OllyDbg Plugin API v1 - documentation.help · OllyDbg now supports "always on top" option...

OllyDbgPluginAPIv1.10

LicenseAgreement(veryofficial)

Generalprinciples-readitfirst!

Compilation-readitsecond!

AlphabeticallistofallPluginAPIelements

Informationfunctions

Dataformattingfunctions

Datainputfunctions

Dataconversionfunctions

Sorteddatafunctions

Namefunctions

Searchfunctions

Disassemblyfunctions

Assemblyfunctions

Procedurefunctions

Watchandexpressionfunctions

Breakpointfunctions

Executionandsteppingfunctions

Traceandprofilingfunctions

CPU-specificfunctions

Sourcecodesupportfunctions

Windowfunctions

Threadfunctions

Memoryfunctions

Modulefunctions

Pluginfunctions

Plugincallbackfunctions

Structures

Functionprototypes

Custommessages

Sampleprogram

AllbrandnamesandproductnamesusedinOllyDbg,accompanyingfilesorinthishelparetrademarks,registeredtrademarks,ortradenamesoftheirrespectiveholders.

Registration

OllyDbg1.10isCopyright(C)2000-2004OlehYuschuk.Tousethisprogramonapermanentbasisorforcommercialpurposes,youshouldregisterit.Theregistrationisfreeofchargeandassumesnofinancialorotherobligationsfromyourside-justbefairandletmeknowthatyoulikethissoftware.Anypersonaldataintheregistrationformisoptional(useyournicknameorpseudonymifyouwant).

IfyouuseOllyDbgtogetherwithRandallHyde'sHLA(HighLevelAssembly),youdon'tneed(butstillallowed)toregister.

Whenregistering,youcansubscribeforinformation(email)onthenewreleaseversionsofthisprogram.Inthiscaseyouagreenottotreatthisinformationasaspamaslongasnumberoflettersdoesnotexceed4eachcalendaryearandtheycontainnoadvertisementsfromthethirdparties.Ifyounolongerwanttoreceivethisinformation-well,justletmeknow,andIwillimmediatelydeleteyouraddressfrommydatabase.

IfyouarealreadyaregisteredOllyDbguser,youdon'tneedtore-registerthisversion.Ifyouarenew,pleasereadlicenseargeement,filltheregistartionform(register.txt)orcopyandfillthefollowingsectionfromthehelpandemailittoOllydbg@t-online.de.Iwillkeepyourinformationconfidentialandwillnotgiveittothirdpersons,unlessforcedbyalaw.

RegistrationformforOllyDbgv1.10

TouseOllyDbg,youmustagreewithallofthetermsand

conditionsoftheaccompanyingLicenseAgreement.Allother

answersareoptional.

Name___________________________________________________

Title___________________________________________________

Company___________________________________________________

City,state___________________________________________________

Country___________________________________________________

WheredidyoufindOllyDbg__________________________________

___________________________________________________

Areyougoingtowriteyourownplugins

(____)Yes(____)No(____)Don'tknow

Iagreewithallthetermsandconditionoftheaccompanying

LicenseAgreement(Veryimportant!Pleasemark!)

(____)Yes(____)No

Dateofregistration________________________________________

IfyouwanttoreceivenotificationswhenOllyDbg2.00and

subsequentversionswillbeready,pleaseenteryouremail

addresshere:

_____________________________________________________________

Thankyou.IfyouhaveideashowtoimproveOllyDbgandmake

iteasierinuse,orwanttohavesomenewfeatures,please

letmeknow.Youropinionhelpsmealot!

Yourfirstidea:____________________________________________

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Yoursecondidea:___________________________________________

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Yourthirdidea:____________________________________________

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LicenseAgreement

Trademarkinformation

AllbrandnamesandproductnamesusedinOllyDbg,accompanyingfilesorinthishelparetrademarks,registeredtrademarks,ortradenamesoftheirrespectiveholders.Theyareusedforidentificationpurposesonly.

LicenseAgreement

ThisLicenseAgreement("Agreement")accompaniestheOllyDbgversion1.10,OllyDbgPluginDevelopmentKitversion1.10andrelatedfiles("Software").ByusingtheSoftware,youagreetobeboundbyallofthetermsandconditionsoftheAgreement.

TheSoftwareisdistributed"asis",withoutwarrantyofanykind,expressedorimplied,including,butnotlimitedtowarrantyoffitnessforanyparticularpurpose.InnoeventwilltheAuthorbeliabletoyouforanyspecial,incidental,indirect,consequentialoranyotherdamagescausedbytheuse,misuse,ortheinabilitytouseoftheSoftware,includinganylostprofitsorlostsavings,evenifAuthorhasbeenadvisedofthepossibilityofsuchdamages.

TheSoftwareisownedbyOlehYuschuk("Author")andisCopyright(c)2000-2004OlehYuschuk.TousethisSoftwareonapermanentbasisorforcommercialpurposes,youmustregisteritbyfillingthesuppliedregistrationformandsendingittotheAuthor.Youdon'tneedtoregisterSoftwareifyouuseitexclusivelywithRandallHyde'sHighLevelAssembly.IfyouarealreadyaregisteredOllyDbguser,youdon'tneedtore-registertheSoftwareagain.IftheSoftwareisregisteredtoacompanyororganization,anypersonwithinthecompanyororganizationhastherighttouseitatwork.YoumayinstalltheregisteredSoftwareonanynumberofstoragedevices,likeharddisks,floppydisksetc.andareallowedtomakeanynumberofbackupcopiesofthisSoftware.

Youarenotallowedtomodify,decompile,disassembleorreverseengineertheSoftwareexceptandonlytotheextentthatsuchactivityisexpresslypermittedbyapplicablelaw.YouarenotallowedtodistributeoruseanypartsoftheSoftwareseparately.YoumaymakeanddistributecopiesofthisSoftwareprovidedthata)thecopycontainsallfilesfromtheoriginaldistributionand

thesefilesremainunchanged;b)ifyoudistributeanyotherfiles(forexample,plugins)togetherwiththeSoftware,theymustbeclearlymarkedassuchandtheconditionsoftheirusecannotbemorerestrictivethanconditionsofthisAgreement;andc)youcollectnofee(exceptfortransportmedia,likeCDordiskette),evenifyourdistributioncontainsadditionalfiles.

Youareallowedtodevelopanddistributeyourownplugins--DynamicLinkLibrariesthatconnecttotheSoftwareandmakeuseofthefunctionsimplementedintheSoftware--freeofchargeprovidedthata)yourpluginscontainnofeaturesthatpersuadeorforceusertoregisterthem,orlimitfunctionalityofunregisteredplugins;b)youallowfreedistributionofyourpluginsontheconditionssimilartothatoftheSoftware;andc)youcollectnofee(exceptfortransportmedia,likeCDordiskette).Ifyouwanttodevelopcommercialplugin,pleasecontactAuthorforaspecialAgreement.

ThedistributionincludesfilesPSAPI.DLLandDBGHELP.DLLthataretheMicrosoft(R)Redistributablefiles.ThesefilesshouldbeinstalledonlyinthedirectorywheretheSoftwareresides.YoushouldusesuppliedPSAPI.DLLonlyonWindowsNT(R)4.0.YouarenotallowedtodistributePSAPI.DLLand/orDBGHELP.DLLseparatelyfromtheSoftware.

ThisAgreementcoversonlytheactualversion1.10oftheOllyDbgandversion1.10oftheOllyDbgPluginDevelopmentKit.AllotherversionsarecoveredbyseparateLicenseAgreements.

Fairuse

Manysoftwaremanufacturersexplicitlydisallowyouanyattemptsofdisassembling,decompilation,reverseengineeringormodificationoftheirprograms.Thisrestrictionalsocoversallthird-partydynamic-linklibrariesyourapplicationmayuse,includingsystemlibraries.Ifyouhaveanydoubts,contacttheownerofcopyright.Thesocalled„fairuse"clausecanbemisleading.Youmaywanttodiscusswhetheritappliesinyourcasewithcompetentlawyer.Pleasedon'tuseOllyDbgforillegalpurposes!

Generalprinciples

Welcome.OllyDbgv1.10isthefinalversion.Idecidedtostopitsdevelopment.ThisdoesnotmeanthatOllyDbgisdead-currentlyI'mpreparingv2.0-butnewversionwillbeincompatiblewithv1.xx,atleastwhatconcernsplugins.Sorry,butthisistheonlypossiblesolution.

ThisdocumentsdescribesOllyDbgPluginAPIv1.10.Therearenosignificantchangesininterfacesorinstructures,sopluginscompiledforOllyDbg1.06or1.08willusuallyworkwithOllyDbg1.10.Theonlychangesthatmaybenot100%backward-compatiblearelimitedto:

-Structurest_regandt_bpointareextended;

-Newoption"Alwaysontop"requiresspecialsupportfrompluginwindows;

-FunctionBrowsefilenamesupportsSaveFiledialog;

PluginisaDLLthatresidesinOllyDbgdirectoryandaddsfunctionalitytoOllyDbg.Youarefreetowriteanddistributeyourownplugins,providedthattheyarefree,too.(SeeLicenseAgreementfordetails).Onyourrequest,Iamreadytoplacesuchpluginsfordownloadonmyhomepage.Commercialpluginsarealsoallowed,butinthiscaseyouneedspeciallicense.

Toco-operate,differentpluginsrequireuniquenames,.uddtags,nametypesandsoon.Ifyouneedsomeoftheseresources,pleasecontactme.Thisserviceisabsolutelyfreeforyou!

Duringstartup,OllyDbgloadsallavailableDLLsonebyoneandlooksforentrypointsnamed_ODBG_Plugindataand_ODBG_Plugininit.Iftheseentriesarepresentandpluginreportscompatibleinterfaceversion,OllyDbgregisterspluginandaddsentryorsubmenutoPluginspopupinthemainOllyDbgmenu.

PluginscanaddmenuitemstoDisassembler,Dump,Stack,Registers,Memory,Modules,Threads,Breakpoints,Watches,References,WindowsandRuntracewindows.Theycaninterceptbothglobalshortcutsandshortcutsfromoneofthelistedwindows.TheyalsocancreateownMDIwindows.Pluginscanwriteplugin-specificdatato.uddfileswithmodule-dependentinformationandollydbg.iniandaccessdifferentdatastructuresthatdescribedebugged

application.Thereareseveral(ingeneral,optional)callbackfunctionsthatalloweasybutcloseinteractionwithOllyDbg.Additionally,pluginsmaycallmorethan170pluginAPIfunctions.

Plugininterfaceisnotobject-oriented.Perharpsthiswillcomeassurprisetoyou,butallmyexperiencetellsmethatOOPisnotasgoodasmainsoftwarevendorstrytosell.Itisreallygoodifyouwritesmallapplicationperformingstandardfunctions.Forabigweirdproject(andOllyDbgisabigweirdproject)OOPgivesnorealimprovementsindevelopmenttime,errorsincomponentsareveryhardtolocateandevenhardertocorrect.And-contrarytowhatvendorstellus-OOprogramsareusuallyslow.Stopcrying,thisisonlymyopinion,albeitprovedbyallmyexperienceinthelast15yearsorso.Anyway,trytoswallowthatyouwillgetnoready-to-useobjectshereandaredoomedtofreememorybyyourselfwhenpluginterminates.

PluginAPIisnotre-entrantanddoesnotimplementcriticalsections.Ifyourplugincreatesnewthread,don'tcallAPIfunctionsfromthisthread,otherwiseyourisktocorruptinternaldatastructuresandcrashbothprogramandOllyDbg!

SomeexportedAPIfunctionsarenotdescribedhere.TheirdirectusemaybringOllyDbginunstablestate.Ihaveaddedthemforbettercompatibilitywithfutureversionsofplugininterface.

Seealso:Compilation

Alwaysontop

OllyDbgnowsupports"alwaysontop"optionforitsMDIwinsows(calledfromtheAppearancemenu).ThisoptionmeansthatselectedMDIwindowremainsvisibleonthetopofotherwindows.

Addingthisusefuloptiontoapluginisamatterofminutes.PluginscreateMDIwindowsbycallingNewtablewindoworQuicktablewindow.Inthestructuret_table,passedasafirstparameter,youmustspecifyflagTABLE_ONTOP,asinthesampleprogram.Tosupportthisoption,pluginmustpassmessageWM_WINDOWPOSCHANGEDtodefaultpluginfunction(seehere).

That'sall!Easy,isn'tit?

Compilation

Tocompileyourownplugin,youneedsomeCorC++compiler(togetherwithlinkerandrun-timelibraries).Plugininterface(fileplugin.h)iscompatibleatleastwithfollowingcompilers:

·Borland'sC++5.5-commandlinecompiler,availableforfreefromwww.borland.com(requiresregistration);

·Borland'sC++Builder5-basedonthesameC++5.5;

·Microsoft'sVisualC++5.0-ratheroldbutsolidandstable.

Ihaven'ttriedanyothercompilers.Pleaseletmeknowifyoufindanyincompatibilitiesand,ifpossible,sendmecorrectedversionoffileplugin.h.

PluginDevelopmentKitincludessourcecodefortwofullyfunctionalsampleplugins:bookmark,thatallowstosetupto10bookmarksindebuggedapplication,andcommandline,thatimplementscommandlineinterface.Pluginsarewelldocumented.Youcanusethemasatemplateforyourownplugins.Theyarefreeware,i.e.yourrightstomodifyandre-usetheirsourcecodearenotlimitedinanyway.

FollowingcompilersettingsarerequiredforcorrectcommunicationbetweenpluginandOllyDbg.Forcompilerslistedabove,plugin.hforcesorcheckssomeoftheserules:

·Exportallcallbackfunctionsbyname,NOTbyordinal;

·IfyouuseC++compiler,disablenamemanglingonallcallbackfunctions(declarethemasextern"C");

·ForcestandardC-stylepassingofparameterstoallAPIandcallbackfunctions(declarethemascdecl);

·ForceBYTEalignmentofallstructuresdeclaredinplugin.h;

·SetdefaultcharactertypetoUNSIGNED.

KeepinmindthatallpointersyougetfromOllyDbgmaybeNULL.Thisisaverycommonerrortoassumeopposite.

Usestaticrun-timelibrarieslinkeddirectlyintoyourplugin,otherwisedifferencesbetweenversionsofrun-timeDLLswillmakeOllyDbgunstable.DonotsplityourpluginunnecessarilyintoseveralDLLs.Ifyouneeddatafilesthatarenotmodifiablebyuser,trytoplacethisdatadirectlyintoyourpluginasaresource.

TolinkyourplugintoOllyDbg,youalsoneedimportlibraryollydbg.lib.Somecompilers(Borland)includeutilitycalledimplibthatscansexecutablefile(inourcase,ollydbg.exe)andproducesaspecialkindoflibrarywithalistofallexportedfunctions.Someotherproducts,likeMSVC,cangenerateimportlibraryfromthedefinitionfile(ollydbg.def).Similarproductsfromothervendorsarealsoavailable.Fordetails,pleaseconsultdocumentation.

And,lastbutnotleast,don'twasteresources!Don'texportunusedcallbackfunctionsandmakeyourprogramfast!OllyDbgincurrentversionsupportsupto32plugins.Ifeachofthemwilltakeonly50mstorejectaglobalshortcut,then50msforwindow-specificshortcut...youDOunderstandwhatImean,don'tyou?

Contentsofplug110.zip

Pluginkitarchivecontainsfollowingfiles:

Rootdirectory:

bookmark.c-sourceofbookmarkplugin

cmdexec.c-sourceofcommandlineplugin

command.c-sourceofcommandlineplugin

cmdline.rtf-RTFsourceofhelp(.hlp)fileforcommandlineplugin

ollydbg.def-OllyDbgdefinitionfile,somecompilersneedittoproduceimportlibraryollydbg.lib

plugin.h-headerwithdefinitionsofplugininterface

plugins.hlp-thishelpfile

DirectoryBC55:

sample.bpr-projectfileforBCB5,producessample.dll(sameasbookmark.dll)

sample.cpp-mainfileforsample.bpr

bookmark.mak-makefileforBC5.5,producesbookmark.dll

cmdline.bpr-projectfileforBCB5,producescmdline.dll

cmdline.cpp-mainfileforcmdline.bpr

cmdline.mak-makefileforBC5.5,producescmdline.dll

ollydbg.lib-OllyDbgimportlibraryinOMFformat

DirectoryVC50:

bookmark.dsp-projectfileforVisualStudio97,producesbookmark.dll

bookmark.dsw-projectfileforVisualStudio97,producesbookmark.dll

bookmark.mak-makefileforVC5.0,producesbookmark.dll

cmdline.dsp-projectfileforVisualStudio97,producescmdline.dll

cmdline.dsw-projectfileforVisualStudio97,producescmdline.dll

cmdline.mak-makefileforVC5.0,producescmdline.dll

ollydbg.lib-OllyDbgimportlibraryinCOFFformat

MakingsamplepluginswithBC5.5

TobuildsampleDLLswithBC5.5,pleasedothefollowing:

1.Copyfilesbookmark.c,cmdexec.c,command.c,plugin.h,bc55\bookmark.mak,bc55\cmdline.mak,bc55\ollydbg.libtosamedirectory;

2.AssumingthatyourBC5.5compilerisinstalledtoc:\bc55,issuefollowingcommands:

c:\bc55\bin\make-fbookmark.mak

c:\bc55\bin\make-fcmdline.mak

3.Supposethatyouwriteyourownplugin,myplug,consistingofsourcefilesa.c,b.candresourcec.rc.Allyouneedistorenamebookmark.maktomyplug.makandmodifythreelinesnearthetopofthefileinafollowingway:

PROJECT=myplug.dll

OBJFILES=a.objb.obj

RESFILES=c.rc

andthencommand

c:\bc55\bin\make-fmyplug.mak

MakingsamplepluginswithBCB5

BCBprojectsmustcontainmainC++programwiththesamenameasprojectandextention.cpp.Forthisreason,bookmarkplugincreatedwithBuilderiscalledsample.dll.Ofcourse,thishasnoinfluenceonitsfunctionality.

Tobuildsample.dll,pleasedothefollowing:

1.Copyfilesbookmark.c,plugin.h,bc55\sample.bpr,bc55\sample.cppandbc55\ollydbg.libtothesamedirectory;

2.Opensample.bprinBuilderandmakeproject.

Tobuildcmdline.dll,pleasedothefollowing:

1.Copyfilescmdexec.c,command.c,plugin.h,bc55\cmdline.bpr,bc55\cmdline.cppandbc55\ollydbg.libtothesamedirectory;

2.Opencmdline.bprinBuilderandmakeproject.

MakingsamplepluginswithVC5.0fromthecommandline

TobuildsampleDLLswithVC5.0,pleasedothefollowing:

1.Copyfilesbookmark.c,cmdexec.c,command.c,plugin.h,vc50\bookmark.mak,vc50\cmdline.makandvc50\ollydbg.libtothesamedirectory;

2.In.makfiles,editlines

INCLUDE=c:\vc\include

LIBPATH=c:\vc\lib

sothattheypointtoyourincludeandlibrarydirectories;

3.AssumingthatyourVCcompiler,cl.exe,andmakeutility,nmake.exe,resideinc:\vc\bin,executefollowingcommands:

c:\vc\bin\nmake-fbookmark.mak

c:\vc\bin\nmake-fcmdline.mak

MakingsamplepluginsfromtheVisualStudio

Tobuildbookmark.dll:

1.Copyfilesbookmark.c,plugin.h,vc50\bookmark.dsp,vc50\bookmark.dswandvc50\ollydbg.libtothesamedirectory;

2.OpenprojectbookmarkinVisualStudioandmakeit.

Tobuildcmdline.dll:

1.Copyfilescmdexec.c,command.c,plugin.h,vc50\cmdline.dsp,vc50\cmdline.dswandvc50\ollydbg.libtothesamedirectory;

2.OpenprojectcmdlineinVisualStudioandmakeit.

PluginAPI-alphabeticallist

APIfunctions

ThislistcontainsallfunctionsexportedbyOllyDbg.Someofthemarereservedforthefutureuseandarenotdescribedhere.DirectcallstosomeundescribedfunctionsmayimpairOllyDbg'sstability.Ifyouneedsomeundescribedfunction,pleasecontactOlehYuschuk.Functionsthatwereaddedorchangedsinceversion1.08aremarkedwithanasterisk(*).

Addsorteddata

Addtolist

Analysecode

Animate

Assemble

Attachtoactiveprocess*

Broadcast

Browsefilename*

Checkcondition

Compress

Createdumpwindow

Createlistwindow

Createpatchwindow*

Createprofilewindow

Creatertracewindow

Createsorteddata

Createthreadwindow

Createwatchwindow

Createwinwindow

Decodeaddress

Decodeascii

Decodecharacter

Decodefullvarname

Decodeknownargument

Decodename

Decoderange

Decoderelativeoffset

Decodethreadname

Decodeunicode

Decompress

Defaultbar

Deletebreakpoints

Deletehardwarebreakbyaddr

Deletehardwarebreakpoint

Deletenamerange

Deletenonconfirmedsorteddata

Deleteruntrace

Deletesorteddata

Deletesorteddatarange

Deletewatch

Demanglename

Destroysorteddata

Disasm

Disassembleback

Disassembleforward

Discardquicknames

Dumpbackup

Expression

Findallcommands

Findalldllcalls

Findallsequences

Finddecode

Findfileoffset

Findfixup

Findhittrace

Findimportbyname

Findknownfunction

Findlabel

Findlabelbyname

Findmemory

Findmodule

Findname

Findnextname

Findnextproc

Findnextruntraceip

Findprevproc

Findprevruntraceip

Findprocbegin

Findprocend

Findreferences

Findsorteddata

Findsorteddataindex

Findsorteddatarange

Findstrings

Findsymbolicname

Findthread

Findunknownfunction

Followcall

Get3dnow

Get3dnowxy

Getaddressfromline

Getasmfindmodel

Getasmfindmodelxy

Getbprelname

Getbreakpointtype

Getbreakpointtypecount*

Getcputhreadid

Getdisassemblerrange

Getfloat

Getfloatxy

Getfloat10

Getfloat10xy

Gethexstring

Gethexstringxy

Getline

Getlinexy

Getlinefromaddress

Getlong

Getlongxy

Getmmx

Getmmxxy

Getnextbreakpoint

Getoriginaldatasize

Getproclimits

Getregxy

Getresourcestring

Getruntraceregisters

Getruntraceprofile

Getsortedbyselection

Getsourcefilelimits

Getstatus

Gettableselectionxy

Gettext

Gettextxy

Getwatch

Guardmemory

Hardbreakpoints

Havecopyofmemory

Infoline

Injectcode

Insertname

Insertwatch

Isfilling

Isprefix

Isretaddr

Issuspicious

IstextA

IstextW

Listmemory*

Manualbreakpoint

Mergequicknames

Message

Modifyhittrace

Newtablewindow

OpenEXEfile

Painttable

Plugingetvalue

Pluginreadintfromini

Pluginreadstringfromini

Pluginsaverecord

Pluginwriteinttoini

Pluginwritestringtoini

Print3dnow

Printfloat10

Printfloat4

Printfloat8

Printsse

Progress

Quickinsertname

Quicktablewindow

Readcommand

Readmemory

Redrawdisassembler

Registerpluginclass

Restoreallthreads

Runsinglethread

Runtracesize

Scrollruntracewindow

Selectandscroll

Sendshortcut

Setbreakpoint*

Setbreakpointext*

Setcpu

Setdisasm

Setdumptype

Sethardwarebreakpoint

Setmembreakpoint

Settracecondition

Settracecount*

Showsourcefromaddress

Sortsorteddata

Startruntrace

Stringtotext

Suspendprocess

Tablefunction

Tempbreakpoint

Unregisterpluginclass

Updatelist

Walkreference

Walkreferenceex

Writememory

Callbackfunctions

ODBG_Paused*

ODBG_Pausedex*

ODBG_Pluginaction

ODBG_Pluginclose

ODBG_Plugincmd*

ODBG_Plugindata

ODBG_Plugindestroy

ODBG_Plugininit

ODBG_Pluginmainloop

ODBG_Pluginmenu

ODBG_Pluginreset

ODBG_Pluginsaveudd

ODBG_Pluginshortcut

ODBG_Pluginuddrecord

Structures

t_asmmodel

t_bpoint*

t_disasm

t_dump

t_extmodel

t_hexstr

t_memory

t_module

t_operand

t_reg*

t_result

t_sorted

t_sortheader

t_table

t_thread

t_window

Functionprototypes

SORTFUNC

DESTFUNC

DRAWFUNC

Custommessages

WM_USER_BAR

WM_USER_CHALL

WM_USER_CHGS

WM_USER_CHMEM

WM_USER_CHREG

WM_USER_CNTS

WM_USER_DBLCLK

WM_USER_MENU

WM_USER_SCR

WM_USER_STS

WM_USER_VABS

WM_USER_VBYTE

WM_USER_VREL

Informationfunctions

Thisgroupoffunctionsdisplayserrorandinformationmessages,addsmessagestologwindow,showsscrollbarandflash:

voidAddtolist(longaddr,inthighlight,char*format,...);

voidUpdatelist(void);

HWNDCreatelistwindow(void);

voidError(char*format,...);

voidMessage(ulongaddr,char*format,...);

voidInfoline(char*format,...);

voidProgress(intpromille,char*format,...);

voidFlash(char*format,...);

Addtolist

TheAddtolistfunctionaddssinglelineofASCIItext,uptoTEXTLENcharacterslong,tothelogwindow.

voidAddtolist(longaddr,inthighlight,char*format,...);

Parameters:

addr-memoryaddressassociatedwithlogline.Bydoubleclickingthelineinlogwindow,onecaninstantlyjumptothecorrespondingcodeordatainCPU;

highlight-coloroftext:

0 standardcolor(blackinblackonwhitecolorscheme);1 highlighted(red);-1 grayed(gray);

format-formatstring(asincalltoprintf),followedbyoptionalarguments.

Seealso:Updatelist,Createlistwindow,Message

Updatelist

Iflogwindowispresent,calltothisfunctionforcesimmediateupdateofthelogwindow.Callitifsomeoperationtakesplentyoftimeandyouwanttomakenewmessagesimmediatelyavailableforuser.

voidUpdatelist(void);

Seealso:Addtolist,Createlistwindow,Message

Createlistwindow

Createsorrestoreslogwindow(windowthatdisplayscontentsoflogbuffer)onthescreen.Notethatwritingtobufferdoesn'tdependonwhetherlogwindowispresent;closinglogwindowdoesn'tdestroythecontentsofbuffer.

HWNDCreatelistwindow(void);

Seealso:Addtolist,Updatelist,Message

Displaysmessageboxwithinformationabouterror.Tocontinue,usermustclickOKbutton,pressEnterorEsc.Usethiscallforcriticalerrorsonly;iferrorisnotveryimportant,Flash,MessageorInfolinearebetteralternatives.

voidError(char*format,...);

Parameters:

Seealso:Flash,Message,Infoline

Message

DisplaysmessageonthebottomofmainOllyDbgwindowandaddsittothelogwindow.IfformatisNULL,messagewillberemovedfromthebottomlinebutnotaddedtothelog.Formattedmessagemaycontaindollarsign'$'.Thissymbolisreplacedbydash'-'onthebottomlineandterminateslineaddedtothelog.Forexample,ifyoucallMessage(0,"Criticalerror$pressSPACEtocontinue"),bottomlinewilldisplay"Criticalerror-pressSPACEtocontinue"andlogwindow"Criticalerror".Calltothisfunctionremovesflashandprogressbarfromthebottomline.

voidMessage(ulongaddr,char*format,...);

Parameters:

addr-memoryaddressassociatedwithlogline.Bydoubleclickingthelineinlogwindow,onecaninstantlyjumptothecorrespondingcodeordatainCPU.addrisnotdisplayedinthebottomline;

Seealso:Addtolist,Updatelist,Createlistwindow,Infoline,Progress,Flash

Infoline

DisplaysmessageonthebottomofmainOllyDbgwindow.IfformatisNULL,currentlydisplayedmessagewillberemoved.CalltoInfolineremovesflashandprogressbarfromthebottomline.

voidInfoline(char*format,...);

Parameters:

Seealso:Addtolist,Updatelist,Createlistwindow,Message,Progress,Flash

Progress

DisplaysprogressbaronthebottomofmainOllyDbgwindow.Barwillcontainformattedtextwithattachedpercentofexecution.Formattedtextmaycontaindollarsign'$',inthiscasepersentofexecution,enclosedindashes,isinsertedinsteadofdollrasign.Ifpromilleis0,functionclosesprogressbarrestorespreviouslydisplayedmessage.CallstoMessage,InfolineandFlashalsowillcloseprogressbar.

voidProgress(intpromille,char*format,...);

Parameters:

promille-progress,in1/1000th;

Seealso:Message,Infoline,Flash

DisplayshighlightedmessageonthebottomofmainOllyDbgwindow.Thismessageautomaticallydisappearsin500milliseconds.

voidFlash(char*format,...);

Parameters:

Seealso:Message,Infoline,Progress

Dataformattingfunctions

Thisgroupoffunctionsconvertsbinarydata,likeaddress,floatingnumberorcharactertoASCIItext.FunctionsIstextAandIstextWcheckwhetherASCIIorUNICODEcharactercanbeapartofstring.Isretaddrcheckswhetheraddressisapossiblereturnaddress.

intDecodeaddress(ulongaddr,ulongbase,intaddrmode,char*symb,intnsymb,char*comment);

intDecoderelativeoffset(ulongaddr,intaddrmode,char*symb,intnsymb);

intDecoderange(ulongaddr,ulongsize,char*s);

intDecodecharacter(char*s,uintc);

intDecodeascii(ulongaddr,char*s,intlen,intmode);

intDecodeunicode(ulongaddr,char*s,intlen);

intPrintfloat4(char*s,floatf);

intPrintfloat8(char*s,doubled);

intPrintfloat10(char*s,longdoubleext);

intPrintsse(char*s,char*f);

intPrint3dnow(char*s,char*f);

intIstextA(charc);

intIstextW(wchar_tw);

ulongIsretaddr(ulongretaddr,ulong*procaddr);

intStringtotext(char*data,intndata,char*text,intntext);

Decodeaddress

Decodesmemoryaddresstotextstringandoptionallycommentsit.Returnslengthofdecodedstring(notincludingterminal0),or0onerror.Thedecodingisstronglyinfluencedbyaddrmodeandmayvaryfromsimple01234567toconstructslike<JMP.&USER32.GetSystemMetrics>.Ifaddresshasbothmodule-anduser-definednames,user-definednamehaspriorityandmodule-definednameisplacedincomment.

intDecodeaddress(ulongaddr,ulongbase,intaddrmode,char*symb,intnsymb,char*comment);

Parameters:

addr-addresstodecodeinaddressspaceofdebuggedprogram;

base-addressbelongingtothemoduleselectedascurrentor0ifthereisnocurrentmodule.NecessaryifyousetbitsADC_SAMEMODorADC_DIFFMOD;

addrmode-combinationofADC_xxxbitslistedbelow,determineshowtodecodeaddr.NotethatDecodeaddressdoesnotsupportsomeofADC_xxxdeclaredinplugin.h:

ADC_VALID decodeaddressonlyifitpointstoallocatedmemoryorhasassociatedsymbolicname;

ADC_INMODULE

decodeaddressonlyifitpointstosomemoduleorhasassociatedsymbolicname.Ifyouwanttoavoidcaseswhensomeaddresspointstogapbetweentwomemoryblocksbelongingtoamodule,specifybothADC_VALIDandADC_INMODULEflags;

ADC_SAMEMOD

decodeaddressonlyifitpointstomoduledefinedbyparameterbaseorhasassociatedsymbolicname(constantornamebelongingtodifferentmnodule).ConditionADC_INMODULEisautomaticallytrueandflagneednottobeexplicitelyspecified.

ADC_SYMBOL decodeaddressonlyifithassymbolicnameorifADC_JUMPbitissetandaddresspointstoJMPtosymbolicname;

ADC_JUMPcheckwhetheraddrpointstoJMPtoaddressplacedonsomeimportaddressanddecodeitas<JMP.&MODULE.ImportName>;

ADC_DIFFMODdisplaymodulenameonlyifaddrbelongstomodulewhichdiffersfromthecurrent(specifiedbybase);

ADC_NOMODNAME

neverdisplaymodulename.IfneitherADC_DIFFMODnorADC_NOMODNAMEbitsspecified,modulenameisdisplayedwhenaddressbelongstosomemodule;

ADC_OFFSETifaddresshasasymbolicnameandpointstodatasection,addwordOFFSETbeforethisname(forex.,OFFSETMODULE.DataName);

ADC_STRING decodetocommentthecasewhenaddresspointstoASCIIorUNICODEstring;

ADC_ENTRYdecodetocommentthecasewhenaddressisanentrypointofsomesubroutinewithoutsymbolicname;

symb-pointertobufferoflengthatleastnsymbbyteswhereDecodeaddressplacesdecodedstring;

nsymb-length,incharacters,ofbuffersymb;

comment-pointertostringoflengthatleastTEXTLENbytesorNULL,receivescommentasociatedwithaddr.

Seealso:Decoderelativeoffset,Disasm,Decodeascii,Decodeunicode

Decoderelativeoffset

Ifaddresspointstoavalidcommandwithinthenamedprocedure,decodesaddressinform"module.procedure+offset"or"procedure+offset".Returnslengthofdecodedstringor0onerrororwhenprocedureisnotnamed.

intDecoderelativeoffset(ulongaddr,intaddrmode,char*symb,intnsymb);

Parameters:

addr-absoluteaddresstodecode;

addrmode-combinationofADC_xxxbitslistedbelow,determineshowtodecodeaddr.NotethatDecodeaddressdoesnotsupportsomeofADC_xxxdeclaredinplugin.h:

ADC_NOMODNAME ifbitiscleared,prependnameofprocedurewithmodulename,otherwisemodulenameisomittedADC_NONTRIVIAL ifoffsetis0,donotdecoderelativeoffset

symb-pointertobufferoflengthatleastnsymbbyteswhereDecoderelativeoffsetplacesdecodedstring;

nsymb-length,incharacters,ofbuffersymb.

Seealso:Decodeaddress,Decoderange

Decoderange

Decodesaddressrange,eitherinform"module:section"or"firstaddr..lastaddr".Returnslengthofresultingstring.

intDecoderange(ulongaddr,ulongsize,char*s);

Parameters:

addr-startofaddressrange;

size-sizeofaddressrange;

s-pointertobufferoflengthatleastTEXTLENbytesthatreceivesresultingstring.

Seealso:Decodeaddress,Decoderelativeoffset

Decodecharacter

DecodesASCIIcharacterctostringsandcommentssomecharacterswithspecialmeaning,likeTAB,CRorLF.Returnslengthofdecodedstringor0onerror.

intDecodecharacter(char*s,uintc);

Parameters:

s-pointertobufferoflengthatleastTEXTLENbyteswhereDecodecharacterplacesdecodedstring;

c-charactertodecode.

Seealso:IstextA,IstextW

Decodeascii

DecodesASCIIstringthatstartsataddressaddrinthememoryofdebuggedprocessintostringsoflengthlen.IfmodeisDASC_TESTorDASC_NOHEX,checkswhetherthisreallylookslikeastring,ifDASC_ASCII-decodesasASCIIstring,ifDASC_PASCAL-decodesasPascalstring(notzero-terminated,precededwithbytelength).IfmodeisDASC_NOHEXandvaluepointstoastring,precedesdecodedstringwith"ASCII".Returnslengthofresultingtext,notincludingterminal'\0'.

intDecodeascii(ulongaddr,char*s,intlen,intmode);

Parameters:

addr-addressinthememoryofdebuggedprocesswhereASCIIstringstarts;

s-pointertobufferoflengthatleastTEXTLENbyteswhereDecodeasciiplacesdecodedstring;

len-lengthofstringsinbytes;

mode-decodingmode,oneofthefollowing:

DASC_TEST TestwhetherpointeddatareallylookslikeanASCIIstring.Ifnot,printhexadecimaladdressinsteadofstring

DASC_NOHEX TestwhetherpointeddatareallylookslikeanASCIIstring.Ifnot,return0.

DASC_ASCII ForceASCIIstringDASC_PASCAL ForcePascalstring

Seealso:Decodeunicode,Decodeaddress,Decodecharacter

Decodeunicode

//DecodesUNICODEstringthatstartsataddressaddrinthememoryofdebuggedprocessintoASCIIstringsoflengthlen.Returnslengthofresultingtext,notincludingterminal'\0'.

intDecodeunicode(ulongaddr,char*s,intlen);

Parameters:

addr-addressinthememoryofdebuggedprocesswhereUNICODEstringstarts;

s-pointertobufferoflengthatleastTEXTLENbyteswhereDecodeunicodeplacesdecodedstring;

len-lengthofstringsinbytes.

Seealso:Decodeascii,Decodeaddress,Decodecharacter

Printfloat4

Decodes32-bit(4-byte)floatingpointnumbertoASCIIstring.IfnumberisINForNAN,addshexadecimaldump.Returnslengthofdecodedstring.

intPrintfloat4(char*s,floatf);

Parameters:

s-pointertobufferoflengthatleastTEXTLENbyteswherePrintfloat4placesdecodedstring;

f-32-bitfloatingnumbertodecode.

Seealso:Printfloat8,Printfloat10,Print3dnow,Printsse

Printfloat8

Decodes64-bit(8-byte,double)floatingpointnumbertoASCIIstring.IfnumberisINForNAN,addshexadecimaldump.Returnslengthofdecodedstring.Notethatthisprocedureissaferthanprintf,becausesomeprintfimplementationsgenerateexceptionwhenprocessingINForNAN.

intPrintfloat8(char*s,doubled);

Parameters:

d-64-bit(double)floatingnumbertodecode.

Printfloat10

Decodes80-bit(10-byte,longdouble)floatingpointnumbertoASCIIstring.IfnumberisINForNAN,addshexadecimaldump.Returnslengthofdecodedstring.Notethatthisprocedureissaferthanprintf,becausesomeprintfimplementationsgenerateexceptionwhenprocessingINForNAN.

intPrintfloat10(char*s,longdoubleext);

Parameters:

ext-80-bit(longdouble)floatingnumbertodecode.

Printsse

Decodes128-bitSSEconsistingof432-bitfloatingpointnumberstoASCIIstring.IfanycomponentisINForNAN,displaysitasahexadecimaldump.Returnslengthofdecodedstring.Notethatthisprocedureissaferthanprintf,becausesomeprintfimplementationsgenerateexceptionwhenprocessingINForNAN.

intPrintsse(char*s,char*f);

Parameters:

s-pointertobufferoflengthatleastTEXTLENbyteswherePrintfsseplacesdecodedstring;

f-pointerto16-bytearraycontainingSSEtodecode.

Seealso:Printfloat4,Printfloat8,Print3dnow

Print3dnow

Decodes64-bit3Dnow!number(consistingoftwo32-bitfloatingnumbers)toASCIIstring.Returnslengthofdecodedstring.

intPrint3dnow(char*s,char*f);

Parameters:

s-pointertobufferoflengthatleastTEXTLENbyteswherePrint3dnowplacesdecodedstring;

f-pointerto8-bytebuffercontaining3Dnow!number.

Seealso:Printfloat4,Printfloat8,Printfloat10,Printsse

IstextA

ReturnsPLAINASCII,DIACRITICALortheircombinationifsymbolcanbepartofvalidASCIItext,and0otherwise.Resultisinfluencedbyoption"Allowdiacriticalsymbolsinstrings".

intIstextA(charc);

Parameters:

c-charactertoanalyze.

Seealso:IstextW,Decodecharacter

IstextW

Returnsnon-zeroifwide(UNICODE)charactercanbepartofvalid(fromtheOllyDbg'spointofview)UNICODEstringand0otherwise.Resultisinfluencedbyoption"Allowdiacriticalsymbolsinstrings".

intIstextW(wchar_tw);

Parameters:

w-widecharactertoanalyze.

Seealso:IstextA,Decodecharacter

Isretaddr

Functioncheckswhetherretaddrisapossiblereturnaddress,thatis,pointstothecommandthatimmediatelyfollowsCALLcommand.IfprocaddrisnotNULL,setsprocaddrtodestinationofCALLorto0ifdestinationisnotconstant.ReturnsaddressofCALLcommandifretaddrisapossiblereturnaddressand0otherwise.

ulongcdeclIsretaddr(ulongretaddr,ulong*procaddr);

Parameters:

retaddr-questionedaddressinmemoryspaceofdebuggedapplication;

procaddr-pointertovariablethatreceivesstartaddressofcalledfunctionorNULL.

Stringtotext

DecodesASCIIdataoflengthndata(notnecessarilyNULL-terminated)intothestringoflengthatleastntextbytesaccordingtothemodeofstringdecodingsetinStringoptions.Decodingstopseitherwhenndatasymbolsareprocessed,orcharacter'\0'isemcountered,orwhenoutputstringisfull.Returnslengthofresultingstringor0onerror.

Note:TherearethreedecodingmodescurrentlysupportedbyOllyDbg:

plain "abcdef"Assembler "abc",LF,"def"C "abc\ndef"

intStringtotext(char*data,intndata,char*text,intntext);

Parameters:

data-pointertoinputASCIIdataoflengthndata;

ndata-lengthofinputdatainbytes;

text-pointertothebufferoflengthatleastntextthatreceivesformatedtext;

ntext-sizeofoutputbufferinbytes.

Datainputfunctions

Thesefunctionsinvokedialogwindowallowingusertoenternumberorstringandspecifyrelatedoptions:

intGetlong(char*title,ulong*data,intdatasize,charletter,intmode);

intGetline(char*title,ulong*data);

intGetfloat10(char*title,longdouble*fdata,char*tag,charletter,intmode);

intGetfloat(char*title,void*fdata,intsize,charletter,intmode);

voidGetasmfindmodel(t_asmmodelmodel[NMODELS],charletter,intsearchall);

intGettext(char*title,char*text,charletter,inttype,intfontindex);

intGethexstring(char*title,t_hexstr*hs,intmode,intfontindex,charletter);

intGetmmx(char*title,char*data,intmode);

intGet3dnow(char*title,char*data,intmode);

intBrowsefilename(char*title,char*name,char*defext,intgetarguments);

Mostofthedatainputfunctionshave...xycounterpartallowingtospecifythepositionofthedialogonthescreen.Internally,non-xyfunctionsjustcallxy-enabledfunctionswithx=-1andy=-1.FunctionGetregxyexistsonlyin...xyform:

intGetlongxy(char*title,ulong*data,intdatasize,charletter,intmode,intx,inty);

intGetlinexy(char*title,ulong*data,intx,inty);

intGetfloat10xy(char*title,longdouble*fdata,char*tag,charletter,intmode,intx,inty);

intGetfloatxy(char*title,void*fdata,intsize,charletter,intmode,intx,inty);

voidGetasmfindmodelxy(t_asmmodelmodel[NMODELS],charletter,intsearchall,intx,inty);

intGettextxy(char*title,char*text,charletter,inttype,intfontindex,intx,inty);

intGethexstringxy(char*title,t_hexstr*hs,intmode,intfontindex,charletter,intx,inty);

intGetregxy(char*title,ulong*data,charletter,intx,inty);

intGetmmxxy(char*title,char*data,intmode,intx,inty);

intGet3dnowxy(char*title,char*data,intmode,intx,inty);

FunctionGettableselectionxyallowstocalculatescreenX-Ycoordinatesforstandard(notuser-drawn)tablewindows:

intGettableselectionxy(t_table*pt,intcolumn,int*px,int*py);

Getlong,Getlongxy

Functionsdisplaydialogallowingusertoenter8-,16-or32-bitintegernumberinanyof3formats:hexadecimal,decimalunsignedordecimalsigned,or(ifbitDIA_HEXONLYisset)inhexadecimalformatonly.Optionalcheckboxes"Entireblock"and"Alignedsearch"arecontrolledbybitsDIA_ASKGLOBALandDIA_ALIGNEDandcontrolglobalflagsglobalsearchandalignedsearch.Return0onsuccessand-1iferroroccuredorusercancelledaction.FunctionGetlongxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGetlong(char*title,ulong*data,intdatasize,charletter,intmode);

intGetlongxy(char*title,ulong*data,intdatasize,charletter,intmode,intx,inty);

Parameters:

title-titleofdialogbox;

data-pointerto32-bitbuffercontaininginitialvalueofintegernumber.Onreturn,buffercontainsenteredvalue.Ifusercancelsaction,valueremainsunchanged;

datasize-sizeofintegernumberinbytes(1,2or4).Notethatdependlessondatasize,bufferpointedtobydatanustbe32bits(4bytes)long;

letter-firstcharactertobeenteredindefaultcontrol,or0ifthereisnocharacter.Usefuliffunctioniscalledasareactiononacharacterenteredbyuser;

mode-combinationofDIA_xxxbitsspecifyingadditionalGetlongfeatures:

DIA_HEXONLY hidedecimalinputwindows

DIA_ASKGLOBALdisplaycheckbox"Entireblock"thatcontrolsglobalsearchflag.ActualstateofthisflagisreturnedbycalltoPlugingetvalue(VAL_GLOBALSEARCH)

DIA_ALIGNED

displaycheckbox"Alignedsearch"thatcontrolsalignedsearchflag.Actualstateofthisflagisreturnedbycallto

Plugingetvalue(VAL_ALIGNEDSEARCH)

x-absoluteXscreencoordinate,inpixels,ofthebottomleftcornerofthedialogwindow.Ifnecessary,dialogwillautomaticallyadjustitspositionsothatitremainsvisible;

y-absoluteYscreencoordinate,inpixels,ofthebottomleftcornerofthedialogwindow.

Seealso:Getregxy,Getline,Getfloat,Getfloat10,Getmmx,Get3dnow,Gettableselectionxy

Getline,Getlinexy

Functionsdisplaydialogaskingusertoentersourcelinenumberinunsigneddecimalformat.Return0onsuccessand-1iferroroccuredorusercancelledaction.FunctionGetlinexyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGetline(char*title,ulong*data);

intGetlinexy(char*title,ulong*data,intx,inty);

Parameters:

data-pointerto32-bitbuffercontaininginitialvalueoflinenumber.Onreturn,buffercontainsenteredvalue.Ifusercancelsaction,valueremainsunchanged;

Seealso:Getlong,Getregxy,Getfloat,Getfloat10,Getmmx,Get3dnow,Gettableselectionxy

Getfloat10,Getfloat10xy

Displaydialogaskingusertoenter80-bitfloatingpointnumber,eitherasfloatorashexadecimalcode.PrimarilyorientedoneditingofcontentsofFPUstack.IftagisnotNULL,functionsaskwhethertochangetheassociatedFPUtag.IftagisNULLandbitDIA_ASKGLOBALisset,askwhethertouseglobalsearch.BitDIA_ALIGNEDenablesboxes"Alignedsearch"and"Allow0.1%errormargin".FunctionGetfloat10additionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGetfloat10(char*title,longdouble*fdata,char*tag,charletter,intmode);

intGetfloat10xy(char*title,longdouble*fdata,char*tag,charletter,intmode,intx,inty);

Parameters:

fdata-pointerto80-bitfloatingpointnumber.Onreturn,buffercontainsenteredvalue.Ifusercancelsaction,valueremainsunchanged;

tag-pointertotagassociatedwithFPUregister.Ifuserrequestedchangeofassociatedtag,Getfloat10willsetthistagtovalid,zeroorbaddependingonthecontentsof*fdata;

letter-firstcharactertobeenteredineditcontrol,or0ifthereisnocharacter.Usefuliffunctioniscalledasareactiononanumerickeypressedbyuser;

mode-combinationofDIA_xxxbitsspecifyingadditionalGetfloat10features:

DIA_ALIGNED

displaycheckboxes"Alignedsearch"and"Allow0.1%errormargin"thatcontrolalignedsearchandinexactsearchflags.ActualstateoftheseflagsisreturnedbycallstoPlugingetvalue(VAL_ALIGNEDSEARCH)and

Plugingetvalue(VAL_SEARCHMARGIN)

Seealso:Getlong,Getregxy,Getline,Getfloat,Getmmx,Get3dnow,Gettableselectionxy

Getfloat,Getfloatxy

Displaydialogaskingusertoenterfloatingpointnumberofspecifiedprecision(4,8or10bytes),eitherasfloatorashexadecimalcode.IfbitDIA_ASKGLOBALisset,askwhethertouseglobalsearch.BitDIA_ALIGNEDenablesboxes"Alignedsearch"and"Allow0.1%errormargin".FunctionGetfloatxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGetfloat(char*title,void*fdata,intsize,charletter,intmode);

intGetfloatxy(char*title,void*fdata,intsize,charletter,intmode,intx,inty);

Parameters:

fdata-pointertofloatingpointnumber.Onreturn,buffercontainsenteredvalue.Ifusercancelsaction,valueremainsunchanged;

size-sizeoffloatingpointnumberinbytes(4,8or10);

letter-firstcharactertobeenteredineditcontrol,or0ifthereisnocharacter.Usefuliffunctioniscalledasareactiononakeypressedbyuser;

mode-combinationofDIA_xxxbitsspecifyingadditionalGetfloatfeatures:

DIA_ALIGNED

displaycheckboxes"Alignedsearch"and"Allow0.1%errormargin"thatcontrolalignedsearchandinexactsearchflags.ActualstateoftheseflagsisreturnedbycallstoPlugingetvalue(VAL_ALIGNEDSEARCH)andPlugingetvalue(VAL_SEARCHMARGIN)

x-absoluteXscreencoordinate,inpixels,ofthebottomleftcornerofthedialogwindow.Ifnecessary,dialogwillautomaticallyadjustitspositionsothatit

remainsvisible;

Seealso:Getfloat10,Getlong,Getregxy,Getline,Getmmx,Get3dnow,Gettableselectionxy

Getasmfindmodel,Getasmfindmodelxy

Displaydialogboxallowingusertoenterassemblercommand(imprecisecommandsarealsoaccepted)andcreatesetofsearchmodels.Ifusercancelsinput,model[0].lengthis0.FunctionGetasmfindmodelxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

voidGetasmfindmodel(t_asmmodelmodel[NMODELS],charletter,intsearchall);

voidGetasmfindmodelxy(t_asmmodelmodel[NMODELS],charletter,intsearchall,intx,inty);

Parameters:

model-pointerofarrayofNMODELSt_asmmodelstructuresthatreceivessetofmodelscreatedbyGetasmfindmodelonsuccess;

searchall-ifnonzero,hidescheckbox"Entireblock"thatcontrolsglobalsearchflag.ActualstateofthisflagisreturnedbycalltoPlugingetvalue(VAL_GLOBALSEARCH);

Seealso:Gettext,Gethexstring,Getlong,t_asmmodel,Gettableselectionxy

MAXCMDSIZE

Constantthatdeterminesmaximalpossiblelengthofthevalid80x86command(16bytes).Youmayarguethatmaximalallowedlengthis15;that'scorrect,but16isapowerof2andsoseemsmorepreferrableinacomputerprogram.

