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authorMasami Hiramatsu (Google) <mhiramat@kernel.org>2023-06-06 21:39:55 +0900
committerMasami Hiramatsu (Google) <mhiramat@kernel.org>2023-06-06 21:39:55 +0900
commitcb16330d12741f6dae56aad5acf62f5be3a06c4e (patch)
tree989f603fa2a1d02a0e12fc411435337102f45e8b /samples/fprobe
parent9561de3a55bed6bdd44a12820ba81ec416e705a7 (diff)
fprobe: Pass return address to the handlers
Pass return address as 'ret_ip' to the fprobe entry and return handlers so that the fprobe user handler can get the reutrn address without analyzing arch-dependent pt_regs. Link: https://lore.kernel.org/all/168507467664.913472.11642316698862778600.stgit@mhiramat.roam.corp.google.com/ Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'samples/fprobe')
-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 4efc8feb6277..64e715e7ed11 100644
--- a/samples/fprobe/fprobe_example.c
+++ b/samples/fprobe/fprobe_example.c
@@ -49,6 +49,7 @@ static void show_backtrace(void)
}
static int sample_entry_handler(struct fprobe *fp, unsigned long ip,
+ unsigned long ret_ip,
struct pt_regs *regs, void *data)
{
if (use_trace)
@@ -65,10 +66,11 @@ static int sample_entry_handler(struct fprobe *fp, unsigned long ip,
return 0;
}
-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,
+ unsigned long ret_ip, struct pt_regs *regs,
void *data)
{
- unsigned long rip = instruction_pointer(regs);
+ unsigned long rip = ret_ip;
if (use_trace)
/*