1 /* Definitions for dealing with stack frames, for GDB, the GNU debugger.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #if !defined (FRAME_H)
23 /* The following is the intended naming schema for frame functions.
24 It isn't 100% consistent, but it is aproaching that. Frame naming
29 get_frame_WHAT...(): Get WHAT from the THIS frame (functionaly
30 equivalent to THIS->next->unwind->what)
32 frame_unwind_WHAT...(): Unwind THIS frame's WHAT from the NEXT
35 frame_unwind_caller_WHAT...(): Unwind WHAT for NEXT stack frame's
36 real caller. Any inlined functions in NEXT's stack frame are
37 skipped. Use these to ignore any potentially inlined functions,
38 e.g. inlined into the first instruction of a library trampoline.
40 get_stack_frame_WHAT...(): Get WHAT for THIS frame, but if THIS is
41 inlined, skip to the containing stack frame.
43 put_frame_WHAT...(): Put a value into this frame (unsafe, need to
44 invalidate the frame / regcache afterwards) (better name more
45 strongly hinting at its unsafeness)
47 safe_....(): Safer version of various functions, doesn't throw an
48 error (leave this for later?). Returns non-zero / non-NULL if the
49 request succeeds, zero / NULL otherwize.
53 void /frame/_WHAT(): Read WHAT's value into the buffer parameter.
55 ULONGEST /frame/_WHAT_unsigned(): Return an unsigned value (the
56 alternative is *frame_unsigned_WHAT).
58 LONGEST /frame/_WHAT_signed(): Return WHAT signed value.
62 /frame/_memory* (frame, coreaddr, len [, buf]): Extract/return
65 /frame/_register* (frame, regnum [, buf]): extract/return register.
67 CORE_ADDR /frame/_{pc,sp,...} (frame): Resume address, innner most
72 struct symtab_and_line;
79 /* The frame object. */
83 /* The frame object's ID. This provides a per-frame unique identifier
84 that can be used to relocate a `struct frame_info' after a target
85 resume or a frame cache destruct. It of course assumes that the
86 inferior hasn't unwound the stack past that frame. */
90 /* The frame's stack address. This shall be constant through out
91 the lifetime of a frame. Note that this requirement applies to
92 not just the function body, but also the prologue and (in theory
93 at least) the epilogue. Since that value needs to fall either on
94 the boundary, or within the frame's address range, the frame's
95 outer-most address (the inner-most address of the previous frame)
96 is used. Watch out for all the legacy targets that still use the
97 function pointer register or stack pointer register. They are
100 This field is valid only if stack_addr_p is true. Otherwise, this
101 frame represents the null frame. */
102 CORE_ADDR stack_addr;
104 /* The frame's code address. This shall be constant through out the
105 lifetime of the frame. While the PC (a.k.a. resume address)
106 changes as the function is executed, this code address cannot.
107 Typically, it is set to the address of the entry point of the
108 frame's function (as returned by get_frame_func).
110 For inlined functions (INLINE_DEPTH != 0), this is the address of
111 the first executed instruction in the block corresponding to the
114 This field is valid only if code_addr_p is true. Otherwise, this
115 frame is considered to have a wildcard code address, i.e. one that
116 matches every address value in frame comparisons. */
119 /* The frame's special address. This shall be constant through out the
120 lifetime of the frame. This is used for architectures that may have
121 frames that do not change the stack but are still distinct and have
122 some form of distinct identifier (e.g. the ia64 which uses a 2nd
123 stack for registers). This field is treated as unordered - i.e. will
124 not be used in frame ordering comparisons.
126 This field is valid only if special_addr_p is true. Otherwise, this
127 frame is considered to have a wildcard special address, i.e. one that
128 matches every address value in frame comparisons. */
129 CORE_ADDR special_addr;
131 /* Flags to indicate the above fields have valid contents. */
132 unsigned int stack_addr_p : 1;
133 unsigned int code_addr_p : 1;
134 unsigned int special_addr_p : 1;
136 /* It is non-zero for a frame made up by GDB without stack data
137 representation in inferior, such as INLINE_FRAME or TAILCALL_FRAME.
