PLATFORM_EMSCRIPTEN -> EMSCRIPTEN

.ci/wasm/build.sh

@@ -0,0 +1,92 @@
+#!/bin/sh -ex
+
+# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+NUM_JOBS=$(nproc 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null || echo 2)
+
+: "${CCACHE:=false}"
+RETURN=0
+
+usage() {
+    cat <<EOF
+Usage: $0 [-b|--build-type BUILD_TYPE] [-o|--outdir OUTPUT_DIRECTORY]
+
+Build script for Emscripten (using wasm64).
+
+Options:
+    --build-type    Set the CMake build type (Release|RelWithDebInfo|MinSizeRel|Debug)
+                    Default: Release
+    --outdir        Set the output directory
+                    Default: build
+
+EOF
+    exit "$RETURN"
+}
+
+die() {
+	echo "-- ! $*" >&2
+	RETURN=1 usage
+}
+
+type() {
+    [ -z "$1" ] && die "You must specify a valid type."
+    TYPE="$1"
+}
+
+outdir() {
+    [ -z "$1" ] && die "You must specify a valid output directory."
+    OUTDIR="$1"
+}
+
+while true; do
+	case "$1" in
+		-r|--release) DEVEL=false ;;
+		-b|--build-type) type "$2"; shift ;;
+		-o|--outdir) outdir "$2"; shift ;;
+		-h|--help) usage ;;
+		*) break ;;
+	esac
+	shift
+done
+
+: "${TYPE:=Release}"
+: "${DEVEL:=true}"
+: "${OUTDIR:=build}"
+
+# -sMEMORY64 must be specified twice, see below
+# The CMake toolchain file will match against MEMORY64 but will fail to match if:
+# - it's either -sMEMORY64
+# - or it's either -sMEMORY64=1
+# The line in question:
+# if (CMAKE_C_FLAGS MATCHES "MEMORY64")
+# However why need to specify -sMEMORY64=1 then? Oh that's because if you didn't set
+# the =1, it would assume you meant =0, which equates to not specifying it at all
+# This seems to be fixed in later versions but occurs atleast on 4.0.3-git and below.
+emcmake cmake -B "$OUTDIR" -G "Unix Makefiles" \
+    -DCMAKE_BUILD_TYPE=${TYPE} \
+    -DENABLE_OPENGL=OFF \
+    -DENABLE_LTO=OFF \
+    -DENABLE_QT=OFF \
+    -DENABLE_UNITY_BUILD=OFF \
+    -DENABLE_QT_TRANSLATION=OFF \
+    -DENABLE_CUBEB=OFF \
+    -DENABLE_LIBUSB=OFF \
+    -DENABLE_UPDATE_CHECKER=OFF \
+    -DENABLE_WEB_SERVICE=OFF \
+    -DUSE_DISCORD_PRESENCE=OFF \
+    -DENABLE_WIFI_SCAN=OFF \
+    -DUSE_FASTER_LINKER=ON \
+    -DYUZU_STATIC_BUILD=ON \
+    -DYUZU_USE_BUNDLED_OPENSSL=OFF \
+    -DYUZU_USE_EXTERNAL_FFMPEG=ON \
+    -Dzstd_FORCE_BUNDLED=ON \
+    -DOpenSSL_FORCE_BUNDLED=ON \
+    -DEMSCRIPTEN_SYSTEM_PROCESSOR=wasm \
+    -DCMAKE_C_FLAGS="-s MEMORY64 -m64 -pipe -sMEMORY64=1" \
+    -DCMAKE_CXX_FLAGS="-s MEMORY64 -m64 -pipe -sMEMORY64=1" \
+    -DCMAKE_EXE_LINKER_FLAGS="-sMEMORY64=1 -m64 -Wl,-mwasm64 -sASYNCIFY=1" \
+    -DCMAKE_C_LINK_FLAGS="-sMEMORY64=1 -m64 -Wl,-mwasm64 -sASYNCIFY=1" \
+    -DCMAKE_CXX_LINK_FLAGS="-sMEMORY64=1 -m64 -Wl,-mwasm64 -sASYNCIFY=1"
+
+cmake --build "$OUTDIR" -- -j$NUM_JOBS

.gitignore

@@ -63,6 +63,3 @@ artifacts
 /install*
 vulkansdk*.exe
 *.tar.zst
-
-# Build-time generated external sources
-externals/generated

.patch/openssl-cmake/0005-wasm-support.patch

@@ -0,0 +1,40 @@
+diff --git a/cmake/ConfigureOpenSSL.cmake b/cmake/ConfigureOpenSSL.cmake
+index 3012e05..2ae23ff 100644
+--- a/cmake/ConfigureOpenSSL.cmake
++++ b/cmake/ConfigureOpenSSL.cmake
+@@ -108,7 +108,8 @@ function(configure_openssl)
+     )
+ 
+     if(NOT "${CONFIGURE_OPTIONS_OLD}" STREQUAL "")
+-        if(CONFIGURE_OPTIONS STREQUAL CONFIGURE_OPTIONS_OLD)
++        # TODO(lizzie): Emscripten has issues with rebuilding due to the wrapper it uses
++        if(CMAKE_SYSTEM_NAME MATCHES "Emscripten" OR CONFIGURE_OPTIONS STREQUAL CONFIGURE_OPTIONS_OLD)
+             message(STATUS "Found previous configure results. Don't perform configuration")
+             return()
+         endif()
+@@ -134,10 +135,24 @@ function(configure_openssl)
+         set(VERBOSE_OPTION OUTPUT_QUIET)
+     endif()
+ 
++    if (CMAKE_SYSTEM_NAME MATCHES "Emscripten")
++        set(EMSCRIPTEN_CMAKE_WRAPPER "emcmake")
++        find_program(EMCC emcc REQUIRED)
++        set(EMSCRIPTEN_LINKER ${EMCC})
++        list(APPEND CONFIGURE_COMMAND wasm64)
++    else()
++        set(EMSCRIPTEN_CMAKE_WRAPPER "")
++        set(EMSCRIPTEN_LINKER ${CMAKE_LINKER})
++    endif ()
++
+     execute_process(
+-        COMMAND ${CMAKE_COMMAND} -E env
++        COMMAND ${EMSCRIPTEN_CMAKE_WRAPPER} ${CMAKE_COMMAND} -E env
+             "CFLAGS=${CMAKE_C_FLAGS}"
+             "CXXFLAGS=${CMAKE_CXX_FLAGS}"
++            "LDFLAGS=${CMAKE_CXX_LINK_FLAGS}"
++            "CC=${CMAKE_C_COMPILER}"
++            "CXX=${CMAKE_CXX_COMPILER}"
++            "LD=${EMSCRIPTEN_LINKER}"
+             ${CONFIGURE_COMMAND}
+         WORKING_DIRECTORY ${CONFIGURE_BUILD_DIR}
+         ${VERBOSE_OPTION}

.patch/openssl/0002-wasm-support.patch

@@ -0,0 +1,112 @@
+diff --git a/Configurations/10-main.conf b/Configurations/10-main.conf
+index e62721e..243feb4 100644
+--- a/Configurations/10-main.conf
++++ b/Configurations/10-main.conf
+@@ -1970,6 +1970,26 @@ my %targets = (
+         multilib         => "64",
+     },
+ 
++    "wasm32" => {
++        inherit_from     => [ "BASE_unix" ],
++        CC               => "emcc",
++        CXX              => "emc++",
++        cflags           => combine("--target=wasm32-unknown-emscripten", threads("-pthread")),
++        cxxflags         => combine("--target=wasm32-unknown-emscripten", threads("-pthread")),
++        lib_cppflags     => add("-DL_ENDIAN"),
++        bn_ops           => "THIRTY_TWO_BIT",
++    },
++    "wasm64" => {
++        inherit_from     => [ "BASE_unix" ],
++        CC               => "emcc",
++        CXX              => "emc++",
++        cflags           => combine("--target=wasm64-unknown-emscripten", threads("-pthread")),
++        cxxflags         => combine("--target=wasm64-unknown-emscripten", threads("-pthread")),
++        lib_cppflags     => add("-DL_ENDIAN"),
++        bn_ops           => "SIXTY_FOUR_BIT_LONG",
++    },
++
++
+ #### uClinux
+     "uClinux-dist" => {
+         inherit_from     => [ "BASE_unix" ],
+diff --git a/crypto/rand/rand_lib.c b/crypto/rand/rand_lib.c
+index d9e8f02..7faf347 100644
+--- a/crypto/rand/rand_lib.c
++++ b/crypto/rand/rand_lib.c
+@@ -379,17 +379,27 @@ void RAND_add(const void *buf, int num, double randomness)
+ #if !defined(OPENSSL_NO_DEPRECATED_1_1_0)
+ int RAND_pseudo_bytes(unsigned char *buf, int num)
+ {
++#if defined(__wasi__)
++    arc4random_buf(buf, num);
++    return 1;
++#elif defined(__EMSCRIPTEN__)
++    return 1;
++#else
+     const RAND_METHOD *meth = RAND_get_rand_method();
+ 
+     if (meth != NULL && meth->pseudorand != NULL)
+         return meth->pseudorand(buf, num);
+     ERR_raise(ERR_LIB_RAND, RAND_R_FUNC_NOT_IMPLEMENTED);
+     return -1;
++#endif
+ }
+ #endif
+ 
+ int RAND_status(void)
+ {
++#if defined(__EMSCRIPTEN__) || defined(__wasi__)
++    return 1;
++#else
+     EVP_RAND_CTX *rand;
+ #ifndef OPENSSL_NO_DEPRECATED_3_0
+     const RAND_METHOD *meth = RAND_get_rand_method();
+@@ -401,6 +411,7 @@ int RAND_status(void)
+     if ((rand = RAND_get0_primary(NULL)) == NULL)
+         return 0;
+     return EVP_RAND_get_state(rand) == EVP_RAND_STATE_READY;
++#endif
+ }
+ #else /* !FIPS_MODULE */
+ 
+@@ -420,6 +431,12 @@ const RAND_METHOD *RAND_get_rand_method(void)
+ int RAND_priv_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num,
+     unsigned int strength)
+ {
++#if defined(__wasi__)
++    arc4random_buf(buf, num);
++    return 1;
++#elif defined(__EMSCRIPTEN__)
++    return 1;
++#else
+     RAND_GLOBAL *dgbl;
+     EVP_RAND_CTX *rand;
+ #if !defined(OPENSSL_NO_DEPRECATED_3_0) && !defined(FIPS_MODULE)
+@@ -451,6 +468,7 @@ int RAND_priv_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num,
+         return EVP_RAND_generate(rand, buf, num, strength, 0, NULL, 0);
+ 
+     return 0;
++#endif
+ }
+ 
+ int RAND_priv_bytes(unsigned char *buf, int num)
+diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
+index 3d21801..e026f8f 100644
+--- a/ssl/ssl_cert.c
++++ b/ssl/ssl_cert.c
+@@ -941,6 +941,7 @@ done:
+     return ret;
+ }
+ 
++#ifndef OPENSSL_NO_POSIX_IO
+ int SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stack,
+     const char *dir)
+ {
+@@ -1016,6 +1017,7 @@ err:
+ 
+     return ret;
+ }
++#endif
+ 
+ static int add_uris_recursive(STACK_OF(X509_NAME) *stack,
+     const char *uri, int depth)

CMakeLists.txt

@@ -214,6 +214,8 @@ if(MSVC)
 endif()
 
 # TODO(crueter): Cleanup, each dep that has a bundled option should allow to choose between bundled, external, system
+cmake_dependent_option(YUZU_USE_BUNDLED_SDL3 "Download bundled SDL3 build" "${MSVC}" "NOT ANDROID" OFF)
+
 option(ENABLE_CUBEB "Enables the cubeb audio backend" ON)
 
 set(EXT_DEFAULT OFF)
@@ -221,8 +223,6 @@ if (MSVC OR ANDROID)
     set(EXT_DEFAULT ON)
 endif()
 
-option(YUZU_USE_BUNDLED_SDL3 "Download bundled SDL3 build" ${EXT_DEFAULT})
-
 # ffmpeg
 option(YUZU_USE_BUNDLED_FFMPEG "Download bundled FFmpeg" ${EXT_DEFAULT})
 cmake_dependent_option(YUZU_USE_EXTERNAL_FFMPEG "Build FFmpeg from external source" "${SOLARIS}" "NOT WIN32 AND NOT ANDROID" OFF)
@@ -238,7 +238,7 @@ option(YUZU_USE_BUNDLED_SIRIT "Download bundled sirit" ${BUNDLED_SIRIT_DEFAULT})
 # FreeBSD 15+ has libusb, versions below should disable it
 cmake_dependent_option(ENABLE_LIBUSB "Enable the use of LibUSB" ON "WIN32 OR LINUX OR FREEBSD OR APPLE" OFF)
 
-cmake_dependent_option(ENABLE_OPENGL "Enable OpenGL" ON "NOT (WIN32 AND ARCHITECTURE_arm64) AND NOT APPLE AND NOT ANDROID" OFF)
+cmake_dependent_option(ENABLE_OPENGL "Enable OpenGL" ON "NOT (WIN32 AND ARCHITECTURE_arm64) AND NOT APPLE" OFF)
 mark_as_advanced(FORCE ENABLE_OPENGL)
 
 option(ENABLE_WEB_SERVICE "Enable web services (telemetry, etc.)" ON)
@@ -377,6 +377,15 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 # Prefer the -pthread flag on Linux.
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
+# It is absolutely promordial to enable on Emscripten
+# Not only this allows to use std::thread and std::jthread without exceptions
+# but it also fixes several issues related to MT operations.
+# ...and CMake doesn't include it by default even when we specify
+# that we prefer the pthread flag; why is that? I don't know.
+if (EMSCRIPTEN)
+    add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-pthread>)
+    add_link_options($<$<COMPILE_LANGUAGE:C,CXX>:-pthread>)
+endif()
 
 find_package(RenderDoc MODULE)
 
@@ -405,7 +414,12 @@ set(BUILD_TESTING OFF)
 set(ENABLE_TESTING OFF)
 
 # boost
-set(BOOST_INCLUDE_LIBRARIES algorithm icl pool container heap asio headers process filesystem crc variant)
+if (EMSCRIPTEN)
+    set(BOOST_INCLUDE_LIBRARIES algorithm icl pool container heap headers filesystem crc variant)
+    set(BOOST_CONTAINER_HEADER_ONLY ON)
+else()
+    set(BOOST_INCLUDE_LIBRARIES algorithm icl pool container heap asio headers process filesystem crc variant)
+endif()
 
 AddJsonPackage(boost)
 
@@ -426,10 +440,12 @@ if (Boost_ADDED)
 
         target_compile_options(boost_heap INTERFACE $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-shadow>)
         target_compile_options(boost_icl INTERFACE $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-shadow>)
-        target_compile_options(boost_asio INTERFACE
-            $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-conversion>
-            $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-implicit-fallthrough>
-        )
+        # May not exist (i.e emscripten)
+        if (TARGET boost_asio)
+            target_compile_options(boost_asio INTERFACE
+                $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-conversion>
+                $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-implicit-fallthrough>)
+        endif()
     endif()
 endif()
 

cpmfile.json

@@ -115,7 +115,7 @@
         "find_args": "MODULE GLOBAL",
         "hash": "159ed94965018f2a371d45a3bfc1961e5fb1549e501ded70a6b4532d7fe99d0579c18b5195aff6e35f96f399b426cea2650ec9fb75ef80d4c9edeccb51f2e6c9",
         "options": [
-            "HTTPLIB_REQUIRE_OPENSSL ON",
+            "HTTPLIB_REQUIRE_OPENSSL OFF",
             "HTTPLIB_DISABLE_MACOSX_AUTOMATIC_ROOT_CERTIFICATES ON"
         ],
         "patches": [
@@ -186,12 +186,19 @@
         "repo": "eden-emulator/oaknut",
         "version": "v2.0.3"
     },
+    "oboe": {
+        "bundled": true,
+        "hash": "ce4011afe7345370d4ead3b891cd69a5ef224b129535783586c0ca75051d303ed446e6c7f10bde8da31fff58d6e307f1732a3ffd03b249f9ef1fd48fd4132715",
+        "repo": "google/oboe",
+        "version": "1.10.0"
+    },
     "openssl": {
         "hash": "29002ce50cb95a4f4f1d0e9d3f684401fbd4eac34203dc2eef3b6334af5d44aa46bf788b63a6f5c139c383eafb7269ae87a58a9a3ad5912903b9773e545ccc0a",
         "min_version": "3.0.0",
         "package": "OpenSSL",
         "patches": [
-            "0001-add-bundled-cert.patch"
+            "0001-add-bundled-cert.patch",
+            "0002-wasm-support.patch"
         ],
         "repo": "openssl/openssl",
         "version": "openssl-3.6.2"
@@ -213,7 +220,8 @@
             "0001-cpmutil-compat.patch",
             "0002-use-ccache.patch",
             "0003-use-cmake-compiler-flags.patch",
-            "0004-use-shell-wrapper.patch"
+            "0004-use-shell-wrapper.patch",
+            "0005-wasm-support.patch"
         ],
         "repo": "jimmy-park/openssl-cmake",
         "version": "3.6.2"

docs/Caveats.md

@@ -12,6 +12,7 @@
 - [NetBSD](#netbsd)
 - [MSYS2](#msys2)
 - [RedoxOS](#redoxos)
+- [WebAssembly](#webassembly)
 <!-- /TOC -->
 
 ## Arch Linux
@@ -242,3 +243,19 @@ find ./*/ -name "*.dll" | while read -r dll; do deps "$dll"; done
 The package install may randomly hang at times, in which case it has to be restarted. ALWAYS do a `sudo pkg update` or the chances of it hanging will be close to 90%. If "multiple" installs fail at once, try installing 1 by 1 the packages.
 
 When CMake invokes certain file syscalls - it may sometimes cause crashes or corruptions on the (kernel?) address space - so reboot the system if there is a "hang" in CMake.
+
+## WebAssembly
+
+**It doesn't run on a browser yet.**
+
+WebAssembly or "WASM" for short is a *mainly 32-bit* virtual "architecture" which we only bootstrap on 64-bit only. This means not only the program runs 2x slower than it would due to using JS BigInt, it also means we need to go out of our way to enable proper 64-bit support via `-sMEMORY64=1`, however once again, some Emscripten quirks force us to specify `-s MEMORY64` and `-sMEMORY64=1` at the same time: see the [CI build script](../.ci/wasm/build.sh).
+
+The WebAssembly target is very heavy on resources and requires at least 4 times the normal amount of resources that a native build would. Additionally, the only supported environment is Firefox at the moment, node.js and `wasmtime are not supported (PRs welcome!)
+
+If running under Firefox and you hit "out of memory" on dev console, close the entire tab, then open it back again, see [this issue](https://github.com/emscripten-core/emscripten/issues/8126).
+
+To run the binary (after building) you should be fine with `node ./eden-cli.js`. For obvious reasons no Qt frontend is available on WASM, support for Vulkan is done charily via [llvmpipe2wasm](https://github.com/Devsh-Graphics-Programming/llvmpipe2wasm).
+
+If you run into the error "acorn.js can't be found" check [this associated issue](https://github.com/emscripten-core/emscripten/issues/13368), the fix in short is `npm --global install acorn`. On FreeBSD you could run `npm` under root, or you could do the sane thing and do `sudo chown -R $USER /usr/local/lib/node_modules/ /usr/local/bin/` (remember to restore permissions afterwards!) unless you wish to run `npm` under root which is generally a bad idea.
+
+2026-06-09: As of writing, no Dynarmic-based JIT is possible on this target, full interpreted emulation is the only reasonable option. While there is some efforts on making a JIT like [here](https://github.com/wingo/wasm-jit) or [here](https://wingolog.org/archives/2022/08/18/just-in-time-code-generation-within-webassembly), the result is so latency expensive we're better off using an interpreter instead.

docs/Deps.md

@@ -361,6 +361,14 @@ pkgman install git cmake patch libfmt_devel nlohmann_json lz4_devel opus_devel b
 
 [Caveats](./Caveats.md#haikuos).
 
+</details>
+<details>
+<summary>WebAssembly</summary>
+
+Emscripten: The default installation should provide enough.
+
+[Caveats](./Caveats.md#wasm).
+
 </details>
 <details>
 <summary>RedoxOS</summary>

docs/Options.md

@@ -76,7 +76,7 @@ The following options are desktop only.
 
 - `ENABLE_LIBUSB` (ON) Enable the use of the libusb input backend (HIGHLY RECOMMENDED)
 - `ENABLE_OPENGL` (ON) Enable the OpenGL graphics backend
-  - Unavailable on Windows/ARM64 and on Android
+  - Unavailable on Windows/ARM64
   - You probably shouldn't turn this off.
 
