kprobes: Use rethook for kretprobe if possible

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Use rethook for kretprobe function return hooking if the arch sets
CONFIG_HAVE_RETHOOK=y. In this case, CONFIG_KRETPROBE_ON_RETHOOK is
set to 'y' automatically, and the kretprobe internal data fields
switches to use rethook. If not, it continues to use kretprobe
specific function return hooks.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/164826162556.2455864.12255833167233452047.stgit@devnote2

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This commit is contained in:

Masami Hiramatsu 2022-03-26 11:27:05 +09:00 • committed by Alexei Starovoitov

parent ef8a257b4e

commit 73f9b911fa

5 changed files with 163 additions and 25 deletions

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8

arch/Kconfig

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51

include/linux/kprobes.h

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1

kernel/Makefile

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124

kernel/kprobes.c

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4

kernel/trace/trace_kprobe.c

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