#defineMAXCMDSIZE16//Maximallengthof80x86command

TEXTLEN

Constantthatdeterminesmaximalpossiblelengthofnames,textstringsandmessagesinOllyDbg.Asageneralrule,iffunctionreturnsstringanddoesnotcontainitsmaximallengthasaninputparameter,thesizeofstringbuffermustbeatleastTEXTLENcharacters(or2*TEXTLENbytesforUNICODEstrings).Filenamesareanexception,theyarealwaysMAXPATHbyteslong.Allotherexceptionsfromthisruleareclearlydocumentedhere.

#defineTEXTLEN256//Maximallengthoftextstring

t_asmmodel

Typeofstructurethatkeepsassemblersearchmodel.

typedefstructt_asmmodel{//Modeltosearchforassemblercommand

charcode[MAXCMDSIZE];//Binarycode

charmask[MAXCMDSIZE];//Maskforbinarycode(0:bitignored)

intlength;//Lengthofcode,bytes(0:empty)

intjmpsize;//Offsetsizeifrelativejump

intjmpoffset;//OffsetrelativetoIP

intjmppos;//Positionofjumpoffsetincommand

}t_asmmodel;

Members:

code-binarycodeofthecommand.Onlybitsthathave1'ssetincorrespondingmaskbitsaresignificant;

mask-comparisonmask.Searchroutineignoresallcodebitswheremaskissetto0;

length-lengthofcodeandmask,bytes.Iflengthis0,searchmodelisemptyorinvalid;

jmpsize-ifnonzero,commandisarelativejumpandjmpsizeisasizeofoffsetinbytes;

jmpoffset-ifjmpsizeisnonzero,jumpoffsetrelativetoaddressofthefollowingcommand,otherwiseundefined;

jmppos-ifjmpsizeisnonzero,positionofthefirstbyteoftheoffsetincode,otherwiseundefined.

Seealso:Getasmfindmodel

Gettext,Gettextxy

DisplaydialogboxallowingusertoenteroreditASCIItextstring.Thisdialogcontainscomboboxwithseverallastenteredstringsofspecifiedtype.Forsomepredefinedstringtypes,thesestringsaresavedtothe.uddfile.Returnlengthofenteredstringor-1onerrororwhenusercancelledinput.FunctionGettextxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGettext(char*title,char*text,charletter,inttype,intfontindex);

intGettextxy(char*title,char*text,charletter,inttype,intfontindex,intx,inty);

Parameters:

text-pointertobufferatleastTEXTLENbyteslongthatreceivesenteredstring;

type-typeofsavedstrings(0..255).Somestringtypes(NM_xxxorNM_xxx|NMHISTORY)arepredefined.Ingeneral,itissafetousetypesinrange192..254,ofcourse,iftheyarenotusedbyotherplugins.Contactmeifyouneeduniquetypethatisautomaticallysavedto.uddfile;

fontindex-indexofOllyDbgfontusedineditcontrolandcombobox.UseeitherFIXEDFONTor,ifPlugingetvalue(VAL_WINDOWFONT)returnsnon-zero,indexoffontusedinparentwindow;

Seealso:Plugingetvalue,Gethexstring,Browsefilename,Gettableselectionxy

Gethexstring,Gethexstringxy

DisplaydialogboxallowingusertoenteroreditmaskedASCII,UNICODEorhexadecimalstring.Return0onsuccessand-1onerrororwhenusercancelledinput.FunctionGethextsringxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGethexstring(char*title,t_hexstr*hs,intmode,intfontindex,charletter);

intGethexstringxy(char*title,t_hexstr*hs,intmode,intfontindex,charletter,intx,inty);

Parameters:

hs-pointertostringdescriptorthatcontainsinitialdatatobedisplayedinthedialogandonexitcontainsmaskedstringenteredbyuser;

mode-combinationofDIA_xxxbitsspecifyingadditionaloptions.OptionsDIA_DEFHEX,DIA_DEFASCIIandDIA_DEFUNICODEaremutuallyexclusive:

DIA_ASKGLOBAL

ifthisbitiscleared,dialogcontains"Keepsize"checkbox;ifbitisset,dialogcontainscheckboxes"Entireblock"thatcontrolsglobalsearchflagand"Casesensitive"thatcontrolscaseignoringflag.ActualstateofthesethreeflagsisreturnedbycallstoPlugingetvalue(VAL_KEEPSELSIZE),Plugingetvalue(VAL_GLOBALSEARCH)andPlugingetvalue(VAL_IGNORECASE)

DIA_DEFHEX defaultdatatypeishexadecimalDIA_DEFASCII defaultdatatypeisASCIIDIA_DEFUNICODE defaultdatatypeisUNICODE

fontindex-indexofOllyDbgfontusedineditcontrolsandcomboboxes.UseeitherFIXEDFONTor,ifPlugingetvalue(VAL_WINDOWFONT)returnsnon-zero,indexoffontusedinparentwindow;

letter-firstcharactertobeenteredinactiveeditcontrol,or0ifthereisnocharacter.Usefuliffunctioniscalledasareactiononakeypressedbyuser;

Seealso:Plugingetvalue,Gettext,Browsefilename,t_hexstr,Gettableselectionxy

t_hexstr

Typeofstructurethatkeepsmaskedbinarystring.

typedefstructt_hexstr{//Stringusedforhex/textsearch

intn;//Stringlength

chardata[TEXTLEN];//Data

charmask[TEXTLEN];//Mask,0bitsaremasked

}t_hexstr;

Members:

n-lengthofthestringinbytes;

data-arraywithstringdata.Onlythosedatabitsaresignificantwhichhas1incorrespondingbitsofmask;

mask-arraywithmaskdata.

Seealso:Gethexstring

Getregxy

SimilartoGetlongxy,displaydialogallowingusertoenter32-bitintegernumberinanyof4formats:hexadecimal,decimalunsigned,decimalsignedorasasetof4characters.Intendedprimarilytoeditcontentsofgeneral-purposeregistersEAX,EBX,CXandEDX.Returns0onsuccessand-1iferroroccuredorusercancelledaction.

intGetregxy(char*title,ulong*data,charletter,intx,inty);

Parameters:

data-pointerto32-bitbuffercontaininginitialvalueofintegernumber.Onreturn,buffercontainsenteredvalue.Ifusercancelsaction,valueremainsunchanged;

letter-firsthexadecimalcharactertobeenteredinhexcontrol,or0ifthereisnocharacter.Usefuliffunctioniscalledasareactiononacharacterenteredbyuser;

Seealso:Getlongxy,Getline,Getfloat,Getfloat10,Getmmx,Get3dnow,Gettableselectionxy

Getmmx,Getmmxxy

Displaydialogboxallowingusertoenteroredit64-bitMMXnumberasacombinationof8-,16-or32-bitintegersinsigneddecimal,unsigneddecimalorhexadecimalformats.Return0onsuccessand-1onerrororwhenusercancelledinput.FunctionGetmmxxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGetmmx(char*title,char*data,intmode);

intGetmmxxy(char*title,char*data,intmode,intx,inty);

Parameters:

data-pointerto64-bit(8-byte)memoryareacontaininginitialvalueofMMXnumber.Onexit,containsnumbermodifiedbyuser;

mode-reserved,mustbe0;

Seealso:Getlong,Getregxy,Getfloat,Getfloat10,Get3dnow,Gettableselectionxy

Get3dnow,Get3dnowxy

Displaydialogboxallowingusertoenteroredit64-bit3DNow!numberasacombinationoftwofloating-pointorhexadecimal32-bitnumbers.Return0onsuccessand-1onerrororwhenusercancelledinput.FunctionGet3dnowxyadditionallycontainsthepreferredscreencoordinatesofthebottomleftpointofthedialogwindow.

intGet3dnow(char*title,char*data,intmode);

intGet3dnowxy(char*title,char*data,intmode,intx,inty);

Parameters:

data-pointerto64-bit(8-byte)memoryareacontaininginitialvalueof3DNow!number.Onexit,containsnumbermodifiedbyuser;

mode-reserved,mustbe0;

Seealso:Getlong,Getregxy,Getfloat,Getfloat10,Getmmx,Gettableselectionxy

Gettableselectionxy

Calculatesscreencoordinatesofthelefttopcornerofthefirstvisibleselectedlineinthespecifiedcolumnoftablewindow.Returns0onsuccessand-1ifcoordinatescannotbecomputedortableisuser-defined.

Note:thisfunctionfailsiftableisuser-defined!

intGettableselectionxy(t_table*pt,intcolumn,int*px,int*py);

Parameters:

pt-pointertodescriptoroftablewindow;

column-columnintable;

px-pointertovariablethatreceivesXcoordinate(inpixelsofthescreen).Eitherpxorpy(butnotboth)canbeNULL;

py-pointertovariablethatreceivesYcoordinate(inpixelsofthescreen).

Seealso:Datainputfunctions

Browsefilename

Opensdialogboxallowingusertoselectfilenameandadditionalfile-relatedoptions,accordingtospecifiedmode.Inmodes0,1and2returnsTRUEifvalidfilewasselectedandFALSEinanyothercase.

intBrowsefilename(char*title,char*name,char*defext,intmode);

Parameters:

name-pointertobuffercontaininginitialfilename,atleastMAXPATHbyteslong.Onexit,containsnameoffileselectedbyuser;

defext-pointertostringcontainingsetofoneorseveraldefaultextentions.Firstextentionmuststartwithpoint('.').Tospecifyseveralextentions,separatethemwithverticalline('|').Tospecifyseveralextentionsasasingleselection,separatethemwith";*"(like".exe;*.dll").Browsefilenameknowsseveraltypesofextentionsandtheircombinationsandautomaticallycommentsthem;

mode-modeofoperation.Modes3to8arenotintendedforuseinpluginsandarenotdescribedhere:

0 standarddialogwithoutadditionalelements1 dialogwithcombobox"Arguments"2 dialogwithcheckbox"Appendtoexistingfile"

Newinversion1.10:ifmodeisORedwith0x80,BrowsefilenameopensSaveFiledialoginsteadofOpenFile.

Sorteddatafunctions

ManykindsofinternalOllyDbgdataconsistofhomogenouselementsthathasstartandfinaladdressanddonotoverlapwitheachother.Goodexampleisthetableofmemoryblocks.Breakpointsmaybetreatedaselementsoccupying1byteinmemoryspaceofdebuggedprogram.Threadsexistintheaddressspaceofthreadidentifiersandalsooccupy1addressofthisspace.Elementsusuallycanbedisplayedinsomewindowandsortedusingsomecriterium.Setofsuchelementsiscalledsorteddata.

OllyDbgimplementsapowerfulsetoffunctionsthatalloweasyoperationswithsorteddata,likeinitilaization,addingorreplacingofelements,removingofelementsoraddressranges,sorting,searchandsoon.OllyDbgautomaticallyallocatesnewmemoryforsorteddataifnecessary.

Elementsofsorteddataarealwayskeptsortedbyaddressinacontiguousbuffer.Thisallowsforsimpleandextremelyfastbinarysearch.Addingnewdatais,ofcourse,notsoeasyandcantakesignificanttime.Weightedbinarytreesmaylookasabettersolution,butinourcasedataisreadmuchmorefrequentlythanaddedtothetable.Ifyousortdatabymethodotherthanincreasingaddresses,OllyDbgsimplycreatesadditionalarrayofindexespointingtodataelements.

Allelementsofsorteddatabeginwithastandard12-byteheader:

typedefstructt_sortheader{//Headerofsorteddatafield

ulongaddr;//Baseaddressoftheelement

ulongsize;//Sizeoccupiedbyelementinaddressspace

ulongtype;//Typeofdataelement,TY_xxx

}t_sortheader;

Pleasedon'tmixthesizespecifiedinthisheaderandphysicalsizeoftheelement.Theybelongtodifferentaddressspaces!Sizeinheaderisthesizeofpieceofvirtualaddressspacedescribedbysorteddataandusuallybelongstodebuggedprogram.PhysicalsizeofelementisthesizeofmemoryocuppiedbyelementintheOllyDbg'smemory.Allelementshavesamephysicalsize

necessarytofitallthecharacteristicsanddescriptionsofthedescribedobject;sizeinheaderissimplyone(albeitmostimportant)oftheobject'scharacteristicsandmaybedifferentforeachobject.

Inmostcasessorteddatafunctionsignoretypeandyoumayuseitasyouwant.OnlyDeletenonconfirmedsorteddatachecksforbitTY_CONFIRMEDandremovesatonceallelementswherethisbitisnotset(averyfastwaytogetridofunnecessaryelements).Standardheadercanbefollowedbyanyadditionalfields.OllyDbgdoesnotalignsdataelements;toassureeffectivememoryaccess,makephysicalsizeofelementamultipleof4bytes.

Thereisaspecialkindofsorteddatacalledautoarrangeable.Autoarrangeabledataassumesthataddressoftheelementissimplyits0-basedordinalnumberinthedataarrayandsizeoccupiedbyelementinaddressspaceisalways1.Eveninthiscase,elementsmustbeginwithvalidheader.Addsorteddataalwaysinsertsnewitemstoautoarrangeabledataandneverreplacesexisting.

Tocreateyourowntableofsorteddata,firstofallyoumustallocatetabledescriptor(structureoftypet_sorted)andinitializeallitsfieldsto0.ThenyoucallCreatesorteddatatoinitializetableandallocatedatabuffers.Afterinitialization,youcanuseallsorteddatafunctionstochangeorretrievedata.Donotmodifyitemsoftabledescriptordirectly,thismayleadtoseveredataintegrityproblems!

Indexarrayisallocatedonlyifvalidsortfuncisspecified.Toassurethatsorteddataisvalidandcorrectlyinitialized,checkthatdatapointerisnotNULL.Ifnis0,tableisempty(butisnotnecessarilyinitialized).

Tableversionincrementsby1eachtimetableofsorteddatachanges.Thisallowsforeasyimplementationofsmallcache:ifversionisnotchanged,previouslyfetcheddataisstillvalid.Inanyimaginableapplication,wraparoundof32-bitvariableisimpossible.Createsorteddatainitializesversionto1,sosetcacheversionto0toindicatethatcacheisinvalid.

Ifsortedis0,indextablewasnotupdatedafterlastmodificationofthedata.Toforcesorting,callSortsorteddata.Ifdataisalreadysorted,Sortsorteddatareturnsimmediately.

intCreatesorteddata(t_sorted*sd,char*name,intitemsize,intnmax,SORTFUNC*sortfunc,DESTFUNC*destfunc);

voidDestroysorteddata(t_sorted*sd);

void*Addsorteddata(t_sorted*sd,void*item);

voidDeletesorteddata(t_sorted*sd,ulongaddr);

voidDeletesorteddatarange(t_sorted*sd,ulongaddr0,ulongaddr1);

intDeletenonconfirmedsorteddata(t_sorted*sd);

void*Findsorteddata(t_sorted*sd,ulongaddr);

void*Findsorteddatarange(t_sorted*sd,ulongaddr0,ulongaddr1);

intFindsorteddataindex(t_sorted*sd,ulongaddr0,ulongaddr1);

intSortsorteddata(t_sorted*sd,intsort);

void*Getsortedbyselection(t_sorted*sd,intindex);

t_sorted

Typeofdescriptorofsorteddata.

typedefstructt_sorted{//Descriptorofsortedtable

charname[MAXPATH];//Nameoftable,asappearsinerrormessages

intn;//Actualnumberofentries

intnmax;//Maximalnumberofentries

intselected;//Indexofselectedentryor-1

ulongseladdr;//Baseaddressofselectedentry

intitemsize;//Sizeofsingleentry

ulongversion;//Uniqueversionoftable

void*data;//Elements,sortedbyaddress

SORTFUNC*sortfunc;//FunctionwhichsortsdataorNULL

DESTFUNC*destfunc;//DestructorfunctionorNULL

intsort;//Sortingcriterium(column)

intsorted;//Whetherindexesaresorted

int*index;//Indexes,sortedbycriterium

intsuppresserr;//Suppressmultipleoverflowerrors

}t_sorted;

Members:

name-nameofthesorteddata,ofnorealimportance.Youcansetittoemptystringoruseforyourownpurposes;

n-actualnumberofelementsinsorteddata;

nmax-maximalnumberofelementsthatfitinallocatedmemory.Ifnecessary,sorteddatafunctionsallocateadditionalmemorytofitnewelements;

selected-indexofselectedentryindatasortedbyspecifiedcriterium.Onlywhent_sorted.sortedisNULLordataissortedbyaddress,thisindexcoincideswithindexint_sorted.data;

seladdr-baseaddressofselectedelement;

itemsize-sizeofelementofsorteddatainbytes;

version-variablethatincrementsby1eachtimethecontentsofsorteddataischanged.Onecanuseversiontoavoidunnecessarysearchesinsorteddata:aslongasversionremainsunchanged,pointerstoelementsofsorteddataarevalid.Createsorteddatainitializesversionto1;

data-pointertocontiguousbufferthatcontainselementsofsorteddatasortedbyaddress.IfdataisNULL,sorteddataisnotinitialized;

sortfunc-pointertofunctionthatsortsdatabygivencriterium,orNULLifdataisnotsortable.SeeSORTFUNC;

destfunc-pointertodestructorfunctionthatfreesresourcesallocatedbyelementofsorteddata,canbeNULLifelementdoesn'tallocateresources.SeeDESTFUNC;

sort-actualsortingcriterium.OllyDbgpassesthisparametertosortfunc;

sorted-flagindicatingwhetherindexarrayisactual;

index-arraycontainingindexesofelementssortedbyspecifiedcriterium.NULLifdataisnotinitializedorsortfuncisNULL;

suppresserr-flagpreventingfrommultipleerrorreports.

Seealso:Sorteddatafunctions

Createsorteddata

Initializesdescriptorofsorteddata(structuret_sorted).Ifdescriptoralseadycontainsdata,thisdataisdestroyed.Returns0onsuccessand-1onerror.

intCreatesorteddata(t_sorted*sd,char*name,intitemsize,intnmax,SORTFUNC*sortfunc,DESTFUNC*destfunc);

Parameters:

sd-pointertodescriptorofsorteddata;

name-optionalnameofsorteddata,canbeNULL.OllyDbgusesthisnameonlyinsomerarecases;

itemsize-size,inbytes,oftheelementofsorteddata(includingstandardheader);

nmax-initialnumberofdataelementsthatallocatedbuffercankeep.Ifnecessary,OllyDbgwillautomaticallyallocateadditionalmemory;

sortfunc-pointertofunctionthatcomparestwodataelementsaccordingtosortingcriterium,orNULLifdatacannotbesorted.Thiscriteriumisusuallytheindexofcolumnintablewindow.IfyouspecifyAUTOARRANGE,dataisautoarrangeable,thatis,assumesthataddressoftheelementissimplyits(0-based)ordinalnumberinthedataandsizeofelementisalways1.Eveninthiscase,elementmustbeginwithvalidheader.Addsorteddataalwaysinsertsnewitemstoautoarrangeabledataandneverreplacesexisting;

destfunc-pointertofunctionthatiscalledforeachelementbeingremovedfromthetable,orNULLifdestructorisnotnecessary.Youneeddestfunc,forexample,ifelementsofsorteddataallocateadditionalmemorythatmustbefreedbeforeelementisdeleted.

Seealso:Destroysorteddata,SORTFUNC,DESTFUNC

SORTFUNC

TypeofoptionalcallbackfunctionusedbyOllyDbgtosortelementsofsorteddataaccordingtosomecriterium.Thisfunctionreceivestwopointerstoelementsofsorteddataandsortcriterium(whichisusuallytheindexofcolumninthewindowdisplayingsorteddata).Functionmustreturn0ifelementsareequal,1iffirstelementisgreater(comeslater)and-1iffirstelementislessthanthesecond(comesearlier).

AspecialpredefinedsortpseudofunctionAUTOARRANGEmakessorteddataautoarrangeable.SeeCreatesorteddatafordetails.

typedefintSORTFUNC(constt_sortheader*p1,constt_sortheader*p2,constintsort);

Parameters:

p1-pointertothefirstelement;

p2-pointertothesecondelement;

sort-sortcriterium.Irecommendthatyouuse0tosortdatabyaddress.

Seealso:Createsorteddata,Sortsorteddata

DESTFUNC

TypeofoptionalcallbackfunctionusedbyOllyDbgtofreeresourcesallocatedbyelementofsorteddatawhenelementisremoved.CorrespondstodestructorinC++objects.

typedefvoidDESTFUNC(t_sortheader*pe);

Parameters:

pe-pointertotheelementofsorteddatatoberemoved.

Seealso:Createsorteddata

Destroysorteddata

Removesallelementsfromthesorteddataanddeallocatesdatamemory.Ifsorteddatahasdestructorfunction,thisdestructorwillbecalledforeachdeletedelement.

voidDestroysorteddata(t_sorted*sd);

Parameters:

sd-pointertodescriptorofsorteddata.

Seealso:Createsorteddata

Addsorteddata

Addsorreplaceselementininitializedsorteddata.ReturnspointertoiteminthedataifitemiscorrectlyaddedorreplacedandNULLifeitherinputparametersareinvalid,databufferisfullandOllyDbgisunabletoallocatemorememory,newelementcannotreplaceoldbecauseitisneithersubsetnorsupersetoftheolditem,oritoverlapswithtwoormoreexistingelements.Thispointerisvalidtillthenextoperationthataddsorremovesdata.Donotchangeaddressorsizeofelementafteritisaddedtosorteddata,thismayleadtoseveredataintegrityproblems.

void*Addsorteddata(t_sorted*sd,void*item);

Parameters:

sd-pointertoinitializeddescriptorofsorteddata;

item-pointertonewelement.

Seealso:Deletesorteddata,Deletesorteddatarange,Findsorteddata,Findsorteddatarange,Findsorteddataindex

Deletesorteddata

Deleteselementwhichbeginsexactlyatspecifiedaddressfromsorteddata.

voidDeletesorteddata(t_sorted*sd,ulongaddr);

Parameters:

addr-addressofelement.

Seealso:Deletesorteddatarange,Addsorteddata,Findsorteddata,Findsorteddatarange,Findsorteddataindex

Deletesorteddatarange

Deletesallelementswhichcontainatleast1addresswithinthespecifiedrangefromthetableofsorteddata.

voidDeletesorteddatarange(t_sorted*sd,ulongaddr0,ulongaddr1);

Parameters:

addr0-startofaddressrange(included);

addr1-endofaddressrange(notincluded).

Seealso:Deletesorteddata,Addsorteddata,Findsorteddata,Findsorteddatarange,Findsorteddataindex

Deletenonconfirmedsorteddata

DeletesallelementswithtypebitTY_CONFIRMEDresetto0fromsorteddataandresetsthisbitinallremainingelements.Returnsnumberofdeleteditems.Thisisusuallythefastestwaytodeletemultiplenon-adjacentelementsfromthesorteddata.Autoarrangeabledatacannotbedeletedinthisway.

intDeletenonconfirmedsorteddata(t_sorted*sd);

Parameters:

sd-pointertoinitializeddescriptorofsorteddata.

Seealso:Deletesorteddata,Deletesorteddatarange

Findsorteddata

Searchesforelementcontainingspecifiedaddressinsorteddata.ReturnspointertofounditemonsuccessandNULLonerrororwhenthereisnosuchitem.Returnedpointerisvalidtillthenextoperationthataddsorremovesdata.Donotchangeaddressorsizeofelement,thismayleadtoseveredataintegrityproblems.

void*Findsorteddata(t_sorted*sd,ulongaddr);

Parameters:

addr-addressintheaddressspaceofspecifiedsorteddata.

