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nvramtool: Use CMOS_SIZE for cmos size 

We write CMOS data to 128 byte files, which is a problem
when using them later-on (eg. as part of a coreboot image)
where nvramtool assumes them to be 256 byte, and so data
corruption occurs.

Change-Id: Ibc919c95f6d522866b21fd313ceb023e73d09fb9
Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Reviewed-on: http://review.coreboot.org/3186
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Patrick Georgi 2013-04-11 12:32:32 +02:00 committed by Stefan Reinauer
parent 2fde9668b4
commit a98d3061e9
1 changed files with 3 additions and 3 deletions
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6
util/nvramtool/cli/nvramtool.c
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@ -162,8 +162,8 @@ int main(int argc, char *argv[])
exit(1);
}
if (fd_stat.st_size < 128) {
lseek(fd, 127, SEEK_SET);
if (fd_stat.st_size < CMOS_SIZE) {
lseek(fd, CMOS_SIZE - 1, SEEK_SET);
if (write(fd, "\0", 1) != 1) {
fprintf(stderr, "Unable to extended '%s' to its full size.\n",
nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
@ -176,7 +176,7 @@ int main(int argc, char *argv[])
#endif
}
cmos_default = mmap(NULL, 128, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
cmos_default = mmap(NULL, CMOS_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (cmos_default == MAP_FAILED) {
fprintf(stderr, "Couldn't map '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
exit(1);