 ### Qt

externals/CMakeLists.txt

@@ -136,50 +136,49 @@ if(ENABLE_CUBEB)
     endif()
 endif()
 
-if (NOT YUZU_USE_BUNDLED_SDL3)
-    if (NOT WIN32)
-        # Yuzu itself needs: Atomic Audio Events Joystick Haptic Sensor Threads Timers
-        # Since 2.0.18 Atomic+Threads required for HIDAPI/libusb (see https://github.com/libsdl-org/SDL/issues/5095)
-        # Yuzu-cmd also needs: Video (depends on Loadso/Dlopen)
-        # CPUinfo also required for SDL Audio, at least until 2.28.0 (see https://github.com/libsdl-org/SDL/issues/7809)
-        set(SDL_UNUSED_SUBSYSTEMS
-            File Filesystem
-            Locale Power Render)
-        foreach(_SUB ${SDL_UNUSED_SUBSYSTEMS})
-          string(TOUPPER ${_SUB} _OPT)
-          set(SDL_${_OPT} OFF)
-        endforeach()
+if (NOT ANDROID)
+    if (NOT YUZU_USE_BUNDLED_SDL3)
+        if (NOT WIN32)
+            # Yuzu itself needs: Atomic Audio Events Joystick Haptic Sensor Threads Timers
+            # Since 2.0.18 Atomic+Threads required for HIDAPI/libusb (see https://github.com/libsdl-org/SDL/issues/5095)
+            # Yuzu-cmd also needs: Video (depends on Loadso/Dlopen)
+            # CPUinfo also required for SDL Audio, at least until 2.28.0 (see https://github.com/libsdl-org/SDL/issues/7809)
+            set(SDL_UNUSED_SUBSYSTEMS
+                File Filesystem
+                Locale Power Render)
+            foreach(_SUB ${SDL_UNUSED_SUBSYSTEMS})
+              string(TOUPPER ${_SUB} _OPT)
+              set(SDL_${_OPT} OFF)
+            endforeach()
 
-        set(HIDAPI ON)
-    endif()
+            set(HIDAPI ON)
+        endif()
 
-    if (APPLE)
-        set(SDL_FILE ON)
-    endif()
+        if (APPLE)
+            set(SDL_FILE ON)
+        endif()
 
-    AddJsonPackage(sdl3)
-else()
-    message(STATUS "Using bundled SDL3")
-    AddJsonPackage(sdl3-ci)
-
-    # copy sdl java sources for consumption by Gradle
-    if (ANDROID)
-        file(COPY ${SDL3_SOURCE_DIR}/java DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/generated/sdl)
-    endif()
-endif()
-
-# Normalize SDL3 link target across package variants.
-# Some SDL3 packages export only SDL3::SDL3-shared or SDL3::SDL3-static.
-if (NOT TARGET SDL3::SDL3)
-    if (TARGET SDL3::SDL3-shared)
-        add_library(SDL3::SDL3 ALIAS SDL3::SDL3-shared)
-    elseif (TARGET SDL3::SDL3-static)
-        add_library(SDL3::SDL3 ALIAS SDL3::SDL3-static)
+        AddJsonPackage(sdl3)
     else()
-        message(FATAL_ERROR "SDL3 package found, but no usable SDL3 target was exported")
+        message(STATUS "Using bundled SDL3")
+        AddJsonPackage(sdl3-ci)
+    endif()
+
+    # Normalize SDL3 link target across package variants.
+    # Some SDL3 packages export only SDL3::SDL3-shared or SDL3::SDL3-static.
+    if (NOT TARGET SDL3::SDL3)
+        if (TARGET SDL3::SDL3-shared)
+            add_library(SDL3::SDL3 ALIAS SDL3::SDL3-shared)
+        elseif (TARGET SDL3::SDL3-static)
+            add_library(SDL3::SDL3 ALIAS SDL3::SDL3-static)
+        else()
+            message(FATAL_ERROR "SDL3 package found, but no usable SDL3 target was exported")
+        endif()
     endif()
 endif()
 
+set(BUILD_SHARED_LIBS OFF)
+
 # SPIRV Headers
 AddJsonPackage(spirv-headers)
 
@@ -386,6 +385,13 @@ if (YUZU_CRASH_DUMPS AND NOT TARGET libbreakpad_client)
     endif()
 endif()
 
+# oboe
+if (ANDROID)
+    AddJsonPackage(oboe)
+
+    add_library(oboe::oboe ALIAS oboe)
+endif()
+
 if (APPLE)
     # moltenvk
     if (NOT YUZU_USE_BUNDLED_MOLTENVK)

externals/cmake-modules/DetectArchitecture.cmake

@@ -94,6 +94,10 @@ function(detect_architecture_symbols)
 endfunction()
 
 # arches here are put in a sane default order of importance
+# EXCEPT FOR WASM, which must be probed for FIRST, because some genius
+# decided to also allow the host architecture to be defined when building
+# for the emscripten target, absolutely lovely detail.
+#
 # notably, amd64, arm64, and riscv (in order) are BY FAR the most common
 # mips is pretty popular in embedded
 # ppc64 is pretty popular in supercomputing
@@ -101,6 +105,11 @@ endfunction()
 # ia64 exists
 # the rest exist, but are probably less popular than ia64
 
+detect_architecture_symbols(
+    ARCH wasm
+    SYMBOLS
+        "__EMSCRIPTEN__")
+
 detect_architecture_symbols(
     ARCH arm64
     SYMBOLS
@@ -203,11 +212,6 @@ detect_architecture_symbols(
         "__loongarch__"
         "__loongarch64")
 
-detect_architecture_symbols(
-    ARCH wasm
-    SYMBOLS
-        "__EMSCRIPTEN__")
-
 # "generic" target
 # If you have reached this point, you're on some as-of-yet unsupported architecture.
 # See the docs up above for known unsupported architectures

externals/cmake-modules/DetectPlatform.cmake

@@ -20,6 +20,9 @@ elseif (${CMAKE_SYSTEM_NAME} STREQUAL "managarm")
     set(MANAGARM ON)
 elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Haiku")
     set(HAIKUOS ON)
+elseif (${CMAKE_SYSTEM_NAME} STREQUAL "Emscripten")
+    set(EMSCRIPTEN ON)
+    message(WARNING "${CMAKE_LIBRARY_ARCHITECTURE} support is highly experimental!!!")
 endif()
 
 # BSD
@@ -97,3 +100,25 @@ if (MINGW)
     set(CMAKE_EXE_LINKER_FLAGS_RELEASE
         "${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${MINGW_FLAGS}")
 endif()
+
+if (EMSCRIPTEN)
+    set(EMSCRIPTEN_C_FLAGS "-s MEMORY64 -m64 -pipe -sMEMORY64=1")
+    set(EMSCRIPTEN_LINK_FLAGS "-sMEMORY64=1 -m64 -Wl,-mwasm64 -sASYNCIFY=1")
+
+    # This prevents FFmpeg and other libraries from assuming it's the host's CPU
+    # Additionally some Emscripten installs may not be very good... generally
+    set(EMSCRIPTEN_SYSTEM_PROCESSOR wasm)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EMSCRIPTEN_C_FLAGS}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS} ${EMSCRIPTEN_C_FLAGS}")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
+    set(CMAKE_C_LINK_FLAGS "${CMAKE_C_LINK_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
+    set(CMAKE_CXX_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} ${EMSCRIPTEN_LINK_FLAGS}")
+
+    unset(EMSCRIPTEN_C_FLAGS)
+    unset(EMSCRIPTEN_LINK_FLAGS)
+endif()
+
+# awesome
+if (FREEBSD OR DRAGONFLYBSD)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L${CMAKE_SYSROOT}/usr/local/lib")
+endif()

externals/ffmpeg/CMakeLists.txt

@@ -35,26 +35,37 @@ if (NOT YUZU_USE_BUNDLED_FFMPEG)
     elseif (NOT (CMAKE_HOST_SYSTEM_PROCESSOR MATCHES CMAKE_SYSTEM_PROCESSOR
     AND CMAKE_HOST_SYSTEM_NAME MATCHES CMAKE_SYSTEM_NAME))
         string(TOLOWER "${CMAKE_SYSTEM_NAME}" FFmpeg_SYSTEM_NAME)
-        if (FFmpeg_SYSTEM_NAME STREQUAL "openorbis" OR FFmpeg_SYSTEM_NAME STREQUAL "managarm")
+        # All of these platforms are supported by ffmpeg as native build OSes
+        # anything else (like Redox or Managarm or PS4) is NOT natively supported
+        # hence, assume the "unix like" is just "none" for the sake of OUR sanity.
+        # If YOUR OS/platform has actual native support:
+        # 1. fucking congrats
+        # 2. feel free to add it on the condition below
+        if (NOT (NETBSD OR SOLARIS OR FREEBSD OR OPENBSD OR DRAGONFLYBSD OR HAIKU
+        OR LINUX OR MSYS OR WIN32 OR ANDROID OR APPLE))
             set(FFmpeg_SYSTEM_NAME "none")
         endif()
         # TODO: Can we really do better? Auto-detection? Something clever?
         list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
             --enable-cross-compile
             --arch="${CMAKE_SYSTEM_PROCESSOR}"
-            --target-os="${FFmpeg_SYSTEM_NAME}"
-            --sysroot="${CMAKE_SYSROOT}"
-        )
+            --target-os="${FFmpeg_SYSTEM_NAME}")
+        # Emscripten doesn't use CMAKE_SYSROOT I'm afraid, but it does well use EMSCRIPTEN_SYSROOT
+        if (EMSCRIPTEN)
+            list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --sysroot="${EMSCRIPTEN_SYSROOT}")
+        else()
+            list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --sysroot="${CMAKE_SYSROOT}")
+        endif()
         if (DEFINED FFmpeg_CROSS_PREFIX)
             list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --cross-prefix="${FFmpeg_CROSS_PREFIX}")
         else()
-            message(WARNING "Please set FFmpeg_CROSS_PREFIX to your cross toolchain prefix, for example: \${CMAKE_STAGING_PREFIX}/bin/${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}-")
+            message(WARNING "Please set FFmpeg_CROSS_PREFIX to your cross toolchain prefix, for example: ${CMAKE_STAGING_PREFIX}/bin/${CMAKE_SYSTEM_PROCESSOR}-${CMAKE_SYSTEM_NAME}")
         endif()
         set(FFmpeg_IS_CROSS_COMPILING TRUE)
     endif()
 endif()
 
-if (OPENORBIS OR MANAGARM)
+if (OPENORBIS OR MANAGARM OR EMSCRIPTEN)
     # Doesn't support VA-API, don't go thru the embarrassment of trying to enable it
     list(APPEND FFmpeg_HWACCEL_FLAGS --disable-vaapi)
 elseif (ANDROID)
@@ -162,8 +173,7 @@ if (OPENORBIS)
         -lSceUserService
         -lSceSysmodule
         -lSceNet
-        -lSceLibcInternal
-    )
+        -lSceLibcInternal)
     list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
         --disable-pthreads
         --extra-cflags=${CMAKE_SYSROOT}/usr/include
@@ -174,8 +184,18 @@ elseif (MANAGARM)
     # Required for proper stuff
     list(APPEND FFmpeg_CROSS_COMPILE_FLAGS
         --disable-pthreads
-        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}"
-    )
+        --extra-libs="${FFmpeg_CROSS_COMPILE_LIBS}")
+endif()
+
+# Usually used by Emscripten
+if (DEFINED CMAKE_AR)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --ar=${CMAKE_AR})
+endif()
+if (DEFINED CMAKE_NM)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --nm=${CMAKE_NM})
+endif()
+if (DEFINED CMAKE_RANLIB)
+    list(APPEND FFmpeg_CROSS_COMPILE_FLAGS --ranlib=${CMAKE_RANLIB})
 endif()
 
 if (YUZU_USE_BUNDLED_FFMPEG)
@@ -205,6 +225,7 @@ else()
     # Build FFmpeg from externals
     message(STATUS "Using FFmpeg from externals")
 
+    set(FFmpeg_LD ${CMAKE_LINKER})
     if (CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64|amd64)")
         # FFmpeg has source that requires one of nasm or yasm to assemble it.
         # REQUIRED throws an error if not found here during configuration rather than during compilation.
@@ -213,6 +234,12 @@ else()
             message(FATAL_ERROR "One of either `nasm` or `yasm` not found but is required.")
         endif()
     endif()
+    if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+        # TODO: this is 100% redundant but we need it because CMAKE_LINKER can resolve to ld.lld
+        # which is NOT compatible
+        find_program(EMCC NAMES emcc REQUIRED)
+        set(FFmpeg_LD ${EMCC})
+    endif()
 
     find_program(AUTOCONF autoconf)
     if ("${AUTOCONF}" STREQUAL "AUTOCONF-NOTFOUND")
@@ -246,7 +273,13 @@ else()
             CACHE PATH "Paths to FFmpeg libraries" FORCE)
     endforeach()
 
-    find_program(BASH_PROGRAM bash REQUIRED)
+    # Some SDKs (especially wasm) require us, actually, WANT us to use their "emconfigure"
+    # otherwise they will cry a billion tears
+    if (EMSCRIPTEN)
+        find_program(FFmpeg_CONFIGURE_WRAPPER emconfigure REQUIRED)
+    else()
+        find_program(FFmpeg_CONFIGURE_WRAPPER bash REQUIRED)
+    endif()
 
     # `configure` parameters builds only exactly what yuzu needs from FFmpeg
     # `--disable-vdpau` is needed to avoid linking issues
@@ -256,7 +289,7 @@ else()
         OUTPUT
             ${FFmpeg_MAKEFILE}
         COMMAND
-            ${BASH_PROGRAM} ${FFmpeg_PREFIX}/configure
+            ${FFmpeg_CONFIGURE_WRAPPER} ${FFmpeg_PREFIX}/configure
                 --disable-avdevice
                 --disable-avformat
                 --disable-doc
@@ -265,6 +298,10 @@ else()
                 --disable-ffprobe
                 --disable-network
                 --disable-swresample
+                --disable-autodetect
+                --disable-runtime-cpudetect
+                --disable-debug
+                --disable-programs
                 --enable-decoder=h264
                 --enable-decoder=vp8
                 --enable-decoder=vp9
@@ -272,7 +309,7 @@ else()
                 --enable-pic
                 --cc=${FFmpeg_CC}
                 --cxx=${FFmpeg_CXX}
-                --ld=${CMAKE_LINKER}
+                --ld=${FFmpeg_LD}
                 --extra-cflags=${CMAKE_C_FLAGS}
                 --extra-cxxflags=${CMAKE_CXX_FLAGS}
                 --extra-ldflags=${CMAKE_C_LINK_FLAGS}
@@ -288,11 +325,7 @@ else()
 
     # Workaround for Ubuntu 18.04's older version of make not being able to call make as a child
     # with context of the jobserver. Also helps ninja users.
-    execute_process(
-        COMMAND
-            nproc
-        OUTPUT_VARIABLE
-            SYSTEM_THREADS)
+    cmake_host_system_information(RESULT SYSTEM_THREADS QUERY NUMBER_OF_LOGICAL_CORES)
 
     set(FFmpeg_BUILD_LIBRARIES ${FFmpeg_LIBRARIES})
 
@@ -300,6 +333,8 @@ else()
     if (LINUX OR ANDROID OR APPLE OR WIN32 OR FREEBSD)
         set(FFmpeg_MAKE_ARGS -j${SYSTEM_THREADS})
     else()
+        # No GNU make implies that this system may be highly non-GNU
+        find_program(MAKE make required)
         set(FFmpeg_MAKE_ARGS "")
     endif()
 
@@ -307,7 +342,7 @@ else()
         OUTPUT
             ${FFmpeg_BUILD_LIBRARIES}
         COMMAND
-            gmake ${FFmpeg_MAKE_ARGS}
+            ${MAKE} ${FFmpeg_MAKE_ARGS}
         WORKING_DIRECTORY
             ${FFmpeg_BUILD_DIR}
     )

externals/tz/tz/tz.cpp

@@ -14,7 +14,9 @@
 namespace Tz {
 
 namespace {
+#ifndef EINVAL
 #define EINVAL 22
+#endif
 
 static Rule gmtmem{};
 static Rule* const gmtptr = &gmtmem;

src/CMakeLists.txt

@@ -177,7 +177,6 @@ else()
         $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-invalid-offsetof>
         $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-unused-parameter>
         $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-missing-field-initializers>)
-
     if (CXX_CLANG OR CXX_ICC OR CXX_APPLE) # Clang, AppleClang, or Intel C++
         if (NOT MSVC)
             add_compile_options(
@@ -191,7 +190,11 @@ else()
             $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-nullability-completeness>)
     endif()
 
-    if (ARCHITECTURE_x86_64)
+    if (ARCHITECTURE_wasm)
+        # we are evil but fmt is even more evil
+        add_compile_options(
+            $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-shorten-64-to-32>)
+    elseif (ARCHITECTURE_x86_64)
         add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-mcx16>)
         if (LINUX OR FREEBSD)
             add_compile_options($<$<COMPILE_LANGUAGE:C,CXX>:-mtls-dialect=gnu2>)

src/android/app/build.gradle.kts

@@ -272,13 +272,6 @@ android {
         resValue("string", "app_name_suffixed", "$currentName$suffix")
         resValue("string", "app_name", "Eden$suffix")
     }
-
-    sourceSets {
-        named("main") {
-            java.srcDir("${edenDir}/externals/generated/sdl/java")
-            kotlin.srcDir("${edenDir}/externals/generated/sdl/java")
-        }
-    }
 }
 
 idea {

src/android/app/proguard-rules.pro

@@ -9,9 +9,6 @@
 -keep class org.ini4j.spi.IniBuilder
 -keep class org.ini4j.spi.IniFormatter
 
--keep class org.libsdl.app.** { *; }
--keepclassmembers class org.libsdl.app.** { *; }
-
 # Suppress warnings for R8
 -dontwarn org.bouncycastle.jsse.BCSSLParameters
 -dontwarn org.bouncycastle.jsse.BCSSLSocket

src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt

@@ -16,7 +16,6 @@ import android.widget.TextView
 import androidx.annotation.Keep
 import androidx.core.net.toUri
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
-import org.libsdl.app.SDL
 import java.lang.ref.WeakReference
 import org.yuzu.yuzu_emu.activities.EmulationActivity
 import org.yuzu.yuzu_emu.fragments.CoreErrorDialogFragment
@@ -53,8 +52,6 @@ object NativeLibrary {
     init {
         try {
             System.loadLibrary("yuzu-android")
-            SDL.setupJNI()
-            initJvm()
         } catch (ex: UnsatisfiedLinkError) {
             error("[NativeLibrary] $ex")
         }
@@ -370,7 +367,6 @@ object NativeLibrary {
         NetPlayManager.clearChat()
     }
 
-    external fun initJvm()
     external fun initMultiplayer()
 
     @Keep

src/android/app/src/main/jni/CMakeLists.txt

@@ -22,7 +22,7 @@ add_library(yuzu-android SHARED
 set_property(TARGET yuzu-android PROPERTY IMPORTED_LOCATION ${FFmpeg_LIBRARY_DIR})
 
 target_link_libraries(yuzu-android PRIVATE audio_core common core input_common frontend_common video_core)
-target_link_libraries(yuzu-android PRIVATE android camera2ndk EGL glad jnigraphics log GLESv2)
+target_link_libraries(yuzu-android PRIVATE android camera2ndk EGL glad jnigraphics log)
 if (ARCHITECTURE_arm64)
     target_link_libraries(yuzu-android PRIVATE adrenotools)
 endif()

src/android/app/src/main/jni/native.cpp

@@ -1730,15 +1730,6 @@ jint Java_org_yuzu_yuzu_1emu_NativeLibrary_loadAmiibo(JNIEnv* env, jobject jobj,
     return static_cast<jint>(info);
 }
 
-extern "C" JNIEXPORT void JNICALL
-Java_org_yuzu_yuzu_1emu_NativeLibrary_initJvm(JNIEnv *env, jclass clazz) {
-    JavaVM *vm;
-    if (env->GetJavaVM(&vm) != JNI_OK)
-        return;
-
-    Common::Android::Initialize(vm, env);
-}
-
 JNIEXPORT void JNICALL
 Java_org_yuzu_yuzu_1emu_NativeLibrary_initMultiplayer(
         JNIEnv* env, [[maybe_unused]] jobject obj) {

src/android/app/src/main/res/values-fa/strings.xml

@@ -800,6 +800,7 @@
     <string name="theme_mode_dark">تاریک</string>
 
     <!-- Audio output engines -->
+    <string name="oboe">oboe</string>
     <string name="cubeb">cubeb</string>
 
     <!-- Anisotropic filtering options -->

src/android/app/src/main/res/values/arrays.xml

@@ -465,13 +465,13 @@
 
     <string-array name="outputEngineEntries">
         <item>@string/auto</item>
-        <item>@string/sdl3</item>
+        <item>@string/oboe</item>
         <item>@string/cubeb</item>
         <item>@string/string_null</item>
     </string-array>
     <integer-array name="outputEngineValues">
         <item>0</item>
-        <item>2</item>
+        <item>4</item>
         <item>1</item>
         <item>3</item>
     </integer-array>

src/android/app/src/main/res/values/strings.xml

@@ -1240,7 +1240,7 @@
     <string name="theme_mode_dark">Dark</string>
 
     <!-- Audio output engines -->
-    <string name="sdl3" translatable="false">SDL3</string>
+    <string name="oboe" translatable="false">oboe</string>
     <string name="cubeb" translatable="false">cubeb</string>
 
     <!-- Anisotropic filtering options -->

src/audio_core/CMakeLists.txt

@@ -238,11 +238,20 @@ if (ENABLE_CUBEB)
     target_compile_definitions(audio_core PRIVATE HAVE_CUBEB=1)
 endif()
 
-target_sources(audio_core PRIVATE
-    sink/sdl3_sink.cpp
-    sink/sdl3_sink.h)
+if(ANDROID)
+    target_sources(audio_core PRIVATE
+        sink/oboe_sink.cpp
+        sink/oboe_sink.h)
 
-target_link_libraries(audio_core PRIVATE SDL3::SDL3)
-target_compile_definitions(audio_core PRIVATE HAVE_SDL3)
+    target_link_libraries(audio_core PRIVATE oboe)
+    target_compile_definitions(audio_core PUBLIC HAVE_OBOE)
+else()
+    target_sources(audio_core PRIVATE
+        sink/sdl3_sink.cpp
+        sink/sdl3_sink.h)
+
+    target_link_libraries(audio_core PRIVATE SDL3::SDL3)
+    target_compile_definitions(audio_core PRIVATE HAVE_SDL3)
+endif()
 
 create_target_directory_groups(audio_core)

src/audio_core/sink/oboe_sink.cpp

@@ -0,0 +1,230 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <span>
+#include <vector>
+
+#include <oboe/Oboe.h>
+
+#include "audio_core/common/common.h"
+#include "audio_core/sink/oboe_sink.h"
+#include "audio_core/sink/sink_stream.h"
+#include "common/logging.h"
+#include "common/scope_exit.h"
+#include "core/core.h"
+
+namespace AudioCore::Sink {
+
+class OboeSinkStream final : public SinkStream,
+                             public oboe::AudioStreamDataCallback,
+                             public oboe::AudioStreamErrorCallback {
+public:
+    explicit OboeSinkStream(Core::System& system_, StreamType type_, const std::string& name_,
+                            u32 system_channels_)
+        : SinkStream(system_, type_) {
+        name = name_;
+        system_channels = system_channels_;
+
+        this->OpenStream();
+    }
+
+    ~OboeSinkStream() override {
+        LOG_INFO(Audio_Sink, "Destroyed Oboe stream");
+    }
+
+    void Finalize() override {
+        this->Stop();
+        m_stream.reset();
+    }
+
+    void Start(bool resume = false) override {
+        if (!m_stream || !paused) {
+            return;
+        }
+
+        paused = false;
+
+        if (m_stream->start() != oboe::Result::OK) {
+            LOG_CRITICAL(Audio_Sink, "Error starting Oboe stream");
+        }
+    }
+
+    void Stop() override {
+        if (!m_stream || paused) {
+            return;
+        }
+
+        this->SignalPause();
+
+        if (m_stream->stop() != oboe::Result::OK) {
+            LOG_CRITICAL(Audio_Sink, "Error stopping Oboe stream");
+        }
+    }
+
+public:
+    static s32 QueryChannelCount(oboe::Direction direction) {
+        std::shared_ptr<oboe::AudioStream> temp_stream;
+        oboe::AudioStreamBuilder builder;
+
+        const auto result = ConfigureBuilder(builder, direction)->openStream(temp_stream);
+        if (result == oboe::Result::OK) {
+            return temp_stream->getChannelCount() >= 6 ? 6 : 2;
+        }
+
+        LOG_ERROR(Audio_Sink, "Failed to open {} stream. Using default channel count 2",
+                  direction == oboe::Direction::Output ? "output" : "input");
+        return 2;
+    }
+
+protected:
+    oboe::DataCallbackResult onAudioReady(oboe::AudioStream*, void* audio_data,
+                                          s32 num_buffer_frames) override {
+        const size_t num_channels = this->GetDeviceChannels();
+        const size_t frame_size = num_channels;
+        const size_t num_frames = static_cast<size_t>(num_buffer_frames);
+
+        if (type == StreamType::In) {
+            std::span<const s16> input_buffer{reinterpret_cast<const s16*>(audio_data),
+                                              num_frames * frame_size};
+            this->ProcessAudioIn(input_buffer, num_frames);
+        } else {
+            std::span<s16> output_buffer{reinterpret_cast<s16*>(audio_data),
+                                         num_frames * frame_size};
+            this->ProcessAudioOutAndRender(output_buffer, num_frames);
+        }
+
+        return oboe::DataCallbackResult::Continue;
+    }
+
+    void onErrorAfterClose(oboe::AudioStream*, oboe::Result) override {
+        LOG_INFO(Audio_Sink, "Audio stream closed, reinitializing");
+
+        if (this->OpenStream()) {
+            m_stream->start();
+        }
+    }
+
+private:
+    static oboe::AudioStreamBuilder* ConfigureBuilder(oboe::AudioStreamBuilder& builder,
+                                                      oboe::Direction direction) {
+        // TODO: investigate callback delay issues when using AAudio
+        return builder.setPerformanceMode(oboe::PerformanceMode::LowLatency)
+            ->setAudioApi(oboe::AudioApi::OpenSLES)
+            ->setDirection(direction)
+            ->setSampleRate(TargetSampleRate)
+            ->setSampleRateConversionQuality(oboe::SampleRateConversionQuality::High)
+            ->setFormat(oboe::AudioFormat::I16)
+            ->setFormatConversionAllowed(true)
+            ->setUsage(oboe::Usage::Game)
+            ->setBufferCapacityInFrames(TargetSampleCount * 2);
+    }
+
+    bool OpenStream() {
+        const auto direction = [&]() {
+            switch (type) {
+            case StreamType::In:
+                return oboe::Direction::Input;
+            case StreamType::Out:
+            case StreamType::Render:
+                return oboe::Direction::Output;
+            default:
+                ASSERT(false);
+                return oboe::Direction::Output;
+            }
+        }();
+
+        const auto expected_channels = QueryChannelCount(direction);
+        const auto expected_mask = [&]() {
+            switch (expected_channels) {
+            case 1:
+                return oboe::ChannelMask::Mono;
+            case 2:
+                return oboe::ChannelMask::Stereo;
+            case 6:
+                return oboe::ChannelMask::CM5Point1;
+            default:
+                ASSERT(false);
+                return oboe::ChannelMask::Unspecified;
+            }
+        }();
+
+        oboe::AudioStreamBuilder builder;
+        const auto result = ConfigureBuilder(builder, direction)
+                                ->setChannelCount(expected_channels)
+                                ->setChannelMask(expected_mask)
+                                ->setChannelConversionAllowed(true)
+                                ->setDataCallback(this)
+                                ->setErrorCallback(this)
+                                ->openStream(m_stream);
+        ASSERT(result == oboe::Result::OK);
+        return result == oboe::Result::OK && this->SetStreamProperties();
+    }
+
+    bool SetStreamProperties() {
+        ASSERT(m_stream);
+
+        m_stream->setBufferSizeInFrames(TargetSampleCount * 2);
+        device_channels = m_stream->getChannelCount();
+
+        const auto sample_rate = m_stream->getSampleRate();
+        const auto buffer_capacity = m_stream->getBufferCapacityInFrames();
+        const auto stream_backend =
+            m_stream->getAudioApi() == oboe::AudioApi::AAudio ? "AAudio" : "OpenSLES";
+
+        LOG_INFO(Audio_Sink, "Opened Oboe {} stream with {} channels sample rate {} capacity {}",
+                 stream_backend, device_channels, sample_rate, buffer_capacity);
+
+        return true;
+    }
+
+    std::shared_ptr<oboe::AudioStream> m_stream{};
+};
+
+OboeSink::OboeSink() {
+    // TODO: This is not generally knowable
+    // The channel count is distinct based on direction and can change
+    device_channels = OboeSinkStream::QueryChannelCount(oboe::Direction::Output);
+}
+
+OboeSink::~OboeSink() = default;
+
+SinkStream* OboeSink::AcquireSinkStream(Core::System& system, u32 system_channels,
+                                        const std::string& name, StreamType type) {
+    SinkStreamPtr& stream = sink_streams.emplace_back(
+        std::make_unique<OboeSinkStream>(system, type, name, system_channels));
+
+    return stream.get();
+}
+
+void OboeSink::CloseStream(SinkStream* to_remove) {
+    sink_streams.remove_if([&](auto& stream) { return stream.get() == to_remove; });
+}
+
+void OboeSink::CloseStreams() {
+    sink_streams.clear();
+}
+
+f32 OboeSink::GetDeviceVolume() const {
+    if (sink_streams.empty()) {
+        return 1.0f;
+    }
+
+    return sink_streams.front()->GetDeviceVolume();
+}
+
+void OboeSink::SetDeviceVolume(f32 volume) {
+    for (auto& stream : sink_streams) {
+        stream->SetDeviceVolume(volume);
+    }
+}
+
+void OboeSink::SetSystemVolume(f32 volume) {
+    for (auto& stream : sink_streams) {
+        stream->SetSystemVolume(volume);
+    }
+}
+
+} // namespace AudioCore::Sink

src/audio_core/sink/oboe_sink.h

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <list>
+#include <string>
+
+#include "audio_core/sink/sink.h"
+
+namespace Core {
+class System;
+}
+
+namespace AudioCore::Sink {
+class SinkStream;
+
+class OboeSink final : public Sink {
+public:
+    explicit OboeSink();
+    ~OboeSink() override;
+
+    /**
+     * Create a new sink stream.
+     *
+     * @param system          - Core system.
+     * @param system_channels - Number of channels the audio system expects.
+     *                          May differ from the device's channel count.
+     * @param name            - Name of this stream.
+     * @param type            - Type of this stream, render/in/out.
+     *
+     * @return A pointer to the created SinkStream
+     */
+    SinkStream* AcquireSinkStream(Core::System& system, u32 system_channels,
+                                  const std::string& name, StreamType type) override;
+
+    /**
+     * Close a given stream.
+     *
+     * @param stream - The stream to close.
+     */
+    void CloseStream(SinkStream* stream) override;
+
+    /**
+     * Close all streams.
+     */
+    void CloseStreams() override;
+
+    /**
+     * Get the device volume. Set from calls to the IAudioDevice service.
+     *
+     * @return Volume of the device.
+     */
+    f32 GetDeviceVolume() const override;
+
+    /**
+     * Set the device volume. Set from calls to the IAudioDevice service.
+     *
+     * @param volume - New volume of the device.
+     */
+    void SetDeviceVolume(f32 volume) override;
+
+    /**
+     * Set the system volume. Comes from the audio system using this stream.
+     *
+     * @param volume - New volume of the system.
+     */
+    void SetSystemVolume(f32 volume) override;
+
+private:
+    /// List of streams managed by this sink
+    std::list<SinkStreamPtr> sink_streams{};
+};
+
+} // namespace AudioCore::Sink

src/audio_core/sink/sink_details.cpp

@@ -10,6 +10,9 @@
 #include <vector>
 
 #include "audio_core/sink/sink_details.h"
+#ifdef HAVE_OBOE
+#include "audio_core/sink/oboe_sink.h"
+#endif
 #ifdef HAVE_CUBEB
 #include "audio_core/sink/cubeb_sink.h"
 #endif
@@ -40,8 +43,24 @@ struct SinkDetails {
     /// SuitableFn is_suitable; // REVERTED FOR LatencyFn latency ABOVE - DIABLO 3 FIX
 };
 
+// NOTE TO PROBABLY FIX LATER FOR ANDROID - the return value "0u" for the first HAVE_OBOE
+// section below was just copied from the null section so there's a somewhat valid value
+// being returned, since the previous "true" value probably isn't compatible with the
+// previous EA-3833 code. (HAVE_OBOE was introduced in a later release.) Eventually need
+// to change "0u" for something else directly from the oboe_sink.cpp functions.
+
 // sink_details is ordered in terms of desirability, with the best choice at the top.
 constexpr SinkDetails sink_details[] = {
+#ifdef HAVE_OBOE
+    SinkDetails{
+        Settings::AudioEngine::Oboe,
+        [](std::string_view device_id) -> std::unique_ptr<Sink> {
+            return std::make_unique<OboeSink>();
+        },
+        [](bool capture) { return std::vector<std::string>{"Default"}; },
+        []() { return 0u; },
+    },
+#endif
 #ifdef HAVE_CUBEB
     SinkDetails{
         Settings::AudioEngine::Cubeb,

src/common/CMakeLists.txt

@@ -236,7 +236,11 @@ else()
     target_link_libraries(common PUBLIC Boost::headers)
 endif()
 target_link_libraries(common PRIVATE OpenSSL::SSL)
-target_link_libraries(common PUBLIC Boost::filesystem Boost::context httplib::httplib nlohmann_json::nlohmann_json)
+target_link_libraries(common PUBLIC Boost::filesystem httplib::httplib nlohmann_json::nlohmann_json)
+if (NOT EMSCRIPTEN)
+    # Emscripten is: "bring your own implementation", boost doesn't add upstream support sadly
+    target_link_libraries(common PRIVATE Boost::context)
+endif()
 
 if (lz4_ADDED)
     target_include_directories(common PRIVATE ${lz4_SOURCE_DIR}/lib)

src/common/android/android_common.cpp

@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-FileCopyrightText: 2025 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #include "android_common.h"
@@ -51,7 +51,7 @@ jstring ToJString(JNIEnv* env, std::u16string_view str) {
 }
 
 double GetJDouble(JNIEnv* env, jobject jdouble) {
-    return env->CallDoubleMethod(jdouble, GetDoubleValueMethod());
+    return env->GetDoubleField(jdouble, GetDoubleValueField());
 }
 
 jobject ToJDouble(JNIEnv* env, double value) {
@@ -59,7 +59,7 @@ jobject ToJDouble(JNIEnv* env, double value) {
 }
 
 s32 GetJInteger(JNIEnv* env, jobject jinteger) {
-    return env->CallIntMethod(jinteger, GetIntegerValueMethod());
+    return env->GetIntField(jinteger, GetIntegerValueField());
 }
 
 jobject ToJInteger(JNIEnv* env, s32 value) {
@@ -67,7 +67,7 @@ jobject ToJInteger(JNIEnv* env, s32 value) {
 }
 
 bool GetJBoolean(JNIEnv* env, jobject jboolean) {
-    return env->CallBooleanMethod(jboolean, GetBooleanValueMethod());
+    return env->GetBooleanField(jboolean, GetBooleanValueField());
 }
 
 jobject ToJBoolean(JNIEnv* env, bool value) {

src/common/android/id_cache.cpp

@@ -63,15 +63,15 @@ static jfieldID s_patch_title_id_field;
 
 static jclass s_double_class;
 static jmethodID s_double_constructor;
-static jmethodID s_double_value_method;
+static jfieldID s_double_value_field;
 
 static jclass s_integer_class;
 static jmethodID s_integer_constructor;
-static jmethodID s_integer_value_method;
+static jfieldID s_integer_value_field;
 
 static jclass s_boolean_class;
 static jmethodID s_boolean_constructor;
-static jmethodID s_boolean_value_method;
+static jfieldID s_boolean_value_field;
 
 static jclass s_player_input_class;
 static jmethodID s_player_input_constructor;
@@ -103,6 +103,7 @@ static jmethodID s_clear_chat;
 static constexpr jint JNI_VERSION = JNI_VERSION_1_6;
 
 namespace Common::Android {
+
     JNIEnv *GetEnvForThread() {
         thread_local static struct OwnedEnv {
             OwnedEnv() {
@@ -298,8 +299,8 @@ namespace Common::Android {
         return s_double_constructor;
     }
 
-    jmethodID GetDoubleValueMethod() {
-        return s_double_value_method;
+    jfieldID GetDoubleValueField() {
+        return s_double_value_field;
     }
 
     jclass GetIntegerClass() {
@@ -310,8 +311,8 @@ namespace Common::Android {
         return s_integer_constructor;
     }
 
-    jmethodID GetIntegerValueMethod() {
-        return s_integer_value_method;
+    jfieldID GetIntegerValueField() {
+        return s_integer_value_field;
     }
 
     jclass GetBooleanClass() {
@@ -322,8 +323,8 @@ namespace Common::Android {
         return s_boolean_constructor;
     }
 
-    jmethodID GetBooleanValueMethod() {
-        return s_boolean_value_method;
+    jfieldID GetBooleanValueField() {
+        return s_boolean_value_field;
     }
 
     jclass GetPlayerInputClass() {
@@ -428,6 +429,188 @@ namespace Common::Android {
 
     jint InitFFmpegOnLoad(JavaVM *vm);
 
