| 1 | /* $Id: IEMAllN8veHlpA-arm64.S 104230 2024-04-08 13:45:54Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IEM - Native Recompiler Assembly Helpers, ARM64 variant.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2024 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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| 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #include <iprt/asmdefs-arm.h>
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| 33 |
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| 34 |
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| 35 | BEGINCODE
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| 36 |
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| 37 | .extern NAME(iemThreadedFunc_BltIn_LogCpuStateWorker)
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| 38 |
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| 39 | /**
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| 40 | * This does the epilogue of a TB, given the RBP for the frame and eax value to return.
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| 41 | *
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| 42 | * @param pFrame (x0) The frame pointer.
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| 43 | * @param rc (w1) The return value.
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| 44 | *
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| 45 | * @note This doesn't really work for MSC since xmm6 thru xmm15 are non-volatile
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| 46 | * and since we don't save them in the TB prolog we'll potentially return
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| 47 | * with different values if any functions on the calling stack uses them
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| 48 | * as they're unlikely to restore them till they return.
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| 49 | *
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| 50 | * For the GCC calling convention all xmm registers are volatile and the
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| 51 | * only worry would be someone fiddling the control bits of MXCSR or FCW
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| 52 | * without restoring them. This is highly unlikely, unless we're doing
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| 53 | * it ourselves, I think.
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| 54 | */
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| 55 | BEGINPROC_HIDDEN iemNativeTbLongJmp
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| 56 | /*
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| 57 | * This must exactly match what iemNativeEmitEpilog does.
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| 58 | */
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| 59 | sub sp, x0, #0x50
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| 60 | ldp x19, x20, [sp, #0x00]
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| 61 | ldp x21, x22, [sp, #0x10]
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| 62 | ldp x23, x24, [sp, #0x20]
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| 63 | ldp x25, x26, [sp, #0x30]
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| 64 | ldp x27, x28, [sp, #0x40]
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| 65 | ldp x29, x30, [sp, #0x50] /* the pFrame address points to this entry */
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| 66 | add sp, sp, #0x60
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| 67 | mov w0, w1 /* The return value */
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| 68 | #ifdef RT_OS_DARWIN
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| 69 | retab
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| 70 | #else
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| 71 | ret
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| 72 | #endif
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| 73 | brk #1
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| 74 |
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| 75 |
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| 76 |
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| 77 | #define IEMNATIVE_HLP_FRAME_SIZE (11 * 16)
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| 78 |
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| 79 | /**
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| 80 | * This is wrapper function that saves and restores all volatile registers
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| 81 | * so the impact of inserting LogCpuState is minimal to the other TB code.
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| 82 | */
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| 83 | BEGINPROC_HIDDEN iemNativeHlpAsmSafeWrapLogCpuState
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| 84 | #ifdef RT_OS_DARWIN
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| 85 | pacibsp
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| 86 | #endif
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| 87 |
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| 88 | /*
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| 89 | * Save all volatile registers.
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| 90 | */
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| 91 | stp x29, x30, [sp, #-IEMNATIVE_HLP_FRAME_SIZE]!
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| 92 | stp x0, x1, [sp, #( 1 * 16)]
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| 93 | stp x2, x3, [sp, #( 2 * 16)]
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| 94 | stp x4, x5, [sp, #( 3 * 16)]
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| 95 | stp x5, x6, [sp, #( 4 * 16)]
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| 96 | stp x7, x8, [sp, #( 5 * 16)]
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| 97 | stp x9, x10, [sp, #( 6 * 16)]
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| 98 | stp x11, x12, [sp, #( 7 * 16)]
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| 99 | stp x13, x14, [sp, #( 8 * 16)]
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| 100 | stp x15, x16, [sp, #( 9 * 16)]
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| 101 | stp x17, x18, [sp, #(10 * 16)]
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| 102 |
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| 103 | /*
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| 104 | * Move the pVCpu pointer from the fixed register to the first argument.
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| 105 | * @todo This needs syncing with what we use in IEMN8veRecompiler.h
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| 106 | * but we can't include that header right now, would need some #ifndef IN_ASM_CODE...
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| 107 | * in the header or splitting up the header into a asm safe one and a one included from C/C++.
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| 108 | */
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| 109 | mov x0, x28
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| 110 |
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| 111 | /*
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| 112 | * Call C function to do the actual work.
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| 113 | */
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| 114 | bl NAME(iemThreadedFunc_BltIn_LogCpuStateWorker)
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| 115 |
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| 116 | /*
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| 117 | * Restore volatile registers and return to the TB code.
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| 118 | */
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| 119 | ldp x29, x30, [sp, #( 0 * 16)]
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| 120 | ldp x0, x1, [sp, #( 1 * 16)]
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| 121 | ldp x2, x3, [sp, #( 2 * 16)]
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| 122 | ldp x4, x5, [sp, #( 3 * 16)]
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| 123 | ldp x5, x6, [sp, #( 4 * 16)]
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| 124 | ldp x7, x8, [sp, #( 5 * 16)]
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| 125 | ldp x9, x10, [sp, #( 6 * 16)]
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| 126 | ldp x11, x12, [sp, #( 7 * 16)]
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| 127 | ldp x13, x14, [sp, #( 8 * 16)]
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| 128 | ldp x15, x16, [sp, #( 9 * 16)]
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| 129 | ldp x17, x18, [sp, #(10 * 16)]
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| 130 | add sp, sp, #IEMNATIVE_HLP_FRAME_SIZE
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| 131 |
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| 132 | #ifdef RT_OS_DARWIN
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| 133 | retab
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| 134 | #else
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| 135 | ret
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| 136 | #endif
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| 137 | brk #1
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