From: Masami Hiramatsu <mhiramat@kernel.org> To: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@kernel.org> Cc: X86 ML <x86@kernel.org>, Masami Hiramatsu <mhiramat@kernel.org>, Daniel Xu <dxu@dxuuu.xyz>, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, kuba@kernel.org, mingo@redhat.com, ast@kernel.org, tglx@linutronix.de, kernel-team@fb.com, yhs@fb.com, Josh Poimboeuf <jpoimboe@redhat.com>, linux-ia64@vger.kernel.org, Abhishek Sagar <sagar.abhishek@gmail.com>, Andrii Nakryiko <andrii.nakryiko@gmail.com> Subject: [PATCH -tip v7 08/13] arm: kprobes: Make a space for regs->ARM_pc at kretprobe_trampoline Date: Thu, 27 May 2021 15:40:20 +0900 [thread overview] Message-ID: <162209761982.436794.14123705787131288439.stgit@devnote2> (raw) In-Reply-To: <162209754288.436794.3904335049560916855.stgit@devnote2> Change kretprobe_trampoline to make a space for regs->ARM_pc so that kretprobe_trampoline_handler can call instruction_pointer_set() safely. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- arch/arm/probes/kprobes/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c index 1782b41df095..5f3c2b42787f 100644 --- a/arch/arm/probes/kprobes/core.c +++ b/arch/arm/probes/kprobes/core.c @@ -397,11 +397,13 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, void __naked __kprobes kretprobe_trampoline(void) { __asm__ __volatile__ ( + "sub sp, sp, #16 \n\t" "stmdb sp!, {r0 - r11} \n\t" "mov r0, sp \n\t" "bl trampoline_handler \n\t" "mov lr, r0 \n\t" "ldmia sp!, {r0 - r11} \n\t" + "add sp, sp, #16 \n\t" #ifdef CONFIG_THUMB2_KERNEL "bx lr \n\t" #else
WARNING: multiple messages have this Message-ID (diff)
From: Masami Hiramatsu <mhiramat@kernel.org> To: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@kernel.org> Cc: X86 ML <x86@kernel.org>, Masami Hiramatsu <mhiramat@kernel.org>, Daniel Xu <dxu@dxuuu.xyz>, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, kuba@kernel.org, mingo@redhat.com, ast@kernel.org, tglx@linutronix.de, kernel-team@fb.com, yhs@fb.com, Josh Poimboeuf <jpoimboe@redhat.com>, linux-ia64@vger.kernel.org, Abhishek Sagar <sagar.abhishek@gmail.com>, Andrii Nakryiko <andrii.nakryiko@gmail.com> Subject: [PATCH -tip v7 08/13] arm: kprobes: Make a space for regs->ARM_pc at kretprobe_trampoline Date: Thu, 27 May 2021 06:40:20 +0000 [thread overview] Message-ID: <162209761982.436794.14123705787131288439.stgit@devnote2> (raw) In-Reply-To: <162209754288.436794.3904335049560916855.stgit@devnote2> Change kretprobe_trampoline to make a space for regs->ARM_pc so that kretprobe_trampoline_handler can call instruction_pointer_set() safely. Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> --- arch/arm/probes/kprobes/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c index 1782b41df095..5f3c2b42787f 100644 --- a/arch/arm/probes/kprobes/core.c +++ b/arch/arm/probes/kprobes/core.c @@ -397,11 +397,13 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, void __naked __kprobes kretprobe_trampoline(void) { __asm__ __volatile__ ( + "sub sp, sp, #16 \n\t" "stmdb sp!, {r0 - r11} \n\t" "mov r0, sp \n\t" "bl trampoline_handler \n\t" "mov lr, r0 \n\t" "ldmia sp!, {r0 - r11} \n\t" + "add sp, sp, #16 \n\t" #ifdef CONFIG_THUMB2_KERNEL "bx lr \n\t" #else
