#!/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" CROSS_SHORT="$CROSS_SHORT" "$0" "$@" die() { echo "$@" >&2; exit 1; } announce() { echo -e "\033]2;$CROSS_SHORT $*\007\n=== $*"; } getcross() { X="$(echo "$CCC/$1"-*cross/bin/"$1"*-cc)"; echo "${X%cc}"; } # assign command line NAME=VALUE args to env vars while [ $# -ne 0 ]; do X="${1/=*/}" Y="${1#*=}" [ "${1/=/}" != "$1" ] && eval "export $X=\"\$Y\"" || PKG="$PKG $i" shift done if [ ! -z "$CROSS" ]; then [ ! -d "${CCC:=$PWD/ccc}" ] && die "No ccc symlink to compiler directory." CCCLIST="$(ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs)" if [ "$CROSS" == all ]; then for i in $CCCLIST; do CROSS_COMPILE="$(getcross $i)" exec "$0" "$@"; done elif [ ! -e "${CROSS_COMPILE:=$(getcross $CROSS)}cc" ]; then ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs exit 0 fi fi # If we're cross compiling, set appropriate environment variables. if [ -z "$CROSS_COMPILE" ]; then if ! cc --static -xc - -o /dev/null <<< "int main(void) {return 0;}"; then echo "Warning: host compiler can't create static binaries." >&2 sleep 3 fi else CROSS_PATH="$(dirname "$(which "${CROSS_COMPILE}cc")")" CROSS_BASE="$(basename "$CROSS_COMPILE")" [ -z "$CROSS_SHORT" ] && CROSS_SHORT="${CROSS_BASE/-*/}" [ -z "$CROSS_PATH" ] && die "no ${CROSS_COMPILE}cc in path" fi echo "Building for ${CROSS_SHORT:=host}" # set up directories (can override most of these paths on cmdline) TOP="$PWD/root" [ -z "$BUILD" ] && BUILD="$TOP/build" [ -z "$AIRLOCK" ] && AIRLOCK="$TOP/airlock" [ -z "$OUTPUT" ] && OUTPUT="$TOP/$CROSS_SHORT" [ -z "$ROOT" ] && ROOT="$OUTPUT/${CROSS_BASE}fs" && rm -rf "$ROOT" MYBUILD="$BUILD/${CROSS_BASE:-host-}tmp" rm -rf "$MYBUILD" && mkdir -p "$MYBUILD" || exit 1 # Stabilize cross compiling by providing known $PATH contents if [ ! -z "$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 files and directories 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} "$ROOT" || exit 1 # init script. Runs as pid 1 from initramfs to set up and hand off system. cat > "$ROOT"/init << 'EOF' && #!/bin/sh export HOME=/home PATH=/bin:/sbin mountpoint -q proc || mount -t proc proc proc mountpoint -q sys || mount -t sysfs sys sys if ! mountpoint -q dev; then mount -t devtmpfs dev dev || mdev -s 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 if [ $$ -eq 1 ]; then # Setup networking for QEMU (needs /proc) ifconfig eth0 10.0.2.15 route add default gw 10.0.2.2 [ "$(date +%s)" -lt 1000 ] && rdate 10.0.2.2 # Ask QEMU what time it is [ "$(date +%s)" -lt 10000000 ] && ntpd -nq -p north-america.pool.ntp.org [ -z "$CONSOLE" ] && CONSOLE="$( "$ROOT"/etc/passwd << 'EOF' && root::0:0:root:/root:/bin/sh guest:x:500:500:guest:/home/guest:/bin/sh nobody:x:65534:65534:nobody:/proc/self:/dev/null EOF echo -e 'root:x:0:\nguest:x:500:\nnobody:x:65534:' > "$ROOT"/etc/group && # Google's public nameserver. echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf || exit 1 # Build toybox announce toybox make clean make $([ -z .config ] && echo defconfig || echo