mirror of
https://github.com/c64scene-ar/llvm-6502.git
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b28bdbf846
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143151 91177308-0d34-0410-b5e6-96231b3b80d8
1168 lines
36 KiB
C++
1168 lines
36 KiB
C++
//===- MachOObjectFile.cpp - Mach-O object file binding ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MachOObjectFile class, which binds the MachOObject
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// class to the generic ObjectFile wrapper.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/Triple.h"
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#include "llvm/Object/MachO.h"
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#include "llvm/Object/MachOFormat.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <cctype>
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#include <cstring>
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#include <limits>
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using namespace llvm;
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using namespace object;
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namespace llvm {
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namespace object {
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MachOObjectFile::MachOObjectFile(MemoryBuffer *Object, MachOObject *MOO,
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error_code &ec)
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: ObjectFile(Binary::isMachO, Object, ec),
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MachOObj(MOO),
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RegisteredStringTable(std::numeric_limits<uint32_t>::max()) {
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DataRefImpl DRI;
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DRI.d.a = DRI.d.b = 0;
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moveToNextSection(DRI);
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uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
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while (DRI.d.a < LoadCommandCount) {
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Sections.push_back(DRI);
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DRI.d.b++;
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moveToNextSection(DRI);
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}
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}
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ObjectFile *ObjectFile::createMachOObjectFile(MemoryBuffer *Buffer) {
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error_code ec;
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std::string Err;
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MachOObject *MachOObj = MachOObject::LoadFromBuffer(Buffer, &Err);
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if (!MachOObj)
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return NULL;
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return new MachOObjectFile(Buffer, MachOObj, ec);
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}
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/*===-- Symbols -----------------------------------------------------------===*/
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void MachOObjectFile::moveToNextSymbol(DataRefImpl &DRI) const {
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uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
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while (DRI.d.a < LoadCommandCount) {
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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if (LCI.Command.Type == macho::LCT_Symtab) {
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InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
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MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
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if (DRI.d.b < SymtabLoadCmd->NumSymbolTableEntries)
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return;
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}
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DRI.d.a++;
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DRI.d.b = 0;
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}
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}
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void MachOObjectFile::getSymbolTableEntry(DataRefImpl DRI,
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InMemoryStruct<macho::SymbolTableEntry> &Res) const {
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InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
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if (RegisteredStringTable != DRI.d.a) {
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MachOObj->RegisterStringTable(*SymtabLoadCmd);
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RegisteredStringTable = DRI.d.a;
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}
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MachOObj->ReadSymbolTableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
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Res);
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}
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void MachOObjectFile::getSymbol64TableEntry(DataRefImpl DRI,
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InMemoryStruct<macho::Symbol64TableEntry> &Res) const {
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InMemoryStruct<macho::SymtabLoadCommand> SymtabLoadCmd;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSymtabLoadCommand(LCI, SymtabLoadCmd);
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if (RegisteredStringTable != DRI.d.a) {
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MachOObj->RegisterStringTable(*SymtabLoadCmd);
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RegisteredStringTable = DRI.d.a;
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}
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MachOObj->ReadSymbol64TableEntry(SymtabLoadCmd->SymbolTableOffset, DRI.d.b,
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Res);
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}
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error_code MachOObjectFile::getSymbolNext(DataRefImpl DRI,
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SymbolRef &Result) const {
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DRI.d.b++;
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moveToNextSymbol(DRI);
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Result = SymbolRef(DRI, this);
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolName(DataRefImpl DRI,
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StringRef &Result) const {
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(DRI, Entry);
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Result = MachOObj->getStringAtIndex(Entry->StringIndex);
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(DRI, Entry);
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Result = MachOObj->getStringAtIndex(Entry->StringIndex);
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolOffset(DataRefImpl DRI,
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uint64_t &Result) const {
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uint64_t SectionOffset;
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uint8_t SectionIndex;
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(DRI, Entry);
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Result = Entry->Value;
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SectionIndex = Entry->SectionIndex;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(DRI, Entry);
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Result = Entry->Value;
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SectionIndex = Entry->SectionIndex;
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}
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getSectionAddress(Sections[SectionIndex-1], SectionOffset);
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Result -= SectionOffset;
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolAddress(DataRefImpl DRI,
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uint64_t &Result) const {
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(DRI, Entry);
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Result = Entry->Value;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(DRI, Entry);
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Result = Entry->Value;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolSize(DataRefImpl DRI,
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uint64_t &Result) const {
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Result = UnknownAddressOrSize;
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolNMTypeChar(DataRefImpl DRI,
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char &Result) const {
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uint8_t Type, Flags;
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(DRI, Entry);
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Type = Entry->Type;
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Flags = Entry->Flags;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(DRI, Entry);
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Type = Entry->Type;
