From bc650811b01223a3414803a681d9cc702e913667 Mon Sep 17 00:00:00 2001
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From: Khem Raj <raj.khem@gmail.com>
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Date: Sun, 19 Apr 2015 15:16:23 -0700
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Subject: [PATCH] compiler-rt: support a new embedded linux target
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Signed-off-by: Khem Raj <raj.khem@gmail.com>
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---
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.../make/platform/clang_linux_embedded.mk | 286 ++++++++++++++++++
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.../clang_linux_embedded_test_input.c | 0
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2 files changed, 286 insertions(+)
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create mode 100644 compiler-rt/make/platform/clang_linux_embedded.mk
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create mode 100644 compiler-rt/make/platform/clang_linux_embedded_test_input.c
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diff --git a/compiler-rt/make/platform/clang_linux_embedded.mk b/compiler-rt/make/platform/clang_linux_embedded.mk
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new file mode 100644
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index 000000000000..d0a890075a1c
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--- /dev/null
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+++ b/compiler-rt/make/platform/clang_linux_embedded.mk
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@@ -0,0 +1,286 @@
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+# These are the functions which clang needs when it is targeting a previous
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+# version of the OS. The issue is that the backend may use functions which were
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+# not present in the libgcc that shipped on the platform. In such cases, we link
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+# with a version of the library which contains private_extern definitions of all
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+# the extra functions which might be referenced.
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+
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+Description := Static runtime libraries for embedded clang/Linux
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+
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+# A function that ensures we don't try to build for architectures that we
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+# don't have working toolchains for.
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+CheckArches = \
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+ $(shell \
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+ result=""; \
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+ for arch in $(1); do \
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+ if $(CC) -arch $$arch -c \
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+ -integrated-as \
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+ $(ProjSrcRoot)/make/platform/clang_linux_embedded_test_input.c \
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+ -o /dev/null > /dev/null 2> /dev/null; then \
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+ result="$$result$$arch "; \
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+ else \
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+ printf 1>&2 \
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+ "warning: clang_linux_embedded.mk: dropping arch '$$arch' from lib '$(2)'\n"; \
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+ fi; \
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+ done; \
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+ echo $$result)
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+
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+XCRun = \
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+ $(shell \
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+ result=`xcrun -find $(1) 2> /dev/null`; \
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+ if [ "$$?" != "0" ]; then result=$(1); fi; \
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+ echo $$result)
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+
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+###
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+
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+CC := $(call XCRun,clang)
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+AR := $(call XCRun,ar)
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+RANLIB := $(call XCRun,ranlib)
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+STRIP := $(call XCRun,strip)
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+LIPO := $(call XCRun,lipo)
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+DSYMUTIL := $(call XCRun,dsymutil)
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+Configs :=
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+UniversalArchs :=
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+
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+# Soft-float version of the runtime. No floating-point instructions will be used
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+# and the ABI (out of necessity) passes floating values in normal registers:
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+# non-VFP variant of the AAPCS.
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+UniversalArchs.soft_static := $(call CheckArches,arm armv7m armv7em armv7,soft_static)
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+Configs += $(if $(UniversalArchs.soft_static),soft_static)
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+
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+# Hard-float version of the runtime. On ARM VFP instructions and registers are
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+# allowed, and floating point values get passed in them. VFP variant of the
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+# AAPCS.
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+UniversalArchs.hard_static := $(call CheckArches,armv7em armv7 i386 x86_64,hard_static)
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+Configs += $(if $(UniversalArchs.hard_static),hard_static)
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+
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+UniversalArchs.soft_pic := $(call CheckArches,armv6m armv7m armv7em armv7,soft_pic)
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+Configs += $(if $(UniversalArchs.soft_pic),soft_pic)
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+
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+UniversalArchs.hard_pic := $(call CheckArches,armv7em armv7 i386 x86_64,hard_pic)
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+Configs += $(if $(UniversalArchs.hard_pic),hard_pic)
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+
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+CFLAGS := -Wall -Werror -Oz -fomit-frame-pointer -ffreestanding
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+
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+PIC_CFLAGS := -fPIC
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+STATIC_CFLAGS := -static
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+
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+CFLAGS_SOFT := -mfloat-abi=soft
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+CFLAGS_HARD := -mfloat-abi=hard
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+
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+CFLAGS_I386 := -march=pentium
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+
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+CFLAGS.soft_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_SOFT)
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+CFLAGS.hard_static := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_HARD)
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+CFLAGS.soft_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_SOFT)
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+CFLAGS.hard_pic := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_HARD)
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+
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+CFLAGS.soft_static.armv7 := $(CFLAGS.soft_static) $(CFLAGS_ARMV7)
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+CFLAGS.hard_static.armv7 := $(CFLAGS.hard_static) $(CFLAGS_ARMV7)
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+CFLAGS.soft_pic.armv7 := $(CFLAGS.soft_pic) $(CFLAGS_ARMV7)
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+CFLAGS.hard_pic.armv7 := $(CFLAGS.hard_pic) $(CFLAGS_ARMV7)
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+
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+# x86 platforms ignore -mfloat-abi options and complain about doing so. Despite
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+# this they're hard-float.
