Start the emulator without graphics in command line environments

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Fix an error message when linking to initial root fs

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Introduce DDE for Linux 3.6

This patch is based on the related patches from dde36 branch of the master
repo. Refer to the branch for more information.

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Building support for DDE on amd64

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Align initcall sections by 8 bytes

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Prepare DDE during initialization

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>
Random debug stuffs

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>