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authorMasami Hiramatsu (Google) <mhiramat@kernel.org>2023-02-02 00:56:01 +0900
committerSteven Rostedt (Google) <rostedt@goodmis.org>2023-03-28 18:52:22 -0400
commit76d0de5729c0569c4071e7f21fcab394e502f03a (patch)
tree0e6480d777c2aa8f9448b471742ca0c4c70b724a /samples
parente11b521a7b69c2621bb2e5920bb96f6d2facdc7e (diff)
downloadlwn-76d0de5729c0569c4071e7f21fcab394e502f03a.tar.gz
lwn-76d0de5729c0569c4071e7f21fcab394e502f03a.zip
fprobe: Pass entry_data to handlers
Pass the private entry_data to the entry and exit handlers so that they can share the context data, something like saved function arguments etc. User must specify the private entry_data size by @entry_data_size field before registering the fprobe. Link: https://lkml.kernel.org/r/167526696173.433354.17408372048319432574.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>
Diffstat (limited to 'samples')
-rw-r--r--samples/fprobe/fprobe_example.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/samples/fprobe/fprobe_example.c b/samples/fprobe/fprobe_example.c
index e22da8573116..dd794990ad7e 100644
--- a/samples/fprobe/fprobe_example.c
+++ b/samples/fprobe/fprobe_example.c
@@ -48,7 +48,8 @@ static void show_backtrace(void)
stack_trace_print(stacks, len, 24);
}
-static void sample_entry_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs)
+static void sample_entry_handler(struct fprobe *fp, unsigned long ip,
+ struct pt_regs *regs, void *data)
{
if (use_trace)
/*
@@ -63,7 +64,8 @@ static void sample_entry_handler(struct fprobe *fp, unsigned long ip, struct pt_
show_backtrace();
}
-static void sample_exit_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs)
+static void sample_exit_handler(struct fprobe *fp, unsigned long ip, struct pt_regs *regs,
+ void *data)
{
unsigned long rip = instruction_pointer(regs);