1 files changed, 22 insertions, 0 deletions

diff --git a/lib/libc/sys/bind.2 b/lib/libc/sys/bind.2
index 18512e29e5c9..f98631d7939b 100644
--- a/lib/libc/sys/bind.2
+++ b/lib/libc/sys/bind.2
@@ -62,6 +62,28 @@ needed (using
 .Pp
 The rules used in name binding vary between communication domains.
 Consult the manual entries in section 4 for detailed information.
+.Sh IMPLEMENTATION NOTES
+.Pp
+In the non-threaded library
+.Fn bind
+is implemented as the
+.Va bind
+syscall.
+.Pp
+In the threaded library, the
+.Va bind
+syscall is assembled to
+.Fn _thread_sys_bind
+and
+.Fn bind
+is implemented as a function which locks
+.Va s
+for read and write, then calls
+.Fn _thread_sys_bind .
+Before returning,
+.Fn bind
+unlocks
+.Va s .
 .Sh RETURN VALUES
 If the bind is successful, a 0 value is returned.
 A return value of -1 indicates an error, which is