/* $Id: IEMAllN8veRecompiler.cpp 102012 2023-11-09 02:09:51Z vboxsync $ */ /** @file * IEM - Native Recompiler * * Logging group IEM_RE_NATIVE assignments: * - Level 1 (Log) : ... * - Flow (LogFlow) : ... * - Level 2 (Log2) : ... * - Level 3 (Log3) : Disassemble native code after recompiling. * - Level 4 (Log4) : ... * - Level 5 (Log5) : ... * - Level 6 (Log6) : ... * - Level 7 (Log7) : ... * - Level 8 (Log8) : ... * - Level 9 (Log9) : ... * - Level 10 (Log10): ... * - Level 11 (Log11): Variable allocator. * - Level 12 (Log12): Register allocator. */ /* * Copyright (C) 2023 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_IEM_RE_NATIVE #define IEM_WITH_OPAQUE_DECODER_STATE #define VMCPU_INCL_CPUM_GST_CTX #define VMM_INCLUDED_SRC_include_IEMMc_h /* block IEMMc.h inclusion. */ #include #include #include #include "IEMInternal.h" #include #include #include #include #include #include #include #include #include #if defined(RT_ARCH_AMD64) # include #elif defined(RT_ARCH_ARM64) # include #endif #ifdef RT_OS_WINDOWS # include /* this is incomaptible with windows.h, thus: */ extern "C" DECLIMPORT(uint8_t) __cdecl RtlAddFunctionTable(void *pvFunctionTable, uint32_t cEntries, uintptr_t uBaseAddress); extern "C" DECLIMPORT(uint8_t) __cdecl RtlDelFunctionTable(void *pvFunctionTable); #else # include # if defined(RT_OS_DARWIN) # include # define IEMNATIVE_USE_LIBUNWIND extern "C" void __register_frame(const void *pvFde); extern "C" void __deregister_frame(const void *pvFde); # else # ifdef DEBUG_bird /** @todo not thread safe yet */ # define IEMNATIVE_USE_GDB_JIT # endif # ifdef IEMNATIVE_USE_GDB_JIT # include # include # include # endif extern "C" void __register_frame_info(void *pvBegin, void *pvObj); /* found no header for these two */ extern "C" void *__deregister_frame_info(void *pvBegin); /* (returns pvObj from __register_frame_info call) */ # endif #endif #ifdef VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER # include "/opt/local/include/capstone/capstone.h" #endif #include "IEMInline.h" #include "IEMThreadedFunctions.h" #include "IEMN8veRecompiler.h" #include "IEMNativeFunctions.h" /* * Narrow down configs here to avoid wasting time on unused configs here. * Note! Same checks in IEMAllThrdRecompiler.cpp. */ #ifndef IEM_WITH_CODE_TLB # error The code TLB must be enabled for the recompiler. #endif #ifndef IEM_WITH_DATA_TLB # error The data TLB must be enabled for the recompiler. #endif #ifndef IEM_WITH_SETJMP # error The setjmp approach must be enabled for the recompiler. #endif /** @todo eliminate this clang build hack. */ #if RT_CLANG_PREREQ(4, 0) # pragma GCC diagnostic ignored "-Wunused-function" #endif /********************************************************************************************************************************* * Defined Constants And Macros * *********************************************************************************************************************************/ /** Always count instructions for now. */ #define IEMNATIVE_WITH_INSTRUCTION_COUNTING /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ #ifdef VBOX_STRICT static uint32_t iemNativeEmitGuestRegValueCheck(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxReg, IEMNATIVEGSTREG enmGstReg); #endif #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO static void iemNativeDbgInfoAddNativeOffset(PIEMRECOMPILERSTATE pReNative, uint32_t off); static void iemNativeDbgInfoAddLabel(PIEMRECOMPILERSTATE pReNative, IEMNATIVELABELTYPE enmType, uint16_t uData); #endif /********************************************************************************************************************************* * Executable Memory Allocator * *********************************************************************************************************************************/ /** @def IEMEXECMEM_USE_ALT_SUB_ALLOCATOR * Use an alternative chunk sub-allocator that does store internal data * in the chunk. * * Using the RTHeapSimple is not practial on newer darwin systems where * RTMEM_PROT_WRITE and RTMEM_PROT_EXEC are mutually exclusive in process * memory. We would have to change the protection of the whole chunk for * every call to RTHeapSimple, which would be rather expensive. * * This alternative implemenation let restrict page protection modifications * to the pages backing the executable memory we just allocated. */ #define IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /** The chunk sub-allocation unit size in bytes. */ #define IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE 128 /** The chunk sub-allocation unit size as a shift factor. */ #define IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT 7 #if defined(IN_RING3) && !defined(RT_OS_WINDOWS) # ifdef IEMNATIVE_USE_GDB_JIT # define IEMNATIVE_USE_GDB_JIT_ET_DYN /** GDB JIT: Code entry. */ typedef struct GDBJITCODEENTRY { struct GDBJITCODEENTRY *pNext; struct GDBJITCODEENTRY *pPrev; uint8_t *pbSymFile; uint64_t cbSymFile; } GDBJITCODEENTRY; /** GDB JIT: Actions. */ typedef enum GDBJITACTIONS : uint32_t { kGdbJitaction_NoAction = 0, kGdbJitaction_Register, kGdbJitaction_Unregister } GDBJITACTIONS; /** GDB JIT: Descriptor. */ typedef struct GDBJITDESCRIPTOR { uint32_t uVersion; GDBJITACTIONS enmAction; GDBJITCODEENTRY *pRelevant; GDBJITCODEENTRY *pHead; /** Our addition: */ GDBJITCODEENTRY *pTail; } GDBJITDESCRIPTOR; /** GDB JIT: Our simple symbol file data. */ typedef struct GDBJITSYMFILE { Elf64_Ehdr EHdr; # ifndef IEMNATIVE_USE_GDB_JIT_ET_DYN Elf64_Shdr aShdrs[5]; # else Elf64_Shdr aShdrs[7]; Elf64_Phdr aPhdrs[2]; # endif /** The dwarf ehframe data for the chunk. */ uint8_t abEhFrame[512]; char szzStrTab[128]; Elf64_Sym aSymbols[3]; # ifdef IEMNATIVE_USE_GDB_JIT_ET_DYN Elf64_Sym aDynSyms[2]; Elf64_Dyn aDyn[6]; # endif } GDBJITSYMFILE; extern "C" GDBJITDESCRIPTOR __jit_debug_descriptor; extern "C" DECLEXPORT(void) __jit_debug_register_code(void); /** Init once for g_IemNativeGdbJitLock. */ static RTONCE g_IemNativeGdbJitOnce = RTONCE_INITIALIZER; /** Init once for the critical section. */ static RTCRITSECT g_IemNativeGdbJitLock; /** GDB reads the info here. */ GDBJITDESCRIPTOR __jit_debug_descriptor = { 1, kGdbJitaction_NoAction, NULL, NULL }; /** GDB sets a breakpoint on this and checks __jit_debug_descriptor when hit. */ DECL_NO_INLINE(RT_NOTHING, DECLEXPORT(void)) __jit_debug_register_code(void) { ASMNopPause(); } /** @callback_method_impl{FNRTONCE} */ static DECLCALLBACK(int32_t) iemNativeGdbJitInitOnce(void *pvUser) { RT_NOREF(pvUser); return RTCritSectInit(&g_IemNativeGdbJitLock); } # endif /* IEMNATIVE_USE_GDB_JIT */ /** * Per-chunk unwind info for non-windows hosts. */ typedef struct IEMEXECMEMCHUNKEHFRAME { # ifdef IEMNATIVE_USE_LIBUNWIND /** The offset of the FDA into abEhFrame. */ uintptr_t offFda; # else /** 'struct object' storage area. */ uint8_t abObject[1024]; # endif # ifdef IEMNATIVE_USE_GDB_JIT # if 0 /** The GDB JIT 'symbol file' data. */ GDBJITSYMFILE GdbJitSymFile; # endif /** The GDB JIT list entry. */ GDBJITCODEENTRY GdbJitEntry; # endif /** The dwarf ehframe data for the chunk. */ uint8_t abEhFrame[512]; } IEMEXECMEMCHUNKEHFRAME; /** Pointer to per-chunk info info for non-windows hosts. */ typedef IEMEXECMEMCHUNKEHFRAME *PIEMEXECMEMCHUNKEHFRAME; #endif /** * An chunk of executable memory. */ typedef struct IEMEXECMEMCHUNK { #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /** Number of free items in this chunk. */ uint32_t cFreeUnits; /** Hint were to start searching for free space in the allocation bitmap. */ uint32_t idxFreeHint; #else /** The heap handle. */ RTHEAPSIMPLE hHeap; #endif /** Pointer to the chunk. */ void *pvChunk; #ifdef IN_RING3 /** * Pointer to the unwind information. * * This is used during C++ throw and longjmp (windows and probably most other * platforms). Some debuggers (windbg) makes use of it as well. * * Windows: This is allocated from hHeap on windows because (at least for * AMD64) the UNWIND_INFO structure address in the * RUNTIME_FUNCTION entry is an RVA and the chunk is the "image". * * Others: Allocated from the regular heap to avoid unnecessary executable data * structures. This points to an IEMEXECMEMCHUNKEHFRAME structure. */ void *pvUnwindInfo; #elif defined(IN_RING0) /** Allocation handle. */ RTR0MEMOBJ hMemObj; #endif } IEMEXECMEMCHUNK; /** Pointer to a memory chunk. */ typedef IEMEXECMEMCHUNK *PIEMEXECMEMCHUNK; /** * Executable memory allocator for the native recompiler. */ typedef struct IEMEXECMEMALLOCATOR { /** Magic value (IEMEXECMEMALLOCATOR_MAGIC). */ uint32_t uMagic; /** The chunk size. */ uint32_t cbChunk; /** The maximum number of chunks. */ uint32_t cMaxChunks; /** The current number of chunks. */ uint32_t cChunks; /** Hint where to start looking for available memory. */ uint32_t idxChunkHint; /** Statistics: Current number of allocations. */ uint32_t cAllocations; /** The total amount of memory available. */ uint64_t cbTotal; /** Total amount of free memory. */ uint64_t cbFree; /** Total amount of memory allocated. */ uint64_t cbAllocated; #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /** Pointer to the allocation bitmaps for all the chunks (follows aChunks). * * Since the chunk size is a power of two and the minimum chunk size is a lot * higher than the IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE, each chunk will always * require a whole number of uint64_t elements in the allocation bitmap. So, * for sake of simplicity, they are allocated as one continous chunk for * simplicity/laziness. */ uint64_t *pbmAlloc; /** Number of units (IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE) per chunk. */ uint32_t cUnitsPerChunk; /** Number of bitmap elements per chunk (for quickly locating the bitmap * portion corresponding to an chunk). */ uint32_t cBitmapElementsPerChunk; #else /** @name Tweaks to get 64 byte aligned allocats w/o unnecessary fragmentation. * @{ */ /** The size of the heap internal block header. This is used to adjust the * request memory size to make sure there is exacly enough room for a header at * the end of the blocks we allocate before the next 64 byte alignment line. */ uint32_t cbHeapBlockHdr; /** The size of initial heap allocation required make sure the first * allocation is correctly aligned. */ uint32_t cbHeapAlignTweak; /** The alignment tweak allocation address. */ void *pvAlignTweak; /** @} */ #endif #if defined(IN_RING3) && !defined(RT_OS_WINDOWS) /** Pointer to the array of unwind info running parallel to aChunks (same * allocation as this structure, located after the bitmaps). * (For Windows, the structures must reside in 32-bit RVA distance to the * actual chunk, so they are allocated off the chunk.) */ PIEMEXECMEMCHUNKEHFRAME paEhFrames; #endif /** The allocation chunks. */ RT_FLEXIBLE_ARRAY_EXTENSION IEMEXECMEMCHUNK aChunks[RT_FLEXIBLE_ARRAY]; } IEMEXECMEMALLOCATOR; /** Pointer to an executable memory allocator. */ typedef IEMEXECMEMALLOCATOR *PIEMEXECMEMALLOCATOR; /** Magic value for IEMEXECMEMALLOCATOR::uMagic (Scott Frederick Turow). */ #define IEMEXECMEMALLOCATOR_MAGIC UINT32_C(0x19490412) static int iemExecMemAllocatorGrow(PVMCPUCC pVCpu, PIEMEXECMEMALLOCATOR pExecMemAllocator); /** * Worker for iemExecMemAllocatorAlloc that returns @a pvRet after updating * the heap statistics. */ static void * iemExecMemAllocatorAllocTailCode(PIEMEXECMEMALLOCATOR pExecMemAllocator, void *pvRet, uint32_t cbReq, uint32_t idxChunk) { pExecMemAllocator->cAllocations += 1; pExecMemAllocator->cbAllocated += cbReq; #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR pExecMemAllocator->cbFree -= cbReq; #else pExecMemAllocator->cbFree -= RT_ALIGN_32(cbReq, 64); #endif pExecMemAllocator->idxChunkHint = idxChunk; #ifdef RT_OS_DARWIN /* * Sucks, but RTMEM_PROT_EXEC and RTMEM_PROT_WRITE are mutually exclusive * on darwin. So, we mark the pages returned as read+write after alloc and * expect the caller to call iemExecMemAllocatorReadyForUse when done * writing to the allocation. * * See also https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon * for details. */ /** @todo detect if this is necessary... it wasn't required on 10.15 or * whatever older version it was. */ int rc = RTMemProtect(pvRet, cbReq, RTMEM_PROT_WRITE | RTMEM_PROT_READ); AssertRC(rc); #endif return pvRet; } #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR static void *iemExecMemAllocatorAllocInChunkInt(PIEMEXECMEMALLOCATOR pExecMemAllocator, uint64_t *pbmAlloc, uint32_t idxFirst, uint32_t cToScan, uint32_t cReqUnits, uint32_t idxChunk) { /* * Shift the bitmap to the idxFirst bit so we can use ASMBitFirstClear. */ Assert(!(cToScan & 63)); Assert(!(idxFirst & 63)); Assert(cToScan + idxFirst <= pExecMemAllocator->cUnitsPerChunk); pbmAlloc += idxFirst / 64; /* * Scan the bitmap for cReqUnits of consequtive clear bits */ /** @todo This can probably be done more efficiently for non-x86 systems. */ int iBit = ASMBitFirstClear(pbmAlloc, cToScan); while (iBit >= 0 && (uint32_t)iBit <= cToScan - cReqUnits) { uint32_t idxAddBit = 1; while (idxAddBit < cReqUnits && !ASMBitTest(pbmAlloc, (uint32_t)iBit + idxAddBit)) idxAddBit++; if (idxAddBit >= cReqUnits) { ASMBitSetRange(pbmAlloc, (uint32_t)iBit, (uint32_t)iBit + cReqUnits); PIEMEXECMEMCHUNK const pChunk = &pExecMemAllocator->aChunks[idxChunk]; pChunk->cFreeUnits -= cReqUnits; pChunk->idxFreeHint = (uint32_t)iBit + cReqUnits; void * const pvRet = (uint8_t *)pChunk->pvChunk + ((idxFirst + (uint32_t)iBit) << IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT); return iemExecMemAllocatorAllocTailCode(pExecMemAllocator, pvRet, cReqUnits << IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT, idxChunk); } iBit = ASMBitNextClear(pbmAlloc, cToScan, iBit + idxAddBit - 1); } return NULL; } #endif /* IEMEXECMEM_USE_ALT_SUB_ALLOCATOR */ static void *iemExecMemAllocatorAllocInChunk(PIEMEXECMEMALLOCATOR pExecMemAllocator, uint32_t idxChunk, uint32_t cbReq) { #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /* * Figure out how much to allocate. */ uint32_t const cReqUnits = (cbReq + IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE - 1) >> IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT; if (cReqUnits <= pExecMemAllocator->aChunks[idxChunk].cFreeUnits) { uint64_t * const pbmAlloc = &pExecMemAllocator->pbmAlloc[pExecMemAllocator->cBitmapElementsPerChunk * idxChunk]; uint32_t const idxHint = pExecMemAllocator->aChunks[idxChunk].idxFreeHint & ~(uint32_t)63; if (idxHint + cReqUnits <= pExecMemAllocator->cUnitsPerChunk) { void *pvRet = iemExecMemAllocatorAllocInChunkInt(pExecMemAllocator, pbmAlloc, idxHint, pExecMemAllocator->cUnitsPerChunk - idxHint, cReqUnits, idxChunk); if (pvRet) return pvRet; } return iemExecMemAllocatorAllocInChunkInt(pExecMemAllocator, pbmAlloc, 0, RT_MIN(pExecMemAllocator->cUnitsPerChunk, RT_ALIGN_32(idxHint + cReqUnits, 64)), cReqUnits, idxChunk); } #else void *pvRet = RTHeapSimpleAlloc(pExecMemAllocator->aChunks[idxChunk].hHeap, cbReq, 32); if (pvRet) return iemExecMemAllocatorAllocTailCode(pExecMemAllocator, pvRet, cbReq, idxChunk); #endif return NULL; } /** * Allocates @a cbReq bytes of executable memory. * * @returns Pointer to the memory, NULL if out of memory or other problem * encountered. * @param pVCpu The cross context virtual CPU structure of the calling * thread. * @param cbReq How many bytes are required. */ static void *iemExecMemAllocatorAlloc(PVMCPU pVCpu, uint32_t cbReq) { PIEMEXECMEMALLOCATOR pExecMemAllocator = pVCpu->iem.s.pExecMemAllocatorR3; AssertReturn(pExecMemAllocator && pExecMemAllocator->uMagic == IEMEXECMEMALLOCATOR_MAGIC, NULL); AssertMsgReturn(cbReq > 32 && cbReq < _512K, ("%#x\n", cbReq), NULL); /* * Adjust the request size so it'll fit the allocator alignment/whatnot. * * For the RTHeapSimple allocator this means to follow the logic described * in iemExecMemAllocatorGrow and attempt to allocate it from one of the * existing chunks if we think we've got sufficient free memory around. * * While for the alternative one we just align it up to a whole unit size. */ #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR cbReq = RT_ALIGN_32(cbReq, IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE); #else cbReq = RT_ALIGN_32(cbReq + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr; #endif if (cbReq <= pExecMemAllocator->cbFree) { uint32_t const cChunks = pExecMemAllocator->cChunks; uint32_t const idxChunkHint = pExecMemAllocator->idxChunkHint < cChunks ? pExecMemAllocator->idxChunkHint : 0; for (uint32_t idxChunk = idxChunkHint; idxChunk < cChunks; idxChunk++) { void *pvRet = iemExecMemAllocatorAllocInChunk(pExecMemAllocator, idxChunk, cbReq); if (pvRet) return pvRet; } for (uint32_t idxChunk = 0; idxChunk < idxChunkHint; idxChunk++) { void *pvRet = iemExecMemAllocatorAllocInChunk(pExecMemAllocator, idxChunk, cbReq); if (pvRet) return pvRet; } } /* * Can we grow it with another chunk? */ if (pExecMemAllocator->cChunks < pExecMemAllocator->cMaxChunks) { int rc = iemExecMemAllocatorGrow(pVCpu, pExecMemAllocator); AssertLogRelRCReturn(rc, NULL); uint32_t const idxChunk = pExecMemAllocator->cChunks - 1; void *pvRet = iemExecMemAllocatorAllocInChunk(pExecMemAllocator, idxChunk, cbReq); if (pvRet) return pvRet; AssertFailed(); } /* What now? Prune native translation blocks from the cache? */ AssertFailed(); return NULL; } /** This is a hook that we may need later for changing memory protection back * to readonly+exec */ static void iemExecMemAllocatorReadyForUse(PVMCPUCC pVCpu, void *pv, size_t cb) { #ifdef RT_OS_DARWIN /* See iemExecMemAllocatorAllocTailCode for the explanation. */ int rc = RTMemProtect(pv, cb, RTMEM_PROT_EXEC | RTMEM_PROT_READ); AssertRC(rc); RT_NOREF(pVCpu); /* * Flush the instruction cache: * https://developer.apple.com/documentation/apple-silicon/porting-just-in-time-compilers-to-apple-silicon */ /* sys_dcache_flush(pv, cb); - not necessary */ sys_icache_invalidate(pv, cb); #else RT_NOREF(pVCpu, pv, cb); #endif } /** * Frees executable memory. */ void iemExecMemAllocatorFree(PVMCPU pVCpu, void *pv, size_t cb) { PIEMEXECMEMALLOCATOR pExecMemAllocator = pVCpu->iem.s.pExecMemAllocatorR3; Assert(pExecMemAllocator && pExecMemAllocator->uMagic == IEMEXECMEMALLOCATOR_MAGIC); Assert(pv); #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR Assert(!((uintptr_t)pv & (IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE - 1))); #else Assert(!((uintptr_t)pv & 63)); #endif /* Align the size as we did when allocating the block. */ #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR cb = RT_ALIGN_Z(cb, IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE); #else cb = RT_ALIGN_Z(cb + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr; #endif /* Free it / assert sanity. */ #if defined(VBOX_STRICT) || defined(IEMEXECMEM_USE_ALT_SUB_ALLOCATOR) uint32_t const cChunks = pExecMemAllocator->cChunks; uint32_t const cbChunk = pExecMemAllocator->cbChunk; bool fFound = false; for (uint32_t idxChunk = 0; idxChunk < cChunks; idxChunk++) { uintptr_t const offChunk = (uintptr_t)pv - (uintptr_t)pExecMemAllocator->aChunks[idxChunk].pvChunk; fFound = offChunk < cbChunk; if (fFound) { #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR uint32_t const idxFirst = (uint32_t)offChunk >> IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT; uint32_t const cReqUnits = (uint32_t)cb >> IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT; /* Check that it's valid and free it. */ uint64_t * const pbmAlloc = &pExecMemAllocator->pbmAlloc[pExecMemAllocator->cBitmapElementsPerChunk * idxChunk]; AssertReturnVoid(ASMBitTest(pbmAlloc, idxFirst)); for (uint32_t i = 1; i < cReqUnits; i++) AssertReturnVoid(ASMBitTest(pbmAlloc, idxFirst + i)); ASMBitClearRange(pbmAlloc, idxFirst, idxFirst + cReqUnits); pExecMemAllocator->aChunks[idxChunk].cFreeUnits += cReqUnits; pExecMemAllocator->aChunks[idxChunk].idxFreeHint = idxFirst; /* Update the stats. */ pExecMemAllocator->cbAllocated -= cb; pExecMemAllocator->cbFree += cb; pExecMemAllocator->cAllocations -= 1; return; #else Assert(RTHeapSimpleSize(pExecMemAllocator->aChunks[idxChunk].hHeap, pv) == cb); break; #endif } } # ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR AssertFailed(); # else Assert(fFound); # endif #endif #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /* Update stats while cb is freshly calculated.*/ pExecMemAllocator->cbAllocated -= cb; pExecMemAllocator->cbFree += RT_ALIGN_Z(cb, 64); pExecMemAllocator->cAllocations -= 1; /* Free it. */ RTHeapSimpleFree(NIL_RTHEAPSIMPLE, pv); #endif } #ifdef IN_RING3 # ifdef RT_OS_WINDOWS /** * Initializes the unwind info structures for windows hosts. */ static int iemExecMemAllocatorInitAndRegisterUnwindInfoForChunk(PVMCPUCC pVCpu, PIEMEXECMEMALLOCATOR pExecMemAllocator, void *pvChunk, uint32_t idxChunk) { RT_NOREF(pVCpu); /* * The AMD64 unwind opcodes. * * This is a program that starts with RSP after a RET instruction that * ends up in recompiled code, and the operations we describe here will * restore all non-volatile registers and bring RSP back to where our * RET address is. This means it's reverse order from what happens in * the prologue. * * Note! Using a frame register approach here both because we have one * and but mainly because the UWOP_ALLOC_LARGE argument values * would be a pain to write initializers for. On the positive * side, we're impervious to changes in the the stack variable * area can can deal with dynamic stack allocations if necessary. */ static const IMAGE_UNWIND_CODE s_aOpcodes[] = { { { 16, IMAGE_AMD64_UWOP_SET_FPREG, 0 } }, /* RSP = RBP - FrameOffset * 10 (0x60) */ { { 16, IMAGE_AMD64_UWOP_ALLOC_SMALL, 0 } }, /* RSP += 8; */ { { 14, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_x15 } }, /* R15 = [RSP]; RSP += 8; */ { { 12, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_x14 } }, /* R14 = [RSP]; RSP += 8; */ { { 10, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_x13 } }, /* R13 = [RSP]; RSP += 8; */ { { 8, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_x12 } }, /* R12 = [RSP]; RSP += 8; */ { { 7, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_xDI } }, /* RDI = [RSP]; RSP += 8; */ { { 6, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_xSI } }, /* RSI = [RSP]; RSP += 8; */ { { 5, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_xBX } }, /* RBX = [RSP]; RSP += 8; */ { { 4, IMAGE_AMD64_UWOP_PUSH_NONVOL, X86_GREG_xBP } }, /* RBP = [RSP]; RSP += 8; */ }; union { IMAGE_UNWIND_INFO Info; uint8_t abPadding[RT_UOFFSETOF(IMAGE_UNWIND_INFO, aOpcodes) + 16]; } s_UnwindInfo = { { /* .Version = */ 1, /* .Flags = */ 0, /* .SizeOfProlog = */ 16, /* whatever */ /* .CountOfCodes = */ RT_ELEMENTS(s_aOpcodes), /* .FrameRegister = */ X86_GREG_xBP, /* .FrameOffset = */ (-IEMNATIVE_FP_OFF_LAST_PUSH + 8) / 16 /* we're off by one slot. sigh. */, } }; AssertCompile(-IEMNATIVE_FP_OFF_LAST_PUSH < 240 && -IEMNATIVE_FP_OFF_LAST_PUSH > 0); AssertCompile((-IEMNATIVE_FP_OFF_LAST_PUSH & 0xf) == 8); /* * Calc how much space we need and allocate it off the exec heap. */ unsigned const cFunctionEntries = 1; unsigned const cbUnwindInfo = sizeof(s_aOpcodes) + RT_UOFFSETOF(IMAGE_UNWIND_INFO, aOpcodes); unsigned const cbNeeded = sizeof(IMAGE_RUNTIME_FUNCTION_ENTRY) * cFunctionEntries + cbUnwindInfo; # ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR unsigned const cbNeededAligned = RT_ALIGN_32(cbNeeded, IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE); PIMAGE_RUNTIME_FUNCTION_ENTRY const paFunctions = (PIMAGE_RUNTIME_FUNCTION_ENTRY)iemExecMemAllocatorAllocInChunk(pExecMemAllocator, idxChunk, cbNeededAligned); # else unsigned const cbNeededAligned = RT_ALIGN_32(cbNeeded + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr; PIMAGE_RUNTIME_FUNCTION_ENTRY const paFunctions = (PIMAGE_RUNTIME_FUNCTION_ENTRY)RTHeapSimpleAlloc(hHeap, cbNeededAligned, 32 /*cbAlignment*/); # endif AssertReturn(paFunctions, VERR_INTERNAL_ERROR_5); pExecMemAllocator->aChunks[idxChunk].pvUnwindInfo = paFunctions; /* * Initialize the structures. */ PIMAGE_UNWIND_INFO const pInfo = (PIMAGE_UNWIND_INFO)&paFunctions[cFunctionEntries]; paFunctions[0].BeginAddress = 0; paFunctions[0].EndAddress = pExecMemAllocator->cbChunk; paFunctions[0].UnwindInfoAddress = (uint32_t)((uintptr_t)pInfo - (uintptr_t)pvChunk); memcpy(pInfo, &s_UnwindInfo, RT_UOFFSETOF(IMAGE_UNWIND_INFO, aOpcodes)); memcpy(&pInfo->aOpcodes[0], s_aOpcodes, sizeof(s_aOpcodes)); /* * Register it. */ uint8_t fRet = RtlAddFunctionTable(paFunctions, cFunctionEntries, (uintptr_t)pvChunk); AssertReturn(fRet, VERR_INTERNAL_ERROR_3); /* Nothing to clean up on failure, since its within the chunk itself. */ return VINF_SUCCESS; } # else /* !RT_OS_WINDOWS */ /** * Emits a LEB128 encoded value between -0x2000 and 0x2000 (both exclusive). */ DECLINLINE(RTPTRUNION) iemDwarfPutLeb128(RTPTRUNION Ptr, int32_t iValue) { if (iValue >= 64) { Assert(iValue < 0x2000); *Ptr.pb++ = ((uint8_t)iValue & 0x7f) | 0x80; *Ptr.pb++ = (uint8_t)(iValue >> 7) & 0x3f; } else if (iValue >= 0) *Ptr.pb++ = (uint8_t)iValue; else if (iValue > -64) *Ptr.pb++ = ((uint8_t)iValue & 0x3f) | 0x40; else { Assert(iValue > -0x2000); *Ptr.pb++ = ((uint8_t)iValue & 0x7f) | 0x80; *Ptr.pb++ = ((uint8_t)(iValue >> 7) & 0x3f) | 0x40; } return Ptr; } /** * Emits an ULEB128 encoded value (up to 64-bit wide). */ DECLINLINE(RTPTRUNION) iemDwarfPutUleb128(RTPTRUNION Ptr, uint64_t uValue) { while (uValue >= 0x80) { *Ptr.pb++ = ((uint8_t)uValue & 0x7f) | 0x80; uValue >>= 7; } *Ptr.pb++ = (uint8_t)uValue; return Ptr; } /** * Emits a CFA rule as register @a uReg + offset @a off. */ DECLINLINE(RTPTRUNION) iemDwarfPutCfaDefCfa(RTPTRUNION Ptr, uint32_t uReg, uint32_t off) { *Ptr.pb++ = DW_CFA_def_cfa; Ptr = iemDwarfPutUleb128(Ptr, uReg); Ptr = iemDwarfPutUleb128(Ptr, off); return Ptr; } /** * Emits a register (@a uReg) save location: * CFA + @a off * data_alignment_factor */ DECLINLINE(RTPTRUNION) iemDwarfPutCfaOffset(RTPTRUNION Ptr, uint32_t uReg, uint32_t off) { if (uReg < 0x40) *Ptr.pb++ = DW_CFA_offset | uReg; else { *Ptr.pb++ = DW_CFA_offset_extended; Ptr = iemDwarfPutUleb128(Ptr, uReg); } Ptr = iemDwarfPutUleb128(Ptr, off); return Ptr; } # if 0 /* unused */ /** * Emits a register (@a uReg) save location, using signed offset: * CFA + @a offSigned * data_alignment_factor */ DECLINLINE(RTPTRUNION) iemDwarfPutCfaSignedOffset(RTPTRUNION Ptr, uint32_t uReg, int32_t offSigned) { *Ptr.pb++ = DW_CFA_offset_extended_sf; Ptr = iemDwarfPutUleb128(Ptr, uReg); Ptr = iemDwarfPutLeb128(Ptr, offSigned); return Ptr; } # endif /** * Initializes the unwind info section for non-windows hosts. */ static int iemExecMemAllocatorInitAndRegisterUnwindInfoForChunk(PVMCPUCC pVCpu, PIEMEXECMEMALLOCATOR pExecMemAllocator, void *pvChunk, uint32_t idxChunk) { PIEMEXECMEMCHUNKEHFRAME const pEhFrame = &pExecMemAllocator->paEhFrames[idxChunk]; pExecMemAllocator->aChunks[idxChunk].pvUnwindInfo = pEhFrame; /* not necessary, but whatever */ RTPTRUNION Ptr = { pEhFrame->abEhFrame }; /* * Generate the CIE first. */ # ifdef IEMNATIVE_USE_LIBUNWIND /* libunwind (llvm, darwin) only supports v1 and v3. */ uint8_t const iDwarfVer = 3; # else uint8_t const iDwarfVer = 4; # endif RTPTRUNION const PtrCie = Ptr; *Ptr.pu32++ = 123; /* The CIE length will be determined later. */ *Ptr.pu32++ = 0 /*UINT32_MAX*/; /* I'm a CIE in .eh_frame speak. */ *Ptr.pb++ = iDwarfVer; /* DwARF version */ *Ptr.pb++ = 0; /* Augmentation. */ if (iDwarfVer >= 4) { *Ptr.pb++ = sizeof(uintptr_t); /* Address size. */ *Ptr.pb++ = 0; /* Segment selector size. */ } # ifdef RT_ARCH_AMD64 Ptr = iemDwarfPutLeb128(Ptr, 1); /* Code alignment factor (LEB128 = 1). */ # else Ptr = iemDwarfPutLeb128(Ptr, 4); /* Code alignment factor (LEB128 = 4). */ # endif Ptr = iemDwarfPutLeb128(Ptr, -8); /* Data alignment factor (LEB128 = -8). */ # ifdef RT_ARCH_AMD64 Ptr = iemDwarfPutUleb128(Ptr, DWREG_AMD64_RA); /* Return address column (ULEB128) */ # elif defined(RT_ARCH_ARM64) Ptr = iemDwarfPutUleb128(Ptr, DWREG_ARM64_LR); /* Return address column (ULEB128) */ # else # error "port me" # endif /* Initial instructions: */ # ifdef RT_ARCH_AMD64 Ptr = iemDwarfPutCfaDefCfa(Ptr, DWREG_AMD64_RBP, 16); /* CFA = RBP + 0x10 - first stack parameter */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_RA, 1); /* Ret RIP = [CFA + 1*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_RBP, 2); /* RBP = [CFA + 2*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_RBX, 3); /* RBX = [CFA + 3*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_R12, 4); /* R12 = [CFA + 4*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_R13, 5); /* R13 = [CFA + 5*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_R14, 6); /* R14 = [CFA + 6*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_AMD64_R15, 7); /* R15 = [CFA + 7*-8] */ # elif defined(RT_ARCH_ARM64) # if 1 Ptr = iemDwarfPutCfaDefCfa(Ptr, DWREG_ARM64_BP, 16); /* CFA = BP + 0x10 - first stack parameter */ # else Ptr = iemDwarfPutCfaDefCfa(Ptr, DWREG_ARM64_SP, IEMNATIVE_FRAME_VAR_SIZE + IEMNATIVE_FRAME_SAVE_REG_SIZE); # endif Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_LR, 1); /* Ret PC = [CFA + 1*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_BP, 2); /* Ret BP = [CFA + 2*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X28, 3); /* X28 = [CFA + 3*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X27, 4); /* X27 = [CFA + 4*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X26, 5); /* X26 = [CFA + 5*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X25, 6); /* X25 = [CFA + 6*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X24, 7); /* X24 = [CFA + 7*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X23, 8); /* X23 = [CFA + 8*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X22, 9); /* X22 = [CFA + 9*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X21, 10); /* X21 = [CFA +10*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X20, 11); /* X20 = [CFA +11*-8] */ Ptr = iemDwarfPutCfaOffset(Ptr, DWREG_ARM64_X19, 12); /* X19 = [CFA +12*-8] */ AssertCompile(IEMNATIVE_FRAME_SAVE_REG_SIZE / 8 == 12); /** @todo we we need to do something about clearing DWREG_ARM64_RA_SIGN_STATE or something? */ # else # error "port me" # endif while ((Ptr.u - PtrCie.u) & 3) *Ptr.pb++ = DW_CFA_nop; /* Finalize the CIE size. */ *PtrCie.pu32 = Ptr.u - PtrCie.u - sizeof(uint32_t); /* * Generate an FDE for the whole chunk area. */ # ifdef IEMNATIVE_USE_LIBUNWIND pEhFrame->offFda = Ptr.u - (uintptr_t)&pEhFrame->abEhFrame[0]; # endif RTPTRUNION const PtrFde = Ptr; *Ptr.pu32++ = 123; /* The CIE length will be determined later. */ *Ptr.pu32 = Ptr.u - PtrCie.u; /* Negated self relative CIE address. */ Ptr.pu32++; *Ptr.pu64++ = (uintptr_t)pvChunk; /* Absolute start PC of this FDE. */ *Ptr.pu64++ = pExecMemAllocator->cbChunk; /* PC range length for this PDE. */ # if 0 /* not requried for recent libunwind.dylib nor recent libgcc/glib. */ *Ptr.pb++ = DW_CFA_nop; # endif while ((Ptr.u - PtrFde.u) & 3) *Ptr.pb++ = DW_CFA_nop; /* Finalize the FDE size. */ *PtrFde.pu32 = Ptr.u - PtrFde.u - sizeof(uint32_t); /* Terminator entry. */ *Ptr.pu32++ = 0; *Ptr.pu32++ = 0; /* just to be sure... */ Assert(Ptr.u - (uintptr_t)&pEhFrame->abEhFrame[0] <= sizeof(pEhFrame->abEhFrame)); /* * Register it. */ # ifdef IEMNATIVE_USE_LIBUNWIND __register_frame(&pEhFrame->abEhFrame[pEhFrame->offFda]); # else memset(pEhFrame->abObject, 0xf6, sizeof(pEhFrame->abObject)); /* color the memory to better spot usage */ __register_frame_info(pEhFrame->abEhFrame, pEhFrame->abObject); # endif # ifdef IEMNATIVE_USE_GDB_JIT /* * Now for telling GDB about this (experimental). * * This seems to work best with ET_DYN. */ unsigned const cbNeeded = sizeof(GDBJITSYMFILE); # ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR unsigned const cbNeededAligned = RT_ALIGN_32(cbNeeded, IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SIZE); GDBJITSYMFILE * const pSymFile = (GDBJITSYMFILE *)iemExecMemAllocatorAllocInChunk(pExecMemAllocator, idxChunk, cbNeededAligned); # else unsigned const cbNeededAligned = RT_ALIGN_32(cbNeeded + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr; GDBJITSYMFILE * const pSymFile = (PIMAGE_RUNTIME_FUNCTION_ENTRY)RTHeapSimpleAlloc(hHeap, cbNeededAligned, 32 /*cbAlignment*/); # endif AssertReturn(pSymFile, VERR_INTERNAL_ERROR_5); unsigned const offSymFileInChunk = (uintptr_t)pSymFile - (uintptr_t)pvChunk; RT_ZERO(*pSymFile); /* * The ELF header: */ pSymFile->EHdr.e_ident[0] = ELFMAG0; pSymFile->EHdr.e_ident[1] = ELFMAG1; pSymFile->EHdr.e_ident[2] = ELFMAG2; pSymFile->EHdr.e_ident[3] = ELFMAG3; pSymFile->EHdr.e_ident[EI_VERSION] = EV_CURRENT; pSymFile->EHdr.e_ident[EI_CLASS] = ELFCLASS64; pSymFile->EHdr.e_ident[EI_DATA] = ELFDATA2LSB; pSymFile->EHdr.e_ident[EI_OSABI] = ELFOSABI_NONE; # ifdef IEMNATIVE_USE_GDB_JIT_ET_DYN pSymFile->EHdr.e_type = ET_DYN; # else pSymFile->EHdr.e_type = ET_REL; # endif # ifdef RT_ARCH_AMD64 pSymFile->EHdr.e_machine = EM_AMD64; # elif defined(RT_ARCH_ARM64) pSymFile->EHdr.e_machine = EM_AARCH64; # else # error "port me" # endif pSymFile->EHdr.e_version = 1; /*?