From nobody Fri May 10 02:44:54 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1620997445; cv=none; d=zohomail.com; s=zohoarc; b=hf+CtLE7DxbsFtv7ImZbvSP9wN8y/grdqw4O4dkt2ZhLdELGIN7mkh5vmI0cbbXsdI9a0URD0UStPJ/kG4R5ZpLJ841lE5LCa/zgL/1rlO9O2DsOwxglHmQJyMzCZEXGeS3ldnFqg//ar61w5DPbaeiYdXO1FOK46Spttj4jIzE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1620997445; h=Content-Transfer-Encoding:Cc:Date:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:To; bh=hOLFbf5Pawk7atX6ndMeKK0W5ppH/WMLBHbb0tC1NMQ=; b=VjXkYjf8/fqUsbO+AFWxHThhPejjabs2j8xiP1XWhrRDfCZ+l4BFm3VJMz67rrY5/q0QThCi+dYhvutheA3ho3wFBkwJ8cngEfqK7ejddzonmJn8Q63DDmGLJ6LpGI+6ffFxVjtTHEhZ+SulHUqUBlfvrWkh/YB2VSpy5QrzBpw= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1620997445413204.20842362172868; Fri, 14 May 2021 06:04:05 -0700 (PDT) Received: from localhost ([::1]:45806 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lhXU2-0005YF-L2 for importer@patchew.org; Fri, 14 May 2021 09:04:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35164) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lhTSp-0003pO-NC for qemu-devel@nongnu.org; Fri, 14 May 2021 04:46:34 -0400 Received: from [114.242.206.180] (port=38744 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 1lhTSo-0004Sq-3w for qemu-devel@nongnu.org; Fri, 14 May 2021 04:46:31 -0400 Received: by lawrence-XPS-15-9560.loongson.cn (Postfix, from userid 1000) id 94ADD124F8A; Fri, 14 May 2021 16:46:22 +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 16:46:19 +0800 Message-Id: <20210514084619.129020-1-sendtozouxu@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 114.242.206.180 (failed) 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: 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 09:01:36 -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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" 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 =3D env_cpu(env); int trapnr; + int si_code; + uint8_t status; abi_ulong pc; abi_ulong ret; =20 @@ -315,6 +317,28 @@ void cpu_loop(CPUX86State *env) case EXCP_ATOMIC: cpu_exec_step_atomic(cs); break; + case EXCP10_COPR: + si_code =3D 0; + status =3D env->fp_status.float_exception_flags; + if (status & float_flag_invalid) { + si_code =3D TARGET_FPE_FLTINV; + } + if (status & float_flag_divbyzero) { + si_code =3D TARGET_FPE_FLTDIV; + } + if (status & float_flag_overflow) { + si_code =3D TARGET_FPE_FLTOVF; + } + if ((status & float_flag_underflow) || + (status & float_flag_input_denormal) || + (status & float_flag_output_denormal)) { + si_code =3D TARGET_FPE_FLTUND; + } + if (status & float_flag_inexact) { + si_code =3D TARGET_FPE_FLTRES; + } + gen_signal(env, TARGET_SIGFPE, si_code, env->eip); + break; default: pc =3D 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) =20 void target_cpu_copy_regs(CPUArchState *env, struct target_pt_regs *regs) { - env->cr[0] =3D CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; + env->cr[0] =3D CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK | CR0_NE_MASK; env->hflags |=3D HF_PE_MASK | HF_CPL_MASK; if (env->features[FEAT_1_EDX] & CPUID_SSE) { env->cr[4] |=3D CR4_OSFXSR_MASK; --=20 2.25.1