2002-11-09 03:42:00 +08:00
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/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
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Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
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2004-04-04 05:22:10 +08:00
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1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
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Software Foundation, Inc.
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2002-11-09 03:42:00 +08:00
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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 "dummy-frame.h"
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#include "regcache.h"
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#include "frame.h"
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#include "inferior.h"
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#include "gdb_assert.h"
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
(struct frame_unwind): Declare opaque.
(dummy_frame_p): Declare function.
* dummy-frame.c (dummy_frame_id_unwind): Make static.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
* dummy-frame.c: Include "frame-unwind.h".
(dummy_frame_p): New function.
(dummy_frame_unwind): New variable.
* frame.c: Include "frame-unwind.h".
(frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update
to use the new unwind field.
(set_unwind_by_pc): Delete function.
(create_new_frame, get_prev_frame): Set unwind field using
frame_unwind_find_by_pc.
(trad_frame_unwind, trad_frame_unwinder): New variables.
* frame.h (trad_frame_unwind): Declare variable.
(frame_id_unwind_ftype): Delete declaration.
(frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto.
(struct frame_unwind): Declare opaque.
(struct frame_info): Replace the fields id_unwind, pc_unwind and
register_unwind with a single unwind pointer.
* frame-unwind.h, frame-unwind.c: New files.
* Makefile.in (SFILES): Add frame-unwind.c.
(frame_unwind_h): Define.
(COMMON_OBS): Add frame-unwind.o.
(frame-unwind.o): Specify dependencies.
(frame.o, dummy-frame.o): Update dependencies.
2003-01-19 01:25:23 +08:00
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#include "frame-unwind.h"
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2003-05-06 02:33:11 +08:00
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#include "command.h"
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#include "gdbcmd.h"
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2004-08-03 01:39:53 +08:00
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#include "gdb_string.h"
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2002-11-09 03:42:00 +08:00
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/* Dummy frame. This saves the processor state just prior to setting
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up the inferior function call. Older targets save the registers
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on the target stack (but that really slows down function calls). */
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struct dummy_frame
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{
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struct dummy_frame *next;
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2004-08-03 02:52:03 +08:00
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/* This frame's ID. Must match the value returned by
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gdbarch_unwind_dummy_id. */
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2002-12-14 00:40:25 +08:00
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struct frame_id id;
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2004-08-03 02:52:03 +08:00
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/* The caller's regcache. */
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2002-11-09 03:42:00 +08:00
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struct regcache *regcache;
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};
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static struct dummy_frame *dummy_frame_stack = NULL;
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2004-08-03 02:52:03 +08:00
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/* Function: deprecated_pc_in_call_dummy (pc)
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2002-11-24 23:06:08 +08:00
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2004-08-03 02:52:03 +08:00
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Return non-zero if the PC falls in a dummy frame created by gdb for
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an inferior call. The code below which allows DECR_PC_AFTER_BREAK
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is for infrun.c, which may give the function a PC without that
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subtracted out.
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2002-11-24 23:06:08 +08:00
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FIXME: cagney/2002-11-23: This is silly. Surely "infrun.c" can
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figure out what the real PC (as in the resume address) is BEFORE
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2004-08-03 02:52:03 +08:00
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calling this function.
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NOTE: cagney/2004-08-02: I'm pretty sure that, with the introduction of
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infrun.c:adjust_pc_after_break (thanks), this function is now
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always called with a correctly adjusted PC!
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2002-11-24 23:06:08 +08:00
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2004-08-03 02:52:03 +08:00
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NOTE: cagney/2004-08-02: Code should not need to call this. */
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int
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deprecated_pc_in_call_dummy (CORE_ADDR pc)
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2002-11-09 03:42:00 +08:00
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{
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struct dummy_frame *dummyframe;
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for (dummyframe = dummy_frame_stack;
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dummyframe != NULL;
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dummyframe = dummyframe->next)
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{
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2004-08-03 02:52:03 +08:00
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if ((pc >= dummyframe->id.code_addr)
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&& (pc <= dummyframe->id.code_addr + DECR_PC_AFTER_BREAK))
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2002-11-09 03:42:00 +08:00
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return 1;
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}
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return 0;
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}
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2004-08-03 01:39:53 +08:00
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/* Push the caller's state, along with the dummy frame info, onto a
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dummy-frame stack. */
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2002-11-09 03:42:00 +08:00
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void
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2004-08-03 01:39:53 +08:00
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dummy_frame_push (struct regcache *caller_regcache,
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const struct frame_id *dummy_id)
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2002-11-09 03:42:00 +08:00
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{
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struct dummy_frame *dummy_frame;
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2004-08-03 01:39:53 +08:00
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/* Check to see if there are stale dummy frames, perhaps left over
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from when a longjump took us out of a function that was called by
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the debugger. */
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2002-11-09 03:42:00 +08:00
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dummy_frame = dummy_frame_stack;
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while (dummy_frame)
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2004-08-03 01:39:53 +08:00
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/* FIXME: cagney/2004-08-02: Should just test IDs. */
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2004-08-03 02:52:03 +08:00
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if (frame_id_inner (dummy_frame->id, (*dummy_id)))
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2004-08-03 01:39:53 +08:00
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/* Stale -- destroy! */
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2002-11-09 03:42:00 +08:00
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{
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dummy_frame_stack = dummy_frame->next;
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regcache_xfree (dummy_frame->regcache);
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xfree (dummy_frame);
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dummy_frame = dummy_frame_stack;
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}
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else
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dummy_frame = dummy_frame->next;
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2004-08-03 01:39:53 +08:00
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dummy_frame = XZALLOC (struct dummy_frame);
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dummy_frame->regcache = caller_regcache;
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dummy_frame->id = (*dummy_id);
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2002-11-09 03:42:00 +08:00
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dummy_frame->next = dummy_frame_stack;
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dummy_frame_stack = dummy_frame;
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}
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2004-08-03 00:07:31 +08:00
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/* Return the dummy frame cache, it contains both the ID, and a
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pointer to the regcache. */
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struct dummy_frame_cache
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{
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struct frame_id this_id;
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struct regcache *prev_regcache;
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};
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int
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dummy_frame_sniffer (const struct frame_unwind *self,
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struct frame_info *next_frame,
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void **this_prologue_cache)
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{
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struct dummy_frame *dummyframe;
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struct frame_id this_id;
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/* When unwinding a normal frame, the stack structure is determined
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by analyzing the frame's function's code (be it using brute force
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prologue analysis, or the dwarf2 CFI). In the case of a dummy
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frame, that simply isn't possible. The PC is either the program
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entry point, or some random address on the stack. Trying to use
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that PC to apply standard frame ID unwind techniques is just
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asking for trouble. */
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/* Use an architecture specific method to extract the prev's dummy
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ID from the next frame. Note that this method uses
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frame_register_unwind to obtain the register values needed to
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determine the dummy frame's ID. */
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this_id = gdbarch_unwind_dummy_id (get_frame_arch (next_frame), next_frame);
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/* Use that ID to find the corresponding cache entry. */
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for (dummyframe = dummy_frame_stack;
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dummyframe != NULL;
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dummyframe = dummyframe->next)
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{
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2004-08-03 02:52:03 +08:00
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if (frame_id_eq (dummyframe->id, this_id))
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{
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struct dummy_frame_cache *cache;
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cache = FRAME_OBSTACK_ZALLOC (struct dummy_frame_cache);
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cache->prev_regcache = dummyframe->regcache;
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cache->this_id = this_id;
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(*this_prologue_cache) = cache;
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return 1;
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}
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2004-08-03 00:07:31 +08:00
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}
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return 0;
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}
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2002-11-09 03:42:00 +08:00
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/* Given a call-dummy dummy-frame, return the registers. Here the
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register value is taken from the local copy of the register buffer. */
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
(struct frame_unwind): Declare opaque.
(dummy_frame_p): Declare function.
* dummy-frame.c (dummy_frame_id_unwind): Make static.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
* dummy-frame.c: Include "frame-unwind.h".
(dummy_frame_p): New function.
(dummy_frame_unwind): New variable.
* frame.c: Include "frame-unwind.h".
(frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update
to use the new unwind field.
(set_unwind_by_pc): Delete function.
(create_new_frame, get_prev_frame): Set unwind field using
frame_unwind_find_by_pc.
(trad_frame_unwind, trad_frame_unwinder): New variables.
* frame.h (trad_frame_unwind): Declare variable.
(frame_id_unwind_ftype): Delete declaration.
(frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto.
(struct frame_unwind): Declare opaque.
(struct frame_info): Replace the fields id_unwind, pc_unwind and
register_unwind with a single unwind pointer.
* frame-unwind.h, frame-unwind.c: New files.
* Makefile.in (SFILES): Add frame-unwind.c.
(frame_unwind_h): Define.
(COMMON_OBS): Add frame-unwind.o.
(frame-unwind.o): Specify dependencies.
(frame.o, dummy-frame.o): Update dependencies.
2003-01-19 01:25:23 +08:00
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static void
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2003-03-17 22:23:50 +08:00
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dummy_frame_prev_register (struct frame_info *next_frame,
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void **this_prologue_cache,
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int regnum, int *optimized,
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enum lval_type *lvalp, CORE_ADDR *addrp,
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int *realnum, void *bufferp)
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2002-11-09 03:42:00 +08:00
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{
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2004-08-03 00:07:31 +08:00
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/* The dummy-frame sniffer always fills in the cache. */
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struct dummy_frame_cache *cache = (*this_prologue_cache);
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gdb_assert (cache != NULL);
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2002-11-09 03:42:00 +08:00
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/* Describe the register's location. Generic dummy frames always
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have the register value in an ``expression''. */
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*optimized = 0;
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*lvalp = not_lval;
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*addrp = 0;
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*realnum = -1;
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/* If needed, find and return the value of the register. */
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if (bufferp != NULL)
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{
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/* Return the actual value. */
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/* Use the regcache_cooked_read() method so that it, on the fly,
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constructs either a raw or pseudo register from the raw
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register cache. */
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2004-08-03 00:07:31 +08:00
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regcache_cooked_read (cache->prev_regcache, regnum, bufferp);
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2002-11-09 03:42:00 +08:00
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}
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}
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2003-03-17 22:23:50 +08:00
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/* Assuming that THIS frame is a dummy (remember, the NEXT and not
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THIS frame is passed in), return the ID of THIS frame. That ID is
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determined by examining the NEXT frame's unwound registers using
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the method unwind_dummy_id(). As a side effect, THIS dummy frame's
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dummy cache is located and and saved in THIS_PROLOGUE_CACHE. */
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
(struct frame_unwind): Declare opaque.
(dummy_frame_p): Declare function.
* dummy-frame.c (dummy_frame_id_unwind): Make static.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
* dummy-frame.c: Include "frame-unwind.h".
(dummy_frame_p): New function.
(dummy_frame_unwind): New variable.
* frame.c: Include "frame-unwind.h".
(frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update
to use the new unwind field.
(set_unwind_by_pc): Delete function.
(create_new_frame, get_prev_frame): Set unwind field using
frame_unwind_find_by_pc.
(trad_frame_unwind, trad_frame_unwinder): New variables.
* frame.h (trad_frame_unwind): Declare variable.
(frame_id_unwind_ftype): Delete declaration.
(frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto.
(struct frame_unwind): Declare opaque.
(struct frame_info): Replace the fields id_unwind, pc_unwind and
register_unwind with a single unwind pointer.
* frame-unwind.h, frame-unwind.c: New files.
* Makefile.in (SFILES): Add frame-unwind.c.
(frame_unwind_h): Define.
(COMMON_OBS): Add frame-unwind.o.
(frame-unwind.o): Specify dependencies.
(frame.o, dummy-frame.o): Update dependencies.
2003-01-19 01:25:23 +08:00
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static void
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2003-03-17 22:23:50 +08:00
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dummy_frame_this_id (struct frame_info *next_frame,
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void **this_prologue_cache,
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struct frame_id *this_id)
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2002-12-14 00:40:25 +08:00
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{
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2004-08-03 00:07:31 +08:00
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/* The dummy-frame sniffer always fills in the cache. */
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struct dummy_frame_cache *cache = (*this_prologue_cache);
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gdb_assert (cache != NULL);
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(*this_id) = cache->this_id;
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2002-12-14 00:40:25 +08:00
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}
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2004-08-03 00:07:31 +08:00
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static const struct frame_unwind dummy_frame_unwinder =
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
(struct frame_unwind): Declare opaque.
(dummy_frame_p): Declare function.
* dummy-frame.c (dummy_frame_id_unwind): Make static.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
* dummy-frame.c: Include "frame-unwind.h".
(dummy_frame_p): New function.
(dummy_frame_unwind): New variable.
* frame.c: Include "frame-unwind.h".
(frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update
to use the new unwind field.
(set_unwind_by_pc): Delete function.
(create_new_frame, get_prev_frame): Set unwind field using
frame_unwind_find_by_pc.
(trad_frame_unwind, trad_frame_unwinder): New variables.
* frame.h (trad_frame_unwind): Declare variable.
(frame_id_unwind_ftype): Delete declaration.
(frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto.
