0cdaad36eb
Change-Id: I9972b138c6dd2a289880c4ec8b3fe64fc3baa66b Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-on: https://review.coreboot.org/25545 Reviewed-by: Patrick Georgi <pgeorgi@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
65 lines
1.6 KiB
Text
65 lines
1.6 KiB
Text
-------------------------------------------------------------------------------
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libpayload README
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-------------------------------------------------------------------------------
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libpayload is a minimal library to support standalone payloads
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that can be booted with firmware like coreboot. It handles the setup
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code, and provides common C library symbols such as malloc() and printf().
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Note: This is _not_ a standard library for use with an operating system,
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rather it's only useful for coreboot payload development!
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See https://www.coreboot.org for details on coreboot.
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Installation
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------------
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$ git clone https://review.coreboot.org/coreboot.git
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$ cd coreboot/payloads/libpayload
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$ make menuconfig
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$ make
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$ sudo make install (optional, will install into /opt per default)
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As libpayload is for 32bit x86 systems only, you might have to install the
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32bit libgcc version, otherwise your payloads will fail to compile.
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On Debian systems you'd do 'apt-get install gcc-multilib' for example.
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Usage
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-----
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Here's an example of a very simple payload (hello.c) and how to build it:
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#include <libpayload.h>
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int main(void)
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{
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printf("Hello, world!\n");
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return 0;
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}
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Building the payload using the 'lpgcc' compiler wrapper:
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$ lpgcc -o hello.elf hello.c
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Please see the sample/ directory for details.
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Website and Mailing List
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------------------------
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The main website is https://www.coreboot.org/Libpayload.
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For additional information, patches, and discussions, please join the
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coreboot mailing list at https://www.coreboot.org/Mailinglist, where most
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libpayload developers are subscribed.
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Copyright and License
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---------------------
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See LICENSES.
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