FUPK原理圖

要手動調用fupkInvokeMethod

bool DexDumper::fixMethodByDvm(DexSharedData &shared, DexMethod *dexMethod,
                               ClassDefBuilder* builder, u4 &lastIndex) {
    lastIndex = lastIndex + dexMethod->methodIdx;
    auto m = builder->getMethodMap(lastIndex);

    assert(m != nullptr && "Unable to fix MethodBy Dvm, this should happened");

    shared.mCurMethod = dexMethod;
    FupkImpl::fupkInvokeMethod(m);     /////////////////////////////////////////////////
    shared.mCurMethod = nullptr;
    return true;
}

/* @F8LEFT
 * This method is used to export some data for fupk3 to dump dex file.
 * Fupk3 will hook this method and get data from it.
 */
void fupkInvokeMethod(Method* meth) {
    // it is no need to init or link class, the code of the method will
    // not exec actually, so just ignore it
    // anyway, I should make sure this method has code to execute
    if (dvmIsMirandaMethod(meth) || dvmIsAbstractMethod(meth)) {
        return;
    }
    dvmInvokeMethod((Object*)0xF88FF88F, meth, NULL, NULL, NULL, true);
}

dvmInvokeMethod又會調用gFupk.ExportMethod

gFupk.ExportMethod在xposed的框架中加載so的過程中被設置爲fupk_ExportMethod

也就是說，調用fixMethodByDvm 就會跳轉到fupk_ExportMethod(void * thread,Method *method)