x64: Proper stack alignment in shader JIT function calls
Import Dolphin stack handling and register saving routines Also removes the x86 parts from abi files
This commit is contained in:
aroulin
parent
0b6c0afeb7
commit
179ad35c2e
5 changed files with 111 additions and 455 deletions
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@ -22,247 +22,69 @@ using namespace Gen;
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// Shared code between Win64 and Unix64
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// Sets up a __cdecl function.
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void XEmitter::ABI_EmitPrologue(int maxCallParams)
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{
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#ifdef _M_IX86
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// Don't really need to do anything
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#elif defined(ARCHITECTURE_x86_64)
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#if _WIN32
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int stacksize = ((maxCallParams + 1) & ~1) * 8 + 8;
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// Set up a stack frame so that we can call functions
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// TODO: use maxCallParams
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SUB(64, R(RSP), Imm8(stacksize));
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#endif
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#else
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#error Arch not supported
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void XEmitter::ABI_CalculateFrameSize(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size, size_t* shadowp, size_t* subtractionp, size_t* xmm_offsetp) {
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size_t shadow = 0;
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#if defined(_WIN32)
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shadow = 0x20;
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#endif
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int count = (mask & ABI_ALL_GPRS).Count();
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rsp_alignment -= count * 8;
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size_t subtraction = 0;
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int fpr_count = (mask & ABI_ALL_FPRS).Count();
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if (fpr_count) {
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// If we have any XMMs to save, we must align the stack here.
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subtraction = rsp_alignment & 0xf;
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}
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subtraction += 16 * fpr_count;
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size_t xmm_base_subtraction = subtraction;
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subtraction += needed_frame_size;
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subtraction += shadow;
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// Final alignment.
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rsp_alignment -= subtraction;
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subtraction += rsp_alignment & 0xf;
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*shadowp = shadow;
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*subtractionp = subtraction;
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*xmm_offsetp = subtraction - xmm_base_subtraction;
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}
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void XEmitter::ABI_EmitEpilogue(int maxCallParams)
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{
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#ifdef _M_IX86
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RET();
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#elif defined(ARCHITECTURE_x86_64)
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#ifdef _WIN32
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int stacksize = ((maxCallParams+1)&~1)*8 + 8;
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ADD(64, R(RSP), Imm8(stacksize));
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#endif
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RET();
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#else
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#error Arch not supported
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size_t XEmitter::ABI_PushRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size) {
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size_t shadow, subtraction, xmm_offset;
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ABI_CalculateFrameSize(mask, rsp_alignment, needed_frame_size, &shadow, &subtraction, &xmm_offset);
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for (int r : mask & ABI_ALL_GPRS)
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PUSH((X64Reg)r);
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#endif
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if (subtraction)
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SUB(64, R(RSP), subtraction >= 0x80 ? Imm32((u32)subtraction) : Imm8((u8)subtraction));
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for (int x : mask & ABI_ALL_FPRS) {
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MOVAPD(MDisp(RSP, (int)xmm_offset), (X64Reg)(x - 16));
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xmm_offset += 16;
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}
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return shadow;
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}
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#ifdef _M_IX86 // All32
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void XEmitter::ABI_PopRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size) {
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size_t shadow, subtraction, xmm_offset;
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ABI_CalculateFrameSize(mask, rsp_alignment, needed_frame_size, &shadow, &subtraction, &xmm_offset);
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// Shared code between Win32 and Unix32
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void XEmitter::ABI_CallFunction(const void *func) {
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ABI_AlignStack(0);
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CALL(func);
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ABI_RestoreStack(0);
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}
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for (int x : mask & ABI_ALL_FPRS) {
