From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: "linux-os (Dick Johnson)" <linux-os@analogic.com>,
LKML <linux-kernel@vger.kernel.org>,
Daniel Walker <dwalker@mvista.com>
Subject: Re: [Question] arch-independent way to differentiate between user andkernel
Date: Wed, 3 Aug 2005 14:04:13 +0200 [thread overview]
Message-ID: <20050803120413.GA12317@elte.hu> (raw)
In-Reply-To: <1123069449.1590.93.camel@localhost.localdomain>
* Steven Rostedt <rostedt@goodmis.org> wrote:
> On Wed, 2005-08-03 at 06:56 -0400, linux-os (Dick Johnson) wrote:
> > On Wed, 3 Aug 2005, Steven Rostedt wrote:
> > The interrupt handler gets a pointer to a structure called "struct pt_regs".
> > That contains, amongst other things, the registers pushed onto the stack
> > during the interrupt. If the segments were kernel segments, the interrupt
> > occurred while in kernel mode. But..... If you have any code that
> > needs to know, it's horribly and irreparably broken beyond all
> > repair. Interrupts need to be handled NOW, without regard to what
> > got interrupted.
> >
>
> By the time you get to __do_IRQ there's already more stuff on the
> stack. And the pt_regs is arch specific so this doesn't help.
the actual layout of pt_regs is arch-specific, but user_mode(regs) is
pretty much generic across most arches.
Ingo
next prev parent reply other threads:[~2005-08-03 12:08 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-30 16:03 [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01 Ingo Molnar
2005-07-30 20:47 ` Peter Zijlstra
2005-07-30 20:52 ` Ingo Molnar
2005-07-31 4:47 ` Lee Revell
2005-07-31 6:38 ` Ingo Molnar
2005-08-01 4:45 ` Lee Revell
2005-08-01 21:08 ` Ingo Molnar
2005-08-01 21:12 ` Ingo Molnar
2005-08-02 13:56 ` Steven Rostedt
2005-08-02 14:05 ` Lee Revell
2005-08-02 14:20 ` Steven Rostedt
2005-08-02 15:37 ` 2.6.13-rc3 -> sluggish PS2 keyboard (was Re: [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01) Lee Revell
2005-08-02 15:44 ` Vojtech Pavlik
2005-08-02 15:46 ` Lee Revell
2005-08-02 15:47 ` Lee Revell
2005-08-02 15:53 ` Steven Rostedt
2005-08-02 15:55 ` Vojtech Pavlik
2005-08-02 15:55 ` Dmitry Torokhov
2005-08-02 15:38 ` [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01 Lee Revell
2005-07-31 8:03 ` Peter Zijlstra
2005-07-31 10:44 ` Ingo Molnar
2005-07-31 15:56 ` [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-05 Gene Heskett
2005-08-01 18:22 ` [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01 Steven Rostedt
2005-08-01 19:49 ` Steven Rostedt
2005-08-01 20:52 ` Ingo Molnar
2005-08-01 21:09 ` Daniel Walker
2005-08-01 21:15 ` Ingo Molnar
2005-08-02 0:43 ` Steven Rostedt
2005-08-01 21:15 ` Steven Rostedt
2005-08-01 21:23 ` Ingo Molnar
2005-08-01 21:20 ` Daniel Walker
2005-08-02 0:53 ` Steven Rostedt
2005-08-02 10:19 ` Ingo Molnar
2005-08-02 19:45 ` Steven Rostedt
2005-08-02 19:56 ` Steven Rostedt
2005-08-02 23:38 ` Daniel Walker
2005-08-03 0:00 ` Steven Rostedt
2005-08-03 1:12 ` George Anzinger
2005-08-03 1:48 ` Keith Owens
2005-08-03 2:12 ` George Anzinger
2005-08-03 2:25 ` Daniel Walker
2005-08-03 2:42 ` Steven Rostedt
2005-08-03 2:58 ` Daniel Walker
2005-08-03 10:30 ` Steven Rostedt
2005-08-03 15:10 ` Daniel Walker
2005-08-03 10:37 ` [Question] arch-independent way to differentiate between user and kernel Steven Rostedt
2005-08-03 10:48 ` Ingo Molnar
2005-08-03 12:18 ` Steven Rostedt
2005-08-03 10:56 ` [Question] arch-independent way to differentiate between user andkernel linux-os (Dick Johnson)
2005-08-03 11:44 ` Steven Rostedt
2005-08-03 12:04 ` Ingo Molnar [this message]
2005-08-03 12:30 ` Steven Rostedt
2005-08-03 14:50 ` [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01 Steven Rostedt
2005-08-03 15:15 ` Steven Rostedt
2005-08-03 15:57 ` Steven Rostedt
2005-08-03 16:44 ` Steven Rostedt
[not found] ` <20050812125844.GA13357@elte.hu>
2005-08-26 4:24 ` Steven Rostedt
2005-08-26 6:08 ` Ingo Molnar
2005-08-26 11:20 ` Steven Rostedt
2005-08-30 10:58 ` Stephen C. Tweedie
2005-08-30 11:14 ` Ingo Molnar
2005-08-30 11:00 ` Stephen C. Tweedie
2005-08-02 3:55 ` Steven Rostedt
2005-08-02 4:07 ` Daniel Walker
2005-08-02 14:53 ` Steven Rostedt
2005-08-04 12:20 ` Andrzej Nowak
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050803120413.GA12317@elte.hu \
--to=mingo@elte.hu \
--cc=dwalker@mvista.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-os@analogic.com \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox