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LoongArch: Disable module from accessing external data directly

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The distance between vmlinux and the module is too far so that PC-REL
cannot be accessed directly, only GOT.

When compiling module with GCC, the option `-mdirect-extern-access` is
disabled by default. The Clang option `-fdirect-access-external-data` is
enabled by default, so it needs to be explicitly disabled.

Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
WANG Rui 2023-11-08 14:12:07 +08:00 committed by Huacai Chen
parent 80c7889de7
commit 21eb2bfe27
1 changed files with 2 additions and 0 deletions
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2
arch/loongarch/Makefile
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@ -68,6 +68,8 @@ LDFLAGS_vmlinux += -static -n -nostdlib
ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS
cflags-y += $(call cc-option,-mexplicit-relocs)
KBUILD_CFLAGS_KERNEL += $(call cc-option,-mdirect-extern-access)
KBUILD_AFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data)
KBUILD_CFLAGS_MODULE += $(call cc-option,-fno-direct-access-external-data)
KBUILD_AFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
else