Date: Wed, 28 Sep 2005 23:13:22 +0100 From: n0g0013 <ttw@cobbled.net> To: rashmi ns <nsrashmi@gmail.com> Cc: freebsd-hackers@freebsd.org, bugi@lists.redbrick.dcu.ie Subject: Re: [BUGI] IOCTL :Facing problems while acccessing data from kernel space Message-ID: <20050928221322.GB267@eyore.cobbled.net> In-Reply-To: <9f999316050928011010542946@mail.gmail.com> References: <9f999316050928011010542946@mail.gmail.com>
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On 28.09-13:40, rashmi ns wrote: [ ... ] > I was trying to add a new ioctl command like > > #define HDLCMODE _IOR('6',0xF,int) > > when i trying to uprintf the data which was sent from the user-space in > > the device-driver-ioctl-routine i'll get a different value than which was > > passed. Can anybody please tell me why this is happening . I pass the > > address of an integer where data is stored from the user space as third arg > > to the ioctl call . i would guess that it's a simple typo and your pointer conversions are off somewhere. i.e. uprintf( "%d", (int*)data ) ; instead of uprintf( "%d", *(int*)data ) ; otherwise, use a debugger or post the code. -- t t w
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