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Diffstat (limited to 'arch/x86/boot/genimage.sh')
| -rw-r--r-- | arch/x86/boot/genimage.sh | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/arch/x86/boot/genimage.sh b/arch/x86/boot/genimage.sh new file mode 100644 index 000000000..c9299aeb7 --- /dev/null +++ b/arch/x86/boot/genimage.sh @@ -0,0 +1,272 @@ +#!/bin/bash +# +# This file is subject to the terms and conditions of the GNU General Public +# License. See the file "COPYING" in the main directory of this archive +# for more details. +# +# Copyright (C) 2017 by Changbin Du <changbin.du@intel.com> +# +# Adapted from code in arch/x86/boot/Makefile by H. Peter Anvin and others +# +# "make fdimage/fdimage144/fdimage288/hdimage/isoimage" +# script for x86 architecture +# +# Arguments: +# $1 - fdimage format +# $2 - target image file +# $3 - kernel bzImage file +# $4 - mtools configuration file +# $5 - kernel cmdline +# $6+ - initrd image file(s) +# +# This script requires: +# bash +# syslinux +# mtools (for fdimage* and hdimage) +# edk2/OVMF (for hdimage) +# +# Otherwise try to stick to POSIX shell commands... +# + +# Use "make V=1" to debug this script +case "${KBUILD_VERBOSE}" in +*1*) + set -x + ;; +esac + +# Exit the top-level shell with an error +topshell=$$ +trap 'exit 1' USR1 +die() { + echo "" 1>&2 + echo " *** $*" 1>&2 + echo "" 1>&2 + kill -USR1 $topshell +} + +# Verify the existence and readability of a file +verify() { + if [ ! -f "$1" -o ! -r "$1" ]; then + die "Missing file: $1" + fi +} + +diskfmt="$1" +FIMAGE="$2" +FBZIMAGE="$3" +MTOOLSRC="$4" +KCMDLINE="$5" +shift 5 # Remaining arguments = initrd files + +export MTOOLSRC + +# common options for dd +dd='dd iflag=fullblock' + +# Make sure the files actually exist +verify "$FBZIMAGE" + +declare -a FDINITRDS +irdpfx=' initrd=' +initrdopts_syslinux='' +initrdopts_efi='' +for f in "$@"; do + if [ -f "$f" -a -r "$f" ]; then + FDINITRDS=("${FDINITRDS[@]}" "$f") + fname="$(basename "$f")" + initrdopts_syslinux="${initrdopts_syslinux}${irdpfx}${fname}" + irdpfx=, + initrdopts_efi="${initrdopts_efi} initrd=${fname}" + fi +done + +# Read a $3-byte littleendian unsigned value at offset $2 from file $1 +le() { + local n=0 + local m=1 + for b in $(od -A n -v -j $2 -N $3 -t u1 "$1"); do + n=$((n + b*m)) + m=$((m * 256)) + done + echo $n +} + +# Get the EFI architecture name such that boot{name}.efi is the default +# boot file name. Returns false with no output if the file is not an +# EFI image or otherwise unknown. +efiarch() { + [ -f "$1" ] || return + [ $(le "$1" 0 2) -eq 23117 ] || return # MZ magic + peoffs=$(le "$1" 60 4) # PE header offset + [ $peoffs -ge 64 ] || return + [ $(le "$1" $peoffs 4) -eq 17744 ] || return # PE magic + case $(le "$1" $((peoffs+4+20)) 2) in # PE type + 267) ;; # PE32 + 523) ;; # PE32+ + *) return 1 ;; # Invalid + esac + [ $(le "$1" $((peoffs+4+20+68)) 2) -eq 10 ] || return # EFI app + case $(le "$1" $((peoffs+4)) 2) in # Machine type + 332) echo i386 ;; + 450) echo arm ;; + 512) echo ia64 ;; + 20530) echo riscv32 ;; + 20580) echo riscv64 ;; + 20776) echo riscv128 ;; + 34404) echo x64 ;; + 43620) echo aa64 ;; + esac +} + +# Get the combined sizes in bytes of the files given, counting sparse +# files as full length, and padding each file to cluster size +cluster=16384 +filesizes() { + local t=0 + local s + for s in $(ls -lnL "$@" 2>/dev/null | awk '/^-/{ print $5; }'); do + t=$((t + ((s+cluster-1)/cluster)*cluster)) + done + echo $t +} + +# Expand directory names which should be in /usr/share into a