ld/ldemul.h

   1 /* ld-emul.h - Linker emulation header file
   2    Copyright 1991, 92, 93, 94, 95, 96, 97, 1998, 2000 Free Software Foundation, Inc.
   3
   4    This file is part of GLD, the Gnu Linker.
   5
   6    GLD 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 1, or (at your option)
   9    any later version.
  10
  11    GLD 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 #ifndef LDEMUL_H
  17 #define LDEMUL_H
  18
  19 #if ANSI_PROTOTYPES
  20 struct lang_input_statement_struct;
  21 struct search_dirs;
  22 #endif
  23
  24 extern void ldemul_hll PARAMS ((char *));
  25 extern void ldemul_syslib PARAMS ((char *));
  26 extern void ldemul_after_parse PARAMS ((void));
  27 extern void ldemul_before_parse PARAMS ((void));
  28 extern void ldemul_after_open PARAMS ((void));
  29 extern void ldemul_after_allocation PARAMS ((void));
  30 extern void ldemul_before_allocation PARAMS ((void));
  31 extern void ldemul_set_output_arch PARAMS ((void));
  32 extern char *ldemul_choose_target PARAMS ((void));
  33 extern void ldemul_choose_mode PARAMS ((char *));
  34 extern void ldemul_list_emulations PARAMS ((FILE *));
  35 extern void ldemul_list_emulation_options PARAMS ((FILE *));
  36 extern char *ldemul_get_script PARAMS ((int *isfile));
  37 extern void ldemul_finish PARAMS ((void));
  38 extern void ldemul_set_symbols PARAMS ((void));
  39 extern void ldemul_create_output_section_statements PARAMS ((void));
  40 extern boolean ldemul_place_orphan
  41   PARAMS ((struct lang_input_statement_struct *, asection *));
  42 extern int ldemul_parse_args PARAMS ((int, char **));
  43 extern boolean ldemul_unrecognized_file
  44   PARAMS ((struct lang_input_statement_struct *));
  45 extern boolean ldemul_recognized_file
  46   PARAMS ((struct lang_input_statement_struct *));
  47 extern boolean ldemul_open_dynamic_archive
  48   PARAMS ((const char *, struct search_dirs *,
  49            struct lang_input_statement_struct *));
  50 extern char *ldemul_default_target PARAMS ((void));
  51 extern void after_parse_default PARAMS ((void));
  52 extern void after_open_default PARAMS ((void));
  53 extern void after_allocation_default PARAMS ((void));
  54 extern void before_allocation_default PARAMS ((void));
  55 extern void set_output_arch_default PARAMS ((void));
  56 extern void syslib_default PARAMS ((char*));
  57 extern void hll_default PARAMS ((char*));
  58 extern int  ldemul_find_potential_libraries
  59   PARAMS ((char *, struct lang_input_statement_struct *));
  60
  61 typedef struct ld_emulation_xfer_struct
  62 {
  63   /* Run before parsing the command line and script file.
  64      Set the architecture, maybe other things.  */
  65   void   (*before_parse) PARAMS ((void));
  66
  67   /* Handle the SYSLIB (low level library) script command.  */
  68   void   (*syslib) PARAMS ((char *));
  69
  70   /* Handle the HLL (high level library) script command.  */
  71   void   (*hll) PARAMS ((char *));
  72
  73   /* Run after parsing the command line and script file.  */
  74   void   (*after_parse) PARAMS ((void));
  75
  76   /* Run after opening all input files, and loading the symbols.  */
  77   void   (*after_open) PARAMS ((void));
  78
  79   /* Run after allocating output sections.  */
  80   void   (*after_allocation) PARAMS ( (void));
  81
  82   /* Set the output architecture and machine if possible.  */
  83   void   (*set_output_arch) PARAMS ((void));
  84
  85   /* Decide which target name to use.  */
  86   char * (*choose_target) PARAMS ((void));
  87
  88   /* Run before allocating output sections.  */
  89   void   (*before_allocation) PARAMS ((void));
  90
  91   /* Return the appropriate linker script.  */
  92   char * (*get_script) PARAMS ((int *isfile));
  93
  94   /* The name of this emulation.  */
  95   char *emulation_name;
  96
  97   /* The output format.  */
  98   char *target_name;
  99
 100   /* Run after assigning values from the script.  */
 101   void  (*finish) PARAMS ((void));
 102
 103   /* Create any output sections needed by the target.  */
 104   void  (*create_output_section_statements) PARAMS ((void));
 105
 106   /* Try to open a dynamic library.  ARCH is an architecture name, and
 107      is normally the empty string.  ENTRY is the lang_input_statement
 108      that should be opened.  */
 109   boolean (*open_dynamic_archive)
 110     PARAMS ((const char *arch, struct search_dirs *,
 111              struct lang_input_statement_struct *entry));
 112
 113   /* Place an orphan section.  Return true if it was placed, false if
 114      the default action should be taken.  This field may be NULL, in
 115      which case the default action will always be taken.  */
 116   boolean (*place_orphan)
 117     PARAMS ((struct lang_input_statement_struct *, asection *));
 118
 119   /* Run after assigning parsing with the args, but before
 120      reading the script.  Used to initialize symbols used in the script. */
 121   void  (*set_symbols) PARAMS ((void));
 122
 123   /* Run to parse args which the base linker doesn't
 124      understand. Return non zero on sucess. */
 125   int (*parse_args) PARAMS ((int, char **));
 126
 127   /* Run to handle files which are not recognized as object files or
 128      archives.  Return true if the file was handled.  */
 129   boolean (*unrecognized_file)
 130     PARAMS ((struct lang_input_statement_struct *));
 131
 132   /* Run to list the command line options which parse_args handles.  */
 133   void (* list_options) PARAMS ((FILE *));
 134
 135   /* Run to specially handle files which *are* recognized as object
 136      files or archives.  Return true if the file was handled.  */
 137   boolean (*recognized_file)
 138     PARAMS ((struct lang_input_statement_struct *));
 139
 140   /* Called when looking for libraries in a directory specified
 141      via a linker command line option or linker script option.
 142      Files that match the pattern "lib*.a" have already been scanned.
 143      (For VMS files matching ":lib*.a" have also been scanned).  */
 144   int (* find_potential_libraries)
 145     PARAMS ((char *, struct lang_input_statement_struct *));
 146
 147 } ld_emulation_xfer_type;
 148
 149 typedef enum
 150 {
 151   intel_ic960_ld_mode_enum,
 152   default_mode_enum ,
 153   intel_gld960_ld_mode_enum
 154 } lang_emulation_mode_enum_type;
 155
 156 extern ld_emulation_xfer_type *ld_emulations[];
 157
 158 #endif