*/ pSymFile->EHdr.e_entry = 0; # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) pSymFile->EHdr.e_phoff = RT_UOFFSETOF(GDBJITSYMFILE, aPhdrs); # else pSymFile->EHdr.e_phoff = 0; # endif pSymFile->EHdr.e_shoff = sizeof(pSymFile->EHdr); pSymFile->EHdr.e_flags = 0; pSymFile->EHdr.e_ehsize = sizeof(pSymFile->EHdr); # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) pSymFile->EHdr.e_phentsize = sizeof(pSymFile->aPhdrs[0]); pSymFile->EHdr.e_phnum = RT_ELEMENTS(pSymFile->aPhdrs); # else pSymFile->EHdr.e_phentsize = 0; pSymFile->EHdr.e_phnum = 0; # endif pSymFile->EHdr.e_shentsize = sizeof(pSymFile->aShdrs[0]); pSymFile->EHdr.e_shnum = RT_ELEMENTS(pSymFile->aShdrs); pSymFile->EHdr.e_shstrndx = 0; /* set later */ uint32_t offStrTab = 0; #define APPEND_STR(a_szStr) do { \ memcpy(&pSymFile->szzStrTab[offStrTab], a_szStr, sizeof(a_szStr)); \ offStrTab += sizeof(a_szStr); \ Assert(offStrTab < sizeof(pSymFile->szzStrTab)); \ } while (0) #define APPEND_STR_FMT(a_szStr, ...) do { \ offStrTab += RTStrPrintf(&pSymFile->szzStrTab[offStrTab], sizeof(pSymFile->szzStrTab) - offStrTab, a_szStr, __VA_ARGS__); \ offStrTab++; \ Assert(offStrTab < sizeof(pSymFile->szzStrTab)); \ } while (0) /* * Section headers. */ /* Section header #0: NULL */ unsigned i = 0; APPEND_STR(""); RT_ZERO(pSymFile->aShdrs[i]); i++; /* Section header: .eh_frame */ pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".eh_frame"); pSymFile->aShdrs[i].sh_type = SHT_PROGBITS; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC | SHF_EXECINSTR; # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) || defined(IEMNATIVE_USE_GDB_JIT_ELF_RVAS) pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = RT_UOFFSETOF(GDBJITSYMFILE, abEhFrame); # else pSymFile->aShdrs[i].sh_addr = (uintptr_t)&pSymFile->abEhFrame[0]; pSymFile->aShdrs[i].sh_offset = 0; # endif pSymFile->aShdrs[i].sh_size = sizeof(pEhFrame->abEhFrame); pSymFile->aShdrs[i].sh_link = 0; pSymFile->aShdrs[i].sh_info = 0; pSymFile->aShdrs[i].sh_addralign = 1; pSymFile->aShdrs[i].sh_entsize = 0; memcpy(pSymFile->abEhFrame, pEhFrame->abEhFrame, sizeof(pEhFrame->abEhFrame)); i++; /* Section header: .shstrtab */ unsigned const iShStrTab = i; pSymFile->EHdr.e_shstrndx = iShStrTab; pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".shstrtab"); pSymFile->aShdrs[i].sh_type = SHT_STRTAB; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC; # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) || defined(IEMNATIVE_USE_GDB_JIT_ELF_RVAS) pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = RT_UOFFSETOF(GDBJITSYMFILE, szzStrTab); # else pSymFile->aShdrs[i].sh_addr = (uintptr_t)&pSymFile->szzStrTab[0]; pSymFile->aShdrs[i].sh_offset = 0; # endif pSymFile->aShdrs[i].sh_size = sizeof(pSymFile->szzStrTab); pSymFile->aShdrs[i].sh_link = 0; pSymFile->aShdrs[i].sh_info = 0; pSymFile->aShdrs[i].sh_addralign = 1; pSymFile->aShdrs[i].sh_entsize = 0; i++; /* Section header: .symbols */ pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".symtab"); pSymFile->aShdrs[i].sh_type = SHT_SYMTAB; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC; pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = RT_UOFFSETOF(GDBJITSYMFILE, aSymbols); pSymFile->aShdrs[i].sh_size = sizeof(pSymFile->aSymbols); pSymFile->aShdrs[i].sh_link = iShStrTab; pSymFile->aShdrs[i].sh_info = RT_ELEMENTS(pSymFile->aSymbols); pSymFile->aShdrs[i].sh_addralign = sizeof(pSymFile->aSymbols[0].st_value); pSymFile->aShdrs[i].sh_entsize = sizeof(pSymFile->aSymbols[0]); i++; # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) /* Section header: .symbols */ pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".dynsym"); pSymFile->aShdrs[i].sh_type = SHT_DYNSYM; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC; pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = RT_UOFFSETOF(GDBJITSYMFILE, aDynSyms); pSymFile->aShdrs[i].sh_size = sizeof(pSymFile->aDynSyms); pSymFile->aShdrs[i].sh_link = iShStrTab; pSymFile->aShdrs[i].sh_info = RT_ELEMENTS(pSymFile->aDynSyms); pSymFile->aShdrs[i].sh_addralign = sizeof(pSymFile->aDynSyms[0].st_value); pSymFile->aShdrs[i].sh_entsize = sizeof(pSymFile->aDynSyms[0]); i++; # endif # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) /* Section header: .dynamic */ pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".dynamic"); pSymFile->aShdrs[i].sh_type = SHT_DYNAMIC; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC; pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = RT_UOFFSETOF(GDBJITSYMFILE, aDyn); pSymFile->aShdrs[i].sh_size = sizeof(pSymFile->aDyn); pSymFile->aShdrs[i].sh_link = iShStrTab; pSymFile->aShdrs[i].sh_info = 0; pSymFile->aShdrs[i].sh_addralign = 1; pSymFile->aShdrs[i].sh_entsize = sizeof(pSymFile->aDyn[0]); i++; # endif /* Section header: .text */ unsigned const iShText = i; pSymFile->aShdrs[i].sh_name = offStrTab; APPEND_STR(".text"); pSymFile->aShdrs[i].sh_type = SHT_PROGBITS; pSymFile->aShdrs[i].sh_flags = SHF_ALLOC | SHF_EXECINSTR; # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) || defined(IEMNATIVE_USE_GDB_JIT_ELF_RVAS) pSymFile->aShdrs[i].sh_offset = pSymFile->aShdrs[i].sh_addr = sizeof(GDBJITSYMFILE); # else pSymFile->aShdrs[i].sh_addr = (uintptr_t)(pSymFile + 1); pSymFile->aShdrs[i].sh_offset = 0; # endif pSymFile->aShdrs[i].sh_size = pExecMemAllocator->cbChunk - offSymFileInChunk - sizeof(GDBJITSYMFILE); pSymFile->aShdrs[i].sh_link = 0; pSymFile->aShdrs[i].sh_info = 0; pSymFile->aShdrs[i].sh_addralign = 1; pSymFile->aShdrs[i].sh_entsize = 0; i++; Assert(i == RT_ELEMENTS(pSymFile->aShdrs)); # if defined(IEMNATIVE_USE_GDB_JIT_ET_DYN) /* * The program headers: */ /* Everything in a single LOAD segment: */ i = 0; pSymFile->aPhdrs[i].p_type = PT_LOAD; pSymFile->aPhdrs[i].p_flags = PF_X | PF_R; pSymFile->aPhdrs[i].p_offset = pSymFile->aPhdrs[i].p_vaddr = pSymFile->aPhdrs[i].p_paddr = 0; pSymFile->aPhdrs[i].p_filesz /* Size of segment in file. */ = pSymFile->aPhdrs[i].p_memsz = pExecMemAllocator->cbChunk - offSymFileInChunk; pSymFile->aPhdrs[i].p_align = HOST_PAGE_SIZE; i++; /* The .dynamic segment. */ pSymFile->aPhdrs[i].p_type = PT_DYNAMIC; pSymFile->aPhdrs[i].p_flags = PF_R; pSymFile->aPhdrs[i].p_offset = pSymFile->aPhdrs[i].p_vaddr = pSymFile->aPhdrs[i].p_paddr = RT_UOFFSETOF(GDBJITSYMFILE, aDyn); pSymFile->aPhdrs[i].p_filesz /* Size of segment in file. */ = pSymFile->aPhdrs[i].p_memsz = sizeof(pSymFile->aDyn); pSymFile->aPhdrs[i].p_align = sizeof(pSymFile->aDyn[0].d_tag); i++; Assert(i == RT_ELEMENTS(pSymFile->aPhdrs)); /* * The dynamic section: */ i = 0; pSymFile->aDyn[i].d_tag = DT_SONAME; pSymFile->aDyn[i].d_un.d_val = offStrTab; APPEND_STR_FMT("iem-exec-chunk-%u-%u", pVCpu->idCpu, idxChunk); i++; pSymFile->aDyn[i].d_tag = DT_STRTAB; pSymFile->aDyn[i].d_un.d_ptr = RT_UOFFSETOF(GDBJITSYMFILE, szzStrTab); i++; pSymFile->aDyn[i].d_tag = DT_STRSZ; pSymFile->aDyn[i].d_un.d_val = sizeof(pSymFile->szzStrTab); i++; pSymFile->aDyn[i].d_tag = DT_SYMTAB; pSymFile->aDyn[i].d_un.d_ptr = RT_UOFFSETOF(GDBJITSYMFILE, aDynSyms); i++; pSymFile->aDyn[i].d_tag = DT_SYMENT; pSymFile->aDyn[i].d_un.d_val = sizeof(pSymFile->aDynSyms[0]); i++; pSymFile->aDyn[i].d_tag = DT_NULL; i++; Assert(i == RT_ELEMENTS(pSymFile->aDyn)); # endif /* IEMNATIVE_USE_GDB_JIT_ET_DYN */ /* * Symbol tables: */ /** @todo gdb doesn't seem to really like this ... */ i = 0; pSymFile->aSymbols[i].st_name = 0; pSymFile->aSymbols[i].st_shndx = SHN_UNDEF; pSymFile->aSymbols[i].st_value = 0; pSymFile->aSymbols[i].st_size = 0; pSymFile->aSymbols[i].st_info = ELF64_ST_INFO(STB_LOCAL, STT_NOTYPE); pSymFile->aSymbols[i].st_other = 0 /* STV_DEFAULT */; # ifdef IEMNATIVE_USE_GDB_JIT_ET_DYN pSymFile->aDynSyms[0] = pSymFile->aSymbols[i]; # endif i++; pSymFile->aSymbols[i].st_name = 0; pSymFile->aSymbols[i].st_shndx = SHN_ABS; pSymFile->aSymbols[i].st_value = 0; pSymFile->aSymbols[i].st_size = 0; pSymFile->aSymbols[i].st_info = ELF64_ST_INFO(STB_LOCAL, STT_FILE); pSymFile->aSymbols[i].st_other = 0 /* STV_DEFAULT */; i++; pSymFile->aSymbols[i].st_name = offStrTab; APPEND_STR_FMT("iem_exec_chunk_%u_%u", pVCpu->idCpu, idxChunk); # if 0 pSymFile->aSymbols[i].st_shndx = iShText; pSymFile->aSymbols[i].st_value = 0; # else pSymFile->aSymbols[i].st_shndx = SHN_ABS; pSymFile->aSymbols[i].st_value = (uintptr_t)(pSymFile + 1); # endif pSymFile->aSymbols[i].st_size = pSymFile->aShdrs[iShText].sh_size; pSymFile->aSymbols[i].st_info = ELF64_ST_INFO(STB_GLOBAL, STT_FUNC); pSymFile->aSymbols[i].st_other = 0 /* STV_DEFAULT */; # ifdef IEMNATIVE_USE_GDB_JIT_ET_DYN pSymFile->aDynSyms[1] = pSymFile->aSymbols[i]; pSymFile->aDynSyms[1].st_value = (uintptr_t)(pSymFile + 1); # endif i++; Assert(i == RT_ELEMENTS(pSymFile->aSymbols)); Assert(offStrTab < sizeof(pSymFile->szzStrTab)); /* * The GDB JIT entry and informing GDB. */ pEhFrame->GdbJitEntry.pbSymFile = (uint8_t *)pSymFile; # if 1 pEhFrame->GdbJitEntry.cbSymFile = pExecMemAllocator->cbChunk - ((uintptr_t)pSymFile - (uintptr_t)pvChunk); # else pEhFrame->GdbJitEntry.cbSymFile = sizeof(GDBJITSYMFILE); # endif RTOnce(&g_IemNativeGdbJitOnce, iemNativeGdbJitInitOnce, NULL); RTCritSectEnter(&g_IemNativeGdbJitLock); pEhFrame->GdbJitEntry.pNext = NULL; pEhFrame->GdbJitEntry.pPrev = __jit_debug_descriptor.pTail; if (__jit_debug_descriptor.pTail) __jit_debug_descriptor.pTail->pNext = &pEhFrame->GdbJitEntry; else __jit_debug_descriptor.pHead = &pEhFrame->GdbJitEntry; __jit_debug_descriptor.pTail = &pEhFrame->GdbJitEntry; __jit_debug_descriptor.pRelevant = &pEhFrame->GdbJitEntry; /* Notify GDB: */ __jit_debug_descriptor.enmAction = kGdbJitaction_Register; __jit_debug_register_code(); __jit_debug_descriptor.enmAction = kGdbJitaction_NoAction; RTCritSectLeave(&g_IemNativeGdbJitLock); # else /* !IEMNATIVE_USE_GDB_JIT */ RT_NOREF(pVCpu); # endif /* !IEMNATIVE_USE_GDB_JIT */ return VINF_SUCCESS; } # endif /* !RT_OS_WINDOWS */ #endif /* IN_RING3 */ /** * Adds another chunk to the executable memory allocator. * * This is used by the init code for the initial allocation and later by the * regular allocator function when it's out of memory. */ static int iemExecMemAllocatorGrow(PVMCPUCC pVCpu, PIEMEXECMEMALLOCATOR pExecMemAllocator) { /* Check that we've room for growth. */ uint32_t const idxChunk = pExecMemAllocator->cChunks; AssertLogRelReturn(idxChunk < pExecMemAllocator->cMaxChunks, VERR_OUT_OF_RESOURCES); /* Allocate a chunk. */ #ifdef RT_OS_DARWIN void *pvChunk = RTMemPageAllocEx(pExecMemAllocator->cbChunk, 0); #else void *pvChunk = RTMemPageAllocEx(pExecMemAllocator->cbChunk, RTMEMPAGEALLOC_F_EXECUTABLE); #endif AssertLogRelReturn(pvChunk, VERR_NO_EXEC_MEMORY); #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR int rc = VINF_SUCCESS; #else /* Initialize the heap for the chunk. */ RTHEAPSIMPLE hHeap = NIL_RTHEAPSIMPLE; int rc = RTHeapSimpleInit(&hHeap, pvChunk, pExecMemAllocator->cbChunk); AssertRC(rc); if (RT_SUCCESS(rc)) { /* * We want the memory to be aligned on 64 byte, so the first time thru * here we do some exploratory allocations to see how we can achieve this. * On subsequent runs we only make an initial adjustment allocation, if * necessary. * * Since we own the heap implementation, we know that the internal block * header is 32 bytes in size for 64-bit systems (see RTHEAPSIMPLEBLOCK), * so all we need to wrt allocation size adjustments is to add 32 bytes * to the size, align up by 64 bytes, and subtract 32 bytes. * * The heap anchor block is 8 * sizeof(void *) (see RTHEAPSIMPLEINTERNAL), * which mean 64 bytes on a 64-bit system, so we need to make a 64 byte * allocation to force subsequent allocations to return 64 byte aligned * user areas. */ if (!pExecMemAllocator->cbHeapBlockHdr) { pExecMemAllocator->cbHeapBlockHdr = sizeof(void *) * 4; /* See RTHEAPSIMPLEBLOCK. */ pExecMemAllocator->cbHeapAlignTweak = 64; pExecMemAllocator->pvAlignTweak = RTHeapSimpleAlloc(hHeap, pExecMemAllocator->cbHeapAlignTweak, 32 /*cbAlignment*/); AssertStmt(pExecMemAllocator->pvAlignTweak, rc = VERR_INTERNAL_ERROR_2); void *pvTest1 = RTHeapSimpleAlloc(hHeap, RT_ALIGN_32(256 + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr, 32 /*cbAlignment*/); AssertStmt(pvTest1, rc = VERR_INTERNAL_ERROR_2); AssertStmt(!((uintptr_t)pvTest1 & 63), rc = VERR_INTERNAL_ERROR_3); void *pvTest2 = RTHeapSimpleAlloc(hHeap, RT_ALIGN_32(687 + pExecMemAllocator->cbHeapBlockHdr, 64) - pExecMemAllocator->cbHeapBlockHdr, 32 /*cbAlignment*/); AssertStmt(pvTest2, rc = VERR_INTERNAL_ERROR_2); AssertStmt(!((uintptr_t)pvTest2 & 63), rc = VERR_INTERNAL_ERROR_3); RTHeapSimpleFree(hHeap, pvTest2); RTHeapSimpleFree(hHeap, pvTest1); } else { pExecMemAllocator->pvAlignTweak = RTHeapSimpleAlloc(hHeap, pExecMemAllocator->cbHeapAlignTweak, 32 /*cbAlignment*/); AssertStmt(pExecMemAllocator->pvAlignTweak, rc = VERR_INTERNAL_ERROR_4); } if (RT_SUCCESS(rc)) #endif /* !IEMEXECMEM_USE_ALT_SUB_ALLOCATOR */ { /* * Add the chunk. * * This must be done before the unwind init so windows can allocate * memory from the chunk when using the alternative sub-allocator. */ pExecMemAllocator->aChunks[idxChunk].pvChunk = pvChunk; #ifdef IN_RING3 pExecMemAllocator->aChunks[idxChunk].pvUnwindInfo = NULL; #endif #ifndef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR pExecMemAllocator->aChunks[idxChunk].hHeap = hHeap; #else pExecMemAllocator->aChunks[idxChunk].cFreeUnits = pExecMemAllocator->cUnitsPerChunk; pExecMemAllocator->aChunks[idxChunk].idxFreeHint = 0; memset(&pExecMemAllocator->pbmAlloc[pExecMemAllocator->cBitmapElementsPerChunk * idxChunk], 0, sizeof(pExecMemAllocator->pbmAlloc[0]) * pExecMemAllocator->cBitmapElementsPerChunk); #endif pExecMemAllocator->cChunks = idxChunk + 1; pExecMemAllocator->idxChunkHint = idxChunk; #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR pExecMemAllocator->cbTotal += pExecMemAllocator->cbChunk; pExecMemAllocator->cbFree += pExecMemAllocator->cbChunk; #else size_t const cbFree = RTHeapSimpleGetFreeSize(hHeap); pExecMemAllocator->cbTotal += cbFree; pExecMemAllocator->cbFree += cbFree; #endif #ifdef IN_RING3 /* * Initialize the unwind information (this cannot really fail atm). * (This sets pvUnwindInfo.) */ rc = iemExecMemAllocatorInitAndRegisterUnwindInfoForChunk(pVCpu, pExecMemAllocator, pvChunk, idxChunk); if (RT_SUCCESS(rc)) #endif { return VINF_SUCCESS; } #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR /* Just in case the impossible happens, undo the above up: */ pExecMemAllocator->cbTotal -= pExecMemAllocator->cbChunk; pExecMemAllocator->cbFree -= pExecMemAllocator->aChunks[idxChunk].cFreeUnits << IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT; pExecMemAllocator->cChunks = idxChunk; memset(&pExecMemAllocator->pbmAlloc[pExecMemAllocator->cBitmapElementsPerChunk * idxChunk], 0xff, sizeof(pExecMemAllocator->pbmAlloc[0]) * pExecMemAllocator->cBitmapElementsPerChunk); pExecMemAllocator->aChunks[idxChunk].pvChunk = NULL; pExecMemAllocator->aChunks[idxChunk].cFreeUnits = 0; #endif } #ifndef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR } #endif RTMemPageFree(pvChunk, pExecMemAllocator->cbChunk); RT_NOREF(pVCpu); return rc; } /** * Initializes the executable memory allocator for native recompilation on the * calling EMT. * * @returns VBox status code. * @param pVCpu The cross context virtual CPU structure of the calling * thread. * @param cbMax The max size of the allocator. * @param cbInitial The initial allocator size. * @param cbChunk The chunk size, 0 or UINT32_MAX for default (@a cbMax * dependent). */ int iemExecMemAllocatorInit(PVMCPU pVCpu, uint64_t cbMax, uint64_t cbInitial, uint32_t cbChunk) { /* * Validate input. */ AssertLogRelMsgReturn(cbMax >= _1M && cbMax <= _4G+_4G, ("cbMax=%RU64 (%RX64)\n", cbMax, cbMax), VERR_OUT_OF_RANGE); AssertReturn(cbInitial <= cbMax, VERR_OUT_OF_RANGE); AssertLogRelMsgReturn( cbChunk != UINT32_MAX || cbChunk == 0 || ( RT_IS_POWER_OF_TWO(cbChunk) && cbChunk >= _1M && cbChunk <= _256M && cbChunk <= cbMax), ("cbChunk=%RU32 (%RX32) cbMax=%RU64\n", cbChunk, cbChunk, cbMax), VERR_OUT_OF_RANGE); /* * Adjust/figure out the chunk size. */ if (cbChunk == 0 || cbChunk == UINT32_MAX) { if (cbMax >= _256M) cbChunk = _64M; else { if (cbMax < _16M) cbChunk = cbMax >= _4M ? _4M : (uint32_t)cbMax; else cbChunk = (uint32_t)cbMax / 4; if (!RT_IS_POWER_OF_TWO(cbChunk)) cbChunk = RT_BIT_32(ASMBitLastSetU32(cbChunk)); } } if (cbChunk > cbMax) cbMax = cbChunk; else cbMax = (cbMax - 1 + cbChunk) / cbChunk * cbChunk; uint32_t const cMaxChunks = (uint32_t)(cbMax / cbChunk); AssertLogRelReturn((uint64_t)cMaxChunks * cbChunk == cbMax, VERR_INTERNAL_ERROR_3); /* * Allocate and initialize the allocatore instance. */ size_t cbNeeded = RT_UOFFSETOF_DYN(IEMEXECMEMALLOCATOR, aChunks[cMaxChunks]); #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR size_t const offBitmaps = RT_ALIGN_Z(cbNeeded, RT_CACHELINE_SIZE); size_t const cbBitmap = cbChunk >> (IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT + 3); cbNeeded += cbBitmap * cMaxChunks; AssertCompile(IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT <= 10); Assert(cbChunk > RT_BIT_32(IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT + 3)); #endif #if defined(IN_RING3) && !defined(RT_OS_WINDOWS) size_t const offEhFrames = RT_ALIGN_Z(cbNeeded, RT_CACHELINE_SIZE); cbNeeded += sizeof(IEMEXECMEMCHUNKEHFRAME) * cMaxChunks; #endif PIEMEXECMEMALLOCATOR pExecMemAllocator = (PIEMEXECMEMALLOCATOR)RTMemAllocZ(cbNeeded); AssertLogRelMsgReturn(pExecMemAllocator, ("cbNeeded=%zx cMaxChunks=%#x cbChunk=%#x\n", cbNeeded, cMaxChunks, cbChunk), VERR_NO_MEMORY); pExecMemAllocator->uMagic = IEMEXECMEMALLOCATOR_MAGIC; pExecMemAllocator->cbChunk = cbChunk; pExecMemAllocator->cMaxChunks = cMaxChunks; pExecMemAllocator->cChunks = 0; pExecMemAllocator->idxChunkHint = 0; pExecMemAllocator->cAllocations = 0; pExecMemAllocator->cbTotal = 0; pExecMemAllocator->cbFree = 0; pExecMemAllocator->cbAllocated = 0; #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR pExecMemAllocator->pbmAlloc = (uint64_t *)((uintptr_t)pExecMemAllocator + offBitmaps); pExecMemAllocator->cUnitsPerChunk = cbChunk >> IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT; pExecMemAllocator->cBitmapElementsPerChunk = cbChunk >> (IEMEXECMEM_ALT_SUB_ALLOC_UNIT_SHIFT + 6); memset(pExecMemAllocator->pbmAlloc, 0xff, cbBitmap); /* Mark everything as allocated. Clear when chunks are added. */ #endif #if defined(IN_RING3) && !defined(RT_OS_WINDOWS) pExecMemAllocator->paEhFrames = (PIEMEXECMEMCHUNKEHFRAME)((uintptr_t)pExecMemAllocator + offEhFrames); #endif for (uint32_t i = 0; i < cMaxChunks; i++) { #ifdef IEMEXECMEM_USE_ALT_SUB_ALLOCATOR pExecMemAllocator->aChunks[i].cFreeUnits = 0; pExecMemAllocator->aChunks[i].idxFreeHint = 0; #else pExecMemAllocator->aChunks[i].hHeap = NIL_RTHEAPSIMPLE; #endif pExecMemAllocator->aChunks[i].pvChunk = NULL; #ifdef IN_RING0 pExecMemAllocator->aChunks[i].hMemObj = NIL_RTR0MEMOBJ; #else pExecMemAllocator->aChunks[i].pvUnwindInfo = NULL; #endif } pVCpu->iem.s.pExecMemAllocatorR3 = pExecMemAllocator; /* * Do the initial allocations. */ while (cbInitial < (uint64_t)pExecMemAllocator->cChunks * pExecMemAllocator->cbChunk) { int rc = iemExecMemAllocatorGrow(pVCpu, pExecMemAllocator); AssertLogRelRCReturn(rc, rc); } pExecMemAllocator->idxChunkHint = 0; return VINF_SUCCESS; } /********************************************************************************************************************************* * Native Recompilation * *********************************************************************************************************************************/ /** * Used by TB code when encountering a non-zero status or rcPassUp after a call. */ IEM_DECL_IMPL_DEF(int, iemNativeHlpExecStatusCodeFiddling,(PVMCPUCC pVCpu, int rc, uint8_t idxInstr)) { pVCpu->iem.s.cInstructions += idxInstr; return VBOXSTRICTRC_VAL(iemExecStatusCodeFiddling(pVCpu, rc == VINF_IEM_REEXEC_BREAK ? VINF_SUCCESS : rc)); } /** * Used by TB code when it wants to raise a \#GP(0). */ IEM_DECL_IMPL_DEF(int, iemNativeHlpExecRaiseGp0,(PVMCPUCC pVCpu, uint8_t idxInstr)) { pVCpu->iem.s.cInstructions += idxInstr; iemRaiseGeneralProtectionFault0Jmp(pVCpu); #ifndef _MSC_VER return VINF_IEM_RAISED_XCPT; /* not reached */ #endif } /** * Reinitializes the native recompiler state. * * Called before starting a new recompile job. */ static PIEMRECOMPILERSTATE iemNativeReInit(PIEMRECOMPILERSTATE pReNative, PCIEMTB pTb) { pReNative->cLabels = 0; pReNative->bmLabelTypes = 0; pReNative->cFixups = 0; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO pReNative->pDbgInfo->cEntries = 0; #endif pReNative->pTbOrg = pTb; pReNative->cCondDepth = 0; pReNative->uCondSeqNo = 0; pReNative->uCheckIrqSeqNo = 0; pReNative->Core.bmHstRegs = IEMNATIVE_REG_FIXED_MASK #if IEMNATIVE_HST_GREG_COUNT < 32 | ~(RT_BIT(IEMNATIVE_HST_GREG_COUNT) - 1U) #endif ; pReNative->Core.bmHstRegsWithGstShadow = 0; pReNative->Core.bmGstRegShadows = 0; pReNative->Core.bmVars = 0; pReNative->Core.bmStack = 0; AssertCompile(sizeof(pReNative->Core.bmStack) * 8 == IEMNATIVE_FRAME_VAR_SLOTS); /* Must set reserved slots to 1 otherwise. */ pReNative->Core.u64ArgVars = UINT64_MAX; /* Full host register reinit: */ for (unsigned i = 0; i < RT_ELEMENTS(pReNative->Core.aHstRegs); i++) { pReNative->Core.aHstRegs[i].fGstRegShadows = 0; pReNative->Core.aHstRegs[i].enmWhat = kIemNativeWhat_Invalid; pReNative->Core.aHstRegs[i].idxVar = UINT8_MAX; } uint32_t fRegs = IEMNATIVE_REG_FIXED_MASK & ~( RT_BIT_32(IEMNATIVE_REG_FIXED_PVMCPU) #ifdef IEMNATIVE_REG_FIXED_PCPUMCTX | RT_BIT_32(IEMNATIVE_REG_FIXED_PCPUMCTX) #endif #ifdef IEMNATIVE_REG_FIXED_PCPUMCTX | RT_BIT_32(IEMNATIVE_REG_FIXED_TMP0) #endif ); for (uint32_t idxReg = ASMBitFirstSetU32(fRegs) - 1; fRegs != 0; idxReg = ASMBitFirstSetU32(fRegs) - 1) { fRegs &= ~RT_BIT_32(idxReg); pReNative->Core.aHstRegs[IEMNATIVE_REG_FIXED_PVMCPU].enmWhat = kIemNativeWhat_FixedReserved; } pReNative->Core.aHstRegs[IEMNATIVE_REG_FIXED_PVMCPU].enmWhat = kIemNativeWhat_pVCpuFixed; #ifdef IEMNATIVE_REG_FIXED_PCPUMCTX pReNative->Core.aHstRegs[IEMNATIVE_REG_FIXED_PCPUMCTX].enmWhat = kIemNativeWhat_pCtxFixed; #endif #ifdef IEMNATIVE_REG_FIXED_TMP0 pReNative->Core.aHstRegs[IEMNATIVE_REG_FIXED_TMP0].enmWhat = kIemNativeWhat_FixedTmp; #endif return pReNative; } /** * Allocates and initializes the native recompiler state. * * This is called the first time an EMT wants to recompile something. * * @returns Pointer to the new recompiler state. * @param pVCpu The cross context virtual CPU structure of the calling * thread. * @param pTb The TB that's about to be recompiled. * @thread EMT(pVCpu) */ static PIEMRECOMPILERSTATE iemNativeInit(PVMCPUCC pVCpu, PCIEMTB pTb) { VMCPU_ASSERT_EMT(pVCpu); PIEMRECOMPILERSTATE pReNative = (PIEMRECOMPILERSTATE)RTMemAllocZ(sizeof(*pReNative)); AssertReturn(pReNative, NULL); /* * Try allocate all the buffers and stuff we need. */ pReNative->pInstrBuf = (PIEMNATIVEINSTR)RTMemAllocZ(_64K); pReNative->paLabels = (PIEMNATIVELABEL)RTMemAllocZ(sizeof(IEMNATIVELABEL) * _8K); pReNative->paFixups = (PIEMNATIVEFIXUP)RTMemAllocZ(sizeof(IEMNATIVEFIXUP) * _16K); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO pReNative->pDbgInfo = (PIEMTBDBG)RTMemAllocZ(RT_UOFFSETOF_DYN(IEMTBDBG, aEntries[_16K])); #endif if (RT_LIKELY( pReNative->pInstrBuf && pReNative->paLabels && pReNative->paFixups) #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO && pReNative->pDbgInfo #endif ) { /* * Set the buffer & array sizes on success. */ pReNative->cInstrBufAlloc = _64K / sizeof(IEMNATIVEINSTR); pReNative->cLabelsAlloc = _8K; pReNative->cFixupsAlloc = _16K; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO pReNative->cDbgInfoAlloc = _16K; #endif /* * Done, just need to save it and reinit it. */ pVCpu->iem.s.pNativeRecompilerStateR3 = pReNative; return iemNativeReInit(pReNative, pTb); } /* * Failed. Cleanup and return. */ AssertFailed(); RTMemFree(pReNative->pInstrBuf); RTMemFree(pReNative->paLabels); RTMemFree(pReNative->paFixups); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO RTMemFree(pReNative->pDbgInfo); #endif RTMemFree(pReNative); return NULL; } /** * Creates a label * * If the label does not yet have a defined position, * call iemNativeLabelDefine() later to set it. * * @returns Label ID. Throws VBox status code on failure, so no need to check * the return value. * @param pReNative The native recompile state. * @param enmType The label type. * @param offWhere The instruction offset of the label. UINT32_MAX if the * label is not yet defined (default). * @param uData Data associated with the lable. Only applicable to * certain type of labels. Default is zero. */ DECL_HIDDEN_THROW(uint32_t) iemNativeLabelCreate(PIEMRECOMPILERSTATE pReNative, IEMNATIVELABELTYPE enmType, uint32_t offWhere /*= UINT32_MAX*/, uint16_t uData /*= 0*/) { /* * Locate existing label definition. * * This is only allowed for forward declarations where offWhere=UINT32_MAX * and uData is zero. */ PIEMNATIVELABEL paLabels = pReNative->paLabels; uint32_t const cLabels = pReNative->cLabels; if ( pReNative->bmLabelTypes & RT_BIT_64(enmType) #ifndef VBOX_STRICT && offWhere == UINT32_MAX && uData == 0 #endif ) { /** @todo Since this is only used for labels with uData = 0, just use a * lookup array? */ for (uint32_t i = 0; i < cLabels; i++) if ( paLabels[i].enmType == enmType && paLabels[i].uData == uData) { #ifdef VBOX_STRICT AssertStmt(uData == 0, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_1)); AssertStmt(offWhere == UINT32_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_1)); #endif AssertStmt(paLabels[i].off == UINT32_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_2)); return i; } } /* * Make sure we've got room for another label. */ if (RT_LIKELY(cLabels < pReNative->cLabelsAlloc)) { /* likely */ } else { uint32_t cNew = pReNative->cLabelsAlloc; AssertStmt(cNew, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_3)); AssertStmt(cLabels == cNew, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_3)); cNew *= 2; AssertStmt(cNew <= _64K, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_TOO_MANY)); /* IEMNATIVEFIXUP::idxLabel type restrict this */ paLabels = (PIEMNATIVELABEL)RTMemRealloc(paLabels, cNew * sizeof(paLabels[0])); AssertStmt(paLabels, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_OUT_OF_MEMORY)); pReNative->paLabels = paLabels; pReNative->cLabelsAlloc = cNew; } /* * Define a new label. */ paLabels[cLabels].off = offWhere; paLabels[cLabels].enmType = enmType; paLabels[cLabels].uData = uData; pReNative->cLabels = cLabels + 1; Assert((unsigned)enmType < 64); pReNative->bmLabelTypes |= RT_BIT_64(enmType); if (offWhere != UINT32_MAX) { #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO iemNativeDbgInfoAddNativeOffset(pReNative, offWhere); iemNativeDbgInfoAddLabel(pReNative, enmType, uData); #endif } return cLabels; } /** * Defines the location of an existing label. * * @param pReNative The native recompile state. * @param idxLabel The label to define. * @param offWhere The position. */ DECL_HIDDEN_THROW(void) iemNativeLabelDefine(PIEMRECOMPILERSTATE pReNative, uint32_t idxLabel, uint32_t offWhere) { AssertStmt(idxLabel < pReNative->cLabels, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_4)); PIEMNATIVELABEL const pLabel = &pReNative->paLabels[idxLabel]; AssertStmt(pLabel->off == UINT32_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_5)); pLabel->off = offWhere; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO iemNativeDbgInfoAddNativeOffset(pReNative, offWhere); iemNativeDbgInfoAddLabel(pReNative, (IEMNATIVELABELTYPE)pLabel->enmType, pLabel->uData); #endif } /** * Looks up a lable. * * @returns Label ID if found, UINT32_MAX if not. */ static uint32_t iemNativeLabelFind(PIEMRECOMPILERSTATE pReNative, IEMNATIVELABELTYPE enmType, uint32_t offWhere = UINT32_MAX, uint16_t uData = 0) RT_NOEXCEPT { Assert((unsigned)enmType < 64); if (RT_BIT_64(enmType) & pReNative->bmLabelTypes) { PIEMNATIVELABEL paLabels = pReNative->paLabels; uint32_t const cLabels = pReNative->cLabels; for (uint32_t i = 0; i < cLabels; i++) if ( paLabels[i].enmType == enmType && paLabels[i].uData == uData && ( paLabels[i].off == offWhere || offWhere == UINT32_MAX || paLabels[i].off == UINT32_MAX)) return i; } return UINT32_MAX; } /** * Adds a fixup. * * @throws VBox status code (int) on failure. * @param pReNative The native recompile state. * @param offWhere The instruction offset of the fixup