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-rw-r--r--COPYING14
-rwxr-xr-xbuild.sh113
-rw-r--r--config-kernel571
-rwxr-xr-xdebootstrap.sh25
-rw-r--r--init.c24
-rw-r--r--kernel.patch13
-rw-r--r--lilo.conf14
-rw-r--r--musl.patch25
-rw-r--r--nethack.patch211
9 files changed, 1010 insertions, 0 deletions
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..226832e
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,14 @@
+Coypright (c) 2016 Reiner Herrmann <reiner@reiner-h.de>
+
+Permission to use, copy, modify, and/or distribute this software for
+any purpose with or without fee is hereby granted, provided that the
+above copyright notice and this permission notice appear in all
+copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..8568131
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,113 @@
+#!/bin/bash
+
+set -e
+set -x
+
+BUILDDIR=/tmp/build
+SRCDIR=$(dirname $(realpath "$0"))
+
+SIZE_CFLAGS="-I/tmp/build/include -I/tmp/build/include/ncurses -Os -ffunction-sections -fdata-sections -fno-asynchronous-unwind-tables"
+SIZE_LDFLAGS="-L/tmp/build/lib -Wl,--gc-sections -Wl,--strip-all"
+
+NPROC=$(grep -sc processor /proc/cpuinfo || echo 4)
+
+[ -d "$BUILDDIR" ] && exit 1
+
+mkdir -p "$BUILDDIR"/rootfs/{dev,lib/terminfo/l,nethack,sbin}
+pushd "$BUILDDIR"
+
+
+# install build dependencies
+grep -q ^deb-src /etc/apt/sources.list
+su -c "export DEBIAN_FRONTEND=noninteractive;
+ apt-get update;
+ apt-get install --yes build-essential gcc-4.9 upx-ucl gawk lilo ca-certificates;
+ apt-get build-dep --yes musl nethack ncurses linux"
+
+
+# download sources
+pushd "$SRCDIR"
+[ -f "ncurses-6.0.tar.gz" ] || wget "https://ftp.gnu.org/gnu/ncurses/ncurses-6.0.tar.gz"
+[ $(md5sum "ncurses-6.0.tar.gz" | cut -d ' ' -f 1) = "ee13d052e1ead260d7c28071f46eefb1" ] || exit 1
+[ -f "nethack-360-src.tgz" ] || wget "http://prdownloads.sourceforge.net/nethack/nethack-360-src.tgz?download" -O "nethack-360-src.tgz"
+[ $(md5sum "nethack-360-src.tgz" | cut -d ' ' -f 1) = "d42147b26e5fb4746fb72536ce145984" ] || exit 1
+[ -f "linux-2.6.32.70.tar.xz" ] || wget "https://cdn.kernel.org/pub/linux/kernel/v2.6/longterm/v2.6.32/linux-2.6.32.70.tar.xz"
+[ $(md5sum "linux-2.6.32.70.tar.xz" | cut -d ' ' -f 1) = "1a3ae82aab5acb3cb42e8514ee460a71" ] || exit 1
+popd
+
+
+# build musl
+apt-get source musl
+
+pushd musl-*/
+patch -p1 < "$SRCDIR/musl.patch"
+dpkg-buildpackage -us -uc -jauto
+popd
+
+su -c "dpkg -i musl_*.deb musl-dev_*.deb musl-tools_*.deb"
+
+
+# build ncurses
+tar zxf "$SRCDIR"/ncurses-*.tar.gz
+
+pushd ncurses-*/
+./configure --prefix="$BUILDDIR" --with-terminfo-dirs=/lib/terminfo --without-shared --without-gpm AWK="gawk" CC="musl-gcc" CFLAGS="$SIZE_CFLAGS" LDFLAGS="$SIZE_LDFLAGS"
+make -j$NPROC
+make install
+install -m 644 "$BUILDDIR/share/terminfo/l/linux" "$BUILDDIR/rootfs/lib/terminfo/l/"
+popd
+
+
+# extract kernel for headers
+tar Jxf "$SRCDIR"/linux-*.tar.xz
+cp -a linux-*/include/linux "$BUILDDIR/include/"
+
+
+# build nethack
+tar zxf "$SRCDIR"/nethack-*-src.tgz
+
+pushd nethack-*/
+patch -p1 < "$SRCDIR/nethack.patch"
+pushd sys/unix
+./setup.sh
+popd
+make -j$NPROC nethack CC="musl-gcc" LINK="musl-gcc" CFLAGS="-I../include $SIZE_CFLAGS -flto" LFLAGS="$SIZE_LDFLAGS -flto -static"
+make -C dat CFLAGS="-I../include"
+make dlb CC="musl-gcc" LINK="musl-gcc" CFLAGS="-I../include $SIZE_CFLAGS -flto" LFLAGS="$SIZE_LDFLAGS -flto"
+upx --ultra-brute --overlay=strip src/nethack
+install -m 755 src/nethack "$BUILDDIR/rootfs/nethack"
+install -m 644 dat/nhdat "$BUILDDIR/rootfs/nethack"
+touch "$BUILDDIR/rootfs/nethack/perm"
+popd
+
+
+# build init
+musl-gcc "$SRCDIR/init.c" -o "$BUILDDIR/rootfs/sbin/init" $SIZE_CFLAGS $SIZE_LDFLAGS -flto -static
+
+
+# build kernel
+echo "nod /dev/console 0600 0 0 c 5 1" > rootfs-files.txt
+pushd linux-*/
+patch -p1 < "$SRCDIR/kernel.patch"
+cp "$SRCDIR/config-kernel" .config
