Bug Summary

File:src/gnu/usr.bin/binutils/gdb/objfiles.c
Warning:line 645, column 5
Value stored to 'abfd' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name objfiles.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -resource-dir /usr/local/lib/clang/13.0.0 -D PIE_DEFAULT=1 -I . -I /usr/src/gnu/usr.bin/binutils/gdb -I /usr/src/gnu/usr.bin/binutils/gdb/config -D LOCALEDIR="/usr/share/locale" -D HAVE_CONFIG_H -I /usr/src/gnu/usr.bin/binutils/gdb/../include/opcode -I ../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../bfd -I /usr/src/gnu/usr.bin/binutils/gdb/../include -I ../intl -I /usr/src/gnu/usr.bin/binutils/gdb/../intl -D MI_OUT=1 -D TUI=1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/gnu/usr.bin/binutils/obj/gdb -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fcommon -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/gnu/usr.bin/binutils/gdb/objfiles.c
1/* GDB routines for manipulating objfiles.
2
3 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5
6 Contributed by Cygnus Support, using pieces from other GDB modules.
7
8 This file is part of GDB.
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
24
25/* This file contains support routines for creating, manipulating, and
26 destroying objfile structures. */
27
28#include "defs.h"
29#include "bfd.h" /* Binary File Description */
30#include "symtab.h"
31#include "symfile.h"
32#include "objfiles.h"
33#include "gdb-stabs.h"
34#include "target.h"
35#include "bcache.h"
36
37#include "gdb_assert.h"
38#include <sys/types.h>
39#include "gdb_stat.h"
40#include <fcntl.h>
41#include "gdb_obstack.h"
42#include "gdb_string.h"
43#include "hashtab.h"
44
45#include "breakpoint.h"
46#include "block.h"
47#include "dictionary.h"
48#include "auxv.h"
49
50#include "elf/common.h"
51
52/* Prototypes for local functions */
53
54static void objfile_alloc_data (struct objfile *objfile);
55static void objfile_free_data (struct objfile *objfile);
56
57/* Externally visible variables that are owned by this module.
58 See declarations in objfile.h for more info. */
59
60struct objfile *object_files; /* Linked list of all objfiles */
61struct objfile *current_objfile; /* For symbol file being read in */
62struct objfile *symfile_objfile; /* Main symbol table loaded from */
63struct objfile *rt_common_objfile; /* For runtime common symbols */
64
65/* Locate all mappable sections of a BFD file.
66 objfile_p_char is a char * to get it through
67 bfd_map_over_sections; we cast it back to its proper type. */
68
69#ifndef TARGET_KEEP_SECTION
70#define TARGET_KEEP_SECTION(ASECT)0 0
71#endif
72
73/* Called via bfd_map_over_sections to build up the section table that
74 the objfile references. The objfile contains pointers to the start
75 of the table (objfile->sections) and to the first location after
76 the end of the table (objfile->sections_end). */
77
78static void
79add_to_objfile_sections (struct bfd *abfd, struct bfd_section *asect,
80 void *objfile_p_char)
81{
82 struct objfile *objfile = (struct objfile *) objfile_p_char;
83 struct obj_section section;
84 flagword aflag;
85
86 aflag = bfd_get_section_flags (abfd, asect)((asect)->flags + 0);
87
88 if (!(aflag & SEC_ALLOC0x001) && !(TARGET_KEEP_SECTION (asect)0))
89 return;
90
91 if (0 == bfd_section_size (abfd, asect)((asect)->_raw_size))
92 return;
93 section.offset = 0;
94 section.objfile = objfile;
95 section.the_bfd_section = asect;
96 section.ovly_mapped = 0;
97 section.addr = bfd_section_vma (abfd, asect)((asect)->vma);
98 section.endaddr = section.addr + bfd_section_size (abfd, asect)((asect)->_raw_size);
99 obstack_grow (&objfile->objfile_obstack, (char *) &section, sizeof (section))__extension__ ({ struct obstack *__o = (&objfile->objfile_obstack
); int __len = (sizeof (section)); if (__o->next_free + __len
> __o->chunk_limit) _obstack_newchunk (__o, __len); memcpy
((__o->next_free), (((char *) &section)), (__len)); __o
->next_free += __len; (void) 0; });
100 objfile->sections_end = (struct obj_section *) (((unsigned long) objfile->sections_end) + 1);
101}
102
103/* Builds a section table for OBJFILE.
104 Returns 0 if OK, 1 on error (in which case bfd_error contains the
105 error).
106
107 Note that while we are building the table, which goes into the
108 psymbol obstack, we hijack the sections_end pointer to instead hold
109 a count of the number of sections. When bfd_map_over_sections
110 returns, this count is used to compute the pointer to the end of
111 the sections table, which then overwrites the count.
112
113 Also note that the OFFSET and OVLY_MAPPED in each table entry
114 are initialized to zero.
