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| author | Youling Tang <tangyouling@loongson.cn> | 2023-02-25 15:52:56 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-02-25 22:12:16 +0800 |
| commit | d8da19fbdedd5852592fbba18a7348e3f09500e6 (patch) | |
| tree | a6a4a921da97d0b7379e9034532c8267a14b631e /arch/loongarch/Makefile | |
| parent | 396233c650084cb957eb6d87dd4abd3e56a7d499 (diff) | |
| download | linux-stable-d8da19fbdedd5852592fbba18a7348e3f09500e6.tar.gz linux-stable-d8da19fbdedd5852592fbba18a7348e3f09500e6.tar.bz2 linux-stable-d8da19fbdedd5852592fbba18a7348e3f09500e6.zip | |
LoongArch: Add support for kernel relocation
This config allows to compile kernel as PIE and to relocate it at any
virtual address at runtime: this paves the way to KASLR.
Runtime relocation is possible since relocation metadata are embedded
into the kernel.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Xi Ruoyao <xry111@xry111.site> # Use arch_initcall
Signed-off-by: Jinyang He <hejinyang@loongson.cn> # Provide la_abs relocation code
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/Makefile')
| -rw-r--r-- | arch/loongarch/Makefile | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile index 6e1c931a8507..768592998b39 100644 --- a/arch/loongarch/Makefile +++ b/arch/loongarch/Makefile @@ -71,6 +71,11 @@ KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs endif +ifeq ($(CONFIG_RELOCATABLE),y) +KBUILD_CFLAGS_KERNEL += -fPIE +LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext +endif + cflags-y += -ffreestanding cflags-y += $(call cc-option, -mno-check-zero-division) |