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[98.147.7.212]) by smtp.gmail.com with ESMTPSA id z26-20020aa785da000000b006e64ddfa71asm7654894pfn.170.2024.04.08.22.03.23 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 Apr 2024 22:03:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1712639004; x=1713243804; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=6eUFt2PWahbI/Q/BaP9MYWhwnfohtu4MmJvBHxZyZEg=; b=rsZ02lZZmNmC6hZQ53L05GcpCHmXoK5xrN2CrOPrhqR0DCKdnhUsg0SVGFGrRaxe/m JUF8Kh5PUd6yYZ4WgVRgFFYGocPMevD0Dqc5/m8zlWIdE78OcOVTuZ6QdzSEydE0jTS2 n0sX/cgSVoJjC97k4Cq1BdAoOxCmZ5zGRy5H+GDXuXjlTV8HKW40kYyg/JGNfCik+9Fa wh8mcbpJwLdDbqkTXskuY069t9B77W69zh3RJI6E97rLt0aU6Ez/sfHHVaQgY9LAfAER 3I6RworKQ3zCUyJGVgkqrXnUqivgqVvhD/OmiQ0XMT3u9SCN/tlWNIk38ACS85e6/emP SU3Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712639004; x=1713243804; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=6eUFt2PWahbI/Q/BaP9MYWhwnfohtu4MmJvBHxZyZEg=; b=XsyB7ph31jfMWugUuqTkAWkX+MXjNP2oG+sLDMZgmEgCsksyDVmXZU2wWgB7EdAWD1 Y0yU13sEu/0rTj/1CsHyMpyP493enPNnT63WULC6fVOQQU9c51gQuxTz9yp41IltWIK/ Xe2ko41AYL9BX5rg3nmxfCNQQH8H1OcNY2d29vGOBuS91NKmcZHoiEPn1XgGPDLZKpcW oEVocs7lj+ySP+JDnLgWHuDM4sqh0bp4b30LgJkkXnQI9swIGKzswQgL3La6RI5wOZov klHWdTjm8oLgKDJUOtP2FhPDXmWsiLY2LSAx+xfgD9n1/wuY5TpFoj2pXkUAvo9S34Fk 8dBA== X-Gm-Message-State: AOJu0YxOGzgkxZWYYUyCtUPPXSHvmoOEYdI1SfPmRXZ5uKCMmXwoPrlo TTjq1oX518WY6rmqwU+hoQ/FxSn44uaD4wqq0wLYaFi2rGxaaEHpvQJRkIJ2FkMOhifTFLkLN6G A X-Google-Smtp-Source: AGHT+IGzEnXyKXM7crOSOAu+LTrTajrQSLtLsCbJyM8v55oyJ4PEQIZM+wmvPzxjK4cNzm+86127HA== X-Received: by 2002:a05:6a00:c86:b0:6ea:b9a1:63d7 with SMTP id a6-20020a056a000c8600b006eab9a163d7mr12510999pfv.10.1712639004231; Mon, 08 Apr 2024 22:03:24 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 15/28] linux-user/i386: Drop xfeatures_size from sigcontext arithmetic Date: Mon, 8 Apr 2024 19:02:49 -1000 Message-Id: <20240409050302.1523277-16-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240409050302.1523277-1-richard.henderson@linaro.org> References: <20240409050302.1523277-1-richard.henderson@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=2607:f8b0:4864:20::42e; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42e.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1712639129475100001 Content-Type: text/plain; charset="utf-8" This is subtracting sizeof(target_fpstate_fxsave) in TARGET_FXSAVE_SIZE, then adding it again via &fxsave->xfeatures. Perform the same computation using xstate_size alone. Signed-off-by: Richard Henderson --- linux-user/i386/signal.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index 68659fa1db..547c7cc685 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -252,7 +252,6 @@ static void xsave_sigcontext(CPUX86State *env, struct t= arget_fpstate_fxsave *fxs __put_user(0, &fxsave->sw_reserved.magic1); } else { uint32_t xstate_size =3D xsave_area_size(env->xcr0, false); - uint32_t xfeatures_size =3D xstate_size - TARGET_FXSAVE_SIZE; =20 /* * extended_size is the offset from fpstate_addr to right after th= e end @@ -272,7 +271,8 @@ static void xsave_sigcontext(CPUX86State *env, struct t= arget_fpstate_fxsave *fxs __put_user(extended_size, &fxsave->sw_reserved.extended_size); __put_user(env->xcr0, &fxsave->sw_reserved.xfeatures); __put_user(xstate_size, &fxsave->sw_reserved.xstate_size); - __put_user(TARGET_FP_XSTATE_MAGIC2, (uint32_t *) &fxsave->xfeature= s[xfeatures_size]); + __put_user(TARGET_FP_XSTATE_MAGIC2, + (uint32_t *)((void *)fxsave + xstate_size)); } } =20 @@ -558,7 +558,6 @@ static int xrstor_sigcontext(CPUX86State *env, struct t= arget_fpstate_fxsave *fxs if (env->features[FEAT_1_ECX] & CPUID_EXT_XSAVE) { uint32_t extended_size =3D tswapl(fxsave->sw_reserved.extended_siz= e); uint32_t xstate_size =3D tswapl(fxsave->sw_reserved.xstate_size); - uint32_t xfeatures_size =3D xstate_size - TARGET_FXSAVE_SIZE; =20 /* Linux checks MAGIC2 using xstate_size, not extended_size. */ if (tswapl(fxsave->sw_reserved.magic1) =3D=3D TARGET_FP_XSTATE_MAG= IC1 && @@ -567,7 +566,7 @@ static int xrstor_sigcontext(CPUX86State *env, struct t= arget_fpstate_fxsave *fxs extended_size - TARGET_FPSTATE_FXSAVE_OFFSET)) { return 1; } - if (tswapl(*(uint32_t *) &fxsave->xfeatures[xfeatures_size]) = =3D=3D TARGET_FP_XSTATE_MAGIC2) { + if (tswapl(*(uint32_t *)((void *)fxsave + xstate_size)) =3D=3D= TARGET_FP_XSTATE_MAGIC2) { cpu_x86_xrstor(env, fxsave_addr, -1); return 0; } --=20 2.34.1