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;
29 /* The traditional frame unwinder. */
30 extern const struct frame_unwind *trad_frame_unwind;
32 /* The frame object. */
36 /* The frame object's ID. This provides a per-frame unique identifier
37 that can be used to relocate a `struct frame_info' after a target
38 resume or a frame cache destruct. It of course assumes that the
39 inferior hasn't unwound the stack past that frame. */
43 /* The frame's address. This should be constant through out the
44 lifetime of a frame. */
45 /* NOTE: cagney/2002-11-16: The ia64 has two stacks and hence two
46 frame bases. This will need to be expanded to accomodate that. */
48 /* The frame's current PC. While the PC within the function may
49 change, the function that contains the PC does not. Should this
50 instead be the frame's function? */
54 /* Methods for constructing and comparing Frame IDs.
56 NOTE: Given frameless functions A and B, where A calls B (and hence
57 B is inner-to A). The relationships: !eq(A,B); !eq(B,A);
58 !inner(A,B); !inner(B,A); all hold. This is because, while B is
59 inner to A, B is not strictly inner to A (being frameless, they
60 have the same .base value). */
62 /* For convenience. All fields are zero. */
63 extern const struct frame_id null_frame_id;
65 /* Construct a frame ID. The second parameter isn't yet well defined.
66 It might be the containing function, or the resume PC (see comment
67 above in `struct frame_id')? A func/pc of zero indicates a
68 wildcard (i.e., do not use func in frame ID comparisons). */
69 extern struct frame_id frame_id_build (CORE_ADDR base,
70 CORE_ADDR func_or_pc);
72 /* Returns non-zero when L is a valid frame (a valid frame has a
74 extern int frame_id_p (struct frame_id l);
76 /* Returns non-zero when L and R identify the same frame, or, if
77 either L or R have a zero .func, then the same frame base. */
78 extern int frame_id_eq (struct frame_id l, struct frame_id r);
80 /* Returns non-zero when L is strictly inner-than R (they have
81 different frame .bases). Neither L, nor R can be `null'. See note
82 above about frameless functions. */
83 extern int frame_id_inner (struct frame_id l, struct frame_id r);
86 /* For every stopped thread, GDB tracks two frames: current and
87 selected. Current frame is the inner most frame of the selected
88 thread. Selected frame is the one being examined by the the GDB
89 CLI (selected using `up', `down', ...). The frames are created
90 on-demand (via get_prev_frame()) and then held in a frame cache. */
91 /* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
92 sequence: `thread 1; up; thread 2; thread 1' you loose thread 1's
93 selected frame. At present GDB only tracks the selected frame of
94 the current thread. But be warned, that might change. */
95 /* FIXME: cagney/2002-11-14: At any time, only one thread's selected
96 and current frame can be active. Switching threads causes gdb to
97 discard all that cached frame information. Ulgh! Instead, current
98 and selected frame should be bound to a thread. */
100 /* On demand, create the inner most frame using information found in
101 the inferior. If the inner most frame can't be created, throw an
103 extern struct frame_info *get_current_frame (void);
105 /* Invalidates the frame cache (this function should have been called
106 invalidate_cached_frames).
108 FIXME: cagney/2002-11-28: The only difference between
109 flush_cached_frames() and reinit_frame_cache() is that the latter
110 explicitly sets the selected frame back to the current frame there
111 isn't any real difference (except that one delays the selection of
112 a new frame). Code can instead simply rely on get_selected_frame()
113 to reinit's the selected frame as needed. As for invalidating the
114 cache, there should be two methods one that reverts the thread's
115 selected frame back to current frame (for when the inferior
116 resumes) and one that does not (for when the user modifies the
117 target invalidating the frame cache). */
118 extern void flush_cached_frames (void);
119 extern void reinit_frame_cache (void);
121 /* On demand, create the selected frame and then return it. If the
122 selected frame can not be created, this function throws an error. */
123 /* FIXME: cagney/2002-11-28: At present, when there is no selected
124 frame, this function always returns the current (inner most) frame.
