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 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 #include "bin-bugs.h" 85 86 /* Look in this environment name for the linker to pretend to be */ 87 #define EMULATION_ENVIRON "LDEMULATION" 88 /* If in there look for the strings: */ 89 90 /* Look in this variable for a target format */ 91 #define TARGET_ENVIRON "GNUTARGET" 92 93 /* Input sections which are put in a section of this name are actually 94 discarded. */ 95 #define DISCARD_SECTION_NAME "/DISCARD/" 96 97 /* A file name list */ 98 typedef struct name_list { 99 const char *name; 100 struct name_list *next; 101 } 102 name_list; 103 104 /* A wildcard specification. */ 105 106 typedef enum { 107 none, by_name, by_alignment, by_name_alignment, by_alignment_name 108 } sort_type; 109 110 extern sort_type sort_section; 111 112 struct wildcard_spec { 113 const char *name; 114 struct name_list *exclude_name_list; 115 sort_type sorted; 116 }; 117 118 struct wildcard_list { 119 struct wildcard_list *next; 120 struct wildcard_spec spec; 121 }; 122 123 struct map_symbol_def { 124 struct bfd_link_hash_entry *entry; 125 struct map_symbol_def *next; 126 }; 127 128 /* The initial part of fat_user_section_struct has to be idential with 129 lean_user_section_struct. */ 130 typedef struct fat_user_section_struct { 131 /* For input sections, when writing a map file: head / tail of a linked 132 list of hash table entries for symbols defined in this section. */ 133 struct map_symbol_def *map_symbol_def_head; 134 struct map_symbol_def **map_symbol_def_tail; 135 } fat_section_userdata_type; 136 137 #define get_userdata(x) ((x)->userdata) 138 139 #define BYTE_SIZE (1) 140 #define SHORT_SIZE (2) 141 #define LONG_SIZE (4) 142 #define QUAD_SIZE (8) 143 144 typedef struct { 145 /* 1 => assign space to common symbols even if `relocatable_output'. */ 146 bfd_boolean force_common_definition; 147 148 /* 1 => do not assign addresses to common symbols. */ 149 bfd_boolean inhibit_common_definition; 150 bfd_boolean relax; 151 152 /* Name of runtime interpreter to invoke. */ 153 char *interpreter; 154 155 /* Name to give runtime libary from the -soname argument. */ 156 char *soname; 157 158 /* Runtime library search path from the -rpath argument. */ 159 char *rpath; 160 161 /* Link time runtime library search path from the -rpath-link 162 argument. */ 163 char *rpath_link; 164 165 /* Big or little endian as set on command line. */ 166 enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE } endian; 167 168 /* If TRUE, build MIPS embedded PIC relocation tables in the output 169 file. */ 170 bfd_boolean embedded_relocs; 171 172 /* If TRUE, force generation of a file with a .exe file. */ 173 bfd_boolean force_exe_suffix; 174 175 /* If TRUE, generate a cross reference report. */ 176 bfd_boolean cref; 177 178 /* If TRUE (which is the default), warn about mismatched input 179 files. */ 180 bfd_boolean warn_mismatch; 181 182 /* Name of shared object whose symbol table should be filtered with 183 this shared object. From the --filter option. */ 184 char *filter_shlib; 185 186 /* Name of shared object for whose symbol table this shared object 187 is an auxiliary filter. From the --auxiliary option. */ 188 char **auxiliary_filters; 189 190 /* A version symbol to be applied to the symbol names found in the 191 .exports sections. */ 192 char *version_exports_section; 193 194 /* If TRUE (the default) check section addresses, once compute, 195 fpor overlaps. */ 196 bfd_boolean check_section_addresses; 197 198 /* If TRUE allow the linking of input files in an unknown architecture 199 assuming that the user knows what they are doing. This was the old 200 behaviour of the linker. The new default behaviour is to reject such 201 input files. */ 202 bfd_boolean accept_unknown_input_arch; 203 } args_type; 204 205 extern args_type command_line; 206 207 typedef int token_code_type; 208 209 typedef struct { 210 bfd_size_type specified_data_size; 211 bfd_boolean magic_demand_paged; 212 bfd_boolean make_executable; 213 214 /* If TRUE, doing a dynamic link. */ 215 bfd_boolean dynamic_link; 216 217 /* If TRUE, -shared is supported. */ 218 /* ??? A better way to do this is perhaps to define this in the 219 ld_emulation_xfer_struct since this is really a target dependent 220 parameter. */ 221 bfd_boolean has_shared; 222 223 /* If TRUE, build constructors. */ 224 bfd_boolean build_constructors; 225 226 /* If TRUE, warn about any constructors. */ 227 bfd_boolean warn_constructors; 228 229 /* If TRUE, warn about merging common symbols with others. */ 230 bfd_boolean warn_common; 231 232 /* If TRUE, only warn once about a particular undefined symbol. */ 233 bfd_boolean warn_once; 234 235 /* If TRUE, warn if multiple global-pointers are needed (Alpha 236 only). */ 237 bfd_boolean warn_multiple_gp; 238 239 /* If TRUE, warn if the starting address of an output section 240 changes due to the alignment of an input section. */ 241 bfd_boolean warn_section_align; 242 243 /* If TRUE, warning messages are fatal */ 244 bfd_boolean fatal_warnings; 245 246 bfd_boolean sort_common; 247 248 bfd_boolean text_read_only; 249 250 /* Classic ELF executable which has data and bss next to each 251 other with no padding for GOT/PLT. */ 252 bfd_boolean data_bss_contig; 253 254 char *map_filename; 255 FILE *map_file; 256 257 bfd_boolean stats; 258 259 /* If set, orphan input sections will be mapped to separate output 260 sections. */ 261 bfd_boolean unique_orphan_sections; 262 263 unsigned int split_by_reloc; 264 bfd_size_type split_by_file; 265 266 /* If set, only search library directories explicitly selected 267 on the command line. */ 268 bfd_boolean only_cmd_line_lib_dirs; 269 270 /* The size of the hash table to use. */ 271 bfd_size_type hash_table_size; 272 } ld_config_type; 273 274 extern ld_config_type config; 275 276 extern FILE * saved_script_handle; 277 extern bfd_boolean force_make_executable; 278 279 /* Non-zero if we are processing a --defsym from the command line. */ 280 extern int parsing_defsym; 281 282 extern int yyparse (void); 283 extern void add_cref (const char *, bfd *, asection *, bfd_vma); 284 extern void output_cref (FILE *); 285 extern void check_nocrossrefs (void); 286 extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; 287 288 /* If gcc >= 2.6, we can give a function name, too. */ 289 #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) 290 #define __PRETTY_FUNCTION__ NULL 291 #endif 292 293 #undef abort 294 #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) 295 296 #endif 297