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readobj: Dump PE/COFF optional records.

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These records are mandatory for executables and are used by the loader.

Reviewers: rafael

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D939

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183852 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rui Ueyama 2013-06-12 19:10:33 +00:00
parent 100fbdd06b
commit 4bf771b4e6
8 changed files with 201 additions and 52 deletions
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5
include/llvm/Object/COFF.h
View File

@ -188,7 +188,8 @@ struct coff_aux_section_definition {
class COFFObjectFile : public ObjectFile {
private:
const coff_file_header *Header;
const coff_file_header *COFFHeader;
const pe32_header *PE32Header;
const coff_section *SectionTable;
const coff_symbol *SymbolTable;
const char *StringTable;
@ -272,6 +273,8 @@ public:
virtual StringRef getLoadName() const;
error_code getHeader(const coff_file_header *&Res) const;
error_code getCOFFHeader(const coff_file_header *&Res) const;
error_code getPE32Header(const pe32_header *&Res) const;
error_code getSection(int32_t index, const coff_section *&Res) const;
error_code getSymbol(uint32_t index, const coff_symbol *&Res) const;
template <typename T>

6
lib/Object/Binary.cpp
View File

@ -84,8 +84,10 @@ error_code object::createBinary(MemoryBuffer *Source,
}
case sys::fs::file_magic::coff_object:
case sys::fs::file_magic::pecoff_executable: {
OwningPtr<Binary> ret(new COFFObjectFile(scopedSource.take(), ec));
if (ec) return ec;
OwningPtr<Binary> ret(
ObjectFile::createCOFFObjectFile(scopedSource.take()));
if (!ret)
return object_error::invalid_file_type;
Result.swap(ret);
return object_error::success;
}

