1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/nacl/nacl_interface_query.c b/sysdeps/nacl/nacl_interface_query.c
new file mode 100644
index 0000000000..cae876b3b8
--- /dev/null
+++ b/sysdeps/nacl/nacl_interface_query.c
@@ -0,0 +1,49 @@
+/* NaCl function exposing IRT interface query.
+   Copyright (C) 2015 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <nacl-interfaces.h>
+#include <ldsodefs.h>
+
+#ifdef SHARED
+
+/* We can define this trivially using IFUNC rather than a wrapper
+   because we absolutely require that we get the IRT interface query
+   function pointer via AT_SYSINFO.  */
+
+extern TYPE_nacl_irt_query nacl_interface_query_ifunc (void)
+  asm ("nacl_interface_query");
+
+TYPE_nacl_irt_query
+nacl_interface_query_ifunc (void)
+{
+  return &__nacl_irt_query;
+}
+asm (".type nacl_interface_query, %gnu_indirect_function");
+
+#else
+
+/* In the static library, using IFUNC is just extra overhead.  */
+
+size_t
+nacl_interface_query (const char *interface_ident,
+                      void *table, size_t tablesize)
+{
+  return __nacl_irt_query (interface_ident, table, tablesize);
+}
+
+#endif