default_image.c
4.12 KB
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
/*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2004
* DENX Software Engineering
* Wolfgang Denk, wd@denx.de
*
* Updated-by: Prafulla Wadaskar <prafulla@marvell.com>
* default_image specific code abstracted from mkimage.c
* some functions added to address abstraction
*
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "imagetool.h"
#include "mkimage.h"
#include <image.h>
#include <u-boot/crc.h>
static image_header_t header;
static int image_check_image_types(uint8_t type)
{
if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) ||
(type == IH_TYPE_KERNEL_NOLOAD))
return EXIT_SUCCESS;
else
return EXIT_FAILURE;
}
static int image_check_params(struct image_tool_params *params)
{
return ((params->dflag && (params->fflag || params->lflag)) ||
(params->fflag && (params->dflag || params->lflag)) ||
(params->lflag && (params->dflag || params->fflag)));
}
static int image_verify_header(unsigned char *ptr, int image_size,
struct image_tool_params *params)
{
uint32_t len;
const unsigned char *data;
uint32_t checksum;
image_header_t header;
image_header_t *hdr = &header;
/*
* create copy of header so that we can blank out the
* checksum field for checking - this can't be done
* on the PROT_READ mapped data.
*/
memcpy(hdr, ptr, sizeof(image_header_t));
if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) {
debug("%s: Bad Magic Number: \"%s\" is no valid image\n",
params->cmdname, params->imagefile);
return -FDT_ERR_BADMAGIC;
}
data = (const unsigned char *)hdr;
len = sizeof(image_header_t);
checksum = be32_to_cpu(hdr->ih_hcrc);
hdr->ih_hcrc = cpu_to_be32(0); /* clear for re-calculation */
if (crc32(0, data, len) != checksum) {
debug("%s: ERROR: \"%s\" has bad header checksum!\n",
params->cmdname, params->imagefile);
return -FDT_ERR_BADSTATE;
}
data = (const unsigned char *)ptr + sizeof(image_header_t);
len = image_size - sizeof(image_header_t) ;
checksum = be32_to_cpu(hdr->ih_dcrc);
if (crc32(0, data, len) != checksum) {
debug("%s: ERROR: \"%s\" has corrupted data!\n",
params->cmdname, params->imagefile);
return -FDT_ERR_BADSTRUCTURE;
}
return 0;
}
static void image_set_header(void *ptr, struct stat *sbuf, int ifd,
struct image_tool_params *params)
{
uint32_t checksum;
image_header_t * hdr = (image_header_t *)ptr;
checksum = crc32(0,
(const unsigned char *)(ptr +
sizeof(image_header_t)),
sbuf->st_size - sizeof(image_header_t));
/* Build new header */
image_set_magic(hdr, IH_MAGIC);
image_set_time(hdr, sbuf->st_mtime);
image_set_size(hdr, sbuf->st_size - sizeof(image_header_t));
image_set_load(hdr, params->addr);
image_set_ep(hdr, params->ep);
image_set_dcrc(hdr, checksum);
image_set_os(hdr, params->os);
image_set_arch(hdr, params->arch);
image_set_type(hdr, params->type);
image_set_comp(hdr, params->comp);
image_set_name(hdr, params->imagename);
checksum = crc32(0, (const unsigned char *)hdr,
sizeof(image_header_t));
image_set_hcrc(hdr, checksum);
}
static int image_extract_subimage(void *ptr, struct image_tool_params *params)
{
const image_header_t *hdr = (const image_header_t *)ptr;
ulong file_data;
ulong file_len;
if (image_check_type(hdr, IH_TYPE_MULTI)) {
ulong idx = params->pflag;
ulong count;
/* get the number of data files present in the image */
count = image_multi_count(hdr);
/* retrieve the "data file" at the idx position */
image_multi_getimg(hdr, idx, &file_data, &file_len);
if ((file_len == 0) || (idx >= count)) {
fprintf(stderr, "%s: No such data file %ld in \"%s\"\n",
params->cmdname, idx, params->imagefile);
return -1;
}
} else {
file_data = image_get_data(hdr);
file_len = image_get_size(hdr);
}
/* save the "data file" into the file system */
return imagetool_save_subimage(params->outfile, file_data, file_len);
}
/*
* Default image type parameters definition
*/
U_BOOT_IMAGE_TYPE(
defimage,
"Default Image support",
sizeof(image_header_t),
(void *)&header,
image_check_params,
image_verify_header,
image_print_contents,
image_set_header,
image_extract_subimage,
image_check_image_types,
NULL,
NULL
);