linux-kernel - [PATCH] x86_32, entry: use syscall_badsys from syscall_trace

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Date:	Sun, 20 Jul 2014 23:51:52 +0200 (CEST)
From:	Sven Wegener <sven.wegener@...aler.net>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	X86 ML <x86@...nel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: [PATCH] x86_32, entry: use syscall_badsys from syscall_trace_entry

Bring syscall_trace_entry in line with the other syscall_* error
handling code and use syscall_badsys for setting -ENOSYS.

Signed-off-by: Sven Wegener <sven.wegener@...aler.net>
---
 arch/x86/kernel/entry_32.S | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 0d0c9d4..793f6c9 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -644,13 +644,12 @@ END(work_pending)
 	# perform syscall exit tracing
 	ALIGN
 syscall_trace_entry:
-	movl $-ENOSYS,PT_EAX(%esp)
 	movl %esp, %eax
 	call syscall_trace_enter
 	/* What it returned is what we'll actually use.  */
 	cmpl $(NR_syscalls), %eax
-	jnae syscall_call
-	jmp syscall_exit
+	jae syscall_badsys
+	jmp syscall_call
 END(syscall_trace_entry)
 
 	# perform syscall exit tracing
--
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