1 /* Definitions for dealing with stack frames, for GDB, the GNU debugger. 2 3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 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. 12 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. 17 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. */ 22 23 #if !defined (FRAME_H) 24 #define FRAME_H 1 25 26 /* The following is the intended naming schema for frame functions. 27 It isn't 100% consistent, but it is aproaching that. Frame naming 28 schema: 29 30 Prefixes: 31 32 get_frame_WHAT...(): Get WHAT from the THIS frame (functionaly 33 equivalent to THIS->next->unwind->what) 34 35 frame_unwind_WHAT...(): Unwind THIS frame's WHAT from the NEXT 36 frame. 37 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) 41 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. 45 46 Suffixes: 47 48 void /frame/_WHAT(): Read WHAT's value into the buffer parameter. 49 50 ULONGEST /frame/_WHAT_unsigned(): Return an unsigned value (the 51 alternative is *frame_unsigned_WHAT). 52 53 LONGEST /frame/_WHAT_signed(): Return WHAT signed value. 54 55 What: 56 57 /frame/_memory* (frame, coreaddr, len [, buf]): Extract/return 58 *memory. 59 60 /frame/_register* (frame, regnum [, buf]): extract/return register. 61 62 CORE_ADDR /frame/_{pc,sp,...} (frame): Resume address, innner most 63 stack *address, ... 64 65 */ 66 67 struct symtab_and_line; 68 struct frame_unwind; 69 struct frame_base; 70 struct block; 71 struct gdbarch; 72 struct ui_file; 73 74 /* The frame object. */ 75 76 struct frame_info; 77 78 /* The frame object's ID. This provides a per-frame unique identifier 79 that can be used to relocate a `struct frame_info' after a target 80 resume or a frame cache destruct. It of course assumes that the 81 inferior hasn't unwound the stack past that frame. */ 82 83 struct frame_id 84 { 85 /* The frame's stack address. This shall be constant through out 86 the lifetime of a frame. Note that this requirement applies to 87 not just the function body, but also the prologue and (in theory 88 at least) the epilogue. Since that value needs to fall either on 89 the boundary, or within the frame's address range, the frame's 90 outer-most address (the inner-most address of the previous frame) 91 is used. Watch out for all the legacy targets that still use the 92 function pointer register or stack pointer register. They are 93 wrong. 94 95 This field is valid only if stack_addr_p is true. Otherwise, this 96 frame represents the null frame. */ 97 CORE_ADDR stack_addr; 98 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(). 104 105 This field is valid only if code_addr_p is true. Otherwise, this 106 frame is considered to have a wildcard code address, i.e. one that 107 matches every address value in frame comparisons. */ 108 CORE_ADDR code_addr; 109 110 /* The frame's special address. This shall be constant through out the 111 lifetime of the frame. This is used for architectures that may have 112 frames that do not change the stack but are still distinct and have 113 some form of distinct identifier (e.g. the ia64 which uses a 2nd 114 stack for registers). This field is treated as unordered - i.e. will 115 not be used in frame ordering comparisons such as frame_id_inner(). 116 117 This field is valid only if special_addr_p is true. Otherwise, this 118 frame is considered to have a wildcard special address, i.e. one that 119 matches every address value in frame comparisons. */ 120 CORE_ADDR special_addr; 121 122 /* Flags to indicate the above fields have valid contents. */ 123 unsigned int stack_addr_p : 1; 124 unsigned int code_addr_p : 1; 125 unsigned int special_addr_p : 1; 126 }; 127 128 /* Methods for constructing and comparing Frame IDs. 129 130 NOTE: Given stackless functions A and B, where A calls B (and hence 131 B is inner-to A). The relationships: !eq(A,B); !eq(B,A); 132 !inner(A,B); !inner(B,A); all hold. 133 134 This is because, while B is inner-to A, B is not strictly inner-to A. 135 Being stackless, they have an identical .stack_addr value, and differ 136 only by their unordered .code_addr and/or .special_addr values. 137 138 Because frame_id_inner is only used as a safety net (e.g., 139 detect a corrupt stack) the lack of strictness is not a problem. 140 Code needing to determine an exact relationship between two frames 141 must instead use frame_id_eq and frame_id_unwind. For instance, 142 in the above, to determine that A stepped-into B, the equation 143 "A.id != B.id && A.id == id_unwind (B)" can be used. */ 144 145 /* For convenience. All fields are zero. */ 146 extern const struct frame_id null_frame_id; 147 148 /* Construct a frame ID. The first parameter is the frame's constant 149 stack address (typically the outer-bound), and the second the 150 frame's constant code address (typically the entry point). 