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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 7F686C432BE for ; Fri, 27 Aug 2021 04:27:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A6B360F58 for ; Fri, 27 Aug 2021 04:27:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234063AbhH0E16 (ORCPT ); Fri, 27 Aug 2021 00:27:58 -0400 Received: from mengyan1223.wang ([89.208.246.23]:36706 "EHLO mengyan1223.wang" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230070AbhH0E16 (ORCPT ); Fri, 27 Aug 2021 00:27:58 -0400 Received: from localhost.localdomain (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature ECDSA (P-384)) (Client did not present a certificate) (Authenticated sender: xry111@mengyan1223.wang) by mengyan1223.wang (Postfix) with ESMTPSA id 961636618C; Fri, 27 Aug 2021 00:27:06 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mengyan1223.wang; s=mail; t=1630038429; bh=HQ5lvpjI4XUtZdLwCt9ajrrIpUohiLWau8D3VdTfHXY=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=xXcXyQOTRAghOhepy4R+uAIDJLZl3lNGYwEykybT6y3d8N6tsTezDNCrDKjdyj5LT ONTJ94Sj6tBfSTFW8F8rcUtvJ+lzICzuNnE9MFXB7yyIVcll8d+RDv8FBXxx8tGoKe J0leJcEIdK6X7obt2VPk1caPuO0IVGujoPeTk68sMmPDZUIrtcGYJ/9/3cm+Dk2qTD mUGRLaHDQTNwTi1zfQChAUWZsXPXecmolKz9y/M+I/9aYhhBXp4KM2XdeDVoBjicj5 aP+AIHGQxihoCN0ClXuF7tUo/xOBmcGWE+iw0uXEbvW6+Vv/B3ZJu5upk2iomzj9Fp GeRU/r/CFLCfQ== Message-ID: <68d81c5ef4d877456aa44cac33fe6c87afc1ec45.camel@mengyan1223.wang> Subject: Re: [PATCH 10/19] LoongArch: Add signal handling support From: Xi Ruoyao To: Huacai Chen Cc: Huacai Chen , Arnd Bergmann , Andy Lutomirski , Thomas Gleixner , Peter Zijlstra , Andrew Morton , David Airlie , Linus Torvalds , linux-arch , Xuefeng Li , Jiaxun Yang Date: Fri, 27 Aug 2021 12:27:05 +0800 In-Reply-To: References: <20210706041820.1536502-1-chenhuacai@loongson.cn> <20210706041820.1536502-11-chenhuacai@loongson.cn> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.40.4 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org On Fri, 2021-08-27 at 12:23 +0800, Huacai Chen wrote: > Hi, Ruoyao, > > On Fri, Aug 27, 2021 at 12:44 AM Xi Ruoyao > wrote: > > > > On Tue, 2021-07-06 at 12:18 +0800, Huacai Chen wrote: > > > > > +/** > > > + * struct ucontext - user context structure > > > + * @uc_flags: > > > + * @uc_link: > > > + * @uc_stack: > > > + * @uc_mcontext:       holds basic processor state > > > + * @uc_sigmask: > > > + * @uc_extcontext:     holds extended processor state > > > + */ > > > +struct ucontext { > > > +       /* Historic fields matching asm-generic */ > > > +       unsigned long           uc_flags; > > > +       struct ucontext         *uc_link; > > > +       stack_t                 uc_stack; > > > +       struct sigcontext       uc_mcontext; > > > +       sigset_t                uc_sigmask; > > > + > > > +       /* Extended context structures may follow ucontext */ > > > +       unsigned long long      uc_extcontext[0]; > > > +}; > > > + > > > +#endif /* __LOONGARCH_UAPI_ASM_UCONTEXT_H */ > > > > Hi Huacai, > > > > Maybe this is off topic, but I just seen something damn particular > > in > > your workmates' glibc repo: > > > > https://github.com/loongson/glibc/commit/86d7512949640642cdf767fb6beb077d446b2857 > > "Modify struct mcontext_t and ucontext_t layout": > The V1 of kernel patchset "match" the old, un-pulblic toolchain, and > the new public toolchain (which you have seen) adjust ucontext, and > the V2 of kernel patchset will be also update ucontext. But anyway, > thank you very much! Thanks for the explaination! I'll try to incorporate the change into my next round of system build. >