forked from OSchip/llvm-project
1606 lines
46 KiB
C++
1606 lines
46 KiB
C++
//===- MachOObjectFile.cpp - Mach-O object file binding ---------*- 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 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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#include "llvm/Object/MachO.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Support/DataExtractor.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cctype>
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#include <cstring>
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#include <limits>
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using namespace llvm;
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using namespace object;
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namespace llvm {
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namespace object {
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struct nlist_base {
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uint32_t n_strx;
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uint8_t n_type;
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uint8_t n_sect;
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uint16_t n_desc;
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};
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struct section_base {
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char sectname[16];
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char segname[16];
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};
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template<typename T>
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static void SwapValue(T &Value) {
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Value = sys::SwapByteOrder(Value);
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}
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template<typename T>
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static void SwapStruct(T &Value);
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template<>
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void SwapStruct(MachO::any_relocation_info &H) {
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SwapValue(H.r_word0);
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SwapValue(H.r_word1);
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}
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template<>
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void SwapStruct(MachO::load_command &L) {
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SwapValue(L.cmd);
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SwapValue(L.cmdsize);
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}
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template<>
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void SwapStruct(nlist_base &S) {
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SwapValue(S.n_strx);
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SwapValue(S.n_desc);
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}
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template<>
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void SwapStruct(MachO::section &S) {
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SwapValue(S.addr);
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SwapValue(S.size);
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SwapValue(S.offset);
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SwapValue(S.align);
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SwapValue(S.reloff);
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SwapValue(S.nreloc);
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SwapValue(S.flags);
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SwapValue(S.reserved1);
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SwapValue(S.reserved2);
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}
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template<>
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void SwapStruct(MachO::section_64 &S) {
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SwapValue(S.addr);
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SwapValue(S.size);
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SwapValue(S.offset);
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SwapValue(S.align);
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SwapValue(S.reloff);
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SwapValue(S.nreloc);
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SwapValue(S.flags);
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SwapValue(S.reserved1);
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SwapValue(S.reserved2);
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SwapValue(S.reserved3);
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}
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template<>
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void SwapStruct(MachO::nlist &S) {
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SwapValue(S.n_strx);
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SwapValue(S.n_desc);
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SwapValue(S.n_value);
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}
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template<>
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void SwapStruct(MachO::nlist_64 &S) {
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SwapValue(S.n_strx);
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SwapValue(S.n_desc);
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SwapValue(S.n_value);
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}
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template<>
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void SwapStruct(MachO::mach_header &H) {
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SwapValue(H.magic);
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SwapValue(H.cputype);
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SwapValue(H.cpusubtype);
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SwapValue(H.filetype);
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SwapValue(H.ncmds);
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SwapValue(H.sizeofcmds);
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SwapValue(H.flags);
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}
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template<>
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void SwapStruct(MachO::mach_header_64 &H) {
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SwapValue(H.magic);
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SwapValue(H.cputype);
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SwapValue(H.cpusubtype);
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SwapValue(H.filetype);
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SwapValue(H.ncmds);
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SwapValue(H.sizeofcmds);
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SwapValue(H.flags);
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SwapValue(H.reserved);
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}
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template<>
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void SwapStruct(MachO::symtab_command &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.symoff);
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SwapValue(C.nsyms);
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SwapValue(C.stroff);
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SwapValue(C.strsize);
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}
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template<>
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void SwapStruct(MachO::dysymtab_command &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.ilocalsym);
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SwapValue(C.nlocalsym);
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SwapValue(C.iextdefsym);
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SwapValue(C.nextdefsym);
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SwapValue(C.iundefsym);
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SwapValue(C.nundefsym);
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SwapValue(C.tocoff);
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SwapValue(C.ntoc);
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SwapValue(C.modtaboff);
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SwapValue(C.nmodtab);
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SwapValue(C.extrefsymoff);
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SwapValue(C.nextrefsyms);
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SwapValue(C.indirectsymoff);
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SwapValue(C.nindirectsyms);
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SwapValue(C.extreloff);
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SwapValue(C.nextrel);
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SwapValue(C.locreloff);
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SwapValue(C.nlocrel);
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}
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template<>
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void SwapStruct(MachO::linkedit_data_command &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.dataoff);
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SwapValue(C.datasize);
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}
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template<>
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void SwapStruct(MachO::segment_command &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.vmaddr);
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SwapValue(C.vmsize);
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SwapValue(C.fileoff);
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SwapValue(C.filesize);
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SwapValue(C.maxprot);
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SwapValue(C.initprot);
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SwapValue(C.nsects);
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SwapValue(C.flags);
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}
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template<>
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void SwapStruct(MachO::segment_command_64 &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.vmaddr);
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SwapValue(C.vmsize);
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SwapValue(C.fileoff);
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SwapValue(C.filesize);
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SwapValue(C.maxprot);
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SwapValue(C.initprot);
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SwapValue(C.nsects);
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SwapValue(C.flags);
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}
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template<>
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void SwapStruct(uint32_t &C) {
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SwapValue(C);
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}
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template<>
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void SwapStruct(MachO::linker_options_command &C) {
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SwapValue(C.cmd);
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SwapValue(C.cmdsize);
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SwapValue(C.count);
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}
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template<>
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void SwapStruct(MachO::data_in_code_entry &C) {
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SwapValue(C.offset);
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SwapValue(C.length);
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SwapValue(C.kind);
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}
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template<typename T>
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T getStruct(const MachOObjectFile *O, const char *P) {
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T Cmd;
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memcpy(&Cmd, P, sizeof(T));
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if (O->isLittleEndian() != sys::IsLittleEndianHost)
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SwapStruct(Cmd);
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return Cmd;
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}
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static uint32_t
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getSegmentLoadCommandNumSections(const MachOObjectFile *O,
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const MachOObjectFile::LoadCommandInfo &L) {
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if (O->is64Bit()) {
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MachO::segment_command_64 S = O->getSegment64LoadCommand(L);
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return S.nsects;
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}
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MachO::segment_command S = O->getSegmentLoadCommand(L);
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return S.nsects;
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}
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static const char *
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getSectionPtr(const MachOObjectFile *O, MachOObjectFile::LoadCommandInfo L,
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unsigned Sec) {
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uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(L.Ptr);
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bool Is64 = O->is64Bit();
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unsigned SegmentLoadSize = Is64 ? sizeof(MachO::segment_command_64) :
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sizeof(MachO::segment_command);
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unsigned SectionSize = Is64 ? sizeof(MachO::section_64) :
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sizeof(MachO::section);
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uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + Sec * SectionSize;
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return reinterpret_cast<const char*>(SectionAddr);
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}
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static const char *getPtr(const MachOObjectFile *O, size_t Offset) {
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return O->getData().substr(Offset, 1).data();
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}
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static nlist_base
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getSymbolTableEntryBase(const MachOObjectFile *O, DataRefImpl DRI) {
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const char *P = reinterpret_cast<const char *>(DRI.p);
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return getStruct<nlist_base>(O, P);
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}
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static StringRef parseSegmentOrSectionName(const char *P) {
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if (P[15] == 0)
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// Null terminated.
