forked from OSchip/llvm-project
4648 lines
176 KiB
C++
4648 lines
176 KiB
C++
//===- MachOObjectFile.cpp - Mach-O object file binding -------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines the MachOObjectFile class, which binds the MachOObject
|
|
// class to the generic ObjectFile wrapper.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/ArrayRef.h"
|
|
#include "llvm/ADT/None.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/ADT/Triple.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/BinaryFormat/MachO.h"
|
|
#include "llvm/Object/Error.h"
|
|
#include "llvm/Object/MachO.h"
|
|
#include "llvm/Object/ObjectFile.h"
|
|
#include "llvm/Object/SymbolicFile.h"
|
|
#include "llvm/Support/DataExtractor.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/Error.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/Format.h"
|
|
#include "llvm/Support/Host.h"
|
|
#include "llvm/Support/LEB128.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/SwapByteOrder.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#include <cstring>
|
|
#include <limits>
|
|
#include <list>
|
|
#include <memory>
|
|
#include <string>
|
|
#include <system_error>
|
|
|
|
using namespace llvm;
|
|
using namespace object;
|
|
|
|
namespace {
|
|
|
|
struct section_base {
|
|
char sectname[16];
|
|
char segname[16];
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
static Error malformedError(const Twine &Msg) {
|
|
return make_error<GenericBinaryError>("truncated or malformed object (" +
|
|
Msg + ")",
|
|
object_error::parse_failed);
|
|
}
|
|
|
|
// FIXME: Replace all uses of this function with getStructOrErr.
|
|
template <typename T>
|
|
static T getStruct(const MachOObjectFile &O, const char *P) {
|
|
// Don't read before the beginning or past the end of the file
|
|
if (P < O.getData().begin() || P + sizeof(T) > O.getData().end())
|
|
report_fatal_error("Malformed MachO file.");
|
|
|
|
T Cmd;
|
|
memcpy(&Cmd, P, sizeof(T));
|
|
if (O.isLittleEndian() != sys::IsLittleEndianHost)
|
|
MachO::swapStruct(Cmd);
|
|
return Cmd;
|
|
}
|
|
|
|
template <typename T>
|
|
static Expected<T> getStructOrErr(const MachOObjectFile &O, const char *P) {
|
|
// Don't read before the beginning or past the end of the file
|
|
if (P < O.getData().begin() || P + sizeof(T) > O.getData().end())
|
|
return malformedError("Structure read out-of-range");
|
|
|
|
T Cmd;
|
|
memcpy(&Cmd, P, sizeof(T));
|
|
if (O.isLittleEndian() != sys::IsLittleEndianHost)
|
|
MachO::swapStruct(Cmd);
|
|
return Cmd;
|
|
}
|
|
|
|
static const char *
|
|
getSectionPtr(const MachOObjectFile &O, MachOObjectFile::LoadCommandInfo L,
|
|
unsigned Sec) {
|
|
uintptr_t CommandAddr = reinterpret_cast<uintptr_t>(L.Ptr);
|
|
|
|
bool Is64 = O.is64Bit();
|
|
unsigned SegmentLoadSize = Is64 ? sizeof(MachO::segment_command_64) :
|
|
sizeof(MachO::segment_command);
|
|
unsigned SectionSize = Is64 ? sizeof(MachO::section_64) :
|
|
sizeof(MachO::section);
|
|
|
|
uintptr_t SectionAddr = CommandAddr + SegmentLoadSize + Sec * SectionSize;
|
|
return reinterpret_cast<const char*>(SectionAddr);
|
|
}
|
|
|
|
static const char *getPtr(const MachOObjectFile &O, size_t Offset) {
|
|
assert(Offset <= O.getData().size());
|
|
return O.getData().data() + Offset;
|
|
}
|
|
|
|
static MachO::nlist_base
|
|
getSymbolTableEntryBase(const MachOObjectFile &O, DataRefImpl DRI) {
|
|
const char *P = reinterpret_cast<const char *>(DRI.p);
|
|
return getStruct<MachO::nlist_base>(O, P);
|
|
}
|
|
|
|
static StringRef parseSegmentOrSectionName(const char *P) {
|
|
if (P[15] == 0)
|
|
// Null terminated.
|
|
return P;
|
|
// Not null terminated, so this is a 16 char string.
|
|
return StringRef(P, 16);
|
|
}
|
|
|
|
static unsigned getCPUType(const MachOObjectFile &O) {
|
|
return O.getHeader().cputype;
|
|
}
|
|
|
|
static unsigned getCPUSubType(const MachOObjectFile &O) {
|
|
return O.getHeader().cpusubtype;
|
|
}
|
|
|
|
static uint32_t
|
|
getPlainRelocationAddress(const MachO::any_relocation_info &RE) {
|
|
return RE.r_word0;
|
|
}
|
|
|
|
static unsigned
|
|
getScatteredRelocationAddress(const MachO::any_relocation_info &RE) {
|
|
return RE.r_word0 & 0xffffff;
|
|
}
|
|
|
|
static bool getPlainRelocationPCRel(const MachOObjectFile &O,
|
|
const MachO::any_relocation_info &RE) {
|
|
if (O.isLittleEndian())
|
|
return (RE.r_word1 >> 24) & 1;
|
|
return (RE.r_word1 >> 7) & 1;
|
|
}
|
|
|
|
static bool
|
|
getScatteredRelocationPCRel(const MachO::any_relocation_info &RE) {
|
|
return (RE.r_word0 >> 30) & 1;
|
|
}
|
|
|
|
static unsigned getPlainRelocationLength(const MachOObjectFile &O,
|
|
const MachO::any_relocation_info &RE) {
|
|
if (O.isLittleEndian())
|
|
return (RE.r_word1 >> 25) & 3;
|
|
return (RE.r_word1 >> 5) & 3;
|
|
}
|
|
|
|
static unsigned
|
|
getScatteredRelocationLength(const MachO::any_relocation_info &RE) {
|
|
return (RE.r_word0 >> 28) & 3;
|
|
}
|
|
|
|
static unsigned getPlainRelocationType(const MachOObjectFile &O,
|
|
const MachO::any_relocation_info &RE) {
|
|
if (O.isLittleEndian())
|
|
return RE.r_word1 >> 28;
|
|
return RE.r_word1 & 0xf;
|
|
}
|
|
|
|
static uint32_t getSectionFlags(const MachOObjectFile &O,
|
|
DataRefImpl Sec) {
|
|
if (O.is64Bit()) {
|
|
MachO::section_64 Sect = O.getSection64(Sec);
|
|
return Sect.flags;
|
|
}
|
|
MachO::section Sect = O.getSection(Sec);
|
|
return Sect.flags;
|
|
}
|
|
|
|
static Expected<MachOObjectFile::LoadCommandInfo>
|
|
getLoadCommandInfo(const MachOObjectFile &Obj, const char *Ptr,
|
|
uint32_t LoadCommandIndex) {
|
|
if (auto CmdOrErr = getStructOrErr<MachO::load_command>(Obj, Ptr)) {
|
|
if (CmdOrErr->cmdsize + Ptr > Obj.getData().end())
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" extends past end of file");
|
|
if (CmdOrErr->cmdsize < 8)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" with size less than 8 bytes");
|
|
return MachOObjectFile::LoadCommandInfo({Ptr, *CmdOrErr});
|
|
} else
|
|
return CmdOrErr.takeError();
|
|
}
|
|
|
|
static Expected<MachOObjectFile::LoadCommandInfo>
|
|
getFirstLoadCommandInfo(const MachOObjectFile &Obj) {
|
|
unsigned HeaderSize = Obj.is64Bit() ? sizeof(MachO::mach_header_64)
|
|
: sizeof(MachO::mach_header);
|
|
if (sizeof(MachO::load_command) > Obj.getHeader().sizeofcmds)
|
|
return malformedError("load command 0 extends past the end all load "
|
|
"commands in the file");
|
|
return getLoadCommandInfo(Obj, getPtr(Obj, HeaderSize), 0);
|
|
}
|
|
|
|
static Expected<MachOObjectFile::LoadCommandInfo>
|
|
getNextLoadCommandInfo(const MachOObjectFile &Obj, uint32_t LoadCommandIndex,
|
|
const MachOObjectFile::LoadCommandInfo &L) {
|
|
unsigned HeaderSize = Obj.is64Bit() ? sizeof(MachO::mach_header_64)
|
|
: sizeof(MachO::mach_header);
|
|
if (L.Ptr + L.C.cmdsize + sizeof(MachO::load_command) >
|
|
Obj.getData().data() + HeaderSize + Obj.getHeader().sizeofcmds)
|
|
return malformedError("load command " + Twine(LoadCommandIndex + 1) +
|
|
" extends past the end all load commands in the file");
|
|
return getLoadCommandInfo(Obj, L.Ptr + L.C.cmdsize, LoadCommandIndex + 1);
|
|
}
|
|
|
|
template <typename T>
|
|
static void parseHeader(const MachOObjectFile &Obj, T &Header,
|
|
Error &Err) {
|
|
if (sizeof(T) > Obj.getData().size()) {
|
|
Err = malformedError("the mach header extends past the end of the "
|
|
"file");
|
|
return;
|
|
}
|
|
if (auto HeaderOrErr = getStructOrErr<T>(Obj, getPtr(Obj, 0)))
|
|
Header = *HeaderOrErr;
|
|
else
|
|
Err = HeaderOrErr.takeError();
|
|
}
|
|
|
|
// This is used to check for overlapping of Mach-O elements.
|
|
struct MachOElement {
|
|
uint64_t Offset;
|
|
uint64_t Size;
|
|
const char *Name;
|
|
};
|
|
|
|
static Error checkOverlappingElement(std::list<MachOElement> &Elements,
|
|
uint64_t Offset, uint64_t Size,
|
|
const char *Name) {
|
|
if (Size == 0)
|
|
return Error::success();
|
|
|
|
for (auto it=Elements.begin() ; it != Elements.end(); ++it) {
|
|
auto E = *it;
|
|
if ((Offset >= E.Offset && Offset < E.Offset + E.Size) ||
|
|
(Offset + Size > E.Offset && Offset + Size < E.Offset + E.Size) ||
|
|
(Offset <= E.Offset && Offset + Size >= E.Offset + E.Size))
|
|
return malformedError(Twine(Name) + " at offset " + Twine(Offset) +
|
|
" with a size of " + Twine(Size) + ", overlaps " +
|
|
E.Name + " at offset " + Twine(E.Offset) + " with "
|
|
"a size of " + Twine(E.Size));
|
|
auto nt = it;
|
|
nt++;
|
|
if (nt != Elements.end()) {
|
|
auto N = *nt;
|
|
if (Offset + Size <= N.Offset) {
|
|
Elements.insert(nt, {Offset, Size, Name});
|
|
return Error::success();
|
|
}
|
|
}
|
|
}
|
|
Elements.push_back({Offset, Size, Name});
|
|
return Error::success();
|
|
}
|
|
|
|
// Parses LC_SEGMENT or LC_SEGMENT_64 load command, adds addresses of all
|
|
// sections to \param Sections, and optionally sets
|
|
// \param IsPageZeroSegment to true.
|
|
template <typename Segment, typename Section>
|
|
static Error parseSegmentLoadCommand(
|
|
const MachOObjectFile &Obj, const MachOObjectFile::LoadCommandInfo &Load,
|
|
SmallVectorImpl<const char *> &Sections, bool &IsPageZeroSegment,
|
|
uint32_t LoadCommandIndex, const char *CmdName, uint64_t SizeOfHeaders,
|
|
std::list<MachOElement> &Elements) {
|
|
const unsigned SegmentLoadSize = sizeof(Segment);
|
|
if (Load.C.cmdsize < SegmentLoadSize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" " + CmdName + " cmdsize too small");
|
|
if (auto SegOrErr = getStructOrErr<Segment>(Obj, Load.Ptr)) {
|
|
Segment S = SegOrErr.get();
|
|
const unsigned SectionSize = sizeof(Section);
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (S.nsects > std::numeric_limits<uint32_t>::max() / SectionSize ||
|
|
S.nsects * SectionSize > Load.C.cmdsize - SegmentLoadSize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" inconsistent cmdsize in " + CmdName +
|
|
" for the number of sections");
|
|
for (unsigned J = 0; J < S.nsects; ++J) {
|
|
const char *Sec = getSectionPtr(Obj, Load, J);
|
|
Sections.push_back(Sec);
|
|
auto SectionOrErr = getStructOrErr<Section>(Obj, Sec);
|
|
if (!SectionOrErr)
|
|
return SectionOrErr.takeError();
|
|
Section s = SectionOrErr.get();
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM &&
|
|
s.flags != MachO::S_ZEROFILL &&
|
|
s.flags != MachO::S_THREAD_LOCAL_ZEROFILL &&
|
|
s.offset > FileSize)
|
|
return malformedError("offset field of section " + Twine(J) + " in " +
|
|
CmdName + " command " + Twine(LoadCommandIndex) +
|
|
" extends past the end of the file");
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM &&
|
|
s.flags != MachO::S_ZEROFILL &&
|
|
s.flags != MachO::S_THREAD_LOCAL_ZEROFILL && S.fileoff == 0 &&
|
|
s.offset < SizeOfHeaders && s.size != 0)
|
|
return malformedError("offset field of section " + Twine(J) + " in " +
|
|
CmdName + " command " + Twine(LoadCommandIndex) +
|
|
" not past the headers of the file");
|
|
uint64_t BigSize = s.offset;
|
|
BigSize += s.size;
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM &&
|
|
s.flags != MachO::S_ZEROFILL &&
|
|
s.flags != MachO::S_THREAD_LOCAL_ZEROFILL &&
|
|
BigSize > FileSize)
|
|
return malformedError("offset field plus size field of section " +
|
|
Twine(J) + " in " + CmdName + " command " +
|
|
Twine(LoadCommandIndex) +
|
|
" extends past the end of the file");
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM &&
|
|
s.flags != MachO::S_ZEROFILL &&
|
|
s.flags != MachO::S_THREAD_LOCAL_ZEROFILL &&
|
|
s.size > S.filesize)
|
|
return malformedError("size field of section " +
|
|
Twine(J) + " in " + CmdName + " command " +
|
|
Twine(LoadCommandIndex) +
|
|
" greater than the segment");
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM && s.size != 0 &&
|
|
s.addr < S.vmaddr)
|
|
return malformedError("addr field of section " + Twine(J) + " in " +
|
|
CmdName + " command " + Twine(LoadCommandIndex) +
|
|
" less than the segment's vmaddr");
|
|
BigSize = s.addr;
|
|
BigSize += s.size;
|
|
uint64_t BigEnd = S.vmaddr;
|
|
BigEnd += S.vmsize;
|
|
if (S.vmsize != 0 && s.size != 0 && BigSize > BigEnd)
|
|
return malformedError("addr field plus size of section " + Twine(J) +
|
|
" in " + CmdName + " command " +
|
|
Twine(LoadCommandIndex) +
|
|
" greater than than "
|
|
"the segment's vmaddr plus vmsize");
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB_STUB &&
|
|
Obj.getHeader().filetype != MachO::MH_DSYM &&
|
|
s.flags != MachO::S_ZEROFILL &&
|
|
s.flags != MachO::S_THREAD_LOCAL_ZEROFILL)
|
|
if (Error Err = checkOverlappingElement(Elements, s.offset, s.size,
|
|
"section contents"))
|
|
return Err;
|
|
if (s.reloff > FileSize)
|
|
return malformedError("reloff field of section " + Twine(J) + " in " +
|
|
CmdName + " command " + Twine(LoadCommandIndex) +
|
|
" extends past the end of the file");
|
|
BigSize = s.nreloc;
|
|
BigSize *= sizeof(struct MachO::relocation_info);
|
|
BigSize += s.reloff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("reloff field plus nreloc field times sizeof("
|
|
"struct relocation_info) of section " +
|
|
Twine(J) + " in " + CmdName + " command " +
|
|
Twine(LoadCommandIndex) +
|
|
" extends past the end of the file");
|
|
if (Error Err = checkOverlappingElement(Elements, s.reloff, s.nreloc *
|
|
sizeof(struct
|
|
MachO::relocation_info),
|
|
"section relocation entries"))
|
|
return Err;
|
|
}
|
|
if (S.fileoff > FileSize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" fileoff field in " + CmdName +
|
|
" extends past the end of the file");
|
|
uint64_t BigSize = S.fileoff;
|
|
BigSize += S.filesize;
|
|
if (BigSize > FileSize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" fileoff field plus filesize field in " +
|
|
CmdName + " extends past the end of the file");
|
|
if (S.vmsize != 0 && S.filesize > S.vmsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" filesize field in " + CmdName +
|
|
" greater than vmsize field");
|
|
IsPageZeroSegment |= StringRef("__PAGEZERO").equals(S.segname);
|
|
} else
|
|
return SegOrErr.takeError();
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkSymtabCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **SymtabLoadCmd,
|
|
std::list<MachOElement> &Elements) {
|
|
if (Load.C.cmdsize < sizeof(MachO::symtab_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_SYMTAB cmdsize too small");
|
|
if (*SymtabLoadCmd != nullptr)
|
|
return malformedError("more than one LC_SYMTAB command");
|
|
auto SymtabOrErr = getStructOrErr<MachO::symtab_command>(Obj, Load.Ptr);
|
|
if (!SymtabOrErr)
|
|
return SymtabOrErr.takeError();
|
|
MachO::symtab_command Symtab = SymtabOrErr.get();
|
|
if (Symtab.cmdsize != sizeof(MachO::symtab_command))
|
|
return malformedError("LC_SYMTAB command " + Twine(LoadCommandIndex) +
|
|
" has incorrect cmdsize");
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (Symtab.symoff > FileSize)
|
|
return malformedError("symoff field of LC_SYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end "
|
|
"of the file");
|
|
uint64_t SymtabSize = Symtab.nsyms;
|
|
const char *struct_nlist_name;
|
|
if (Obj.is64Bit()) {
|
|
SymtabSize *= sizeof(MachO::nlist_64);
|
|
struct_nlist_name = "struct nlist_64";
|
|
} else {
|
|
SymtabSize *= sizeof(MachO::nlist);
|
|
struct_nlist_name = "struct nlist";
|
|
}
|
|
uint64_t BigSize = SymtabSize;
|
|
BigSize += Symtab.symoff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("symoff field plus nsyms field times sizeof(" +
|
|
Twine(struct_nlist_name) + ") of LC_SYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end "
|
|
"of the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Symtab.symoff, SymtabSize,
|
|
"symbol table"))
|
|
return Err;
|
|
if (Symtab.stroff > FileSize)
|
|
return malformedError("stroff field of LC_SYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end "
|
|
"of the file");
|
|
BigSize = Symtab.stroff;
|
|
BigSize += Symtab.strsize;
|
|
if (BigSize > FileSize)
|
|
return malformedError("stroff field plus strsize field of LC_SYMTAB "
|
|
"command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Symtab.stroff,
|
|
Symtab.strsize, "string table"))
|
|
return Err;
|
|
*SymtabLoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkDysymtabCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **DysymtabLoadCmd,
|
|
std::list<MachOElement> &Elements) {
|
|
if (Load.C.cmdsize < sizeof(MachO::dysymtab_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_DYSYMTAB cmdsize too small");
|
|
if (*DysymtabLoadCmd != nullptr)
|
|
return malformedError("more than one LC_DYSYMTAB command");
|
|
auto DysymtabOrErr =
|
|
getStructOrErr<MachO::dysymtab_command>(Obj, Load.Ptr);
|
|
if (!DysymtabOrErr)
|
|
return DysymtabOrErr.takeError();
|
|
MachO::dysymtab_command Dysymtab = DysymtabOrErr.get();
|
|
if (Dysymtab.cmdsize != sizeof(MachO::dysymtab_command))
|
|
return malformedError("LC_DYSYMTAB command " + Twine(LoadCommandIndex) +
|
|
" has incorrect cmdsize");
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (Dysymtab.tocoff > FileSize)
|
|
return malformedError("tocoff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
