Files
system76-coreboot/payloads/libpayload
Vadim Bendebury 66fdbced5e libpayload: Provide selfboot() external declaration in a common file
The earlier compilation warning fix (chromium 7e4aa17) incorrectly
assumed that selfboot() is a function defined in the cbfs driver.
This is a commonly available function, it should not come from cbfs.h.

BUG=none
TEST=the following  build command succeeds:
   rambi storm nyan_big

Original-Change-Id: I3ef49d849168ad9dc24589cbd9ce7382052345bd
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/201386
(cherry picked from commit d5090e8410530f41b9fd33e2caa1d8aa25438105)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I8404fb52112b391982f954a6d06fe4b451dfcb8a
Reviewed-on: http://review.coreboot.org/8003
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
2015-01-04 00:27:20 +01:00
..
2014-12-30 19:12:11 +01:00
2012-04-04 00:40:31 +02:00

-------------------------------------------------------------------------------
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 http://coreboot.org for details on coreboot.


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

 $ git clone http://review.coreboot.org/p/coreboot.git

 $ cd coreboot/payloads/libpayload

 $ make menuconfig

 $ make

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

As libpayload is for 32bit x86 systems only, you might have to install the
32bit libgcc version, otherwise your payloads will fail to compile.
On Debian systems you'd do 'apt-get install gcc-multilib' for example.


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 http://www.coreboot.org/Libpayload.

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


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

See LICENSES.