其中bootloader的case里面有通过write_reboot_bootloader方法调整BCB(bootloader control block),方法源码在/bootable/recovery/bootloader_message/bootloader_message.cpp,这里不贴了感兴趣自己找一下; 通过该方法将command“bootonce-bootloader”更新到BCB中,但最终bootloader并没有用到这个command,所以写这个的原因我现在还...
理论上,所有的Android设备都存在着Fastboot/Bootloader模式,不过,由于Android操作系统的开源特性,各厂商的对 自家的相关Android设备都有着各自不同的Fastboot/Bootlader模式。当然,并非所有的厂商的都会对旗下设备的Fastboot /Bootloader模式进行锁定。然而,大多数情况下,它们的Fastboot/Bootloader模式是锁定的。但是 android r...
android::base::GetBoolProperty("ro.boot.dynamic_partitions",false)) { reboot_target ="bootloader"; }// When rebooting to the bootloader notify the bootloader writing// also the BCB.if(reboot_target =="bootloader") { std::string err;if(!write_reboot_bootloader(&err)) {LOG(ERROR) <<"re...
17 case ANDROID_RB_RESTART2:// arg中存放的是reboot的reason,如bootloader、recovery18 ret = syscall(__NR_reboot, LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, 19 LINUX_REBOOT_CMD_RESTART2, arg); 20 break; 21 22 default: 23 ret = -1; 24 } 25 26 return ret; 27 } 从这里看出它的主要工...
(address_sanitizer)// Load asan.options if it exists since these are not yet in the environment.// Always ensure detect_container_overflow=0 as there are false positives with this check.// Always ensure abort_on_error=1 to ensure we reboot to bootloader for development builds.extern"C"...
Android recovery mode enables you to simply reboot the Android system, apply the latest updates, factory reset the phone, reboot to bootloader, etc. No command in recovery mode usually means thatAndroid won’t boot into recovery or unlock bootloader failed and shows you the error message. That...
do_msm_poweroff()与do_msm_restart()都设置了dload,PMIC,唯一不同的是do_msm_restart()里 多了一个__raw_writel的动作,即reason写入IMEM,目的在于重启进入sbl1时判断应该进入那种模式,如我们开发用的 bootloader模式,恢复出厂设置的recovery模式等。
"struct bootloader_message_ab size changes"); #endif #endif /* __UBOOT__ */ #define BOOT_CTRL_MAGIC 0x42414342 /* Bootloader Control AB */ #define BOOT_CTRL_VERSION 1 struct slot_metadata { // Slot priority with 15 meaning highest priority, 1 lowest // priority and ...
While trying to come up with a solution for this, I attempted to constantly hold down the power and volume down buttons of the phone. This caused the phone to be in a boot-loop: it would restart and load the bootloader for a few seconds, and then restart again. I noticed that dur...
- Android Bootloader support: CONFIG_ANDROID_BOOTLOADER This enables support for the Android bootloader flow. Android devices can boot in normal mode, recovery mode or bootloader mode. The normal mode is the most common boot mode, but recovery mode is often used to perform factory reset and OTA...