f785676f2a
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
//===- ObjectFile.cpp - File format independent object file -----*- C++ -*-===//
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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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// This file defines a file format independent ObjectFile class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/system_error.h"
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using namespace llvm;
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using namespace object;
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void ObjectFile::anchor() { }
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ObjectFile::ObjectFile(unsigned int Type, MemoryBuffer *source)
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: Binary(Type, source) {
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}
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error_code ObjectFile::getSymbolAlignment(DataRefImpl DRI,
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uint32_t &Result) const {
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Result = 0;
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return object_error::success;
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}
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section_iterator ObjectFile::getRelocatedSection(DataRefImpl Sec) const {
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return section_iterator(SectionRef(Sec, this));
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}
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ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
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if (Object->getBufferSize() < 64) {
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delete Object;
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return 0;
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}
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sys::fs::file_magic Type = sys::fs::identify_magic(Object->getBuffer());
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switch (Type) {
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case sys::fs::file_magic::unknown:
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case sys::fs::file_magic::bitcode:
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case sys::fs::file_magic::archive:
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case sys::fs::file_magic::macho_universal_binary:
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case sys::fs::file_magic::windows_resource:
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delete Object;
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return 0;
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case sys::fs::file_magic::elf_relocatable:
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case sys::fs::file_magic::elf_executable:
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case sys::fs::file_magic::elf_shared_object:
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case sys::fs::file_magic::elf_core:
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return createELFObjectFile(Object);
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case sys::fs::file_magic::macho_object:
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case sys::fs::file_magic::macho_executable:
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case sys::fs::file_magic::macho_fixed_virtual_memory_shared_lib:
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case sys::fs::file_magic::macho_core:
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case sys::fs::file_magic::macho_preload_executable:
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case sys::fs::file_magic::macho_dynamically_linked_shared_lib:
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case sys::fs::file_magic::macho_dynamic_linker:
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case sys::fs::file_magic::macho_bundle:
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case sys::fs::file_magic::macho_dynamically_linked_shared_lib_stub:
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case sys::fs::file_magic::macho_dsym_companion:
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return createMachOObjectFile(Object);
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case sys::fs::file_magic::coff_object:
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case sys::fs::file_magic::coff_import_library:
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case sys::fs::file_magic::pecoff_executable:
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return createCOFFObjectFile(Object);
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}
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llvm_unreachable("Unexpected Object File Type");
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}
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ObjectFile *ObjectFile::createObjectFile(StringRef ObjectPath) {
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OwningPtr<MemoryBuffer> File;
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if (MemoryBuffer::getFile(ObjectPath, File))
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return NULL;
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return createObjectFile(File.take());
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}
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