Konstantin Belousov 35dfc644f5 Copy the fencing of the algorithm to do lock-less update and reading ... of the timehands, from the kern_tc.c implementation to vdso. Add comments giving hints where to look for the algorithm explanation. To compensate the removal of rmb() in userspace binuptime(), add explicit lfence instruction before rdtsc. On i386, add usual complications to detect SSE2 presence; assume that old CPUs which do not implement SSE2 also execute rdtsc almost in order. Reviewed by: alc, bde (previous version) Sponsored by: The FreeBSD Foundation MFC after: 2 weeks		2015-08-04 12:33:51 +00:00
..
gen	siglongjmp(): Preserve floating point exception flags on i386 and amd64.	2014-06-09 21:35:36 +00:00
stdlib
string	Replace the WEAK_ALIAS() alias with the WEAK_REFERENCE() alias. Use it and	2013-11-21 22:31:18 +00:00
sys	Copy the fencing of the algorithm to do lock-less update and reading	2015-08-04 12:33:51 +00:00
_fpmath.h
arith.h
gd_qnan.h
Makefile.inc	Replace use of ${.CURDIR} by ${LIBC_SRCTOP} and define ${LIBC_SRCTOP}	2014-03-04 02:19:39 +00:00
Symbol.map	libc/i386: Do not export .cerror.	2012-09-05 21:41:05 +00:00
SYS.h	Replace the WEAK_ALIAS() alias with the WEAK_REFERENCE() alias. Use it and	2013-11-21 22:31:18 +00:00