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/* ref.c -- explicitly make a reference to a symbol so that the library
defining this symbol is loaded. */
/* This file is part of DLD, a dynamic link/unlink editor for C.
Copyright (C) 1990 by W. Wilson Ho.
The author can be reached electronically by how@cs.ucdavis.edu or
through physical mail at:
W. Wilson Ho
Division of Computer Science
University of California at Davis
Davis, CA 95616
*/
/* This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 1, or (at your option) any
later version. */
#include "defs.h"
/*
* explicitly create a reference to NAME so that a library routine
* defining it is forced to be loaded. (c.f. "ld -u" option)
* It has no effect on non-library routines (plain object files).
*/
int
dld_create_reference (name)
const char *name;
{
register char *p = 0;
struct nlist dummy_nlist; /* simulate a nlist entry so that
_dld_entery_global_ref can be used. */
if (name == 0)
return 0;
if (setjmp (_dld_env)) {
if (p) free (p);
return dld_errno;
}
if (_dld_dummy_entry == 0)
_dld_create_dummy_entry ();
bzero (&dummy_nlist, sizeof (struct nlist));
p = (char *) _dld_malloc (strlen(name) +2);
*p = '_';
strcpy (p+1, name);
dummy_nlist.n_un.n_name = p;
dummy_nlist.n_type = N_EXT | N_UNDF;
_dld_enter_global_ref (_dld_dummy_entry, &dummy_nlist, p);
free (p);
return 0;
} /* dld_create_reference */
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