| 11 | namespace NElf { |
| 12 | |
| 13 | bool IsElf(const TString& path) { |
| 14 | TUnbufferedFileInput in(path); |
| 15 | char buffer[EI_NIDENT]; |
| 16 | size_t nread = in.Load(buffer, sizeof(buffer)); |
| 17 | |
| 18 | if (nread != sizeof(buffer) || TStringBuf(buffer, SELFMAG) != ELFMAG) { |
| 19 | Cerr << "fix_elf skip " << path << " (not an ELF file)"; |
| 20 | return false; |
| 21 | } |
| 22 | |
| 23 | if (buffer[EI_CLASS] != ELFCLASS64) { |
| 24 | Cerr << "fix_elf skip " << path << " (ELF class is not ELF64)"; |
| 25 | return false; |
| 26 | } |
| 27 | |
| 28 | #ifdef _little_endian_ |
| 29 | if (buffer[EI_DATA] != ELFDATA2LSB) { |
| 30 | Cerr << "fix_elf skip " << path << " (ELF byte order is not native LSB)"; |
| 31 | return false; |
| 32 | } |
| 33 | #else |
| 34 | if (buffer[EI_DATA] != ELFDATA2MSB) { |
| 35 | Cerr << "fix_elf skip " << path << " (ELF byte order is not native MSB)"; |
| 36 | return false; |
| 37 | } |
| 38 | #endif |
| 39 | |
| 40 | if (buffer[EI_VERSION] != 1) { |
| 41 | Cerr << "fix_elf skip " << path << " (ELF version is not 1)"; |
| 42 | return false; |
| 43 | } |
| 44 | |
| 45 | return true; |
| 46 | } |
| 47 | |
| 48 | } // namespace NElf |
| 49 | |