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5199 | serge | 1 | /* ld.h -- general linker header file |
2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
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3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
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4 | Free Software Foundation, Inc. |
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5 | |||
6 | This file is part of the GNU Binutils. |
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7 | |||
8 | This program is free software; you can redistribute it and/or modify |
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9 | it under the terms of the GNU General Public License as published by |
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10 | the Free Software Foundation; either version 3 of the License, or |
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11 | (at your option) any later version. |
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12 | |||
13 | This program is distributed in the hope that it will be useful, |
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14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | GNU General Public License for more details. |
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17 | |||
18 | You should have received a copy of the GNU General Public License |
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19 | along with this program; if not, write to the Free Software |
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20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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21 | MA 02110-1301, USA. */ |
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22 | |||
23 | #ifndef LD_H |
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24 | #define LD_H |
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25 | |||
26 | #ifdef HAVE_LOCALE_H |
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27 | #endif |
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28 | #ifndef SEEK_CUR |
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29 | #define SEEK_CUR 1 |
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30 | #endif |
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31 | #ifndef SEEK_END |
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32 | #define SEEK_END 2 |
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33 | #endif |
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34 | |||
35 | #ifdef HAVE_LOCALE_H |
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36 | # ifndef ENABLE_NLS |
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37 | /* The Solaris version of locale.h always includes libintl.h. If we have |
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38 | been configured with --disable-nls then ENABLE_NLS will not be defined |
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39 | and the dummy definitions of bindtextdomain (et al) below will conflict |
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40 | with the defintions in libintl.h. So we define these values to prevent |
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41 | the bogus inclusion of libintl.h. */ |
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42 | # define _LIBINTL_H |
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43 | # define _LIBGETTEXT_H |
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44 | # endif |
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45 | # include |
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46 | #endif |
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47 | |||
48 | #ifdef ENABLE_NLS |
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49 | # include |
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50 | # define _(String) gettext (String) |
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51 | # ifdef gettext_noop |
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52 | # define N_(String) gettext_noop (String) |
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53 | # else |
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54 | # define N_(String) (String) |
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55 | # endif |
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56 | #else |
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57 | # define gettext(Msgid) (Msgid) |
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58 | # define dgettext(Domainname, Msgid) (Msgid) |
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59 | # define dcgettext(Domainname, Msgid, Category) (Msgid) |
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60 | # define textdomain(Domainname) while (0) /* nothing */ |
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61 | # define bindtextdomain(Domainname, Dirname) while (0) /* nothing */ |
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62 | # define _(String) (String) |
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63 | # define N_(String) (String) |
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64 | #endif |
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65 | |||
66 | /* Look in this environment name for the linker to pretend to be */ |
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67 | #define EMULATION_ENVIRON "LDEMULATION" |
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68 | /* If in there look for the strings: */ |
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69 | |||
70 | /* Look in this variable for a target format */ |
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71 | #define TARGET_ENVIRON "GNUTARGET" |
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72 | |||
73 | /* Input sections which are put in a section of this name are actually |
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74 | discarded. */ |
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75 | #define DISCARD_SECTION_NAME "/DISCARD/" |
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76 | |||
77 | /* A file name list */ |
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78 | typedef struct name_list { |
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79 | const char *name; |
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80 | struct name_list *next; |
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81 | } |
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82 | name_list; |
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83 | |||
84 | typedef enum {sort_none, sort_ascending, sort_descending} sort_order; |
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85 | |||
86 | /* A wildcard specification. */ |
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87 | |||
88 | typedef enum { |
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89 | none, by_name, by_alignment, by_name_alignment, by_alignment_name, |
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90 | by_none, by_init_priority |
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91 | } sort_type; |
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92 | |||
93 | extern sort_type sort_section; |
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94 | |||
95 | struct wildcard_spec { |
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96 | const char *name; |
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97 | struct name_list *exclude_name_list; |
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98 | sort_type sorted; |
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99 | struct flag_info *section_flag_list; |
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100 | }; |
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101 | |||
102 | struct wildcard_list { |
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103 | struct wildcard_list *next; |
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104 | struct wildcard_spec spec; |
