1 /* Definitions for dealing with stack frames, for GDB, the GNU debugger.
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #if !defined (FRAME_H)
26 struct symtab_and_line
;
31 /* A legacy unwinder to prop up architectures using the old style
33 extern const struct frame_unwind
*legacy_saved_regs_unwind
;
35 /* The frame object. */
39 /* The frame object's ID. This provides a per-frame unique identifier
40 that can be used to relocate a `struct frame_info' after a target
41 resume or a frame cache destruct. It of course assumes that the
42 inferior hasn't unwound the stack past that frame. */
46 /* The frame's address. This should be constant through out the
47 lifetime of a frame. */
48 /* NOTE: cagney/2002-11-16: The ia64 has two stacks and hence two
49 frame bases. This will need to be expanded to accomodate that. */
51 /* The frame's current PC. While the PC within the function may
52 change, the function that contains the PC does not. Should this
53 instead be the frame's function? */
57 /* Methods for constructing and comparing Frame IDs.
59 NOTE: Given frameless functions A and B, where A calls B (and hence
60 B is inner-to A). The relationships: !eq(A,B); !eq(B,A);
61 !inner(A,B); !inner(B,A); all hold. This is because, while B is
62 inner to A, B is not strictly inner to A (being frameless, they
63 have the same .base value). */
65 /* For convenience. All fields are zero. */
66 extern const struct frame_id null_frame_id
;
68 /* Construct a frame ID. The second parameter isn't yet well defined.
69 It might be the containing function, or the resume PC (see comment
70 above in `struct frame_id')? A func/pc of zero indicates a
71 wildcard (i.e., do not use func in frame ID comparisons). */
72 extern struct frame_id
frame_id_build (CORE_ADDR base
,
73 CORE_ADDR func_or_pc
);
75 /* Returns non-zero when L is a valid frame (a valid frame has a
77 extern int frame_id_p (struct frame_id l
);
79 /* Returns non-zero when L and R identify the same frame, or, if
80 either L or R have a zero .func, then the same frame base. */
81 extern int frame_id_eq (struct frame_id l
, struct frame_id r
);
83 /* Returns non-zero when L is strictly inner-than R (they have
84 different frame .bases). Neither L, nor R can be `null'. See note
85 above about frameless functions. */
86 extern int frame_id_inner (struct frame_id l
, struct frame_id r
);
89 /* For every stopped thread, GDB tracks two frames: current and
90 selected. Current frame is the inner most frame of the selected
91 thread. Selected frame is the one being examined by the the GDB
92 CLI (selected using `up', `down', ...). The frames are created
93 on-demand (via get_prev_frame()) and then held in a frame cache. */
94 /* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
95 sequence: `thread 1; up; thread 2; thread 1' you loose thread 1's
96 selected frame. At present GDB only tracks the selected frame of
97 the current thread. But be warned, that might change. */
98 /* FIXME: cagney/2002-11-14: At any time, only one thread's selected
99 and current frame can be active. Switching threads causes gdb to
100 discard all that cached frame information. Ulgh! Instead, current
101 and selected frame should be bound to a thread. */
103 /* On demand, create the inner most frame using information found in
104 the inferior. If the inner most frame can't be created, throw an
106 extern struct frame_info
*get_current_frame (void);
108 /* Invalidates the frame cache (this function should have been called
109 invalidate_cached_frames).
111 FIXME: cagney/2002-11-28: The only difference between
112 flush_cached_frames() and reinit_frame_cache() is that the latter
113 explicitly sets the selected frame back to the current frame there
114 isn't any real difference (except that one delays the selection of
115 a new frame). Code can instead simply rely on get_selected_frame()
116 to reinit's the selected frame as needed. As for invalidating the
117 cache, there should be two methods one that reverts the thread's
118 selected frame back to current frame (for when the inferior
119 resumes) and one that does not (for when the user modifies the
120 target invalidating the frame cache). */
121 extern void flush_cached_frames (void);
122 extern void reinit_frame_cache (void);
124 /* On demand, create the selected frame and then return it. If the
125 selected frame can not be created, this function throws an error. */
126 /* FIXME: cagney/2002-11-28: At present, when there is no selected
127 frame, this function always returns the current (inner most) frame.
128 It should instead, when a thread has previously had its frame
129 selected (but not resumed) and the frame cache invalidated, find
130 and then return that thread's previously selected frame. */
131 extern struct frame_info
*get_selected_frame (void);
133 /* Select a specific frame. NULL, apparently implies re-select the
135 extern void select_frame (struct frame_info
*);
137 /* Given a FRAME, return the next (more inner, younger) or previous
138 (more outer, older) frame. */
139 extern struct frame_info
*get_prev_frame (struct frame_info
*);
140 extern struct frame_info
*get_next_frame (struct frame_info
*);
142 /* Given a frame's ID, relocate the frame. Returns NULL if the frame
144 extern struct frame_info
*frame_find_by_id (struct frame_id id
);
146 /* Base attributes of a frame: */
148 /* The frame's `resume' address. Where the program will resume in
150 extern CORE_ADDR
get_frame_pc (struct frame_info
*);
152 /* Following on from the `resume' address. Return the entry point
153 address of the function containing that resume address, or zero if
154 that function isn't known. */
155 extern CORE_ADDR
frame_func_unwind (struct frame_info
*fi
);
156 extern CORE_ADDR
get_frame_func (struct frame_info
*fi
);
158 /* Closely related to the resume address, various symbol table
159 attributes that are determined by the PC. Note that for a normal
160 frame, the PC refers to the resume address after the return, and
161 not the call instruction. In such a case, the address is adjusted
162 so that it (approximatly) identifies the call site (and not return
165 NOTE: cagney/2002-11-28: The frame cache could be used to cache the
166 computed value. Working on the assumption that the bottle-neck is
167 in the single step code, and that code causes the frame cache to be
168 constantly flushed, caching things in a frame is probably of little
169 benefit. As they say `show us the numbers'.
171 NOTE: cagney/2002-11-28: Plenty more where this one came from:
172 find_frame_block(), find_frame_partial_function(),
173 find_frame_symtab(), find_frame_function(). Each will need to be
174 carefully considered to determine if the real intent was for it to
175 apply to the PC or the adjusted PC. */
176 extern void find_frame_sal (struct frame_info
*frame
,
177 struct symtab_and_line
*sal
);
179 /* Return the frame base (what ever that is) (DEPRECATED).
181 Old code was trying to use this single method for two conflicting
182 purposes. Such code needs to be updated to use either of:
184 get_frame_id: A low level frame unique identifier, that consists of
185 both a stack and a function address, that can be used to uniquely
186 identify a frame. This value is determined by the frame's
187 low-level unwinder, the stack part [typically] being the
188 top-of-stack of the previous frame, and the function part being the
189 function's start address. Since the correct identification of a
190 frameless function requires both the a stack and function address,
191 the old get_frame_base method was not sufficient.
193 get_frame_base_address: get_frame_locals_address:
194 get_frame_args_address: A set of high-level debug-info dependant
195 addresses that fall within the frame. These addresses almost
196 certainly will not match the stack address part of a frame ID (as
197 returned by get_frame_base). */
199 extern CORE_ADDR
get_frame_base (struct frame_info
*);
201 /* Return the per-frame unique identifer. Can be used to relocate a
202 frame after a frame cache flush (and other similar operations). If
203 FI is NULL, return the null_frame_id. */
204 extern struct frame_id
get_frame_id (struct frame_info
*fi
);
206 /* Assuming that a frame is `normal', return its base-address, or 0 if
207 the information isn't available. NOTE: This address is really only
208 meaningful to the frame's high-level debug info. */
209 extern CORE_ADDR
get_frame_base_address (struct frame_info
*);
211 /* Assuming that a frame is `normal', return the base-address of the
212 local variables, or 0 if the information isn't available. NOTE:
213 This address is really only meaningful to the frame's high-level
214 debug info. Typically, the argument and locals share a single
216 extern CORE_ADDR
get_frame_locals_address (struct frame_info
*);
218 /* Assuming that a frame is `normal', return the base-address of the
219 parameter list, or 0 if that information isn't available. NOTE:
220 This address is really only meaningful to the frame's high-level
221 debug info. Typically, the argument and locals share a single
223 extern CORE_ADDR
get_frame_args_address (struct frame_info
*);
225 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
226 for an invalid frame). */
227 extern int frame_relative_level (struct frame_info
*fi
);
229 /* Return the frame's type. Some are real, some are signal
230 trampolines, and some are completly artificial (dummy). */
234 /* The frame's type hasn't yet been defined. This is a catch-all
235 for legacy code that uses really strange technicques, such as
236 deprecated_set_frame_type, to set the frame's type. New code
237 should not use this value. */
239 /* A true stack frame, created by the target program during normal
242 /* A fake frame, created by GDB when performing an inferior function
245 /* In a signal handler, various OSs handle this in various ways.
246 The main thing is that the frame may be far from normal. */
249 extern enum frame_type
get_frame_type (struct frame_info
*);
251 /* FIXME: cagney/2002-11-10: Some targets want to directly mark a
252 frame as being of a specific type. This shouldn't be necessary.
253 PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
254 DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
255 the real problem here is that get_prev_frame() only sets
256 initialized after DEPRECATED_INIT_EXTRA_FRAME_INFO as been called.
257 Consequently, some targets found that the frame's type was wrong
258 and tried to fix it. The correct fix is to modify get_prev_frame()
259 so that it initializes the frame's type before calling any other
261 extern void deprecated_set_frame_type (struct frame_info
*,
262 enum frame_type type
);
264 /* Unwind the stack frame so that the value of REGNUM, in the previous
265 (up, older) frame is returned. If VALUEP is NULL, don't
266 fetch/compute the value. Instead just return the location of the
268 extern void frame_register_unwind (struct frame_info
*frame
, int regnum
,
269 int *optimizedp
, enum lval_type
*lvalp
,
270 CORE_ADDR
*addrp
, int *realnump
,
273 /* More convenient interface to frame_register_unwind(). */
274 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
275 be changed to return an indication that the read succeeded. */
277 extern void frame_unwind_register (struct frame_info
*frame
,
278 int regnum
, void *buf
);
280 extern void frame_unwind_signed_register (struct frame_info
*frame
,
281 int regnum
, LONGEST
*val
);
283 extern void frame_unwind_unsigned_register (struct frame_info
*frame
,
284 int regnum
, ULONGEST
*val
);
286 /* Get the value of the register that belongs to this FRAME. This
287 function is a wrapper to the call sequence ``frame_unwind_register
288 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
289 VALUEP is NULL, the registers value is not fetched/computed. */
291 extern void frame_register (struct frame_info
*frame
, int regnum
,
292 int *optimizedp
, enum lval_type
*lvalp
,
293 CORE_ADDR
*addrp
, int *realnump
,
296 /* More convenient interface to frame_register(). */
297 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
298 be changed to return an indication that the read succeeded. */
300 extern void frame_read_register (struct frame_info
*frame
, int regnum
,
303 extern void frame_read_signed_register (struct frame_info
*frame
,
304 int regnum
, LONGEST
*val
);
306 extern void frame_read_unsigned_register (struct frame_info
*frame
,
307 int regnum
, ULONGEST
*val
);
309 /* Map between a frame register number and its name. A frame register
310 space is a superset of the cooked register space --- it also
311 includes builtin registers. If NAMELEN is negative, use the NAME's
312 length when doing the comparison. */
314 extern int frame_map_name_to_regnum (const char *name
, int namelen
);
315 extern const char *frame_map_regnum_to_name (int regnum
);
317 /* Unwind the PC. Strictly speaking return the resume address of the
318 calling frame. For GDB, `pc' is the resume address and not a
319 specific register. */
321 extern CORE_ADDR
frame_pc_unwind (struct frame_info
*frame
);
323 /* Discard the specified frame. Restoring the registers to the state
325 extern void frame_pop (struct frame_info
*frame
);
327 /* We keep a cache of stack frames, each of which is a "struct
328 frame_info". The innermost one gets allocated (in
329 wait_for_inferior) each time the inferior stops; current_frame
330 points to it. Additional frames get allocated (in
331 get_prev_frame) as needed, and are chained through the next
332 and prev fields. Any time that the frame cache becomes invalid
333 (most notably when we execute something, but also if we change how
334 we interpret the frames (e.g. "set heuristic-fence-post" in
335 mips-tdep.c, or anything which reads new symbols)), we should call
336 reinit_frame_cache. */
340 /* Address at which execution is occurring in this frame.
341 For the innermost frame, it's the current pc.
342 For other frames, it is a pc saved in the next frame. */
345 /* Level of this frame. The inner-most (youngest) frame is at
346 level 0. As you move towards the outer-most (oldest) frame,
347 the level increases. This is a cached value. It could just as
348 easily be computed by counting back from the selected frame to
349 the inner most frame. */
350 /* NOTE: cagney/2002-04-05: Perhaphs a level of ``-1'' should be
351 reserved to indicate a bogus frame - one that has been created
352 just to keep GDB happy (GDB always needs a frame). For the
353 moment leave this as speculation. */
356 /* The frame's type. */
357 /* FIXME: cagney/2003-04-02: Should instead be returning
358 ->unwind->type. Unfortunatly, legacy code is still explicitly
359 setting the type using the method deprecated_set_frame_type.
360 Eliminate that method and this field can be eliminated. */
361 enum frame_type type
;
363 /* For each register, address of where it was saved on entry to
364 the frame, or zero if it was not saved on entry to this frame.
365 This includes special registers such as pc and fp saved in
366 special ways in the stack frame. The SP_REGNUM is even more
367 special, the address here is the sp for the previous frame, not
368 the address where the sp was saved. */
369 /* Allocated by frame_saved_regs_zalloc () which is called /
370 initialized by DEPRECATED_FRAME_INIT_SAVED_REGS(). */
371 CORE_ADDR
*saved_regs
; /*NUM_REGS + NUM_PSEUDO_REGS*/
373 /* Anything extra for this structure that may have been defined
374 in the machine dependent files. */
375 /* Allocated by frame_extra_info_zalloc () which is called /
376 initialized by DEPRECATED_INIT_EXTRA_FRAME_INFO */
377 struct frame_extra_info
*extra_info
;
379 /* If dwarf2 unwind frame informations is used, this structure holds all
380 related unwind data. */
381 struct context
*context
;
383 /* The frame's low-level unwinder and corresponding cache. The
384 low-level unwinder is responsible for unwinding register values
385 for the previous frame. The low-level unwind methods are
386 selected based on the presence, or otherwize, of register
387 unwind information such as CFI. */
388 void *prologue_cache
;
389 const struct frame_unwind
*unwind
;
391 /* Cached copy of the previous frame's resume address. */
392 int pc_unwind_cache_p
;
393 CORE_ADDR pc_unwind_cache
;
395 /* Cached copy of the previous frame's function address. */
402 /* This frame's ID. Note that the frame's ID, base and PC contain
403 redundant information. */
407 /* The frame's high-level base methods, and corresponding cache.
408 The high level base methods are selected based on the frame's
410 const struct frame_base
*base
;
413 /* Pointers to the next (down, inner, younger) and previous (up,
414 outer, older) frame_info's in the frame cache. */
415 struct frame_info
*next
; /* down, inner, younger */
417 struct frame_info
*prev
; /* up, outer, older */
420 /* Values for the source flag to be used in print_frame_info_base(). */
423 /* Print only the source line, like in stepi. */
425 /* Print only the location, i.e. level, address (sometimes)
426 function, args, file, line, line num. */
428 /* Print both of the above. */
430 /* Print location only, but always include the address. */
434 /* Allocate additional space for appendices to a struct frame_info.
435 NOTE: Much of GDB's code works on the assumption that the allocated
436 saved_regs[] array is the size specified below. If you try to make
437 that array smaller, GDB will happily walk off its end. */
439 #ifdef SIZEOF_FRAME_SAVED_REGS
440 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
442 #define SIZEOF_FRAME_SAVED_REGS \
443 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
445 /* Allocate zero initialized memory from the frame cache obstack.
446 Appendices to the frame info (such as the unwind cache) should
447 allocate memory using this method. */
449 extern void *frame_obstack_zalloc (unsigned long size
);
450 #define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
452 /* If legacy_frame_chain_valid() returns zero it means that the given
453 frame is the outermost one and has no caller.
455 This method has been superseeded by the per-architecture
456 frame_unwind_pc() (returns 0 to indicate an invalid return address)
457 and per-frame this_id() (returns a NULL frame ID to indicate an
459 extern int legacy_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
461 extern void generic_save_dummy_frame_tos (CORE_ADDR sp
);
463 extern struct block
*get_frame_block (struct frame_info
*,
464 CORE_ADDR
*addr_in_block
);
466 /* Return the `struct block' that belongs to the selected thread's
467 selected frame. If the inferior has no state, return NULL.
469 NOTE: cagney/2002-11-29:
471 No state? Does the inferior have any execution state (a core file
472 does, an executable does not). At present the code tests
473 `target_has_stack' but I'm left wondering if it should test
474 `target_has_registers' or, even, a merged target_has_state.
476 Should it look at the most recently specified SAL? If the target
477 has no state, should this function try to extract a block from the
478 most recently selected SAL? That way `list foo' would give it some
479 sort of reference point. Then again, perhaphs that would confuse
482 Calls to this function can be broken down into two categories: Code
483 that uses the selected block as an additional, but optional, data
484 point; Code that uses the selected block as a prop, when it should
485 have the relevant frame/block/pc explicitly passed in.
487 The latter can be eliminated by correctly parameterizing the code,
488 the former though is more interesting. Per the "address" command,
489 it occures in the CLI code and makes it possible for commands to
490 work, even when the inferior has no state. */
492 extern struct block
*get_selected_block (CORE_ADDR
*addr_in_block
);
494 extern struct symbol
*get_frame_function (struct frame_info
*);
496 extern CORE_ADDR
frame_address_in_block (struct frame_info
*);
498 extern CORE_ADDR
get_pc_function_start (CORE_ADDR
);
500 extern int frameless_look_for_prologue (struct frame_info
*);
502 extern void print_frame_args (struct symbol
*, struct frame_info
*,
503 int, struct ui_file
*);
505 extern struct frame_info
*find_relative_frame (struct frame_info
*, int *);
507 extern void show_and_print_stack_frame (struct frame_info
*fi
, int level
,
510 extern void print_stack_frame (struct frame_info
*, int, int);
512 extern void show_stack_frame (struct frame_info
*);
514 extern void print_frame_info (struct frame_info
*, int, int, int);
516 extern void show_frame_info (struct frame_info
*, int, int, int);
518 extern struct frame_info
*block_innermost_frame (struct block
*);
520 /* NOTE: cagney/2002-09-13: There is no need for this function.
521 Instead either of frame_unwind_signed_register() or
522 frame_unwind_unsigned_register() can be used. */
523 extern CORE_ADDR
deprecated_read_register_dummy (CORE_ADDR pc
,
525 extern void generic_push_dummy_frame (void);
526 extern void generic_pop_current_frame (void (*)(struct frame_info
*));
527 extern void generic_pop_dummy_frame (void);
529 extern int generic_pc_in_call_dummy (CORE_ADDR pc
,
530 CORE_ADDR sp
, CORE_ADDR fp
);
532 /* NOTE: cagney/2002-06-26: Targets should no longer use this
533 function. Instead, the contents of a dummy frames registers can be
534 obtained by applying: frame_register_unwind to the dummy frame; or
535 frame_register_unwind() to the next outer frame. */
537 extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc
, CORE_ADDR fp
);
539 void generic_unwind_get_saved_register (char *raw_buffer
,
542 struct frame_info
*frame
,
544 enum lval_type
*lvalp
);
546 /* The function generic_get_saved_register() has been made obsolete.
547 DEPRECATED_GET_SAVED_REGISTER now defaults to the recursive
548 equivalent - generic_unwind_get_saved_register() - so there is no
549 need to even set DEPRECATED_GET_SAVED_REGISTER. Architectures that
550 need to override the register unwind mechanism should modify
552 extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR
*,
553 struct frame_info
*, int,
556 extern void generic_save_call_dummy_addr (CORE_ADDR lo
, CORE_ADDR hi
);
558 /* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
559 function called frame_read_register_p(). This slightly weird (and
560 older) variant of frame_read_register() returns zero (indicating
561 the register is unavailable) if either: the register isn't cached;
562 or the register has been optimized out. Problem is, neither check
563 is exactly correct. A register can't be optimized out (it may not
564 have been saved as part of a function call); The fact that a
565 register isn't in the register cache doesn't mean that the register
566 isn't available (it could have been fetched from memory). */
568 extern int frame_register_read (struct frame_info
*frame
, int regnum
,
572 extern void args_info (char *, int);
574 extern void locals_info (char *, int);
576 extern void (*selected_frame_level_changed_hook
) (int);
578 extern void return_command (char *, int);
581 /* NOTE: cagney/2002-11-27:
583 You might think that the below global can simply be replaced by a
584 call to either get_selected_frame() or select_frame().
586 Unfortunatly, it isn't that easy.
588 The relevant code needs to be audited to determine if it is
589 possible (or pratical) to instead pass the applicable frame in as a
590 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
591 the deprecated_selected_frame global, while its replacement,
592 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
593 The only real exceptions occure at the edge (in the CLI code) where
594 user commands need to pick up the selected frame before proceeding.