+make oldconfig
+make -j$NPROC bzImage CC="gcc-4.9"
+popd
+
+
+# create floppy
+dd if=/dev/zero of=floppy.img bs=1024 count=1440
+/sbin/mkfs.minix floppy.img
+mkdir -p "$BUILDDIR/mnt"
+su -c "
+ set -ex;
+ mount floppy.img \"$BUILDDIR/mnt\";
+ mkdir \"$BUILDDIR\"/mnt/{boot,dev};
+ mount /dev \"$BUILDDIR/mnt/dev\" -o bind;
+ cp \"$BUILDDIR\"/linux-*/arch/x86/boot/bzImage \"$SRCDIR/lilo.conf\" \"$BUILDDIR/mnt/\";
+ lilo -g -r \"$BUILDDIR/mnt\" -C /lilo.conf;
+ rm \"$BUILDDIR/mnt/lilo.conf\";
+ umount \"$BUILDDIR/mnt/dev\" \"$BUILDDIR/mnt\";
+"
+
+printf "\n\nFinished! Result is at $BUILDDIR/floppy.img\n\n"
diff --git a/config-kernel b/config-kernel
new file mode 100644
index 0000000..c531c64
--- /dev/null
+++ b/config-kernel
@@ -0,0 +1,571 @@
+#
+# Automatically generated make config: don't edit
+# Linux kernel version: 2.6.32.70
+# Sat Jan 30 16:41:05 2016
+#
+CONFIG_64BIT=y
+# CONFIG_X86_32 is not set
+CONFIG_X86_64=y
+CONFIG_X86=y
+CONFIG_OUTPUT_FORMAT="elf64-x86-64"
+CONFIG_ARCH_DEFCONFIG="arch/x86/configs/x86_64_defconfig"
+CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CMOS_UPDATE=y
+CONFIG_CLOCKSOURCE_WATCHDOG=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
+CONFIG_LOCKDEP_SUPPORT=y
+CONFIG_STACKTRACE_SUPPORT=y
+CONFIG_HAVE_LATENCYTOP_SUPPORT=y
+CONFIG_MMU=y
+CONFIG_ZONE_DMA=y
+CONFIG_GENERIC_ISA_DMA=y
+CONFIG_GENERIC_IOMAP=y
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_ARCH_MAY_HAVE_PC_FDC=y
+# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_TIME_VSYSCALL=y
+CONFIG_ARCH_HAS_CPU_RELAX=y
+CONFIG_ARCH_HAS_DEFAULT_IDLE=y
+CONFIG_ARCH_HAS_CACHE_LINE_SIZE=y
+CONFIG_HAVE_SETUP_PER_CPU_AREA=y
+CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
+CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK=y
+# CONFIG_HAVE_CPUMASK_OF_CPU_MAP is not set
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ZONE_DMA32=y
+CONFIG_ARCH_POPULATES_NODE_MAP=y
+CONFIG_AUDIT_ARCH=y
+CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING=y
+CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
+CONFIG_GENERIC_IRQ_PROBE=y
+# CONFIG_KTIME_SCALAR is not set
+CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
+CONFIG_CONSTRUCTORS=y
+
+#
+# General setup
+#
+# CONFIG_EXPERIMENTAL is not set
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
+CONFIG_LOCALVERSION=""
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_HAVE_KERNEL_GZIP=y
+CONFIG_HAVE_KERNEL_BZIP2=y
+CONFIG_HAVE_KERNEL_LZMA=y
+# CONFIG_KERNEL_GZIP is not set
+# CONFIG_KERNEL_BZIP2 is not set
+CONFIG_KERNEL_LZMA=y
+# CONFIG_SYSVIPC is not set
+# CONFIG_BSD_PROCESS_ACCT is not set
+
+#
+# RCU Subsystem
+#
+CONFIG_TREE_RCU=y
+# CONFIG_TREE_PREEMPT_RCU is not set
+# CONFIG_RCU_TRACE is not set
+CONFIG_RCU_FANOUT=64
+# CONFIG_RCU_FANOUT_EXACT is not set
+# CONFIG_TREE_RCU_TRACE is not set
+# CONFIG_IKCONFIG is not set
+CONFIG_LOG_BUF_SHIFT=17
+CONFIG_HAVE_UNSTABLE_SCHED_CLOCK=y
+# CONFIG_CGROUPS is not set
+# CONFIG_RELAY is not set
+# CONFIG_NAMESPACES is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="../rootfs ../rootfs-files.txt"
+CONFIG_INITRAMFS_ROOT_UID=0
+CONFIG_INITRAMFS_ROOT_GID=0
+# CONFIG_RD_GZIP is not set
+# CONFIG_RD_BZIP2 is not set
+CONFIG_RD_LZMA=y
+CONFIG_INITRAMFS_COMPRESSION_NONE=y
+# CONFIG_INITRAMFS_COMPRESSION_GZIP is not set
+# CONFIG_INITRAMFS_COMPRESSION_BZIP2 is not set
+# CONFIG_INITRAMFS_COMPRESSION_LZMA is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_EMBEDDED=y
+# CONFIG_SYSCTL_SYSCALL is not set
+# CONFIG_KALLSYMS is not set
+# CONFIG_HOTPLUG is not set
+CONFIG_PRINTK=y
+# CONFIG_BUG is not set
+# CONFIG_ELF_CORE is not set
+# CONFIG_PCSPKR_PLATFORM is not set
+# CONFIG_BASE_FULL is not set
+# CONFIG_FUTEX is not set
+# CONFIG_EPOLL is not set
+# CONFIG_SIGNALFD is not set
+# CONFIG_TIMERFD is not set
+# CONFIG_EVENTFD is not set
+# CONFIG_SHMEM is not set
