gdb/firstfile.c

   1 /* Find the initialization functions of following files.
   2    This goes with initialize.h and lastfile.c.
   3
   4    Copyright (C) 1986 Free Software Foundation, Inc.
   5
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 102
 103 In other words, you are welcome to use, share and improve this program.
 104 You are forbidden to forbid anyone else to use, share and improve
 105 what you give them.   Help stamp out software-hoarding!  */
 106
 107
 108
 109 /* This is a magical hack for finding, automatically,
 110    all the files that are linked together
 111    and calling an initialization function in each one
 112    without requiring the main file to know which other
 113    files there are.
 114
 115    Call initialize_all_files to run the initialization functions
 116    of all the files.  Each initialization function can enter
 117    the commands of its file into a global data base so that the
 118    contents of the file can be used.
 119
 120    The files to be found must follow this file.  Each of them
 121    must start START_FILE, before any other functions,
 122    and end with END_FILE, after any other functions.
 123    These macros are defined in initialize.h.
 124    In addition, each file must contain a function named
 125    `initialize', which will be called with no arguments.
 126
 127    After the files to be found must come the file `lastfile'
 128    which ends the chain of calls.  */
 129
 130 #include "initialize.h"
 131
 132 static initialize_next_file ();
 133 static initialize_dummy_1 ();
 134 static initialize_dummy_2 ();
 135
 136 initialize_all_files ()
 137 {
 138   initialize_next_file ((char *) initialize_dummy_2
 139                         - (char *) initialize_dummy_1);
 140 }
 141
 142 /* The next two functions exist just so we can find
 143    out how long the first of them is.
 144    That tells us how long initialize_next_file is,
 145    since that function has the same definition as this one.  */
 146
 147 static
 148 initialize_dummy_1 (offset)
 149      int offset;
 150 {
 151   long addr = FILEADDR_ROUND ((int) initialize_next_file + offset);
 152   (*(void (*) ()) addr) (offset);
 153 }
 154
 155 static
 156 initialize_dummy_2 ()
 157 {
 158 }
 159
 160 /* This makes the function initialize_next_file.  */
 161
 162 END_FILE