837 lines
28 KiB
C++
837 lines
28 KiB
C++
//===- COFFObjectFile.cpp - COFF object file implementation -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the COFFObjectFile class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Object/COFF.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/ADT/Triple.h"
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using namespace llvm;
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using namespace object;
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namespace {
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using support::ulittle8_t;
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using support::ulittle16_t;
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using support::ulittle32_t;
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using support::little16_t;
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}
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namespace {
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// Returns false if size is greater than the buffer size. And sets ec.
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bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) {
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if (m->getBufferSize() < size) {
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ec = object_error::unexpected_eof;
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return false;
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}
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return true;
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}
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// Returns false if any bytes in [addr, addr + size) fall outsize of m.
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bool checkAddr(const MemoryBuffer *m,
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error_code &ec,
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uintptr_t addr,
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uint64_t size) {
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if (addr + size < addr ||
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addr + size < size ||
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addr + size > uintptr_t(m->getBufferEnd())) {
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ec = object_error::unexpected_eof;
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return false;
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}
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return true;
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}
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}
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const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
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const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p);
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# ifndef NDEBUG
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// Verify that the symbol points to a valid entry in the symbol table.
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uintptr_t offset = uintptr_t(addr) - uintptr_t(base());
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if (offset < Header->PointerToSymbolTable
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|| offset >= Header->PointerToSymbolTable
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+ (Header->NumberOfSymbols * sizeof(coff_symbol)))
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report_fatal_error("Symbol was outside of symbol table.");
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assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
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== 0 && "Symbol did not point to the beginning of a symbol");
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# endif
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return addr;
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}
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const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
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const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p);
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# ifndef NDEBUG
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// Verify that the section points to a valid entry in the section table.
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if (addr < SectionTable
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|| addr >= (SectionTable + Header->NumberOfSections))
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report_fatal_error("Section was outside of section table.");
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uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
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assert(offset % sizeof(coff_section) == 0 &&
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"Section did not point to the beginning of a section");
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# endif
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return addr;
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}
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error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
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SymbolRef &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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symb += 1 + symb->NumberOfAuxSymbols;
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Symb.p = reinterpret_cast<uintptr_t>(symb);
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Result = SymbolRef(Symb, this);
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
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StringRef &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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return getSymbolName(symb, Result);
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}
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error_code COFFObjectFile::getSymbolFileOffset(DataRefImpl Symb,
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uint64_t &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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const coff_section *Section = NULL;
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if (error_code ec = getSection(symb->SectionNumber, Section))
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return ec;
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char Type;
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if (error_code ec = getSymbolNMTypeChar(Symb, Type))
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return ec;
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if (Type == 'U' || Type == 'w')
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Result = UnknownAddressOrSize;
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else if (Section)
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Result = Section->PointerToRawData + symb->Value;
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else
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Result = symb->Value;
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb,
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uint64_t &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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const coff_section *Section = NULL;
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if (error_code ec = getSection(symb->SectionNumber, Section))
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return ec;
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char Type;
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if (error_code ec = getSymbolNMTypeChar(Symb, Type))
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return ec;
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if (Type == 'U' || Type == 'w')
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Result = UnknownAddressOrSize;
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else if (Section)
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Result = Section->VirtualAddress + symb->Value;
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else
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Result = symb->Value;
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolType(DataRefImpl Symb,
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SymbolRef::Type &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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Result = SymbolRef::ST_Other;
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
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symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED) {
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Result = SymbolRef::ST_Unknown;
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} else {
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if (symb->getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION) {
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Result = SymbolRef::ST_Function;
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} else {
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char Type;
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if (error_code ec = getSymbolNMTypeChar(Symb, Type))
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return ec;
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if (Type == 'r' || Type == 'R') {
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Result = SymbolRef::ST_Data;
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}
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}
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}
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolFlags(DataRefImpl Symb,
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uint32_t &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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Result = SymbolRef::SF_None;
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// TODO: Correctly set SF_FormatSpecific, SF_ThreadLocal, SF_Common
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
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symb->SectionNumber == COFF::IMAGE_SYM_UNDEFINED)
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Result |= SymbolRef::SF_Undefined;
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// TODO: This are certainly too restrictive.
