[PATCH] compiler-rt: build embedded Darwin variants
Tim Northover
t.p.northover at gmail.com
Thu Nov 14 10:51:07 PST 2013
Ping?
On 11 November 2013 12:16, Tim Northover <t.p.northover at gmail.com> wrote:
> Hi all,
>
> The two patches attached here are intended to produce versions of
> libclang_rt suitable for use in various embedded situations in a
> vaguely Darwin-like environment (i.e. still not __aeabi_*)
>
> 1. Architecture: armv6m, armv7m armv7em, armv7, i386, x86_64
> 2. PICness: we may want to load the resulting program anywhere, or may not care.
> 3. Floatiness: we may want to disallow all FP operations (to save
> context-switching), or it may not matter.
>
> Within these axes, I'm producing basically anything that makes sense
> from a hardware point of view:
>
> libclang_rt.soft_static.a: armv6m, armv7m, armv7em, armv7
> libclang_rt.soft_pic.a: armv6m, armv7m, armv7em, armv7
> libclang_rt.hard_static.a: armv7em, armv7, i386, x86_64
> libclang_rt.hard_pic.a: armv7em, armv7, i386, x86_64
>
> (longer term, it would be good to have soft-float x86 builds but Clang
> currently doesn't honour -msoft-float, so that's not supportable now).
>
> The patches create another make target, "clang_darwin_embedded", to
> deal with these combinations. There's a lot of overlap between this
> and the cc_kext versions in clang_darwin, but they're not quite the
> same thing and trying to solve different problems so I think a
> separate file is justified.
>
> These runtime libraries aren't used automatically yet, but we're
> planning to make driver changes in the near future to make them far
> simpler for programmers.
>
> This is my first foray into compiler-rt and other areas that affect
> install layout, so lots of scrutiny would be welcome.
>
> Should I commit, or change things?
>
> Cheers.
>
> Tim.
-------------- next part --------------
commit 31afdc7aa5106a72954af2f49fba836661f038c5
Author: Tim Northover <tnorthover at apple.com>
Date: Mon Nov 11 12:14:18 2013 -0800
Darwin(ish): enable compiler-rt darwin_embedded builds
diff --git a/runtime/compiler-rt/Makefile b/runtime/compiler-rt/Makefile
index 930a8c2..ab35a4f 100644
--- a/runtime/compiler-rt/Makefile
+++ b/runtime/compiler-rt/Makefile
@@ -78,10 +78,12 @@ ifeq ($(shell test -d $(COMPILERRT_SRC_ROOT) && echo OK),OK)
# support.
RuntimeDirs :=
ifeq ($(OS),Darwin)
-RuntimeDirs += darwin
+RuntimeDirs += darwin darwin_embedded
RuntimeLibrary.darwin.Configs := \
eprintf.a 10.4.a osx.a ios.a cc_kext.a cc_kext_ios5.a \
profile_osx.a profile_ios.a
+RuntimeLibrary.darwin_embedded.Configs := \
+ soft_static.a hard_static.a soft_pic.a hard_pic.a
# Apple Internal: Disable building asan libraries. <rdar://12423266>
# asan_osx_dynamic.dylib ubsan_osx.a
-------------- next part --------------
commit b5f55de70e07f6985d2d076cefa4baffaed0445f
Author: Tim Northover <tnorthover at apple.com>
Date: Tue Oct 29 11:19:45 2013 +0000
Add clang_darwin_embedded platform for OS-level stuff.
diff --git a/lib/arm/Makefile.mk b/lib/arm/Makefile.mk
index 04dec88..a2df115 100644
--- a/lib/arm/Makefile.mk
+++ b/lib/arm/Makefile.mk
@@ -9,7 +9,7 @@
ModuleName := builtins
SubDirs :=
-OnlyArchs := armv5 armv6 armv7 armv7f armv7k armv7s
+OnlyArchs := armv5 armv6 armv7 armv7f armv7k armv7m armv7em armv7s
AsmSources := $(foreach file,$(wildcard $(Dir)/*.S),$(notdir $(file)))
Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))
diff --git a/lib/int_util.c b/lib/int_util.c
index 6d8922a..323e461 100644
--- a/lib/int_util.c
+++ b/lib/int_util.c
@@ -31,7 +31,7 @@ void compilerrt_abort_impl(const char *file, int line, const char *function) {
panic("%s:%d: abort in %s", file, line, function);
}
-#elif __APPLE__ && !__STATIC__
+#elif __APPLE__
/* from libSystem.dylib */
extern void __assert_rtn(const char *func, const char *file,
@@ -45,7 +45,6 @@ void compilerrt_abort_impl(const char *file, int line, const char *function) {
__assert_rtn(function, file, line, "libcompiler_rt abort");
}
-
#else
/* Get the system definition of abort() */
diff --git a/make/platform/clang_darwin_embedded.mk b/make/platform/clang_darwin_embedded.mk
new file mode 100644
index 0000000..edf8198
--- /dev/null
+++ b/make/platform/clang_darwin_embedded.mk
@@ -0,0 +1,270 @@
+# These are the functions which clang needs when it is targetting 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/Darwin
+
+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.
+Configs += soft_static
+UniversalArchs.soft_static := armv6m armv7m armv7em armv7
+
+# 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.
+Configs += hard_static
+UniversalArchs.hard_static := armv7em armv7 i386 x86_64
+
+Configs += soft_pic
+UniversalArchs.soft_pic := armv6m armv7m armv7em armv7
+
+Configs += hard_pic
+UniversalArchs.hard_pic := armv7em armv7 i386 x86_64
+
+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_ARMV7 := -target thumbv7-apple-darwin-eabi
+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)
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