--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/i386/cet.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,76 @@
+/* Functions for CET/x86.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "output.h"
+#include "linux-common.h"
+
+void
+file_end_indicate_exec_stack_and_cet (void)
+{
+  file_end_indicate_exec_stack ();
+
+  if (flag_cf_protection == CF_NONE)
+    return;
+
+  unsigned int feature_1 = 0;
+
+  if (TARGET_IBT)
+    /* GNU_PROPERTY_X86_FEATURE_1_IBT.  */
+    feature_1 |= 0x1;
+
+  if (TARGET_SHSTK)
+    /* GNU_PROPERTY_X86_FEATURE_1_SHSTK.  */
+    feature_1 |= 0x2;
+
+  if (feature_1)
+    {
+      int p2align = ptr_mode == SImode ? 2 : 3;
+
+      /* Generate GNU_PROPERTY_X86_FEATURE_1_XXX.  */
+      switch_to_section (get_section (".note.gnu.property",
+				      SECTION_NOTYPE, NULL));
+
+      ASM_OUTPUT_ALIGN (asm_out_file, p2align);
+      /* name length.  */
+      fprintf (asm_out_file, ASM_LONG " 1f - 0f\n");
+      /* data length.  */
+      fprintf (asm_out_file, ASM_LONG " 4f - 1f\n");
+      /* note type: NT_GNU_PROPERTY_TYPE_0.  */
+      fprintf (asm_out_file, ASM_LONG " 5\n");
+      ASM_OUTPUT_LABEL (asm_out_file, "0");
+      /* vendor name: "GNU".  */
+      fprintf (asm_out_file, STRING_ASM_OP " \"GNU\"\n");
+      ASM_OUTPUT_LABEL (asm_out_file, "1");
+      ASM_OUTPUT_ALIGN (asm_out_file, p2align);
+      /* pr_type: GNU_PROPERTY_X86_FEATURE_1_AND.  */
+      fprintf (asm_out_file, ASM_LONG " 0xc0000002\n");
+      /* pr_datasz.  */\
+      fprintf (asm_out_file, ASM_LONG " 3f - 2f\n");
+      ASM_OUTPUT_LABEL (asm_out_file, "2");
+      /* GNU_PROPERTY_X86_FEATURE_1_XXX.  */
+      fprintf (asm_out_file, ASM_LONG " 0x%x\n", feature_1);
+      ASM_OUTPUT_LABEL (asm_out_file, "3");
+      ASM_OUTPUT_ALIGN (asm_out_file, p2align);
+      ASM_OUTPUT_LABEL (asm_out_file, "4");
+    }
+}