From patchwork Fri Jun 18 19:29:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 463082 Delivered-To: patch@linaro.org Received: by 2002:a05:6638:102:0:0:0:0 with SMTP id x2csp176152jao; Fri, 18 Jun 2021 12:39:28 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyJWKzbDJfyvmn91vo+w/nCdevWlSPqVaRHYtrAb9ENDj7Fv0g9cufTHXKmzvXlMiwxHAcA X-Received: by 2002:a05:6102:3123:: with SMTP id f3mr8628064vsh.50.1624045168690; Fri, 18 Jun 2021 12:39:28 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1624045168; cv=none; d=google.com; s=arc-20160816; b=quYswGrKEoQyzR6sPo5JU/qlS+wmnptkTKhmF6QiouMDxwZq8ckbM6m/Y013Pd+CDI L2AyMhawGCXrPvTL2E4BFV9Q3dk6zEEB9uIZ5N5mocEEN5xD6hql3B2EFMoVGamTeVPi NV+3dIuVBwHKrnqWzzvuw3KqOsbNOI4Pvw/WXbUJgCy4JkogMLesl4Hh2Wm6qCwnnMPB xadLP+VpzzjXLVisieM8nBGo5egOkI+bfQXUsy7+VrLdHEVY92FJK5nAlUwxOpw7ygrI +7pLP6TjxnQ3WAwOEJtIqhpow1su2dnAnVWbLM5aD9wvzqgBYkB8ebdtHCRFufoB2zu/ SkaA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:to:from :dkim-signature; bh=NC4wjKEI8ei8zXE+8oh5v+0BndNCvCJb6FftDxcNOnE=; b=zgbGnhqAP9Ac2qXn5Yr9Mn9qC7/lsQhBbGW5vDk3VyKbQjek0wH29PwfuRaSzY7ds6 YlZvSELlM5GwMqFsFhCvv7pMs05tj5nVJoDMDpIF5RcchXm3BI2nPl+8L8GI8QIdhmMc UNeSFpo33B6SNOoV1ENhZHZ4CojXOTlebRvaGn2soZqK0fWWf/IscnTNhG1U0DA8SXro ogqwVf/eaPeGpeto06+Ak9RRQgS6dSmAxzfxrcRUfJpdg6KkzR/xvveFQTZcHkdiS6GX EQVtvPEQWs7Tg8E155XeNK9XSCXw3KSZdHBx6iwKlhfH8WD8uyNssjhzeQwGikaIsVF4 406A== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@linaro.org header.s=google header.b=T4b3zjm0; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id w187si7686659vkh.28.2021.06.18.12.39.28 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Fri, 18 Jun 2021 12:39:28 -0700 (PDT) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@linaro.org header.s=google header.b=T4b3zjm0; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1]:57458 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1luKKu-0004o6-1K for patch@linaro.org; Fri, 18 Jun 2021 15:39:28 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:58436) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1luKBu-0001iz-4x for qemu-devel@nongnu.org; Fri, 18 Jun 2021 15:30:14 -0400 Received: from mail-pl1-x632.google.com ([2607:f8b0:4864:20::632]:39768) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1luKBo-0001ZW-PG for qemu-devel@nongnu.org; Fri, 18 Jun 2021 15:30:09 -0400 Received: by mail-pl1-x632.google.com with SMTP id o21so5193506pll.6 for ; Fri, 18 Jun 2021 12:30:04 -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=NC4wjKEI8ei8zXE+8oh5v+0BndNCvCJb6FftDxcNOnE=; b=T4b3zjm0jvUgmrtHPiEx74l1HZZC6n7bYilccyY3ECmRzfdVL+oGYlndRJCa5P5jeB uJS/6R519bzMeuU+ALMMGUecghY8xsopn83C8EEOUJBHYHucbWgT2RXZIQT8sbW5Az+u FECcffJnwW+3f89wJRjujB/UKIceweW7xxTO8KA6vGNMb2zUIybWGI4kBTUb2qLvCF8w H1BcBO/mj/r1MXvI/Ktovo0A3482XGm0/GMZAo4YlFYvNnnY1lUI0qUPWYUiRHsuNgNj FAlUHU3HXZLAeVaeIA4qn15ipn55Oc/YviLnDXEcfgfYYBoL5ymwvVknd5ejxMhQUqYB y6Wg== 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=NC4wjKEI8ei8zXE+8oh5v+0BndNCvCJb6FftDxcNOnE=; b=ayuFdT0KIyU+1QoRCyDvSNqGIkZsIhLjLZt0nbNjbAZjFx7AZtVHNd0F0BsGFn7eHa 72oT7wPFTcqHYiIYvQb9Nyzs06DPsYvAG1F5hprq0nejB2Q3RIw2D3M+nF5baMv4Z1zp mYiJwRecFgefv78vh4YIrdpIxfEO9SLCGqP8HEwYQl8Y4Xn5MH7ydeUXaj4PD5AUkxKv HspJpEdbb9ZMNbcI1coi/uCTmOX1nHE1Pvatlu6ek/HIxSScyufGX99tdAqbzpXXloSi RUDFX5XGbNmIG5QNmonOjI5Eu7NWdskQdiu/ki0LbsGStemQaSjj1soh3AM/r8KyDHzO ijyg== X-Gm-Message-State: AOAM532VqKUOC7MxLw+aDY1Tf2LaHqvuPNvC8B9TPQ/dpyXtOauOtAC5 uaQUmkWebz1JjrdTkJcJzUJFBKbqfTpjQA== X-Received: by 2002:a17:90a:ce8b:: with SMTP id g11mr11728706pju.170.1624044603556; Fri, 18 Jun 2021 12:30:03 -0700 (PDT) Received: from localhost.localdomain ([71.212.149.176]) by smtp.gmail.com with ESMTPSA id 92sm11938234pjv.29.2021.06.18.12.30.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Jun 2021 12:30:03 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 19/23] linux-user/s390x: Implement setup_sigtramp Date: Fri, 18 Jun 2021 12:29:47 -0700 Message-Id: <20210618192951.125651-20-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210618192951.125651-1-richard.henderson@linaro.org> References: <20210618192951.125651-1-richard.henderson@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::632; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x632.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_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+patch=linaro.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(-) -- 2.25.1 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 ef136dae33..372861d6d8 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; @@ -200,9 +198,7 @@ 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 */ @@ -253,9 +249,7 @@ 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. */ @@ -377,3 +371,17 @@ 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); +}