bpf: Add trampolines to kallsyms

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Adding trampolines to kallsyms. It's displayed as
  bpf_trampoline_<ID> [bpf]

where ID is the BTF id of the trampoline function.

Adding bpf_image_ksym_add/del functions that setup
the start/end values and call KSYMBOL perf events
handlers.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200312195610.346362-11-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Jiri Olsa 2020-03-12 20:56:05 +01:00 • committed by Alexei Starovoitov

parent dba122fb5e

commit a108f7dcfa

2 changed files with 31 additions and 0 deletions

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3

include/linux/bpf.h

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28

kernel/bpf/trampoline.c

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