correct octal
tmp
can print ebp eip arguments
merge
coding style
print eip's file, line and function
add command to monitor K> xxx
add README file
 use printf(%.*s)
Merge branch 'lab1' into lab2
lab2 10%
 error in kern/pmap.c  line 480, go home
bug ! fuck! go home
Bug is in kern/pmap.c  boot_alloc() :
use ROUNDUP(n, PGSIZE), not ROUNDUP(nextfree, PGSIZE)
but who know why......
go to sleep
lab2 30%, at boot_map_region
cheat....
Merge branch 'lab2' into lab3