operating system kernel experiment 2

System call part

source code

The main positions of the code are kernel/system_call.s, kernel/Makefile, include/linux/sys.h, include/unistd.h,

main operation

Modify kernel/Makefile, add who.o to the link parameters,

Modify the nr_system_calls of kernel/system_call.s , modify the number of system call.

Added _NR_whoami definition to include/unistd.h.

Added the sys_whoami function pointer to the end of the sys_call_table array in include/linux/sys.h.