1 /* Read ELF (Executable and Linking Format) object files for GDB.
3 Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
6 Written by Fred Fish at Cygnus Support.
8 This file is part of GDB.
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.
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.
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., 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
27 #include "gdb_string.h"
29 #include "elf/common.h"
30 #include "elf/internal.h"
36 #include "stabsread.h"
37 #include "gdb-stabs.h"
38 #include "complaints.h"
41 extern void _initialize_elfread (void);
43 /* The struct elfinfo is available only during ELF symbol table and
44 psymtab reading. It is destroyed at the completion of psymtab-reading.
45 It's local to elf_symfile_read. */
49 asection
*stabsect
; /* Section pointer for .stab section */
50 asection
*stabindexsect
; /* Section pointer for .stab.index section */
51 asection
*mdebugsect
; /* Section pointer for .mdebug section */
54 static void free_elfinfo (void *);
56 /* Locate the segments in ABFD. */
58 static struct symfile_segment_data
*
59 elf_symfile_segments (bfd
*abfd
)
61 Elf_Internal_Phdr
*phdrs
, **segments
;
63 int num_phdrs
, num_segments
, num_sections
, i
;
65 struct symfile_segment_data
*data
;
67 phdrs_size
= bfd_get_elf_phdr_upper_bound (abfd
);
71 phdrs
= alloca (phdrs_size
);
72 num_phdrs
= bfd_get_elf_phdrs (abfd
, phdrs
);
77 segments
= alloca (sizeof (Elf_Internal_Phdr
*) * num_phdrs
);
78 for (i
= 0; i
< num_phdrs
; i
++)
79 if (phdrs
[i
].p_type
== PT_LOAD
)
80 segments
[num_segments
++] = &phdrs
[i
];
82 if (num_segments
== 0)
85 data
= XZALLOC (struct symfile_segment_data
);
86 data
->num_segments
= num_segments
;
87 data
->segment_bases
= XCALLOC (num_segments
, CORE_ADDR
);
88 data
->segment_sizes
= XCALLOC (num_segments
, CORE_ADDR
);
90 for (i
= 0; i
< num_segments
; i
++)
92 data
->segment_bases
[i
] = segments
[i
]->p_vaddr
;
93 data
->segment_sizes
[i
] = segments
[i
]->p_memsz
;
96 num_sections
= bfd_count_sections (abfd
);
97 data
->segment_info
= XCALLOC (num_sections
, int);
99 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
104 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
107 vma
= bfd_get_section_vma (abfd
, sect
);
109 for (j
= 0; j
< num_segments
; j
++)
110 if (segments
[j
]->p_memsz
> 0
111 && vma
>= segments
[j
]->p_vaddr
112 && vma
< segments
[j
]->p_vaddr
+ segments
[j
]->p_memsz
)
114 data
->segment_info
[i
] = j
+ 1;
118 if (bfd_get_section_size (sect
) > 0 && j
== num_segments
)
119 warning (_("Loadable segment \"%s\" outside of ELF segments"),
120 bfd_section_name (abfd
, sect
));
126 /* We are called once per section from elf_symfile_read. We
127 need to examine each section we are passed, check to see
128 if it is something we are interested in processing, and
129 if so, stash away some access information for the section.
131 For now we recognize the dwarf debug information sections and
132 line number sections from matching their section names. The
133 ELF definition is no real help here since it has no direct
134 knowledge of DWARF (by design, so any debugging format can be
137 We also recognize the ".stab" sections used by the Sun compilers
138 released with Solaris 2.
