1.1.5. Trace compression

The trace produced by the PTM is compressed to reduce the number of additional pins required on the ASIC, or to reduce the amount of memory required by the ETB.

The trace is compressed using the following techniques:


For the debugger to be able to decode the trace, you must supply a static image of the code being executed. Self-modifying code cannot be traced because of this restriction.

Copyright © 1999-2002, 2004-2008, 2011 ARM. All rights reserved.ARM IHI 0035B