mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-12-15 10:12:58 +00:00
440 lines
17 KiB
Nix
440 lines
17 KiB
Nix
{ lib, stdenv, buildPackages, runCommand, nettools, bc, bison, flex, perl, rsync, gmp, libmpc, mpfr, openssl
|
|
, cpio, elfutils, hexdump, zstd, python3Minimal, zlib, pahole, kmod, ubootTools
|
|
, fetchpatch
|
|
, rustc, rust-bindgen, rustPlatform
|
|
}:
|
|
|
|
let
|
|
lib_ = lib;
|
|
stdenv_ = stdenv;
|
|
|
|
readConfig = configfile: import (runCommand "config.nix" {} ''
|
|
echo "{" > "$out"
|
|
while IFS='=' read key val; do
|
|
[ "x''${key#CONFIG_}" != "x$key" ] || continue
|
|
no_firstquote="''${val#\"}";
|
|
echo ' "'"$key"'" = "'"''${no_firstquote%\"}"'";' >> "$out"
|
|
done < "${configfile}"
|
|
echo "}" >> $out
|
|
'').outPath;
|
|
in lib.makeOverridable ({
|
|
# The kernel version
|
|
version,
|
|
# The kernel pname (should be set for variants)
|
|
pname ? "linux",
|
|
# Position of the Linux build expression
|
|
pos ? null,
|
|
# Additional kernel make flags
|
|
extraMakeFlags ? [],
|
|
# The name of the kernel module directory
|
|
# Needs to be X.Y.Z[-extra], so pad with zeros if needed.
|
|
modDirVersion ? null /* derive from version */,
|
|
# The kernel source (tarball, git checkout, etc.)
|
|
src,
|
|
# a list of { name=..., patch=..., extraConfig=...} patches
|
|
kernelPatches ? [],
|
|
# The kernel .config file
|
|
configfile,
|
|
# Manually specified nixexpr representing the config
|
|
# If unspecified, this will be autodetected from the .config
|
|
config ? lib.optionalAttrs allowImportFromDerivation (readConfig configfile),
|
|
# Custom seed used for CONFIG_GCC_PLUGIN_RANDSTRUCT if enabled. This is
|
|
# automatically extended with extra per-version and per-config values.
|
|
randstructSeed ? "",
|
|
# Extra meta attributes
|
|
extraMeta ? {},
|
|
|
|
# for module compatibility
|
|
isZen ? false,
|
|
isLibre ? false,
|
|
isHardened ? false,
|
|
|
|
# Whether to utilize the controversial import-from-derivation feature to parse the config
|
|
allowImportFromDerivation ? false,
|
|
# ignored
|
|
features ? null, lib ? lib_, stdenv ? stdenv_,
|
|
}:
|
|
|
|
let
|
|
# Provide defaults. Note that we support `null` so that callers don't need to use optionalAttrs,
|
|
# which can lead to unnecessary strictness and infinite recursions.
|
|
modDirVersion_ = if modDirVersion == null then lib.versions.pad 3 version else modDirVersion;
|
|
in
|
|
let
|
|
# Shadow the un-defaulted parameter; don't want null.
|
|
modDirVersion = modDirVersion_;
|
|
inherit (lib)
|
|
hasAttr getAttr optional optionals optionalString optionalAttrs maintainers platforms;
|
|
|
|
drvAttrs = config_: kernelConf: kernelPatches: configfile:
|
|
let
|
|
# Folding in `ubootTools` in the default nativeBuildInputs is problematic, as
|
|
# it makes updating U-Boot cumbersome, since it will go above the current
|
|
# threshold of rebuilds
|
|
#
|
|
# To prevent these needless rounds of staging for U-Boot builds, we can
|
|
# limit the inclusion of ubootTools to target platforms where uImage *may*
|
|
# be produced.
|
|
#
|
|
# This command lists those (kernel-named) platforms:
|
|
# .../linux $ grep -l uImage ./arch/*/Makefile | cut -d'/' -f3 | sort
|
|
#
|
|
# This is still a guesstimation, but since none of our cached platforms
|
|
# coincide in that list, this gives us "perfect" decoupling here.
|
|
linuxPlatformsUsingUImage = [
|
|
"arc"
|
|
"arm"
|
|
"csky"
|
|
"mips"
|
|
"powerpc"
|
|
"sh"
|
|
"sparc"
|
|
"xtensa"
|
|
];
|
|
needsUbootTools =
|
|
lib.elem stdenv.hostPlatform.linuxArch linuxPlatformsUsingUImage
|
|
;
|
|
|
|
config = let attrName = attr: "CONFIG_" + attr; in {
|
|
isSet = attr: hasAttr (attrName attr) config;
|
|
|
|
getValue = attr: if config.isSet attr then getAttr (attrName attr) config else null;
|
|
|
|
isYes = attr: (config.getValue attr) == "y";
|
|
|
|
isNo = attr: (config.getValue attr) == "n";
|
|
|
|
isModule = attr: (config.getValue attr) == "m";
|
|
|
|
isEnabled = attr: (config.isModule attr) || (config.isYes attr);
|
|
|
|
isDisabled = attr: (!(config.isSet attr)) || (config.isNo attr);
|
|
} // config_;
|
|
|
|
isModular = config.isYes "MODULES";
|
|
withRust = config.isYes "RUST";
|
|
|
|
buildDTBs = kernelConf.DTB or false;
|
|
|
|
# Dependencies that are required to build kernel modules
|
|
moduleBuildDependencies = [
|
|
pahole
|
|
perl
|
|
elfutils
|
|
# module makefiles often run uname commands to find out the kernel version
|
|
(buildPackages.deterministic-uname.override { inherit modDirVersion; })
|
|
]
|
|
++ optional (lib.versionAtLeast version "5.13") zstd
|
|
++ optionals withRust [ rustc rust-bindgen ]
|
|
;
|
|
|
|
in (optionalAttrs isModular { outputs = [ "out" "dev" ]; }) // {
|
|
passthru = rec {
|
|
inherit version modDirVersion config kernelPatches configfile
|
|
moduleBuildDependencies stdenv;
|
|
inherit isZen isHardened isLibre withRust;
|
|
isXen = lib.warn "The isXen attribute is deprecated. All Nixpkgs kernels that support it now have Xen enabled." true;
|
|
baseVersion = lib.head (lib.splitString "-rc" version);
|
|
kernelOlder = lib.versionOlder baseVersion;
|
|
kernelAtLeast = lib.versionAtLeast baseVersion;
|
|
};
|
|
|
|
inherit src;
|
|
|
|
depsBuildBuild = [ buildPackages.stdenv.cc ];
|
|
nativeBuildInputs = [
|
|
bison
|
|
flex
|
|
perl
|
|
bc
|
|
nettools
|
|
openssl
|
|
rsync
|
|
gmp
|
|
libmpc
|
|
mpfr
|
|
elfutils
|
|
zstd
|
|
python3Minimal
|
|
kmod
|
|
hexdump
|
|
] ++ optional needsUbootTools ubootTools
|
|
++ optionals (lib.versionAtLeast version "5.2") [ cpio pahole zlib ]
|
|
++ optionals withRust [ rustc rust-bindgen ];
|
|
|
|
RUST_LIB_SRC = lib.optionalString withRust rustPlatform.rustLibSrc;
|
|
|
|
patches =
|
|
map (p: p.patch) kernelPatches
|
|
# Required for deterministic builds along with some postPatch magic.
|
|
++ optional (lib.versionOlder version "5.19") ./randstruct-provide-seed.patch
|
|
++ optional (lib.versionAtLeast version "5.19") ./randstruct-provide-seed-5.19.patch
|
|
# Linux 5.12 marked certain PowerPC-only symbols as GPL, which breaks
|
|
# OpenZFS; this was fixed in Linux 5.19 so we backport the fix
|
|
# https://github.com/openzfs/zfs/pull/13367
|
|
++ optional (lib.versionAtLeast version "5.12" &&
|
|
lib.versionOlder version "5.19" &&
|
|
stdenv.hostPlatform.isPower)
|
|
(fetchpatch {
|
|
url = "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/patch/?id=d9e5c3e9e75162f845880535957b7fd0b4637d23";
|
|
hash = "sha256-bBOyJcP6jUvozFJU0SPTOf3cmnTQ6ZZ4PlHjiniHXLU=";
|
|
});
|
|
|
|
postPatch = ''
|
|
# Ensure that depmod gets resolved through PATH
|
|
sed -i Makefile -e 's|= /sbin/depmod|= depmod|'
|
|
|
|
# Some linux-hardened patches now remove certain files in the scripts directory, so the file may not exist.
|
|
[[ -f scripts/ld-version.sh ]] && patchShebangs scripts/ld-version.sh
|
|
|
|
# Set randstruct seed to a deterministic but diversified value. Note:
|
|
# we could have instead patched gen-random-seed.sh to take input from
|
|
# the buildFlags, but that would require also patching the kernel's
|
|
# toplevel Makefile to add a variable export. This would be likely to
|
|
# cause future patch conflicts.
|
|
for file in scripts/gen-randstruct-seed.sh scripts/gcc-plugins/gen-random-seed.sh; do
|
|
if [ -f "$file" ]; then
|
|
substituteInPlace "$file" \
|
|
--replace NIXOS_RANDSTRUCT_SEED \
|
|
$(echo ${randstructSeed}${src} ${placeholder "configfile"} | sha256sum | cut -d ' ' -f 1 | tr -d '\n')
|
|
break
|
|
fi
|
|
done
|
|
|
|
patchShebangs scripts
|
|
|
|
# also patch arch-specific install scripts
|
|
for i in $(find arch -name install.sh); do
|
|
patchShebangs "$i"
|
|
done
|
|
|
|
# unset $src because the build system tries to use it and spams a bunch of warnings
|
|
# see: https://github.com/torvalds/linux/commit/b1992c3772e69a6fd0e3fc81cd4d2820c8b6eca0
|
|
unset src
|
|
'';
|
|
|
|
configurePhase = ''
|
|
runHook preConfigure
|
|
|
|
mkdir build
|
|
export buildRoot="$(pwd)/build"
|
|
|
|
echo "manual-config configurePhase buildRoot=$buildRoot pwd=$PWD"
|
|
|
|
if [ -f "$buildRoot/.config" ]; then
|
|
echo "Could not link $buildRoot/.config : file exists"
|
|
exit 1
|
|
fi
|
|
ln -sv ${configfile} $buildRoot/.config
|
|
|
|
# reads the existing .config file and prompts the user for options in
|
|
# the current kernel source that are not found in the file.
|
|
make $makeFlags "''${makeFlagsArray[@]}" oldconfig
|
|
runHook postConfigure
|
|
|
|
make $makeFlags "''${makeFlagsArray[@]}" prepare
|
|
actualModDirVersion="$(cat $buildRoot/include/config/kernel.release)"
|
|
if [ "$actualModDirVersion" != "${modDirVersion}" ]; then
|
|
echo "Error: modDirVersion ${modDirVersion} specified in the Nix expression is wrong, it should be: $actualModDirVersion"
|
|
exit 1
|
|
fi
|
|
|
|
buildFlagsArray+=("KBUILD_BUILD_TIMESTAMP=$(date -u -d @$SOURCE_DATE_EPOCH)")
|
|
|
|
cd $buildRoot
|
|
'';
|
|
|
|
buildFlags = [
|
|
"KBUILD_BUILD_VERSION=1-NixOS"
|
|
kernelConf.target
|
|
"vmlinux" # for "perf" and things like that
|
|
] ++ optional isModular "modules"
|
|
++ optionals buildDTBs ["dtbs" "DTC_FLAGS=-@"]
|
|
++ extraMakeFlags;
|
|
|
|
installFlags = [
|
|
"INSTALL_PATH=$(out)"
|
|
] ++ (optional isModular "INSTALL_MOD_PATH=$(out)")
|
|
++ optionals buildDTBs ["dtbs_install" "INSTALL_DTBS_PATH=$(out)/dtbs"];
