projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 9b9a3f20 MY |
1 | # SPDX-License-Identifier: GPL-2.0-only |
| 2 | # =========================================================================== | |
| 3 | # Module final link | |
| 4 | # =========================================================================== | |
| 5 | ||
| 6 | PHONY := __modfinal | |
| 7 | __modfinal: | |
| 8 | ||
| 5f9ae91f | 9 | include include/config/auto.conf |
| 9b9a3f20 MY |
10 | include $(srctree)/scripts/Kbuild.include |
| 11 | ||
| 850ded46 | 12 | # for c_flags and mod-prelink-ext |
| 9b9a3f20 MY |
13 | include $(srctree)/scripts/Makefile.lib |
| 14 | ||
| 15 | # find all modules listed in modules.order | |
| 16 | modules := $(sort $(shell cat $(MODORDER))) | |
| 17 | ||
| 18 | __modfinal: $(modules) | |
| 19 | @: | |
| 20 | ||
| eb27ea5c | 21 | # modname and part-of-module are set to make c_flags define proper module flags |
| 9b9a3f20 | 22 | modname = $(notdir $(@:.mod.o=)) |
| eb27ea5c | 23 | part-of-module = y |
| 9b9a3f20 MY |
24 | |
| 25 | quiet_cmd_cc_o_c = CC [M] $@ | |
| cf68fffb | 26 | cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI), $(c_flags)) -c -o $@ $< |
| 9b9a3f20 MY |
27 | |
| 28 | %.mod.o: %.mod.c FORCE | |
| 29 | $(call if_changed_dep,cc_o_c) | |
| 30 | ||
| 31 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
| 32 | ||
| 33 | quiet_cmd_ld_ko_o = LD [M] $@ | |
| b1a1a1a0 | 34 | cmd_ld_ko_o += \ |
| 9b9a3f20 MY |
35 | $(LD) -r $(KBUILD_LDFLAGS) \ |
| 36 | $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ | |
| 596b0474 | 37 | -T scripts/module.lds -o $@ $(filter %.o, $^); \ |
| 9b9a3f20 MY |
38 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
| 39 | ||
| 5f9ae91f | 40 | quiet_cmd_btf_ko = BTF [M] $@ |
| e732b538 AN |
41 | cmd_btf_ko = \ |
| 42 | if [ -f vmlinux ]; then \ | |
| ff2e6efd | 43 | LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J --btf_base vmlinux $@; \ |
| e732b538 AN |
44 | else \ |
| 45 | printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ | |
| 46 | fi; | |
| 5f9ae91f AN |
47 | |
| 48 | # Same as newer-prereqs, but allows to exclude specified extra dependencies | |
| 49 | newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) | |
| 50 | ||
| 51 | # Same as if_changed, but allows to exclude specified extra dependencies | |
| 52 | if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ | |
| 53 | $(cmd); \ | |
| 54 | printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) | |
| 55 | ||
| dc5723b0 | 56 | |
| 5f9ae91f | 57 | # Re-generate module BTFs if either module's .ko or vmlinux changed |
| 850ded46 | 58 | $(modules): %.ko: %$(mod-prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE |
| 5f9ae91f AN |
59 | +$(call if_changed_except,ld_ko_o,vmlinux) |
| 60 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
| 61 | +$(if $(newer-prereqs),$(call cmd,btf_ko)) | |
| 62 | endif | |
| 9b9a3f20 MY |
63 | |
| 64 | targets += $(modules) $(modules:.ko=.mod.o) | |
| 65 | ||
| 66 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
| 67 | # --------------------------------------------------------------------------- | |
| 68 | ||
| 69 | PHONY += FORCE | |
| 70 | FORCE: | |
| 71 | ||
| 72 | # Read all saved command lines and dependencies for the $(targets) we | |
| 73 | # may be building above, using $(if_changed{,_dep}). As an | |
| 74 | # optimization, we don't need to read them if the target does not | |
| 75 | # exist, we will rebuild anyway in that case. | |
| 76 | ||
| 77 | existing-targets := $(wildcard $(sort $(targets))) | |
| 78 | ||
| 79 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
| 80 | ||
| 81 | .PHONY: $(PHONY) |