location. * @param idxLabel The target label ID for the fixup. * @param enmType The fixup type. * @param offAddend Fixup addend if applicable to the type. Default is 0. */ DECL_HIDDEN_THROW(void) iemNativeAddFixup(PIEMRECOMPILERSTATE pReNative, uint32_t offWhere, uint32_t idxLabel, IEMNATIVEFIXUPTYPE enmType, int8_t offAddend /*= 0*/) { Assert(idxLabel <= UINT16_MAX); Assert((unsigned)enmType <= UINT8_MAX); /* * Make sure we've room. */ PIEMNATIVEFIXUP paFixups = pReNative->paFixups; uint32_t const cFixups = pReNative->cFixups; if (RT_LIKELY(cFixups < pReNative->cFixupsAlloc)) { /* likely */ } else { uint32_t cNew = pReNative->cFixupsAlloc; AssertStmt(cNew, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_FIXUP_IPE_1)); AssertStmt(cFixups == cNew, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_FIXUP_IPE_1)); cNew *= 2; AssertStmt(cNew <= _128K, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_FIXUP_TOO_MANY)); paFixups = (PIEMNATIVEFIXUP)RTMemRealloc(paFixups, cNew * sizeof(paFixups[0])); AssertStmt(paFixups, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_FIXUP_OUT_OF_MEMORY)); pReNative->paFixups = paFixups; pReNative->cFixupsAlloc = cNew; } /* * Add the fixup. */ paFixups[cFixups].off = offWhere; paFixups[cFixups].idxLabel = (uint16_t)idxLabel; paFixups[cFixups].enmType = enmType; paFixups[cFixups].offAddend = offAddend; pReNative->cFixups = cFixups + 1; } /** * Slow code path for iemNativeInstrBufEnsure. */ DECL_HIDDEN_THROW(PIEMNATIVEINSTR) iemNativeInstrBufEnsureSlow(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t cInstrReq) { /* Double the buffer size till we meet the request. */ uint32_t cNew = pReNative->cInstrBufAlloc; AssertReturn(cNew > 0, NULL); do cNew *= 2; while (cNew < off + cInstrReq); uint32_t const cbNew = cNew * sizeof(IEMNATIVEINSTR); #ifdef RT_ARCH_ARM64 uint32_t const cbMaxInstrBuf = _1M; /* Limited by the branch instruction range (18+2 bits). */ #else uint32_t const cbMaxInstrBuf = _2M; #endif AssertStmt(cbNew <= cbMaxInstrBuf, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_INSTR_BUF_TOO_LARGE)); void *pvNew = RTMemRealloc(pReNative->pInstrBuf, cbNew); AssertStmt(pvNew, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_INSTR_BUF_OUT_OF_MEMORY)); pReNative->cInstrBufAlloc = cNew; return pReNative->pInstrBuf = (PIEMNATIVEINSTR)pvNew; } #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO /** * Grows the static debug info array used during recompilation. * * @returns Pointer to the new debug info block; throws VBox status code on * failure, so no need to check the return value. */ DECL_NO_INLINE(static, PIEMTBDBG) iemNativeDbgInfoGrow(PIEMRECOMPILERSTATE pReNative, PIEMTBDBG pDbgInfo) { uint32_t cNew = pReNative->cDbgInfoAlloc * 2; AssertStmt(cNew < _1M && cNew != 0, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_DBGINFO_IPE_1)); pDbgInfo = (PIEMTBDBG)RTMemRealloc(pDbgInfo, RT_UOFFSETOF_DYN(IEMTBDBG, aEntries[cNew])); AssertStmt(pDbgInfo, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_DBGINFO_OUT_OF_MEMORY)); pReNative->pDbgInfo = pDbgInfo; pReNative->cDbgInfoAlloc = cNew; return pDbgInfo; } /** * Adds a new debug info uninitialized entry, returning the pointer to it. */ DECL_INLINE_THROW(PIEMTBDBGENTRY) iemNativeDbgInfoAddNewEntry(PIEMRECOMPILERSTATE pReNative, PIEMTBDBG pDbgInfo) { if (RT_LIKELY(pDbgInfo->cEntries < pReNative->cDbgInfoAlloc)) { /* likely */ } else pDbgInfo = iemNativeDbgInfoGrow(pReNative, pDbgInfo); return &pDbgInfo->aEntries[pDbgInfo->cEntries++]; } /** * Debug Info: Adds a native offset record, if necessary. */ static void iemNativeDbgInfoAddNativeOffset(PIEMRECOMPILERSTATE pReNative, uint32_t off) { PIEMTBDBG pDbgInfo = pReNative->pDbgInfo; /* * Search backwards to see if we've got a similar record already. */ uint32_t idx = pDbgInfo->cEntries; uint32_t idxStop = idx > 8 ? idx - 8 : 0; while (idx-- > idxStop) if (pDbgInfo->aEntries[idx].Gen.uType == kIemTbDbgEntryType_NativeOffset) { if (pDbgInfo->aEntries[idx].NativeOffset.offNative == off) return; AssertStmt(pDbgInfo->aEntries[idx].NativeOffset.offNative < off, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_DBGINFO_IPE_2)); break; } /* * Add it. */ PIEMTBDBGENTRY const pEntry = iemNativeDbgInfoAddNewEntry(pReNative, pDbgInfo); pEntry->NativeOffset.uType = kIemTbDbgEntryType_NativeOffset; pEntry->NativeOffset.offNative = off; } /** * Debug Info: Record info about a label. */ static void iemNativeDbgInfoAddLabel(PIEMRECOMPILERSTATE pReNative, IEMNATIVELABELTYPE enmType, uint16_t uData) { PIEMTBDBGENTRY const pEntry = iemNativeDbgInfoAddNewEntry(pReNative, pReNative->pDbgInfo); pEntry->Label.uType = kIemTbDbgEntryType_Label; pEntry->Label.uUnused = 0; pEntry->Label.enmLabel = (uint8_t)enmType; pEntry->Label.uData = uData; } /** * Debug Info: Record info about a threaded call. */ static void iemNativeDbgInfoAddThreadedCall(PIEMRECOMPILERSTATE pReNative, IEMTHREADEDFUNCS enmCall, bool fRecompiled) { PIEMTBDBGENTRY const pEntry = iemNativeDbgInfoAddNewEntry(pReNative, pReNative->pDbgInfo); pEntry->ThreadedCall.uType = kIemTbDbgEntryType_ThreadedCall; pEntry->ThreadedCall.fRecompiled = fRecompiled; pEntry->ThreadedCall.uUnused = 0; pEntry->ThreadedCall.enmCall = (uint16_t)enmCall; } /** * Debug Info: Record info about a new guest instruction. */ static void iemNativeDbgInfoAddGuestInstruction(PIEMRECOMPILERSTATE pReNative, uint32_t fExec) { PIEMTBDBGENTRY const pEntry = iemNativeDbgInfoAddNewEntry(pReNative, pReNative->pDbgInfo); pEntry->GuestInstruction.uType = kIemTbDbgEntryType_GuestInstruction; pEntry->GuestInstruction.uUnused = 0; pEntry->GuestInstruction.fExec = fExec; } /** * Debug Info: Record info about guest register shadowing. */ static void iemNativeDbgInfoAddGuestRegShadowing(PIEMRECOMPILERSTATE pReNative, IEMNATIVEGSTREG enmGstReg, uint8_t idxHstReg = UINT8_MAX, uint8_t idxHstRegPrev = UINT8_MAX) { PIEMTBDBGENTRY const pEntry = iemNativeDbgInfoAddNewEntry(pReNative, pReNative->pDbgInfo); pEntry->GuestRegShadowing.uType = kIemTbDbgEntryType_GuestRegShadowing; pEntry->GuestRegShadowing.uUnused = 0; pEntry->GuestRegShadowing.idxGstReg = enmGstReg; pEntry->GuestRegShadowing.idxHstReg = idxHstReg; pEntry->GuestRegShadowing.idxHstRegPrev = idxHstRegPrev; } #endif /* IEMNATIVE_WITH_TB_DEBUG_INFO */ /********************************************************************************************************************************* * Register Allocator * *********************************************************************************************************************************/ /** * Register parameter indexes (indexed by argument number). */ DECL_HIDDEN_CONST(uint8_t) const g_aidxIemNativeCallRegs[] = { IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_CALL_ARG1_GREG, IEMNATIVE_CALL_ARG2_GREG, IEMNATIVE_CALL_ARG3_GREG, #if defined(IEMNATIVE_CALL_ARG4_GREG) IEMNATIVE_CALL_ARG4_GREG, # if defined(IEMNATIVE_CALL_ARG5_GREG) IEMNATIVE_CALL_ARG5_GREG, # if defined(IEMNATIVE_CALL_ARG6_GREG) IEMNATIVE_CALL_ARG6_GREG, # if defined(IEMNATIVE_CALL_ARG7_GREG) IEMNATIVE_CALL_ARG7_GREG, # endif # endif # endif #endif }; /** * Call register masks indexed by argument count. */ DECL_HIDDEN_CONST(uint32_t) const g_afIemNativeCallRegs[] = { 0, RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG), RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG), RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG), RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG3_GREG), #if defined(IEMNATIVE_CALL_ARG4_GREG) RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG3_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG4_GREG), # if defined(IEMNATIVE_CALL_ARG5_GREG) RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG3_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG4_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG5_GREG), # if defined(IEMNATIVE_CALL_ARG6_GREG) RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG3_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG4_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG5_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG6_GREG), # if defined(IEMNATIVE_CALL_ARG7_GREG) RT_BIT_32(IEMNATIVE_CALL_ARG0_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG1_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG2_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG3_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG4_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG5_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG6_GREG) | RT_BIT_32(IEMNATIVE_CALL_ARG7_GREG), # endif # endif # endif #endif }; #ifdef IEMNATIVE_FP_OFF_STACK_ARG0 /** * BP offset of the stack argument slots. * * This array is indexed by \#argument - IEMNATIVE_CALL_ARG_GREG_COUNT and has * IEMNATIVE_FRAME_STACK_ARG_COUNT entries. */ DECL_HIDDEN_CONST(int32_t) const g_aoffIemNativeCallStackArgBpDisp[] = { IEMNATIVE_FP_OFF_STACK_ARG0, # ifdef IEMNATIVE_FP_OFF_STACK_ARG1 IEMNATIVE_FP_OFF_STACK_ARG1, # endif # ifdef IEMNATIVE_FP_OFF_STACK_ARG2 IEMNATIVE_FP_OFF_STACK_ARG2, # endif # ifdef IEMNATIVE_FP_OFF_STACK_ARG3 IEMNATIVE_FP_OFF_STACK_ARG3, # endif }; AssertCompile(RT_ELEMENTS(g_aoffIemNativeCallStackArgBpDisp) == IEMNATIVE_FRAME_STACK_ARG_COUNT); #endif /* IEMNATIVE_FP_OFF_STACK_ARG0 */ /** * Info about shadowed guest register values. * @see IEMNATIVEGSTREG */ static struct { /** Offset in VMCPU. */ uint32_t off; /** The field size. */ uint8_t cb; /** Name (for logging). */ const char *pszName; } const g_aGstShadowInfo[] = { #define CPUMCTX_OFF_AND_SIZE(a_Reg) (uint32_t)RT_UOFFSETOF(VMCPU, cpum.GstCtx. a_Reg), RT_SIZEOFMEMB(VMCPU, cpum.GstCtx. a_Reg) /* [kIemNativeGstReg_GprFirst + X86_GREG_xAX] = */ { CPUMCTX_OFF_AND_SIZE(rax), "rax", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xCX] = */ { CPUMCTX_OFF_AND_SIZE(rcx), "rcx", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xDX] = */ { CPUMCTX_OFF_AND_SIZE(rdx), "rdx", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xBX] = */ { CPUMCTX_OFF_AND_SIZE(rbx), "rbx", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xSP] = */ { CPUMCTX_OFF_AND_SIZE(rsp), "rsp", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xBP] = */ { CPUMCTX_OFF_AND_SIZE(rbp), "rbp", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xSI] = */ { CPUMCTX_OFF_AND_SIZE(rsi), "rsi", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_xDI] = */ { CPUMCTX_OFF_AND_SIZE(rdi), "rdi", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x8 ] = */ { CPUMCTX_OFF_AND_SIZE(r8), "r8", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x9 ] = */ { CPUMCTX_OFF_AND_SIZE(r9), "r9", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x10] = */ { CPUMCTX_OFF_AND_SIZE(r10), "r10", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x11] = */ { CPUMCTX_OFF_AND_SIZE(r11), "r11", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x12] = */ { CPUMCTX_OFF_AND_SIZE(r12), "r12", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x13] = */ { CPUMCTX_OFF_AND_SIZE(r13), "r13", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x14] = */ { CPUMCTX_OFF_AND_SIZE(r14), "r14", }, /* [kIemNativeGstReg_GprFirst + X86_GREG_x15] = */ { CPUMCTX_OFF_AND_SIZE(r15), "r15", }, /* [kIemNativeGstReg_Pc] = */ { CPUMCTX_OFF_AND_SIZE(rip), "rip", }, /* [kIemNativeGstReg_EFlags] = */ { CPUMCTX_OFF_AND_SIZE(eflags), "eflags", }, /* [kIemNativeGstReg_SegSelFirst + 0] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[0].Sel), "es", }, /* [kIemNativeGstReg_SegSelFirst + 1] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[1].Sel), "cs", }, /* [kIemNativeGstReg_SegSelFirst + 2] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[2].Sel), "ss", }, /* [kIemNativeGstReg_SegSelFirst + 3] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[3].Sel), "ds", }, /* [kIemNativeGstReg_SegSelFirst + 4] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[4].Sel), "fs", }, /* [kIemNativeGstReg_SegSelFirst + 5] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[5].Sel), "gs", }, /* [kIemNativeGstReg_SegBaseFirst + 0] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[0].u64Base), "es_base", }, /* [kIemNativeGstReg_SegBaseFirst + 1] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[1].u64Base), "cs_base", }, /* [kIemNativeGstReg_SegBaseFirst + 2] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[2].u64Base), "ss_base", }, /* [kIemNativeGstReg_SegBaseFirst + 3] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[3].u64Base), "ds_base", }, /* [kIemNativeGstReg_SegBaseFirst + 4] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[4].u64Base), "fs_base", }, /* [kIemNativeGstReg_SegBaseFirst + 5] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[5].u64Base), "gs_base", }, /* [kIemNativeGstReg_SegLimitFirst + 0] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[0].u32Limit), "es_limit", }, /* [kIemNativeGstReg_SegLimitFirst + 1] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[1].u32Limit), "cs_limit", }, /* [kIemNativeGstReg_SegLimitFirst + 2] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[2].u32Limit), "ss_limit", }, /* [kIemNativeGstReg_SegLimitFirst + 3] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[3].u32Limit), "ds_limit", }, /* [kIemNativeGstReg_SegLimitFirst + 4] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[4].u32Limit), "fs_limit", }, /* [kIemNativeGstReg_SegLimitFirst + 5] = */ { CPUMCTX_OFF_AND_SIZE(aSRegs[5].u32Limit), "gs_limit", }, #undef CPUMCTX_OFF_AND_SIZE }; AssertCompile(RT_ELEMENTS(g_aGstShadowInfo) == kIemNativeGstReg_End); /** Host CPU general purpose register names. */ DECL_HIDDEN_CONST(const char * const) g_apszIemNativeHstRegNames[] = { #ifdef RT_ARCH_AMD64 "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" #elif RT_ARCH_ARM64 "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", "x24", "x25", "x26", "x27", "x28", "bp", "lr", "sp/xzr", #else # error "port me" #endif }; DECL_FORCE_INLINE(uint8_t) iemNativeRegMarkAllocated(PIEMRECOMPILERSTATE pReNative, unsigned idxReg, IEMNATIVEWHAT enmWhat, uint8_t idxVar = UINT8_MAX) RT_NOEXCEPT { pReNative->Core.bmHstRegs |= RT_BIT_32(idxReg); pReNative->Core.aHstRegs[idxReg].enmWhat = enmWhat; pReNative->Core.aHstRegs[idxReg].fGstRegShadows = 0; pReNative->Core.aHstRegs[idxReg].idxVar = idxVar; return (uint8_t)idxReg; } /** * Tries to locate a suitable register in the given register mask. * * This ASSUMES the caller has done the minimal/optimal allocation checks and * failed. * * @returns Host register number on success, returns UINT8_MAX on failure. */ static uint8_t iemNativeRegTryAllocFree(PIEMRECOMPILERSTATE pReNative, uint32_t fRegMask) { Assert(!(fRegMask & ~IEMNATIVE_HST_GREG_MASK)); uint32_t fRegs = ~pReNative->Core.bmHstRegs & fRegMask; if (fRegs) { /** @todo pick better here: */ unsigned const idxReg = ASMBitFirstSetU32(fRegs) - 1; Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows != 0); Assert( (pReNative->Core.aHstRegs[idxReg].fGstRegShadows & pReNative->Core.bmGstRegShadows) == pReNative->Core.aHstRegs[idxReg].fGstRegShadows); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxReg].fGstRegShadows; pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxReg); pReNative->Core.aHstRegs[idxReg].fGstRegShadows = 0; return idxReg; } return UINT8_MAX; } /** * Locate a register, possibly freeing one up. * * This ASSUMES the caller has done the minimal/optimal allocation checks and * failed. * * @returns Host register number on success. Returns UINT8_MAX if no registers * found, the caller is supposed to deal with this and raise a * allocation type specific status code (if desired). * * @throws VBox status code if we're run into trouble spilling a variable of * recording debug info. Does NOT throw anything if we're out of * registers, though. */ static uint8_t iemNativeRegAllocFindFree(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, bool fPreferVolatile, uint32_t fRegMask = IEMNATIVE_HST_GREG_MASK & ~IEMNATIVE_REG_FIXED_MASK) { Assert(!(fRegMask & ~IEMNATIVE_HST_GREG_MASK)); Assert(!(fRegMask & ~IEMNATIVE_REG_FIXED_MASK)); /* * Try a freed register that's shadowing a guest register */ uint32_t fRegs = ~pReNative->Core.bmHstRegs & fRegMask; if (fRegs) { unsigned const idxReg = (fPreferVolatile ? ASMBitFirstSetU32(fRegs) : ASMBitLastSetU32( fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK ? fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK: fRegs)) - 1; Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows != 0); Assert( (pReNative->Core.aHstRegs[idxReg].fGstRegShadows & pReNative->Core.bmGstRegShadows) == pReNative->Core.aHstRegs[idxReg].fGstRegShadows); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxReg].fGstRegShadows; pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxReg); pReNative->Core.aHstRegs[idxReg].fGstRegShadows = 0; return idxReg; } /* * Try free up a variable that's in a register. * * We do two rounds here, first evacuating variables we don't need to be * saved on the stack, then in the second round move things to the stack. */ for (uint32_t iLoop = 0; iLoop < 2; iLoop++) { uint32_t fVars = pReNative->Core.bmVars; while (fVars) { uint32_t const idxVar = ASMBitFirstSetU32(fVars) - 1; uint8_t const idxReg = pReNative->Core.aVars[idxVar].idxReg; if ( idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs) && (RT_BIT_32(idxReg) & fRegMask) && ( iLoop == 0 ? pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Stack : pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack)) { Assert(pReNative->Core.bmHstRegs & RT_BIT_32(idxReg)); Assert( (pReNative->Core.bmGstRegShadows & pReNative->Core.aHstRegs[idxReg].fGstRegShadows) == pReNative->Core.aHstRegs[idxReg].fGstRegShadows); Assert( RT_BOOL(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)) == RT_BOOL(pReNative->Core.aHstRegs[idxReg].fGstRegShadows)); if (pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack) { AssertStmt(pReNative->Core.aVars[idxVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_8)); *poff = iemNativeEmitStoreGprByBp(pReNative, *poff, pReNative->Core.aVars[idxVar].idxStackSlot * sizeof(uint64_t) - IEMNATIVE_FP_OFF_STACK_VARS, idxReg); } pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxReg].fGstRegShadows; pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxReg); pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxReg); return idxReg; } fVars &= ~RT_BIT_32(idxVar); } } return UINT8_MAX; } /** * Moves a variable to a different register or spills it onto the stack. * * This must be a stack variable (kIemNativeVarKind_Stack) because the other * kinds can easily be recreated if needed later. * * @returns The new code buffer position, UINT32_MAX on failure. * @param pReNative The native recompile state. * @param off The current code buffer position. * @param idxVar The variable index. * @param fForbiddenRegs Mask of the forbidden registers. Defaults to * call-volatile registers. */ static uint32_t iemNativeRegMoveOrSpillStackVar(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxVar, uint32_t fForbiddenRegs = IEMNATIVE_CALL_VOLATILE_GREG_MASK) { Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars)); Assert(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack); uint8_t const idxRegOld = pReNative->Core.aVars[idxVar].idxReg; Assert(idxRegOld < RT_ELEMENTS(pReNative->Core.aHstRegs)); Assert(pReNative->Core.bmHstRegs & RT_BIT_32(idxRegOld)); Assert(pReNative->Core.aHstRegs[idxRegOld].enmWhat == kIemNativeWhat_Var); Assert( (pReNative->Core.bmGstRegShadows & pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows) == pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows); Assert( RT_BOOL(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxRegOld)) == RT_BOOL(pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows)); /** @todo Add statistics on this.*/ /** @todo Implement basic variable liveness analysis (python) so variables * can be freed immediately once no longer used. This has the potential to * be trashing registers and stack for dead variables. */ /* * First try move it to a different register, as that's cheaper. */ fForbiddenRegs |= RT_BIT_32(idxRegOld); fForbiddenRegs |= IEMNATIVE_REG_FIXED_MASK; uint32_t fRegs = ~pReNative->Core.bmHstRegs & ~fForbiddenRegs; if (fRegs) { /* Avoid using shadow registers, if possible. */ if (fRegs & ~pReNative->Core.bmHstRegsWithGstShadow) fRegs &= ~pReNative->Core.bmHstRegsWithGstShadow; unsigned const idxRegNew = ASMBitFirstSetU32(fRegs) - 1; uint64_t fGstRegShadows = pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows; pReNative->Core.aHstRegs[idxRegNew].fGstRegShadows = fGstRegShadows; pReNative->Core.aHstRegs[idxRegNew].enmWhat = kIemNativeWhat_Var; pReNative->Core.aHstRegs[idxRegNew].idxVar = idxVar; if (fGstRegShadows) { pReNative->Core.bmHstRegsWithGstShadow |= RT_BIT_32(idxRegNew); while (fGstRegShadows) { unsigned const idxGstReg = ASMBitFirstSetU64(fGstRegShadows) - 1; fGstRegShadows &= ~RT_BIT_64(idxGstReg); Assert(pReNative->Core.aidxGstRegShadows[idxGstReg] == idxRegOld); pReNative->Core.aidxGstRegShadows[idxGstReg] = idxRegNew; } } pReNative->Core.aVars[idxVar].idxReg = (uint8_t)idxRegNew; pReNative->Core.bmHstRegs |= RT_BIT_32(idxRegNew); } /* * Otherwise we must spill the register onto the stack. */ else { AssertStmt(pReNative->Core.aVars[idxVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_7)); off = iemNativeEmitStoreGprByBp(pReNative, off, pReNative->Core.aVars[idxVar].idxStackSlot * sizeof(uint64_t) - IEMNATIVE_FP_OFF_STACK_VARS, idxRegOld); pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxRegOld); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows; } pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxRegOld); pReNative->Core.aHstRegs[idxRegOld].fGstRegShadows = 0; return off; } /** * Allocates a temporary host general purpose register. * * This may emit code to save register content onto the stack in order to free * up a register. * * @returns The host register number; throws VBox status code on failure, * so no need to check the return value. * @param pReNative The native recompile state. * @param poff Pointer to the variable with the code buffer position. * This will be update if we need to move a variable from * register to stack in order to satisfy the request. * @param fPreferVolatile Wheter to prefer volatile over non-volatile * registers (@c true, default) or the other way around * (@c false, for iemNativeRegAllocTmpForGuestReg()). */ DECL_HIDDEN_THROW(uint8_t) iemNativeRegAllocTmp(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, bool fPreferVolatile /*= true*/) { /* * Try find a completely unused register, preferably a call-volatile one. */ uint8_t idxReg; uint32_t fRegs = ~pReNative->Core.bmHstRegs & ~pReNative->Core.bmHstRegsWithGstShadow & (~IEMNATIVE_REG_FIXED_MASK & IEMNATIVE_HST_GREG_MASK); if (fRegs) { if (fPreferVolatile) idxReg = (uint8_t)ASMBitFirstSetU32( fRegs & IEMNATIVE_CALL_VOLATILE_GREG_MASK ? fRegs & IEMNATIVE_CALL_VOLATILE_GREG_MASK : fRegs) - 1; else idxReg = (uint8_t)ASMBitFirstSetU32( fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK ? fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK : fRegs) - 1; Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows == 0); Assert(!(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg))); } else { idxReg = iemNativeRegAllocFindFree(pReNative, poff, fPreferVolatile); AssertStmt(idxReg != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_ALLOCATOR_NO_FREE_TMP)); } return iemNativeRegMarkAllocated(pReNative, idxReg, kIemNativeWhat_Tmp); } /** * Allocates a temporary register for loading an immediate value into. * * This will emit code to load the immediate, unless there happens to be an * unused register with the value already loaded. * * The caller will not modify the returned register, it must be considered * read-only. Free using iemNativeRegFreeTmpImm. * * @returns The host register number; throws VBox status code on failure, so no * need to check the return value. * @param pReNative The native recompile state. * @param poff Pointer to the variable with the code buffer position. * @param uImm The immediate value that the register must hold upon * return. * @param fPreferVolatile Wheter to prefer volatile over non-volatile * registers (@c true, default) or the other way around * (@c false). * * @note Reusing immediate values has not been implemented yet. */ DECL_HIDDEN_THROW(uint8_t) iemNativeRegAllocTmpImm(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, uint64_t uImm, bool fPreferVolatile /*= true*/) { uint8_t const idxReg = iemNativeRegAllocTmp(pReNative, poff, fPreferVolatile); *poff = iemNativeEmitLoadGprImm64(pReNative, *poff, idxReg, uImm); return idxReg; } /** * Marks host register @a idxHstReg as containing a shadow copy of guest * register @a enmGstReg. * * ASSUMES that caller has made sure @a enmGstReg is not associated with any * host register before calling. */ DECL_FORCE_INLINE(void) iemNativeRegMarkAsGstRegShadow(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg, IEMNATIVEGSTREG enmGstReg, uint32_t off) { Assert(!(pReNative->Core.bmGstRegShadows & RT_BIT_64(enmGstReg))); pReNative->Core.aidxGstRegShadows[enmGstReg] = idxHstReg; pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows = RT_BIT_64(enmGstReg); pReNative->Core.bmGstRegShadows |= RT_BIT_64(enmGstReg); pReNative->Core.bmHstRegsWithGstShadow |= RT_BIT_32(idxHstReg); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO iemNativeDbgInfoAddNativeOffset(pReNative, off); iemNativeDbgInfoAddGuestRegShadowing(pReNative, enmGstReg, idxHstReg); #else RT_NOREF(off); #endif } /** * Clear any guest register shadow claims from @a idxHstReg. * * The register does not need to be shadowing any guest registers. */ DECL_FORCE_INLINE(void) iemNativeRegClearGstRegShadowing(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg, uint32_t off) { Assert( (pReNative->Core.bmGstRegShadows & pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows) == pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows); Assert( RT_BOOL(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxHstReg)) == RT_BOOL(pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows)); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO uint64_t fGstRegs = pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows; if (fGstRegs) { iemNativeDbgInfoAddNativeOffset(pReNative, off); while (fGstRegs) { unsigned const iGstReg = ASMBitFirstSetU64(fGstRegs) - 1; fGstRegs &= ~RT_BIT_64(iGstReg); iemNativeDbgInfoAddGuestRegShadowing(pReNative, (IEMNATIVEGSTREG)iGstReg, UINT8_MAX, idxHstReg); } } #else RT_NOREF(off); #endif pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxHstReg); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows; pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows = 0; } /** * Transfers the guest register shadow claims of @a enmGstReg from @a idxRegFrom * to @a idxRegTo. */ DECL_FORCE_INLINE(void) iemNativeRegTransferGstRegShadowing(PIEMRECOMPILERSTATE pReNative, uint8_t idxRegFrom, uint8_t idxRegTo, IEMNATIVEGSTREG enmGstReg, uint32_t off) { Assert(pReNative->Core.aHstRegs[idxRegFrom].fGstRegShadows & RT_BIT_64(enmGstReg)); Assert( (pReNative->Core.bmGstRegShadows & pReNative->Core.aHstRegs[idxRegFrom].fGstRegShadows) == pReNative->Core.aHstRegs[idxRegFrom].fGstRegShadows); Assert( RT_BOOL(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxRegFrom)) == RT_BOOL(pReNative->Core.aHstRegs[idxRegFrom].fGstRegShadows)); pReNative->Core.aHstRegs[idxRegFrom].fGstRegShadows &= ~RT_BIT_64(enmGstReg); pReNative->Core.aHstRegs[idxRegTo].fGstRegShadows = RT_BIT_64(enmGstReg); pReNative->Core.aidxGstRegShadows[enmGstReg] = idxRegTo; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO iemNativeDbgInfoAddNativeOffset(pReNative, off); iemNativeDbgInfoAddGuestRegShadowing(pReNative, enmGstReg, idxRegTo, idxRegFrom); #else RT_NOREF(off); #endif } /** * Allocates a temporary host general purpose register for keeping a guest * register value. * * Since we may already have a register holding the guest register value, * code will be emitted to do the loading if that's not the case. Code may also * be emitted if we have to free up a register to satify the request. * * @returns The host register number; throws VBox status code on failure, so no * need to check the return value. * @param pReNative The native recompile state. * @param poff Pointer to the variable with the code buffer * position. This will be update if we need to move a * variable from register to stack in order to satisfy * the request. * @param enmGstReg The guest register that will is to be updated. * @param enmIntendedUse How the caller will be using the host register. * @sa iemNativeRegAllocTmpForGuestRegIfAlreadyPresent */ DECL_HIDDEN_THROW(uint8_t) iemNativeRegAllocTmpForGuestReg(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, IEMNATIVEGSTREG enmGstReg, IEMNATIVEGSTREGUSE enmIntendedUse) { Assert(enmGstReg < kIemNativeGstReg_End && g_aGstShadowInfo[enmGstReg].cb != 0); #ifdef LOG_ENABLED static const char * const s_pszIntendedUse[] = { "fetch", "update", "destructive calc" }; #endif /* * First check if the guest register value is already in a host register. */ if (pReNative->Core.bmGstRegShadows & RT_BIT_64(enmGstReg)) { uint8_t idxReg = pReNative->Core.aidxGstRegShadows[enmGstReg]; Assert(idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs)); Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows & RT_BIT_64(enmGstReg)); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)); if (!