115
116 Also note that if anything else writes to the psymbol obstack while
117 we are building the table, we're pretty much hosed. */
118
119int
120build_objfile_section_table (struct objfile *objfile)
121{
122 /* objfile->sections can be already set when reading a mapped symbol
123 file. I believe that we do need to rebuild the section table in
124 this case (we rebuild other things derived from the bfd), but we
125 can't free the old one (it's in the objfile_obstack). So we just
126 waste some memory. */
127
128 objfile->sections_end = 0;
129 bfd_map_over_sections (objfile->obfd, add_to_objfile_sections, (char *) objfile);
130 objfile->sections = (struct obj_section *)
131 obstack_finish (&objfile->objfile_obstack)__extension__ ({ struct obstack *__o1 = (&objfile->objfile_obstack
); void *value; value = (void *) __o1->object_base; if (__o1
->next_free == value) __o1->maybe_empty_object = 1; __o1
->next_free = (((((__o1->next_free) - (char *) 0)+__o1->
alignment_mask) & ~ (__o1->alignment_mask)) + (char *)
0); if (__o1->next_free - (char *)__o1->chunk > __o1
->chunk_limit - (char *)__o1->chunk) __o1->next_free
= __o1->chunk_limit; __o1->object_base = __o1->next_free
; value; });
132 objfile->sections_end = objfile->sections + (unsigned long) objfile->sections_end;
133 return (0);
134}
135
136/* Given a pointer to an initialized bfd (ABFD) and some flag bits
137 allocate a new objfile struct, fill it in as best we can, link it
138 into the list of all known objfiles, and return a pointer to the
139 new objfile struct.
140
141 The FLAGS word contains various bits (OBJF_*) that can be taken as
142 requests for specific operations. Other bits like OBJF_SHARED are
143 simply copied through to the new objfile flags member. */
144
145/* NOTE: carlton/2003-02-04: This function is called with args NULL, 0
146 by jv-lang.c, to create an artificial objfile used to hold
147 information about dynamically-loaded Java classes. Unfortunately,
148 that branch of this function doesn't get tested very frequently, so
149 it's prone to breakage. (E.g. at one time the name was set to NULL
150 in that situation, which broke a loop over all names in the dynamic
151 library loader.) If you change this function, please try to leave
152 things in a consistent state even if abfd is NULL. */
153
154struct objfile *
155allocate_objfile (bfd *abfd, int flags)
156{
157 struct objfile *objfile = NULL((void*)0);
158 struct objfile *last_one = NULL((void*)0);
159
160 /* If we don't support mapped symbol files, didn't ask for the file to be
161 mapped, or failed to open the mapped file for some reason, then revert
162 back to an unmapped objfile. */
163
164 if (objfile == NULL((void*)0))
165 {
166 objfile = (struct objfile *) xmalloc (sizeof (struct objfile));
167 memset (objfile, 0, sizeof (struct objfile));
168 objfile->md = NULL((void*)0);
169 objfile->psymbol_cache = bcache_xmalloc ();
170 objfile->macro_cache = bcache_xmalloc ();
171 /* We could use obstack_specify_allocation here instead, but
172 gdb_obstack.h specifies the alloc/dealloc functions. */
173 obstack_init (&objfile->objfile_obstack)_obstack_begin ((&objfile->objfile_obstack), 0, 0, (void
*(*) (long)) xmalloc, (void (*) (void *)) xfree);
174 terminate_minimal_symbol_table (objfile);
175 }
176
177 objfile_alloc_data (objfile);
178
179 /* Update the per-objfile information that comes from the bfd, ensuring
180 that any data that is reference is saved in the per-objfile data
181 region. */
182
183 objfile->obfd = abfd;
184 if (objfile->name != NULL((void*)0))
185 {
186 xfree (objfile->name);
187 }
188 if (abfd != NULL((void*)0))
189 {
190 objfile->name = xstrdup (bfd_get_filename (abfd)((char *) (abfd)->filename));
191 objfile->mtime = bfd_get_mtime (abfd);
192
193 /* Build section table. */
194
195 if (build_objfile_section_table (objfile))
196 {
197 error ("Can't find the file sections in `%s': %s",
198 objfile->name, bfd_errmsg (bfd_get_error ()));
199 }
200 }
201 else
202 {
203 objfile->name = xstrdup ("<<anonymous objfile>>");
204 }
205
206 /* Initialize the section indexes for this objfile, so that we can
207 later detect if they are used w/o being properly assigned to. */
208
