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AJvYcCUAVthHiDMWb4q7DWMmK5Gk4YKjFAxgTLPClZJrjCmE9FrGjk9msz7WYn8BpqvhKi/CIXneIUHwhZ7lHPKDbTZX@lists.infradead.org X-Gm-Message-State: AOJu0YwD6003FThaJ3HiF0ltFQ67CtiHETncqqEVb+Z9ShJjId2oq7Ko UZSTMF899Pwt5+EuBxLALYfcXxhwTPXx0vIgPz3wcTUMT/hUdgOilVbKj4NRMEwCzlS0rKSEClr F3ThdXw== X-Google-Smtp-Source: AGHT+IGhJSVrXcuIauCCTdcdrck6v986JR4xLPN3EKMbWJDNglYuGen8NURA01YPhhzdv9BlJdEWKZRc9pFA X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:1541:e490:aa80:5766]) (user=irogers job=sendgmr) by 2002:a05:690c:2901:b0:6eb:ac7:b4bc with SMTP id 00721157ae682-6febf2a661cmr5088337b3.2.1741393957696; Fri, 07 Mar 2025 16:32:37 -0800 (PST) Date: Fri, 7 Mar 2025 16:32:09 -0800 In-Reply-To: <20250308003209.234114-1-irogers@google.com> Message-Id: <20250308003209.234114-12-irogers@google.com> Mime-Version: 1.0 References: <20250308003209.234114-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.rc0.332.g42c0ae87b1-goog Subject: [PATCH v5 11/11] perf syscalltbl: Mask off ABI type for MIPS system calls From: Ian Rogers To: Ian Rogers , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , 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==?= " , Howard Chu , 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, Arnd Bergmann X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250307_163239_207454_70347FEB X-CRM114-Status: GOOD ( 12.31 ) 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 Arnd Bergmann described that MIPS system calls don't necessarily start from 0 as an ABI prefix is applied: https://lore.kernel.org/lkml/8ed7dfb2-1e4d-4aa4-a04b-0397a89365d1@app.fastmail.com/ When decoding the "id" (aka system call number) for MIPS ignore values greater-than 1000. Signed-off-by: Ian Rogers --- tools/perf/util/syscalltbl.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c index db0d2b81aed1..ace66e69c1bc 100644 --- a/tools/perf/util/syscalltbl.c +++ b/tools/perf/util/syscalltbl.c @@ -46,6 +46,14 @@ const char *syscalltbl__name(int e_machine, int id) { const struct syscalltbl *table = find_table(e_machine); + if (e_machine == EM_MIPS && id > 1000) { + /* + * MIPS may encode the N32/64/O32 type in the high part of + * syscall number. Mask this off if present. See the values of + * __NR_N32_Linux, __NR_64_Linux, __NR_O32_Linux and __NR_Linux. + */ + id = id % 1000; + } if (table && id >= 0 && id < table->num_to_name_len) return table->num_to_name[id]; return NULL;