| #!/bin/bash |
| |
| # Clear environment variables by restarting script w/bare minimum passed through |
| [ -z "$NOCLEAR" ] && exec env -i NOCLEAR=1 HOME="$HOME" PATH="$PATH" \ |
| "LINUX=$LINUX" "CROSS=$CROSS" CROSS_COMPILE="$CROSS_COMPILE" "$0" "$@" |
| |
| # assign command line NAME=VALUE args to env vars, keeping rest as packages |
| while [ $# -ne 0 ]; do |
| [ "${1/=/}" != "$1" ] && eval "export ${1/=*/}=\"\${1#*=}\"" || |
| { [ "$1" != '--' ] && PKG="${PKG:-plumbing} $1"; } |
| shift |
| done |
| |
| die() { echo "$@" >&2; exit 1; } |
| announce() { echo -e "\033]2;$CROSS $*\007\n=== $*"; } |
| |
| # Create target-independent working directories (cmdline can change locations) |
| TOP="$PWD/root" |
| mkdir -p ${BUILD:=$TOP/build} ${AIRLOCK:=$TOP/airlock} ${LOG:=$TOP/log} ||exit 1 |
| |
| # set CROSS_COMPILE from $CROSS using ccc. Handle "all" w/log, list, and err chk |
| if [ ! -z "$CROSS" ]; then |
| [ ! -d "${CCC:=$PWD/ccc}" ] && die "No ccc symlink to compiler directory." |
| CROSS_COMPILE="$(echo "$CCC/$CROSS"-*cross/bin/"$CROSS"*-cc | sed 's/cc$//')" |
| if [ "${CROSS::3}" == all ]; then |
| for i in $(ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs); do |
| { rm -f "$LOG/$i-log".{failed,success} |
| "$0" "$@" CROSS=$i ; [ $? -eq 0 ] && mv "$LOG/$i".{txt,success} |
| } |& tee "$LOG/$i.txt" |
| [ ! -e "$LOG/$i.success" ] && |
| { mv "$LOG/$i".{txt,failed};[ "$CROSS" != allnonstop ] && exit 1; } |
| done |
| exit |
| elif [ ! -e "${CROSS_COMPILE}cc" ]; then |
| ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs |
| exit |
| fi |
| fi |
| |
| ${CROSS_COMPILE}cc --static -xc - -o /dev/null <<< "int main(void){return 0;}"|| |
| die "${CROSS_COMPILE}cc can't create static binaries" |
| |
| # Parse and sanity check $CROSS_COMPILE (if any) |
| if [ ! -z "$CROSS_COMPILE" ]; then |
| CROSS_PATH="$(dirname "$(which "${CROSS_COMPILE}cc")")" |
| [ -z "$CROSS_PATH" ] && die "no ${CROSS_COMPILE}cc in path" |
| : ${CROSS_BASE:=$(basename "$CROSS_COMPILE")} ${CROSS:=${CROSS_BASE/-*/}} |
| fi |
| echo "Building for ${CROSS:=host}" |
| |
| # Create target-specific work/output directories |
| : ${OUTPUT:=$TOP/$CROSS} ${PKGDIR:=$PWD/scripts/root} |
| MYBUILD="$BUILD/${CROSS_BASE:-host-}tmp" |
| rm -rf "$MYBUILD" && mkdir -p "$MYBUILD" || exit 1 |
| [ -z "$ROOT" ] && ROOT="$OUTPUT/fs" && rm -rf "$ROOT" # only blank if NOT set |
| |
| # When cross compiling build everything under a host toybox with known behavior |
| if [ ! -z "$CROSS_COMPILE" ]; then |
| if [ ! -e "$AIRLOCK/toybox" ]; then |
| announce "airlock" |
| PREFIX="$AIRLOCK" KCONFIG_CONFIG="$TOP"/.airlock CROSS_COMPILE= \ |
| make clean defconfig toybox install_airlock && rm "$TOP"/.airlock ||exit 1 |
| fi |
| export PATH="$CROSS_PATH:$AIRLOCK" |
| fi |
| |
| # Create new root filesystem's directory layout |
| mkdir -p "$ROOT"/{etc,tmp,proc,sys,dev,home,mnt,root,usr/{bin,sbin,lib},var} && |
| chmod a+rwxt "$ROOT"/tmp && ln -s usr/{bin,sbin,lib} "$ROOT" || exit 1 |
| |
| # Write init script. Runs as pid 1 from initramfs to set up and hand off system. |
| cat > "$ROOT"/init << 'EOF' && |
| #!/bin/sh |
| |
| export HOME=/home PATH=/bin:/sbin |
| |
| if ! mountpoint -q dev; then |
| mount -t devtmpfs dev dev || mdev -s |
| [ $$ -eq 1 ] && exec >/dev/console 2>&1 |
| for i in ,fd /0,stdin /1,stdout /2,stderr |
| do ln -sf /proc/self/fd${i/,*/} dev/${i/*,/}; done |
| mkdir -p dev/{shm,pts} |
| mountpoint -q dev/pts || mount -t devpts dev/pts dev/pts |
| chmod +t /dev/shm |
| fi |
| mountpoint -q proc || mount -t proc proc proc |
| mountpoint -q sys || mount -t sysfs sys sys |
| |
| if [ $$ -eq 1 ]; then # Setup networking for QEMU (needs /proc) |
| ifconfig lo 127.0.0.1 |
| ifconfig eth0 10.0.2.15 |
| route add default gw 10.0.2.2 |
| [ "$(date +%s)" -lt 1000 ] && timeout 2 sntp -sq 10.0.2.2 # Ask host |
| [ "$(date +%s)" -lt 10000000 ] && sntp -sq time.google.com |
| |
| # Run package scripts (if any) |
| [ -e /etc/rc ] && for i in $(echo /etc/rc/* | sort); do . $i; done |
| |
| [ -z "$CONSOLE" ] && CONSOLE="$(</sys/class/tty/console/active)" |
| [ -z "$HANDOFF" ] && HANDOFF=/bin/sh && echo Type exit when done. |
| echo 3 > /proc/sys/kernel/printk |
| exec oneit -c /dev/"${CONSOLE:-console}" $HANDOFF |
| else # for chroot |
| /bin/sh |
| umount /dev/pts /dev /sys /proc |
| fi |
| EOF |
| chmod +x "$ROOT"/init && |
| |
| # Google's nameserver, passwd+group with special (root/nobody) accounts + guest |
| echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf && |
| cat > "$ROOT"/etc/passwd << 'EOF' && |
| root:x:0:0:root:/root:/bin/sh |
| guest:x:500:500:guest:/home/guest:/bin/sh |
| nobody:x:65534:65534:nobody:/proc/self:/dev/null |
| EOF |
| echo -e 'root:x:0:\nguest:x:500:\nnobody:x:65534:' > "$ROOT"/etc/group || exit 1 |
| |
| # Build static toybox with existing .config if there is one, else defconfig+sh |
| announce toybox |
| [ -e .config ] && [ -z "$PENDING" ] && CONF=silentoldconfig || unset CONF |
| for i in $PENDING sh route; do XX="$XX"$'\n'CONFIG_${i^^?}=y; done |
| make clean ${CONF:-defconfig KCONFIG_ALLCONFIG=<(echo "$XX")} && |
| LDFLAGS=--static PREFIX="$ROOT" make toybox install || exit 1 |
| |
| # Build any packages listed on command line |
| for i in $PKG; do |
| announce "$i"; PATH="$PKGDIR:$PATH" source $i; [ $? -ne 0 ] && die $i |
| done |
| |
| if [ -z "$LINUX" ] || [ ! -d "$LINUX/kernel" ]; then |
| echo 'No $LINUX directory, kernel build skipped.' |
| else |
| # Which architecture are we building a kernel for? |
| LINUX="$(realpath "$LINUX")" |
| [ -z "$TARGET" ] && TARGET="${CROSS_BASE/-*/}" |
| [ -z "$TARGET" ] && TARGET="$(uname -m)" |
| |
| # Target-specific info in an (alphabetical order) if/else staircase |
| # Each target needs board config, serial console, RTC, ethernet, block device. |
| |
| if [ "$TARGET" == armv5l ]; then |
| # This could use the same VIRT board as armv7, but let's demonstrate a |
| # different one requiring a separate device tree binary. |
| QEMU="arm -M versatilepb -net nic,model=rtl8139 -net user" |
| KARCH=arm KARGS=ttyAMA0 VMLINUX=arch/arm/boot/zImage |
| 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 |
| KERNEL_CONFIG="CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=0" |
| DTB=arch/arm/boot/dts/versatile-pb.dtb |
| elif [ "$TARGET" == armv7l ] || [ "$TARGET" == aarch64 ]; then |
| if [ "$TARGET" == aarch64 ]; then |
| QEMU="aarch64 -M virt -cpu cortex-a57" |
| KARCH=arm64 VMLINUX=arch/arm64/boot/Image |
| else |
| QEMU="arm -M virt" KARCH=arm VMLINUX=arch/arm/boot/zImage |
| fi |
| KARGS=ttyAMA0 |
| KCONF=MMU,ARCH_MULTI_V7,ARCH_VIRT,SOC_DRA7XX,ARCH_OMAP2PLUS_TYPICAL,ARCH_ALPINE,ARM_THUMB,VDSO,CPU_IDLE,ARM_CPUIDLE,KERNEL_MODE_NEON,SERIAL_AMBA_PL011,SERIAL_AMBA_PL011_CONSOLE,RTC_CLASS,RTC_HCTOSYS,RTC_DRV_PL031,NET_CORE,VIRTIO_MENU,VIRTIO_NET,PCI,PCI_HOST_GENERIC,VIRTIO_BLK,VIRTIO_PCI,VIRTIO_MMIO,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,PATA_PLATFORM,PATA_OF_PLATFORM,ATA_GENERIC |
| elif [ "$TARGET" == hexagon ]; then |
| QEMU="hexagon -M comet" KARGS=ttyS0 VMLINUX=vmlinux |
| KARCH="hexagon LLVM_IAS=1" KCONF=SPI,SPI_BITBANG,IOMMU_SUPPORT |
| elif [ "$TARGET" == i486 ] || [ "$TARGET" == i686 ] || |
| [ "$TARGET" == x86_64 ] || [ "$TARGET" == x32 ]; then |
| if [ "$TARGET" == i486 ]; then |
| QEMU="i386 -cpu 486 -global fw_cfg.dma_enabled=false" KCONF=M486 |
| elif [ "$TARGET" == i686 ]; then |
| QEMU="i386 -cpu pentium3" KCONF=MPENTIUMII |
| else |
| QEMU=x86_64 KCONF=64BIT |
| [ "$TARGET" == x32 ] && KCONF=X86_X32 |
| fi |
| KARCH=x86 KARGS=ttyS0 VMLINUX=arch/x86/boot/bzImage |
| KCONF=$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 |
| elif [ "$TARGET" == m68k ]; then |
| QEMU="m68k -M q800" KARCH=m68k KARGS=ttyS0 VMLINUX=vmlinux |
| KCONF=MMU,M68040,M68KFPU_EMU,MAC,SCSI_MAC_ESP,MACINTOSH_DRIVERS,ADB,ADB_MACII,NET_CORE,MACSONIC,SERIAL_PMACZILOG,SERIAL_PMACZILOG_TTYS,SERIAL_PMACZILOG_CONSOLE |
| elif [ "$TARGET" == mips ] || [ "$TARGET" == mipsel ]; then |
| QEMU="mips -M malta" KARCH=mips KARGS=ttyS0 VMLINUX=vmlinux |
| KCONF=MIPS_MALTA,CPU_MIPS32_R2,SERIAL_8250,SERIAL_8250_CONSOLE,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,ATA_PIIX,NET_VENDOR_AMD,PCNET32,POWER_RESET,POWER_RESET_SYSCON |
| [ "$TARGET" == mipsel ] && KCONF=$KCONF,CPU_LITTLE_ENDIAN && |
| QEMU="mipsel -M malta" |
| elif [ "$TARGET" == powerpc ]; then |
| KARCH=powerpc QEMU="ppc -M g3beige" KARGS=ttyS0 VMLINUX=vmlinux |
| 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 |
| elif [ "$TARGET" == powerpc64le ]; then |
| KARCH=powerpc QEMU="ppc64 -M pseries -vga none" KARGS=hvc0 |
| VMLINUX=vmlinux |
| KCONF=PPC64,PPC_PSERIES,CPU_LITTLE_ENDIAN,PPC_OF_BOOT_TRAMPOLINE,BLK_DEV_SD,SCSI_LOWLEVEL,SCSI_IBMVSCSI,ATA,NET_VENDOR_IBM,IBMVETH,HVC_CONSOLE,PPC_TRANSACTIONAL_MEM,PPC_DISABLE_WERROR,SECTION_MISMATCH_WARN_ONLY |
| elif [ "$TARGET" = s390x ]; then |
| QEMU="s390x" KARCH=s390 VMLINUX=arch/s390/boot/bzImage |
| KCONF=MARCH_Z900,PACK_STACK,NET_CORE,VIRTIO_NET,VIRTIO_BLK,SCLP_TTY,SCLP_CONSOLE,SCLP_VT220_TTY,SCLP_VT220_CONSOLE,S390_GUEST |
| elif [ "$TARGET" == sh2eb ]; then |
| KARCH=sh VMLINUX=vmlinux KERNEL_CONFIG='CONFIG_MEMORY_START=0x10000000 |