140 FIXME: The section names should not be hardwired strings (what
141 should they be? I don't think most object file formats have enough
142 section flags to specify what kind of debug section it is
146 elf_locate_sections (bfd
*ignore_abfd
, asection
*sectp
, void *eip
)
150 ei
= (struct elfinfo
*) eip
;
151 if (strcmp (sectp
->name
, ".stab") == 0)
153 ei
->stabsect
= sectp
;
155 else if (strcmp (sectp
->name
, ".stab.index") == 0)
157 ei
->stabindexsect
= sectp
;
159 else if (strcmp (sectp
->name
, ".mdebug") == 0)
161 ei
->mdebugsect
= sectp
;
165 static struct minimal_symbol
*
166 record_minimal_symbol (char *name
, CORE_ADDR address
,
167 enum minimal_symbol_type ms_type
,
168 asection
*bfd_section
, struct objfile
*objfile
)
170 if (ms_type
== mst_text
|| ms_type
== mst_file_text
)
171 address
= gdbarch_smash_text_address (current_gdbarch
, address
);
173 return prim_record_minimal_symbol_and_info
174 (name
, address
, ms_type
, NULL
, bfd_section
->index
, bfd_section
, objfile
);
181 elf_symtab_read -- read the symbol table of an ELF file
185 void elf_symtab_read (struct objfile *objfile, int dynamic,
186 long number_of_symbols, asymbol **symbol_table)
190 Given an objfile, a symbol table, and a flag indicating whether the
191 symbol table contains dynamic symbols, add all the global function
192 and data symbols to the minimal symbol table.
194 In stabs-in-ELF, as implemented by Sun, there are some local symbols
195 defined in the ELF symbol table, which can be used to locate
196 the beginnings of sections from each ".o" file that was linked to
197 form the executable objfile. We gather any such info and record it
198 in data structures hung off the objfile's private data.
203 elf_symtab_read (struct objfile
*objfile
, int dynamic
,
204 long number_of_symbols
, asymbol
**symbol_table
)
211 enum minimal_symbol_type ms_type
;
212 /* If sectinfo is nonNULL, it contains section info that should end up
213 filed in the objfile. */
214 struct stab_section_info
*sectinfo
= NULL
;
215 /* If filesym is nonzero, it points to a file symbol, but we haven't
216 seen any section info for it yet. */
217 asymbol
*filesym
= 0;
218 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
219 /* Name of filesym, as saved on the objfile_obstack. */
220 char *filesymname
= obsavestring ("", 0, &objfile
->objfile_obstack
);
222 struct dbx_symfile_info
*dbx
= objfile
->deprecated_sym_stab_info
;
223 int stripped
= (bfd_get_symcount (objfile
->obfd
) == 0);
225 for (i
= 0; i
< number_of_symbols
; i
++)
227 sym
= symbol_table
[i
];
228 if (sym
->name
== NULL
|| *sym
->name
== '\0')
230 /* Skip names that don't exist (shouldn't happen), or names
231 that are null strings (may happen). */
235 /* Skip "special" symbols, e.g. ARM mapping symbols. These are
236 symbols which do not correspond to objects in the symbol table,
237 but have some other target-specific meaning. */
238 if (bfd_is_target_special_symbol (objfile
->obfd
, sym
))
241 offset
= ANOFFSET (objfile
->section_offsets
, sym
->section
->index
);
243 && sym
->section
== &bfd_und_section
244 && (sym
->flags
& BSF_FUNCTION
))
246 struct minimal_symbol
*msym
;
248 /* Symbol is a reference to a function defined in
250 If its value is non zero then it is usually the address
251 of the corresponding entry in the procedure linkage table,
252 plus the desired section offset.
253 If its value is zero then the dynamic linker has to resolve
254 the symbol. We are unable to find any meaningful address
255 for this symbol in the executable file, so we skip it. */
256 symaddr
= sym
->value
;
260 msym
= record_minimal_symbol
261 ((char *) sym
->name
, symaddr
,
262 mst_solib_trampoline
, sym
->section
, objfile
);
263 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
265 msym
->filename
= filesymname
;
270 /* If it is a nonstripped executable, do not enter dynamic
271 symbols, as the dynamic symbol table is usually a subset
272 of the main symbol table. */
273 if (dynamic
&& !stripped
)
275 if (sym
->flags
& BSF_FILE
)
277 /* STT_FILE debugging symbol that helps stabs-in-elf debugging.