125 It should instead, when a thread has previously had its frame
126 selected (but not resumed) and the frame cache invalidated, find
127 and then return that thread's previously selected frame. */
128 extern struct frame_info *get_selected_frame (void);
130 /* Select a specific frame. NULL, apparently implies re-select the
132 extern void select_frame (struct frame_info *);
134 /* Given a FRAME, return the next (more inner, younger) or previous
135 (more outer, older) frame. */
136 extern struct frame_info *get_prev_frame (struct frame_info *);
137 extern struct frame_info *get_next_frame (struct frame_info *);
139 /* Given a frame's ID, relocate the frame. Returns NULL if the frame
141 extern struct frame_info *frame_find_by_id (struct frame_id id);
143 /* Base attributes of a frame: */
145 /* The frame's `resume' address. Where the program will resume in
147 extern CORE_ADDR get_frame_pc (struct frame_info *);
149 /* Closely related to the resume address, various symbol table
150 attributes that are determined by the PC. Note that for a normal
151 frame, the PC refers to the resume address after the return, and
152 not the call instruction. In such a case, the address is adjusted
153 so that it (approximatly) identifies the call site (and not return
156 NOTE: cagney/2002-11-28: The frame cache could be used to cache the
157 computed value. Working on the assumption that the bottle-neck is
158 in the single step code, and that code causes the frame cache to be
159 constantly flushed, caching things in a frame is probably of little
160 benefit. As they say `show us the numbers'.
162 NOTE: cagney/2002-11-28: Plenty more where this one came from:
163 find_frame_block(), find_frame_partial_function(),
164 find_frame_symtab(), find_frame_function(). Each will need to be
165 carefully considered to determine if the real intent was for it to
166 apply to the PC or the adjusted PC. */
167 extern void find_frame_sal (struct frame_info *frame,
168 struct symtab_and_line *sal);
170 /* Return the frame address from FI. Except in the machine-dependent
171 *FRAME* macros, a frame address has no defined meaning other than
172 as a magic cookie which identifies a frame over calls to the
173 inferior (um, SEE NOTE BELOW). The only known exception is
174 inferior.h (DEPRECATED_PC_IN_CALL_DUMMY) [ON_STACK]; see comments
175 there. You cannot assume that a frame address contains enough
176 information to reconstruct the frame; if you want more than just to
177 identify the frame (e.g. be able to fetch variables relative to
178 that frame), then save the whole struct frame_info (and the next
179 struct frame_info, since the latter is used for fetching variables
180 on some machines) (um, again SEE NOTE BELOW).
182 NOTE: cagney/2002-11-18: Actually, the frame address isn't
183 sufficient for identifying a frame, and the counter examples are
186 Code that needs to (re)identify a frame must use get_frame_id() and
187 frame_find_by_id() (and in the future, a frame_compare() function
188 instead of INNER_THAN()). Two reasons: an architecture (e.g.,
189 ia64) can have more than one frame address (due to multiple stack
190 pointers) (frame ID is going to be expanded to accomodate this);
191 successive frameless function calls can only be differientated by
192 comparing both the frame's base and the frame's enclosing function
193 (frame_find_by_id() is going to be modified to perform this test).
195 The generic dummy frame version of DEPRECATED_PC_IN_CALL_DUMMY() is
196 able to identify a dummy frame using only the PC value. So the
197 frame address is not needed. In fact, most
198 DEPRECATED_PC_IN_CALL_DUMMY() calls now pass zero as the frame/sp
199 values as the caller knows that those values won't be used. Once
200 all architectures are using generic dummy frames,
201 DEPRECATED_PC_IN_CALL_DUMMY() can drop the sp/frame parameters.
202 When it comes to finding a dummy frame, the next frame's frame ID
203 (with out duing an unwind) can be used (ok, could if it wasn't for
204 the need to change the way the PPC defined frame base in a strange
207 Modern architectures should be using something like dwarf2's
208 location expression to describe where a variable lives. Such
209 expressions specify their own debug info centric frame address.
210 Consequently, a generic frame address is pretty meaningless. */
212 extern CORE_ADDR get_frame_base (struct frame_info *);
214 /* Return the per-frame unique identifer. Can be used to relocate a
215 frame after a frame cache flush (and other similar operations). If
216 FI is NULL, return the null_frame_id. */
217 extern struct frame_id get_frame_id (struct frame_info *fi);
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 /* A true stack frame, created by the target program during normal
231 /* A fake frame, created by GDB when performing an inferior function
234 /* In a signal handler, various OSs handle this in various ways.
