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An In-Depth Understanding of Memory and Pointers in C

Function Pointers and Regular Pointers

Explore how function pointers differ from regular pointers in C. Understand that function pointers point to read-only code memory, why writing to them is prohibited, and how function names act as addresses. Learn to call functions using pointers efficiently.

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Introduction

There are a lot of similarities between function pointers and pointers to variables. However, function pointers have a few particularities, which we’ll now discuss.

Function pointers are read-only

Function pointers point inside the .text section, which should get mapped in a read-only memory area. As stated previously, it helps protect against code injection attacks. Moreover, it wouldn’t make ...