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The unexamined life is not worth living. Life without examination is not worth living. – Socrates 1, Principle overview RT thread is not only an embedded real-time operating system (RTOS), but also an excellent Internet of things operating system. Compared with the bare metal polling scheduling algorithm, its thread (task) scheduling ...

Catalogue of series articles Porting Linux 0.0 GPIO operation from 11 to Hi3518EV200 development board preface By lighting the LED light through basic experiments, you can be familiar with some basic knowledge of the target hardware platform, such as memory address space range, how to configure multiplexing pins, how to operate GPIO, ho ...

UNIX interprocess communication mode catalogue 1. Unnamed Pipes 2. Famous pipeline3. Shared memory4. Message queue5. Signal lamp 1. Unknown pipeline 1.1example: 1.1. 1. Anonymous pipeline is a half duplex communication mode. When both parties need to communicate, two pipelines need to be established, which can only be used for communica ...

A hundred blog series This article is: v66.xx Hongmeng kernel source code analysis (root file system) | file system first attached to / | 51 .c .h .o Relevant articles of the file system are: v62.xx Hongmeng kernel source code analysis (document concept chapter) | why do you say everything is a document | 51 .c .h .ov63.xx Hongmeng ker ...

background For an online server, the monitoring alarm shows that the server load is high, reaching more than 100. Log in to the machine and use the top command to view. The CPU and IO utilization are low. At the same time, it is found that there are many ps and pidof processes in the system, and their process status is D. using the kill co ...

The relationship between a process and its open file If the file management system is the manager and provider of the file, then the process is the user of the file in the file system. That is, the relationship between the file management system and the process is the relationship between the service and the customer. File object When a proce ...

Foreword: I just started the core problem recently, so I'll learn from ctfwiki here. Don't spray... The first step is classic... If the title is not given to vmlinux, it can be extracted through extract vmlinux. See start SH finds that kalsr randomization is enabled, and the base address needs to be leaked. This is very similar to the pwn pro ...

What is a kernel module Kernel module can be simply understood as a program running in kernel space. Like user space applications, it has a fixed pattern. First kernel module Let's start with a standard application HelloWorld.c #include "stdio.h" int main(int argc, char** argv) { printf("Hello World!"); } The above code will not be stra ...