+    jint JNI_OnLoad(JavaVM *vm, void *reserved) {
+        s_java_vm = vm;
+        InitFFmpegOnLoad(vm);
+
+        JNIEnv *env;
+        if (vm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION) != JNI_OK)
+            return JNI_ERR;
+
+        // Initialize Java classes
+        const jclass native_library_class = env->FindClass("org/yuzu/yuzu_emu/NativeLibrary");
+        s_native_library_class = reinterpret_cast<jclass>(env->NewGlobalRef(native_library_class));
+        s_disk_cache_progress_class = reinterpret_cast<jclass>(env->NewGlobalRef(
+                env->FindClass("org/yuzu/yuzu_emu/disk_shader_cache/DiskShaderCacheProgress")));
+        s_load_callback_stage_class = reinterpret_cast<jclass>(env->NewGlobalRef(env->FindClass(
+                "org/yuzu/yuzu_emu/disk_shader_cache/DiskShaderCacheProgress$LoadCallbackStage")));
+
+        const jclass game_dir_class = env->FindClass("org/yuzu/yuzu_emu/model/GameDir");
+        s_game_dir_class = reinterpret_cast<jclass>(env->NewGlobalRef(game_dir_class));
+        s_game_dir_constructor = env->GetMethodID(game_dir_class, "<init>",
+                                                  "(Ljava/lang/String;Z)V");
+        env->DeleteLocalRef(game_dir_class);
+
+        // Initialize methods
+        s_exit_emulation_activity =
+                env->GetStaticMethodID(s_native_library_class, "exitEmulationActivity", "(I)V");
+        s_disk_cache_load_progress =
+                env->GetStaticMethodID(s_disk_cache_progress_class, "loadProgress", "(III)V");
+        s_copy_to_storage = env->GetStaticMethodID(s_native_library_class, "copyFileToStorage",
+                                                   "(Ljava/lang/String;Ljava/lang/String;)Z");
+        s_file_exists = env->GetStaticMethodID(s_native_library_class, "exists",
+                                               "(Ljava/lang/String;)Z");
+        s_file_extension = env->GetStaticMethodID(s_native_library_class, "getFileExtension",
+                                               "(Ljava/lang/String;)Ljava/lang/String;");
+        s_on_emulation_started =
+                env->GetStaticMethodID(s_native_library_class, "onEmulationStarted", "()V");
+        s_on_emulation_stopped =
+                env->GetStaticMethodID(s_native_library_class, "onEmulationStopped", "(I)V");
+        s_on_program_changed =
+                env->GetStaticMethodID(s_native_library_class, "onProgramChanged", "(I)V");
+
+        const jclass game_class = env->FindClass("org/yuzu/yuzu_emu/model/Game");
+        s_game_class = reinterpret_cast<jclass>(env->NewGlobalRef(game_class));
+        s_game_constructor = env->GetMethodID(game_class, "<init>",
+                                              "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/"
+                                              "String;Ljava/lang/String;Ljava/lang/String;Z)V");
+        s_game_title_field = env->GetFieldID(game_class, "title", "Ljava/lang/String;");
+        s_game_path_field = env->GetFieldID(game_class, "path", "Ljava/lang/String;");
+        s_game_program_id_field = env->GetFieldID(game_class, "programId", "Ljava/lang/String;");
+        s_game_developer_field = env->GetFieldID(game_class, "developer", "Ljava/lang/String;");
+        s_game_version_field = env->GetFieldID(game_class, "version", "Ljava/lang/String;");
+        s_game_is_homebrew_field = env->GetFieldID(game_class, "isHomebrew", "Z");
+        env->DeleteLocalRef(game_class);
+
+        const jclass string_class = env->FindClass("java/lang/String");
+        s_string_class = reinterpret_cast<jclass>(env->NewGlobalRef(string_class));
+        env->DeleteLocalRef(string_class);
+
+        const jclass pair_class = env->FindClass("kotlin/Pair");
+        s_pair_class = reinterpret_cast<jclass>(env->NewGlobalRef(pair_class));
+        s_pair_constructor =
+                env->GetMethodID(pair_class, "<init>", "(Ljava/lang/Object;Ljava/lang/Object;)V");
+        s_pair_first_field = env->GetFieldID(pair_class, "first", "Ljava/lang/Object;");
+        s_pair_second_field = env->GetFieldID(pair_class, "second", "Ljava/lang/Object;");
+        env->DeleteLocalRef(pair_class);
+
+        const jclass overlay_control_data_class =
+                env->FindClass("org/yuzu/yuzu_emu/overlay/model/OverlayControlData");
+        s_overlay_control_data_class =
+                reinterpret_cast<jclass>(env->NewGlobalRef(overlay_control_data_class));
+        s_overlay_control_data_constructor =
+                env->GetMethodID(overlay_control_data_class, "<init>",
+                                 "(Ljava/lang/String;ZLkotlin/Pair;Lkotlin/Pair;Lkotlin/Pair;F)V");
+        s_overlay_control_data_id_field =
+                env->GetFieldID(overlay_control_data_class, "id", "Ljava/lang/String;");
+        s_overlay_control_data_enabled_field =
+                env->GetFieldID(overlay_control_data_class, "enabled", "Z");
+        s_overlay_control_data_landscape_position_field =
+                env->GetFieldID(overlay_control_data_class, "landscapePosition", "Lkotlin/Pair;");
+        s_overlay_control_data_portrait_position_field =
+                env->GetFieldID(overlay_control_data_class, "portraitPosition", "Lkotlin/Pair;");
+        s_overlay_control_data_foldable_position_field =
+                env->GetFieldID(overlay_control_data_class, "foldablePosition", "Lkotlin/Pair;");
+        s_overlay_control_data_individual_scale_field =
+                env->GetFieldID(overlay_control_data_class, "individualScale", "F");
+        env->DeleteLocalRef(overlay_control_data_class);
+
+        const jclass patch_class = env->FindClass("org/yuzu/yuzu_emu/model/Patch");
+        s_patch_class = reinterpret_cast<jclass>(env->NewGlobalRef(patch_class));
+        s_patch_constructor = env->GetMethodID(
+                patch_class, "<init>",
+                "(ZLjava/lang/String;Ljava/lang/String;ILjava/lang/String;Ljava/lang/String;JI)V");
+        s_patch_enabled_field = env->GetFieldID(patch_class, "enabled", "Z");
+        s_patch_name_field = env->GetFieldID(patch_class, "name", "Ljava/lang/String;");
+        s_patch_version_field = env->GetFieldID(patch_class, "version", "Ljava/lang/String;");
+        s_patch_type_field = env->GetFieldID(patch_class, "type", "I");
+        s_patch_program_id_field = env->GetFieldID(patch_class, "programId", "Ljava/lang/String;");
+        s_patch_title_id_field = env->GetFieldID(patch_class, "titleId", "Ljava/lang/String;");
+        env->DeleteLocalRef(patch_class);
+
+        const jclass double_class = env->FindClass("java/lang/Double");
+        s_double_class = reinterpret_cast<jclass>(env->NewGlobalRef(double_class));
+        s_double_constructor = env->GetMethodID(double_class, "<init>", "(D)V");
+        s_double_value_field = env->GetFieldID(double_class, "value", "D");
+        env->DeleteLocalRef(double_class);
+
+        const jclass int_class = env->FindClass("java/lang/Integer");
+        s_integer_class = reinterpret_cast<jclass>(env->NewGlobalRef(int_class));
+        s_integer_constructor = env->GetMethodID(int_class, "<init>", "(I)V");
+        s_integer_value_field = env->GetFieldID(int_class, "value", "I");
+        env->DeleteLocalRef(int_class);
+
+        const jclass boolean_class = env->FindClass("java/lang/Boolean");
+        s_boolean_class = reinterpret_cast<jclass>(env->NewGlobalRef(boolean_class));
+        s_boolean_constructor = env->GetMethodID(boolean_class, "<init>", "(Z)V");
+        s_boolean_value_field = env->GetFieldID(boolean_class, "value", "Z");
+        env->DeleteLocalRef(boolean_class);
+
+        const jclass player_input_class =
+                env->FindClass("org/yuzu/yuzu_emu/features/input/model/PlayerInput");
+        s_player_input_class = reinterpret_cast<jclass>(env->NewGlobalRef(player_input_class));
+        s_player_input_constructor = env->GetMethodID(
+                player_input_class, "<init>",
+                "(Z[Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;ZIJJJJLjava/lang/String;Z)V");
+        s_player_input_connected_field = env->GetFieldID(player_input_class, "connected", "Z");
+        s_player_input_buttons_field =
+                env->GetFieldID(player_input_class, "buttons", "[Ljava/lang/String;");
+        s_player_input_analogs_field =
+                env->GetFieldID(player_input_class, "analogs", "[Ljava/lang/String;");
+        s_player_input_motions_field =
+                env->GetFieldID(player_input_class, "motions", "[Ljava/lang/String;");
+        s_player_input_vibration_enabled_field =
+                env->GetFieldID(player_input_class, "vibrationEnabled", "Z");
+        s_player_input_vibration_strength_field =
+                env->GetFieldID(player_input_class, "vibrationStrength", "I");
+        s_player_input_body_color_left_field =
+                env->GetFieldID(player_input_class, "bodyColorLeft", "J");
+        s_player_input_body_color_right_field =
+                env->GetFieldID(player_input_class, "bodyColorRight", "J");
+        s_player_input_button_color_left_field =
+                env->GetFieldID(player_input_class, "buttonColorLeft", "J");
+        s_player_input_button_color_right_field =
+                env->GetFieldID(player_input_class, "buttonColorRight", "J");
+        s_player_input_profile_name_field =
+                env->GetFieldID(player_input_class, "profileName", "Ljava/lang/String;");
+        s_player_input_use_system_vibrator_field =
+                env->GetFieldID(player_input_class, "useSystemVibrator", "Z");
+        env->DeleteLocalRef(player_input_class);
+
+        const jclass yuzu_input_device_interface =
+                env->FindClass("org/yuzu/yuzu_emu/features/input/YuzuInputDevice");
+        s_yuzu_input_device_interface =
+                reinterpret_cast<jclass>(env->NewGlobalRef(yuzu_input_device_interface));
+        s_yuzu_input_device_get_name =
+                env->GetMethodID(yuzu_input_device_interface, "getName", "()Ljava/lang/String;");
+        s_yuzu_input_device_get_guid =
+                env->GetMethodID(yuzu_input_device_interface, "getGUID", "()Ljava/lang/String;");
+        s_yuzu_input_device_get_port = env->GetMethodID(yuzu_input_device_interface, "getPort",
+                                                        "()I");
+        s_yuzu_input_device_get_supports_vibration =
+                env->GetMethodID(yuzu_input_device_interface, "getSupportsVibration", "()Z");
+        s_yuzu_input_device_vibrate = env->GetMethodID(yuzu_input_device_interface, "vibrate",
+                                                       "(F)V");
+        s_yuzu_input_device_get_axes =
+                env->GetMethodID(yuzu_input_device_interface, "getAxes", "()[Ljava/lang/Integer;");
+        s_yuzu_input_device_has_keys =
+                env->GetMethodID(yuzu_input_device_interface, "hasKeys", "([I)[Z");
+        env->DeleteLocalRef(yuzu_input_device_interface);
+        s_add_netplay_message = env->GetStaticMethodID(s_native_library_class, "addNetPlayMessage",
+                                                       "(ILjava/lang/String;)V");
+        s_clear_chat = env->GetStaticMethodID(s_native_library_class, "clearChat", "()V");
+
+
+        // Initialize Android Storage
+        Common::FS::Android::RegisterCallbacks(env, s_native_library_class);
+
+        // Initialize applets
+        Common::Android::SoftwareKeyboard::InitJNI(env);
+        Common::Android::WebBrowser::InitJNI(env);
+
+        return JNI_VERSION;
+    }
+
     void JNI_OnUnload(JavaVM *vm, void *reserved) {
         JNIEnv *env;
         if (vm->GetEnv(reinterpret_cast<void **>(&env), JNI_VERSION) != JNI_OK) {
@@ -462,183 +645,4 @@ namespace Common::Android {
     }
 #endif
 
-void Initialize(JavaVM* vm, JNIEnv *env) {
-    s_java_vm = vm;
-    InitFFmpegOnLoad(vm);
-
-    if (env->ExceptionCheck()) {
-        env->ExceptionClear();
-    }
-
-    // Initialize Java classes
-    const jclass native_library_class = env->FindClass("org/yuzu/yuzu_emu/NativeLibrary");
-    s_native_library_class = reinterpret_cast<jclass>(env->NewGlobalRef(native_library_class));
-    s_disk_cache_progress_class = reinterpret_cast<jclass>(env->NewGlobalRef(
-        env->FindClass("org/yuzu/yuzu_emu/disk_shader_cache/DiskShaderCacheProgress")));
-    s_load_callback_stage_class = reinterpret_cast<jclass>(env->NewGlobalRef(env->FindClass(
-        "org/yuzu/yuzu_emu/disk_shader_cache/DiskShaderCacheProgress$LoadCallbackStage")));
-
-    const jclass game_dir_class = env->FindClass("org/yuzu/yuzu_emu/model/GameDir");
-    s_game_dir_class = reinterpret_cast<jclass>(env->NewGlobalRef(game_dir_class));
-    s_game_dir_constructor = env->GetMethodID(game_dir_class, "<init>",
-                                              "(Ljava/lang/String;Z)V");
-    env->DeleteLocalRef(game_dir_class);
-
-    // Initialize methods
-    s_exit_emulation_activity =
-        env->GetStaticMethodID(s_native_library_class, "exitEmulationActivity", "(I)V");
-    s_disk_cache_load_progress =
-        env->GetStaticMethodID(s_disk_cache_progress_class, "loadProgress", "(III)V");
-    s_copy_to_storage = env->GetStaticMethodID(s_native_library_class, "copyFileToStorage",
-                                               "(Ljava/lang/String;Ljava/lang/String;)Z");
-    s_file_exists = env->GetStaticMethodID(s_native_library_class, "exists",
-                                           "(Ljava/lang/String;)Z");
-    s_file_extension = env->GetStaticMethodID(s_native_library_class, "getFileExtension",
-                                              "(Ljava/lang/String;)Ljava/lang/String;");
-    s_on_emulation_started =
-        env->GetStaticMethodID(s_native_library_class, "onEmulationStarted", "()V");
-    s_on_emulation_stopped =
-        env->GetStaticMethodID(s_native_library_class, "onEmulationStopped", "(I)V");
-    s_on_program_changed =
-        env->GetStaticMethodID(s_native_library_class, "onProgramChanged", "(I)V");
-
-    const jclass game_class = env->FindClass("org/yuzu/yuzu_emu/model/Game");
-    s_game_class = reinterpret_cast<jclass>(env->NewGlobalRef(game_class));
-    s_game_constructor = env->GetMethodID(game_class, "<init>",
-                                          "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/"
-                                          "String;Ljava/lang/String;Ljava/lang/String;Z)V");
-    s_game_title_field = env->GetFieldID(game_class, "title", "Ljava/lang/String;");
-    s_game_path_field = env->GetFieldID(game_class, "path", "Ljava/lang/String;");
-    s_game_program_id_field = env->GetFieldID(game_class, "programId", "Ljava/lang/String;");
-    s_game_developer_field = env->GetFieldID(game_class, "developer", "Ljava/lang/String;");
-    s_game_version_field = env->GetFieldID(game_class, "version", "Ljava/lang/String;");
-    s_game_is_homebrew_field = env->GetFieldID(game_class, "isHomebrew", "Z");
-    env->DeleteLocalRef(game_class);
-
-    const jclass string_class = env->FindClass("java/lang/String");
-    s_string_class = reinterpret_cast<jclass>(env->NewGlobalRef(string_class));
-    env->DeleteLocalRef(string_class);
-
-    const jclass pair_class = env->FindClass("kotlin/Pair");
-    s_pair_class = reinterpret_cast<jclass>(env->NewGlobalRef(pair_class));
-    s_pair_constructor =
-        env->GetMethodID(pair_class, "<init>", "(Ljava/lang/Object;Ljava/lang/Object;)V");
-    s_pair_first_field = env->GetFieldID(pair_class, "first", "Ljava/lang/Object;");
-    s_pair_second_field = env->GetFieldID(pair_class, "second", "Ljava/lang/Object;");
-    env->DeleteLocalRef(pair_class);
-
-    const jclass overlay_control_data_class =
-        env->FindClass("org/yuzu/yuzu_emu/overlay/model/OverlayControlData");
-    s_overlay_control_data_class =
-        reinterpret_cast<jclass>(env->NewGlobalRef(overlay_control_data_class));
-    s_overlay_control_data_constructor =
-        env->GetMethodID(overlay_control_data_class, "<init>",
-                         "(Ljava/lang/String;ZLkotlin/Pair;Lkotlin/Pair;Lkotlin/Pair;F)V");
-    s_overlay_control_data_id_field =
-        env->GetFieldID(overlay_control_data_class, "id", "Ljava/lang/String;");
-    s_overlay_control_data_enabled_field =
-        env->GetFieldID(overlay_control_data_class, "enabled", "Z");
-    s_overlay_control_data_landscape_position_field =
-        env->GetFieldID(overlay_control_data_class, "landscapePosition", "Lkotlin/Pair;");
-    s_overlay_control_data_portrait_position_field =
-        env->GetFieldID(overlay_control_data_class, "portraitPosition", "Lkotlin/Pair;");
-    s_overlay_control_data_foldable_position_field =
-        env->GetFieldID(overlay_control_data_class, "foldablePosition", "Lkotlin/Pair;");
-    s_overlay_control_data_individual_scale_field =
-        env->GetFieldID(overlay_control_data_class, "individualScale", "F");
-    env->DeleteLocalRef(overlay_control_data_class);
-
-    const jclass patch_class = env->FindClass("org/yuzu/yuzu_emu/model/Patch");
-    s_patch_class = reinterpret_cast<jclass>(env->NewGlobalRef(patch_class));
-    s_patch_constructor = env->GetMethodID(
-        patch_class, "<init>",
-        "(ZLjava/lang/String;Ljava/lang/String;ILjava/lang/String;Ljava/lang/String;JI)V");
-    s_patch_enabled_field = env->GetFieldID(patch_class, "enabled", "Z");
-    s_patch_name_field = env->GetFieldID(patch_class, "name", "Ljava/lang/String;");
-    s_patch_version_field = env->GetFieldID(patch_class, "version", "Ljava/lang/String;");
-    s_patch_type_field = env->GetFieldID(patch_class, "type", "I");
-    s_patch_program_id_field = env->GetFieldID(patch_class, "programId", "Ljava/lang/String;");
-    s_patch_title_id_field = env->GetFieldID(patch_class, "titleId", "Ljava/lang/String;");
-    env->DeleteLocalRef(patch_class);
-
-    const jclass double_class = env->FindClass("java/lang/Double");
-    s_double_class = reinterpret_cast<jclass>(env->NewGlobalRef(double_class));
-    s_double_constructor = env->GetMethodID(double_class, "<init>", "(D)V");
-    s_double_value_method = env->GetMethodID(double_class, "doubleValue", "()D");
-    env->DeleteLocalRef(double_class);
-
-    const jclass int_class = env->FindClass("java/lang/Integer");
-    s_integer_class = reinterpret_cast<jclass>(env->NewGlobalRef(int_class));
-    s_integer_constructor = env->GetMethodID(int_class, "<init>", "(I)V");
-    s_integer_value_method = env->GetMethodID(int_class, "intValue", "()I");
-    env->DeleteLocalRef(int_class);
-
-    const jclass boolean_class = env->FindClass("java/lang/Boolean");
-    s_boolean_class = reinterpret_cast<jclass>(env->NewGlobalRef(boolean_class));
-    s_boolean_constructor = env->GetMethodID(boolean_class, "<init>", "(Z)V");
-    s_boolean_value_method = env->GetMethodID(boolean_class, "booleanValue", "()Z");
-    env->DeleteLocalRef(boolean_class);
-
-    const jclass player_input_class =
-        env->FindClass("org/yuzu/yuzu_emu/features/input/model/PlayerInput");
-    s_player_input_class = reinterpret_cast<jclass>(env->NewGlobalRef(player_input_class));
-    s_player_input_constructor = env->GetMethodID(
-        player_input_class, "<init>",
-        "(Z[Ljava/lang/String;[Ljava/lang/String;[Ljava/lang/String;ZIJJJJLjava/lang/String;Z)V");
-    s_player_input_connected_field = env->GetFieldID(player_input_class, "connected", "Z");
-    s_player_input_buttons_field =
-        env->GetFieldID(player_input_class, "buttons", "[Ljava/lang/String;");
-    s_player_input_analogs_field =
-        env->GetFieldID(player_input_class, "analogs", "[Ljava/lang/String;");
-    s_player_input_motions_field =
-        env->GetFieldID(player_input_class, "motions", "[Ljava/lang/String;");
-    s_player_input_vibration_enabled_field =
-        env->GetFieldID(player_input_class, "vibrationEnabled", "Z");
-    s_player_input_vibration_strength_field =
-        env->GetFieldID(player_input_class, "vibrationStrength", "I");
-    s_player_input_body_color_left_field =
-        env->GetFieldID(player_input_class, "bodyColorLeft", "J");
-    s_player_input_body_color_right_field =
-        env->GetFieldID(player_input_class, "bodyColorRight", "J");
-    s_player_input_button_color_left_field =
-        env->GetFieldID(player_input_class, "buttonColorLeft", "J");
-    s_player_input_button_color_right_field =
-        env->GetFieldID(player_input_class, "buttonColorRight", "J");
-    s_player_input_profile_name_field =
-        env->GetFieldID(player_input_class, "profileName", "Ljava/lang/String;");
-    s_player_input_use_system_vibrator_field =
-        env->GetFieldID(player_input_class, "useSystemVibrator", "Z");
-    env->DeleteLocalRef(player_input_class);
-
-    const jclass yuzu_input_device_interface =
-        env->FindClass("org/yuzu/yuzu_emu/features/input/YuzuInputDevice");
-    s_yuzu_input_device_interface =
-        reinterpret_cast<jclass>(env->NewGlobalRef(yuzu_input_device_interface));
-    s_yuzu_input_device_get_name =
-        env->GetMethodID(yuzu_input_device_interface, "getName", "()Ljava/lang/String;");
-    s_yuzu_input_device_get_guid =
-        env->GetMethodID(yuzu_input_device_interface, "getGUID", "()Ljava/lang/String;");
-    s_yuzu_input_device_get_port = env->GetMethodID(yuzu_input_device_interface, "getPort",
-                                                    "()I");
-    s_yuzu_input_device_get_supports_vibration =
-        env->GetMethodID(yuzu_input_device_interface, "getSupportsVibration", "()Z");
-    s_yuzu_input_device_vibrate = env->GetMethodID(yuzu_input_device_interface, "vibrate",
-                                                   "(F)V");
-    s_yuzu_input_device_get_axes =
-        env->GetMethodID(yuzu_input_device_interface, "getAxes", "()[Ljava/lang/Integer;");
-    s_yuzu_input_device_has_keys =
-        env->GetMethodID(yuzu_input_device_interface, "hasKeys", "([I)[Z");
-    env->DeleteLocalRef(yuzu_input_device_interface);
-    s_add_netplay_message = env->GetStaticMethodID(s_native_library_class, "addNetPlayMessage",
-                                                   "(ILjava/lang/String;)V");
-    s_clear_chat = env->GetStaticMethodID(s_native_library_class, "clearChat", "()V");
-
-    // Initialize Android Storage
-    Common::FS::Android::RegisterCallbacks(env, s_native_library_class);
-
-    // Initialize applets
-    Common::Android::SoftwareKeyboard::InitJNI(env);
-    Common::Android::WebBrowser::InitJNI(env);
-}
-
 } // namespace Common::Android

src/common/android/id_cache.h

@@ -11,7 +11,6 @@
 
 namespace Common::Android {
 
-void Initialize(JavaVM* vm, JNIEnv *env);
 JNIEnv* GetEnvForThread();
 
 /**
@@ -81,15 +80,15 @@ jfieldID GetPatchTitleIdField();
 
 jclass GetDoubleClass();
 jmethodID GetDoubleConstructor();
-jmethodID GetDoubleValueMethod();
+jfieldID GetDoubleValueField();
 
 jclass GetIntegerClass();
 jmethodID GetIntegerConstructor();
-jmethodID GetIntegerValueMethod();
+jfieldID GetIntegerValueField();
 
 jclass GetBooleanClass();
 jmethodID GetBooleanConstructor();
-jmethodID GetBooleanValueMethod();
+jfieldID GetBooleanValueField();
 
 jclass GetPlayerInputClass();
 jmethodID GetPlayerInputConstructor();

src/common/fiber.cpp

@@ -11,7 +11,12 @@
 #include "common/fiber.h"
 #include "common/virtual_buffer.h"
 
