fprobe: Skip exit_handler if entry_handler returns !0

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Skip hooking function return and calling exit_handler if the
entry_handler() returns !0.

Link: https://lkml.kernel.org/r/167526699798.433354.10998365726830117303.stgit@mhiramat.roam.corp.google.com

Cc: Florent Revest <revest@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

...

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Masami Hiramatsu (Google) 2023-02-02 00:56:38 +09:00 • committed by Steven Rostedt (Google)

parent 7e7ef1bfe5

commit 39d954200b

5 changed files with 32 additions and 13 deletions

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4

include/linux/fprobe.h

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15

kernel/trace/bpf_trace.c

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14

kernel/trace/fprobe.c

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7

lib/test_fprobe.c

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5

samples/fprobe/fprobe_example.c

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