diff options
Diffstat (limited to 'contrib/llvm/lib/Object/ELFObjectFile.cpp')
| -rw-r--r-- | contrib/llvm/lib/Object/ELFObjectFile.cpp | 281 |
1 files changed, 236 insertions, 45 deletions
diff --git a/contrib/llvm/lib/Object/ELFObjectFile.cpp b/contrib/llvm/lib/Object/ELFObjectFile.cpp index 4bd69e3..fa136d7 100644 --- a/contrib/llvm/lib/Object/ELFObjectFile.cpp +++ b/contrib/llvm/lib/Object/ELFObjectFile.cpp @@ -1,4 +1,4 @@ -//===- ELFObjectFile.cpp - ELF object file implementation -------*- C++ -*-===// +//===- ELFObjectFile.cpp - ELF object file implementation -----------------===// // // The LLVM Compiler Infrastructure // @@ -12,9 +12,26 @@ //===----------------------------------------------------------------------===// #include "llvm/Object/ELFObjectFile.h" +#include "llvm/ADT/Triple.h" +#include "llvm/BinaryFormat/ELF.h" +#include "llvm/MC/SubtargetFeature.h" +#include "llvm/Object/ELF.h" +#include "llvm/Object/ELFTypes.h" +#include "llvm/Object/Error.h" +#include "llvm/Support/ARMAttributeParser.h" +#include "llvm/Support/ARMBuildAttributes.h" +#include "llvm/Support/Endian.h" +#include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MathExtras.h" +#include <algorithm> +#include <cstddef> +#include <cstdint> +#include <memory> +#include <string> +#include <system_error> +#include <utility> -namespace llvm { +using namespace llvm; using namespace object; ELFObjectFileBase::ELFObjectFileBase(unsigned int Type, MemoryBufferRef Source) @@ -55,71 +72,245 @@ ObjectFile::createELFObjectFile(MemoryBufferRef Obj) { return std::move(R); } -SubtargetFeatures ELFObjectFileBase::getFeatures() const { - switch (getEMachine()) { - case ELF::EM_MIPS: { - SubtargetFeatures Features; - unsigned PlatformFlags; - getPlatformFlags(PlatformFlags); +SubtargetFeatures ELFObjectFileBase::getMIPSFeatures() const { + SubtargetFeatures Features; + unsigned PlatformFlags; + getPlatformFlags(PlatformFlags); + + switch (PlatformFlags & ELF::EF_MIPS_ARCH) { + case ELF::EF_MIPS_ARCH_1: + break; + case ELF::EF_MIPS_ARCH_2: + Features.AddFeature("mips2"); + break; + case ELF::EF_MIPS_ARCH_3: + Features.AddFeature("mips3"); + break; + case ELF::EF_MIPS_ARCH_4: + Features.AddFeature("mips4"); + break; + case ELF::EF_MIPS_ARCH_5: + Features.AddFeature("mips5"); + break; + case ELF::EF_MIPS_ARCH_32: + Features.AddFeature("mips32"); + break; + case ELF::EF_MIPS_ARCH_64: + Features.AddFeature("mips64"); + break; + case ELF::EF_MIPS_ARCH_32R2: + Features.AddFeature("mips32r2"); + break; + case ELF::EF_MIPS_ARCH_64R2: + Features.AddFeature("mips64r2"); + break; + case ELF::EF_MIPS_ARCH_32R6: + Features.AddFeature("mips32r6"); + break; + case ELF::EF_MIPS_ARCH_64R6: + Features.AddFeature("mips64r6"); + break; + default: + llvm_unreachable("Unknown EF_MIPS_ARCH value"); + } + + switch (PlatformFlags & ELF::EF_MIPS_MACH) { + case ELF::EF_MIPS_MACH_NONE: + // No feature associated with this value. + break; + case ELF::EF_MIPS_MACH_OCTEON: + Features.AddFeature("cnmips"); + break; + default: + llvm_unreachable("Unknown EF_MIPS_ARCH value"); + } + + if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16) + Features.AddFeature("mips16"); + if (PlatformFlags & ELF::EF_MIPS_MICROMIPS) + Features.AddFeature("micromips"); + + return Features; +} + +SubtargetFeatures ELFObjectFileBase::getARMFeatures() const { + SubtargetFeatures Features; + ARMAttributeParser Attributes; + std::error_code EC = getBuildAttributes(Attributes); + if (EC) + return SubtargetFeatures(); + + // both ARMv7-M and R have to support thumb hardware div + bool isV7 = false; + if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch)) + isV7 = Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch) + == ARMBuildAttrs::v7; - switch (PlatformFlags & ELF::EF_MIPS_ARCH) { - case ELF::EF_MIPS_ARCH_1: + if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch_profile)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch_profile)) { + case ARMBuildAttrs::ApplicationProfile: + Features.AddFeature("aclass"); break; - case ELF::EF_MIPS_ARCH_2: - Features.AddFeature("mips2"); + case ARMBuildAttrs::RealTimeProfile: + Features.AddFeature("rclass"); + if (isV7) + Features.AddFeature("hwdiv"); break; - case ELF::EF_MIPS_ARCH_3: - Features.AddFeature("mips3"); + case ARMBuildAttrs::MicroControllerProfile: + Features.AddFeature("mclass"); + if (isV7) + Features.AddFeature("hwdiv"); break; - case ELF::EF_MIPS_ARCH_4: - Features.AddFeature("mips4"); + } + } + + if (Attributes.hasAttribute(ARMBuildAttrs::THUMB_ISA_use)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::THUMB_ISA_use)) { + default: break; - case ELF::EF_MIPS_ARCH_5: - Features.AddFeature("mips5"); + case ARMBuildAttrs::Not_Allowed: + Features.AddFeature("thumb", false); + Features.AddFeature("thumb2", false); break; - case ELF::EF_MIPS_ARCH_32: - Features.AddFeature("mips32"); + case ARMBuildAttrs::AllowThumb32: + Features.AddFeature("thumb2"); break; - case ELF::EF_MIPS_ARCH_64: - Features.AddFeature("mips64"); + } + } + + if (Attributes.hasAttribute(ARMBuildAttrs::FP_arch)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::FP_arch)) { + default: break; - case ELF::EF_MIPS_ARCH_32R2: - Features.AddFeature("mips32r2"); + case ARMBuildAttrs::Not_Allowed: + Features.AddFeature("vfp2", false); + Features.AddFeature("vfp3", false); + Features.AddFeature("vfp4", false); break; - case ELF::EF_MIPS_ARCH_64R2: - Features.AddFeature("mips64r2"); + case ARMBuildAttrs::AllowFPv2: + Features.AddFeature("vfp2"); break; - case ELF::EF_MIPS_ARCH_32R6: - Features.AddFeature("mips32r6"); + case ARMBuildAttrs::AllowFPv3A: + case ARMBuildAttrs::AllowFPv3B: + Features.AddFeature("vfp3"); break; - case ELF::EF_MIPS_ARCH_64R6: - Features.AddFeature("mips64r6"); + case ARMBuildAttrs::AllowFPv4A: + case ARMBuildAttrs::AllowFPv4B: + Features.AddFeature("vfp4"); break; - default: - llvm_unreachable("Unknown EF_MIPS_ARCH value"); } + } - switch (PlatformFlags & ELF::EF_MIPS_MACH) { - case ELF::EF_MIPS_MACH_NONE: - // No feature associated with this value. + if (Attributes.hasAttribute(ARMBuildAttrs::Advanced_SIMD_arch)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::Advanced_SIMD_arch)) { + default: + break; + case ARMBuildAttrs::Not_Allowed: + Features.AddFeature("neon", false); + Features.AddFeature("fp16", false); break; - case ELF::EF_MIPS_MACH_OCTEON: - Features.AddFeature("cnmips"); + case ARMBuildAttrs::AllowNeon: + Features.AddFeature("neon"); break; + case ARMBuildAttrs::AllowNeon2: + Features.AddFeature("neon"); + Features.AddFeature("fp16"); + break; + } + } + + if (Attributes.hasAttribute(ARMBuildAttrs::DIV_use)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::DIV_use)) { default: - llvm_unreachable("Unknown EF_MIPS_ARCH value"); + break; + case ARMBuildAttrs::DisallowDIV: + Features.AddFeature("hwdiv", false); + Features.AddFeature("hwdiv-arm", false); + break; + case ARMBuildAttrs::AllowDIVExt: + Features.AddFeature("hwdiv"); + Features.AddFeature("hwdiv-arm"); + break; } + } - if (PlatformFlags & ELF::EF_MIPS_ARCH_ASE_M16) - Features.AddFeature("mips16"); - if (PlatformFlags & ELF::EF_MIPS_MICROMIPS) - Features.AddFeature("micromips"); + return Features; +} - return Features; - } +SubtargetFeatures ELFObjectFileBase::getFeatures() const { + switch (getEMachine()) { + case ELF::EM_MIPS: + return getMIPSFeatures(); + case ELF::EM_ARM: + return getARMFeatures(); default: return SubtargetFeatures(); } } -} // end namespace llvm +// FIXME Encode from a tablegen description or target parser. +void ELFObjectFileBase::setARMSubArch(Triple &TheTriple) const { + if (TheTriple.getSubArch() != Triple::NoSubArch) + return; + + ARMAttributeParser Attributes; + std::error_code EC = getBuildAttributes(Attributes); + if (EC) + return; + + std::string Triple; + // Default to ARM, but use the triple if it's been set. + if (TheTriple.getArch() == Triple::thumb || + TheTriple.getArch() == Triple::thumbeb) + Triple = "thumb"; + else + Triple = "arm"; + + if (Attributes.hasAttribute(ARMBuildAttrs::CPU_arch)) { + switch(Attributes.getAttributeValue(ARMBuildAttrs::CPU_arch)) { + case ARMBuildAttrs::v4: + Triple += "v4"; + break; + case ARMBuildAttrs::v4T: + Triple += "v4t"; + break; + case ARMBuildAttrs::v5T: + Triple += "v5t"; + break; + case ARMBuildAttrs::v5TE: + Triple += "v5te"; + break; + case ARMBuildAttrs::v5TEJ: + Triple += "v5tej"; + break; + case ARMBuildAttrs::v6: + Triple += "v6"; + break; + case ARMBuildAttrs::v6KZ: + Triple += "v6kz"; + break; + case ARMBuildAttrs::v6T2: + Triple += "v6t2"; + break; + case ARMBuildAttrs::v6K: + Triple += "v6k"; + break; + case ARMBuildAttrs::v7: + Triple += "v7"; + break; + case ARMBuildAttrs::v6_M: + Triple += "v6m"; + break; + case ARMBuildAttrs::v6S_M: + Triple += "v6sm"; + break; + case ARMBuildAttrs::v7E_M: + Triple += "v7em"; + break; + } + } + if (!isLittleEndian()) + Triple += "eb"; + + TheTriple.setArchName(Triple); +} |
