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 psymbol_map
.clear ();
463 partial_symtabs
.reset (new psymtab_storage ());
466 typedef next_adapter
<struct compunit_symtab
> compunits_range
;
468 /* A range adapter that makes it possible to iterate over all
469 compunits in one objfile. */
471 compunits_range
compunits ()
473 return compunits_range (compunit_symtabs
);
476 /* A range adapter that makes it possible to iterate over all
477 minimal symbols of an objfile. */
483 explicit msymbols_range (struct objfile
*objfile
)
484 : m_objfile (objfile
)
488 minimal_symbol_iterator
begin () const
490 return minimal_symbol_iterator (m_objfile
->per_bfd
->msymbols
.get ());
493 minimal_symbol_iterator
end () const
495 return minimal_symbol_iterator
496 (m_objfile
->per_bfd
->msymbols
.get ()
497 + m_objfile
->per_bfd
->minimal_symbol_count
);
502 struct objfile
*m_objfile
;
505 /* Return a range adapter for iterating over all minimal
508 msymbols_range
msymbols ()
510 return msymbols_range (this);
513 /* Return a range adapter for iterating over all the separate debug
514 objfiles of this objfile. */
516 separate_debug_range
separate_debug_objfiles ()
518 return separate_debug_range (this);
521 CORE_ADDR
text_section_offset () const
523 return section_offsets
[SECT_OFF_TEXT (this)];
526 CORE_ADDR
data_section_offset () const
528 return section_offsets
[SECT_OFF_DATA (this)];
531 /* Intern STRING and return the unique copy. The copy has the same
532 lifetime as the per-BFD object. */
533 const char *intern (const char *str
)
535 return (const char *) per_bfd
->string_cache
.insert (str
, strlen (str
) + 1);
538 /* Intern STRING and return the unique copy. The copy has the same
539 lifetime as the per-BFD object. */
540 const char *intern (const std::string
&str
)
542 return (const char *) per_bfd
->string_cache
.insert (str
.c_str (),
546 /* Retrieve the gdbarch associated with this objfile. */
547 struct gdbarch
*arch () const
549 return per_bfd
->gdbarch
;
552 /* Return true if OBJFILE has partial symbols. */
554 bool has_partial_symbols ();
556 /* See quick_symbol_functions. */
557 struct symtab
*find_last_source_symtab ();
559 /* See quick_symbol_functions. */
560 void forget_cached_source_info ();
562 /* See quick_symbol_functions. */
563 bool map_symtabs_matching_filename
564 (const char *name
, const char *real_path
,
565 gdb::function_view
<bool (symtab
*)> callback
);
567 /* See quick_symbol_functions. */
568 struct compunit_symtab
*lookup_symbol (block_enum kind
, const char *name
,
571 /* See quick_symbol_functions. */
574 /* See quick_symbol_functions. */
577 /* See quick_symbol_functions. */
578 void expand_symtabs_for_function (const char *func_name
);
580 /* See quick_symbol_functions. */
581 void expand_all_symtabs ();
583 /* See quick_symbol_functions. */
584 void expand_symtabs_with_fullname (const char *fullname
);
586 /* See quick_symbol_functions. */
587 void map_matching_symbols
588 (const lookup_name_info
&name
, domain_enum domain
,
590 gdb::function_view
<symbol_found_callback_ftype
> callback
,
591 symbol_compare_ftype
*ordered_compare
);
593 /* See quick_symbol_functions. */
594 void expand_symtabs_matching
595 (gdb::function_view
<expand_symtabs_file_matcher_ftype
> file_matcher
,
596 const lookup_name_info
*lookup_name
,
597 gdb::function_view
<expand_symtabs_symbol_matcher_ftype
> symbol_matcher
,
598 gdb::function_view
<expand_symtabs_exp_notify_ftype
> expansion_notify
,
599 enum search_domain kind
);
601 /* See quick_symbol_functions. */
602 struct compunit_symtab
*find_pc_sect_compunit_symtab
603 (struct bound_minimal_symbol msymbol
,
605 struct obj_section
*section
,
608 /* See quick_symbol_functions. */
609 void map_symbol_filenames (symbol_filename_ftype
*fun
, void *data
,
612 /* See quick_symbol_functions. */
613 struct compunit_symtab
*find_compunit_symtab_by_address (CORE_ADDR address
);
615 /* See quick_symbol_functions. */
616 enum language
lookup_global_symbol_language (const char *name
,
618 bool *symbol_found_p
);
621 /* The object file's original name as specified by the user,
622 made absolute, and tilde-expanded. However, it is not canonicalized
623 (i.e., it has not been passed through gdb_realpath).
624 This pointer is never NULL. This does not have to be freed; it is
625 guaranteed to have a lifetime at least as long as the objfile. */
627 const char *original_name
= nullptr;
629 CORE_ADDR addr_low
= 0;
631 /* Some flag bits for this objfile. */
635 /* The program space associated with this objfile. */
637 struct program_space
*pspace
;
639 /* List of compunits.
