arch/mips/boot/tools/relocs_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2
   3 #include <stdio.h>
   4 #include <stdint.h>
   5 #include <stdarg.h>
   6 #include <stdlib.h>
   7 #include <string.h>
   8 #include <errno.h>
   9 #include <endian.h>
  10 #include <elf.h>
  11
  12 #include "relocs.h"
  13
  14 void die(char *fmt, ...)
  15 {
  16         va_list ap;
  17
  18         va_start(ap, fmt);
  19         vfprintf(stderr, fmt, ap);
  20         va_end(ap);
  21         exit(1);
  22 }
  23
  24 static void usage(void)
  25 {
  26         die("relocs [--reloc-info|--text|--bin|--keep] vmlinux\n");
  27 }
  28
  29 int main(int argc, char **argv)
  30 {
  31         int show_reloc_info, as_text, as_bin, keep_relocs;
  32         const char *fname;
  33         FILE *fp;
  34         int i;
  35         unsigned char e_ident[EI_NIDENT];
  36
  37         show_reloc_info = 0;
  38         as_text = 0;
  39         as_bin = 0;
  40         keep_relocs = 0;
  41         fname = NULL;
  42         for (i = 1; i < argc; i++) {
  43                 char *arg = argv[i];
  44
  45                 if (*arg == '-') {
  46                         if (strcmp(arg, "--reloc-info") == 0) {
  47                                 show_reloc_info = 1;
  48                                 continue;
  49                         }
  50                         if (strcmp(arg, "--text") == 0) {
  51                                 as_text = 1;
  52                                 continue;
  53                         }
  54                         if (strcmp(arg, "--bin") == 0) {
  55                                 as_bin = 1;
  56                                 continue;
  57                         }
  58                         if (strcmp(arg, "--keep") == 0) {
  59                                 keep_relocs = 1;
  60                                 continue;
  61                         }
  62                 } else if (!fname) {
  63                         fname = arg;
  64                         continue;
  65                 }
  66                 usage();
  67         }
  68         if (!fname)
  69                 usage();
  70
  71         fp = fopen(fname, "r+");
  72         if (!fp)
  73                 die("Cannot open %s: %s\n", fname, strerror(errno));
  74
  75         if (fread(&e_ident, 1, EI_NIDENT, fp) != EI_NIDENT)
  76                 die("Cannot read %s: %s", fname, strerror(errno));
  77
  78         rewind(fp);
  79         if (e_ident[EI_CLASS] == ELFCLASS64)
  80                 process_64(fp, as_text,  as_bin, show_reloc_info, keep_relocs);
  81         else
  82                 process_32(fp, as_text, as_bin, show_reloc_info, keep_relocs);
  83         fclose(fp);
  84         return 0;
  85 }