1 /* ld.h -- general linker header file 2 Copyright (C) 1991-2014 Free Software Foundation, Inc. 3 4 This file is part of the GNU Binutils. 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 19 MA 02110-1301, USA. */ 20 21 #ifndef LD_H 22 #define LD_H 23 24 #ifdef HAVE_LOCALE_H 25 #endif 26 #ifndef SEEK_CUR 27 #define SEEK_CUR 1 28 #endif 29 #ifndef SEEK_END 30 #define SEEK_END 2 31 #endif 32 33 #ifdef HAVE_LOCALE_H 34 # ifndef ENABLE_NLS 35 /* The Solaris version of locale.h always includes libintl.h. If we have 36 been configured with --disable-nls then ENABLE_NLS will not be defined 37 and the dummy definitions of bindtextdomain (et al) below will conflict 38 with the defintions in libintl.h. So we define these values to prevent 39 the bogus inclusion of libintl.h. */ 40 # define _LIBINTL_H 41 # define _LIBGETTEXT_H 42 # endif 43 # include <locale.h> 44 #endif 45 46 #ifdef ENABLE_NLS 47 # include <libintl.h> 48 # define _(String) gettext (String) 49 # ifdef gettext_noop 50 # define N_(String) gettext_noop (String) 51 # else 52 # define N_(String) (String) 53 # endif 54 #else 55 # define gettext(Msgid) (Msgid) 56 # define dgettext(Domainname, Msgid) (Msgid) 57 # define dcgettext(Domainname, Msgid, Category) (Msgid) 58 # define textdomain(Domainname) while (0) /* nothing */ 59 # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */ 60 # define _(String) (String) 61 # define N_(String) (String) 62 #endif 63 64 /* Look in this environment name for the linker to pretend to be */ 65 #define EMULATION_ENVIRON "LDEMULATION" 66 /* If in there look for the strings: */ 67 68 /* Look in this variable for a target format */ 69 #define TARGET_ENVIRON "GNUTARGET" 70 71 /* Input sections which are put in a section of this name are actually 72 discarded. */ 73 #define DISCARD_SECTION_NAME "/DISCARD/" 74 75 /* A file name list */ 76 typedef struct name_list { 77 const char *name; 78 struct name_list *next; 79 } 80 name_list; 81 82 typedef enum {sort_none, sort_ascending, sort_descending} sort_order; 83 84 /* A wildcard specification. */ 85 86 typedef enum { 87 none, by_name, by_alignment, by_name_alignment, by_alignment_name, 88 by_none, by_init_priority 89 } sort_type; 90 91 extern sort_type sort_section; 92 93 struct wildcard_spec { 94 const char *name; 95 struct name_list *exclude_name_list; 96 sort_type sorted; 97 struct flag_info *section_flag_list; 98 }; 99 100 struct wildcard_list { 101 struct wildcard_list *next; 102 struct wildcard_spec spec; 103 }; 104 105 #define BYTE_SIZE (1) 106 #define SHORT_SIZE (2) 107 #define LONG_SIZE (4) 108 #define QUAD_SIZE (8) 109 110 enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE }; 111 112 enum symbolic_enum 113 { 114 symbolic_unset = 0, 115 symbolic, 116 symbolic_functions, 117 }; 118 119 enum dynamic_list_enum 120 { 121 dynamic_list_unset = 0, 122 dynamic_list_data, 123 dynamic_list 124 }; 125 126 typedef struct { 127 /* 1 => assign space to common symbols even if `relocatable_output'. */ 128 bfd_boolean force_common_definition; 129 130 /* 1 => do not assign addresses to common symbols. */ 131 bfd_boolean inhibit_common_definition; 132 133 /* If TRUE, build MIPS embedded PIC relocation tables in the output 134 file. */ 135 bfd_boolean embedded_relocs; 136 137 /* If TRUE, force generation of a file with a .exe file. */ 138 bfd_boolean force_exe_suffix; 139 140 /* If TRUE, generate a cross reference report. */ 141 bfd_boolean cref; 142 143 /* If TRUE (which is the default), warn about mismatched input 144 files. */ 145 bfd_boolean warn_mismatch; 146 147 /* Warn on attempting to open an incompatible library during a library 148 search. */ 149 bfd_boolean warn_search_mismatch; 150 151 /* If non-zero check section addresses, once computed, 152 for overlaps. Relocatable links only check when this is > 0. */ 153 signed char check_section_addresses; 154 155 /* If TRUE allow the linking of input files in an unknown architecture 156 assuming that the user knows what they are doing. This was the old 157 behaviour of the linker. The new default behaviour is to reject such 158 input files. */ 159 bfd_boolean accept_unknown_input_arch; 160 161 /* If TRUE we'll just print the default output on stdout. */ 162 bfd_boolean print_output_format; 163 164 /* If TRUE warn for uses of system directories when cross linking. */ 165 bfd_boolean