2002-11-08 Andrew Cagney <ac131313@redhat.com>

	* blockframe.c: Include "dummy-frame.h".
	(struct dummy_frame, dummy_frame_stack)
	(generic_find_dummy_frame, deprecated_generic_find_dummy_frame)
	(generic_pc_in_call_dummy, deprecated_read_register_dummy)
	(generic_push_dummy_frame, generic_save_dummy_frame_tos)
	(generic_save_call_dummy_addr, generic_pop_current_frame)
	(generic_pop_dummy_frame, generic_fix_call_dummy)
	(generic_fix_call_dummy, generic_call_dummy_register_unwind): Move
	dummy frame code from here...
	* dummy-frame.c: ...to here.  New file.
	* dummy-frame.h: New file.
	(generic_call_dummy_register_unwind): Declare.
	(generic_find_dummy_frame): Declare.
	* Makefile.in (SFILES): Add dummy-frame.c.
	(dummy-frame.o): Specify dependencies.
	(dummy_frame_h): Define.
	(COMMON_OBS): Add dummy-frame.o.
	(blockframe.o): Update dependencies.

1 files changed, 66 insertions, 0 deletions

diff --git a/gdb/dummy-frame.h b/gdb/dummy-frame.h
new file mode 100644
index 0000000..6bdebee
--- /dev/null
+++ b/gdb/dummy-frame.h
@@ -0,0 +1,66 @@
+/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
+
+   Copyright 2002 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#if !defined (DUMMY_FRAME_H)
+#define DUMMY_FRAME_H 1
+
+struct frame_info;
+struct regcache;
+
+/* GENERIC DUMMY FRAMES
+  
+   The following code serves to maintain the dummy stack frames for
+   inferior function calls (ie. when gdb calls into the inferior via
+   call_function_by_hand).  This code saves the machine state before
+   the call in host memory, so we must maintain an independent stack
+   and keep it consistant etc.  I am attempting to make this code
+   generic enough to be used by many targets.
+ 
+   The cheapest and most generic way to do CALL_DUMMY on a new target
+   is probably to define CALL_DUMMY to be empty, CALL_DUMMY_LENGTH to
+   zero, and CALL_DUMMY_LOCATION to AT_ENTRY.  Then you must remember
+   to define PUSH_RETURN_ADDRESS, because no call instruction will be
+   being executed by the target.  Also FRAME_CHAIN_VALID as
+   generic_{file,func}_frame_chain_valid and FIX_CALL_DUMMY as
+   generic_fix_call_dummy.  */
+
+/* Assuming that FRAME is a dummy, return a register value for the
+   previous frame.  */
+
+extern void generic_call_dummy_register_unwind (struct frame_info *frame,
+						void **unwind_cache,
+						int regnum,
+						int *optimized,
+						enum lval_type *lvalp,
+						CORE_ADDR *addrp,
+						int *realnump,
+						void *valuep);
+
+/* Return the regcache that belongs to the dummy-frame identifed by PC
+   and FP, or NULL if no such frame exists.  */
+/* FIXME: cagney/2002-11-08: The function only exists because of
+   deprecated_generic_get_saved_register.  Eliminate that function and
+   this, to, can go.  */
+
+extern struct regcache *generic_find_dummy_frame (CORE_ADDR pc,
+						  CORE_ADDR fp);
+
+#endif /* !defined (DUMMY_FRAME_H)  */