FreeCalypso > hg > freecalypso-reveng
annotate factdiff.c @ 108:85bb35342834
C156 boot code disassembly started
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 31 Mar 2014 16:41:21 +0000 |
parents | 00dedefbdfd1 |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /* |
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2 * The 64 KiB "factory block" at the end of the 2nd flash chip select on |
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3 * Pirelli DP-L10 phones is believed to contain juicy info (IMEI and RF |
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4 * calibration data), but the format is yet to be cracked. |
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5 * |
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6 * This program compares Pirelli factory block images that have been read |
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7 * out of several phones, seeking to determine which bytes are always the |
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8 * same and which bytes change from specimen to specimen. |
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9 * |
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10 * Written by Spacefalcon the Outlaw. |
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11 */ |
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12 |
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13 #include <sys/types.h> |
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14 #include <sys/file.h> |
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15 #include <stdio.h> |
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16 #include <stdlib.h> |
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17 |
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18 u_char specimen0[65536]; |
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19 char is_diff[65536]; |
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20 |
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21 read_specimen_file(filename, buf) |
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22 char *filename; |
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23 u_char *buf; |
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24 { |
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25 int fd, cc; |
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26 |
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27 fd = open(filename, O_RDONLY); |
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28 if (fd < 0) { |
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29 perror(filename); |
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30 exit(1); |
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31 } |
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32 cc = read(fd, buf, 65536); |
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33 close(fd); |
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34 if (cc != 65536) { |
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35 fprintf(stderr, "%s: unable to read 64 KiB\n", filename); |
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36 exit(1); |
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37 } |
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38 } |
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39 |
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40 process_comp_specimen(filename) |
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41 char *filename; |
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42 { |
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43 u_char this_spec[65536]; |
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44 int i; |
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45 |
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46 read_specimen_file(filename, this_spec); |
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47 for (i = 0; i < 65536; i++) |
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48 if (this_spec[i] != specimen0[i]) |
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49 is_diff[i] = 1; |
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50 } |
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51 |
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52 output() |
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53 { |
53
00dedefbdfd1
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54 int off, state, cstart, num; |
52
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55 |
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56 for (off = 0; off < 65536; ) { |
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57 state = is_diff[off]; |
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58 cstart = off; |
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59 while (off < 65536 && is_diff[off] == state) |
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60 off++; |
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61 printf("%04X-%04X: %s", cstart, off-1, |
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62 state ? "varying" : "constant"); |
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00dedefbdfd1
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63 if (state) { |
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64 num = off - cstart; |
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65 printf(" (%d byte%s)", num, num != 1 ? "s" : ""); |
00dedefbdfd1
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66 } |
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67 putchar('\n'); |
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68 } |
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69 } |
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70 |
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71 main(argc, argv) |
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72 char **argv; |
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73 { |
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74 char **ap; |
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75 |
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76 if (argc < 3) { |
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77 fprintf(stderr, "usage: %s specimen0 specimen1 ...\n", argv[0]); |
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78 exit(1); |
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79 } |
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80 read_specimen_file(argv[1], specimen0); |
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81 for (ap = argv + 2; *ap; ap++) |
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82 process_comp_specimen(*ap); |
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83 output(); |
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84 exit(0); |
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85 } |