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e3e43d9d57
I did this a long time ago with a janky python script, but now clang-format has built-in support for this. I fed clang-format every line with a #include and let it re-sort things according to the precise LLVM rules for include ordering baked into clang-format these days. I've reverted a number of files where the results of sorting includes isn't healthy. Either places where we have legacy code relying on particular include ordering (where possible, I'll fix these separately) or where we have particular formatting around #include lines that I didn't want to disturb in this patch. This patch is *entirely* mechanical. If you get merge conflicts or anything, just ignore the changes in this patch and run clang-format over your #include lines in the files. Sorry for any noise here, but it is important to keep these things stable. I was seeing an increasing number of patches with irrelevant re-ordering of #include lines because clang-format was used. This patch at least isolates that churn, makes it easy to skip when resolving conflicts, and gets us to a clean baseline (again). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@304787 91177308-0d34-0410-b5e6-96231b3b80d8
317 lines
8.6 KiB
C++
317 lines
8.6 KiB
C++
//===- ELFObjectFile.cpp - ELF object file implementation -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Part of the ELFObjectFile class implementation.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ELFTypes.h"
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#include "llvm/Object/Error.h"
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#include "llvm/Support/ARMAttributeParser.h"
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#include "llvm/Support/ARMBuildAttributes.h"
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#include "llvm/Support/ELF.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MathExtras.h"
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#include <algorithm>
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include <system_error>
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#include <utility>
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using namespace llvm;
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using namespace object;
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ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source)
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: ObjectFile(Type, Source) {}
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ErrorOr<std::unique_ptr<ObjectFile>>
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ObjectFile::createELFObjectFile(MemoryBufferRef Obj) {
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std::pair<unsigned char, unsigned char> Ident =
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getElfArchType(Obj.getBuffer());
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std::size_t MaxAlignment =
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1ULL << countTrailingZeros(uintptr_t(Obj.getBufferStart()));
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if (MaxAlignment < 2)
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return object_error::parse_failed;
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std::error_code EC;
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std::unique_ptr<ObjectFile> R;
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if (Ident.first == ELF::ELFCLASS32) {
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if (Ident.second == ELF::ELFDATA2LSB)
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R.reset(new ELFObjectFile<ELFType<support::little, false>>(Obj, EC));
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else if (Ident.second == ELF::ELFDATA2MSB)
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R.reset(new ELFObjectFile<ELFType<support::big, false>>(Obj, EC));
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else
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return object_error::parse_failed;
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} else if (Ident.first == ELF::ELFCLASS64) {
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if (Ident.second == ELF::ELFDATA2LSB)
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R.reset(new ELFObjectFile<ELFType<support::little, true>>(Obj, EC));
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else if (Ident.second == ELF::ELFDATA2MSB)
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R.reset(new ELFObjectFile<ELFType<support::big, true>>(Obj, EC));
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else
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return object_error::parse_failed;
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} else {
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return object_error::parse_failed;
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}
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if (EC)
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return EC;
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return std::move(R);
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}
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SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const {
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SubtargetFeatures Features;
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unsigned PlatformFlags;
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getPlatformFlags(PlatformFlags);
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switch (PlatformFlags & ELF::EF_MIPS_ARCH) {
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case ELF::EF_MIPS_ARCH_1:
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break;
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case ELF::EF_MIPS_ARCH_2:
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Features.AddFeature("mips2");
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break;
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case ELF::EF_MIPS_ARCH_3:
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Features.AddFeature("mips3");
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break;
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case ELF::EF_MIPS_ARCH_4:
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Features.AddFeature("mips4");
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break;
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case ELF::EF_MIPS_ARCH_5:
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Features.AddFeature("mips5");
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break;
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case ELF::EF_MIPS_ARCH_32:
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Features.AddFeature("mips32");
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break;
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case ELF::EF_MIPS_ARCH_64:
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Features.AddFeature("mips64");
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break;
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case ELF::EF_MIPS_ARCH_32R2:
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Features.AddFeature("mips32r2");
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break;
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case ELF::EF_MIPS_ARCH_64R2:
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Features.AddFeature("mips64r2");
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break;
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case ELF::EF_MIPS_ARCH_32R6:
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Features.AddFeature("mips32r6");
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break;
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case ELF::EF_MIPS_ARCH_64R6:
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Features.AddFeature("mips64r6");
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break;
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default:
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llvm_unreachable("Unknown EF_MIPS_ARCH value");
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}
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switch (PlatformFlags & ELF::EF_MIPS_MACH) {
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case ELF::EF_MIPS_MACH_NONE:
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// No feature associated with this value.
