dwfl_attach_state alternative taking Ebl?

Mark Wielaard mark@klomp.org
Wed Apr 5 12:46:00 GMT 2017

On Thu, 2017-03-30 at 13:14 +0200, Milian Wolff wrote:
> > OK. How do you know the Elf architecture in that case? How and by what
> > is it given? Is that an EM constant or some architecture string?
> In our case we either get it from perf, or the user specifies it directly on 
> the command line. In both cases it is a string like "x86_64", "arm" or 
> "aarch64". We map that to a list of architectures we know about, see e.g.:
> http://code.qt.io/cgit/qt-creator/perfparser.git/tree/app/
> perfregisterinfo.h#n29
> So, any API that would allow us to map these architectures directly to a dwfl/
> elf counterpart would simplify our code, or at least would make it easier to 
> understand, as we wouldn't have to wait for an Elf file we can open before 
> calling dwfl_attach_state.

So you map from simple architecture name like "x86" or "powerpc". But
what mechanism do you have to whether that is 32 or 64 bit, and big or
little endian?



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