Initial commit, based on prev work in https://github.com/humphd/next

2019-02-06 19:26:34 -05:00 · 2019-02-06 19:26:34 -05:00 · 93c360f79b
commit 93c360f79b
parent 06c54ce9b4
17 changed files with 657 additions and 3 deletions
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,5 @@
+dist/*
+
+.gitignore
+LICENSE
+README.md
--- a/.gitignore
+++ b/.gitignore
@ -0,0 +1 @@
+dist/
--- a/51
+++ b/51
@ -0,0 +1,51 @@
+FROM rastasheep/ubuntu-sshd:18.04
+
+# Buildroot version to use
+ARG BUILD_ROOT_RELEASE=2018.02
+# Root password for SSH
+ARG ROOT_PASSWORD=browser-vm
+
+# Copy v86 buildroot board config into image.
+# NOTE: if you want to override this later to play with
+# the config (e.g., run `make menuconfig`), mount a volume:
+# docker run ... -v $PWD/buildroot-v86:/buildroot-v86 ...
+COPY ./buildroot-v86 /buildroot-v86
+
+# Setup SSH (for Windows users) and prepare apt-get
+RUN echo 'root:${ROOT_PASSWORD}' | chpasswd; \
+    # Install all Buildroot deps
+    sed -i 's|deb http://us.archive.ubuntu.com/ubuntu/|deb mirror://mirrors.ubuntu.com/mirrors.txt|g' /etc/apt/sources.list; \
+    dpkg --add-architecture i386; \
+    rm -rf /var/lib/apt/lists/*; \
+    apt-get -q update;
+
+# Install all Buildroot deps and prepare buildroot
+WORKDIR /root
+RUN apt-get -q -y install \
+    bc \
+    build-essential \
+    bzr \
+    cpio \
+    cvs \
+    git \
+    unzip \
+    wget \
+    libc6:i386 \
+    libncurses5-dev \
+    libssl-dev \
+    rsync; \
+    wget -c http://buildroot.org/downloads/buildroot-${BUILD_ROOT_RELEASE}.tar.gz; \
+    tar axf buildroot-${BUILD_ROOT_RELEASE}.tar.gz;
+
+# configure the locales
+ENV LANG='C' \
+    LANGUAGE='en_US:en' \
+    LC_ALL='C' \ 
+    NOTVISIBLE="in users profile" \
+    TERM=xterm
+
+# Buildroot will place built artifacts here at the end.
+VOLUME /build
+
+WORKDIR /root/buildroot-${BUILD_ROOT_RELEASE}
+ENTRYPOINT ["/buildroot-v86/build-v86.sh"]
--- a/2
+++ b/2
@ -1,6 +1,6 @@
 MIT License

-Copyright (c) 2019 David Humphrey
+Copyright (c) 2018-2019 David Humphrey

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
--- a/README.md
+++ b/README.md
@ -1,2 +1,200 @@
-# browser-vm
-A small Linux x86 VM meant for use in the browser
+# Browser VM
+
+A custom [Buildroot](https://buildroot.org/) config for a Linux x86 VM, meant to
+be run in the browser.  The resulting Linux ISO is meant to be run under
+emulation in the browser via [v86](https://github.com/copy/v86), and includes:
+
+* a custom Linux 4.15 kernel, which strips out many unnecessary drivers, modules, etc. and adds [Plan 9 filesystem](https://www.kernel.org/doc/Documentation/filesystems/9p.txt) sharing
+* a root filesystem and Unix commands via [BusyBox](https://busybox.net/)
+* an ISO-based bootloader (i.e., we create a "DVD" that is booted by v86)
+
+Following the [Buildroot customization docs](https://buildroot.org/downloads/manual/manual.html#customize)
+we create a folder `buildroot-v86/` with all the necessary config files,
+filesystem overlay, and scripts necessary to build our distribution.
+
+## Running via Docker
+
+To build the Docker image:
+
+```bash
+$ docker build -t buildroot .
