[Just correcting the -r's to be -r321706.]

On 2017-Jul-30, at 1:34 PM, Mark Millard <mar...@dsl-only.net> wrote:

I experiment with system clang targeting powerpc
(and powerpc64). Until recently I could buildkernel
via system clang 4 (but it had problems if tried to
boot such a kernel). After clang 5 it no longer
completes the buildkernel. I'm submitting based on
a -r321706 build attempt. The system binutils are
in use.

The technical material from the submittal is. . .

First I list what the R_PPC_PLTREL24 is tied to
then the error text then the build context.

objdump reports that the .text+0x2b94 involved
is in aha_isa_probe and is a reference to aha_alloc:

(sorted objdump -x output:)
00002b78 R_PPC_PLTREL24    bus_alloc_resource
00002b88 R_PPC_PLTREL24    rman_get_start
00002b94 R_PPC_PLTREL24    aha_alloc
00002b96 R_PPC_ADDR32      .debug_str+0x0000266c
00002b9c R_PPC_PLTREL24    aha_probe
00002b9f R_PPC_ADDR32      .debug_str+0x00001904

(objdump -d --prefix-addresses output:)
00002aa4 <aha_isa_probe> mflr    r0
. . .
00002b7c <aha_isa_probe+0xd8> cmplwi  r3,0
00002b80 <aha_isa_probe+0xdc> stw     r3,188(r28)
00002b84 <aha_isa_probe+0xe0> beq     00002c1c <aha_isa_probe+0x178>
00002b88 <aha_isa_probe+0xe4> bl      00002b88 <aha_isa_probe+0xe4>
00002b8c <aha_isa_probe+0xe8> mr      r3,r28
00002b90 <aha_isa_probe+0xec> mr      r27,r4
00002b94 <aha_isa_probe+0xf0> bl      00002b94 <aha_isa_probe+0xf0>
00002b98 <aha_isa_probe+0xf4> mr      r3,r28
00002b9c <aha_isa_probe+0xf8> bl      00002b9c <aha_isa_probe+0xf8>
00002ba0 <aha_isa_probe+0xfc> cmplwi  r3,0


--- all_subdir_aha ---
Building 
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha.kld
. . .
--- all_subdir_aha ---
Building 
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha.ko.full
. . .
--- aha.ko.full ---
ld: aha.kld(.text+0x2b94): R_PPC_PLTREL24 reloc against local symbol
aha.kld: could not read symbols: Bad value
. . .
--- all_subdir_aha ---
*** [aha.ko.full] Error code 1

make[4]: stopped in /usr/src/sys/modules/aha
.ERROR_TARGET='aha.ko.full'
.ERROR_META_FILE='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha.ko.full.meta'
.MAKE.LEVEL='4'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
_ERROR_CMD='ld -m elf32ppc_fbsd -Bshareable -znotext -d -warn-common  -o 
aha.ko.full aha.kld;'
.CURDIR='/usr/src/sys/modules/aha'
.MAKE='make'
.OBJDIR='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha'
.TARGETS='all'
DESTDIR=''
LD_LIBRARY_PATH=''
MACHINE='powerpc'
MACHINE_ARCH='powerpc'
MAKEOBJDIRPREFIX='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules'
MAKESYSPATH='/usr/src/share/mk'
MAKE_VERSION='20170720'
--- all_subdir_agp ---
Building 
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/agp/agp.ko.full
--- all_subdir_aha ---
PATH='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/usr/sbin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/usr/bin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/bin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/usr/sbin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/usr/bin:/sbin:/bin:/usr/sbin:/usr/bin'
SRCTOP='/usr/src'
OBJTOP='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src'
.MAKE.MAKEFILES='/usr/src/share/mk/sys.mk /usr/src/share/mk/local.sys.env.mk 
/usr/src/share/mk/src.sys.env.mk 
/root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-host 
/usr/src/share/mk/bsd.mkopt.mk /usr/src/share/mk/bsd.suffixes.mk 
/root/src.configs/make.conf /usr/src/share/mk/local.sys.mk 
/usr/src/share/mk/src.sys.mk /dev/null /usr/src/sys/modules/aha/Makefile 
/usr/src/share/mk/bsd.kmod.mk /usr/src/sys/conf/kmod.mk 
/usr/src/share/mk/bsd.init.mk /usr/src/share/mk/bsd.opts.mk 
/usr/src/share/mk/bsd.cpu.mk /usr/src/share/mk/local.init.mk 
/usr/src/share/mk/src.init.mk /usr/src/sys/modules/aha/../Makefile.inc 
/usr/src/share/mk/bsd.own.mk /usr/src/share/mk/bsd.compiler.mk 
/usr/src/share/mk/bsd.linker.mk /usr/src/sys/conf/kern.opts.mk 
/usr/src/sys/conf/config.mk /usr/src/share/mk/bsd.links.mk 
/usr/src/share/mk/bsd.dep.mk /usr/src/share/mk/bsd.clang-analyze.mk 
/usr/src/share/mk/bsd.obj.mk /usr/src/share/mk/bsd.subdir.mk 
/usr/src/sys/conf/kern.mk'
.PATH='. /usr/src/sys/modules/aha /usr/src/sys/dev/aha 
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG'
1 error

