arch/x86/tools/relocs_common.c

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