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[S390] add breaking event address for user space
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Mon, 17 May 2010 08:00:05 +0000 (10:00 +0200)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Mon, 17 May 2010 08:00:15 +0000 (10:00 +0200)
Copy the last breaking event address from the lowcore to a new
field in the thread_struct on each system entry. Add a new
ptrace request PTRACE_GET_LAST_BREAK and a new utrace regset
REGSET_LAST_BREAK to query the last breaking event.

This is useful for debugging wild branches in user space code.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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