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

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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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98564 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-03-15 19:04:37 +00:00
parent a375d47137
commit 757e75b033
3 changed files with 29 additions and 46 deletions
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47
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
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
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,