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MOVAPD((X64Reg) (x - 16), MDisp(RSP, (int)xmm_offset));
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xmm_offset += 16;
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}
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void XEmitter::ABI_CallFunctionC16(const void *func, u16 param1) {
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ABI_AlignStack(1 * 2);
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PUSH(16, Imm16(param1));
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CALL(func);
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ABI_RestoreStack(1 * 2);
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}
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if (subtraction)
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ADD(64, R(RSP), subtraction >= 0x80 ? Imm32((u32)subtraction) : Imm8((u8)subtraction));
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void XEmitter::ABI_CallFunctionCC16(const void *func, u32 param1, u16 param2) {
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ABI_AlignStack(1 * 2 + 1 * 4);
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PUSH(16, Imm16(param2));
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(1 * 2 + 1 * 4);
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}
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void XEmitter::ABI_CallFunctionC(const void *func, u32 param1) {
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ABI_AlignStack(1 * 4);
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(1 * 4);
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}
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void XEmitter::ABI_CallFunctionCC(const void *func, u32 param1, u32 param2) {
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ABI_AlignStack(2 * 4);
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PUSH(32, Imm32(param2));
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(2 * 4);
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}
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void XEmitter::ABI_CallFunctionCCC(const void *func, u32 param1, u32 param2, u32 param3) {
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ABI_AlignStack(3 * 4);
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PUSH(32, Imm32(param3));
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PUSH(32, Imm32(param2));
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(3 * 4);
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}
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void XEmitter::ABI_CallFunctionCCP(const void *func, u32 param1, u32 param2, void *param3) {
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ABI_AlignStack(3 * 4);
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PUSH(32, ImmPtr(param3));
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PUSH(32, Imm32(param2));
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(3 * 4);
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}
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void XEmitter::ABI_CallFunctionCCCP(const void *func, u32 param1, u32 param2,u32 param3, void *param4) {
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ABI_AlignStack(4 * 4);
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PUSH(32, ImmPtr(param4));
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PUSH(32, Imm32(param3));
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PUSH(32, Imm32(param2));
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PUSH(32, Imm32(param1));
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CALL(func);
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ABI_RestoreStack(4 * 4);
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}
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void XEmitter::ABI_CallFunctionP(const void *func, void *param1) {
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ABI_AlignStack(1 * 4);
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PUSH(32, ImmPtr(param1));
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CALL(func);
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ABI_RestoreStack(1 * 4);
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}
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void XEmitter::ABI_CallFunctionPA(const void *func, void *param1, const Gen::OpArg &arg2) {
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ABI_AlignStack(2 * 4);
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PUSH(32, arg2);
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PUSH(32, ImmPtr(param1));
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CALL(func);
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ABI_RestoreStack(2 * 4);
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}
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void XEmitter::ABI_CallFunctionPAA(const void *func, void *param1, const Gen::OpArg &arg2, const Gen::OpArg &arg3) {
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ABI_AlignStack(3 * 4);
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PUSH(32, arg3);
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PUSH(32, arg2);
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PUSH(32, ImmPtr(param1));
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CALL(func);
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ABI_RestoreStack(3 * 4);
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}
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void XEmitter::ABI_CallFunctionPPC(const void *func, void *param1, void *param2, u32 param3) {
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ABI_AlignStack(3 * 4);
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PUSH(32, Imm32(param3));
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PUSH(32, ImmPtr(param2));
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PUSH(32, ImmPtr(param1));
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CALL(func);
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ABI_RestoreStack(3 * 4);
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}
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// Pass a register as a parameter.
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void XEmitter::ABI_CallFunctionR(const void *func, X64Reg reg1) {
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ABI_AlignStack(1 * 4);
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PUSH(32, R(reg1));
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CALL(func);
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ABI_RestoreStack(1 * 4);
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}
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// Pass two registers as parameters.
