diff options
Diffstat (limited to 'lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp')
| -rw-r--r-- | lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp index bb388d45e36..76416843fd5 100644 --- a/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp +++ b/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp @@ -31,6 +31,7 @@ #include "llvm/ADT/PointerUnion.h" #include "llvm/ADT/StringRef.h" +#include "llvm/Support/ARMBuildAttributes.h" #include "llvm/Support/MathExtras.h" #define CASE_AND_STREAM(s, def, width) \ @@ -1516,6 +1517,93 @@ ObjectFileELF::RefineModuleDetailsFromNote (lldb_private::DataExtractor &data, l return error; } +void +ObjectFileELF::ParseARMAttributes(DataExtractor &data, uint64_t length, ArchSpec &arch_spec) +{ + lldb::offset_t Offset = 0; + + uint8_t FormatVersion = data.GetU8(&Offset); + if (FormatVersion != llvm::ARMBuildAttrs::Format_Version) + return; + + Offset = Offset + sizeof(uint32_t); // Section Length + llvm::StringRef VendorName = data.GetCStr(&Offset); + + if (VendorName != "aeabi") + return; + + if (arch_spec.GetTriple().getEnvironment() == llvm::Triple::UnknownEnvironment) + arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI); + + while (Offset < length) + { + uint8_t Tag = data.GetU8(&Offset); + uint32_t Size = data.GetU32(&Offset); + + if (Tag != llvm::ARMBuildAttrs::File || Size == 0) + continue; + + while (Offset < length) + { + uint64_t Tag = data.GetULEB128(&Offset); + switch (Tag) + { + default: + if (Tag < 32) + data.GetULEB128(&Offset); + else if (Tag % 2 == 0) + data.GetULEB128(&Offset); + else + data.GetCStr(&Offset); + + break; + + case llvm::ARMBuildAttrs::CPU_raw_name: + case llvm::ARMBuildAttrs::CPU_name: + data.GetCStr(&Offset); + + break; + + case llvm::ARMBuildAttrs::THUMB_ISA_use: + { + uint64_t ThumbISA = data.GetULEB128(&Offset); + + // NOTE: ignore ThumbISA == llvm::ARMBuildAttrs::AllowThumbDerived + // since that derives it based on the architecutre/profile + if (ThumbISA == llvm::ARMBuildAttrs::AllowThumb32) + if (arch_spec.GetTriple().getArch() == llvm::Triple::UnknownArch || + arch_spec.GetTriple().getArch() == llvm::Triple::arm) + arch_spec.GetTriple().setArch(llvm::Triple::thumb); + + break; + } + case llvm::ARMBuildAttrs::ABI_VFP_args: + { + uint64_t VFPArgs = data.GetULEB128(&Offset); + + if (VFPArgs == llvm::ARMBuildAttrs::BaseAAPCS) + { + if (arch_spec.GetTriple().getEnvironment() == llvm::Triple::UnknownEnvironment || + arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABIHF) + arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI); + + arch_spec.SetFlags(ArchSpec::eARM_abi_soft_float); + } + else if (VFPArgs == llvm::ARMBuildAttrs::HardFPAAPCS) + { + if (arch_spec.GetTriple().getEnvironment() == llvm::Triple::UnknownEnvironment || + arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABI) + arch_spec.GetTriple().setEnvironment(llvm::Triple::EABIHF); + + arch_spec.SetFlags(ArchSpec::eARM_abi_hard_float); + } + + break; + } + } + } + } +} //---------------------------------------------------------------------- // GetSectionHeaderInfo @@ -1648,6 +1736,18 @@ ObjectFileELF::GetSectionHeaderInfo(SectionHeaderColl §ion_headers, arch_spec.SetFlags (arch_flags); } + if (arch_spec.GetMachine() == llvm::Triple::arm || arch_spec.GetMachine() == llvm::Triple::thumb) + { + DataExtractor data; + + if (sheader.sh_type != SHT_ARM_ATTRIBUTES) + continue; + if (section_size == 0 || set_data(data, sheader.sh_offset, section_size) != section_size) + continue; + + ParseARMAttributes(data, section_size, arch_spec); + } + if (name == g_sect_name_gnu_debuglink) { DataExtractor data; |
