[coreboot-gerrit] Change in coreboot[master]: util/cbfstool: Add "expand" command to make CBFS span an fmap region

[Patrick Georgi (Code Review)]

Hello Julius Werner, Caveh Jalali, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/21598

to look at the new patch set (#2).

Change subject: util/cbfstool: Add "expand" command to make CBFS span an fmap region
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util/cbfstool: Add "expand" command to make CBFS span an fmap region

vboot images come with multiple regions carrying CBFS file systems. To
expedite hashing (from slow flash memory), the FW_MAIN_* regions are
truncated since they typically have pretty large unused space at the
end that is of no interest.
For test purposes it can be useful to re-engage that space, so add a
command that creates a new empty file entry covering that area (except
for the last 4 bytes for the master header pointer, as usual).

BUG=b:65853903
BRANCH=none
TEST=`cbfstool test.bin expand -r FW_MAIN_A` creates a new empty file of
the expected size on a Chrome OS firmware image.

Change-Id: I160c8529ce4bfcc28685166b6d9035ade4f6f1d1
Signed-off-by: Patrick Georgi 
---
M util/cbfstool/cbfs_image.c
M util/cbfstool/cbfs_image.h
M util/cbfstool/cbfstool.c
3 files changed, 56 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/98/21598/2