nicolas/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[X86] Use Min behavior for cf-protection-{return,branch}/ibt-seal module flags

Browse Source 
These features require that all object files are compiled with the support. When
the feature is disabled for an object file, the merge behavior should treat the
file having a value of 0 (see D129911).

Reviewed By: xiangzhangllvm

Differential Revision: https://reviews.llvm.org/D130065
This commit is contained in:
Fangrui Song
2022-07-19 21:20:01 -07:00
parent e882ac54c4
commit 23ba688f02
2 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
clang/lib/CodeGen/CodeGenModule.cpp
View File

@@ -743,19 +743,19 @@ void CodeGenModule::Release() {
if (CodeGenOpts.CFProtectionReturn &&
Target.checkCFProtectionReturnSupported(getDiags())) {
// Indicate that we want to instrument return control flow protection.
getModule().addModuleFlag(llvm::Module::Override, "cf-protection-return",
getModule().addModuleFlag(llvm::Module::Min, "cf-protection-return",
1);
}
if (CodeGenOpts.CFProtectionBranch &&
Target.checkCFProtectionBranchSupported(getDiags())) {
// Indicate that we want to instrument branch control flow protection.
getModule().addModuleFlag(llvm::Module::Override, "cf-protection-branch",
getModule().addModuleFlag(llvm::Module::Min, "cf-protection-branch",
1);
}
if (CodeGenOpts.IBTSeal)
getModule().addModuleFlag(llvm::Module::Override, "ibt-seal", 1);
getModule().addModuleFlag(llvm::Module::Min, "ibt-seal", 1);
if (CodeGenOpts.FunctionReturnThunks)
getModule().addModuleFlag(llvm::Module::Override, "function_return_thunk_extern", 1);