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From: Douglas Miller <dougmill@linux.vnet.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: powerpc/xmon: Add xmon command to dump process/task similar to ps(1)
Date: Mon, 23 Nov 2015 09:01:14 -0600
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    Add 'P' command with optional task_struct address to dump all/one task's
    information: task pointer, kernel stack pointer, PID, PPID, state
    (interpreted), CPU where (last) running, and command.
    
    Introduce XMON_PROTECT macro to standardize memory-access-fault
    protection (setjmp). Initially used only by the 'P' command.