| 1 | ; $Id: HMR0Mixed.mac 50428 2014-02-12 15:17:55Z vboxsync $
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| 2 | ;; @file
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| 3 | ; HM - Ring-0 Host 32/64, Guest 32/64 world-switch routines
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| 4 | ;
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| 5 | ; Darwin uses this to build two versions in the hybrid case.
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| 6 | ; Included by HMR0A.asm with RT_ARCH_AMD64 defined or undefined.
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| 7 | ;
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| 8 |
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| 9 | ;
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| 10 | ; Copyright (C) 2006-2013 Oracle Corporation
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| 11 | ;
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| 12 | ; This file is part of VirtualBox Open Source Edition (OSE), as
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| 13 | ; available from http://www.virtualbox.org. This file is free software;
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| 14 | ; you can redistribute it and/or modify it under the terms of the GNU
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| 15 | ; General Public License (GPL) as published by the Free Software
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| 16 | ; Foundation, in version 2 as it comes in the "COPYING" file of the
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| 17 | ; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 18 | ; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 19 | ;
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| 20 |
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| 21 |
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| 22 | ;;
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| 23 | ; Keep these macro definitions in this file as it gets included and compiled
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| 24 | ; with RT_ARCH_AMD64 once and RT_ARCH_X86 once.
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| 25 | %undef VMX_SKIP_GDTR
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| 26 | %undef VMX_SKIP_IDTR
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| 27 | %undef VMX_SKIP_TR
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| 28 |
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| 29 | %ifdef RT_ARCH_AMD64
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| 30 | %define VMX_SKIP_GDTR
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| 31 | %ifdef RT_OS_DARWIN
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| 32 | ; Darwin (Mavericks) uses IDTR limit to store the CPU Id so we need to restore it always.
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| 33 | ; See @bugref{6875}.
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| 34 | %else
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| 35 | %define VMX_SKIP_IDTR
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| 36 | %endif
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| 37 | %define VMX_SKIP_TR
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| 38 | %endif
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| 39 |
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| 40 | ;; @def RESTORE_STATE_VM32
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| 41 | ; Macro restoring essential host state and updating guest state
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| 42 | ; for common host, 32-bit guest for VT-x.
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| 43 | %macro RESTORE_STATE_VM32 0
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| 44 | ; Restore base and limit of the IDTR & GDTR.
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| 45 | %ifndef VMX_SKIP_IDTR
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| 46 | lidt [xSP]
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| 47 | add xSP, xCB * 2
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| 48 | %endif
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| 49 | %ifndef VMX_SKIP_GDTR
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| 50 | lgdt [xSP]
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| 51 | add xSP, xCB * 2
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| 52 | %endif
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| 53 |
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| 54 | push xDI
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| 55 | %ifndef VMX_SKIP_TR
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| 56 | mov xDI, [xSP + xCB * 3] ; pCtx (*3 to skip the saved xDI, TR, LDTR).
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| 57 | %else
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| 58 | mov xDI, [xSP + xCB * 2] ; pCtx (*2 to skip the saved xDI, LDTR).
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| 59 | %endif
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| 60 |
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| 61 | mov [ss:xDI + CPUMCTX.eax], eax
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| 62 | mov [ss:xDI + CPUMCTX.ebx], ebx
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| 63 | mov [ss:xDI + CPUMCTX.ecx], ecx
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| 64 | mov [ss:xDI + CPUMCTX.edx], edx
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| 65 | mov [ss:xDI + CPUMCTX.esi], esi
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| 66 | mov [ss:xDI + CPUMCTX.ebp], ebp
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| 67 | mov xAX, cr2
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| 68 | mov [ss:xDI + CPUMCTX.cr2], xAX
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| 69 |
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| 70 | %ifdef RT_ARCH_AMD64
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| 71 | pop xAX ; The guest edi we pushed above.
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| 72 | mov dword [ss:xDI + CPUMCTX.edi], eax
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| 73 | %else
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| 74 | pop dword [ss:xDI + CPUMCTX.edi] ; The guest edi we pushed above.
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| 75 | %endif
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| 76 |
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| 77 | %ifndef VMX_SKIP_TR
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| 78 | ; Restore TSS selector; must mark it as not busy before using ltr (!)
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| 79 | ; ASSUME that this is supposed to be 'BUSY'. (saves 20-30 ticks on the T42p)
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| 80 | ; @todo get rid of sgdt
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| 81 | pop xBX ; Saved TR
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| 82 | sub xSP, xCB * 2
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| 83 | sgdt [xSP]
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| 84 | mov xAX, xBX
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| 85 | and eax, X86_SEL_MASK_OFF_RPL ; Mask away TI and RPL bits leaving only the descriptor offset.
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| 86 | add xAX, [xSP + 2] ; eax <- GDTR.address + descriptor offset.
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| 87 | and dword [ss:xAX + 4], ~RT_BIT(9) ; Clear the busy flag in TSS desc (bits 0-7=base, bit 9=busy bit).
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| 88 | ltr bx
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| 89 | add xSP, xCB * 2
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| 90 | %endif
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| 91 |
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| 92 | pop xAX ; Saved LDTR
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| 93 | %ifdef RT_ARCH_AMD64
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| 94 | cmp eax, 0
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| 95 | je %%skip_ldt_write32
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| 96 | %endif
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| 97 | lldt ax
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| 98 |
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| 99 | %%skip_ldt_write32:
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| 100 | add xSP, xCB ; pCtx
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| 101 |
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| 102 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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| 103 | pop xDX ; Saved pCache
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| 104 |
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| 105 | ; Note! If we get here as a result of invalid VMCS pointer, all the following
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| 106 | ; vmread's will fail (only eflags.cf=1 will be set) but that shouldn't cause any
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| 107 | ; trouble only just less efficient.
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| 108 | mov ecx, [ss:xDX + VMCSCACHE.Read.cValidEntries]
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| 109 | cmp ecx, 0 ; Can't happen
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| 110 | je %%no_cached_read32
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| 111 | jmp %%cached_read32
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| 112 |
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| 113 | ALIGN(16)
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| 114 | %%cached_read32:
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| 115 | dec xCX
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| 116 | mov eax, [ss:xDX + VMCSCACHE.Read.aField + xCX * 4]
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| 117 | vmread [ss:xDX + VMCSCACHE.Read.aFieldVal + xCX * 8], xAX
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| 118 | cmp xCX, 0
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| 119 | jnz %%cached_read32
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| 120 | %%no_cached_read32:
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| 121 | %endif
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| 122 |
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| 123 | ; Restore segment registers.
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| 124 | MYPOPSEGS xAX, ax
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| 125 |
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| 126 | ; Restore general purpose registers.
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| 127 | MYPOPAD
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| 128 | %endmacro
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| 129 |
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| 130 |
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| 131 | ;/**
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| 132 | ; * Prepares for and executes VMLAUNCH/VMRESUME (32 bits guest mode)
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| 133 | ; *
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| 134 | ; * @returns VBox status code
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| 135 | ; * @param fResume x86:[ebp+8], msc:rcx,gcc:rdi Whether to use vmlauch/vmresume.
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| 136 | ; * @param pCtx x86:[ebp+c], msc:rdx,gcc:rsi Pointer to the guest-CPU context.
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| 137 | ; * @param pCache x86:[esp+10],msc:r8, gcc:rdx Pointer to the VMCS cache.
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| 138 | ; */
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| 139 | ALIGNCODE(16)
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| 140 | BEGINPROC MY_NAME(VMXR0StartVM32)
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| 141 | push xBP
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| 142 | mov xBP, xSP
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| 143 |
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| 144 | pushf
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| 145 | cli
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| 146 |
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| 147 | ; Save all general purpose host registers.
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| 148 | MYPUSHAD
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| 149 |
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| 150 | ; First we have to save some final CPU context registers.
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| 151 | mov eax, VMX_VMCS_HOST_RIP
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| 152 | %ifdef RT_ARCH_AMD64
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| 153 | lea r10, [.vmlaunch_done wrt rip]
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| 154 | vmwrite rax, r10
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| 155 | %else
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| 156 | mov ecx, .vmlaunch_done
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| 157 | vmwrite eax, ecx
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| 158 | %endif
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| 159 | ; Note: assumes success!
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| 160 |
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| 161 | ; Save guest-CPU context pointer.
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| 162 | %ifdef RT_ARCH_AMD64
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| 163 | %ifdef ASM_CALL64_GCC
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| 164 | ; fResume already in rdi
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| 165 | ; pCtx already in rsi
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| 166 | mov rbx, rdx ; pCache
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| 167 | %else
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| 168 | mov rdi, rcx ; fResume
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| 169 | mov rsi, rdx ; pCtx
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| 170 | mov rbx, r8 ; pCache
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| 171 | %endif
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| 172 | %else
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| 173 | mov edi, [ebp + 8] ; fResume
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| 174 | mov esi, [ebp + 12] ; pCtx
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| 175 | mov ebx, [ebp + 16] ; pCache
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| 176 | %endif
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| 177 |
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| 178 | ; Save segment registers.
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| 179 | ; Note: MYPUSHSEGS trashes rdx & rcx, so we moved it here (msvc amd64 case).
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| 180 | MYPUSHSEGS xAX, ax
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| 181 |
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| 182 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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| 183 | mov ecx, [xBX + VMCSCACHE.Write.cValidEntries]
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| 184 | cmp ecx, 0
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| 185 | je .no_cached_writes
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| 186 | mov edx, ecx
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| 187 | mov ecx, 0
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| 188 | jmp .cached_write
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| 189 |
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| 190 | ALIGN(16)
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| 191 | .cached_write:
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| 192 | mov eax, [xBX + VMCSCACHE.Write.aField + xCX * 4]
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| 193 | vmwrite xAX, [xBX + VMCSCACHE.Write.aFieldVal + xCX * 8]
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| 194 | inc xCX
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| 195 | cmp xCX, xDX
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| 196 | jl .cached_write
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| 197 |
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| 198 | mov dword [xBX + VMCSCACHE.Write.cValidEntries], 0
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| 199 | .no_cached_writes:
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| 200 |
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| 201 | ; Save the pCache pointer.
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| 202 | push xBX
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| 203 | %endif
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| 204 |
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| 205 | ; Save the pCtx pointer.
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| 206 | push xSI
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| 207 |
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| 208 | ; Save host LDTR.
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| 209 | xor eax, eax
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| 210 | sldt ax
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| 211 | push xAX
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| 212 |
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| 213 | %ifndef VMX_SKIP_TR
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| 214 | ; The host TR limit is reset to 0x67; save & restore it manually.