596 This is important. GDB is trying to stamp out the hack:
598 saved_frame = deprecated_selected_frame;
599 deprecated_selected_frame = ...;
600 hack_using_global_selected_frame ();
601 deprecated_selected_frame = saved_frame;
605 extern struct frame_info
*deprecated_selected_frame
;
608 /* Create a frame using the specified BASE and PC. */
610 extern struct frame_info
*create_new_frame (CORE_ADDR base
, CORE_ADDR pc
);
613 /* Create/access the frame's `extra info'. The extra info is used by
614 older code to store information such as the analyzed prologue. The
615 zalloc() should only be called by the INIT_EXTRA_INFO method. */
617 extern struct frame_extra_info
*frame_extra_info_zalloc (struct frame_info
*fi
,
619 extern struct frame_extra_info
*get_frame_extra_info (struct frame_info
*fi
);
621 /* Create/access the frame's `saved_regs'. The saved regs are used by
622 older code to store the address of each register (except for
623 SP_REGNUM where the value of the register in the previous frame is
625 extern CORE_ADDR
*frame_saved_regs_zalloc (struct frame_info
*);
626 extern CORE_ADDR
*get_frame_saved_regs (struct frame_info
*);
628 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
629 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
630 the initial frame create. This puts things back in sync. */
631 extern void deprecated_update_frame_pc_hack (struct frame_info
*frame
,
634 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
635 more exact, whas that initial guess at the frame's base as returned
636 by read_fp() wrong. If it was, fix it. This shouldn't be
637 necessary since the code should be getting the frame's base correct
639 extern void deprecated_update_frame_base_hack (struct frame_info
*frame
,
642 /* FIXME: cagney/2003-01-04: Explicitly set the frame's saved_regs
643 and/or extra_info. Target code is allocating a fake frame and than
644 initializing that to get around the problem of, when creating the
645 inner most frame, there is no where to cache information such as
646 the prologue analysis. This is fixed by the new unwind mechanism -
647 even the inner most frame has somewhere to store things like the
648 prolog analysis (or at least will once the frame overhaul is
650 extern void deprecated_set_frame_saved_regs_hack (struct frame_info
*frame
,
651 CORE_ADDR
*saved_regs
);
652 extern void deprecated_set_frame_extra_info_hack (struct frame_info
*frame
,
653 struct frame_extra_info
*extra_info
);
655 /* FIXME: cagney/2003-01-04: Allocate a frame from the heap (rather
656 than the frame obstack). Targets do this as a way of saving the
657 prologue analysis from the inner most frame before that frame has
658 been created. By always creating a frame, this problem goes away. */
659 extern struct frame_info
*deprecated_frame_xmalloc (void);
661 /* FIXME: cagney/2003-01-05: Allocate a frame, along with the
662 saved_regs and extra_info. Set up cleanups for all three. Same as
663 for deprecated_frame_xmalloc, targets are calling this when
664 creating a scratch `struct frame_info'. The frame overhaul makes
665 this unnecessary since all frame queries are parameterized with a
666 common cache parameter and a frame. */
667 extern struct frame_info
*deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs
,
668 long sizeof_extra_info
);
670 /* FIXME: cagney/2003-01-07: These are just nasty. Code shouldn't be
671 doing this. I suspect it dates back to the days when every field
672 of an allocated structure was explicitly initialized. */
673 extern void deprecated_set_frame_next_hack (struct frame_info
*fi
,
674 struct frame_info
*next
);
675 extern void deprecated_set_frame_prev_hack (struct frame_info
*fi
,
676 struct frame_info
*prev
);
678 /* FIXME: cagney/2003-01-07: Instead of the dwarf2cfi having its own
679 dedicated `struct frame_info . context' field, the code should use
680 the per frame `unwind_cache' that is passed to the
681 frame_pc_unwind(), frame_register_unwind() and frame_id_unwind()
684 See "dummy-frame.c" for an example of how a cfi-frame object can be
685 implemented using this. */
686 extern struct context
*deprecated_get_frame_context (struct frame_info
*fi
);
687 extern void deprecated_set_frame_context (struct frame_info
*fi
,
688 struct context
*context
);
690 /* Return non-zero if the architecture is relying on legacy frame
692 extern int legacy_frame_p (struct gdbarch
*gdbarch
);
694 #endif /* !defined (FRAME_H) */