1999-05-03 09:29:11 +02:00
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/* bfdlink.h -- header file for BFD link routines
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2002-02-15 03:10:03 +01:00
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002
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2001-03-14 03:27:44 +01:00
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Free Software Foundation, Inc.
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1999-05-03 09:29:11 +02:00
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Written by Steve Chamberlain and Ian Lance Taylor, Cygnus Support.
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2002-06-07 16:56:01 +02:00
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This file is part of BFD, the Binary File Descriptor library.
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1999-05-03 09:29:11 +02:00
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2002-06-07 16:56:01 +02:00
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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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1999-05-03 09:29:11 +02:00
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2002-06-07 16:56:01 +02:00
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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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1999-05-03 09:29:11 +02:00
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2002-06-07 16:56:01 +02:00
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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1999-05-03 09:29:11 +02:00
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#ifndef BFDLINK_H
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#define BFDLINK_H
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/* Which symbols to strip during a link. */
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enum bfd_link_strip
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{
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strip_none, /* Don't strip any symbols. */
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strip_debugger, /* Strip debugging symbols. */
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strip_some, /* keep_hash is the list of symbols to keep. */
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strip_all /* Strip all symbols. */
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};
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/* Which local symbols to discard during a link. This is irrelevant
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if strip_all is used. */
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enum bfd_link_discard
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{
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2001-04-13 02:34:36 +02:00
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discard_sec_merge, /* Discard local temporary symbols in SEC_MERGE
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sections. */
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1999-05-03 09:29:11 +02:00
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discard_none, /* Don't discard any locals. */
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discard_l, /* Discard local temporary symbols. */
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discard_all /* Discard all locals. */
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};
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2001-08-24 18:36:04 +02:00
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/* Describes the type of hash table entry structure being used.
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Different hash table structure have different fields and so
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support different linking features. */
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enum bfd_link_hash_table_type
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{
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bfd_link_generic_hash_table,
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bfd_link_elf_hash_table
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};
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1999-05-03 09:29:11 +02:00
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/* These are the possible types of an entry in the BFD link hash
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table. */
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enum bfd_link_hash_type
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{
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bfd_link_hash_new, /* Symbol is new. */
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bfd_link_hash_undefined, /* Symbol seen before, but undefined. */
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bfd_link_hash_undefweak, /* Symbol is weak and undefined. */
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bfd_link_hash_defined, /* Symbol is defined. */
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bfd_link_hash_defweak, /* Symbol is weak and defined. */
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bfd_link_hash_common, /* Symbol is common. */
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bfd_link_hash_indirect, /* Symbol is an indirect link. */
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bfd_link_hash_warning /* Like indirect, but warn if referenced. */
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};
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2002-07-31 14:50:09 +02:00
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enum bfd_link_common_skip_ar_aymbols
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{
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bfd_link_common_skip_none,
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bfd_link_common_skip_text,
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bfd_link_common_skip_data,
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bfd_link_common_skip_all
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};
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1999-05-03 09:29:11 +02:00
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/* The linking routines use a hash table which uses this structure for
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its elements. */
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struct bfd_link_hash_entry
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{
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/* Base hash table entry structure. */
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struct bfd_hash_entry root;
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/* Type of this entry. */
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enum bfd_link_hash_type type;
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/* Undefined and common symbols are kept in a linked list through
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this field. This field is not in the union because that would
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force us to remove entries from the list when we changed their
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type, which would force the list to be doubly linked, which would
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waste more memory. When an undefined or common symbol is
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created, it should be added to this list, the head of which is in
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the link hash table itself. As symbols are defined, they need
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not be removed from the list; anything which reads the list must
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doublecheck the symbol type.
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Weak symbols are not kept on this list.
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Defined and defweak symbols use this field as a reference marker.
