fit_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>
* FIT 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 fit_verify_header (unsigned char *ptr, int image_size,
struct image_tool_params *params)
{
return fdt_check_header(ptr);
}
static int fit_check_image_types (uint8_t type)
{
if (type == IH_TYPE_FLATDT)
return EXIT_SUCCESS;
else
return EXIT_FAILURE;
}
int mmap_fdt(struct image_tool_params *params, const char *fname, void **blobp,
struct stat *sbuf)
{
void *ptr;
int fd;
/* Load FIT blob into memory (we need to write hashes/signatures) */
fd = open(fname, O_RDWR | O_BINARY);
if (fd < 0) {
fprintf(stderr, "%s: Can't open %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
if (fstat(fd, sbuf) < 0) {
fprintf(stderr, "%s: Can't stat %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
ptr = mmap(0, sbuf->st_size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (ptr == MAP_FAILED) {
fprintf(stderr, "%s: Can't read %s: %s\n",
params->cmdname, fname, strerror(errno));
unlink(fname);
return -1;
}
/* check if ptr has a valid blob */
if (fdt_check_header(ptr)) {
fprintf(stderr, "%s: Invalid FIT blob\n", params->cmdname);
unlink(fname);
return -1;
}
*blobp = ptr;
return fd;
}
/**
* fit_handle_file - main FIT file processing function
*
* fit_handle_file() runs dtc to convert .its to .itb, includes
* binary data, updates timestamp property and calculates hashes.
*
* datafile - .its file
* imagefile - .itb file
*
* returns:
* only on success, otherwise calls exit (EXIT_FAILURE);
*/
static int fit_handle_file(struct image_tool_params *params)
{
char tmpfile[MKIMAGE_MAX_TMPFILE_LEN];
char cmd[MKIMAGE_MAX_DTC_CMDLINE_LEN];
int tfd, destfd = 0;
void *dest_blob = NULL;
struct stat sbuf;
void *ptr;
off_t destfd_size = 0;
/* Flattened Image Tree (FIT) format handling */
debug ("FIT format handling\n");
/* call dtc to include binary properties into the tmp file */
if (strlen (params->imagefile) +
strlen (MKIMAGE_TMPFILE_SUFFIX) + 1 > sizeof (tmpfile)) {
fprintf (stderr, "%s: Image file name (%s) too long, "
"can't create tmpfile",
params->imagefile, params->cmdname);
return (EXIT_FAILURE);
}
sprintf (tmpfile, "%s%s", params->imagefile, MKIMAGE_TMPFILE_SUFFIX);
/* We either compile the source file, or use the existing FIT image */
if (params->datafile) {
/* dtc -I dts -O dtb -p 500 datafile > tmpfile */
snprintf(cmd, sizeof(cmd), "%s %s %s > %s",
MKIMAGE_DTC, params->dtc, params->datafile, tmpfile);
debug("Trying to execute \"%s\"\n", cmd);
} else {
snprintf(cmd, sizeof(cmd), "cp %s %s",
params->imagefile, tmpfile);
}
if (system (cmd) == -1) {
fprintf (stderr, "%s: system(%s) failed: %s\n",
params->cmdname, cmd, strerror(errno));
goto err_system;
}
if (params->keydest) {
destfd = mmap_fdt(params, params->keydest, &dest_blob, &sbuf);
if (destfd < 0)
goto err_keydest;
destfd_size = sbuf.st_size;
}
tfd = mmap_fdt(params, tmpfile, &ptr, &sbuf);
if (tfd < 0)
goto err_mmap;
/* set hashes for images in the blob */
if (fit_add_verification_data(params->keydir,
dest_blob, ptr, params->comment,
params->require_keys)) {
fprintf(stderr, "%s Can't add hashes to FIT blob\n",
params->cmdname);
goto err_add_hashes;
}
/* for first image creation, add a timestamp at offset 0 i.e., root */
if (params->datafile && fit_set_timestamp(ptr, 0, sbuf.st_mtime)) {
fprintf (stderr, "%s: Can't add image timestamp\n",
params->cmdname);
goto err_add_timestamp;
}
debug ("Added timestamp successfully\n");
munmap ((void *)ptr, sbuf.st_size);
close (tfd);
if (dest_blob) {
munmap(dest_blob, destfd_size);
close(destfd);
}
if (rename (tmpfile, params->imagefile) == -1) {
fprintf (stderr, "%s: Can't rename %s to %s: %s\n",
params->cmdname, tmpfile, params->imagefile,
strerror (errno));
unlink (tmpfile);
unlink (params->imagefile);
return (EXIT_FAILURE);
}
return (EXIT_SUCCESS);
err_add_timestamp:
err_add_hashes:
munmap(ptr, sbuf.st_size);
err_mmap:
if (dest_blob)
munmap(dest_blob, destfd_size);
err_keydest:
err_system:
unlink(tmpfile);
return -1;
}
static int fit_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 struct image_type_params fitimage_params = {
.name = "FIT Image support",
.header_size = sizeof(image_header_t),
.hdr = (void*)&header,
.verify_header = fit_verify_header,
.print_header = fit_print_contents,
.check_image_type = fit_check_image_types,
.fflag_handle = fit_handle_file,
.set_header = NULL, /* FIT images use DTB header */
.check_params = fit_check_params,
};
void init_fit_image_type (void)
{
register_image_type(&fitimage_params);
}