From: Andreas Schwab <schwab@linux-m68k.org>
To: Marco Elver <elver@google.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>,
linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org,
kasan-dev@googlegroups.com
Subject: Re: [PATCH] m68k: Implement _THIS_IP_ using inline asm
Date: Thu, 21 May 2026 17:14:33 +0200 [thread overview]
Message-ID: <87h5o0zteu.fsf@igel.home> (raw)
In-Reply-To: <20260521123438.147789-1-elver@google.com> (Marco Elver's message of "Thu, 21 May 2026 14:34:30 +0200")
On Mai 21 2026, Marco Elver wrote:
> version. Additionally, avoiding taking the address of a label prevents
> compilers from emitting spurious indirect branch targets (e.g. ENDBR or
> BTI) under control-flow integrity schemes.
Ignoring the fact that m68k will never gain such a feature, dot is still
a label. If you want to avoid a label, you need to use %pc(0) (or
%pc(-2) for an address at insn boundary).
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2026-05-21 15:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-21 12:34 [PATCH] m68k: Implement _THIS_IP_ using inline asm Marco Elver
2026-05-21 15:14 ` Andreas Schwab [this message]
2026-05-21 15:26 ` Marco Elver
2026-05-21 18:03 ` David Laight
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