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Message-ID: <CAP-5=fXRz_8CKNz4Fr-=0yhKbf_QE2ND+PPykSAO5p8wcUz7xA@mail.gmail.com> Date: Mon, 3 Feb 2025 11:10:49 -0800 From: Ian Rogers <irogers@...gle.com> To: Charlie Jenkins <charlie@...osinc.com> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>, Kan Liang <kan.liang@...ux.intel.com>, John Garry <john.g.garry@...cle.com>, Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>, Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>, Guo Ren <guoren@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Bibo Mao <maobibo@...ngson.cn>, Arnd Bergmann <arnd@...db.de>, Huacai Chen <chenhuacai@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Jiri Slaby <jirislaby@...nel.org>, Björn Töpel <bjorn@...osinc.com>, Howard Chu <howardchu95@...il.com>, linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org, linux-riscv@...ts.infradead.org Subject: Re: [PATCH v1 0/7] perf: Support multiple system call tables in the build On Mon, Feb 3, 2025 at 11:02 AM Charlie Jenkins <charlie@...osinc.com> wrote: > > On Fri, Jan 31, 2025 at 11:14:48PM -0800, Ian Rogers wrote: > > This work builds on the clean up of system call tables and removal of > > libaudit by Charlie Jenkins <charlie@...osinc.com>. > > > > The system call table in perf trace is used to map system call numbers > > to names and vice versa. Prior to these changes, a single table > > matching the perf binary's build was present. The table would be > > incorrect if tracing say a 32-bit binary from a 64-bit version of > > perf, the names and numbers wouldn't match. > > > > Change the build so that a single system call file is built and the > > potentially multiple tables are identifiable from the ELF machine type > > of the process being examined. To determine the ELF machine type, the > > executable's header is read from /proc/pid/exe with fallbacks to using > > the perf's binary type when unknown. > > > > Remove some runtime types used by the system call tables and make > > equivalents generated at build time. > > Our approaches are very different but I sent out a patch to do this a > couple of weeks ago [1]. > > Did you look at that and decide you didn't like the approach? Missing link? The patches generating a syscall(_32|_64)?.h landed. These changes take your changes and make it so that we just run the script once building a header file for all architectures. On x86 we then have the tables be guarded by ifdefs on i386 and x86-64. Then rather than the table just matching the host architecture the ELF machine is used for the executable running. Thanks, Ian > - Charlie > > > > > Ian Rogers (7): > > perf syscalltble: Remove syscall_table.h > > perf trace: Reorganize syscalls > > perf syscalltbl: Remove struct syscalltbl > > perf thread: Add support for reading the e_machine type for a thread > > perf trace beauty: Add syscalltbl.sh generating all system call tables > > perf syscalltbl: Use lookup table containing multiple architectures > > perf build: Remove Makefile.syscalls > > > > tools/perf/Makefile.perf | 10 +- > > tools/perf/arch/alpha/entry/syscalls/Kbuild | 2 - > > .../alpha/entry/syscalls/Makefile.syscalls | 5 - > > tools/perf/arch/alpha/include/syscall_table.h | 2 - > > tools/perf/arch/arc/entry/syscalls/Kbuild | 2 - > > .../arch/arc/entry/syscalls/Makefile.syscalls | 3 - > > tools/perf/arch/arc/include/syscall_table.h | 2 - > > tools/perf/arch/arm/entry/syscalls/Kbuild | 4 - > > .../arch/arm/entry/syscalls/Makefile.syscalls | 2 - > > tools/perf/arch/arm/include/syscall_table.h | 2 - > > tools/perf/arch/arm64/entry/syscalls/Kbuild | 3 - > > .../arm64/entry/syscalls/Makefile.syscalls | 6 - > > tools/perf/arch/arm64/include/syscall_table.h | 8 - > > tools/perf/arch/csky/entry/syscalls/Kbuild | 2 - > > .../csky/entry/syscalls/Makefile.syscalls | 3 - > > tools/perf/arch/csky/include/syscall_table.h | 2 - > > .../perf/arch/loongarch/entry/syscalls/Kbuild | 2 - > > .../entry/syscalls/Makefile.syscalls | 3 - > > .../arch/loongarch/include/syscall_table.h | 2 - > > tools/perf/arch/mips/entry/syscalls/Kbuild | 2 - > > .../mips/entry/syscalls/Makefile.syscalls | 5 - > > tools/perf/arch/mips/include/syscall_table.h | 2 - > > tools/perf/arch/parisc/entry/syscalls/Kbuild | 3 - > > .../parisc/entry/syscalls/Makefile.syscalls | 6 - > > .../perf/arch/parisc/include/syscall_table.h | 8 - > > tools/perf/arch/powerpc/entry/syscalls/Kbuild | 3 - > > .../powerpc/entry/syscalls/Makefile.syscalls | 6 - > > .../perf/arch/powerpc/include/syscall_table.h | 8 - > > tools/perf/arch/riscv/entry/syscalls/Kbuild | 2 - > > .../riscv/entry/syscalls/Makefile.syscalls | 4 - > > tools/perf/arch/riscv/include/syscall_table.h | 8 - > > tools/perf/arch/s390/entry/syscalls/Kbuild | 2 - > > .../s390/entry/syscalls/Makefile.syscalls | 5 - > > tools/perf/arch/s390/include/syscall_table.h | 2 - > > tools/perf/arch/sh/entry/syscalls/Kbuild | 2 - > > .../arch/sh/entry/syscalls/Makefile.syscalls | 4 - > > tools/perf/arch/sh/include/syscall_table.h | 2 - > > tools/perf/arch/sparc/entry/syscalls/Kbuild | 3 - > > .../sparc/entry/syscalls/Makefile.syscalls | 5 - > > tools/perf/arch/sparc/include/syscall_table.h | 8 - > > tools/perf/arch/x86/entry/syscalls/Kbuild | 3 - > > .../arch/x86/entry/syscalls/Makefile.syscalls | 6 - > > tools/perf/arch/x86/include/syscall_table.h | 8 - > > tools/perf/arch/xtensa/entry/syscalls/Kbuild | 2 - > > .../xtensa/entry/syscalls/Makefile.syscalls | 4 - > > .../perf/arch/xtensa/include/syscall_table.h | 2 - > > tools/perf/builtin-trace.c | 275 +++++++++++------- > > tools/perf/scripts/Makefile.syscalls | 61 ---- > > tools/perf/scripts/syscalltbl.sh | 86 ------ > > tools/perf/trace/beauty/syscalltbl.sh | 274 +++++++++++++++++ > > tools/perf/util/syscalltbl.c | 142 ++++----- > > tools/perf/util/syscalltbl.h | 22 +- > > tools/perf/util/thread.c | 50 ++++ > > tools/perf/util/thread.h | 14 +- > > 54 files changed, 598 insertions(+), 506 deletions(-) > > delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h > > delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/arc/include/syscall_table.h > > delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/arm/include/syscall_table.h > > delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h > > delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/csky/include/syscall_table.h > > delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h > > delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/mips/include/syscall_table.h > > delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h > > delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h > > delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h > > delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/s390/include/syscall_table.h > > delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/sh/include/syscall_table.h > > delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h > > delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/x86/include/syscall_table.h > > delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild > > delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls > > delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h > > delete mode 100644 tools/perf/scripts/Makefile.syscalls > > delete mode 100755 tools/perf/scripts/syscalltbl.sh > > create mode 100755 tools/perf/trace/beauty/syscalltbl.sh > > > > -- > > 2.48.1.362.g079036d154-goog > >
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