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 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 #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) 44 char *alloca (); 45 # else 46 void *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 */ 96 typedef struct name_list { 97 const char *name; 98 struct name_list *next; 99 } 100 name_list; 101 102 typedef enum {sort_none, sort_ascending, sort_descending} sort_order; 103 104 /* A wildcard specification. */ 105 106 typedef enum { 107 none, by_name, by_alignment, by_name_alignment, by_alignment_name 108 } sort_type; 109 110 extern sort_type sort_section; 111 112 struct wildcard_spec { 113 const char *name; 114 struct name_list *exclude_name_list; 115 sort_type sorted; 116 }; 117 118 struct wildcard_list { 119 struct wildcard_list *next; 120 struct wildcard_spec spec; 121 }; 122 123 struct map_symbol_def { 124 struct bfd_link_hash_entry *entry; 125 struct map_symbol_def *next; 126 }; 127 128 /* The initial part of fat_user_section_struct has to be idential with 129 lean_user_section_struct. */ 130 typedef struct fat_user_section_struct { 131 /* For input sections, when writing a map file: head / tail of a linked 132 list of hash table entries for symbols defined in this section. */ 133 struct map_symbol_def *map_symbol_def_head; 134 struct map_symbol_def **map_symbol_def_tail; 135 } fat_section_userdata_type; 136 137 #define get_userdata(x) ((x)->userdata) 138 139 #define BYTE_SIZE (1) 140 #define SHORT_SIZE (2) 141 #define LONG_SIZE (4) 142 #define QUAD_SIZE (8) 143 144 typedef struct { 145 /* 1 => assign space to common symbols even if `relocatable_output'. */ 146 bfd_boolean force_common_definition; 147 148 /* 1 => do not assign addresses to common symbols. */ 149 bfd_boolean inhibit_common_definition; 150 bfd_boolean relax; 151 152 /* If TRUE, build MIPS embedded PIC relocation tables in the output 153 file. */ 154 bfd_boolean embedded_relocs; 155 156 /* If TRUE, force generation of a file with a .exe file. */ 157 bfd_boolean force_exe_suffix; 158 159 /* If TRUE, generate a cross reference report. */ 160 bfd_boolean cref; 161 162 /* If TRUE (which is the default), warn about mismatched input 163 files. */ 164 bfd_boolean warn_mismatch; 165 166 /* Warn on attempting to open an incompatible library during a library 167 search. */ 168 bfd_boolean warn_search_mismatch; 169 170 171 /* If TRUE (the default) check section addresses, once compute, 172 fpor overlaps. */ 173 bfd_boolean check_section_addresses; 174 175 /* If TRUE allow the linking of input files in an unknown architecture 176 assuming that the user knows what they are doing. This was the old 177 behaviour of the linker. The new default behaviour is to reject such 178 input files. */ 179 bfd_boolean accept_unknown_input_arch; 180 181 /* Big or little endian as set on command line. */ 182 enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian; 183 184 /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */ 185 enum 186 { 187 symbolic_unset = 0, 188 symbolic, 189 symbolic_functions, 190 } symbolic; 191 192 /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo 193 and --dynamic-list FILE, as set on command line. */ 194 enum 195 { 196 dynamic_list_unset = 0, 197 dynamic_list_data, 198 dynamic_list 199 } dynamic_list; 200 201 /* Name of runtime interpreter to invoke. */ 202 char *interpreter; 203 204 /* Name to give runtime libary from the -soname argument. */ 205 char *soname; 206 207 /* Runtime library search path from the -rpath argument. */ 208 char *rpath; 209 210 /* Link time runtime library search path from the -rpath-link 211 argument. */ 212 char *rpath_link; 213 214 /* Name of shared object whose symbol table should be filtered with 215 this shared object. From the --filter option. */ 216 char *filter_shlib; 217 218 /* Name of shared object for whose symbol table this shared object 219 is an auxiliary filter. From the --auxiliary option. */ 220 char **auxiliary_filters; 221 222 /* A version symbol to be applied to the symbol names found in the 223 .exports sections. */ 224 char *version_exports_section; 225 226 /* Default linker script. */ 227 char *default_script; 228 } args_type; 229 230 extern args_type command_line; 231 232 typedef int token_code_type; 233 234 typedef struct { 235 bfd_boolean magic_demand_paged; 236 bfd_boolean make_executable; 237 238 /* If TRUE, doing a dynamic link. */ 239 bfd_boolean dynamic_link; 240 241 /* If TRUE, -shared is supported. */ 242 /* ??? A better way to do this is perhaps to define this in the 243 ld_emulation_xfer_struct since this is really a target dependent 244 parameter. */ 245 bfd_boolean has_shared; 246 247 /* If TRUE, build constructors. */ 248 bfd_boolean build_constructors; 249 250 /* If TRUE, warn about any constructors. */ 251 bfd_boolean warn_constructors; 252 253 /* If TRUE, warn about merging common symbols with others. */ 254 bfd_boolean warn_common; 255 256 /* If TRUE, only warn once about a particular undefined symbol. */ 257 bfd_boolean warn_once; 258 259 /* If TRUE, warn if multiple global-pointers are needed (Alpha 260 only). */ 261 bfd_boolean warn_multiple_gp; 262 263 /* If TRUE, warn if the starting address of an output section 264 changes due to the alignment of an input section. */ 265 bfd_boolean warn_section_align; 266 267 /* If TRUE, warning messages are fatal */ 268 bfd_boolean fatal_warnings; 269 270 sort_order sort_common; 271 272 bfd_boolean text_read_only; 273 274 bfd_boolean stats; 275 276 /* If set, orphan input sections will be mapped to separate output 277 sections. */ 278 bfd_boolean unique_orphan_sections; 279 280 /* If set, only search library directories explicitly selected 281 on the command line. */ 282 bfd_boolean only_cmd_line_lib_dirs; 283 284 /* The rpath separation character. Usually ':'. */ 285 char rpath_separator; 286 287 char *map_filename; 288 FILE *map_file; 289 290 unsigned int split_by_reloc; 291 bfd_size_type split_by_file; 292 293 bfd_size_type specified_data_size; 294 295 /* The size of the hash table to use. */ 296 bfd_size_type hash_table_size; 297 298 /* The maximum page size for ELF. */ 299 bfd_vma maxpagesize; 300 301 /* The common page size for ELF. */ 302 bfd_vma commonpagesize; 303 } ld_config_type; 304 305 extern ld_config_type config; 306 307 extern FILE * saved_script_handle; 308 extern bfd_boolean force_make_executable; 309 310 /* Non-zero if we are processing a --defsym from the command line. */ 311 extern int parsing_defsym; 312 313 extern int yyparse (void); 314 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 315 extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action); 316 extern void output_cref (FILE *); 317 extern void check_nocrossrefs (void); 318 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 319 320 /* If gcc >= 2.6, we can give a function name, too. */ 321 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 322 #define __PRETTY_FUNCTION__ NULL 323 #endif 324 325 #undef abort 326 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 327 328 #endif 329