[deliverable/binutils-gdb.git] / gdb / trad-frame.h

/* Traditional frame unwind support, for GDB the GNU Debugger.

   Copyright (C) 2003-2015 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 3 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, see <http://www.gnu.org/licenses/>.  */

#ifndef TRAD_FRAME_H
#define TRAD_FRAME_H

#include "frame.h"		/* For "struct frame_id".  */

struct frame_info;
struct trad_frame_cache;

/* A simple, or traditional frame cache.

   The entire cache is populated in a single pass and then generic
   routines are used to extract the various cache values.  */

struct trad_frame_cache *trad_frame_cache_zalloc (struct frame_info *);

/* This frame's ID.  */
void trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
			struct frame_id this_id);
void trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
			struct frame_id *this_id);
void trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
			       CORE_ADDR this_base);
CORE_ADDR trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache);

void trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
				 int regnum, int realreg);
void trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
			      int regnum, CORE_ADDR addr);
void trad_frame_set_reg_value (struct trad_frame_cache *this_cache,
			       int regnum, LONGEST val);

struct value *trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
				       struct frame_info *this_frame,
				       int regnum);

/* A traditional saved regs table, indexed by REGNUM, encoding where
   the value of REGNUM for the previous frame can be found in this
   frame.

   The table is initialized with an identity encoding (ADDR == -1,
   REALREG == REGNUM) indicating that the value of REGNUM in the
   previous frame can be found in register REGNUM (== REALREG) in this
   frame.

   The initial encoding can then be changed:

   Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value
   of register REGNUM in the previous frame can be found in memory at
   ADDR in this frame (addr_p, !realreg_p, !value_p).

   Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the
   value of register REGNUM in the previous frame is found in register
   REALREG in this frame (!addr_p, realreg_p, !value_p).

   Call trad_frame_set_value (REALREG == -1) to indicate that the
   value of register REGNUM in the previous frame is found in ADDR
   (!addr_p, !realreg_p, value_p).

   Call trad_frame_set_unknown (REALREG == -2) to indicate that the
   register's value is not known.  */

struct trad_frame_saved_reg
{
  LONGEST addr; /* A CORE_ADDR fits in a longest.  */
  int realreg;
};

/* Encode REGNUM value in the trad-frame.  */
void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
			   int regnum, LONGEST val);

/* Mark REGNUM as unknown.  */
void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
			     int regnum);

/* Convenience functions, return non-zero if the register has been
   encoded as specified.  */
int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[],
			int regnum);
int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[],
		       int regnum);
int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
			  int regnum);


/* Return a freshly allocated (and initialized) trad_frame array.  */
struct trad_frame_saved_reg *trad_frame_alloc_saved_regs (struct frame_info *);

/* Given the trad_frame info, return the location of the specified
   register.  */
struct value *trad_frame_get_prev_register (struct frame_info *this_frame,
					    struct trad_frame_saved_reg this_saved_regs[],
					    int regnum);

#endif
Commit	Line	Data
	1	/* Traditional frame unwind support, for GDB the GNU Debugger.
	2
	3	Copyright (C) 2003-2015 Free Software Foundation, Inc.
	4
	5	This file is part of GDB.
	6
	7	This program is free software; you can redistribute it and/or modify
	8	it under the terms of the GNU General Public License as published by
	9	the Free Software Foundation; either version 3 of the License, or
	10	(at your option) any later version.
	11
	12	This program is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with this program. If not, see <http://www.gnu.org/licenses/>. */
	19
	20	#ifndef TRAD_FRAME_H
	21	#define TRAD_FRAME_H
	22
	23	#include "frame.h" /* For "struct frame_id". */
	24
	25	struct frame_info;
	26	struct trad_frame_cache;
	27
	28	/* A simple, or traditional frame cache.
	29
	30	The entire cache is populated in a single pass and then generic
	31	routines are used to extract the various cache values. */
	32
	33	struct trad_frame_cache trad_frame_cache_zalloc (struct frame_info );
	34
	35	/* This frame's ID. */
	36	void trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
	37	struct frame_id this_id);
	38	void trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
	39	struct frame_id *this_id);
	40	void trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
	41	CORE_ADDR this_base);
	42	CORE_ADDR trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache);
	43
	44	void trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
	45	int regnum, int realreg);
	46	void trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
	47	int regnum, CORE_ADDR addr);
	48	void trad_frame_set_reg_value (struct trad_frame_cache *this_cache,
	49	int regnum, LONGEST val);
	50
	51	struct value trad_frame_get_register (struct trad_frame_cache this_trad_cache,
	52	struct frame_info *this_frame,
	53	int regnum);
	54
	55	/* A traditional saved regs table, indexed by REGNUM, encoding where
	56	the value of REGNUM for the previous frame can be found in this
	57	frame.
	58
	59	The table is initialized with an identity encoding (ADDR == -1,
	60	REALREG == REGNUM) indicating that the value of REGNUM in the
	61	previous frame can be found in register REGNUM (== REALREG) in this
	62	frame.
	63
	64	The initial encoding can then be changed:
	65
	66	Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value
	67	of register REGNUM in the previous frame can be found in memory at
	68	ADDR in this frame (addr_p, !realreg_p, !value_p).
	69
	70	Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the
	71	value of register REGNUM in the previous frame is found in register
	72	REALREG in this frame (!addr_p, realreg_p, !value_p).
	73
	74	Call trad_frame_set_value (REALREG == -1) to indicate that the
	75	value of register REGNUM in the previous frame is found in ADDR
	76	(!addr_p, !realreg_p, value_p).
	77
	78	Call trad_frame_set_unknown (REALREG == -2) to indicate that the
	79	register's value is not known. */
	80
	81	struct trad_frame_saved_reg
	82	{
	83	LONGEST addr; /* A CORE_ADDR fits in a longest. */
	84	int realreg;
	85	};
	86
	87	/* Encode REGNUM value in the trad-frame. */
	88	void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
	89	int regnum, LONGEST val);
	90
	91	/* Mark REGNUM as unknown. */
	92	void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
	93	int regnum);
	94
	95	/* Convenience functions, return non-zero if the register has been
	96	encoded as specified. */
	97	int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[],
	98	int regnum);
	99	int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[],
	100	int regnum);
	101	int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
	102	int regnum);
	103
	104
	105	/* Return a freshly allocated (and initialized) trad_frame array. */
	106	struct trad_frame_saved_reg trad_frame_alloc_saved_regs (struct frame_info );
	107
	108	/* Given the trad_frame info, return the location of the specified
	109	register. */
	110	struct value trad_frame_get_prev_register (struct frame_info this_frame,
	111	struct trad_frame_saved_reg this_saved_regs[],
	112	int regnum);
	113
	114	#endif