1 /* Definitions for symbol file management in GDB.
3 Copyright (C) 1992-2021 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 (OBJFILES_H)
24 #include "gdb_obstack.h" /* For obstack internals. */
25 #include "objfile-flags.h"
27 #include "progspace.h"
34 #include "gdbsupport/next-iterator.h"
35 #include "gdbsupport/safe-iterator.h"
38 #include "gdbsupport/refcounted-object.h"
40 #include "quick-symbol.h"
44 struct partial_symbol
;
46 /* This structure maintains information on a per-objfile basis about the
47 "entry point" of the objfile, and the scope within which the entry point
48 exists. It is possible that gdb will see more than one objfile that is
49 executable, each with its own entry point.
51 For example, for dynamically linked executables in SVR4, the dynamic linker
52 code is contained within the shared C library, which is actually executable
53 and is run by the kernel first when an exec is done of a user executable
54 that is dynamically linked. The dynamic linker within the shared C library
55 then maps in the various program segments in the user executable and jumps
56 to the user executable's recorded entry point, as if the call had been made
57 directly by the kernel.
59 The traditional gdb method of using this info was to use the
60 recorded entry point to set the entry-file's lowpc and highpc from
61 the debugging information, where these values are the starting
62 address (inclusive) and ending address (exclusive) of the
63 instruction space in the executable which correspond to the
64 "startup file", i.e. crt0.o in most cases. This file is assumed to
65 be a startup file and frames with pc's inside it are treated as
66 nonexistent. Setting these variables is necessary so that
67 backtraces do not fly off the bottom of the stack.
69 NOTE: cagney/2003-09-09: It turns out that this "traditional"
70 method doesn't work. Corinna writes: ``It turns out that the call
71 to test for "inside entry file" destroys a meaningful backtrace
72 under some conditions. E.g. the backtrace tests in the asm-source
73 testcase are broken for some targets. In this test the functions
74 are all implemented as part of one file and the testcase is not
75 necessarily linked with a start file (depending on the target).
76 What happens is, that the first frame is printed normally and
77 following frames are treated as being inside the entry file then.
78 This way, only the #0 frame is printed in the backtrace output.''
79 Ref "frame.c" "NOTE: vinschen/2003-04-01".
81 Gdb also supports an alternate method to avoid running off the bottom
84 There are two frames that are "special", the frame for the function
85 containing the process entry point, since it has no predecessor frame,
86 and the frame for the function containing the user code entry point
87 (the main() function), since all the predecessor frames are for the
88 process startup code. Since we have no guarantee that the linked
89 in startup modules have any debugging information that gdb can use,
90 we need to avoid following frame pointers back into frames that might
91 have been built in the startup code, as we might get hopelessly
92 confused. However, we almost always have debugging information
95 These variables are used to save the range of PC values which are
96 valid within the main() function and within the function containing
97 the process entry point. If we always consider the frame for
98 main() as the outermost frame when debugging user code, and the
99 frame for the process entry point function as the outermost frame
100 when debugging startup code, then all we have to do is have
101 DEPRECATED_FRAME_CHAIN_VALID return false whenever a frame's
102 current PC is within the range specified by these variables. In
103 essence, we set "ceilings" in the frame chain beyond which we will
104 not proceed when following the frame chain back up the stack.
