FreeCalypso > hg > freecalypso-tools

annotate ffstools/tiffs-rd/basics.c @ 416:30f6d1c32c6f

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doc/Flash-boot-defect article removed (no longer relevant) This article is no longer relevant because the issue in question only affected one (1) defective FCDEV3B board which was not and never will be sold.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 26 Oct 2018 07:11:08 +0000
parents e7502631a0f9
children
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0
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * This C module implements the "basics" of TIFFS image analysis.
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Mychaela Falconia <falcon@freecalypso.org>
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3 */
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Mychaela Falconia <falcon@freecalypso.org>
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4
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Mychaela Falconia <falcon@freecalypso.org>
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5 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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6 #include <sys/file.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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7 #include <sys/stat.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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8 #include <sys/mman.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 #include <stdio.h>
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Mychaela Falconia <falcon@freecalypso.org>
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10 #include <stdlib.h>
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Mychaela Falconia <falcon@freecalypso.org>
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11 #include <unistd.h>
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Mychaela Falconia <falcon@freecalypso.org>
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12 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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13 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include "types.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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15 #include "struct.h"
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 #include "globals.h"
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Mychaela Falconia <falcon@freecalypso.org>
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17
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Mychaela Falconia <falcon@freecalypso.org>
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18 u8 tiffs_header[6] = {'F', 'f', 's', '#', 0x10, 0x02};
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Mychaela Falconia <falcon@freecalypso.org>
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19
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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20 read_ffs_image()
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Mychaela Falconia <falcon@freecalypso.org>
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21 {
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Mychaela Falconia <falcon@freecalypso.org>
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22 int fd;
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Mychaela Falconia <falcon@freecalypso.org>
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23 struct stat st;
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24
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Mychaela Falconia <falcon@freecalypso.org>
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25 fd = open(imgfile, O_RDONLY);
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Mychaela Falconia <falcon@freecalypso.org>
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26 if (fd < 0) {
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Mychaela Falconia <falcon@freecalypso.org>
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27 perror(imgfile);
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Mychaela Falconia <falcon@freecalypso.org>
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28 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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29 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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30 fstat(fd, &st);
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Mychaela Falconia <falcon@freecalypso.org>
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31 if (!S_ISREG(st.st_mode)) {
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Mychaela Falconia <falcon@freecalypso.org>
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32 fprintf(stderr, "error: %s is not a regular file\n", imgfile);
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33 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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34 }
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Mychaela Falconia <falcon@freecalypso.org>
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35 if (st.st_size < imgfile_offset) {
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Mychaela Falconia <falcon@freecalypso.org>
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36 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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37 "error: offset given with -o exceeds the size of the file\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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38 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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39 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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40 if (st.st_size - imgfile_offset < total_ffs_size) {
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Mychaela Falconia <falcon@freecalypso.org>
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41 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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42 "error: %s is shorter than FFS size of 0x%lx bytes\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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43 imgfile, (u_long)total_ffs_size);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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44 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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45 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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46 image = mmap(NULL, total_ffs_size, PROT_READ, MAP_PRIVATE, fd,
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Mychaela Falconia <falcon@freecalypso.org>
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47 imgfile_offset);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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48 if (image == MAP_FAILED) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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49 perror("mmap");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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50 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
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51 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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52 close(fd);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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53 }
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54
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Mychaela Falconia <falcon@freecalypso.org>
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55 cmd_blkhdr()
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56 {
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57 int blk;
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Mychaela Falconia <falcon@freecalypso.org>
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58 u8 *blkhdr;
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59
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60 read_ffs_image();
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Mychaela Falconia <falcon@freecalypso.org>
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61 for (blk = 0; blk < total_blocks; blk++) {
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Mychaela Falconia <falcon@freecalypso.org>
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62 printf("Block %3d: ", blk);
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Mychaela Falconia <falcon@freecalypso.org>
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63 blkhdr = image + blk * eraseblk_size;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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64 if (bcmp(blkhdr, tiffs_header, sizeof tiffs_header)) {
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Mychaela Falconia <falcon@freecalypso.org>
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65 printf("No TIFFS header\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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66 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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67 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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68 printf("age %02X%02X, type/status %02X\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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69 blkhdr[7], blkhdr[6], blkhdr[8]);
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70 }
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71 exit(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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72 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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73
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Mychaela Falconia <falcon@freecalypso.org>
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74 find_inode_block()
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Mychaela Falconia <falcon@freecalypso.org>
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75 {
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Mychaela Falconia <falcon@freecalypso.org>
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76 int i, abcnt;
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Mychaela Falconia <falcon@freecalypso.org>
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77 u8 *ptr;
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Mychaela Falconia <falcon@freecalypso.org>
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78
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 if (index_blk_num >= 0) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 if (index_blk_num >= total_blocks) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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81 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
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82 "invalid block # given with the -a option\n");
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Mychaela Falconia <falcon@freecalypso.org>
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83 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 ptr = image + index_blk_num * eraseblk_size;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 if (bcmp(ptr, tiffs_header, sizeof tiffs_header)) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 "error: block specified with -a has no TIFFS header\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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89 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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90 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 if (ptr[8] != 0xAB) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 "error: block specified with -a is not an AB block\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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94 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 inode_block = ptr;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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98 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 abcnt = 0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 for (ptr = image, i = 0; i < total_blocks; i++, ptr += eraseblk_size) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 if (bcmp(ptr, tiffs_header, sizeof tiffs_header)) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 "warning: no TIFFS signature in erase block #%d (offset %x)\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 i, ptr - image);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 switch (ptr[8]) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 case 0xAB:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 if (verbose)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 "Found AB index in erase block #%d (offset %x)\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 i, ptr - image);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 index_blk_num = i;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 inode_block = ptr;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 abcnt++;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 case 0xBD:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 case 0xBF:
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 continue;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 "warning: unexpected block type/status %02X at offset %x\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 ptr[8], ptr - image);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 if (!inode_block) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 "error: could not find an active inode block in %s\n",
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 imgfile);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 if (abcnt > 1) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 "error: found more than one AB block; use -a\n");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 return(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 cmd_fsinfo()
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 read_ffs_image();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 find_inode_block();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 printf("Active inode block (AB) is block #%d\n", index_blk_num);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 alloc_inode_table();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 find_root_inode();
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 printf("Root inode is #%x\n", root_inode);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 if (validate_obj_name(root_inode, 1)) {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 printf("Root inode (format) name: %s\n",
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 inode_info[root_inode]->dataptr);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 exit(0);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 } else {
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 printf("No valid name found in the root inode!\n");
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 exit(1);
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
e7502631a0f9 initial import from freecalypso-sw rev 1033:5ab737ac3ad7
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 }