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, 2008
5 Free Software Foundation, Inc.
7 Written by Fred Fish at Cygnus Support.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "gdb_string.h"
28 #include "elf/common.h"
29 #include "elf/internal.h"
35 #include "stabsread.h"
36 #include "gdb-stabs.h"
37 #include "complaints.h"
40 extern void _initialize_elfread (void);
42 /* The struct elfinfo is available only during ELF symbol table and
43 psymtab reading. It is destroyed at the completion of psymtab-reading.
44 It's local to elf_symfile_read. */
48 asection *stabsect; /* Section pointer for .stab section */
49 asection *stabindexsect; /* Section pointer for .stab.index section */
50 asection *mdebugsect; /* Section pointer for .mdebug section */
53 static void free_elfinfo (void *);
55 /* Locate the segments in ABFD. */
57 static struct symfile_segment_data *
58 elf_symfile_segments (bfd *abfd)
60 Elf_Internal_Phdr *phdrs, **segments;
62 int num_phdrs, num_segments, num_sections, i;
64 struct symfile_segment_data *data;
66 phdrs_size = bfd_get_elf_phdr_upper_bound (abfd);
70 phdrs = alloca (phdrs_size);
71 num_phdrs = bfd_get_elf_phdrs (abfd, phdrs);
76 segments = alloca (sizeof (Elf_Internal_Phdr *) * num_phdrs);
77 for (i = 0; i < num_phdrs; i++)
78 if (phdrs[i].p_type == PT_LOAD)
79 segments[num_segments++] = &phdrs[i];
81 if (num_segments == 0)
84 data = XZALLOC (struct symfile_segment_data);
85 data->num_segments = num_segments;
86 data->segment_bases = XCALLOC (num_segments, CORE_ADDR);
87 data->segment_sizes = XCALLOC (num_segments, CORE_ADDR);
89 for (i = 0; i < num_segments; i++)
91 data->segment_bases[i] = segments[i]->p_vaddr;
92 data->segment_sizes[i] = segments[i]->p_memsz;
95 num_sections = bfd_count_sections (abfd);
96 data->segment_info = XCALLOC (num_sections, int);
98 for (i = 0, sect = abfd->sections; sect != NULL; i++, sect = sect->next)
103 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
106 vma = bfd_get_section_vma (abfd, sect);
108 for (j = 0; j < num_segments; j++)
109 if (segments[j]->p_memsz > 0
110 && vma >= segments[j]->p_vaddr
111 && vma < segments[j]->p_vaddr + segments[j]->p_memsz)
113 data->segment_info[i] = j + 1;
117 if (bfd_get_section_size (sect) > 0 && j == num_segments)
118 warning (_("Loadable segment \"%s\" outside of ELF segments"),
119 bfd_section_name (abfd, sect));
125 /* We are called once per section from elf_symfile_read. We
126 need to examine each section we are passed, check to see
127 if it is something we are interested in processing, and
128 if so, stash away some access information for the section.
130 For now we recognize the dwarf debug information sections and
131 line number sections from matching their section names. The
132 ELF definition is no real help here since it has no direct
133 knowledge of DWARF (by design, so any debugging format can be
136 We also recognize the ".stab" sections used by the Sun compilers
137 released with Solaris 2.
139 FIXME: The section names should not be hardwired strings (what
140 should they be? I don't think most object file formats have enough
141 section flags to specify what kind of debug section it is
145 elf_locate_sections (bfd *ignore_abfd, asection *sectp, void *eip)
149 ei = (struct elfinfo *) eip;
150 if (strcmp (sectp->name, ".stab") == 0)
152 ei->stabsect = sectp;
154 else if (strcmp (sectp->name, ".stab.index") == 0)
156 ei->stabindexsect = sectp;
158 else if (strcmp (sectp->name, ".mdebug") == 0)
160 ei->mdebugsect = sectp;
164 static struct minimal_symbol *
165 record_minimal_symbol (char *name, CORE_ADDR address,
166 enum minimal_symbol_type ms_type,
167 asection *bfd_section, struct objfile *objfile)
169 struct gdbarch *gdbarch = get_objfile_arch (objfile);
171 if (ms_type == mst_text || ms_type == mst_file_text)
172 address = gdbarch_smash_text_address (gdbarch, address);
174 return prim_record_minimal_symbol_and_info
175 (name, address, ms_type, NULL, bfd_section->index, bfd_section, objfile);
182 elf_symtab_read -- read the symbol table of an ELF file
186 void elf_symtab_read (struct objfile *objfile, int type,
187 long number_of_symbols, asymbol **symbol_table)
191 Given an objfile, a symbol table, and a flag indicating whether the
192 symbol table contains regular, dynamic, or synthetic symbols, add all
193 the global function and data symbols to the minimal symbol table.
