334 lines
16 KiB
Bash
Executable File
334 lines
16 KiB
Bash
Executable File
#!/bin/bash
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# ------------------------------ Part 1: Setup -------------------------------
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# Clear environment variables by restarting script w/bare minimum passed through
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[ -z "$NOCLEAR" ] && exec env -i NOCLEAR=1 HOME="$HOME" PATH="$PATH" \
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LINUX="$LINUX" CROSS="$CROSS" CROSS_COMPILE="$CROSS_COMPILE" "$0" "$@"
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! [ -d mkroot ] && echo "Run mkroot/mkroot.sh from toybox source dir." && exit 1
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# assign command line NAME=VALUE args to env vars, the rest are packages
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for i in "$@"; do
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[ "${i/=/}" != "$i" ] && export "$i" || { [ "$i" != -- ] && PKG="$PKG $i"; }
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done
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# Set default directory locations (overrideable from command line)
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: ${TOP:=$PWD/root} ${BUILD:=$TOP/build} ${LOG:=$BUILD/log}
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: ${AIRLOCK:=$BUILD/airlock} ${CCC:=$PWD/ccc} ${PKGDIR:=$PWD/mkroot/packages}
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announce() { printf "\033]2;$CROSS $*\007" >/dev/tty; printf "\n=== $*\n";}
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die() { echo "$@" >&2; exit 1; }
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# ----- Are we cross compiling (via CROSS_COMPILE= or CROSS=)
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if [ -n "$CROSS_COMPILE" ]; then
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# airlock needs absolute path
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[ -z "${X:=$(command -v "$CROSS_COMPILE"cc)}" ] && die "no ${CROSS_COMPILE}cc"
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CROSS_COMPILE="$(realpath -s "${X%cc}")"
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[ -z "$CROSS" ] && CROSS=${CROSS_COMPILE/*\//} CROSS=${CROSS/-*/}
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elif [ -n "$CROSS" ]; then # CROSS=all/allnonstop/$ARCH else list known $ARCHes
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[ ! -d "$CCC" ] && die "No ccc symlink to compiler directory."
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TARGETS="$(ls "$CCC" | sed -n 's/-.*//p' | sort -u)"
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if [ "${CROSS::3}" == all ]; then # loop calling ourselves for each target
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for i in $TARGETS; do
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"$0" "$@" CROSS=$i || [ "$CROSS" == allnonstop ] || exit 1
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done; exit
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else # Find matching cross compiler under ccc/ else list available targets
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CROSS_COMPILE="$(echo "$CCC/$CROSS"-*cross/bin/"$CROSS"*-cc)" # wildcard
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[ ! -e "$CROSS_COMPILE" ] && echo $TARGETS && exit # list available targets
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CROSS_COMPILE="${CROSS_COMPILE%cc}" # trim to prefix for cc/ld/as/nm/strip
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fi
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fi
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# Set per-target output directory (using "host" if not cross-compiling)
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: ${CROSS:=host} ${OUTPUT:=$TOP/$CROSS} ${OUTDOC:=$OUTPUT/docs}
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# Verify selected compiler works
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${CROSS_COMPILE}cc --static -xc - -o /dev/null <<< "int main(void){return 0;}"||
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die "${CROSS_COMPILE}cc can't create static binaries"
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# ----- Create hermetic build environment
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if [ -z "$NOAIRLOCK"] && [ -n "$CROSS_COMPILE" ]; then
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# When cross compiling set host $PATH to binaries with known behavior by
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# - building a host toybox later builds use as their command line
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# - cherry-picking specific commands from old path via symlink
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if [ ! -e "$AIRLOCK/toybox" ]; then
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announce "airlock" &&
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PREFIX="$AIRLOCK" KCONFIG_CONFIG=.singleconfig_airlock CROSS_COMPILE= \
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make clean defconfig toybox install_airlock && # see scripts/install.sh
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rm .singleconfig_airlock || exit 1
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fi
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export PATH="$AIRLOCK"
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fi
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# Create per-target work directories
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TEMP="$BUILD/${CROSS}-tmp" && rm -rf "$TEMP" &&
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mkdir -p "$TEMP" "$OUTPUT" "$LOG" || exit 1
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[ -z "$ROOT" ] && ROOT="$OUTPUT/fs" && rm -rf "$ROOT"
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LOG="$LOG/$CROSS"
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# ----- log build output
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# Install command line recording wrapper, logs all commands run from $PATH
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if [ -z "$NOLOGPATH" ]; then
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# Move cross compiler into $PATH so calls to it get logged
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[ -n "$CROSS_COMPILE" ] && PATH="${CROSS_COMPILE%/*}:$PATH" &&
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CROSS_COMPILE=${CROSS_COMPILE##*/}
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export WRAPDIR="$BUILD/record-commands" LOGPATH="$LOG"-commands.txt
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rm -rf "$WRAPDIR" "$LOGPATH" generated/obj &&
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WRAPDIR="$WRAPDIR" CROSS_COMPILE= NOSTRIP=1 source mkroot/record-commands ||
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exit 1
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fi
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# Start logging stdout/stderr
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rm -f "$LOG".{n,y} || exit 1
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[ -z "$NOLOG" ] && exec > >(tee "$LOG".n) 2>&1
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echo "Building for $CROSS"
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# ---------------------- Part 2: Create root filesystem -----------------------
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# ----- Create new root filesystem's directory layout.
