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| author | Alexandre Ghiti <alex@ghiti.fr> | 2023-03-29 07:53:28 +0300 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-19 17:46:32 +0300 |
| commit | c2dea0bc53397166a77811d9b66928643a83d6f3 (patch) | |
| tree | 778bb8026b57daf5e8e4f92e2ba661b25eebb474 /arch/riscv/Makefile.postlink | |
| parent | 47981b5cc6871d78aee67b6c9ae70aff90ddb97d (diff) | |
| download | linux-c2dea0bc53397166a77811d9b66928643a83d6f3.tar.xz | |
riscv: Check relocations at compile time
Relocating kernel at runtime is done very early in the boot process, so
it is not convenient to check for relocations there and react in case a
relocation was not expected.
There exists a script in scripts/ that extracts the relocations from
vmlinux that is then used at postlink to check the relocations.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20230329045329.64565-6-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/Makefile.postlink')
| -rw-r--r-- | arch/riscv/Makefile.postlink | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv/Makefile.postlink b/arch/riscv/Makefile.postlink new file mode 100644 index 000000000000..d5de8d520d3e --- /dev/null +++ b/arch/riscv/Makefile.postlink @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: GPL-2.0 +# =========================================================================== +# Post-link riscv pass +# =========================================================================== +# +# Check that vmlinux relocations look sane + +PHONY := __archpost +__archpost: + +-include include/config/auto.conf +include $(srctree)/scripts/Kbuild.include + +quiet_cmd_relocs_check = CHKREL $@ +cmd_relocs_check = \ + $(CONFIG_SHELL) $(srctree)/arch/riscv/tools/relocs_check.sh "$(OBJDUMP)" "$(NM)" "$@" + +# `@true` prevents complaint when there is nothing to be done + +vmlinux: FORCE + @true +ifdef CONFIG_RELOCATABLE + $(call if_changed,relocs_check) +endif + +%.ko: FORCE + @true + +clean: + @true + +PHONY += FORCE clean + +FORCE: + +.PHONY: $(PHONY) |