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Add a script to wrap an initrd into an EFI application

This commit is contained in:
Julian Stecklina 2022-11-23 13:11:22 +01:00
parent dea1ab9798
commit 60b269b69c
1 changed files with 19 additions and 1 deletions
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20
flake.nix
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@ -75,6 +75,23 @@
lanzatool = buildRustLinuxApp ./rust/lanzatool; lanzatool = buildRustLinuxApp ./rust/lanzatool;
# A script that takes an initrd and turns it into a PE image.
wrapInitrd = pkgs.writeShellScriptBin "wrap-initrd" ''
set -eu
STUB=${initrd-stub}/bin/initrd-stub.efi
INITRD=$1
OUT=$2
stub_line=$(objdump -h "$STUB" | tail -2 | head -1)
stub_size=0x$(echo "$stub_line" | awk '{print $3}')
stub_offs=0x$(echo "$stub_line" | awk '{print $4}')
initrd_offs=$((stub_size + stub_offs))
objcopy --add-section .initrd="$INITRD" --change-section-vma .initrd=$(printf 0x%x $initrd_offs) \
"$STUB" "$OUT"
'';
osrel = pkgs.writeText "lanzaboote-osrel" '' osrel = pkgs.writeText "lanzaboote-osrel" ''
NAME=Lanzaboote NAME=Lanzaboote
VERSION="${lanzaboote.version}" VERSION="${lanzaboote.version}"
@ -93,7 +110,7 @@
''; '';
in { in {
packages.x86_64-linux = { packages.x86_64-linux = {
inherit qemuUefi uefi-run lanzaboote lanzaboote-uki lanzatool; inherit qemuUefi uefi-run initrd-stub lanzaboote lanzaboote-uki lanzatool wrapInitrd;
default = lanzaboote-uki; default = lanzaboote-uki;
}; };
@ -104,6 +121,7 @@
rust-nightly rust-nightly
lanzatool lanzatool
pkgs.openssl pkgs.openssl
wrapInitrd
]; ];
}; };
}; };