[LLVMbugs] [Bug 19301] New: Missing kernel intrinsics

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Apr 1 11:58:11 PDT 2014


            Bug ID: 19301
           Summary: Missing kernel intrinsics
           Product: clang
           Version: 3.4
          Hardware: PC
                OS: Windows XP
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: sgraf at resolutech.net
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 12316
  --> http://llvm.org/bugs/attachment.cgi?id=12316&action=edit
An example driver and build batch files that has tests for the three intrinsics

The following kernel mode only intrinsics appear to be incomplete:

* __readmsr
* __readcr3
* __writecr3

I am attaching the device driver I augmented in order to test these intrinsics.
 We used Visual Studio 2010 and LLVM 3.4 and Clang 3.4 for our testing.  We
were using the intrin.h file from r203816.  We are also using the Windows XP
DDK, which can be downloaded from

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