forked from OSchip/llvm-project
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
//===-- MipsELFWriterInfo.cpp - ELF Writer Info for the Mips backend ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements ELF writer information for the Mips backend.
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//
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//===----------------------------------------------------------------------===//
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#include "MipsELFWriterInfo.h"
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#include "MipsRelocations.h"
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#include "llvm/Function.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/ELF.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Implementation of the MipsELFWriterInfo class
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//===----------------------------------------------------------------------===//
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MipsELFWriterInfo::MipsELFWriterInfo(bool is64Bit_, bool isLittleEndian_)
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: TargetELFWriterInfo(is64Bit_, isLittleEndian_) {
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EMachine = EM_MIPS;
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}
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MipsELFWriterInfo::~MipsELFWriterInfo() {}
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unsigned MipsELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
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switch(MachineRelTy) {
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case Mips::reloc_mips_pc16:
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return ELF::R_MIPS_GOT16;
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case Mips::reloc_mips_hi:
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return ELF::R_MIPS_HI16;
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case Mips::reloc_mips_lo:
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return ELF::R_MIPS_LO16;
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case Mips::reloc_mips_26:
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return ELF::R_MIPS_26;
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default:
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llvm_unreachable("unknown Mips machine relocation type");
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}
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}
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long int MipsELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
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long int Modifier) const {
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switch(RelTy) {
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case ELF::R_MIPS_26: return Modifier;
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default:
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llvm_unreachable("unknown Mips relocation type");
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}
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}
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unsigned MipsELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
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switch(RelTy) {
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case ELF::R_MIPS_GOT16:
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case ELF::R_MIPS_26:
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return 32;
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default:
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llvm_unreachable("unknown Mips relocation type");
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}
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}
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bool MipsELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
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switch(RelTy) {
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case ELF::R_MIPS_GOT16:
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return true;
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case ELF::R_MIPS_26:
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return false;
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default:
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llvm_unreachable("unknown Mips relocation type");
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}
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}
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unsigned MipsELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
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return Mips::reloc_mips_26;
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}
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long int MipsELFWriterInfo::computeRelocation(unsigned SymOffset,
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unsigned RelOffset,
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unsigned RelTy) const {
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if (RelTy == ELF::R_MIPS_GOT16)
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return SymOffset - (RelOffset + 4);
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llvm_unreachable("computeRelocation unknown for this relocation type");
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}
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