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) 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 /* A wildcard specification. */ 103 104 typedef enum { 105 none, by_name, by_alignment, by_name_alignment, by_alignment_name 106 } sort_type; 107 108 extern sort_type sort_section; 109 110 struct wildcard_spec { 111 const char *name; 112 struct name_list *exclude_name_list; 113 sort_type sorted; 114 }; 115 116 struct wildcard_list { 117 struct wildcard_list *next; 118 struct wildcard_spec spec; 119 }; 120 121 struct 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. */ 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; 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) 141 142 typedef 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; 227 228 extern args_type command_line; 229 230 typedef int token_code_type; 231 232 typedef 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; 302 303 extern ld_config_type config; 304 305 extern FILE * saved_script_handle; 306 extern bfd_boolean force_make_executable; 307 308 /* Non-zero if we are processing a --defsym from the command line. */ 309 extern int parsing_defsym; 310 311 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; 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