+extern int nds32_get_gdb_fileio_info(struct target *target, struct gdb_fileio_info *fileio_info);
+extern int nds32_gdb_fileio_write_memory(struct nds32 *nds32, uint32_t address,
+ uint32_t size, const uint8_t *buffer);
+extern int nds32_gdb_fileio_end(struct target *target, int retcode, int fileio_errno, bool ctrl_c);