1991-10-24 12:28:54 +01:00
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/* Read ELF (Executable and Linking Format) object files for GDB.
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1992-03-28 00:56:15 +01:00
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Copyright 1991, 1992 Free Software Foundation, Inc.
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1991-10-24 12:28:54 +01:00
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Written by Fred Fish at Cygnus Support.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/************************************************************************
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* *
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* NOTICE *
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* *
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* This file is still under construction. When it is complete, this *
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* notice will be removed. Until then, direct any questions or changes *
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1992-03-28 00:56:15 +01:00
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* to Fred Fish at Cygnus Support (fnf@cygnus.com) *
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1991-10-24 12:28:54 +01:00
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* *
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* FIXME Still needs support for shared libraries. *
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* FIXME Still needs support for core files. *
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* FIXME The ".debug" and ".line" section names are hardwired. *
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* *
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************************************************************************/
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#include "defs.h"
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1991-12-01 07:47:23 +01:00
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#include "elf/common.h"
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#include "elf/external.h"
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#include "elf/internal.h"
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1991-10-24 12:28:54 +01:00
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#include "bfd.h"
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#include "symtab.h"
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1992-02-22 02:46:16 +01:00
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#include "symfile.h"
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1992-03-21 02:56:01 +01:00
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#include "objfiles.h"
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1991-11-09 11:50:07 +01:00
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1991-10-24 12:28:54 +01:00
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#define STREQ(a,b) (strcmp((a),(b))==0)
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struct elfinfo {
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unsigned int dboffset; /* Offset to dwarf debug section */
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unsigned int dbsize; /* Size of dwarf debug section */
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unsigned int lnoffset; /* Offset to dwarf line number section */
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unsigned int lnsize; /* Size of dwarf line number section */
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};
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1992-02-22 02:46:16 +01:00
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static void
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* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
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elf_symfile_init PARAMS ((struct objfile *));
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1992-02-22 02:46:16 +01:00
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static void
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* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
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elf_new_init PARAMS ((struct objfile *));
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1992-02-22 02:46:16 +01:00
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static void
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* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
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elf_symfile_read PARAMS ((struct objfile *, CORE_ADDR, int));
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static void
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elf_symfile_finish PARAMS ((struct objfile *));
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1992-02-22 02:46:16 +01:00
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static void
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elf_symtab_read PARAMS ((bfd *, CORE_ADDR, int, struct objfile *));
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static void
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record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type,
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struct objfile *));
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static void
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elf_locate_sections PARAMS ((bfd *, asection *, PTR));
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1991-10-24 12:28:54 +01:00
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/* We are called once per section from elf_symfile_read. We
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need to examine each section we are passed, check to see
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if it is something we are interested in processing, and
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if so, stash away some access information for the section.
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For now we recognize the dwarf debug information sections and
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line number sections from matching their section names. The
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ELF definition is no real help here since it has no direct
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knowledge of DWARF (by design, so any debugging format can be
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used).
