1 /* Definitions for symbol file management in GDB. 2 3 Copyright (C) 1992-2015 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 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. 11 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. 16 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/>. */ 19 20 #if !defined (OBJFILES_H) 21 #define OBJFILES_H 22 23 #include "gdb_obstack.h" /* For obstack internals. */ 24 #include "symfile.h" /* For struct psymbol_allocation_list. */ 25 #include "progspace.h" 26 #include "registry.h" 27 #include "gdb_bfd.h" 28 29 struct bcache; 30 struct htab; 31 struct objfile_data; 32 33 /* This structure maintains information on a per-objfile basis about the 34 "entry point" of the objfile, and the scope within which the entry point 35 exists. It is possible that gdb will see more than one objfile that is 36 executable, each with its own entry point. 37 38 For example, for dynamically linked executables in SVR4, the dynamic linker 39 code is contained within the shared C library, which is actually executable 40 and is run by the kernel first when an exec is done of a user executable 41 that is dynamically linked. The dynamic linker within the shared C library 42 then maps in the various program segments in the user executable and jumps 43 to the user executable's recorded entry point, as if the call had been made 44 directly by the kernel. 45 46 The traditional gdb method of using this info was to use the 47 recorded entry point to set the entry-file's lowpc and highpc from 48 the debugging information, where these values are the starting 49 address (inclusive) and ending address (exclusive) of the 50 instruction space in the executable which correspond to the 51 "startup file", i.e. crt0.o in most cases. This file is assumed to 52 be a startup file and frames with pc's inside it are treated as 53 nonexistent. Setting these variables is necessary so that 54 backtraces do not fly off the bottom of the stack. 55 56 NOTE: cagney/2003-09-09: It turns out that this "traditional" 57 method doesn't work. Corinna writes: ``It turns out that the call 58 to test for "inside entry file" destroys a meaningful backtrace 59 under some conditions. E.g. the backtrace tests in the asm-source 60 testcase are broken for some targets. In this test the functions 61 are all implemented as part of one file and the testcase is not 62 necessarily linked with a start file (depending on the target). 63 What happens is, that the first frame is printed normaly and 64 following frames are treated as being inside the enttry file then. 65 This way, only the #0 frame is printed in the backtrace output.'' 66 Ref "frame.c" "NOTE: vinschen/2003-04-01". 67 68 Gdb also supports an alternate method to avoid running off the bottom 69 of the stack. 70 71 There are two frames that are "special", the frame for the function 72 containing the process entry point, since it has no predecessor frame, 73 and the frame for the function containing the user code entry point 74 (the main() function), since all the predecessor frames are for the 75 process startup code. Since we have no guarantee that the linked 76 in startup modules have any debugging information that gdb can use, 77 we need to avoid following frame pointers back into frames that might 78 have been built in the startup code, as we might get hopelessly 79 confused. However, we almost always have debugging information 80 available for main(). 81 82 These variables are used to save the range of PC values which are 83 valid within the main() function and within the function containing 84 the process entry point. If we always consider the frame for 85 main() as the outermost frame when debugging user code, and the 86 frame for the process entry point function as the outermost frame 87 when debugging startup code, then all we have to do is have 88 DEPRECATED_FRAME_CHAIN_VALID return false whenever a frame's 89 current PC is within the range specified by these variables. In 90 essence, we set "ceilings" in the frame chain beyond which we will 91 not proceed when following the frame chain back up the stack. 