151 The special identifier address is set to indicate a wild card. */ 152 extern struct frame_id frame_id_build (CORE_ADDR stack_addr, 153 CORE_ADDR code_addr); 154 155 /* Construct a special frame ID. The first parameter is the frame's constant 156 stack address (typically the outer-bound), the second is the 157 frame's constant code address (typically the entry point), 158 and the third parameter is the frame's special identifier address. */ 159 extern struct frame_id frame_id_build_special (CORE_ADDR stack_addr, 160 CORE_ADDR code_addr, 161 CORE_ADDR special_addr); 162 163 /* Construct a wild card frame ID. The parameter is the frame's constant 164 stack address (typically the outer-bound). The code address as well 165 as the special identifier address are set to indicate wild cards. */ 166 extern struct frame_id frame_id_build_wild (CORE_ADDR stack_addr); 167 168 /* Returns non-zero when L is a valid frame (a valid frame has a 169 non-zero .base). */ 170 extern int frame_id_p (struct frame_id l); 171 172 /* Returns non-zero when L and R identify the same frame, or, if 173 either L or R have a zero .func, then the same frame base. */ 174 extern int frame_id_eq (struct frame_id l, struct frame_id r); 175 176 /* Returns non-zero when L is strictly inner-than R (they have 177 different frame .bases). Neither L, nor R can be `null'. See note 178 above about frameless functions. */ 179 extern int frame_id_inner (struct frame_id l, struct frame_id r); 180 181 /* Write the internal representation of a frame ID on the specified 182 stream. */ 183 extern void fprint_frame_id (struct ui_file *file, struct frame_id id); 184 185 186 /* For every stopped thread, GDB tracks two frames: current and 187 selected. Current frame is the inner most frame of the selected 188 thread. Selected frame is the one being examined by the the GDB 189 CLI (selected using `up', `down', ...). The frames are created 190 on-demand (via get_prev_frame()) and then held in a frame cache. */ 191 /* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the 192 sequence: `thread 1; up; thread 2; thread 1' you lose thread 1's 193 selected frame. At present GDB only tracks the selected frame of 194 the current thread. But be warned, that might change. */ 195 /* FIXME: cagney/2002-11-14: At any time, only one thread's selected 196 and current frame can be active. Switching threads causes gdb to 197 discard all that cached frame information. Ulgh! Instead, current 198 and selected frame should be bound to a thread. */ 199 200 /* On demand, create the inner most frame using information found in 201 the inferior. If the inner most frame can't be created, throw an 202 error. */ 203 extern struct frame_info *get_current_frame (void); 204 205 /* Invalidates the frame cache (this function should have been called 206 invalidate_cached_frames). 207 208 FIXME: cagney/2002-11-28: The only difference between 209 flush_cached_frames() and reinit_frame_cache() is that the latter 210 explicitly sets the selected frame back to the current frame -- there 211 isn't any real difference (except that one delays the selection of 212 a new frame). Code can instead simply rely on get_selected_frame() 213 to reinit the selected frame as needed. As for invalidating the 214 cache, there should be two methods: one that reverts the thread's 215 selected frame back to current frame (for when the inferior 216 resumes) and one that does not (for when the user modifies the 217 target invalidating the frame cache). */ 218 extern void flush_cached_frames (void); 219 extern void reinit_frame_cache (void); 220 221 /* On demand, create the selected frame and then return it. If the 222 selected frame can not be created, this function prints then throws 223 an error. When MESSAGE is non-NULL, use it for the error message, 224 otherwize use a generic error message. */ 225 /* FIXME: cagney/2002-11-28: At present, when there is no selected 226 frame, this function always returns the current (inner most) frame. 