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Date:   Fri, 3 May 2019 18:32:55 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     Andy Lutomirski <luto@amacapital.net>
Cc:     Steven Rostedt <rostedt@goodmis.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.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>,
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        Mimi Zohar <zohar@linux.ibm.com>,
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        <linux-kselftest@vger.kernel.org>, stable <stable@vger.kernel.org>
Subject: Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions
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On Fri, May 03, 2019 at 09:20:55AM -0700, Andy Lutomirski wrote:
> > On May 3, 2019, at 6:22 AM, Steven Rostedt <rostedt@goodmis.org> wrote:
> > 
> > On Fri, 3 May 2019 11:29:59 +0200
> > Peter Zijlstra <peterz@infradead.org> wrote:
> > 
> > 
> >> OMG, WTF, ARGH... That code is fsck'ing horrible. I'd almost argue to
> >> always do the INT3 thing, just to avoid games like that.

> So here’s a somewhat nutty suggestion: how about we tweak the 32-bit
> entry code to emulate the sane 64-bit frame, not just for int3 but
> always? 

Basically what I wrote above, right? I'd be fine with that... Linus?