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|--text|--realmode] vmlinux\n");
  15 }
  16
  17 int main(int argc, char **argv)
  18 {
  19         int show_absolute_syms, show_absolute_relocs;
  20         int as_text, use_real_mode;
  21         const char *fname;
  22         FILE *fp;
  23         int i;
  24         unsigned char e_ident[EI_NIDENT];
  25
  26         show_absolute_syms = 0;
  27         show_absolute_relocs = 0;
  28         as_text = 0;
  29         use_real_mode = 0;
  30         fname = NULL;
  31         for (i = 1; i < argc; i++) {
  32                 char *arg = argv[i];
  33                 if (*arg == '-') {
  34                         if (strcmp(arg, "--abs-syms") == 0) {
  35                                 show_absolute_syms = 1;
  36                                 continue;
  37                         }
  38                         if (strcmp(arg, "--abs-relocs") == 0) {
  39                                 show_absolute_relocs = 1;
  40                                 continue;
  41                         }
  42                         if (strcmp(arg, "--text") == 0) {
  43                                 as_text = 1;
  44                                 continue;
  45                         }
  46                         if (strcmp(arg, "--realmode") == 0) {
  47                                 use_real_mode = 1;
  48                                 continue;
  49                         }
  50                 }
  51                 else if (!fname) {
  52                         fname = arg;
  53                         continue;
  54                 }
  55                 usage();
  56         }
  57         if (!fname) {
  58                 usage();
  59         }
  60         fp = fopen(fname, "r");
  61         if (!fp) {
  62                 die("Cannot open %s: %s\n", fname, strerror(errno));
  63         }
  64         if (fread(&e_ident, 1, EI_NIDENT, fp) != EI_NIDENT) {
  65                 die("Cannot read %s: %s", fname, strerror(errno));
  66         }
  67         rewind(fp);
  68         if (e_ident[EI_CLASS] == ELFCLASS64)
  69                 process_64(fp, use_real_mode, as_text,
  70                            show_absolute_syms, show_absolute_relocs);
  71         else
  72                 process_32(fp, use_real_mode, as_text,
  73                            show_absolute_syms, show_absolute_relocs);
  74         fclose(fp);
  75         return 0;
  76 }