linux-kernel - [PATCH 2/4] x86: ia32_signal: do save_i387_xstate_ia32 at get

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Message-ID: <49125756.70201@ct.jp.nec.com>
Date:	Wed, 05 Nov 2008 18:32:54 -0800
From:	Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 2/4] x86: ia32_signal: do save_i387_xstate_ia32 at get_sigframe()

From: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>

move calling save_i387_xstate_ia32() into get_sigframe() from
setup_sigcontext().

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@...jp.nec.com>
---
 arch/x86/ia32/ia32_signal.c |    9 +++------
 1 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index e82ebd6..bafc0b4 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -367,12 +367,7 @@ static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
 	err |= __put_user(regs->flags, &sc->flags);
 	err |= __put_user(regs->sp, &sc->sp_at_signal);
 
-	tmp = save_i387_xstate_ia32(fpstate);
-	if (tmp < 0)
-		err = -EFAULT;
-	else
-		err |= __put_user(ptr_to_compat(tmp ? fpstate : NULL),
-					&sc->fpstate);
+	err |= __put_user(ptr_to_compat(fpstate), &sc->fpstate);
 
 	/* non-iBCS2 extensions.. */
 	err |= __put_user(mask, &sc->oldmask);
@@ -408,6 +403,8 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
 	if (used_math()) {
 		sp = sp - sig_xstate_ia32_size;
 		*fpstate = (struct _fpstate_ia32 *) sp;
+		if (save_i387_xstate_ia32(*fpstate) < 0)
+			return (void __user *) -1L;
 	}
 
 	sp -= frame_size;
-- 
1.5.6

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