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 /* Closely related to the resume address, various symbol table
153 attributes that are determined by the PC. Note that for a normal
154 frame, the PC refers to the resume address after the return, and
155 not the call instruction. In such a case, the address is adjusted
156 so that it (approximatly) identifies the call site (and not return
159 NOTE: cagney/2002-11-28: The frame cache could be used to cache the
160 computed value. Working on the assumption that the bottle-neck is
161 in the single step code, and that code causes the frame cache to be
162 constantly flushed, caching things in a frame is probably of little
163 benefit. As they say `show us the numbers'.
165 NOTE: cagney/2002-11-28: Plenty more where this one came from:
166 find_frame_block(), find_frame_partial_function(),
167 find_frame_symtab(), find_frame_function(). Each will need to be
168 carefully considered to determine if the real intent was for it to
169 apply to the PC or the adjusted PC. */
170 extern void find_frame_sal (struct frame_info *frame,
171 struct symtab_and_line *sal);
173 /* Return the frame base (what ever that is) (DEPRECATED).
175 Old code was trying to use this single method for two conflicting
176 purposes. Such code needs to be updated to use either of:
178 get_frame_id: A low level frame unique identifier, that consists of
179 both a stack and a function address, that can be used to uniquely
180 identify a frame. This value is determined by the frame's
181 low-level unwinder, the stack part [typically] being the
182 top-of-stack of the previous frame, and the function part being the
183 function's start address. Since the correct identification of a
184 frameless function requires both the a stack and function address,
185 the old get_frame_base method was not sufficient.
187 get_frame_base_address: get_frame_locals_address:
188 get_frame_args_address: A set of high-level debug-info dependant
189 addresses that fall within the frame. These addresses almost
190 certainly will not match the stack address part of a frame ID (as
191 returned by get_frame_base). */
193 extern CORE_ADDR get_frame_base (struct frame_info *);
195 /* Return the per-frame unique identifer. Can be used to relocate a
196 frame after a frame cache flush (and other similar operations). If
197 FI is NULL, return the null_frame_id. */
198 extern struct frame_id get_frame_id (struct frame_info *fi);
200 /* Assuming that a frame is `normal', return its base-address, or 0 if
201 the information isn't available. NOTE: This address is really only
202 meaningful to the frame's high-level debug info. */
203 extern CORE_ADDR get_frame_base_address (struct frame_info *);
205 /* Assuming that a frame is `normal', return the base-address of the
206 local variables, or 0 if the information isn't available. NOTE:
207 This address is really only meaningful to the frame's high-level
208 debug info. Typically, the argument and locals share a single
210 extern CORE_ADDR get_frame_locals_address (struct frame_info *);
212 /* Assuming that a frame is `normal', return the base-address of the
213 parameter list, or 0 if that information isn't available. NOTE:
214 This address is really only meaningful to the frame's high-level
215 debug info. Typically, the argument and locals share a single
217 extern CORE_ADDR get_frame_args_address (struct frame_info *);
219 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
220 for an invalid frame). */
221 extern int frame_relative_level (struct frame_info *fi);
223 /* Return the frame's type. Some are real, some are signal
224 trampolines, and some are completly artificial (dummy). */
228 /* The frame's type hasn't yet been defined. This is a catch-all
229 for legacy code that uses really strange technicques, such as
230 deprecated_set_frame_type, to set the frame's type. New code
231 should not use this value. */
233 /* A true stack frame, created by the target program during normal
236 /* A fake frame, created by GDB when performing an inferior function
239 /* In a signal handler, various OSs handle this in various ways.
240 The main thing is that the frame may be far from normal. */
243 extern enum frame_type get_frame_type (struct frame_info *);
245 /* FIXME: cagney/2002-11-10: Some targets want to directly mark a
246 frame as being of a specific type. This shouldn't be necessary.
247 PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
248 DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
249 the real problem here is that get_prev_frame() only sets
250 initialized after DEPRECATED_INIT_EXTRA_FRAME_INFO as been called.
