coreboot-kgpe-d16/payloads/libpayload
Caveh Jalali 673e014fab libpayload: add *SECS_PER_SEC macros to stddef.h
this adds convenience definitions for MSECS_PER_SEC, USECS_PER_MSEC,
and USECS_PER_SEC along the lines of the time units in coreboot's
<timer.h>.

Change-Id: I489dc2d1ff55d137936acec74ac875dc7fbc1713
Signed-off-by: Caveh Jalali <caveh@google.com>
Reviewed-on: https://review.coreboot.org/20882
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
2017-08-14 18:06:33 +00:00
..
arch Rename __attribute__((packed)) --> __packed 2017-07-13 19:45:59 +00:00
bin
configs libpayload: Double HEAP_SIZE in default config 2017-07-28 16:17:04 +00:00
crypto
curses libpayload/.../PDCurses: Improve compatibility with ncurses 2016-12-14 18:02:51 +01:00
drivers libpayload: Use a static copy of `font_glyph_filled()` 2017-08-10 12:07:13 +00:00
gdb libpayload/gdb: fix unused variable warning 2017-04-29 07:34:08 +02:00
include libpayload: add *SECS_PER_SEC macros to stddef.h 2017-08-14 18:06:33 +00:00
libc libpayload: Clean up unaligned memset() support 2017-07-26 19:34:02 +00:00
libcbfs libpayload: cbfs: Fix minor memory leak in some edge cases 2016-08-12 22:52:22 +02:00
liblz4 Rename __attribute__((packed)) --> __packed 2017-07-13 19:45:59 +00:00
liblzma libpayload: lzma: Allocate scratchpad on the heap 2016-08-08 19:02:07 +02:00
libpci Rename __attribute__((packed)) --> __packed 2017-07-13 19:45:59 +00:00
sample
tests
Doxyfile
Kconfig libpayload: video: Add support for font scaling with a factor 2017-08-03 20:37:07 +00:00
LICENSES
LICENSE_GPL
Makefile libpayload: fix build 2017-01-25 17:58:48 +01:00
Makefile.inc copy & update test routines from what-jenkins-does 2017-08-11 15:24:56 +00:00
README Use www.coreboot.org over coreboot.org 2017-06-07 12:05:44 +02:00

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/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 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.