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x64 JIT: Allocate constant data outside of the guest heap.

This commit is contained in:
Dr. Chat 2016-08-18 18:26:55 -05:00
parent 784e6a7593
commit e3fdb08ad7
5 changed files with 127 additions and 93 deletions
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9
src/xenia/cpu/backend/x64/x64_backend.cc
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@ -41,7 +41,7 @@ class X64ThunkEmitter : public X64Emitter {
};
X64Backend::X64Backend(Processor* processor)
: Backend(processor), code_cache_(nullptr), emitter_data_(0) {
: Backend(processor), code_cache_(nullptr) {
if (cs_open(CS_ARCH_X86, CS_MODE_64, &capstone_handle_) != CS_ERR_OK) {
assert_always("Failed to initialize capstone");
}
@ -51,14 +51,11 @@ X64Backend::X64Backend(Processor* processor)
}
X64Backend::~X64Backend() {
if (emitter_data_) {
processor()->memory()->SystemHeapFree(emitter_data_);
emitter_data_ = 0;
}
if (capstone_handle_) {
cs_close(&capstone_handle_);
}
X64Emitter::FreeConstData(emitter_data_);
ExceptionHandler::Uninstall(&ExceptionCallbackThunk, this);
}
@ -114,7 +111,7 @@ bool X64Backend::Initialize() {
code_cache_->CommitExecutableRange(0x9FFF0000, 0x9FFFFFFF);
// Allocate emitter constant data.
emitter_data_ = X64Emitter::PlaceData(processor()->memory());
emitter_data_ = X64Emitter::PlaceConstData();
// Setup exception callback
ExceptionHandler::Install(&ExceptionCallbackThunk, this);

5
src/xenia/cpu/backend/x64/x64_backend.h
View File

@ -42,7 +42,7 @@ class X64Backend : public Backend {
~X64Backend() override;
X64CodeCache* code_cache() const { return code_cache_.get(); }
uint32_t emitter_data() const { return emitter_data_; }
uintptr_t emitter_data() const { return emitter_data_; }
// Call a generated function, saving all stack parameters.
HostToGuestThunk host_to_guest_thunk() const { return host_to_guest_thunk_; }
@ -76,8 +76,7 @@ class X64Backend : public Backend {
uintptr_t capstone_handle_ = 0;
std::unique_ptr<X64CodeCache> code_cache_;
uint32_t emitter_data_;
uintptr_t emitter_data_ = 0;
HostToGuestThunk host_to_guest_thunk_;
GuestToHostThunk guest_to_host_thunk_;

