252 lines
12 KiB
Bash
Executable File
252 lines
12 KiB
Bash
Executable File
#!/bin/bash
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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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# assign command line NAME=VALUE args to env vars, keeping rest as packages
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while [ $# -ne 0 ]; do
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[ "${1/=/}" != "$1" ] && eval "export ${1/=*/}=\"\${1#*=}\"" ||
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{ [ "$1" != '--' ] && PKG="${PKG:-plumbing} $1"; }
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shift
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done
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die() { echo "$@" >&2; exit 1; }
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announce() { echo -e "\033]2;$CROSS $*\007\n=== $*"; }
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# Create target-independent working directories (cmdline can change locations)
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TOP="$PWD/root"
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mkdir -p ${BUILD:=$TOP/build} ${AIRLOCK:=$TOP/airlock} ${LOG:=$TOP/log} ||exit 1
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# set CROSS_COMPILE from $CROSS using ccc. Handle "all" w/log, list, and err chk
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if [ ! -z "$CROSS" ]; then
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[ ! -d "${CCC:=$PWD/ccc}" ] && die "No ccc symlink to compiler directory."
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CROSS_COMPILE="$(echo "$CCC/$CROSS"-*cross/bin/"$CROSS"*-cc | sed 's/cc$//')"
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if [ "${CROSS::3}" == all ]; then
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for i in $(ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs); do
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{ rm -f "$LOG/$i-log".{failed,success}
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"$0" "$@" CROSS=$i ; [ $? -eq 0 ] && mv "$LOG/$i".{txt,success}
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} |& tee "$LOG/$i.txt"
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[ ! -e "$LOG/$i.success" ] &&
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{ mv "$LOG/$i".{txt,failed};[ "$CROSS" != allnonstop ] && exit 1; }
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done
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exit
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elif [ ! -e "${CROSS_COMPILE}cc" ]; then
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ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs
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exit
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fi
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fi
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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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# Parse and sanity check $CROSS_COMPILE (if any)
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if [ ! -z "$CROSS_COMPILE" ]; then
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CROSS_PATH="$(dirname "$(which "${CROSS_COMPILE}cc")")"
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[ -z "$CROSS_PATH" ] && die "no ${CROSS_COMPILE}cc in path"
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: ${CROSS_BASE:=$(basename "$CROSS_COMPILE")} ${CROSS:=${CROSS_BASE/-*/}}
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fi
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echo "Building for ${CROSS:=host}"
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# Create target-specific work/output directories
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: ${OUTPUT:=$TOP/$CROSS} ${PKGDIR:=$PWD/scripts/root}
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MYBUILD="$BUILD/${CROSS_BASE:-host-}tmp"
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rm -rf "$MYBUILD" && mkdir -p "$MYBUILD" || exit 1
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[ -z "$ROOT" ] && ROOT="$OUTPUT/fs" && rm -rf "$ROOT" # only blank if NOT set
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# When cross compiling build everything under a host toybox with known behavior
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if [ ! -z "$CROSS_COMPILE" ]; then
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if [ ! -e "$AIRLOCK/toybox" ]; then
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announce "airlock"
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PREFIX="$AIRLOCK" KCONFIG_CONFIG="$TOP"/.airlock CROSS_COMPILE= \
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make clean defconfig toybox install_airlock && rm "$TOP"/.airlock ||exit 1
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fi
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export PATH="$CROSS_PATH:$AIRLOCK"
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fi
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# Create new root filesystem's directory layout
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mkdir -p "$ROOT"/{etc,tmp,proc,sys,dev,home,mnt,root,usr/{bin,sbin,lib},var} &&
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chmod a+rwxt "$ROOT"/tmp && ln -s usr/{bin,sbin,lib} "$ROOT" || exit 1
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# Write init script. Runs as pid 1 from initramfs to set up and hand off system.
