Never, ever build images where GRUB is the primary payload.
These options have been removed from target.cfg handling:
* seabios_withgrub
* grub_withseabios
The "payload_grub" variable now does the same thing as
the old "seabios_withgrub" variable, if set.
The "grubonly" configuration is retained, and enabled by
default when SeaGRUB is enabled (non-grubonly also available).
Due to lbmk issue #216, it is no longer Libreboot policy to
make GRUB the primary payload on any board. GRUB's sheer size
and complexity, plus the large number of memory corruption issues
similar to it that *have* been fixed over the years, tells me
that GRUB is a liability when it is the primary payload.
SeaBIOS is a much safer payload to run as primary, on x86, due
to its smaller size and much more conservative development; it
is simply far less likely to break.
If GRUB breaks in the future, the user's machine is not
bricked. This is because SeaBIOS is the default payload.
Since I no longer wish to ever provide GRUB as a primary
payload, supporting it in lbmk adds needless bloat that
will later probably break anyway due to lack of testing,
so let's just assume SeaGRUB in all cases where the user
wants to use a GRUB payload.
You can mitigate potential security issues with SeaBIOS
by disabling option ROM execution, which can be done at
runtime by inserting integers into CBFS. The SeaBIOS
documentation says how to do this.
Libreboot's GRUB hardening guide still says how to add
a bootorder file in CBFS, making SeaBIOS only load GRUB
from CBFS, and nothing else. This, combined with the
disablement of option ROM execution (if using Intel
graphics), pretty much provides the same security benefits
as GRUB-as-primary, for example when setting a GRUB password
and GPG checks, with encrypted /boot as in the hardening guide.
Signed-off-by: Leah Rowe <leah@libreboot.org>
due to lbmk issue #216, it is now unwise to use grub as the
primary payload on any machine; the sheer complexity of grub
and the number of memory corruption bugs that have been fixed
due to auditing over the years, means more such bugs exist.
we now provide seabios as the primary payload on all x86 ports,
but provide a "grubfirst" configuration where a bootorder file
in seabios can be added via cbfs, which tells seabios to load
grub from cbfs first, while still allowing use of the boot select
menu by pressing esc in seabios.
well, the "grubonly" option also disables the seabios esc menu,
so that *only* grub runs. there is no point in using this unless
you want to harden your setup, for example if you want to set up
encrypted /boot and boot that from grub, and have a grub password
disallowing unauthorised bootup of your machine.
see grub hardening guide;
https://libreboot.org/docs/linux/grub_hardening.html
at least as of today, 22 June 2024, that page already says
how to manually disable the seabios menu in the same way, if that
is the setup you want. alternatively, a user may be wily
enough to edit target.cfg for their board and compile a rom
that only has the grub payload in it, if that is what the user
wishes to do.
regardless, the default configurations provided by lbmk must never
be unsafe, norc should the build system support such unsafe
settings;
yes, grub as primary payload is technically still supported in
lbmk. actually, at the time of this revision, i have half a mind
to remove that functionality altogether, so that only seabios is
allowed as primary payload, when compiling a rom image that also
has grub, chainloading grub from the seabios menu instead.
Signed-off-by: Leah Rowe <leah@libreboot.org>
it's bloat. telling the user to rtfm is something that
we already do on irc; they will still ask how to do
everything, and ignore the message from badcmd(), or
they will automatically know to rtfm.
i'm on a massive purge, removing bloat from lbmk as
part of Libreboot Build System Audit 6.
all bloat must go.
Signed-off-by: Leah Rowe <leah@libreboot.org>
replace it with logic that simply uses "." to load
files directly.
config/git files are now directories, also containing
pkg.cfg files each with the same variables as before,
such as repository link and commit hash
this change results in a noticeable reduction in code
complexity within the build system.
unified reading of config files: new function setcfg()
added to lib.sh
setcfg checks if a config exists. if a 2nd argument is
passed, it is used as a return value for eval, otherwise
a string calling err is passed. setcfg output is passed
through eval, to set strings based on config; eval must
be used, so that the variables are set within the same
scope, otherwise they'd be set within setcfg which could
lead to some whacky results.
there's still a bit more more to do, but this single change
results in a substantial reduction in code complexity.
Signed-off-by: Leah Rowe <leah@libreboot.org>
do not use shorthand here. the test was failing to
produce the desired result under some circumstances,
for example when i did "./update release" i got this:
make: Entering directory '/home/lbdev/lbmk/release/20240612-62-ga6b1a6bd/libreboot-20240612-62-ga6b1a6bd_src/src/stm32-vserprog'
make: *** No rule to make target 'fetch'. Stop.
make: Leaving directory '/home/lbdev/lbmk/release/20240612-62-ga6b1a6bd/libreboot-20240612-62-ga6b1a6bd_src/src/stm32-vserprog'
ERROR script/trees: !mk src/stm32-vserprog fetch
ERROR ./update: excmd: script/trees -f
ERROR script/roms: Unhandled non-zero exit: ./update
ERROR ./build: excmd: script/roms serprog
ERROR ./update: build_release release/20240612-62-ga6b1a6bd: stm32
ERROR ./update: can't build rom images
in the above circumstance, run_make_command was executed,
which is not the desired behaviour; rather, fetch_project_trees
or fetch_project_repo should be called, and then the script
should immediately exit. it should also exit, without downloading
anything, if a changelog file exists as in release archives.
Signed-off-by: Leah Rowe <leah@libreboot.org>
This reverts commit 3610667e3db08ff1db4f7784ff5a879d8aebce9d.
The output of some functions in the roms script are used as
an argument in cp and mv commands, also cbfstool. I overlooked
this fact in a previous code optimisation.
Revert it. The change only reduced sloccount by a few lines
anyway.
this is bloat, because it's something the user can already
do at runtime configuration anyway.
set it to a reasonable default of 8 seconds instead of 5,
and don't honour the timeout variable in target.cfg.
this will be documented in the next release.
Signed-off-by: Leah Rowe <leah@libreboot.org>
i disabled a check in the script, while testing a prior
modification. re-introoduce the check, which is put there
to yield an error condition if no targets were compiled.
Signed-off-by: Leah Rowe <leah@libreboot.org>
payloads are compiled before coreboot, but it doesn't matter
to the build speed whether this is done first.
reduce the lines of code by checking payload builds *while*
adding them to the coreboot images. this means that coreboot
is now compiled first, before the payloads.
Signed-off-by: Leah Rowe <leah@libreboot.org>
nowadays, we don't insert GRUB keymaps automatically, for
sake of efficiency; without one, the default is US QWERTY.
Signed-off-by: Leah Rowe <leah@libreboot.org>
there are two for loops that use x as a variable anme,
and an idiosyncrasy of certain sh implementations is
that these become global;
the result in this case was that when you finish building
every target in "./build roms", it would print "libgfxinit"
repeatedly, comma separated, instead of a comma-separated
list of the targets that were built.
work around it by renaming the variable in one of the loops.
Signed-off-by: Leah Rowe <leah@libreboot.org>
cbcfg is already a global variable, so there's no reason
to set it again at the start of this function.
remove the check for whether the given coreboot config
exists, to the calling function instead of build_roms().
Signed-off-by: Leah Rowe <leah@libreboot.org>
we don't need to call mktemp everytime.
just use a staticly named file in tmpdir
and keep overwriting it.
these files are only small, and they get deleted
when the build system exits later on.
Signed-off-by: Leah Rowe <leah@libreboot.org>
we don't need to check whether this variable is set,
because checking an empty path will also cause the
same return in the next line.
Signed-off-by: Leah Rowe <leah@libreboot.org>
Leah Rowe