From nobody Mon Feb 9 02:35:24 2026 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=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1754535864; cv=none; d=zohomail.com; s=zohoarc; b=m8/aGvXENJ3KhxddKBkdkVTmJLWc5OLYUHURPQbNdLGCpJ3RqMiYvgrIYBFIYO18uLBPo+U+Rgl5SrFUJ2sUz4BgvIDc8RHj5X6CwafkPaOddxrEV38c3UgstAHG5k3h59uni6dSHxhjQVQQlpkhOHR6G0SAtqPqrCwAQ9WNsY0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1754535864; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=hox/JubKo6/V4q4RB3YlZQj7BLFXBniITJvVoESyKgw=; b=nmNhPk9DdOzVTsSzu6jBENFkX0DLfODy5/Vk5hqlESlsKU3ao3RTmqne0002lTiywNCCTQN9uMGe6YN/Jir4bX1hyhmPtzbNyFOVwmUDkYUGyNSbQjE7tMGij6RBHNu3riYXBV1FWlvoEOBs6/XV2yasZaiMnc0obehMwZzpMdA= 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 1754535864232867.0099591585002; Wed, 6 Aug 2025 20:04:24 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ujquP-0007rd-GZ; Wed, 06 Aug 2025 23:03:14 -0400 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 1ujqu8-0007kA-O9 for qemu-devel@nongnu.org; Wed, 06 Aug 2025 23:02:58 -0400 Received: from mail-pl1-x635.google.com ([2607:f8b0:4864:20::635]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ujqu2-0002Cb-Ph for qemu-devel@nongnu.org; Wed, 06 Aug 2025 23:02:54 -0400 Received: by mail-pl1-x635.google.com with SMTP id d9443c01a7336-23fe2be6061so3902745ad.0 for ; Wed, 06 Aug 2025 20:02:46 -0700 (PDT) Received: from ktock.. ([240d:1a:3b6:8b00:81e2:9f1d:777a:7b46]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-241d1ef6ac6sm173154585ad.1.2025.08.06.20.02.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Aug 2025 20:02:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1754535766; x=1755140566; darn=nongnu.org; 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=hox/JubKo6/V4q4RB3YlZQj7BLFXBniITJvVoESyKgw=; b=kyOGwx7h+lMyOVuQRSbb+4wljWnIjldgZHeGT7dQZ5ezLQS0FRzMi0J6hCybF+PfYE tlFAifKpW8RAMfc4MW8fp+65O9xSQ2pFRa67Df5gUS95FybRb9jjTxuFUbSQ2vyyKqiW biOEm1vjGkQ+E+IOr1uW5fIXD0GJehJW3CCorbPQlI6AWmz30tub4XCQZi9WKmbbhcPV gVq1oM+pyRX1Hga3q0zZit/vWZUEHjhiTMn85SYVOjo/NGgbyOBHmI7Ex2LPTODN/qNb TcHFTew1jsntIFvhNp1eYT6IhfB8GurGPZgo6O5MT0dz96MBCBoXOLb7cpdrlKLnt6Nx bNBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754535766; x=1755140566; 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=hox/JubKo6/V4q4RB3YlZQj7BLFXBniITJvVoESyKgw=; b=i0jwsIFLi2Pamolwl18z3XlEMa23WIlphbGNhDRDs1KJjXsQ5xwUPQaNXG1e0YPIwZ fKGu7f8hLQooxzieQioLywwSokPWXF0KPon48E/5x8fIIFn0v3USkCQUcK08JaIQx7ud ullVzqbLqNC/STLdvZs+trSdq4VWAsu5ERqwmuFfqFy54Tt/l4ImLTm3sZIG1T28znJa qnC896L7biDt3mDQR/smITT5eEk06dujFkJWAa5RoLk7FMfNCS7Cweok2Ue68HV97JPC oAX2m5HRO8KiBSmnkwtAxvc4sOIwETp29RcTdwT6oQ1fNtQYsdE6aU9Cu1Dj7ERR5AxY qYfg== X-Gm-Message-State: AOJu0YyxoD2ipR/IRieZftcQWtAvmb0QFj7m34viUIgMIY6wCCOdtxuu VX2FqCO5ceY8TW424TaJHP4tdvNXN2PSZedjaoIBlrry9cTRQWwYg6rmSVFDpw== X-Gm-Gg: ASbGnct3sFyi8RGz3EdkNYDy3jugb13QvRoAyrMTjRokXKwGXLgovI5lsl6ZQ50RJLY diQ9Y8rpLExIntHXI281YYGPEYZRfjW0i+PFXcCijIVozTT4MFIEFoS+4TGKTOUWKTJ2gHdqL4k PnL2SjIdGtNkGuwyA8f6dMGBQYhMC4RsanTebSB5hcjCWKutSAbCPSwT7Wbt7Kf5o0a+K/IWOyt BsGukilIQN9Xza3/+TDI3Gb4i99YjUKC5YmVZa2vp8qsFrSziqhSf3U2Ew6MOQ+4Skjqg+KNGga LHGZJ3NWyiv3l9GwAD55LXSaneAB1fSCIrwu7BDBo10i0pgKzw5CFteFcV0LlvVkibI/QgMC52n dehDU9ELh5KAa6WM2znE7TA== X-Google-Smtp-Source: AGHT+IHLQI2Ocyx0VbIDh14jWYebKsG+DqMKpojzTbVGSngXhTnAvGvOB9ehPRgDFB5YpGIkwED0YQ== X-Received: by 2002:a17:902:ef0a:b0:240:3245:6d40 with SMTP id d9443c01a7336-242b04d6139mr25838435ad.0.1754535765512; Wed, 06 Aug 2025 20:02:45 -0700 (PDT) From: Kohei Tokunaga To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Thomas Huth , Paolo Bonzini , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Stefan Hajnoczi , Pierrick Bouvier , ktokunaga.mail@gmail.com Subject: [PATCH v3 2/4] configure: Enable to propagate -sMEMORY64 flag to Emscripten Date: Thu, 7 Aug 2025 12:02:01 +0900 Message-ID: <574dee5a5cb19d15dbfbe94cea31de23189596a9.1754534225.git.ktokunaga.mail@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" 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::635; envelope-from=ktokunaga.mail@gmail.com; helo=mail-pl1-x635.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, FREEMAIL_FROM=0.001, 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 @gmail.com) X-ZM-MESSAGEID: 1754535866037116600 Currently there are some engines that don't support wasm64 (e.g. unsupported on Safari[1]). To mitigate this issue, the configure script allows the user to use Emscripten's compatibility feature, "-sMEMORY64=3D2" flag[2]. Emscripten's "-sMEMORY64=3D2" flag still enables 64bit pointers in C code. = But this flag lowers the output binary into wasm32, with limiting the maximum memory size to 4GB. So QEMU can run on wasm32 engines. [1] https://webassembly.org/features/ [2] https://emscripten.org/docs/tools_reference/settings_reference.html#mem= ory64 Signed-off-by: Kohei Tokunaga Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Pierrick Bouvier --- configure | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/configure b/configure index 7f3893a42f..0587577da9 100755 --- a/configure +++ b/configure @@ -182,6 +182,10 @@ EXTRA_CXXFLAGS=3D"" EXTRA_OBJCFLAGS=3D"" EXTRA_LDFLAGS=3D"" =20 +# The value is propagated to Emscripten's "-sMEMORY64" flag. +# https://emscripten.org/docs/tools_reference/settings_reference.html#memo= ry64 +wasm64_memory64=3D1 + # Default value for a variable defining feature "foo". # * foo=3D"no" feature will only be used if --enable-foo arg is given # * foo=3D"" feature will be searched for, and if found, will be used @@ -239,6 +243,8 @@ for opt do ;; --without-default-features) default_feature=3D"no" ;; + --wasm64-32bit-address-limit) wasm64_memory64=3D"2" + ;; esac done =20 @@ -537,7 +543,7 @@ case "$cpu" in CPU_CFLAGS=3D"-m32" ;; wasm64) - CPU_CFLAGS=3D"-m64 -sMEMORY64=3D1" + CPU_CFLAGS=3D"-m64 -sMEMORY64=3D$wasm64_memory64" ;; esac =20 @@ -795,6 +801,8 @@ for opt do ;; --disable-rust) rust=3Ddisabled ;; + --wasm64-32bit-address-limit) + ;; # everything else has the same name in configure and meson --*) meson_option_parse "$opt" "$optarg" ;; @@ -920,6 +928,8 @@ Advanced options (experts only): --disable-containers don't use containers for cross-building --container-engine=3DTYPE which container engine to use [$container_eng= ine] --gdb=3DGDB-path gdb to use for gdbstub tests [$gdb_bin] + --wasm64-32bit-address-limit Restrict wasm64 address space to 32-bit (de= fault + is to use the whole 64-bit range). EOF meson_options_help cat << EOF --=20 2.43.0