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tools/nolibc: fall back to sys_clock_gettime() in gettimeofday() 

Newer architectures (like riscv32) do not implement sys_gettimeofday().
In those cases fall back to sys_clock_gettime().
While that does not support the timezone argument of sys_gettimeofday(),
specifying this argument invokes undefined behaviour, so it's safe to ignore.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250428-nolibc-misc-v2-14-3c043eeab06c@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Thomas Weißschuh 2025-04-28 14:40:15 +02:00 committed by Thomas Weißschuh
parent a009a0c6fa
commit 5e7392dc82
1 changed files with 14 additions and 1 deletions
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15
tools/include/nolibc/sys/time.h
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@ -13,6 +13,8 @@
#include "../arch.h"
#include "../sys.h"
static int sys_clock_gettime(clockid_t clockid, struct timespec *tp);
/*
* int gettimeofday(struct timeval *tv, struct timezone *tz);
*/
@ -23,7 +25,18 @@ int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
#ifdef __NR_gettimeofday
return my_syscall2(__NR_gettimeofday, tv, tz);
#else
return __nolibc_enosys(__func__, tv, tz);
(void) tz; /* Non-NULL tz is undefined behaviour */
struct timespec tp;
int ret;
ret = sys_clock_gettime(CLOCK_REALTIME, &tp);
if (!ret && tv) {
tv->tv_sec = tp.tv_sec;
tv->tv_usec = tp.tv_nsec / 1000;
}
return ret;
#endif
}