FreeCalypso > hg > freecalypso-reveng
annotate mpffs/common.c @ 56:fdfb57a1c5fe
Pirelli PCB tracing: voice band i/f, MCSI and MODEM UART
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Sun, 20 Oct 2013 04:49:28 +0000 |
parents | 9bc7f0e03fa8 |
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rev | line source |
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1 /* |
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2 * This module contains the code that will be common between mpffs-cat, |
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3 * mpffs-ls and mpffs-xtr. |
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4 */ |
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5 |
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6 #include <sys/types.h> |
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7 #include <sys/file.h> |
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8 #include <sys/stat.h> |
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9 #include <endian.h> |
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10 #include <ctype.h> |
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11 #include <stdio.h> |
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12 #include <string.h> |
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13 #include <strings.h> |
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14 #include <stdlib.h> |
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15 #include <unistd.h> |
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16 #include "types.h" |
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17 #include "struct.h" |
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18 |
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19 u8 mpffs_header[6] = {'F', 'f', 's', '#', 0x10, 0x02}; |
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20 u8 blank_flash_line[16] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
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21 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; |
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22 |
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23 char *imgfile; |
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24 u32 eraseblk_size; |
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25 int total_blocks; |
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26 u32 total_ffs_size; |
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27 u8 *image, *indexblk; |
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28 int index_blk_num = -1, root_node_no; |
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29 struct objinfo root; |
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30 int verbose; |
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31 |
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32 /* |
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33 * The following function is used to verify that the specified or computed |
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34 * flash erase block size is a power of 2. |
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35 */ |
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36 count_ones(word) |
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37 u32 word; |
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38 { |
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39 int count; |
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40 |
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41 for (count = 0; word; word >>= 1) |
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42 count += word & 1; |
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43 return count; |
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44 } |
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45 |
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46 eraseblk_size_reasonable() |
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47 { |
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48 if (count_ones(eraseblk_size) != 1 || eraseblk_size < 16384 || |
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49 eraseblk_size > 0x100000) { |
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50 fprintf(stderr, "0x%lx is an unreasonable erase block size\n", |
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51 (u_long) eraseblk_size); |
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52 exit(1); |
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53 } |
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54 } |
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55 |
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56 parse_cmdline_options(argc, argv) |
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57 char **argv; |
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58 { |
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59 extern char *optarg; |
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60 int c; |
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61 |
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62 while ((c = getopt(argc, argv, "a:e:mn:pr:v")) != EOF) |
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63 switch (c) { |
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64 case 'a': |
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65 index_blk_num = atoi(optarg); |
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66 continue; |
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67 case 'e': |
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68 eraseblk_size = strtoul(optarg, 0, 0); |
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69 eraseblk_size_reasonable(); |
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70 continue; |
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71 case 'm': /* "moko" */ |
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72 eraseblk_size = 0x10000; |
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73 total_blocks = 7; |
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74 continue; |
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75 case 'n': |
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76 total_blocks = atoi(optarg); |
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77 if (total_blocks < 1) { |
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78 fprintf(stderr, "invalid -n value\n"); |
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79 exit(1); |
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80 } |
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81 continue; |
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82 case 'p': /* Pirelli */ |
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83 eraseblk_size = 0x40000; |
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84 total_blocks = 18; |
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85 continue; |
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86 case 'r': |
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87 root_node_no = atoi(optarg); |
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88 continue; |
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89 case 'v': |
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90 verbose++; |
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91 continue; |
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92 default: |
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93 usage(); |
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94 exit(1); |
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95 } |
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96 |
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97 return(0); |
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98 } |
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99 |
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100 read_img_file() |
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101 { |
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102 int fd; |
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103 struct stat st; |
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104 |
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105 fd = open(imgfile, O_RDONLY); |
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106 if (fd < 0) { |
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107 perror(imgfile); |
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108 exit(1); |
