From: David Laight <David.Laight@ACULAB.COM>
To: 'Mathieu Desnoyers' <mathieu.desnoyers@efficios.com>,
Florian Weimer <fw@deneb.enyo.de>
Cc: Peter Zijlstra <peterz@infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
paulmck <paulmck@kernel.org>, Boqun Feng <boqun.feng@gmail.com>,
"H. Peter Anvin" <hpa@zytor.com>, Paul Turner <pjt@google.com>,
linux-api <linux-api@vger.kernel.org>,
Christian Brauner <christian.brauner@ubuntu.com>,
carlos <carlos@redhat.com>
Subject: RE: [RFC PATCH] rseq: x86: implement abort-at-ip extension
Date: Fri, 7 Jan 2022 22:27:17 +0000 [thread overview]
Message-ID: <701ff3888b3f42f4a6a1dded84b79078@AcuMS.aculab.com> (raw)
In-Reply-To: <1300078200.13848.1641590867024.JavaMail.zimbra@efficios.com>
> That being said, there might be an architecture agnostic alternative available.
> On abort of a RSEQ_CS_FLAG_ABORT_AT_IP critical section, we could let the kernel
> decrement/increment the stack pointer to make room for a pointer (depending if the
> stack grows down or up). It would then store the abort-at-ip value at the top of
> stack.
Stack redzone in a leaf function?
-
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next prev parent reply other threads:[~2022-01-07 22:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-07 17:03 [RFC PATCH] rseq: x86: implement abort-at-ip extension Mathieu Desnoyers
2022-01-07 19:31 ` Florian Weimer
2022-01-07 19:48 ` Mathieu Desnoyers
2022-01-07 21:27 ` Mathieu Desnoyers
2022-01-07 22:27 ` David Laight [this message]
2022-01-08 1:08 ` Mathieu Desnoyers
2022-01-08 1:33 ` Mathieu Desnoyers
2022-01-08 1:33 ` Mathieu Desnoyers
2022-01-12 15:16 ` Florian Weimer
2022-01-12 15:26 ` Mathieu Desnoyers
2022-01-12 15:38 ` Peter Zijlstra
2022-01-12 16:00 ` Florian Weimer
2022-01-12 16:38 ` Mathieu Desnoyers
2022-01-12 21:00 ` Florian Weimer
2022-01-12 21:24 ` Mathieu Desnoyers
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