diff --git a/gcc/crtstuff.c b/gcc/crtstuff.c
--- a/gcc/crtstuff.c
+++ b/gcc/crtstuff.c
@@ -53,6 +53,8 @@ see the files COPYING3 and COPYING.RUNTI
    identified the set of defines that need to go into auto-target.h,
    this will have to do.  */
 #include "auto-host.h"
+#include <sys/mman.h>
+
 #undef pid_t
 #undef rlim_t
 #undef ssize_t
@@ -563,8 +565,29 @@ static void __attribute__((used))
 __do_global_ctors_aux (void)
 {
   func_ptr *p;
-  for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
+  long top = 0;
+  long base = 0;
+
+  for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--) {
+    long value = (long)*p;
+    if (value) {
+      if (top == 0) {
+        top = ((value)/4096+1)*4096;
+        base = value;
+      } else if (value < base)
+        base = value;
+    }
+  }
+
+  if (top) {
+    base = base/4096*4096;
+    int ret = madvise((void*)base, top - base, MADV_WILLNEED);
+    fprintf(stderr, "%x %x madvise:%d\n", base, top - base, ret);
+  }
+
+  for (p++;p != __CTOR_END__;p++) {
     (*p) ();
+  }
 }
 
 /* Stick a call to __do_global_ctors_aux into the .init section.  */