Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934303AbcJaQZ4 (ORCPT ); Mon, 31 Oct 2016 12:25:56 -0400 Received: from mailapp01.imgtec.com ([195.59.15.196]:60375 "EHLO mailapp01.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933737AbcJaQZy (ORCPT ); Mon, 31 Oct 2016 12:25:54 -0400 Date: Mon, 31 Oct 2016 16:25:44 +0000 From: "Maciej W. Rozycki" To: Ralf Baechle CC: , Subject: [PATCH 1/4] MIPS: Fix ISA I FP sigcontext access violation handling In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [10.20.78.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1021 Lines: 27 Complement commit 0ae8dceaebe3 ("Merge with 2.3.10.") and use the local `fault' handler to recover from FP sigcontext access violation faults, like corresponding code does in r4k_fpu.S. The `bad_stack' handler is in syscall.c and is not suitable here as we want to propagate the error condition up through the caller rather than killing the thread outright. Signed-off-by: Maciej W. Rozycki --- I guess it hardly ever triggers and code still builds, so it has aged so well... Maciej linux-mips-isa1-sig-fp-context-fault.patch Index: linux-sfr-test/arch/mips/kernel/r2300_fpu.S =================================================================== --- linux-sfr-test.orig/arch/mips/kernel/r2300_fpu.S 2016-10-22 02:36:46.000000000 +0100 +++ linux-sfr-test/arch/mips/kernel/r2300_fpu.S 2016-10-22 02:37:20.891186000 +0100 @@ -21,7 +21,7 @@ #define EX(a,b) \ 9: a,##b; \ .section __ex_table,"a"; \ - PTR 9b,bad_stack; \ + PTR 9b,fault; \ .previous .set noreorder