ld/ldemul.h

   1 /* ld-emul.h - Linker emulation header file
   2    Copyright 1991, 92, 93, 94, 95, 96, 97, 1998 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
  59 typedef struct ld_emulation_xfer_struct
  60 {
  61   /* Run before parsing the command line and script file.
  62      Set the architecture, maybe other things.  */
  63   void   (*before_parse) PARAMS ((void));
  64
  65   /* Handle the SYSLIB (low level library) script command.  */
  66   void   (*syslib) PARAMS ((char *));
  67
  68   /* Handle the HLL (high level library) script command.  */
  69   void   (*hll) PARAMS ((char *));
  70
  71   /* Run after parsing the command line and script file.  */
  72   void   (*after_parse) PARAMS ((void));
  73
  74   /* Run after opening all input files, and loading the symbols.  */
  75   void   (*after_open) PARAMS ((void));
  76
  77   /* Run after allocating output sections.  */
  78   void   (*after_allocation) PARAMS ( (void));
  79
  80   /* Set the output architecture and machine if possible.  */
  81   void   (*set_output_arch) PARAMS ((void));
  82
  83   /* Decide which target name to use.  */
  84   char * (*choose_target) PARAMS ((void));
  85
  86   /* Run before allocating output sections.  */
  87   void   (*before_allocation) PARAMS ((void));
  88
  89   /* Return the appropriate linker script.  */
  90   char * (*get_script) PARAMS ((int *isfile));
  91
  92   /* The name of this emulation.  */
  93   char *emulation_name;
  94
  95   /* The output format.  */
  96   char *target_name;
  97
  98   /* Run after assigning values from the script.  */
  99   void  (*finish) PARAMS ((void));
 100
 101   /* Create any output sections needed by the target.  */
 102   void  (*create_output_section_statements) PARAMS ((void));
 103
 104   /* Try to open a dynamic library.  ARCH is an architecture name, and
 105      is normally the empty string.  ENTRY is the lang_input_statement
 106      that should be opened.  */
 107   boolean (*open_dynamic_archive)
 108     PARAMS ((const char *arch, struct search_dirs *,
 109              struct lang_input_statement_struct *entry));
 110
 111   /* Place an orphan section.  Return true if it was placed, false if
 112      the default action should be taken.  This field may be NULL, in
 113      which case the default action will always be taken.  */
 114   boolean (*place_orphan)
 115     PARAMS ((struct lang_input_statement_struct *, asection *));
 116
 117   /* Run after assigning parsing with the args, but before
 118      reading the script.  Used to initialize symbols used in the script. */
 119   void  (*set_symbols) PARAMS ((void));
 120
 121   /* Run to parse args which the base linker doesn't
 122      understand. Return non zero on sucess. */
 123   int (*parse_args) PARAMS ((int, char **));
 124
 125   /* Run to handle files which are not recognized as object files or
 126      archives.  Return true if the file was handled.  */
 127   boolean (*unrecognized_file)
 128     PARAMS ((struct lang_input_statement_struct *));
 129
 130   /* Run to list the command line options which parse_args handles.  */
 131   void (* list_options) PARAMS ((FILE *));
 132
 133   /* Run to specially handle files which *are* recognized as object
 134      files or archives.  Return true if the file was handled.  */
 135   boolean (*recognized_file)
 136     PARAMS ((struct lang_input_statement_struct *));
 137
 138 } ld_emulation_xfer_type;
 139
 140 typedef enum
 141 {
 142   intel_ic960_ld_mode_enum,
 143   default_mode_enum ,
 144   intel_gld960_ld_mode_enum
 145 } lang_emulation_mode_enum_type;
 146
 147 extern ld_emulation_xfer_type *ld_emulations[];
 148
 149 #endif