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Using a JTAG in Linux Driver Debugging - page 46 / 48

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04/16/2008 - Copyright © 2008 The PTR Group Inc.

CELF-2008-SVC-46

JTAG Confusion

JTAGs normally run in what is called halt mode debugging

The entire processor is stopped when a given breakpoint address is accessed

This works reasonably well in kernel space

Only one kernel address space

While it is possible to debug user applications with the JTAG, the JTAG can get confused by seeing the same virtual address in different applications due to context switches

This requires run mode support for the JTAG

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