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[Sparc] Add ELF Object Writer for Sparc.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198580 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju
2014-01-06 01:22:54 +00:00
parent 4644d79871
commit 8cba6039da
8 changed files with 287 additions and 12 deletions
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86
lib/Target/Sparc/MCTargetDesc/SparcELFObjectWriter.cpp Normal file
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//===-- SparcELFObjectWriter.cpp - Sparc ELF Writer -----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/SparcMCTargetDesc.h"
#include "MCTargetDesc/SparcFixupKinds.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
namespace {
class SparcELFObjectWriter : public MCELFObjectTargetWriter {
public:
SparcELFObjectWriter(bool Is64Bit, uint8_t OSABI)
: MCELFObjectTargetWriter(Is64Bit, OSABI,
Is64Bit ? ELF::EM_SPARCV9 : ELF::EM_SPARC,
/*HasRelocationAddend*/ true) {}
virtual ~SparcELFObjectWriter() {}
protected:
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
bool IsPCRel, bool IsRelocWithSymbol,
int64_t Addend) const;
};
}
unsigned SparcELFObjectWriter::GetRelocType(const MCValue &Target,
const MCFixup &Fixup,
bool IsPCRel,
bool IsRelocWithSymbol,
int64_t Addend) const {
if (IsPCRel) {
switch((unsigned)Fixup.getKind()) {
default:
llvm_unreachable("Unimplemented fixup -> relocation");
case FK_Data_1: return ELF::R_SPARC_DISP8;
case FK_Data_2: return ELF::R_SPARC_DISP16;
case FK_Data_4: return ELF::R_SPARC_DISP32;
case FK_Data_8: return ELF::R_SPARC_DISP64;
case Sparc::fixup_sparc_call30: return ELF::R_SPARC_WDISP30;
case Sparc::fixup_sparc_br22: return ELF::R_SPARC_WDISP22;
case Sparc::fixup_sparc_br19: return ELF::R_SPARC_WDISP19;
}
}
switch((unsigned)Fixup.getKind()) {
default:
llvm_unreachable("Unimplemented fixup -> relocation");
case FK_Data_1: return ELF::R_SPARC_8;
case FK_Data_2: return ((Fixup.getOffset() % 2)
? ELF::R_SPARC_UA16
: ELF::R_SPARC_16);
case FK_Data_4: return ((Fixup.getOffset() % 4)
? ELF::R_SPARC_UA32
: ELF::R_SPARC_32);
case FK_Data_8: return ((Fixup.getOffset() % 8)
? ELF::R_SPARC_UA64
: ELF::R_SPARC_64);
case Sparc::fixup_sparc_hi22: return ELF::R_SPARC_HI22;
case Sparc::fixup_sparc_lo10: return ELF::R_SPARC_LO10;
case Sparc::fixup_sparc_h44: return ELF::R_SPARC_H44;
case Sparc::fixup_sparc_m44: return ELF::R_SPARC_M44;
case Sparc::fixup_sparc_l44: return ELF::R_SPARC_L44;
case Sparc::fixup_sparc_hh: return ELF::R_SPARC_HH22;
case Sparc::fixup_sparc_hm: return ELF::R_SPARC_HM10;
}
return ELF::R_SPARC_NONE;
}
MCObjectWriter *llvm::createSparcELFObjectWriter(raw_ostream &OS,
bool Is64Bit,
uint8_t OSABI) {
MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI);
return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
}