Generate llvm-bitcode at build-time

Run:
make \
  CLANG=1 \
  FUCHSIA=1 \
  TOOLCHAIN_PREFIX=your/toolchain \
  LIBGCC=your/gcclib \
  ARCH_x86_64_TOOLCHAIN_PREFIX=your/toolchain

make -f llvm-bitcode.mk

output: all.o

kernel/engine.mk

@@ -76,19 +76,23 @@ GLOBAL_COMPILEFLAGS += -Wall -Wextra -Wno-multichar -Werror -Wno-unused-paramete
 ifeq ($(CLANG),1)
 GLOBAL_COMPILEFLAGS += -Wno-error
 endif
-GLOBAL_CFLAGS := --std=c11 -Werror-implicit-function-declaration -Wstrict-prototypes -Wwrite-strings
+#GLOBAL_CFLAGS := --std=c11 -Werror-implicit-function-declaration -Wstrict-prototypes -Wwrite-strings
+GLOBAL_CFLAGS := --std=c11 -Werror-implicit-function-declaration -Wstrict-prototypes -Wwrite-strings -S -emit-llvm
+
 # Note: Both -fno-exceptions and -fno-asynchronous-unwind-tables is needed
 # in order to stop gcc from emitting .eh_frame (which is part of the loaded
 # image by default).
-GLOBAL_CPPFLAGS := --std=c++11 -fno-exceptions -fno-asynchronous-unwind-tables -fno-rtti -fno-threadsafe-statics -Wconversion
+GLOBAL_CPPFLAGS := --std=c++11 -fno-exceptions -fno-asynchronous-unwind-tables -fno-rtti -fno-threadsafe-statics -Wconversion -S -emit-llvm
 #GLOBAL_CPPFLAGS += -Weffc++
-GLOBAL_ASMFLAGS := -DASSEMBLY
+GLOBAL_ASMFLAGS := -DASSEMBLY -S -emit-llvm
 GLOBAL_LDFLAGS := -nostdlib $(addprefix -L,$(LKINC))
 GLOBAL_MODULE_LDFLAGS :=
 
 # Kernel compile flags
 KERNEL_COMPILEFLAGS := -ffreestanding -include $(KERNEL_CONFIG_HEADER)
+#KERNEL_CFLAGS := --analyze -Xclang -analyzer-checker=security.insecureAPI.vfork
 KERNEL_CFLAGS :=
+#KERNEL_CPPFLAGS := -Xclang -analyze -Xclang -analyzer-checker=security.insecureAPI.vfork
 KERNEL_CPPFLAGS :=
 KERNEL_ASMFLAGS :=
 
@@ -303,7 +307,8 @@ else
 CC := $(CCACHE) $(TOOLCHAIN_PREFIX)gcc
 AR := $(TOOLCHAIN_PREFIX)ar
 endif
-LD := $(TOOLCHAIN_PREFIX)ld
+#LD := $(TOOLCHAIN_PREFIX)ld
+LD := true
 OBJDUMP := $(TOOLCHAIN_PREFIX)objdump
 OBJCOPY := $(TOOLCHAIN_PREFIX)objcopy
 CPPFILT := $(TOOLCHAIN_PREFIX)c++filt

kernel/lib/userboot/bootfs.S

@@ -12,7 +12,7 @@
 
 // include the bootfs archive containing a user file system
 DATA(user_bootfs)
-.incbin USER_BOOTFS_FILENAME
+#.incbin USER_BOOTFS_FILENAME
 END(user_bootfs)
 
 .Luser_bootfs_end:

kernel/make/build.mk

@@ -24,46 +24,46 @@ endif
 
 $(OUTLKBIN): $(OUTLKELF)
 	@echo generating image: $@
-	$(NOECHO)$(OBJCOPY) -O binary $< $@
+#	$(NOECHO)$(OBJCOPY) -O binary $< $@
 
 $(OUTLKELF).hex: $(OUTLKELF)
 	@echo generating hex file: $@
-	$(NOECHO)$(OBJCOPY) -O ihex $< $@
+#	$(NOECHO)$(OBJCOPY) -O ihex $< $@
 
 $(OUTLKELF): $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LINKER_SCRIPT)
 	@echo linking $@
-	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -dT $(LINKER_SCRIPT) \
+#	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -dT $(LINKER_SCRIPT) \
 		$(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LIBGCC) -o $@
-	$(NOECHO)$(SIZECMD) -t --common $(sort $(ALLMODULE_OBJS)) $(EXTRA_OBJS)
-	$(NOECHO)$(SIZECMD) $@
+#	$(NOECHO)$(SIZECMD) -t --common $(sort $(ALLMODULE_OBJS)) $(EXTRA_OBJS)
+#	$(NOECHO)$(SIZECMD) $@
 
