From patchwork Sun May 21 09:36:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 684689 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD3EFC77B73 for ; Sun, 21 May 2023 09:37:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230159AbjEUJhU (ORCPT ); Sun, 21 May 2023 05:37:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58284 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230168AbjEUJhH (ORCPT ); Sun, 21 May 2023 05:37:07 -0400 Received: from todd.t-8ch.de (todd.t-8ch.de [IPv6:2a01:4f8:c010:41de::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6B9C109; Sun, 21 May 2023 02:36:46 -0700 (PDT) From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1684661803; bh=lj2geLr/EdywhNVRdZihjVutdtlzdrTLYrnqWuCaRHI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=cFDVWF4VRJK30uYLVDvSQLOKcqHfOapaHKy+uCiYEHV8joFGCP1VNLTw5YTPsrZdu tKcAKkoYbj7IucjFJRilU2Xdy+lRiSR3cTBsitu86G2g61qPlvLRSWYVEYyWSjooCV 85iXyDnx1wO3gM4uzxU1VGrjVCV4siMhkPC8TJwY= Date: Sun, 21 May 2023 11:36:30 +0200 Subject: [PATCH 2/7] tools/nolibc: x86_64: disable stack protector for _start MIME-Version: 1.0 Message-Id: <20230521-nolibc-automatic-stack-protector-v1-2-dad6c80c51c1@weissschuh.net> References: <20230521-nolibc-automatic-stack-protector-v1-0-dad6c80c51c1@weissschuh.net> In-Reply-To: <20230521-nolibc-automatic-stack-protector-v1-0-dad6c80c51c1@weissschuh.net> To: Willy Tarreau , "Paul E. McKenney" , Shuah Khan , Paul Walmsley , Palmer Dabbelt , Albert Ou , Nathan Chancellor , Nick Desaulniers , Tom Rix Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-riscv@lists.infradead.org, llvm@lists.linux.dev, =?utf-8?q?Thomas_Wei?= =?utf-8?q?=C3=9Fschuh?= X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1684661802; l=1079; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=lj2geLr/EdywhNVRdZihjVutdtlzdrTLYrnqWuCaRHI=; b=JVbhHarzeBvvcx5vDuAxt69sG68MA2ijZHbow7ctpQ1HKfKs70ByaOsPMJGeyj+rVqnfqQVyk 1O4/8Fg7pOIBbY4WpL5JP7Mj+mvvpxTiEIflujBujsb3if9KDfDQVZN X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This was forgotten in the original submission. It is unknown why it worked for x86_64 on some compiler without this attribute. Reported-by: Willy Tarreau Closes: https://lore.kernel.org/lkml/20230520133237.GA27501@1wt.eu/ Fixes: 0d8c461adbc4 ("tools/nolibc: x86_64: add stackprotector support") Signed-off-by: Thomas Weißschuh --- tools/include/nolibc/arch-x86_64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/include/nolibc/arch-x86_64.h b/tools/include/nolibc/arch-x86_64.h index d98f6c89d143..e201af15e142 100644 --- a/tools/include/nolibc/arch-x86_64.h +++ b/tools/include/nolibc/arch-x86_64.h @@ -190,7 +190,7 @@ const unsigned long *_auxv __attribute__((weak)); * 2) The deepest stack frame should be zero (the %rbp). * */ -void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void) +void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protector)) _start(void) { __asm__ volatile ( #ifdef NOLIBC_STACKPROTECTOR