diff options
Diffstat (limited to 'contrib/llvm/lib/Support/Path.cpp')
| -rw-r--r-- | contrib/llvm/lib/Support/Path.cpp | 176 |
1 files changed, 2 insertions, 174 deletions
diff --git a/contrib/llvm/lib/Support/Path.cpp b/contrib/llvm/lib/Support/Path.cpp index 80bef558258d..e58f856ca244 100644 --- a/contrib/llvm/lib/Support/Path.cpp +++ b/contrib/llvm/lib/Support/Path.cpp @@ -13,12 +13,12 @@ #include "llvm/Support/Path.h" #include "llvm/ADT/ArrayRef.h" -#include "llvm/Support/COFF.h" +#include "llvm/BinaryFormat/COFF.h" +#include "llvm/BinaryFormat/MachO.h" #include "llvm/Support/Endian.h" #include "llvm/Support/Errc.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FileSystem.h" -#include "llvm/Support/MachO.h" #include "llvm/Support/Process.h" #include <cctype> #include <cstring> @@ -1027,178 +1027,6 @@ void directory_entry::replace_filename(const Twine &filename, file_status st) { Status = st; } -template <size_t N> -static bool startswith(StringRef Magic, const char (&S)[N]) { - return Magic.startswith(StringRef(S, N - 1)); -} - -/// @brief Identify the magic in magic. -file_magic identify_magic(StringRef Magic) { - if (Magic.size() < 4) - return file_magic::unknown; - switch ((unsigned char)Magic[0]) { - case 0x00: { - // COFF bigobj, CL.exe's LTO object file, or short import library file - if (startswith(Magic, "\0\0\xFF\xFF")) { - size_t MinSize = offsetof(COFF::BigObjHeader, UUID) + sizeof(COFF::BigObjMagic); - if (Magic.size() < MinSize) - return file_magic::coff_import_library; - - const char *Start = Magic.data() + offsetof(COFF::BigObjHeader, UUID); - if (memcmp(Start, COFF::BigObjMagic, sizeof(COFF::BigObjMagic)) == 0) - return file_magic::coff_object; - if (memcmp(Start, COFF::ClGlObjMagic, sizeof(COFF::BigObjMagic)) == 0) - return file_magic::coff_cl_gl_object; - return file_magic::coff_import_library; - } - // Windows resource file - if (startswith(Magic, "\0\0\0\0\x20\0\0\0\xFF")) - return file_magic::windows_resource; - // 0x0000 = COFF unknown machine type - if (Magic[1] == 0) - return file_magic::coff_object; - if (startswith(Magic, "\0asm")) - return file_magic::wasm_object; - break; - } - case 0xDE: // 0x0B17C0DE = BC wraper - if (startswith(Magic, "\xDE\xC0\x17\x0B")) - return file_magic::bitcode; - break; - case 'B': - if (startswith(Magic, "BC\xC0\xDE")) - return file_magic::bitcode; - break; - case '!': - if (startswith(Magic, "!<arch>\n") || startswith(Magic, "!<thin>\n")) - return file_magic::archive; - break; - - case '\177': - if (startswith(Magic, "\177ELF") && Magic.size() >= 18) { - bool Data2MSB = Magic[5] == 2; - unsigned high = Data2MSB ? 16 : 17; - unsigned low = Data2MSB ? 17 : 16; - if (Magic[high] == 0) { - switch (Magic[low]) { - default: return file_magic::elf; - case 1: return file_magic::elf_relocatable; - case 2: return file_magic::elf_executable; - case 3: return file_magic::elf_shared_object; - case 4: return file_magic::elf_core; - } - } - // It's still some type of ELF file. - return file_magic::elf; - } - break; - - case 0xCA: - if (startswith(Magic, "\xCA\xFE\xBA\xBE") || - startswith(Magic, "\xCA\xFE\xBA\xBF")) { - // This is complicated by an overlap with Java class files. - // See the Mach-O section in /usr/share/file/magic for details. - if (Magic.size() >= 8 && Magic[7] < 43) - return file_magic::macho_universal_binary; - } - break; - - // The two magic numbers for mach-o are: - // 0xfeedface - 32-bit mach-o - // 0xfeedfacf - 64-bit mach-o - case 0xFE: - case 0xCE: - case 0xCF: { - uint16_t type = 0; - if (startswith(Magic, "\xFE\xED\xFA\xCE") || - startswith(Magic, "\xFE\xED\xFA\xCF")) { - /* Native endian */ - size_t MinSize; - if (Magic[3] == char(0xCE)) - MinSize = sizeof(MachO::mach_header); - else - MinSize = sizeof(MachO::mach_header_64); - if (Magic.size() >= MinSize) - type = Magic[12] << 24 | Magic[13] << 12 | Magic[14] << 8 | Magic[15]; - } else if (startswith(Magic, "\xCE\xFA\xED\xFE") || - startswith(Magic, "\xCF\xFA\xED\xFE")) { - /* Reverse endian */ - size_t MinSize; - if (Magic[0] == char(0xCE)) - MinSize = sizeof(MachO::mach_header); - else - MinSize = sizeof(MachO::mach_header_64); - if (Magic.size() >= MinSize) - type = Magic[15] << 24 | Magic[14] << 12 |Magic[13] << 8 | Magic[12]; - } - switch (type) { - default: break; - case 1: return file_magic::macho_object; - case 2: return file_magic::macho_executable; - case 3: return file_magic::macho_fixed_virtual_memory_shared_lib; - case 4: return file_magic::macho_core; - case 5: return file_magic::macho_preload_executable; - case 6: return file_magic::macho_dynamically_linked_shared_lib; - case 7: return file_magic::macho_dynamic_linker; - case 8: return file_magic::macho_bundle; - case 9: return file_magic::macho_dynamically_linked_shared_lib_stub; - case 10: return file_magic::macho_dsym_companion; - case 11: return file_magic::macho_kext_bundle; - } - break; - } - case 0xF0: // PowerPC Windows - case 0x83: // Alpha 32-bit - case 0x84: // Alpha 64-bit - case 0x66: // MPS R4000 Windows - case 0x50: // mc68K - case 0x4c: // 80386 Windows - case 0xc4: // ARMNT Windows - if (Magic[1] == 0x01) - return file_magic::coff_object; - LLVM_FALLTHROUGH; - - case 0x90: // PA-RISC Windows - case 0x68: // mc68K Windows - if (Magic[1] == 0x02) - return file_magic::coff_object; - break; - - case 'M': // Possible MS-DOS stub on Windows PE file - if (startswith(Magic, "MZ")) { - uint32_t off = read32le(Magic.data() + 0x3c); - // PE/COFF file, either EXE or DLL. - if (off < Magic.size() && - memcmp(Magic.data()+off, COFF::PEMagic, sizeof(COFF::PEMagic)) == 0) - return file_magic::pecoff_executable; - } - break; - - case 0x64: // x86-64 Windows. - if (Magic[1] == char(0x86)) - return file_magic::coff_object; - break; - - default: - break; - } - return file_magic::unknown; -} - -std::error_code identify_magic(const Twine &Path, file_magic &Result) { - int FD; - if (std::error_code EC = openFileForRead(Path, FD)) - return EC; - - char Buffer[32]; - int Length = read(FD, Buffer, sizeof(Buffer)); - if (close(FD) != 0 || Length < 0) - return std::error_code(errno, std::generic_category()); - - Result = identify_magic(StringRef(Buffer, Length)); - return std::error_code(); -} - std::error_code directory_entry::status(file_status &result) const { return fs::status(Path, result, FollowSymlinks); } |