Concepts and Types of Macro Nesting Macro nesting is a powerful code generation technique in assembly language, mainly divided into two forms: Macro Call Nesting: Calling other defined macros within the body of a macro definition Macro Definition Nesting: Defining new macros within the body of a macro definition 1. Macro Call Nesting Technical Features … Read more
Overview of Simplified Segment Definition In assembly language programming, the new version of the assembler provides a method for simplified segment definition, which is more convenient compared to complete segment definitions. The simplified segment definition automatically handles segment attributes through predefined storage models, significantly reducing the burden on programmers. Core Advantages of Simplified Segment Definition: … Read more
Concept and Function of Grouping Grouping (Group) is a technique in assembly language that combines multiple logical segments into a single physical segment, addressing the issue of frequently switching segment registers in the 8086/8088 architecture. Through grouping, programmers can treat multiple logical segments as one large physical segment for access, thereby simplifying code writing and … Read more
Relationship Between Modular Program Structure and Segments In the 8086/8088 architecture, memory is managed in segments. Therefore, when a complex program consists of multiple modules, each module may contain several segments. The linker needs to combine these scattered segments into a final executable program. Basic Concepts of Module Linking: Source Module: Can be written in … Read more
0x00 This article is dedicated to daily learning and note sharing to help everyone learn assembly language. Why learn assembly language? Because in red-blue confrontations, our tools are often detected and killed by some AV/EDR. Therefore, we need to counter AV, which is the evasion technique. To learn evasion techniques, we must start from the … Read more
0x00 This article is dedicated to daily learning and note sharing to help everyone learn assembly language. Why learn assembly language? Because in red-blue confrontations, our tools are often detected and eliminated by AV/EDR systems. Therefore, we need to counter AV, which involves evasion techniques. To learn evasion techniques, we must start from the basics. … Read more
Concept of Modular Programming Design Modular programming design refers to the method of breaking down a large program into multiple independent modules with clear tasks, which are written and debugged separately before being linked together to form a complete program. This approach is particularly important in assembly language development as it effectively manages complexity. Advantages … Read more
1. Evolution of Modular Programming In assembly language development, code reuse techniques have undergone three main stages of development: Source File Inclusion (INCLUDE) – The most basic method of reuse Object Module Linking – Intermediate reuse solution Subroutine Libraries – The most efficient reuse mechanism 2. Comparative Analysis of Three Implementation Methods 2.1 Source File … Read more
1. Basic Concept of Labels In assembly language, a label is a symbolic name used to mark memory addresses. In 8086 assembly, there are two types of labels: Regular Labels: Represents only the address of a memory unit Labels with Unit Length: Represents not only the address but also implicitly includes the length information of … Read more
ret and retf Instructions <span>call</span> and <span>ret</span> are transfer instructions that control the program flow by modifying the IP (Instruction Pointer) or simultaneously modifying both the CS (Code Segment Register) and IP. These instructions are typically used together to implement the design of subroutines (functions). ret Instruction <span>ret</span> (return) instruction pops data from the stack … Read more