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Add definition of class MipsELFWriterInfo.

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Patch by Jack Carter and Reed Kotler at Mips. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141937 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2011-10-14 02:55:47 +00:00
parent 51f72c5a3f
commit 2891662cc2
3 changed files with 276 additions and 0 deletions
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1
lib/Target/Mips/CMakeLists.txt
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@@ -12,6 +12,7 @@ add_llvm_target(MipsCodeGen
MipsAsmPrinter.cpp MipsAsmPrinter.cpp
MipsCodeEmitter.cpp MipsCodeEmitter.cpp
MipsDelaySlotFiller.cpp MipsDelaySlotFiller.cpp
MipsELFWriterInfo.cpp
MipsEmitGPRestore.cpp MipsEmitGPRestore.cpp
MipsExpandPseudo.cpp MipsExpandPseudo.cpp
MipsJITInfo.cpp MipsJITInfo.cpp

215
lib/Target/Mips/MipsELFWriterInfo.cpp Normal file
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@@ -0,0 +1,215 @@
//===-- MipsELFWriterInfo.cpp - ELF Writer Info for the Mips backend ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements ELF writer information for the Mips backend.
//
//===----------------------------------------------------------------------===//
#include "MipsELFWriterInfo.h"
#include "MipsRelocations.h"
#include "llvm/Function.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
using namespace llvm;
//===----------------------------------------------------------------------===//
// Implementation of the MipsELFWriterInfo class
//===----------------------------------------------------------------------===//
MipsELFWriterInfo::MipsELFWriterInfo(bool is64Bit_, bool isLittleEndian_)
: TargetELFWriterInfo(is64Bit_, isLittleEndian_) {
EMachine = EM_MIPS;
}
MipsELFWriterInfo::~MipsELFWriterInfo() {}
unsigned MipsELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
if (is64Bit) {
switch(MachineRelTy) {
default:
llvm_unreachable("unknown Mips_64 machine relocation type");
}
} else {
switch(MachineRelTy) {
case Mips::reloc_mips_pcrel:
return ELF::R_MIPS_PC16;
case Mips::reloc_mips_hi:
return ELF::R_MIPS_HI16;
case Mips::reloc_mips_lo:
return ELF::R_MIPS_LO16;
case Mips::reloc_mips_j_jal:
return ELF::R_MIPS_26;
case Mips::reloc_mips_16:
return ELF::R_MIPS_16;
case Mips::reloc_mips_32:
return ELF::R_MIPS_32;
case Mips::reloc_mips_rel32:
return ELF::R_MIPS_REL32;
case Mips::reloc_mips_gprel16:
return ELF::R_MIPS_GPREL16;
case Mips::reloc_mips_literal:
return ELF::R_MIPS_LITERAL;
case Mips::reloc_mips_got16:
return ELF::R_MIPS_GOT16;
case Mips::reloc_mips_call16:
return ELF::R_MIPS_CALL16;
case Mips::reloc_mips_gprel32:
return ELF::R_MIPS_GPREL32;
case Mips::reloc_mips_shift5:
return ELF::R_MIPS_SHIFT5;
case Mips::reloc_mips_shift6:
return ELF::R_MIPS_SHIFT6;
case Mips::reloc_mips_64:
return ELF::R_MIPS_64;
case Mips::reloc_mips_tlsgd:
return ELF::R_MIPS_TLS_GD;
case Mips::reloc_mips_gottprel:
return ELF::R_MIPS_TLS_GOTTPREL;
case Mips::reloc_mips_tprel_hi:
return ELF::R_MIPS_TLS_TPREL_HI16;
case Mips::reloc_mips_tprel_lo:
return ELF::R_MIPS_TLS_TPREL_LO16;
case Mips::reloc_mips_branch_pcrel:
return ELF::R_MIPS_PC16;
default:
llvm_unreachable("unknown Mips machine relocation type");
}
}
return 0;
}
long int MipsELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
long int Modifier) const {
if (is64Bit) {
switch(RelTy) {
default:
llvm_unreachable("unknown Mips_64 relocation type");
}
} else {
switch(RelTy) {
case ELF::R_MIPS_PC16: return Modifier - 4;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
return 0;
}
unsigned MipsELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
if (is64Bit) {
switch(RelTy) {
case ELF::R_MIPS_PC16:
case ELF::R_MIPS_HI16:
case ELF::R_MIPS_LO16:
case ELF::R_MIPS_26:
case ELF::R_MIPS_16:
case ELF::R_MIPS_32:
case ELF::R_MIPS_REL32:
case ELF::R_MIPS_GPREL16:
case ELF::R_MIPS_LITERAL:
case ELF::R_MIPS_GOT16:
case ELF::R_MIPS_CALL16:
case ELF::R_MIPS_GPREL32:
case ELF::R_MIPS_SHIFT5:
case ELF::R_MIPS_SHIFT6:
return 32;
case ELF::R_MIPS_64:
return 64;
default:
llvm_unreachable("unknown Mips_64 relocation type");
}
} else {
switch(RelTy) {
case ELF::R_MIPS_PC16:
case ELF::R_MIPS_HI16:
case ELF::R_MIPS_LO16:
case ELF::R_MIPS_26:
case ELF::R_MIPS_16:
case ELF::R_MIPS_32:
case ELF::R_MIPS_REL32:
case ELF::R_MIPS_GPREL16:
case ELF::R_MIPS_LITERAL:
case ELF::R_MIPS_GOT16:
case ELF::R_MIPS_CALL16:
case ELF::R_MIPS_GPREL32:
case ELF::R_MIPS_SHIFT5:
case ELF::R_MIPS_SHIFT6:
return 32;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
return 0;
}
bool MipsELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
if (is64Bit) {
switch(RelTy) {
case ELF::R_MIPS_PC16:
return true;
case ELF::R_MIPS_HI16:
case ELF::R_MIPS_LO16:
case ELF::R_MIPS_26:
case ELF::R_MIPS_16:
case ELF::R_MIPS_32:
case ELF::R_MIPS_REL32:
case ELF::R_MIPS_GPREL16:
case ELF::R_MIPS_LITERAL:
case ELF::R_MIPS_GOT16:
case ELF::R_MIPS_CALL16:
case ELF::R_MIPS_GPREL32:
case ELF::R_MIPS_SHIFT5:
case ELF::R_MIPS_SHIFT6:
case ELF::R_MIPS_64:
return false;
default:
llvm_unreachable("unknown Mips_64 relocation type");
}
} else {
switch(RelTy) {
case ELF::R_MIPS_PC16:
return true;
case ELF::R_MIPS_HI16:
case ELF::R_MIPS_LO16:
case ELF::R_MIPS_26:
case ELF::R_MIPS_16:
case ELF::R_MIPS_32:
case ELF::R_MIPS_REL32:
case ELF::R_MIPS_GPREL16:
case ELF::R_MIPS_LITERAL:
case ELF::R_MIPS_GOT16:
case ELF::R_MIPS_CALL16:
case ELF::R_MIPS_GPREL32:
case ELF::R_MIPS_SHIFT5:
case ELF::R_MIPS_SHIFT6:
return false;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
return 0;
}
unsigned MipsELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
assert("getAbsoluteLabelMachineRelTy unknown for this relocation type");
return 0;
}
long int MipsELFWriterInfo::computeRelocation(unsigned SymOffset,
unsigned RelOffset,
unsigned RelTy) const {
if (RelTy == ELF::R_MIPS_PC16)
return SymOffset - (RelOffset + 4);
else
assert("computeRelocation unknown for this relocation type");
return 0;
}

