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