138 Caller of inlined function will have it zero, each more inner called frame
139 will have it increasingly one, two etc. Similarly for TAILCALL_FRAME. */
140 int artificial_depth;
143 /* Methods for constructing and comparing Frame IDs. */
145 /* For convenience. All fields are zero. This means "there is no frame". */
146 extern const struct frame_id null_frame_id;
148 /* This means "there is no frame ID, but there is a frame". It should be
149 replaced by best-effort frame IDs for the outermost frame, somehow.
150 The implementation is only special_addr_p set. */
151 extern const struct frame_id outer_frame_id;
153 /* Flag to control debugging. */
155 extern unsigned int frame_debug;
157 /* Construct a frame ID. The first parameter is the frame's constant
158 stack address (typically the outer-bound), and the second the
159 frame's constant code address (typically the entry point).
160 The special identifier address is set to indicate a wild card. */
161 extern struct frame_id frame_id_build (CORE_ADDR stack_addr,
162 CORE_ADDR code_addr);
164 /* Construct a special frame ID. The first parameter is the frame's constant
165 stack address (typically the outer-bound), the second is the
166 frame's constant code address (typically the entry point),
167 and the third parameter is the frame's special identifier address. */
168 extern struct frame_id frame_id_build_special (CORE_ADDR stack_addr,
170 CORE_ADDR special_addr);
172 /* Construct a wild card frame ID. The parameter is the frame's constant
173 stack address (typically the outer-bound). The code address as well
174 as the special identifier address are set to indicate wild cards. */
175 extern struct frame_id frame_id_build_wild (CORE_ADDR stack_addr);
177 /* Returns non-zero when L is a valid frame (a valid frame has a
178 non-zero .base). The outermost frame is valid even without an
180 extern int frame_id_p (struct frame_id l);
182 /* Returns non-zero when L is a valid frame representing a frame made up by GDB
183 without stack data representation in inferior, such as INLINE_FRAME or
185 extern int frame_id_artificial_p (struct frame_id l);
187 /* Returns non-zero when L and R identify the same frame, or, if
188 either L or R have a zero .func, then the same frame base. */
189 extern int frame_id_eq (struct frame_id l, struct frame_id r);
191 /* Write the internal representation of a frame ID on the specified
193 extern void fprint_frame_id (struct ui_file *file, struct frame_id id);
196 /* Frame types. Some are real, some are signal trampolines, and some
197 are completely artificial (dummy). */
201 /* A true stack frame, created by the target program during normal
204 /* A fake frame, created by GDB when performing an inferior function
207 /* A frame representing an inlined function, associated with an
208 upcoming (prev, outer, older) NORMAL_FRAME. */
210 /* A virtual frame of a tail call - see dwarf2_tailcall_frame_unwind. */
212 /* In a signal handler, various OSs handle this in various ways.
213 The main thing is that the frame may be far from normal. */
215 /* Fake frame representing a cross-architecture call. */
217 /* Sentinel or registers frame. This frame obtains register values
218 direct from the inferior's registers. */
222 /* For every stopped thread, GDB tracks two frames: current and
223 selected. Current frame is the inner most frame of the selected
224 thread. Selected frame is the one being examined by the GDB
225 CLI (selected using `up', `down', ...). The frames are created
226 on-demand (via get_prev_frame()) and then held in a frame cache. */
227 /* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
228 sequence: `thread 1; up; thread 2; thread 1' you lose thread 1's
229 selected frame. At present GDB only tracks the selected frame of
230 the current thread. But be warned, that might change. */
231 /* FIXME: cagney/2002-11-14: At any time, only one thread's selected
232 and current frame can be active. Switching threads causes gdb to
233 discard all that cached frame information. Ulgh! Instead, current
234 and selected frame should be bound to a thread. */
236 /* On demand, create the inner most frame using information found in
237 the inferior. If the inner most frame can't be created, throw an
239 extern struct frame_info *get_current_frame (void);
241 /* Does the current target interface have enough state to be able to
242 query the current inferior for frame info, and is the inferior in a
243 state where that is possible? */
244 extern int has_stack_frames (void);
246 /* Invalidates the frame cache (this function should have been called
247 invalidate_cached_frames).