uint64_t BigSize = Dysymtab.ntoc;
|
|
BigSize *= sizeof(MachO::dylib_table_of_contents);
|
|
BigSize += Dysymtab.tocoff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("tocoff field plus ntoc field times sizeof(struct "
|
|
"dylib_table_of_contents) of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.tocoff,
|
|
Dysymtab.ntoc * sizeof(struct
|
|
MachO::dylib_table_of_contents),
|
|
"table of contents"))
|
|
return Err;
|
|
if (Dysymtab.modtaboff > FileSize)
|
|
return malformedError("modtaboff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
BigSize = Dysymtab.nmodtab;
|
|
const char *struct_dylib_module_name;
|
|
uint64_t sizeof_modtab;
|
|
if (Obj.is64Bit()) {
|
|
sizeof_modtab = sizeof(MachO::dylib_module_64);
|
|
struct_dylib_module_name = "struct dylib_module_64";
|
|
} else {
|
|
sizeof_modtab = sizeof(MachO::dylib_module);
|
|
struct_dylib_module_name = "struct dylib_module";
|
|
}
|
|
BigSize *= sizeof_modtab;
|
|
BigSize += Dysymtab.modtaboff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("modtaboff field plus nmodtab field times sizeof(" +
|
|
Twine(struct_dylib_module_name) + ") of LC_DYSYMTAB "
|
|
"command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.modtaboff,
|
|
Dysymtab.nmodtab * sizeof_modtab,
|
|
"module table"))
|
|
return Err;
|
|
if (Dysymtab.extrefsymoff > FileSize)
|
|
return malformedError("extrefsymoff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
BigSize = Dysymtab.nextrefsyms;
|
|
BigSize *= sizeof(MachO::dylib_reference);
|
|
BigSize += Dysymtab.extrefsymoff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("extrefsymoff field plus nextrefsyms field times "
|
|
"sizeof(struct dylib_reference) of LC_DYSYMTAB "
|
|
"command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.extrefsymoff,
|
|
Dysymtab.nextrefsyms *
|
|
sizeof(MachO::dylib_reference),
|
|
"reference table"))
|
|
return Err;
|
|
if (Dysymtab.indirectsymoff > FileSize)
|
|
return malformedError("indirectsymoff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
BigSize = Dysymtab.nindirectsyms;
|
|
BigSize *= sizeof(uint32_t);
|
|
BigSize += Dysymtab.indirectsymoff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("indirectsymoff field plus nindirectsyms field times "
|
|
"sizeof(uint32_t) of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.indirectsymoff,
|
|
Dysymtab.nindirectsyms *
|
|
sizeof(uint32_t),
|
|
"indirect table"))
|
|
return Err;
|
|
if (Dysymtab.extreloff > FileSize)
|
|
return malformedError("extreloff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
BigSize = Dysymtab.nextrel;
|
|
BigSize *= sizeof(MachO::relocation_info);
|
|
BigSize += Dysymtab.extreloff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("extreloff field plus nextrel field times sizeof"
|
|
"(struct relocation_info) of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.extreloff,
|
|
Dysymtab.nextrel *
|
|
sizeof(MachO::relocation_info),
|
|
"external relocation table"))
|
|
return Err;
|
|
if (Dysymtab.locreloff > FileSize)
|
|
return malformedError("locreloff field of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
BigSize = Dysymtab.nlocrel;
|
|
BigSize *= sizeof(MachO::relocation_info);
|
|
BigSize += Dysymtab.locreloff;
|
|
if (BigSize > FileSize)
|
|
return malformedError("locreloff field plus nlocrel field times sizeof"
|
|
"(struct relocation_info) of LC_DYSYMTAB command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Dysymtab.locreloff,
|
|
Dysymtab.nlocrel *
|
|
sizeof(MachO::relocation_info),
|
|
"local relocation table"))
|
|
return Err;
|
|
*DysymtabLoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkLinkeditDataCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **LoadCmd, const char *CmdName,
|
|
std::list<MachOElement> &Elements,
|
|
const char *ElementName) {
|
|
if (Load.C.cmdsize < sizeof(MachO::linkedit_data_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " cmdsize too small");
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one " + Twine(CmdName) + " command");
|
|
auto LinkDataOrError =
|
|
getStructOrErr<MachO::linkedit_data_command>(Obj, Load.Ptr);
|
|
if (!LinkDataOrError)
|
|
return LinkDataOrError.takeError();
|
|
MachO::linkedit_data_command LinkData = LinkDataOrError.get();
|
|
if (LinkData.cmdsize != sizeof(MachO::linkedit_data_command))
|
|
return malformedError(Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " has incorrect cmdsize");
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (LinkData.dataoff > FileSize)
|
|
return malformedError("dataoff field of " + Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
uint64_t BigSize = LinkData.dataoff;
|
|
BigSize += LinkData.datasize;
|
|
if (BigSize > FileSize)
|
|
return malformedError("dataoff field plus datasize field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, LinkData.dataoff,
|
|
LinkData.datasize, ElementName))
|
|
return Err;
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkDyldInfoCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **LoadCmd, const char *CmdName,
|
|
std::list<MachOElement> &Elements) {
|
|
if (Load.C.cmdsize < sizeof(MachO::dyld_info_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " cmdsize too small");
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one LC_DYLD_INFO and or LC_DYLD_INFO_ONLY "
|
|
"command");
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(Obj, Load.Ptr);
|
|
if (!DyldInfoOrErr)
|
|
return DyldInfoOrErr.takeError();
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
if (DyldInfo.cmdsize != sizeof(MachO::dyld_info_command))
|
|
return malformedError(Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " has incorrect cmdsize");
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (DyldInfo.rebase_off > FileSize)
|
|
return malformedError("rebase_off field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
uint64_t BigSize = DyldInfo.rebase_off;
|
|
BigSize += DyldInfo.rebase_size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("rebase_off field plus rebase_size field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, DyldInfo.rebase_off,
|
|
DyldInfo.rebase_size,
|
|
"dyld rebase info"))
|
|
return Err;
|
|
if (DyldInfo.bind_off > FileSize)
|
|
return malformedError("bind_off field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
BigSize = DyldInfo.bind_off;
|
|
BigSize += DyldInfo.bind_size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("bind_off field plus bind_size field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, DyldInfo.bind_off,
|
|
DyldInfo.bind_size,
|
|
"dyld bind info"))
|
|
return Err;
|
|
if (DyldInfo.weak_bind_off > FileSize)
|
|
return malformedError("weak_bind_off field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
BigSize = DyldInfo.weak_bind_off;
|
|
BigSize += DyldInfo.weak_bind_size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("weak_bind_off field plus weak_bind_size field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, DyldInfo.weak_bind_off,
|
|
DyldInfo.weak_bind_size,
|
|
"dyld weak bind info"))
|
|
return Err;
|
|
if (DyldInfo.lazy_bind_off > FileSize)
|
|
return malformedError("lazy_bind_off field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
BigSize = DyldInfo.lazy_bind_off;
|
|
BigSize += DyldInfo.lazy_bind_size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("lazy_bind_off field plus lazy_bind_size field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, DyldInfo.lazy_bind_off,
|
|
DyldInfo.lazy_bind_size,
|
|
"dyld lazy bind info"))
|
|
return Err;
|
|
if (DyldInfo.export_off > FileSize)
|
|
return malformedError("export_off field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
BigSize = DyldInfo.export_off;
|
|
BigSize += DyldInfo.export_size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("export_off field plus export_size field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, DyldInfo.export_off,
|
|
DyldInfo.export_size,
|
|
"dyld export info"))
|
|
return Err;
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkDylibCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex, const char *CmdName) {
|
|
if (Load.C.cmdsize < sizeof(MachO::dylib_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " cmdsize too small");
|
|
auto CommandOrErr = getStructOrErr<MachO::dylib_command>(Obj, Load.Ptr);
|
|
if (!CommandOrErr)
|
|
return CommandOrErr.takeError();
|
|
MachO::dylib_command D = CommandOrErr.get();
|
|
if (D.dylib.name < sizeof(MachO::dylib_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " name.offset field too small, not past "
|
|
"the end of the dylib_command struct");
|
|
if (D.dylib.name >= D.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " name.offset field extends past the end "
|
|
"of the load command");
|
|
// Make sure there is a null between the starting offset of the name and
|
|
// the end of the load command.
|
|
uint32_t i;
|
|
const char *P = (const char *)Load.Ptr;
|
|
for (i = D.dylib.name; i < D.cmdsize; i++)
|
|
if (P[i] == '\0')
|
|
break;
|
|
if (i >= D.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " library name extends past the end of the "
|
|
"load command");
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkDylibIdCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **LoadCmd) {
|
|
if (Error Err = checkDylibCommand(Obj, Load, LoadCommandIndex,
|
|
"LC_ID_DYLIB"))
|
|
return Err;
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one LC_ID_DYLIB command");
|
|
if (Obj.getHeader().filetype != MachO::MH_DYLIB &&
|
|
Obj.getHeader().filetype != MachO::MH_DYLIB_STUB)
|
|
return malformedError("LC_ID_DYLIB load command in non-dynamic library "
|
|
"file type");
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkDyldCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex, const char *CmdName) {
|
|
if (Load.C.cmdsize < sizeof(MachO::dylinker_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " cmdsize too small");
|
|
auto CommandOrErr = getStructOrErr<MachO::dylinker_command>(Obj, Load.Ptr);
|
|
if (!CommandOrErr)
|
|
return CommandOrErr.takeError();
|
|
MachO::dylinker_command D = CommandOrErr.get();
|
|
if (D.name < sizeof(MachO::dylinker_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " name.offset field too small, not past "
|
|
"the end of the dylinker_command struct");
|
|
if (D.name >= D.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " name.offset field extends past the end "
|
|
"of the load command");
|
|
// Make sure there is a null between the starting offset of the name and
|
|
// the end of the load command.
|
|
uint32_t i;
|
|
const char *P = (const char *)Load.Ptr;
|
|
for (i = D.name; i < D.cmdsize; i++)
|
|
if (P[i] == '\0')
|
|
break;
|
|
if (i >= D.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " dyld name extends past the end of the "
|
|
"load command");
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkVersCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **LoadCmd, const char *CmdName) {
|
|
if (Load.C.cmdsize != sizeof(MachO::version_min_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " has incorrect cmdsize");
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one LC_VERSION_MIN_MACOSX, "
|
|
"LC_VERSION_MIN_IPHONEOS, LC_VERSION_MIN_TVOS or "
|
|
"LC_VERSION_MIN_WATCHOS command");
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkNoteCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
std::list<MachOElement> &Elements) {
|
|
if (Load.C.cmdsize != sizeof(MachO::note_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_NOTE has incorrect cmdsize");
|
|
auto NoteCmdOrErr = getStructOrErr<MachO::note_command>(Obj, Load.Ptr);
|
|
if (!NoteCmdOrErr)
|
|
return NoteCmdOrErr.takeError();
|
|
MachO::note_command Nt = NoteCmdOrErr.get();
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (Nt.offset > FileSize)
|
|
return malformedError("offset field of LC_NOTE command " +
|
|
Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
uint64_t BigSize = Nt.offset;
|
|
BigSize += Nt.size;
|
|
if (BigSize > FileSize)
|
|
return malformedError("size field plus offset field of LC_NOTE command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Nt.offset, Nt.size,
|
|
"LC_NOTE data"))
|
|
return Err;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error
|
|
parseBuildVersionCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
SmallVectorImpl<const char*> &BuildTools,
|
|
uint32_t LoadCommandIndex) {
|
|
auto BVCOrErr =
|
|
getStructOrErr<MachO::build_version_command>(Obj, Load.Ptr);
|
|
if (!BVCOrErr)
|
|
return BVCOrErr.takeError();
|
|
MachO::build_version_command BVC = BVCOrErr.get();
|
|
if (Load.C.cmdsize !=
|
|
sizeof(MachO::build_version_command) +
|
|
BVC.ntools * sizeof(MachO::build_tool_version))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_BUILD_VERSION_COMMAND has incorrect cmdsize");
|
|
|
|
auto Start = Load.Ptr + sizeof(MachO::build_version_command);
|
|
BuildTools.resize(BVC.ntools);
|
|
for (unsigned i = 0; i < BVC.ntools; ++i)
|
|
BuildTools[i] = Start + i * sizeof(MachO::build_tool_version);
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkRpathCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex) {
|
|
if (Load.C.cmdsize < sizeof(MachO::rpath_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_RPATH cmdsize too small");
|
|
auto ROrErr = getStructOrErr<MachO::rpath_command>(Obj, Load.Ptr);
|
|
if (!ROrErr)
|
|
return ROrErr.takeError();
|
|
MachO::rpath_command R = ROrErr.get();
|
|
if (R.path < sizeof(MachO::rpath_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_RPATH path.offset field too small, not past "
|
|
"the end of the rpath_command struct");
|
|
if (R.path >= R.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_RPATH path.offset field extends past the end "
|
|
"of the load command");
|
|
// Make sure there is a null between the starting offset of the path and
|
|
// the end of the load command.
|
|
uint32_t i;
|
|
const char *P = (const char *)Load.Ptr;
|
|
for (i = R.path; i < R.cmdsize; i++)
|
|
if (P[i] == '\0')
|
|
break;
|
|
if (i >= R.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_RPATH library name extends past the end of the "
|
|
"load command");
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkEncryptCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
uint64_t cryptoff, uint64_t cryptsize,
|
|
const char **LoadCmd, const char *CmdName) {
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one LC_ENCRYPTION_INFO and or "
|
|
"LC_ENCRYPTION_INFO_64 command");
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (cryptoff > FileSize)
|
|
return malformedError("cryptoff field of " + Twine(CmdName) +
|
|
" command " + Twine(LoadCommandIndex) + " extends "
|
|
"past the end of the file");
|
|
uint64_t BigSize = cryptoff;
|
|
BigSize += cryptsize;
|
|
if (BigSize > FileSize)
|
|
return malformedError("cryptoff field plus cryptsize field of " +
|
|
Twine(CmdName) + " command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkLinkerOptCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex) {
|
|
if (Load.C.cmdsize < sizeof(MachO::linker_option_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_LINKER_OPTION cmdsize too small");
|
|
auto LinkOptionOrErr =
|
|
getStructOrErr<MachO::linker_option_command>(Obj, Load.Ptr);
|
|
if (!LinkOptionOrErr)
|
|
return LinkOptionOrErr.takeError();
|
|
MachO::linker_option_command L = LinkOptionOrErr.get();
|
|
// Make sure the count of strings is correct.
|
|
const char *string = (const char *)Load.Ptr +
|
|
sizeof(struct MachO::linker_option_command);
|
|
uint32_t left = L.cmdsize - sizeof(struct MachO::linker_option_command);
|
|
uint32_t i = 0;
|
|
while (left > 0) {
|
|
while (*string == '\0' && left > 0) {
|
|
string++;
|
|
left--;
|
|
}
|
|
if (left > 0) {
|
|
i++;
|
|
uint32_t NullPos = StringRef(string, left).find('\0');
|
|
if (0xffffffff == NullPos)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_LINKER_OPTION string #" + Twine(i) +
|
|
" is not NULL terminated");
|
|
uint32_t len = std::min(NullPos, left) + 1;
|
|
string += len;
|
|
left -= len;
|
|
}
|
|
}
|
|
if (L.count != i)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_LINKER_OPTION string count " + Twine(L.count) +
|
|
" does not match number of strings");
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkSubCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex, const char *CmdName,
|
|
size_t SizeOfCmd, const char *CmdStructName,
|
|
uint32_t PathOffset, const char *PathFieldName) {
|
|
if (PathOffset < SizeOfCmd)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " " + PathFieldName + ".offset field too "
|
|
"small, not past the end of the " + CmdStructName);
|
|
if (PathOffset >= Load.C.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " " + PathFieldName + ".offset field "
|
|
"extends past the end of the load command");
|
|
// Make sure there is a null between the starting offset of the path and
|
|
// the end of the load command.