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return P;
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// Not null terminated, so this is a 16 char string.
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return StringRef(P, 16);
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}
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// Helper to advance a section or symbol iterator multiple increments at a time.
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template<class T>
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static error_code advance(T &it, size_t Val) {
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error_code ec;
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while (Val--) {
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it.increment(ec);
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}
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return ec;
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}
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template<class T>
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static void advanceTo(T &it, size_t Val) {
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if (error_code ec = advance(it, Val))
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report_fatal_error(ec.message());
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}
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static unsigned getCPUType(const MachOObjectFile *O) {
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return O->getHeader().cputype;
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}
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static void printRelocationTargetName(const MachOObjectFile *O,
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const MachO::any_relocation_info &RE,
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raw_string_ostream &fmt) {
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bool IsScattered = O->isRelocationScattered(RE);
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// Target of a scattered relocation is an address. In the interest of
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// generating pretty output, scan through the symbol table looking for a
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// symbol that aligns with that address. If we find one, print it.
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// Otherwise, we just print the hex address of the target.
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if (IsScattered) {
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uint32_t Val = O->getPlainRelocationSymbolNum(RE);
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error_code ec;
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for (symbol_iterator SI = O->begin_symbols(), SE = O->end_symbols();
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SI != SE; SI.increment(ec)) {
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if (ec) report_fatal_error(ec.message());
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uint64_t Addr;
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StringRef Name;
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if ((ec = SI->getAddress(Addr)))
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report_fatal_error(ec.message());
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if (Addr != Val) continue;
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if ((ec = SI->getName(Name)))
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report_fatal_error(ec.message());
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fmt << Name;
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return;
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}
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// If we couldn't find a symbol that this relocation refers to, try
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// to find a section beginning instead.
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for (section_iterator SI = O->begin_sections(), SE = O->end_sections();
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SI != SE; SI.increment(ec)) {
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if (ec) report_fatal_error(ec.message());
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uint64_t Addr;
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StringRef Name;
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if ((ec = SI->getAddress(Addr)))
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report_fatal_error(ec.message());
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if (Addr != Val) continue;
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if ((ec = SI->getName(Name)))
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report_fatal_error(ec.message());
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fmt << Name;
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return;
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}
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fmt << format("0x%x", Val);
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return;
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}
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StringRef S;
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bool isExtern = O->getPlainRelocationExternal(RE);
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uint64_t Val = O->getPlainRelocationSymbolNum(RE);
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if (isExtern) {
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symbol_iterator SI = O->begin_symbols();
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advanceTo(SI, Val);
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SI->getName(S);
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} else {
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section_iterator SI = O->begin_sections();
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// Adjust for the fact that sections are 1-indexed.
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advanceTo(SI, Val - 1);
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SI->getName(S);
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}
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fmt << S;
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}
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static uint32_t
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getPlainRelocationAddress(const MachO::any_relocation_info &RE) {
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return RE.r_word0;
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}
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static unsigned
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getScatteredRelocationAddress(const MachO::any_relocation_info &RE) {
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return RE.r_word0 & 0xffffff;
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}
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static bool getPlainRelocationPCRel(const MachOObjectFile *O,
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const MachO::any_relocation_info &RE) {
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if (O->isLittleEndian())
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return (RE.r_word1 >> 24) & 1;
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return (RE.r_word1 >> 7) & 1;
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}
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static bool
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getScatteredRelocationPCRel(const MachOObjectFile *O,
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const MachO::any_relocation_info &RE) {
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return (RE.r_word0 >> 30) & 1;
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}
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static unsigned getPlainRelocationLength(const MachOObjectFile *O,
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const MachO::any_relocation_info &RE) {
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if (O->isLittleEndian())
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return (RE.r_word1 >> 25) & 3;
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return (RE.r_word1 >> 5) & 3;
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}
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static unsigned
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getScatteredRelocationLength(const MachO::any_relocation_info &RE) {
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return (RE.r_word0 >> 28) & 3;
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}
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static unsigned getPlainRelocationType(const MachOObjectFile *O,
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const MachO::any_relocation_info &RE) {
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if (O->isLittleEndian())
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return RE.r_word1 >> 28;
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return RE.r_word1 & 0xf;
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}
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static unsigned
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getScatteredRelocationType(const MachO::any_relocation_info &RE) {
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return (RE.r_word0 >> 24) & 0xf;
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}
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static uint32_t getSectionFlags(const MachOObjectFile *O,
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DataRefImpl Sec) {
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if (O->is64Bit()) {
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MachO::section_64 Sect = O->getSection64(Sec);
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return Sect.flags;
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}
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MachO::section Sect = O->getSection(Sec);
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return Sect.flags;
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}
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MachOObjectFile::MachOObjectFile(MemoryBuffer *Object,
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bool IsLittleEndian, bool Is64bits,
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error_code &ec)
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: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object),
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SymtabLoadCmd(NULL), DysymtabLoadCmd(NULL), DataInCodeLoadCmd(NULL) {
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uint32_t LoadCommandCount = this->getHeader().ncmds;
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MachO::LoadCommandType SegmentLoadType = is64Bit() ?
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MachO::LC_SEGMENT_64 : MachO::LC_SEGMENT;
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MachOObjectFile::LoadCommandInfo Load = getFirstLoadCommandInfo();
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for (unsigned I = 0; ; ++I) {
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if (Load.C.cmd == MachO::LC_SYMTAB) {
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assert(!SymtabLoadCmd && "Multiple symbol tables");
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SymtabLoadCmd = Load.Ptr;
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} else if (Load.C.cmd == MachO::LC_DYSYMTAB) {
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assert(!DysymtabLoadCmd && "Multiple dynamic symbol tables");
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DysymtabLoadCmd = Load.Ptr;
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} else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
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assert(!DataInCodeLoadCmd && "Multiple data in code tables");
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DataInCodeLoadCmd = Load.Ptr;
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} else if (Load.C.cmd == SegmentLoadType) {
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uint32_t NumSections = getSegmentLoadCommandNumSections(this, Load);
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for (unsigned J = 0; J < NumSections; ++J) {
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const char *Sec = getSectionPtr(this, Load, J);
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Sections.push_back(Sec);
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}
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}
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if (I == LoadCommandCount - 1)
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break;
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else
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Load = getNextLoadCommandInfo(Load);
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}
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}
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error_code MachOObjectFile::getSymbolNext(DataRefImpl Symb,
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SymbolRef &Res) const {
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unsigned SymbolTableEntrySize = is64Bit() ?
