1 /* ld-emul.h - Linker emulation header file 2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001, 3 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 1, 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 #ifndef LDEMUL_H 19 #define LDEMUL_H 20 21 /* Forward declaration for ldemul_add_options() and others. */ 22 struct option; 23 24 extern void ldemul_hll 25 (char *); 26 extern void ldemul_syslib 27 (char *); 28 extern void ldemul_after_parse 29 (void); 30 extern void ldemul_before_parse 31 (void); 32 extern void ldemul_after_open 33 (void); 34 extern void ldemul_after_allocation 35 (void); 36 extern void ldemul_before_allocation 37 (void); 38 extern void ldemul_set_output_arch 39 (void); 40 extern char *ldemul_choose_target 41 (int, char**); 42 extern void ldemul_choose_mode 43 (char *); 44 extern void ldemul_list_emulations 45 (FILE *); 46 extern void ldemul_list_emulation_options 47 (FILE *); 48 extern char *ldemul_get_script 49 (int *isfile); 50 extern void ldemul_finish 51 (void); 52 extern void ldemul_set_symbols 53 (void); 54 extern void ldemul_create_output_section_statements 55 (void); 56 extern bfd_boolean ldemul_place_orphan 57 (asection *); 58 extern bfd_boolean ldemul_parse_args 59 (int, char **); 60 extern void ldemul_add_options 61 (int, char **, int, struct option **, int, struct option **); 62 extern bfd_boolean ldemul_handle_option 63 (int); 64 extern bfd_boolean ldemul_unrecognized_file 65 (struct lang_input_statement_struct *); 66 extern bfd_boolean ldemul_recognized_file 67 (struct lang_input_statement_struct *); 68 extern bfd_boolean ldemul_open_dynamic_archive 69 (const char *, struct search_dirs *, struct lang_input_statement_struct *); 70 extern char *ldemul_default_target 71 (int, char**); 72 extern void after_parse_default 73 (void); 74 extern void after_open_default 75 (void); 76 extern void after_allocation_default 77 (void); 78 extern void before_allocation_default 79 (void); 80 extern void finish_default 81 (void); 82 extern void finish_default 83 (void); 84 extern void set_output_arch_default 85 (void); 86 extern void syslib_default 87 (char*); 88 extern void hll_default 89 (char*); 90 extern int ldemul_find_potential_libraries 91 (char *, struct lang_input_statement_struct *); 92 extern struct bfd_elf_version_expr *ldemul_new_vers_pattern 93 (struct bfd_elf_version_expr *); 94 95 typedef struct ld_emulation_xfer_struct { 96 /* Run before parsing the command line and script file. 97 Set the architecture, maybe other things. */ 98 void (*before_parse) (void); 99 100 /* Handle the SYSLIB (low level library) script command. */ 101 void (*syslib) (char *); 102 103 /* Handle the HLL (high level library) script command. */ 104 void (*hll) (char *); 105 106 /* Run after parsing the command line and script file. */ 107 void (*after_parse) (void); 108 109 /* Run after opening all input files, and loading the symbols. */ 110 void (*after_open) (void); 111 112 /* Run after allocating output sections. */ 113 void (*after_allocation) (void); 114 115 /* Set the output architecture and machine if possible. */ 116 void (*set_output_arch) (void); 117 118 /* Decide which target name to use. */ 119 char * (*choose_target) (int, char**); 120 121 /* Run before allocating output sections. */ 122 void (*before_allocation) (void); 123 124 /* Return the appropriate linker script. */ 125 char * (*get_script) (int *isfile); 126 127 /* The name of this emulation. */ 128 char *emulation_name; 129 130 /* The output format. */ 131 char *target_name; 132 133 /* Run after assigning values from the script. */ 134 void (*finish) (void); 135 136 /* Create any output sections needed by the target. */ 137 void (*create_output_section_statements) (void); 138 139 /* Try to open a dynamic library. ARCH is an architecture name, and 140 is normally the empty string. ENTRY is the lang_input_statement 141 that should be opened. */ 142 bfd_boolean (*open_dynamic_archive) 143 (const char *arch, struct search_dirs *, 144 struct lang_input_statement_struct *entry); 145 146 /* Place an orphan section. Return TRUE if it was placed, FALSE if 147 the default action should be taken. This field may be NULL, in 148 which case the default action will always be taken. */ 149 bfd_boolean (*place_orphan) 150 (asection *); 151 152 /* Run after assigning parsing with the args, but before 153 reading the script. Used to initialize symbols used in the script. */ 154 void (*set_symbols) (void); 155 156 /* Parse args which the base linker doesn't understand. 157 Return TRUE if the arg needs no further processing. */ 158 bfd_boolean (*parse_args) (int, char **); 159 160 /* Hook to add options to parameters passed by the base linker to 161 getopt_long and getopt_long_only calls. */ 162 void (*add_options) 163 (int, char **, int, struct option **, int, struct option **); 164 165 /* Companion to the above to handle an option. Returns TRUE if it is 166 one of our options. */ 167 bfd_boolean (*handle_option) (int); 168 169 /* Run to handle files which are not recognized as object files or 170 archives. Return TRUE if the file was handled. */ 171 bfd_boolean (*unrecognized_file) 172 (struct lang_input_statement_struct *); 173 174 /* Run to list the command line options which parse_args handles. */ 175 void (* list_options) (FILE *); 176 177 /* Run to specially handle files which *are* recognized as object 178 files or archives. Return TRUE if the file was handled. */ 179 bfd_boolean (*recognized_file) 180 (struct lang_input_statement_struct *); 181 182 /* Called when looking for libraries in a directory specified 183 via a linker command line option or linker script option. 184 Files that match the pattern "lib*.a" have already been scanned. 185 (For VMS files matching ":lib*.a" have also been scanned). */ 186 int (* find_potential_libraries) 187 (char *, struct lang_input_statement_struct *); 188 189 /* Called when adding a new version pattern. PowerPC64-ELF uses 190 this hook to add a pattern matching ".foo" for every "foo". */ 191 struct bfd_elf_version_expr * (*new_vers_pattern) 192 (struct bfd_elf_version_expr *); 193 194 } ld_emulation_xfer_type; 195 196 typedef enum { 197 intel_ic960_ld_mode_enum, 198 default_mode_enum, 199 intel_gld960_ld_mode_enum 200 } lang_emulation_mode_enum_type; 201 202 extern ld_emulation_xfer_type *ld_emulations[]; 203 204 #endif 205