209 objfile->sect_index_text = -1;
210 objfile->sect_index_data = -1;
211 objfile->sect_index_bss = -1;
212 objfile->sect_index_rodata = -1;
213
214 /* We don't yet have a C++-specific namespace symtab. */
215
216 objfile->cp_namespace_symtab = NULL((void*)0);
217
218 /* Add this file onto the tail of the linked list of other such files. */
219
220 objfile->next = NULL((void*)0);
221 if (object_files == NULL((void*)0))
222 object_files = objfile;
223 else
224 {
225 for (last_one = object_files;
226 last_one->next;
227 last_one = last_one->next);
228 last_one->next = objfile;
229 }
230
231 /* Save passed in flag bits. */
232 objfile->flags |= flags;
233
234 return (objfile);
235}
236
237/* Initialize entry point information for this objfile. */
238
239void
240init_entry_point_info (struct objfile *objfile)
241{
242 /* Save startup file's range of PC addresses to help blockframe.c
243 decide where the bottom of the stack is. */
244
245 if (bfd_get_file_flags (objfile->obfd)((objfile->obfd)->flags) & EXEC_P0x02)
246 {
247 /* Executable file -- record its entry point so we'll recognize
248 the startup file because it contains the entry point. */
249 objfile->ei.entry_point = bfd_get_start_address (objfile->obfd)((objfile->obfd)->start_address);
250 }
251 else
252 {
253 /* Examination of non-executable.o files. Short-circuit this stuff. */
254 objfile->ei.entry_point = INVALID_ENTRY_POINT(~0);
255 }
256}
257
258/* Get current entry point address. */
259
260CORE_ADDR
261entry_point_address (void)
262{
263 CORE_ADDR entry_addr = symfile_objfile ? symfile_objfile->ei.entry_point : 0;
264
265 /* Find the address of the entry point of the program from the
266 auxv vector. */
267 target_auxv_search (&current_target, AT_ENTRY9, &entry_addr);
268 return entry_addr;
269}
270
271/* Create the terminating entry of OBJFILE's minimal symbol table.
272 If OBJFILE->msymbols is zero, allocate a single entry from
273 OBJFILE->objfile_obstack; otherwise, just initialize
274 OBJFILE->msymbols[OBJFILE->minimal_symbol_count]. */
275void
276terminate_minimal_symbol_table (struct objfile *objfile)
277{
278 if (! objfile->msymbols)
279 objfile->msymbols = ((struct minimal_symbol *)
280 obstack_alloc (&objfile->objfile_obstack,__extension__ ({ struct obstack *__h = (&objfile->objfile_obstack
); __extension__ ({ struct obstack *__o = (__h); int __len = (
(sizeof (objfile->msymbols[0]))); if (__o->chunk_limit -
__o->next_free < __len) _obstack_newchunk (__o, __len)
; ((__o)->next_free += (__len)); (void) 0; }); __extension__
({ struct obstack *__o1 = (__h); void *value; value = (void *
) __o1->object_base; if (__o1->next_free == value) __o1
->maybe_empty_object = 1; __o1->next_free = (((((__o1->
next_free) - (char *) 0)+__o1->alignment_mask) & ~ (__o1
->alignment_mask)) + (char *) 0); if (__o1->next_free -
(char *)__o1->chunk > __o1->chunk_limit - (char *)__o1
->chunk) __o1->next_free = __o1->chunk_limit; __o1->
object_base = __o1->next_free; value; }); })
281 sizeof (objfile->msymbols[0]))__extension__ ({ struct obstack *__h = (&objfile->objfile_obstack
); __extension__ ({ struct obstack *__o = (__h); int __len = (
(sizeof (objfile->msymbols[0]))); if (__o->chunk_limit -
__o->next_free < __len) _obstack_newchunk (__o, __len)
; ((__o)->next_free += (__len)); (void) 0; }); __extension__
({ struct obstack *__o1 = (__h); void *value; value = (void *
) __o1->object_base; if (__o1->next_free == value) __o1
->maybe_empty_object = 1; __o1->next_free = (((((__o1->
next_free) - (char *) 0)+__o1->alignment_mask) & ~ (__o1
->alignment_mask)) + (char *) 0); if (__o1->next_free -
(char *)__o1->chunk > __o1->chunk_limit - (char *)__o1
->chunk) __o1->next_free = __o1->chunk_limit; __o1->
object_base = __o1->next_free; value; }); }));
282
283 {
284 struct minimal_symbol *m
285 = &objfile->msymbols[objfile->minimal_symbol_count];
286
287 memset (m, 0, sizeof (*m));
288 /* Don't rely on these enumeration values being 0's. */
289 MSYMBOL_TYPE (m)(m)->type = mst_unknown;
290 SYMBOL_INIT_LANGUAGE_SPECIFIC (m, language_unknown)(symbol_init_language_specific (&(m)->ginfo, (language_unknown
)));
291 }
292}
293
294
295/* Put one object file before a specified on in the global list.
