linux-kernel - [PATCH v3 00/15] uprobes/x86: fix the handling of relative jmp's/call's

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Date:	Sun, 13 Apr 2014 19:45:08 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anton Arapov <aarapov@...hat.com>,
	David Long <dave.long@...aro.org>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Jonathan Lebon <jlebon@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 00/15] uprobes/x86: fix the handling of relative
	jmp's/call's

Hello.

OK, let me resend everything. This is what I am going to add to my tree
and ask Ingo to pull. I am still testing this all, seems to work so far.

Changes:

	01-09: No changes, added the acks from Masami.

	09-15: Updated the changelogs, the comments in 13/15, plus the
	       following renames:

	       - s/ttt/branch/

	       - s/disp/offs/

	       - s/_clear_displacement/_clear_offset/

	       No changes in compiled code, I preserved the acks from Jim.

>From 13/15:

	Note: as Denys Vlasenko pointed out, amd and intel treat "callw" (0x66 0xe8)
	differently. This patch relies on lib/insn.c and thus implements the intel's
	behaviour: 0x66 is simply ignored. Fortunately nothing sane should ever use
	this insn, so we postpone the fix until we decide what should we do; emulate
	or not, support or not, etc.

Yes. Lets discuss (and fix?) this separately, I'll write another email.

Any objections?

Oleg.

 arch/x86/include/asm/uprobes.h |   16 +-
 arch/x86/kernel/uprobes.c      |  551 +++++++++++++++++++++++++---------------
 kernel/events/uprobes.c        |   31 +--
 3 files changed, 372 insertions(+), 226 deletions(-)

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