|
|
uint32_t i;
|
|
const char *P = (const char *)Load.Ptr;
|
|
for (i = PathOffset; i < Load.C.cmdsize; i++)
|
|
if (P[i] == '\0')
|
|
break;
|
|
if (i >= Load.C.cmdsize)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) + " " +
|
|
CmdName + " " + PathFieldName + " name extends past "
|
|
"the end of the load command");
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkThreadCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo &Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char *CmdName) {
|
|
if (Load.C.cmdsize < sizeof(MachO::thread_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
CmdName + " cmdsize too small");
|
|
auto ThreadCommandOrErr =
|
|
getStructOrErr<MachO::thread_command>(Obj, Load.Ptr);
|
|
if (!ThreadCommandOrErr)
|
|
return ThreadCommandOrErr.takeError();
|
|
MachO::thread_command T = ThreadCommandOrErr.get();
|
|
const char *state = Load.Ptr + sizeof(MachO::thread_command);
|
|
const char *end = Load.Ptr + T.cmdsize;
|
|
uint32_t nflavor = 0;
|
|
uint32_t cputype = getCPUType(Obj);
|
|
while (state < end) {
|
|
if(state + sizeof(uint32_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
"flavor in " + CmdName + " extends past end of "
|
|
"command");
|
|
uint32_t flavor;
|
|
memcpy(&flavor, state, sizeof(uint32_t));
|
|
if (Obj.isLittleEndian() != sys::IsLittleEndianHost)
|
|
sys::swapByteOrder(flavor);
|
|
state += sizeof(uint32_t);
|
|
|
|
if(state + sizeof(uint32_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count in " + CmdName + " extends past end of "
|
|
"command");
|
|
uint32_t count;
|
|
memcpy(&count, state, sizeof(uint32_t));
|
|
if (Obj.isLittleEndian() != sys::IsLittleEndianHost)
|
|
sys::swapByteOrder(count);
|
|
state += sizeof(uint32_t);
|
|
|
|
if (cputype == MachO::CPU_TYPE_I386) {
|
|
if (flavor == MachO::x86_THREAD_STATE32) {
|
|
if (count != MachO::x86_THREAD_STATE32_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_THREAD_STATE32_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_THREAD_STATE32 flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_thread_state32_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_THREAD_STATE32 extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_thread_state32_t);
|
|
} else {
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" unknown flavor (" + Twine(flavor) + ") for "
|
|
"flavor number " + Twine(nflavor) + " in " +
|
|
CmdName + " command");
|
|
}
|
|
} else if (cputype == MachO::CPU_TYPE_X86_64) {
|
|
if (flavor == MachO::x86_THREAD_STATE) {
|
|
if (count != MachO::x86_THREAD_STATE_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_THREAD_STATE_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_THREAD_STATE flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_thread_state_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_THREAD_STATE extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_thread_state_t);
|
|
} else if (flavor == MachO::x86_FLOAT_STATE) {
|
|
if (count != MachO::x86_FLOAT_STATE_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_FLOAT_STATE_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_FLOAT_STATE flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_float_state_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_FLOAT_STATE extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_float_state_t);
|
|
} else if (flavor == MachO::x86_EXCEPTION_STATE) {
|
|
if (count != MachO::x86_EXCEPTION_STATE_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_EXCEPTION_STATE_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_EXCEPTION_STATE flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_exception_state_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_EXCEPTION_STATE extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_exception_state_t);
|
|
} else if (flavor == MachO::x86_THREAD_STATE64) {
|
|
if (count != MachO::x86_THREAD_STATE64_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_THREAD_STATE64_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_THREAD_STATE64 flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_thread_state64_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_THREAD_STATE64 extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_thread_state64_t);
|
|
} else if (flavor == MachO::x86_EXCEPTION_STATE64) {
|
|
if (count != MachO::x86_EXCEPTION_STATE64_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not x86_EXCEPTION_STATE64_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a x86_EXCEPTION_STATE64 flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::x86_exception_state64_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" x86_EXCEPTION_STATE64 extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::x86_exception_state64_t);
|
|
} else {
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" unknown flavor (" + Twine(flavor) + ") for "
|
|
"flavor number " + Twine(nflavor) + " in " +
|
|
CmdName + " command");
|
|
}
|
|
} else if (cputype == MachO::CPU_TYPE_ARM) {
|
|
if (flavor == MachO::ARM_THREAD_STATE) {
|
|
if (count != MachO::ARM_THREAD_STATE_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not ARM_THREAD_STATE_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a ARM_THREAD_STATE flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::arm_thread_state32_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" ARM_THREAD_STATE extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::arm_thread_state32_t);
|
|
} else {
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" unknown flavor (" + Twine(flavor) + ") for "
|
|
"flavor number " + Twine(nflavor) + " in " +
|
|
CmdName + " command");
|
|
}
|
|
} else if (cputype == MachO::CPU_TYPE_ARM64 ||
|
|
cputype == MachO::CPU_TYPE_ARM64_32) {
|
|
if (flavor == MachO::ARM_THREAD_STATE64) {
|
|
if (count != MachO::ARM_THREAD_STATE64_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not ARM_THREAD_STATE64_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a ARM_THREAD_STATE64 flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::arm_thread_state64_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" ARM_THREAD_STATE64 extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::arm_thread_state64_t);
|
|
} else {
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" unknown flavor (" + Twine(flavor) + ") for "
|
|
"flavor number " + Twine(nflavor) + " in " +
|
|
CmdName + " command");
|
|
}
|
|
} else if (cputype == MachO::CPU_TYPE_POWERPC) {
|
|
if (flavor == MachO::PPC_THREAD_STATE) {
|
|
if (count != MachO::PPC_THREAD_STATE_COUNT)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" count not PPC_THREAD_STATE_COUNT for "
|
|
"flavor number " + Twine(nflavor) + " which is "
|
|
"a PPC_THREAD_STATE flavor in " + CmdName +
|
|
" command");
|
|
if (state + sizeof(MachO::ppc_thread_state32_t) > end)
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" PPC_THREAD_STATE extends past end of "
|
|
"command in " + CmdName + " command");
|
|
state += sizeof(MachO::ppc_thread_state32_t);
|
|
} else {
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" unknown flavor (" + Twine(flavor) + ") for "
|
|
"flavor number " + Twine(nflavor) + " in " +
|
|
CmdName + " command");
|
|
}
|
|
} else {
|
|
return malformedError("unknown cputype (" + Twine(cputype) + ") load "
|
|
"command " + Twine(LoadCommandIndex) + " for " +
|
|
CmdName + " command can't be checked");
|
|
}
|
|
nflavor++;
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
static Error checkTwoLevelHintsCommand(const MachOObjectFile &Obj,
|
|
const MachOObjectFile::LoadCommandInfo
|
|
&Load,
|
|
uint32_t LoadCommandIndex,
|
|
const char **LoadCmd,
|
|
std::list<MachOElement> &Elements) {
|
|
if (Load.C.cmdsize != sizeof(MachO::twolevel_hints_command))
|
|
return malformedError("load command " + Twine(LoadCommandIndex) +
|
|
" LC_TWOLEVEL_HINTS has incorrect cmdsize");
|
|
if (*LoadCmd != nullptr)
|
|
return malformedError("more than one LC_TWOLEVEL_HINTS command");
|
|
auto HintsOrErr = getStructOrErr<MachO::twolevel_hints_command>(Obj, Load.Ptr);
|
|
if(!HintsOrErr)
|
|
return HintsOrErr.takeError();
|
|
MachO::twolevel_hints_command Hints = HintsOrErr.get();
|
|
uint64_t FileSize = Obj.getData().size();
|
|
if (Hints.offset > FileSize)
|
|
return malformedError("offset field of LC_TWOLEVEL_HINTS command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
uint64_t BigSize = Hints.nhints;
|
|
BigSize *= sizeof(MachO::twolevel_hint);
|
|
BigSize += Hints.offset;
|
|
if (BigSize > FileSize)
|
|
return malformedError("offset field plus nhints times sizeof(struct "
|
|
"twolevel_hint) field of LC_TWOLEVEL_HINTS command " +
|
|
Twine(LoadCommandIndex) + " extends past the end of "
|
|
"the file");
|
|
if (Error Err = checkOverlappingElement(Elements, Hints.offset, Hints.nhints *
|
|
sizeof(MachO::twolevel_hint),
|
|
"two level hints"))
|
|
return Err;
|
|
*LoadCmd = Load.Ptr;
|
|
return Error::success();
|
|
}
|
|
|
|
// Returns true if the libObject code does not support the load command and its
|
|
// contents. The cmd value it is treated as an unknown load command but with
|
|
// an error message that says the cmd value is obsolete.
|
|
static bool isLoadCommandObsolete(uint32_t cmd) {
|
|
if (cmd == MachO::LC_SYMSEG ||
|
|
cmd == MachO::LC_LOADFVMLIB ||
|
|
cmd == MachO::LC_IDFVMLIB ||
|
|
cmd == MachO::LC_IDENT ||
|
|
cmd == MachO::LC_FVMFILE ||
|
|
cmd == MachO::LC_PREPAGE ||
|
|
cmd == MachO::LC_PREBOUND_DYLIB ||
|
|
cmd == MachO::LC_TWOLEVEL_HINTS ||
|
|
cmd == MachO::LC_PREBIND_CKSUM)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
Expected<std::unique_ptr<MachOObjectFile>>
|
|
MachOObjectFile::create(MemoryBufferRef Object, bool IsLittleEndian,
|
|
bool Is64Bits, uint32_t UniversalCputype,
|
|
uint32_t UniversalIndex) {
|
|
Error Err = Error::success();
|
|
std::unique_ptr<MachOObjectFile> Obj(
|
|
new MachOObjectFile(std::move(Object), IsLittleEndian,
|
|
Is64Bits, Err, UniversalCputype,
|
|
UniversalIndex));
|
|
if (Err)
|
|
return std::move(Err);
|
|
return std::move(Obj);
|
|
}
|
|
|
|
MachOObjectFile::MachOObjectFile(MemoryBufferRef Object, bool IsLittleEndian,
|
|
bool Is64bits, Error &Err,
|
|
uint32_t UniversalCputype,
|
|
uint32_t UniversalIndex)
|
|
: ObjectFile(getMachOType(IsLittleEndian, Is64bits), Object) {
|
|
ErrorAsOutParameter ErrAsOutParam(&Err);
|
|
uint64_t SizeOfHeaders;
|
|
uint32_t cputype;
|
|
if (is64Bit()) {
|
|
parseHeader(*this, Header64, Err);
|
|
SizeOfHeaders = sizeof(MachO::mach_header_64);
|
|
cputype = Header64.cputype;
|
|
} else {
|
|
parseHeader(*this, Header, Err);
|
|
SizeOfHeaders = sizeof(MachO::mach_header);
|
|
cputype = Header.cputype;
|
|
}
|
|
if (Err)
|
|
return;
|
|
SizeOfHeaders += getHeader().sizeofcmds;
|
|
if (getData().data() + SizeOfHeaders > getData().end()) {
|
|
Err = malformedError("load commands extend past the end of the file");
|
|
return;
|
|
}
|
|
if (UniversalCputype != 0 && cputype != UniversalCputype) {
|
|
Err = malformedError("universal header architecture: " +
|
|
Twine(UniversalIndex) + "'s cputype does not match "
|
|
"object file's mach header");
|
|
return;
|
|
}
|
|
std::list<MachOElement> Elements;
|
|
Elements.push_back({0, SizeOfHeaders, "Mach-O headers"});
|
|
|
|
uint32_t LoadCommandCount = getHeader().ncmds;
|
|
LoadCommandInfo Load;
|
|
if (LoadCommandCount != 0) {
|
|
if (auto LoadOrErr = getFirstLoadCommandInfo(*this))
|
|
Load = *LoadOrErr;
|
|
else {
|
|
Err = LoadOrErr.takeError();
|
|
return;
|
|
}
|
|
}
|
|
|
|
const char *DyldIdLoadCmd = nullptr;
|
|
const char *FuncStartsLoadCmd = nullptr;
|
|
const char *SplitInfoLoadCmd = nullptr;
|
|
const char *CodeSignDrsLoadCmd = nullptr;
|
|
const char *CodeSignLoadCmd = nullptr;
|
|
const char *VersLoadCmd = nullptr;
|
|
const char *SourceLoadCmd = nullptr;
|
|
const char *EntryPointLoadCmd = nullptr;
|
|
const char *EncryptLoadCmd = nullptr;
|
|
const char *RoutinesLoadCmd = nullptr;
|
|
const char *UnixThreadLoadCmd = nullptr;
|
|
const char *TwoLevelHintsLoadCmd = nullptr;
|
|
for (unsigned I = 0; I < LoadCommandCount; ++I) {
|
|
if (is64Bit()) {
|
|
if (Load.C.cmdsize % 8 != 0) {
|
|
// We have a hack here to allow 64-bit Mach-O core files to have
|
|
// LC_THREAD commands that are only a multiple of 4 and not 8 to be
|
|
// allowed since the macOS kernel produces them.
|
|
if (getHeader().filetype != MachO::MH_CORE ||
|
|
Load.C.cmd != MachO::LC_THREAD || Load.C.cmdsize % 4) {
|
|
Err = malformedError("load command " + Twine(I) + " cmdsize not a "
|
|
"multiple of 8");
|
|
return;
|
|
}
|
|
}
|
|
} else {
|
|
if (Load.C.cmdsize % 4 != 0) {
|
|
Err = malformedError("load command " + Twine(I) + " cmdsize not a "
|
|
"multiple of 4");
|
|
return;
|
|
}
|
|
}
|
|
LoadCommands.push_back(Load);
|
|
if (Load.C.cmd == MachO::LC_SYMTAB) {
|
|
if ((Err = checkSymtabCommand(*this, Load, I, &SymtabLoadCmd, Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DYSYMTAB) {
|
|
if ((Err = checkDysymtabCommand(*this, Load, I, &DysymtabLoadCmd,
|
|
Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DATA_IN_CODE) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &DataInCodeLoadCmd,
|
|
"LC_DATA_IN_CODE", Elements,
|
|
"data in code info")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_LINKER_OPTIMIZATION_HINT) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &LinkOptHintsLoadCmd,
|
|
"LC_LINKER_OPTIMIZATION_HINT",
|
|
Elements, "linker optimization "
|
|
"hints")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_FUNCTION_STARTS) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &FuncStartsLoadCmd,
|
|
"LC_FUNCTION_STARTS", Elements,
|
|
"function starts data")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SEGMENT_SPLIT_INFO) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &SplitInfoLoadCmd,
|
|
"LC_SEGMENT_SPLIT_INFO", Elements,
|
|
"split info data")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DYLIB_CODE_SIGN_DRS) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &CodeSignDrsLoadCmd,
|
|
"LC_DYLIB_CODE_SIGN_DRS", Elements,
|
|
"code signing RDs data")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_CODE_SIGNATURE) {
|
|
if ((Err = checkLinkeditDataCommand(*this, Load, I, &CodeSignLoadCmd,
|
|
"LC_CODE_SIGNATURE", Elements,
|
|
"code signature data")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DYLD_INFO) {
|
|
if ((Err = checkDyldInfoCommand(*this, Load, I, &DyldInfoLoadCmd,
|
|
"LC_DYLD_INFO", Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DYLD_INFO_ONLY) {
|
|
if ((Err = checkDyldInfoCommand(*this, Load, I, &DyldInfoLoadCmd,
|
|
"LC_DYLD_INFO_ONLY", Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_UUID) {
|
|
if (Load.C.cmdsize != sizeof(MachO::uuid_command)) {
|
|
Err = malformedError("LC_UUID command " + Twine(I) + " has incorrect "
|
|
"cmdsize");
|
|
return;
|
|
}
|
|
if (UuidLoadCmd) {
|
|
Err = malformedError("more than one LC_UUID command");
|
|
return;
|
|
}
|
|
UuidLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_SEGMENT_64) {
|
|
if ((Err = parseSegmentLoadCommand<MachO::segment_command_64,
|
|
MachO::section_64>(
|
|
*this, Load, Sections, HasPageZeroSegment, I,
|
|
"LC_SEGMENT_64", SizeOfHeaders, Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SEGMENT) {
|
|
if ((Err = parseSegmentLoadCommand<MachO::segment_command,
|
|
MachO::section>(
|
|
*this, Load, Sections, HasPageZeroSegment, I,
|
|
"LC_SEGMENT", SizeOfHeaders, Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_ID_DYLIB) {
|
|
if ((Err = checkDylibIdCommand(*this, Load, I, &DyldIdLoadCmd)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_LOAD_DYLIB) {
|
|
if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_DYLIB")))
|
|
return;
|
|
Libraries.push_back(Load.Ptr);
|
|
} else if (Load.C.cmd == MachO::LC_LOAD_WEAK_DYLIB) {
|
|
if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_WEAK_DYLIB")))
|
|
return;
|
|
Libraries.push_back(Load.Ptr);
|
|
} else if (Load.C.cmd == MachO::LC_LAZY_LOAD_DYLIB) {
|
|
if ((Err = checkDylibCommand(*this, Load, I, "LC_LAZY_LOAD_DYLIB")))
|
|
return;
|
|
Libraries.push_back(Load.Ptr);
|
|
} else if (Load.C.cmd == MachO::LC_REEXPORT_DYLIB) {
|
|
if ((Err = checkDylibCommand(*this, Load, I, "LC_REEXPORT_DYLIB")))
|
|
return;
|
|
Libraries.push_back(Load.Ptr);
|
|
} else if (Load.C.cmd == MachO::LC_LOAD_UPWARD_DYLIB) {
|
|
if ((Err = checkDylibCommand(*this, Load, I, "LC_LOAD_UPWARD_DYLIB")))
|
|
return;
|
|
Libraries.push_back(Load.Ptr);
|
|
} else if (Load.C.cmd == MachO::LC_ID_DYLINKER) {
|
|
if ((Err = checkDyldCommand(*this, Load, I, "LC_ID_DYLINKER")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_LOAD_DYLINKER) {
|
|
if ((Err = checkDyldCommand(*this, Load, I, "LC_LOAD_DYLINKER")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_DYLD_ENVIRONMENT) {
|
|
if ((Err = checkDyldCommand(*this, Load, I, "LC_DYLD_ENVIRONMENT")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_VERSION_MIN_MACOSX) {
|
|
if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd,
|
|
"LC_VERSION_MIN_MACOSX")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_VERSION_MIN_IPHONEOS) {
|
|
if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd,
|
|
"LC_VERSION_MIN_IPHONEOS")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_VERSION_MIN_TVOS) {
|
|
if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd,
|
|
"LC_VERSION_MIN_TVOS")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_VERSION_MIN_WATCHOS) {
|
|
if ((Err = checkVersCommand(*this, Load, I, &VersLoadCmd,
|
|
"LC_VERSION_MIN_WATCHOS")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_NOTE) {
|
|
if ((Err = checkNoteCommand(*this, Load, I, Elements)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_BUILD_VERSION) {
|
|
if ((Err = parseBuildVersionCommand(*this, Load, BuildTools, I)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_RPATH) {
|
|
if ((Err = checkRpathCommand(*this, Load, I)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SOURCE_VERSION) {
|
|
if (Load.C.cmdsize != sizeof(MachO::source_version_command)) {
|
|
Err = malformedError("LC_SOURCE_VERSION command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
if (SourceLoadCmd) {
|
|
Err = malformedError("more than one LC_SOURCE_VERSION command");
|
|
return;
|
|
}
|
|
SourceLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_MAIN) {
|
|
if (Load.C.cmdsize != sizeof(MachO::entry_point_command)) {
|
|
Err = malformedError("LC_MAIN command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
if (EntryPointLoadCmd) {
|
|
Err = malformedError("more than one LC_MAIN command");
|
|
return;
|
|
}
|
|
EntryPointLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_ENCRYPTION_INFO) {
|
|
if (Load.C.cmdsize != sizeof(MachO::encryption_info_command)) {
|
|
Err = malformedError("LC_ENCRYPTION_INFO command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
MachO::encryption_info_command E =
|
|
getStruct<MachO::encryption_info_command>(*this, Load.Ptr);
|
|
if ((Err = checkEncryptCommand(*this, Load, I, E.cryptoff, E.cryptsize,
|
|
&EncryptLoadCmd, "LC_ENCRYPTION_INFO")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_ENCRYPTION_INFO_64) {
|
|
if (Load.C.cmdsize != sizeof(MachO::encryption_info_command_64)) {
|
|
Err = malformedError("LC_ENCRYPTION_INFO_64 command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
MachO::encryption_info_command_64 E =
|
|
getStruct<MachO::encryption_info_command_64>(*this, Load.Ptr);
|
|
if ((Err = checkEncryptCommand(*this, Load, I, E.cryptoff, E.cryptsize,
|
|
&EncryptLoadCmd, "LC_ENCRYPTION_INFO_64")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_LINKER_OPTION) {
|
|
if ((Err = checkLinkerOptCommand(*this, Load, I)))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SUB_FRAMEWORK) {
|
|
if (Load.C.cmdsize < sizeof(MachO::sub_framework_command)) {
|
|
Err = malformedError("load command " + Twine(I) +
|
|
" LC_SUB_FRAMEWORK cmdsize too small");
|
|
return;
|
|
}
|
|
MachO::sub_framework_command S =
|
|
getStruct<MachO::sub_framework_command>(*this, Load.Ptr);
|
|
if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_FRAMEWORK",
|
|
sizeof(MachO::sub_framework_command),
|
|
"sub_framework_command", S.umbrella,
|
|
"umbrella")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SUB_UMBRELLA) {
|
|
if (Load.C.cmdsize < sizeof(MachO::sub_umbrella_command)) {
|
|
Err = malformedError("load command " + Twine(I) +
|
|
" LC_SUB_UMBRELLA cmdsize too small");
|
|
return;
|
|
}
|
|
MachO::sub_umbrella_command S =
|
|
getStruct<MachO::sub_umbrella_command>(*this, Load.Ptr);
|
|
if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_UMBRELLA",
|
|
sizeof(MachO::sub_umbrella_command),
|
|
"sub_umbrella_command", S.sub_umbrella,
|
|
"sub_umbrella")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SUB_LIBRARY) {
|
|
if (Load.C.cmdsize < sizeof(MachO::sub_library_command)) {
|
|
Err = malformedError("load command " + Twine(I) +
|
|
" LC_SUB_LIBRARY cmdsize too small");
|
|
return;
|
|
}
|
|
MachO::sub_library_command S =
|
|
getStruct<MachO::sub_library_command>(*this, Load.Ptr);
|
|
if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_LIBRARY",
|
|
sizeof(MachO::sub_library_command),
|
|
"sub_library_command", S.sub_library,
|
|
"sub_library")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_SUB_CLIENT) {
|
|
if (Load.C.cmdsize < sizeof(MachO::sub_client_command)) {
|
|
Err = malformedError("load command " + Twine(I) +
|
|
" LC_SUB_CLIENT cmdsize too small");
|
|
return;
|
|
}
|
|
MachO::sub_client_command S =
|
|
getStruct<MachO::sub_client_command>(*this, Load.Ptr);
|
|
if ((Err = checkSubCommand(*this, Load, I, "LC_SUB_CLIENT",
|
|
sizeof(MachO::sub_client_command),
|
|
"sub_client_command", S.client, "client")))
|
|
return;
|
|
} else if (Load.C.cmd == MachO::LC_ROUTINES) {
|
|
if (Load.C.cmdsize != sizeof(MachO::routines_command)) {
|
|
Err = malformedError("LC_ROUTINES command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
if (RoutinesLoadCmd) {
|
|
Err = malformedError("more than one LC_ROUTINES and or LC_ROUTINES_64 "
|
|
"command");
|
|
return;
|
|
}
|
|
RoutinesLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_ROUTINES_64) {
|
|
if (Load.C.cmdsize != sizeof(MachO::routines_command_64)) {
|
|
Err = malformedError("LC_ROUTINES_64 command " + Twine(I) +
|
|
" has incorrect cmdsize");
|
|
return;
|
|
}
|
|
if (RoutinesLoadCmd) {
|
|
Err = malformedError("more than one LC_ROUTINES_64 and or LC_ROUTINES "
|
|
"command");
|
|
return;
|
|
}
|
|
RoutinesLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_UNIXTHREAD) {
|
|
if ((Err = checkThreadCommand(*this, Load, I, "LC_UNIXTHREAD")))
|
|
return;
|
|
if (UnixThreadLoadCmd) {
|
|
Err = malformedError("more than one LC_UNIXTHREAD command");
|
|
return;
|
|
}
|
|
UnixThreadLoadCmd = Load.Ptr;
|
|
} else if (Load.C.cmd == MachO::LC_THREAD) {
|
|
if ((Err = checkThreadCommand(*this, Load, I, "LC_THREAD")))
|
|
return;
|
|
// Note: LC_TWOLEVEL_HINTS is really obsolete and is not supported.