Seealso:Findsorteddatarange,Findsorteddataindex,Getsortedbyselection

Findsorteddatarange

Searchesforthefirstelementofsorteddatacontainingaddresswithinthespecifiedrange.ReturnspointertofounditemonsuccessandNULLonerrororwhenthereisnosuchitem.Returnedpointerisvalidtillthenextoperationthataddsorremovesdata.Donotchangeaddressorsizeofelement,thismayleadtoseveredataintegrityproblems.

void*Findsorteddatarange(t_sorted*sd,ulongaddr0,ulongaddr1);

Parameters:

addr0-startofaddressrangeintheaddressspaceofspecifiedsorteddata(included);

addr1-endofaddressrangeintheaddressspaceofspecifiedsorteddata(notincluded).

Seealso:Findsorteddata,Findsorteddataindex,Getsortedbyselection

Findsorteddataindex

Searchesforthefirstelementofsorteddatacontainingaddresswithinthespecifiedrange.Returnsindexoffounditemonsuccessand-1onerrororwhenthereisnosuchitem.Indexisvalidtillthenextoperationthataddsorremovesdata.

intFindsorteddataindex(t_sorted*sd,ulongaddr0,ulongaddr1);

Parameters:

addr0-startofaddressrangeintheaddressspaceofspecifiedsorteddata(included);

addr1-endofaddressrangeintheaddressspaceofspecifiedsorteddata(notincluded).

Seealso:Findsorteddata,Findsorteddatarange,Getsortedbyselection

Sortsorteddata

Sortssorteddataaccordingtothespecifiedsortcriteriumandsavesresultstotheindexarrayassociatedwithsorteddata.Returns1ifdatawasupdatedand0otherwise.

intSortsorteddata(t_sorted*sd,intsort);

Parameters:

sort-sortcriterium.

Seealso:Createsorteddata,Getsortedbyselection,SORTFUNC

Getsortedbyselection

Returnspointertoelementwithspecifiedindexinsorteddatasortedbyactualcriterium,orNULLonerror.Ifnecessary,functionactualizesassociatedindextable,sopreliminarycalltoSortsorteddataisnotnecessary.Functionisveryusefulforextractionofselectedelementintablewindows.

void*Getsortedbyselection(t_sorted*sd,intselection);

Parameters:

selection-zero-basedindexindatasortedbyselectedsortcriterium.

Seealso:Sortsorteddata,Findsorteddata,Findsorteddatarange

Windowfunctions

AllMDIwindowsinOllyDbgarethesocalledtablewindows.Theyhaveupto17resizablecolumns,unlimitednumberofrowsandhideablebarwhichcanactasastringofbuttons.OllyDbgsupportsresizingofcolumnsandscrollingoftablewindows.Forsimpletablewindows,itautomaticallyaddspossibilitytocopywholetable,roworsingleelementtoclipboardwithoutextracode.TablewindowssupportUNICODE,highlightingandselectionandseveralpseudographicalsymbols.Usercanselectfontandcolourscheme,andsoon.

Ordinarytablewindowsdisplaycontentsofsorteddata.OllyDbgmakesitespeciallyeasyfortheprogrammer,oneonlyneedstosupplyseveralrelativelysimplefunctions.Forexample,functionthatimplementsWM_PAINTfunctionalitysimplyreturnstexttobedrawninspecifiedcell,andfunctionthatallowstosortcontentsofwindowjustcomparestwoelementsofsorteddata.

Custom(user-defined)tablewindowsmaydisplayanydata.DisassemblerandDumparegoodexamplesofcustomwindows.TheyalsoobtainplentyofsupportfromOllyDbg,butrequiresignificantlymoreprogramming.

Tablewindowsaredescribedbystructuret_table.Itisontheresponsibilityoftheprogrammertomaintaindataincustomwindows.Registerpluginclassallocates8additionallongwordsaccessiblebySetWindowLongandGetWindowLong.Firsttwolongwords(withoffsets0and4)arereservedforinternaluse.Youcanfreelyuseremainingoffsets8,12,...,28.

typedefintDRAWFUNC(char*s,char*mask,int*select,t_sortheader*ps,intcolumn);

voidDefaultbar(t_bar*pb);

intTablefunction(t_table*pt,HWNDhw,UINTmsg,WPARAMwp,LPARAMlp);

voidPainttable(HWNDhw,t_table*pt,DRAWFUNCgetline);

voidSelectandscroll(t_table*pt,intindex,intmode);

voidSendshortcut(intwhere,ulongaddr,intmsg,intctrl,intshift,intvkcode);

HWNDNewtablewindow(t_table*pt,intnlines,intmaxcolumns,char*winclass,char*wintitle);

HWNDQuicktablewindow(t_table*pt,intnlines,intmaxcolumns,char*winclass,char*wintitle);

intBroadcast(UINTmsg,WPARAMwp,LPARAMlp);

HWNDCreatedumpwindow(char*name,ulongbase,ulongsize,ulongaddr,inttype,SPECFUNC*specdump);

voidSetdumptype(t_dump*pd,inttype);

voidDumpbackup(t_dump*pd,intaction);

HWNDCreatewatchwindow(void);

HWNDCreatewinwindow(void);

HWNDCreatertracewindow(void);

HWNDCreatethreadwindow(void);

HWNDCreatepatchwindow(void);

Createwatchwindow

Createsneworbringstotopexistingwindowthatcontainswatches.Onlyonesuchwindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.

HWNDCreatewatchwindow(void);

Createwinwindow

Createsneworbringstotopexistingwindowthatlistsallwindows(includingchilds)createdbydebuggedapplication.Onlyonesuchwindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.

HWNDCreatewinwindow(void);

Createthreadwindow

Createsneworbringstotopexistingwindowthatlistsallthreadsofdebuggedapplication.Onlyonesuchwindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.

Createpatchwindow

Createsneworbringstotopexistingwindowthatlistspatchesappliedtodebuggedapplicationincurrentandprevioussessions.Onlyonesuchwindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.

HWNDCreatepatchwindow(void);

t_table

Typeofdescriptoroftableofsorteddata.Startingfromtheversion1.08,thisstructurecontainstwonewelements:colselandhilite.Tokeepitbackwardcompatiblewithpreviousversions,Ihavesplittedhscrollandschemeintotwoshort16-bitvariableseach.

typedefstructt_table{//Windowwithsorteddataandbar

HWNDhw;//HandleofwindoworNULL

t_sorteddata;//Sorteddata

t_barbar;//Bar

intshowbar;//Bar:1-displayed,0-hidden,-1-absent

shorthscroll;//Horiz.scroll:1-displayed,0-hidden

shortcolsel;//ActivecolumninTABLE_COLSELwindow

intmode;//CombinationofbitsTABLE_xxx

intfont;//Fontusedbywindow

shortscheme;//Colourschemeusedbywindow

shorthilite;//Codehighlightingschemeusedbywindow

intoffset;//Firstdisplayedrow

intxshift;//ShiftinXdirection,pixels

DRAWFUNC*drawfunc;//Functionwhichdecodestablefields

}t_table;

Members:

hw-handleofwindowthatdisplayscontentsofthetable,orNULLifthereisno

associatedwindow;

data-descriptorofsorteddata;

bar-descriptorofcolumnsandbarbuttonsinthewindow;

showbar-statusofthebarinwindow:1-barvisible,0-hidden,-1-barispermanentlyhidden;

hscroll-flagindicatingpresenceofthehorizontalscrollinthewindow;

colsel-columnwithselectioninTABLE_COLSELwindow.Ordinarysorteddatawindowsselectcompleterow;TABLE_COLSELwindowsselectsinglecellinthetable;

mode-combinationofbitsTABLE_xxxdescribingadditionaltableproperties.Pluginscanusefollowingbits:

TABLE_DIRBottom-to-toptablewithreversedorderoflines.Logwindowisanexampleofthebottom-to-toptable

TABLE_COPYMENUAttachcopymenuitemTABLE_SORTMENU AttachsortmenuTABLE_APPMENU AttachappearancemenuTABLE_WIDECOL AttachwidecolumnsmenuitemTABLE_USERDEF User-drawntableTABLE_NOHSCR Tablecontainsnohorizontalscroll

TABLE_SAVEPOS Savepositionofwindowtothe.inifile

TABLE_FASTSEL UpdatewhelselectionchangesTABLE_HILMENU AttachhighlightingmenuTABLE_ONTOP AttachAlwaysontopmenu

font-indexoffontusedtopaintwindow;

scheme-colourschemeusedtopaintwindow;

hilite-codehighlightingschemeusedtodisplaydisassembledcode,or0if

highlightingisdisabledornotapplicable;

offset-indexoffirstrowvisibleinthewindow;

xshift-horizontalshiftinpixels;

drawfunc-functionthatpreparesdatausedtopaintwindow,seeDRAWFUNC.

DRAWFUNC

Typeofpointertocallbackfunctionthatpreparesdataforpaintingintablewindows.Givenlineandcolumn,functionmustprepareASCIIorUNICODEstringthatwillbedisplayedontheirintersection.Ifstringcontainsgraphicalsymbols,orwhenitusesdifferentcolors,functionmustfillmaskwithindividualgraphicalattributesforeachcharacter.Functionreturnsnumberofcharacters(UNICODE:widecharacters)inpreparedstring.Stringisnotnecessarilynull-terminated.

Forstandardtablewindows(bitTABLE_USERDEFint_table.modeiscleared),parameterpspointsdirectlytotheelementofsorteddata.

Foruser-definedtablewindow(TABLE_USERDEFisset),psisapointertothestructuret_tablethatdescribesthiswindow.BeforeOllyDbgcallsDRAWFUNC,itsetst_table.offsettotheindexofcurrentlyprocessedlineintablewindow(topmostdisplayedlinehasindex0)andsetstable.data.ntothetotalnumberofcompletelyorpartiallyvisiblelines.Drawingfunctioniscalledonceforeverycrossingofvisiblerowwithvisiblecolumn.Individualdecodingofeachitemmayimposesevereoverheadandmakedrawingslow.SoOllyDbgsetstable.data.netonlyonceatthebeginningofthesequence.Drawingfunctionmayuseitasacommandtopreparetheentireblockofrequesteddatainsomestaticbufferandthenresetnto0.ItisguaranteedthatsequenceofcallstoDRAWFUNCwillnotbeinterruptedbycallwithdifferentt_table.

Toimplementscrollingincustomwindow,itswindowproceduremustprocessseveralcustommessages.

typedefintDRAWFUNC(char*s,char*mask,int*select,t_sortheader*ps,intcolumn);

Parameters:

s-pointertobufferforoutputstringofsizeatleast2*TEXTLENcharacters.LengthofreturnedstringmustnotexceedTEXTLENASCIIorUNICODEcharacters.IffunctionreturnsUNICODEstring,itmustsetbitDRAW_UNICODEin*select.Stringisnotnecessarilynull-terminated;

mask-arrayofindividualgraphicalattributesforeverycharacterinoutput

string.OllyDbgusesmaskonlyifDRAWFUNCsetsbitDRAW_MASKin*select.EachbyteofthemaskisacombinationofbitsDRAW_xxx,seedetaileddescriptionbelow;

select-pointertographicalattributescommontoallcharactersinoutputstring.*selectisacombinationofbitsDRAW_xxx,seedetaileddescriptionbelow;

ps-forstandardtablewindows(withoutattributeTABLE_USERDEF),pointertotheelementofsorteddatatobedecoded.Forcustom(user-defined)windows,castpstopointertostructuret_tablethatdescribescustomwindow,seedetaileddescriptionabove;

column-zero-basedindexoftheprocessedcolumn.Notethatifcolumnisnotvisibleatall,OllyDbgdoesnotcallDRAWFUNC.

MeaningofbitsDRAW_xxx

MaskandselectconsistofcombinationofbitsDRAW_xxx.Theyaresummarizedinthetablebelow.Notethatbitswhicharenotallowedinthemaskmayhavevaluesthatdon'tfitintobyte:

Bitallowedin: select mask DRAW_NORMAL * * normalplaintextDRAW_GRAY * * grayedtextDRAW_HILITE * * highlightedtextDRAW_UL * underlinedtextDRAW_SELECT * * selectedbackgroundDRAW_EIP * * invertednormaltext/backgroundDRAW_BREAK * * breakpointbackgroundDRAW_GRAPH * graphicalsymbol,seebelow

DRAW_DIRECT * directtextandbackgroundcolourindices

DRAW_MASK * useindividualmaskattributesforeachsymbol

DRAW_EXTSEL * extendselectionfromlastmasktillendofcolumn

DRAW_UNICODE * textisinUNICODE

DRAW_TOP * drawtophalfofthetextshifted1/2rowdown

DRAW_BOTTOM * drawbottomhalfofthetextshifted1/2rowup

Ifentirestringhassamehighlightandselectionattributes,don'tsetDRAW_MASK.OllyDbgignoresmaskandusesonlyattributesfrom*select.AttributesDRAW_NORMAL,DRAW_GRAYandDRAW_HILITEaremutuallyexclusive.YoucannotsetDRAW_EIPtogetherwitheitherDRAW_SELECTorDRAW_BREAK.IfbitsDRAW_BREAKandDRAW_SELECTaresetsimultaneously,backgroundcorrespondstothatofconditionalbreakpoint.

Tohighlightandselecteachcharacterindividually,setDRAW_MASKin*selectandfillinthemaskwithcombinationofbitsdescribingcorrespondingcharacterinoutputstring.BitDRAW_HILITEinthemaskhaspriorityover*select.BitsDRAW_GRAY,DRAW_SELECT,DRAW_EIPandDRAW_BREAKin*selecthavepriorityoverremainingbitsinmask.Maskalsoallowstodrawpseudographicalcharacters.IfDRAW_GRAPHbitisset,characterisdecodedinaspecialway:

Symbol Char MeaningD_SPACE 'N' spaceD_SEP '' thinverticalseparatinglineD_POINT '.' pointD_BEGIN 'B' beginofprocedure,looporstackscopeD_BODY 'I' bodyofprocedure,looporstackscopeD_ENTRY 'J' loopentrypointD_LEAF 'K' IntermediateleafonatreeD_END 'E' endofprocedure,looporstackscopeD_SINGLE 'S' scopeconsistingofsinglelineD_ENDBEG 'T' beginandendofstackscopeD_JMPUP 'U' smallthinarrowupstairs(jumpupstairs)D_JMPOUT '<' shortdash(jumptodifferentmodule)

D_JMPDN 'D' smallthinarrowdownstairs(jumpdownstairs)

D_PATHUP 'u' startofhighlightedjumppathupstairsD_GRAYUP 'v' startofgrayedjumppathupstairsD_PATHDN 'd' startofhighlightedjumppathdownstairsD_GRAYDN 'e' startofgrayedjumppathdownstairsD_PATH 'i' bodyofhighlightedjumppathD_GRAYPATH 'j' bodyofgrayedjumppathD_PATHUPEND 'r' endofhighlightedjumppathupstairsD_GRAYUPEND 's' endofgrayedjumppathupstairsD_PATHDNEND 'f' endofhighlightedjumppathdownstairsD_GRAYDNEND 'g' endofgrayedjumppathdownstairsD_PATHPTUP 'a' jumpentryupstairs(highlighted)D_PATHPTDN 'h' jumpentrydownstairs(highlighted)D_PATHEND 'z' two-sidedendofjump(highlighted)D_SWTOP 't' startofswitchD_SWBODY 'b' switchbodyD_CASE 'c' intermediateswitchcaseD_LASTCASE 'l' lastswitchcase

Anyothercharacterisdisplayedasspace.

OllyDbgallowsdirectsettingofforegroundandbackgroundcolourforeachcharacterinthestring.Tousethisfeature,allowmaskin*selectandfillcorrespondingmaskbyteswiththefollowingdata:

DRAW_DIRECTORedwithbackgroundcolourORedwithforegroundcolour,

wherebackgrondcolourisoneofBKxxxconstantsdefinedinplugin.h(BKTRANSPfordefaultbackground),andforegroundcolourisanycolourinrange0..15.Colours16to19arenotsupported.Youcan'tcombineDRAW_DIRECTwithanyotherDRAW_xxxflagsinthemask.

IfbitBAR_SHIFTSELissetfortheactualcolumn,backgroundwillbeshifted1/2charactertotheleft.Thisisanicetrickallowingbetterhighlighting.Inthiscaseassurethatlasthighlightedcharacterisaspace.

OllyDbg'sRegisterwindowisalsoacustomtablewindow.PleasehaveacloselookonEIPandEFL:theyareshifteddownby1/2line!Howisitpossible?Well,hereIuseanothertrick:Idrawtheselinestwice,firsttimewithbitDRAW_TOPandsecondtimewithbitDRAW_BOTTOM.However,thistrickisrelativelytime-consuming,andmousewillselectwithineachcompleteline.Idonotrecommendeditforthefuture.

Defaultbar

Setsdefaultwidthsofthecolumnsintablewindowinaccordancewithcurrentlyselectedfont.Youmustredrawwindowtomakeeffectofthisfunctionvisible.

voidDefaultbar(t_bar*pb);

Parameters:

pb-pointertobardescriptor.

Tablefunction

Defaultwindowfunctionforalltablewindows,implementsmostoftheirfunctionality.CallitonlyasareactiononreceivedWM_xxxmessage.Returnvaluedependsonthemessage,itissafetopassthisvaluetotheoperatingsystem.Forstandardtablewindows,alwayspassfollowingmessagestoTablefunction:

WM_DESTROY

WM_MOUSEMOVE

WM_LBUTTONDOWN

WM_LBUTTONDBLCLK

WM_LBUTTONUP

WM_RBUTTONDOWN

WM_RBUTTONDBLCLK

WM_HSCROLL

WM_VSCROLL

WM_TIMER(unprocessedmessagesonly)

WM_KEYDOWN(unprocessedmessagesonly)

WM_SYSKEYDOWN(unprocessedmessagesonly)

WM_WINDOWPOSCHANGED(tosupportAlwaysontopoption)

TablefunctionalsoprocessesmostofcustomOllyDbgmessagesfromstandardtablewindows.Customwindowsusuallymustprocessthesemessagesbyitself.

intTablefunction(t_table*pt,HWNDhw,UINTmsg,WPARAMwParam,LPARAMlParam);

Parameters:

hw,msg,wParam,lParam-messageparametersasreceivedfromWindows.

Seealso:Custommessages

Custommessages

OllyDbgdefinesfollowingcustommessagesthatmustbeprocessedbytablewindows:

WM_USER_MENU activatecontext-sensitivemenuWM_USER_SCR (*) redrawscroll(s)WM_USER_VABS (*) scrollcontentsofwindowbylines

WM_USER_VREL (*) scrollcontentsofwindowbypercent

WM_USER_VBYTE (*) scrollcontentsofwindowbybytesWM_USER_STS (*) startselectioninwindowWM_USER_CNTS (*) continueselectioninwindowWM_USER_CHGS (*) movesingle-lineselection

WM_USER_BAR messagefrombarsegmentactingasbutton

WM_USER_DBLCLK doubleclickincolumnWM_USER_CHALL redraw(almost)everything

WM_USER_CHMEM rangeofdebuggee'smemorychanged

WM_USER_CHREG debuggee'sregister(s)changed

Standardtablewindowsusuallyredirectmessagesmarkedwithasterisk(*)toTablefunction.

Seealso:Tablefunction

WM_USER_MENU

CustommessagesenttotablewindowwhenuserpressesrightmousebuttonorshortcutAlt+F10.Windowshouldcreateandfillpop-upmenuandpassthismessagetoTablefunctionwithmenuhandleinparameterlp.Windowcanuseidentifiersfrom1toMENU_SORT-1(0x27F)andfromMENU_APPMAX+1(0x300)toMENU_PLUGIN-1.ItcanpassNULLifonlystandardmenusarerequired.

Tablefunctionchecksforattributeslistedint_table.modeandperformsfollowingactions:

Attribute Action

TABLE_COPYMENU

Ifsomelineisselected,addsmenuitem"Copy".ThisattributealsoaddsprocessingofkeyboardshortcutsCtrl+CandCtrl+Ins

TABLE_SORTMENU

Addssubmenu"Sortby"withalistofallbarsegmentswithoutBAR_NOSORT.Tohidepartofthesegmenttitleinmenu,separateitwith'$'

TABLE_APPMENUAddssubmenu"Appearance"thatincludesbar,column,fontandcolouroptions

TABLE_WIDECOL

WhensetsimultaneouslywithTABLE_APPMENU,addsmenuitem"Widecolumns",allowingtodoubledefaultwidths

TABLE_HILMENU

WhensetsimultaneouslywithTABLE_APPMENU,addsmenuitem"Highlighting",allowingtoselectoneofcodehighlightingschemes

TABLE_ONTOPAddsmenuitem"Alwaysontop"thatallowstokeeponeMDIwindowalwaysvisible

OnreturnfromTablefunction,windowgetsidofselecteditem.IfselectionisprocessedinternallybyTablefunction,orwhenthereisnoselection,itgets0.Windowthenmustdestroyallnewlycreatedmenus,processselectionandreturntocaller.

Seealso:Tablefunction

WM_USER_SCR

Askswindowtoupdatehorizontalandverticalscrollbars.SimplypassthismessagetoTablefunction.

WM_USER_VABS

Thismessagerequeststablewindowtoscrollverticallyby(signed)numberoflinesspecifiedinlParam.PositivelParammeansscrollingforwardindata(contentsofwindowmovesup),negative-backward.wParamcontainsnumberofdatalinescompletelyvisibleinthewindow(1ifdataareaissmallerthan1line).IflParamis0,messagerequeststocalculatenewpositionofverticalscrollbar.

StandardtablewindowshouldsimplypassthismessagetoTablefunction.

Owner-drawnwindowmustmodifytabledatabutneitherredrawnorinvalidatethewindow.Ifwindow'sappearanceremainsunchangedandlParamisnot0,windowfunctionmustreturn-1.Ifwindowsupportsbytescrolling,itmustreturn(indexoftopmostline)*MAXTRACK/(totalnumberoflines).IftotalnumberoflinesislessthanorequaltowParam,itreturns0.Otherwise,itmustreturn(indexoftopmostline)*MAXTRACK/(totalnumberoflines-wParam).AsconstantMAXTRACKisrelativelybig,useMulDivtocalculatereturnvalue.

WM_USER_VREL

Thismessagerequestsverticalscrollingtothepositionrelativetothetotalsizeofthetable.wParamcontainsnumberofcompletelyvisiblelinesinthewindow(1ifdataareaissmallerthan1line).lParamcontainsnewscrollingpositionin1.0/MAXTRACKpartsofthetotalheightofthetable.

Ifcustomtablewindowsupportsbytescrolling,itmustmakelinewithindex(totalnumberoflines)*lParam/MAXTRACKtopmostvisibleinthewindow.Ifbytescrollingisnotsupported,itmustbeline(totalnumberoflines-wParam)*lParam/MAXTRACK.Windowisnotallowedtoeitherredraworinvalidatethewindow.Ifwindow'sappearanceremainsunchanged,windowfunctionmustreturn-1.Ifwindowsupportsbytescrolling,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines).IftotalnumberoflinesislessthanorequaltowParam,itreturns0.Otherwise,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines-wParam).AsconstantMAXTRACKisrelativelybig,useMulDivtocalculatereturnvalue.

WM_USER_VBYTE

ThismessagerequeststablewindowtoscrollupordownlParambytes.wParamcontainsnumberofcompletelyvisiblelinesinthewindow(1ifdataareaissmallerthan1line).

StandardtablewindowshouldsimplypassthismessagetoTablefunctionwhereitisinterpretedasWM_USER_VABS.

Customtablewindowmustmodifydatabutneitherredrawnorinvalidatethewindow.Ifpositionofdataremainsunchanged,window'sfunctionmustreturn-1.Ifwindowsupportsbytescrolling,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines).IftotalnumberoflinesislessthanorequaltowParam,itreturns0.Otherwise,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines-wParam).AsconstantMAXTRACKisrelativelybig,useMulDivtocalculatereturnvalue.

WM_USER_STS

Messagerequeststablewindowtostartselection.HIWORD(wParam)containscolumnwhereselectionbegins,LOWORD(wParam)-Xoffsetwithinthecolumnincharacterwidths,lParam-Yoffsetwithinthewindowincharacterheigths.

Customtablewindowmustmodifydatatoreflectstartofselectionbutneitherredrawnorinvalidatethewindow.Itmustreturn1ifscreenappearanceischanged,0ifnotand-1ifstartofselectionatthispointisnotpossible.

WM_USER_CNTS

MessageissenttotablewindowtocontinueselectionstartedbyWM_USER_STS.HIWORD(wParam)containscolumnwithcurrentendofselection,LOWORD(wParam)-Xoffsetwithinthecolumnincharacterwidths,lParam-Yoffsetwithinthewindowincharacterheigths.