warn_poison_system_directories; 166 167 /* If TRUE (default FALSE) give an error for uses of system 168 directories when cross linking instead of a warning. */ 169 bfd_boolean error_poison_system_directories; 170 171 /* Big or little endian as set on command line. */ 172 enum endian_enum endian; 173 174 /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */ 175 enum symbolic_enum symbolic; 176 177 /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo 178 and --dynamic-list FILE, as set on command line. */ 179 enum dynamic_list_enum dynamic_list; 180 181 /* Name of runtime interpreter to invoke. */ 182 char *interpreter; 183 184 /* Name to give runtime libary from the -soname argument. */ 185 char *soname; 186 187 /* Runtime library search path from the -rpath argument. */ 188 char *rpath; 189 190 /* Link time runtime library search path from the -rpath-link 191 argument. */ 192 char *rpath_link; 193 194 /* Name of shared object whose symbol table should be filtered with 195 this shared object. From the --filter option. */ 196 char *filter_shlib; 197 198 /* Name of shared object for whose symbol table this shared object 199 is an auxiliary filter. From the --auxiliary option. */ 200 char **auxiliary_filters; 201 202 /* A version symbol to be applied to the symbol names found in the 203 .exports sections. */ 204 char *version_exports_section; 205 206 /* Default linker script. */ 207 char *default_script; 208 } args_type; 209 210 extern args_type command_line; 211 212 typedef int token_code_type; 213 214 typedef struct { 215 bfd_boolean magic_demand_paged; 216 bfd_boolean make_executable; 217 218 /* If TRUE, -shared is supported. */ 219 /* ??? A better way to do this is perhaps to define this in the 220 ld_emulation_xfer_struct since this is really a target dependent 221 parameter. */ 222 bfd_boolean has_shared; 223 224 /* If TRUE, build constructors. */ 225 bfd_boolean build_constructors; 226 227 /* If TRUE, warn about any constructors. */ 228 bfd_boolean warn_constructors; 229 230 /* If TRUE, warn about merging common symbols with others. */ 231 bfd_boolean warn_common; 232 233 /* If TRUE, only warn once about a particular undefined symbol. */ 234 bfd_boolean warn_once; 235 236 /* If TRUE, warn if multiple global-pointers are needed (Alpha 237 only). */ 238 bfd_boolean warn_multiple_gp; 239 240 /* If TRUE, warn if the starting address of an output section 241 changes due to the alignment of an input section. */ 242 bfd_boolean warn_section_align; 243 244 /* If TRUE, warning messages are fatal */ 245 bfd_boolean fatal_warnings; 246 247 sort_order sort_common; 248 249 bfd_boolean text_read_only; 250 251 bfd_boolean stats; 252 253 /* If set, orphan input sections will be mapped to separate output 254 sections. */ 255 bfd_boolean unique_orphan_sections; 256 257 /* If set, only search library directories explicitly selected 258 on the command line. */ 259 bfd_boolean only_cmd_line_lib_dirs; 260 261 /* If set, numbers and absolute symbols are simply treated as 262 numbers everywhere. */ 263 bfd_boolean sane_expr; 264 265 /* If set, code and non-code sections should never be in one segment. */ 266 bfd_boolean separate_code; 267 268 /* The rpath separation character. Usually ':'. */ 269 char rpath_separator; 270 271 char *map_filename; 272 FILE *map_file; 273 274 unsigned int split_by_reloc; 275 bfd_size_type split_by_file; 276 277 bfd_size_type specified_data_size; 278 279 /* The size of the hash table to use. */ 280 unsigned long hash_table_size; 281 282 /* The maximum page size for ELF. */ 283 bfd_vma maxpagesize; 284 285 /* The common page size for ELF. */ 286 bfd_vma commonpagesize; 287 } ld_config_type; 288 289 extern ld_config_type config; 290 291 extern FILE * saved_script_handle; 292 extern bfd_boolean force_make_executable; 293 294 extern int yyparse (void); 295 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 296 extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action); 297 extern void output_cref (FILE *); 298 extern void check_nocrossrefs (void); 299 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 300 301 /* If gcc >= 2.6, we can give a function name, too. */ 302 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 303 #define __PRETTY_FUNCTION__ NULL 304 #endif 305 306 #undef abort 307 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 308 309 #endif 310