移植sqlite3,并修复一些bug (#323)

* bugfix: 程序加载器映射内存时，计算要映射的大小不正确的问题。

* 修正brk系统调用不符合规范的地方

* bugfix: 修正fat文件系统未能正确的扩展文件大小的bug

* 增加fcntl系统调用

* 移植sqlite3

user/apps/test_sqlite3/Makefile

@@ -0,0 +1,44 @@
+CC=$(DragonOS_GCC)/x86_64-elf-gcc
+LD=ld
+OBJCOPY=objcopy
+SQLITE_FILENAME=sqlite-amalgamation-3420000
+SQLITE3_DIR=$(shell pwd)/$(SQLITE_FILENAME)
+
+RELIBC_OPT=$(DADK_BUILD_CACHE_DIR_RELIBC_0_1_0)
+CFLAGS=-I $(RELIBC_OPT)/include -I $(SQLITE3_DIR) -D__dragonos__ -DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_FLOATING_POINT -DSQLITE_OMIT_LOAD_EXTENSION -DSQLITE_DEBUG
+
+tmp_output_dir=$(ROOT_PATH)/bin/tmp/user
+output_dir=$(DADK_BUILD_CACHE_DIR_TEST_SQLITE3_3_42_0)
+
+LIBC_OBJS:=$(shell find $(RELIBC_OPT)/lib -name "*.o" | sort )
+LIBC_OBJS+=$(RELIBC_OPT)/lib/libc.a
+
+.PHONY: all clean download_sqlite3 __download_sqlite3
+
+
+all: main.o sqlite3.o
+	mkdir -p $(tmp_output_dir)
+	
+	$(LD) -b elf64-x86-64 -z muldefs -o $(tmp_output_dir)/test_sqlite3  $(shell find . -name "*.o") $(LIBC_OBJS)
+
+	$(OBJCOPY) -I elf64-x86-64 -R ".eh_frame" -R ".comment" -O elf64-x86-64 $(tmp_output_dir)/test_sqlite3 $(output_dir)/test_sqlite3.elf
+	mv $(output_dir)/test_sqlite3.elf $(output_dir)/test_sqlite3
+
+main.o: main.c
+	$(CC) $(CFLAGS) -c main.c  -o main.o
+
+sqlite3.o: $(SQLITE3_DIR)/sqlite3.c
+	$(CC) $(CFLAGS) -c $(SQLITE3_DIR)/sqlite3.c -o sqlite3.o
+
+__download_sqlite3:
+	@echo "Download sqlite3 from https://mirrors.ringotek.cn/pub/third_party/sqlite/$(SQLITE_FILENAME).zip"
+	@wget https://mirrors.ringotek.cn/pub/third_party/sqlite/$(SQLITE_FILENAME).zip || (@echo "Download sqlite3 failed" && rm $(SQLITE_FILENAME).zip && exit 1)
+	@unzip -o $(SQLITE_FILENAME).zip || (@echo "Unzip sqlite3 failed" && exit 1)
+	@rm $(SQLITE_FILENAME).zip || (@echo "Remove $(SQLITE_FILENAME).zip failed" && exit 1)
+
+download_sqlite3:
+# 如果文件夹不存在，则下载，否则不下载
+	@test -d $(SQLITE3_DIR) || $(MAKE) __download_sqlite3
+
+clean:
+	rm -f *.o