1/* ld.h -- general linker header file
2   Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002
3   Free Software Foundation, Inc.
4
5   This file is part of GLD, the Gnu Linker.
6
7   GLD 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 2, or (at your option)
10   any later version.
11
12   GLD 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 GLD; see the file COPYING.  If not, write to the Free
19   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20   02111-1307, USA.  */
21
22#ifndef LD_H
23#define LD_H
24
25#ifdef HAVE_LOCALE_H
26# include <locale.h>
27#endif
28
29#ifdef ENABLE_NLS
30# include <libintl.h>
31# define _(String) gettext (String)
32# ifdef gettext_noop
33#  define N_(String) gettext_noop (String)
34# else
35#  define N_(String) (String)
36# endif
37#else
38# define gettext(Msgid) (Msgid)
39# define dgettext(Domainname, Msgid) (Msgid)
40# define dcgettext(Domainname, Msgid, Category) (Msgid)
41# define textdomain(Domainname) while (0) /* nothing */
42# define bindtextdomain(Domainname, Dirname) while (0) /* nothing */
43# define _(String) (String)
44# define N_(String) (String)
45#endif
46
47#include "bin-bugs.h"
48
49/* Look in this environment name for the linker to pretend to be */
50#define EMULATION_ENVIRON "LDEMULATION"
51/* If in there look for the strings: */
52
53/* Look in this variable for a target format */
54#define TARGET_ENVIRON "GNUTARGET"
55
56/* Input sections which are put in a section of this name are actually
57   discarded.  */
58#define DISCARD_SECTION_NAME "/DISCARD/"
59
60/* A file name list */
61typedef struct name_list {
62  const char *name;
63  struct name_list *next;
64}
65name_list;
66
67/* A wildcard specification.  This is only used in ldgram.y, but it
68   winds up in ldgram.h, so we need to define it outside.  */
69
70struct wildcard_spec {
71  const char *name;
72  struct name_list *exclude_name_list;
73  bfd_boolean sorted;
74};
75
76struct wildcard_list {
77  struct wildcard_list *next;
78  struct wildcard_spec spec;
79};
80
81/* Extra information we hold on sections */
82typedef struct user_section_struct {
83  /* Pointer to the section where this data will go */
84  struct lang_input_statement_struct *file;
85} section_userdata_type;
86
87#define get_userdata(x) ((x)->userdata)
88
89#define BYTE_SIZE	(1)
90#define SHORT_SIZE	(2)
91#define LONG_SIZE	(4)
92#define QUAD_SIZE	(8)
93
94typedef struct {
95  /* 1 => assign space to common symbols even if `relocatable_output'.  */
96  bfd_boolean force_common_definition;
97
98  /* 1 => do not assign addresses to common symbols.  */
99  bfd_boolean inhibit_common_definition;
100  bfd_boolean relax;
101
102  /* Name of runtime interpreter to invoke.  */
103  char *interpreter;
104
105  /* Name to give runtime libary from the -soname argument.  */
106  char *soname;
107
108  /* Runtime library search path from the -rpath argument.  */
109  char *rpath;
110
111  /* Link time runtime library search path from the -rpath-link
112     argument.  */
113  char *rpath_link;
114
115  /* Big or little endian as set on command line.  */
116  enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian;
117
118  /* If TRUE, build MIPS embedded PIC relocation tables in the output
119     file.  */
120  bfd_boolean embedded_relocs;
121
122  /* If TRUE, force generation of a file with a .exe file.  */
123  bfd_boolean force_exe_suffix;
124
125  /* If TRUE, generate a cross reference report.  */
126  bfd_boolean cref;
127
128  /* If TRUE (which is the default), warn about mismatched input
129     files.  */
130  bfd_boolean warn_mismatch;
131
132  /* Remove unreferenced sections?  */
133  bfd_boolean gc_sections;
134
135  /* Name of shared object whose symbol table should be filtered with
136     this shared object.  From the --filter option.  */
137  char *filter_shlib;
138
139  /* Name of shared object for whose symbol table this shared object
140     is an auxiliary filter.  From the --auxiliary option.  */
141  char **auxiliary_filters;
142
143  /* A version symbol to be applied to the symbol names found in the
144     .exports sections.  */
145  char *version_exports_section;
146
147  /* If TRUE (the default) check section addresses, once compute,
148     fpor overlaps.  */
149  bfd_boolean check_section_addresses;
150
151  /* If TRUE allow the linking of input files in an unknown architecture
152     assuming that the user knows what they are doing.  This was the old
153     behaviour of the linker.  The new default behaviour is to reject such
154     input files.  */
155  bfd_boolean accept_unknown_input_arch;
156
157} args_type;
158
159extern args_type command_line;
160
161typedef int token_code_type;
162
163typedef struct {
164  bfd_size_type specified_data_size;
165  bfd_boolean magic_demand_paged;
166  bfd_boolean make_executable;
167
168  /* If TRUE, doing a dynamic link.  */
169  bfd_boolean dynamic_link;
170
171  /* If TRUE, -shared is supported.  */
172  /* ??? A better way to do this is perhaps to define this in the
173     ld_emulation_xfer_struct since this is really a target dependent
174     parameter.  */
175  bfd_boolean has_shared;
176
177  /* If TRUE, build constructors.  */
178  bfd_boolean build_constructors;
179
180  /* If TRUE, warn about any constructors.  */
181  bfd_boolean warn_constructors;
182
183  /* If TRUE, warn about merging common symbols with others.  */
184  bfd_boolean warn_common;
185
186  /* If TRUE, only warn once about a particular undefined symbol.  */
187  bfd_boolean warn_once;
188
189  /* If TRUE, warn if multiple global-pointers are needed (Alpha
190     only).  */
191  bfd_boolean warn_multiple_gp;
192
193  /* If TRUE, warn if the starting address of an output section
194     changes due to the alignment of an input section.  */
195  bfd_boolean warn_section_align;
196
197  /* If TRUE, warning messages are fatal */
198  bfd_boolean fatal_warnings;
199
200  bfd_boolean sort_common;
201
202  bfd_boolean text_read_only;
203
204  /* Classic ELF executable which has data and bss next to each
205     other with no padding for GOT/PLT. */
206  bfd_boolean data_bss_contig;
207
208  char *map_filename;
209  FILE *map_file;
210
211  bfd_boolean stats;
212
213  /* If set, orphan input sections will be mapped to separate output
214     sections.  */
215  bfd_boolean unique_orphan_sections;
216
217  unsigned int split_by_reloc;
218  bfd_size_type split_by_file;
219
220  /* If set, only search library directories explicitly selected
221     on the command line.  */
222  bfd_boolean only_cmd_line_lib_dirs;
223} ld_config_type;
224
225extern ld_config_type config;
226
227typedef enum {
228  lang_first_phase_enum,
229  lang_allocating_phase_enum,
230  lang_final_phase_enum
231} lang_phase_type;
232
233extern FILE * saved_script_handle;
234extern bfd_boolean force_make_executable;
235
236/* Non-zero if we are processing a --defsym from the command line.  */
237extern int parsing_defsym;
238
239extern int yyparse (void);
240extern void add_cref (const char *, bfd *, asection *, bfd_vma);
241extern void output_cref (FILE *);
242extern void check_nocrossrefs (void);
243extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
244
245/* If gcc >= 2.6, we can give a function name, too.  */
246#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
247#define __PRETTY_FUNCTION__  NULL
248#endif
249
250#undef abort
251#define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
252
253#endif
254