Date: Fri, 29 Dec 2023 18:00:48 +0100 From: Dimitry Andric <dim@FreeBSD.org> To: Harry Schmalzbauer <freebsd@omnilan.de> Cc: FreeBSD-STABLE <freebsd-stable@freebsd.org> Subject: Re: SIGILL when CPUTYPE set to anyting witjh avx and CFLAGS -O2 Message-ID: <72107B4B-F279-471B-8A8F-5B94C5EEDA47@FreeBSD.org> In-Reply-To: <accdf012-1b04-4227-9b0c-a78e94133fc2@omnilan.de> References: <accdf012-1b04-4227-9b0c-a78e94133fc2@omnilan.de>
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On 29 Dec 2023, at 11:14, Harry Schmalzbauer <freebsd@omnilan.de> wrote: >=20 > at least since 14-release, I can't compile base/ports with CPUTYPE = post nehalem. Any '-march' declaring AVX(*) capability leads to = SIGILLing binaries with default -O2 CFLAGS. > Not much of a help, but here's a ports example, but same result with = base outcome too: >=20 > zsh: illegal hardware instruction (core dumped) = /var/ports-wrktree/editors/vim/work-console/vim-9.0.2143/src/vim > kernel: pid 56502 (vim), jid 0, uid 0: exited on signal 4 (core = dumped) >=20 > gdb /var/ports-wrktree/editors/vim/work-console/vim-9.0.2143/src/vim = /var/ports-wrktree/editors/vim/work-console/vim-9.0.2143/runtime/doc/vim.c= ore >=20 > GNU gdb (GDB) 13.2 [GDB v13.2 for FreeBSD] > Copyright (C) 2023 Free Software Foundation, Inc. > License GPLv3+: GNU GPL version 3 or later = <http://gnu.org/licenses/gpl.html>; > This is free software: you are free to change and redistribute it. > There is NO WARRANTY, to the extent permitted by law. > Type "show copying" and "show warranty" for details. > This GDB was configured as "x86_64-portbld-freebsd14.0". > Type "show configuration" for configuration details. > For bug reporting instructions, please see: > <https://www.gnu.org/software/gdb/bugs/>. > Find the GDB manual and other documentation resources online at: > <http://www.gnu.org/software/gdb/documentation/>. >=20 > For help, type "help". > Type "apropos word" to search for commands related to "word"... > Reading symbols from = /var/ports-wrktree/editors/vim/work-console/vim-9.0.2143/src/vim... > [New LWP 154051] > Core was generated by = `/var/ports-wrktree/editors/vim/work-console/vim-9.0.2143/src/vim = --clean -esX -V'. > Program terminated with signal SIGILL, Illegal instruction. > Privileged opcode. > #0 0x000000000041e040 in init_yank () >=20 >=20 > If I compile without CFLAGS -O2 ("CFLAGS=3D -pipe"), = -march=3Dskylake-avx512 the binary doens't crash with SIGILL. >=20 > Is CPUTYPE supposed to stay untouched these days? Obviously not, but are you sure your target CPU is correct? If it is = not, the compiler may insert unsupported instructions. In any case, for the above gdb session, try the command "disassemble" to = see which particular instruction it crashed on. That may give more = information. -Dimitry
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