5   Consider the following code snippet: .data myVar byte 4, 8, 5, 7 .code mov esi, offset myVar add esi, 2 What is the value at the memory location esi is pointing to? In other words, what value is referenced by [esi]?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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5
 

Consider the following code snippet:

.data
myVar byte 4, 8, 5, 7

.code
mov esi, offset myVar
add esi, 2

What is the value at the memory location esi is pointing to? In other words, what value is referenced by [esi]?

6

Consider the following code snippet:

.data
myArray word 01F2h, 1111h, 0ABDh, AAAAh

.code
mov ebx, offset myArray
add ebx, 2

What is the value at the memory location ebx is pointing to? In other words, what value is referenced by [ebx]?

7

Consider the following code:

.data
array word 1, 2, 3, 4, 5

.code
mov eax, offset array
mov ecx, lengthof array
loopstart:
add byte ptr [eax], 1
add eax, 2
loop loopstart

What are the values in the array after this code is finished executing?

 
 
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In the realm of low-level programming, precise memory management is paramount. Understanding how memory addresses translate to specific values within an array is crucial for accurate data manipulation. In this context, the given code snippet showcases an essential operation: incrementing a memory address and accessing the corresponding array element. By dissecting this process, programmers gain insights into how memory addressing works in assembly language, enabling them to create efficient and reliable code.

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