+# CONFIG_AIO is not set
+CONFIG_HAVE_PERF_EVENTS=y
+
+#
+# Kernel Performance Events And Counters
+#
+# CONFIG_PERF_EVENTS is not set
+# CONFIG_PERF_COUNTERS is not set
+# CONFIG_VM_EVENT_COUNTERS is not set
+# CONFIG_COMPAT_BRK is not set
+# CONFIG_SLAB is not set
+# CONFIG_SLUB is not set
+CONFIG_SLOB=y
+# CONFIG_PROFILING is not set
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
+CONFIG_HAVE_IOREMAP_PROT=y
+CONFIG_HAVE_KPROBES=y
+CONFIG_HAVE_KRETPROBES=y
+CONFIG_HAVE_ARCH_TRACEHOOK=y
+CONFIG_HAVE_DMA_ATTRS=y
+CONFIG_HAVE_DMA_API_DEBUG=y
+
+#
+# GCOV-based kernel profiling
+#
+# CONFIG_SLOW_WORK is not set
+# CONFIG_HAVE_GENERIC_DMA_COHERENT is not set
+CONFIG_BASE_SMALL=1
+# CONFIG_MODULES is not set
+# CONFIG_BLOCK is not set
+# CONFIG_FREEZER is not set
+
+#
+# Processor type and features
+#
+# CONFIG_NO_HZ is not set
+# CONFIG_HIGH_RES_TIMERS is not set
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+# CONFIG_SMP is not set
+CONFIG_X86_MPPARSE=y
+# CONFIG_X86_EXTENDED_PLATFORM is not set
+# CONFIG_SCHED_OMIT_FRAME_POINTER is not set
+# CONFIG_PARAVIRT_GUEST is not set
+# CONFIG_MEMTEST is not set
+# CONFIG_M386 is not set
+# CONFIG_M486 is not set
+# CONFIG_M586 is not set
+# CONFIG_M586TSC is not set
+# CONFIG_M586MMX is not set
+# CONFIG_M686 is not set
+# CONFIG_MPENTIUMII is not set
+# CONFIG_MPENTIUMIII is not set
+# CONFIG_MPENTIUMM is not set
+# CONFIG_MPENTIUM4 is not set
+# CONFIG_MK6 is not set
+# CONFIG_MK7 is not set
+# CONFIG_MK8 is not set
+# CONFIG_MCRUSOE is not set
+# CONFIG_MEFFICEON is not set
+# CONFIG_MWINCHIPC6 is not set
+# CONFIG_MWINCHIP3D is not set
+# CONFIG_MGEODEGX1 is not set
+# CONFIG_MGEODE_LX is not set
+# CONFIG_MCYRIXIII is not set
+# CONFIG_MVIAC3_2 is not set
+# CONFIG_MVIAC7 is not set
+# CONFIG_MPSC is not set
+# CONFIG_MCORE2 is not set
+# CONFIG_MATOM is not set
+CONFIG_GENERIC_CPU=y
+CONFIG_X86_CPU=y
+CONFIG_X86_L1_CACHE_BYTES=64
+CONFIG_X86_INTERNODE_CACHE_BYTES=64
+CONFIG_X86_CMPXCHG=y
+CONFIG_X86_L1_CACHE_SHIFT=6
+CONFIG_X86_XADD=y
+CONFIG_X86_WP_WORKS_OK=y
+CONFIG_X86_TSC=y
+CONFIG_X86_CMPXCHG64=y
+CONFIG_X86_CMOV=y
+CONFIG_X86_MINIMUM_CPU_FAMILY=64
+CONFIG_X86_DEBUGCTLMSR=y
+# CONFIG_PROCESSOR_SELECT is not set
+CONFIG_CPU_SUP_INTEL=y
+CONFIG_CPU_SUP_AMD=y
+CONFIG_CPU_SUP_CENTAUR=y
+# CONFIG_X86_DS is not set
+CONFIG_HPET_TIMER=y
+# CONFIG_DMI is not set
+CONFIG_SWIOTLB=y
+CONFIG_IOMMU_HELPER=y
+# CONFIG_IOMMU_API is not set
+CONFIG_NR_CPUS=1
+# CONFIG_IRQ_TIME_ACCOUNTING is not set
+# CONFIG_PREEMPT_NONE is not set
+CONFIG_PREEMPT_VOLUNTARY=y
+# CONFIG_PREEMPT is not set
+CONFIG_X86_LOCAL_APIC=y
+CONFIG_X86_IO_APIC=y
+# CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS is not set
+# CONFIG_X86_MCE is not set
+# CONFIG_X86_16BIT is not set
+# CONFIG_I8K is not set
+# CONFIG_MICROCODE is not set
+# CONFIG_X86_MSR is not set
+# CONFIG_X86_CPUID is not set
+CONFIG_ARCH_PHYS_ADDR_T_64BIT=y
+# CONFIG_DIRECT_GBPAGES is not set
+CONFIG_ARCH_SPARSEMEM_DEFAULT=y
+CONFIG_ARCH_SPARSEMEM_ENABLE=y
+CONFIG_ARCH_SELECT_MEMORY_MODEL=y
+CONFIG_ILLEGAL_POINTER_VALUE=0xdead000000000000
+CONFIG_SELECT_MEMORY_MODEL=y
+# CONFIG_FLATMEM_MANUAL is not set
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+CONFIG_SPARSEMEM_MANUAL=y
+CONFIG_SPARSEMEM=y
+CONFIG_HAVE_MEMORY_PRESENT=y
+CONFIG_SPARSEMEM_EXTREME=y
+CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
+# CONFIG_SPARSEMEM_VMEMMAP is not set
+CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_SPLIT_PTLOCK_CPUS=4
+CONFIG_PHYS_ADDR_T_64BIT=y
+CONFIG_ZONE_DMA_FLAG=1
+CONFIG_VIRT_TO_BUS=y
+CONFIG_HAVE_MLOCK=y
+CONFIG_HAVE_MLOCKED_PAGE_BIT=y
+# CONFIG_KSM is not set
+CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
+# CONFIG_X86_CHECK_BIOS_CORRUPTION is not set
+# CONFIG_X86_RESERVE_LOW_64K is not set
+# CONFIG_MTRR is not set
+# CONFIG_ARCH_RANDOM is not set
+# CONFIG_SECCOMP is not set
