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From: Menglong Dong <menglong8.dong@gmail.com>
To: ast@kernel.org, rostedt@goodmis.org
Cc: daniel@iogearbox.net, john.fastabend@gmail.com,
	andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com,
	song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org,
	sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org,
	mhiramat@kernel.org, mark.rutland@arm.com,
	mathieu.desnoyers@efficios.com, jiang.biao@linux.dev,
	bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-trace-kernel@vger.kernel.org
Subject: [PATCH bpf-next v2 3/6] bpf: fix the usage of BPF_TRAMP_F_SKIP_FRAME
Date: Mon, 17 Nov 2025 11:49:03 +0800	[thread overview]
Message-ID: <20251117034906.32036-4-dongml2@chinatelecom.cn> (raw)
In-Reply-To: <20251117034906.32036-1-dongml2@chinatelecom.cn>

Some places calculate the origin_call by checking if
BPF_TRAMP_F_SKIP_FRAME is set. However, it should use
BPF_TRAMP_F_ORIG_STACK for this propose. Just fix them.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Acked-by: Alexei Starovoitov <ast@kernel.org>
---
 arch/riscv/net/bpf_jit_comp64.c | 2 +-
 arch/x86/net/bpf_jit_comp.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/net/bpf_jit_comp64.c b/arch/riscv/net/bpf_jit_comp64.c
index 45cbc7c6fe49..21c70ae3296b 100644
--- a/arch/riscv/net/bpf_jit_comp64.c
+++ b/arch/riscv/net/bpf_jit_comp64.c
@@ -1131,7 +1131,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im,
 	store_args(nr_arg_slots, args_off, ctx);
 
 	/* skip to actual body of traced function */
-	if (flags & BPF_TRAMP_F_SKIP_FRAME)
+	if (flags & BPF_TRAMP_F_ORIG_STACK)
 		orig_call += RV_FENTRY_NINSNS * 4;
 
 	if (flags & BPF_TRAMP_F_CALL_ORIG) {
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index 36a0d4db9f68..808d4343f6cf 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -3289,7 +3289,7 @@ static int __arch_prepare_bpf_trampoline(struct bpf_tramp_image *im, void *rw_im
 
 	arg_stack_off = stack_size;
 
-	if (flags & BPF_TRAMP_F_SKIP_FRAME) {
+	if (flags & BPF_TRAMP_F_CALL_ORIG) {
 		/* skip patched call instruction and point orig_call to actual
 		 * body of the kernel function.
 		 */
-- 
2.51.2


  parent reply	other threads:[~2025-11-17  3:49 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-11-17  3:49 [PATCH bpf-next v2 0/6] bpf trampoline support "jmp" mode Menglong Dong
2025-11-17  3:49 ` [PATCH bpf-next v2 1/6] ftrace: introduce FTRACE_OPS_FL_JMP Menglong Dong
2025-11-18  5:19   ` Masami Hiramatsu
2025-11-18  6:14     ` Menglong Dong
2025-11-17  3:49 ` [PATCH bpf-next v2 2/6] x86/ftrace: implement DYNAMIC_FTRACE_WITH_JMP Menglong Dong
2025-11-17  3:49 ` Menglong Dong [this message]
2025-11-17  3:49 ` [PATCH bpf-next v2 4/6] bpf,x86: adjust the "jmp" mode for bpf trampoline Menglong Dong
2025-11-17  3:49 ` [PATCH bpf-next v2 5/6] bpf: specify the old and new poke_type for bpf_arch_text_poke Menglong Dong
2025-11-17 20:55   ` kernel test robot
2025-11-17  3:49 ` [PATCH bpf-next v2 6/6] bpf: implement "jmp" mode for trampoline Menglong Dong
2025-11-17 22:49   ` kernel test robot
2025-11-18  1:20   ` Menglong Dong
2025-11-18  5:09   ` kernel test robot
2025-11-18  6:31 ` [PATCH bpf-next v2 0/6] bpf trampoline support "jmp" mode Alexei Starovoitov
2025-11-18  6:34   ` Menglong Dong
2025-11-18  6:41     ` Alexei Starovoitov
2025-11-18  6:46       ` Menglong Dong

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