diff options
Diffstat (limited to 'src/kernel')
| -rw-r--r-- | src/kernel/proc.h | 3 | ||||
| -rw-r--r-- | src/kernel/syscalls.c | 13 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/kernel/proc.h b/src/kernel/proc.h index bfe5cfc..5d95b52 100644 --- a/src/kernel/proc.h +++ b/src/kernel/proc.h @@ -98,6 +98,9 @@ struct Proc { size_t len; size_t pos; } execbuf; + + /* Time of the first _sys_time() call. 0 if not called yet. */ + uint64_t basetime; }; extern Proc *proc_cur; diff --git a/src/kernel/syscalls.c b/src/kernel/syscalls.c index a2e0e27..3350796 100644 --- a/src/kernel/syscalls.c +++ b/src/kernel/syscalls.c @@ -418,6 +418,18 @@ hid_t _sys_getprocfs(int flags) { SYSCALL_RETURN(hid); } +uint64_t _sys_time(int flags) { + if (flags != 0) { + SYSCALL_RETURN(-ENOSYS); + } + + uint64_t now = uptime_ns(); + if (proc_cur->basetime == 0) { + proc_cur->basetime = now; + } + SYSCALL_RETURN(now - proc_cur->basetime); +} + long _sys_execbuf(void __user *ubuf, size_t len) { if (len == 0) SYSCALL_RETURN(0); if (len > EXECBUF_MAX_LEN) @@ -473,6 +485,7 @@ long _syscall(long num, long a, long b, long c, long d, long e) { break; case _SYS_GETPPID: _sys_getppid(); break; case _SYS_WAIT2: _sys_wait2(a, b, (userptr_t)c); break; case _SYS_GETPROCFS: _sys_getprocfs(a); + break; case _SYS_TIME: _sys_time(a); break; case _SYS_EXECBUF: _sys_execbuf((userptr_t)a, b); break; case _SYS_DEBUG_KLOG: _sys_debug_klog((userptr_t)a, b); break; |