添加系统调用实验报告

1、v1.0可编辑可修改、构建基本的实验环境基本实验环境与前提条件Windows7、Word2010、VmwareWorkstation、AdobeReaderReadHatLinux,gcc,vi将Linux内核源代码及配置文件传送给虚拟机上的RedHatLinux系统配置网络时遇到这个问题,rooig'locaUiost:-日肚EdkV.l«wTermlrulGoHlpLtooT&Ioc3LhostrootJservicenetworkrestartShuttuiEdownloopbackintertace:IUhJSettingnetworkpaLramQtQrs：

2、UKBringin-gupluupbdck.luterlacu：OKBEJdiiRjiigupIn虹f&ethiQ:Delyrrnining.IPinfoniatlunfurethO.fdjled;n.ulinkpresent.CtiEcrk匚ablt!?1FWLEDJ口心工口|百hm与t=白口七1#DeterminingIPinformationforeth0failed;nolinkpresent.Checkcable通过查找资料发现是系统的Bug,解决方法如下：至U/etc/sysconfig/network-scripts/ifcfg-eth。在文件最后一行中加入11v1.0可

3、编辑可修改check_link_down()return1;文件，则同另夕卜如果存在/etc/sysconfig/networking/profiles/default/ifcfg-eth0样在其中加入这一段东西即可，然后重启系统。23设置网络为DHCP重新启动就可以，啦，直接上图'irwi修iHiUH.thfl"buH-vdWrirvidtvsrtariiH，最后将内核代码下载到/root目录下、Linux内核编译、配置与调试内核配置与编译、解压内核源代码文件v1.0可编辑可修改33tar-zxf、解压后如下拷贝linux,命名为-rlinux 1-V ；> L J

4、*. b !U1a 4 H_ -k !S-X !M! 3. I -L ro3t(53cnlhoat root t cp rootlaccilhoBt root! anaconda-ks-cfg Lunfi-2.4.18 far MP.txt Jiislall. lug install.13g.svslog linaxrootlocalhosr rootl# mv confi£-2.4.18 for-rlinuxlinux2.4,101inus-2.4.18l.imiJL-2.L8.Ldi.gzLinuxkernelCGditiit.tk)cvwwarelodIs-a.B,z-590Z

5、12.tar.gzvimvare-TDOls-distrib、移动到根目录，替换掉.configMP.txt./linux-2.4.18/.configrooWlocalhostraotj#cdlinux-2-4.18/rooWlocalhostlinux-2.4.18IsatxhDv<uncailunii心u加kernelMakefileREADMEscriptsCOPYINGdriversinitlibmrREPORTING-BUGSCREDITSfsipcr(»tlocalho8tlinux-2.4.181#AINIAINERS11.confignetRules.makg

6、-rw-r一一r-1rootrootrnotelocalhostlinux-2B4.18#13850Ocl1321:45config、进入目录，配置和编译内核模块makeoldconfigv1.0可编辑可修改Kerneldebugging(COKF1GJ)E8UG_KERNEL)Y/n/?Debughighremarvsupport(COMFIG_PEBUG_HIGFMEM)N/y/?!Debugmemoryillacations(COMFIGDEBUG_5LAB)Y/n/?lMemorynappedI/Odebugging(CONFIGJ)EBUG_IOVIRT)N/y/?Magic卯后Rq

7、keyCCONFIG_MAGIC_SYSRQ)Y/n/?Spinlockdebugging(CONF1G_DEBUG_SEINLOCKN/y/7VerboseHUG(Jrepoiting(adds7OKJ(CONFIG_DliBUG_BUGVEREQSE)¥/n/?J*EndufLinuxkernelcunflgurdtlon.4*rCJltftkLhetup-levtilMdkefilefurddJitiotldlCUitriglU'dtlull.*Next,yaumustrunKmakedep*.makedepI « P JlK/fircl"/i；iK