99
lib/Object/COFFObjectFile.cpp
View File

@ -58,12 +58,12 @@ const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
# ifndef NDEBUG
// Verify that the symbol points to a valid entry in the symbol table.
uintptr_t offset = uintptr_t(addr) - uintptr_t(base());
if (offset < Header->PointerToSymbolTable
|| offset >= Header->PointerToSymbolTable
+ (Header->NumberOfSymbols * sizeof(coff_symbol)))
if (offset < COFFHeader->PointerToSymbolTable
|| offset >= COFFHeader->PointerToSymbolTable
+ (COFFHeader->NumberOfSymbols * sizeof(coff_symbol)))
report_fatal_error("Symbol was outside of symbol table.");
assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
assert((offset - COFFHeader->PointerToSymbolTable) % sizeof(coff_symbol)
== 0 && "Symbol did not point to the beginning of a symbol");
# endif
@ -76,7 +76,7 @@ const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
# ifndef NDEBUG
// Verify that the section points to a valid entry in the section table.
if (addr < SectionTable
|| addr >= (SectionTable + Header->NumberOfSections))
|| addr >= (SectionTable + COFFHeader->NumberOfSections))
report_fatal_error("Section was outside of section table.");
uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
@ -430,7 +430,8 @@ relocation_iterator COFFObjectFile::getSectionRelEnd(DataRefImpl Sec) const {
COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
: ObjectFile(Binary::ID_COFF, Object)
, Header(0)
, COFFHeader(0)
, PE32Header(0)
, SectionTable(0)
, SymbolTable(0)
, StringTable(0)
@ -438,49 +439,64 @@ COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
// Check that we at least have enough room for a header.
if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
// The actual starting location of the COFF header in the file. This can be
// non-zero in PE/COFF files.
uint64_t HeaderStart = 0;
// The current location in the file where we are looking at.
uint64_t CurPtr = 0;
// PE header is optional and is present only in executables. If it exists,
// it is placed right after COFF header.
bool hasPEHeader = false;
// Check if this is a PE/COFF file.
if (base()[0] == 0x4d && base()[1] == 0x5a) {
// PE/COFF, seek through MS-DOS compatibility stub and 4-byte
// PE signature to find 'normal' COFF header.
if (!checkSize(Data, ec, 0x3c + 8)) return;
HeaderStart = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
// Check the PE header. ("PE\0\0")
if (std::memcmp(base() + HeaderStart, "PE\0\0", 4) != 0) {
CurPtr = *reinterpret_cast<const ulittle16_t *>(base() + 0x3c);
// Check the PE magic bytes. ("PE\0\0")
if (std::memcmp(base() + CurPtr, "PE\0\0", 4) != 0) {
ec = object_error::parse_failed;
return;
}
HeaderStart += 4; // Skip the PE Header.
CurPtr += 4; // Skip the PE magic bytes.
hasPEHeader = true;
}
Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
COFFHeader = reinterpret_cast<const coff_file_header *>(base() + CurPtr);
if (!checkAddr(Data, ec, uintptr_t(COFFHeader), sizeof(coff_file_header)))
return;
CurPtr += sizeof(coff_file_header);
if (hasPEHeader) {
PE32Header = reinterpret_cast<const pe32_header *>(base() + CurPtr);
if (!checkAddr(Data, ec, uintptr_t(PE32Header), sizeof(pe32_header)))
return;
// We only support PE32. If this is PE32 (not PE32+), the magic byte
// should be 0x10b. If this is not PE32, continue as if there's no PE
// header in this file.
if (PE32Header->Magic != 0x10b)
PE32Header = 0;
// There may be optional data directory after PE header. Skip them.
CurPtr += COFFHeader->SizeOfOptionalHeader;
}
SectionTable =
reinterpret_cast<const coff_section *>( base()
+ HeaderStart
+ sizeof(coff_file_header)
+ Header->SizeOfOptionalHeader);
reinterpret_cast<const coff_section *>(base() + CurPtr);
if (!checkAddr(Data, ec, uintptr_t(SectionTable),
Header->NumberOfSections * sizeof(coff_section)))
