FreeCalypso > hg > freecalypso-reveng
annotate miscprog/pircksum2.c @ 277:5c47d916255e
compal/c156-boot.disasm: GPIO comments were wrong
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 05 Nov 2018 23:18:42 +0000 |
parents | d69f7512e3c1 |
children |
rev | line source |
---|---|
215
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1 /* |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
2 * This program verifies the correctness of the understanding described in the |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
3 * ../pirelli/flash2-chksum write-up. |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
4 */ |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 #include <sys/types.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
7 #include <sys/file.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
8 #include <sys/stat.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
9 #include <sys/mman.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
10 #include <stdio.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
11 #include <stdint.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
12 #include <endian.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
13 #include <stdlib.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
14 #include <unistd.h> |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
15 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
16 char *image_filename; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
17 u_char *image_map, *endrec; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
18 unsigned imgsize, max_imgsize; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
19 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
20 open_and_map_file() |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
21 { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
22 int fd; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
23 struct stat st; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
24 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
25 fd = open(image_filename, O_RDONLY); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
26 if (fd < 0) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
27 perror(image_filename); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
28 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
29 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
30 fstat(fd, &st); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
31 if (!S_ISREG(st.st_mode)) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
32 fprintf(stderr, "error: %s is not a regular file\n", |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
33 image_filename); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
34 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
35 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
36 if (st.st_size != 0x10000 && st.st_size != 0x360000) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
37 fprintf(stderr, "error: %s has an unexpected size\n", |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
38 image_filename); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
39 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
40 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
41 max_imgsize = st.st_size - 12; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
42 image_map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
43 if (image_map == MAP_FAILED) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
44 perror("mmap"); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
45 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
46 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
47 close(fd); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
48 endrec = image_map + max_imgsize; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
49 return 0; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
50 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
51 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
52 verify_chksum1() |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
53 { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
54 uint16_t sum, ref; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
55 unsigned offset; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
56 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
57 sum = 0; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
58 for (offset = 0; offset + 1 < imgsize; offset += 2) |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
59 sum += le16toh(*(uint16_t *)(image_map + offset)); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
60 if (imgsize & 1) |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
61 sum += image_map[offset]; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
62 ref = le16toh(*(uint16_t *)(endrec + 8)); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
63 if (sum == ref) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
64 printf("Checksum 1 matches (%04X)\n", sum); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
65 return 0; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
66 } else { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
67 printf("Checksum 1 FAILED: computed %04X, stored %04X\n", |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
68 sum, ref); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
69 return 1; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
70 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
71 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
72 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
73 verify_chksum2() |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
74 { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
75 uint16_t sum, ref; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
76 unsigned offset; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
77 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
78 sum = 0; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
79 for (offset = 0; offset < 10; offset += 2) |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
80 sum += le16toh(*(uint16_t *)(endrec + offset)); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
81 ref = le16toh(*(uint16_t *)(endrec + 10)); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
82 if (sum == ref) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
83 printf("Checksum 2 matches (%04X)\n", sum); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
84 return 0; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
85 } else { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
86 printf("Checksum 2 FAILED: computed %04X, stored %04X\n", |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
87 sum, ref); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
88 return 1; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
89 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
90 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
91 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
92 main(argc, argv) |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
93 char **argv; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
94 { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
95 int stat1, stat2; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
96 |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
97 if (argc != 2) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
98 fprintf(stderr, "usage: %s image-filename\n", argv[0]); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
99 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
100 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
101 image_filename = argv[1]; |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
102 open_and_map_file(); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
103 if (le32toh(*(uint32_t *)endrec) != 0x12345678) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
104 printf("Error: 0x12345678 signature missing\n"); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
105 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
106 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
107 imgsize = le32toh(*(uint32_t *)(endrec + 4)); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
108 if (imgsize < 1 || imgsize > max_imgsize) { |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
109 printf("Error: bogus image size of 0x%x bytes\n", imgsize); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
110 exit(1); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
111 } |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
112 printf("Image size: 0x%x bytes\n", imgsize); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
113 stat1 = verify_chksum1(); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
114 stat2 = verify_chksum2(); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
115 exit(stat1 || stat2); |
d69f7512e3c1
Pirelli: documented and verified the checksum scheme used for the factory block
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
116 } |