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#include <emscripten/fiber.h>
+#else
 #include <boost/context/detail/fcontext.hpp>
+#endif
 
 namespace Common {
 
@@ -22,36 +27,103 @@ constexpr size_t DEFAULT_STACK_SIZE = 512 * 4096;
 #endif
 constexpr u32 CANARY_VALUE = 0xDEADBEEF;
 
+#ifdef __EMSCRIPTEN__
 struct Fiber::FiberImpl {
     FiberImpl() {}
 
     u32 canary_1 = CANARY_VALUE;
     std::array<u8, DEFAULT_STACK_SIZE> stack{};
-    std::array<u8, DEFAULT_STACK_SIZE> rewind_stack{};
+    std::array<u8, DEFAULT_STACK_SIZE> astack{};
     u32 canary_2 = CANARY_VALUE;
 
-    boost::context::detail::fcontext_t context{};
-    boost::context::detail::fcontext_t rewind_context{};
+    emscripten_fiber_t* context{nullptr};
 
     std::mutex guard;
     std::function<void()> entry_point;
-    std::function<void()> rewind_point;
     std::shared_ptr<Fiber> previous_fiber;
-
-    u8* stack_limit = nullptr;
-    u8* rewind_stack_limit = nullptr;
     bool is_thread_fiber = false;
     bool released = false;
 };
 
-void Fiber::SetRewindPoint(std::function<void()>&& rewind_func) {
-    impl->rewind_point = std::move(rewind_func);
+Fiber::Fiber(std::function<void()>&& entry_point_func) : impl{std::make_unique<FiberImpl>()} {
+    impl->entry_point = std::move(entry_point_func);
+    emscripten_fiber_init(impl->context, [](void *user_data) -> void {
+        auto* fiber = static_cast<Fiber*>(user_data);
+        ASSERT(fiber && fiber->impl && fiber->impl->previous_fiber && fiber->impl->previous_fiber->impl);
+        ASSERT(fiber->impl->canary_1 == CANARY_VALUE);
+        ASSERT(fiber->impl->canary_2 == CANARY_VALUE);
+        fiber->impl->previous_fiber->impl->context = fiber->impl->context;
+        fiber->impl->previous_fiber->impl->guard.unlock();
+        fiber->impl->previous_fiber.reset();
+        fiber->impl->entry_point();
+        UNREACHABLE();
+    }, impl.get(), impl->stack.data(), impl->stack.size(), impl->astack.data(), impl->astack.size());
 }
 
+Fiber::Fiber() : impl{std::make_unique<FiberImpl>()} {}
+
+Fiber::~Fiber() {
+    if (!impl->released) {
+        // Make sure the Fiber is not being used
+        const bool locked = impl->guard.try_lock();
+        ASSERT(locked && "Destroying a fiber that's still running");
+        if (locked) {
+            impl->guard.unlock();
+        }
+    }
+}
+
+void Fiber::Exit() {
+    ASSERT(impl->is_thread_fiber && "Exiting non main thread fiber");
+    if (impl->is_thread_fiber) {
+        impl->guard.unlock();
+        impl->released = true;
+    }
+}
+
+void Fiber::YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to) {
+    to.impl->guard.lock();
+    to.impl->previous_fiber = weak_from.lock();
+    emscripten_fiber_swap(to.impl->context, to.impl->previous_fiber->impl->context);
+    // "from" might no longer be valid if the thread was killed
+    if (auto from = weak_from.lock()) {
+        if (from->impl->previous_fiber == nullptr) {
+            ASSERT(false && "previous_fiber is nullptr!");
+        } else {
+            from->impl->previous_fiber->impl->guard.unlock();
+            from->impl->previous_fiber.reset();
+        }
+    }
+}
+
+std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
+    std::shared_ptr<Fiber> fiber = std::shared_ptr<Fiber>{new Fiber()};
+    fiber->impl->guard.lock();
+    fiber->impl->is_thread_fiber = true;
+    return fiber;
+}
+#else
+struct Fiber::FiberImpl {
+    FiberImpl() {}
+
+    u32 canary_1 = CANARY_VALUE;
+    std::array<u8, DEFAULT_STACK_SIZE> stack{};
+    u32 canary_2 = CANARY_VALUE;
+
+    boost::context::detail::fcontext_t context{};
+
+    std::mutex guard;
+    std::function<void()> entry_point;
+    std::shared_ptr<Fiber> previous_fiber;
+
+    u8* stack_limit = nullptr;
+    bool is_thread_fiber = false;
+    bool released = false;
+};
+
 Fiber::Fiber(std::function<void()>&& entry_point_func) : impl{std::make_unique<FiberImpl>()} {
     impl->entry_point = std::move(entry_point_func);
     impl->stack_limit = impl->stack.data();
-    impl->rewind_stack_limit = impl->rewind_stack.data();
     u8* stack_base = impl->stack_limit + DEFAULT_STACK_SIZE;
     impl->context = boost::context::detail::make_fcontext(stack_base, impl->stack.size(), [](boost::context::detail::transfer_t transfer) -> void {
         auto* fiber = static_cast<Fiber*>(transfer.data);
@@ -72,7 +144,7 @@ Fiber::~Fiber() {
     if (!impl->released) {
         // Make sure the Fiber is not being used
         const bool locked = impl->guard.try_lock();
-        ASSERT_MSG(locked, "Destroying a fiber that's still running");
+        ASSERT(locked && "Destroying a fiber that's still running");
         if (locked) {
             impl->guard.unlock();
         }
@@ -80,7 +152,7 @@ Fiber::~Fiber() {
 }
 
 void Fiber::Exit() {
-    ASSERT_MSG(impl->is_thread_fiber, "Exiting non main thread fiber");
+    ASSERT(impl->is_thread_fiber && "Exiting non main thread fiber");
     if (impl->is_thread_fiber) {
         impl->guard.unlock();
         impl->released = true;
@@ -110,5 +182,6 @@ std::shared_ptr<Fiber> Fiber::ThreadToFiber() {
     fiber->impl->is_thread_fiber = true;
     return fiber;
 }
+#endif
 
 } // namespace Common

src/common/fiber.h

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
@@ -45,7 +45,6 @@ public:
     /// Fiber 'from' must be the currently running fiber.
     static void YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to);
     [[nodiscard]] static std::shared_ptr<Fiber> ThreadToFiber();
-    void SetRewindPoint(std::function<void()>&& rewind_func);
     /// Only call from main thread's fiber
     void Exit();
 private:

src/common/fs/file.cpp

@@ -7,25 +7,18 @@
 #include <vector>
 
 #include "common/assert.h"
-#include "common/bit_util.h"
 #include "common/fs/file.h"
 #include "common/fs/fs.h"
-#include "common/fs/fs_types.h"
 #ifdef __ANDROID__
 #include "common/fs/fs_android.h"
 #endif
 #include "common/logging.h"
-#include "common/literals.h"
 
 #ifdef _WIN32
 #include <io.h>
 #include <share.h>
-#include <windows.h>
 #else
 #include <unistd.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <fcntl.h>
 #endif
 
 #ifdef _MSC_VER
@@ -43,13 +36,13 @@ namespace {
 #ifdef _WIN32
 
 /**
-* Converts the file access mode and file type enums to a file access mode wide string.
-*
-* @param mode File access mode
-* @param type File type
-*
-* @returns A pointer to a wide string representing the file access mode.
-*/
+ * Converts the file access mode and file type enums to a file access mode wide string.
+ *
+ * @param mode File access mode
+ * @param type File type
+ *
+ * @returns A pointer to a wide string representing the file access mode.
+ */
 [[nodiscard]] constexpr const wchar_t* AccessModeToWStr(FileAccessMode mode, FileType type) {
     switch (type) {
     case FileType::BinaryFile:
@@ -86,12 +79,12 @@ namespace {
 }
 
 /**
-* Converts the file-share access flag enum to a Windows defined file-share access flag.
-*
-* @param flag File-share access flag
-*
-* @returns Windows defined file-share access flag.
-*/
+ * Converts the file-share access flag enum to a Windows defined file-share access flag.
+ *
+ * @param flag File-share access flag
+ *
+ * @returns Windows defined file-share access flag.
+ */
 [[nodiscard]] constexpr int ToWindowsFileShareFlag(FileShareFlag flag) {
     switch (flag) {
     case FileShareFlag::ShareNone:
@@ -109,13 +102,13 @@ namespace {
 #else
 
 /**
-* Converts the file access mode and file type enums to a file access mode string.
-*
-* @param mode File access mode
-* @param type File type
-*
-* @returns A pointer to a string representing the file access mode.
-*/
+ * Converts the file access mode and file type enums to a file access mode string.
+ *
+ * @param mode File access mode
+ * @param type File type
+ *
+ * @returns A pointer to a string representing the file access mode.
+ */
 [[nodiscard]] constexpr const char* AccessModeToStr(FileAccessMode mode, FileType type) {
     switch (type) {
     case FileType::BinaryFile:
@@ -154,12 +147,12 @@ namespace {
 #endif
 
 /**
-* Converts the seek origin enum to a seek origin integer.
-*
-* @param origin Seek origin
-*
-* @returns Seek origin integer.
-*/
+ * Converts the seek origin enum to a seek origin integer.
+ *
+ * @param origin Seek origin
+ *
+ * @returns Seek origin integer.
+ */
 [[nodiscard]] constexpr int ToSeekOrigin(SeekOrigin origin) {
     switch (origin) {
     case SeekOrigin::SetOrigin:
@@ -185,7 +178,7 @@ std::string ReadStringFromFile(const std::filesystem::path& path, FileType type)
 }
 
 size_t WriteStringToFile(const std::filesystem::path& path, FileType type,
-                        std::string_view string) {
+                         std::string_view string) {
     if (Exists(path) && !IsFile(path)) {
         return 0;
     }
@@ -196,7 +189,7 @@ size_t WriteStringToFile(const std::filesystem::path& path, FileType type,
 }
 
 size_t AppendStringToFile(const std::filesystem::path& path, FileType type,
-                        std::string_view string) {
+                          std::string_view string) {
     if (Exists(path) && !IsFile(path)) {
         return 0;
     }
@@ -251,189 +244,69 @@ FileType IOFile::GetType() const {
     return file_type;
 }
 
-#if defined(__unix__)
-static int PlatformMapReadOnly(IOFile& io, const char* path) {
-    io.mmap_fd = open(path, O_RDONLY);
-    if (io.mmap_fd > 0) {
-        struct stat st;
-        fstat(io.mmap_fd, &st);
-        io.mmap_size = st.st_size;
-
-        int map_flags = MAP_PRIVATE;
-#ifdef MAP_PREFAULT_READ
-        // Prefaults reads so the final resulting pagetable from this big stupid mmap()
-        // isn't comically lazily loaded, we just coalesce everything in-place for our
-        // lovely mmap flags; if we didn't prefault the reads the page table will be
-        // constructed in-place (i.e on a read-by-read basis) causing lovely soft-faults
-        // which would nuke any performance gains.
-        //
-        // This of course incurs a cost in the initial mmap(2) call, but that is fine.
-        map_flags |= MAP_PREFAULT_READ;
-#endif
-#ifdef MAP_NOSYNC
-        // This causes physical media to not be synched to our file/memory
-        // This means that if the read-only file is written to, we won't see changes
-        // or we may see changes which are just funnily scattered, in any case
-        // this presumes the files won't be changed during execution
-        //
-        // Do not ever use this on write files (if we ever support that); this will create
-        // a fun amount of fragmentation on the disk.
-        map_flags |= MAP_NOSYNC;
-#endif
-#if defined(NDEBUG) && defined(MAP_NOCORE)
-        map_flags |= MAP_NOCORE;
-#endif
-#ifdef MAP_HUGE_2MB
-        map_flags |= MAP_HUGE_2MB; //2mb pages
-#elif defined(MAP_ALIGNED)
-        // File must be big enough that it's worth to super align. We can't just super-align every
-        // file otherwise we will run out of alignments for actually important files :)
-        // System doesn't guarantee a super alignment, but if it's available it will delete
-        // about 3 layers(?) of the TLB tree for each read/write.
-        // Again the cost of faults may make this negligible gains, but hey, we gotta work
-        // what we gotta work with.
-        map_flags |= MAP_ALIGNED(21); //2^21 = 2mb use 2MB pages
-#endif
-        io.mmap_base = (u8*)mmap(nullptr, io.mmap_size, PROT_READ, map_flags, io.mmap_fd, 0);
-        if (io.mmap_base == MAP_FAILED) {
-            close(io.mmap_fd);
-            io.mmap_fd = -1;
-        } else {
-            using namespace Common::Literals;
-            // For small files it is acceptable to use a full readahead
-            // See https://github.com/torvalds/linux/blob/e80d033851b3bc94c3d254ac66660ddd0a49d72c/include/linux/pagemap.h#L1392
-            if (u64(st.st_size) >= 256_MiB) {
-                posix_madvise(io.mmap_base, io.mmap_size, POSIX_MADV_RANDOM);
-            } else {
-                posix_madvise(io.mmap_base, io.mmap_size, POSIX_MADV_SEQUENTIAL);
-            }
-        }
-    }
-    return io.mmap_fd;
-}
-static void PlatformUnmap(IOFile& io) {
-    if (io.mmap_fd != -1) {
-        munmap(io.mmap_base, io.mmap_size);
-        close(io.mmap_fd);
-        io.mmap_fd = -1;
-    }
-}
-#elif defined(__APPLE__)
-// NO IMPLEMENTATION YET
-#else
-static int PlatformMapReadOnly(IOFile& io, const wchar_t* path) {
-    io.file_handle = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN, nullptr);
-    if (HANDLE(io.file_handle) != INVALID_HANDLE_VALUE) {
-        io.mapping_handle = CreateFileMappingW(HANDLE(io.file_handle), nullptr, PAGE_READONLY, 0, 0, nullptr);
-        if (io.mapping_handle) {
-            io.mmap_base = (u8*)MapViewOfFile(HANDLE(io.mapping_handle), FILE_MAP_READ, 0, 0, 0);
-            if (io.mmap_base) {
-                _LARGE_INTEGER pvalue;
-                GetFileSizeEx(io.file_handle, &pvalue);
-                io.mmap_size = uint32_t(pvalue.QuadPart);
-            } else {
-                CloseHandle(io.mapping_handle);
-                CloseHandle(io.file_handle);
-                return -1;
-            }
-        } else {
-            CloseHandle(io.file_handle);
-            return -1;
-        }
-    }
-    return 0;
-}
-static void PlatformUnmap(IOFile& io) {
-    if(io.mapping_handle) {
-        if(io.mmap_base)
-            UnmapViewOfFile(HANDLE(io.mmap_base));
-        CloseHandle(HANDLE(io.mapping_handle));
-    }
-    if(io.file_handle != INVALID_HANDLE_VALUE)
-        CloseHandle(HANDLE(io.file_handle));
-}
-#endif
-
 void IOFile::Open(const fs::path& path, FileAccessMode mode, FileType type, FileShareFlag flag) {
     Close();
+
     file_path = path;
     file_access_mode = mode;
     file_type = type;
+
     errno = 0;
+
 #ifdef _WIN32
-    // TODO: this probably can use better logic but oh well I'm not a windowser
-    file_handle = nullptr;
-    if (type == FileType::BinaryFile && mode == FileAccessMode::Read) {
-        if (PlatformMapReadOnly(*this, path.c_str()) == -1) {
-            LOG_ERROR(Common_Filesystem, "Error mmap'ing file"); //: {}", path.c_str());
-        }
-    }
-    if (file_handle == nullptr) {
-        if (flag != FileShareFlag::ShareNone) {
-            file = _wfsopen(path.c_str(), AccessModeToWStr(mode, type), ToWindowsFileShareFlag(flag));
-        } else {
-            _wfopen_s(&file, path.c_str(), AccessModeToWStr(mode, type));
-        }
+    if (flag != FileShareFlag::ShareNone) {
+        file = _wfsopen(path.c_str(), AccessModeToWStr(mode, type), ToWindowsFileShareFlag(flag));
+    } else {
+        _wfopen_s(&file, path.c_str(), AccessModeToWStr(mode, type));
     }
 #elif __ANDROID__
     if (Android::IsContentUri(path)) {
         ASSERT_MSG(mode == FileAccessMode::Read, "Content URI file access is for read-only!");
-        if (PlatformMapReadOnly(*this, path.c_str()) == -1) {
-            LOG_ERROR(Common_Filesystem, "Error mmap'ing file: {}", path.c_str());
-            int const fd = Android::OpenContentUri(path, Android::OpenMode::Read);
-            if (fd != -1) {
-                file = fdopen(fd, "r");
-                if (errno != 0 && file == nullptr)
-                    LOG_ERROR(Common_Filesystem, "Error opening file: {}, error: {}", path.c_str(), strerror(errno));
-            } else {
-                LOG_ERROR(Common_Filesystem, "Error opening file: {}", path.c_str());
+        const auto fd = Android::OpenContentUri(path, Android::OpenMode::Read);
+        if (fd != -1) {
+            file = fdopen(fd, "r");
+            const auto error_num = errno;
+            if (error_num != 0 && file == nullptr) {
+                LOG_ERROR(Common_Filesystem, "Error opening file: {}, error: {}", path.c_str(),
+                          strerror(error_num));
             }
+        } else {
+            LOG_ERROR(Common_Filesystem, "Error opening file: {}", path.c_str());
         }
     } else {
         file = std::fopen(path.c_str(), AccessModeToStr(mode, type));
     }
-#elif defined(__HAIKU__) || defined(__managarm__) || defined(__OPENORBIS__) || defined(__APPLE__)
-    file = std::fopen(path.c_str(), AccessModeToStr(mode, type));
-#elif defined(__unix__)
-    if (type == FileType::BinaryFile && mode == FileAccessMode::Read) {
-        if (PlatformMapReadOnly(*this, path.c_str()) == -1) {
-            LOG_ERROR(Common_Filesystem, "Error mmap'ing file: {}", path.c_str());
-        }
-    }
-    if (mmap_fd == -1) {
-        file = std::fopen(path.c_str(), AccessModeToStr(mode, type)); // mmap(2) failed or simply we can't use it
-    }
 #else
-    // Some other fancy OS (ahem fucking Darwin/Mac OSX)
     file = std::fopen(path.c_str(), AccessModeToStr(mode, type));
 #endif
+
     if (!IsOpen()) {
         const auto ec = std::error_code{errno, std::generic_category()};
         LOG_ERROR(Common_Filesystem, "Failed to open the file at path={}, ec_message={}",
-            PathToUTF8String(file_path), ec.message());
+                  PathToUTF8String(file_path), ec.message());
     }
 }
 
 void IOFile::Close() {
-#if defined(__APPLE__)
-    // NO IMPLEMENTATION YET
-#else
-    PlatformUnmap(*this);
-#endif
-    if (file) {
-        errno = 0;
-        const auto close_result = std::fclose(file) == 0;
-        if (!close_result) {
-            const auto ec = std::error_code{errno, std::generic_category()};
-            LOG_ERROR(Common_Filesystem, "Failed to close the file at path={}, ec_message={}",
-                PathToUTF8String(file_path), ec.message());
-        }
-        file = nullptr;
+    if (!IsOpen()) {
+        return;
     }
+
+    errno = 0;
+
+    const auto close_result = std::fclose(file) == 0;
+
+    if (!close_result) {
+        const auto ec = std::error_code{errno, std::generic_category()};
+        LOG_ERROR(Common_Filesystem, "Failed to close the file at path={}, ec_message={}",
+                  PathToUTF8String(file_path), ec.message());
+    }
+
+    file = nullptr;
 }
 
 bool IOFile::IsOpen() const {
-    return file != nullptr || IsMappedFile();
+    return file != nullptr;
 }
 
 std::string IOFile::ReadString(size_t length) const {
@@ -450,132 +323,137 @@ size_t IOFile::WriteString(std::span<const char> string) const {
 }
 
 bool IOFile::Flush() const {
-    ASSERT(!IsMappedFile());
-    if (file) {
-        errno = 0;
-        auto const flush_result = std::fflush(file) == 0;
-        if (!flush_result) {
-            const auto ec = std::error_code{errno, std::generic_category()};
-            LOG_ERROR(Common_Filesystem, "Failed to flush the file at path={}, ec_message={}",
-                PathToUTF8String(file_path), ec.message());
-        }
-        return flush_result;
+    if (!IsOpen()) {
+        return false;
     }
-    return false;
+
+    errno = 0;
+
+#ifdef _WIN32
+    const auto flush_result = std::fflush(file) == 0;
+#else
+    const auto flush_result = std::fflush(file) == 0;
+#endif
+
+    if (!flush_result) {
+        const auto ec = std::error_code{errno, std::generic_category()};
+        LOG_ERROR(Common_Filesystem, "Failed to flush the file at path={}, ec_message={}",
+                  PathToUTF8String(file_path), ec.message());
+    }
+
+    return flush_result;
 }
 
 bool IOFile::Commit() const {
-    ASSERT(!IsMappedFile());
-    if (file) {
-        errno = 0;
-#ifdef _WIN32
-        const auto commit_result = std::fflush(file) == 0 && _commit(fileno(file)) == 0;
-#else
-        const auto commit_result = std::fflush(file) == 0 && fsync(fileno(file)) == 0;
-#endif
-        if (!commit_result) {
-            const auto ec = std::error_code{errno, std::generic_category()};
-            LOG_ERROR(Common_Filesystem, "Failed to commit the file at path={}, ec_message={}",
-                PathToUTF8String(file_path), ec.message());
-        }
-        return commit_result;
+    if (!IsOpen()) {
+        return false;
     }
-    return false;
+
+    errno = 0;
+
+#ifdef _WIN32
+    const auto commit_result = std::fflush(file) == 0 && _commit(fileno(file)) == 0;
+#else
+    const auto commit_result = std::fflush(file) == 0 && fsync(fileno(file)) == 0;
+#endif
+
+    if (!commit_result) {
+        const auto ec = std::error_code{errno, std::generic_category()};
+        LOG_ERROR(Common_Filesystem, "Failed to commit the file at path={}, ec_message={}",
+                  PathToUTF8String(file_path), ec.message());
+    }
+
+    return commit_result;
 }
 
 bool IOFile::SetSize(u64 size) const {
-    ASSERT(!IsMappedFile());
-    if (file) {
-        errno = 0;
-#ifdef _WIN32
-        const auto set_size_result = _chsize_s(fileno(file), s64(size)) == 0;
-#else
-        const auto set_size_result = ftruncate(fileno(file), s64(size)) == 0;
-#endif
-        if (!set_size_result) {
-            const auto ec = std::error_code{errno, std::generic_category()};
-            LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={}, size={}, ec_message={}",
-                PathToUTF8String(file_path), size, ec.message());
-        }
-        return set_size_result;
+    if (!IsOpen()) {
+        return false;
     }
-    return false;
+
+    errno = 0;
+
+#ifdef _WIN32
+    const auto set_size_result = _chsize_s(fileno(file), static_cast<s64>(size)) == 0;
+#else
+    const auto set_size_result = ftruncate(fileno(file), static_cast<s64>(size)) == 0;
+#endif
+
+    if (!set_size_result) {
+        const auto ec = std::error_code{errno, std::generic_category()};
+        LOG_ERROR(Common_Filesystem, "Failed to resize the file at path={}, size={}, ec_message={}",
+                  PathToUTF8String(file_path), size, ec.message());
+    }
+
+    return set_size_result;
 }
 
 u64 IOFile::GetSize() const {
-    if (IsMappedFile())
-        return mmap_size;
-    if (file) {
-        // Flush any unwritten buffered data into the file prior to retrieving the file mmap_size.
-        std::fflush(file);
-#if __ANDROID__
-        u64 file_size = 0;
-        if (Android::IsContentUri(file_path)) {
-            file_size = Android::GetSize(file_path);
-        } else {
-            std::error_code ec;
+    if (!IsOpen()) {
+        return 0;
+    }
 