|
|
|
|
preInstall = let
|
|
# All we really need to do here is copy the final image and System.map to $out,
|
|
# and use the kernel's modules_install, firmware_install, dtbs_install, etc. targets
|
|
# for the rest. Easy, right?
|
|
#
|
|
# Unfortunately for us, the obvious way of getting the built image path,
|
|
# make -s image_name, does not work correctly, because some architectures
|
|
# (*cough* aarch64 *cough*) change KBUILD_IMAGE on the fly in their install targets,
|
|
# so we end up attempting to install the thing we didn't actually build.
|
|
#
|
|
# Thankfully, there's a way out that doesn't involve just hardcoding everything.
|
|
#
|
|
# The kernel has an install target, which runs a pretty simple shell script
|
|
# (located at scripts/install.sh or arch/$arch/boot/install.sh, depending on
|
|
# which kernel version you're looking at) that tries to do something sensible.
|
|
#
|
|
# (it would be great to hijack this script immediately, as it has all the
|
|
# information we need passed to it and we don't need it to try and be smart,
|
|
# but unfortunately, the exact location of the scripts differs between kernel
|
|
# versions, and they're seemingly not considered to be public API at all)
|
|
#
|
|
# One of the ways it tries to discover what "something sensible" actually is
|
|
# is by delegating to what's supposed to be a user-provided install script
|
|
# located at ~/bin/installkernel.
|
|
#
|
|
# (the other options are:
|
|
# - a distribution-specific script at /sbin/installkernel,
|
|
# which we can't really create in the sandbox easily
|
|
# - an architecture-specific script at arch/$arch/boot/install.sh,
|
|
# which attempts to guess _something_ and usually guesses very wrong)
|
|
#
|
|
# More specifically, the install script exec's into ~/bin/installkernel, if one
|
|
# exists, with the following arguments:
|
|
#
|
|
# $1: $KERNELRELEASE - full kernel version string
|
|
# $2: $KBUILD_IMAGE - the final image path
|
|
# $3: System.map - path to System.map file, seemingly hardcoded everywhere
|
|
# $4: $INSTALL_PATH - path to the destination directory as specified in installFlags
|
|
#
|
|
# $2 is exactly what we want, so hijack the script and use the knowledge given to it
|
|
# by the makefile overlords for our own nefarious ends.
|
|
#
|
|
# Note that the makefiles specifically look in ~/bin/installkernel, and
|
|
# writeShellScriptBin writes the script to <store path>/bin/installkernel,
|
|
# so HOME needs to be set to just the store path.
|
|
#
|
|
# FIXME: figure out a less roundabout way of doing this.
|
|
installkernel = buildPackages.writeShellScriptBin "installkernel" ''
|
|
cp -av $2 $4
|
|
cp -av $3 $4
|
|
'';
|
|
in ''
|
|
installFlagsArray+=("-j$NIX_BUILD_CORES")
|
|
export HOME=${installkernel}
|
|
'';
|
|
|
|
# Some image types need special install targets (e.g. uImage is installed with make uinstall on arm)
|
|
installTargets = [
|
|
(kernelConf.installTarget or (
|
|
/**/ if kernelConf.target == "uImage" && stdenv.hostPlatform.linuxArch == "arm" then "uinstall"
|
|
else if kernelConf.target == "zImage" || kernelConf.target == "Image.gz" || kernelConf.target == "vmlinuz.efi" then "zinstall"
|
|
else "install"))
|
|
];
|
|
|
|
postInstall = optionalString isModular ''
|
|
mkdir -p $dev
|
|
cp vmlinux $dev/
|
|
if [ -z "''${dontStrip-}" ]; then
|
|
installFlagsArray+=("INSTALL_MOD_STRIP=1")
|
|
fi
|
|
make modules_install $makeFlags "''${makeFlagsArray[@]}" \
|
|
$installFlags "''${installFlagsArray[@]}"
|
|
unlink $out/lib/modules/${modDirVersion}/build
|
|
rm -f $out/lib/modules/${modDirVersion}/source
|
|
|
|
mkdir -p $dev/lib/modules/${modDirVersion}/{build,source}
|
|
|
|
# To save space, exclude a bunch of unneeded stuff when copying.
|
|
(cd .. && rsync --archive --prune-empty-dirs \
|
|
--exclude='/build/' \
|
|
* $dev/lib/modules/${modDirVersion}/source/)
|
|
|
|
cd $dev/lib/modules/${modDirVersion}/source
|
|
|
|
cp $buildRoot/{.config,Module.symvers} $dev/lib/modules/${modDirVersion}/build
|
|
make modules_prepare $makeFlags "''${makeFlagsArray[@]}" O=$dev/lib/modules/${modDirVersion}/build
