binfmt
This commit is contained in:
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bc077edd64
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@ -0,0 +1,372 @@
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{ config, lib, pkgs, ... }:
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let
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inherit (lib) mkOption mkDefault types optionalString;
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cfg = config.boot.binfmt;
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makeBinfmtLine = name: { recognitionType, offset, magicOrExtension
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, mask, preserveArgvZero, openBinary
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, matchCredentials, fixBinary, ...
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}: let
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type = if recognitionType == "magic" then "M" else "E";
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offset' = toString offset;
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mask' = toString mask;
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interpreter = "/run/binfmt/${name}";
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flags = if !(matchCredentials -> openBinary)
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then throw "boot.binfmt.registrations.${name}: you can't specify openBinary = false when matchCredentials = true."
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else optionalString preserveArgvZero "P" +
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optionalString (openBinary && !matchCredentials) "O" +
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optionalString matchCredentials "C" +
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optionalString fixBinary "F";
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in ":${name}:${type}:${offset'}:${magicOrExtension}:${mask'}:${interpreter}:${flags}";
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mkInterpreter = name: { interpreter, wrapInterpreterInShell, ... }:
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if wrapInterpreterInShell
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then pkgs.writeShellScript "${name}-interpreter" ''
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#!${pkgs.bash}/bin/sh
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exec -- ${interpreter} "$@"
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''
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else interpreter;
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# Mapping of systems to “magicOrExtension” and “mask”. Mostly taken from:
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# - https://github.com/cleverca22/nixos-configs/blob/master/qemu.nix
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# and
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# - https://github.com/qemu/qemu/blob/master/scripts/qemu-binfmt-conf.sh
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# TODO: maybe put these in a JSON file?
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magics = {
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armv6l-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\x00\xff\xfe\xff\xff\xff'';
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};
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armv7l-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x28\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\x00\xff\xfe\xff\xff\xff'';
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};
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aarch64-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\x00\xff\xfe\xff\xff\xff'';
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};
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aarch64_be-linux = {
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magicOrExtension = ''\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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i386-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x03\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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i486-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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i586-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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i686-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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x86_64-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x3e\x00'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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alpha-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x26\x90'';
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mask = ''\xff\xff\xff\xff\xff\xfe\xfe\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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sparc64-linux = {
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magicOrExtension = ''\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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sparc-linux = {
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magicOrExtension = ''\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x12'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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powerpc-linux = {
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magicOrExtension = ''\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x14'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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powerpc64-linux = {
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magicOrExtension = ''\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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powerpc64le-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x15\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\x00'';
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};
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mips-linux = {
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magicOrExtension = ''\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20'';
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};
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mipsel-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x00\x00\x00'';
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};
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mips64-linux = {
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magicOrExtension = ''\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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mips64el-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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mips64-linuxabin32 = {
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magicOrExtension = ''\x7fELF\x01\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20'';
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};
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mips64el-linuxabin32 = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x08\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x00\x00\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\x00\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x20\x00\x00\x00'';
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};
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riscv32-linux = {
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magicOrExtension = ''\x7fELF\x01\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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riscv64-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xf3\x00'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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loongarch64-linux = {
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magicOrExtension = ''\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x02\x01'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\xfc\x00\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff'';
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};
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wasm32-wasi = {
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magicOrExtension = ''\x00asm'';
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mask = ''\xff\xff\xff\xff'';
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};
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wasm64-wasi = {
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magicOrExtension = ''\x00asm'';
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mask = ''\xff\xff\xff\xff'';
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};
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s390x-linux = {
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magicOrExtension = ''\x7fELF\x02\x02\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x16'';
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mask = ''\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff'';
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};
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x86_64-windows.magicOrExtension = "MZ";
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i686-windows.magicOrExtension = "MZ";
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};
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in {
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imports = [
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(lib.mkRenamedOptionModule [ "boot" "binfmtMiscRegistrations" ] [ "boot" "binfmt" "registrations" ])
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];
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options = {
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boot.binfmt = {
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registrations = mkOption {
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default = {};
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description = ''
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Extra binary formats to register with the kernel.