|
|
} else if (Load.C.cmd == MachO::LC_TWOLEVEL_HINTS) {
|
|
if ((Err = checkTwoLevelHintsCommand(*this, Load, I,
|
|
&TwoLevelHintsLoadCmd, Elements)))
|
|
return;
|
|
} else if (isLoadCommandObsolete(Load.C.cmd)) {
|
|
Err = malformedError("load command " + Twine(I) + " for cmd value of: " +
|
|
Twine(Load.C.cmd) + " is obsolete and not "
|
|
"supported");
|
|
return;
|
|
}
|
|
// TODO: generate a error for unknown load commands by default. But still
|
|
// need work out an approach to allow or not allow unknown values like this
|
|
// as an option for some uses like lldb.
|
|
if (I < LoadCommandCount - 1) {
|
|
if (auto LoadOrErr = getNextLoadCommandInfo(*this, I, Load))
|
|
Load = *LoadOrErr;
|
|
else {
|
|
Err = LoadOrErr.takeError();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if (!SymtabLoadCmd) {
|
|
if (DysymtabLoadCmd) {
|
|
Err = malformedError("contains LC_DYSYMTAB load command without a "
|
|
"LC_SYMTAB load command");
|
|
return;
|
|
}
|
|
} else if (DysymtabLoadCmd) {
|
|
MachO::symtab_command Symtab =
|
|
getStruct<MachO::symtab_command>(*this, SymtabLoadCmd);
|
|
MachO::dysymtab_command Dysymtab =
|
|
getStruct<MachO::dysymtab_command>(*this, DysymtabLoadCmd);
|
|
if (Dysymtab.nlocalsym != 0 && Dysymtab.ilocalsym > Symtab.nsyms) {
|
|
Err = malformedError("ilocalsym in LC_DYSYMTAB load command "
|
|
"extends past the end of the symbol table");
|
|
return;
|
|
}
|
|
uint64_t BigSize = Dysymtab.ilocalsym;
|
|
BigSize += Dysymtab.nlocalsym;
|
|
if (Dysymtab.nlocalsym != 0 && BigSize > Symtab.nsyms) {
|
|
Err = malformedError("ilocalsym plus nlocalsym in LC_DYSYMTAB load "
|
|
"command extends past the end of the symbol table");
|
|
return;
|
|
}
|
|
if (Dysymtab.nextdefsym != 0 && Dysymtab.iextdefsym > Symtab.nsyms) {
|
|
Err = malformedError("iextdefsym in LC_DYSYMTAB load command "
|
|
"extends past the end of the symbol table");
|
|
return;
|
|
}
|
|
BigSize = Dysymtab.iextdefsym;
|
|
BigSize += Dysymtab.nextdefsym;
|
|
if (Dysymtab.nextdefsym != 0 && BigSize > Symtab.nsyms) {
|
|
Err = malformedError("iextdefsym plus nextdefsym in LC_DYSYMTAB "
|
|
"load command extends past the end of the symbol "
|
|
"table");
|
|
return;
|
|
}
|
|
if (Dysymtab.nundefsym != 0 && Dysymtab.iundefsym > Symtab.nsyms) {
|
|
Err = malformedError("iundefsym in LC_DYSYMTAB load command "
|
|
"extends past the end of the symbol table");
|
|
return;
|
|
}
|
|
BigSize = Dysymtab.iundefsym;
|
|
BigSize += Dysymtab.nundefsym;
|
|
if (Dysymtab.nundefsym != 0 && BigSize > Symtab.nsyms) {
|
|
Err = malformedError("iundefsym plus nundefsym in LC_DYSYMTAB load "
|
|
" command extends past the end of the symbol table");
|
|
return;
|
|
}
|
|
}
|
|
if ((getHeader().filetype == MachO::MH_DYLIB ||
|
|
getHeader().filetype == MachO::MH_DYLIB_STUB) &&
|
|
DyldIdLoadCmd == nullptr) {
|
|
Err = malformedError("no LC_ID_DYLIB load command in dynamic library "
|
|
"filetype");
|
|
return;
|
|
}
|
|
assert(LoadCommands.size() == LoadCommandCount);
|
|
|
|
Err = Error::success();
|
|
}
|
|
|
|
Error MachOObjectFile::checkSymbolTable() const {
|
|
uint32_t Flags = 0;
|
|
if (is64Bit()) {
|
|
MachO::mach_header_64 H_64 = MachOObjectFile::getHeader64();
|
|
Flags = H_64.flags;
|
|
} else {
|
|
MachO::mach_header H = MachOObjectFile::getHeader();
|
|
Flags = H.flags;
|
|
}
|
|
uint8_t NType = 0;
|
|
uint8_t NSect = 0;
|
|
uint16_t NDesc = 0;
|
|
uint32_t NStrx = 0;
|
|
uint64_t NValue = 0;
|
|
uint32_t SymbolIndex = 0;
|
|
MachO::symtab_command S = getSymtabLoadCommand();
|
|
for (const SymbolRef &Symbol : symbols()) {
|
|
DataRefImpl SymDRI = Symbol.getRawDataRefImpl();
|
|
if (is64Bit()) {
|
|
MachO::nlist_64 STE_64 = getSymbol64TableEntry(SymDRI);
|
|
NType = STE_64.n_type;
|
|
NSect = STE_64.n_sect;
|
|
NDesc = STE_64.n_desc;
|
|
NStrx = STE_64.n_strx;
|
|
NValue = STE_64.n_value;
|
|
} else {
|
|
MachO::nlist STE = getSymbolTableEntry(SymDRI);
|
|
NType = STE.n_type;
|
|
NSect = STE.n_sect;
|
|
NDesc = STE.n_desc;
|
|
NStrx = STE.n_strx;
|
|
NValue = STE.n_value;
|
|
}
|
|
if ((NType & MachO::N_STAB) == 0) {
|
|
if ((NType & MachO::N_TYPE) == MachO::N_SECT) {
|
|
if (NSect == 0 || NSect > Sections.size())
|
|
return malformedError("bad section index: " + Twine((int)NSect) +
|
|
" for symbol at index " + Twine(SymbolIndex));
|
|
}
|
|
if ((NType & MachO::N_TYPE) == MachO::N_INDR) {
|
|
if (NValue >= S.strsize)
|
|
return malformedError("bad n_value: " + Twine((int)NValue) + " past "
|
|
"the end of string table, for N_INDR symbol at "
|
|
"index " + Twine(SymbolIndex));
|
|
}
|
|
if ((Flags & MachO::MH_TWOLEVEL) == MachO::MH_TWOLEVEL &&
|
|
(((NType & MachO::N_TYPE) == MachO::N_UNDF && NValue == 0) ||
|
|
(NType & MachO::N_TYPE) == MachO::N_PBUD)) {
|
|
uint32_t LibraryOrdinal = MachO::GET_LIBRARY_ORDINAL(NDesc);
|
|
if (LibraryOrdinal != 0 &&
|
|
LibraryOrdinal != MachO::EXECUTABLE_ORDINAL &&
|
|
LibraryOrdinal != MachO::DYNAMIC_LOOKUP_ORDINAL &&
|
|
LibraryOrdinal - 1 >= Libraries.size() ) {
|
|
return malformedError("bad library ordinal: " + Twine(LibraryOrdinal) +
|
|
" for symbol at index " + Twine(SymbolIndex));
|
|
}
|
|
}
|
|
}
|
|
if (NStrx >= S.strsize)
|
|
return malformedError("bad string table index: " + Twine((int)NStrx) +
|
|
" past the end of string table, for symbol at "
|
|
"index " + Twine(SymbolIndex));
|
|
SymbolIndex++;
|
|
}
|
|
return Error::success();
|
|
}
|
|
|
|
void MachOObjectFile::moveSymbolNext(DataRefImpl &Symb) const {
|
|
unsigned SymbolTableEntrySize = is64Bit() ?
|
|
sizeof(MachO::nlist_64) :
|
|
sizeof(MachO::nlist);
|
|
Symb.p += SymbolTableEntrySize;
|
|
}
|
|
|
|
Expected<StringRef> MachOObjectFile::getSymbolName(DataRefImpl Symb) const {
|
|
StringRef StringTable = getStringTableData();
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb);
|
|
if (Entry.n_strx == 0)
|
|
// A n_strx value of 0 indicates that no name is associated with a
|
|
// particular symbol table entry.
|
|
return StringRef();
|
|
const char *Start = &StringTable.data()[Entry.n_strx];
|
|
if (Start < getData().begin() || Start >= getData().end()) {
|
|
return malformedError("bad string index: " + Twine(Entry.n_strx) +
|
|
" for symbol at index " + Twine(getSymbolIndex(Symb)));
|
|
}
|
|
return StringRef(Start);
|
|
}
|
|
|
|
unsigned MachOObjectFile::getSectionType(SectionRef Sec) const {
|
|
DataRefImpl DRI = Sec.getRawDataRefImpl();
|
|
uint32_t Flags = getSectionFlags(*this, DRI);
|
|
return Flags & MachO::SECTION_TYPE;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getNValue(DataRefImpl Sym) const {
|
|
if (is64Bit()) {
|
|
MachO::nlist_64 Entry = getSymbol64TableEntry(Sym);
|
|
return Entry.n_value;
|
|
}
|
|
MachO::nlist Entry = getSymbolTableEntry(Sym);
|
|
return Entry.n_value;
|
|
}
|
|
|
|
// getIndirectName() returns the name of the alias'ed symbol who's string table
|
|
// index is in the n_value field.
|
|
std::error_code MachOObjectFile::getIndirectName(DataRefImpl Symb,
|
|
StringRef &Res) const {
|
|
StringRef StringTable = getStringTableData();
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb);
|
|
if ((Entry.n_type & MachO::N_TYPE) != MachO::N_INDR)
|
|
return object_error::parse_failed;
|
|
uint64_t NValue = getNValue(Symb);
|
|
if (NValue >= StringTable.size())
|
|
return object_error::parse_failed;
|
|
const char *Start = &StringTable.data()[NValue];
|
|
Res = StringRef(Start);
|
|
return std::error_code();
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSymbolValueImpl(DataRefImpl Sym) const {
|
|
return getNValue(Sym);
|
|
}
|
|
|
|
Expected<uint64_t> MachOObjectFile::getSymbolAddress(DataRefImpl Sym) const {
|
|
return getSymbolValue(Sym);
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getSymbolAlignment(DataRefImpl DRI) const {
|
|
uint32_t flags = getSymbolFlags(DRI);
|
|
if (flags & SymbolRef::SF_Common) {
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, DRI);
|
|
return 1 << MachO::GET_COMM_ALIGN(Entry.n_desc);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getCommonSymbolSizeImpl(DataRefImpl DRI) const {
|
|
return getNValue(DRI);
|
|
}
|
|
|
|
Expected<SymbolRef::Type>
|
|
MachOObjectFile::getSymbolType(DataRefImpl Symb) const {
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb);
|
|
uint8_t n_type = Entry.n_type;
|
|
|
|
// If this is a STAB debugging symbol, we can do nothing more.
|
|
if (n_type & MachO::N_STAB)
|
|
return SymbolRef::ST_Debug;
|
|
|
|
switch (n_type & MachO::N_TYPE) {
|
|
case MachO::N_UNDF :
|
|
return SymbolRef::ST_Unknown;
|
|
case MachO::N_SECT :
|
|
Expected<section_iterator> SecOrError = getSymbolSection(Symb);
|
|
if (!SecOrError)
|
|
return SecOrError.takeError();
|
|
section_iterator Sec = *SecOrError;
|
|
if (Sec->isData() || Sec->isBSS())
|
|
return SymbolRef::ST_Data;
|
|
return SymbolRef::ST_Function;
|
|
}
|
|
return SymbolRef::ST_Other;
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getSymbolFlags(DataRefImpl DRI) const {
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, DRI);
|
|
|
|
uint8_t MachOType = Entry.n_type;
|
|
uint16_t MachOFlags = Entry.n_desc;
|
|
|
|
uint32_t Result = SymbolRef::SF_None;
|
|
|
|
if ((MachOType & MachO::N_TYPE) == MachO::N_INDR)
|
|
Result |= SymbolRef::SF_Indirect;
|
|
|
|
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) {
|
|
if (getNValue(DRI))
|
|
Result |= SymbolRef::SF_Common;
|
|
else
|
|
Result |= SymbolRef::SF_Undefined;
|
|
}
|
|
|
|
if (!(MachOType & MachO::N_PEXT))
|
|
Result |= SymbolRef::SF_Exported;
|
|
}
|
|
|
|
if (MachOFlags & (MachO::N_WEAK_REF | MachO::N_WEAK_DEF))
|
|
Result |= SymbolRef::SF_Weak;
|
|
|
|
if (MachOFlags & (MachO::N_ARM_THUMB_DEF))
|
|
Result |= SymbolRef::SF_Thumb;
|
|
|
|
if ((MachOType & MachO::N_TYPE) == MachO::N_ABS)
|
|
Result |= SymbolRef::SF_Absolute;
|
|
|
|
return Result;
|
|
}
|
|
|
|
Expected<section_iterator>
|
|
MachOObjectFile::getSymbolSection(DataRefImpl Symb) const {
|
|
MachO::nlist_base Entry = getSymbolTableEntryBase(*this, Symb);
|
|
uint8_t index = Entry.n_sect;
|
|
|
|
if (index == 0)
|
|
return section_end();
|
|
DataRefImpl DRI;
|
|
DRI.d.a = index - 1;
|
|
if (DRI.d.a >= Sections.size()){
|
|
return malformedError("bad section index: " + Twine((int)index) +
|
|
" for symbol at index " + Twine(getSymbolIndex(Symb)));
|
|
}
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
unsigned MachOObjectFile::getSymbolSectionID(SymbolRef Sym) const {
|
|
MachO::nlist_base Entry =
|
|
getSymbolTableEntryBase(*this, Sym.getRawDataRefImpl());
|
|
return Entry.n_sect - 1;
|
|
}
|
|
|
|
void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const {
|
|
Sec.d.a++;
|
|
}
|
|
|
|
Expected<StringRef> MachOObjectFile::getSectionName(DataRefImpl Sec) const {
|
|
ArrayRef<char> Raw = getSectionRawName(Sec);
|
|
return parseSegmentOrSectionName(Raw.data());
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionAddress(DataRefImpl Sec) const {
|
|
if (is64Bit())
|
|
return getSection64(Sec).addr;
|
|
return getSection(Sec).addr;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const {
|
|
return Sec.d.a;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionSize(DataRefImpl Sec) const {
|
|
// In the case if a malformed Mach-O file where the section offset is past
|
|
// the end of the file or some part of the section size is past the end of
|
|
// the file return a size of zero or a size that covers the rest of the file
|
|
// but does not extend past the end of the file.
