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_allocation
  38   (void);
  39 extern void ldemul_before_allocation
  40   (void);
  41 extern void ldemul_set_output_arch
  42   (void);
  43 extern char *ldemul_choose_target
  44   (int, char**);
  45 extern void ldemul_choose_mode
  46   (char *);
  47 extern void ldemul_list_emulations
  48   (FILE *);
  49 extern void ldemul_list_emulation_options
  50   (FILE *);
  51 extern char *ldemul_get_script
  52   (int *isfile);
  53 extern void ldemul_finish
  54   (void);
  55 extern void ldemul_set_symbols
  56   (void);
  57 extern void ldemul_create_output_section_statements
  58   (void);
  59 extern lang_output_section_statement_type *ldemul_place_orphan
  60   (asection *, const char *, int);
  61 extern bfd_boolean ldemul_parse_args
  62   (int, char **);
  63 extern void ldemul_add_options
  64   (int, char **, int, struct option **, int, struct option **);
  65 extern bfd_boolean ldemul_handle_option
  66   (int);
  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
  74   (int, char**);
  75 extern void after_parse_default
  76   (void);
  77 extern void after_open_default
  78   (void);
  79 extern void after_allocation_default
  80   (void);
  81 extern void before_allocation_default
  82   (void);
  83 extern void finish_default
  84   (void);
  85 extern void finish_default
  86   (void);
  87 extern void set_output_arch_default
  88   (void);
  89 extern void syslib_default
  90   (char*);
  91 extern void hll_default
  92   (char*);
  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 *);
  97 extern void ldemul_extra_map_file_text
  98   (bfd *, struct bfd_link_info *, FILE *);
  99
 100 typedef struct ld_emulation_xfer_struct {
 101   /* Run before parsing the command line and script file.
 102      Set the architecture, maybe other things.  */
 103   void   (*before_parse) (void);
 104
 105   /* Handle the SYSLIB (low level library) script command.  */
 106   void   (*syslib) (char *);
 107
 108   /* Handle the HLL (high level library) script command.  */
 109   void   (*hll) (char *);
 110
 111   /* Run after parsing the command line and script file.  */
 112   void   (*after_parse) (void);
 113
 114   /* Run after opening all input files, and loading the symbols.  */
 115   void   (*after_open) (void);
 116
 117   /* Run after allocating output sections.  */
 118   void   (*after_allocation)  (void);
 119
 120   /* Set the output architecture and machine if possible.  */
 121   void   (*set_output_arch) (void);
 122
 123   /* Decide which target name to use.  */
 124   char * (*choose_target) (int, char**);
 125
 126   /* Run before allocating output sections.  */
 127   void   (*before_allocation) (void);
 128
 129   /* Return the appropriate linker script.  */
 130   char * (*get_script) (int *isfile);
 131
 132   /* The name of this emulation.  */
 133   char *emulation_name;
 134
 135   /* The output format.  */
 136   char *target_name;
 137
 138   /* Run after assigning values from the script.  */
 139   void  (*finish) (void);
 140
 141   /* Create any output sections needed by the target.  */
 142   void  (*create_output_section_statements) (void);
 143
 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);
 150
 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   lang_output_section_statement_type *(*place_orphan)
 155     (asection *, const char *, int);
 156
 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);
 160
 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 **);
 164
 165   /* Hook to add options to parameters passed by the base linker to
 166      getopt_long and getopt_long_only calls.  */
 167   void (*add_options)
 168     (int, char **, int, struct option **, int, struct option **);
 169
 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);
 173
 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 *);
 178
 179   /* Run to list the command line options which parse_args handles.  */
 180   void (* list_options) (FILE *);
 181
 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 *);
 186
 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 *);
 193
 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 *);
 198
 199   /* Called when printing the map file, in case there are
 200      emulation-specific sections for it.  */
 201   void (*extra_map_file_text)
 202     (bfd *, struct bfd_link_info *, FILE *);
 203
 204 } ld_emulation_xfer_type;
 205
 206 typedef enum {
 207   intel_ic960_ld_mode_enum,
 208   default_mode_enum,
 209   intel_gld960_ld_mode_enum
 210 } lang_emulation_mode_enum_type;
 211
 212 extern ld_emulation_xfer_type *ld_emulations[];
 213
 214 #endif