From mboxrd@z Thu Jan  1 00:00:00 1970
From: torvalds at linux-foundation.org (Linus Torvalds)
Date: Mon, 6 May 2019 11:06:51 -0700
Subject: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions
In-Reply-To: <20190506130643.62c35eeb@gandalf.local.home>
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On Mon, May 6, 2019 at 10:06 AM Steven Rostedt <rostedt at goodmis.org> wrote:
>
> Can you try booting with:
> [ snip snip ]
>
> And see if it boots?

No it doesn't.

Dang, I tried to figure out what's up, but now I really have to start
handling all the puill requests..

I thought it might be an int3 that happens on the entry stack, but I
don't think that should ever happen. Either it's a user-mode int3, or
we're in the kernel and have switched stacks. So I still don't see why
my patch doesn't work, but now I have no time to debug it.

                   Linus

From mboxrd@z Thu Jan  1 00:00:00 1970
From: torvalds@linux-foundation.org (Linus Torvalds)
Date: Mon, 6 May 2019 11:06:51 -0700
Subject: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call functions
In-Reply-To: <20190506130643.62c35eeb@gandalf.local.home>
References: <20190502181811.GY2623@hirez.programming.kicks-ass.net>
 <CAHk-=wi6A9tgw=kkPh5Ywqt687VvsVEjYXVkAnq0jpt0u0tk6g@mail.gmail.com>
 <20190502202146.GZ2623@hirez.programming.kicks-ass.net>
 <20190502185225.0cdfc8bc@gandalf.local.home>
 <20190502193129.664c5b2e@gandalf.local.home>
 <20190502195052.0af473cf@gandalf.local.home>
 <20190503092959.GB2623@hirez.programming.kicks-ass.net>
 <20190503092247.20cc1ff0@gandalf.local.home>
 <2045370D-38D8-406C-9E94-C1D483E232C9@amacapital.net>
 <CAHk-=wjrOLqBG1qe9C3T=fLN0m=78FgNOGOEL22gU=+Pw6Mu9Q@mail.gmail.com>
 <20190506081951.GJ2606@hirez.programming.kicks-ass.net>
 <20190506095631.6f71ad7c@gandalf.local.home>
 <CAHk-=wgw_Jmn1iJWanoSFb1QZn3mbTD_JEoMsWcWj5QPeyHZHA@mail.gmail.com>
 <20190506130643.62c35eeb@gandalf.local.home>
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On Mon, May 6, 2019@10:06 AM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> Can you try booting with:
> [ snip snip ]
>
> And see if it boots?

No it doesn't.

Dang, I tried to figure out what's up, but now I really have to start
handling all the puill requests..

I thought it might be an int3 that happens on the entry stack, but I
don't think that should ever happen. Either it's a user-mode int3, or
we're in the kernel and have switched stacks. So I still don't see why
my patch doesn't work, but now I have no time to debug it.

                   Linus