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Flags = Entry->Flags;
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}
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char Char;
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switch (Type & macho::STF_TypeMask) {
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case macho::STT_Undefined:
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Char = 'u';
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break;
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case macho::STT_Absolute:
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case macho::STT_Section:
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Char = 's';
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break;
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default:
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Char = '?';
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break;
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}
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if (Flags & (macho::STF_External | macho::STF_PrivateExtern))
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Char = toupper(Char);
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Result = Char;
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return object_error::success;
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}
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error_code MachOObjectFile::isSymbolInternal(DataRefImpl DRI,
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bool &Result) const {
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(DRI, Entry);
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Result = Entry->Flags & macho::STF_StabsEntryMask;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(DRI, Entry);
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Result = Entry->Flags & macho::STF_StabsEntryMask;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::isSymbolGlobal(DataRefImpl Symb, bool &Res) const {
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(Symb, Entry);
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Res = Entry->Type & MachO::NlistMaskExternal;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(Symb, Entry);
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Res = Entry->Type & MachO::NlistMaskExternal;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::isSymbolWeak(DataRefImpl Symb, bool &Res) const {
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(Symb, Entry);
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Res = Entry->Flags & (MachO::NListDescWeakRef | MachO::NListDescWeakDef);
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(Symb, Entry);
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Res = Entry->Flags & (MachO::NListDescWeakRef | MachO::NListDescWeakDef);
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}
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return object_error::success;
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}
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error_code MachOObjectFile::isSymbolAbsolute(DataRefImpl Symb, bool &Res) const{
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uint8_t n_type;
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(Symb, Entry);
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n_type = Entry->Type;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(Symb, Entry);
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n_type = Entry->Type;
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}
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Res = (n_type & MachO::NlistMaskType) == MachO::NListTypeAbsolute;
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolSection(DataRefImpl Symb,
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section_iterator &Res) const {
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uint8_t index;
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(Symb, Entry);
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index = Entry->SectionIndex;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(Symb, Entry);
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index = Entry->SectionIndex;
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}
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if (index == 0)
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Res = end_sections();
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else
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Res = section_iterator(SectionRef(Sections[index], this));
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return object_error::success;
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}
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error_code MachOObjectFile::getSymbolType(DataRefImpl Symb,
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SymbolRef::Type &Res) const {
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uint8_t n_type;
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if (MachOObj->is64Bit()) {
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InMemoryStruct<macho::Symbol64TableEntry> Entry;
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getSymbol64TableEntry(Symb, Entry);
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n_type = Entry->Type;
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} else {
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InMemoryStruct<macho::SymbolTableEntry> Entry;
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getSymbolTableEntry(Symb, Entry);
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n_type = Entry->Type;
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}
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Res = SymbolRef::ST_Other;
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// If this is a STAB debugging symbol, we can do nothing more.
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if (n_type & MachO::NlistMaskStab) {
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Res = SymbolRef::ST_Debug;
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return object_error::success;
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}
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switch (n_type & MachO::NlistMaskType) {
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case MachO::NListTypeUndefined :
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Res = SymbolRef::ST_External;
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break;
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case MachO::NListTypeSection :
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Res = SymbolRef::ST_Function;
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break;
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}
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return object_error::success;
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}
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symbol_iterator MachOObjectFile::begin_symbols() const {
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// DRI.d.a = segment number; DRI.d.b = symbol index.
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DataRefImpl DRI;
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DRI.d.a = DRI.d.b = 0;
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moveToNextSymbol(DRI);
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return symbol_iterator(SymbolRef(DRI, this));
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}
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symbol_iterator MachOObjectFile::end_symbols() const {
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DataRefImpl DRI;
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DRI.d.a = MachOObj->getHeader().NumLoadCommands;
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DRI.d.b = 0;
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return symbol_iterator(SymbolRef(DRI, this));
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}
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/*===-- Sections ----------------------------------------------------------===*/
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void MachOObjectFile::moveToNextSection(DataRefImpl &DRI) const {
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uint32_t LoadCommandCount = MachOObj->getHeader().NumLoadCommands;
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while (DRI.d.a < LoadCommandCount) {
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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if (LCI.Command.Type == macho::LCT_Segment) {
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InMemoryStruct<macho::SegmentLoadCommand> SegmentLoadCmd;
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MachOObj->ReadSegmentLoadCommand(LCI, SegmentLoadCmd);
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if (DRI.d.b < SegmentLoadCmd->NumSections)
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return;
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} else if (LCI.Command.Type == macho::LCT_Segment64) {
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InMemoryStruct<macho::Segment64LoadCommand> Segment64LoadCmd;
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MachOObj->ReadSegment64LoadCommand(LCI, Segment64LoadCmd);
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if (DRI.d.b < Segment64LoadCmd->NumSections)
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return;
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}
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DRI.d.a++;
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DRI.d.b = 0;
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}
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}
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error_code MachOObjectFile::getSectionNext(DataRefImpl DRI,
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SectionRef &Result) const {
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DRI.d.b++;
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moveToNextSection(DRI);
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Result = SectionRef(DRI, this);
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return object_error::success;
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}
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void
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MachOObjectFile::getSection(DataRefImpl DRI,
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InMemoryStruct<macho::Section> &Res) const {
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InMemoryStruct<macho::SegmentLoadCommand> SLC;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSegmentLoadCommand(LCI, SLC);
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MachOObj->ReadSection(LCI, DRI.d.b, Res);
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}
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std::size_t MachOObjectFile::getSectionIndex(DataRefImpl Sec) const {
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SectionList::const_iterator loc =
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std::find(Sections.begin(), Sections.end(), Sec);
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assert(loc != Sections.end() && "Sec is not a valid section!");
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return std::distance(Sections.begin(), loc);
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}
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void
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MachOObjectFile::getSection64(DataRefImpl DRI,
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InMemoryStruct<macho::Section64> &Res) const {
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InMemoryStruct<macho::Segment64LoadCommand> SLC;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSegment64LoadCommand(LCI, SLC);
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MachOObj->ReadSection64(LCI, DRI.d.b, Res);
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}
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static bool is64BitLoadCommand(const MachOObject *MachOObj, DataRefImpl DRI) {
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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if (LCI.Command.Type == macho::LCT_Segment64)
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return true;
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assert(LCI.Command.Type == macho::LCT_Segment && "Unexpected Type.");
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return false;
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}
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error_code MachOObjectFile::getSectionName(DataRefImpl DRI,
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StringRef &Result) const {
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// FIXME: thread safety.
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static char result[34];
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Segment64LoadCommand> SLC;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSegment64LoadCommand(LCI, SLC);
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InMemoryStruct<macho::Section64> Sect;
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MachOObj->ReadSection64(LCI, DRI.d.b, Sect);
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strcpy(result, Sect->SegmentName);
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strcat(result, ",");
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strcat(result, Sect->Name);
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} else {
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InMemoryStruct<macho::SegmentLoadCommand> SLC;
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LoadCommandInfo LCI = MachOObj->getLoadCommandInfo(DRI.d.a);
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MachOObj->ReadSegmentLoadCommand(LCI, SLC);
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InMemoryStruct<macho::Section> Sect;
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MachOObj->ReadSection(LCI, DRI.d.b, Sect);
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strcpy(result, Sect->SegmentName);
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strcat(result, ",");
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strcat(result, Sect->Name);
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}
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Result = StringRef(result);
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return object_error::success;
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}
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error_code MachOObjectFile::getSectionAddress(DataRefImpl DRI,
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uint64_t &Result) const {
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Section64> Sect;
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getSection64(DRI, Sect);
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Result = Sect->Address;
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} else {
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InMemoryStruct<macho::Section> Sect;
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getSection(DRI, Sect);
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Result = Sect->Address;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSectionSize(DataRefImpl DRI,
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uint64_t &Result) const {
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Section64> Sect;
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getSection64(DRI, Sect);
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Result = Sect->Size;
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} else {
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InMemoryStruct<macho::Section> Sect;
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getSection(DRI, Sect);
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Result = Sect->Size;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSectionContents(DataRefImpl DRI,
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StringRef &Result) const {
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Section64> Sect;
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getSection64(DRI, Sect);
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Result = MachOObj->getData(Sect->Offset, Sect->Size);
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} else {
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InMemoryStruct<macho::Section> Sect;
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getSection(DRI, Sect);
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Result = MachOObj->getData(Sect->Offset, Sect->Size);
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}
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return object_error::success;
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}
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error_code MachOObjectFile::getSectionAlignment(DataRefImpl DRI,
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uint64_t &Result) const {
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Section64> Sect;
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getSection64(DRI, Sect);
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Result = uint64_t(1) << Sect->Align;
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} else {
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InMemoryStruct<macho::Section> Sect;
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getSection(DRI, Sect);
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Result = uint64_t(1) << Sect->Align;
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}
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return object_error::success;
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}
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error_code MachOObjectFile::isSectionText(DataRefImpl DRI,
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bool &Result) const {
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if (is64BitLoadCommand(MachOObj, DRI)) {
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InMemoryStruct<macho::Section64> Sect;
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getSection64(DRI, Sect);
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Result = !strcmp(Sect->Name, "__text");
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} else {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(DRI, Sect);
|
|
Result = !strcmp(Sect->Name, "__text");
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionData(DataRefImpl DRI,
|
|
bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::isSectionBSS(DataRefImpl DRI,
|
|
bool &Result) const {
|
|
// FIXME: Unimplemented.