list +# of possible alternatives +sharedirs() { + local dir file + for dir in /usr/share /usr/lib64 /usr/lib; do + for file; do + echo "$dir/$file" + echo "$dir/${file^^}" + done + done +} +efidirs() { + local dir file + for dir in /usr/share /boot /usr/lib64 /usr/lib; do + for file; do + echo "$dir/$file" + echo "$dir/${file^^}" + done + done +} + +findsyslinux() { + local f="$(find -L $(sharedirs syslinux isolinux) \ + -name "$1" -readable -type f -print -quit 2>/dev/null)" + if [ ! -f "$f" ]; then + die "Need a $1 file, please install syslinux/isolinux." + fi + echo "$f" + return 0 +} + +findovmf() { + local arch="$1" + shift + local -a names=(-false) + local name f + for name; do + names=("${names[@]}" -or -iname "$name") + done + for f in $(find -L $(efidirs edk2 ovmf) \ + \( "${names[@]}" \) -readable -type f \ + -print 2>/dev/null); do + if [ "$(efiarch "$f")" = "$arch" ]; then + echo "$f" + return 0 + fi + done + die "Need a $1 file for $arch, please install EDK2/OVMF." +} + +do_mcopy() { + if [ ${#FDINITRDS[@]} -gt 0 ]; then + mcopy "${FDINITRDS[@]}" "$1" + fi + if [ -n "$efishell" ]; then + mmd "$1"EFI "$1"EFI/Boot + mcopy "$efishell" "$1"EFI/Boot/boot${kefiarch}.efi + fi + if [ -n "$kefiarch" ]; then + echo linux "$KCMDLINE$initrdopts_efi" | \ + mcopy - "$1"startup.nsh + fi + echo default linux "$KCMDLINE$initrdopts_syslinux" | \ + mcopy - "$1"syslinux.cfg + mcopy "$FBZIMAGE" "$1"linux +} + +genbzdisk() { + verify "$MTOOLSRC" + mformat -v 'LINUX_BOOT' a: + syslinux "$FIMAGE" + do_mcopy a: +} + +genfdimage144() { + verify "$MTOOLSRC" + $dd if=/dev/zero of="$FIMAGE" bs=1024 count=1440 2>/dev/null + mformat -v 'LINUX_BOOT' v: + syslinux "$FIMAGE" + do_mcopy v: +} + +genfdimage288() { + verify "$MTOOLSRC" + $dd if=/dev/zero of="$FIMAGE" bs=1024 count=2880 2>/dev/null + mformat -v 'LINUX_BOOT' w: + syslinux "$FIMAGE" + do_mcopy w: +} + +genhdimage() { + verify "$MTOOLSRC" + mbr="$(findsyslinux mbr.bin)" + kefiarch="$(efiarch "$FBZIMAGE")" + if [ -n "$kefiarch" ]; then + # The efishell provides command line handling + efishell="$(findovmf $kefiarch shell.efi shell${kefiarch}.efi)" + ptype='-T 0xef' # EFI system partition, no GPT + fi + sizes=$(filesizes "$FBZIMAGE" "${FDINITRDS[@]}" "$efishell") + # Allow 1% + 2 MiB for filesystem and partition table overhead, + # syslinux, and config files; this is probably excessive... + megs=$(((sizes + sizes/100 + 2*1024*1024 - 1)/(1024*1024))) + $dd if=/dev/zero of="$FIMAGE" bs=$((1024*1024)) count=$megs 2>/dev/null + mpartition -I -c -s 32 -h 64 $ptype -b 64 -a p: + $dd if="$mbr" of="$FIMAGE" bs=440 count=1 conv=notrunc 2>/dev/null + mformat -v 'LINUX_BOOT' -s 32 -h 64 -c $((cluster/512)) -t $megs h: + syslinux --offset $((64*512)) "$FIMAGE" + do_mcopy h: +} + +geniso() { + tmp_dir="$(dirname "$FIMAGE")/isoimage" + rm -rf "$tmp_dir" + mkdir "$tmp_dir" + isolinux=$(findsyslinux isolinux.bin) + ldlinux=$(findsyslinux ldlinux.c32) + cp "$isolinux" "$ldlinux" "$tmp_dir" + cp "$FBZIMAGE" "$tmp_dir"/linux + echo default linux "$KCMDLINE" > "$tmp_dir"/isolinux.cfg + cp "${FDINITRDS[@]}" "$tmp_dir"/ + genisoimage -J -r -appid 'LINUX_BOOT' -input-charset=utf-8 \ + -quiet -o "$FIMAGE" -b isolinux.bin \ + -c boot.cat -no-emul-boot -boot-load-size 4 \ + -boot-info-table "$tmp_dir" + isohybrid "$FIMAGE" 2>/dev/null || true + rm -rf "$tmp_dir" +} + +rm -f "$FIMAGE" + +case "$diskfmt" in + bzdisk) genbzdisk;; + fdimage144) genfdimage144;; + fdimage288) genfdimage288;; + hdimage) genhdimage;; + isoimage) geniso;; + *) die "Unknown image format: $diskfmt";; +esac |