94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
/* Definitions for frame unwinder, for GDB, the GNU debugger.
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Copyright 2003, 2004 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 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 "frame.h"
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#include "frame-unwind.h"
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#include "gdb_assert.h"
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#include "dummy-frame.h"
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#include "gdb_obstack.h"
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static struct gdbarch_data *frame_unwind_data;
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struct frame_unwind_table_entry
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{
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frame_unwind_sniffer_ftype *sniffer;
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struct frame_unwind_table_entry *next;
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};
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struct frame_unwind_table
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{
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struct frame_unwind_table_entry *head;
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struct frame_unwind_table_entry **tail;
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};
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static void *
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frame_unwind_init (struct obstack *obstack)
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{
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struct frame_unwind_table *table
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= OBSTACK_ZALLOC (obstack, struct frame_unwind_table);
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table->head = OBSTACK_ZALLOC (obstack, struct frame_unwind_table_entry);
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table->head->sniffer = dummy_frame_sniffer;
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table->tail = &table->head->next;
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return table;
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}
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void
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frame_unwind_append_sniffer (struct gdbarch *gdbarch,
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frame_unwind_sniffer_ftype *sniffer)
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{
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struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
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(*table->tail) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
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(*table->tail)->sniffer = sniffer;
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table->tail = &((*table->tail)->next);
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}
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const struct frame_unwind *
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frame_unwind_find_by_frame (struct frame_info *next_frame)
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{
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int i;
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struct gdbarch *gdbarch = get_frame_arch (next_frame);
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struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
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struct frame_unwind_table_entry *entry;
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if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES && legacy_frame_p (gdbarch))
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/* Seriously old code. Don't even try to use this new mechanism.
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(Note: The variable USE_GENERIC_DUMMY_FRAMES is deprecated, not
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the dummy frame mechanism. All architectures should be using
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generic dummy frames). */
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return legacy_saved_regs_unwind;
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for (entry = table->head; entry != NULL; entry = entry->next)
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{
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const struct frame_unwind *desc;
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desc = entry->sniffer (next_frame);
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if (desc != NULL)
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return desc;
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}
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return legacy_saved_regs_unwind;
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}
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extern initialize_file_ftype _initialize_frame_unwind; /* -Wmissing-prototypes */
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void
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_initialize_frame_unwind (void)
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{
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frame_unwind_data = gdbarch_data_register_pre_init (frame_unwind_init);
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}
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