From patchwork Fri May 21 12:37:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Weimer X-Patchwork-Id: 43520 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id A49CC384603D; Fri, 21 May 2021 12:37:14 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A49CC384603D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1621600634; bh=2JPKxKnbUS22kAMBE4GYb4lEv9Dg/AvfU2fRBE6oV9M=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:From; b=i6Gs1DMBBvlaxDtEReuOL4KHfg69DWyoFJKJW1NAT8nkY3oxFiGjTQQ5ZPtS5PyWk Y9jEHDO5W21m31Ieb+FQeGiHTFg4zPTXXhE4QJFNRTuo+6n1lLRBodA2IG5VaRMq2P mgDM5b9cyhq1lBhkuMFsw8AU+OjZolNFCzSJqAuA= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTP id 710F33858025 for ; Fri, 21 May 2021 12:37:12 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 710F33858025 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-290-2rzed1Y2MlyI_r3S-o5CsQ-1; Fri, 21 May 2021 08:37:10 -0400 X-MC-Unique: 2rzed1Y2MlyI_r3S-o5CsQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id C7638BBEE1 for ; Fri, 21 May 2021 12:37:09 +0000 (UTC) Received: from oldenburg.str.redhat.com (ovpn-113-228.ams2.redhat.com [10.36.113.228]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 31F2361093 for ; Fri, 21 May 2021 12:37:08 +0000 (UTC) To: libc-alpha@sourceware.org Subject: [PATCH v2 0/2] Convenience function for allocating (alternate signal) stacks X-From-Line: 9abea57b88df1181ba27a00db6f462ad3fe92f1d Mon Sep 17 00:00:00 2001 Message-Id: Date: Fri, 21 May 2021 14:37:07 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Florian Weimer via Libc-alpha From: Florian Weimer Reply-To: Florian Weimer Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" The new version actually allocates guard regions (with a test) and swaps the place of the top and bottom regions (top ~ top of stack, so it's on lower addresses on most architectures). I committed the approved patches and implemented the generic sysconf_sigstksz variant, as Andreas suggested. Tested on i686-linux-gnu and x86_64-linux-gnu. Florian Weimer (2): Add generic version of sysconf_sigstksz misc: Add and the cstack_* family of functions NEWS | 4 + include/sys/cstack.h | 39 ++++ manual/memory.texi | 99 ++++++++++ manual/signal.texi | 3 + misc/Makefile | 8 +- misc/Versions | 5 + misc/cstack_allocate.c | 121 ++++++++++++ misc/cstack_free.c | 35 ++++ misc/cstack_get.c | 27 +++ misc/sys/cstack.h | 53 ++++++ misc/tst-cstack.c | 176 ++++++++++++++++++ sysdeps/generic/sysconf-sigstksz.h | 25 +++ sysdeps/mach/hurd/i386/libc.abilist | 3 + sysdeps/unix/sysv/linux/aarch64/libc.abilist | 3 + sysdeps/unix/sysv/linux/alpha/libc.abilist | 3 + sysdeps/unix/sysv/linux/arc/libc.abilist | 3 + sysdeps/unix/sysv/linux/arm/be/libc.abilist | 3 + sysdeps/unix/sysv/linux/arm/le/libc.abilist | 3 + sysdeps/unix/sysv/linux/csky/libc.abilist | 3 + sysdeps/unix/sysv/linux/hppa/libc.abilist | 3 + sysdeps/unix/sysv/linux/i386/libc.abilist | 3 + sysdeps/unix/sysv/linux/ia64/libc.abilist | 3 + .../sysv/linux/m68k/coldfire/libc.abilist | 3 + .../unix/sysv/linux/m68k/m680x0/libc.abilist | 3 + .../sysv/linux/microblaze/be/libc.abilist | 3 + .../sysv/linux/microblaze/le/libc.abilist | 3 + .../sysv/linux/mips/mips32/fpu/libc.abilist | 3 + .../sysv/linux/mips/mips32/nofpu/libc.abilist | 3 + .../sysv/linux/mips/mips64/n32/libc.abilist | 3 + .../sysv/linux/mips/mips64/n64/libc.abilist | 3 + sysdeps/unix/sysv/linux/nios2/libc.abilist | 3 + .../linux/powerpc/powerpc32/fpu/libc.abilist | 3 + .../powerpc/powerpc32/nofpu/libc.abilist | 3 + .../linux/powerpc/powerpc64/be/libc.abilist | 3 + .../linux/powerpc/powerpc64/le/libc.abilist | 3 + .../unix/sysv/linux/riscv/rv32/libc.abilist | 3 + .../unix/sysv/linux/riscv/rv64/libc.abilist | 3 + .../unix/sysv/linux/s390/s390-32/libc.abilist | 3 + .../unix/sysv/linux/s390/s390-64/libc.abilist | 3 + sysdeps/unix/sysv/linux/sh/be/libc.abilist | 3 + sysdeps/unix/sysv/linux/sh/le/libc.abilist | 3 + .../sysv/linux/sparc/sparc32/libc.abilist | 3 + .../sysv/linux/sparc/sparc64/libc.abilist | 3 + .../unix/sysv/linux/x86_64/64/libc.abilist | 3 + .../unix/sysv/linux/x86_64/x32/libc.abilist | 3 + 45 files changed, 691 insertions(+), 3 deletions(-) create mode 100644 include/sys/cstack.h create mode 100644 misc/cstack_allocate.c create mode 100644 misc/cstack_free.c create mode 100644 misc/cstack_get.c create mode 100644 misc/sys/cstack.h create mode 100644 misc/tst-cstack.c create mode 100644 sysdeps/generic/sysconf-sigstksz.h