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sizeof(MachO::nlist_64) :
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sizeof(MachO::nlist);
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Symb.p += SymbolTableEntrySize;
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Res = SymbolRef(Symb, this);
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolName(DataRefImpl Symb,
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StringRef &Res) const {
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StringRef StringTable = getStringTableData();
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nlist_base Entry = getSymbolTableEntryBase(this, Symb);
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const char *Start = &StringTable.data()[Entry.n_strx];
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Res = StringRef(Start);
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolAddress(DataRefImpl Symb,
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uint64_t &Res) const {
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if (is64Bit()) {
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MachO::nlist_64 Entry = getSymbol64TableEntry(Symb);
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Res = Entry.n_value;
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} else {
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MachO::nlist Entry = getSymbolTableEntry(Symb);
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Res = Entry.n_value;
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}
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return object_error::success;
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}
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error_code
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MachOObjectFile::getSymbolFileOffset(DataRefImpl Symb,
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uint64_t &Res) const {
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nlist_base Entry = getSymbolTableEntryBase(this, Symb);
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getSymbolAddress(Symb, Res);
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if (Entry.n_sect) {
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uint64_t Delta;
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DataRefImpl SecRel;
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SecRel.d.a = Entry.n_sect-1;
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if (is64Bit()) {
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MachO::section_64 Sec = getSection64(SecRel);
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Delta = Sec.offset - Sec.addr;
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} else {
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MachO::section Sec = getSection(SecRel);
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Delta = Sec.offset - Sec.addr;
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}
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Res += Delta;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolAlignment(DataRefImpl DRI,
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uint32_t &Result) const {
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uint32_t flags;
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this->getSymbolFlags(DRI, flags);
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if (flags & SymbolRef::SF_Common) {
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nlist_base Entry = getSymbolTableEntryBase(this, DRI);
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Result = 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
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} else {
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Result = 0;
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|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
|
|
uint64_t &Result) const {
|
|
uint64_t BeginOffset;
|
|
uint64_t EndOffset = 0;
|
|
uint8_t SectionIndex;
|
|
|
|
nlist_base Entry = getSymbolTableEntryBase(this, DRI);
|
|
uint64_t Value;
|
|
getSymbolAddress(DRI, Value);
|
|
|
|
BeginOffset = Value;
|
|
|
|
SectionIndex = Entry.n_sect;
|
|
if (!SectionIndex) {
|
|
uint32_t flags = SymbolRef::SF_None;
|
|
this->getSymbolFlags(DRI, flags);
|
|
if (flags & SymbolRef::SF_Common)
|
|
Result = Value;
|
|
else
|
|
Result = UnknownAddressOrSize;
|
|
return object_error::success;
|
|
}
|
|
// Unfortunately symbols are unsorted so we need to touch all
|
|
// symbols from load command
|
|
error_code ec;
|
|
for (symbol_iterator I = begin_symbols(), E = end_symbols(); I != E;
|
|
I.increment(ec)) {
|
|
DataRefImpl DRI = I->getRawDataRefImpl();
|
|
Entry = getSymbolTableEntryBase(this, DRI);
|
|
getSymbolAddress(DRI, Value);
|
|
if (Entry.n_sect == SectionIndex && Value > BeginOffset)
|
|
if (!EndOffset || Value < EndOffset)
|
|
EndOffset = Value;
|
|
}
|
|
if (!EndOffset) {
|
|
uint64_t Size;
|
|
DataRefImpl Sec;
|
|
Sec.d.a = SectionIndex-1;
|
|
getSectionSize(Sec, Size);
|
|
getSectionAddress(Sec, EndOffset);
|
|
EndOffset += Size;
|
|
}
|
|
Result = EndOffset - BeginOffset;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
|
|
SymbolRef::Type &Res) const {
|
|
nlist_base Entry = getSymbolTableEntryBase(this, Symb);
|
|
uint8_t n_type = Entry.n_type;
|
|
|
|
Res = SymbolRef::ST_Other;
|
|
|
|
// If this is a STAB debugging symbol, we can do nothing more.
