Index: cpu-exec.c
===================================================================
RCS file: /sources/qemu/qemu/cpu-exec.c,v
retrieving revision 1.126
diff -u -r1.126 cpu-exec.c
--- cpu-exec.c	23 Nov 2007 02:11:10 -0000	1.126
+++ cpu-exec.c	30 Nov 2007 22:43:22 -0000
@@ -140,7 +140,11 @@
     virt_page2 = (pc + tb->size - 1) & TARGET_PAGE_MASK;
     phys_page2 = -1;
     if ((pc & TARGET_PAGE_MASK) != virt_page2) {
+      if (tb->size == 0) {
+        printf("Bad code in QEMU %s:%u\n", __FILE__, __LINE__);
+      } else {
         phys_page2 = get_phys_addr_code(env, virt_page2);
+      }
     }
     tb_link_phys(tb, phys_pc, phys_page2);