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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id j10sm823663wmi.18.2020.04.20.14.22.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Apr 2020 14:22:11 -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=KOErd88B3Ihy9IyTZFkOsxrNfUtKAovKUtVCpnPaODQ=; b=EM+ilBcBpdhJU/TQU193eMLKfo1Rs2Cgxf352fuHGupkA8tuLIFqHGtk/OAvzllU++ xU05slbQE0dtdboUg1PtvGIRxNQJ6yNDlDzOC0BTMUurrrisSruqkkNXHoCU8FRnKydI Lpv2FbFF75Oa0uGvgrUQPH4DhOrCaIoyeJ6TuXLf7k0axW6CPTDRDk3tkxBNFqZ1+5ad T71wl65Ct5W6UxpWxTEw/bRwvt9+cK65nbvqnZrO3hG5C4S3wU3tjKSUVQHHRaECSjZI TSwPbFSFchhB2ZXvhTeE+VY91SntvGXnChF9ki03VS//zHxMFc0rYrQ5r4gt/XDnE4Cq cLkA== 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=KOErd88B3Ihy9IyTZFkOsxrNfUtKAovKUtVCpnPaODQ=; b=stDEAhT1qid+esn04Ot+AG6n3swRKoSFBzQaUU6FuDO3WrJnP+d1goEcBaHOMJV+rG W81z4vPvt5OUMvPpd0OPBmhF5tBoP58//YkYgYlbqQeYMqn47TY1f09E1M0PkFldC6GK ouahxt9E9TEtpupM9xC+sPTrzJneLpsRgVF/hWIZXGtzgZFsVlTGcOoUzO3GmlQ3DJWi QXomN5E3sxmitVu1kBeA/vkCsvCLhz8OKbX8Lm76+ljEE8WL9dOR/qLbxAC42wn995IH 7fZGBF0lNpEuhAnpwqKIvng62gh7ZEllg0gF8YVEn7DcHpk2dsh6FF9n2frqVH2aZZbO FlzQ== X-Gm-Message-State: AGi0Pua9ek6KbeqKXSzT1j9GloTRLCrfNQ9ksSGShLpiGj8rH9Y/unTq UlE6rJghsWN+dyhhTmYcObqovaW0tOjwbA== X-Google-Smtp-Source: APiQypJs9AcGKA03+QZPmqsYPCwgmRuBjZ/mjimpWwpv3YZhECRbn/IFOumsjwn7MGNIrScd3Zsp3g== X-Received: by 2002:a5d:6091:: with SMTP id w17mr20032471wrt.382.1587417731746; Mon, 20 Apr 2020 14:22:11 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH 2/4] linux-user/arm: Remove bogus SVC 0xf0002 handling Date: Mon, 20 Apr 2020 22:22:04 +0100 Message-Id: <20200420212206.12776-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200420212206.12776-1-peter.maydell@linaro.org> References: <20200420212206.12776-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::443; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x443.google.com X-detected-operating-system: by eggs.gnu.org: Error: [-] PROGRAM ABORT : Malformed IPv6 address (bad octet value). Location : parse_addr6(), p0f-client.c:67 X-Received-From: 2a00:1450:4864:20::443 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: omerg681@gmail.com, Riku Voipio , Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" We incorrectly treat SVC 0xf0002 as a cacheflush request (which is a NOP for QEMU). This is the wrong syscall number, because in the svc-immediate OABI syscall numbers are all offset by the ARM_SYSCALL_BASE value and so the correct insn is SVC 0x9f0002. (This is handled further down in the code with the other Arm-specific syscalls like NR_breakpoint.) When this code was initially added in commit 6f1f31c069b20611 in 2004, ARM_NR_cacheflush was defined as (ARM_SYSCALL_BASE + 0xf0000 + 2) so the value in the comparison took account of the extra 0x900000 offset. In commit fbb4a2e371f2fa7 in 2008, the ARM_SYSCALL_BASE was removed from the definition of ARM_NR_cacheflush and handling for this group of syscalls was added below the point where we subtract ARM_SYSCALL_BASE from the SVC immediate value. However that commit forgot to remove the now-obsolete earlier handling code. Remove the spurious ARM_NR_cacheflush condition. Signed-off-by: Peter Maydell Reviewed-by: Edgar E. Iglesias Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- linux-user/arm/cpu_loop.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c index 82d0dd3c312..025887d6b86 100644 --- a/linux-user/arm/cpu_loop.c +++ b/linux-user/arm/cpu_loop.c @@ -308,9 +308,7 @@ void cpu_loop(CPUARMState *env) n =3D insn & 0xffffff; } =20 - if (n =3D=3D ARM_NR_cacheflush) { - /* nop */ - } else if (n =3D=3D 0 || n >=3D ARM_SYSCALL_BASE || env->t= humb) { + if (n =3D=3D 0 || n >=3D ARM_SYSCALL_BASE || env->thumb) { /* linux syscall */ if (env->thumb || n =3D=3D 0) { n =3D env->regs[7]; --=20 2.20.1