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FIXME: The section names should not be hardwired strings. */
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static void
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1992-02-22 02:46:16 +01:00
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elf_locate_sections (abfd, sectp, eip)
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bfd *abfd;
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asection *sectp;
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PTR eip;
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1991-10-24 12:28:54 +01:00
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{
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1992-02-22 02:46:16 +01:00
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register struct elfinfo *ei;
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ei = (struct elfinfo *) eip;
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1991-10-24 12:28:54 +01:00
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if (STREQ (sectp -> name, ".debug"))
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{
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ei -> dboffset = sectp -> filepos;
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1992-01-25 00:13:14 +01:00
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ei -> dbsize = bfd_get_section_size_before_reloc (sectp);
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1991-10-24 12:28:54 +01:00
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}
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else if (STREQ (sectp -> name, ".line"))
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{
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ei -> lnoffset = sectp -> filepos;
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1992-01-25 00:13:14 +01:00
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ei -> lnsize = bfd_get_section_size_before_reloc (sectp);
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1991-10-24 12:28:54 +01:00
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}
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}
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1992-02-22 02:46:16 +01:00
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#if 0 /* Currently unused */
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1991-12-16 21:57:28 +01:00
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char *
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1992-02-22 02:46:16 +01:00
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elf_interpreter (abfd)
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bfd *abfd;
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1991-12-16 21:57:28 +01:00
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{
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sec_ptr interp_sec;
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unsigned size;
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char *interp = NULL;
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interp_sec = bfd_get_section_by_name (abfd, ".interp");
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if (interp_sec)
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{
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size = bfd_section_size (abfd, interp_sec);
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interp = alloca (size);
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if (bfd_get_section_contents (abfd, interp_sec, interp, (file_ptr)0,
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size))
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{
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interp = savestring (interp, size - 1);
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}
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else
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{
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interp = NULL;
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}
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}
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return (interp);
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}
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1992-02-22 02:46:16 +01:00
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#endif
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1991-11-15 04:36:45 +01:00
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/*
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LOCAL FUNCTION
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1992-02-22 02:46:16 +01:00
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record_minimal_symbol -- add entry to minimal symbol table
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1991-11-15 04:36:45 +01:00
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SYNOPSIS
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1992-02-22 02:46:16 +01:00
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static void record_minimal_symbol (char *name, CORE_ADDR address)
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1991-11-15 04:36:45 +01:00
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DESCRIPTION
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Given a pointer to the name of a symbol that should be added to the
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1992-02-22 02:46:16 +01:00
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minimal symbol table and the address associated with that symbol, records
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this information for later use in building the minimal symbol table.
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1991-11-15 04:36:45 +01:00
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*/
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static void
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1992-02-22 02:46:16 +01:00
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record_minimal_symbol (name, address, ms_type, objfile)
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char *name;
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CORE_ADDR address;
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enum minimal_symbol_type ms_type;
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struct objfile *objfile;
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1991-11-15 04:36:45 +01:00
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{
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1992-02-22 02:46:16 +01:00
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name = obsavestring (name, strlen (name), &objfile -> symbol_obstack);
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prim_record_minimal_symbol (name, address, ms_type);
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1991-11-15 04:36:45 +01:00
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}
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1991-12-16 21:57:28 +01:00
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/*
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LOCAL FUNCTION
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elf_symtab_read -- read the symbol table of an ELF file
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SYNOPSIS
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1992-02-22 02:46:16 +01:00
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void elf_symtab_read (bfd *abfd, CORE_ADDR addr, int mainline,
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struct objfile *objfile)
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1991-12-16 21:57:28 +01:00
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DESCRIPTION
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Given an open bfd, a base address to relocate symbols to, and a
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flag that specifies whether or not this bfd is for an executable
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or not (may be shared library for example), add all the global
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1992-02-22 02:46:16 +01:00
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function and data symbols to the minimal symbol table.
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1991-12-16 21:57:28 +01:00
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*/
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1991-11-15 04:36:45 +01:00
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static void
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1992-02-22 02:46:16 +01:00
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elf_symtab_read (abfd, addr, mainline, objfile)
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bfd *abfd;
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CORE_ADDR addr;
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int mainline;
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struct objfile *objfile;
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1991-11-15 04:36:45 +01:00
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{
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unsigned int storage_needed;
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asymbol *sym;
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asymbol **symbol_table;
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unsigned int number_of_symbols;
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unsigned int i;
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struct cleanup *back_to;
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1991-12-16 21:57:28 +01:00
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CORE_ADDR symaddr;
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1992-02-22 02:46:16 +01:00
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enum minimal_symbol_type ms_type;
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1991-11-15 04:36:45 +01:00
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storage_needed = get_symtab_upper_bound (abfd);
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if (storage_needed > 0)
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{
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symbol_table = (asymbol **) bfd_xmalloc (storage_needed);
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back_to = make_cleanup (free, symbol_table);
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number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table);
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for (i = 0; i < number_of_symbols; i++)
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{
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sym = *symbol_table++;
|
1992-02-14 02:22:12 +01:00
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/* Select global/weak symbols that are defined in a specific section.