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If the field is not NULL, or this structure is the tail of the
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undefined symbol list, the symbol has been referenced. If the
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symbol is undefined and becomes defined, this field will
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automatically be non-NULL since the symbol will have been on the
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undefined symbol list. */
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struct bfd_link_hash_entry *next;
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/* A union of information depending upon the type. */
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union
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{
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/* Nothing is kept for bfd_hash_new. */
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/* bfd_link_hash_undefined, bfd_link_hash_undefweak. */
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struct
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{
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bfd *abfd; /* BFD symbol was found in. */
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} undef;
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/* bfd_link_hash_defined, bfd_link_hash_defweak. */
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struct
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{
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bfd_vma value; /* Symbol value. */
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asection *section; /* Symbol section. */
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} def;
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/* bfd_link_hash_indirect, bfd_link_hash_warning. */
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struct
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{
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struct bfd_link_hash_entry *link; /* Real symbol. */
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const char *warning; /* Warning (bfd_link_hash_warning only). */
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} i;
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/* bfd_link_hash_common. */
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struct
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{
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/* The linker needs to know three things about common
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2002-11-30 09:39:46 +01:00
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symbols: the size, the alignment, and the section in
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which the symbol should be placed. We store the size
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here, and we allocate a small structure to hold the
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section and the alignment. The alignment is stored as a
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power of two. We don't store all the information
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directly because we don't want to increase the size of
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the union; this structure is a major space user in the
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linker. */
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1999-05-03 09:29:11 +02:00
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bfd_size_type size; /* Common symbol size. */
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struct bfd_link_hash_common_entry
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{
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unsigned int alignment_power; /* Alignment. */
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asection *section; /* Symbol section. */
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} *p;
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} c;
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} u;
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};
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/* This is the link hash table. It is a derived class of
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bfd_hash_table. */
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struct bfd_link_hash_table
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{
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/* The hash table itself. */
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struct bfd_hash_table table;
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/* The back end which created this hash table. This indicates the
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type of the entries in the hash table, which is sometimes
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important information when linking object files of different
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types together. */
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const bfd_target *creator;
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/* A linked list of undefined and common symbols, linked through the
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next field in the bfd_link_hash_entry structure. */
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struct bfd_link_hash_entry *undefs;
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/* Entries are added to the tail of the undefs list. */
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struct bfd_link_hash_entry *undefs_tail;
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2001-08-24 18:36:04 +02:00
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/* The type of the ink hash table. */
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enum bfd_link_hash_table_type type;
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1999-05-03 09:29:11 +02:00
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};
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2002-11-30 09:39:46 +01:00
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/* Look up an entry in a link hash table. If FOLLOW is TRUE, this
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1999-05-03 09:29:11 +02:00
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follows bfd_link_hash_indirect and bfd_link_hash_warning links to
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the real symbol. */
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extern struct bfd_link_hash_entry *bfd_link_hash_lookup
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2002-11-30 09:39:46 +01:00
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PARAMS ((struct bfd_link_hash_table *, const char *, bfd_boolean create,
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bfd_boolean copy, bfd_boolean follow));
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1999-05-03 09:29:11 +02:00
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/* Look up an entry in the main linker hash table if the symbol might
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be wrapped. This should only be used for references to an
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undefined symbol, not for definitions of a symbol. */
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extern struct bfd_link_hash_entry *bfd_wrapped_link_hash_lookup
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2002-11-30 09:39:46 +01:00