Customtablewindowmustmodifydatatoreflectchangeofselectionbutmustneitherredrawnorinvalidatethewindow.Itreturns1ifscreenappearanceischangedand0ifnot.

WM_USER_CHGS

Messagerequeststablewindowtochangeselectiontosingle-line,moveselectionupordownbylParamlinesandscrollwindowsothatselectionisstillvisible.SpeciallParamvaluesofMOVETOPandMOVEBOTTOMmoveselectiondirectlytofirstorlastlineinthetable.wParamcontainsnumberofcompletelyvisiblelinesinthewindow(1ifdataareaissmallerthan1line).

Ifwindowdoesnotsupportsingle-lineselection,itmustscrollbyspecifiednumberoflines.

Standardtablewindow(whichanywaydoesnotallowmultilineselection)shouldsimplypassthismessagetoTablefunction.

Customtablewindowmustmodifydatabutneitherredrawnorinvalidatethewindow.Ifpositionofdataremainsunchanged,window'sfunctionmustreturn-1.Ifwindowsupportsbytescrolling,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines).IftotalnumberoflinesislessthanorequaltowParam,itreturns0.Otherwise,itmustreturn(topmostline)*MAXTRACK/(totalnumberoflines-wParam).AsconstantMAXTRACKisrelativelybig,useMulDivtocalculatereturnvalue.

WM_USER_BAR

BarsegmentwithmodebitBAR_BUTTONworksasabuttonand,whenpressed,sendsthismessagetothewindowwhichownsbar.wParamcontainscolumn,lParamis0.OllyDbgignoresvaluereturnedbythismessage.

WM_USER_DBLCLK

Whenuserdoubleclicksleftmousebuttonwithinthedataarea(butneitherinbarnoroverthedividingline),tablewindowreceivesthismessage.HIWORD(wParam)containscolumn,LOWORD(wParam)-Xoffsetwithinthecolumnincharacterwidths,lParam-Yoffsetwithinthewindowinrows.Ifwindowprocessesthismessage,itmustreturn1,otherwisedoubleclickistreatedassimpleclick.

WM_USER_CHALL

Duetochangesindebuggedapplicationordisplayoptions,windowmustbeupdated.Window'sprocedureisexpectedtopostponeredrawingusingactualdataandreturnCONT_BROADCAST.

WM_USER_CHMEM

MemoryofdebuggedprocessinrangefromwParam(included)tolParam(notincluded)ispossiblychanged.UpdatewindowifnecessaryandreturnCONT_BROADCAST.

WM_USER_CHREG

Someregistersofdebuggedprocess(general-purpose,FPU,MMXetc.)arechanged.UpdatewindowifnecessaryandreturnCONT_BROADCAST.

Painttable

ImplementsprocessingofWM_PAINTmessageforalltablewindows.CallthisfunctiononlywhenprocessingWM_PAINT.

voidPainttable(HWNDhw,t_table*pt,DRAWFUNCgetline);

Parameters:

hw-handleofwindowtoberedrawn;

getline-pointertocustomfunctionthatpreparesdatatobedrawninspecifiedcelloftablewindow.

Seealso:DRAWFUNC

Selectandscroll

Selectselementofsorteddatawithspecifiedindexaccordingtocurrentsortmodeandscrollswindowsothatselectionisvisible.Thisfunctionneitherredrawsnorinvalidatesnorcreateswindowandhasnoeffectonowner-drawntablewindows.

voidSelectandscroll(t_table*pt,intindex,intmode);

Parameters:

index-indexofelementofsorteddataaccordingtocurrentsortmode;

mode-requestforpositionofselectedlineinwindow.Ifmodeis0,thisisalwaysthetopmostline,if1-lineinthemiddleofthedataarea,2-selectedautomatically(recommendedwhencallingfunctionwalksthroughalltableentries).

Sendshortcut

EmulateseitherglobalkeyboardshortcutorshortcutinsomeCPUsubwindow.Designedprimarilyforuseincommandlineplugin.

voidSendshortcut(intwhere,ulongaddr,intmsg,intctrl,intshift,intvkcode);

Parameters:

where-addresseeoftheemulatedkeyboardshortcut:

PM_MAIN Mainwindow(globalshortcut)

PM_DISASM CPUDisassemblerPM_CPUDUMP CPUDumpPM_CPUSTACK CPUStackPM_CPUREGS CPURegisters

addr-forallCPUsubwindowsexceptPM_CPUREGS,addresstowhichshortcutisapplied.IgnoredifwhereisPM_CPUREGSorPM_MAIN;

msg-keyboardmessagetoemulate:WM_KEYDOWN,WM_SYSKEYDOWNorWM_CHAR;

ctrl-emulatedstateofControlkeyonthekeyboard(0-released,1-pressed);

shift-emulatedstateofShiftkeyonthekeyboard(0-released,1-pressed);

vkcode-keytoemulate,characteroroneofVK_xxx(forexample,VK_F1toemulateF1key).

Quicktablewindow

Ifwindowalreadyexists,restoresitandbringstothetop.Otherwise,setsdefaultappearanceparametersandcreatesnewwindow.Ifrecordwithwindow'stitlealreadyexistsinollydbg.ini,tablehasTABLE_SAVEPOSattributeandoption"Restorewindowspositionandappearance"isselected,restoresoldposition,sizeandappearance.ReturnspointertowindoworNULLonerror.Notethatalternativefunction,Newtablewindow,neitherrestoreswindownorchangesitsappearance.

HWNDQuicktablewindow(t_table*pt,intnlines,intmaxcolumns,char*winclass,char*wintitle);

Parameters:

nlines-preferrednumberofvisiblelines;

maxcolumns-preferrednumberofvisiblecolumns;

winclass-nameofregisteredwindowclass(forexample,obtainedfromcalltoRegisterpluginclass);

wintitle-window'stitle.IftablehasTABLE_SAVEPOSattribute,OllyDbgusestitletosaveandrestorewindow'spositionandappearance.

Seealso:Registerpluginclass,Newtablewindow

Newtablewindow

Createsnewtablewindow.Ifrecordwithwindow'stitlealreadyexistsinollydbg.ini,tablehasTABLE_SAVEPOSattributeandoption"Restorewindowspositionandappearance"isselected,restoresoldposition,sizeandappearanceofthetablewindow.ReturnspointertowindoworNULLonerror.Notethatalternativefunction,Quicktablewindow,restoreswindowifitalreadyexistsandsetsdefaultappearanceparameters.

HWNDNewtablewindow(t_table*pt,intnlines,intmaxcolumns,char*winclass,char*wintitle);

Parameters:

nlines-preferrednumberofvisiblelines;

maxcolumns-preferrednumberofvisiblecolumns;

winclass-nameofregisteredwindowclass(forexample,obtainedfromcalltoRegisterpluginclass);

wintitle-window'stitle.IftablehasTABLE_SAVEPOSattribute,OllyDbgusestitletosaveandrestorewindow'spositionandappearance.

Seealso:Registerpluginclass,Quicktablewindow

Createdumpwindow

Createsnewdumpwindowthatcanshoweithercontextoffileormemoryrangeofdebuggedprograminoneofpredefineddumpformats.ReturnshandleofcreatedwindoworNULLonerror.Numberofsimultaneouslydisplayeddumpwindowsis(theoretically)unlimited.

HWNDCreatedumpwindow(char*name,ulongbase,ulongsize,ulongaddr,inttype,SPECFUNC*specdump);

Parameters:

name-ifparametersizeis0,nameoffiletodisplay,otherwisewindow'stitleorNULL,inthislastcaseOllyDbggeneratestitleautomatically;

base-ifsizeis0,baseisignored,otherwisethisisthebaseaddressofdisplayedmemoryrange;

size-0ifwindowshoulddumpcontentsoffile,orsizeofdisplayedmemoryrangeotherwise;

addr-addressoroffsetofthefirstelementdisplayedafterwindowiscreated;

type-combinationofdumptype(oneofDU_xxx),numberofitemsperline((n<<8)&DU_COUNT)andsizeofsingleitem(l&DU_SIZE).Forvariable-lengthtypessizeis1.Seetablebelowforalistofcommonlyuseddumptypes;

specdump-functionthatperformsspecialdatadecoding,settoNULL.

Commonlyuseddumptypes:

0x01101 Hex/ASCII(16bytes)0x01081 Hex/ASCII(8bytes)0x0A101 Hex/UNICODE(16bytes)0x0A081 Hex/UNICODE(8bytes)0x02401 ASCII(64chars)0x02201 ASCII(32chars)0x03402 UNICODE(64chars)

0x03202 UNICODE(32chars)0x04082 Signedshortdecimal0x05082 Unsignedshortdecimal0x06082 Shorthex0x04044 Signedlongdecimal0x05044 Unsignedlongdecimal0x06044 Longhex0x08014 Address0x0B041 AddresswithASCIIdump0x0C041 AddresswithUNICODEdump0x07044 32-bitfloat0x07028 64-bitdouble0x0701A 80-bitlongdouble0x09011 Disassemble0x0D001 PEheader

Seealso:Setdumptype,Dumpbackup

Setdumptype

Setsorchangestypeofinformationdisplayedindumpwindow.Windowassociatedwithpdisnotupdated,youmustinvalidateittovisualizethischange.

voidSetdumptype(t_dump*pd,inttype);

Parameters:

pd-pointertodumpdescriptor;

type-combinationofdumptype(oneofDU_xxx),numberofitemsperline((n<<8)&DU_COUNT)andsizeofsingleitem(l&DU_SIZE).Forvariable-lengthtypessizeis1.Seetablehereforalistofcommonlyuseddumptypes.

Seealso:Createdumpwindow,Dumpbackup

Dumpbackup

Functionperformsspecifiedbackupaction(likecreatingorupdatingbackup,readingbackupfromfile,destroyingbackupetc.)onthedump.Ifactioninvolvesfileoperations(readdatafromfile,savedataorbackuptofile),userispromptedtoselectfilename.Functionneitherredrawsnorinvalidatesbackupwindow.

voidDumpbackup(t_dump*pd,intaction);

Parameters:

pd-pointertodumpdescriptor;

action-constantthatspecifiesrequestedbackupaction:

BKUP_CREATE CreateorupdatebackupcopyBKUP_VIEWDATA VieworiginaldataBKUP_VIEWCOPY ViewbackupcopyBKUP_LOADCOPY ReadbackupcopyfromfileBKUP_SAVEDATA SaveoriginaldatatofileBKUP_SAVECOPY SavebackupcopytofileBKUP_DELETE Deletebackupcopy

Seealso:Createdumpwindow,Setdumptype

Broadcast

FunctionsendsmessagetoallopenMDIwindows.StopseitheraftermessageissenttoallwindowsorwhensomewindowreturnsSTOP_BROADCAST.UsuallyusedtobroadcastcustommessagesWM_USER_CHALL,WM_USER_CHMEMandWM_USER_CHREG.Notethatyoudon'tneedtobroadcastWM_USER_CHMEMaftercalltoWritememorywithmodeflagMM_RESTORE.

intBroadcast(UINTmsg,WPARAMwParam,LPARAMlParam);

Parameters:

msg-messagetobebroadcasted;

wParam-firstmessageparameter;

lParam-secondmessageparameter.

Seealso:Writememory,WM_USER_CHALL,WM_USER_CHMEM,WM_USER_CHREG

Namefunctions

Anyzero-terminatedASCIIstringthatisshorterthanTEXTLENcharacterscanbeanamefromtheOllyDbg'spointofview.Everynamehasassociated32-bitaddressand8-bittype.OllyDbgstoresallnamesinahugecentralizeddynamicalbufferthatcankeepupto10,000,000names,providedofcoursethatyouhaveenoughmemory.Whenusedcorrectly,namefunctionsareveryfast.

Severalnametypesarepredefined:

NM_NONAME UndefinednameNM_ANYNAME Nameofanytype

Namesthatarestoredinthe.uddfileofmodulewheretheyappear:

NM_LABEL User-definedlabelNM_EXPORT Exported(global)nameNM_IMPORT Importedname

NM_LIBRARY Nameextractedfromlibrary,objectfileordebugdata

NM_CONST User-definedconstant(currentlynotimplemented)

NM_COMMENT User-definedcomment

NM_LIBCOMM Automaticallygeneratedcommentfromlibraryorobjectfile

NM_BREAK ConditionrelatedwithbreakpointNM_ARG ArgumentsdecodedbyanalyserNM_ANALYSE CommentaddedbyanalyserNM_BREAKEXPR ExpressionrelatedwithbreakpointNM_BREAKEXPL ExplanationrelatedwithbreakpointNM_ASSUME AssumefunctionwithknownargumentsNM_STRUCT CodestructuredecodedbyanalyzerNM_CASE Casedescriptiondecodedbyanalyzer

NM_PLUGCMD Plugincommandstoexecuteatbreakpoint

Namesthatarestoredinthe.uddfileofmainmodule:

NM_INSPECT Severallastenteredinspectexpressions

NM_WATCH Watchexpressions

NM_ASM Severallastenteredassembledstrings

NM_FINDASM Severallastenteredassemblersearchstrings

NM_LASTWATCH Severallastenteredwatchexpressions

NM_SOURCE Severallastenteredsourcesearchstrings

NM_REFTXT Severallastenteredreferencetextsearchstrings

NM_GOTO SeverallastexpressionstofollowinDisassembler

NM_GOTODUMP SeverallastexpressionstofollowinDump

NM_TRPAUSE Severallastexpresionstopauseruntrace

NM_LABEL|NMHISTORY Severallastentereduser-definedlabels

NM_COMMENT|NMHISTORY Severallastentereduser-definedcomments

NM_BREAK|NMHISTORY Severallastenteredbreakpointconditions

NM_BREAKEXPR|NMHISTORY Severallastenteredbreakpointexpressions

NM_BREAKEXPL|NMHISTORY Severallastenteredbreakpointexplanations

Ifyouneeduniquenametypeforyourplugin,pleasecontacttheauthorof

OllyDbg.

Tofindnamebyitsaddress,OllyDbgusesbinarysearchoncontiguoussortedindexarray.Forthisreason,searchisextermelyfast,butaddingnewnamestothetablemaytakesignificanttime.Ifyouneedtoaddmultiplenamesatonce,useQuickinsertname.NamesaddedinthiswayareunaccessibleuntilyoucallMergequicknames.Asaruleofthumb,thismethodispreferrableifnumberofnamesexceeds10-15.

intInsertname(ulongaddr,inttype,char*name);

intQuickinsertname(ulongaddr,inttype,char*name);

voidMergequicknames(void);

voidDiscardquicknames(void);

intFindname(ulongaddr,inttype,char*name);

intDecodename(ulongaddr,inttype,char*name);

ulongFindnextname(char*name);

intFindlabel(ulongaddr,char*name);

voidDeletenamerange(ulongaddr0,ulongaddr1,inttype);

intFindlabelbyname(char*name,ulong*addr,ulongaddr0,ulongaddr1);

ulongFindimportbyname(char*name,ulongaddr0,ulongaddr1);

intDemanglename(char*name,inttype,char*undecorated);

intFindsymbolicname(ulongaddr,char*fname);

Insertname

Insertsneworreplacesexistingnameofgiventypeinthenametable.IfnameisNULLorempty,entryisdeleted.Returns0onsuccessand-1onerror.Note:donotcallthisfunctionbetweencallstoQuickinsertnameandMergequicknames!

intInsertname(ulongaddr,inttype,char*name);

Parameters:

addr-nameaddress;

type-nametype(NM_xxxforpredefinedtypes);

name-nametoinsert.IfnameisNULLorempty,entryisremovedfromthenametable.

Seealso:Quickinsertname,Mergequicknames,Discardquicknames,Findname,Deletenamerange

Quickinsertname

Insertsneworreplacesexistingnameofgiventypeinthenametable.NULLoremptynamesarenotallowed.Returns0onsuccessand-1onerror.NamesaddedbythisfunctionareunavailableuntilyoucallMergequicknames.Ifyouaddmultiplenames,QuickinsertnameismuchfasterthanInsertname.Note:donotcallInsertnamebetweencallstoQuickinsertnameandMergequicknames!

intQuickinsertname(ulongaddr,inttype,char*name);

Parameters:

addr-nameaddress;

name-nametoinsert.IfnameisNULLorempty,entryisremovedfromthenametable.

Seealso:Insertname,Mergequicknames,Discardquicknames,Findname,Deletenamerange

Mergequicknames

FunctionaddsnamespostedbyQuickinsertnametothenametable.NotethatpostednamesarenotavailableuntilyoucallMergequicknames.

voidMergequicknames(void);

Seealso:Quickinsertname,Insertname,Discardquicknames

Discardquicknames

DiscardsallnamespostedbyQuickinsertnameafterlastcalltoMergequicknames.

voidDiscardquicknames(void);

Seealso:Quickinsertname,Mergequicknames

Findname

Searchesfornamewithgivenaddressandtype.Returnslengthofthenameor0ifnameisabsent.Asasideeffect,setsglobalargumentsforFindnextname.

intFindname(ulongaddr,inttype,char*name);

Parameters:

addr-nameaddress;

name-pointertobufferoflengthatleastTEXTLENcharactersorNULL.Ifnameisfound,functioncopiesittothisbuffer.

Sealso:Findnextname,Decodename,Findlabel,Findlabelbyname,Findimportbyname

Decodename

Searchesfornamewithgivenaddressandtype.Ifnameisfound,scansitforcombinations<+XXXXXXXX>,whereXXXXXXXXisahexadecimalnumber,andsubstitutesthembysumofbaseandXXXXXXXXinhexadecimalformat.Returnslengthofresultingstringor0ifnameisabsent.OllyDbgusesthisfunctiontocorrectautomaticallygeneratedcommentsinrelocatablemodules.

intDecodename(ulongaddr,inttype,char*name);

Parameters:

addr-nameaddress;

name-pointertooutputbufferoflengthatleastTEXTLENcharacters.

Seealso:Findname,Findlabel,Findlabelbyname,Findimportbyname

Findnextname

SearchesfornamewithtypespecifiedinlastcalltoFindnameandaddressexceedingthatinFindnameorreturnedbylastcalltoFindnextname.Returnsaddressor0iftherearenomorecompatibleentries.IfnameisNULL,nameitselfisnotfetched.

ulongFindnextname(char*name);

Parameters:

name-pointertooutputbufferoflengthatleastTEXTLENcharacters.

Seealso:Findname,Findlabel,Findlabelbyname,Findimportbyname

Findlabel

SearchesfornameoftypesNM_LABEL,NM_EXPORT,NM_IMPORT,NM_LIBRARY,NM_CONST(inthelistedorder).Ifsomenameisfound,getsnameandreturnsitstype,otherwisereturnsNM_NONAME.

intFindlabel(ulongaddr,char*name);

Parameters:

addr-nameaddress;

name-pointertooutputbufferoflengthatleastTEXTLENcharactersorNULL.

Seealso:Findname,Findlabelbyname,Findimportbyname

Deletenamerange

Deletesallnamesofspecifiedtype(orallnamesiftypeisNM_ANYNAME)inthespecifiedrange.

voidDeletenamerange(ulongaddr0,ulongaddr1,inttype);

Parameters:

addr1-endofaddressrange(notincluded);

type-typeofnamestodelete(NM_ANYNAMEtodeleteallnamesintherange).

Seealso:Insertname,Quickinsertname

Findlabelbyname

SearchesfornameoftypesNM_LABEL,NM_EXPORT,NM_IMPORT,NM_LIBRARYorNM_CONSTinthespecifiedrange.Ifnameisfound,copiesitsaddressto*addrandreturnstypeoflabel,otherwisereturnsNM_NONAME.Attention,thisfunctionisveryslow,itsearchesnametablesequentially!

intFindlabelbyname(char*name,ulong*addr,ulongaddr0,ulongaddr1);

Parameters:

name-pointertooutputbufferoflengthatleastTEXTLENcharacters;

addr-pointertovariablethatreceivesaddressoffoundname;

Seealso:Findname,Findlabel,Findimportbyname

Findimportbyname

SearchesfornameoftypeNM_IMPORTinthespecifiedrange.Ifnameisfound,returnsitsaddress,otherwisereturns0.Ifnamecontainsnomoduleprefix,routinesearchesforimportnamewithanymoduleprefix.Attention,thisfunctionisveryslow,itsearchesnametablesequentially!

ulongFindimportbyname(char*name,ulongaddr0,ulongaddr1);

Parameters:

name-pointertooutputbufferoflengthatleastTEXTLENcharacters;

Seealso:Findname,Findlabel,Findlabelbyname

Findsymbolicname

Checksthatthereisasymbolicnameassociatedwithaddress.Returns0ifthereisnosymbolicname.Returns1ifnameexistsbuffnameisNULL.Extractsnametofnameandreturnsitssizeotherwise.

intFindsymbolicname(ulongaddr,char*fname);

Parameters:

addr-address;

fname-pointertooutputbufferoflengthatleastTEXTLENcharactersthatreceivesfoundname.

Seealso:Findname,Findlabel,Findlabelbyname

Disassemblyfunctions

DisasmisthemostimportantOllyDbgfunction,andoneofthemostcomplicated.Inversion1.06,itsCcodetogetherwithdeclarations,servicesubroutinesandtablesis4291lines(210Kbytes)long!AlmosteverypartofOllyDbgcallsDisasm,directlyorindirectly.

Disasmrequiresthatyousupplybinarycodeofthecommandtodisassemble.Readcommandallowsyoutoeasilyreadcommandfromthememoryofdebuggedprocess.

Twootherdisassemblyfunctions,DisassembleforwardandDisassembleback,allowwalkingthroughthebinarycode,commandbycommand.Notethat80x86commandshavevariablelength.Disassemblebackuseheuristicalmethodstoseparatecommandsandinsome(astoundinglyrare!)casesmayreturninvalidanswer.Toavoidrisksofinvalingbackwardwalking,useanalysisdata.

