[PATCH] D113443: [FreeBSD] avoid marking __stack_chk_guard symbol as dso_local on PPC64
Alfredo Dal'Ava JĂșnior via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Feb 6 11:23:31 PST 2023
adalava updated this revision to Diff 495220.
adalava added a comment.
Update comments
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D113443/new/
https://reviews.llvm.org/D113443
Files:
llvm/lib/CodeGen/TargetLoweringBase.cpp
Index: llvm/lib/CodeGen/TargetLoweringBase.cpp
===================================================================
--- llvm/lib/CodeGen/TargetLoweringBase.cpp
+++ llvm/lib/CodeGen/TargetLoweringBase.cpp
@@ -1964,10 +1964,14 @@
GlobalVariable::ExternalLinkage, nullptr,
"__stack_chk_guard");
- // FreeBSD has "__stack_chk_guard" defined externally on libc.so
+ // XXX this is a workaround for FreeBSD PPC64 stack protector codegen and
+ // requires more investigation. For unknown reasons set dso_local here
+ // breaks PPC64 userland binaries (see bug #51590).
+ // However, FreeBSD amd64 kernel and modules are broken if dso_local
+ // is not set here, while PCC64 kernel and modules are fine without it.
if (TM.getRelocationModel() == Reloc::Static &&
!TM.getTargetTriple().isWindowsGNUEnvironment() &&
- !TM.getTargetTriple().isOSFreeBSD())
+ !(TM.getTargetTriple().isPPC64() && TM.getTargetTriple().isOSFreeBSD()))
GV->setDSOLocal(true);
}
}
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