not strictly speaking a kernel question, but i noticed that most
architectures define a macro to generate the current text address
using a local label:
#define current_text_addr() ({ __label__ _l; _l: &&_l;})
now, maybe i'm confused by the syntax, but that looks like what's
being returned by the statement expression is the "address of the
address of _l". is that right? why would you need to use *two*
address-of operators, rather than just one? just curious how this
actually works. thanks.
rday
--
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Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA
http://fsdev.net/wiki/index.php?title=Main_Page
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