From 12631a4d1d1c2e06b3a2c53b884cf6c33000b9b9 Mon Sep 17 00:00:00 2001 From: Patrick Georgi Date: Wed, 20 Sep 2017 11:59:18 +0200 Subject: util/cbfstool: Add "truncate" command 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 Reviewed-on: https://review.coreboot.org/21608 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin --- util/cbfstool/cbfstool.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'util/cbfstool/cbfstool.c') diff --git a/util/cbfstool/cbfstool.c b/util/cbfstool/cbfstool.c index 5e7d904151..3263a91c05 100644 --- a/util/cbfstool/cbfstool.c +++ b/util/cbfstool/cbfstool.c @@ -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" -- cgit v1.2.3