|
|
uint32_t SectOffset, SectType;
|
|
uint64_t SectSize;
|
|
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
SectOffset = Sect.offset;
|
|
SectSize = Sect.size;
|
|
SectType = Sect.flags & MachO::SECTION_TYPE;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
SectOffset = Sect.offset;
|
|
SectSize = Sect.size;
|
|
SectType = Sect.flags & MachO::SECTION_TYPE;
|
|
}
|
|
if (SectType == MachO::S_ZEROFILL || SectType == MachO::S_GB_ZEROFILL)
|
|
return SectSize;
|
|
uint64_t FileSize = getData().size();
|
|
if (SectOffset > FileSize)
|
|
return 0;
|
|
if (FileSize - SectOffset < SectSize)
|
|
return FileSize - SectOffset;
|
|
return SectSize;
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getSectionContents(uint32_t Offset,
|
|
uint64_t Size) const {
|
|
return arrayRefFromStringRef(getData().substr(Offset, Size));
|
|
}
|
|
|
|
Expected<ArrayRef<uint8_t>>
|
|
MachOObjectFile::getSectionContents(DataRefImpl Sec) 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;
|
|
}
|
|
|
|
return getSectionContents(Offset, Size);
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSectionAlignment(DataRefImpl Sec) const {
|
|
uint32_t Align;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Align = Sect.align;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Align = Sect.align;
|
|
}
|
|
|
|
return uint64_t(1) << Align;
|
|
}
|
|
|
|
Expected<SectionRef> MachOObjectFile::getSection(unsigned SectionIndex) const {
|
|
if (SectionIndex < 1 || SectionIndex > Sections.size())
|
|
return malformedError("bad section index: " + Twine((int)SectionIndex));
|
|
|
|
DataRefImpl DRI;
|
|
DRI.d.a = SectionIndex - 1;
|
|
return SectionRef(DRI, this);
|
|
}
|
|
|
|
Expected<SectionRef> MachOObjectFile::getSection(StringRef SectionName) const {
|
|
for (const SectionRef &Section : sections()) {
|
|
auto NameOrErr = Section.getName();
|
|
if (!NameOrErr)
|
|
return NameOrErr.takeError();
|
|
if (*NameOrErr == SectionName)
|
|
return Section;
|
|
}
|
|
return errorCodeToError(object_error::parse_failed);
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionCompressed(DataRefImpl Sec) const {
|
|
return false;
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionText(DataRefImpl Sec) const {
|
|
uint32_t Flags = getSectionFlags(*this, Sec);
|
|
return Flags & MachO::S_ATTR_PURE_INSTRUCTIONS;
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionData(DataRefImpl Sec) const {
|
|
uint32_t Flags = getSectionFlags(*this, Sec);
|
|
unsigned SectionType = Flags & MachO::SECTION_TYPE;
|
|
return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
|
|
!(SectionType == MachO::S_ZEROFILL ||
|
|
SectionType == MachO::S_GB_ZEROFILL);
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionBSS(DataRefImpl Sec) const {
|
|
uint32_t Flags = getSectionFlags(*this, Sec);
|
|
unsigned SectionType = Flags & MachO::SECTION_TYPE;
|
|
return !(Flags & MachO::S_ATTR_PURE_INSTRUCTIONS) &&
|
|
(SectionType == MachO::S_ZEROFILL ||
|
|
SectionType == MachO::S_GB_ZEROFILL);
|
|
}
|
|
|
|
bool MachOObjectFile::isDebugSection(StringRef SectionName) const {
|
|
return SectionName.startswith("__debug") ||
|
|
SectionName.startswith("__zdebug") || SectionName == "__gdb_index";
|
|
}
|
|
|
|
unsigned MachOObjectFile::getSectionID(SectionRef Sec) const {
|
|
return Sec.getRawDataRefImpl().d.a;
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionVirtual(DataRefImpl Sec) const {
|
|
uint32_t Flags = getSectionFlags(*this, Sec);
|
|
unsigned SectionType = Flags & MachO::SECTION_TYPE;
|
|
return SectionType == MachO::S_ZEROFILL ||
|
|
SectionType == MachO::S_GB_ZEROFILL;
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionBitcode(DataRefImpl Sec) const {
|
|
StringRef SegmentName = getSectionFinalSegmentName(Sec);
|
|
if (Expected<StringRef> NameOrErr = getSectionName(Sec))
|
|
return (SegmentName == "__LLVM" && *NameOrErr == "__bitcode");
|
|
return false;
|
|
}
|
|
|
|
bool MachOObjectFile::isSectionStripped(DataRefImpl Sec) const {
|
|
if (is64Bit())
|
|
return getSection64(Sec).offset == 0;
|
|
return getSection(Sec).offset == 0;
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::section_rel_begin(DataRefImpl Sec) const {
|
|
DataRefImpl Ret;
|
|
Ret.d.a = Sec.d.a;
|
|
Ret.d.b = 0;
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator
|
|
MachOObjectFile::section_rel_end(DataRefImpl Sec) const {
|
|
uint32_t Num;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Num = Sect.nreloc;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Num = Sect.nreloc;
|
|
}
|
|
|
|
DataRefImpl Ret;
|
|
Ret.d.a = Sec.d.a;
|
|
Ret.d.b = Num;
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::extrel_begin() const {
|
|
DataRefImpl Ret;
|
|
// for DYSYMTAB symbols, Ret.d.a == 0 for external relocations
|
|
Ret.d.a = 0; // Would normally be a section index.
|
|
Ret.d.b = 0; // Index into the external relocations
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::extrel_end() const {
|
|
MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand();
|
|
DataRefImpl Ret;
|
|
// for DYSYMTAB symbols, Ret.d.a == 0 for external relocations
|
|
Ret.d.a = 0; // Would normally be a section index.
|
|
Ret.d.b = DysymtabLoadCmd.nextrel; // Index into the external relocations
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::locrel_begin() const {
|
|
DataRefImpl Ret;
|
|
// for DYSYMTAB symbols, Ret.d.a == 1 for local relocations
|
|
Ret.d.a = 1; // Would normally be a section index.
|
|
Ret.d.b = 0; // Index into the local relocations
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::locrel_end() const {
|
|
MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand();
|
|
DataRefImpl Ret;
|
|
// for DYSYMTAB symbols, Ret.d.a == 1 for local relocations
|
|
Ret.d.a = 1; // Would normally be a section index.
|
|
Ret.d.b = DysymtabLoadCmd.nlocrel; // Index into the local relocations
|
|
return relocation_iterator(RelocationRef(Ret, this));
|
|
}
|
|
|
|
void MachOObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
|
|
++Rel.d.b;
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getRelocationOffset(DataRefImpl Rel) const {
|
|
assert((getHeader().filetype == MachO::MH_OBJECT ||
|
|
getHeader().filetype == MachO::MH_KEXT_BUNDLE) &&
|
|
"Only implemented for MH_OBJECT && MH_KEXT_BUNDLE");
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
return getAnyRelocationAddress(RE);
|
|
}
|
|
|
|
symbol_iterator
|
|
MachOObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
if (isRelocationScattered(RE))
|
|
return symbol_end();
|
|
|
|
uint32_t SymbolIdx = getPlainRelocationSymbolNum(RE);
|
|
bool isExtern = getPlainRelocationExternal(RE);
|
|
if (!isExtern)
|
|
return symbol_end();
|
|
|
|
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));
|
|
}
|
|
|
|
section_iterator
|
|
MachOObjectFile::getRelocationSection(DataRefImpl Rel) const {
|
|
return section_iterator(getAnyRelocationSection(getRelocation(Rel)));
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getRelocationType(DataRefImpl Rel) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
return getAnyRelocationType(RE);
|
|
}
|
|
|
|
void MachOObjectFile::getRelocationTypeName(
|
|
DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
|
|
StringRef res;
|
|
uint64_t RType = getRelocationType(Rel);
|
|
|
|
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 > 5)
|
|
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::aarch64:
|
|
case Triple::aarch64_32: {
|
|
static const char *const Table[] = {
|
|
"ARM64_RELOC_UNSIGNED", "ARM64_RELOC_SUBTRACTOR",
|
|
"ARM64_RELOC_BRANCH26", "ARM64_RELOC_PAGE21",
|
|
"ARM64_RELOC_PAGEOFF12", "ARM64_RELOC_GOT_LOAD_PAGE21",
|
|
"ARM64_RELOC_GOT_LOAD_PAGEOFF12", "ARM64_RELOC_POINTER_TO_GOT",
|
|
"ARM64_RELOC_TLVP_LOAD_PAGE21", "ARM64_RELOC_TLVP_LOAD_PAGEOFF12",
|
|
"ARM64_RELOC_ADDEND"
|
|
};
|
|
|
|
if (RType >= array_lengthof(Table))
|
|
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" };
|
|
|
|
if (RType > 15)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[RType];
|
|
break;
|
|
}
|
|
case Triple::UnknownArch:
|
|
res = "Unknown";
|
|
break;
|
|
}
|
|
Result.append(res.begin(), res.end());
|
|
}
|
|
|
|
uint8_t MachOObjectFile::getRelocationLength(DataRefImpl Rel) const {
|
|
MachO::any_relocation_info RE = getRelocation(Rel);
|
|
return getAnyRelocationLength(RE);
|
|
}
|
|
|
|
//
|
|
// guessLibraryShortName() is passed a name of a dynamic library and returns a
|
|
// guess on what the short name is. Then name is returned as a substring of the
|
|
// StringRef Name passed in. The name of the dynamic library is recognized as
|
|
// a framework if it has one of the two following forms:
|
|
// Foo.framework/Versions/A/Foo
|
|
// Foo.framework/Foo
|
|
// Where A and Foo can be any string. And may contain a trailing suffix
|
|
// starting with an underbar. If the Name is recognized as a framework then
|
|
// isFramework is set to true else it is set to false. If the Name has a
|
|
// suffix then Suffix is set to the substring in Name that contains the suffix
|
|
// else it is set to a NULL StringRef.
|
|
//
|
|
// The Name of the dynamic library is recognized as a library name if it has
|
|
// one of the two following forms:
|
|
// libFoo.A.dylib
|
|
// libFoo.dylib
|
|
//
|
|
// The library may have a suffix trailing the name Foo of the form:
|
|
// libFoo_profile.A.dylib
|
|
// libFoo_profile.dylib
|
|
// These dyld image suffixes are separated from the short name by a '_'
|
|
// character. Because the '_' character is commonly used to separate words in
|
|
// filenames guessLibraryShortName() cannot reliably separate a dylib's short
|
|
// name from an arbitrary image suffix; imagine if both the short name and the
|
|
// suffix contains an '_' character! To better deal with this ambiguity,
|
|
// guessLibraryShortName() will recognize only "_debug" and "_profile" as valid
|
|
// Suffix values. Calling code needs to be tolerant of guessLibraryShortName()
|
|
// guessing incorrectly.
|
|
//
|
|
// The Name of the dynamic library is also recognized as a library name if it
|
|
// has the following form:
|
|
// Foo.qtx
|
|
//
|
|
// If the Name of the dynamic library is none of the forms above then a NULL
|
|
// StringRef is returned.
|
|
StringRef MachOObjectFile::guessLibraryShortName(StringRef Name,
|
|
bool &isFramework,
|
|
StringRef &Suffix) {
|
|
StringRef Foo, F, DotFramework, V, Dylib, Lib, Dot, Qtx;
|
|
size_t a, b, c, d, Idx;
|
|
|
|
isFramework = false;
|
|
Suffix = StringRef();
|
|
|
|
// Pull off the last component and make Foo point to it
|
|
a = Name.rfind('/');
|
|
if (a == Name.npos || a == 0)
|
|
goto guess_library;
|
|
Foo = Name.slice(a+1, Name.npos);
|
|
|
|
// Look for a suffix starting with a '_'
|
|
Idx = Foo.rfind('_');
|
|
if (Idx != Foo.npos && Foo.size() >= 2) {
|
|
Suffix = Foo.slice(Idx, Foo.npos);
|
|
if (Suffix != "_debug" && Suffix != "_profile")
|
|
Suffix = StringRef();
|
|
else
|
|
Foo = Foo.slice(0, Idx);
|
|
}
|
|
|
|
// First look for the form Foo.framework/Foo
|
|
b = Name.rfind('/', a);
|
|
if (b == Name.npos)
|
|
Idx = 0;
|
|
else
|
|
Idx = b+1;
|
|
F = Name.slice(Idx, Idx + Foo.size());
|
|
DotFramework = Name.slice(Idx + Foo.size(),
|
|
Idx + Foo.size() + sizeof(".framework/")-1);
|
|
if (F == Foo && DotFramework == ".framework/") {
|
|
isFramework = true;
|
|
return Foo;
|
|
}
|
|
|
|
// Next look for the form Foo.framework/Versions/A/Foo
|
|
if (b == Name.npos)
|
|
goto guess_library;
|
|
c = Name.rfind('/', b);
|
|
if (c == Name.npos || c == 0)
|
|
goto guess_library;
|
|
V = Name.slice(c+1, Name.npos);
|
|
if (!V.startswith("Versions/"))
|
|
goto guess_library;
|
|
d = Name.rfind('/', c);
|
|
if (d == Name.npos)
|
|
Idx = 0;
|
|
else
|
|
Idx = d+1;
|
|
F = Name.slice(Idx, Idx + Foo.size());
|
|
DotFramework = Name.slice(Idx + Foo.size(),
|
|
Idx + Foo.size() + sizeof(".framework/")-1);
|
|
if (F == Foo && DotFramework == ".framework/") {
|
|
isFramework = true;
|
|
return Foo;
|
|
}
|
|
|
|
guess_library:
|
|
// pull off the suffix after the "." and make a point to it
|
|
a = Name.rfind('.');
|
|
if (a == Name.npos || a == 0)
|
|
return StringRef();
|
|
Dylib = Name.slice(a, Name.npos);
|
|
if (Dylib != ".dylib")
|
|
goto guess_qtx;
|
|
|
|
// First pull off the version letter for the form Foo.A.dylib if any.
|
|
if (a >= 3) {
|
|
Dot = Name.slice(a-2, a-1);
|
|
if (Dot == ".")
|
|
a = a - 2;
|
|
}
|
|
|
|
b = Name.rfind('/', a);
|
|
if (b == Name.npos)
|
|
b = 0;
|
|
else
|
|
b = b+1;
|
|
// ignore any suffix after an underbar like Foo_profile.A.dylib
|
|
Idx = Name.rfind('_');
|
|
if (Idx != Name.npos && Idx != b) {
|
|
Lib = Name.slice(b, Idx);
|
|
Suffix = Name.slice(Idx, a);
|
|
if (Suffix != "_debug" && Suffix != "_profile") {
|
|
Suffix = StringRef();
|
|
Lib = Name.slice(b, a);
|
|
}
|
|
}
|
|
else
|
|
Lib = Name.slice(b, a);
|
|
// There are incorrect library names of the form:
|
|
// libATS.A_profile.dylib so check for these.
|
|
if (Lib.size() >= 3) {
|
|
Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
|
|
if (Dot == ".")
|
|
Lib = Lib.slice(0, Lib.size()-2);
|
|
}
|
|
return Lib;
|
|
|
|
guess_qtx:
|
|
Qtx = Name.slice(a, Name.npos);
|
|
if (Qtx != ".qtx")
|
|
return StringRef();
|
|
b = Name.rfind('/', a);
|
|
if (b == Name.npos)
|
|
Lib = Name.slice(0, a);
|
|
else
|
|
Lib = Name.slice(b+1, a);
|
|
// There are library names of the form: QT.A.qtx so check for these.
|
|
if (Lib.size() >= 3) {
|
|
Dot = Lib.slice(Lib.size()-2, Lib.size()-1);
|
|
if (Dot == ".")
|
|
Lib = Lib.slice(0, Lib.size()-2);
|
|
}
|
|
return Lib;
|
|
}
|
|
|
|
// getLibraryShortNameByIndex() is used to get the short name of the library
|
|
// for an undefined symbol in a linked Mach-O binary that was linked with the
|
|
// normal two-level namespace default (that is MH_TWOLEVEL in the header).
|
|
// It is passed the index (0 - based) of the library as translated from
|
|
// GET_LIBRARY_ORDINAL (1 - based).
|
|
std::error_code MachOObjectFile::getLibraryShortNameByIndex(unsigned Index,
|
|
StringRef &Res) const {
|
|
if (Index >= Libraries.size())
|
|
return object_error::parse_failed;
|
|
|
|
// If the cache of LibrariesShortNames is not built up do that first for
|
|
// all the Libraries.
