In the following text, locking files and directories refers to adding certain attributes to files and directories, such as read-only. chattr +ia 1. Symptoms of Server Breach Recently, a friend’s server (he set up a website himself) seemed to have been breached, with symptoms including: the server’s CPU resources being at 100% for an extended … Read more
1. Registers CM3 has general-purpose registers R0 to R15 and some special function registers. For general-purpose registers R0 to R12, the initial reset values are unpredictable. 2. CM3 has a set of general-purpose registers from R0 to R15. Note: Most 16-bit Thumb instructions can only access R0 to R7, while 32-bit Thumb-2 can access all … Read more
Work Mode Thread mode: This mode is active when the processor is reset or exits from an exception. Code in this mode can be either privileged or user code, controlled by CONTROL[0]. Handler mode: This mode is entered when an exception (including interrupts) occurs, with all code having privileged access. Code Privileges Privileged access: Full … Read more
Click on the “Chao Ge Quote” above to follow us When encountering module exception issues, apart from returning the device, what else can users do? In fact, not all module exception issues require returning the device. For example, module exception 3 can be resolved easily, while sometimes module exception 4 can be resolved without any … Read more