/* * (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 <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) { fprintf(stderr, "%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) { fprintf(stderr, "%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) { fprintf(stderr, "%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_save_datafile(struct image_tool_params *params, ulong file_data, ulong file_len) { int dfd; const char *datafile = params->outfile; dfd = open(datafile, O_RDWR | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR); if (dfd < 0) { fprintf(stderr, "%s: Can't open \"%s\": %s\n", params->cmdname, datafile, strerror(errno)); return -1; } if (write(dfd, (void *)file_data, file_len) != (ssize_t)file_len) { fprintf(stderr, "%s: Write error on \"%s\": %s\n", params->cmdname, datafile, strerror(errno)); close(dfd); return -1; } close(dfd); return 0; } static int image_extract_datafile(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 image_save_datafile(params, file_data, file_len); } /* * Default image type parameters definition */ static struct image_type_params defimage_params = { .name = "Default Image support", .header_size = sizeof(image_header_t), .hdr = (void*)&header, .check_image_type = image_check_image_types, .verify_header = image_verify_header, .print_header = image_print_contents, .set_header = image_set_header, .extract_datafile = image_extract_datafile, .check_params = image_check_params, }; void init_default_image_type(void) { register_image_type(&defimage_params); }