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util/cbfstool: Add "truncate" command

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It does the opposite to "expand", removing a trailing empty file from
CBFS. It also returns the size of the CBFS post processing on stdout.

BUG=b:65853903
BRANCH=none
TEST=`cbfstool test.bin truncate -r FW_MAIN_A` removes the trailing
empty file in FW_MAIN_A. Without a trailing empty file, the region is
left alone (tested using COREBOOT which comes with a master header
pointer).

Change-Id: I0c747090813898539f3428936afa9d8459adee9c
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/21608
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
This commit is contained in:
Patrick Georgi
2017-09-20 11:59:18 +02:00
parent d6c0af6c54
commit 12631a4d1d
3 changed files with 63 additions and 0 deletions
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20
util/cbfstool/cbfstool.c
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@@ -1121,6 +1121,23 @@ static int cbfs_expand(void)
return cbfs_expand_to_region(param.image_region);
}
static int cbfs_truncate(void)
{
struct buffer src_buf;
/* Obtain the source region. */
if (!partitioned_file_read_region(&src_buf, param.image_file,
param.region_name)) {
ERROR("Region not found in image: %s\n", param.source_region);
return 1;
}
uint32_t size;
int result = cbfs_truncate_space(param.image_region, &size);
printf("0x%x\n", size);
return result;
}
static const struct command commands[] = {
{"add", "H:r:f:n:t:c:b:a:yvA:gh?", cbfs_add, true, true},
{"add-flat-binary", "H:r:f:n:l:e:c:b:vA:gh?", cbfs_add_flat_binary,
@@ -1142,6 +1159,7 @@ static const struct command commands[] = {
{"update-fit", "H:r:n:x:vh?", cbfs_update_fit, true, true},
{"write", "r:f:i:Fudvh?", cbfs_write, true, true},
{"expand", "r:h?", cbfs_expand, true, true},
{"truncate", "r:h?", cbfs_truncate, true, true},
};
static struct option long_options[] = {
@@ -1291,6 +1309,8 @@ static void usage(char *name)
"Write file into same-size [or larger] raw region\n"
" read [-r fmap-region] -f file "
"Extract raw region contents into binary file\n"
" truncate [-r fmap-region] "
"Truncate CBFS and print new size on stdout\n"
" expand [-r fmap-region] "
"Expand CBFS to span entire region\n"
" update-fit [-r image,regions] -n MICROCODE_BLOB_NAME \\\n"