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authorIlie Halip <ilie.halip@gmail.com>2019-11-12 15:45:20 +0200
committerWill Deacon <will@kernel.org>2019-11-13 10:52:05 +0000
commit65e1f38d9a2f07d4b81f369864c105880e47bd5a (patch)
tree1d0d86b499b14b1049e7bbd39f7165fadaba8e6b
parentarm64: Do not mask out PTE_RDONLY in pte_same() (diff)
downloadlinux-dev-65e1f38d9a2f07d4b81f369864c105880e47bd5a.tar.xz
linux-dev-65e1f38d9a2f07d4b81f369864c105880e47bd5a.zip
scripts/tools-support-relr.sh: un-quote variables
When the CC variable contains quotes, e.g. when using ccache (make CC="ccache <compiler>"), this script always fails, so CONFIG_RELR is never enabled, even when the toolchain supports this feature. Removing the /dev/null redirect and invoking the script manually shows the issue: $ CC='/usr/bin/ccache clang' ./scripts/tools-support-relr.sh ./scripts/tools-support-relr.sh: 7: ./scripts/tools-support-relr.sh: /usr/bin/ccache clang: not found Fix this by un-quoting the variables. Before: $ make ARCH=arm64 CC='/usr/bin/ccache clang' LD=ld.lld \ NM=llvm-nm OBJCOPY=llvm-objcopy defconfig $ grep RELR .config CONFIG_ARCH_HAS_RELR=y With this change: $ make ARCH=arm64 CC='/usr/bin/ccache clang' LD=ld.lld \ NM=llvm-nm OBJCOPY=llvm-objcopy defconfig $ grep RELR .config CONFIG_TOOLS_SUPPORT_RELR=y CONFIG_ARCH_HAS_RELR=y CONFIG_RELR=y Fixes: 5cf896fb6be3 ("arm64: Add support for relocating the kernel with RELR relocations") Reported-by: Dmitry Golovin <dima@golovin.in> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com> Link: https://github.com/ClangBuiltLinux/linux/issues/769 Cc: Peter Collingbourne <pcc@google.com> Signed-off-by: Ilie Halip <ilie.halip@gmail.com> Signed-off-by: Will Deacon <will@kernel.org>
-rwxr-xr-xscripts/tools-support-relr.sh8
1 files changed, 4 insertions, 4 deletions
diff --git a/scripts/tools-support-relr.sh b/scripts/tools-support-relr.sh
index 97a2c844a95e..45e8aa360b45 100755
--- a/scripts/tools-support-relr.sh
+++ b/scripts/tools-support-relr.sh
@@ -4,13 +4,13 @@
tmp_file=$(mktemp)
trap "rm -f $tmp_file.o $tmp_file $tmp_file.bin" EXIT
-cat << "END" | "$CC" -c -x c - -o $tmp_file.o >/dev/null 2>&1
+cat << "END" | $CC -c -x c - -o $tmp_file.o >/dev/null 2>&1
void *p = &p;
END
-"$LD" $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr -o $tmp_file
+$LD $tmp_file.o -shared -Bsymbolic --pack-dyn-relocs=relr -o $tmp_file
# Despite printing an error message, GNU nm still exits with exit code 0 if it
# sees a relr section. So we need to check that nothing is printed to stderr.
-test -z "$("$NM" $tmp_file 2>&1 >/dev/null)"
+test -z "$($NM $tmp_file 2>&1 >/dev/null)"
-"$OBJCOPY" -O binary $tmp_file $tmp_file.bin
+$OBJCOPY -O binary $tmp_file $tmp_file.bin