Since fmap doesn't come with a checksum, we resort to a number of
heuristics to determine if a given location hosts an fmap (instead of
another data structure that happens to store the fmap magic string at
the right location).
The version test is particularly effective against strings containing
the magic (which either terminate with 0, or have some other ASCII data,
but rarely a '\001' byte inside the string).
Change-Id: Ic66eb0015c7ffdfe25e0054b7838445b8ba098e9
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/11690
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
The buffer API that cbfstool uses to read and write files only directly supports
one-shot operations on whole files. This adds an intermediate partitioned_file
module that sits on top of the buffer system and has an awareness of FMAP
entries. It provides an easy way to get a buffer for an individual region of a
larger image file based on FMAP section name, as well as incrementally write
those smaller buffers back to the backing file at the appropriate offset. The
module has two distinct modes of operation:
- For new images whose layout is described exclusively by an FMAP section, all
the aforementioned functionality will be available.
- For images in the current format, where the CBFS master header serves as the
root of knowledge of the image's size and layout, the module falls back to a
legacy operation mode, where it only allows manipulation of the entire image
as one unit, but exposes this support through the same interface by mapping
the region named SECTION_NAME_PRIMARY_CBFS ("COREBOOT") to the whole file.
The tool is presently only ported onto the new module running in legacy mode:
higher-level support for true "partitioned" images will be forthcoming. However,
as part of this change, the crusty cbfs_image_from_file() and
cbfs_image_write_file() abstractions are removed and replaced with a single
cbfs_image function, cbfs_image_from_buffer(), as well as centralized image
reading/writing directly in cbfstool's main() function. This reduces the
boilerplate required to implement each new action, makes the create action much
more similar to the others, and will make implementing additional actions and
adding in support for the new format much easier.
BUG=chromium:470407
TEST=Build panther and nyan_big coreboot.rom images with and without this patch
and diff their hexdumps. Ensure that no differences occur at different locations
from the diffs between subsequent builds of an identical source tree. Then flash
a full new build onto nyan_big and watch it boot normally.
BRANCH=None
Change-Id: I25578c7b223bc8434c3074cb0dd8894534f8c500
Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Commit-Id: 7e1c96a48e7a27fc6b90289d35e6e169d5e7ad20
Original-Change-Id: Ia4a1a4c48df42b9ec2d6b9471b3a10eb7b24bb39
Original-Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/265581
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10134
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This adds a compiler for a language whose textual representation of flashmap
regions will be used to describe the layout of flash chips that contain more
than just a single CBFS. Direct integration with cbfstool (via a new
command-line switch for the create action) is forthcoming but will be added
separately.
BUG=chromium:461875
TEST=Use Chromium OS's cros_bundle_firmware script on the fmap.dts file for
panther. Using the latter file as a reference, write a corresponding
fmap.fmd file and feed it through fmaptool. Run both binary output files
though the flashmap project's own flashmap_decode utility. Observe only
the expected differences.
BRANCH=None
Change-Id: I06b32d138dbef0a4e5ed43c81bd31c796fd5d669
Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Commit-Id: 005ab67eb594e21489cf31036aedaea87e0c7142
Original-Change-Id: Ia08f28688efdbbfc70c255916b8eb7eb0eb07fb2
Original-Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/255031
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-on: http://review.coreboot.org/9942
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This is being fixed in a separate commit so we can diff against the
library as it existed in its own repo.
Change-Id: Id87cd8f4e015a5ed7dd8a19302cc22ab744fefe8
Signed-off-by: Sol Boucher <solb@chromium.org>
Reviewed-on: http://review.coreboot.org/10141
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
flashmap was developed in a separate repository until now.
Import the files from the 2012 version of the project [1].
[1] https://code.google.com/p/flashmap
BUG=chromium:461875
TEST=None
BRANCH=None
Change-Id: Ida33f81509abc1cf2e532435adbbf31919d96bd8
Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Commit-Id: f44e1d1864babe244f07ca49655f0b80b84e890d
Original-Change-Id: Ibf191d34df738449c9b9d7ebccca3d7f4150d4d3
Original-Signed-off-by: Sol Boucher <solb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/254801
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: http://review.coreboot.org/9940
Tested-by: build bot (Jenkins)
Patrick Georgi