mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 20:29:48 +00:00
38b362617c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198763 91177308-0d34-0410-b5e6-96231b3b80d8
271 lines
8.2 KiB
C++
271 lines
8.2 KiB
C++
//===-- X86ELFObjectWriter.cpp - X86 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/X86FixupKinds.h"
|
|
#include "MCTargetDesc/X86MCTargetDesc.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Support/ELF.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class X86ELFObjectWriter : public MCELFObjectTargetWriter {
|
|
public:
|
|
X86ELFObjectWriter(bool IsELF64, uint8_t OSABI, uint16_t EMachine);
|
|
|
|
virtual ~X86ELFObjectWriter();
|
|
protected:
|
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
|
bool IsPCRel, bool IsRelocWithSymbol,
|
|
int64_t Addend) const;
|
|
};
|
|
}
|
|
|
|
X86ELFObjectWriter::X86ELFObjectWriter(bool IsELF64, uint8_t OSABI,
|
|
uint16_t EMachine)
|
|
: MCELFObjectTargetWriter(IsELF64, OSABI, EMachine,
|
|
// Only i386 uses Rel instead of RelA.
|
|
/*HasRelocationAddend*/ EMachine != ELF::EM_386) {}
|
|
|
|
X86ELFObjectWriter::~X86ELFObjectWriter()
|
|
{}
|
|
|
|
unsigned X86ELFObjectWriter::GetRelocType(const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel,
|
|
bool IsRelocWithSymbol,
|
|
int64_t Addend) const {
|
|
// determine the type of the relocation
|
|
|
|
MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
|
|
MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
|
|
unsigned Type;
|
|
if (getEMachine() == ELF::EM_X86_64) {
|
|
if (IsPCRel) {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("invalid fixup kind!");
|
|
|
|
case FK_Data_8: Type = ELF::R_X86_64_PC64; break;
|
|
case FK_Data_4: Type = ELF::R_X86_64_PC32; break;
|
|
case FK_Data_2: Type = ELF::R_X86_64_PC16; break;
|
|
case FK_Data_1: Type = ELF::R_X86_64_PC8; break;
|
|
|
|
case FK_PCRel_8:
|
|
assert(Modifier == MCSymbolRefExpr::VK_None);
|
|
Type = ELF::R_X86_64_PC64;
|
|
break;
|
|
case X86::reloc_signed_4byte:
|
|
case X86::reloc_riprel_4byte_movq_load:
|
|
case X86::reloc_riprel_4byte:
|
|
case FK_PCRel_4:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_X86_64_PC32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_PLT:
|
|
Type = ELF::R_X86_64_PLT32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTPCREL:
|
|
Type = ELF::R_X86_64_GOTPCREL;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTTPOFF:
|
|
Type = ELF::R_X86_64_GOTTPOFF;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TLSGD:
|
|
Type = ELF::R_X86_64_TLSGD;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TLSLD:
|
|
Type = ELF::R_X86_64_TLSLD;
|
|
break;
|
|
}
|
|
break;
|
|
case FK_PCRel_2:
|
|
assert(Modifier == MCSymbolRefExpr::VK_None);
|
|
Type = ELF::R_X86_64_PC16;
|
|
break;
|
|
case FK_PCRel_1:
|
|
assert(Modifier == MCSymbolRefExpr::VK_None);
|
|
Type = ELF::R_X86_64_PC8;
|
|
break;
|
|
}
|
|
} else {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("invalid fixup kind!");
|
|
case FK_Data_8:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_X86_64_64;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOT:
|
|
Type = ELF::R_X86_64_GOT64;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTOFF:
|
|
Type = ELF::R_X86_64_GOTOFF64;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TPOFF:
|
|
Type = ELF::R_X86_64_TPOFF64;
|
|
break;
|
|
case MCSymbolRefExpr::VK_DTPOFF:
|
|
