1 /* ld.h -- general linker header file 2 Copyright (C) 1991-2020 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 ngettext(Msgid1, Msgid2, n) \ 59 (n == 1 ? Msgid1 : Msgid2) 60 # define dngettext(Domainname, Msgid1, Msgid2, n) \ 61 (n == 1 ? Msgid1 : Msgid2) 62 # define dcngettext(Domainname, Msgid1, Msgid2, n, Category) \ 63 (n == 1 ? Msgid1 : Msgid2) 64 # define textdomain(Domainname) do {} while (0) 65 # define bindtextdomain(Domainname, Dirname) do {} while (0) 66 # define _(String) (String) 67 # define N_(String) (String) 68 #endif 69 70 /* Look in this environment name for the linker to pretend to be */ 71 #define EMULATION_ENVIRON "LDEMULATION" 72 /* If in there look for the strings: */ 73 74 /* Look in this variable for a target format */ 75 #define TARGET_ENVIRON "GNUTARGET" 76 77 /* Input sections which are put in a section of this name are actually 78 discarded. */ 79 #define DISCARD_SECTION_NAME "/DISCARD/" 80 81 /* A file name list. */ 82 typedef struct name_list 83 { 84 const char *name; 85 struct name_list *next; 86 } 87 name_list; 88 89 typedef enum {sort_none, sort_ascending, sort_descending} sort_order; 90 91 /* A wildcard specification. */ 92 93 typedef enum 94 { 95 none, by_name, by_alignment, by_name_alignment, by_alignment_name, 96 by_none, by_init_priority 97 } sort_type; 98 99 extern sort_type sort_section; 100 101 struct wildcard_spec 102 { 103 const char *name; 104 struct name_list *exclude_name_list; 105 sort_type sorted; 106 struct flag_info *section_flag_list; 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 bfd_boolean force_common_definition; 126 127 /* If TRUE, build MIPS embedded PIC relocation tables in the output 128 file. */ 129 bfd_boolean embedded_relocs; 130 131 /* If TRUE, force generation of a file with a .exe file. */ 132 bfd_boolean force_exe_suffix; 133 134 /* If TRUE, generate a cross reference report. */ 135 bfd_boolean cref; 136 137 /* If TRUE (which is the default), warn about mismatched input 138 files. */ 139 bfd_boolean warn_mismatch; 140 141 /* Warn on attempting to open an incompatible library during a library 142 search. */ 143 bfd_boolean 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 bfd_boolean 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 bfd_boolean print_output_format; 160 161 /* If set, display the target memory usage (per memory region). */ 162 bfd_boolean 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 bfd_boolean 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 bfd_boolean magic_demand_paged; 228 bfd_boolean 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 bfd_boolean has_shared; 235 236 /* If TRUE, build constructors. */ 237 bfd_boolean build_constructors; 238 239 /* If TRUE, warn about any constructors. */ 240 bfd_boolean warn_constructors; 241 242 /* If TRUE, warn about merging common symbols with others. */ 243 bfd_boolean warn_common; 244 245 /* If TRUE, only warn once about a particular undefined symbol. */ 246 bfd_boolean 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 bfd_boolean 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 bfd_boolean warn_section_align; 258 259 /* If TRUE, warning messages are fatal */ 260 bfd_boolean fatal_warnings; 261 262 sort_order sort_common; 263 264 bfd_boolean text_read_only; 265 266 bfd_boolean stats; 267 268 /* If set, orphan input sections will be mapped to separate output 269 sections. */ 270 bfd_boolean unique_orphan_sections; 271 272 /* If set, only search library directories explicitly selected 273 on the command line. */ 274 bfd_boolean only_cmd_line_lib_dirs; 275 276 /* If set, numbers and absolute symbols are simply treated as 277 numbers everywhere. */ 278 bfd_boolean sane_expr; 279 280 /* If set, code and non-code sections should never be in one segment. */ 281 bfd_boolean separate_code; 282 283 /* The rpath separation character. Usually ':'. */ 284 char rpath_separator; 285 286 char *map_filename; 287 FILE *map_file; 288 289 unsigned int split_by_reloc; 290 bfd_size_type split_by_file; 291 292 /* The size of the hash table to use. */ 293 unsigned long hash_table_size; 294 295 /* The maximum page size for ELF. */ 296 bfd_vma maxpagesize; 297 298 /* The common page size for ELF. */ 299 bfd_vma commonpagesize; 300 301 /* If set, print discarded sections in map file output. */ 302 bfd_boolean print_map_discarded; 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 extern int yyparse (void); 311 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 312 extern bfd_boolean 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