added Ubuntu

tools/docker/ubuntu/Dockerfile

@@ -0,0 +1,53 @@
+FROM ubuntu:16.04 as ubuntu-blockchain
+LABEL maintainer="Kris Henriksen"
+
+ENV DEBIAN_FRONTEND noninteractive
+
+RUN apt update && \
+	apt --yes --no-install-recommends install \
+		linux-image-virtual \
+		grub2 \
+		systemd \
+		initramfs-tools \
+		net-tools \
+		iputils-ping \
+	&& \
+    chsh -s /bin/bash && \
+    echo "root:root" | chpasswd && \
+    mkdir -p /etc/systemd/system/serial-getty@ttyS0.service.d/ && \
+    systemctl enable serial-getty@ttyS0.service && \
+    rm /lib/systemd/system/getty.target.wants/getty-static.service && \
+    rm /etc/issue && \
+	chmod -x /etc/update-motd.d/* && \
+	systemctl disable apt-daily-upgrade.timer && \
+	systemctl mask apt-daily-upgrade.service && \
+	systemctl disable apt-daily.timer && \
+	systemctl mask apt-daily.service && \
+    systemctl disable systemd-timesyncd.service && \
+	systemctl mask systemd-timesyncd.service && \
+	systemctl disable motd-news.timer && \
+	systemctl mask motd-news.timer && \
+    echo "tmpfs /tmp tmpfs nodev,nosuid 0 0" >> /etc/fstab
+
+COPY getty-noclear.conf getty-override.conf /etc/systemd/system/getty@tty1.service.d/
+COPY getty-autologin-serial.conf /etc/systemd/system/serial-getty@ttyS0.service.d/
+COPY logind.conf /etc/systemd/
+COPY boot-9p /etc/initramfs-tools/scripts/
+COPY grub /etc/default/
+
+COPY networking.sh /root/
+
+# this needs to be commented out in order to boot from hdd
+RUN printf '%s\n' 9p 9pnet 9pnet_virtio virtio virtio_ring virtio_pci | tee -a /etc/initramfs-tools/modules && \
+    echo 'BOOT=boot-9p' | tee -a /etc/initramfs-tools/initramfs.conf && \
+    update-initramfs -u
+
+# ReducingDiskFootprint
+RUN apt-get remove --purge perl && \
+	apt-get autoremove --purge
+RUN apt-get --yes clean && \
+    rm -r /var/lib/apt/lists/* && \
+    rm -r /usr/share/doc/* && \
+    rm -r /usr/share/man/* && \
+    rm -r /usr/share/locale/?? && \	
+    rm /var/log/*.log /var/log/lastlog /var/log/wtmp /var/log/apt/*.log

tools/docker/ubuntu/README.md

@@ -0,0 +1,5 @@
+You can build a Linux image for use with v86:
+
+1. Run `./build-container.sh` to build the Docker container and v86 images (requires dockerd)
+2. Run `./build-state.js` to build a state image in order to skip the boot process
+3. Optionally, compress the `ubuntu-state-base.bin` file using zstd (v86 automatically detects the zstd magic and decompresses on the fly)

tools/docker/ubuntu/boot-9p

@@ -0,0 +1,33 @@
+# 9p filesystem mounting            -*- shell-script -*-
+
+mountroot()
+{
+    wait_for_udev 10
+
+    if [ ${readonly} = y ]; then
+        roflag="-o ro"
+    else
+        roflag="-o rw"
+    fi
+
+    #echo "Running: mount -t 9p -o cache=mmap ${ROOT} ${rootmnt}"
+    #mount -t 9p -o cache=mmap ${ROOT} ${rootmnt}
+    echo "Running: mount -t 9p -o cache=fscache ${ROOT} ${rootmnt}"
+    mount -t 9p -o cache=fscache ${ROOT} ${rootmnt}
+    echo "mount finished with code $?"
+}
+
+mount_top()
+{
+    echo top
+}
+
+mount_premount()
+{
+    echo premount
+}
+
+mount_bottom()
+{
+    echo bottom
+}

tools/docker/ubuntu/build-container.sh

@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+set -veu
+
+IMAGES="$(dirname "$0")"/../../../images
+OUT_ROOTFS_TAR="$IMAGES"/ubuntu-9p-rootfs.tar
+OUT_ROOTFS_FLAT="$IMAGES"/ubuntu-9p-rootfs-flat
+OUT_FSJSON="$IMAGES"/ubuntu-base-fs.json
+CONTAINER_NAME=ubuntu-full
+IMAGE_NAME=i386/ubuntu-full
+
+mkdir -p "$IMAGES"
+docker build . --platform linux/386 --rm --tag "$IMAGE_NAME"
+docker rm "$CONTAINER_NAME" || true
+docker create --platform linux/386 -t -i --name "$CONTAINER_NAME" "$IMAGE_NAME" bash
+
+docker export "$CONTAINER_NAME" > "$OUT_ROOTFS_TAR"
+
+"$(dirname "$0")"/../../../tools/fs2json.py --out "$OUT_FSJSON" "$OUT_ROOTFS_TAR"
+
+# Note: Not deleting old files here
+mkdir -p "$OUT_ROOTFS_FLAT"
+"$(dirname "$0")"/../../../tools/copy-to-sha256.py "$OUT_ROOTFS_TAR" "$OUT_ROOTFS_FLAT"
+
+echo "$OUT_ROOTFS_TAR", "$OUT_ROOTFS_FLAT" and "$OUT_FSJSON" created.

tools/docker/ubuntu/build-state.js

@@ -0,0 +1,104 @@
+#!/usr/bin/env node
+"use strict";
+
+const path = require("path");
+
+var fs = require("fs");
+var V86 = require("./../../../build/libv86.js").V86;
+
+const V86_ROOT = path.join(__dirname, "../../..");
+
+var OUTPUT_FILE = path.join(V86_ROOT, "images/ubuntu-state-base.bin");
+
+process.stdin.setRawMode(true);
+process.stdin.resume();
+process.stdin.setEncoding("utf8");
+process.stdin.on("data", handle_key);
+
+var emulator = new V86({
+    bios: { url: path.join(V86_ROOT, "/bios/seabios.bin") },
+    autostart: true,
+	disable_speaker: true,
+    memory_size: 128 * 1024 * 1024,
+    vga_memory_size: 0,
+    bzimage_initrd_from_filesystem: true,
+	cmdline: [
+		'rw',
+		'init=/bin/systemd',
+		'root=host9p',
+		'rootfstype=9p',
+		'rootflags=trans=virtio,cache=loose',
+		'console=ttyS0,115200',
+		'tsc=reliable',
+		'mitigations=off',
+		'spectre_v2=off',
+		'pti=off',
+		'random.trust_cpu=on',
+		'maxcpus=0',
+		'selinux=0',
+		'audit=0',
+		'nowatchdog',
+		'mem=128M'
+	].join(' '),
+    filesystem: {
+        basefs: {
+            url: path.join(V86_ROOT, "/images/ubuntu-base-fs.json"),
+        },
+        baseurl: path.join(V86_ROOT, "/images/ubuntu-9p-rootfs-flat/"),
+    },
+    screen_dummy: true,
+	network_relay_url: "<UNUSED>"
+});
+
+console.log("Now booting, please stand by ...");
+
+var boot_start = Date.now();
+var serial_text = "";
+let booted = false;
+
+emulator.add_listener("serial0-output-char", function(c)
+{
+    process.stdout.write(c);
+
+    serial_text += c;
+
+    if(!booted && serial_text.endsWith("root@localhost:~# "))
+    {
+        console.error("\nBooted in %d", (Date.now() - boot_start) / 1000);
+        booted = true;
+
+        // sync and drop caches: Makes it safer to change the filesystem as fewer files are rendered
+        emulator.serial0_send("sync;echo 3 >/proc/sys/vm/drop_caches\n");
+
+        setTimeout(async function ()
+		{
+			const s = await emulator.save_state();
+
+			fs.writeFile(OUTPUT_FILE, new Uint8Array(s), function(e)
+				{
+					if(e) throw e;
+					console.error("Saved as " + OUTPUT_FILE);
+					stop();
+				});
+		}, 10 * 1000);
+    }
+});
+
+function handle_key(c)
+{
+    if(c === "\u0003")
+    {
+        // ctrl c
+        stop();
+    }
+    else
+    {
+        emulator.serial0_send(c);
+    }
+}
+
+function stop()
+{
+    emulator.stop();
+    process.stdin.pause();
+}

tools/docker/ubuntu/build.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+./build-container.sh
+./build-state.js
+
+# compress blockstate
+zstd --ultra -22 -f ../../../images/images/ubuntu-state-base.bin
+
+# compress 9p filesystem
+#zstd --ultra -22 -r -f ../../../images/ubuntu-9p-rootfs-flat/
+#rm -rf ../../../images/ubuntu-9p-rootfs-flat/*.bin

tools/docker/ubuntu/getty-autologin-serial.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --autologin root --noissue --noclear -s %I 115200,38400,9600 vt102

tools/docker/ubuntu/getty-noclear.conf

@@ -0,0 +1,2 @@
+[Service]
+TTYVTDisallocate=no

tools/docker/ubuntu/getty-override.conf

@@ -0,0 +1,3 @@
+[Service]
+ExecStart=
+ExecStart=-/sbin/agetty --autologin root --noissue --noclear %I 38400 $TERM

tools/docker/ubuntu/grub

@@ -0,0 +1,9 @@
+GRUB_DEFAULT=0
+GRUB_HIDDEN_TIMEOUT=0
+GRUB_HIDDEN_TIMEOUT_QUIET=true
+GRUB_TIMEOUT=10
+GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
+GRUB_CMDLINE_LINUX_DEFAULT="quiet splash console=ttyS0,115000 ipv6.disable=1"
+GRUB_CMDLINE_LINUX="ipv6.disable=1"
+GRUB_TERMINAL=console
+GRUB_DISABLE_RECOVERY="true"

tools/docker/ubuntu/logind.conf

@@ -0,0 +1,37 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# Entries in this file show the compile time defaults.
+# You can change settings by editing this file.
+# Defaults can be restored by simply deleting this file.
+#
+# See logind.conf(5) for details.
+
+[Login]
+NAutoVTs=0
+ReserveVT=0
+#KillUserProcesses=no
+#KillOnlyUsers=
+#KillExcludeUsers=root
+#InhibitDelayMaxSec=5
+#HandlePowerKey=poweroff
+#HandleSuspendKey=suspend
+#HandleHibernateKey=hibernate
+#HandleLidSwitch=suspend
+#HandleLidSwitchDocked=ignore
+#PowerKeyIgnoreInhibited=no
+#SuspendKeyIgnoreInhibited=no
+#HibernateKeyIgnoreInhibited=no
+#LidSwitchIgnoreInhibited=yes
+#HoldoffTimeoutSec=30s
+#IdleAction=ignore
+#IdleActionSec=30min
+#RuntimeDirectorySize=10%
+#RemoveIPC=yes
+#InhibitorsMax=8192
+#SessionsMax=8192
+#UserTasksMax=33%

tools/docker/ubuntu/networking.sh

@@ -0,0 +1,4 @@
+rmmod ne2k-pci && modprobe ne2k-pci
+ifconfig enp0s5 192.168.1.5 netmask 255.255.255.0 up
+route add default gw 192.168.1.1
+echo "nameserver 8.8.8.8" > /etc/resolv.conf