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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-7.1/] [gdb/] [trad-frame.h] - Blame information for rev 842

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1 227 jeremybenn
/* Traditional frame unwind support, for GDB the GNU Debugger.
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   Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
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   Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#ifndef TRAD_FRAME_H
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#define TRAD_FRAME_H
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#include "frame.h"              /* For "struct frame_id".  */
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struct frame_info;
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struct trad_frame_cache;
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/* A simple, or traditional frame cache.
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   The entire cache is populated in a single pass and then generic
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   routines are used to extract the various cache values.  */
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struct trad_frame_cache *trad_frame_cache_zalloc (struct frame_info *this_frame);
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/* This frame's ID.  */
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void trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
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                        struct frame_id this_id);
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void trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
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                        struct frame_id *this_id);
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void trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
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                               CORE_ADDR this_base);
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CORE_ADDR trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache);
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void trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
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                                 int regnum, int realreg);
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void trad_frame_set_reg_unknown (struct trad_frame_cache *this_trad_cache,
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                                 int regnum, CORE_ADDR addr);
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void trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
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                              int regnum, CORE_ADDR addr);
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void trad_frame_set_reg_value (struct trad_frame_cache *this_cache,
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                               int regnum, LONGEST val);
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struct value *trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
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                                       struct frame_info *this_frame,
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                                       int regnum);
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/* A traditional saved regs table, indexed by REGNUM, encoding where
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   the value of REGNUM for the previous frame can be found in this
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   frame.
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   The table is initialized with an identity encoding (ADDR == -1,
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   REALREG == REGNUM) indicating that the value of REGNUM in the
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   previous frame can be found in register REGNUM (== REALREG) in this
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   frame.
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   The initial encoding can then be changed:
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   Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value
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   of register REGNUM in the previous frame can be found in memory at
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   ADDR in this frame (addr_p, !realreg_p, !value_p).
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   Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the
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   value of register REGNUM in the previous frame is found in register
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   REALREG in this frame (!addr_p, realreg_p, !value_p).
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   Call trad_frame_set_value (REALREG == -1) to indicate that the
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   value of register REGNUM in the previous frame is found in ADDR
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   (!addr_p, !realreg_p, value_p).
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   Call trad_frame_set_unknown (REALREG == -2) to indicate that the
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   register's value is not known.  */
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struct trad_frame_saved_reg
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{
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  LONGEST addr; /* A CORE_ADDR fits in a longest.  */
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  int realreg;
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};
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/* Encode REGNUM value in the trad-frame.  */
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void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
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                           int regnum, LONGEST val);
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/* Mark REGNUM as unknown.  */
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void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
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                             int regnum);
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/* Convenience functions, return non-zero if the register has been
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   encoded as specified.  */
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int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[],
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                        int regnum);
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int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[],
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                       int regnum);
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int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
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                          int regnum);
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/* Return a freshly allocated (and initialized) trad_frame array.  */
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struct trad_frame_saved_reg *trad_frame_alloc_saved_regs (struct frame_info *this_frame);
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/* Given the trad_frame info, return the location of the specified
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   register.  */
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struct value *trad_frame_get_prev_register (struct frame_info *this_frame,
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                                            struct trad_frame_saved_reg this_saved_regs[],
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                                            int regnum);
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#endif

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