| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <elf.h> |
| 5 | |
| 6 | int |
| 7 | main(int argc, char **argv) |
| 8 | { |
| 9 | unsigned char ei[EI_NIDENT]; |
| 10 | union { short s; char c[2]; } endian_test; |
| 11 | |
| 12 | if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) { |
| 13 | fprintf(stderr, "Error: input truncated\n"); |
| 14 | return 1; |
| 15 | } |
| 16 | if (memcmp(ei, ELFMAG, SELFMAG) != 0) { |
| 17 | fprintf(stderr, "Error: not ELF\n"); |
| 18 | return 1; |
| 19 | } |
| 20 | switch (ei[EI_CLASS]) { |
| 21 | case ELFCLASS32: |
| 22 | printf("#define KERNEL_ELFCLASS ELFCLASS32\n"); |
| 23 | break; |
| 24 | case ELFCLASS64: |
| 25 | printf("#define KERNEL_ELFCLASS ELFCLASS64\n"); |
| 26 | break; |
| 27 | default: |
| 28 | exit(1); |
| 29 | } |
| 30 | switch (ei[EI_DATA]) { |
| 31 | case ELFDATA2LSB: |
| 32 | printf("#define KERNEL_ELFDATA ELFDATA2LSB\n"); |
| 33 | break; |
| 34 | case ELFDATA2MSB: |
| 35 | printf("#define KERNEL_ELFDATA ELFDATA2MSB\n"); |
| 36 | break; |
| 37 | default: |
| 38 | exit(1); |
| 39 | } |
| 40 | |
| 41 | if (sizeof(unsigned long) == 4) { |
| 42 | printf("#define HOST_ELFCLASS ELFCLASS32\n"); |
| 43 | } else if (sizeof(unsigned long) == 8) { |
| 44 | printf("#define HOST_ELFCLASS ELFCLASS64\n"); |
| 45 | } |
| 46 | |
| 47 | endian_test.s = 0x0102; |
| 48 | if (memcmp(endian_test.c, "\x01\x02", 2) == 0) |
| 49 | printf("#define HOST_ELFDATA ELFDATA2MSB\n"); |
| 50 | else if (memcmp(endian_test.c, "\x02\x01", 2) == 0) |
| 51 | printf("#define HOST_ELFDATA ELFDATA2LSB\n"); |
| 52 | else |
| 53 | exit(1); |
| 54 | |
| 55 | return 0; |
| 56 | } |