Date: Wed, 25 Apr 2018 18:58:40 +0200 From: Andre Albsmeier <Andre.Albsmeier@siemens.com> To: freebsd-stable@freebsd.org Cc: Andre.Albsmeier@siemens.com Subject: gptboot broken when compiled with clang 6 and WITHOUT_LOADER_GELI -- clang 5 is OK Message-ID: <20180425165840.GA1330@bali>
next in thread | raw e-mail | index | archive | help
I have set up a new system disk for an i386 11.2-PRERELEASE box. I did the usual gpart create -s gpt $disk gpart add -t freebsd-boot -s 984 $disk gpart bootcode -b /boot/pmbr -p /boot/gptboot -i 1 $disk ... thing, just to notice that the box wouldn't boot. It seems to hang where stage 2 should be run -- when the '\' should start spinning the screen turns white and the box hangs (tested on two machines, an Asus P5W and a Supermicro A2SAV). So I replaced gptboot on the new disk by the one from an older machine and everything was fine. I wanted to find out what is actually causing the issue and recompiled /usr/src/stand after updating the old sources in several steps. Eventually it turned out that it depends on the compiler. When compiling the latest /usr/src/stand with clang 5.0.1 the resulting gptboot works. When using 6.0.0 it doesn't. To be exact, it's gptboot.o which is causing the problems. When using a gptboot.o from a clang 5 system it is OK, when using a gptboot.o from a clang 6 system it fails. To add more confusion: I usually have WITHOUT_LOADER_GELI in my make.conf. When removing this, the resulting gptboot works even when compiled with clang 6... I can reproduce this in case s.o. wants me to do some tests...
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20180425165840.GA1330>