|
|
if (n_type & MachO::N_STAB) {
|
|
Res = SymbolRef::ST_Debug;
|
|
return object_error::success;
|
|
}
|
|
|
|
switch (n_type & MachO::N_TYPE) {
|
|
case MachO::N_UNDF :
|
|
Res = SymbolRef::ST_Unknown;
|
|
break;
|
|
case MachO::N_SECT :
|
|
Res = SymbolRef::ST_Function;
|
|
break;
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getSymbolFlags(DataRefImpl DRI,
|
|
uint32_t &Result) const {
|
|
nlist_base Entry = getSymbolTableEntryBase(this, DRI);
|
|
|
|
uint8_t MachOType = Entry.n_type;
|
|
uint16_t MachOFlags = Entry.n_desc;
|
|
|
|
// TODO: Correctly set SF_ThreadLocal
|
|
Result = SymbolRef::SF_None;
|
|
|
|
if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF)
|
|
Result |= SymbolRef::SF_Undefined;
|
|
|
|
if (MachOType & MachO::N_STAB)
|
|
Result |= SymbolRef::SF_FormatSpecific;
|
|
|
|
if (MachOType & MachO::N_EXT) {
|
|
Result |= SymbolRef::SF_Global;
|
|
if ((MachOType & MachO::N_TYPE) == MachO::N_UNDF) {
|
|
uint64_t Value;
|
|
getSymbolAddress(DRI, Value);
|
|
if (Value)
|
|
Result |= SymbolRef::SF_Common;
|
|
}
|
|
}
|
|
|
|
if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
|
|
Result |= SymbolRef::SF_Weak;
|
|
|
|
if ((MachOType & MachO::N_TYPE) == MachO::N_ABS)
|
|
Result |= SymbolRef::SF_Absolute;
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSymbolSection(DataRefImpl Symb,
|
|
section_iterator &Res) const {
|
|
nlist_base Entry = getSymbolTableEntryBase(this, Symb);
|
|
uint8_t index = Entry.n_sect;
|
|
|
|
if (index == 0) {
|
|
Res = end_sections();
|
|
} else {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = index - 1;
|
|
Res = section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getSymbolValue(DataRefImpl Symb,
|
|
uint64_t &Val) const {
|
|
report_fatal_error("getSymbolValue unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
error_code MachOObjectFile::getSectionNext(DataRefImpl Sec,
|
|
SectionRef &Res) const {
|
|
Sec.d.a++;
|
|
Res = SectionRef(Sec, this);
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSectionName(DataRefImpl Sec, StringRef &Result) const {
|
|
ArrayRef<char> Raw = getSectionRawName(Sec);
|
|
Result = parseSegmentOrSectionName(Raw.data());
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSectionAddress(DataRefImpl Sec, uint64_t &Res) const {
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Res = Sect.addr;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Res = Sect.addr;
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSectionSize(DataRefImpl Sec, uint64_t &Res) const {
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Res = Sect.size;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Res = Sect.size;
|
|
}
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSectionContents(DataRefImpl Sec, StringRef &Res) const {
|
|
uint32_t Offset;
|
|
uint64_t Size;
|
|
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Offset = Sect.offset;
|
|
Size = Sect.size;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Offset = Sect.offset;
|
|
Size = Sect.size;
|
|
}
|
|
|
|
Res = this->getData().substr(Offset, Size);
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getSectionAlignment(DataRefImpl Sec, uint64_t &Res) const {
|
|
uint32_t Align;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Align = Sect.align;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Align = Sect.align;
|
|
}
|
|
|
|
Res = uint64_t(1) << Align;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::isSectionText(DataRefImpl Sec, bool &Res) const {
|
|
uint32_t Flags = getSectionFlags(this, Sec);
|
|
Res = Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionData(DataRefImpl DRI, bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionBSS(DataRefImpl DRI, bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::isSectionRequiredForExecution(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = true;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionVirtual(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::isSectionZeroInit(DataRefImpl Sec, bool &Res) const {
|
|
uint32_t Flags = getSectionFlags(this, Sec);
|
|
unsigned SectionType = Flags & MachO::SECTION_TYPE;
|
|
Res = SectionType == MachO::S_ZEROFILL ||
|
|
SectionType == MachO::S_GB_ZEROFILL;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionReadOnlyData(DataRefImpl Sec,
|
|
bool &Result) const {
|
|
// Consider using the code from isSectionText to look for __const sections.
|
|
// Alternately, emit S_ATTR_PURE_INSTRUCTIONS and/or S_ATTR_SOME_INSTRUCTIONS
|
|
// to use section attributes to distinguish code from data.
|
|
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec, DataRefImpl Symb,
|
|
bool &Result) const {
|
|
SymbolRef::Type ST;
|
|
this->getSymbolType(Symb, ST);
|
|
if (ST == SymbolRef::ST_Unknown) {
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
uint64_t SectBegin, SectEnd;
|
|
getSectionAddress(Sec, SectBegin);
|
|
getSectionSize(Sec, SectEnd);
|
|
SectEnd += SectBegin;
|
|
|
|
uint64_t SymAddr;
|
|
getSymbolAddress(Symb, SymAddr);
|
|
Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
|
|
uint32_t Offset;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Offset = Sect.reloff;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Offset = Sect.reloff;
|
|
}
|
|
|
|
DataRefImpl Ret;
|
|
Ret.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator
|
|
MachOObjectFile::section_rel_end(DataRefImpl Sec) const {
|
|
uint32_t Offset;
|
|
uint32_t Num;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Offset = Sect.reloff;
|
|
Num = Sect.nreloc;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Offset = Sect.reloff;
|
|
Num = Sect.nreloc;
|
|
}
|
|
|
|
const MachO::any_relocation_info *P =
|
|
reinterpret_cast<const MachO::any_relocation_info *>(getPtr(this, Offset));
|
|
|
|
DataRefImpl Ret;
|
|
Ret.p = reinterpret_cast<uintptr_t>(P + Num);
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
error_code MachOObjectFile::getRelocationNext(DataRefImpl Rel,
|
|
RelocationRef &Res) const {
|
|
const MachO::any_relocation_info *P =
|
|
reinterpret_cast<const MachO::any_relocation_info *>(Rel.p);
|
|
Rel.p = reinterpret_cast<uintptr_t>(P + 1);
|
|
Res = RelocationRef(Rel, this);
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getRelocationAddress(DataRefImpl Rel, uint64_t &Res) const {
|
|
report_fatal_error("getRelocationAddress not implemented in MachOObjectFile");
|
|
}
|
|
|
|
error_code MachOObjectFile::getRelocationOffset(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
Res = getAnyRelocationAddress(RE);
|
|
return object_error::success;
|
|
}
|
|
|
|
symbol_iterator
|
|
MachOObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
uint32_t SymbolIdx = getPlainRelocationSymbolNum(RE);
|
|
bool isExtern = getPlainRelocationExternal(RE);
|
|
if (!isExtern)
|
|
return end_symbols();
|
|
|
|
MachO::symtab_command S = getSymtabLoadCommand();
|
|
unsigned SymbolTableEntrySize = is64Bit() ?
