On 11 July 2011 12:30, Dave Martin <dave.mar...@linaro.org> wrote:
> On Mon, Jul 11, 2011 at 10:42:27AM +0100, Richard Sandiford wrote:
>> Dave Martin <dave.mar...@linaro.org> writes:
>> > IFUNC doesn't solve the problem because either it gets resolved
>> > lazily (violating the above principle (*)), or we have to force _all_
>> > symbols to resolve at startup, with may have a significant impact on
>> > startup time for large programs.
>>
>> IFUNCs are never resolved lazily; that's one way in which they differ
>> from PLTs.
>>
>> (BTW, in response to a comment upthread, ARM does support IFUNCs now.)
>
> Do you know when support was merged in eglibc?
>
> For example, Linaro binutils 2.21.0.20110327-2ubuntu3 appears to support
> IFUNC, but the natty version of eglibc (2.13-0ubuntu13) does not handle
> it correctly.

That's why I didn't try and use it; I thought it was best to wait for
it to percolate through.

Richard's patch went into glibc-ports on April 26th and looks like it
got imported into eglibc-ports
on 5th May (svn rev 13608); there was also a fix from Joseph Myers in that area
on 21st June.

Dave

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