ld.h revision 1.3
150276Speter/* ld.h -- general linker header file 250276Speter Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 3174993Srafan 2001, 2002, 2003, 2004, 2005 450276Speter Free Software Foundation, Inc. 550276Speter 650276Speter This file is part of GLD, the Gnu Linker. 750276Speter 850276Speter GLD is free software; you can redistribute it and/or modify 950276Speter it under the terms of the GNU General Public License as published by 1050276Speter the Free Software Foundation; either version 2, or (at your option) 1150276Speter any later version. 1250276Speter 1350276Speter GLD is distributed in the hope that it will be useful, 1450276Speter but WITHOUT ANY WARRANTY; without even the implied warranty of 1550276Speter MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1650276Speter GNU General Public License for more details. 1750276Speter 1850276Speter You should have received a copy of the GNU General Public License 1950276Speter along with GLD; see the file COPYING. If not, write to the Free 2050276Speter Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 2150276Speter 02110-1301, USA. */ 2250276Speter 2350276Speter#ifndef LD_H 2450276Speter#define LD_H 2550276Speter 2650276Speter#ifdef HAVE_LOCALE_H 2750276Speter#endif 2850276Speter#ifndef SEEK_CUR 2950276Speter#define SEEK_CUR 1 30174993Srafan#endif 3150276Speter#ifndef SEEK_END 3250276Speter#define SEEK_END 2 3350276Speter#endif 3450276Speter 3550276Speter#if defined(__GNUC__) && !defined(C_ALLOCA) 3650276Speter# undef alloca 37174993Srafan# define alloca __builtin_alloca 3850276Speter#else 39174993Srafan# if defined(HAVE_ALLOCA_H) && !defined(C_ALLOCA) 4050276Speter# include <alloca.h> 41174993Srafan# else 4250276Speter# ifndef alloca /* predefined by HP cc +Olibcalls */ 43174993Srafan# if !defined (__STDC__) && !defined (__hpux) 4450276Speterchar *alloca (); 4550276Speter# else 4650276Spetervoid *alloca (); 4750276Speter# endif /* __STDC__, __hpux */ 48166124Srafan# endif /* alloca */ 4950276Speter# endif /* HAVE_ALLOCA_H */ 5050276Speter#endif 51166124Srafan 5250276Speter 5350276Speter#ifdef HAVE_LOCALE_H 54166124Srafan# ifndef ENABLE_NLS 5550276Speter /* The Solaris version of locale.h always includes libintl.h. If we have 56166124Srafan been configured with --disable-nls then ENABLE_NLS will not be defined 5750276Speter and the dummy definitions of bindtextdomain (et al) below will conflict 5850276Speter with the defintions in libintl.h. So we define these values to prevent 5950276Speter the bogus inclusion of libintl.h. */ 6050276Speter# define _LIBINTL_H 6150276Speter# define _LIBGETTEXT_H 6250276Speter# endif 6350276Speter# include <locale.h> 6450276Speter#endif 6550276Speter 6650276Speter#ifdef ENABLE_NLS 6750276Speter# include <libintl.h> 6850276Speter# define _(String) gettext (String) 69166124Srafan# ifdef gettext_noop 7050276Speter# define N_(String) gettext_noop (String) 7150276Speter# else 72166124Srafan# define N_(String) (String) 7350276Speter# endif 7450276Speter#else 7550276Speter# define gettext(Msgid) (Msgid) 7650276Speter# define dgettext(Domainname, Msgid) (Msgid) 7750276Speter# define dcgettext(Domainname, Msgid, Category) (Msgid) 7850276Speter# define textdomain(Domainname) while (0) /* nothing */ 7950276Speter# define bindtextdomain(Domainname, Dirname) while (0) /* nothing */ 8050276Speter# define _(String) (String) 8150276Speter# define N_(String) (String) 8250276Speter#endif 8350276Speter 8450276Speter#include "bin-bugs.h" 8550276Speter 8650276Speter/* Look in this environment name for the linker to pretend to be */ 8750276Speter#define EMULATION_ENVIRON "LDEMULATION" 8850276Speter/* If in there look for the strings: */ 8950276Speter 9050276Speter/* 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 */ 98typedef struct name_list { 99 const char *name; 100 struct name_list *next; 101} 102name_list; 103 104/* A wildcard specification. */ 105 106typedef enum { 107 none, by_name, by_alignment, by_name_alignment, by_alignment_name 108} sort_type; 109 110extern sort_type sort_section; 111 112struct wildcard_spec { 113 const char *name; 114 struct name_list *exclude_name_list; 115 sort_type sorted; 116}; 117 118struct wildcard_list { 119 struct wildcard_list *next; 120 struct wildcard_spec spec; 121}; 122 123struct 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. */ 130typedef 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 144typedef 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 205extern args_type command_line; 206 207typedef int token_code_type; 208 209typedef 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 274extern ld_config_type config; 275 276extern FILE * saved_script_handle; 277extern bfd_boolean force_make_executable; 278 279/* Non-zero if we are processing a --defsym from the command line. */ 280extern int parsing_defsym; 281 282extern int yyparse (void); 283extern void add_cref (const char *, bfd *, asection *, bfd_vma); 284extern void output_cref (FILE *); 285extern void check_nocrossrefs (void); 286extern 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