diff options
Diffstat (limited to 'tools/firmware-utils/src')
| -rw-r--r-- | tools/firmware-utils/src/jcgimage.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/tools/firmware-utils/src/jcgimage.c b/tools/firmware-utils/src/jcgimage.c index 06fbb9f03e..81d9f79f52 100644 --- a/tools/firmware-utils/src/jcgimage.c +++ b/tools/firmware-utils/src/jcgimage.c @@ -2,6 +2,7 @@ * jcgimage - Create a JCG firmware image * * Copyright (C) 2015 Reinhard Max <reinhard@m4x.de> + * Copyright (C) 2019 Davide Fioravanti <pantanastyle@gmail.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -45,6 +46,11 @@ * requiring JTAG to revive the board. To prevent such bricking from * happening, this tool refuses to build such overlong images. * + * Using -m is possible to set the maximum size of the payload. + * Otherwise the default MAXSIZE will be used. + * For an 8Mb flash, the corresponding maxsize is: + * 8 * 1024 * 1024 - 5 * 64 * 1024 = 8388608 - 327680 = 8060928 + * * Two more conditions have to be met for a JCG image to be accepted * as a valid update by the web interface of the stock firware: * @@ -92,6 +98,7 @@ #include <sys/mman.h> #include <arpa/inet.h> #include <assert.h> +#include <inttypes.h> /* * JCG Firmware image header @@ -292,8 +299,8 @@ craftcrc(uint32_t dcrc, uint8_t *buf, size_t len) void usage() { fprintf(stderr, "Usage:\n" - "jcgimage -o outfile -u uImage [-v version]\n" - "jcgimage -o outfile -k kernel -f rootfs [-v version]\n"); + "jcgimage -o outfile -u uImage [-m maxsize] [-v version]\n" + "jcgimage -o outfile -k kernel -f rootfs [-m maxsize] [-v version]\n"); exit(1); } @@ -314,6 +321,8 @@ main(int argc, char **argv) char *file1 = NULL; char *file2 = NULL; char *version = NULL; + size_t maxsize = MAXSIZE; + char *endptr; int mode = MODE_UNKNOWN; int fdo, fd1, fd2; size_t size1, size2, sizeu, sizeo, off1, off2; @@ -324,7 +333,7 @@ main(int argc, char **argv) assert(sizeof(struct uimage_header) == 64); set_source_date_epoch(); - while ((c = getopt(argc, argv, "o:k:f:u:v:h")) != -1) { + while ((c = getopt(argc, argv, "o:k:f:u:v:m:h")) != -1) { switch (c) { case 'o': imagefile = optarg; @@ -350,6 +359,11 @@ main(int argc, char **argv) mode = MODE_UIMAGE; file1 = optarg; break; + case 'm': + if (optarg != NULL) + maxsize = strtoimax(optarg, &endptr, 10); + + break; case 'v': version = optarg; break; @@ -385,8 +399,8 @@ main(int argc, char **argv) sizeo = sizeof(*jh) + sizeu; } - if (sizeo > MAXSIZE) - errx(1, "payload too large: %zd > %zd\n", sizeo, MAXSIZE); + if (sizeo > maxsize) + errx(1, "payload too large: %zd > %zd\n", sizeo, maxsize); fdo = open(imagefile, O_RDWR | O_CREAT | O_TRUNC, 00644); |