On Thursday 05 April 2007 07:36, Michael Van Canneyt wrote: > On Thu, 5 Apr 2007, Bisma Jayadi wrote: > > Writing device driver for windows using Delphi is almost impossible > > since Delphi can't produce .sys files. Is it the same case for FPC? > > Can FPC produce .sys file and write device drivers for any OSes > > (not just windows)? TIA. > > Well. FPC can be used to write an operating system, so writing a > device driver is in theory possible. > > Mostly, this would mean writing an RTL which runs inside a kernel, > which means writing routines to handle IO and routines to handle > memory management from the kernel interfaces.
And it would mean writing a C to Pascal conversion of an ever changing kernel interface. > I think for Unix-type interfaces that would be enough. No. Especially with a Linux 2.6 kernel where you are supposed to link with some "kernel object" file and an ever changing binary interface mostly defined as C-macros. At least you need an additional C-wrapper or you're really lost. > For Windows, > there is the additional problem of producing a .sys file, which would > mean some changes to the internal linker. In which way are they special? I don't have a working "objdump" here, so I can't say in which they are different from the "normal" executable files on Windows. I mean, they're still called .sys but other than in the old DOS-days they're also PE-executables or whatever they're called. ;) Vinzent. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
