[Bug 273929] AArch64 machine-dependent code clobbers X0 in SIGTRAP from capsicum violations

In reply to: bugzilla-noreply_a_freebsd.org: "[Bug 273929] AArch64 machine-dependent code clobbers X0 in SIGTRAP from capsicum violations"
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From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 19 Sep 2023 08:55:29 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273929

--- Comment #5 from David Chisnall <theraven@FreeBSD.org> ---
I'm not sure what the `mc->mc_gpregs.gp_elr` modification is for in the link
register.  The PC is set to the instruction after the syscall return in the
signal handler and so you shouldn't need to skip any instructions.

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