195 In stabs-in-ELF, as implemented by Sun, there are some local symbols
196 defined in the ELF symbol table, which can be used to locate
197 the beginnings of sections from each ".o" file that was linked to
198 form the executable objfile. We gather any such info and record it
199 in data structures hung off the objfile's private data.
205 #define ST_SYNTHETIC 2
208 elf_symtab_read (struct objfile *objfile, int type,
209 long number_of_symbols, asymbol **symbol_table)
211 struct gdbarch *gdbarch = get_objfile_arch (objfile);
217 enum minimal_symbol_type ms_type;
218 /* If sectinfo is nonNULL, it contains section info that should end up
219 filed in the objfile. */
220 struct stab_section_info *sectinfo = NULL;
221 /* If filesym is nonzero, it points to a file symbol, but we haven't
222 seen any section info for it yet. */
223 asymbol *filesym = 0;
224 /* Name of filesym, as saved on the objfile_obstack. */
225 char *filesymname = obsavestring ("", 0, &objfile->objfile_obstack);
226 struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info;
227 int stripped = (bfd_get_symcount (objfile->obfd) == 0);
229 for (i = 0; i < number_of_symbols; i++)
231 sym = symbol_table[i];
232 if (sym->name == NULL || *sym->name == '\0')
234 /* Skip names that don't exist (shouldn't happen), or names
235 that are null strings (may happen). */
239 /* Skip "special" symbols, e.g. ARM mapping symbols. These are
240 symbols which do not correspond to objects in the symbol table,
241 but have some other target-specific meaning. */
242 if (bfd_is_target_special_symbol (objfile->obfd, sym))
245 offset = ANOFFSET (objfile->section_offsets, sym->section->index);
246 if (type == ST_DYNAMIC
247 && sym->section == &bfd_und_section
248 && (sym->flags & BSF_FUNCTION))
250 struct minimal_symbol *msym;
251 bfd *abfd = objfile->obfd;
254 /* Symbol is a reference to a function defined in
256 If its value is non zero then it is usually the address
257 of the corresponding entry in the procedure linkage table,
258 plus the desired section offset.
259 If its value is zero then the dynamic linker has to resolve
260 the symbol. We are unable to find any meaningful address
261 for this symbol in the executable file, so we skip it. */
262 symaddr = sym->value;
266 /* sym->section is the undefined section. However, we want to
267 record the section where the PLT stub resides with the
268 minimal symbol. Search the section table for the one that
269 covers the stub's address. */
270 for (sect = abfd->sections; sect != NULL; sect = sect->next)
272 if ((bfd_get_section_flags (abfd, sect) & SEC_ALLOC) == 0)
275 if (symaddr >= bfd_get_section_vma (abfd, sect)
276 && symaddr < bfd_get_section_vma (abfd, sect)
277 + bfd_get_section_size (sect))
283 symaddr += ANOFFSET (objfile->section_offsets, sect->index);
285 msym = record_minimal_symbol
286 ((char *) sym->name, symaddr, mst_solib_trampoline, sect, objfile);
288 msym->filename = filesymname;
292 /* If it is a nonstripped executable, do not enter dynamic
293 symbols, as the dynamic symbol table is usually a subset
294 of the main symbol table. */
295 if (type == ST_DYNAMIC && !stripped)
297 if (sym->flags & BSF_FILE)
299 /* STT_FILE debugging symbol that helps stabs-in-elf debugging.
