fixed more binutils issues (newer gcc/libc)
[zpugcc/jano.git] / toolchain / gcc / libgloss / mcore / sbrk.c
blob8449589843d58251f22b3bec9477a573951abe2c
1 /* sbrk.c -- allocate memory dynamically.
2 *
3 * Copyright (c) 1995,1996,1999 Cygnus Support
5 * The authors hereby grant permission to use, copy, modify, distribute,
6 * and license this software and its documentation for any purpose, provided
7 * that existing copyright notices are retained in all copies and that this
8 * notice is included verbatim in any distributions. No written agreement,
9 * license, or royalty fee is required for any of the authorized uses.
10 * Modifications to this software may be copyrighted by their authors
11 * and need not follow the licensing terms described here, provided that
12 * the new terms are clearly indicated on the first page of each file where
13 * they apply.
15 #include <sys/types.h>
16 #include <sys/stat.h>
17 #include "glue.h"
19 caddr_t
20 _sbrk (size_t incr)
22 static char *heap_end;
23 char *prev_heap_end;
24 char *sp = (char *)&sp;
26 if (heap_end == 0)
28 heap_end = _end;
30 prev_heap_end = heap_end;
31 if (heap_end > sp)
33 _write (1, "Heap and stack collision\n", 25);
34 #if 0 /* Calling abort brings in the signal handling code. */
35 abort ();
36 #else
37 exit (1);
38 #endif
40 heap_end += incr;
41 return (caddr_t) prev_heap_end;