COFFHeader->NumberOfSections * sizeof(coff_section)))
return;
if (Header->PointerToSymbolTable != 0) {
if (COFFHeader->PointerToSymbolTable != 0) {
SymbolTable =
reinterpret_cast<const coff_symbol *>(base()
+ Header->PointerToSymbolTable);
+ COFFHeader->PointerToSymbolTable);
if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
Header->NumberOfSymbols * sizeof(coff_symbol)))
COFFHeader->NumberOfSymbols * sizeof(coff_symbol)))
return;
// Find string table.
StringTable = reinterpret_cast<const char *>(base())
+ Header->PointerToSymbolTable
+ Header->NumberOfSymbols * sizeof(coff_symbol);
+ COFFHeader->PointerToSymbolTable
+ COFFHeader->NumberOfSymbols * sizeof(coff_symbol);
if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
return;
@ -545,7 +561,7 @@ section_iterator COFFObjectFile::begin_sections() const {
section_iterator COFFObjectFile::end_sections() const {
DataRefImpl ret;
ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
ret.p = reinterpret_cast<intptr_t>(SectionTable + COFFHeader->NumberOfSections);
return section_iterator(SectionRef(ret, this));
}
@ -554,7 +570,7 @@ uint8_t COFFObjectFile::getBytesInAddress() const {
}
StringRef COFFObjectFile::getFileFormatName() const {
switch(Header->Machine) {
switch(COFFHeader->Machine) {
case COFF::IMAGE_FILE_MACHINE_I386:
return "COFF-i386";
case COFF::IMAGE_FILE_MACHINE_AMD64:
@ -565,7 +581,7 @@ StringRef COFFObjectFile::getFileFormatName() const {
}
unsigned COFFObjectFile::getArch() const {
switch(Header->Machine) {
switch(COFFHeader->Machine) {
case COFF::IMAGE_FILE_MACHINE_I386:
return Triple::x86;
case COFF::IMAGE_FILE_MACHINE_AMD64:
@ -575,8 +591,19 @@ unsigned COFFObjectFile::getArch() const {
}
}
// This method is kept here because lld uses this. As soon as we make
// lld to use getCOFFHeader, this method will be removed.
error_code COFFObjectFile::getHeader(const coff_file_header *&Res) const {
Res = Header;
return getCOFFHeader(Res);
}
error_code COFFObjectFile::getCOFFHeader(const coff_file_header *&Res) const {
Res = COFFHeader;
return object_error::success;
}
error_code COFFObjectFile::getPE32Header(const pe32_header *&Res) const {
Res = PE32Header;
return object_error::success;
}
@ -587,7 +614,7 @@ error_code COFFObjectFile::getSection(int32_t index,
index == COFF::IMAGE_SYM_ABSOLUTE ||
index == COFF::IMAGE_SYM_DEBUG)
Result = NULL;
else if (index > 0 && index <= Header->NumberOfSections)
else if (index > 0 && index <= COFFHeader->NumberOfSections)
// We already verified the section table data, so no need to check again.
Result = SectionTable + (index - 1);
else
@ -608,7 +635,7 @@ error_code COFFObjectFile::getString(uint32_t offset,
error_code COFFObjectFile::getSymbol(uint32_t index,
const coff_symbol *&Result) const {
if (index < Header->NumberOfSymbols)
if (index < COFFHeader->NumberOfSymbols)
Result = SymbolTable + index;
else
return object_error::parse_failed;
@ -644,12 +671,12 @@ ArrayRef<uint8_t> COFFObjectFile::getSymbolAuxData(
# 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)))
if (offset < COFFHeader->PointerToSymbolTable
|| offset >= COFFHeader->PointerToSymbolTable
+ (COFFHeader->NumberOfSymbols * sizeof(coff_symbol)))
report_fatal_error("Aux Symbol data was outside of symbol table.");
assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
assert((offset - COFFHeader->PointerToSymbolTable) % sizeof(coff_symbol)
== 0 && "Aux Symbol data did not point to the beginning of a symbol");
# endif
}
@ -746,7 +773,7 @@ error_code COFFObjectFile::getRelocationTypeName(DataRefImpl Rel,
SmallVectorImpl<char> &Result) const {
const coff_relocation *reloc = toRel(Rel);
StringRef res;
switch (Header->Machine) {
switch (COFFHeader->Machine) {
case COFF::IMAGE_FILE_MACHINE_AMD64:
switch (reloc->Type) {
LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_AMD64_ABSOLUTE);

