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
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. */
35 #if defined(__GNUC__) && !defined(C_ALLOCA)
37 # define alloca __builtin_alloca
39 # if defined(HAVE_ALLOCA_H) && !defined(C_ALLOCA)
42 # ifndef alloca /* predefined by HP cc +Olibcalls */
43 # if !defined (__STDC__) && !defined (__hpux)
47 # endif /* __STDC__, __hpux */
49 # endif /* HAVE_ALLOCA_H */
55 /* The Solaris version of locale.h always includes libintl.h. If we have
56 been configured with --disable-nls then ENABLE_NLS will not be defined
57 and the dummy definitions of bindtextdomain (et al) below will conflict
58 with the defintions in libintl.h. So we define these values to prevent
59 the bogus inclusion of libintl.h. */
61 # define _LIBGETTEXT_H
68 # define _(String) gettext (String)
70 # define N_(String) gettext_noop (String)
72 # define N_(String) (String)
75 # define gettext(Msgid) (Msgid)
76 # define dgettext(Domainname, Msgid) (Msgid)
77 # define dcgettext(Domainname, Msgid, Category) (Msgid)
78 # define textdomain(Domainname) while (0) /* nothing */
79 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
80 # define _(String) (String)
81 # define N_(String) (String)
84 /* Look in this environment name for the linker to pretend to be */
85 #define EMULATION_ENVIRON "LDEMULATION"
86 /* If in there look for the strings: */
88 /* Look in this variable for a target format */
89 #define TARGET_ENVIRON "GNUTARGET"
91 /* Input sections which are put in a section of this name are actually
93 #define DISCARD_SECTION_NAME "/DISCARD/"
95 /* A file name list */
96 typedef struct name_list {
98 struct name_list *next;
102 /* A wildcard specification. */
105 none, by_name, by_alignment, by_name_alignment, by_alignment_name
108 extern sort_type sort_section;
110 struct wildcard_spec {
112 struct name_list *exclude_name_list;
116 struct wildcard_list {
117 struct wildcard_list *next;
118 struct wildcard_spec spec;
121 struct map_symbol_def {
122 struct bfd_link_hash_entry *entry;
123 struct map_symbol_def *next;
126 /* The initial part of fat_user_section_struct has to be idential with
127 lean_user_section_struct. */
128 typedef struct fat_user_section_struct {
129 /* For input sections, when writing a map file: head / tail of a linked
130 list of hash table entries for symbols defined in this section. */
131 struct map_symbol_def *map_symbol_def_head;
132 struct map_symbol_def **map_symbol_def_tail;
133 } fat_section_userdata_type;
135 #define get_userdata(x) ((x)->userdata)
137 #define BYTE_SIZE (1)
138 #define SHORT_SIZE (2)
139 #define LONG_SIZE (4)
140 #define QUAD_SIZE (8)
143 /* 1 => assign space to common symbols even if `relocatable_output'. */
144 bfd_boolean force_common_definition;
146 /* 1 => do not assign addresses to common symbols. */
147 bfd_boolean inhibit_common_definition;
150 /* If TRUE, build MIPS embedded PIC relocation tables in the output
152 bfd_boolean embedded_relocs;
154 /* If TRUE, force generation of a file with a .exe file. */
155 bfd_boolean force_exe_suffix;
157 /* If TRUE, generate a cross reference report. */
160 /* If TRUE (which is the default), warn about mismatched input
162 bfd_boolean warn_mismatch;
164 /* Warn on attempting to open an incompatible library during a library
166 bfd_boolean warn_search_mismatch;
169 /* If TRUE (the default) check section addresses, once compute,
171 bfd_boolean check_section_addresses;
173 /* If TRUE allow the linking of input files in an unknown architecture
174 assuming that the user knows what they are doing. This was the old
175 behaviour of the linker. The new default behaviour is to reject such
177 bfd_boolean accept_unknown_input_arch;
179 /* Big or little endian as set on command line. */
180 enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
182 /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */
190 /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo
191 and --dynamic-list FILE, as set on command line. */
194 dynamic_list_unset = 0,
199 /* Name of runtime interpreter to invoke. */
202 /* Name to give runtime libary from the -soname argument. */
205 /* Runtime library search path from the -rpath argument. */
208 /* Link time runtime library search path from the -rpath-link
212 /* Name of shared object whose symbol table should be filtered with
213 this shared object. From the --filter option. */
216 /* Name of shared object for whose symbol table this shared object
217 is an auxiliary filter. From the --auxiliary option. */
218 char **auxiliary_filters;
220 /* A version symbol to be applied to the symbol names found in the
221 .exports sections. */
222 char *version_exports_section;
224 /* Default linker script. */
225 char *default_script;
228 extern args_type command_line;
230 typedef int token_code_type;
233 bfd_boolean magic_demand_paged;
234 bfd_boolean make_executable;
236 /* If TRUE, doing a dynamic link. */
237 bfd_boolean dynamic_link;
239 /* If TRUE, -shared is supported. */
240 /* ??? A better way to do this is perhaps to define this in the
241 ld_emulation_xfer_struct since this is really a target dependent
243 bfd_boolean has_shared;
245 /* If TRUE, build constructors. */
246 bfd_boolean build_constructors;
248 /* If TRUE, warn about any constructors. */
249 bfd_boolean warn_constructors;
251 /* If TRUE, warn about merging common symbols with others. */
252 bfd_boolean warn_common;
254 /* If TRUE, only warn once about a particular undefined symbol. */
255 bfd_boolean warn_once;
257 /* If TRUE, warn if multiple global-pointers are needed (Alpha
259 bfd_boolean warn_multiple_gp;
261 /* If TRUE, warn if the starting address of an output section
262 changes due to the alignment of an input section. */
263 bfd_boolean warn_section_align;
265 /* If TRUE, warning messages are fatal */
266 bfd_boolean fatal_warnings;
268 bfd_boolean sort_common;
270 bfd_boolean text_read_only;
274 /* If set, orphan input sections will be mapped to separate output
276 bfd_boolean unique_orphan_sections;
278 /* If set, only search library directories explicitly selected
279 on the command line. */
280 bfd_boolean only_cmd_line_lib_dirs;
282 /* The rpath separation character. Usually ':'. */
283 char rpath_separator;
288 unsigned int split_by_reloc;
289 bfd_size_type split_by_file;
291 bfd_size_type specified_data_size;
293 /* The size of the hash table to use. */
294 bfd_size_type hash_table_size;
296 /* The maximum page size for ELF. */
299 /* The common page size for ELF. */
300 bfd_vma commonpagesize;
303 extern ld_config_type config;
305 extern FILE * saved_script_handle;
306 extern bfd_boolean force_make_executable;
308 /* Non-zero if we are processing a --defsym from the command line. */
309 extern int parsing_defsym;
311 extern int yyparse (void);
312 extern void add_cref (const char *, bfd *, asection *, bfd_vma);
313 extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action);
314 extern void output_cref (FILE *);
315 extern void check_nocrossrefs (void);
316 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
318 /* If gcc >= 2.6, we can give a function name, too. */
319 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
320 #define __PRETTY_FUNCTION__ NULL
324 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)