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PARAMS ((bfd *, struct bfd_link_info *, const char *, bfd_boolean,
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bfd_boolean, bfd_boolean));
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1999-05-03 09:29:11 +02:00
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/* Traverse a link hash table. */
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extern void bfd_link_hash_traverse
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PARAMS ((struct bfd_link_hash_table *,
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2002-11-30 09:39:46 +01:00
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bfd_boolean (*) (struct bfd_link_hash_entry *, PTR),
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1999-05-03 09:29:11 +02:00
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PTR));
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/* Add an entry to the undefs list. */
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extern void bfd_link_add_undef
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PARAMS ((struct bfd_link_hash_table *, struct bfd_link_hash_entry *));
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2002-07-01 10:04:47 +02:00
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struct bfd_sym_chain
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{
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struct bfd_sym_chain *next;
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const char *name;
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};
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1999-05-03 09:29:11 +02:00
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/* This structure holds all the information needed to communicate
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between BFD and the linker when doing a link. */
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struct bfd_link_info
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{
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2002-12-20 00:05:39 +01:00
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/* TRUE if BFD should generate a relocatable object file. */
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unsigned int relocateable: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should generate relocation information in the final
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2002-07-01 10:04:47 +02:00
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executable. */
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2002-12-20 00:05:39 +01:00
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unsigned int emitrelocations: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should generate a "task linked" object file,
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2002-07-01 10:04:47 +02:00
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similar to relocatable but also with globals converted to
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statics. */
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2002-12-20 00:05:39 +01:00
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unsigned int task_link: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should generate a shared object. */
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2002-12-20 00:05:39 +01:00
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unsigned int shared: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should pre-bind symbols in a shared object. */
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2002-12-20 00:05:39 +01:00
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unsigned int symbolic: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should export all symbols in the dynamic symbol table
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2001-06-15 14:57:02 +02:00
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of an executable, rather than only those used. */
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2002-12-20 00:05:39 +01:00
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unsigned int export_dynamic: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if shared objects should be linked directly, not shared. */
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2002-12-20 00:05:39 +01:00
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unsigned int static_link: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if the output file should be in a traditional format. This
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1999-05-03 09:29:11 +02:00
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is equivalent to the setting of the BFD_TRADITIONAL_FORMAT flag
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on the output file, but may be checked when reading the input
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files. */
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2002-12-20 00:05:39 +01:00
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unsigned int traditional_format: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if we want to produced optimized output files. This might
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1999-05-03 09:29:11 +02:00
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need much more time and therefore must be explicitly selected. */
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2002-12-20 00:05:39 +01:00
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unsigned int optimize: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should generate errors for undefined symbols
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1999-05-03 09:29:11 +02:00
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even if generating a shared object. */
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2002-12-20 00:05:39 +01:00
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unsigned int no_undefined: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if BFD should allow undefined symbols in shared objects even
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2000-12-12 21:53:02 +01:00
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when no_undefined is set to disallow undefined symbols. The net
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result will be that undefined symbols in regular objects will
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still trigger an error, but undefined symbols in shared objects
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will be ignored. The implementation of no_undefined makes the
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assumption that the runtime linker will choke on undefined
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symbols. However there is at least one system (BeOS) where
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undefined symbols in shared libraries is normal since the kernel
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patches them at load time to select which function is most
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appropriate for the current architecture. I.E. dynamically
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select an appropriate memset function. Apparently it is also
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normal for HPPA shared libraries to have undefined symbols. */
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2002-12-20 00:05:39 +01:00
