#include "llvm/ADT/Triple.h"
#include "llvm/CodeGen/MachineValueType.h"
#include "llvm/IR/Function.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
virtual ~X86AddressSanitizer32() {}
+ unsigned GetFrameReg(const MCContext &Ctx, MCStreamer &Out) {
+ unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
+ if (FrameReg == X86::NoRegister)
+ return FrameReg;
+ return getX86SubSuperRegister(FrameReg, MVT::i32);
+ }
+
virtual void StoreFlags(MCStreamer &Out) override {
EmitInstruction(Out, MCInstBuilder(X86::PUSHF32));
}
virtual void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- const MCRegisterInfo* MRI = Ctx.getRegisterInfo();
+ const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
+ unsigned FrameReg = GetFrameReg(Ctx, Out);
if (MRI && FrameReg != X86::NoRegister) {
EmitInstruction(
Out, MCInstBuilder(X86::PUSH32r).addReg(X86::EBP));
EmitInstruction(
Out, MCInstBuilder(X86::POP32r).addReg(RegCtx.addressReg(MVT::i32)));
+ unsigned FrameReg = GetFrameReg(Ctx, Out);
if (Ctx.getRegisterInfo() && FrameReg != X86::NoRegister) {
EmitInstruction(
Out, MCInstBuilder(X86::POP32r).addReg(X86::EBP));
virtual ~X86AddressSanitizer64() {}
+ unsigned GetFrameReg(const MCContext &Ctx, MCStreamer &Out) {
+ unsigned FrameReg = GetFrameRegGeneric(Ctx, Out);
+ if (FrameReg == X86::NoRegister)
+ return FrameReg;
+ return getX86SubSuperRegister(FrameReg, MVT::i64);
+ }
+
virtual void StoreFlags(MCStreamer &Out) override {
EmitInstruction(Out, MCInstBuilder(X86::PUSHF64));
}
virtual void InstrumentMemOperandPrologue(const RegisterContext &RegCtx,
MCContext &Ctx,
MCStreamer &Out) override {
- const MCRegisterInfo *RegisterInfo = Ctx.getRegisterInfo();
- if (RegisterInfo && FrameReg != X86::NoRegister) {
+ const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
+ unsigned FrameReg = GetFrameReg(Ctx, Out);
+ if (MRI && FrameReg != X86::NoRegister) {
EmitInstruction(Out, MCInstBuilder(X86::PUSH64r).addReg(X86::RBP));
if (FrameReg == X86::RSP) {
Out.EmitCFIAdjustCfaOffset(8 /* byte size of the FrameReg */);
Out.EmitCFIRelOffset(
- RegisterInfo->getDwarfRegNum(X86::RBP, true /* IsEH */), 0);
+ MRI->getDwarfRegNum(X86::RBP, true /* IsEH */), 0);
}
EmitInstruction(
Out, MCInstBuilder(X86::MOV64rr).addReg(X86::RBP).addReg(FrameReg));
Out.EmitCFIRememberState();
Out.EmitCFIDefCfaRegister(
- RegisterInfo->getDwarfRegNum(X86::RBP, true /* IsEH */));
+ MRI->getDwarfRegNum(X86::RBP, true /* IsEH */));
}
EmitAdjustRSP(Ctx, Out, -128);
Out, MCInstBuilder(X86::POP64r).addReg(RegCtx.shadowReg(MVT::i64)));
EmitAdjustRSP(Ctx, Out, 128);
+ unsigned FrameReg = GetFrameReg(Ctx, Out);
if (Ctx.getRegisterInfo() && FrameReg != X86::NoRegister) {
EmitInstruction(
Out, MCInstBuilder(X86::POP64r).addReg(X86::RBP));
} // End anonymous namespace
X86AsmInstrumentation::X86AsmInstrumentation(const MCSubtargetInfo &STI)
- : STI(STI), FrameReg(X86::NoRegister) {}
+ : STI(STI), InitialFrameReg(0) {}
X86AsmInstrumentation::~X86AsmInstrumentation() {}
Out.EmitInstruction(Inst, STI);
}
+unsigned X86AsmInstrumentation::GetFrameRegGeneric(const MCContext &Ctx,
+ MCStreamer &Out) {
+ if (!Out.getNumFrameInfos()) // No active dwarf frame
+ return X86::NoRegister;
+ const MCDwarfFrameInfo &Frame = Out.getDwarfFrameInfos().back();
+ if (Frame.End) // Active dwarf frame is closed
+ return X86::NoRegister;
+ const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
+ if (!MRI) // No register info
+ return X86::NoRegister;
+
+ if (InitialFrameReg) {
+ // FrameReg is set explicitly, we're instrumenting a MachineFunction.
+ return InitialFrameReg;
+ }
+
+ return MRI->getLLVMRegNum(Frame.CurrentCfaRegister, true /* IsEH */);
+}
+
X86AsmInstrumentation *
CreateX86AsmInstrumentation(const MCTargetOptions &MCOptions,
const MCContext &Ctx, const MCSubtargetInfo &STI) {