278 Chain any old one onto the objfile; remember new sym. */
279 if (sectinfo
!= NULL
)
281 sectinfo
->next
= dbx
->stab_section_info
;
282 dbx
->stab_section_info
= sectinfo
;
286 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
288 obsavestring ((char *) filesym
->name
, strlen (filesym
->name
),
289 &objfile
->objfile_obstack
);
292 else if (sym
->flags
& BSF_SECTION_SYM
)
294 else if (sym
->flags
& (BSF_GLOBAL
| BSF_LOCAL
| BSF_WEAK
))
296 struct minimal_symbol
*msym
;
298 /* Select global/local/weak symbols. Note that bfd puts abs
299 symbols in their own section, so all symbols we are
300 interested in will have a section. */
301 /* Bfd symbols are section relative. */
302 symaddr
= sym
->value
+ sym
->section
->vma
;
303 /* Relocate all non-absolute symbols by the section offset. */
304 if (sym
->section
!= &bfd_abs_section
)
308 /* For non-absolute symbols, use the type of the section
309 they are relative to, to intuit text/data. Bfd provides
310 no way of figuring this out for absolute symbols. */
311 if (sym
->section
== &bfd_abs_section
)
313 /* This is a hack to get the minimal symbol type
314 right for Irix 5, which has absolute addresses
315 with special section indices for dynamic symbols. */
316 unsigned short shndx
=
317 ((elf_symbol_type
*) sym
)->internal_elf_sym
.st_shndx
;
327 case SHN_MIPS_ACOMMON
:
334 /* If it is an Irix dynamic symbol, skip section name
335 symbols, relocate all others by section offset. */
336 if (ms_type
!= mst_abs
)
338 if (sym
->name
[0] == '.')
343 else if (sym
->section
->flags
& SEC_CODE
)
345 if (sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
))
349 else if ((sym
->name
[0] == '.' && sym
->name
[1] == 'L')
350 || ((sym
->flags
& BSF_LOCAL
)
351 && sym
->name
[0] == '$'
352 && sym
->name
[1] == 'L'))
353 /* Looks like a compiler-generated label. Skip
354 it. The assembler should be skipping these (to
355 keep executables small), but apparently with
356 gcc on the (deleted) delta m88k SVR4, it loses.
357 So to have us check too should be harmless (but
358 I encourage people to fix this in the assembler
359 instead of adding checks here). */
363 ms_type
= mst_file_text
;
366 else if (sym
->section
->flags
& SEC_ALLOC
)
368 if (sym
->flags
& (BSF_GLOBAL
| BSF_WEAK
))
370 if (sym
->section
->flags
& SEC_LOAD
)
379 else if (sym
->flags
& BSF_LOCAL
)
381 /* Named Local variable in a Data section.
382 Check its name for stabs-in-elf. */
383 int special_local_sect
;
384 if (strcmp ("Bbss.bss", sym
->name
) == 0)
385 special_local_sect
= SECT_OFF_BSS (objfile
);
386 else if (strcmp ("Ddata.data", sym
->name
) == 0)
387 special_local_sect
= SECT_OFF_DATA (objfile
);
388 else if (strcmp ("Drodata.rodata", sym
->name
) == 0)
389 special_local_sect
= SECT_OFF_RODATA (objfile
);
391 special_local_sect
= -1;
392 if (special_local_sect
>= 0)
394 /* Found a special local symbol. Allocate a
395 sectinfo, if needed, and fill it in. */
396 if (sectinfo
== NULL
)
402 = max (SECT_OFF_BSS (objfile
),
403 max (SECT_OFF_DATA (objfile
),
404 SECT_OFF_RODATA (objfile
)));
406 /* max_index is the largest index we'll
407 use into this array, so we must
408 allocate max_index+1 elements for it.
