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      1 # These are the functions which clang needs when it is targeting a previous
      2 # version of the OS. The issue is that the backend may use functions which were
      3 # not present in the libgcc that shipped on the platform. In such cases, we link
      4 # with a version of the library which contains private_extern definitions of all
      5 # the extra functions which might be referenced.
      6 
      7 Description := Static runtime libraries for embedded clang/Darwin
      8 
      9 # A function that ensures we don't try to build for architectures that we
     10 # don't have working toolchains for.
     11 CheckArches = \
     12   $(shell \
     13     result=""; \
     14     for arch in $(1); do \
     15       if $(CC) -arch $$arch -c \
     16 	  -integrated-as \
     17 	  $(ProjSrcRoot)/make/platform/clang_macho_embedded_test_input.c \
     18 	  -o /dev/null > /dev/null 2> /dev/null; then \
     19         result="$$result$$arch "; \
     20       else \
     21 	printf 1>&2 \
     22 	  "warning: clang_macho_embedded.mk: dropping arch '$$arch' from lib '$(2)'\n"; \
     23       fi; \
     24     done; \
     25     echo $$result)
     26 
     27 XCRun = \
     28   $(shell \
     29     result=`xcrun -find $(1) 2> /dev/null`; \
     30     if [ "$$?" != "0" ]; then result=$(1); fi; \
     31     echo $$result)
     32 
     33 ###
     34 
     35 CC       := $(call XCRun,clang)
     36 AR       := $(call XCRun,ar)
     37 RANLIB   := $(call XCRun,ranlib)
     38 STRIP    := $(call XCRun,strip)
     39 LIPO     := $(call XCRun,lipo)
     40 DSYMUTIL := $(call XCRun,dsymutil)
     41 
     42 Configs :=
     43 UniversalArchs :=
     44 
     45 # Soft-float version of the runtime. No floating-point instructions will be used
     46 # and the ABI (out of necessity) passes floating values in normal registers:
     47 # non-VFP variant of the AAPCS.
     48 UniversalArchs.soft_static := $(call CheckArches,armv6m armv7m armv7em armv7,soft_static)
     49 Configs += $(if $(UniversalArchs.soft_static),soft_static)
     50 
     51 # Hard-float version of the runtime. On ARM VFP instructions and registers are
     52 # allowed, and floating point values get passed in them. VFP variant of the
     53 # AAPCS.
     54 UniversalArchs.hard_static := $(call CheckArches,armv7em armv7 i386 x86_64,hard_static)
     55 Configs += $(if $(UniversalArchs.hard_static),hard_static)
     56 
     57 UniversalArchs.soft_pic := $(call CheckArches,armv6m armv7m armv7em armv7,soft_pic)
     58 Configs += $(if $(UniversalArchs.soft_pic),soft_pic)
     59 
     60 UniversalArchs.hard_pic := $(call CheckArches,armv7em armv7 i386 x86_64,hard_pic)
     61 Configs += $(if $(UniversalArchs.hard_pic),hard_pic)
     62 
     63 CFLAGS := -Wall -Werror -Oz -fomit-frame-pointer -ffreestanding
     64 
     65 PIC_CFLAGS := -fPIC
     66 STATIC_CFLAGS := -static
     67 
     68 CFLAGS_SOFT := -mfloat-abi=soft
     69 CFLAGS_HARD := -mfloat-abi=hard
     70 
     71 CFLAGS_ARMV7 := -target thumbv7-apple-darwin-eabi
     72 CFLAGS_I386  := -march=pentium
     73 
     74 CFLAGS.soft_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_SOFT)
     75 CFLAGS.hard_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_HARD)
     76 CFLAGS.soft_pic    := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_SOFT)
     77 CFLAGS.hard_pic    := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_HARD)
     78 
     79 CFLAGS.soft_static.armv7 := $(CFLAGS.soft_static) $(CFLAGS_ARMV7)
     80 CFLAGS.hard_static.armv7 := $(CFLAGS.hard_static) $(CFLAGS_ARMV7)
     81 CFLAGS.soft_pic.armv7    := $(CFLAGS.soft_pic) $(CFLAGS_ARMV7)
     82 CFLAGS.hard_pic.armv7    := $(CFLAGS.hard_pic) $(CFLAGS_ARMV7)
     83 
     84 # x86 platforms ignore -mfloat-abi options and complain about doing so. Despite
     85 # this they're hard-float.
