[XCOFF] Add functionality for parsing AIX XCOFF object file headers
Summary:
1. Add functionality for parsing AIX XCOFF object files headers.
2. Only support 32-bit AIX XCOFF object files in this patch.
3. Print out the AIX XCOFF object file header in YAML format.
Reviewers: sfertile, hubert.reinterpretcast, jasonliu, mstorsjo, zturner, rnk
Reviewed By: sfertile, hubert.reinterpretcast
Subscribers: jsji, mgorny, hiraditya, jdoerfert, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D59419
Patch by Digger Lin
llvm-svn: 357663
diff --git a/llvm/lib/Object/Binary.cpp b/llvm/lib/Object/Binary.cpp
index e1063a6..934fd53 100644
--- a/llvm/lib/Object/Binary.cpp
+++ b/llvm/lib/Object/Binary.cpp
@@ -69,6 +69,7 @@
case file_magic::coff_import_library:
case file_magic::pecoff_executable:
case file_magic::bitcode:
+ case file_magic::xcoff_object_32:
case file_magic::wasm_object:
return ObjectFile::createSymbolicFile(Buffer, Type, Context);
case file_magic::macho_universal_binary:
diff --git a/llvm/lib/Object/CMakeLists.txt b/llvm/lib/Object/CMakeLists.txt
index c9f7da9..242ae7e 100644
--- a/llvm/lib/Object/CMakeLists.txt
+++ b/llvm/lib/Object/CMakeLists.txt
@@ -23,6 +23,7 @@
SymbolSize.cpp
WasmObjectFile.cpp
WindowsResource.cpp
+ XCOFFObjectFile.cpp
ADDITIONAL_HEADER_DIRS
${LLVM_MAIN_INCLUDE_DIR}/llvm/Object
diff --git a/llvm/lib/Object/ObjectFile.cpp b/llvm/lib/Object/ObjectFile.cpp
index cf095db..081e29c 100644
--- a/llvm/lib/Object/ObjectFile.cpp
+++ b/llvm/lib/Object/ObjectFile.cpp
@@ -151,6 +151,8 @@
case file_magic::coff_import_library:
case file_magic::pecoff_executable:
return createCOFFObjectFile(Object);
+ case file_magic::xcoff_object_32:
+ return createXCOFFObjectFile(Object);
case file_magic::wasm_object:
return createWasmObjectFile(Object);
}
diff --git a/llvm/lib/Object/SymbolicFile.cpp b/llvm/lib/Object/SymbolicFile.cpp
index 675f209..1846196 100644
--- a/llvm/lib/Object/SymbolicFile.cpp
+++ b/llvm/lib/Object/SymbolicFile.cpp
@@ -69,6 +69,7 @@
case file_magic::macho_dsym_companion:
case file_magic::macho_kext_bundle:
case file_magic::pecoff_executable:
+ case file_magic::xcoff_object_32:
case file_magic::wasm_object:
return ObjectFile::createObjectFile(Object, Type);
case file_magic::coff_import_library:
diff --git a/llvm/lib/Object/XCOFFObjectFile.cpp b/llvm/lib/Object/XCOFFObjectFile.cpp
new file mode 100644
index 0000000..2903251
--- /dev/null
+++ b/llvm/lib/Object/XCOFFObjectFile.cpp
@@ -0,0 +1,270 @@
+//===--- XCOFFObjectFile.cpp - XCOFF object file implementation -----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the XCOFFObjectFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/XCOFFObjectFile.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/Support/BinaryStreamReader.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include <cstddef>
+#include <cstring>
+
+namespace llvm {
+namespace object {
+
+// Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
+// Returns unexpected_eof on error.
+template <typename T>
+static std::error_code getObject(const T *&Obj, MemoryBufferRef M,
+ const void *Ptr,
+ const uint64_t Size = sizeof(T)) {
+ uintptr_t Addr = uintptr_t(Ptr);
+ if (std::error_code EC = Binary::checkOffset(M, Addr, Size))
+ return EC;
+ Obj = reinterpret_cast<const T *>(Addr);
+ return std::error_code();
+}
+
+void XCOFFObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
+ llvm_unreachable("Not yet implemented!");
+ return;
+}
+
+Expected<StringRef> XCOFFObjectFile::getSymbolName(DataRefImpl Symb) const {
+ StringRef Result;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+Expected<uint64_t> XCOFFObjectFile::getSymbolAddress(DataRefImpl Symb) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+uint64_t XCOFFObjectFile::getSymbolValueImpl(DataRefImpl Symb) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+uint64_t XCOFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Symb) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+Expected<SymbolRef::Type>
+XCOFFObjectFile::getSymbolType(DataRefImpl Symb) const {
+ llvm_unreachable("Not yet implemented!");
+ return SymbolRef::ST_Other;
+}
+
+Expected<section_iterator>
+XCOFFObjectFile::getSymbolSection(DataRefImpl Symb) const {
+ llvm_unreachable("Not yet implemented!");
+ return section_iterator(SectionRef());
+}
+
+void XCOFFObjectFile::moveSectionNext(DataRefImpl &Sec) const {
+ llvm_unreachable("Not yet implemented!");
+ return;
+}
+
+std::error_code XCOFFObjectFile::getSectionName(DataRefImpl Sec,
+ StringRef &Res) const {
+ llvm_unreachable("Not yet implemented!");
