//===----------------------------------------------------------------------===//
#include "llvm/Object/COFF.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/Support/COFF.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cctype>
+#include <limits>
using namespace llvm;
using namespace object;
-namespace {
-using support::ulittle8_t;
using support::ulittle16_t;
using support::ulittle32_t;
+using support::ulittle64_t;
using support::little16_t;
-}
-namespace {
// Returns false if size is greater than the buffer size. And sets ec.
-bool checkSize(const MemoryBuffer *m, error_code &ec, uint64_t size) {
- if (m->getBufferSize() < size) {
- ec = object_error::unexpected_eof;
+static bool checkSize(MemoryBufferRef M, std::error_code &EC, uint64_t Size) {
+ if (M.getBufferSize() < Size) {
+ EC = object_error::unexpected_eof;
return false;
}
return true;
}
-// Returns false if any bytes in [addr, addr + size) fall outsize of m.
-bool checkAddr(const MemoryBuffer *m,
- error_code &ec,
- uintptr_t addr,
- uint64_t size) {
- if (addr + size < addr ||
- addr + size < size ||
- addr + size > uintptr_t(m->getBufferEnd())) {
- ec = object_error::unexpected_eof;
- return false;
+static std::error_code checkOffset(MemoryBufferRef M, uintptr_t Addr,
+ const uint64_t Size) {
+ if (Addr + Size < Addr || Addr + Size < Size ||
+ Addr + Size > uintptr_t(M.getBufferEnd()) ||
+ Addr < uintptr_t(M.getBufferStart())) {
+ return object_error::unexpected_eof;
}
- return true;
+ return std::error_code();
}
+
+// Sets Obj unless any bytes in [addr, addr + size) fall outsize of m.
+// Returns unexpected_eof if error.
+template <typename T>
+static std::error_code getObject(const T *&Obj, MemoryBufferRef M,
+ const void *Ptr,
+ const uint64_t Size = sizeof(T)) {
+ uintptr_t Addr = uintptr_t(Ptr);
+ if (std::error_code EC = checkOffset(M, Addr, Size))
+ return EC;
+ Obj = reinterpret_cast<const T *>(Addr);
+ return std::error_code();
}
-const coff_symbol *COFFObjectFile::toSymb(DataRefImpl Symb) const {
- const coff_symbol *addr = reinterpret_cast<const coff_symbol*>(Symb.p);
+// Decode a string table entry in base 64 (//AAAAAA). Expects \arg Str without
+// prefixed slashes.
+static bool decodeBase64StringEntry(StringRef Str, uint32_t &Result) {
+ assert(Str.size() <= 6 && "String too long, possible overflow.");
+ if (Str.size() > 6)
+ return true;
-# ifndef NDEBUG
+ uint64_t Value = 0;
+ while (!Str.empty()) {
+ unsigned CharVal;
+ if (Str[0] >= 'A' && Str[0] <= 'Z') // 0..25
+ CharVal = Str[0] - 'A';
+ else if (Str[0] >= 'a' && Str[0] <= 'z') // 26..51
+ CharVal = Str[0] - 'a' + 26;
+ else if (Str[0] >= '0' && Str[0] <= '9') // 52..61
+ CharVal = Str[0] - '0' + 52;
+ else if (Str[0] == '+') // 62
+ CharVal = 62;
+ else if (Str[0] == '/') // 63
+ CharVal = 63;
+ else
+ return true;
+
+ Value = (Value * 64) + CharVal;
+ Str = Str.substr(1);
+ }
+
+ if (Value > std::numeric_limits<uint32_t>::max())
+ return true;
+
+ Result = static_cast<uint32_t>(Value);
+ return false;
+}
+
+template <typename coff_symbol_type>
+const coff_symbol_type *COFFObjectFile::toSymb(DataRefImpl Ref) const {
+ const coff_symbol_type *Addr =
+ reinterpret_cast<const coff_symbol_type *>(Ref.p);
+
+ assert(!checkOffset(Data, uintptr_t(Addr), sizeof(*Addr)));
+#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)))
- report_fatal_error("Symbol was outside of symbol table.");
-
- assert((offset - Header->PointerToSymbolTable) % sizeof(coff_symbol)
- == 0 && "Symbol did not point to the beginning of a symbol");
-# endif
+ uintptr_t Offset = uintptr_t(Addr) - uintptr_t(base());
- return addr;
+ assert((Offset - getPointerToSymbolTable()) % sizeof(coff_symbol_type) == 0 &&
+ "Symbol did not point to the beginning of a symbol");
+#endif
+
+ return Addr;
}
-const coff_section *COFFObjectFile::toSec(DataRefImpl Sec) const {
- const coff_section *addr = reinterpret_cast<const coff_section*>(Sec.p);
+const coff_section *COFFObjectFile::toSec(DataRefImpl Ref) const {
+ const coff_section *Addr = reinterpret_cast<const coff_section*>(Ref.p);
# ifndef NDEBUG
// Verify that the section points to a valid entry in the section table.
- if (addr < SectionTable
- || addr >= (SectionTable + Header->NumberOfSections))
+ if (Addr < SectionTable || Addr >= (SectionTable + getNumberOfSections()))
report_fatal_error("Section was outside of section table.");
- uintptr_t offset = uintptr_t(addr) - uintptr_t(SectionTable);
- assert(offset % sizeof(coff_section) == 0 &&
+ uintptr_t Offset = uintptr_t(Addr) - uintptr_t(SectionTable);
+ assert(Offset % sizeof(coff_section) == 0 &&
"Section did not point to the beginning of a section");
# endif
- return addr;
+ return Addr;
}
-error_code COFFObjectFile::getSymbolNext(DataRefImpl Symb,
- SymbolRef &Result) const {
- const coff_symbol *symb = toSymb(Symb);
- symb += 1 + symb->NumberOfAuxSymbols;
- Symb.p = reinterpret_cast<uintptr_t>(symb);
- Result = SymbolRef(Symb, this);
- return object_error::success;
+void COFFObjectFile::moveSymbolNext(DataRefImpl &Ref) const {
+ auto End = reinterpret_cast<uintptr_t>(StringTable);
+ if (SymbolTable16) {
+ const coff_symbol16 *Symb = toSymb<coff_symbol16>(Ref);
+ Symb += 1 + Symb->NumberOfAuxSymbols;
+ Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
+ } else if (SymbolTable32) {
+ const coff_symbol32 *Symb = toSymb<coff_symbol32>(Ref);
+ Symb += 1 + Symb->NumberOfAuxSymbols;
+ Ref.p = std::min(reinterpret_cast<uintptr_t>(Symb), End);
+ } else {
+ llvm_unreachable("no symbol table pointer!");
+ }
}
- error_code COFFObjectFile::getSymbolName(DataRefImpl Symb,
- StringRef &Result) const {
- const coff_symbol *symb = toSymb(Symb);
- // Check for string table entry. First 4 bytes are 0.
- if (symb->Name.Offset.Zeroes == 0) {
- uint32_t Offset = symb->Name.Offset.Offset;
- if (error_code ec = getString(Offset, Result))
- return ec;
- return object_error::success;
- }
+ErrorOr<StringRef> COFFObjectFile::getSymbolName(DataRefImpl Ref) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ StringRef Result;
+ std::error_code EC = getSymbolName(Symb, Result);
+ if (EC)
+ return EC;
+ return Result;
+}
- if (symb->Name.ShortName[7] == 0)
- // Null terminated, let ::strlen figure out the length.
- Result = StringRef(symb->Name.ShortName);
- else
- // Not null terminated, use all 8 bytes.
