[llvm-commits] [llvm] r119107 - in /llvm/trunk: CMakeLists.txt include/llvm/Object/ include/llvm/Object/ObjectFile.h lib/Makefile lib/Object/ lib/Object/CMakeLists.txt lib/Object/ObjectFile.cpp
Michael J. Spencer
bigcheesegs at gmail.com
Sun Nov 14 19:21:41 PST 2010
Author: mspencer
Date: Sun Nov 14 21:21:41 2010
New Revision: 119107
URL: http://llvm.org/viewvc/llvm-project?rev=119107&view=rev
Log:
Add LLVMObject Library.
Added:
llvm/trunk/include/llvm/Object/
llvm/trunk/include/llvm/Object/ObjectFile.h
llvm/trunk/lib/Object/
llvm/trunk/lib/Object/CMakeLists.txt
llvm/trunk/lib/Object/ObjectFile.cpp
Modified:
llvm/trunk/CMakeLists.txt
llvm/trunk/lib/Makefile
Modified: llvm/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/CMakeLists.txt?rev=119107&r1=119106&r2=119107&view=diff
==============================================================================
--- llvm/trunk/CMakeLists.txt (original)
+++ llvm/trunk/CMakeLists.txt Sun Nov 14 21:21:41 2010
@@ -315,6 +315,7 @@
add_subdirectory(lib/MC)
add_subdirectory(lib/MC/MCParser)
add_subdirectory(lib/MC/MCDisassembler)
+add_subdirectory(lib/Object)
add_subdirectory(utils/FileCheck)
add_subdirectory(utils/count)
Added: llvm/trunk/include/llvm/Object/ObjectFile.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Object/ObjectFile.h?rev=119107&view=auto
==============================================================================
--- llvm/trunk/include/llvm/Object/ObjectFile.h (added)
+++ llvm/trunk/include/llvm/Object/ObjectFile.h Sun Nov 14 21:21:41 2010
@@ -0,0 +1,248 @@
+//===- ObjectFile.h - File format independent object file -------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares a file format independent ObjectFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_OBJECT_FILE_H
+#define LLVM_OBJECT_OBJECT_FILE_H
+
+#include "llvm/ADT/Triple.h"
+#include "llvm/System/Path.h"
+
+namespace llvm {
+
+class MemoryBuffer;
+
+namespace object {
+
+class ObjectFile;
+typedef uint64_t DataRefImpl;
+
+/// SymbolRef - This is a value type class that represents a single symbol in
+/// the list of symbols in the object file.
+class SymbolRef {
+ DataRefImpl SymbolPimpl;
+ const ObjectFile *OwningObject;
+
+public:
+ SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner);
+
+ bool operator==(const SymbolRef &Other) const;
+
+ SymbolRef getNext() const;
+
+ StringRef getName() const;
+ uint64_t getAddress() const;
+ uint64_t getSize() const;
+
+ /// Returns the ascii char that should be displayed in a symbol table dump via
+ /// nm for this symbol.
+ char getNMTypeChar() const;
+
+ /// Returns true for symbols that are internal to the object file format such
+ /// as section symbols.
+ bool isInternal() const;
+};
+
+/// SectionRef - This is a value type class that represents a single section in
+/// the list of sections in the object file.
+class SectionRef {
+ DataRefImpl SectionPimpl;
+ const ObjectFile *OwningObject;
+
+public:
+ SectionRef(DataRefImpl SectionP, const ObjectFile *Owner);
+
+ bool operator==(const SectionRef &Other) const;
+
+ SectionRef getNext() const;
+
+ StringRef getName() const;
+ uint64_t getAddress() const;
+ uint64_t getSize() const;
+ StringRef getContents() const;
+
+ // FIXME: Move to the normalization layer when it's created.
+ bool isText() const;
+};
+
+const uint64_t UnknownAddressOrSize = ~0ULL;
+
+/// ObjectFile - This class is the base class for all object file types.
+/// Concrete instances of this object are created by createObjectFile, which
+/// figure out which type to create.
+class ObjectFile {
+private:
+ ObjectFile(); // = delete
+ ObjectFile(const ObjectFile &other); // = delete
+
+protected:
+ MemoryBuffer *MapFile;
+ const uint8_t *base;
+
+ ObjectFile(MemoryBuffer *Object);
+
+ // These functions are for SymbolRef to call internally. The main goal of
+ // this is to allow SymbolRef::SymbolPimpl to point directly to the symbol
+ // entry in the memory mapped object file. SymbolPimpl cannot contain any
+ // virtual functions because then it could not point into the memory mapped
+ // file.
