scripts/mod/mk_elfconfig.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <elf.h>
   6
   7 int
   8 main(int argc, char **argv)
   9 {
  10         unsigned char ei[EI_NIDENT];
  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
  31         return 0;
  32 }