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
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Result |= SymbolRef::SF_Global;
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL)
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Result |= SymbolRef::SF_Weak;
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if (symb->SectionNumber == COFF::IMAGE_SYM_ABSOLUTE)
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Result |= SymbolRef::SF_Absolute;
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
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uint64_t &Result) const {
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// FIXME: Return the correct size. This requires looking at all the symbols
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// in the same section as this symbol, and looking for either the next
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// symbol, or the end of the section.
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const coff_symbol *symb = toSymb(Symb);
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const coff_section *Section = NULL;
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if (error_code ec = getSection(symb->SectionNumber, Section))
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return ec;
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char Type;
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if (error_code ec = getSymbolNMTypeChar(Symb, Type))
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return ec;
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if (Type == 'U' || Type == 'w')
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Result = UnknownAddressOrSize;
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else if (Section)
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Result = Section->SizeOfRawData - symb->Value;
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else
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Result = 0;
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
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char &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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StringRef name;
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if (error_code ec = getSymbolName(Symb, name))
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return ec;
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char ret = StringSwitch<char>(name)
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.StartsWith(".debug", 'N')
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.StartsWith(".sxdata", 'N')
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.Default('?');
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if (ret != '?') {
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Result = ret;
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return object_error::success;
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}
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uint32_t Characteristics = 0;
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if (symb->SectionNumber > 0) {
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const coff_section *Section = NULL;
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if (error_code ec = getSection(symb->SectionNumber, Section))
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return ec;
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Characteristics = Section->Characteristics;
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}
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switch (symb->SectionNumber) {
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case COFF::IMAGE_SYM_UNDEFINED:
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// Check storage classes.
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
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Result = 'w';
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return object_error::success; // Don't do ::toupper.
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} else if (symb->Value != 0) // Check for common symbols.
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ret = 'c';
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else
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ret = 'u';
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break;
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case COFF::IMAGE_SYM_ABSOLUTE:
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ret = 'a';
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break;
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case COFF::IMAGE_SYM_DEBUG:
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ret = 'n';
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break;
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default:
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// Check section type.
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if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
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ret = 't';
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else if ( Characteristics & COFF::IMAGE_SCN_MEM_READ
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&& ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
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ret = 'r';
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else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
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ret = 'd';
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else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
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ret = 'b';
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else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
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ret = 'i';
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// Check for section symbol.
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else if ( symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
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&& symb->Value == 0)
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ret = 's';
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}
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if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
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ret = ::toupper(static_cast<unsigned char>(ret));
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Result = ret;
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolSection(DataRefImpl Symb,
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section_iterator &Result) const {
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const coff_symbol *symb = toSymb(Symb);
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if (symb->SectionNumber <= COFF::IMAGE_SYM_UNDEFINED)
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Result = end_sections();
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else {
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const coff_section *sec = 0;
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if (error_code ec = getSection(symb->SectionNumber, sec)) return ec;
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DataRefImpl Sec;
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Sec.p = reinterpret_cast<uintptr_t>(sec);
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Result = section_iterator(SectionRef(Sec, this));
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}
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return object_error::success;
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}
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error_code COFFObjectFile::getSymbolValue(DataRefImpl Symb,
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uint64_t &Val) const {
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report_fatal_error("getSymbolValue unimplemented in COFFObjectFile");
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}
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error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
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SectionRef &Result) const {
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const coff_section *sec = toSec(Sec);
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sec += 1;
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Sec.p = reinterpret_cast<uintptr_t>(sec);
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Result = SectionRef(Sec, this);
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return object_error::success;
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}
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error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
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StringRef &Result) const {
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const coff_section *sec = toSec(Sec);
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return getSectionName(sec, Result);
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}
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error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
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uint64_t &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->VirtualAddress;
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return object_error::success;
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}
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error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
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uint64_t &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->SizeOfRawData;
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return object_error::success;
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}
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error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
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StringRef &Result) const {
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const coff_section *sec = toSec(Sec);
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ArrayRef<uint8_t> Res;
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error_code EC = getSectionContents(sec, Res);
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Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
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return EC;
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}
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error_code COFFObjectFile::getSectionAlignment(DataRefImpl Sec,
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uint64_t &Res) const {
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const coff_section *sec = toSec(Sec);
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if (!sec)
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return object_error::parse_failed;
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Res = uint64_t(1) << (((sec->Characteristics & 0x00F00000) >> 20) - 1);
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
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bool &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionData(DataRefImpl Sec,
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bool &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionBSS(DataRefImpl Sec,
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bool &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionRequiredForExecution(DataRefImpl Sec,
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bool &Result) const {
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// FIXME: Unimplemented
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Result = true;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionVirtual(DataRefImpl Sec,
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bool &Result) const {
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const coff_section *sec = toSec(Sec);
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Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionZeroInit(DataRefImpl Sec,
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bool &Result) const {
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// FIXME: Unimplemented.
