LXR linux/arch/mips/boot/tools/relocs

   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
  14void 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
  24static void usage(void)
  25{
  26        die("relocs [--reloc-info|--text|--bin|--keep] vmlinux\n");
  27}
  28
  29int 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}
  86