From 7057069e6e6171b217717329e494ea63a82e48e9 Mon Sep 17 00:00:00 2001
From: lns <matzeton@googlemail.com>
Date: Sat, 25 Aug 2018 01:51:34 +0200
Subject: make oldconfig [+] make qemu [+] basic /init script

Signed-off-by: lns <matzeton@googlemail.com>
---
 Makefile            | 12 ++++++++++--
 scripts/init.rootfs | 23 +++++++++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 scripts/init.rootfs

diff --git a/Makefile b/Makefile
index 9479f19..5480969 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ BUSYBOX_DL_URL=$(BUSYBOX_DL_PREFIX)/$(BUSYBOX_DL_BASENAME)-$(BUSYBOX_DL_VERSION)
 BUSYBOX_DL_FILE=$(DL_DIR)/$(BUSYBOX_DL_BASENAME)-$(BUSYBOX_DL_VERSION).$(BUSYBOX_DL_SUFFIX)
 BUSYBOX_BUILD_DIR=$(BUILD_DIR)/$(BUSYBOX_DL_BASENAME)-$(BUSYBOX_DL_VERSION)
 
-all: pre dl extract build
+all: pre dl extract build image
 
 $(DL_DIR):
 	mkdir -p '$@'
@@ -71,7 +71,8 @@ extract: dl $(LINUX_BUILD_DIR)/Makefile $(MUSL_BUILD_DIR)/Makefile $(BUSYBOX_BUI
 
 $(LINUX_BUILD_DIR)/vmlinux:
 	cp -v '$(CFG_DIR)/linux.config' '$(LINUX_BUILD_DIR)/.config'
-	make -C '$(LINUX_BUILD_DIR)' -j$(BUILDJOBS) ARCH=$(shell uname -m)
+	make -C '$(LINUX_BUILD_DIR)' oldconfig
+	make -C '$(LINUX_BUILD_DIR)' -j$(BUILDJOBS) ARCH=$(shell uname -m) bzImage
 	make -C '$(LINUX_BUILD_DIR)' -j$(BUILDJOBS) ARCH='$(shell uname -m)' INSTALL_HDR_PATH='$(ROOTFS_DIR)/usr' headers_install
 
 $(MUSL_BUILD_DIR)/lib/libc.so:
@@ -85,7 +86,14 @@ $(BUSYBOX_BUILD_DIR)/busybox:
 	sed -i 's|^.*\(CONFIG_PREFIX\).*|\1="$(ROOTFS_DIR)"|g' '$(BUSYBOX_BUILD_DIR)/.config'
 	sed -i 's|^.*\(CONFIG_EXTRA_CFLAGS\).*|\1="-I$(ROOTFS_DIR)/usr/include -nostdinc -Wno-parentheses -Wno-strict-prototypes -Wno-undef"|g' '$(BUSYBOX_BUILD_DIR)/.config'
 	sed -i 's|^.*\(CONFIG_EXTRA_LDFLAGS\).*|\1="-L$(ROOTFS_DIR)/usr/lib -dynamic-linker=$(ROOTFS_DIR)/lib/ld-musl-$(shell uname -m).so.1 -nostdlib"|g' '$(BUSYBOX_BUILD_DIR)/.config'
+	make -C '$(BUSYBOX_BUILD_DIR)' oldconfig
 	make -C '$(BUSYBOX_BUILD_DIR)' -j$(BUILDJOBS) ARCH=$(shell uname -m) V=1 all
 	make -C '$(BUSYBOX_BUILD_DIR)' -j$(BUILDJOBS) ARCH=$(shell uname -m) install
 
 build: extract $(LINUX_BUILD_DIR)/vmlinux $(MUSL_BUILD_DIR)/lib/libc.so $(BUSYBOX_BUILD_DIR)/busybox
+
+image: build
+	cd '$(ROOTFS_DIR)' && find . -print0 | cpio --null -ov --format=newc | gzip -9 > '$(THIS_DIR)/initramfs.cpio.gz'
+
+qemu:
+	qemu-system-x86_64 -kernel '$(LINUX_BUILD_DIR)/arch/x86_64/boot/bzImage' -initrd '$(THIS_DIR)/initramfs.cpio.gz' -nographic -append "console=ttyAMA0" -enable-kvm -D ./qemu.log
diff --git a/scripts/init.rootfs b/scripts/init.rootfs
new file mode 100644
index 0000000..460866b
--- /dev/null
+++ b/scripts/init.rootfs
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+mkdir -p /proc /sys
+mount -t proc none /proc
+mount -t sysfs none /sys
+
+cat <<!
+
+
+Boot took $(cut -d' ' -f1 /proc/uptime) seconds
+
+        _       _     __ _                  
+  /\/\ (_)_ __ (_)   / /(_)_ __  _   ___  __
+ /    \| | '_ \| |  / / | | '_ \| | | \ \/ /
+/ /\/\ \ | | | | | / /__| | | | | |_| |>  < 
+\/    \/_|_| |_|_| \____/_|_| |_|\__,_/_/\_\ 
+
+
+Welcome to mini_linux
+
+
+!
+exec /bin/sh
-- 
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