251 Consequently, some targets found that the frame's type was wrong
252 and tried to fix it. The correct fix is to modify get_prev_frame()
253 so that it initializes the frame's type before calling any other
255 extern void deprecated_set_frame_type (struct frame_info *,
256 enum frame_type type);
258 /* Unwind the stack frame so that the value of REGNUM, in the previous
259 (up, older) frame is returned. If VALUEP is NULL, don't
260 fetch/compute the value. Instead just return the location of the
262 extern void frame_register_unwind (struct frame_info *frame, int regnum,
263 int *optimizedp, enum lval_type *lvalp,
264 CORE_ADDR *addrp, int *realnump,
267 /* More convenient interface to frame_register_unwind(). */
268 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
269 be changed to return an indication that the read succeeded. */
271 extern void frame_unwind_register (struct frame_info *frame,
272 int regnum, void *buf);
274 extern void frame_unwind_signed_register (struct frame_info *frame,
275 int regnum, LONGEST *val);
277 extern void frame_unwind_unsigned_register (struct frame_info *frame,
278 int regnum, ULONGEST *val);
280 /* Get the value of the register that belongs to this FRAME. This
281 function is a wrapper to the call sequence ``frame_unwind_register
282 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
283 VALUEP is NULL, the registers value is not fetched/computed. */
285 extern void frame_register (struct frame_info *frame, int regnum,
286 int *optimizedp, enum lval_type *lvalp,
287 CORE_ADDR *addrp, int *realnump,
290 /* More convenient interface to frame_register(). */
291 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
292 be changed to return an indication that the read succeeded. */
294 extern void frame_read_register (struct frame_info *frame, int regnum,
297 extern void frame_read_signed_register (struct frame_info *frame,
298 int regnum, LONGEST *val);
300 extern void frame_read_unsigned_register (struct frame_info *frame,
301 int regnum, ULONGEST *val);
303 /* Map between a frame register number and its name. A frame register
304 space is a superset of the cooked register space --- it also
305 includes builtin registers. If NAMELEN is negative, use the NAME's
306 length when doing the comparison. */
308 extern int frame_map_name_to_regnum (const char *name, int namelen);
309 extern const char *frame_map_regnum_to_name (int regnum);
311 /* Unwind the PC. Strictly speaking return the resume address of the
312 calling frame. For GDB, `pc' is the resume address and not a
313 specific register. */
315 extern CORE_ADDR frame_pc_unwind (struct frame_info *frame);
317 /* Discard the specified frame. Restoring the registers to the state
319 extern void frame_pop (struct frame_info *frame);
321 /* Describe the saved registers of a frame. */
323 #if defined (EXTRA_FRAME_INFO) || defined (FRAME_FIND_SAVED_REGS)
324 /* XXXX - deprecated */
325 struct frame_saved_regs
327 /* For each register R (except the SP), regs[R] is the address at
328 which it was saved on entry to the frame, or zero if it was not
329 saved on entry to this frame. This includes special registers
330 such as pc and fp saved in special ways in the stack frame.
332 regs[SP_REGNUM] is different. It holds the actual SP, not the
333 address at which it was saved. */
335 CORE_ADDR regs[NUM_REGS];
339 /* We keep a cache of stack frames, each of which is a "struct
340 frame_info". The innermost one gets allocated (in
341 wait_for_inferior) each time the inferior stops; current_frame
342 points to it. Additional frames get allocated (in
343 get_prev_frame) as needed, and are chained through the next
344 and prev fields. Any time that the frame cache becomes invalid
345 (most notably when we execute something, but also if we change how
346 we interpret the frames (e.g. "set heuristic-fence-post" in
347 mips-tdep.c, or anything which reads new symbols)), we should call
348 reinit_frame_cache. */
352 /* Nominal address of the frame described. See comments at
353 get_frame_base() about what this means outside the *FRAME*
354 macros; in the *FRAME* macros, it can mean whatever makes most
355 sense for this machine. */
358 /* Address at which execution is occurring in this frame.
359 For the innermost frame, it's the current pc.
360 For other frames, it is a pc saved in the next frame. */
363 /* Level of this frame. The inner-most (youngest) frame is at
364 level 0. As you move towards the outer-most (oldest) frame,
365 the level increases. This is a cached value. It could just as
366 easily be computed by counting back from the selected frame to
367 the inner most frame. */
368 /* NOTE: cagney/2002-04-05: Perhaphs a level of ``-1'' should be
369 reserved to indicate a bogus frame - one that has been created
370 just to keep GDB happy (GDB always needs a frame). For the
371 moment leave this as speculation. */
374 /* The frame's type. */
375 /* FIXME: cagney/2003-04-02: Should instead be returning
376 ->unwind->type. Unfortunatly, legacy code is still explicitly
377 setting the type using the method deprecated_set_frame_type.
