bpf: Add bpf_get_func_ip kprobe helper for multi kprobe link
Adding support to call bpf_get_func_ip helper from kprobe programs attached by multi kprobe link. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20220316122419.933957-5-jolsa@kernel.org
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