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SparcELFObjectWriter.cpp
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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/SparcFixupKinds.h"
#include "MCTargetDesc/SparcMCExpr.h"
#include "MCTargetDesc/SparcMCTargetDesc.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) {}
~SparcELFObjectWriter() override {}
protected:
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
const MCFixup &Fixup, bool IsPCRel) const override;
bool needsRelocateWithSymbol(const MCSymbol &Sym,
unsigned Type) const override;
};
}
unsigned SparcELFObjectWriter::getRelocType(MCContext &Ctx,
const MCValue &Target,
const MCFixup &Fixup,
bool IsPCRel) const {
if (const SparcMCExpr *SExpr = dyn_cast<SparcMCExpr>(Fixup.getValue())) {
if (SExpr->getKind() == SparcMCExpr::VK_Sparc_R_DISP32)
return ELF::R_SPARC_DISP32;
}
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;
case Sparc::fixup_sparc_pc22: return ELF::R_SPARC_PC22;
case Sparc::fixup_sparc_pc10: return ELF::R_SPARC_PC10;
case Sparc::fixup_sparc_wplt30: return ELF::R_SPARC_WPLT30;
}
}
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;
case Sparc::fixup_sparc_got22: return ELF::R_SPARC_GOT22;
case Sparc::fixup_sparc_got10: return ELF::R_SPARC_GOT10;
case Sparc::fixup_sparc_tls_gd_hi22: return ELF::R_SPARC_TLS_GD_HI22;
case Sparc::fixup_sparc_tls_gd_lo10: return ELF::R_SPARC_TLS_GD_LO10;
case Sparc::fixup_sparc_tls_gd_add: return ELF::R_SPARC_TLS_GD_ADD;
case Sparc::fixup_sparc_tls_gd_call: return ELF::R_SPARC_TLS_GD_CALL;
case Sparc::fixup_sparc_tls_ldm_hi22: return ELF::R_SPARC_TLS_LDM_HI22;
case Sparc::fixup_sparc_tls_ldm_lo10: return ELF::R_SPARC_TLS_LDM_LO10;
case Sparc::fixup_sparc_tls_ldm_add: return ELF::R_SPARC_TLS_LDM_ADD;
case Sparc::fixup_sparc_tls_ldm_call: return ELF::R_SPARC_TLS_LDM_CALL;
case Sparc::fixup_sparc_tls_ldo_hix22: return ELF::R_SPARC_TLS_LDO_HIX22;
case Sparc::fixup_sparc_tls_ldo_lox10: return ELF::R_SPARC_TLS_LDO_LOX10;
case Sparc::fixup_sparc_tls_ldo_add: return ELF::R_SPARC_TLS_LDO_ADD;
case Sparc::fixup_sparc_tls_ie_hi22: return ELF::R_SPARC_TLS_IE_HI22;
case Sparc::fixup_sparc_tls_ie_lo10: return ELF::R_SPARC_TLS_IE_LO10;
case Sparc::fixup_sparc_tls_ie_ld: return ELF::R_SPARC_TLS_IE_LD;
case Sparc::fixup_sparc_tls_ie_ldx: return ELF::R_SPARC_TLS_IE_LDX;
case Sparc::fixup_sparc_tls_ie_add: return ELF::R_SPARC_TLS_IE_ADD;
case Sparc::fixup_sparc_tls_le_hix22: return ELF::R_SPARC_TLS_LE_HIX22;
case Sparc::fixup_sparc_tls_le_lox10: return ELF::R_SPARC_TLS_LE_LOX10;
}
return ELF::R_SPARC_NONE;
}
bool SparcELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &Sym,
unsigned Type) const {
switch (Type) {
default:
return false;
// All relocations that use a GOT need a symbol, not an offset, as
// the offset of the symbol within the section is irrelevant to
// where the GOT entry is. Don't need to list all the TLS entries,
// as they're all marked as requiring a symbol anyways.
case ELF::R_SPARC_GOT10:
case ELF::R_SPARC_GOT13:
case ELF::R_SPARC_GOT22:
case ELF::R_SPARC_GOTDATA_HIX22:
case ELF::R_SPARC_GOTDATA_LOX10:
case ELF::R_SPARC_GOTDATA_OP_HIX22:
case ELF::R_SPARC_GOTDATA_OP_LOX10:
return true;
}
}
MCObjectWriter *llvm::createSparcELFObjectWriter(raw_pwrite_stream &OS,
bool Is64Bit,
bool IsLittleEndian,
uint8_t OSABI) {
MCELFObjectTargetWriter *MOTW = new SparcELFObjectWriter(Is64Bit, OSABI);
return createELFObjectWriter(MOTW, OS, IsLittleEndian);
}