296 This can be used to make sure an object file is destroyed before
297 another when using ALL_OBJFILES_SAFE to free all objfiles. */
298void
299put_objfile_before (struct objfile *objfile, struct objfile *before_this)
300{
301 struct objfile **objp;
302
303 unlink_objfile (objfile);
304
305 for (objp = &object_files; *objp != NULL((void*)0); objp = &((*objp)->next))
306 {
307 if (*objp == before_this)
308 {
309 objfile->next = *objp;
310 *objp = objfile;
311 return;
312 }
313 }
314
315 internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", __LINE__315,
316 "put_objfile_before: before objfile not in list");
317}
318
319/* Put OBJFILE at the front of the list. */
320
321void
322objfile_to_front (struct objfile *objfile)
323{
324 struct objfile **objp;
325 for (objp = &object_files; *objp != NULL((void*)0); objp = &((*objp)->next))
326 {
327 if (*objp == objfile)
328 {
329 /* Unhook it from where it is. */
330 *objp = objfile->next;
331 /* Put it in the front. */
332 objfile->next = object_files;
333 object_files = objfile;
334 break;
335 }
336 }
337}
338
339/* Unlink OBJFILE from the list of known objfiles, if it is found in the
340 list.
341
342 It is not a bug, or error, to call this function if OBJFILE is not known
343 to be in the current list. This is done in the case of mapped objfiles,
344 for example, just to ensure that the mapped objfile doesn't appear twice
345 in the list. Since the list is threaded, linking in a mapped objfile
346 twice would create a circular list.
347
348 If OBJFILE turns out to be in the list, we zap it's NEXT pointer after
349 unlinking it, just to ensure that we have completely severed any linkages
350 between the OBJFILE and the list. */
351
352void
353unlink_objfile (struct objfile *objfile)
354{
355 struct objfile **objpp;
356
357 for (objpp = &object_files; *objpp != NULL((void*)0); objpp = &((*objpp)->next))
358 {
359 if (*objpp == objfile)
360 {
361 *objpp = (*objpp)->next;
362 objfile->next = NULL((void*)0);
363 return;
364 }
365 }
366
367 internal_error (__FILE__"/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", __LINE__367,
368 "unlink_objfile: objfile already unlinked");
369}
370
371
372/* Destroy an objfile and all the symtabs and psymtabs under it. Note
373 that as much as possible is allocated on the objfile_obstack
374 so that the memory can be efficiently freed.
375
376 Things which we do NOT free because they are not in malloc'd memory
377 or not in memory specific to the objfile include:
378
379 objfile -> sf
380
381 FIXME: If the objfile is using reusable symbol information (via mmalloc),
382 then we need to take into account the fact that more than one process
383 may be using the symbol information at the same time (when mmalloc is
384 extended to support cooperative locking). When more than one process
385 is using the mapped symbol info, we need to be more careful about when
386 we free objects in the reusable area. */
387
388void
389free_objfile (struct objfile *objfile)
390{
391 if (objfile->separate_debug_objfile)
392 {
393 free_objfile (objfile->separate_debug_objfile);
394 }
395
396 if (objfile->separate_debug_objfile_backlink)
397 {
398 /* We freed the separate debug file, make sure the base objfile
399 doesn't reference it. */
400 objfile->separate_debug_objfile_backlink->separate_debug_objfile = NULL((void*)0);
401 }
402
403 /* First do any symbol file specific actions required when we are
404 finished with a particular symbol file. Note that if the objfile
405 is using reusable symbol information (via mmalloc) then each of
406 these routines is responsible for doing the correct thing, either
407 freeing things which are valid only during this particular gdb
408 execution, or leaving them to be reused during the next one. */
409
410 if (objfile->sf != NULL((void*)0))
411 {
412 (*objfile->sf->sym_finish) (objfile);
413 }
414
415 /* We always close the bfd. */
416
417 if (objfile->obfd != NULL((void*)0))
418 {
419 char *name = bfd_get_filename (objfile->obfd)((char *) (objfile->obfd)->filename);
420 if (!bfd_close (objfile->obfd))
421 warning ("cannot close \"%s\": %s",
422 name, bfd_errmsg (bfd_get_error ()));
423 xfree (name);
424 }
425
426 /* Remove it from the chain of all objfiles. */
427
428 unlink_objfile (objfile);
429
430 /* If we are going to free the runtime common objfile, mark it
431 as unallocated. */
432
433 if (objfile == rt_common_objfile)
434 rt_common_objfile = NULL((void*)0);
435
436 /* Before the symbol table code was redone to make it easier to
437 selectively load and remove information particular to a specific
438 linkage unit, gdb used to do these things whenever the monolithic
439 symbol table was blown away. How much still needs to be done
