mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
394be6c159
This format is simply a regular object file with the bitcode stored in a section named ".llvmbc", plus any number of other (non-allocated) sections. One immediate use case for this is to accommodate compilation processes which expect the object file to contain metadata in non-allocated sections, such as the ".go_export" section used by some Go compilers [1], although I imagine that in the future we could consider compiling parts of the module (such as large non-inlinable functions) directly into the object file to improve LTO efficiency. [1] http://golang.org/doc/install/gccgo#Imports Differential Revision: http://reviews.llvm.org/D4371 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218078 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
//===- SymbolicFile.cpp - Interface that only provides symbols --*- 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 SymbolicFile class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/IRObjectFile.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Object/SymbolicFile.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
|
|
using namespace llvm;
|
|
using namespace object;
|
|
|
|
SymbolicFile::SymbolicFile(unsigned int Type, MemoryBufferRef Source)
|
|
: Binary(Type, Source) {}
|
|
|
|
SymbolicFile::~SymbolicFile() {}
|
|
|
|
ErrorOr<std::unique_ptr<SymbolicFile>> SymbolicFile::createSymbolicFile(
|
|
MemoryBufferRef Object, sys::fs::file_magic Type, LLVMContext *Context) {
|
|
StringRef Data = Object.getBuffer();
|
|
if (Type == sys::fs::file_magic::unknown)
|
|
Type = sys::fs::identify_magic(Data);
|
|
|
|
switch (Type) {
|
|
case sys::fs::file_magic::bitcode:
|
|
if (Context)
|
|
return IRObjectFile::createIRObjectFile(Object, *Context);
|
|
// Fallthrough
|
|
case sys::fs::file_magic::unknown:
|
|
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_executable:
|
|
case sys::fs::file_magic::elf_shared_object:
|
|
case sys::fs::file_magic::elf_core:
|
|
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::coff_import_library:
|
|
case sys::fs::file_magic::pecoff_executable:
|
|
return ObjectFile::createObjectFile(Object, Type);
|
|
case sys::fs::file_magic::elf_relocatable:
|
|
case sys::fs::file_magic::macho_object:
|
|
case sys::fs::file_magic::coff_object: {
|
|
ErrorOr<std::unique_ptr<ObjectFile>> Obj =
|
|
ObjectFile::createObjectFile(Object, Type);
|
|
if (!Obj || !Context)
|
|
return std::move(Obj);
|
|
|
|
ErrorOr<MemoryBufferRef> BCData =
|
|
IRObjectFile::findBitcodeInObject(*Obj->get());
|
|
if (!BCData)
|
|
return std::move(Obj);
|
|
|
|
return IRObjectFile::createIRObjectFile(
|
|
MemoryBufferRef(BCData->getBuffer(), Object.getBufferIdentifier()),
|
|
*Context);
|
|
}
|
|
}
|
|
llvm_unreachable("Unexpected Binary File Type");
|
|
}
|