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Result = false;
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return object_error::success;
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}
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error_code COFFObjectFile::isSectionReadOnlyData(DataRefImpl Sec,
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bool &Result) const {
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// FIXME: Unimplemented.
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Result = false;
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return object_error::success;
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}
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error_code COFFObjectFile::sectionContainsSymbol(DataRefImpl Sec,
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DataRefImpl Symb,
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bool &Result) const {
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const coff_section *sec = toSec(Sec);
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const coff_symbol *symb = toSymb(Symb);
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const coff_section *symb_sec = 0;
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if (error_code ec = getSection(symb->SectionNumber, symb_sec)) return ec;
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if (symb_sec == sec)
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Result = true;
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else
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Result = false;
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return object_error::success;
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}
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relocation_iterator COFFObjectFile::getSectionRelBegin(DataRefImpl Sec) const {
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const coff_section *sec = toSec(Sec);
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DataRefImpl ret;
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if (sec->NumberOfRelocations == 0)
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ret.p = 0;
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else
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ret.p = reinterpret_cast<uintptr_t>(base() + sec->PointerToRelocations);
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return relocation_iterator(RelocationRef(ret, this));
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}
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relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
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const coff_section *sec = toSec(Sec);
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DataRefImpl ret;
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if (sec->NumberOfRelocations == 0)
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ret.p = 0;
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else
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ret.p = reinterpret_cast<uintptr_t>(
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reinterpret_cast<const coff_relocation*>(
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base() + sec->PointerToRelocations)
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+ sec->NumberOfRelocations);
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return relocation_iterator(RelocationRef(ret, this));
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}
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COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
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: ObjectFile(Binary::ID_COFF, Object)
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, Header(0)
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, SectionTable(0)
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, SymbolTable(0)
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, StringTable(0)
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, StringTableSize(0) {
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// Check that we at least have enough room for a header.
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if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
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// The actual starting location of the COFF header in the file. This can be
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// non-zero in PE/COFF files.
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uint64_t HeaderStart = 0;
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// Check if this is a PE/COFF file.
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if (base()[0] == 0x4d && base()[1] == 0x5a) {
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// PE/COFF, seek through MS-DOS compatibility stub and 4-byte
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// PE signature to find 'normal' COFF header.
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if (!checkSize(Data, ec, 0x3c + 8)) return;
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HeaderStart = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
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// Check the PE header. ("PE\0\0")
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if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) {
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ec = object_error::parse_failed;
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return;
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}
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HeaderStart += 4; // Skip the PE Header.
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}
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Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
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if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
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return;
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SectionTable =
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reinterpret_cast<const coff_section *>( base()
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+ HeaderStart
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+ sizeof(coff_file_header)
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+ Header->SizeOfOptionalHeader);
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if (!checkAddr(Data, ec, uintptr_t(SectionTable),
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Header->NumberOfSections * sizeof(coff_section)))
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return;
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if (Header->PointerToSymbolTable != 0) {
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SymbolTable =
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reinterpret_cast<const coff_symbol *>(base()
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+ Header->PointerToSymbolTable);
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if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
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Header->NumberOfSymbols * sizeof(coff_symbol)))
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return;
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// Find string table.
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StringTable = reinterpret_cast<const char *>(base())
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+ Header->PointerToSymbolTable
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+ Header->NumberOfSymbols * sizeof(coff_symbol);
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if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
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return;
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StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
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if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
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return;
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// Check that the string table is null terminated if has any in it.
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if (StringTableSize < 4
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|| (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
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ec = object_error::parse_failed;
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return;
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}
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}
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ec = object_error::success;
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}
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symbol_iterator COFFObjectFile::begin_symbols() const {
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|
DataRefImpl ret;
|
|
ret.p = reinterpret_cast<intptr_t>(SymbolTable);
|
|
return symbol_iterator(SymbolRef(ret, this));
|
|
}
|
|
|
|
symbol_iterator COFFObjectFile::end_symbols() const {
|
|
// The symbol table ends where the string table begins.
|
|
DataRefImpl ret;
|
|
ret.p = reinterpret_cast<intptr_t>(StringTable);
|
|
return symbol_iterator(SymbolRef(ret, this));
|
|
}
|
|
|
|
symbol_iterator COFFObjectFile::begin_dynamic_symbols() const {
|
|
// TODO: implement
|
|
report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile");
|
|
}
|
|
|
|
symbol_iterator COFFObjectFile::end_dynamic_symbols() const {
|
|
// TODO: implement
|
|
report_fatal_error("Dynamic symbols unimplemented in COFFObjectFile");
|
|
}
|
|
|
|
library_iterator COFFObjectFile::begin_libraries_needed() const {
|
|
// TODO: implement
|
|
report_fatal_error("Libraries needed unimplemented in COFFObjectFile");
|
|
}
|
|
|
|
library_iterator COFFObjectFile::end_libraries_needed() const {
|
|
// TODO: implement
|
|
report_fatal_error("Libraries needed unimplemented in COFFObjectFile");
|
|
}
|
|
|
|
StringRef COFFObjectFile::getLoadName() const {
|
|
// COFF does not have this field.
|
|
return "";
|
|
}
|
|
|
|
|
|
section_iterator COFFObjectFile::begin_sections() const {
|
|
DataRefImpl ret;
|
|
ret.p = reinterpret_cast<intptr_t>(SectionTable);
|
|
return section_iterator(SectionRef(ret, this));
|
|
}
|
|
|
|
section_iterator COFFObjectFile::end_sections() const {
|
|
DataRefImpl ret;
|
|
ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
|
|
return section_iterator(SectionRef(ret, this));
|
|
}
|
|
|
|
uint8_t COFFObjectFile::getBytesInAddress() const {
|
|
return getArch() == Triple::x86_64 ? 8 : 4;
|
|
}
|
|
|
|
StringRef COFFObjectFile::getFileFormatName() const {
|
|
switch(Header->Machine) {
|
|
case COFF::IMAGE_FILE_MACHINE_I386:
|
|
return "COFF-i386";
|
|
case COFF::IMAGE_FILE_MACHINE_AMD64:
|
|
return "COFF-x86-64";
|
|
default:
|
|
return "COFF-<unknown arch>";
|
|
}
|
|
}
|
|
|
|
unsigned COFFObjectFile::getArch() const {
|
|
switch(Header->Machine) {
|
|
case COFF::IMAGE_FILE_MACHINE_I386:
|
|
return Triple::x86;
|
|
case COFF::IMAGE_FILE_MACHINE_AMD64:
|
|
return Triple::x86_64;
|
|
default:
|
|
return Triple::UnknownArch;
|
|
}
|
|
}
|
|
|
|
error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
|
|
Res = Header;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getSection(int32_t index,
|
|
const coff_section *&Result) const {
|
|
// Check for special index values.
|
|
if (index == COFF::IMAGE_SYM_UNDEFINED ||
|
|
index == COFF::IMAGE_SYM_ABSOLUTE ||
|
|
index == COFF::IMAGE_SYM_DEBUG)
|
|
Result = NULL;
|
|
else if (index > 0 && index <= Header->NumberOfSections)
|
|
// We already verified the section table data, so no need to check again.
|
|
Result = SectionTable + (index - 1);
|
|
else
|
|
return object_error::parse_failed;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getString(uint32_t offset,
|
|
StringRef &Result) const {
|
|
if (StringTableSize <= 4)
|
|
// Tried to get a string from an empty string table.
|
|
return object_error::parse_failed;
|
|
if (offset >= StringTableSize)
|
|
return object_error::unexpected_eof;
|
|
Result = StringRef(StringTable + offset);
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getSymbol(uint32_t index,
|
|
const coff_symbol *&Result) const {
|
|
if (index < Header->NumberOfSymbols)
|
|
Result = SymbolTable + index;
|
|
else
|
|
return object_error::parse_failed;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getSymbolName(const coff_symbol *symbol,
|
|
StringRef &Res) const {
|
|
// Check for string table entry. First 4 bytes are 0.
