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cef81b37c7
On MachO, sections also have segment names. When a tool looking at a .o file prints a segment name, this is what they mean. In reality, a .o has only one anonymous, segment. This patch adds a MachO only function to fetch that segment name. I named it getSectionFinalSegmentName since the main use for the name seems to be inform the linker with segment this section should go to. The patch also changes MachOObjectFile::getSectionName to return just the section name instead of computing SegmentName,SectionName. The main difference from the previous patch is that it doesn't use InMemoryStruct. It is extremely dangerous: if the endians match it returns a pointer to the file buffer, if not, it returns a pointer to an internal buffer that is overwritten in the next API call. We should change all of this code to use support::detail::packed_endian_specific_integral like ELF, but since these functions only handle strings, they work with big and little endian machines as is. I have tested this by installing ubuntu 12.10 ppc on qemu, that is why it took so long :-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170838 91177308-0d34-0410-b5e6-96231b3b80d8
140 lines
6.3 KiB
C++
140 lines
6.3 KiB
C++
//===- MachO.h - MachO object file implementation ---------------*- 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 declares the MachOObjectFile class, which binds the MachOObject
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// class to the generic ObjectFile wrapper.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_OBJECT_MACHO_H
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#define LLVM_OBJECT_MACHO_H
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Object/MachOObject.h"
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#include "llvm/Object/ObjectFile.h"
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#include "llvm/Support/MachO.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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namespace object {
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typedef MachOObject::LoadCommandInfo LoadCommandInfo;
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class MachOObjectFile : public ObjectFile {
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public:
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MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO, error_code &ec);
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virtual symbol_iterator begin_symbols() const;
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virtual symbol_iterator end_symbols() const;
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virtual symbol_iterator begin_dynamic_symbols() const;
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virtual symbol_iterator end_dynamic_symbols() const;
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virtual library_iterator begin_libraries_needed() const;
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virtual library_iterator end_libraries_needed() const;
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virtual section_iterator begin_sections() const;
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virtual section_iterator end_sections() const;
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virtual uint8_t getBytesInAddress() const;
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virtual StringRef getFileFormatName() const;
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virtual unsigned getArch() const;
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virtual StringRef getLoadName() const;
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// In a MachO file, sections have a segment name. This is used in the .o
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// files. They have a single segment, but this field specifies which segment
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// a section should be put in in the final object.
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error_code getSectionFinalSegmentName(DataRefImpl Sec, StringRef &Res) const;
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MachOObject *getObject() { return MachOObj.get(); }
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static inline bool classof(const Binary *v) {
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return v->isMachO();
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}
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protected:
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virtual error_code getSymbolNext(DataRefImpl Symb, SymbolRef &Res) const;
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virtual error_code getSymbolName(DataRefImpl Symb, StringRef &Res) const;
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virtual error_code getSymbolFileOffset(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolAddress(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolSize(DataRefImpl Symb, uint64_t &Res) const;
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virtual error_code getSymbolNMTypeChar(DataRefImpl Symb, char &Res) const;
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virtual error_code getSymbolFlags(DataRefImpl Symb, uint32_t &Res) const;
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virtual error_code getSymbolType(DataRefImpl Symb, SymbolRef::Type &Res) const;
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virtual error_code getSymbolSection(DataRefImpl Symb,
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section_iterator &Res) const;
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virtual error_code getSymbolValue(DataRefImpl Symb, uint64_t &Val) const;
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virtual error_code getSectionNext(DataRefImpl Sec, SectionRef &Res) const;
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virtual error_code getSectionName(DataRefImpl Sec, StringRef &Res) const;
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virtual error_code getSectionAddress(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code getSectionSize(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code getSectionContents(DataRefImpl Sec, StringRef &Res) const;
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virtual error_code getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const;
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virtual error_code isSectionText(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionData(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionBSS(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionRequiredForExecution(DataRefImpl Sec,
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bool &Res) const;
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virtual error_code isSectionVirtual(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionZeroInit(DataRefImpl Sec, bool &Res) const;
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virtual error_code isSectionReadOnlyData(DataRefImpl Sec, bool &Res) const;
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virtual error_code sectionContainsSymbol(DataRefImpl DRI, DataRefImpl S,
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bool &Result) const;
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virtual relocation_iterator getSectionRelBegin(DataRefImpl Sec) const;
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virtual relocation_iterator getSectionRelEnd(DataRefImpl Sec) const;
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virtual error_code getRelocationNext(DataRefImpl Rel,
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RelocationRef &Res) const;
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virtual error_code getRelocationAddress(DataRefImpl Rel,
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uint64_t &Res) const;
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virtual error_code getRelocationOffset(DataRefImpl Rel,
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uint64_t &Res) const;
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virtual error_code getRelocationSymbol(DataRefImpl Rel,
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SymbolRef &Res) const;
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virtual error_code getRelocationType(DataRefImpl Rel,
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uint64_t &Res) const;
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virtual error_code getRelocationTypeName(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const;
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virtual error_code getRelocationAdditionalInfo(DataRefImpl Rel,
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int64_t &Res) const;
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virtual error_code getRelocationValueString(DataRefImpl Rel,
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SmallVectorImpl<char> &Result) const;
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virtual error_code getRelocationHidden(DataRefImpl Rel, bool &Result) const;
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virtual error_code getLibraryNext(DataRefImpl LibData, LibraryRef &Res) const;
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virtual error_code getLibraryPath(DataRefImpl LibData, StringRef &Res) const;
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private:
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OwningPtr<MachOObject> MachOObj;
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mutable uint32_t RegisteredStringTable;
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typedef SmallVector<DataRefImpl, 1> SectionList;
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SectionList Sections;
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void moveToNextSection(DataRefImpl &DRI) const;
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void getSymbolTableEntry(DataRefImpl DRI,
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InMemoryStruct<macho::SymbolTableEntry> &Res) const;
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void getSymbol64TableEntry(DataRefImpl DRI,
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InMemoryStruct<macho::Symbol64TableEntry> &Res) const;
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void moveToNextSymbol(DataRefImpl &DRI) const;
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void getSection(DataRefImpl DRI, InMemoryStruct<macho::Section> &Res) const;
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void getSection64(DataRefImpl DRI,
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InMemoryStruct<macho::Section64> &Res) const;
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void getRelocation(DataRefImpl Rel,
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InMemoryStruct<macho::RelocationEntry> &Res) const;
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std::size_t getSectionIndex(DataRefImpl Sec) const;
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void printRelocationTargetName(InMemoryStruct<macho::RelocationEntry>& RE,
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raw_string_ostream &fmt) const;
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};
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}
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}
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#endif
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