249 FIXME: cagney/2002-11-28: There should be two methods: one that
250 reverts the thread's selected frame back to current frame (for when
251 the inferior resumes) and one that does not (for when the user
252 modifies the target invalidating the frame cache). */
253 extern void reinit_frame_cache (void);
255 /* On demand, create the selected frame and then return it. If the
256 selected frame can not be created, this function prints then throws
257 an error. When MESSAGE is non-NULL, use it for the error message,
258 otherwize use a generic error message. */
259 /* FIXME: cagney/2002-11-28: At present, when there is no selected
260 frame, this function always returns the current (inner most) frame.
261 It should instead, when a thread has previously had its frame
262 selected (but not resumed) and the frame cache invalidated, find
263 and then return that thread's previously selected frame. */
264 extern struct frame_info *get_selected_frame (const char *message);
266 /* If there is a selected frame, return it. Otherwise, return NULL. */
267 extern struct frame_info *get_selected_frame_if_set (void);
269 /* Select a specific frame. NULL, apparently implies re-select the
271 extern void select_frame (struct frame_info *);
273 /* Given a FRAME, return the next (more inner, younger) or previous
274 (more outer, older) frame. */
275 extern struct frame_info *get_prev_frame (struct frame_info *);
276 extern struct frame_info *get_next_frame (struct frame_info *);
278 /* Given a frame's ID, relocate the frame. Returns NULL if the frame
280 extern struct frame_info *frame_find_by_id (struct frame_id id);
282 /* Base attributes of a frame: */
284 /* The frame's `resume' address. Where the program will resume in
287 This replaced: frame->pc; */
288 extern CORE_ADDR get_frame_pc (struct frame_info *);
290 /* Same as get_frame_pc, but return a boolean indication of whether
291 the PC is actually available, instead of throwing an error. */
293 extern int get_frame_pc_if_available (struct frame_info *frame,
296 /* An address (not necessarily aligned to an instruction boundary)
297 that falls within THIS frame's code block.
299 When a function call is the last statement in a block, the return
300 address for the call may land at the start of the next block.
301 Similarly, if a no-return function call is the last statement in
302 the function, the return address may end up pointing beyond the
303 function, and possibly at the start of the next function.
305 These methods make an allowance for this. For call frames, this
306 function returns the frame's PC-1 which "should" be an address in
307 the frame's block. */
309 extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame);
311 /* Same as get_frame_address_in_block, but returns a boolean
312 indication of whether the frame address is determinable (when the
313 PC is unavailable, it will not be), instead of possibly throwing an
314 error trying to read an unavailable PC. */
317 get_frame_address_in_block_if_available (struct frame_info *this_frame,
320 /* The frame's inner-most bound. AKA the stack-pointer. Confusingly
321 known as top-of-stack. */
323 extern CORE_ADDR get_frame_sp (struct frame_info *);
325 /* Following on from the `resume' address. Return the entry point
326 address of the function containing that resume address, or zero if
327 that function isn't known. */
328 extern CORE_ADDR get_frame_func (struct frame_info *fi);
330 /* Same as get_frame_func, but returns a boolean indication of whether
331 the frame function is determinable (when the PC is unavailable, it
332 will not be), instead of possibly throwing an error trying to read
333 an unavailable PC. */
335 extern int get_frame_func_if_available (struct frame_info *fi, CORE_ADDR *);
337 /* Closely related to the resume address, various symbol table
338 attributes that are determined by the PC. Note that for a normal
339 frame, the PC refers to the resume address after the return, and
340 not the call instruction. In such a case, the address is adjusted
341 so that it (approximately) identifies the call site (and not the
344 NOTE: cagney/2002-11-28: The frame cache could be used to cache the
345 computed value. Working on the assumption that the bottle-neck is
346 in the single step code, and that code causes the frame cache to be
347 constantly flushed, caching things in a frame is probably of little
348 benefit. As they say `show us the numbers'.