|
|
if (LibrariesShortNames.size() == 0) {
|
|
for (unsigned i = 0; i < Libraries.size(); i++) {
|
|
auto CommandOrErr =
|
|
getStructOrErr<MachO::dylib_command>(*this, Libraries[i]);
|
|
if (!CommandOrErr)
|
|
return object_error::parse_failed;
|
|
MachO::dylib_command D = CommandOrErr.get();
|
|
if (D.dylib.name >= D.cmdsize)
|
|
return object_error::parse_failed;
|
|
const char *P = (const char *)(Libraries[i]) + D.dylib.name;
|
|
StringRef Name = StringRef(P);
|
|
if (D.dylib.name+Name.size() >= D.cmdsize)
|
|
return object_error::parse_failed;
|
|
StringRef Suffix;
|
|
bool isFramework;
|
|
StringRef shortName = guessLibraryShortName(Name, isFramework, Suffix);
|
|
if (shortName.empty())
|
|
LibrariesShortNames.push_back(Name);
|
|
else
|
|
LibrariesShortNames.push_back(shortName);
|
|
}
|
|
}
|
|
|
|
Res = LibrariesShortNames[Index];
|
|
return std::error_code();
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getLibraryCount() const {
|
|
return Libraries.size();
|
|
}
|
|
|
|
section_iterator
|
|
MachOObjectFile::getRelocationRelocatedSection(relocation_iterator Rel) const {
|
|
DataRefImpl Sec;
|
|
Sec.d.a = Rel->getRawDataRefImpl().d.a;
|
|
return section_iterator(SectionRef(Sec, this));
|
|
}
|
|
|
|
basic_symbol_iterator MachOObjectFile::symbol_begin() const {
|
|
DataRefImpl DRI;
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
if (!SymtabLoadCmd || Symtab.nsyms == 0)
|
|
return basic_symbol_iterator(SymbolRef(DRI, this));
|
|
|
|
return getSymbolByIndex(0);
|
|
}
|
|
|
|
basic_symbol_iterator MachOObjectFile::symbol_end() const {
|
|
DataRefImpl DRI;
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
if (!SymtabLoadCmd || Symtab.nsyms == 0)
|
|
return basic_symbol_iterator(SymbolRef(DRI, this));
|
|
|
|
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 basic_symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
symbol_iterator MachOObjectFile::getSymbolByIndex(unsigned Index) const {
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
if (!SymtabLoadCmd || Index >= Symtab.nsyms)
|
|
report_fatal_error("Requested symbol index is out of range.");
|
|
unsigned SymbolTableEntrySize =
|
|
is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist);
|
|
DataRefImpl DRI;
|
|
DRI.p = reinterpret_cast<uintptr_t>(getPtr(*this, Symtab.symoff));
|
|
DRI.p += Index * SymbolTableEntrySize;
|
|
return basic_symbol_iterator(SymbolRef(DRI, this));
|
|
}
|
|
|
|
uint64_t MachOObjectFile::getSymbolIndex(DataRefImpl Symb) const {
|
|
MachO::symtab_command Symtab = getSymtabLoadCommand();
|
|
if (!SymtabLoadCmd)
|
|
report_fatal_error("getSymbolIndex() called with no symbol table symbol");
|
|
unsigned SymbolTableEntrySize =
|
|
is64Bit() ? sizeof(MachO::nlist_64) : sizeof(MachO::nlist);
|
|
DataRefImpl DRIstart;
|
|
DRIstart.p = reinterpret_cast<uintptr_t>(getPtr(*this, Symtab.symoff));
|
|
uint64_t Index = (Symb.p - DRIstart.p) / SymbolTableEntrySize;
|
|
return Index;
|
|
}
|
|
|
|
section_iterator MachOObjectFile::section_begin() const {
|
|
DataRefImpl DRI;
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
section_iterator MachOObjectFile::section_end() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = Sections.size();
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
uint8_t MachOObjectFile::getBytesInAddress() const {
|
|
return is64Bit() ? 8 : 4;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getFileFormatName() const {
|
|
unsigned CPUType = getCPUType(*this);
|
|
if (!is64Bit()) {
|
|
switch (CPUType) {
|
|
case MachO::CPU_TYPE_I386:
|
|
return "Mach-O 32-bit i386";
|
|
case MachO::CPU_TYPE_ARM:
|
|
return "Mach-O arm";
|
|
case MachO::CPU_TYPE_ARM64_32:
|
|
return "Mach-O arm64 (ILP32)";
|
|
case MachO::CPU_TYPE_POWERPC:
|
|
return "Mach-O 32-bit ppc";
|
|
default:
|
|
return "Mach-O 32-bit unknown";
|
|
}
|
|
}
|
|
|
|
switch (CPUType) {
|
|
case MachO::CPU_TYPE_X86_64:
|
|
return "Mach-O 64-bit x86-64";
|
|
case MachO::CPU_TYPE_ARM64:
|
|
return "Mach-O arm64";
|
|
case MachO::CPU_TYPE_POWERPC64:
|
|
return "Mach-O 64-bit ppc64";
|
|
default:
|
|
return "Mach-O 64-bit unknown";
|
|
}
|
|
}
|
|
|
|
Triple::ArchType MachOObjectFile::getArch(uint32_t CPUType, uint32_t CPUSubType) {
|
|
switch (CPUType) {
|
|
case MachO::CPU_TYPE_I386:
|
|
return Triple::x86;
|
|
case MachO::CPU_TYPE_X86_64:
|
|
return Triple::x86_64;
|
|
case MachO::CPU_TYPE_ARM:
|
|
return Triple::arm;
|
|
case MachO::CPU_TYPE_ARM64:
|
|
return Triple::aarch64;
|
|
case MachO::CPU_TYPE_ARM64_32:
|
|
return Triple::aarch64_32;
|
|
case MachO::CPU_TYPE_POWERPC:
|
|
return Triple::ppc;
|
|
case MachO::CPU_TYPE_POWERPC64:
|
|
return Triple::ppc64;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
Triple MachOObjectFile::getArchTriple(uint32_t CPUType, uint32_t CPUSubType,
|
|
const char **McpuDefault,
|
|
const char **ArchFlag) {
|
|
if (McpuDefault)
|
|
*McpuDefault = nullptr;
|
|
if (ArchFlag)
|
|
*ArchFlag = nullptr;
|
|
|
|
switch (CPUType) {
|
|
case MachO::CPU_TYPE_I386:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_I386_ALL:
|
|
if (ArchFlag)
|
|
*ArchFlag = "i386";
|
|
return Triple("i386-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_X86_64:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_X86_64_ALL:
|
|
if (ArchFlag)
|
|
*ArchFlag = "x86_64";
|
|
return Triple("x86_64-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_X86_64_H:
|
|
if (ArchFlag)
|
|
*ArchFlag = "x86_64h";
|
|
return Triple("x86_64h-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_ARM:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_ARM_V4T:
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv4t";
|
|
return Triple("armv4t-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V5TEJ:
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv5e";
|
|
return Triple("armv5e-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_XSCALE:
|
|
if (ArchFlag)
|
|
*ArchFlag = "xscale";
|
|
return Triple("xscale-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V6:
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv6";
|
|
return Triple("armv6-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V6M:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cortex-m0";
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv6m";
|
|
return Triple("armv6m-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V7:
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv7";
|
|
return Triple("armv7-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V7EM:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cortex-m4";
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv7em";
|
|
return Triple("thumbv7em-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V7K:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cortex-a7";
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv7k";
|
|
return Triple("armv7k-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V7M:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cortex-m3";
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv7m";
|
|
return Triple("thumbv7m-apple-darwin");
|
|
case MachO::CPU_SUBTYPE_ARM_V7S:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cortex-a7";
|
|
if (ArchFlag)
|
|
*ArchFlag = "armv7s";
|
|
return Triple("armv7s-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_ARM64:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_ARM64_ALL:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cyclone";
|
|
if (ArchFlag)
|
|
*ArchFlag = "arm64";
|
|
return Triple("arm64-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_ARM64_32:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_ARM64_32_V8:
|
|
if (McpuDefault)
|
|
*McpuDefault = "cyclone";
|
|
if (ArchFlag)
|
|
*ArchFlag = "arm64_32";
|
|
return Triple("arm64_32-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_POWERPC:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_POWERPC_ALL:
|
|
if (ArchFlag)
|
|
*ArchFlag = "ppc";
|
|
return Triple("ppc-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
case MachO::CPU_TYPE_POWERPC64:
|
|
switch (CPUSubType & ~MachO::CPU_SUBTYPE_MASK) {
|
|
case MachO::CPU_SUBTYPE_POWERPC_ALL:
|
|
if (ArchFlag)
|
|
*ArchFlag = "ppc64";
|
|
return Triple("ppc64-apple-darwin");
|
|
default:
|
|
return Triple();
|
|
}
|
|
default:
|
|
return Triple();
|
|
}
|
|
}
|
|
|
|
Triple MachOObjectFile::getHostArch() {
|
|
return Triple(sys::getDefaultTargetTriple());
|
|
}
|
|
|
|
bool MachOObjectFile::isValidArch(StringRef ArchFlag) {
|
|
auto validArchs = getValidArchs();
|
|
return llvm::find(validArchs, ArchFlag) != validArchs.end();
|
|
}
|
|
|
|
ArrayRef<StringRef> MachOObjectFile::getValidArchs() {
|
|
static const std::array<StringRef, 17> validArchs = {{
|
|
"i386", "x86_64", "x86_64h", "armv4t", "arm", "armv5e",
|
|
"armv6", "armv6m", "armv7", "armv7em", "armv7k", "armv7m",
|
|
"armv7s", "arm64", "arm64_32", "ppc", "ppc64",
|
|
}};
|
|
|
|
return validArchs;
|
|
}
|
|
|
|
Triple::ArchType MachOObjectFile::getArch() const {
|
|
return getArch(getCPUType(*this), getCPUSubType(*this));
|
|
}
|
|
|
|
Triple MachOObjectFile::getArchTriple(const char **McpuDefault) const {
|
|
return getArchTriple(Header.cputype, Header.cpusubtype, McpuDefault);
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
ExportEntry::ExportEntry(Error *E, const MachOObjectFile *O,
|
|
ArrayRef<uint8_t> T) : E(E), O(O), Trie(T) {}
|
|
|
|
void ExportEntry::moveToFirst() {
|
|
ErrorAsOutParameter ErrAsOutParam(E);
|
|
pushNode(0);
|
|
if (*E)
|
|
return;
|
|
pushDownUntilBottom();
|
|
}
|
|
|
|
void ExportEntry::moveToEnd() {
|
|
Stack.clear();
|
|
Done = true;
|
|
}
|
|
|
|
bool ExportEntry::operator==(const ExportEntry &Other) const {
|
|
// Common case, one at end, other iterating from begin.
|
|
if (Done || Other.Done)
|
|
return (Done == Other.Done);
|
|
// Not equal if different stack sizes.
|
|
if (Stack.size() != Other.Stack.size())
|
|
return false;
|
|
// Not equal if different cumulative strings.
|
|
if (!CumulativeString.equals(Other.CumulativeString))
|
|
return false;
|
|
// Equal if all nodes in both stacks match.
|
|
for (unsigned i=0; i < Stack.size(); ++i) {
|
|
if (Stack[i].Start != Other.Stack[i].Start)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
uint64_t ExportEntry::readULEB128(const uint8_t *&Ptr, const char **error) {
|
|
unsigned Count;
|
|
uint64_t Result = decodeULEB128(Ptr, &Count, Trie.end(), error);
|
|
Ptr += Count;
|
|
if (Ptr > Trie.end())
|
|
Ptr = Trie.end();
|
|
return Result;
|
|
}
|
|
|
|
StringRef ExportEntry::name() const {
|
|
return CumulativeString;
|
|
}
|
|
|
|
uint64_t ExportEntry::flags() const {
|
|
return Stack.back().Flags;
|
|
}
|
|
|
|
uint64_t ExportEntry::address() const {
|
|
return Stack.back().Address;
|
|
}
|
|
|
|
uint64_t ExportEntry::other() const {
|
|
return Stack.back().Other;
|
|
}
|
|
|
|
StringRef ExportEntry::otherName() const {
|
|
const char* ImportName = Stack.back().ImportName;
|
|
if (ImportName)
|
|
return StringRef(ImportName);
|
|
return StringRef();
|
|
}
|
|
|
|
uint32_t ExportEntry::nodeOffset() const {
|
|
return Stack.back().Start - Trie.begin();
|
|
}
|
|
|
|
ExportEntry::NodeState::NodeState(const uint8_t *Ptr)
|
|
: Start(Ptr), Current(Ptr) {}
|
|
|
|
void ExportEntry::pushNode(uint64_t offset) {
|
|
ErrorAsOutParameter ErrAsOutParam(E);
|
|
const uint8_t *Ptr = Trie.begin() + offset;
|
|
NodeState State(Ptr);
|
|
const char *error;
|
|
uint64_t ExportInfoSize = readULEB128(State.Current, &error);
|
|
if (error) {
|
|
*E = malformedError("export info size " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
State.IsExportNode = (ExportInfoSize != 0);
|
|
const uint8_t* Children = State.Current + ExportInfoSize;
|
|
if (Children > Trie.end()) {
|
|
*E = malformedError(
|
|
"export info size: 0x" + Twine::utohexstr(ExportInfoSize) +
|
|
" in export trie data at node: 0x" + Twine::utohexstr(offset) +
|
|
" too big and extends past end of trie data");
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (State.IsExportNode) {
|
|
const uint8_t *ExportStart = State.Current;
|
|
State.Flags = readULEB128(State.Current, &error);
|
|
if (error) {
|
|
*E = malformedError("flags " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
uint64_t Kind = State.Flags & MachO::EXPORT_SYMBOL_FLAGS_KIND_MASK;
|
|
if (State.Flags != 0 &&
|
|
(Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_REGULAR &&
|
|
Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE &&
|
|
Kind != MachO::EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL)) {
|
|
*E = malformedError(
|
|
"unsupported exported symbol kind: " + Twine((int)Kind) +
|
|
" in flags: 0x" + Twine::utohexstr(State.Flags) +
|
|
" in export trie data at node: 0x" + Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_REEXPORT) {
|
|
State.Address = 0;
|
|
State.Other = readULEB128(State.Current, &error); // dylib ordinal
|
|
if (error) {
|
|
*E = malformedError("dylib ordinal of re-export " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (O != nullptr) {
|
|
if (State.Other > O->getLibraryCount()) {
|
|
*E = malformedError(
|
|
"bad library ordinal: " + Twine((int)State.Other) + " (max " +
|
|
Twine((int)O->getLibraryCount()) +
|
|
") in export trie data at node: 0x" + Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
State.ImportName = reinterpret_cast<const char*>(State.Current);
|
|
if (*State.ImportName == '\0') {
|
|
State.Current++;
|
|
} else {
|
|
const uint8_t *End = State.Current + 1;
|
|
if (End >= Trie.end()) {
|
|
*E = malformedError("import name of re-export in export trie data at "
|
|
"node: 0x" +
|
|
Twine::utohexstr(offset) +
|
|
" starts past end of trie data");
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
while(*End != '\0' && End < Trie.end())
|
|
End++;
|
|
if (*End != '\0') {
|
|
*E = malformedError("import name of re-export in export trie data at "
|
|
"node: 0x" +
|
|
Twine::utohexstr(offset) +
|
|
" extends past end of trie data");
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
State.Current = End + 1;
|
|
}
|
|
} else {
|
|
State.Address = readULEB128(State.Current, &error);
|
|
if (error) {
|
|
*E = malformedError("address " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (State.Flags & MachO::EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER) {
|
|
State.Other = readULEB128(State.Current, &error);
|
|
if (error) {
|
|
*E = malformedError("resolver of stub and resolver " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
if(ExportStart + ExportInfoSize != State.Current) {
|
|
*E = malformedError(
|
|
"inconsistant export info size: 0x" +
|
|
Twine::utohexstr(ExportInfoSize) + " where actual size was: 0x" +
|
|
Twine::utohexstr(State.Current - ExportStart) +
|
|
" in export trie data at node: 0x" + Twine::utohexstr(offset));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
State.ChildCount = *Children;
|
|
if (State.ChildCount != 0 && Children + 1 >= Trie.end()) {
|
|
*E = malformedError("byte for count of childern in export trie data at "
|
|
"node: 0x" +
|
|
Twine::utohexstr(offset) +
|
|
" extends past end of trie data");
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
State.Current = Children + 1;
|
|
State.NextChildIndex = 0;
|
|
State.ParentStringLength = CumulativeString.size();
|
|
Stack.push_back(State);
|
|
}
|
|
|
|
void ExportEntry::pushDownUntilBottom() {
|
|
ErrorAsOutParameter ErrAsOutParam(E);
|
|
const char *error;
|
|
while (Stack.back().NextChildIndex < Stack.back().ChildCount) {
|
|
NodeState &Top = Stack.back();
|
|
CumulativeString.resize(Top.ParentStringLength);
|
|
for (;*Top.Current != 0 && Top.Current < Trie.end(); Top.Current++) {
|
|
char C = *Top.Current;
|
|
CumulativeString.push_back(C);
|
|
}
|
|
if (Top.Current >= Trie.end()) {
|
|
*E = malformedError("edge sub-string in export trie data at node: 0x" +
|
|
Twine::utohexstr(Top.Start - Trie.begin()) +
|
|
" for child #" + Twine((int)Top.NextChildIndex) +
|
|
" extends past end of trie data");
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
Top.Current += 1;
|
|
uint64_t childNodeIndex = readULEB128(Top.Current, &error);
|
|
if (error) {
|
|
*E = malformedError("child node offset " + Twine(error) +
|
|
" in export trie data at node: 0x" +
|
|
Twine::utohexstr(Top.Start - Trie.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
for (const NodeState &node : nodes()) {
|
|
if (node.Start == Trie.begin() + childNodeIndex){
|
|
*E = malformedError("loop in childern in export trie data at node: 0x" +
|
|
Twine::utohexstr(Top.Start - Trie.begin()) +
|
|
" back to node: 0x" +
|
|
Twine::utohexstr(childNodeIndex));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
Top.NextChildIndex += 1;
|
|
pushNode(childNodeIndex);
|
|
if (*E)
|
|
return;
|
|
}
|
|
if (!Stack.back().IsExportNode) {
|
|
*E = malformedError("node is not an export node in export trie data at "
|
|
"node: 0x" +
|
|
Twine::utohexstr(Stack.back().Start - Trie.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// We have a trie data structure and need a way to walk it that is compatible
|
|
// with the C++ iterator model. The solution is a non-recursive depth first
|
|
// traversal where the iterator contains a stack of parent nodes along with a
|
|
// string that is the accumulation of all edge strings along the parent chain
|
|
// to this point.
|
|
//
|
|
// There is one "export" node for each exported symbol. But because some
|
|
// symbols may be a prefix of another symbol (e.g. _dup and _dup2), an export
|
|
// node may have child nodes too.
|
|
//
|
|
// The algorithm for moveNext() is to keep moving down the leftmost unvisited
|
|
// child until hitting a node with no children (which is an export node or
|
|
// else the trie is malformed). On the way down, each node is pushed on the
|
|
// stack ivar. If there is no more ways down, it pops up one and tries to go
|
|
// down a sibling path until a childless node is reached.
|
|
void ExportEntry::moveNext() {
|
|
assert(!Stack.empty() && "ExportEntry::moveNext() with empty node stack");
|
|
if (!Stack.back().IsExportNode) {
|
|
*E = malformedError("node is not an export node in export trie data at "
|
|
"node: 0x" +
|
|
Twine::utohexstr(Stack.back().Start - Trie.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
|
|
Stack.pop_back();
|
|
while (!Stack.empty()) {
|
|
NodeState &Top = Stack.back();
|
|
if (Top.NextChildIndex < Top.ChildCount) {
|
|
pushDownUntilBottom();
|
|
// Now at the next export node.
|
|
return;
|
|
} else {
|
|
if (Top.IsExportNode) {
|
|
// This node has no children but is itself an export node.
|
|
CumulativeString.resize(Top.ParentStringLength);
|
|
return;
|
|
}
|
|
Stack.pop_back();
|
|
}
|
|
}
|
|
Done = true;
|
|
}
|
|
|
|
iterator_range<export_iterator>
|
|
MachOObjectFile::exports(Error &E, ArrayRef<uint8_t> Trie,
|
|
const MachOObjectFile *O) {
|
|
ExportEntry Start(&E, O, Trie);
|
|
if (Trie.empty())
|
|
Start.moveToEnd();
|
|
else
|
|
Start.moveToFirst();
|
|
|
|
ExportEntry Finish(&E, O, Trie);
|
|
Finish.moveToEnd();
|
|
|
|
return make_range(export_iterator(Start), export_iterator(Finish));
|
|
}
|
|
|
|
iterator_range<export_iterator> MachOObjectFile::exports(Error &Err) const {
|
|
return exports(Err, getDyldInfoExportsTrie(), this);
|
|
}
|
|
|
|
MachORebaseEntry::MachORebaseEntry(Error *E, const MachOObjectFile *O,
|
|
ArrayRef<uint8_t> Bytes, bool is64Bit)
|
|
: E(E), O(O), Opcodes(Bytes), Ptr(Bytes.begin()),
|
|
PointerSize(is64Bit ? 8 : 4) {}
|
|
|
|
void MachORebaseEntry::moveToFirst() {
|
|
Ptr = Opcodes.begin();
|
|
moveNext();
|
|
}
|
|
|
|
void MachORebaseEntry::moveToEnd() {
|
|
Ptr = Opcodes.end();
|
|
RemainingLoopCount = 0;
|
|
Done = true;
|
|
}
|
|
|
|
void MachORebaseEntry::moveNext() {
|
|
ErrorAsOutParameter ErrAsOutParam(E);
|
|
// If in the middle of some loop, move to next rebasing in loop.
|
|
SegmentOffset += AdvanceAmount;
|
|
if (RemainingLoopCount) {
|
|
--RemainingLoopCount;
|
|
return;
|
|
}
|
|
// REBASE_OPCODE_DONE is only used for padding if we are not aligned to
|
|
// pointer size. Therefore it is possible to reach the end without ever having
|
|
// seen REBASE_OPCODE_DONE.
|
|
if (Ptr == Opcodes.end()) {
|
|
Done = true;
|
|
return;
|
|
}
|
|
bool More = true;
|
|
while (More) {
|
|
// Parse next opcode and set up next loop.
