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Date:	Wed, 26 Mar 2008 13:49:41 -0500
From:	"Andrew Dyer" <amdyer AT gmail DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Looking for ioperm maintainer (was Re: ioperm() with ports above 0x3ff)
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On Tue, Feb 19, 2008 at 4:05 AM, Corinna Vinschen
<corinna-cygwin AT cygwin DOT com> wrote:
> On Feb 18 21:15, Andrew Dyer wrote:
>  > I am having problems using ioperm() to try and access a parallel printer port on
>  > a PCI card in my system running WinXP.  The port is mapped to I/O port address
>  > 0xDCD8.  I cannot access the port because the ioperm() driver has a check to
>  > limit I/O port accesses to < 0x400.
>  >
>  > from /usr/src/ioperm-0.4/driver/ioperm.c, lines 95-100
>  >
>  >               /* test input buffer size and parameters */
>  >               if ((io_stack->Parameters.DeviceIoControl.InputBufferLength < sizeof (struct
>  > ioperm_data))
>  >                       || (!ioperm_data) || (ioperm_data->from + ioperm_data->num > 0x400))
>  >               {
>  >                       Irp->IoStatus.Status = STATUS_INVALID_PARAMETER;
>  >               } else {
>  > [...]
>  > I can't rebuild the driver as I don't have access to the DDK.  Can someone
>
>  The necessary ddk files are part of the w32api package in the Cygwin
>  distro.  You don't have to install the Microsoft DDK package.
>
>  > rebuild it with the check modified so I could test it?
>
>  The ioperm package has no maintainer anymore since 2006.  If anybody
>  feels that maintaining ioperm would be something they could consider as
>  a fun side job, just read http://cygwin.com/setup.html and follow the
>  instructions.
>

Attached is a patch that fixes this issue for me.

-- 
Hardware, n.:
 The parts of a computer system that can be kicked.

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