silentoldconfig) LDFLAGS=--static PREFIX="$ROOT" make toybox install || exit 1 write_miniconfig() { # Generic options for all targets KCGLOB=EARLY_PRINTK,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 echo "# make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG=$TARGET.miniconf" echo "# make ARCH=$KARCH -j \$(nproc)" echo "# boot $VMLINUX" echo echo "# CONFIG_EMBEDDED is not set" # Expand list of =y symbols for i in $KCGLOB $KCONF; do echo "# architecture ${X:-independent}" sed -E '/^$/d;s/([^,]*)($|,)/CONFIG_\1=y\n/g' <<< "$i" X=specific done echo "$KERNEL_CONFIG" } if [ -z "$LINUX" ] || [ ! -d "$LINUX/kernel" ]; then echo 'No $LINUX directory, kernel build skipped.' else # Which architecture are we building a kernel for? [ -z "$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" == 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" == 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 [ "$TARGET" == powerpc64le ]; then KARCH=powerpc QEMU="ppc64 -M pseries -vga none" KARGS=/dev/hvc0 VMLINUX=vmlinux KCONF=PPC64,PPC_PSERIES,CPU_LITTLE_ENDIAN,PPC_OF_BOOT_TRAMPOLINE,BLK_DEV_SD,SCSI_LOWLEVEL,SCSI_IBMVSCSI,ATA,NET_VENDOR_IBM,IBMVETH,HVC_CONSOLE,PPC_TRANSACTIONAL_MEM,PPC_DISABLE_WERROR,SECTION_MISMATCH_WARN_ONLY elif [ "$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 [ "$TARGET" == sh4 ] ; then QEMU="sh4 -M r2d -serial null -serial mon:stdio" KARCH=sh KARGS="ttySC1 noiotrap" VMLINUX=arch/sh/boot/zImage KERNEL_CONFIG="CONFIG_MEMORY_START=0x0c000000" KCONF=CPU_SUBTYPE_SH7751R,MMU,VSYSCALL,SH_FPU,SH_RTS7751R2D,RTS7751R2D_PLUS,SERIAL_SH_SCI,SERIAL_SH_SCI_CONSOLE,PCI,NET_VENDOR_REALTEK,8139CP,PCI,BLK_DEV_SD,ATA,ATA_SFF,ATA_BMDMA,PATA_PLATFORM,BINFMT_ELF_FDPIC,BINFMT_FLAT #see also SPI SPI_SH_SCI MFD_SM501 RTC_CLASS RTC_DRV_R9701 RTC_DRV_SH RTC_HCTOSYS else die "Unknown \$TARGET" fi # Write the qemu launch script echo "qemu-system-$QEMU" '"$@"' -nographic -no-reboot -m 256 \ "-kernel $(basename "$VMLINUX") -initrd ${CROSS_BASE}root.cpio.gz" \ "-append \"panic=1 HOST=$TARGET console=$KARGS \$KARGS\"" \ ${DTB:+-dtb "$(basename "$DTB")"} > "$OUTPUT/qemu-$TARGET.sh" && chmod +x "$OUTPUT/qemu-$TARGET.sh" && announce "linux-$KARCH" pushd "$LINUX" && make distclean && popd && cp -sfR "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" || exit 1 write_miniconfig > "$OUTPUT/miniconfig-$TARGET" && make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" && make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) || exit 1 # If we have a device tree binary, save it for QEMU. if [ ! -z "$DTB" ]; then cp "$DTB" "$OUTPUT/$(basename "$DTB")" || exit 1 fi cp "$VMLINUX" "$OUTPUT/$(basename "$VMLINUX")" && cd .. && rm -rf linux && popd || exit 1 fi for i in $PKG; do announce "$i"; ./$i; done rmdir "$MYBUILD" "$BUILD" 2>/dev/null # package root filesystem for initramfs. # we do it here so module install can add files (not implemented yet) announce "${CROSS_BASE}root.cpio.gz" (cd "$ROOT" && find . | cpio -o -H newc | gzip) > \ "$OUTPUT/${CROSS_BASE}root.cpio.gz"