toolchain/gcc/libgloss/mn10200/sbrk.c

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