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| 215 | str eax
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| 216 | push xAX
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| 217 | %endif
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| 218 |
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| 219 | %ifndef VMX_SKIP_GDTR
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| 220 | ; VT-x only saves the base of the GDTR & IDTR and resets the limit to 0xffff; we must restore the limit correctly!
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| 221 | sub xSP, xCB * 2
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| 222 | sgdt [xSP]
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| 223 | %endif
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| 224 | %ifndef VMX_SKIP_IDTR
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| 225 | sub xSP, xCB * 2
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| 226 | sidt [xSP]
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| 227 | %endif
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| 228 |
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| 229 | ; Load CR2 if necessary (may be expensive as writing CR2 is a synchronizing instruction).
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| 230 | mov xBX, [xSI + CPUMCTX.cr2]
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| 231 | mov xDX, cr2
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| 232 | cmp xBX, xDX
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| 233 | je .skip_cr2_write32
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| 234 | mov cr2, xBX
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| 235 |
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| 236 | .skip_cr2_write32:
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| 237 | mov eax, VMX_VMCS_HOST_RSP
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| 238 | vmwrite xAX, xSP
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| 239 | ; Note: assumes success!
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| 240 | ; Don't mess with ESP anymore!!!
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| 241 |
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| 242 | ; Load guest general purpose registers.
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| 243 | mov eax, [xSI + CPUMCTX.eax]
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| 244 | mov ebx, [xSI + CPUMCTX.ebx]
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| 245 | mov ecx, [xSI + CPUMCTX.ecx]
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| 246 | mov edx, [xSI + CPUMCTX.edx]
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| 247 | mov ebp, [xSI + CPUMCTX.ebp]
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| 248 |
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| 249 | ; Resume or start VM?
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| 250 | cmp xDI, 0 ; fResume
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| 251 | je .vmlaunch_launch
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| 252 |
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| 253 | ; Load guest edi & esi.
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| 254 | mov edi, [xSI + CPUMCTX.edi]
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| 255 | mov esi, [xSI + CPUMCTX.esi]
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| 256 |
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| 257 | vmresume
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| 258 | jmp .vmlaunch_done; ; Here if vmresume detected a failure.
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| 259 |
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| 260 | .vmlaunch_launch:
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| 261 | ; Save guest edi & esi.
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| 262 | mov edi, [xSI + CPUMCTX.edi]
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| 263 | mov esi, [xSI + CPUMCTX.esi]
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| 264 |
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| 265 | vmlaunch
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| 266 | jmp .vmlaunch_done; ; Here if vmlaunch detected a failure.
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| 267 |
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| 268 | ALIGNCODE(16) ;; @todo YASM BUG - this alignment is wrong on darwin, it's 1 byte off.
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| 269 | .vmlaunch_done:
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| 270 | jc near .vmxstart_invalid_vmcs_ptr
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| 271 | jz near .vmxstart_start_failed
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| 272 |
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| 273 | RESTORE_STATE_VM32
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| 274 | mov eax, VINF_SUCCESS
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| 275 |
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| 276 | .vmstart_end:
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| 277 | popf
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| 278 | pop xBP
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| 279 | ret
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| 280 |
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| 281 | .vmxstart_invalid_vmcs_ptr:
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| 282 | RESTORE_STATE_VM32
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| 283 | mov eax, VERR_VMX_INVALID_VMCS_PTR_TO_START_VM
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| 284 | jmp .vmstart_end
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| 285 |
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| 286 | .vmxstart_start_failed:
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| 287 | RESTORE_STATE_VM32
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| 288 | mov eax, VERR_VMX_UNABLE_TO_START_VM
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| 289 | jmp .vmstart_end
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| 290 |
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| 291 | ENDPROC MY_NAME(VMXR0StartVM32)
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| 292 |
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| 293 |
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| 294 | %ifdef RT_ARCH_AMD64
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| 295 | ;; @def RESTORE_STATE_VM64
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| 296 | ; Macro restoring essential host state and updating guest state
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| 297 | ; for 64-bit host, 64-bit guest for VT-x.
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| 298 | ;
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| 299 | %macro RESTORE_STATE_VM64 0
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| 300 | ; Restore base and limit of the IDTR & GDTR
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| 301 | %ifndef VMX_SKIP_IDTR
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| 302 | lidt [xSP]
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| 303 | add xSP, xCB * 2
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| 304 | %endif
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| 305 | %ifndef VMX_SKIP_GDTR
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| 306 | lgdt [xSP]
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| 307 | add xSP, xCB * 2
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| 308 | %endif
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| 309 |
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| 310 | push xDI
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| 311 | %ifndef VMX_SKIP_TR
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| 312 | mov xDI, [xSP + xCB * 3] ; pCtx (*3 to skip the saved xDI, TR, LDTR)
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| 313 | %else
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| 314 | mov xDI, [xSP + xCB * 2] ; pCtx (*2 to skip the saved xDI, LDTR)
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| 315 | %endif
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| 316 |
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| 317 | mov qword [xDI + CPUMCTX.eax], rax
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| 318 | mov qword [xDI + CPUMCTX.ebx], rbx
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| 319 | mov qword [xDI + CPUMCTX.ecx], rcx
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| 320 | mov qword [xDI + CPUMCTX.edx], rdx
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| 321 | mov qword [xDI + CPUMCTX.esi], rsi
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| 322 | mov qword [xDI + CPUMCTX.ebp], rbp
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| 323 | mov qword [xDI + CPUMCTX.r8], r8
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| 324 | mov qword [xDI + CPUMCTX.r9], r9
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| 325 | mov qword [xDI + CPUMCTX.r10], r10
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| 326 | mov qword [xDI + CPUMCTX.r11], r11
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| 327 | mov qword [xDI + CPUMCTX.r12], r12
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| 328 | mov qword [xDI + CPUMCTX.r13], r13
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| 329 | mov qword [xDI + CPUMCTX.r14], r14
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| 330 | mov qword [xDI + CPUMCTX.r15], r15
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| 331 | mov rax, cr2
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| 332 | mov qword [xDI + CPUMCTX.cr2], rax
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| 333 |
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| 334 | pop xAX ; The guest rdi we pushed above
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| 335 | mov qword [xDI + CPUMCTX.edi], rax
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| 336 |
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| 337 | %ifndef VMX_SKIP_TR
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| 338 | ; Restore TSS selector; must mark it as not busy before using ltr (!)