106 A nice side effect is that we can still debug startup code without
107 running off the end of the frame chain, assuming that we have usable
108 debugging information in the startup modules, and if we choose to not
109 use the block at main, or can't find it for some reason, everything
110 still works as before. And if we have no startup code debugging
111 information but we do have usable information for main(), backtraces
112 from user code don't go wandering off into the startup code. */
116 /* The unrelocated value we should use for this objfile entry point. */
117 CORE_ADDR entry_point
;
119 /* The index of the section in which the entry point appears. */
120 int the_bfd_section_index
;
122 /* Set to 1 iff ENTRY_POINT contains a valid value. */
123 unsigned entry_point_p
: 1;
125 /* Set to 1 iff this object was initialized. */
126 unsigned initialized
: 1;
129 /* Sections in an objfile. The section offsets are stored in the
134 /* BFD section pointer */
135 struct bfd_section
*the_bfd_section
;
137 /* Objfile this section is part of. */
138 struct objfile
*objfile
;
140 /* True if this "overlay section" is mapped into an "overlay region". */
144 /* Relocation offset applied to S. */
145 #define obj_section_offset(s) \
146 (((s)->objfile->section_offsets)[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
148 /* The memory address of section S (vma + offset). */
149 #define obj_section_addr(s) \
150 (bfd_section_vma (s->the_bfd_section) \
151 + obj_section_offset (s))
153 /* The one-passed-the-end memory address of section S
154 (vma + size + offset). */
155 #define obj_section_endaddr(s) \
156 (bfd_section_vma (s->the_bfd_section) \
157 + bfd_section_size ((s)->the_bfd_section) \
158 + obj_section_offset (s))
160 #define ALL_OBJFILE_OSECTIONS(objfile, osect) \
161 for (osect = objfile->sections; osect < objfile->sections_end; osect++) \
162 if (osect->the_bfd_section == NULL) \
168 #define SECT_OFF_DATA(objfile) \
169 ((objfile->sect_index_data == -1) \
170 ? (internal_error (__FILE__, __LINE__, \
171 _("sect_index_data not initialized")), -1) \
172 : objfile->sect_index_data)
174 #define SECT_OFF_RODATA(objfile) \
175 ((objfile->sect_index_rodata == -1) \
176 ? (internal_error (__FILE__, __LINE__, \
177 _("sect_index_rodata not initialized")), -1) \
178 : objfile->sect_index_rodata)
180 #define SECT_OFF_TEXT(objfile) \
181 ((objfile->sect_index_text == -1) \
182 ? (internal_error (__FILE__, __LINE__, \
183 _("sect_index_text not initialized")), -1) \
184 : objfile->sect_index_text)
186 /* Sometimes the .bss section is missing from the objfile, so we don't
187 want to die here. Let the users of SECT_OFF_BSS deal with an
188 uninitialized section index. */
189 #define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
191 /* The "objstats" structure provides a place for gdb to record some
192 interesting information about its internal state at runtime, on a
193 per objfile basis, such as information about the number of symbols
194 read, size of string table (if any), etc. */
198 /* Number of full symbols read. */
201 /* Number of ".stabs" read (if applicable). */
204 /* Number of types. */
207 /* Size of stringtable, (if applicable). */
211 #define OBJSTAT(objfile, expr) (objfile -> stats.expr)
212 #define OBJSTATS struct objstats stats
213 extern void print_objfile_statistics (void);
214 extern void print_symbol_bcache_statistics (void);
216 /* Number of entries in the minimal symbol hash table. */
217 #define MINIMAL_SYMBOL_HASH_SIZE 2039
219 /* An iterator for minimal symbols. */
221 struct minimal_symbol_iterator
223 typedef minimal_symbol_iterator self_type
;
224 typedef struct minimal_symbol
*value_type
;
225 typedef struct minimal_symbol
*&reference
;
226 typedef struct minimal_symbol
**pointer
;
227 typedef std::forward_iterator_tag iterator_category
;
228 typedef int difference_type
;
230 explicit minimal_symbol_iterator (struct minimal_symbol
*msym
)
235 value_type
operator* () const
240 bool operator== (const self_type
&other
) const
242 return m_msym
== other
.m_msym
;
245 bool operator!= (const self_type
&other
) const
247 return m_msym
!= other
.m_msym
;
250 self_type
&operator++ ()
257 struct minimal_symbol
*m_msym
;
260 /* Some objfile data is hung off the BFD. This enables sharing of the
261 data across all objfiles using the BFD. The data is stored in an
262 instance of this structure, and associated with the BFD using the
265 struct objfile_per_bfd_storage
267 objfile_per_bfd_storage ()
268 : minsyms_read (false)
271 ~objfile_per_bfd_storage ();
273 /* The storage has an obstack of its own. */
275 auto_obstack storage_obstack
;
279 gdb::bcache string_cache
;
281 /* The gdbarch associated with the BFD. Note that this gdbarch is
282 determined solely from BFD information, without looking at target
283 information. The gdbarch determined from a running target may
284 differ from this e.g. with respect to register types and names. */
286 struct gdbarch
*gdbarch
= NULL
;
288 /* Hash table for mapping symbol names to demangled names. Each
289 entry in the hash table is a demangled_name_entry struct, storing the
290 language and two consecutive strings, both null-terminated; the first one
291 is a mangled or linkage name, and the second is the demangled name or just
292 a zero byte if the name doesn't demangle. */
294 htab_up demangled_names_hash
;
296 /* The per-objfile information about the entry point, the scope (file/func)
297 containing the entry point, and the scope of the user's main() func. */
301 /* The name and language of any "main" found in this objfile. The
302 name can be NULL, which means that the information was not
305 const char *name_of_main
= NULL
;
306 enum language language_of_main
= language_unknown
;
308 /* Each file contains a pointer to an array of minimal symbols for all
309 global symbols that are defined within the file. The array is
310 terminated by a "null symbol", one that has a NULL pointer for the
311 name and a zero value for the address. This makes it easy to walk
312 through the array when passed a pointer to somewhere in the middle
313 of it. There is also a count of the number of symbols, which does
314 not include the terminating null symbol. */
316 gdb::unique_xmalloc_ptr
<minimal_symbol
> msymbols
;
317 int minimal_symbol_count
= 0;
319 /* The number of minimal symbols read, before any minimal symbol
320 de-duplication is applied. Note in particular that this has only
321 a passing relationship with the actual size of the table above;
322 use minimal_symbol_count if you need the true size. */
326 /* This is true if minimal symbols have already been read. Symbol
327 readers can use this to bypass minimal symbol reading. Also, the
328 minimal symbol table management code in minsyms.c uses this to
329 suppress new minimal symbols. You might think that MSYMBOLS or
330 MINIMAL_SYMBOL_COUNT could be used for this, but it is possible
331 for multiple readers to install minimal symbols into a given
334 bool minsyms_read
: 1;
336 /* This is a hash table used to index the minimal symbols by (mangled)
339 minimal_symbol
*msymbol_hash
[MINIMAL_SYMBOL_HASH_SIZE
] {};
341 /* This hash table is used to index the minimal symbols by their
342 demangled names. Uses a language-specific hash function via
345 minimal_symbol
*msymbol_demangled_hash
[MINIMAL_SYMBOL_HASH_SIZE
] {};
347 /* All the different languages of symbols found in the demangled
349 std::bitset
<nr_languages
> demangled_hash_languages
;
352 /* An iterator that first returns a parent objfile, and then each
353 separate debug objfile. */
355 class separate_debug_iterator
359 explicit separate_debug_iterator (struct objfile
*objfile
)
360 : m_objfile (objfile
),
365 bool operator!= (const separate_debug_iterator
&other
)
367 return m_objfile
!= other
.m_objfile
;
370 separate_debug_iterator
&operator++ ();
372 struct objfile
*operator* ()
379 struct objfile
*m_objfile
;
380 struct objfile
*m_parent
;
383 /* A range adapter wrapping separate_debug_iterator. */
385 class separate_debug_range
389 explicit separate_debug_range (struct objfile
*objfile
)
390 : m_objfile (objfile
)
394 separate_debug_iterator
begin ()
396 return separate_debug_iterator (m_objfile
);
399 separate_debug_iterator
end ()
401 return separate_debug_iterator (nullptr);
406 struct objfile
*m_objfile
;
409 /* Master structure for keeping track of each file from which
410 gdb reads symbols. There are several ways these get allocated: 1.