|
|
if (symbol->Name.Offset.Zeroes == 0) {
|
|
uint32_t Offset = symbol->Name.Offset.Offset;
|
|
if (error_code ec = getString(Offset, Res))
|
|
return ec;
|
|
return object_error::success;
|
|
}
|
|
|
|
if (symbol->Name.ShortName[7] == 0)
|
|
// Null terminated, let ::strlen figure out the length.
|
|
Res = StringRef(symbol->Name.ShortName);
|
|
else
|
|
// Not null terminated, use all 8 bytes.
|
|
Res = StringRef(symbol->Name.ShortName, 8);
|
|
return object_error::success;
|
|
}
|
|
|
|
ArrayRef<uint8_t> COFFObjectFile::getSymbolAuxData(
|
|
const coff_symbol *symbol) const {
|
|
const uint8_t *aux = NULL;
|
|
|
|
if ( symbol->NumberOfAuxSymbols > 0 ) {
|
|
// AUX data comes immediately after the symbol in COFF
|
|
aux = reinterpret_cast<const uint8_t *>(symbol + 1);
|
|
# ifndef NDEBUG
|
|
// Verify that the aux symbol points to a valid entry in the symbol table.
|
|
uintptr_t offset = uintptr_t(aux) - uintptr_t(base());
|
|
if (offset < Header->PointerToSymbolTable
|
|
|| offset >= Header->PointerToSymbolTable
|
|
+ (Header->NumberOfSymbols * sizeof(coff_symbol)))
|
|
report_fatal_error("Aux Symbol data was outside of symbol table.");
|
|
|
|
assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
|
|
== 0 && "Aux Symbol data did not point to the beginning of a symbol");
|
|
# endif
|
|
}
|
|
return ArrayRef<uint8_t>(aux, symbol->NumberOfAuxSymbols * sizeof(coff_symbol));
|
|
}
|
|
|
|
error_code COFFObjectFile::getSectionName(const coff_section *Sec,
|
|
StringRef &Res) const {
|
|
StringRef Name;
|
|
if (Sec->Name[7] == 0)
|
|
// Null terminated, let ::strlen figure out the length.
|
|
Name = Sec->Name;
|
|
else
|
|
// Not null terminated, use all 8 bytes.
|
|
Name = StringRef(Sec->Name, 8);
|
|
|
|
// Check for string table entry. First byte is '/'.
|
|
if (Name[0] == '/') {
|
|
uint32_t Offset;
|
|
if (Name.substr(1).getAsInteger(10, Offset))
|
|
return object_error::parse_failed;
|
|
if (error_code ec = getString(Offset, Name))
|
|
return ec;
|
|
}
|
|
|
|
Res = Name;
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getSectionContents(const coff_section *Sec,
|
|
ArrayRef<uint8_t> &Res) const {
|
|
// The only thing that we need to verify is that the contents is contained
|
|
// within the file bounds. We don't need to make sure it doesn't cover other
|
|
// data, as there's nothing that says that is not allowed.
