1 /*
2 * sim-sbrk.c -- m68k sbrk support when running under the simulator.
3 *
4 * Copyright (c) 1995, 2001 Cygnus Support
5 *
6 * The authors hereby grant permission to use, copy, modify, distribute,
7 * and license this software and its documentation for any purpose, provided
8 * that existing copyright notices are retained in all copies and that this
9 * notice is included verbatim in any distributions. No written agreement,
10 * license, or royalty fee is required for any of the authorized uses.
11 * Modifications to this software may be copyrighted by their authors
12 * and need not follow the licensing terms described here, provided that
13 * the new terms are clearly indicated on the first page of each file where
14 * they apply.
15 */
16
17 extern char _end[];
18 static char *curbrk = _end;
19
20 char *
sbrk(incr)21 sbrk (incr)
22 int incr;
23 {
24 char *oldbrk = curbrk;
25 curbrk += incr;
26 if (brk (curbrk) == -1)
27 return (char *) -1;
28
29 return oldbrk;
30 }
31