diff options
Diffstat (limited to '')
-rw-r--r-- | scripts/Makefile.vmlinux | 51 | ||||
-rw-r--r-- | scripts/Makefile.vmlinux_o | 104 |
2 files changed, 155 insertions, 0 deletions
diff --git a/scripts/Makefile.vmlinux b/scripts/Makefile.vmlinux new file mode 100644 index 000000000..49946cb96 --- /dev/null +++ b/scripts/Makefile.vmlinux @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0-only + +PHONY := __default +__default: vmlinux + +include include/config/auto.conf +include $(srctree)/scripts/Kbuild.include + +# for c_flags +include $(srctree)/scripts/Makefile.lib + +targets := + +quiet_cmd_cc_o_c = CC $@ + cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< + +%.o: %.c FORCE + $(call if_changed_dep,cc_o_c) + +ifdef CONFIG_MODULES +targets += .vmlinux.export.o +vmlinux: .vmlinux.export.o +endif + +ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) + +# Final link of vmlinux with optional arch pass after final link +cmd_link_vmlinux = \ + $< "$(LD)" "$(KBUILD_LDFLAGS)" "$(LDFLAGS_vmlinux)"; \ + $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) + +targets += vmlinux +vmlinux: scripts/link-vmlinux.sh vmlinux.o $(KBUILD_LDS) FORCE + +$(call if_changed_dep,link_vmlinux) + +# Add FORCE to the prequisites of a target to force it to be always rebuilt. +# --------------------------------------------------------------------------- + +PHONY += FORCE +FORCE: + +# Read all saved command lines and dependencies for the $(targets) we +# may be building above, using $(if_changed{,_dep}). As an +# optimization, we don't need to read them if the target does not +# exist, we will rebuild anyway in that case. + +existing-targets := $(wildcard $(sort $(targets))) + +-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) + +.PHONY: $(PHONY) diff --git a/scripts/Makefile.vmlinux_o b/scripts/Makefile.vmlinux_o new file mode 100644 index 000000000..0edfdb403 --- /dev/null +++ b/scripts/Makefile.vmlinux_o @@ -0,0 +1,104 @@ +# SPDX-License-Identifier: GPL-2.0-only + +PHONY := __default +__default: vmlinux.o modules.builtin.modinfo modules.builtin + +include include/config/auto.conf +include $(srctree)/scripts/Kbuild.include + +# for objtool +include $(srctree)/scripts/Makefile.lib + +# Generate a linker script to ensure correct ordering of initcalls for Clang LTO +# --------------------------------------------------------------------------- + +quiet_cmd_gen_initcalls_lds = GEN $@ + cmd_gen_initcalls_lds = \ + $(PYTHON3) $(srctree)/scripts/jobserver-exec \ + $(PERL) $(real-prereqs) > $@ + +.tmp_initcalls.lds: $(srctree)/scripts/generate_initcall_order.pl \ + vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE + $(call if_changed,gen_initcalls_lds) + +targets := .tmp_initcalls.lds + +ifdef CONFIG_LTO_CLANG +initcalls-lds := .tmp_initcalls.lds +endif + +# objtool for vmlinux.o +# --------------------------------------------------------------------------- +# +# For LTO and IBT, objtool doesn't run on individual translation units. +# Run everything on vmlinux instead. + +objtool-enabled := $(or $(delay-objtool),$(CONFIG_NOINSTR_VALIDATION)) + +vmlinux-objtool-args-$(delay-objtool) += $(objtool-args-y) +vmlinux-objtool-args-$(CONFIG_GCOV_KERNEL) += --no-unreachable +vmlinux-objtool-args-$(CONFIG_NOINSTR_VALIDATION) += --noinstr $(if $(CONFIG_CPU_UNRET_ENTRY), --unret) + +objtool-args = $(vmlinux-objtool-args-y) --link + +# Link of vmlinux.o used for section mismatch analysis +# --------------------------------------------------------------------------- + +quiet_cmd_ld_vmlinux.o = LD $@ + cmd_ld_vmlinux.o = \ + $(LD) ${KBUILD_LDFLAGS} -r -o $@ \ + $(addprefix -T , $(initcalls-lds)) \ + --whole-archive vmlinux.a --no-whole-archive \ + --start-group $(KBUILD_VMLINUX_LIBS) --end-group \ + $(cmd_objtool) + +define rule_ld_vmlinux.o + $(call cmd_and_savecmd,ld_vmlinux.o) + $(call cmd,gen_objtooldep) +endef + +vmlinux.o: $(initcalls-lds) vmlinux.a $(KBUILD_VMLINUX_LIBS) FORCE + $(call if_changed_rule,ld_vmlinux.o) + +targets += vmlinux.o + +# module.builtin.modinfo +# --------------------------------------------------------------------------- + +OBJCOPYFLAGS_modules.builtin.modinfo := -j .modinfo -O binary + +targets += modules.builtin.modinfo +modules.builtin.modinfo: vmlinux.o FORCE + $(call if_changed,objcopy) + +# module.builtin +# --------------------------------------------------------------------------- + +# The second line aids cases where multiple modules share the same object. + +quiet_cmd_modules_builtin = GEN $@ + cmd_modules_builtin = \ + tr '\0' '\n' < $< | \ + sed -n 's/^[[:alnum:]:_]*\.file=//p' | \ + tr ' ' '\n' | uniq | sed -e 's:^:kernel/:' -e 's/$$/.ko/' > $@ + +targets += modules.builtin +modules.builtin: modules.builtin.modinfo FORCE + $(call if_changed,modules_builtin) + +# Add FORCE to the prequisites of a target to force it to be always rebuilt. +# --------------------------------------------------------------------------- + +PHONY += FORCE +FORCE: + +# Read all saved command lines and dependencies for the $(targets) we +# may be building above, using $(if_changed{,_dep}). As an +# optimization, we don't need to read them if the target does not +# exist, we will rebuild anyway in that case. + +existing-targets := $(wildcard $(sort $(targets))) + +-include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) + +.PHONY: $(PHONY) |