FunctionsIssuspiciousandIsfillingcandeterminewhethercommandispotentiallyinvalidorequivalenttoNOP.

ulongDisasm(char*src,ulongsrcsize,ulongsrcip,char*srcdec,t_disasm*disasm,intdisasmmode,ulongthreadid);

ulongReadcommand(ulongip,char*cmd);

ulongDisassembleback(char*block,ulongbase,ulongsize,ulongip,intn,intusedec);

ulongDisassembleforward(char*block,ulongbase,ulongsize,ulongip,intn,intusedec);

ulongFollowcall(ulongaddr);

intIssuspicious(char*cmd,ulongsize,ulongip,ulongthreadid,t_reg*preg,char*s);

intIsfilling(ulongoffset,char*data,ulongsize,ulongalign);

intIsprefix(intc);

t_disasm

Disasmusesthisstructuretoreportdisassemblyresults.Whichfieldsofthestructurearefilleddependsonthedisassemblingmode:

DISASM_SIZE Onlyerrorisvalid

DISASM_DATA Onlymembersoft_disasmmarkedwithasterisk(*)arevalid

DISASM_TRACE Onlymembersmarkedwithasterisk(*)andminus(-)arevalid

DISASM_FILE

Completedisassembly,butDisasmassumesthatregistersareundefinedanddoesnotdecodesymbolicnames.Membersmarkedwithminus(-)areinvalid

DISASM_CODECompletedisassembly,butDisasmassumesthatregistersareundefined.Membersmarkedwithminus(-)areinvalid

DISASM_ALL Completedisassembly.Membersmarkedwithminus(-)areinvalid

typedefstructt_disasm{//Resultsofdisassembling

ulongip;//(*)Instrucionpointer

chardump[TEXTLEN];//Hexadecimaldumpofthecommand

charresult[TEXTLEN];//Disassembledcommand

charcomment[TEXTLEN];//Briefcomment

charopinfo[3][TEXTLEN];//Commentstocommand'soperands

intcmdtype;//(*)OneofC_xxx

intmemtype;//(*)Typeofaddressedvariableinmemory

intnprefix;//(*)Numberofprefixes

intindexed;//Addresscontainsregister(s)

ulongjmpconst;//(*)Constantjumpaddress

ulongjmptable;//(*)Possibleaddressofswitchtable

ulongadrconst;//(*)Constantpartofaddress

ulongimmconst;//(*)Immediateconstant

intzeroconst;//(*)Whethercontainszeroconstant

intfixupoffset;//(*)Possibleoffsetof32-bitfixups

intfixupsize;//(*)Possibletotalsizeoffixupsor0

ulongjmpaddr;//Destinationofjump/call/return

intcondition;//0xFF:unconditional,0:false,1:true

interror;//(*)Errorwhiledisassemblingcommand

intwarnings;//(*)CombinationofDAW_xxx

intoptype[3];//Typeofoperand(extendedsetDEC_xxx)

intopsize[3];//Sizeofoperand,bytes

intopgood[3];//Whetheraddressanddatavalid

ulongopaddr[3];//Addressifmemory,indexifregister

ulongopdata[3];//Actualvalue(onlyintegeroperands)

t_operandop[3];//Fulldescriptionofoperand

ulongregdata[8];//Registersaftercommandisexecuted

intregstatus[8];//Statusofregisters,oneofRST_xxx

ulongaddrdata;//Tracedmemoryaddress

intaddrstatus;//Statusofaddrdata,oneofRST_xxx

ulongregstack[NREGSTACK];//Stacktracingbuffer

intrststatus[NREGSTACK];//Statusofstackitems

intnregstack;//Numberofitemsinstacktracebuffer

ulongreserved[29];//Reservedforplugincompatibility

}t_disasm;

Members:

ip-addressofthedisassembledcommand;

dump-ASCIIstring,formattedhexadecimaldumpofthecommand;

result-ASCIIstring,disassembledcommanditself;

comment-ASCIIstring,briefcommentthatappliestothewholecommand;

opinfo-arrayofASCIIstrings,commentstoindividualoperands(explicitorimplicit,likeESP,EBPandECXinMOVSB);

cmdtype-typeofthedisassembledcommand,oneofC_xxxpossiblyORedwithC_RAREtoindicatethatcommandisseldominordinaryWin32applications.CommandsoftypeC_MMXadditionallycontainsizeofMMXdatainthe3leastsignificantbits(0means8-byteoperands).Non-MMXcommandsmayhaveC_EXPLbitsetwhichmeansthatsomememoryoperandhassizewhichisnotconformwithstandard80x86rules;

memtype-typeofmemoryoperand,oneofDEC_xxx,orDEC_UNKNOWNifoperandisnon-standardorcommanddoesnotaccessmemory;

nprefix-numberofprefixesthatthiscommandcontains;

indexed-ifmemoryaddresscontainsindexregister,settoscale,otherwise0;

jmpconst-addressofjumpdestinationifthisaddressisaconstant,and0otherwise;

jmptable-ifindirectjumpcanbeinterpretedasswitch,baseaddressofswitchtableand0otherwise;

adrconst-constantpartofmemoryaddress;

immconst-immediateconstantor0ifcommandcontainsnoimmediateconstant.TheonlycommandthatcontainstwoimmediateconstantsisENTER.Disasmignoressecondconstantwhichisanyway0inmostcases;

zeroconst-nonzeroifcommandcontainsimmediatezeroconstant;

fixupoffset-possiblestartof32-bitfixupwithinthecommand,or0ifcommandcan'tcontainfixups;

fixupsize-possibletotalsizeoffixups(0,4or8).Ifcommandcontainsbothimmediateconstantandimmediateaddress,theyarealwaysadjacenton80x86processors;

jmpaddr-destinationofjump,callorreturn.Ifjumpaddresscontainsundefinedregister,jmpaddris0;

condition-whetherconditionincommandismet:0-conditionisfalse,1-true,-1-commandisunconditionalorEFLisundefined;

error-Disasmwasunabletodisassemblecommand(forexample,commanddoesnotexistorcrossesendofmemoryblock),oneofDAE_xxx;

warnings-commandissuspiciousormeaningless(forexample,farjumporMOVEAX,EAXprecededwithsegmentprefix),combinationofDAW_xxxbits;

optype-arrayofoperandtypes,DEC_xxxorDECR_xxx;

opsize-arrayofoperandsizesinbytes;

opgood-arrayofflagsindicatingopaddrandopdataarevalid;

opaddr-arraycontainingmemoryaddressesofmemoryoperandsandregisterindexesforregisteroperands.Validonlyifcorrespondingopgoodisset;

opdata-arrayofactualoperand'svalues(integeroperandsonly),validonlyif

correspondingopgoodisset;

op-fulldescriptionsofoperands.

Registertracingisstillrelativelyrawandisnotdescribed.

Disasm

Disassemblescommand,determinesitssizeanddecodesoperands.Returnssizeofthecommand.Disasmfunctionalitydependsontheselectedmodeandglobaldisassembling/analysisoptions.Seedescriptionoft_disasmformoredetails:

Mode ActionsDISASM_SIZE Fastestmode,onlycalculatescommandsizeDISASM_DATA Extractsmostimportantdata,notextualinformation

DISASM_TRACE Extractsmostimportantdataandtracescontentsofintegerregisters,notextualinformation

DISASM_FILEDisassemblescommandinassumptionthatregistersareundefinedandsymbolicnamesareinvalid.Usuallyusedtodisassemblecontentsoffile

DISASM_CODE Disassemblescommandassumingthatregistersareundefined

DISASM_ALL Completeandrelativelyslowdisassembly

ulongDisasm(char*src,ulongsrcsize,ulongsrcip,char*srcdec,t_disasm*disasm,intdisasmmode,ulongthreadid);

Parameters:

src-pointertobinarycommandthatmustbedisassembled;

srcsize-sizeofsrc.Lengthof80x86commandsislimitedtoMAXCMDSIZEbytes;

srcip-addressofthecommand;

srcdec-pointertodecodingdataproducedbyAnalyzerorNULLifdecodingdataisabsent.Youmustsupplysrcdecifyouwanttodecodeswitchtables,constantsandstrings;

disasm-pointertot_disasmstructurethatreceivesresultsofdisassembling;

disasmmode-disassemblymode,oneofDISASM_xxx.Seedesctiptionoft_disasmandtableabove;

threadid-identifierofthreadcontainingregisters,orNULLifregistersareundefined.

Seealso:Readmemory,Finddecode,t_disasm,MAXCMDSIZE

Disassembleback

Calculatesaddressofassemblerinstructionwhichisninstructions(maximally127)backfrominstructionatspecifiedaddress.Returnsaddressoffoundinstruction.Incaseoferror,itmaybelessthanninstructionsapart.

80x86commandshavevariablelength.Disassemblebackuseheuristicalmethodstoseparatecommandsandinsome(astoundinglyrare!)casesmayreturninvalidanswer.Toavoidrisksofinvalingbackwardwalking,orcorrectlywalkthroughconstantsandstrings,useresultsofcodeanalysis.

ulongDisassembleback(char*block,ulongbase,ulongsize,ulongip,intn,intusedec);

Parameters:

block-pointertocopyofcode.IfblockisNULL,Disassemblebackassumesmemoryofdebuggedprocessandifnecessaryreadsit;

base-addressoffirstbyteofcodeblock;

size-sizeofcodeblock;

ip-addressofcurrentinstruction;

n-numberofinstructionstowalkback;

usedec-flagindicatingwhetherDisassemblebackshouldtrytousedecodingdata.

Seealso:Disassembleforward,Followcall,Findmemory,Readmemory

Disassembleforward

Calculatesaddressofassemblerinstructionwhichisninstructionsforwardfrominstructionatspecifiedaddress.Ifcopyofcodeisnotsupplied,Disassembleforwardguaranteescorrectresultsupton=127(typically300).Returnsaddressoffoundinstruction.Incaseoferror,itmaybelessthanninstructionsapart.

Ifyouwanttocorrectlywalkthroughconstantsandstrings,useresultsofcodeanalysis.

ulongDisassembleforward(char*block,ulongbase,ulongsize,ulongip,intn,intusedec);

Parameters:

block-pointertocopyofcode.IfblockisNULL,Disassembleforwardassumesmemoryofdebuggedprocessandifnecessaryreadsit;

base-addressoffirstbyteofcodeblock;

size-sizeofcodeblock;

ip-addressofcurrentinstruction;

n-numberofinstructionstowalkforward;

usedec-flagindicatingwhetherDisassembleforwardshouldtrytousedecodingdata.

Seealso:Disassembleback,Followcall,Findmemory,Readmemory

Followcall

Followssequenceofjumps(directorindirect)andWin95thunksthatstartsatspecifiedaddress.Stopsif:

-nextcommandisneitherjumpnorthunk,or

-nextcommandisexportedentryindifefrentmodule,or

-lengthofsequenceexceeds10jumps.

Returnsaddressoffinaldestination,or0onerror.ParameteraddrisusuallythedestinationofCALLcommand,hencethename.Asanyaccesstothedebuggee'smemorytakessignificanttime,thisfunctionmaybeslow.

ulongFollowcall(ulongaddr);

Parameters:

addr-addressoffirstcommandinjumpchain.

Seealso:Disassembleforward,Disassembleback,Disasm

Issuspicious

Checkswhethercommandissomehowsuspicious.Returns-1onerror,0ifcommandisnotsuspiciousand1ifcommandissuspicious.Useonlywithprograminmemory,donotapplytofile!Commandisconsideredsuspiciouswhen:

·thiscommandiserroneousorunknown,or

·itispotentiallyinvalidaccordingtoactiveanalysisoptions,or

·itsetssingle-steptrap,or

·itaccessesmemoryoperandinunusedpartofstack(i.e.addr>ESP),or

·itiscommandCLI,or

·memoryoperandcontainsINT3breakpointsetbyOllyDbg.

intIssuspicious(char*cmd,ulongsize,ulongip,ulongthreadid,t_reg*preg,char*comment);

Parameters:

cmd-pointertothebinarycommandcode;

size-sizeofcmdinbytes;

ip-addressofthecommandinthememoryofdebuggedprocess;

threadid-identifierofthethreadinwhichcontextthiscommandwillbeexecuted;

preg-pointertoregistersatthemomentofexecution;

comment-buffer,atleastTEXTLENbyteslong,thatreceivesexplanationwhythiscommandissuspicious,orNULL.

Seealso:Disasm,Isfilling,Isprefix,Readcommand

Isfilling

Functioncheckswhethercommandwhichbinarycodestartsatdata[offset]isavalidfillingcommand(usuallysomekindofNOP)usedtoaligncodetoaspecifiedborder.Returnslengthofcommandifthisisrecognizedasfillingand0otherwise.Checksinclude:

·INT3

·XCHGRA,RA

·MOVRA,RA

·LEARA,[RA](withorwithoutSIBbyte)

·LEARA,[RA+00000000]

Thislistisfarfromcompletenessbutincludescommandsmostfrequentlyusedasfillingbyactualcompilers.

intIsfilling(ulongoffset,char*data,ulongsize,ulongalign);

Parameters:

offset-offsetofbinarycommandindata;

data-buffercontainingcopyofexecutablecode;

size-sizeofvalidcodeindata(ifsize<offset+sizeoftestedcommand,functionreturns0);

align-expectedcodealignment,mustbeeitherpowerof2(1,2,4,8...)or0thatmeansnoalignment.

Seealso:Disasm,Issuspicious,Isprefix,Readcommand

Isprefix

Veryquickandstraightforwardfunction,returns1ifbytecisa80x86commandprefix(ES:,CS:,SS:,DS:,FS:,GS:,DATASIZE,ADDRSIZE,LOCK,REPNE,REP)and0otherwise.Attention,itdoesn'tdistinguishthecaseswhenbyteispartoftheSSE/SSE2command!

intIsprefix(intc);

Parameters:

c-bytetoverify.

Seealso:Issuspicious,Isfilling

Readcommand

Readscommandfromthememoryofdebuggedprocessandrestoredbreakpoints.Returnslengthofthereadcode(atmostMAXCMDSIZEbytes)or0ifmemorycan'tberead.

Note:Anyaccesstothememoryindifferentprocessisextremelytime-expensive.AsinmanycasesdifferentpartsofOllyDbgaccesssamecommandseveraltimes,Readcommandmaintainssmall1-commandcachesignificantlyimprovesthewholesaveproductivityofOllyDbg.Ifyouneedtoaccessseveralcompactlyplacedcommands,Readmemoryisusuallymuchfaster.

ulongReadcommand(ulongip,char*cmd);

Parameters:

ip-addressofthecommandinthememoryspaceofdebuggedprocess.Ifipis0,functioninvalidatescacheandreturns0;

cmd-bufferoflengthatleastMAXCMDSIZEbytesthatreceivescommand.

Seealso:Disasm,Readmemory

Assemblyfunctions

intAssemble(char*cmd,ulongip,t_asmmodel*model,intattempt,intconstsize,char*errtext);

intCheckcondition(intcode,ulongflags);

Assemble

FunctionAssemble,asexpected,convertscommandinASCIIformtobinary32-bitcode.ItsharescommandtablewithDisasm,soifsomecommandcanbedisassembled,itcanbeassembledbacktoo,withoneexception:Assembledoesn'tsupport16-bitaddresses.Somecommandshavemorethanoneencoding.BycallingAssemblewithparameterattempt=0,1...andconstsize=0,1,2,3onecangetalternativevariantsandthenselecttheshortestpossibleform(thisishowOllyDbgimplementsassembling).However,onlyoneaddressformisgeneratedineachcase([EAX*2]butnot[EAX+EAX];[EBX+EAX]butnot[EAX+EBX];[EAX]willnotuseSIBbyte;noDS:prefixandsoon).

Assemblecompilesimprecisecommands(where,forexample,R32replacesanygeneral-purpose32-bitregister).Thisallowstogenerateimprecisesearchpatterns,wheremaskcontainszerosatthepositionoccupiedincodebyregister).Returnsnumberofbytesinassembledcodeornon-positivenumberincaseofdetectederrororwhenvariantselectedbycombinationofattemptandconstsizedoesn'texist.Thisnumberisthenegativepositionoferrorintheinputcommand.

intAssemble(char*cmd,ulongip,t_asmmodel*model,intattempt,intconstsize,char*errtext);

Parameters:

cmd-pointertozero-terminatedASCIIcommand;

ip-addressofthegeneratedbinarycodeinmemory;

model-pointertostructurethatreceivesmachinecodeandmask;

attempt-indexofalternativeverisonofthecommand.CallAssemblewithattempt=0,1,2...toobtainallpossibleversionsofthecommand.StopthissequencewhenAssemblereportserror;

constsize-requestedsizeofaddressconstantandimmediatedata.CallAssemblewithconstsize=0,1,2,3toobtainallpossiblevariantsoftheversionselectedbyattempt;

errtext-pointertotextbufferoflengthatleastTEXTLENthatreceivesdescriptionofdetectederror.

Seealso:Disasm

Checkcondition

Checkswhether80x86flagsmeetconditionsetinthecommand.Returns1ifconditionismetand0ifnot.

intCheckcondition(intcode,ulongflags);

Parameters:

code-firstbyteofconditionalcommand;

flags-contentsofregisterEFL.

Watchandexpressionfunctions

Forsomeobscurereasons,watchesinOllyDbgare1-based.Thatmeansthattoaccessthefirstavailablewatch,youmustsetindexinwatchfunctionsto1.Internally,OllyDbgkeepswatchexpressionsasnamesoftypeNM_WATCH,wherefirstwatchhasaddress1,next-address2andsoon.Accesstowatchexpressionsusingnamefunctionsisnotrecommended,directdeletionorinsertionofnewwatcheswillbringwatchwindowoutofsynchronization.Instead,usefunctionslistedbelow.

intInsertwatch(intindexone,char*text);

intDeletewatch(intindexone);

intGetwatch(intindexone,char*text);

intExpression(t_result*result,char*expression,inta,intb,char*data,ulongdatabase,ulongdatasize,ulongthreadid);

Insertwatch

Insertsnewwatchbeforethewatchwithspecified1-basedindexandupdateswatchwindow.Returnsnumberofwatchesafternewwatchisinserted,or-1onerror.

intInsertwatch(intindexone,char*text);

Parameters:

indexone-1-basedindexofexistingwatch.Ifthisindexexceedstotalnumberofexistingwatches,newwatchwillbeaddedtotheendofthewatchtable;

text-newwatchexpressiontoinsert.

Seealso:Deletewatch,Getwatch

Deletewatch

Deleteswatchwithspecified1-basedindexandupdateswatchwindow.Returnsnumberofremainingwatches,or-1onerror.

intDeletewatch(intindexone);

Parameters:

indexone-1-basedindexofexistingwatch.

Seealso:Insertwatch,Getwatch

Getwatch

Getscurrentexpressionofwatchwithgiven1-basedindex.Returnslengthofexpressionor0incaseoferror.

intGetwatch(intindexone,char*text);

Parameters:

indexone-1-basedindexofexistingwatchtoretrieve;

text-bufferoflengthatleastTEXTLENbytesthatreceiveswatchexpression.

Seealso:Insertwatch,Deletewatch

Expression

Expressioncalculatesvalueand,ifavailable,addressofarithmeticalexpression.Expressioncanincludeconstants,registers,memoryaddressesandtosomelimitedextentsymbolicnames,allstandardarithmeticaloperations,parenthesesandtwoparameters%Aand%B.Youcanfindbothintuitiveandformaldescriptionsofallowedexpressionsinfileollydbg.hlp.Onsuccess,Expressionfillsinstructuret_resultandreturnslengthofvalidexpression.Onerror(result->type==DEC_UNKNOWN)itreturnspositionoferrorinexpressionstringanderrormessageinresult->value.

Noticethatstartingfromversion1.08,Expression()doesn'treporterror"Extracharactersonline".Unrecognizedsymbolsremainunprocessed.

intExpression(t_result*result,char*expression,inta,intb,char*data,ulongdatabase,ulongdatasize,ulongthreadid);

Parameters:

result-pointertostructuret_resultthatreceivesresultsofevaluation;

expression-inputstringcontainingexpressiontoevaluate;

a-valueofparameter%A;

b-valueofparameter%B;

data-optionalpointertothecopyofmemoryofdebuggedprocess.IfdataisnotNULLandexpressionaccessesvariableinmemoryinrangefromdatabasetodatabase+datasize,Expressiontakescontentsofmemoryfromdata,otherwiseitreadsmemoryofdebuggedprocess.Thissparestime,especiallyifyouestimatesmultipleexpressions.

database-addressofdatainmemoryspaceofdebuggedprocess;

datasize-sizeofdata;

threadid-identifierofthreadwhoseregisterswillbeusedinevaluationofexpression.Ifthreadidis0andexpressionincludesregister,Expressionreports

erorr.

Seealso:Checkcondition,t_result

t_result

Typeofstructurethatcontainsresultofexpressionevaluation.

typedefstructt_result{//Resultofexpression'sevaluation

inttype;//Typeofexpression,DEC(R)_xxx

intdtype;//Typeofdata,DEC_xxx

union{

chardata[10];//Binaryformofexpression'svalue

ulongu;//Valueasunsignedinteger

longl;//Valueassignedinteger

longdoublef;};//Valueas80-bitfloat

union{

charvalue[TEXTLEN];//ASCIIformofexpression'svalue

wchar_twvalue[TEXTLEN/2];};//UNICODEformofexpression'svalue

ulonglvaddr;//AddressorindexoflvalueorNULL

}t_result;

Members:

type-exacttypeofexpression,oneofDEC_xxxorDECR_xxxpossiblyORedwithDEC_SIGNEDifresultshouldbeinterpretedassignednumber.typeisDEC_UNKNOWNifexpressionisinvalid.Expressionislvalue(canbeassignedto)ifeithertypeisDEC_xxxandlvaddrisnot0,oriftypeisoneofDECR_xxx.Allpossibletypesarelistedinthetablebelow:

type&DECR_TYPEMASK Meaning

DEC_UNKNOWN ErrorinexpressionDEC_BYTE ByteDEC_WORD ShortintegerDEC_DWORD LongintegerDEC_FLOAT4 32-bitfloatDEC_FWORD 48-bitdescriptororlongpointerDEC_FLOAT8 64-bitdoubleDEC_QWORD QuadwordDEC_FLOAT10 80-bitlongdoubleDEC_STRING Zero-terminatedASCIIstringDEC_UNICODE Zero-terminatedUNICODEstringDECR_BYTE ByteregisterDECR_WORD ShortintegerregisterDECR_DWORD LongintegerregisterDECR_QWORD MMXregisterDECR_FLOAT10 Floating-pointregisterDECR_SEG Segmentregister

dtype-simplifiedtypeofdata,possiblyORedwithDEC_SIGNED,describesvaluestoredint_result.data.IfbitDEC_SIGNEDisset,resultmustbeinterpretedassigned,otherwiseasunsigned:

dtype Interpretationoft_result.data

DEC_UNKNOWN Errorinexpressionorresultdoesn'tfitintodata

DEC_DWORD 32-bitunsignedintegerint_result.u

DEC_DWORD|DEC_SIGNED 32-bitsignedintegerstoredint_result.l

DEC_QWORD 64-bitintegerindata[0..7]

DEC_FLOAT10 80-bitlongdoublestoredint_result.f

data,u,l,f-resultofexpressionifthiscanberepresentedasintegerorfloat.

Whichfieldtoselectdependsondtype;

value-resultofexpressionoftypeDEC_STRING(truncatedtoTEXTLENcharacters)orerrormessageiftypeisDEC_UNKNOWN;

wvalue-resultofexpressionoftypeDEC_UNICODE(truncatedtoTEXTLEN/2characters);

lvaddr-addressofexpressioniftypeisoneofDEC_xxx,orindexofregisteriftypeisDECR_xxx.

Seealso:Expression

Threadfunctions

OllyDbgkeepslistofactivethreadinasorteddataconsistingofelementsoftypet_thread.YoucanreceivepointertotableofthreadsbycallingPlugingetvalue(VAL_THREADS)andcastingresultto(t_table*).Ifyouknowthread'sidentifier,Findthreadwillreturnpointertothreaddescriptor.Plugingetvalue(VAL_MAINTHREADID)givesidentifierofmainthreadofdebuggedprocess.

OllyDbgfunctionsusethreadidentifiers,butsomeWindowsfunctionsrequirehandles.Followingcodeconvertsidentifiertohandle:

t_thread*pthread;

HANDLEhthread;

pthread=Findthread(threadid);

if(pthread!=NULL)

hthread=pthread->handle;

hthread=NULL;

NotethatafterapplicationstartedandbeforeOllyDbgreceivedCREATE_PROCESS_DEBUG_EVENTevent,thread'shandleisunknown.

t_thread*Findthread(ulongthreadid);

intDecodethreadname(char*s,ulongthreadid,intmode);

ulongGetcputhreadid(void);

t_thread

Typeofthreaddescriptor.

typedefstructt_thread{//Informationaboutactivethreads

ulongthreadid;//Threadidentifier

ulongdummy;//Always1

ulongtype;//Serviceinformation,TY_xxx

HANDLEthread;//Threadhandle

ulongdatablock;//Per-threaddatablock

ulongentry;//Threadentrypoint

ulongstacktop;//WorkingvariableofListmemory()

ulongstackbottom;//WorkingvariableofListmemory()

CONTEXTcontext;//Actualcontextofthethread

t_regreg;//Actualcontentsofregisters

intregvalid;//Whetherregisvalid

t_regoldreg;//Previouscontentsofregisters

intoldregvalid;//Whetheroldregisvalid

intsuspendcount;//Suspensioncount(maybenegative)

longusertime;//Timeinusermode,1/10thms,or-1

longsystime;//Timeinsystemmode,1/10thms,or-1

ulongreserved[16];//Reservedforfuturecompatibility

}t_thread;

Members:

threadid-threadidentifier;

dummy-sizeofthreadinspaceofthreadidentifiers,mustbe1.SeeSorteddatafunctionsforexplanation;

type-typeofthread,combinationofbitsTY_xxx.IfbitTY_MAINisset,thisisthemainthread;

thread-threadhandle.AfterapplicationstartedandbeforeOllyDbgreceivedCREATE_PROCESS_DEBUG_EVENTevent,thread'shandleisunavailable;

datablock-baseaddressofper-threaddatablock;

entry-addressofthreadentrypoint;

context-actualcontextofthethread.Donotmodifycontextdirectly,oryourisktocrashdebuggedapplication!

reg-excerptfromcontextthatcontainsCPUregisterssortedinanaturalway.Validonlywhenregvalidisnon-zero.Ifyouneedtomodifyregister,stopapplicationifnecessary,checkthatregvalidisnon-zero,applyyourchangesandsetreg.modifiedto1.DonotchangesinglestepflagordebuggingregisterDR6;

regvalid-flagindicatingthatregcontainsactualcontentsofthread'sregisters;

oldreg-previouscontentsofregisters,don'tmodify.Ifreg.modifiedbyuseris0,thisisacopyofregistersonapreviousstep,otherwisecopyoforiginalregisters;

oldregvalid-flagindicatingthatcontentsofoldregisvalid;

suspendcount-numberoftimesthisthreadwassuspendedbyOllyDbg.MaybenegativeincasewhenthreadwassuspendedbyuserorprogramandresumedbyOllyDbg.Donotmodifydirectly!

usertime-timethethreadspentinusermode,in100-microsecondunits,or-1ifunavailable;

systime-timethethreadspentinsystemmode,in100-microsecondunits,or-1ifunavailable;

reserved-reservedforfutureuseexclusivelybyOllyDbg.

Seealso:Findthread,Plugingetvalue

Findthread

Giventhread'sidentifier,returnspointertodescriptorofspecifiedthread,orNULLifthreaddoesnotexist.

t_thread*Findthread(ulongthreadid);

Parameters:

threadid-identifier(nothandle!)oftherequestedthread.

