coreboot

coreboot™: fast, flexible and reproducible Open Source firmware!

Reproducible Coreboot

Reproducible builds enable anyone to reproduce bit by bit identical binary packages from a given source, so that anyone can verify that a given binary derived from the source it was said to be derived. There is more information about reproducible builds on the Debian wiki and on https://reproducible-builds.org. These pages explain in more depth why this is useful, what common issues exist and which workarounds and solutions are known.

Reproducible Coreboot is an effort to apply this to coreboot. Thus each coreboot.rom is build twice (without payloads), with a few variations added and then those two ROMs are compared using diffoscope. Please note that the toolchain is not varied at all as the rebuild happens on exactly the same system. More variations are expected to be seen in the wild.

There is a weekly run jenkins job to test the master branch of coreboot.git. The jenkins job is running reproducible_coreboot.sh in a Debian environment and this script is solely responsible for creating this page. Feel invited to join #reproducible-builds (on irc.oftc.net) to request job runs whenever sensible. Patches and other feedback are very much appreciated - if you want to help, please start by looking at the ToDo list for coreboot, you might find something easy to contribute.
Thanks to IONOS for donating the virtual machines this is running on!

127 (100.0%) out of 127 built coreboot images were reproducible in our test setup ! These tests were last run on 2024-06-24 for version 24.05-324-gad3472a93c using diffoscope 271.

variationfirst buildsecond build
hostname osuosl1-amd64 or osuosl2-amd64the other one
domainname is not yet varied between rebuilds of coreboot.
env CAPTURE_ENVIRONMENTnot setCAPTURE_ENVIRONMENT="I capture the environment"
env TZTZ="/usr/share/zoneinfo/Etc/GMT+12"TZ="/usr/share/zoneinfo/Etc/GMT-14"
env LANGLANG="en_GB.UTF-8"LANG="et_EE.UTF-8"
env LC_ALLnot setLC_ALL="et_EE.UTF-8"
env PATHPATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:"PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/i/capture/the/path"
env USER is not yet varied between rebuilds of coreboot.
uid is not yet varied between rebuilds of coreboot.
gid is not yet varied between rebuilds of coreboot.
UTS namespace is not yet varied between rebuilds of coreboot.
kernel version, modified using /usr/bin/linux64 --uname-2.6Linux 6.7.12+bpo-amd64Linux 2.6.67+bpo-amd64
umask00220002
CPU type AMD Opteron(tm) Processor 4284same for both builds
/bin/sh is not yet varied between rebuilds of coreboot.
year, month, datetoday (2024-06-24)same for both builds (currently, work in progress)
hour, minutehour and minute will probably vary between two builds...the future system actually runs 398 days, 6 hours and 23 minutes ahead...
Filesystemtmpfssame for both builds (currently, this could be varied using disorderfs)
everything else...is likely the same. There will be more variations in the wild.

commit ad3472a93c5bdcc63196344c5631ec9b1feac246
Author: Amanda Huang 
Date:   Thu Jun 20 16:50:41 2024 +0800

    mb/google/trulo/var/orisa: Configure SEN_MODE_EC_PCH_INT_ODL as input
    
    Configure GPP_R2 as input, no pull according to schematic_20240614.
    
    BUG=b:333486830
    BRANCH=firmware-nissa-15217.B
    TEST=emerge-nissa coreboot
    
    Change-Id: Ic678b77e5489f56d8ff92b265a6ca5852c0f7e8d
    Signed-off-by: Amanda Huang 
    Reviewed-on: https://review.coreboot.org/c/coreboot/+/83142
    Tested-by: build bot (Jenkins) 
    Reviewed-by: Eric Lai 
    Reviewed-by: Kapil Porwal

cross toolchain sourcesha256sum
acpica-unix-20240321.tar.gz 54a299487925fd3e0551c95f9d5cee4f4984930273983eff67aa5cd46f8f338b
binutils-2.42.tar.xz f6e4d41fd5fc778b06b7891457b3620da5ecea1006c6a4a41ae998109f85a800
gcc-14.1.0.tar.xz e283c654987afe3de9d8080bc0bd79534b5ca0d681a73a11ff2b5d3767426840
gmp-6.3.0.tar.xz a3c2b80201b89e68616f4ad30bc66aee4927c3ce50e33929ca819d5c43538898
mpc-1.3.1.tar.gz ab642492f5cf882b74aa0cb730cd410a81edcdbec895183ce930e706c1c759b8
mpfr-4.2.1.tar.xz 277807353a6726978996945af13e52829e3abd7a9a5b7fb2793894e18f1fcbb2
Debian 12.5 package on amd64installed version
gcc 4:12.2.0-3
g++ 4:12.2.0-3
make 4.3-4.1
cmake 3.25.1-1
flex 2.6.4-8.2
bison 2:3.8.2+dfsg-1+b1
pkg-config 1.8.1-1

There is more information about jenkins.debian.net and about reproducible builds of Debian available elsewhere.
Please send technical feedback about this setup to the Debian jenkins development list, or as a bug report against the jenkins.debian.org package. Feedback about specific job results should go to their respective lists and/or the BTS.
The code of jenkins.debian.net is mostly GPL-2 licensed. The weather icons are public domain and were taken from the Tango Icon Library. Copyright 2014-2024 Holger Levsen and many others.
Last update: 2024-06-24 14:31 UTC