libgloss/libnosys/sbrk.c

   1 /* Version of sbrk for no operating system.  */
   2
   3 #include "config.h"
   4 #include <_syslist.h>
   5
   6 void *
   7 _sbrk (incr)
   8      int incr;
   9 {
  10    extern char   end; /* Set by linker.  */
  11    static char * heap_end;
  12    char *        prev_heap_end;
  13
  14    if (heap_end == 0)
  15      heap_end = & end;
  16
  17    prev_heap_end = heap_end;
  18    heap_end += incr;
  19
  20    return (void *) prev_heap_end;
  21 }