Messages in this thread | | | Subject | Re: shmat problem | From | Doug McNaught <> | Date | 06 Jan 2003 09:17:52 -0500 |
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"Dirk Bull" <dirkbull102@hotmail.com> writes:
> I have a problem with the shmat() function. It works correctly when > one doesn't specify an address where the segment should be attached, > but fails when one does. To specify an address it must be alligned > and I did by using __attribute__ (aligned()). Still the function > fails. What is the most effective way for a solution > to this problem.
__attribute__(aligned()) has nothing to do with it--the address needs to be page-aligned (ie on a multiple of 4K for ix86), unless SHM_RND is set in the call. You also need to make sure nothing else is mapped at the address you're trying to use...
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