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FIX: When you run an application that generates a floating-point exception that is compiled by using the /QRfpe command option on a Windows Embedded CE 6.0-based device, you may receive an exception message

Article ID: 960413 - View products that this article applies to.

SYMPTOMS

You have a Windows Embedded CE 6.0-based device that has an ARM1136 processor that includes a Vector Floating-Point (VFP) coprocessor. On the device, you compile a project that generates a floating-point exception by using the /QRfpe command option. When you run the application, you may receive an exception message that resembles the following:

ExceptionAddress: 41942898 (rtmpltfm!EStreamFromRtpInfo+0x00000400)
ExceptionCode: c000001d (Illegal instruction)
ExceptionFlags: 00000001

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CAUSE

This problem occurs because the VFP coprocessor is initiated into a mode that requires the operating system's support to handle floating-point exceptions. By default, this kind of support is not included in Windows Embedded CE 6.0.

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RESOLUTION

Software update information

A supported software update is now available from Microsoft as Windows CE 6.0 Platform Builder Monthly Update (December 2008). You can confirm this by scrolling to the "File information" section of this article. The package file name contains the product version, date, Knowledge Base article number, and processor type. The package file name format is:

Product version-yymmdd-kbnnnnnn-processor type

For example: Wincepb50-060503-kb917590-armv4i.msi is the ARMV4i Windows CE 5.0 Platform Builder fix that is documented in KB article 917590 and that is contained in the May 2006 monthly update. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392

(http://support.microsoft.com/kb/837392/ )

How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Note After you apply the hotfix, the VFP coprocessor is initiated into the RunFast mode that does not require the operating system's support.

Prerequisites

This update is supported only if all previously issued updates for this product have also been installed.

Restart requirement

After you apply this software update, you must perform a clean build of the whole platform. To do this, use one of the following methods:

On the Build menu, click Clean, and then click Build Platform.
On the Build menu, click Rebuild Platform.

You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this software update package has the file attributes or the later file attributes that are listed in the following table.

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File name	File size	Date	Time
Wincepb60-081204-kb960413- armv4i.msi	3,466,240	05-Dec-2008	01:35

The English version of this software update package has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

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File name	File size	Date	Time	Path
Mdarm.c	38,582	24- Nov-2008	23:02	\private\winceos\coreos\nk\kernel\arm
Nkmain.lib	2,722,382	24-Nov- 2008	22:58	\public\common\oak\lib\armv4i\debug
Nkprmain.lib	2,759,282	24-Nov- 2008	22:58	\public\common\oak\lib\armv4i\debug
Nkmain.lib	1,756,444	24-Nov- 2008	22:58	\public\common\oak\lib\armv4i\debug
Nkprmain.lib	1,781,938	24-Nov- 2008	22:58	\public\common\oak\lib\armv4i\debug

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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MORE INFORMATION

For more information about the /QRfpe command option, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn.microsoft.com/en-us/library/bb552256.aspx

(http://msdn.microsoft.com/en-us/library/bb552256.aspx)

For more information about the VFP coprocessor, visit the following ARM Web site:

http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0211i/Cegdejjh.html

(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0211i/Cegdejjh.html)

Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684

(http://support.microsoft.com/kb/824684/LN/ )

Description of the standard terminology that is used to describe Microsoft software updates

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