1 //===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a file format independent ObjectFile class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Object/COFF.h"
15 #include "llvm/Object/MachO.h"
16 #include "llvm/Object/ObjectFile.h"
17 #include "llvm/Support/ErrorHandling.h"
18 #include "llvm/Support/FileSystem.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <system_error>
24 using namespace object;
26 void ObjectFile::anchor() { }
28 ObjectFile::ObjectFile(unsigned int Type, MemoryBufferRef Source)
29 : SymbolicFile(Type, Source) {}
31 bool SectionRef::containsSymbol(SymbolRef S) const {
32 section_iterator SymSec = getObject()->section_end();
33 if (S.getSection(SymSec))
35 return *this == *SymSec;
38 std::error_code ObjectFile::printSymbolName(raw_ostream &OS,
39 DataRefImpl Symb) const {
40 ErrorOr<StringRef> Name = getSymbolName(Symb);
41 if (std::error_code EC = Name.getError())
44 return std::error_code();
47 uint32_t ObjectFile::getSymbolAlignment(DataRefImpl DRI) const { return 0; }
49 section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
50 return section_iterator(SectionRef(Sec, this));
53 ErrorOr<std::unique_ptr<ObjectFile>>
54 ObjectFile::createObjectFile(MemoryBufferRef Object, sys::fs::file_magic Type) {
55 StringRef Data = Object.getBuffer();
56 if (Type == sys::fs::file_magic::unknown)
57 Type = sys::fs::identify_magic(Data);
60 case sys::fs::file_magic::unknown:
61 case sys::fs::file_magic::bitcode:
62 case sys::fs::file_magic::archive:
63 case sys::fs::file_magic::macho_universal_binary:
64 case sys::fs::file_magic::windows_resource:
65 return object_error::invalid_file_type;
66 case sys::fs::file_magic::elf:
67 case sys::fs::file_magic::elf_relocatable:
68 case sys::fs::file_magic::elf_executable:
69 case sys::fs::file_magic::elf_shared_object:
70 case sys::fs::file_magic::elf_core:
71 return createELFObjectFile(Object);
72 case sys::fs::file_magic::macho_object:
73 case sys::fs::file_magic::macho_executable:
74 case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
75 case sys::fs::file_magic::macho_core:
76 case sys::fs::file_magic::macho_preload_executable:
77 case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
78 case sys::fs::file_magic::macho_dynamic_linker:
79 case sys::fs::file_magic::macho_bundle:
80 case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
81 case sys::fs::file_magic::macho_dsym_companion:
82 case sys::fs::file_magic::macho_kext_bundle:
83 return createMachOObjectFile(Object);
84 case sys::fs::file_magic::coff_object:
85 case sys::fs::file_magic::coff_import_library:
86 case sys::fs::file_magic::pecoff_executable:
87 return createCOFFObjectFile(Object);
89 llvm_unreachable("Unexpected Object File Type");
92 ErrorOr<OwningBinary<ObjectFile>>
93 ObjectFile::createObjectFile(StringRef ObjectPath) {
94 ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
95 MemoryBuffer::getFile(ObjectPath);
96 if (std::error_code EC = FileOrErr.getError())
98 std::unique_ptr<MemoryBuffer> Buffer = std::move(FileOrErr.get());
100 ErrorOr<std::unique_ptr<ObjectFile>> ObjOrErr =
101 createObjectFile(Buffer->getMemBufferRef());
102 if (std::error_code EC = ObjOrErr.getError())
104 std::unique_ptr<ObjectFile> Obj = std::move(ObjOrErr.get());
106 return OwningBinary<ObjectFile>(std::move(Obj), std::move(Buffer));