diff options
| author | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 17:47:45 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 17:47:45 +0300 |
| commit | 310c33dc7a1278d80ba717b9964bd478d52681e0 (patch) | |
| tree | 0480d0a0aa1b9c1efa31f498d6227ed2b931aad1 /arch/riscv/Makefile | |
| parent | 2667e3673f7079cf95d58cf84d7c0b5a455ac68b (diff) | |
| parent | 559d1e45a16dcf1542e430ea3dce9ab625be98d0 (diff) | |
| download | linux-310c33dc7a1278d80ba717b9964bd478d52681e0.tar.xz | |
Merge patch series "Introduce 64b relocatable kernel"
Alexandre Ghiti <alexghiti@rivosinc.com> says:
After multiple attempts, this patchset is now based on the fact that the
64b kernel mapping was moved outside the linear mapping.
The first patch allows to build relocatable kernels but is not selected
by default. That patch is a requirement for KASLR.
The second and third patches take advantage of an already existing powerpc
script that checks relocations at compile-time, and uses it for riscv.
* b4-shazam-merge:
riscv: Use --emit-relocs in order to move .rela.dyn in init
riscv: Check relocations at compile time
powerpc: Move script to check relocations at compile time in scripts/
riscv: Introduce CONFIG_RELOCATABLE
riscv: Move .rela.dyn outside of init to avoid empty relocations
riscv: Prepare EFI header for relocatable kernels
Link: https://lore.kernel.org/r/20230329045329.64565-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/Makefile')
| -rw-r--r-- | arch/riscv/Makefile | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile index 1b276f62f22b..e859e1721a8f 100644 --- a/arch/riscv/Makefile +++ b/arch/riscv/Makefile @@ -7,9 +7,12 @@ # OBJCOPYFLAGS := -O binary -LDFLAGS_vmlinux := +ifeq ($(CONFIG_RELOCATABLE),y) + LDFLAGS_vmlinux += -shared -Bsymbolic -z notext -z norelro --emit-relocs + KBUILD_CFLAGS += -fPIE +endif ifeq ($(CONFIG_DYNAMIC_FTRACE),y) - LDFLAGS_vmlinux := --no-relax + LDFLAGS_vmlinux += --no-relax KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY ifeq ($(CONFIG_RISCV_ISA_C),y) CC_FLAGS_FTRACE := -fpatchable-function-entry=4 |