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Mastering Assembly Programming

You're reading from  Mastering Assembly Programming

Product type Book
Published in Sep 2017
Publisher Packt
ISBN-13 9781787287488
Pages 290 pages
Edition 1st Edition
Languages
Author (1):
Alexey Lyashko Alexey Lyashko
Profile icon Alexey Lyashko

Structures

As a developer, I believe you would agree that most of the time we are not working with arrays of uniform data (I am definitely not underestimating the power of a regular array). Since data may be anything, starting with 8-bit numbers and ending with complex structures, we need a way to describe such data for the assembler, and the term structure is the key. Flat Assembler, just as any other assembler, lets us declare structures and treat them as additional types of data (similar to the typedef struct in C).

Let's declare a simple structure, an entry of a string table, and then see what is what:

struc strtabentry [s]
{
.length dw .pad - .string ; Length of the string
.string db s, 0 ; Bytes of the string
.pad rb 30 - (.pad - .string) ; Padding to fill 30 bytes
.size = $ - .length ; Size of the structure (valid...
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