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| 339 | ; ASSUME that this is supposed to be 'BUSY'. (saves 20-30 ticks on the T42p).
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| 340 | ; @todo get rid of sgdt
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| 341 | pop xBX ; Saved TR
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| 342 | sub xSP, xCB * 2
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| 343 | sgdt [xSP]
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| 344 | mov xAX, xBX
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| 345 | and eax, X86_SEL_MASK_OFF_RPL ; Mask away TI and RPL bits leaving only the descriptor offset.
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| 346 | add xAX, [xSP + 2] ; eax <- GDTR.address + descriptor offset.
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| 347 | and dword [xAX + 4], ~RT_BIT(9) ; Clear the busy flag in TSS desc (bits 0-7=base, bit 9=busy bit).
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| 348 | ltr bx
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| 349 | add xSP, xCB * 2
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| 350 | %endif
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| 351 |
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| 352 | pop xAX ; Saved LDTR
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| 353 | cmp eax, 0
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| 354 | je %%skip_ldt_write64
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| 355 | lldt ax
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| 356 |
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| 357 | %%skip_ldt_write64:
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| 358 | pop xSI ; pCtx (needed in rsi by the macros below)
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| 359 |
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| 360 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
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| 361 | pop xDX ; Saved pCache
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| 362 |
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| 363 | ; Note! If we get here as a result of invalid VMCS pointer, all the following
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| 364 | ; vmread's will fail (only eflags.cf=1 will be set) but that shouldn't cause any
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| 365 | ; trouble only just less efficient.
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| 366 | mov ecx, [xDX + VMCSCACHE.Read.cValidEntries]
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| 367 | cmp ecx, 0 ; Can't happen
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| 368 | je %%no_cached_read64
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| 369 | jmp %%cached_read64
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| 370 |
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| 371 | ALIGN(16)
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| 372 | %%cached_read64:
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| 373 | dec xCX
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| 374 | mov eax, [xDX + VMCSCACHE.Read.aField + xCX * 4]
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| 375 | vmread [xDX + VMCSCACHE.Read.aFieldVal + xCX * 8], xAX
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| 376 | cmp xCX, 0
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| 377 | jnz %%cached_read64
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| 378 | %%no_cached_read64:
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| 379 | %endif
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| 380 |
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| 381 | ; Restore segment registers.
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| 382 | MYPOPSEGS xAX, ax
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| 383 |
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| 384 | ; Restore general purpose registers.
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| 385 | MYPOPAD
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| 386 | %endmacro
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| 387 |
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| 388 |
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| 389 | ;/**
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| 390 | ; * Prepares for and executes VMLAUNCH/VMRESUME (64 bits guest mode)
|
|---|
| 391 | ; *
|
|---|
| 392 | ; * @returns VBox status code
|
|---|
| 393 | ; * @param fResume msc:rcx, gcc:rdi Whether to use vmlauch/vmresume.
|
|---|
| 394 | ; * @param pCtx msc:rdx, gcc:rsi Pointer to the guest-CPU context.
|
|---|
| 395 | ; * @param pCache msc:r8, gcc:rdx Pointer to the VMCS cache.
|
|---|
| 396 | ; */
|
|---|
| 397 | ALIGNCODE(16)
|
|---|
| 398 | BEGINPROC MY_NAME(VMXR0StartVM64)
|
|---|
| 399 | push xBP
|
|---|
| 400 | mov xBP, xSP
|
|---|
| 401 |
|
|---|
| 402 | pushf
|
|---|
| 403 | cli
|
|---|
| 404 |
|
|---|
| 405 | ; Save all general purpose host registers.
|
|---|
| 406 | MYPUSHAD
|
|---|
| 407 |
|
|---|
| 408 | ; First we have to save some final CPU context registers.
|
|---|
| 409 | lea r10, [.vmlaunch64_done wrt rip]
|
|---|
| 410 | mov rax, VMX_VMCS_HOST_RIP ; Return address (too difficult to continue after VMLAUNCH?).
|
|---|
| 411 | vmwrite rax, r10
|
|---|
| 412 | ; Note: assumes success!
|
|---|
| 413 |
|
|---|
| 414 | ; Save guest-CPU context pointer.
