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[82.69.66.36]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4395a058930sm20853795e9.17.2025.02.12.05.59.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Feb 2025 05:59:20 -0800 (PST) Date: Wed, 12 Feb 2025 13:59:19 +0000 From: David Laight To: "Arnd Bergmann" Cc: "Ian Rogers" , "Arnaldo Carvalho de Melo" , "Howard Chu" , "Peter Zijlstra" , "Ingo Molnar" , "Namhyung Kim" , "Mark Rutland" , "Alexander Shishkin" , "Jiri Olsa" , "Adrian Hunter" , "Kan Liang" , "John Garry" , "Will Deacon" , "James Clark" , "Mike Leach" , "Leo Yan" , guoren , "Paul Walmsley" , "Palmer Dabbelt" , "Albert Ou" , "Charlie Jenkins" , "Bibo Mao" , "Huacai Chen" , "Catalin Marinas" , "Jiri Slaby" , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "linux-csky@vger.kernel.org" , linux-riscv@lists.infradead.org Subject: Re: [PATCH v2 5/7] perf trace beauty: Add syscalltbl.sh generating all system call tables Message-ID: <20250212135919.4e7a26fd@pumpkin> In-Reply-To: <0195f9a0-5198-4ee0-b4ff-ea7126dc8299@app.fastmail.com> References: <20250210165108.95894-1-irogers@google.com> <20250210165108.95894-6-irogers@google.com> <0195f9a0-5198-4ee0-b4ff-ea7126dc8299@app.fastmail.com> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250212_055923_498540_2CF42720 X-CRM114-Status: GOOD ( 10.36 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 11 Feb 2025 18:53:14 +0100 "Arnd Bergmann" wrote: ... > I think the way it actually works on mips is that all syscalls are > allowed in any task and the actual number identifies both the > ABI and the syscall. In some variant, the same is true on arm > (oabi/eabi) and x86-64 (64/x32), but oabi and x32 are both too > obsolete to put much work into them. IIRC x86-64 processes can also just make i386 system calls. Even switching to/from 64bit mode isn't privileged. David