screenshot, vm to description, qemu debug non intrusive

README.md

@@ -1,6 +1,8 @@
 # Linux Kernel Module Cheat
 
-Run one command, get into QEMU Buildroot BusyBox with several minimal Linux kernel 4.9 module example tutorials with GDB and KGDB debug. Tested in x86 and ARM guests, Ubuntu 14.04 - 16.10 hosts.
+Run one command, get into QEMU Buildroot BusyBox virtual machine with several minimal Linux kernel 4.9 module example tutorials with GDB and KGDB debug. Tested in x86 and ARM guests, Ubuntu 14.04 - 16.10 hosts.
+
+![](screenshot.png)
 
 Usage:
 

run

@@ -39,7 +39,7 @@ env \
   make \
   BR2_JLEVEL="$(($(nproc) - 2))" \
   HOST_QEMU_OPTS="--enable-debug --enable-sdl --with-sdlabi=2.0" \
-  host-qemu-reconfigure \
+  host-qemu-rebuild \
   kernel_module-rebuild \
   all \
 ;

runqemu

@@ -5,6 +5,7 @@ set -e
 # CLI handling.
 arch=x86_64
 debug=false
+debug_qemu=''
 kgdb=false
 nographic=false
 extra_append=''
@@ -31,6 +32,9 @@ while getopts a:dkn OPT; do
       extra_flags="$extra_flags -nographic"
       nographic=true
       ;;
+    q)
+      debug_qemu='gdb -q -ex start --args'
+      ;;
   esac
 done
 shift "$(($OPTIND - 1))"
@@ -42,7 +46,7 @@ case "$arch" in
       if $kgdb; then
         extra_append="$extra_append kgdboc=ttyS0,115200"
       fi
-      cmd="gdb -q -ex start --args ./buildroot/output/host/usr/bin/qemu-system-x86_64 \
+      cmd="$debug_qemu ./buildroot/output/host/usr/bin/qemu-system-x86_64 \
         -M pc \
         -append 'root=/dev/vda $extra_append' \
         -drive file=${images_dir}/rootfs.ext2,if=virtio,format=raw \