[lug] ABI of RH's 2.96 g++
tromey at redhat.com
Thu Jun 13 19:58:45 MDT 2002
>>>>> ">" == D Stimits <stimits at idcomm.com> writes:
>> I assume that the vtables and issues related to using C++ with dlopen
>> modules would be very close regardless of 2.96 or 3.x documents? It
>> sounds like the 3.x documentation is good for this purpose.
Yes. The vtables and issues should be similar. Be aware that there
is a lot more to the C++ ABI: exception handling, name mangling, and
RTTI at the very least. The 3.x ABI is pretty well defined; there
should be a link from the gcc page to its specification.
[ dwarf-2 ]
>> This probably would not have any effect on the scheme for making
>> C++ work with dlopen modules if using 3.1 docs to figure out how
>> the RH 2.96 g++ and binutils work. Does that sound basically
Yes. I just mentioned that since you said something about being
interested in debugging. But for understanding what is going on,
dwarf-2 won't have any effect.
>> And do you by any chance happen to have a URL for something like a
>> tutorial on g++ internals interacting with dlopen style modules, or
>> general issues such as how vtables are created, and what would
>> break their use across modules?
Nope. I have heard of problems affecting RTTI when you dlopen things
privately, but I haven't really tracked the discussion closely. I'm
not really that heavy of a C++ user these days.
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