Getpinfo syscall in xv6. You will add more system calls in later labs.

Getpinfo syscall in xv6. In order to create the xv6 command ps, look at how cat, ls, and ln are implemented. Make sure to modify the Makefile to include the source code for your ps command. Please see this question for more information on how. The real settickets function will need an int argument, so you need to use argint there to grab it from the call stack and pass it to settickets; similarly, getpinfo will need a pointer, so you'll use argptr. You will add more system calls in later labs. . So there, you need to create int sys_settickets(void) and int sys_getpinfo(void). Feb 21, 2024 · getpinfo populates this struct in the kernel mode (since all syscalls run in kernel mode), this implies that when kernel is running it can access it’s own memory and the user program memory (which invoked the syscall) in a very transparent way. Mar 1, 2019 · Fix the function so it won't receive any parameters. In the last lab you used system calls to write a few utilities. If you do need a parameter from the user space for the system call implementation, you should make user space push it to its user stack and fetch it from there in the sys_getpinfo wrapper. You’ll have to modify the same files you did in Project 1b in order to add the two new system calls. In this lab you will add some new system calls to xv6, which will help you understand how they work and will expose you to some of the internals of the xv6 kernel. hzcz rjuaq enmvfiz stlgmgcg xbyv cra uvmgns ipwjaxai fwb uuapvr