+```
+
+And then to run the build:
+
+```bash
+$ docker run \
+    --rm \
+    --name build-v86 \
+    -v $PWD/dist:/build \
+    -v $PWD/buildroot-v86/:/buildroot-v86 \
+    buildroot
+```
+
+NOTE: we define two [volumes](https://docs.docker.com/engine/reference/builder/#volume) to 
+allow the container to access the v86 config, and also to write the ISO once complete.  In the
+above I've used `$PWD`, but you can use any absolute path.
+
+When the build completes, an ISO file will be places in `./dist/v86-linux.iso`
+in your source tree (i.e., outside the container).
+
+If you need to re-configure things, instead of just running the build, do the following:
+
+```bash
+$ docker run \
+    --rm \
+    --name build-v86 \
+    -v $PWD/dist:/build \
+    -v $PWD/buildroot-v86/:/buildroot-v86 \
+    -ti \
+    --entrypoint "bash" \
+    buildroot
+```
+
+Now in the resulting bash terminal, you can run `make menuconfig` and [other make commands](https://buildroot.org/downloads/manual/manual.html#make-tips).
+
+## `buildroot-v86/` Layout
+
+We define a `v86` buildroot "board" via the following files and directories:
+
+```
+-- board/
+    +-- v86
+        +-- linux.config        # our custom Linux kernel config (make linux-menuconfig)
+        +-- post_build.sh       # script to copy ISO file out of docker container
+        +-- rootfs_overlay/     # overrides for files in the root filesystem
+            +-- etc/
+                +-- inittab     # we setup a ttyS0 console terminal to auto-login
+                +-- fstab       # we auto-mount the Plan 9 Filer filesystem to /mnt
+    +-- configs/
+        +-- v86_defconfig       # our custom buildroot config (make menuconfig)
+    +-- Config.in               # empty, but required https://buildroot.org/downloads/manual/manual.html#outside-br-custom
+    +-- external.mk             # empty, but required https://buildroot.org/downloads/manual/manual.html#outside-br-custom
+    +-- external.desc           # our v86 board config for make
+    +-- build-v86.sh            # entrypoint for Docker to run our build
+```
+
+If you need or want to update these config files, do the following:
+
+```bash
+$ make BR2_EXTERNAL=/buildroot-v86 v86_defconfig
+$ make menuconfig
+...
+$ make savedefconfig
+$ make linux-menuconfig
+...
+$ make linux-savedefconfig
+```
+
+## Configuration Notes
+
+These are the options I set when configuring buildroot for v86.  I'm only
+specifying the things I set.
+
+```bash
+$ cd buildroot-2018.02
+$ make menucofing
+```
+
+Then follow these config steps in the buildroot config menu (NOTE: these docs
+may have drifted from the actual config in the source, so consult that first):
+
+### Target options
+
+* Target Architecture: i386
+* Target Architecture Variant: pentium mobile (Pentium with MMX, SSE)
+
+### Build options
+
+* Enable compiler cache (not strictly necessary, but helps with rebuilds)
+
+### Toolchain
+
+* C library: uLibc-ng (I'd like to experiment with musl too)
+
+### System configuration
+
+* remount root filesystem read-write during boot (I think this is unnecessary)
+* Root filesystem overlay directories: /build/overlay-fs (for etc/inittab)
+
+### Kernel
+
+* Linux Kernel: true
+* Defconfig name: i386
+* Kernel binary format: bzImage (vmlinux seemed to break on boot)
+
+### Target packages
+
+Need to figure this out.  I tried adding imagemagik, git, uemacs, but they
+are all adding too much size to the image.
+
+### Filesystem images
+
+* cpio the root filesystem (for use as an initial RAM filesystem)
+* initial RAM filesystem linked into the linux kernel (not sure I need this, trying without...)
