1 /* ld-emul.h - Linker emulation header file
2 Copyright (C) 1991-2014 Free Software Foundation, Inc.
4 This file is part of the GNU Binutils.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
24 /* Forward declaration for ldemul_add_options() and others. */
27 extern void ldemul_hll
29 extern void ldemul_syslib
31 extern void ldemul_after_parse
33 extern void ldemul_before_parse
35 extern void ldemul_after_open
37 extern void ldemul_after_allocation
39 extern void ldemul_before_allocation
41 extern void ldemul_set_output_arch
43 extern char *ldemul_choose_target
45 extern void ldemul_choose_mode
47 extern void ldemul_list_emulations
49 extern void ldemul_list_emulation_options
51 extern char *ldemul_get_script
53 extern void ldemul_finish
55 extern void ldemul_set_symbols
57 extern void ldemul_create_output_section_statements
59 extern lang_output_section_statement_type *ldemul_place_orphan
60 (asection *, const char *, int);
61 extern bfd_boolean ldemul_parse_args
63 extern void ldemul_add_options
64 (int, char **, int, struct option **, int, struct option **);
65 extern bfd_boolean ldemul_handle_option
67 extern bfd_boolean ldemul_unrecognized_file
68 (struct lang_input_statement_struct *);
69 extern bfd_boolean ldemul_recognized_file
70 (struct lang_input_statement_struct *);
71 extern bfd_boolean ldemul_open_dynamic_archive
72 (const char *, struct search_dirs *, struct lang_input_statement_struct *);
73 extern char *ldemul_default_target
75 extern void after_parse_default
77 extern void after_open_default
79 extern void after_allocation_default
81 extern void before_allocation_default
83 extern void finish_default
85 extern void finish_default
87 extern void set_output_arch_default
89 extern void syslib_default
91 extern void hll_default
93 extern int ldemul_find_potential_libraries
94 (char *, struct lang_input_statement_struct *);
95 extern struct bfd_elf_version_expr *ldemul_new_vers_pattern
96 (struct bfd_elf_version_expr *);
98 typedef struct ld_emulation_xfer_struct {
99 /* Run before parsing the command line and script file.
100 Set the architecture, maybe other things. */
101 void (*before_parse) (void);
103 /* Handle the SYSLIB (low level library) script command. */
104 void (*syslib) (char *);
106 /* Handle the HLL (high level library) script command. */
107 void (*hll) (char *);
109 /* Run after parsing the command line and script file. */
110 void (*after_parse) (void);
112 /* Run after opening all input files, and loading the symbols. */
113 void (*after_open) (void);
115 /* Run after allocating output sections. */
116 void (*after_allocation) (void);
118 /* Set the output architecture and machine if possible. */
119 void (*set_output_arch) (void);
121 /* Decide which target name to use. */
122 char * (*choose_target) (int, char**);
124 /* Run before allocating output sections. */
125 void (*before_allocation) (void);
127 /* Return the appropriate linker script. */
128 char * (*get_script) (int *isfile);
130 /* The name of this emulation. */
131 char *emulation_name;
133 /* The output format. */
136 /* Run after assigning values from the script. */
137 void (*finish) (void);
139 /* Create any output sections needed by the target. */
140 void (*create_output_section_statements) (void);
142 /* Try to open a dynamic library. ARCH is an architecture name, and
143 is normally the empty string. ENTRY is the lang_input_statement
144 that should be opened. */
145 bfd_boolean (*open_dynamic_archive)
146 (const char *arch, struct search_dirs *,
147 struct lang_input_statement_struct *entry);
149 /* Place an orphan section. Return TRUE if it was placed, FALSE if
150 the default action should be taken. This field may be NULL, in
151 which case the default action will always be taken. */
152 lang_output_section_statement_type *(*place_orphan)
153 (asection *, const char *, int);
155 /* Run after assigning parsing with the args, but before
156 reading the script. Used to initialize symbols used in the script. */
157 void (*set_symbols) (void);
159 /* Parse args which the base linker doesn't understand.
160 Return TRUE if the arg needs no further processing. */
161 bfd_boolean (*parse_args) (int, char **);
163 /* Hook to add options to parameters passed by the base linker to
164 getopt_long and getopt_long_only calls. */
166 (int, char **, int, struct option **, int, struct option **);
168 /* Companion to the above to handle an option. Returns TRUE if it is
169 one of our options. */
170 bfd_boolean (*handle_option) (int);
172 /* Run to handle files which are not recognized as object files or
173 archives. Return TRUE if the file was handled. */
174 bfd_boolean (*unrecognized_file)
175 (struct lang_input_statement_struct *);
177 /* Run to list the command line options which parse_args handles. */
178 void (* list_options) (FILE *);
180 /* Run to specially handle files which *are* recognized as object
181 files or archives. Return TRUE if the file was handled. */
182 bfd_boolean (*recognized_file)
183 (struct lang_input_statement_struct *);
185 /* Called when looking for libraries in a directory specified
186 via a linker command line option or linker script option.
187 Files that match the pattern "lib*.a" have already been scanned.
188 (For VMS files matching ":lib*.a" have also been scanned). */
189 int (* find_potential_libraries)
190 (char *, struct lang_input_statement_struct *);
192 /* Called when adding a new version pattern. PowerPC64-ELF uses
193 this hook to add a pattern matching ".foo" for every "foo". */
194 struct bfd_elf_version_expr * (*new_vers_pattern)
195 (struct bfd_elf_version_expr *);
197 } ld_emulation_xfer_type;
200 intel_ic960_ld_mode_enum,
202 intel_gld960_ld_mode_enum
203 } lang_emulation_mode_enum_type;
205 extern ld_emulation_xfer_type *ld_emulations[];