All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Beulich <jbeulich@novell.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
	jbeulich@novell.com, tglx@linutronix.de, mingo@elte.hu
Subject: [tip:x86/asm] x86-64: move save_paranoid into .kprobes.text
Date: Thu, 12 Mar 2009 11:57:37 GMT	[thread overview]
Message-ID: <tip-c2810188c1b810c68139608a207befae0a4f1e69@git.kernel.org> (raw)
In-Reply-To: <49B8F44F.76E4.0078.0@novell.com>

Commit-ID:  c2810188c1b810c68139608a207befae0a4f1e69
Gitweb:     http://git.kernel.org/tip/c2810188c1b810c68139608a207befae0a4f1e69
Author:     "Jan Beulich" <jbeulich@novell.com>
AuthorDate: Thu, 12 Mar 2009 10:38:55 +0000
Commit:     Ingo Molnar <mingo@elte.hu>
CommitDate: Thu, 12 Mar 2009 11:57:46 +0100

x86-64: move save_paranoid into .kprobes.text

Impact: mark save_paranoid as non-kprobe-able code

This appears to be necessary as the function gets called from
kprobes-unsafe exception handling stubs (i.e. which themselves
live in .kprobes.text).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <49B8F44F.76E4.0078.0@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>


---
 arch/x86/kernel/entry_64.S |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 54866bb..a331ec3 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -368,6 +368,7 @@ ENTRY(save_rest)
 END(save_rest)
 
 /* save complete stack frame */
+	.pushsection .kprobes.text, "ax"
 ENTRY(save_paranoid)
 	XCPT_FRAME 1 RDI+8
 	cld
@@ -396,6 +397,7 @@ ENTRY(save_paranoid)
 1:	ret
 	CFI_ENDPROC
 END(save_paranoid)
+	.popsection
 
 /*
  * A newly forked process directly context switches into this address.

      reply	other threads:[~2009-03-12 11:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-12 10:38 [PATCH] x86-64: move save_paranoid into .kprobes.text Jan Beulich
2009-03-12 11:57 ` Jan Beulich [this message]

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=tip-c2810188c1b810c68139608a207befae0a4f1e69@git.kernel.org \
    --to=jbeulich@novell.com \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-tip-commits@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.