@@ -48,8 +48,19 @@ unsigned long mmap_min_addr;
unsigned long guest_base;
+#if (TARGET_LONG_BITS == 32) && (HOST_LONG_BITS == 64)
+ * When running 32-on-64 we should make sure we can fit all of the possible
+ * guest address space into a contiguous chunk of virtual host memory.
+ * This way we will never overlap with our own libraries or binaries or stack
+ * or anything else that QEMU maps.
+unsigned long reserved_va = 0xf7000000;
unsigned long reserved_va;
static void usage(void);