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, 2004 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 /* The following is the intended naming schema for frame functions.
27 It isn't 100% consistent, but it is aproaching that. Frame naming
32 get_frame_WHAT...(): Get WHAT from the THIS frame (functionaly
33 equivalent to THIS->next->unwind->what)
35 frame_unwind_WHAT...(): Unwind THIS frame's WHAT from the NEXT
38 put_frame_WHAT...(): Put a value into this frame (unsafe, need to
39 invalidate the frame / regcache afterwards) (better name more
40 strongly hinting at its unsafeness)
42 safe_....(): Safer version of various functions, doesn't throw an
43 error (leave this for later?). Returns non-zero if the fetch
44 succeeds. Return a freshly allocated error message?
48 void /frame/_WHAT(): Read WHAT's value into the buffer parameter.
50 ULONGEST /frame/_WHAT_unsigned(): Return an unsigned value (the
51 alternative is *frame_unsigned_WHAT).
53 LONGEST /frame/_WHAT_signed(): Return WHAT signed value.
57 /frame/_memory* (frame, coreaddr, len [, buf]): Extract/return
60 /frame/_register* (frame, regnum [, buf]): extract/return register.
62 CORE_ADDR /frame/_{pc,sp,...} (frame): Resume address, innner most
67 struct symtab_and_line;
74 /* A legacy unwinder to prop up architectures using the old style
76 extern const struct frame_unwind *legacy_saved_regs_unwind;
78 /* The frame object. */
82 /* The frame object's ID. This provides a per-frame unique identifier
83 that can be used to relocate a `struct frame_info' after a target
84 resume or a frame cache destruct. It of course assumes that the
85 inferior hasn't unwound the stack past that frame. */
89 /* The frame's stack address. This shall be constant through out
90 the lifetime of a frame. Note that this requirement applies to
91 not just the function body, but also the prologue and (in theory
92 at least) the epilogue. Since that value needs to fall either on
93 the boundary, or within the frame's address range, the frame's
94 outer-most address (the inner-most address of the previous frame)
95 is used. Watch out for all the legacy targets that still use the
96 function pointer register or stack pointer register. They are
99 /* The frame's code address. This shall be constant through out the
100 lifetime of the frame. While the PC (a.k.a. resume address)
101 changes as the function is executed, this code address cannot.
102 Typically, it is set to the address of the entry point of the
103 frame's function (as returned by frame_func_unwind(). */
105 /* The frame's special address. This shall be constant through out the
106 lifetime of the frame. This is used for architectures that may have
107 frames that do not change the stack but are still distinct and have
108 some form of distinct identifier (e.g. the ia64 which uses a 2nd
109 stack for registers). This field is treated as unordered - i.e. will
110 not be used in frame ordering comparisons such as frame_id_inner().
111 A zero in this field will be treated as a wild-card when comparing
112 frames for equality. */
113 CORE_ADDR special_addr;
116 /* Methods for constructing and comparing Frame IDs.
118 NOTE: Given stackless functions A and B, where A calls B (and hence
119 B is inner-to A). The relationships: !eq(A,B); !eq(B,A);
120 !inner(A,B); !inner(B,A); all hold.
122 This is because, while B is inner-to A, B is not strictly inner-to A.
123 Being stackless, they have an identical .stack_addr value, and differ
124 only by their unordered .code_addr and/or .special_addr values.
126 Because frame_id_inner is only used as a safety net (e.g.,
127 detect a corrupt stack) the lack of strictness is not a problem.
