--- a/system/external/libunwind/src/ppc64/Ginit.c

+++ b/system/external/libunwind/src/ppc64/Ginit.c

@@ -234,6 +234,27 @@ get_static_proc_name (unw_addr_space_t as, unw_word_t ip,

   return _Uelf64_get_proc_name (as, getpid (), ip, buf, buf_len, offp, arg);

 }

+static int

+access_mem_unrestricted (unw_addr_space_t as, unw_word_t addr, unw_word_t *val,

+                         int write, void *arg)

+{

+  if (write)

+    return -1;

+

+  *val = *(unw_word_t *) addr;

+  Debug (16, "mem[%x] -> %x\n", addr, *val);

+  return 0;

+}

+

+// This initializes just enough of the address space to call the

+// access memory function.

+PROTECTED void

+unw_local_access_addr_space_init (unw_addr_space_t as)

+{

+  memset (as, 0, sizeof (*as));

+  as->acc.access_mem = access_mem_unrestricted;

+}

+

 HIDDEN void

 ppc64_local_addr_space_init (void)

 {