mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-04 10:24:13 +00:00
5e0f933e90
* dummy-frame.c (pc_in_dummy_frame): New function. (generic_pc_in_call_dummy): Call pc_in_dummy_frame. (find_dummy_frame): Update comment. (generic_pop_current_frame): Use get_frame_type. * dummy-frame.h (pc_in_dummy_frame): Declare. * frame.c (set_unwind_by_pc): Use pc_in_dummy_frame. (create_new_frame): Use pc_in_dummy_frame. (get_prev_frame): Use pc_in_dummy_frame. (frame_saved_regs_register_unwind): Use get_prev_frame. (deprecated_generic_get_saved_register): Use get_prev_frame.
97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/* Code dealing with dummy stack frames, for GDB, the GNU debugger.
|
|
|
|
Copyright 2002 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. */
|
|
|
|
#if !defined (DUMMY_FRAME_H)
|
|
#define DUMMY_FRAME_H 1
|
|
|
|
struct frame_info;
|
|
struct regcache;
|
|
|
|
/* GENERIC DUMMY FRAMES
|
|
|
|
The following code serves to maintain the dummy stack frames for
|
|
inferior function calls (ie. when gdb calls into the inferior via
|
|
call_function_by_hand). This code saves the machine state before
|
|
the call in host memory, so we must maintain an independent stack
|
|
and keep it consistant etc. I am attempting to make this code
|
|
generic enough to be used by many targets.
|
|
|
|
The cheapest and most generic way to do CALL_DUMMY on a new target
|
|
is probably to define CALL_DUMMY to be empty, CALL_DUMMY_LENGTH to
|
|
zero, and CALL_DUMMY_LOCATION to AT_ENTRY. Then you must remember
|
|
to define PUSH_RETURN_ADDRESS, because no call instruction will be
|
|
being executed by the target. Also FRAME_CHAIN_VALID as
|
|
generic_{file,func}_frame_chain_valid and FIX_CALL_DUMMY as
|
|
generic_fix_call_dummy. */
|
|
|
|
/* Assuming that FRAME is a dummy, return a register value for the
|
|
previous frame. */
|
|
|
|
extern void dummy_frame_register_unwind (struct frame_info *frame,
|
|
void **unwind_cache,
|
|
int regnum,
|
|
int *optimized,
|
|
enum lval_type *lvalp,
|
|
CORE_ADDR *addrp,
|
|
int *realnump,
|
|
void *valuep);
|
|
|
|
/* Assuming that FRAME is a dummy, return the resume address for the
|
|
previous frame. */
|
|
|
|
extern CORE_ADDR dummy_frame_pc_unwind (struct frame_info *frame,
|
|
void **unwind_cache);
|
|
|
|
/* Does the PC fall in a dummy frame?
|
|
|
|
This function is used by "frame.c" when creating a new `struct
|
|
frame_info'.
|
|
|
|
Note that there is also very similar code in breakpoint.c (where
|
|
the bpstat stop reason is computed). It is looking for a PC
|
|
falling on a dummy_frame breakpoint. Perhaphs this, and that code
|
|
should be combined?
|
|
|
|
Architecture dependant code, that has access to a frame, should not
|
|
use this function. Instead (get_frame_type() == DUMMY_FRAME)
|
|
should be used.
|
|
|
|
Hmm, but what about threads? When the dummy-frame code tries to
|
|
relocate a dummy frame's saved registers it definitly needs to
|
|
differentiate between threads (otherwize it will do things like
|
|
clean-up the wrong threads frames). However, when just trying to
|
|
identify a dummy-frame that shouldn't matter. The wost that can
|
|
happen is that a thread is marked as sitting in a dummy frame when,
|
|
in reality, its corrupted its stack, to the point that a PC is
|
|
pointing into a dummy frame. */
|
|
|
|
extern int pc_in_dummy_frame (CORE_ADDR pc);
|
|
|
|
/* Return the regcache that belongs to the dummy-frame identifed by PC
|
|
and FP, or NULL if no such frame exists. */
|
|
/* FIXME: cagney/2002-11-08: The function only exists because of
|
|
deprecated_generic_get_saved_register. Eliminate that function and
|
|
this, to, can go. */
|
|
|
|
extern struct regcache *generic_find_dummy_frame (CORE_ADDR pc,
|
|
CORE_ADDR fp);
|
|
#endif /* !defined (DUMMY_FRAME_H) */
|