diff --git a/linker/linker.h b/linker/linker.h
index c65d503..7746982 100644
--- a/linker/linker.h
+++ b/linker/linker.h
@@ -103,6 +103,8 @@
 
 soinfo* get_libdl_info(const char* linker_path);
 
+soinfo* find_containing_library(const void* p);
+
 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,
@@ -125,6 +127,10 @@
 
 int do_dladdr(const void* addr, Dl_info* info);
 
+// void ___cfi_slowpath(uint64_t CallSiteTypeId, void *Ptr, void *Ret);
+// void ___cfi_slowpath_diag(uint64_t CallSiteTypeId, void *Ptr, void *DiagData, void *Ret);
+void ___cfi_fail(uint64_t CallSiteTypeId, void* Ptr, void *DiagData, void *Ret);
+
 void set_application_target_sdk_version(uint32_t target);
 uint32_t get_application_target_sdk_version();
 
@@ -163,7 +169,4 @@
                                       const char* permitted_when_isolated_path,
                                       android_namespace_t* parent_namespace);
 
-constexpr unsigned kLibraryAlignmentBits = 18;
-constexpr size_t kLibraryAlignment = 1UL << kLibraryAlignmentBits;
-
 #endif