linux-kernel - [RFC][PATCH 0/2] ftrace/x86: Allow for breakpoint handlers to emulate call functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20190501202830.347656894@goodmis.org>
Date:   Wed, 01 May 2019 16:28:30 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     linux-kernel@...r.kernel.org
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [RFC][PATCH 0/2] ftrace/x86: Allow for breakpoint handlers to emulate call functions

I split Peter's patch up into two. One that implements the gap in the
breakpoint handler, and supplies the helper functions. And the other one
that adds ftrace as the user of that code.

Peter, I need an offical "Signed-off-by" from you for these.

I'm currently running them through my full test suite (which will also
test 32bit). If they work I think these may be the final set to go.

Let me know if there's any issues.

-- Steve

Peter Zijlstra (2):
      x86: Allow breakpoints to emulate call functions
      ftrace/x86: Emulate call function while updating in breakpoint handler

----
 arch/x86/entry/entry_32.S            | 11 +++++++++++
 arch/x86/entry/entry_64.S            | 14 ++++++++++++--
 arch/x86/include/asm/text-patching.h | 20 ++++++++++++++++++++
 arch/x86/kernel/ftrace.c             | 25 ++++++++++++++++++++-----
 4 files changed, 63 insertions(+), 7 deletions(-)