Add riscv64 support

app/build.gradle.kts

@@ -27,7 +27,7 @@ android {
         versionName = Config.version
         versionCode = Config.versionCode
         ndk {
-            abiFilters += listOf("armeabi-v7a", "arm64-v8a", "x86", "x86_64")
+            abiFilters += listOf("armeabi-v7a", "arm64-v8a", "x86", "x86_64", "riscv64")
             debugSymbolLevel = "FULL"
         }
     }

build.py

@@ -68,12 +68,13 @@ if shutil.which("ccache") is not None:
 cpu_count = multiprocessing.cpu_count()
 os_name = platform.system().lower()
 
-archs = ["armeabi-v7a", "x86", "arm64-v8a", "x86_64"]
+archs = ["armeabi-v7a", "x86", "arm64-v8a", "x86_64", "riscv64"]
 triples = [
     "armv7a-linux-androideabi",
     "i686-linux-android",
     "aarch64-linux-android",
     "x86_64-linux-android",
+    "riscv64-linux-android",
 ]
 default_targets = ["magisk", "magiskinit", "magiskboot", "magiskpolicy", "busybox"]
 support_targets = default_targets + ["resetprop"]

buildSrc/src/main/java/Setup.kt

@@ -229,32 +229,16 @@ fun Project.setupApp() {
 
     val syncLibs by tasks.registering(Sync::class) {
         into("src/main/jniLibs")
-        into("armeabi-v7a") {
-            from(rootProject.file("native/out/armeabi-v7a")) {
-                include("busybox", "magiskboot", "magiskinit", "magiskpolicy", "magisk")
-                rename { "lib$it.so" }
-            }
-        }
-        into("x86") {
-            from(rootProject.file("native/out/x86")) {
-                include("busybox", "magiskboot", "magiskinit", "magiskpolicy", "magisk")
-                rename { "lib$it.so" }
-            }
-        }
-        into("arm64-v8a") {
-            from(rootProject.file("native/out/arm64-v8a")) {
-                include("busybox", "magiskboot", "magiskinit", "magiskpolicy", "magisk")
-                rename { "lib$it.so" }
-            }
-        }
-        into("x86_64") {
-            from(rootProject.file("native/out/x86_64")) {
-                include("busybox", "magiskboot", "magiskinit", "magiskpolicy", "magisk")
-                rename { "lib$it.so" }
+        for (abi in arrayOf("armeabi-v7a", "x86", "arm64-v8a", "x86_64", "riscv64")) {
+            into(abi) {
+                from(rootProject.file("native/out/$abi")) {
+                    include("busybox", "magiskboot", "magiskinit", "magiskpolicy", "magisk")
+                    rename { "lib$it.so" }
+                }
             }
         }
         onlyIf {
-            if (inputs.sourceFiles.files.size != 20)
+            if (inputs.sourceFiles.files.size != 25)
                 throw StopExecutionException("Please build binaries first! (./build.py binary)")
             true
         }

native/build.gradle.kts

@@ -25,6 +25,7 @@ android {
                     "B_MAGISK=1", "B_INIT=1", "B_BOOT=1", "B_POLICY=1",
                     "B_PRELOAD=1", "B_PROP=1", "B_CRT0=1"
                 )
+                abiFilters("armeabi-v7a", "arm64-v8a", "x86", "x86_64", "riscv64")
             }
         }
     }

native/src/Application.mk

@@ -1,5 +1,5 @@
 APP_BUILD_SCRIPT := src/Android.mk
-APP_ABI          := armeabi-v7a arm64-v8a x86 x86_64
+APP_ABI          := armeabi-v7a arm64-v8a x86 x86_64 riscv64
 APP_CFLAGS       := -Wall -Oz -fomit-frame-pointer -flto
 APP_LDFLAGS      := -flto -Wl,--icf=all
 APP_CPPFLAGS     := -std=c++23

