allow calculationg checksums of files
This commit is contained in:
Sascha Hauer
parent
4b0ac7ecf7
commit
7c809ab519
171
commands/crc.c
171
commands/crc.c
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@ -1,107 +1,100 @@
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#include <common.h>
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#include <command.h>
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#include <fs.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <xfuncs.h>
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#include <malloc.h>
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#include <linux/ctype.h>
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#ifndef CONFIG_CRC32_VERIFY
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int do_mem_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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int do_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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ulong addr, length;
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ulong crc;
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ulong *ptr;
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ulong start = 0, size = ~0, total = 0, now;
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ulong crc = 0, vcrc = 0;
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char *filename = "/dev/mem";
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char *buf;
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int fd, opt, err = 0, filegiven = 0, verify = 0;
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if (argc < 3) {
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printf ("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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getopt_reset();
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addr = simple_strtoul (argv[1], NULL, 16);
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length = simple_strtoul (argv[2], NULL, 16);
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crc = crc32 (0, (const uchar *) addr, length);
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printf ("CRC32 for %08lx ... %08lx ==> %08lx\n",
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addr, addr + length - 1, crc);
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if (argc > 3) {
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ptr = (ulong *) simple_strtoul (argv[3], NULL, 16);
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*ptr = crc;
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}
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return 0;
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}
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#else /* CONFIG_CRC32_VERIFY */
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int do_mem_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
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{
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ulong addr, length;
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ulong crc;
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ulong *ptr;
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ulong vcrc;
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int verify;
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int ac;
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char **av;
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if (argc < 3) {
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usage:
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printf ("Usage:\n%s\n", cmdtp->usage);
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return 1;
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}
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av = argv + 1;
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ac = argc - 1;
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if (strcmp(*av, "-v") == 0) {
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verify = 1;
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av++;
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ac--;
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if (ac < 3)
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goto usage;
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} else
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verify = 0;
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addr = simple_strtoul(*av++, NULL, 16);
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length = simple_strtoul(*av++, NULL, 16);
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crc = crc32(0, (const uchar *) addr, length);
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if (!verify) {
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printf ("CRC32 for %08lx ... %08lx ==> %08lx\n",
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addr, addr + length - 1, crc);
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if (ac > 2) {
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ptr = (ulong *) simple_strtoul (*av++, NULL, 16);
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*ptr = crc;
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while((opt = getopt(argc, argv, "f:v:")) > 0) {
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switch(opt) {
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case 'f':
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filename = optarg;
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filegiven = 1;
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break;
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case 'v':
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verify = 1;
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vcrc = simple_strtoul(optarg, NULL, 0);
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break;
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}
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} else {
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vcrc = simple_strtoul(*av++, NULL, 16);
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if (vcrc != crc) {
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printf ("CRC32 for %08lx ... %08lx ==> %08lx != %08lx ** ERROR **\n",
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addr, addr + length - 1, crc, vcrc);
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}
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if (!filegiven && optind == argc) {
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u_boot_cmd_usage(cmdtp);
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return 1;
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}
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if (optind < argc) {
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if (parse_area_spec(argv[optind], &start, &size)) {
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printf("could not parse area description: %s\n", argv[optind]);
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return 1;
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}
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}
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return 0;
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fd = open(filename, O_RDONLY);
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if (fd < 0) {
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printf("open %s: %s\n", filename, errno_str());
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return 1;
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}
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if (lseek(fd, start, SEEK_SET) < 0) {
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printf("file is smaller than start address\n");
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err = 1;
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goto out;
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}
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buf = xmalloc(4096);
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while (size) {
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now = min((ulong)4096, size);
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now = read(fd, buf, now);
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if (!now)
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break;
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crc = crc32(crc, buf, now);
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size -= now;
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total += now;
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}
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printf ("CRC32 for %s 0x%08lx ... 0x%08lx ==> 0x%08lx",
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filename, start, start + total - 1, crc);
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if (verify && crc != vcrc) {
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printf(" != 0x%08x ** ERROR **", vcrc);
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err = 1;
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}
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printf("\n");
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free(buf);
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out:
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close(fd);
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return err;
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}
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#endif /* CONFIG_CRC32_VERIFY */
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#ifndef CONFIG_CRC32_VERIFY
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static __maybe_unused char cmd_crc_help[] =
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"Usage: crc32 [OPTION] [AREA]\n"
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"Calculate a crc32 checksum of a memory area\n"
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"Options:\n"
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" -f <file> Use file instead of memory\n"
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" -v <crc> Verfify\n";
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U_BOOT_CMD_START(crc32)
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.maxargs = 4,
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.cmd = do_mem_crc,
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.usage = "checksum calculation",
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U_BOOT_CMD_HELP("address count [addr]\n - compute CRC32 checksum [save at addr]\n")
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.maxargs = CONFIG_MAXARGS,
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.cmd = do_crc,
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.usage = "crc32 checksum calculation",
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U_BOOT_CMD_HELP(cmd_crc_help)
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U_BOOT_CMD_END
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#else /* CONFIG_CRC32_VERIFY */
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U_BOOT_CMD(
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crc32, 5, 0, do_mem_crc,
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"crc32 - checksum calculation\n",
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"address count [addr]\n - compute CRC32 checksum [save at addr]\n"
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"-v address count crc\n - verify crc of memory area\n"
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);
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#endif /* CONFIG_CRC32_VERIFY */
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