--- /dev/null	2014-11-19 12:19:41.930000000 -0500
+++ new/src/os_cpu/linux_aarch64/vm/linux_aarch64.S	2015-01-02 08:29:49.379659101 -0500
@@ -0,0 +1,25 @@
+#ifdef BUILTIN_SIM
+
+        .globl SafeFetch32, Fetch32PFI, Fetch32Resume
+        .align  16
+        .type   SafeFetch32,@function
+        // Prototype: int SafeFetch32 (int * Adr, int ErrValue) 
+SafeFetch32:
+        movl    %esi, %eax
+Fetch32PFI:
+        movl    (%rdi), %eax
+Fetch32Resume:
+        ret
+
+        .globl SafeFetchN, FetchNPFI, FetchNResume
+        .align  16
+        .type   SafeFetchN,@function
+        // Prototype: intptr_t SafeFetchN (intptr_t * Adr, intptr_t ErrValue) 
+SafeFetchN:
+        movq    %rsi, %rax
+FetchNPFI:
+        movq    (%rdi), %rax
+FetchNResume:
+        ret
+
+#endif