1 /* ld.h -- general linker header file 2 Copyright (C) 1991-2024 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 #ifndef SEEK_CUR 25 #define SEEK_CUR 1 26 #endif 27 #ifndef SEEK_END 28 #define SEEK_END 2 29 #endif 30 31 #ifndef ENABLE_NLS 32 /* The Solaris version of locale.h always includes libintl.h. If we have 33 been configured with --disable-nls then ENABLE_NLS will not be defined 34 and the dummy definitions of bindtextdomain (et al) below will conflict 35 with the defintions in libintl.h. So we define these values to prevent 36 the bogus inclusion of libintl.h. */ 37 # define _LIBINTL_H 38 # define _LIBGETTEXT_H 39 #endif 40 #include <locale.h> 41 42 #ifdef ENABLE_NLS 43 # include <libintl.h> 44 # define _(String) gettext (String) 45 # ifdef gettext_noop 46 # define N_(String) gettext_noop (String) 47 # else 48 # define N_(String) (String) 49 # endif 50 #else 51 # define gettext(Msgid) (Msgid) 52 # define dgettext(Domainname, Msgid) (Msgid) 53 # define dcgettext(Domainname, Msgid, Category) (Msgid) 54 # define ngettext(Msgid1, Msgid2, n) \ 55 (n == 1 ? Msgid1 : Msgid2) 56 # define dngettext(Domainname, Msgid1, Msgid2, n) \ 57 (n == 1 ? Msgid1 : Msgid2) 58 # define dcngettext(Domainname, Msgid1, Msgid2, n, Category) \ 59 (n == 1 ? Msgid1 : Msgid2) 60 # define textdomain(Domainname) do {} while (0) 61 # define bindtextdomain(Domainname, Dirname) do {} while (0) 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. */ 78 typedef struct name_list 79 { 80 const char *name; 81 struct name_list *next; 82 } 83 name_list; 84 85 typedef enum {sort_none, sort_ascending, sort_descending} sort_order; 86 87 /* A wildcard specification. */ 88 89 typedef enum 90 { 91 none, by_name, by_alignment, by_name_alignment, by_alignment_name, 92 by_none, by_init_priority 93 } sort_type; 94 95 extern sort_type sort_section; 96 97 struct wildcard_spec 98 { 99 const char * name; 100 struct name_list * exclude_name_list; 101 struct flag_info * section_flag_list; 102 size_t namelen; 103 size_t prefixlen; 104 size_t suffixlen; 105 sort_type sorted; 106 bool reversed; 107 }; 108 109 struct wildcard_list 110 { 111 struct wildcard_list *next; 112 struct wildcard_spec spec; 113 }; 114 115 #define BYTE_SIZE (1) 116 #define SHORT_SIZE (2) 117 #define LONG_SIZE (4) 118 #define QUAD_SIZE (8) 119 120 enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE }; 121 122 typedef struct 123 { 124 /* 1 => assign space to common symbols even if `relocatable_output'. */ 125 bool force_common_definition; 126 127 /* If TRUE, build MIPS embedded PIC relocation tables in the output 128 file. */ 129 bool embedded_relocs; 130 131 /* If TRUE, force generation of a file with a .exe file. */ 132 bool force_exe_suffix; 133 134 /* If TRUE, generate a cross reference report. */ 135 bool cref; 136 137 /* If TRUE (which is the default), warn about mismatched input 138 files. */ 139 bool warn_mismatch; 140 141 /* Warn on attempting to open an incompatible library during a library 142 search. */ 143 bool warn_search_mismatch; 144 145 /* If non-zero check section addresses, once computed, 146 for overlaps. Relocatable links only check when this is > 0. */ 147 signed char check_section_addresses; 148 149 /* If TRUE allow the linking of input files in an unknown architecture 150 assuming that the user knows what they are doing. This was the old 151 behaviour of the linker. The new default behaviour is to reject such 152 input files. */ 153 bool accept_unknown_input_arch; 154 155 /* Name of the import library to generate. */ 156 char *out_implib_filename; 157 158 /* If TRUE we'll just print the default output on stdout. */ 159 bool print_output_format; 160 161 /* If set, display the target memory usage (per memory region). */ 162 bool print_memory_usage; 163 164 /* Should we force section groups to be resolved? Controlled with 165 --force-group-allocation on the command line or FORCE_GROUP_ALLOCATION 166 in the linker script. */ 167 bool force_group_allocation; 168 169 /* Big or little endian as set on command line. */ 170 enum endian_enum endian; 171 172 /* Name of runtime interpreter to invoke. */ 173 char *interpreter; 174 175 /* Name to give runtime library from the -soname argument. */ 176 char *soname; 177 178 /* Runtime library search path from the -rpath argument. */ 179 char *rpath; 180 181 /* Link time runtime library search path from the -rpath-link 182 argument. */ 183 char *rpath_link; 184 185 /* Name of shared object whose symbol table should be filtered with 186 this shared object. From