Reduce the size of the interposing table and amount of

cancellation-handling code in the libthr.  Translate some syscalls
into their more generic counterpart, and remove translated syscalls
from the table.

List of the affected syscalls:
creat, open -> openat
raise -> thr_kill
sleep, usleep -> nanosleep
pause -> sigsuspend
wait, wait3, waitpid -> wait4

Suggested and reviewed by:	jilles (previous version)
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week

1 files changed, 5 insertions, 13 deletions

diff --git a/lib/libc/gen/usleep.c b/lib/libc/gen/usleep.c
index 1d58b98..7c35f6c 100644
--- a/lib/libc/gen/usleep.c
+++ b/lib/libc/gen/usleep.c
@@ -40,24 +40,16 @@ __FBSDID("$FreeBSD$");
 
 #include "libc_private.h"
 
-#pragma weak usleep
 int
-usleep(useconds_t useconds)
-{
-
-	return (((int (*)(useconds_t))
-	    __libc_interposing[INTERPOS_usleep])(useconds));
-}
-
-int
-__libc_usleep(useconds_t useconds)
+__usleep(useconds_t useconds)
 {
 	struct timespec time_to_sleep;
 
 	time_to_sleep.tv_nsec = (useconds % 1000000) * 1000;
 	time_to_sleep.tv_sec = useconds / 1000000;
-	return (_nanosleep(&time_to_sleep, NULL));
+	return (((int (*)(const struct timespec *, struct timespec *))
+	    __libc_interposing[INTERPOS_nanosleep])(&time_to_sleep, NULL));
 }
 
-__weak_reference(__libc_usleep, __usleep);
-__weak_reference(__libc_usleep, _usleep);
+__weak_reference(__usleep, usleep);
+__weak_reference(__usleep, _usleep);