 $(OUTLKELF).sym: $(OUTLKELF)
 	@echo generating symbols: $@
-	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) > $@
+#	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) > $@
 
 $(OUTLKELF).sym.sorted: $(OUTLKELF)
 	@echo generating sorted symbols: $@
-	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) | sort > $@
+#	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) | sort > $@
 
 $(OUTLKELF).lst: $(OUTLKELF)
 	@echo generating listing: $@
-	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -d $< | $(CPPFILT) > $@
+#	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -d $< | $(CPPFILT) > $@
 
 $(OUTLKELF).debug.lst: $(OUTLKELF)
 	@echo generating listing: $@
-	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -S $< | $(CPPFILT) > $@
+#	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -S $< | $(CPPFILT) > $@
 
 $(OUTLKELF).dump: $(OUTLKELF)
 	@echo generating objdump: $@
-	$(NOECHO)$(OBJDUMP) -x $< > $@
+#	$(NOECHO)$(OBJDUMP) -x $< > $@
 
 $(OUTLKELF).size: $(OUTLKELF)
 	@echo generating size map: $@
-	$(NOECHO)$(NM) -S --size-sort $< > $@
+#	$(NOECHO)$(NM) -S --size-sort $< > $@
 
 $(OUTLKELF)-gdb.py: scripts/$(LKNAME).elf-gdb.py
 	@echo generating $@
-	$(NOECHO)cp -f $< $@
+#	$(NOECHO)cp -f $< $@
 
 # print some information about the build
 #$(BUILDDIR)/srcfiles.txt:
@@ -88,28 +88,27 @@ $(OUTLKELF)-gdb.py: scripts/$(LKNAME).elf-gdb.py
 # so they will be reflected in the $^ expansion of the link line
 $(BUILDDIR)/%.elf:: $(BUILDDIR)/%.mod.o $(USER_LINKER_SCRIPT)
 	@echo linking $@
-	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -T $(USER_LINKER_SCRIPT) $(ARCH_LDFLAGS) \
+#	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -T $(USER_LINKER_SCRIPT) $(ARCH_LDFLAGS) \
 		$(filter-out $(USER_LINKER_SCRIPT),$^) $(LIBGCC) -o $@
 
 $(BUILDDIR)/%.elf.dump: $(BUILDDIR)/%.elf
 	@echo generating $@
-	$(NOECHO)$(OBJDUMP) -x $< > $@
+#	$(NOECHO)$(OBJDUMP) -x $< > $@
 
 $(BUILDDIR)/%.elf.lst: $(BUILDDIR)/%.elf
 	@echo generating $@
-	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -d $< > $@
+#	$(NOECHO)$(OBJDUMP) $(OBJDUMP_LIST_FLAGS) -d $< > $@
 
 $(BUILDDIR)/%.elf.strip: $(BUILDDIR)/%.elf
 	@echo generating $@
-	$(NOECHO)$(STRIP) -d $< -o $@
+#	$(NOECHO)$(STRIP) -d $< -o $@
 
 # generate a new manifest and compare to see if it differs from the previous one
 .PHONY: usermanifestfile
 $(USER_MANIFEST): usermanifestfile
 	@echo generating $@
-	@$(MKDIR)
-	$(NOECHO)echo $(USER_MANIFEST_LINES) | tr ' ' '\n' | sort > $@.tmp
-	$(NOECHO)$(call TESTANDREPLACEFILE,$@.tmp,$@)
+#	$(NOECHO)echo $(USER_MANIFEST_LINES) | tr ' ' '\n' | sort > $@.tmp
+#	$(NOECHO)$(call TESTANDREPLACEFILE,$@.tmp,$@)
 
 GENERATED += $(USER_MANIFEST)
 
@@ -132,16 +131,16 @@ USER_MANIFEST_DEPS := $(foreach x,$(USER_MANIFEST_LINES),$(lastword $(subst =,$(
 
 $(USER_BOOTFS): $(MKBOOTFS) $(BOOTSERVER) $(LOGLISTENER) $(USER_MANIFEST) $(USER_MANIFEST_DEPS)
 	@echo generating $@
-	@$(MKDIR)
-	$(NOECHO)$(MKBOOTFS) -o $(USER_BOOTFS) $(USER_MANIFEST)
+#	@$(MKDIR)
+#	$(NOECHO)$(MKBOOTFS) -o $(USER_BOOTFS) $(USER_MANIFEST)
 
 GENERATED += $(USER_BOOTFS)
 
 # build userspace filesystem image
 $(USER_FS): $(USER_BOOTFS)
 	@echo generating $@
-	$(NOECHO)dd if=/dev/zero of=$@ bs=1048576 count=16
-	$(NOECHO)dd if=$(USER_BOOTFS) of=$@ conv=notrunc
+#	$(NOECHO)dd if=/dev/zero of=$@ bs=1048576 count=16
+#	$(NOECHO)dd if=$(USER_BOOTFS) of=$@ conv=notrunc
 
 # add the fs image to the clean list
 GENERATED += $(USER_FS)

kernel/make/compile.mk

@@ -40,7 +40,7 @@ $(MODULE_OBJS): MODULE_SRCDEPS:=$(MODULE_SRCDEPS)
 
 $(MODULE_COBJS): $(MODULE_BUILDDIR)/%.c.o: %.c $(MODULE_SRCDEPS)
 	@$(MKDIR)
-	@echo compiling $<
+	@echo compilingg $<
 	$(NOECHO)$(CC) $(GLOBAL_OPTFLAGS) $(MODULE_OPTFLAGS) $(GLOBAL_COMPILEFLAGS) $(KERNEL_COMPILEFLAGS) $(ARCH_COMPILEFLAGS) $(MODULE_COMPILEFLAGS) $(GLOBAL_CFLAGS) $(KERNEL_CFLAGS) $(ARCH_CFLAGS) $(MODULE_CFLAGS) $(GLOBAL_INCLUDES) -c $< -MD -MP -MT $@ -MF $(@:%o=%d) -o $@
 
 $(MODULE_CPPOBJS): $(MODULE_BUILDDIR)/%.cpp.o: %.cpp $(MODULE_SRCDEPS)

kernel/make/module.mk

@@ -131,9 +131,9 @@ endif
 # build a ld -r style combined object
 MODULE_OBJECT := $(MODULE_OUTNAME).mod.o
 $(MODULE_OBJECT): $(MODULE_OBJS) $(MODULE_EXTRA_OBJS)
-	@$(MKDIR)
+#	@$(MKDIR)
 	@echo linking $@
-	$(NOECHO)$(LD) $(GLOBAL_MODULE_LDFLAGS) -r $^ -o $@
+#	$(NOECHO)$(LD) $(GLOBAL_MODULE_LDFLAGS) -r $^ -o $@
 
 # track all of the source files compiled
 ALLSRCS += $(MODULE_SRCS)
@@ -178,10 +178,10 @@ endif
 # build static library
 MODULE_STATIC_LIB := $(MODULE_LIBNAME).a
 $(MODULE_STATIC_LIB): $(MODULE_LIBRARY_OBJS)
-	@$(MKDIR)
-	@echo linking $@
-	@rm -f $@
-	$(NOECHO)$(AR) cr $@ $^
+#	@$(MKDIR)
+#	@echo linking $@
+#	@rm -f $@
+#	$(NOECHO)$(AR) cr $@ $^
 
 # always build all libraries
 EXTRA_BUILDDEPS += $(MODULE_STATIC_LIB)

llvm-bitcode.mk

@@ -0,0 +1,8 @@
+rwildcard=$(wildcard $1$2) $(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2))
+ALL_C_OBJ := $(call rwildcard,build-magenta-qemu-x86-64/,*.c.o)
+ALL_CPP_OBJ := $(call rwildcard,build-magenta-qemu-x86-64/,*.cpp.o)
+ALL_OBJ := $(ALL_C_OBJ) $(ALL_CPP_OBJ)
+
+target: FORCE
+	llvm-link $(ALL_OBJ) -o all.o
+FORCE:

system/utest/elf-interp/rules.mk

@@ -44,7 +44,8 @@ $(BUILDDIR)/$(LOCAL_DIR)/$(ARCH).S.o: $(LOCAL_DIR)/$(ARCH).S
 
 $(BUILDDIR)/$(LOCAL_DIR)/elf-interp-helper.so: \
     $(BUILDDIR)/$(LOCAL_DIR)/$(ARCH).S.o
-	$(NOECHO)$(LD) -shared $^ -o $@
+	true
+	#$(NOECHO)$(LD) -shared $^ -o $@
 
 USER_MANIFEST_LINES += \
     bin/elf-interp-helper.so=$(BUILDDIR)/$(LOCAL_DIR)/elf-interp-helper.so