October 2002
Intermediate to advanced
430 pages
14h 57m
English
Content preview from Embedded Systems Design, 2nd Edition
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Embedded processors 19
System integrity
Another disadvantage with this type of architecture is its
unpredictability in handling error conditions. A bug in a software
application could corrupt the whole system, causing a system to
either crash, hang up or, even worse, perform some unforeseen
operations. The reasons are quite simple: there is no partitioning
between data and programs within the architecture. An applica-
tion can update a data structure using a corrupt index pointer
which overwrites a part of its program.
start
finish
Address
pointer
New
data
start
finish
System
memory
Addre
ss
pointe
r
System
Memory
Ne
w
d
a
ta
Valid pointer
address
Invalid pointer
address
System ...
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