Add gettimeofday and clock_gettime

services/libs/jinux-std/src/syscall/clock_gettime.rs

@@ -0,0 +1,34 @@
+use super::SyscallReturn;
+use super::SYS_CLOCK_GETTIME;
+use crate::{
+    log_syscall_entry,
+    prelude::*,
+    time::{clockid_t, timespec_t, ClockID, SystemTime},
+    util::write_val_to_user,
+};
+
+pub fn sys_clock_gettime(clockid: clockid_t, timespec_addr: Vaddr) -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_CLOCK_GETTIME);
+    let clock_id = ClockID::try_from(clockid)?;
+    debug!("clockid = {:?}", clock_id);
+
+    let now = SystemTime::now();
+    let time_duration = match clock_id {
+        ClockID::CLOCK_REALTIME | ClockID::CLOCK_REALTIME_COARSE => {
+            now.duration_since(&SystemTime::UNIX_EPOCH)?
+        }
+        // TODO: Respect other type of clock_id
+        _ => {
+            warn!(
+                "unsupported clock_id: {:?}, treat it as CLOCK_REALTIME",
+                clock_id
+            );
+            now.duration_since(&SystemTime::UNIX_EPOCH)?
+        }
+    };
+
+    let timespec = timespec_t::from(time_duration);
+    write_val_to_user(timespec_addr, &timespec)?;
+
+    Ok(SyscallReturn::Return(0))
+}