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AJvYcCU/5ljJKB6CvfQkpjjX8ZHS7DiSaE/VLx+ibpOoAbJkQnEcjsv0ejqjBYg0UadPG2Hwu/JkEyxxAU//@vger.kernel.org X-Gm-Message-State: AOJu0YyT7G8xEfgIUhdvv8J6OLOWwi8f69A6ELW3RlRrlAKEjwjLqtLk uXt+OtR6SlombSFCPFQj4b5dvjtvVretWFoRJSO5sQwVT+zyRQ2rLcwZNc25PibRaTUIM/tYBuX t/v+X4Q== X-Google-Smtp-Source: AGHT+IGcXI4xtcRg7TZCt539wnaKT0i5MXbKrcmjSAdt+8/cOoexhcuHk6pVgzO15AtSpOO1xbrgGJNcQRci X-Received: from irogers.svl.corp.google.com ([2620:15c:2c5:11:8af9:d1f7:bca9:da2]) (user=irogers job=sendgmr) by 2002:a05:690c:2a81:b0:6f9:ad6e:5945 with SMTP id 00721157ae682-6fd49e2336dmr19606227b3.0.1741064687649; Mon, 03 Mar 2025 21:04:47 -0800 (PST) Date: Mon, 3 Mar 2025 21:03:05 -0800 In-Reply-To: <20250304050305.901167-1-irogers@google.com> Message-Id: <20250304050305.901167-12-irogers@google.com> Precedence: bulk X-Mailing-List: linux-csky@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250304050305.901167-1-irogers@google.com> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog Subject: [PATCH v4 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?q?Bj=C3=B6rn=20T=C3=B6pel?=" , 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 Content-Type: text/plain; charset="UTF-8" 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; -- 2.48.1.711.g2feabab25a-goog