kernel: implement initcalls and a testing system

Makefile

@@ -19,7 +19,7 @@ include arch/$(SOCKS_ARCH)/config.mk
 # Platform-independent kernel source files
 ####################################
 
-KERNEL_SRC_DIRS := init kernel vm ds util obj
+KERNEL_SRC_DIRS := init kernel vm ds util obj test
 KERNEL_C_FILES := $(foreach dir,$(KERNEL_SRC_DIRS),$(wildcard $(dir)/*.c))
 KERNEL_OBJ := $(addprefix $(BUILD_DIR)/,$(KERNEL_C_FILES:.c=.o))
 
@@ -34,10 +34,10 @@ LIBC_OBJ := $(addprefix $(BUILD_DIR)/,$(LIBC_C_FILES:.c=.o))
 BUILD_ID := $(shell tools/generate_build_id.py --arch $(SOCKS_ARCH))
 
 CFLAGS := $(CFLAGS) -DBUILD_ID=\"$(BUILD_ID)\" -g -Wall -Werror -pedantic \
-	-Iinclude -Iarch/$(SOCKS_ARCH)/include -Ilibc/include -Os
+	-Iinclude -Iarch/$(SOCKS_ARCH)/include -Ilibc/include
 
 ASMFLAGS := $(ASMFLAGS) -DBUILD_ID=\"$(BUILD_ID)\"
-LDFLAGS := $(LDFLAGS) -g -Os
+LDFLAGS := $(LDFLAGS) -g
 
 ALL_KERNEL_OBJECT_FILES := $(KERNEL_OBJ) $(ARCH_OBJ) $(LIBC_OBJ)
 ALL_KERNEL_DEPS := $(ALL_KERNEL_OBJECT_FILES:.o=.d)