|
|
sizeof(MachO::nlist_64) :
|
|
sizeof(MachO::nlist);
|
|
uint64_t Offset = S.symoff + SymbolIdx * SymbolTableEntrySize;
|
|
DataRefImpl Sym;
|
|
Sym.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
|
|
return symbol_iterator(SymbolRef(Sym, this));
|
|
}
|
|
|
|
error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
Res = getAnyRelocationType(RE);
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getRelocationTypeName(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
StringRef res;
|
|
uint64_t RType;
|
|
getRelocationType(Rel, RType);
|
|
|
|
unsigned Arch = this->getArch();
|
|
|
|
switch (Arch) {
|
|
case Triple::x86: {
|
|
static const char *const Table[] = {
|
|
"GENERIC_RELOC_VANILLA",
|
|
"GENERIC_RELOC_PAIR",
|
|
"GENERIC_RELOC_SECTDIFF",
|
|
"GENERIC_RELOC_PB_LA_PTR",
|
|
"GENERIC_RELOC_LOCAL_SECTDIFF",
|
|
"GENERIC_RELOC_TLV" };
|
|
|
|
if (RType > 6)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[RType];
|
|
break;
|
|
}
|
|
case Triple::x86_64: {
|
|
static const char *const Table[] = {
|
|
"X86_64_RELOC_UNSIGNED",
|
|
"X86_64_RELOC_SIGNED",
|
|
"X86_64_RELOC_BRANCH",
|
|
"X86_64_RELOC_GOT_LOAD",
|
|
"X86_64_RELOC_GOT",
|
|
"X86_64_RELOC_SUBTRACTOR",
|
|
"X86_64_RELOC_SIGNED_1",
|
|
"X86_64_RELOC_SIGNED_2",
|
|
"X86_64_RELOC_SIGNED_4",
|
|
"X86_64_RELOC_TLV" };
|
|
|
|
if (RType > 9)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[RType];
|
|
break;
|
|
}
|
|
case Triple::arm: {
|
|
static const char *const Table[] = {
|
|
"ARM_RELOC_VANILLA",
|
|
"ARM_RELOC_PAIR",
|
|
"ARM_RELOC_SECTDIFF",
|
|
"ARM_RELOC_LOCAL_SECTDIFF",
|
|
"ARM_RELOC_PB_LA_PTR",
|
|
"ARM_RELOC_BR24",
|
|
"ARM_THUMB_RELOC_BR22",
|
|
"ARM_THUMB_32BIT_BRANCH",
|
|
"ARM_RELOC_HALF",
|
|
"ARM_RELOC_HALF_SECTDIFF" };
|
|
|
|
if (RType > 9)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[RType];
|
|
break;
|
|
}
|
|
case Triple::ppc: {
|
|
static const char *const Table[] = {
|
|
"PPC_RELOC_VANILLA",
|
|
"PPC_RELOC_PAIR",
|
|
"PPC_RELOC_BR14",
|
|
"PPC_RELOC_BR24",
|
|
"PPC_RELOC_HI16",
|
|
"PPC_RELOC_LO16",
|
|
"PPC_RELOC_HA16",
|
|
"PPC_RELOC_LO14",
|
|
"PPC_RELOC_SECTDIFF",
|
|
"PPC_RELOC_PB_LA_PTR",
|
|
"PPC_RELOC_HI16_SECTDIFF",
|
|
"PPC_RELOC_LO16_SECTDIFF",
|
|
"PPC_RELOC_HA16_SECTDIFF",
|
|
"PPC_RELOC_JBSR",
|
|
"PPC_RELOC_LO14_SECTDIFF",
|
|
"PPC_RELOC_LOCAL_SECTDIFF" };
|
|
|
|
res = Table[RType];
|
|
break;
|
|
}
|
|
case Triple::UnknownArch:
|
|
res = "Unknown";
|
|
break;
|
|
}
|
|
Result.append(res.begin(), res.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
|
|
unsigned Arch = this->getArch();
|
|
|
|
std::string fmtbuf;
|
|
raw_string_ostream fmt(fmtbuf);
|
|
unsigned Type = this->getAnyRelocationType(RE);
|
|
bool IsPCRel = this->getAnyRelocationPCRel(RE);
|
|
|
|
// Determine any addends that should be displayed with the relocation.
|
|
// These require decoding the relocation type, which is triple-specific.
|
|
|
|
// X86_64 has entirely custom relocation types.
|
|
if (Arch == Triple::x86_64) {
|
|
bool isPCRel = getAnyRelocationPCRel(RE);
|
|
|
|
switch (Type) {
|
|
case MachO::X86_64_RELOC_GOT_LOAD:
|
|
case MachO::X86_64_RELOC_GOT: {
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "@GOT";
|
|
if (isPCRel) fmt << "PCREL";
|
|
break;
|
|
}
|
|
case MachO::X86_64_RELOC_SUBTRACTOR: {
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
MachO::any_relocation_info RENext = getRelocation(RelNext);
|
|
|
|
// X86_64_RELOC_SUBTRACTOR must be followed by a relocation of type
|
|
// X86_64_RELOC_UNSIGNED.
|
|
// NOTE: Scattered relocations don't exist on x86_64.
|
|
unsigned RType = getAnyRelocationType(RENext);
|
|
if (RType != MachO::X86_64_RELOC_UNSIGNED)
|
|
report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
|
|
"X86_64_RELOC_SUBTRACTOR.");
|
|
|
|
// The X86_64_RELOC_UNSIGNED contains the minuend symbol;
|
|
// X86_64_RELOC_SUBTRACTOR contains the subtrahend.
|
|
printRelocationTargetName(this, RENext, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(this, RE, fmt);
|
|
break;
|
|
}
|
|
case MachO::X86_64_RELOC_TLV:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "@TLV";
|
|
if (isPCRel) fmt << "P";
|
|
break;
|
|
case MachO::X86_64_RELOC_SIGNED_1:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "-1";
|
|
break;
|
|
case MachO::X86_64_RELOC_SIGNED_2:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "-2";
|
|
break;
|
|
case MachO::X86_64_RELOC_SIGNED_4:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "-4";
|
|
break;
|
|
default:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
break;
|
|
}
|
|
// X86 and ARM share some relocation types in common.
|
|
} else if (Arch == Triple::x86 || Arch == Triple::arm ||
|
|
Arch == Triple::ppc) {
|
|
// Generic relocation types...
|
|
switch (Type) {
|
|
case MachO::GENERIC_RELOC_PAIR: // prints no info
|
|
return object_error::success;
|
|
case MachO::GENERIC_RELOC_SECTDIFF: {
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
MachO::any_relocation_info RENext = getRelocation(RelNext);
|
|
|
|
// X86 sect diff's must be followed by a relocation of type
|
|
// GENERIC_RELOC_PAIR.
|
|
unsigned RType = getAnyRelocationType(RENext);
|
|
|
|
if (RType != MachO::GENERIC_RELOC_PAIR)
|
|
report_fatal_error("Expected GENERIC_RELOC_PAIR after "
|
|
"GENERIC_RELOC_SECTDIFF.");
|
|
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(this, RENext, fmt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Arch == Triple::x86 || Arch == Triple::ppc) {
|
|
switch (Type) {
|
|
case MachO::GENERIC_RELOC_LOCAL_SECTDIFF: {
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
MachO::any_relocation_info RENext = getRelocation(RelNext);
|
|
|
|
// X86 sect diff's must be followed by a relocation of type
|
|
// GENERIC_RELOC_PAIR.
