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Re: [RFC] Prevent tailcall optimizations of libdl functions

On 01/26/2017 01:35 PM, Szabolcs Nagy wrote:

On 26/01/17 12:15, Florian Weimer wrote:

Maybe we should just change the definition of RTLD_DEFAULT and RTLD_NEXT, to something like this:

#define RTLD_DEFAULT ((void *) ((unsigned long) &__dso_handle | 1)))
#define RTLD_NEXT ((void *) ((unsigned long) &__dso_handle | 3)))


i think these should be constants that can be
copied and passed around between modules.
Why? The effect of these identifies is very much module-specific, and the definition would make this explicit.
What do other libcs do here? Bionic and FreeBSD use magic constants just like current glibc. 

Thanks,
Florian
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