Merge pull request #329 from yuguorui/master
Fix samplecode compiler error with newer GCC.
diff --git a/sgx_unwind/libunwind/include/libunwind_i.h b/sgx_unwind/libunwind/include/libunwind_i.h
index 5977fc8..3b4e7d8 100644
--- a/sgx_unwind/libunwind/include/libunwind_i.h
+++ b/sgx_unwind/libunwind/include/libunwind_i.h
@@ -272,7 +272,6 @@
void *arg);
extern int unwi_dyn_validate_cache (unw_addr_space_t as, void *arg);
-extern unw_dyn_info_list_t _U_dyn_info_list;
extern pthread_mutex_t _U_dyn_info_list_lock;
#if UNW_DEBUG && !HAVE_SGX
diff --git a/sgx_unwind/libunwind/src/x86_64/Ginit.c b/sgx_unwind/libunwind/src/x86_64/Ginit.c
index 3eebe01..47b14a8 100644
--- a/sgx_unwind/libunwind/src/x86_64/Ginit.c
+++ b/sgx_unwind/libunwind/src/x86_64/Ginit.c
@@ -47,13 +47,6 @@
PROTECTED unw_addr_space_t unw_local_addr_space = &local_addr_space;
-HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
-
-/* XXX fix me: there is currently no way to locate the dyn-info list
- by a remote unwinder. On ia64, this is done via a special
- unwind-table entry. Perhaps something similar can be done with
- DWARF2 unwind info. */
-
static void
put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
{
@@ -64,7 +57,13 @@
get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
void *arg)
{
- *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
+#ifndef UNW_LOCAL_ONLY
+# pragma weak _U_dyn_info_list_addr
+ if (!_U_dyn_info_list_addr)
+ return -UNW_ENOINFO;
+#endif
+ // Access the `_U_dyn_info_list` from `LOCAL_ONLY` library, i.e. libunwind.so.
+ *dyn_info_list_addr = _U_dyn_info_list_addr ();
return 0;
}
