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 = $(LDFLAGS) 13ifeq ($(CFG_CORE_ASLR),y) 14link-ldflags += -pie -Bsymbolic -z norelro $(ldflag-apply-dynamic-relocs) 15ifeq ($(CFG_ARM64_core),y) 16link-ldflags += -z text 17else 18# Suppression of relocations in read-only segments has not been done yet 19link-ldflags += -z notext 20endif 21endif 22ifeq ($(CFG_CORE_BTI),y) 23# force-bti tells the linker to warn if some object files lack the .note.gnu.property 24# section with the BTI flag, and to turn on the BTI flag in the output anyway. The 25# resulting executable would likely fail at runtime so we use this flag along 26# with the --fatal-warnings below to check and prevent this situation (with useful 27# diagnostics). 28link-ldflags += $(call ld-option,-z force-bti) --fatal-warnings 29endif 30link-ldflags += -T $(link-script-pp) -Map=$(link-out-dir)/tee.map 31link-ldflags += --sort-section=alignment 32link-ldflags += --fatal-warnings 33link-ldflags += --gc-sections 34 35link-ldadd = $(LDADD) 36link-ldadd += $(ldflags-external) 37link-ldadd += $(libdeps) 38link-objs := $(filter-out \ 39 $(out-dir)/$(platform-dir)/link_dummies_paged.o \ 40 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 41 $(out-dir)/$(arch-dir)/kernel/link_dummies_paged.o \ 42 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 43 $(objs)) 44link-objs-init := $(filter-out \ 45 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 46 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 47 $(objs)) 48ldargs-tee.elf := $(link-ldflags) $(link-objs) $(link-out-dir)/version.o \ 49 $(link-ldadd) $(libgcccore) 50 51link-script-cppflags := \ 52 $(filter-out $(CPPFLAGS_REMOVE) $(cppflags-remove), \ 53 $(nostdinccore) $(CPPFLAGS) \ 54 $(addprefix -I,$(incdirscore) $(link-out-dir)) \ 55 $(cppflagscore)) 56 57ldargs-all_objs := -T $(link-script-dummy) --no-check-sections \ 58 $(link-objs) $(link-ldadd) $(libgcccore) 59cleanfiles += $(link-out-dir)/all_objs.o 60$(link-out-dir)/all_objs.o: $(objs) $(libdeps) $(MAKEFILE_LIST) 61 @$(cmd-echo-silent) ' LD $@' 62 $(q)$(LDcore) $(ldargs-all_objs) -o $@ 63 64cleanfiles += $(link-out-dir)/unpaged_entries.txt 65$(link-out-dir)/unpaged_entries.txt: $(link-out-dir)/all_objs.o 66 @$(cmd-echo-silent) ' GEN $@' 67 $(q)$(NMcore) $< | \ 68 $(AWK) '/ ____keep_pager/ { printf "-u%s ", $$3 }' > $@ 69 70unpaged-ldargs = -T $(link-script-dummy) --no-check-sections --gc-sections 71unpaged-ldadd := $(objs) $(link-ldadd) $(libgcccore) 72cleanfiles += $(link-out-dir)/unpaged.o 73$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt 74 @$(cmd-echo-silent) ' LD $@' 75 $(q)$(LDcore) $(unpaged-ldargs) \ 76 `cat $(link-out-dir)/unpaged_entries.txt` \ 77 $(unpaged-ldadd) -o $@ 78 79cleanfiles += $(link-out-dir)/text_unpaged.ld.S 80$(link-out-dir)/text_unpaged.ld.S: $(link-out-dir)/unpaged.o 81 @$(cmd-echo-silent) ' GEN $@' 82 $(q)$(READELFcore) -S -W $< | \ 83 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 84 85cleanfiles += $(link-out-dir)/rodata_unpaged.ld.S 86$(link-out-dir)/rodata_unpaged.ld.S: $(link-out-dir)/unpaged.o 87 @$(cmd-echo-silent) ' GEN $@' 88 $(q)$(READELFcore) -S -W $< | \ 89 $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 90 91 92cleanfiles += $(link-out-dir)/init_entries.txt 93$(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o 94 @$(cmd-echo-silent) ' GEN $@' 95 $(q)$(NMcore) $< | \ 96 $(AWK) '/ ____keep_init/ { printf "-u%s ", $$3 }' > $@ 97 98init-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections 99init-ldadd := $(link-objs-init) $(link-out-dir)/version.o $(link-ldadd) \ 100 $(libgcccore) 101cleanfiles += $(link-out-dir)/init.o 102$(link-out-dir)/init.o: $(link-out-dir)/init_entries.txt 103 $(call gen-version-o) 104 @$(cmd-echo-silent) ' LD $@' 105 $(q)$(LDcore) $(init-ldargs) \ 106 `cat $(link-out-dir)/init_entries.txt` \ 107 $(init-ldadd) -o $@ 108 109cleanfiles += $(link-out-dir)/text_init.ld.S 110$(link-out-dir)/text_init.ld.S: $(link-out-dir)/init.o 111 @$(cmd-echo-silent) ' GEN $@' 112 $(q)$(READELFcore) -S -W $< | \ 113 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 114 115cleanfiles += $(link-out-dir)/rodata_init.ld.S 116$(link-out-dir)/rodata_init.ld.S: $(link-out-dir)/init.o 117 @$(cmd-echo-silent) ' GEN $@' 118 $(q)$(READELFcore) -S -W $< | $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 119 120-include $(link-script-dep) 121 122link-script-extra-deps += $(link-out-dir)/text_unpaged.ld.S 123link-script-extra-deps += $(link-out-dir)/rodata_unpaged.ld.S 124link-script-extra-deps += $(link-out-dir)/text_init.ld.S 125link-script-extra-deps += $(link-out-dir)/rodata_init.ld.S 126link-script-extra-deps += $(conf-file) 127cleanfiles += $(link-script-pp) $(link-script-dep) 128$(link-script-pp): $(link-script) $(link-script-extra-deps) 