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# FHS wants boot media opt srv usr/{local,share}, stuff under /var...
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mkdir -p "$ROOT"/{dev,etc/rc,home,mnt,proc,root,sys,tmp/run,usr/{bin,sbin,lib},var} &&
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chmod a+rwxt "$ROOT"/tmp && ln -s usr/{bin,sbin,lib} tmp/run "$ROOT" || exit 1
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# Write init script. Runs as pid 1 from initramfs to set up and hand off system.
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cat > "$ROOT"/init << 'EOF' &&
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#!/bin/sh
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export HOME=/home PATH=/bin:/sbin
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if ! mountpoint -q dev; then
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mount -t devtmpfs dev dev
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[ $$ -eq 1 ] && ! 2>/dev/null <0 && exec 0<>/dev/console 1>&0 2>&1
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for i in ,fd /0,stdin /1,stdout /2,stderr
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do ln -sf /proc/self/fd${i/,*/} dev/${i/*,/}; done
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mkdir -p dev/shm
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chmod +t /dev/shm
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fi
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mountpoint -q dev/pts || { mkdir -p dev/pts && mount -t devpts dev/pts dev/pts;}
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mountpoint -q proc || mount -t proc proc proc
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mountpoint -q sys || mount -t sysfs sys sys
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echo 0 99999 > /proc/sys/net/ipv4/ping_group_range
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if [ $$ -eq 1 ]; then
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mountpoint -q mnt || [ -e /dev/?da ] && mount /dev/?da /mnt
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# Setup networking for QEMU (needs /proc)
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ifconfig lo 127.0.0.1
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ifconfig eth0 10.0.2.15
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route add default gw 10.0.2.2
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[ "$(date +%s)" -lt 1000 ] && timeout 2 sntp -sq 10.0.2.2 # Ask host
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[ "$(date +%s)" -lt 10000000 ] && sntp -sq time.google.com
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# Run package scripts (if any)
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for i in $(ls -1 /etc/rc 2>/dev/null | sort); do . /etc/rc/"$i"; done
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echo 3 > /proc/sys/kernel/printk
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[ -z "$HANDOFF" ] && [ -e /mnt/init ] && HANDOFF=/mnt/init
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[ -z "$HANDOFF" ] && HANDOFF=/bin/sh && echo -e '\e[?7hType exit when done.'
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setsid -c <>/dev/$(sed '$s@.*/@@' /sys/class/tty/console/active) >&0 2>&1 \
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$HANDOFF
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reboot -f &
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sleep 5
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else # for chroot
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/bin/sh
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umount /dev/pts /dev /sys /proc
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fi
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EOF
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chmod +x "$ROOT"/init &&
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# Google's nameserver, passwd+group with special (root/nobody) accounts + guest
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echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf &&
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cat > "$ROOT"/etc/passwd << 'EOF' &&
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root:x:0:0:root:/root:/bin/sh
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guest:x:500:500:guest:/home/guest:/bin/sh
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nobody:x:65534:65534:nobody:/proc/self:/dev/null
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EOF
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echo -e 'root:x:0:\nguest:x:500:\nnobody:x:65534:' > "$ROOT"/etc/group || exit 1
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# Build any packages listed on command line
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for i in ${PKG:+plumbing $PKG}; do
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pushd .