(struct frame_unwind): Declare opaque.
(struct frame_info): Replace the fields id_unwind, pc_unwind and
register_unwind with a single unwind pointer.
* frame-unwind.h, frame-unwind.c: New files.
* Makefile.in (SFILES): Add frame-unwind.c.
(frame_unwind_h): Define.
(COMMON_OBS): Add frame-unwind.o.
(frame-unwind.o): Specify dependencies.
(frame.o, dummy-frame.o): Update dependencies.
2003-01-19 01:25:23 +08:00
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{
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2003-04-05 11:56:00 +08:00
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DUMMY_FRAME,
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2003-03-17 22:23:50 +08:00
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dummy_frame_this_id,
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2004-08-03 00:07:31 +08:00
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dummy_frame_prev_register,
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NULL,
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dummy_frame_sniffer,
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2003-01-18 Andrew Cagney <ac131313@redhat.com>
* dummy-frame.h (dummy_frame_id_unwind): Delete declaration.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
(struct frame_unwind): Declare opaque.
(dummy_frame_p): Declare function.
* dummy-frame.c (dummy_frame_id_unwind): Make static.
(dummy_frame_pc_unwind, dummy_frame_register_unwind): Ditto.
* dummy-frame.c: Include "frame-unwind.h".
(dummy_frame_p): New function.
(dummy_frame_unwind): New variable.
* frame.c: Include "frame-unwind.h".
(frame_pc_unwind, frame_id_unwind, frame_register_unwind): Update
to use the new unwind field.
(set_unwind_by_pc): Delete function.
(create_new_frame, get_prev_frame): Set unwind field using
frame_unwind_find_by_pc.
(trad_frame_unwind, trad_frame_unwinder): New variables.
* frame.h (trad_frame_unwind): Declare variable.
(frame_id_unwind_ftype): Delete declaration.
(frame_pc_unwind_ftype, frame_register_unwind_ftype): Ditto.
(struct frame_unwind): Declare opaque.
(struct frame_info): Replace the fields id_unwind, pc_unwind and
register_unwind with a single unwind pointer.
* frame-unwind.h, frame-unwind.c: New files.
* Makefile.in (SFILES): Add frame-unwind.c.
(frame_unwind_h): Define.
(COMMON_OBS): Add frame-unwind.o.
(frame-unwind.o): Specify dependencies.
(frame.o, dummy-frame.o): Update dependencies.
2003-01-19 01:25:23 +08:00
|
|
|
};
|
|
|
|
|
2004-08-03 00:07:31 +08:00
|
|
|
const struct frame_unwind *const dummy_frame_unwind = {
|
|
|
|
&dummy_frame_unwinder
|
|
|
|
};
|
2003-05-06 02:33:11 +08:00
|
|
|
|
|
|
|
static void
|
|
|
|
fprint_dummy_frames (struct ui_file *file)
|
|
|
|
{
|
|
|
|
struct dummy_frame *s;
|
|
|
|
for (s = dummy_frame_stack; s != NULL; s = s->next)
|
|
|
|
{
|
|
|
|
gdb_print_host_address (s, file);
|
|
|
|
fprintf_unfiltered (file, ":");
|
|
|
|
fprintf_unfiltered (file, " id=");
|
|
|
|
fprint_frame_id (file, s->id);
|
|
|
|
fprintf_unfiltered (file, "\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
maintenance_print_dummy_frames (char *args, int from_tty)
|
|
|
|
{
|
|
|
|
if (args == NULL)
|
|
|
|
fprint_dummy_frames (gdb_stdout);
|
|
|
|
else
|
|
|
|
{
|
|
|
|
struct ui_file *file = gdb_fopen (args, "w");
|
|
|
|
if (file == NULL)
|
2005-02-11 Andrew Cagney <cagney@gnu.org>
Mark up error_no_arg, query, perror_with_name, complaint, and
internal_error.
* breakpoint.c, cp-abi.c, cp-namespace.c, cp-support.c: Update.
* cris-tdep.c, dbxread.c, dictionary.c, dsrec.c: Update.
* dummy-frame.c, dve3900-rom.c, dwarf2-frame.c, dwarf2expr.c: Update.
* dwarf2read.c, dwarfread.c, elfread.c, event-loop.c: Update.
* exceptions.c, exec.c, f-lang.c, findvar.c, fork-child.c: Update.
* frame-unwind.c, frame.c, frv-linux-tdep.c, frv-tdep.c: Update.