300 Chain any old one onto the objfile; remember new sym. */
301 if (sectinfo != NULL)
303 sectinfo->next = dbx->stab_section_info;
304 dbx->stab_section_info = sectinfo;
309 obsavestring ((char *) filesym->name, strlen (filesym->name),
310 &objfile->objfile_obstack);
312 else if (sym->flags & BSF_SECTION_SYM)
314 else if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
316 struct minimal_symbol *msym;
318 /* Select global/local/weak symbols. Note that bfd puts abs
319 symbols in their own section, so all symbols we are
320 interested in will have a section. */
321 /* Bfd symbols are section relative. */
322 symaddr = sym->value + sym->section->vma;
323 /* Relocate all non-absolute symbols by the section offset. */
324 if (sym->section != &bfd_abs_section)
328 /* For non-absolute symbols, use the type of the section
329 they are relative to, to intuit text/data. Bfd provides
330 no way of figuring this out for absolute symbols. */
331 if (sym->section == &bfd_abs_section)
333 /* This is a hack to get the minimal symbol type
334 right for Irix 5, which has absolute addresses
335 with special section indices for dynamic symbols.
337 NOTE: uweigand-20071112: Synthetic symbols do not
338 have an ELF-private part, so do not touch those. */
339 unsigned int shndx = type == ST_SYNTHETIC ? 0 :
340 ((elf_symbol_type *) sym)->internal_elf_sym.st_shndx;
350 case SHN_MIPS_ACOMMON:
357 /* If it is an Irix dynamic symbol, skip section name
358 symbols, relocate all others by section offset. */
359 if (ms_type != mst_abs)
361 if (sym->name[0] == '.')
366 else if (sym->section->flags & SEC_CODE)
368 if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
372 else if ((sym->name[0] == '.' && sym->name[1] == 'L')
373 || ((sym->flags & BSF_LOCAL)
374 && sym->name[0] == '$'
375 && sym->name[1] == 'L'))
376 /* Looks like a compiler-generated label. Skip
377 it. The assembler should be skipping these (to
378 keep executables small), but apparently with
379 gcc on the (deleted) delta m88k SVR4, it loses.
380 So to have us check too should be harmless (but
381 I encourage people to fix this in the assembler
382 instead of adding checks here). */
386 ms_type = mst_file_text;
389 else if (sym->section->flags & SEC_ALLOC)
391 if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
393 if (sym->section->flags & SEC_LOAD)
402 else if (sym->flags & BSF_LOCAL)
404 /* Named Local variable in a Data section.
405 Check its name for stabs-in-elf. */
406 int special_local_sect;
407 if (strcmp ("Bbss.bss", sym->name) == 0)
408 special_local_sect = SECT_OFF_BSS (objfile);
409 else if (strcmp ("Ddata.data", sym->name) == 0)
410 special_local_sect = SECT_OFF_DATA (objfile);
411 else if (strcmp ("Drodata.rodata", sym->name) == 0)
412 special_local_sect = SECT_OFF_RODATA (objfile);
414 special_local_sect = -1;
415 if (special_local_sect >= 0)
417 /* Found a special local symbol. Allocate a
418 sectinfo, if needed, and fill it in. */
419 if (sectinfo == NULL)
425 = max (SECT_OFF_BSS (objfile),
426 max (SECT_OFF_DATA (objfile),
427 SECT_OFF_RODATA (objfile)));
429 /* max_index is the largest index we'll
430 use into this array, so we must
431 allocate max_index+1 elements for it.
