Freaks City

Project Configuration Visual Studio doesn't provide native assembly language support, but you can leverage the Microsoft Macro Assembler (MASM) to write and debug assembly code within your projects. Creating a New Empty Project Launch Visual Studio and create a new empty C++ project Right-click on the project name in Solution Explorer Navigate ...

Function Assembly Patterns int add_values(int a, int b) { return 0; } Assembly implementation follows stack-based parameter passing from right to left, with return values stored in EAX. EBP represents the stack base pointer, while ESP tracks the stack top. Variable Types Global Variables Memory address and size determined during compilati ...

Background After playing several modified Pokémon GBA games, I decided to explore the process of ROM hacking to create a more user-friend experience. Challenges Learning Curve GBA ROM modification presents significant barriers to entry. Key challenges include: Lack of comprehensive tutorials - Most available resources are fragmented across for ...

In the .NET framework, an assembly functions as a self-describing deployment unit executed within an application domain (AppDomain). Before an application can execute, the runtime must load its corresponding assemblies into an AppDomain. The distinction between private and shared assemblies arises from how these units are managed and accessed a ...

Introduction Branching constructs like if-else and switch-case are fundamental control flow structures in C programming. While they appear to execute sequentially from a source code perspective, their actual performance depends heavily on how the compiler translates them to machine instructions. This analysis examines the efficiency of these co ...

x86-64 Register Set and Usage The x86-64 architecture includes 16 general-purpose registers that store 64-bit values. While these register are general-purpose, they follow conventional usage patterns. The registers r8 through r15 were added in the 80386 architecture extension. %rax: Return value register %rbx: Callee-saved register %rcx: 4th f ...

GDT and Segmentation Mechanism At boot, x86 CPUs operate in real mode using segmented addressing: segment register × 16 + offset register yields physical addresses. This legacy approach lacks security features and modern multitasking support. In protected mode, all 32 address lines become active, enabling 4GB physical addressing. Memory segment ...

Program execution can be understood as a series of function calls. Every user-mode process (where user-mode refers to CPU instruction set privilege ring 3, where applications run) corresponds to a call stack structure. When a function finishes executing, it automatically returns to the next instruction of the calling function (via the call inst ...

Function Call Mechanism A fundamental question that often arises: When function A calls function B, how does B know where to return after completion? Consider the following code snippet where main invokes compute. Once compute finishes execution, control must flow back to main's return statement. But these two functions are separate entities—ho ...