Currently, bpf programs cannot be attached to sys_enter_* and sys_exit_*
style tracepoints. The main reason is that syscalls/sys_enter_* and
syscalls/sys_exit_*
tracepoints are treated differently from other tracepoints and there
is no bpf hook to it.
This patch set adds bpf support for these syscalls tracepoints and also
adds a test case for it.
Yonghong Song (2):
bpf: add support for sys_enter_* and sys_exit_* tracepoints
bpf: add a test case for syscalls/sys_{enter|exit}_* tracepoints
kernel/events/core.c | 9 ++++--
kernel/trace/trace_syscalls.c | 53 ++++++++++++++++++++++++++++++--
samples/bpf/Makefile | 4 +++
samples/bpf/syscall_tp_kern.c | 62 +++++++++++++++++++++++++++++++++++++
samples/bpf/syscall_tp_user.c | 71 +++++++++++++++++++++++++++++++++++++++++++
5 files changed, 194 insertions(+), 5 deletions(-)
create mode 100644 samples/bpf/syscall_tp_kern.c
create mode 100644 samples/bpf/syscall_tp_user.c
--
2.9.4
