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On Tue, Feb 19, 2008 at 4:05 AM, Corinna Vinschen <corinna-cygwin@cygwin.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.
Attachment:
ioperm-port-range-patch
Description: Binary data
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