227 It should instead, when a thread has previously had its frame 228 selected (but not resumed) and the frame cache invalidated, find 229 and then return that thread's previously selected frame. */ 230 extern struct frame_info *get_selected_frame (const char *message); 231 232 /* Select a specific frame. NULL, apparently implies re-select the 233 inner most frame. */ 234 extern void select_frame (struct frame_info *); 235 236 /* Given a FRAME, return the next (more inner, younger) or previous 237 (more outer, older) frame. */ 238 extern struct frame_info *get_prev_frame (struct frame_info *); 239 extern struct frame_info *get_next_frame (struct frame_info *); 240 241 /* Given a frame's ID, relocate the frame. Returns NULL if the frame 242 is not found. */ 243 extern struct frame_info *frame_find_by_id (struct frame_id id); 244 245 /* Base attributes of a frame: */ 246 247 /* The frame's `resume' address. Where the program will resume in 248 this frame. 249 250 This replaced: frame->pc; */ 251 extern CORE_ADDR get_frame_pc (struct frame_info *); 252 253 /* An address (not necessarily aligned to an instruction boundary) 254 that falls within THIS frame's code block. 255 256 When a function call is the last statement in a block, the return 257 address for the call may land at the start of the next block. 258 Similarly, if a no-return function call is the last statement in 259 the function, the return address may end up pointing beyond the 260 function, and possibly at the start of the next function. 261 262 These methods make an allowance for this. For call frames, this 263 function returns the frame's PC-1 which "should" be an address in 264 the frame's block. */ 265 266 extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame); 267 extern CORE_ADDR frame_unwind_address_in_block (struct frame_info *next_frame); 268 269 /* The frame's inner-most bound. AKA the stack-pointer. Confusingly 270 known as top-of-stack. */ 271 272 extern CORE_ADDR get_frame_sp (struct frame_info *); 273 extern CORE_ADDR frame_sp_unwind (struct frame_info *); 274 275 276 /* Following on from the `resume' address. Return the entry point 277 address of the function containing that resume address, or zero if 278 that function isn't known. */ 279 extern CORE_ADDR frame_func_unwind (struct frame_info *fi); 280 extern CORE_ADDR get_frame_func (struct frame_info *fi); 281 282 /* Closely related to the resume address, various symbol table 283 attributes that are determined by the PC. Note that for a normal 284 frame, the PC refers to the resume address after the return, and 285 not the call instruction. In such a case, the address is adjusted 286 so that it (approximately) identifies the call site (and not the 287 return site). 288 289 NOTE: cagney/2002-11-28: The frame cache could be used to cache the 290 computed value. Working on the assumption that the bottle-neck is 291 in the single step code, and that code causes the frame cache to be 292 constantly flushed, caching things in a frame is probably of little 293 benefit. As they say `show us the numbers'. 294 295 NOTE: cagney/2002-11-28: Plenty more where this one came from: 296 find_frame_block(), find_frame_partial_function(), 297 find_frame_symtab(), find_frame_function(). Each will need to be 298 carefully considered to determine if the real intent was for it to 299 apply to the PC or the adjusted PC. */ 300 extern void find_frame_sal (struct frame_info *frame, 301 struct symtab_and_line *sal); 302 303 /* Return the frame base (what ever that is) (DEPRECATED). 304 305 Old code was trying to use this single method for two conflicting 306 purposes. Such code needs to be updated to use either of: 307 308 get_frame_id: A low level frame unique identifier, that consists of 309 both a stack and a function address, that can be used to uniquely 310 identify a frame. This value is determined by the frame's 311 low-level unwinder, the stack part [typically] being the 312 top-of-stack of the previous frame, and the function part being the 313 function's start address. Since the correct identification of a 314 frameless function requires both the a stack and function address, 315 the old get_frame_base method was not sufficient. 316 317 get_frame_base_address: get_frame_locals_address: 318 get_frame_args_address: A set of high-level debug-info dependant 319 addresses that fall within the frame. These addresses almost 320 certainly will not match the stack address part of a frame ID (as 321 returned by get_frame_base). 