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 notext -z norelro $(ldflag-apply-dynamic-relocs) 15endif 16ifeq ($(CFG_CORE_BTI),y) 17# force-bti tells the linker to warn if some object files lack the .note.gnu.property 18# section with the BTI flag, and to turn on the BTI flag in the output anyway. The 19# resulting executable would likely fail at runtime so we use this flag along 20# with the --fatal-warnings below to check and prevent this situation (with useful 21# diagnostics). 22link-ldflags += $(call ld-option,-z force-bti) --fatal-warnings 23endif 24link-ldflags += -T $(link-script-pp) -Map=$(link-out-dir)/tee.map 25link-ldflags += --sort-section=alignment 26link-ldflags += --fatal-warnings 27link-ldflags += --gc-sections 28 29link-ldadd = $(LDADD) 30link-ldadd += $(ldflags-external) 31link-ldadd += $(libdeps) 32link-objs := $(filter-out \ 33 $(out-dir)/$(arch-dir)/kernel/link_dummies_paged.o \ 34 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 35 $(objs)) 36link-objs-init := $(filter-out \ 37 $(out-dir)/$(arch-dir)/kernel/link_dummies_init.o, \ 38 $(objs)) 39ldargs-tee.elf := $(link-ldflags) $(link-objs) $(link-out-dir)/version.o \ 40 $(link-ldadd) $(libgcccore) 41 42link-script-cppflags := \ 43 $(filter-out $(CPPFLAGS_REMOVE) $(cppflags-remove), \ 44 $(nostdinccore) $(CPPFLAGS) \ 45 $(addprefix -I,$(incdirscore) $(link-out-dir)) \ 46 $(cppflagscore)) 47 48ldargs-all_objs := -T $(link-script-dummy) --no-check-sections \ 49 $(link-objs) $(link-ldadd) $(libgcccore) 50cleanfiles += $(link-out-dir)/all_objs.o 51$(link-out-dir)/all_objs.o: $(objs) $(libdeps) $(MAKEFILE_LIST) 52 @$(cmd-echo-silent) ' LD $@' 53 $(q)$(LDcore) $(ldargs-all_objs) -o $@ 54 55cleanfiles += $(link-out-dir)/unpaged_entries.txt 56$(link-out-dir)/unpaged_entries.txt: $(link-out-dir)/all_objs.o 57 @$(cmd-echo-silent) ' GEN $@' 58 $(q)$(NMcore) $< | \ 59 $(AWK) '/ ____keep_pager/ { printf "-u%s ", $$3 }' > $@ 60 61unpaged-ldargs = -T $(link-script-dummy) --no-check-sections --gc-sections 62unpaged-ldadd := $(objs) $(link-ldadd) $(libgcccore) 63cleanfiles += $(link-out-dir)/unpaged.o 64$(link-out-dir)/unpaged.o: $(link-out-dir)/unpaged_entries.txt 65 @$(cmd-echo-silent) ' LD $@' 66 $(q)$(LDcore) $(unpaged-ldargs) \ 67 `cat $(link-out-dir)/unpaged_entries.txt` \ 68 $(unpaged-ldadd) -o $@ 69 70cleanfiles += $(link-out-dir)/text_unpaged.ld.S 71$(link-out-dir)/text_unpaged.ld.S: $(link-out-dir)/unpaged.o 72 @$(cmd-echo-silent) ' GEN $@' 73 $(q)$(READELFcore) -S -W $< | \ 74 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 75 76cleanfiles += $(link-out-dir)/rodata_unpaged.ld.S 77$(link-out-dir)/rodata_unpaged.ld.S: $(link-out-dir)/unpaged.o 78 @$(cmd-echo-silent) ' GEN $@' 79 $(q)$(READELFcore) -S -W $< | \ 80 $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 81 82 83cleanfiles += $(link-out-dir)/init_entries.txt 84$(link-out-dir)/init_entries.txt: $(link-out-dir)/all_objs.o 85 @$(cmd-echo-silent) ' GEN $@' 86 $(q)$(NMcore) $< | \ 87 $(AWK) '/ ____keep_init/ { printf "-u%s ", $$3 }' > $@ 88 89init-ldargs := -T $(link-script-dummy) --no-check-sections --gc-sections 90init-ldadd := $(link-objs-init) $(link-out-dir)/version.o $(link-ldadd) \ 91 $(libgcccore) 92cleanfiles += $(link-out-dir)/init.o 93$(link-out-dir)/init.o: $(link-out-dir)/init_entries.txt 94 $(call gen-version-o) 95 @$(cmd-echo-silent) ' LD $@' 96 $(q)$(LDcore) $(init-ldargs) \ 97 `cat $(link-out-dir)/init_entries.txt` \ 98 $(init-ldadd) -o $@ 99 100cleanfiles += $(link-out-dir)/text_init.ld.S 101$(link-out-dir)/text_init.ld.S: $(link-out-dir)/init.o 102 @$(cmd-echo-silent) ' GEN $@' 103 $(q)$(READELFcore) -S -W $< | \ 104 $(PYTHON3) ./scripts/gen_ld_sects.py .text. > $@ 105 106cleanfiles += $(link-out-dir)/rodata_init.ld.S 107$(link-out-dir)/rodata_init.ld.S: $(link-out-dir)/init.o 108 @$(cmd-echo-silent) ' GEN $@' 109 $(q)$(READELFcore) -S -W $< | $(PYTHON3) ./scripts/gen_ld_sects.py .rodata. > $@ 110 111-include $(link-script-dep) 112 113link-script-extra-deps += $(link-out-dir)/text_unpaged.ld.S 114link-script-extra-deps += $(link-out-dir)/rodata_unpaged.ld.S 115link-script-extra-deps += $(link-out-dir)/text_init.ld.S 116link-script-extra-deps += $(link-out-dir)/rodata_init.ld.S 117link-script-extra-deps += $(conf-file) 118cleanfiles += $(link-script-pp) $(link-script-dep) 119$(link-script-pp): $(link-script) $(link-script-extra-deps) 120 @$(cmd-echo-silent) ' CPP $@' 121 @mkdir -p $(dir $@) 122 $(q)$(CPPcore) -P -MT $@ -MD -MF $(link-script-dep) \ 