+* iso image
+    * Use initrd
+* tar the root filesystem Compression method (no compression)
+
+### Bootloaders
+
+* syslinux
+    * install isolinux
+
+## Linux configuration
+
+Now configure the Linux Kernel:
+
+```
+$ make linux-menuconfig
+```
+
+And set the following options to accomplish this:
+
+```
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_9P_FS=y
+CONFIG_9P_FS_POSIX_ACL=y
+CONFIG_PCI=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_PCI=y
+CONFIG_VIRTIO_PCI=y
+```
+
+# Processor type and features
+
+* Processor family (Pentium-Pro) also tried Pentium M before. 
+
+# Bus options (PCI, etc.)
+
+* PCI Debugging: true (I want to see what's happening with PCI errors, normally not needed)
+
+# Networking support
+
+* Plan 9 Resource Sharing Support (9P2000) (built into kernel * vs. M)
+    * 9P Virtio Transport (* - make this is on, it won't exist if virtio is off)
+    * Debug information (* - optional)
+
+# Device Drivers
+
+* Virtio drivers
+    * PCI driver for virtio devices (built into kernel * vs. M)
+        * Support for legacy virtio draft 0.9.X and older devices (New)
+    * Platform bus driver for memory mapped virtio devices (* vs. M) - not sure I need this...
+        * Memory mapped virtio devices parameter parsing - or this...
+
+# Filesystems
+
+* Caches
+    * General filesystem local caching manager (*)
+        * Filesystem caching on files (*)
+
+* Network File Systems
+    * Plan 9 Resource Sharing Support (9P2000) (*)
+        * Enable 9P client caching support
+        * 9P Posic Access Control Lists
+
+Now run `make`
+
+When it finishes, the built image is in `./output/images`.
--- a/buildroot-v86/Config.in
+++ b/buildroot-v86/Config.in
@ -0,0 +1 @@
+source "$BR2_EXTERNAL_v86_PATH/package/nled/Config.in"
--- a/buildroot-v86/board/v86/linux.config
+++ b/buildroot-v86/board/v86/linux.config
@ -0,0 +1,263 @@
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_AUDIT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_TASKSTATS=y
+CONFIG_TASK_DELAY_ACCT=y
+CONFIG_TASK_XACCT=y
+CONFIG_TASK_IO_ACCOUNTING=y
+CONFIG_LOG_BUF_SHIFT=18
+CONFIG_CGROUPS=y
+CONFIG_CGROUP_SCHED=y
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_NAMESPACES=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE="${BR_BINARIES_DIR}/rootfs.cpio"
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_PCSPKR_PLATFORM is not set
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PROFILING=y
+CONFIG_KPROBES=y
+CONFIG_JUMP_LABEL=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODULE_FORCE_UNLOAD=y
+CONFIG_PARTITION_ADVANCED=y
+CONFIG_OSF_PARTITION=y
+CONFIG_AMIGA_PARTITION=y
+CONFIG_MAC_PARTITION=y
+CONFIG_BSD_DISKLABEL=y
+CONFIG_MINIX_SUBPARTITION=y
+CONFIG_SOLARIS_X86_PARTITION=y
+CONFIG_UNIXWARE_DISKLABEL=y
+CONFIG_SGI_PARTITION=y
+CONFIG_SUN_PARTITION=y
