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Re: [PATCH] ld/ld.texinfo: Do not constrain dynamic linker lazy binding behaviour.


Florian Weimer <fweimer@redhat.com> writes:

> On 07/08/2016 02:28 PM, Andreas Schwab wrote:
>> Florian Weimer <fweimer@redhat.com> writes:
>>
>>> On 07/08/2016 03:44 AM, Carlos O'Donell wrote:
>>>>  @item lazy
>>>>  When generating an executable or shared library, mark it to tell the
>>>> -dynamic linker to defer function call resolution to the point when
>>>> -the function is called (lazy binding), rather than at load time.
>>>> -Lazy binding is the default.
>>>> +dynamic linker to defer function call resolution to a future time
>>>> +which may be as late as when the function is called (lazy binding),
>>>> +rather than at load time.  Resolution functions for GNU indirect
>>>> +functions (STT_GNU_IFUNC) may be called one or more times during
>>>> +function call resolution.  Lazy binding is the default.
>>>
>>> This implies that IFUNC resolver invocations are delayed as late as
>>> possible (right until a function call which needs the relocation).  Is
>>> this something we want to guarantee?
>>
>> The text says "may", so I don't see any guarantee.
>
> The “during function call resolution” part concerns me.

May be called.  Or any other time.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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