diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86.td')
| -rw-r--r-- | llvm/lib/Target/X86/X86.td | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86.td b/llvm/lib/Target/X86/X86.td index a2b11d55f65..edc47482576 100644 --- a/llvm/lib/Target/X86/X86.td +++ b/llvm/lib/Target/X86/X86.td @@ -426,6 +426,15 @@ def FeatureRetpolineExternalThunk "ourselves. Only has effect when combined with some other retpoline " "feature", [FeatureRetpolineIndirectCalls]>; +// Mitigate LVI attacks against indirect calls/branches and call returns +def FeatureLVIControlFlowIntegrity + : SubtargetFeature< + "lvi-cfi", "UseLVIControlFlowIntegrity", "true", + "Prevent indirect calls/branches from using a memory operand, and " + "precede all indirect calls/branches from a register with an " + "LFENCE instruction to serialize control flow. Also decompose RET " + "instructions into a POP+LFENCE+JMP sequence.">; + // Direct Move instructions. def FeatureMOVDIRI : SubtargetFeature<"movdiri", "HasMOVDIRI", "true", "Support movdiri instruction">; |
