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f42a58ffb8
Adding test that creates uprobe consumer on uretprobe which changes some of the registers. Making sure the changed registers are propagated to the user space when the ureptobe syscall trampoline is used on x86_64. To be able to do this, adding support to bpf_testmod to create uprobe via new attribute file: /sys/kernel/bpf_testmod_uprobe This file is expecting file offset and creates related uprobe on current process exe file and removes existing uprobe if offset is 0. The can be only single uprobe at any time. The uprobe has specific consumer that changes registers used in ureprobe syscall trampoline and which are later checked in the test. Link: https://lore.kernel.org/all/20240611112158.40795-7-jolsa@kernel.org/ Acked-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> |
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