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Using the eXDI2 Helpers (Windows Embedded CE 6.0)

1/5/2010

eXDI provides a collection of common helper modules that are reusable in any driver. The helper modules are packaged as in-process COM objects.

If you are writing an eXDI driver, you can select helpers to include in your driver on an as-needed basis, minimizing the amount of driver-specific code needed. For example, if you are writing a driver for a hardware probe that does not support data breakpoints, you can use the data breakpoint emulation helper to add that functionality to your design.

The following table describes the helper elements:

Helper Description

Automation

Provides a custom interface re-mapping for automation objects.

Breakpoint step-over and restart (BP SOAR)

Allows the target to transparently resume execution past a breakpoint.

Breakpoint resource optimizer

Allows breakpoint aliasing for separate instances of a breakpoint at the same location.

Data breakpoint emulation

Emulates a data breakpoint when not supported by the underlying hardware.

Exception filtering

Filters exception halt notifications based on user settings.

Memory cache

Caches target memory on the target device while the target is halted.

Memory manipulations

Provides common memory manipulation operations, such as search, copy, compare, and fill, when not supported by the underlying hardware.

Memory map filter

Filters access to memory addresses that are not supported by the underlying hardware.

Notification

Notifies client of debugging events such as memory changes and run-state changes.

In addition, the notification helpers obtain client authorization for restarting execution on the target device.

Single Stepping

Provides single stepping using breakpoints when not available on the underlying hardware.

Most helper modules provide functionalities that can be offered directly in a probe. The helpers use the eXDI memory interface IeXdi2Mem, the execution interfaces IeXdi2Exec, and a specific generic interface, IeXdi2HelperGeneric.

See Also

Concepts

Common External Interfaces

Other Resources

eXDI Driver Development