-            file_size = fs::file_size(file_path, ec);
+    // Flush any unwritten buffered data into the file prior to retrieving the file size.
+    std::fflush(file);
 
-            if (ec) {
-                LOG_ERROR(Common_Filesystem, "Failed to retrieve the file mmap_size of path={}, ec_message={}",
-                    PathToUTF8String(file_path), ec.message());
-                return 0;
-            }
-        }
-#else
+#ifdef __ANDROID__
+    u64 file_size = 0;
+    if (Android::IsContentUri(file_path)) {
+        file_size = Android::GetSize(file_path);
+    } else {
         std::error_code ec;
-        auto const file_size = fs::file_size(file_path, ec);
+
+        file_size = fs::file_size(file_path, ec);
+
         if (ec) {
-            LOG_ERROR(Common_Filesystem, "Failed to retrieve the file mmap_size of path={}, ec_message={}",
-                PathToUTF8String(file_path), ec.message());
+            LOG_ERROR(Common_Filesystem,
+                      "Failed to retrieve the file size of path={}, ec_message={}",
+                      PathToUTF8String(file_path), ec.message());
             return 0;
         }
-#endif
-        return file_size;
     }
-    return 0;
+#else
+    std::error_code ec;
+
+    const auto file_size = fs::file_size(file_path, ec);
+
+    if (ec) {
+        LOG_ERROR(Common_Filesystem, "Failed to retrieve the file size of path={}, ec_message={}",
+                  PathToUTF8String(file_path), ec.message());
+        return 0;
+    }
+#endif
+
+    return file_size;
 }
 
 bool IOFile::Seek(s64 offset, SeekOrigin origin) const {
-    if (IsMappedFile()) {
-        // fuck you to whoever made this method const
-        switch (origin) {
-        case SeekOrigin::SetOrigin:
-            mmap_offset = s64(offset);
-            break;
-        case SeekOrigin::CurrentPosition:
-            mmap_offset += s64(offset);
-            break;
-        case SeekOrigin::End:
-            mmap_offset = s64(mmap_size) + s64(offset);
-            break;
-        }
-        return true;
+    if (!IsOpen()) {
+        return false;
     }
-    if (file) {
-        errno = 0;
-        const auto seek_result = fseeko(file, offset, ToSeekOrigin(origin)) == 0;
-        if (!seek_result) {
-            const auto ec = std::error_code{errno, std::generic_category()};
-            LOG_ERROR(Common_Filesystem, "Failed to seek the file at path={}, offset={}, origin={}, ec_message={}",
-                PathToUTF8String(file_path), offset, origin, ec.message());
-        }
-        return seek_result;
+
+    errno = 0;
+
+    const auto seek_result = fseeko(file, offset, ToSeekOrigin(origin)) == 0;
+
+    if (!seek_result) {
+        const auto ec = std::error_code{errno, std::generic_category()};
+        LOG_ERROR(Common_Filesystem,
+                  "Failed to seek the file at path={}, offset={}, origin={}, ec_message={}",
+                  PathToUTF8String(file_path), offset, origin, ec.message());
     }
-    return false;
+
+    return seek_result;
 }
 
 s64 IOFile::Tell() const {
-    if (IsMappedFile()) {
-        errno = 0;
-        return s64(mmap_offset);
+    if (!IsOpen()) {
+        return 0;
     }
-    if (file) {
-        errno = 0;
-        return ftello(file);
-    }
-    return 0;
+
+    errno = 0;
+
+    return ftello(file);
 }
 
 } // namespace Common::FS

src/common/fs/file.h

@@ -7,7 +7,6 @@
 #pragma once
 
 #include <cstdio>
-#include <cstring>
 #include <filesystem>
 #include <span>
 #include <type_traits>
@@ -25,12 +24,12 @@ enum class SeekOrigin {
 };
 
 /**
-* Opens a file stream at path with the specified open mode.
-*
-* @param file_stream Reference to file stream
-* @param path Filesystem path
-* @param open_mode File stream open mode
-*/
+ * Opens a file stream at path with the specified open mode.
+ *
+ * @param file_stream Reference to file stream
+ * @param path Filesystem path
+ * @param open_mode File stream open mode
+ */
 template <typename FileStream>
 void OpenFileStream(FileStream& file_stream, const std::filesystem::path& path,
                     std::ios_base::openmode open_mode) {
@@ -49,14 +48,14 @@ void OpenFileStream(FileStream& file_stream, const Path& path, std::ios_base::op
 #endif
 
 /**
-* Reads an entire file at path and returns a string of the contents read from the file.
-* If the filesystem object at path is not a regular file, this function returns an empty string.
-*
-* @param path Filesystem path
-* @param type File type
-*
-* @returns A string of the contents read from the file.
-*/
+ * Reads an entire file at path and returns a string of the contents read from the file.
+ * If the filesystem object at path is not a regular file, this function returns an empty string.
+ *
+ * @param path Filesystem path
+ * @param type File type
+ *
+ * @returns A string of the contents read from the file.
+ */
 [[nodiscard]] std::string ReadStringFromFile(const std::filesystem::path& path, FileType type);
 
 #ifdef _WIN32
@@ -71,18 +70,18 @@ template <typename Path>
 #endif
 
 /**
-* Writes a string to a file at path and returns the number of characters successfully written.
-* If a file already exists at path, its contents will be erased.
-* If a file does not exist at path, it creates and opens a new empty file for writing.
-* If the filesystem object at path exists and is not a regular file, this function returns 0.
-*
-* @param path Filesystem path
-* @param type File type
-*
-* @returns Number of characters successfully written.
-*/
+ * Writes a string to a file at path and returns the number of characters successfully written.
+ * If a file already exists at path, its contents will be erased.
+ * If a file does not exist at path, it creates and opens a new empty file for writing.
+ * If the filesystem object at path exists and is not a regular file, this function returns 0.
+ *
+ * @param path Filesystem path
+ * @param type File type
+ *
+ * @returns Number of characters successfully written.
+ */
 [[nodiscard]] size_t WriteStringToFile(const std::filesystem::path& path, FileType type,
-                                    std::string_view string);
+                                       std::string_view string);
 
 #ifdef _WIN32
 template <typename Path>
@@ -96,15 +95,15 @@ template <typename Path>
 #endif
 
 /**
-* Appends a string to a file at path and returns the number of characters successfully written.
-* If a file does not exist at path, it creates and opens a new empty file for appending.
-* If the filesystem object at path exists and is not a regular file, this function returns 0.
-*
-* @param path Filesystem path
-* @param type File type
-*
-* @returns Number of characters successfully written.
-*/
+ * Appends a string to a file at path and returns the number of characters successfully written.
+ * If a file does not exist at path, it creates and opens a new empty file for appending.
+ * If the filesystem object at path exists and is not a regular file, this function returns 0.
+ *
+ * @param path Filesystem path
+ * @param type File type
+ *
+ * @returns Number of characters successfully written.
+ */
 [[nodiscard]] size_t AppendStringToFile(const std::filesystem::path& path, FileType type,
                                         std::string_view string);
 
@@ -132,14 +131,14 @@ public:
                     FileShareFlag flag = FileShareFlag::ShareReadOnly);
 
     /**
-    * An IOFile is a lightweight wrapper on C Library file operations.
-    * Automatically closes an open file on the destruction of an IOFile object.
-    *
-    * @param path Filesystem path
-    * @param mode File access mode
-    * @param type File type, default is BinaryFile. Use TextFile to open the file as a text file
-    * @param flag (Windows only) File-share access flag, default is ShareReadOnly
-    */
+     * An IOFile is a lightweight wrapper on C Library file operations.
+     * Automatically closes an open file on the destruction of an IOFile object.
+     *
+     * @param path Filesystem path
+     * @param mode File access mode
+     * @param type File type, default is BinaryFile. Use TextFile to open the file as a text file
+     * @param flag (Windows only) File-share access flag, default is ShareReadOnly
+     */
     explicit IOFile(const std::filesystem::path& path, FileAccessMode mode,
                     FileType type = FileType::BinaryFile,
                     FileShareFlag flag = FileShareFlag::ShareReadOnly);
@@ -153,70 +152,84 @@ public:
     IOFile& operator=(IOFile&& other) noexcept;
 
     /**
-    * Gets the path of the file.
-    *
-    * @returns The path of the file.
-    */
+     * Gets the path of the file.
+     *
+     * @returns The path of the file.
+     */
     [[nodiscard]] std::filesystem::path GetPath() const;
 
     /**
-    * Gets the access mode of the file.
-    *
-    * @returns The access mode of the file.
-    */
+     * Gets the access mode of the file.
+     *
+     * @returns The access mode of the file.
+     */
     [[nodiscard]] FileAccessMode GetAccessMode() const;
 
     /**
-    * Gets the type of the file.
-    *
-    * @returns The type of the file.
-    */
+     * Gets the type of the file.
+     *
+     * @returns The type of the file.
+     */
     [[nodiscard]] FileType GetType() const;
 
     /**
-    * Opens a file at path with the specified file access mode.
-    * This function behaves differently depending on the FileAccessMode.
-    * These behaviors are documented in each enum value of FileAccessMode.
-    *
-    * @param path Filesystem path
-    * @param mode File access mode
-    * @param type File type, default is BinaryFile. Use TextFile to open the file as a text file
-    * @param flag (Windows only) File-share access flag, default is ShareReadOnly
-    */
+     * Opens a file at path with the specified file access mode.
+     * This function behaves differently depending on the FileAccessMode.
+     * These behaviors are documented in each enum value of FileAccessMode.
+     *
+     * @param path Filesystem path
+     * @param mode File access mode
+     * @param type File type, default is BinaryFile. Use TextFile to open the file as a text file
+     * @param flag (Windows only) File-share access flag, default is ShareReadOnly
+     */
     void Open(const std::filesystem::path& path, FileAccessMode mode,
-            FileType type = FileType::BinaryFile,
-            FileShareFlag flag = FileShareFlag::ShareReadOnly);
+              FileType type = FileType::BinaryFile,
+              FileShareFlag flag = FileShareFlag::ShareReadOnly);
+
+// #ifdef _WIN32
+//     template <typename Path>
+//     void Open(const Path& path, FileAccessMode mode, FileType type = FileType::BinaryFile,
+//               FileShareFlag flag = FileShareFlag::ShareReadOnly) {
+//         using ValueType = typename Path::value_type;
+//         if constexpr (IsChar<ValueType>) {
+//             Open(ToU8String(path), mode, type, flag);
+//         } else {
+//             Open(std::filesystem::path{path}, mode, type, flag);
+//         }
+//     }
+// #endif
 
     /// Closes the file if it is opened.
     void Close();
 
     /**
-    * Checks whether the file is open.
-    * Use this to check whether the calls to Open() or Close() succeeded.
-    *
-    * @returns True if the file is open, false otherwise.
-    */
+     * Checks whether the file is open.
+     * Use this to check whether the calls to Open() or Close() succeeded.
+     *
+     * @returns True if the file is open, false otherwise.
+     */
     [[nodiscard]] bool IsOpen() const;
 
     /**
-    * Helper function which deduces the value type of a contiguous STL container used in ReadSpan.
-    * If T is not a contiguous container as defined by the concept IsContiguousContainer, this
-    * calls ReadObject and T must be a trivially copyable object.
-    *
-    * See ReadSpan for more details if T is a contiguous container.
-    * See ReadObject for more details if T is a trivially copyable object.
-    *
-    * @tparam T Contiguous container or trivially copyable object
-    *
-    * @param data Container of T::value_type data or reference to object
-    *
-    * @returns Count of T::value_type data or objects successfully read.
-    */
+     * Helper function which deduces the value type of a contiguous STL container used in ReadSpan.
+     * If T is not a contiguous container as defined by the concept IsContiguousContainer, this
+     * calls ReadObject and T must be a trivially copyable object.
+     *
+     * See ReadSpan for more details if T is a contiguous container.
+     * See ReadObject for more details if T is a trivially copyable object.
+     *
+     * @tparam T Contiguous container or trivially copyable object
+     *
+     * @param data Container of T::value_type data or reference to object
+     *
+     * @returns Count of T::value_type data or objects successfully read.
+     */
     template <typename T>
     [[nodiscard]] size_t Read(T& data) const {
         if constexpr (IsContiguousContainer<T>) {
             using ContiguousType = typename T::value_type;
-            static_assert(std::is_trivially_copyable_v<ContiguousType>, "Data type must be trivially copyable.");
+            static_assert(std::is_trivially_copyable_v<ContiguousType>,
+                          "Data type must be trivially copyable.");
             return ReadSpan<ContiguousType>(data);
         } else {
             return ReadObject(data) ? 1 : 0;
@@ -224,24 +237,25 @@ public:
     }
 
     /**
-    * Helper function which deduces the value type of a contiguous STL container used in WriteSpan.
-    * If T is not a contiguous STL container as defined by the concept IsContiguousContainer, this
-    * calls WriteObject and T must be a trivially copyable object.
-    *
-    * See WriteSpan for more details if T is a contiguous container.
-    * See WriteObject for more details if T is a trivially copyable object.
-    *
-    * @tparam T Contiguous container or trivially copyable object
-    *
-    * @param data Container of T::value_type data or const reference to object
-    *
-    * @returns Count of T::value_type data or objects successfully written.
-    */
+     * Helper function which deduces the value type of a contiguous STL container used in WriteSpan.
+     * If T is not a contiguous STL container as defined by the concept IsContiguousContainer, this
+     * calls WriteObject and T must be a trivially copyable object.
+     *
+     * See WriteSpan for more details if T is a contiguous container.
+     * See WriteObject for more details if T is a trivially copyable object.
+     *
+     * @tparam T Contiguous container or trivially copyable object
+     *
+     * @param data Container of T::value_type data or const reference to object
+     *
+     * @returns Count of T::value_type data or objects successfully written.
+     */
     template <typename T>
     [[nodiscard]] size_t Write(const T& data) const {
         if constexpr (IsContiguousContainer<T>) {
             using ContiguousType = typename T::value_type;
-            static_assert(std::is_trivially_copyable_v<ContiguousType>, "Data type must be trivially copyable.");
+            static_assert(std::is_trivially_copyable_v<ContiguousType>,
+                          "Data type must be trivially copyable.");
             return WriteSpan<ContiguousType>(data);
         } else {
             static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
@@ -250,219 +264,197 @@ public:
     }
 
     /**
-    * Reads a span of T data from a file sequentially.
-    * This function reads from the current position of the file pointer and
-    * advances it by the (count of T * sizeof(T)) bytes successfully read.
-    *
-    * Failures occur when:
-    * - The file is not open
-    * - The opened file lacks read permissions
-    * - Attempting to read beyond the end-of-file
-    *
-    * @tparam T Data type
-    *
-    * @param data Span of T data
-    *
-    * @returns Count of T data successfully read.
-    */
+     * Reads a span of T data from a file sequentially.
+     * This function reads from the current position of the file pointer and
+     * advances it by the (count of T * sizeof(T)) bytes successfully read.
+     *
+     * Failures occur when:
+     * - The file is not open
+     * - The opened file lacks read permissions
+     * - Attempting to read beyond the end-of-file
+     *
+     * @tparam T Data type
+     *
+     * @param data Span of T data
+     *
+     * @returns Count of T data successfully read.
+     */
     template <typename T>
         requires std::is_trivially_copyable_v<T>
     [[nodiscard]] size_t ReadSpan(std::span<T> data) const {
-        if (IsMappedFile()) {
-            std::memcpy(data.data(), mmap_base + mmap_offset, sizeof(T) * data.size());
-            return data.size();
+        if (!IsOpen()) {
+            return 0;
         }
-        return IsOpen() ? std::fread(data.data(), sizeof(T), data.size(), file) : 0;
+        return std::fread(data.data(), sizeof(T), data.size(), file);
     }
 
     /**
-    * Writes a span of T data to a file sequentially.
-    * This function writes from the current position of the file pointer and
-    * advances it by the (count of T * sizeof(T)) bytes successfully written.
-    *
-    * Failures occur when:
-    * - The file is not open
-    * - The opened file lacks write permissions
-    *
-    * @tparam T Data type
-    *
-    * @param data Span of T data
-    *
-    * @returns Count of T data successfully written.
-    */
+     * Writes a span of T data to a file sequentially.
+     * This function writes from the current position of the file pointer and
+     * advances it by the (count of T * sizeof(T)) bytes successfully written.
+     *
+     * Failures occur when:
+     * - The file is not open
+     * - The opened file lacks write permissions
+     *
+     * @tparam T Data type
+     *
+     * @param data Span of T data
+     *
+     * @returns Count of T data successfully written.
+     */
     template <typename T>
     [[nodiscard]] size_t WriteSpan(std::span<const T> data) const {
         static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
-        if (IsMappedFile()) {
-            std::memcpy(mmap_base + mmap_offset, data.data(), sizeof(T) * data.size());
-            return data.size();
+
+        if (!IsOpen()) {
+            return 0;
         }
-        return IsOpen() ? std::fwrite(data.data(), sizeof(T), data.size(), file) : 0;
+
+        return std::fwrite(data.data(), sizeof(T), data.size(), file);
     }
 
     /**
-    * Reads a T object from a file sequentially.
-    * This function reads from the current position of the file pointer and
-    * advances it by the sizeof(T) bytes successfully read.
-    *
-    * Failures occur when:
-    * - The file is not open
-    * - The opened file lacks read permissions
-    * - Attempting to read beyond the end-of-file
-    *
-    * @tparam T Data type
-    *
-    * @param object Reference to object
-    *
-    * @returns True if the object is successfully read from the file, false otherwise.
-    */
+     * Reads a T object from a file sequentially.
+     * This function reads from the current position of the file pointer and
+     * advances it by the sizeof(T) bytes successfully read.
+     *
+     * Failures occur when:
+     * - The file is not open
+     * - The opened file lacks read permissions
+     * - Attempting to read beyond the end-of-file
+     *
+     * @tparam T Data type
+     *
+     * @param object Reference to object
+     *
+     * @returns True if the object is successfully read from the file, false otherwise.
+     */
     template <typename T>
     [[nodiscard]] bool ReadObject(T& object) const {
         static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
         static_assert(!std::is_pointer_v<T>, "T must not be a pointer to an object.");
-        if (IsMappedFile()) {
-            std::memcpy(&object, mmap_base + mmap_offset, sizeof(T));
-#ifdef _WIN32
-            return bool(sizeof(T));
-#else
-            return sizeof(T);
-#endif
+
+        if (!IsOpen()) {
+            return false;
         }
-        return IsOpen() ? std::fread(&object, sizeof(T), 1, file) == 1 : false;
+
+        return std::fread(&object, sizeof(T), 1, file) == 1;
     }
 
