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authorWANG Rui <wangrui@loongson.cn>2023-12-09 08:49:15 +0100
committerHuacai Chen <chenhuacai@loongson.cn>2023-12-09 08:49:15 +0100
commiteea673e9d5ea994c60b550ffb684413d3759b3f4 (patch)
tree5357404180f646a323ef55c006b0fc3539aeeae3 /arch
parentLinux 6.7-rc4 (diff)
downloadlinux-eea673e9d5ea994c60b550ffb684413d3759b3f4.tar.xz
linux-eea673e9d5ea994c60b550ffb684413d3759b3f4.zip
LoongArch: Apply dynamic relocations for LLD
For the following assembly code: .text .global func func: nop .data var: .dword func When linked with `-pie`, GNU LD populates the `var` variable with the pre-relocated value of `func`. However, LLVM LLD does not exhibit the same behavior. This issue also arises with the `kernel_entry` in arch/ loongarch/kernel/head.S: _head: .word MZ_MAGIC /* "MZ", MS-DOS header */ .org 0x8 .dword kernel_entry /* Kernel entry point */ The correct kernel entry from the MS-DOS header is crucial for jumping to vmlinux from zboot. This necessity is why the compressed relocatable kernel compiled by Clang encounters difficulties in booting. To address this problem, it is proposed to apply dynamic relocations to place with `--apply-dynamic-relocs`. Link: https://github.com/ClangBuiltLinux/linux/issues/1962 Signed-off-by: WANG Rui <wangrui@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
-rw-r--r--arch/loongarch/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
index 204b94b2e6aa..4ba8d67ddb09 100644
--- a/arch/loongarch/Makefile
+++ b/arch/loongarch/Makefile
@@ -83,7 +83,7 @@ endif
ifeq ($(CONFIG_RELOCATABLE),y)
KBUILD_CFLAGS_KERNEL += -fPIE
-LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext
+LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext $(call ld-option, --apply-dynamic-relocs)
endif
cflags-y += $(call cc-option, -mno-check-zero-division)