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void XEmitter::ABI_CallFunctionRR(const void *func, Gen::X64Reg reg1, Gen::X64Reg reg2)
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{
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ABI_AlignStack(2 * 4);
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PUSH(32, R(reg2));
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PUSH(32, R(reg1));
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CALL(func);
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ABI_RestoreStack(2 * 4);
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}
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void XEmitter::ABI_CallFunctionAC(const void *func, const Gen::OpArg &arg1, u32 param2)
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{
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ABI_AlignStack(2 * 4);
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PUSH(32, Imm32(param2));
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PUSH(32, arg1);
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CALL(func);
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ABI_RestoreStack(2 * 4);
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}
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void XEmitter::ABI_CallFunctionACC(const void *func, const Gen::OpArg &arg1, u32 param2, u32 param3)
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{
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ABI_AlignStack(3 * 4);
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PUSH(32, Imm32(param3));
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PUSH(32, Imm32(param2));
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PUSH(32, arg1);
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CALL(func);
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ABI_RestoreStack(3 * 4);
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}
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void XEmitter::ABI_CallFunctionA(const void *func, const Gen::OpArg &arg1)
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{
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ABI_AlignStack(1 * 4);
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PUSH(32, arg1);
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CALL(func);
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ABI_RestoreStack(1 * 4);
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}
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void XEmitter::ABI_CallFunctionAA(const void *func, const Gen::OpArg &arg1, const Gen::OpArg &arg2)
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{
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ABI_AlignStack(2 * 4);
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PUSH(32, arg2);
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PUSH(32, arg1);
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CALL(func);
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ABI_RestoreStack(2 * 4);
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}
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void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
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// Note: 4 * 4 = 16 bytes, so alignment is preserved.
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PUSH(EBP);
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PUSH(EBX);
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PUSH(ESI);
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PUSH(EDI);
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}
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void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
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POP(EDI);
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POP(ESI);
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POP(EBX);
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POP(EBP);
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}
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unsigned int XEmitter::ABI_GetAlignedFrameSize(unsigned int frameSize) {
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frameSize += 4; // reserve space for return address
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unsigned int alignedSize =
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#ifdef __GNUC__
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(frameSize + 15) & -16;
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#else
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(frameSize + 3) & -4;
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#endif
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return alignedSize;
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}
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void XEmitter::ABI_AlignStack(unsigned int frameSize) {
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// Mac OS X requires the stack to be 16-byte aligned before every call.
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// Linux requires the stack to be 16-byte aligned before calls that put SSE
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// vectors on the stack, but since we do not keep track of which calls do that,
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// it is effectively every call as well.
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// Windows binaries compiled with MSVC do not have such a restriction*, but I
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// expect that GCC on Windows acts the same as GCC on Linux in this respect.
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// It would be nice if someone could verify this.
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// *However, the MSVC optimizing compiler assumes a 4-byte-aligned stack at times.
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unsigned int fillSize =
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ABI_GetAlignedFrameSize(frameSize) - (frameSize + 4);
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if (fillSize != 0) {
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SUB(32, R(ESP), Imm8(fillSize));
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for (int r = 15; r >= 0; r--) {
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if (mask[r])
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POP((X64Reg)r);
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}
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}
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void XEmitter::ABI_RestoreStack(unsigned int frameSize) {
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unsigned int alignedSize = ABI_GetAlignedFrameSize(frameSize);
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alignedSize -= 4; // return address is POPped at end of call
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if (alignedSize != 0) {
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ADD(32, R(ESP), Imm8(alignedSize));
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}
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}
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#else //64bit
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// Common functions
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void XEmitter::ABI_CallFunction(const void *func) {
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u64 distance = u64(func) - (u64(code) + 5);
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@ -538,143 +360,4 @@ void XEmitter::ABI_CallFunctionAA(const void *func, const Gen::OpArg &arg1, cons
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} else {
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CALL(func);
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}
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}
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unsigned int XEmitter::ABI_GetAlignedFrameSize(unsigned int frameSize) {
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return frameSize;
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}
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#ifdef _WIN32
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// The Windows x64 ABI requires XMM6 - XMM15 to be callee saved. 10 regs.
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// But, not saving XMM4 and XMM5 breaks things in VS 2010, even though they are volatile regs.
