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2003-01-27 Andrew Cagney <ac131313@redhat.com>

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* sentinel-frame.h, sentinel-frame.c: New files.
	* Makefile.in (frame.o): Update dependencies.
	(SFILES): Add sentinel-frame.c.
	(sentinel_frame_h): Define.
	(COMMON_OBS): Add sentinel-frame.o.
	(sentinel-frame.o): Specify dependencies.
	* frame.c: Include "sentinel-frame.h".
	(frame_register_unwind): Rewrite assuming that there is always a a
	->next frame.
	(frame_register, generic_unwind_get_saved_register): Ditto.
	(frame_read_unsigned_register, frame_read_signed_register): Ditto.
	(create_sentinel_frame, unwind_to_current_frame): New functions.
	(get_current_frame): Rewrite using create_sentinel_frame and
	unwind_to_current_frame.  When possible, always create a frame.
	(create_new_frame): Set next to the sentinel frame.
	(get_next_frame): Rewrite.  Don't go below the level 0 frame.
	(deprecated_update_frame_pc_hack): Update the next frame's PC and
	ID cache when necessary.
	(frame_saved_regs_id_unwind): Use frame_relative_level.
	(deprecated_generic_get_saved_register): Use frame_relative_level,
	get_frame_saved_regs, get_frame_pc, get_frame_base and
	get_next_frame.
	(frame_saved_regs_register_unwind): Use get_frame_saved_regs and
	frame_register.
This commit is contained in:
Andrew Cagney
2003-01-27 21:41:41 +00:00
parent 5378adc435
commit a94dd1fda2
5 changed files with 328 additions and 132 deletions
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41
gdb/sentinel-frame.h Normal file
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/* Code dealing with register stack frames, for GDB, the GNU debugger.
Copyright 2003 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 (SENTINEL_FRAME_H)
#define SENTINEL_FRAME_H 1
struct frame_unwind;
struct regcache;
/* Implement the sentinel frame. The sentinel frame terminates the
inner most end of the frame chain. If unwound, it returns the
information need to construct an inner-most frame. */
/* Pump prime the sentinel frame's cache. Since this needs the
REGCACHE provide that here. */
extern void *sentinel_frame_cache (struct regcache *regcache);
/* At present there is only one type of sentinel frame. */
extern const struct frame_unwind *const sentinel_frame_unwind;
#endif /* !defined (SENTINEL_FRAME_H) */