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 $@
142
143$(link-out-dir)/version.o:
144	$(call gen-version-o)
145
146-include $(link-out-dir)/.tee.elf.cmd
147define check-link-objs
148$(if $(strip $(filter-out $(link-objs), $(old-link-objs))
149	     $(filter-out $(old-link-objs), $(link-objs))), FORCE_LINK := FORCE)
150endef
151$(eval $(call check-link-objs))
152
153all: $(link-out-dir)/tee.elf
154cleanfiles += $(link-out-dir)/tee.elf $(link-out-dir)/tee.map
155cleanfiles += $(link-out-dir)/version.o
156cleanfiles += $(link-out-dir)/.buildcount
157cleanfiles += $(link-out-dir)/.tee.elf.cmd
158$(link-out-dir)/tee.elf: $(link-objs) $(libdeps) $(link-script-pp) $(FORCE_LINK)
159	@echo "old-link-objs := $(link-objs)" >$(link-out-dir)/.tee.elf.cmd
160	@$(cmd-echo-silent) '  LD      $@'
161	$(q)$(LDcore) $(ldargs-tee.elf) -o $@
162
163all: $(link-out-dir)/tee.dmp
164cleanfiles += $(link-out-dir)/tee.dmp
165$(link-out-dir)/tee.dmp: $(link-out-dir)/tee.elf
166	@$(cmd-echo-silent) '  OBJDUMP $@'
167	$(q)$(OBJDUMPcore) -l -x -d $< > $@
168
169cleanfiles += $(link-out-dir)/tee-pager.bin
170$(link-out-dir)/tee-pager.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py
171	@echo Warning: $@ is deprecated
172	@$(cmd-echo-silent) '  GEN     $@'
173	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pager_bin $@
174
175cleanfiles += $(link-out-dir)/tee-pageable.bin
176$(link-out-dir)/tee-pageable.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py
177	@echo Warning: $@ is deprecated
178	@$(cmd-echo-silent) '  GEN     $@'
179	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_pageable_bin $@
180
181all: $(link-out-dir)/tee.bin
182cleanfiles += $(link-out-dir)/tee.bin
183$(link-out-dir)/tee.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py
184	@$(cmd-echo-silent) '  GEN     $@'
185	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_tee_bin $@
186
187all: $(link-out-dir)/tee-header_v2.bin
188cleanfiles += $(link-out-dir)/tee-header_v2.bin
189$(link-out-dir)/tee-header_v2.bin: $(link-out-dir)/tee.elf \
190				   scripts/gen_tee_bin.py
191	@$(cmd-echo-silent) '  GEN     $@'
192	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_header_v2 $@
193
194all: $(link-out-dir)/tee-pager_v2.bin
195cleanfiles += $(link-out-dir)/tee-pager_v2.bin
196$(link-out-dir)/tee-pager_v2.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py
197	@$(cmd-echo-silent) '  GEN     $@'
198	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pager_v2 $@
199
200all: $(link-out-dir)/tee-pageable_v2.bin
201cleanfiles += $(link-out-dir)/tee-pageable_v2.bin
202$(link-out-dir)/tee-pageable_v2.bin: $(link-out-dir)/tee.elf \
203				     scripts/gen_tee_bin.py
204	@$(cmd-echo-silent) '  GEN     $@'
205	$(q)$(PYTHON3) scripts/gen_tee_bin.py --input $< --out_pageable_v2 $@
206
207all: $(link-out-dir)/tee.symb_sizes
208cleanfiles += $(link-out-dir)/tee.symb_sizes
209$(link-out-dir)/tee.symb_sizes: $(link-out-dir)/tee.elf
210	@$(cmd-echo-silent) '  GEN     $@'
211	$(q)$(NMcore) --print-size --reverse-sort --size-sort $< > $@
212
213cleanfiles += $(link-out-dir)/tee.mem_usage
214ifneq ($(filter mem_usage,$(MAKECMDGOALS)),)
215mem_usage: $(link-out-dir)/tee.mem_usage
216
217$(link-out-dir)/tee.mem_usage: $(link-out-dir)/tee.elf
218	@$(cmd-echo-silent) '  GEN     $@'
219	$(q)$(PYTHON3) ./scripts/mem_usage.py $< > $@
220endif
221
222all: $(link-out-dir)/tee-raw.bin
223cleanfiles += $(link-out-dir)/tee-raw.bin
224$(link-out-dir)/tee-raw.bin: $(link-out-dir)/tee.elf scripts/gen_tee_bin.py
225	@$(cmd-echo-silent) '  GEN     $@'
226	$(q)scripts/gen_tee_bin.py --input $< --out_tee_raw_bin $@
227
228cleanfiles += $(link-out-dir)/tee.srec
229$(link-out-dir)/tee.srec: $(link-out-dir)/tee-raw.bin
230	@$(cmd-echo-silent) '  SREC    $@'
231	$(q)$(OBJCOPYcore) -I binary -O srec $(SRECFLAGS) $< $@
232