Date: Tue, 10 Dec 2013 11:39:40 -0800
What does sys_unknown mean and why does it occur? Does it mean that LTTng
cannot find the name of a system call?
Yes. It means the ID of the system call is unknown to LTTng (e.g. kernel
newer than LTTng system call instrumentation).
You can
Date: Tue, 10 Dec 2013 01:55:48 + (UTC)
System calls with compat prefix are for e.g. 32-bit processes running on a
64-bit kernel:
those processes are using a different system call table (ia32 for Intel) than
64-bit processes,
and therefore those system calls are named compat_* by
- Original Message -
From: Daniel Thibault daniel.thiba...@drdc-rddc.gc.ca
To: lttng-dev@lists.lttng.org
Cc: Mathieu Desnoyers mathieu.desnoy...@efficios.com
Sent: Tuesday, December 10, 2013 9:57:21 AM
Subject: Re: [lttng-dev] What are sys calls starting with compat?
Date: Tue, 10
daniel.thiba...@drdc-rddc.gc.ca
Cc: lttng-dev@lists.lttng.org
Subject: Re: [lttng-dev] What are sys calls starting with compat?
Message-ID:
1571110803.82672.1386689479225.javamail.zim...@efficios.com
Content-Type: text/plain; charset=utf-8
- Original Message -
From: Daniel Thibault
- Original Message -
From: Shariyar syed.shari...@gmail.com
To: lttng-dev@lists.lttng.org
Sent: Tuesday, December 10, 2013 2:39:40 PM
Subject: Re: [lttng-dev] What are sys calls starting with compat?
What does sys_unknown mean and why doe it occur? Does it mean that LTTng can
Can someone kindly explain the difference between system calls starting
with compat prefix and regular system calls?
Compat system calls do not appear in the system call table:
http://syscalls.kernelgrok.com/. However, I did found them in the source
code of Linux.
Thanks,
Shariyar
