* sigproc.h (sigframe::set): Eliminate second argument. Default bp to current

frame pointer rather than using this within the function, which is unstable
when this method is not inlined.
* net.cc: Eliminate use of second argument to sigframe.set throughout.
* select.cc (cygwin_select): Ditto.
* sigproc.cc (sig_send): Ditto.

winsup/cygwin/sigproc.h

@@ -49,15 +49,11 @@ private:
   sigthread *st;
 
 public:
-  void set (sigthread &t, int up = 1, DWORD ebp = 0)
+  void set (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0))
   {
     t.lock->acquire ();
     st = &t;
-    if (ebp)
-      t.frame = ebp;
-    else
-      t.frame = (DWORD) (up ? __builtin_frame_address (1) :
-			     __builtin_frame_address (0));
+    t.frame = ebp;
     t.lock->release ();
   }