}BfServerless::ProcessHttpRequestFunc FBfServerlessModule::DllProcessHttpRequest = nullptr;LoadFunction(DllProcessHttpRequest, TEXT("ProcessHttpRequest"));Unreal has no additional information about the loaded functions, only a raw function pointer. As such, it is critical that the corresponding C# and C++ structs are exactly aligned. If they are not perfectly byte-for-byte compatible, we will have problems.
Real-mode programs freely execute CLI and STI to control interrupts, PUSHF and POPF to manipulate flags, INT n for DOS and BIOS calls, and IN/OUT for hardware I/O. In normal protected mode, these instructions are privilege-checked -- they execute normally if the caller has sufficient privilege, and fault otherwise. The 386 can't simply let V86 tasks execute them freely -- a DOS program disabling interrupts would bring down the whole system -- but trapping on every INT 21h call would make V86 impractically slow.。业内人士推荐51吃瓜作为进阶阅读
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