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([2001:a61:2482:101:3351:6160:8173:cc31]) by smtp.gmail.com with ESMTPSA id i1sm2387292wrq.89.2020.03.26.01.12.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Mar 2020 01:12:26 -0700 (PDT) Cc: mtk.manpages@gmail.com, linux-mips@vger.kernel.org, linux-man@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] getauxval.3: MIPS, AT_BASE_PLATFORM passes ISA level To: YunQiang Su References: <20200322095527.397716-1-syq@debian.org> From: "Michael Kerrisk (man-pages)" Message-ID: <827f0ae8-2e97-5eeb-387d-275d8aac98ad@gmail.com> Date: Thu, 26 Mar 2020 09:12:23 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.6.0 MIME-Version: 1.0 In-Reply-To: <20200322095527.397716-1-syq@debian.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Hello YunQiang Su On 3/22/20 10:55 AM, YunQiang Su wrote: > Since Linux 5.7, on MIPS, we use AT_BASE_PLATFORM to pass ISA level. > The values may be: > mips2, mips3, mips4, mips5, > mips32, mips32r2, mips32r6, > mips64, mips64r2, mips64r6. > > This behavior is different with PowerPC. Thank you for the patch. I see that this is scheduled for Linux 5.7 (for which the merge window is not yet open). How certain is it that the feature will land in 5.7? Thanks, Michael > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e585b768da111f2c2d413de6214e83bbdfee8f22 > Signed-off-by: YunQiang Su > > ---- > v1 -> v2: fix typo > --- > man3/getauxval.3 | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/man3/getauxval.3 b/man3/getauxval.3 > index 456371c6a..bcc116dd2 100644 > --- a/man3/getauxval.3 > +++ b/man3/getauxval.3 > @@ -60,9 +60,10 @@ values are present on all architectures. > The base address of the program interpreter (usually, the dynamic linker). > .TP > .BR AT_BASE_PLATFORM > -A pointer to a string identifying the real platform; may differ from > -.BR AT_PLATFORM > -(PowerPC only). > +A pointer to a string (PowerPC and MIPS only). > +On PowerPC, this identifies the real platform; may differ from > +.BR AT_PLATFORM "." > +On MIPS, this identifies the ISA level (Since 5.7). > .TP > .BR AT_CLKTCK > The frequency with which > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/