| 1 | /* genlink.h -- interface to the BFD generic linker |
| 2 | Copyright 1993, 1994, 1996, 2002, 2005, 2007 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of BFD, the Binary File Descriptor library. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #ifndef GENLINK_H |
| 23 | #define GENLINK_H |
| 24 | |
| 25 | /* This header file is internal to BFD. It describes the internal |
| 26 | structures and functions used by the BFD generic linker, in case |
| 27 | any of the more specific linkers want to use or call them. Note |
| 28 | that some functions, such as _bfd_generic_link_hash_table_create, |
| 29 | are declared in libbfd.h, because they are expected to be widely |
| 30 | used. The functions and structures in this file will probably only |
| 31 | be used by a few files besides linker.c itself. In fact, this file |
| 32 | is not particularly complete; I have only put in the interfaces I |
| 33 | actually needed. */ |
| 34 | |
| 35 | /* The generic linker uses a hash table which is a derived class of |
| 36 | the standard linker hash table, just as the other backend specific |
| 37 | linkers do. Do not confuse the generic linker hash table with the |
| 38 | standard BFD linker hash table it is built upon. */ |
| 39 | |
| 40 | /* Generic linker hash table entries. */ |
| 41 | |
| 42 | struct generic_link_hash_entry |
| 43 | { |
| 44 | struct bfd_link_hash_entry root; |
| 45 | /* Whether this symbol has been written out. */ |
| 46 | bfd_boolean written; |
| 47 | /* Symbol from input BFD. */ |
| 48 | asymbol *sym; |
| 49 | }; |
| 50 | |
| 51 | /* Generic linker hash table. */ |
| 52 | |
| 53 | struct generic_link_hash_table |
| 54 | { |
| 55 | struct bfd_link_hash_table root; |
| 56 | }; |
| 57 | |
| 58 | /* Look up an entry in a generic link hash table. */ |
| 59 | |
| 60 | #define _bfd_generic_link_hash_lookup(table, string, create, copy, follow) \ |
| 61 | ((struct generic_link_hash_entry *) \ |
| 62 | bfd_link_hash_lookup (&(table)->root, (string), (create), (copy), (follow))) |
| 63 | |
| 64 | /* Traverse a generic link hash table. */ |
| 65 | |
| 66 | #define _bfd_generic_link_hash_traverse(table, func, info) \ |
| 67 | (bfd_link_hash_traverse \ |
| 68 | (&(table)->root, \ |
| 69 | (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \ |
| 70 | (info))) |
| 71 | |
| 72 | /* Get the generic link hash table from the info structure. This is |
| 73 | just a cast. */ |
| 74 | |
| 75 | #define _bfd_generic_hash_table(p) \ |
| 76 | ((struct generic_link_hash_table *) ((p)->hash)) |
| 77 | |
| 78 | /* The generic linker reads in the asymbol structures for an input BFD |
| 79 | and keeps them in the outsymbol and symcount fields. */ |
| 80 | |
| 81 | #define _bfd_generic_link_get_symbols(abfd) ((abfd)->outsymbols) |
| 82 | #define _bfd_generic_link_get_symcount(abfd) ((abfd)->symcount) |
| 83 | |
| 84 | /* Add the symbols of input_bfd to the symbols being built for |
| 85 | output_bfd. */ |
| 86 | extern bfd_boolean _bfd_generic_link_output_symbols |
| 87 | (bfd *, bfd *, struct bfd_link_info *, size_t *); |
| 88 | |
| 89 | /* This structure is used to pass information to |
| 90 | _bfd_generic_link_write_global_symbol, which may be called via |
| 91 | _bfd_generic_link_hash_traverse. */ |
| 92 | |
| 93 | struct generic_write_global_symbol_info |
| 94 | { |
| 95 | struct bfd_link_info *info; |
| 96 | bfd *output_bfd; |
| 97 | size_t *psymalloc; |
| 98 | }; |
| 99 | |
| 100 | /* Write out a single global symbol. This is expected to be called |
| 101 | via _bfd_generic_link_hash_traverse. The second argument must |
| 102 | actually be a struct generic_write_global_symbol_info *. */ |
| 103 | extern bfd_boolean _bfd_generic_link_write_global_symbol |
| 104 | (struct generic_link_hash_entry *, void *); |
| 105 | |
| 106 | /* Generic link hash table entry creation routine. */ |
| 107 | struct bfd_hash_entry *_bfd_generic_link_hash_newfunc |
| 108 | (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); |
| 109 | |
| 110 | #endif |