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break;
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case ELF::EF_MIPS_MACH_OCTEON:
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Features.AddFeature("cnmips");
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break;
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default:
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llvm_unreachable("Unknown EF_MIPS_ARCH value");
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}
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if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16)
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Features.AddFeature("mips16");
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if (PlatformFlags & ELF::EF_MIPS_MICROMIPS)
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Features.AddFeature("micromips");
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return Features;
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}
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SubtargetFeatures ELFObjectFileBase::getARMFeatures() const {
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SubtargetFeatures Features;
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ARMAttributeParser Attributes;
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std::error_code EC = getBuildAttributes(Attributes);
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if (EC)
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return SubtargetFeatures();
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// both ARMv7-M and R have to support thumb hardware div
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bool isV7 = false;
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if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch))
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isV7 = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch)
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== ARMBuildAttrs::v7;
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if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch_profile)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch_profile)) {
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case ARMBuildAttrs::ApplicationProfile:
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Features.AddFeature("aclass");
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break;
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case ARMBuildAttrs::RealTimeProfile:
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Features.AddFeature("rclass");
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if (isV7)
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Features.AddFeature("hwdiv");
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break;
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case ARMBuildAttrs::MicroControllerProfile:
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Features.AddFeature("mclass");
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if (isV7)
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Features.AddFeature("hwdiv");
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break;
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}
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}
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if (Attributes.hasAttribute(ARMBuildAttrs::THUMB_ISA_use)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::THUMB_ISA_use)) {
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default:
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break;
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case ARMBuildAttrs::Not_Allowed:
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Features.AddFeature("thumb", false);
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Features.AddFeature("thumb2", false);
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break;
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case ARMBuildAttrs::AllowThumb32:
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Features.AddFeature("thumb2");
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break;
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}
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}
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if (Attributes.hasAttribute(ARMBuildAttrs::FP_arch)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::FP_arch)) {
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default:
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break;
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case ARMBuildAttrs::Not_Allowed:
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Features.AddFeature("vfp2", false);
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Features.AddFeature("vfp3", false);
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Features.AddFeature("vfp4", false);
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break;
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case ARMBuildAttrs::AllowFPv2:
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Features.AddFeature("vfp2");
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break;
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case ARMBuildAttrs::AllowFPv3A:
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case ARMBuildAttrs::AllowFPv3B:
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Features.AddFeature("vfp3");
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break;
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case ARMBuildAttrs::AllowFPv4A:
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case ARMBuildAttrs::AllowFPv4B:
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Features.AddFeature("vfp4");
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break;
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}
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}
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if (Attributes.hasAttribute(ARMBuildAttrs::Advanced_SIMD_arch)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::Advanced_SIMD_arch)) {
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default:
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break;
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case ARMBuildAttrs::Not_Allowed:
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Features.AddFeature("neon", false);
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Features.AddFeature("fp16", false);
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break;
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case ARMBuildAttrs::AllowNeon:
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Features.AddFeature("neon");
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break;
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case ARMBuildAttrs::AllowNeon2:
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Features.AddFeature("neon");
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Features.AddFeature("fp16");
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break;
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}
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}
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if (Attributes.hasAttribute(ARMBuildAttrs::DIV_use)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::DIV_use)) {
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default:
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break;
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case ARMBuildAttrs::DisallowDIV:
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Features.AddFeature("hwdiv", false);
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Features.AddFeature("hwdiv-arm", false);
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break;
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case ARMBuildAttrs::AllowDIVExt:
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Features.AddFeature("hwdiv");
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Features.AddFeature("hwdiv-arm");
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break;
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}
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}
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return Features;
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}
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SubtargetFeatures ELFObjectFileBase::getFeatures() const {
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switch (getEMachine()) {
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case ELF::EM_MIPS:
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return getMIPSFeatures();
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case ELF::EM_ARM:
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return getARMFeatures();
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default:
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return SubtargetFeatures();
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}
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}
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// FIXME Encode from a tablegen description or target parser.
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void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const {
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if (TheTriple.getSubArch() != Triple::NoSubArch)
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return;
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ARMAttributeParser Attributes;
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std::error_code EC = getBuildAttributes(Attributes);
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if (EC)
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return;
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std::string Triple;
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// Default to ARM, but use the triple if it's been set.
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if (TheTriple.getArch() == Triple::thumb ||
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TheTriple.getArch() == Triple::thumbeb)
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Triple = "thumb";
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else
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Triple = "arm";
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if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch)) {
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switch(Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch)) {
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case ARMBuildAttrs::v4:
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Triple += "v4";
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break;
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case ARMBuildAttrs::v4T:
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Triple += "v4t";
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break;
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case ARMBuildAttrs::v5T:
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Triple += "v5t";
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break;
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case ARMBuildAttrs::v5TE:
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Triple += "v5te";
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break;
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case ARMBuildAttrs::v5TEJ:
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Triple += "v5tej";
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break;
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case ARMBuildAttrs::v6:
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Triple += "v6";
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break;
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case ARMBuildAttrs::v6KZ:
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Triple += "v6kz";
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break;
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case ARMBuildAttrs::v6T2:
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Triple += "v6t2";
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break;
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case ARMBuildAttrs::v6K:
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Triple += "v6k";
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break;
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case ARMBuildAttrs::v7:
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Triple += "v7";
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break;
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case ARMBuildAttrs::v6_M:
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Triple += "v6m";
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break;
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case ARMBuildAttrs::v6S_M:
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Triple += "v6sm";
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break;
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case ARMBuildAttrs::v7E_M:
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Triple += "v7em";
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break;
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}
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}
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if (!isLittleEndian())
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Triple += "eb";
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TheTriple.setArchName(Triple);
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}
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