blob: 78945e77ae259843d97f278b1bd91dc3c4a396e7 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdlib.h>
#include "trap.h"
extern int _write (int, char *, size_t);
caddr_t
_sbrk (size_t incr)
{
extern char end; /* Defined by the linker */
static char *heap_end;
char *prev_heap_end;
#if 0
char *sp = (char *)stack_ptr;
#else
char *sp = (char *)&sp;
#endif
if (heap_end == 0)
{
heap_end = &end;
}
prev_heap_end = heap_end;
heap_end += incr;
if (heap_end > sp)
{
_write (1, "Heap and stack collision\n", 25);
abort ();
}
return (caddr_t) prev_heap_end;
}
|