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// Let's just save all 16.
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const int XMM_STACK_SPACE = 16 * 16;
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// Win64 Specific Code
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void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
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//we only want to do this once
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PUSH(RBX);
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PUSH(RSI);
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PUSH(RDI);
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PUSH(RBP);
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PUSH(R12);
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PUSH(R13);
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PUSH(R14);
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PUSH(R15);
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ABI_AlignStack(0);
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// Do this after aligning, because before it's offset by 8.
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SUB(64, R(RSP), Imm32(XMM_STACK_SPACE));
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for (int i = 0; i < 16; ++i)
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MOVAPS(MDisp(RSP, i * 16), (X64Reg)(XMM0 + i));
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}
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void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
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for (int i = 0; i < 16; ++i)
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MOVAPS((X64Reg)(XMM0 + i), MDisp(RSP, i * 16));
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ADD(64, R(RSP), Imm32(XMM_STACK_SPACE));
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ABI_RestoreStack(0);
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POP(R15);
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POP(R14);
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POP(R13);
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POP(R12);
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POP(RBP);
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POP(RDI);
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POP(RSI);
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POP(RBX);
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}
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// Win64 Specific Code
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void XEmitter::ABI_PushAllCallerSavedRegsAndAdjustStack() {
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PUSH(RCX);
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PUSH(RDX);
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PUSH(RSI);
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PUSH(RDI);
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PUSH(R8);
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PUSH(R9);
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PUSH(R10);
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PUSH(R11);
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// TODO: Callers preserve XMM4-5 (XMM0-3 are args.)
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ABI_AlignStack(0);
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}
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void XEmitter::ABI_PopAllCallerSavedRegsAndAdjustStack() {
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ABI_RestoreStack(0);
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POP(R11);
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POP(R10);
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POP(R9);
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POP(R8);
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POP(RDI);
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POP(RSI);
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POP(RDX);
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POP(RCX);
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}
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void XEmitter::ABI_AlignStack(unsigned int /*frameSize*/) {
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SUB(64, R(RSP), Imm8(0x28));
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}
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void XEmitter::ABI_RestoreStack(unsigned int /*frameSize*/) {
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ADD(64, R(RSP), Imm8(0x28));
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}
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#else
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// Unix64 Specific Code
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void XEmitter::ABI_PushAllCalleeSavedRegsAndAdjustStack() {
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PUSH(RBX);
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PUSH(RBP);
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PUSH(R12);
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PUSH(R13);
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PUSH(R14);
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PUSH(R15);
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PUSH(R15); //just to align stack. duped push/pop doesn't hurt.
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// TODO: XMM?
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}
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void XEmitter::ABI_PopAllCalleeSavedRegsAndAdjustStack() {
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POP(R15);
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POP(R15);
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POP(R14);
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POP(R13);
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POP(R12);
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POP(RBP);
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POP(RBX);
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}
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void XEmitter::ABI_PushAllCallerSavedRegsAndAdjustStack() {
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PUSH(RCX);
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PUSH(RDX);
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PUSH(RSI);
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PUSH(RDI);
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PUSH(R8);
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PUSH(R9);
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PUSH(R10);
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PUSH(R11);
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PUSH(R11);
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}
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void XEmitter::ABI_PopAllCallerSavedRegsAndAdjustStack() {
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POP(R11);
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POP(R11);
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POP(R10);
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POP(R9);
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POP(R8);
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POP(RDI);
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POP(RSI);
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POP(RDX);
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POP(RCX);
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}
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void XEmitter::ABI_AlignStack(unsigned int /*frameSize*/) {
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SUB(64, R(RSP), Imm8(0x08));
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}
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void XEmitter::ABI_RestoreStack(unsigned int /*frameSize*/) {
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ADD(64, R(RSP), Imm8(0x08));
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}
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#endif // WIN32
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#endif // 32bit
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}
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@ -1,35 +1,15 @@
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// Copyright (C) 2003 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
|
||||
// Copyright 2008 Dolphin Emulator Project
|
||||
// Licensed under GPLv2+
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/common_types.h"
|
||||
#include "common/bit_set.h"
|
||||
#include "emitter.h"
|
||||
|
||||
// x86/x64 ABI:s, and helpers to help follow them when JIT-ing code.
