273 lines
9.3 KiB
C
273 lines
9.3 KiB
C
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/* ld-emul.h - Linker emulation header file
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Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef LDEMUL_H
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#define LDEMUL_H
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/* Forward declaration for ldemul_add_options() and others. */
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struct option;
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extern void ldemul_hll
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(char *);
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extern void ldemul_syslib
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(char *);
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extern void ldemul_after_parse
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(void);
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extern void ldemul_before_parse
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(void);
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extern void ldemul_before_plugin_all_symbols_read
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(void);
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extern void ldemul_after_open
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(void);
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extern void ldemul_after_check_relocs
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(void);
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extern void ldemul_before_place_orphans
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(void);
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extern void ldemul_after_allocation
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(void);
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extern void ldemul_before_allocation
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(void);
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extern void ldemul_set_output_arch
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(void);
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extern char *ldemul_choose_target
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(int, char**);
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extern void ldemul_choose_mode
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(char *);
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extern void ldemul_list_emulations
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(FILE *);
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extern void ldemul_list_emulation_options
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(FILE *);
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extern char *ldemul_get_script
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(int *isfile);
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extern void ldemul_finish
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(void);
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extern void ldemul_set_symbols
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(void);
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extern void ldemul_create_output_section_statements
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(void);
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extern lang_output_section_statement_type *ldemul_place_orphan
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(asection *, const char *, int);
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extern bool ldemul_parse_args
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(int, char **);
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extern void ldemul_add_options
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(int, char **, int, struct option **, int, struct option **);
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extern bool ldemul_handle_option
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(int);
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extern bool ldemul_unrecognized_file
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(struct lang_input_statement_struct *);
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extern bool ldemul_recognized_file
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(struct lang_input_statement_struct *);
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extern bool ldemul_open_dynamic_archive
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(const char *, struct search_dirs *, struct lang_input_statement_struct *);
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extern char *ldemul_default_target
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(int, char**);
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extern void after_parse_default
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(void);
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extern void after_open_default
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(void);
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extern void after_check_relocs_default
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(void);
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extern void before_place_orphans_default
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(void);
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extern void after_allocation_default
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(void);
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extern void before_allocation_default
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(void);
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extern void finish_default
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(void);
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extern void finish_default
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(void);
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extern void set_output_arch_default
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(void);
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extern void syslib_default
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(char*);
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extern void hll_default
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(char*);
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extern int ldemul_find_potential_libraries
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(char *, struct lang_input_statement_struct *);
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extern struct bfd_elf_version_expr *ldemul_new_vers_pattern
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(struct bfd_elf_version_expr *);
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extern void ldemul_extra_map_file_text
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(bfd *, struct bfd_link_info *, FILE *);
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/* Return 1 if we are emitting CTF early, and 0 if ldemul_examine_strtab_for_ctf
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will be called by the target. */
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extern int ldemul_emit_ctf_early
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(void);
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/* Called from per-target code to examine the strtab and symtab. */
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extern void ldemul_acquire_strings_for_ctf
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(struct ctf_dict *, struct elf_strtab_hash *);
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extern void ldemul_new_dynsym_for_ctf
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(struct ctf_dict *, int symidx, struct elf_internal_sym *);
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extern bool ldemul_print_symbol
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(struct bfd_link_hash_entry *hash_entry, void *ptr);
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typedef struct ld_emulation_xfer_struct {
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/* Run before parsing the command line and script file.
