1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/*
* (C) Copyright 2001
* Kyle Harris, kharris@nexus-tech.net
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* autoscript allows a remote host to download a command file and,
* optionally, binary data for automatically updating the target. For
* example, you create a new kernel image and want the user to be
* able to simply download the image and the machine does the rest.
* The kernel image is postprocessed with mkimage, which creates an
* image with a script file prepended. If enabled, autoscript will
* verify the script and contents of the download and execute the
* script portion. This would be responsible for erasing flash,
* copying the new image, and rebooting the machine.
*/
/* #define DEBUG */
#include <common.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <asm/byteorder.h>
#if defined(CONFIG_8xx)
#include <mpc8xx.h>
#endif
#ifdef CFG_HUSH_PARSER
#include <hush.h>
#endif
int
autoscript (ulong addr, const char *fit_uname)
{
ulong len;
image_header_t *hdr;
ulong *data;
char *cmd;
int rcode = 0;
int verify;
#if defined(CONFIG_FIT)
const void* fit_hdr;
int noffset;
const void *fit_data;
size_t fit_len;
#endif
verify = getenv_yesno ("verify");
switch (genimg_get_format ((void *)addr)) {
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *)addr;
if (!image_check_magic (hdr)) {
puts ("Bad magic number\n");
return 1;
}
if (!image_check_hcrc (hdr)) {
puts ("Bad header crc\n");
return 1;
}
if (verify) {
if (!image_check_dcrc (hdr)) {
puts ("Bad data crc\n");
return 1;
}
}
if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
puts ("Bad image type\n");
return 1;
}
/* get length of script */
data = (ulong *)image_get_data (hdr);
if ((len = uimage_to_cpu (*data)) == 0) {
puts ("Empty Script\n");
return 1;
}
/*
* scripts are just multi-image files with one component, seek
* past the zero-terminated sequence of image lengths to get
* to the actual image data
*/
while (*data++);
break;
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (fit_uname == NULL) {
puts ("No FIT subimage unit name\n");
return 1;
}
fit_hdr = (const void *)addr;
if (!fit_check_format (fit_hdr)) {
puts ("Bad FIT image format\n");
return 1;
}
/* get script component image node offset */
noffset = fit_image_get_node (fit_hdr, fit_uname);
if (noffset < 0) {
printf ("Can't find '%s' FIT subimage\n", fit_uname);
return 1;
}
if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) {
puts ("Not a image image\n");
return 1;
}
/* verify integrity */
if (verify) {
if (!fit_image_check_hashes (fit_hdr, noffset)) {
puts ("Bad Data Hash\n");
return 1;
}
}
/* get script subimage data address and length */
if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) {
puts ("Could not find script subimage data\n");
return 1;
}
data = (ulong *)fit_data;
len = (ulong)fit_len;
break;
#endif
default:
puts ("Wrong image format for autoscript\n");
return 1;
}
debug ("** Script length: %ld\n", len);
if ((cmd = malloc (len + 1)) == NULL) {
return 1;
}
/* make sure cmd is null terminated */
memmove (cmd, (char *)data, len);
*(cmd + len) = 0;
#ifdef CFG_HUSH_PARSER /*?? */
rcode = parse_string_outer (cmd, FLAG_PARSE_SEMICOLON);
#else
{
char *line = cmd;
char *next = cmd;
/*
* break into individual lines,
* and execute each line;
* terminate on error.
*/
while (*next) {
if (*next == '\n') {
*next = '\0';
/* run only non-empty commands */
if ((next - line) > 1) {
debug ("** exec: \"%s\"\n",
line);
if (run_command (line, 0) < 0) {
rcode = 1;
break;
}
}
line = next + 1;
}
++next;
}
}
#endif
free (cmd);
return rcode;
}
/**************************************************/
#if defined(CONFIG_CMD_AUTOSCRIPT)
int
do_autoscript (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
ulong addr;
int rcode;
const char *fit_uname = NULL;
/* Find script image */
if (argc < 2) {
addr = CFG_LOAD_ADDR;
debug ("* autoscr: default load address = 0x%08lx\n", addr);
#if defined(CONFIG_FIT)
} else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) {
debug ("* autoscr: subimage '%s' from FIT image at 0x%08lx\n",
fit_uname, addr);
#endif
} else {
addr = simple_strtoul(argv[1], NULL, 16);
debug ("* autoscr: cmdline image address = 0x%08lx\n", addr);
}
printf ("## Executing script at %08lx\n", addr);
rcode = autoscript (addr, fit_uname);
return rcode;
}
U_BOOT_CMD(
autoscr, 2, 0, do_autoscript,
"autoscr - run script from memory\n",
"[addr] - run script starting at addr"
" - A valid autoscr header must be present\n"
#if defined(CONFIG_FIT)
"For FIT format uImage addr must include subimage\n"
"unit name in the form of addr:<subimg_uname>\n"
#endif
);
#endif
|