[llvm-commits] [llvm] r141937 - in /llvm/trunk/lib/Target/Mips: CMakeLists.txt MipsELFWriterInfo.cpp MipsELFWriterInfo.h
Eli Friedman
eli.friedman at gmail.com
Thu Oct 13 20:10:40 PDT 2011
On Thu, Oct 13, 2011 at 7:55 PM, Akira Hatanaka <ahatanaka at mips.com> wrote:
> Author: ahatanak
> Date: Thu Oct 13 21:55:47 2011
> New Revision: 141937
>
> URL: http://llvm.org/viewvc/llvm-project?rev=141937&view=rev
> Log:
> Add definition of class MipsELFWriterInfo.
You shouldn't need this class for anything MC related;
TargetELFWriterInfo is only used for the old-style JIT.
-Eli
> Patch by Jack Carter and Reed Kotler at Mips.
>
> Added:
> llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.cpp
> llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.h
> Modified:
> llvm/trunk/lib/Target/Mips/CMakeLists.txt
>
> Modified: llvm/trunk/lib/Target/Mips/CMakeLists.txt
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/CMakeLists.txt?rev=141937&r1=141936&r2=141937&view=diff
> ==============================================================================
> --- llvm/trunk/lib/Target/Mips/CMakeLists.txt (original)
> +++ llvm/trunk/lib/Target/Mips/CMakeLists.txt Thu Oct 13 21:55:47 2011
> @@ -12,6 +12,7 @@
> MipsAsmPrinter.cpp
> MipsCodeEmitter.cpp
> MipsDelaySlotFiller.cpp
> + MipsELFWriterInfo.cpp
> MipsEmitGPRestore.cpp
> MipsExpandPseudo.cpp
> MipsJITInfo.cpp
>
> Added: llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.cpp?rev=141937&view=auto
> ==============================================================================
> --- llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.cpp (added)
> +++ llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.cpp Thu Oct 13 21:55:47 2011
> @@ -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;
> +}
>
> Added: llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.h
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.h?rev=141937&view=auto
> ==============================================================================
> --- llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.h (added)
> +++ llvm/trunk/lib/Target/Mips/MipsELFWriterInfo.h Thu Oct 13 21:55:47 2011
> @@ -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
>
>
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