322 323 This replaced: frame->frame; */ 324 325 extern CORE_ADDR get_frame_base (struct frame_info *); 326 327 /* Return the per-frame unique identifer. Can be used to relocate a 328 frame after a frame cache flush (and other similar operations). If 329 FI is NULL, return the null_frame_id. 330 331 NOTE: kettenis/20040508: These functions return a structure. On 332 platforms where structures are returned in static storage (vax, 333 m68k), this may trigger compiler bugs in code like: 334 335 if (frame_id_eq (get_frame_id (l), get_frame_id (r))) 336 337 where the return value from the first get_frame_id (l) gets 338 overwritten by the second get_frame_id (r). Please avoid writing 339 code like this. Use code like: 340 341 struct frame_id id = get_frame_id (l); 342 if (frame_id_eq (id, get_frame_id (r))) 343 344 instead, since that avoids the bug. */ 345 extern struct frame_id get_frame_id (struct frame_info *fi); 346 extern struct frame_id frame_unwind_id (struct frame_info *next_frame); 347 348 /* Assuming that a frame is `normal', return its base-address, or 0 if 349 the information isn't available. NOTE: This address is really only 350 meaningful to the frame's high-level debug info. */ 351 extern CORE_ADDR get_frame_base_address (struct frame_info *); 352 353 /* Assuming that a frame is `normal', return the base-address of the 354 local variables, or 0 if the information isn't available. NOTE: 355 This address is really only meaningful to the frame's high-level 356 debug info. Typically, the argument and locals share a single 357 base-address. */ 358 extern CORE_ADDR get_frame_locals_address (struct frame_info *); 359 360 /* Assuming that a frame is `normal', return the base-address of the 361 parameter list, or 0 if that information isn't available. NOTE: 362 This address is really only meaningful to the frame's high-level 363 debug info. Typically, the argument and locals share a single 364 base-address. */ 365 extern CORE_ADDR get_frame_args_address (struct frame_info *); 366 367 /* The frame's level: 0 for innermost, 1 for its caller, ...; or -1 368 for an invalid frame). */ 369 extern int frame_relative_level (struct frame_info *fi); 370 371 /* Return the frame's type. Some are real, some are signal 372 trampolines, and some are completely artificial (dummy). */ 373 374 enum frame_type 375 { 376 /* A true stack frame, created by the target program during normal 377 execution. */ 378 NORMAL_FRAME, 379 /* A fake frame, created by GDB when performing an inferior function 380 call. */ 381 DUMMY_FRAME, 382 /* In a signal handler, various OSs handle this in various ways. 383 The main thing is that the frame may be far from normal. */ 384 SIGTRAMP_FRAME, 385 /* Sentinel or registers frame. This frame obtains register values 386 direct from the inferior's registers. */ 387 SENTINEL_FRAME 388 }; 389 extern enum frame_type get_frame_type (struct frame_info *); 390 391 /* Unwind the stack frame so that the value of REGNUM, in the previous 392 (up, older) frame is returned. If VALUEP is NULL, don't 393 fetch/compute the value. Instead just return the location of the 394 value. */ 395 extern void frame_register_unwind (struct frame_info *frame, int regnum, 396 int *optimizedp, enum lval_type *lvalp, 397 CORE_ADDR *addrp, int *realnump, 398 gdb_byte *valuep); 399 400 /* Fetch a register from this, or unwind a register from the next 401 frame. Note that the get_frame methods are wrappers to 402 frame->next->unwind. They all [potentially] throw an error if the 403 fetch fails. */ 404 405 extern void frame_unwind_register (struct frame_info *frame, 406 int regnum, gdb_byte *buf); 407 extern void get_frame_register (struct frame_info *frame, 408 int regnum, gdb_byte *buf); 409 410 extern LONGEST frame_unwind_register_signed (struct frame_info *frame, 411 int regnum); 412 extern LONGEST get_frame_register_signed (struct frame_info *frame, 413 int regnum); 414 extern ULONGEST frame_unwind_register_unsigned (struct frame_info *frame, 415 int regnum); 416 extern ULONGEST get_frame_register_unsigned (struct frame_info *frame, 417 int regnum); 418 419 420 /* Use frame_unwind_register_signed. */ 421 extern void frame_unwind_unsigned_register (struct frame_info *frame, 422 int regnum, ULONGEST *val); 423 424 /* Get the value of the register that belongs to this FRAME. This 425 function is a wrapper to the call sequence ``frame_register_unwind 426 (get_next_frame (FRAME))''. As per frame_register_unwind(), if 427 VALUEP is NULL, the registers value is not fetched/computed. */ 428 429 extern void frame_register (struct frame_info *frame, int regnum, 430 int *optimizedp, enum lval_type *lvalp, 431 CORE_ADDR *addrp, int *realnump, 432 gdb_byte *valuep); 433 434 /* The reverse. Store a register value relative to the specified 435 frame. Note: this call makes the frame's state undefined. The 436 register and frame caches must be flushed. */ 437 extern void put_frame_register (struct frame_info *frame, int regnum, 438 const gdb_byte *buf); 439 440 /* Map between a frame register number and its name. A frame register 441 space is a superset of the cooked register space --- it also 442 