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unsigned int allow_shlib_undefined: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if ok to have multiple definition. */
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2002-12-20 00:05:39 +01:00
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unsigned int allow_multiple_definition: 1;
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2002-07-01 10:04:47 +02:00
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2002-11-30 09:39:46 +01:00
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/* TRUE if ok to have version with no definition. */
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2002-12-20 00:05:39 +01:00
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unsigned int allow_undefined_version: 1;
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/* TRUE if symbols should be retained in memory, FALSE if they
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should be freed and reread. */
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unsigned int keep_memory: 1;
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/* TRUE if every symbol should be reported back via the notice
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callback. */
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unsigned int notice_all: 1;
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/* TRUE if executable should not contain copy relocs.
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Setting this true may result in a non-sharable text segment. */
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|
unsigned int nocopyreloc: 1;
|
|
|
|
|
|
|
|
|
|
/* TRUE if the new ELF dynamic tags are enabled. */
|
|
|
|
|
unsigned int new_dtags: 1;
|
|
|
|
|
|
|
|
|
|
/* TRUE if non-PLT relocs should be merged into one reloc section
|
|
|
|
|
and sorted so that relocs against the same symbol come together. */
|
|
|
|
|
unsigned int combreloc: 1;
|
|
|
|
|
|
|
|
|
|
/* TRUE if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
|
|
|
|
|
should be created. */
|
|
|
|
|
unsigned int eh_frame_hdr: 1;
|
2002-08-08 05:50:18 +02:00
|
|
|
|
|
2002-12-23 12:53:12 +01:00
|
|
|
|
/* TRUE if global symbols in discarded sections should be stripped. */
|
|
|
|
|
unsigned int strip_discarded: 1;
|
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Which symbols to strip. */
|
|
|
|
|
enum bfd_link_strip strip;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Which local symbols to discard. */
|
|
|
|
|
enum bfd_link_discard discard;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
2002-12-20 00:05:39 +01:00
|
|
|
|
/* Criteria for skipping symbols when detemining
|
|
|
|
|
whether to include an object from an archive. */
|
|
|
|
|
enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
2002-12-20 00:05:39 +01:00
|
|
|
|
/* Function callbacks. */
|
|
|
|
|
const struct bfd_link_callbacks *callbacks;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Hash table handled by BFD. */
|
|
|
|
|
struct bfd_link_hash_table *hash;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Hash table of symbols to keep. This is NULL unless strip is
|
|
|
|
|
strip_some. */
|
|
|
|
|
struct bfd_hash_table *keep_hash;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Hash table of symbols to report back via the notice callback. If
|
2002-11-30 09:39:46 +01:00
|
|
|
|
this is NULL, and notice_all is FALSE, then no symbols are
|
1999-05-03 09:29:11 +02:00
|
|
|
|
reported back. */
|
|
|
|
|
struct bfd_hash_table *notice_hash;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Hash table of symbols which are being wrapped (the --wrap linker
|
|
|
|
|
option). If this is NULL, no symbols are being wrapped. */
|
|
|
|
|
struct bfd_hash_table *wrap_hash;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
2002-12-20 00:05:39 +01:00
|
|
|
|
/* The list of input BFD's involved in the link. These are chained
|
|
|
|
|
together via the link_next field. */
|
|
|
|
|
bfd *input_bfds;
|
|
|
|
|
|
|
|
|
|
/* If a symbol should be created for each input BFD, this is section
|
|
|
|
|
where those symbols should be placed. It must be a section in
|
|
|
|
|
the output BFD. It may be NULL, in which case no such symbols
|
|
|
|
|
will be created. This is to support CREATE_OBJECT_SYMBOLS in the
|
|
|
|
|
linker command language. */
|
|
|
|
|
asection *create_object_symbols_section;
|
|
|
|
|
|
|
|
|
|
/* List of global symbol names that are starting points for marking
|
|
|
|
|
sections against garbage collection. */
|
|
|
|
|
struct bfd_sym_chain *gc_sym_list;
|
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* If a base output file is wanted, then this points to it */
|
|
|
|
|
PTR base_file;
|
|
|
|
|
|
1999-06-23 13:03:45 +02:00
|
|
|
|
/* The function to call when the executable or shared object is
|
|
|
|
|
loaded. */
|
|
|
|
|
const char *init_function;
|
2002-07-01 10:04:47 +02:00
|
|
|
|
|
1999-06-23 13:03:45 +02:00
|
|
|
|
/* The function to call when the executable or shared object is
|
|
|
|
|
unloaded. */
|
|
|
|
|
const char *fini_function;
|
2000-07-20 05:23:03 +02:00
|
|
|
|
|
2002-12-20 00:05:39 +01:00
|
|
|
|
/* If non-zero, specifies that branches which are problematic for the
|
|
|
|
|
MPC860 C0 (or earlier) should be checked for and modified. It gives the
|
|
|
|
|
number of bytes that should be checked at the end of each text page. */
|
|
|
|
|
int mpc860c0;
|
2001-08-03 01:07:10 +02:00
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
|
/* Non-zero if auto-import thunks for DATA items in pei386 DLLs
|
2002-06-07 16:56:01 +02:00
|
|
|
|
should be generated/linked against. Set to 1 if this feature
|
|
|
|
|
is explicitly requested by the user, -1 if enabled by default. */
|
|
|
|
|
int pei386_auto_import;
|
2001-08-23 17:14:18 +02:00
|
|
|
|
|
2002-11-14 19:03:17 +01:00
|
|
|
|
/* Non-zero if runtime relocs for DATA items with non-zero addends
|
|
|
|
|
in pei386 DLLs should be generated. Set to 1 if this feature
|
|
|
|
|
is explicitly requested by the user, -1 if enabled by default. */
|
|
|
|
|
int pei386_runtime_pseudo_reloc;
|
|
|
|
|
|
2001-08-23 17:14:18 +02:00
|
|
|
|
/* How many spare .dynamic DT_NULL entries should be added? */
|
2001-08-25 11:48:13 +02:00
|
|
|
|
unsigned int spare_dynamic_tags;
|
2002-07-31 14:50:09 +02:00
|
|
|
|
|
2002-12-20 00:05:39 +01:00
|
|
|
|
/* May be used to set DT_FLAGS for ELF. */
|
|
|
|
|
bfd_vma flags;
|
|
|
|
|
|
|
|
|
|
/* May be used to set DT_FLAGS_1 for ELF. */
|
|
|
|
|
bfd_vma flags_1;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* This structures holds a set of callback functions. These are
|
|
|
|
|
called by the BFD linker routines. The first argument to each
|
|
|
|
|
callback function is the bfd_link_info structure being used. Each
|
2002-11-30 09:39:46 +01:00
|
|
|
|
function returns a boolean value. If the function returns FALSE,
|
1999-05-03 09:29:11 +02:00
|
|
|
|
then the BFD function which called it will return with a failure
|
|
|
|
|
indication. */
|
|
|
|
|
|
|
|
|
|
struct bfd_link_callbacks
|
|
|
|
|
{
|
|
|
|
|
/* A function which is called when an object is added from an
|
|
|
|
|
archive. ABFD is the archive element being added. NAME is the
|
|
|
|
|
name of the symbol which caused the archive element to be pulled
|
|
|
|
|
in. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*add_archive_element)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, bfd *abfd, const char *name));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a symbol is found with multiple
|
|
|
|
|
definitions. NAME is the symbol which is defined multiple times.
