#include "MCTargetDesc/X86BaseInfo.h"
#include "X86AsmInstrumentation.h"
#include "X86Operand.h"
-#include "X86RegisterInfo.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Triple.h"
-#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
bool IsSmallMemAccess(unsigned AccessSize) { return AccessSize < 8; }
-std::string FuncName(unsigned AccessSize, bool IsWrite) {
- return std::string("__asan_report_") + (IsWrite ? "store" : "load") +
- utostr(AccessSize);
-}
-
class X86AddressSanitizer : public X86AsmInstrumentation {
public:
struct RegisterContext {
public:
RegisterContext(unsigned AddressReg, unsigned ShadowReg,
unsigned ScratchReg) {
- BusyRegs.push_back(convReg(AddressReg, MVT::i64));
- BusyRegs.push_back(convReg(ShadowReg, MVT::i64));
- BusyRegs.push_back(convReg(ScratchReg, MVT::i64));
+ BusyRegs.push_back(convReg(AddressReg, 64));
+ BusyRegs.push_back(convReg(ShadowReg, 64));
+ BusyRegs.push_back(convReg(ScratchReg, 64));
}
- unsigned AddressReg(MVT::SimpleValueType VT) const {
- return convReg(BusyRegs[REG_OFFSET_ADDRESS], VT);
+ unsigned AddressReg(unsigned Size) const {
+ return convReg(BusyRegs[REG_OFFSET_ADDRESS], Size);
}
- unsigned ShadowReg(MVT::SimpleValueType VT) const {
- return convReg(BusyRegs[REG_OFFSET_SHADOW], VT);
+ unsigned ShadowReg(unsigned Size) const {
+ return convReg(BusyRegs[REG_OFFSET_SHADOW], Size);
}
- unsigned ScratchReg(MVT::SimpleValueType VT) const {
- return convReg(BusyRegs[REG_OFFSET_SCRATCH], VT);
+ unsigned ScratchReg(unsigned Size) const {
+ return convReg(BusyRegs[REG_OFFSET_SCRATCH], Size);
}
void AddBusyReg(unsigned Reg) {
if (Reg != X86::NoRegister)
- BusyRegs.push_back(convReg(Reg, MVT::i64));
+ BusyRegs.push_back(convReg(Reg, 64));
}
void AddBusyRegs(const X86Operand &Op) {
AddBusyReg(Op.getMemIndexReg());
}
- unsigned ChooseFrameReg(MVT::SimpleValueType VT) const {
+ unsigned ChooseFrameReg(unsigned Size) const {
static const MCPhysReg Candidates[] = { X86::RBP, X86::RAX, X86::RBX,
X86::RCX, X86::RDX, X86::RDI,
X86::RSI };
for (unsigned Reg : Candidates) {
if (!std::count(BusyRegs.begin(), BusyRegs.end(), Reg))
- return convReg(Reg, VT);
+ return convReg(Reg, Size);
}
return X86::NoRegister;
}
private:
- unsigned convReg(unsigned Reg, MVT::SimpleValueType VT) const {
- return Reg == X86::NoRegister ? Reg : getX86SubSuperRegister(Reg, VT);
+ unsigned convReg(unsigned Reg, unsigned Size) const {
+ return Reg == X86::NoRegister ? Reg : getX86SubSuperRegister(Reg, Size);
}
std::vector<unsigned> BusyRegs;
};
- X86AddressSanitizer(const MCSubtargetInfo &STI)
+ X86AddressSanitizer(const MCSubtargetInfo *&STI)
: X86AsmInstrumentation(STI), RepPrefix(false), OrigSPOffset(0) {}
~X86AddressSanitizer() override {}
protected:
void EmitLabel(MCStreamer &Out, MCSymbol *Label) { Out.EmitLabel(Label); }
- void EmitLEA(X86Operand &Op, MVT::SimpleValueType VT, unsigned Reg,
- MCStreamer &Out) {
- assert(VT == MVT::i32 || VT == MVT::i64);
+ void EmitLEA(X86Operand &Op, unsigned Size, unsigned Reg, MCStreamer &Out) {
+ assert(Size == 32 || Size == 64);
MCInst Inst;