350 NOTE: cagney/2002-11-28: Plenty more where this one came from:
351 find_frame_block(), find_frame_partial_function(),
352 find_frame_symtab(), find_frame_function(). Each will need to be
353 carefully considered to determine if the real intent was for it to
354 apply to the PC or the adjusted PC. */
355 extern void find_frame_sal (struct frame_info *frame,
356 struct symtab_and_line *sal);
358 /* Set the current source and line to the location given by frame
359 FRAME, if possible. When CENTER is true, adjust so the relevant
360 line is in the center of the next 'list'. */
362 void set_current_sal_from_frame (struct frame_info *, int);
364 /* Return the frame base (what ever that is) (DEPRECATED).
366 Old code was trying to use this single method for two conflicting
367 purposes. Such code needs to be updated to use either of:
369 get_frame_id: A low level frame unique identifier, that consists of
370 both a stack and a function address, that can be used to uniquely
371 identify a frame. This value is determined by the frame's
372 low-level unwinder, the stack part [typically] being the
373 top-of-stack of the previous frame, and the function part being the
374 function's start address. Since the correct identification of a
375 frameless function requires both a stack and function address,
376 the old get_frame_base method was not sufficient.
378 get_frame_base_address: get_frame_locals_address:
379 get_frame_args_address: A set of high-level debug-info dependant
380 addresses that fall within the frame. These addresses almost
381 certainly will not match the stack address part of a frame ID (as
382 returned by get_frame_base).
384 This replaced: frame->frame; */
386 extern CORE_ADDR get_frame_base (struct frame_info *);
388 /* Return the per-frame unique identifer. Can be used to relocate a
389 frame after a frame cache flush (and other similar operations). If
390 FI is NULL, return the null_frame_id.
392 NOTE: kettenis/20040508: These functions return a structure. On
393 platforms where structures are returned in static storage (vax,
394 m68k), this may trigger compiler bugs in code like:
396 if (frame_id_eq (get_frame_id (l), get_frame_id (r)))
398 where the return value from the first get_frame_id (l) gets
399 overwritten by the second get_frame_id (r). Please avoid writing
400 code like this. Use code like:
402 struct frame_id id = get_frame_id (l);
403 if (frame_id_eq (id, get_frame_id (r)))
405 instead, since that avoids the bug. */
406 extern struct frame_id get_frame_id (struct frame_info *fi);
407 extern struct frame_id get_stack_frame_id (struct frame_info *fi);
408 extern struct frame_id frame_unwind_caller_id (struct frame_info *next_frame);
410 /* Assuming that a frame is `normal', return its base-address, or 0 if
411 the information isn't available. NOTE: This address is really only
412 meaningful to the frame's high-level debug info. */
413 extern CORE_ADDR get_frame_base_address (struct frame_info *);
415 /* Assuming that a frame is `normal', return the base-address of the
416 local variables, or 0 if the information isn't available. NOTE:
417 This address is really only meaningful to the frame's high-level
418 debug info. Typically, the argument and locals share a single
420 extern CORE_ADDR get_frame_locals_address (struct frame_info *);
422 /* Assuming that a frame is `normal', return the base-address of the
423 parameter list, or 0 if that information isn't available. NOTE:
424 This address is really only meaningful to the frame's high-level
425 debug info. Typically, the argument and locals share a single
427 extern CORE_ADDR get_frame_args_address (struct frame_info *);
429 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
430 for an invalid frame). */
431 extern int frame_relative_level (struct frame_info *fi);
433 /* Return the frame's type. */
435 extern enum frame_type get_frame_type (struct frame_info *);
437 /* Return the frame's program space. */
438 extern struct program_space *get_frame_program_space (struct frame_info *);
440 /* Unwind THIS frame's program space from the NEXT frame. */
441 extern struct program_space *frame_unwind_program_space (struct frame_info *);