378 Eliminate that method and this field can be eliminated. */
379 enum frame_type type;
381 /* For each register, address of where it was saved on entry to
382 the frame, or zero if it was not saved on entry to this frame.
383 This includes special registers such as pc and fp saved in
384 special ways in the stack frame. The SP_REGNUM is even more
385 special, the address here is the sp for the previous frame, not
386 the address where the sp was saved. */
387 /* Allocated by frame_saved_regs_zalloc () which is called /
388 initialized by DEPRECATED_FRAME_INIT_SAVED_REGS(). */
389 CORE_ADDR *saved_regs; /*NUM_REGS + NUM_PSEUDO_REGS*/
391 #ifdef EXTRA_FRAME_INFO
392 /* XXXX - deprecated */
393 /* Anything extra for this structure that may have been defined
394 in the machine dependent files. */
398 /* Anything extra for this structure that may have been defined
399 in the machine dependent files. */
400 /* Allocated by frame_extra_info_zalloc () which is called /
401 initialized by DEPRECATED_INIT_EXTRA_FRAME_INFO */
402 struct frame_extra_info *extra_info;
404 /* If dwarf2 unwind frame informations is used, this structure holds all
405 related unwind data. */
406 struct context *context;
408 /* The frame's low-level unwinder and corresponding cache. The
409 low-level unwinder is responsible for unwinding register values
410 for the previous frame. The low-level unwind methods are
411 selected based on the presence, or otherwize, of register
412 unwind information such as CFI. */
413 void *prologue_cache;
414 const struct frame_unwind *unwind;
416 /* Cached copy of the previous frame's resume address. */
417 int pc_unwind_cache_p;
418 CORE_ADDR pc_unwind_cache;
420 /* This frame's ID. Note that the frame's ID, base and PC contain
421 redundant information. */
425 /* The frame's high-level base methods, and corresponding cache.
426 The high level base methods are selected based on the frame's
428 const struct frame_base *base;
431 /* Pointers to the next (down, inner, younger) and previous (up,
432 outer, older) frame_info's in the frame cache. */
433 struct frame_info *next; /* down, inner, younger */
435 struct frame_info *prev; /* up, outer, older */
438 /* Values for the source flag to be used in print_frame_info_base(). */
441 /* Print only the source line, like in stepi. */
443 /* Print only the location, i.e. level, address (sometimes)
444 function, args, file, line, line num. */
446 /* Print both of the above. */
448 /* Print location only, but always include the address. */
452 /* Allocate additional space for appendices to a struct frame_info.
453 NOTE: Much of GDB's code works on the assumption that the allocated
454 saved_regs[] array is the size specified below. If you try to make
455 that array smaller, GDB will happily walk off its end. */
457 #ifdef SIZEOF_FRAME_SAVED_REGS
458 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
460 #define SIZEOF_FRAME_SAVED_REGS \
461 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
463 /* Allocate zero initialized memory from the frame cache obstack.
464 Appendices to the frame info (such as the unwind cache) should
465 allocate memory using this method. */
467 extern void *frame_obstack_zalloc (unsigned long size);
468 #define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
470 /* If DEPRECATED_FRAME_CHAIN_VALID returns zero it means that the
471 given frame is the outermost one and has no caller. */
473 extern int frame_chain_valid (CORE_ADDR, struct frame_info *);
475 extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
478 #ifdef FRAME_FIND_SAVED_REGS
479 /* XXX - deprecated */
480 #define DEPRECATED_FRAME_INIT_SAVED_REGS(FI) deprecated_get_frame_saved_regs (FI, NULL)
481 extern void deprecated_get_frame_saved_regs (struct frame_info *,
482 struct frame_saved_regs *);
485 extern struct block *get_frame_block (struct frame_info *,
486 CORE_ADDR *addr_in_block);
488 /* Return the `struct block' that belongs to the selected thread's
489 selected frame. If the inferior has no state, return NULL.
