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 / non-NULL if the
44 request succeeds, zero / NULL otherwize.
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 lose 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 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 aligned 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 (approximately) identifies the call site (and not the
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.
315 NOTE: kettenis/20040508: These functions return a structure. On
316 platforms where structures are returned in static storage (vax,
317 m68k), this may trigger compiler bugs in code like:
319 if (frame_id_eq (get_frame_id (l), get_frame_id (r)))
321 where the return value from the first get_frame_id (l) gets
322 overwritten by the second get_frame_id (r). Please avoid writing
323 code like this. Use code like:
325 struct frame_id id = get_frame_id (l);
326 if (frame_id_eq (id, get_frame_id (r)))
328 instead, since that avoids the bug. */
329 extern struct frame_id
get_frame_id (struct frame_info
*fi
);
330 extern struct frame_id
frame_unwind_id (struct frame_info
*next_frame
);
332 /* Assuming that a frame is `normal', return its base-address, or 0 if
333 the information isn't available. NOTE: This address is really only
334 meaningful to the frame's high-level debug info. */
335 extern CORE_ADDR
get_frame_base_address (struct frame_info
*);
337 /* Assuming that a frame is `normal', return the base-address of the
338 local variables, or 0 if the information isn't available. NOTE:
339 This address is really only meaningful to the frame's high-level
340 debug info. Typically, the argument and locals share a single
342 extern CORE_ADDR
get_frame_locals_address (struct frame_info
*);
344 /* Assuming that a frame is `normal', return the base-address of the
345 parameter list, or 0 if that information isn't available. NOTE:
346 This address is really only meaningful to the frame's high-level
347 debug info. Typically, the argument and locals share a single
349 extern CORE_ADDR
get_frame_args_address (struct frame_info
*);
351 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
352 for an invalid frame). */
353 extern int frame_relative_level (struct frame_info
*fi
);
355 /* Return the frame's type. Some are real, some are signal
356 trampolines, and some are completely artificial (dummy). */
360 /* The frame's type hasn't yet been defined. This is a catch-all
361 for legacy_get_prev_frame that uses really strange techniques to
362 determine the frame's type. New code should not use this
365 /* A true stack frame, created by the target program during normal
368 /* A fake frame, created by GDB when performing an inferior function
371 /* In a signal handler, various OSs handle this in various ways.
372 The main thing is that the frame may be far from normal. */
374 /* Sentinel or registers frame. This frame obtains register values
375 direct from the inferior's registers. */
378 extern enum frame_type
get_frame_type (struct frame_info
*);
380 /* Unwind the stack frame so that the value of REGNUM, in the previous
381 (up, older) frame is returned. If VALUEP is NULL, don't
382 fetch/compute the value. Instead just return the location of the
384 extern void frame_register_unwind (struct frame_info
*frame
, int regnum
,
385 int *optimizedp
, enum lval_type
*lvalp
,
386 CORE_ADDR
*addrp
, int *realnump
,
389 /* Fetch a register from this, or unwind a register from the next
390 frame. Note that the get_frame methods are wrappers to
391 frame->next->unwind. They all [potentially] throw an error if the
394 extern void frame_unwind_register (struct frame_info
*frame
,
395 int regnum
, void *buf
);
396 extern void get_frame_register (struct frame_info
*frame
,
397 int regnum
, void *buf
);
399 extern LONGEST
frame_unwind_register_signed (struct frame_info
*frame
,
401 extern LONGEST
get_frame_register_signed (struct frame_info
*frame
,
403 extern ULONGEST
frame_unwind_register_unsigned (struct frame_info
*frame
,
405 extern ULONGEST
get_frame_register_unsigned (struct frame_info
*frame
,
409 /* Use frame_unwind_register_signed. */
410 extern void frame_unwind_unsigned_register (struct frame_info
*frame
,
411 int regnum
, ULONGEST
*val
);
413 /* Get the value of the register that belongs to this FRAME. This
414 function is a wrapper to the call sequence ``frame_unwind_register
415 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
416 VALUEP is NULL, the registers value is not fetched/computed. */
418 extern void frame_register (struct frame_info
*frame
, int regnum
,
419 int *optimizedp
, enum lval_type
*lvalp
,
420 CORE_ADDR
*addrp
, int *realnump
,
423 /* The reverse. Store a register value relative to the specified
424 frame. Note: this call makes the frame's state undefined. The
425 register and frame caches must be flushed. */
426 extern void put_frame_register (struct frame_info
*frame
, int regnum
,
429 /* Map between a frame register number and its name. A frame register
430 space is a superset of the cooked register space --- it also
431 includes builtin registers. If NAMELEN is negative, use the NAME's
432 length when doing the comparison. */
434 extern int frame_map_name_to_regnum (struct frame_info
*frame
,
435 const char *name
, int namelen
);
436 extern const char *frame_map_regnum_to_name (struct frame_info
*frame
,
439 /* Unwind the PC. Strictly speaking return the resume address of the
440 calling frame. For GDB, `pc' is the resume address and not a
441 specific register. */
443 extern CORE_ADDR
frame_pc_unwind (struct frame_info
*frame
);
445 /* Discard the specified frame. Restoring the registers to the state
447 extern void frame_pop (struct frame_info
*frame
);
449 /* Return memory from the specified frame. A frame knows its thread /
450 LWP and hence can find its way down to a target. The assumption
451 here is that the current and previous frame share a common address
454 If the memory read fails, these methods throw an error.
456 NOTE: cagney/2003-06-03: Should there be unwind versions of these
457 methods? That isn't clear. Can code, for instance, assume that
458 this and the previous frame's memory or architecture are identical?
