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[209.51.188.17]) by mx.google.com with ESMTPS id c5-20020ac85a85000000b003b68f57fb3esi1644930qtc.703.2023.02.16.05.49.47 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 16 Feb 2023 05:49:47 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=oXENBCjN; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pSedT-0001XC-8h; Thu, 16 Feb 2023 08:49:19 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSedR-0001TY-UJ for qemu-devel@nongnu.org; Thu, 16 Feb 2023 08:49:17 -0500 Received: from mail-wm1-x32a.google.com ([2a00:1450:4864:20::32a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pSedQ-0001aA-Br for qemu-devel@nongnu.org; Thu, 16 Feb 2023 08:49:17 -0500 Received: by mail-wm1-x32a.google.com with SMTP id f23-20020a05600c491700b003dff4480a17so4073129wmp.1 for ; Thu, 16 Feb 2023 05:49:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=B2dYUbNSjmgpVDD1OmNWATFHbh0VLr0h9CMNVrcVRPQ=; b=oXENBCjN1ukbeODkUqkkj2do0qY8rWYSpJkU89n9qxsiiLWRqlLvfRQX0XRUYhxLAq 8t9Cuj7KOwgLNt4a0uSocNG8dGufiIwYRxt9LDibhr6p5gcnynJN3abhNP2Q0sV20MHc PAZcbI5xsL7z5WzEGCwQckZ6vP0aq+A6txwwatRsUxlAsNXlh5N6he5E67sXYnV6bix1 /j4zhM2wYUe0XmWb06b6MYecO8vefxNdOXDbqGzZhXe7nTZx/5ggewdBMHStndgxpDld WcCAB/yeZZZ0PbOUDMSzr0xkTyHhqSscHT0vyLS+GW68rGBSDmUZWi+7/RywdVVwqIcW NWNQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=B2dYUbNSjmgpVDD1OmNWATFHbh0VLr0h9CMNVrcVRPQ=; b=oQfPDa4uCnavfBkcPU1YM3zpBkOPxTHP7v93d4g61O3B2P4LJlECkMPux0FG3nYlYu B5Wnw9y6F8y81kmSs6c6fh46edaH5bxePQ8Umbo2s/e0FI6OGpml5zmozb/VdXmbxhKN JrpX3jUsP6AaavEDWiM+ldQlsZ4ZP3JESDZ1nqGFwVjrlRlNEQkKnjtBZT/wWCkWidLT E/L7dRxh07edV7dlrZ6GPknsoqOVXBPATK7/9cau5+TIeDBqz637ig1255/9YtbuFxi4 XhFitbX2AIWmcWUa0/cF7DAJ1U+lkNMGBGcEp6gHqm2lM+DGKJb0x4Z1hcozLzlpOs+I Xzaw== X-Gm-Message-State: AO0yUKXaSubBoMiOLqSasA0goVqnWoQkCC0ESJnRp3cTDg2sdGl9onbA AFkeyvvbvtlKyURwHRZsj7uGIAYk9BXHUQlz9xM= X-Received: by 2002:a05:600c:1987:b0:3dc:52fc:7f06 with SMTP id t7-20020a05600c198700b003dc52fc7f06mr4864869wmq.41.1676555354461; Thu, 16 Feb 2023 05:49:14 -0800 (PST) Received: from volterra.localdomain ([2a01:e0a:5cc:caa0:c49d:d14a:e6ed:555a]) by smtp.gmail.com with ESMTPSA id y11-20020a05600c364b00b003dc0cb5e3f1sm1557933wmq.46.2023.02.16.05.49.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Feb 2023 05:49:14 -0800 (PST) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: sw@weilnetz.de, kkostiuk@redhat.com, clg@kaod.org, richard.henderson@linaro.org, alex.bennee@linaro.org, peter.maydell@linaro.org, Pierrick Bouvier Subject: [PATCH v2 1/4] util/cacheflush: fix cache on windows-arm64 Date: Thu, 16 Feb 2023 14:49:08 +0100 Message-Id: <20230216134911.6803-2-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230216134911.6803-1-pierrick.bouvier@linaro.org> References: <20230216134911.6803-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wm1-x32a.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=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org ctr_el0 access is privileged on this platform and fails as an illegal instruction. Windows does not offer a way to flush data cache from userspace, and only FlushInstructionCache is available in Windows API. The generic implementation of flush_idcache_range uses, __builtin___clear_cache, which already use the FlushInstructionCache function. So we rely on that. Signed-off-by: Pierrick Bouvier Reviewed-by: Richard Henderson --- util/cacheflush.