bpf: Add bpf_get_func_ip helper for kprobe programs

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Adding bpf_get_func_ip helper for BPF_PROG_TYPE_KPROBE programs,
so it's now possible to call bpf_get_func_ip from both kprobe and
kretprobe programs.

Taking the caller's address from 'struct kprobe::addr', which is
defined for both kprobe and kretprobe.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/bpf/20210714094400.396467-5-jolsa@kernel.org

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Jiri Olsa 2021-07-14 11:43:56 +02:00 • committed by Alexei Starovoitov

parent 9b99edcae5

commit 9ffd9f3ff7

4 changed files with 20 additions and 2 deletions

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2

include/uapi/linux/bpf.h

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2

kernel/bpf/verifier.c

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16

kernel/trace/bpf_trace.c

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2

tools/include/uapi/linux/bpf.h

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