+# CONFIG_CC_STACKPROTECTOR is not set
+# CONFIG_HZ_100 is not set
+CONFIG_HZ_250=y
+# CONFIG_HZ_300 is not set
+# CONFIG_HZ_1000 is not set
+CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
+# CONFIG_KEXEC is not set
+# CONFIG_CRASH_DUMP is not set
+CONFIG_PHYSICAL_START=0x1000000
+# CONFIG_RELOCATABLE is not set
+CONFIG_PHYSICAL_ALIGN=0x1000000
+# CONFIG_CMDLINE_BOOL is not set
+CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
+
+#
+# Power management and ACPI options
+#
+# CONFIG_PM is not set
+# CONFIG_SFI is not set
+
+#
+# CPU Frequency scaling
+#
+# CONFIG_CPU_FREQ is not set
+# CONFIG_CPU_IDLE is not set
+
+#
+# Memory power savings
+#
+
+#
+# Bus options (PCI etc.)
+#
+# CONFIG_PCI is not set
+# CONFIG_ARCH_SUPPORTS_MSI is not set
+CONFIG_ISA_DMA_API=y
+
+#
+# Executable file formats / Emulations
+#
+CONFIG_BINFMT_ELF=y
+# CONFIG_HAVE_AOUT is not set
+# CONFIG_BINFMT_MISC is not set
+# CONFIG_IA32_EMULATION is not set
+# CONFIG_COMPAT_FOR_U64_ALIGNMENT is not set
+# CONFIG_NET is not set
+
+#
+# Device Drivers
+#
+
+#
+# Generic Driver Options
+#
+CONFIG_STANDALONE=y
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_SYS_HYPERVISOR is not set
+# CONFIG_MTD is not set
+# CONFIG_PARPORT is not set
+# CONFIG_MISC_DEVICES is not set
+CONFIG_HAVE_IDE=y
+
+#
+# SCSI device support
+#
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SCSI_NETLINK is not set
+# CONFIG_MACINTOSH_DRIVERS is not set
+# CONFIG_PHONE is not set
+
+#
+# Input device support
+#
+CONFIG_INPUT=y
+# CONFIG_INPUT_FF_MEMLESS is not set
+# CONFIG_INPUT_POLLDEV is not set
+
+#
+# Userland interfaces
+#
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_JOYDEV is not set
+# CONFIG_INPUT_EVDEV is not set
+# CONFIG_INPUT_EVBUG is not set
+
+#
+# Input Device Drivers
+#
+CONFIG_INPUT_KEYBOARD=y
+CONFIG_KEYBOARD_ATKBD=y
+# CONFIG_KEYBOARD_LKKBD is not set
+# CONFIG_KEYBOARD_NEWTON is not set
+# CONFIG_KEYBOARD_OPENCORES is not set
+# CONFIG_KEYBOARD_STOWAWAY is not set
+# CONFIG_KEYBOARD_SUNKBD is not set
+# CONFIG_KEYBOARD_XTKBD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_INPUT_JOYSTICK is not set
+# CONFIG_INPUT_TABLET is not set
+# CONFIG_INPUT_TOUCHSCREEN is not set
+# CONFIG_INPUT_MISC is not set
+
+#
+# Hardware I/O ports
+#
+CONFIG_SERIO=y
+CONFIG_SERIO_I8042=y
+# CONFIG_SERIO_SERPORT is not set
+# CONFIG_SERIO_CT82C710 is not set
+CONFIG_SERIO_LIBPS2=y
+# CONFIG_SERIO_RAW is not set
+# CONFIG_GAMEPORT is not set
+
+#
+# Character devices
+#
+CONFIG_VT=y
+# CONFIG_CONSOLE_TRANSLATIONS is not set
+CONFIG_VT_CONSOLE=y
+CONFIG_HW_CONSOLE=y
+# CONFIG_VT_HW_CONSOLE_BINDING is not set
+# CONFIG_DEVKMEM is not set
+# CONFIG_SERIAL_NONSTANDARD is not set
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+CONFIG_FIX_EARLYCON_MEM=y
+
+#
+# Non-8250 serial port support
+#
+# CONFIG_UNIX98_PTYS is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_IPMI_HANDLER is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_NVRAM is not set
+# CONFIG_RTC is not set
+# CONFIG_GEN_RTC is not set
+# CONFIG_R3964 is not set
+# CONFIG_MWAVE is not set
+# CONFIG_PC8736x_GPIO is not set
+# CONFIG_HANGCHECK_TIMER is not set
+# CONFIG_I2C is not set
+# CONFIG_SPI is not set
+
+#
+# PPS support
+#
+CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
+# CONFIG_GPIOLIB is not set
+# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
+# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
+# CONFIG_WATCHDOG is not set
+CONFIG_SSB_POSSIBLE=y
+
+#
+# Sonics Silicon Backplane
+#
+# CONFIG_SSB is not set
+
+#
+# Multifunction device drivers
+#
+# CONFIG_MFD_CORE is not set
+# CONFIG_MFD_SM501 is not set
+# CONFIG_HTC_PASIC3 is not set
+# CONFIG_MFD_TMIO is not set
+# CONFIG_REGULATOR is not set
+# CONFIG_MEDIA_SUPPORT is not set
+
+#
+# Graphics support
+#
+# CONFIG_VGASTATE is not set
+# CONFIG_VIDEO_OUTPUT_CONTROL is not set
