https://sourceware.org/bugzilla/show_bug.cgi?id=23169

--- Comment #9 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Fangrui Song from comment #8)
> Can https://sourceware.org/glibc/wiki/GNU_IFUNC to updated to document what
> is supported and what isn't supported?
> 

IFUNC documentation needs improvements.

> 
> Is the idea that
> (1) the main executable is relocated the last.
> (2) by making the main executable STT_GNU_IFUNC STT_FUNC, ifunc resolver
> will not be called while the main executable is unresolved

Correct.

> (3) How does an ifunc resolver defined in another DSO work? Let the user
> ensures DT_NEEDED BFS order or the ld.so itself does topological sorting?

Current ld.so issues an error with a suggestion when it detects it.

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