- Inst.setOpcode(VT == MVT::i32 ? X86::LEA32r : X86::LEA64r);
- Inst.addOperand(MCOperand::createReg(getX86SubSuperRegister(Reg, VT)));
+ Inst.setOpcode(Size == 32 ? X86::LEA32r : X86::LEA64r);
+ Inst.addOperand(MCOperand::createReg(getX86SubSuperRegister(Reg, Size)));
Op.addMemOperands(Inst, 5);
EmitInstruction(Out, Inst);
}
- void ComputeMemOperandAddress(X86Operand &Op, MVT::SimpleValueType VT,
+ void ComputeMemOperandAddress(X86Operand &Op, unsigned Size,
unsigned Reg, MCContext &Ctx, MCStreamer &Out);
// Creates new memory operand with Displacement added to an original
MCContext &Ctx, int64_t *Residue);
bool is64BitMode() const {
- return STI.getFeatureBits()[X86::Mode64Bit];
+ return STI->getFeatureBits()[X86::Mode64Bit];
}
bool is32BitMode() const {
- return STI.getFeatureBits()[X86::Mode32Bit];
+ return STI->getFeatureBits()[X86::Mode32Bit];
}
bool is16BitMode() const {
- return STI.getFeatureBits()[X86::Mode16Bit];
+ return STI->getFeatureBits()[X86::Mode16Bit];
}
unsigned getPointerWidth() {
}
void X86AddressSanitizer::ComputeMemOperandAddress(X86Operand &Op,
- MVT::SimpleValueType VT,
+ unsigned Size,
unsigned Reg, MCContext &Ctx,
MCStreamer &Out) {
int64_t Displacement = 0;
// Emit Op as is.
if (Displacement == 0) {
- EmitLEA(Op, VT, Reg, Out);
+ EmitLEA(Op, Size, Reg, Out);
return;
}
int64_t Residue;
std::unique_ptr<X86Operand> NewOp =
AddDisplacement(Op, Displacement, Ctx, &Residue);
- EmitLEA(*NewOp, VT, Reg, Out);
+ EmitLEA(*NewOp, Size, Reg, Out);
while (Residue != 0) {
const MCConstantExpr *Disp =
std::unique_ptr<X86Operand> DispOp =
X86Operand::CreateMem(getPointerWidth(), 0, Disp, Reg, 0, 1, SMLoc(),
SMLoc());
- EmitLEA(*DispOp, VT, Reg, Out);
+ EmitLEA(*DispOp, Size, Reg, Out);
Residue -= Disp->getValue();
}
}
public:
static const long kShadowOffset = 0x20000000;
- X86AddressSanitizer32(const MCSubtargetInfo &STI)
+ X86AddressSanitizer32(const MCSubtargetInfo *&STI)
: X86AddressSanitizer(STI) {}
~X86AddressSanitizer32() override {}
unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
if (FrameReg == X86::NoRegister)
return FrameReg;
- return getX86SubSuperRegister(FrameReg, MVT::i32);
+ return getX86SubSuperRegister(FrameReg, 32);
}
void SpillReg(MCStreamer &Out, unsigned Reg) {
void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- unsigned LocalFrameReg = RegCtx.ChooseFrameReg(MVT::i32);
+ unsigned LocalFrameReg = RegCtx.ChooseFrameReg(32);
assert(LocalFrameReg != X86::NoRegister);
const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
MRI->getDwarfRegNum(LocalFrameReg, true /* IsEH */));
}
- SpillReg(Out, RegCtx.AddressReg(MVT::i32));
- SpillReg(Out, RegCtx.ShadowReg(MVT::i32));
- if (RegCtx.ScratchReg(MVT::i32) != X86::NoRegister)
- SpillReg(Out, RegCtx.ScratchReg(MVT::i32));
+ SpillReg(Out, RegCtx.AddressReg(32));
+ SpillReg(Out, RegCtx.ShadowReg(32));
+ if (RegCtx.ScratchReg(32) != X86::NoRegister)
+ SpillReg(Out, RegCtx.ScratchReg(32));
StoreFlags(Out);
}
void InstrumentMemOperandEpilogue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- unsigned LocalFrameReg = RegCtx.ChooseFrameReg(MVT::i32);