|
|---|
| 415 | %ifdef ASM_CALL64_GCC
|
|---|
| 416 | ; fResume already in rdi
|
|---|
| 417 | ; pCtx already in rsi
|
|---|
| 418 | mov rbx, rdx ; pCache
|
|---|
| 419 | %else
|
|---|
| 420 | mov rdi, rcx ; fResume
|
|---|
| 421 | mov rsi, rdx ; pCtx
|
|---|
| 422 | mov rbx, r8 ; pCache
|
|---|
| 423 | %endif
|
|---|
| 424 |
|
|---|
| 425 | ; Save segment registers.
|
|---|
| 426 | ; Note: MYPUSHSEGS trashes rdx & rcx, so we moved it here (msvc amd64 case).
|
|---|
| 427 | MYPUSHSEGS xAX, ax
|
|---|
| 428 |
|
|---|
| 429 | %ifdef VMX_USE_CACHED_VMCS_ACCESSES
|
|---|
| 430 | mov ecx, [xBX + VMCSCACHE.Write.cValidEntries]
|
|---|
| 431 | cmp ecx, 0
|
|---|
| 432 | je .no_cached_writes
|
|---|
| 433 | mov edx, ecx
|
|---|
| 434 | mov ecx, 0
|
|---|
| 435 | jmp .cached_write
|
|---|
| 436 |
|
|---|
| 437 | ALIGN(16)
|
|---|
| 438 | .cached_write:
|
|---|
| 439 | mov eax, [xBX + VMCSCACHE.Write.aField + xCX * 4]
|
|---|
| 440 | vmwrite xAX, [xBX + VMCSCACHE.Write.aFieldVal + xCX * 8]
|
|---|
| 441 | inc xCX
|
|---|
| 442 | cmp xCX, xDX
|
|---|
| 443 | jl .cached_write
|
|---|
| 444 |
|
|---|
| 445 | mov dword [xBX + VMCSCACHE.Write.cValidEntries], 0
|
|---|
| 446 | .no_cached_writes:
|
|---|
| 447 |
|
|---|
| 448 | ; Save the pCache pointer.
|
|---|
| 449 | push xBX
|
|---|
| 450 | %endif
|
|---|
| 451 |
|
|---|
| 452 | ; Save the pCtx pointer.
|
|---|
| 453 | push xSI
|
|---|
| 454 |
|
|---|
| 455 | ; Save host LDTR.
|
|---|
| 456 | xor eax, eax
|
|---|
| 457 | sldt ax
|
|---|
| 458 | push xAX
|
|---|
| 459 |
|
|---|
| 460 | %ifndef VMX_SKIP_TR
|
|---|
| 461 | ; The host TR limit is reset to 0x67; save & restore it manually.
|
|---|
| 462 | str eax
|
|---|
| 463 | push xAX
|
|---|
| 464 | %endif
|
|---|
| 465 |
|
|---|
| 466 | %ifndef VMX_SKIP_GDTR
|
|---|
| 467 | ; VT-x only saves the base of the GDTR & IDTR and resets the limit to 0xffff; we must restore the limit correctly!
|
|---|
| 468 | sub xSP, xCB * 2
|
|---|
| 469 | sgdt [xSP]
|
|---|
| 470 | %endif
|
|---|
| 471 | %ifndef VMX_SKIP_IDTR
|
|---|
| 472 | sub xSP, xCB * 2
|
|---|
| 473 | sidt [xSP]
|
|---|
| 474 | %endif
|
|---|
| 475 |
|
|---|
| 476 | ; Load CR2 if necessary (may be expensive as writing CR2 is a synchronizing instruction).
|
|---|
| 477 | mov rbx, qword [xSI + CPUMCTX.cr2]
|
|---|
| 478 | mov rdx, cr2
|
|---|
| 479 | cmp rbx, rdx
|
|---|
| 480 | je .skip_cr2_write
|
|---|
| 481 | mov cr2, rbx
|
|---|
| 482 |
|
|---|
| 483 | .skip_cr2_write:
|
|---|
| 484 | mov eax, VMX_VMCS_HOST_RSP
|
|---|
| 485 | vmwrite xAX, xSP
|
|---|
| 486 | ; Note: assumes success!
|
|---|
| 487 | ; Don't mess with ESP anymore!!!
|
|---|
| 488 |
|
|---|
| 489 | ; Load guest general purpose registers.
|
|---|
| 490 | mov rax, qword [xSI + CPUMCTX.eax]
|
|---|
| 491 | mov rbx, qword [xSI + CPUMCTX.ebx]
|
|---|
| 492 | mov rcx, qword [xSI + CPUMCTX.ecx]
|
|---|
| 493 | mov rdx, qword [xSI + CPUMCTX.edx]
|
|---|
| 494 | mov rbp, qword [xSI + CPUMCTX.ebp]
|
|---|
| 495 | mov r8, qword [xSI + CPUMCTX.r8]
|
|---|
| 496 | mov r9, qword [xSI + CPUMCTX.r9]
|
|---|
| 497 | mov r10, qword [xSI + CPUMCTX.r10]
|
|---|
| 498 | mov r11, qword [xSI + CPUMCTX.r11]
|
|---|
| 499 | mov r12, qword [xSI + CPUMCTX.r12]
|
|---|
| 500 | mov r13, qword [xSI + CPUMCTX.r13]
|
|---|
| 501 | mov r14, qword [xSI + CPUMCTX.r14]
|
|---|
| 502 | mov r15, qword [xSI + CPUMCTX.r15]
|
|---|
| 503 |
|
|---|
| 504 | ; Resume or start VM?
