From patchwork Thu Jan 28 00:50:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 12051343 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=-17.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 A0B4EC433E6 for ; Thu, 28 Jan 2021 00:54:00 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4FC9961492 for ; Thu, 28 Jan 2021 00:54:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4FC9961492 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=+mV1kIsWLrHC5rSBkBG/qGhj+ZYnSe9XXwN69z1ODQk=; b=ULH8SLG5jPGbAT7BznyWX6W27 4xshsy9E4A29OoZphGDOfuOajdV0d4U0llUXVnW2nkh5YaY3/Zkh3X7pYlYVu4BWo/2/2CAoX/S/4 pcmNxl+ardTOm/BmFkMkFg2ByvMCJYHm1W1pprykyK//k4ZjIHNlHT+OgTbaQ+A1C5QsNFkEVSvyu nF239AXXCa4mRx43iCCGP3NEdGtX1KYCfuVy9sSbDtlki1m7snQ7O3AtiiuKBSE+eddYL80RZE2pd 3a803UB60Ij0oS2AYGVZu4sfyRO2uKUu4YLLihUym1pqY8L75uzxIHWtrYRn7AhGRJZIPIj7LOlp+ uGzN5NgVA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4vY7-0007e8-Jx; Thu, 28 Jan 2021 00:52:39 +0000 Received: from conuserg-12.nifty.com ([210.131.2.79]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4vXl-0007YY-Vo; Thu, 28 Jan 2021 00:52:22 +0000 Received: from oscar.flets-west.jp (softbank126026094251.bbtec.net [126.26.94.251]) (authenticated) by conuserg-12.nifty.com with ESMTP id 10S0pjIZ024172; Thu, 28 Jan 2021 09:51:50 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-12.nifty.com 10S0pjIZ024172 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1611795111; bh=xfUMpPHMW1i+7E5Ee4SBhF1anYC2XCsj+hKMg2Rt8Gk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F+klgDhGqjPkW0iyljZtDS/UVVookoKMar9wbf4BweDN3xyA6byQpu9mcEEUtCPXr 5Em1w71Sr4WmKw8UMJaHxg3Y6MP5Hquxu+aJ6aDLe5mi0bJllocGuR5nubDzp89f1N ZTIUFIoM/8w9fZDq6mot9Gvb+SafgOabPs5htRub+OqIYi3STKdebYBgO4x7pbnHe2 VZkfgtX2BHgbXDMMLkA9iKXN+H+PrVkaYfjLsYCMZ8fIDFjrqpY19b9ztBNvyLQV23 e08U3RVcWC+e2J6L6nyDK/8a+LetbQM5v4IzJ4hvr77kc/bebiilTElVi1wC1EWUl2 gFfoK2caGKw7Q== X-Nifty-SrcIP: [126.26.94.251] From: Masahiro Yamada To: linux-arch@vger.kernel.org, x86@kernel.org Subject: [PATCH 04/27] x86/entry/x32: rename __x32_compat_sys_* to __x64_compat_sys_* Date: Thu, 28 Jan 2021 09:50:46 +0900 Message-Id: <20210128005110.2613902-5-masahiroy@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210128005110.2613902-1-masahiroy@kernel.org> References: <20210128005110.2613902-1-masahiroy@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210127_195218_792162_FFE6EDB4 X-CRM114-Status: GOOD ( 12.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-xtensa@linux-xtensa.org, linux-ia64@vger.kernel.org, linux-parisc@vger.kernel.org, linux-kbuild@vger.kernel.org, Masahiro Yamada , linux-sh@vger.kernel.org, linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-alpha@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In arch/x86/entry/syscall_x32.c, the macros are mapped to symbols as follows: __SYSCALL_COMMON(nr, sym) --> __x64_ __SYSCALL_X32(nr, sym) --> __x32_ Originally, the syscalls in the x32 special range (512-547) were all compat. This assumption is now broken after the following commits: 55db9c0e8534 ("net: remove compat_sys_{get,set}sockopt") 5f764d624a89 ("fs: remove the compat readv/writev syscalls") 598b3cec831f ("fs: remove