440 is unknown, but we play it safe for now and keep each action until
441 it is shown to be no longer needed. */
442
443 /* I *think* all our callers call clear_symtab_users. If so, no need
444 to call this here. */
445 clear_pc_function_cache ();
446
447 /* The last thing we do is free the objfile struct itself. */
448
449 objfile_free_data (objfile);
450 if (objfile->name != NULL((void*)0))
451 {
452 xfree (objfile->name);
453 }
454 if (objfile->global_psymbols.list)
455 xfree (objfile->global_psymbols.list);
456 if (objfile->static_psymbols.list)
457 xfree (objfile->static_psymbols.list);
458 /* Free the obstacks for non-reusable objfiles */
459 bcache_xfree (objfile->psymbol_cache);
460 bcache_xfree (objfile->macro_cache);
461 if (objfile->demangled_names_hash)
462 htab_delete (objfile->demangled_names_hash);
463 obstack_free (&objfile->objfile_obstack, 0)__extension__ ({ struct obstack *__o = (&objfile->objfile_obstack
); void *__obj = (0); if (__obj > (void *)__o->chunk &&
__obj < (void *)__o->chunk_limit) __o->next_free = __o
->object_base = __obj; else (obstack_free) (__o, __obj); }
);
464 xfree (objfile);
465 objfile = NULL((void*)0);
466}
467
468static void
469do_free_objfile_cleanup (void *obj)
470{
471 free_objfile (obj);
472}
473
474struct cleanup *
475make_cleanup_free_objfile (struct objfile *obj)
476{
477 return make_cleanup (do_free_objfile_cleanup, obj);
478}
479
480/* Free all the object files at once and clean up their users. */
481
482void
483free_all_objfiles (void)
484{
485 struct objfile *objfile, *temp;
486
487 ALL_OBJFILES_SAFE (objfile, temp)for ((objfile) = object_files; (objfile) != ((void*)0)? ((temp
)=(objfile)->next,1) :0; (objfile) = (temp))
488 {
489 free_objfile (objfile);
490 }
491 clear_symtab_users ();
492}
493
494/* Relocate OBJFILE to NEW_OFFSETS. There should be OBJFILE->NUM_SECTIONS
495 entries in new_offsets. */
496void
497objfile_relocate (struct objfile *objfile, struct section_offsets *new_offsets)
498{
499 struct section_offsets *delta =
500 ((struct section_offsets *)
501 alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections))__builtin_alloca((sizeof (struct section_offsets) + sizeof ((
(struct section_offsets *) 0)->offsets) * ((objfile->num_sections
)-1))));
502
503 {
504 int i;
505 int something_changed = 0;
506 for (i = 0; i < objfile->num_sections; ++i)
507 {
508 delta->offsets[i] =
509 ANOFFSET (new_offsets, i)((i == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 509, "Section index is uninitialized"), -1) : new_offsets->
offsets[i]) - ANOFFSET (objfile->section_offsets, i)((i == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 509, "Section index is uninitialized"), -1) : objfile->section_offsets
->offsets[i]);
510 if (ANOFFSET (delta, i)((i == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 510, "Section index is uninitialized"), -1) : delta->offsets
[i]) != 0)
511 something_changed = 1;
512 }
513 if (!something_changed)
514 return;
515 }
516
517 /* OK, get all the symtabs. */
518 {
519 struct symtab *s;
520
521 ALL_OBJFILE_SYMTABS (objfile, s)for ((s) = (objfile) -> symtabs; (s) != ((void*)0); (s) = (
s) -> next)
522 {
523 struct linetable *l;
524 struct blockvector *bv;
525 int i;
526
527 /* First the line table. */
528 l = LINETABLE (s)(s)->linetable;
529 if (l)
530 {
531 for (i = 0; i < l->nitems; ++i)
532 l->item[i].pc += ANOFFSET (delta, s->block_line_section)((s->block_line_section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 532, "Section index is uninitialized"), -1) : delta->offsets
[s->block_line_section]);
533 }
534
535 /* Don't relocate a shared blockvector more than once. */
536 if (!s->primary)
537 continue;
538
539 bv = BLOCKVECTOR (s)(s)->blockvector;
540 for (i = 0; i < BLOCKVECTOR_NBLOCKS (bv)(bv)->nblocks; ++i)
541 {
542 struct block *b;
543 struct symbol *sym;
544 struct dict_iterator iter;
545
546 b = BLOCKVECTOR_BLOCK (bv, i)(bv)->block[i];
547 BLOCK_START (b)(b)->startaddr += ANOFFSET (delta, s->block_line_section)((s->block_line_section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 547, "Section index is uninitialized"), -1) : delta->offsets
[s->block_line_section]);
548 BLOCK_END (b)(b)->endaddr += ANOFFSET (delta, s->block_line_section)((s->block_line_section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 548, "Section index is uninitialized"), -1) : delta->offsets
[s->block_line_section]);
549
550 ALL_BLOCK_SYMBOLS (b, iter, sym)for ((sym) = dict_iterator_first (((b)->dict), &(iter)
); (sym); (sym) = dict_iterator_next (&(iter)))
551 {
552 fixup_symbol_section (sym, objfile);
553
554 /* The RS6000 code from which this was taken skipped
555 any symbols in STRUCT_DOMAIN or UNDEF_DOMAIN.