|
|---|
| 505 | cmp xDI, 0 ; fResume
|
|---|
| 506 | je .vmlaunch64_launch
|
|---|
| 507 |
|
|---|
| 508 | ; Load guest rdi & rsi.
|
|---|
| 509 | mov rdi, qword [xSI + CPUMCTX.edi]
|
|---|
| 510 | mov rsi, qword [xSI + CPUMCTX.esi]
|
|---|
| 511 |
|
|---|
| 512 | vmresume
|
|---|
| 513 | jmp .vmlaunch64_done; ; Here if vmresume detected a failure.
|
|---|
| 514 |
|
|---|
| 515 | .vmlaunch64_launch:
|
|---|
| 516 | ; Save guest rdi & rsi.
|
|---|
| 517 | mov rdi, qword [xSI + CPUMCTX.edi]
|
|---|
| 518 | mov rsi, qword [xSI + CPUMCTX.esi]
|
|---|
| 519 |
|
|---|
| 520 | vmlaunch
|
|---|
| 521 | jmp .vmlaunch64_done; ; Here if vmlaunch detected a failure.
|
|---|
| 522 |
|
|---|
| 523 | ALIGNCODE(16)
|
|---|
| 524 | .vmlaunch64_done:
|
|---|
| 525 | jc near .vmxstart64_invalid_vmcs_ptr
|
|---|
| 526 | jz near .vmxstart64_start_failed
|
|---|
| 527 |
|
|---|
| 528 | RESTORE_STATE_VM64
|
|---|
| 529 | mov eax, VINF_SUCCESS
|
|---|
| 530 |
|
|---|
| 531 | .vmstart64_end:
|
|---|
| 532 | popf
|
|---|
| 533 | pop xBP
|
|---|
| 534 | ret
|
|---|
| 535 |
|
|---|
| 536 | .vmxstart64_invalid_vmcs_ptr:
|
|---|
| 537 | RESTORE_STATE_VM64
|
|---|
| 538 | mov eax, VERR_VMX_INVALID_VMCS_PTR_TO_START_VM
|
|---|
| 539 | jmp .vmstart64_end
|
|---|
| 540 |
|
|---|
| 541 | .vmxstart64_start_failed:
|
|---|
| 542 | RESTORE_STATE_VM64
|
|---|
| 543 | mov eax, VERR_VMX_UNABLE_TO_START_VM
|
|---|
| 544 | jmp .vmstart64_end
|
|---|
| 545 | ENDPROC MY_NAME(VMXR0StartVM64)
|
|---|
| 546 | %endif ; RT_ARCH_AMD64
|
|---|
| 547 |
|
|---|
| 548 |
|
|---|
| 549 | ;/**
|
|---|
| 550 | ; * Prepares for and executes VMRUN (32 bits guests)
|
|---|
| 551 | ; *
|
|---|
| 552 | ; * @returns VBox status code
|
|---|
| 553 | ; * @param HCPhysVMCB Physical address of host VMCB.
|
|---|
| 554 | ; * @param HCPhysVMCB Physical address of guest VMCB.
|
|---|
| 555 | ; * @param pCtx Pointer to the guest CPU-context.
|
|---|
| 556 | ; */
|
|---|
| 557 | ALIGNCODE(16)
|
|---|
| 558 | BEGINPROC MY_NAME(SVMR0VMRun)
|
|---|
| 559 | %ifdef RT_ARCH_AMD64 ; fake a cdecl stack frame
|
|---|
| 560 | %ifdef ASM_CALL64_GCC
|
|---|
| 561 | push rdx
|
|---|
| 562 | push rsi
|
|---|
| 563 | push rdi
|
|---|
| 564 | %else
|
|---|
| 565 | push r8
|
|---|
| 566 | push rdx
|
|---|
| 567 | push rcx
|
|---|
| 568 | %endif
|
|---|
| 569 | push 0
|
|---|
| 570 | %endif
|
|---|
| 571 | push xBP
|
|---|
| 572 | mov xBP, xSP
|
|---|
| 573 | pushf
|
|---|
| 574 |
|
|---|
| 575 | ; Save all general purpose host registers.
|
|---|
| 576 | MYPUSHAD
|
|---|
| 577 |
|
|---|
| 578 | ; Save guest CPU-context pointer.
|
|---|
| 579 | mov xSI, [xBP + xCB * 2 + RTHCPHYS_CB * 2] ; pCtx
|
|---|
| 580 | push xSI ; push for saving the state at the end
|
|---|
| 581 |
|
|---|
| 582 | ; Save host fs, gs, sysenter msr etc.
|
|---|
| 583 | mov xAX, [xBP + xCB * 2] ; pVMCBHostPhys (64 bits physical address; x86: take low dword only)
|
|---|
| 584 | push xAX ; save for the vmload after vmrun
|
|---|
| 585 | vmsave
|
|---|
| 586 |
|
|---|
| 587 | ; Setup eax for VMLOAD.
|
|---|
| 588 | mov xAX, [xBP + xCB * 2 + RTHCPHYS_CB] ; pVMCBPhys (64 bits physical address; take low dword only)
|
|---|
| 589 |
|
|---|
| 590 | ; Load guest general purpose registers.