+# CONFIG_FB is not set
+# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+
+#
+# Display device support
+#
+# CONFIG_DISPLAY_SUPPORT is not set
+
+#
+# Console display driver support
+#
+CONFIG_VGA_CONSOLE=y
+# CONFIG_VGACON_SOFT_SCROLLBACK is not set
+CONFIG_DUMMY_CONSOLE=y
+# CONFIG_SOUND is not set
+# CONFIG_HID_SUPPORT is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_MMC is not set
+# CONFIG_MEMSTICK is not set
+# CONFIG_NEW_LEDS is not set
+# CONFIG_ACCESSIBILITY is not set
+# CONFIG_EDAC is not set
+# CONFIG_RTC_CLASS is not set
+# CONFIG_DMADEVICES is not set
+# CONFIG_AUXDISPLAY is not set
+# CONFIG_UIO is not set
+
+#
+# TI VLYNQ
+#
+# CONFIG_STAGING is not set
+# CONFIG_X86_PLATFORM_DEVICES is not set
+
+#
+# Firmware Drivers
+#
+# CONFIG_EDD is not set
+# CONFIG_FIRMWARE_MEMMAP is not set
+# CONFIG_DELL_RBU is not set
+# CONFIG_DCDBAS is not set
+# CONFIG_ISCSI_IBFT_FIND is not set
+
+#
+# File systems
+#
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_FSNOTIFY is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+# CONFIG_QUOTA is not set
+# CONFIG_AUTOFS_FS is not set
+# CONFIG_AUTOFS4_FS is not set
+# CONFIG_FUSE_FS is not set
+
+#
+# Caches
+#
+
+#
+# Pseudo filesystems
+#
+# CONFIG_PROC_FS is not set
+# CONFIG_SYSFS is not set
+# CONFIG_HUGETLBFS is not set
+# CONFIG_HUGETLB_PAGE is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+# CONFIG_NLS is not set
+
+#
+# Kernel hacking
+#
+CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+# CONFIG_PRINTK_TIME is not set
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_FRAME_WARN=2048
+# CONFIG_MAGIC_SYSRQ is not set
+CONFIG_STRIP_ASM_SYMS=y
+# CONFIG_UNUSED_SYMBOLS is not set
+# CONFIG_HEADERS_CHECK is not set
+# CONFIG_DEBUG_KERNEL is not set
+# CONFIG_DEBUG_MEMORY_INIT is not set
+CONFIG_ARCH_WANT_FRAME_POINTERS=y
+# CONFIG_FRAME_POINTER is not set
+# CONFIG_RCU_CPU_STALL_DETECTOR is not set
+# CONFIG_LATENCYTOP is not set
+CONFIG_USER_STACKTRACE_SUPPORT=y
+CONFIG_HAVE_FUNCTION_TRACER=y
+CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
+CONFIG_HAVE_FUNCTION_GRAPH_FP_TEST=y
+CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST=y
+CONFIG_HAVE_DYNAMIC_FTRACE=y
+CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
+CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
+CONFIG_TRACING_SUPPORT=y
+# CONFIG_FTRACE is not set
+# CONFIG_DMA_API_DEBUG is not set
+# CONFIG_SAMPLES is not set
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_ARCH_KMEMCHECK=y
+# CONFIG_STRICT_DEVMEM is not set
+# CONFIG_X86_VERBOSE_BOOTUP is not set
+# CONFIG_EARLY_PRINTK is not set
+# CONFIG_IOMMU_STRESS is not set
+CONFIG_HAVE_MMIOTRACE_SUPPORT=y
+CONFIG_IO_DELAY_TYPE_0X80=0
+CONFIG_IO_DELAY_TYPE_0XED=1
+CONFIG_IO_DELAY_TYPE_UDELAY=2
+CONFIG_IO_DELAY_TYPE_NONE=3
+CONFIG_IO_DELAY_0X80=y
+# CONFIG_IO_DELAY_0XED is not set
+# CONFIG_IO_DELAY_UDELAY is not set
+# CONFIG_IO_DELAY_NONE is not set
+CONFIG_DEFAULT_IO_DELAY_TYPE=0
+CONFIG_OPTIMIZE_INLINING=y
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITYFS is not set
+# CONFIG_SECURITY_FILE_CAPABILITIES is not set
+# CONFIG_CRYPTO is not set
+CONFIG_HAVE_KVM=y
+# CONFIG_VIRTUALIZATION is not set
+# CONFIG_BINARY_PRINTF is not set
+
+#
+# Library routines
+#
+CONFIG_GENERIC_FIND_FIRST_BIT=y
+CONFIG_GENERIC_FIND_NEXT_BIT=y
+CONFIG_GENERIC_FIND_LAST_BIT=y
+# CONFIG_CRC_CCITT is not set
+# CONFIG_CRC16 is not set
+# CONFIG_CRC_T10DIF is not set
+# CONFIG_CRC_ITU_T is not set
+# CONFIG_CRC32 is not set
+# CONFIG_CRC7 is not set
+# CONFIG_LIBCRC32C is not set
+CONFIG_DECOMPRESS_LZMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_HAS_DMA=y
diff --git a/debootstrap.sh b/debootstrap.sh
new file mode 100755
index 0000000..ead947d
--- /dev/null
+++ b/debootstrap.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+
+set -e
+set -x
+