- Result = StringRef(symb->Name.ShortName, 8);
- return object_error::success;
-}
-
-error_code COFFObjectFile::getSymbolAddress(DataRefImpl Symb,
- uint64_t &Result) const {
- const coff_symbol *symb = toSymb(Symb);
- const coff_section *Section;
- if (error_code ec = getSection(symb->SectionNumber, Section))
- return ec;
- char Type;
- if (error_code ec = getSymbolNMTypeChar(Symb, Type))
- return ec;
- if (Type == 'U' || Type == 'w')
- Result = UnknownAddressOrSize;
- else if (Section)
- Result = Section->VirtualAddress + symb->Value;
- else
- Result = symb->Value;
- return object_error::success;
-}
-
-error_code COFFObjectFile::getSymbolSize(DataRefImpl Symb,
- uint64_t &Result) const {
- // FIXME: Return the correct size. This requires looking at all the symbols
- // in the same section as this symbol, and looking for either the next
- // symbol, or the end of the section.
- const coff_symbol *symb = toSymb(Symb);
- const coff_section *Section;
- if (error_code ec = getSection(symb->SectionNumber, Section))
- return ec;
- char Type;
- if (error_code ec = getSymbolNMTypeChar(Symb, Type))
- return ec;
- if (Type == 'U' || Type == 'w')
- Result = UnknownAddressOrSize;
- else if (Section)
- Result = Section->SizeOfRawData - symb->Value;
- else
- Result = 0;
- return object_error::success;
-}
-
-error_code COFFObjectFile::getSymbolNMTypeChar(DataRefImpl Symb,
- char &Result) const {
- const coff_symbol *symb = toSymb(Symb);
- StringRef name;
- if (error_code ec = getSymbolName(Symb, name))
- return ec;
- char ret = StringSwitch<char>(name)
- .StartsWith(".debug", 'N')
- .StartsWith(".sxdata", 'N')
- .Default('?');
-
- if (ret != '?') {
- Result = ret;
- return object_error::success;
- }
+uint64_t COFFObjectFile::getSymbolValueImpl(DataRefImpl Ref) const {
+ return getCOFFSymbol(Ref).getValue();
+}
+
+ErrorOr<uint64_t> COFFObjectFile::getSymbolAddress(DataRefImpl Ref) const {
+ uint64_t Result = getSymbolValue(Ref);
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ int32_t SectionNumber = Symb.getSectionNumber();
+
+ if (Symb.isAnyUndefined() || Symb.isCommon() ||
+ COFF::isReservedSectionNumber(SectionNumber))
+ return Result;
+
+ const coff_section *Section = nullptr;
+ if (std::error_code EC = getSection(SectionNumber, Section))
+ return EC;
+ Result += Section->VirtualAddress;
+ return Result;
+}
+
+SymbolRef::Type COFFObjectFile::getSymbolType(DataRefImpl Ref) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ int32_t SectionNumber = Symb.getSectionNumber();
+
+ if (Symb.isAnyUndefined())
+ return SymbolRef::ST_Unknown;
+ if (Symb.isFunctionDefinition())
+ return SymbolRef::ST_Function;
+ if (Symb.isCommon())
+ return SymbolRef::ST_Data;
+ if (Symb.isFileRecord())
+ return SymbolRef::ST_File;
+
+ // TODO: perhaps we need a new symbol type ST_Section.
+ if (SectionNumber == COFF::IMAGE_SYM_DEBUG || Symb.isSectionDefinition())
+ return SymbolRef::ST_Debug;
+
+ if (!COFF::isReservedSectionNumber(SectionNumber))
+ return SymbolRef::ST_Data;
+
+ return SymbolRef::ST_Other;
+}
+
+uint32_t COFFObjectFile::getSymbolFlags(DataRefImpl Ref) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ uint32_t Result = SymbolRef::SF_None;
+
+ if (Symb.isExternal() || Symb.isWeakExternal())
+ Result |= SymbolRef::SF_Global;
+
+ if (Symb.isWeakExternal())
+ Result |= SymbolRef::SF_Weak;
+
+ if (Symb.getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE)
+ Result |= SymbolRef::SF_Absolute;
- uint32_t Characteristics = 0;
- if (symb->SectionNumber > 0) {
- const coff_section *Section;
- if (error_code ec = getSection(symb->SectionNumber, Section))
- return ec;
- Characteristics = Section->Characteristics;
+ if (Symb.isFileRecord())
+ Result |= SymbolRef::SF_FormatSpecific;
+
+ if (Symb.isSectionDefinition())
+ Result |= SymbolRef::SF_FormatSpecific;
+
+ if (Symb.isCommon())
+ Result |= SymbolRef::SF_Common;
+
+ if (Symb.isAnyUndefined())
+ Result |= SymbolRef::SF_Undefined;
+
+ return Result;
+}
+
+uint64_t COFFObjectFile::getCommonSymbolSizeImpl(DataRefImpl Ref) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ return Symb.getValue();
+}
+
+std::error_code
+COFFObjectFile::getSymbolSection(DataRefImpl Ref,
+ section_iterator &Result) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Ref);
+ if (COFF::isReservedSectionNumber(Symb.getSectionNumber())) {
+ Result = section_end();
+ } else {
+ const coff_section *Sec = nullptr;
+ if (std::error_code EC = getSection(Symb.getSectionNumber(), Sec))
+ return EC;
+ DataRefImpl Ref;
+ Ref.p = reinterpret_cast<uintptr_t>(Sec);
+ Result = section_iterator(SectionRef(Ref, this));
}
+ return std::error_code();
+}
- switch (symb->SectionNumber) {
- case COFF::IMAGE_SYM_UNDEFINED:
- // Check storage classes.
- if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL) {
- Result = 'w';
- return object_error::success; // Don't do ::toupper.
- } else
- ret = 'u';
- break;
- case COFF::IMAGE_SYM_ABSOLUTE:
- ret = 'a';
- break;
- case COFF::IMAGE_SYM_DEBUG:
- ret = 'n';
- break;
- default:
- // Check section type.
- if (Characteristics & COFF::IMAGE_SCN_CNT_CODE)
- ret = 't';
- else if ( Characteristics & COFF::IMAGE_SCN_MEM_READ
- && ~Characteristics & COFF::IMAGE_SCN_MEM_WRITE) // Read only.
- ret = 'r';
- else if (Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA)
- ret = 'd';
- else if (Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA)
- ret = 'b';
- else if (Characteristics & COFF::IMAGE_SCN_LNK_INFO)
- ret = 'i';
-
- // Check for section symbol.
- else if ( symb->StorageClass == COFF::IMAGE_SYM_CLASS_STATIC
- && symb->Value == 0)
- ret = 's';
+unsigned COFFObjectFile::getSymbolSectionID(SymbolRef Sym) const {
+ COFFSymbolRef Symb = getCOFFSymbol(Sym.getRawDataRefImpl());
+ return Symb.getSectionNumber();
+}
+
+void COFFObjectFile::moveSectionNext(DataRefImpl &Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ Sec += 1;
+ Ref.p = reinterpret_cast<uintptr_t>(Sec);
+}
+
+std::error_code COFFObjectFile::getSectionName(DataRefImpl Ref,
+ StringRef &Result) const {
+ const coff_section *Sec = toSec(Ref);
+ return getSectionName(Sec, Result);
+}
+
+uint64_t COFFObjectFile::getSectionAddress(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ return Sec->VirtualAddress;
+}
+
+uint64_t COFFObjectFile::getSectionSize(DataRefImpl Ref) const {
+ return getSectionSize(toSec(Ref));
+}
+
+std::error_code COFFObjectFile::getSectionContents(DataRefImpl Ref,
+ StringRef &Result) const {
+ const coff_section *Sec = toSec(Ref);
+ ArrayRef<uint8_t> Res;
+ std::error_code EC = getSectionContents(Sec, Res);
+ Result = StringRef(reinterpret_cast<const char*>(Res.data()), Res.size());
+ return EC;
+}
+
+uint64_t COFFObjectFile::getSectionAlignment(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ return uint64_t(1) << (((Sec->Characteristics & 0x00F00000) >> 20) - 1);
+}
+
+bool COFFObjectFile::isSectionText(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ return Sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
+}
+
+bool COFFObjectFile::isSectionData(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ return Sec->Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA;
+}
+
+bool COFFObjectFile::isSectionBSS(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ const uint32_t BssFlags = COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE;
+ return (Sec->Characteristics & BssFlags) == BssFlags;
+}
+
+unsigned COFFObjectFile::getSectionID(SectionRef Sec) const {
+ uintptr_t Offset =
+ uintptr_t(Sec.getRawDataRefImpl().p) - uintptr_t(SectionTable);
+ assert((Offset % sizeof(coff_section)) == 0);
+ return (Offset / sizeof(coff_section)) + 1;
+}
+
+bool COFFObjectFile::isSectionVirtual(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ // In COFF, a virtual section won't have any in-file
+ // content, so the file pointer to the content will be zero.
