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 34link-ldflags += $(call ld-option,--no-warn-rwx-segments) 35 36link-ldadd = $(LDADD) 37link-ldadd += $(ldflags-external) 38link-ldadd += $(libdeps) 39link-objs := $(filter-out \ 40 $(out-dir)/$(platform-dir)/link_dummies_paged.o \ 41 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 42 $(out-dir)/$(arch-dir)/kernel/link_dummies_paged.o \ 43 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 44 $(objs)) 45link-objs-init := $(filter-out \ 46 $(out-dir)/$(platform-dir)/link_dummies_init.o \ 47 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 48 $(objs)) 49ldargs-tee.elf := $(link-ldflags) $(link-objs) $(link-out-dir)/version.o \ 50 $(link-ldadd) $(libgcccore) 51 52link-script-cppflags := \ 53 $(filter-out $(CPPFLAGS_REMOVE) $(cppflags-remove), \ 54 $(nostdinccore) $(CPPFLAGS) \ 55 $(addprefix -I,$(incdirscore) $(link-out-dir)) \ 56 $(cppflagscore)) 57 58ldargs-all_objs := -T $(link-script-dummy) --no-check-sections \ 59 $(call ld-option,--no-warn-rwx-segments) \ 60 $(link-objs) $(link-ldadd) $(libgcccore) 61cleanfiles += $(link-out-dir)/all_objs.o 62$(link-out-dir)/all_objs.o: $(objs) $(libdeps) $(MAKEFILE_LIST) 63 @$(cmd-echo-silent) ' LD $@' 64 $(q)$(LDcore) $(ldargs-all_objs) -o $@ 65 66cleanfiles += $(link-out-dir)/unpaged_entries.txt 67$(link-out-dir)/unpaged_entries.txt: $(link-out-dir)/all_objs.o 68 @$(cmd-echo-silent) ' GEN $@' 69 $(q)$(NMcore) $< | \ 70 $(AWK) '/ ____keep_pager/ { printf "-u%s ", $$3 }' > $@ 71 72unpaged-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \ 73 $(call ld-option,--no-warn-rwx-segments) 74unpaged-ldadd := $(objs) $(link-ldadd) $(libgcccore) 75cleanfiles += $(link-out-dir)/unpaged.o 76$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt 77 @$(cmd-echo-silent) ' LD $@' 78 $(q)$(LDcore) $(unpaged-ldargs) \ 79 `cat $(link-out-dir)/unpaged_entries.txt` \ 80 $(unpaged-ldadd) -o $@ 81 82cleanfiles += $(link-out-dir)/text_unpaged.ld.S 83$(link-out-dir)/text_unpaged.ld.S: $(link-out-dir)/unpaged.o 84 @$(cmd-echo-silent) ' GEN $@' 85 $(q)$(READELFcore) -S -W $< | \ 86 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 87 88cleanfiles += $(link-out-dir)/rodata_unpaged.ld.S 89$(link-out-dir)/rodata_unpaged.ld.S: $(link-out-dir)/unpaged.o 90 @$(cmd-echo-silent) ' GEN $@' 91 $(q)$(READELFcore) -S -W $< | \ 92 $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 93 94 95cleanfiles += $(link-out-dir)/init_entries.txt 96$(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o 97 @$(cmd-echo-silent) ' GEN $@' 98 $(q)$(NMcore) $< | \ 99 $(AWK) '/ ____keep_init/ { printf "-u%s ", $$3 }' > $@ 100 101init-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections \ 102 $(call ld-option,--no-warn-rwx-segments) 103init-ldadd := $(link-objs-init) $(link-out-dir)/version.o $(link-ldadd) \ 104 $(libgcccore) 105cleanfiles += $(link-out-dir)/init.o 106$(link-out-dir)/init.o: $(link-out-dir)/init_entries.txt 107 $(call gen-version-o) 108 @$(cmd-echo-silent) ' LD $@' 109 $(q)$(LDcore) $(init-ldargs) \ 110 `cat $(link-out-dir)/init_entries.txt` \ 111 $(init-ldadd) -o $@ 112 113cleanfiles += $(link-out-dir)/text_init.ld.S 114$(link-out-dir)/text_init.ld.S: $(link-out-dir)/init.o 115 @$(cmd-echo-silent) ' GEN $@' 116 $(q)$(READELFcore) -S -W $< | \ 117 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 118 119cleanfiles += $(link-out-dir)/rodata_init.ld.S 120$(link-out-dir)/rodata_init.ld.S: $(link-out-dir)/init.o 121 @$(cmd-echo-silent) ' GEN $@' 122 $(q)$(READELFcore) -S -W $< | $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 123 124-include $(link-script-dep) 125 126link-script-extra-deps += $(link-out-dir)/text_unpaged.ld.S 127link-script-extra-deps += $(link-out-dir)/rodata_unpaged.ld.S 128link-script-extra-deps += $(link-out-dir)/text_init.ld.S 129link-script-extra-deps += $(link-out-dir)/rodata_init.ld.S 130link-script-extra-deps += $(conf-file) 131cleanfiles += $(link-script-pp) $(link-script-dep) 132$(link-script-pp): $(link-script) $(link-script-extra-deps) 133 @$(cmd-echo-silent) ' CPP $@' 134 @mkdir -p $(dir $@) 135 $(q)$(CPPcore) -P -MT $@ -MD -MF $(link-script-dep) \ 136 $(link-script-cppflags) $< -o $@ 137 138define update-buildcount 139 @$(cmd-echo-silent) ' UPD $(1)' 140 $(q)if [ ! -f $(1) ]; then \ 141 mkdir -p $(dir $(1)); \ 142 echo 1 >$(1); \ 143 else \ 144 expr 0`cat $(1)` + 1 >$(1); \ 145 fi 146endef 147 148# filter-out to workaround objdump warning 149version-o-cflags = $(filter-out -g3,$(core-platform-cflags) \ 150 $(platform-cflags) $(cflagscore)) 151# SOURCE_DATE_EPOCH defined for reproducible builds 152ifneq ($(SOURCE_DATE_EPOCH),) 153date-opts = -d @$(SOURCE_DATE_EPOCH) 154endif 155DATE_STR = `LC_ALL=C date -u $(date-opts)` 156BUILD_COUNT_STR = `cat $(link-out-dir)/.buildcount` 157CORE_CC_VERSION = `$(CCcore) -v 2>&1 | grep "version " | sed 's/ *$$//'` 158define gen-version-o 159 $(call update-buildcount,$(link-out-dir)/.buildcount) 160 @$(cmd-echo-silent) ' GEN $(link-out-dir)/version.o' 161 $(q)echo -e "const char core_v_str[] =" \ 162 "\"$(TEE_IMPL_VERSION) \"" \ 163 "\"($(CORE_CC_VERSION)) \"" \ 164 "\"#$(BUILD_COUNT_STR) \"" \ 165 "\"$(DATE_STR) \"" \ 166 "\"$(CFG_KERN_LINKER_ARCH)\";\n" \ 167 | $(CCcore) $(version-o-cflags) \ 168 -xc - -c -o $(link-out-dir)/version.o 169endef 170$(link-out-dir)/version.o: 171 $(call gen-version-o) 172 173-include $(link-out-dir)/.tee.elf.cmd 174define check-link-objs 175$(if $(strip $(filter-out $(link-objs), $(old-link-objs)) 176 $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE) 177endef 178$(eval $(call check-link-objs)) 179 180all: $(link-out-dir)/tee.elf 181cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map 182cleanfiles += $(link-out-dir)/version.o 183cleanfiles += $(link-out-dir)/.buildcount 184cleanfiles += $(link-out-dir)/.tee.elf.cmd 185$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK) 186 @echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd 187 @$(cmd-echo-silent) ' LD $@' 188 $(q)$(LDcore) $(ldargs-tee.elf) -o $@ 189 190all: $(link-out-dir)/tee.dmp 191cleanfiles += $(link-out-dir)/tee.dmp 192$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf 193 @$(cmd-echo-silent) ' OBJDUMP $@' 194 $(q)$(OBJDUMPcore) -l -x -d $< > $@ 195 196cleanfiles += $(link-out-dir)/tee-pager.bin 197$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 198 @echo Warning: $@ is deprecated 199 @$(cmd-echo-silent) ' GEN $@' 200 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@ 201 202cleanfiles += $(link-out-dir)/tee-pageable.bin 203$(link-out-dir)/tee-pageable.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_pageable_bin $@ 207 208all: $(link-out-dir)/tee.bin 209cleanfiles += $(link-out-dir)/tee.bin 210$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 211 @$(cmd-echo-silent) ' GEN $@' 212 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@ 213 214all: $(link-out-dir)/tee-header_v2.bin 215cleanfiles += $(link-out-dir)/tee-header_v2.bin 216$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \ 217 scripts/gen_tee_bin.py 218 @$(cmd-echo-silent) ' GEN $@' 219 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@ 220 221all: $(link-out-dir)/tee-pager_v2.bin 222cleanfiles += $(link-out-dir)/tee-pager_v2.bin 223$(link-out-dir)/tee-pager_v2.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 224 @$(cmd-echo-silent) ' GEN $@' 225 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pager_v2 $@ 226 227all: $(link-out-dir)/tee-pageable_v2.bin 228cleanfiles += $(link-out-dir)/tee-pageable_v2.bin 229$(link-out-dir)/tee-pageable_v2.bin: $(link-out-dir)/tee.elf \ 230 scripts/gen_tee_bin.py 231 @$(cmd-echo-silent) ' GEN $@' 232 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pageable_v2 $@ 233 234all: $(link-out-dir)/tee.symb_sizes 235cleanfiles += $(link-out-dir)/tee.symb_sizes 236$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf 237 @$(cmd-echo-silent) ' GEN $@' 238 $(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@ 239 240cleanfiles += $(link-out-dir)/tee.mem_usage 241ifneq ($(filter mem_usage,$(MAKECMDGOALS)),) 242mem_usage: $(link-out-dir)/tee.mem_usage 243 244$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf 245 @$(cmd-echo-silent) ' GEN $@' 246 $(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@ 247endif 248 249cleanfiles += $(link-out-dir)/tee-raw.bin 250$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 251 @$(cmd-echo-silent) ' GEN $@' 252 $(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@ 253 254cleanfiles += $(link-out-dir)/tee.srec 255$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin 256 @$(cmd-echo-silent) ' SREC $@' 257 $(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@ 258