Extend mkimage with a new optional option -M to specify a special U-Boot image magic number. OpenWrt ships images for about 30 different boards with vendor boot loaders which are expecting the mkimage format, but with a different image magic.
OpenWrt includes this patch for mkimage more than 10 years. It was added by Gabor Juhos in this commit: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commitdiff;h=f3d2056b81b7a92d28402c22736534d84fe23cfe Cc: Gabor Juhos <j4g...@gmail.com> Signed-off-by: Hauke Mehrtens <ha...@hauke-m.de> --- tools/default_image.c | 4 ++-- tools/imagetool.h | 1 + tools/mkimage.c | 14 ++++++++++++-- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/tools/default_image.c b/tools/default_image.c index 0ac3382003..514edf05a5 100644 --- a/tools/default_image.c +++ b/tools/default_image.c @@ -57,7 +57,7 @@ static int image_verify_header(unsigned char *ptr, int image_size, */ memcpy(hdr, ptr, sizeof(struct legacy_img_hdr)); - if (be32_to_cpu(hdr->ih_magic) != IH_MAGIC) { + if (be32_to_cpu(hdr->ih_magic) != params->magic) { debug("%s: Bad Magic Number: \"%s\" is no valid image\n", params->cmdname, params->imagefile); return -FDT_ERR_BADMAGIC; @@ -126,7 +126,7 @@ static void image_set_header(void *ptr, struct stat *sbuf, int ifd, } /* Build new header */ - image_set_magic(hdr, IH_MAGIC); + image_set_magic(hdr, params->magic); image_set_time(hdr, time); image_set_size(hdr, imagesize); image_set_load(hdr, addr); diff --git a/tools/imagetool.h b/tools/imagetool.h index ca7c2e48ba..5e61228a5f 100644 --- a/tools/imagetool.h +++ b/tools/imagetool.h @@ -59,6 +59,7 @@ struct image_tool_params { int arch; int type; int comp; + unsigned int magic; char *dtc; unsigned int addr; unsigned int ep; diff --git a/tools/mkimage.c b/tools/mkimage.c index 8306861ce5..957abe115c 100644 --- a/tools/mkimage.c +++ b/tools/mkimage.c @@ -26,6 +26,7 @@ static struct image_tool_params params = { .arch = IH_ARCH_PPC, .type = IH_TYPE_KERNEL, .comp = IH_COMP_GZIP, + .magic = IH_MAGIC, .dtc = MKIMAGE_DEFAULT_DTC_OPTIONS, .imagename = "", .imagename2 = "", @@ -89,11 +90,12 @@ static void usage(const char *msg) " -q ==> quiet\n", params.cmdname); fprintf(stderr, - " %s [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image\n" + " %s [-x] -A arch -O os -T type -C comp -M magic -a addr -e ep -n name -d data_file[:data_file...] image\n" " -A ==> set architecture to 'arch'\n" " -O ==> set operating system to 'os'\n" " -T ==> set image type to 'type'\n" " -C ==> set compression type 'comp'\n" + " -M ==> set image magic to 'magic' (hex)\n" " -a ==> set load address to 'addr' (hex)\n" " -e ==> set entry point to 'ep' (hex)\n" " -n ==> set image name to 'name'\n" @@ -159,7 +161,7 @@ static int add_content(int type, const char *fname) } static const char optstring[] = - "a:A:b:B:c:C:d:D:e:Ef:Fg:G:i:k:K:ln:N:o:O:p:qrR:stT:vVx"; + "a:A:b:B:c:C:d:D:e:Ef:Fg:G:i:k:K:lM:n:N:o:O:p:qrR:stT:vVx"; static const struct option longopts[] = { { "load-address", required_argument, NULL, 'a' }, @@ -298,6 +300,14 @@ static void process_args(int argc, char **argv) case 'l': params.lflag = 1; break; + case 'M': + params.magic = strtoull(optarg, &ptr, 16); + if (*ptr) { + fprintf(stderr, "%s: invalid magic %s\n", + params.cmdname, optarg); + exit(EXIT_FAILURE); + } + break; case 'n': params.imagename = optarg; break; -- 2.39.0