128 Code needing to determine an exact relationship between two frames
129 must instead use frame_id_eq and frame_id_unwind. For instance,
130 in the above, to determine that A stepped-into B, the equation
131 "A.id != B.id && A.id == id_unwind (B)" can be used. */
133 /* For convenience. All fields are zero. */
134 extern const struct frame_id null_frame_id;
136 /* Construct a frame ID. The first parameter is the frame's constant
137 stack address (typically the outer-bound), and the second the
138 frame's constant code address (typically the entry point) (or zero,
139 to indicate a wild card). The special identifier address is
140 defaulted to zero. */
141 extern struct frame_id frame_id_build (CORE_ADDR stack_addr,
142 CORE_ADDR code_addr);
144 /* Construct a special frame ID. The first parameter is the frame's constant
145 stack address (typically the outer-bound), the second is the
146 frame's constant code address (typically the entry point) (or zero,
147 to indicate a wild card), and the third parameter is the frame's
148 special identifier address (or zero to indicate a wild card or
150 extern struct frame_id frame_id_build_special (CORE_ADDR stack_addr,
152 CORE_ADDR special_addr);
154 /* Returns non-zero when L is a valid frame (a valid frame has a
156 extern int frame_id_p (struct frame_id l);
158 /* Returns non-zero when L and R identify the same frame, or, if
159 either L or R have a zero .func, then the same frame base. */
160 extern int frame_id_eq (struct frame_id l, struct frame_id r);
162 /* Returns non-zero when L is strictly inner-than R (they have
163 different frame .bases). Neither L, nor R can be `null'. See note
164 above about frameless functions. */
165 extern int frame_id_inner (struct frame_id l, struct frame_id r);
167 /* Write the internal representation of a frame ID on the specified
169 extern void fprint_frame_id (struct ui_file *file, struct frame_id id);
172 /* For every stopped thread, GDB tracks two frames: current and
173 selected. Current frame is the inner most frame of the selected
174 thread. Selected frame is the one being examined by the the GDB
175 CLI (selected using `up', `down', ...). The frames are created
176 on-demand (via get_prev_frame()) and then held in a frame cache. */
177 /* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
178 sequence: `thread 1; up; thread 2; thread 1' you loose thread 1's
179 selected frame. At present GDB only tracks the selected frame of
180 the current thread. But be warned, that might change. */
181 /* FIXME: cagney/2002-11-14: At any time, only one thread's selected
182 and current frame can be active. Switching threads causes gdb to
183 discard all that cached frame information. Ulgh! Instead, current
184 and selected frame should be bound to a thread. */
186 /* On demand, create the inner most frame using information found in
187 the inferior. If the inner most frame can't be created, throw an
189 extern struct frame_info *get_current_frame (void);
191 /* Invalidates the frame cache (this function should have been called
192 invalidate_cached_frames).
194 FIXME: cagney/2002-11-28: The only difference between
195 flush_cached_frames() and reinit_frame_cache() is that the latter
196 explicitly sets the selected frame back to the current frame there
197 isn't any real difference (except that one delays the selection of
198 a new frame). Code can instead simply rely on get_selected_frame()
199 to reinit's the selected frame as needed. As for invalidating the
200 cache, there should be two methods one that reverts the thread's
201 selected frame back to current frame (for when the inferior
202 resumes) and one that does not (for when the user modifies the
203 target invalidating the frame cache). */
204 extern void flush_cached_frames (void);
205 extern void reinit_frame_cache (void);
207 /* On demand, create the selected frame and then return it. If the
208 selected frame can not be created, this function throws an error. */
209 /* FIXME: cagney/2002-11-28: At present, when there is no selected
210 frame, this function always returns the current (inner most) frame.
211 It should instead, when a thread has previously had its frame
212 selected (but not resumed) and the frame cache invalidated, find
213 and then return that thread's previously selected frame. */
214 extern struct frame_info *get_selected_frame (void);
216 /* Select a specific frame. NULL, apparently implies re-select the
218 extern void select_frame (struct frame_info *);
220 /* Given a FRAME, return the next (more inner, younger) or previous
221 (more outer, older) frame. */
222 extern struct frame_info *get_prev_frame (struct frame_info *);
223 extern struct frame_info *get_next_frame (struct frame_info *);
225 /* Given a frame's ID, relocate the frame. Returns NULL if the frame
227 extern struct frame_info *frame_find_by_id (struct frame_id id);
229 /* Base attributes of a frame: */
231 /* The frame's `resume' address. Where the program will resume in
234 This replaced: frame->pc; */
235 extern CORE_ADDR get_frame_pc (struct frame_info *);
237 /* An address (not necessarily alligned to an instruction boundary)
238 that falls within THIS frame's code block.
240 When a function call is the last statement in a block, the return
241 address for the call may land at the start of the next block.
