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* libflashrom/fmap: Don't use off_t for flash offsetsJulius Werner2022-02-201-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | off_t is a special POSIX type that is used to represent file offsets in certain APIs (e.g. lseek(), mmap()), and should not be reused to represent anything else (such as flash offsets). In particular, the width of the type may change based on the definition of the _FILE_OFFSET_BITS macro. Using such a type at the libflashrom interface is particularly dangerous, because if a program is built with a different _FILE_OFFSET_BITS value than libflashrom, the resulting ABI corruption will cause very very nasty and confusing bugs. This patch replaces all instances of off_t that are not related to file offsets with (s)size_t. BUG=b:219811851 TEST=`elogtool list` on cherry. Signed-off-by: Julius Werner <jwerner@chromium.org> Change-Id: I68a386973f79ea634f63dfcd7d95a63400e1fdee Reviewed-on: https://review.coreboot.org/c/flashrom/+/61943 Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: Nikolai Artemiev <nartemiev@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* fmap.c: Avoid undefined behaviour with fmap_lsearch([len:=0])Edward O'Callaghan2022-02-031-0/+3
| | | | | | | | | | | | | | | | | | Calling libflashrom entry-points that internally dispatch to fmap_lsearch() can result in a integer overflow. Therefore validate the length paramter before attempting to use it. BUG=none TEST=`make` Change-Id: Ifb408c55c3b69ddff453dcc704b7389298050473 Signed-off-by: Edward O'Callaghan <quasisec@google.com> Spotted-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://review.coreboot.org/c/flashrom/+/61545 Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Angel Pons <th3fanbus@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
* treewide: Drop most cases of `sizeof(struct ...)`Angel Pons2021-06-091-1/+1
| | | | | | | | | | | | | | | | Spelling out the struct type name hurts readability and introduces opportunities for bugs to happen when the pointer variable type is changed but the corresponding sizeof is (are) not. TEST=`make CONFIG_EVERYTHING=yes CONFIG_JLINK_SPI=no VERSION=none -j` with and without this patch; the flashrom executable does not change. Change-Id: Icc0b60ca6ef9f5ece6ed2a0e03600bb6ccd7dcc6 Signed-off-by: Angel Pons <th3fanbus@gmail.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/55266 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
* fmap.{c,h}: update copyright year and nameNikolai Artemiev2020-10-301-1/+1
| | | | | | | | | | | Looks like the year should be 2010 based on cros git history. Signed-off-by: Nikolai Artemiev <nartemiev@google.com> Change-Id: I7c27e682bd09f7b1ba0398dc231b9360aed1c26b Reviewed-on: https://review.coreboot.org/c/flashrom/+/46440 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Edward O'Callaghan <quasisec@chromium.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
* Fix -Wsign-compare troubleNico Huber2019-07-311-2/+2
| | | | | | | | | | | Mostly by changing to `unsigned` types where applicable, sometimes `signed` types, and casting as a last resort. Change-Id: I08895543ffb7a48058bcf91ef6500ca113f2d305 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/c/flashrom/+/30409 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jacob Garber <jgarber1@ualberta.ca>
* fmap.c: Remove unneeded 'else'Elyes HAOUAS2019-06-211-5/+3
| | | | | | | | | | 'else' is not needed after a 'break' or 'return'. Change-Id: I5df4d8075be012b9edf7be520d611042d9945094 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/flashrom/+/33345 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
* fmap: Fix length calculation in error messageNico Huber2018-12-211-1/+1
| | | | | | | | Change-Id: Ie0f448970de6a7829f304448e0835eaeb7d103a3 Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: https://review.coreboot.org/c/30152 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: David Hendricks <david.hendricks@gmail.com>
* Add support to get layout from fmap (e.g. coreboot rom)Arthur Heymans2018-10-231-0/+333
Flashmap, or simply fmap, is a binary data format for describing region offsets, sizes, and certain attributes and is widely used by coreboot. This patch adds support for the fmap data format version 1.1 and adds --fmap and --fmap-file arguments. Using --fmap will make flashrom to search the ROM content for fmap data. Using --fmap-file will make flashrom search a supplied file for fmap data. An example of how to update the COREBOOT region of a ROM: flashrom -p programmer --fmap -w coreboot.rom -i COREBOOT flashrom -p programmer --fmap-file coreboot.rom -w coreboot.rom -i COREBOOT The fmap functions are mostly copied from cbfstool. Currently it is made mutually exclusive with other layout options until we are more clever about this input. Change-Id: I0e7fad38ed79a84d41358e1f175c36d255786c12 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: David Hendricks <dhendricks@fb.com> Reviewed-on: https://review.coreboot.org/23203 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Tested-by: David Hendricks <david.hendricks@gmail.com> Reviewed-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-by: Nico Huber <nico.h@gmx.de>
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