coreboot-kgpe-d16/payloads/libpayload
Yu-Ping Wu 59495543db libpayload: gdb: Condition video console init on LP_VIDEO_CONSOLE
With the stub video_console_init() removed from depthcharge in
CL:2241493, depthcharge will fail to compile:

 payloads/libpayload/gdb/stub.c:76: undefined reference to
 `video_console_init'

Since video_console_init() is meant to be implemented in
libpayload, libpayload should be consistent with itself by not calling
this function when it's not implemented (i.e., when !LP_VIDEO_CONSOLE).

Therefore, initialize video console only if LP_VIDEO_CONSOLE is set.

BRANCH=none
BUG=none
TEST=USE="menu_ui" emerge-gale depthcharge

Change-Id: Ic45f9073330258cb77301003484ec525b2404180
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42505
Reviewed-by: Joel Kitching <kitching@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2020-06-22 12:24:42 +00:00
..
arch treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
bin treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
configs trogdor: add support for Bubs variant 2020-04-15 19:57:59 +00:00
crypto treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
curses treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
drivers usb/xhci: Fix timeout logic 2020-06-06 09:26:02 +00:00
gdb libpayload: gdb: Condition video console init on LP_VIDEO_CONSOLE 2020-06-22 12:24:42 +00:00
include libpayload: drivers/usb: add a USB pre-poll hook 2020-06-06 01:49:52 +00:00
libc payloads/libpayload/libc: Avoid NULL pointer dereference 2020-05-28 09:34:37 +00:00
libcbfs treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
liblz4 lz4: Fix out-of-bounds reads 2020-03-02 15:03:03 +00:00
liblzma treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
libpci treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
sample treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
tests
Doxyfile payloads: Remove/fix trailing whitespace 2018-09-04 12:38:40 +00:00
Kconfig treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
LICENSES
LICENSE_GPL
Makefile treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
Makefile.inc treewide: Remove "this file is part of" lines 2020-05-11 17:11:40 +00:00
README payloads/libpayload: Update a Makefile for sample libpayload 2019-06-21 09:16:36 +00:00

README

-------------------------------------------------------------------------------
libpayload README
-------------------------------------------------------------------------------

libpayload is a minimal library to support standalone payloads
that can be booted with firmware like coreboot. It handles the setup
code, and provides common C library symbols such as malloc() and printf().

Note: This is _not_ a standard library for use with an operating system,
rather it's only useful for coreboot payload development!
See https://www.coreboot.org for details on coreboot.


Installation
------------

 $ git clone https://review.coreboot.org/coreboot.git

 $ cd coreboot/payloads/libpayload

 $ make menuconfig

 $ make

 $ make install (optional, will install into ./install per default)

On x86 systems, libpayload will always be 32-bit even if your host OS runs
in 64-bit, so you might have to install the 32-bit libgcc version.
On Debian systems you'd do 'apt-get install gcc-multilib' for example.

Run 'make distclean' before switching boards. This command will remove
your current .config file, so you need 'make menuconfig' again or
'make defconfig' in order to set up configuration. Default configuration
is based on 'configs/defconfig'. See the configs/ directory for examples
of configuration.


Usage
-----

Here's an example of a very simple payload (hello.c) and how to build it:

 #include <libpayload.h>

 int main(void)
 {
     printf("Hello, world!\n");
     return 0;
 }

Building the payload using the 'lpgcc' compiler wrapper:

 $ lpgcc -o hello.elf hello.c

Please see the sample/ directory for details.


Website and Mailing List
------------------------

The main website is https://www.coreboot.org/Libpayload.

For additional information, patches, and discussions, please join the
coreboot mailing list at https://www.coreboot.org/Mailinglist, where most
libpayload developers are subscribed.


Copyright and License
---------------------

See LICENSES.