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::sectionContainsSymbol(DataRefImpl Sec,
|
|
DataRefImpl Symb,
|
|
bool &Result) const {
|
|
SymbolRef::Type ST;
|
|
getSymbolType(Symb, ST);
|
|
if (ST == SymbolRef::ST_External) {
|
|
Result = false;
|
|
return object_error::success;
|
|
}
|
|
|
|
uint64_t SectBegin, SectEnd;
|
|
getSectionAddress(Sec, SectBegin);
|
|
getSectionSize(Sec, SectEnd);
|
|
SectEnd += SectBegin;
|
|
|
|
if (MachOObj->is64Bit()) {
|
|
InMemoryStruct<macho::Symbol64TableEntry> Entry;
|
|
getSymbol64TableEntry(Symb, Entry);
|
|
uint64_t SymAddr= Entry->Value;
|
|
Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
|
|
} else {
|
|
InMemoryStruct<macho::SymbolTableEntry> Entry;
|
|
getSymbolTableEntry(Symb, Entry);
|
|
uint64_t SymAddr= Entry->Value;
|
|
Result = (SymAddr >= SectBegin) && (SymAddr < SectEnd);
|
|
}
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
relocation_iterator MachOObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
|
|
DataRefImpl ret;
|
|
ret.d.a = 0;
|
|
ret.d.b = getSectionIndex(Sec);
|
|
return relocation_iterator(RelocationRef(ret, this));
|
|
}
|
|
relocation_iterator MachOObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
|
|
uint32_t last_reloc;
|
|
if (is64BitLoadCommand(MachOObj, Sec)) {
|
|
InMemoryStruct<macho::Section64> Sect;
|
|
getSection64(Sec, Sect);
|
|
last_reloc = Sect->NumRelocationTableEntries;
|
|
} else {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(Sec, Sect);
|
|
last_reloc = Sect->NumRelocationTableEntries;
|
|
}
|
|
DataRefImpl ret;
|
|
ret.d.a = last_reloc;
|
|
ret.d.b = getSectionIndex(Sec);
|
|
return relocation_iterator(RelocationRef(ret, this));
|
|
}
|
|
|
|
section_iterator MachOObjectFile::begin_sections() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = DRI.d.b = 0;
|
|
moveToNextSection(DRI);
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
section_iterator MachOObjectFile::end_sections() const {
|
|
DataRefImpl DRI;
|
|
DRI.d.a = MachOObj->getHeader().NumLoadCommands;
|
|
DRI.d.b = 0;
|
|
return section_iterator(SectionRef(DRI, this));
|
|
}
|
|
|
|
/*===-- Relocations -------------------------------------------------------===*/
|
|
|
|
void MachOObjectFile::
|
|
getRelocation(DataRefImpl Rel,
|
|
InMemoryStruct<macho::RelocationEntry> &Res) const {
|
|
uint32_t relOffset;
|
|
if (MachOObj->is64Bit()) {
|
|
InMemoryStruct<macho::Section64> Sect;
|
|
getSection64(Sections[Rel.d.b], Sect);
|
|
relOffset = Sect->RelocationTableOffset;
|
|
} else {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(Sections[Rel.d.b], Sect);
|
|
relOffset = Sect->RelocationTableOffset;
|
|
}
|
|
MachOObj->ReadRelocationEntry(relOffset, Rel.d.a, Res);
|
|
}
|
|
error_code MachOObjectFile::getRelocationNext(DataRefImpl Rel,
|
|
RelocationRef &Res) const {
|
|
++Rel.d.a;
|
|
Res = RelocationRef(Rel, this);
|
|
return object_error::success;
|
|
}
|
|
error_code MachOObjectFile::getRelocationAddress(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
const uint8_t* sectAddress = 0;
|
|
if (MachOObj->is64Bit()) {
|
|
InMemoryStruct<macho::Section64> Sect;
|
|
getSection64(Sections[Rel.d.b], Sect);
|
|
sectAddress += Sect->Address;
|
|
} else {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(Sections[Rel.d.b], Sect);
|
|
sectAddress += Sect->Address;
|
|
}
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
|
|
unsigned Arch = getArch();
|
|
bool isScattered = (Arch != Triple::x86_64) &&
|
|
(RE->Word0 & macho::RF_Scattered);
|
|
uint64_t RelAddr = 0;
|
|
if (isScattered)
|
|
RelAddr = RE->Word0 & 0xFFFFFF;
|
|
else
|
|
RelAddr = RE->Word0;
|
|
|
|
Res = reinterpret_cast<uintptr_t>(sectAddress + RelAddr);
|
|
return object_error::success;
|
|
}
|
|
error_code MachOObjectFile::getRelocationSymbol(DataRefImpl Rel,
|
|
SymbolRef &Res) const {
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
uint32_t SymbolIdx = RE->Word1 & 0xffffff;
|
|
bool isExtern = (RE->Word1 >> 27) & 1;
|
|
|
|
DataRefImpl Sym;
|
|
Sym.d.a = Sym.d.b = 0;
|
|
moveToNextSymbol(Sym);
|
|
if (isExtern) {
|
|
for (unsigned i = 0; i < SymbolIdx; i++) {
|
|
Sym.d.b++;
|
|
moveToNextSymbol(Sym);
|
|
assert(Sym.d.a < MachOObj->getHeader().NumLoadCommands &&
|
|
"Relocation symbol index out of range!");
|
|
}
|
|
}
|
|
Res = SymbolRef(Sym, this);
|
|
return object_error::success;
|
|
}
|
|
error_code MachOObjectFile::getRelocationType(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
Res = RE->Word0;
|
|
Res <<= 32;
|
|
Res |= RE->Word1;
|
|
return object_error::success;
|
|
}
|
|
error_code MachOObjectFile::getRelocationTypeName(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
// TODO: Support scattered relocations.
|
|
StringRef res;
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
|
|
unsigned Arch = getArch();
|
|
bool isScattered = (Arch != Triple::x86_64) &&
|
|
(RE->Word0 & macho::RF_Scattered);
|
|
|
|
unsigned r_type;
|
|
if (isScattered)
|
|
r_type = (RE->Word0 >> 24) & 0xF;
|
|
else
|
|
r_type = (RE->Word1 >> 28) & 0xF;
|
|
|
|
switch (Arch) {
|
|
case Triple::x86: {
|
|
const char* Table[] = {
|
|
"GENERIC_RELOC_VANILLA",
|
|
"GENERIC_RELOC_PAIR",
|
|
"GENERIC_RELOC_SECTDIFF",
|
|
"GENERIC_RELOC_PB_LA_PTR",
|
|
"GENERIC_RELOC_LOCAL_SECTDIFF",
|
|
"GENERIC_RELOC_TLV" };
|
|
|
|
if (r_type > 6)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[r_type];
|
|
break;
|
|
}
|
|
case Triple::x86_64: {
|
|
const char* 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 (r_type > 9)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[r_type];
|
|
break;
|
|
}
|
|
case Triple::arm: {
|
|
const char* 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 (r_type > 9)
|
|
res = "Unknown";
|
|
else
|
|
res = Table[r_type];
|
|
break;
|
|
}
|
|
case Triple::ppc: {
|
|
const char* Table[] = {
|
|
"PPC_RELOC_VANILLA",
|
|
"PPC_RELOC_PAIR",
|
|
"PPC_RELOC_BR14",
|
|
"PPC_RELOC_BR24",
|
|
"PPC_RELOC_HI16",
|
|
"PPC_RELOC_LO16",
|
|
"PPC_RELOC_HA16",
|
|
"PPC_RELOC_LO14",
|
|
"PPC_RELOC_SECTDIFF",
|
|
"PPC_RELOC_PB_LA_PTR",
|
|
"PPC_RELOC_HI16_SECTDIFF",
|
|
"PPC_RELOC_LO16_SECTDIFF",
|
|
"PPC_RELOC_HA16_SECTDIFF",
|
|
"PPC_RELOC_JBSR",
|
|
"PPC_RELOC_LO14_SECTDIFF",
|
|
"PPC_RELOC_LOCAL_SECTDIFF" };
|
|
|
|
res = Table[r_type];
|
|
break;
|
|
}
|
|
case Triple::UnknownArch:
|
|
res = "Unknown";
|
|
break;
|
|
}
|
|
Result.append(res.begin(), res.end());
|
|
return object_error::success;
|
|
}
|
|
error_code MachOObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
|
|
int64_t &Res) const {
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
bool isExtern = (RE->Word1 >> 27) & 1;
|
|
Res = 0;
|
|
if (!isExtern) {
|
|
const uint8_t* sectAddress = base();
|
|
if (MachOObj->is64Bit()) {
|
|
InMemoryStruct<macho::Section64> Sect;
|
|
getSection64(Sections[Rel.d.b], Sect);
|
|
sectAddress += Sect->Offset;
|
|
} else {
|
|
InMemoryStruct<macho::Section> Sect;
|
|
getSection(Sections[Rel.d.b], Sect);
|
|
sectAddress += Sect->Offset;
|
|
}
|
|
Res = reinterpret_cast<uintptr_t>(sectAddress);
|
|
}
|
|
return object_error::success;
|
|
}
|
|
|
|
// Helper to advance a section or symbol iterator multiple increments at a time.
|
|
template<class T>
|
|
error_code advance(T &it, size_t Val) {
|
|
error_code ec;
|
|
while (Val--) {
|
|
it.increment(ec);
|
|
}
|
|
return ec;
|
|
}
|
|
|
|
template<class T>
|
|
void advanceTo(T &it, size_t Val) {
|
|
if (error_code ec = advance(it, Val))
|
|
report_fatal_error(ec.message());
|
|
}
|
|
|
|
void MachOObjectFile::printRelocationTargetName(
|
|
InMemoryStruct<macho::RelocationEntry>& RE,
|
|
raw_string_ostream &fmt) const {
|
|
unsigned Arch = getArch();
|
|
bool isScattered = (Arch != Triple::x86_64) &&
|
|
(RE->Word0 & macho::RF_Scattered);
|
|
|
|
// Target of a scattered relocation is an address. In the interest of
|
|
// generating pretty output, scan through the symbol table looking for a
|
|
// symbol that aligns with that address. If we find one, print it.
