PR16493: DebugInfo with TLS on PPC crashing due to invalid relocation

Restrict the current TLS support to X86 ELF for now. Test that we don't
produce it on PPC & we can flesh that test case out with the right thing
once someone implements it.

llvm-svn: 185389

2 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.cpp b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
index 871dacd6a1c..a00e8d4f4dd 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.cpp
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.cpp
@@ -47,3 +47,9 @@ X86LinuxTargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &TM) {
   TargetLoweringObjectFileELF::Initialize(Ctx, TM);
   InitializeELF(TM.Options.UseInitArray);
 }
+
+const MCSymbolRefExpr *
+X86LinuxTargetObjectFile::getDebugThreadLocalSymbol(
+    const MCSymbol *Sym) const {
+  return MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_DTPOFF, getContext());
+}
diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.h b/llvm/lib/Target/X86/X86TargetObjectFile.h
index 9d26d389d4d..7baedd2ddfd 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.h
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.h
@@ -36,6 +36,9 @@ namespace llvm {
   /// and x86-64.
   class X86LinuxTargetObjectFile : public TargetLoweringObjectFileELF {
     virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
+
+    /// \brief Describe a TLS variable address within debug info.
+    virtual const MCSymbolRefExpr *getDebugThreadLocalSymbol(const MCSymbol *Sym) const;
   };
 
 } // end namespace llvm