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1. ×¼±¸ºÃÒ»¸örootfsµÄimgÎļþ
UMLÐèÒªÖ¸¶¨Ò»¸ö°üº¬ÍêÕû¸ùÎļþϵͳµÄimgÎļþ¡£Ê×ÏÈ´´½¨Ò»¸ö´óСΪ2GµÄimgÎļþ£¬È»ºó½«Æä¸ñʽ»¯Îªext3Îļþϵͳ¡£
# cd ~/uml
# dd if=/dev/zero of=rootfs.img bs=1M count=2048
# mkfs.ext3 rootfs.img
rootfs.imgʵ¼ÊÉÏÊÇÒ»¸öext3ÎļþϵͳµÄ´æ´¢É豸£¬µ«ÊÇ»¹Ã»ÓÐʲôÄÚÈÝ¡£ËùÒÔÏÖÔÚÒª×öµÄÊÇ£¬½«Ò»¸öÒÑÓеĸùÎļþϵͳ¿½±´µ½rootfs.imgÖУ¨¼ÙÉèÕâ¸ö¸ùÎļþÒѾ´ò°üΪyour-rootfs.tar.gz£©£º
# mkdir uml-rootfs
# sudo mount -o loop rootfs.img uml-rootfs
# cd uml-rootfs
# tar xf your-rootfs.tar.gz
# cd ..
# umount uml-rootfs
»¹ÓÐÒ»ÖÖ°ì·¨ÖÆ×÷Ò»¸örootÎļþϵͳµÄimgÎļþ£¬¼ÙÉèÄã×Ô¼ºµÄlinux·¢Ðа棨Fedora, Ubuntu£¬etc£©ÊÇ°´ÕÕÔÚ/dev/sda5É豸ÉÏ£¬Äã¿ÉÒÔ½«Õû¸ö/dev/sda5¿½±´µ½Ò»¸öµ¥¶ÀµÄimgÎļþ£º
dd if=/dev/sda5 of=rootfs.img bs=1M count=2048
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2. ÒÔUMģʽ±àÒëlinuxÄÚºË
´Ókernel.orgÉÏÏÂÔØÒ»¸öÎȶ¨µÄkernel°æ±¾£¬È»ºóÒÔumģʽÖØбàÒ룺
# cd kernel-2.32.26.y
# make mrproper ARCH=um
# make defconfig ARCH=um
# make ARCH=um
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3. ÔËÐÐUML
# ./linux mem=512M ubda=~/uml/rootfs.img
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