From nobody Tue Dec 23 10:46:25 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1628860827; cv=none; d=zohomail.com; s=zohoarc; b=aRmI5O8lA1MJx+Cf0CfoFw3oqEIbICM18+6WiF8MTp+lEflAzwUHehKjKbCGki2lujoEtzlMP4pdt9uqvsUwwyLCwR18Gax8meMzkdkcQLbLgYefpVLjJeqAB66JKFUm/3ygfePCd9hq368LhxypaxdESllyBOWWy45N6zz3ZeU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1628860827; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=fJIpsv1H5kq5YSGMr5mAwnnyIFFq6TrksBVoWM/ILDs=; b=LAoGU+WNhq8R8YE2pDbbu6gsluimtt+xnIMDx6QQSF+kidHTHqoHPpvRNCZ4QcmjAi02qFIz6K0nCvwLLcBCd4OZNy3QIbVnWA4rzVoYY+hGGN/VtNiWBdsnGJQpm9wVeCk2W/11AHnjvbbYnkFDSWj9kHjYdefEgt9H3l4jzC4= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1628860827625712.2592867297669; Fri, 13 Aug 2021 06:20:27 -0700 (PDT) Received: from localhost ([::1]:59898 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mEX6o-0000TZ-Ki for importer@patchew.org; Fri, 13 Aug 2021 09:20:26 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46950) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mEX4m-00061h-6y for qemu-devel@nongnu.org; Fri, 13 Aug 2021 09:18:20 -0400 Received: from mail-wm1-x32c.google.com ([2a00:1450:4864:20::32c]:56318) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mEX4j-0001BH-MV for qemu-devel@nongnu.org; Fri, 13 Aug 2021 09:18:19 -0400 Received: by mail-wm1-x32c.google.com with SMTP id 6so6880892wme.5 for ; Fri, 13 Aug 2021 06:18:17 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [81.2.115.148]) by smtp.gmail.com with ESMTPSA id q75sm1585705wme.40.2021.08.13.06.18.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Aug 2021 06:18:16 -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=fJIpsv1H5kq5YSGMr5mAwnnyIFFq6TrksBVoWM/ILDs=; b=eCR11VKxyvxY/s1Xko6dkF1JxhyzTULV3anFfycSnEX6mGtPr/tFCz2Wv9GRutP4cK FlP1u2jv+Pi+Omogx2TgVfOPA5tDgw/wpzZEgW08Oj5Fy8EWxzLdyrpgh24kNAuI9Nfg 37ue0u5jMNvvTmvQ8dQxyRvWUX84yjn+5KpGFNQMiYLXmQ/5Ou58Bzc1YJYbPVNRnAbI 4HE1Utx8fI/n8fB9LzBOnVwlfyG36RaRga2jb3CLYeYmCrLqSJDqmClJJRXwLjnb44eU 1LLZF9HlrLTN92eTnFGHh84oKpfhSke0vPM1hmnT4XRxj9e3ZuEYsVrNFve9jXdKnU2o WvZw== 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=fJIpsv1H5kq5YSGMr5mAwnnyIFFq6TrksBVoWM/ILDs=; b=YRQVFknYsaHPGO8dDH9crxzaKfJIgrSn1vDnpiPw3eqeKMivivvMBSLrcoh7uTtm2C zYDu/dcVwH3FZU9aJWsua/NgMX3eJkshX83cE1ChxLDqXGfobo1aN7YnYSmXz1KRsNiE h6wLS3C0rzCod0wIf/Ii9WVpoOdwcImz6BouZF7tArps4ZnkO+mM6S+mxmOmIM4BmNDS 027DJHM20Yh30eWbpnjmqc+1G+CFf/SY5wEoJfYp3FV6v0t9QTvEsagMu+2a13b9JjEh EBf0PFtH3KQhdpDGHLH9xcWW9cqJHi63pnHUMqdgcCc0PB/Y4o9TN+s/jIMFyJ91+pY+ yGPA== X-Gm-Message-State: AOAM530ftmqCrAbuciXS0qdTrVgBGvuP6VP0q5PiaHMaNQm1dTySbVIx KWVGN4m/HqvHLzfmAbiLtf/yIg== X-Google-Smtp-Source: ABdhPJwrWwVMbShO6Kj9waS5iM74iY/68w0HA6Or7hCFlLExBdBaLeN86Dp2WhMArwxN91XYX9346w== X-Received: by 2002:a1c:6a07:: with SMTP id f7mr2575581wmc.15.1628860696444; Fri, 13 Aug 2021 06:18:16 -0700 (PDT) From: Peter Maydell To: qemu-arm@nongnu.org, qemu-devel@nongnu.org Subject: [PATCH for-6.2 6/7] linux-user/arm: Use force_sig_fault() Date: Fri, 13 Aug 2021 14:18:08 +0100 Message-Id: <20210813131809.28655-7-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210813131809.28655-1-peter.maydell@linaro.org> References: <20210813131809.28655-1-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::32c; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32c.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=unavailable 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: Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1628860828480100001 Content-Type: text/plain; charset="utf-8" Use the new force_sig_fault() function instead of setting up a target_siginfo_t and calling queue_signal(). Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson --- I threw in a comment confirming that the si_addr value for the "bad SWI immediate" SIGILL really is different from the PC value reported in the ucontext_t and resumed from if the handler returns, because it looked like a bug to me when I was reading the code... --- linux-user/arm/cpu_loop.c | 54 ++++++++++++--------------------------- 1 file changed, 16 insertions(+), 38 deletions(-) diff --git a/linux-user/arm/cpu_loop.c b/linux-user/arm/cpu_loop.c index 44324976196..d4b4f0c71fc 100644 --- a/linux-user/arm/cpu_loop.c +++ b/linux-user/arm/cpu_loop.c @@ -22,6 +22,7 @@ #include "qemu.h" #include "elf.h" #include "cpu_loop-common.h" +#include "signal-common.h" #include "semihosting/common-semi.h" =20 #define get_user_code_u32(x, gaddr, env) \ @@ -92,7 +93,6 @@ static void arm_kernel_cmpxchg64_helper(CPUARMState *env) { uint64_t oldval, newval, val; uint32_t addr, cpsr; - target_siginfo_t info; =20 /* Based on the 32 bit code in do_kernel_trap */ =20 @@ -141,12 +141,9 @@ segv: end_exclusive(); /* We get the PC of the entry address - which is as good as anything, on a real kernel what you get depends on which mode it uses. */ - info.si_signo =3D TARGET_SIGSEGV; - info.si_errno =3D 0; /* XXX: check env->error_code */ - info.si_code =3D TARGET_SEGV_MAPERR; - info._sifields._sigfault._addr =3D env->exception.vaddress; - queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); + force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, + env->exception.vaddress); } =20 /* Handle a jump to the kernel code page. */ @@ -284,8 +281,6 @@ void cpu_loop(CPUARMState *env) CPUState *cs =3D env_cpu(env); int trapnr; unsigned int n, insn; - target_siginfo_t info; - uint32_t addr; abi_ulong ret; =20 for(;;) { @@ -320,11 +315,8 @@ void cpu_loop(CPUARMState *env) break; } =20 - info.si_signo =3D TARGET_SIGILL; - info.si_errno =3D 0; - info.si_code =3D TARGET_ILL_ILLOPN; - info._sifields._sigfault._addr =3D env->regs[15]; - queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); + force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLOPN, + env->regs[15]); } break; case EXCP_SWI: @@ -392,18 +384,14 @@ void cpu_loop(CPUARMState *env) * Otherwise SIGILL. This includes any SWI with * immediate not originally 0x9fxxxx, because * of the earlier XOR. + * Like the real kernel, we report the addr of= the + * SWI in the siginfo si_addr but leave the PC + * pointing at the insn after the SWI. */ - info.si_signo =3D TARGET_SIGILL; - info.si_errno =3D 0; - info.si_code =3D TARGET_ILL_ILLTRP; - info._sifields._sigfault._addr =3D env->regs[1= 5]; - if (env->thumb) { - info._sifields._sigfault._addr -=3D 2; - } else { - info._sifields._sigfault._addr -=3D 4; - } - queue_signal(env, info.si_signo, - QEMU_SI_FAULT, &info); + abi_ulong faultaddr =3D env->regs[15]; + faultaddr -=3D env->thumb ? 2 : 4; + force_sig_fault(TARGET_SIGILL, TARGET_ILL_ILLT= RP, + faultaddr); } break; } @@ -434,24 +422,14 @@ void cpu_loop(CPUARMState *env) break; case EXCP_PREFETCH_ABORT: case EXCP_DATA_ABORT: - addr =3D env->exception.vaddress; - { - info.si_signo =3D TARGET_SIGSEGV; - info.si_errno =3D 0; - /* XXX: check env->error_code */ - info.si_code =3D TARGET_SEGV_MAPERR; - info._sifields._sigfault._addr =3D addr; - queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); - } + /* XXX: check env->error_code */ + force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR, + env->exception.vaddress); break; case EXCP_DEBUG: case EXCP_BKPT: excp_debug: - info.si_signo =3D TARGET_SIGTRAP; - info.si_errno =3D 0; - info.si_code =3D TARGET_TRAP_BRKPT; - info._sifields._sigfault._addr =3D env->regs[15]; - queue_signal(env, info.si_signo, QEMU_SI_FAULT, &info); + force_sig_fault(TARGET_SIGTRAP, TARGET_TRAP_BRKPT, env->regs[1= 5]); break; case EXCP_KERNEL_TRAP: if (do_kernel_trap(env)) --=20 2.20.1