linux-kernel - [PATCH v3 1/8] seccomp: allow COMPAT sigreturn overrides

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Message-Id: <1425518828-16017-2-git-send-email-keescook@chromium.org>
Date:	Wed,  4 Mar 2015 17:27:01 -0800
From:	Kees Cook <keescook@...omium.org>
To:	akpm@...ux-foundation.org
Cc:	Kees Cook <keescook@...omium.org>, Ingo Molnar <mingo@...hat.com>,
	Russell King <linux@....linux.org.uk>,
	Michal Simek <monstr@...str.eu>,
	Ralf Baechle <ralf@...ux-mips.org>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	"David S. Miller" <davem@...emloft.net>, x86@...nel.org,
	Arnd Bergmann <arnd@...db.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Will Deacon <will.deacon@....com>,
	Daniel Borkmann <dborkman@...hat.com>,
	Laura Abbott <lauraa@...eaurora.org>,
	James Hogan <james.hogan@...tec.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-mips@...ux-mips.org, linux-parisc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org,
	linux-arch@...r.kernel.org
Subject: [PATCH v3 1/8] seccomp: allow COMPAT sigreturn overrides

Some architectures may need to override the compat sigreturn definition,
as is already possible in the non-compat case.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 include/asm-generic/seccomp.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/asm-generic/seccomp.h b/include/asm-generic/seccomp.h
index 9fa1f653ed3b..c9ccafa0d99a 100644
--- a/include/asm-generic/seccomp.h
+++ b/include/asm-generic/seccomp.h
@@ -17,7 +17,9 @@
 #define __NR_seccomp_read_32		__NR_read
 #define __NR_seccomp_write_32		__NR_write
 #define __NR_seccomp_exit_32		__NR_exit
+#ifndef __NR_seccomp_sigreturn_32
 #define __NR_seccomp_sigreturn_32	__NR_rt_sigreturn
+#endif
 #endif /* CONFIG_COMPAT && ! already defined */
 
 #define __NR_seccomp_read		__NR_read
-- 
1.9.1

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