On Fri, Jan 31, 2025 at 11:15 PM Ian Rogers <irogers@xxxxxxxxxx> wrote: > > This work builds on the clean up of system call tables and removal of > libaudit by Charlie Jenkins <charlie@xxxxxxxxxxxx>. > > 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. > > 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 If you are looking for the improvement this series achieves, patch 6 has sample before and after output: https://lore.kernel.org/lkml/20250201071455.718247-7-irogers@xxxxxxxxxx/ Thanks, Ian
