1 files changed, 17 insertions, 0 deletions

diff --git a/lib/libc/sys/execve.2 b/lib/libc/sys/execve.2
index ba47e6d1833c..2bfb0a2bc254 100644
--- a/lib/libc/sys/execve.2
+++ b/lib/libc/sys/execve.2
@@ -178,6 +178,23 @@ and
 .Fa argv
 points to the array of character pointers
 to the arguments themselves.
+.Sh IMPLEMENTATION NOTES
+.Pp
+In the non-threaded library
+.Fn execve
+is implemented as the
+.Va execve
+syscall.
+.Pp
+In the threaded library, the
+.Va execve
+syscall is assembled to
+.Fn _thread_sys_execve
+and
+.Fn execve
+is implemented as a function which performs user-thread
+library re-initialization and then calls
+.Fn _thread_sys_execve .
 .Sh RETURN VALUES
 As the
 .Fn execve