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/* define.c -- explicitly define a named symbol. */
/* 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 define the value for symbol NAME.
*
* SIZE is the number of bytes required.
*/
int
dld_define_sym (name, size)
const char *name;
unsigned int size;
{
register char *p = 0;
struct nlist dummy_nlist; /* simulate a nlist entry so that
_dld_entry_global_ref can be used. */
register int old_undefined_sym_count;
if (name == 0 || size == 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_UNDF | N_EXT;
dummy_nlist.n_value = size;
old_undefined_sym_count = dld_undefined_sym_count;
_dld_enter_global_ref (_dld_dummy_entry, &dummy_nlist, p);
free (p);
if (old_undefined_sym_count != dld_undefined_sym_count) {
_dld_patch_all_files (_dld_latest_entry);
_dld_exec_flags_valid = 0;
}
return 0;
} /* dld_define_sym */
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