FreeCalypso > hg > fc-am-toolkit

annotate bootutil/c139_main.c @ 22:873d5f33e8f3

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doc: beginning with FC-aftermarket-intro
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 11 Jun 2023 06:18:53 +0000
parents fe5f7ba7f154
children
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12
fe5f7ba7f154 c139-analyze-boot utility put together, compiles
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This C module is the main for c139-analyze-boot utility.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/file.h>
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7 #include <sys/stat.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <unistd.h>
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13 #include "../bootmatch/bootmatch.h"
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14
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15 extern struct bootmatch bootmatch_c11x_lockable[];
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16 extern struct bootmatch bootmatch_c11x_nolock[];
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17 extern struct bootmatch bootmatch_c139_lockable[];
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18 extern struct bootmatch bootmatch_c139_nolock[];
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19 extern struct bootmatch bootmatch_fc_patch[];
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20
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21 #define LENGTH_OF_INTEREST 0x2064
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22
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23 static u_char image[LENGTH_OF_INTEREST];
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24
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25 static void
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26 read_bin_file(filename)
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27 char *filename;
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28 {
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29 int fd;
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30 struct stat st;
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31
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32 fd = open(filename, O_RDONLY);
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33 if (fd < 0) {
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34 perror(filename);
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35 exit(1);
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36 }
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37 fstat(fd, &st);
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38 if (!S_ISREG(st.st_mode)) {
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39 fprintf(stderr, "error: %s is not a regular file\n", filename);
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40 exit(1);
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41 }
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42 if (st.st_size < LENGTH_OF_INTEREST) {
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43 fprintf(stderr, "error: %s is too short\n", filename);
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44 exit(1);
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45 }
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46 read(fd, image, LENGTH_OF_INTEREST);
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47 close(fd);
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48 }
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49
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50 static int
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51 check_810_signature()
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52 {
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53 if (image[0x810] != '1')
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54 return(0);
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55 if (image[0x811] != '0')
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56 return(0);
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57 if (image[0x812] != '0')
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58 return(0);
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59 if (image[0x813] == '3' || image[0x813] == '4')
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60 return(1);
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61 else
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62 return(0);
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63 }
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64
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65 static void
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66 classify_by_lock_word()
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67 {
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68 unsigned lword;
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69
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70 lword = ((unsigned) image[0x2060]) |
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71 ((unsigned) image[0x2061] << 8) |
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72 ((unsigned) image[0x2062] << 16) |
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73 ((unsigned) image[0x2063] << 24);
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74 if (lword == 0xDDDDDDDD)
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75 puts("unlocked");
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76 else
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77 puts("locked");
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78 }
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79
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80 main(argc, argv)
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81 char **argv;
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82 {
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83 if (argc != 2) {
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84 fprintf(stderr, "usage: %s flashdump.bin\n", argv[0]);
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85 exit(1);
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86 }
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87 read_bin_file(argv[1]);
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88 if (check_for_match(image, bootmatch_fc_patch)) {
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89 puts("fc");
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90 exit(0);
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91 }
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92 if (check_for_match(image, bootmatch_c11x_nolock)) {
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93 puts("unlocked");
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94 exit(0);
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95 }
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96 if (check_for_match(image, bootmatch_c11x_lockable)) {
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97 classify_by_lock_word();
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98 exit(0);
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99 }
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100 if (check_for_match(image, bootmatch_c139_nolock)) {
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101 if (!check_810_signature()) {
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102 puts("unknown");
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103 exit(0);
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104 }
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105 puts("unlocked");
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106 exit(0);
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107 }
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108 if (check_for_match(image, bootmatch_c139_lockable)) {
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109 if (!check_810_signature()) {
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110 puts("unknown");
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111 exit(0);
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112 }
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113 classify_by_lock_word();
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114 exit(0);
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115 }
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116 puts("unknown");
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117 exit(0);
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118 }