diff mbox series

[v2,1/4] uprobes: rename get_trampoline_vaddr() and make it global

Message ID 20240522013845.1631305-2-andrii@kernel.org (mailing list archive)
State Handled Elsewhere, archived
Delegated to: BPF
Headers show
Series Fix user stack traces captured from uprobes | expand

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Commit Message

Andrii Nakryiko May 22, 2024, 1:38 a.m. UTC 
This helper is needed in another file, so make it a bit more uniquely
named and expose it internally.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
 include/linux/uprobes.h | 1 +
 kernel/events/uprobes.c | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

Comments

Masami Hiramatsu (Google) June 25, 2024, 12:28 a.m. UTC | #1 
On Tue, 21 May 2024 18:38:42 -0700
Andrii Nakryiko <andrii@kernel.org> wrote:

> This helper is needed in another file, so make it a bit more uniquely
> named and expose it internally.
> 
> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

Looks good to me.

Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>

Thank you

> ---
>  include/linux/uprobes.h | 1 +
>  kernel/events/uprobes.c | 6 +++---
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
> index f46e0ca0169c..0c57eec85339 100644
> --- a/include/linux/uprobes.h
> +++ b/include/linux/uprobes.h
> @@ -138,6 +138,7 @@ extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check c
>  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 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 8ae0eefc3a34..d60d24f0f2f4 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1827,7 +1827,7 @@ void uprobe_copy_process(struct task_struct *t, unsigned long flags)
>   *
>   * Returns -1 in case the xol_area is not allocated.
>   */
> -static unsigned long get_trampoline_vaddr(void)
> +unsigned long uprobe_get_trampoline_vaddr(void)
>  {
>  	struct xol_area *area;
>  	unsigned long trampoline_vaddr = -1;
> @@ -1878,7 +1878,7 @@ static void prepare_uretprobe(struct uprobe *uprobe, struct pt_regs *regs)
>  	if (!ri)
>  		return;
>  
> -	trampoline_vaddr = get_trampoline_vaddr();
> +	trampoline_vaddr = uprobe_get_trampoline_vaddr();
>  	orig_ret_vaddr = arch_uretprobe_hijack_return_addr(trampoline_vaddr, regs);
>  	if (orig_ret_vaddr == -1)
>  		goto fail;
> @@ -2187,7 +2187,7 @@ static void handle_swbp(struct pt_regs *regs)
>  	int is_swbp;
>  
>  	bp_vaddr = uprobe_get_swbp_addr(regs);
> -	if (bp_vaddr == get_trampoline_vaddr())
> +	if (bp_vaddr == uprobe_get_trampoline_vaddr())
>  		return handle_trampoline(regs);
>  
>  	uprobe = find_active_uprobe(bp_vaddr, &is_swbp);
> -- 
> 2.43.0
>
Masami Hiramatsu (Google) June 25, 2024, 1:02 a.m. UTC | #2 
On Tue, 21 May 2024 18:38:42 -0700
Andrii Nakryiko <andrii@kernel.org> wrote:

> This helper is needed in another file, so make it a bit more uniquely
> named and expose it internally.
> 
> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

Sorry, I think this conflicts with

https://lore.kernel.org/all/20240611112158.40795-4-jolsa@kernel.org/

And that is already picked.

Thanks,

> ---
>  include/linux/uprobes.h | 1 +
>  kernel/events/uprobes.c | 6 +++---
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
> index f46e0ca0169c..0c57eec85339 100644
> --- a/include/linux/uprobes.h
> +++ b/include/linux/uprobes.h
> @@ -138,6 +138,7 @@ extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check c
>  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 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 8ae0eefc3a34..d60d24f0f2f4 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1827,7 +1827,7 @@ void uprobe_copy_process(struct task_struct *t, unsigned long flags)
>   *
>   * Returns -1 in case the xol_area is not allocated.
>   */
> -static unsigned long get_trampoline_vaddr(void)
> +unsigned long uprobe_get_trampoline_vaddr(void)
>  {
>  	struct xol_area *area;
>  	unsigned long trampoline_vaddr = -1;
> @@ -1878,7 +1878,7 @@ static void prepare_uretprobe(struct uprobe *uprobe, struct pt_regs *regs)
>  	if (!ri)
>  		return;
>  
> -	trampoline_vaddr = get_trampoline_vaddr();
> +	trampoline_vaddr = uprobe_get_trampoline_vaddr();
>  	orig_ret_vaddr = arch_uretprobe_hijack_return_addr(trampoline_vaddr, regs);
>  	if (orig_ret_vaddr == -1)
>  		goto fail;
> @@ -2187,7 +2187,7 @@ static void handle_swbp(struct pt_regs *regs)
>  	int is_swbp;
>  
>  	bp_vaddr = uprobe_get_swbp_addr(regs);
> -	if (bp_vaddr == get_trampoline_vaddr())
> +	if (bp_vaddr == uprobe_get_trampoline_vaddr())
>  		return handle_trampoline(regs);
>  
>  	uprobe = find_active_uprobe(bp_vaddr, &is_swbp);
> -- 
> 2.43.0
>
diff mbox series

Patch

diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h
index f46e0ca0169c..0c57eec85339 100644
--- a/include/linux/uprobes.h
+++ b/include/linux/uprobes.h
@@ -138,6 +138,7 @@  extern bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check c
 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 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 8ae0eefc3a34..d60d24f0f2f4 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1827,7 +1827,7 @@  void uprobe_copy_process(struct task_struct *t, unsigned long flags)
  *
  * Returns -1 in case the xol_area is not allocated.
  */
-static unsigned long get_trampoline_vaddr(void)
+unsigned long uprobe_get_trampoline_vaddr(void)
 {
 	struct xol_area *area;
 	unsigned long trampoline_vaddr = -1;
@@ -1878,7 +1878,7 @@  static void prepare_uretprobe(struct uprobe *uprobe, struct pt_regs *regs)
 	if (!ri)
 		return;
 
-	trampoline_vaddr = get_trampoline_vaddr();
+	trampoline_vaddr = uprobe_get_trampoline_vaddr();
 	orig_ret_vaddr = arch_uretprobe_hijack_return_addr(trampoline_vaddr, regs);
 	if (orig_ret_vaddr == -1)
 		goto fail;
@@ -2187,7 +2187,7 @@  static void handle_swbp(struct pt_regs *regs)
 	int is_swbp;
 
 	bp_vaddr = uprobe_get_swbp_addr(regs);
-	if (bp_vaddr == get_trampoline_vaddr())
+	if (bp_vaddr == uprobe_get_trampoline_vaddr())
 		return handle_trampoline(regs);
 
 	uprobe = find_active_uprobe(bp_vaddr, &is_swbp);