next prev parent reply other threads:[~2021-05-27 6:40 UTC|newest] Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-05-27 6:39 [PATCH -tip v7 00/13] kprobes: Fix stacktrace with kretprobes on x86 Masami Hiramatsu 2021-05-27 6:39 ` Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 01/13] ia64: kprobes: Fix to pass correct trampoline address to the handler Masami Hiramatsu 2021-05-27 6:39 ` Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 02/13] kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_descriptor() Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 02/13] kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_de Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler Masami Hiramatsu 2021-06-14 15:46 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Naveen N. Rao 2021-06-14 15:58 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_han Naveen N. Rao 2021-06-15 0:06 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Masami Hiramatsu 2021-06-15 0:06 ` [PATCH -tip v7 03/13] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_han Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 04/13] kprobes: Add kretprobe_find_ret_addr() for searching return address Masami Hiramatsu 2021-05-27 6:39 ` Masami Hiramatsu 2021-05-27 6:39 ` [PATCH -tip v7 05/13] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline code Masami Hiramatsu 2021-05-27 6:39 ` Masami Hiramatsu 2021-05-27 6:40 ` [PATCH -tip v7 06/13] ARC: Add instruction_pointer_set() API Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-05-27 6:40 ` [PATCH -tip v7 07/13] ia64: " Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu [this message] 2021-05-27 6:40 ` [PATCH -tip v7 08/13] arm: kprobes: Make a space for regs->ARM_pc at kretprobe_trampoline Masami Hiramatsu 2021-05-27 6:40 ` [PATCH -tip v7 09/13] kprobes: Setup instruction pointer in __kretprobe_trampoline_handler Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-06-17 4:39 ` Josh Poimboeuf 2021-06-17 4:39 ` Josh Poimboeuf 2021-06-17 4:40 ` Josh Poimboeuf 2021-06-17 4:40 ` Josh Poimboeuf 2021-06-17 14:40 ` Masami Hiramatsu 2021-06-17 14:40 ` Masami Hiramatsu 2021-06-17 15:02 ` Masami Hiramatsu 2021-06-17 15:02 ` Masami Hiramatsu 2021-06-17 17:45 ` Andrii Nakryiko 2021-06-17 17:45 ` Andrii Nakryiko 2021-06-17 18:21 ` Josh Poimboeuf 2021-06-17 18:21 ` Josh Poimboeuf 2021-06-17 18:31 ` Andrii Nakryiko 2021-06-17 18:31 ` Andrii Nakryiko 2021-06-17 19:26 ` Josh Poimboeuf 2021-06-17 19:26 ` Josh Poimboeuf 2021-06-17 19:46 ` Andrii Nakryiko 2021-06-17 19:46 ` Andrii Nakryiko 2021-06-18 0:33 ` Masami Hiramatsu 2021-06-18 0:33 ` Masami Hiramatsu 2021-06-18 1:03 ` Josh Poimboeuf 2021-06-18 1:03 ` Josh Poimboeuf 2021-06-17 23:58 ` Masami Hiramatsu 2021-06-17 23:58 ` Masami Hiramatsu 2021-06-18 0:58 ` Josh Poimboeuf 2021-06-18 0:58 ` Josh Poimboeuf 2021-05-27 6:40 ` [PATCH -tip v7 10/13] x86/kprobes: Push a fake return address at kretprobe_trampoline Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-06-17 4:41 ` Josh Poimboeuf 2021-06-17 4:41 ` Josh Poimboeuf 2021-05-27 6:40 ` [PATCH -tip v7 11/13] x86/unwind: Recover kretprobe trampoline entry Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-06-17 4:41 ` Josh Poimboeuf 2021-06-17 4:41 ` Josh Poimboeuf 2021-05-27 6:40 ` [PATCH -tip v7 12/13] tracing: Show kretprobe unknown indicator only for kretprobe_trampoline Masami Hiramatsu 2021-05-27 6:40 ` Masami Hiramatsu 2021-05-27 6:41 ` [PATCH -tip v7 13/13] x86/kprobes: Fixup return address in generic trampoline handler Masami Hiramatsu 2021-05-27 6:41 ` Masami Hiramatsu 2021-05-27 16:41 ` [PATCH -tip v7 00/13] kprobes: Fix stacktrace with kretprobes on x86 Andrii Nakryiko 2021-05-27 16:41 ` Andrii Nakryiko 2021-06-10 3:40 ` Masami Hiramatsu 2021-06-10 3:40 ` Masami Hiramatsu
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