From patchwork Fri May 14 07:56:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xu Zou X-Patchwork-Id: 12257777 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=-13.8 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 1EF47C433B4 for ; Fri, 14 May 2021 13:07:42 +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 C9B086135A for ; Fri, 14 May 2021 13:07:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C9B086135A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:53576 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lhXXZ-0002Vn-0g for qemu-devel@archiver.kernel.org; Fri, 14 May 2021 09:07:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56062) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhSpd-0002IY-NU for qemu-devel@nongnu.org; Fri, 14 May 2021 04:06:01 -0400 Received: from [114.242.206.180] (port=33226 helo=lawrence-XPS-15-9560.loongson.cn) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhSpb-0004P7-R7 for qemu-devel@nongnu.org; Fri, 14 May 2021 04:06:01 -0400 Received: by lawrence-XPS-15-9560.loongson.cn (Postfix, from userid 1000) id CEA1D120FFE; Fri, 14 May 2021 15:56:58 +0800 (CST) From: Xu Zou To: qemu-devel@nongnu.org Subject: [PATCH] linux-user: Handle EXCP10_COPR properly for i386 Date: Fri, 14 May 2021 15:56:40 +0800 Message-Id: <20210514075640.110544-1-sendtozouxu@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Host-Lookup-Failed: Reverse DNS lookup failed for 114.242.206.180 (failed) Received-SPF: none client-ip=114.242.206.180; envelope-from=lawrence@lawrence-XPS-15-9560.loongson.cn; helo=lawrence-XPS-15-9560.loongson.cn X-Spam_score_int: 36 X-Spam_score: 3.6 X-Spam_bar: +++ X-Spam_report: (3.6 / 5.0 requ) BAYES_00=-1.9, DKIM_ADSP_CUSTOM_MED=0.001, FORGED_GMAIL_RCVD=1, FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.248, NML_ADSP_CUSTOM_MED=0.9, NO_DNS_FOR_FROM=0.001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001, SPOOFED_FREEMAIL=0.825, SPOOFED_FREEMAIL_NO_RDNS=0.001, SPOOF_GMAIL_MID=1.498 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 14 May 2021 09:01:35 -0400 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: laurent@vivier.eu, Xu Zou Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Handle EXCP10_COPR properly for i386 in cpu loop. NE flag is set to select native mode for handling floating-point exceptions. FWAIT instruction can raise EXCP10_COPR exception by using fpu_raise_exception() function. The code is based on kernel's function fpu__exception_code() in arch/x86/kernel/fpu/core.c. Signed-off-by: Xu Zou --- linux-user/i386/cpu_loop.c | 26 +++++++++++++++++++++++++- 1 file changed, 25 insertions(+), 1 deletion(-) diff --git a/linux-user/i386/cpu_loop.c b/linux-user/i386/cpu_loop.c index f813e87294..e1f2911554 100644 --- a/linux-user/i386/cpu_loop.c +++ b/linux-user/i386/cpu_loop.c @@ -199,6 +199,8 @@ void cpu_loop(CPUX86State *env) { CPUState *cs = env_cpu(env); int trapnr; + int si_code; + uint8_t status; abi_ulong pc; abi_ulong ret; @@ -315,6 +317,28 @@ void cpu_loop(CPUX86State *env) case EXCP_ATOMIC: cpu_exec_step_atomic(cs); break; + case EXCP10_COPR: + si_code = 0; + status = env->fp_status.float_exception_flags; + if (status & float_flag_invalid) { + si_code = TARGET_FPE_FLTINV; + } + if (status & float_flag_divbyzero) { + si_code = TARGET_FPE_FLTDIV; + } + if (status & float_flag_overflow) { + si_code = TARGET_FPE_FLTOVF; + } + if ((status & float_flag_underflow) || + (status & float_flag_input_denormal) || + (status & float_flag_output_denormal)) { + si_code = TARGET_FPE_FLTUND; + } + if (status & float_flag_inexact) { + si_code = TARGET_FPE_FLTRES; + } + gen_signal(env, TARGET_SIGFPE, si_code, env->eip); + break; default: pc = env->segs[R_CS].base + env->eip; EXCP_DUMP(env, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", @@ -327,7 +351,7 @@ void cpu_loop(CPUX86State *env) void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) { - env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; + env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK | CR0_NE_MASK; env->hflags |= HF_PE_MASK | HF_CPL_MASK; if (env->features[FEAT_1_EDX] & CPUID_SSE) { env->cr[4] |= CR4_OSFXSR_MASK;