From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-3.2 required=3.0 tests=AWL,BAYES_00,BODY_8BITS, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server1.sourceware.org [209.132.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 0ACB71F45E for ; Mon, 10 Feb 2020 21:55:22 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:cc:references:from:message-id:date :mime-version:in-reply-to:content-type :content-transfer-encoding; q=dns; s=default; b=sz/Qyykdvinl4YTv SgOKHgES7Sxq1spJxUqi/JPhzIALo2k3itZfQllrBB4KeKZFgq2WwTdmpmKFdU1G Mazd9WAlrsqLOPbYuMoQlbhw8U6yBrCT2E8op7o9TgF3DAj4OeC5AvhQP2seQVk9 TNrHBWA0/deNfQ7CO7+ScjT1HfA= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:subject:to:cc:references:from:message-id:date :mime-version:in-reply-to:content-type :content-transfer-encoding; s=default; bh=ROzBLemkj/akS6lA+bmQIB M30Q8=; b=gAFdgAYMHZJM548R6EpzIv+DU4LqjHDW9KstMapD7Ec20VJovJMBKa pcKa/3tiAN+LiNIkYHzH0fUm7aFh7EnQjowTWDeCSV5DnS80zWZTAAl/4uDZUGTt x1qI9AizM335H/u1Gf4yddLIj4YDqUR1Hk9RMdTAc64VyZdiWCCiU= Received: (qmail 93145 invoked by alias); 10 Feb 2020 21:55:19 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Received: (qmail 93137 invoked by uid 89); 10 Feb 2020 21:55:18 -0000 Authentication-Results: sourceware.org; auth=none X-HELO: mail-qk1-f196.google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=subject:to:cc:references:from:autocrypt:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=NlSY/nr67eY3uZcj8QW+SPaFPx1QJkr06KpCsP280iE=; b=zIBHW6iG14BMzvxKb74K8pDu+0ycibXBqAuONWjuv/YyjVT6PNVTm5O7gHMurshQlJ KYgzk6X2sOjThJLXVZmq7TNJy1HQqdsRxVCJ6saW67Q9VrptrxBT07A+16jEV6phhnco UV1SH4s1Emx4jsn2Sf55k2/C3FgoO0aJypQTI7bFdOb2dPgfy5YAcATBgRpqRoDng2ag O0Em+QBNNLZvEBxARhmX5j3RzIKadpEsT41UOyfG0rkBDSrlHU6uFYcRqF4ks4qtFeyx p0RtbwWoSREjwxr0QtXqmH85/s7gXcmKbQcSIQj2Jv0nywOsVkktQeIyb5Yq2ysywdKC clVw== Subject: Re: [PATCH 10/15] riscv: Avoid clobbering register parameters in syscall To: Palmer Dabbelt , dj@redhat.com Cc: libc-alpha@sourceware.org References: From: Adhemerval Zanella Message-ID: <9222c3f6-7cc0-e487-6f65-1ef5686fa25a@linaro.org> Date: Mon, 10 Feb 2020 18:55:12 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit On 10/02/2020 18:27, Palmer Dabbelt wrote: > On Mon, 10 Feb 2020 11:51:05 PST (-0800), dj@redhat.com wrote: >> >> Adhemerval Zanella writes: >>>      long int _sys_result;                        \ >>> +    long int _arg0 = (long int) (arg0);                \ >>>                                      \ >>>      {                                \ >>>      register long int __a7 asm ("a7") = number;            \ >>> -    register long int __a0 asm ("a0") = (long int) (arg0);        \ >>> +    register long int __a0 asm ("a0") = _arg0;            \ >> >> Ok > > Ya, thanks -- I found this behavior super surprising.  I'm assuming you're > commiting this one (you is Adhemerval here)? Yes, this should be independent from the patchset.