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. 5 6 This file is part of the GNU Binutils. 7 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. 12 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. 17 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. */ 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#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 47 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 65 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: */ 69 70/* Look in this variable for a target format */ 71#define TARGET_ENVIRON "GNUTARGET" 72 73/* Input sections which are put in a section of this name are actually 74 discarded. */ 75#define DISCARD_SECTION_NAME "/DISCARD/" 76 77/* A file name list */ 78typedef struct name_list { 79 const char *name; 80 struct name_list *next; 81} 82name_list; 83 84typedef enum {sort_none, sort_ascending, sort_descending} sort_order; 85 86/* A wildcard specification. */ 87 88typedef enum { 89 none, by_name, by_alignment, by_name_alignment, by_alignment_name 90} sort_type; 91 92extern sort_type sort_section; 93 94struct wildcard_spec { 95 const char *name; 96 struct name_list *exclude_name_list; 97 sort_type sorted; 98}; 99 100struct wildcard_list { 101 struct wildcard_list *next; 102 struct wildcard_spec spec; 103}; 104 105struct map_symbol_def { 106 struct bfd_link_hash_entry *entry; 107 struct map_symbol_def *next; 108}; 109 110/* The initial part of fat_user_section_struct has to be idential with 111 lean_user_section_struct. */ 112typedef 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 unsigned long map_symbol_def_count; 118} fat_section_userdata_type; 119 120#define get_userdata(x) ((x)->userdata) 121 122#define BYTE_SIZE (1) 123#define SHORT_SIZE (2) 124#define LONG_SIZE (4) 125#define QUAD_SIZE (8) 126 127enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE }; 128 129enum symbolic_enum 130 { 131 symbolic_unset = 0, 132 symbolic, 133 symbolic_functions, 134 }; 135 136enum dynamic_list_enum 137 { 138 dynamic_list_unset = 0, 139 dynamic_list_data, 140 dynamic_list 141 }; 142 143typedef struct { 144 /* 1 => assign space to common symbols even if `relocatable_output'. */ 145 bfd_boolean force_common_definition; 146 147 /* 1 => do not assign addresses to common symbols. */ 148 bfd_boolean inhibit_common_definition; 149 150 /* Enable or disable target specific optimizations. 151 152 Not all targets have optimizations to enable. 153 154 Normally these optimizations are disabled by default but some targets 155 prefer to enable them by default. So this field is a tri-state variable. 156 The values are: 157 158 zero: Enable the optimizations (either from --relax being specified on 159 the command line or the backend's before_allocation emulation function. 160 161 positive: The user has requested that these optimizations be disabled. 162 (Via the --no-relax command line option). 163 164 negative: The optimizations are disabled. (Set when initializing the 165 args_type structure in ldmain.c:main. */ 166 signed int disable_target_specific_optimizations; 167#define RELAXATION_DISABLED_BY_DEFAULT (command_line.disable_target_specific_optimizations < 0) 168#define RELAXATION_DISABLED_BY_USER (command_line.disable_target_specific_optimizations > 0) 169#define RELAXATION_ENABLED (command_line.disable_target_specific_optimizations == 0) 170#define DISABLE_RELAXATION do { command_line.disable_target_specific_optimizations = 1; } while (0) 171#define ENABLE_RELAXATION do { command_line.disable_target_specific_optimizations = 0; } while (0) 172 173 /* If TRUE, build MIPS embedded PIC relocation tables in the output 174 file. */ 175 bfd_boolean embedded_relocs; 176 177 /* If TRUE, force generation of a file with a .exe file. */ 178 bfd_boolean force_exe_suffix; 179 180 /* If TRUE, generate a cross reference report. */ 181 bfd_boolean cref; 182 183 /* If TRUE (which is the default), warn about mismatched input 184 files. */ 185 bfd_boolean warn_mismatch; 186 187 /* Warn on attempting to open an incompatible library during a library 188 search. */ 189 bfd_boolean warn_search_mismatch; 190 191 /* If non-zero check section addresses, once computed, 192 for overlaps. Relocatable links only check when this is > 0. */ 193 signed char check_section_addresses; 194 195 /* If TRUE allow the linking of input files in an unknown architecture 196 assuming that the user