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Thu, 27 Jun 2024 02:35:40 -0700 (PDT) Received: from [127.0.0.1] ([212.107.28.57]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1faac979f54sm9033675ad.153.2024.06.27.02.35.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Jun 2024 02:35:39 -0700 (PDT) From: Celeste Liu X-Google-Original-From: Celeste Liu Message-ID: <8fb8d780-9e42-438d-88d5-8fe1495cf4d2@gmail.com> Date: Thu, 27 Jun 2024 17:35:34 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5] riscv: entry: set a0 = -ENOSYS only when syscall != -1 Content-Language: en-GB-large To: Andreas Schwab Cc: "Dmitry V. Levin" , Palmer Dabbelt , Paul Walmsley , Albert Ou , Guo Ren , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , Conor Dooley , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Laight , Felix Yan , Ruizhe Pan , Shiqi Zhang , Emil Renner Berthing , "Ivan A. Melnikov" References: <20230801141607.435192-1-CoelacanthusHex@gmail.com> <20240627071422.GA2626@altlinux.org> <9c102328-6bb3-46b6-bc2f-d011a284d5b0@gmail.com> In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240627_103559_734651_0DC00D09 X-CRM114-Status: UNSURE ( 6.48 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 2024-06-27 16:10, Andreas Schwab wrote: > On Jun 27 2024, Celeste Liu wrote: > >> suggestion and we found cast long to ulong is implementation-defined >> behavior in C > > There is nothing implementaton-defined in a long to ulong conversion. > Ok, I misremembered. long to ulong is modulo arithmetic but ulong to long is implementation-defined behavior. There is no type cast issue. _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv