Hi OSR,
I have developed a driver in kernel mode, I need to access the current
system time in my driver
I have called OSAL library in my driver, it is legacy driver .
I need to write a function GetSystemTimeAsFileTime in Kernel mode.
Current it works in user mode,
Kindly let me know how to use and get the current system time in Kernel
mode.
Regards
Kumarjan5
You’re in luck! KeQuerySystemTime in fact returns UTC in 64 bit format, same as GetSystemTimeAsFileTime returns it in FILETIME structure.
Hi grigora,
Thanks a lot!
Regards
Kumarjan5!
On 14-Aug-2014 1:54 AM, wrote:
> You’re in luck! KeQuerySystemTime in fact returns UTC in 64 bit format,
> same as GetSystemTimeAsFileTime returns it in FILETIME structure.
>
> —
> NTDEV is sponsored by OSR
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> http://www.osr.com/seminars
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Hi Grigora,
I have pTime structure which has sec and nsec (nano sec)
I need to populate these structures using current system time in my driver.
Using FILETIME ft in KeQuerySystemTime(&ft) will crash the driver,
(FILETIME structure is defined in windows.h) GetSystemTimeAsFileTime will
cras as I am in kernel mode.
how to use it, I need to return ptime->sec and pTime->nsec after using
KeQuerySystemTime.
I can use Large interger number i.e .LARGE_INTEGER currentsystemtime.
Kindly help me.
Regards,
kumarjan5
On Thu, Aug 14, 2014 at 8:30 AM, Kumar Rao wrote:
> Hi grigora,
>
> Thanks a lot!
>
> Regards
> Kumarjan5!
> On 14-Aug-2014 1:54 AM, wrote:
>
>> You’re in luck! KeQuerySystemTime in fact returns UTC in 64 bit format,
>> same as GetSystemTimeAsFileTime returns it in FILETIME structure.
>>
>> —
>> NTDEV is sponsored by OSR
>>
>> Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
>>
>> OSR is HIRING!! See http://www.osr.com/careers
>>
>> For our schedule of WDF, WDM, debugging and other seminars visit:
>> http://www.osr.com/seminars
>>
>> To unsubscribe, visit the List Server section of OSR Online at
>> http://www.osronline.com/page.cfm?name=ListServer
>>
>
KeQuerySystemTime
“Kumar Rao” wrote in message news:xxxxx@ntdev…
Hi OSR,
I have developed a driver in kernel mode, I need to access the current system time in my driver
I have called OSAL library in my driver, it is legacy driver .
I need to write a function GetSystemTimeAsFileTime in Kernel mode. Current it works in user mode,
Kindly let me know how to use and get the current system time in Kernel mode.
Regards
Kumarjan5
FILETIME is 64bit integer
KeQuerySystemTime uses the same 64bit integer, though not named “FILETIME”
“Kumar Rao” wrote in message news:xxxxx@ntdev…
Hi Grigora,
I have pTime structure which has sec and nsec (nano sec)
I need to populate these structures using current system time in my driver.
Using FILETIME ft in KeQuerySystemTime(&ft) will crash the driver, (FILETIME structure is defined in windows.h) GetSystemTimeAsFileTime will cras as I am in kernel mode.
how to use it, I need to return ptime->sec and pTime->nsec after using KeQuerySystemTime.
I can use Large interger number i.e .LARGE_INTEGER currentsystemtime.
Kindly help me.
Regards,
kumarjan5
On Thu, Aug 14, 2014 at 8:30 AM, Kumar Rao wrote:
Hi grigora,
Thanks a lot!
Regards
Kumarjan5!
On 14-Aug-2014 1:54 AM, wrote:
You’re in luck! KeQuerySystemTime in fact returns UTC in 64 bit format, same as GetSystemTimeAsFileTime returns it in FILETIME structure.
—
NTDEV is sponsored by OSR
Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
OSR is HIRING!! See http://www.osr.com/careers
For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars
To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer
Pls send teh codes
Can also be 64Hz, depends on several factors.
“Kumar Rao” wrote in message news:xxxxx@ntdev…
Thanks. Zhang pei
It worked, what is the windows internal kernel frequency? 100 or 1000 hz. For clock rate
Regards
Kumarjan5
On 14-Aug-2014 5:29 PM, “ZhangPei” wrote:
Confused… If you want to get readable time format in Kernel, use below code:
LARGE_INTEGER st;
TIME_FIELDS tf;
KeQuerySystemTime(&st);
RtlTimeToTimeFields(&st, &tf);
=================
Best Regards!
Zhang Pei
www.yiiyee.cn/blog
From: Kumar Rao
Sent: Thursday, August 14, 2014 5:43 PM
To: Windows System Software Devs Interest List
Hi Grigora,
I have pTime structure which has sec and nsec (nano sec)
I need to populate these structures using current system time in my driver.
Using FILETIME ft in KeQuerySystemTime(&ft) will crash the driver, (FILETIME structure is defined in windows.h) GetSystemTimeAsFileTime will cras as I am in kernel mode.
how to use it, I need to return ptime->sec and pTime->nsec after using KeQuerySystemTime.
I can use Large interger number i.e .LARGE_INTEGER currentsystemtime.
Kindly help me.
Regards,
kumarjan5
On Thu, Aug 14, 2014 at 8:30 AM, Kumar Rao wrote:
Hi grigora,
Thanks a lot!
Regards
Kumarjan5!
On 14-Aug-2014 1:54 AM, wrote:
You’re in luck! KeQuerySystemTime in fact returns UTC in 64 bit format, same as GetSystemTimeAsFileTime returns it in FILETIME structure.
—
NTDEV is sponsored by OSR
Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
OSR is HIRING!! See http://www.osr.com/careers
For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars
To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer
— NTDEV is sponsored by OSR Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev OSR is HIRING!! See http://www.osr.com/careers For our schedule of WDF, WDM, debugging and other seminars visit: http://www.osr.com/seminars To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer
—
NTDEV is sponsored by OSR
Visit the list at: http://www.osronline.com/showlists.cfm?list=ntdev
OSR is HIRING!! See http://www.osr.com/careers
For our schedule of WDF, WDM, debugging and other seminars visit:
http://www.osr.com/seminars
To unsubscribe, visit the List Server section of OSR Online at http://www.osronline.com/page.cfm?name=ListServer