|
|
// Otherwise, we just print the hex address of the target.
|
|
if (isScattered) {
|
|
uint32_t Val = RE->Word1;
|
|
|
|
error_code ec;
|
|
for (symbol_iterator SI = begin_symbols(), SE = end_symbols(); SI != SE;
|
|
SI.increment(ec)) {
|
|
if (ec) report_fatal_error(ec.message());
|
|
|
|
uint64_t Addr;
|
|
StringRef Name;
|
|
|
|
if ((ec = SI->getAddress(Addr)))
|
|
report_fatal_error(ec.message());
|
|
if (Addr != Val) continue;
|
|
if ((ec = SI->getName(Name)))
|
|
report_fatal_error(ec.message());
|
|
fmt << Name;
|
|
return;
|
|
}
|
|
|
|
// If we couldn't find a symbol that this relocation refers to, try
|
|
// to find a section beginning instead.
|
|
for (section_iterator SI = begin_sections(), SE = end_sections(); SI != SE;
|
|
SI.increment(ec)) {
|
|
if (ec) report_fatal_error(ec.message());
|
|
|
|
uint64_t Addr;
|
|
StringRef Name;
|
|
|
|
if ((ec = SI->getAddress(Addr)))
|
|
report_fatal_error(ec.message());
|
|
if (Addr != Val) continue;
|
|
if ((ec = SI->getName(Name)))
|
|
report_fatal_error(ec.message());
|
|
fmt << Name;
|
|
return;
|
|
}
|
|
|
|
fmt << format("0x%x", Val);
|
|
return;
|
|
}
|
|
|
|
StringRef S;
|
|
bool isExtern = (RE->Word1 >> 27) & 1;
|
|
uint32_t Val = RE->Word1 & 0xFFFFFF;
|
|
|
|
if (isExtern) {
|
|
symbol_iterator SI = begin_symbols();
|
|
advanceTo(SI, Val);
|
|
SI->getName(S);
|
|
} else {
|
|
section_iterator SI = begin_sections();
|
|
advanceTo(SI, Val);
|
|
SI->getName(S);
|
|
}
|
|
|
|
fmt << S;
|
|
}
|
|
|
|
error_code MachOObjectFile::getRelocationValueString(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
|
|
unsigned Arch = getArch();
|
|
bool isScattered = (Arch != Triple::x86_64) &&
|
|
(RE->Word0 & macho::RF_Scattered);
|
|
|
|
std::string fmtbuf;
|
|
raw_string_ostream fmt(fmtbuf);
|
|
|
|
unsigned Type;
|
|
if (isScattered)
|
|
Type = (RE->Word0 >> 24) & 0xF;
|
|
else
|
|
Type = (RE->Word1 >> 28) & 0xF;
|
|
|
|
bool isPCRel;
|
|
if (isScattered)
|
|
isPCRel = ((RE->Word0 >> 30) & 1);
|
|
else
|
|
isPCRel = ((RE->Word1 >> 24) & 1);
|
|
|
|
// Determine any addends that should be displayed with the relocation.
|
|
// These require decoding the relocation type, which is triple-specific.
|
|
|
|
// X86_64 has entirely custom relocation types.
|
|
if (Arch == Triple::x86_64) {
|
|
bool isPCRel = ((RE->Word1 >> 24) & 1);
|
|
|
|
switch (Type) {
|
|
case macho::RIT_X86_64_GOTLoad: // X86_64_RELOC_GOT_LOAD
|
|
case macho::RIT_X86_64_GOT: { // X86_64_RELOC_GOT
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "@GOT";
|
|
if (isPCRel) fmt << "PCREL";
|
|
break;
|
|
}
|
|
case macho::RIT_X86_64_Subtractor: { // X86_64_RELOC_SUBTRACTOR
|
|
InMemoryStruct<macho::RelocationEntry> RENext;
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
getRelocation(RelNext, RENext);
|
|
|
|
// X86_64_SUBTRACTOR must be followed by a relocation of type
|
|
// X86_64_RELOC_UNSIGNED.
|
|
// NOTE: Scattered relocations don't exist on x86_64.
|
|
unsigned RType = (RENext->Word1 >> 28) & 0xF;
|
|
if (RType != 0)
|
|
report_fatal_error("Expected X86_64_RELOC_UNSIGNED after "
|
|
"X86_64_RELOC_SUBTRACTOR.");
|
|
|
|
// The X86_64_RELOC_UNSIGNED contains the minuend symbol,
|
|
// X86_64_SUBTRACTOR contains to the subtrahend.
