On branch llh_kernel-1.4
Changes to be committed:
	modified:   Makefile
	modified:   README.md
	modified:   kernel/include/loongarch.h
	modified:   kernel/include/loongarchregs.h
	modified:   kernel/include/memlayout.h
	modified:   kernel/include/sysnum.h
	modified:   kernel/kalloc.c
	modified:   kernel/main.c
	modified:   kernel/proc.c
	new file:   kernel/target/kernel
	new file:   kernel/target/kernel.asm
	new file:   kernel/target/kernel.bin
	new file:   kernel/target/kernel.sym
	modified:   kernel/trap.c
	modified:   kernel/uservec.S
	modified:   kernel/vm.c
	new file:   user/busybox_test.c
	modified:   user/cat.c
	modified:   user/echo.c
	new file:   user/find.c
	modified:   user/forktest.c
	new file:   user/grading_init.c
	modified:   user/grep.c
	modified:   user/grind.c
	new file:   user/init-for-test.S
	modified:   user/init.c
	modified:   user/initcode.S
	modified:   user/kill.c
	modified:   user/ln.c
	modified:   user/ls.c
	modified:   user/mkdir.c
	new file:   user/modify_file_name.sh
	new file:   user/mv.c
	new file:   user/myDup3.c
	modified:   user/printf.c
	modified:   user/rm.c
	modified:   user/sh.c
	new file:   user/sleep.c
	new file:   user/strace.c
	modified:   user/stressfs.c
	new file:   user/test.c
	deleted:    user/ulib.c
	deleted:    user/umalloc.c
	modified:   user/user.h
	modified:   user/usertests.c
	modified:   user/usys.pl
	modified:   user/wc.c
	new file:   user/xargs.c
	new file:   user/xargstest.sh
	new file:   user/xv6-riscv-license
	modified:   user/zombie.c
	new file:   user2/cat.c
	new file:   user2/echo.c
	new file:   user2/forktest.c
	new file:   user2/grep.c
	new file:   user2/grind.c
	new file:   user2/init.c
	new file:   user2/initcode
	new file:   user2/initcode.S
	new file:   user2/initcode.out
	new file:   user2/kill.c
	new file:   user2/ln.c
	new file:   user2/ls.c
	new file:   user2/mkdir.c
	new file:   user2/printf.c
	new file:   user2/rm.c
	new file:   user2/sh.c
	new file:   user2/stressfs.c
	renamed:    user/user copy.h -> user2/user copy.h
	new file:   user2/user.h
	new file:   user2/usertests.c
	new file:   user2/usys.pl
	new file:   user2/wc.c
	new file:   user2/zombie.c