BIN
test/tools/llvm-readobj/Inputs/trivial.exe.coff-i386 Normal file
View File

Binary file not shown.

51
test/tools/llvm-readobj/file-headers.test
View File

@ -2,6 +2,8 @@ RUN: llvm-readobj -h %p/Inputs/trivial.obj.coff-i386 \
RUN: | FileCheck %s -check-prefix COFF32
RUN: llvm-readobj -h %p/Inputs/trivial.obj.coff-x86-64 \
RUN: | FileCheck %s -check-prefix COFF64
RUN: llvm-readobj -h %p/Inputs/trivial.exe.coff-i386 \
RUN: | FileCheck %s -check-prefix PE32
RUN: llvm-readobj -h %p/Inputs/trivial.obj.elf-i386 \
RUN: | FileCheck %s -check-prefix ELF32
RUN: llvm-readobj -h %p/Inputs/trivial.obj.elf-x86-64 \
@ -98,3 +100,52 @@ ELF64-NEXT: SectionHeaderEntrySize: 64
ELF64-NEXT: SectionHeaderCount: 10
ELF64-NEXT: StringTableSectionIndex: 7
ELF64-NEXT: }
PE32: File: {{(.*[/\\])?}}trivial.exe.coff-i386
PE32-NEXT: Format: COFF-i386
PE32-NEXT: Arch: i386
PE32-NEXT: AddressSize: 32bit
PE32-NEXT: ImageFileHeader {
PE32-NEXT: Machine: IMAGE_FILE_MACHINE_I386 (0x14C)
PE32-NEXT: SectionCount: 1
PE32-NEXT: TimeDateStamp: 2013-05-24 21:24:34 (0x519FDA92)
PE32-NEXT: PointerToSymbolTable: 0x0
PE32-NEXT: SymbolCount: 0
PE32-NEXT: OptionalHeaderSize: 224
PE32-NEXT: Characteristics [ (0x102)
PE32-NEXT: IMAGE_FILE_32BIT_MACHINE (0x100)
PE32-NEXT: IMAGE_FILE_EXECUTABLE_IMAGE (0x2)
PE32-NEXT: ]
PE32-NEXT: }
PE32-NEXT: ImageOptionalHeader {
PE32-NEXT: MajorLinkerVersion: 10
PE32-NEXT: MinorLinkerVersion: 0
PE32-NEXT: SizeOfCode: 512
PE32-NEXT: SizeOfInitializedData: 0
PE32-NEXT: SizeOfUninitializedData: 0
PE32-NEXT: AddressOfEntryPoint: 0x1000
PE32-NEXT: BaseOfCode: 0x1000
PE32-NEXT: BaseOfData: 0x2000
PE32-NEXT: ImageBase: 0x400000
PE32-NEXT: SectionAlignment: 4096
PE32-NEXT: FileAlignment: 512
PE32-NEXT: MajorOperatingSystemVersion: 5
PE32-NEXT: MinorOperatingSystemVersion: 1
PE32-NEXT: MajorImageVersion: 0
PE32-NEXT: MinorImageVersion: 0
PE32-NEXT: MajorSubsystemVersion: 5
PE32-NEXT: MinorSubsystemVersion: 1
PE32-NEXT: SizeOfImage: 8192
PE32-NEXT: SizeOfHeaders: 512
PE32-NEXT: Subsystem: IMAGE_SUBSYSTEM_WINDOWS_GUI (0x2)
PE32-NEXT: Subsystem [ (0x8140)
PE32-NEXT: IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE (0x40)
PE32-NEXT: IMAGE_DLL_CHARACTERISTICS_NX_COMPAT (0x100)
PE32-NEXT: IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE (0x8000)
PE32-NEXT: ]
PE32-NEXT: SizeOfStackReserve: 1048576
PE32-NEXT: SizeOfStackCommit: 4096
PE32-NEXT: SizeOfHeapReserve: 1048576
PE32-NEXT: SizeOfHeapCommit: 4096
PE32-NEXT: NumberOfRvaAndSize: 16
PE32-NEXT: }

2
tools/llvm-objdump/COFFDump.cpp
View File

@ -229,7 +229,7 @@ static void printCOFFSymbolAddress(llvm::raw_ostream &Out,
void llvm::printCOFFUnwindInfo(const COFFObjectFile *Obj) {
const coff_file_header *Header;
if (error(Obj->getHeader(Header))) return;
if (error(Obj->getCOFFHeader(Header))) return;
if (Header->Machine != COFF::IMAGE_FILE_MACHINE_AMD64) {
errs() << "Unsupported image machine type "

88
tools/llvm-readobj/COFFDumper.cpp
View File

@ -262,6 +262,31 @@ static const EnumEntry<COFF::Characteristics> ImageFileCharacteristics[] = {
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_FILE_BYTES_REVERSED_HI )
};
static const EnumEntry<COFF::WindowsSubsystem> PEWindowsSubsystem[] = {
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_UNKNOWN ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_NATIVE ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_GUI ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_CUI ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_POSIX_CUI ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_WINDOWS_CE_GUI ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_APPLICATION ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_EFI_ROM ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SUBSYSTEM_XBOX ),
};
static const EnumEntry<COFF::DLLCharacteristics> PEDLLCharacteristics[] = {
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_DYNAMIC_BASE ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_FORCE_INTEGRITY ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NX_COMPAT ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_ISOLATION ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_SEH ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_NO_BIND ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_WDM_DRIVER ),
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_DLL_CHARACTERISTICS_TERMINAL_SERVER_AWARE),
};
static const EnumEntry<COFF::SectionCharacteristics>
ImageSectionCharacteristics[] = {
LLVM_READOBJ_ENUM_ENT(COFF, IMAGE_SCN_TYPE_NO_PAD ),
@ -536,26 +561,67 @@ void COFFDumper::cacheRelocations() {
}
void COFFDumper::printFileHeaders() {
const coff_file_header *Header = 0;
if (error(Obj->getHeader(Header)))
// Print COFF header
const coff_file_header *COFFHeader = 0;
if (error(Obj->getCOFFHeader(COFFHeader)))
return;
time_t TDS = Header->TimeDateStamp;
time_t TDS = COFFHeader->TimeDateStamp;
char FormattedTime[20] = { };
strftime(FormattedTime, 20, "%Y-%m-%d %H:%M:%S", gmtime(&TDS));
{
DictScope D(W, "ImageFileHeader");
W.printEnum ("Machine", Header->Machine,
W.printEnum ("Machine", COFFHeader->Machine,
makeArrayRef(ImageFileMachineType));
W.printNumber("SectionCount", Header->NumberOfSections);
W.printHex ("TimeDateStamp", FormattedTime, Header->TimeDateStamp);
W.printHex ("PointerToSymbolTable", Header->PointerToSymbolTable);
W.printNumber("SymbolCount", Header->NumberOfSymbols);
W.printNumber("OptionalHeaderSize", Header->SizeOfOptionalHeader);
W.printFlags ("Characteristics", Header->Characteristics,
W.printNumber("SectionCount", COFFHeader->NumberOfSections);
W.printHex ("TimeDateStamp", FormattedTime, COFFHeader->TimeDateStamp);
W.printHex ("PointerToSymbolTable", COFFHeader->PointerToSymbolTable);
W.printNumber("SymbolCount", COFFHeader->NumberOfSymbols);
W.printNumber("OptionalHeaderSize", COFFHeader->SizeOfOptionalHeader);
W.printFlags ("Characteristics", COFFHeader->Characteristics,
makeArrayRef(ImageFileCharacteristics));
}
// Print PE header. This header does not exist if this is an object file and
// not an executable.
const pe32_header *PEHeader = 0;
if (error(Obj->getPE32Header(PEHeader)))
return;
if (PEHeader) {
DictScope D(W, "ImageOptionalHeader");
W.printNumber("MajorLinkerVersion", PEHeader->MajorLinkerVersion);
W.printNumber("MinorLinkerVersion", PEHeader->MinorLinkerVersion);
W.printNumber("SizeOfCode", PEHeader->SizeOfCode);
W.printNumber("SizeOfInitializedData", PEHeader->SizeOfInitializedData);
W.printNumber("SizeOfUninitializedData", PEHeader->SizeOfUninitializedData);
W.printHex ("AddressOfEntryPoint", PEHeader->AddressOfEntryPoint);
W.printHex ("BaseOfCode", PEHeader->BaseOfCode);
W.printHex ("BaseOfData", PEHeader->BaseOfData);
W.printHex ("ImageBase", PEHeader->ImageBase);
W.printNumber("SectionAlignment", PEHeader->SectionAlignment);
W.printNumber("FileAlignment", PEHeader->FileAlignment);
W.printNumber("MajorOperatingSystemVersion",
PEHeader->MajorOperatingSystemVersion);
W.printNumber("MinorOperatingSystemVersion",
PEHeader->MinorOperatingSystemVersion);
W.printNumber("MajorImageVersion", PEHeader->MajorImageVersion);
W.printNumber("MinorImageVersion", PEHeader->MinorImageVersion);
W.printNumber("MajorSubsystemVersion", PEHeader->MajorSubsystemVersion);
W.printNumber("MinorSubsystemVersion", PEHeader->MinorSubsystemVersion);
W.printNumber("SizeOfImage", PEHeader->SizeOfImage);
W.printNumber("SizeOfHeaders", PEHeader->SizeOfHeaders);
W.printEnum ("Subsystem", PEHeader->Subsystem,
makeArrayRef(PEWindowsSubsystem));
W.printFlags ("Subsystem", PEHeader->DLLCharacteristics,
makeArrayRef(PEDLLCharacteristics));
W.printNumber("SizeOfStackReserve", PEHeader->SizeOfStackReserve);
W.printNumber("SizeOfStackCommit", PEHeader->SizeOfStackCommit);
W.printNumber("SizeOfHeapReserve", PEHeader->SizeOfHeapReserve);
W.printNumber("SizeOfHeapCommit", PEHeader->SizeOfHeapCommit);
W.printNumber("NumberOfRvaAndSize", PEHeader->NumberOfRvaAndSize);
}
}
void COFFDumper::printSections() {
@ -834,7 +900,7 @@ void COFFDumper::printSymbol(symbol_iterator SymI) {
void COFFDumper::printUnwindInfo() {
const coff_file_header *Header;
if (error(Obj->getHeader(Header)))
if (error(Obj->getCOFFHeader(Header)))
return;
ListScope D(W, "UnwindInformation");

2
tools/obj2yaml/coff2yaml.cpp
View File

@ -38,7 +38,7 @@ static void check(error_code ec) {
COFFDumper::COFFDumper(const object::COFFObjectFile &Obj) : Obj(Obj) {
const object::coff_file_header *Header;
check(Obj.getHeader(Header));
check(Obj.getCOFFHeader(Header));
dumpHeader(Header);
dumpSections(Header->NumberOfSections);
dumpSymbols(Header->NumberOfSymbols);