242 Similarly, if a no-return function call is the last statement in
243 the function, the return address may end up pointing beyond the
244 function, and possibly at the start of the next function.
246 These methods make an allowance for this. For call frames, this
247 function returns the frame's PC-1 which "should" be an address in
248 the frame's block. */
250 extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame);
251 extern CORE_ADDR frame_unwind_address_in_block (struct frame_info *next_frame);
253 /* The frame's inner-most bound. AKA the stack-pointer. Confusingly
254 known as top-of-stack. */
256 extern CORE_ADDR get_frame_sp (struct frame_info *);
257 extern CORE_ADDR frame_sp_unwind (struct frame_info *);
260 /* Following on from the `resume' address. Return the entry point
261 address of the function containing that resume address, or zero if
262 that function isn't known. */
263 extern CORE_ADDR frame_func_unwind (struct frame_info *fi);
264 extern CORE_ADDR get_frame_func (struct frame_info *fi);
266 /* Closely related to the resume address, various symbol table
267 attributes that are determined by the PC. Note that for a normal
268 frame, the PC refers to the resume address after the return, and
269 not the call instruction. In such a case, the address is adjusted
270 so that it (approximatly) identifies the call site (and not return
273 NOTE: cagney/2002-11-28: The frame cache could be used to cache the
274 computed value. Working on the assumption that the bottle-neck is
275 in the single step code, and that code causes the frame cache to be
276 constantly flushed, caching things in a frame is probably of little
277 benefit. As they say `show us the numbers'.
279 NOTE: cagney/2002-11-28: Plenty more where this one came from:
280 find_frame_block(), find_frame_partial_function(),
281 find_frame_symtab(), find_frame_function(). Each will need to be
282 carefully considered to determine if the real intent was for it to
283 apply to the PC or the adjusted PC. */
284 extern void find_frame_sal (struct frame_info *frame,
285 struct symtab_and_line *sal);
287 /* Return the frame base (what ever that is) (DEPRECATED).
289 Old code was trying to use this single method for two conflicting
290 purposes. Such code needs to be updated to use either of:
292 get_frame_id: A low level frame unique identifier, that consists of
293 both a stack and a function address, that can be used to uniquely
294 identify a frame. This value is determined by the frame's
295 low-level unwinder, the stack part [typically] being the
296 top-of-stack of the previous frame, and the function part being the
297 function's start address. Since the correct identification of a
298 frameless function requires both the a stack and function address,
299 the old get_frame_base method was not sufficient.
301 get_frame_base_address: get_frame_locals_address:
302 get_frame_args_address: A set of high-level debug-info dependant
303 addresses that fall within the frame. These addresses almost
304 certainly will not match the stack address part of a frame ID (as
305 returned by get_frame_base).
307 This replaced: frame->frame; */
309 extern CORE_ADDR get_frame_base (struct frame_info *);
311 /* Return the per-frame unique identifer. Can be used to relocate a
312 frame after a frame cache flush (and other similar operations). If
313 FI is NULL, return the null_frame_id. */
314 extern struct frame_id get_frame_id (struct frame_info *fi);
316 /* Assuming that a frame is `normal', return its base-address, or 0 if
317 the information isn't available. NOTE: This address is really only
318 meaningful to the frame's high-level debug info. */
319 extern CORE_ADDR get_frame_base_address (struct frame_info *);
321 /* Assuming that a frame is `normal', return the base-address of the
322 local variables, or 0 if the information isn't available. NOTE:
323 This address is really only meaningful to the frame's high-level
324 debug info. Typically, the argument and locals share a single
326 extern CORE_ADDR get_frame_locals_address (struct frame_info *);
328 /* Assuming that a frame is `normal', return the base-address of the
329 parameter list, or 0 if that information isn't available. NOTE:
330 This address is really only meaningful to the frame's high-level
331 debug info. Typically, the argument and locals share a single
333 extern CORE_ADDR get_frame_args_address (struct frame_info *);
335 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
336 for an invalid frame). */
337 extern int frame_relative_level (struct frame_info *fi);
339 /* Return the frame's type. Some are real, some are signal
340 trampolines, and some are completely artificial (dummy). */
344 /* The frame's type hasn't yet been defined. This is a catch-all
345 for legacy code that uses really strange technicques, such as
346 deprecated_set_frame_type, to set the frame's type. New code
347 should not use this value. */
349 /* A true stack frame, created by the target program during normal
352 /* A fake frame, created by GDB when performing an inferior function
355 /* In a signal handler, various OSs handle this in various ways.