411 The main symbol file, symfile_objfile, set by the symbol-file command,
412 2. Additional symbol files added by the add-symbol-file command,
413 3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files
414 for modules that were loaded when GDB attached to a remote system
417 GDB typically reads symbols twice -- first an initial scan which just
418 reads "partial symbols"; these are partial information for the
419 static/global symbols in a symbol file. When later looking up
420 symbols, lookup_symbol is used to check if we only have a partial
421 symbol and if so, read and expand the full compunit. */
427 /* The only way to create an objfile is to call objfile::make. */
428 objfile (bfd
*, const char *, objfile_flags
);
432 /* Normally you should not call delete. Instead, call 'unlink' to
433 remove it from the program space's list. In some cases, you may
434 need to hold a reference to an objfile that is independent of its
435 existence on the program space's list; for this case, the
436 destructor must be public so that shared_ptr can reference
440 /* Create an objfile. */
441 static objfile
*make (bfd
*bfd_
, const char *name_
, objfile_flags flags_
,
442 objfile
*parent
= nullptr);
444 /* Remove an objfile from the current program space, and free
448 DISABLE_COPY_AND_ASSIGN (objfile
);
450 /* A range adapter that makes it possible to iterate over all
451 psymtabs in one objfile. */
453 psymtab_storage::partial_symtab_range
psymtabs ()
455 return partial_symtabs
->range ();
458 /* Reset the storage for the partial symbol tables. */
460 void reset_psymtabs ()
462 partial_symtabs
.reset (new psymtab_storage ());
465 typedef next_adapter
<struct compunit_symtab
> compunits_range
;
467 /* A range adapter that makes it possible to iterate over all
468 compunits in one objfile. */
470 compunits_range
compunits ()
472 return compunits_range (compunit_symtabs
);
475 /* A range adapter that makes it possible to iterate over all
476 minimal symbols of an objfile. */
482 explicit msymbols_range (struct objfile
*objfile
)
483 : m_objfile (objfile
)
487 minimal_symbol_iterator
begin () const
489 return minimal_symbol_iterator (m_objfile
->per_bfd
->msymbols
.get ());
492 minimal_symbol_iterator
end () const
494 return minimal_symbol_iterator
495 (m_objfile
->per_bfd
->msymbols
.get ()
496 + m_objfile
->per_bfd
->minimal_symbol_count
);
501 struct objfile
*m_objfile
;
504 /* Return a range adapter for iterating over all minimal
507 msymbols_range
msymbols ()
509 return msymbols_range (this);
512 /* Return a range adapter for iterating over all the separate debug
513 objfiles of this objfile. */
515 separate_debug_range
separate_debug_objfiles ()
517 return separate_debug_range (this);
520 CORE_ADDR
text_section_offset () const
522 return section_offsets
[SECT_OFF_TEXT (this)];
525 CORE_ADDR
data_section_offset () const
527 return section_offsets
[SECT_OFF_DATA (this)];
530 /* Intern STRING and return the unique copy. The copy has the same
531 lifetime as the per-BFD object. */
532 const char *intern (const char *str
)
534 return (const char *) per_bfd
->string_cache
.insert (str
, strlen (str
) + 1);
537 /* Intern STRING and return the unique copy. The copy has the same
538 lifetime as the per-BFD object. */
539 const char *intern (const std::string
&str
)
541 return (const char *) per_bfd
->string_cache
.insert (str
.c_str (),
545 /* Retrieve the gdbarch associated with this objfile. */
546 struct gdbarch
*arch () const
548 return per_bfd
->gdbarch
;
551 /* Return true if OBJFILE has partial symbols. */
553 bool has_partial_symbols ();
555 /* See quick_symbol_functions. */
556 struct symtab
*find_last_source_symtab ();
558 /* See quick_symbol_functions. */
559 void forget_cached_source_info ();