* gdb_assert.h, gdbarch.c, gdbtypes.c, gnu-nat.c: Update.
* go32-nat.c, hppa-tdep.c, hppabsd-nat.c, hpread.c: Update.
* i386-linux-nat.c, i386-nat.c, i386-tdep.c, i386bsd-nat.c: Update.
* i386fbsd-nat.c, inf-ptrace.c, inf-ttrace.c, infcall.c: Update.
* infcmd.c, inflow.c, infptrace.c, infrun.c, inftarg.c: Update.
* interps.c, language.c, linespec.c, linux-nat.c: Update.
* m32r-linux-nat.c, m68k-tdep.c, m68kbsd-nat.c: Update.
* m68klinux-nat.c, m88kbsd-nat.c, macroexp.c, macroscope.c: Update.
* macrotab.c, maint.c, mdebugread.c, memattr.c: Update.
* mips-linux-tdep.c, mips-tdep.c, mips64obsd-nat.c: Update.
* mipsnbsd-nat.c, mn10300-tdep.c, monitor.c, nto-procfs.c: Update.
* objc-lang.c, objfiles.c, objfiles.h, ocd.c, osabi.c: Update.
* parse.c, ppc-bdm.c, ppc-linux-nat.c, ppc-sysv-tdep.c: Update.
* ppcnbsd-nat.c, ppcobsd-nat.c, printcmd.c, procfs.c: Update.
* regcache.c, reggroups.c, remote-e7000.c, remote-mips.c: Update.
* remote-rdp.c, remote-sds.c, remote-sim.c, remote-st.c: Update.
* remote-utils.c, remote.c, rs6000-nat.c, rs6000-tdep.c: Update.
* s390-nat.c, s390-tdep.c, sentinel-frame.c, serial.c: Update.
* sh-tdep.c, sh3-rom.c, sh64-tdep.c, shnbsd-nat.c: Update.
* solib-aix5.c, solib-svr4.c, solib.c, source.c: Update.
* sparc-nat.c, stabsread.c, stack.c, symfile.c, symtab.c: Update.
* symtab.h, target.c, tracepoint.c, ui-file.c, ui-out.c: Update.
* utils.c, valops.c, valprint.c, vax-nat.c, vaxbsd-nat.c: Update.
* win32-nat.c, xcoffread.c, xstormy16-tdep.c: Update.
* cli/cli-cmds.c, cli/cli-logging.c, cli/cli-script.c: Update.
* cli/cli-setshow.c, mi/mi-cmd-break.c, mi/mi-cmds.c: Update.
* mi/mi-console.c, mi/mi-getopt.c, mi/mi-out.c: Update.
* tui/tui-file.c, tui/tui-interp.c: Update.
2005-02-12 02:13:55 +08:00
|
|
|
perror_with_name (_("maintenance print dummy-frames"));
|
2003-05-06 02:33:11 +08:00
|
|
|
fprint_dummy_frames (file);
|
|
|
|
ui_file_delete (file);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
extern void _initialize_dummy_frame (void);
|
|
|
|
|
|
|
|
void
|
|
|
|
_initialize_dummy_frame (void)
|
|
|
|
{
|
|
|
|
add_cmd ("dummy-frames", class_maintenance, maintenance_print_dummy_frames,
|
2005-02-14 Andrew Cagney <cagney@gnu.org>
Mark up add_cmd.
* arch-utils.c, avr-tdep.c, breakpoint.c, corefile.c: Update.
* cp-abi.c, cp-namespace.c, cp-support.c, dummy-frame.c: Update.
* exec.c, gnu-nat.c, go32-nat.c, hppa-tdep.c, infcmd.c: Update.
* infrun.c, interps.c, macrocmd.c, maint.c, memattr.c: Update.
* mips-tdep.c, ocd.c, osabi.c, printcmd.c, regcache.c: Update.
* reggroups.c, remote-fileio.c, remote-rdi.c, remote.c: Update.
* sol-thread.c, source.c, stack.c, symfile-mem.c: Update.
* symfile.c, thread.c, tracepoint.c, valprint.c, value.c: Update.
* win32-nat.c, cli/cli-cmds.c, cli/cli-dump.c: Update.
* cli/cli-logging.c, tui/tui-regs.c: Update.
2005-02-15 02:10:11 +08:00
|
|
|
_("Print the contents of the internal dummy-frame stack."),
|
2003-05-06 02:33:11 +08:00
|
|
|
&maintenanceprintlist);
|
|
|
|
|
|
|
|
}
|