|
|
unsigned RType = getAnyRelocationType(RENext);
|
|
if (RType != MachO::GENERIC_RELOC_PAIR)
|
|
report_fatal_error("Expected GENERIC_RELOC_PAIR after "
|
|
"GENERIC_RELOC_LOCAL_SECTDIFF.");
|
|
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(this, RENext, fmt);
|
|
break;
|
|
}
|
|
case MachO::GENERIC_RELOC_TLV: {
|
|
printRelocationTargetName(this, RE, fmt);
|
|
fmt << "@TLV";
|
|
if (IsPCRel) fmt << "P";
|
|
break;
|
|
}
|
|
default:
|
|
printRelocationTargetName(this, RE, fmt);
|
|
}
|
|
} else { // ARM-specific relocations
|
|
switch (Type) {
|
|
case MachO::ARM_RELOC_HALF:
|
|
case MachO::ARM_RELOC_HALF_SECTDIFF: {
|
|
// Half relocations steal a bit from the length field to encode
|
|
// whether this is an upper16 or a lower16 relocation.
|
|
bool isUpper = getAnyRelocationLength(RE) >> 1;
|
|
|
|
if (isUpper)
|
|
fmt << ":upper16:(";
|
|
else
|
|
fmt << ":lower16:(";
|
|
printRelocationTargetName(this, RE, fmt);
|
|
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
MachO::any_relocation_info RENext = getRelocation(RelNext);
|
|
|
|
// ARM half relocs must be followed by a relocation of type
|
|
// ARM_RELOC_PAIR.
|
|
unsigned RType = getAnyRelocationType(RENext);
|
|
if (RType != MachO::ARM_RELOC_PAIR)
|
|
report_fatal_error("Expected ARM_RELOC_PAIR after "
|
|
"ARM_RELOC_HALF");
|
|
|
|
// NOTE: The half of the target virtual address is stashed in the
|
|
// address field of the secondary relocation, but we can't reverse
|
|
// engineer the constant offset from it without decoding the movw/movt
|
|
// instruction to find the other half in its immediate field.
|
|
|
|
// ARM_RELOC_HALF_SECTDIFF encodes the second section in the
|
|
// symbol/section pointer of the follow-on relocation.
|
|
if (Type == MachO::ARM_RELOC_HALF_SECTDIFF) {
|
|
fmt << "-";
|
|
printRelocationTargetName(this, RENext, fmt);
|
|
}
|
|
|
|
fmt << ")";
|
|
break;
|
|
}
|
|
default: {
|
|
printRelocationTargetName(this, RE, fmt);
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
printRelocationTargetName(this, RE, fmt);
|
|
|
|
fmt.flush();
|
|
Result.append(fmtbuf.begin(), fmtbuf.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code
|
|
MachOObjectFile::getRelocationHidden(DataRefImpl Rel, bool &Result) const {
|
|
unsigned Arch = getArch();
|
|
uint64_t Type;
|
|
getRelocationType(Rel, Type);
|
|
|
|
Result = false;
|
|
|
|
// On arches that use the generic relocations, GENERIC_RELOC_PAIR
|
|
// is always hidden.
|
|
if (Arch == Triple::x86 || Arch == Triple::arm || Arch == Triple::ppc) {
|
|
if (Type == MachO::GENERIC_RELOC_PAIR) Result = true;
|
|
} else if (Arch == Triple::x86_64) {
|
|
// On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
|
|
// an X86_64_RELOC_SUBTRACTOR.
|
|
if (Type == MachO::X86_64_RELOC_UNSIGNED && Rel.d.a > 0) {
|
|
DataRefImpl RelPrev = Rel;
|
|
RelPrev.d.a--;
|
|
uint64_t PrevType;
|
|
getRelocationType(RelPrev, PrevType);
|
|
if (PrevType == MachO::X86_64_RELOC_SUBTRACTOR)
|
|
Result = true;
|
|
}
|
|
}
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getLibraryNext(DataRefImpl LibData,
|
|
LibraryRef &Res) const {
|
|
report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
error_code MachOObjectFile::getLibraryPath(DataRefImpl LibData,
|
|
StringRef &Res) const {
|
|
report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
symbol_iterator MachOObjectFile::begin_symbols() const {
|
|
DataRefImpl DRI;
|
|
if (!SymtabLoadCmd)
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Symtab.symoff));
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
symbol_iterator MachOObjectFile::end_symbols() const {
|
|
DataRefImpl DRI;
|
|
if (!SymtabLoadCmd)
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
unsigned SymbolTableEntrySize = is64Bit() ?
|
|
sizeof(MachO::nlist_64) :
|
|
sizeof(MachO::nlist);
|
|
unsigned Offset = Symtab.symoff +
|
|
Symtab.nsyms * SymbolTableEntrySize;
|
|
DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
|
|
return symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
symbol_iterator MachOObjectFile::begin_dynamic_symbols() const {
|
|
// TODO: implement
|
|
report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
symbol_iterator MachOObjectFile::end_dynamic_symbols() const {
|
|
// TODO: implement
|
|
report_fatal_error("Dynamic symbols unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
section_iterator MachOObjectFile::begin_sections() const {
|
|
DataRefImpl DRI;
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
section_iterator MachOObjectFile::end_sections() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = Sections.size();
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
library_iterator MachOObjectFile::begin_libraries_needed() const {
|
|
// TODO: implement
|
|
report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
library_iterator MachOObjectFile::end_libraries_needed() const {
|
|
// TODO: implement
|
|
report_fatal_error("Needed libraries unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
uint8_t MachOObjectFile::getBytesInAddress() const {
|
|
return is64Bit() ? 8 : 4;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getFileFormatName() const {
|
|
unsigned CPUType = getCPUType(this);
|
|
if (!is64Bit()) {
|
|
switch (CPUType) {
|
|
case llvm::MachO::CPU_TYPE_I386:
|
|
return "Mach-O 32-bit i386";
|
|
case llvm::MachO::CPU_TYPE_ARM:
|
|
return "Mach-O arm";
|
|
case llvm::MachO::CPU_TYPE_POWERPC:
|
|
return "Mach-O 32-bit ppc";
|
|
default:
|
|
assert((CPUType & llvm::MachO::CPU_ARCH_ABI64) == 0 &&
|
|
"64-bit object file when we're not 64-bit?");
|
|
return "Mach-O 32-bit unknown";
|
|
}
|
|
}
|
|
|
|
// Make sure the cpu type has the correct mask.