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Set the architecture, maybe other things. */
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void (*before_parse) (void);
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/* Handle the SYSLIB (low level library) script command. */
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void (*syslib) (char *);
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/* Handle the HLL (high level library) script command. */
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void (*hll) (char *);
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/* Run after parsing the command line and script file. */
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void (*after_parse) (void);
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/* Run before calling plugin 'all symbols read' hook. */
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void (*before_plugin_all_symbols_read) (void);
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/* Run after opening all input files, and loading the symbols. */
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void (*after_open) (void);
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/* Run after checking relocations. */
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void (*after_check_relocs) (void);
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/* Run before placing orphans. */
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void (*before_place_orphans) (void);
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/* Run after allocating output sections. */
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void (*after_allocation) (void);
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/* Set the output architecture and machine if possible. */
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void (*set_output_arch) (void);
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/* Decide which target name to use. */
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char * (*choose_target) (int, char**);
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/* Run before allocating output sections. */
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void (*before_allocation) (void);
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/* Return the appropriate linker script. */
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char * (*get_script) (int *isfile);
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/* The name of this emulation. */
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char *emulation_name;
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/* The output format. */
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char *target_name;
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/* Run after assigning values from the script. */
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void (*finish) (void);
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/* Create any output sections needed by the target. */
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void (*create_output_section_statements) (void);
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/* Try to open a dynamic library. ARCH is an architecture name, and
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is normally the empty string. ENTRY is the lang_input_statement
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that should be opened. */
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bool (*open_dynamic_archive)
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(const char *arch, struct search_dirs *,
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struct lang_input_statement_struct *entry);
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/* Place an orphan section. Return TRUE if it was placed, FALSE if
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the default action should be taken. This field may be NULL, in
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which case the default action will always be taken. */
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lang_output_section_statement_type *(*place_orphan)
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(asection *, const char *, int);
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/* Run after assigning parsing with the args, but before
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reading the script. Used to initialize symbols used in the script. */
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void (*set_symbols) (void);
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/* Parse args which the base linker doesn't understand.
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Return TRUE if the arg needs no further processing. */
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bool (*parse_args) (int, char **);
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/* Hook to add options to parameters passed by the base linker to
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getopt_long and getopt_long_only calls. */
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void (*add_options)
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(int, char **, int, struct option **, int, struct option **);
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/* Companion to the above to handle an option. Returns TRUE if it is
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one of our options. */
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bool (*handle_option) (int);
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/* Run to handle files which are not recognized as object files or
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archives. Return TRUE if the file was handled. */
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bool (*unrecognized_file)
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(struct lang_input_statement_struct *);
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/* Run to list the command line options which parse_args handles. */
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void (* list_options) (FILE *);
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/* Run to specially handle files which *are* recognized as object
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files or archives. Return TRUE if the file was handled. */
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bool (*recognized_file)
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(struct lang_input_statement_struct *);
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/* Called when looking for libraries in a directory specified
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via a linker command line option or linker script option.
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Files that match the pattern "lib*.a" have already been scanned.
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(For VMS files matching ":lib*.a" have also been scanned). */
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int (* find_potential_libraries)
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(char *, struct lang_input_statement_struct *);
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/* Called when adding a new version pattern. PowerPC64-ELF uses
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this hook to add a pattern matching ".foo" for every "foo". */
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struct bfd_elf_version_expr * (*new_vers_pattern)
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(struct bfd_elf_version_expr *);
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/* Called when printing the map file, in case there are
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emulation-specific sections for it. */
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void (*extra_map_file_text)
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(bfd *, struct bfd_link_info *, FILE *);
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/* If this returns true, we emit CTF as early as possible: if false, we emit
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CTF once the strtab and symtab are laid out. */
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int (*emit_ctf_early)
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(void);
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/* Called to examine the string table late enough in linking that it is
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finally laid out. If emit_ctf_early returns true, this is not called, and
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ldemul_maybe_emit_ctf emits CTF in 'early' mode: otherwise, it waits
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until 'late'. (Late mode needs explicit support at per-target link time to
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get called at all). If set, called by ld when the examine_strtab
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bfd_link_callback is invoked by per-target code. */
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void (*acquire_strings_for_ctf) (struct ctf_dict *, struct elf_strtab_hash *);
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/* Called when a new symbol is added to the dynamic symbol table. If
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emit_ctf_early returns true, this is not called, and ldemul_maybe_emit_ctf
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emits CTF in 'early' mode: otherwise, it waits until 'late'. (Late mode
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needs explicit support at per-target link time to get called at all). If
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set, called by ld when the ctf_new_symbol bfd_link_callback is invoked by
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per-target code. Called with a NULL symbol when no further symbols will be
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provided. */
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void (*new_dynsym_for_ctf) (struct ctf_dict *, int, struct elf_internal_sym *);
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/* Called when printing a symbol to the map file. AIX uses this
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hook to flag gc'd symbols. */
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bool (*print_symbol)
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(struct bfd_link_hash_entry *hash_entry, void *ptr);
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} ld_emulation_xfer_type;
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typedef enum {
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intel_ic960_ld_mode_enum,
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default_mode_enum,
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intel_gld960_ld_mode_enum
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} lang_emulation_mode_enum_type;
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extern ld_emulation_xfer_type *ld_emulations[];
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#endif
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