+ return Sec->PointerToRawData == 0;
+}
+
+static uint32_t getNumberOfRelocations(const coff_section *Sec,
+ MemoryBufferRef M, const uint8_t *base) {
+ // The field for the number of relocations in COFF section table is only
+ // 16-bit wide. If a section has more than 65535 relocations, 0xFFFF is set to
+ // NumberOfRelocations field, and the actual relocation count is stored in the
+ // VirtualAddress field in the first relocation entry.
+ if (Sec->hasExtendedRelocations()) {
+ const coff_relocation *FirstReloc;
+ if (getObject(FirstReloc, M, reinterpret_cast<const coff_relocation*>(
+ base + Sec->PointerToRelocations)))
+ return 0;
+ // -1 to exclude this first relocation entry.
+ return FirstReloc->VirtualAddress - 1;
}
+ return Sec->NumberOfRelocations;
+}
- if (symb->StorageClass == COFF::IMAGE_SYM_CLASS_EXTERNAL)
- ret = ::toupper(ret);
+static const coff_relocation *
+getFirstReloc(const coff_section *Sec, MemoryBufferRef M, const uint8_t *Base) {
+ uint64_t NumRelocs = getNumberOfRelocations(Sec, M, Base);
+ if (!NumRelocs)
+ return nullptr;
+ auto begin = reinterpret_cast<const coff_relocation *>(
+ Base + Sec->PointerToRelocations);
+ if (Sec->hasExtendedRelocations()) {
+ // Skip the first relocation entry repurposed to store the number of
+ // relocations.
+ begin++;
+ }
+ if (checkOffset(M, uintptr_t(begin), sizeof(coff_relocation) * NumRelocs))
+ return nullptr;
+ return begin;
+}
- Result = ret;
- return object_error::success;
+relocation_iterator COFFObjectFile::section_rel_begin(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ const coff_relocation *begin = getFirstReloc(Sec, Data, base());
+ if (begin && Sec->VirtualAddress != 0)
+ report_fatal_error("Sections with relocations should have an address of 0");
+ DataRefImpl Ret;
+ Ret.p = reinterpret_cast<uintptr_t>(begin);
+ return relocation_iterator(RelocationRef(Ret, this));
}
-error_code COFFObjectFile::isSymbolInternal(DataRefImpl Symb,
- bool &Result) const {
- Result = false;
- return object_error::success;
+relocation_iterator COFFObjectFile::section_rel_end(DataRefImpl Ref) const {
+ const coff_section *Sec = toSec(Ref);
+ const coff_relocation *I = getFirstReloc(Sec, Data, base());
+ if (I)
+ I += getNumberOfRelocations(Sec, Data, base());
+ DataRefImpl Ret;
+ Ret.p = reinterpret_cast<uintptr_t>(I);
+ return relocation_iterator(RelocationRef(Ret, this));
}
-error_code COFFObjectFile::getSectionNext(DataRefImpl Sec,
- SectionRef &Result) const {
- const coff_section *sec = toSec(Sec);
- sec += 1;
- Sec.p = reinterpret_cast<uintptr_t>(sec);
- Result = SectionRef(Sec, this);
- return object_error::success;
+// Initialize the pointer to the symbol table.
+std::error_code COFFObjectFile::initSymbolTablePtr() {
+ if (COFFHeader)
+ if (std::error_code EC = getObject(
+ SymbolTable16, Data, base() + getPointerToSymbolTable(),
+ (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
+ return EC;
+
+ if (COFFBigObjHeader)
+ if (std::error_code EC = getObject(
+ SymbolTable32, Data, base() + getPointerToSymbolTable(),
+ (uint64_t)getNumberOfSymbols() * getSymbolTableEntrySize()))
+ return EC;
+
+ // Find string table. The first four byte of the string table contains the
+ // total size of the string table, including the size field itself. If the
+ // string table is empty, the value of the first four byte would be 4.
+ uint32_t StringTableOffset = getPointerToSymbolTable() +
+ getNumberOfSymbols() * getSymbolTableEntrySize();
+ const uint8_t *StringTableAddr = base() + StringTableOffset;
+ const ulittle32_t *StringTableSizePtr;
+ if (std::error_code EC = getObject(StringTableSizePtr, Data, StringTableAddr))
+ return EC;
+ StringTableSize = *StringTableSizePtr;
+ if (std::error_code EC =
+ getObject(StringTable, Data, StringTableAddr, StringTableSize))
+ return EC;
+
+ // Treat table sizes < 4 as empty because contrary to the PECOFF spec, some
+ // tools like cvtres write a size of 0 for an empty table instead of 4.
+ if (StringTableSize < 4)
+ StringTableSize = 4;
+
+ // Check that the string table is null terminated if has any in it.
+ if (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)
+ return object_error::parse_failed;
+ return std::error_code();
}
-error_code COFFObjectFile::getSectionName(DataRefImpl Sec,
- StringRef &Result) const {
- const coff_section *sec = toSec(Sec);
- 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);
+// Returns the file offset for the given VA.
+std::error_code COFFObjectFile::getVaPtr(uint64_t Addr, uintptr_t &Res) const {
+ uint64_t ImageBase = PE32Header ? (uint64_t)PE32Header->ImageBase
+ : (uint64_t)PE32PlusHeader->ImageBase;
+ uint64_t Rva = Addr - ImageBase;
+ assert(Rva <= UINT32_MAX);
+ return getRvaPtr((uint32_t)Rva, Res);
+}
- // Check for string table entry. First byte is '/'.
- if (name[0] == '/') {
- uint32_t Offset;
- name.substr(1).getAsInteger(10, Offset);
- if (error_code ec = getString(Offset, name))
- return ec;
+// Returns the file offset for the given RVA.
+std::error_code COFFObjectFile::getRvaPtr(uint32_t Addr, uintptr_t &Res) const {
+ for (const SectionRef &S : sections()) {
+ const coff_section *Section = getCOFFSection(S);
+ uint32_t SectionStart = Section->VirtualAddress;
+ uint32_t SectionEnd = Section->VirtualAddress + Section->VirtualSize;
+ if (SectionStart <= Addr && Addr < SectionEnd) {
+ uint32_t Offset = Addr - SectionStart;
+ Res = uintptr_t(base()) + Section->PointerToRawData + Offset;
+ return std::error_code();
+ }
}
+ return object_error::parse_failed;
+}
- Result = name;
- return object_error::success;
+// Returns hint and name fields, assuming \p Rva is pointing to a Hint/Name
+// table entry.
+std::error_code COFFObjectFile::getHintName(uint32_t Rva, uint16_t &Hint,
+ StringRef &Name) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = getRvaPtr(Rva, IntPtr))
+ return EC;
+ const uint8_t *Ptr = reinterpret_cast<const uint8_t *>(IntPtr);
+ Hint = *reinterpret_cast<const ulittle16_t *>(Ptr);
+ Name = StringRef(reinterpret_cast<const char *>(Ptr + 2));
+ return std::error_code();
}
-error_code COFFObjectFile::getSectionAddress(DataRefImpl Sec,
- uint64_t &Result) const {
- const coff_section *sec = toSec(Sec);
- Result = sec->VirtualAddress;
- return object_error::success;
+// Find the import table.