Seealso:Getcputhreadid,t_thread

Decodethreadname

DecodesnameofthreadwithspecifiedthreadidentifiertoASCIIstring,like"Mainthread"or"thread12345678".Returnslengthofnameor0onerror.

intDecodethreadname(char*s,ulongthreadid,intmode);

Parameters:

s-pointertobufferoflengthatleastTEXTLENbytesthatreceivesdecodedname;

threadid-threadidentifier;

mode-combinationofbitsADC_xxxthattellhowtodecodenameofthread:

ADC_VALID decodenameofthreadonlyifthreadidisavalidthreadidentifier

ADC_SYMBOL decodenameofthreadonlyifithassymbolicname

ADC_UPPERCASE forcefirstcharacterofnametobeinuppercase

ADC_WIDEFORM includeword"thread"intodecodedname

Getcputhreadid

ReturnsidentifierofthreadthatiscurrentlyselectedinCPUwindow.

Memoryfunctions

OllyDbgkeepslistofmemoryblocksallocatedbydebuggedapplicationinatableofsorteddataconsistingofelementsoftypet_memory.YoucanreceivepointertomemorytablebycallingPlugingetvalue(VAL_MEMORY)andcastingresultto(t_table*).

t_memory*Findmemory(ulongaddr);

voidHavecopyofmemory(char*copy,ulongbase,ulongsize);

ulongReadmemory(void*buf,ulongaddr,ulongsize,intmode);

ulongWritememory(void*buf,ulongaddr,ulongsize,intmode);

intListmemory(void);

t_memory

Typeofmemorydescriptor,donotmodifydirectly!

typedefstructt_memory{//Memoryblockdescriptor

ulongbase;//Baseaddressofmemoryblock

ulongsize;//Sizeofblock

ulongowner;//Addressofownerofthememory

ulonginitaccess;//Initialread/writeaccess

ulongaccess;//Actualstatusandread/writeaccess

ulongthreadid;//Blockbelongstothisthreador0

charsect[SHORTLEN];//Nameofmodulesection

char*copy;//CopyusedinCPUwindoworNULL

}t_memory;

Members:

base-baseaddressofmemoryblockinthememoryspaceofdebuggedprocess;

size-sizeofmemoryblock;

type-memorycharacteristics,combinationofbitsTY_xxx:

TY_CODE Memoryblockcontainsimageofcodesection

TY_DATA ContainsimageofdatasectionTY_IMPDATA Includesimportdata

TY_EXPDATA IncludesexportdataTY_RSRC ContainsresourcesTY_RELOC Includesrelocationdata

TY_STACK Containsstackofthreadwithidentifierthreadid

TY_THREAD Containsdatablockofthreadwithidentifierthreadid

TY_HEADER ContainsCOFFheaderTY_DEFHEAP ContainsdefaultheapTY_HEAP Containsnon-defaultheapTY_SFX Containsself-extractorTY_GUARDED NTonly:guardedmemoryblock

owner-addressofmemoryblockthatownsthisblock;

initaccess-typeofallowedmemoryaccesswhenblockwasallocated,oneofPAGE_xxx(seedescriptionofWindowsfunctionVirtualQueryExfordetails);

access-actualtypeofallowedmemoryaccess,oneofPAGE_xxx

threadid-ifmemorycontainsstackofthreaddatablock,identifierofowningthread,otherwiseundefined;

sect-nameofsection(notnecessarilynull-terinated!)ifblockisanimageofsectioninexecutablefile,otherwiseemptystring;

copy-ifmemoryblockwasbackupedinCPUwindow,pointertobackupcopy,orNULLotherwise;

Seealso:Findmemory

Findmemory

Givenaddressofmemory,returnspointertodescriptorofmemoryblockthatthisaddressbelongsto,orNULLifthereisnoallocatedmemory.

t_memory*Findmemory(ulongaddr);

Parameters:

addr-addressofmemoryinthememoryspaceofdebuggedapplication.

Seealso:t_memory

Havecopyofmemory

Optimizesaccesstomemoryofdebuggedprocess.FunctionReadmemoryisslow.Ifyouexpectmultiplereadsfromthesameblock,readrequestedpieceofmemorytosomeinternalbufferandreportittoOllyDbg.AllsubsequentcallstoReadmemorywill,wheneverpossible,usethiscopy.Don'tforgettocallHavecopyofmemory(NULL,0,0)whenyounolongerneedthiscopy,orOllyDbgwillcrash!NotethatWritememorywillnotupdatethiscopy.

voidHavecopyofmemory(char*copy,ulongbase,ulongsize);

Parameters:

copy-pointertocopyofmemoryofdebuggedprocess;

base-baseaddressofmemory;

size-sizeofmemory.

Seealso:Readmemory

Readmemory

ReadsmemoryofdebuggedprocessoptionallyremovingINT3breakpoints.Youcanreadmemory"onthefly":ifnecessary,Readmemorytemporailypausesdebuggedapplicationandenablesreadaccess.Returnssizeofmemoryactuallyread.Currently,thisiseithersizeor0ifmemorycannotbereadatonce.

Importantnote:Anyaccesstothememoryofdebuggedapplicationistime-consuming.Tooptimizeaccess,consideruseofHavecopyofmemory.

ulongReadmemory(void*buf,ulongaddr,ulongsize,intmode);

Parameters:

buf-pointertobufferofsizeatleastsizethatreceivescopyofmemory;

addr-addressofmemoryinthememoryspaceofdebuggedapplication;

size-sizeofrequestedmemoryblock;

mode-modeofoperation,combinationoffollowingbits:

MM_RESTORE RestoreINT3breakpointsMM_SILENT Onerror,don'tdisplayerrormessagebox

NotethatheaderdeclaresMM_RESILENTasacombinationof(MM_RESTORE|MM_SILENT).

Seealso:Writememory,Havecopyofmemory

Writememory

Modifiesmemoryofdebuggedprocess,optionallyremovingINT3breakpoints,broadcastingmemorychangesandremovinganalysisdata.Returnssizeofactuallymodifiedmemory.Currently,thisiseithersizeor0ifmemorycannotbewrittenatonce.

ulongWritememory(void*buf,ulongaddr,ulongsize,intmode);

Parameters:

buf-pointertobufferwithnewcontentsofmemory;

addr-addressofmemoryinthememoryspaceofdebuggedapplication;

size-sizeofnewcontents;

mode-modeofoperation,combinationoffollowingbits:

MM_RESTORE RemoveINT3breakpointsinthemodifiedareaandbroadcastmemorychanges

MM_DELANALWipeoffanalysisinthemodifiedareaMM_SILENT Onerror,don'tdisplayerrormessagebox

Seealso:Readmemory

Listmemory

Functionactualizeslistofmemoryblocksand(incaseifWindows95)listofheapsallocatedbyDebuggee.Ifmemoryand/orheapwindowsareopen,alsoupdateswindows.Returns0iftablesareactualizedand-1ifsomeorallofentriesmaybeinvalid.

Asthisoperationistime-consuming,OllyDbgusuallyupdatesmemorytablesonlyifapplicationispaused.Ifpluginaccessesmemorytables"onthefly",itmayneedtocallthisfunction.Notethatreadingorwritingtothememorydoesnotrequireactualizationofmemorytables.

intListmemory(void);

Modulefunctions

Moduleisanexecutablefile(ususllyEXEorDLL)loadedintomemory.OllyDbgkeepslistofloadedmodulesinatableofsorteddataconsistingofelementsoftypet_module.YoucanreceivepointertotableofmodulesbycallingPlugingetvalue(VAL_MODULES)andcastingresultto(t_table*).

t_module*Findmodule(ulongaddr);

t_fixup*Findfixup(t_module*pmod,ulongaddr);

char*Finddecode(ulongaddr,ulong*psize);

ulongFindfileoffset(t_module*pmod,ulongaddr);

intAnalysecode(t_module*pmod);

t_module

Typeofmoduledescriptor.Thisisaverysensitivestructure,donotmodifydirectly!

typedefstructt_module{//Executablemoduledescriptor

ulongbase;//Baseaddressofmodule

ulongsize;//Sizeoccupiedbymodule

ulongcodebase;//Baseaddressofmodulecodeblock

ulongcodesize;//Sizeofmodulecodeblock

ulongresbase;//Baseaddressofresources

ulongressize;//Sizeofresources

t_stringtable*stringtable;//PointerstostringresourcesorNULL

intnstringtable;//Actualnumberofusedstringtable

intmaxstringtable;//Actualnumberofallocatedstringtable

ulongentry;//Addressof<ModuleEntryPoint>orNULL

ulongdatabase;//Baseaddressofmoduledatablock

ulongidatatable;//Baseaddressofimportdatatable

ulongidatabase;//Baseaddressofimportdatablock

ulongedatatable;//Baseaddressofexportdatatable

ulongedatasize;//Sizeofexportdatatable

ulongreloctable;//Baseaddressofrelocationtable

ulongrelocsize;//Sizeofrelocationtable

charname[SHORTLEN];//Shortnameofthemodule

charpath[MAXPATH];//Fullnameofthemodule

intnsect;//Numberofsectionsinthemodule

IMAGE_SECTION_HEADER*sect;//Copyofsectionheadersfromfile

ulongheadersize;//Totalsizeofheadersinexecutable

ulongfixupbase;//Baseofimageinexecutablefile

intnfixup;//Numberoffixupsinexecutable

t_fixup*fixup;//ExtractedfixupsorNULL

char*codedec;//DecodedcodefeaturesorNULL

ulongcodecrc;//CodeCRCforactualdecoding

char*hittrace;//HittracingdataorNULL

char*hittracecopy;//CopyofINT3-substitutedcode

char*datadec;//DecodeddatafeaturesorNULL

t_tablenamelist;//Listofmodulenames

t_symvar*symvar;//Descriptionsofsymbolicvariables

intnsymvar;//Actualnumberofelementsinsymvar

intmaxsymvar;//Maximalnumberofelementsinsymvar

char*globaltypes;//Globaltypesfromdebuginfo

ulongmainentry;//AddressofWinMain()etc.indbgdata

ulongrealsfxentry;//EntryofpackedcodeorNULL

intupdatenamelist;//Requesttoupdatenamelist

ulongorigcodesize;//Originalsizeofmodulecodeblock

ulongsfxbase;//BaseofmemoryblockwithSFX

ulongsfxsize;//SizeofmemoryblockwithSFX

intissystemdll;//WhethersystemDLL

intprocessed;//0:notprocessed,1:good,-1:bad

intdbghelpsym;//1:symbolsloadedbydbghelp.dll

charversion[NVERS];//Versionofexecutablefile

t_jdest*jddata;//Recognizedjumpswithinthemodule

intnjddata;//Numberofrecognizedjumps

}t_module;

Members(membersthatintendedstriclyforinternalusearenotexplained):

base-baseaddressofmoduleinthememoryspaceofdebuggedprocess;

size-totalsizeoccupiedbymodule,notnecessarilycontiguousmemory;

type-serviceinformation,combinationofbitsTY_xxx;

codebase-baseaddressofexecutablecode,asstaysinCOFFheader.Insomecases,OllyDbgmaycorrectdefinitelyinvalidcodebase;

codesize-sizeofexecutablecode,asstaysinCOFFheader.Insomecases,OllyDbgmaycorrectdefinitelyinvalidcodesize;

resbase-baseaddressofresources;

ressize-sizeofresources;

entry-addressofmodule'sentrypoint,asstaysinCOFFheader;

database-baseaddressofmodule'sdatablock.OllyDbgusesheuristicstolocatedata;

idatatable-baseaddressofimportdatatable,asstaysinCOFFheader;

idatabase-baseaddressofimportdatablock,asstaysinCOFFheader;

edatatable-baseaddressofexportdatatable,asstaysinCOFFheader;

edatasize-sizeofexportdatatable,asstaysinCOFFheader;

reloctable-baseaddressofrelocationtable,asstaysinCOFFheader;

relocsize-sizeofrelocationtable,asstaysinCOFFheader;

name-shortnameofthemodule,notnecessarilyNULL-terminated;

path-fullnameofexecutablefile;

nsect-numberofsectionsinthemodule;

sect-pointertocopyofsectionheadersfromtheCOFFheader;

headersize-totalsizeofheadersinexecutablefile;

fixupbase-baseofimageinexecutablefile;

nfixup-numberoffixupsinexecutablefile;

fixup-pointertolistofextractedfixupsorNULL;

mainentry-addressofWinMainorDllEntryPointfromdebuggingdataor0;

realsfxentry-realentryofunpackedSFXcodeor0;

updatenamelist-requesttoupdatenamelist;

issystemdll-1ifmoduleissystemDLL(i.e.DLLresidinginWindows'systemdirectory)and0otherwise;

dbghelpsym-1ifdebugginginformationinoneofMicrosoftformatsisavailableand0otherwise;

version-zero-terminatedASCIIstringcontainingversionofexecutablefile,NVERS-1byteslong;

Seealso:Findmodule,Findfileoffset

Findmodule

Givenaddressofmemoryindebuggedapplication,returnspointertomoduledescriptorthatthisaddressbelongsto,orNULLifaddressisoutsideanymodule.

t_module*Findmodule(ulongaddr);

Parameters:

addr-addressofmemoryinthememoryspaceofdebuggedapplication.

Seealso:Findfixup,Finddecode,Findfileoffset,t_module

Findfixup

Ifsuppliedaddressbelongstosomemodule,functioncheckswhethertherearefixupsincludingorexceedingthisaddressandreturnspointertofirstsuchfixup.Otherwise,itreturnsNULL.Fixupsaresortedinascendingorderandterminatedbyelement(0,0),socallingproceduremayusereturnedpointertowalkthroughallsubsequentfixups.

t_fixup*Findfixup(t_module*pmod,ulongaddr);

Parameters:

pmod-optionalpointertomoduledescriptor.IfpmodisNULL,Findfixuplooksformoduledescriptorbyitself;

addr-addressinmemoryspaceofdebuggedapplicationwheresearchforfixupswillstart.

Seealso:Findmodule,Finddecode,Findfileoffset,t_module

Analysecode

Analyzesexecutablecodeofspecifiedmodule.Amongothertasks,analysisincludes:

·Recognitionofcommandsandembeddeddata;

·Recognitionof1-and2-stageswitches;

·Recognitionofproceduresandloops;

·Decodingofargumentsofknownfunctions;

·Predictionofcontentsofregisters;

·Formingofcalltree.

Oneveryimportantassumption:codeisvalidandisnotcounterfeit:knowinghowthisanalysisworks,onemaywriteaprogramthatwillbeanalyzedtotallyincorrectly.Functionishighlyheuristical,soneverassumethatresultsare100%reliable.Returns0onsuccessand-1onerror.

intAnalysecode(t_module*pmod);

Parameters:

pmod-pointertomoduledescriptor.

Finddecode

Searchesfordecodingdatathatstartsonspecifiedaddress.Onsuccess,sets*psizetosizeoflocateddataandreturnspointertodecodinginformation.Ifthereisnodecodinginformation,sets*psizeto0andreturnsNULL.Foreachbyteofanalysedcode,correspondingbyteofdecodingdatacontainscombinationoftype,procedureandanalysisfields:

Typefield,useDEC_TYPEMASKtoextractitfromdecodingdata:

DEC_UNKNOWN UnknowntypeDEC_BYTE ByteDEC_WORD Firstbyteof16-bitintegerDEC_NEXTDATA SubsequentbyteofdataDEC_DWORD Firstbyteof32-bitintegerDEC_FLOAT4 Firstbyteof32-bitfloatDEC_FWORD FirstbyteofdescriptororlongpointerDEC_FLOAT8 Firstbyteof64-bitdoubleDEC_QWORD Firstbyteof64-bitintegerDEC_FLOAT10 Firstbyteof80-bitlongdoubleDEC_TBYTE Firstbyteof10-byteBCDintegerDEC_STRING FirstbyteofASCIIstringDEC_UNICODE FirstbyteofUNICODEstringDEC_3DNOW Firstbyteof3DNow!operandDEC_SSE FirstbyteofSSEoperandDEC_BYTESW Bytewhichisasecond-levelswitchindexDEC_NEXTCODE SubsequentbyteofcommandDEC_COMMAND Firstbyteofcommand

DEC_JMPDEST Firstbyteofcommandthatisjumpdestination

DEC_CALLDEST Firstbyteofcommandthatiscall(andmaybejump)destination

Procedurefield,useDEC_PROCMASKtoextractitfromdecodingdata:

DEC_PROC StartofprocedureDEC_PBODY BodyofprocedureDEC_PEND Endofprocedure

BitDEC_CHECKED,ifset,reportsthatbytewasanalyzed.

char*Finddecode(ulongaddr,ulong*psize);

Parameters:

addr-addressofthefirstbyteinthememoryspaceofdebuggedprocessforwhichdecodinginformationisrequested;

psize-pointertovariablethatwillreceivesizeoffounddecodingdataorNULL.

Seealso:Findmodule,Findfixup,Findfileoffset

Findfileoffset

Convertsaddressbelongingtosomemoduleintooffsetinexecutablefile.Returnsoffsetor0ifoffsetcannotbecalculated(forexample,addressbelongstothegapbetweentwosections).

ulongFindfileoffset(t_module*pmod,ulongaddr);

Parameters:

mod-optionalpointertomoduledescriptor.IfpmodisNULL,Findfileoffsetlooksformoduledescriptorbyitself;

addr-addressinmemoryspaceofdebuggedapplicationwheresearchforfixupswillstart.

Seealso:Findmodule,Findfixup,Finddecode,t_module

Dataconversionfunctions

ulongCompress(char*bufin,ulongnbufin,char*bufout,ulongnbufout);

ulongDecompress(char*bufin,ulongnbufin,char*bufout,ulongnbufout);

ulongGetoriginaldatasize(char*bufin,ulongnbufin);

Compress

Compressesbinarydata.Thisfunctionusespatent-freeformofLempel-Zivcompressionalgorithm.Returnslengthofcompresseddataor0ifsomeerrorwasdetectedduringcompression.Firstlongwordintheoutputbufferistheidentifierofcompresseddataandsecondisthelengthoforiginaldata.

ulongCompress(char*bufin,ulongnbufin,char*bufout,ulongnbufout);

Parameters:

bufin-pointertouncompresseddata;

nbufin-sizeofuncompresseddata;

bufout-pointertobufferthatwillreceivecompresseddata;

nbufout-sizeofbufout.

Seealso:Decompress

Decompress

UnpacksdatacompressedbyCompress.Returnslengthofunpackeddataor0ifsomeerrorwasdetectedduringdecompression.

ulongDecompress(char*bufin,ulongnbufin,char*bufout,ulongnbufout);

Parameters:

bufin-pointertocompresseddata;

nbufin-sizeofcompresseddata;

bufout-pointertobufferthatwillreceiveunpackeddata;

nbufout-sizeofbufout.

Seealso:Compress,Getoriginaldatasize

Getoriginaldatasize

ForthedatacompressedbyCompress,returnssizeoftheoriginaldata.Returns0onerror.

ulongGetoriginaldatasize(char*bufin,ulongnbufin);

Parameters:

bufin-pointertocompresseddata;

nbufin-sizeofcompresseddata;

Seealso:Decompress

Pluginfunctions

intRegisterpluginclass(char*classname,char*iconname,HINSTANCEdllinst,WNDPROCclassproc);

voidUnregisterpluginclass(char*classname);

intPluginwriteinttoini(HINSTANCEdllinst,char*key,intvalue);

intPluginwritestringtoini(HINSTANCEdllinst,char*key,char*s);

intPluginreadintfromini(HINSTANCEdllinst,char*key,intdef);

intPluginreadstringfromini(HINSTANCEdllinst,char*key,char*s,char*def);

intPluginsaverecord(ulongtag,ulongsize,void*data);

intPlugingetvalue(inttype);

t_statusGetstatus(void);

Registerpluginclass

Generatesuniqueclassnameandregistersnewclassofpluginwindows.IficonnameisNULL,usesstandardpluginicon(letter'P').Onsuccess,returns0andfillsclassname(atleast32byteslong)withuniqueclassname.Ifregistrationfailed,returns-1.Windowsbelongingtoregisteredclasshas8longwordsofextramemory,pluginisfreetouselongwords2..7(offsets8..28incallstoGetWindowLongandSetWindowLong).ODBG_Plugininitisthebestplacetocallthisfunction.

intRegisterpluginclass(char*classname,char*iconname,HINSTANCEdllinst,WNDPROCclassproc);

Parameters:

classname-pointertobufferoflengthatleast32charactersthatwillreceiveuniqueclassname;

iconname-nameoficonresourceinpluginDLL;

dllinst-plugin'sinstance;

classproc-pointertowindowprocedureofnewclass.

Seealso:Unregisterpluginclass

Unregisterpluginclass

UnregisterswindowclasspreviouslyregisteredbyRegisterpluginclass.CallthisfunctionforeachregisteredclassfromODBG_Plugindestroy.

voidUnregisterpluginclass(char*classname);

Parameters:

classname-classnamereturnedbycalltoRegisterpluginclass.

Seealso:Registerpluginclass

Pluginwriteinttoini

Storesanintegerassociatedwithakeyintheplugin'spersonalsectionoftheollydbg.ini.Returns1onsuccessand0onerror.

intPluginwriteinttoini(HINSTANCEdllinst,char*key,intvalue);

Parameters:

key-nameofthekeytobeassociatedwithaninteger;

value-integertobewrittentoollydbg.ini.

Seealso:Pluginreadintfromini,Pluginwritestringtoini,Pluginreadstringfromini

Pluginreadintfromini

Readsintegerassociatedwithakeyfromtheplugin'spersonalsectionoftheollydbg.ini.Onsuccess,returnsintegerfromtheinitializationsfile.Onerror,returnsspecifieddefaultvalue.

intPluginreadintfromini(HINSTANCEdllinst,char*key,intdef);

Parameters:

key-nameofthekeyassociatedwithaninteger;

def-defaultvalue.

Seealso:Pluginwriteinttoini,Pluginwritestringtoini,Pluginreadstringfromini

Pluginwritestringtoini

StoresASCIIstringassociatedwithakeyintheplugin'spersonalsectionoftheollydbg.ini.Returns1onsuccessand0onerror.

intPluginwritestringtoini(HINSTANCEdllinst,char*key,char*s);

Parameters:

key-nameofthekeytobeassociatedwithastring;

s-stringtobestoredinollydbg.ini.

Seealso:Pluginreadstringfromini,Pluginwriteinttoini,Pluginreadintfromini

Pluginreadstringfromini

Readsstringassociatedwithakeyfromtheplugin'spersonalsectionoftheollydbg.ini.Onsuccess,returnsstringfromtheinitializationsfile.Onerror,returnsspecifieddefaultstring.

intPluginreadstringfromini(HINSTANCEdllinst,char*key,char*s,char*def);

Parameters:

key-nameofthekeyassociatedwiththestring;

s-pointertobufferthatreceivesstring;

def-pointertoanull-terminateddefaultstring.

Seealso:Pluginwritestringtoini,Pluginwriteinttoini,Pluginreadintfromini,

Pluginsaverecord

Writessinglerecordto.uddfile.Returns1onsuccessand0onerror.CallthisfunctiononlyfromODBG_Pluginsaveudd,anyothercallwillfail.

intPluginsaverecord(ulongtag,ulongsize,void*data);

Parameters:

tag-uniqueplugin-specifictag;

size-sizeofdatatobewrittento.uddfile,maximallyUSERLEN;

data-pointertodataofspecifiedsizetobewrittento.uddfile.

