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 | ||
| c25e1c55 | 12 | # for c_flags |
| 9b9a3f20 MY |
13 | include $(srctree)/scripts/Makefile.lib |
| 14 | ||
| 15 | # find all modules listed in modules.order | |
| 6768fa4b | 16 | modules := $(call read-file, $(MODORDER)) |
| 9b9a3f20 | 17 | |
| f65a4868 | 18 | __modfinal: $(modules:%.o=%.ko) |
| 9b9a3f20 MY |
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] $@ | |
| 25a21fbb | 26 | cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI) $(CFLAGS_GCOV), $(c_flags)) -c -o $@ $< |
| 9b9a3f20 MY |
27 | |
| 28 | %.mod.o: %.mod.c FORCE | |
| 29 | $(call if_changed_dep,cc_o_c) | |
| 30 | ||
| 9b9a3f20 | 31 | quiet_cmd_ld_ko_o = LD [M] $@ |
| b1a1a1a0 | 32 | cmd_ld_ko_o += \ |
| 9b9a3f20 MY |
33 | $(LD) -r $(KBUILD_LDFLAGS) \ |
| 34 | $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ | |
| 7f6d8f7e | 35 | -T scripts/module.lds -o $@ $(filter %.o, $^) |
| 9b9a3f20 | 36 | |
| 5f9ae91f | 37 | quiet_cmd_btf_ko = BTF [M] $@ |
| e732b538 | 38 | cmd_btf_ko = \ |
| 2f7ab126 MO |
39 | if [ ! -f vmlinux ]; then \ |
| 40 | printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ | |
| 2f7ab126 | 41 | else \ |
| 9741e07e | 42 | LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J $(PAHOLE_FLAGS) --btf_base vmlinux $@; \ |
| 0e32dfc8 | 43 | $(RESOLVE_BTFIDS) -b vmlinux $@; \ |
| e732b538 | 44 | fi; |
| 5f9ae91f AN |
45 | |
| 46 | # Same as newer-prereqs, but allows to exclude specified extra dependencies | |
| 47 | newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) | |
| 48 | ||
| 49 | # Same as if_changed, but allows to exclude specified extra dependencies | |
| 50 | if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ | |
| 51 | $(cmd); \ | |
| 92215e7a | 52 | printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) |
| 5f9ae91f AN |
53 | |
| 54 | # Re-generate module BTFs if either module's .ko or vmlinux changed | |
| f65a4868 | 55 | %.ko: %.o %.mod.o scripts/module.lds $(and $(CONFIG_DEBUG_INFO_BTF_MODULES),$(KBUILD_BUILTIN),vmlinux) FORCE |
| 5f9ae91f AN |
56 | +$(call if_changed_except,ld_ko_o,vmlinux) |
| 57 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
| 58 | +$(if $(newer-prereqs),$(call cmd,btf_ko)) | |
| 59 | endif | |
| 9b9a3f20 | 60 | |
| f65a4868 | 61 | targets += $(modules:%.o=%.ko) $(modules:%.o=%.mod.o) |
| 9b9a3f20 MY |
62 | |
| 63 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
| 64 | # --------------------------------------------------------------------------- | |
| 65 | ||
| 66 | PHONY += FORCE | |
| 67 | FORCE: | |
| 68 | ||
| 69 | # Read all saved command lines and dependencies for the $(targets) we | |
| 70 | # may be building above, using $(if_changed{,_dep}). As an | |
| 71 | # optimization, we don't need to read them if the target does not | |
| 72 | # exist, we will rebuild anyway in that case. | |
| 73 | ||
| 74 | existing-targets := $(wildcard $(sort $(targets))) | |
| 75 | ||
| 76 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
| 77 | ||
| 78 | .PHONY: $(PHONY) |