Hi

I’ve been working on getting Valgrind to work again on FreeBSD.

Probably the biggest problem at the moment is that Valgrind doesn’t (yet) 
handle the read-only program headers.

If I run “readelf -l libc++.so.1.0” on Linux I see two LOAD headers, the first 
one “R E” (read-execute) and the second one “RW” (read-write). If I do the same 
on FreeBSD then I see a third program header which is “R” (read-only), before 
the other two.

My questions are
- Does anyone know when this extra header was added? (I assume that it was 
added sometime in the past 5 years or so)
- What is in these segments, and is it safe to assume that multiple shared 
libraries can map the same RO content to the same address?

A+
Paul
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