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59a0e79631
For regular object files this is only meaningful for common symbols. An object file format with direct support for atoms should be able to provide alignment information for all symbols. This replaces getCommonSymbolAlignment and fixes test-common-symbols-alignment.ll on darwin. This also includes a fix to MachOObjectFile::getSymbolFlags. It was marking undefined symbols as common (already tested by existing mcjit tests now that it is used). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180736 91177308-0d34-0410-b5e6-96231b3b80d8
73 lines
2.4 KiB
C++
73 lines
2.4 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/MemoryBuffer.h"
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#include "llvm/Support/Path.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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ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
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if (!Object || Object->getBufferSize() < 64)
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return 0;
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sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(),
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static_cast<unsigned>(Object->getBufferSize()));
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switch (type) {
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case sys::Unknown_FileType:
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return 0;
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case sys::ELF_Relocatable_FileType:
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case sys::ELF_Executable_FileType:
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case sys::ELF_SharedObject_FileType:
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case sys::ELF_Core_FileType:
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return createELFObjectFile(Object);
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case sys::Mach_O_Object_FileType:
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case sys::Mach_O_Executable_FileType:
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case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
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case sys::Mach_O_Core_FileType:
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case sys::Mach_O_PreloadExecutable_FileType:
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case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
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case sys::Mach_O_DynamicLinker_FileType:
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case sys::Mach_O_Bundle_FileType:
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case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
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case sys::Mach_O_DSYMCompanion_FileType:
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return createMachOObjectFile(Object);
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case sys::COFF_FileType:
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return createCOFFObjectFile(Object);
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default:
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llvm_unreachable("Unexpected Object File Type");
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}
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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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