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/util/cacheflush.c b/util/cacheflush.c index 2c2c73e085..0a0acd70fa 100644 --- a/util/cacheflush.c +++ b/util/cacheflush.c @@ -121,8 +121,10 @@ static void sys_cache_info(int *isize, int *dsize) static bool have_coherent_icache; #endif -#if defined(__aarch64__) && !defined(CONFIG_DARWIN) -/* Apple does not expose CTR_EL0, so we must use system interfaces. */ +#if defined(__aarch64__) && !defined(CONFIG_DARWIN) && !defined(CONFIG_WIN32) +/* Apple does not expose CTR_EL0, so we must use system interfaces. + * Windows neither, but we use a generic implementation of flush_idcache_range + * in this case. */ static uint64_t save_ctr_el0; static void arch_cache_info(int *isize, int *dsize) { @@ -225,7 +227,9 @@ static void __attribute__((constructor)) init_cache_info(void) /* Caches are coherent and do not require flushing; symbol inline. */ -#elif defined(__aarch64__) +#elif defined(__aarch64__) && !defined(CONFIG_WIN32) +/* For Windows, we use generic implementation of flush_idcache_range, that + * performs a call to FlushInstructionCache, through __builtin___clear_cache */ #ifdef CONFIG_DARWIN /* Apple does not expose CTR_EL0, so we must use system interfaces. */ From patchwork Thu Feb 16 13:49:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 654035 Delivered-To: patch@linaro.org Received: by 2002:adf:f90f:0:0:0:0:0 with SMTP id b15csp360639wrr; Thu, 16 Feb 2023 05:49:59 -0800 (PST) X-Google-Smtp-Source: AK7set81q5vVVjnlc/j9lGXqgO6hrE3sOZuDlkH8lKxmaw0Wj/haIinPlUKs58BdyzZ42PvrHynz X-Received: by 2002:a05:6214:226b:b0:56e:bdd8:75d0 with SMTP id gs11-20020a056214226b00b0056ebdd875d0mr12051135qvb.15.1676555399188; Thu, 16 Feb 2023 05:49:59 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676555399; cv=none; d=google.com; s=arc-20160816; b=YyF9xNHQuEB1Mk7qiO/BQhNoU6WsSDd1Z/wvT7VvFAJvR+ufYuM9fHdYYjp2NwY6QX knYNzFVMh3pgH5ZvdvTi+708nQYAYGIGBZ9x9YNbU+5f1MZf2DThitOVp5PDffepQJW7 boZYxDvOHKjOen/PAQTf2xhjXEO50PIeeQwVfNKSnCxdg7oZs/BZYecewki2hwyORetY GZYqruPtl/GPYvMZSYgVOKb4lK8VCVt7fLr7irmb3xdfvSy8FVFETYu7fhmxOsh7GKfC gFBsY2YG+e0pZ8Hc5kMyzJvBqY8fVIT48sFoZ6EdyisZ4+bUjUAchYDYqk0MdG9mC8PZ CtgA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=OmRSGsOLRR4SdMYF46j6nl7BWaAZNtQ19hvx9YK2z9A=; b=UEGMG/OSjc4j/r8AMn+SuxsLJ8K9K7QLE4Q5CYiuZb+PXKV52CrfmAlmJcruTp4lZX JczqPst8nKAodlv8KnT1YQa03NwtOQzQJX/l9N0VF9jXstKKxU05DEqBqxea49XeVHIX agOoiRlulIKUGRE8RvxPHDq9lNwCvgzv1CXFRBGiBnD1BKM9STqBK8H/NZu7DsI4t3hd 4XYbY6kiW636aSbswKbuTMM/mFW4b9ob+m/hdsmo64rnMR+F6A/69erFxx5z3aXT1HnN DsL8bdykK1gp6nNUsgq1G2EqsBPtchh5zynEc9k9MSPpDXgYs3SakTbIMwixPm91HkUN YSUA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=EHuUmuwe; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. 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Alas, on arm64, it seems to *always* perform stack unwinding, which crashes from generated code. By using alternative implementation built in mingw, we avoid doing stack unwinding and this fixes crash when calling longjmp. Signed-off-by: Pierrick Bouvier Acked-by: Richard Henderson --- include/sysemu/os-win32.h | 21 +++++++++++++++++++-- meson.build | 22 ++++++++++++++++++++++ 2 files changed, 41 insertions(+), 2 deletions(-) diff --git a/include/sysemu/os-win32.h b/include/sysemu/os-win32.h index 5b38c7bd04..634931a387 100644 --- a/include/sysemu/os-win32.h +++ b/include/sysemu/os-win32.h @@ -51,14 +51,31 @@ typedef struct sockaddr_un { extern "C" { #endif -#if defined(_WIN64) +#if defined(__aarch64__) +#ifndef CONFIG_MINGW64_HAS_SETJMP_LONGJMP +#error mingw must provide setjmp/longjmp for windows-arm64 +#endif +/* On windows-arm64, setjmp is available in only one variant, and longjmp always + * does stack unwinding. This crash with generated code. + * Thus, we use another implementation of setjmp (not windows one), coming from + * mingw, which never performs stack unwinding. */ +#undef setjmp +#undef longjmp +/* These functions are not declared in setjmp.h because __aarch64__ defines + * setjmp to _setjmpex instead. However, they are still defined in libmingwex.a, + * which gets linked automatically. */ +extern int __mingw_setjmp(jmp_buf); +extern void __attribute__((noreturn)) __mingw_longjmp(jmp_buf, int); +#define setjmp(env) __mingw_setjmp(env) +#define longjmp(env, val) __mingw_longjmp(env, val) +#elif defined(_WIN64) /* On w64, setjmp is implemented by _setjmp which needs a second parameter. * If this parameter is NULL, longjump does no stack unwinding. * That is what we need for QEMU. Passing the value of register rsp (default) * lets longjmp try a stack unwinding which will crash with generated code. */ # undef setjmp # define setjmp(env) _setjmp(env, NULL) -#endif +#endif /* __aarch64__ */ /* QEMU uses sigsetjmp()/siglongjmp() as the portable way to specify * "longjmp and don't touch the signal masks". Since we know that the * savemask parameter will always be zero we can safely define these diff --git a/meson.build b/meson.build index 4ba3bf3431..7f55205437 100644 --- a/meson.build +++ b/meson.build @@ -2450,6 +2450,28 @@ if targetos == 'windows' }''', name: '_lock_file and _unlock_file')) endif +if targetos == 'windows' + mingw_has_setjmp_longjmp = cc.links(''' + #include + int main(void) { + // these functions are not available in setjmp header, but may be + // available at link time, from libmingwex.a + extern int __mingw_setjmp(jmp_buf); + extern void __attribute__((noreturn)) __mingw_longjmp(jmp_buf, int); + jmp_buf env; + __mingw_setjmp(env); + __mingw_longjmp(env, 0); + } + ''', name: 'mingw setjmp and longjmp') + + config_host_data.set('CONFIG_MINGW64_HAS_SETJMP_LONGJMP', + mingw_has_setjmp_longjmp) + + if cpu == 'aarch64' and not mingw_has_setjmp_longjmp + error('mingw must provide setjmp/longjmp for windows-arm64') + endif +endif + ######################## # Target configuration # ######################## From patchwork Thu Feb 16 13:49:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 654032 Delivered-To: patch@linaro.org Received: by 2002:adf:f90f:0:0:0:0:0 with SMTP id b15csp360445wrr; Thu, 16 Feb 2023 05:49:35 -0800 (PST) X-Google-Smtp-Source: AK7set98cSihqaeRe0lMVbTjOl/NhlgEeCPNepvFEpDAhkWPtKhopN2bvkoaCFw/V3kuYr5cNFfR X-Received: by 2002:a05:622a:164c:b0:3bb:77d1:19ef with SMTP id y12-20020a05622a164c00b003bb77d119efmr10201944qtj.32.1676555375446; Thu, 16 Feb 2023 05:49:35 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676555375; cv=none; d=google.com; s=arc-20160816; b=laQcGKb351KXWGjlChZChw9VyXm9u8V9auHAT/yDHZ32HXxeUzrEyeYkjUUpPfSX0M OeYQyv0PZX8hbKFEabFRoWn6cEt2UC2CQPWCi1xYz838VbIu8MYVf4LCKDCqf9r1ba1r o33eOtxFhLbSbJ77HCIKc1qU8bGRVckoe8JmVFDTLqOZh3aNPWnh+rxIKSYbIU549Gvt 9YMb8hXqmKOc22I7F0GXiK5WNIyQgZQ4bYD9wlrmxvC5UprqfVUa+sSCWMNSRGepIkjC 6lz+k3FSa/hk+mwBfa9uYOx4Yd5N0Y4KXi5BO4Jc2CqHX39NqZNymtjahnnn3ca9Ejq7 gBhQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dkim-signature; bh=oCtcRsma4Lb/eGzY1J2Zycrim3J1natcTOS1qZitV64=; b=qbE55EohX3u54auc/OiKJYGT31TJRO1I49lnheQsdsOr5g54q24eTxcsrwrd0iMNKY 5j49jyIihgwKfYuX0d9rToKz7rASn7CxZKX9Ljoc4zvSuP3qc5om4grW5HDFKoGzmkBs e9tYJwh1Cb/QUoXp2yrqABH1Y4x5aYdUow3OOQj+7OOevi1VY2BmGkreFhBac1xbwU3b 9cRTu7ed6C1i0jyrlD+/HnGTxWMPPhNbd7Vuf9xQvJyL5xJX6CJlexzkBwUCBhujFYj0 d4jBj0yqUEhirQqCpQ6GHJN/+XHEIciFmFIKhz5KibrgZt2fdpRlFB3E6wFaj63gR+09 wTIA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=C1MfzGHN; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. 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Thu, 16 Feb 2023 05:49:16 -0800 (PST) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: sw@weilnetz.de, kkostiuk@redhat.com, clg@kaod.org, richard.henderson@linaro.org, alex.bennee@linaro.org, peter.maydell@linaro.org, Pierrick Bouvier Subject: [PATCH v2 3/4] qga/vss-win32: fix warning for clang++-15 Date: Thu, 16 Feb 2023 14:49:10 +0100 Message-Id: <20230216134911.6803-4-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230216134911.6803-1-pierrick.bouvier@linaro.org> References: <20230216134911.6803-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::329; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wm1-x329.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=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org Reported when compiling with clang-windows-arm64. ../qga/vss-win32/install.cpp:537:9: error: variable 'hr' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] if (!(ControlService(service, SERVICE_CONTROL_STOP, NULL))) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../qga/vss-win32/install.cpp:545:12: note: uninitialized use occurs here return hr; ^~ Signed-off-by: Pierrick Bouvier Reviewed-by: Philippe Mathieu-Daudé --- qga/vss-win32/install.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/qga/vss-win32/install.cpp b/qga/vss-win32/install.cpp index b57508fbe0..b8087e5baa 100644 --- a/qga/vss-win32/install.cpp +++ b/qga/vss-win32/install.cpp @@ -518,7 +518,7 @@ namespace _com_util /* Stop QGA VSS provider service using Winsvc API */ STDAPI StopService(void) { - HRESULT hr; + HRESULT hr = S_OK; SC_HANDLE manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS); SC_HANDLE service = NULL; From patchwork Thu Feb 16 13:49:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 654036 Delivered-To: patch@linaro.org Received: by 2002:adf:f90f:0:0:0:0:0 with SMTP id b15csp360840wrr; Thu, 16 Feb 2023 05:50:21 -0800 (PST) X-Google-Smtp-Source: AK7set+GVxJ59UqOIQCnhgATv1yoqgEyL4yQv6KzGkD8uEsywQptdUZ9DfK9vg0yeSHR2kV6/ISr X-Received: by 2002:a05:6214:27ce:b0:56e:bbd9:1c0e with SMTP id ge14-20020a05621427ce00b0056ebbd91c0emr10279878qvb.5.1676555421388; 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[209.51.188.17]) by mx.google.com with ESMTPS id q11-20020a05622a030b00b003b9a5ffad0esi1674865qtw.501.2023.02.16.05.50.21 for (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Thu, 16 Feb 2023 05:50:21 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=z8OyNv6P; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pSedX-0001n2-9P; Thu, 16 Feb 2023 08:49:23 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pSedV-0001g6-Jx for qemu-devel@nongnu.org; Thu, 16 Feb 2023 08:49:21 -0500 Received: from mail-wm1-x336.google.com ([2a00:1450:4864:20::336]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pSedU-0001an-0n for qemu-devel@nongnu.org; Thu, 16 Feb 2023 08:49:21 -0500 Received: by mail-wm1-x336.google.com with SMTP id s13-20020a05600c45cd00b003ddca7a2bcbso1691282wmo.3 for ; Thu, 16 Feb 2023 05:49:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=m1JlyKJ0JjjfiqaxHOYT0DE0uPZ4Z9yVFsyaFL5lMP4=; b=z8OyNv6PwLbA9qZHBXREfFO8nE6v+4rbm/IwW6JEBro0GMRcOUJ9xY3X3fu+NEsgDf GS+ajDqzPASWryvzDT8PEFC8R4BUKlyzj+ZXxTcxSz5YlWYlR6EELh7BtvF2vwHSK16I 1ygZCLo4zR1/JcSYwkRvpdHXvEhI8hN2dwMEPpRedgKZXE0+e0Vh6C9Raw41Der0wcNi dg+7TGMYt3WxCDHU4Vs5AhSK48d/xB7/pnShNkxWJS0h4zmd7+uRBcjFVzwHZfjk5AnE gkmowx0GUgBwKAE6lMsVglBtPU16k8oC9RQkJMgDA0dxZ2Yny9CIJDbVMKvbwv+TEwAM ZL5w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=m1JlyKJ0JjjfiqaxHOYT0DE0uPZ4Z9yVFsyaFL5lMP4=; b=ak1RHpiz/xUX8pP1AuhUR0SMSWF+Dzzr3oY6rkQplvp+fnbQXWzVUiyEKlD0zB5SuL G2CgYQljUYwJg1f0FFj9we2qwV6ujmAOpDTt4vt8ecN48nX+Yb/RtgOmj/BwC2iiqD1r wVE6l17jK1XaY0x0ucZogOwz2M/Wox13kwuKeN3zyJ2mEObvIymdRBkF/nKaJPpHOFxU pb5UwdGEV3CSyY6d6r/NuuOwCeBmj+dp20ZEp0pF9bAxm5PRZW3nE1qF7lbL+rrFMyga p7VwQ4DCDbw1WxKBsWWo56RW8eDYEo/zVM26cb8yVJfrzvzZ5dwjkURYPVSVFYQEKfA8 r8BA== X-Gm-Message-State: AO0yUKWJUOgH3t/L58smIQQZF2jgPUrYlGMIctO6irpNJeF5kg0Y/fgC IKrtg+3srk9Kt9dB86B4pti/SAFXt6/RBJteFxU= X-Received: by 2002:a05:600c:5104:b0:3dc:16d4:a99f with SMTP id o4-20020a05600c510400b003dc16d4a99fmr4988318wms.8.1676555358051; Thu, 16 Feb 2023 05:49:18 -0800 (PST) Received: from volterra.localdomain ([2a01:e0a:5cc:caa0:c49d:d14a:e6ed:555a]) by smtp.gmail.com with ESMTPSA id y11-20020a05600c364b00b003dc0cb5e3f1sm1557933wmq.46.2023.02.16.05.49.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Feb 2023 05:49:17 -0800 (PST) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: sw@weilnetz.de, kkostiuk@redhat.com, clg@kaod.org, richard.henderson@linaro.org, alex.bennee@linaro.org, peter.maydell@linaro.org, Pierrick Bouvier Subject: [PATCH v2 4/4] target/ppc: fix warning with clang-15 Date: Thu, 16 Feb 2023 14:49:11 +0100 Message-Id: <20230216134911.6803-5-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230216134911.6803-1-pierrick.bouvier@linaro.org> References: <20230216134911.6803-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::336; envelope-from=pierrick.bouvier@linaro.org; helo=mail-wm1-x336.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=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org When compiling for windows-arm64 using clang-15, it reports a sometimes uninitialized variable. This seems to be a false positive, as a default case guards switch expressions, preventing to return an uninitialized value, but clang seems unhappy with assert(0) definition. Change code to g_assert_not_reached() fix the warning. Signed-off-by: Pierrick Bouvier Reviewed-by: Richard Henderson --- target/ppc/dfp_helper.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/ppc/dfp_helper.c b/target/ppc/dfp_helper.c index cc024316d5..0a40bcfee3 100644 --- a/target/ppc/dfp_helper.c +++ b/target/ppc/dfp_helper.c @@ -121,7 +121,7 @@ static void dfp_set_round_mode_from_immediate(uint8_t r, uint8_t rmc, case 3: /* use FPSCR rounding mode */ return; default: - assert(0); /* cannot get here */ + g_assert_not_reached(); /* cannot get here */ } } else { /* r == 1 */ switch (rmc & 3) { @@ -138,7 +138,7 @@ static void dfp_set_round_mode_from_immediate(uint8_t r, uint8_t rmc, rnd = DEC_ROUND_HALF_DOWN; break; default: - assert(0); /* cannot get here */ + g_assert_not_reached(); /* cannot get here */ } } decContextSetRounding(&dfp->context, rnd);