diff --git a/linker/linker.h b/linker/linker.h
index 4787471..c65d503 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -101,17 +101,27 @@
 
 void count_relocation(RelocationKind kind);
 
-soinfo* get_libdl_info();
+soinfo* get_libdl_info(const char* linker_path);
 
 void do_android_get_LD_LIBRARY_PATH(char*, size_t);
 void do_android_update_LD_LIBRARY_PATH(const char* ld_library_path);
-void* do_dlopen(const char* name, int flags, const android_dlextinfo* extinfo, void* caller_addr);
+void* do_dlopen(const char* name,
+                int flags,
+                const android_dlextinfo* extinfo,
+                const void* caller_addr);
+
 int do_dlclose(void* handle);
 
 int do_dl_iterate_phdr(int (*cb)(dl_phdr_info* info, size_t size, void* data), void* data);
 
-bool do_dlsym(void* handle, const char* sym_name, const char* sym_ver,
-              void* caller_addr, void** symbol);
+#if defined(__arm__)
+_Unwind_Ptr do_dl_unwind_find_exidx(_Unwind_Ptr pc, int* pcount);
+#endif
+
+bool do_dlsym(void* handle, const char* sym_name,
+              const char* sym_ver,
+              const void* caller_addr,
+              void** symbol);
 
 int do_dladdr(const void* addr, Dl_info* info);