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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2021-09-14 23:42:12 +0900 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-09-30 21:24:07 -0400 |
| commit | df91c5bccb0c2cb868b54bd68a6ddf1fcbede6b1 (patch) | |
| tree | a59ebf2643820e0c4a7928e667f9b86fc77a7a7c /kernel/trace/trace_output.c | |
| parent | 7391dd19027cec4e0edf81b7c27079ae0ecd2d6b (diff) | |
| download | linux-df91c5bccb0c2cb868b54bd68a6ddf1fcbede6b1.tar.gz linux-df91c5bccb0c2cb868b54bd68a6ddf1fcbede6b1.tar.bz2 linux-df91c5bccb0c2cb868b54bd68a6ddf1fcbede6b1.zip | |
kprobes: Enable stacktrace from pt_regs in kretprobe handler
Since the ORC unwinder from pt_regs requires setting up regs->ip
correctly, set the correct return address to the regs->ip before
calling user kretprobe handler.
This allows the kretrprobe handler to trace stack from the
kretprobe's pt_regs by stack_trace_save_regs() (eBPF will do
this), instead of stack tracing from the handler context by
stack_trace_save() (ftrace will do this).
Link: https://lkml.kernel.org/r/163163053237.489837.4272653874525136832.stgit@devnote2
Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_output.c')
0 files changed, 0 insertions, 0 deletions