libc: Implement gettimeofday() and instantly mark it as deprecated

libs/libc/include/bits/macros.h

@@ -7,5 +7,6 @@
 #define __lc_is_deprecated __attribute__((deprecated))
 #define __lc_unreachable __builtin_unreachable
 #define __lc_used __attribute__((used))
+#define __lc_unused __attribute__((unused))
 
 #endif

libs/libc/include/sys/time.h

@@ -0,0 +1,26 @@
+#ifndef _SYS_TIME_H
+#define _SYS_TIME_H
+
+#include <bits/macros.h>
+#include <sys/types.h>
+
+// Captures elapsed time with microsecond precision.
+struct timeval
+{
+    time_t tv_sec;
+    suseconds_t tv_usec;
+};
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /* Retrieves the current time and stores it in tp. */
+    __lc_is_deprecated int gettimeofday(struct timeval* tp, void* tzp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libs/libc/include/time.h

@@ -2,6 +2,7 @@
 #define _TIME_H
 
 #include <stddef.h>
+#include <sys/time.h>
 #include <sys/types.h>
 
 // Structure representing broken-down time.
@@ -18,13 +19,6 @@ struct tm
     int tm_isdst;
 };
 
-// Captures elapsed time with microsecond precision.
-struct timeval
-{
-    time_t tv_sec;
-    suseconds_t tv_usec;
-};
-
 // Captures elapsed time with nanosecond precision.
 struct timespec
 {

libs/libc/src/time.cpp

@@ -110,6 +110,15 @@ extern "C"
         return (int)__lc_fast_syscall2(SYS_clock_gettime, clock_id, tp);
     }
 
+    int gettimeofday(struct timeval* tp, __lc_unused void* tzp)
+    {
+        struct timespec tspec;
+        clock_gettime(CLOCK_REALTIME, &tspec);
+        tp->tv_sec = tspec.tv_sec;
+        tp->tv_usec = tspec.tv_nsec / 1000;
+        return 0;
+    }
+
     struct tm* localtime(const time_t* time)
     {
         static struct tm result;