199
src/xenia/cpu/backend/x64/x64_emitter.cc
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@ -296,7 +296,7 @@ uint64_t TrapDebugPrint(void* raw_context, uint64_t address) {
XELOGD("(DebugPrint) %s", str);
if (FLAGS_enable_debugprint_log) {
debugging::DebugPrint("(DebugPrint) %s\n", str);
debugging::DebugPrint("(DebugPrint) %s", str);
}
return 0;
@ -556,6 +556,7 @@ void X64Emitter::ReloadEDX() {
// Len Assembly Byte Sequence
// ============================================================================
// 1b NOP 90H
// 2b 66 NOP 66 90H
// 3b NOP DWORD ptr [EAX] 0F 1F 00H
// 4b NOP DWORD ptr [EAX + 00H] 0F 1F 40 00H
@ -602,90 +603,124 @@ void X64Emitter::MovMem64(const Xbyak::RegExp& addr, uint64_t v) {
}
}
uint32_t X64Emitter::PlaceData(Memory* memory) {
static const vec128_t xmm_consts[] = {
/* XMMZero */ vec128f(0.0f),
/* XMMOne */ vec128f(1.0f),
/* XMMNegativeOne */ vec128f(-1.0f, -1.0f, -1.0f, -1.0f),
/* XMMFFFF */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu, 0xFFFFFFFFu),
/* XMMMaskX16Y16 */ vec128i(0x0000FFFFu, 0xFFFF0000u,
0x00000000u, 0x00000000u),
/* XMMFlipX16Y16 */ vec128i(0x00008000u, 0x00000000u,
0x00000000u, 0x00000000u),
/* XMMFixX16Y16 */ vec128f(-32768.0f, 0.0f, 0.0f, 0.0f),
/* XMMNormalizeX16Y16 */ vec128f(
1.0f / 32767.0f, 1.0f / (32767.0f * 65536.0f), 0.0f, 0.0f),
/* XMM0001 */ vec128f(0.0f, 0.0f, 0.0f, 1.0f),
/* XMM3301 */ vec128f(3.0f, 3.0f, 0.0f, 1.0f),
/* XMM3333 */ vec128f(3.0f, 3.0f, 3.0f, 3.0f),
/* XMMSignMaskPS */ vec128i(0x80000000u, 0x80000000u,
0x80000000u, 0x80000000u),
/* XMMSignMaskPD */ vec128i(0x00000000u, 0x80000000u,
0x00000000u, 0x80000000u),
/* XMMAbsMaskPS */ vec128i(0x7FFFFFFFu, 0x7FFFFFFFu,
0x7FFFFFFFu, 0x7FFFFFFFu),
/* XMMAbsMaskPD */ vec128i(0xFFFFFFFFu, 0x7FFFFFFFu,
0xFFFFFFFFu, 0x7FFFFFFFu),
/* XMMByteSwapMask */ vec128i(0x00010203u, 0x04050607u,
0x08090A0Bu, 0x0C0D0E0Fu),
/* XMMByteOrderMask */ vec128i(0x01000302u, 0x05040706u,
0x09080B0Au, 0x0D0C0F0Eu),
/* XMMPermuteControl15 */ vec128b(15),
/* XMMPermuteByteMask */ vec128b(0x1F),
/* XMMPackD3DCOLORSat */ vec128i(0x404000FFu),
/* XMMPackD3DCOLOR */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu, 0x0C000408u),
/* XMMUnpackD3DCOLOR */ vec128i(0xFFFFFF0Eu, 0xFFFFFF0Du,
0xFFFFFF0Cu, 0xFFFFFF0Fu),
/* XMMPackFLOAT16_2 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu, 0x01000302u),
/* XMMUnpackFLOAT16_2 */ vec128i(0x0D0C0F0Eu, 0xFFFFFFFFu,
0xFFFFFFFFu, 0xFFFFFFFFu),
/* XMMPackFLOAT16_4 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu,
0x05040706u, 0x01000302u),
/* XMMUnpackFLOAT16_4 */ vec128i(0x09080B0Au, 0x0D0C0F0Eu,
0xFFFFFFFFu, 0xFFFFFFFFu),
/* XMMPackSHORT_2Min */ vec128i(0x403F8001u),
/* XMMPackSHORT_2Max */ vec128i(0x40407FFFu),
/* XMMPackSHORT_2 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu, 0x01000504u),
/* XMMUnpackSHORT_2 */ vec128i(0xFFFF0F0Eu, 0xFFFF0D0Cu,
0xFFFFFFFFu, 0xFFFFFFFFu),
/* XMMOneOver255 */ vec128f(1.0f / 255.0f),
/* XMMMaskEvenPI16 */ vec128i(0x0000FFFFu, 0x0000FFFFu,
0x0000FFFFu, 0x0000FFFFu),
/* XMMShiftMaskEvenPI16 */ vec128i(0x0000000Fu, 0x0000000Fu,
0x0000000Fu, 0x0000000Fu),
/* XMMShiftMaskPS */ vec128i(0x0000001Fu, 0x0000001Fu,
0x0000001Fu, 0x0000001Fu),
/* XMMShiftByteMask */ vec128i(0x000000FFu, 0x000000FFu,
0x000000FFu, 0x000000FFu),
/* XMMSwapWordMask */ vec128i(0x03030303u, 0x03030303u,
0x03030303u, 0x03030303u),
/* XMMUnsignedDwordMax */ vec128i(0xFFFFFFFFu, 0x00000000u,
0xFFFFFFFFu, 0x00000000u),
/* XMM255 */ vec128f(255.0f),
/* XMMPI32 */ vec128i(32),
/* XMMSignMaskI8 */ vec128i(0x80808080u, 0x80808080u,
0x80808080u, 0x80808080u),
/* XMMSignMaskI16 */ vec128i(0x80008000u, 0x80008000u,
0x80008000u, 0x80008000u),
/* XMMSignMaskI32 */ vec128i(0x80000000u, 0x80000000u,
0x80000000u, 0x80000000u),
/* XMMSignMaskF32 */ vec128i(0x80000000u, 0x80000000u,
0x80000000u, 0x80000000u),
/* XMMShortMinPS */ vec128f(SHRT_MIN),
/* XMMShortMaxPS */ vec128f(SHRT_MAX),
};
uint32_t ptr = memory->SystemHeapAlloc(sizeof(xmm_consts));
std::memcpy(memory->TranslateVirtual(ptr), xmm_consts, sizeof(xmm_consts));
return ptr;
static const vec128_t xmm_consts[] = {
/* XMMZero */ vec128f(0.0f),
/* XMMOne */ vec128f(1.0f),
/* XMMNegativeOne */ vec128f(-1.0f, -1.0f, -1.0f, -1.0f),
/* XMMFFFF */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu),
/* XMMMaskX16Y16 */ vec128i(0x0000FFFFu, 0xFFFF0000u, 0x00000000u,
0x00000000u),
/* XMMFlipX16Y16 */ vec128i(0x00008000u, 0x00000000u, 0x00000000u,
0x00000000u),
/* XMMFixX16Y16 */ vec128f(-32768.0f, 0.0f, 0.0f, 0.0f),
