| 1 | ; $Id: IEMAllN8veHlpA.asm 105571 2024-08-01 18:22:45Z vboxsync $
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| 2 | ;; @file
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| 3 | ; IEM - Native Recompiler Assembly Helpers.
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2023 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 | ;* Header Files *
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| 30 | ;*********************************************************************************************************************************
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| 31 | %define RT_ASM_WITH_SEH64_ALT ; yasm gets confused by alignment, so we cannot use RT_ASM_WITH_SEH64. sigh.
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| 32 | %include "VBox/asmdefs.mac"
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| 33 |
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| 34 | %include "IEMInternal.mac"
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| 35 | %include "IEMN8veRecompiler.mac"
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| 36 |
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| 37 |
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| 38 | ;*********************************************************************************************************************************
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| 39 | ;* External Symbols *
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| 40 | ;*********************************************************************************************************************************
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| 41 | BEGINCODE
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| 42 | extern NAME(iemThreadedFunc_BltIn_LogCpuStateWorker)
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| 43 | extern NAME(iemNativeHlpCheckTlbLookup)
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| 44 |
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| 45 |
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| 46 | BEGINCODE
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| 47 | ;;
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| 48 | ; This is the common prologue of a TB, saving all volatile registers
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| 49 | ; and creating the stack frame for saving temporary values.
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| 50 | ;
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| 51 | ; @param pVCpu (gcc:rdi, msc:rcx) The cross-context vCPU structure pointer.
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| 52 | ; @param pfnTbStart (gcc:rsi, msc:rdx) The TB instruction start pointer.
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| 53 | ;
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| 54 | ; @note This must match the epilogue code generated by iemNativeEmitEpilog()!
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| 55 | ;
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| 56 | ; Any changes here must also be reflected in the unwind code installed by
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| 57 | ; iemExecMemAllocatorInitAndRegisterUnwindInfoForChunk()!
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| 58 | ;
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| 59 | ALIGNCODE(64) ; Make sure the whole prolog is within a single cache line.
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| 60 | BEGINPROC iemNativeTbEntry
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| 61 | push rbp
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| 62 | SEH64_PUSH_xBP
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| 63 | mov rbp, rsp
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| 64 | SEH64_SET_FRAME_xBP 0
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| 65 | push rbx
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| 66 | SEH64_PUSH_GREG rbp
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| 67 | %ifdef ASM_CALL64_MSC
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| 68 | mov IEMNATIVE_REG_FIXED_PVMCPU_ASM, rcx ; ASSUMES IEMNATIVE_REG_FIXED_PVMCPU_ASM is rbx
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| 69 | push rsi
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| 70 | SEH64_PUSH_GREG rsi
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| 71 | push rdi
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| 72 | SEH64_PUSH_GREG rdi
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| 73 | %else
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| 74 | mov IEMNATIVE_REG_FIXED_PVMCPU_ASM, rdi ; ASSUMES IEMNATIVE_REG_FIXED_PVMCPU_ASM is rbx
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| 75 | %endif
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| 76 | push r12
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| 77 | SEH64_PUSH_GREG r12
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| 78 | push r13
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| 79 | SEH64_PUSH_GREG r13
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| 80 | push r14
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| 81 | SEH64_PUSH_GREG r14
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| 82 | push r15
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| 83 | SEH64_PUSH_GREG r15
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| 84 | %ifdef VBOX_WITH_IEM_NATIVE_RECOMPILER_LONGJMP
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| 85 | %error "Port me - need to store RBP in IEMCPU::pvTbFramePointerR3; Create ASM version of IEMCPU in IEMInternalStruct.mac"
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| 86 | %endif
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| 87 | %define MY_STACK_ALLOC ( IEMNATIVE_FRAME_ALIGN_SIZE \
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| 88 | + IEMNATIVE_FRAME_VAR_SIZE \
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| 89 | + IEMNATIVE_FRAME_STACK_ARG_COUNT * 8 \
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| 90 | + IEMNATIVE_FRAME_SHADOW_ARG_COUNT * 8)
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| 91 | sub rsp, MY_STACK_ALLOC
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| 92 | SEH64_ALLOCATE_STACK MY_STACK_ALLOC
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| 93 |
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| 94 | SEH64_END_PROLOGUE
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| 95 |
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| 96 | ; Jump to the TB code.