     /**
-    * Writes a T object to a file sequentially.
-    * This function writes from the current position of the file pointer and
-    * advances it by the sizeof(T) bytes successfully written.
-    *
-    * Failures occur when:
-    * - The file is not open
-    * - The opened file lacks write permissions
-    *
-    * @tparam T Data type
-    *
-    * @param object Const reference to object
-    *
-    * @returns True if the object is successfully written to the file, false otherwise.
-    */
+     * Writes a T object to a file sequentially.
+     * This function writes from the current position of the file pointer and
+     * advances it by the sizeof(T) bytes successfully written.
+     *
+     * Failures occur when:
+     * - The file is not open
+     * - The opened file lacks write permissions
+     *
+     * @tparam T Data type
+     *
+     * @param object Const reference to object
+     *
+     * @returns True if the object is successfully written to the file, false otherwise.
+     */
     template <typename T>
     [[nodiscard]] bool WriteObject(const T& object) const {
         static_assert(std::is_trivially_copyable_v<T>, "Data type must be trivially copyable.");
         static_assert(!std::is_pointer_v<T>, "T must not be a pointer to an object.");
-        if (IsMappedFile()) {
-            std::memcpy(mmap_base + mmap_offset, &object, sizeof(T));
-#ifdef _WIN32
-            return sizeof(T) != 0;
-#else
-            return sizeof(T);
-#endif
+
+        if (!IsOpen()) {
+            return false;
         }
-        return IsOpen() ? std::fwrite(&object, sizeof(T), 1, file) == 1 : false;
+
+        return std::fwrite(&object, sizeof(T), 1, file) == 1;
     }
 
     /**
-    * Specialized function to read a string of a given length from a file sequentially.
-    * This function writes from the current position of the file pointer and
-    * advances it by the number of characters successfully read.
-    * The size of the returned string may not match length if not all bytes are successfully read.
-    *
-    * @param length Length of the string
-    *
-    * @returns A string read from the file.
-    */
+     * Specialized function to read a string of a given length from a file sequentially.
+     * This function writes from the current position of the file pointer and
+     * advances it by the number of characters successfully read.
+     * The size of the returned string may not match length if not all bytes are successfully read.
+     *
+     * @param length Length of the string
+     *
+     * @returns A string read from the file.
+     */
     [[nodiscard]] std::string ReadString(size_t length) const;
 
     /**
-    * Specialized function to write a string to a file sequentially.
-    * This function writes from the current position of the file pointer and
-    * advances it by the number of characters successfully written.
-    *
-    * @param string Span of const char backed std::string or std::string_view
-    *
-    * @returns Number of characters successfully written.
-    */
+     * Specialized function to write a string to a file sequentially.
+     * This function writes from the current position of the file pointer and
+     * advances it by the number of characters successfully written.
+     *
+     * @param string Span of const char backed std::string or std::string_view
+     *
+     * @returns Number of characters successfully written.
+     */
     [[nodiscard]] size_t WriteString(std::span<const char> string) const;
 
     /**
-    * Attempts to flush any unwritten buffered data into the file.
-    *
-    * @returns True if the flush was successful, false otherwise.
-    */
+     * Attempts to flush any unwritten buffered data into the file.
+     *
+     * @returns True if the flush was successful, false otherwise.
+     */
     bool Flush() const;
 
     /**
-    * Attempts to commit the file into the disk.
-    * Note that this is an expensive operation as this forces the operating system to write
-    * the contents of the file associated with the file descriptor into the disk.
-    *
-    * @returns True if the commit was successful, false otherwise.
-    */
+     * Attempts to commit the file into the disk.
+     * Note that this is an expensive operation as this forces the operating system to write
+     * the contents of the file associated with the file descriptor into the disk.
+     *
+     * @returns True if the commit was successful, false otherwise.
+     */
     bool Commit() const;
 
     /**
-    * Resizes the file to a given size.
-    * If the file is resized to a smaller size, the remainder of the file is discarded.
-    * If the file is resized to a larger size, the new area appears as if zero-filled.
-    *
-    * Failures occur when:
-    * - The file is not open
-    *
-    * @param size File size in bytes
-    *
-    * @returns True if the file resize succeeded, false otherwise.
-    */
+     * Resizes the file to a given size.
+     * If the file is resized to a smaller size, the remainder of the file is discarded.
+     * If the file is resized to a larger size, the new area appears as if zero-filled.
+     *
+     * Failures occur when:
+     * - The file is not open
+     *
+     * @param size File size in bytes
+     *
+     * @returns True if the file resize succeeded, false otherwise.
+     */
     [[nodiscard]] bool SetSize(u64 size) const;
 
     /**
-    * Gets the size of the file.
-    *
-    * Failures occur when:
-    * - The file is not open
-    *
-    * @returns The file size in bytes of the file. Returns 0 on failure.
-    */
+     * Gets the size of the file.
+     *
+     * Failures occur when:
+     * - The file is not open
+     *
+     * @returns The file size in bytes of the file. Returns 0 on failure.
+     */
     [[nodiscard]] u64 GetSize() const;
 
     /**
-    * Moves the current position of the file pointer with the specified offset and seek origin.
-    *
-    * @param offset Offset from seek origin
-    * @param origin Seek origin
-    *
-    * @returns True if the file pointer has moved to the specified offset, false otherwise.
-    */
+     * Moves the current position of the file pointer with the specified offset and seek origin.
+     *
+     * @param offset Offset from seek origin
+     * @param origin Seek origin
+     *
+     * @returns True if the file pointer has moved to the specified offset, false otherwise.
+     */
     [[nodiscard]] bool Seek(s64 offset, SeekOrigin origin = SeekOrigin::SetOrigin) const;
 
     /**
-    * Gets the current position of the file pointer.
-    *
-    * @returns The current position of the file pointer.
-    */
+     * Gets the current position of the file pointer.
+     *
+     * @returns The current position of the file pointer.
+     */
     [[nodiscard]] s64 Tell() const;
 
-#ifdef _WIN32
-    inline bool IsMappedFile() const noexcept { return mapping_handle != nullptr; }
-#else // POSIX
-    inline bool IsMappedFile() const noexcept { return mmap_fd != -1; }
-#endif
-
+private:
     std::filesystem::path file_path;
     FileAccessMode file_access_mode{};
     FileType file_type{};
+
     std::FILE* file = nullptr;
-    // Any decent system should have mmap() for files
-    // Systems with artifical mmap() limitations should simply change the logic within file.cpp
-    // and reduce the threshold for which the mmap() is set to
-#ifdef _WIN32
-    void *mapping_handle = nullptr;
-    void *file_handle = nullptr;
-#else // POSIX
-    int mmap_fd = -1;
-#endif
-    u8* mmap_base = nullptr;
-    size_t mmap_size = 0;
-    mutable s64 mmap_offset = 0; // fuck you
 };
 
 } // namespace Common::FS

src/common/fs/path_util.cpp

@@ -136,6 +136,11 @@ public:
             eden_path = GetDataDirectory("XDG_DATA_HOME") / EDEN_DIR;
             eden_path_cache = GetDataDirectory("XDG_CACHE_HOME") / EDEN_DIR;
             eden_path_config = GetDataDirectory("XDG_CONFIG_HOME") / EDEN_DIR;
+#if defined(__EMSCRIPTEN__) || defined(__wasi__) || defined(__managarm__)
+            // folders MAY not exist in this distrobution/OS
+            CreateParentDir(GetDataDirectory("XDG_CONFIG_HOME"));
+            CreateParentDir(GetDataDirectory("XDG_CACHE_HOME"));
+#endif
         } else {
             eden_path_cache = eden_path / CACHE_DIR;
             eden_path_config = eden_path / CONFIG_DIR;

src/common/host_memory.cpp

@@ -394,7 +394,7 @@ private:
     ::Common::unordered_map<size_t, size_t> placeholder_host_pointers; ///< Placeholder backing offset
 };
 
-#elif defined(__OPENORBIS__) || defined(__managarm__)
+#elif defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__)
 // None of the luxuries of POSIX, all of the suffering
 // For managarm: see https://github.com/managarm/managarm/issues/1370
 #else // ^^^ Windows ^^^ vvv POSIX vvv
@@ -689,7 +689,7 @@ HostMemory::HostMemory(size_t backing_size_, size_t virtual_size_)
     : backing_size(backing_size_)
     , virtual_size(virtual_size_)
 {
-#if defined(__OPENORBIS__) || defined(__managarm__)
+#if defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__)
     LOG_WARNING(HW_Memory, "Platform doesn't support fastmem");
     fallback_buffer.emplace(backing_size);
     backing_base = fallback_buffer->data();
@@ -723,7 +723,7 @@ HostMemory::HostMemory(HostMemory&&) noexcept = default;
 HostMemory& HostMemory::operator=(HostMemory&&) noexcept = default;
 
 void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length, MemoryPermission perms, bool separate_heap) {
-#if !(defined(__OPENORBIS__) || defined(__managarm__))
+#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(host_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
@@ -737,7 +737,7 @@ void HostMemory::Map(size_t virtual_offset, size_t host_offset, size_t length, M
 }
 
 void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap) {
-#if !(defined(__OPENORBIS__) || defined(__managarm__))
+#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
     ASSERT(virtual_offset + length <= virtual_size);
@@ -749,7 +749,7 @@ void HostMemory::Unmap(size_t virtual_offset, size_t length, bool separate_heap)
 }
 
 void HostMemory::Protect(size_t virtual_offset, size_t length, MemoryPermission perm) {
-#if !(defined(__OPENORBIS__) || defined(__managarm__))
+#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
     ASSERT(virtual_offset % PageAlignment == 0);
     ASSERT(length % PageAlignment == 0);
     ASSERT(virtual_offset + length <= virtual_size);
@@ -768,7 +768,7 @@ void HostMemory::ClearBackingRegion(size_t physical_offset, size_t length, u32 f
 }
 
 void HostMemory::EnableDirectMappedAddress() {
-#if !(defined(__OPENORBIS__) || defined(__managarm__))
+#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
     if (impl) {
         impl->EnableDirectMappedAddress();
         virtual_size += reinterpret_cast<uintptr_t>(virtual_base);

src/common/host_memory.h

@@ -77,7 +77,7 @@ private:
     size_t backing_size{};
     size_t virtual_size{};
 
-#if !(defined(__OPENORBIS__) || defined(__managarm__))
+#if !(defined(__OPENORBIS__) || defined(__managarm__) || defined(__wasi__) || defined(__EMSCRIPTEN__))
     // Low level handler for the platform dependent memory routines
     class Impl;
     std::unique_ptr<Impl> impl;

src/common/settings_enums.h

@@ -92,14 +92,14 @@ struct EnumMetadata {
 // AudioEngine must be specified discretely due to having existing but slightly different
 // canonicalizations
 // TODO (lat9nq): Remove explicit definition of AudioEngine/sink_id
-enum class AudioEngine : u32 { Auto, Cubeb, Sdl3, Null, };
+enum class AudioEngine : u32 { Auto, Cubeb, Sdl3, Null, Oboe, };
 template<>
 inline std::vector<std::pair<std::string_view, AudioEngine>> EnumMetadata<AudioEngine>::Canonicalizations() {
     return {
         {"auto", AudioEngine::Auto},
         {"cubeb", AudioEngine::Cubeb},
         {"sdl3", AudioEngine::Sdl3},
-        {"null", AudioEngine::Null},
+        {"null", AudioEngine::Null}, {"oboe", AudioEngine::Oboe},
     };
 }
 /// @brief This is just a sufficiently large number that is more than the number of other enums declared here
@@ -113,7 +113,7 @@ inline AudioEngine EnumMetadata<AudioEngine>::GetFirst() {
 }
 template<>
 inline AudioEngine EnumMetadata<AudioEngine>::GetLast() {
-    return AudioEngine::Null;
+    return AudioEngine::Oboe;
 }
 
 ENUM(AudioMode, Mono, Stereo, Surround);

src/common/thread.cpp

@@ -490,6 +490,8 @@ void SetCurrentThreadPriority(ThreadPriority new_priority) {
         LOG_DEBUG(Common, "Could not set thread nice value to {}: {}", nice_value,
                   GetLastErrorMsg());
     }
+#elif defined(__EMSCRIPTEN__)
+    // TODO: set priority?
 #else
     const s32 max_prio = sched_get_priority_max(SCHED_OTHER);
     const s32 min_prio = sched_get_priority_min(SCHED_OTHER);
@@ -534,6 +536,8 @@ void SetCurrentThreadName(const char* name) {
     // See for reference
     // https://gitlab.freedesktop.org/mesa/mesa/-/blame/main/src/util/u_thread.c?ref_type=heads#L75
     (void)name;
+#elif defined(__EMSCRIPTEN__)
+    // TODO: set thread name?
 #else
     pthread_setname_np(pthread_self(), name);
 #endif

src/core/CMakeLists.txt

@@ -38,10 +38,6 @@ add_library(core STATIC
     debugger/debugger.cpp
     debugger/debugger.h
     debugger/debugger_interface.h
-    debugger/gdbstub.cpp
-    debugger/gdbstub.h
-    debugger/gdbstub_arch.cpp
-    debugger/gdbstub_arch.h
     device_memory.cpp
     device_memory.h
     device_memory_manager.h
@@ -1166,6 +1162,14 @@ add_library(core STATIC
     tools/freezer.h
     tools/renderdoc.cpp
     tools/renderdoc.h)
+if (NOT EMSCRIPTEN)
+    # incompatible with wasm's async model
+    target_sources(core PRIVATE
+        debugger/gdbstub.cpp
+        debugger/gdbstub.h
+        debugger/gdbstub_arch.cpp
+        debugger/gdbstub_arch.h)
+endif()
 
 if (ENABLE_WIFI_SCAN)
     target_sources(core PRIVATE internal_network/wifi_scanner.cpp)
@@ -1209,7 +1213,10 @@ target_include_directories(core PRIVATE ${OPUS_INCLUDE_DIRS})
 target_link_libraries(core PUBLIC common PRIVATE audio_core hid_core network video_core nx_tzdb tz)
 
 if (BOOST_NO_HEADERS)
-    target_link_libraries(core PUBLIC Boost::container Boost::heap Boost::asio Boost::process Boost::crc)
+    target_link_libraries(core PUBLIC Boost::container Boost::heap Boost::crc)
+    if (NOT EMSCRIPTEN)
+        target_link_libraries(core PUBLIC Boost::asio Boost::process)
+    endif()
 else()
     target_link_libraries(core PUBLIC Boost::headers)
 endif()

src/core/arm/dynarmic/arm_dynarmic.h

@@ -6,19 +6,20 @@
 
 #pragma once
 
+#ifndef __EMSCRIPTEN__
 #include <dynarmic/interface/halt_reason.h>
-
+#endif
 #include "core/arm/arm_interface.h"
 
 namespace Core {
 
+#ifndef __EMSCRIPTEN__
 constexpr Dynarmic::HaltReason StepThread = Dynarmic::HaltReason::Step;
 constexpr Dynarmic::HaltReason DataAbort = Dynarmic::HaltReason::MemoryAbort;
 constexpr Dynarmic::HaltReason BreakLoop = Dynarmic::HaltReason::UserDefined2;
 constexpr Dynarmic::HaltReason SupervisorCall = Dynarmic::HaltReason::UserDefined3;
 constexpr Dynarmic::HaltReason InstructionBreakpoint = Dynarmic::HaltReason::UserDefined4;
 constexpr Dynarmic::HaltReason PrefetchAbort = Dynarmic::HaltReason::UserDefined6;
-
 constexpr HaltReason TranslateHaltReason(Dynarmic::HaltReason hr) {
     static_assert(u64(HaltReason::StepThread) == u64(StepThread));
     static_assert(u64(HaltReason::DataAbort) == u64(DataAbort));
@@ -28,5 +29,6 @@ constexpr HaltReason TranslateHaltReason(Dynarmic::HaltReason hr) {
     static_assert(u64(HaltReason::PrefetchAbort) == u64(PrefetchAbort));
     return HaltReason(hr);
 }
+#endif
 
 } // namespace Core

src/core/debugger/debugger.cpp

@@ -6,30 +6,54 @@
 
 #include <mutex>
 #include <utility>
+
+#if defined(__EMSCRIPTEN__) || defined(__wasi__)
+// TODO: gdb stub compat with emscripten?
+#else
 #include <boost/asio.hpp>
 #include <boost/version.hpp>
-
 #if BOOST_VERSION > 108400 && (!defined(_WINDOWS) && !defined(__ANDROID__)) || defined(YUZU_BOOST_v1)
 #define USE_BOOST_v1
 #endif
-
 #ifdef USE_BOOST_v1
 #include <boost/process/v1/async_pipe.hpp>
 #else
 #include <boost/process/async_pipe.hpp>
 #endif
+#endif
 
 #include "common/logging.h"
 #include "common/polyfill_thread.h"
 #include "common/thread.h"
 #include "core/core.h"
 #include "core/debugger/debugger.h"
+#if defined(__EMSCRIPTEN__) || defined(__wasi__)
+// TODO: gdbstub with emscripten?
+#else
 #include "core/debugger/debugger_interface.h"
 #include "core/debugger/gdbstub.h"
+#endif
 #include "core/hle/kernel/global_scheduler_context.h"
 #include "core/hle/kernel/k_process.h"
 #include "core/hle/kernel/k_scheduler.h"
 
+#if defined(__EMSCRIPTEN__) || defined(__wasi__)
+namespace Core {
+// Dummy
+class DebuggerImpl {
+    char pad;
+};
+Debugger::Debugger(Core::System& system, u16 port) {}
+Debugger::~Debugger() = default;
+bool Debugger::NotifyThreadStopped(Kernel::KThread* thread) {
+    return false;
+}
+bool Debugger::NotifyThreadWatchpoint(Kernel::KThread* thread, const Kernel::DebugWatchpoint& watch) {
+    return false;
+}
+void Debugger::NotifyShutdown() {}
+} // namespace Core
+#else
 template <typename Readable, typename Buffer, typename Callback>
 static void AsyncReceiveInto(Readable& r, Buffer& buffer, Callback&& c) {
     static_assert(std::is_trivial_v<Buffer>);
@@ -358,7 +382,7 @@ private:
 
         ConnectionState(boost::asio::ip::tcp::socket&& client_socket_, async_pipe signal_pipe_, Kernel::KernelCore& kernel)
             : client_socket{std::move(client_socket_)}
-            , signal_pipe{std::move(signal_pipe_)}
+            , signal_pipe{signal_pipe_}
             , active_thread{kernel, nullptr}
         {}
 
@@ -400,3 +424,4 @@ void Debugger::NotifyShutdown() {
 }
 
 } // namespace Core
+#endif

src/core/hle/kernel/k_process.cpp

@@ -7,8 +7,14 @@
 #include <random>
 #include "common/scope_exit.h"
 #include "common/settings.h"
+
+#include "core/arm/exclusive_monitor.h"
+#ifndef __EMSCRIPTEN__
 #include "core/arm/dynarmic/arm_dynarmic.h"
 #include "core/arm/dynarmic/dynarmic_exclusive_monitor.h"
+#include "core/arm/dynarmic/arm_dynarmic_32.h"
+#include "core/arm/dynarmic/arm_dynarmic_64.h"
+#endif
 #include "core/core.h"
 #include "core/hle/kernel/k_process.h"
 #include "core/hle/kernel/k_scoped_resource_reservation.h"
@@ -18,8 +24,6 @@
 #include "core/hle/kernel/k_thread_queue.h"
 #include "core/hle/kernel/k_worker_task_manager.h"
 
-#include "core/arm/dynarmic/arm_dynarmic_32.h"
-#include "core/arm/dynarmic/arm_dynarmic_64.h"
 #ifdef HAS_NCE
 #include "core/arm/nce/arm_nce.h"
 #endif
@@ -1021,9 +1025,6 @@ Result KProcess::Run(KernelCore& kernel, s32 priority, size_t stack_size) {
 
     // Suspend for debug, if we should.
     if (kernel.System().DebuggerEnabled()) {
-        LOG_INFO(Debug_GDBStub,
-                 "GDB stub enabled; suspending guest process until a debugger continues execution on port {}",
-                 Settings::values.gdbstub_port.GetValue());
         main_thread->RequestSuspend(kernel, SuspendType::Debug);
     }
 
