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[PATCH 1/6] Split x86_64 out of main Linux kernel-features.h


This patch splits x86_64 out of the main Linux kernel-features.h.

Tested x86_64 that there are no changes to disassembly of installed
shared libraries.

2014-06-24  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/unix/sysv/linux/x86_64/kernel-features.h: New file.
	* sysdeps/unix/sysv/linux/kernel-features.h [__x86_64__]
	(__ASSUME_ACCEPT4_SYSCALL): Do not define.
	[__LINUX_KERNEL_VERSION >= 0x020621 && __x86_64__]
	(__ASSUME_RECVMMSG_SYSCALL): Likewise.
	[__LINUX_KERNEL_VERSION >= 0x030000 && __x86_64__]
	(__ASSUME_SENDMMSG_SYSCALL): Likewise.
	[__x86_64__ && __LINUX_KERNEL_VERSION >= 0x030100]
	(__ASSUME_GETCPU_SYSCALL): Likewise.

diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h
index 665c348..3592671 100644
--- a/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/kernel-features.h
@@ -137,7 +137,7 @@
 
 /* The accept4 syscall was added for x86_64 and SPARC in 2.6.28, and
    for PowerPC and SH in 2.6.37.  */
-#if (defined __x86_64__ || defined __sparc__)		\
+#if defined __sparc__					\
     || (__LINUX_KERNEL_VERSION >= 0x020625		\
 	&& (defined __powerpc__ || defined __sh__))
 # define __ASSUME_ACCEPT4_SYSCALL	1
@@ -173,7 +173,7 @@
 /* The recvmmsg syscall was added for i386, x86_64 and SPARC in
    2.6.33, and for PowerPC and SH in 2.6.37.  */
 #if (__LINUX_KERNEL_VERSION >= 0x020621			\
-     && (defined __i386__ || defined __x86_64__ || defined __sparc__))	\
+     && (defined __i386__ || defined __sparc__))	\
     || (__LINUX_KERNEL_VERSION >= 0x020625		\
 	&& (defined __powerpc__ || defined __sh__))
 # define __ASSUME_RECVMMSG_SYSCALL	1
@@ -210,8 +210,8 @@
 
 /* The sendmmsg syscall was added for i386, x86_64, PowerPC, SH and
    SPARC in 3.0.  */
-#if __LINUX_KERNEL_VERSION >= 0x030000					\
-    && (defined __i386__ || defined __x86_64__ || defined __powerpc__	\
+#if __LINUX_KERNEL_VERSION >= 0x030000		\
+    && (defined __i386__ || defined __powerpc__	\
 	|| defined __sh__ || defined __sparc__)
 # define __ASSUME_SENDMMSG_SYSCALL	1
 #endif
@@ -223,8 +223,3 @@
 #if defined __ASSUME_SENDMMSG_SOCKETCALL || defined __ASSUME_SENDMMSG_SYSCALL
 # define __ASSUME_SENDMMSG	1
 #endif
-
-/* getcpu is a syscall for x86-64 since 3.1.  */
-#if defined __x86_64__ && __LINUX_KERNEL_VERSION >= 0x030100
-# define __ASSUME_GETCPU_SYSCALL	1
-#endif
diff --git a/sysdeps/unix/sysv/linux/x86_64/kernel-features.h b/sysdeps/unix/sysv/linux/x86_64/kernel-features.h
new file mode 100644
index 0000000..d4c44d2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/kernel-features.h
@@ -0,0 +1,38 @@
+/* Set flags signalling availability of kernel features based on given
+   kernel version number.  x86_64 version.
+   Copyright (C) 1999-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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/>.  */
+
+/* The accept4 syscall was added for x86_64 in 2.6.28.  */
+#define __ASSUME_ACCEPT4_SYSCALL	1
+
+/* The recvmmsg syscall was added for x86_64 in 2.6.33.  */
+#if __LINUX_KERNEL_VERSION >= 0x020621
+# define __ASSUME_RECVMMSG_SYSCALL	1
+#endif
+
+/* The sendmmsg syscall was added for x86_64 in 3.0.  */
+#if __LINUX_KERNEL_VERSION >= 0x030000
+# define __ASSUME_SENDMMSG_SYSCALL	1
+#endif
+
+/* getcpu is a syscall for x86-64 since 3.1.  */
+#if __LINUX_KERNEL_VERSION >= 0x030100
+# define __ASSUME_GETCPU_SYSCALL	1
+#endif
+
+#include_next <kernel-features.h>

-- 
Joseph S. Myers
joseph@codesourcery.com


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