432 However, 'struct stab_section_info'
433 already includes one element, so we
434 need to allocate max_index aadditional
436 size = (sizeof (struct stab_section_info)
437 + (sizeof (CORE_ADDR)
439 sectinfo = (struct stab_section_info *)
441 memset (sectinfo, 0, size);
442 sectinfo->num_sections = max_index;
445 complaint (&symfile_complaints,
446 _("elf/stab section information %s without a preceding file symbol"),
452 (char *) filesym->name;
455 if (sectinfo->sections[special_local_sect] != 0)
456 complaint (&symfile_complaints,
457 _("duplicated elf/stab section information for %s"),
459 /* BFD symbols are section relative. */
460 symaddr = sym->value + sym->section->vma;
461 /* Relocate non-absolute symbols by the
463 if (sym->section != &bfd_abs_section)
465 sectinfo->sections[special_local_sect] = symaddr;
466 /* The special local symbols don't go in the
467 minimal symbol table, so ignore this one. */
470 /* Not a special stabs-in-elf symbol, do regular
471 symbol processing. */
472 if (sym->section->flags & SEC_LOAD)
474 ms_type = mst_file_data;
478 ms_type = mst_file_bss;
483 ms_type = mst_unknown;
488 /* FIXME: Solaris2 shared libraries include lots of
489 odd "absolute" and "undefined" symbols, that play
490 hob with actions like finding what function the PC
491 is in. Ignore them if they aren't text, data, or bss. */
492 /* ms_type = mst_unknown; */
493 continue; /* Skip this symbol. */
495 msym = record_minimal_symbol
496 ((char *) sym->name, symaddr,
497 ms_type, sym->section, objfile);
501 /* Pass symbol size field in via BFD. FIXME!!! */
502 elf_symbol_type *elf_sym;
504 /* NOTE: uweigand-20071112: A synthetic symbol does not have an
505 ELF-private part. However, in some cases (e.g. synthetic
506 'dot' symbols on ppc64) the udata.p entry is set to point back
507 to the original ELF symbol it was derived from. Get the size
509 if (type != ST_SYNTHETIC)
510 elf_sym = (elf_symbol_type *) sym;
512 elf_sym = (elf_symbol_type *) sym->udata.p;
515 MSYMBOL_SIZE(msym) = elf_sym->internal_elf_sym.st_size;
518 msym->filename = filesymname;
519 gdbarch_elf_make_msymbol_special (gdbarch, sym, msym);
524 /* Scan and build partial symbols for a symbol file.
525 We have been initialized by a call to elf_symfile_init, which
526 currently does nothing.
528 SECTION_OFFSETS is a set of offsets to apply to relocate the symbols
529 in each section. We simplify it down to a single offset for all
532 MAINLINE is true if we are reading the main symbol
533 table (as opposed to a shared lib or dynamically loaded file).
535 This function only does the minimum work necessary for letting the
536 user "name" things symbolically; it does not read the entire symtab.
537 Instead, it reads the external and static symbols and puts them in partial
538 symbol tables. When more extensive information is requested of a
539 file, the corresponding partial symbol table is mutated into a full
540 fledged symbol table by going back and reading the symbols
543 We look for sections with specific names, to tell us what debug
544 format to look for: FIXME!!!
546 elfstab_build_psymtabs() handles STABS symbols;
547 mdebug_build_psymtabs() handles ECOFF debugging information.
549 Note that ELF files have a "minimal" symbol table, which looks a lot
550 like a COFF symbol table, but has only the minimal information necessary
551 for linking. We process this also, and use the information to
552 build gdb's minimal symbol table. This gives us some minimal debugging
553 capability even for files compiled without -g. */
556 elf_symfile_read (struct objfile *objfile, int mainline)
558 bfd *abfd = objfile->obfd;
560 struct cleanup *back_to;
562 long symcount = 0, dynsymcount = 0, synthcount, storage_needed;
563 asymbol **symbol_table = NULL, **dyn_symbol_table = NULL;
566 init_minimal_symbol_collection ();
567 back_to = make_cleanup_discard_minimal_symbols ();
569 memset ((char *) &ei, 0, sizeof (ei));
571 /* Allocate struct to keep track of the symfile */
572 objfile->deprecated_sym_stab_info = (struct dbx_symfile_info *)
573 xmalloc (sizeof (struct dbx_symfile_info));
574 memset ((char *) objfile->deprecated_sym_stab_info, 0, sizeof (struct dbx_symfile_info));
575 make_cleanup (free_elfinfo, (void *) objfile);
577 /* Process the normal ELF symbol table first. This may write some
578 chain of info into the dbx_symfile_info in objfile->deprecated_sym_stab_info,
579 which can later be used by elfstab_offset_sections. */
581 storage_needed = bfd_get_symtab_upper_bound (objfile->obfd);
582 if (storage_needed < 0)
583 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
584 bfd_errmsg (bfd_get_error ()));
586 if (storage_needed > 0)
588 symbol_table = (asymbol **) xmalloc (storage_needed);
589 make_cleanup (xfree, symbol_table);
