Big change #1 for personality function references:
Eliminate the PersonalityPrefix/Suffix & NeedsIndirectEncoding
fields from MAI: they aren't part of the asm syntax, they are
related to the structure of the object file.
To replace their functionality, add a new
TLOF::getSymbolForDwarfGlobalReference method which asks targets
to decide how to reference a global from EH in a pc-relative way.
The default implementation just returns the symbol. The default
darwin implementation references the symbol through an indirect
$non_lazy_ptr stub. The bizarro x86-64 darwin specialization
handles the weird "foo@GOTPCREL+4" hack.
DwarfException.cpp now uses this to emit the reference to the
symbol in the right way, and this also eliminates another
horrible hack from DwarfException.cpp:
- if (strcmp(MAI->getPersonalitySuffix(), "+4@GOTPCREL"))
- O << "-" << MAI->getPCSymbol();
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81991 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86TargetObjectFile.cpp b/lib/Target/X86/X86TargetObjectFile.cpp
new file mode 100644
index 0000000..ce0b8bf
--- /dev/null
+++ b/lib/Target/X86/X86TargetObjectFile.cpp
@@ -0,0 +1,33 @@
+//===-- llvm/Target/X86/X86TargetObjectFile.cpp - X86 Object Info ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "X86TargetObjectFile.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/Mangler.h"
+#include "llvm/MC/MCExpr.h"
+using namespace llvm;
+
+const MCExpr *X8664_MachoTargetObjectFile::
+getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
+ bool &IsIndirect, bool &IsPCRel) const {
+
+ // On Darwin/X86-64, we can reference dwarf symbols with foo@GOTPCREL+4, which
+ // is an indirect pc-relative reference.
+ IsIndirect = true;
+ IsPCRel = true;
+
+ SmallString<128> Name;
+ Mang->getNameWithPrefix(Name, GV, false);
+ Name += "@GOTPCREL";
+ const MCExpr *Res =
+ MCSymbolRefExpr::Create(Name.str(), getContext());
+ const MCExpr *Four = MCConstantExpr::Create(4, getContext());
+ return MCBinaryExpr::CreateAdd(Res, Four, getContext());
+}
+