556 But I'm leaving out that test, on the theory that
557 they can't possibly pass the tests below. */
558 if ((SYMBOL_CLASS (sym)(sym)->aclass == LOC_LABEL
559 || SYMBOL_CLASS (sym)(sym)->aclass == LOC_STATIC
560 || SYMBOL_CLASS (sym)(sym)->aclass == LOC_INDIRECT)
561 && SYMBOL_SECTION (sym)(sym)->ginfo.section >= 0)
562 {
563 SYMBOL_VALUE_ADDRESS (sym)(sym)->ginfo.value.address +=
564 ANOFFSET (delta, SYMBOL_SECTION (sym))(((sym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 564, "Section index is uninitialized"), -1) : delta->offsets
[(sym)->ginfo.section]);
565 }
566#ifdef MIPS_EFI_SYMBOL_NAME
567 /* Relocate Extra Function Info for ecoff. */
568
569 else if (SYMBOL_CLASS (sym)(sym)->aclass == LOC_CONST
570 && SYMBOL_DOMAIN (sym)(sym)->domain == LABEL_DOMAIN
571 && strcmp (DEPRECATED_SYMBOL_NAME (sym)(sym)->ginfo.name, MIPS_EFI_SYMBOL_NAME) == 0)
572 ecoff_relocate_efi (sym, ANOFFSET (delta,((s->block_line_section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 573, "Section index is uninitialized"), -1) : delta->offsets
[s->block_line_section])
573 s->block_line_section)((s->block_line_section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 573, "Section index is uninitialized"), -1) : delta->offsets
[s->block_line_section]));
574#endif
575 }
576 }
577 }
578 }
579
580 {
581 struct partial_symtab *p;
582
583 ALL_OBJFILE_PSYMTABS (objfile, p)for ((p) = (objfile) -> psymtabs; (p) != ((void*)0); (p) =
(p) -> next)
584 {
585 p->textlow += ANOFFSET (delta, SECT_OFF_TEXT (objfile))((((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 585, "sect_index_text not initialized"), -1) : objfile->
sect_index_text) == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 585, "Section index is uninitialized"), -1) : delta->offsets
[((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 585, "sect_index_text not initialized"), -1) : objfile->
sect_index_text)]);
586 p->texthigh += ANOFFSET (delta, SECT_OFF_TEXT (objfile))((((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 586, "sect_index_text not initialized"), -1) : objfile->
sect_index_text) == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 586, "Section index is uninitialized"), -1) : delta->offsets
[((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 586, "sect_index_text not initialized"), -1) : objfile->
sect_index_text)]);
587 }
588 }
589
590 {
591 struct partial_symbol **psym;
592
593 for (psym = objfile->global_psymbols.list;
594 psym < objfile->global_psymbols.next;
595 psym++)
596 {
597 fixup_psymbol_section (*psym, objfile);
598 if (SYMBOL_SECTION (*psym)(*psym)->ginfo.section >= 0)
599 SYMBOL_VALUE_ADDRESS (*psym)(*psym)->ginfo.value.address += ANOFFSET (delta,(((*psym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 600, "Section index is uninitialized"), -1) : delta->offsets
[(*psym)->ginfo.section])
600 SYMBOL_SECTION (*psym))(((*psym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 600, "Section index is uninitialized"), -1) : delta->offsets
[(*psym)->ginfo.section]);
601 }
602 for (psym = objfile->static_psymbols.list;
603 psym < objfile->static_psymbols.next;
604 psym++)
605 {
606 fixup_psymbol_section (*psym, objfile);
607 if (SYMBOL_SECTION (*psym)(*psym)->ginfo.section >= 0)
608 SYMBOL_VALUE_ADDRESS (*psym)(*psym)->ginfo.value.address += ANOFFSET (delta,(((*psym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 609, "Section index is uninitialized"), -1) : delta->offsets
[(*psym)->ginfo.section])
609 SYMBOL_SECTION (*psym))(((*psym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 609, "Section index is uninitialized"), -1) : delta->offsets
[(*psym)->ginfo.section]);
610 }
611 }
612
613 {
614 struct minimal_symbol *msym;
615 ALL_OBJFILE_MSYMBOLS (objfile, msym)for ((msym) = (objfile) -> msymbols; (msym)->ginfo.name
!= ((void*)0); (msym)++)
616 if (SYMBOL_SECTION (msym)(msym)->ginfo.section >= 0)
617 SYMBOL_VALUE_ADDRESS (msym)(msym)->ginfo.value.address += ANOFFSET (delta, SYMBOL_SECTION (msym))(((msym)->ginfo.section == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 617, "Section index is uninitialized"), -1) : delta->offsets
[(msym)->ginfo.section]);
618 }
619 /* Relocating different sections by different amounts may cause the symbols
620 to be out of order. */
621 msymbols_sort (objfile);
622
623 {
624 int i;
625 for (i = 0; i < objfile->num_sections; ++i)
626 (objfile->section_offsets)->offsets[i] = ANOFFSET (new_offsets, i)((i == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 626, "Section index is uninitialized"), -1) : new_offsets->
offsets[i]);
627 }
628
629 if (objfile->ei.entry_point != ~(CORE_ADDR) 0)