|
|
|
|
|
OBFD is the old BFD, OSEC is the old section, OVAL is the old
|
|
|
|
|
value, NBFD is the new BFD, NSEC is the new section, and NVAL is
|
|
|
|
|
the new value. OBFD may be NULL. OSEC and NSEC may be
|
|
|
|
|
bfd_com_section or bfd_ind_section. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*multiple_definition)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name,
|
|
|
|
|
bfd *obfd, asection *osec, bfd_vma oval,
|
|
|
|
|
bfd *nbfd, asection *nsec, bfd_vma nval));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a common symbol is defined
|
|
|
|
|
multiple times. NAME is the symbol appearing multiple times.
|
|
|
|
|
OBFD is the BFD of the existing symbol; it may be NULL if this is
|
|
|
|
|
not known. OTYPE is the type of the existing symbol, which may
|
|
|
|
|
be bfd_link_hash_defined, bfd_link_hash_defweak,
|
|
|
|
|
bfd_link_hash_common, or bfd_link_hash_indirect. If OTYPE is
|
|
|
|
|
bfd_link_hash_common, OSIZE is the size of the existing symbol.
|
|
|
|
|
NBFD is the BFD of the new symbol. NTYPE is the type of the new
|
|
|
|
|
symbol, one of bfd_link_hash_defined, bfd_link_hash_common, or
|
|
|
|
|
bfd_link_hash_indirect. If NTYPE is bfd_link_hash_common, NSIZE
|
|
|
|
|
is the size of the new symbol. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*multiple_common)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name,
|
|
|
|
|
bfd *obfd, enum bfd_link_hash_type otype, bfd_vma osize,
|
|
|
|
|
bfd *nbfd, enum bfd_link_hash_type ntype, bfd_vma nsize));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called to add a symbol to a set. ENTRY is
|
|
|
|
|
the link hash table entry for the set itself (e.g.,
|
|
|
|
|
__CTOR_LIST__). RELOC is the relocation to use for an entry in
|
|
|
|
|
the set when generating a relocateable file, and is also used to
|
|
|
|
|
get the size of the entry when generating an executable file.
|
|
|
|
|
ABFD, SEC and VALUE identify the value to add to the set. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*add_to_set)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, struct bfd_link_hash_entry *entry,
|
|
|
|
|
bfd_reloc_code_real_type reloc, bfd *abfd, asection *sec,
|
|
|
|
|
bfd_vma value));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when the name of a g++ constructor or
|
|
|
|
|
destructor is found. This is only called by some object file
|
2002-11-30 09:39:46 +01:00
|
|
|
|
formats. CONSTRUCTOR is TRUE for a constructor, FALSE for a
|
1999-05-03 09:29:11 +02:00
|
|
|
|
destructor. This will use BFD_RELOC_CTOR when generating a
|
|
|
|
|
relocateable file. NAME is the name of the symbol found. ABFD,
|
|
|
|
|
SECTION and VALUE are the value of the symbol. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*constructor)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, bfd_boolean constructor,
|
|
|
|
|
const char *name, bfd *abfd, asection *sec, bfd_vma value));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called to issue a linker warning. For
|
|
|
|
|
example, this is called when there is a reference to a warning
|
|
|
|
|
symbol. WARNING is the warning to be issued. SYMBOL is the name
|
|
|
|
|
of the symbol which triggered the warning; it may be NULL if
|
|
|
|
|
there is none. ABFD, SECTION and ADDRESS identify the location
|
|
|
|
|
which trigerred the warning; either ABFD or SECTION or both may
|
|
|
|
|
be NULL if the location is not known. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*warning)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *warning, const char *symbol,
|
|
|
|
|
bfd *abfd, asection *section, bfd_vma address));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a relocation is attempted against
|
|
|
|
|
an undefined symbol. NAME is the symbol which is undefined.
|
|
|
|
|
ABFD, SECTION and ADDRESS identify the location from which the
|
2000-03-01 20:38:01 +01:00
|
|
|
|
reference is made. FATAL indicates whether an undefined symbol is
|
|
|
|
|
a fatal error or not. In some cases SECTION may be NULL. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*undefined_symbol)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name, bfd *abfd,
|
|
|
|
|
asection *section, bfd_vma address, bfd_boolean fatal));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a reloc overflow occurs. NAME is
|
|
|
|
|
the name of the symbol or section the reloc is against,
|
|
|
|
|
RELOC_NAME is the name of the relocation, and ADDEND is any
|
|
|
|
|
addend that is used. ABFD, SECTION and ADDRESS identify the
|
|
|
|
|
location at which the overflow occurs; if this is the result of a
|
|
|
|
|
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
|
|
|
|
|
ABFD will be NULL. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*reloc_overflow)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name, const char *reloc_name,
|
|
|
|
|
bfd_vma addend, bfd *abfd, asection *section, bfd_vma address));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a dangerous reloc is performed.
|
|
|
|
|
The canonical example is an a29k IHCONST reloc which does not
|
|
|
|
|
follow an IHIHALF reloc. MESSAGE is an appropriate message.
|
|
|
|
|
ABFD, SECTION and ADDRESS identify the location at which the
|
|
|
|
|
problem occurred; if this is the result of a
|
|
|
|
|
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
|
|
|
|
|
ABFD will be NULL. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*reloc_dangerous)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *message,
|
|
|
|
|
bfd *abfd, asection *section, bfd_vma address));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a reloc is found to be attached
|
|
|
|
|
to a symbol which is not being written out. NAME is the name of
|
|
|
|
|
the symbol. ABFD, SECTION and ADDRESS identify the location of
|
|
|
|
|
the reloc; if this is the result of a
|
|
|
|
|
bfd_section_reloc_link_order or bfd_symbol_reloc_link_order, then
|
|
|
|
|
ABFD will be NULL. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*unattached_reloc)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name,
|
|
|
|
|
bfd *abfd, asection *section, bfd_vma address));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* A function which is called when a symbol in notice_hash is
|
|
|
|
|
defined or referenced. NAME is the symbol. ABFD, SECTION and
|
|
|
|
|
ADDRESS are the value of the symbol. If SECTION is
|
|
|
|
|
bfd_und_section, this is a reference. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_boolean (*notice)
|
|
|
|
|
PARAMS ((struct bfd_link_info *, const char *name,
|
|
|
|
|
bfd *abfd, asection *section, bfd_vma address));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* The linker builds link_order structures which tell the code how to
|
|
|
|
|
include input data in the output file. */
|
|
|
|
|
|
|
|
|
|
/* These are the types of link_order structures. */
|
|
|
|
|
|
|
|
|
|
enum bfd_link_order_type
|
|
|
|
|
{
|
|
|
|
|
bfd_undefined_link_order, /* Undefined. */
|
|
|
|
|
bfd_indirect_link_order, /* Built from a section. */
|
|
|
|
|
bfd_data_link_order, /* Set to explicit data. */
|
|
|
|
|
bfd_section_reloc_link_order, /* Relocate against a section. */
|
|
|
|
|
bfd_symbol_reloc_link_order /* Relocate against a symbol. */
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* This is the link_order structure itself. These form a chain
|
|
|
|
|
attached to the section whose contents they are describing. */
|
|
|
|
|
|
2002-11-30 09:39:46 +01:00
|
|
|
|
struct bfd_link_order
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
|
|
|
|
/* Next link_order in chain. */
|
|
|
|
|
struct bfd_link_order *next;
|
|
|
|
|
/* Type of link_order. */
|
|
|
|
|
enum bfd_link_order_type type;
|
|
|
|
|
/* Offset within output section. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
bfd_vma offset;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
/* Size within output section. */
|
|
|
|
|
bfd_size_type size;
|
|
|
|
|
/* Type specific information. */
|
2002-11-30 09:39:46 +01:00
|
|
|
|
union
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
2002-11-30 09:39:46 +01:00
|
|
|
|
struct
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
|
|
|
|
/* Section to include. If this is used, then
|
|
|
|
|
section->output_section must be the section the
|
|
|
|
|
link_order is attached to, section->output_offset must
|
|
|
|
|
equal the link_order offset field, and section->_raw_size
|
|
|
|
|
must equal the link_order size field. Maybe these
|
|
|
|
|
restrictions should be relaxed someday. */
|
|
|
|
|
asection *section;
|
|
|
|
|
} indirect;
|
|
|
|
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struct
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{
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2002-02-15 03:10:03 +01:00
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/* Size of contents, or zero when contents size == size
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within output section.