561 /* See quick_symbol_functions. */
562 bool map_symtabs_matching_filename
563 (const char *name
, const char *real_path
,
564 gdb::function_view
<bool (symtab
*)> callback
);
566 /* See quick_symbol_functions. */
567 struct compunit_symtab
*lookup_symbol (block_enum kind
, const char *name
,
570 /* See quick_symbol_functions. */
573 /* See quick_symbol_functions. */
576 /* See quick_symbol_functions. */
577 void expand_symtabs_for_function (const char *func_name
);
579 /* See quick_symbol_functions. */
580 void expand_all_symtabs ();
582 /* See quick_symbol_functions. */
583 void expand_symtabs_with_fullname (const char *fullname
);
585 /* See quick_symbol_functions. */
586 void map_matching_symbols
587 (const lookup_name_info
&name
, domain_enum domain
,
589 gdb::function_view
<symbol_found_callback_ftype
> callback
,
590 symbol_compare_ftype
*ordered_compare
);
592 /* See quick_symbol_functions. */
593 void expand_symtabs_matching
594 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
595 const lookup_name_info
*lookup_name
,
596 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
597 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
598 enum search_domain kind
);
600 /* See quick_symbol_functions. */
601 struct compunit_symtab
*find_pc_sect_compunit_symtab
602 (struct bound_minimal_symbol msymbol
,
604 struct obj_section
*section
,
607 /* See quick_symbol_functions. */
608 void map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
611 /* See quick_symbol_functions. */
612 struct compunit_symtab
*find_compunit_symtab_by_address (CORE_ADDR address
);
614 /* See quick_symbol_functions. */
615 enum language
lookup_global_symbol_language (const char *name
,
617 bool *symbol_found_p
);
620 /* The object file's original name as specified by the user,
621 made absolute, and tilde-expanded. However, it is not canonicalized
622 (i.e., it has not been passed through gdb_realpath).
623 This pointer is never NULL. This does not have to be freed; it is
624 guaranteed to have a lifetime at least as long as the objfile. */
626 const char *original_name
= nullptr;
628 CORE_ADDR addr_low
= 0;
630 /* Some flag bits for this objfile. */
634 /* The program space associated with this objfile. */
636 struct program_space
*pspace
;
638 /* List of compunits.
639 These are used to do symbol lookups and file/line-number lookups. */
641 struct compunit_symtab
*compunit_symtabs
= nullptr;
643 /* The partial symbol tables. */
645 std::shared_ptr
<psymtab_storage
> partial_symtabs
;
647 /* The object file's BFD. Can be null if the objfile contains only
648 minimal symbols, e.g. the run time common symbols for SunOS4. */
652 /* The per-BFD data. Note that this is treated specially if OBFD
655 struct objfile_per_bfd_storage
*per_bfd
= nullptr;
657 /* The modification timestamp of the object file, as of the last time
658 we read its symbols. */
662 /* Obstack to hold objects that should be freed when we load a new symbol
663 table from this object file. */
665 struct obstack objfile_obstack
{};
667 /* Structure which keeps track of functions that manipulate objfile's
668 of the same type as this objfile. I.e. the function to read partial
669 symbols for example. Note that this structure is in statically
670 allocated memory, and is shared by all objfiles that use the
671 object module reader of this type. */
673 const struct sym_fns
*sf
= nullptr;
675 /* The "quick" (aka partial) symbol functions for this symbol
677 quick_symbol_functions_up qf
;
679 /* Per objfile data-pointers required by other GDB modules. */
683 /* Set of relocation offsets to apply to each section.
684 The table is indexed by the_bfd_section->index, thus it is generally
685 as large as the number of sections in the binary.
