[RFC PATCH bpf-next 4/8] bpf: Always expose the probed address

From: Yafang Shao <laoar.shao@gmail.com>
To: ast@kernel.org, daniel@iogearbox.net, john.fastabend@gmail.com,
	andrii@kernel.org, martin.lau@linux.dev, song@kernel.org,
	yhs@fb.com, kpsingh@kernel.org, sdf@google.com,
	haoluo@google.com, jolsa@kernel.org, quentin@isovalent.com
Cc: bpf@vger.kernel.org, Yafang Shao <laoar.shao@gmail.com>
Subject: [RFC PATCH bpf-next 4/8] bpf: Always expose the probed address
Date: Sun, 28 May 2023 14:20:23 +0000	[thread overview]
Message-ID: <20230528142027.5585-5-laoar.shao@gmail.com> (raw)
In-Reply-To: <20230528142027.5585-1-laoar.shao@gmail.com>

Since different symbols can share the same name, it is insufficient to only
expose the symbol name. It is essential to also expose the symbol address
so that users can accurately identify which one is being probed.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
---
 kernel/trace/trace_kprobe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 59cda19..a7a905a 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1547,7 +1547,7 @@ int bpf_get_kprobe_info(const struct perf_event *event, u32 *fd_type,
 	if (tk->symbol) {
 		*symbol = tk->symbol;
 		*probe_offset = tk->rp.kp.offset;
-		*probe_addr = 0;
+		*probe_addr = (unsigned long)tk->rp.kp.addr;
 	} else {
 		*symbol = NULL;
 		*probe_offset = 0;
-- 
1.8.3.1

