Retro68/gcc/newlib/libc/sys/h8300hms/sbrk.c
2012-03-27 01:51:53 +02:00

29 lines
496 B
C

#include <_ansi.h>
#include <sys/types.h>
#include <sys/stat.h>
register char *stack_ptr asm ("sp");
caddr_t
_sbrk(incr)
int incr;
{
extern char end; /* Defined by the linker */
static char *heap_end;
char *prev_heap_end;
if (heap_end == 0)
{
heap_end = &end;
}
prev_heap_end = heap_end;
if (heap_end + incr > stack_ptr)
{
_write (1, "Heap and stack collision\n", 25);
abort ();
}
heap_end += incr;
return (caddr_t)prev_heap_end;
}