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See https://www.kernel.org/doc/html/latest/admin-guide/binfmt-misc.html for more details.
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'';
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type = types.attrsOf (types.submodule ({ config, ... }: {
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options = {
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recognitionType = mkOption {
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default = "magic";
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description = "Whether to recognize executables by magic number or extension.";
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type = types.enum [ "magic" "extension" ];
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};
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offset = mkOption {
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default = null;
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description = "The byte offset of the magic number used for recognition.";
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type = types.nullOr types.int;
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};
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magicOrExtension = mkOption {
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description = "The magic number or extension to match on.";
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type = types.str;
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};
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mask = mkOption {
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default = null;
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description = "A mask to be ANDed with the byte sequence of the file before matching";
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type = types.nullOr types.str;
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};
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interpreter = mkOption {
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description = ''
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The interpreter to invoke to run the program.
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Note that the actual registration will point to
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/run/binfmt/''${name}, so the kernel interpreter length
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limit doesn't apply.
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'';
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type = types.path;
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};
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preserveArgvZero = mkOption {
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default = false;
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description = ''
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Whether to pass the original argv[0] to the interpreter.
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See the description of the 'P' flag in the kernel docs
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for more details;
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'';
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type = types.bool;
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};
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openBinary = mkOption {
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default = config.matchCredentials;
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description = ''
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Whether to pass the binary to the interpreter as an open
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file descriptor, instead of a path.
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'';
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type = types.bool;
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};
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matchCredentials = mkOption {
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default = false;
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description = ''
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Whether to launch with the credentials and security
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token of the binary, not the interpreter (e.g. setuid
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bit).
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See the description of the 'C' flag in the kernel docs
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for more details.
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Implies/requires openBinary = true.
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'';
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type = types.bool;
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};
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fixBinary = mkOption {
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default = false;
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description = ''
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Whether to open the interpreter file as soon as the
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registration is loaded, rather than waiting for a
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relevant file to be invoked.
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See the description of the 'F' flag in the kernel docs
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for more details.
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'';
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type = types.bool;
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};
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wrapInterpreterInShell = mkOption {
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default = true;
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description = ''
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Whether to wrap the interpreter in a shell script.
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This allows a shell command to be set as the interpreter.
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'';
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type = types.bool;
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};
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interpreterSandboxPath = mkOption {
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internal = true;
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default = null;
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description = ''
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Path of the interpreter to expose in the build sandbox.
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'';
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type = types.nullOr types.path;
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};
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};
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}));
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};
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emulatedSystems = mkOption {
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default = [];
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example = [ "wasm32-wasi" "x86_64-windows" "aarch64-linux" ];
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description = ''
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List of systems to emulate. Will also configure Nix to
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||||||
|
support your new systems.
|
||||||
|
Warning: the builder can execute all emulated systems within the same build, which introduces impurities in the case of cross compilation.
|
||||||
|
'';
|
||||||
|
type = types.listOf (types.enum (builtins.attrNames magics));
|
||||||
|
};
|
||||||
|
|
||||||
|
addEmulatedSystemsToNixSandbox = mkOption {
|
||||||
|
type = types.bool;
|
||||||
|
default = true;
|
||||||
|
example = false;
|
||||||
|
description = ''
|
||||||
|
Whether to add the {option}`boot.binfmt.emulatedSystems` to {option}`nix.settings.extra-platforms`.
|
||||||
|
Disable this to use remote builders for those platforms, while allowing testing binaries locally.
|
||||||
|
'';
|
||||||
|
};
|
||||||
|
|
||||||
|
preferStaticEmulators = mkOption {
|
||||||
|
default = false;
|
||||||
|
description = ''
|
||||||
|
Whether to use static emulators when available.
