/* Code dealing with register stack frames, for GDB, the GNU debugger. Copyright (C) 1986-2015 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/>. */ #include "defs.h" #include "regcache.h" #include "sentinel-frame.h" #include "inferior.h" #include "frame-unwind.h" struct frame_unwind_cache { struct regcache *regcache; }; void * sentinel_frame_cache (struct regcache *regcache) { struct frame_unwind_cache *cache = FRAME_OBSTACK_ZALLOC (struct frame_unwind_cache); cache->regcache = regcache; return cache; } /* Here the register value is taken direct from the register cache. */ static struct value * sentinel_frame_prev_register (struct frame_info *this_frame, void **this_prologue_cache, int regnum) { struct frame_unwind_cache *cache = *this_prologue_cache; struct value *value; value = regcache_cooked_read_value (cache->regcache, regnum); VALUE_FRAME_ID (value) = get_frame_id (this_frame); return value; } static void sentinel_frame_this_id (struct frame_info *this_frame, void **this_prologue_cache, struct frame_id *this_id) { /* The sentinel frame is used as a starting point for creating the previous (inner most) frame. That frame's THIS_ID method will be called to determine the inner most frame's ID. Not this one. */ internal_error (__FILE__, __LINE__, _("sentinel_frame_this_id called")); } static struct gdbarch * sentinel_frame_prev_arch (struct frame_info *this_frame, void **this_prologue_cache) { struct frame_unwind_cache *cache = *this_prologue_cache; return get_regcache_arch (cache->regcache); } const struct frame_unwind sentinel_frame_unwind = { SENTINEL_FRAME, default_frame_unwind_stop_reason, sentinel_frame_this_id, sentinel_frame_prev_register, NULL, NULL, NULL, sentinel_frame_prev_arch, };