default_image.c
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/*
* (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);
}