92 93 A nice side effect is that we can still debug startup code without 94 running off the end of the frame chain, assuming that we have usable 95 debugging information in the startup modules, and if we choose to not 96 use the block at main, or can't find it for some reason, everything 97 still works as before. And if we have no startup code debugging 98 information but we do have usable information for main(), backtraces 99 from user code don't go wandering off into the startup code. */ 100 101 struct entry_info 102 { 103 /* The unrelocated value we should use for this objfile entry point. */ 104 CORE_ADDR entry_point; 105 106 /* The index of the section in which the entry point appears. */ 107 int the_bfd_section_index; 108 109 /* Set to 1 iff ENTRY_POINT contains a valid value. */ 110 unsigned entry_point_p : 1; 111 112 /* Set to 1 iff this object was initialized. */ 113 unsigned initialized : 1; 114 }; 115 116 /* Sections in an objfile. The section offsets are stored in the 117 OBJFILE. */ 118 119 struct obj_section 120 { 121 struct bfd_section *the_bfd_section; /* BFD section pointer */ 122 123 /* Objfile this section is part of. */ 124 struct objfile *objfile; 125 126 /* True if this "overlay section" is mapped into an "overlay region". */ 127 int ovly_mapped; 128 }; 129 130 /* Relocation offset applied to S. */ 131 #define obj_section_offset(s) \ 132 (((s)->objfile->section_offsets)->offsets[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)]) 133 134 /* The memory address of section S (vma + offset). */ 135 #define obj_section_addr(s) \ 136 (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \ 137 + obj_section_offset (s)) 138 139 /* The one-passed-the-end memory address of section S 140 (vma + size + offset). */ 141 #define obj_section_endaddr(s) \ 142 (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \ 143 + bfd_get_section_size ((s)->the_bfd_section) \ 144 + obj_section_offset (s)) 145 146 /* The "objstats" structure provides a place for gdb to record some 147 interesting information about its internal state at runtime, on a 148 per objfile basis, such as information about the number of symbols 149 read, size of string table (if any), etc. */ 150 151 struct objstats 152 { 153 int n_psyms; /* Number of partial symbols read */ 154 int n_syms; /* Number of full symbols read */ 155 int n_stabs; /* Number of ".stabs" read (if applicable) */ 156 int n_types; /* Number of types */ 157 int sz_strtab; /* Size of stringtable, (if applicable) */ 158 }; 159 160 #define OBJSTAT(objfile, expr) (objfile -> stats.expr) 161 #define OBJSTATS struct objstats stats 162 extern void print_objfile_statistics (void); 163 extern void print_symbol_bcache_statistics (void); 164 165 /* Number of entries in the minimal symbol hash table. */ 166 #define MINIMAL_SYMBOL_HASH_SIZE 2039 167 168 /* Some objfile data is hung off the BFD. This enables sharing of the 169 data across all objfiles using the BFD. The data is stored in an 170 instance of this structure, and associated with the BFD using the 171 registry system. */ 172 173 struct objfile_per_bfd_storage 174 { 175 /* The storage has an obstack of its own. */ 176 177 struct obstack storage_obstack; 178 179 /* Byte cache for file names. */ 180 181 struct bcache *filename_cache; 182 183 /* Byte cache for macros. */ 184 struct bcache *macro_cache; 185 186 /* The gdbarch associated with the BFD. Note that this gdbarch is 187 determined solely from BFD information, without looking at target 188 information. The gdbarch determined from a running target may 189 differ from this e.g. with respect to register types and names. */ 190 191 struct gdbarch *gdbarch; 192 193 /* Hash table for mapping symbol names to demangled names. Each 194 entry in the hash table is actually two consecutive strings, 195 both null-terminated; the