From patchwork Wed Aug 3 10:30:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jiaxun Yang X-Patchwork-Id: 12935392 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id BB045C19F28 for ; Wed, 3 Aug 2022 10:39:55 +0000 (UTC) Received: from localhost ([::1]:40924 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oJBn8-0007dN-Na for qemu-devel@archiver.kernel.org; Wed, 03 Aug 2022 06:39:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39088) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJBdv-00015c-Ti for qemu-devel@nongnu.org; Wed, 03 Aug 2022 06:30:25 -0400 Received: from out3-smtp.messagingengine.com ([66.111.4.27]:42325) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oJBdu-0003mq-30 for qemu-devel@nongnu.org; Wed, 03 Aug 2022 06:30:23 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.nyi.internal (Postfix) with ESMTP id B86B95C018B; Wed, 3 Aug 2022 06:30:19 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Wed, 03 Aug 2022 06:30:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flygoat.com; h= cc:cc:content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm1; t=1659522619; x= 1659609019; bh=km60XCfeDaX92zG6kQnllL/PZWX/QXobHnRBmi7f78w=; b=N jU7xpKImPMtLOwMV0AWvlbGkmSa+TB5NGPiypfCKztrp854lOI2/foa4kHqY/rpm PdqYYW2jXVRV6yOp8q8jDHhBOXjXDWeeA9bZNh/y+3Y7Xe0bn9ya3/nbz7qgWYv1 ewpnpIl69emTBa6jb9UoSOhf45A9qCRfXIUyHBMyDxCbhEjUEowogwiWdc096ryJ /yRRBN2tJFTO6uDnWtW4vBtgSAUvgYuu8m40zl2+NlAmZi5Z5clL/QdhmK9Bb4uV RChA0BxnTUGI/vHCa3u4JfzLx4pIUXVQ1Iadp+OmYK69L+5lDCi+jHy6buGwKFpF StOXS8cShS5r4Uo7VbAaw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:date:date:feedback-id:feedback-id:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm3; t=1659522619; x= 1659609019; bh=km60XCfeDaX92zG6kQnllL/PZWX/QXobHnRBmi7f78w=; b=X XRp4xhu2wEH02nplTMPVAFWmyMyfceDZN01LjeCTvsNSxGG64dsUDKUN1LswUthP Ai6HKDUOxnszJ5XFXtTB8rdnm1Cfp/7eYtGY/YuQGaawfBJJk+pQV3DzUkH7bksU ppLgB9qTPe8CfnUWVuvwGZUXQABN9ROuhKGAOi8wbnbpzBgWBnjwWqju9dri0HvY 9SwXEuPNxVwYUGRo4+ZQKBi9WeHFbZCqF1cNUEMQZbETLQ9YzKcqAtYdCsXVgql1 ojMhaSKANi0dyHD3LeIIIPc449ks02syFfN6S/xqgbBxwNibJ5ocJ2C9koyIK1t5 qD26UOl1jJCLMpBnbZsWQ== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvfedrvddvjedgvdekucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefhvfevufffkffojghfgggtgfesth ekredtredtjeenucfhrhhomheplfhirgiguhhnucgjrghnghcuoehjihgrgihunhdrhigr nhhgsehflhihghhorghtrdgtohhmqeenucggtffrrghtthgvrhhnpeevfedtffekjeefff ejtdduvddujeefvdejleeutdeufefffedtueevvdduveejffenucevlhhushhtvghrufhi iigvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpehjihgrgihunhdrhigrnhhgsehflh ihghhorghtrdgtohhm X-ME-Proxy: Feedback-ID: ifd894703:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 3 Aug 2022 06:30:18 -0400 (EDT) From: Jiaxun Yang To: laurent@vivier.eu Cc: f4bug@amsat.org, qemu-devel@nongnu.org, Jiaxun Yang Subject: [PATCH v2 1/2] linux-user: Introduce stubs for ELF AT_BASE_PLATFORM Date: Wed, 3 Aug 2022 11:30:08 +0100 Message-Id: <20220803103009.95972-2-jiaxun.yang@flygoat.com> X-Mailer: git-send-email 2.32.1 (Apple Git-133) In-Reply-To: <20220803103009.95972-1-jiaxun.yang@flygoat.com> References: <20220803103009.95972-1-jiaxun.yang@flygoat.com> MIME-Version: 1.0 Received-SPF: pass client-ip=66.111.4.27; envelope-from=jiaxun.yang@flygoat.com; helo=out3-smtp.messagingengine.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" AT_BASE_PLATFORM is a elf auxiliary vector pointing to a string to pass some architecture information. See getauxval(3) man-page. Signed-off-by: Jiaxun Yang Reviewed-by: Philippe Mathieu-Daudé --- linux-user/elfload.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index ce902dbd56..e7666c5c60 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1718,6 +1718,10 @@ static inline void init_thread(struct target_pt_regs *regs, #endif /* TARGET_HEXAGON */ +#ifndef ELF_BASE_PLATFORM +#define ELF_BASE_PLATFORM (NULL) +#endif + #ifndef ELF_PLATFORM #define ELF_PLATFORM (NULL) #endif @@ -2148,8 +2152,8 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, int i; abi_ulong u_rand_bytes; uint8_t k_rand_bytes[16]; - abi_ulong u_platform; - const char *k_platform; + abi_ulong u_platform, u_base_platform; + const char *k_platform, *k_base_platform; const int n = sizeof(elf_addr_t); sp = p; @@ -2171,6 +2175,22 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, } } + u_base_platform = 0; + k_base_platform = ELF_BASE_PLATFORM; + if (k_base_platform) { + size_t len = strlen(k_base_platform) + 1; + if (STACK_GROWS_DOWN) { + sp -= (len + n - 1) & ~(n - 1); + u_base_platform = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_base_platform, len); + } else { + memcpy_to_target(sp, k_base_platform, len); + u_base_platform = sp; + sp += len + 1; + } + } + u_platform = 0; k_platform = ELF_PLATFORM; if (k_platform) { @@ -2212,6 +2232,8 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, } size = (DLINFO_ITEMS + 1) * 2; + if (k_base_platform) + size += 2; if (k_platform) size += 2; #ifdef DLINFO_ARCH_ITEMS @@ -2289,6 +2311,9 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2); #endif + if (u_base_platform) { + NEW_AUX_ENT(AT_BASE_PLATFORM, u_base_platform); + } if (u_platform) { NEW_AUX_ENT(AT_PLATFORM, u_platform); }