356 The main thing is that the frame may be far from normal. */
359 extern enum frame_type get_frame_type (struct frame_info *);
361 /* FIXME: cagney/2002-11-10: Some targets want to directly mark a
362 frame as being of a specific type. This shouldn't be necessary.
363 PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
364 DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
365 the real problem here is that get_prev_frame() only sets
366 initialized after DEPRECATED_INIT_EXTRA_FRAME_INFO as been called.
367 Consequently, some targets found that the frame's type was wrong
368 and tried to fix it. The correct fix is to modify get_prev_frame()
369 so that it initializes the frame's type before calling any other
371 extern void deprecated_set_frame_type (struct frame_info *,
372 enum frame_type type);
374 /* Unwind the stack frame so that the value of REGNUM, in the previous
375 (up, older) frame is returned. If VALUEP is NULL, don't
376 fetch/compute the value. Instead just return the location of the
378 extern void frame_register_unwind (struct frame_info *frame, int regnum,
379 int *optimizedp, enum lval_type *lvalp,
380 CORE_ADDR *addrp, int *realnump,
383 /* Fetch a register from this, or unwind a register from the next
384 frame. Note that the get_frame methods are wrappers to
385 frame->next->unwind. They all [potentially] throw an error if the
388 extern void frame_unwind_register (struct frame_info *frame,
389 int regnum, void *buf);
390 extern void get_frame_register (struct frame_info *frame,
391 int regnum, void *buf);
393 extern LONGEST frame_unwind_register_signed (struct frame_info *frame,
395 extern LONGEST get_frame_register_signed (struct frame_info *frame,
397 extern ULONGEST frame_unwind_register_unsigned (struct frame_info *frame,
399 extern ULONGEST get_frame_register_unsigned (struct frame_info *frame,
403 /* Use frame_unwind_register_signed. */
404 extern void frame_unwind_unsigned_register (struct frame_info *frame,
405 int regnum, ULONGEST *val);
407 /* Get the value of the register that belongs to this FRAME. This
408 function is a wrapper to the call sequence ``frame_unwind_register
409 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
410 VALUEP is NULL, the registers value is not fetched/computed. */
412 extern void frame_register (struct frame_info *frame, int regnum,
413 int *optimizedp, enum lval_type *lvalp,
414 CORE_ADDR *addrp, int *realnump,
417 /* The reverse. Store a register value relative to the specified
418 frame. Note: this call makes the frame's state undefined. The
419 register and frame caches must be flushed. */
420 extern void put_frame_register (struct frame_info *frame, int regnum,
423 /* Map between a frame register number and its name. A frame register
424 space is a superset of the cooked register space --- it also
425 includes builtin registers. If NAMELEN is negative, use the NAME's
426 length when doing the comparison. */
428 extern int frame_map_name_to_regnum (struct frame_info *frame,
429 const char *name, int namelen);
430 extern const char *frame_map_regnum_to_name (struct frame_info *frame,
433 /* Unwind the PC. Strictly speaking return the resume address of the
434 calling frame. For GDB, `pc' is the resume address and not a
435 specific register. */
437 extern CORE_ADDR frame_pc_unwind (struct frame_info *frame);
439 /* Discard the specified frame. Restoring the registers to the state
441 extern void frame_pop (struct frame_info *frame);
443 /* Return memory from the specified frame. A frame knows its thread /
444 LWP and hence can find its way down to a target. The assumption
445 here is that the current and previous frame share a common address
448 If the memory read fails, these methods throw an error.
450 NOTE: cagney/2003-06-03: Should there be unwind versions of these
451 methods? That isn't clear. Can code, for instance, assume that
452 this and the previous frame's memory or architecture are identical?
