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|
{
outputs = { self, nixpkgs }:
let
system = "x86_64-linux";
pkgs = import nixpkgs {
inherit system;
config.allowUnfree = true;
overlays = [
(self: super: {
inherit cross rv32Pkgs;
})
];
};
crossSystem = "arm-linux";
cross = import nixpkgs {
inherit system;
config.allowUnsupportedSystem = true;
crossSystem = {
config = "arm-unknown-linux-gnueabi";
gcc = {
# > Switch "--with-arch" may not be used with switch "--with-cpu"
# > make[1]: *** [Makefile:4315: configure-gcc] Error 1
#arch = "armv4";
# Ver SA110 en arch/arm/mm/Kconfig, es parecido
cpu = "arm810";
};
linux-kernel = {
name = "taller";
target = "uImage";
makeFlags = [ "LOADADDR=0x8000" ];
autoModules = false;
baseConfig = "taller_defconfig";
};
};
# Tomó mucho conseguir esta expresión: horas de leer nixpkgs, prueba y error
crossOverlays = [
(final: prev: {
stdenv = prev.stdenvAdapters.overrideCC prev.stdenv (prev.stdenv.cc.override {
bintools = prev.stdenv.cc.bintools.override {
bintools = prev.stdenv.cc.bintools.bintools.overrideAttrs (prev: {
patches = prev.patches ++ [
./nix/gas-config-tc-arm-disable-instruction-support-check.patch
];
});
};
});
})
];
};
rv32Pkgs = import nixpkgs {
inherit system;
config.allowUnsupportedSystem = true;
crossSystem = {
config = "riscv32-none-elf";
gcc = {
arch = "rv32imafc";
abi = "ilp32f";
};
};
};
in
{
formatter.${system} = pkgs.nixpkgs-fmt;
# Tomado de pkgs/build-support/vm/default.nix
packages."${crossSystem}".proof-of-concept = cross.makeInitrd {
contents = [
{
symlink = "/init";
object = with cross; let
initrdUtils = runCommand "initrd-utils"
{
nativeBuildInputs = [ buildPackages.nukeReferences ];
allowedReferences = [ "out" ]; # prevent accidents like glibc being included in the initrd
}
''
mkdir -p $out/bin
mkdir -p $out/lib
# Copy what we need from Glibc.
cp -p ${cross.glibc.out}/lib/ld-linux*.so.? $out/lib
cp -p ${cross.glibc.out}/lib/libc.so.* $out/lib
cp -p ${cross.glibc.out}/lib/libm.so.* $out/lib
cp -p ${cross.glibc.out}/lib/libresolv.so.* $out/lib
# Copy BusyBox.
cp -pd ${cross.busybox}/bin/* $out/bin
# Run patchelf to make the programs refer to the copied libraries.
for i in $out/bin/* $out/lib/*; do if ! test -L $i; then nuke-refs $i; fi; done
for i in $out/bin/*; do
if [ -f "$i" -a ! -L "$i" ]; then
echo "patching $i..."
patchelf --set-interpreter $out/lib/ld-linux*.so.? --set-rpath $out/lib $i || true
fi
done
'';
path = lib.makeSearchPath "bin" [
#bashInteractive
#coreutils-full
#gnugrep
#neofetch
#util-linux
];
in
writeScript "init" ''
#!${initrdUtils}/bin/ash
export PATH=${initrdUtils}/bin
mkdir -p /dev /etc /proc /sys
echo -n > /etc/fstab
mount -t devtmpfs devtmpfs /dev
mount -t proc none /proc
mount -t sysfs none /sys
exec ash
'';
}
];
};
devShells."${system}" = import ./nix/shells.nix { inherit pkgs; };
};
}
|