+CONFIG_KARMA_PARTITION=y
+# CONFIG_X86_EXTENDED_PLATFORM is not set
+CONFIG_M686=y
+CONFIG_X86_GENERIC=y
+CONFIG_HPET_TIMER=y
+CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS=y
+CONFIG_X86_REBOOTFIXUPS=y
+CONFIG_MICROCODE_AMD=y
+CONFIG_X86_MSR=y
+CONFIG_X86_CPUID=y
+CONFIG_HIGHPTE=y
+CONFIG_X86_CHECK_BIOS_CORRUPTION=y
+# CONFIG_MTRR_SANITIZER is not set
+CONFIG_EFI=y
+CONFIG_HZ_100=y
+CONFIG_KEXEC=y
+CONFIG_CRASH_DUMP=y
+CONFIG_HIBERNATION=y
+CONFIG_PM_DEBUG=y
+CONFIG_PM_TRACE_RTC=y
+CONFIG_ACPI_DOCK=y
+CONFIG_ACPI_CONTAINER=y
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+CONFIG_CPU_FREQ_GOV_ONDEMAND=y
+CONFIG_X86_INTEL_PSTATE=y
+CONFIG_X86_ACPI_CPUFREQ=y
+CONFIG_PCIEPORTBUS=y
+CONFIG_PCI_MSI=y
+CONFIG_PCI_DEBUG=y
+CONFIG_HOTPLUG_PCI=y
+CONFIG_PCCARD=y
+CONFIG_YENTA=y
+CONFIG_BINFMT_MISC=y
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_XFRM_USER=y
+CONFIG_INET=y
+CONFIG_IP_MULTICAST=y
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IP_ROUTE_MULTIPATH=y
+CONFIG_IP_ROUTE_VERBOSE=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_IP_PNP_RARP=y
+CONFIG_IP_MROUTE=y
+CONFIG_IP_PIMSM_V1=y
+CONFIG_IP_PIMSM_V2=y
+CONFIG_SYN_COOKIES=y
+# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
+# CONFIG_INET_XFRM_MODE_TUNNEL is not set
+# CONFIG_INET_XFRM_MODE_BEET is not set
+# CONFIG_INET_DIAG is not set
+CONFIG_TCP_CONG_ADVANCED=y
+# CONFIG_TCP_CONG_BIC is not set
+# CONFIG_TCP_CONG_WESTWOOD is not set
+# CONFIG_TCP_CONG_HTCP is not set
+CONFIG_TCP_MD5SIG=y
+# CONFIG_IPV6 is not set
+CONFIG_NETWORK_SECMARK=y
+CONFIG_NET_SCHED=y
+CONFIG_NET_EMATCH=y
+CONFIG_NET_CLS_ACT=y
+CONFIG_DNS_RESOLVER=y
+# CONFIG_WIRELESS is not set
+CONFIG_NET_9P=y
+CONFIG_NET_9P_VIRTIO=y
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+CONFIG_DEBUG_DEVRES=y
+CONFIG_CONNECTOR=y
+# CONFIG_PNP_DEBUG_MESSAGES is not set
+CONFIG_BLK_DEV_LOOP=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_SCSI_SPI_ATTRS=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=y
+# CONFIG_ATA_VERBOSE_ERROR is not set
+CONFIG_SATA_AHCI=y
+CONFIG_ATA_PIIX=y
+CONFIG_PATA_AMD=y
+CONFIG_PATA_OLDPIIX=y
+CONFIG_PATA_SCH=y
+CONFIG_PATA_MPIIX=y
+CONFIG_ATA_GENERIC=y
+CONFIG_NETDEVICES=y
+CONFIG_NETCONSOLE=y
+CONFIG_VIRTIO_NET=y
+# CONFIG_ETHERNET is not set
+CONFIG_PHYLIB=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_POLLDEV=y
+CONFIG_INPUT_SPARSEKMAP=y
+CONFIG_INPUT_EVDEV=y
+CONFIG_INPUT_JOYSTICK=y
+CONFIG_INPUT_TABLET=y
+CONFIG_INPUT_TOUCHSCREEN=y
+CONFIG_INPUT_MISC=y
+# CONFIG_LEGACY_PTYS is not set
+CONFIG_SERIAL_NONSTANDARD=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=32
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_MANY_PORTS=y
+CONFIG_SERIAL_8250_SHARE_IRQ=y
+CONFIG_SERIAL_8250_DETECT_IRQ=y
+CONFIG_SERIAL_8250_RSA=y
+CONFIG_HW_RANDOM=y
+CONFIG_NVRAM=y
+CONFIG_HPET=y
+# CONFIG_HPET_MMAP is not set
+CONFIG_I2C_I801=y
+CONFIG_PTP_1588_CLOCK=y
+CONFIG_WATCHDOG=y
+CONFIG_AGP=y
+CONFIG_AGP_AMD64=y
+CONFIG_AGP_INTEL=y
+CONFIG_DRM=y
+CONFIG_DRM_I915=y
+CONFIG_FB_MODE_HELPERS=y
+CONFIG_FB_TILEBLITTING=y
+CONFIG_FB_EFI=y
+# CONFIG_LCD_CLASS_DEVICE is not set
+CONFIG_VGACON_SOFT_SCROLLBACK=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+CONFIG_HIDRAW=y
+CONFIG_HID_A4TECH=y
+CONFIG_HID_APPLE=y
+CONFIG_HID_BELKIN=y
+CONFIG_HID_CHERRY=y
+CONFIG_HID_CHICONY=y
+CONFIG_HID_CYPRESS=y
+CONFIG_HID_EZKEY=y
+CONFIG_HID_GYRATION=y
+CONFIG_HID_ITE=y
+CONFIG_HID_KENSINGTON=y
+CONFIG_HID_LOGITECH=y
+CONFIG_LOGITECH_FF=y
+CONFIG_HID_MICROSOFT=y
+CONFIG_HID_MONTEREY=y
+CONFIG_HID_PANTHERLORD=y
+CONFIG_PANTHERLORD_FF=y
+CONFIG_HID_PETALYNX=y
+CONFIG_HID_SAMSUNG=y
+CONFIG_HID_SUNPLUS=y
+CONFIG_HID_TOPSEED=y
+# CONFIG_USB_SUPPORT is not set
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_EDAC=y
+CONFIG_RTC_CLASS=y
+# CONFIG_RTC_HCTOSYS is not set
+CONFIG_DMADEVICES=y
+CONFIG_VIRTIO_PCI=y
+CONFIG_VIRTIO_MMIO=y
+CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
+# CONFIG_X86_PLATFORM_DEVICES is not set
+CONFIG_DAX=y
+CONFIG_EFI_VARS=y
+CONFIG_AUTOFS4_FS=y
+CONFIG_FSCACHE=y
+CONFIG_CACHEFILES=y
+CONFIG_ISO9660_FS=y
+CONFIG_JOLIET=y
+CONFIG_ZISOFS=y
+# CONFIG_PROC_VMCORE is not set
+CONFIG_TMPFS_POSIX_ACL=y
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_9P_FS=y
+CONFIG_9P_FSCACHE=y
+CONFIG_9P_FS_POSIX_ACL=y
+CONFIG_NLS_DEFAULT="utf8"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_ASCII=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_PRINTK_TIME=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_MAGIC_SYSRQ=y
+CONFIG_DEBUG_STACK_USAGE=y
+CONFIG_DEBUG_STACKOVERFLOW=y
+# CONFIG_SCHED_DEBUG is not set
+CONFIG_SCHEDSTATS=y
+CONFIG_RCU_TRACE=y
+CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
+CONFIG_EARLY_PRINTK_DBGP=y
+CONFIG_DEBUG_BOOT_PARAMS=y
+CONFIG_OPTIMIZE_INLINING=y
+CONFIG_KEYS=y
+CONFIG_SECURITY=y
+CONFIG_SECURITY_NETWORK=y
+CONFIG_CRYPTO_RSA=y
+CONFIG_CRYPTO_AUTHENC=y
+CONFIG_CRYPTO_CCM=y
+CONFIG_CRYPTO_GCM=y
+CONFIG_CRYPTO_ECHAINIV=y
+CONFIG_CRYPTO_CBC=y
+CONFIG_CRYPTO_CMAC=y
+CONFIG_CRYPTO_CRC32C=y
+CONFIG_CRYPTO_SHA1=y
+CONFIG_CRYPTO_AES_586=y
+CONFIG_CRYPTO_ARC4=y
+CONFIG_CRYPTO_DES=y
+CONFIG_ASYMMETRIC_KEY_TYPE=y
+CONFIG_ASYMMETRIC_PUBLIC_KEY_SUBTYPE=y
+CONFIG_X509_CERTIFICATE_PARSER=y
+CONFIG_PKCS7_MESSAGE_PARSER=y
+CONFIG_SYSTEM_TRUSTED_KEYRING=y
+# CONFIG_VIRTUALIZATION is not set
+CONFIG_CRC_CCITT=y
+CONFIG_CRC16=y
--- a/buildroot-v86/board/v86/post-image.sh
+++ b/buildroot-v86/board/v86/post-image.sh
@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Run after buildroot has built the image, and path to the built
+# output/image dir is passed as first arg.  We copy the built ISO
+# out of the container.
+cp ${BINARIES_DIR}/rootfs.iso9660 /build/v86-linux.iso
+echo "Created v86-linux.iso."
+
+# Prepare license info. Start with Seabios, then buildroot's
+wget https://raw.githubusercontent.com/coreboot/seabios/master/COPYING.LESSER \
+    -O ${BASE_DIR}/SeaBIOS_COPYING.LESSER
+tar czvf /build/licenses.tar.gz \
+    ${BASE_DIR}/SeaBIOS_COPYING.LESSER \
+    ${BASE_DIR}/legal-info/buildroot.config \
+    ${BASE_DIR}/legal-info/host-licenses \
+    ${BASE_DIR}/legal-info/licenses
+echo "Created licenses.tar.gz"
--- a/buildroot-v86/board/v86/rootfs_overlay/etc/fstab
+++ b/buildroot-v86/board/v86/rootfs_overlay/etc/fstab
@ -0,0 +1,10 @@
+# <file system>	<mount pt>	<type>	<options>	<dump>	<pass>
+/dev/root	/		ext2	rw,noauto	0	1
+proc		/proc		proc	defaults	0	0
+devpts		/dev/pts	devpts	defaults,gid=5,mode=620,ptmxmode=0666	0	0
+tmpfs		/dev/shm	tmpfs	mode=0777	0	0
+tmpfs		/tmp		tmpfs	mode=1777	0	0
+tmpfs		/run		tmpfs	mode=0755,nosuid,nodev	0	0
+sysfs		/sys		sysfs	defaults	0	0
+# Plan 9 Filer/IndexedDB browser filesystem on /mount
+host9p      /mnt        9p      trans=virtio,version=9p2000.L,rw        0   0
--- a/buildroot-v86/board/v86/rootfs_overlay/etc/inittab
+++ b/buildroot-v86/board/v86/rootfs_overlay/etc/inittab
@ -0,0 +1,40 @@
+# XXX: updated to add ttyS0 terminal and autologin.
+#
+# /etc/inittab
+#
+# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+#
+# Note: BusyBox init doesn't support runlevels.  The runlevels field is
+# completely ignored by BusyBox init. If you want runlevels, use
+# sysvinit.
+#
+# Format for each entry: <id>:<runlevels>:<action>:<process>
+#
+# id        == tty to run on, or empty for /dev/console
+# runlevels == ignored
+# action    == one of sysinit, respawn, askfirst, wait, and once
+# process   == program to run
+
+# Startup the system
+::sysinit:/bin/mount -t proc proc /proc
+::sysinit:/bin/mount -o remount,rw /
+::sysinit:/bin/mkdir -p /dev/pts
+::sysinit:/bin/mkdir -p /dev/shm
+::sysinit:/bin/mount -a
+::sysinit:/bin/hostname -F /etc/hostname
+# now run any rc scripts
+::sysinit:/etc/init.d/rcS
+
+# Put a getty on the serial port
+console::respawn:/sbin/getty -L  console 0 vt100 # GENERIC_SERIAL
+
+# Auto-login as root on ttyS0
+::respawn:/sbin/getty ttyS0 38400 xterm -n -l /bin/sh
+
+# Stuff to do for the 3-finger salute
+#::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+::shutdown:/etc/init.d/rcK
+::shutdown:/sbin/swapoff -a
+::shutdown:/bin/umount -a -r
--- a/buildroot-v86/build-v86.sh
+++ b/buildroot-v86/build-v86.sh
@ -0,0 +1,8 @@
+#!/bin/sh
+set -e
+
+# Build our v86 defconfig along with license files.
+echo $PWD
+make BR2_EXTERNAL=/buildroot-v86 v86_defconfig \
+    && make legal-info \
+    && make
--- a/buildroot-v86/configs/v86_defconfig
+++ b/buildroot-v86/configs/v86_defconfig
@ -0,0 +1,15 @@
+BR2_x86_pentiumpro=y
+BR2_CCACHE=y
+BR2_KERNEL_HEADERS_4_15=y
+BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_v86_PATH)/board/v86/rootfs_overlay/"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="$(BR2_EXTERNAL_v86_PATH)/board/v86/post-image.sh"
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_v86_PATH)/board/v86/linux.config"
+BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_TARGET_ROOTFS_ISO9660=y
+BR2_TARGET_SYSLINUX=y
+
+# If you want to add the nled editor, uncomment NLED + NCURSES
+#BR2_PACKAGE_NCURSES=y
+#BR2_PACKAGE_NLED=y
--- a/buildroot-v86/external.desc
+++ b/buildroot-v86/external.desc
@ -0,0 +1,2 @@
+name: v86
+desc: Customized image for running in browser with v86
--- a/buildroot-v86/external.mk
+++ b/buildroot-v86/external.mk
@ -0,0 +1 @@
+include $(sort $(wildcard $(BR2_EXTERNAL_v86_PATH)/package/*/*.mk))
--- a/buildroot-v86/package/nled/Config.in
+++ b/buildroot-v86/package/nled/Config.in
@ -0,0 +1,5 @@
+config BR2_PACKAGE_NLED
+	bool "nled"
+	select BR2_PACKAGE_NCURSES
+	help
+	  The Neat Little Editor (NLED) https://cdot.senecacollege.ca/software/nled/
--- a/buildroot-v86/package/nled/nled.hash
+++ b/buildroot-v86/package/nled/nled.hash
@ -0,0 +1 @@
+sha256 cf0f95edc8d399e883e38baf51f6a0cea9516761be36e75e8f14943667f7af29 nled_2_52_src.tgz
--- a/buildroot-v86/package/nled/nled.mk
+++ b/buildroot-v86/package/nled/nled.mk
@ -0,0 +1,36 @@
+################################################################################
+#
+# nled
+#
+################################################################################
+
+NLED_VERSION = 2.52
+NLED_SITE = https://cdot.senecacollege.ca/software/nled
+NLED_SOURCE = nled_2_52_src.tgz
+NLED_LICENSE = GPL-2.0+
+NLED_INSTALL_STAGING = YES
+NLED_DEPENDENCIES = ncurses
+
+# We need to override the C compiler used in the Makefile to 
+# use buildroot's cross-compiler instead of cc.  Switch cc to $(CC)
+# so we can override the variable via env vars.
+define NLED_MAKEFILE_FIXUP
+	$(SED) 's/cc $$(CCOPTIONS)/$$(CC) -static $$(CPPFLAGS) $$(CFLAGS) -c/g' $(@D)/Makefile
+	$(SED) 's/cc -o/$$(CC) $$(LDFLAGS) -o/g' $(@D)/Makefile
+endef
+
+NLED_PRE_BUILD_HOOKS += NLED_MAKEFILE_FIXUP
+
+define NLED_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) $(TARGET_CONFIGURE_OPTS) LDOPTIONS="-lncurses" LIBS="$(TARGET_CFLAGS) -lncurses"
+endef
+
+define NLED_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/nled $(TARGET_DIR)/usr/bin/nled
+endef
+
+define NLED_INSTALL_STAGING_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/nled $(STAGING_DIR)/usr/bin/nled
+endef
+
+$(eval $(generic-package))
				`@ -0,0 +1 @@`
				`source "$BR2_EXTERNAL_v86_PATH/package/nled/Config.in"`
				`@ -0,0 +1 @@`
				`include $(sort $(wildcard $(BR2_EXTERNAL_v86_PATH)/package//.mk))`
				`@ -0,0 +1 @@`
				`sha256 cf0f95edc8d399e883e38baf51f6a0cea9516761be36e75e8f14943667f7af29 nled_2_52_src.tgz`