/* Version of sbrk for no operating system.  */

#include <_syslist.h>

void *
sbrk (incr)
     int incr;
{ 
   extern char  _heap_start; /* Set by linker. */
   static char *heap_end; 
   char        *prev_heap_end; 

   if (heap_end == 0)
     heap_end = &_heap_start;

   prev_heap_end = heap_end; 
   heap_end += incr; 

   return (void *)prev_heap_end; 
}