Microsoft KB Archive/134988

= Access Violation in glsbCreateAndDuplicateSection API on PowerPC =

Article ID: 134988

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q134988



SYMPTOM
When you install a OpenGL client video driver on your PowerPC computer running Windows NT and you run an OPENGL program, for example, the Windows NT Pipes screen saver, an access violation occurs in the glsbCreateAndDuplicateSection application programming interface (API).



CAUSE
The assembly dispatch stubs for the GL API do not properly save and restore the TOC register when they make their call.

If these stubs are only called from a different module then this code works properly because the other module has code to save and restore the TOC. However, Windows NT makes several GL calls in OPENGL32 itself, such as glFlush and a variety of calls in the wgl font routines, and these calls do not save and restore the TOC because everything is in the same DLL.



RESOLUTION
To correct this problem, install the latest U.S. Service Pack for Windows NT version 3.51.



STATUS
Microsoft has confirmed this to be a problem in Windows NT version 3.51. This problem has been corrected in the latest U.S. Service Pack for Windows NT version 3.51. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt

Keywords: KB134988

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