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109 } |
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110 fstat(fd, &st); |
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111 if (!S_ISREG(st.st_mode)) { |
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112 fprintf(stderr, "%s is not a regular file\n", imgfile); |
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113 exit(1); |
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114 } |
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115 if (!eraseblk_size && !total_blocks) { |
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116 switch (st.st_size) { |
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117 case 0x70000: |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
118 /* assume Closedmoko */ |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
119 eraseblk_size = 0x10000; |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
120 total_blocks = 7; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
121 break; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
122 case 0x480000: |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
123 /* assume Pirelli */ |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
124 eraseblk_size = 0x40000; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
125 total_blocks = 18; |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
126 break; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
127 default: |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
128 noauto: fprintf(stderr, |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
129 "cannot intuit the flash parameters of %s: use -e and -n options\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
130 imgfile); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
131 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
132 } |
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mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
133 } else if (!total_blocks) { |
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mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
134 total_blocks = st.st_size / eraseblk_size; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
135 if (!total_blocks || total_blocks * eraseblk_size != st.st_size) |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
136 goto noauto; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
137 } else if (!eraseblk_size) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
138 if (total_blocks * 0x10000 == st.st_size) |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
139 eraseblk_size = 0x10000; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
140 else if (total_blocks * 0x40000 == st.st_size) |
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mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
141 eraseblk_size = 0x40000; |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
142 else |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
143 goto noauto; |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
144 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
145 total_ffs_size = eraseblk_size * total_blocks; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
146 if (st.st_size < total_ffs_size) { |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
147 fprintf(stderr, "%s has fewer than 0x%x bytes\n", imgfile, |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
148 total_ffs_size); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
149 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
150 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
151 image = malloc(total_ffs_size); |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
152 if (!image) { |
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mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
153 perror("malloc"); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
154 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
155 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
156 read(fd, image, total_ffs_size); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
157 close(fd); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
158 } |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
159 |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
160 find_index_block() |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
161 { |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
162 int i, abcnt; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
163 u8 *ptr; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
164 |
30
9c3c5a572b57
mpffs-ls works with the length code stubbed out
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
29
diff
changeset
|
165 if (index_blk_num >= 0) { |
9c3c5a572b57
mpffs-ls works with the length code stubbed out
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
29
diff
changeset
|
166 if (index_blk_num >= total_blocks) { |
29
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
167 fprintf(stderr, |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
168 "invalid block # given with the -a option\n"); |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
169 exit(1); |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
170 } |
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
171 ptr = image + index_blk_num * eraseblk_size; |
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mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
172 if (bcmp(ptr, mpffs_header, 6) || ptr[8] != 0xAB) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
173 fprintf(stderr, |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
174 "no MPFFS index found at the specified block #%d\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
175 index_blk_num); |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
176 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
177 } |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
178 indexblk = ptr; |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
179 return(0); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
180 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
181 abcnt = 0; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
182 for (ptr = image, i = 0; i < total_blocks; i++, ptr += eraseblk_size) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
183 if (bcmp(ptr, mpffs_header, 6)) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
184 fprintf(stderr, |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
185 "warning: no MPFFS signature in erase block #%d (offset %x)\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
186 i, ptr - image); |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
187 continue; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
188 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
189 switch (ptr[8]) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
190 case 0xAB: |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
191 if (verbose) |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
192 printf( |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
193 "Found AB index in erase block #%d (offset %x)\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
194 i, ptr - image); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
195 index_blk_num = i; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
196 indexblk = ptr; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
197 abcnt++; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
198 continue; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
199 case 0xBD: |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
200 case 0xBF: |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
201 continue; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
202 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
203 fprintf(stderr, |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
204 "warning: non-understood block type %02X at offset %x\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
205 ptr[8], ptr - image); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
206 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
207 if (!indexblk) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
208 fprintf(stderr, "could not find an MPFFS index block in %s\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
209 imgfile); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
210 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
211 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
212 if (abcnt > 1) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