+std::error_code COFFObjectFile::initImportTablePtr() {
+ // First, we get the RVA of the import table. If the file lacks a pointer to
+ // the import table, do nothing.
+ const data_directory *DataEntry;
+ if (getDataDirectory(COFF::IMPORT_TABLE, DataEntry))
+ return std::error_code();
+
+ // Do nothing if the pointer to import table is NULL.
+ if (DataEntry->RelativeVirtualAddress == 0)
+ return std::error_code();
+
+ uint32_t ImportTableRva = DataEntry->RelativeVirtualAddress;
+ // -1 because the last entry is the null entry.
+ NumberOfImportDirectory = DataEntry->Size /
+ sizeof(import_directory_table_entry) - 1;
+
+ // Find the section that contains the RVA. This is needed because the RVA is
+ // the import table's memory address which is different from its file offset.
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = getRvaPtr(ImportTableRva, IntPtr))
+ return EC;
+ ImportDirectory = reinterpret_cast<
+ const import_directory_table_entry *>(IntPtr);
+ return std::error_code();
}
-error_code COFFObjectFile::getSectionSize(DataRefImpl Sec,
- uint64_t &Result) const {
- const coff_section *sec = toSec(Sec);
- Result = sec->SizeOfRawData;
- return object_error::success;
+// Initializes DelayImportDirectory and NumberOfDelayImportDirectory.
+std::error_code COFFObjectFile::initDelayImportTablePtr() {
+ const data_directory *DataEntry;
+ if (getDataDirectory(COFF::DELAY_IMPORT_DESCRIPTOR, DataEntry))
+ return std::error_code();
+ if (DataEntry->RelativeVirtualAddress == 0)
+ return std::error_code();
+
+ uint32_t RVA = DataEntry->RelativeVirtualAddress;
+ NumberOfDelayImportDirectory = DataEntry->Size /
+ sizeof(delay_import_directory_table_entry) - 1;
+
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = getRvaPtr(RVA, IntPtr))
+ return EC;
+ DelayImportDirectory = reinterpret_cast<
+ const delay_import_directory_table_entry *>(IntPtr);
+ return std::error_code();
}
-error_code COFFObjectFile::getSectionContents(DataRefImpl Sec,
- StringRef &Result) const {
- const coff_section *sec = toSec(Sec);
- // 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 con_start = uintptr_t(base()) + sec->PointerToRawData;
- uintptr_t con_end = con_start + sec->SizeOfRawData;
- if (con_end >= uintptr_t(Data->getBufferEnd()))
- return object_error::parse_failed;
- Result = StringRef(reinterpret_cast<const char*>(con_start),
- sec->SizeOfRawData);
- return object_error::success;
+// Find the export table.
+std::error_code COFFObjectFile::initExportTablePtr() {
+ // First, we get the RVA of the export table. If the file lacks a pointer to
+ // the export table, do nothing.
+ const data_directory *DataEntry;
+ if (getDataDirectory(COFF::EXPORT_TABLE, DataEntry))
+ return std::error_code();
+
+ // Do nothing if the pointer to export table is NULL.
+ if (DataEntry->RelativeVirtualAddress == 0)
+ return std::error_code();
+
+ uint32_t ExportTableRva = DataEntry->RelativeVirtualAddress;
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = getRvaPtr(ExportTableRva, IntPtr))
+ return EC;
+ ExportDirectory =
+ reinterpret_cast<const export_directory_table_entry *>(IntPtr);
+ return std::error_code();
}
-error_code COFFObjectFile::isSectionText(DataRefImpl Sec,
- bool &Result) const {
- const coff_section *sec = toSec(Sec);
- Result = sec->Characteristics & COFF::IMAGE_SCN_CNT_CODE;
- return object_error::success;
+std::error_code COFFObjectFile::initBaseRelocPtr() {
+ const data_directory *DataEntry;
+ if (getDataDirectory(COFF::BASE_RELOCATION_TABLE, DataEntry))
+ return std::error_code();
+ if (DataEntry->RelativeVirtualAddress == 0)
+ return std::error_code();
+
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = getRvaPtr(DataEntry->RelativeVirtualAddress, IntPtr))
+ return EC;
+ BaseRelocHeader = reinterpret_cast<const coff_base_reloc_block_header *>(
+ IntPtr);
+ BaseRelocEnd = reinterpret_cast<coff_base_reloc_block_header *>(
+ IntPtr + DataEntry->Size);
+ return std::error_code();
}
-COFFObjectFile::COFFObjectFile(MemoryBuffer *Object, error_code &ec)
- : ObjectFile(Binary::isCOFF, Object, ec) {
+COFFObjectFile::COFFObjectFile(MemoryBufferRef Object, std::error_code &EC)
+ : ObjectFile(Binary::ID_COFF, Object), COFFHeader(nullptr),
+ COFFBigObjHeader(nullptr), PE32Header(nullptr), PE32PlusHeader(nullptr),
+ DataDirectory(nullptr), SectionTable(nullptr), SymbolTable16(nullptr),
+ SymbolTable32(nullptr), StringTable(nullptr), StringTableSize(0),
+ ImportDirectory(nullptr), NumberOfImportDirectory(0),
+ DelayImportDirectory(nullptr), NumberOfDelayImportDirectory(0),
+ ExportDirectory(nullptr), BaseRelocHeader(nullptr),
+ BaseRelocEnd(nullptr) {
// Check that we at least have enough room for a header.
- if (!checkSize(Data, ec, sizeof(coff_file_header))) return;
+ 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) {
+ if (checkSize(Data, EC, sizeof(dos_header) + sizeof(COFF::PEMagic))) {
// 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 ulittle32_t *>(base() + 0x3c);
- // Check the PE header. ("PE\0\0")
- if (StringRef(reinterpret_cast<const char *>(base() + HeaderStart), 4)
- != "PE\0\0") {
- ec = object_error::parse_failed;
- return;
+ const auto *DH = reinterpret_cast<const dos_header *>(base());
+ if (DH->Magic[0] == 'M' && DH->Magic[1] == 'Z') {
+ CurPtr = DH->AddressOfNewExeHeader;
+ // Check the PE magic bytes. ("PE\0\0")
+ if (memcmp(base() + CurPtr, COFF::PEMagic, sizeof(COFF::PEMagic)) != 0) {
+ EC = object_error::parse_failed;
+ return;
+ }
+ CurPtr += sizeof(COFF::PEMagic); // Skip the PE magic bytes.
+ HasPEHeader = true;
}
- HeaderStart += 4; // Skip the PE Header.
}
- Header = reinterpret_cast<const coff_file_header *>(base() + HeaderStart);
- if (!checkAddr(Data, ec, uintptr_t(Header), sizeof(coff_file_header)))
- return;
-
- SectionTable =
- reinterpret_cast<const coff_section *>( base()
- + HeaderStart
- + sizeof(coff_file_header)
- + Header->SizeOfOptionalHeader);
- if (!checkAddr(Data, ec, uintptr_t(SectionTable),
- Header->NumberOfSections * sizeof(coff_section)))
+ if ((EC = getObject(COFFHeader, Data, base() + CurPtr)))
return;
- SymbolTable =
- reinterpret_cast<const coff_symbol *>(base()
- + Header->PointerToSymbolTable);
- if (!checkAddr(Data, ec, uintptr_t(SymbolTable),
- Header->NumberOfSymbols * sizeof(coff_symbol)))
+ // It might be a bigobj file, let's check. Note that COFF bigobj and COFF
+ // import libraries share a common prefix but bigobj is more restrictive.
+ if (!HasPEHeader && COFFHeader->Machine == COFF::IMAGE_FILE_MACHINE_UNKNOWN &&
+ COFFHeader->NumberOfSections == uint16_t(0xffff) &&
+ checkSize(Data, EC, sizeof(coff_bigobj_file_header))) {
+ if ((EC = getObject(COFFBigObjHeader, Data, base() + CurPtr)))
+ return;
+
+ // Verify that we are dealing with bigobj.