129 @$(cmd-echo-silent) ' CPP $@' 130 @mkdir -p $(dir $@) 131 $(q)$(CPPcore) -P -MT $@ -MD -MF $(link-script-dep) \ 132 $(link-script-cppflags) $< -o $@ 133 134define update-buildcount 135 @$(cmd-echo-silent) ' UPD $(1)' 136 $(q)if [ ! -f $(1) ]; then \ 137 mkdir -p $(dir $(1)); \ 138 echo 1 >$(1); \ 139 else \ 140 expr 0`cat $(1)` + 1 >$(1); \ 141 fi 142endef 143 144# filter-out to workaround objdump warning 145version-o-cflags = $(filter-out -g3,$(core-platform-cflags) \ 146 $(platform-cflags) $(cflagscore)) 147# SOURCE_DATE_EPOCH defined for reproducible builds 148ifneq ($(SOURCE_DATE_EPOCH),) 149date-opts = -d @$(SOURCE_DATE_EPOCH) 150endif 151DATE_STR = `LC_ALL=C date -u $(date-opts)` 152BUILD_COUNT_STR = `cat $(link-out-dir)/.buildcount` 153CORE_CC_VERSION = `$(CCcore) -v 2>&1 | grep "version " | sed 's/ *$$//'` 154define gen-version-o 155 $(call update-buildcount,$(link-out-dir)/.buildcount) 156 @$(cmd-echo-silent) ' GEN $(link-out-dir)/version.o' 157 $(q)echo -e "const char core_v_str[] =" \ 158 "\"$(TEE_IMPL_VERSION) \"" \ 159 "\"($(CORE_CC_VERSION)) \"" \ 160 "\"#$(BUILD_COUNT_STR) \"" \ 161 "\"$(DATE_STR) \"" \ 162 "\"$(CFG_KERN_LINKER_ARCH)\";\n" \ 163 | $(CCcore) $(version-o-cflags) \ 164 -xc - -c -o $(link-out-dir)/version.o 165endef 166$(link-out-dir)/version.o: 167 $(call gen-version-o) 168 169-include $(link-out-dir)/.tee.elf.cmd 170define check-link-objs 171$(if $(strip $(filter-out $(link-objs), $(old-link-objs)) 172 $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE) 173endef 174$(eval $(call check-link-objs)) 175 176all: $(link-out-dir)/tee.elf 177cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map 178cleanfiles += $(link-out-dir)/version.o 179cleanfiles += $(link-out-dir)/.buildcount 180cleanfiles += $(link-out-dir)/.tee.elf.cmd 181$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK) 182 @echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd 183 @$(cmd-echo-silent) ' LD $@' 184 $(q)$(LDcore) $(ldargs-tee.elf) -o $@ 185 186all: $(link-out-dir)/tee.dmp 187cleanfiles += $(link-out-dir)/tee.dmp 188$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf 189 @$(cmd-echo-silent) ' OBJDUMP $@' 190 $(q)$(OBJDUMPcore) -l -x -d $< > $@ 191 192cleanfiles += $(link-out-dir)/tee-pager.bin 193$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 194 @echo Warning: $@ is deprecated 195 @$(cmd-echo-silent) ' GEN $@' 196 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@ 197 198cleanfiles += $(link-out-dir)/tee-pageable.bin 199$(link-out-dir)/tee-pageable.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 200 @echo Warning: $@ is deprecated 201 @$(cmd-echo-silent) ' GEN $@' 202 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pageable_bin $@ 203 204all: $(link-out-dir)/tee.bin 205cleanfiles += $(link-out-dir)/tee.bin 206$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 207 @$(cmd-echo-silent) ' GEN $@' 208 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@ 209 210all: $(link-out-dir)/tee-header_v2.bin 211cleanfiles += $(link-out-dir)/tee-header_v2.bin 212$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \ 213 scripts/gen_tee_bin.py 214 @$(cmd-echo-silent) ' GEN $@' 215 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@ 216 217all: $(link-out-dir)/tee-pager_v2.bin 218cleanfiles += $(link-out-dir)/tee-pager_v2.bin 219$(link-out-dir)/tee-pager_v2.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 220 @$(cmd-echo-silent) ' GEN $@' 221 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pager_v2 $@ 222 223all: $(link-out-dir)/tee-pageable_v2.bin 224cleanfiles += $(link-out-dir)/tee-pageable_v2.bin 225$(link-out-dir)/tee-pageable_v2.bin: $(link-out-dir)/tee.elf \ 226 scripts/gen_tee_bin.py 227 @$(cmd-echo-silent) ' GEN $@' 228 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pageable_v2 $@ 229 230all: $(link-out-dir)/tee.symb_sizes 231cleanfiles += $(link-out-dir)/tee.symb_sizes 232$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf 233 @$(cmd-echo-silent) ' GEN $@' 234 $(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@ 235 236cleanfiles += $(link-out-dir)/tee.mem_usage 237ifneq ($(filter mem_usage,$(MAKECMDGOALS)),) 238mem_usage: $(link-out-dir)/tee.mem_usage 239 240$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf 241 @$(cmd-echo-silent) ' GEN $@' 242 $(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@ 243endif 244 245cleanfiles += $(link-out-dir)/tee-raw.bin 246$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 247 @$(cmd-echo-silent) ' GEN $@' 248 $(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@ 249 250cleanfiles += $(link-out-dir)/tee.srec 251$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin 252 @$(cmd-echo-silent) ' SREC $@' 253 $(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@ 254