+# will use about 2.1 GB
+DEBDIR=/tmp/debian-chroot
+
+RELEASE=stretch
+MIRROR=http://httpredir.debian.org/debian/
+
+[ -f "build.sh" ] || exit 1
+
+if [ $(pgrep -c apt-cacher-ng) -gt 0 ]; then
+ MIRROR="http://localhost:3142/httpredir.debian.org/debian"
+fi
+
+debootstrap $RELEASE "$DEBDIR" "$MIRROR"
+echo "deb-src $MIRROR $RELEASE main" >> "$DEBDIR/etc/apt/sources.list"
+
+cp -a * "$DEBDIR/usr/src"
+
+mknod "$DEBDIR/dev/loop0" b 7 0
+chroot "$DEBDIR" /usr/src/build.sh
+
diff --git a/init.c b/init.c
new file mode 100644
index 0000000..b77f3bd
--- /dev/null
+++ b/init.c
@@ -0,0 +1,24 @@
+#include <termios.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char *argv[])
+{
+ chdir("/nethack");
+ while(1) {
+ pid_t pid = fork();
+ if (pid == 0) {
+ execl("/nethack/nethack", "/nethack/nethack", NULL);
+ } else {
+ char buf[1];
+ waitpid(pid, NULL, 0);
+
+ /* wait so user can see highscore list */
+ write(STDOUT_FILENO, "\n\nPress [Return] to restart.\n", 29);
+ read(STDIN_FILENO, buf, sizeof(buf));
+ tcflush(STDIN_FILENO, TCIFLUSH);
+ }
+ }
+ return 0;
+}
diff --git a/kernel.patch b/kernel.patch
new file mode 100644
index 0000000..369b9c5
--- /dev/null
+++ b/kernel.patch
@@ -0,0 +1,13 @@
+diff --git a/kernel/timeconst.pl b/kernel/timeconst.pl
+index eb51d76..0461239 100644
+--- a/kernel/timeconst.pl
++++ b/kernel/timeconst.pl
+@@ -370,7 +370,7 @@ if ($hz eq '--can') {
+ }
+
+ @val = @{$canned_values{$hz}};
+- if (!defined(@val)) {
++ if (!@val) {
+ @val = compute_values($hz);
+ }
+ output($hz, @val);
diff --git a/lilo.conf b/lilo.conf
new file mode 100644
index 0000000..420c1f0
--- /dev/null
+++ b/lilo.conf
@@ -0,0 +1,14 @@
+boot = /dev/loop0
+#root = /dev/loop0
+disk = /dev/loop0
+ bios = 0x00
+ sectors = 18
+ heads = 2
+ cylinders = 80
+
+compact
+map = /lilo.map
+
+default = linux
+image = /bzImage
+ label = linux
diff --git a/musl.patch b/musl.patch
new file mode 100644
index 0000000..ef5a227
--- /dev/null
+++ b/musl.patch
@@ -0,0 +1,25 @@
+diff --git a/debian/patches/series b/debian/patches/series
+index 0a1013d..91ddd35 100644
+--- a/debian/patches/series
++++ b/debian/patches/series
+@@ -1 +1,2 @@
+ 20150515_ARM-thumb_compatibility.diff
++size_optimization.patch
+diff --git a/debian/patches/size_optimization.patch b/debian/patches/size_optimization.patch
+new file mode 100644
+index 0000000..08d48e1
+--- /dev/null
++++ b/debian/patches/size_optimization.patch
+@@ -0,0 +1,12 @@
++--- a/configure
+++++ b/configure
++@@ -379,6 +379,9 @@
++ tryflag CFLAGS_AUTO -fno-unwind-tables
++ tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
++
+++tryflag CFLAGS_AUTO -ffunction-sections
+++tryflag CFLAGS_AUTO -fdata-sections
+++
++ #
++ # The GNU toolchain defaults to assuming unmarked files need an
++ # executable stack, potentially exposing vulnerabilities in programs
diff --git a/nethack.patch b/nethack.patch
new file mode 100644
index 0000000..68359a1
--- /dev/null
+++ b/nethack.patch
@@ -0,0 +1,211 @@
+diff --git a/include/config.h b/include/config.h
+index 141a684..3a79679 100644
+--- a/include/config.h
++++ b/include/config.h
+@@ -188,7 +188,7 @@
+ #endif
+
+ #ifndef SYSCF
+-#define SYSCF /* use a global configuration */
++//#define SYSCF /* use a global configuration */
+ #define SYSCF_FILE "sysconf" /* global configuration is in a file */
+ #endif
+
+@@ -201,10 +201,10 @@
+
+ /* note: "larger" is in comparison with 'record', the high-scores file
+ (whose name can be overridden via #define in global.h if desired) */
+-#define LOGFILE "logfile" /* larger file for debugging purposes */
+-#define XLOGFILE "xlogfile" /* even larger logfile */
+-#define NEWS "news" /* the file containing the latest hack news */
+-#define PANICLOG "paniclog" /* log of panic and impossible events */
++//#define LOGFILE "logfile" /* larger file for debugging purposes */
++//#define XLOGFILE "xlogfile" /* even larger logfile */