640 These are used to do symbol lookups and file/line-number lookups. */
642 struct compunit_symtab
*compunit_symtabs
= nullptr;
644 /* The partial symbol tables. */
646 std::shared_ptr
<psymtab_storage
> partial_symtabs
;
648 /* The object file's BFD. Can be null if the objfile contains only
649 minimal symbols, e.g. the run time common symbols for SunOS4. */
653 /* The per-BFD data. Note that this is treated specially if OBFD
656 struct objfile_per_bfd_storage
*per_bfd
= nullptr;
658 /* The modification timestamp of the object file, as of the last time
659 we read its symbols. */
663 /* Obstack to hold objects that should be freed when we load a new symbol
664 table from this object file. */
666 struct obstack objfile_obstack
{};
668 /* Map symbol addresses to the partial symtab that defines the
669 object at that address. */
671 std::vector
<std::pair
<CORE_ADDR
, partial_symtab
*>> psymbol_map
;
673 /* Structure which keeps track of functions that manipulate objfile's
674 of the same type as this objfile. I.e. the function to read partial
675 symbols for example. Note that this structure is in statically
676 allocated memory, and is shared by all objfiles that use the
677 object module reader of this type. */
679 const struct sym_fns
*sf
= nullptr;
681 /* The "quick" (aka partial) symbol functions for this symbol
683 quick_symbol_functions_up qf
;
685 /* Per objfile data-pointers required by other GDB modules. */
689 /* Set of relocation offsets to apply to each section.
690 The table is indexed by the_bfd_section->index, thus it is generally
691 as large as the number of sections in the binary.
693 These offsets indicate that all symbols (including partial and
694 minimal symbols) which have been read have been relocated by this
695 much. Symbols which are yet to be read need to be relocated by it. */
697 ::section_offsets section_offsets
;
699 /* Indexes in the section_offsets array. These are initialized by the
700 *_symfile_offsets() family of functions (som_symfile_offsets,
701 xcoff_symfile_offsets, default_symfile_offsets). In theory they
702 should correspond to the section indexes used by bfd for the
703 current objfile. The exception to this for the time being is the
706 These are initialized to -1 so that we can later detect if they
707 are used w/o being properly assigned to. */
709 int sect_index_text
= -1;
710 int sect_index_data
= -1;
711 int sect_index_bss
= -1;
712 int sect_index_rodata
= -1;
714 /* These pointers are used to locate the section table, which
715 among other things, is used to map pc addresses into sections.
716 SECTIONS points to the first entry in the table, and
717 SECTIONS_END points to the first location past the last entry
718 in the table. The table is stored on the objfile_obstack. The
719 sections are indexed by the BFD section index; but the
720 structure data is only valid for certain sections
721 (e.g. non-empty, SEC_ALLOC). */
723 struct obj_section
*sections
= nullptr;
724 struct obj_section
*sections_end
= nullptr;
726 /* GDB allows to have debug symbols in separate object files. This is
727 used by .gnu_debuglink, ELF build id note and Mach-O OSO.
728 Although this is a tree structure, GDB only support one level
729 (ie a separate debug for a separate debug is not supported). Note that
730 separate debug object are in the main chain and therefore will be
731 visited by objfiles & co iterators. Separate debug objfile always
732 has a non-nul separate_debug_objfile_backlink. */
734 /* Link to the first separate debug object, if any. */
736 struct objfile
*separate_debug_objfile
= nullptr;
738 /* If this is a separate debug object, this is used as a link to the
739 actual executable objfile. */
741 struct objfile
*separate_debug_objfile_backlink
= nullptr;
743 /* If this is a separate debug object, this is a link to the next one
744 for the same executable objfile. */
746 struct objfile
*separate_debug_objfile_link
= nullptr;
748 /* Place to stash various statistics about this objfile. */
752 /* A linked list of symbols created when reading template types or
753 function templates. These symbols are not stored in any symbol
754 table, so we have to keep them here to relocate them
757 struct symbol
*template_symbols
= nullptr;
759 /* Associate a static link (struct dynamic_prop *) to all blocks (struct
760 block *) that have one.
