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author | Akira Hatanaka <ahatanaka@mips.com> | 2012-08-17 21:38:47 +0000 |
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committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-08-17 21:38:47 +0000 |
commit | 3028d38f6e55ae3808f97f7b5b0d7686f6483bdb (patch) | |
tree | 3fd2d81c15ecaf338f4e40dabcb9ac015d7180d6 /lib/Target/Mips | |
parent | b889e0cd2fea4afee623d5be603b912b955a2eca (diff) | |
download | external_llvm-3028d38f6e55ae3808f97f7b5b0d7686f6483bdb.zip external_llvm-3028d38f6e55ae3808f97f7b5b0d7686f6483bdb.tar.gz external_llvm-3028d38f6e55ae3808f97f7b5b0d7686f6483bdb.tar.bz2 |
Add MipsELFWriterInfo.{h,cpp}.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162136 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips')
-rw-r--r-- | lib/Target/Mips/MipsELFWriterInfo.cpp | 92 | ||||
-rw-r--r-- | lib/Target/Mips/MipsELFWriterInfo.h | 59 |
2 files changed, 151 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsELFWriterInfo.cpp b/lib/Target/Mips/MipsELFWriterInfo.cpp new file mode 100644 index 0000000..f104b40 --- /dev/null +++ b/lib/Target/Mips/MipsELFWriterInfo.cpp @@ -0,0 +1,92 @@ +//===-- 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/ErrorHandling.h" +#include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Support/ELF.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 { + switch(MachineRelTy) { + case Mips::reloc_mips_pc16: + return ELF::R_MIPS_GOT16; + case Mips::reloc_mips_hi: + return ELF::R_MIPS_HI16; + case Mips::reloc_mips_lo: + return ELF::R_MIPS_LO16; + case Mips::reloc_mips_26: + return ELF::R_MIPS_26; + default: + llvm_unreachable("unknown Mips machine relocation type"); + } +} + +long int MipsELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy, + long int Modifier) const { + switch(RelTy) { + case ELF::R_MIPS_26: return Modifier; + default: + llvm_unreachable("unknown Mips relocation type"); + } +} + +unsigned MipsELFWriterInfo::getRelocationTySize(unsigned RelTy) const { + switch(RelTy) { + case ELF::R_MIPS_GOT16: + case ELF::R_MIPS_26: + return 32; + default: + llvm_unreachable("unknown Mips relocation type"); + } +} + +bool MipsELFWriterInfo::isPCRelativeRel(unsigned RelTy) const { + switch(RelTy) { + case ELF::R_MIPS_GOT16: + return true; + case ELF::R_MIPS_26: + return false; + default: + llvm_unreachable("unknown Mips relocation type"); + } +} + +unsigned MipsELFWriterInfo::getAbsoluteLabelMachineRelTy() const { + return Mips::reloc_mips_26; +} + +long int MipsELFWriterInfo::computeRelocation(unsigned SymOffset, + unsigned RelOffset, + unsigned RelTy) const { + + if (RelTy == ELF::R_MIPS_GOT16) + return SymOffset - (RelOffset + 4); + + llvm_unreachable("computeRelocation unknown for this relocation type"); +} diff --git a/lib/Target/Mips/MipsELFWriterInfo.h b/lib/Target/Mips/MipsELFWriterInfo.h new file mode 100644 index 0000000..23f3f03 --- /dev/null +++ b/lib/Target/Mips/MipsELFWriterInfo.h @@ -0,0 +1,59 @@ +//===-- 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 is64Bit_, bool isLittleEndian_); + 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 is64Bit ? true : false; } + + /// 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 |