++//#define NEWS "news" /* the file containing the latest hack news */
++//#define PANICLOG "paniclog" /* log of panic and impossible events */
+
+ /*
+ * PERSMAX, POINTSMIN, ENTRYMAX, PERS_IS_UID:
+@@ -250,8 +250,8 @@
+
+ #if defined(UNIX) && !defined(ZLIB_COMP) && !defined(COMPRESS)
+ /* path and file name extension for compression program */
+-#define COMPRESS "/usr/bin/compress" /* Lempel-Ziv compression */
+-#define COMPRESS_EXTENSION ".Z" /* compress's extension */
++//#define COMPRESS "/usr/bin/compress" /* Lempel-Ziv compression */
++//#define COMPRESS_EXTENSION ".Z" /* compress's extension */
+ /* An example of one alternative you might want to use: */
+ /* #define COMPRESS "/usr/local/bin/gzip" */ /* FSF gzip compression */
+ /* #define COMPRESS_EXTENSION ".gz" */ /* normal gzip extension */
+@@ -298,14 +298,14 @@
+ * a tar-like file, thus making a neater installation. See *conf.h
+ * for detailed configuration.
+ */
+-/* #define DLB */ /* not supported on all platforms */
++#define DLB /* not supported on all platforms */
+
+ /*
+ * Defining INSURANCE slows down level changes, but allows games that
+ * died due to program or system crashes to be resumed from the point
+ * of the last level change, after running a utility program.
+ */
+-#define INSURANCE /* allow crashed game recovery */
++//#define INSURANCE /* allow crashed game recovery */
+
+ #ifndef MAC
+ #define CHDIR /* delete if no chdir() available */
+@@ -317,7 +317,7 @@
+ * otherwise it will be the current directory.
+ */
+ #ifndef HACKDIR
+-#define HACKDIR "/usr/games/lib/nethackdir"
++//#define HACKDIR "/usr/games/lib/nethackdir"
+ #endif
+
+ /*
+@@ -340,7 +340,7 @@
+ /* If GENERIC_USERNAMES is defined, and the player's username is found
+ * in the list, prompt for character name instead of using username.
+ * A public server should probably disable this. */
+-#define GENERIC_USERNAMES "play player game games nethack nethacker"
++//#define GENERIC_USERNAMES "play player game games nethack nethacker"
+
+ /*
+ * Section 3: Definitions that may vary with system type.
+@@ -451,7 +451,7 @@ typedef unsigned char uchar;
+
+ /* FREE_ALL_MEMORY is neither experimental nor inadequately tested,
+ but it isn't necessary for successful operation of the program */
+-#define FREE_ALL_MEMORY /* free all memory at exit */
++//#define FREE_ALL_MEMORY /* free all memory at exit */
+
+ /* End of Section 4 */
+
+diff --git a/include/unixconf.h b/include/unixconf.h
+index 0447b82..ce535e6 100644
+--- a/include/unixconf.h
++++ b/include/unixconf.h
+@@ -33,10 +33,10 @@
+ /* define any of the following that are appropriate */
+ #define SVR4 /* use in addition to SYSV for System V Release 4 */
+ /* including Solaris 2+ */
+-#define NETWORK /* if running on a networked system */
++//#define NETWORK /* if running on a networked system */
+ /* e.g. Suns sharing a playground through NFS */
+ /* #define SUNOS4 */ /* SunOS 4.x */
+-/* #define LINUX */ /* Another Unix clone */
++#define LINUX /* Another Unix clone */
+ /* #define CYGWIN32 */ /* Unix on Win32 -- use with case sensitive defines */
+ /* #define GENIX */ /* Yet Another Unix Clone */
+ /* #define HISX */ /* Bull Unix for XPS Machines */
+@@ -55,8 +55,8 @@
+ #define TEXTCOLOR /* Use System V r3.2 terminfo color support
+ * and/or ANSI color support on termcap systems
+ * and/or X11 color */
+-#define POSIX_JOB_CONTROL /* use System V / Solaris 2.x / POSIX job control
+- * (e.g., VSUSP) */
++//#define POSIX_JOB_CONTROL /* use System V / Solaris 2.x / POSIX job control
++// * (e.g., VSUSP) */
+ #define POSIX_TYPES /* use POSIX types for system calls and termios */
+ /* Define for many recent OS releases, including
+ * those with specific defines (since types are
+@@ -128,7 +128,7 @@
+ * "extra output" method is used, but not all systems provide access to
+ * a fine-grained timer.