|
|
assert((CPUType & llvm::MachO::CPU_ARCH_ABI64)
|
|
== llvm::MachO::CPU_ARCH_ABI64 &&
|
|
"32-bit object file when we're 64-bit?");
|
|
|
|
switch (CPUType) {
|
|
case llvm::MachO::CPU_TYPE_X86_64:
|
|
return "Mach-O 64-bit x86-64";
|
|
case llvm::MachO::CPU_TYPE_POWERPC64:
|
|
return "Mach-O 64-bit ppc64";
|
|
default:
|
|
return "Mach-O 64-bit unknown";
|
|
}
|
|
}
|
|
|
|
Triple::ArchType MachOObjectFile::getArch(uint32_t CPUType) {
|
|
switch (CPUType) {
|
|
case llvm::MachO::CPU_TYPE_I386:
|
|
return Triple::x86;
|
|
case llvm::MachO::CPU_TYPE_X86_64:
|
|
return Triple::x86_64;
|
|
case llvm::MachO::CPU_TYPE_ARM:
|
|
return Triple::arm;
|
|
case llvm::MachO::CPU_TYPE_POWERPC:
|
|
return Triple::ppc;
|
|
case llvm::MachO::CPU_TYPE_POWERPC64:
|
|
return Triple::ppc64;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
unsigned MachOObjectFile::getArch() const {
|
|
return getArch(getCPUType(this));
|
|
}
|
|
|
|
StringRef MachOObjectFile::getLoadName() const {
|
|
// TODO: Implement
|
|
report_fatal_error("get_load_name() unimplemented in MachOObjectFile");
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::section_rel_begin(unsigned Index) const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = Index;
|
|
return section_rel_begin(DRI);
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::section_rel_end(unsigned Index) const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = Index;
|
|
return section_rel_end(DRI);
|
|
}
|
|
|
|
dice_iterator MachOObjectFile::begin_dices() const {
|
|
DataRefImpl DRI;
|
|
if (!DataInCodeLoadCmd)
|
|
return dice_iterator(DiceRef(DRI, this));
|
|
|
|
MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
|
|
DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, DicLC.dataoff));
|
|
return dice_iterator(DiceRef(DRI, this));
|
|
}
|
|
|
|
dice_iterator MachOObjectFile::end_dices() const {
|
|
DataRefImpl DRI;
|
|
if (!DataInCodeLoadCmd)
|
|
return dice_iterator(DiceRef(DRI, this));
|
|
|
|
MachO::linkedit_data_command DicLC = getDataInCodeLoadCommand();
|
|
unsigned Offset = DicLC.dataoff + DicLC.datasize;
|
|
DRI.p = reinterpret_cast<uintptr_t>(getPtr(this, Offset));
|
|
return dice_iterator(DiceRef(DRI, this));
|
|
}
|
|
|
|
StringRef
|
|
MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
|
|
ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
|
|
return parseSegmentOrSectionName(Raw.data());
|
|
}
|
|
|
|
ArrayRef<char>
|
|
MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
|
|
const section_base *Base =
|
|
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
|
|
return ArrayRef<char>(Base->sectname);
|
|
}
|
|
|
|
ArrayRef<char>
|
|
MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
|
|
const section_base *Base =
|
|
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
|
|
return ArrayRef<char>(Base->segname);
|
|
}
|
|
|
|
bool
|
|
MachOObjectFile::isRelocationScattered(const MachO::any_relocation_info &RE)
|
|
const {
|
|
if (getCPUType(this) == MachO::CPU_TYPE_X86_64)
|
|
return false;
|
|
return getPlainRelocationAddress(RE) & MachO::R_SCATTERED;
|
|
}
|
|
|
|
unsigned MachOObjectFile::getPlainRelocationSymbolNum(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isLittleEndian())
|
|
return RE.r_word1 & 0xffffff;
|
|
return RE.r_word1 >> 8;
|
|
}
|
|
|
|
bool MachOObjectFile::getPlainRelocationExternal(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isLittleEndian())
|
|
return (RE.r_word1 >> 27) & 1;
|
|
return (RE.r_word1 >> 4) & 1;
|
|
}
|
|
|
|
bool MachOObjectFile::getScatteredRelocationScattered(
|
|
const MachO::any_relocation_info &RE) const {
|
|
return RE.r_word0 >> 31;
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getScatteredRelocationValue(
|
|
const MachO::any_relocation_info &RE) const {
|
|
return RE.r_word1;
|
|
}
|
|
|
|
unsigned MachOObjectFile::getAnyRelocationAddress(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE))
|
|
return getScatteredRelocationAddress(RE);
|
|
return getPlainRelocationAddress(RE);
|
|
}
|
|
|
|
unsigned MachOObjectFile::getAnyRelocationPCRel(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE))
|
|
return getScatteredRelocationPCRel(this, RE);
|
|
return getPlainRelocationPCRel(this, RE);
|
|
}
|
|
|
|
unsigned MachOObjectFile::getAnyRelocationLength(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE))
|
|
return getScatteredRelocationLength(RE);
|
|
return getPlainRelocationLength(this, RE);
|
|
}
|
|
|
|
unsigned
|
|
MachOObjectFile::getAnyRelocationType(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE))
|
|
return getScatteredRelocationType(RE);
|
|
return getPlainRelocationType(this, RE);
|
|
}
|
|
|
|
SectionRef
|
|
MachOObjectFile::getRelocationSection(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE) || getPlainRelocationExternal(RE))
|
|
return *end_sections();
|
|
unsigned SecNum = getPlainRelocationSymbolNum(RE) - 1;
|
|
DataRefImpl DRI;
|
|
DRI.d.a = SecNum;
|
|
return SectionRef(DRI, this);
|
|
}
|
|
|
|
MachOObjectFile::LoadCommandInfo
|
|
MachOObjectFile::getFirstLoadCommandInfo() const {
|
|
MachOObjectFile::LoadCommandInfo Load;
|
|
|
|
unsigned HeaderSize = is64Bit() ? sizeof(MachO::mach_header_64) :
|
|
sizeof(MachO::mach_header);
|
|
Load.Ptr = getPtr(this, HeaderSize);
|
|
Load.C = getStruct<MachO::load_command>(this, Load.Ptr);
|
|
return Load;
|
|
}
|
|
|
|
MachOObjectFile::LoadCommandInfo
|
|
MachOObjectFile::getNextLoadCommandInfo(const LoadCommandInfo &L) const {