compat_sys_vmsplice") c3973b401ef2 ("mm: remove compat_process_vm_{readv,writev}") Those commits redefined __x32_sys_* to __x64_sys_* because there is no stub like __x32_sys_*. I think defining as follows is sensible and cleaner. __SYSCALL_COMMON(nr, sym) --> __x64_ __SYSCALL_X32(nr, sym) --> __x64_ The ugly #define __x32_sys_* will go away. Signed-off-by: Masahiro Yamada --- arch/x86/entry/syscall_x32.c | 16 ++-------------- arch/x86/include/asm/syscall_wrapper.h | 10 +++++----- 2 files changed, 7 insertions(+), 19 deletions(-) diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c index f2fe0a33bcfd..3fea8fb9cd6a 100644 --- a/arch/x86/entry/syscall_x32.c +++ b/arch/x86/entry/syscall_x32.c @@ -8,27 +8,15 @@ #include #include -/* - * Reuse the 64-bit entry points for the x32 versions that occupy different - * slots in the syscall table. - */ -#define __x32_sys_readv __x64_sys_readv -#define __x32_sys_writev __x64_sys_writev -#define __x32_sys_getsockopt __x64_sys_getsockopt -#define __x32_sys_setsockopt __x64_sys_setsockopt -#define __x32_sys_vmsplice __x64_sys_vmsplice -#define __x32_sys_process_vm_readv __x64_sys_process_vm_readv -#define __x32_sys_process_vm_writev __x64_sys_process_vm_writev - #define __SYSCALL_64(nr, sym) -#define __SYSCALL_X32(nr, sym) extern long __x32_##sym(const struct pt_regs *); +#define __SYSCALL_X32(nr, sym) extern long __x64_##sym(const struct pt_regs *); #define __SYSCALL_COMMON(nr, sym) extern long __x64_##sym(const struct pt_regs *); #include #undef __SYSCALL_X32 #undef __SYSCALL_COMMON -#define __SYSCALL_X32(nr, sym) [nr] = __x32_##sym, +#define __SYSCALL_X32(nr, sym) [nr] = __x64_##sym, #define __SYSCALL_COMMON(nr, sym) [nr] = __x64_##sym, asmlinkage const sys_call_ptr_t x32_sys_call_table[__NR_x32_syscall_max+1] = { diff --git a/arch/x86/include/asm/syscall_wrapper.h b/arch/x86/include/asm/syscall_wrapper.h index 80c08c7d5e72..6a2827d0681f 100644 --- a/arch/x86/include/asm/syscall_wrapper.h +++ b/arch/x86/include/asm/syscall_wrapper.h @@ -17,7 +17,7 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); * __x64_sys_*() - 64-bit native syscall * __ia32_sys_*() - 32-bit native syscall or common compat syscall * __ia32_compat_sys_*() - 32-bit compat syscall - * __x32_compat_sys_*() - 64-bit X32 compat syscall + * __x64_compat_sys_*() - 64-bit X32 compat syscall * * The registers are decoded according to the ABI: * 64-bit: RDI, RSI, RDX, R10, R8, R9 @@ -166,17 +166,17 @@ extern long __ia32_sys_ni_syscall(const struct pt_regs *regs); * with x86_64 obviously do not need such care. */ #define __X32_COMPAT_SYS_STUB0(name) \ - __SYS_STUB0(x32, compat_sys_##name) + __SYS_STUB0(x64, compat_sys_##name) #define __X32_COMPAT_SYS_STUBx(x, name, ...) \ - __SYS_STUBx(x32, compat_sys##name, \ + __SYS_STUBx(x64, compat_sys##name, \ SC_X86_64_REGS_TO_ARGS(x, __VA_ARGS__)) #define __X32_COMPAT_COND_SYSCALL(name) \ - __COND_SYSCALL(x32, compat_sys_##name) + __COND_SYSCALL(x64, compat_sys_##name) #define __X32_COMPAT_SYS_NI(name) \ - __SYS_NI(x32, compat_sys_##name) + __SYS_NI(x64, compat_sys_##name) #else /* CONFIG_X86_X32 */ #define __X32_COMPAT_SYS_STUB0(name) #define __X32_COMPAT_SYS_STUBx(x, name, ...)