453 If architecture / memory changes are always separated by special
454 adaptor frames this should be ok. */
456 extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
458 extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
459 CORE_ADDR memaddr, int len);
460 extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
461 CORE_ADDR memaddr, int len);
463 /* Return this frame's architecture. */
465 extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);
468 /* Values for the source flag to be used in print_frame_info_base(). */
471 /* Print only the source line, like in stepi. */
473 /* Print only the location, i.e. level, address (sometimes)
474 function, args, file, line, line num. */
476 /* Print both of the above. */
478 /* Print location only, but always include the address. */
482 /* Allocate additional space for appendices to a struct frame_info.
483 NOTE: Much of GDB's code works on the assumption that the allocated
484 saved_regs[] array is the size specified below. If you try to make
485 that array smaller, GDB will happily walk off its end. */
487 #ifdef SIZEOF_FRAME_SAVED_REGS
488 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
490 #define SIZEOF_FRAME_SAVED_REGS \
491 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
493 /* Allocate zero initialized memory from the frame cache obstack.
494 Appendices to the frame info (such as the unwind cache) should
495 allocate memory using this method. */
497 extern void *frame_obstack_zalloc (unsigned long size);
498 #define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
499 #define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
501 /* If legacy_frame_chain_valid() returns zero it means that the given
502 frame is the outermost one and has no caller.
504 This method has been superseeded by the per-architecture
505 frame_unwind_pc() (returns 0 to indicate an invalid return address)
506 and per-frame this_id() (returns a NULL frame ID to indicate an
508 extern int legacy_frame_chain_valid (CORE_ADDR, struct frame_info *);
510 extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
512 extern struct block *get_frame_block (struct frame_info *,
513 CORE_ADDR *addr_in_block);
515 /* Return the `struct block' that belongs to the selected thread's
516 selected frame. If the inferior has no state, return NULL.
518 NOTE: cagney/2002-11-29:
520 No state? Does the inferior have any execution state (a core file
521 does, an executable does not). At present the code tests
522 `target_has_stack' but I'm left wondering if it should test
523 `target_has_registers' or, even, a merged target_has_state.
525 Should it look at the most recently specified SAL? If the target
526 has no state, should this function try to extract a block from the
527 most recently selected SAL? That way `list foo' would give it some
528 sort of reference point. Then again, perhaphs that would confuse
531 Calls to this function can be broken down into two categories: Code
532 that uses the selected block as an additional, but optional, data
533 point; Code that uses the selected block as a prop, when it should
534 have the relevant frame/block/pc explicitly passed in.
536 The latter can be eliminated by correctly parameterizing the code,
537 the former though is more interesting. Per the "address" command,
538 it occures in the CLI code and makes it possible for commands to
539 work, even when the inferior has no state. */
541 extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
543 extern struct symbol *get_frame_function (struct frame_info *);
545 extern CORE_ADDR get_pc_function_start (CORE_ADDR);
547 extern int frameless_look_for_prologue (struct frame_info *);
549 extern struct frame_info *find_relative_frame (struct frame_info *, int *);
551 extern void show_and_print_stack_frame (struct frame_info *fi, int level,
554 extern void print_stack_frame (struct frame_info *, int, int);
556 extern void show_stack_frame (struct frame_info *);
558 extern void print_frame_info (struct frame_info *, int, int, int);
560 extern void show_frame_info (struct frame_info *, int, int, int);
562 extern struct frame_info *block_innermost_frame (struct block *);
564 /* NOTE: cagney/2002-09-13: There is no need for this function. */
565 extern CORE_ADDR deprecated_read_register_dummy (CORE_ADDR pc,
567 extern void generic_push_dummy_frame (void);
568 extern void generic_pop_current_frame (void (*)(struct frame_info *));
569 extern void generic_pop_dummy_frame (void);
571 extern int generic_pc_in_call_dummy (CORE_ADDR pc,
572 CORE_ADDR sp, CORE_ADDR fp);
574 /* NOTE: cagney/2002-06-26: Targets should no longer use this
575 function. Instead, the contents of a dummy frames registers can be
576 obtained by applying: frame_register_unwind to the dummy frame; or
577 frame_register_unwind() to the next outer frame. */
579 extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
582 /* The DEPRECATED_GET_SAVED_REGISTER architecture interface is
583 entirely redundant. New architectures should implement per-frame
584 unwinders (ref "frame-unwind.h"). */
585 extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR *,
586 struct frame_info *, int,
589 extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
591 /* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
592 function called get_frame_register_p(). This slightly weird (and
593 older) variant of get_frame_register() returns zero (indicating the
594 register is unavailable) if either: the register isn't cached; or
595 the register has been optimized out. Problem is, neither check is
596 exactly correct. A register can't be optimized out (it may not
597 have been saved as part of a function call); The fact that a
598 register isn't in the register cache doesn't mean that the register
599 isn't available (it could have been fetched from memory). */
601 extern int frame_register_read (struct frame_info *frame, int regnum,
605 extern void args_info (char *, int);
607 extern void locals_info (char *, int);
609 extern void (*selected_frame_level_changed_hook) (int);
611 extern void return_command (char *, int);
614 /* NOTE: cagney/2002-11-27:
616 You might think that the below global can simply be replaced by a
617 call to either get_selected_frame() or select_frame().
