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) $(libgcccore) 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) $(libgcccore) 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 ", $$3 }' > $@ 76 77unpaged-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \ 78 $(link-ldflags-common) 79unpaged-ldadd := $(objs) $(link-ldadd) $(libgcccore) 80cleanfiles += $(link-out-dir)/unpaged.o 81$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt 82 @$(cmd-echo-silent) ' LD $@' 83 $(q)$(LDcore) $(unpaged-ldargs) \ 84 `cat $(link-out-dir)/unpaged_entries.txt` \ 85 $(unpaged-ldadd) -o $@ 86 87cleanfiles += $(link-out-dir)/text_unpaged.ld.S 88$(link-out-dir)/text_unpaged.ld.S: $(link-out-dir)/unpaged.o 89 @$(cmd-echo-silent) ' GEN $@' 90 $(q)$(READELFcore) -S -W $< | \ 91 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 92 93cleanfiles += $(link-out-dir)/rodata_unpaged.ld.S 94$(link-out-dir)/rodata_unpaged.ld.S: $(link-out-dir)/unpaged.o 95 @$(cmd-echo-silent) ' GEN $@' 96 $(q)$(READELFcore) -S -W $< | \ 97 $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 98 99 100cleanfiles += $(link-out-dir)/init_entries.txt 101$(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o 102 @$(cmd-echo-silent) ' GEN $@' 103 $(q)$(NMcore) $< | \ 104 $(AWK) '/ ____keep_init/ { printf "-u%s ", $$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) \ 109 $(libgcccore) 110cleanfiles += $(link-out-dir)/init.o 111$(link-out-dir)/init.o: $(link-out-dir)/init_entries.txt 112 $(call gen-version-o) 113 @$(cmd-echo-silent) ' LD $@' 114 $(q)$(LDcore) $(init-ldargs) \ 115 `cat $(link-out-dir)/init_entries.txt` \ 116 $(init-ldadd) -o $@ 117 118cleanfiles += $(link-out-dir)/text_init.ld.S 119$(link-out-dir)/text_init.ld.S: $(link-out-dir)/init.o 120 @$(cmd-echo-silent) ' GEN $@' 121 $(q)$(READELFcore) -S -W $< | \ 122 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 123 124cleanfiles += $(link-out-dir)/rodata_init.ld.S 125$(link-out-dir)/rodata_init.ld.S: $(link-out-dir)/init.o 126 @$(cmd-echo-silent) ' GEN $@' 127 $(q)$(READELFcore) -S -W $< | $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 128 129-include $(link-script-dep) 130 131link-script-extra-deps += $(link-out-dir)/text_unpaged.ld.S 132link-script-extra-deps += $(link-out-dir)/rodata_unpaged.ld.S 133link-script-extra-deps += $(link-out-dir)/text_init.ld.S 134link-script-extra-deps += $(link-out-dir)/rodata_init.ld.S 135link-script-extra-deps += $(conf-file) 136cleanfiles += $(link-script-pp) $(link-script-dep) 137$(link-script-pp): $(link-script) $(link-script-extra-deps) 138 @$(cmd-echo-silent) ' CPP $@' 139 @mkdir -p $(dir $@) 140 $(q)$(CPPcore) -P -MT $@ -MD -MF $(link-script-dep) \ 141 $(link-script-cppflags) $< -o $@ 142 143define update-buildcount 144 @$(cmd-echo-silent) ' UPD $(1)' 145 $(q)if [ ! -f $(1) ]; then \ 146 mkdir -p $(dir $(1)); \ 147 echo 1 >$(1); \ 148 else \ 149 expr 0`cat $(1)` + 1 >$(1); \ 150 fi 151endef 152 153# filter-out to workaround objdump warning 154version-o-cflags = $(filter-out -g3,$(CFLAGS) $(core-platform-cflags) \ 155 $(platform-cflags) $(cflagscore)) 156# SOURCE_DATE_EPOCH defined for reproducible builds 157ifneq ($(SOURCE_DATE_EPOCH),) 158date-opts = -d @$(SOURCE_DATE_EPOCH) 159endif 160DATE_STR = `LC_ALL=C date -u $(date-opts)` 161BUILD_COUNT_STR = `cat $(link-out-dir)/.buildcount` 162CORE_CC_VERSION = `$(CCcore) -v 2>&1 | grep "version " | sed 's/ *$$//'` 163define gen-version-o 164 $(call update-buildcount,$(link-out-dir)/.buildcount) 165 @$(cmd-echo-silent) ' GEN $(link-out-dir)/version.o' 166 $(q)cd $(link-out-dir) && \ 167 echo -e "const char core_v_str[] =" \ 168 "\"$(TEE_IMPL_VERSION) \"" \ 169 "\"($(CORE_CC_VERSION)) \"" \ 170 "\"#$(BUILD_COUNT_STR) \"" \ 171 "\"$(DATE_STR) \"" \ 172 "\"$(CFG_KERN_LINKER_ARCH)\";\n" \ 173 | $(CCcore) $(version-o-cflags) \ 174 -xc - -c -o version.o 175endef 176$(link-out-dir)/version.o: 177 $(call gen-version-o) 178 179-include $(link-out-dir)/.tee.elf.cmd 180define check-link-objs 181$(if $(strip $(filter-out $(link-objs), $(old-link-objs)) 182 $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE) 183endef 184$(eval $(call check-link-objs)) 185 186all: $(link-out-dir)/tee.elf 187cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map 188cleanfiles += $(link-out-dir)/version.o 189cleanfiles += $(link-out-dir)/.buildcount 190cleanfiles += $(link-out-dir)/.tee.elf.cmd 191$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK) 192 @echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd 193 @$(cmd-echo-silent) ' LD $@' 194 $(q)$(LDcore) $(ldargs-tee.elf) -o $@ 195 196all: $(link-out-dir)/tee.dmp 197cleanfiles += $(link-out-dir)/tee.dmp 198$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf 199 @$(cmd-echo-silent) ' OBJDUMP $@' 200 $(q)$(OBJDUMPcore) -l -x -d $< > $@ 201 202cleanfiles += $(link-out-dir)/tee-pager.bin 203$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 204 @echo Warning: $@ is deprecated 205 @$(cmd-echo-silent) ' GEN $@' 206 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@ 207 208cleanfiles += $(link-out-dir)/tee-pageable.bin 209$(link-out-dir)/tee-pageable.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 210 @echo Warning: $@ is deprecated 211 @$(cmd-echo-silent) ' GEN $@' 212 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pageable_bin $@ 213 214all: $(link-out-dir)/tee.bin 215cleanfiles += $(link-out-dir)/tee.bin 216$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 217 @$(cmd-echo-silent) ' GEN $@' 218 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@ 219 220all: $(link-out-dir)/tee-header_v2.bin 221cleanfiles += $(link-out-dir)/tee-header_v2.bin 222$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \ 223 scripts/gen_tee_bin.py 224 @$(cmd-echo-silent) ' GEN $@' 225 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@ 226 227all: $(link-out-dir)/tee-pager_v2.bin 228cleanfiles += $(link-out-dir)/tee-pager_v2.bin 229$(link-out-dir)/tee-pager_v2.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 230 @$(cmd-echo-silent) ' GEN $@' 231 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pager_v2 $@ 232 233all: $(link-out-dir)/tee-pageable_v2.bin 234cleanfiles += $(link-out-dir)/tee-pageable_v2.bin 235$(link-out-dir)/tee-pageable_v2.bin: $(link-out-dir)/tee.elf \ 236 scripts/gen_tee_bin.py 237 @$(cmd-echo-silent) ' GEN $@' 238 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pageable_v2 $@ 239 240all: $(link-out-dir)/tee.symb_sizes 241cleanfiles += $(link-out-dir)/tee.symb_sizes 242$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf 243 @$(cmd-echo-silent) ' GEN $@' 244 $(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@ 245 246cleanfiles += $(link-out-dir)/tee.mem_usage 247ifneq ($(filter mem_usage,$(MAKECMDGOALS)),) 248mem_usage: $(link-out-dir)/tee.mem_usage 249 250$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf 251 @$(cmd-echo-silent) ' GEN $@' 252 $(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@ 253endif 254 255all: $(link-out-dir)/tee-raw.bin 256cleanfiles += $(link-out-dir)/tee-raw.bin 257$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 258 @$(cmd-echo-silent) ' GEN $@' 259 $(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@ 260 261cleanfiles += $(link-out-dir)/tee.srec 262$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin 263 @$(cmd-echo-silent) ' SREC $@' 264 $(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@ 265