mirror of
https://github.com/fosslinux/live-bootstrap.git
synced 2026-03-02 01:18:08 +01:00
a2fcf1ced9
A tiny bootloader bootstrap has been added to compile the builder-hex0 kernel from hex0 source. The boot compiler is builder-hex0-x86-stage1.hex0 and builder-hex0-x86-stage1.bin. The builder-hex0 kernel is now named builder-hex0-x86-stage2.hex0. The inclusion of a binary seed resolves the problem with the previous strategy which used an architecture-specific hex0 compiler. If sysb detects a full disk (i.e. DISK=sda) it now partitions the disk unconditionally because previously fdisk was reporting existing but empty partitions which resulted in no parititions being created. e2fsprogs is now built with --disable-tls because musl was built on Fiwix without full threading support and mkfs.ext4 was crashing without disabling thread local storage. kexec-linux writes the linux kernel and initramfs to a RAM drive on Fiwix which ensure a pre-allocated contiguous memory block. The following is written to the ram drive: a 32-bit number which is the size of the kernel in bytes, a 32-bit number which is the size of the initramfs in bytes, followed by the Linux kernel image, followed by the initramfs. kexec-fiwix invokes a sync syscall to ensure all writes are flushed to the ram drive and then initiates the kexec by shutting down Fiwix with a reboot syscall. Fiwix knows whether and how to perform the kexec based on kernel parameters passed to it.
95 lines
2.6 KiB
Bash
Executable file
95 lines
2.6 KiB
Bash
Executable file
#!/usr/bin/bash
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# SPDX-FileCopyrightText: 2021-22 fosslinux <fosslinux@aussies.space>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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set -e
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# shellcheck source=/dev/null
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. .env
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# shellcheck source=sysa/helpers.sh
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. helpers.sh
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# Unload the current kernel before things go weird
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kexec -u
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create_hdx() {
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# Create all of the sd{a,b,c..}
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minor=0
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alpha="a b c d e f g h i j k l m n o p" # 16 disks -- more than enough
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# For each disk...
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for a in ${alpha}; do
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mknod -m 600 "/dev/sd${a}" b 8 "$((minor++))"
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# For each partition...
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for p in $(seq 15); do
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mknod -m 600 "/dev/sd${a}${p}" b 8 "$((minor++))"
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done
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done
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}
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# All the various structures that don't exist but needed to mount
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mkdir -p /etc /dev
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populate_device_nodes
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create_hdx
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ask_disk() {
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echo
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echo "What disk would you like to use for live-bootstrap?"
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echo "This disk may have pre-prepared sources on it."
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echo "If there is no partition we will make one".
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echo "Please provide in format sdxx (as you would find under /dev),"
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echo "or sdx if it is a blank disk. An ext4 partition is expected on"
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echo "existing disks."
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echo "You can type 'list' to get a list of disks to help you figure"
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echo "out which is the right disk."
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echo "NO WARRANTY IS PROVIDED FOR BUGGY BEHAVIOUR, INCLUDING THAT"
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echo "REGARDING DISKS & DATA."
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echo
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read -r DISK
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if [ "${DISK}" = "list" ]; then
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fdisk -l
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ask_disk
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elif [ -z "${DISK}" ] || ! [ -e "/dev/${DISK}" ]; then
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echo "Invalid."
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ask_disk
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fi
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}
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if [ -z "${DISK}" ] || ! [ -e "/dev/${DISK}" ]; then
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echo "You did not provide a valid disk in the configuration file."
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ask_disk
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echo "DISK=${DISK}" >> /usr/src/bootstrap.cfg
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fi
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# Is it a full disk, and not a partition?
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# shellcheck disable=SC2012
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if [ $(($(ls -l "/dev/${DISK}" | sed "s/.*, *//" | sed "s/ .*//") % 8)) -eq 0 ]; then
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echo "Creating partition table..."
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echo ";" | sfdisk "/dev/${DISK}"
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fdisk -l "/dev/${DISK}"
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echo "Creating ext4 partition..."
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mkfs.ext4 "/dev/${DISK}1"
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DISK="${DISK}1"
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fi
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echo "export DISK=${DISK}" >> /usr/src/bootstrap.cfg
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SYSC=/sysc
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# Otherwise, add stuff from sysa to sysb
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echo "Mounting sysc"
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mkdir /sysc
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mount -t ext4 "/dev/${DISK}" /sysc
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# Copy over appropriate data
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echo "Copying data into sysc"
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sys_transfer "${SYSC}" /sysc_src gzip patch
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sync
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# switch_root into sysc 1. for simplicity 2. to avoid kexecing again
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# spouts a few errors because we don't have /proc /sys or /dev mounted
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echo "Switching into sysc"
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exec switch_root /sysc /init
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