Jan-Benedict reported issue with building ppc64e_defconfig
with mainline GCC work:
powerpc64-linux-gcc -Wp,-MMD,arch/powerpc/kernel/vdso/.gettimeofday-64.o.d
-nostdinc -I./arch/powerpc/include -I./arch/powerpc/include/generated
-I./include -I./arch/powerpc/include/uapi
-I./arch/powerpc/include/generated/uapi -I./include/uapi
-I./include/generated/uapi -include ./include/linux/compiler-version.h -include
./include/linux/kconfig.h -D__KERNEL__ -I ./arch/powerpc -DHAVE_AS_ATHIGH=1
-fmacro-prefix-map=./= -D__ASSEMBLY__ -fno-PIE -m64 -Wl,-a64 -mabi=elfv1
-Wa,-me500 -Wa,-me500mc -mabi=elfv1 -mbig-endian
-Wl,-soname=linux-vdso64.so.1 -D__VDSO64__ -s -c -o
arch/powerpc/kernel/vdso/gettimeofday-64.o
arch/powerpc/kernel/vdso/gettimeofday.S
arch/powerpc/kernel/vdso/gettimeofday.S: Assembler messages:
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`stdu'
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`stdu'
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`std'
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`std'
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`ld'
arch/powerpc/kernel/vdso/gettimeofday.S:72: Error: unrecognized opcode:
`ld'
...
make[1]: *** [arch/powerpc/kernel/vdso/Makefile:76:
arch/powerpc/kernel/vdso/gettimeofday-64.o] Error 1
make: *** [arch/powerpc/Makefile:387: vdso_prepare] Error 2
This is due to assembler being called with -me500mc which is
a 32 bits target.
The problem comes from the fact that CONFIG_PPC_E500MC is selected for
both the e500mc (32 bits) and the e5500 (64 bits), and therefore the
following makefile rule is wrong:
cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
Today we have CONFIG_TARGET_CPU which provides the identification of the
expected CPU, it is used for GCC. Use it as well for the assembler.
With that change (And also commit 825eada7717c ("powerpc/64: Set
default CPU in Kconfig")), it now is:
powerpc64-linux-gcc -Wp,-MMD,arch/powerpc/kernel/vdso/.gettimeofday-64.o.d
-nostdinc -I./arch/powerpc/include -I./arch/powerpc/include/generated
-I./include -I./arch/powerpc/include/uapi
-I./arch/powerpc/include/generated/uapi -I./include/uapi
-I./include/generated/uapi -include ./include/linux/compiler-version.h -include
./include/linux/kconfig.h -D__KERNEL__ -I ./arch/powerpc -DHAVE_AS_ATHIGH=1
-fmacro-prefix-map=./= -D__ASSEMBLY__ -fno-PIE -m64 -Wl,-a64 -mabi=elfv1
-mcpu=e500mc64 -Wa,-me500mc64 -mabi=elfv1 -mbig-endian
-Wl,-soname=linux-vdso64.so.1 -D__VDSO64__ -s -c -o
arch/powerpc/kernel/vdso/gettimeofday-64.o
arch/powerpc/kernel/vdso/gettimeofday.S
Reported-by: Jan-Benedict Glaw <jbg...@lug-owl.de>
Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
v2: When target cpu is powerpc, the option to be used is -mppc
Commit 825eada7717c is in powerpc/next-test branch. Make sure the SHA doesn't
change when it goes into powerpc/next
---
arch/powerpc/Makefile | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index bf5f0a998273..528452ce80b4 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -201,18 +201,20 @@ KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
# often slow when they are implemented at all
KBUILD_CFLAGS += $(call cc-option,-mno-string)
-cpu-as-$(CONFIG_40x) += -Wa,-m405
-cpu-as-$(CONFIG_44x) += -Wa,-m440
cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
-cpu-as-$(CONFIG_PPC_E500) += -Wa,-me500
+
+ifeq ($(CONFIG_TARGET_CPU),powerpc)
+cpu-as-$(CONFIG_TARGET_CPU_BOOL) += -Wa,-mppc
+else
+cpu-as-$(CONFIG_TARGET_CPU_BOOL) += -Wa,-m$(CONFIG_TARGET_CPU)
+endif
# When using '-many -mpower4' gas will first try and find a matching power4
# mnemonic and failing that it will allow any valid mnemonic that GAS knows
# about. GCC will pass -many to GAS when assembling, clang does not.
# LLVM IAS doesn't understand either flag:
https://github.com/ClangBuiltLinux/linux/issues/675
# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway...
-cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call
as-option,-Wa$(comma)-many)
-cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
+cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-many)
KBUILD_AFLAGS += $(cpu-as-y)
KBUILD_CFLAGS += $(cpu-as-y)
--
2.38.1
