From patchwork Tue Oct 13 00:31:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 11834557 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ADC4592C for ; Tue, 13 Oct 2020 00:33:10 +0000 (UTC) Received: from mother.openwall.net (mother.openwall.net [195.42.179.200]) by mail.kernel.org (Postfix) with SMTP id F1F8F218AC for ; Tue, 13 Oct 2020 00:33:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IdXB04m+" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F1F8F218AC Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernel-hardening-return-20179-patchwork-kernel-hardening=patchwork.kernel.org@lists.openwall.com Received: (qmail 12081 invoked by uid 550); 13 Oct 2020 00:32:30 -0000 Mailing-List: contact kernel-hardening-help@lists.openwall.com; run by ezmlm Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-ID: Delivered-To: mailing list kernel-hardening@lists.openwall.com Received: (qmail 11982 invoked from network); 13 Oct 2020 00:32:29 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=xL7tn5bk8rd7QhzERnW5XDCxrWNQLuaGbP7lLdALs6Y=; b=IdXB04m+VIhq9Ywfk+Q6SdQxAtxltKDIhWNIfo+jhdLwgrlbdcpJkCD1dg60k4KicG 1IgqLYFzJP4YEVrqWrx9pldSCsrIUIQZ+WBgBNy02BbQgKQE7dyYmjEiSSvKFbyI2xXj TV/V2tWK25kaN3vgAN5S+M0sENDBoc3aH1FQDGeTof6qqw+rbjH3bLU8q4fusukkB6D6 mAux60p4YIG3jSjYIx2pWv96v7XCJ9hy4Ka8a16xDIx9CMpYSDwuHtmOn9Zpz0sBYoxo n76+DpbDHdACleamKfcxERH+Pqgb3G4b5AAOxxW5ydqXddcuIHi5FDSPpeBjiqI6FIaq F5XQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=xL7tn5bk8rd7QhzERnW5XDCxrWNQLuaGbP7lLdALs6Y=; b=Fkdh3VI10Ho1sNEugBA/6r8lBfyazxJPwMlRGqEVFPBIWXalh7RZdOPbNYXej23Boj /hQkKubItDD86umsQoCdRiSdbqRbZ4FQYYwWoWKnOyo+Lo6CS3oEd0tZumtKApNCrYBG x3onJlALKnHyE2g/pQ/tb3zNrx1HYPf59dz0CZzUkMrRr0HYptT+UCPYI1WBFXRr6IPa kj7HGYz+2Ljap0cnsaMV5KGoTqh9I/eLLhpmdZkjn6qtC5kCL1hj5MK6UV8eINlE4gJK tZlD1+Zaedy/BrKCwTd7kLPXcdJ0n4pN+aPI/5Y751Eg8R9+e4GBMvDHv5HfKZ8h3zLy cEkg== X-Gm-Message-State: AOAM532xEjdT1otfvDaxz7qX9iZn0fVJc4o2usfZY3BLKsWXpC+0xTsG YsKkhN6nxr4Qm9kF6kd1t4i5WKBcxYRPC4mD/aA= X-Google-Smtp-Source: ABdhPJzmHD4XCersd5eY8ZPVkbKw3ea3PfM0fSiP3AGN8FM08tkamilxzFI74ZhTfsYbcW37PW4YYLWgNBpJiUusVu4= Sender: "samitolvanen via sendgmr" X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:f693:9fff:fef4:1b6d]) (user=samitolvanen job=sendgmr) by 2002:aa7:9a87:0:b029:156:5806:b478 with SMTP id w7-20020aa79a870000b02901565806b478mr3079925pfi.8.1602549137181; Mon, 12 Oct 2020 17:32:17 -0700 (PDT) Date: Mon, 12 Oct 2020 17:31:44 -0700 In-Reply-To: <20201013003203.4168817-1-samitolvanen@google.com> Message-Id: <20201013003203.4168817-7-samitolvanen@google.com> Mime-Version: 1.0 References: <20201013003203.4168817-1-samitolvanen@google.com> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog Subject: [PATCH v6 06/25] x86, build: use objtool mcount From: Sami Tolvanen To: Masahiro Yamada , Steven Rostedt Cc: Will Deacon , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen Select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION is selected to use objtool to generate __mcount_loc sections for dynamic ftrace with Clang and gcc <5 (later versions of gcc use -mrecord-mcount). Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- arch/x86/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5e832fd520b5..6d67646153bc 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -163,6 +163,7 @@ config X86 select HAVE_CMPXCHG_LOCAL select HAVE_CONTEXT_TRACKING if X86_64 select HAVE_C_RECORDMCOUNT + select HAVE_OBJTOOL_MCOUNT if STACK_VALIDATION select HAVE_DEBUG_KMEMLEAK select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE