coreboot-kgpe-d16/payloads/libpayload
Julius Werner 23d2465720 commonlib: Clean up compiler.h
This patch contains several minor cleanups related to compiler.h:

- Replace __always_unused() (which is a Linux-specific concept that
  doesn't make sense without also having __maybe_unused(), and had zero
  uses in the codebase) with __unused() which moves here from helpers.h

- Add __underscores__ to the names of all attributes in the compiler
  attribute shorthand macros. This is necessary to make them work in
  files where the same name was already used for an identifier (e.g.
  cbfstool/cbfs.h's `unused` array of file types).

- Remove libpayload's own copy of compiler.h and make it directly pull
  in the commonlib/bsd copy.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I9644da594bb69133843c6b7f12ce50b2e45fd24b
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64737
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
2022-06-07 12:34:35 +00:00
..
arch libpayload/x86: Fix boot_device_read() and hook it up 2022-02-23 22:47:09 +00:00
bin commonlib: Clean up compiler.h 2022-06-07 12:34:35 +00:00
configs libpayload: Add unit-tests framework and first test case 2021-10-18 12:33:49 +00:00
crypto
curses libpayload: curses: Only call `serial_set_color()` with initialized values 2021-07-14 08:22:05 +00:00
drivers libpayload/pci: Add pci_map_bus function for MediaTek platform 2022-05-20 02:53:35 +00:00
gdb
include commonlib: Clean up compiler.h 2022-06-07 12:34:35 +00:00
libc coreboot_tables: Add PCIe info to coreboot table 2022-05-19 16:34:55 +00:00
libcbfs commonlib/bsd: Remove cb_err_t 2022-03-09 02:18:21 +00:00
liblz4
liblzma
libpci
sample libpayload: Add mock architecture 2021-10-11 12:59:57 +00:00
tests commonlib: Clean up compiler.h 2022-06-07 12:34:35 +00:00
vboot libpayload/vboot: Fix include paths fixup macro 2022-03-25 19:25:36 +00:00
.gitignore
Doxyfile
Kconfig libpayload/pci: Add pci_map_bus function for MediaTek platform 2022-05-20 02:53:35 +00:00
LICENSES
LICENSE_GPL
Makefile libpayload: Install vboot headers and add include paths to lpgcc 2022-01-15 00:22:41 +00:00
Makefile.inc commonlib: Clean up compiler.h 2022-06-07 12:34:35 +00:00
Makefile.payload util/kconfig: Uprev to Linux 5.13's kconfig 2021-07-13 20:28:14 +00:00
README

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.