This will make it easier to dual-boot Spectrum with other operating systems, and hopefully make it possible to avoid chainloading (which has firmware compatibility issues) in the combined image. We're not exactly following Boot Loader Specification[1] best practices here — we don't namespace installation by version or machine-id. But it's better than what we had before, and I think it'll be easier to figure out what to do about namespacing once we've figured out how updates will work. [1]: https://systemd.io/BOOT_LOADER_SPECIFICATION/ Cc: Puck Meerburg --- img/live/Makefile | 23 +++++++++++------------ img/live/default.nix | 2 +- img/live/etc/os-release | 5 ----- 3 files changed, 12 insertions(+), 18 deletions(-) delete mode 100644 img/live/etc/os-release diff --git a/img/live/Makefile b/img/live/Makefile index 8f47028..1277431 100644 --- a/img/live/Makefile +++ b/img/live/Makefile @@ -22,22 +22,21 @@ build/live.img: $(SCRIPTS)/format-uuid.sh $(SCRIPTS)/make-gpt.sh build/boot.fat $(EXT_FS):9293e1ff-cee4-4658-88be-898ec863944f mv $@.tmp $@ -build/cmdline: build/rootfs.verity.roothash - printf "ro console=ttyS0 roothash=" > $@ +build/spectrum.conf: build/rootfs.verity.roothash + printf "title Spectrum\n" > $@ + printf "linux /spectrum/linux\n" >> $@ + printf "initrd /spectrum/initrd\n" >> $@ + printf "options ro console=ttyS0 roothash=" >> $@ cat build/rootfs.verity.roothash >> $@ -build/bootx64.efi: etc/os-release build/cmdline $(INITRAMFS) - $(OBJCOPY) --add-section .osrel=etc/os-release --change-section-vma .osrel=0x20000 \ - --add-section .cmdline=build/cmdline --change-section-vma .cmdline=0x30000 \ - --add-section .linux=$(KERNEL) --change-section-vma .linux=0x40000 \ - --add-section .initrd=$(INITRAMFS) --change-section-vma .initrd=0x3000000 \ - $(EFI_STUB) $@ - -build/boot.fat: build/bootx64.efi +build/boot.fat: $(KERNEL) $(INITRAMFS) $(SYSTEMD_BOOT_EFI) build/spectrum.conf $(TRUNCATE) -s 220200960 $@ $(MKFS_FAT) $@ - $(MMD) -i $@ ::/EFI ::/EFI/BOOT - $(MCOPY) -i $@ build/bootx64.efi ::/EFI/BOOT + $(MMD) -i $@ ::/EFI ::/EFI/BOOT ::/loader ::/loader/entries ::/spectrum + $(MCOPY) -i $@ build/spectrum.conf ::/loader/entries + $(MCOPY) -i $@ $(KERNEL) ::/spectrum/linux + $(MCOPY) -i $@ $(INITRAMFS) ::/spectrum/initrd + $(MCOPY) -i $@ $(SYSTEMD_BOOT_EFI) ::/EFI/BOOT/BOOTX64.EFI # veritysetup format produces two files, but Make only (portably) # supports one output per rule, so we combine the two outputs then diff --git a/img/live/default.nix b/img/live/default.nix index c9cd354..bebc1c1 100644 --- a/img/live/default.nix +++ b/img/live/default.nix @@ -26,11 +26,11 @@ stdenv.mkDerivation { nativeBuildInputs = [ cryptsetup dosfstools jq mtools util-linux ]; - EFI_STUB = "${systemd}/lib/systemd/boot/efi/linuxx64.efi.stub"; EXT_FS = extfs; INITRAMFS = initramfs; KERNEL = "${rootfs.kernel}/${stdenv.hostPlatform.linux-kernel.target}"; ROOT_FS = rootfs; + SYSTEMD_BOOT_EFI = "${systemd}/lib/systemd/boot/efi/systemd-bootx64.efi"; buildFlags = [ "build/live.img" ]; makeFlags = [ "SCRIPTS=${scripts}" ]; diff --git a/img/live/etc/os-release b/img/live/etc/os-release deleted file mode 100644 index 7980810..0000000 --- a/img/live/etc/os-release +++ /dev/null @@ -1,5 +0,0 @@ -# SPDX-FileCopyrightText: 2021 Alyssa Ross -# SPDX-License-Identifier: CC0-1.0 - -PRETTY_NAME="Spectrum" -VERSION_ID=0.1 -- 2.35.1

Some UEFI implementations (like the one on Ville's Thinkpad P43s) failed to chainload Spectrum from GRUB. Now that Spectrum has a proper bootloader, we can avoid that chainloading entirely, which will hopefully make the broken firmware happier. Reported-by: Ville Ilvonen Cc: Puck Meerburg --- img/combined/default.nix | 10 ++++++++++ img/combined/grub.cfg.in | 5 +++-- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/img/combined/default.nix b/img/combined/default.nix index 86e07e2..16cd506 100644 --- a/img/combined/default.nix +++ b/img/combined/default.nix @@ -35,6 +35,16 @@ let grubCfg = substituteAll { src = ./grub.cfg.in; + + nativeBuildInputs = [ mtools ]; + + preInstall = '' + export spectrumKernelParams="$( + mcopy -i ${eosimages.image}@@1M ::/loader/entries/spectrum.conf - | + grep '^options ' | + sed 's/^options //')" + ''; + linux = removePrefix storeDir installer.kernel; initrd = removePrefix storeDir installer.initramfs; inherit (installer) kernelParams; diff --git a/img/combined/grub.cfg.in b/img/combined/grub.cfg.in index 1a91a75..31b09d6 100644 --- a/img/combined/grub.cfg.in +++ b/img/combined/grub.cfg.in @@ -1,5 +1,5 @@ # SPDX-License-Identifier: EUPL-1.2 -# SPDX-FileCopyrightText: 2021 Alyssa Ross +# SPDX-FileCopyrightText: 2021-2022 Alyssa Ross insmod efi_gop insmod efi_uga @@ -13,7 +13,8 @@ terminal_output gfxterm menuentry "Try Spectrum" { loopback live (hd0,gpt3)/Spectrum-0.0-x86_64-generic.0.Live.img - chainloader (live,gpt1)/efi/boot/bootx64.efi + linux (live,gpt1)/spectrum/linux @spectrumKernelParams@ + initrd (live,gpt1)/spectrum/initrd } menuentry "Install Spectrum" { -- 2.35.1