235 The main thing is that the frame may be far from normal. */
238 extern enum frame_type get_frame_type (struct frame_info *);
240 /* FIXME: cagney/2002-11-10: Some targets want to directly mark a
241 frame as being of a specific type. This shouldn't be necessary.
242 PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
243 DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
244 the real problem here is that get_prev_frame() only sets
245 initialized after INIT_EXTRA_FRAME_INFO as been called.
246 Consequently, some targets found that the frame's type was wrong
247 and tried to fix it. The correct fix is to modify get_prev_frame()
248 so that it initializes the frame's type before calling any other
250 extern void deprecated_set_frame_type (struct frame_info *,
251 enum frame_type type);
253 /* Unwind the stack frame so that the value of REGNUM, in the previous
254 (up, older) frame is returned. If VALUEP is NULL, don't
255 fetch/compute the value. Instead just return the location of the
257 extern void frame_register_unwind (struct frame_info *frame, int regnum,
258 int *optimizedp, enum lval_type *lvalp,
259 CORE_ADDR *addrp, int *realnump,
262 /* More convenient interface to frame_register_unwind(). */
263 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
264 be changed to return an indication that the read succeeded. */
266 extern void frame_unwind_signed_register (struct frame_info *frame,
267 int regnum, LONGEST *val);
269 extern void frame_unwind_unsigned_register (struct frame_info *frame,
270 int regnum, ULONGEST *val);
272 /* Get the value of the register that belongs to this FRAME. This
273 function is a wrapper to the call sequence ``frame_unwind_register
274 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
275 VALUEP is NULL, the registers value is not fetched/computed. */
277 extern void frame_register (struct frame_info *frame, int regnum,
278 int *optimizedp, enum lval_type *lvalp,
279 CORE_ADDR *addrp, int *realnump,
282 /* More convenient interface to frame_register(). */
283 /* NOTE: cagney/2002-09-13: Return void as one day these functions may
284 be changed to return an indication that the read succeeded. */
286 extern void frame_read_signed_register (struct frame_info *frame,
287 int regnum, LONGEST *val);
289 extern void frame_read_unsigned_register (struct frame_info *frame,
290 int regnum, ULONGEST *val);
292 /* Map between a frame register number and its name. A frame register
293 space is a superset of the cooked register space --- it also
294 includes builtin registers. */
296 extern int frame_map_name_to_regnum (const char *name, int strlen);
297 extern const char *frame_map_regnum_to_name (int regnum);
299 /* Unwind the PC. Strictly speaking return the resume address of the
300 calling frame. For GDB, `pc' is the resume address and not a
301 specific register. */
303 extern CORE_ADDR frame_pc_unwind (struct frame_info *frame);
305 /* Unwind the frame ID. Return an ID that uniquely identifies the
307 extern struct frame_id frame_id_unwind (struct frame_info *frame);
309 /* Discard the specified frame. Restoring the registers to the state
311 extern void frame_pop (struct frame_info *frame);
313 /* Describe the saved registers of a frame. */
315 #if defined (EXTRA_FRAME_INFO) || defined (FRAME_FIND_SAVED_REGS)
316 /* XXXX - deprecated */
317 struct frame_saved_regs
319 /* For each register R (except the SP), regs[R] is the address at
320 which it was saved on entry to the frame, or zero if it was not
321 saved on entry to this frame. This includes special registers
322 such as pc and fp saved in special ways in the stack frame.
324 regs[SP_REGNUM] is different. It holds the actual SP, not the
325 address at which it was saved. */
327 CORE_ADDR regs[NUM_REGS];
331 /* We keep a cache of stack frames, each of which is a "struct
332 frame_info". The innermost one gets allocated (in
333 wait_for_inferior) each time the inferior stops; current_frame
334 points to it. Additional frames get allocated (in
335 get_prev_frame) as needed, and are chained through the next
336 and prev fields. Any time that the frame cache becomes invalid
337 (most notably when we execute something, but also if we change how
338 we interpret the frames (e.g. "set heuristic-fence-post" in
339 mips-tdep.c, or anything which reads new symbols)), we should call
340 reinit_frame_cache. */
344 /* Nominal address of the frame described. See comments at
345 get_frame_base() about what this means outside the *FRAME*
346 macros; in the *FRAME* macros, it can mean whatever makes most
347 sense for this machine. */
350 /* Address at which execution is occurring in this frame.