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+CFLAGS.hard_static.i386 := $(CFLAGS) $(STATIC_CFLAGS) $(CFLAGS_I386)
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+CFLAGS.hard_pic.i386 := $(CFLAGS) $(PIC_CFLAGS) $(CFLAGS_I386)
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+CFLAGS.hard_static.x86_64 := $(CFLAGS) $(STATIC_CFLAGS)
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+CFLAGS.hard_pic.x86_64 := $(CFLAGS) $(PIC_CFLAGS)
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+
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+# Functions not wanted:
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+# + eprintf is obsolete anyway
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+# + *vfp: designed for Thumb1 CPUs with VFPv2
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+
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+COMMON_FUNCTIONS := \
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+ absvdi2 \
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+ absvsi2 \
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+ addvdi3 \
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+ addvsi3 \
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+ ashldi3 \
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+ ashrdi3 \
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+ bswapdi2 \
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+ bswapsi2 \
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+ clzdi2 \
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+ clzsi2 \
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+ cmpdi2 \
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+ ctzdi2 \
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+ ctzsi2 \
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+ divdc3 \
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+ divdi3 \
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+ divsc3 \
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+ divmodsi4 \
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+ udivmodsi4 \
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+ do_global_dtors \
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+ ffsdi2 \
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+ fixdfdi \
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+ fixsfdi \
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+ fixunsdfdi \
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+ fixunsdfsi \
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+ fixunssfdi \
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+ fixunssfsi \
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+ floatdidf \
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+ floatdisf \
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+ floatundidf \
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+ floatundisf \
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+ gcc_bcmp \
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+ lshrdi3 \
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+ moddi3 \
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+ muldc3 \
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+ muldi3 \
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+ mulsc3 \
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+ mulvdi3 \
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+ mulvsi3 \
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+ negdi2 \
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+ negvdi2 \
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+ negvsi2 \
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+ paritydi2 \
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+ paritysi2 \
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+ popcountdi2 \
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+ popcountsi2 \
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+ powidf2 \
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+ powisf2 \
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+ subvdi3 \
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+ subvsi3 \
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+ ucmpdi2 \
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+ udiv_w_sdiv \
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+ udivdi3 \
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+ udivmoddi4 \
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+ umoddi3 \
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+ adddf3 \
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+ addsf3 \
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+ cmpdf2 \
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+ cmpsf2 \
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+ div0 \
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+ divdf3 \
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+ divsf3 \
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+ divsi3 \
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+ extendsfdf2 \
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+ ffssi2 \
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+ fixdfsi \
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+ fixsfsi \
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+ floatsidf \
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+ floatsisf \
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+ floatunsidf \
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+ floatunsisf \
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+ comparedf2 \
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+ comparesf2 \
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+ modsi3 \
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+ muldf3 \
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+ mulsf3 \
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+ negdf2 \
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+ negsf2 \
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+ subdf3 \
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+ subsf3 \
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+ truncdfsf2 \
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+ udivsi3 \
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+ umodsi3 \
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+ unorddf2 \
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+ unordsf2
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+
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+ARM_FUNCTIONS := \
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+ aeabi_cdcmpeq \
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+ aeabi_cdrcmple \
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+ aeabi_cfcmpeq \
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+ aeabi_cfrcmple \
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+ aeabi_dcmpeq \
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+ aeabi_dcmpge \
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+ aeabi_dcmpgt \
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+ aeabi_dcmple \
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+ aeabi_dcmplt \
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+ aeabi_drsub \
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+ aeabi_fcmpeq \
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+ aeabi_fcmpge \
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+ aeabi_fcmpgt \
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+ aeabi_fcmple \
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+ aeabi_fcmplt \
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+ aeabi_frsub \
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+ aeabi_idivmod \
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+ aeabi_uidivmod \
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+
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+# ARM Assembly implementation which requires Thumb2 (i.e. won't work on v6M).
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+THUMB2_FUNCTIONS := \
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+ switch16 \
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+ switch32 \
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+ switch8 \
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+ switchu8 \
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+ sync_fetch_and_add_4 \
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+ sync_fetch_and_sub_4 \
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+ sync_fetch_and_and_4 \
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+ sync_fetch_and_or_4 \
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+ sync_fetch_and_xor_4 \
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+ sync_fetch_and_nand_4 \
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+ sync_fetch_and_max_4 \
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+ sync_fetch_and_umax_4 \
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+ sync_fetch_and_min_4 \
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+ sync_fetch_and_umin_4 \
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+ sync_fetch_and_add_8 \
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+ sync_fetch_and_sub_8 \
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+ sync_fetch_and_and_8 \
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+ sync_fetch_and_or_8 \
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+ sync_fetch_and_xor_8 \
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+ sync_fetch_and_nand_8 \
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+ sync_fetch_and_max_8 \
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+ sync_fetch_and_umax_8 \
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+ sync_fetch_and_min_8 \
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+ sync_fetch_and_umin_8
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+
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+I386_FUNCTIONS := \
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+ i686.get_pc_thunk.eax \
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+ i686.get_pc_thunk.ebp \
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+ i686.get_pc_thunk.ebx \
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+ i686.get_pc_thunk.ecx \
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+ i686.get_pc_thunk.edi \
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+ i686.get_pc_thunk.edx \
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+ i686.get_pc_thunk.esi
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+
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+# FIXME: Currently, compiler-rt is missing implementations for a number of the
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+# functions. Filter them out for now.
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+MISSING_FUNCTIONS := \
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+ cmpdf2 cmpsf2 div0 \
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+ ffssi2 \
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+ udiv_w_sdiv unorddf2 unordsf2 bswapdi2 \
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+ bswapsi2 \
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+ gcc_bcmp \
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+ do_global_dtors \
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+ i686.get_pc_thunk.eax i686.get_pc_thunk.ebp i686.get_pc_thunk.ebx \
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+ i686.get_pc_thunk.ecx i686.get_pc_thunk.edi i686.get_pc_thunk.edx \
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+ i686.get_pc_thunk.esi \
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+ aeabi_cdcmpeq aeabi_cdrcmple aeabi_cfcmpeq aeabi_cfrcmple aeabi_dcmpeq \
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+ aeabi_dcmpge aeabi_dcmpgt aeabi_dcmple aeabi_dcmplt aeabi_drsub \
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+ aeabi_fcmpeq \ aeabi_fcmpge aeabi_fcmpgt aeabi_fcmple aeabi_fcmplt \
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+ aeabi_frsub aeabi_idivmod aeabi_uidivmod
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+
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+FUNCTIONS_ARMV6M := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS)
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+FUNCTIONS_ARM_ALL := $(COMMON_FUNCTIONS) $(ARM_FUNCTIONS) $(THUMB2_FUNCTIONS)
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+FUNCTIONS_I386 := $(COMMON_FUNCTIONS) $(I386_FUNCTIONS)
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+FUNCTIONS_X86_64 := $(COMMON_FUNCTIONS)
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+
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+FUNCTIONS_ARMV6M := \
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+ $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARMV6M))
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+FUNCTIONS_ARM_ALL := \
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+ $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_ARM_ALL))
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+FUNCTIONS_I386 := \
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+ $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_I386))
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+FUNCTIONS_X86_64 := \
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+ $(filter-out $(MISSING_FUNCTIONS),$(FUNCTIONS_X86_64))
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+
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+FUNCTIONS.soft_static.armv6m := $(FUNCTIONS_ARMV6M)
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+FUNCTIONS.soft_pic.armv6m := $(FUNCTIONS_ARMV6M)
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+
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+FUNCTIONS.soft_static.armv7m := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.soft_pic.armv7m := $(FUNCTIONS_ARM_ALL)
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+
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+FUNCTIONS.soft_static.armv7em := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.hard_static.armv7em := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.soft_pic.armv7em := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.hard_pic.armv7em := $(FUNCTIONS_ARM_ALL)
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+
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+FUNCTIONS.soft_static.armv7 := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.hard_static.armv7 := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.soft_pic.armv7 := $(FUNCTIONS_ARM_ALL)
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+FUNCTIONS.hard_pic.armv7 := $(FUNCTIONS_ARM_ALL)
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+
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+FUNCTIONS.hard_static.i386 := $(FUNCTIONS_I386)
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+FUNCTIONS.hard_pic.i386 := $(FUNCTIONS_I386)
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+
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+FUNCTIONS.hard_static.x86_64 := $(FUNCTIONS_X86_64)
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+FUNCTIONS.hard_pic.x86_64 := $(FUNCTIONS_X86_64)
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diff --git a/compiler-rt/make/platform/clang_linux_embedded_test_input.c b/compiler-rt/make/platform/clang_linux_embedded_test_input.c
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new file mode 100644
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index 000000000000..e69de29bb2d1
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