2009-06-10 Philip Blundell <philb@gnu.org>
[binutils.git] / ld / ld.h
blob018c08092ab13a0329393d6ec5eb533bed22bc22
1 /* ld.h -- general linker header file
2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 Free Software Foundation, Inc.
6 This file is part of the GNU Binutils.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
23 #ifndef LD_H
24 #define LD_H
26 #ifdef HAVE_LOCALE_H
27 #endif
28 #ifndef SEEK_CUR
29 #define SEEK_CUR 1
30 #endif
31 #ifndef SEEK_END
32 #define SEEK_END 2
33 #endif
35 #ifdef HAVE_LOCALE_H
36 # ifndef ENABLE_NLS
37 /* The Solaris version of locale.h always includes libintl.h. If we have
38 been configured with --disable-nls then ENABLE_NLS will not be defined
39 and the dummy definitions of bindtextdomain (et al) below will conflict
40 with the defintions in libintl.h. So we define these values to prevent
41 the bogus inclusion of libintl.h. */
42 # define _LIBINTL_H
43 # define _LIBGETTEXT_H
44 # endif
45 # include <locale.h>
46 #endif
48 #ifdef ENABLE_NLS
49 # include <libintl.h>
50 # define _(String) gettext (String)
51 # ifdef gettext_noop
52 # define N_(String) gettext_noop (String)
53 # else
54 # define N_(String) (String)
55 # endif
56 #else
57 # define gettext(Msgid) (Msgid)
58 # define dgettext(Domainname, Msgid) (Msgid)
59 # define dcgettext(Domainname, Msgid, Category) (Msgid)
60 # define textdomain(Domainname) while (0) /* nothing */
61 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
62 # define _(String) (String)
63 # define N_(String) (String)
64 #endif
66 /* Look in this environment name for the linker to pretend to be */
67 #define EMULATION_ENVIRON "LDEMULATION"
68 /* If in there look for the strings: */
70 /* Look in this variable for a target format */
71 #define TARGET_ENVIRON "GNUTARGET"
73 /* Input sections which are put in a section of this name are actually
74 discarded. */
75 #define DISCARD_SECTION_NAME "/DISCARD/"
77 /* A file name list */
78 typedef struct name_list {
79 const char *name;
80 struct name_list *next;
82 name_list;
84 typedef enum {sort_none, sort_ascending, sort_descending} sort_order;
86 /* A wildcard specification. */
88 typedef enum {
89 none, by_name, by_alignment, by_name_alignment, by_alignment_name
90 } sort_type;
92 extern sort_type sort_section;
94 struct wildcard_spec {
95 const char *name;
96 struct name_list *exclude_name_list;
97 sort_type sorted;
100 struct wildcard_list {
101 struct wildcard_list *next;
102 struct wildcard_spec spec;
105 struct map_symbol_def {
106 struct bfd_link_hash_entry *entry;
107 struct map_symbol_def *next;
110 /* The initial part of fat_user_section_struct has to be idential with
111 lean_user_section_struct. */
112 typedef struct fat_user_section_struct {
113 /* For input sections, when writing a map file: head / tail of a linked
114 list of hash table entries for symbols defined in this section. */
115 struct map_symbol_def *map_symbol_def_head;
116 struct map_symbol_def **map_symbol_def_tail;
117 } fat_section_userdata_type;
119 #define get_userdata(x) ((x)->userdata)
121 #define BYTE_SIZE (1)
122 #define SHORT_SIZE (2)
123 #define LONG_SIZE (4)
124 #define QUAD_SIZE (8)
126 typedef struct {
127 /* 1 => assign space to common symbols even if `relocatable_output'. */
128 bfd_boolean force_common_definition;
130 /* 1 => do not assign addresses to common symbols. */
131 bfd_boolean inhibit_common_definition;
132 bfd_boolean relax;
134 /* If TRUE, build MIPS embedded PIC relocation tables in the output
135 file. */
136 bfd_boolean embedded_relocs;
138 /* If TRUE, force generation of a file with a .exe file. */
139 bfd_boolean force_exe_suffix;
141 /* If TRUE, generate a cross reference report. */
142 bfd_boolean cref;
144 /* If TRUE (which is the default), warn about mismatched input
145 files. */
146 bfd_boolean warn_mismatch;
148 /* Warn on attempting to open an incompatible library during a library
149 search. */
150 bfd_boolean warn_search_mismatch;
152 /* If non-zero check section addresses, once computed,
153 for overlaps. Relocatable links only check when this is > 0. */
154 signed char check_section_addresses;
156 /* If TRUE allow the linking of input files in an unknown architecture
157 assuming that the user knows what they are doing. This was the old