60
lib/Target/Mips/MipsELFWriterInfo.h Normal file
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@@ -0,0 +1,60 @@
//===-- MipsELFWriterInfo.h - ELF Writer Info for Mips ----------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements ELF writer information for the Mips backend.
//
//===----------------------------------------------------------------------===//
#ifndef Mips_ELF_WRITER_INFO_H
#define Mips_ELF_WRITER_INFO_H
#include "llvm/Target/TargetELFWriterInfo.h"
namespace llvm {
class MipsELFWriterInfo : public TargetELFWriterInfo {
public:
MipsELFWriterInfo(bool, bool);
virtual ~MipsELFWriterInfo();
/// getRelocationType - Returns the target specific ELF Relocation type.
/// 'MachineRelTy' contains the object code independent relocation type
virtual unsigned getRelocationType(unsigned MachineRelTy) const;
/// hasRelocationAddend - True if the target uses an addend in the
/// ELF relocation entry.
virtual bool hasRelocationAddend() const { return true; }
// FIXME Should be case by case
/// getDefaultAddendForRelTy - Gets the default addend value for a
/// relocation entry based on the target ELF relocation type.
virtual long int getDefaultAddendForRelTy(unsigned RelTy,
long int Modifier = 0) const;
/// getRelTySize - Returns the size of relocatable field in bits
virtual unsigned getRelocationTySize(unsigned RelTy) const;
/// isPCRelativeRel - True if the relocation type is pc relative
virtual bool isPCRelativeRel(unsigned RelTy) const;
/// getJumpTableRelocationTy - Returns the machine relocation type used
/// to reference a jumptable.
virtual unsigned getAbsoluteLabelMachineRelTy() const;
/// computeRelocation - Some relocatable fields could be relocated
/// directly, avoiding the relocation symbol emission, compute the
/// final relocation value for this symbol.
virtual long int computeRelocation(unsigned SymOffset, unsigned RelOffset,
unsigned RelTy) const;
};
} // end llvm namespace
#endif // Mips_ELF_WRITER_INFO_H