From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-3.4 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL autolearn=ham autolearn_force=no version=3.4.2 Received: (qmail 30515 invoked from network); 22 Apr 2020 07:33:53 -0000 Received: from mother.openwall.net (195.42.179.200) by inbox.vuxu.org with UTF8ESMTPZ; 22 Apr 2020 07:33:53 -0000 Received: (qmail 13667 invoked by uid 550); 22 Apr 2020 07:33:51 -0000 Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Reply-To: musl@lists.openwall.com Received: (qmail 13640 invoked from network); 22 Apr 2020 07:33:50 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:subject:to:cc:references:in-reply-to:mime-version :message-id:content-transfer-encoding; bh=oGcRKkgkVr4JcI1ibH9gwtLZOypiwzpP4gH9dSaU7iQ=; b=hdIN63OsFGxhd5ipGu4ysZTGX8oyPNhB+PjKGiRBkP0qpRbvyu+72iyJRPYJ83m3mL zL/BRO1HfL5WuAHmFV6ajhMbSCup8Q/39Am9KyTc5XkhCMCTzmgbrSGqQj/+RBtCxvn0 glrFXDGBaM1Fhpd3VeIquTcTOTmUkQKDB+Wu7ftzfczaUriHEHRU6PHbgSfbqwuapwhy yMZ5Hi8QcV1p+KlumN1chA4AzMzO6R3aTrFrrJECb+blzfTUXUWFedFdHAkYK3TNjinA IoAXJzILlpepKL/e84ywiJKQ71QcP6tdYKdKObS+DQ/Swnm7/7B+38zIrHmze4+4KQK0 4qyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:subject:to:cc:references:in-reply-to :mime-version:message-id:content-transfer-encoding; bh=oGcRKkgkVr4JcI1ibH9gwtLZOypiwzpP4gH9dSaU7iQ=; b=KtXbt8kFe0oLdvsmZMAkpk9YVemd9oHHO0BXITlXrUUi3VYOON4ijaAIzV5GCEcgiV dGfPKwLSIQxwr7UsRj2SIggJsqAKP34CgZgl8kaRANoyDTQYpVRzQCBZg0WI7ZFJq3Jj WJs24l87Hq/GlmSuXLMRDHiLNZ/tKE+ZbnAeOvMQRK3KqyVJnU4bbUsXO/U9nMBCbKdm Mb/aodJ+RB+XlfUqyXBCeanXP0w2gtiNu1S5P8c4V4sxn/pa0Fszj9kUgUl8czI/fAj9 QP2gGh4kO1G3VcDcAySAIOt2vYzQh7JlNkw9oO9KE/GOSFFbA81T8i0u/DcpoCp/xdbz 5ieg== X-Gm-Message-State: AGi0PuZlwgule+b1vFungIs6g7eLV9iE/iXNK8XhjqDMezWKcPSTDw9x BtQIy1YgbpGIfN8MHFB0jxI= X-Google-Smtp-Source: APiQypIn1uMRP3SnZ423g+QJntQbuuVv7pdNNC5Eob68blIs9swJ39ifzY1cOI/a2YG9MS0NijIB+g== X-Received: by 2002:a62:25c6:: with SMTP id l189mr26325614pfl.28.1587540818374; Wed, 22 Apr 2020 00:33:38 -0700 (PDT) Date: Wed, 22 Apr 2020 17:31:07 +1000 From: Nicholas Piggin To: Florian Weimer Cc: Adhemerval Zanella , Rich Felker , David Laight , "libc-alpha@sourceware.org" , "libc-dev@lists.llvm.org" , "linuxppc-dev@lists.ozlabs.org" , musl@lists.openwall.com, Segher Boessenkool References: <1586931450.ub4c8cq8dj.astroid@bobo.none> <20200415225539.GL11469@brightrain.aerifal.cx> <20200416153756.GU11469@brightrain.aerifal.cx> <4b2a7a56-dd2b-1863-50e5-2f4cdbeef47c@linaro.org> <20200416175932.GZ11469@brightrain.aerifal.cx> <4f824a37-e660-8912-25aa-fde88d4b79f3@linaro.org> <20200416183151.GA11469@brightrain.aerifal.cx> <1587344003.daumxvs1kh.astroid@bobo.none> <20200421143941.GJ11469@brightrain.aerifal.cx> <960127e0-57a0-55b4-f309-ae0a675c7756@linaro.org> <1587536988.ivnp421w2w.astroid@bobo.none> <874ktcng8z.fsf@mid.deneb.enyo.de> In-Reply-To: <874ktcng8z.fsf@mid.deneb.enyo.de> MIME-Version: 1.0 Message-Id: <1587540390.vde84z8edw.astroid@bobo.none> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [musl] Re: Powerpc Linux 'scv' system call ABI proposal take 2 Excerpts from Florian Weimer's message of April 22, 2020 5:15 pm: > * Nicholas Piggin: >=20 >> Another option would be to use a different signal. I don't see that any=20 >> are more suitable. >=20 > SIGSYS comes to my mind. But I don't know how exclusively it is > associated with seccomp these days. SIGSYS is entirely seccomp now. There looks like a single obscure MIPS=20 user of it in Linux that's not seccomp, but it would be entirely new for=20 powerpc (or any of the common platforms, arm, x86 etc). So I would be disinclined to use SIGSYS unless there are no other better=20 signal types, and we don't want to use SIGILL for some good reason -- is=20 there a good reason to add complexity for userspace by differentiating=20 these two situations? Thanks, Nick