ld.so: Add architecture specific fields

To support Intel Control-flow Enforcement Technology (CET) run-time
control:

1. An architecture specific field in the writable ld.so namespace is
needed to indicate if CET features are enabled at run-time.
2. An architecture specific field in struct link_map is needed if
CET features are enabled in an ELF module.

This patch adds dl-procruntime.c to the writable ld.so namespace and
link_map.h to struct link_map.

Tested with build-many-glibcs.py.

	* elf/dl-support.c: Include <dl-procruntime.c>.
	* include/link.h: Include <link_map.h>.
	* sysdeps/generic/dl-procruntime.c: New file.
	* sysdeps/generic/link_map.h: Likewise.
	* sysdeps/generic/ldsodefs.h: Include <dl-procruntime.c> in
	the writable ld.so namespace.

1 files changed, 2 insertions, 0 deletions

diff --git a/include/link.h b/include/link.h
index 3e1b2aefb7..82b77a6b41 100644
--- a/include/link.h
+++ b/include/link.h
@@ -203,6 +203,8 @@ struct link_map
 				       freed, ie. not allocated with
 				       the dummy malloc in ld.so.  */
 
+#include <link_map.h>
+
     /* Collected information about own RPATH directories.  */
     struct r_search_path_struct l_rpath_dirs;