|
||||||
|
|
||||||
|
This enables the kernel to preload the emulator binaries when
|
||||||
|
the binfmt registrations are added, obviating the need to make
|
||||||
|
the emulator binaries available inside chroots and chroot-like
|
||||||
|
sandboxes.
|
||||||
|
'';
|
||||||
|
type = types.bool;
|
||||||
|
};
|
||||||
|
};
|
||||||
|
};
|
||||||
|
|
||||||
|
config = {
|
||||||
|
assertions = lib.mapAttrsToList (name: reg: {
|
||||||
|
assertion = reg.fixBinary -> !reg.wrapInterpreterInShell;
|
||||||
|
message = "boot.binfmt.registrations.\"${name}\" cannot have fixBinary when the interpreter is invoked through a shell.";
|
||||||
|
}) cfg.registrations;
|
||||||
|
|
||||||
|
boot.binfmt.registrations = builtins.listToAttrs (map (system: assert system != pkgs.stdenv.hostPlatform.system; {
|
||||||
|
name = system;
|
||||||
|
value = { config, ... }: let
|
||||||
|
elaborated = lib.systems.elaborate { inherit system; };
|
||||||
|
useStaticEmulator = cfg.preferStaticEmulators && elaborated.staticEmulatorAvailable pkgs;
|
||||||
|
interpreter = elaborated.emulator (if useStaticEmulator then pkgs.pkgsStatic else pkgs);
|
||||||
|
|
||||||
|
inherit (elaborated) qemuArch;
|
||||||
|
isQemu = "qemu-${qemuArch}" == baseNameOf interpreter;
|
||||||
|
|
||||||
|
interpreterReg = let
|
||||||
|
wrapperName = "qemu-${qemuArch}-binfmt-P";
|
||||||
|
wrapper = pkgs.wrapQemuBinfmtP wrapperName interpreter;
|
||||||
|
in
|
||||||
|
if isQemu && !useStaticEmulator then "${wrapper}/bin/${wrapperName}"
|
||||||
|
else interpreter;
|
||||||
|
in ({
|
||||||
|
preserveArgvZero = mkDefault isQemu;
|
||||||
|
|
||||||
|
interpreter = mkDefault interpreterReg;
|
||||||
|
fixBinary = mkDefault useStaticEmulator;
|
||||||
|
wrapInterpreterInShell = mkDefault (!config.preserveArgvZero && !config.fixBinary);
|
||||||
|
interpreterSandboxPath = mkDefault (dirOf (dirOf config.interpreter));
|
||||||
|
} // (magics.${system} or (throw "Cannot create binfmt registration for system ${system}")));
|
||||||
|
}) cfg.emulatedSystems);
|
||||||
|
nix.settings = lib.mkIf (cfg.addEmulatedSystemsToNixSandbox && cfg.emulatedSystems != []) {
|
||||||
|
extra-platforms = cfg.emulatedSystems ++ lib.optional pkgs.stdenv.hostPlatform.isx86_64 "i686-linux";
|
||||||
|
extra-sandbox-paths = let
|
||||||
|
ruleFor = system: cfg.registrations.${system};
|
||||||
|
hasWrappedRule = lib.any (system: (ruleFor system).wrapInterpreterInShell) cfg.emulatedSystems;
|
||||||
|
in [ "/run/binfmt" ]
|
||||||
|
++ lib.optional hasWrappedRule "${pkgs.bash}"
|
||||||
|
++ (map (system: (ruleFor system).interpreterSandboxPath) cfg.emulatedSystems);
|
||||||
|
};
|
||||||
|
|
||||||
|
environment.etc."binfmt.d/nixos.conf".source = builtins.toFile "binfmt_nixos.conf"
|
||||||
|
(lib.concatStringsSep "\n" (lib.mapAttrsToList makeBinfmtLine config.boot.binfmt.registrations));
