razer drivers linux

Preface Linux is a variant of the UNIX operating system, and the principle and idea of writing a driver in Linux is similar to that of other Unix systems, but it is very different for drivers in DOS or window environments. Design the driver in the Linux environment, the thought is concise, the operation is convenient,

ARM processor.4. Start GDBPath= $PATH:/opt/arm-linux-gcc/s3c2440_4. 4.3/~/buildspacce/linux-2.6. + . 2_debugarm-none-linux-gnueabi-gdb./vmlinux-d.The kernel stops in hibernation when the OPENOCD is connected in gdb.(GDB) Target remote:3333Remote debugging using:3333s3c24xx_default_idle () at Arch/arm/mach-s3c2410/include/mach/system.h : 0(i++) {5. The ke

, void *addr)int test_bit (nr, void * addr);int test_and_set_bit (nr, void *addr);int test_and_clear_bit (nr, void *addr);int test_and_change_bit (nr,void *addr);Spin lockprimarily for SMP and kernel preemption scenariossingle CPU and kernel can be preempted, preemption will be banned during spin lock holdYou cannot call Copy_to_user () Copy_from_user Kmalloc () and other functions that may cause blocking during a spin lock callspinlock_t spin;Spin_lock_init (lock);Spin_lock (lock);Spin_try_lock

No_llseek Access control for device files Exclusive equipment The most blunt method of access control is to allow only one process to open the device at a time Restrict access by only one user at a time Requires two data items An open count UID of the device owner Current->uid Current->euid Block Open alternative to Ebusy This is usually the

*/Unregister_chrdev_region (MKDEV (mem_major, 0), 2); /* Release the device number */}Module_author ("David Xie");Module_license ("GPL");Module_init (Memdev_init);Module_exit (Memdev_exit);(3) app-ioctl.c(application)#include #include #include #include #include "memdev.h"/* contains the command definition */int main (){int fd = 0;int cmd;int arg = 0;Char buf[4096]; /* Open the device file */FD = open ("/dev/memdev0", O_RDWR);if (FD {printf ("Open Dev Mem0 error!\n");return-1;} /* Invo

in the queue, and returns null if none. Do not delete this request after processing struct Sbull_dev *dev = Req->rq_disk->private_data ; if (! blk_fs_request (req)) {//Determine if a file system request is not a block device request PRINTK (kern_notice "Skip non-fs request.\ n "); end_request (req, 0); continue; } The//sbull_transfer () function is a real processing block device request function Sbull_transfer (d EV, Req->sector, req->current_nr_sectors, req->buffer, Rq_data_dir (req)); en

In the fourth chapter of the book "Linux device Drivers", we specialize in the debugging technology in driver development.PRINTK is just one of the techniques that requires PRINTK to print messages and write to files on disk, which slows down the entire code execution speed.There are also debugging techniques, and the effect on Code execution speed is smaller than prink.In this, we can have the driver creat

); Read-copy-update Read-copy-update (RCU) is also an advanced mutex mechanism. Rarely used in drivers Http://www.rdrop.com/users/paulmck/rclock/intro/rclock_intro.html Optimized for situations where reads are frequent and rarely written The protected resource should be accessed through a pointer When the data structure needs to be modified, the write thread replicates first,

1. Linux Power Management Global architectureLinux power management is very complex, involving system-level standby, frequency-voltage transformation, System idle processing, and each device driver support for system standby and runtime power management for each device, which can be say and every device driver in the system.Power management is very important for consumer electronics products. Therefore, this part of the work often occupies a considera

Skb_release_data function has 0xc4 so large, and oops occurs at 0x74 place. So let's take a look at where the Skb_release_data starts:#grep Skb_release_data./system.mapC0282AF4 T Skb_release_dataSo we know that when the system error occurs, the program pointer is c0282af4+0x74=c0282b68(2) Then use GDB to view the GDB./vmlinux (executed under the Linux directory) and enter debug mode.gdb$ b *0xc0282b68Breakpoint 1 at 0xc0282b68:file NET/CORE/SKBUFF.C,

the Linux structure for continued use.Overall analysis-ReconstructionIf your project does not have a tight schedule, and you can use the portability code repeatedly for future projects, you will analyze the current RTOS application structure based on the time, and how to map them to the Linux structure. For RTOS application code, you need to consider ing RTOS tasks one by one to the viability of

Linux Kernel '/drivers/media/media-device.c' Local Information Leakage Vulnerability Release date:Updated on: Affected Systems:Linux kernel 2.6.38-3.15-rc2Description:--------------------------------------------------------------------------------Bugtraq id: 68048CVE (CAN) ID: CVE-2014-1739Linux Kernel is the Kernel of the Linux operating system.Linux kernel 2.6.

Chapter 1 2: An Introduction to device driver building and running modules 1. Concurrent, security -- module writting notes 2. Kernel stack is small, normally one page (4 K). So don't create a lot of local variables and don't have a long call stack. 3. kernel can't handle float pointing computing. 4. Compiling Build: OBJ-M: = module. o Module-objs: = file1.o file2.o Make-C ~ /Kernel-2.6 m = 'pwd' modules 5./proc/modules saves all modules load. lsmod uses this file as well. Entries in/proc/mod

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knowledge involved in the chapter, but this is my idea during the review.I learned about arm-Linux. Except for the first chapter, other code is run on ARM9, the kernel version I used is the 2.6.29 kernel I used during learning. If there is any infringement in the following articles, please contact me immediately and I will delete them immediately. · Linux Device Driver Summary (1): basic concepts related

Release date: 2010-09-09Updated on: 2010-09-30 Affected Systems:Linux kernel 2.6.xUnaffected system:Linux kernel 2.6.36-rc4Description:--------------------------------------------------------------------------------Bugtraq id: 43098Cve id: CVE-2010-3084 Linux Kernel is the Kernel used by the Linux operating system. The niu_get_ethtool_tcam_all () function in the driv