Function sys_clock_gettime 

pub fn sys_clock_gettime(
    clock_id: u32,
    tp_ptr: u64,
) -> Result<u64, SyscallError>

SYS_CLOCK_GETTIME: Get current time for the specified clock.

Arguments

• clock_id - Clock identifier (CLOCK_MONOTONIC or CLOCK_REALTIME)
• tp_ptr - Pointer to userspace timespec structure to fill

Returns

• 0 on success
• -EINVAL if clock_id is invalid
• -EFAULT if tp_ptr is invalid

POSIX compatibility

This follows the POSIX signature: int clock_gettime(clockid_t clock_id, struct timespec *tp)