(pReNative->Core.bmHstRegs & RT_BIT_32(idxReg))) { /* * If the register will trash the guest shadow copy, try find a * completely unused register we can use instead. If that fails, * we need to disassociate the host reg from the guest reg. */ /** @todo would be nice to know if preserving the register is in any way helpful. */ if ( enmIntendedUse == kIemNativeGstRegUse_Calculation && ( ~pReNative->Core.bmHstRegs & ~pReNative->Core.bmHstRegsWithGstShadow & (~IEMNATIVE_REG_FIXED_MASK & IEMNATIVE_HST_GREG_MASK))) { uint8_t const idxRegNew = iemNativeRegAllocTmp(pReNative, poff); *poff = iemNativeEmitLoadGprFromGpr(pReNative, *poff, idxRegNew, idxReg); Log12(("iemNativeRegAllocTmpForGuestReg: Duplicated %s for guest %s into %s for destructive calc\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName, g_apszIemNativeHstRegNames[idxRegNew])); idxReg = idxRegNew; } else { pReNative->Core.bmHstRegs |= RT_BIT_32(idxReg); pReNative->Core.aHstRegs[idxReg].enmWhat = kIemNativeWhat_Tmp; pReNative->Core.aHstRegs[idxReg].idxVar = UINT8_MAX; if (enmIntendedUse != kIemNativeGstRegUse_Calculation) Log12(("iemNativeRegAllocTmpForGuestReg: Reusing %s for guest %s %s\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName, s_pszIntendedUse[enmIntendedUse])); else { iemNativeRegClearGstRegShadowing(pReNative, idxReg, *poff); Log12(("iemNativeRegAllocTmpForGuestReg: Grabbing %s for guest %s - destructive calc\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName)); } } } else { AssertMsg(enmIntendedUse != kIemNativeGstRegUse_ForUpdate, ("This shouldn't happen: idxReg=%d enmGstReg=%d\n", idxReg, enmGstReg)); /* * Allocate a new register, copy the value and, if updating, the * guest shadow copy assignment to the new register. */ /** @todo share register for readonly access. */ uint8_t const idxRegNew = iemNativeRegAllocTmp(pReNative, poff, enmIntendedUse == kIemNativeGstRegUse_Calculation); *poff = iemNativeEmitLoadGprFromGpr(pReNative, *poff, idxRegNew, idxReg); if (enmIntendedUse != kIemNativeGstRegUse_ForUpdate) Log12(("iemNativeRegAllocTmpForGuestReg: Duplicated %s for guest %s into %s for %s\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName, g_apszIemNativeHstRegNames[idxRegNew], s_pszIntendedUse[enmIntendedUse])); else { iemNativeRegTransferGstRegShadowing(pReNative, idxReg, idxRegNew, enmGstReg, *poff); Log12(("iemNativeRegAllocTmpForGuestReg: Moved %s for guest %s into %s for update\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName, g_apszIemNativeHstRegNames[idxRegNew])); } idxReg = idxRegNew; } #ifdef VBOX_STRICT /* Strict builds: Check that the value is correct. */ *poff = iemNativeEmitGuestRegValueCheck(pReNative, *poff, idxReg, enmGstReg); #endif return idxReg; } /* * Allocate a new register, load it with the guest value and designate it as a copy of the */ uint8_t const idxRegNew = iemNativeRegAllocTmp(pReNative, poff, enmIntendedUse == kIemNativeGstRegUse_Calculation); *poff = iemNativeEmitLoadGprWithGstShadowReg(pReNative, *poff, idxRegNew, enmGstReg); if (enmIntendedUse != kIemNativeGstRegUse_Calculation) iemNativeRegMarkAsGstRegShadow(pReNative, idxRegNew, enmGstReg, *poff); Log12(("iemNativeRegAllocTmpForGuestReg: Allocated %s for guest %s %s\n", g_apszIemNativeHstRegNames[idxRegNew], g_aGstShadowInfo[enmGstReg].pszName, s_pszIntendedUse[enmIntendedUse])); return idxRegNew; } /** * Allocates a temporary host general purpose register that already holds the * given guest register value. * * The use case for this function is places where the shadowing state cannot be * modified due to branching and such. This will fail if the we don't have a * current shadow copy handy or if it's incompatible. The only code that will * be emitted here is value checking code in strict builds. * * The intended use can only be readonly! * * @returns The host register number, UINT8_MAX if not present. * @param pReNative The native recompile state. * @param poff Pointer to the instruction buffer offset. * Will be updated in strict builds if a register is * found. * @param enmGstReg The guest register that will is to be updated. * @note In strict builds, this may throw instruction buffer growth failures. * Non-strict builds will not throw anything. * @sa iemNativeRegAllocTmpForGuestReg */ DECL_HIDDEN_THROW(uint8_t) iemNativeRegAllocTmpForGuestRegIfAlreadyPresent(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, IEMNATIVEGSTREG enmGstReg) { Assert(enmGstReg < kIemNativeGstReg_End && g_aGstShadowInfo[enmGstReg].cb != 0); /* * First check if the guest register value is already in a host register. */ if (pReNative->Core.bmGstRegShadows & RT_BIT_64(enmGstReg)) { uint8_t idxReg = pReNative->Core.aidxGstRegShadows[enmGstReg]; Assert(idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs)); Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows & RT_BIT_64(enmGstReg)); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)); if (!(pReNative->Core.bmHstRegs & RT_BIT_32(idxReg))) { /* * We only do readonly use here, so easy compared to the other * variant of this code. */ pReNative->Core.bmHstRegs |= RT_BIT_32(idxReg); pReNative->Core.aHstRegs[idxReg].enmWhat = kIemNativeWhat_Tmp; pReNative->Core.aHstRegs[idxReg].idxVar = UINT8_MAX; Log12(("iemNativeRegAllocTmpForGuestRegIfAlreadyPresent: Reusing %s for guest %s readonly\n", g_apszIemNativeHstRegNames[idxReg], g_aGstShadowInfo[enmGstReg].pszName)); #ifdef VBOX_STRICT /* Strict builds: Check that the value is correct. */ *poff = iemNativeEmitGuestRegValueCheck(pReNative, *poff, idxReg, enmGstReg); #else RT_NOREF(poff); #endif return idxReg; } } return UINT8_MAX; } DECL_HIDDEN_THROW(uint8_t) iemNativeRegAllocVar(PIEMRECOMPILERSTATE pReNative, uint32_t *poff, uint8_t idxVar); /** * Allocates argument registers for a function call. * * @returns New code buffer offset on success; throws VBox status code on failure, so no * need to check the return value. * @param pReNative The native recompile state. * @param off The current code buffer offset. * @param cArgs The number of arguments the function call takes. */ DECL_HIDDEN_THROW(uint32_t) iemNativeRegAllocArgs(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cArgs) { AssertStmt(cArgs <= IEMNATIVE_CALL_ARG_GREG_COUNT + IEMNATIVE_FRAME_STACK_ARG_COUNT, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_4)); Assert(RT_ELEMENTS(g_aidxIemNativeCallRegs) == IEMNATIVE_CALL_ARG_GREG_COUNT); Assert(RT_ELEMENTS(g_afIemNativeCallRegs) == IEMNATIVE_CALL_ARG_GREG_COUNT); if (cArgs > RT_ELEMENTS(g_aidxIemNativeCallRegs)) cArgs = RT_ELEMENTS(g_aidxIemNativeCallRegs); else if (cArgs == 0) return true; /* * Do we get luck and all register are free and not shadowing anything? */ if (((pReNative->Core.bmHstRegs | pReNative->Core.bmHstRegsWithGstShadow) & g_afIemNativeCallRegs[cArgs]) == 0) for (uint32_t i = 0; i < cArgs; i++) { uint8_t const idxReg = g_aidxIemNativeCallRegs[i]; pReNative->Core.aHstRegs[idxReg].enmWhat = kIemNativeWhat_Arg; pReNative->Core.aHstRegs[idxReg].idxVar = UINT8_MAX; Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows == 0); } /* * Okay, not lucky so we have to free up the registers. */ else for (uint32_t i = 0; i < cArgs; i++) { uint8_t const idxReg = g_aidxIemNativeCallRegs[i]; if (pReNative->Core.bmHstRegs & RT_BIT_32(idxReg)) { switch (pReNative->Core.aHstRegs[idxReg].enmWhat) { case kIemNativeWhat_Var: { uint8_t const idxVar = pReNative->Core.aHstRegs[idxReg].idxVar; AssertStmt(idxVar < RT_ELEMENTS(pReNative->Core.aVars), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_5)); Assert(pReNative->Core.aVars[idxVar].idxReg == idxReg); Assert(pReNative->Core.bmVars & RT_BIT_32(idxVar)); if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Stack) pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; else { off = iemNativeRegMoveOrSpillStackVar(pReNative, off, idxVar); Assert(!(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg))); } break; } case kIemNativeWhat_Tmp: case kIemNativeWhat_Arg: case kIemNativeWhat_rc: AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_5)); default: AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_6)); } } if (pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg)) { Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows != 0); Assert( (pReNative->Core.aHstRegs[idxReg].fGstRegShadows & pReNative->Core.bmGstRegShadows) == pReNative->Core.aHstRegs[idxReg].fGstRegShadows); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxReg].fGstRegShadows; pReNative->Core.aHstRegs[idxReg].fGstRegShadows = 0; } else Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows == 0); pReNative->Core.aHstRegs[idxReg].enmWhat = kIemNativeWhat_Arg; pReNative->Core.aHstRegs[idxReg].idxVar = UINT8_MAX; } pReNative->Core.bmHstRegs |= g_afIemNativeCallRegs[cArgs]; return true; } DECL_HIDDEN_THROW(uint8_t) iemNativeRegAssignRc(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg); #if 0 /** * Frees a register assignment of any type. * * @param pReNative The native recompile state. * @param idxHstReg The register to free. * * @note Does not update variables. */ DECLHIDDEN(void) iemNativeRegFree(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg) RT_NOEXCEPT { Assert(idxHstReg < RT_ELEMENTS(pReNative->Core.aHstRegs)); Assert(pReNative->Core.bmHstRegs & RT_BIT_32(idxHstReg)); Assert(!(IEMNATIVE_REG_FIXED_MASK & RT_BIT_32(idxHstReg))); Assert( pReNative->Core.aHstRegs[idxHstReg].enmWhat == kIemNativeWhat_Var || pReNative->Core.aHstRegs[idxHstReg].enmWhat == kIemNativeWhat_Tmp || pReNative->Core.aHstRegs[idxHstReg].enmWhat == kIemNativeWhat_Arg || pReNative->Core.aHstRegs[idxHstReg].enmWhat == kIemNativeWhat_rc); Assert( pReNative->Core.aHstRegs[idxHstReg].enmWhat != kIemNativeWhat_Var || pReNative->Core.aVars[pReNative->Core.aHstRegs[idxHstReg].idxVar].idxReg == UINT8_MAX || (pReNative->Core.bmVars & RT_BIT_32(pReNative->Core.aHstRegs[idxHstReg].idxVar))); Assert( (pReNative->Core.bmGstRegShadows & pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows) == pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows); Assert( RT_BOOL(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxHstReg)) == RT_BOOL(pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows)); pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxHstReg); /* no flushing, right: pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxHstReg); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows; pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows = 0; */ } #endif /** * Frees a temporary register. * * Any shadow copies of guest registers assigned to the host register will not * be flushed by this operation. */ DECLHIDDEN(void) iemNativeRegFreeTmp(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg) RT_NOEXCEPT { Assert(pReNative->Core.bmHstRegs & RT_BIT_32(idxHstReg)); Assert(pReNative->Core.aHstRegs[idxHstReg].enmWhat == kIemNativeWhat_Tmp); pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxHstReg); Log12(("iemNativeRegFreeTmp: %s (gst: %#RX64)\n", g_apszIemNativeHstRegNames[idxHstReg], pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows)); } /** * Frees a temporary immediate register. * * It is assumed that the call has not modified the register, so it still hold * the same value as when it was allocated via iemNativeRegAllocTmpImm(). */ DECLHIDDEN(void) iemNativeRegFreeTmpImm(PIEMRECOMPILERSTATE pReNative, uint8_t idxHstReg) RT_NOEXCEPT { iemNativeRegFreeTmp(pReNative, idxHstReg); } /** * Called right before emitting a call instruction to move anything important * out of call-volatile registers, free and flush the call-volatile registers, * optionally freeing argument variables. * * @returns New code buffer offset, UINT32_MAX on failure. * @param pReNative The native recompile state. * @param off The code buffer offset. * @param cArgs The number of arguments the function call takes. * It is presumed that the host register part of these have * been allocated as such already and won't need moving, * just freeing. */ DECL_HIDDEN_THROW(uint32_t) iemNativeRegMoveAndFreeAndFlushAtCall(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cArgs) { Assert(cArgs <= IEMNATIVE_CALL_MAX_ARG_COUNT); /* * Move anything important out of volatile registers. */ if (cArgs > RT_ELEMENTS(g_aidxIemNativeCallRegs)) cArgs = RT_ELEMENTS(g_aidxIemNativeCallRegs); uint32_t fRegsToMove = IEMNATIVE_CALL_VOLATILE_GREG_MASK #ifdef IEMNATIVE_REG_FIXED_TMP0 & ~RT_BIT_32(IEMNATIVE_REG_FIXED_TMP0) #endif & ~g_afIemNativeCallRegs[cArgs]; fRegsToMove &= pReNative->Core.bmHstRegs; if (!fRegsToMove) { /* likely */ } else while (fRegsToMove != 0) { unsigned const idxReg = ASMBitFirstSetU32(fRegsToMove) - 1; fRegsToMove &= ~RT_BIT_32(idxReg); switch (pReNative->Core.aHstRegs[idxReg].enmWhat) { case kIemNativeWhat_Var: { uint8_t const idxVar = pReNative->Core.aHstRegs[idxReg].idxVar; Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars)); Assert(pReNative->Core.bmVars & RT_BIT_32(idxVar)); Assert(pReNative->Core.aVars[idxVar].idxReg == idxReg); if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Stack) pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; else off = iemNativeRegMoveOrSpillStackVar(pReNative, off, idxVar); continue; } case kIemNativeWhat_Arg: AssertMsgFailed(("What?!?: %u\n", idxReg)); continue; case kIemNativeWhat_rc: case kIemNativeWhat_Tmp: AssertMsgFailed(("Missing free: %u\n", idxReg)); continue; case kIemNativeWhat_FixedTmp: case kIemNativeWhat_pVCpuFixed: case kIemNativeWhat_pCtxFixed: case kIemNativeWhat_FixedReserved: case kIemNativeWhat_Invalid: case kIemNativeWhat_End: AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_1)); } AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_2)); } /* * Do the actual freeing. */ pReNative->Core.bmHstRegs &= ~IEMNATIVE_CALL_VOLATILE_GREG_MASK; /* If there are guest register shadows in any call-volatile register, we have to clear the corrsponding guest register masks for each register. */ uint32_t fHstRegsWithGstShadow = pReNative->Core.bmHstRegsWithGstShadow & IEMNATIVE_CALL_VOLATILE_GREG_MASK; if (fHstRegsWithGstShadow) { pReNative->Core.bmHstRegsWithGstShadow &= ~fHstRegsWithGstShadow; do { unsigned const idxReg = ASMBitFirstSetU32(fHstRegsWithGstShadow) - 1; fHstRegsWithGstShadow = ~RT_BIT_32(idxReg); Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows != 0); pReNative->Core.bmGstRegShadows &= ~pReNative->Core.aHstRegs[idxReg].fGstRegShadows; pReNative->Core.aHstRegs[idxReg].fGstRegShadows = 0; } while (fHstRegsWithGstShadow != 0); } return off; } /** * Flushes a set of guest register shadow copies. * * This is usually done after calling a threaded function or a C-implementation * of an instruction. * * @param pReNative The native recompile state. * @param fGstRegs Set of guest registers to flush. */ DECLHIDDEN(void) iemNativeRegFlushGuestShadows(PIEMRECOMPILERSTATE pReNative, uint64_t fGstRegs) RT_NOEXCEPT { /* * Reduce the mask by what's currently shadowed */ fGstRegs &= pReNative->Core.bmGstRegShadows; if (fGstRegs) { pReNative->Core.bmGstRegShadows &= ~fGstRegs; if (pReNative->Core.bmGstRegShadows) { /* * Partial. */ do { unsigned const idxGstReg = ASMBitFirstSetU64(fGstRegs) - 1; uint8_t const idxHstReg = pReNative->Core.aidxGstRegShadows[idxGstReg]; Assert(idxHstReg < RT_ELEMENTS(pReNative->Core.aidxGstRegShadows)); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxHstReg)); Assert(pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows & RT_BIT_64(idxGstReg)); uint64_t const fInThisHstReg = (pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows & fGstRegs) | RT_BIT_64(idxGstReg); fGstRegs &= ~fInThisHstReg; pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows &= ~fInThisHstReg; if (!pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows) pReNative->Core.bmHstRegsWithGstShadow &= ~RT_BIT_32(idxHstReg); } while (fGstRegs != 0); } else { /* * Clear all. */ do { unsigned const idxGstReg = ASMBitFirstSetU64(fGstRegs) - 1; uint8_t const idxHstReg = pReNative->Core.aidxGstRegShadows[idxGstReg]; Assert(idxHstReg < RT_ELEMENTS(pReNative->Core.aidxGstRegShadows)); Assert(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxHstReg)); Assert(pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows & RT_BIT_64(idxGstReg)); fGstRegs &= ~(pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows | RT_BIT_64(idxGstReg)); pReNative->Core.aHstRegs[idxHstReg].fGstRegShadows = 0; } while (fGstRegs != 0); pReNative->Core.bmHstRegsWithGstShadow = 0; } } } /** * Flushes any delayed guest register writes. * * This must be called prior to calling CImpl functions and any helpers that use * the guest state (like raising exceptions) and such. * * This optimization has not yet been implemented. The first target would be * RIP updates, since these are the most common ones. */ DECL_HIDDEN_THROW(uint32_t) iemNativeRegFlushPendingWrites(PIEMRECOMPILERSTATE pReNative, uint32_t off) { RT_NOREF(pReNative, off); return off; } /********************************************************************************************************************************* * Code Emitters (larger snippets) * *********************************************************************************************************************************/ /** * Loads the guest shadow register @a enmGstReg into host reg @a idxHstReg, zero * extending to 64-bit width. * * @returns New code buffer offset on success, UINT32_MAX on failure. * @param pReNative . * @param off The current code buffer position. * @param idxHstReg The host register to load the guest register value into. * @param enmGstReg The guest register to load. * * @note This does not mark @a idxHstReg as having a shadow copy of @a enmGstReg, * that is something the caller needs to do if applicable. */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitLoadGprWithGstShadowReg(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxHstReg, IEMNATIVEGSTREG enmGstReg) { Assert((unsigned)enmGstReg < RT_ELEMENTS(g_aGstShadowInfo)); Assert(g_aGstShadowInfo[enmGstReg].cb != 0); switch (g_aGstShadowInfo[enmGstReg].cb) { case sizeof(uint64_t): return iemNativeEmitLoadGprFromVCpuU64(pReNative, off, idxHstReg, g_aGstShadowInfo[enmGstReg].off); case sizeof(uint32_t): return iemNativeEmitLoadGprFromVCpuU32(pReNative, off, idxHstReg, g_aGstShadowInfo[enmGstReg].off); case sizeof(uint16_t): return iemNativeEmitLoadGprFromVCpuU16(pReNative, off, idxHstReg, g_aGstShadowInfo[enmGstReg].off); #if 0 /* not present in the table. */ case sizeof(uint8_t): return iemNativeEmitLoadGprFromVCpuU8(pReNative, off, idxHstReg, g_aGstShadowInfo[enmGstReg].off); #endif default: AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IPE_NOT_REACHED_DEFAULT_CASE)); } } #ifdef VBOX_STRICT /** * Emitting code that checks that the content of register @a idxReg is the same * as what's in the guest register @a enmGstReg, resulting in a breakpoint * instruction if that's not the case. * * @note May of course trash IEMNATIVE_REG_FIXED_TMP0. * Trashes EFLAGS on AMD64. */ static uint32_t iemNativeEmitGuestRegValueCheck(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxReg, IEMNATIVEGSTREG enmGstReg) { # ifdef RT_ARCH_AMD64 uint8_t * const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 32); /* cmp reg, [mem] */ if (g_aGstShadowInfo[enmGstReg].cb == sizeof(uint8_t)) { if (idxReg >= 8) pbCodeBuf[off++] = X86_OP_REX_R; pbCodeBuf[off++] = 0x38; } else { if (g_aGstShadowInfo[enmGstReg].cb == sizeof(uint64_t)) pbCodeBuf[off++] = X86_OP_REX_W | (idxReg < 8 ? 0 : X86_OP_REX_R); else { if (g_aGstShadowInfo[enmGstReg].cb == sizeof(uint16_t)) pbCodeBuf[off++] = X86_OP_PRF_SIZE_OP; else AssertStmt(g_aGstShadowInfo[enmGstReg].cb == sizeof(uint32_t), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_LABEL_IPE_6)); if (idxReg >= 8) pbCodeBuf[off++] = X86_OP_REX_R; } pbCodeBuf[off++] = 0x39; } off = iemNativeEmitGprByVCpuDisp(pbCodeBuf, off, idxReg, g_aGstShadowInfo[enmGstReg].off); /* je/jz +1 */ pbCodeBuf[off++] = 0x74; pbCodeBuf[off++] = 0x01; /* int3 */ pbCodeBuf[off++] = 0xcc; /* For values smaller than the register size, we must check that the rest of the register is all zeros. */ if (g_aGstShadowInfo[enmGstReg].cb < sizeof(uint32_t)) { /* test reg64, imm32 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xf7; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxReg & 7); pbCodeBuf[off++] = 0; pbCodeBuf[off++] = g_aGstShadowInfo[enmGstReg].cb > sizeof(uint8_t) ? 0 : 0xff; pbCodeBuf[off++] = 0xff; pbCodeBuf[off++] = 0xff; /* je/jz +1 */ pbCodeBuf[off++] = 0x74; pbCodeBuf[off++] = 0x01; /* int3 */ pbCodeBuf[off++] = 0xcc; } else if (g_aGstShadowInfo[enmGstReg].cb == sizeof(uint32_t)) { /* rol reg64, 32 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxReg & 7); pbCodeBuf[off++] = 32; /* test reg32, ffffffffh */ if (idxReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; pbCodeBuf[off++] = 0xf7; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxReg & 7); pbCodeBuf[off++] = 0xff; pbCodeBuf[off++] = 0xff; pbCodeBuf[off++] = 0xff; pbCodeBuf[off++] = 0xff; /* je/jz +1 */ pbCodeBuf[off++] = 0x74; pbCodeBuf[off++] = 0x01; /* int3 */ pbCodeBuf[off++] = 0xcc; /* rol reg64, 32 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxReg & 7); pbCodeBuf[off++] = 32; } # elif defined(RT_ARCH_ARM64) /* mov TMP0, [gstreg] */ off = iemNativeEmitLoadGprWithGstShadowReg(pReNative, off, IEMNATIVE_REG_FIXED_TMP0, enmGstReg); uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 3); /* sub tmp0, tmp0, idxReg */ pu32CodeBuf[off++] = Armv8A64MkInstrAddSubReg(true /*fSub*/, IEMNATIVE_REG_FIXED_TMP0, IEMNATIVE_REG_FIXED_TMP0, idxReg); /* cbz tmp0, +1 */ pu32CodeBuf[off++] = Armv8A64MkInstrCbzCbnz(false /*fJmpIfNotZero*/, 2, IEMNATIVE_REG_FIXED_TMP0); /* brk #0x1000+enmGstReg */ pu32CodeBuf[off++] = Armv8A64MkInstrBrk((uint32_t)enmGstReg | UINT32_C(0x1000)); # else # error "Port me!" # endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); return off; } #endif /* VBOX_STRICT */ /** * Emits a code for checking the return code of a call and rcPassUp, returning * from the code if either are non-zero. */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitCheckCallRetAndPassUp(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxInstr) { #ifdef RT_ARCH_AMD64 /* * AMD64: eax = call status code. */ /* edx = rcPassUp */ off = iemNativeEmitLoadGprFromVCpuU32(pReNative, off, X86_GREG_xDX, RT_UOFFSETOF(VMCPUCC, iem.s.rcPassUp)); # ifdef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitLoadGpr8Imm(pReNative, off, X86_GREG_xCX, idxInstr); # endif /* edx = eax | rcPassUp */ uint8_t *pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); pbCodeBuf[off++] = 0x0b; /* or edx, eax */ pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, X86_GREG_xDX, X86_GREG_xAX); IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); /* Jump to non-zero status return path. */ off = iemNativeEmitJnzToNewLabel(pReNative, off, kIemNativeLabelType_NonZeroRetOrPassUp); /* done. */ #elif RT_ARCH_ARM64 /* * ARM64: w0 = call status code. */ off = iemNativeEmitLoadGprImm64(pReNative, off, ARMV8_A64_REG_X2, idxInstr); /** @todo 32-bit imm load? Fixed counter register? */ off = iemNativeEmitLoadGprFromVCpuU32(pReNative, off, ARMV8_A64_REG_X3, RT_UOFFSETOF(VMCPUCC, iem.s.rcPassUp)); uint32_t *pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 3); pu32CodeBuf[off++] = Armv8A64MkInstrOrr(ARMV8_A64_REG_X4, ARMV8_A64_REG_X3, ARMV8_A64_REG_X0, false /*f64Bit*/); uint32_t const idxLabel = iemNativeLabelCreate(pReNative, kIemNativeLabelType_NonZeroRetOrPassUp); iemNativeAddFixup(pReNative, off, idxLabel, kIemNativeFixupType_RelImm19At5); pu32CodeBuf[off++] = Armv8A64MkInstrCbzCbnz(true /*fJmpIfNotZero*/, 0, ARMV8_A64_REG_X4, false /*f64Bit*/); #else # error "port me" #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); return off; } /** * Emits code to check if the content of @a idxAddrReg is a canonical address, * raising a \#GP(0) if it isn't. * * @returns New code buffer offset, UINT32_MAX on failure. * @param pReNative The native recompile state. * @param off The code buffer offset. * @param idxAddrReg The host register with the address to check. * @param idxInstr The current instruction. */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitCheckGprCanonicalMaybeRaiseGp0(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxAddrReg, uint8_t idxInstr) { RT_NOREF(idxInstr); /* * Make sure we don't have any outstanding guest register writes as we may * raise an #GP(0) and all guest register must be up to date in CPUMCTX. */ off = iemNativeRegFlushPendingWrites(pReNative, off); #ifdef RT_ARCH_AMD64 /* * if ((((uint32_t)(a_u64Addr >> 32) + UINT32_C(0x8000)) >> 16) != 0) * return raisexcpt(); * ---- this wariant avoid loading a 64-bit immediate, but is an instruction longer. */ uint8_t const iTmpReg = iemNativeRegAllocTmp(pReNative, &off); off = iemNativeEmitLoadGprFromGpr(pReNative, off, iTmpReg, idxAddrReg); off = iemNativeEmitShiftGprRight(pReNative, off, iTmpReg, 32); off = iemNativeEmitAddGpr32Imm(pReNative, off, iTmpReg, (int32_t)0x8000); off = iemNativeEmitShiftGprRight(pReNative, off, iTmpReg, 16); # ifndef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitJnzToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); # else uint32_t const offFixup = off; off = iemNativeEmitJzToFixed(pReNative, off, 0); off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, idxInstr); off = iemNativeEmitJmpToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); iemNativeFixupFixedJump(pReNative, offFixup, off /*offTarget*/); # endif iemNativeRegFreeTmp(pReNative, iTmpReg); #elif defined(RT_ARCH_ARM64) /* * if ((((uint64_t)(a_u64Addr) + UINT64_C(0x800000000000)) >> 48) != 0) * return raisexcpt(); * ---- * mov x1, 0x800000000000 * add x1, x0, x1 * cmp xzr, x1, lsr 48 * and either: * b.ne .Lraisexcpt * or: * b.eq .Lnoexcept * movz x1, #instruction-number * b .Lraisexcpt * .Lnoexcept: */ uint8_t const iTmpReg = iemNativeRegAllocTmp(pReNative, &off); off = iemNativeEmitLoadGprImm64(pReNative, off, iTmpReg, UINT64_C(0x800000000000)); off = iemNativeEmitAddTwoGprs(pReNative, off, iTmpReg, idxAddrReg); off = iemNativeEmitCmpArm64(pReNative, off, ARMV8_A64_REG_XZR, idxAddrReg, true /*f64Bit*/, 48 /*cShift*/, kArmv8A64InstrShift_Lsr); # ifndef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitJnzToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); # else uint32_t const offFixup = off; off = iemNativeEmitJzToFixed(pReNative, off, 0); off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, idxInstr); off = iemNativeEmitJmpToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); iemNativeFixupFixedJump(pReNative, offFixup, off /*offTarget*/); # endif iemNativeRegFreeTmp(pReNative, iTmpReg); #else # error "Port me" #endif return off; } /** * Emits code to check if the content of @a idxAddrReg is within the limit of * idxSegReg, raising a \#GP(0) if it isn't. * * @returns New code buffer offset; throws VBox status code on error. * @param pReNative The native recompile state. * @param off The code buffer offset. * @param idxAddrReg The host register (32-bit) with the address to * check. * @param idxSegReg The segment register (X86_SREG_XXX) to check * against. * @param idxInstr The current instruction. */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitCheckGpr32AgainstSegLimitMaybeRaiseGp0(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxAddrReg, uint8_t idxSegReg, uint8_t idxInstr) { /* * Make sure we don't have any outstanding guest register writes as we may * raise an #GP(0) and all guest register must be up to date in CPUMCTX. */ off = iemNativeRegFlushPendingWrites(pReNative, off); /** @todo implement expand down/whatnot checking */ AssertStmt(idxSegReg == X86_SREG_CS, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_EMIT_CASE_NOT_IMPLEMENTED_1)); uint8_t const iTmpLimReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_SegLimitFirst + idxSegReg), kIemNativeGstRegUse_ForUpdate); off = iemNativeEmitCmpGpr32WithGpr(pReNative, off, idxAddrReg, iTmpLimReg); #ifndef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitJaToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); RT_NOREF(idxInstr); #else uint32_t const offFixup = off; off = iemNativeEmitJbeToFixed(pReNative, off, 0); off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, idxInstr); off = iemNativeEmitJmpToNewLabel(pReNative, off, kIemNativeLabelType_RaiseGp0); iemNativeFixupFixedJump(pReNative, offFixup, off /*offTarget*/); #endif iemNativeRegFreeTmp(pReNative, iTmpLimReg); return off; } /** * Converts IEM_CIMPL_F_XXX flags into a guest register shadow copy flush mask. * * @returns The flush mask. * @param fCImpl The IEM_CIMPL_F_XXX flags. * @param fGstShwFlush The starting flush mask. */ DECL_FORCE_INLINE(uint64_t) iemNativeCImplFlagsToGuestShadowFlushMask(uint32_t fCImpl, uint64_t fGstShwFlush) { if (fCImpl & IEM_CIMPL_F_BRANCH_FAR) fGstShwFlush |= RT_BIT_64(kIemNativeGstReg_SegSelFirst + X86_SREG_CS) | RT_BIT_64(kIemNativeGstReg_SegBaseFirst + X86_SREG_CS) | RT_BIT_64(kIemNativeGstReg_SegLimitFirst + X86_SREG_CS); if (fCImpl & IEM_CIMPL_F_BRANCH_STACK_FAR) fGstShwFlush |= RT_BIT_64(kIemNativeGstReg_GprFirst + X86_GREG_xSP) | RT_BIT_64(kIemNativeGstReg_SegSelFirst + X86_SREG_SS) | RT_BIT_64(kIemNativeGstReg_SegBaseFirst + X86_SREG_SS) | RT_BIT_64(kIemNativeGstReg_SegLimitFirst + X86_SREG_SS); else if (fCImpl & IEM_CIMPL_F_BRANCH_STACK) fGstShwFlush |= RT_BIT_64(kIemNativeGstReg_GprFirst + X86_GREG_xSP); if (fCImpl & (IEM_CIMPL_F_RFLAGS | IEM_CIMPL_F_STATUS_FLAGS | IEM_CIMPL_F_INHIBIT_SHADOW)) fGstShwFlush |= RT_BIT_64(kIemNativeGstReg_EFlags); return fGstShwFlush; } /** * Emits a call to a CImpl function or something similar. */ static int32_t iemNativeEmitCImplCall(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t cbInstr, uint8_t cAddParams, uint64_t uParam0, uint64_t uParam1, uint64_t uParam2) { /* * Flush stuff. PC and EFlags are implictly flushed, the latter because we * don't do with/without flags variants of defer-to-cimpl stuff at the moment. */ fGstShwFlush = iemNativeCImplFlagsToGuestShadowFlushMask(pReNative->fCImpl, fGstShwFlush | RT_BIT_64(kIemNativeGstReg_Pc) | RT_BIT_64(kIemNativeGstReg_EFlags)); iemNativeRegFlushGuestShadows(pReNative, fGstShwFlush); off = iemNativeRegMoveAndFreeAndFlushAtCall(pReNative, off, 4); /* * Load the parameters. */ #if defined(RT_OS_WINDOWS) && defined(VBOXSTRICTRC_STRICT_ENABLED) /* Special code the hidden VBOXSTRICTRC pointer. */ off = iemNativeEmitLoadGprFromGpr( pReNative, off, IEMNATIVE_CALL_ARG1_GREG, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGprImm64( pReNative, off, IEMNATIVE_CALL_ARG2_GREG, cbInstr); /** @todo 8-bit reg load opt for amd64 */ if (cAddParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG3_GREG, uParam0); if (cAddParams > 1) off = iemNativeEmitStoreImm64ByBp(pReNative, off, IEMNATIVE_FP_OFF_STACK_ARG0, uParam1); if (cAddParams > 2) off = iemNativeEmitStoreImm64ByBp(pReNative, off, IEMNATIVE_FP_OFF_STACK_ARG1, uParam2); off = iemNativeEmitLeaGprByBp(pReNative, off, X86_GREG_xCX, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict */ #else AssertCompile(IEMNATIVE_CALL_ARG_GREG_COUNT >= 4); off = iemNativeEmitLoadGprFromGpr( pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGprImm64( pReNative, off, IEMNATIVE_CALL_ARG1_GREG, cbInstr); /** @todo 8-bit reg load opt for amd64 */ if (cAddParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG2_GREG, uParam0); if (cAddParams > 1) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG3_GREG, uParam1); if (cAddParams > 2) # if IEMNATIVE_CALL_ARG_GREG_COUNT >= 5 off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG4_GREG, uParam2); # else off = iemNativeEmitStoreImm64ByBp(pReNative, off, IEMNATIVE_FP_OFF_STACK_ARG0, uParam2); # endif #endif /* * Make the call. */ off = iemNativeEmitCallImm(pReNative, off, pfnCImpl); #if