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announce "$i"; PATH="$PKGDIR:$PATH" source $i || die $i
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popd
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done
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# Build static toybox with existing .config if there is one, else defconfig+sh
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if [ -z "$NOTOYBOX" ]; then
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announce toybox
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[ -n "$PENDING" ] && rm -f .config
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grep -q CONFIG_SH=y .config 2>/dev/null && CONF=silentoldconfig || unset CONF
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for i in $PENDING sh route; do XX="$XX"$'\n'CONFIG_${i^^?}=y; done
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[ -e "$ROOT"/lib/libc.so ] || export LDFLAGS=--static
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PREFIX="$ROOT" make clean \
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${CONF:-defconfig KCONFIG_ALLCONFIG=<(echo "$XX")} toybox install || exit 1
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unset LDFLAGS
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fi
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# ------------------ Part 3: Build + package bootable system ------------------
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# Convert comma separated values in $1 to CONFIG=$2 lines
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csv2cfg() { sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1\n/g' <<< "$1" | sed '/^$/!{/=/!s/.*/&='"$2/}";}
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# Set variables from $CROSS, die on unrecognized target:
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# BUILTIN - if set, statically link initramfs into kernel image
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# DTB - device tree binary file in build dir (qemu -dtb $DTB)
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# KARCH - linux ARCH= build argument (selects arch/$ARCH directory in source)
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# KARGS - linux kernel command line arguments (qemu -append "console=$KARGS")
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# KCONF - kernel config options for target (expanded by csv2cfg above)
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# VMLINUX - linux bootable kernel file in build dir (qemu -kernel $VMLINUX)
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# QEMU - emulator name (qemu-system-$QEMU) and arguments
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get_target_config()
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{
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# Target-specific info in an (alphabetical order) if/else staircase
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# Each target needs board config, serial console, RTC, ethernet, block device.
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if [ "$CROSS" == armv5l ]; then
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# This could use the same VIRT board as armv7, but let's demonstrate a
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# different one requiring a separate device tree binary.
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QEMU="arm -M versatilepb -net nic,model=rtl8139 -net user"
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KARCH=arm KARGS=ttyAMA0 VMLINUX=arch/arm/boot/zImage
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KCONF=CPU_ARM926T,MMU,VFP,ARM_THUMB,AEABI,ARCH_VERSATILE,ATAGS,DEPRECATED_PARAM_STRUCT,ARM_ATAG_DTB_COMPAT,ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND,SERIAL_AMBA_PL011,SERIAL_AMBA_PL011_CONSOLE,RTC_CLASS,RTC_DRV_PL031,RTC_HCTOSYS,PCI,PCI_VERSATILE,BLK_DEV_SD,SCSI,SCSI_LOWLEVEL,SCSI_SYM53C8XX_2,SCSI_SYM53C8XX_MMIO,NET_VENDOR_REALTEK,8139CP,SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=0