+ if (COFFBigObjHeader->Version >= COFF::BigObjHeader::MinBigObjectVersion &&
+ std::memcmp(COFFBigObjHeader->UUID, COFF::BigObjMagic,
+ sizeof(COFF::BigObjMagic)) == 0) {
+ COFFHeader = nullptr;
+ CurPtr += sizeof(coff_bigobj_file_header);
+ } else {
+ // It's not a bigobj.
+ COFFBigObjHeader = nullptr;
+ }
+ }
+ if (COFFHeader) {
+ // The prior checkSize call may have failed. This isn't a hard error
+ // because we were just trying to sniff out bigobj.
+ EC = std::error_code();
+ CurPtr += sizeof(coff_file_header);
+
+ if (COFFHeader->isImportLibrary())
+ return;
+ }
+
+ if (HasPEHeader) {
+ const pe32_header *Header;
+ if ((EC = getObject(Header, Data, base() + CurPtr)))
+ return;
+
+ const uint8_t *DataDirAddr;
+ uint64_t DataDirSize;
+ if (Header->Magic == COFF::PE32Header::PE32) {
+ PE32Header = Header;
+ DataDirAddr = base() + CurPtr + sizeof(pe32_header);
+ DataDirSize = sizeof(data_directory) * PE32Header->NumberOfRvaAndSize;
+ } else if (Header->Magic == COFF::PE32Header::PE32_PLUS) {
+ PE32PlusHeader = reinterpret_cast<const pe32plus_header *>(Header);
+ DataDirAddr = base() + CurPtr + sizeof(pe32plus_header);
+ DataDirSize = sizeof(data_directory) * PE32PlusHeader->NumberOfRvaAndSize;
+ } else {
+ // It's neither PE32 nor PE32+.
+ EC = object_error::parse_failed;
+ return;
+ }
+ if ((EC = getObject(DataDirectory, Data, DataDirAddr, DataDirSize)))
+ return;
+ CurPtr += COFFHeader->SizeOfOptionalHeader;
+ }
+
+ if ((EC = getObject(SectionTable, Data, base() + CurPtr,
+ (uint64_t)getNumberOfSections() * sizeof(coff_section))))
return;
- // Find string table.
- StringTable = reinterpret_cast<const char *>(base())
- + Header->PointerToSymbolTable
- + Header->NumberOfSymbols * sizeof(coff_symbol);
- if (!checkAddr(Data, ec, uintptr_t(StringTable), sizeof(ulittle32_t)))
+ // Initialize the pointer to the symbol table.
+ if (getPointerToSymbolTable() != 0) {
+ if ((EC = initSymbolTablePtr()))
+ return;
+ } else {
+ // We had better not have any symbols if we don't have a symbol table.
+ if (getNumberOfSymbols() != 0) {
+ EC = object_error::parse_failed;
+ return;
+ }
+ }
+
+ // Initialize the pointer to the beginning of the import table.
+ if ((EC = initImportTablePtr()))
+ return;
+ if ((EC = initDelayImportTablePtr()))
return;
- StringTableSize = *reinterpret_cast<const ulittle32_t *>(StringTable);
- if (!checkAddr(Data, ec, uintptr_t(StringTable), StringTableSize))
+ // Initialize the pointer to the export table.
+ if ((EC = initExportTablePtr()))
return;
- // Check that the string table is null terminated if has any in it.
- if (StringTableSize < 4
- || (StringTableSize > 4 && StringTable[StringTableSize - 1] != 0)) {
- ec = object_error::parse_failed;
+
+ // Initialize the pointer to the base relocation table.
+ if ((EC = initBaseRelocPtr()))
return;
- }
-
- ec = object_error::success;
+
+ EC = std::error_code();
}
-ObjectFile::symbol_iterator COFFObjectFile::begin_symbols() const {
- DataRefImpl ret;
- std::memset(&ret, 0, sizeof(DataRefImpl));
- ret.p = reinterpret_cast<intptr_t>(SymbolTable);
- return symbol_iterator(SymbolRef(ret, this));
+basic_symbol_iterator COFFObjectFile::symbol_begin_impl() const {
+ DataRefImpl Ret;
+ Ret.p = getSymbolTable();
+ return basic_symbol_iterator(SymbolRef(Ret, this));
}
-ObjectFile::symbol_iterator COFFObjectFile::end_symbols() const {
+basic_symbol_iterator COFFObjectFile::symbol_end_impl() const {
// The symbol table ends where the string table begins.
- DataRefImpl ret;
- std::memset(&ret, 0, sizeof(DataRefImpl));
- ret.p = reinterpret_cast<intptr_t>(StringTable);
- return symbol_iterator(SymbolRef(ret, this));
+ DataRefImpl Ret;
+ Ret.p = reinterpret_cast<uintptr_t>(StringTable);
+ return basic_symbol_iterator(SymbolRef(Ret, this));
+}
+
+import_directory_iterator COFFObjectFile::import_directory_begin() const {
+ return import_directory_iterator(
+ ImportDirectoryEntryRef(ImportDirectory, 0, this));
+}
+
+import_directory_iterator COFFObjectFile::import_directory_end() const {
+ return import_directory_iterator(
+ ImportDirectoryEntryRef(ImportDirectory, NumberOfImportDirectory, this));
+}
+
+delay_import_directory_iterator
+COFFObjectFile::delay_import_directory_begin() const {
+ return delay_import_directory_iterator(
+ DelayImportDirectoryEntryRef(DelayImportDirectory, 0, this));
+}
+
+delay_import_directory_iterator
+COFFObjectFile::delay_import_directory_end() const {
+ return delay_import_directory_iterator(
+ DelayImportDirectoryEntryRef(
+ DelayImportDirectory, NumberOfDelayImportDirectory, this));
}
-ObjectFile::section_iterator COFFObjectFile::begin_sections() const {
- DataRefImpl ret;
- std::memset(&ret, 0, sizeof(DataRefImpl));
- ret.p = reinterpret_cast<intptr_t>(SectionTable);
- return section_iterator(SectionRef(ret, this));
+export_directory_iterator COFFObjectFile::export_directory_begin() const {
+ return export_directory_iterator(
+ ExportDirectoryEntryRef(ExportDirectory, 0, this));
}
-ObjectFile::section_iterator COFFObjectFile::end_sections() const {
- DataRefImpl ret;
- std::memset(&ret, 0, sizeof(DataRefImpl));
- ret.p = reinterpret_cast<intptr_t>(SectionTable + Header->NumberOfSections);
- return section_iterator(SectionRef(ret, this));
+export_directory_iterator COFFObjectFile::export_directory_end() const {
+ if (!ExportDirectory)
+ return export_directory_iterator(ExportDirectoryEntryRef(nullptr, 0, this));
+ ExportDirectoryEntryRef Ref(ExportDirectory,
+ ExportDirectory->AddressTableEntries, this);
+ return export_directory_iterator(Ref);
+}
+
+section_iterator COFFObjectFile::section_begin() const {
+ DataRefImpl Ret;
+ Ret.p = reinterpret_cast<uintptr_t>(SectionTable);
+ return section_iterator(SectionRef(Ret, this));
+}
+
+section_iterator COFFObjectFile::section_end() const {
+ DataRefImpl Ret;
+ int NumSections =
+ COFFHeader && COFFHeader->isImportLibrary() ? 0 : getNumberOfSections();
+ Ret.p = reinterpret_cast<uintptr_t>(SectionTable + NumSections);
+ return section_iterator(SectionRef(Ret, this));
+}
+
+base_reloc_iterator COFFObjectFile::base_reloc_begin() const {
+ return base_reloc_iterator(BaseRelocRef(BaseRelocHeader, this));
+}
+
+base_reloc_iterator COFFObjectFile::base_reloc_end() const {
+ return base_reloc_iterator(BaseRelocRef(BaseRelocEnd, this));
}
uint8_t COFFObjectFile::getBytesInAddress() const {
}
StringRef COFFObjectFile::getFileFormatName() const {
- switch(Header->Machine) {
+ switch(getMachine()) {
case COFF::IMAGE_FILE_MACHINE_I386:
return "COFF-i386";
case COFF::IMAGE_FILE_MACHINE_AMD64:
return "COFF-x86-64";
+ case COFF::IMAGE_FILE_MACHINE_ARMNT:
+ return "COFF-ARM";
+ case COFF::IMAGE_FILE_MACHINE_ARM64:
+ return "COFF-ARM64";
default:
return "COFF-<unknown arch>";
}
}
unsigned COFFObjectFile::getArch() const {
- switch(Header->Machine) {
+ switch (getMachine()) {
case COFF::IMAGE_FILE_MACHINE_I386:
return Triple::x86;
case COFF::IMAGE_FILE_MACHINE_AMD64:
return Triple::x86_64;
+ case COFF::IMAGE_FILE_MACHINE_ARMNT:
+ return Triple::thumb;
+ case COFF::IMAGE_FILE_MACHINE_ARM64:
+ return Triple::aarch64;
default:
return Triple::UnknownArch;
}
}
-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
+iterator_range<import_directory_iterator>
+COFFObjectFile::import_directories() const {
+ return make_range(import_directory_begin(), import_directory_end());
+}
+
+iterator_range<delay_import_directory_iterator>
+COFFObjectFile::delay_import_directories() const {
+ return make_range(delay_import_directory_begin(),
+ delay_import_directory_end());
+}
+
+iterator_range<export_directory_iterator>
+COFFObjectFile::export_directories() const {
+ return make_range(export_directory_begin(), export_directory_end());
+}
+
+iterator_range<base_reloc_iterator> COFFObjectFile::base_relocs() const {
+ return make_range(base_reloc_begin(), base_reloc_end());
+}
+
+std::error_code COFFObjectFile::getPE32Header(const pe32_header *&Res) const {
+ Res = PE32Header;
+ return std::error_code();
+}
+
+std::error_code
+COFFObjectFile::getPE32PlusHeader(const pe32plus_header *&Res) const {
+ Res = PE32PlusHeader;
+ return std::error_code();
+}
+
+std::error_code
+COFFObjectFile::getDataDirectory(uint32_t Index,
+ const data_directory *&Res) const {
+ // Error if if there's no data directory or the index is out of range.
