fabi/Xenia-Canary
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Dirty page table. Not yet used.

Browse Source
This commit is contained in:
Ben Vanik
2014-06-02 07:49:45 -07:00
parent ddbebcda6c
commit beb5ee40ee
9 changed files with 56 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src/alloy/backend/x64/x64_emitter.cc
View File

@@ -446,6 +446,11 @@ void X64Emitter::StoreEflags() {
#endif // STORE_EFLAGS
}
uint32_t X64Emitter::page_table_address() const {
uint64_t addr = runtime_->memory()->page_table();
return static_cast<uint32_t>(addr);
}
bool X64Emitter::ConstantFitsIn32Reg(uint64_t v) {
if ((v & ~0x7FFFFFFF) == 0) {
// Fits under 31 bits, so just load using normal mov.

2
src/alloy/backend/x64/x64_emitter.h
View File

@@ -132,6 +132,8 @@ public:
void LoadEflags();
void StoreEflags();
uint32_t page_table_address() const;
// Moves a 64bit immediate into memory.
bool ConstantFitsIn32Reg(uint64_t v);
void MovMem64(const Xbyak::RegExp& addr, uint64_t v);

20
src/alloy/backend/x64/x64_sequences.cc
View File

@@ -1563,6 +1563,12 @@ EMITTER_OPCODE_TABLE(
// OPCODE_STORE
// ============================================================================
// Note: most *should* be aligned, but needs to be checked!
void EmitMarkPageDirty(X64Emitter& e, RegExp& addr) {
// 16KB pages.
e.shr(e.eax, 14);
e.and(e.eax, 0x7FFF);
e.mov(e.byte[e.rdx + e.rax + e.page_table_address()], 1);
}
EMITTER(STORE_I8, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
auto addr = ComputeMemoryAddress(e, i.src1);
@@ -1571,7 +1577,9 @@ EMITTER(STORE_I8, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I8<>>)) {
} else {
e.mov(e.byte[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8b, e.byte[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreI8);
@@ -1586,7 +1594,9 @@ EMITTER(STORE_I16, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I16<>>)) {
} else {
e.mov(e.word[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8w, e.word[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreI16);
@@ -1601,7 +1611,9 @@ EMITTER(STORE_I32, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I32<>>)) {
} else {
e.mov(e.dword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8d, e.dword[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreI32);
@@ -1616,7 +1628,9 @@ EMITTER(STORE_I64, MATCH(I<OPCODE_STORE, VoidOp, I64<>, I64<>>)) {
} else {
e.mov(e.qword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.mov(e.r8, e.qword[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreI64);
@@ -1631,7 +1645,9 @@ EMITTER(STORE_F32, MATCH(I<OPCODE_STORE, VoidOp, I64<>, F32<>>)) {
} else {
e.vmovss(e.dword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreF32);
@@ -1646,7 +1662,9 @@ EMITTER(STORE_F64, MATCH(I<OPCODE_STORE, VoidOp, I64<>, F64<>>)) {
} else {
e.vmovsd(e.qword[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreF64);
@@ -1662,7 +1680,9 @@ EMITTER(STORE_V128, MATCH(I<OPCODE_STORE, VoidOp, I64<>, V128<>>)) {
} else {
e.vmovaps(e.ptr[addr], i.src2);
}
EmitMarkPageDirty(e, addr);
if (IsTracingData()) {
auto addr = ComputeMemoryAddress(e, i.src1);
e.lea(e.r8, e.ptr[addr]);
e.lea(e.rdx, e.ptr[addr]);
e.CallNative(TraceMemoryStoreV128);