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Re: How to add 4K of scratch space at the bottom of the stack using C instead of C++?
- From: "Yu-Cheng Chou" <cycchou at ucdavis dot edu>
- To: cygwin at cygwin dot com
- Date: Mon, 11 Jul 2005 08:42:12 -0700 (PDT)
- Subject: Re: How to add 4K of scratch space at the bottom of the stack using C instead of C++?
> > Hi,
> > In order to dynamically load cygwin1.dll with VC, I need to add 4K of
> > scratch space at the bottom of my stack.
> >
> > The winsup/testsuite/cygload/cygload.cpp shows how to do it using C++.
>
> I believe it's cygload.cc...
>
> > How can I add the scratch space using C rather than C++ in a simplest
> > way?
>
> I'm afraid it won't be very simple, but how about something like
>
> int main(int ac, char *av[]) {
> char padding[4096];
> backup_lower_stack();
>
> ...
>
> restore_lower_stack();
> return ...
> }
>
> with backup_lower_stack() and restore_lower_stack() adapted from the
> cygwin::padding constructor and destructor, respectively (the vector can
> be replaced by a malloc'ed piece of memory).
>
> However, you'll also need to write a C interface to cygwin::connector.
> Once you have this working, I would strongly urge you to submit the code
> to Cygwin.
By the way, the Makefile shows that the MSVC compiler is in
C:/cygwin/usr/local/tools/i686_win32/vc7/Vc7.
Is it a package that is provided by cygwin? Or is it the MSVC software
that is installed in that directory?
Thanks
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