669fac235d
"struct value". * frame.c (frame_debug): Make global. (get_frame_id): Pass this frame to unwinder routines. (frame_pc_unwind): Remove unused unwind->prev_pc support. (do_frame_register_read): Do not discard the return value of frame_register_read. (frame_register_unwind): Remove debug messages. Use frame_unwind_register_value. (frame_unwind_register_value, get_frame_register_value): New functions. (create_new_frame, get_frame_base_address, get_frame_locals_address) (get_frame_args_address, get_frame_type): Pass this frame to unwinder routines. (frame_cleanup_after_sniffer, frame_prepare_for_sniffer): New functions. * frame.h: Update comments. (frame_debug, frame_unwind_register_value, get_frame_register_value) (frame_prepare_for_sniffer): Declare. * frame-unwind.h: Update comments and parameter names. (default_frame_sniffer): Declare. (frame_prev_register_ftype): Return a struct value *. (struct frame_unwind): Remove prev_pc member. (frame_unwind_sniffer_ftype, frame_unwind_append_sniffer): Delete. (frame_unwind_append_unwinder, frame_unwind_got_optimized) (frame_unwind_got_register, frame_unwind_got_memory) (frame_unwind_got_constant, frame_unwind_got_address): Declare. * frame-base.h: Update comments and parameter names. * valops.c (value_fetch_lazy): Use get_frame_register_value. Iterate if necessary. Add debugging output. * sentinel-frame.c (sentinel_frame_prev_register) (sentinel_frame_this_id): Update for new signature. (sentinel_frame_prev_pc): Delete. (sentinel_frame_unwinder): Remove prev_pc. * ia64-tdep.c (ia64_libunwind_frame_unwind): Do not initialize prev_pc. * libunwind-frame.c (libunwind_frame_unwind): Likewise. * frame-unwind.c (struct frame_unwind_table_entry): Remove sniffer. (frame_unwind_append_sniffer): Delete. (frame_unwind_append_unwinder): New function. (frame_unwind_find_by_frame): Take this frame. Only use sniffers from unwinders. Use frame_prepare_for_sniffer. (default_frame_sniffer, frame_unwind_got_optimized) (frame_unwind_got_register, frame_unwind_got_memory) (frame_unwind_got_constant, frame_unwind_got_address): New functions. * dummy-frame.c (dummy_frame_sniffer): Use gdbarch_dummy_id. (dummy_frame_prev_register, dummy_frame_this_id): Update for new signature. * gdbarch.sh: Replace unwind_dummy_id with dummy_id. * gdbarch.c, gdbarch.c: Regenerated. * frame-base.c (default_frame_base_address) (default_frame_locals_address, default_frame_args_address): Update for new signature. (frame_base_find_by_frame): Pass this frame to unwinder routines. * infcall.c (call_function_by_hand): Update comments. * Makefile.in (frame-unwind.o): Update dependencies. * gdbint.texinfo (Stack Frames): New chapter. (Algorithms): Move Frames text to the new chapter. (Target Conditionals): Delete SAVE_DUMMY_FRAME_TOS. Document gdbarch_dummy_id instead of gdbarch_unwind_dummy_id.
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/* Code dealing with register stack frames, for GDB, the GNU debugger.
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Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001, 2002, 2007, 2008
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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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#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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static struct value *
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sentinel_frame_prev_register (struct frame_info *this_frame,
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void **this_prologue_cache,
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int regnum)
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{
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struct gdbarch *gdbarch = get_frame_arch (this_frame);
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struct frame_unwind_cache *cache = *this_prologue_cache;
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struct value *value;
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/* Return the actual value. */
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value = allocate_value (register_type (gdbarch, regnum));
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VALUE_LVAL (value) = lval_register;
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VALUE_REGNUM (value) = regnum;
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VALUE_FRAME_ID (value) = get_frame_id (this_frame);
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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, value_contents_raw (value));
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return value;
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}
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static void
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sentinel_frame_this_id (struct frame_info *this_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,
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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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