ANSI C: force malloc to return address with specific range.

Neuzen · 01-04-2009, 08:19 AM

Hi everyone,

I'm looking for a way to force malloc() to return address in a specific range (say 0x80000 or something else), in addition I need a way to mask the addresses returned from malloc to be divided by 32.

Anyone got any idea how to do it?

Thanks for your help.
Neuzen.

foobar · 01-04-2009, 08:29 AM

You can not do this using ansi C. You could try using mmap.

Mara · 01-04-2009, 03:14 PM

You may write your own wrapper to malloc. Inside simply malloc more (+32 octets for instance) and return the pointer that fits the goal. You'll have your own free(), calloc() and other stuff if you use it.