[tip:x86/mm] compiler-gcc.h: Introduce __nostackprotector function attribute

Path	csiph.com!aioe.org!bofh.it!news.nic.it!robomod
From	tip-bot for Tom Lendacky <tipbot@zytor.com>
Newsgroups	linux.kernel
Subject	[tip:x86/mm] compiler-gcc.h: Introduce __nostackprotector function attribute
Date	Tue, 18 Jul 2017 20:40:01 +0200
Message-ID	<u4Fzz-5V2-5@gated-at.bofh.it> (permalink)
References	<u4x91-CI-43@gated-at.bofh.it>
X-Original-To	linux-tip-commits@vger.kernel.org
Reply-To	arnd@arndb.de, matt@codeblueprint.co.uk, torvalds@linux-foundation.org, luto@kernel.org, riel@redhat.com, pbonzini@redhat.com, mingo@kernel.org, mst@redhat.com, hpa@zytor.com, dyoung@redhat.com, bp@alien8.de, rkrcmar@redhat.com, konrad.wilk@oracle.com, toshi.kani@hpe.com, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, glider@google.com, dvyukov@google.com, lwoodman@redhat.com, tglx@linutronix.de, aryabinin@virtuozzo.com, brijesh.singh@amd.com, corbet@lwn.net, peterz@infradead.org
Git-Commit-ID	7375ae3a0b79ea072f4c672039f08f5db633b9e1
X-Mailer	tip-git-log-daemon
Robot-ID	<tip-bot.git.kernel.org>
Robot-Unsubscribe	Contact <mailto:hpa@kernel.org> to get blacklisted from these emails
MIME-Version	1.0
Content-Transfer-Encoding	8bit
Content-Type	text/plain; charset=UTF-8
Content-Disposition	inline
Sender	robomod@news.nic.it
List-ID	<linux-kernel.vger.kernel.org>
X-Mailing-List	linux-kernel@vger.kernel.org
Approved	robomod@news.nic.it
Lines	74
Organization	linux.* mail to news gateway
X-Original-Cc	lwoodman@redhat.com, glider@google.com, dvyukov@google.com, peterz@infradead.org, aryabinin@virtuozzo.com, brijesh.singh@amd.com, corbet@lwn.net, tglx@linutronix.de, hpa@zytor.com, mst@redhat.com, bp@alien8.de, dyoung@redhat.com, mingo@kernel.org, pbonzini@redhat.com, torvalds@linux-foundation.org, riel@redhat.com, luto@kernel.org, arnd@arndb.de, matt@codeblueprint.co.uk, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, konrad.wilk@oracle.com, toshi.kani@hpe.com, rkrcmar@redhat.com
X-Original-Date	Tue, 18 Jul 2017 11:27:55 -0700
X-Original-Message-ID	<tip-7375ae3a0b79ea072f4c672039f08f5db633b9e1@git.kernel.org>
X-Original-References	<0576fd5c74440ad0250f16ac6609ecf587812456.1500319216.git.thomas.lendacky@amd.com>
X-Original-Sender	linux-kernel-owner@vger.kernel.org
Xref	csiph.com linux.kernel:1690554

Show key headers only | View raw

Commit-ID:  7375ae3a0b79ea072f4c672039f08f5db633b9e1
Gitweb:     http://git.kernel.org/tip/7375ae3a0b79ea072f4c672039f08f5db633b9e1
Author:     Tom Lendacky <thomas.lendacky@amd.com>
AuthorDate: Mon, 17 Jul 2017 16:10:34 -0500
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 18 Jul 2017 20:23:20 +0200

compiler-gcc.h: Introduce __nostackprotector function attribute

Create a new function attribute, __nostackprotector, that can used to turn off
stack protection on a per function basis.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Toshimitsu Kani <toshi.kani@hpe.com>
Cc: kasan-dev@googlegroups.com
Cc: kvm@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/0576fd5c74440ad0250f16ac6609ecf587812456.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 include/linux/compiler-gcc.h | 2 ++
 include/linux/compiler.h     | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index cd4bbe8..c28cedd 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -166,6 +166,8 @@
 
 #if GCC_VERSION >= 40100
 # define __compiletime_object_size(obj) __builtin_object_size(obj, 0)
+
+#define __nostackprotector	__attribute__((__optimize__("no-stack-protector")))
 #endif
 
 #if GCC_VERSION >= 40300
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 219f82f..3f8c88e 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -470,6 +470,10 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
 #define __visible
 #endif
 
+#ifndef __nostackprotector
+# define __nostackprotector
+#endif
+
 /*
  * Assume alignment of return value.
  */

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

[tip:x86/mm] compiler-gcc.h: Introduce __nostackprotector function  attribute tip-bot for Tom Lendacky <tipbot@zytor.com> - 2017-07-18 20:40 +0200

csiph-web