8、fi/nmrfovlt-fraiQ-pointermrch-iGBSbaund3ry=? , iiFErpp.r ,i Tint Man邓rSm up Mui mcrukor pditflibf- - ''i-k prropy.c m壮看江 巾口kEl；4.18/include -wall fno-strict-allaslRi - 而cksu限.5 decietuBer.S iodelMs期1ct-protoypes -wno-trierphs ftiQ-coniTQii -pipe -mpreferred st a c k-C arrh/T3flG/Hb fristdfpm

9、ake2j ; EnterinH dirFctory "/root /1 iinux-2.4.18/archB/lib /r oot /1 iiiu 2,4.18/ ser ipi：® /-D_KERKE1_ -l/root/linu2> HdpppndLeivinr ditory '/re/Iinux-2.4.18/Brch/i3耽/lib leaving directon1 '/root/linux-2.4* 18r/root/ 1 in UK-21, 4.1 a/scripts/rikdp -D_ KFRKEL-T /ron t/1 j tiux

10、- 2.418/i.nc liide -Wh I L-strictpretijtypes1rifiraphs -02 -foqiit-fra«ie-pointer fno-strict-aliasing-fttQ-cooQJi -pipe -wreferred-slack-boundarv=2 -Mrch=ieafi - extble.c fault c init,c ioreuapBc > ,depend inalsel?1: Lpving direrrnry /roDt/liniEXmx.c oltf-checksuTi-c strstTUV a sus . c prorp

11、fis . c ptrace nemeiphare. c setup. r signal . r ismboo 5+c iwe.c trinpollne.s traps -c "l写ks_apf<c wrnse.c > .depend mmkelZl; Leavine dir c*c Tory " /ro t/I iniix - a. 4 - is/irch / i 386 /kern c 1 muke -c arch/i3B6/mr fatdep mflkeI2: Rntpring diTprtory '/r/inux-2.4,18/arch/138A

12、/mflpm工乂曾 up-date wxlverfilcmalkel: Entering diTectofry '/rrsot/liTiiux-Z,4,18*/rwt/linux-Zu 4.1 R/iiiirliid/ Hnux/miartvprsiioni-h updated 印心餐口： IiPvinR directory Vroot/liniBX-2.4.181|rrooiiDlocaho£t IIiiuk-2.4.ispud hu±L; -/H n UKt241ArocVglocaMMEL-ainl J ” nut g ka 匚/host -/&!Do

13、wnloid unri四流C Fr1 8 * 3 J: H AMmake cleanmake bzImage#v1.0可编辑可修改objeopv-0binary-R.note-Rrcomment-Scompressd/bvinliniaxcompresspd/bvmlinux.cuttools/buildbbootsectbsetupcompressed/tviilinux+ouTCURRENT>t>zImageRootdeviceis乩3)Boatsector512bytes.setupisZ52Kbytes.Systemis645kB1:Leavingdir#ctary'

14、;/root/limiK-I.4.18/arch/i386/baot1h'UULlULdlllUb1llnux'2.4.18pIsarchdriversipcMakefileREP0RT1MG-BUGSCOPYINGfskprriplmmRljp<iemakpCREDITSincludelibnetscriptsDocumentationinitlAISTAIMEftSREADMESystem.maprootlocalhostllnux-2.4.IS#vmlinuxIrooteiocaJJuostbootJffIsbboot5ectbbootsect.sb5etupbse

15、tup.scompressedMakefiletoolsbbootsect.0bootsect.sbsetup.oPhzlnagGinstall.ghsetup.svid-eo.sfr00tolacalho£tboot11bzlna,-rw-r一一r1rootroot63034oct4oo：22teLinagefe00tLocalhostbootiffl/lrgt，Unujc*2卧Q+18/ai:di，iMGe/bootKoctQlocalho£tbciotmakemodules内核安装与测试安装内核映像文件cparch/i386/boot/bzImage/boot/55-

