From: Russell King - ARM Linux
> Sent: 27 November 2018 15:36
...
> There appears to be no documentation at all of this interface, so there
> is no definition of how it is supposed to work or what it is supposed
> to expose beyond what little information is in the original patch:
>
> http://lkml.iu.edu/hypermail/linux/kernel/0807.2/0577.html
>
> This adds /proc/PID/syscall and /proc/PID/task/TID/syscall magic files.
> These use task_current_syscall() to show the task's current system call
> number and argument registers, stack pointer and PC. For a task blocked
> but not in a syscall, the file shows "-1" in place of the syscall number,
> followed by only the SP and PC. For a task that's not blocked, it shows
> "running".
I 'like' the way the columns for sp and pc jump about ...
David
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