409 However, 'struct stab_section_info'
410 already includes one element, so we
411 need to allocate max_index aadditional
413 size
= (sizeof (struct stab_section_info
)
414 + (sizeof (CORE_ADDR
)
416 sectinfo
= (struct stab_section_info
*)
418 memset (sectinfo
, 0, size
);
419 sectinfo
->num_sections
= max_index
;
422 complaint (&symfile_complaints
,
423 _("elf/stab section information %s without a preceding file symbol"),
429 (char *) filesym
->name
;
432 if (sectinfo
->sections
[special_local_sect
] != 0)
433 complaint (&symfile_complaints
,
434 _("duplicated elf/stab section information for %s"),
436 /* BFD symbols are section relative. */
437 symaddr
= sym
->value
+ sym
->section
->vma
;
438 /* Relocate non-absolute symbols by the
440 if (sym
->section
!= &bfd_abs_section
)
442 sectinfo
->sections
[special_local_sect
] = symaddr
;
443 /* The special local symbols don't go in the
444 minimal symbol table, so ignore this one. */
447 /* Not a special stabs-in-elf symbol, do regular
448 symbol processing. */
449 if (sym
->section
->flags
& SEC_LOAD
)
451 ms_type
= mst_file_data
;
455 ms_type
= mst_file_bss
;
460 ms_type
= mst_unknown
;
465 /* FIXME: Solaris2 shared libraries include lots of
466 odd "absolute" and "undefined" symbols, that play
467 hob with actions like finding what function the PC
468 is in. Ignore them if they aren't text, data, or bss. */
469 /* ms_type = mst_unknown; */
470 continue; /* Skip this symbol. */
472 msym
= record_minimal_symbol
473 ((char *) sym
->name
, symaddr
,
474 ms_type
, sym
->section
, objfile
);
477 /* Pass symbol size field in via BFD. FIXME!!! */
478 unsigned long size
= ((elf_symbol_type
*) sym
)->internal_elf_sym
.st_size
;
479 MSYMBOL_SIZE(msym
) = size
;
481 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
483 msym
->filename
= filesymname
;
485 gdbarch_elf_make_msymbol_special (current_gdbarch
, sym
, msym
);
490 /* Scan and build partial symbols for a symbol file.
491 We have been initialized by a call to elf_symfile_init, which
492 currently does nothing.
494 SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
495 in each section. We simplify it down to a single offset for all
498 MAINLINE is true if we are reading the main symbol
499 table (as opposed to a shared lib or dynamically loaded file).
501 This function only does the minimum work necessary for letting the
502 user "name" things symbolically; it does not read the entire symtab.
503 Instead, it reads the external and static symbols and puts them in partial
504 symbol tables. When more extensive information is requested of a
505 file, the corresponding partial symbol table is mutated into a full
506 fledged symbol table by going back and reading the symbols
509 We look for sections with specific names, to tell us what debug
510 format to look for: FIXME!!!
512 elfstab_build_psymtabs() handles STABS symbols;
513 mdebug_build_psymtabs() handles ECOFF debugging information.
515 Note that ELF files have a "minimal" symbol table, which looks a lot
516 like a COFF symbol table, but has only the minimal information necessary
517 for linking. We process this also, and use the information to
518 build gdb's minimal symbol table. This gives us some minimal debugging
519 capability even for files compiled without -g. */
522 elf_symfile_read (struct objfile
*objfile
, int mainline
)
524 bfd
*abfd
= objfile
->obfd
;
526 struct cleanup
*back_to
;
528 long symcount
= 0, dynsymcount
= 0, synthcount
, storage_needed
;
529 asymbol
**symbol_table
= NULL
, **dyn_symbol_table
= NULL
;
532 init_minimal_symbol_collection ();
533 back_to
= make_cleanup_discard_minimal_symbols ();
535 memset ((char *) &ei
, 0, sizeof (ei
));
537 /* Allocate struct to keep track of the symfile */
538 objfile
->deprecated_sym_stab_info
= (struct dbx_symfile_info
*)
539 xmalloc (sizeof (struct dbx_symfile_info
));
540 memset ((char *) objfile
->deprecated_sym_stab_info
, 0, sizeof (struct dbx_symfile_info
));
541 make_cleanup (free_elfinfo
, (void *) objfile
);
543 /* Process the normal ELF symbol table first. This may write some
544 chain of info into the dbx_symfile_info in objfile->deprecated_sym_stab_info,
545 which can later be used by elfstab_offset_sections. */
547 storage_needed
= bfd_get_symtab_upper_bound (objfile
->obfd
);
548 if (storage_needed
< 0)
549 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile
->obfd
),
550 bfd_errmsg (bfd_get_error ()));
552 if (storage_needed
> 0)
554 symbol_table
= (asymbol
**) xmalloc (storage_needed
);
555 make_cleanup (xfree
, symbol_table
);
556 symcount
= bfd_canonicalize_symtab (objfile
->obfd
, symbol_table
);
559 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile
->obfd
),
560 bfd_errmsg (bfd_get_error ()));
562 elf_symtab_read (objfile
, 0, symcount
, symbol_table
);
565 /* Add the dynamic symbols. */
567 storage_needed
= bfd_get_dynamic_symtab_upper_bound (objfile
->obfd
);
569 if (storage_needed
> 0)
571 dyn_symbol_table
= (asymbol
**) xmalloc (storage_needed
);
572 make_cleanup (xfree
, dyn_symbol_table
);
573 dynsymcount
= bfd_canonicalize_dynamic_symtab (objfile
->obfd
,
577 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile
->obfd
),
578 bfd_errmsg (bfd_get_error ()));
580 elf_symtab_read (objfile
, 1, dynsymcount
, dyn_symbol_table
);
583 /* Add synthetic symbols - for instance, names for any PLT entries. */
585 synthcount
= bfd_get_synthetic_symtab (abfd
, symcount
, symbol_table
,
586 dynsymcount
, dyn_symbol_table
,
590 asymbol
**synth_symbol_table
;
593 make_cleanup (xfree
, synthsyms
);
594 synth_symbol_table
= xmalloc (sizeof (asymbol
*) * synthcount
);
595 for (i
= 0; i
< synthcount
; i
++)
596 synth_symbol_table
[i
] = synthsyms
+ i
;
597 make_cleanup (xfree
, synth_symbol_table
);
598 elf_symtab_read (objfile
, 0, synthcount
, synth_symbol_table
);
601 /* Install any minimal symbols that have been collected as the current
602 minimal symbols for this objfile. The debug readers below this point
603 should not generate new minimal symbols; if they do it's their
604 responsibility to install them. "mdebug" appears to be the only one
605 which will do this. */
607 install_minimal_symbols (objfile
);
608 do_cleanups (back_to
);
610 /* Now process debugging information, which is contained in
611 special ELF sections. */
613 /* If we are reinitializing, or if we have never loaded syms yet,
614 set table to empty. MAINLINE is cleared so that *_read_psymtab
615 functions do not all also re-initialize the psymbol table. */
618 init_psymbol_list (objfile
, 0);
622 /* We first have to find them... */
623 bfd_map_over_sections (abfd
, elf_locate_sections
, (void *) & ei
);
625 /* ELF debugging information is inserted into the psymtab in the
626 order of least informative first - most informative last. Since
627 the psymtab table is searched `most recent insertion first' this
628 increases the probability that more detailed debug information
629 for a section is found.
631 For instance, an object file might contain both .mdebug (XCOFF)
632 and .debug_info (DWARF2) sections then .mdebug is inserted first
633 (searched last) and DWARF2 is inserted last (searched first). If
634 we don't do this then the XCOFF info is found first - for code in
635 an included file XCOFF info is useless. */
639 const struct ecoff_debug_swap
*swap
;
641 /* .mdebug section, presumably holding ECOFF debugging
643 swap
= get_elf_backend_data (abfd
)->elf_backend_ecoff_debug_swap
;
645 elfmdebug_build_psymtabs (objfile
, swap
, ei
.mdebugsect
);
651 /* Stab sections have an associated string table that looks like
652 a separate section. */
653 str_sect
= bfd_get_section_by_name (abfd
, ".stabstr");
655 /* FIXME should probably warn about a stab section without a stabstr. */
657 elfstab_build_psymtabs (objfile
,
661 bfd_section_size (abfd
, str_sect
));
663 if (dwarf2_has_info (objfile
))
665 /* DWARF 2 sections */
666 dwarf2_build_psymtabs (objfile
, mainline
);
669 /* FIXME: kettenis/20030504: This still needs to be integrated with
670 dwarf2read.c in a better way. */
671 dwarf2_build_frame_info (objfile
);
674 /* This cleans up the objfile's deprecated_sym_stab_info pointer, and
675 the chain of stab_section_info's, that might be dangling from
679 free_elfinfo (void *objp
)
681 struct objfile
*objfile
= (struct objfile
*) objp
;
682 struct dbx_symfile_info
*dbxinfo
= objfile
->deprecated_sym_stab_info
;
683 struct stab_section_info
*ssi
, *nssi
;
685 ssi
= dbxinfo
->stab_section_info
;
693 dbxinfo
->stab_section_info
= 0; /* Just say No mo info about this. */
697 /* Initialize anything that needs initializing when a completely new symbol
698 file is specified (not just adding some symbols from another file, e.g. a
701 We reinitialize buildsym, since we may be reading stabs from an ELF file. */
704 elf_new_init (struct objfile
*ignore
)
706 stabsread_new_init ();
707 buildsym_new_init ();
710 /* Perform any local cleanups required when we are done with a particular
711 objfile. I.E, we are in the process of discarding all symbol information
712 for an objfile, freeing up all memory held for it, and unlinking the
713 objfile struct from the global list of known objfiles. */
716 elf_symfile_finish (struct objfile
*objfile
)
718 if (objfile
->deprecated_sym_stab_info
!= NULL
)
720 xfree (objfile
->deprecated_sym_stab_info
);
724 /* ELF specific initialization routine for reading symbols.
726 It is passed a pointer to a struct sym_fns which contains, among other
727 things, the BFD for the file whose symbols are being read, and a slot for
728 a pointer to "private data" which we can fill with goodies.
730 For now at least, we have nothing in particular to do, so this function is
734 elf_symfile_init (struct objfile
*objfile
)
736 /* ELF objects may be reordered, so set OBJF_REORDERED. If we
737 find this causes a significant slowdown in gdb then we could
738 set it in the debug symbol readers only when necessary. */
739 objfile
->flags
|= OBJF_REORDERED
;
742 /* When handling an ELF file that contains Sun STABS debug info,
743 some of the debug info is relative to the particular chunk of the
744 section that was generated in its individual .o file. E.g.
745 offsets to static variables are relative to the start of the data
746 segment *for that module before linking*. This information is
747 painfully squirreled away in the ELF symbol table as local symbols
748 with wierd names. Go get 'em when needed. */
751 elfstab_offset_sections (struct objfile
*objfile
, struct partial_symtab
*pst
)
753 char *filename
= pst
->filename
;
754 struct dbx_symfile_info
*dbx
= objfile
->deprecated_sym_stab_info
;
755 struct stab_section_info
*maybe
= dbx
->stab_section_info
;
756 struct stab_section_info
*questionable
= 0;
760 /* The ELF symbol info doesn't include path names, so strip the path
761 (if any) from the psymtab filename. */
762 while (0 != (p
= strchr (filename
, '/')))
765 /* FIXME: This linear search could speed up significantly
766 if it was chained in the right order to match how we search it,
767 and if we unchained when we found a match. */
768 for (; maybe
; maybe
= maybe
->next
)
770 if (filename
[0] == maybe
->filename
[0]
771 && strcmp (filename
, maybe
->filename
) == 0)
773 /* We found a match. But there might be several source files
774 (from different directories) with the same name. */
775 if (0 == maybe
->found
)
777 questionable
= maybe
; /* Might use it later. */
781 if (maybe
== 0 && questionable
!= 0)
783 complaint (&symfile_complaints
,
784 _("elf/stab section information questionable for %s"), filename
);
785 maybe
= questionable
;
790 /* Found it! Allocate a new psymtab struct, and fill it in. */
792 pst
->section_offsets
= (struct section_offsets
*)
793 obstack_alloc (&objfile
->objfile_obstack
,
794 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
795 for (i
= 0; i
< maybe
->num_sections
; i
++)
796 (pst
->section_offsets
)->offsets
[i
] = maybe
->sections
[i
];
800 /* We were unable to find any offsets for this file. Complain. */
801 if (dbx
->stab_section_info
) /* If there *is* any info, */
802 complaint (&symfile_complaints
,
803 _("elf/stab section information missing for %s"), filename
);
806 /* Register that we are able to handle ELF object file formats. */
808 static struct sym_fns elf_sym_fns
=
810 bfd_target_elf_flavour
,
811 elf_new_init
, /* sym_new_init: init anything gbl to entire symtab */
812 elf_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
813 elf_symfile_read
, /* sym_read: read a symbol file into symtab */
814 elf_symfile_finish
, /* sym_finish: finished with file, cleanup */
815 default_symfile_offsets
, /* sym_offsets: Translate ext. to int. relocation */
816 elf_symfile_segments
, /* sym_segments: Get segment information from
818 NULL
/* next: pointer to next struct sym_fns */
822 _initialize_elfread (void)
824 add_symtab_fns (&elf_sym_fns
);