6dc42492b6
Fix frame off-by-one bug. * frame-unwind.h (frame_this_id_ftype): Replace frame_unwind_id_ftype. (frame_prev_register_ftype): Replace frame_unwind_reg_ftype. (struct frame_unwind): Replace "id" with "this_id". Replace "reg" with "prev_register". * frame-unwind.c (frame_unwind_find_by_pc): Return legacy_saved_regs_unwind instead of trad_frame_unwind. Update comment. * dummy-frame.c (cached_find_dummy_frame): Delete function. (dummy_frame_this_id): Replace dummy_frame_id_unwind. (dummy_frame_prev_register): Replace dummy_frame_register_unwind. (dummy_frame_unwind): Update. * sentinel-frame.c (sentinel_frame_prev_register): Replace sentinel_frame_register_unwind. (sentinel_frame_this_id): Replace sentinel_frame_id_unwind. (sentinel_frame_unwinder): Update. * frame.h (legacy_saved_regs_unwind): Replace trad_frame_unwind. (struct frame_info): Rename "unwind_cache" to "prologue_cache". * frame.c (create_sentinel_frame): Update. Initialize "prologue_cache" instead of "unwind_cache". (frame_register_unwind): Call this frame's prev_register with the next frame and this frame's prologue cache. (get_prev_frame): Simplify. Always call prev frame's this_id with this frame and prev frame's prologue cache. Document that this call is shifted one to the left when compared to the frame_register_unwind call. (legacy_saved_regs_prev_register): Replace frame_saved_regs_register_unwind. (legacy_saved_regs_this_id): Replace frame_saved_regs_id_unwind. (legacy_saved_regs_unwinder): Replace trad_frame_unwinder. (legacy_saved_regs_unwind): Replace trad_frame_unwind. * d10v-tdep.c (d10v_frame_this_id): Replace d10v_frame_id_unwind. (d10v_frame_unwind): Update. (d10v_frame_prev_register): Replace d10v_frame_register_unwind. (d10v_frame_unwind_cache): Replace this "fi" with "next_frame". (saved_regs_unwinder): Replace this "frame" with "next_frame", and "saved_regs" with "this_saved_regs".
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/* Code dealing with register stack frames, for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
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1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "regcache.h"
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#include "sentinel-frame.h"
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#include "inferior.h"
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#include "frame-unwind.h"
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struct frame_unwind_cache
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{
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struct regcache *regcache;
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};
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void *
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sentinel_frame_cache (struct regcache *regcache)
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{
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struct frame_unwind_cache *cache =
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FRAME_OBSTACK_ZALLOC (struct frame_unwind_cache);
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cache->regcache = regcache;
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return cache;
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}
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/* Here the register value is taken direct from the register cache. */
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void
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sentinel_frame_prev_register (struct frame_info *next_frame,
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void **this_prologue_cache,
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int regnum, int *optimized,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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int *realnum, void *bufferp)
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{
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struct frame_unwind_cache *cache = *this_prologue_cache;
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/* Describe the register's location. A reg-frame maps all registers
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onto the corresponding hardware register. */
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*optimized = 0;
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*lvalp = lval_register;
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*addrp = REGISTER_BYTE (regnum);
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*realnum = regnum;
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/* If needed, find and return the value of the register. */
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if (bufferp != NULL)
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{
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/* Return the actual value. */
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/* Use the regcache_cooked_read() method so that it, on the fly,
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constructs either a raw or pseudo register from the raw
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register cache. */
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regcache_cooked_read (cache->regcache, regnum, bufferp);
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}
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}
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void
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sentinel_frame_this_id (struct frame_info *next_frame,
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void **this_prologue_cache,
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struct frame_id *this_id)
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{
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/* The sentinel frame is used as a starting point for creating the
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previous (inner most) frame. That frame's THIS_ID method will be
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called to determine the inner most frame's ID. Not this one. */
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internal_error (__FILE__, __LINE__, "sentinel_frame_this_id called");
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}
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const struct frame_unwind sentinel_frame_unwinder =
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{
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sentinel_frame_this_id,
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sentinel_frame_prev_register
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};
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const struct frame_unwind *const sentinel_frame_unwind = &sentinel_frame_unwinder;
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