123 $(link-script-cppflags) $< -o $@ 124 125define update-buildcount 126 @$(cmd-echo-silent) ' UPD $(1)' 127 $(q)if [ ! -f $(1) ]; then \ 128 mkdir -p $(dir $(1)); \ 129 echo 1 >$(1); \ 130 else \ 131 expr 0`cat $(1)` + 1 >$(1); \ 132 fi 133endef 134 135# filter-out to workaround objdump warning 136version-o-cflags = $(filter-out -g3,$(core-platform-cflags) \ 137 $(platform-cflags) $(cflagscore)) 138# SOURCE_DATE_EPOCH defined for reproducible builds 139ifneq ($(SOURCE_DATE_EPOCH),) 140date-opts = -d @$(SOURCE_DATE_EPOCH) 141endif 142DATE_STR = `LANG=C date -u $(date-opts)` 143BUILD_COUNT_STR = `cat $(link-out-dir)/.buildcount` 144CORE_CC_VERSION = `$(CCcore) -v 2>&1 | grep "version " | sed 's/ *$$//'` 145define gen-version-o 146 $(call update-buildcount,$(link-out-dir)/.buildcount) 147 @$(cmd-echo-silent) ' GEN $(link-out-dir)/version.o' 148 $(q)echo -e "const char core_v_str[] =" \ 149 "\"$(TEE_IMPL_VERSION) \"" \ 150 "\"($(CORE_CC_VERSION)) \"" \ 151 "\"#$(BUILD_COUNT_STR) \"" \ 152 "\"$(DATE_STR) \"" \ 153 "\"$(CFG_KERN_LINKER_ARCH)\";\n" \ 154 | $(CCcore) $(version-o-cflags) \ 155 -xc - -c -o $(link-out-dir)/version.o 156endef 157$(link-out-dir)/version.o: 158 $(call gen-version-o) 159 160-include $(link-out-dir)/.tee.elf.cmd 161define check-link-objs 162$(if $(strip $(filter-out $(link-objs), $(old-link-objs)) 163 $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE) 164endef 165$(eval $(call check-link-objs)) 166 167all: $(link-out-dir)/tee.elf 168cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map 169cleanfiles += $(link-out-dir)/version.o 170cleanfiles += $(link-out-dir)/.buildcount 171cleanfiles += $(link-out-dir)/.tee.elf.cmd 172$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK) 173 @echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd 174 @$(cmd-echo-silent) ' LD $@' 175 $(q)$(LDcore) $(ldargs-tee.elf) -o $@ 176 177all: $(link-out-dir)/tee.dmp 178cleanfiles += $(link-out-dir)/tee.dmp 179$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf 180 @$(cmd-echo-silent) ' OBJDUMP $@' 181 $(q)$(OBJDUMPcore) -l -x -d $< > $@ 182 183cleanfiles += $(link-out-dir)/tee-pager.bin 184$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 185 @echo Warning: $@ is deprecated 186 @$(cmd-echo-silent) ' GEN $@' 187 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@ 188 189cleanfiles += $(link-out-dir)/tee-pageable.bin 190$(link-out-dir)/tee-pageable.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 191 @echo Warning: $@ is deprecated 192 @$(cmd-echo-silent) ' GEN $@' 193 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pageable_bin $@ 194 195all: $(link-out-dir)/tee.bin 196cleanfiles += $(link-out-dir)/tee.bin 197$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 198 @$(cmd-echo-silent) ' GEN $@' 199 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@ 200 201all: $(link-out-dir)/tee-header_v2.bin 202cleanfiles += $(link-out-dir)/tee-header_v2.bin 203$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \ 204 scripts/gen_tee_bin.py 205 @$(cmd-echo-silent) ' GEN $@' 206 $(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@ 207 208all: $(link-out-dir)/tee-pager_v2.bin 209cleanfiles += $(link-out-dir)/tee-pager_v2.bin 210$(link-out-dir)/tee-pager_v2.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_pager_v2 $@ 213 214all: $(link-out-dir)/tee-pageable_v2.bin 215cleanfiles += $(link-out-dir)/tee-pageable_v2.bin 216$(link-out-dir)/tee-pageable_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_pageable_v2 $@ 220 221all: $(link-out-dir)/tee.symb_sizes 222cleanfiles += $(link-out-dir)/tee.symb_sizes 223$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf 224 @$(cmd-echo-silent) ' GEN $@' 225 $(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@ 226 227cleanfiles += $(link-out-dir)/tee.mem_usage 228ifneq ($(filter mem_usage,$(MAKECMDGOALS)),) 229mem_usage: $(link-out-dir)/tee.mem_usage 230 231$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf 232 @$(cmd-echo-silent) ' GEN $@' 233 $(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@ 234endif 235 236cleanfiles += $(link-out-dir)/tee-raw.bin 237$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py 238 @$(cmd-echo-silent) ' GEN $@' 239 $(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@ 240 241cleanfiles += $(link-out-dir)/tee.srec 242$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin 243 @$(cmd-echo-silent) ' SREC $@' 244 $(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@ 245