defined(RT_ARCH_AMD64) && defined(VBOXSTRICTRC_STRICT_ENABLED) && defined(RT_OS_WINDOWS) off = iemNativeEmitLoadGprByBpU32(pReNative, off, X86_GREG_xAX, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict (see above) */ #endif /* * Check the status code. */ return iemNativeEmitCheckCallRetAndPassUp(pReNative, off, idxInstr); } /** * Emits a call to a threaded worker function. */ static uint32_t iemNativeEmitThreadedCall(PIEMRECOMPILERSTATE pReNative, uint32_t off, PCIEMTHRDEDCALLENTRY pCallEntry) { iemNativeRegFlushGuestShadows(pReNative, UINT64_MAX); /** @todo optimize this */ off = iemNativeRegMoveAndFreeAndFlushAtCall(pReNative, off, 4); uint8_t const cParams = g_acIemThreadedFunctionUsedArgs[pCallEntry->enmFunction]; #ifdef RT_ARCH_AMD64 /* Load the parameters and emit the call. */ # ifdef RT_OS_WINDOWS # ifndef VBOXSTRICTRC_STRICT_ENABLED off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xCX, IEMNATIVE_REG_FIXED_PVMCPU); if (cParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_xDX, pCallEntry->auParams[0]); if (cParams > 1) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_x8, pCallEntry->auParams[1]); if (cParams > 2) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_x9, pCallEntry->auParams[2]); # else /* VBOXSTRICTRC: Returned via hidden parameter. Sigh. */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xDX, IEMNATIVE_REG_FIXED_PVMCPU); if (cParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_x8, pCallEntry->auParams[0]); if (cParams > 1) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_x9, pCallEntry->auParams[1]); if (cParams > 2) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_x10, pCallEntry->auParams[2]); off = iemNativeEmitStoreGprByBp(pReNative, off, IEMNATIVE_FP_OFF_STACK_ARG0, X86_GREG_x10); off = iemNativeEmitLeaGprByBp(pReNative, off, X86_GREG_xCX, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict */ # endif /* VBOXSTRICTRC_STRICT_ENABLED */ # else off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xDI, IEMNATIVE_REG_FIXED_PVMCPU); if (cParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_xSI, pCallEntry->auParams[0]); if (cParams > 1) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_xDX, pCallEntry->auParams[1]); if (cParams > 2) off = iemNativeEmitLoadGprImm64(pReNative, off, X86_GREG_xCX, pCallEntry->auParams[2]); # endif off = iemNativeEmitCallImm(pReNative, off, (uintptr_t)g_apfnIemThreadedFunctions[pCallEntry->enmFunction]); # if defined(VBOXSTRICTRC_STRICT_ENABLED) && defined(RT_OS_WINDOWS) off = iemNativeEmitLoadGprByBpU32(pReNative, off, X86_GREG_xAX, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict (see above) */ # endif #elif RT_ARCH_ARM64 /* * ARM64: */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_REG_FIXED_PVMCPU); if (cParams > 0) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, pCallEntry->auParams[0]); if (cParams > 1) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG2_GREG, pCallEntry->auParams[1]); if (cParams > 2) off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_ARG3_GREG, pCallEntry->auParams[2]); off = iemNativeEmitCallImm(pReNative, off, (uintptr_t)g_apfnIemThreadedFunctions[pCallEntry->enmFunction]); #else # error "port me" #endif /* * Check the status code. */ off = iemNativeEmitCheckCallRetAndPassUp(pReNative, off, pCallEntry->idxInstr); return off; } /** * Emits the code at the RaiseGP0 label. */ static uint32_t iemNativeEmitRaiseGp0(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t idxReturnLabel) { uint32_t const idxLabel = iemNativeLabelFind(pReNative, kIemNativeLabelType_RaiseGp0); if (idxLabel != UINT32_MAX) { iemNativeLabelDefine(pReNative, idxLabel, off); /* iemNativeHlpExecRaiseGp0(PVMCPUCC pVCpu, uint8_t idxInstr) */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_REG_FIXED_PVMCPU); #ifndef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, 0); #endif off = iemNativeEmitCallImm(pReNative, off, (uintptr_t)iemNativeHlpExecRaiseGp0); /* jump back to the return sequence. */ off = iemNativeEmitJmpToLabel(pReNative, off, idxReturnLabel); } return off; } /** * Emits the code at the ReturnWithFlags label (returns * VINF_IEM_REEXEC_FINISH_WITH_FLAGS). */ static uint32_t iemNativeEmitReturnWithFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t idxReturnLabel) { uint32_t const idxLabel = iemNativeLabelFind(pReNative, kIemNativeLabelType_ReturnWithFlags); if (idxLabel != UINT32_MAX) { iemNativeLabelDefine(pReNative, idxLabel, off); off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_RET_GREG, VINF_IEM_REEXEC_FINISH_WITH_FLAGS); /* jump back to the return sequence. */ off = iemNativeEmitJmpToLabel(pReNative, off, idxReturnLabel); } return off; } /** * Emits the code at the ReturnBreak label (returns VINF_IEM_REEXEC_BREAK). */ static uint32_t iemNativeEmitReturnBreak(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t idxReturnLabel) { uint32_t const idxLabel = iemNativeLabelFind(pReNative, kIemNativeLabelType_ReturnBreak); if (idxLabel != UINT32_MAX) { iemNativeLabelDefine(pReNative, idxLabel, off); off = iemNativeEmitLoadGprImm64(pReNative, off, IEMNATIVE_CALL_RET_GREG, VINF_IEM_REEXEC_BREAK); /* jump back to the return sequence. */ off = iemNativeEmitJmpToLabel(pReNative, off, idxReturnLabel); } return off; } /** * Emits the RC fiddling code for handling non-zero return code or rcPassUp. */ static uint32_t iemNativeEmitRcFiddling(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t idxReturnLabel) { /* * Generate the rc + rcPassUp fiddling code if needed. */ uint32_t const idxLabel = iemNativeLabelFind(pReNative, kIemNativeLabelType_NonZeroRetOrPassUp); if (idxLabel != UINT32_MAX) { iemNativeLabelDefine(pReNative, idxLabel, off); /* iemNativeHlpExecStatusCodeFiddling(PVMCPUCC pVCpu, int rc, uint8_t idxInstr) */ #ifdef RT_ARCH_AMD64 # ifdef RT_OS_WINDOWS # ifdef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_x8, X86_GREG_xCX); /* cl = instruction number */ # endif off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xCX, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xDX, X86_GREG_xAX); # else off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xDI, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xSI, X86_GREG_xAX); # ifdef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitLoadGprFromGpr(pReNative, off, X86_GREG_xDX, X86_GREG_xCX); /* cl = instruction number */ # endif # endif # ifndef IEMNATIVE_WITH_INSTRUCTION_COUNTING off = iemNativeEmitLoadGpr8Imm(pReNative, off, X86_GREG_xCX, 0); # endif #else off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, IEMNATIVE_CALL_RET_GREG); off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_REG_FIXED_PVMCPU); /* IEMNATIVE_CALL_ARG2_GREG is already set. */ #endif off = iemNativeEmitCallImm(pReNative, off, (uintptr_t)iemNativeHlpExecStatusCodeFiddling); off = iemNativeEmitJmpToLabel(pReNative, off, idxReturnLabel); } return off; } /** * Emits a standard epilog. */ static uint32_t iemNativeEmitEpilog(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t *pidxReturnLabel) { *pidxReturnLabel = UINT32_MAX; /* * Successful return, so clear the return register (eax, w0). */ off = iemNativeEmitGprZero(pReNative,off, IEMNATIVE_CALL_RET_GREG); /* * Define label for common return point. */ uint32_t const idxReturn = iemNativeLabelCreate(pReNative, kIemNativeLabelType_Return, off); *pidxReturnLabel = idxReturn; /* * Restore registers and return. */ #ifdef RT_ARCH_AMD64 uint8_t * const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 20); /* Reposition esp at the r15 restore point. */ pbCodeBuf[off++] = X86_OP_REX_W; pbCodeBuf[off++] = 0x8d; /* lea rsp, [rbp - (gcc ? 5 : 7) * 8] */ pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_MEM1, X86_GREG_xSP, X86_GREG_xBP); pbCodeBuf[off++] = (uint8_t)IEMNATIVE_FP_OFF_LAST_PUSH; /* Pop non-volatile registers and return */ pbCodeBuf[off++] = X86_OP_REX_B; /* pop r15 */ pbCodeBuf[off++] = 0x58 + X86_GREG_x15 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* pop r14 */ pbCodeBuf[off++] = 0x58 + X86_GREG_x14 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* pop r13 */ pbCodeBuf[off++] = 0x58 + X86_GREG_x13 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* pop r12 */ pbCodeBuf[off++] = 0x58 + X86_GREG_x12 - 8; # ifdef RT_OS_WINDOWS pbCodeBuf[off++] = 0x58 + X86_GREG_xDI; /* pop rdi */ pbCodeBuf[off++] = 0x58 + X86_GREG_xSI; /* pop rsi */ # endif pbCodeBuf[off++] = 0x58 + X86_GREG_xBX; /* pop rbx */ pbCodeBuf[off++] = 0xc9; /* leave */ pbCodeBuf[off++] = 0xc3; /* ret */ pbCodeBuf[off++] = 0xcc; /* int3 poison */ #elif RT_ARCH_ARM64 uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 10); /* ldp x19, x20, [sp #IEMNATIVE_FRAME_VAR_SIZE]! ; Unallocate the variable space and restore x19+x20. */ AssertCompile(IEMNATIVE_FRAME_VAR_SIZE < 64*8); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_PreIndex, ARMV8_A64_REG_X19, ARMV8_A64_REG_X20, ARMV8_A64_REG_SP, IEMNATIVE_FRAME_VAR_SIZE / 8); /* Restore x21 thru x28 + BP and LR (ret address) (SP remains unchanged in the kSigned variant). */ pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X21, ARMV8_A64_REG_X22, ARMV8_A64_REG_SP, 2); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X23, ARMV8_A64_REG_X24, ARMV8_A64_REG_SP, 4); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X25, ARMV8_A64_REG_X26, ARMV8_A64_REG_SP, 6); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X27, ARMV8_A64_REG_X28, ARMV8_A64_REG_SP, 8); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(true /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_BP, ARMV8_A64_REG_LR, ARMV8_A64_REG_SP, 10); AssertCompile(IEMNATIVE_FRAME_SAVE_REG_SIZE / 8 == 12); /* add sp, sp, IEMNATIVE_FRAME_SAVE_REG_SIZE ; */ AssertCompile(IEMNATIVE_FRAME_SAVE_REG_SIZE < 4096); pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(false /*fSub*/, ARMV8_A64_REG_SP, ARMV8_A64_REG_SP, IEMNATIVE_FRAME_SAVE_REG_SIZE); /* retab / ret */ # ifdef RT_OS_DARWIN /** @todo See todo on pacibsp in the prolog. */ if (1) pu32CodeBuf[off++] = ARMV8_A64_INSTR_RETAB; else # endif pu32CodeBuf[off++] = ARMV8_A64_INSTR_RET; #else # error "port me" #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); return iemNativeEmitRcFiddling(pReNative, off, idxReturn); } /** * Emits a standard prolog. */ static uint32_t iemNativeEmitProlog(PIEMRECOMPILERSTATE pReNative, uint32_t off) { #ifdef RT_ARCH_AMD64 /* * Set up a regular xBP stack frame, pushing all non-volatile GPRs, * reserving 64 bytes for stack variables plus 4 non-register argument * slots. Fixed register assignment: xBX = pReNative; * * Since we always do the same register spilling, we can use the same * unwind description for all the code. */ uint8_t *const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 32); pbCodeBuf[off++] = 0x50 + X86_GREG_xBP; /* push rbp */ pbCodeBuf[off++] = X86_OP_REX_W; /* mov rbp, rsp */ pbCodeBuf[off++] = 0x8b; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, X86_GREG_xBP, X86_GREG_xSP); pbCodeBuf[off++] = 0x50 + X86_GREG_xBX; /* push rbx */ AssertCompile(IEMNATIVE_REG_FIXED_PVMCPU == X86_GREG_xBX); # ifdef RT_OS_WINDOWS pbCodeBuf[off++] = X86_OP_REX_W; /* mov rbx, rcx ; RBX = pVCpu */ pbCodeBuf[off++] = 0x8b; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, X86_GREG_xBX, X86_GREG_xCX); pbCodeBuf[off++] = 0x50 + X86_GREG_xSI; /* push rsi */ pbCodeBuf[off++] = 0x50 + X86_GREG_xDI; /* push rdi */ # else pbCodeBuf[off++] = X86_OP_REX_W; /* mov rbx, rdi ; RBX = pVCpu */ pbCodeBuf[off++] = 0x8b; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, X86_GREG_xBX, X86_GREG_xDI); # endif pbCodeBuf[off++] = X86_OP_REX_B; /* push r12 */ pbCodeBuf[off++] = 0x50 + X86_GREG_x12 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* push r13 */ pbCodeBuf[off++] = 0x50 + X86_GREG_x13 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* push r14 */ pbCodeBuf[off++] = 0x50 + X86_GREG_x14 - 8; pbCodeBuf[off++] = X86_OP_REX_B; /* push r15 */ pbCodeBuf[off++] = 0x50 + X86_GREG_x15 - 8; off = iemNativeEmitSubGprImm(pReNative, off, /* sub rsp, byte 28h */ X86_GREG_xSP, IEMNATIVE_FRAME_ALIGN_SIZE + IEMNATIVE_FRAME_VAR_SIZE + IEMNATIVE_FRAME_STACK_ARG_COUNT * 8 + IEMNATIVE_FRAME_SHADOW_ARG_COUNT * 8); AssertCompile(!(IEMNATIVE_FRAME_VAR_SIZE & 0xf)); AssertCompile(!(IEMNATIVE_FRAME_STACK_ARG_COUNT & 0x1)); AssertCompile(!(IEMNATIVE_FRAME_SHADOW_ARG_COUNT & 0x1)); #elif RT_ARCH_ARM64 /* * We set up a stack frame exactly like on x86, only we have to push the * return address our selves here. We save all non-volatile registers. */ uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 10); # ifdef RT_OS_DARWIN /** @todo This seems to be requirement by libunwind for JIT FDEs. Investigate further as been unable * to figure out where the BRK following AUTHB*+XPACB* stuff comes from in libunwind. It's * definitely the dwarf stepping code, but till found it's very tedious to figure out whether it's * in any way conditional, so just emitting this instructions now and hoping for the best... */ /* pacibsp */ pu32CodeBuf[off++] = ARMV8_A64_INSTR_PACIBSP; # endif /* stp x19, x20, [sp, #-IEMNATIVE_FRAME_SAVE_REG_SIZE] ; Allocate space for saving registers and place x19+x20 at the bottom. */ AssertCompile(IEMNATIVE_FRAME_SAVE_REG_SIZE < 64*8); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_PreIndex, ARMV8_A64_REG_X19, ARMV8_A64_REG_X20, ARMV8_A64_REG_SP, -IEMNATIVE_FRAME_SAVE_REG_SIZE / 8); /* Save x21 thru x28 (SP remains unchanged in the kSigned variant). */ pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X21, ARMV8_A64_REG_X22, ARMV8_A64_REG_SP, 2); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X23, ARMV8_A64_REG_X24, ARMV8_A64_REG_SP, 4); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X25, ARMV8_A64_REG_X26, ARMV8_A64_REG_SP, 6); pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_X27, ARMV8_A64_REG_X28, ARMV8_A64_REG_SP, 8); /* Save the BP and LR (ret address) registers at the top of the frame. */ pu32CodeBuf[off++] = Armv8A64MkInstrStLdPair(false /*fLoad*/, 2 /*64-bit*/, kArm64InstrStLdPairType_Signed, ARMV8_A64_REG_BP, ARMV8_A64_REG_LR, ARMV8_A64_REG_SP, 10); AssertCompile(IEMNATIVE_FRAME_SAVE_REG_SIZE / 8 == 12); /* add bp, sp, IEMNATIVE_FRAME_SAVE_REG_SIZE - 16 ; Set BP to point to the old BP stack address. */ pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(false /*fSub*/, ARMV8_A64_REG_BP, ARMV8_A64_REG_SP, IEMNATIVE_FRAME_SAVE_REG_SIZE - 16); /* sub sp, sp, IEMNATIVE_FRAME_VAR_SIZE ; Allocate the variable area from SP. */ pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(true /*fSub*/, ARMV8_A64_REG_SP, ARMV8_A64_REG_SP, IEMNATIVE_FRAME_VAR_SIZE); /* mov r28, r0 */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_REG_FIXED_PVMCPU, IEMNATIVE_CALL_ARG0_GREG); /* mov r27, r1 */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_REG_FIXED_PCPUMCTX, IEMNATIVE_CALL_ARG1_GREG); #else # error "port me" #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); return off; } /********************************************************************************************************************************* * Emitters for IEM_MC_BEGIN and IEM_MC_END. * *********************************************************************************************************************************/ #define IEM_MC_BEGIN(a_cArgs, a_cLocals, a_fMcFlags, a_fCImplFlags) \ { \ pReNative->fMc = (a_fMcFlags); \ pReNative->fCImpl = (a_fCImplFlags); \ pReNative->cArgs = ((a_cArgs) + iemNativeArgGetHiddenArgCount(pReNative)) /** We have to get to the end in recompilation mode, as otherwise we won't * generate code for all the IEM_MC_IF_XXX branches. */ #define IEM_MC_END() \ } return off /********************************************************************************************************************************* * Emitters for standalone C-implementation deferals (IEM_MC_DEFER_TO_CIMPL_XXXX) * *********************************************************************************************************************************/ #define IEM_MC_DEFER_TO_CIMPL_0_RET_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl) \ pReNative->fMc = 0; \ pReNative->fCImpl = (a_fFlags); \ return iemNativeEmitCImplCall0(pReNative, off, pCallEntry->idxInstr, a_fGstShwFlush, (uintptr_t)a_pfnCImpl, a_cbInstr) /** @todo not used ... */ #define IEM_MC_DEFER_TO_CIMPL_1_RET_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0) \ pReNative->fMc = 0; \ pReNative->fCImpl = (a_fFlags); \ return iemNativeEmitCImplCall1(pReNative, off, pCallEntry->idxInstr, a_fGstShwFlush, (uintptr_t)a_pfnCImpl, a_cbInstr, a0) DECL_INLINE_THROW(uint32_t) iemNativeEmitCImplCall1(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxInstr, uint64_t a_fGstShwFlush, uintptr_t pfnCImpl, uint8_t cbInstr, uint64_t uArg0) { return iemNativeEmitCImplCall(pReNative, off, idxInstr, a_fGstShwFlush, pfnCImpl, cbInstr, 1, uArg0, 0, 0); } #define IEM_MC_DEFER_TO_CIMPL_2_RET_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1) \ pReNative->fMc = 0; \ pReNative->fCImpl = (a_fFlags); \ return iemNativeEmitCImplCall2(pReNative, off, pCallEntry->idxInstr, a_fGstShwFlush, \ (uintptr_t)a_pfnCImpl, a_cbInstr, a0, a1) DECL_INLINE_THROW(uint32_t) iemNativeEmitCImplCall2(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxInstr, uint64_t a_fGstShwFlush, uintptr_t pfnCImpl, uint8_t cbInstr, uint64_t uArg0, uint64_t uArg1) { return iemNativeEmitCImplCall(pReNative, off, idxInstr, a_fGstShwFlush, pfnCImpl, cbInstr, 2, uArg0, uArg1, 0); } #define IEM_MC_DEFER_TO_CIMPL_3_RET_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1, a2) \ pReNative->fMc = 0; \ pReNative->fCImpl = (a_fFlags); \ return iemNativeEmitCImplCall3(pReNative, off, pCallEntry->idxInstr, a_fGstShwFlush, \ (uintptr_t)a_pfnCImpl, a_cbInstr, a0, a1, a2) DECL_INLINE_THROW(uint32_t) iemNativeEmitCImplCall3(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxInstr, uint64_t a_fGstShwFlush, uintptr_t pfnCImpl, uint8_t cbInstr, uint64_t uArg0, uint64_t uArg1, uint64_t uArg2) { return iemNativeEmitCImplCall(pReNative, off, idxInstr, a_fGstShwFlush, pfnCImpl, cbInstr, 3, uArg0, uArg1, uArg2); } /********************************************************************************************************************************* * Emitters for advancing PC/RIP/EIP/IP (IEM_MC_ADVANCE_RIP_AND_FINISH_XXX) * *********************************************************************************************************************************/ /** Emits the flags check for IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC64_WITH_FLAGS * and the other _WITH_FLAGS MCs, see iemRegFinishClearingRF. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitFinishInstructionFlagsCheck(PIEMRECOMPILERSTATE pReNative, uint32_t off) { /* * If its not just X86_EFL_RF and CPUMCTX_INHIBIT_SHADOW that are set, we * return with special status code and make the execution loop deal with * this. If TF or CPUMCTX_DBG_HIT_DRX_MASK triggers, we have to raise an * exception and won't continue execution. While CPUMCTX_DBG_DBGF_MASK * could continue w/o interruption, it probably will drop into the * debugger, so not worth the effort of trying to services it here and we * just lump it in with the handling of the others. * * To simplify the code and the register state management even more (wrt * immediate in AND operation), we always update the flags and skip the * extra check associated conditional jump. */ AssertCompile( (X86_EFL_TF | X86_EFL_RF | CPUMCTX_INHIBIT_SHADOW | CPUMCTX_DBG_HIT_DRX_MASK | CPUMCTX_DBG_DBGF_MASK) <= UINT32_MAX); uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ForUpdate); off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfAnySet(pReNative, off, idxEflReg, X86_EFL_TF | CPUMCTX_DBG_HIT_DRX_MASK | CPUMCTX_DBG_DBGF_MASK, iemNativeLabelCreate(pReNative, kIemNativeLabelType_ReturnWithFlags)); off = iemNativeEmitAndGpr32ByImm(pReNative, off, idxEflReg, ~(uint32_t)(X86_EFL_RF | CPUMCTX_INHIBIT_SHADOW)); off = iemNativeEmitStoreGprToVCpuU32(pReNative, off, idxEflReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.eflags)); /* Free but don't flush the EFLAGS register. */ iemNativeRegFreeTmp(pReNative, idxEflReg); return off; } #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC64(a_cbInstr) \ off = iemNativeEmitAddToRip64AndFinishingNoFlags(pReNative, off, (a_cbInstr)) #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC64_WITH_FLAGS(a_cbInstr) \ IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC64(a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegAddToRip64AndFinishingNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitAddToRip64AndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr) { /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition and store the result. */ off = iemNativeEmitAddGprImm8(pReNative, off, idxPcReg, cbInstr); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC32(a_cbInstr) \ off = iemNativeEmitAddToEip32AndFinishingNoFlags(pReNative, off, (a_cbInstr)) #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC32_WITH_FLAGS(a_cbInstr) \ IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC32(a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegAddToEip32AndFinishingNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitAddToEip32AndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr) { /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition and store the result. */ off = iemNativeEmitAddGpr32Imm8(pReNative, off, idxPcReg, cbInstr); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC16(a_cbInstr) \ off = iemNativeEmitAddToIp16AndFinishingNoFlags(pReNative, off, (a_cbInstr)) #define IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC16_WITH_FLAGS(a_cbInstr) \ IEM_MC_ADVANCE_RIP_AND_FINISH_THREADED_PC16(a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegAddToIp16AndFinishingNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitAddToIp16AndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr) { /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition and store the result. */ off = iemNativeEmitAddGpr32Imm8(pReNative, off, idxPcReg, cbInstr); off = iemNativeEmitClear16UpGpr(pReNative, off, idxPcReg); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } /********************************************************************************************************************************* * Emitters for changing PC/RIP/EIP/IP with a relative jump (IEM_MC_REL_JMP_XXX_AND_FINISH_XXX). * *********************************************************************************************************************************/ #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC64(a_i8, a_cbInstr, a_enmEffOpSize) \ off = iemNativeEmitRip64RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int8_t)(a_i8), \ (a_enmEffOpSize), pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC64_WITH_FLAGS(a_i8, a_cbInstr, a_enmEffOpSize) \ IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC64(a_i8, a_cbInstr, a_enmEffOpSize); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC64(a_i16, a_cbInstr) \ off = iemNativeEmitRip64RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int16_t)(a_i16), \ IEMMODE_16BIT, pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC64_WITH_FLAGS(a_i16, a_cbInstr) \ IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC64(a_i16, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC64(a_i32, a_cbInstr) \ off = iemNativeEmitRip64RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (a_i32), \ IEMMODE_64BIT, pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC64_WITH_FLAGS(a_i32, a_cbInstr) \ IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC64(a_i32, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegRip64RelativeJumpS8AndFinishNoFlags, * iemRegRip64RelativeJumpS16AndFinishNoFlags and * iemRegRip64RelativeJumpS32AndFinishNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitRip64RelativeJumpAndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, int32_t offDisp, IEMMODE enmEffOpSize, uint8_t idxInstr) { Assert(enmEffOpSize == IEMMODE_64BIT || enmEffOpSize == IEMMODE_16BIT); /* We speculatively modify PC and may raise #GP(0), so make sure the right value is in CPUMCTX. */ off = iemNativeRegFlushPendingWrites(pReNative, off); /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition. */ off = iemNativeEmitAddGprImm(pReNative, off, idxPcReg, (int64_t)offDisp + cbInstr); if (RT_LIKELY(enmEffOpSize == IEMMODE_64BIT)) { /* Check that the address is canonical, raising #GP(0) + exit TB if it isn't. */ off = iemNativeEmitCheckGprCanonicalMaybeRaiseGp0(pReNative, off, idxPcReg, idxInstr); } else { /* Just truncate the result to 16-bit IP. */ Assert(enmEffOpSize == IEMMODE_16BIT); off = iemNativeEmitClear16UpGpr(pReNative, off, idxPcReg); } off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC32(a_i8, a_cbInstr, a_enmEffOpSize) \ off = iemNativeEmitEip32RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int8_t)(a_i8), \ (a_enmEffOpSize), pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC32_WITH_FLAGS(a_i8, a_cbInstr, a_enmEffOpSize) \ IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC32(a_i8, a_cbInstr, a_enmEffOpSize); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC32(a_i16, a_cbInstr) \ off = iemNativeEmitEip32RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int16_t)(a_i16), \ IEMMODE_16BIT, pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC32_WITH_FLAGS(a_i16, a_cbInstr) \ IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC32(a_i16, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC32(a_i32, a_cbInstr) \ off = iemNativeEmitEip32RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (a_i32), \ IEMMODE_32BIT, pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC32_WITH_FLAGS(a_i32, a_cbInstr) \ IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC32(a_i32, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegEip32RelativeJumpS8AndFinishNoFlags, * iemRegEip32RelativeJumpS16AndFinishNoFlags and * iemRegEip32RelativeJumpS32AndFinishNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitEip32RelativeJumpAndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, int32_t offDisp, IEMMODE enmEffOpSize, uint8_t idxInstr) { Assert(enmEffOpSize == IEMMODE_32BIT || enmEffOpSize == IEMMODE_16BIT); /* We speculatively modify PC and may raise #GP(0), so make sure the right value is in CPUMCTX. */ off = iemNativeRegFlushPendingWrites(pReNative, off); /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition. */ off = iemNativeEmitAddGpr32Imm(pReNative, off, idxPcReg, offDisp + cbInstr); /* Truncate the result to 16-bit IP if the operand size is 16-bit. */ if (enmEffOpSize == IEMMODE_16BIT) off = iemNativeEmitClear16UpGpr(pReNative, off, idxPcReg); /* Perform limit checking, potentially raising #GP(0) and exit the TB. */ off = iemNativeEmitCheckGpr32AgainstSegLimitMaybeRaiseGp0(pReNative, off, idxPcReg, X86_SREG_CS, idxInstr); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC16(a_i8, a_cbInstr) \ off = iemNativeEmitIp16RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int8_t)(a_i8), pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC16_WITH_FLAGS(a_i8, a_cbInstr) \ IEM_MC_REL_JMP_S8_AND_FINISH_THREADED_PC16(a_i8, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC16(a_i16, a_cbInstr) \ off = iemNativeEmitIp16RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (int16_t)(a_i16), pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC16_WITH_FLAGS(a_i16, a_cbInstr) \ IEM_MC_REL_JMP_S16_AND_FINISH_THREADED_PC16(a_i16, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC16(a_i32, a_cbInstr) \ off = iemNativeEmitIp16RelativeJumpAndFinishingNoFlags(pReNative, off, (a_cbInstr), (a_i32), pCallEntry->idxInstr) #define IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC16_WITH_FLAGS(a_i32, a_cbInstr) \ IEM_MC_REL_JMP_S32_AND_FINISH_THREADED_PC16(a_i32, a_cbInstr); \ off = iemNativeEmitFinishInstructionFlagsCheck(pReNative, off) /** Same as iemRegIp16RelativeJumpS8AndFinishNoFlags. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIp16RelativeJumpAndFinishingNoFlags(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, int32_t offDisp, uint8_t idxInstr) { /* We speculatively modify PC and may raise #GP(0), so make sure the right value is in CPUMCTX. */ off = iemNativeRegFlushPendingWrites(pReNative, off); /* Allocate a temporary PC register. */ uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ForUpdate); /* Perform the addition, clamp the result, check limit (may #GP(0) + exit TB) and store the result. */ off = iemNativeEmitAddGpr32Imm(pReNative, off, idxPcReg, offDisp + cbInstr); off = iemNativeEmitClear16UpGpr(pReNative, off, idxPcReg); off = iemNativeEmitCheckGpr32AgainstSegLimitMaybeRaiseGp0(pReNative, off, idxPcReg, X86_SREG_CS, idxInstr); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxPcReg, RT_UOFFSETOF(VMCPU, cpum.GstCtx.rip)); /* Free but don't flush the PC register. */ iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } /********************************************************************************************************************************* * Emitters for conditionals (IEM_MC_IF_XXX, IEM_MC_ELSE, IEM_MC_ENDIF) * *********************************************************************************************************************************/ /** * Pushes an IEM_MC_IF_XXX onto the condition stack. * * @returns Pointer to the condition stack entry on success, NULL on failure * (too many nestings) */ DECL_INLINE_THROW(PIEMNATIVECOND) iemNativeCondPushIf(PIEMRECOMPILERSTATE pReNative) { uint32_t const idxStack = pReNative->cCondDepth; AssertStmt(idxStack < RT_ELEMENTS(pReNative->aCondStack), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_COND_TOO_DEEPLY_NESTED)); PIEMNATIVECOND const pEntry = &pReNative->aCondStack[idxStack]; pReNative->cCondDepth = (uint8_t)(idxStack + 1); uint16_t const uCondSeqNo = ++pReNative->uCondSeqNo; pEntry->fInElse = false; pEntry->idxLabelElse = iemNativeLabelCreate(pReNative, kIemNativeLabelType_Else, UINT32_MAX /*offWhere*/, uCondSeqNo); pEntry->idxLabelEndIf = iemNativeLabelCreate(pReNative, kIemNativeLabelType_Endif, UINT32_MAX /*offWhere*/, uCondSeqNo); return pEntry; } /** * Start of the if-block, snapshotting the register and variable state. */ DECL_INLINE_THROW(void) iemNativeCondStartIfBlock(PIEMRECOMPILERSTATE pReNative, uint32_t offIfBlock, uint32_t idxLabelIf = UINT32_MAX) { Assert(offIfBlock != UINT32_MAX); Assert(pReNative->cCondDepth > 0 && pReNative->cCondDepth <= RT_ELEMENTS(pReNative->aCondStack)); PIEMNATIVECOND const pEntry = &pReNative->aCondStack[pReNative->cCondDepth - 1]; Assert(!pEntry->fInElse); /* Define the start of the IF block if request or for disassembly purposes. */ if (idxLabelIf != UINT32_MAX) iemNativeLabelDefine(pReNative, idxLabelIf, offIfBlock); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO else iemNativeLabelCreate(pReNative, kIemNativeLabelType_If, offIfBlock, pReNative->paLabels[pEntry->idxLabelElse].uData); #else RT_NOREF(offIfBlock); #endif /* Copy the initial state so we can restore it in the 'else' block. */ pEntry->InitialState = pReNative->Core; } #define IEM_MC_ELSE() } while (0); \ off = iemNativeEmitElse(pReNative, off); \ do { /** Emits code related to IEM_MC_ELSE. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitElse(PIEMRECOMPILERSTATE pReNative, uint32_t off) { /* Check sanity and get the conditional stack entry. */ Assert(off != UINT32_MAX); Assert(pReNative->cCondDepth > 0 && pReNative->cCondDepth <= RT_ELEMENTS(pReNative->aCondStack)); PIEMNATIVECOND const pEntry = &pReNative->aCondStack[pReNative->cCondDepth - 1]; Assert(!pEntry->fInElse); /* Jump to the endif */ off = iemNativeEmitJmpToLabel(pReNative, off, pEntry->idxLabelEndIf); /* Define the else label and enter the else part of the condition. */ iemNativeLabelDefine(pReNative, pEntry->idxLabelElse, off); pEntry->fInElse = true; /* Snapshot the core state so we can do a merge at the endif and restore the snapshot we took at the start of the if-block. */ pEntry->IfFinalState = pReNative->Core; pReNative->Core = pEntry->InitialState; return off; } #define IEM_MC_ENDIF() } while (0); \ off = iemNativeEmitEndIf(pReNative, off) /** Emits code related to IEM_MC_ENDIF. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitEndIf(PIEMRECOMPILERSTATE pReNative, uint32_t off) { /* Check sanity and get the conditional stack entry. */ Assert(off != UINT32_MAX); Assert(pReNative->cCondDepth > 0 && pReNative->cCondDepth <= RT_ELEMENTS(pReNative->aCondStack)); PIEMNATIVECOND const pEntry = &pReNative->aCondStack[pReNative->cCondDepth - 1]; /* * Now we have find common group with the core state at the end of the * if-final. Use the smallest common denominator and just drop anything * that isn't the same in both states. */ /** @todo We could, maybe, shuffle registers around if we thought it helpful, * which is why we're doing this at the end of the else-block. * But we'd need more info about future for that to be worth the effort. */ PCIEMNATIVECORESTATE const pOther = pEntry->fInElse ? &pEntry->IfFinalState : &pEntry->InitialState; if (memcmp(&pReNative->Core, pOther, sizeof(*pOther)) != 0) { /* shadow guest stuff first. */ uint64_t fGstRegs = pReNative->Core.bmGstRegShadows; if (fGstRegs) { Assert(pReNative->Core.bmHstRegsWithGstShadow != 0); do { unsigned idxGstReg = ASMBitFirstSetU64(fGstRegs) - 1; fGstRegs &= ~RT_BIT_64(idxGstReg); uint8_t const idxHstReg = pReNative->Core.aidxGstRegShadows[idxGstReg]; if ( !(pOther->bmGstRegShadows & RT_BIT_64(idxGstReg)) || idxHstReg != pOther->aidxGstRegShadows[idxGstReg]) { Log12(("iemNativeEmitEndIf: dropping gst %#RX64 from hst %s\n", g_aGstShadowInfo[idxGstReg].pszName, g_apszIemNativeHstRegNames[idxHstReg])); iemNativeRegClearGstRegShadowing(pReNative, idxHstReg, off); } } while (fGstRegs); } else Assert(pReNative->Core.bmHstRegsWithGstShadow == 0); /* Check variables next. For now we must require them to be identical or stuff we can recreate. */ Assert(pReNative->Core.u64ArgVars == pOther->u64ArgVars); uint32_t fVars = pReNative->Core.bmVars | pOther->bmVars; if (fVars) { uint32_t const fVarsMustRemove = pReNative->Core.bmVars ^ pOther->bmVars; do { unsigned idxVar = ASMBitFirstSetU32(fVars) - 1; fVars &= ~RT_BIT_32(idxVar); if (!(fVarsMustRemove & RT_BIT_32(idxVar))) { if (pReNative->Core.aVars[idxVar].idxReg == pOther->aVars[idxVar].idxReg) continue; if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Stack) { uint8_t const idxHstReg = pReNative->Core.aVars[idxVar].idxReg; if (idxHstReg != UINT8_MAX) { pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxHstReg); pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; Log12(("iemNativeEmitEndIf: Dropping hst reg %s for var #%u\n", g_apszIemNativeHstRegNames[idxHstReg], idxVar)); } continue; } } else if (!(pReNative->Core.bmVars & RT_BIT_32(idxVar))) continue; /* Irreconcilable, so drop it. */ uint8_t const idxHstReg = pReNative->Core.aVars[idxVar].idxReg; if (idxHstReg != UINT8_MAX) { pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxHstReg); pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; Log12(("iemNativeEmitEndIf: Dropping hst reg %s for var #%u (also dropped)\n", g_apszIemNativeHstRegNames[idxHstReg], idxVar)); } Log11(("iemNativeEmitEndIf: Freeing variable #%u\n", idxVar)); pReNative->Core.bmVars &= ~RT_BIT_32(idxVar); } while (fVars); } /* Finally, check that the host register allocations matches. */ AssertMsgStmt(pReNative->Core.bmHstRegs == pOther->bmHstRegs, ("Core.bmHstRegs=%#x pOther->bmHstRegs=%#x - %#x\n", pReNative->Core.bmHstRegs, pOther->bmHstRegs, pReNative->Core.bmHstRegs ^ pOther->bmHstRegs), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_COND_ENDIF_RECONCILIATION_FAILED)); } /* * Define the endif label and maybe the else one if we're still in the 'if' part. */ if (!pEntry->fInElse) iemNativeLabelDefine(pReNative, pEntry->idxLabelElse, off); else Assert(pReNative->paLabels[pEntry->idxLabelElse].off <= off); iemNativeLabelDefine(pReNative, pEntry->idxLabelEndIf, off); /* Pop the conditional stack.*/ pReNative->cCondDepth -= 1; return off; } #define IEM_MC_IF_EFL_ANY_BITS_SET(a_fBits) \ off = iemNativeEmitIfEflagAnysBitsSet(pReNative, off, (a_fBits)); \ do { /** Emits code for IEM_MC_IF_EFL_ANY_BITS_SET. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagAnysBitsSet(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitsInEfl) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); /* Test and jump. */ off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfNoneSet(pReNative, off, idxEflReg, fBitsInEfl, pEntry->idxLabelElse); /* Free but don't flush the EFlags register. */ iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_EFL_NO_BITS_SET(a_fBits) \ off = iemNativeEmitIfEflagNoBitsSet(pReNative, off, (a_fBits)); \ do { /** Emits code for IEM_MC_IF_EFL_NO_BITS_SET. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagNoBitsSet(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitsInEfl) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); /* Test and jump. */ off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfAnySet(pReNative, off, idxEflReg, fBitsInEfl, pEntry->idxLabelElse); /* Free but don't flush the EFlags register. */ iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_EFL_BIT_SET(a_fBit) \ off = iemNativeEmitIfEflagsBitSet(pReNative, off, (a_fBit)); \ do { /** Emits code for IEM_MC_IF_EFL_BIT_SET. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagsBitSet(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1; Assert(RT_BIT_32(iBitNo) == fBitInEfl); /* Test and jump. */ off = iemNativeEmitTestBitInGprAndJmpToLabelIfNotSet(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse); /* Free but don't flush the EFlags register. */ iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_EFL_BIT_NOT_SET(a_fBit) \ off = iemNativeEmitIfEflagsBitNotSet(pReNative, off, (a_fBit)); \ do { /** Emits code for IEM_MC_IF_EFL_BIT_NOT_SET. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagsBitNotSet(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1; Assert(RT_BIT_32(iBitNo) == fBitInEfl); /* Test and jump. */ off = iemNativeEmitTestBitInGprAndJmpToLabelIfSet(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse); /* Free but don't flush the EFlags register. */ iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_EFL_BITS_EQ(a_fBit1, a_fBit2) \ off = iemNativeEmitIfEflagsTwoBitsEqual(pReNative, off, a_fBit1, a_fBit2, false /*fInverted*/); \ do { #define IEM_MC_IF_EFL_BITS_NE(a_fBit1, a_fBit2) \ off = iemNativeEmitIfEflagsTwoBitsEqual(pReNative, off, a_fBit1, a_fBit2, true /*fInverted*/); \ do { /** Emits code for IEM_MC_IF_EFL_BITS_EQ and IEM_MC_IF_EFL_BITS_NE. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagsTwoBitsEqual(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBit1InEfl, uint32_t fBit2InEfl, bool fInverted) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); unsigned const iBitNo1 = ASMBitFirstSetU32(fBit1InEfl) - 1; Assert(RT_BIT_32(iBitNo1) == fBit1InEfl); unsigned const iBitNo2 = ASMBitFirstSetU32(fBit2InEfl) - 1; Assert(RT_BIT_32(iBitNo2) == fBit2InEfl); Assert(iBitNo1 != iBitNo2); #ifdef RT_ARCH_AMD64 uint8_t const idxTmpReg = iemNativeRegAllocTmpImm(pReNative, &off, fBit1InEfl); off = iemNativeEmitAndGpr32ByGpr32(pReNative, off, idxTmpReg, idxEflReg); if (iBitNo1 > iBitNo2) off = iemNativeEmitShiftGpr32Right(pReNative, off, idxTmpReg, iBitNo1 - iBitNo2); else off = iemNativeEmitShiftGpr32Left(pReNative, off, idxTmpReg, iBitNo2 - iBitNo1); off = iemNativeEmitXorGpr32ByGpr32(pReNative, off, idxTmpReg, idxEflReg); #elif defined(RT_ARCH_ARM64) uint8_t const idxTmpReg = iemNativeRegAllocTmp(pReNative, &off); uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); /* and tmpreg, eflreg, #1< 32*/, 32 - iBitNo1, false /*f64Bit*/); /* eeyore tmpreg, eflreg, tmpreg, LSL/LSR, #abs(iBitNo2 - iBitNo1) */ if (iBitNo1 > iBitNo2) pu32CodeBuf[off++] = Armv8A64MkInstrEor(idxTmpReg, idxEflReg, idxTmpReg, false /*64bit*/, iBitNo1 - iBitNo2, kArmv8A64InstrShift_Lsr); else pu32CodeBuf[off++] = Armv8A64MkInstrEor(idxTmpReg, idxEflReg, idxTmpReg, false /*64bit*/, iBitNo2 - iBitNo1, kArmv8A64InstrShift_Lsl); IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); #else # error "Port me" #endif /* Test (bit #2 is set in tmpreg if not-equal) and jump. */ off = iemNativeEmitTestBitInGprAndJmpToLabelIfCc(pReNative, off, idxTmpReg, iBitNo2, pEntry->idxLabelElse, !fInverted /*fJmpIfSet*/); /* Free but don't flush the EFlags and tmp registers. */ iemNativeRegFreeTmp(pReNative, idxTmpReg); iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_EFL_BIT_NOT_SET_AND_BITS_EQ(a_fBit, a_fBit1, a_fBit2) \ off = iemNativeEmitIfEflagsBitNotSetAndTwoBitsEqual(pReNative, off, a_fBit, a_fBit1, a_fBit2, false /*fInverted*/); \ do { #define IEM_MC_IF_EFL_BIT_SET_OR_BITS_NE(a_fBit, a_fBit1, a_fBit2) \ off = iemNativeEmitIfEflagsBitNotSetAndTwoBitsEqual(pReNative, off, a_fBit, a_fBit1, a_fBit2, true /*fInverted*/); \ do { /** Emits code for IEM_MC_IF_EFL_BIT_NOT_SET_AND_BITS_EQ and * IEM_MC_IF_EFL_BIT_SET_OR_BITS_NE. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfEflagsBitNotSetAndTwoBitsEqual(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl, uint32_t fBit1InEfl, uint32_t fBit2InEfl, bool fInverted) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* We need an if-block label for the non-inverted variant. */ uint32_t const idxLabelIf = fInverted ? iemNativeLabelCreate(pReNative, kIemNativeLabelType_If, UINT32_MAX, pReNative->paLabels[pEntry->idxLabelElse].uData) : UINT32_MAX; /* Get the eflags. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); /* Translate the flag masks to bit numbers. */ unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1; Assert(RT_BIT_32(iBitNo) == fBitInEfl); unsigned const iBitNo1 = ASMBitFirstSetU32(fBit1InEfl) - 1; Assert(RT_BIT_32(iBitNo1) == fBit1InEfl); Assert(iBitNo1 != iBitNo); unsigned const iBitNo2 = ASMBitFirstSetU32(fBit2InEfl) - 1; Assert(RT_BIT_32(iBitNo2) == fBit2InEfl); Assert(iBitNo2 != iBitNo); Assert(iBitNo2 != iBitNo1); #ifdef RT_ARCH_AMD64 uint8_t const idxTmpReg = iemNativeRegAllocTmpImm(pReNative, &off, fBit1InEfl); /* This must come before we jump anywhere! */ #elif defined(RT_ARCH_ARM64) uint8_t const idxTmpReg = iemNativeRegAllocTmp(pReNative, &off); #endif /* Check for the lone bit first. */ if (!fInverted) off = iemNativeEmitTestBitInGprAndJmpToLabelIfSet(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse); else off = iemNativeEmitTestBitInGprAndJmpToLabelIfSet(pReNative, off, idxEflReg, iBitNo, idxLabelIf); /* Then extract and compare the other two bits. */ #ifdef RT_ARCH_AMD64 off = iemNativeEmitAndGpr32ByGpr32(pReNative, off, idxTmpReg, idxEflReg); if (iBitNo1 > iBitNo2) off = iemNativeEmitShiftGpr32Right(pReNative, off, idxTmpReg, iBitNo1 - iBitNo2); else off = iemNativeEmitShiftGpr32Left(pReNative, off, idxTmpReg, iBitNo2 - iBitNo1); off = iemNativeEmitXorGpr32ByGpr32(pReNative, off, idxTmpReg, idxEflReg); #elif defined(RT_ARCH_ARM64) uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); /* and tmpreg, eflreg, #1< 32*/, 32 - iBitNo1, false /*f64Bit*/); /* eeyore tmpreg, eflreg, tmpreg, LSL/LSR, #abs(iBitNo2 - iBitNo1) */ if (iBitNo1 > iBitNo2) pu32CodeBuf[off++] = Armv8A64MkInstrEor(idxTmpReg, idxEflReg, idxTmpReg, false /*64bit*/, iBitNo1 - iBitNo2, kArmv8A64InstrShift_Lsr); else pu32CodeBuf[off++] = Armv8A64MkInstrEor(idxTmpReg, idxEflReg, idxTmpReg, false /*64bit*/, iBitNo2 - iBitNo1, kArmv8A64InstrShift_Lsl); IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); #else # error "Port me" #endif /* Test (bit #2 is set in tmpreg if not-equal) and jump. */ off = iemNativeEmitTestBitInGprAndJmpToLabelIfCc(pReNative, off, idxTmpReg, iBitNo2, pEntry->idxLabelElse, !fInverted /*fJmpIfSet*/); /* Free but don't flush the EFlags and tmp registers. */ iemNativeRegFreeTmp(pReNative, idxTmpReg); iemNativeRegFreeTmp(pReNative, idxEflReg); /* Make a copy of the core state now as we start the if-block. */ iemNativeCondStartIfBlock(pReNative, off, idxLabelIf); return off; } #define IEM_MC_IF_CX_IS_NZ() \ off = iemNativeEmitIfCxIsNotZero(pReNative, off); \ do { /** Emits code for IEM_MC_IF_CX_IS_NZ. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfCxIsNotZero(PIEMRECOMPILERSTATE pReNative, uint32_t off) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); uint8_t const idxGstRcxReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + X86_GREG_xCX), kIemNativeGstRegUse_ReadOnly); off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfNoneSet(pReNative, off, idxGstRcxReg, UINT16_MAX, pEntry->idxLabelElse); iemNativeRegFreeTmp(pReNative, idxGstRcxReg); iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_ECX_IS_NZ() \ off = iemNativeEmitIfRcxEcxIsNotZero(pReNative, off, false /*f64Bit*/); \ do { #define IEM_MC_IF_RCX_IS_NZ() \ off = iemNativeEmitIfRcxEcxIsNotZero(pReNative, off, true /*f64Bit*/); \ do { /** Emits code for IEM_MC_IF_ECX_IS_NZ and IEM_MC_IF_RCX_IS_NZ. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfRcxEcxIsNotZero(PIEMRECOMPILERSTATE pReNative, uint32_t off, bool f64Bit) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); uint8_t const idxGstRcxReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + X86_GREG_xCX), kIemNativeGstRegUse_ReadOnly); off = iemNativeEmitTestIfGprIsZeroAndJmpToLabel(pReNative, off, idxGstRcxReg, f64Bit, pEntry->idxLabelElse); iemNativeRegFreeTmp(pReNative, idxGstRcxReg); iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_CX_IS_NZ_AND_EFL_BIT_SET(a_fBit) \ off = iemNativeEmitIfCxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, true /*fCheckIfSet*/); \ do { #define IEM_MC_IF_CX_IS_NZ_AND_EFL_BIT_NOT_SET(a_fBit) \ off = iemNativeEmitIfCxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, false /*fCheckIfSet*/); \ do { /** Emits code for IEM_MC_IF_CX_IS_NZ. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfCxIsNotZeroAndTestEflagsBit(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl, bool fCheckIfSet) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* We have to load both RCX and EFLAGS before we can start branching, otherwise we'll end up in the else-block with an inconsistent register allocator state. Doing EFLAGS first as it's more likely to be loaded, right? */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); uint8_t const idxGstRcxReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + X86_GREG_xCX), kIemNativeGstRegUse_ReadOnly); /** @todo we could reduce this to a single branch instruction by spending a * temporary register and some setnz stuff. Not sure if loops are * worth it. */ /* Check CX. */ off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfNoneSet(pReNative, off, idxGstRcxReg, UINT16_MAX, pEntry->idxLabelElse); /* Check the EFlags bit. */ unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1; Assert(RT_BIT_32(iBitNo) == fBitInEfl); off = iemNativeEmitTestBitInGprAndJmpToLabelIfCc(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse, !fCheckIfSet /*fJmpIfSet*/); iemNativeRegFreeTmp(pReNative, idxGstRcxReg); iemNativeRegFreeTmp(pReNative, idxEflReg); iemNativeCondStartIfBlock(pReNative, off); return off; } #define IEM_MC_IF_ECX_IS_NZ_AND_EFL_BIT_SET(a_fBit) \ off = iemNativeEmitIfRcxEcxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, true /*fCheckIfSet*/, false /*f64Bit*/); \ do { #define IEM_MC_IF_ECX_IS_NZ_AND_EFL_BIT_NOT_SET(a_fBit) \ off = iemNativeEmitIfRcxEcxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, false /*fCheckIfSet*/, false /*f64Bit*/); \ do { #define IEM_MC_IF_RCX_IS_NZ_AND_EFL_BIT_SET(a_fBit) \ off = iemNativeEmitIfRcxEcxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, true /*fCheckIfSet*/, true /*f64Bit*/); \ do { #define IEM_MC_IF_RCX_IS_NZ_AND_EFL_BIT_NOT_SET(a_fBit) \ off = iemNativeEmitIfRcxEcxIsNotZeroAndTestEflagsBit(pReNative, off, a_fBit, false /*fCheckIfSet*/, true /*f64Bit*/); \ do { /** Emits code for IEM_MC_IF_ECX_IS_NZ_AND_EFL_BIT_SET, * IEM_MC_IF_ECX_IS_NZ_AND_EFL_BIT_NOT_SET, * IEM_MC_IF_RCX_IS_NZ_AND_EFL_BIT_SET and * IEM_MC_IF_RCX_IS_NZ_AND_EFL_BIT_NOT_SET. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitIfRcxEcxIsNotZeroAndTestEflagsBit(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint32_t fBitInEfl, bool fCheckIfSet, bool f64Bit) { PIEMNATIVECOND const pEntry = iemNativeCondPushIf(pReNative); /* We have to load both RCX and EFLAGS before we can start branching, otherwise we'll end up in the else-block with an inconsistent register allocator state. Doing EFLAGS first as it's more likely to be loaded, right? */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); uint8_t const idxGstRcxReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + X86_GREG_xCX), kIemNativeGstRegUse_ReadOnly); /** @todo we could reduce this to a single branch instruction by spending a * temporary register and some setnz stuff. Not sure if loops are * worth it. */ /* Check RCX/ECX. */ off = iemNativeEmitTestIfGprIsZeroAndJmpToLabel(pReNative, off, idxGstRcxReg, f64Bit, pEntry->idxLabelElse); /* Check the EFlags bit. */ unsigned const iBitNo = ASMBitFirstSetU32(fBitInEfl) - 1; Assert(RT_BIT_32(iBitNo) == fBitInEfl); off = iemNativeEmitTestBitInGprAndJmpToLabelIfCc(pReNative, off, idxEflReg, iBitNo, pEntry->idxLabelElse, !fCheckIfSet /*fJmpIfSet*/); iemNativeRegFreeTmp(pReNative, idxGstRcxReg); iemNativeRegFreeTmp(pReNative, idxEflReg); iemNativeCondStartIfBlock(pReNative, off); return off; } /********************************************************************************************************************************* * Emitters for IEM_MC_ARG_XXX, IEM_MC_LOCAL, IEM_MC_LOCAL_CONST, ++ * *********************************************************************************************************************************/ /** Number of hidden arguments for CIMPL calls. * @note We're sufferning from the usual VBOXSTRICTRC fun on Windows. */ #if defined(VBOXSTRICTRC_STRICT_ENABLED) && defined(RT_OS_WINDOWS) && defined(RT_ARCH_AMD64) # define IEM_CIMPL_HIDDEN_ARGS 3 #else # define IEM_CIMPL_HIDDEN_ARGS 2 #endif #define IEM_MC_ARG(a_Type, a_Name, a_iArg) \ uint8_t const a_Name = iemNativeArgAlloc(pReNative, (a_iArg), sizeof(a_Type)) #define IEM_MC_ARG_CONST(a_Type, a_Name, a_Value, a_iArg) \ uint8_t const a_Name = iemNativeArgAllocConst(pReNative, (a_iArg), sizeof(a_Type), (a_Value)) #define IEM_MC_ARG_LOCAL_REF(a_Type, a_Name, a_iArg) \ uint8_t const a_Name = iemNativeArgAllocLocalRef(pReNative, (a_iArg), (a_Local)) #define IEM_MC_LOCAL(a_Type, a_Name) \ uint8_t const a_Name = iemNativeVarAlloc(pReNative, sizeof(a_Type)) #define IEM_MC_LOCAL_CONST(a_Type, a_Name, a_Value) \ uint8_t const a_Name = iemNativeVarAllocConst(pReNative, sizeof(a_Type), (a_Value)) /** * Gets the number of hidden arguments for an expected IEM_MC_CALL statement. */ DECLINLINE(uint8_t) iemNativeArgGetHiddenArgCount(PIEMRECOMPILERSTATE pReNative) { if (pReNative->fCImpl & IEM_CIMPL_F_CALLS_CIMPL) return IEM_CIMPL_HIDDEN_ARGS; if (pReNative->fCImpl & IEM_CIMPL_F_CALLS_AIMPL_WITH_FXSTATE) return 1; return 0; } /** * Internal work that allocates a variable with kind set to * kIemNativeVarKind_Invalid and no current stack allocation. * * The kind will either be set by the caller or later when the variable is first * assigned a value. */ static uint8_t iemNativeVarAllocInt(PIEMRECOMPILERSTATE pReNative, uint8_t cbType) { Assert(cbType > 0 && cbType <= 64); unsigned const idxVar = ASMBitFirstSetU32(~pReNative->Core.bmVars) - 1; AssertStmt(idxVar < RT_ELEMENTS(pReNative->Core.aVars), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_EXHAUSTED)); pReNative->Core.bmVars |= RT_BIT_32(idxVar); pReNative->Core.aVars[idxVar].enmKind = kIemNativeVarKind_Invalid; pReNative->Core.aVars[idxVar].cbVar = cbType; pReNative->Core.aVars[idxVar].idxStackSlot = UINT8_MAX; pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; pReNative->Core.aVars[idxVar].uArgNo = UINT8_MAX; pReNative->Core.aVars[idxVar].idxReferrerVar = UINT8_MAX; pReNative->Core.aVars[idxVar].enmGstReg = kIemNativeGstReg_End; pReNative->Core.aVars[idxVar].u.uValue = 0; return idxVar; } /** * Internal work that allocates an argument variable w/o setting enmKind. */ static uint8_t iemNativeArgAllocInt(PIEMRECOMPILERSTATE pReNative, uint8_t iArgNo, uint8_t cbType) { iArgNo += iemNativeArgGetHiddenArgCount(pReNative); AssertStmt(iArgNo < RT_ELEMENTS(pReNative->Core.aidxArgVars), IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_1)); AssertStmt(pReNative->Core.aidxArgVars[iArgNo] == UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_DUP_ARG_NO)); uint8_t const idxVar = iemNativeVarAllocInt(pReNative, cbType); pReNative->Core.aidxArgVars[iArgNo] = idxVar; pReNative->Core.aVars[idxVar].uArgNo = iArgNo; return idxVar; } /** * Changes the variable to a stack variable. * * Currently this is s only possible to do the first time the variable is used, * switching later is can be implemented but not done. * * @param pReNative The recompiler state. * @param idxVar The variable. * @throws VERR_IEM_VAR_OUT_OF_STACK_SLOTS, VERR_IEM_VAR_IPE_2 */ static void iemNativeVarSetKindToStack(PIEMRECOMPILERSTATE pReNative, uint8_t idxVar) { Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxVar))); if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Stack) { /* We could in theory transition from immediate to stack as well, but it would involve the caller doing work storing the value on the stack. So, till that's required we only allow transition from invalid. */ AssertStmt(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Invalid, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_2)); pReNative->Core.aVars[idxVar].enmKind = kIemNativeVarKind_Stack; if (pReNative->Core.aVars[idxVar].idxStackSlot == UINT8_MAX) { if (pReNative->Core.aVars[idxVar].cbVar <= sizeof(uint64_t)) { unsigned const iSlot = ASMBitFirstSetU32(~pReNative->Core.bmStack) - 1; AssertStmt(iSlot < IEMNATIVE_FRAME_VAR_SLOTS, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_OUT_OF_STACK_SLOTS)); pReNative->Core.bmStack |= RT_BIT_32(iSlot); pReNative->Core.aVars[idxVar].idxStackSlot = iSlot; return; } /* cbVar -> fBitAlignMask: 16 -> 1; 32 -> 3; 64 -> 7;*/ AssertCompile(RT_IS_POWER_OF_TWO(IEMNATIVE_FRAME_VAR_SLOTS)); /* If not we have to add an overflow check. */ Assert(pReNative->Core.aVars[idxVar].cbVar <= 64); uint32_t const fBitAlignMask = RT_BIT_32(ASMBitLastSetU32(pReNative->Core.aVars[idxVar].cbVar) - 4) - 1; uint32_t fBitAllocMask = RT_BIT_32((pReNative->Core.aVars[idxVar].cbVar + 7) >> 3) - 1; uint32_t bmStack = ~pReNative->Core.bmStack; while (bmStack != UINT32_MAX) { unsigned const iSlot = ASMBitFirstSetU32(bmStack) - 1; AssertStmt(iSlot < IEMNATIVE_FRAME_VAR_SLOTS, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_OUT_OF_STACK_SLOTS)); if (!(iSlot & fBitAlignMask)) { if ((bmStack & (fBitAllocMask << iSlot)) == (fBitAllocMask << iSlot)) { pReNative->Core.bmStack |= (fBitAllocMask << iSlot); pReNative->Core.aVars[idxVar].idxStackSlot = iSlot; return; } } bmStack |= fBitAlignMask << (iSlot & ~fBitAlignMask); } AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_OUT_OF_STACK_SLOTS)); } } } /** * Changes it to a variable with a constant value. * * This does not require stack storage as we know the value and can always * reload it, unless of course it's referenced. * * @param pReNative The recompiler state. * @param idxVar The variable. * @param uValue The immediate value. * @throws VERR_IEM_VAR_OUT_OF_STACK_SLOTS, VERR_IEM_VAR_IPE_2 */ static void iemNativeVarSetKindToConst(PIEMRECOMPILERSTATE pReNative, uint8_t idxVar, uint64_t uValue) { Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxVar))); if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_Immediate) { /* Only simple trasnsitions for now. */ AssertStmt(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Invalid, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_2)); pReNative->Core.aVars[idxVar].enmKind = kIemNativeVarKind_Immediate; } pReNative->Core.aVars[idxVar].u.uValue = uValue; } /** * Changes the variable to a reference (pointer) to @a idxOtherVar. * * @param pReNative The recompiler state. * @param idxVar The variable. * @param idxOtherVar The variable to take the (stack) address of. * * @throws VERR_IEM_VAR_OUT_OF_STACK_SLOTS, VERR_IEM_VAR_IPE_2 */ static void iemNativeVarSetKindToLocalRef(PIEMRECOMPILERSTATE pReNative, uint8_t idxVar, uint8_t idxOtherVar) { Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxVar))); Assert(idxOtherVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxOtherVar))); if (pReNative->Core.aVars[idxVar].enmKind != kIemNativeVarKind_VarRef) { /* Only simple trasnsitions for now. */ AssertStmt(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Invalid, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_2)); pReNative->Core.aVars[idxVar].enmKind = kIemNativeVarKind_Immediate; } pReNative->Core.aVars[idxVar].u.idxRefVar = idxOtherVar; /* Update the other variable, ensure it's a stack variable. */ /** @todo handle variables with const values... that's go boom now. */ pReNative->Core.aVars[idxOtherVar].idxReferrerVar = idxVar; iemNativeVarSetKindToStack(pReNative, idxOtherVar); } DECL_HIDDEN_THROW(uint8_t) iemNativeArgAlloc(PIEMRECOMPILERSTATE pReNative, uint8_t iArgNo, uint8_t cbType) { return iemNativeArgAllocInt(pReNative, iArgNo, cbType); } DECL_HIDDEN_THROW(uint8_t) iemNativeArgAllocConst(PIEMRECOMPILERSTATE pReNative, uint8_t iArgNo, uint8_t cbType, uint64_t uValue) { uint8_t const idxVar = iemNativeArgAllocInt(pReNative, iArgNo, cbType); iemNativeVarSetKindToConst(pReNative, idxVar, uValue); return idxVar; } DECL_HIDDEN_THROW(uint8_t) iemNativeArgAllocLocalRef(PIEMRECOMPILERSTATE pReNative, uint8_t iArgNo, uint8_t idxOtherVar) { AssertStmt( idxOtherVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxOtherVar)) && pReNative->Core.aVars[idxOtherVar].uArgNo == UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_1)); uint8_t const idxArgVar = iemNativeArgAlloc(pReNative, iArgNo, sizeof(uintptr_t)); iemNativeVarSetKindToLocalRef(pReNative, idxArgVar, idxOtherVar); return idxArgVar; } DECL_HIDDEN_THROW(uint8_t) iemNativeVarAlloc(PIEMRECOMPILERSTATE pReNative, uint8_t cbType) { uint8_t const idxVar = iemNativeVarAllocInt(pReNative, cbType); iemNativeVarSetKindToStack(pReNative, idxVar); return idxVar; } DECL_HIDDEN_THROW(uint8_t) iemNativeVarAllocConst(PIEMRECOMPILERSTATE pReNative, uint8_t cbType, uint64_t uValue) { uint8_t const idxVar = iemNativeVarAllocInt(pReNative, cbType); iemNativeVarSetKindToConst(pReNative, idxVar, uValue); return idxVar; } /** * Makes sure variable @a idxVar has a register assigned to it. * * @returns The host register number. * @param pReNative The recompiler state. * @param idxVar The variable. * @param poff Pointer to the instruction buffer offset. * In case a register needs to be freed up. */ DECL_HIDDEN_THROW(uint8_t) iemNativeVarAllocRegister(PIEMRECOMPILERSTATE pReNative, uint8_t idxVar, uint32_t *poff) { Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxVar))); uint8_t idxReg = pReNative->Core.aVars[idxVar].idxReg; if (idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs)) return idxReg; /* * We have to allocate a register for the variable, even if its a stack one * as we don't know if there are modification being made to it before its * finalized (todo: analyze and insert hints about that?). * * If we can, we try get the correct register for argument variables. This * is assuming that most argument variables are fetched as close as possible * to the actual call, so that there aren't any interfering hidden calls * (memory accesses, etc) inbetween. * * If we cannot or it's a variable, we make sure no argument registers * that will be used by this MC block will be allocated here, and we always * prefer non-volatile registers to avoid needing to spill stuff for internal * call. */ /** @todo Detect too early argument value fetches and warn about hidden * calls causing less optimal code to be generated in the python script. */ uint8_t const uArgNo = pReNative->Core.aVars[idxVar].uArgNo; if ( uArgNo < RT_ELEMENTS(g_aidxIemNativeCallRegs) && !(pReNative->Core.bmHstRegs & RT_BIT_32(g_aidxIemNativeCallRegs[uArgNo]))) idxReg = g_aidxIemNativeCallRegs[uArgNo]; else { uint32_t const fNotArgsMask = ~g_afIemNativeCallRegs[RT_MIN(pReNative->cArgs, IEMNATIVE_CALL_ARG_GREG_COUNT)]; uint32_t const fRegs = ~pReNative->Core.bmHstRegs & ~pReNative->Core.bmHstRegsWithGstShadow & (~IEMNATIVE_REG_FIXED_MASK & IEMNATIVE_HST_GREG_MASK) & fNotArgsMask; if (fRegs) { /* Pick from the top as that both arm64 and amd64 have a block of non-volatile registers there. */ idxReg = (uint8_t)ASMBitLastSetU32( fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK ? fRegs & ~IEMNATIVE_CALL_VOLATILE_GREG_MASK : fRegs) - 1; Assert(pReNative->Core.aHstRegs[idxReg].fGstRegShadows == 0); Assert(!(pReNative->Core.bmHstRegsWithGstShadow & RT_BIT_32(idxReg))); } else { idxReg = iemNativeRegAllocFindFree(pReNative, poff, false /*fPreferVolatile*/, IEMNATIVE_HST_GREG_MASK & ~IEMNATIVE_REG_FIXED_MASK & fNotArgsMask); AssertStmt(idxReg != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_ALLOCATOR_NO_FREE_VAR)); } } iemNativeRegMarkAllocated(pReNative, idxReg, kIemNativeWhat_Var, idxVar); pReNative->Core.aVars[idxVar].idxReg = idxReg; return idxReg; } /********************************************************************************************************************************* * Emitters for IEM_MC_CALL_CIMPL_XXX * *********************************************************************************************************************************/ /** * Emits code to load a reference to the given guest register into @a idxGprDst. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitLeaGprByGstRegRef(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxGprDst, IEMNATIVEGSTREGREF enmClass, uint8_t idxRegInClass) { /* * Get the offset relative to the CPUMCTX structure. */ uint32_t offCpumCtx; switch (enmClass) { case kIemNativeGstRegRef_Gpr: Assert(idxRegInClass < 16); offCpumCtx = RT_UOFFSETOF_DYN(CPUMCTX, aGRegs[idxRegInClass]); break; case kIemNativeGstRegRef_GprHighByte: /**< AH, CH, DH, BH*/ Assert(idxRegInClass < 4); offCpumCtx = RT_UOFFSETOF_DYN(CPUMCTX, aGRegs[0].bHi) + idxRegInClass * sizeof(CPUMCTXGREG); break; case kIemNativeGstRegRef_EFlags: Assert(idxRegInClass == 0); offCpumCtx = RT_UOFFSETOF(CPUMCTX, eflags); break; case kIemNativeGstRegRef_MxCsr: Assert(idxRegInClass == 0); offCpumCtx = RT_UOFFSETOF(CPUMCTX, XState.x87.MXCSR); break; case kIemNativeGstRegRef_FpuReg: Assert(idxRegInClass < 8); AssertFailed(); /** @todo what kind of indexing? */ offCpumCtx = RT_UOFFSETOF_DYN(CPUMCTX, XState.x87.aRegs[idxRegInClass]); break; case kIemNativeGstRegRef_MReg: Assert(idxRegInClass < 8); AssertFailed(); /** @todo what kind of indexing? */ offCpumCtx = RT_UOFFSETOF_DYN(CPUMCTX, XState.x87.aRegs[idxRegInClass]); break; case kIemNativeGstRegRef_XReg: Assert(idxRegInClass < 16); offCpumCtx = RT_UOFFSETOF_DYN(CPUMCTX, XState.x87.aXMM[idxRegInClass]); break; default: AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_5)); } /* * Load the value into the destination register. */ #ifdef RT_ARCH_AMD64 off = iemNativeEmitLeaGprByVCpu(pReNative, off, idxGprDst, offCpumCtx + RT_UOFFSETOF(VMCPUCC, cpum.GstCtx)); #elif defined(RT_ARCH_ARM64) uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); Assert(offCpumCtx < 4096); pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(false /*fSub*/, idxGprDst, IEMNATIVE_REG_FIXED_PCPUMCTX, offCpumCtx); #else # error "Port me!" #endif return off; } /** * Common code for CIMPL and AIMPL calls. * * These are calls that uses argument variables and such. They should not be * confused with internal calls required to implement an MC operation, * like a TLB load and similar. * * Upon return all that is left to do is to load any hidden arguments and * perform the call. All argument variables are freed. * * @returns New code buffer offset; throws VBox status code on error. * @param pReNative The native recompile state. * @param off The code buffer offset. * @param cArgs The total nubmer of arguments (includes hidden * count). * @param cHiddenArgs The number of hidden arguments. The hidden * arguments must not have any variable declared for * them, whereas all the regular arguments must * (tstIEMCheckMc ensures this). */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitCallCommon(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cArgs, uint8_t cHiddenArgs) { #ifdef VBOX_STRICT /* * Assert sanity. */ Assert(cArgs <= IEMNATIVE_CALL_MAX_ARG_COUNT); Assert(cHiddenArgs < IEMNATIVE_CALL_ARG_GREG_COUNT); for (unsigned i = 0; i < cHiddenArgs; i++) Assert(pReNative->Core.aidxArgVars[i] == UINT8_MAX); for (unsigned i = cHiddenArgs; i < cArgs; i++) { Assert(pReNative->Core.aidxArgVars[i] != UINT8_MAX); /* checked by tstIEMCheckMc.cpp */ Assert(pReNative->Core.bmVars & RT_BIT_32(pReNative->Core.aidxArgVars[i])); } #endif uint8_t const cRegArgs = RT_MIN(cArgs, RT_ELEMENTS(g_aidxIemNativeCallRegs)); /* * First, go over the host registers that will be used for arguments and make * sure they either hold the desired argument or are free. */ if (pReNative->Core.bmHstRegs & g_afIemNativeCallRegs[cRegArgs]) for (uint32_t i = 0; i < cRegArgs; i++) { uint8_t const idxArgReg = g_aidxIemNativeCallRegs[i]; if (pReNative->Core.bmHstRegs & RT_BIT_32(idxArgReg)) { if (pReNative->Core.aHstRegs[idxArgReg].enmWhat == kIemNativeWhat_Var) { uint8_t const idxVar = pReNative->Core.aHstRegs[idxArgReg].idxVar; Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars)); Assert(pReNative->Core.aVars[idxVar].idxReg == idxArgReg); uint8_t const uArgNo = pReNative->Core.aVars[idxVar].uArgNo; if (uArgNo == i) { /* prefect */ } else { /* The variable allocator logic should make sure this is impossible. */ AssertStmt(uArgNo == UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_10)); if (pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack) off = iemNativeRegMoveOrSpillStackVar(pReNative, off, idxVar); else { /* just free it, can be reloaded if used again */ pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; pReNative->Core.bmHstRegs &= ~RT_BIT_32(idxArgReg); iemNativeRegClearGstRegShadowing(pReNative, idxArgReg, off); } } } else AssertStmt(pReNative->Core.aHstRegs[idxArgReg].enmWhat == kIemNativeWhat_Arg, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_REG_IPE_8)); } } Assert(!(pReNative->Core.bmHstRegs & g_afIemNativeCallRegs[cHiddenArgs])); /* No variables for hidden arguments. */ /* * Make sure the argument variables are loaded into their respective registers. * * We can optimize this by ASSUMING that any register allocations are for * registeres that have already been loaded and are ready. The previous step * saw to that. */ if (~pReNative->Core.bmHstRegs & (g_afIemNativeCallRegs[cRegArgs] & ~g_afIemNativeCallRegs[cHiddenArgs])) for (unsigned i = cHiddenArgs; i < cRegArgs; i++) { uint8_t const idxArgReg = g_aidxIemNativeCallRegs[i]; if (pReNative->Core.bmHstRegs & RT_BIT_32(idxArgReg)) Assert( pReNative->Core.aHstRegs[idxArgReg].idxVar == pReNative->Core.aidxArgVars[i] && pReNative->Core.aVars[pReNative->Core.aidxArgVars[i]].uArgNo == i && pReNative->Core.aVars[pReNative->Core.aidxArgVars[i]].idxReg == idxArgReg); else { uint8_t const idxVar = pReNative->Core.aidxArgVars[i]; if (pReNative->Core.aVars[idxVar].idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs)) { Assert(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack); off = iemNativeEmitLoadGprFromGpr(pReNative, off, idxArgReg, pReNative->Core.aVars[idxVar].idxReg); pReNative->Core.bmHstRegs = (pReNative->Core.bmHstRegs & ~RT_BIT_32(pReNative->Core.aVars[idxVar].idxReg)) | RT_BIT_32(idxArgReg); pReNative->Core.aVars[idxVar].idxReg = idxArgReg; } else { /* Use ARG0 as temp for stuff we need registers for. */ switch (pReNative->Core.aVars[idxVar].enmKind) { case kIemNativeVarKind_Stack: AssertStmt(pReNative->Core.aVars[idxVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_3)); off = iemNativeEmitLoadGprByBp(pReNative, off, idxArgReg, IEMNATIVE_FP_OFF_STACK_VARS + pReNative->Core.aVars[idxVar].idxStackSlot * sizeof(uint64_t)); continue; case kIemNativeVarKind_Immediate: off = iemNativeEmitLoadGprImm64(pReNative, off, idxArgReg, pReNative->Core.aVars[idxVar].u.uValue); continue; case kIemNativeVarKind_VarRef: { uint8_t const idxOtherVar = pReNative->Core.aVars[idxVar].u.idxRefVar; Assert(idxOtherVar < RT_ELEMENTS(pReNative->Core.aVars)); AssertStmt(pReNative->Core.aVars[idxOtherVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_4)); off = iemNativeEmitLeaGprByBp(pReNative, off, idxArgReg, IEMNATIVE_FP_OFF_STACK_VARS + pReNative->Core.aVars[idxOtherVar].idxStackSlot * sizeof(uint64_t)); continue; } case kIemNativeVarKind_GstRegRef: off = iemNativeEmitLeaGprByGstRegRef(pReNative, off, idxArgReg, pReNative->Core.aVars[idxVar].u.GstRegRef.enmClass, pReNative->Core.aVars[idxVar].u.GstRegRef.idx); continue; case kIemNativeVarKind_Invalid: case kIemNativeVarKind_End: break; } AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_3)); } } } #ifdef VBOX_STRICT else for (unsigned i = cHiddenArgs; i < cRegArgs; i++) { Assert(pReNative->Core.aVars[pReNative->Core.aidxArgVars[i]].uArgNo == i); Assert(pReNative->Core.aVars[pReNative->Core.aidxArgVars[i]].idxReg == g_aidxIemNativeCallRegs[i]); } #endif #ifdef IEMNATIVE_FP_OFF_STACK_ARG0 /* * If there are any stack arguments, make sure they are in their place as well. * * We can use IEMNATIVE_CALL_ARG0_GREG as temporary register since it the * caller will load it later and it must be free (see first loop). */ if (cArgs > IEMNATIVE_CALL_ARG_GREG_COUNT) for (unsigned i = IEMNATIVE_CALL_ARG_GREG_COUNT; i < cArgs; i++) { uint8_t const idxVar = pReNative->Core.aidxArgVars[i]; int32_t const offBpDisp = g_aoffIemNativeCallStackArgBpDisp[i - IEMNATIVE_CALL_ARG_GREG_COUNT]; if (pReNative->Core.aVars[idxVar].idxReg < RT_ELEMENTS(pReNative->Core.aHstRegs)) { Assert(pReNative->Core.aVars[idxVar].enmKind == kIemNativeVarKind_Stack); /* Imm as well? */ off = iemNativeEmitStoreGprByBp(pReNative, off, offBpDisp, pReNative->Core.aVars[idxVar].idxReg); pReNative->Core.bmHstRegs &= ~RT_BIT_32(pReNative->Core.aVars[idxVar].idxReg); pReNative->Core.aVars[idxVar].idxReg = UINT8_MAX; } else { /* Use ARG0 as temp for stuff we need registers for. */ switch (pReNative->Core.aVars[idxVar].enmKind) { case kIemNativeVarKind_Stack: AssertStmt(pReNative->Core.aVars[idxVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_3)); off = iemNativeEmitLoadGprByBp(pReNative, off, IEMNATIVE_CALL_ARG0_GREG /* is free */, IEMNATIVE_FP_OFF_STACK_VARS + pReNative->Core.aVars[idxVar].idxStackSlot * sizeof(uint64_t)); off = iemNativeEmitStoreGprByBp(pReNative, off, offBpDisp, IEMNATIVE_CALL_ARG0_GREG); continue; case kIemNativeVarKind_Immediate: off = iemNativeEmitStoreImm64ByBp(pReNative, off, offBpDisp, pReNative->Core.aVars[idxVar].u.uValue); continue; case kIemNativeVarKind_VarRef: { uint8_t const idxOtherVar = pReNative->Core.aVars[idxVar].u.idxRefVar; Assert(idxOtherVar < RT_ELEMENTS(pReNative->Core.aVars)); AssertStmt(pReNative->Core.aVars[idxOtherVar].idxStackSlot != UINT8_MAX, IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_4)); off = iemNativeEmitLeaGprByBp(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_FP_OFF_STACK_VARS + pReNative->Core.aVars[idxOtherVar].idxStackSlot * sizeof(uint64_t)); off = iemNativeEmitStoreGprByBp(pReNative, off, offBpDisp, IEMNATIVE_CALL_ARG0_GREG); continue; } case kIemNativeVarKind_GstRegRef: off = iemNativeEmitLeaGprByGstRegRef(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, pReNative->Core.aVars[idxVar].u.GstRegRef.enmClass, pReNative->Core.aVars[idxVar].u.GstRegRef.idx); off = iemNativeEmitStoreGprByBp(pReNative, off, offBpDisp, IEMNATIVE_CALL_ARG0_GREG); continue; case kIemNativeVarKind_Invalid: case kIemNativeVarKind_End: break; } AssertFailedStmt(IEMNATIVE_DO_LONGJMP(pReNative, VERR_IEM_VAR_IPE_3)); } } #else AssertCompile(IEMNATIVE_CALL_MAX_ARG_COUNT <= IEMNATIVE_CALL_ARG_GREG_COUNT); #endif /* * Free all argument variables (simplified). * Their lifetime always expires with the call they are for. */ /** @todo Make the python script check that arguments aren't used after * IEM_MC_CALL_XXXX. */ /** @todo There is a special with IEM_MC_MEM_MAP_U16_RW and friends requiring * a IEM_MC_MEM_COMMIT_AND_UNMAP_RW after a AIMPL call typically with * an argument value. */ for (uint32_t i = cHiddenArgs; i < cArgs; i++) { uint8_t idxVar = pReNative->Core.aidxArgVars[i]; Assert(idxVar < RT_ELEMENTS(pReNative->Core.aVars)); pReNative->Core.aidxArgVars[i] = UINT8_MAX; pReNative->Core.bmVars &= ~RT_BIT_32(idxVar); } Assert(pReNative->Core.u64ArgVars == UINT64_MAX); /* * Flush volatile registers as we make the call. */ off = iemNativeRegMoveAndFreeAndFlushAtCall(pReNative, off, cRegArgs); return off; } /** Common emit function for IEM_MC_CALL_CIMPL_XXXX. */ DECL_HIDDEN_THROW(uint32_t) iemNativeEmitCallCImplCommon(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t cArgs) { /* * Do all the call setup and cleanup. */ off = iemNativeEmitCallCommon(pReNative, off, cArgs + IEM_CIMPL_HIDDEN_ARGS, IEM_CIMPL_HIDDEN_ARGS); /* * Load the two hidden arguments. */ #if defined(VBOXSTRICTRC_STRICT_ENABLED) && defined(RT_OS_WINDOWS) && defined(RT_ARCH_AMD64) off = iemNativeEmitLeaGprByBp(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict */ off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG2_GREG, cbInstr); #else off = iemNativeEmitLoadGprFromGpr(pReNative, off, IEMNATIVE_CALL_ARG0_GREG, IEMNATIVE_REG_FIXED_PVMCPU); off = iemNativeEmitLoadGpr8Imm(pReNative, off, IEMNATIVE_CALL_ARG1_GREG, cbInstr); #endif /* * Make the call and check the return code. * * Shadow PC copies are always flushed here, other stuff depends on flags. * Segment and general purpose registers are explictily flushed via the * IEM_MC_HINT_FLUSH_GUEST_SHADOW_GREG and IEM_MC_HINT_FLUSH_GUEST_SHADOW_SREG * macros. */ off = iemNativeEmitCallImm(pReNative, off, (uintptr_t)pfnCImpl); #if defined(VBOXSTRICTRC_STRICT_ENABLED) && defined(RT_OS_WINDOWS) && defined(RT_ARCH_AMD64) off = iemNativeEmitLoadGprByBpU32(pReNative, off, X86_GREG_xAX, IEMNATIVE_FP_OFF_IN_SHADOW_ARG0); /* rcStrict (see above) */ #endif fGstShwFlush = iemNativeCImplFlagsToGuestShadowFlushMask(pReNative->fCImpl, fGstShwFlush | RT_BIT_64(kIemNativeGstReg_Pc)); if (!(pReNative->fMc & IEM_MC_F_WITHOUT_FLAGS)) /** @todo We don't emit with-flags/without-flags variations for CIMPL calls. */ fGstShwFlush |= RT_BIT_64(kIemNativeGstReg_EFlags); iemNativeRegFlushGuestShadows(pReNative, fGstShwFlush); return iemNativeEmitCheckCallRetAndPassUp(pReNative, off, idxInstr); } #define IEM_MC_CALL_CIMPL_1_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0) \ off = iemNativeEmitCallCImpl1(pReNative, off, a_cbInstr, pCallEntry->idxInstr, a_fGstShwFlush, (uintptr_t)a_pfnCImpl, a0) /** Emits code for IEM_MC_CALL_CIMPL_1. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitCallCImpl1(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t idxArg0) { Assert(idxArg0 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg0))); Assert(pReNative->Core.aVars[idxArg0].uArgNo == 0 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg0); return iemNativeEmitCallCImplCommon(pReNative, off, cbInstr, idxInstr, fGstShwFlush, pfnCImpl, 1); } #define IEM_MC_CALL_CIMPL_2_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1) \ off = iemNativeEmitCallCImpl2(pReNative, off, a_cbInstr, pCallEntry->idxInstr, a_fGstShwFlush, (uintptr_t)a_pfnCImpl, a0, a1) /** Emits code for IEM_MC_CALL_CIMPL_2. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitCallCImpl2(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t idxArg0, uint8_t idxArg1) { Assert(idxArg0 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg0))); Assert(pReNative->Core.aVars[idxArg0].uArgNo == 0 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg0); Assert(idxArg1 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg1))); Assert(pReNative->Core.aVars[idxArg1].uArgNo == 1 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg1); return iemNativeEmitCallCImplCommon(pReNative, off, cbInstr, idxInstr, fGstShwFlush, pfnCImpl, 2); } #define IEM_MC_CALL_CIMPL_3_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1, a2) \ off = iemNativeEmitCallCImpl3(pReNative, off, a_cbInstr, pCallEntry->idxInstr, a_fGstShwFlush, \ (uintptr_t)a_pfnCImpl, a0, a1, a2) /** Emits code for IEM_MC_CALL_CIMPL_3. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitCallCImpl3(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t idxArg0, uint8_t idxArg1, uint8_t idxArg2) { pReNative->pInstrBuf[off++] = 0xcc; Assert(idxArg0 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg0))); Assert(pReNative->Core.aVars[idxArg0].uArgNo == 0 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg0); Assert(idxArg1 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg1))); Assert(pReNative->Core.aVars[idxArg1].uArgNo == 1 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg1); Assert(idxArg2 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg2))); Assert(pReNative->Core.aVars[idxArg2].uArgNo == 2 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg2); return iemNativeEmitCallCImplCommon(pReNative, off, cbInstr, idxInstr, fGstShwFlush, pfnCImpl, 3); } #define IEM_MC_CALL_CIMPL_4_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1, a2, a3) \ off = iemNativeEmitCallCImpl4(pReNative, off, a_cbInstr, pCallEntry->idxInstr, a_fGstShwFlush, \ (uintptr_t)a_pfnCImpl, a0, a1, a2, a3) /** Emits code for IEM_MC_CALL_CIMPL_4. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitCallCImpl4(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t idxArg0, uint8_t idxArg1, uint8_t idxArg2, uint8_t idxArg3) { pReNative->pInstrBuf[off++] = 0xcc; Assert(idxArg0 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg0))); Assert(pReNative->Core.aVars[idxArg0].uArgNo == 0 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg0); Assert(idxArg1 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg1))); Assert(pReNative->Core.aVars[idxArg1].uArgNo == 1 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg1); Assert(idxArg2 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg2))); Assert(pReNative->Core.aVars[idxArg2].uArgNo == 2 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg2); Assert(idxArg3 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg3))); Assert(pReNative->Core.aVars[idxArg3].uArgNo == 3 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg3); return iemNativeEmitCallCImplCommon(pReNative, off, cbInstr, idxInstr, fGstShwFlush, pfnCImpl, 4); } #define IEM_MC_CALL_CIMPL_5_THREADED(a_cbInstr, a_fFlags, a_fGstShwFlush, a_pfnCImpl, a0, a1, a2, a3, a4) \ off = iemNativeEmitCallCImpl5(pReNative, off, a_cbInstr, pCallEntry->idxInstr, a_fGstShwFlush, \ (uintptr_t)a_pfnCImpl, a0, a1, a2, a3, a4) /** Emits code for IEM_MC_CALL_CIMPL_4. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitCallCImpl5(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t cbInstr, uint8_t idxInstr, uint64_t fGstShwFlush, uintptr_t pfnCImpl, uint8_t idxArg0, uint8_t idxArg1, uint8_t idxArg2, uint8_t idxArg3, uint8_t idxArg4) { pReNative->pInstrBuf[off++] = 0xcc; Assert(idxArg0 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg0))); Assert(pReNative->Core.aVars[idxArg0].uArgNo == 0 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg0); Assert(idxArg1 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg1))); Assert(pReNative->Core.aVars[idxArg1].uArgNo == 1 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg1); Assert(idxArg2 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg2))); Assert(pReNative->Core.aVars[idxArg2].uArgNo == 2 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg2); Assert(idxArg3 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg3))); Assert(pReNative->Core.aVars[idxArg3].uArgNo == 3 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg3); Assert(idxArg4 < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxArg4))); Assert(pReNative->Core.aVars[idxArg4].uArgNo == 4 + IEM_CIMPL_HIDDEN_ARGS); RT_NOREF_PV(idxArg4); return iemNativeEmitCallCImplCommon(pReNative, off, cbInstr, idxInstr, fGstShwFlush, pfnCImpl, 5); } /** Recompiler debugging: Flush guest register shadow copies. */ #define IEM_MC_HINT_FLUSH_GUEST_SHADOW(g_fGstShwFlush) iemNativeRegFlushGuestShadows(pReNative, g_fGstShwFlush) /********************************************************************************************************************************* * Emitters for general purpose register fetches (IEM_MC_FETCH_GREG_XXX). * *********************************************************************************************************************************/ #define IEM_MC_FETCH_GREG_U16(a_u16Dst, a_iGReg) \ off = iemNativeEmitFetchGregU16(pReNative, off, a_u16Dst, a_iGReg) /** Emits code for IEM_MC_FETCH_GREG_U16. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitFetchGregU16(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t idxDstVar, uint8_t iGReg) { Assert(idxDstVar < RT_ELEMENTS(pReNative->Core.aVars) && (pReNative->Core.bmVars & RT_BIT_32(idxDstVar))); Assert(pReNative->Core.aVars[idxDstVar].cbVar == sizeof(uint16_t)); /* * We can either just load the low 16-bit of the GPR into a host register * for the variable, or we can do so via a shadow copy host register. The * latter will avoid having to reload it if it's being stored later, but * will waste a host register if it isn't touched again. Since we don't * know what going to happen, we choose the latter for now. */ uint8_t const idxGstFullReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + iGReg), kIemNativeGstRegUse_ReadOnly); iemNativeVarSetKindToStack(pReNative, idxDstVar); uint8_t const idxVarReg = iemNativeVarAllocRegister(pReNative, idxDstVar, &off); off = iemNativeEmitLoadGprFromGpr16(pReNative, off, idxVarReg, idxGstFullReg); iemNativeRegFreeTmp(pReNative, idxGstFullReg); return off; } /********************************************************************************************************************************* * Emitters for general purpose register stores (IEM_MC_STORE_GREG_XXX). * *********************************************************************************************************************************/ #define IEM_MC_STORE_GREG_U8_CONST_THREADED(a_iGRegEx, a_u8Value) \ off = iemNativeEmitStoreGregU8Const(pReNative, off, a_iGRegEx, a_u8Value) /** Emits code for IEM_MC_STORE_GREG_U8_CONST_THREADED. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitStoreGregU8Const(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t iGRegEx, uint8_t u8Value) { Assert(iGRegEx < 20); uint8_t const idxGstTmpReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + (iGRegEx & 15)), kIemNativeGstRegUse_ForUpdate); #ifdef RT_ARCH_AMD64 uint8_t * const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 12); /* To the lowest byte of the register: mov r8, imm8 */ if (iGRegEx < 16) { if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; else if (idxGstTmpReg >= 4) pbCodeBuf[off++] = X86_OP_REX; pbCodeBuf[off++] = 0xb0 + (idxGstTmpReg & 7); pbCodeBuf[off++] = u8Value; } /* Otherwise it's to ah, ch, dh or bh: use mov r8, imm8 if we can, otherwise, we rotate. */ else if (idxGstTmpReg < 4) { pbCodeBuf[off++] = 0xb4 + idxGstTmpReg; pbCodeBuf[off++] = u8Value; } else { /* ror reg64, 8 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxGstTmpReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 1, idxGstTmpReg & 7); pbCodeBuf[off++] = 8; /* mov reg8, imm8 */ if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; else if (idxGstTmpReg >= 4) pbCodeBuf[off++] = X86_OP_REX; pbCodeBuf[off++] = 0xb0 + (idxGstTmpReg & 7); pbCodeBuf[off++] = u8Value; /* rol reg64, 8 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxGstTmpReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxGstTmpReg & 7); pbCodeBuf[off++] = 8; } #elif defined(RT_ARCH_ARM64) uint8_t const idxImmReg = iemNativeRegAllocTmpImm(pReNative, &off, u8Value); uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); if (iGRegEx < 16) /* bfi w1, w2, 0, 8 - moves bits 7:0 from idxImmReg to idxGstTmpReg bits 7:0. */ pu32CodeBuf[off++] = Armv8A64MkInstrBfi(idxGstTmpReg, idxImmReg, 0, 8); else /* bfi w1, w2, 8, 8 - moves bits 7:0 from idxImmReg to idxGstTmpReg bits 15:8. */ pu32CodeBuf[off++] = Armv8A64MkInstrBfi(idxGstTmpReg, idxImmReg, 8, 8); iemNativeRegFreeTmp(pReNative, idxImmReg); #else # error "Port me!" #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxGstTmpReg, RT_UOFFSETOF_DYN(VMCPU, cpum.GstCtx.aGRegs[iGRegEx & 15])); iemNativeRegFreeTmp(pReNative, idxGstTmpReg); return off; } #if 0 #define IEM_MC_STORE_GREG_U16(a_iGReg, a_u16Value) \ off = iemNativeEmitStoreGregU16Const(pReNative, off, a_iGReg, a_u16Value) /** Emits code for IEM_MC_STORE_GREG_U16. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitStoreGregU16(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t iGReg, uint8_t idxValueVar) { Assert(iGReg < 16) uint8_t const idxGstTmpReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + iGReg), kIemNativeGstRegUse_ForUpdate); #ifdef RT_ARCH_AMD64 uint8_t * const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 12); /* To the lowest byte of the register: mov r8, imm8 */ if (iGRegEx < 16) { if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; else if (idxGstTmpReg >= 4) pbCodeBuf[off++] = X86_OP_REX; pbCodeBuf[off++] = 0xb0 + (idxGstTmpReg & 7); pbCodeBuf[off++] = u8Value; } /* Otherwise it's to ah, ch, dh or bh: use mov r8, imm8 if we can, otherwise, we rotate. */ else if (idxGstTmpReg < 4) { pbCodeBuf[off++] = 0xb4 + idxGstTmpReg; pbCodeBuf[off++] = u8Value; } else { /* ror reg64, 8 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxGstTmpReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 1, idxGstTmpReg & 7); pbCodeBuf[off++] = 8; /* mov reg8, imm8 */ if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; else if (idxGstTmpReg >= 4) pbCodeBuf[off++] = X86_OP_REX; pbCodeBuf[off++] = 0xb0 + (idxGstTmpReg & 7); pbCodeBuf[off++] = u8Value; /* rol reg64, 8 */ pbCodeBuf[off++] = X86_OP_REX_W | (idxGstTmpReg < 8 ? 0 : X86_OP_REX_B); pbCodeBuf[off++] = 0xc1; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 0, idxGstTmpReg & 7); pbCodeBuf[off++] = 8; } #elif defined(RT_ARCH_ARM64) uint8_t const idxImmReg = iemNativeRegAllocTmpImm(pReNative, &off, u8Value); uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); if (iGRegEx < 16) /* bfi w1, w2, 0, 8 - moves bits 7:0 from idxImmReg to idxGstTmpReg bits 7:0. */ pu32CodeBuf[off++] = Armv8A64MkInstrBfi(idxGstTmpReg, idxImmReg, 0, 8); else /* bfi w1, w2, 8, 8 - moves bits 7:0 from idxImmReg to idxGstTmpReg bits 15:8. */ pu32CodeBuf[off++] = Armv8A64MkInstrBfi(idxGstTmpReg, idxImmReg, 8, 8); iemNativeRegFreeTmp(pReNative, idxImmReg); #else # error "Port me!" #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxGstTmpReg, RT_UOFFSETOF_DYN(VMCPU, cpum.GstCtx.aGRegs[iGRegEx & 15])); iemNativeRegFreeTmp(pReNative, idxGstTmpReg); return off; } #endif /********************************************************************************************************************************* * General purpose register manipulation (add, sub). * *********************************************************************************************************************************/ #define IEM_MC_SUB_GREG_U16(a_iGReg, a_u8SubtrahendConst) \ off = iemNativeEmitSubGregU16(pReNative, off, a_iGReg, a_u8SubtrahendConst) /** Emits code for IEM_MC_SUB_GREG_U16. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitSubGregU16(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t iGReg, uint8_t uSubtrahend) { uint8_t const idxGstTmpReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + iGReg), kIemNativeGstRegUse_ForUpdate); #ifdef RT_ARCH_AMD64 uint8_t * const pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 4); pbCodeBuf[off++] = X86_OP_PRF_SIZE_OP; if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; if (uSubtrahend) { pbCodeBuf[off++] = 0xff; /* dec */ pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 1, idxGstTmpReg & 7); } else { pbCodeBuf[off++] = 0x81; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 5, idxGstTmpReg & 7); pbCodeBuf[off++] = uSubtrahend; pbCodeBuf[off++] = 0; } #else uint8_t const idxTmpReg = iemNativeRegAllocTmp(pReNative, &off); uint32_t * const pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 2); /* sub tmp, gstgrp, uSubtrahend */ pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(true /*fSub*/, idxTmpReg, idxGstTmpReg, uSubtrahend, false /*f64Bit*/); /* bfi w1, w2, 0, 16 - moves bits 15:0 from tmpreg2 to tmpreg. */ pu32CodeBuf[off++] = Armv8A64MkInstrBfi(idxGstTmpReg, idxTmpReg, 0, 16); iemNativeRegFreeTmp(pReNative, idxTmpReg); #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxGstTmpReg, RT_UOFFSETOF_DYN(VMCPU, cpum.GstCtx.aGRegs[iGReg])); iemNativeRegFreeTmp(pReNative, idxGstTmpReg); return off; } #define IEM_MC_SUB_GREG_U32(a_iGReg, a_u8Const) \ off = iemNativeEmitSubGregU32U64(pReNative, off, a_iGReg, a_u8Const, false /*f64Bit*/) #define IEM_MC_SUB_GREG_U64(a_iGReg, a_u8Const) \ off = iemNativeEmitSubGregU32U64(pReNative, off, a_iGReg, a_u8Const, true /*f64Bit*/) /** Emits code for IEM_MC_SUB_GREG_U32 and IEM_MC_SUB_GREG_U64. */ DECL_INLINE_THROW(uint32_t) iemNativeEmitSubGregU32U64(PIEMRECOMPILERSTATE pReNative, uint32_t off, uint8_t iGReg, uint8_t uSubtrahend, bool f64Bit) { uint8_t const idxGstTmpReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, (IEMNATIVEGSTREG)(kIemNativeGstReg_GprFirst + iGReg), kIemNativeGstRegUse_ForUpdate); #ifdef RT_ARCH_AMD64 uint8_t *pbCodeBuf = iemNativeInstrBufEnsure(pReNative, off, 6); if (f64Bit) pbCodeBuf[off++] = X86_OP_REX_W | (idxGstTmpReg >= 8 ? X86_OP_REX_B : 0); else if (idxGstTmpReg >= 8) pbCodeBuf[off++] = X86_OP_REX_B; if (uSubtrahend == 1) { /* dec */ pbCodeBuf[off++] = 0xff; pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 1, idxGstTmpReg & 7); } else if (uSubtrahend < 128) { pbCodeBuf[off++] = 0x83; /* sub */ pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 5, idxGstTmpReg & 7); pbCodeBuf[off++] = RT_BYTE1(uSubtrahend); } else { pbCodeBuf[off++] = 0x81; /* sub */ pbCodeBuf[off++] = X86_MODRM_MAKE(X86_MOD_REG, 5, idxGstTmpReg & 7); pbCodeBuf[off++] = RT_BYTE1(uSubtrahend); pbCodeBuf[off++] = 0; pbCodeBuf[off++] = 0; pbCodeBuf[off++] = 0; } #else /* sub tmp, gstgrp, uSubtrahend */ uint32_t *pu32CodeBuf = iemNativeInstrBufEnsure(pReNative, off, 1); pu32CodeBuf[off++] = Armv8A64MkInstrAddSubUImm12(true /*fSub*/, idxGstTmpReg, idxGstTmpReg, uSubtrahend, f64Bit); #endif IEMNATIVE_ASSERT_INSTR_BUF_ENSURE(pReNative, off); off = iemNativeEmitStoreGprToVCpuU64(pReNative, off, idxGstTmpReg, RT_UOFFSETOF_DYN(VMCPU, cpum.GstCtx.aGRegs[iGReg])); iemNativeRegFreeTmp(pReNative, idxGstTmpReg); return off; } /********************************************************************************************************************************* * Builtin functions * *********************************************************************************************************************************/ /** * Built-in function that calls a C-implemention function taking zero arguments. */ static IEM_DECL_IEMNATIVERECOMPFUNC_DEF(iemNativeRecompFunc_BltIn_DeferToCImpl0) { PFNIEMCIMPL0 const pfnCImpl = (PFNIEMCIMPL0)(uintptr_t)pCallEntry->auParams[0]; uint8_t const cbInstr = (uint8_t)pCallEntry->auParams[1]; uint64_t const fGstShwFlush = (uint8_t)pCallEntry->auParams[2]; return iemNativeEmitCImplCall(pReNative, off, pCallEntry->idxInstr, fGstShwFlush, (uintptr_t)pfnCImpl, cbInstr, 0, 0, 0, 0); } /** * Built-in function that checks for pending interrupts that can be delivered or * forced action flags. * * This triggers after the completion of an instruction, so EIP is already at * the next instruction. If an IRQ or important FF is pending, this will return * a non-zero status that stops TB execution. */ static IEM_DECL_IEMNATIVERECOMPFUNC_DEF(iemNativeRecompFunc_BltIn_CheckIrq) { RT_NOREF(pCallEntry); /* It's too convenient to use iemNativeEmitTestBitInGprAndJmpToLabelIfNotSet below and I'm too lazy to create a 'Fixed' version of that one. */ uint32_t const idxLabelVmCheck = iemNativeLabelCreate(pReNative, kIemNativeLabelType_CheckIrq, UINT32_MAX, pReNative->uCheckIrqSeqNo++); uint32_t const idxLabelReturnBreak = iemNativeLabelCreate(pReNative, kIemNativeLabelType_ReturnBreak); /* Again, we need to load the extended EFLAGS before we actually need them in case we jump. We couldn't use iemNativeRegAllocTmpForGuestReg if we loaded them inside the check, as the shadow state would not be correct when the code branches before the load. Ditto PC. */ uint8_t const idxEflReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_EFlags, kIemNativeGstRegUse_ReadOnly); uint8_t const idxPcReg = iemNativeRegAllocTmpForGuestReg(pReNative, &off, kIemNativeGstReg_Pc, kIemNativeGstRegUse_ReadOnly); uint8_t idxTmpReg = iemNativeRegAllocTmp(pReNative, &off); /* * Start by checking the local forced actions of the EMT we're on for IRQs * and other FFs that needs servicing. */ /** @todo this isn't even close to the NMI and interrupt conditions in EM! */ /* Load FFs in to idxTmpReg and AND with all relevant flags. */ off = iemNativeEmitLoadGprFromVCpuU64(pReNative, off, idxTmpReg, RT_UOFFSETOF(VMCPUCC, fLocalForcedActions)); off = iemNativeEmitAndGprByImm(pReNative, off, idxTmpReg, VMCPU_FF_ALL_MASK & ~( VMCPU_FF_PGM_SYNC_CR3 | VMCPU_FF_PGM_SYNC_CR3_NON_GLOBAL | VMCPU_FF_TLB_FLUSH | VMCPU_FF_UNHALT ), true /*fSetFlags*/); /* If we end up with ZERO in idxTmpReg there is nothing to do.