459 If architecture / memory changes are always separated by special
460 adaptor frames this should be ok. */
462 extern void get_frame_memory (struct frame_info
*this_frame
, CORE_ADDR addr
,
464 extern LONGEST
get_frame_memory_signed (struct frame_info
*this_frame
,
465 CORE_ADDR memaddr
, int len
);
466 extern ULONGEST
get_frame_memory_unsigned (struct frame_info
*this_frame
,
467 CORE_ADDR memaddr
, int len
);
469 /* Same as above, but return non-zero when the entire memory read
470 succeeds, zero otherwize. */
471 extern int safe_frame_unwind_memory (struct frame_info
*this_frame
,
472 CORE_ADDR addr
, void *buf
, int len
);
474 /* Return this frame's architecture. */
476 extern struct gdbarch
*get_frame_arch (struct frame_info
*this_frame
);
479 /* Values for the source flag to be used in print_frame_info_base(). */
482 /* Print only the source line, like in stepi. */
484 /* Print only the location, i.e. level, address (sometimes)
485 function, args, file, line, line num. */
487 /* Print both of the above. */
489 /* Print location only, but always include the address. */
493 /* Allocate additional space for appendices to a struct frame_info.
494 NOTE: Much of GDB's code works on the assumption that the allocated
495 saved_regs[] array is the size specified below. If you try to make
496 that array smaller, GDB will happily walk off its end. */
498 #ifdef SIZEOF_FRAME_SAVED_REGS
499 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
501 #define SIZEOF_FRAME_SAVED_REGS \
502 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
504 /* Allocate zero initialized memory from the frame cache obstack.
505 Appendices to the frame info (such as the unwind cache) should
506 allocate memory using this method. */
508 extern void *frame_obstack_zalloc (unsigned long size
);
509 #define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
510 #define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
512 /* If legacy_frame_chain_valid() returns zero it means that the given
513 frame is the outermost one and has no caller.
515 This method has been superseded by the per-architecture
516 frame_unwind_pc() (returns 0 to indicate an invalid return address)
517 and per-frame this_id() (returns a NULL frame ID to indicate an
519 extern int legacy_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
521 extern void generic_save_dummy_frame_tos (CORE_ADDR sp
);
523 extern struct block
*get_frame_block (struct frame_info
*,
524 CORE_ADDR
*addr_in_block
);
526 /* Return the `struct block' that belongs to the selected thread's
527 selected frame. If the inferior has no state, return NULL.
529 NOTE: cagney/2002-11-29:
531 No state? Does the inferior have any execution state (a core file
532 does, an executable does not). At present the code tests
533 `target_has_stack' but I'm left wondering if it should test
534 `target_has_registers' or, even, a merged target_has_state.
536 Should it look at the most recently specified SAL? If the target
537 has no state, should this function try to extract a block from the
538 most recently selected SAL? That way `list foo' would give it some
539 sort of reference point. Then again, perhaps that would confuse
542 Calls to this function can be broken down into two categories: Code
543 that uses the selected block as an additional, but optional, data
544 point; Code that uses the selected block as a prop, when it should
545 have the relevant frame/block/pc explicitly passed in.
