Vendor import of llvm-project master 2e10b7a39b9, the last commit beforevendor/llvm-project/llvmorg-11-init-20887-g2e10b7a39b9vendor/llvm-project/master

the llvmorg-12-init tag, from which release/11.x was branched.

1 files changed, 66 insertions, 0 deletions

diff --git a/clang/lib/Headers/cet.h b/clang/lib/Headers/cet.h
new file mode 100644
index 000000000000..ffb19dec8f2b
--- /dev/null
+++ b/clang/lib/Headers/cet.h
@@ -0,0 +1,66 @@
+/*===------ cet.h -Control-flow Enforcement Technology  feature ------------===
+ * Add x86 feature with IBT and/or SHSTK bits to ELF program property if they
+ * are enabled. Otherwise, contents in this header file are unused. This file
+ * is mainly design for assembly source code which want to enable CET.
+ *
+ * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+ * See https://llvm.org/LICENSE.txt for license information.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ *
+ *===-----------------------------------------------------------------------===
+ */
+#ifndef __CET_H
+#define __CET_H
+
+#ifdef __ASSEMBLER__
+
+#ifndef __CET__
+# define _CET_ENDBR
+#endif
+
+#ifdef __CET__
+
+# ifdef __LP64__
+#  if __CET__ & 0x1
+#    define _CET_ENDBR endbr64
+#  else
+#    define _CET_ENDBR
+#  endif
+# else
+#  if __CET__ & 0x1
+#    define _CET_ENDBR endbr32
+#  else
+#    define _CET_ENDBR
+#  endif
+# endif
+
+
+#  ifdef __LP64__
+#   define __PROPERTY_ALIGN 3
+#  else
+#   define __PROPERTY_ALIGN 2
+#  endif
+
+	.pushsection ".note.gnu.property", "a"
+	.p2align __PROPERTY_ALIGN
+	.long 1f - 0f		/* name length.  */
+	.long 4f - 1f		/* data length.  */
+	/* NT_GNU_PROPERTY_TYPE_0.   */
+	.long 5			/* note type.  */
+0:
+	.asciz "GNU"		/* vendor name.  */
+1:
+	.p2align __PROPERTY_ALIGN
+	/* GNU_PROPERTY_X86_FEATURE_1_AND.  */
+	.long 0xc0000002	/* pr_type.  */
+	.long 3f - 2f		/* pr_datasz.  */
+2:
+	/* GNU_PROPERTY_X86_FEATURE_1_XXX.  */
+	.long __CET__
+3:
+	.p2align __PROPERTY_ALIGN
+4:
+	.popsection
+#endif
+#endif
+#endif