ld/ldemul.h

   1 /* ld-emul.h - Linker emulation header file
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2000
   3    Free Software Foundation, Inc.
   4
   5    This file is part of GLD, the Gnu Linker.
   6
   7    GLD is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 1, or (at your option)
  10    any later version.
  11
  12    GLD is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.  */
  16
  17 #ifndef LDEMUL_H
  18 #define LDEMUL_H
  19
  20 extern void ldemul_hll PARAMS ((char *));
  21 extern void ldemul_syslib PARAMS ((char *));
  22 extern void ldemul_after_parse PARAMS ((void));
  23 extern void ldemul_before_parse PARAMS ((void));
  24 extern void ldemul_after_open PARAMS ((void));
  25 extern void ldemul_after_allocation PARAMS ((void));
  26 extern void ldemul_before_allocation PARAMS ((void));
  27 extern void ldemul_set_output_arch PARAMS ((void));
  28 extern char *ldemul_choose_target PARAMS ((int, char**));
  29 extern void ldemul_choose_mode PARAMS ((char *));
  30 extern void ldemul_list_emulations PARAMS ((FILE *));
  31 extern void ldemul_list_emulation_options PARAMS ((FILE *));
  32 extern char *ldemul_get_script PARAMS ((int *isfile));
  33 extern void ldemul_finish PARAMS ((void));
  34 extern void ldemul_set_symbols PARAMS ((void));
  35 extern void ldemul_create_output_section_statements PARAMS ((void));
  36 extern boolean ldemul_place_orphan
  37   PARAMS ((struct lang_input_statement_struct *, asection *));
  38 extern int ldemul_parse_args PARAMS ((int, char **));
  39 extern boolean ldemul_unrecognized_file
  40   PARAMS ((struct lang_input_statement_struct *));
  41 extern boolean ldemul_recognized_file
  42   PARAMS ((struct lang_input_statement_struct *));
  43 extern boolean ldemul_open_dynamic_archive
  44   PARAMS ((const char *, struct search_dirs *,
  45            struct lang_input_statement_struct *));
  46 extern char *ldemul_default_target PARAMS ((int, char**));
  47 extern void after_parse_default PARAMS ((void));
  48 extern void after_open_default PARAMS ((void));
  49 extern void after_allocation_default PARAMS ((void));
  50 extern void before_allocation_default PARAMS ((void));
  51 extern void set_output_arch_default PARAMS ((void));
  52 extern void syslib_default PARAMS ((char*));
  53 extern void hll_default PARAMS ((char*));
  54 extern int  ldemul_find_potential_libraries
  55   PARAMS ((char *, struct lang_input_statement_struct *));
  56
  57 typedef struct ld_emulation_xfer_struct {
  58   /* Run before parsing the command line and script file.
  59      Set the architecture, maybe other things.  */
  60   void   (*before_parse) PARAMS ((void));
  61
  62   /* Handle the SYSLIB (low level library) script command.  */
  63   void   (*syslib) PARAMS ((char *));
  64
  65   /* Handle the HLL (high level library) script command.  */
  66   void   (*hll) PARAMS ((char *));
  67
  68   /* Run after parsing the command line and script file.  */
  69   void   (*after_parse) PARAMS ((void));
  70
  71   /* Run after opening all input files, and loading the symbols.  */
  72   void   (*after_open) PARAMS ((void));
  73
  74   /* Run after allocating output sections.  */
  75   void   (*after_allocation) PARAMS ( (void));
  76
  77   /* Set the output architecture and machine if possible.  */
  78   void   (*set_output_arch) PARAMS ((void));
  79
  80   /* Decide which target name to use.  */
  81   char * (*choose_target) PARAMS ((int, char**));
  82
  83   /* Run before allocating output sections.  */
  84   void   (*before_allocation) PARAMS ((void));
  85
  86   /* Return the appropriate linker script.  */
  87   char * (*get_script) PARAMS ((int *isfile));
  88
  89   /* The name of this emulation.  */
  90   char *emulation_name;
  91
  92   /* The output format.  */
  93   char *target_name;
  94
  95   /* Run after assigning values from the script.  */
  96   void  (*finish) PARAMS ((void));
  97
  98   /* Create any output sections needed by the target.  */
  99   void  (*create_output_section_statements) PARAMS ((void));
 100
 101   /* Try to open a dynamic library.  ARCH is an architecture name, and
 102      is normally the empty string.  ENTRY is the lang_input_statement
 103      that should be opened.  */
 104   boolean (*open_dynamic_archive)
 105     PARAMS ((const char *arch, struct search_dirs *,
 106              struct lang_input_statement_struct *entry));
 107
 108   /* Place an orphan section.  Return true if it was placed, false if
 109      the default action should be taken.  This field may be NULL, in
 110      which case the default action will always be taken.  */
 111   boolean (*place_orphan)
 112     PARAMS ((struct lang_input_statement_struct *, asection *));
 113
 114   /* Run after assigning parsing with the args, but before
 115      reading the script.  Used to initialize symbols used in the script.  */
 116   void  (*set_symbols) PARAMS ((void));
 117
 118   /* Run to parse args which the base linker doesn't
 119      understand. Return non zero on sucess.  */
 120   int (*parse_args) PARAMS ((int, char **));
 121
 122   /* Run to handle files which are not recognized as object files or
 123      archives.  Return true if the file was handled.  */
 124   boolean (*unrecognized_file)
 125     PARAMS ((struct lang_input_statement_struct *));
 126
 127   /* Run to list the command line options which parse_args handles.  */
 128   void (* list_options) PARAMS ((FILE *));
 129
 130   /* Run to specially handle files which *are* recognized as object
 131      files or archives.  Return true if the file was handled.  */
 132   boolean (*recognized_file)
 133     PARAMS ((struct lang_input_statement_struct *));
 134
 135   /* Called when looking for libraries in a directory specified
 136      via a linker command line option or linker script option.
 137      Files that match the pattern "lib*.a" have already been scanned.
 138      (For VMS files matching ":lib*.a" have also been scanned).  */
 139   int (* find_potential_libraries)
 140     PARAMS ((char *, struct lang_input_statement_struct *));
 141
 142 } ld_emulation_xfer_type;
 143
 144 typedef enum {
 145   intel_ic960_ld_mode_enum,
 146   default_mode_enum,
 147   intel_gld960_ld_mode_enum
 148 } lang_emulation_mode_enum_type;
 149
 150 extern ld_emulation_xfer_type *ld_emulations[];
 151
 152 #endif