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/.gitignore

@@ -0,0 +1,2 @@
+sqlite*.zip
+sqlite-*/

user/apps/test_sqlite3/Makefile

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+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

user/apps/test_sqlite3/main.c

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+// This is a test program for sqlite3.
+// We take it from rcore-os/arceos, thanks to @rcore-os community.
+#include <sqlite3.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+
+int callback(void *NotUsed, int argc, char **argv, char **azColName)
+{
+    NotUsed = NULL;
+
+    for (int i = 0; i < argc; ++i) {
+        printf("%s = %s\n", azColName[i], (argv[i] ? argv[i] : "NULL"));
+    }
+
+    printf("\n");
+
+    return 0;
+}
+
+void exec(sqlite3 *db, char *sql)
+{
+    printf("sqlite exec:\n    %s\n", sql);
+    char *errmsg = NULL;
+    int rc = sqlite3_exec(db, sql, NULL, NULL, &errmsg);
+    if (rc != SQLITE_OK) {
+        printf("sqlite exec error: %s\n", errmsg);
+    }
+}
+
+void query(sqlite3 *db, char *sql)
+{
+    printf("sqlite query:\n    %s\n", sql);
+    char *errmsg = NULL;
+    int rc = sqlite3_exec(db, sql, callback, NULL, &errmsg);
+
+    if (rc != SQLITE_OK) {
+        printf("%s\n", errmsg);
+    }
+}
+
+void query_test(sqlite3 *db, const char *args)
+{
+    puts("======== init user table ========");
+    exec(db, "create table user("
+             "id INTEGER PRIMARY KEY AUTOINCREMENT,"
+             "username TEXT,"
+             "password TEXT"
+             ")");
+
+    puts("======== insert user 1, 2, 3 into user table ========");
+
+    char cmd[256] = {0};
+    sprintf(cmd,
+            "insert into user (username, password) VALUES ('%s_1', 'password1'), ('%s_2', "
+            "'password2'), ('%s_3', 'password3')",
+            args, args, args);
+    exec(db, cmd);
+
+    puts("======== select all ========");
+    query(db, "select * from user");
+
+    puts("======== select id = 2 ========");
+    query(db, "select * from user where id = 2");
+}
+
+void memory()
+{
+    sqlite3 *db;
+    printf("sqlite open memory\n");
+    int ret = sqlite3_open(":memory:", &db);
+    printf("sqlite open memory status %d \n", ret);
+
+    query_test(db, "memory");
+}
+
+void file()
+{
+    sqlite3 *db;
+    int ret = sqlite3_open("file.sqlite", &db);
+    printf("sqlite open /file.sqlite status %d \n", ret);
+
+    if (ret != 0) {
+        printf("sqlite open error");
+        return;
+    }
+
+    query_test(db, "file");
+    sqlite3_close(db);
+}
+
+int main()
+{
+    printf("sqlite version: %s\n", sqlite3_libversion());
+
+    memory();
+    file();
+    return 0;
+}