491 NOTE: cagney/2002-11-29:
493 No state? Does the inferior have any execution state (a core file
494 does, an executable does not). At present the code tests
495 `target_has_stack' but I'm left wondering if it should test
496 `target_has_registers' or, even, a merged target_has_state.
498 Should it look at the most recently specified SAL? If the target
499 has no state, should this function try to extract a block from the
500 most recently selected SAL? That way `list foo' would give it some
501 sort of reference point. Then again, perhaphs that would confuse
504 Calls to this function can be broken down into two categories: Code
505 that uses the selected block as an additional, but optional, data
506 point; Code that uses the selected block as a prop, when it should
507 have the relevant frame/block/pc explicitly passed in.
509 The latter can be eliminated by correctly parameterizing the code,
510 the former though is more interesting. Per the "address" command,
511 it occures in the CLI code and makes it possible for commands to
512 work, even when the inferior has no state. */
514 extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
516 extern struct symbol *get_frame_function (struct frame_info *);
518 extern CORE_ADDR frame_address_in_block (struct frame_info *);
520 extern CORE_ADDR get_pc_function_start (CORE_ADDR);
522 extern int frameless_look_for_prologue (struct frame_info *);
524 extern void print_frame_args (struct symbol *, struct frame_info *,
525 int, struct ui_file *);
527 extern struct frame_info *find_relative_frame (struct frame_info *, int *);
529 extern void show_and_print_stack_frame (struct frame_info *fi, int level,
532 extern void print_stack_frame (struct frame_info *, int, int);
534 extern void show_stack_frame (struct frame_info *);
536 extern void print_frame_info (struct frame_info *, int, int, int);
538 extern void show_frame_info (struct frame_info *, int, int, int);
540 extern struct frame_info *block_innermost_frame (struct block *);
542 /* NOTE: cagney/2002-09-13: There is no need for this function.
543 Instead either of frame_unwind_signed_register() or
544 frame_unwind_unsigned_register() can be used. */
545 extern CORE_ADDR deprecated_read_register_dummy (CORE_ADDR pc,
547 extern void generic_push_dummy_frame (void);
548 extern void generic_pop_current_frame (void (*)(struct frame_info *));
549 extern void generic_pop_dummy_frame (void);
551 extern int generic_pc_in_call_dummy (CORE_ADDR pc,
552 CORE_ADDR sp, CORE_ADDR fp);
554 /* NOTE: cagney/2002-06-26: Targets should no longer use this
555 function. Instead, the contents of a dummy frames registers can be
556 obtained by applying: frame_register_unwind to the dummy frame; or
557 frame_register_unwind() to the next outer frame. */
559 extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
561 void generic_unwind_get_saved_register (char *raw_buffer,
564 struct frame_info *frame,
566 enum lval_type *lvalp);
568 /* The function generic_get_saved_register() has been made obsolete.
569 DEPRECATED_GET_SAVED_REGISTER now defaults to the recursive
570 equivalent - generic_unwind_get_saved_register() - so there is no
571 need to even set DEPRECATED_GET_SAVED_REGISTER. Architectures that
572 need to override the register unwind mechanism should modify
574 extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR *,
575 struct frame_info *, int,
578 extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
580 /* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
581 function called frame_read_register_p(). This slightly weird (and
582 older) variant of frame_read_register() returns zero (indicating
583 the register is unavailable) if either: the register isn't cached;
584 or the register has been optimized out. Problem is, neither check
585 is exactly correct. A register can't be optimized out (it may not
586 have been saved as part of a function call); The fact that a
587 register isn't in the register cache doesn't mean that the register
588 isn't available (it could have been fetched from memory). */
590 extern int frame_register_read (struct frame_info *frame, int regnum,
594 extern void args_info (char *, int);
596 extern void locals_info (char *, int);
598 extern void (*selected_frame_level_changed_hook) (int);
600 extern void return_command (char *, int);
603 /* NOTE: cagney/2002-11-27:
605 You might think that the below global can simply be replaced by a
606 call to either get_selected_frame() or select_frame().
608 Unfortunatly, it isn't that easy.
610 The relevant code needs to be audited to determine if it is
611 possible (or pratical) to instead pass the applicable frame in as a
612 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
613 the deprecated_selected_frame global, while its replacement,
614 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
615 The only real exceptions occure at the edge (in the CLI code) where
616 user commands need to pick up the selected frame before proceeding.
