dlsym() on implicit loaded symbols

[Roland Dittel]

Am 16.07.2006 um 14:33 schrieb Simon 'corecode' Schubert:

> Roland Dittel wrote:
>>>> We have a issue with dlsym() on symbols imported by a library that 
>>>> was loaded with dlopen(). Our code loads the libssl with dlopen() 
>>>> and then do a dlsym() on several symbols. This works for all 
>>>> symbols exported by libssl itself but fails for symbols exported by 
>>>> libcrypto.
> [..]
>>       func = dlsym(handle, "CRYPTO_set_id_callback");
>
> you have to use RTLD_DEFAULT instead of handle, but I agree, this is 
> not in conformance with SUSv3:

That's it. Thank you very much.

Roland

>
>    The dlsym() function shall search for the named symbol in all 
> objects loaded automatically as a result of loading the object 
> referenced by handle (see dlopen()). Load ordering is used in dlsym() 
> operations upon the global symbol object. The symbol resolution 
> algorithm used shall be dependency order as described in dlopen().
>
>    The RTLD_DEFAULT and RTLD_NEXT flags are reserved for future use.
>
> Note "in all objects loaded automatically".  Good catch!
>
> cheers
>  simon
>
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