590 symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table);
593 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
594 bfd_errmsg (bfd_get_error ()));
596 elf_symtab_read (objfile, ST_REGULAR, symcount, symbol_table);
599 /* Add the dynamic symbols. */
601 storage_needed = bfd_get_dynamic_symtab_upper_bound (objfile->obfd);
603 if (storage_needed > 0)
605 dyn_symbol_table = (asymbol **) xmalloc (storage_needed);
606 make_cleanup (xfree, dyn_symbol_table);
607 dynsymcount = bfd_canonicalize_dynamic_symtab (objfile->obfd,
611 error (_("Can't read symbols from %s: %s"), bfd_get_filename (objfile->obfd),
612 bfd_errmsg (bfd_get_error ()));
614 elf_symtab_read (objfile, ST_DYNAMIC, dynsymcount, dyn_symbol_table);
617 /* Add synthetic symbols - for instance, names for any PLT entries. */
619 synthcount = bfd_get_synthetic_symtab (abfd, symcount, symbol_table,
620 dynsymcount, dyn_symbol_table,
624 asymbol **synth_symbol_table;
627 make_cleanup (xfree, synthsyms);
628 synth_symbol_table = xmalloc (sizeof (asymbol *) * synthcount);
629 for (i = 0; i < synthcount; i++)
630 synth_symbol_table[i] = synthsyms + i;
631 make_cleanup (xfree, synth_symbol_table);
632 elf_symtab_read (objfile, ST_SYNTHETIC, synthcount, synth_symbol_table);
635 /* Install any minimal symbols that have been collected as the current
636 minimal symbols for this objfile. The debug readers below this point
637 should not generate new minimal symbols; if they do it's their
638 responsibility to install them. "mdebug" appears to be the only one
639 which will do this. */
641 install_minimal_symbols (objfile);
642 do_cleanups (back_to);
644 /* Now process debugging information, which is contained in
645 special ELF sections. */
647 /* If we are reinitializing, or if we have never loaded syms yet,
648 set table to empty. MAINLINE is cleared so that *_read_psymtab
649 functions do not all also re-initialize the psymbol table. */
652 init_psymbol_list (objfile, 0);
656 /* We first have to find them... */
657 bfd_map_over_sections (abfd, elf_locate_sections, (void *) & ei);
659 /* ELF debugging information is inserted into the psymtab in the
660 order of least informative first - most informative last. Since
661 the psymtab table is searched `most recent insertion first' this
662 increases the probability that more detailed debug information
663 for a section is found.
665 For instance, an object file might contain both .mdebug (XCOFF)
666 and .debug_info (DWARF2) sections then .mdebug is inserted first
667 (searched last) and DWARF2 is inserted last (searched first). If
668 we don't do this then the XCOFF info is found first - for code in
669 an included file XCOFF info is useless. */
673 const struct ecoff_debug_swap *swap;
675 /* .mdebug section, presumably holding ECOFF debugging
677 swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
679 elfmdebug_build_psymtabs (objfile, swap, ei.mdebugsect);
685 /* Stab sections have an associated string table that looks like
686 a separate section. */
687 str_sect = bfd_get_section_by_name (abfd, ".stabstr");
689 /* FIXME should probably warn about a stab section without a stabstr. */
691 elfstab_build_psymtabs (objfile,
695 bfd_section_size (abfd, str_sect));
697 if (dwarf2_has_info (objfile))
699 /* DWARF 2 sections */
700 dwarf2_build_psymtabs (objfile, mainline);
703 /* FIXME: kettenis/20030504: This still needs to be integrated with
704 dwarf2read.c in a better way. */
705 dwarf2_build_frame_info (objfile);
708 /* This cleans up the objfile's deprecated_sym_stab_info pointer, and
709 the chain of stab_section_info's, that might be dangling from
713 free_elfinfo (void *objp)
715 struct objfile *objfile = (struct objfile *) objp;
716 struct dbx_symfile_info *dbxinfo = objfile->deprecated_sym_stab_info;
717 struct stab_section_info *ssi, *nssi;
719 ssi = dbxinfo->stab_section_info;
727 dbxinfo->stab_section_info = 0; /* Just say No mo info about this. */
731 /* Initialize anything that needs initializing when a completely new symbol
732 file is specified (not just adding some symbols from another file, e.g. a
735 We reinitialize buildsym, since we may be reading stabs from an ELF file. */
738 elf_new_init (struct objfile *ignore)
740 stabsread_new_init ();
741 buildsym_new_init ();
744 /* Perform any local cleanups required when we are done with a particular
745 objfile. I.E, we are in the process of discarding all symbol information
746 for an objfile, freeing up all memory held for it, and unlinking the
747 objfile struct from the global list of known objfiles. */
750 elf_symfile_finish (struct objfile *objfile)
752 if (objfile->deprecated_sym_stab_info != NULL)
754 xfree (objfile->deprecated_sym_stab_info);
757 dwarf2_free_objfile (objfile);
760 /* ELF specific initialization routine for reading symbols.
