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Re: [PATCH v2] [BZ #10283] localedef: align fixed maps to SHMLBA


On 05/29/2013 03:46 AM, Andreas Schwab wrote:
> "Carlos O'Donell" <carlos@redhat.com> writes:
> 
>> http://pubs.opengroup.org/onlinepubs/9699919799/functions/mmap.html
>> ~~~
>> If MAP_FIXED is specified, the implementation may 
>> require that addr is a multiple of the page size.
>> ~~~
>> Thus addr must be aligned to N*<page size>, where N is implementation
>> specific.
> 
> That does not follow from here.  The important bits are here:
> 
>     The mmap() function may fail if:
>     [EINVAL]
>     The addr argument (if MAP_FIXED was specified) or off is not a
>     multiple of the page size as returned by sysconf(), or is considered
>                                                               ^^^^^^^^^^
>     invalid by the implementation.
>     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Are you saying that the definition of the error implies
that *any* value is allowed for addr and may be at any
time rejected by the implementation?

Cheers,
Carlos.


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