|
|
const uint8_t *OpcodeStart = Ptr;
|
|
uint8_t Byte = *Ptr++;
|
|
uint8_t ImmValue = Byte & MachO::REBASE_IMMEDIATE_MASK;
|
|
uint8_t Opcode = Byte & MachO::REBASE_OPCODE_MASK;
|
|
uint32_t Count, Skip;
|
|
const char *error = nullptr;
|
|
switch (Opcode) {
|
|
case MachO::REBASE_OPCODE_DONE:
|
|
More = false;
|
|
Done = true;
|
|
moveToEnd();
|
|
DEBUG_WITH_TYPE("mach-o-rebase", dbgs() << "REBASE_OPCODE_DONE\n");
|
|
break;
|
|
case MachO::REBASE_OPCODE_SET_TYPE_IMM:
|
|
RebaseType = ImmValue;
|
|
if (RebaseType > MachO::REBASE_TYPE_TEXT_PCREL32) {
|
|
*E = malformedError("for REBASE_OPCODE_SET_TYPE_IMM bad bind type: " +
|
|
Twine((int)RebaseType) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_SET_TYPE_IMM: "
|
|
<< "RebaseType=" << (int) RebaseType << "\n");
|
|
break;
|
|
case MachO::REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
|
|
SegmentIndex = ImmValue;
|
|
SegmentOffset = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
|
|
<< "SegmentIndex=" << SegmentIndex << ", "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< "\n");
|
|
break;
|
|
case MachO::REBASE_OPCODE_ADD_ADDR_ULEB:
|
|
SegmentOffset += readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_ADD_ADDR_ULEB " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_ADD_ADDR_ULEB " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE("mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_ADD_ADDR_ULEB: "
|
|
<< format("SegmentOffset=0x%06X",
|
|
SegmentOffset) << "\n");
|
|
break;
|
|
case MachO::REBASE_OPCODE_ADD_ADDR_IMM_SCALED:
|
|
SegmentOffset += ImmValue * PointerSize;
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_ADD_ADDR_IMM_SCALED " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE("mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_ADD_ADDR_IMM_SCALED: "
|
|
<< format("SegmentOffset=0x%06X",
|
|
SegmentOffset) << "\n");
|
|
break;
|
|
case MachO::REBASE_OPCODE_DO_REBASE_IMM_TIMES:
|
|
AdvanceAmount = PointerSize;
|
|
Skip = 0;
|
|
Count = ImmValue;
|
|
if (ImmValue != 0)
|
|
RemainingLoopCount = ImmValue - 1;
|
|
else
|
|
RemainingLoopCount = 0;
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize, Count, Skip);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_IMM_TIMES " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_DO_REBASE_IMM_TIMES: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES:
|
|
AdvanceAmount = PointerSize;
|
|
Skip = 0;
|
|
Count = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (Count != 0)
|
|
RemainingLoopCount = Count - 1;
|
|
else
|
|
RemainingLoopCount = 0;
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize, Count, Skip);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
case MachO::REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB:
|
|
Skip = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
AdvanceAmount = Skip + PointerSize;
|
|
Count = 1;
|
|
RemainingLoopCount = 0;
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize, Count, Skip);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
case MachO::REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB:
|
|
Count = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_"
|
|
"ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (Count != 0)
|
|
RemainingLoopCount = Count - 1;
|
|
else
|
|
RemainingLoopCount = 0;
|
|
Skip = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_"
|
|
"ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
AdvanceAmount = Skip + PointerSize;
|
|
|
|
error = O->RebaseEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize, Count, Skip);
|
|
if (error) {
|
|
*E = malformedError("for REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_"
|
|
"ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-rebase",
|
|
dbgs() << "REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
default:
|
|
*E = malformedError("bad rebase info (bad opcode value 0x" +
|
|
Twine::utohexstr(Opcode) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint64_t MachORebaseEntry::readULEB128(const char **error) {
|
|
unsigned Count;
|
|
uint64_t Result = decodeULEB128(Ptr, &Count, Opcodes.end(), error);
|
|
Ptr += Count;
|
|
if (Ptr > Opcodes.end())
|
|
Ptr = Opcodes.end();
|
|
return Result;
|
|
}
|
|
|
|
int32_t MachORebaseEntry::segmentIndex() const { return SegmentIndex; }
|
|
|
|
uint64_t MachORebaseEntry::segmentOffset() const { return SegmentOffset; }
|
|
|
|
StringRef MachORebaseEntry::typeName() const {
|
|
switch (RebaseType) {
|
|
case MachO::REBASE_TYPE_POINTER:
|
|
return "pointer";
|
|
case MachO::REBASE_TYPE_TEXT_ABSOLUTE32:
|
|
return "text abs32";
|
|
case MachO::REBASE_TYPE_TEXT_PCREL32:
|
|
return "text rel32";
|
|
}
|
|
return "unknown";
|
|
}
|
|
|
|
// For use with the SegIndex of a checked Mach-O Rebase entry
|
|
// to get the segment name.
|
|
StringRef MachORebaseEntry::segmentName() const {
|
|
return O->BindRebaseSegmentName(SegmentIndex);
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Rebase entry
|
|
// to get the section name.
|
|
StringRef MachORebaseEntry::sectionName() const {
|
|
return O->BindRebaseSectionName(SegmentIndex, SegmentOffset);
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Rebase entry
|
|
// to get the address.
|
|
uint64_t MachORebaseEntry::address() const {
|
|
return O->BindRebaseAddress(SegmentIndex, SegmentOffset);
|
|
}
|
|
|
|
bool MachORebaseEntry::operator==(const MachORebaseEntry &Other) const {
|
|
#ifdef EXPENSIVE_CHECKS
|
|
assert(Opcodes == Other.Opcodes && "compare iterators of different files");
|
|
#else
|
|
assert(Opcodes.data() == Other.Opcodes.data() && "compare iterators of different files");
|
|
#endif
|
|
return (Ptr == Other.Ptr) &&
|
|
(RemainingLoopCount == Other.RemainingLoopCount) &&
|
|
(Done == Other.Done);
|
|
}
|
|
|
|
iterator_range<rebase_iterator>
|
|
MachOObjectFile::rebaseTable(Error &Err, MachOObjectFile *O,
|
|
ArrayRef<uint8_t> Opcodes, bool is64) {
|
|
if (O->BindRebaseSectionTable == nullptr)
|
|
O->BindRebaseSectionTable = std::make_unique<BindRebaseSegInfo>(O);
|
|
MachORebaseEntry Start(&Err, O, Opcodes, is64);
|
|
Start.moveToFirst();
|
|
|
|
MachORebaseEntry Finish(&Err, O, Opcodes, is64);
|
|
Finish.moveToEnd();
|
|
|
|
return make_range(rebase_iterator(Start), rebase_iterator(Finish));
|
|
}
|
|
|
|
iterator_range<rebase_iterator> MachOObjectFile::rebaseTable(Error &Err) {
|
|
return rebaseTable(Err, this, getDyldInfoRebaseOpcodes(), is64Bit());
|
|
}
|
|
|
|
MachOBindEntry::MachOBindEntry(Error *E, const MachOObjectFile *O,
|
|
ArrayRef<uint8_t> Bytes, bool is64Bit, Kind BK)
|
|
: E(E), O(O), Opcodes(Bytes), Ptr(Bytes.begin()),
|
|
PointerSize(is64Bit ? 8 : 4), TableKind(BK) {}
|
|
|
|
void MachOBindEntry::moveToFirst() {
|
|
Ptr = Opcodes.begin();
|
|
moveNext();
|
|
}
|
|
|
|
void MachOBindEntry::moveToEnd() {
|
|
Ptr = Opcodes.end();
|
|
RemainingLoopCount = 0;
|
|
Done = true;
|
|
}
|
|
|
|
void MachOBindEntry::moveNext() {
|
|
ErrorAsOutParameter ErrAsOutParam(E);
|
|
// If in the middle of some loop, move to next binding in loop.
|
|
SegmentOffset += AdvanceAmount;
|
|
if (RemainingLoopCount) {
|
|
--RemainingLoopCount;
|
|
return;
|
|
}
|
|
// BIND_OPCODE_DONE is only used for padding if we are not aligned to
|
|
// pointer size. Therefore it is possible to reach the end without ever having
|
|
// seen BIND_OPCODE_DONE.
|
|
if (Ptr == Opcodes.end()) {
|
|
Done = true;
|
|
return;
|
|
}
|
|
bool More = true;
|
|
while (More) {
|
|
// Parse next opcode and set up next loop.
|
|
const uint8_t *OpcodeStart = Ptr;
|
|
uint8_t Byte = *Ptr++;
|
|
uint8_t ImmValue = Byte & MachO::BIND_IMMEDIATE_MASK;
|
|
uint8_t Opcode = Byte & MachO::BIND_OPCODE_MASK;
|
|
int8_t SignExtended;
|
|
const uint8_t *SymStart;
|
|
uint32_t Count, Skip;
|
|
const char *error = nullptr;
|
|
switch (Opcode) {
|
|
case MachO::BIND_OPCODE_DONE:
|
|
if (TableKind == Kind::Lazy) {
|
|
// Lazying bindings have a DONE opcode between entries. Need to ignore
|
|
// it to advance to next entry. But need not if this is last entry.
|
|
bool NotLastEntry = false;
|
|
for (const uint8_t *P = Ptr; P < Opcodes.end(); ++P) {
|
|
if (*P) {
|
|
NotLastEntry = true;
|
|
}
|
|
}
|
|
if (NotLastEntry)
|
|
break;
|
|
}
|
|
More = false;
|
|
moveToEnd();
|
|
DEBUG_WITH_TYPE("mach-o-bind", dbgs() << "BIND_OPCODE_DONE\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_IMM:
|
|
if (TableKind == Kind::Weak) {
|
|
*E = malformedError("BIND_OPCODE_SET_DYLIB_ORDINAL_IMM not allowed in "
|
|
"weak bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
Ordinal = ImmValue;
|
|
LibraryOrdinalSet = true;
|
|
if (ImmValue > O->getLibraryCount()) {
|
|
*E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB bad "
|
|
"library ordinal: " +
|
|
Twine((int)ImmValue) + " (max " +
|
|
Twine((int)O->getLibraryCount()) +
|
|
") for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: "
|
|
<< "Ordinal=" << Ordinal << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB:
|
|
if (TableKind == Kind::Weak) {
|
|
*E = malformedError("BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB not allowed in "
|
|
"weak bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
Ordinal = readULEB128(&error);
|
|
LibraryOrdinalSet = true;
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (Ordinal > (int)O->getLibraryCount()) {
|
|
*E = malformedError("for BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB bad "
|
|
"library ordinal: " +
|
|
Twine((int)Ordinal) + " (max " +
|
|
Twine((int)O->getLibraryCount()) +
|
|
") for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: "
|
|
<< "Ordinal=" << Ordinal << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_DYLIB_SPECIAL_IMM:
|
|
if (TableKind == Kind::Weak) {
|
|
*E = malformedError("BIND_OPCODE_SET_DYLIB_SPECIAL_IMM not allowed in "
|
|
"weak bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (ImmValue) {
|
|
SignExtended = MachO::BIND_OPCODE_MASK | ImmValue;
|
|
Ordinal = SignExtended;
|
|
if (Ordinal < MachO::BIND_SPECIAL_DYLIB_FLAT_LOOKUP) {
|
|
*E = malformedError("for BIND_OPCODE_SET_DYLIB_SPECIAL_IMM unknown "
|
|
"special ordinal: " +
|
|
Twine((int)Ordinal) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
} else
|
|
Ordinal = 0;
|
|
LibraryOrdinalSet = true;
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: "
|
|
<< "Ordinal=" << Ordinal << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM:
|
|
Flags = ImmValue;
|
|
SymStart = Ptr;
|
|
while (*Ptr && (Ptr < Opcodes.end())) {
|
|
++Ptr;
|
|
}
|
|
if (Ptr == Opcodes.end()) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM "
|
|
"symbol name extends past opcodes for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
SymbolName = StringRef(reinterpret_cast<const char*>(SymStart),
|
|
Ptr-SymStart);
|
|
++Ptr;
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: "
|
|
<< "SymbolName=" << SymbolName << "\n");
|
|
if (TableKind == Kind::Weak) {
|
|
if (ImmValue & MachO::BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION)
|
|
return;
|
|
}
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_TYPE_IMM:
|
|
BindType = ImmValue;
|
|
if (ImmValue > MachO::BIND_TYPE_TEXT_PCREL32) {
|
|
*E = malformedError("for BIND_OPCODE_SET_TYPE_IMM bad bind type: " +
|
|
Twine((int)ImmValue) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_TYPE_IMM: "
|
|
<< "BindType=" << (int)BindType << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_ADDEND_SLEB:
|
|
Addend = readSLEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_SET_ADDEND_SLEB " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_ADDEND_SLEB: "
|
|
<< "Addend=" << Addend << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB:
|
|
SegmentIndex = ImmValue;
|
|
SegmentOffset = readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: "
|
|
<< "SegmentIndex=" << SegmentIndex << ", "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_ADD_ADDR_ULEB:
|
|
SegmentOffset += readULEB128(&error);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE("mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_ADD_ADDR_ULEB: "
|
|
<< format("SegmentOffset=0x%06X",
|
|
SegmentOffset) << "\n");
|
|
break;
|
|
case MachO::BIND_OPCODE_DO_BIND:
|
|
AdvanceAmount = PointerSize;
|
|
RemainingLoopCount = 0;
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND " + Twine(error) +
|
|
" for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (SymbolName == StringRef()) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND missing preceding "
|
|
"BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (!LibraryOrdinalSet && TableKind != Kind::Weak) {
|
|
*E =
|
|
malformedError("for BIND_OPCODE_DO_BIND missing preceding "
|
|
"BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE("mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_DO_BIND: "
|
|
<< format("SegmentOffset=0x%06X",
|
|
SegmentOffset) << "\n");
|
|
return;
|
|
case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB:
|
|
if (TableKind == Kind::Lazy) {
|
|
*E = malformedError("BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB not allowed in "
|
|
"lazy bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (SymbolName == StringRef()) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB missing "
|
|
"preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for opcode "
|
|
"at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (!LibraryOrdinalSet && TableKind != Kind::Weak) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB missing "
|
|
"preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
AdvanceAmount = readULEB128(&error) + PointerSize;
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
// Note, this is not really an error until the next bind but make no sense
|
|
// for a BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB to not be followed by another
|
|
// bind operation.
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset +
|
|
AdvanceAmount, PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_ADD_ADDR_ULEB (after adding "
|
|
"ULEB) " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
RemainingLoopCount = 0;
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
case MachO::BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED:
|
|
if (TableKind == Kind::Lazy) {
|
|
*E = malformedError("BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED not "
|
|
"allowed in lazy bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (SymbolName == StringRef()) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED "
|
|
"missing preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for "
|
|
"opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (!LibraryOrdinalSet && TableKind != Kind::Weak) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED "
|
|
"missing preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode "
|
|
"at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
AdvanceAmount = ImmValue * PointerSize + PointerSize;
|
|
RemainingLoopCount = 0;
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset +
|
|
AdvanceAmount, PointerSize);
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE("mach-o-bind",
|
|
dbgs()
|
|
<< "BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset) << "\n");
|
|
return;
|
|
case MachO::BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB:
|
|
if (TableKind == Kind::Lazy) {
|
|
*E = malformedError("BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB not "
|
|
"allowed in lazy bind table for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
Count = readULEB128(&error);
|
|
if (Count != 0)
|
|
RemainingLoopCount = Count - 1;
|
|
else
|
|
RemainingLoopCount = 0;
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB "
|
|
" (count value) " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
Skip = readULEB128(&error);
|
|
AdvanceAmount = Skip + PointerSize;
|
|
if (error) {
|
|
*E = malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB "
|
|
" (skip value) " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (SymbolName == StringRef()) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB "
|
|
"missing preceding BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM for "
|
|
"opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
if (!LibraryOrdinalSet && TableKind != Kind::Weak) {
|
|
*E = malformedError(
|
|
"for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB "
|
|
"missing preceding BIND_OPCODE_SET_DYLIB_ORDINAL_* for opcode "
|
|
"at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
error = O->BindEntryCheckSegAndOffsets(SegmentIndex, SegmentOffset,
|
|
PointerSize, Count, Skip);
|
|
if (error) {
|
|
*E =
|
|
malformedError("for BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB " +
|
|
Twine(error) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
DEBUG_WITH_TYPE(
|
|
"mach-o-bind",
|
|
dbgs() << "BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: "
|
|
<< format("SegmentOffset=0x%06X", SegmentOffset)
|
|
<< ", AdvanceAmount=" << AdvanceAmount
|
|
<< ", RemainingLoopCount=" << RemainingLoopCount
|
|
<< "\n");
|
|
return;
|
|
default:
|
|
*E = malformedError("bad bind info (bad opcode value 0x" +
|
|
Twine::utohexstr(Opcode) + " for opcode at: 0x" +
|
|
Twine::utohexstr(OpcodeStart - Opcodes.begin()));
|
|
moveToEnd();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
uint64_t MachOBindEntry::readULEB128(const char **error) {
|
|
unsigned Count;
|
|
uint64_t Result = decodeULEB128(Ptr, &Count, Opcodes.end(), error);
|
|
Ptr += Count;
|
|
if (Ptr > Opcodes.end())
|
|
Ptr = Opcodes.end();
|
|
return Result;
|
|
}
|
|
|
|
int64_t MachOBindEntry::readSLEB128(const char **error) {
|
|
unsigned Count;
|
|
int64_t Result = decodeSLEB128(Ptr, &Count, Opcodes.end(), error);
|
|
Ptr += Count;
|
|
if (Ptr > Opcodes.end())
|
|
Ptr = Opcodes.end();
|
|
return Result;
|
|
}
|
|
|
|
int32_t MachOBindEntry::segmentIndex() const { return SegmentIndex; }
|
|
|
|
uint64_t MachOBindEntry::segmentOffset() const { return SegmentOffset; }
|
|
|
|
StringRef MachOBindEntry::typeName() const {
|
|
switch (BindType) {
|
|
case MachO::BIND_TYPE_POINTER:
|
|
return "pointer";
|
|
case MachO::BIND_TYPE_TEXT_ABSOLUTE32:
|
|
return "text abs32";
|
|
case MachO::BIND_TYPE_TEXT_PCREL32:
|
|
return "text rel32";
|
|
}
|
|
return "unknown";
|
|
}
|
|
|
|
StringRef MachOBindEntry::symbolName() const { return SymbolName; }
|
|
|
|
int64_t MachOBindEntry::addend() const { return Addend; }
|
|
|
|
uint32_t MachOBindEntry::flags() const { return Flags; }
|
|
|
|
int MachOBindEntry::ordinal() const { return Ordinal; }
|
|
|
|
// For use with the SegIndex of a checked Mach-O Bind entry
|
|
// to get the segment name.
|
|
StringRef MachOBindEntry::segmentName() const {
|
|
return O->BindRebaseSegmentName(SegmentIndex);
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind entry
|
|
// to get the section name.
|
|
StringRef MachOBindEntry::sectionName() const {
|
|
return O->BindRebaseSectionName(SegmentIndex, SegmentOffset);
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind entry
|
|
// to get the address.
|
|
uint64_t MachOBindEntry::address() const {
|
|
return O->BindRebaseAddress(SegmentIndex, SegmentOffset);
|
|
}
|
|
|
|
bool MachOBindEntry::operator==(const MachOBindEntry &Other) const {
|
|
#ifdef EXPENSIVE_CHECKS
|
|
assert(Opcodes == Other.Opcodes && "compare iterators of different files");
|
|
#else
|
|
assert(Opcodes.data() == Other.Opcodes.data() && "compare iterators of different files");
|
|
#endif
|
|
return (Ptr == Other.Ptr) &&
|
|
(RemainingLoopCount == Other.RemainingLoopCount) &&
|
|
(Done == Other.Done);
|
|
}
|
|
|
|
// Build table of sections so SegIndex/SegOffset pairs can be translated.