*/ uint32_t const offFixupJumpToVmCheck1 = off; off = iemNativeEmitJzToFixed(pReNative, off, 0); /* Some relevant FFs are set, but if's only APIC or/and PIC being set, these may be supressed by EFLAGS.IF or CPUMIsInInterruptShadow. */ off = iemNativeEmitAndGprByImm(pReNative, off, idxTmpReg, ~(VMCPU_FF_INTERRUPT_APIC | VMCPU_FF_INTERRUPT_PIC), true /*fSetFlags*/); /* Return VINF_IEM_REEXEC_BREAK if other FFs are set. */ off = iemNativeEmitJnzToLabel(pReNative, off, idxLabelReturnBreak); /* So, it's only interrupt releated FFs and we need to see if IRQs are being suppressed by the CPU or not. */ off = iemNativeEmitTestBitInGprAndJmpToLabelIfNotSet(pReNative, off, idxEflReg, X86_EFL_IF_BIT, idxLabelVmCheck); off = iemNativeEmitTestAnyBitsInGprAndJmpToLabelIfNoneSet(pReNative, off, idxEflReg, CPUMCTX_INHIBIT_SHADOW, idxLabelReturnBreak); /* We've got shadow flags set, so we must check that the PC they are valid for matches our current PC value. */ /** @todo AMD64 can do this more efficiently w/o loading uRipInhibitInt into * a register. */ off = iemNativeEmitLoadGprFromVCpuU64(pReNative, off, idxTmpReg, RT_UOFFSETOF(VMCPUCC, cpum.GstCtx.uRipInhibitInt)); off = iemNativeEmitTestIfGprNotEqualGprAndJmpToLabel(pReNative, off, idxTmpReg, idxPcReg, idxLabelReturnBreak); /* * Now check the force flags of the VM. */ iemNativeLabelDefine(pReNative, idxLabelVmCheck, off); iemNativeFixupFixedJump(pReNative, offFixupJumpToVmCheck1, off); off = iemNativeEmitLoadGprFromVCpuU64(pReNative, off, idxTmpReg, RT_UOFFSETOF(VMCPUCC, CTX_SUFF(pVM))); /* idxTmpReg = pVM */ off = iemNativeEmitLoadGpr32ByGpr(pReNative, off, idxTmpReg, idxTmpReg, RT_UOFFSETOF(VMCC, fGlobalForcedActions)); off = iemNativeEmitAndGpr32ByImm(pReNative, off, idxTmpReg, VM_FF_ALL_MASK, true /*fSetFlags*/); off = iemNativeEmitJnzToLabel(pReNative, off, idxLabelReturnBreak); /** @todo STAM_REL_COUNTER_INC(&pVCpu->iem.s.StatCheckIrqBreaks); */ /* * We're good, no IRQs or FFs pending. */ iemNativeRegFreeTmp(pReNative, idxTmpReg); iemNativeRegFreeTmp(pReNative, idxEflReg); iemNativeRegFreeTmp(pReNative, idxPcReg); return off; } /** * Built-in function checks if IEMCPU::fExec has the expected value. */ static IEM_DECL_IEMNATIVERECOMPFUNC_DEF(iemNativeRecompFunc_BltIn_CheckMode) { uint32_t const fExpectedExec = (uint32_t)pCallEntry->auParams[0]; uint8_t const idxTmpReg = iemNativeRegAllocTmp(pReNative, &off); off = iemNativeEmitLoadGprFromVCpuU32(pReNative, off, idxTmpReg, RT_UOFFSETOF(VMCPUCC, iem.s.fExec)); off = iemNativeEmitAndGpr32ByImm(pReNative, off, idxTmpReg, IEMTB_F_KEY_MASK); off = iemNativeEmitTestIfGpr32NotEqualImmAndJmpToNewLabel(pReNative, off, idxTmpReg, fExpectedExec & IEMTB_F_KEY_MASK, kIemNativeLabelType_ReturnBreak); iemNativeRegFreeTmp(pReNative, idxTmpReg); return off; } /********************************************************************************************************************************* * The native code generator functions for each MC block. * *********************************************************************************************************************************/ /* * Include g_apfnIemNativeRecompileFunctions and associated functions. * * This should probably live in it's own file later, but lets see what the * compile times turn out to be first. */ #include "IEMNativeFunctions.cpp.h" /********************************************************************************************************************************* * Recompiler Core. * *********************************************************************************************************************************/ /** @callback_method_impl{FNDISREADBYTES, Dummy.} */ static DECLCALLBACK(int) iemNativeDisasReadBytesDummy(PDISSTATE pDis, uint8_t offInstr, uint8_t cbMinRead, uint8_t cbMaxRead) { RT_BZERO(&pDis->Instr.ab[offInstr], cbMaxRead); pDis->cbCachedInstr += cbMaxRead; RT_NOREF(cbMinRead); return VERR_NO_DATA; } /** * Formats TB flags (IEM_F_XXX and IEMTB_F_XXX) to string. * @returns pszBuf. * @param fFlags The flags. * @param pszBuf The output buffer. * @param cbBuf The output buffer size. At least 32 bytes. */ DECLHIDDEN(const char *) iemTbFlagsToString(uint32_t fFlags, char *pszBuf, size_t cbBuf) RT_NOEXCEPT { Assert(cbBuf >= 32); static RTSTRTUPLE const s_aModes[] = { /* [00] = */ { RT_STR_TUPLE("16BIT") }, /* [01] = */ { RT_STR_TUPLE("32BIT") }, /* [02] = */ { RT_STR_TUPLE("!2!") }, /* [03] = */ { RT_STR_TUPLE("!3!") }, /* [04] = */ { RT_STR_TUPLE("16BIT_PRE_386") }, /* [05] = */ { RT_STR_TUPLE("32BIT_FLAT") }, /* [06] = */ { RT_STR_TUPLE("!6!") }, /* [07] = */ { RT_STR_TUPLE("!7!") }, /* [08] = */ { RT_STR_TUPLE("16BIT_PROT") }, /* [09] = */ { RT_STR_TUPLE("32BIT_PROT") }, /* [0a] = */ { RT_STR_TUPLE("64BIT") }, /* [0b] = */ { RT_STR_TUPLE("!b!") }, /* [0c] = */ { RT_STR_TUPLE("16BIT_PROT_PRE_386") }, /* [0d] = */ { RT_STR_TUPLE("32BIT_PROT_FLAT") }, /* [0e] = */ { RT_STR_TUPLE("!e!") }, /* [0f] = */ { RT_STR_TUPLE("!f!") }, /* [10] = */ { RT_STR_TUPLE("!10!") }, /* [11] = */ { RT_STR_TUPLE("!11!") }, /* [12] = */ { RT_STR_TUPLE("!12!") }, /* [13] = */ { RT_STR_TUPLE("!13!") }, /* [14] = */ { RT_STR_TUPLE("!14!") }, /* [15] = */ { RT_STR_TUPLE("!15!") }, /* [16] = */ { RT_STR_TUPLE("!16!") }, /* [17] = */ { RT_STR_TUPLE("!17!") }, /* [18] = */ { RT_STR_TUPLE("16BIT_PROT_V86") }, /* [19] = */ { RT_STR_TUPLE("32BIT_PROT_V86") }, /* [1a] = */ { RT_STR_TUPLE("!1a!") }, /* [1b] = */ { RT_STR_TUPLE("!1b!") }, /* [1c] = */ { RT_STR_TUPLE("!1c!") }, /* [1d] = */ { RT_STR_TUPLE("!1d!") }, /* [1e] = */ { RT_STR_TUPLE("!1e!") }, /* [1f] = */ { RT_STR_TUPLE("!1f!") }, }; AssertCompile(RT_ELEMENTS(s_aModes) == IEM_F_MODE_MASK + 1); memcpy(pszBuf, s_aModes[fFlags & IEM_F_MODE_MASK].psz, s_aModes[fFlags & IEM_F_MODE_MASK].cch); size_t off = s_aModes[fFlags & IEM_F_MODE_MASK].cch; pszBuf[off++] = ' '; pszBuf[off++] = 'C'; pszBuf[off++] = 'P'; pszBuf[off++] = 'L'; pszBuf[off++] = '0' + ((fFlags >> IEM_F_X86_CPL_SHIFT) & IEM_F_X86_CPL_SMASK); Assert(off < 32); fFlags &= ~(IEM_F_MODE_MASK | IEM_F_X86_CPL_SMASK); static struct { const char *pszName; uint32_t cchName; uint32_t fFlag; } const s_aFlags[] = { { RT_STR_TUPLE("BYPASS_HANDLERS"), IEM_F_BYPASS_HANDLERS }, { RT_STR_TUPLE("PENDING_BRK_INSTR"), IEM_F_PENDING_BRK_INSTR }, { RT_STR_TUPLE("PENDING_BRK_DATA"), IEM_F_PENDING_BRK_DATA }, { RT_STR_TUPLE("PENDING_BRK_X86_IO"), IEM_F_PENDING_BRK_X86_IO }, { RT_STR_TUPLE("X86_DISREGARD_LOCK"), IEM_F_X86_DISREGARD_LOCK }, { RT_STR_TUPLE("X86_CTX_VMX"), IEM_F_X86_CTX_VMX }, { RT_STR_TUPLE("X86_CTX_SVM"), IEM_F_X86_CTX_SVM }, { RT_STR_TUPLE("X86_CTX_IN_GUEST"), IEM_F_X86_CTX_IN_GUEST }, { RT_STR_TUPLE("X86_CTX_SMM"), IEM_F_X86_CTX_SMM }, { RT_STR_TUPLE("INHIBIT_SHADOW"), IEMTB_F_INHIBIT_SHADOW }, { RT_STR_TUPLE("INHIBIT_NMI"), IEMTB_F_INHIBIT_NMI }, { RT_STR_TUPLE("CS_LIM_CHECKS"), IEMTB_F_CS_LIM_CHECKS }, { RT_STR_TUPLE("TYPE_THREADED"), IEMTB_F_TYPE_THREADED }, { RT_STR_TUPLE("TYPE_NATIVE"), IEMTB_F_TYPE_NATIVE }, }; if (fFlags) for (unsigned i = 0; i < RT_ELEMENTS(s_aFlags); i++) if (s_aFlags[i].fFlag & fFlags) { AssertReturnStmt(off + 1 + s_aFlags[i].cchName + 1 <= cbBuf, pszBuf[off] = '\0', pszBuf); pszBuf[off++] = ' '; memcpy(&pszBuf[off], s_aFlags[i].pszName, s_aFlags[i].cchName); off += s_aFlags[i].cchName; fFlags &= ~s_aFlags[i].fFlag; if (!fFlags) break; } pszBuf[off] = '\0'; return pszBuf; } DECLHIDDEN(void) iemNativeDisassembleTb(PCIEMTB pTb, PCDBGFINFOHLP pHlp) RT_NOEXCEPT { AssertReturnVoid((pTb->fFlags & IEMTB_F_TYPE_MASK) == IEMTB_F_TYPE_NATIVE); char szDisBuf[512]; DISSTATE Dis; PCIEMNATIVEINSTR const paNative = pTb->Native.paInstructions; uint32_t const cNative = pTb->Native.cInstructions; uint32_t offNative = 0; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO PCIEMTBDBG const pDbgInfo = pTb->pDbgInfo; #endif DISCPUMODE enmGstCpuMode = (pTb->fFlags & IEM_F_MODE_CPUMODE_MASK) == IEMMODE_16BIT ? DISCPUMODE_16BIT : (pTb->fFlags & IEM_F_MODE_CPUMODE_MASK) == IEMMODE_32BIT ? DISCPUMODE_32BIT : DISCPUMODE_64BIT; #if defined(RT_ARCH_AMD64) && !defined(VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER) DISCPUMODE const enmHstCpuMode = DISCPUMODE_64BIT; #elif defined(RT_ARCH_ARM64) && !defined(VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER) DISCPUMODE const enmHstCpuMode = DISCPUMODE_ARMV8_A64; #elif !defined(VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER) # error "Port me" #else csh hDisasm = ~(size_t)0; # if defined(RT_ARCH_AMD64) cs_err rcCs = cs_open(CS_ARCH_X86, CS_MODE_LITTLE_ENDIAN | CS_MODE_64, &hDisasm); # elif defined(RT_ARCH_ARM64) cs_err rcCs = cs_open(CS_ARCH_ARM64, CS_MODE_LITTLE_ENDIAN, &hDisasm); # else # error "Port me" # endif AssertMsgReturnVoid(rcCs == CS_ERR_OK, ("%d (%#x)\n", rcCs, rcCs)); #endif /* * Print TB info. */ pHlp->pfnPrintf(pHlp, "pTb=%p: GCPhysPc=%RGp cInstructions=%u LB %#x cRanges=%u\n" "pTb=%p: cUsed=%u msLastUsed=%u fFlags=%#010x %s\n", pTb, pTb->GCPhysPc, pTb->cInstructions, pTb->cbOpcodes, pTb->cRanges, pTb, pTb->cUsed, pTb->msLastUsed, pTb->fFlags, iemTbFlagsToString(pTb->fFlags, szDisBuf, sizeof(szDisBuf))); #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO if (pDbgInfo && pDbgInfo->cEntries > 1) { Assert(pDbgInfo->aEntries[0].Gen.uType == kIemTbDbgEntryType_NativeOffset); /* * This disassembly is driven by the debug info which follows the native * code and indicates when it starts with the next guest instructions, * where labels are and such things. */ uint32_t idxThreadedCall = 0; uint32_t fExec = pTb->fFlags & UINT32_C(0x00ffffff); uint8_t idxRange = UINT8_MAX; uint8_t const cRanges = RT_MIN(pTb->cRanges, RT_ELEMENTS(pTb->aRanges)); uint32_t offRange = 0; uint32_t offOpcodes = 0; RTGCPHYS GCPhysPc = pTb->GCPhysPc; uint32_t const cDbgEntries = pDbgInfo->cEntries; uint32_t iDbgEntry = 1; uint32_t offDbgNativeNext = pDbgInfo->aEntries[0].NativeOffset.offNative; while (offNative < cNative) { /* If we're at or have passed the point where the next chunk of debug info starts, process it. */ if (offDbgNativeNext <= offNative) { offDbgNativeNext = UINT32_MAX; for (; iDbgEntry < cDbgEntries; iDbgEntry++) { switch (pDbgInfo->aEntries[iDbgEntry].Gen.uType) { case kIemTbDbgEntryType_GuestInstruction: { /* Did the exec flag change? */ if (fExec != pDbgInfo->aEntries[iDbgEntry].GuestInstruction.fExec) { pHlp->pfnPrintf(pHlp, " fExec change %#08x -> %#08x %s\n", fExec, pDbgInfo->aEntries[iDbgEntry].GuestInstruction.fExec, iemTbFlagsToString(pDbgInfo->aEntries[iDbgEntry].GuestInstruction.fExec, szDisBuf, sizeof(szDisBuf))); fExec = pDbgInfo->aEntries[iDbgEntry].GuestInstruction.fExec; enmGstCpuMode = (fExec & IEM_F_MODE_CPUMODE_MASK) == IEMMODE_16BIT ? DISCPUMODE_16BIT : (fExec & IEM_F_MODE_CPUMODE_MASK) == IEMMODE_32BIT ? DISCPUMODE_32BIT : DISCPUMODE_64BIT; } /* New opcode range? We need to fend up a spurious debug info entry here for cases where the compilation was aborted before the opcode was recorded and the actual instruction was translated to a threaded call. This may happen when we run out of ranges, or when some complicated interrupts/FFs are found to be pending or similar. So, we just deal with it here rather than in the compiler code as it is a lot simpler to do up here. */ if ( idxRange == UINT8_MAX || idxRange >= cRanges || offRange >= pTb->aRanges[idxRange].cbOpcodes) { idxRange += 1; if (idxRange < cRanges) offRange = 0; else continue; Assert(offOpcodes == pTb->aRanges[idxRange].offOpcodes); GCPhysPc = pTb->aRanges[idxRange].offPhysPage + (pTb->aRanges[idxRange].idxPhysPage == 0 ? pTb->GCPhysPc & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK : pTb->aGCPhysPages[pTb->aRanges[idxRange].idxPhysPage - 1]); pHlp->pfnPrintf(pHlp, " Range #%u: GCPhysPc=%RGp LB %#x [idxPg=%d]\n", idxRange, GCPhysPc, pTb->aRanges[idxRange].cbOpcodes, pTb->aRanges[idxRange].idxPhysPage); } /* Disassemble the instruction. */ uint8_t const cbInstrMax = RT_MIN(pTb->aRanges[idxRange].cbOpcodes - offRange, 15); uint32_t cbInstr = 1; int rc = DISInstrWithPrefetchedBytes(GCPhysPc, enmGstCpuMode, DISOPTYPE_ALL, &pTb->pabOpcodes[offOpcodes], cbInstrMax, iemNativeDisasReadBytesDummy, NULL, &Dis, &cbInstr); if (RT_SUCCESS(rc)) { size_t cch = DISFormatYasmEx(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_WIDTH_MAKE(10) | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); static unsigned const s_offMarker = 55; static char const s_szMarker[] = " ; <--- guest"; if (cch < s_offMarker) { memset(&szDisBuf[cch], ' ', s_offMarker - cch); cch = s_offMarker; } if (cch + sizeof(s_szMarker) <= sizeof(szDisBuf)) memcpy(&szDisBuf[cch], s_szMarker, sizeof(s_szMarker)); pHlp->pfnPrintf(pHlp, " %%%%%RGp: %s\n", GCPhysPc, szDisBuf); } else { pHlp->pfnPrintf(pHlp, " %%%%%RGp: %.*Rhxs - guest disassembly failure %Rrc\n", GCPhysPc, cbInstrMax, &pTb->pabOpcodes[offOpcodes], rc); cbInstr = 1; } GCPhysPc += cbInstr; offOpcodes += cbInstr; offRange += cbInstr; continue; } case kIemTbDbgEntryType_ThreadedCall: pHlp->pfnPrintf(pHlp, " Call #%u to %s (%u args)%s\n", idxThreadedCall, g_apszIemThreadedFunctions[pDbgInfo->aEntries[iDbgEntry].ThreadedCall.enmCall], g_acIemThreadedFunctionUsedArgs[pDbgInfo->aEntries[iDbgEntry].ThreadedCall.enmCall], pDbgInfo->aEntries[iDbgEntry].ThreadedCall.fRecompiled ? " - recompiled" : ""); idxThreadedCall++; continue; case kIemTbDbgEntryType_GuestRegShadowing: { PCIEMTBDBGENTRY const pEntry = &pDbgInfo->aEntries[iDbgEntry]; const char * const pszGstReg = g_aGstShadowInfo[pEntry->GuestRegShadowing.idxGstReg].pszName; if (pEntry->GuestRegShadowing.idxHstReg == UINT8_MAX) pHlp->pfnPrintf(pHlp, " Guest register %s != host register %s\n", pszGstReg, g_apszIemNativeHstRegNames[pEntry->GuestRegShadowing.idxHstRegPrev]); else if (pEntry->GuestRegShadowing.idxHstRegPrev == UINT8_MAX) pHlp->pfnPrintf(pHlp, " Guest register %s == host register %s\n", pszGstReg, g_apszIemNativeHstRegNames[pEntry->GuestRegShadowing.idxHstReg]); else pHlp->pfnPrintf(pHlp, " Guest register %s == host register %s (previously in %s)\n", pszGstReg, g_apszIemNativeHstRegNames[pEntry->GuestRegShadowing.idxHstReg], g_apszIemNativeHstRegNames[pEntry->GuestRegShadowing.idxHstRegPrev]); continue; } case kIemTbDbgEntryType_Label: { const char *pszName = "what_the_fudge"; const char *pszComment = ""; bool fNumbered = pDbgInfo->aEntries[iDbgEntry].Label.uData != 0; switch ((IEMNATIVELABELTYPE)pDbgInfo->aEntries[iDbgEntry].Label.enmLabel) { case kIemNativeLabelType_Return: pszName = "Return"; break; case kIemNativeLabelType_ReturnBreak: pszName = "ReturnBreak"; break; case kIemNativeLabelType_ReturnWithFlags: pszName = "ReturnWithFlags"; break; case kIemNativeLabelType_NonZeroRetOrPassUp: pszName = "NonZeroRetOrPassUp"; break; case kIemNativeLabelType_RaiseGp0: pszName = "RaiseGp0"; break; case kIemNativeLabelType_If: pszName = "If"; fNumbered = true; break; case kIemNativeLabelType_Else: pszName = "Else"; fNumbered = true; pszComment = " ; regs state restored pre-if-block"; break; case kIemNativeLabelType_Endif: pszName = "Endif"; fNumbered = true; break; case kIemNativeLabelType_CheckIrq: pszName = "CheckIrq_CheckVM"; fNumbered = true; break; case kIemNativeLabelType_Invalid: case kIemNativeLabelType_End: break; } if (fNumbered) pHlp->pfnPrintf(pHlp, " %s_%u:%s\n", pszName, pDbgInfo->aEntries[iDbgEntry].Label.uData, pszComment); else pHlp->pfnPrintf(pHlp, " %s:\n", pszName); continue; } case kIemTbDbgEntryType_NativeOffset: offDbgNativeNext = pDbgInfo->aEntries[iDbgEntry].NativeOffset.offNative; Assert(offDbgNativeNext > offNative); break; default: AssertFailed(); } iDbgEntry++; break; } } /* * Disassemble the next native instruction. */ PCIEMNATIVEINSTR const pNativeCur = &paNative[offNative]; # ifndef VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER uint32_t cbInstr = sizeof(paNative[0]); int const rc = DISInstr(pNativeCur, enmHstCpuMode, &Dis, &cbInstr); if (RT_SUCCESS(rc)) { # if defined(RT_ARCH_AMD64) if (Dis.pCurInstr->uOpcode == OP_NOP && cbInstr == 7) /* iemNativeEmitMarker */ { uint32_t const uInfo = *(uint32_t const *)&Dis.Instr.ab[3]; if (RT_HIWORD(uInfo) < kIemThreadedFunc_End) pHlp->pfnPrintf(pHlp, " %p: nop ; marker: call #%u to %s (%u args)%s\n", pNativeCur, uInfo & 0x7fff, g_apszIemThreadedFunctions[RT_HIWORD(uInfo)], g_acIemThreadedFunctionUsedArgs[RT_HIWORD(uInfo)], uInfo & 0x8000 ? " - recompiled" : ""); else pHlp->pfnPrintf(pHlp, " %p: nop ; unknown marker: %#x (%d)\n", pNativeCur, uInfo, uInfo); } else # endif { # ifdef RT_ARCH_AMD64 DISFormatYasmEx(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_WIDTH_MAKE(10) | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); # elif defined(RT_ARCH_ARM64) DISFormatArmV8Ex(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); # else # error "Port me" # endif pHlp->pfnPrintf(pHlp, " %p: %s\n", pNativeCur, szDisBuf); } } else { # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs - disassembly failure %Rrc\n", pNativeCur, RT_MIN(cNative - offNative, 16), pNativeCur, rc); # elif defined(RT_ARCH_ARM64) pHlp->pfnPrintf(pHlp, " %p: %#010RX32 - disassembly failure %Rrc\n", pNativeCur, *pNativeCur, rc); # else # error "Port me" # endif cbInstr = sizeof(paNative[0]); } offNative += cbInstr / sizeof(paNative[0]); # else /* VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER */ cs_insn *pInstr; size_t cInstrs = cs_disasm(hDisasm, (const uint8_t *)pNativeCur, (cNative - offNative) * sizeof(*pNativeCur), (uintptr_t)pNativeCur, 1, &pInstr); if (cInstrs > 0) { Assert(cInstrs == 1); # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs %-7s %s\n", pNativeCur, pInstr->size, pNativeCur, pInstr->mnemonic, pInstr->op_str); # else pHlp->pfnPrintf(pHlp, " %p: %#010RX32 %-7s %s\n", pNativeCur, *pNativeCur, pInstr->mnemonic, pInstr->op_str); # endif offNative += pInstr->size / sizeof(*pNativeCur); cs_free(pInstr, cInstrs); } else { # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs - disassembly failure %d\n", pNativeCur, RT_MIN(cNative - offNative, 16), pNativeCur, cs_errno(hDisasm))); # else pHlp->pfnPrintf(pHlp, " %p: %#010RX32 - disassembly failure %d\n", pNativeCur, *pNativeCur, cs_errno(hDisasm)); # endif offNative++; } # endif /* VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER */ } } else #endif /* IEMNATIVE_WITH_TB_DEBUG_INFO */ { /* * No debug info, just disassemble the x86 code and then the native code. * * First the guest code: */ for (unsigned i = 0; i < pTb->cRanges; i++) { RTGCPHYS GCPhysPc = pTb->aRanges[i].offPhysPage + (pTb->aRanges[i].idxPhysPage == 0 ? pTb->GCPhysPc & ~(RTGCPHYS)GUEST_PAGE_OFFSET_MASK : pTb->aGCPhysPages[pTb->aRanges[i].idxPhysPage - 1]); pHlp->pfnPrintf(pHlp, " Range #%u: GCPhysPc=%RGp LB %#x [idxPg=%d]\n", i, GCPhysPc, pTb->aRanges[i].cbOpcodes, pTb->aRanges[i].idxPhysPage); unsigned off = pTb->aRanges[i].offOpcodes; unsigned const cbOpcodes = pTb->aRanges[i].cbOpcodes + off; while (off < cbOpcodes) { uint32_t cbInstr = 1; int rc = DISInstrWithPrefetchedBytes(GCPhysPc, enmGstCpuMode, DISOPTYPE_ALL, &pTb->pabOpcodes[off], cbOpcodes - off, iemNativeDisasReadBytesDummy, NULL, &Dis, &cbInstr); if (RT_SUCCESS(rc)) { DISFormatYasmEx(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_WIDTH_MAKE(10) | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); pHlp->pfnPrintf(pHlp, " %RGp: %s\n", GCPhysPc, szDisBuf); GCPhysPc += cbInstr; off += cbInstr; } else { pHlp->pfnPrintf(pHlp, " %RGp: %.*Rhxs - disassembly failure %Rrc\n", GCPhysPc, cbOpcodes - off, &pTb->pabOpcodes[off], rc); break; } } } /* * Then the native code: */ pHlp->pfnPrintf(pHlp, " Native code %p L %#x\n", paNative, cNative); while (offNative < cNative) { PCIEMNATIVEINSTR const pNativeCur = &paNative[offNative]; # ifndef VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER uint32_t cbInstr = sizeof(paNative[0]); int const rc = DISInstr(pNativeCur, enmHstCpuMode, &Dis, &cbInstr); if (RT_SUCCESS(rc)) { # if defined(RT_ARCH_AMD64) if (Dis.pCurInstr->uOpcode == OP_NOP && cbInstr == 7) /* iemNativeEmitMarker */ { uint32_t const uInfo = *(uint32_t const *)&Dis.Instr.ab[3]; if (RT_HIWORD(uInfo) < kIemThreadedFunc_End) pHlp->pfnPrintf(pHlp, "\n %p: nop ; marker: call #%u to %s (%u args)%s\n", pNativeCur, uInfo & 0x7fff, g_apszIemThreadedFunctions[RT_HIWORD(uInfo)], g_acIemThreadedFunctionUsedArgs[RT_HIWORD(uInfo)], uInfo & 0x8000 ? " - recompiled" : ""); else pHlp->pfnPrintf(pHlp, " %p: nop ; unknown marker: %#x (%d)\n", pNativeCur, uInfo, uInfo); } else # endif { # ifdef RT_ARCH_AMD64 DISFormatYasmEx(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_WIDTH_MAKE(10) | DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); # elif defined(RT_ARCH_ARM64) DISFormatArmV8Ex(&Dis, szDisBuf, sizeof(szDisBuf), DIS_FMT_FLAGS_BYTES_LEFT | DIS_FMT_FLAGS_RELATIVE_BRANCH | DIS_FMT_FLAGS_C_HEX, NULL /*pfnGetSymbol*/, NULL /*pvUser*/); # else # error "Port me" # endif pHlp->pfnPrintf(pHlp, " %p: %s\n", pNativeCur, szDisBuf); } } else { # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs - disassembly failure %Rrc\n", pNativeCur, RT_MIN(cNative - offNative, 16), pNativeCur, rc); # else pHlp->pfnPrintf(pHlp, " %p: %#010RX32 - disassembly failure %Rrc\n", pNativeCur, *pNativeCur, rc); # endif cbInstr = sizeof(paNative[0]); } offNative += cbInstr / sizeof(paNative[0]); # else /* VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER */ cs_insn *pInstr; size_t cInstrs = cs_disasm(hDisasm, (const uint8_t *)pNativeCur, (cNative - offNative) * sizeof(*pNativeCur), (uintptr_t)pNativeCur, 1, &pInstr); if (cInstrs > 0) { Assert(cInstrs == 1); # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs %-7s %s\n", pNativeCur, pInstr->size, pNativeCur, pInstr->mnemonic, pInstr->op_str); # else pHlp->pfnPrintf(pHlp, " %p: %#010RX32 %-7s %s\n", pNativeCur, *pNativeCur, pInstr->mnemonic, pInstr->op_str); # endif offNative += pInstr->size / sizeof(*pNativeCur); cs_free(pInstr, cInstrs); } else { # if defined(RT_ARCH_AMD64) pHlp->pfnPrintf(pHlp, " %p: %.*Rhxs - disassembly failure %d\n", pNativeCur, RT_MIN(cNative - offNative, 16), pNativeCur, cs_errno(hDisasm))); # else pHlp->pfnPrintf(pHlp, " %p: %#010RX32 - disassembly failure %d\n", pNativeCur, *pNativeCur, cs_errno(hDisasm)); # endif offNative++; } # endif /* VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER */ } } #ifdef VBOX_WITH_IEM_USING_CAPSTONE_DISASSEMBLER /* Cleanup. */ cs_close(&hDisasm); #endif } /** * Recompiles the given threaded TB into a native one. * * In case of failure the translation block will be returned as-is. * * @returns pTb. * @param pVCpu The cross context virtual CPU structure of the calling * thread. * @param pTb The threaded translation to recompile to native. */ DECLHIDDEN(PIEMTB) iemNativeRecompile(PVMCPUCC pVCpu, PIEMTB pTb) RT_NOEXCEPT { /* * The first time thru, we allocate the recompiler state, the other times * we just need to reset it before using it again. */ PIEMRECOMPILERSTATE pReNative = pVCpu->iem.s.pNativeRecompilerStateR3; if (RT_LIKELY(pReNative)) iemNativeReInit(pReNative, pTb); else { pReNative = iemNativeInit(pVCpu, pTb); AssertReturn(pReNative, pTb); } /* * Recompiling and emitting code is done using try/throw/catch or setjmp/longjmp * for aborting if an error happens. */ uint32_t cCallsLeft = pTb->Thrd.cCalls; #ifdef LOG_ENABLED uint32_t const cCallsOrg = cCallsLeft; #endif uint32_t off = 0; int rc = VINF_SUCCESS; IEMNATIVE_TRY_SETJMP(pReNative, rc) { /* * Emit prolog code (fixed). */ off = iemNativeEmitProlog(pReNative, off); /* * Convert the calls to native code. */ #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO int32_t iGstInstr = -1; uint32_t fExec = pTb->fFlags; #endif PCIEMTHRDEDCALLENTRY pCallEntry = pTb->Thrd.paCalls; while (cCallsLeft-- > 0) { PFNIEMNATIVERECOMPFUNC const pfnRecom = g_apfnIemNativeRecompileFunctions[pCallEntry->enmFunction]; /* * Debug info and assembly markup. */ #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO if (pCallEntry->enmFunction == kIemThreadedFunc_BltIn_CheckMode) fExec = pCallEntry->auParams[0]; iemNativeDbgInfoAddNativeOffset(pReNative, off); if (iGstInstr < (int32_t)pCallEntry->idxInstr) { if (iGstInstr < (int32_t)pTb->cInstructions) iemNativeDbgInfoAddGuestInstruction(pReNative, fExec); else Assert(iGstInstr == pTb->cInstructions); iGstInstr = pCallEntry->idxInstr; } iemNativeDbgInfoAddThreadedCall(pReNative, (IEMTHREADEDFUNCS)pCallEntry->enmFunction, pfnRecom != NULL); #endif #if defined(VBOX_STRICT) && 1 off = iemNativeEmitMarker(pReNative, off, RT_MAKE_U32((pTb->Thrd.cCalls - cCallsLeft - 1) | (pfnRecom ? 0x8000 : 0), pCallEntry->enmFunction)); #endif /* * Actual work. */ if (pfnRecom) /** @todo stats on this. */ { //STAM_COUNTER_INC() off = pfnRecom(pReNative, off, pCallEntry); } else off = iemNativeEmitThreadedCall(pReNative, off, pCallEntry); Assert(off <= pReNative->cInstrBufAlloc); Assert(pReNative->cCondDepth == 0); /* * Advance. */ pCallEntry++; } /* * Emit the epilog code. */ uint32_t idxReturnLabel; off = iemNativeEmitEpilog(pReNative, off, &idxReturnLabel); /* * Generate special jump labels. */ if (pReNative->bmLabelTypes & RT_BIT_64(kIemNativeLabelType_ReturnBreak)) off = iemNativeEmitReturnBreak(pReNative, off, idxReturnLabel); if (pReNative->bmLabelTypes & RT_BIT_64(kIemNativeLabelType_ReturnWithFlags)) off = iemNativeEmitReturnWithFlags(pReNative, off, idxReturnLabel); if (pReNative->bmLabelTypes & RT_BIT_64(kIemNativeLabelType_RaiseGp0)) off = iemNativeEmitRaiseGp0(pReNative, off, idxReturnLabel); } IEMNATIVE_CATCH_LONGJMP_BEGIN(pReNative, rc); { Log(("iemNativeRecompile: Caught %Rrc while recompiling!\n", rc)); return pTb; } IEMNATIVE_CATCH_LONGJMP_END(pReNative); Assert(off <= pReNative->cInstrBufAlloc); /* * Make sure all labels has been defined. */ PIEMNATIVELABEL const paLabels = pReNative->paLabels; #ifdef VBOX_STRICT uint32_t const cLabels = pReNative->cLabels; for (uint32_t i = 0; i < cLabels; i++) AssertMsgReturn(paLabels[i].off < off, ("i=%d enmType=%d\n", i, paLabels[i].enmType), pTb); #endif /* * Allocate executable memory, copy over the code we've generated. */ PIEMTBALLOCATOR const pTbAllocator = pVCpu->iem.s.pTbAllocatorR3; if (pTbAllocator->pDelayedFreeHead) iemTbAllocatorProcessDelayedFrees(pVCpu, pVCpu->iem.s.pTbAllocatorR3); PIEMNATIVEINSTR const paFinalInstrBuf = (PIEMNATIVEINSTR)iemExecMemAllocatorAlloc(pVCpu, off * sizeof(IEMNATIVEINSTR)); AssertReturn(paFinalInstrBuf, pTb); memcpy(paFinalInstrBuf, pReNative->pInstrBuf, off * sizeof(paFinalInstrBuf[0])); /* * Apply fixups. */ PIEMNATIVEFIXUP const paFixups = pReNative->paFixups; uint32_t const cFixups = pReNative->cFixups; for (uint32_t i = 0; i < cFixups; i++) { Assert(paFixups[i].off < off); Assert(paFixups[i].idxLabel < cLabels); RTPTRUNION const Ptr = { &paFinalInstrBuf[paFixups[i].off] }; switch (paFixups[i].enmType) { #if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) case kIemNativeFixupType_Rel32: Assert(paFixups[i].off + 4 <= off); *Ptr.pi32 = paLabels[paFixups[i].idxLabel].off - paFixups[i].off + paFixups[i].offAddend; continue; #elif defined(RT_ARCH_ARM64) case kIemNativeFixupType_RelImm26At0: { Assert(paFixups[i].off < off); int32_t const offDisp = paLabels[paFixups[i].idxLabel].off - paFixups[i].off + paFixups[i].offAddend; Assert(offDisp >= -262144 && offDisp < 262144); *Ptr.pu32 = (*Ptr.pu32 & UINT32_C(0xfc000000)) | ((uint32_t)offDisp & UINT32_C(0x03ffffff)); continue; } case kIemNativeFixupType_RelImm19At5: { Assert(paFixups[i].off < off); int32_t const offDisp = paLabels[paFixups[i].idxLabel].off - paFixups[i].off + paFixups[i].offAddend; Assert(offDisp >= -262144 && offDisp < 262144); *Ptr.pu32 = (*Ptr.pu32 & UINT32_C(0xff00001f)) | (((uint32_t)offDisp & UINT32_C(0x0007ffff)) << 5); continue; } case kIemNativeFixupType_RelImm14At5: { Assert(paFixups[i].off < off); int32_t const offDisp = paLabels[paFixups[i].idxLabel].off - paFixups[i].off + paFixups[i].offAddend; Assert(offDisp >= -8192 && offDisp < 8192); *Ptr.pu32 = (*Ptr.pu32 & UINT32_C(0xfff8001f)) | (((uint32_t)offDisp & UINT32_C(0x00003fff)) << 5); continue; } #endif case kIemNativeFixupType_Invalid: case kIemNativeFixupType_End: break; } AssertFailed(); } iemExecMemAllocatorReadyForUse(pVCpu, paFinalInstrBuf, off * sizeof(IEMNATIVEINSTR)); /* * Convert the translation block. */ //RT_BREAKPOINT(); RTMemFree(pTb->Thrd.paCalls); pTb->Native.paInstructions = paFinalInstrBuf; pTb->Native.cInstructions = off; pTb->fFlags = (pTb->fFlags & ~IEMTB_F_TYPE_MASK) | IEMTB_F_TYPE_NATIVE; #ifdef IEMNATIVE_WITH_TB_DEBUG_INFO pTb->pDbgInfo = (PIEMTBDBG)RTMemDup(pReNative->pDbgInfo, /* non-fatal, so not return check. */ RT_UOFFSETOF_DYN(IEMTBDBG, aEntries[pReNative->pDbgInfo->cEntries])); #endif Assert(pTbAllocator->cThreadedTbs > 0); pTbAllocator->cThreadedTbs -= 1; pTbAllocator->cNativeTbs += 1; Assert(pTbAllocator->cNativeTbs <= pTbAllocator->cTotalTbs); #ifdef LOG_ENABLED /* * Disassemble to the log if enabled. */ if (LogIs3Enabled()) { Log3(("----------------------------------------- %d calls ---------------------------------------\n", cCallsOrg)); iemNativeDisassembleTb(pTb, DBGFR3InfoLogHlp()); } #endif return pTb; }