618 This is important. GDB is trying to stamp out the hack:
620 saved_frame = deprecated_selected_frame;
621 deprecated_selected_frame = ...;
622 hack_using_global_selected_frame ();
623 deprecated_selected_frame = saved_frame;
627 extern struct frame_info *deprecated_selected_frame;
630 /* Create a frame using the specified BASE and PC. */
632 extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
635 /* Create/access the frame's `extra info'. The extra info is used by
636 older code to store information such as the analyzed prologue. The
637 zalloc() should only be called by the INIT_EXTRA_INFO method. */
639 extern struct frame_extra_info *frame_extra_info_zalloc (struct frame_info *fi,
641 extern struct frame_extra_info *get_frame_extra_info (struct frame_info *fi);
643 /* Create/access the frame's `saved_regs'. The saved regs are used by
644 older code to store the address of each register (except for
645 SP_REGNUM where the value of the register in the previous frame is
647 extern CORE_ADDR *frame_saved_regs_zalloc (struct frame_info *);
648 extern CORE_ADDR *get_frame_saved_regs (struct frame_info *);
650 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
651 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
652 the initial frame create. This puts things back in sync. */
653 extern void deprecated_update_frame_pc_hack (struct frame_info *frame,
656 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
657 more exact, whas that initial guess at the frame's base as returned
658 by read_fp() wrong. If it was, fix it. This shouldn't be
659 necessary since the code should be getting the frame's base correct
661 extern void deprecated_update_frame_base_hack (struct frame_info *frame,
664 /* FIXME: cagney/2003-01-04: Explicitly set the frame's saved_regs
665 and/or extra_info. Target code is allocating a fake frame and than
666 initializing that to get around the problem of, when creating the
667 inner most frame, there is no where to cache information such as
668 the prologue analysis. This is fixed by the new unwind mechanism -
669 even the inner most frame has somewhere to store things like the
670 prolog analysis (or at least will once the frame overhaul is
672 extern void deprecated_set_frame_saved_regs_hack (struct frame_info *frame,
673 CORE_ADDR *saved_regs);
674 extern void deprecated_set_frame_extra_info_hack (struct frame_info *frame,
675 struct frame_extra_info *extra_info);
677 /* FIXME: cagney/2003-01-04: Allocate a frame from the heap (rather
678 than the frame obstack). Targets do this as a way of saving the
679 prologue analysis from the inner most frame before that frame has
680 been created. By always creating a frame, this problem goes away. */
681 extern struct frame_info *deprecated_frame_xmalloc (void);
683 /* FIXME: cagney/2003-01-05: Allocate a frame, along with the
684 saved_regs and extra_info. Set up cleanups for all three. Same as
685 for deprecated_frame_xmalloc, targets are calling this when
686 creating a scratch `struct frame_info'. The frame overhaul makes
687 this unnecessary since all frame queries are parameterized with a
688 common cache parameter and a frame. */
689 extern struct frame_info *deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
690 long sizeof_extra_info);
692 /* FIXME: cagney/2003-01-07: These are just nasty. Code shouldn't be
693 doing this. I suspect it dates back to the days when every field
694 of an allocated structure was explicitly initialized. */
695 extern void deprecated_set_frame_next_hack (struct frame_info *fi,
696 struct frame_info *next);
697 extern void deprecated_set_frame_prev_hack (struct frame_info *fi,
698 struct frame_info *prev);
700 /* FIXME: cagney/2003-01-07: Instead of the dwarf2cfi having its own
701 dedicated `struct frame_info . context' field, the code should use
702 the per frame `unwind_cache' that is passed to the
703 frame_pc_unwind(), frame_register_unwind() and frame_id_unwind()
706 See "dummy-frame.c" for an example of how a cfi-frame object can be
707 implemented using this. */
708 extern struct context *deprecated_get_frame_context (struct frame_info *fi);
709 extern void deprecated_set_frame_context (struct frame_info *fi,
710 struct context *context);
712 /* Return non-zero if the architecture is relying on legacy frame
714 extern int legacy_frame_p (struct gdbarch *gdbarch);
716 #endif /* !defined (FRAME_H) */