Android 9 调试： EDK fastboot android 9 user 版本 开启fastboot

从如下代码中可以看到，fastboot的命令是由这几个宏打开的，只要在user模式下强制使能这几个宏开关即可

#define ENABLE_UPDATE_PARTITIONS_CMDS
#define ENABLE_DEVICE_CRITICAL_LOCK_UNLOCK_CMDS
#define ENABLE_BOOT_CMD

          struct FastbootCmdDesc cmd_list[] = {
      /* By Default enable list is empty */
      {"", NULL},
/*CAUTION(High): Enabling these commands will allow changing the partitions
 *like system,userdata,cachec etc...
 */
#ifdef ENABLE_UPDATE_PARTITIONS_CMDS
      {"flash:", CmdFlash},
      {"erase:", CmdErase},
      {"set_active", CmdSetActive},
      {"flashing get_unlock_ability", CmdFlashingGetUnlockAbility},
      {"flashing unlock", CmdFlashingUnlock},
      {"flashing lock", CmdFlashingLock},
#endif
/*
 *CAUTION(CRITICAL): Enabling these commands will allow changes to bootimage.
 */
#ifdef ENABLE_DEVICE_CRITICAL_LOCK_UNLOCK_CMDS
      {"flashing unlock_critical", CmdFlashingUnLockCritical},
      {"flashing lock_critical", CmdFlashingLockCritical},
#endif
/*
 *CAUTION(CRITICAL): Enabling this command will allow boot with different
 *bootimage.
 */
#ifdef ENABLE_BOOT_CMD
      {"boot", CmdBoot},
#endif
      {"oem enable-charger-screen", CmdOemEnableChargerScreen},
      {"oem disable-charger-screen", CmdOemDisableChargerScreen},
      {"oem off-mode-charge", CmdOemOffModeCharger},
      {"oem select-display-panel", CmdOemSelectDisplayPanel},
      {"oem device-info", CmdOemDevinfo},
      {"continue", CmdContinue},
      {"reboot", CmdReboot},
      {"reboot-bootloader", CmdRebootBootloader},
      {"getvar:", CmdGetVar},
      {"download:", CmdDownload},
  };