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| 97 | %ifdef ASM_CALL64_MSC
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| 98 | jmp rdx
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| 99 | %else
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| 100 | jmp rsi
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| 101 | %endif
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| 102 | ENDPROC iemNativeTbEntry
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| 103 |
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| 104 |
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| 105 | ;;
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| 106 | ; This does the epilogue of a TB, given the RBP for the frame and eax value to return.
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| 107 | ;
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| 108 | ; @param pFrame (gcc:rdi, msc:rcx) The frame pointer.
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| 109 | ; @param rc (gcc:esi, msc:edx) The return value.
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| 110 | ;
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| 111 | ; @note This doesn't really work for MSC since xmm6 thru xmm15 are non-volatile
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| 112 | ; and since we don't save them in the TB prolog we'll potentially return
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| 113 | ; with different values if any functions on the calling stack uses them
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| 114 | ; as they're unlikely to restore them till they return.
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| 115 | ;
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| 116 | ; For the GCC calling convention all xmm registers are volatile and the
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| 117 | ; only worry would be someone fiddling the control bits of MXCSR or FCW
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| 118 | ; without restoring them. This is highly unlikely, unless we're doing
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| 119 | ; it ourselves, I think.
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| 120 | ;
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| 121 | ALIGNCODE(16)
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| 122 | BEGINPROC iemNativeTbLongJmp
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| 123 | %ifdef ASM_CALL64_MSC
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| 124 | mov rbp, rcx
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| 125 | mov eax, edx
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| 126 | %else
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| 127 | mov rbp, rdi
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| 128 | mov eax, esi
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| 129 | %endif
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| 130 | SEH64_PUSH_xBP ; non-sense, but whatever.
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| 131 | SEH64_END_PROLOGUE
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| 132 |
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| 133 | ;
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| 134 | ; This must exactly match what iemNativeEmitEpilog does.
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| 135 | ;
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| 136 | %ifdef ASM_CALL64_MSC
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| 137 | lea rsp, [rbp - 5 * 8]
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| 138 | %else
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| 139 | lea rsp, [rbp - 7 * 8]
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| 140 | %endif
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| 141 | pop r15
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| 142 | pop r14
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| 143 | pop r13
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| 144 | pop r12
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| 145 | %ifdef ASM_CALL64_MSC
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| 146 | pop rdi
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| 147 | pop rsi
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| 148 | %endif
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| 149 | pop rbx
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| 150 | leave
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| 151 | ret
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| 152 | ENDPROC iemNativeTbLongJmp
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| 153 |
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| 154 |
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| 155 |
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| 156 | ;;
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| 157 | ; This is wrapper function that saves and restores all volatile registers
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| 158 | ; so the impact of inserting LogCpuState is minimal to the other TB code.
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| 159 | ;
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| 160 | ALIGNCODE(64)
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| 161 | BEGINPROC iemNativeHlpAsmSafeWrapLogCpuState
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| 162 | push xBP
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| 163 | SEH64_PUSH_xBP
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| 164 | mov xBP, xSP
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| 165 | SEH64_SET_FRAME_xBP 0
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| 166 | SEH64_END_PROLOGUE
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| 167 |
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| 168 | ;
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| 169 | ; Save all volatile registers.
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| 170 | ;
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| 171 | push xAX
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| 172 | push xCX
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| 173 | push xDX
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| 174 | %ifdef RT_OS_WINDOWS
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| 175 | push xSI
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| 176 | push xDI
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| 177 | %endif
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| 178 | push r8
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| 179 | push r9
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| 180 | push r10
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| 181 | push r11
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| 182 | sub rsp, 8+20h
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| 183 |
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| 184 | ;
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| 185 | ; Call C function to do the actual work.
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| 186 | ;
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| 187 | %ifdef RT_OS_WINDOWS
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| 188 | mov rcx, rbx ; IEMNATIVE_REG_FIXED_PVMCPU
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| 189 | mov rdx, [rbp + 10h] ; Just in case we decide to put something there.
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| 190 | xor r8, r8
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| 191 | xor r9, r9
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| 192 | %else
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| 193 | mov rdi, rbx ; IEMNATIVE_REG_FIXED_PVMCPU
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| 194 | mov rsi, [rbp + 10h] ; Just in case we decide to put something there.