make[4]: stopped in /usr/src/sys/modules/aha
.ERROR_TARGET='aha.ko.full'
.ERROR_META_FILE='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha/aha.ko.full.meta'
.MAKE.LEVEL='4'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose'
_ERROR_CMD='ld -m elf32ppc_fbsd -Bshareable -znotext -d -warn-common  -o 
aha.ko.full aha.kld;'
.CURDIR='/usr/src/sys/modules/aha'
.MAKE='make'
.OBJDIR='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src/sys/modules/aha'
.TARGETS='all'
DESTDIR=''
LD_LIBRARY_PATH=''
MACHINE='powerpc'
MACHINE_ARCH='powerpc'
MAKEOBJDIRPREFIX='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules'
MAKESYSPATH='/usr/src/share/mk'
MAKE_VERSION='20170720'
PATH='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/usr/sbin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/usr/bin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/legacy/bin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/usr/sbin:/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/tmp/usr/bin:/sbin:/bin:/usr/sbin:/usr/bin'
SRCTOP='/usr/src'
OBJTOP='/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG/modules/usr/src'
.MAKE.MAKEFILES='/usr/src/share/mk/sys.mk /usr/src/share/mk/local.sys.env.mk 
/usr/src/share/mk/src.sys.env.mk 
/root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-host 
/usr/src/share/mk/bsd.mkopt.mk /usr/src/share/mk/bsd.suffixes.mk 
/root/src.configs/make.conf /usr/src/share/mk/local.sys.mk 
/usr/src/share/mk/src.sys.mk /dev/null /usr/src/sys/modules/aha/Makefile 
/usr/src/share/mk/bsd.kmod.mk /usr/src/sys/conf/kmod.mk 
/usr/src/share/mk/bsd.init.mk /usr/src/share/mk/bsd.opts.mk 
/usr/src/share/mk/bsd.cpu.mk /usr/src/share/mk/local.init.mk 
/usr/src/share/mk/src.init.mk /usr/src/sys/modules/aha/../Makefile.inc 
/usr/src/share/mk/bsd.own.mk /usr/src/share/mk/bsd.compiler.mk 
/usr/src/share/mk/bsd.linker.mk /usr/src/sys/conf/kern.opts.mk 
/usr/src/sys/conf/config.mk /usr/src/share/mk/bsd.links.mk 
/usr/src/share/mk/bsd.dep.mk /usr/src/share/mk/bsd.clang-analyze.mk 
/usr/src/share/mk/bsd.obj.mk /usr/src/share/mk/bsd.subdir.mk 
/usr/src/sys/conf/kern.mk'
.PATH='. /usr/src/sys/modules/aha /usr/src/sys/dev/aha 
/usr/obj/powerpcvtsc_clang/powerpc.powerpc/usr/src/sys/GENERICvtsc-NODBG'
*** [all_subdir_aha] Error code 2


Build context:

~/sys_build_scripts.amd64-host/make_powerpcvtsc_nodebug_clang_bootstrap-amd64-host.sh
 -j8 buildworld buildkernel

# more 
~/sys_build_scripts.amd64-host/make_powerpcvtsc_nodebug_clang_bootstrap-amd64-host.sh
 
kldload -n filemon && \
script 
~/sys_typescripts/typescript_make_powerpcvtsc_nodebug_clang_bootstrap-amd64-host-$(date
 +%Y-%m-%d:%H:%M:%S) \
env __MAKE_CONF="/root/src.configs/make.conf" SRCCONF="/dev/null" 
SRC_ENV_CONF="/root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-host" \
WITH_META_MODE=yes \
MAKEOBJDIRPREFIX="/usr/obj/powerpcvtsc_clang" \
make $*

C# more /root/src.configs/make.conf
CFLAGS.gcc+= -v

# more /root/src.configs/src.conf.powerpc-clang-bootstrap.amd64-host
TO_TYPE=powerpc
#
KERNCONF=GENERICvtsc-NODBG
TARGET=${TO_TYPE}
.if ${.MAKE.LEVEL} == 0
TARGET_ARCH=${TO_TYPE}
.export TARGET_ARCH
.endif
#
WITH_CROSS_COMPILER=
WITHOUT_SYSTEM_COMPILER=
#
WITH_LIBCPLUSPLUS=
WITH_BINUTILS_BOOTSTRAP=
WITH_ELFTOOLCHAIN_BOOTSTRAP=
WITH_CLANG_BOOTSTRAP=
WITH_CLANG=
WITH_CLANG_IS_CC=
WITH_CLANG_FULL=
WITH_CLANG_EXTRAS=
WITHOUT_LLD=
# lldb requires missing atomic 8-byte operations for powerpc (non-64)
WITHOUT_LLDB=
#
WITH_BOOT=
WITHOUT_LIB32=
#
WITHOUT_GCC_BOOTSTRAP=
WITHOUT_GCC=
WITHOUT_GCC_IS_CC=
WITHOUT_GNUCXX=
#
NO_WERROR=
#
# Use WERROR to avoid stopping at the likes of:
# error: implicit conversion from 'int' to 'int8_t' (aka 'signed char') changes 
value from 128 to -128 [-Werror,-Wconstant-conversion]
WERROR=
MALLOC_PRODUCTION=
#
WITH_REPRODUCIBLE_BUILD=
WITH_DEBUG_FILES=

===
Mark Millard
markmi at dsl-only.net

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