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only fallback to gettimeofday/settimeofday syscalls if they exist

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riscv32 and future architectures only provide the clock_ functions.
This commit is contained in:
Stefan O'Rear 2020-09-03 03:33:10 -04:00 • committed by Rich Felker
parent 41149ea8c7
commit 12a757b321
1 changed files with 4 additions and 0 deletions
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4
src/time/clock_gettime.c
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@ -80,10 +80,12 @@ int __clock_gettime(clockid_t clk, struct timespec *ts)
return __syscall_ret(r);
long ts32[2];
r = __syscall(SYS_clock_gettime, clk, ts32);
#ifdef SYS_gettimeofday
if (r==-ENOSYS && clk==CLOCK_REALTIME) {
r = __syscall(SYS_gettimeofday, ts32, 0);
ts32[1] *= 1000;
}
#endif
if (!r) {
ts->tv_sec = ts32[0];
ts->tv_nsec = ts32[1];
@ -92,6 +94,7 @@ int __clock_gettime(clockid_t clk, struct timespec *ts)
return __syscall_ret(r);
#else
r = __syscall(SYS_clock_gettime, clk, ts);
#ifdef SYS_gettimeofday
if (r == -ENOSYS) {
if (clk == CLOCK_REALTIME) {
__syscall(SYS_gettimeofday, ts, 0);
@ -100,6 +103,7 @@ int __clock_gettime(clockid_t clk, struct timespec *ts)
}
r = -EINVAL;
}
#endif
return __syscall_ret(r);
#endif
}