|
|
BindRebaseSegInfo::BindRebaseSegInfo(const object::MachOObjectFile *Obj) {
|
|
uint32_t CurSegIndex = Obj->hasPageZeroSegment() ? 1 : 0;
|
|
StringRef CurSegName;
|
|
uint64_t CurSegAddress;
|
|
for (const SectionRef &Section : Obj->sections()) {
|
|
SectionInfo Info;
|
|
Expected<StringRef> NameOrErr = Section.getName();
|
|
if (!NameOrErr)
|
|
consumeError(NameOrErr.takeError());
|
|
else
|
|
Info.SectionName = *NameOrErr;
|
|
Info.Address = Section.getAddress();
|
|
Info.Size = Section.getSize();
|
|
Info.SegmentName =
|
|
Obj->getSectionFinalSegmentName(Section.getRawDataRefImpl());
|
|
if (!Info.SegmentName.equals(CurSegName)) {
|
|
++CurSegIndex;
|
|
CurSegName = Info.SegmentName;
|
|
CurSegAddress = Info.Address;
|
|
}
|
|
Info.SegmentIndex = CurSegIndex - 1;
|
|
Info.OffsetInSegment = Info.Address - CurSegAddress;
|
|
Info.SegmentStartAddress = CurSegAddress;
|
|
Sections.push_back(Info);
|
|
}
|
|
MaxSegIndex = CurSegIndex;
|
|
}
|
|
|
|
// For use with a SegIndex, SegOffset, and PointerSize triple in
|
|
// MachOBindEntry::moveNext() to validate a MachOBindEntry or MachORebaseEntry.
|
|
//
|
|
// Given a SegIndex, SegOffset, and PointerSize, verify a valid section exists
|
|
// that fully contains a pointer at that location. Multiple fixups in a bind
|
|
// (such as with the BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB opcode) can
|
|
// be tested via the Count and Skip parameters.
|
|
const char * BindRebaseSegInfo::checkSegAndOffsets(int32_t SegIndex,
|
|
uint64_t SegOffset,
|
|
uint8_t PointerSize,
|
|
uint32_t Count,
|
|
uint32_t Skip) {
|
|
if (SegIndex == -1)
|
|
return "missing preceding *_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB";
|
|
if (SegIndex >= MaxSegIndex)
|
|
return "bad segIndex (too large)";
|
|
for (uint32_t i = 0; i < Count; ++i) {
|
|
uint32_t Start = SegOffset + i * (PointerSize + Skip);
|
|
uint32_t End = Start + PointerSize;
|
|
bool Found = false;
|
|
for (const SectionInfo &SI : Sections) {
|
|
if (SI.SegmentIndex != SegIndex)
|
|
continue;
|
|
if ((SI.OffsetInSegment<=Start) && (Start<(SI.OffsetInSegment+SI.Size))) {
|
|
if (End <= SI.OffsetInSegment + SI.Size) {
|
|
Found = true;
|
|
break;
|
|
}
|
|
else
|
|
return "bad offset, extends beyond section boundary";
|
|
}
|
|
}
|
|
if (!Found)
|
|
return "bad offset, not in section";
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// For use with the SegIndex of a checked Mach-O Bind or Rebase entry
|
|
// to get the segment name.
|
|
StringRef BindRebaseSegInfo::segmentName(int32_t SegIndex) {
|
|
for (const SectionInfo &SI : Sections) {
|
|
if (SI.SegmentIndex == SegIndex)
|
|
return SI.SegmentName;
|
|
}
|
|
llvm_unreachable("invalid SegIndex");
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase
|
|
// to get the SectionInfo.
|
|
const BindRebaseSegInfo::SectionInfo &BindRebaseSegInfo::findSection(
|
|
int32_t SegIndex, uint64_t SegOffset) {
|
|
for (const SectionInfo &SI : Sections) {
|
|
if (SI.SegmentIndex != SegIndex)
|
|
continue;
|
|
if (SI.OffsetInSegment > SegOffset)
|
|
continue;
|
|
if (SegOffset >= (SI.OffsetInSegment + SI.Size))
|
|
continue;
|
|
return SI;
|
|
}
|
|
llvm_unreachable("SegIndex and SegOffset not in any section");
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase
|
|
// entry to get the section name.
|
|
StringRef BindRebaseSegInfo::sectionName(int32_t SegIndex,
|
|
uint64_t SegOffset) {
|
|
return findSection(SegIndex, SegOffset).SectionName;
|
|
}
|
|
|
|
// For use with a SegIndex,SegOffset pair from a checked Mach-O Bind or Rebase
|
|
// entry to get the address.
|
|
uint64_t BindRebaseSegInfo::address(uint32_t SegIndex, uint64_t OffsetInSeg) {
|
|
const SectionInfo &SI = findSection(SegIndex, OffsetInSeg);
|
|
return SI.SegmentStartAddress + OffsetInSeg;
|
|
}
|
|
|
|
iterator_range<bind_iterator>
|
|
MachOObjectFile::bindTable(Error &Err, MachOObjectFile *O,
|
|
ArrayRef<uint8_t> Opcodes, bool is64,
|
|
MachOBindEntry::Kind BKind) {
|
|
if (O->BindRebaseSectionTable == nullptr)
|
|
O->BindRebaseSectionTable = std::make_unique<BindRebaseSegInfo>(O);
|
|
MachOBindEntry Start(&Err, O, Opcodes, is64, BKind);
|
|
Start.moveToFirst();
|
|
|
|
MachOBindEntry Finish(&Err, O, Opcodes, is64, BKind);
|
|
Finish.moveToEnd();
|
|
|
|
return make_range(bind_iterator(Start), bind_iterator(Finish));
|
|
}
|
|
|
|
iterator_range<bind_iterator> MachOObjectFile::bindTable(Error &Err) {
|
|
return bindTable(Err, this, getDyldInfoBindOpcodes(), is64Bit(),
|
|
MachOBindEntry::Kind::Regular);
|
|
}
|
|
|
|
iterator_range<bind_iterator> MachOObjectFile::lazyBindTable(Error &Err) {
|
|
return bindTable(Err, this, getDyldInfoLazyBindOpcodes(), is64Bit(),
|
|
MachOBindEntry::Kind::Lazy);
|
|
}
|
|
|
|
iterator_range<bind_iterator> MachOObjectFile::weakBindTable(Error &Err) {
|
|
return bindTable(Err, this, getDyldInfoWeakBindOpcodes(), is64Bit(),
|
|
MachOBindEntry::Kind::Weak);
|
|
}
|
|
|
|
MachOObjectFile::load_command_iterator
|
|
MachOObjectFile::begin_load_commands() const {
|
|
return LoadCommands.begin();
|
|
}
|
|
|
|
MachOObjectFile::load_command_iterator
|
|
MachOObjectFile::end_load_commands() const {
|
|
return LoadCommands.end();
|
|
}
|
|
|
|
iterator_range<MachOObjectFile::load_command_iterator>
|
|
MachOObjectFile::load_commands() const {
|
|
return make_range(begin_load_commands(), end_load_commands());
|
|
}
|
|
|
|
StringRef
|
|
MachOObjectFile::getSectionFinalSegmentName(DataRefImpl Sec) const {
|
|
ArrayRef<char> Raw = getSectionRawFinalSegmentName(Sec);
|
|
return parseSegmentOrSectionName(Raw.data());
|
|
}
|
|
|
|
ArrayRef<char>
|
|
MachOObjectFile::getSectionRawName(DataRefImpl Sec) const {
|
|
assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
|
|
const section_base *Base =
|
|
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
|
|
return makeArrayRef(Base->sectname);
|
|
}
|
|
|
|
ArrayRef<char>
|
|
MachOObjectFile::getSectionRawFinalSegmentName(DataRefImpl Sec) const {
|
|
assert(Sec.d.a < Sections.size() && "Should have detected this earlier");
|
|
const section_base *Base =
|
|
reinterpret_cast<const section_base *>(Sections[Sec.d.a]);
|
|
return makeArrayRef(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;
|
|
}
|
|
|
|
uint32_t MachOObjectFile::getScatteredRelocationType(
|
|
const MachO::any_relocation_info &RE) const {
|
|
return (RE.r_word0 >> 24) & 0xf;
|
|
}
|
|
|
|
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(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::getAnyRelocationSection(
|
|
const MachO::any_relocation_info &RE) const {
|
|
if (isRelocationScattered(RE) || getPlainRelocationExternal(RE))
|
|
return *section_end();
|
|
unsigned SecNum = getPlainRelocationSymbolNum(RE);
|
|
if (SecNum == MachO::R_ABS || SecNum > Sections.size())
|
|
return *section_end();
|
|
DataRefImpl DRI;
|
|
DRI.d.a = SecNum - 1;
|
|
return SectionRef(DRI, this);
|
|
}
|
|
|
|
MachO::section MachOObjectFile::getSection(DataRefImpl DRI) const {
|
|
assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
|
|
return getStruct<MachO::section>(*this, Sections[DRI.d.a]);
|
|
}
|
|
|
|
MachO::section_64 MachOObjectFile::getSection64(DataRefImpl DRI) const {
|
|
assert(DRI.d.a < Sections.size() && "Should have detected this earlier");
|
|
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_option_command
|
|
MachOObjectFile::getLinkerOptionLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::linker_option_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::version_min_command
|
|
MachOObjectFile::getVersionMinLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::version_min_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::note_command
|
|
MachOObjectFile::getNoteLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::note_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::build_version_command
|
|
MachOObjectFile::getBuildVersionLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::build_version_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::build_tool_version
|
|
MachOObjectFile::getBuildToolVersion(unsigned index) const {
|
|
return getStruct<MachO::build_tool_version>(*this, BuildTools[index]);
|
|
}
|
|
|
|
MachO::dylib_command
|
|
MachOObjectFile::getDylibIDLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::dylib_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::dyld_info_command
|
|
MachOObjectFile::getDyldInfoLoadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::dyld_info_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::dylinker_command
|
|
MachOObjectFile::getDylinkerCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::dylinker_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::uuid_command
|
|
MachOObjectFile::getUuidCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::uuid_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::rpath_command
|
|
MachOObjectFile::getRpathCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::rpath_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::source_version_command
|
|
MachOObjectFile::getSourceVersionCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::source_version_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::entry_point_command
|
|
MachOObjectFile::getEntryPointCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::entry_point_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::encryption_info_command
|
|
MachOObjectFile::getEncryptionInfoCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::encryption_info_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::encryption_info_command_64
|
|
MachOObjectFile::getEncryptionInfoCommand64(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::encryption_info_command_64>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::sub_framework_command
|
|
MachOObjectFile::getSubFrameworkCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::sub_framework_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::sub_umbrella_command
|
|
MachOObjectFile::getSubUmbrellaCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::sub_umbrella_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::sub_library_command
|
|
MachOObjectFile::getSubLibraryCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::sub_library_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::sub_client_command
|
|
MachOObjectFile::getSubClientCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::sub_client_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::routines_command
|
|
MachOObjectFile::getRoutinesCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::routines_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::routines_command_64
|
|
MachOObjectFile::getRoutinesCommand64(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::routines_command_64>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::thread_command
|
|
MachOObjectFile::getThreadCommand(const LoadCommandInfo &L) const {
|
|
return getStruct<MachO::thread_command>(*this, L.Ptr);
|
|
}
|
|
|
|
MachO::any_relocation_info
|
|
MachOObjectFile::getRelocation(DataRefImpl Rel) const {
|
|
uint32_t Offset;
|
|
if (getHeader().filetype == MachO::MH_OBJECT) {
|
|
DataRefImpl Sec;
|
|
Sec.d.a = Rel.d.a;
|
|
if (is64Bit()) {
|
|
MachO::section_64 Sect = getSection64(Sec);
|
|
Offset = Sect.reloff;
|
|
} else {
|
|
MachO::section Sect = getSection(Sec);
|
|
Offset = Sect.reloff;
|
|
}
|
|
} else {
|
|
MachO::dysymtab_command DysymtabLoadCmd = getDysymtabLoadCommand();
|
|
if (Rel.d.a == 0)
|
|
Offset = DysymtabLoadCmd.extreloff; // Offset to the external relocations
|
|
else
|
|
Offset = DysymtabLoadCmd.locreloff; // Offset to the local relocations
|
|
}
|
|
|
|
auto P = reinterpret_cast<const MachO::any_relocation_info *>(
|
|
getPtr(*this, Offset)) + Rel.d.b;
|
|
return getStruct<MachO::any_relocation_info>(
|
|
*this, reinterpret_cast<const char *>(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);
|
|
}
|
|
|
|
const MachO::mach_header &MachOObjectFile::getHeader() const {
|
|
return Header;
|
|
}
|
|
|
|
const MachO::mach_header_64 &MachOObjectFile::getHeader64() const {
|
|
assert(is64Bit());
|
|
return Header64;
|
|
}
|
|
|
|
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 {
|
|
if (SymtabLoadCmd)
|
|
return getStruct<MachO::symtab_command>(*this, SymtabLoadCmd);
|
|
|
|
// If there is no SymtabLoadCmd return a load command with zero'ed fields.
|
|
MachO::symtab_command Cmd;
|
|
Cmd.cmd = MachO::LC_SYMTAB;
|
|
Cmd.cmdsize = sizeof(MachO::symtab_command);
|
|
Cmd.symoff = 0;
|
|
Cmd.nsyms = 0;
|
|
Cmd.stroff = 0;
|
|
Cmd.strsize = 0;
|
|
return Cmd;
|
|
}
|
|
|
|
MachO::dysymtab_command MachOObjectFile::getDysymtabLoadCommand() const {
|
|
if (DysymtabLoadCmd)
|
|
return getStruct<MachO::dysymtab_command>(*this, DysymtabLoadCmd);
|
|
|
|
// If there is no DysymtabLoadCmd return a load command with zero'ed fields.
|
|
MachO::dysymtab_command Cmd;
|
|
Cmd.cmd = MachO::LC_DYSYMTAB;
|
|
Cmd.cmdsize = sizeof(MachO::dysymtab_command);
|
|
Cmd.ilocalsym = 0;
|
|
Cmd.nlocalsym = 0;
|
|
Cmd.iextdefsym = 0;
|
|
Cmd.nextdefsym = 0;
|
|
Cmd.iundefsym = 0;
|
|
Cmd.nundefsym = 0;
|
|
Cmd.tocoff = 0;
|
|
Cmd.ntoc = 0;
|
|
Cmd.modtaboff = 0;
|
|
Cmd.nmodtab = 0;
|
|
Cmd.extrefsymoff = 0;
|
|
Cmd.nextrefsyms = 0;
|
|
Cmd.indirectsymoff = 0;
|
|
Cmd.nindirectsyms = 0;
|
|
Cmd.extreloff = 0;
|
|
Cmd.nextrel = 0;
|
|
Cmd.locreloff = 0;
|
|
Cmd.nlocrel = 0;
|
|
return Cmd;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
MachO::linkedit_data_command
|
|
MachOObjectFile::getLinkOptHintsLoadCommand() const {
|
|
if (LinkOptHintsLoadCmd)
|
|
return getStruct<MachO::linkedit_data_command>(*this, LinkOptHintsLoadCmd);
|
|
|
|
// If there is no LinkOptHintsLoadCmd return a load command with zero'ed
|
|
// fields.
|
|
MachO::linkedit_data_command Cmd;
|
|
Cmd.cmd = MachO::LC_LINKER_OPTIMIZATION_HINT;
|
|
Cmd.cmdsize = sizeof(MachO::linkedit_data_command);
|
|
Cmd.dataoff = 0;
|
|
Cmd.datasize = 0;
|
|
return Cmd;
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getDyldInfoRebaseOpcodes() const {
|
|
if (!DyldInfoLoadCmd)
|
|
return None;
|
|
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
|
|
if (!DyldInfoOrErr)
|
|
return None;
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
const uint8_t *Ptr =
|
|
reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.rebase_off));
|
|
return makeArrayRef(Ptr, DyldInfo.rebase_size);
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getDyldInfoBindOpcodes() const {
|
|
if (!DyldInfoLoadCmd)
|
|
return None;
|
|
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
|
|
if (!DyldInfoOrErr)
|
|
return None;
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
const uint8_t *Ptr =
|
|
reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.bind_off));
|
|
return makeArrayRef(Ptr, DyldInfo.bind_size);
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getDyldInfoWeakBindOpcodes() const {
|
|
if (!DyldInfoLoadCmd)
|
|
return None;
|
|
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
|
|
if (!DyldInfoOrErr)
|
|
return None;
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
const uint8_t *Ptr =
|
|
reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.weak_bind_off));
|
|
return makeArrayRef(Ptr, DyldInfo.weak_bind_size);
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getDyldInfoLazyBindOpcodes() const {
|
|
if (!DyldInfoLoadCmd)
|
|
return None;
|
|
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
|
|
if (!DyldInfoOrErr)
|
|
return None;
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
const uint8_t *Ptr =
|
|
reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.lazy_bind_off));
|
|
return makeArrayRef(Ptr, DyldInfo.lazy_bind_size);
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getDyldInfoExportsTrie() const {
|
|
if (!DyldInfoLoadCmd)
|
|
return None;
|
|
|
|
auto DyldInfoOrErr =
|
|
getStructOrErr<MachO::dyld_info_command>(*this, DyldInfoLoadCmd);
|
|
if (!DyldInfoOrErr)
|
|
return None;
|
|
MachO::dyld_info_command DyldInfo = DyldInfoOrErr.get();
|
|
const uint8_t *Ptr =
|
|
reinterpret_cast<const uint8_t *>(getPtr(*this, DyldInfo.export_off));
|
|
return makeArrayRef(Ptr, DyldInfo.export_size);
|
|
}
|
|
|
|
ArrayRef<uint8_t> MachOObjectFile::getUuid() const {
|
|
if (!UuidLoadCmd)
|
|
return None;
|
|
// Returning a pointer is fine as uuid doesn't need endian swapping.
|
|
const char *Ptr = UuidLoadCmd + offsetof(MachO::uuid_command, uuid);
|
|
return makeArrayRef(reinterpret_cast<const uint8_t *>(Ptr), 16);
|
|
}
|
|
|
|
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);
|
|
|
|
uint64_t offset = Index;
|
|
uint64_t data = 0;
|
|
while (uint64_t delta = extractor.getULEB128(&offset)) {
|
|
data += delta;
|
|
Out.push_back(data);
|
|
}
|
|
}
|
|
|
|
bool MachOObjectFile::isRelocatableObject() const {
|
|
return getHeader().filetype == MachO::MH_OBJECT;
|
|
}
|
|
|
|
Expected<std::unique_ptr<MachOObjectFile>>
|
|
ObjectFile::createMachOObjectFile(MemoryBufferRef Buffer,
|
|
uint32_t UniversalCputype,
|
|
uint32_t UniversalIndex) {
|
|
StringRef Magic = Buffer.getBuffer().slice(0, 4);
|
|
if (Magic == "\xFE\xED\xFA\xCE")
|
|
return MachOObjectFile::create(Buffer, false, false,
|
|
UniversalCputype, UniversalIndex);
|
|
if (Magic == "\xCE\xFA\xED\xFE")
|
|
return MachOObjectFile::create(Buffer, true, false,
|
|
UniversalCputype, UniversalIndex);
|
|
if (Magic == "\xFE\xED\xFA\xCF")
|
|
return MachOObjectFile::create(Buffer, false, true,
|
|
UniversalCputype, UniversalIndex);
|
|
if (Magic == "\xCF\xFA\xED\xFE")
|
|
return MachOObjectFile::create(Buffer, true, true,
|
|
UniversalCputype, UniversalIndex);
|
|
return make_error<GenericBinaryError>("Unrecognized MachO magic number",
|
|
object_error::invalid_file_type);
|
|
}
|
|
|
|
StringRef MachOObjectFile::mapDebugSectionName(StringRef Name) const {
|
|
return StringSwitch<StringRef>(Name)
|
|
.Case("debug_str_offs", "debug_str_offsets")
|
|
.Default(Name);
|
|
}
|