351 For the innermost frame, it's the current pc.
352 For other frames, it is a pc saved in the next frame. */
355 /* Level of this frame. The inner-most (youngest) frame is at
356 level 0. As you move towards the outer-most (oldest) frame,
357 the level increases. This is a cached value. It could just as
358 easily be computed by counting back from the selected frame to
359 the inner most frame. */
360 /* NOTE: cagney/2002-04-05: Perhaphs a level of ``-1'' should be
361 reserved to indicate a bogus frame - one that has been created
362 just to keep GDB happy (GDB always needs a frame). For the
363 moment leave this as speculation. */
366 /* The frame's type. */
367 enum frame_type type;
369 /* For each register, address of where it was saved on entry to
370 the frame, or zero if it was not saved on entry to this frame.
371 This includes special registers such as pc and fp saved in
372 special ways in the stack frame. The SP_REGNUM is even more
373 special, the address here is the sp for the previous frame, not
374 the address where the sp was saved. */
375 /* Allocated by frame_saved_regs_zalloc () which is called /
376 initialized by FRAME_INIT_SAVED_REGS(). */
377 CORE_ADDR *saved_regs; /*NUM_REGS + NUM_PSEUDO_REGS*/
379 #ifdef EXTRA_FRAME_INFO
380 /* XXXX - deprecated */
381 /* Anything extra for this structure that may have been defined
382 in the machine dependent files. */
386 /* Anything extra for this structure that may have been defined
387 in the machine dependent files. */
388 /* Allocated by frame_extra_info_zalloc () which is called /
389 initialized by INIT_EXTRA_FRAME_INFO */
390 struct frame_extra_info *extra_info;
392 /* If dwarf2 unwind frame informations is used, this structure holds all
393 related unwind data. */
394 struct context *context;
396 /* Unwind cache shared between the unwind functions - they had
397 better all agree as to the contents. */
400 /* The frame's unwinder. */
401 const struct frame_unwind *unwind;
403 /* Cached copy of the previous frame's resume address. */
404 int pc_unwind_cache_p;
405 CORE_ADDR pc_unwind_cache;
407 /* Cached copy of the previous frame's ID. */
408 int id_unwind_cache_p;
409 struct frame_id id_unwind_cache;
411 /* Pointers to the next (down, inner, younger) and previous (up,
412 outer, older) frame_info's in the frame cache. */
413 struct frame_info *next; /* down, inner, younger */
415 struct frame_info *prev; /* up, outer, older */
418 /* Values for the source flag to be used in print_frame_info_base(). */
421 /* Print only the source line, like in stepi. */
423 /* Print only the location, i.e. level, address (sometimes)
424 function, args, file, line, line num. */
426 /* Print both of the above. */
428 /* Print location only, but always include the address. */
432 /* Allocate additional space for appendices to a struct frame_info.
433 NOTE: Much of GDB's code works on the assumption that the allocated
434 saved_regs[] array is the size specified below. If you try to make
435 that array smaller, GDB will happily walk off its end. */
437 #ifdef SIZEOF_FRAME_SAVED_REGS
438 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
440 #define SIZEOF_FRAME_SAVED_REGS \
441 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
443 /* Allocate zero initialized memory from the frame cache obstack.
444 Appendices to the frame info (such as the unwind cache) should
445 allocate memory using this method. */
447 extern void *frame_obstack_zalloc (unsigned long size);
449 /* If FRAME_CHAIN_VALID returns zero it means that the given frame
450 is the outermost one and has no caller. */
452 extern int frame_chain_valid (CORE_ADDR, struct frame_info *);
454 extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
457 #ifdef FRAME_FIND_SAVED_REGS
458 /* XXX - deprecated */
459 #define FRAME_INIT_SAVED_REGS(FI) deprecated_get_frame_saved_regs (FI, NULL)
460 extern void deprecated_get_frame_saved_regs (struct frame_info *,
461 struct frame_saved_regs *);
464 extern struct block *get_frame_block (struct frame_info *,
465 CORE_ADDR *addr_in_block);
467 /* Return the `struct block' that belongs to the selected thread's
468 selected frame. If the inferior has no state, return NULL.