|
|---|
| 591 | ; eax is loaded from the VMCB by VMRUN.
|
|---|
| 592 | mov ebx, [xSI + CPUMCTX.ebx]
|
|---|
| 593 | mov ecx, [xSI + CPUMCTX.ecx]
|
|---|
| 594 | mov edx, [xSI + CPUMCTX.edx]
|
|---|
| 595 | mov edi, [xSI + CPUMCTX.edi]
|
|---|
| 596 | mov ebp, [xSI + CPUMCTX.ebp]
|
|---|
| 597 | mov esi, [xSI + CPUMCTX.esi]
|
|---|
| 598 |
|
|---|
| 599 | ; Clear the global interrupt flag & execute sti to make sure external interrupts cause a world switch.
|
|---|
| 600 | clgi
|
|---|
| 601 | sti
|
|---|
| 602 |
|
|---|
| 603 | ; Load guest fs, gs, sysenter msr etc.
|
|---|
| 604 | vmload
|
|---|
| 605 | ; Run the VM.
|
|---|
| 606 | vmrun
|
|---|
| 607 |
|
|---|
| 608 | ; eax is in the VMCB already; we can use it here.
|
|---|
| 609 |
|
|---|
| 610 | ; Save guest fs, gs, sysenter msr etc.
|
|---|
| 611 | vmsave
|
|---|
| 612 |
|
|---|
| 613 | ; Load host fs, gs, sysenter msr etc.
|
|---|
| 614 | pop xAX ; Pushed above
|
|---|
| 615 | vmload
|
|---|
| 616 |
|
|---|
| 617 | ; Set the global interrupt flag again, but execute cli to make sure IF=0.
|
|---|
| 618 | cli
|
|---|
| 619 | stgi
|
|---|
| 620 |
|
|---|
| 621 | pop xAX ; pCtx
|
|---|
| 622 |
|
|---|
| 623 | mov [ss:xAX + CPUMCTX.ebx], ebx
|
|---|
| 624 | mov [ss:xAX + CPUMCTX.ecx], ecx
|
|---|
| 625 | mov [ss:xAX + CPUMCTX.edx], edx
|
|---|
| 626 | mov [ss:xAX + CPUMCTX.esi], esi
|
|---|
| 627 | mov [ss:xAX + CPUMCTX.edi], edi
|
|---|
| 628 | mov [ss:xAX + CPUMCTX.ebp], ebp
|
|---|
| 629 |
|
|---|
| 630 | ; Restore host general purpose registers.
|
|---|
| 631 | MYPOPAD
|
|---|
| 632 |
|
|---|
| 633 | mov eax, VINF_SUCCESS
|
|---|
| 634 |
|
|---|
| 635 | popf
|
|---|
| 636 | pop xBP
|
|---|
| 637 | %ifdef RT_ARCH_AMD64
|
|---|
| 638 | add xSP, 4*xCB
|
|---|
| 639 | %endif
|
|---|
| 640 | ret
|
|---|
| 641 | ENDPROC MY_NAME(SVMR0VMRun)
|
|---|
| 642 |
|
|---|
| 643 | %ifdef RT_ARCH_AMD64
|
|---|
| 644 | ;/**
|
|---|
| 645 | ; * Prepares for and executes VMRUN (64 bits guests)
|
|---|
| 646 | ; *
|
|---|
| 647 | ; * @returns VBox status code
|
|---|
| 648 | ; * @param HCPhysVMCB Physical address of host VMCB.
|
|---|
| 649 | ; * @param HCPhysVMCB Physical address of guest VMCB.
|
|---|
| 650 | ; * @param pCtx Pointer to the guest-CPU context.
|
|---|
| 651 | ; */
|
|---|
| 652 | ALIGNCODE(16)
|
|---|
| 653 | BEGINPROC MY_NAME(SVMR0VMRun64)
|
|---|
| 654 | ; Fake a cdecl stack frame
|
|---|
| 655 | %ifdef ASM_CALL64_GCC
|
|---|
| 656 | push rdx
|
|---|
| 657 | push rsi
|
|---|
| 658 | push rdi
|
|---|
| 659 | %else
|
|---|
| 660 | push r8
|
|---|
| 661 | push rdx
|
|---|
| 662 | push rcx
|
|---|
| 663 | %endif
|
|---|
| 664 | push 0
|
|---|
| 665 | push rbp
|
|---|
| 666 | mov rbp, rsp
|
|---|
| 667 | pushf
|
|---|
| 668 |
|
|---|
| 669 | ; Manual save and restore:
|
|---|
| 670 | ; - General purpose registers except RIP, RSP, RAX
|
|---|
| 671 | ;
|
|---|
| 672 | ; Trashed:
|
|---|
| 673 | ; - CR2 (we don't care)
|
|---|
| 674 | ; - LDTR (reset to 0)
|
|---|
| 675 | ; - DRx (presumably not changed at all)
|
|---|
| 676 | ; - DR7 (reset to 0x400)
|
|---|
| 677 | ;
|
|---|
| 678 |
|
|---|
| 679 | ; Save all general purpose host registers.
|
|---|
| 680 | MYPUSHAD
|
|---|
| 681 |
|
|---|
| 682 | ; Save guest CPU-context pointer.
