ld/ldemul.h

   1 /* ld-emul.h - Linker emulation header file
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 2001,
   3    2002, 2003, 2004
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GLD, the Gnu Linker.
   7
   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)
  11    any later version.
  12
  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.  */
  17
  18 #ifndef LDEMUL_H
  19 #define LDEMUL_H
  20
  21 /* Forward declaration for ldemul_add_options() and others.  */
  22 struct option;
  23
  24 extern void ldemul_hll
  25   (char *);
  26 extern void ldemul_syslib
  27   (char *);
  28 extern void ldemul_after_parse
  29   (void);
  30 extern void ldemul_before_parse
  31   (void);
  32 extern void ldemul_after_open
  33   (void);
  34 extern void ldemul_after_allocation
  35   (void);
  36 extern void ldemul_before_allocation
  37   (void);
  38 extern void ldemul_set_output_arch
  39   (void);
  40 extern char *ldemul_choose_target
  41   (int, char**);
  42 extern void ldemul_choose_mode
  43   (char *);
  44 extern void ldemul_list_emulations
  45   (FILE *);
  46 extern void ldemul_list_emulation_options
  47   (FILE *);
  48 extern char *ldemul_get_script
  49   (int *isfile);
  50 extern void ldemul_finish
  51   (void);
  52 extern void ldemul_set_symbols
  53   (void);
  54 extern void ldemul_create_output_section_statements
  55   (void);
  56 extern bfd_boolean ldemul_place_orphan
  57   (struct lang_input_statement_struct *, asection *);
  58 extern bfd_boolean ldemul_parse_args
  59   (int, char **);
  60 extern void ldemul_add_options
  61   (int, char **, int, struct option **, int, struct option **);
  62 extern bfd_boolean ldemul_handle_option
  63   (int);
  64 extern bfd_boolean ldemul_unrecognized_file
  65   (struct lang_input_statement_struct *);
  66 extern bfd_boolean ldemul_recognized_file
  67   (struct lang_input_statement_struct *);
  68 extern bfd_boolean ldemul_open_dynamic_archive
  69   (const char *, struct search_dirs *, struct lang_input_statement_struct *);
  70 extern char *ldemul_default_target
  71   (int, char**);
  72 extern void after_parse_default
  73   (void);
  74 extern void after_open_default
  75   (void);
  76 extern void after_allocation_default
  77   (void);
  78 extern void before_allocation_default
  79   (void);
  80 extern void set_output_arch_default
  81   (void);
  82 extern void syslib_default
  83   (char*);
  84 extern void hll_default
  85   (char*);
  86 extern int  ldemul_find_potential_libraries
  87   (char *, struct lang_input_statement_struct *);
  88 extern struct bfd_elf_version_expr *ldemul_new_vers_pattern
  89   (struct bfd_elf_version_expr *);
  90
  91 typedef struct ld_emulation_xfer_struct {
  92   /* Run before parsing the command line and script file.
  93      Set the architecture, maybe other things.  */
  94   void   (*before_parse) (void);
  95
  96   /* Handle the SYSLIB (low level library) script command.  */
  97   void   (*syslib) (char *);
  98
  99   /* Handle the HLL (high level library) script command.  */
 100   void   (*hll) (char *);
 101
 102   /* Run after parsing the command line and script file.  */
 103   void   (*after_parse) (void);
 104
 105   /* Run after opening all input files, and loading the symbols.  */
 106   void   (*after_open) (void);
 107
 108   /* Run after allocating output sections.  */
 109   void   (*after_allocation)  (void);
 110
 111   /* Set the output architecture and machine if possible.  */
 112   void   (*set_output_arch) (void);
 113
 114   /* Decide which target name to use.  */
 115   char * (*choose_target) (int, char**);
 116
 117   /* Run before allocating output sections.  */
 118   void   (*before_allocation) (void);
 119
 120   /* Return the appropriate linker script.  */
 121   char * (*get_script) (int *isfile);
 122
 123   /* The name of this emulation.  */
 124   char *emulation_name;
 125
 126   /* The output format.  */
 127   char *target_name;
 128
 129   /* Run after assigning values from the script.  */
 130   void  (*finish) (void);
 131
 132   /* Create any output sections needed by the target.  */
 133   void  (*create_output_section_statements) (void);
 134
 135   /* Try to open a dynamic library.  ARCH is an architecture name, and
 136      is normally the empty string.  ENTRY is the lang_input_statement
 137      that should be opened.  */
 138   bfd_boolean (*open_dynamic_archive)
 139     (const char *arch, struct search_dirs *,
 140      struct lang_input_statement_struct *entry);
 141
 142   /* Place an orphan section.  Return TRUE if it was placed, FALSE if
 143      the default action should be taken.  This field may be NULL, in
 144      which case the default action will always be taken.  */
 145   bfd_boolean (*place_orphan)
 146     (struct lang_input_statement_struct *, asection *);
 147
 148   /* Run after assigning parsing with the args, but before
 149      reading the script.  Used to initialize symbols used in the script.  */
 150   void  (*set_symbols) (void);
 151
 152   /* Parse args which the base linker doesn't understand.
 153      Return TRUE if the arg needs no further processing.  */
 154   bfd_boolean (*parse_args) (int, char **);
 155
 156   /* Hook to add options to parameters passed by the base linker to
 157      getopt_long and getopt_long_only calls.  */
 158   void (*add_options)
 159     (int, char **, int, struct option **, int, struct option **);
 160
 161   /* Companion to the above to handle an option.  Returns TRUE if it is
 162      one of our options.  */
 163   bfd_boolean (*handle_option) (int);
 164
 165   /* Run to handle files which are not recognized as object files or
 166      archives.  Return TRUE if the file was handled.  */
 167   bfd_boolean (*unrecognized_file)
 168     (struct lang_input_statement_struct *);
 169
 170   /* Run to list the command line options which parse_args handles.  */
 171   void (* list_options) (FILE *);
 172
 173   /* Run to specially handle files which *are* recognized as object
 174      files or archives.  Return TRUE if the file was handled.  */
 175   bfd_boolean (*recognized_file)
 176     (struct lang_input_statement_struct *);
 177
 178   /* Called when looking for libraries in a directory specified
 179      via a linker command line option or linker script option.
 180      Files that match the pattern "lib*.a" have already been scanned.
 181      (For VMS files matching ":lib*.a" have also been scanned).  */
 182   int (* find_potential_libraries)
 183     (char *, struct lang_input_statement_struct *);
 184
 185   /* Called when adding a new version pattern.  PowerPC64-ELF uses
 186      this hook to add a pattern matching ".foo" for every "foo".  */
 187   struct bfd_elf_version_expr * (*new_vers_pattern)
 188     (struct bfd_elf_version_expr *);
 189
 190 } ld_emulation_xfer_type;
 191
 192 typedef enum {
 193   intel_ic960_ld_mode_enum,
 194   default_mode_enum,
 195   intel_gld960_ld_mode_enum
 196 } lang_emulation_mode_enum_type;
 197
 198 extern ld_emulation_xfer_type *ld_emulations[];
 199
 200 #endif