(The following is a small issue I have posted about embedding assembler programs frequently used in ARM Linux learning)
When I read the Linux development manual (P95) Today, I encountered the following code:
1:
LDR R4, [R2], #4
STR R4, [R1], #4
CMP R1, r3
BNE 1b
From the previous knowledge, we can understand BNE 1. As for BNE 1B, it is really hard to understand it. I found an explanation for it on th
The transplanted target platform is the http://www.cvtech.com.cn teaching lab Board launched by Wuhan chuangwei Company (JX44B0-1B), host platform is installed with Red Hat Linux 9 PC.
The entire porting process is as follows:
1. Obtain uClinux-Dist
Log on to Red hatwith the root, from the tutorial Board attached to the disc beiuclinux-dist-jx44b0.tar.gz (using the uClinux-dist-20040408 release version) Compressed package to/root/directory, crea
Http://www.docin.com/p-92139363.html
LogicProgramDescribes a question in a logical language, and uses a summary method to obtain the answer to the question.You can generalize the logic program into: algorithm = logic + control.The logic part is
1. List the user name of all the users who have been waiting on the system, note: The same user login more than once, only once can be displayed.650) this.width=650, "height=", "src=" http://b264.photo.store.qq.com/psb?/V14ApF1036yr41/ dpcbgawm2u.r3jd1lijpk5z.smv7p7djywf*3s.poey!/b/dagbaaaaaaaabo=dgjcaaaaaaafag0! "width=" 526 "style=" vertical-align:top; "alt=" dagbaaaaaaaabo=dgjcaaaaaaafag0! "/>2 , remove information about the user who last logged on
DNS server is a computerDomain Name System(domain name System or domain name Service), which is an abbreviation for theDomain Name Resolverand theDomain Name Servercomposed of. Domain Name Serveris to save all of the networkHostthe domain name and correspondingIP Addressand has a server that converts the domain name to the IP address feature.1.rpm-qa|grep bind See if the service is installed.650) this.width=650; "alt=" Picture "src=" http://b392.photo.store.qq.com/
VMware NAT Connectivity ExtranetBackground: In the enterprise because often do experiments need to experiment machine on the outside network, oneself is not the administrator, not so many can Sisu network IP, so need to set up virtual machine sharing Internet, a colleague asked me how to operate, set record as follows:Select a local join after installing VMware:650) this.width=650; "height=" 410 "src=" http://a3.qpic.cn/psb?/594581eb-e62e-4426-a878-95
Xen-server for single-point failover High Availability (HA)Create a new resource pool (the pool in this place is the server Xen-server pool)650) this.width=650; "height=" src= "http://a3.qpic.cn/psb?/594581eb-e62e-4426-a878-953c87dd5729/* shhfudflmmuj6cyulqkfinqlzgvpdx5erq0qjlcrke!/b/dgybaaaaaaaaek=1kp=1pt=0bo=igfjaaaaaaadae8! su=0202829665tm=1481868000sce=0-12-12rf=2-9 "width=" 289 "style=" margin:0px;padding:0px; border-width:0px;border-style:none;v
, L, WC, Pos;
Long n = bmp h-> bfsize-bmp h-> offbits; // The total number of pixels.
Color _ * image = new color _ [N]; // Bitmap matrix
Color _ * newimage = new color _ [N]; // The filtered Bitmap matrix.
Fread (image, N * 3, 1, F); // read the Bitmap matrix
// --------- Copy the first line of the original image that is not processed first, because the window cannot be obtained from the first line.
Memcpy (void *) newimage, (void *) image, (bmp I-> width + 1) * 3 );
//--!!
PS: Red font is an important part, look carefullyThe purpose of this experiment: in the work, will inevitably encounter grub damage, now to simulate the grub damage repair process.One, the first stage repair MBR sector fault;1. We use an order to simulate the first 446 bytes of the MBR by overriding the previous method .[[email protected] ~]# dd If=/dev/zero OF=/DEV/SDA bs=446 count=1if= file name: Enter a file name, default to standard input. The source file is specified.of= file name: Output f
NFS, which is a shorthand for the network File system,Network File System。 The network file system is one of the file systems supported by FreeBSD, also known as NFS. NFS allows a system to share directories and files with others on the network. By using NFS, users and programs can access files on the remote system as if they were accessing local files.1.rpm-qa|grep NFS Rpm-qa|grep rpcbindCheck that NFS and Rpcbind software is installed on Linux. If not, install it.650) this.width=650; "alt=" Pi
One of the major problems with moblin development is that moblin is held to be consistent with the Linux version of mainline, including versions of large and small, leading to the failure of some drivers to keep up. Ubutun9.04 uses 2.6.28.x and fc10 uses 2.6.27.x. moblin cannot wait to upgrade the kernel version to 2.6.30, which causes the driver to fail to follow up. For example, provides PSB driver of LPIA, but it cannot be supported in the curre
Non -wind water glass slipperyLimited to my dream longThe subtle manifestation of God in each otherLian Fang Jingxiu Qiao Ying650) this.width=650; "alt=" Picture "src=" http://a4.qpic.cn/psb?/V10lA07s40psy0/ Hkcmphaxrlwqovuhrstyuwlgosiqlbq4d5m11ebm4zi!/b/dbsbaaaaaaaaek=1kp=1pt=0bo=3adjanwa4wafcso! t=5su=2241315745sce=0-12-12rf=2-9 "style=" margin:0px;padding:0px;border-width:0px; border-style:none;vertical-align:top; "/>night Young, people do not slee
LV expansion in Linux systemsServer: 192.168.26.209Expansion Data disk: The original server storage configuration informationDf-h650) this.width=650; "height=" 248 "src=" http://a1.qpic.cn/psb?/594581eb-e62e-4426-a878-953c87dd5729/dhxpoamm111.* hqssvxxskjavoj*bwml1ztlhrawjfa!/b/dmgaaaaaaaaaek=1kp=1pt=0bo=fal5aaaaaaadamo!su= 0222040449tm=1481871600sce=0-12-12rf=2-9 "width=" 531 "style=" margin:0px;padding:0px;border-width : 0px;border-style:none;vertic
grep-a digital search to show the next line of information650) this.width=650; "height=" 290 "src=" http://b176.photo.store.qq.com/psb?/81c1194a-ff39-4e50-b1b1-40057b06260f/ 4vfstywhy8ig7ib7hywauwhpayzyecqfqo*js0neliw!/b/dlaaaaaaaaaabo=eqeiaqaaaaafegg! "width=" 377 "style=" vertical-align:top; "alt=" dlaaaaaaaaaabo=eqeiaqaaaaafegg! "/>-B Displays the last line of information after a digital search650) this.width=650; "height=" 288 "src=" http://b246.p
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