Function sys_kill

os/src/syscall/process.rs:106–117

(pid: usize, signal: u32)

}

pub fn sys_kill(pid: usize, signal: u32) -> isize {
    if let Some(process) = pid2process(pid) {
        if let Some(flag) = SignalFlags::from_bits(signal) {
            process.inner_exclusive_access().signals |= flag;
            0
        } else {
            -1
        }
    } else {
        -1
    }
}