|
|
uintptr_t ConStart = uintptr_t(base()) + Sec->PointerToRawData;
|
|
uintptr_t ConEnd = ConStart + Sec->SizeOfRawData;
|
|
if (ConEnd > uintptr_t(Data->getBufferEnd()))
|
|
return object_error::parse_failed;
|
|
Res = ArrayRef<uint8_t>(reinterpret_cast<const unsigned char*>(ConStart),
|
|
Sec->SizeOfRawData);
|
|
return object_error::success;
|
|
}
|
|
|
|
const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
|
|
return reinterpret_cast<const coff_relocation*>(Rel.p);
|
|
}
|
|
error_code COFFObjectFile::getRelocationNext(DataRefImpl Rel,
|
|
RelocationRef &Res) const {
|
|
Rel.p = reinterpret_cast<uintptr_t>(
|
|
reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
|
|
Res = RelocationRef(Rel, this);
|
|
return object_error::success;
|
|
}
|
|
error_code COFFObjectFile::getRelocationAddress(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
report_fatal_error("getRelocationAddress not implemented in COFFObjectFile");
|
|
}
|
|
error_code COFFObjectFile::getRelocationOffset(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
Res = toRel(Rel)->VirtualAddress;
|
|
return object_error::success;
|
|
}
|
|
error_code COFFObjectFile::getRelocationSymbol(DataRefImpl Rel,
|
|
SymbolRef &Res) const {
|
|
const coff_relocation* R = toRel(Rel);
|
|
DataRefImpl Symb;
|
|
Symb.p = reinterpret_cast<uintptr_t>(SymbolTable + R->SymbolTableIndex);
|
|
Res = SymbolRef(Symb, this);
|
|
return object_error::success;
|
|
}
|
|
error_code COFFObjectFile::getRelocationType(DataRefImpl Rel,
|
|
uint64_t &Res) const {
|
|
const coff_relocation* R = toRel(Rel);
|
|
Res = R->Type;
|
|
return object_error::success;
|
|
}
|
|
|
|
const coff_section *COFFObjectFile::getCOFFSection(section_iterator &It) const {
|
|
return toSec(It->getRawDataRefImpl());
|
|
}
|
|
|
|
const coff_symbol *COFFObjectFile::getCOFFSymbol(symbol_iterator &It) const {
|
|
return toSymb(It->getRawDataRefImpl());
|
|
}
|
|
|
|
const coff_relocation *COFFObjectFile::getCOFFRelocation(
|
|
relocation_iterator &It) const {
|
|
return toRel(It->getRawDataRefImpl());
|
|
}
|
|
|
|
|
|
#define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(enum) \
|
|
case COFF::enum: res = #enum; break;
|
|
|
|
error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
const coff_relocation *reloc = toRel(Rel);
|
|
StringRef res;
|
|
switch (Header->Machine) {
|
|
case COFF::IMAGE_FILE_MACHINE_AMD64:
|
|
switch (reloc->Type) {
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR64);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ADDR32NB);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_1);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_2);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_3);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_4);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_REL32_5);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECTION);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SECREL7);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_TOKEN);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SREL32);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_PAIR);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_SSPAN32);
|
|
default:
|
|
res = "Unknown";
|
|
}
|
|
break;
|
|
case COFF::IMAGE_FILE_MACHINE_I386:
|
|
switch (reloc->Type) {
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_ABSOLUTE);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR16);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL16);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_DIR32NB);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SEG12);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECTION);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_TOKEN);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_SECREL7);
|
|
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_I386_REL32);
|
|
default:
|
|
res = "Unknown";
|
|
}
|
|
break;
|
|
default:
|
|
res = "Unknown";
|
|
}
|
|
Result.append(res.begin(), res.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
#undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
|
|
|
|
error_code COFFObjectFile::getRelocationAdditionalInfo(DataRefImpl Rel,
|
|
int64_t &Res) const {
|
|
Res = 0;
|
|
return object_error::success;
|
|
}
|
|
error_code COFFObjectFile::getRelocationValueString(DataRefImpl Rel,
|
|
SmallVectorImpl<char> &Result) const {
|
|
const coff_relocation *reloc = toRel(Rel);
|
|
const coff_symbol *symb = 0;
|
|
if (error_code ec = getSymbol(reloc->SymbolTableIndex, symb)) return ec;
|
|
DataRefImpl sym;
|
|
sym.p = reinterpret_cast<uintptr_t>(symb);
|
|
StringRef symname;
|
|
if (error_code ec = getSymbolName(sym, symname)) return ec;
|
|
Result.append(symname.begin(), symname.end());
|
|
return object_error::success;
|
|
}
|
|
|
|
error_code COFFObjectFile::getLibraryNext(DataRefImpl LibData,
|
|
LibraryRef &Result) const {
|
|
report_fatal_error("getLibraryNext not implemented in COFFObjectFile");
|
|
}
|
|
|
|
error_code COFFObjectFile::getLibraryPath(DataRefImpl LibData,
|
|
StringRef &Result) const {
|
|
report_fatal_error("getLibraryPath not implemented in COFFObjectFile");
|
|
}
|
|
|
|
namespace llvm {
|
|
|
|
ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
|
|
error_code ec;
|
|
return new COFFObjectFile(Object, ec);
|
|
}
|
|
|
|
} // end namespace llvm
|