+ return std::error_code();
+}
+
+uint64_t XCOFFObjectFile::getSectionAddress(DataRefImpl Sec) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+uint64_t XCOFFObjectFile::getSectionIndex(DataRefImpl Sec) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+uint64_t XCOFFObjectFile::getSectionSize(DataRefImpl Sec) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+std::error_code XCOFFObjectFile::getSectionContents(DataRefImpl Sec,
+ StringRef &Res) const {
+ llvm_unreachable("Not yet implemented!");
+ return std::error_code();
+}
+
+uint64_t XCOFFObjectFile::getSectionAlignment(DataRefImpl Sec) const {
+ uint64_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+bool XCOFFObjectFile::isSectionCompressed(DataRefImpl Sec) const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+bool XCOFFObjectFile::isSectionText(DataRefImpl Sec) const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+bool XCOFFObjectFile::isSectionData(DataRefImpl Sec) const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+bool XCOFFObjectFile::isSectionBSS(DataRefImpl Sec) const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+bool XCOFFObjectFile::isSectionVirtual(DataRefImpl Sec) const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+relocation_iterator XCOFFObjectFile::section_rel_begin(DataRefImpl Sec) const {
+ llvm_unreachable("Not yet implemented!");
+ return relocation_iterator(RelocationRef());
+}
+
+relocation_iterator XCOFFObjectFile::section_rel_end(DataRefImpl Sec) const {
+ llvm_unreachable("Not yet implemented!");
+ return relocation_iterator(RelocationRef());
+}
+
+void XCOFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
+ llvm_unreachable("Not yet implemented!");
+ return;
+}
+
+uint64_t XCOFFObjectFile::getRelocationOffset(DataRefImpl Rel) const {
+ llvm_unreachable("Not yet implemented!");
+ uint64_t Result = 0;
+ return Result;
+}
+
+symbol_iterator XCOFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
+ llvm_unreachable("Not yet implemented!");
+ return symbol_iterator(SymbolRef());
+}
+
+uint64_t XCOFFObjectFile::getRelocationType(DataRefImpl Rel) const {
+ llvm_unreachable("Not yet implemented!");
+ uint64_t Result = 0;
+ return Result;
+}
+
+void XCOFFObjectFile::getRelocationTypeName(
+ DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
+ llvm_unreachable("Not yet implemented!");
+ return;
+}
+
+uint32_t XCOFFObjectFile::getSymbolFlags(DataRefImpl Symb) const {
+ uint32_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+basic_symbol_iterator XCOFFObjectFile::symbol_begin() const {
+ llvm_unreachable("Not yet implemented!");
+ return basic_symbol_iterator(SymbolRef());
+}
+
+basic_symbol_iterator XCOFFObjectFile::symbol_end() const {
+ llvm_unreachable("Not yet implemented!");
+ return basic_symbol_iterator(SymbolRef());
+}
+
+section_iterator XCOFFObjectFile::section_begin() const {
+ llvm_unreachable("Not yet implemented!");
+ return section_iterator(SectionRef());
+}
+
+section_iterator XCOFFObjectFile::section_end() const {
+ llvm_unreachable("Not yet implemented!");
+ return section_iterator(SectionRef());
+}
+
+uint8_t XCOFFObjectFile::getBytesInAddress() const {
+ uint8_t Result = 0;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+StringRef XCOFFObjectFile::getFileFormatName() const {
+ llvm_unreachable("Not yet implemented!");
+ return "";
+}
+
+Triple::ArchType XCOFFObjectFile::getArch() const {
+ llvm_unreachable("Not yet implemented!");
+ return Triple::UnknownArch;
+}
+
+SubtargetFeatures XCOFFObjectFile::getFeatures() const {
+ llvm_unreachable("Not yet implemented!");
+ return SubtargetFeatures();
+}
+
+bool XCOFFObjectFile::isRelocatableObject() const {
+ bool Result = false;
+ llvm_unreachable("Not yet implemented!");
+ return Result;
+}
+
+XCOFFObjectFile::XCOFFObjectFile(MemoryBufferRef Object, std::error_code &EC)
+ : ObjectFile(Binary::ID_XCOFF32, Object) {
+
+ // Current location within the file.
+ uint64_t CurPtr = 0;
+
+ if ((EC = getObject(FileHdrPtr, Data, base() + CurPtr)))
+ return;
+}
+
+Expected<std::unique_ptr<ObjectFile>>
+ObjectFile::createXCOFFObjectFile(MemoryBufferRef Object) {
+ StringRef Data = Object.getBuffer();
+ file_magic Type = identify_magic(Data);
+ std::error_code EC;
+ std::unique_ptr<ObjectFile> Ret;
+
+ if (Type == file_magic::xcoff_object_32) {
+ Ret.reset(new XCOFFObjectFile(Object, EC));
+ } else {
+ llvm_unreachable("Encountered an unexpected binary file type!");
+ }
+
+ if (EC)
+ return errorCodeToError(EC);
+ return std::move(Ret);
+}
+
+} // namespace object
+} // namespace llvm