Type = ELF::R_X86_64_DTPOFF64;
|
|
break;
|
|
}
|
|
break;
|
|
case X86::reloc_signed_4byte:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_X86_64_32S;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOT:
|
|
Type = ELF::R_X86_64_GOT32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTPCREL:
|
|
Type = ELF::R_X86_64_GOTPCREL;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TPOFF:
|
|
Type = ELF::R_X86_64_TPOFF32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_DTPOFF:
|
|
Type = ELF::R_X86_64_DTPOFF32;
|
|
break;
|
|
}
|
|
break;
|
|
case FK_Data_4:
|
|
Type = ELF::R_X86_64_32;
|
|
break;
|
|
case FK_Data_2: Type = ELF::R_X86_64_16; break;
|
|
case FK_PCRel_1:
|
|
case FK_Data_1: Type = ELF::R_X86_64_8; break;
|
|
}
|
|
}
|
|
} else if (getEMachine() == ELF::EM_386) {
|
|
if (IsPCRel) {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("invalid fixup kind!");
|
|
|
|
case X86::reloc_global_offset_table:
|
|
Type = ELF::R_386_GOTPC;
|
|
break;
|
|
|
|
case FK_PCRel_1:
|
|
case FK_Data_1:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_386_PC8;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case FK_PCRel_2:
|
|
case FK_Data_2:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_386_PC16;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case X86::reloc_signed_4byte:
|
|
case FK_PCRel_4:
|
|
case FK_Data_4:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_386_PC32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_PLT:
|
|
Type = ELF::R_386_PLT32;
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("invalid fixup kind!");
|
|
|
|
case X86::reloc_global_offset_table:
|
|
Type = ELF::R_386_GOTPC;
|
|
break;
|
|
|
|
// FIXME: Should we avoid selecting reloc_signed_4byte in 32 bit mode
|
|
// instead?
|
|
case X86::reloc_signed_4byte:
|
|
case FK_PCRel_4:
|
|
case FK_Data_4:
|
|
switch (Modifier) {
|
|
default:
|
|
llvm_unreachable("Unimplemented");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_386_32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOT:
|
|
Type = ELF::R_386_GOT32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTOFF:
|
|
Type = ELF::R_386_GOTOFF;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TLSGD:
|
|
Type = ELF::R_386_TLS_GD;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TPOFF:
|
|
Type = ELF::R_386_TLS_LE_32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_INDNTPOFF:
|
|
Type = ELF::R_386_TLS_IE;
|
|
break;
|
|
case MCSymbolRefExpr::VK_NTPOFF:
|
|
Type = ELF::R_386_TLS_LE;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTNTPOFF:
|
|
Type = ELF::R_386_TLS_GOTIE;
|
|
break;
|
|
case MCSymbolRefExpr::VK_TLSLDM:
|
|
Type = ELF::R_386_TLS_LDM;
|
|
break;
|
|
case MCSymbolRefExpr::VK_DTPOFF:
|
|
Type = ELF::R_386_TLS_LDO_32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_GOTTPOFF:
|
|
Type = ELF::R_386_TLS_IE_32;
|
|
break;
|
|
}
|
|
break;
|
|
case FK_Data_2: Type = ELF::R_386_16; break;
|
|
case FK_PCRel_1:
|
|
case FK_Data_1: Type = ELF::R_386_8; break;
|
|
}
|
|
}
|
|
} else
|
|
llvm_unreachable("Unsupported ELF machine type.");
|
|
|
|
return Type;
|
|
}
|
|
|
|
MCObjectWriter *llvm::createX86ELFObjectWriter(raw_ostream &OS,
|
|
bool IsELF64,
|
|
uint8_t OSABI,
|
|
uint16_t EMachine) {
|
|
MCELFObjectTargetWriter *MOTW =
|
|
new X86ELFObjectWriter(IsELF64, OSABI, EMachine);
|
|
return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/true);
|
|
}
|