16、_m£)f£_dir里>?*Lenrrn40口匕口lif?.4.18；声rp;trrh/i3ftfi/txHJT/yizTriagp/boot/vrlinux-?.4.1SIrnnTloralhnsTrrwiQlocalhjistboot.bchair.blinux-3.4.UIn/bnntihitr<3-2rT.2O-®Srp.IhlQtl&dk*le-illfO-2.4.2C-SrDnfig-?.4.cunfiH-2,4.2卜取叩iniird.?o-s,imgkcrneLhInT+fniir1m骷晔，anoduleinfonoduleinf

17、Q-5snipns2,.d,b3V屏twe-napSvSttuHtldp-2,4.203systeurnap-ind,2Q-65npvmlinux-2,ISvmLinuxBvmLinux-2.4.20-9supvuilinuzvmlinuzsVfflLinUZB>np拷贝和安装Linux系统映射文件，并创建其与系统映射文件之间的符号链接v1.0可编辑可修改#执行命令makemodules_install以安装可动态加载的内核模块roote oral fiost 2.4.19.* Ifb. j .moctult!5.gtneric_STringksrtielmu du 1 es-. dep

18、aoduljefl. parpartmap nodules. ua bnap nodLLLc.pcinip pencilEdu Ltd s. u np b i u bind pLrootioca Lhast 2.4rl&J# pwd/Jlb/nodulM/2.4.1Aphm Manager_LuoL!flli>CdlliGtt 2.4.18_Set .jp and nmrmrprlnfer'inciules.ieeeijyiEi添加启动项的配置利用Vi编辑器，vi查看/所在的位置，为/dev/sda3Used AvailebLe Mounted cm3G1177G4170

19、184 47% /Lfoot®iocaihostFilesystpri/deV/sdalLtuuLfilu匚alihustrootledt/IK-blocks9206944root*v1.0可编辑可修改77重新启动系统，从自己创建的内核启动系统启动后查看内核分另1J用unamer,和dmesg查看v1.0可编辑可修改FieEditV.lewGcHelp(rootPlotaliitjfitrootIffUiurti-r2.4.18rantjlhu&lrudlclnvsgLinuxversion(roojtLocaItiost,1ocaLdominJ(eccversion3.2.

20、?200302?(liedHitLinux3.7.2511*1FtiOctCXJ：21：4<ICffI2013三、Linux系统调用添加与实现在内核增加系统调用结构体structsrz_rusage可声明如下:structsrz_rusagestructtimevalru_utime;/*usertimeused*/structtimevalru_stime;/*systemtimeused*/longru_majflt;/*majorpagefaults*/longru_minflt;/*minorpagefaults*/longru_nswap;/*swaps*/;添加到下的中rru

21、ctsrz_rusagestructtimevalru_utime;stnicrtimevalru_stirne;lung;lonoru_ninfIt;ionpru.nswap;添加的系统调用名称为：intget_process_usage(pid_t,structsrz_rusage*);参考的getrusage和sys_getrusage的代码在下面分析getrusage()和sys_getrusage()的源代码1)数据Z构rusage在头文件中定义。structrusagestructtimevalru_utime;/*usertimeused*/#v1.0可编辑可修改struct t

22、imeval ru_stime;longru_maxrss;longru_ixrss;longru_idrss;longru_isrss;longru_minflt;longru_majflt;longru_nswap;longru_inblock;longru_oublock;longru_msgsnd;longru_msgrcv;longru_nsignals;longru_nvcsw;longru_nivcsw;；2)函数 getrusage()/*/ It would make sense to put struct rusage in the task_struct,* except

23、 that would make the task_struct be *really big*. After* task_struct gets moved into malloc'ed memory, it would* make sense to do this. It will make moving the rest of the information* a lot simpler! (Which we're not doing right now because we're not* measuring them yet).* This is SMP sa

24、fe. Either we are called from sys_getrusage on ourselvessystemtimeused*/*maximumresidentsetsize*/*integralsharedmemorysize*/*integralunshareddatasize*/*integralunsharedstacksize*/*pagereclaims*/*pagefaults*/*swaps*/*blockinputoperations*/*blockoutputoperations*/*messagessent*/*messagesreceived*/*sig

25、nalsreceived*/*voluntarycontextswitches*/的作用是获取系统资源使用情况。/*involuntary"*/99v1.0可编辑可修改* below(weknowwearen'tgoingtoexit/disappearandonlywechangeour* rusagecounters),orwearecalledfromwait4()onaprocesswhichis* eitherstoppedorzombied.Inthezombiedcasethetaskwon'tget* reapedtillshortlyafterthe

26、calltogetrusage(),inbothcasesthe* taskbeingexaminedisinafrozenstatesothecounterswon'tchange.* FIXME!Getthefaultcountsproperly!*/intgetrusage(structtask_struct*p,intwho,structrusage*ru)structrusager;memset(char*)&r,0,sizeof(r);switch(who)caseRUSAGE_SELF:=CT_TO_SECS(p->=CT_TO_USECS(p->=C

27、T_TO_SECS(p->=CT_TO_USECS(p->=p->min_flt;=p->maj_flt;=p->nswap;break;caseRUSAGE_CHILDREN:=CT_TO_SECS(p->=CT_TO_USECS(p->#v1.0可编辑可修改=CT_TO_SECS(p->=CT_TO_USECS(p->=p->cmin_flt;=p->cmaj_flt;=p->cnswap;break;default:=CT_TO_SECS(p->+p->=CT_TO_USECS(p->+p->

28、=CT_TO_SECS(p->+p->=CT_TO_USECS(p->+p->=p->min_flt+p->cmin_flt;=p->maj_flt+p->cmaj_flt;=p->nswap+p->cnswap;break;returncopy_to_user(ru,&r,sizeof(r)-EFAULT:0;3)sys_getrusage()只是调用了内核函数getrusage()，是内核提供给用户的接口。asmlinkagelongsysgetUSage(intwho,structrusage*ru)if(who!=RU

29、SAGE_SELF&&who!=RUSAGE_CHILDREN)return-EINVAL;returngetrusage(current,who,ru);1111v1.0可编辑可修改编写应用程序调用该系统(调用)过程在中添力口函数get_process_usage()和系统调用函数sys_get_process_usage()的代码;目录intget_process_usage(structtask_struct*p,structsrz_rusage*ru)structsrz_rusager;memset(char*)&r,0,sizeof(r);TFSO-一一曷孑J

30、define_NR_-J1.d.J二getxattr二W3229_NR_leExaECr230fgetxatcx232_NR_lisuxaEur232tdefineNR二二二six己二tr233define_NR_fliarxattr23defxne_NR_reiECvexatti:；35*define_NRIrejT.ovexattr236#detuneNRfren.ovexauur237#v1.0可编辑可修改#define._瓯.getxattr229define_NR._lgetatrr230idefine_阪_fgetxatrr231define_-listxatrr232define

31、_NR_liistKattr233考defitiw._瓯_flistxattr234_NR._rmove-xattr235define_-NR,_lremovexattr236define_皿_fremovxattr237define_NK_gei_process_usage238ongSYMBOL_NAME()的清单，该清单用来对sys_call_table口数组进行初始化,该数组包含指向内核中每个系统调用的指针。我们在清单最后添加一行：.longSYMBOL_NAME(sys_get_process_usage)sitingSYMBCL_NAME.(sys_ni_sysoall/*23Cr

32、eserved皿皿淑松I-/63。.longSYMBOL_NAME.(sysni_syscall)/*reservedfor团鼠蹑7631s.longSYHBOL_NAME(sysni.syscall)/xreservec.fdi每32.long3YM5OL_NAME(3工_3工)/*reserved£oxg33.long5YMBOL_NAME(sy3_ni_3y3call>/*zcaerQGfor34.longSYMBOL_NAME(8ys_nx_Byeeall/*23Sreserved堂口发黑驶侬猿曷黑宓:.635,IonaSYMBOL_NAME(sys_nl_vscall

33、J7*reservedfor工X觊。灵兔麻匚工”，36salong5YlaI3CLNAME(sysn±sysca.ll)/*reservedfQrf二之耳二友之及司工*二637388NR_sy3calla-ayB_call_tak;le)/A,1ongSYM30L_NAME|sys_ni_sy-callj.1口Kg.i'L一zy<_r-；_：,=(!)/*225*/.long'1b_L_NAr«u(,：._r.i_=yi.izall)产reservedforseta"：tr餐，.Icing-.xT-：I.-m-(t;_r7_-y-：-：)/*

34、reservedforISPtYJtTT=$lnr-SSYWBOJNAME(qyS_ni_Ey£8：L1)/*forfHArkarir7-Ions口'1'J.-rH!)/*rFSrvclfur卜.户1lr1F*fhlungSYMSOUMMECsysj)i_syscall)/*230w.、rdfurL,Uidt11*/.long5YK30LJ4AMEsys_ni_syscall)/*reservedfOTfgetxattr*/.lar.fi5¥M3Cl_J4AME(sy_jiijyacall)/reservedforlistxdttr*/.LorKSYNBOL

35、_HMtE(bvs_Jii_syscall)/*reservedforlllstxattr*/.1岫咨SYMBOL_NAN_(sys_ni_Syscal1)Areserved±orflistxattr*/JongSYME3L_NAME(Gys_ni,syscal1)产235reservedtorrencv&xattr*ior：gS¥MBOLJ4AM£(syg_n±_gyEcall)/*reiserveciforIreTKZivexJttrInrnA'rMKIrr7U-F3111/*forTr-二旷讣*/.lung匕"I_priM

36、比,-INSERT1313v1.0可编辑可修改编译安装内核以后的启动界面出bvuL=/dwWbduJefiihlt=OCiHeOUt=lD5plashiinage-(hdo3廿l/grub/spl-ash,xprn.gztitleMIL2.4.16-etztcHjt(hdtO90)kern总1/'nllnux-2.4«18-sriiroe口口t=，d&v/xddLmtitleRedHatLinuxz.-l.Ltflabroot(hdO.O)kerne1/iti1inux-2.4.ISrorooT=/dev/sda3titleRdHatLinux(2=4.20-8snp

37、)root(hi43pCi)kernel/vi1inuz-z.a.20-roroot=lABEL=jrhdc=lde-scsiinitrdl/mitrd-2.4.20-esnp.ingtitleRedHat'LiTiux-up(2.4.20-BJroot(hdOa0)keriiel/v11Ifiuz-2_4.20-sroroot-LAHEL=/hde-ide-scsl#262-9Hot;10jmQpmg1flecgWntuipgrub,conf'126wordiprocessorfooilocajho&tHiiK-z.4J.rz/kerndQfoottocahost.h

38、oougnjbOsacOctos723PM四、编写程序调用新的系统调用程序一头文件testsyscallpid_no执行结果v1.0可编辑可修改1515Dmesg查看信息v1.0可编辑可修改#程序二testsyscallpid_nov1.0可编辑可修改£ileyiewJjermlnalgoHelpo&tQlochrfloc-jtestssceetpv_syscall2.crootlocalhostroot#./testsyscall21S05IShangRangZhuSuccessfUsertime:Oseconds:640000msecondsISystem_time:口seconds;200000msecondsMinlostpages:1102Maxlostpage：2148Changepagetines：0rooteiocalhostrootdmesg查看1717v1.0可编辑可修改1818附件:源程序一:第一种实现方法/#include</root/</root/源程序v1.0可编辑可修改/