Arnaldo Carvalho de Melo 3803a22931 perf trace: Put the per-syscall entry/exit prog_array BPF map infrastructure in place ... I.e. look for "syscalls_sys_enter" and "syscalls_sys_exit" BPF maps of type PROG_ARRAY and populate it with the handlers as specified per syscall, for now only 'open' is wiring it to something, in time all syscalls that need to copy arguments entering a syscall or returning from one will set these to the right handlers, reusing when possible pre-existing ones. Next step is to use bpf_tail_call() into that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-t0p4u43i9vbpzs1xtowna3gb@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2019-07-29 18:34:41 -03:00
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bpf	perf trace: Put the per-syscall entry/exit prog_array BPF map infrastructure in place	2019-07-29 18:34:41 -03:00