the --filter option. */ 187 char *filter_shlib; 188 189 /* Name of shared object for whose symbol table this shared object 190 is an auxiliary filter. From the --auxiliary option. */ 191 char **auxiliary_filters; 192 193 /* A version symbol to be applied to the symbol names found in the 194 .exports sections. */ 195 char *version_exports_section; 196 197 /* Default linker script. */ 198 char *default_script; 199 } args_type; 200 201 extern args_type command_line; 202 203 typedef int token_code_type; 204 205 /* Different ways we can handle orphan sections. */ 206 207 enum orphan_handling_enum 208 { 209 /* The classic strategy, find a suitable section to place the orphan 210 into. */ 211 orphan_handling_place = 0, 212 213 /* Discard any orphan sections as though they were assign to the section 214 /DISCARD/. */ 215 orphan_handling_discard, 216 217 /* Find somewhere to place the orphan section, as with 218 ORPHAN_HANDLING_PLACE, but also issue a warning. */ 219 orphan_handling_warn, 220 221 /* Issue a fatal error if any orphan sections are found. */ 222 orphan_handling_error, 223 }; 224 225 typedef struct 226 { 227 bool magic_demand_paged; 228 bool make_executable; 229 230 /* If TRUE, -shared is supported. */ 231 /* ??? A better way to do this is perhaps to define this in the 232 ld_emulation_xfer_struct since this is really a target dependent 233 parameter. */ 234 bool has_shared; 235 236 /* If TRUE, build constructors. */ 237 bool build_constructors; 238 239 /* If TRUE, warn about any constructors. */ 240 bool warn_constructors; 241 242 /* If TRUE, warn about merging common symbols with others. */ 243 bool warn_common; 244 245 /* If TRUE, only warn once about a particular undefined symbol. */ 246 bool warn_once; 247 248 /* How should we deal with orphan sections. */ 249 enum orphan_handling_enum orphan_handling; 250 251 /* If TRUE, warn if multiple global-pointers are needed (Alpha 252 only). */ 253 bool warn_multiple_gp; 254 255 /* If TRUE, warn if the starting address of an output section 256 changes due to the alignment of an input section. */ 257 bool warn_section_align; 258 259 /* If TRUE, warning messages are fatal. */ 260 bool fatal_warnings; 261 262 /* If TRUE, warning and error messages are ignored. */ 263 bool no_warnings; 264 265 sort_order sort_common; 266 267 bool text_read_only; 268 269 bool stats; 270 271 /* If set, orphan input sections will be mapped to separate output 272 sections. */ 273 bool unique_orphan_sections; 274 275 /* If set, only search library directories explicitly selected 276 on the command line. */ 277 bool only_cmd_line_lib_dirs; 278 279 /* If set, numbers and absolute symbols are simply treated as 280 numbers everywhere. */ 281 bool sane_expr; 282 283 /* If set, code and non-code sections should never be in one segment. */ 284 bool separate_code; 285 286 /* If set, generation of ELF section header should be suppressed. */ 287 bool no_section_header; 288 289 /* The rpath separation character. Usually ':'. */ 290 char rpath_separator; 291 292 char *map_filename; 293 FILE *map_file; 294 295 char *dependency_file; 296 297 unsigned int split_by_reloc; 298 bfd_size_type split_by_file; 299 300 /* The size of the hash table to use. */ 301 unsigned long hash_table_size; 302 303 /* If set, print discarded sections in map file output. */ 304 bool print_map_discarded; 305 306 /* If set, print local symbols in map file output. */ 307 bool print_map_locals; 308 309 /* If set, emit the names and types of statically-linked variables 310 into the CTF. */ 311 bool ctf_variables; 312 313 /* If set, share only duplicated types in CTF, rather than sharing 314 all types that are not in conflict. */ 315 bool ctf_share_duplicated; 316 317 /* Compress DWARF debug sections. */ 318 enum compressed_debug_section_type compress_debug; 319 } ld_config_type; 320 321 extern ld_config_type config; 322 323 extern FILE * saved_script_handle; 324 extern bool force_make_executable; 325 326 extern int yyparse (void); 327 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 328 extern bool handle_asneeded_cref (bfd *, enum notice_asneeded_action); 329 extern void output_cref (FILE *); 330 extern void check_nocrossrefs (void); 331 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 332 333 /* If gcc >= 2.6, we can give a function name, too. */ 334 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 335 #define __PRETTY_FUNCTION__ NULL 336 #endif 337 338 #undef abort 339 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 340 341 #endif 342