From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:34421) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goXbT-0001ip-TB for qemu-devel@nongnu.org; Tue, 29 Jan 2019 12:55:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1goXbQ-0000Tf-9n for qemu-devel@nongnu.org; Tue, 29 Jan 2019 12:55:18 -0500 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Tue, 29 Jan 2019 18:53:47 +0100 Message-Id: <20190129175403.18017-3-philmd@redhat.com> In-Reply-To: <20190129175403.18017-1-philmd@redhat.com> References: <20190129175403.18017-1-philmd@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v2 02/18] configure: Disable W^X on OpenBSD List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Brad Smith , qemu-devel@nongnu.org Cc: Stefan Hajnoczi , qemu-block@nongnu.org, Igor Mammedov , Paolo Bonzini , Eric Blake , Peter Maydell , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Kevin Wolf , Max Reitz , Markus Armbruster , Fam Zheng , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , "Michael S. Tsirkin" , Kamil Rytarowski Since OpenBSD 6.0 [1], W^X is enforced by default [2]. TCG requires WX access. Disable W^X if it is available. This fixes: # lm32-softmmu/qemu-system-lm32 Could not allocate dynamic translator buffer # sysctl kern.wxabort=3D1 kern.wxabort: 0 -> 1 # lm32-softmmu/qemu-system-lm32 mmap: Not supported Abort trap (core dumped) # gdb -q lm32-softmmu/qemu-system-lm32 qemu-system-lm32.core (gdb) bt #0 0x000017e3c156c50a in _thread_sys___syscall () at {standard input}:= 5 #1 0x000017e3c15e5d7a in *_libc_mmap (addr=3DVariable "addr" is not av= ailable.) at /usr/src/lib/libc/sys/mmap.c:47 #2 0x000017e17d9abc8b in alloc_code_gen_buffer () at /usr/src/qemu/acc= el/tcg/translate-all.c:1064 #3 0x000017e17d9abd04 in code_gen_alloc (tb_size=3D0) at /usr/src/qemu= /accel/tcg/translate-all.c:1112 #4 0x000017e17d9abe81 in tcg_exec_init (tb_size=3D0) at /usr/src/qemu/= accel/tcg/translate-all.c:1149 #5 0x000017e17d9897e9 in tcg_init (ms=3D0x17e45e456800) at /usr/src/qe= mu/accel/tcg/tcg-all.c:66 #6 0x000017e17d9891b8 in accel_init_machine (acc=3D0x17e3c3f50800, ms=3D= 0x17e45e456800) at /usr/src/qemu/accel/accel.c:63 #7 0x000017e17d989312 in configure_accelerator (ms=3D0x17e45e456800, p= rogname=3D0x7f7fffff07b0 "lm32-softmmu/qemu-system-lm32") at /usr/src/qem= u/accel/accel.c:111 #8 0x000017e17d9d8616 in main (argc=3D1, argv=3D0x7f7fffff06b8, envp=3D= 0x7f7fffff06c8) at vl.c:4325 [1] https://www.openbsd.org/faq/upgrade60.html [2] https://undeadly.org/cgi?action=3Darticle&sid=3D20160527203200 Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- configure | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/configure b/configure index b18281c61f..799ec2013b 100755 --- a/configure +++ b/configure @@ -5795,6 +5795,17 @@ if test "$mingw32" =3D "yes" ; then done fi =20 +# Disable OpenBSD W^X if available +if test "$tcg" =3D "yes" -a "$targetos" =3D "OpenBSD"; then + cat > $TMPC <