Original address: Linux kernel source Code Analysis--Kernel boot (5) Image kernel boot (rest_init function) (Linux-3.0 ARMv7) TekkamanninjaTransferred from: http://blog.chinaunix.net/uid-25909619-id-4938395.htmlThe previous rough analysis of the Start_kernel function, which basically is the memory management and the da
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Makefile is not make love
I used to spend four years in school and didn't learn anything. Every day, I skip classes, surf the Internet, play games, and go to bed. When I graduated from college, I was told that makefile was comp
Http://blog.sina.com.cn/s/blog_65373f1401019dtz.htmlLinux Kernel Learning notes-5 memory management1. Related Data structuresallocating memory in the kernel tends to be more restrictive than user space, such as the inability to sleep in many cases in the kernel, and the failure to handle memory allocations as easily as
Deep understanding of PHP kernel (5) variables and data types-structure and type of variables, and deep understanding of the kernel
Link: http://www.orlion.ga/238/
Programming Language types can be divided into strong type and weak type. PHP is a weak type language, but C is a strong type language. Internally implemented in PHP on the official website, all variab
Linux kernel design and implementation reading notes (5)-Interrupt and interrupt handlers
1, interrupt is an electrical signal, generated by hardware devices, and directly into the interrupt controller input pin. The interrupt controller then sends the corresponding signal to the processor. Once the processor detects t
we went to install Hello.ko, there was this error: undefined symbol:This is because of the extern int function () in our program, which is not present in the system. Does that have to Insmod Function.ko first!?Although the system has already appeared function functions, but the system still cannot find. You can see that the error is still there.This is the problem with module export: When we are going to use a variable inside a module, the function must be exported using a symbol. That is, the
indicates the path (kernel path) to be followed by-C to compile the module, and M indicates the path to the module file4. Finally write clean pseudo-directives to clear the resulting intermediate and. ko files. Copy the Ko file to the file system.5.rmmod should have the same directory name as the kernel version of the kernel
"Linux kernel design and implementation" Chapter 5 reading notesIn modern operating systems, the kernel provides a set of interfaces that user processes interact with the kernel, which are:
Restrict application access to hardware devices
Provides a mechanism for creating new processes to communicate with e
\text{|} \vec{0},k_n) $;(2) Likelihood $p (\vec{t}_n\text{|} \vec{y}_n) =gauss (\vec{t}_n\text{|} \vec{y}_n,\beta^{-1}i_n) $.Then, we have $p (\vec{t}_n) =\int p (\vec{t}_n\text{|} \vec{y}_n) \cdot P (\vec{y}_n) \cdot D\vec{y}_n=gauss (\vec{t}_n\text{|}\vec{0},k_n+\beta^{-1}i_n) $. Here, $p (\vec{t}_n) $ are the likelihood of hyperparameter $\vec{\theta}$, and we can make a MLE to learn $\vec{\theta}$.Also, $p (\vec{t}_{n+1}) =gauss (\vec{t}_{n+1}\text{|}\VEC{0},K_{N+1}+\BETA^{-1}I_{N+1}) $. Hen
Linux Kernel programming (replace printk) 5-Linux general technology-Linux programming and kernel information. The following is a detailed description. 9. Replace printk's
At the beginning (Chapter 1), we said that X is not mixed with kernel module programming. This is correct when developing the
In-depth understanding of the internal structure of PHP kernel (5) functions php functions include user-defined functions and internal functions (print_rcount ...), anonymous function, variable function ($ funcprint_r; $ func (array (a, B ));) in the PHP kernel source code, functions are divided into the following types: # defineZEND_INTERNAL_FUNCTION1 # defi dee
;178 Schedule ();If the waiting queue has a wait task, and the queue header pointer points to a task other than the current task, the wait task is set toThe ready state to run and re-execute the scheduler. When the pointer *p is not pointing to the current task, the current task is placedAfter entering the queue, new tasks are inserted into the wait queue, so since this task is interruptible, you should first perform allOther waiting tasks.179 if (*p *p! = current) {More e-book tutorials downlo
The original kernel is 24, ready to be upgraded to 32
Intended for useMcuelenaere smartq http://gitorious.org/mcuelenaere-smartq-kernel
Git clone git: // gitorious.org/mcuelenaere-smartq-kernel/mcuelenaere-smartq-kernel.git,
Many problems are found, and the. config file cannot be found.
ARCH/ARM/mach-s3c6410/built-in.o: In function 'smartq _ machine_i
Linux kernel source code learning (5) swap in/out of Memory Page
--- Flyli
The main purpose of physical Page Swap-in and swap-out is to swap infrequently used memory pages to the hard disk when the physical memory is insufficient to ensure normal operation of the program.
In computer theory, time resources and space resources are a pair of conflicting topics. We often see time-for-space or space-for-time
Reading Notes on Linux kernel design and implementation (5)-main content of system calling: What is the implementation principle of system calling on Linux? a simple implementation of system Calling 1. what is a system call www.2cto.com? in simple terms, a system call is between a user program and a hardware device...
Reading Notes on Linux kernel design and impl
Reading Notes on Linux kernel design and implementation (5)-Main content of system calling: What is the implementation principle of system calling on Linux? A simple implementation of system calling 1. in simple terms, system calls are a bridge between user programs and hardware devices. The user program calls the hardware device as needed. The existence of system calls has the following important meanings:
Ucos ii kernel 2: clock beat
In ucos ii, clock beats are as important as human hearts ,. It plays a vital role in the smooth switch between tasks of the CPU.
Ucos ii requires the user to provide the clock source. In the muc21 project, I used the timer 0 as the clock source. Note the following when using the clock source:RequiredStart a multi-task SystemLaterEnable the timer.,That is, after osstart () is called.
The clock cycle service in ucos ii is im
Conntrack kernel Reading Notes in netfilter (5)6. Principle of TCP filter:
When the filter receives the first packet of a connection, it creates a table item for the connection in the global connection table, create original tuple and reply tuple with the source, destination IP, and port tuples carried in the message. The two tuple are different from each other to identify the connection. Subsequent packets
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