diff options
Diffstat (limited to 'libgloss/mcore/sbrk.c')
-rw-r--r-- | libgloss/mcore/sbrk.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/libgloss/mcore/sbrk.c b/libgloss/mcore/sbrk.c new file mode 100644 index 000000000..844958984 --- /dev/null +++ b/libgloss/mcore/sbrk.c @@ -0,0 +1,42 @@ +/* sbrk.c -- allocate memory dynamically. + * + * Copyright (c) 1995,1996,1999 Cygnus Support + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ +#include <sys/types.h> +#include <sys/stat.h> +#include "glue.h" + +caddr_t +_sbrk (size_t incr) +{ + static char *heap_end; + char *prev_heap_end; + char *sp = (char *)&sp; + + if (heap_end == 0) + { + heap_end = _end; + } + prev_heap_end = heap_end; + if (heap_end > sp) + { + _write (1, "Heap and stack collision\n", 25); +#if 0 /* Calling abort brings in the signal handling code. */ + abort (); +#else + exit (1); +#endif + } + heap_end += incr; + return (caddr_t) prev_heap_end; +} |