Add the ShadowCallStack pass
Summary:
The ShadowCallStack pass instruments functions marked with the
shadowcallstack attribute. The instrumented prolog saves the return
address to [gs:offset] where offset is stored and updated in [gs:0].
The instrumented epilog loads/updates the return address from [gs:0]
and checks that it matches the return address on the stack before
returning.
Reviewers: pcc, vitalybuka
Reviewed By: pcc
Subscribers: cryptoad, eugenis, craig.topper, mgorny, llvm-commits, kcc
Differential Revision: https://reviews.llvm.org/D44802
llvm-svn: 329139
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index c932075..fe901fc 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -58,6 +58,7 @@
void initializeWinEHStatePassPass(PassRegistry &);
void initializeFixupLEAPassPass(PassRegistry &);
+void initializeShadowCallStackPass(PassRegistry &);
void initializeX86CallFrameOptimizationPass(PassRegistry &);
void initializeX86CmovConverterPassPass(PassRegistry &);
void initializeX86ExecutionDomainFixPass(PassRegistry &);
@@ -77,6 +78,7 @@
initializeFixupBWInstPassPass(PR);
initializeEvexToVexInstPassPass(PR);
initializeFixupLEAPassPass(PR);
+ initializeShadowCallStackPass(PR);
initializeX86CallFrameOptimizationPass(PR);
initializeX86CmovConverterPassPass(PR);
initializeX86ExecutionDomainFixPass(PR);
@@ -473,6 +475,7 @@
addPass(createBreakFalseDeps());
}
+ addPass(createShadowCallStackPass());
addPass(createX86IndirectBranchTrackingPass());
if (UseVZeroUpper)