|
|
printRelocationTargetName(RENext, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(RE, fmt);
|
|
}
|
|
case macho::RIT_X86_64_TLV:
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "@TLV";
|
|
if (isPCRel) fmt << "P";
|
|
break;
|
|
case macho::RIT_X86_64_Signed1: // X86_64_RELOC_SIGNED1
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "-1";
|
|
break;
|
|
case macho::RIT_X86_64_Signed2: // X86_64_RELOC_SIGNED2
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "-2";
|
|
break;
|
|
case macho::RIT_X86_64_Signed4: // X86_64_RELOC_SIGNED4
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "-4";
|
|
break;
|
|
default:
|
|
printRelocationTargetName(RE, fmt);
|
|
break;
|
|
}
|
|
// X86 and ARM share some relocation types in common.
|
|
} else if (Arch == Triple::x86 || Arch == Triple::arm) {
|
|
// Generic relocation types...
|
|
switch (Type) {
|
|
case macho::RIT_Pair: // GENERIC_RELOC_PAIR - prints no info
|
|
return object_error::success;
|
|
case macho::RIT_Difference: { // GENERIC_RELOC_SECTDIFF
|
|
InMemoryStruct<macho::RelocationEntry> RENext;
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
getRelocation(RelNext, RENext);
|
|
|
|
// X86 sect diff's must be followed by a relocation of type
|
|
// GENERIC_RELOC_PAIR.
|
|
bool isNextScattered = (Arch != Triple::x86_64) &&
|
|
(RENext->Word0 & macho::RF_Scattered);
|
|
unsigned RType;
|
|
if (isNextScattered)
|
|
RType = (RENext->Word0 >> 24) & 0xF;
|
|
else
|
|
RType = (RENext->Word1 >> 28) & 0xF;
|
|
if (RType != 1)
|
|
report_fatal_error("Expected GENERIC_RELOC_PAIR after "
|
|
"GENERIC_RELOC_SECTDIFF.");
|
|
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(RENext, fmt);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Arch == Triple::x86) {
|
|
// All X86 relocations that need special printing were already
|
|
// handled in the generic code.
|
|
switch (Type) {
|
|
case macho::RIT_Generic_LocalDifference:{// GENERIC_RELOC_LOCAL_SECTDIFF
|
|
InMemoryStruct<macho::RelocationEntry> RENext;
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
getRelocation(RelNext, RENext);
|
|
|
|
// X86 sect diff's must be followed by a relocation of type
|
|
// GENERIC_RELOC_PAIR.
|
|
bool isNextScattered = (Arch != Triple::x86_64) &&
|
|
(RENext->Word0 & macho::RF_Scattered);
|
|
unsigned RType;
|
|
if (isNextScattered)
|
|
RType = (RENext->Word0 >> 24) & 0xF;
|
|
else
|
|
RType = (RENext->Word1 >> 28) & 0xF;
|
|
if (RType != 1)
|
|
report_fatal_error("Expected GENERIC_RELOC_PAIR after "
|
|
"GENERIC_RELOC_LOCAL_SECTDIFF.");
|
|
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "-";
|
|
printRelocationTargetName(RENext, fmt);
|
|
break;
|
|
}
|
|
case macho::RIT_Generic_TLV: {
|
|
printRelocationTargetName(RE, fmt);
|
|
fmt << "@TLV";
|
|
if (isPCRel) fmt << "P";
|
|
break;
|
|
}
|
|
default:
|
|
printRelocationTargetName(RE, fmt);
|
|
}
|
|
} else { // ARM-specific relocations
|
|
switch (Type) {
|
|
case macho::RIT_ARM_Half: // ARM_RELOC_HALF
|
|
case macho::RIT_ARM_HalfDifference: { // ARM_RELOC_HALF_SECTDIFF
|
|
// Half relocations steal a bit from the length field to encode
|
|
// whether this is an upper16 or a lower16 relocation.
|
|
bool isUpper;
|
|
if (isScattered)
|
|
isUpper = (RE->Word0 >> 28) & 1;
|
|
else
|
|
isUpper = (RE->Word1 >> 25) & 1;
|
|
|
|
if (isUpper)
|
|
fmt << ":upper16:(";
|
|
else
|
|
fmt << ":lower16:(";
|
|
printRelocationTargetName(RE, fmt);
|
|
|
|
InMemoryStruct<macho::RelocationEntry> RENext;
|
|
DataRefImpl RelNext = Rel;
|
|
RelNext.d.a++;
|
|
getRelocation(RelNext, RENext);
|
|
|
|
// ARM half relocs must be followed by a relocation of type
|
|
// ARM_RELOC_PAIR.