630 {
631 /* Relocate ei.entry_point with its section offset, use SECT_OFF_TEXT
632 only as a fallback. */
633 struct obj_section *s;
634 s = find_pc_section (objfile->ei.entry_point);
635 if (s)
636 objfile->ei.entry_point += ANOFFSET (delta, s->the_bfd_section->index)((s->the_bfd_section->index == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 636, "Section index is uninitialized"), -1) : delta->offsets
[s->the_bfd_section->index]);
637 else
638 objfile->ei.entry_point += ANOFFSET (delta, SECT_OFF_TEXT (objfile))((((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 638, "sect_index_text not initialized"), -1) : objfile->
sect_index_text) == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 638, "Section index is uninitialized"), -1) : delta->offsets
[((objfile->sect_index_text == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 638, "sect_index_text not initialized"), -1) : objfile->
sect_index_text)]);
639 }
640
641 {
642 struct obj_section *s;
643 bfd *abfd;
644
645 abfd = objfile->obfd;
Value stored to 'abfd' is never read
646
647 ALL_OBJFILE_OSECTIONS (objfile, s)for (s = objfile->sections; s < objfile->sections_end
; s++)
648 {
649 int idx = s->the_bfd_section->index;
650
651 s->addr += ANOFFSET (delta, idx)((idx == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 651, "Section index is uninitialized"), -1) : delta->offsets
[idx]);
652 s->endaddr += ANOFFSET (delta, idx)((idx == -1) ? (internal_error ("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c"
, 652, "Section index is uninitialized"), -1) : delta->offsets
[idx]);
653 }
654 }
655
656 /* Relocate breakpoints as necessary, after things are relocated. */
657 breakpoint_re_set ();
658}
659
660/* Many places in gdb want to test just to see if we have any partial
661 symbols available. This function returns zero if none are currently
662 available, nonzero otherwise. */
663
664int
665have_partial_symbols (void)
666{
667 struct objfile *ofp;
668
669 ALL_OBJFILES (ofp)for ((ofp) = object_files; (ofp) != ((void*)0); (ofp) = (ofp)
->next)
670 {
671 if (ofp->psymtabs != NULL((void*)0))
672 {
673 return 1;
674 }
675 }
676 return 0;
677}
678
679/* Many places in gdb want to test just to see if we have any full
680 symbols available. This function returns zero if none are currently
681 available, nonzero otherwise. */
682
683int
684have_full_symbols (void)
685{
686 struct objfile *ofp;
687
688 ALL_OBJFILES (ofp)for ((ofp) = object_files; (ofp) != ((void*)0); (ofp) = (ofp)
->next)
689 {
690 if (ofp->symtabs != NULL((void*)0))
691 {
692 return 1;
693 }
694 }
695 return 0;
696}
697
698
699/* This operations deletes all objfile entries that represent solibs that
700 weren't explicitly loaded by the user, via e.g., the add-symbol-file
701 command.
702 */
703void
704objfile_purge_solibs (void)
705{
706 struct objfile *objf;
707 struct objfile *temp;
708
709 ALL_OBJFILES_SAFE (objf, temp)for ((objf) = object_files; (objf) != ((void*)0)? ((temp)=(objf
)->next,1) :0; (objf) = (temp))
710 {
711 /* We assume that the solib package has been purged already, or will
712 be soon.
713 */
714 if (!(objf->flags & OBJF_USERLOADED(1 << 5)) && (objf->flags & OBJF_SHARED(1 << 3)))
715 free_objfile (objf);
716 }
717}
718
719
720/* Many places in gdb want to test just to see if we have any minimal
721 symbols available. This function returns zero if none are currently
722 available, nonzero otherwise. */
723
724int
725have_minimal_symbols (void)
726{
727 struct objfile *ofp;
728
729 ALL_OBJFILES (ofp)for ((ofp) = object_files; (ofp) != ((void*)0); (ofp) = (ofp)
->next)
730 {
731 if (ofp->minimal_symbol_count > 0)
732 {
733 return 1;
734 }
735 }
736 return 0;
737}
738
739/* Returns a section whose range includes PC and SECTION, or NULL if
740 none found. Note the distinction between the return type, struct
741 obj_section (which is defined in gdb), and the input type "struct
742 bfd_section" (which is a bfd-defined data type). The obj_section
743 contains a pointer to the "struct bfd_section". */
744
745struct obj_section *
746find_pc_sect_section (CORE_ADDR pc, struct bfd_section *section)
747{
748 struct obj_section *s;
749 struct objfile *objfile;
750
751 ALL_OBJSECTIONS (objfile, s)for ((objfile) = object_files; (objfile) != ((void*)0); (objfile
) = (objfile)->next) for (s = objfile->sections; s <
objfile->sections_end; s++)
752 if ((section == 0 || section == s->the_bfd_section) &&
753 s->addr <= pc && pc < s->endaddr)
754 return (s);
755
756 return (NULL((void*)0));
757}
758
759/* Returns a section whose range includes PC or NULL if none found.
