ld/ldemul.h

   1 /* ld-emul.h - Linker emulation header file
   2    Copyright (C) 1991-2017 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU Binutils.
   5
   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.
  10
  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.
  15
  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.  */
  20
  21 #ifndef LDEMUL_H
  22 #define LDEMUL_H
  23
  24 /* Forward declaration for ldemul_add_options() and others.  */
  25 struct option;
  26
  27 extern void ldemul_hll
  28   (char *);
  29 extern void ldemul_syslib
  30   (char *);
  31 extern void ldemul_after_parse
  32   (void);
  33 extern void ldemul_before_parse
  34   (void);
  35 extern void ldemul_after_open
  36   (void);
  37 extern void ldemul_after_check_relocs
  38   (void);
  39 extern void ldemul_after_allocation
  40   (void);
  41 extern void ldemul_before_allocation
  42   (void);
  43 extern void ldemul_set_output_arch
  44   (void);
  45 extern char *ldemul_choose_target
  46   (int, char**);
  47 extern void ldemul_choose_mode
  48   (char *);
  49 extern void ldemul_list_emulations
  50   (FILE *);
  51 extern void ldemul_list_emulation_options
  52   (FILE *);
  53 extern char *ldemul_get_script
  54   (int *isfile);
  55 extern void ldemul_finish
  56   (void);
  57 extern void ldemul_set_symbols
  58   (void);
  59 extern void ldemul_create_output_section_statements
  60   (void);
  61 extern lang_output_section_statement_type *ldemul_place_orphan
  62   (asection *, const char *, int);
  63 extern bfd_boolean ldemul_parse_args
  64   (int, char **);
  65 extern void ldemul_add_options
  66   (int, char **, int, struct option **, int, struct option **);
  67 extern bfd_boolean ldemul_handle_option
  68   (int);
  69 extern bfd_boolean ldemul_unrecognized_file
  70   (struct lang_input_statement_struct *);
  71 extern bfd_boolean ldemul_recognized_file
  72   (struct lang_input_statement_struct *);
  73 extern bfd_boolean ldemul_open_dynamic_archive
  74   (const char *, struct search_dirs *, struct lang_input_statement_struct *);
  75 extern char *ldemul_default_target
  76   (int, char**);
  77 extern void after_parse_default
  78   (void);
  79 extern void after_open_default
  80   (void);
  81 extern void after_check_relocs_default
  82   (void);
  83 extern void after_allocation_default
  84   (void);
  85 extern void before_allocation_default
  86   (void);
  87 extern void finish_default
  88   (void);
  89 extern void finish_default
  90   (void);
  91 extern void set_output_arch_default
  92   (void);
  93 extern void syslib_default
  94   (char*);
  95 extern void hll_default
  96   (char*);
  97 extern int  ldemul_find_potential_libraries
  98   (char *, struct lang_input_statement_struct *);
  99 extern struct bfd_elf_version_expr *ldemul_new_vers_pattern
 100   (struct bfd_elf_version_expr *);
 101 extern void ldemul_extra_map_file_text
 102   (bfd *, struct bfd_link_info *, FILE *);
 103
 104 typedef struct ld_emulation_xfer_struct {
 105   /* Run before parsing the command line and script file.