|
||||
// x64 ABI:s, and helpers to help follow them when JIT-ing code.
|
||||
// All convensions return values in EAX (+ possibly EDX).
|
||||
|
||||
// Linux 32-bit, Windows 32-bit (cdecl, System V):
|
||||
// * Caller pushes left to right
|
||||
// * Caller fixes stack after call
|
||||
// * function subtract from stack for local storage only.
|
||||
// Scratch: EAX ECX EDX
|
||||
// Callee-save: EBX ESI EDI EBP
|
||||
// Parameters: -
|
||||
|
||||
// Windows 64-bit
|
||||
// * 4-reg "fastcall" variant, very new-skool stack handling
|
||||
// * Callee moves stack pointer, to make room for shadow regs for the biggest function _it itself calls_
|
||||
|
|
@ -44,18 +24,8 @@
|
|||
// Callee-save: RBX RBP R12 R13 R14 R15
|
||||
// Parameters: RDI RSI RDX RCX R8 R9
|
||||
|
||||
#ifdef _M_IX86 // 32 bit calling convention, shared by all
|
||||
|
||||
// 32-bit don't pass parameters in regs, but these are convenient to have anyway when we have to
|
||||
// choose regs to put stuff in.
|
||||
#define ABI_PARAM1 RCX
|
||||
#define ABI_PARAM2 RDX
|
||||
|
||||
// There are no ABI_PARAM* here, since args are pushed.
|
||||
// 32-bit bog standard cdecl, shared between linux and windows
|
||||
// MacOSX 32-bit is same as System V with a few exceptions that we probably don't care much about.
|
||||
|
||||
#elif ARCHITECTURE_x86_64 // 64 bit calling convention
|
||||
#define ABI_ALL_FPRS BitSet32(0xffff0000)
|
||||
#define ABI_ALL_GPRS BitSet32(0x0000ffff)
|
||||
|
||||
#ifdef _WIN32 // 64-bit Windows - the really exotic calling convention
|
||||
|
||||
|
|
@ -64,7 +34,11 @@
|
|||
#define ABI_PARAM3 R8
|
||||
#define ABI_PARAM4 R9
|
||||
|
||||
#else //64-bit Unix (hopefully MacOSX too)
|
||||
// xmm0-xmm15 use the upper 16 bits in the functions that push/pop registers.
|
||||
#define ABI_ALL_CALLER_SAVED \
|
||||
(BitSet32 { RAX, RCX, RDX, R8, R9, R10, R11, \
|
||||
XMM0+16, XMM1+16, XMM2+16, XMM3+16, XMM4+16, XMM5+16 })
|
||||
#else //64-bit Unix / OS X
|
||||
|
||||
#define ABI_PARAM1 RDI
|
||||
#define ABI_PARAM2 RSI
|
||||
|
|
@ -73,6 +47,13 @@
|
|||
#define ABI_PARAM5 R8
|
||||
#define ABI_PARAM6 R9
|
||||
|
||||
// TODO: Avoid pushing all 16 XMM registers when possible. Most functions we call probably
|
||||
// don't actually clobber them.
