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 ); 181