/* XMMNormalizeX16Y16 */ vec128f(
1.0f / 32767.0f, 1.0f / (32767.0f * 65536.0f), 0.0f, 0.0f),
/* XMM0001 */ vec128f(0.0f, 0.0f, 0.0f, 1.0f),
/* XMM3301 */ vec128f(3.0f, 3.0f, 0.0f, 1.0f),
/* XMM3333 */ vec128f(3.0f, 3.0f, 3.0f, 3.0f),
/* XMMSignMaskPS */ vec128i(0x80000000u, 0x80000000u, 0x80000000u,
0x80000000u),
/* XMMSignMaskPD */ vec128i(0x00000000u, 0x80000000u, 0x00000000u,
0x80000000u),
/* XMMAbsMaskPS */ vec128i(0x7FFFFFFFu, 0x7FFFFFFFu, 0x7FFFFFFFu,
0x7FFFFFFFu),
/* XMMAbsMaskPD */ vec128i(0xFFFFFFFFu, 0x7FFFFFFFu, 0xFFFFFFFFu,
0x7FFFFFFFu),
/* XMMByteSwapMask */ vec128i(0x00010203u, 0x04050607u, 0x08090A0Bu,
0x0C0D0E0Fu),
/* XMMByteOrderMask */ vec128i(0x01000302u, 0x05040706u, 0x09080B0Au,
0x0D0C0F0Eu),
/* XMMPermuteControl15 */ vec128b(15),
/* XMMPermuteByteMask */ vec128b(0x1F),
/* XMMPackD3DCOLORSat */ vec128i(0x404000FFu),
/* XMMPackD3DCOLOR */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu,
0x0C000408u),
/* XMMUnpackD3DCOLOR */ vec128i(0xFFFFFF0Eu, 0xFFFFFF0Du, 0xFFFFFF0Cu,
0xFFFFFF0Fu),
/* XMMPackFLOAT16_2 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu,
0x01000302u),
/* XMMUnpackFLOAT16_2 */ vec128i(0x0D0C0F0Eu, 0xFFFFFFFFu, 0xFFFFFFFFu,
0xFFFFFFFFu),
/* XMMPackFLOAT16_4 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0x05040706u,
0x01000302u),
/* XMMUnpackFLOAT16_4 */ vec128i(0x09080B0Au, 0x0D0C0F0Eu, 0xFFFFFFFFu,
0xFFFFFFFFu),
/* XMMPackSHORT_2Min */ vec128i(0x403F8001u),
/* XMMPackSHORT_2Max */ vec128i(0x40407FFFu),
/* XMMPackSHORT_2 */ vec128i(0xFFFFFFFFu, 0xFFFFFFFFu, 0xFFFFFFFFu,
0x01000504u),
/* XMMUnpackSHORT_2 */ vec128i(0xFFFF0F0Eu, 0xFFFF0D0Cu, 0xFFFFFFFFu,
0xFFFFFFFFu),
/* XMMOneOver255 */ vec128f(1.0f / 255.0f),
/* XMMMaskEvenPI16 */ vec128i(0x0000FFFFu, 0x0000FFFFu, 0x0000FFFFu,
0x0000FFFFu),
/* XMMShiftMaskEvenPI16 */ vec128i(0x0000000Fu, 0x0000000Fu, 0x0000000Fu,
0x0000000Fu),
/* XMMShiftMaskPS */ vec128i(0x0000001Fu, 0x0000001Fu, 0x0000001Fu,
0x0000001Fu),
/* XMMShiftByteMask */ vec128i(0x000000FFu, 0x000000FFu, 0x000000FFu,
0x000000FFu),
/* XMMSwapWordMask */ vec128i(0x03030303u, 0x03030303u, 0x03030303u,
0x03030303u),
/* XMMUnsignedDwordMax */ vec128i(0xFFFFFFFFu, 0x00000000u, 0xFFFFFFFFu,
0x00000000u),
/* XMM255 */ vec128f(255.0f),
/* XMMPI32 */ vec128i(32),
/* XMMSignMaskI8 */ vec128i(0x80808080u, 0x80808080u, 0x80808080u,
0x80808080u),
/* XMMSignMaskI16 */ vec128i(0x80008000u, 0x80008000u, 0x80008000u,
0x80008000u),
/* XMMSignMaskI32 */ vec128i(0x80000000u, 0x80000000u, 0x80000000u,
0x80000000u),
/* XMMSignMaskF32 */ vec128i(0x80000000u, 0x80000000u, 0x80000000u,
0x80000000u),
/* XMMShortMinPS */ vec128f(SHRT_MIN),
/* XMMShortMaxPS */ vec128f(SHRT_MAX),
};
// First location to try and place constants.
static const uintptr_t kConstDataLocation = 0x20000000;
static const uintptr_t kConstDataSize = sizeof(xmm_consts);
// Increment the location by this amount for every allocation failure.
static const uintptr_t kConstDataIncrement = 0x00010000;
// This function places constant data that is used by the emitter later on.
// Only called once and used by multiple instances of the emitter.
//
// TODO(DrChat): This should be placed in the code cache with the code, but
// doing so requires RIP-relative addressing, which is difficult to support
// given the current setup.
uintptr_t X64Emitter::PlaceConstData() {
uint8_t* ptr = reinterpret_cast<uint8_t*>(kConstDataLocation);
void* mem = nullptr;
while (!mem) {
mem = memory::AllocFixed(
ptr, xe::round_up(kConstDataSize, memory::page_size()),
memory::AllocationType::kReserveCommit, memory::PageAccess::kReadWrite);
ptr += kConstDataIncrement;
}
// The pointer must not be greater than 31 bits.
assert_zero(reinterpret_cast<uintptr_t>(mem) & ~0x7FFFFFFF);
std::memcpy(mem, xmm_consts, sizeof(xmm_consts));
memory::Protect(mem, kConstDataSize, memory::PageAccess::kReadOnly, nullptr);
return reinterpret_cast<uintptr_t>(mem);
}
void X64Emitter::FreeConstData(uintptr_t data) {
memory::DeallocFixed(reinterpret_cast<void*>(data), 0,
memory::DeallocationType::kDecommitRelease);
}
Xbyak::Address X64Emitter::GetXmmConstPtr(XmmConst id) {
// Load through fixed constant table setup by PlaceData.
return ptr[rdx + backend_->emitter_data() + sizeof(vec128_t) * id];
// Load through fixed constant table setup by PlaceConstData.
// It's important that the pointer is not signed, as it will be sign-extended.
return ptr[reinterpret_cast<void*>(backend_->emitter_data() +
sizeof(vec128_t) * id)];
}
void X64Emitter::LoadConstantXmm(Xbyak::Xmm dest, const vec128_t& v) {