762 In the context of nested functions (available in Pascal, Ada and GNU C,
763 for instance), a static link (as in DWARF's DW_AT_static_link attribute)
764 for a function is a way to get the frame corresponding to the enclosing
767 Very few blocks have a static link, so it's more memory efficient to
768 store these here rather than in struct block. Static links must be
769 allocated on the objfile's obstack. */
770 htab_up static_links
;
772 /* JIT-related data for this objfile, if the objfile is a JITer;
773 that is, it produces JITed objfiles. */
774 std::unique_ptr
<jiter_objfile_data
> jiter_data
= nullptr;
776 /* JIT-related data for this objfile, if the objfile is JITed;
777 that is, it was produced by a JITer. */
778 std::unique_ptr
<jited_objfile_data
> jited_data
= nullptr;
780 /* A flag that is set to true if the JIT interface symbols are not
781 found in this objfile, so that we can skip the symbol lookup the
782 next time. If an objfile does not have the symbols, it will
784 bool skip_jit_symbol_lookup
= false;
787 /* A deleter for objfile. */
789 struct objfile_deleter
791 void operator() (objfile
*ptr
) const
797 /* A unique pointer that holds an objfile. */
799 typedef std::unique_ptr
<objfile
, objfile_deleter
> objfile_up
;
801 /* Declarations for functions defined in objfiles.c */
803 extern int entry_point_address_query (CORE_ADDR
*entry_p
);
805 extern CORE_ADDR
entry_point_address (void);
807 extern void build_objfile_section_table (struct objfile
*);
809 extern void free_objfile_separate_debug (struct objfile
*);
811 extern void objfile_relocate (struct objfile
*, const section_offsets
&);
812 extern void objfile_rebase (struct objfile
*, CORE_ADDR
);
814 extern int objfile_has_full_symbols (struct objfile
*objfile
);
816 extern int objfile_has_symbols (struct objfile
*objfile
);
818 extern int have_partial_symbols (void);
820 extern int have_full_symbols (void);
822 extern void objfile_set_sym_fns (struct objfile
*objfile
,
823 const struct sym_fns
*sf
);
825 extern void objfiles_changed (void);
827 /* Return true if ADDR maps into one of the sections of OBJFILE and false
830 extern bool is_addr_in_objfile (CORE_ADDR addr
, const struct objfile
*objfile
);
832 /* Return true if ADDRESS maps into one of the sections of a
833 OBJF_SHARED objfile of PSPACE and false otherwise. */
835 extern bool shared_objfile_contains_address_p (struct program_space
*pspace
,
838 /* This operation deletes all objfile entries that represent solibs that
839 weren't explicitly loaded by the user, via e.g., the add-symbol-file
842 extern void objfile_purge_solibs (void);
844 /* Functions for dealing with the minimal symbol table, really a misc
845 address<->symbol mapping for things we don't have debug symbols for. */
847 extern int have_minimal_symbols (void);
849 extern struct obj_section
*find_pc_section (CORE_ADDR pc
);
851 /* Return non-zero if PC is in a section called NAME. */
852 extern int pc_in_section (CORE_ADDR
, const char *);
854 /* Return non-zero if PC is in a SVR4-style procedure linkage table
858 in_plt_section (CORE_ADDR pc
)
860 return (pc_in_section (pc
, ".plt")
861 || pc_in_section (pc
, ".plt.sec"));
864 /* Keep a registry of per-objfile data-pointers required by other GDB
866 DECLARE_REGISTRY(objfile
);
868 /* In normal use, the section map will be rebuilt by find_pc_section
869 if objfiles have been added, removed or relocated since it was last
870 called. Calling inhibit_section_map_updates will inhibit this
871 behavior until the returned scoped_restore object is destroyed. If
872 you call inhibit_section_map_updates you must ensure that every
873 call to find_pc_section in the inhibited region relates to a
874 section that is already in the section map and has not since been
875 removed or relocated. */
876 extern scoped_restore_tmpl
<int> inhibit_section_map_updates
877 (struct program_space
*pspace
);
879 extern void default_iterate_over_objfiles_in_search_order
880 (struct gdbarch
*gdbarch
,
881 iterate_over_objfiles_in_search_order_cb_ftype
*cb
,
882 void *cb_data
, struct objfile
*current_objfile
);
884 /* Reset the per-BFD storage area on OBJ. */
886 void set_objfile_per_bfd (struct objfile
*obj
);
888 /* Return canonical name for OBJFILE.
889 This is the real file name if the file has been opened.
890 Otherwise it is the original name supplied by the user. */
892 const char *objfile_name (const struct objfile
*objfile
);
894 /* Return the (real) file name of OBJFILE if the file has been opened,
895 otherwise return NULL. */
897 const char *objfile_filename (const struct objfile
*objfile
);
899 /* Return the name to print for OBJFILE in debugging messages. */
901 extern const char *objfile_debug_name (const struct objfile
*objfile
);
903 /* Return the name of the file format of OBJFILE if the file has been opened,
904 otherwise return NULL. */
906 const char *objfile_flavour_name (struct objfile
*objfile
);
908 /* Set the objfile's notion of the "main" name and language. */
910 extern void set_objfile_main_name (struct objfile
*objfile
,
911 const char *name
, enum language lang
);
913 extern void objfile_register_static_link
914 (struct objfile
*objfile
,
915 const struct block
*block
,
916 const struct dynamic_prop
*static_link
);
918 extern const struct dynamic_prop
*objfile_lookup_static_link
919 (struct objfile
*objfile
, const struct block
*block
);
921 #endif /* !defined (OBJFILES_H) */