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Note that bfd now puts abs symbols in their own section, so
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all symbols we are interested in will have a section. */
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if ((sym -> flags & (BSF_GLOBAL | BSF_WEAK))
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&& (sym -> section != NULL))
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1991-11-15 04:36:45 +01:00
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{
|
1991-12-16 21:57:28 +01:00
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symaddr = sym -> value;
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1992-03-28 00:56:15 +01:00
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/* Relocate all non-absolute symbols by base address. */
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if (sym -> section != &bfd_abs_section)
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1991-12-16 21:57:28 +01:00
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{
|
|
|
|
|
symaddr += addr;
|
|
|
|
|
}
|
|
|
|
|
/* For non-absolute symbols, use the type of the section
|
|
|
|
|
they are relative to, to intuit text/data. Bfd provides
|
|
|
|
|
no way of figuring this out for absolute symbols. */
|
1992-02-14 02:22:12 +01:00
|
|
|
|
if (sym -> section -> flags & SEC_CODE)
|
1991-12-16 21:57:28 +01:00
|
|
|
|
{
|
1992-02-22 02:46:16 +01:00
|
|
|
|
ms_type = mst_text;
|
1991-12-16 21:57:28 +01:00
|
|
|
|
}
|
1992-02-14 02:22:12 +01:00
|
|
|
|
else if (sym -> section -> flags & SEC_DATA)
|
1991-12-16 21:57:28 +01:00
|
|
|
|
{
|
1992-02-22 02:46:16 +01:00
|
|
|
|
ms_type = mst_data;
|
1991-12-16 21:57:28 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
1992-02-22 02:46:16 +01:00
|
|
|
|
ms_type = mst_unknown;
|
1991-12-16 21:57:28 +01:00
|
|
|
|
}
|
1992-02-22 02:46:16 +01:00
|
|
|
|
record_minimal_symbol ((char *) sym -> name, symaddr, ms_type, objfile);
|
1991-11-15 04:36:45 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
do_cleanups (back_to);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1991-10-24 12:28:54 +01:00
|
|
|
|
/* Scan and build partial symbols for a symbol file.
|
|
|
|
|
We have been initialized by a call to elf_symfile_init, which
|
|
|
|
|
currently does nothing.
|
|
|
|
|
|
|
|
|
|
ADDR is the address relative to which the symbols in it are (e.g.
|
|
|
|
|
the base address of the text segment).
|
|
|
|
|
|
|
|
|
|
MAINLINE is true if we are reading the main symbol
|
|
|
|
|
table (as opposed to a shared lib or dynamically loaded file).
|
|
|
|
|
|
|
|
|
|
This function only does the minimum work necessary for letting the
|
|
|
|
|
user "name" things symbolically; it does not read the entire symtab.
|
|
|
|
|
Instead, it reads the external and static symbols and puts them in partial
|
|
|
|
|
symbol tables. When more extensive information is requested of a
|
|
|
|
|
file, the corresponding partial symbol table is mutated into a full
|
|
|
|
|
fledged symbol table by going back and reading the symbols
|
|
|
|
|
for real. The function dwarf_psymtab_to_symtab() is the function that
|
1991-11-15 04:36:45 +01:00
|
|
|
|
does this for DWARF symbols.
|
|
|
|
|
|
|
|
|
|
Note that ELF files have a "minimal" symbol table, which looks a lot
|
|
|
|
|
like a COFF symbol table, but has only the minimal information necessary
|
|
|
|
|
for linking. We process this also, and just use the information to
|
1992-02-22 02:46:16 +01:00
|
|
|
|
add to gdb's minimal symbol table. This gives us some minimal debugging
|
1991-11-15 04:36:45 +01:00
|
|
|
|
capability even for files compiled without -g.
