Date: Sat, 13 Sep 2014 18:02:38 +0200 From: =?UTF-8?B?SmVhbi1Tw6liYXN0aWVuIFDDqWRyb24=?= <dumbbell@FreeBSD.org> To: freebsd-sparc64@FreeBSD.org Subject: Playing with HEAD/sparc64 and clang Message-ID: <54146A9E.4070800@FreeBSD.org>
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Hi!
With the help of Roman Divacky, I started to play with clang on sparc64.
The build of the kernel and world completes (though, I use a patch to
pcpu.h provided by Roman). However, the loader fail to load the kernel,
and I'm not sure the world binaries are correct.
=3D=3D Compilation =3D=3D
First, I cross-build kernel and world on an amd64 computer. The source
tree is at r271475. Here are the variables I set in the environment:
export MAKEOBJDIRPREFIX=3D$(pwd)
export TARGET=3Dsparc64
export TARGET_ARCH=3Dsparc64
export WITH_CLANG_BOOTSTRAP=3Dy
export WITH_CLANG=3Dy
export WITH_CLANG_IS_CC=3Dy
export WITH_LIBCPLUSPLUS=3Dy
Compared to mail sent by Dimitry Andric in last February [1], I added
WITH_CLANG_BOOTSTRAP. Otherwise, clang isn't build early enough and the
host compiler is used (producing amd64 binaries).
=3D=3D Kernel =3D=3D
When I boot the kernel built with clang, I get:
jumping to kernel entry at 0xc00a8000
Data Access Exception
Then, I'm left at the OpenBoot prompt.
=3D=3D World =3D=3D
I install world in an alternate directory.
When I run bin/sh from that directory, it works.
When I set LD_LIBRARY_PATH to point to $directory/lib and run bin/sh, it
works.
When I run "chroot $directory /bin/sh", I get:
Illegal instruction
The computer is a Sun Ultra60 with dual UltraSPARC II 450 MHz. Its dmesg
is here:
https://people.freebsd.org/~dumbbell/sparc64/freebsd-ultra60-dmesg.txt
I'm ready to provide any information required and test patches :)
[1]
https://lists.freebsd.org/pipermail/freebsd-sparc64/2014-February/009233.=
html
--=20
Jean-S=C3=A9bastien P=C3=A9dron
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