系统调用文档/sys_mount-函数介绍.md

+```c
+int sys_mount()
+{
+    // 1. 读取引导分区数据
+    uint32_t N = fat32_read_N();
+    struct fat_boot_sector *boot_sector_data = fat32_read_boot_sector(N);
+    if (boot_sector_data == NULL)
+    {
+        // 处理错误
+        fprintf(stderr, "Failed to read boot sector.\n");
+        return -1;
+    }
+
+    // 2. 从引导分区读取数据到 BPB
+    struct fat_bios_param_block *bpb = fat32_read_bpb(boot_sector_data);
+    if (bpb == NULL)
+    {
+        // 处理错误
+        fprintf(stderr, "Failed to read BPB.\n");
+        free(boot_sector_data);
+        return -1;
+    }
+
+    // 3. 将 FAT 读入内存
+    uint32_t *fat = fat32_read_fat(bpb, file_allocation_table);
+    if (fat == NULL)
+    {
+        // 处理错误
+        fprintf(stderr, "Failed to read FAT.\n");
+        free(boot_sector_data);
+        free(bpb);
+        return -1;
+    }
+
+    // 4. 将根目录读入内存
+    fat32_read_root_dir(fat, bpb);
+
+    // 清理分配的内存
+    free(boot_sector_data);
+    free(bpb);
+    free(fat);
+
+    return 0;
+}
+```
\ No newline at end of file