Date: Sat, 23 Jun 2012 08:35:18 -0600 From: Warner Losh <wlosh@bsdimp.com> To: Tim Kientzle <kientzle@freebsd.org> Cc: arm@freebsd.org Subject: Re: armv6 tree vs. buildkernel Message-ID: <31C8D224-72D4-4BE8-8EC3-29B078C7DAC3@bsdimp.com> In-Reply-To: <3F1A5B5F-0787-41CE-8C77-8B1F9A601172@freebsd.org> References: <3F1A5B5F-0787-41CE-8C77-8B1F9A601172@freebsd.org>
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On Jun 22, 2012, at 10:11 PM, Tim Kientzle wrote:
> On the BeagleBone, running a very recent armv6 tree:
>=20
> # make TARGET_CPUTYPE=3Darmv6 buildworld
> # make TARGET_CPUTYPE=3Darmv6 KERNCONF=3DBEAGLEBONE buildkernel
> =85.
> --------------------------------------------------------------
>>>> stage 3.2: building everything
> --------------------------------------------------------------
> cd /usr/obj/usr/src/sys/BEAGLEBONE; MAKEOBJDIRPREFIX=3D/usr/obj =
MACHINE_ARCH=3Darm MACHINE=3Darm CPUTYPE=3Darmv6 =
GROFF_BIN_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/bin =
GROFF_FONT_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/share/groff_font =
GROFF_TMAC_PATH=3D/usr/obj/usr/src/tmp/legacy/usr/share/tmac =
_SHLIBDIRPREFIX=3D/usr/obj/usr/src/tmp VERSION=3D"FreeBSD 10.0-CURRENT =
arm 1000011" INSTALL=3D"sh /usr/src/tools/install.sh" =
PATH=3D/usr/obj/usr/src/tmp/legacy/usr/sbin:/usr/obj/usr/src/tmp/legacy/us=
r/bin:/usr/obj/usr/src/tmp/legacy/usr/games:/usr/obj/usr/src/tmp/usr/sbin:=
/usr/obj/usr/src/tmp/usr/bin:/usr/obj/usr/src/tmp/usr/games:/sbin:/bin:/us=
r/sbin:/usr/bin make KERNEL=3Dkernel all -DNO_MODULES_OBJ
> cc -mlittle-endian -c -x assembler-with-cpp -DLOCORE -O -pipe =
-march=3Darmv6 -DARM_ARCH_6=3D1 -std=3Dc99 -g -Wall -Wredundant-decls =
-Wnested-externs -Wstrict-prototypes -Wmissing-prototypes =
-Wpointer-arith -Winline -Wcast-qual -Wundef -Wno-pointer-sign =
-fformat-extensions -Wmissing-include-dirs -fdiagnostics-show-option =
-nostdinc -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq =
-I/usr/src/sys/contrib/libfdt -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS =
-include opt_global.h -fno-common -finline-limit=3D8000 --param =
inline-unit-growth=3D100 --param large-function-growth=3D1000 =
-D_ARM_ARCH_6 -ffreestanding -Werror /usr/src/sys/arm/arm/locore.S
> In file included from /usr/src/sys/arm/arm/locore.S:38:
> ./machine/asm.h:139:1: error: "_ARM_ARCH_6" redefined
> <command-line>: error: this is the location of the previous definition
>=20
>=20
> One solution to this seems to be to edit sys/arm/include/asm.h to =
properly redefine these symbols, e.g.,
>=20
> #if defined(_ARM_ARCH_7) || defined (__ARM_ARCH_6__) || \
> defined (__ARM_ARCH_6J__)
> + #undef _ARM_ARCH_6
> #define _ARM_ARCH_6
> #endif
>=20
>=20
> After this change, it gets as far as:
>=20
> cc -mlittle-endian -c -O -pipe -march=3Darmv6 -DARM_ARCH_6=3D1 =
-std=3Dc99 -g -Wall -Wredundant-decls -Wnested-externs =
-Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline =
-Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions =
-Wmissing-include-dirs -fdiagnostics-show-option -nostdinc -I. =
-I/usr/src/sys -I/usr/src/sys/contrib/altq -I/usr/src/sys/contrib/libfdt =
-D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common =
-finline-limit=3D8000 --param inline-unit-growth=3D100 --param =
large-function-growth=3D1000 -D_ARM_ARCH_6 -ffreestanding -Werror =
/usr/src/sys/kern/kern_clock.c
> {standard input}: Assembler messages:
> {standard input}:1363: Error: selected processor does not support =
`dmb'
> {standard input}:1382: Error: selected processor does not support =
`dmb'
> *** [kern_clock.o] Error code 1
>=20
> This seems to be due to some mismatch between sys/arm/include/atomic.h =
(which is getting ARM_ARCH_7A from somewhere?) and the -march setting. =
I hope to track down the details this weekend.
>=20
> Tim
>=20
> P.S. How is CPUTYPE/TARGET_CPUTYPE supposed to be inferred for =
regular "buildworld"?
> The only option I can find is to set it explicitly in /etc/src.conf
It can't possibly work very well. We need to get TARGET_ARCH=3Darmv6 =
working instead of continuing these kludges.
Warner=
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