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[97.113.13.231]) by smtp.gmail.com with ESMTPSA id e14sm18166264pff.60.2019.05.19.13.20.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 19 May 2019 13:20:06 -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; bh=EslukgOgrXKOg9aqYU0CsDWXr7O+egog9zUh9mSRURk=; b=spOuULvmqJdWnGZ+oymBAv8/exyZU1Oz1CqCtk0l1Cjv6ARICQX/FmE+lISMPzTh3T GdWzVEKu1aXWInJrjsUqCrYoVAsCDUWn1w8zcjlexDk64VYnAmpUzMWd7PplXPbAYzi8 EX+CjtHpjMlj36tsdNrtMQcUwn3T1HIT09g6cG0SqabZdyZ75qRBbC2ZolhkSLcniiyP jpALldhlfXNOc8yFWpFka4vwYRlo5LZcmVSnScAYOCXZz5QL/EAl370pUg4eHFfq4+Re qpVfr8NMFKvY77B4Dieib+Tx0Alk68+Lk53+KV50PBHaP9BjlMpS/fsb3Zihi+Jb/Sq6 ZaYw== 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; bh=EslukgOgrXKOg9aqYU0CsDWXr7O+egog9zUh9mSRURk=; b=GTAxNTmnSZwgWRrOEZNy+HmrHLTj202N2ZFVUEe2Dv+8j0fi8KHIupGgGV74NJPwBr fsaM7sQTJmt+7nXCr7dUT2pLwtw3rBqlbNvEfkJgutSC08/U/tv2OZoKKnOGkb5LHEM2 7jmUvBG3tImqrZUrwzYeTklDtRl6I1hiQ4OBz8SX1rT4A7PKnrjK20z95MMKLv+c5eN/ xJNbn/EBfC99NTSoIRCRzoQkAlGKfgWmoslrx0uABS9uAKUrQ7DKaag7CG34vWlxM93q /MPc6VvvOpVOwa1Cadaal9Iiq1HyqThzEVJvVRYy5dZuTHahaT9OEEH3DgMIk78uc79V CKAw== X-Gm-Message-State: APjAAAVu+Sjla2CSQz1+JCOfj0ZSoGtUA/CdA4ftixD6KybCr6zrU4ue /aKUEvwbGwSmmXya8MUENtnAWPhqGp0= X-Google-Smtp-Source: APXvYqxTN5bWSUnvvpcTnivRh7ZWJWJ4vbwtJIVtvJ8Vg1ruiplEbRnWE5msBXSSzQZp4fcnNulEBw== X-Received: by 2002:a17:902:8609:: with SMTP id f9mr15303251plo.252.1558297207346; Sun, 19 May 2019 13:20:07 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Sun, 19 May 2019 13:19:49 -0700 Message-Id: <20190519201953.20161-10-richard.henderson@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190519201953.20161-1-richard.henderson@linaro.org> References: <20190519201953.20161-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::644 Subject: [Qemu-devel] [PATCH 09/13] linux-user/sparc: Flush register windows before clone/fork/vfork X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: laurent@vivier.eu Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" As seen as the very first instruction of sys_clone in the kernel. Ideally this would be done in or before cpu_copy, and not with a separate explicit test vs the syscall number, but this is a more minimal solution. Signed-off-by: Richard Henderson --- linux-user/sparc/cpu_loop.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c index 9e357229c0..0816da6fa1 100644 --- a/linux-user/sparc/cpu_loop.c +++ b/linux-user/sparc/cpu_loop.c @@ -169,6 +169,18 @@ void cpu_loop (CPUSPARCState *env) case 0x110: case 0x16d: #endif + /* + * Before copying/adjusting registers for parent/child, + * flush the register windows to the stack. + */ + switch (env->gregs[1]) { + case TARGET_NR_fork: + case TARGET_NR_vfork: + case TARGET_NR_clone: + flush_windows(env); + break; + } + ret =3D do_syscall (env, env->gregs[1], env->regwptr[0], env->regwptr[1], env->regwptr[2], env->regwptr[3], --=20 2.17.1