arch/x86/tools/relocs_common.c

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