687 These offsets indicate that all symbols (including partial and
688 minimal symbols) which have been read have been relocated by this
689 much. Symbols which are yet to be read need to be relocated by it. */
691 ::section_offsets section_offsets
;
693 /* Indexes in the section_offsets array. These are initialized by the
694 *_symfile_offsets() family of functions (som_symfile_offsets,
695 xcoff_symfile_offsets, default_symfile_offsets). In theory they
696 should correspond to the section indexes used by bfd for the
697 current objfile. The exception to this for the time being is the
700 These are initialized to -1 so that we can later detect if they
701 are used w/o being properly assigned to. */
703 int sect_index_text
= -1;
704 int sect_index_data
= -1;
705 int sect_index_bss
= -1;
706 int sect_index_rodata
= -1;
708 /* These pointers are used to locate the section table, which
709 among other things, is used to map pc addresses into sections.
710 SECTIONS points to the first entry in the table, and
711 SECTIONS_END points to the first location past the last entry
712 in the table. The table is stored on the objfile_obstack. The
713 sections are indexed by the BFD section index; but the
714 structure data is only valid for certain sections
715 (e.g. non-empty, SEC_ALLOC). */
717 struct obj_section
*sections
= nullptr;
718 struct obj_section
*sections_end
= nullptr;
720 /* GDB allows to have debug symbols in separate object files. This is
721 used by .gnu_debuglink, ELF build id note and Mach-O OSO.
722 Although this is a tree structure, GDB only support one level
723 (ie a separate debug for a separate debug is not supported). Note that
724 separate debug object are in the main chain and therefore will be
725 visited by objfiles & co iterators. Separate debug objfile always
726 has a non-nul separate_debug_objfile_backlink. */
728 /* Link to the first separate debug object, if any. */
730 struct objfile
*separate_debug_objfile
= nullptr;
732 /* If this is a separate debug object, this is used as a link to the
733 actual executable objfile. */
735 struct objfile
*separate_debug_objfile_backlink
= nullptr;
737 /* If this is a separate debug object, this is a link to the next one
738 for the same executable objfile. */
740 struct objfile
*separate_debug_objfile_link
= nullptr;
742 /* Place to stash various statistics about this objfile. */
746 /* A linked list of symbols created when reading template types or
747 function templates. These symbols are not stored in any symbol
748 table, so we have to keep them here to relocate them
751 struct symbol
*template_symbols
= nullptr;
753 /* Associate a static link (struct dynamic_prop *) to all blocks (struct
754 block *) that have one.
756 In the context of nested functions (available in Pascal, Ada and GNU C,
757 for instance), a static link (as in DWARF's DW_AT_static_link attribute)
758 for a function is a way to get the frame corresponding to the enclosing
761 Very few blocks have a static link, so it's more memory efficient to
762 store these here rather than in struct block. Static links must be
763 allocated on the objfile's obstack. */
764 htab_up static_links
;
766 /* JIT-related data for this objfile, if the objfile is a JITer;
767 that is, it produces JITed objfiles. */
768 std::unique_ptr
<jiter_objfile_data
> jiter_data
= nullptr;
770 /* JIT-related data for this objfile, if the objfile is JITed;
771 that is, it was produced by a JITer. */
772 std::unique_ptr
<jited_objfile_data
> jited_data
= nullptr;
774 /* A flag that is set to true if the JIT interface symbols are not
775 found in this objfile, so that we can skip the symbol lookup the
776 next time. If an objfile does not have the symbols, it will
778 bool skip_jit_symbol_lookup
= false;
781 /* A deleter for objfile. */
783 struct objfile_deleter
785 void operator() (objfile
*ptr
) const
791 /* A unique pointer that holds an objfile. */
793 typedef std::unique_ptr
<objfile
, objfile_deleter
> objfile_up
;
795 /* Declarations for functions defined in objfiles.c */
797 extern int entry_point_address_query (CORE_ADDR