|
|
bool isNextScattered = (Arch != Triple::x86_64) &&
|
|
(RENext->Word0 & macho::RF_Scattered);
|
|
unsigned RType;
|
|
if (isNextScattered)
|
|
RType = (RENext->Word0 >> 24) & 0xF;
|
|
else
|
|
RType = (RENext->Word1 >> 28) & 0xF;
|
|
|
|
if (RType != 1)
|
|
report_fatal_error("Expected ARM_RELOC_PAIR after "
|
|
"GENERIC_RELOC_HALF");
|
|
|
|
// NOTE: The half of the target virtual address is stashed in the
|
|
// address field of the secondary relocation, but we can't reverse
|
|
// engineer the constant offset from it without decoding the movw/movt
|
|
// instruction to find the other half in its immediate field.
|
|
|
|
// ARM_RELOC_HALF_SECTDIFF encodes the second section in the
|
|
// symbol/section pointer of the follow-on relocation.
|
|
if (Type == macho::RIT_ARM_HalfDifference) {
|
|
fmt << "-";
|
|
printRelocationTargetName(RENext, fmt);
|
|
}
|
|
|
|
fmt << ")";
|
|
break;
|
|
}
|
|
default: {
|
|
printRelocationTargetName(RE, fmt);
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
printRelocationTargetName(RE, fmt);
|
|
|
|
fmt.flush();
|
|
Result.append(fmtbuf.begin(), fmtbuf.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code MachOObjectFile::getRelocationHidden(DataRefImpl Rel,
|
|
bool &Result) const {
|
|
InMemoryStruct<macho::RelocationEntry> RE;
|
|
getRelocation(Rel, RE);
|
|
|
|
unsigned Arch = getArch();
|
|
bool isScattered = (Arch != Triple::x86_64) &&
|
|
(RE->Word0 & macho::RF_Scattered);
|
|
unsigned Type;
|
|
if (isScattered)
|
|
Type = (RE->Word0 >> 24) & 0xF;
|
|
else
|
|
Type = (RE->Word1 >> 28) & 0xF;
|
|
|
|
Result = false;
|
|
|
|
// On arches that use the generic relocations, GENERIC_RELOC_PAIR
|
|
// is always hidden.
|
|
if (Arch == Triple::x86 || Arch == Triple::arm) {
|
|
if (Type == macho::RIT_Pair) Result = true;
|
|
} else if (Arch == Triple::x86_64) {
|
|
// On x86_64, X86_64_RELOC_UNSIGNED is hidden only when it follows
|
|
// an X864_64_RELOC_SUBTRACTOR.
|
|
if (Type == macho::RIT_X86_64_Unsigned && Rel.d.a > 0) {
|
|
DataRefImpl RelPrev = Rel;
|
|
RelPrev.d.a--;
|
|
InMemoryStruct<macho::RelocationEntry> REPrev;
|
|
getRelocation(RelPrev, REPrev);
|
|
|
|
unsigned PrevType = (REPrev->Word1 >> 28) & 0xF;
|
|
|
|
if (PrevType == macho::RIT_X86_64_Subtractor) Result = true;
|
|
}
|
|
}
|
|
|
|
return object_error::success;
|
|
}
|
|
|
|
/*===-- Miscellaneous -----------------------------------------------------===*/
|
|
|
|
uint8_t MachOObjectFile::getBytesInAddress() const {
|
|
return MachOObj->is64Bit() ? 8 : 4;
|
|
}
|
|
|
|
StringRef MachOObjectFile::getFileFormatName() const {
|
|
if (!MachOObj->is64Bit()) {
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeI386:
|
|
return "Mach-O 32-bit i386";
|
|
case llvm::MachO::CPUTypeARM:
|
|
return "Mach-O arm";
|
|
case llvm::MachO::CPUTypePowerPC:
|
|
return "Mach-O 32-bit ppc";
|
|
default:
|
|
assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 0 &&
|
|
"64-bit object file when we're not 64-bit?");
|
|
return "Mach-O 32-bit unknown";
|
|
}
|
|
}
|
|
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeX86_64:
|
|
return "Mach-O 64-bit x86-64";
|
|
case llvm::MachO::CPUTypePowerPC64:
|
|
return "Mach-O 64-bit ppc64";
|
|
default:
|
|
assert((MachOObj->getHeader().CPUType & llvm::MachO::CPUArchABI64) == 1 &&
|
|
"32-bit object file when we're 64-bit?");
|
|
return "Mach-O 64-bit unknown";
|
|
}
|
|
}
|
|
|
|
unsigned MachOObjectFile::getArch() const {
|
|
switch (MachOObj->getHeader().CPUType) {
|
|
case llvm::MachO::CPUTypeI386:
|
|
return Triple::x86;
|
|
case llvm::MachO::CPUTypeX86_64:
|
|
return Triple::x86_64;
|
|
case llvm::MachO::CPUTypeARM:
|
|
return Triple::arm;
|
|
case llvm::MachO::CPUTypePowerPC:
|
|
return Triple::ppc;
|
|
case llvm::MachO::CPUTypePowerPC64:
|
|
return Triple::ppc64;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
} // end namespace object
|
|
} // end namespace llvm
|