|
|---|
| 683 | mov rsi, [rbp + xCB * 2 + RTHCPHYS_CB * 2] ; pCtx
|
|---|
| 684 | push rsi ; push for saving the state at the end
|
|---|
| 685 |
|
|---|
| 686 | ; Save host fs, gs, sysenter msr etc.
|
|---|
| 687 | mov rax, [rbp + xCB * 2] ; pVMCBHostPhys (64 bits physical address; x86: take low dword only)
|
|---|
| 688 | push rax ; Save for the vmload after vmrun
|
|---|
| 689 | vmsave
|
|---|
| 690 |
|
|---|
| 691 | ; Setup eax for VMLOAD.
|
|---|
| 692 | mov rax, [rbp + xCB * 2 + RTHCPHYS_CB] ; pVMCBPhys (64 bits physical address; take low dword only)
|
|---|
| 693 |
|
|---|
| 694 | ; Load guest general purpose registers.
|
|---|
| 695 | ; rax is loaded from the VMCB by VMRUN.
|
|---|
| 696 | mov rbx, qword [xSI + CPUMCTX.ebx]
|
|---|
| 697 | mov rcx, qword [xSI + CPUMCTX.ecx]
|
|---|
| 698 | mov rdx, qword [xSI + CPUMCTX.edx]
|
|---|
| 699 | mov rdi, qword [xSI + CPUMCTX.edi]
|
|---|
| 700 | mov rbp, qword [xSI + CPUMCTX.ebp]
|
|---|
| 701 | mov r8, qword [xSI + CPUMCTX.r8]
|
|---|
| 702 | mov r9, qword [xSI + CPUMCTX.r9]
|
|---|
| 703 | mov r10, qword [xSI + CPUMCTX.r10]
|
|---|
| 704 | mov r11, qword [xSI + CPUMCTX.r11]
|
|---|
| 705 | mov r12, qword [xSI + CPUMCTX.r12]
|
|---|
| 706 | mov r13, qword [xSI + CPUMCTX.r13]
|
|---|
| 707 | mov r14, qword [xSI + CPUMCTX.r14]
|
|---|
| 708 | mov r15, qword [xSI + CPUMCTX.r15]
|
|---|
| 709 | mov rsi, qword [xSI + CPUMCTX.esi]
|
|---|
| 710 |
|
|---|
| 711 | ; Clear the global interrupt flag & execute sti to make sure external interrupts cause a world switch.
|
|---|
| 712 | clgi
|
|---|
| 713 | sti
|
|---|
| 714 |
|
|---|
| 715 | ; Load guest fs, gs, sysenter msr etc.
|
|---|
| 716 | vmload
|
|---|
| 717 | ; Run the VM.
|
|---|
| 718 | vmrun
|
|---|
| 719 |
|
|---|
| 720 | ; rax is in the VMCB already; we can use it here.
|
|---|
| 721 |
|
|---|
| 722 | ; Save guest fs, gs, sysenter msr etc.
|
|---|
| 723 | vmsave
|
|---|
| 724 |
|
|---|
| 725 | ; Load host fs, gs, sysenter msr etc.
|
|---|
| 726 | pop rax ; pushed above
|
|---|
| 727 | vmload
|
|---|
| 728 |
|
|---|
| 729 | ; Set the global interrupt flag again, but execute cli to make sure IF=0.
|
|---|
| 730 | cli
|
|---|
| 731 | stgi
|
|---|
| 732 |
|
|---|
| 733 | pop rax ; pCtx
|
|---|
| 734 |
|
|---|
| 735 | mov qword [rax + CPUMCTX.ebx], rbx
|
|---|
| 736 | mov qword [rax + CPUMCTX.ecx], rcx
|
|---|
| 737 | mov qword [rax + CPUMCTX.edx], rdx
|
|---|
| 738 | mov qword [rax + CPUMCTX.esi], rsi
|
|---|
| 739 | mov qword [rax + CPUMCTX.edi], rdi
|
|---|
| 740 | mov qword [rax + CPUMCTX.ebp], rbp
|
|---|
| 741 | mov qword [rax + CPUMCTX.r8], r8
|
|---|
| 742 | mov qword [rax + CPUMCTX.r9], r9
|
|---|
| 743 | mov qword [rax + CPUMCTX.r10], r10
|
|---|
| 744 | mov qword [rax + CPUMCTX.r11], r11
|
|---|
| 745 | mov qword [rax + CPUMCTX.r12], r12
|
|---|
| 746 | mov qword [rax + CPUMCTX.r13], r13
|
|---|
| 747 | mov qword [rax + CPUMCTX.r14], r14
|
|---|
| 748 | mov qword [rax + CPUMCTX.r15], r15
|
|---|
| 749 |
|
|---|
| 750 | ; Restore host general purpose registers.
|
|---|
| 751 | MYPOPAD
|
|---|
| 752 |
|
|---|
| 753 | mov eax, VINF_SUCCESS
|
|---|
| 754 |
|
|---|
| 755 | popf
|
|---|
| 756 | pop rbp
|
|---|
| 757 | add rsp, 4 * xCB
|
|---|
| 758 | ret
|
|---|
| 759 | ENDPROC MY_NAME(SVMR0VMRun64)
|
|---|
| 760 | %endif ; RT_ARCH_AMD64
|
|---|
| 761 |
|
|---|