|
|
MachOObjectFile::LoadCommandInfo Next;
|
|
Next.Ptr = L.Ptr + L.C.cmdsize;
|
|
Next.C = getStruct<MachO::load_command>(this, Next.Ptr);
|
|
return Next;
|
|
}
|
|
|
|
MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
|
|
return getStruct<MachO::section>(this, Sections[DRI.d.a]);
|
|
}
|
|
|
|
MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
|
|
return getStruct<MachO::section_64>(this, Sections[DRI.d.a]);
|
|
}
|
|
|
|
MachO::section MachOObjectFile::getSection(const LoadCommandInfo &L,
|
|
unsigned Index) const {
|
|
const char *Sec = getSectionPtr(this, L, Index);
|
|
return getStruct<MachO::section>(this, Sec);
|
|
}
|
|
|
|
MachO::section_64 MachOObjectFile::getSection64(const LoadCommandInfo &L,
|
|
unsigned Index) const {
|
|
const char *Sec = getSectionPtr(this, L, Index);
|
|
return getStruct<MachO::section_64>(this, Sec);
|
|
}
|
|
|
|
MachO::nlist
|
|
MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI) const {
|
|
const char *P = reinterpret_cast<const char *>(DRI.p);
|
|
return getStruct<MachO::nlist>(this, P);
|
|
}
|
|
|
|
MachO::nlist_64
|
|
MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI) const {
|
|
const char *P = reinterpret_cast<const char *>(DRI.p);
|
|
return getStruct<MachO::nlist_64>(this, P);
|
|
}
|
|
|
|
MachO::linkedit_data_command
|
|
MachOObjectFile::getLinkeditDataLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::linkedit_data_command>(this, L.Ptr);
|
|
}
|
|
|
|
MachO::segment_command
|
|
MachOObjectFile::getSegmentLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::segment_command>(this, L.Ptr);
|
|
}
|
|
|
|
MachO::segment_command_64
|
|
MachOObjectFile::getSegment64LoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::segment_command_64>(this, L.Ptr);
|
|
}
|
|
|
|
MachO::linker_options_command
|
|
MachOObjectFile::getLinkerOptionsLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::linker_options_command>(this, L.Ptr);
|
|
}
|
|
|
|
MachO::any_relocation_info
|
|
MachOObjectFile::getRelocation(DataRefImpl Rel) const {
|
|
const char *P = reinterpret_cast<const char *>(Rel.p);
|
|
return getStruct<MachO::any_relocation_info>(this, P);
|
|
}
|
|
|
|
MachO::data_in_code_entry
|
|
MachOObjectFile::getDice(DataRefImpl Rel) const {
|
|
const char *P = reinterpret_cast<const char *>(Rel.p);
|
|
return getStruct<MachO::data_in_code_entry>(this, P);
|
|
}
|
|
|
|
MachO::mach_header MachOObjectFile::getHeader() const {
|
|
return getStruct<MachO::mach_header>(this, getPtr(this, 0));
|
|
}
|
|
|
|
MachO::mach_header_64 MachOObjectFile::getHeader64() const {
|
|
return getStruct<MachO::mach_header_64>(this, getPtr(this, 0));
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getIndirectSymbolTableEntry(
|
|
const MachO::dysymtab_command &DLC,
|
|
unsigned Index) const {
|
|
uint64_t Offset = DLC.indirectsymoff + Index * sizeof(uint32_t);
|
|
return getStruct<uint32_t>(this, getPtr(this, Offset));
|
|
}
|
|
|
|
MachO::data_in_code_entry
|
|
MachOObjectFile::getDataInCodeTableEntry(uint32_t DataOffset,
|
|
unsigned Index) const {
|
|
uint64_t Offset = DataOffset + Index * sizeof(MachO::data_in_code_entry);
|
|
return getStruct<MachO::data_in_code_entry>(this, getPtr(this, Offset));
|
|
}
|
|
|
|
MachO::symtab_command MachOObjectFile::getSymtabLoadCommand() const {
|
|
return getStruct<MachO::symtab_command>(this, SymtabLoadCmd);
|
|
}
|
|
|
|
MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
|
|
return getStruct<MachO::dysymtab_command>(this, DysymtabLoadCmd);
|
|
}
|
|
|
|
MachO::linkedit_data_command
|
|
MachOObjectFile::getDataInCodeLoadCommand() const {
|
|
if (DataInCodeLoadCmd)
|
|
return getStruct<MachO::linkedit_data_command>(this, DataInCodeLoadCmd);
|
|
|
|
// If there is no DataInCodeLoadCmd return a load command with zero'ed fields.
|
|
MachO::linkedit_data_command Cmd;
|
|
Cmd.cmd = MachO::LC_DATA_IN_CODE;
|
|
Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
|
|
Cmd.dataoff = 0;
|
|
Cmd.datasize = 0;
|
|
return Cmd;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getStringTableData() const {
|
|
MachO::symtab_command S = getSymtabLoadCommand();
|
|
return getData().substr(S.stroff, S.strsize);
|
|
}
|
|
|
|
bool MachOObjectFile::is64Bit() const {
|
|
return getType() == getMachOType(false, true) ||
|
|
getType() == getMachOType(true, true);
|
|
}
|
|
|
|
void MachOObjectFile::ReadULEB128s(uint64_t Index,
|
|
SmallVectorImpl<uint64_t> &Out) const {
|
|
DataExtractor extractor(ObjectFile::getData(), true, 0);
|
|
|
|
uint32_t offset = Index;
|
|
uint64_t data = 0;
|
|
while (uint64_t delta = extractor.getULEB128(&offset)) {
|
|
data += delta;
|
|
Out.push_back(data);
|
|
}
|
|
}
|
|
|
|
ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
|
|
StringRef Magic = Buffer->getBuffer().slice(0, 4);
|
|
error_code ec;
|
|
OwningPtr<ObjectFile> Ret;
|
|
if (Magic == "\xFE\xED\xFA\xCE")
|
|
Ret.reset(new MachOObjectFile(Buffer, false, false, ec));
|
|
else if (Magic == "\xCE\xFA\xED\xFE")
|
|
Ret.reset(new MachOObjectFile(Buffer, true, false, ec));
|
|
else if (Magic == "\xFE\xED\xFA\xCF")
|
|
Ret.reset(new MachOObjectFile(Buffer, false, true, ec));
|
|
else if (Magic == "\xCF\xFA\xED\xFE")
|
|
Ret.reset(new MachOObjectFile(Buffer, true, true, ec));
|
|
else {
|
|
delete Buffer;
|
|
return NULL;
|
|
}
|
|
|
|
if (ec)
|
|
return NULL;
|
|
return Ret.take();
|
|
}
|
|
|
|
} // end namespace object
|
|
} // end namespace llvm
|