|
||||||
|
|
||||||
|
systemd = lib.mkMerge [
|
||||||
|
({ tmpfiles.rules = [
|
||||||
|
"d /run/binfmt 0755 -"
|
||||||
|
] ++ lib.mapAttrsToList
|
||||||
|
(name: interpreter:
|
||||||
|
"L+ /run/binfmt/${name} - - - - ${interpreter}"
|
||||||
|
)
|
||||||
|
(lib.mapAttrs mkInterpreter config.boot.binfmt.registrations);
|
||||||
|
})
|
||||||
|
|
||||||
|
(lib.mkIf (config.boot.binfmt.registrations != {}) {
|
||||||
|
additionalUpstreamSystemUnits = [
|
||||||
|
"proc-sys-fs-binfmt_misc.automount"
|
||||||
|
"proc-sys-fs-binfmt_misc.mount"
|
||||||
|
"systemd-binfmt.service"
|
||||||
|
];
|
||||||
|
services.systemd-binfmt.after = [ "systemd-tmpfiles-setup.service" ];
|
||||||
|
services.systemd-binfmt.restartTriggers = [ (builtins.toJSON config.boot.binfmt.registrations) ];
|
||||||
|
})
|
||||||
|
];
|
||||||
|
};
|
||||||
|
}
|
||||||
|
|
@ -1,9 +1,21 @@
|
||||||
{ config, pkgs, lib, ... }:
|
{ config, pkgs, lib, modulesPath, ... }:
|
||||||
|
|
||||||
{
|
{
|
||||||
# Bootloader
|
# Bootloader
|
||||||
boot.loader.systemd-boot.enable = true;
|
boot.loader.systemd-boot.enable = true;
|
||||||
boot.loader.efi.canTouchEfiVariables = true;
|
boot.loader.efi.canTouchEfiVariables = true;
|
||||||
|
|
||||||
|
# for testing only, not for building
|
||||||
|
# (from ./binfmt.nix)
|
||||||
|
boot.binfmt.addEmulatedSystemsToNixSandbox = false;
|
||||||
|
boot.binfmt.emulatedSystems = [
|
||||||
|
"aarch64-linux"
|
||||||
|
"armv7l-linux"
|
||||||
|
"riscv64-linux"
|
||||||
|
];
|
||||||
|
#nix.settings.system = "x86_64-linux";
|
||||||
|
#nix.settings.extra-platforms = [ "i686-linux" ];
|
||||||
|
|
||||||
boot.kernel.sysctl."vm.swappiness" = lib.mkDefault 10; # 0-100, commonly 60
|
boot.kernel.sysctl."vm.swappiness" = lib.mkDefault 10; # 0-100, commonly 60
|
||||||
boot.kernelModules = [ "xhci_pci" ]; # add driver to stage-1 to make the usb dock not prevent boot - https://github.com/NixOS/nixpkgs/issues/171625#issuecomment-2068283656
|
boot.kernelModules = [ "xhci_pci" ]; # add driver to stage-1 to make the usb dock not prevent boot - https://github.com/NixOS/nixpkgs/issues/171625#issuecomment-2068283656
|
||||||
|
|
||||||
|
|
@ -26,6 +38,12 @@
|
||||||
#hardware.nvidia.prime.nvidiaBusId = "PCI:1:00:0";
|
#hardware.nvidia.prime.nvidiaBusId = "PCI:1:00:0";
|
||||||
|
|
||||||
imports = [
|
imports = [
|
||||||
|
{
|
||||||
|
/* disabledModules = [ "${modulesPath}/nixos/modules/system/boot/binfmt.nix" ]; */
|
||||||
|
disabledModules = [ "system/boot/binfmt.nix" ];
|
||||||
|
imports = [ ./binfmt.nix ];
|
||||||
|
}
|
||||||
|
|
||||||
./hardware-configuration.nix
|
./hardware-configuration.nix
|
||||||
../../../profiles/sshd.nix
|
../../../profiles/sshd.nix
|
||||||
../../../profiles/no-suspend.nix
|
../../../profiles/no-suspend.nix
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue