1link-out-dir = $(out-dir)/core 2 3link-script-dummy = $(arch-dir)/kernel/link_dummy.ld 4link-script = $(if $(wildcard $(platform-dir)/kern.ld.S), \ 5 $(platform-dir)/kern.ld.S, \ 6 $(arch-dir)/kernel/kern.ld.S) 7link-script-pp = $(link-out-dir)/kern.ld 8link-script-dep = $(link-out-dir)/.kern.ld.d 9 10AWK = awk 11 12link-ldflags-common += $(call ld-option,--no-warn-rwx-segments) 13ifeq ($(CFG_ARM32_core),y) 14link-ldflags-common += $(call ld-option,--no-warn-execstack) 15endif 16 17link-ldflags = $(LDFLAGS) 18ifeq ($(call cfg-one-enabled, CFG_CORE_ASLR CFG_CORE_PHYS_RELOCATABLE),y) 19link-ldflags += -pie -Bsymbolic -z norelro $(ldflag-apply-dynamic-relocs) 20ifeq ($(CFG_ARM64_core),y) 21link-ldflags += -z text 22else 23# Suppression of relocations in read-only segments has not been done yet 24link-ldflags += -z notext 25endif 26endif 27ifeq ($(CFG_CORE_BTI),y) 28# force-bti tells the linker to warn if some object files lack the .note.gnu.property 29# section with the BTI flag, and to turn on the BTI flag in the output anyway. The 30# resulting executable would likely fail at runtime so we use this flag along 31# with the --fatal-warnings below to check and prevent this situation (with useful 32# diagnostics). 33link-ldflags += $(call ld-option,-z force-bti) --fatal-warnings 34endif 35link-ldflags += -T $(link-script-pp) -Map=$(link-out-dir)/tee.map 36link-ldflags += --sort-section=alignment 37link-ldflags += --fatal-warnings 38link-ldflags += --gc-sections 39link-ldflags += $(link-ldflags-common) 40 41link-ldadd = $(LDADD) 42link-ldadd += $(ldflags-external) 43link-ldadd += $(libdeps) 44link-objs := $(filter-out \ 45 $(out-dir)/$(platform-dir)/link_dummies_paged.o \ 46 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 47 $(out-dir)/$(arch-dir)/kernel/link_dummies_paged.o \ 48 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 49 $(objs)) 50link-objs-init := $(filter-out \ 51 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 52 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 53 $(objs)) 54ldargs-tee.elf := $(link-ldflags) $(link-objs) $(link-out-dir)/version.o \ 55 $(link-ldadd) 56 57link-script-cppflags := \ 58 $(filter-out $(CPPFLAGS_REMOVE) $(cppflags-remove), \ 59 $(nostdinccore) $(CPPFLAGS) \ 60 $(addprefix -I,$(incdirscore) $(link-out-dir)) \ 61 $(cppflagscore)) 62 63ldargs-all_objs := -T $(link-script-dummy) --no-check-sections \ 64 $(link-ldflags-common) \ 65 $(link-objs) $(link-ldadd) 66cleanfiles += $(link-out-dir)/all_objs.o 67$(link-out-dir)/all_objs.o: $(objs) $(libdeps) $(MAKEFILE_LIST) 68 @$(cmd-echo-silent) ' LD $@' 69 $(q)$(LDcore) $(ldargs-all_objs) -o $@ 70 71cleanfiles += $(link-out-dir)/unpaged_entries.txt 72$(link-out-dir)/unpaged_entries.txt: $(link-out-dir)/all_objs.o 73 @$(cmd-echo-silent) ' GEN $@' 74 $(q)$(NMcore) $< | \ 75 $(AWK) '/ ____keep_pager/ { printf "-u%s ", $$3 }' > $@ 76 77unpaged-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \ 78 $(link-ldflags-common) 79unpaged-ldadd := $(objs) $(link-ldadd) 80cleanfiles += $(link-out-dir)/unpaged.o 81$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt 82 @$(cmd-echo-silent) ' LD $@' 83 $(q)$(LDcore) $(unpaged-ldargs) \ 84 `cat $(link-out-dir)/unpaged_entries.txt` \ 85 $(unpaged-ldadd) -o $@ 86 87cleanfiles += $(link-out-dir)/text_unpaged.ld.S 88$(link-out-dir)/text_unpaged.ld.S: $(link-out-dir)/unpaged.o 89 @$(cmd-echo-silent) ' GEN $@' 90 $(q)$(READELFcore) -S -W $< | \ 91 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 92 93cleanfiles += $(link-out-dir)/rodata_unpaged.ld.S 94$(link-out-dir)/rodata_unpaged.ld.S: $(link-out-dir)/unpaged.o 95 @$(cmd-echo-silent) ' GEN $@' 96 $(q)$(READELFcore) -S -W $< | \ 97 $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 98 99 100cleanfiles += $(link-out-dir)/init_entries.txt 101$(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o 102 @$(cmd-echo-silent) ' GEN $@' 103 $(q)$(NMcore) $< | \ 104 $(AWK) '/ ____keep_init/ { printf "-u%s ", $$3 }' > $@ 105 106init-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \ 107 $(link-ldflags-common) 108init-ldadd := $(link-objs-init) $(link-out-dir)/version.o $(link-ldadd) 109cleanfiles += $(link-out-dir)/init.o 110$(link-out-dir)/init.o: $(link-out-dir)/init_entries.txt 111 $(call gen-version-o) 112 @$(cmd-echo-silent) ' LD $@' 113 $(q)$(LDcore) $(init-ldargs) \ 114 `cat $(link-out-dir)/init_entries.txt` \ 115 $(init-ldadd) -o $@ 116 117cleanfiles += $(link-out-dir)/text_init.ld.S 118$(link-out-dir)/text_init.ld.S: $(link-out-dir)/init.o 119 @$(cmd-echo-silent) ' GEN $@' 120 $(q)$(READELFcore) -S -W $< | \ 121 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 122 123cleanfiles += $(link-out-dir)/rodata_init.ld.S 124$(link-out-dir)/rodata_init.ld.S: $(link-out-dir)/init.o 125 @$(cmd-echo-silent) ' GEN $@' 126 $(q)$(READELFcore) -S -W $< | $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 127 128-include $(link-script-dep) 129 130link-script-extra-deps += $(link-out-dir)/text_unpaged.ld.S 131link-script-extra-deps += $(link-out-dir)/rodata_unpaged.ld.S 132link-script-extra-deps += $(link-out-dir)/text_init.ld.S 133link-script-extra-deps += $(link-out-dir)/rodata_init.ld.S 134link-script-extra-deps += $(conf-file) 135cleanfiles += $(link-script-pp) $(link-script-dep) 136$(link-script-pp): $(link-script) $(link-script-extra-deps) 137 @$(cmd-echo-silent) ' CPP $@' 138 @mkdir -p $(dir $@) 139 $(q)$(CPPcore) -P -MT $@ -MD -MP -MF $(link-script-dep) \ 140 $(link-script-cppflags) $< -o $@ 141 142$(link-out-dir)/version.o: 143 $(call gen-version-o) 144 145-include $(link-out-dir)/.tee.elf.cmd 146define check-link-objs 147$(if $(strip $(filter-out $(link-objs), $(old-link-objs)) 148 $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE) 149endef 150$(eval $(call check-link-objs)) 151 152all: $(link-out-dir)/tee.elf 153cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map 154cleanfiles += $(link-out-dir)/version.o 155cleanfiles += $(link-out-dir)/.buildcount 156cleanfiles += $(link-out-dir)/.tee.elf.cmd 157$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK) 158 @echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd 159 @$(cmd-echo-silent) ' LD $@' 160 $(q)$(LDcore) $(ldargs-tee.elf) -o $@ 161 162all: $(link-out-dir)/tee.dmp 163cleanfiles += $(link-out-dir)/tee.dmp 164$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf 165 @$(cmd-echo-silent) ' OBJDUMP $@' 166 $(q)$(OBJDUMPcore) -l -x -d $< > $@ 167 168cleanfiles += $(link-out-dir)/tee-pager.bin 169$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 170 @echo Warning: $@ is deprecated 171 @$(cmd-echo-silent) ' GEN $@' 172 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@ 173 174cleanfiles += $(link-out-dir)/tee-pageable.bin 175$(link-out-dir)/tee-pageable.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 176 @echo Warning: $@ is deprecated 177 @$(cmd-echo-silent) ' GEN $@' 178 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pageable_bin $@ 179 180all: $(link-out-dir)/tee.bin 181cleanfiles += $(link-out-dir)/tee.bin 182$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 183 @$(cmd-echo-silent) ' GEN $@' 184 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@ 185 186all: $(link-out-dir)/tee-header_v2.bin 187cleanfiles += $(link-out-dir)/tee-header_v2.bin 188$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \ 189 scripts/gen_tee_bin.py 190 @$(cmd-echo-silent) ' GEN $@' 191 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@ 192 193all: $(link-out-dir)/tee-pager_v2.bin 194cleanfiles += $(link-out-dir)/tee-pager_v2.bin 195$(link-out-dir)/tee-pager_v2.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 196 @$(cmd-echo-silent) ' GEN $@' 197 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pager_v2 $@ 198 199all: $(link-out-dir)/tee-pageable_v2.bin 200cleanfiles += $(link-out-dir)/tee-pageable_v2.bin 201$(link-out-dir)/tee-pageable_v2.bin: $(link-out-dir)/tee.elf \ 202 scripts/gen_tee_bin.py 203 @$(cmd-echo-silent) ' GEN $@' 204 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pageable_v2 $@ 205 206all: $(link-out-dir)/tee.symb_sizes 207cleanfiles += $(link-out-dir)/tee.symb_sizes 208$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf 209 @$(cmd-echo-silent) ' GEN $@' 210 $(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@ 211 212cleanfiles += $(link-out-dir)/tee.mem_usage 213ifneq ($(filter mem_usage,$(MAKECMDGOALS)),) 214mem_usage: $(link-out-dir)/tee.mem_usage 215 216$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf 217 @$(cmd-echo-silent) ' GEN $@' 218 $(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@ 219endif 220 221all: $(link-out-dir)/tee-raw.bin 222cleanfiles += $(link-out-dir)/tee-raw.bin 223$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 224 @$(cmd-echo-silent) ' GEN $@' 225 $(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@ 226 227cleanfiles += $(link-out-dir)/tee.srec 228$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin 229 @$(cmd-echo-silent) ' SREC $@' 230 $(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@ 231