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| 195 | xor ecx, ecx
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| 196 | xor edx, edx
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| 197 | %endif
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| 198 | call NAME(iemThreadedFunc_BltIn_LogCpuStateWorker)
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| 199 |
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| 200 | ;
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| 201 | ; Restore volatile registers and return to the TB code.
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| 202 | ;
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| 203 | add rsp, 8+20h
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| 204 | pop r11
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| 205 | pop r10
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| 206 | pop r9
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| 207 | pop r8
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| 208 | %ifdef RT_OS_WINDOWS
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| 209 | pop xDI
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| 210 | pop xSI
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| 211 | %endif
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| 212 | pop xDX
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| 213 | pop xCX
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| 214 | pop xAX
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| 215 | leave
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| 216 | ret
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| 217 | ENDPROC iemNativeHlpAsmSafeWrapLogCpuState
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| 218 |
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| 219 |
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| 220 | ;;
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| 221 | ; This is wrapper function that saves and restores all volatile registers
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| 222 | ; so the impact of inserting CheckTlbLookup is minimal to the other TB code.
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| 223 | ;
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| 224 | ALIGNCODE(16)
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| 225 | BEGINPROC iemNativeHlpAsmSafeWrapCheckTlbLookup
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| 226 | push xBP
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| 227 | SEH64_PUSH_xBP
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| 228 | mov xBP, xSP
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| 229 | SEH64_SET_FRAME_xBP 0
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| 230 | SEH64_END_PROLOGUE
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| 231 |
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| 232 | ;
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| 233 | ; Save all volatile registers.
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| 234 | ;
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| 235 | push xAX
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| 236 | push xCX
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| 237 | push xDX
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| 238 | %ifdef RT_OS_WINDOWS
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| 239 | push xSI
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| 240 | push xDI
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| 241 | %endif
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| 242 | push r8
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| 243 | push r9
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| 244 | push r10
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| 245 | push r11
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| 246 | sub rsp, 8+20h
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| 247 |
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| 248 | ;
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| 249 | ; Call C function to do the actual work.
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| 250 | ;
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| 251 | %ifdef RT_OS_WINDOWS
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| 252 | mov rcx, [rbp + 10h]
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| 253 | mov rdx, [rbp + 18h]
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| 254 | mov r8, [rbp + 20h]
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| 255 | mov r9, [rbp + 28h]
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| 256 | %else
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| 257 | mov rdi, [rbp + 10h]
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| 258 | mov rsi, [rbp + 18h]
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| 259 | mov rcx, [rbp + 20h]
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| 260 | mov rdx, [rbp + 28h]
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| 261 | %endif
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| 262 | call NAME(iemNativeHlpCheckTlbLookup)
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| 263 |
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| 264 | ;
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| 265 | ; Restore volatile registers and return to the TB code.
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| 266 | ;
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| 267 | add rsp, 8+20h
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| 268 | pop r11
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| 269 | pop r10
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| 270 | pop r9
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| 271 | pop r8
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| 272 | %ifdef RT_OS_WINDOWS
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| 273 | pop xDI
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| 274 | pop xSI
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| 275 | %endif
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| 276 | pop xDX
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| 277 | pop xCX
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| 278 | pop xAX
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| 279 | leave
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| 280 | ret 20h
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| 281 | ENDPROC iemNativeHlpAsmSafeWrapCheckTlbLookup
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| 282 |
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| 283 |
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| 284 | ;;
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| 285 | ; This is wrapper function that restores MXCSR when TB execution finished.
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| 286 | ;
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| 287 | ; @param uRegFpCtrl (gcc:rdi, msc:rcx) The MXCSR value to restore.
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| 288 | ;
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| 289 | ; @todo r=bird: could use the _mm_setcsr() intrinsic instead...
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| 290 | ;
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| 291 | ALIGNCODE(16)
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| 292 | BEGINPROC iemNativeFpCtrlRegRestore
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| 293 | SEH64_END_PROLOGUE
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| 294 |
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| 295 | %ifdef RT_OS_WINDOWS
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| 296 | mov [xSP + xCB], edi ; use the first parameter spill slot.
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| 297 | ldmxcsr [xSP + xCB]
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| 298 | %else
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| 299 | push xDI
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| 300 | ldmxcsr [xSP]
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| 301 | add xSP, xCB
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| 302 | %endif
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| 303 |
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| 304 | ret
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| 305 | ENDPROC iemNativeFpCtrlRegRestore
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