linux-kernel - [PATCH 02/12] x86: add arch_compat_syscall

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Date:	Fri, 26 Feb 2010 16:37:05 -0500
From:	Jason Baron <jbaron@...hat.com>
To:	fweisbec@...il.com, mingo@...e.hu, rostedt@...dmis.org
Cc:	linux-kernel@...r.kernel.org, laijs@...fujitsu.com,
	lizf@...fujitsu.com, hpa@...or.com, tglx@...utronix.de,
	mhiramat@...hat.com, heiko.carstens@...ibm.com,
	benh@...nel.crashing.org, davem@...emloft.net, lethal@...ux-sh.org,
	schwidefsky@...ibm.com, brueckner@...ux.vnet.ibm.com,
	tony.luck@...el.com
Subject: [PATCH 02/12] x86: add arch_compat_syscall_addr()

Add arch_compat_syscall_addr(int nr) for x86_64. This is in preparation for adding
compat syscall support to the event tracer.

Signed-off-by: Jason Baron <jbaron@...hat.com>
---
 arch/x86/kernel/ftrace.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index cd37469..3ee2f46 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -510,3 +510,14 @@ void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr,
 	}
 }
 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+#ifdef CONFIG_FTRACE_SYSCALLS
+extern unsigned long *ia32_sys_call_table;
+
+#ifdef CONFIG_COMPAT
+unsigned long __init arch_compat_syscall_addr(int nr)
+{
+	return (unsigned long)(&ia32_sys_call_table)[nr];
+}
+#endif
+#endif
-- 
1.6.5.1

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