443 /* Return the frame's address space. */
444 extern struct address_space *get_frame_address_space (struct frame_info *);
446 /* For frames where we can not unwind further, describe why. */
448 enum unwind_stop_reason
450 #define SET(name, description) name,
451 #define FIRST_ENTRY(name) UNWIND_FIRST = name,
452 #define LAST_ENTRY(name) UNWIND_LAST = name,
453 #define FIRST_ERROR(name) UNWIND_FIRST_ERROR = name,
455 #include "unwind_stop_reasons.def"
462 /* Return the reason why we can't unwind past this frame. */
464 enum unwind_stop_reason get_frame_unwind_stop_reason (struct frame_info *);
466 /* Translate a reason code to an informative string. */
468 const char *frame_stop_reason_string (enum unwind_stop_reason);
470 /* Unwind the stack frame so that the value of REGNUM, in the previous
471 (up, older) frame is returned. If VALUEP is NULL, don't
472 fetch/compute the value. Instead just return the location of the
474 extern void frame_register_unwind (struct frame_info *frame, int regnum,
475 int *optimizedp, int *unavailablep,
476 enum lval_type *lvalp,
477 CORE_ADDR *addrp, int *realnump,
480 /* Fetch a register from this, or unwind a register from the next
481 frame. Note that the get_frame methods are wrappers to
482 frame->next->unwind. They all [potentially] throw an error if the
483 fetch fails. The value methods never return NULL, but usually
484 do return a lazy value. */
486 extern void frame_unwind_register (struct frame_info *frame,
487 int regnum, gdb_byte *buf);
488 extern void get_frame_register (struct frame_info *frame,
489 int regnum, gdb_byte *buf);
491 struct value *frame_unwind_register_value (struct frame_info *frame,
493 struct value *get_frame_register_value (struct frame_info *frame,
496 extern LONGEST frame_unwind_register_signed (struct frame_info *frame,
498 extern LONGEST get_frame_register_signed (struct frame_info *frame,
500 extern ULONGEST frame_unwind_register_unsigned (struct frame_info *frame,
502 extern ULONGEST get_frame_register_unsigned (struct frame_info *frame,
505 /* Read a register from this, or unwind a register from the next
506 frame. Note that the read_frame methods are wrappers to
507 get_frame_register_value, that do not throw if the result is
508 optimized out or unavailable. */
510 extern int read_frame_register_unsigned (struct frame_info *frame,
511 int regnum, ULONGEST *val);
513 /* Get the value of the register that belongs to this FRAME. This
514 function is a wrapper to the call sequence ``frame_register_unwind
515 (get_next_frame (FRAME))''. As per frame_register_unwind(), if
516 VALUEP is NULL, the registers value is not fetched/computed. */
518 extern void frame_register (struct frame_info *frame, int regnum,
519 int *optimizedp, int *unavailablep,
520 enum lval_type *lvalp,
521 CORE_ADDR *addrp, int *realnump,
524 /* The reverse. Store a register value relative to the specified
525 frame. Note: this call makes the frame's state undefined. The
526 register and frame caches must be flushed. */
527 extern void put_frame_register (struct frame_info *frame, int regnum,
528 const gdb_byte *buf);
530 /* Read LEN bytes from one or multiple registers starting with REGNUM
531 in frame FRAME, starting at OFFSET, into BUF. If the register
532 contents are optimized out or unavailable, set *OPTIMIZEDP,
533 *UNAVAILABLEP accordingly. */
534 extern int get_frame_register_bytes (struct frame_info *frame, int regnum,
535 CORE_ADDR offset, int len,
537 int *optimizedp, int *unavailablep);
539 /* Write LEN bytes to one or multiple registers starting with REGNUM
540 in frame FRAME, starting at OFFSET, into BUF. */
541 extern void put_frame_register_bytes (struct frame_info *frame, int regnum,
542 CORE_ADDR offset, int len,
543 const gdb_byte *myaddr);
545 /* Unwind the PC. Strictly speaking return the resume address of the
546 calling frame. For GDB, `pc' is the resume address and not a
547 specific register. */
549 extern CORE_ADDR frame_unwind_caller_pc (struct frame_info *frame);
551 /* Discard the specified frame. Restoring the registers to the state
553 extern void frame_pop (struct frame_info *frame);
