Disable LOAD_STACK_GUARD on OpenBSD/armv7. It seems the implementation

is incomplete resulting in SIGSEGV with the OpenBSD default options.

ok deraadt@, jsg@

diff --git a/gnu/llvm/llvm/lib/Target/ARM/ARMISelLowering.cpp b/gnu/llvm/llvm/lib/Target/ARM/ARMISelLowering.cpp
index 2e78b52..200d450 100644 (file)
--- a/gnu/llvm/llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ b/gnu/llvm/llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -21198,6 +21198,8 @@ bool ARMTargetLowering::shouldInsertFencesForAtomic(
 }
 
 bool ARMTargetLowering::useLoadStackGuardNode() const {
+  if (Subtarget->getTargetTriple().isOSOpenBSD())
+    return false;
   // ROPI/RWPI are not supported currently.
   return !Subtarget->isROPI() && !Subtarget->isRWPI();
 }