158 behaviour of the linker. The new default behaviour is to reject such
159 input files. */
160 bfd_boolean accept_unknown_input_arch;
162 /* Big or little endian as set on command line. */
163 enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
165 /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */
166 enum
168 symbolic_unset = 0,
169 symbolic,
170 symbolic_functions,
171 } symbolic;
173 /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo
174 and --dynamic-list FILE, as set on command line. */
175 enum
177 dynamic_list_unset = 0,
178 dynamic_list_data,
179 dynamic_list
180 } dynamic_list;
182 /* Name of runtime interpreter to invoke. */
183 char *interpreter;
185 /* Name to give runtime libary from the -soname argument. */
186 char *soname;
188 /* Runtime library search path from the -rpath argument. */
189 char *rpath;
191 /* Link time runtime library search path from the -rpath-link
192 argument. */
193 char *rpath_link;
195 /* Name of shared object whose symbol table should be filtered with
196 this shared object. From the --filter option. */
197 char *filter_shlib;
199 /* Name of shared object for whose symbol table this shared object
200 is an auxiliary filter. From the --auxiliary option. */
201 char **auxiliary_filters;
203 /* A version symbol to be applied to the symbol names found in the
204 .exports sections. */
205 char *version_exports_section;
207 /* Default linker script. */
208 char *default_script;
209 } args_type;
211 extern args_type command_line;
213 typedef int token_code_type;
215 typedef struct {
216 bfd_boolean magic_demand_paged;
217 bfd_boolean make_executable;
219 /* If TRUE, doing a dynamic link. */
220 bfd_boolean dynamic_link;
222 /* If TRUE, -shared is supported. */
223 /* ??? A better way to do this is perhaps to define this in the
224 ld_emulation_xfer_struct since this is really a target dependent
225 parameter. */
226 bfd_boolean has_shared;
228 /* If TRUE, build constructors. */
229 bfd_boolean build_constructors;
231 /* If TRUE, warn about any constructors. */
232 bfd_boolean warn_constructors;
234 /* If TRUE, warn about merging common symbols with others. */
235 bfd_boolean warn_common;
237 /* If TRUE, only warn once about a particular undefined symbol. */
238 bfd_boolean warn_once;
240 /* If TRUE, warn if multiple global-pointers are needed (Alpha
241 only). */
242 bfd_boolean warn_multiple_gp;
244 /* If TRUE, warn if the starting address of an output section
245 changes due to the alignment of an input section. */
246 bfd_boolean warn_section_align;
248 /* If TRUE, warning messages are fatal */
249 bfd_boolean fatal_warnings;
251 sort_order sort_common;
253 bfd_boolean text_read_only;
255 bfd_boolean stats;
257 /* If set, orphan input sections will be mapped to separate output
258 sections. */
259 bfd_boolean unique_orphan_sections;
261 /* If set, only search library directories explicitly selected
262 on the command line. */
263 bfd_boolean only_cmd_line_lib_dirs;
265 /* The rpath separation character. Usually ':'. */
266 char rpath_separator;
268 char *map_filename;
269 FILE *map_file;
271 unsigned int split_by_reloc;
272 bfd_size_type split_by_file;
274 bfd_size_type specified_data_size;
276 /* The size of the hash table to use. */
277 bfd_size_type hash_table_size;
279 /* The maximum page size for ELF. */
280 bfd_vma maxpagesize;
282 /* The common page size for ELF. */
283 bfd_vma commonpagesize;
284 } ld_config_type;
286 extern ld_config_type config;
288 extern FILE * saved_script_handle;
289 extern bfd_boolean force_make_executable;
291 /* Non-zero if we are processing a --defsym from the command line. */
292 extern int parsing_defsym;
294 extern int yyparse (void);
295 extern void add_cref (const char *, bfd *, asection *, bfd_vma);
296 extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action);
297 extern void output_cref (FILE *);
298 extern void check_nocrossrefs (void);
299 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
301 /* If gcc >= 2.6, we can give a function name, too. */
302 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
303 #define __PRETTY_FUNCTION__ NULL
304 #endif
306 #undef abort
307 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
309 #endif