iq2000 port.

libgloss/iq2000/sbrk.c

@@ -0,0 +1,30 @@
+#include <_ansi.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "trap.h"
+
+
+caddr_t
+_sbrk (size_t incr)
+{
+  extern char __stack;       /* Defined by the linker */
+  extern char _end;		/* Defined by the linker */
+  static char *heap_end;
+  char *prev_heap_end;
+  char *sp = (char *)&sp;
+
+  if (heap_end == 0)
+    {
+      heap_end = &_end;
+    }
+  prev_heap_end = heap_end;
+  heap_end += incr;
+  if (heap_end > sp)
+    {
+      _write (1, "Heap and stack collision\n", 25);
+      errno = ENOMEM;
+      return (caddr_t)-1;
+    }
+  return (caddr_t) prev_heap_end;
+}