mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: "Randy.Dunlap" <rddunlap@osdl.org>
To: lkml <linux-kernel@vger.kernel.org>
Subject: asm (lidt) question
Date: Thu, 17 Jul 2003 15:28:19 -0700	[thread overview]
Message-ID: <20030717152819.66cfdbaf.rddunlap@osdl.org> (raw)


In arch/i386/kernel, inline asm for loading IDT (lidt) is used a few
times, but with slightly different constraints and output/input
definitions.  Are these OK, equivalent, or what?

[rddunlap@dragon kernel]$ findc lidt
./cpu/common.c:484: __asm__ __volatile__("lidt %0": "=m" (idt_descr));
./traps.c:783:	__asm__ __volatile__("lidt %0": "=m" (idt_descr));

vs.

./reboot.c:186:	__asm__ __volatile__ ("lidt %0" : : "m" (real_mode_idt));
./reboot.c:261:	__asm__ __volatile__("lidt %0": :"m" (no_idt));
./suspend.c:95:	asm volatile ("lidt %0" :: "m" (saved_context.idt_limit));


Thanks,
--
~Randy  [yes, i've looked at the inline asm docs]
For Linux-2.6:
http://www.codemonkey.org.uk/post-halloween-2.5.txt
  or http://lwn.net/Articles/39901/
http://www.kernel.org/pub/linux/kernel/people/rusty/modules/

             reply	other threads:[~2003-07-17 22:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-17 22:28 Randy.Dunlap [this message]
2003-07-17 22:36 ` Davide Libenzi
2003-07-17 23:18   ` Davide Libenzi
2003-07-17 23:31     ` Randy.Dunlap
2003-07-17 23:36       ` Davide Libenzi
2003-07-22 17:27     ` Jamie Lokier
2003-07-22 17:31       ` Davide Libenzi
2003-07-22 17:50         ` Richard B. Johnson
2003-07-22 17:54           ` Davide Libenzi
2003-07-22 18:58         ` Randy.Dunlap
2003-07-22 18:58           ` Davide Libenzi
2003-07-22 19:04             ` Randy.Dunlap

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=20030717152819.66cfdbaf.rddunlap@osdl.org \
    --to=rddunlap@osdl.org \
    --cc=linux-kernel@vger.kernel.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
all inboxes | Powered by JetHome®