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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Based on mkimage.c.
- *
- * Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
- */
- #include "dumpimage.h"
- #include <image.h>
- #include <version.h>
- static void usage(void);
- /* parameters initialized by core will be used by the image type code */
- static struct image_tool_params params = {
- .type = IH_TYPE_KERNEL,
- };
- /*
- * dumpimage_extract_subimage -
- *
- * It scans all registered image types,
- * verifies image_header for each supported image type
- * if verification is successful, it extracts the desired file,
- * indexed by pflag, from the image
- *
- * returns negative if input image format does not match with any of
- * supported image types
- */
- static int dumpimage_extract_subimage(struct image_type_params *tparams,
- void *ptr, struct stat *sbuf)
- {
- int retval = -1;
- if (tparams->verify_header) {
- retval = tparams->verify_header((unsigned char *)ptr,
- sbuf->st_size, ¶ms);
- if (retval != 0) {
- fprintf(stderr, "%s: failed to verify header of %s\n",
- params.cmdname, tparams->name);
- return -1;
- }
- /*
- * Extract the file from the image
- * if verify is successful
- */
- if (tparams->extract_subimage) {
- retval = tparams->extract_subimage(ptr, ¶ms);
- if (retval != 0) {
- fprintf(stderr, "%s: extract_subimage failed for %s\n",
- params.cmdname, tparams->name);
- return -3;
- }
- } else {
- fprintf(stderr,
- "%s: extract_subimage undefined for %s\n",
- params.cmdname, tparams->name);
- return -2;
- }
- }
- return retval;
- }
- int main(int argc, char **argv)
- {
- int opt;
- int ifd = -1;
- struct stat sbuf;
- char *ptr;
- int retval = EXIT_SUCCESS;
- struct image_type_params *tparams = NULL;
- params.cmdname = *argv;
- while ((opt = getopt(argc, argv, "hlo:T:p:V")) != -1) {
- switch (opt) {
- case 'l':
- params.lflag = 1;
- break;
- case 'o':
- params.outfile = optarg;
- params.iflag = 1;
- break;
- case 'T':
- params.type = genimg_get_type_id(optarg);
- if (params.type < 0) {
- fprintf(stderr, "%s: Invalid type\n",
- params.cmdname);
- exit(EXIT_FAILURE);
- }
- break;
- case 'p':
- params.pflag = strtoul(optarg, &ptr, 10);
- if (*ptr) {
- fprintf(stderr,
- "%s: invalid file position %s\n",
- params.cmdname, *argv);
- exit(EXIT_FAILURE);
- }
- break;
- case 'V':
- printf("dumpimage version %s\n", PLAIN_VERSION);
- exit(EXIT_SUCCESS);
- case 'h':
- default:
- usage();
- break;
- }
- }
- if (argc < 2)
- usage();
- if (optind >= argc) {
- fprintf(stderr, "%s: image file missing\n", params.cmdname);
- exit(EXIT_FAILURE);
- }
- params.imagefile = argv[optind];
- /* set tparams as per input type_id */
- tparams = imagetool_get_type(params.type);
- if (tparams == NULL) {
- fprintf(stderr, "%s: unsupported type: %s\n",
- params.cmdname, genimg_get_type_name(params.type));
- exit(EXIT_FAILURE);
- }
- /*
- * check the passed arguments parameters meets the requirements
- * as per image type to be generated/listed
- */
- if (tparams->check_params) {
- if (tparams->check_params(¶ms)) {
- fprintf(stderr, "%s: Parameter check failed\n",
- params.cmdname);
- exit(EXIT_FAILURE);
- }
- }
- if (!params.lflag && !params.outfile) {
- fprintf(stderr, "%s: No output file provided\n",
- params.cmdname);
- exit(EXIT_FAILURE);
- }
- ifd = open(params.imagefile, O_RDONLY|O_BINARY);
- if (ifd < 0) {
- fprintf(stderr, "%s: Can't open \"%s\": %s\n", params.cmdname,
- params.imagefile, strerror(errno));
- exit(EXIT_FAILURE);
- }
- if (fstat(ifd, &sbuf) < 0) {
- fprintf(stderr, "%s: Can't stat \"%s\": %s\n", params.cmdname,
- params.imagefile, strerror(errno));
- exit(EXIT_FAILURE);
- }
- if ((uint32_t)sbuf.st_size < tparams->header_size) {
- fprintf(stderr, "%s: Bad size: \"%s\" is not valid image\n",
- params.cmdname, params.imagefile);
- exit(EXIT_FAILURE);
- }
- ptr = mmap(0, sbuf.st_size, PROT_READ, MAP_SHARED, ifd, 0);
- if (ptr == MAP_FAILED) {
- fprintf(stderr, "%s: Can't read \"%s\": %s\n", params.cmdname,
- params.imagefile, strerror(errno));
- exit(EXIT_FAILURE);
- }
- /*
- * Both calls bellow scan through dumpimage registry for all
- * supported image types and verify the input image file
- * header for match
- */
- if (params.iflag) {
- /*
- * Extract the data files from within the matched
- * image type. Returns the error code if not matched
- */
- retval = dumpimage_extract_subimage(tparams, ptr, &sbuf);
- if (retval)
- fprintf(stderr, "%s: Can't extract subimage from %s\n",
- params.cmdname, params.imagefile);
- } else {
- /*
- * Print the image information for matched image type
- * Returns the error code if not matched
- */
- retval = imagetool_verify_print_header(ptr, &sbuf, tparams,
- ¶ms);
- }
- (void)munmap((void *)ptr, sbuf.st_size);
- (void)close(ifd);
- return retval;
- }
- static void usage(void)
- {
- fprintf(stderr, "Usage: %s -l image\n"
- " -l ==> list image header information\n",
- params.cmdname);
- fprintf(stderr,
- " %s [-T type] [-p position] [-o outfile] image\n"
- " -T ==> declare image type as 'type'\n"
- " -p ==> 'position' (starting at 0) of the component to extract from image\n"
- " -o ==> extract component to file 'outfile'\n",
- params.cmdname);
- fprintf(stderr,
- " %s -h ==> print usage information and exit\n",
- params.cmdname);
- fprintf(stderr,
- " %s -V ==> print version information and exit\n",
- params.cmdname);
- exit(EXIT_SUCCESS);
- }
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