linux-kernel - Re: [PATCH bpf-next 01/13] uprobes: Rename arch_uretprobe

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Message-ID: <CAEf4BzZEbUpc0CnsJXWvbpSEvhF7hpnScCR7GdmpvMMkSm0W9w@mail.gmail.com>
Date: Thu, 12 Dec 2024 16:42:57 -0800
From: Andrii Nakryiko <andrii.nakryiko@...il.com>
To: Jiri Olsa <jolsa@...nel.org>
Cc: Oleg Nesterov <oleg@...hat.com>, Peter Zijlstra <peterz@...radead.org>, 
	Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org, Song Liu <songliubraving@...com>, 
	Yonghong Song <yhs@...com>, John Fastabend <john.fastabend@...il.com>, Hao Luo <haoluo@...gle.com>, 
	Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, 
	Alan Maguire <alan.maguire@...cle.com>, linux-kernel@...r.kernel.org, 
	linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next 01/13] uprobes: Rename arch_uretprobe_trampoline function

On Wed, Dec 11, 2024 at 5:34 AM Jiri Olsa <jolsa@...nel.org> wrote:
>
> We are about to add uprobe trampoline, so cleaning up the namespace.
>
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>
> ---
>  arch/x86/kernel/uprobes.c | 2 +-
>  include/linux/uprobes.h   | 2 +-
>  kernel/events/uprobes.c   | 4 ++--
>  3 files changed, 4 insertions(+), 4 deletions(-)
>

LGTM

Acked-by: Andrii Nakryiko <andrii@...nel.org>

> diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
> index 5a952c5ea66b..22a17c149a55 100644
> --- a/arch/x86/kernel/uprobes.c
> +++ b/arch/x86/kernel/uprobes.c
> @@ -338,7 +338,7 @@ extern u8 uretprobe_trampoline_entry[];
>  extern u8 uretprobe_trampoline_end[];
>  extern u8 uretprobe_syscall_check[];
>
> -void *arch_uprobe_trampoline(unsigned long *psize)
> +void *arch_uretprobe_trampoline(unsigned long *psize)
>  {
>         static uprobe_opcode_t insn = UPROBE_SWBP_INSN;
>         struct pt_regs *regs = task_pt_regs(current);
> diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
> index e0a4c2082245..09a298e416a8 100644
> --- a/include/linux/uprobes.h
> +++ b/include/linux/uprobes.h
> @@ -211,7 +211,7 @@ extern bool arch_uprobe_ignore(struct arch_uprobe *aup, struct pt_regs *regs);
>  extern void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
>                                          void *src, unsigned long len);
>  extern void uprobe_handle_trampoline(struct pt_regs *regs);
> -extern void *arch_uprobe_trampoline(unsigned long *psize);
> +extern void *arch_uretprobe_trampoline(unsigned long *psize);
>  extern unsigned long uprobe_get_trampoline_vaddr(void);
>  #else /* !CONFIG_UPROBES */
>  struct uprobes_state {
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index fa04b14a7d72..e0e3ebb4c0a1 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1695,7 +1695,7 @@ static int xol_add_vma(struct mm_struct *mm, struct xol_area *area)
>         return ret;
>  }
>
> -void * __weak arch_uprobe_trampoline(unsigned long *psize)
> +void * __weak arch_uretprobe_trampoline(unsigned long *psize)
>  {
>         static uprobe_opcode_t insn = UPROBE_SWBP_INSN;
>
> @@ -1727,7 +1727,7 @@ static struct xol_area *__create_xol_area(unsigned long vaddr)
>         init_waitqueue_head(&area->wq);
>         /* Reserve the 1st slot for get_trampoline_vaddr() */
>         set_bit(0, area->bitmap);
> -       insns = arch_uprobe_trampoline(&insns_size);
> +       insns = arch_uretprobe_trampoline(&insns_size);
>         arch_uprobe_copy_ixol(area->page, 0, insns, insns_size);
>
>         if (!xol_add_vma(mm, area))
> --
> 2.47.0
>