+ if (!DataDirectory) {
+ Res = nullptr;
+ return object_error::parse_failed;
+ }
+ assert(PE32Header || PE32PlusHeader);
+ uint32_t NumEnt = PE32Header ? PE32Header->NumberOfRvaAndSize
+ : PE32PlusHeader->NumberOfRvaAndSize;
+ if (Index >= NumEnt) {
+ Res = nullptr;
return object_error::parse_failed;
- return object_error::success;
+ }
+ Res = &DataDirectory[Index];
+ return std::error_code();
}
-error_code COFFObjectFile::getString(uint32_t offset,
- StringRef &Result) const {
+std::error_code COFFObjectFile::getSection(int32_t Index,
+ const coff_section *&Result) const {
+ Result = nullptr;
+ if (COFF::isReservedSectionNumber(Index))
+ return std::error_code();
+ if (static_cast<uint32_t>(Index) <= getNumberOfSections()) {
+ // We already verified the section table data, so no need to check again.
+ Result = SectionTable + (Index - 1);
+ return std::error_code();
+ }
+ return object_error::parse_failed;
+}
+
+std::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)
+ if (Offset >= StringTableSize)
return object_error::unexpected_eof;
- Result = StringRef(StringTable + offset);
- return object_error::success;
+ Result = StringRef(StringTable + Offset);
+ return std::error_code();
+}
+
+std::error_code COFFObjectFile::getSymbolName(COFFSymbolRef Symbol,
+ StringRef &Res) const {
+ return getSymbolName(Symbol.getGeneric(), Res);
+}
+
+std::error_code COFFObjectFile::getSymbolName(const coff_symbol_generic *Symbol,
+ StringRef &Res) const {
+ // Check for string table entry. First 4 bytes are 0.
+ if (Symbol->Name.Offset.Zeroes == 0) {
+ if (std::error_code EC = getString(Symbol->Name.Offset.Offset, Res))
+ return EC;
+ return std::error_code();
+ }
+
+ if (Symbol->Name.ShortName[COFF::NameSize - 1] == 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, COFF::NameSize);
+ return std::error_code();
+}
+
+ArrayRef<uint8_t>
+COFFObjectFile::getSymbolAuxData(COFFSymbolRef Symbol) const {
+ const uint8_t *Aux = nullptr;
+
+ size_t SymbolSize = getSymbolTableEntrySize();
+ if (Symbol.getNumberOfAuxSymbols() > 0) {
+ // AUX data comes immediately after the symbol in COFF
+ Aux = reinterpret_cast<const uint8_t *>(Symbol.getRawPtr()) + SymbolSize;
+# 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 < getPointerToSymbolTable() ||
+ Offset >=
+ getPointerToSymbolTable() + (getNumberOfSymbols() * SymbolSize))
+ report_fatal_error("Aux Symbol data was outside of symbol table.");
+
+ assert((Offset - getPointerToSymbolTable()) % SymbolSize == 0 &&
+ "Aux Symbol data did not point to the beginning of a symbol");
+# endif
+ }
+ return makeArrayRef(Aux, Symbol.getNumberOfAuxSymbols() * SymbolSize);
+}
+
+std::error_code COFFObjectFile::getSectionName(const coff_section *Sec,
+ StringRef &Res) const {
+ StringRef Name;
+ if (Sec->Name[COFF::NameSize - 1] == 0)
+ // Null terminated, let ::strlen figure out the length.
+ Name = Sec->Name;
+ else
+ // Not null terminated, use all 8 bytes.
+ Name = StringRef(Sec->Name, COFF::NameSize);
+
+ // Check for string table entry. First byte is '/'.
+ if (Name.startswith("/")) {
+ uint32_t Offset;
+ if (Name.startswith("//")) {
+ if (decodeBase64StringEntry(Name.substr(2), Offset))
+ return object_error::parse_failed;
+ } else {
+ if (Name.substr(1).getAsInteger(10, Offset))
+ return object_error::parse_failed;
+ }
+ if (std::error_code EC = getString(Offset, Name))
+ return EC;
+ }
+
+ Res = Name;
+ return std::error_code();
+}
+
+uint64_t COFFObjectFile::getSectionSize(const coff_section *Sec) const {
+ // SizeOfRawData and VirtualSize change what they represent depending on
+ // whether or not we have an executable image.
+ //
+ // For object files, SizeOfRawData contains the size of section's data;
+ // VirtualSize should be zero but isn't due to buggy COFF writers.
+ //
+ // For executables, SizeOfRawData *must* be a multiple of FileAlignment; the
+ // actual section size is in VirtualSize. It is possible for VirtualSize to
+ // be greater than SizeOfRawData; the contents past that point should be
+ // considered to be zero.
+ if (getDOSHeader())
+ return std::min(Sec->VirtualSize, Sec->SizeOfRawData);
+ return Sec->SizeOfRawData;
+}
+
+std::error_code
+COFFObjectFile::getSectionContents(const coff_section *Sec,
+ ArrayRef<uint8_t> &Res) const {
+ // PointerToRawData and SizeOfRawData won't make sense for BSS sections,
+ // don't do anything interesting for them.
+ assert((Sec->Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) == 0 &&
+ "BSS sections don't have contents!");
+ // 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;
+ uint32_t SectionSize = getSectionSize(Sec);
+ if (checkOffset(Data, ConStart, SectionSize))
+ return object_error::parse_failed;
+ Res = makeArrayRef(reinterpret_cast<const uint8_t *>(ConStart), SectionSize);
+ return std::error_code();
+}
+
+const coff_relocation *COFFObjectFile::toRel(DataRefImpl Rel) const {
+ return reinterpret_cast<const coff_relocation*>(Rel.p);
+}
+
+void COFFObjectFile::moveRelocationNext(DataRefImpl &Rel) const {
+ Rel.p = reinterpret_cast<uintptr_t>(
+ reinterpret_cast<const coff_relocation*>(Rel.p) + 1);
+}
+
+uint64_t COFFObjectFile::getRelocationOffset(DataRefImpl Rel) const {
+ const coff_relocation *R = toRel(Rel);
+ return R->VirtualAddress;
+}
+
+symbol_iterator COFFObjectFile::getRelocationSymbol(DataRefImpl Rel) const {
+ const coff_relocation *R = toRel(Rel);
+ DataRefImpl Ref;
+ if (R->SymbolTableIndex >= getNumberOfSymbols())
+ return symbol_end();
+ if (SymbolTable16)
+ Ref.p = reinterpret_cast<uintptr_t>(SymbolTable16 + R->SymbolTableIndex);
+ else if (SymbolTable32)
+ Ref.p = reinterpret_cast<uintptr_t>(SymbolTable32 + R->SymbolTableIndex);
+ else
+ llvm_unreachable("no symbol table pointer!");
+ return symbol_iterator(SymbolRef(Ref, this));
+}
+
+uint64_t COFFObjectFile::getRelocationType(DataRefImpl Rel) const {
+ const coff_relocation* R = toRel(Rel);
+ return R->Type;
+}
+
+const coff_section *
+COFFObjectFile::getCOFFSection(const SectionRef &Section) const {
+ return toSec(Section.getRawDataRefImpl());
+}
+
+COFFSymbolRef COFFObjectFile::getCOFFSymbol(const DataRefImpl &Ref) const {
+ if (SymbolTable16)
+ return toSymb<coff_symbol16>(Ref);
+ if (SymbolTable32)
+ return toSymb<coff_symbol32>(Ref);
+ llvm_unreachable("no symbol table pointer!");
+}
+
+COFFSymbolRef COFFObjectFile::getCOFFSymbol(const SymbolRef &Symbol) const {
+ return getCOFFSymbol(Symbol.getRawDataRefImpl());
+}
+
+const coff_relocation *
+COFFObjectFile::getCOFFRelocation(const RelocationRef &Reloc) const {
+ return toRel(Reloc.getRawDataRefImpl());
+}
+
+iterator_range<const coff_relocation *>
+COFFObjectFile::getRelocations(const coff_section *Sec) const {
+ const coff_relocation *I = getFirstReloc(Sec, Data, base());
+ const coff_relocation *E = I;
+ if (I)
+ E += getNumberOfRelocations(Sec, Data, base());
+ return make_range(I, E);
+}
+
+#define LLVM_COFF_SWITCH_RELOC_TYPE_NAME(reloc_type) \
+ case COFF::reloc_type: \
+ Res = #reloc_type; \
+ break;
+
+void COFFObjectFile::getRelocationTypeName(
+ DataRefImpl Rel, SmallVectorImpl<char> &Result) const {
+ const coff_relocation *Reloc = toRel(Rel);
+ StringRef Res;
+ switch (getMachine()) {
+ 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_ARMNT:
+ switch (Reloc->Type) {
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ABSOLUTE);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_ADDR32NB);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH11);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_TOKEN);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX24);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX11);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECTION);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_SECREL);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32A);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_MOV32T);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH20T);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BRANCH24T);
+ LLVM_COFF_SWITCH_RELOC_TYPE_NAME(IMAGE_REL_ARM_BLX23T);
+ 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());
+}
+
+#undef LLVM_COFF_SWITCH_RELOC_TYPE_NAME
+
+bool COFFObjectFile::isRelocatableObject() const {
+ return !DataDirectory;
+}
+
+bool ImportDirectoryEntryRef::
+operator==(const ImportDirectoryEntryRef &Other) const {
+ return ImportTable == Other.ImportTable && Index == Other.Index;
+}
+
+void ImportDirectoryEntryRef::moveNext() {
+ ++Index;
+}
+
+std::error_code ImportDirectoryEntryRef::getImportTableEntry(
+ const import_directory_table_entry *&Result) const {
+ Result = ImportTable + Index;
+ return std::error_code();
+}
+
+static imported_symbol_iterator
+makeImportedSymbolIterator(const COFFObjectFile *Object,
+ uintptr_t Ptr, int Index) {
+ if (Object->getBytesInAddress() == 4) {
+ auto *P = reinterpret_cast<const import_lookup_table_entry32 *>(Ptr);
+ return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
+ }
+ auto *P = reinterpret_cast<const import_lookup_table_entry64 *>(Ptr);
+ return imported_symbol_iterator(ImportedSymbolRef(P, Index, Object));
+}
+
+static imported_symbol_iterator
+importedSymbolBegin(uint32_t RVA, const COFFObjectFile *Object) {
+ uintptr_t IntPtr = 0;
+ Object->getRvaPtr(RVA, IntPtr);
+ return makeImportedSymbolIterator(Object, IntPtr, 0);
+}
+
+static imported_symbol_iterator
+importedSymbolEnd(uint32_t RVA, const COFFObjectFile *Object) {
+ uintptr_t IntPtr = 0;
+ Object->getRvaPtr(RVA, IntPtr);
+ // Forward the pointer to the last entry which is null.
+ int Index = 0;
+ if (Object->getBytesInAddress() == 4) {
+ auto *Entry = reinterpret_cast<ulittle32_t *>(IntPtr);
+ while (*Entry++)
+ ++Index;
+ } else {
+ auto *Entry = reinterpret_cast<ulittle64_t *>(IntPtr);
+ while (*Entry++)
+ ++Index;
+ }
+ return makeImportedSymbolIterator(Object, IntPtr, Index);
+}
+
+imported_symbol_iterator
+ImportDirectoryEntryRef::imported_symbol_begin() const {
+ return importedSymbolBegin(ImportTable[Index].ImportLookupTableRVA,
+ OwningObject);
+}
+
+imported_symbol_iterator
+ImportDirectoryEntryRef::imported_symbol_end() const {
+ return importedSymbolEnd(ImportTable[Index].ImportLookupTableRVA,
+ OwningObject);
+}
+
+iterator_range<imported_symbol_iterator>
+ImportDirectoryEntryRef::imported_symbols() const {
+ return make_range(imported_symbol_begin(), imported_symbol_end());
+}
+
+std::error_code ImportDirectoryEntryRef::getName(StringRef &Result) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC =
+ OwningObject->getRvaPtr(ImportTable[Index].NameRVA, IntPtr))
+ return EC;
+ Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+ return std::error_code();
+}
+
+std::error_code
+ImportDirectoryEntryRef::getImportLookupTableRVA(uint32_t &Result) const {
+ Result = ImportTable[Index].ImportLookupTableRVA;
+ return std::error_code();
+}
+
+std::error_code
+ImportDirectoryEntryRef::getImportAddressTableRVA(uint32_t &Result) const {
+ Result = ImportTable[Index].ImportAddressTableRVA;
+ return std::error_code();
+}
+
+std::error_code ImportDirectoryEntryRef::getImportLookupEntry(
+ const import_lookup_table_entry32 *&Result) const {
+ uintptr_t IntPtr = 0;
+ uint32_t RVA = ImportTable[Index].ImportLookupTableRVA;
+ if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
+ return EC;
+ Result = reinterpret_cast<const import_lookup_table_entry32 *>(IntPtr);
+ return std::error_code();
+}
+
+bool DelayImportDirectoryEntryRef::
+operator==(const DelayImportDirectoryEntryRef &Other) const {
+ return Table == Other.Table && Index == Other.Index;
+}
+
+void DelayImportDirectoryEntryRef::moveNext() {
+ ++Index;
+}
+
+imported_symbol_iterator
+DelayImportDirectoryEntryRef::imported_symbol_begin() const {
+ return importedSymbolBegin(Table[Index].DelayImportNameTable,
+ OwningObject);
+}
+
+imported_symbol_iterator
+DelayImportDirectoryEntryRef::imported_symbol_end() const {
+ return importedSymbolEnd(Table[Index].DelayImportNameTable,
+ OwningObject);
+}
+
+iterator_range<imported_symbol_iterator>
+DelayImportDirectoryEntryRef::imported_symbols() const {
+ return make_range(imported_symbol_begin(), imported_symbol_end());
+}
+
+std::error_code DelayImportDirectoryEntryRef::getName(StringRef &Result) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = OwningObject->getRvaPtr(Table[Index].Name, IntPtr))
+ return EC;
+ Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+ return std::error_code();
+}
+
+std::error_code DelayImportDirectoryEntryRef::
+getDelayImportTable(const delay_import_directory_table_entry *&Result) const {
+ Result = Table;
+ return std::error_code();
+}
+
+std::error_code DelayImportDirectoryEntryRef::
+getImportAddress(int AddrIndex, uint64_t &Result) const {
+ uint32_t RVA = Table[Index].DelayImportAddressTable +
+ AddrIndex * (OwningObject->is64() ? 8 : 4);
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
+ return EC;
+ if (OwningObject->is64())
+ Result = *reinterpret_cast<const ulittle64_t *>(IntPtr);
+ else
+ Result = *reinterpret_cast<const ulittle32_t *>(IntPtr);
+ return std::error_code();
}
-namespace llvm {
+bool ExportDirectoryEntryRef::
+operator==(const ExportDirectoryEntryRef &Other) const {
+ return ExportTable == Other.ExportTable && Index == Other.Index;
+}
+
+void ExportDirectoryEntryRef::moveNext() {
+ ++Index;
+}
+
+// Returns the name of the current export symbol. If the symbol is exported only
+// by ordinal, the empty string is set as a result.