213 fprintf(stderr, "found more than one AB block; use -a\n"); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
214 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
215 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
216 return(0); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
217 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
218 |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
219 get_index_entry(oi) |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
220 struct objinfo *oi; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
221 { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
222 struct mpffs_index *le; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
223 |
e96d6862cec0
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
224 if (oi->entryno >= (eraseblk_size >> 4)) { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
225 fprintf(stderr, |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
226 "error: index block pointer %x past the erase block size!\n", |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
227 oi->entryno); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
228 exit(1); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
229 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
230 le = (struct mpffs_index *) indexblk + oi->entryno; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
231 oi->idxrec = le; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
232 oi->len = le16toh(le->len); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
233 oi->type = le->type; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
234 oi->descend = le16toh(le->descend); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
235 oi->sibling = le16toh(le->sibling); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
236 return(0); |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
237 } |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
238 |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
239 validate_chunk(oi) |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
240 struct objinfo *oi; |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
241 { |
e96d6862cec0
mpffs-rdutils code started
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff
changeset
|
242 u32 dptr; |
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243 |
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244 if (oi->len & 0xF || !oi->len) { |
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245 fprintf(stderr, "index entry #%x: invalid chunk length\n", |
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246 oi->entryno); |
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247 exit(1); |
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|
248 } |
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249 dptr = le32toh(oi->idxrec->dataptr); |
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250 if (dptr > 0x0FFFFFFF) { |
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251 invdptr: fprintf(stderr, "index entry #%x: invalid data pointer\n", |
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252 oi->entryno); |
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253 exit(1); |
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254 } |
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255 dptr <<= 4; |
30
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256 if (dptr > total_ffs_size - oi->len) |
29
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257 goto invdptr; |
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258 oi->offset = dptr; |
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259 oi->dataptr = image + dptr; |
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260 return(0); |
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261 } |
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262 |
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263 validate_obj_name(oi) |
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264 struct objinfo *oi; |
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265 { |
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266 u8 *cp; |
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267 int cnt; |
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268 |
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269 for (cp = oi->dataptr, cnt = 0; ; cp++, cnt++) { |
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270 if (cnt >= oi->len) { |
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271 fprintf(stderr, |
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272 "object at index %x: name expected at %x: length overrun\n", |
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273 oi->entryno, oi->offset); |
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274 exit(1); |
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275 } |
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276 if (!*cp) |
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277 break; |
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278 if (*cp < '!' || *cp > '~') { |
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279 fprintf(stderr, |
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280 "object at index %x: name expected at %x: bad character\n", |
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281 oi->entryno, oi->offset); |
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282 exit(1); |
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283 } |
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284 } |
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285 if (!cnt) { |
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286 fprintf(stderr, |
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287 "object at index %x: name expected at %x: null string\n", |
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288 oi->entryno, oi->offset); |
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289 exit(1); |
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290 } |
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291 return(0); |
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292 } |
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293 |
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294 u8 * |
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295 find_end_of_chunk(ch) |
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296 struct objinfo *ch; |
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297 { |
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298 u8 *p; |
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299 int i; |
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300 |
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301 p = ch->dataptr + ch->len; |
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302 for (i = 1; i <= 16; i++) { |
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303 if (!p[-i]) |
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304 return(p - i); |
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305 if (p[-1] != 0xFF) |
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306 break; |
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|
307 } |
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308 fprintf(stderr, |
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309 "chunk starting at %x (index entry %x): no valid termination found\n", |
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|
310 ch->offset, ch->entryno); |
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311 exit(1); |
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312 } |
30
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313 |
31
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314 size_head_chunk(ch, chi) |
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315 struct objinfo *ch; |
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316 struct chunkinfo *chi; |
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|
317 { |
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318 chi->start = (u8 *) index((char *)ch->dataptr, '\0') + 1; |
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319 chi->end = find_end_of_chunk(ch); |
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320 if (chi->start >= chi->end) { |
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321 chi->len = 0; |
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|
322 return(0); |
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|