|
|
|
|
# For reproducibility, removes accidental leftovers from a `cc1` call
|
|
# from a `try-run` call from the Makefile
|
|
rm -f $dev/lib/modules/${modDirVersion}/build/.[0-9]*.d
|
|
|
|
# Keep some extra files on some arches (powerpc, aarch64)
|
|
for f in arch/powerpc/lib/crtsavres.o arch/arm64/kernel/ftrace-mod.o; do
|
|
if [ -f "$buildRoot/$f" ]; then
|
|
cp $buildRoot/$f $dev/lib/modules/${modDirVersion}/build/$f
|
|
fi
|
|
done
|
|
|
|
# !!! No documentation on how much of the source tree must be kept
|
|
# If/when kernel builds fail due to missing files, you can add
|
|
# them here. Note that we may see packages requiring headers
|
|
# from drivers/ in the future; it adds 50M to keep all of its
|
|
# headers on 3.10 though.
|
|
|
|
chmod u+w -R ..
|
|
arch=$(cd $dev/lib/modules/${modDirVersion}/build/arch; ls)
|
|
|
|
# Remove unused arches
|
|
for d in $(cd arch/; ls); do
|
|
if [ "$d" = "$arch" ]; then continue; fi
|
|
if [ "$arch" = arm64 ] && [ "$d" = arm ]; then continue; fi
|
|
rm -rf arch/$d
|
|
done
|
|
|
|
# Remove all driver-specific code (50M of which is headers)
|
|
rm -fR drivers
|
|
|
|
# Keep all headers
|
|
find . -type f -name '*.h' -print0 | xargs -0 -r chmod u-w
|
|
|
|
# Keep linker scripts (they are required for out-of-tree modules on aarch64)
|
|
find . -type f -name '*.lds' -print0 | xargs -0 -r chmod u-w
|
|
|
|
# Keep root and arch-specific Makefiles
|
|
chmod u-w Makefile arch/"$arch"/Makefile*
|
|
|
|
# Keep whole scripts dir
|
|
chmod u-w -R scripts
|
|
|
|
# Delete everything not kept
|
|
find . -type f -perm -u=w -print0 | xargs -0 -r rm
|
|
|
|
# Delete empty directories
|
|
find -empty -type d -delete
|
|
'';
|
|
|
|
requiredSystemFeatures = [ "big-parallel" ];
|
|
|
|
meta = {
|
|
description =
|
|
"The Linux kernel" +
|
|
(if kernelPatches == [] then "" else
|
|
" (with patches: "
|
|
+ lib.concatStringsSep ", " (map (x: x.name) kernelPatches)
|
|
+ ")");
|
|
license = lib.licenses.gpl2Only;
|
|
homepage = "https://www.kernel.org/";
|
|
maintainers = lib.teams.linux-kernel.members ++ [
|
|
maintainers.thoughtpolice
|
|
];
|
|
platforms = platforms.linux;
|
|
badPlatforms =
|
|
lib.optionals (lib.versionOlder version "4.15") [ "riscv32-linux" "riscv64-linux" ] ++
|
|
lib.optional (lib.versionOlder version "5.19") "loongarch64-linux";
|
|
timeout = 14400; # 4 hours
|
|
} // extraMeta;
|
|
};
|
|
in
|
|
|
|
stdenv.mkDerivation ((drvAttrs config stdenv.hostPlatform.linux-kernel kernelPatches configfile) // {
|
|
inherit pname version;
|
|
|
|
enableParallelBuilding = true;
|
|
|
|
hardeningDisable = [ "bindnow" "format" "fortify" "stackprotector" "pic" "pie" ];
|
|
|
|
# Absolute paths for compilers avoid any PATH-clobbering issues.
|
|
makeFlags = [
|
|
"O=$(buildRoot)"
|
|
"CC=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc"
|
|
"HOSTCC=${buildPackages.stdenv.cc}/bin/${buildPackages.stdenv.cc.targetPrefix}cc"
|
|
"HOSTLD=${buildPackages.stdenv.cc.bintools}/bin/${buildPackages.stdenv.cc.targetPrefix}ld"
|
|
"ARCH=${stdenv.hostPlatform.linuxArch}"
|
|
] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
|
|
"CROSS_COMPILE=${stdenv.cc.targetPrefix}"
|
|
] ++ (stdenv.hostPlatform.linux-kernel.makeFlags or [])
|
|
++ extraMakeFlags;
|
|
|
|
karch = stdenv.hostPlatform.linuxArch;
|
|
} // (optionalAttrs (pos != null) { inherit pos; })))
|