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Don't crash if the CROM is all zeros.

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This commit is contained in:
Doug Rabson 2004-05-23 10:06:33 +00:00
parent 9a6a20eeff
commit 3d7b1b4143
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=129604
1 changed files with 4 additions and 0 deletions
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4
usr.sbin/fwcontrol/fwcontrol.c
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@ -326,6 +326,10 @@ show_crom(u_int32_t *crom_buf)
crom_init_context(&cc, crom_buf);
dir = cc.stack[0].dir;
if (!dir) {
printf("no root directory - giving up\n");
return;
}
printf("root_directory: len=0x%04x(%d) crc=0x%04x",
dir->crc_len, dir->crc_len, dir->crc);
crc = crom_crc((u_int32_t *)&dir->entry[0], dir->crc_len);