Page 46 - ARM 64 Bit Assembly Language

Introduction 29

.
FFFFFFFFFFFFFFFF . .

Stack

Currently
Unused

Heap

Uninitialized Data
.bss
Read Only Data
.rodata

Initialized Data
.data

Program Code
.text
.
0000000000000000 . .

Figure 1.7: Typical memory layout for a program with a 32-bit address space.

program memory correspond to executable code, statically allocated variables, dynamically
allocated variables, and automatically allocated variables.

1.5 Chapter summary

There are several reasons for Computer Scientists and Computer Engineers to learn at least
one assembly language. There are programming tasks that can only be performed using as-
sembly language, and some tasks can be written to run much more efficiently and/or quickly
if written in assembly language. Programmers with assembly language experience tend to
write better code even when using a high-level language, and are usually better at finding and
fixing bugs.
Although it is possible to construct a computer capable of performing arithmetic in any base,
it is much cheaper to build one that works in base two. It is relatively easy to build an electri-