Function sys_prctl 

pub fn sys_prctl(_abi: &mut LinuxRiscv64Abi, trapframe: &mut Trapframe) -> usize

Linux prctl system call (syscall 167)

Operations on a process or thread. This is a stub implementation that returns success for common operations.

Arguments:

• arg0: option (PR_* operation)
• arg1-arg4: operation-specific arguments

Returns:

• 0 on success
• usize::MAX (Linux -1) for unsupported operations