547 The latter can be eliminated by correctly parameterizing the code,
548 the former though is more interesting. Per the "address" command,
549 it occurs in the CLI code and makes it possible for commands to
550 work, even when the inferior has no state. */
552 extern struct block
*get_selected_block (CORE_ADDR
*addr_in_block
);
554 extern struct symbol
*get_frame_function (struct frame_info
*);
556 extern CORE_ADDR
get_pc_function_start (CORE_ADDR
);
558 extern int legacy_frameless_look_for_prologue (struct frame_info
*);
560 extern struct frame_info
*find_relative_frame (struct frame_info
*, int *);
562 extern void show_and_print_stack_frame (struct frame_info
*fi
, int print_level
,
563 enum print_what print_what
);
565 extern void print_stack_frame (struct frame_info
*, int print_level
,
566 enum print_what print_what
);
568 extern void show_stack_frame (struct frame_info
*);
570 extern void print_frame_info (struct frame_info
*, int print_level
,
571 enum print_what print_what
, int args
);
573 extern struct frame_info
*block_innermost_frame (struct block
*);
575 /* NOTE: cagney/2002-09-13: There is no need for this function. */
576 extern CORE_ADDR
deprecated_read_register_dummy (CORE_ADDR pc
,
578 extern void generic_push_dummy_frame (void);
579 extern void deprecated_pop_dummy_frame (void);
581 extern int deprecated_pc_in_call_dummy (CORE_ADDR pc
, CORE_ADDR sp
,
584 /* NOTE: cagney/2002-06-26: Targets should no longer use this
585 function. Instead, the contents of a dummy frame register can be
586 obtained by applying: frame_register_unwind to the dummy frame; or
587 frame_register_unwind() to the next outer frame. */
589 extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc
, CORE_ADDR fp
);
592 extern void generic_save_call_dummy_addr (CORE_ADDR lo
, CORE_ADDR hi
);
594 /* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
595 function called get_frame_register_p(). This slightly weird (and
596 older) variant of get_frame_register() returns zero (indicating the
597 register is unavailable) if either: the register isn't cached; or
598 the register has been optimized out. Problem is, neither check is
599 exactly correct. A register can't be optimized out (it may not
600 have been saved as part of a function call); The fact that a
601 register isn't in the register cache doesn't mean that the register
602 isn't available (it could have been fetched from memory). */
604 extern int frame_register_read (struct frame_info
*frame
, int regnum
,
608 extern void args_info (char *, int);
610 extern void locals_info (char *, int);
612 extern void (*deprecated_selected_frame_level_changed_hook
) (int);
614 extern void return_command (char *, int);
617 /* NOTE: cagney/2002-11-27:
619 You might think that the below global can simply be replaced by a
620 call to either get_selected_frame() or select_frame().
622 Unfortunately, it isn't that easy.
624 The relevant code needs to be audited to determine if it is
625 possible (or practical) to instead pass the applicable frame in as a
626 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
627 the deprecated_selected_frame global, while its replacement,
628 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
629 The only real exceptions occur at the edge (in the CLI code) where
630 user commands need to pick up the selected frame before proceeding.
632 This is important. GDB is trying to stamp out the hack:
634 saved_frame = deprecated_selected_frame;
635 deprecated_selected_frame = ...;
636 hack_using_global_selected_frame ();
637 deprecated_selected_frame = saved_frame;
641 extern struct frame_info
*deprecated_selected_frame
;
643 /* NOTE: drow/2003-09-06:
645 This function is "a step sideways" for uses of deprecated_selected_frame.
646 They should be fixed as above, but meanwhile, we needed a solution for
647 cases where functions are called with a NULL frame meaning either "the
648 program is not running" or "use the selected frame". Lazy building of
649 deprecated_selected_frame confuses the situation, because now
650 deprecated_selected_frame can be NULL even when the inferior is running.
652 This function calls get_selected_frame if the inferior should have a
653 frame, or returns NULL otherwise. */
655 extern struct frame_info
*deprecated_safe_get_selected_frame (void);
657 /* Create a frame using the specified BASE and PC. */
659 extern struct frame_info
*create_new_frame (CORE_ADDR base
, CORE_ADDR pc
);
662 /* Create/access the frame's `extra info'. The extra info is used by
663 older code to store information such as the analyzed prologue. The
664 zalloc() should only be called by the INIT_EXTRA_INFO method. */
666 extern struct frame_extra_info
*frame_extra_info_zalloc (struct frame_info
*fi
,
668 extern struct frame_extra_info
*get_frame_extra_info (struct frame_info
*fi
);
670 /* Create/access the frame's `saved_regs'. The saved regs are used by
671 older code to store the address of each register (except for
672 SP_REGNUM where the value of the register in the previous frame is
674 extern CORE_ADDR
*frame_saved_regs_zalloc (struct frame_info
*);
675 extern CORE_ADDR
*deprecated_get_frame_saved_regs (struct frame_info
*);
677 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
678 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
679 the initial frame create. This puts things back in sync.
681 This replaced: frame->pc = ....; */
682 extern void deprecated_update_frame_pc_hack (struct frame_info
*frame
,
685 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
686 more exact, was that initial guess at the frame's base as returned
687 by deprecated_read_fp() wrong? If it was, fix it. This shouldn't
688 be necessary since the code should be getting the frame's base
689 correct from the outset.
691 This replaced: frame->frame = ....; */
692 extern void deprecated_update_frame_base_hack (struct frame_info
*frame
,
695 /* FIXME: cagney/2003-01-05: Allocate a frame, along with the
696 saved_regs and extra_info. Set up cleanups for all three. Same as
697 for deprecated_frame_xmalloc, targets are calling this when
698 creating a scratch `struct frame_info'. The frame overhaul makes
699 this unnecessary since all frame queries are parameterized with a
700 common cache parameter and a frame. */
701 extern struct frame_info
*deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs
,
702 long sizeof_extra_info
);
704 /* Return non-zero if the architecture is relying on legacy frame
706 extern int legacy_frame_p (struct gdbarch
*gdbarch
);
708 #endif /* !defined (FRAME_H) */