273 lines
6.5 KiB
Bash
273 lines
6.5 KiB
Bash
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#!/bin/bash
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 2017 by Changbin Du <changbin.du@intel.com>
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#
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# Adapted from code in arch/x86/boot/Makefile by H. Peter Anvin and others
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#
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# "make fdimage/fdimage144/fdimage288/hdimage/isoimage"
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# script for x86 architecture
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#
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# Arguments:
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# $1 - fdimage format
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# $2 - target image file
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# $3 - kernel bzImage file
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# $4 - mtools configuration file
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# $5 - kernel cmdline
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# $6+ - initrd image file(s)
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#
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# This script requires:
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# bash
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# syslinux
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# mtools (for fdimage* and hdimage)
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# edk2/OVMF (for hdimage)
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#
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# Otherwise try to stick to POSIX shell commands...
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#
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# Use "make V=1" to debug this script
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case "${KBUILD_VERBOSE}" in
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*1*)
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set -x
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;;
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esac
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# Exit the top-level shell with an error
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topshell=$$
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trap 'exit 1' USR1
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die() {
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echo "" 1>&2
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echo " *** $*" 1>&2
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echo "" 1>&2
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kill -USR1 $topshell
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}
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# Verify the existence and readability of a file
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verify() {
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if [ ! -f "$1" -o ! -r "$1" ]; then
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die "Missing file: $1"
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fi
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}
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diskfmt="$1"
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FIMAGE="$2"
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FBZIMAGE="$3"
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MTOOLSRC="$4"
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KCMDLINE="$5"
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shift 5 # Remaining arguments = initrd files
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export MTOOLSRC
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# common options for dd
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dd='dd iflag=fullblock'
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# Make sure the files actually exist
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verify "$FBZIMAGE"
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declare -a FDINITRDS
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irdpfx=' initrd='
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initrdopts_syslinux=''
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initrdopts_efi=''
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for f in "$@"; do
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if [ -f "$f" -a -r "$f" ]; then
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FDINITRDS=("${FDINITRDS[@]}" "$f")
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fname="$(basename "$f")"
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initrdopts_syslinux="${initrdopts_syslinux}${irdpfx}${fname}"
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irdpfx=,
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initrdopts_efi="${initrdopts_efi} initrd=${fname}"
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fi
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done
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# Read a $3-byte littleendian unsigned value at offset $2 from file $1
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le() {
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local n=0
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local m=1
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for b in $(od -A n -v -j $2 -N $3 -t u1 "$1"); do
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n=$((n + b*m))
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m=$((m * 256))
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done
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echo $n
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}
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# Get the EFI architecture name such that boot{name}.efi is the default
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# boot file name. Returns false with no output if the file is not an
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# EFI image or otherwise unknown.
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efiarch() {
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[ -f "$1" ] || return
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[ $(le "$1" 0 2) -eq 23117 ] || return # MZ magic
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peoffs=$(le "$1" 60 4) # PE header offset
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[ $peoffs -ge 64 ] || return
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[ $(le "$1" $peoffs 4) -eq 17744 ] || return # PE magic
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case $(le "$1" $((peoffs+4+20)) 2) in # PE type
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267) ;; # PE32
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523) ;; # PE32+
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*) return 1 ;; # Invalid
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esac
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[ $(le "$1" $((peoffs+4+20+68)) 2) -eq 10 ] || return # EFI app
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case $(le "$1" $((peoffs+4)) 2) in # Machine type
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332) echo i386 ;;
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450) echo arm ;;
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512) echo ia64 ;;
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20530) echo riscv32 ;;
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20580) echo riscv64 ;;
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20776) echo riscv128 ;;
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34404) echo x64 ;;
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43620) echo aa64 ;;
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esac
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}
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# Get the combined sizes in bytes of the files given, counting sparse
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# files as full length, and padding each file to cluster size
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cluster=16384
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filesizes() {
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local t=0
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local s
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for s in $(ls -lnL "$@" 2>/dev/null | awk '/^-/{ print $5; }'); do
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t=$((t + ((s+cluster-1)/cluster)*cluster))
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done
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echo $t
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}
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# Expand directory names which should be in /usr/share into a list
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# of possible alternatives
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sharedirs() {
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local dir file
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for dir in /usr/share /usr/lib64 /usr/lib; do
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for file; do
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echo "$dir/$file"
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echo "$dir/${file^^}"
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done
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done
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}
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efidirs() {
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local dir file
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for dir in /usr/share /boot /usr/lib64 /usr/lib; do
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for file; do
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echo "$dir/$file"
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echo "$dir/${file^^}"
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done
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done
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}
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findsyslinux() {
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local f="$(find -L $(sharedirs syslinux isolinux) \
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-name "$1" -readable -type f -print -quit 2>/dev/null)"
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if [ ! -f "$f" ]; then
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die "Need a $1 file, please install syslinux/isolinux."