+ */
+-/* #define TIMED_DELAY */ /* usleep() */
++#define TIMED_DELAY /* usleep() */
+ #endif
+
+ /*
+@@ -139,7 +139,7 @@
+ * A stat system call is done on the mailbox every MAILCKFREQ moves.
+ */
+ #if !defined(NOMAIL)
+-#define MAIL /* Deliver mail during the game */
++//#define MAIL /* Deliver mail during the game */
+ #endif
+
+ /* The Andrew Message System does mail a little differently from normal
+@@ -213,7 +213,7 @@
+ * Comment out the USE_FCNTL if for some reason you have a strange
+ * OS/filesystem combination for which fcntl(2) does not work. */
+ #ifdef POSIX_TYPES
+-#define USE_FCNTL
++//#define USE_FCNTL
+ #endif
+
+ /*
+@@ -281,7 +281,7 @@
+ #define tgetch getchar
+
+ #ifndef NOSHELL
+-#define SHELL /* do not delete the '!' command */
++//#define SHELL /* do not delete the '!' command */
+ #endif
+
+ #include "system.h"
+diff --git a/src/options.c b/src/options.c
+index 87c4004..1f0c385 100644
+--- a/src/options.c
++++ b/src/options.c
+@@ -101,7 +101,7 @@ static struct Bool_Opt {
+ #if defined(MICRO) || defined(WIN32)
+ { "color", &iflags.wc_color, TRUE, SET_IN_GAME }, /*WC*/
+ #else /* systems that support multiple terminals, many monochrome */
+- { "color", &iflags.wc_color, FALSE, SET_IN_GAME }, /*WC*/
++ { "color", &iflags.wc_color, TRUE, SET_IN_GAME }, /*WC*/
+ #endif
+ { "confirm", &flags.confirm, TRUE, SET_IN_GAME },
+ { "dark_room", &flags.dark_room, TRUE, SET_IN_GAME },
+@@ -126,7 +126,7 @@ static struct Bool_Opt {
+ #endif
+ { "fullscreen", &iflags.wc2_fullscreen, FALSE, SET_IN_FILE },
+ { "help", &flags.help, TRUE, SET_IN_GAME },
+- { "hilite_pet", &iflags.wc_hilite_pet, FALSE, SET_IN_GAME }, /*WC*/
++ { "hilite_pet", &iflags.wc_hilite_pet, TRUE, SET_IN_GAME }, /*WC*/
+ { "hilite_pile", &iflags.hilite_pile, FALSE, SET_IN_GAME },
+ #ifndef MAC
+ { "ignintr", &flags.ignintr, FALSE, SET_IN_GAME },
+@@ -136,7 +136,7 @@ static struct Bool_Opt {
+ { "implicit_uncursed", &iflags.implicit_uncursed, TRUE, SET_IN_GAME },
+ { "large_font", &iflags.obsolete, FALSE, SET_IN_FILE }, /* OBSOLETE */
+ { "legacy", &flags.legacy, TRUE, DISP_IN_GAME },
+- { "lit_corridor", &flags.lit_corridor, FALSE, SET_IN_GAME },
++ { "lit_corridor", &flags.lit_corridor, TRUE, SET_IN_GAME },
+ { "lootabc", &flags.lootabc, FALSE, SET_IN_GAME },
+ #ifdef MAIL
+ { "mail", &flags.biff, TRUE, SET_IN_GAME },
+diff --git a/sys/unix/Makefile.src b/sys/unix/Makefile.src
+index 16d0874..8f5626a 100644
+--- a/sys/unix/Makefile.src
++++ b/sys/unix/Makefile.src
+@@ -222,8 +235,8 @@ WINBEOBJ =
+
+ #
+ #
+-#WINSRC = $(WINTTYSRC)
+-#WINOBJ = $(WINTTYOBJ)
++WINSRC = $(WINTTYSRC)
++WINOBJ = $(WINTTYOBJ)
+
+ # on some systems the termcap library is in -ltermcap or -lcurses
+ # on 386 Xenix, the -ltermlib tputs() seems not to work; use -lcurses instead
+@@ -238,7 +251,7 @@ WINBEOBJ =
+ # WINTTYLIB = -ltermcap
+ # WINTTYLIB = -lcurses
+ # WINTTYLIB = -lcurses16
+-# WINTTYLIB = -lncurses
++WINTTYLIB = -lncurses
+ #WINTTYLIB = -ltermlib
+ #
+ # libraries for X11
+@@ -263,7 +276,7 @@ WINGEMLIB = -le_gem -lgem
+ # libraries for BeOS
+ WINBELIB = -lbe
+
+-#WINLIB = $(WINTTYLIB)
++WINLIB = $(WINTTYLIB)
+
+ # any other strange libraries your system needs (for Sysunix only -- the more
+ # specialized targets should already be right)