+ unsigned LocalFrameReg = RegCtx.ChooseFrameReg(32);
assert(LocalFrameReg != X86::NoRegister);
RestoreFlags(Out);
- if (RegCtx.ScratchReg(MVT::i32) != X86::NoRegister)
- RestoreReg(Out, RegCtx.ScratchReg(MVT::i32));
- RestoreReg(Out, RegCtx.ShadowReg(MVT::i32));
- RestoreReg(Out, RegCtx.AddressReg(MVT::i32));
+ if (RegCtx.ScratchReg(32) != X86::NoRegister)
+ RestoreReg(Out, RegCtx.ScratchReg(32));
+ RestoreReg(Out, RegCtx.ShadowReg(32));
+ RestoreReg(Out, RegCtx.AddressReg(32));
unsigned FrameReg = GetFrameReg(Ctx, Out);
if (Ctx.getRegisterInfo() && FrameReg != X86::NoRegister) {
.addReg(X86::ESP)
.addImm(-16));
EmitInstruction(
- Out, MCInstBuilder(X86::PUSH32r).addReg(RegCtx.AddressReg(MVT::i32)));
+ Out, MCInstBuilder(X86::PUSH32r).addReg(RegCtx.AddressReg(32)));
- const std::string &Fn = FuncName(AccessSize, IsWrite);
- MCSymbol *FnSym = Ctx.getOrCreateSymbol(StringRef(Fn));
+ MCSymbol *FnSym = Ctx.getOrCreateSymbol(llvm::Twine("__asan_report_") +
+ (IsWrite ? "store" : "load") +
+ llvm::Twine(AccessSize));
const MCSymbolRefExpr *FnExpr =
MCSymbolRefExpr::create(FnSym, MCSymbolRefExpr::VK_PLT, Ctx);
EmitInstruction(Out, MCInstBuilder(X86::CALLpcrel32).addExpr(FnExpr));
void X86AddressSanitizer32::InstrumentMemOperandSmall(
X86Operand &Op, unsigned AccessSize, bool IsWrite,
const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
- unsigned AddressRegI32 = RegCtx.AddressReg(MVT::i32);
- unsigned ShadowRegI32 = RegCtx.ShadowReg(MVT::i32);
- unsigned ShadowRegI8 = RegCtx.ShadowReg(MVT::i8);
+ unsigned AddressRegI32 = RegCtx.AddressReg(32);
+ unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
+ unsigned ShadowRegI8 = RegCtx.ShadowReg(8);
- assert(RegCtx.ScratchReg(MVT::i32) != X86::NoRegister);
- unsigned ScratchRegI32 = RegCtx.ScratchReg(MVT::i32);
+ assert(RegCtx.ScratchReg(32) != X86::NoRegister);
+ unsigned ScratchRegI32 = RegCtx.ScratchReg(32);
- ComputeMemOperandAddress(Op, MVT::i32, AddressRegI32, Ctx, Out);
+ ComputeMemOperandAddress(Op, 32, AddressRegI32, Ctx, Out);
EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ShadowRegI32).addReg(
AddressRegI32));
std::unique_ptr<X86Operand> Op(
X86Operand::CreateMem(getPointerWidth(), 0, Disp, ScratchRegI32, 0, 1,
SMLoc(), SMLoc()));
- EmitLEA(*Op, MVT::i32, ScratchRegI32, Out);
+ EmitLEA(*Op, 32, ScratchRegI32, Out);
break;
}
case 4:
void X86AddressSanitizer32::InstrumentMemOperandLarge(
X86Operand &Op, unsigned AccessSize, bool IsWrite,
const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
- unsigned AddressRegI32 = RegCtx.AddressReg(MVT::i32);
- unsigned ShadowRegI32 = RegCtx.ShadowReg(MVT::i32);
+ unsigned AddressRegI32 = RegCtx.AddressReg(32);
+ unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
- ComputeMemOperandAddress(Op, MVT::i32, AddressRegI32, Ctx, Out);
+ ComputeMemOperandAddress(Op, 32, AddressRegI32, Ctx, Out);
EmitInstruction(Out, MCInstBuilder(X86::MOV32rr).addReg(ShadowRegI32).addReg(
AddressRegI32));
public:
static const long kShadowOffset = 0x7fff8000;
- X86AddressSanitizer64(const MCSubtargetInfo &STI)