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DTB=versatile-pb.dtb
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elif [ "$CROSS" == armv7l ] || [ "$CROSS" == aarch64 ]; then
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if [ "$CROSS" == aarch64 ]; then
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QEMU="aarch64 -M virt -cpu cortex-a57"
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KARCH=arm64 VMLINUX=arch/arm64/boot/Image
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else
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QEMU="arm -M virt" KARCH=arm VMLINUX=arch/arm/boot/zImage
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fi
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KARGS=ttyAMA0
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KCONF=MMU,ARCH_MULTI_V7,ARCH_VIRT,SOC_DRA7XX,ARCH_OMAP2PLUS_TYPICAL,ARCH_ALPINE,ARM_THUMB,VDSO,CPU_IDLE,ARM_CPUIDLE,KERNEL_MODE_NEON,SERIAL_AMBA_PL011,SERIAL_AMBA_PL011_CONSOLE,RTC_CLASS,RTC_HCTOSYS,RTC_DRV_PL031,VIRTIO_MENU,VIRTIO_NET,PCI,PCI_HOST_GENERIC,VIRTIO_BLK,VIRTIO_PCI,VIRTIO_MMIO,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,PATA_PLATFORM,PATA_OF_PLATFORM,ATA_GENERIC,ARM_LPAE
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elif [ "$CROSS" == hexagon ]; then
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QEMU="hexagon -M comet" KARGS=ttyS0 VMLINUX=vmlinux
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KARCH="hexagon LLVM_IAS=1" KCONF=SPI,SPI_BITBANG,IOMMU_SUPPORT
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elif [ "$CROSS" == i486 ] || [ "$CROSS" == i686 ] ||
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[ "$CROSS" == x86_64 ] || [ "$CROSS" == x32 ]; then
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if [ "$CROSS" == i486 ]; then
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QEMU="i386 -cpu 486 -global fw_cfg.dma_enabled=false" KCONF=M486
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elif [ "$CROSS" == i686 ]; then
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QEMU="i386 -cpu pentium3" KCONF=MPENTIUMII
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else
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QEMU=x86_64 KCONF=64BIT
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[ "$CROSS" == x32 ] && KCONF=X86_X32
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fi
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KARCH=x86 KARGS=ttyS0 VMLINUX=arch/x86/boot/bzImage
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KCONF=$KCONF,UNWINDER_FRAME_POINTER,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,NET_VENDOR_INTEL,E1000,SERIAL_8250,SERIAL_8250_CONSOLE,RTC_CLASS
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elif [ "$CROSS" == m68k ]; then
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QEMU="m68k -M q800" KARCH=m68k KARGS=ttyS0 VMLINUX=vmlinux
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KCONF=MMU,M68040,M68KFPU_EMU,MAC,SCSI,SCSI_LOWLEVEL,BLK_DEV_SD,SCSI_MAC_ESP,MACINTOSH_DRIVERS,NET_VENDOR_NATSEMI,MACSONIC,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE
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elif [ "$CROSS" == mips ] || [ "$CROSS" == mipsel ]; then
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QEMU="mips -M malta" KARCH=mips KARGS=ttyS0 VMLINUX=vmlinux
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KCONF=MIPS_MALTA,CPU_MIPS32_R2,SERIAL_8250,SERIAL_8250_CONSOLE,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,NET_VENDOR_AMD,PCNET32,POWER_RESET,POWER_RESET_SYSCON
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[ "$CROSS" == mipsel ] && KCONF=$KCONF,CPU_LITTLE_ENDIAN &&
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QEMU="mipsel -M malta"
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elif [ "$CROSS" == or1k ]; then
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KARCH=openrisc QEMU="or1k -M or1k-sim" KARGS=FIXME VMLINUX=vmlinux BUILTIN=1