555 /* Return memory from the specified frame. A frame knows its thread /
556 LWP and hence can find its way down to a target. The assumption
557 here is that the current and previous frame share a common address
560 If the memory read fails, these methods throw an error.
562 NOTE: cagney/2003-06-03: Should there be unwind versions of these
563 methods? That isn't clear. Can code, for instance, assume that
564 this and the previous frame's memory or architecture are identical?
565 If architecture / memory changes are always separated by special
566 adaptor frames this should be ok. */
568 extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
569 gdb_byte *buf, int len);
570 extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
571 CORE_ADDR memaddr, int len);
572 extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
573 CORE_ADDR memaddr, int len);
575 /* Same as above, but return non-zero when the entire memory read
576 succeeds, zero otherwize. */
577 extern int safe_frame_unwind_memory (struct frame_info *this_frame,
578 CORE_ADDR addr, gdb_byte *buf, int len);
580 /* Return this frame's architecture. */
581 extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);
583 /* Return the previous frame's architecture. */
584 extern struct gdbarch *frame_unwind_arch (struct frame_info *frame);
586 /* Return the previous frame's architecture, skipping inline functions. */
587 extern struct gdbarch *frame_unwind_caller_arch (struct frame_info *frame);
590 /* Values for the source flag to be used in print_frame_info_base(). */
593 /* Print only the source line, like in stepi. */
595 /* Print only the location, i.e. level, address (sometimes)
596 function, args, file, line, line num. */
598 /* Print both of the above. */
600 /* Print location only, but always include the address. */
604 /* Allocate zero initialized memory from the frame cache obstack.
605 Appendices to the frame info (such as the unwind cache) should
606 allocate memory using this method. */
608 extern void *frame_obstack_zalloc (unsigned long size);
609 #define FRAME_OBSTACK_ZALLOC(TYPE) \
610 ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
611 #define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) \
612 ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
614 /* Create a regcache, and copy the frame's registers into it. */
615 struct regcache *frame_save_as_regcache (struct frame_info *this_frame);
617 extern struct block *get_frame_block (struct frame_info *,
618 CORE_ADDR *addr_in_block);
620 /* Return the `struct block' that belongs to the selected thread's
621 selected frame. If the inferior has no state, return NULL.
623 NOTE: cagney/2002-11-29:
625 No state? Does the inferior have any execution state (a core file
626 does, an executable does not). At present the code tests
627 `target_has_stack' but I'm left wondering if it should test
628 `target_has_registers' or, even, a merged target_has_state.
630 Should it look at the most recently specified SAL? If the target
631 has no state, should this function try to extract a block from the
632 most recently selected SAL? That way `list foo' would give it some
633 sort of reference point. Then again, perhaps that would confuse
636 Calls to this function can be broken down into two categories: Code
637 that uses the selected block as an additional, but optional, data
638 point; Code that uses the selected block as a prop, when it should
639 have the relevant frame/block/pc explicitly passed in.