760 Backward compatibility, no section. */
761
762struct obj_section *
763find_pc_section (CORE_ADDR pc)
764{
765 return find_pc_sect_section (pc, find_pc_mapped_section (pc));
766}
767
768
769/* In SVR4, we recognize a trampoline by it's section name.
770 That is, if the pc is in a section named ".plt" then we are in
771 a trampoline. */
772
773int
774in_plt_section (CORE_ADDR pc, char *name)
775{
776 struct obj_section *s;
777 int retval = 0;
778
779 s = find_pc_section (pc);
780
781 retval = (s != NULL((void*)0)
782 && s->the_bfd_section->name != NULL((void*)0)
783 && strcmp (s->the_bfd_section->name, ".plt") == 0);
784 return (retval);
785}
786
787/* Return nonzero if NAME is in the import list of OBJFILE. Else
788 return zero. */
789
790int
791is_in_import_list (char *name, struct objfile *objfile)
792{
793 int i;
794
795 if (!objfile || !name || !*name)
796 return 0;
797
798 for (i = 0; i < objfile->import_list_size; i++)
799 if (objfile->import_list[i] && DEPRECATED_STREQ (name, objfile->import_list[i])(strcmp ((name), (objfile->import_list[i])) == 0))
800 return 1;
801 return 0;
802}
803
804
805/* Keep a registry of per-objfile data-pointers required by other GDB
806 modules. */
807
808struct objfile_data
809{
810 unsigned index;
811};
812
813struct objfile_data_registration
814{
815 struct objfile_data *data;
816 struct objfile_data_registration *next;
817};
818
819struct objfile_data_registry
820{
821 struct objfile_data_registration *registrations;
822 unsigned num_registrations;
823};
824
825static struct objfile_data_registry objfile_data_registry = { NULL((void*)0), 0 };
826
827const struct objfile_data *
828register_objfile_data (void)
829{
830 struct objfile_data_registration **curr;
831
832 /* Append new registration. */
833 for (curr = &objfile_data_registry.registrations;
834 *curr != NULL((void*)0); curr = &(*curr)->next);
835
836 *curr = XMALLOC (struct objfile_data_registration)((struct objfile_data_registration*) xmalloc (sizeof (struct objfile_data_registration
)));
837 (*curr)->next = NULL((void*)0);
838 (*curr)->data = XMALLOC (struct objfile_data)((struct objfile_data*) xmalloc (sizeof (struct objfile_data)
));
839 (*curr)->data->index = objfile_data_registry.num_registrations++;
840
841 return (*curr)->data;
842}
843
844static void
845objfile_alloc_data (struct objfile *objfile)
846{
847 gdb_assert (objfile->data == NULL)((void) ((objfile->data == ((void*)0)) ? 0 : (internal_error
("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", 847, "%s: Assertion `%s' failed."
, __PRETTY_FUNCTION__, "objfile->data == NULL"), 0)));
848 objfile->num_data = objfile_data_registry.num_registrations;
849 objfile->data = XCALLOC (objfile->num_data, void *)((void **) xcalloc ((objfile->num_data), sizeof (void *)));
850}
851
852static void
853objfile_free_data (struct objfile *objfile)
854{
855 gdb_assert (objfile->data != NULL)((void) ((objfile->data != ((void*)0)) ? 0 : (internal_error
("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", 855, "%s: Assertion `%s' failed."
, __PRETTY_FUNCTION__, "objfile->data != NULL"), 0)));
856 xfree (objfile->data);
857 objfile->data = NULL((void*)0);
858}
859
860void
861clear_objfile_data (struct objfile *objfile)
862{
863 gdb_assert (objfile->data != NULL)((void) ((objfile->data != ((void*)0)) ? 0 : (internal_error
("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", 863, "%s: Assertion `%s' failed."
, __PRETTY_FUNCTION__, "objfile->data != NULL"), 0)));
864 memset (objfile->data, 0, objfile->num_data * sizeof (void *));
865}
866
867void
868set_objfile_data (struct objfile *objfile, const struct objfile_data *data,
869 void *value)
870{
871 gdb_assert (data->index < objfile->num_data)((void) ((data->index < objfile->num_data) ? 0 : (internal_error
("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", 871, "%s: Assertion `%s' failed."
, __PRETTY_FUNCTION__, "data->index < objfile->num_data"
), 0)));
872 objfile->data[data->index] = value;
873}
874
875void *
876objfile_data (struct objfile *objfile, const struct objfile_data *data)
877{
878 gdb_assert (data->index < objfile->num_data)((void) ((data->index < objfile->num_data) ? 0 : (internal_error
("/usr/src/gnu/usr.bin/binutils/gdb/objfiles.c", 878, "%s: Assertion `%s' failed."
, __PRETTY_FUNCTION__, "data->index < objfile->num_data"
), 0)));
879 return objfile->data[data->index];
880}