first one is a mangled or linkage 196 name, and the second is the demangled name or just a zero byte 197 if the name doesn't demangle. */ 198 struct htab *demangled_names_hash; 199 200 /* The per-objfile information about the entry point, the scope (file/func) 201 containing the entry point, and the scope of the user's main() func. */ 202 203 struct entry_info ei; 204 205 /* The name and language of any "main" found in this objfile. The 206 name can be NULL, which means that the information was not 207 recorded. */ 208 209 const char *name_of_main; 210 enum language language_of_main; 211 212 /* Each file contains a pointer to an array of minimal symbols for all 213 global symbols that are defined within the file. The array is 214 terminated by a "null symbol", one that has a NULL pointer for the 215 name and a zero value for the address. This makes it easy to walk 216 through the array when passed a pointer to somewhere in the middle 217 of it. There is also a count of the number of symbols, which does 218 not include the terminating null symbol. The array itself, as well 219 as all the data that it points to, should be allocated on the 220 objfile_obstack for this file. */ 221 222 struct minimal_symbol *msymbols; 223 int minimal_symbol_count; 224 225 /* The number of minimal symbols read, before any minimal symbol 226 de-duplication is applied. Note in particular that this has only 227 a passing relationship with the actual size of the table above; 228 use minimal_symbol_count if you need the true size. */ 229 int n_minsyms; 230 231 /* This is true if minimal symbols have already been read. Symbol 232 readers can use this to bypass minimal symbol reading. Also, the 233 minimal symbol table management code in minsyms.c uses this to 234 suppress new minimal symbols. You might think that MSYMBOLS or 235 MINIMAL_SYMBOL_COUNT could be used for this, but it is possible 236 for multiple readers to install minimal symbols into a given 237 per-BFD. */ 238 239 unsigned int minsyms_read : 1; 240 241 /* This is a hash table used to index the minimal symbols by name. */ 242 243 struct minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE]; 244 245 /* This hash table is used to index the minimal symbols by their 246 demangled names. */ 247 248 struct minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE]; 249 }; 250 251 /* Master structure for keeping track of each file from which 252 gdb reads symbols. There are several ways these get allocated: 1. 253 The main symbol file, symfile_objfile, set by the symbol-file command, 254 2. Additional symbol files added by the add-symbol-file command, 255 3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files 256 for modules that were loaded when GDB attached to a remote system 257 (see remote-vx.c). */ 258 259 struct objfile 260 { 261 262 /* All struct objfile's are chained together by their next pointers. 263 The program space field "objfiles" (frequently referenced via 264 the macro "object_files") points to the first link in this 265 chain. */ 266 267 struct objfile *next; 268 269 /* The object file's original name as specified by the user, 270 made absolute, and tilde-expanded. However, it is not canonicalized 271 (i.e., it has not been passed through gdb_realpath). 272 This pointer is never NULL. This does not have to be freed; it is 273 guaranteed to have a lifetime at least as long as the objfile. */ 274 275 char *original_name; 276 277 CORE_ADDR addr_low; 278 279 /* Some flag bits for this objfile. 280 The values are defined by OBJF_*. */ 281 282 unsigned short flags; 283 284 /* The program space associated with this objfile. */ 285 286 struct program_space *pspace; 287 288 /* List of compunits. 