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105 | }; |
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106 | |||
107 | struct map_symbol_def { |
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108 | struct bfd_link_hash_entry *entry; |
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109 | struct map_symbol_def *next; |
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110 | }; |
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111 | |||
112 | /* The initial part of fat_user_section_struct has to be idential with |
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113 | lean_user_section_struct. */ |
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114 | typedef struct fat_user_section_struct { |
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115 | /* For input sections, when writing a map file: head / tail of a linked |
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116 | list of hash table entries for symbols defined in this section. */ |
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117 | struct map_symbol_def *map_symbol_def_head; |
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118 | struct map_symbol_def **map_symbol_def_tail; |
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119 | unsigned long map_symbol_def_count; |
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120 | } fat_section_userdata_type; |
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121 | |||
122 | #define get_userdata(x) ((x)->userdata) |
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123 | |||
124 | #define BYTE_SIZE (1) |
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125 | #define SHORT_SIZE (2) |
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126 | #define LONG_SIZE (4) |
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127 | #define QUAD_SIZE (8) |
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128 | |||
129 | enum endian_enum { ENDIAN_UNSET = 0, ENDIAN_BIG, ENDIAN_LITTLE }; |
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130 | |||
131 | enum symbolic_enum |
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132 | { |
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133 | symbolic_unset = 0, |
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134 | symbolic, |
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135 | symbolic_functions, |
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136 | }; |
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137 | |||
138 | enum dynamic_list_enum |
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139 | { |
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140 | dynamic_list_unset = 0, |
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141 | dynamic_list_data, |
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142 | dynamic_list |
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143 | }; |
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144 | |||
145 | typedef struct { |
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146 | /* 1 => assign space to common symbols even if `relocatable_output'. */ |
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147 | bfd_boolean force_common_definition; |
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148 | |||
149 | /* 1 => do not assign addresses to common symbols. */ |
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150 | bfd_boolean inhibit_common_definition; |
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151 | |||
152 | /* If TRUE, build MIPS embedded PIC relocation tables in the output |
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153 | file. */ |
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154 | bfd_boolean embedded_relocs; |
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155 | |||
156 | /* If TRUE, force generation of a file with a .exe file. */ |
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157 | bfd_boolean force_exe_suffix; |
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158 | |||
159 | /* If TRUE, generate a cross reference report. */ |
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160 | bfd_boolean cref; |
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161 | |||
162 | /* If TRUE (which is the default), warn about mismatched input |
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163 | files. */ |
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164 | bfd_boolean warn_mismatch; |
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165 | |||
166 | /* Warn on attempting to open an incompatible library during a library |
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167 | search. */ |
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168 | bfd_boolean warn_search_mismatch; |
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169 | |||
170 | /* If non-zero check section addresses, once computed, |
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171 | for overlaps. Relocatable links only check when this is > 0. */ |
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172 | signed char check_section_addresses; |
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173 | |||
174 | /* If TRUE allow the linking of input files in an unknown architecture |
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175 | assuming that the user knows what they are doing. This was the old |
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176 | behaviour of the linker. The new default behaviour is to reject such |
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177 | input files. */ |
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178 | bfd_boolean accept_unknown_input_arch; |
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179 | |||
180 | /* If TRUE we'll just print the default output on stdout. */ |
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181 | bfd_boolean print_output_format; |
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182 | |||
183 | /* Big or little endian as set on command line. */ |
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184 | enum endian_enum endian; |
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185 | |||
186 | /* -Bsymbolic and -Bsymbolic-functions, as set on command line. */ |
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187 | enum symbolic_enum symbolic; |
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188 | |||
189 | /* --dynamic-list, --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo |
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190 | and --dynamic-list FILE, as set on command line. */ |
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191 | enum dynamic_list_enum dynamic_list; |
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192 | |||
193 | /* Name of runtime interpreter to invoke. */ |
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194 | char *interpreter; |
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195 | |||
196 | /* Name to give runtime libary from the -soname argument. */ |
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197 | char *soname; |
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198 | |||
199 | /* Runtime library search path from the -rpath argument. */ |
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200 | char *rpath; |
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201 | |||
202 | /* Link time runtime library search path from the -rpath-link |
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203 | argument. */ |
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204 | char *rpath_link; |
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205 | |||
206 | /* Name of shared object whose symbol table should be filtered with |
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207 | this shared object. From the --filter option. */ |
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208 | char *filter_shlib; |
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209 | |||
210 | /* Name of shared object for whose symbol table this shared object |
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211 | is an auxiliary filter. From the --auxiliary option. */ |
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212 | char **auxiliary_filters; |
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213 | |||
214 | /* A version symbol to be applied to the symbol names found in the |
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215 | .exports sections. */ |
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216 | char *version_exports_section; |
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217 | |||
218 | /* Default linker script. */ |
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219 | char *default_script; |
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220 | } args_type; |
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221 | |||
222 | extern args_type command_line; |
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223 | |||
224 | typedef int token_code_type; |
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225 | |||
226 | typedef struct { |
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227 | bfd_boolean magic_demand_paged; |
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228 | bfd_boolean make_executable; |
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229 | |||
230 | /* If TRUE, -shared is supported. */ |
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231 | /* ??? A better way to do this is perhaps to define this in the |
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232 | ld_emulation_xfer_struct since this is really a target dependent |
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233 | parameter. */ |
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234 | bfd_boolean has_shared; |
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235 | |||
236 | /* If TRUE, build constructors. */ |
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237 | bfd_boolean build_constructors; |
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238 | |||
239 | /* If TRUE, warn about any constructors. */ |
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240 | bfd_boolean warn_constructors; |
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241 | |||
242 | /* If TRUE, warn about merging common symbols with others. */ |
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243 | bfd_boolean warn_common; |
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244 | |||
245 | /* If TRUE, only warn once about a particular undefined symbol. */ |
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246 | bfd_boolean warn_once; |
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247 | |||
248 | /* If TRUE, warn if multiple global-pointers are needed (Alpha |
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249 | only). */ |
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250 | bfd_boolean warn_multiple_gp; |
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251 | |||
252 | /* If TRUE, warn if the starting address of an output section |
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253 | changes due to the alignment of an input section. */ |
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254 | bfd_boolean warn_section_align; |
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255 | |||
256 | /* If TRUE, warning messages are fatal */ |
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257 | bfd_boolean fatal_warnings; |
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258 | |||
259 | sort_order sort_common; |
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260 | |||
261 | bfd_boolean text_read_only; |
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262 | |||
263 | bfd_boolean stats; |
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264 | |||
265 | /* If set, orphan input sections will be mapped to separate output |
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266 | sections. */ |
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267 | bfd_boolean unique_orphan_sections; |
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268 | |||
269 | /* If set, only search library directories explicitly selected |
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270 | on the command line. */ |
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271 | bfd_boolean only_cmd_line_lib_dirs; |
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272 | |||
273 | /* If set, numbers and absolute symbols are simply treated as |
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274 | numbers everywhere. */ |
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275 | bfd_boolean sane_expr; |
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276 | |||
277 | /* If set, code and non-code sections should never be in one segment. */ |
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278 | bfd_boolean separate_code; |
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279 | |||
280 | /* The rpath separation character. Usually ':'. */ |
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281 | char rpath_separator; |
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282 | |||
283 | char *map_filename; |
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284 | FILE *map_file; |
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285 | |||
286 | unsigned int split_by_reloc; |
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287 | bfd_size_type split_by_file; |
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288 | |||
289 | bfd_size_type specified_data_size; |
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290 | |||
291 | /* The size of the hash table to use. */ |
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292 | unsigned long hash_table_size; |
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293 | |||
294 | /* The maximum page size for ELF. */ |
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295 | bfd_vma maxpagesize; |
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296 | |||
297 | /* The common page size for ELF. */ |
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298 | bfd_vma commonpagesize; |
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299 | } ld_config_type; |
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300 | |||
301 | extern ld_config_type config; |
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302 | |||
303 | extern FILE * saved_script_handle; |
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304 | extern bfd_boolean force_make_executable; |
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305 | |||
306 | extern int yyparse (void); |
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307 | extern void add_cref (const char *, bfd *, asection *, bfd_vma); |
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308 | extern bfd_boolean handle_asneeded_cref (bfd *, enum notice_asneeded_action); |
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309 | extern void output_cref (FILE *); |
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310 | extern void check_nocrossrefs (void); |
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311 | extern void ld_abort (const char *, int, const char *) ATTRIBUTE_NORETURN; |
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312 | |||
313 | /* If gcc >= 2.6, we can give a function name, too. */ |
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314 | #if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6) |
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315 | #define __PRETTY_FUNCTION__ NULL |
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316 | #endif |
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317 | |||
318 | #undef abort |
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319 | #define abort() ld_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__) |
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320 | |||
321 | #endif>> |