[llvm-commits] [llvm] r141937 - in /llvm/trunk/lib/Target/Mips: CMakeLists.txt MipsELFWriterInfo.cpp MipsELFWriterInfo.h
Akira Hatanaka
ahatanaka at mips.com
Thu Oct 13 19:55:48 PDT 2011
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.
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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