5
src/xenia/cpu/backend/x64/x64_emitter.h
View File

@ -114,13 +114,14 @@ class X64Emitter : public Xbyak::CodeGenerator {
Processor* processor() const { return processor_; }
X64Backend* backend() const { return backend_; }
static uintptr_t PlaceConstData();
static void FreeConstData(uintptr_t data);
bool Emit(GuestFunction* function, hir::HIRBuilder* builder,
uint32_t debug_info_flags, FunctionDebugInfo* debug_info,
void** out_code_address, size_t* out_code_size,
std::vector<SourceMapEntry>* out_source_map);
static uint32_t PlaceData(Memory* memory);
public:
// Reserved: rsp
// Scratch: rax/rcx/rdx

2
src/xenia/cpu/backend/x64/x64_sequences.cc
View File

@ -610,6 +610,7 @@ struct Sequence {
reg_reg_fn(e, i.src2, temp);
}
} else if (i.src2.is_constant) {
assert_true(!i.src1.is_constant);
if (i.src2.ConstantFitsIn32Reg()) {
reg_const_fn(e, i.src1, static_cast<int32_t>(i.src2.constant()));
} else {
@ -636,6 +637,7 @@ struct Sequence {
reg_reg_fn(e, i.dest, i.src2, temp, true);
}
} else if (i.src2.is_constant) {
assert_true(!i.src1.is_constant);
if (i.src2.ConstantFitsIn32Reg()) {
reg_const_fn(e, i.dest, i.src1, static_cast<int32_t>(i.src2.constant()),
false);