619 Unfortunately, it isn't that easy.
621 The relevant code needs to be audited to determine if it is
622 possible (or pratical) to instead pass the applicable frame in as a
623 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
624 the deprecated_selected_frame global, while its replacement,
625 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
626 The only real exceptions occure at the edge (in the CLI code) where
627 user commands need to pick up the selected frame before proceeding.
629 This is important. GDB is trying to stamp out the hack:
631 saved_frame = deprecated_selected_frame;
632 deprecated_selected_frame = ...;
633 hack_using_global_selected_frame ();
634 deprecated_selected_frame = saved_frame;
638 extern struct frame_info *deprecated_selected_frame;
640 /* NOTE: drow/2003-09-06:
642 This function is "a step sideways" for uses of deprecated_selected_frame.
643 They should be fixed as above, but meanwhile, we needed a solution for
644 cases where functions are called with a NULL frame meaning either "the
645 program is not running" or "use the selected frame". Lazy building of
646 deprecated_selected_frame confuses the situation, because now
647 deprecated_selected_frame can be NULL even when the inferior is running.
649 This function calls get_selected_frame if the inferior should have a
650 frame, or returns NULL otherwise. */
652 extern struct frame_info *deprecated_safe_get_selected_frame (void);
654 /* Create a frame using the specified BASE and PC. */
656 extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
659 /* Create/access the frame's `extra info'. The extra info is used by
660 older code to store information such as the analyzed prologue. The
661 zalloc() should only be called by the INIT_EXTRA_INFO method. */
663 extern struct frame_extra_info *frame_extra_info_zalloc (struct frame_info *fi,
665 extern struct frame_extra_info *get_frame_extra_info (struct frame_info *fi);
667 /* Create/access the frame's `saved_regs'. The saved regs are used by
668 older code to store the address of each register (except for
669 SP_REGNUM where the value of the register in the previous frame is
671 extern CORE_ADDR *frame_saved_regs_zalloc (struct frame_info *);
672 extern CORE_ADDR *deprecated_get_frame_saved_regs (struct frame_info *);
674 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
675 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
676 the initial frame create. This puts things back in sync.
678 This replaced: frame->pc = ....; */
679 extern void deprecated_update_frame_pc_hack (struct frame_info *frame,
682 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
683 more exact, was that initial guess at the frame's base as returned
684 by deprecated_read_fp() wrong? If it was, fix it. This shouldn't
685 be necessary since the code should be getting the frame's base
686 correct from the outset.
688 This replaced: frame->frame = ....; */
689 extern void deprecated_update_frame_base_hack (struct frame_info *frame,
692 /* FIXME: cagney/2003-01-05: Allocate a frame, along with the
693 saved_regs and extra_info. Set up cleanups for all three. Same as
694 for deprecated_frame_xmalloc, targets are calling this when
695 creating a scratch `struct frame_info'. The frame overhaul makes
696 this unnecessary since all frame queries are parameterized with a
697 common cache parameter and a frame. */
698 extern struct frame_info *deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
699 long sizeof_extra_info);
701 /* Return non-zero if the architecture is relying on legacy frame
703 extern int legacy_frame_p (struct gdbarch *gdbarch);
705 #endif /* !defined (FRAME_H) */