From: Stuart Henderson <stu@spacehopper.org>
Subject: Re: devel/ruby-ffi failure on arm64 BTI
To: Klemens Nanni <kn@openbsd.org>
Cc: ports <ports@openbsd.org>, Jeremy Evans <jeremy@openbsd.org>
Date: Sun, 22 Mar 2026 19:23:04 +0000

On 2026/03/22 15:51, Klemens Nanni wrote:
> 	# pkg_add ruby34-ffi
> 	$ ktrace -di ruby34 /usr/local/lib/ruby/gems/3.4/gems/ffi-1.17.2/samples/getpid.rb
> 	[ big dump of loaded files ]
> 	Illegal instruction (core dumped)
> 
> 	$ kdump | grep BTCFI
> 	 88448 ruby34   PSIG  SIGILL caught handler=0x221c893fcc mask=0<> code=ILL_BTCFI addr=0x22b6114000 trapno=905969665
...
> Even with USE_NOBTCFI-aarch64=Yes in lang/ruby/3.4 (as well as devel/ruby-ffi
> and devel/libffi for good measure) it still fails.

does it make it into the binary? objdump -p | grep OPENBSD
(compare with e.g. python3).

setting it on the libraries won't help.