     86 CFLAGS.hard_static.i386   := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_I386)
     87 CFLAGS.hard_pic.i386      := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_I386)
     88 CFLAGS.hard_static.x86_64 := $(CFLAGS) $(STATIC_CFLAGS)
     89 CFLAGS.hard_pic.x86_64    := $(CFLAGS) $(PIC_CFLAGS)
     90 
     91 # Functions not wanted:
     92 #   + eprintf is obsolete anyway
     93 #   + *vfp: designed for Thumb1 CPUs with VFPv2
     94 
     95 COMMON_FUNCTIONS := \
     96 	absvdi2 \
     97 	absvsi2 \
     98 	addvdi3 \
     99 	addvsi3 \
    100 	ashldi3 \
    101 	ashrdi3 \
    102 	bswapdi2 \
    103 	bswapsi2 \
    104 	clzdi2 \
    105 	clzsi2 \
    106 	cmpdi2 \
    107 	ctzdi2 \
    108 	ctzsi2 \
    109 	divdc3 \
    110 	divdi3 \
    111 	divsc3 \
    112 	divmodsi4 \
    113 	udivmodsi4 \
    114 	do_global_dtors \
    115 	ffsdi2 \
    116 	fixdfdi \
    117 	fixsfdi \
    118 	fixunsdfdi \
    119 	fixunsdfsi \
    120 	fixunssfdi \
    121 	fixunssfsi \
    122 	floatdidf \
    123 	floatdisf \
    124 	floatundidf \
    125 	floatundisf \
    126 	gcc_bcmp \
    127 	lshrdi3 \
    128 	moddi3 \
    129 	muldc3 \
    130 	muldi3 \
    131 	mulsc3 \
    132 	mulvdi3 \
    133 	mulvsi3 \
    134 	negdi2 \
    135 	negvdi2 \
    136 	negvsi2 \
    137 	paritydi2 \
    138 	paritysi2 \
    139 	popcountdi2 \
    140 	popcountsi2 \
    141 	powidf2 \
    142 	powisf2 \
    143 	subvdi3 \
    144 	subvsi3 \
    145 	ucmpdi2 \
    146 	udiv_w_sdiv \
    147 	udivdi3 \
    148 	udivmoddi4 \
    149 	umoddi3 \
    150 	adddf3 \
    151 	addsf3 \
    152 	cmpdf2 \
    153 	cmpsf2 \
    154 	div0 \
    155 	divdf3 \
    156 	divsf3 \
    157 	divsi3 \
    158 	extendsfdf2 \
    159 	extendhfsf2 \
    160 	ffssi2 \
    161 	fixdfsi \
    162 	fixsfsi \
    163 	floatsidf \
    164 	floatsisf \
    165 	floatunsidf \
    166 	floatunsisf \
    167 	comparedf2 \
    168 	comparesf2 \
    169 	modsi3 \
    170 	muldf3 \
    171 	mulsf3 \
    172 	negdf2 \
    173 	negsf2 \
    174 	subdf3 \
    175 	subsf3 \
    176 	truncdfhf2 \
    177 	truncdfsf2 \
    178 	truncsfhf2 \
    179 	udivsi3 \
    180 	umodsi3 \
    181 	unorddf2 \
    182 	unordsf2 \
    183 	atomic_flag_clear \
    184 	atomic_flag_clear_explicit \
    185 	atomic_flag_test_and_set \
    186 	atomic_flag_test_and_set_explicit \
    187 	atomic_signal_fence \
    188 	atomic_thread_fence
    189 
    190 ARM_FUNCTIONS := \
    191 	aeabi_cdcmpeq \
    192 	aeabi_cdrcmple \
    193 	aeabi_cfcmpeq \
    194 	aeabi_cfrcmple \
    195 	aeabi_dcmpeq \
    196 	aeabi_dcmpge \
    197 	aeabi_dcmpgt \
    198 	aeabi_dcmple \
    199 	aeabi_dcmplt \
    200 	aeabi_drsub \
    201 	aeabi_fcmpeq \
    202 	aeabi_fcmpge \
    203 	aeabi_fcmpgt \
    204 	aeabi_fcmple \
    205 	aeabi_fcmplt \
    206 	aeabi_frsub \
    207 	aeabi_idivmod \
    208 	aeabi_uidivmod \
    209 
    210 # ARM Assembly implementation which requires Thumb2 (i.e. won't work on v6M).
    211 THUMB2_FUNCTIONS := \
    212 	switch16 \
    213 	switch32 \
    214 	switch8 \
    215 	switchu8 \
    216 	sync_fetch_and_add_4 \
    217 	sync_fetch_and_sub_4 \
    218 	sync_fetch_and_and_4 \
    219 	sync_fetch_and_or_4 \
    220 	sync_fetch_and_xor_4 \
    221 	sync_fetch_and_nand_4 \
    222 	sync_fetch_and_max_4 \
    223 	sync_fetch_and_umax_4 \
    224 	sync_fetch_and_min_4 \
    225 	sync_fetch_and_umin_4 \
    226 	sync_fetch_and_add_8 \
    227 	sync_fetch_and_sub_8 \
    228 	sync_fetch_and_and_8 \
    229 	sync_fetch_and_or_8 \
    230 	sync_fetch_and_xor_8 \
    231 	sync_fetch_and_nand_8 \
    232 	sync_fetch_and_max_8 \
    233 	sync_fetch_and_umax_8 \
    234 	sync_fetch_and_min_8 \
    235 	sync_fetch_and_umin_8
    236 
    237 I386_FUNCTIONS :=  \
    238 	i686.get_pc_thunk.eax \
    239 	i686.get_pc_thunk.ebp \
    240 	i686.get_pc_thunk.ebx \
    241 	i686.get_pc_thunk.ecx \
    242 	i686.get_pc_thunk.edi \
    243 	i686.get_pc_thunk.edx \
    244 	i686.get_pc_thunk.esi
    245 
    246 # FIXME: Currently, compiler-rt is missing implementations for a number of the
    247 # functions. Filter them out for now.
    248 MISSING_FUNCTIONS := \
    249 	cmpdf2 cmpsf2 div0 \
    250 	ffssi2 \
    251 	udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \
    252 	bswapsi2 \
    253 	gcc_bcmp \
    254 	do_global_dtors \
    255 	i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \
    256 	i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \
    257 	i686.get_pc_thunk.esi \
    258 	aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \
    259 	aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub \
    260 	aeabi_fcmpeq \ aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt \
    261 	aeabi_frsub aeabi_idivmod aeabi_uidivmod
    262 
    263 FUNCTIONS_ARMV6M  := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS)
    264 FUNCTIONS_ARM_ALL := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS) $(THUMB2_FUNCTIONS)
    265 FUNCTIONS_I386    := $(COMMON_FUNCTIONS) $(I386_FUNCTIONS)
    266 FUNCTIONS_X86_64  := $(COMMON_FUNCTIONS)
    267 
    268 FUNCTIONS_ARMV6M := \
    269 	$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARMV6M))
    270 FUNCTIONS_ARM_ALL := \
    271 	$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARM_ALL))
    272 FUNCTIONS_I386 := \
    273 	$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_I386))
    274 FUNCTIONS_X86_64 := \
    275 	$(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_X86_64))
    276 
    277 FUNCTIONS.soft_static.armv6m := $(FUNCTIONS_ARMV6M)
    278 FUNCTIONS.soft_pic.armv6m    := $(FUNCTIONS_ARMV6M)
    279 
    280 FUNCTIONS.soft_static.armv7m := $(FUNCTIONS_ARM_ALL)
    281 FUNCTIONS.soft_pic.armv7m    := $(FUNCTIONS_ARM_ALL)
    282 
    283 FUNCTIONS.soft_static.armv7em := $(FUNCTIONS_ARM_ALL)
    284 FUNCTIONS.hard_static.armv7em := $(FUNCTIONS_ARM_ALL)
    285 FUNCTIONS.soft_pic.armv7em    := $(FUNCTIONS_ARM_ALL)
    286 FUNCTIONS.hard_pic.armv7em    := $(FUNCTIONS_ARM_ALL)
    287 
    288 FUNCTIONS.soft_static.armv7 := $(FUNCTIONS_ARM_ALL)
    289 FUNCTIONS.hard_static.armv7 := $(FUNCTIONS_ARM_ALL)
    290 FUNCTIONS.soft_pic.armv7    := $(FUNCTIONS_ARM_ALL)
    291 FUNCTIONS.hard_pic.armv7    := $(FUNCTIONS_ARM_ALL)
    292 
    293 FUNCTIONS.hard_static.i386 := $(FUNCTIONS_I386)
    294 FUNCTIONS.hard_pic.i386    := $(FUNCTIONS_I386)
    295 
    296 FUNCTIONS.hard_static.x86_64 := $(FUNCTIONS_X86_64)
    297 FUNCTIONS.hard_pic.x86_64    := $(FUNCTIONS_X86_64)
    298