From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3437C43218 for ; Sat, 27 Apr 2019 15:22:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE531206A3 for ; Sat, 27 Apr 2019 15:22:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728246AbfD0PWj (ORCPT ); Sat, 27 Apr 2019 11:22:39 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:33790 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727548AbfD0PPb (ORCPT ); Sat, 27 Apr 2019 11:15:31 -0400 Received: from [192.168.4.242] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hKP32-00014L-E5; Sat, 27 Apr 2019 16:15:28 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hKP2k-0004X0-Tb; Sat, 27 Apr 2019 16:15:10 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Richard Weinberger" , "Vineet Gupta" Date: Sat, 27 Apr 2019 16:13:09 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 107/202] arc: Use get_signal() signal_setup_done() In-Reply-To: X-SA-Exim-Connect-IP: 192.168.4.242 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.66-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Richard Weinberger commit f6dd2a3f1f8d8df640cfa2d60f85c0b818af1593 upstream. Use the more generic functions get_signal() signal_setup_done() for signal delivery. Signed-off-by: Richard Weinberger Acked-by: Vineet Gupta [bwh: Backported to 3.16 as dependency of commit 35634ffa1751 "signal: Always notice exiting tasks" - Adjust to apply after "ARC: signal handling robustify"] Signed-off-by: Ben Hutchings --- arch/arc/kernel/signal.c | 39 +++++++++++++++------------------------ 1 file changed, 15 insertions(+), 24 deletions(-) --- a/arch/arc/kernel/signal.c +++ b/arch/arc/kernel/signal.c @@ -189,14 +189,13 @@ static inline int map_sig(int sig) } static int -setup_rt_frame(int signo, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *sf; unsigned int magic = 0; int err = 0; - sf = get_sigframe(ka, regs, sizeof(struct rt_sigframe)); + sf = get_sigframe(&ksig->ka, regs, sizeof(struct rt_sigframe)); if (!sf) return 1; @@ -215,8 +214,8 @@ setup_rt_frame(int signo, struct k_sigac * #2: struct siginfo * #3: struct ucontext (completely populated) */ - if (unlikely(ka->sa.sa_flags & SA_SIGINFO)) { - err |= copy_siginfo_to_user(&sf->info, info); + if (unlikely(ksig->ka.sa.sa_flags & SA_SIGINFO)) { + err |= copy_siginfo_to_user(&sf->info, &ksig->info); err |= __put_user(0, &sf->uc.uc_flags); err |= __put_user(NULL, &sf->uc.uc_link); err |= __save_altstack(&sf->uc.uc_stack, regs->sp); @@ -237,19 +236,19 @@ setup_rt_frame(int signo, struct k_sigac return err; /* #1 arg to the user Signal handler */ - regs->r0 = map_sig(signo); + regs->r0 = map_sig(ksig->sig); /* setup PC of user space signal handler */ - regs->ret = (unsigned long)ka->sa.sa_handler; + regs->ret = (unsigned long)ksig->ka.sa.sa_handler; /* * handler returns using sigreturn stub provided already by userpsace * If not, nuke the process right away */ - if(!(ka->sa.sa_flags & SA_RESTORER)) + if(!(ksig->ka.sa.sa_flags & SA_RESTORER)) return 1; - regs->blink = (unsigned long)ka->sa.sa_restorer; + regs->blink = (unsigned long)ksig->ka.sa.sa_restorer; /* User Stack for signal handler will be above the frame just carved */ regs->sp = (unsigned long)sf; @@ -311,38 +310,30 @@ static void arc_restart_syscall(struct k * OK, we're invoking a handler */ static void -handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, - struct pt_regs *regs) +handle_signal(struct ksignal *ksig, struct pt_regs *regs) { sigset_t *oldset = sigmask_to_save(); int failed; /* Set up the stack frame */ - failed = setup_rt_frame(sig, ka, info, oldset, regs); + failed = setup_rt_frame(ksig, oldset, regs); - if (failed) - force_sigsegv(sig, current); - else - signal_delivered(sig, info, ka, regs, 0); + signal_setup_done(failed, ksig, 0); } void do_signal(struct pt_regs *regs) { - struct k_sigaction ka; - siginfo_t info; - int signr; + struct ksignal ksig; int restart_scall; - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - restart_scall = in_syscall(regs) && syscall_restartable(regs); - if (signr > 0) { + if (get_signal(&ksig)) { if (restart_scall) { - arc_restart_syscall(&ka, regs); + arc_restart_syscall(&ksig.ka, regs); syscall_wont_restart(regs); /* No more restarts */ } - handle_signal(signr, &ka, &info, regs); + handle_signal(&ksig, regs); return; }