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fi
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echo "$f"
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return 0
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}
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findovmf() {
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local arch="$1"
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shift
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local -a names=(-false)
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local name f
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for name; do
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names=("${names[@]}" -or -iname "$name")
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done
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for f in $(find -L $(efidirs edk2 ovmf) \
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\( "${names[@]}" \) -readable -type f \
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-print 2>/dev/null); do
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if [ "$(efiarch "$f")" = "$arch" ]; then
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echo "$f"
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return 0
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fi
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done
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die "Need a $1 file for $arch, please install EDK2/OVMF."
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}
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do_mcopy() {
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if [ ${#FDINITRDS[@]} -gt 0 ]; then
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mcopy "${FDINITRDS[@]}" "$1"
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fi
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if [ -n "$efishell" ]; then
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mmd "$1"EFI "$1"EFI/Boot
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mcopy "$efishell" "$1"EFI/Boot/boot${kefiarch}.efi
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fi
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if [ -n "$kefiarch" ]; then
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echo linux "$KCMDLINE$initrdopts_efi" | \
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mcopy - "$1"startup.nsh
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fi
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echo default linux "$KCMDLINE$initrdopts_syslinux" | \
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mcopy - "$1"syslinux.cfg
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mcopy "$FBZIMAGE" "$1"linux
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}
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genbzdisk() {
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verify "$MTOOLSRC"
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mformat -v 'LINUX_BOOT' a:
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syslinux "$FIMAGE"
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do_mcopy a:
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}
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genfdimage144() {
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verify "$MTOOLSRC"
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$dd if=/dev/zero of="$FIMAGE" bs=1024 count=1440 2>/dev/null
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mformat -v 'LINUX_BOOT' v:
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syslinux "$FIMAGE"
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do_mcopy v:
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}
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genfdimage288() {
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verify "$MTOOLSRC"
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$dd if=/dev/zero of="$FIMAGE" bs=1024 count=2880 2>/dev/null
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mformat -v 'LINUX_BOOT' w:
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syslinux "$FIMAGE"
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do_mcopy w:
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}
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genhdimage() {
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verify "$MTOOLSRC"
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mbr="$(findsyslinux mbr.bin)"
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kefiarch="$(efiarch "$FBZIMAGE")"
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if [ -n "$kefiarch" ]; then
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# The efishell provides command line handling
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efishell="$(findovmf $kefiarch shell.efi shell${kefiarch}.efi)"
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ptype='-T 0xef' # EFI system partition, no GPT
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fi
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sizes=$(filesizes "$FBZIMAGE" "${FDINITRDS[@]}" "$efishell")
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# Allow 1% + 2 MiB for filesystem and partition table overhead,
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# syslinux, and config files; this is probably excessive...
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megs=$(((sizes + sizes/100 + 2*1024*1024 - 1)/(1024*1024)))
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$dd if=/dev/zero of="$FIMAGE" bs=$((1024*1024)) count=$megs 2>/dev/null
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mpartition -I -c -s 32 -h 64 $ptype -b 64 -a p:
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$dd if="$mbr" of="$FIMAGE" bs=440 count=1 conv=notrunc 2>/dev/null
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mformat -v 'LINUX_BOOT' -s 32 -h 64 -c $((cluster/512)) -t $megs h:
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syslinux --offset $((64*512)) "$FIMAGE"
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do_mcopy h:
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}
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geniso() {
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tmp_dir="$(dirname "$FIMAGE")/isoimage"
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rm -rf "$tmp_dir"
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mkdir "$tmp_dir"
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isolinux=$(findsyslinux isolinux.bin)
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ldlinux=$(findsyslinux ldlinux.c32)
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cp "$isolinux" "$ldlinux" "$tmp_dir"
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cp "$FBZIMAGE" "$tmp_dir"/linux
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echo default linux "$KCMDLINE" > "$tmp_dir"/isolinux.cfg
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cp "${FDINITRDS[@]}" "$tmp_dir"/
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genisoimage -J -r -appid 'LINUX_BOOT' -input-charset=utf-8 \
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-quiet -o "$FIMAGE" -b isolinux.bin \
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-c boot.cat -no-emul-boot -boot-load-size 4 \
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-boot-info-table "$tmp_dir"
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isohybrid "$FIMAGE" 2>/dev/null || true
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rm -rf "$tmp_dir"
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}
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rm -f "$FIMAGE"
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case "$diskfmt" in
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bzdisk) genbzdisk;;
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fdimage144) genfdimage144;;
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fdimage288) genfdimage288;;
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hdimage) genhdimage;;
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isoimage) geniso;;
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*) die "Unknown image format: $diskfmt";;
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esac
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