/* Signal trampoline unwinder, for GDB the GNU Debugger.
- Copyright (C) 2004, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 2004-2020 Free Software Foundation, Inc.
This file is part of GDB.
#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);