 106      Set the architecture, maybe other things.  */
 107   void   (*before_parse) (void);
 108
 109   /* Handle the SYSLIB (low level library) script command.  */
 110   void   (*syslib) (char *);
 111
 112   /* Handle the HLL (high level library) script command.  */
 113   void   (*hll) (char *);
 114
 115   /* Run after parsing the command line and script file.  */
 116   void   (*after_parse) (void);
 117
 118   /* Run after opening all input files, and loading the symbols.  */
 119   void   (*after_open) (void);
 120
 121   /* Run after checking relocations.  */
 122   void   (*after_check_relocs)  (void);
 123
 124   /* Run after allocating output sections.  */
 125   void   (*after_allocation)  (void);
 126
 127   /* Set the output architecture and machine if possible.  */
 128   void   (*set_output_arch) (void);
 129
 130   /* Decide which target name to use.  */
 131   char * (*choose_target) (int, char**);
 132
 133   /* Run before allocating output sections.  */
 134   void   (*before_allocation) (void);
 135
 136   /* Return the appropriate linker script.  */
 137   char * (*get_script) (int *isfile);
 138
 139   /* The name of this emulation.  */
 140   char *emulation_name;
 141
 142   /* The output format.  */
 143   char *target_name;
 144
 145   /* Run after assigning values from the script.  */
 146   void  (*finish) (void);
 147
 148   /* Create any output sections needed by the target.  */
 149   void  (*create_output_section_statements) (void);
 150
 151   /* Try to open a dynamic library.  ARCH is an architecture name, and
 152      is normally the empty string.  ENTRY is the lang_input_statement
 153      that should be opened.  */
 154   bfd_boolean (*open_dynamic_archive)
 155     (const char *arch, struct search_dirs *,
 156      struct lang_input_statement_struct *entry);
 157
 158   /* Place an orphan section.  Return TRUE if it was placed, FALSE if
 159      the default action should be taken.  This field may be NULL, in
 160      which case the default action will always be taken.  */
 161   lang_output_section_statement_type *(*place_orphan)
 162     (asection *, const char *, int);
 163
 164   /* Run after assigning parsing with the args, but before
 165      reading the script.  Used to initialize symbols used in the script.  */
 166   void  (*set_symbols) (void);
 167
 168   /* Parse args which the base linker doesn't understand.
 169      Return TRUE if the arg needs no further processing.  */
 170   bfd_boolean (*parse_args) (int, char **);
 171
 172   /* Hook to add options to parameters passed by the base linker to
 173      getopt_long and getopt_long_only calls.  */
 174   void (*add_options)
 175     (int, char **, int, struct option **, int, struct option **);
 176
 177   /* Companion to the above to handle an option.  Returns TRUE if it is
 178      one of our options.  */
 179   bfd_boolean (*handle_option) (int);
 180
 181   /* Run to handle files which are not recognized as object files or
 182      archives.  Return TRUE if the file was handled.  */
 183   bfd_boolean (*unrecognized_file)
 184     (struct lang_input_statement_struct *);
 185
 186   /* Run to list the command line options which parse_args handles.  */
 187   void (* list_options) (FILE *);
 188
 189   /* Run to specially handle files which *are* recognized as object
 190      files or archives.  Return TRUE if the file was handled.  */
 191   bfd_boolean (*recognized_file)
 192     (struct lang_input_statement_struct *);
 193
 194   /* Called when looking for libraries in a directory specified
 195      via a linker command line option or linker script option.
 196      Files that match the pattern "lib*.a" have already been scanned.
 197      (For VMS files matching ":lib*.a" have also been scanned).  */
 198   int (* find_potential_libraries)
 199     (char *, struct lang_input_statement_struct *);
 200
 201   /* Called when adding a new version pattern.  PowerPC64-ELF uses
 202      this hook to add a pattern matching ".foo" for every "foo".  */
 203   struct bfd_elf_version_expr * (*new_vers_pattern)
 204     (struct bfd_elf_version_expr *);
 205
 206   /* Called when printing the map file, in case there are
 207      emulation-specific sections for it.  */
 208   void (*extra_map_file_text)
 209     (bfd *, struct bfd_link_info *, FILE *);
 210
 211 } ld_emulation_xfer_type;
 212
 213 typedef enum {
 214   intel_ic960_ld_mode_enum,
 215   default_mode_enum,
 216   intel_gld960_ld_mode_enum
 217 } lang_emulation_mode_enum_type;
 218
 219 extern ld_emulation_xfer_type *ld_emulations[];
 220
 221 #endif