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KCONF=OPENRISC_BUILTIN_DTB=\"or1ksim\",ETHOC,SERIO,SERIAL_8250,SERIAL_8250_CONSOLE,SERIAL_OF_PLATFORM
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elif [ "$CROSS" == powerpc ]; then
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KARCH=powerpc QEMU="ppc -M g3beige" KARGS=ttyS0 VMLINUX=vmlinux
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KCONF=ALTIVEC,PPC_PMAC,PPC_OF_BOOT_TRAMPOLINE,ATA,ATA_SFF,ATA_BMDMA,PATA_MACIO,BLK_DEV_SD,MACINTOSH_DRIVERS,ADB,ADB_CUDA,NET_VENDOR_NATSEMI,NET_VENDOR_8390,NE2K_PCI,SERIO,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE,BOOTX_TEXT
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elif [ "$CROSS" == powerpc64 ] || [ "$CROSS" == powerpc64le ]; then
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KARCH=powerpc QEMU="ppc64 -M pseries -vga none" KARGS=hvc0
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VMLINUX=vmlinux
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KCONF=PPC64,PPC_PSERIES,PPC_OF_BOOT_TRAMPOLINE,BLK_DEV_SD,SCSI_LOWLEVEL,SCSI_IBMVSCSI,ATA,NET_VENDOR_IBM,IBMVETH,HVC_CONSOLE,PPC_TRANSACTIONAL_MEM,PPC_DISABLE_WERROR,SECTION_MISMATCH_WARN_ONLY
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[ "$CROSS" == powerpc64le ] && KCONF=$KCONF,CPU_LITTLE_ENDIAN
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elif [ "$CROSS" = s390x ]; then
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QEMU="s390x" KARCH=s390 VMLINUX=arch/s390/boot/bzImage
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KCONF=MARCH_Z900,PACK_STACK,VIRTIO_NET,VIRTIO_BLK,SCLP_TTY,SCLP_CONSOLE,SCLP_VT220_TTY,SCLP_VT220_CONSOLE,S390_GUEST
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elif [ "$CROSS" == sh2eb ]; then
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BUILTIN=1 KARCH=sh VMLINUX=vmlinux
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KCONF=CPU_SUBTYPE_J2,CPU_BIG_ENDIAN,SH_JCORE_SOC,SMP,BINFMT_ELF_FDPIC,JCORE_EMAC,SERIAL_UARTLITE,SERIAL_UARTLITE_CONSOLE,HZ_100,CMDLINE_OVERWRITE,SPI,SPI_JCORE,MMC,PWRSEQ_SIMPLE,MMC_BLOCK,MMC_SPI,BINMT_FLAT,BINFMT_MISC,DNOTIFY,INOTIFY_USER,FUSE_FS,I2C,I2C_HELPER_AUTO,LOCALVERSION_AUTO,MTD,MTD_SPI_NOR,MTD_SST25L,MTD_OF_PARTS,POSIX_MQUEUE,SYSVIPC,UEVENT_HELPER,UIO,UIO_PDRV_GENIRQ,FLATMEM_MANUAL,MEMORY_START=0x10000000,CMDLINE=\"console=ttyUL0\ earlycon\"
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KCONF+=,BFP_SYSCALL,CRYPTO_DES,CRYPTO_DH,CRYPTO_ECHAINIV,CRYPTO_LZO,CRYPTO_MANAGER_DISABLE_TESTS,CRYPTO_RSA,CRYPTO_SHA1,CRYPTO_SHA3,INET_DIAG,SERIAL_8250
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# TODO NET_9P,9P_FS fails to boot in 6.3, unaligned access?
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elif [ "$CROSS" == sh4 ]; then
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QEMU="sh4 -M r2d -serial null -serial mon:stdio" KARCH=sh
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KARGS="ttySC1 noiotrap" VMLINUX=arch/sh/boot/zImage
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KCONF=CPU_SUBTYPE_SH7751R,MMU,VSYSCALL,SH_FPU,SH_RTS7751R2D,RTS7751R2D_PLUS,SERIAL_SH_SCI,SERIAL_SH_SCI_CONSOLE,PCI,NET_VENDOR_REALTEK,8139CP,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,PATA_PLATFORM,BINFMT_ELF_FDPIC,BINFMT_FLAT,MEMORY_START=0x0c000000
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#see also SPI SPI_SH_SCI MFD_SM501 RTC_CLASS RTC_DRV_R9701 RTC_DRV_SH RTC_HCTOSYS
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else die "Unknown \$CROSS=$CROSS"
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fi
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}
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# ----- Build kernel for target
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if [ -z "$LINUX" ] || [ ! -d "$LINUX/kernel" ]; then
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echo 'No $LINUX directory, kernel build skipped.'
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else
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# Which architecture are we building a kernel for?