323 } else { |
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|
324 chi->len = chi->end - chi->start; |
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|
325 return(1); |
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|
326 } |
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|
327 } |
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|
328 |
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|
329 size_extra_chunk(ch, chi) |
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330 struct objinfo *ch; |
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|
331 struct chunkinfo *chi; |
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|
332 { |
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|
333 chi->start = ch->dataptr; |
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|
334 chi->end = find_end_of_chunk(ch); |
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|
335 chi->len = chi->end - chi->start; |
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|
336 } |
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diff
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|
337 |
39
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diff
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|
338 iterate_extra_chunks(first_extra_chunk, callback, callback_data) |
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|
339 void (*callback)(); |
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|
340 u_long callback_data; |
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341 { |
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|
342 int ent; |
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|
343 struct objinfo obj; |
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344 |
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|
345 for (ent = first_extra_chunk; ent != 0xFFFF; ent = obj.descend) { |
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|
346 loop: obj.entryno = ent; |
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|
347 get_index_entry(&obj); |
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|
348 switch (obj.type) { |
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|
349 case 0xF4: |
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|
350 validate_chunk(&obj); |
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|
351 callback(&obj, callback_data); |
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|
352 continue; |
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|
353 case 0x00: |
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|
354 if (obj.sibling == 0xFFFF) { |
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|
355 fprintf(stderr, |
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|
356 "file continuation object at index %x: marked deleted, but no sibling\n", |
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|
357 ent); |
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|
358 exit(1); |
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359 } |
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|
360 ent = obj.sibling; |
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|
361 goto loop; |
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362 default: |
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363 fprintf(stderr, |
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364 "file continuation object at index %x: unexpected type %02X\n", |
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365 ent, obj.type); |
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366 exit(1); |
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367 } |
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368 } |
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369 } |
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370 |
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371 find_root_node() |
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372 { |
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373 struct objinfo obj; |
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374 u16 lim; |
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375 |
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376 lim = (eraseblk_size >> 4) - 1; |
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377 if (root_node_no) { |
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378 if (root_node_no < 1 || root_node_no > lim) { |
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379 fprintf(stderr, |
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380 "root node # given with -r is invalid\n"); |
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381 exit(1); |
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382 } |
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383 return(1); |
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384 } |
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385 for (obj.entryno = 1; obj.entryno <= lim; obj.entryno++) { |
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386 get_index_entry(&obj); |
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387 if (!bcmp(obj.idxrec, blank_flash_line, 16)) |
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388 break; |
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389 if (obj.type != 0xF2) |
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390 continue; |
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391 validate_chunk(&obj); |
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392 validate_obj_name(&obj); |
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393 if (*obj.dataptr != '/') |
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394 continue; |
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395 root_node_no = obj.entryno; |
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396 if (verbose) |
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397 printf("Found root node at index #%x\n", root_node_no); |
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398 return(0); |
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399 } |
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400 fprintf(stderr, "error: no root node found (try -r)\n"); |
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401 exit(1); |
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402 } |
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403 |
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404 validate_root_node() |
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405 { |
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406 root.entryno = root_node_no; |
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407 get_index_entry(&root); |
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408 validate_chunk(&root); |
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409 validate_obj_name(&root); |
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410 if (verbose) |
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411 printf("Root node name: %s\n", (char *)root.dataptr); |
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412 if (root.type != 0xF2) { |
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413 fprintf(stderr, |
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414 "error: index entry #%x (expected root dir) is not a directory\n", |
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415 root_node_no); |
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416 exit(1); |
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417 } |
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418 if (root.sibling != 0xFFFF) |
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419 fprintf(stderr, |
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420 "warning: root entry has a non-nil sibling pointer\n"); |
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421 return(0); |
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422 } |
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423 |
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424 preliminaries() |
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425 { |
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426 read_img_file(); |
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427 find_index_block(); |
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428 find_root_node(); |
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429 validate_root_node(); |
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430 } |