From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E700C433FE for ; Wed, 29 Sep 2021 13:33:53 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id CAE946142A for ; Wed, 29 Sep 2021 13:33:52 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org CAE946142A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:35674 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mVZia-0006LK-1d for qemu-devel@archiver.kernel.org; Wed, 29 Sep 2021 09:33:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39554) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mVZIQ-0007aE-0v for qemu-devel@nongnu.org; Wed, 29 Sep 2021 09:06:52 -0400 Received: from mail-ot1-x32a.google.com ([2607:f8b0:4864:20::32a]:33309) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mVZIO-0006Q7-Dt for qemu-devel@nongnu.org; Wed, 29 Sep 2021 09:06:49 -0400 Received: by mail-ot1-x32a.google.com with SMTP id d12-20020a05683025cc00b0054d8486c6b8so2822749otu.0 for ; Wed, 29 Sep 2021 06:06:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=z6sdM0HHcKJX3xm0cdq26GIq2QyBnBfucTBir90HJQ8=; b=fChyf+60poumwB4KWy1JYYveh7q8+eXjWF484pqsz7vpfZmCOQxFadbX6gGrdKdnYN Ci3xEYmvVxQY0EEQE+etU/BjYApOKcIRkXQ2CSavKxT2u232Fr0VpNrkxXy4gLPCB0re xKJX8DiAG1/9LEP7/Gevx0n91Ck+YadF1FzGSol6TuX6asEmFTZ8o1OC76VAVAnSTVjn h+suH5QwBw1r2oqazzuX5o5UJjDvWTR3N5WJ9acwezj8Thb3GUuX5CLPO3XIznIfgOf1 CJ1Qi+m/A9VScTbTPeeVQPPXECWXiJJMIX1ln+u4tlxxpuh7ZK5zrpcTgpaX1NfkNoK4 EIPQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=z6sdM0HHcKJX3xm0cdq26GIq2QyBnBfucTBir90HJQ8=; b=scSnQzp2RnGQj62GKrbTOE2/XdKO4j/FYF+1FbAryYw+Lwogq/JzFRk1zGfsV2AmUW QzgQdDeLGl6C4vvE2+32vaLHh/vCKzrhhNsb4LbLocruYF1ulmUSM3QL6AKNboFEXQk0 CZ2QkiMSvk1IbPOAbzBA5Mq2kkjSv90snBWNqP1q171oW38d0qzgyX/zAtR32duWawvv KJ14H/CQ6aRaRUmmLE76lQ9/Mf0dWU+8Kng6DhfVrUyRb0S2ErpDFiBUeywxTqp0CMzL QJu80L8H+rcH6cvwua3LEHWifAzCiB3cSNOZiS2Zt+Ovmx4u7xNHnmwldkF0E+Oh1cNl c7mA== X-Gm-Message-State: AOAM532/JfBNvUBzOf2KkAvwZUG03AWtwVwZQuIozI36EtJCbmMUOv5K E5asph4xqtZ7CAlxiP3JR/pvJ+4NEC1FQg== X-Google-Smtp-Source: ABdhPJyb/z246KbbQcmSMSCLGSavrbNezmYAJD0KJ/qmQ+XyM9NFwpNP1LxQEpfzySxTFQqwAdrOBg== X-Received: by 2002:a05:6830:14ce:: with SMTP id t14mr10365204otq.250.1632920804843; Wed, 29 Sep 2021 06:06:44 -0700 (PDT) Received: from localhost.localdomain ([172.58.171.248]) by smtp.gmail.com with ESMTPSA id w1sm442823ote.41.2021.09.29.06.06.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Sep 2021 06:06:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v5 21/26] linux-user/s390x: Implement setup_sigtramp Date: Wed, 29 Sep 2021 09:05:48 -0400 Message-Id: <20210929130553.121567-22-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210929130553.121567-1-richard.henderson@linaro.org> References: <20210929130553.121567-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::32a; envelope-from=richard.henderson@linaro.org; helo=mail-ot1-x32a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-s390x@nongnu.org, alex.bennee@linaro.org, laurent@vivier.eu, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Create and record the two signal trampolines. Use them when the guest does not use SA_RESTORER. Cc: qemu-s390x@nongnu.org Tested-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- linux-user/s390x/target_signal.h | 2 ++ linux-user/s390x/signal.c | 24 ++++++++++++++++-------- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/linux-user/s390x/target_signal.h b/linux-user/s390x/target_signal.h index bbfc464d44..64f5f42201 100644 --- a/linux-user/s390x/target_signal.h +++ b/linux-user/s390x/target_signal.h @@ -19,4 +19,6 @@ typedef struct target_sigaltstack { #include "../generic/signal.h" #define TARGET_ARCH_HAS_SETUP_FRAME +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif /* S390X_TARGET_SIGNAL_H */ diff --git a/linux-user/s390x/signal.c b/linux-user/s390x/signal.c index 80f34086d7..676b948147 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -68,7 +68,6 @@ typedef struct { target_sigregs sregs; int signo; target_sigregs_ext sregs_ext; - uint16_t retcode; } sigframe; #define TARGET_UC_VXRS 2 @@ -85,7 +84,6 @@ struct target_ucontext { typedef struct { uint8_t callee_used_stack[__SIGNAL_FRAMESIZE]; - uint16_t retcode; struct target_siginfo info; struct target_ucontext uc; } rt_sigframe; @@ -209,9 +207,7 @@ void setup_frame(int sig, struct target_sigaction *ka, if (ka->sa_flags & TARGET_SA_RESTORER) { restorer = ka->sa_restorer; } else { - restorer = frame_addr + offsetof(sigframe, retcode); - __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, - &frame->retcode); + restorer = default_sigreturn; } /* Set up registers for signal handler */ @@ -262,9 +258,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, if (ka->sa_flags & TARGET_SA_RESTORER) { restorer = ka->sa_restorer; } else { - restorer = frame_addr + offsetof(typeof(*frame), retcode); - __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, - &frame->retcode); + restorer = default_rt_sigreturn; } /* Create siginfo on the signal stack. */ @@ -405,3 +399,17 @@ long do_rt_sigreturn(CPUS390XState *env) unlock_user_struct(frame, frame_addr, 0); return -TARGET_QEMU_ESIGRETURN; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint16_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 2 + 2, 0); + assert(tramp != NULL); + + default_sigreturn = sigtramp_page; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_sigreturn, &tramp[0]); + + default_rt_sigreturn = sigtramp_page + 2; + __put_user(S390_SYSCALL_OPCODE | TARGET_NR_rt_sigreturn, &tramp[1]); + + unlock_user(tramp, sigtramp_page, 2 + 2); +} -- 2.25.1