Subversion Repositories or1k_old

#include <_ansi.h>

#include <sys/types.h>

#include <sys/stat.h>

#include "sys/syscall.h"

int errno;

int __trap0 ();

#define TRAP0(f, p1, p2, p3) __trap0(f, (p1), (p2), (p3))

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;

  if (heap_end + incr > sp)

    {

      _write (1, "Heap and stack collision\n", 25);

      abort ();

    }

  heap_end += incr;

  return (caddr_t) prev_heap_end;

}