| //===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines a file format independent ObjectFile class. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Object/COFF.h" |
| #include "llvm/Object/MachO.h" |
| #include "llvm/Object/ObjectFile.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include <system_error> |
| |
| using namespace llvm; |
| using namespace object; |
| |
| void ObjectFile::anchor() { } |
| |
| ObjectFile::ObjectFile(unsigned int Type, MemoryBufferRef Source) |
| : SymbolicFile(Type, Source) {} |
| |
| bool SectionRef::containsSymbol(SymbolRef S) const { |
| ErrorOr<section_iterator> SymSec = S.getSection(); |
| if (!SymSec) |
| return false; |
| return *this == **SymSec; |
| } |
| |
| uint64_t ObjectFile::getSymbolValue(DataRefImpl Ref) const { |
| uint32_t Flags = getSymbolFlags(Ref); |
| if (Flags & SymbolRef::SF_Undefined) |
| return 0; |
| if (Flags & SymbolRef::SF_Common) |
| return getCommonSymbolSize(Ref); |
| return getSymbolValueImpl(Ref); |
| } |
| |
| std::error_code ObjectFile::printSymbolName(raw_ostream &OS, |
| DataRefImpl Symb) const { |
| ErrorOr<StringRef> Name = getSymbolName(Symb); |
| if (std::error_code EC = Name.getError()) |
| return EC; |
| OS << *Name; |
| return std::error_code(); |
| } |
| |
| uint32_t ObjectFile::getSymbolAlignment(DataRefImpl DRI) const { return 0; } |
| |
| section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const { |
| return section_iterator(SectionRef(Sec, this)); |
| } |
| |
| ErrorOr<std::unique_ptr<ObjectFile>> |
| ObjectFile::createObjectFile(MemoryBufferRef Object, sys::fs::file_magic Type) { |
| StringRef Data = Object.getBuffer(); |
| if (Type == sys::fs::file_magic::unknown) |
| Type = sys::fs::identify_magic(Data); |
| |
| switch (Type) { |
| case sys::fs::file_magic::unknown: |
| case sys::fs::file_magic::bitcode: |
| case sys::fs::file_magic::archive: |
| case sys::fs::file_magic::macho_universal_binary: |
| case sys::fs::file_magic::windows_resource: |
| return object_error::invalid_file_type; |
| case sys::fs::file_magic::elf: |
| case sys::fs::file_magic::elf_relocatable: |
| case sys::fs::file_magic::elf_executable: |
| case sys::fs::file_magic::elf_shared_object: |
| case sys::fs::file_magic::elf_core: |
| return createELFObjectFile(Object); |
| case sys::fs::file_magic::macho_object: |
| case sys::fs::file_magic::macho_executable: |
| case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib: |
| case sys::fs::file_magic::macho_core: |
| case sys::fs::file_magic::macho_preload_executable: |
| case sys::fs::file_magic::macho_dynamically_linked_shared_lib: |
| case sys::fs::file_magic::macho_dynamic_linker: |
| case sys::fs::file_magic::macho_bundle: |
| case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub: |
| case sys::fs::file_magic::macho_dsym_companion: |
| case sys::fs::file_magic::macho_kext_bundle: |
| return createMachOObjectFile(Object); |
| case sys::fs::file_magic::coff_object: |
| case sys::fs::file_magic::coff_import_library: |
| case sys::fs::file_magic::pecoff_executable: |
| return createCOFFObjectFile(Object); |
| } |
| llvm_unreachable("Unexpected Object File Type"); |
| } |
| |
| ErrorOr<OwningBinary<ObjectFile>> |
| ObjectFile::createObjectFile(StringRef ObjectPath) { |
| ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr = |
| MemoryBuffer::getFile(ObjectPath); |
| if (std::error_code EC = FileOrErr.getError()) |
| return EC; |
| std::unique_ptr<MemoryBuffer> Buffer = std::move(FileOrErr.get()); |
| |
| ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr = |
| createObjectFile(Buffer->getMemBufferRef()); |
| if (std::error_code EC = ObjOrErr.getError()) |
| return EC; |
| std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get()); |
| |
| return OwningBinary<ObjectFile>(std::move(Obj), std::move(Buffer)); |
| } |