From patchwork Fri Mar 12 06:42:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 12133795 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6890C433DB for ; Fri, 12 Mar 2021 06:43:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B343E64F83 for ; Fri, 12 Mar 2021 06:43:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231933AbhCLGm6 (ORCPT ); Fri, 12 Mar 2021 01:42:58 -0500 Received: from mail.kernel.org ([198.145.29.99]:44292 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231420AbhCLGmp (ORCPT ); Fri, 12 Mar 2021 01:42:45 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 9A66064F80; Fri, 12 Mar 2021 06:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1615531364; bh=oub8oU5fuWVsuTJd+yXYklWg8cIhkZlVSztr+7X5nEQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b9fg0x5gYaRk3Y3vFjwXLhGHMNBreOff1r8WRlV+slxJH7wD5I/yXj944xALnHHT/ sPAfN+COCEwEyYQFWYnm5Mt2OWhE8klbrrRmS3lbnKtmnROXZiwsbbx6Z9gEPw8NHT 5HwwbobH0LjL5nHwFnDR0U3Dnow1Nsb8RphHhqOjcCMyeiFdkbk3yjVe1gTOujKUMo YibM4IxAZnO8G5t+kA+rWgb7spIeZT961PlZxI2NhOzRxntIQbU7t5nHXY52GUrKj6 rgsYFp3z9Zs1XOPEP0AhdJIf122c1S00EnCdXbFV+iI3efAqSdYHe/+hxWhLXmCesO cprlh8KUxIOdA== From: Masami Hiramatsu To: Steven Rostedt , Ingo Molnar Cc: X86 ML , Masami Hiramatsu , Daniel Xu , 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 Subject: [PATCH -tip v2 05/10] x86/kprobes: Add UNWIND_HINT_FUNC on kretprobe_trampoline code Date: Fri, 12 Mar 2021 15:42:39 +0900 Message-Id: <161553135897.1038734.7043989402295618036.stgit@devnote2> X-Mailer: git-send-email 2.25.1 In-Reply-To: <161553130371.1038734.7661319550287837734.stgit@devnote2> References: <161553130371.1038734.7661319550287837734.stgit@devnote2> User-Agent: StGit/0.19 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Josh Poimboeuf Add UNWIND_HINT_FUNC on kretporbe_trampoline code so that ORC information is generated on the kretprobe_trampoline correctly. Signed-off-by: Josh Poimboeuf --- [MH] Add patch description. --- arch/x86/include/asm/unwind_hints.h | 5 +++++ arch/x86/kernel/kprobes/core.c | 3 ++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/unwind_hints.h b/arch/x86/include/asm/unwind_hints.h index 8e574c0afef8..8b33674288ea 100644 --- a/arch/x86/include/asm/unwind_hints.h +++ b/arch/x86/include/asm/unwind_hints.h @@ -52,6 +52,11 @@ UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC .endm +#else + +#define UNWIND_HINT_FUNC \ + UNWIND_HINT(ORC_REG_SP, 8, UNWIND_HINT_TYPE_FUNC, 0) + #endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_UNWIND_HINTS_H */ diff --git a/arch/x86/kernel/kprobes/core.c b/arch/x86/kernel/kprobes/core.c index 3c00b773fe2e..e079eb487ecd 100644 --- a/arch/x86/kernel/kprobes/core.c +++ b/arch/x86/kernel/kprobes/core.c @@ -1023,6 +1023,7 @@ asm( /* We don't bother saving the ss register */ #ifdef CONFIG_X86_64 " pushq %rsp\n" + UNWIND_HINT_FUNC " pushfq\n" SAVE_REGS_STRING " movq %rsp, %rdi\n" @@ -1033,6 +1034,7 @@ asm( " popfq\n" #else " pushl %esp\n" + UNWIND_HINT_FUNC " pushfl\n" SAVE_REGS_STRING " movl %esp, %eax\n" @@ -1046,7 +1048,6 @@ asm( ".size kretprobe_trampoline, .-kretprobe_trampoline\n" ); NOKPROBE_SYMBOL(kretprobe_trampoline); -STACK_FRAME_NON_STANDARD(kretprobe_trampoline); /*