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cat > "$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 || mdev -s
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[ $$ -eq 1 ] && exec >/dev/console 2>&1
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for i in ,fd /0,stdin /1,stdout /2,stderr
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do ln -sf /proc/self/fd${i/,*/} dev/${i/*,/}; done
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mkdir -p dev/{shm,pts}
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mountpoint -q dev/pts || mount -t devpts dev/pts dev/pts
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chmod +t /dev/shm
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fi
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mountpoint -q proc || mount -t proc proc proc
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mountpoint -q sys || mount -t sysfs sys sys
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if [ $$ -eq 1 ]; then # 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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[ -e /etc/rc ] && for i in $(echo /etc/rc/* | sort); do . $i; done
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[ -z "$CONSOLE" ] && CONSOLE="$(</sys/class/tty/console/active)"
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[ -z "$HANDOFF" ] && HANDOFF=/bin/sh && echo Type exit when done.
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echo 3 > /proc/sys/kernel/printk
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exec oneit -c /dev/"${CONSOLE:-console}" $HANDOFF
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else # for chroot
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/bin/sh
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umount /dev/pts /dev /sys /proc
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fi
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EOF
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chmod +x "$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:' > "$ROOT"/etc/group || exit 1
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# Build static toybox with existing .config if there is one, else defconfig+sh
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announce toybox
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[ -e .config ] && [ -z "$PENDING" ] && 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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make clean ${CONF:-defconfig KCONFIG_ALLCONFIG=<(echo "$XX")} &&
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LDFLAGS=--static PREFIX="$ROOT" make toybox install || exit 1
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# Build any packages listed on command line
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for i in $PKG; do
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announce "$i"; PATH="$PKGDIR:$PATH" source $i; [ $? -ne 0 ] && die $i
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done
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if [ -z "$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 "$LINUX")"
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[ -z "$TARGET" ] && TARGET="${CROSS_BASE/-*/}"
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[ -z "$TARGET" ] && TARGET="$(uname -m)"
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# Target-specific info in an (alphabetical order) if/else staircase
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# Each target needs board config, serial console, RTC, ethernet, block device.
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if [ "$TARGET" == 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
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KERNEL_CONFIG="CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=0"
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DTB=arch/arm/boot/dts/versatile-pb.dtb
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elif [ "$TARGET" == armv7l ] || [ "$TARGET" == aarch64 ]; then
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if [ "$TARGET" == aarch64 ]; then
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QEMU="aarch64 -M virt -cpu cortex-a57"
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KARCH=arm64 VMLINUX=arch/arm64/boot/Image
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else
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QEMU="arm -M virt" KARCH=arm VMLINUX=arch/arm/boot/zImage
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fi
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KARGS=ttyAMA0
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KCONF=MMU,ARCH_MULTI_V7,ARCH_VIRT,SOC_DRA7XX,ARCH_OMAP2PLUS_TYPICAL,ARCH_ALPINE,ARM_THUMB,VDSO,CPU_IDLE,ARM_CPUIDLE,KERNEL_MODE_NEON,SERIAL_AMBA_PL011,SERIAL_AMBA_PL011_CONSOLE,RTC_CLASS,RTC_HCTOSYS,RTC_DRV_PL031,NET_CORE,VIRTIO_MENU,VIRTIO_NET,PCI,PCI_HOST_GENERIC,VIRTIO_BLK,VIRTIO_PCI,VIRTIO_MMIO,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,PATA_PLATFORM,PATA_OF_PLATFORM,ATA_GENERIC
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elif [ "$TARGET" == i486 ] || [ "$TARGET" == i686 ] ||
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[ "$TARGET" == x86_64 ] || [ "$TARGET" == x32 ]; then
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if [ "$TARGET" == i486 ]; then
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QEMU="i386 -cpu 486 -global fw_cfg.dma_enabled=false" KCONF=M486
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elif [ "$TARGET" == i686 ]; then
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QEMU="i386 -cpu pentium3" KCONF=MPENTIUMII
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else
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QEMU=x86_64 KCONF=64BIT
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[ "$TARGET" == 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=$KCONF,UNWINDER_FRAME_POINTER,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,NET_VENDOR_INTEL,E1000,SERIAL_8250,SERIAL_8250_CONSOLE,RTC_CLASS
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elif [ "$TARGET" == 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_MAC_ESP,MACINTOSH_DRIVERS,ADB,ADB_MACII,NET_CORE,MACSONIC,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE
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elif [ "$TARGET" == mips ] || [ "$TARGET" == 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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[ "$TARGET" == mipsel ] && KCONF=$KCONF,CPU_LITTLE_ENDIAN &&
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QEMU="mipsel -M malta"
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elif [ "$TARGET" == powerpc ]; then
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KARCH=powerpc QEMU="ppc -M g3beige" KARGS=ttyS0 VMLINUX=vmlinux
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KCONF=ALTIVEC,PPC_PMAC,PPC_OF_BOOT_TRAMPOLINE,IDE,IDE_GD,IDE_GD_ATA,BLK_DEV_IDE_PMAC,BLK_DEV_IDE_PMAC_ATA100FIRST,MACINTOSH_DRIVERS,ADB,ADB_CUDA,NET_VENDOR_NATSEMI,NET_VENDOR_8390,NE2K_PCI,SERIO,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE,BOOTX_TEXT
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elif [ "$TARGET" == powerpc64le ]; then
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KARCH=powerpc QEMU="ppc64 -M pseries -vga none" KARGS=/dev/hvc0
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VMLINUX=vmlinux
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KCONF=PPC64,PPC_PSERIES,CPU_LITTLE_ENDIAN,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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elif [ "$TARGET" = s390x ]; then
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QEMU="s390x" KARCH=s390 VMLINUX=arch/s390/boot/bzImage
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KCONF=MARCH_Z900,PACK_STACK,NET_CORE,VIRTIO_NET,VIRTIO_BLK,SCLP_TTY,SCLP_CONSOLE,SCLP_VT220_TTY,SCLP_VT220_CONSOLE,S390_GUEST
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elif [ "$TARGET" == sh2eb ]; then
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KARCH=sh VMLINUX=vmlinux KERNEL_CONFIG='CONFIG_MEMORY_START=0x10000000
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CONFIG_CMDLINE="console=ttyUL0 earlycon"' BUILTIN=1
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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
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elif [ "$TARGET" == 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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KERNEL_CONFIG="CONFIG_MEMORY_START=0x0c000000"
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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
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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 \$TARGET $TARGET"
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fi
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# Write the qemu launch script
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if [ ! -z "$QEMU" ]; then
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[ -z "$BUILTIN" ] && INITRD="-initrd ${CROSS_BASE}root.cpio.gz"
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echo qemu-system-"$QEMU" '"$@"' $QEMU_MORE -nographic -no-reboot -m 256 \
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-kernel $(basename $VMLINUX) $INITRD \
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"-append \"panic=1 HOST=$TARGET console=$KARGS \$KARGS\"" \
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${DTB:+-dtb "$(basename "$DTB")"} ";echo -e '\e[?7h'" \
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> "$OUTPUT/qemu-$TARGET.sh" &&
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chmod +x "$OUTPUT/qemu-$TARGET.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 "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" &&
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# Write miniconfig
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{ echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=$TARGET.miniconf"
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echo -e "# make ARCH=$KARCH -j \$(nproc)\n# boot $VMLINUX\n\n"
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echo "# CONFIG_EMBEDDED is not set"
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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,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,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 ; do
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echo "# architecture ${X:-independent}"
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sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$i"
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X=specific
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done
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[ ! -z "$BUILTIN" ] && echo -e CONFIG_INITRAMFS_SOURCE="\"$OUTPUT/fs\""
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echo "$KERNEL_CONFIG"
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} > "$OUTPUT/miniconfig-$TARGET" &&
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make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" &&
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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=$KARCH oldconfig > /dev/null &&
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# Build kernel. Copy config, device tree binary, and kernel binary to output
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make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) &&
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cp .config "$OUTPUT/linux-fullconfig" || exit 1
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[ ! -z "$DTB" ] && { cp "$DTB" "$OUTPUT" || exit 1 ;}
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cp "$VMLINUX" "$OUTPUT" && cd .. && rm -rf linux && popd || exit 1
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fi
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# clean up and package root filesystem for initramfs.
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[ -z "$BUILTIN" ] && announce "${CROSS_BASE}root.cpio.gz" &&
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(cd "$ROOT" && find . | cpio -o -H newc ${CROSS_COMPILE:+--no-preserve-owner} | gzip) \
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> "$OUTPUT/$CROSS_BASE"root.cpio.gz
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rmdir "$MYBUILD" "$BUILD" 2>/dev/null # remove if empty
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