+ friend class SymbolRef;
+ virtual SymbolRef getSymbolNext(DataRefImpl Symb) const = 0;
+ virtual StringRef getSymbolName(DataRefImpl Symb) const = 0;
+ virtual uint64_t getSymbolAddress(DataRefImpl Symb) const = 0;
+ virtual uint64_t getSymbolSize(DataRefImpl Symb) const = 0;
+ virtual char getSymbolNMTypeChar(DataRefImpl Symb) const = 0;
+ virtual bool isSymbolInternal(DataRefImpl Symb) const = 0;
+
+ // Same as above for SectionRef.
+ friend class SectionRef;
+ virtual SectionRef getSectionNext(DataRefImpl Sec) const = 0;
+ virtual StringRef getSectionName(DataRefImpl Sec) const = 0;
+ virtual uint64_t getSectionAddress(DataRefImpl Sec) const = 0;
+ virtual uint64_t getSectionSize(DataRefImpl Sec) const = 0;
+ virtual StringRef getSectionContents(DataRefImpl Sec) const = 0;
+ virtual bool isSectionText(DataRefImpl Sec) const = 0;
+
+
+public:
+ template<class content_type>
+ class content_iterator {
+ content_type Current;
+ public:
+ content_iterator(content_type symb)
+ : Current(symb) {}
+
+ const content_type* operator->() const {
+ return &Current;
+ }
+
+ bool operator==(const content_iterator &other) const {
+ return Current == other.Current;
+ }
+
+ bool operator!=(const content_iterator &other) const {
+ return !(*this == other);
+ }
+
+ content_iterator& operator++() { // Preincrement
+ Current = Current.getNext();
+ return *this;
+ }
+ };
+
+ typedef content_iterator<SymbolRef> symbol_iterator;
+ typedef content_iterator<SectionRef> section_iterator;
+
+ virtual ~ObjectFile();
+
+ virtual symbol_iterator begin_symbols() const = 0;
+ virtual symbol_iterator end_symbols() const = 0;
+
+ virtual section_iterator begin_sections() const = 0;
+ virtual section_iterator end_sections() const = 0;
+
+ /// @brief The number of bytes used to represent an address in this object
+ /// file format.
+ virtual uint8_t getBytesInAddress() const = 0;
+
+ virtual StringRef getFileFormatName() const = 0;
+ virtual Triple::ArchType getArch() const = 0;
+
+ StringRef getFilename() const;
+
+ /// @returns Pointer to ObjectFile subclass to handle this type of object.
+ /// @param ObjectPath The path to the object file. ObjectPath.isObject must
+ /// return true.
+ /// @brief Create ObjectFile from path.
+ static ObjectFile *createObjectFile(const sys::Path &ObjectPath);
+ static ObjectFile *createObjectFile(MemoryBuffer *Object);
+
+private:
+ static ObjectFile *createCOFFObjectFile(MemoryBuffer *Object);
+ static ObjectFile *createELFObjectFile(MemoryBuffer *Object);
+ static ObjectFile *createMachOObjectFile(MemoryBuffer *Object);
+ static ObjectFile *createArchiveObjectFile(MemoryBuffer *Object);
+ static ObjectFile *createLibObjectFile(MemoryBuffer *Object);
+};
+
+// Inline function definitions.
+inline SymbolRef::SymbolRef(DataRefImpl SymbolP, const ObjectFile *Owner)
+ : SymbolPimpl(SymbolP)
+ , OwningObject(Owner) {}
+
+inline bool SymbolRef::operator==(const SymbolRef &Other) const {
+ return SymbolPimpl == Other.SymbolPimpl;
+}
+
+inline SymbolRef SymbolRef::getNext() const {
+ return OwningObject->getSymbolNext(SymbolPimpl);
+}
+
+inline StringRef SymbolRef::getName() const {
+ return OwningObject->getSymbolName(SymbolPimpl);
+}
+
+inline uint64_t SymbolRef::getAddress() const {
+ return OwningObject->getSymbolAddress(SymbolPimpl);
+}
+
+inline uint64_t SymbolRef::getSize() const {
+ return OwningObject->getSymbolSize(SymbolPimpl);
+}
+
+inline char SymbolRef::getNMTypeChar() const {
+ return OwningObject->getSymbolNMTypeChar(SymbolPimpl);
+}
+
+inline bool SymbolRef::isInternal() const {
+ return OwningObject->isSymbolInternal(SymbolPimpl);
+}
+
+
+/// SectionRef
+inline SectionRef::SectionRef(DataRefImpl SectionP,
+ const ObjectFile *Owner)
+ : SectionPimpl(SectionP)
+ , OwningObject(Owner) {}
+
+inline bool SectionRef::operator==(const SectionRef &Other) const {
+ return SectionPimpl == Other.SectionPimpl;
+}
+
+inline SectionRef SectionRef::getNext() const {
+ return OwningObject->getSectionNext(SectionPimpl);
+}
+
+inline StringRef SectionRef::getName() const {
+ return OwningObject->getSectionName(SectionPimpl);
+}
+
+inline uint64_t SectionRef::getAddress() const {
+ return OwningObject->getSectionAddress(SectionPimpl);
+}
+
+inline uint64_t SectionRef::getSize() const {
+ return OwningObject->getSectionSize(SectionPimpl);
+}
+
+inline StringRef SectionRef::getContents() const {
+ return OwningObject->getSectionContents(SectionPimpl);
+}
+
+inline bool SectionRef::isText() const {
+ return OwningObject->isSectionText(SectionPimpl);
+}
+
+} // end namespace object
+} // end namespace llvm
+
+#endif
Modified: llvm/trunk/lib/Makefile
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Makefile?rev=119107&r1=119106&r2=119107&view=diff
==============================================================================
--- llvm/trunk/lib/Makefile (original)
+++ llvm/trunk/lib/Makefile Sun Nov 14 21:21:41 2010
@@ -11,7 +11,7 @@
include $(LEVEL)/Makefile.config
PARALLEL_DIRS := VMCore AsmParser Bitcode Archive Analysis Transforms CodeGen \
- Target ExecutionEngine Linker MC CompilerDriver
+ Target ExecutionEngine Linker MC CompilerDriver Object
include $(LEVEL)/Makefile.common
Added: llvm/trunk/lib/Object/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Object/CMakeLists.txt?rev=119107&view=auto
==============================================================================
--- llvm/trunk/lib/Object/CMakeLists.txt (added)
+++ llvm/trunk/lib/Object/CMakeLists.txt Sun Nov 14 21:21:41 2010
@@ -0,0 +1,3 @@
+add_llvm_library(LLVMObject
+ ObjectFile.cpp
+ )
Added: llvm/trunk/lib/Object/ObjectFile.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Object/ObjectFile.cpp?rev=119107&view=auto
==============================================================================
--- llvm/trunk/lib/Object/ObjectFile.cpp (added)
+++ llvm/trunk/lib/Object/ObjectFile.cpp Sun Nov 14 21:21:41 2010
@@ -0,0 +1,68 @@
+//===- ObjectFile.cpp - File format independent object file -----*- 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 ObjectFile class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+namespace llvm {
+namespace object {
+
+ObjectFile::ObjectFile(MemoryBuffer *Object)
+ : MapFile(Object) {
+ assert(MapFile && "Must be a valid MemoryBuffer!");
+ base = reinterpret_cast<const uint8_t *>(MapFile->getBufferStart());
+}
+
+ObjectFile::~ObjectFile() {
+ delete MapFile;
+}
+
+StringRef ObjectFile::getFilename() const {
+ return MapFile->getBufferIdentifier();
+}
+
+ObjectFile *ObjectFile::createObjectFile(MemoryBuffer *Object) {
+ if (!Object || Object->getBufferSize() < 64)
+ return 0;
+ sys::LLVMFileType type = sys::IdentifyFileType(Object->getBufferStart(),
+ static_cast<unsigned>(Object->getBufferSize()));
+ switch (type) {
+ case sys::ELF_Relocatable_FileType:
+ case sys::ELF_Executable_FileType:
+ case sys::ELF_SharedObject_FileType:
+ case sys::ELF_Core_FileType:
+ return 0;
+ case sys::Mach_O_Object_FileType:
+ case sys::Mach_O_Executable_FileType:
+ case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
+ case sys::Mach_O_Core_FileType:
+ case sys::Mach_O_PreloadExectuable_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
+ case sys::Mach_O_DynamicLinker_FileType:
+ case sys::Mach_O_Bundle_FileType:
+ case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
+ return 0;
+ case sys::COFF_FileType:
+ return 0;
+ default:
+ llvm_unreachable("Unknown Object File Type");
+ }
+}
+
+ObjectFile *ObjectFile::createObjectFile(const sys::Path &ObjectPath) {
+ return createObjectFile(MemoryBuffer::getFile(ObjectPath.c_str()));
+}
+
+} // end namespace object
+} // end namespace llvm
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