Author: ed
Date: Sun Aug 21 07:41:11 2016
New Revision: 304555
URL: https://svnweb.freebsd.org/changeset/base/304555
Log:
Use memcpy() to copy 64-bit timestamps into the syscall return values.
On 32-bit platforms, our 64-bit timestamps need to be split up across
two registers. A simple assignment to td_retval[0] will cause the top 32
bits to get lost. By using memcpy(), we will automatically either use 1
or 2 registers depending on the size of register_t.
Modified:
head/sys/compat/cloudabi/cloudabi_clock.c
Modified: head/sys/compat/cloudabi/cloudabi_clock.c
==============================================================================
--- head/sys/compat/cloudabi/cloudabi_clock.c Sun Aug 21 07:28:38 2016
(r304554)
+++ head/sys/compat/cloudabi/cloudabi_clock.c Sun Aug 21 07:41:11 2016
(r304555)
@@ -117,7 +117,7 @@ cloudabi_sys_clock_res_get(struct thread
error = cloudabi_convert_timespec(&ts, &cts);
if (error != 0)
return (error);
- td->td_retval[0] = cts;
+ memcpy(td->td_retval, &cts, sizeof(cts));
return (0);
}
@@ -129,6 +129,6 @@ cloudabi_sys_clock_time_get(struct threa
int error;
error = cloudabi_clock_time_get(td, uap->clock_id, &ts);
- td->td_retval[0] = ts;
+ memcpy(td->td_retval, &ts, sizeof(ts));
return (error);
}
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