git.zerfleddert.de Git - rsbs2/blob - firmware.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <unistd.h>
   7 #include <errno.h>
   8 #include <strings.h>
   9 #include "rsb-crc.h"
  10
  11 struct fw_header {
  12         unsigned int unknown[8];
  13         unsigned int len;
  14         char ident[4];
  15         unsigned int offset;
  16         char desc[128];
  17 };
  18
  19 void parse_fw(unsigned char *fw, unsigned int off) {
  20         struct fw_header *header = (struct fw_header*)(fw + off);
  21         static unsigned int last_off;
  22         int i;
  23
  24         printf("Address in file: 0x%08x, Difference to last: %u\n", off, off-last_off);
  25         printf("Unknown: ");
  26         for (i = 0; i < 8; i++)
  27                 printf("0x%08x ", header->unknown[i]);
  28
  29         printf("\n");
  30
  31         printf("Length: %u, possible next entry at: 0x%08x\n", header->len, off + header->len + 22);
  32
  33         printf("Identifier: %.4s\n", header->ident);
  34
  35         printf("Offset: 0x%08x\n", header->offset);
  36
  37         printf("Descriptiom: %s\n", header->desc);
  38
  39         printf("\n");
  40         last_off = off;
  41 }
  42
  43 int main(int argc, char **argv)
  44 {
  45         struct stat statbuf;
  46         unsigned char *fw;
  47         int fd;
  48         int remaining;
  49         int ret;
  50         unsigned int crc;
  51
  52         if (argc != 2) {
  53                 fprintf(stderr,"Syntax: %s firmware.bin\n", argv[0]);
  54                 exit(1);
  55         }
  56
  57         if (stat(argv[1], &statbuf) == -1) {
  58                 perror("stat");
  59                 exit(1);
  60         }
  61
  62         if ((fd = open(argv[1], O_RDONLY)) == -1) {
  63                 perror("open");
  64                 exit(1);
  65         }
  66
  67         if ((fw = malloc(statbuf.st_size)) == NULL) {
  68                 perror("malloc");
  69                 exit(1);
  70         }
  71
  72         bzero(fw, statbuf.st_size);
  73
  74         remaining = statbuf.st_size;
  75
  76         while(remaining) {
  77                 if ((ret = read(fd, fw + (statbuf.st_size - remaining), remaining)) == -1) {
  78                         perror("read");
  79                         exit(1);
  80                 }
  81                 remaining -= ret;
  82         }
  83
  84 #if 0
  85         parse_fw(fw, 0x0);
  86         parse_fw(fw, 0x555c0);
  87         parse_fw(fw, 0x5940e);
  88 #endif
  89
  90         crc = rsb_crc(0, fw, statbuf.st_size-4);
  91
  92         printf("Length: %ld, Checksum: 0x%08x\n", statbuf.st_size-4, crc);
  93
  94         exit(0);
  95 }