Attachment 144902 Details for Bug 207850 – Patch to fix FPSCR handling on ppc64 kernels

[patch] Patch to fix FPSCR handling on ppc64 kernels

linux-2.6.9-ppc64-signal-fpscr.patch (text/plain), 1.71 KB, created by David Howells on 2007-01-05 13:20:39 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: David Howells

Created: 2007-01-05 13:20:39 UTC

Size: 1.71 KB

patch

obsolete

>--- linux-2.6.9/arch/ppc64/kernel/signal.c.orig	2007-01-05 11:00:38.000000000 +0000
>+++ linux-2.6.9/arch/ppc64/kernel/signal.c	2007-01-05 11:03:24.000000000 +0000
>@@ -133,9 +133,6 @@ static long setup_sigcontext(struct sigc
> 
> 	flush_fp_to_thread(current);
> 
>-	/* Make sure signal doesn't get spurrious FP exceptions */
>-	current->thread.fpscr = 0;
>-
> #ifdef CONFIG_ALTIVEC
> 	err |= __put_user(v_regs, &sc->v_regs);
> 
>@@ -414,6 +411,9 @@ static void setup_rt_frame(int signr, st
> 	if (err)
> 		goto badframe;
> 
>+	/* Make sure signal handler doesn't get spurious FP exceptions */
>+	current->thread.fpscr = 0;
>+
> 	/* Set up to return from userspace. */
> 	err |= setup_trampoline(__NR_rt_sigreturn, &frame->tramp[0]);
> 	if (err)
>--- linux-2.6.9/arch/ppc64/kernel/signal32.c.orig	2007-01-05 10:50:14.000000000 +0000
>+++ linux-2.6.9/arch/ppc64/kernel/signal32.c	2007-01-05 11:06:43.000000000 +0000
>@@ -143,8 +143,6 @@ static int save_user_regs(struct pt_regs
> 	if (err)
> 		return 1;
> 
>-	current->thread.fpscr = 0;	/* turn off all fp exceptions */
>-
> #ifdef CONFIG_ALTIVEC
> 	/* save altivec registers */
> 	if (current->thread.used_vr) {
>@@ -685,6 +683,8 @@ static void handle_rt_signal32(unsigned 
> 	if (save_user_regs(regs, frame, __NR_rt_sigreturn))
> 		goto badframe;
> 
>+	current->thread.fpscr = 0;	/* turn off all fp exceptions */
>+
> 	if (put_user(regs->gpr[1], (u32 __user *)newsp))
> 		goto badframe;
> 	regs->gpr[1] = (unsigned long) newsp;
>@@ -853,6 +853,8 @@ static void handle_signal32(unsigned lon
> 	if (save_user_regs(regs, &frame->mctx, __NR_sigreturn))
> 		goto badframe;
> 
>+	current->thread.fpscr = 0;	/* turn off all fp exceptions */
>+
> 	if (put_user(regs->gpr[1], (u32 __user *)newsp))
> 		goto badframe;
> 	regs->gpr[1] = (unsigned long) newsp;

Actions: View | Diff

Attachments on bug 207850: 144902