+std::error_code ExportDirectoryEntryRef::getDllName(StringRef &Result) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC =
+ OwningObject->getRvaPtr(ExportTable->NameRVA, IntPtr))
+ return EC;
+ Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+ return std::error_code();
+}
- ObjectFile *ObjectFile::createCOFFObjectFile(MemoryBuffer *Object) {
- error_code ec;
- return new COFFObjectFile(Object, ec);
+// Returns the starting ordinal number.
+std::error_code
+ExportDirectoryEntryRef::getOrdinalBase(uint32_t &Result) const {
+ Result = ExportTable->OrdinalBase;
+ return std::error_code();
+}
+
+// Returns the export ordinal of the current export symbol.
+std::error_code ExportDirectoryEntryRef::getOrdinal(uint32_t &Result) const {
+ Result = ExportTable->OrdinalBase + Index;
+ return std::error_code();
+}
+
+// Returns the address of the current export symbol.
+std::error_code ExportDirectoryEntryRef::getExportRVA(uint32_t &Result) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC =
+ OwningObject->getRvaPtr(ExportTable->ExportAddressTableRVA, IntPtr))
+ return EC;
+ const export_address_table_entry *entry =
+ reinterpret_cast<const export_address_table_entry *>(IntPtr);
+ Result = entry[Index].ExportRVA;
+ return std::error_code();
+}
+
+// Returns the name of the current export symbol. If the symbol is exported only
+// by ordinal, the empty string is set as a result.
+std::error_code
+ExportDirectoryEntryRef::getSymbolName(StringRef &Result) const {
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC =
+ OwningObject->getRvaPtr(ExportTable->OrdinalTableRVA, IntPtr))
+ return EC;
+ const ulittle16_t *Start = reinterpret_cast<const ulittle16_t *>(IntPtr);
+
+ uint32_t NumEntries = ExportTable->NumberOfNamePointers;
+ int Offset = 0;
+ for (const ulittle16_t *I = Start, *E = Start + NumEntries;
+ I < E; ++I, ++Offset) {
+ if (*I != Index)
+ continue;
+ if (std::error_code EC =
+ OwningObject->getRvaPtr(ExportTable->NamePointerRVA, IntPtr))
+ return EC;
+ const ulittle32_t *NamePtr = reinterpret_cast<const ulittle32_t *>(IntPtr);
+ if (std::error_code EC = OwningObject->getRvaPtr(NamePtr[Offset], IntPtr))
+ return EC;
+ Result = StringRef(reinterpret_cast<const char *>(IntPtr));
+ return std::error_code();
}
+ Result = "";
+ return std::error_code();
+}
+
+bool ImportedSymbolRef::
+operator==(const ImportedSymbolRef &Other) const {
+ return Entry32 == Other.Entry32 && Entry64 == Other.Entry64
+ && Index == Other.Index;
+}
-} // end namespace llvm
+void ImportedSymbolRef::moveNext() {
+ ++Index;
+}
+
+std::error_code
+ImportedSymbolRef::getSymbolName(StringRef &Result) const {
+ uint32_t RVA;
+ if (Entry32) {
+ // If a symbol is imported only by ordinal, it has no name.
+ if (Entry32[Index].isOrdinal())
+ return std::error_code();
+ RVA = Entry32[Index].getHintNameRVA();
+ } else {
+ if (Entry64[Index].isOrdinal())
+ return std::error_code();
+ RVA = Entry64[Index].getHintNameRVA();
+ }
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
+ return EC;
+ // +2 because the first two bytes is hint.
+ Result = StringRef(reinterpret_cast<const char *>(IntPtr + 2));
+ return std::error_code();
+}
+
+std::error_code ImportedSymbolRef::getOrdinal(uint16_t &Result) const {
+ uint32_t RVA;
+ if (Entry32) {
+ if (Entry32[Index].isOrdinal()) {
+ Result = Entry32[Index].getOrdinal();
+ return std::error_code();
+ }
+ RVA = Entry32[Index].getHintNameRVA();
+ } else {
+ if (Entry64[Index].isOrdinal()) {
+ Result = Entry64[Index].getOrdinal();
+ return std::error_code();
+ }
+ RVA = Entry64[Index].getHintNameRVA();
+ }
+ uintptr_t IntPtr = 0;
+ if (std::error_code EC = OwningObject->getRvaPtr(RVA, IntPtr))
+ return EC;
+ Result = *reinterpret_cast<const ulittle16_t *>(IntPtr);
+ return std::error_code();
+}
+
+ErrorOr<std::unique_ptr<COFFObjectFile>>
+ObjectFile::createCOFFObjectFile(MemoryBufferRef Object) {
+ std::error_code EC;
+ std::unique_ptr<COFFObjectFile> Ret(new COFFObjectFile(Object, EC));
+ if (EC)
+ return EC;
+ return std::move(Ret);
+}
+
+bool BaseRelocRef::operator==(const BaseRelocRef &Other) const {
+ return Header == Other.Header && Index == Other.Index;
+}
+
+void BaseRelocRef::moveNext() {
+ // Header->BlockSize is the size of the current block, including the
+ // size of the header itself.
+ uint32_t Size = sizeof(*Header) +
+ sizeof(coff_base_reloc_block_entry) * (Index + 1);
+ if (Size == Header->BlockSize) {
+ // .reloc contains a list of base relocation blocks. Each block
+ // consists of the header followed by entries. The header contains
+ // how many entories will follow. When we reach the end of the
+ // current block, proceed to the next block.
+ Header = reinterpret_cast<const coff_base_reloc_block_header *>(
+ reinterpret_cast<const uint8_t *>(Header) + Size);
+ Index = 0;
+ } else {
+ ++Index;
+ }
+}
+
+std::error_code BaseRelocRef::getType(uint8_t &Type) const {
+ auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
+ Type = Entry[Index].getType();
+ return std::error_code();
+}
+
+std::error_code BaseRelocRef::getRVA(uint32_t &Result) const {
+ auto *Entry = reinterpret_cast<const coff_base_reloc_block_entry *>(Header + 1);
+ Result = Header->PageRVA + Entry[Index].getOffset();
+ return std::error_code();
+}
projects / oota-llvm.git / blobdiff