From: Linus Torvalds <torvalds@linux-foundation.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Nicolai Stange <nstange@suse.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"the arch/x86 maintainers" <x86@kernel.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Jiri Kosina <jikos@kernel.org>, Miroslav Benes <mbenes@suse.cz>,
Petr Mladek <pmladek@suse.com>,
Joe Lawrence <joe.lawrence@redhat.com>,
Shuah Khan <shuah@kernel.org>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Mimi Zohar <zohar@linux.ibm.com>, Juergen Gross <jgross@suse.com>,
Nick Desaulniers <ndesaulniers@google.com>,
Nayna Jain <nayna@linux.ibm.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Joerg Roedel <jroedel@suse.de>,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
live-patching@vger.kernel.org,
"open list:KERNEL SELFTEST FRAMEWORK"
<linux-kselftest@vger.kernel.org>
Subject: Re: [RFC][PATCH v3] ftrace/x86_64: Emulate call function while updating in breakpoint handler
Date: Wed, 1 May 2019 11:59:05 -0700 [thread overview]
Message-ID: <CAHk-=wgMZJeMCW5MA25WFJZeYYWCOWr0nGaHhJ7kg+zsu5FY_A@mail.gmail.com> (raw)
In-Reply-To: <20190501145200.6c095d7f@oasis.local.home>
On Wed, May 1, 2019 at 11:52 AM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> I got Peter's patch working. Here it is. What do you think?
I can tell from just looking at it for five seconds that at least the
32-bit case is buggy.
You can't look at CS(%rsp) without first also checking that you're not
coming from vm86 mode.
But other than that I guess it does end up being pretty simple.
Linus
next prev parent reply other threads:[~2019-05-01 19:06 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-01 15:32 [RFC][PATCH v3] ftrace/x86_64: Emulate call function while updating in breakpoint handler Steven Rostedt
2019-05-01 18:01 ` Linus Torvalds
2019-05-01 18:52 ` Steven Rostedt
2019-05-01 18:59 ` Linus Torvalds [this message]
2019-05-01 19:17 ` Peter Zijlstra
2019-05-01 19:36 ` Linus Torvalds
2019-05-01 18:57 ` Peter Zijlstra
2019-05-01 19:00 ` Steven Rostedt
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