/* Signal trampoline unwinder, for GDB the GNU Debugger.
- Copyright (C) 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2004-2020 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
+ 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,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "tramp-frame.h"
#include "target.h"
#include "trad-frame.h"
#include "frame-base.h"
-#include "gdb_assert.h"
struct frame_data
{
};
static struct trad_frame_cache *
-tramp_frame_cache (struct frame_info *next_frame,
+tramp_frame_cache (struct frame_info *this_frame,
void **this_cache)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- struct tramp_frame_cache *tramp_cache = (*this_cache);
+ struct tramp_frame_cache *tramp_cache
+ = (struct tramp_frame_cache *) *this_cache;
+
if (tramp_cache->trad_cache == NULL)
{
- tramp_cache->trad_cache = trad_frame_cache_zalloc (next_frame);
+ tramp_cache->trad_cache = trad_frame_cache_zalloc (this_frame);
tramp_cache->tramp_frame->init (tramp_cache->tramp_frame,
- next_frame,
+ this_frame,
tramp_cache->trad_cache,
tramp_cache->func);
}
}
static void
-tramp_frame_this_id (struct frame_info *next_frame,
+tramp_frame_this_id (struct frame_info *this_frame,
void **this_cache,
struct frame_id *this_id)
{
struct trad_frame_cache *trad_cache
- = tramp_frame_cache (next_frame, this_cache);
+ = tramp_frame_cache (this_frame, this_cache);
+
trad_frame_get_id (trad_cache, this_id);
}
-static void
-tramp_frame_prev_register (struct frame_info *next_frame,
+static struct value *
+tramp_frame_prev_register (struct frame_info *this_frame,
void **this_cache,
- int prev_regnum,
- int *optimizedp,
- enum lval_type * lvalp,
- CORE_ADDR *addrp,
- int *realnump, gdb_byte *valuep)
+ int prev_regnum)
{
struct trad_frame_cache *trad_cache
- = tramp_frame_cache (next_frame, this_cache);
- trad_frame_get_register (trad_cache, next_frame, prev_regnum, optimizedp,
- lvalp, addrp, realnump, valuep);
+ = tramp_frame_cache (this_frame, this_cache);
+
+ return trad_frame_get_register (trad_cache, this_frame, prev_regnum);
}
static CORE_ADDR
tramp_frame_start (const struct tramp_frame *tramp,
- struct frame_info *next_frame, CORE_ADDR pc)
+ struct frame_info *this_frame, CORE_ADDR pc)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int ti;
+
+ /* Check if we can use this trampoline. */
+ if (tramp->validate && !tramp->validate (tramp, this_frame, &pc))
+ return 0;
+
/* Search through the trampoline for one that matches the
instruction sequence around PC. */
for (ti = 0; tramp->insn[ti].bytes != TRAMP_SENTINEL_INSN; ti++)
{
CORE_ADDR func = pc - tramp->insn_size * ti;
int i;
+
for (i = 0; 1; i++)
{
gdb_byte buf[sizeof (tramp->insn[0])];
ULONGEST insn;
+
if (tramp->insn[i].bytes == TRAMP_SENTINEL_INSN)
return func;
- if (!safe_frame_unwind_memory (next_frame,
+ if (!safe_frame_unwind_memory (this_frame,
func + i * tramp->insn_size,
buf, tramp->insn_size))
break;
- insn = extract_unsigned_integer (buf, tramp->insn_size);
+ insn = extract_unsigned_integer (buf, tramp->insn_size, byte_order);
if (tramp->insn[i].bytes != (insn & tramp->insn[i].mask))
break;
}
static int
tramp_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
void **this_cache)
{
const struct tramp_frame *tramp = self->unwind_data->tramp_frame;
- CORE_ADDR pc = frame_pc_unwind (next_frame);
+ CORE_ADDR pc = get_frame_pc (this_frame);
CORE_ADDR func;
struct tramp_frame_cache *tramp_cache;
section, then this is not a trampoline. However, this assumption is
false on HPUX which has a signal trampoline that has a name; it can
also be false when using an alternative signal stack. */
- func = tramp_frame_start (tramp, next_frame, pc);
+ func = tramp_frame_start (tramp, this_frame, pc);
if (func == 0)
return 0;
tramp_cache = FRAME_OBSTACK_ZALLOC (struct tramp_frame_cache);
unwinder->type = tramp_frame->frame_type;
unwinder->unwind_data = data;
unwinder->sniffer = tramp_frame_sniffer;
+ unwinder->stop_reason = default_frame_unwind_stop_reason;
unwinder->this_id = tramp_frame_this_id;
unwinder->prev_register = tramp_frame_prev_register;
frame_unwind_prepend_unwinder (gdbarch, unwinder);