includes builtin registers. If NAMELEN is negative, use the NAME's 443 length when doing the comparison. */ 444 445 extern int frame_map_name_to_regnum (struct frame_info *frame, 446 const char *name, int namelen); 447 extern const char *frame_map_regnum_to_name (struct frame_info *frame, 448 int regnum); 449 450 /* Unwind the PC. Strictly speaking return the resume address of the 451 calling frame. For GDB, `pc' is the resume address and not a 452 specific register. */ 453 454 extern CORE_ADDR frame_pc_unwind (struct frame_info *frame); 455 456 /* Discard the specified frame. Restoring the registers to the state 457 of the caller. */ 458 extern void frame_pop (struct frame_info *frame); 459 460 /* Return memory from the specified frame. A frame knows its thread / 461 LWP and hence can find its way down to a target. The assumption 462 here is that the current and previous frame share a common address 463 space. 464 465 If the memory read fails, these methods throw an error. 466 467 NOTE: cagney/2003-06-03: Should there be unwind versions of these 468 methods? That isn't clear. Can code, for instance, assume that 469 this and the previous frame's memory or architecture are identical? 470 If architecture / memory changes are always separated by special 471 adaptor frames this should be ok. */ 472 473 extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr, 474 gdb_byte *buf, int len); 475 extern LONGEST get_frame_memory_signed (struct frame_info *this_frame, 476 CORE_ADDR memaddr, int len); 477 extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame, 478 CORE_ADDR memaddr, int len); 479 480 /* Same as above, but return non-zero when the entire memory read 481 succeeds, zero otherwize. */ 482 extern int safe_frame_unwind_memory (struct frame_info *this_frame, 483 CORE_ADDR addr, gdb_byte *buf, int len); 484 485 /* Return this frame's architecture. */ 486 487 extern struct gdbarch *get_frame_arch (struct frame_info *this_frame); 488 489 490 /* Values for the source flag to be used in print_frame_info_base(). */ 491 enum print_what 492 { 493 /* Print only the source line, like in stepi. */ 494 SRC_LINE = -1, 495 /* Print only the location, i.e. level, address (sometimes) 496 function, args, file, line, line num. */ 497 LOCATION, 498 /* Print both of the above. */ 499 SRC_AND_LOC, 500 /* Print location only, but always include the address. */ 501 LOC_AND_ADDRESS 502 }; 503 504 /* Allocate additional space for appendices to a struct frame_info. 505 NOTE: Much of GDB's code works on the assumption that the allocated 506 saved_regs[] array is the size specified below. If you try to make 507 that array smaller, GDB will happily walk off its end. */ 508 509 #ifdef SIZEOF_FRAME_SAVED_REGS 510 #error "SIZEOF_FRAME_SAVED_REGS can not be re-defined" 511 #endif 512 #define SIZEOF_FRAME_SAVED_REGS \ 513 (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS)) 514 515 /* Allocate zero initialized memory from the frame cache obstack. 516 Appendices to the frame info (such as the unwind cache) should 517 allocate memory using this method. */ 518 519 extern void *frame_obstack_zalloc (unsigned long size); 520 #define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE))) 521 #define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE))) 522 523 /* Create a regcache, and copy the frame's registers into it. */ 524 struct regcache *frame_save_as_regcache (struct frame_info *this_frame); 525 526 extern struct block *get_frame_block (struct frame_info *, 527 CORE_ADDR *addr_in_block); 528 529 /* Return the `struct block' that belongs to the selected thread's 530 selected frame. If the inferior has no state, return NULL. 531 532 NOTE: cagney/2002-11-29: 533 534 No state? Does the inferior have any execution state (a core file 535 does, an executable does not). At present the code tests 536 `target_has_stack' but I'm left wondering if it should test 537 `target_has_registers' or, even, a merged target_has_state. 538 539 Should it look at the most recently specified SAL? If the target 540 has no state, should this function try to extract a block from the 541 most recently selected SAL? That way `list foo' would give it some 542 sort of reference point. Then again, perhaps that would confuse 543 things. 