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Place the LSDA into the TEXT section for x86 Darwin. If the global it's pointing 

to is local to the translation unit, we need to place fill the value of that
symbol into the non-lazy pointer.

This should conclude all Darwin changes for placing the LSDA into the TEXT
section. There is some cleanup to do. I.e., there's no longer a special need for
target-specific code here. But that can come later.

llvm-svn: 98564
This commit is contained in:
Bill Wendling 2010-03-15 19:04:37 +00:00
parent ae5edee6c8
commit 0344874921
3 changed files with 29 additions and 46 deletions
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47
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -70,53 +70,14 @@ Disable16Bit("disable-16bit", cl::Hidden,
static SDValue getMOVL(SelectionDAG &DAG, DebugLoc dl, EVT VT, SDValue V1,
SDValue V2);
// FIXME: This is for a test.
static cl::opt<bool>
EnableX86EHTest("enable-x86-eh-test", cl::Hidden);
namespace llvm {
class X86_test_MachoTargetObjectFile : public TargetLoweringObjectFileMachO {
public:
virtual void Initialize(MCContext &Ctx, const TargetMachine &TM) {
TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
// Exception Handling.
LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
SectionKind::getReadOnlyWithRel());
}
virtual unsigned getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
};
class X8664_test_MachoTargetObjectFile : public X8664_MachoTargetObjectFile {
public:
virtual void Initialize(MCContext &Ctx, const TargetMachine &TM) {
TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
// Exception Handling.
LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
SectionKind::getReadOnlyWithRel());
}
virtual unsigned getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
};
}
static TargetLoweringObjectFile *createTLOF(X86TargetMachine &TM) {
switch (TM.getSubtarget<X86Subtarget>().TargetType) {
default: llvm_unreachable("unknown subtarget type");
case X86Subtarget::isDarwin:
// FIXME: This is for an EH test.
if (EnableX86EHTest) {
if (TM.getSubtarget<X86Subtarget>().is64Bit())
return new X8664_test_MachoTargetObjectFile();
else
return new X86_test_MachoTargetObjectFile();
}
if (TM.getSubtarget<X86Subtarget>().is64Bit())
return new X8664_MachoTargetObjectFile();
else
return new X86_MachoTargetObjectFile();
if (TM.getSubtarget<X86Subtarget>().is64Bit())
return new X8664_MachoTargetObjectFile();

14
llvm/lib/Target/X86/X86TargetObjectFile.cpp
View File

@ -12,12 +12,26 @@
#include "X86TargetMachine.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/Target/Mangler.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Dwarf.h"
using namespace llvm;
using namespace dwarf;
void X86_MachoTargetObjectFile::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
TargetLoweringObjectFileMachO::Initialize(Ctx, TM);
// Exception Handling.
LSDASection = getMachOSection("__TEXT", "__gcc_except_tab", 0,
SectionKind::getReadOnlyWithRel());
}
unsigned X86_MachoTargetObjectFile::getTTypeEncoding() const {
return DW_EH_PE_indirect | DW_EH_PE_pcrel | DW_EH_PE_sdata4;
}
const MCExpr *X8664_MachoTargetObjectFile::
getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,

14
llvm/lib/Target/X86/X86TargetObjectFile.h
View File

@ -17,11 +17,19 @@
namespace llvm {
class X86TargetMachine;
/// X8664_MachoTargetObjectFile - This TLOF implementation is used for
/// Darwin/x86-64.
class X8664_MachoTargetObjectFile : public TargetLoweringObjectFileMachO {
/// X86_MachoTargetObjectFile - This TLOF implementation is used for Darwin
/// x86 variants.
class X86_MachoTargetObjectFile : public TargetLoweringObjectFileMachO {
public:
virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
virtual unsigned getTTypeEncoding() const;
};
/// X8664_MachoTargetObjectFile - This TLOF implementation is used for Darwin
/// x86-64.
class X8664_MachoTargetObjectFile : public X86_MachoTargetObjectFile {
public:
virtual const MCExpr *
getExprForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang,
MachineModuleInfo *MMI, unsigned Encoding,