knows what they are doing. This was the old 197 behaviour of the linker. The new default behaviour is to reject such 198 input files. */ 199 bfd_boolean accept_unknown_input_arch; 200 201 /* Big or little endian as set on command line. */ 202 enum endian_enum endian; 203 204 /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */ 205 enum symbolic_enum symbolic; 206 207 /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo 208 and --dynamic-list FILE, as set on command line. */ 209 enum dynamic_list_enum dynamic_list; 210 211 /* Name of runtime interpreter to invoke. */ 212 char *interpreter; 213 214 /* Name to give runtime libary from the -soname argument. */ 215 char *soname; 216 217 /* Runtime library search path from the -rpath argument. */ 218 char *rpath; 219 220 /* Link time runtime library search path from the -rpath-link 221 argument. */ 222 char *rpath_link; 223 224 /* Name of shared object whose symbol table should be filtered with 225 this shared object. From the --filter option. */ 226 char *filter_shlib; 227 228 /* Name of shared object for whose symbol table this shared object 229 is an auxiliary filter. From the --auxiliary option. */ 230 char **auxiliary_filters; 231 232 /* A version symbol to be applied to the symbol names found in the 233 .exports sections. */ 234 char *version_exports_section; 235 236 /* Default linker script. */ 237 char *default_script; 238} args_type; 239 240extern args_type command_line; 241 242typedef int token_code_type; 243 244typedef struct { 245 bfd_boolean magic_demand_paged; 246 bfd_boolean make_executable; 247 248 /* If TRUE, doing a dynamic link. */ 249 bfd_boolean dynamic_link; 250 251 /* If TRUE, -shared is supported. */ 252 /* ??? A better way to do this is perhaps to define this in the 253 ld_emulation_xfer_struct since this is really a target dependent 254 parameter. */ 255 bfd_boolean has_shared; 256 257 /* If TRUE, build constructors. */ 258 bfd_boolean build_constructors; 259 260 /* If TRUE, warn about any constructors. */ 261 bfd_boolean warn_constructors; 262 263 /* If TRUE, warn about merging common symbols with others. */ 264 bfd_boolean warn_common; 265 266 /* If TRUE, only warn once about a particular undefined symbol. */ 267 bfd_boolean warn_once; 268 269 /* If TRUE, warn if multiple global-pointers are needed (Alpha 270 only). */ 271 bfd_boolean warn_multiple_gp; 272 273 /* If TRUE, warn if the starting address of an output section 274 changes due to the alignment of an input section. */ 275 bfd_boolean warn_section_align; 276 277 /* If TRUE, warning messages are fatal */ 278 bfd_boolean fatal_warnings; 279 280 sort_order sort_common; 281 282 bfd_boolean text_read_only; 283 284 bfd_boolean stats; 285 286 /* If set, orphan input sections will be mapped to separate output 287 sections. */ 288 bfd_boolean unique_orphan_sections; 289 290 /* If set, only search library directories explicitly selected 291 on the command line. */ 292 bfd_boolean only_cmd_line_lib_dirs; 293 294 /* If set, numbers and absolute symbols are simply treated as 295 numbers everywhere. */ 296 bfd_boolean sane_expr; 297 298 /* The rpath separation character. Usually ':'. */ 299 char rpath_separator; 300 301 char *map_filename; 302 FILE *map_file; 303 304 unsigned int split_by_reloc; 305 bfd_size_type split_by_file; 306 307 bfd_size_type specified_data_size; 308 309 /* The size of the hash table to use. */ 310 bfd_size_type hash_table_size; 311 312 /* The maximum page size for ELF. */ 313 bfd_vma maxpagesize; 314 315 /* The common page size for ELF. */ 316 bfd_vma commonpagesize; 317} ld_config_type; 318 319extern ld_config_type config; 320 321extern FILE * saved_script_handle; 322extern bfd_boolean force_make_executable; 323 324/* Non-zero if we are processing a --defsym from the command line. */ 325extern int parsing_defsym; 326 327extern int yyparse (void); 328extern void add_cref (const char *, bfd *, asection *, bfd_vma); 329extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action); 330extern void output_cref (FILE *); 331extern void check_nocrossrefs (void); 332extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 333 334/* If gcc >= 2.6, we can give a function name, too. */ 335#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 336#define __PRETTY_FUNCTION__ NULL 337#endif 338 339#undef abort 340#define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 341 342#endif 343