1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/x86/dl-cet.h b/sysdeps/unix/sysv/linux/x86/dl-cet.h
new file mode 100644
index 0000000000..3fbcfebed5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86/dl-cet.h
@@ -0,0 +1,55 @@
+/* Linux/x86 CET initializers function.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   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 <sys/prctl.h>
+#include <asm/prctl.h>
+
+static inline int __attribute__ ((always_inline))
+dl_cet_allocate_legacy_bitmap (unsigned long *legacy_bitmap)
+{
+  /* Allocate legacy bitmap.  */
+  INTERNAL_SYSCALL_DECL (err);
+#ifdef __LP64__
+  return (int) INTERNAL_SYSCALL (arch_prctl, err, 2,
+				 ARCH_CET_LEGACY_BITMAP, legacy_bitmap);
+#else
+  unsigned long long legacy_bitmap_u64[2];
+  int res = INTERNAL_SYSCALL (arch_prctl, err, 2,
+			      ARCH_CET_LEGACY_BITMAP, legacy_bitmap_u64);
+  if (res == 0)
+    {
+      legacy_bitmap[0] = legacy_bitmap_u64[0];
+      legacy_bitmap[1] = legacy_bitmap_u64[1];
+    }
+  return res;
+#endif
+}
+
+static inline int __attribute__ ((always_inline))
+dl_cet_disable_cet (unsigned int cet_feature)
+{
+  INTERNAL_SYSCALL_DECL (err);
+  return (int) INTERNAL_SYSCALL (arch_prctl, err, 2, ARCH_CET_DISABLE,
+				 cet_feature);
+}
+
+static inline int __attribute__ ((always_inline))
+dl_cet_lock_cet (void)
+{
+  INTERNAL_SYSCALL_DECL (err);
+  return (int) INTERNAL_SYSCALL (arch_prctl, err, 2, ARCH_CET_LOCK, 0);
+}