12754fe60SDimitry Andric //===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===//
22754fe60SDimitry Andric //
32754fe60SDimitry Andric //                     The LLVM Compiler Infrastructure
42754fe60SDimitry Andric //
52754fe60SDimitry Andric // This file is distributed under the University of Illinois Open Source
62754fe60SDimitry Andric // License. See LICENSE.TXT for details.
72754fe60SDimitry Andric //
82754fe60SDimitry Andric //===----------------------------------------------------------------------===//
92754fe60SDimitry Andric //
10dff0c46cSDimitry Andric // Part of the ELFObjectFile class implementation.
112754fe60SDimitry Andric //
122754fe60SDimitry Andric //===----------------------------------------------------------------------===//
132754fe60SDimitry Andric 
14f785676fSDimitry Andric #include "llvm/Object/ELFObjectFile.h"
15139f7f9bSDimitry Andric #include "llvm/Support/MathExtras.h"
162754fe60SDimitry Andric 
17dff0c46cSDimitry Andric namespace llvm {
182754fe60SDimitry Andric using namespace object;
192754fe60SDimitry Andric 
2039d628a0SDimitry Andric ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)
2139d628a0SDimitry Andric     : ObjectFile(Type, Source) {}
2239d628a0SDimitry Andric 
2339d628a0SDimitry Andric ErrorOr<std::unique_ptr<ObjectFile>>
2439d628a0SDimitry Andric ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {
2591bc56edSDimitry Andric   std::pair<unsigned char, unsigned char> Ident =
2639d628a0SDimitry Andric       getElfArchType(Obj.getBuffer());
27139f7f9bSDimitry Andric   std::size_t MaxAlignment =
2839d628a0SDimitry Andric       1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart()));
29139f7f9bSDimitry Andric 
3097bc6c73SDimitry Andric   if (MaxAlignment < 2)
3197bc6c73SDimitry Andric     return object_error::parse_failed;
3297bc6c73SDimitry Andric 
3391bc56edSDimitry Andric   std::error_code EC;
3491bc56edSDimitry Andric   std::unique_ptr<ObjectFile> R;
3597bc6c73SDimitry Andric   if (Ident.first == ELF::ELFCLASS32) {
3697bc6c73SDimitry Andric     if (Ident.second == ELF::ELFDATA2LSB)
3797bc6c73SDimitry Andric       R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC));
3897bc6c73SDimitry Andric     else if (Ident.second == ELF::ELFDATA2MSB)
3997bc6c73SDimitry Andric       R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC));
40139f7f9bSDimitry Andric     else
4191bc56edSDimitry Andric       return object_error::parse_failed;
4297bc6c73SDimitry Andric   } else if (Ident.first == ELF::ELFCLASS64) {
4397bc6c73SDimitry Andric     if (Ident.second == ELF::ELFDATA2LSB)
4497bc6c73SDimitry Andric       R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC));
4597bc6c73SDimitry Andric     else if (Ident.second == ELF::ELFDATA2MSB)
4697bc6c73SDimitry Andric       R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC));
47139f7f9bSDimitry Andric     else
4891bc56edSDimitry Andric       return object_error::parse_failed;
4997bc6c73SDimitry Andric   } else {
5091bc56edSDimitry Andric     return object_error::parse_failed;
51dff0c46cSDimitry Andric   }
52dff0c46cSDimitry Andric 
5391bc56edSDimitry Andric   if (EC)
5491bc56edSDimitry Andric     return EC;
5539d628a0SDimitry Andric   return std::move(R);
562754fe60SDimitry Andric }
572754fe60SDimitry Andric 
583ca95b02SDimitry Andric SubtargetFeatures ELFObjectFileBase::getFeatures() const {
593ca95b02SDimitry Andric   switch (getEMachine()) {
603ca95b02SDimitry Andric   case ELF::EM_MIPS: {
613ca95b02SDimitry Andric     SubtargetFeatures Features;
623ca95b02SDimitry Andric     unsigned PlatformFlags;
633ca95b02SDimitry Andric     getPlatformFlags(PlatformFlags);
643ca95b02SDimitry Andric 
653ca95b02SDimitry Andric     switch (PlatformFlags & ELF::EF_MIPS_ARCH) {
663ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_1:
673ca95b02SDimitry Andric       break;
683ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_2:
693ca95b02SDimitry Andric       Features.AddFeature("mips2");
703ca95b02SDimitry Andric       break;
713ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_3:
723ca95b02SDimitry Andric       Features.AddFeature("mips3");
733ca95b02SDimitry Andric       break;
743ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_4:
753ca95b02SDimitry Andric       Features.AddFeature("mips4");
763ca95b02SDimitry Andric       break;
773ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_5:
783ca95b02SDimitry Andric       Features.AddFeature("mips5");
793ca95b02SDimitry Andric       break;
803ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_32:
813ca95b02SDimitry Andric       Features.AddFeature("mips32");
823ca95b02SDimitry Andric       break;
833ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_64:
843ca95b02SDimitry Andric       Features.AddFeature("mips64");
853ca95b02SDimitry Andric       break;
863ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_32R2:
873ca95b02SDimitry Andric       Features.AddFeature("mips32r2");
883ca95b02SDimitry Andric       break;
893ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_64R2:
903ca95b02SDimitry Andric       Features.AddFeature("mips64r2");
913ca95b02SDimitry Andric       break;
923ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_32R6:
933ca95b02SDimitry Andric       Features.AddFeature("mips32r6");
943ca95b02SDimitry Andric       break;
953ca95b02SDimitry Andric     case ELF::EF_MIPS_ARCH_64R6:
963ca95b02SDimitry Andric       Features.AddFeature("mips64r6");
973ca95b02SDimitry Andric       break;
983ca95b02SDimitry Andric     default:
993ca95b02SDimitry Andric       llvm_unreachable("Unknown EF_MIPS_ARCH value");
1003ca95b02SDimitry Andric     }
1013ca95b02SDimitry Andric 
1023ca95b02SDimitry Andric     switch (PlatformFlags & ELF::EF_MIPS_MACH) {
1033ca95b02SDimitry Andric     case ELF::EF_MIPS_MACH_NONE:
1043ca95b02SDimitry Andric       // No feature associated with this value.
1053ca95b02SDimitry Andric       break;
1063ca95b02SDimitry Andric     case ELF::EF_MIPS_MACH_OCTEON:
1073ca95b02SDimitry Andric       Features.AddFeature("cnmips");
1083ca95b02SDimitry Andric       break;
1093ca95b02SDimitry Andric     default:
1103ca95b02SDimitry Andric       llvm_unreachable("Unknown EF_MIPS_ARCH value");
1113ca95b02SDimitry Andric     }
1123ca95b02SDimitry Andric 
1133ca95b02SDimitry Andric     if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16)
1143ca95b02SDimitry Andric       Features.AddFeature("mips16");
1153ca95b02SDimitry Andric     if (PlatformFlags & ELF::EF_MIPS_MICROMIPS)
1163ca95b02SDimitry Andric       Features.AddFeature("micromips");
1173ca95b02SDimitry Andric 
1183ca95b02SDimitry Andric     return Features;
1193ca95b02SDimitry Andric   }
1203ca95b02SDimitry Andric   default:
1213ca95b02SDimitry Andric     return SubtargetFeatures();
1223ca95b02SDimitry Andric   }
1233ca95b02SDimitry Andric }
1243ca95b02SDimitry Andric 
1252754fe60SDimitry Andric } // end namespace llvm
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