working baseline local emulation target with busybox shell

Dockerfile

@@ -10,4 +10,8 @@ RUN apt update && \
         bison \
         libncurses-dev \
         bc \
-        libelf-dev
+        libelf-dev \
+        libarchive-tools \
+        libssl-dev \
+        fakeroot \
+        cpio

Makefile

@@ -1,11 +1,13 @@
 NAME := qos
-DEBUG := false
+DEBUG := true
 OUT_DIR := out
 KEY_DIR := keys
 TARGET := local
 CACHE_DIR := cache
 CONFIG_DIR := targets/$(TARGET)
+SCRIPTS_DIR := scripts
 CPUS := $(shell nproc)
+ARCH := x86_64
 
 include $(PWD)/config.env
 include $(PWD)/make/keys.mk
@@ -19,7 +21,7 @@ default: $(OUT_DIR)/bzImage
 $(CONFIG_DIR)/busybox.config:
 	$(toolchain) " \
 		cd /cache/busybox-$(BUSYBOX_VERSION) && \
-		make menuconfig && \
+		KCONFIG_NOTIMESTAMP=1 make menuconfig && \
 		cp .config /config/busybox.config; \
 	"
 
@@ -29,6 +31,34 @@ $(CONFIG_DIR)/linux.config:
 		make menuconfig && \
 		cp .config /config/linux.config; \
 	"
+
+$(OUT_DIR)/rootfs.cpio: $(OUT_DIR)/busybox
+	mkdir -p $(CACHE_DIR)/rootfs/bin
+ifdef DEBUG
+	cp $(OUT_DIR)/busybox $(CACHE_DIR)/rootfs/bin;
+	cp $(SCRIPTS_DIR)/busybox_init $(CACHE_DIR)/rootfs/init;
+	chmod +x $(CACHE_DIR)/rootfs/init;
+endif
+	$(toolchain) " \
+		cd /cache/rootfs \
+		&& find . \
+		| cpio -o -H newc \
+		| gzip -f - > /out/rootfs.cpio \
+	"
+
+# Currently broken determinism attempt
+#    $(toolchain) " \
+#    	cd /cache/rootfs \
+#    	&& mkdir -p dev \
+#    	&& fakeroot mknod -m 0622 dev/console c 5 1 \
+#    	&& find . -mindepth 1 -execdir touch -hcd "@0" "{}" + \
+#    	&& find . -mindepth 1 -printf '%P\0' \
+#    	| sort -z \
+#    	| LANG=C bsdtar --uid 0 --gid 0 --null -cnf - -T - \
+#    	| LANG=C bsdtar --null -cf - --format=newc @- \
+#    " > $@
+
+
 $(OUT_DIR)/busybox: extract
 	$(toolchain) " \
 		cd /cache/busybox-$(BUSYBOX_VERSION) && \
@@ -37,10 +67,19 @@ $(OUT_DIR)/busybox: extract
 		cp busybox /out/; \
 	"
 
-$(OUT_DIR)/bzImage: extract $(OUT_DIR)/busybox
+$(OUT_DIR)/bzImage: extract $(OUT_DIR)/rootfs.cpio
 	$(toolchain) " \
 		cd /cache/linux-$(LINUX_VERSION) && \
 		cp /config/linux.config .config && \
-		make -j$(CPUS) bzImage && \
+		make olddefconfig && \
+		make -j$(CPUS) ARCH=$(ARCH) bzImage && \
 		cp arch/x86_64/boot/bzImage /out/; \
 	"
+
+.PHONY: run
+run:
+	qemu-system-x86_64 \
+		-m 512M \
+		-nographic \
+		-initrd $(OUT_DIR)/rootfs.cpio \
+		-kernel $(OUT_DIR)/bzImage

make/toolchain.mk

@@ -1,6 +1,6 @@
 .PHONY: toolchain-shell
 build-shell: toolchain
-	docker run -it local/$(NAME)-build bash
+	$(toolchain)
 
 .PHONY: toolchain
 toolchain:

scripts/busybox_init

@@ -0,0 +1,35 @@
+#!/bin/busybox sh
+
+echo "booted"
+
+/bin/busybox --install
+
+function halt {
+   echo "Something failed: $1"
+   echo "Will reboot in 10 seconds"
+   umount /eos
+   umount /main
+   umount /boot
+   umount /extra
+   sleep 10
+   reboot -f
+}
+
+/usr/bin/busybox --install
+
+mount -t proc none /proc
+mount -t devtmpfs none /dev
+mount -t sysfs none /sys
+mount -t securityfs none /sys/kernel/security
+mkdir /dev/pts
+mount -t devpts none /dev/pts
+
+echo -n 3 > /proc/sys/kernel/yama/ptrace_scope
+
+echo -n 2 > /proc/sys/kernel/kptr_restrict
+
+touch /etc/hosts
+touch /etc/fstab
+
+
+/bin/busybox sh

targets/local/busybox.config

@@ -1,14 +1,13 @@
 #
 # Automatically generated make config: don't edit
 # Busybox version: 1.33.2
-# Fri Jun 24 04:18:01 2022
 #
 CONFIG_HAVE_DOT_CONFIG=y
 
 #
 # Settings
 #
-CONFIG_DESKTOP=y
+# CONFIG_DESKTOP is not set
 # CONFIG_EXTRA_COMPAT is not set
 # CONFIG_FEDORA_COMPAT is not set
 CONFIG_INCLUDE_SUSv2=y
@@ -40,7 +39,7 @@ CONFIG_FEATURE_SYSLOG=y
 #
 # Build Options
 #
-# CONFIG_STATIC is not set
+CONFIG_STATIC=y
 # CONFIG_PIE is not set
 # CONFIG_NOMMU is not set
 # CONFIG_BUILD_LIBBUSYBOX is not set
@@ -189,9 +188,9 @@ CONFIG_FEATURE_TAR_NOPRESERVE_TIME=y
 # CONFIG_FEATURE_TAR_SELINUX is not set
 CONFIG_UNZIP=y
 CONFIG_FEATURE_UNZIP_CDF=y
-CONFIG_FEATURE_UNZIP_BZIP2=y
+# CONFIG_FEATURE_UNZIP_BZIP2 is not set
-CONFIG_FEATURE_UNZIP_LZMA=y
+# CONFIG_FEATURE_UNZIP_LZMA is not set
-CONFIG_FEATURE_UNZIP_XZ=y
+# CONFIG_FEATURE_UNZIP_XZ is not set
 # CONFIG_FEATURE_LZMA_FAST is not set
 
 #
@@ -1047,11 +1046,11 @@ CONFIG_PMAP=y
 CONFIG_POWERTOP=y
 CONFIG_FEATURE_POWERTOP_INTERACTIVE=y
 CONFIG_PS=y
-# CONFIG_FEATURE_PS_WIDE is not set
+CONFIG_FEATURE_PS_WIDE=y
-# CONFIG_FEATURE_PS_LONG is not set
+CONFIG_FEATURE_PS_LONG=y
-CONFIG_FEATURE_PS_TIME=y
+# CONFIG_FEATURE_PS_TIME is not set
 # CONFIG_FEATURE_PS_UNUSUAL_SYSTEMS is not set
-CONFIG_FEATURE_PS_ADDITIONAL_COLUMNS=y
+# CONFIG_FEATURE_PS_ADDITIONAL_COLUMNS is not set
 CONFIG_PSTREE=y
 CONFIG_PWDX=y
 CONFIG_SMEMCAP=y