|
|
|
|
|
*/
|
1991-10-24 12:28:54 +01:00
|
|
|
|
|
|
|
|
|
static void
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
elf_symfile_read (objfile, addr, mainline)
|
|
|
|
|
struct objfile *objfile;
|
1992-02-22 02:46:16 +01:00
|
|
|
|
CORE_ADDR addr;
|
|
|
|
|
int mainline;
|
1991-10-24 12:28:54 +01:00
|
|
|
|
{
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
bfd *abfd = objfile->obfd;
|
1991-10-24 12:28:54 +01:00
|
|
|
|
struct elfinfo ei;
|
1991-11-15 04:36:45 +01:00
|
|
|
|
struct cleanup *back_to;
|
1991-10-24 12:28:54 +01:00
|
|
|
|
|
1992-02-22 02:46:16 +01:00
|
|
|
|
init_minimal_symbol_collection ();
|
|
|
|
|
back_to = make_cleanup (discard_minimal_symbols, 0);
|
1991-11-15 04:36:45 +01:00
|
|
|
|
|
|
|
|
|
/* Process the normal ELF symbol table first. */
|
|
|
|
|
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
elf_symtab_read (abfd, addr, mainline, objfile);
|
1991-11-15 04:36:45 +01:00
|
|
|
|
|
|
|
|
|
/* Now process the DWARF debugging information, which is contained in
|
|
|
|
|
special ELF sections. We first have to find them... */
|
|
|
|
|
|
|
|
|
|
(void) memset ((char *) &ei, 0, sizeof (ei));
|
1992-02-22 02:46:16 +01:00
|
|
|
|
bfd_map_over_sections (abfd, elf_locate_sections, (PTR) &ei);
|
1991-10-24 12:28:54 +01:00
|
|
|
|
if (ei.dboffset && ei.lnoffset)
|
|
|
|
|
{
|
|
|
|
|
dwarf_build_psymtabs (fileno ((FILE *)(abfd -> iostream)),
|
|
|
|
|
bfd_get_filename (abfd),
|
|
|
|
|
addr, mainline,
|
|
|
|
|
ei.dboffset, ei.dbsize,
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
ei.lnoffset, ei.lnsize, objfile);
|
1991-10-24 12:28:54 +01:00
|
|
|
|
}
|
1991-11-15 04:36:45 +01:00
|
|
|
|
|
1992-02-22 02:46:16 +01:00
|
|
|
|
if (!have_partial_symbols ())
|
1991-10-24 12:28:54 +01:00
|
|
|
|
{
|
|
|
|
|
wrap_here ("");
|
|
|
|
|
printf_filtered ("(no debugging symbols found)...");
|
|
|
|
|
wrap_here ("");
|
|
|
|
|
}
|
1991-11-15 04:36:45 +01:00
|
|
|
|
|
1992-02-22 02:46:16 +01:00
|
|
|
|
/* Install any minimal symbols that have been collected as the current
|
|
|
|
|
minimal symbols for this objfile. */
|
|
|
|
|
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
install_minimal_symbols (objfile);
|
1992-02-22 02:46:16 +01:00
|
|
|
|
|
1991-11-15 04:36:45 +01:00
|
|
|
|
do_cleanups (back_to);
|
1991-10-24 12:28:54 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Initialize anything that needs initializing when a completely new symbol
|
|
|
|
|
file is specified (not just adding some symbols from another file, e.g. a
|
|
|
|
|
shared library).
|
|
|
|
|
|
|
|
|
|
For now at least, we have nothing in particular to do, so this function is
|
|
|
|
|
just a stub. */
|
|
|
|
|
|
|
|
|
|
static void
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
elf_new_init (objfile)
|
|
|
|
|
struct objfile *objfile;
|
|
|
|
|
{
|
|
|
|
|
buildsym_new_init ();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Perform any local cleanups required when we are done with a particular
|
|
|
|
|
objfile. I.E, we are in the process of discarding all symbol information
|
|
|
|
|
for an objfile, freeing up all memory held for it, and unlinking the
|
|
|
|
|
objfile struct from the global list of known objfiles. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
elf_symfile_finish (objfile)
|
|
|
|
|
struct objfile *objfile;
|
1991-10-24 12:28:54 +01:00
|
|
|
|
{
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
if (objfile -> sym_private != NULL)
|
|
|
|
|
{
|
|
|
|
|
mfree (objfile -> md, objfile -> sym_private);
|
|
|
|
|
}
|
1991-10-24 12:28:54 +01:00
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}
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/* ELF specific initialization routine for reading symbols.
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It is passed a pointer to a struct sym_fns which contains, among other
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things, the BFD for the file whose symbols are being read, and a slot for
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a pointer to "private data" which we can fill with goodies.
