1 /* ld.h -- general linker header file 2 Copyright (C) 1991-2021 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 sort_type sorted; 102 struct flag_info *section_flag_list; 103 }; 104 105 struct wildcard_list 106 { 107 struct wildcard_list *next; 108 struct wildcard_spec spec; 109 }; 110 111 #define BYTE_SIZE (1) 112 #define SHORT_SIZE (2) 113 #define LONG_SIZE (4) 114 #define QUAD_SIZE (8) 115 116 enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE }; 117 118 typedef struct 119 { 120 /* 1 => assign space to common symbols even if `relocatable_output'. */ 121 bool force_common_definition; 122 123 /* If TRUE, build MIPS embedded PIC relocation tables in the output 124 file. */ 125 bool embedded_relocs; 126 127 /* If TRUE, force generation of a file with a .exe file. */ 128 bool force_exe_suffix; 129 130 /* If TRUE, generate a cross reference report. */ 131 bool cref; 132 133 /* If TRUE (which is the default), warn about mismatched input 134 files. */ 135 bool warn_mismatch; 136 137 /* Warn on attempting to open an incompatible library during a library 138 search. */ 139 bool warn_search_mismatch; 140 141 /* If non-zero check section addresses, once computed, 142 for overlaps. Relocatable links only check when this is > 0. */ 143 signed char check_section_addresses; 144 145 /* If TRUE allow the linking of input files in an unknown architecture 146 assuming that the user knows what they are doing. This was the old 147 behaviour of the linker. The new default behaviour is to reject such 148 input files. */ 149 bool accept_unknown_input_arch; 150 151 /* Name of the import library to generate. */ 152 char *out_implib_filename; 153 154 /* If TRUE we'll just print the default output on stdout. */ 155 bool print_output_format; 156 157 /* If set, display the target memory usage (per memory region). */ 158 bool print_memory_usage; 159 160 /* Should we force section groups to be resolved? Controlled with 161 --force-group-allocation on the command line or FORCE_GROUP_ALLOCATION 162 in the linker script. */ 163 bool force_group_allocation; 164 165 /* Big or little endian as set on command line. */ 166 enum endian_enum endian; 167 168 /* Name of runtime interpreter to invoke. */ 169 char *interpreter; 170 171 /* Name to give runtime library from the -soname argument. */ 172 char *soname; 173 174 /* Runtime library search path from the -rpath argument. */ 175 char *rpath; 176 177 /* Link time runtime library search path from the -rpath-link 178 argument. */ 179 char *rpath_link; 180 181 /* Name of shared object whose symbol table should be filtered with 182 this shared object. From the --filter option. */ 183 char *filter_shlib; 184 185 /* Name of shared object for whose symbol table this shared object 186 is an auxiliary filter. From the --auxiliary option. */ 187 char **auxiliary_filters; 188 189 /* A version symbol to be applied to the symbol names found in the 190 .exports sections. */ 191 char *version_exports_section; 192 193 /* Default linker script. */ 194 char *default_script; 195 } args_type; 196 197 extern args_type command_line; 198 199 typedef int token_code_type; 200 201 /* Different ways we can handle orphan sections. */ 202 203 enum orphan_handling_enum 204 { 205 /* The classic strategy, find a suitable section to place the orphan 206 into. */ 207 orphan_handling_place = 0, 208 209 /* Discard any orphan sections as though they were assign to the section 210 /DISCARD/. */ 211 orphan_handling_discard, 212 213 /* Find somewhere to place the orphan section, as with 214 ORPHAN_HANDLING_PLACE, but also issue a warning. */ 215 orphan_handling_warn, 216 217 /* Issue a fatal error if any orphan sections are found. */ 218 orphan_handling_error, 219 }; 220 221 typedef struct 222 { 223 bool magic_demand_paged; 224 bool make_executable; 225 226 /* If TRUE, -shared is supported. */ 227 /* ??? A better way to do this is perhaps to define this in the 228 ld_emulation_xfer_struct since this is really a target dependent 229 parameter. */ 230 bool has_shared; 231 232 /* If TRUE, build constructors. */ 233 bool build_constructors; 234 235 /* If TRUE, warn about any constructors. */ 236 bool warn_constructors; 237 238 /* If TRUE, warn about merging common symbols with others. */ 239 bool warn_common; 240 241 /* If TRUE, only warn once about a particular undefined symbol. */ 242 bool warn_once; 243 244 /* How should we deal with orphan sections. */ 245 enum orphan_handling_enum orphan_handling; 246 247 /* If TRUE, warn if multiple global-pointers are needed (Alpha 248 only). */ 249 bool warn_multiple_gp; 250 251 /* If TRUE, warn if the starting address of an output section 252 changes due to the alignment of an input section. */ 253 bool warn_section_align; 254 255 /* If TRUE, warning messages are fatal */ 256 bool fatal_warnings; 257 258 sort_order sort_common; 259 260 bool text_read_only; 261 262 bool stats; 263 264 /* If set, orphan input sections will be mapped to separate output 265 sections. */ 266 bool unique_orphan_sections; 267 268 /* If set, only search library directories explicitly selected 269 on the command line. */ 270 bool only_cmd_line_lib_dirs; 271 272 /* If set, numbers and absolute symbols are simply treated as 273 numbers everywhere. */ 274 bool sane_expr; 275 276 /* If set, code and non-code sections should never be in one segment. */ 277 bool separate_code; 278 279 /* The rpath separation character. Usually ':'. */ 280 char rpath_separator; 281 282 char *map_filename; 283 FILE *map_file; 284 285 char *dependency_file; 286 287 unsigned int split_by_reloc; 288 bfd_size_type split_by_file; 289 290 /* The size of the hash table to use. */ 291 unsigned long hash_table_size; 292 293 /* If set, print discarded sections in map file output. */ 294 bool print_map_discarded; 295 296 /* If set, emit the names and types of statically-linked variables 297 into the CTF. */ 298 bool ctf_variables; 299 300 /* If set, share only duplicated types in CTF, rather than sharing 301 all types that are not in conflict. */ 302 bool ctf_share_duplicated; 303 } ld_config_type; 304 305 extern ld_config_type config; 306 307 extern FILE * saved_script_handle; 308 extern bool force_make_executable; 309 310 extern int yyparse (void); 311 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 312 extern bool handle_asneeded_cref (bfd *, enum notice_asneeded_action); 313 extern void output_cref (FILE *); 314 extern void check_nocrossrefs (void); 315 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 316 317 /* If gcc >= 2.6, we can give a function name, too. */ 318 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 319 #define __PRETTY_FUNCTION__ NULL 320 #endif 321 322 #undef abort 323 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 324 325 #endif 326