289 These are used to do symbol lookups and file/line-number lookups. */ 290 291 struct compunit_symtab *compunit_symtabs; 292 293 /* Each objfile points to a linked list of partial symtabs derived from 294 this file, one partial symtab structure for each compilation unit 295 (source file). */ 296 297 struct partial_symtab *psymtabs; 298 299 /* Map addresses to the entries of PSYMTABS. It would be more efficient to 300 have a map per the whole process but ADDRMAP cannot selectively remove 301 its items during FREE_OBJFILE. This mapping is already present even for 302 PARTIAL_SYMTABs which still have no corresponding full SYMTABs read. */ 303 304 struct addrmap *psymtabs_addrmap; 305 306 /* List of freed partial symtabs, available for re-use. */ 307 308 struct partial_symtab *free_psymtabs; 309 310 /* The object file's BFD. Can be null if the objfile contains only 311 minimal symbols, e.g. the run time common symbols for SunOS4. */ 312 313 bfd *obfd; 314 315 /* The per-BFD data. Note that this is treated specially if OBFD 316 is NULL. */ 317 318 struct objfile_per_bfd_storage *per_bfd; 319 320 /* The modification timestamp of the object file, as of the last time 321 we read its symbols. */ 322 323 long mtime; 324 325 /* Obstack to hold objects that should be freed when we load a new symbol 326 table from this object file. */ 327 328 struct obstack objfile_obstack; 329 330 /* A byte cache where we can stash arbitrary "chunks" of bytes that 331 will not change. */ 332 333 struct psymbol_bcache *psymbol_cache; /* Byte cache for partial syms. */ 334 335 /* Vectors of all partial symbols read in from file. The actual data 336 is stored in the objfile_obstack. */ 337 338 struct psymbol_allocation_list global_psymbols; 339 struct psymbol_allocation_list static_psymbols; 340 341 /* Structure which keeps track of functions that manipulate objfile's 342 of the same type as this objfile. I.e. the function to read partial 343 symbols for example. Note that this structure is in statically 344 allocated memory, and is shared by all objfiles that use the 345 object module reader of this type. */ 346 347 const struct sym_fns *sf; 348 349 /* Per objfile data-pointers required by other GDB modules. */ 350 351 REGISTRY_FIELDS; 352 353 /* Set of relocation offsets to apply to each section. 354 The table is indexed by the_bfd_section->index, thus it is generally 355 as large as the number of sections in the binary. 356 The table is stored on the objfile_obstack. 357 358 These offsets indicate that all symbols (including partial and 359 minimal symbols) which have been read have been relocated by this 360 much. Symbols which are yet to be read need to be relocated by it. */ 361 362 struct section_offsets *section_offsets; 363 int num_sections; 364 365 /* Indexes in the section_offsets array. These are initialized by the 366 *_symfile_offsets() family of functions (som_symfile_offsets, 367 xcoff_symfile_offsets, default_symfile_offsets). In theory they 368 should correspond to the section indexes used by bfd for the 369 current objfile. The exception to this for the time being is the 370 SOM version. */ 371 372 int sect_index_text; 373 int sect_index_data; 374 int sect_index_bss; 375 int sect_index_rodata; 376 377 /* These pointers are used to locate the section table, which 378 among other things, is used to map pc addresses into sections. 379 SECTIONS points to the first entry in the table, and 380 SECTIONS_END points to the first location past the last entry 381 in the table. The table is stored on the objfile_obstack. The 382 sections are indexed by the BFD section index; but the 383 structure data is only valid for certain sections 384 (e.g. non-empty, SEC_ALLOC). */ 385 386 struct obj_section *sections, *sections_end; 387 388 /* GDB allows to have debug symbols in separate object files. This is 389 used by .gnu_debuglink, ELF build id note and Mach-O OSO. 390 Although this is a tree structure, GDB only support one level 391 (ie a separate debug for a separate debug is not supported). Note that 392 separate debug object are in the main chain and therefore will be 393 visited by ALL_OBJFILES & co iterators. Separate debug objfile always 394 has a non-nul separate_debug_objfile_backlink. */ 395 396 /* Link to the first separate debug object, if any. */ 397 struct objfile *separate_debug_objfile; 398 399 /* If this is a separate debug object, this is used as a link to the 400 actual executable objfile. */ 401 struct objfile *separate_debug_objfile_backlink; 402 403 /* If this is a separate debug object, this is a link to the next one 404 for the same executable objfile. */ 405 struct objfile *separate_debug_objfile_link; 406 407 /* Place to stash various statistics about this objfile. */ 408 OBJSTATS; 409 410 /* A linked list of symbols created when reading template types or 411 function templates. These symbols are not stored in any symbol 412 table, so we have to keep them here to relocate them 413 properly. */ 414 struct symbol *template_symbols; 415 }; 416 417 /* Defines for the objfile flag word. */ 418 419 /* When an object file has its functions reordered (currently Irix-5.2 420 shared libraries exhibit this behaviour), we will need an expensive 421 algorithm to locate a partial symtab or symtab via an address. 422 To avoid this penalty for normal object files, we use this flag, 423 whose setting is determined upon symbol table read in. */ 424 425 #define OBJF_REORDERED (1 << 0) /* Functions are reordered */ 426 427 /* Distinguish between an objfile for a shared library and a "vanilla" 428 objfile. This may come from a target's implementation of the solib 429 interface, from add-symbol-file, or any other mechanism that loads 430 dynamic objects. */ 431 432 #define OBJF_SHARED (1 << 1) /* From a shared library */ 433 434 /* User requested that this objfile be read in it's entirety. */ 435 436 #define OBJF_READNOW (1 << 2) /* Immediate full read */ 437 438 /* This objfile was created because the user explicitly caused it 439 (e.g., used the add-symbol-file command). This bit offers a way 440 for run_command to remove old objfile entries which are no longer 441 valid (i.e., are associated with an old inferior), but to preserve 442 ones that the user explicitly loaded via the add-symbol-file 443 command. */ 444 445 #define OBJF_USERLOADED (1 << 3) /* User loaded */ 446 447 /* Set if we have tried to read partial symtabs for this objfile. 448 This is used to allow lazy reading of partial symtabs. */ 449 450 #define OBJF_PSYMTABS_READ (1 << 4) 451 452 /* Set if this is the main symbol file 453 (as opposed to symbol file for dynamically loaded code). */ 454 455 #define OBJF_MAINLINE (1 << 5) 456 457 /* ORIGINAL_NAME and OBFD->FILENAME correspond to text description unrelated to 458 filesystem names. It can be for example "<image in memory>". */ 459 460 #define OBJF_NOT_FILENAME (1 << 6) 461 462 /* Declarations for functions defined in objfiles.c */ 463 464 extern struct objfile *allocate_objfile (bfd *, const char *name, int); 465 466 extern struct gdbarch *get_objfile_arch (const struct objfile *); 467 468 extern int entry_point_address_query (CORE_ADDR *entry_p); 469 470 extern CORE_ADDR entry_point_address (void); 471 472 extern void build_objfile_section_table (struct objfile *); 473 474 extern void terminate_minimal_symbol_table (struct objfile *objfile); 475 476 extern struct objfile *objfile_separate_debug_iterate (const struct objfile *, 477 const struct objfile *); 478 479 extern void put_objfile_before (struct objfile *, struct objfile *); 480 481 extern void add_separate_debug_objfile (struct objfile *, struct objfile *); 482 483 extern void unlink_objfile (struct objfile *); 484 485 extern void free_objfile (struct objfile *); 486 487 extern void free_objfile_separate_debug (struct objfile *); 488 489 extern struct cleanup *make_cleanup_free_objfile (struct objfile *); 490 491 extern void free_all_objfiles (void); 492 493 extern void objfile_relocate (struct objfile *, const struct section_offsets *); 494 extern void objfile_rebase (struct objfile *, CORE_ADDR); 495 496 extern int objfile_has_partial_symbols (struct objfile *objfile); 497 498 extern int