+ X86AddressSanitizer64(const MCSubtargetInfo *&STI)
: X86AddressSanitizer(STI) {}
~X86AddressSanitizer64() override {}
unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
if (FrameReg == X86::NoRegister)
return FrameReg;
- return getX86SubSuperRegister(FrameReg, MVT::i64);
+ return getX86SubSuperRegister(FrameReg, 64);
}
void SpillReg(MCStreamer &Out, unsigned Reg) {
void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- unsigned LocalFrameReg = RegCtx.ChooseFrameReg(MVT::i64);
+ unsigned LocalFrameReg = RegCtx.ChooseFrameReg(64);
assert(LocalFrameReg != X86::NoRegister);
const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
}
EmitAdjustRSP(Ctx, Out, -128);
- SpillReg(Out, RegCtx.ShadowReg(MVT::i64));
- SpillReg(Out, RegCtx.AddressReg(MVT::i64));
- if (RegCtx.ScratchReg(MVT::i64) != X86::NoRegister)
- SpillReg(Out, RegCtx.ScratchReg(MVT::i64));
+ SpillReg(Out, RegCtx.ShadowReg(64));
+ SpillReg(Out, RegCtx.AddressReg(64));
+ if (RegCtx.ScratchReg(64) != X86::NoRegister)
+ SpillReg(Out, RegCtx.ScratchReg(64));
StoreFlags(Out);
}
void InstrumentMemOperandEpilogue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- unsigned LocalFrameReg = RegCtx.ChooseFrameReg(MVT::i64);
+ unsigned LocalFrameReg = RegCtx.ChooseFrameReg(64);
assert(LocalFrameReg != X86::NoRegister);
RestoreFlags(Out);
- if (RegCtx.ScratchReg(MVT::i64) != X86::NoRegister)
- RestoreReg(Out, RegCtx.ScratchReg(MVT::i64));
- RestoreReg(Out, RegCtx.AddressReg(MVT::i64));
- RestoreReg(Out, RegCtx.ShadowReg(MVT::i64));
+ if (RegCtx.ScratchReg(64) != X86::NoRegister)
+ RestoreReg(Out, RegCtx.ScratchReg(64));
+ RestoreReg(Out, RegCtx.AddressReg(64));
+ RestoreReg(Out, RegCtx.ShadowReg(64));
EmitAdjustRSP(Ctx, Out, 128);
unsigned FrameReg = GetFrameReg(Ctx, Out);
MCContext &Ctx,
MCStreamer &Out) override;
void InstrumentMOVSImpl(unsigned AccessSize, MCContext &Ctx,
- MCStreamer &Out) override;
+ MCStreamer &Out) override;
private:
void EmitAdjustRSP(MCContext &Ctx, MCStreamer &Out, long Offset) {
std::unique_ptr<X86Operand> Op(
X86Operand::CreateMem(getPointerWidth(), 0, Disp, X86::RSP, 0, 1,
SMLoc(), SMLoc()));
- EmitLEA(*Op, MVT::i64, X86::RSP, Out);
+ EmitLEA(*Op, 64, X86::RSP, Out);
OrigSPOffset += Offset;
}
.addReg(X86::RSP)
.addImm(-16));
- if (RegCtx.AddressReg(MVT::i64) != X86::RDI) {
+ if (RegCtx.AddressReg(64) != X86::RDI) {
EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(X86::RDI).addReg(
- RegCtx.AddressReg(MVT::i64)));
+ RegCtx.AddressReg(64)));
}
- const std::string &Fn = FuncName(AccessSize, IsWrite);
- MCSymbol *FnSym = Ctx.getOrCreateSymbol(StringRef(Fn));
+ MCSymbol *FnSym = Ctx.getOrCreateSymbol(llvm::Twine("__asan_report_") +
+ (IsWrite ? "store" : "load") +
+ llvm::Twine(AccessSize));
const MCSymbolRefExpr *FnExpr =
MCSymbolRefExpr::create(FnSym, MCSymbolRefExpr::VK_PLT, Ctx);
EmitInstruction(Out, MCInstBuilder(X86::CALL64pcrel32).addExpr(FnExpr));
void X86AddressSanitizer64::InstrumentMemOperandSmall(
X86Operand &Op, unsigned AccessSize, bool IsWrite,
const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
