From ac1643e6e68697e6ee374535dd98413c92224076 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Sun, 19 Apr 2015 15:16:23 -0700 Subject: [PATCH] compiler-rt: support a new embedded linux target Upstream-Status: Pending Signed-off-by: Khem Raj --- .../make/platform/clang_linux_embedded.mk | 286 ++++++++++++++++++ .../clang_linux_embedded_test_input.c | 0 2 files changed, 286 insertions(+) create mode 100644 compiler-rt/make/platform/clang_linux_embedded.mk create mode 100644 compiler-rt/make/platform/clang_linux_embedded_test_input.c diff --git a/compiler-rt/make/platform/clang_linux_embedded.mk b/compiler-rt/make/platform/clang_linux_embedded.mk new file mode 100644 index 000000000000..d0a890075a1c --- /dev/null +++ b/compiler-rt/make/platform/clang_linux_embedded.mk @@ -0,0 +1,286 @@ +# These are the functions which clang needs when it is targeting a previous +# version of the OS. The issue is that the backend may use functions which were +# not present in the libgcc that shipped on the platform. In such cases, we link +# with a version of the library which contains private_extern definitions of all +# the extra functions which might be referenced. + +Description := Static runtime libraries for embedded clang/Linux + +# A function that ensures we don't try to build for architectures that we +# don't have working toolchains for. +CheckArches = \ + $(shell \ + result=""; \ + for arch in $(1); do \ + if $(CC) -arch $$arch -c \ + -integrated-as \ + $(ProjSrcRoot)/make/platform/clang_linux_embedded_test_input.c \ + -o /dev/null > /dev/null 2> /dev/null; then \ + result="$$result$$arch "; \ + else \ + printf 1>&2 \ + "warning: clang_linux_embedded.mk: dropping arch '$$arch' from lib '$(2)'\n"; \ + fi; \ + done; \ + echo $$result) + +XCRun = \ + $(shell \ + result=`xcrun -find $(1) 2> /dev/null`; \ + if [ "$$?" != "0" ]; then result=$(1); fi; \ + echo $$result) + +### + +CC := $(call XCRun,clang) +AR := $(call XCRun,ar) +RANLIB := $(call XCRun,ranlib) +STRIP := $(call XCRun,strip) +LIPO := $(call XCRun,lipo) +DSYMUTIL := $(call XCRun,dsymutil) +Configs := +UniversalArchs := + +# Soft-float version of the runtime. No floating-point instructions will be used +# and the ABI (out of necessity) passes floating values in normal registers: +# non-VFP variant of the AAPCS. +UniversalArchs.soft_static := $(call CheckArches,arm armv7m armv7em armv7,soft_static) +Configs += $(if $(UniversalArchs.soft_static),soft_static) + +# Hard-float version of the runtime. On ARM VFP instructions and registers are +# allowed, and floating point values get passed in them. VFP variant of the +# AAPCS. +UniversalArchs.hard_static := $(call CheckArches,armv7em armv7 i386 x86_64,hard_static) +Configs += $(if $(UniversalArchs.hard_static),hard_static) + +UniversalArchs.soft_pic := $(call CheckArches,armv6m armv7m armv7em armv7,soft_pic) +Configs += $(if $(UniversalArchs.soft_pic),soft_pic) + +UniversalArchs.hard_pic := $(call CheckArches,armv7em armv7 i386 x86_64,hard_pic) +Configs += $(if $(UniversalArchs.hard_pic),hard_pic) + +CFLAGS := -Wall -Werror -Oz -fomit-frame-pointer -ffreestanding + +PIC_CFLAGS := -fPIC +STATIC_CFLAGS := -static + +CFLAGS_SOFT := -mfloat-abi=soft +CFLAGS_HARD := -mfloat-abi=hard + +CFLAGS_I386 := -march=pentium + +CFLAGS.soft_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_SOFT) +CFLAGS.hard_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_HARD) +CFLAGS.soft_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_SOFT) +CFLAGS.hard_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_HARD) + +CFLAGS.soft_static.armv7 := $(CFLAGS.soft_static) $(CFLAGS_ARMV7) +CFLAGS.hard_static.armv7 := $(CFLAGS.hard_static) $(CFLAGS_ARMV7) +CFLAGS.soft_pic.armv7 := $(CFLAGS.soft_pic) $(CFLAGS_ARMV7) +CFLAGS.hard_pic.armv7 := $(CFLAGS.hard_pic) $(CFLAGS_ARMV7) + +# x86 platforms ignore -mfloat-abi options and complain about doing so. Despite +# this they're hard-float. +CFLAGS.hard_static.i386 := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_I386) +CFLAGS.hard_pic.i386 := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_I386) +CFLAGS.hard_static.x86_64 := $(CFLAGS) $(STATIC_CFLAGS) +CFLAGS.hard_pic.x86_64 := $(CFLAGS) $(PIC_CFLAGS) + +# Functions not wanted: +# + eprintf is obsolete anyway +# + *vfp: designed for Thumb1 CPUs with VFPv2 + +COMMON_FUNCTIONS := \ + absvdi2 \ + absvsi2 \ + addvdi3 \ + addvsi3 \ + ashldi3 \ + ashrdi3 \ + bswapdi2 \ + bswapsi2 \ + clzdi2 \ + clzsi2 \ + cmpdi2 \ + ctzdi2 \ + ctzsi2 \ + divdc3 \ + divdi3 \ + divsc3 \ + divmodsi4 \ + udivmodsi4 \ + do_global_dtors \ + ffsdi2 \ + fixdfdi \ + fixsfdi \ + fixunsdfdi \ + fixunsdfsi \ + fixunssfdi \ + fixunssfsi \ + floatdidf \ + floatdisf \ + floatundidf \ + floatundisf \ + gcc_bcmp \ + lshrdi3 \ + moddi3 \ + muldc3 \ + muldi3 \ + mulsc3 \ + mulvdi3 \ + mulvsi3 \ + negdi2 \ + negvdi2 \ + negvsi2 \ + paritydi2 \ + paritysi2 \ + popcountdi2 \ + popcountsi2 \ + powidf2 \ + powisf2 \ + subvdi3 \ + subvsi3 \ + ucmpdi2 \ + udiv_w_sdiv \ + udivdi3 \ + udivmoddi4 \ + umoddi3 \ + adddf3 \ + addsf3 \ + cmpdf2 \ + cmpsf2 \ + div0 \ + divdf3 \ + divsf3 \ + divsi3 \ + extendsfdf2 \ + ffssi2 \ + fixdfsi \ + fixsfsi \ + floatsidf \ + floatsisf \ + floatunsidf \ + floatunsisf \ + comparedf2 \ + comparesf2 \ + modsi3 \ + muldf3 \ + mulsf3 \ + negdf2 \ + negsf2 \ + subdf3 \ + subsf3 \ + truncdfsf2 \ + udivsi3 \ + umodsi3 \ + unorddf2 \ + unordsf2 + +ARM_FUNCTIONS := \ + aeabi_cdcmpeq \ + aeabi_cdrcmple \ + aeabi_cfcmpeq \ + aeabi_cfrcmple \ + aeabi_dcmpeq \ + aeabi_dcmpge \ + aeabi_dcmpgt \ + aeabi_dcmple \ + aeabi_dcmplt \ + aeabi_drsub \ + aeabi_fcmpeq \ + aeabi_fcmpge \ + aeabi_fcmpgt \ + aeabi_fcmple \ + aeabi_fcmplt \ + aeabi_frsub \ + aeabi_idivmod \ + aeabi_uidivmod \ + +# ARM Assembly implementation which requires Thumb2 (i.e. won't work on v6M). +THUMB2_FUNCTIONS := \ + switch16 \ + switch32 \ + switch8 \ + switchu8 \ + sync_fetch_and_add_4 \ + sync_fetch_and_sub_4 \ + sync_fetch_and_and_4 \ + sync_fetch_and_or_4 \ + sync_fetch_and_xor_4 \ + sync_fetch_and_nand_4 \ + sync_fetch_and_max_4 \ + sync_fetch_and_umax_4 \ + sync_fetch_and_min_4 \ + sync_fetch_and_umin_4 \ + sync_fetch_and_add_8 \ + sync_fetch_and_sub_8 \ + sync_fetch_and_and_8 \ + sync_fetch_and_or_8 \ + sync_fetch_and_xor_8 \ + sync_fetch_and_nand_8 \ + sync_fetch_and_max_8 \ + sync_fetch_and_umax_8 \ + sync_fetch_and_min_8 \ + sync_fetch_and_umin_8 + +I386_FUNCTIONS := \ + i686.get_pc_thunk.eax \ + i686.get_pc_thunk.ebp \ + i686.get_pc_thunk.ebx \ + i686.get_pc_thunk.ecx \ + i686.get_pc_thunk.edi \ + i686.get_pc_thunk.edx \ + i686.get_pc_thunk.esi + +# FIXME: Currently, compiler-rt is missing implementations for a number of the +# functions. Filter them out for now. +MISSING_FUNCTIONS := \ + cmpdf2 cmpsf2 div0 \ + ffssi2 \ + udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \ + bswapsi2 \ + gcc_bcmp \ + do_global_dtors \ + i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \ + i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \ + i686.get_pc_thunk.esi \ + aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \ + aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub \ + aeabi_fcmpeq \ aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt \ + aeabi_frsub aeabi_idivmod aeabi_uidivmod + +FUNCTIONS_ARMV6M := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS) +FUNCTIONS_ARM_ALL := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS) $(THUMB2_FUNCTIONS) +FUNCTIONS_I386 := $(COMMON_FUNCTIONS) $(I386_FUNCTIONS) +FUNCTIONS_X86_64 := $(COMMON_FUNCTIONS) + +FUNCTIONS_ARMV6M := \ + $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARMV6M)) +FUNCTIONS_ARM_ALL := \ + $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARM_ALL)) +FUNCTIONS_I386 := \ + $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_I386)) +FUNCTIONS_X86_64 := \ + $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_X86_64)) + +FUNCTIONS.soft_static.armv6m := $(FUNCTIONS_ARMV6M) +FUNCTIONS.soft_pic.armv6m := $(FUNCTIONS_ARMV6M) + +FUNCTIONS.soft_static.armv7m := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.soft_pic.armv7m := $(FUNCTIONS_ARM_ALL) + +FUNCTIONS.soft_static.armv7em := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.hard_static.armv7em := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.soft_pic.armv7em := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.hard_pic.armv7em := $(FUNCTIONS_ARM_ALL) + +FUNCTIONS.soft_static.armv7 := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.hard_static.armv7 := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.soft_pic.armv7 := $(FUNCTIONS_ARM_ALL) +FUNCTIONS.hard_pic.armv7 := $(FUNCTIONS_ARM_ALL) + +FUNCTIONS.hard_static.i386 := $(FUNCTIONS_I386) +FUNCTIONS.hard_pic.i386 := $(FUNCTIONS_I386) + +FUNCTIONS.hard_static.x86_64 := $(FUNCTIONS_X86_64) +FUNCTIONS.hard_pic.x86_64 := $(FUNCTIONS_X86_64) diff --git a/compiler-rt/make/platform/clang_linux_embedded_test_input.c b/compiler-rt/make/platform/clang_linux_embedded_test_input.c new file mode 100644 index 000000000000..e69de29bb2d1