objfile_has_full_symbols (struct objfile *objfile); 499 500 extern int objfile_has_symbols (struct objfile *objfile); 501 502 extern int have_partial_symbols (void); 503 504 extern int have_full_symbols (void); 505 506 extern void objfile_set_sym_fns (struct objfile *objfile, 507 const struct sym_fns *sf); 508 509 extern void objfiles_changed (void); 510 511 extern int is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile); 512 513 /* Return true if ADDRESS maps into one of the sections of a 514 OBJF_SHARED objfile of PSPACE and false otherwise. */ 515 516 extern int shared_objfile_contains_address_p (struct program_space *pspace, 517 CORE_ADDR address); 518 519 /* This operation deletes all objfile entries that represent solibs that 520 weren't explicitly loaded by the user, via e.g., the add-symbol-file 521 command. */ 522 523 extern void objfile_purge_solibs (void); 524 525 /* Functions for dealing with the minimal symbol table, really a misc 526 address<->symbol mapping for things we don't have debug symbols for. */ 527 528 extern int have_minimal_symbols (void); 529 530 extern struct obj_section *find_pc_section (CORE_ADDR pc); 531 532 /* Return non-zero if PC is in a section called NAME. */ 533 extern int pc_in_section (CORE_ADDR, char *); 534 535 /* Return non-zero if PC is in a SVR4-style procedure linkage table 536 section. */ 537 538 static inline int 539 in_plt_section (CORE_ADDR pc) 540 { 541 return pc_in_section (pc, ".plt"); 542 } 543 544 /* Keep a registry of per-objfile data-pointers required by other GDB 545 modules. */ 546 DECLARE_REGISTRY(objfile); 547 548 /* In normal use, the section map will be rebuilt by find_pc_section 549 if objfiles have been added, removed or relocated since it was last 550 called. Calling inhibit_section_map_updates will inhibit this 551 behavior until resume_section_map_updates is called. If you call 552 inhibit_section_map_updates you must ensure that every call to 553 find_pc_section in the inhibited region relates to a section that 554 is already in the section map and has not since been removed or 555 relocated. */ 556 extern void inhibit_section_map_updates (struct program_space *pspace); 557 558 /* Resume automatically rebuilding the section map as required. */ 559 extern void resume_section_map_updates (struct program_space *pspace); 560 561 /* Version of the above suitable for use as a cleanup. */ 562 extern void resume_section_map_updates_cleanup (void *arg); 563 564 extern void default_iterate_over_objfiles_in_search_order 565 (struct gdbarch *gdbarch, 566 iterate_over_objfiles_in_search_order_cb_ftype *cb, 567 void *cb_data, struct objfile *current_objfile); 568 569 570 /* Traverse all object files in the current program space. 571 ALL_OBJFILES_SAFE works even if you delete the objfile during the 572 traversal. */ 573 574 /* Traverse all object files in program space SS. */ 575 576 #define ALL_PSPACE_OBJFILES(ss, obj) \ 577 for ((obj) = ss->objfiles; (obj) != NULL; (obj) = (obj)->next) 578 579 #define ALL_OBJFILES(obj) \ 580 for ((obj) = current_program_space->objfiles; \ 581 (obj) != NULL; \ 582 (obj) = (obj)->next) 583 584 #define ALL_OBJFILES_SAFE(obj,nxt) \ 585 for ((obj) = current_program_space->objfiles; \ 586 (obj) != NULL? ((nxt)=(obj)->next,1) :0; \ 587 (obj) = (nxt)) 588 589 /* Traverse all symtabs in one objfile. */ 590 591 #define ALL_OBJFILE_FILETABS(objfile, cu, s) \ 592 ALL_OBJFILE_COMPUNITS (objfile, cu) \ 593 ALL_COMPUNIT_FILETABS (cu, s) 594 595 /* Traverse all compunits in one objfile. */ 596 597 #define ALL_OBJFILE_COMPUNITS(objfile, cu) \ 598 for ((cu) = (objfile) -> compunit_symtabs; (cu) != NULL; (cu) = (cu) -> next) 599 600 /* Traverse all minimal symbols in one objfile. */ 601 602 #define ALL_OBJFILE_MSYMBOLS(objfile, m) \ 603 for ((m) = (objfile)->per_bfd->msymbols; \ 604 MSYMBOL_LINKAGE_NAME (m) != NULL; \ 605 (m)++) 606 607 /* Traverse all symtabs in all objfiles in the current symbol 608 space. */ 609 610 #define ALL_FILETABS(objfile, ps, s) \ 611 ALL_OBJFILES (objfile) \ 612 ALL_OBJFILE_FILETABS (objfile, ps, s) 613 614 /* Traverse all compunits in all objfiles in the current program space. */ 615 616 #define ALL_COMPUNITS(objfile, cu) \ 617 ALL_OBJFILES (objfile) \ 618 ALL_OBJFILE_COMPUNITS (objfile, cu) 619 620 /* Traverse all minimal symbols in all objfiles in the current symbol 621 space. */ 622 623 #define ALL_MSYMBOLS(objfile, m) \ 624 ALL_OBJFILES (objfile) \ 625 ALL_OBJFILE_MSYMBOLS (objfile, m) 626 627 #define ALL_OBJFILE_OSECTIONS(objfile, osect) \ 628 for (osect = objfile->sections; osect < objfile->sections_end; osect++) \ 629 if (osect->the_bfd_section == NULL) \ 630 { \ 631 /* Nothing. */ \ 632 } \ 633 else 634 635 /* Traverse all obj_sections in all objfiles in the current program 636 space. 637 638 Note that this detects a "break" in the inner loop, and exits 639 immediately from the outer loop as well, thus, client code doesn't 640 need to know that this is implemented with a double for. The extra 641 hair is to make sure that a "break;" stops the outer loop iterating 642 as well, and both OBJFILE and OSECT are left unmodified: 643 644 - The outer loop learns about the inner loop's end condition, and 645 stops iterating if it detects the inner loop didn't reach its 646 end. In other words, the outer loop keeps going only if the 647 inner loop reached its end cleanly [(osect) == 648 (objfile)->sections_end]. 649 650 - OSECT is initialized in the outer loop initialization 651 expressions, such as if the inner loop has reached its end, so 652 the check mentioned above succeeds the first time. 653 654 - The trick to not clearing OBJFILE on a "break;" is, in the outer 655 loop's loop expression, advance OBJFILE, but iff the inner loop 656 reached its end. If not, there was a "break;", so leave OBJFILE 657 as is; the outer loop's conditional will break immediately as 658 well (as OSECT will be different from OBJFILE->sections_end). */ 659 660 #define ALL_OBJSECTIONS(objfile, osect) \ 661 for ((objfile) = current_program_space->objfiles, \ 662 (objfile) != NULL ? ((osect) = (objfile)->sections_end) : 0; \ 663 (objfile) != NULL \ 664 && (osect) == (objfile)->sections_end; \ 665 ((osect) == (objfile)->sections_end \ 666 ? ((objfile) = (objfile)->next, \ 667 (objfile) != NULL ? (osect) = (objfile)->sections_end : 0) \ 668 : 0)) \ 669 ALL_OBJFILE_OSECTIONS (objfile, osect) 670 671 #define SECT_OFF_DATA(objfile) \ 672 ((objfile->sect_index_data == -1) \ 673 ? (internal_error (__FILE__, __LINE__, \ 674 _("sect_index_data not initialized")), -1) \ 675 : objfile->sect_index_data) 676 677 #define SECT_OFF_RODATA(objfile) \ 678 ((objfile->sect_index_rodata == -1) \ 679 ? (internal_error (__FILE__, __LINE__, \ 680 _("sect_index_rodata not initialized")), -1) \ 681 : objfile->sect_index_rodata) 682 683 #define SECT_OFF_TEXT(objfile) \ 684 ((objfile->sect_index_text == -1) \ 685 ? (internal_error (__FILE__, __LINE__, \ 686 _("sect_index_text not initialized")), -1) \ 687 : objfile->sect_index_text) 688 689 /* Sometimes the .bss section is missing from the objfile, so we don't 690 want to die here. Let the users of SECT_OFF_BSS deal with an 691 uninitialized section index. */ 692 #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss 693 694 /* Answer whether there is more than one object file loaded. */ 695 696 #define MULTI_OBJFILE_P() (object_files && object_files->next) 697 698 /* Reset the per-BFD storage area on OBJ. */ 699 700 void set_objfile_per_bfd (struct objfile *obj); 701 702 const char *objfile_name (const struct objfile *objfile); 703 704 /* Return the name to print for OBJFILE in debugging messages. */ 705 706 extern const char *objfile_debug_name (const struct objfile *objfile); 707 708 /* Set the objfile's notion of the "main" name and language. */ 709 710 extern void set_objfile_main_name (struct objfile *objfile, 711 const char *name, enum language lang); 712 713 #endif /* !defined (OBJFILES_H) */ 714