- unsigned AddressRegI64 = RegCtx.AddressReg(MVT::i64);
- unsigned AddressRegI32 = RegCtx.AddressReg(MVT::i32);
- unsigned ShadowRegI64 = RegCtx.ShadowReg(MVT::i64);
- unsigned ShadowRegI32 = RegCtx.ShadowReg(MVT::i32);
- unsigned ShadowRegI8 = RegCtx.ShadowReg(MVT::i8);
+ unsigned AddressRegI64 = RegCtx.AddressReg(64);
+ unsigned AddressRegI32 = RegCtx.AddressReg(32);
+ unsigned ShadowRegI64 = RegCtx.ShadowReg(64);
+ unsigned ShadowRegI32 = RegCtx.ShadowReg(32);
+ unsigned ShadowRegI8 = RegCtx.ShadowReg(8);
- assert(RegCtx.ScratchReg(MVT::i32) != X86::NoRegister);
- unsigned ScratchRegI32 = RegCtx.ScratchReg(MVT::i32);
+ assert(RegCtx.ScratchReg(32) != X86::NoRegister);
+ unsigned ScratchRegI32 = RegCtx.ScratchReg(32);
- ComputeMemOperandAddress(Op, MVT::i64, AddressRegI64, Ctx, Out);
+ ComputeMemOperandAddress(Op, 64, AddressRegI64, Ctx, Out);
EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(ShadowRegI64).addReg(
AddressRegI64));
std::unique_ptr<X86Operand> Op(
X86Operand::CreateMem(getPointerWidth(), 0, Disp, ScratchRegI32, 0, 1,
SMLoc(), SMLoc()));
- EmitLEA(*Op, MVT::i32, ScratchRegI32, Out);
+ EmitLEA(*Op, 32, ScratchRegI32, Out);
break;
}
case 4:
void X86AddressSanitizer64::InstrumentMemOperandLarge(
X86Operand &Op, unsigned AccessSize, bool IsWrite,
const RegisterContext &RegCtx, MCContext &Ctx, MCStreamer &Out) {
- unsigned AddressRegI64 = RegCtx.AddressReg(MVT::i64);
- unsigned ShadowRegI64 = RegCtx.ShadowReg(MVT::i64);
+ unsigned AddressRegI64 = RegCtx.AddressReg(64);
+ unsigned ShadowRegI64 = RegCtx.ShadowReg(64);
- ComputeMemOperandAddress(Op, MVT::i64, AddressRegI64, Ctx, Out);
+ ComputeMemOperandAddress(Op, 64, AddressRegI64, Ctx, Out);
EmitInstruction(Out, MCInstBuilder(X86::MOV64rr).addReg(ShadowRegI64).addReg(
AddressRegI64));
} // End anonymous namespace
-X86AsmInstrumentation::X86AsmInstrumentation(const MCSubtargetInfo &STI)
+X86AsmInstrumentation::X86AsmInstrumentation(const MCSubtargetInfo *&STI)
: STI(STI), InitialFrameReg(0) {}
X86AsmInstrumentation::~X86AsmInstrumentation() {}
void X86AsmInstrumentation::EmitInstruction(MCStreamer &Out,
const MCInst &Inst) {
- Out.EmitInstruction(Inst, STI);
+ Out.EmitInstruction(Inst, *STI);
}
unsigned X86AsmInstrumentation::GetFrameRegGeneric(const MCContext &Ctx,
X86AsmInstrumentation *
CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
- const MCContext &Ctx, const MCSubtargetInfo &STI) {
- Triple T(STI.getTargetTriple());
+ const MCContext &Ctx, const MCSubtargetInfo *&STI) {
+ Triple T(STI->getTargetTriple());
const bool hasCompilerRTSupport = T.isOSLinux();
if (ClAsanInstrumentAssembly && hasCompilerRTSupport &&
MCOptions.SanitizeAddress) {
- if (STI.getFeatureBits()[X86::Mode32Bit] != 0)
+ if (STI->getFeatureBits()[X86::Mode32Bit] != 0)
return new X86AddressSanitizer32(STI);
- if (STI.getFeatureBits()[X86::Mode64Bit] != 0)
+ if (STI->getFeatureBits()[X86::Mode64Bit] != 0)
return new X86AddressSanitizer64(STI);
}
return new X86AsmInstrumentation(STI);
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