From e40b001a792d7ecce8ff5b7a060ae2bc01bed8b2 Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Sun, 7 Mar 2010 14:33:52 +0100
Subject: [PATCH] Improve placement of dynamically generated code on x64.

---
 src/lj_mcode.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lj_mcode.c b/src/lj_mcode.c
index be3ea1c0..75e0c696 100644
--- a/src/lj_mcode.c
+++ b/src/lj_mcode.c
@@ -128,7 +128,7 @@ static void *mcode_alloc(jit_State *J, size_t sz, int prot)
     uintptr_t hint;
     void *p;
     do {
-      hint = LJ_PRNG_BITS(J, 15) << 16;  /* 64K aligned. */
+      hint = (0x78fb ^ LJ_PRNG_BITS(J, 15)) << 16;  /* 64K aligned. */
     } while (!(hint + sz < range &&
 	       target + hint - (range>>1) < (uintptr_t)1<<47));
     p = mcode_alloc_at(J, target + hint - (range>>1), sz, prot);