*entry_p
);
799 extern CORE_ADDR
entry_point_address (void);
801 extern void build_objfile_section_table (struct objfile
*);
803 extern void free_objfile_separate_debug (struct objfile
*);
805 extern void objfile_relocate (struct objfile
*, const section_offsets
&);
806 extern void objfile_rebase (struct objfile
*, CORE_ADDR
);
808 extern int objfile_has_full_symbols (struct objfile
*objfile
);
810 extern int objfile_has_symbols (struct objfile
*objfile
);
812 extern int have_partial_symbols (void);
814 extern int have_full_symbols (void);
816 extern void objfile_set_sym_fns (struct objfile
*objfile
,
817 const struct sym_fns
*sf
);
819 extern void objfiles_changed (void);
821 /* Return true if ADDR maps into one of the sections of OBJFILE and false
824 extern bool is_addr_in_objfile (CORE_ADDR addr
, const struct objfile
*objfile
);
826 /* Return true if ADDRESS maps into one of the sections of a
827 OBJF_SHARED objfile of PSPACE and false otherwise. */
829 extern bool shared_objfile_contains_address_p (struct program_space
*pspace
,
832 /* This operation deletes all objfile entries that represent solibs that
833 weren't explicitly loaded by the user, via e.g., the add-symbol-file
836 extern void objfile_purge_solibs (void);
838 /* Functions for dealing with the minimal symbol table, really a misc
839 address<->symbol mapping for things we don't have debug symbols for. */
841 extern int have_minimal_symbols (void);
843 extern struct obj_section
*find_pc_section (CORE_ADDR pc
);
845 /* Return non-zero if PC is in a section called NAME. */
846 extern int pc_in_section (CORE_ADDR
, const char *);
848 /* Return non-zero if PC is in a SVR4-style procedure linkage table
852 in_plt_section (CORE_ADDR pc
)
854 return (pc_in_section (pc
, ".plt")
855 || pc_in_section (pc
, ".plt.sec"));
858 /* Keep a registry of per-objfile data-pointers required by other GDB
860 DECLARE_REGISTRY(objfile
);
862 /* In normal use, the section map will be rebuilt by find_pc_section
863 if objfiles have been added, removed or relocated since it was last
864 called. Calling inhibit_section_map_updates will inhibit this
865 behavior until the returned scoped_restore object is destroyed. If
866 you call inhibit_section_map_updates you must ensure that every
867 call to find_pc_section in the inhibited region relates to a
868 section that is already in the section map and has not since been
869 removed or relocated. */
870 extern scoped_restore_tmpl
<int> inhibit_section_map_updates
871 (struct program_space
*pspace
);
873 extern void default_iterate_over_objfiles_in_search_order
874 (struct gdbarch
*gdbarch
,
875 iterate_over_objfiles_in_search_order_cb_ftype
*cb
,
876 void *cb_data
, struct objfile
*current_objfile
);
878 /* Reset the per-BFD storage area on OBJ. */
880 void set_objfile_per_bfd (struct objfile
*obj
);
882 /* Return canonical name for OBJFILE.
883 This is the real file name if the file has been opened.
884 Otherwise it is the original name supplied by the user. */
886 const char *objfile_name (const struct objfile
*objfile
);
888 /* Return the (real) file name of OBJFILE if the file has been opened,
889 otherwise return NULL. */
891 const char *objfile_filename (const struct objfile
*objfile
);
893 /* Return the name to print for OBJFILE in debugging messages. */
895 extern const char *objfile_debug_name (const struct objfile
*objfile
);
897 /* Return the name of the file format of OBJFILE if the file has been opened,
898 otherwise return NULL. */
900 const char *objfile_flavour_name (struct objfile
*objfile
);
902 /* Set the objfile's notion of the "main" name and language. */
904 extern void set_objfile_main_name (struct objfile
*objfile
,
905 const char *name
, enum language lang
);
907 extern void objfile_register_static_link
908 (struct objfile
*objfile
,
909 const struct block
*block
,
910 const struct dynamic_prop
*static_link
);
912 extern const struct dynamic_prop
*objfile_lookup_static_link
913 (struct objfile
*objfile
, const struct block
*block
);
915 #endif /* !defined (OBJFILES_H) */