Weekly edition	Kernel	Security	Distributions	Contact Us	Search
Archives	Calendar	Subscribe	Write for LWN	LWN.net FAQ	Sponsors

GCC and pointer overflows

Posted Apr 16, 2008 22:33 UTC (Wed) by gravious (subscriber, #7662)
In reply to: GCC and pointer overflows by zooko
Parent article: GCC and pointer overflows

How about?

CLEAR_CARRY_FLAG // arch dep macro
temp=x+y
if (CARRY_FLAG_IS_SET) // arch dep macro
    naughty_naughty();

Surely an easy to find out if something WOULD_OVERFLOW is to perform the operation and check
if it DID_OVERFLOW :)

(Log in to post comments)