add _nsec() syscall 53 for binary compatibility with labs distribution

the new syscall is added under the symbol _nsec() for
binary compatibility.

nsec() is still a library function reading /dev/bintime.

1 files changed, 13 insertions, 0 deletions

diff --git a/sys/src/9/port/sysproc.c b/sys/src/9/port/sysproc.c
index 5a602112a..fbe4f2fbc 100644
--- a/sys/src/9/port/sysproc.c
+++ b/sys/src/9/port/sysproc.c
@@ -1182,3 +1182,16 @@ syssemrelease(va_list list)
 		error(Ebadarg);
 	return (uintptr)semrelease(s, addr, delta);
 }
+
+/* For binary compatibility */
+uintptr
+sys_nsec(va_list list)
+{
+	vlong *v;
+
+	v = va_arg(list, vlong*);
+	evenaddr((uintptr)v);
+	validaddr((uintptr)v, sizeof(vlong), 1);
+	*v = todget(nil);
+	return 0;
+}