470 NOTE: cagney/2002-11-29:
472 No state? Does the inferior have any execution state (a core file
473 does, an executable does not). At present the code tests
474 `target_has_stack' but I'm left wondering if it should test
475 `target_has_registers' or, even, a merged target_has_state.
477 Should it look at the most recently specified SAL? If the target
478 has no state, should this function try to extract a block from the
479 most recently selected SAL? That way `list foo' would give it some
480 sort of reference point. Then again, perhaphs that would confuse
483 Calls to this function can be broken down into two categories: Code
484 that uses the selected block as an additional, but optional, data
485 point; Code that uses the selected block as a prop, when it should
486 have the relevant frame/block/pc explicitly passed in.
488 The latter can be eliminated by correctly parameterizing the code,
489 the former though is more interesting. Per the "address" command,
490 it occures in the CLI code and makes it possible for commands to
491 work, even when the inferior has no state. */
493 extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
495 extern struct symbol *get_frame_function (struct frame_info *);
497 extern CORE_ADDR frame_address_in_block (struct frame_info *);
499 extern CORE_ADDR get_pc_function_start (CORE_ADDR);
501 extern struct block *block_for_pc (CORE_ADDR);
503 extern struct block *block_for_pc_sect (CORE_ADDR, asection *);
505 extern int frameless_look_for_prologue (struct frame_info *);
507 extern void print_frame_args (struct symbol *, struct frame_info *,
508 int, struct ui_file *);
510 extern struct frame_info *find_relative_frame (struct frame_info *, int *);
512 extern void show_and_print_stack_frame (struct frame_info *fi, int level,
515 extern void print_stack_frame (struct frame_info *, int, int);
517 extern void show_stack_frame (struct frame_info *);
519 extern void print_frame_info (struct frame_info *, int, int, int);
521 extern void show_frame_info (struct frame_info *, int, int, int);
523 extern struct frame_info *block_innermost_frame (struct block *);
525 /* NOTE: cagney/2002-09-13: There is no need for this function.
526 Instead either of frame_unwind_signed_register() or
527 frame_unwind_unsigned_register() can be used. */
528 extern CORE_ADDR deprecated_read_register_dummy (CORE_ADDR pc,
530 extern void generic_push_dummy_frame (void);
531 extern void generic_pop_current_frame (void (*)(struct frame_info *));
532 extern void generic_pop_dummy_frame (void);
534 extern int generic_pc_in_call_dummy (CORE_ADDR pc,
535 CORE_ADDR sp, CORE_ADDR fp);
537 /* NOTE: cagney/2002-06-26: Targets should no longer use this
538 function. Instead, the contents of a dummy frames registers can be
539 obtained by applying: frame_register_unwind to the dummy frame; or
540 get_saved_register to the next outer frame. */
542 extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
544 extern void generic_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
545 int nargs, struct value **args,
546 struct type *type, int gcc_p);
548 /* The function generic_get_saved_register() has been made obsolete.
549 GET_SAVED_REGISTER now defaults to the recursive equivalent -
550 generic_unwind_get_saved_register() - so there is no need to even
551 set GET_SAVED_REGISTER. Architectures that need to override the
552 register unwind mechanism should modify frame->unwind(). */
553 extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR *,
554 struct frame_info *, int,
557 extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
559 extern void get_saved_register (char *raw_buffer, int *optimized,
561 struct frame_info *frame,
562 int regnum, enum lval_type *lval);
564 extern int frame_register_read (struct frame_info *frame, int regnum,
568 extern void args_info (char *, int);
570 extern void locals_info (char *, int);
572 extern void (*selected_frame_level_changed_hook) (int);
574 extern void return_command (char *, int);
577 /* NOTE: cagney/2002-11-27:
579 You might think that the below global can simply be replaced by a
580 call to either get_selected_frame() or select_frame().
