| /* Definitions for frame unwinder, for GDB, the GNU debugger. |
| |
| Copyright 2003 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 2 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, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "frame.h" |
| #include "frame-unwind.h" |
| #include "gdb_assert.h" |
| #include "dummy-frame.h" |
| |
| static struct gdbarch_data *frame_unwind_data; |
| |
| struct frame_unwind_table |
| { |
| frame_unwind_p_ftype **p; |
| int middle; |
| int nr; |
| }; |
| |
| /* Append a predicate to the end of the table. */ |
| static void |
| append_predicate (struct frame_unwind_table *table, frame_unwind_p_ftype *p) |
| { |
| table->p = xrealloc (table->p, ((table->nr + 1) |
| * sizeof (frame_unwind_p_ftype *))); |
| table->p[table->nr] = p; |
| table->nr++; |
| } |
| |
| static void * |
| frame_unwind_init (struct gdbarch *gdbarch) |
| { |
| struct frame_unwind_table *table = XCALLOC (1, struct frame_unwind_table); |
| append_predicate (table, dummy_frame_p); |
| return table; |
| } |
| |
| static void |
| frame_unwind_free (struct gdbarch *gdbarch, void *data) |
| { |
| struct frame_unwind_table *table = |
| gdbarch_data (gdbarch, frame_unwind_data); |
| xfree (table->p); |
| xfree (table); |
| } |
| |
| void |
| frame_unwind_append_predicate (struct gdbarch *gdbarch, |
| frame_unwind_p_ftype *p) |
| { |
| struct frame_unwind_table *table = |
| gdbarch_data (gdbarch, frame_unwind_data); |
| if (table == NULL) |
| { |
| /* ULGH, called during architecture initialization. Patch |
| things up. */ |
| table = frame_unwind_init (gdbarch); |
| set_gdbarch_data (gdbarch, frame_unwind_data, table); |
| } |
| append_predicate (table, p); |
| } |
| |
| const struct frame_unwind * |
| frame_unwind_find_by_pc (struct gdbarch *gdbarch, CORE_ADDR pc) |
| { |
| int i; |
| struct frame_unwind_table *table = |
| gdbarch_data (gdbarch, frame_unwind_data); |
| /* Seriously old code. Don't even try to use this new mechanism. */ |
| if (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES) |
| return trad_frame_unwind; |
| for (i = 0; i < table->nr; i++) |
| { |
| const struct frame_unwind *desc = table->p[i] (pc); |
| if (desc != NULL) |
| return desc; |
| } |
| return trad_frame_unwind; |
| } |
| |
| void |
| _initialize_frame_unwind (void) |
| { |
| frame_unwind_data = register_gdbarch_data (frame_unwind_init, |
| frame_unwind_free); |
| } |