From: Masami Hiramatsu <mhiramat@kernel.org> To: Steven Rostedt <rostedt@goodmis.org>, Josh Poimboeuf <jpoimboe@redhat.com>, 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, Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@alien8.de>, Peter Zijlstra <peterz@infradead.org>, kernel-team@fb.com, yhs@fb.com, linux-ia64@vger.kernel.org, Abhishek Sagar <sagar.abhishek@gmail.com>, Andrii Nakryiko <andrii.nakryiko@gmail.com> Subject: [PATCH -tip v10 07/16] objtool: Ignore unwind hints for ignored functions Date: Thu, 29 Jul 2021 23:07:01 +0900 [thread overview] Message-ID: <162756762128.301564.14921395970626566365.stgit@devnote2> (raw) In-Reply-To: <162756755600.301564.4957591913842010341.stgit@devnote2> From: Josh Poimboeuf <jpoimboe@redhat.com> If a function is ignored, also ignore its hints. This is useful for the case where the function ignore is conditional on frame pointers, e.g. STACK_FRAME_NON_STANDARD_FP(). Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Masami Hiramatsu <mhiramat@kernel.org> --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index e5947fbb9e7a..67cbdcfcabae 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2909,7 +2909,7 @@ static int validate_unwind_hints(struct objtool_file *file, struct section *sec) } while (&insn->list != &file->insn_list && (!sec || insn->sec == sec)) { - if (insn->hint && !insn->visited) { + if (insn->hint && !insn->visited && !insn->ignore) { ret = validate_branch(file, insn->func, insn, state); if (ret && backtrace) BT_FUNC("<=== (hint)", insn);
WARNING: multiple messages have this Message-ID (diff)
From: Masami Hiramatsu <mhiramat@kernel.org> To: Steven Rostedt <rostedt@goodmis.org>, Josh Poimboeuf <jpoimboe@redhat.com>, 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, Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@alien8.de>, Peter Zijlstra <peterz@infradead.org>, kernel-team@fb.com, yhs@fb.com, linux-ia64@vger.kernel.org, Abhishek Sagar <sagar.abhishek@gmail.com>, Andrii Nakryiko <andrii.nakryiko@gmail.com> Subject: [PATCH -tip v10 07/16] objtool: Ignore unwind hints for ignored functions Date: Thu, 29 Jul 2021 14:07:01 +0000 [thread overview] Message-ID: <162756762128.301564.14921395970626566365.stgit@devnote2> (raw) In-Reply-To: <162756755600.301564.4957591913842010341.stgit@devnote2> From: Josh Poimboeuf <jpoimboe@redhat.com> If a function is ignored, also ignore its hints. This is useful for the case where the function ignore is conditional on frame pointers, e.g. STACK_FRAME_NON_STANDARD_FP(). Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Tested-by: Masami Hiramatsu <mhiramat@kernel.org> --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/check.c b/tools/objtool/check.c index e5947fbb9e7a..67cbdcfcabae 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2909,7 +2909,7 @@ static int validate_unwind_hints(struct objtool_file *file, struct section *sec) } while (&insn->list != &file->insn_list && (!sec || insn->sec = sec)) { - if (insn->hint && !insn->visited) { + if (insn->hint && !insn->visited && !insn->ignore) { ret = validate_branch(file, insn->func, insn, state); if (ret && backtrace) BT_FUNC("<== (hint)", insn);
next prev parent reply other threads:[~2021-07-29 14:09 UTC|newest] Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-29 14:05 [PATCH -tip v10 00/16] kprobes: Fix stacktrace with kretprobes on x86 Masami Hiramatsu 2021-07-29 14:05 ` Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 01/16] ia64: kprobes: Fix to pass correct trampoline address to the handler Masami Hiramatsu 2021-07-29 14:06 ` Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 02/16] kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_descriptor() Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 02/16] kprobes: treewide: Replace arch_deref_entry_point() with dereference_symbol_d Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 03/16] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handler() Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 03/16] kprobes: treewide: Remove trampoline_address from kretprobe_trampoline_handle Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 04/16] kprobes: treewide: Make it harder to refer kretprobe_trampoline directly Masami Hiramatsu 2021-07-29 14:06 ` Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 05/16] kprobes: Add kretprobe_find_ret_addr() for searching return address Masami Hiramatsu 2021-07-29 14:06 ` Masami Hiramatsu 2021-07-29 14:06 ` [PATCH -tip v10 06/16] objtool: Add frame-pointer-specific function ignore Masami Hiramatsu 2021-07-29 14:06 ` Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu [this message] 2021-07-29 14:07 ` [PATCH -tip v10 07/16] objtool: Ignore unwind hints for ignored functions Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 08/16] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline() Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 09/16] ARC: Add instruction_pointer_set() API Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 10/16] ia64: " Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 11/16] arm: kprobes: Make space for instruction pointer on stack Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 12/16] kprobes: Enable stacktrace from pt_regs in kretprobe handler Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:07 ` [PATCH -tip v10 13/16] x86/kprobes: Push a fake return address at kretprobe_trampoline Masami Hiramatsu 2021-07-29 14:07 ` Masami Hiramatsu 2021-07-29 14:08 ` [PATCH -tip v10 14/16] x86/unwind: Recover kretprobe trampoline entry Masami Hiramatsu 2021-07-29 14:08 ` Masami Hiramatsu 2021-07-29 14:08 ` [PATCH -tip v10 15/16] tracing: Show kretprobe unknown indicator only for kretprobe_trampoline Masami Hiramatsu 2021-07-29 14:08 ` Masami Hiramatsu 2021-07-29 14:08 ` [PATCH -tip v10 16/16] x86/kprobes: Fixup return address in generic trampoline handler Masami Hiramatsu 2021-07-29 14:08 ` Masami Hiramatsu 2021-07-29 23:35 ` [PATCH -tip v10 00/16] kprobes: Fix stacktrace with kretprobes on x86 Masami Hiramatsu 2021-07-29 23:35 ` Masami Hiramatsu 2021-08-24 5:12 ` Andrii Nakryiko 2021-08-24 5:12 ` Andrii Nakryiko 2021-08-24 5:32 ` Masami Hiramatsu 2021-08-24 5:32 ` Masami Hiramatsu 2021-09-13 17:14 ` Andrii Nakryiko 2021-09-13 17:14 ` Andrii Nakryiko 2021-09-14 0:38 ` Masami Hiramatsu 2021-09-14 0:38 ` Masami Hiramatsu 2021-09-14 1:36 ` Andrii Nakryiko 2021-09-14 1:36 ` Andrii Nakryiko 2021-09-14 5:10 ` Masami Hiramatsu 2021-09-14 5:10 ` Masami Hiramatsu 2021-08-29 14:22 ` [RFC PATCH 0/1] Non stack-intrusive return probe event Masami Hiramatsu 2021-08-29 14:22 ` Masami Hiramatsu 2021-08-29 14:22 ` [RFC PATCH 1/1] [PoC] tracing: kprobe: Add non-stack intrusion " Masami Hiramatsu 2021-08-29 14:22 ` Masami Hiramatsu 2021-08-30 19:04 ` [RFC PATCH 0/1] Non stack-intrusive " Andrii Nakryiko 2021-08-30 19:04 ` Andrii Nakryiko 2021-08-31 6:06 ` Masami Hiramatsu 2021-08-31 6:06 ` Masami Hiramatsu
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