582 Unfortunatly, it isn't that easy.
584 The relevant code needs to be audited to determine if it is
585 possible (or pratical) to instead pass the applicable frame in as a
586 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
587 the deprecated_selected_frame global, while its replacement,
588 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
589 The only real exceptions occure at the edge (in the CLI code) where
590 user commands need to pick up the selected frame before proceeding.
592 This is important. GDB is trying to stamp out the hack:
594 saved_frame = deprecated_selected_frame;
595 deprecated_selected_frame = ...;
596 hack_using_global_selected_frame ();
597 deprecated_selected_frame = saved_frame;
601 extern struct frame_info *deprecated_selected_frame;
604 /* Create a frame using the specified BASE and PC. */
606 extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
609 /* Create/access the frame's `extra info'. The extra info is used by
610 older code to store information such as the analyzed prologue. The
611 zalloc() should only be called by the INIT_EXTRA_INFO method. */
613 extern struct frame_extra_info *frame_extra_info_zalloc (struct frame_info *fi,
615 extern struct frame_extra_info *get_frame_extra_info (struct frame_info *fi);
617 /* Create/access the frame's `saved_regs'. The saved regs are used by
618 older code to store the address of each register (except for
619 SP_REGNUM where the value of the register in the previous frame is
621 extern CORE_ADDR *frame_saved_regs_zalloc (struct frame_info *);
622 extern CORE_ADDR *get_frame_saved_regs (struct frame_info *);
624 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
625 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
626 the initial frame create. This puts things back in sync. */
627 extern void deprecated_update_frame_pc_hack (struct frame_info *frame,
630 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
631 more exact, whas that initial guess at the frame's base as returned
632 by read_fp() wrong. If it was, fix it. This shouldn't be
633 necessary since the code should be getting the frame's base correct
635 extern void deprecated_update_frame_base_hack (struct frame_info *frame,
638 /* FIXME: cagney/2003-01-04: Explicitly set the frame's saved_regs
639 and/or extra_info. Target code is allocating a fake frame and than
640 initializing that to get around the problem of, when creating the
641 inner most frame, there is no where to cache information such as
642 the prologue analysis. This is fixed by the new unwind mechanism -
643 even the inner most frame has somewhere to store things like the
644 prolog analysis (or at least will once the frame overhaul is
646 extern void deprecated_set_frame_saved_regs_hack (struct frame_info *frame,
647 CORE_ADDR *saved_regs);
648 extern void deprecated_set_frame_extra_info_hack (struct frame_info *frame,
649 struct frame_extra_info *extra_info);
651 /* FIXME: cagney/2003-01-04: Allocate a frame from the heap (rather
652 than the frame obstack). Targets do this as a way of saving the
653 prologue analysis from the inner most frame before that frame has
654 been created. By always creating a frame, this problem goes away. */
655 extern struct frame_info *deprecated_frame_xmalloc (void);
657 /* FIXME: cagney/2003-01-05: Allocate a frame, along with the
658 saved_regs and extra_info. Set up cleanups for all three. Same as
659 for deprecated_frame_xmalloc, targets are calling this when
660 creating a scratch `struct frame_info'. The frame overhaul makes
661 this unnecessary since all frame queries are parameterized with a
662 common cache parameter and a frame. */
663 extern struct frame_info *deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
664 long sizeof_extra_info);
666 /* FIXME: cagney/2003-01-07: These are just nasty. Code shouldn't be
667 doing this. I suspect it dates back to the days when every field
668 of an allocated structure was explicitly initialized. */
669 extern void deprecated_set_frame_next_hack (struct frame_info *fi,
670 struct frame_info *next);
671 extern void deprecated_set_frame_prev_hack (struct frame_info *fi,
672 struct frame_info *prev);
674 /* FIXME: cagney/2003-01-07: Instead of the dwarf2cfi having its own
675 dedicated `struct frame_info . context' field, the code should use
676 the per frame `unwind_cache' that is passed to the
677 frame_pc_unwind(), frame_register_unwind() and frame_id_unwind()
680 See "dummy-frame.c" for an example of how a cfi-frame object can be
681 implemented using this. */
682 extern struct context *deprecated_get_frame_context (struct frame_info *fi);
683 extern void deprecated_set_frame_context (struct frame_info *fi,
684 struct context *context);
686 #endif /* !defined (FRAME_H) */