Re: Wrapping code

[Paul Brook <paul@codesourcery.com>]

> It is possible. Nothing is impossible. But it is also quite stupid.
> 
> You would need a very god reason, like you get paid for it, to do this.

You'd also need a good reason why you couldn't just buy the original source. 
It's almost certainly cheaper than trying to wedge the existing library into 
a 64-bit executable.

> > If it's possible, how I can do that? rewriting the headers and a cpp code
> > calling the library functions? and the compiler, have I to make some
> > special flag? can I reuse a .so as a .a?
> >
> > This idea could help to the people that have devices that have libraries
> > to develop with them but not the source code and for example want to
> > change of distro or upgrade an a amd64. Of course that if the library is
> > compiled in a 32 bits it will be 32 bit, but it's possible to mix 64bit
> > and 32bits code?
>
> You need a library that mmaps the old library into a 32bit address

You also need to manually perform dynamic linking after loading the library, 
and provide thinks for all the C library functions used by the library. 
Potentially also intercept syscalls and translate those.

Paul