linux/arch/riscv/Makefile.postlink
Alexandre Ghiti 559d1e45a1
riscv: Use --emit-relocs in order to move .rela.dyn in init
To circumvent an issue where placing the relocations inside the init
sections produces empty relocations, use --emit-relocs. But to avoid
carrying those relocations in vmlinux, use an intermediate
vmlinux.relocs file which is a copy of vmlinux *before* stripping its
relocations.

Suggested-by: Björn Töpel <bjorn@kernel.org>
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230329045329.64565-7-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-04-19 07:46:33 -07:00

50 lines
1.2 KiB
Makefile

# 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)" "$(NM)" "$@"
ifdef CONFIG_RELOCATABLE
quiet_cmd_cp_vmlinux_relocs = CPREL vmlinux.relocs
cmd_cp_vmlinux_relocs = cp vmlinux vmlinux.relocs
quiet_cmd_relocs_strip = STRIPREL $@
cmd_relocs_strip = $(OBJCOPY) --remove-section='.rel.*' \
--remove-section='.rel__*' \
--remove-section='.rela.*' \
--remove-section='.rela__*' $@
endif
# `@true` prevents complaint when there is nothing to be done
vmlinux: FORCE
@true
ifdef CONFIG_RELOCATABLE
$(call if_changed,relocs_check)
$(call if_changed,cp_vmlinux_relocs)
$(call if_changed,relocs_strip)
endif
%.ko: FORCE
@true
clean:
@true
PHONY += FORCE clean
FORCE:
.PHONY: $(PHONY)