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.
5
6   This file is part of GLD, the Gnu Linker.
7
8   GLD 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 2, or (at your option)
11   any later version.
12
13   GLD 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.
17
18   You should have received a copy of the GNU General Public License
19   along with GLD; see the file COPYING.  If not, write to the Free
20   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21   02110-1301, USA.  */
22
23#ifndef LD_H
24#define LD_H
25
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
34
35#if defined(__GNUC__) && !defined(C_ALLOCA)
36# undef alloca
37# define alloca __builtin_alloca
38#else
39# if defined(HAVE_ALLOCA_H) && !defined(C_ALLOCA)
40#  include <alloca.h>
41# else
42#  ifndef alloca /* predefined by HP cc +Olibcalls */
43#   if !defined (__STDC__) && !defined (__hpux)
44char *alloca ();
45#   else
46void *alloca ();
47#   endif /* __STDC__, __hpux */
48#  endif /* alloca */
49# endif /* HAVE_ALLOCA_H */
50#endif
51
52
53#ifdef HAVE_LOCALE_H
54# ifndef ENABLE_NLS
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.  */
60#  define _LIBINTL_H
61#  define _LIBGETTEXT_H
62# endif
63# include <locale.h>
64#endif
65
66#ifdef ENABLE_NLS
67# include <libintl.h>
68# define _(String) gettext (String)
69# ifdef gettext_noop
70#  define N_(String) gettext_noop (String)
71# else
72#  define N_(String) (String)
73# endif
74#else
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)
82#endif
83
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: */
87
88/* Look in this variable for a target format */
89#define TARGET_ENVIRON "GNUTARGET"
90
91/* Input sections which are put in a section of this name are actually
92   discarded.  */
93#define DISCARD_SECTION_NAME "/DISCARD/"
94
95/* A file name list */
96typedef struct name_list {
97  const char *name;
98  struct name_list *next;
99}
100name_list;
101
102/* A wildcard specification.  */
103
104typedef enum {
105  none, by_name, by_alignment, by_name_alignment, by_alignment_name
106} sort_type;
107
108extern sort_type sort_section;
109
110struct wildcard_spec {
111  const char *name;
112  struct name_list *exclude_name_list;
113  sort_type sorted;
114};
115
116struct wildcard_list {
117  struct wildcard_list *next;
118  struct wildcard_spec spec;
119};
120
121struct map_symbol_def {
122  struct bfd_link_hash_entry *entry;
123  struct map_symbol_def *next;
124};
125
126/* The initial part of fat_user_section_struct has to be idential with
127   lean_user_section_struct.  */
128typedef 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;
134
135#define get_userdata(x) ((x)->userdata)
136
137#define BYTE_SIZE	(1)
138#define SHORT_SIZE	(2)
139#define LONG_SIZE	(4)
140#define QUAD_SIZE	(8)
141
142typedef struct {
143  /* 1 => assign space to common symbols even if `relocatable_output'.  */
144  bfd_boolean force_common_definition;
145
146  /* 1 => do not assign addresses to common symbols.  */
147  bfd_boolean inhibit_common_definition;
148  bfd_boolean relax;
149
150  /* If TRUE, build MIPS embedded PIC relocation tables in the output
151     file.  */
152  bfd_boolean embedded_relocs;
153
154  /* If TRUE, force generation of a file with a .exe file.  */
155  bfd_boolean force_exe_suffix;
156
157  /* If TRUE, generate a cross reference report.  */
158  bfd_boolean cref;
159
160  /* If TRUE (which is the default), warn about mismatched input
161     files.  */
162  bfd_boolean warn_mismatch;
163
164  /* Warn on attempting to open an incompatible library during a library
165     search.  */
166  bfd_boolean warn_search_mismatch;
167
168
169  /* If TRUE (the default) check section addresses, once compute,
170     fpor overlaps.  */
171  bfd_boolean check_section_addresses;
172
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
176     input files.  */
177  bfd_boolean accept_unknown_input_arch;
178
179  /* Big or little endian as set on command line.  */
180  enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
181
182  /* -Bsymbolic and -Bsymbolic-functions, as set on command line.  */
183  enum
184    {
185      symbolic_unset = 0,
186      symbolic,
187      symbolic_functions,
188    } symbolic;
189
190  /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo
191     and --dynamic-list FILE, as set on command line.  */
192  enum
193    {
194      dynamic_list_unset = 0,
195      dynamic_list_data,
196      dynamic_list
197    } dynamic_list;
198
199  /* Name of runtime interpreter to invoke.  */
200  char *interpreter;
201
202  /* Name to give runtime libary from the -soname argument.  */
203  char *soname;
204
205  /* Runtime library search path from the -rpath argument.  */
206  char *rpath;
207
208  /* Link time runtime library search path from the -rpath-link
209     argument.  */
210  char *rpath_link;
211
212  /* Name of shared object whose symbol table should be filtered with
213     this shared object.  From the --filter option.  */
214  char *filter_shlib;
215
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;
219
220  /* A version symbol to be applied to the symbol names found in the
221     .exports sections.  */
222  char *version_exports_section;
223
224  /* Default linker script.  */
225  char *default_script;
226} args_type;
227
228extern args_type command_line;
229
230typedef int token_code_type;
231
232typedef struct {
233  bfd_boolean magic_demand_paged;
234  bfd_boolean make_executable;
235
236  /* If TRUE, doing a dynamic link.  */
237  bfd_boolean dynamic_link;
238
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
242     parameter.  */
243  bfd_boolean has_shared;
244
245  /* If TRUE, build constructors.  */
246  bfd_boolean build_constructors;
247
248  /* If TRUE, warn about any constructors.  */
249  bfd_boolean warn_constructors;
250
251  /* If TRUE, warn about merging common symbols with others.  */
252  bfd_boolean warn_common;
253
254  /* If TRUE, only warn once about a particular undefined symbol.  */
255  bfd_boolean warn_once;
256
257  /* If TRUE, warn if multiple global-pointers are needed (Alpha
258     only).  */
259  bfd_boolean warn_multiple_gp;
260
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;
264
265  /* If TRUE, warning messages are fatal */
266  bfd_boolean fatal_warnings;
267
268  bfd_boolean sort_common;
269
270  bfd_boolean text_read_only;
271
272  bfd_boolean stats;
273
274  /* If set, orphan input sections will be mapped to separate output
275     sections.  */
276  bfd_boolean unique_orphan_sections;
277
278  /* If set, only search library directories explicitly selected
279     on the command line.  */
280  bfd_boolean only_cmd_line_lib_dirs;
281
282  /* The rpath separation character.  Usually ':'.  */
283  char rpath_separator;
284
285  char *map_filename;
286  FILE *map_file;
287
288  unsigned int split_by_reloc;
289  bfd_size_type split_by_file;
290
291  bfd_size_type specified_data_size;
292
293  /* The size of the hash table to use.  */
294  bfd_size_type hash_table_size;
295
296  /* The maximum page size for ELF.  */
297  bfd_vma maxpagesize;
298
299  /* The common page size for ELF.  */
300  bfd_vma commonpagesize;
301} ld_config_type;
302
303extern ld_config_type config;
304
305extern FILE * saved_script_handle;
306extern bfd_boolean force_make_executable;
307
308/* Non-zero if we are processing a --defsym from the command line.  */
309extern int parsing_defsym;
310
311extern int yyparse (void);
312extern void add_cref (const char *, bfd *, asection *, bfd_vma);
313extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action);
314extern void output_cref (FILE *);
315extern void check_nocrossrefs (void);
316extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
317
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
321#endif
322
323#undef abort
324#define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
325
326#endif
327