From: Heiko Carstens <hca@linux.ibm.com>
To: Nathan Chancellor <nathan@kernel.org>
Cc: Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] s390/decompresser: fix misaligned symbol build error
Date: Thu, 22 Jun 2023 14:55:08 +0200 [thread overview]
Message-ID: <20230622125508.1068457-1-hca@linux.ibm.com> (raw)
Nathan Chancellor reported a kernel build error on Fedora 39:
$ clang --version | head -1
clang version 16.0.5 (Fedora 16.0.5-1.fc39)
$ s390x-linux-gnu-ld --version | head -1
GNU ld version 2.40-1.fc39
$ make -skj"$(nproc)" ARCH=s390 CC=clang CROSS_COMPILE=s390x-linux-gnu- olddefconfig all
s390x-linux-gnu-ld: arch/s390/boot/startup.o(.text+0x5b4): misaligned symbol `_decompressor_end' (0x35b0f) for relocation R_390_PC32DBL
make[3]: *** [.../arch/s390/boot/Makefile:78: arch/s390/boot/vmlinux] Error 1
It turned out that the problem with misaligned symbols on s390 was fixed
with commit 80ddf5ce1c92 ("s390: always build relocatable kernel") for the
kernel image, but did not take into account that the decompressor uses its
own set of CFLAGS, which come without -fPIE.
Add the -fPIE flag also to the decompresser CFLAGS to fix this.
Reported-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1747
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
arch/s390/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index ed646c583e4f..5ed242897b0d 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -27,6 +27,7 @@ KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float -mbac
KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS_DECOMPRESSOR += -ffreestanding
KBUILD_CFLAGS_DECOMPRESSOR += -fno-stack-protector
+KBUILD_CFLAGS_DECOMPRESSOR += -fPIE
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-disable-warning, address-of-packed-member)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
--
2.39.2
next reply other threads:[~2023-06-22 12:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-22 12:55 Heiko Carstens [this message]
2023-06-22 14:35 ` [PATCH] s390/decompresser: fix misaligned symbol build error Nathan Chancellor
2023-06-22 16:56 ` Heiko Carstens
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