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A non-zero value allows filling of the output section
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with an arbitrary repeated pattern. */
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unsigned int size;
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/* Data to put into file. */
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1999-05-03 09:29:11 +02:00
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bfd_byte *contents;
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} data;
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struct
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{
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/* Description of reloc to generate. Used for
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bfd_section_reloc_link_order and
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bfd_symbol_reloc_link_order. */
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struct bfd_link_order_reloc *p;
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} reloc;
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} u;
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};
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/* A linker order of type bfd_section_reloc_link_order or
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bfd_symbol_reloc_link_order means to create a reloc against a
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section or symbol, respectively. This is used to implement -Ur to
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generate relocs for the constructor tables. The
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bfd_link_order_reloc structure describes the reloc that BFD should
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create. It is similar to a arelent, but I didn't use arelent
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because the linker does not know anything about most symbols, and
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any asymbol structure it creates will be partially meaningless.
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This information could logically be in the bfd_link_order struct,
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but I didn't want to waste the space since these types of relocs
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are relatively rare. */
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struct bfd_link_order_reloc
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{
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/* Reloc type. */
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bfd_reloc_code_real_type reloc;
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union
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{
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/* For type bfd_section_reloc_link_order, this is the section
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the reloc should be against. This must be a section in the
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output BFD, not any of the input BFDs. */
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asection *section;
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/* For type bfd_symbol_reloc_link_order, this is the name of the
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symbol the reloc should be against. */
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const char *name;
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} u;
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/* Addend to use. The object file should contain zero. The BFD
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backend is responsible for filling in the contents of the object
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file correctly. For some object file formats (e.g., COFF) the
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addend must be stored into in the object file, and for some
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(e.g., SPARC a.out) it is kept in the reloc. */
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bfd_vma addend;
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};
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/* Allocate a new link_order for a section. */
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extern struct bfd_link_order *bfd_new_link_order PARAMS ((bfd *, asection *));
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/* These structures are used to describe version information for the
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ELF linker. These structures could be manipulated entirely inside
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BFD, but it would be a pain. Instead, the regular linker sets up
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these structures, and then passes them into BFD. */
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/* Regular expressions for a version. */
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struct bfd_elf_version_expr
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{
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/* Next regular expression for this version. */
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struct bfd_elf_version_expr *next;
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/* Regular expression. */
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const char *pattern;
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/* Matching function. */
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2002-11-30 09:39:46 +01:00
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int (*match) PARAMS ((struct bfd_elf_version_expr *, const char *));
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2002-08-08 05:50:18 +02:00
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/* Defined by ".symver". */
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unsigned int symver: 1;
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/* Defined by version script. */
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unsigned int script : 1;
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1999-05-03 09:29:11 +02:00
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};
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/* Version dependencies. */
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struct bfd_elf_version_deps
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{
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/* Next dependency for this version. */
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struct bfd_elf_version_deps *next;
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/* The version which this version depends upon. */
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struct bfd_elf_version_tree *version_needed;
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};
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/* A node in the version tree. */
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struct bfd_elf_version_tree
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{
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/* Next version. */
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struct bfd_elf_version_tree *next;
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/* Name of this version. */
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const char *name;
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/* Version number. */
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unsigned int vernum;
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/* Regular expressions for global symbols in this version. */
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struct bfd_elf_version_expr *globals;
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/* Regular expressions for local symbols in this version. */
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struct bfd_elf_version_expr *locals;
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/* List of versions which this version depends upon. */
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struct bfd_elf_version_deps *deps;
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/* Index of the version name. This is used within BFD. */
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unsigned int name_indx;
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/* Whether this version tree was used. This is used within BFD. */
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int used;
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};
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#endif
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