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1 | /* | |
2 | * (C) Copyright 2008 Semihalf | |
3 | * | |
4 | * (C) Copyright 2000-2004 | |
5 | * DENX Software Engineering | |
6 | * Wolfgang Denk, wd@denx.de | |
7 | * | |
8 | * Updated-by: Prafulla Wadaskar <prafulla@marvell.com> | |
9 | * default_image specific code abstracted from mkimage.c | |
10 | * some functions added to address abstraction | |
11 | * | |
12 | * All rights reserved. | |
13 | * | |
14 | * SPDX-License-Identifier: GPL-2.0+ | |
15 | */ | |
16 | ||
17 | #include "imagetool.h" | |
18 | #include "mkimage.h" | |
19 | ||
20 | #include <image.h> | |
21 | #include <u-boot/crc.h> | |
22 | ||
23 | static image_header_t header; | |
24 | ||
25 | static int image_check_image_types(uint8_t type) | |
26 | { | |
27 | if (((type > IH_TYPE_INVALID) && (type < IH_TYPE_FLATDT)) || | |
28 | (type == IH_TYPE_KERNEL_NOLOAD)) | |
29 | return EXIT_SUCCESS; | |
30 | else | |
31 | return EXIT_FAILURE; | |
32 | } | |
33 | ||
34 | static int image_check_params(struct image_tool_params *params) | |
35 | { | |
36 | return ((params->dflag && (params->fflag || params->lflag)) || | |
37 | (params->fflag && (params->dflag || params->lflag)) || | |
38 | (params->lflag && (params->dflag || params->fflag))); | |
39 | } | |
40 | ||
41 | static int image_verify_header(unsigned char *ptr, int image_size, | |
42 | struct image_tool_params *params) | |
43 | { | |
44 | uint32_t len; | |
45 | const unsigned char *data; | |
46 | uint32_t checksum; | |
47 | image_header_t header; | |
48 | image_header_t *hdr = &header; | |
49 | ||
50 | /* | |
51 | * create copy of header so that we can blank out the | |
52 | * checksum field for checking - this can't be done | |
53 | * on the PROT_READ mapped data. | |
54 | */ | |
55 | memcpy(hdr, ptr, sizeof(image_header_t)); | |
56 | ||
57 | if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) { | |
58 | debug("%s: Bad Magic Number: \"%s\" is no valid image\n", | |
59 | params->cmdname, params->imagefile); | |
60 | return -FDT_ERR_BADMAGIC; | |
61 | } | |
62 | ||
63 | data = (const unsigned char *)hdr; | |
64 | len = sizeof(image_header_t); | |
65 | ||
66 | checksum = be32_to_cpu(hdr->ih_hcrc); | |
67 | hdr->ih_hcrc = cpu_to_be32(0); /* clear for re-calculation */ | |
68 | ||
69 | if (crc32(0, data, len) != checksum) { | |
70 | debug("%s: ERROR: \"%s\" has bad header checksum!\n", | |
71 | params->cmdname, params->imagefile); | |
72 | return -FDT_ERR_BADSTATE; | |
73 | } | |
74 | ||
75 | data = (const unsigned char *)ptr + sizeof(image_header_t); | |
76 | len = image_size - sizeof(image_header_t) ; | |
77 | ||
78 | checksum = be32_to_cpu(hdr->ih_dcrc); | |
79 | if (crc32(0, data, len) != checksum) { | |
80 | debug("%s: ERROR: \"%s\" has corrupted data!\n", | |
81 | params->cmdname, params->imagefile); | |
82 | return -FDT_ERR_BADSTRUCTURE; | |
83 | } | |
84 | return 0; | |
85 | } | |
86 | ||
87 | static void image_set_header(void *ptr, struct stat *sbuf, int ifd, | |
88 | struct image_tool_params *params) | |
89 | { | |
90 | uint32_t checksum; | |
91 | char *source_date_epoch; | |
92 | time_t time; | |
93 | ||
94 | image_header_t * hdr = (image_header_t *)ptr; | |
95 | ||
96 | checksum = crc32(0, | |
97 | (const unsigned char *)(ptr + | |
98 | sizeof(image_header_t)), | |
99 | sbuf->st_size - sizeof(image_header_t)); | |
100 | ||
101 | source_date_epoch = getenv("SOURCE_DATE_EPOCH"); | |
102 | if (source_date_epoch != NULL) { | |
103 | time = (time_t) strtol(source_date_epoch, NULL, 10); | |
104 | ||
105 | if (gmtime(&time) == NULL) { | |
106 | fprintf(stderr, "%s: SOURCE_DATE_EPOCH is not valid\n", | |
107 | __func__); | |
108 | time = 0; | |
109 | } | |
110 | } else { | |
111 | time = sbuf->st_mtime; | |
112 | } | |
113 | ||
114 | /* Build new header */ | |
115 | image_set_magic(hdr, IH_MAGIC); | |
116 | image_set_time(hdr, time); | |
117 | image_set_size(hdr, sbuf->st_size - sizeof(image_header_t)); | |
118 | image_set_load(hdr, params->addr); | |
119 | image_set_ep(hdr, params->ep); | |
120 | image_set_dcrc(hdr, checksum); | |
121 | image_set_os(hdr, params->os); | |
122 | image_set_arch(hdr, params->arch); | |
123 | image_set_type(hdr, params->type); | |
124 | image_set_comp(hdr, params->comp); | |
125 | ||
126 | image_set_name(hdr, params->imagename); | |
127 | ||
128 | checksum = crc32(0, (const unsigned char *)hdr, | |
129 | sizeof(image_header_t)); | |
130 | ||
131 | image_set_hcrc(hdr, checksum); | |
132 | } | |
133 | ||
134 | static int image_extract_subimage(void *ptr, struct image_tool_params *params) | |
135 | { | |
136 | const image_header_t *hdr = (const image_header_t *)ptr; | |
137 | ulong file_data; | |
138 | ulong file_len; | |
139 | ||
140 | if (image_check_type(hdr, IH_TYPE_MULTI)) { | |
141 | ulong idx = params->pflag; | |
142 | ulong count; | |
143 | ||
144 | /* get the number of data files present in the image */ | |
145 | count = image_multi_count(hdr); | |
146 | ||
147 | /* retrieve the "data file" at the idx position */ | |
148 | image_multi_getimg(hdr, idx, &file_data, &file_len); | |
149 | ||
150 | if ((file_len == 0) || (idx >= count)) { | |
151 | fprintf(stderr, "%s: No such data file %ld in \"%s\"\n", | |
152 | params->cmdname, idx, params->imagefile); | |
153 | return -1; | |
154 | } | |
155 | } else { | |
156 | file_data = image_get_data(hdr); | |
157 | file_len = image_get_size(hdr); | |
158 | } | |
159 | ||
160 | /* save the "data file" into the file system */ | |
161 | return imagetool_save_subimage(params->outfile, file_data, file_len); | |
162 | } | |
163 | ||
164 | /* | |
165 | * Default image type parameters definition | |
166 | */ | |
167 | U_BOOT_IMAGE_TYPE( | |
168 | defimage, | |
169 | "Default Image support", | |
170 | sizeof(image_header_t), | |
171 | (void *)&header, | |
172 | image_check_params, | |
173 | image_verify_header, | |
174 | image_print_contents, | |
175 | image_set_header, | |
176 | image_extract_subimage, | |
177 | image_check_image_types, | |
178 | NULL, | |
179 | NULL | |
180 | ); |