fb2be677dc
* frame-unwind.c (struct frame_unwind_table, frame_unwind_init) (frame_unwind_prepend_unwinder, frame_unwind_append_sniffer) (frame_unwind_find_by_frame): Re-implement the unwind code so that it can both prepend and append sniffers. Replace frame_unwind_register_unwinder with frame_unwind_prepend_unwinder. * tramp-frame.c (tramp_frame_append): Use frame_unwind_prepend_unwinder. * frame-unwind.h (frame_unwind_prepend_unwinder): Replace frame_unwind_register_unwinder. * tramp-frame.h (tramp_frame_prepend_unwinder): Rename tramp_frame_append. * tramp-frame.c (tramp_frame_prepend_unwinder): Update. * mips-linux-tdep.c (mips_linux_init_abi, mips_linux_init_abi) (mips_linux_init_abi): Update.
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/* Definitions for frame unwinder, for GDB, the GNU debugger.
|
|
|
|
Copyright 2003, 2004 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"
|
|
#include "gdb_obstack.h"
|
|
|
|
static struct gdbarch_data *frame_unwind_data;
|
|
|
|
struct frame_unwind_table_entry
|
|
{
|
|
frame_unwind_sniffer_ftype *sniffer;
|
|
const struct frame_unwind *unwinder;
|
|
struct frame_unwind_table_entry *next;
|
|
};
|
|
|
|
struct frame_unwind_table
|
|
{
|
|
struct frame_unwind_table_entry *list;
|
|
/* The head of the OSABI part of the search list. */
|
|
struct frame_unwind_table_entry **osabi_head;
|
|
};
|
|
|
|
static void *
|
|
frame_unwind_init (struct obstack *obstack)
|
|
{
|
|
struct frame_unwind_table *table
|
|
= OBSTACK_ZALLOC (obstack, struct frame_unwind_table);
|
|
/* Start the table out with a few default sniffers. OSABI code
|
|
can't override this. */
|
|
table->list = OBSTACK_ZALLOC (obstack, struct frame_unwind_table_entry);
|
|
table->list->sniffer = dummy_frame_sniffer;
|
|
/* The insertion point for OSABI sniffers. */
|
|
table->osabi_head = &table->list->next;
|
|
return table;
|
|
}
|
|
|
|
void
|
|
frame_unwind_append_sniffer (struct gdbarch *gdbarch,
|
|
frame_unwind_sniffer_ftype *sniffer)
|
|
{
|
|
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
|
|
struct frame_unwind_table_entry **ip;
|
|
|
|
/* Find the end of the list and insert the new entry there. */
|
|
for (ip = table->osabi_head; (*ip) != NULL; ip = &(*ip)->next);
|
|
(*ip) = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
|
|
(*ip)->sniffer = sniffer;
|
|
}
|
|
|
|
void
|
|
frame_unwind_prepend_unwinder (struct gdbarch *gdbarch,
|
|
const struct frame_unwind *unwinder)
|
|
{
|
|
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
|
|
struct frame_unwind_table_entry *entry;
|
|
|
|
/* Insert the new entry at the start of the list. */
|
|
entry = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct frame_unwind_table_entry);
|
|
entry->unwinder = unwinder;
|
|
entry->next = (*table->osabi_head);
|
|
(*table->osabi_head) = entry;
|
|
}
|
|
|
|
const struct frame_unwind *
|
|
frame_unwind_find_by_frame (struct frame_info *next_frame, void **this_cache)
|
|
{
|
|
int i;
|
|
struct gdbarch *gdbarch = get_frame_arch (next_frame);
|
|
struct frame_unwind_table *table = gdbarch_data (gdbarch, frame_unwind_data);
|
|
struct frame_unwind_table_entry *entry;
|
|
for (entry = table->list; entry != NULL; entry = entry->next)
|
|
{
|
|
if (entry->sniffer != NULL)
|
|
{
|
|
const struct frame_unwind *desc = NULL;
|
|
desc = entry->sniffer (next_frame);
|
|
if (desc != NULL)
|
|
return desc;
|
|
}
|
|
if (entry->unwinder != NULL)
|
|
{
|
|
if (entry->unwinder->sniffer (entry->unwinder, next_frame,
|
|
this_cache))
|
|
return entry->unwinder;
|
|
}
|
|
}
|
|
return legacy_saved_regs_unwind;
|
|
}
|
|
|
|
extern initialize_file_ftype _initialize_frame_unwind; /* -Wmissing-prototypes */
|
|
|
|
void
|
|
_initialize_frame_unwind (void)
|
|
{
|
|
frame_unwind_data = gdbarch_data_register_pre_init (frame_unwind_init);
|
|
}
|