native/src/base/include/embed.hpp

@@ -6,6 +6,8 @@
 #include <x86_binaries.h>
 #elif defined(__x86_64__)
 #include <x86_64_binaries.h>
+#elif defined(__riscv)
+#include <riscv64_binaries.h>
 #else
 #error Unsupported ABI
 #endif

native/src/core/module.cpp

@@ -418,6 +418,9 @@ static void collect_modules(bool open_zygisk) {
 #elif defined(__x86_64__)
                 info.z32 = openat(modfd, "zygisk/x86.so", O_RDONLY | O_CLOEXEC);
                 info.z64 = openat(modfd, "zygisk/x86_64.so", O_RDONLY | O_CLOEXEC);
+#elif defined(__riscv)
+                info.z32 = -1;
+                info.z64 = openat(modfd, "zygisk/riscv64.so", O_RDONLY | O_CLOEXEC);
 #else
 #error Unsupported ABI
 #endif

native/src/core/zygisk/hook.cpp

@@ -313,6 +313,14 @@ static const NativeBridgeRuntimeCallbacks* find_runtime_callbacks(struct _Unwind
         if (val >= start && val < end)
             return reinterpret_cast<const NativeBridgeRuntimeCallbacks*>(val);
     }
+#elif defined(__riscv)
+    // x8-x9, x18-x27 callee-saved registers
+    for (int i : {8, 9, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27}) {
+        auto val = static_cast<uintptr_t>(_Unwind_GetGR(ctx, i));
+        ZLOGV("x%d = %p\n", i, reinterpret_cast<void *>(val));
+        if (val >= start && val < end)
+            return reinterpret_cast<const NativeBridgeRuntimeCallbacks*>(val);
+    }
 #else
 #error "Unsupported architecture"
 #endif

native/src/external/Android.mk

@@ -215,6 +215,9 @@ LOCAL_SRC_FILES := \
     selinux/libsepol/cil/src/cil_write_ast.c
 
 LOCAL_CFLAGS := -Wno-unused-but-set-variable
+ifeq ($(TARGET_ARCH),riscv64)
+LOCAL_CFLAGS += -DHAVE_REALLOCARRAY
+endif
 include $(BUILD_STATIC_LIBRARY)
 
 # libselinux.a

scripts/avd_magisk.sh

@@ -58,7 +58,7 @@ for file in lib*.so; do
   mv "$file" "${file:3:${#file}-6}"
 done
 
-if $IS64BIT; then
+if [ -e "/system/bin/linker" ]; then
   unzip -oj magisk.apk "lib/$ABI32/libmagisk.so"
   mv libmagisk.so magisk32
   chmod 755 magisk32

scripts/util_functions.sh

@@ -494,11 +494,7 @@ remove_system_su() {
 api_level_arch_detect() {
   API=$(grep_get_prop ro.build.version.sdk)
   ABI=$(grep_get_prop ro.product.cpu.abi)
-  if [ "$ABI" = "x86" ]; then
-    ARCH=x86
-    ABI32=x86
-    IS64BIT=false
-  elif [ "$ABI" = "arm64-v8a" ]; then
+  if [ "$ABI" = "arm64-v8a" ]; then
     ARCH=arm64
     ABI32=armeabi-v7a
     IS64BIT=true
@@ -506,11 +502,18 @@ api_level_arch_detect() {
     ARCH=x64
     ABI32=x86
     IS64BIT=true
-  else
+  elif [ "$ABI" = "armeabi-v7a" ]; then
     ARCH=arm
-    ABI=armeabi-v7a
     ABI32=armeabi-v7a
     IS64BIT=false
+  elif [ "$ABI" = "x86" ]; then
+    ARCH=x86
+    ABI32=x86
+    IS64BIT=false
+  elif [ "$ABI" = "riscv64" ]; then
+    ARCH=riscv64
+    ABI32=riscv32
+    IS64BIT=true
   fi
 }