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LINUX="$(realpath "$LINUX")"
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[ "$CROSS" == host ] && CROSS="$(uname -m)"
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get_target_config
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# Write the qemu launch script
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if [ -n "$QEMU" ]; then
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[ -z "$BUILTIN" ] && INITRD='-initrd "$DIR"/initramfs.cpio.gz'
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{ echo DIR='"$(dirname $0)";' qemu-system-"$QEMU" -m 256 '"$@"' $QEMU_MORE \
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-nographic -no-reboot -kernel '"$DIR"'/linux-kernel $INITRD \
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${DTB:+-dtb '"$DIR"'/linux.dtb} \
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"-append \"HOST=$CROSS console=$KARGS \$KARGS\"" &&
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echo "echo -e '\\e[?7h'"
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} > "$OUTPUT"/run-qemu.sh &&
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chmod +x "$OUTPUT"/run-qemu.sh || exit 1
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fi
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announce "linux-$KARCH"
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pushd "$LINUX" && make distclean && popd &&
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cp -sfR "$LINUX" "$TEMP/linux" && pushd "$TEMP/linux" &&
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# Write linux-miniconfig
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mkdir -p "$OUTDOC" &&
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{ echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=linux-miniconfig"
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echo -e "# make ARCH=$KARCH -j \$(nproc)\n# boot $VMLINUX\n\n"
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# Expand list of =y symbols, first generic then architecture-specific
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for i in BINFMT_ELF,BINFMT_SCRIPT,PANIC_TIMEOUT=1,NO_HZ,HIGH_RES_TIMERS,BLK_DEV,BLK_DEV_INITRD,RD_GZIP,BLK_DEV_LOOP,EXT4_FS,EXT4_USE_FOR_EXT2,VFAT_FS,FAT_DEFAULT_UTF8,NLS_CODEPAGE_437,NLS_ISO8859_1,MISC_FILESYSTEMS,SQUASHFS,SQUASHFS_XATTR,SQUASHFS_ZLIB,DEVTMPFS,DEVTMPFS_MOUNT,TMPFS,TMPFS_POSIX_ACL,NET,PACKET,UNIX,INET,IPV6,NETDEVICES,NET_CORE,NETCONSOLE,ETHERNET,COMPAT_32BIT_TIME,EARLY_PRINTK,IKCONFIG,IKCONFIG_PROC "$KCONF" ${MODULES+MODULES,MODULE_UNLOAD} "$KEXTRA" ; do
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echo "$i" >> "$OUTDOC"/linux-microconfig
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echo "# architecture ${X:-independent}"
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csv2cfg "$i" y
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X=${X:+extra} X=${X:-specific}
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done
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[ -n "$BUILTIN" ] && echo -e CONFIG_INITRAMFS_SOURCE="\"$OUTPUT/fs\""
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for i in $MODULES; do csv2cfg "$i" m; done
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echo "$KERNEL_CONFIG"
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} > "$OUTDOC/linux-miniconfig" &&
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make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTDOC/linux-miniconfig" &&
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# Second config pass to remove stupid kernel defaults
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# See http://lkml.iu.edu/hypermail/linux/kernel/1912.3/03493.html
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sed -e 's/# CONFIG_EXPERT .*/CONFIG_EXPERT=y/' -e "$(sed -E -e '/^$/d' \
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-e 's@([^,]*)($|,)@/^CONFIG_\1=y/d;$a# CONFIG_\1 is not set\n@g' \
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<<< VT,SCHED_DEBUG,DEBUG_MISC,X86_DEBUG_FPU)" -i .config &&
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yes "" | make ARCH=$KARCH oldconfig > /dev/null &&
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|
cp .config "$OUTDOC/linux-fullconfig" &&
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|
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|
# Build kernel. Copy config, device tree binary, and kernel binary to output
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|
make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) all || exit 1
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[ -n "$DTB" ] && { cp "$(find -name $DTB)" "$OUTPUT/linux.dtb" || exit 1 ;}
|
|
if [ -n "$MODULES" ]; then
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|
make ARCH=$KARCH INSTALL_MOD_PATH=modz modules_install &&
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|
(cd modz && find lib/modules | cpio -o -H newc -R +0:+0 ) | gzip \
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|
> "$OUTDOC/modules.cpio.gz" || exit 1
|
|
fi
|
|
cp "$VMLINUX" "$OUTPUT"/linux-kernel && cd .. && rm -rf linux && popd ||exit 1
|
|
fi
|
|
|
|
# clean up and package root filesystem for initramfs.
|
|
if [ -z "$BUILTIN" ]; then
|
|
announce initramfs
|
|
{ (cd "$ROOT" && find . -printf '%P\n' | cpio -o -H newc -R +0:+0 ) || exit 1
|
|
! test -e "$OUTDOC/modules.cpio.gz" || zcat $_;} | gzip \
|
|
> "$OUTPUT"/initramfs.cpio.gz || exit 1
|
|
fi
|
|
|
|
mv "$LOG".{n,y} && echo "Output is in $OUTPUT"
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|
rmdir "$TEMP" 2>/dev/null || exit 0 # remove if empty, not an error
|