@@ -1303,9 +1304,11 @@ void KProcess::LoadModule(KernelCore& kernel, CodeSet code_set, KProcessAddress
 }
 
 void KProcess::InitializeInterfaces(KernelCore& kernel) {
+#ifdef __EMSCRIPTEN__
+    ASSERT(false && "unimplemented");
+#else
     m_exclusive_monitor =
         Core::MakeExclusiveMonitor(this->GetMemory(), Core::Hardware::NUM_CPU_CORES);
-
 #ifdef HAS_NCE
     if (this->IsApplication() && Settings::IsNceEnabled()) {
         for (size_t i = 0; i < Core::Hardware::NUM_CPU_CORES; i++)
@@ -1325,6 +1328,7 @@ void KProcess::InitializeInterfaces(KernelCore& kernel) {
                 static_cast<Core::DynarmicExclusiveMonitor&>(*m_exclusive_monitor), i);
         }
     }
+#endif
 }
 
 bool KProcess::InsertWatchpoint(KernelCore& kernel, KProcessAddress addr, u64 size, DebugWatchpointType type) {

src/core/hle/service/services.cpp

@@ -88,15 +88,22 @@ Services::Services(std::shared_ptr<SM::ServiceManager>& sm, Core::System& system
 
     // BEGONE cold clones of lambdas, for I have merged you all into a SINGLE lambda instead of
     // spamming lambdas like it's some kind of lambda calculus class
-    for (auto const& e : std::vector<std::pair<std::string_view, void (*)(Core::System&)>>{
+    std::vector<std::pair<std::string_view, void (*)(Core::System&)>> rt_services{
         {"audio",      &Audio::LoopProcess},
         {"FS",         &FileSystem::LoopProcess},
         {"ldn",        &LDN::LoopProcess},
         {"nvservices", &Nvidia::LoopProcess},
         {"bsdsocket",  &Sockets::LoopProcess},
-    })
+    };
+#if defined(__EMSCRIPTEN__) || defined(__wasi__) || defined(__OPENORBIS__)
+    for (auto const& e : rt_services)
+        kernel.RunOnGuestCoreProcess(std::string(e.first), [&system, f = e.second] { f(system); });
+    kernel.RunOnGuestCoreProcess("vi", [&, token] { VI::LoopProcess(system, token); });
+#else
+    for (auto const& e : rt_services)
         kernel.RunOnHostCoreProcess(std::string(e.first), [&system, f = e.second] { f(system); }).detach();
-    kernel.RunOnHostCoreProcess("vi",         [&, token] { VI::LoopProcess(system, token); }).detach();
+    kernel.RunOnHostCoreProcess("vi", [&, token] { VI::LoopProcess(system, token); }).detach();
+#endif
     // Avoid cold clones of lambdas -- succintly
     for (auto const& e : std::vector<std::pair<std::string_view, void (*)(Core::System&)>>{
         {"sm",         &SM::LoopProcess},
@@ -120,7 +127,10 @@ Services::Services(std::shared_ptr<SM::ServiceManager>& sm, Core::System& system
         {"glue",       &Glue::LoopProcess},
         {"grc",        &GRC::LoopProcess},
         {"hid",        &HID::LoopProcess},
+// Must match with src/core/CMakeLists.txt for target_source of jit.cpp
+#if defined(ARCHITECTURE_x86_64) || defined(ARCHITECTURE_arm64) || defined(ARCHITECTURE_riscv64) || defined(ARCHITECTURE_loongarch64)
         {"jit",        &JIT::LoopProcess},
+#endif
         {"lbl",        &LBL::LoopProcess},
         {"Loader",     &LDR::LoopProcess},
         {"LogManager.Prod", &LM::LoopProcess},

src/hid_core/resources/abstracted_pad/abstract_mcu_handler.h

@@ -28,7 +28,10 @@ enum class NpadMcuState : u32 {
 struct NpadMcuHolder {
     NpadMcuState state;
     INSERT_PADDING_BYTES(0x4);
-    IAbstractedPad* abstracted_pad;
+    union {
+        IAbstractedPad* abstracted_pad;
+        u64 abstracted_pad_raw;
+    };
 };
 static_assert(sizeof(NpadMcuHolder) == 0x10, "NpadMcuHolder is an invalid size");
 

src/hid_core/resources/shared_memory_holder.h

@@ -33,9 +33,15 @@ public:
     bool is_created{};
     bool is_mapped{};
     INSERT_PADDING_BYTES(0x5);
-    Kernel::KSharedMemory* shared_memory;
+    union {
+        Kernel::KSharedMemory* shared_memory = nullptr;
+        u64 shared_memory_raw;
+    };
     INSERT_PADDING_BYTES(0x38);
-    SharedMemoryFormat* address = nullptr;
+    union {
+        SharedMemoryFormat* address = nullptr;
+        u64 address_raw;
+    };
 };
 // Correct size is 0x50 bytes
 static_assert(sizeof(SharedMemoryHolder) == 0x50, "SharedMemoryHolder is an invalid size");

src/input_common/CMakeLists.txt

@@ -15,8 +15,6 @@ add_library(input_common STATIC
     drivers/tas_input.h
     drivers/touch_screen.cpp
     drivers/touch_screen.h
-    drivers/udp_client.cpp
-    drivers/udp_client.h
     drivers/virtual_amiibo.cpp
     drivers/virtual_amiibo.h
     drivers/virtual_gamepad.cpp
@@ -34,8 +32,12 @@ add_library(input_common STATIC
     input_poller.cpp
     input_poller.h
     main.cpp
-    main.h
-)
+    main.h)
+if (NOT EMSCRIPTEN)
+    target_sources(input_common PRIVATE
+        drivers/udp_client.cpp
+        drivers/udp_client.h)
+endif()
 
 if (MSVC)
     target_compile_options(input_common PRIVATE

src/input_common/drivers/android.cpp

@@ -114,7 +114,7 @@ std::set<s32> Android::GetDeviceAxes(JNIEnv* env, jobject& j_device) const {
     std::set<s32> axes;
     for (int i = 0; i < env->GetArrayLength(j_axes); ++i) {
         jobject axis = env->GetObjectArrayElement(j_axes, i);
-        axes.insert(env->CallIntMethod(axis, Common::Android::GetIntegerValueMethod()));
+        axes.insert(env->GetIntField(axis, Common::Android::GetIntegerValueField()));
     }
     return axes;
 }

src/input_common/main.cpp

@@ -12,7 +12,6 @@
 #include "input_common/drivers/mouse.h"
 #include "input_common/drivers/tas_input.h"
 #include "input_common/drivers/touch_screen.h"
-#include "input_common/drivers/udp_client.h"
 #include "input_common/drivers/virtual_amiibo.h"
 #include "input_common/drivers/virtual_gamepad.h"
 #include "input_common/helpers/stick_from_buttons.h"
@@ -21,6 +20,9 @@
 #include "input_common/input_mapping.h"
 #include "input_common/input_poller.h"
 #include "input_common/main.h"
+#ifndef __EMSCRIPTEN__
+#include "input_common/drivers/udp_client.h"
+#endif
 
 #ifdef ENABLE_LIBUSB
 #include "input_common/drivers/gc_adapter.h"
@@ -82,7 +84,9 @@ struct InputSubsystem::Impl {
 #ifdef ENABLE_LIBUSB
         RegisterEngine("gcpad", gcadapter);
 #endif
+#ifndef __EMSCRIPTEN__
         RegisterEngine("cemuhookudp", udp_client);
+#endif
         RegisterEngine("tas", tas_input);
         RegisterEngine("camera", camera);
 #ifdef __ANDROID__
@@ -116,7 +120,9 @@ struct InputSubsystem::Impl {
 #ifdef ENABLE_LIBUSB
         UnregisterEngine(gcadapter);
 #endif
+#ifndef __EMSCRIPTEN__
         UnregisterEngine(udp_client);
+#endif
         UnregisterEngine(tas_input);
         UnregisterEngine(camera);
 #ifdef __ANDROID__
@@ -152,8 +158,10 @@ struct InputSubsystem::Impl {
         auto gcadapter_devices = gcadapter->GetInputDevices();
         devices.insert(devices.end(), gcadapter_devices.begin(), gcadapter_devices.end());
 #endif
+#ifndef __EMSCRIPTEN__
         auto udp_devices = udp_client->GetInputDevices();
         devices.insert(devices.end(), udp_devices.begin(), udp_devices.end());
+#endif
 #ifdef HAVE_SDL3
         auto joycon_devices = joycon->GetInputDevices();
         devices.insert(devices.end(), joycon_devices.begin(), joycon_devices.end());
@@ -186,9 +194,11 @@ struct InputSubsystem::Impl {
             return gcadapter;
         }
 #endif
+#ifndef __EMSCRIPTEN__
         if (engine == udp_client->GetEngineName()) {
             return udp_client;
         }
+#endif
 #ifdef HAVE_SDL3
         if (engine == sdl->GetEngineName()) {
             return sdl;
@@ -271,9 +281,11 @@ struct InputSubsystem::Impl {
             return true;
         }
 #endif
+#ifndef __EMSCRIPTEN__
         if (engine == udp_client->GetEngineName()) {
             return true;
         }
+#endif
         if (engine == tas_input->GetEngineName()) {
             return true;
         }
@@ -300,7 +312,9 @@ struct InputSubsystem::Impl {
 #ifdef ENABLE_LIBUSB
         gcadapter->BeginConfiguration();
 #endif
+#ifndef __EMSCRIPTEN__
         udp_client->BeginConfiguration();
+#endif
 #ifdef HAVE_SDL3
         sdl->BeginConfiguration();
         joycon->BeginConfiguration();
@@ -316,7 +330,9 @@ struct InputSubsystem::Impl {
 #ifdef ENABLE_LIBUSB
         gcadapter->EndConfiguration();
 #endif
+#ifndef __EMSCRIPTEN__
         udp_client->EndConfiguration();
+#endif
 #ifdef HAVE_SDL3
         sdl->EndConfiguration();
         joycon->EndConfiguration();
@@ -341,7 +357,9 @@ struct InputSubsystem::Impl {
     std::shared_ptr<Mouse> mouse;
     std::shared_ptr<TouchScreen> touch_screen;
     std::shared_ptr<TasInput::Tas> tas_input;
+#ifndef __EMSCRIPTEN__
     std::shared_ptr<CemuhookUDP::UDPClient> udp_client;
+#endif
     std::shared_ptr<Camera> camera;
     std::shared_ptr<VirtualAmiibo> virtual_amiibo;
     std::shared_ptr<VirtualGamepad> virtual_gamepad;
@@ -470,7 +488,9 @@ bool InputSubsystem::IsStickInverted(const Common::ParamPackage& params) const {
 }
 
 void InputSubsystem::ReloadInputDevices() {
+#ifndef __EMSCRIPTEN__
     impl->udp_client.get()->ReloadSockets();
+#endif
 }
 
 void InputSubsystem::BeginMapping(Polling::InputType type) {

src/shader_recompiler/CMakeLists.txt

@@ -257,8 +257,7 @@ else()
         # Bracket depth determines maximum size of a fold expression in Clang since 9c9974c3ccb6.
         # And this in turns limits the size of a std::array.
         $<$<CXX_COMPILER_ID:Clang>:-fbracket-depth=1024>
-        $<$<CXX_COMPILER_ID:AppleClang>:-fbracket-depth=1024>
-    )
+        $<$<CXX_COMPILER_ID:AppleClang>:-fbracket-depth=1024>)
 endif()
 
 create_target_directory_groups(shader_recompiler)

src/shader_recompiler/environment.h

@@ -31,7 +31,7 @@ struct CbufWordKey {
 
 struct CbufWordKeyHash {
     constexpr size_t operator()(const CbufWordKey& k) const noexcept {
-        return (size_t(k.index) << 32) ^ k.offset;
+        return size_t((u64(k.index) << 32) ^ u64(k.offset));
     }
 };
 

src/shader_recompiler/frontend/maxwell/translate/impl/texture_fetch_swizzled.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -157,16 +160,14 @@ IR::Value Sample(TranslatorVisitor& v, u64 insn) {
 
 unsigned Swizzle(u64 insn) {
     const Encoding texs{insn};
-    const size_t encoding{texs.swizzle};
+    u8 const encoding = u8(texs.swizzle);
     if (texs.dest_reg_b == IR::Reg::RZ) {
-        if (encoding >= RG_LUT.size()) {
+        if (encoding >= RG_LUT.size())
             throw NotImplementedException("Illegal RG encoding {}", encoding);
-        }
         return RG_LUT[encoding];
     } else {
-        if (encoding >= RGBA_LUT.size()) {
+        if (encoding >= RGBA_LUT.size())
             throw NotImplementedException("Illegal RGBA encoding {}", encoding);
-        }
         return RGBA_LUT[encoding];
     }
 }

src/shader_recompiler/frontend/maxwell/translate/impl/texture_load_swizzled.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -142,16 +145,14 @@ IR::Value Sample(TranslatorVisitor& v, u64 insn) {
 
 unsigned Swizzle(u64 insn) {
     const Encoding tlds{insn};
-    const size_t encoding{tlds.swizzle};
+    u8 const encoding = u8(tlds.swizzle);
     if (tlds.dest_reg_b == IR::Reg::RZ) {
-        if (encoding >= RG_LUT.size()) {
+        if (encoding >= RG_LUT.size())
             throw NotImplementedException("Illegal RG encoding {}", encoding);
-        }
         return RG_LUT[encoding];
     } else {
-        if (encoding >= RGBA_LUT.size()) {
+        if (encoding >= RGBA_LUT.size())
             throw NotImplementedException("Illegal RGBA encoding {}", encoding);
-        }
         return RGBA_LUT[encoding];
     }
 }

src/yuzu_cmd/CMakeLists.txt

@@ -75,3 +75,15 @@ if (NOT MSVC)
         $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-unused-parameter>
         $<$<COMPILE_LANGUAGE:C,CXX>:-Wno-missing-field-initializers>)
 endif()
+
+if (EMSCRIPTEN)
+    # 10GB is required at max... yikes!
+    target_link_options(yuzu-cmd PRIVATE
+        -sALLOW_MEMORY_GROWTH=1
+        -sINITIAL_MEMORY=33554432
+        -sMAXIMUM_MEMORY=10737418240
+        -sGLOBAL_BASE=16777216
+        -sEXPORTED_RUNTIME_METHODS=['FS']
+        -sPTHREAD_POOL_SIZE_STRICT=0
+        -sPTHREAD_POOL_SIZE=navigator.hardwareConcurrency)
+endif()

tools/README.md

@@ -30,6 +30,7 @@ Tools for Eden and other subprojects. When adding new scripts please use `#!/bin
 - `find-unused-strings.sh`: Find any unused strings in the Android app (XML -> Kotlin).
 - `cpp-lint.sh`: Homemade dumb C++ linter.
 - `fuzzsettings.cpp`: Fuzz settings files.
+- `miniserver.js`: Make a quick server that serves a page with the WASM on it, takes a single argument which is the path to the build directory containing *both* `eden-cli.js` and `eden-cli.wasm`. Run via `node.js`, `wasmtime` isn't supported.
 
 ## Android
 

tools/miniserver.js

@@ -0,0 +1,127 @@
+#!/usr/bin/env node
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import { createServer } from 'http';
+import { readFile } from 'fs';
+import { join } from 'path';
+console.log(`dont forget to run: "npm --global install @jdmichaud/dwarf-2-sourcemap" for better debugging!`);
+const server = createServer((req, res) => {
+    console.log(`get ${req.url}`);
+    if (req.url === '/') {
+        // https://developer.mozilla.org/en-US/docs/WebAssembly/Guides/Loading_and_running
+        // If your browser doesn't support fetch... HAHA GET FUCKED
+        res.writeHead(200, {
+            'Content-Type': 'text/html',
+            'Cross-Origin-Opener-Policy': 'same-origin',
+            'Cross-Origin-Embedder-Policy': 'require-corp'
+        });
+        res.end(`<!DOCTYPE html>
+<html>
+<head>
+<title>eden-cli</title>
+</head>
+<body style="margin:0;padding:0;background-color:black;color:white;font-family:Monospace,Tahoma,Arial;">
+<div style="display:grid;grid-template-columns:1fr 1fr;gap:2px;width:100%;height:100vh;">
+    <canvas id="canvas" oncontextmenu="event.preventDefault()" style="width:100%;height:100%;background-color:gray;"></canvas>
+    <div id="tty-stdout"></div>
+</div>
+<script>
+var Module = { //do not prepend var
+    mainScriptUrlOrBlob: 'eden-cli.js',
+    arguments: ['--null-render', '--singlecore', '--filter', '*:Trace', '/home/web_user/game.nro'],
+    canvas: document.getElementById('canvas'),
+    print: (e) => {
+        e = e.replace('[1;31m', '<span style="color:red;font-weight:bold;">');
+        e = e.replace('[0;37m', '<span style="color:white;font-weight:bold;">');
+        e = e.replace('[1;35m', '<span style="color:pink;font-weight:bold;">');
+        e = e.replace('[1;33m', '<span style="color:yellow;font-weight:bold;">');
+        e = e.replace('[0;36m', '<span style="color:white;font-weight:bold;">');
+        e = e.replace('[0m', '</span>');
+        document.getElementById('tty-stdout').innerHTML += \`\${e}</br>\`;
+    },
+    printErr: (e) => {
+        document.getElementById('tty-stdout').innerHTML += \`<span style="color:red">\${e}</span></br>\`;
+    },
+    // not a wasm func but idc
+    printInternal: (e) => {
+        document.getElementById('tty-stdout').innerHTML += \`<span style="color:white">Internal WASM: \${e}</span></br>\`;
+    },
+    preInit: [
+        () => {
+            // copy just most relevant :)
+            Module.FS.mkdir('/home/web_user/.local');
+            Module.FS.mkdir('/home/web_user/.local/share');
+            Module.FS.mkdir('/home/web_user/.local/share/eden');
+            Module.FS.mkdir('/home/web_user/.config');
+            Module.FS.mkdir('/home/web_user/.config/eden');
+            Module.FS.createDataFile('/home/web_user', 'game.nro', gameNroFileBuffer, true, false, true);
+        }
+    ],
+    onRuntimeInitialized: () => { Module.printInternal("runtime ok"); },
+    setStatus: (e) => { Module.printInternal(e); },
+    monitorRunDependencies: (e) => { Module.printInternal("monitor deps: " + e); },
+    __wasm_call_ctors: () => { Module.printInternal("ctors beep"); },
+};
+var gameNroFileBuffer = {};
+Module.printInternal(\`Atomics: \${window.Atomics}, SharedArrayBuffer: \${window.SharedArrayBuffer}\`);
+Module.printInternal("trying to load script (if it hangs here check console)");
+fetch('game.nro').then((resp) => {
+    if (!resp.ok)
+        throw Error(\`\${resp.status}\`);
+    return resp.bytes();
+}).then((buffer) => {
+    gameNroFileBuffer = buffer;
+    // load the thingy AFTER loading the nro
+    Module.printInternal(\`loading from ${build_dir}/\${Module.mainScriptUrlOrBlob}\`);
+    var script = document.createElement('script');
+    script.src = '/eden-cli.js';
+    script.onload = (e) => Module.printInternal(\`loaded WASMy script \${e}!!\`);
+    document.head.appendChild(script);
+}).catch(Module.printErr);
+</script>
+</body>
+</html>`);
+    } else if (req.url === '/eden-cli.js') {
+        readFile(join(build_dir, 'eden-cli.js'), (err, content) => {
+            res.writeHead(200, {
+                'Content-Type': 'application/javascript',
+                'Cross-Origin-Opener-Policy': 'same-origin',
+                'Cross-Origin-Embedder-Policy': 'require-corp'
+            });
+            res.end(content, 'utf-8');
+        });
+    } else if (req.url === '/eden-cli.wasm') {
+        readFile(join(build_dir, 'eden-cli.wasm'), (err, content) => {
+            res.writeHead(200, {
+                'Content-Type': 'application/wasm',
+                'Cross-Origin-Opener-Policy': 'same-origin',
+                'Cross-Origin-Embedder-Policy': 'require-corp'
+            });
+            res.end(content);
+        });
+    } else if (req.url === '/game.nro') {
+        readFile(nro_file, (err, content) => {
+            res.writeHead(200, {
+                'Content-Type': 'application/octet-stream',
+                'Cross-Origin-Opener-Policy': 'same-origin',
+                'Cross-Origin-Embedder-Policy': 'require-corp'
+            });
+            res.end(content);
+        });
+    } else {
+        res.writeHead(404, {});
+        res.end('', 'utf-8');
+    }
+});
+
+const build_dir = process.argv[2];
+const nro_file = process.argv[3];
+if (typeof build_dir == "undefined" || typeof nro_file == "undefined") {
+    console.log(`Usage: ${process.argv[0]} ${process.argv[1]} [build directory] [NRO file]`);
+} else {
+    server.listen(2210, () => {
+        console.log(`${process.argv[0]} ${process.argv[1]} http://localhost:2210`);
+        console.log(`build dir = ${build_dir}`);
+    });
+}