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For now at least, we have nothing in particular to do, so this function is
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just a stub. */
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static void
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* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
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elf_symfile_init (objfile)
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struct objfile *objfile;
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1991-10-24 12:28:54 +01:00
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{
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}
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/* Register that we are able to handle ELF object file formats and DWARF
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debugging formats.
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Unlike other object file formats, where the debugging information format
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|
is implied by the object file format, the ELF object file format and the
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DWARF debugging information format are two distinct, and potentially
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separate entities. I.E. it is perfectly possible to have ELF objects
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with debugging formats other than DWARF. And it is conceivable that the
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DWARF debugging format might be used with another object file format,
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|
like COFF, by simply using COFF's custom section feature.
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GDB, and to a lesser extent BFD, should support the notion of separate
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object file formats and debugging information formats. For now, we just
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|
use "elf" in the same sense as "a.out" or "coff", to imply both the ELF
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object file format and the DWARF debugging format. */
|
|
|
|
|
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
static struct sym_fns elf_sym_fns =
|
|
|
|
|
{
|
1991-10-24 12:28:54 +01:00
|
|
|
|
"elf", /* sym_name: name or name prefix of BFD target type */
|
|
|
|
|
3, /* sym_namelen: number of significant sym_name chars */
|
|
|
|
|
elf_new_init, /* sym_new_init: init anything gbl to entire symtab */
|
|
|
|
|
elf_symfile_init, /* sym_init: read initial info, setup for sym_read() */
|
|
|
|
|
elf_symfile_read, /* sym_read: read a symbol file into symtab */
|
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (coff_symfile_finish): Add function, prototype, and
add to the xxxx_sym_fns struct for each file type. Also reformat
the xxxx_sym_fns vector to a standard format and add comments.
* coffread.c, mipsread.c, xcoffread.c, coffread.c, dbxread.c,
elfread.c (xxx_symfile_new_init, xxx_symfile_init, xxx_symfile_read):
Pass pointer to struct objfile rather than pointer to sym_fns.
Change references inside each function accordingly. Allocate any
symbol file specific info in the per-objfile memory region.
* dbxread.c (free_and_init_header_files): Break function into
free_header_files(), called from dbx_symfile_finish(), and
init_header_files(), called from dbx_new_init().
* dbxread.c (dbx_new_init): Move deallocation things to new
dbx_symfile_finish function.
* elfread.c (elf_new_init): Call buildsym_new_init().
* objfiles.c (free_objfile): Call the appropriate symfile_finish()
routine for the objfile before deallocating other stuff.
* sparc-tdep.c (get_longjmp_target): Cast target_read_memory arg.
* symfile.h: Move struct sym_fns to before struct objfile def.
Add sym_finish function pointer and change prototypes of other
function pointers to reflect passing struct objfile pointer rather
than struct sym_fns pointer.
* symfile.c: Remove now obsolete symtab_fns pointer.
* symfile.c (symfile_init): Renamed to find_sym_fns, and now only
locates the correct sym_fns struct for the given objfile.
* symfile.c (syms_from_objfile, symbol_file_add): Restructured
for better support of mapped symbol tables.
* symfile.c (symbol_file_command): Remove obsolete code using
symfile_fns.
* symfile.h: Remove duplicate declarations for symfile_objfile,
entry_point, and object_files.
* target.c (target_info): Compare symfile_objfile to NULL.
* xcoffread.c (aixcoff_new_init): Move deallocation stuff to
aixcoff_symfile_finish().
1992-03-19 22:57:15 +01:00
|
|
|
|
elf_symfile_finish, /* sym_finish: finished with file, cleanup */
|
1991-10-24 12:28:54 +01:00
|
|
|
|
NULL /* next: pointer to next struct sym_fns */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
void
|
1992-02-22 02:46:16 +01:00
|
|
|
|
_initialize_elfread ()
|
1991-10-24 12:28:54 +01:00
|
|
|
|
{
|
|
|
|
|
add_symtab_fns (&elf_sym_fns);
|
|
|
|
|
}
|