| CONFIG_CMDLINE="console=ttyUL0 earlycon"' BUILTIN=1 |
| KCONF=CPU_SUBTYPE_J2,CPU_BIG_ENDIAN,SH_JCORE_SOC,SMP,BINFMT_ELF_FDPIC,JCORE_EMAC,SERIAL_UARTLITE,SERIAL_UARTLITE_CONSOLE,HZ_100,CMDLINE_OVERWRITE,SPI,SPI_JCORE,MMC,PWRSEQ_SIMPLE,MMC_BLOCK,MMC_SPI |
| elif [ "$TARGET" == sh4 ]; then |
| QEMU="sh4 -M r2d -serial null -serial mon:stdio" KARCH=sh |
| KARGS="ttySC1 noiotrap" VMLINUX=arch/sh/boot/zImage |
| KERNEL_CONFIG="CONFIG_MEMORY_START=0x0c000000" |
| 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 |
| #see also SPI SPI_SH_SCI MFD_SM501 RTC_CLASS RTC_DRV_R9701 RTC_DRV_SH RTC_HCTOSYS |
| else die "Unknown \$TARGET $TARGET" |
| fi |
| |
| # Write the qemu launch script |
| if [ ! -z "$QEMU" ]; then |
| [ -z "$BUILTIN" ] && INITRD="-initrd ${CROSS_BASE}root.cpio.gz" |
| echo qemu-system-"$QEMU" '"$@"' $QEMU_MORE -nographic -no-reboot -m 256 \ |
| -kernel $(basename $VMLINUX) $INITRD \ |
| "-append \"panic=1 HOST=$TARGET console=$KARGS \$KARGS\"" \ |
| ${DTB:+-dtb "$(basename "$DTB")"} ";echo -e '\e[?7h'" \ |
| > "$OUTPUT/qemu-$TARGET.sh" && |
| chmod +x "$OUTPUT/qemu-$TARGET.sh" || exit 1 |
| fi |
| |
| announce "linux-$KARCH" |
| pushd "$LINUX" && make distclean && popd && |
| cp -sfR "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" && |
| |
| # Write miniconfig |
| { echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=$TARGET.miniconf" |
| echo -e "# make ARCH=$KARCH -j \$(nproc)\n# boot $VMLINUX\n\n" |
| echo "# CONFIG_EMBEDDED is not set" |
| |
| # Expand list of =y symbols, first generic then architecture-specific |
| 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 |
| echo "# architecture ${X:-independent}" |
| sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$i" |
| X=specific |
| done |
| [ ! -z "$BUILTIN" ] && echo -e CONFIG_INITRAMFS_SOURCE="\"$OUTPUT/fs\"" |
| echo "$KERNEL_CONFIG" |
| } > "$OUTPUT/miniconfig-$TARGET" && |
| make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" && |
| |
| # Second config pass to remove stupid kernel defaults |
| # See http://lkml.iu.edu/hypermail/linux/kernel/1912.3/03493.html |
| sed -e 's/# CONFIG_EXPERT .*/CONFIG_EXPERT=y/' -e "$(sed -E -e '/^$/d' \ |
| -e 's@([^,]*)($|,)@/^CONFIG_\1=y/d;$a# CONFIG_\1 is not set/\n@g' \ |
| <<< VT,SCHED_DEBUG,DEBUG_MISC,X86_DEBUG_FPU)" -i .config && |
| yes "" | make ARCH=$KARCH oldconfig > /dev/null && |
| |
| # Build kernel. Copy config, device tree binary, and kernel binary to output |
| make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) && |
| cp .config "$OUTPUT/linux-fullconfig" || exit 1 |
| [ ! -z "$DTB" ] && { cp "$DTB" "$OUTPUT" || exit 1 ;} |
| cp "$VMLINUX" "$OUTPUT" && cd .. && rm -rf linux && popd || exit 1 |
| fi |
| |
| # clean up and package root filesystem for initramfs. |
| [ -z "$BUILTIN" ] && announce "${CROSS_BASE}root.cpio.gz" && |
| (cd "$ROOT" && find . | cpio -o -H newc ${CROSS_COMPILE:+--no-preserve-owner} | gzip) \ |
| > "$OUTPUT/$CROSS_BASE"root.cpio.gz |
| rmdir "$MYBUILD" "$BUILD" 2>/dev/null # remove if empty |