641 The latter can be eliminated by correctly parameterizing the code,
642 the former though is more interesting. Per the "address" command,
643 it occurs in the CLI code and makes it possible for commands to
644 work, even when the inferior has no state. */
646 extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
648 extern struct symbol *get_frame_function (struct frame_info *);
650 extern CORE_ADDR get_pc_function_start (CORE_ADDR);
652 extern struct frame_info *find_relative_frame (struct frame_info *, int *);
654 extern void print_stack_frame (struct frame_info *, int print_level,
655 enum print_what print_what,
656 int set_current_sal);
658 extern void print_frame_info (struct frame_info *, int print_level,
659 enum print_what print_what, int args,
660 int set_current_sal);
662 extern struct frame_info *block_innermost_frame (const struct block *);
664 extern int deprecated_frame_register_read (struct frame_info *frame, int regnum,
669 extern const char print_entry_values_no[];
670 extern const char print_entry_values_only[];
671 extern const char print_entry_values_preferred[];
672 extern const char print_entry_values_if_needed[];
673 extern const char print_entry_values_both[];
674 extern const char print_entry_values_compact[];
675 extern const char print_entry_values_default[];
676 extern const char *print_entry_values;
678 /* Inferior function parameter value read in from a frame. */
682 /* Symbol for this parameter used for example for its name. */
685 /* Value of the parameter. It is NULL if ERROR is not NULL; if both VAL and
686 ERROR are NULL this parameter's value should not be printed. */
689 /* String containing the error message, it is more usually NULL indicating no
690 error occured reading this parameter. */
693 /* One of the print_entry_values_* entries as appropriate specifically for
694 this frame_arg. It will be different from print_entry_values. With
695 print_entry_values_no this frame_arg should be printed as a normal
696 parameter. print_entry_values_only says it should be printed as entry
697 value parameter. print_entry_values_compact says it should be printed as
698 both as a normal parameter and entry values parameter having the same
699 value - print_entry_values_compact is not permitted fi ui_out_is_mi_like_p
700 (in such case print_entry_values_no and print_entry_values_only is used
701 for each parameter kind specifically. */
702 const char *entry_kind;
705 extern void read_frame_arg (struct symbol *sym, struct frame_info *frame,
706 struct frame_arg *argp,
707 struct frame_arg *entryargp);
708 extern void read_frame_local (struct symbol *sym, struct frame_info *frame,
709 struct frame_arg *argp);
711 extern void args_info (char *, int);
713 extern void locals_info (char *, int);
715 extern void (*deprecated_selected_frame_level_changed_hook) (int);
717 extern void return_command (char *, int);
719 /* Set FRAME's unwinder temporarily, so that we can call a sniffer.
720 Return a cleanup which should be called if unwinding fails, and
721 discarded if it succeeds. */
723 struct cleanup *frame_prepare_for_sniffer (struct frame_info *frame,
724 const struct frame_unwind *unwind);
726 /* Notes (cagney/2002-11-27, drow/2003-09-06):
728 You might think that calls to this function can simply be replaced by a
729 call to get_selected_frame().
731 Unfortunately, it isn't that easy.
733 The relevant code needs to be audited to determine if it is
734 possible (or practical) to instead pass the applicable frame in as a
735 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
736 the deprecated_selected_frame global, while its replacement,
737 PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
738 The only real exceptions occur at the edge (in the CLI code) where
739 user commands need to pick up the selected frame before proceeding.
741 There are also some functions called with a NULL frame meaning either "the
742 program is not running" or "use the selected frame".
744 This is important. GDB is trying to stamp out the hack:
746 saved_frame = deprecated_safe_get_selected_frame ();
748 hack_using_global_selected_frame ();
749 select_frame (saved_frame);
753 This function calls get_selected_frame if the inferior should have a
754 frame, or returns NULL otherwise. */
756 extern struct frame_info *deprecated_safe_get_selected_frame (void);
758 /* Create a frame using the specified BASE and PC. */
760 extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
762 /* Return true if the frame unwinder for frame FI is UNWINDER; false
765 extern int frame_unwinder_is (struct frame_info *fi,
766 const struct frame_unwind *unwinder);
768 #endif /* !defined (FRAME_H) */