[glibc] x86-64/cet: Move dl-cet.[ch] to x86_64 directories

[glibc] x86-64/cet: Move dl-cet.[ch] to x86_64 directories

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a1bbee9fd17a84d4b550f8405d5e4d31ff24f87d

commit a1bbee9fd17a84d4b550f8405d5e4d31ff24f87d
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Tue Jan 9 12:23:25 2024 -0800

    x86-64/cet: Move dl-cet.[ch] to x86_64 directories
    
    Since CET is only enabled for x86-64, move dl-cet.[ch] to x86_64
    directories.
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/unix/sysv/linux/x86/dl-cet.h    | 63 ---------------------------------
 sysdeps/unix/sysv/linux/x86_64/dl-cet.h | 47 +++++++++++++++++++++++-
 sysdeps/{x86 => x86_64}/dl-cet.c        |  2 +-
 3 files changed, 47 insertions(+), 65 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/x86/dl-cet.h b/sysdeps/unix/sysv/linux/x86/dl-cet.h
deleted file mode 100644
index c10773ab0e..0000000000
--- a/sysdeps/unix/sysv/linux/x86/dl-cet.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/* Linux/x86 CET initializers function.
-   Copyright (C) 2018-2024 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
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sys/prctl.h>
-#include <asm/prctl.h>
-
-static __always_inline int
-dl_cet_disable_cet (unsigned int cet_feature)
-{
-  if (cet_feature != GNU_PROPERTY_X86_FEATURE_1_SHSTK)
-    return -1;
-  long long int kernel_feature = ARCH_SHSTK_SHSTK;
-  return (int) INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_DISABLE,
-				      kernel_feature);
-}
-
-static __always_inline int
-dl_cet_lock_cet (unsigned int cet_feature)
-{
-  if (cet_feature != GNU_PROPERTY_X86_FEATURE_1_SHSTK)
-    return -1;
-  /* Lock all SHSTK features.  */
-  long long int kernel_feature = -1;
-  return (int) INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_LOCK,
-				      kernel_feature);
-}
-
-static __always_inline unsigned int
-dl_cet_get_cet_status (void)
-{
-  unsigned long long kernel_feature;
-  unsigned int status = 0;
-  if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_STATUS,
-			     &kernel_feature) == 0)
-    {
-      if ((kernel_feature & ARCH_SHSTK_SHSTK) != 0)
-	status = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
-    }
-  return status;
-}
-
-/* Enable shadow stack with a macro to avoid shadow stack underflow.  */
-#define ENABLE_X86_CET(cet_feature)				\
-  if ((cet_feature & GNU_PROPERTY_X86_FEATURE_1_SHSTK))		\
-    {								\
-      long long int kernel_feature = ARCH_SHSTK_SHSTK;		\
-      INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_ENABLE,	\
-			     kernel_feature);			\
-    }
diff --git a/sysdeps/unix/sysv/linux/x86_64/dl-cet.h b/sysdeps/unix/sysv/linux/x86_64/dl-cet.h
index c89dd6bd42..94e9b9aa86 100644
--- a/sysdeps/unix/sysv/linux/x86_64/dl-cet.h
+++ b/sysdeps/unix/sysv/linux/x86_64/dl-cet.h
@@ -15,8 +15,53 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <sys/prctl.h>
+#include <asm/prctl.h>
 #include <cpu-features-offsets.h>
-#include_next <dl-cet.h>
+
+static __always_inline int
+dl_cet_disable_cet (unsigned int cet_feature)
+{
+  if (cet_feature != GNU_PROPERTY_X86_FEATURE_1_SHSTK)
+    return -1;
+  long long int kernel_feature = ARCH_SHSTK_SHSTK;
+  return (int) INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_DISABLE,
+				      kernel_feature);
+}
+
+static __always_inline int
+dl_cet_lock_cet (unsigned int cet_feature)
+{
+  if (cet_feature != GNU_PROPERTY_X86_FEATURE_1_SHSTK)
+    return -1;
+  /* Lock all SHSTK features.  */
+  long long int kernel_feature = -1;
+  return (int) INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_LOCK,
+				      kernel_feature);
+}
+
+static __always_inline unsigned int
+dl_cet_get_cet_status (void)
+{
+  unsigned long long kernel_feature;
+  unsigned int status = 0;
+  if (INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_STATUS,
+			     &kernel_feature) == 0)
+    {
+      if ((kernel_feature & ARCH_SHSTK_SHSTK) != 0)
+	status = GNU_PROPERTY_X86_FEATURE_1_SHSTK;
+    }
+  return status;
+}
+
+/* Enable shadow stack with a macro to avoid shadow stack underflow.  */
+#define ENABLE_X86_CET(cet_feature)				\
+  if ((cet_feature & GNU_PROPERTY_X86_FEATURE_1_SHSTK))		\
+    {								\
+      long long int kernel_feature = ARCH_SHSTK_SHSTK;		\
+      INTERNAL_SYSCALL_CALL (arch_prctl, ARCH_SHSTK_ENABLE,	\
+			     kernel_feature);			\
+    }
 
 #define X86_STRINGIFY_1(x)	#x
 #define X86_STRINGIFY(x)	X86_STRINGIFY_1 (x)
diff --git a/sysdeps/x86/dl-cet.c b/sysdeps/x86_64/dl-cet.c
similarity index 99%
rename from sysdeps/x86/dl-cet.c
rename to sysdeps/x86_64/dl-cet.c
index d1d42ab002..1297c09f84 100644
--- a/sysdeps/x86/dl-cet.c
+++ b/sysdeps/x86_64/dl-cet.c
@@ -1,4 +1,4 @@
-/* x86 CET initializers function.
+/* x86-64 CET initializers function.
    Copyright (C) 2018-2024 Free Software Foundation, Inc.
 
    The GNU C Library is free software; you can redistribute it and/or