|
||||
#define ABI_ALL_CALLER_SAVED \
|
||||
(BitSet32 { RAX, RCX, RDX, RDI, RSI, R8, R9, R10, R11 } | \
|
||||
ABI_ALL_FPRS)
|
||||
#endif // WIN32
|
||||
|
||||
#endif // X86
|
||||
#define ABI_ALL_CALLEE_SAVED (~ABI_ALL_CALLER_SAVED)
|
||||
|
||||
#define ABI_RETURN RAX
|
||||
|
|
|
|||
|
|
@ -18,6 +18,7 @@
|
|||
#pragma once
|
||||
|
||||
#include "common/assert.h"
|
||||
#include "common/bit_set.h"
|
||||
#include "common/common_types.h"
|
||||
#include "common/code_block.h"
|
||||
|
||||
|
|
@ -356,7 +357,7 @@ private:
|
|||
void WriteFloatLoadStore(int bits, FloatOp op, FloatOp op_80b, const OpArg& arg);
|
||||
void WriteNormalOp(XEmitter *emit, int bits, NormalOp op, const OpArg& a1, const OpArg& a2);
|
||||
|
||||
void ABI_CalculateFrameSize(u32 mask, size_t rsp_alignment, size_t needed_frame_size, size_t* shadowp, size_t* subtractionp, size_t* xmm_offsetp);
|
||||
void ABI_CalculateFrameSize(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size, size_t* shadowp, size_t* subtractionp, size_t* xmm_offsetp);
|
||||
|
||||
protected:
|
||||
void Write8(u8 value);
|
||||
|
|
@ -1007,25 +1008,26 @@ public:
|
|||
ABI_CallFunctionC((const void*)func, param1);
|
||||
}
|
||||
|
||||
// A function that doesn't have any control over what it will do to regs,
|
||||
// such as the dispatcher, should be surrounded by these.
|
||||
void ABI_PushAllCalleeSavedRegsAndAdjustStack();
|
||||
void ABI_PopAllCalleeSavedRegsAndAdjustStack();
|
||||
/**
|
||||
* Saves specified registers and adjusts the stack to be 16-byte aligned as required by the ABI
|
||||
*
|
||||
* @param mask Registers to push on the stack (high 16 bits are XMMs, low 16 bits are GPRs)
|
||||
* @param rsp_alignment Current alignment of the stack pointer, must be 0 or 8
|
||||
* @param needed_frame_size Additional space needed, e.g., for function arguments passed on the stack
|
||||
* @return Size of the shadow space, i.e., offset of the frame
|
||||
*/
|
||||
size_t ABI_PushRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size = 0);
|
||||
|
||||
// A function that doesn't know anything about it's surroundings, should
|
||||
// be surrounded by these to establish a safe environment, where it can roam free.
|
||||
// An example is a backpatch injected function.
|
||||
void ABI_PushAllCallerSavedRegsAndAdjustStack();
|
||||
void ABI_PopAllCallerSavedRegsAndAdjustStack();
|
||||
|
||||
unsigned int ABI_GetAlignedFrameSize(unsigned int frameSize);
|
||||
void ABI_AlignStack(unsigned int frameSize);
|
||||
void ABI_RestoreStack(unsigned int frameSize);
|
||||
|
||||
// Sets up a __cdecl function.
|
||||
// Only x64 really needs the parameter count.
|
||||
void ABI_EmitPrologue(int maxCallParams);
|
||||
void ABI_EmitEpilogue(int maxCallParams);
|
||||
/**
|
||||
* Restores specified registers and adjusts the stack to its original alignment, i.e., the alignment before
|
||||
* the matching PushRegistersAndAdjustStack.
|
||||
*
|
||||
* @param mask Registers to restores from the stack (high 16 bits are XMMs, low 16 bits are GPRs)
|
||||
* @param rsp_alignment Original alignment before the matching PushRegistersAndAdjustStack, must be 0 or 8
|
||||
* @param needed_frame_size Additional space that was needed
|
||||
* @warning Stack must be currently 16-byte aligned
|
||||
*/
|
||||
void ABI_PopRegistersAndAdjustStack(BitSet32 mask, size_t rsp_alignment, size_t needed_frame_size = 0);
|
||||
|
||||
#ifdef _M_IX86
|
||||
static int ABI_GetNumXMMRegs() { return 8; }
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue