Here's a patch to gdb-4.13 to add dyadic frames, as per J"org Wunsch.

Could somebody apply it?
Submitted by:	gj

gnu/usr.bin/binutils/gdb/i386/freebsd-nat.c

@@ -17,7 +17,7 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-	$Id: freebsd-nat.c,v 1.2 1994/12/30 23:25:44 jkh Exp $
+	$Id: freebsd-nat.c,v 1.3 1994/12/31 17:00:09 bde Exp $
 */
 
 #include <sys/types.h>
@@ -297,6 +297,18 @@ i386_float_info ()
   print_387_status (fpstatep->sv_ex_sw, (struct env387 *)fpstatep);
 }
 
+#ifdef SETUP_ARBITRARY_FRAME
+FRAME
+setup_arbitrary_frame (numargs, args)
+int numargs;
+unsigned int *args;
+{
+      if (numargs > 2)
+                    error ("Too many args in frame specification");
+      return create_new_frame ((CORE_ADDR)args[0], (CORE_ADDR)args[1]);
+}
+#endif
+
 #ifdef KERNEL_DEBUG
 #include <sys/proc.h>
 #include <sys/stat.h>

gnu/usr.bin/binutils/gdb/i386/tm.h

@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#ifndef _FREEBSD_TM_H_
+#define _FREEBSD_TM_H_
 /* Override number of expected traps from sysv. */
 #define START_INFERIOR_TRAPS_EXPECTED 2
 
@@ -79,3 +81,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
     ? sigtramp_saved_pc (FRAME) \
     : read_memory_integer ((FRAME)->frame + 4, 4)) \
    )
+
+#undef SETUP_ARBITRARY_FRAME
+#include "frame.h"
+extern FRAME setup_arbitrary_frame ();
+#define SETUP_ARBITRARY_FRAME setup_arbitrary_frame
+
+#endif /* _FREEBSD_TM_H_ */

gnu/usr.bin/gdb/gdb/freebsd-nat.c

@@ -17,7 +17,7 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-	$Id: freebsd-nat.c,v 1.2 1994/12/30 23:25:44 jkh Exp $
+	$Id: freebsd-nat.c,v 1.3 1994/12/31 17:00:09 bde Exp $
 */
 
 #include <sys/types.h>
@@ -297,6 +297,18 @@ i386_float_info ()
   print_387_status (fpstatep->sv_ex_sw, (struct env387 *)fpstatep);
 }
 
+#ifdef SETUP_ARBITRARY_FRAME
+FRAME
+setup_arbitrary_frame (numargs, args)
+int numargs;
+unsigned int *args;
+{
+      if (numargs > 2)
+                    error ("Too many args in frame specification");
+      return create_new_frame ((CORE_ADDR)args[0], (CORE_ADDR)args[1]);
+}
+#endif
+
 #ifdef KERNEL_DEBUG
 #include <sys/proc.h>
 #include <sys/stat.h>

gnu/usr.bin/gdb/gdb/tm.h

@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
+#ifndef _FREEBSD_TM_H_
+#define _FREEBSD_TM_H_
 /* Override number of expected traps from sysv. */
 #define START_INFERIOR_TRAPS_EXPECTED 2
 
@@ -79,3 +81,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
     ? sigtramp_saved_pc (FRAME) \
     : read_memory_integer ((FRAME)->frame + 4, 4)) \
    )
+
+#undef SETUP_ARBITRARY_FRAME
+#include "frame.h"
+extern FRAME setup_arbitrary_frame ();
+#define SETUP_ARBITRARY_FRAME setup_arbitrary_frame
+
+#endif /* _FREEBSD_TM_H_ */