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 X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,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 E835EC07E96 for ; Wed, 7 Jul 2021 00:08:49 +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 6C6CB61C3C for ; Wed, 7 Jul 2021 00:08:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6C6CB61C3C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45088 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0v7Q-0002D8-ID for qemu-devel@archiver.kernel.org; Tue, 06 Jul 2021 20:08:48 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53520) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0upQ-0001wA-I1 for qemu-devel@nongnu.org; Tue, 06 Jul 2021 19:50:12 -0400 Received: from mail-pg1-x532.google.com ([2607:f8b0:4864:20::532]:43907) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1m0up9-0006hE-I7 for qemu-devel@nongnu.org; Tue, 06 Jul 2021 19:50:12 -0400 Received: by mail-pg1-x532.google.com with SMTP id o18so384221pgu.10 for ; Tue, 06 Jul 2021 16:49:55 -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=+jVFzflzGymDZrI1ZoMIgTCB/1BSyil5/+M6JPmFwtc=; b=RqHn1ecFuSdrWAHUFWjD6xuV93TMVllL5lkfak3aXPq0AoiDCwPPIVWoRZrHwXHW5+ ZJjCPkqrCybaDSgoGXPGy827fiK6BS9WC5Y9VixkEGTqg1x/Wwnvtl6xS2ZSxIPDmgRM uk6MYM+3q/r4WOLvfOyiK7Adhw/llnnscMFHfQEwceeGsXp5iSyezGz17J+H8mFASu5f tcd76k9kzukkeYhTiQlkSe2YWrKGd4uxCed5ipfrDJEaB4mcBxkCMQ3gqsuyFcG7/Zom SmJh6BdAv+gfvg49rCaezf46lMVtJWGPF+oCYTmgr/liivFKdKmkbxp0Ee0ClCcBrP5v jqEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=+jVFzflzGymDZrI1ZoMIgTCB/1BSyil5/+M6JPmFwtc=; b=jUCKbzMvaKJCYoW54pmu7+8b8+c0zjG5rCni9iIP3lAWwUcJxvYnFNCsTGurgEf16c pm09IJ77anjCpRjZNkaZZGa4jimXc7k6Yczh9URj2RfcVjhMuHIERVh1Ye22sjza/psf J/0zDAcN4QyXvfM1GDs0DkkdC1QEbKuEVIAtOaB+dEHuBzvEvW3zMdhhaheVd/YjISsL TBQWLEjOuMfZjNXx8AKGhDlfz8+bn2TaYKVlRDUkYXNBtrXIXVD2Xs+GqqPgPU4HBVFv 2DqY2iq6DwW3FcPbVTHOtP6JoAda9OHYADkZRb+5xa2YAYCwJ9wjEH3ovkP7xWnmCEan 6cdA== X-Gm-Message-State: AOAM532y5faxEeFGThaS+42SC3VvBmn+jzV7sOSQIsF+G3TNpk5s/xlR oZyVSVUgu46zjxqcwaq7Yskuk7mMncsFeA== X-Google-Smtp-Source: ABdhPJz71YnaWT10o4Dl97VyWRsGCvt+FC5BzdVs2+AXTYIfrLemocP5dMSngio4F4u1nDRVsj6RMw== X-Received: by 2002:a65:63ce:: with SMTP id n14mr23080785pgv.273.1625615394360; Tue, 06 Jul 2021 16:49:54 -0700 (PDT) Received: from localhost.localdomain ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id b3sm18058114pfi.179.2021.07.06.16.49.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jul 2021 16:49:54 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 33/36] linux-user/s390x: Implement setup_sigtramp Date: Tue, 6 Jul 2021 16:49:29 -0700 Message-Id: <20210706234932.356913-34-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210706234932.356913-1-richard.henderson@linaro.org> References: <20210706234932.356913-1-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::532; envelope-from=richard.henderson@linaro.org; helo=mail-pg1-x532.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=ham 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 bf8a8fbfe9..18b1997f1e 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -67,7 +67,6 @@ typedef struct { target_sigregs sregs; int signo; target_sigregs_ext sregs_ext; - uint16_t retcode; } sigframe; #define TARGET_UC_VXRS 2 @@ -84,7 +83,6 @@ 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; @@ -208,9 +206,7 @@ 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 */ @@ -261,9 +257,7 @@ 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. */ @@ -404,3 +398,17 @@ 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