762 It is passed a pointer to a struct sym_fns which contains, among other
763 things, the BFD for the file whose symbols are being read, and a slot for
764 a pointer to "private data" which we can fill with goodies.
766 For now at least, we have nothing in particular to do, so this function is
770 elf_symfile_init (struct objfile *objfile)
772 /* ELF objects may be reordered, so set OBJF_REORDERED. If we
773 find this causes a significant slowdown in gdb then we could
774 set it in the debug symbol readers only when necessary. */
775 objfile->flags |= OBJF_REORDERED;
778 /* When handling an ELF file that contains Sun STABS debug info,
779 some of the debug info is relative to the particular chunk of the
780 section that was generated in its individual .o file. E.g.
781 offsets to static variables are relative to the start of the data
782 segment *for that module before linking*. This information is
783 painfully squirreled away in the ELF symbol table as local symbols
784 with wierd names. Go get 'em when needed. */
787 elfstab_offset_sections (struct objfile *objfile, struct partial_symtab *pst)
789 char *filename = pst->filename;
790 struct dbx_symfile_info *dbx = objfile->deprecated_sym_stab_info;
791 struct stab_section_info *maybe = dbx->stab_section_info;
792 struct stab_section_info *questionable = 0;
796 /* The ELF symbol info doesn't include path names, so strip the path
797 (if any) from the psymtab filename. */
798 while (0 != (p = strchr (filename, '/')))
801 /* FIXME: This linear search could speed up significantly
802 if it was chained in the right order to match how we search it,
803 and if we unchained when we found a match. */
804 for (; maybe; maybe = maybe->next)
806 if (filename[0] == maybe->filename[0]
807 && strcmp (filename, maybe->filename) == 0)
809 /* We found a match. But there might be several source files
810 (from different directories) with the same name. */
811 if (0 == maybe->found)
813 questionable = maybe; /* Might use it later. */
817 if (maybe == 0 && questionable != 0)
819 complaint (&symfile_complaints,
820 _("elf/stab section information questionable for %s"), filename);
821 maybe = questionable;
826 /* Found it! Allocate a new psymtab struct, and fill it in. */
828 pst->section_offsets = (struct section_offsets *)
829 obstack_alloc (&objfile->objfile_obstack,
830 SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
831 for (i = 0; i < maybe->num_sections; i++)
832 (pst->section_offsets)->offsets[i] = maybe->sections[i];
836 /* We were unable to find any offsets for this file. Complain. */
837 if (dbx->stab_section_info) /* If there *is* any info, */
838 complaint (&symfile_complaints,
839 _("elf/stab section information missing for %s"), filename);
842 /* Register that we are able to handle ELF object file formats. */
844 static struct sym_fns elf_sym_fns =
846 bfd_target_elf_flavour,
847 elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
848 elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
849 elf_symfile_read, /* sym_read: read a symbol file into symtab */
850 elf_symfile_finish, /* sym_finish: finished with file, cleanup */
851 default_symfile_offsets, /* sym_offsets: Translate ext. to int. relocation */
852 elf_symfile_segments, /* sym_segments: Get segment information from
854 NULL, /* sym_read_linetable */
855 NULL /* next: pointer to next struct sym_fns */
859 _initialize_elfread (void)
861 add_symtab_fns (&elf_sym_fns);