forked from DGNum/liminix
f1b7780537
by having two separate derivations for patching the kernel source tree and building it, we have to copy said source trees from one store location to another which takes non-neglible time on spinning rust (literally minutes on my machine). Replace with a single derivation that can do more things on one tree in-place
48 lines
1.2 KiB
Nix
48 lines
1.2 KiB
Nix
{
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lzma
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, stdenv
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, ubootTools
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, dtc
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} :
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let
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objcopy = "${stdenv.cc.bintools.targetPrefix}objcopy";
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in {
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kernel
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, commandLine
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, entryPoint
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, extraName ? "" # e.g. socFamily
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, loadAddress
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, dtb ? null
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} :
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stdenv.mkDerivation {
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name = "kernel.image";
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phases = [
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"preparePhase"
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(if dtb != null then "dtbPhase" else ":")
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"buildPhase"
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"installPhase" ];
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nativeBuildInputs = [
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lzma
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dtc
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stdenv.cc
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ubootTools
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];
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preparePhase = ''
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cp ${kernel} vmlinux.elf; chmod +w vmlinux.elf
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'';
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dtbPhase = ''
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dtc -I dtb -O dts -o tmp.dts ${dtb}
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echo '/{ chosen { bootargs = ${builtins.toJSON commandLine}; }; };' >> tmp.dts
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dtc -I dts -O dtb -o tmp.dtb tmp.dts
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${objcopy} --update-section .appended_dtb=tmp.dtb vmlinux.elf || ${objcopy} --add-section .appended_dtb=${dtb} vmlinux.elf
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'';
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buildPhase = ''
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${objcopy} -O binary -R .reginfo -R .notes -R .note -R .comment -R .mdebug -R .note.gnu.build-id -S vmlinux.elf vmlinux.bin
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rm -f vmlinux.bin.lzma ; lzma -k -z vmlinux.bin
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mkimage -A mips -O linux -T kernel -C lzma -a ${loadAddress} -e ${entryPoint} -n 'MIPS Liminix Linux ${extraName}' -d vmlinux.bin.lzma kernel.uimage
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'';
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installPhase = ''
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cp kernel.uimage $out
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'';
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}
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