Kernel Image Libraries
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8/27/2008
The OAL is physically a part of the kernel image, and as such, is tightly coupled to the kernel build process. The requisite build and configuration directories and files are put in place to create a kernel image from the OAL as it is progressively developed. Microsoft provides the kernel code for the microprocessor of the target device.
The following table shows the requisite libraries that make up the kernel image.
| Library | Description |
|---|---|
Nk.lib |
Base code supplied by Microsoft for a specified microprocessor. |
NkProf.lib |
Profile version of the microprocessor-specific kernel code that Microsoft supplies with the Platform Builder integrated development environment (IDE). Optional. |
KITL.lib |
Kernel Independent Transport Layer (KITL) debugging services. Optional if KITL is not required. |
FullLibc.lib |
Microsoft C Run-Time Library for Windows Embedded CE. |
Platform Builder ships OAL code that builds three different kernel libraries. Each is customized for a particular task and is described in the following table.
| Kernel type | Description |
|---|---|
Kern.exe |
Kernel that does not include the debugging subsystem. |
Kernkitl.exe |
Kernel that includes the KITL subsystem. |
Kernkitlprof.exe |
Kernel that includes profiling and KITL. |
For more information about debugging and profiling, see Diagnostics and Debugging for Mobile and Embedded Development and Tools for Performance Tuning.
The following table shows the libraries necessary to build these versions of the kernel.
| Library | Included in Kern.exe | Included in Kernkitl.exe |
|---|---|---|
Nk.lib |
X |
X |
NkProf.lib |
|
|
FullLibc.lib |
X |
X |
KITL.lib |
|
X |
When the IMGNODEBUGGER environment variable is not set, the kernel debugger is included as part of the kernel image and the kernel debugger runs as soon as the image boots.
The following additional files are added to the kernel image when IMGNODEBUGGER is not set:
- Kd.dll
- Hd.dll
- Osaxst0.dll
- Osaxst1.dll