X86SpeculativeExecutionSideEffectSuppression.cpp File Reference

This file contains the X86 implementation of the speculative execution side effect suppression mitigation. More...

#include "X86.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Pass.h"
#include "llvm/Target/TargetMachine.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "x86-seses"

Functions
	STATISTIC (NumLFENCEsInserted, "Number of lfence instructions inserted")
static bool	hasConstantAddressingMode (const MachineInstr &MI)
static bool	runX86SpeculativeExecutionSideEffectSuppression (MachineFunction &MF)

Detailed Description

This file contains the X86 implementation of the speculative execution side effect suppression mitigation.

This must be used with the -mlvi-cfi flag in order to mitigate indirect branches and returns.

Definition in file X86SpeculativeExecutionSideEffectSuppression.cpp.

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "x86-seses"

Definition at line 28 of file X86SpeculativeExecutionSideEffectSuppression.cpp.

Function Documentation

hasConstantAddressingMode()

bool hasConstantAddressingMode ( const MachineInstr & MI )

static

Definition at line 58 of file X86SpeculativeExecutionSideEffectSuppression.cpp.

References MI.

Referenced by runX86SpeculativeExecutionSideEffectSuppression().

runX86SpeculativeExecutionSideEffectSuppression()

bool runX86SpeculativeExecutionSideEffectSuppression ( MachineFunction & MF )

static

Definition at line 66 of file X86SpeculativeExecutionSideEffectSuppression.cpp.

References assert(), llvm::BuildMI(), llvm::dbgs(), llvm::dwarf_linker::DebugLoc, llvm::X86Subtarget::getCLOpts(), llvm::X86Subtarget::getInstrInfo(), llvm::MachineFunction::getName(), llvm::TargetMachine::getOptLevel(), llvm::MachineFunction::getSubtarget(), llvm::MachineFunction::getTarget(), hasConstantAddressingMode(), LLVM_DEBUG, MBB, MI, Modified, llvm::None, and TII.

Referenced by llvm::X86SpeculativeExecutionSideEffectSuppressionPass::run().

STATISTIC()

STATISTIC	(	NumLFENCEsInserted	,
		"Number of lfence instructions inserted"	)