544 545 Calls to this function can be broken down into two categories: Code 546 that uses the selected block as an additional, but optional, data 547 point; Code that uses the selected block as a prop, when it should 548 have the relevant frame/block/pc explicitly passed in. 549 550 The latter can be eliminated by correctly parameterizing the code, 551 the former though is more interesting. Per the "address" command, 552 it occurs in the CLI code and makes it possible for commands to 553 work, even when the inferior has no state. */ 554 555 extern struct block *get_selected_block (CORE_ADDR *addr_in_block); 556 557 extern struct symbol *get_frame_function (struct frame_info *); 558 559 extern CORE_ADDR get_pc_function_start (CORE_ADDR); 560 561 extern struct frame_info *find_relative_frame (struct frame_info *, int *); 562 563 extern void show_and_print_stack_frame (struct frame_info *fi, int print_level, 564 enum print_what print_what); 565 566 extern void print_stack_frame (struct frame_info *, int print_level, 567 enum print_what print_what); 568 569 extern void show_stack_frame (struct frame_info *); 570 571 extern void print_frame_info (struct frame_info *, int print_level, 572 enum print_what print_what, int args); 573 574 extern struct frame_info *block_innermost_frame (struct block *); 575 576 extern int deprecated_pc_in_call_dummy (CORE_ADDR pc); 577 578 /* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a 579 function called get_frame_register_p(). This slightly weird (and 580 older) variant of get_frame_register() returns zero (indicating the 581 register is unavailable) if either: the register isn't cached; or 582 the register has been optimized out. Problem is, neither check is 583 exactly correct. A register can't be optimized out (it may not 584 have been saved as part of a function call); The fact that a 585 register isn't in the register cache doesn't mean that the register 586 isn't available (it could have been fetched from memory). */ 587 588 extern int frame_register_read (struct frame_info *frame, int regnum, 589 gdb_byte *buf); 590 591 /* From stack.c. */ 592 extern void args_info (char *, int); 593 594 extern void locals_info (char *, int); 595 596 extern void (*deprecated_selected_frame_level_changed_hook) (int); 597 598 extern void return_command (char *, int); 599 600 601 /* NOTE: cagney/2002-11-27: 602 603 You might think that the below global can simply be replaced by a 604 call to either get_selected_frame() or select_frame(). 605 606 Unfortunately, it isn't that easy. 607 608 The relevant code needs to be audited to determine if it is 609 possible (or practical) to instead pass the applicable frame in as a 610 parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on 611 the deprecated_selected_frame global, while its replacement, 612 PRINT_REGISTERS_INFO(), is parameterized with the selected frame. 613 The only real exceptions occur at the edge (in the CLI code) where 614 user commands need to pick up the selected frame before proceeding. 615 616 This is important. GDB is trying to stamp out the hack: 617 618 saved_frame = deprecated_selected_frame; 619 deprecated_selected_frame = ...; 620 hack_using_global_selected_frame (); 621 deprecated_selected_frame = saved_frame; 622 623 Take care! */ 624 625 extern struct frame_info *deprecated_selected_frame; 626 627 /* NOTE: drow/2003-09-06: 628 629 This function is "a step sideways" for uses of deprecated_selected_frame. 630 They should be fixed as above, but meanwhile, we needed a solution for 631 cases where functions are called with a NULL frame meaning either "the 632 program is not running" or "use the selected frame". Lazy building of 633 deprecated_selected_frame confuses the situation, because now 634 deprecated_selected_frame can be NULL even when the inferior is running. 635 636 This function calls get_selected_frame if the inferior should have a 637 frame, or returns NULL otherwise. */ 638 639 extern struct frame_info *deprecated_safe_get_selected_frame (void); 640 641 /* Create a frame using the specified BASE and PC. */ 642 643 extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc); 644 645 /* FIXME: cagney/2002-12-06: Has the PC in the current frame changed? 646 "infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after 647 the initial frame create. This puts things back in sync. 648 649 This replaced: frame->pc = ....; */ 650 extern void deprecated_update_frame_pc_hack (struct frame_info *frame, 651 CORE_ADDR pc); 652 653 /* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be 654 more exact, was that initial guess at the frame's base as returned 655 by the deleted read_fp() wrong? If it was, fix it. This shouldn't 656 be necessary since the code should be getting the frame's base 657 correct from the outset. 658 659 This replaced: frame->frame = ....; */ 660 extern void deprecated_update_frame_base_hack (struct frame_info *frame, 661 CORE_ADDR base); 662 663 #endif /* !defined (FRAME_H) */ 664