Seealso:ODBG_Pluginsaveudd,ODBG_Pluginuddrecord

Plugingetvalue

RetrievesvariousOllyDbgsettingsandvariables.

intPlugingetvalue(inttype);

Parameters:

type-settingorvariabletoretrieve:

type Castto ExplanationVAL_HINST (HINST) CurrentOllyDbginstance

VAL_HWMAIN (HWND) HandleofthemainOllyDbgwindow

VAL_HWCLIENT (HWND) HandleoftheMDIclientwindow

VAL_NCOLORS Numberofcommoncolors

VAL_COLORS (COLORREF*)

RGBvaluesofcommoncolors

VAL_BRUSHES (HBRUSH*) Handlesofcommoncolorbrushes

VAL_PENS (PEN*) Handlesofcommoncolorpens

VAL_NFONTS NumberofcommonfontsVAL_FONTS (HFONT*) HandlesofcommonfontsVAL_FONTNAMES (char**) Internalfontnames

VAL_FONTWIDTHS (int*) Averagewidthsofcommonfonts

VAL_FONTHEIGHTS (int*) Averageheigthsofcommonfonts

VAL_NFIXFONTS Actualnumberoffixed-pitchfonts

VAL_DEFFONT IndexofdefaultfontVAL_NSCHEMES NumberofcolorschemesVAL_SCHEMES (t_scheme*) Colourschemes

VAL_DEFSCHEME Indexofdefaultcolourscheme

VAL_DEFHSCROLL Defaulthorizontalscroll

VAL_RESTOREWINDOWPOS Restorewindowpositionsfrom.ini

VAL_HPROCESS (HANDLE) Handleofdebuggedprocess

VAL_PROCESSID ProcessIDofdebuggedprocess

VAL_HMAINTHREAD (HANDLE) Handleofmainthreadofdebuggedprocess

VAL_MAINTHREADID ThreadIDofmainthreadofdebuggedprocess

VAL_MAINBASE Baseofmainmoduleinthedebuggedprocess

VAL_PROCESSNAME (char*) Nameofthedebuggedprocess

VAL_EXEFILENAME (char*) Nameofthemaindebuggedfile

VAL_CURRENTDIR (char*) Currentdirectoryfordebuggedprocess

VAL_SYSTEMDIR (char*) Windowssystemdirectory

VAL_DECODEANYIP DecoderegistersdependlessonEIP

VAL_PASCALSTRINGS DecodePascal-stylestringconstants

VAL_ONLYASCII OnlyprintableASCIIcharsindump

VAL_DIACRITICALS Allowdiacriticalsymbolsinstrings

VAL_GLOBALSEARCH Searchfromthebeginningofblock

VAL_ALIGNEDSEARCH Searchalignedtoitem'ssize

VAL_SEARCHMARGIN Floatingsearchallowserrormargin

VAL_KEEPSELSIZE Keepsizeofhexeditselection

VAL_MMXDISPLAY MMXdisplaymodeindialog(0:hex,1:signed,2:unsignedMMX)

VAL_WINDOWFONT Usecallingwindow'sfontindialog

VAL_TABSTOPS Distancebetweentabstops

VAL_MODULES (t_table*) Tableofmodules(.EXEand.DLL)

VAL_MEMORY (t_table*) Tableofallocatedmemoryblocks

VAL_THREADS (t_table*) TableofactivethreadsVAL_BREAKPOINTS (t_table*) Tableofactivebreakpoints

VAL_REFERENCES (t_table*) Tablewithfoundreferences

VAL_SOURCELIST (t_table*) TableofsourcefilesVAL_WATCHES (t_table*) Tableofwatches

VAL_CPUFEATURES CPUfeaturebitsasreturnedbyCPUID

VAL_TRACEFILE (FILE*) HandleofruntracelogfileVAL_ALIGNDIALOGS Aligndialogs

VAL_CPUDASM (t_dump*) DumpdescriptorofCPUDisassemblerpane

VAL_CPUDDUMP (t_dump*) DumpdescriptorofCPUDumppane

VAL_CPUDSTACK (t_dump*) DumpdescriptorofCPUStackpane

VAL_APIHELP (char*) NameofselectedAPIhelpfile

VAL_HARDBP Whetherhardwarebreakpointsareenabled

VAL_PATCHES (t_table*) Tableofpatches

VAL_HINTS (t_sorted*) Sorteddatawithanalysishints

Getstatus

Returnscurrentstatusofdebuggedprocess(oneofSTAT_xxx):

STAT_NONE NoprocesstodebugSTAT_STOPPED ProcesssuspendedSTAT_EVENT Processingdebugevent,processtemporarilypausedSTAT_RUNNING ProcessisrunningSTAT_FINISHED ProcessterminatedSTAT_CLOSING TerminateProcess()called,waitingforconfirmation

t_statusGetstatus(void);

Seealso:Plugingetvalue

Sourcecodesupportfunctions

Sourcedebuggingisstillindevelopmentphase.IdecidednottodescribeitinactualversionofPluginAPI.

CPU-specificfunctions

voidSetcpu(ulongthreadid,ulongasmaddr,ulongdumpaddr,ulongstackaddr,intmode);

voidSetdisasm(ulongasmaddr,ulongselsize,intmode);

voidRedrawdisassembler(void);

voidGetdisassemblerrange(ulong*pbase,ulong*psize);

Setcpu

UpdatesstateofpanesinCPUwindow.Ifnecessary,createsorrestoresCPUwindowandmovesittotop.

voidSetcpu(ulongthreadid,ulongasmaddr,ulongdumpaddr,ulongstackaddr,intmode);

Parameters:

threadid-identifiedofthreadtodisplayinCPU,or0ifthreadremainsunchanged.Ifthreadididnon-zero,parametersasmaddrandstackaddrareignoredandsettocontentsofEIPandESPofthespecifiedthread.Ifthreadidis0andactualthreadisinvalid,Setcpuautomaticallyreswitchestomainthread;

asmaddr-addresstodisplayinDisassembler,or0ifthisaddressremainsunchanged.Ignoredifthreadidisnot0;

dumpaddr-addresstodisplayinCPUDump,or0ifthisaddressremainsunchanged;

stackaddr-addresstodisplayinStack,or0ifthisaddressremainsunchanged.Ignoredifthreadidisnot0;

mode-combinationofCPU_xxxflagsthatselectupdatemode:

CPU_ASMHIST AddchangetoDisassemblerhistory

CPU_ASMCENTER PositionaddressinthemiddleofDisassemblerwindow

CPU_ASMFOCUS MovefocustoDisassembler

CPU_DUMPHIST AddchangetoDumphistory(currentlynotavailable)

CPU_DUMPFIRST MakedumpaddrthefirstbyteinCPUDumpCPU_DUMPFOCUS MovefocustoCPUDump

CPU_REGAUTO AutomaticallychangeRegistersmodetoFPU/MMX/3DNow!

CPU_RUNTRACE Showruntracedataatoffsetasmaddr

CPU_NOCREATE Don'tcreateCPUwindowifabsentCPU_REDRAW RedrawCPUwindowimmediatelyCPU_NOFOCUS Don'tforcefocustomainwindow

Seealso:Setdisasm,Redrawdisassembler,Getcputhreadid

Setdisasm

PresetsCPUDisassemblersothatitdisplayscodeataddressasmaddr.Ifselsizeisgreaterthan1,selectsselsizebytes,otherwise1assemblercommand.ThenitcreatesCPUwindow(ifabsent),restoresandmoveswindowtothetop.

voidSetdisasm(ulongasmaddr,ulongselsize,intmode);

Parameters:

asmaddr-addresstodisplayinDisassembler,or0ifthisaddressremainsunchanged.Ignoredifthreadidisnot0;

selsize-ifgreaterthan1,sizeofselectioninbytes,otherwiseSetdisasmselects1command;

mode-combinationofCPU_xxxflagsthatselectupdatemode:

CPU_ASMHIST AddchangetoDisassemblerhistory

CPU_ASMCENTER PositionaddressinthemiddleofDisassemblerwindow

CPU_ASMFOCUS MovefocustoDisassembler

CPU_REGAUTO AutomaticallychangeRegistersmodetoFPU/MMX/3DNow!

Seealso:Setcpu,Redrawdisassembler,Getcputhreadid

Redrawdisassembler

RedrawsDisassemblerbycallingUpdateWindow,sothatallmodificationsareimmediatelyvisible.

voidRedrawdisassembler(void);

Seealso:Setcpu

Getdisassemblerrange

GetsaddressrangeofmemoryblockthatiscurrentlydisplayedinDisassemblerwindow.

voidGetdisassemblerrange(ulong*pbase,ulong*psize);

Parameters:

pbase-pointertovariablethatreceivesbaseaddressofmemoryblockinaddressspaceofdebuggedapplication;

psize-pointertovariablethatreceivessizeofmemoryblock.

Seealso:Getcputhreadid

t_dump

Typeofdumpdescriptor.

typedefstructt_dump{//Currentstatusofdumpwindow

t_tabletable;//Treatdumpwindowascustomtable

intdimmed;//Drawinlowcolorifnonzero

ulongthreadid;//Usedecodingandregistersifnot0

intdumptype;//Currentdumptype,DU_xxx+count+size

SPECFUNC*specdump;//DecoderofDU_SPECdumptypes

intmenutype;//Standardmenus,MT_xxx

intitemwidth;//Lengthofdisplayeditem,characters

intshowstackframes;//Showstackframesinaddressdump

intshowstacklocals;//Shownamesoflocalsinstack

intshowsource;//Showsourceascommentindisassembler

charfilename[MAXPATH];//Nameofdisplayedorbackupfile

ulongbase;//Startofmemoryblockorfile

ulongsize;//Sizeofmemoryblockorfile

ulongaddr;//Addressoffirstdisplayedbyte

ulonglastaddr;//Addressoflastdisplayedbyte+1

ulongsel0;//Addressoffirstselectedbyte

ulongsel1;//Lastselectedbyte(notincluded!)

ulongstartsel;//Startoflastselection

intcaptured;//Mouseiscapturedbydump

ulongreladdr;//Addressesrelativetothis

charrelname[SHORTLEN];//Symbolforrelativezeroaddressbase

char*filecopy;//CopyofthefileorNULL

char*backup;//Oldbackupofmemory/fileorNULL

intruntraceoffset;//Offsetbackinruntrace

ulongreserved[8];//Reservedforthefutureextentions

}t_dump;

Members:

table-structurethatdescribesdumpwindowasacustomtable;

threadid-ifnon-zero,windowbelongstoCPUandshuldusethread'sregisterswhendisassemblingdata;

dumptype-currentdumptype,combinationofdumptype(oneofDU_xxx),numberofitemsperline((n<<8)&DU_COUNT)andsizeofsingleitem(l&DU_SIZE).AdditionallycanbeORedwithonbeofthefollowingbits:

DU_ESCAPABLE DumpwindowwillcloseonESCkey

DU_BACKUP Dumpwindowdisplaysbackupdata

Forvariable-lengthtypesthesizeis1.SeedescriptionofCreatedumpwindowforalistofcommonlyuseddumptypes;

base-baseaddressofdisplayedmemoryinthememorysizeofdebuggedprocess,usually0forfiledump;

size-sizeofdisplayedfileormemoryarea;

addr-addressoroffsetofthefirstdisplayedbyte;

sel0-addressoroffsetofthefirstselectedbyte(included);

sel1-addressoroffsetofthelastselectedbyte(notincluded);

filecopy-pointertocopyofdisplayedfile,orNULLifthisismemorydump;

backup-pointertolocalbackupofdumpdata,orNULLifbackupisabsent;

runtraceoffset-stepbackinruntrace,or0ifinactive.

Seealso:Createdumpwindow,ODBG_Pluginuddrecord,ODBG_Pluginmenu,ODBG_Pluginaction

t_window

Typeofwindowdescriptor-structuredescribingwindoworcontrolcreatedbydebuggedapplication.

typedefstructt_window{//Descriptionofwindow

ulonghwnd;//Window'shandle

ulongdummy;//Mustbe1

ulongtype;//Typeofwindow,TY_xxx

ulongparenthw;//Handleofparentor0

ulongwinproc;//AddressofWinProcor0

ulongthreadid;//IDoftheowningthread

ulongexstyle;//Extendedwindowstyle

ulongstyle;//Windowstyle

ulongid;//Identifierormenuhandle

ulongclassproc;//Addressofdefault(class)WinProc

intchild;//Indexofnextchild

intlevel;//Levelingenealogy(0:topmost)

intsibling;//Indexofnextsibling

intbyparent;//Indexwhensortedbyparent

chartitle[TEXTLEN];//Window'stitle

charclassname[TEXTLEN];//Classname

chartree[MAXNEST];//ForinternalusebyOllyDbg

}t_window;

Members:

hwnd-handleofwindow(control)createdbydebuggedapplication,casttoHWNDtouseasahandleincallstoWindowsAPIroutines;

dummy-ustbe1toobeytherulesofsorteddata;

type-typeofwindow.TheonlyimportantflaghereisTY_NEW;

parenthw-handleofparentwindoworNULL.Insomecasethismaybethehandleofdesktop(obtainablebycalltoGetDesktopWindow();

winproc-addressofwindowprocedureassociatedwithwindowinmemorycontextofdebuggedapplication.OnNT-basedsystems,GetWindowLong(hwnd,GWL_WNDPROC)returns0andOllyDbgusescodeinjectiontoobtainthisaddress;

threadid-identifierofthreadthatownswindow;

exstyle-extendedstyleofwindow,setofWS_EX_xxxandsimilarflags;

style-styleofwindow,setofWS_xxxandsimilarflags;

id-control'sidentifier;

classproc-addressofwindow'sclassprocedure.Ifclassprocdiffersfromwinproc,windowissubclassed;

title-ASCIIstringwithwindow'stitleortext;

classname-ASCIIstringwithwindow'sclassname.

Typeofreferencedescriptor.

typedefstructt_ref{//Descriptionofreference

ulongaddr;//Addressofreference

ulongsize;//1:singlecommand,otherwisesize

ulongtype;//Typeofreference,TY_xxx

ulongdest;//Destinationofcall

}t_ref;

Members:

addr-addressofreferencingcommandordata;

size-1ifsinglecommandisreferenced,ortotalsize,bytes,ofselectedcommandsotherwise;

type-typeofreference,combinationofTY_xxxflags:

TY_REFERENCE ItemisarealreferenceTY_ORIGIN Itemisasearchorigin

dest-destinationofintermodularcall,0foranyotherreference.

Plugincallbackfunctions

Plugininterfaceincludesseveralcallbackfunctions.OllyDbgcallsthemtoinstallorremovepluginandonimportantevents,likeselectedmenuitemorpressedshortcutkey.Onlytwocallbackaremandatory:ODBG_PlugindataandODBG_Plugininit,allotherareoptional.Don'tforgettoexportyourcallbacks!

intODBG_Plugindata(char*shortname);

intODBG_Plugininit(intollydbgversion,HWNDhw,ulong*features);

voidODBG_Pluginmainloop(DEBUG_EVENT*debugevent);

voidODBG_Pluginsaveudd(t_module*pmod,intismainmodule);

intODBG_Pluginuddrecord(t_module*pmod,intismainmodule,ulongtag,ulongsize,void*data);

intODBG_Pluginmenu(intorigin,chardata[4096],void*item);

voidODBG_Pluginaction(intorigin,intaction,void*item);

intODBG_Pluginshortcut(intorigin,intctrl,intalt,intshift,intkey,void*item);

voidODBG_Pluginreset(void);

voidODBG_Pluginclose(void);

voidODBG_Plugindestroy(void);

intODBG_Paused(intreason,t_reg*reg);

intODBG_Pausedex(intreason,intextdata,t_reg*reg,DEBUG_EVENT*debugevent);

intODBG_Plugincmd(intreason,t_reg*reg,char*cmd);

ODBG_Paused

Optionalcallbackfunction.Ifpresent,OllyDbgwillcalliteachtimethedebuggedapplicationispausedandafterallinternalprocessingisfinished.Pluginmay,forexample,makesomemodificationsandimmediatelycontinueexecutionbycalingGo.Inthiscaseitmayreturn1,disablingtime-consumingredrawingofwindows.Inanyothercaseitmustreturn0.

NotethatifpluginexportsbothODBG_PausedandODBG_Pausedex,onlythesecondfunctionwillbecalled.

intODBG_Paused(intreason,t_reg*reg);

Parameters:

reason-reasonwhyapplicationwaspaused:

PP_EVENT PausedondebuggingeventPP_PAUSE Pausedonuser'srequestPP_TERMINATEDApplicationterminated

reg-pointertoregistersofthreadthatcausedapplicationtopause,maybeNULL.

Seealso:ODBG_Pausedex

ODBG_Pausedex

Optionalcallbackfunction.Ifpresent,OllyDbgwillcalliteachtimethedebuggedapplicationispausedandafterallinternalprocessingisfinished.Pluginmay,forexample,makesomemodificationsandimmediatelycontinueexecutionbycalingGo.Inthiscaseitmayreturn1,disablingtime-consumingredrawingofwindows.Inanyothercaseitmustreturn0.

NotethatifpluginexportsbothODBG_PausedexandODBG_Paused,thesecondfunctionwillnotbecalled.

intODBG_Pausedex(intreason,intextdata,t_reg*reg,DEBUG_EVENT*debugevent);

Parameters:

reason-reasonwhyapplicationwaspaused,usePP_MAINtoextract:

PP_EVENT PausedondebuggingeventPP_PAUSE Pausedonuser'srequestPP_TERMINATEDApplicationterminated

ThereasonmaybeORedwithoneorseveralofthefollowingclarifiers:

PP_BYPROGRAMDebuggingeventcausedbyprogram

PP_INT3BREAK INT3breakpointPP_MEMBREAK MemorybreakpointPP_HWBREAK HardwarebreakpointPP_SINGLESTEP Single-steptrapPP_EXCEPTION Exception,likedivisionby0

PP_ACCESS Accessviolation,likewritingtoNULLpointer

PP_GUARDED Guardedpage

extdata-reserved,currentlyalways0;

reg-pointertoregistersofthreadthatcausedapplicationtopause,maybeNULL;

debugevent-pointertodebugeventthatcausedpause,orNULLiftherewasnoevent.

Seealso:ODBG_Paused

ODBG_Plugincmd

Optionalcallbackfunction.Ifpresent,OllyDbgwillcalliteachtimethedebuggedapplicationpausesonconditionalloggingbreakpointthatspecifiescommandstobepassedtoplugins.EachcommandispassedtoeverypluginthatexportsODBG_Plugincmd,sopluginmustdecidebyitselfwhetheritshouldexecutecommandornot.Forexample,samplecommandlinepluginacceptsallcommandsthatbeginwithapoint.Ifpluginrecognizescommand,itmustreturn1tostopOllyDbgfrompassingittoremainingplugins.Otherwise,itmustreturn0.

intODBG_Plugincmd(intreason,t_reg*reg,char*cmd);

Parameters:

reason-reasonwhyprogramwaspaused,currentlyalwaysPP_EVENT;

reg-pointertoregistersofthreadthatcausedapplicationtopause,maybeNULL;

cmd-null-terminatedcommandtoplugin.

ODBG_Plugindata

MandatorycallbackfunctionthatmustbepresentinanyvalidOllyDbgplugin.Itmustfillinpluginnameandreturnversionofplugininterface(constantPLUGIN_VERSION).Iffunctionisabsent,orversionisnotcompatible,pluginwillbenotinstalled.ShortnameidentifiesplugininOllyDbg.Thisnameislimitedto31alphanumericalcharactersorspacesfollowedbyterminatingnullcharacter.Tokeeplifeeasyforusers,nameshouldbedescriptiveandcorrelatewiththenameofDLL.

intODBG_Plugindata(char*shortname);

Parameters:

shortname-pointertobufferoflengthatleast32charactersthatreceivesnameofplugin.Thisnamemayincludespacesandpunctuatorsbutnospecialsymbols.

ODBG_Plugininit

MandatorycallbackfunctionthatmustbepresentinanyvalidOllyDbgplugin.Hereyoucanplaceallstartupinitializationsandallocateresources.Ifstartupwassuccessfull,functionmustreturn0.Onerror,itmustfreeallocatedresourcesandreturn-1,inthiscasepluginwillberemoved.ParameterollydbgversionistheversionofOllyDbg,useittoassurethatOllyDbgiscompatiblewithyourplugin.

intODBG_Plugininit(intollydbgversion,HWNDhw,ulong*features);

Parameters:

ollydbgversion-versionofOllyDbg.Checkthatyourpluginiscompatiblewiththisversion.IwilltrytoavoidincompatiblechangesinthefutureversionsofOllyDbg;

hw-handleofmainOllyDbgwindow,keepitifnecessary;

features-reservedforfutureextentions.

Seealso:ODBG_Pluginreset,ODBG_Pluginclose,ODBG_Plugindestroy

ODBG_Pluginmainloop

Optionalcallbackfunction.Ifpresent,OllyDbgwillcallitoneachpassofmainloop.Hereyoucandoallyourperiodicaltasks.Don'tassumethatcallsareequidistant;theyaren't.Donotexportthisfunctionunnecessarily,asthismaynegativelyinfluencetheoverallspeed!

voidODBG_Pluginmainloop(DEBUG_EVENT*debugevent);

Parameters:

debugevent-pointertodebugeventreceivedbycalltoWindowsAPIfunctionWaitForDebugEvent,orNULLiftherewasnoevent.

ODBG_Pluginsaveudd

Optionalcallbackfunction.Ifpresent,OllyDbgcallsitwhensomemodulerequeststosavemodule-orapplication-relateddatato.uddfile.Tosavedatato.uddfile,callPluginsaverecordforeachdataitemthatmustbesaved.Global,appliction-orienteddatamustbesavedintehmain.uddfile;module-relevantdatamustbesavedinmodule.uddfiles.Savealladdressesrelativetothebaseofmodulesothatdatawillberestoredcorrectlyevenwhenmoduleisrelocated.

voidODBG_Pluginsaveudd(t_module*pmod,intismainmodule);

Parameters:

pmod-pointertomoduledescriptor;

ismainmodule-flagindicatingwhetherthisismainmoduleofdebuggedapplication(.exe).

Seealso:Pluginsaverecord,t_module

ODBG_Pluginuddrecord

Optionalcallbackfunction.Ifpresent,OllyDbgcallsODBG_Pluginuddrecordwhenitreads.uddfileandencountersunrecognizedrecord.Ifrecordbelongstoplugin,itmustprocessrecordandreturn1,otherwiseitmustreturn0topassrecordtootherplugins.Notethatmoduledescriptorpointedtobypmodcanbeincomplete,i.e.doesnotnecessarilycontaininformationstoredinprocessed.uddfile,likedecodingdataorhittracebufer.

intODBG_Pluginuddrecord(t_module*pmod,intismainmodule,ulongtag,ulongsize,void*data);

Parameters:

pmod-pointertomoduledescriptor;

ismainmodule-flagindicatingwhetherthisismainmoduleofdebuggedapplication(.exe);

tag-tagthatidentifiesrecord;

size-sizeofdata;

data-pointertobinaryrecorddata.

Seealso:Pluginsaverecord,t_module

ODBG_Pluginmenu

Optionalcallbackfunction.Ifpresent,OllyDbgcallsittogivepluginthepossibilitytoaddmenuitemseithertomainOllyDbgmenu(origin=PM_MAIN)ortopopupmenuinoneofstandardOllyDbgwindows.Toaddmenuitems,pluginmustpreparestringthatdescribesmenustructureandreturn1,otherwiseitmustreturn0.AsageneralOllyDbgrule,donotaddinactiveitemstomenu.

intODBG_Pluginmenu(intorigin,chardata[4096],void*item);

Parameters:

origin-codeofwindowthatcallsODBG_Pluginmenu.OllyDbgsupportsfollowingcodes:

Code Castitemto WhocallsODBG_Pluginmenu

PM_MAINitemisalwaysNULL

Mainwindow

PM_DUMP (t_dump*) AnyDumpwindowPM_MODULES (t_module*) ModuleswindowPM_MEMORY (t_memory*) MemorywindowPM_THREADS (t_thread*) ThreadswindowPM_BREAKPOINTS (t_bpoint*) BreakpointswindowPM_REFERENCES (t_ref*) ReferenceswindowPM_RTRACE (int*) Runtracewindow

PM_WATCHES (1-basedindex) Watcheswindow

PM_WINDOWS (t_window*) WindowswindowPM_DISASM (t_dump*) CPUDisassemblerPM_CPUDUMP (t_dump*) CPUDumpPM_CPUSTACK (t_dump*) CPUStackPM_CPUREGS (t_reg*) CPURegisters

data-pointertobuffer4Kbyteslongthatreceivesdescriptionofmenustructure.

Ordinarymenuitemconsistsofdecimalidentificator(0to63)followedbyname.Whenuserselectssomemenuitem,Pluginactionreceivesidentifierofthisitem.Duplicatedidentifiersareallowed.Usecomma(,)toseparatemenuitems.Verticalline(|)placeshorizontaldividinglineinmenu.Tocreatesubmenu,additsnamefollowedbycontentsofsubmenuenclosedintobraces.OllyDbgautomaticallyremovesunnecessaryorduplicatedseparatorsandemptysubmenus.Toforcehorizontaldividingline,use#symbol.Someexamples:

0&Aaa,2&Bbb|3&Ccc|,,

Linearmenuwith3items:Aaa,BbbandCcc,relativeIDs0,2and3,menushortcutsA,BandC.Separatorbetweensecondandthirditem,lastseparatorandcommasareignored

#A{0Aaa,B{1Bbb|2Ccc}}

Unconditionalseparator,followedbypopupmenuAwithtwoelements,secondofthemispopupBwithtwoelementsandseparatorinbetween

item-pointereithertoselectedelementofsorteddatadisplayedinwindowor,incaseofdumpwindows,pointertodumpdescriptor.CanbeNULL.Youmayneedthiselementtofindoutwhichmenuitemsapplytoselecetditem.

Seealso:ODBG_Pluginaction,Pluginaction,Plugingetvalue

ODBG_Pluginaction

Optionalcallbackfunction.Ifpresent,OllyDbgcallsiteachtimetheuserselectedmenuitemaddedtomenubyODBG_Pluginmenu.

voidODBG_Pluginaction(intorigin,intaction,void*item);

Parameters:

origin-codeofwindowthatcallsODBG_Pluginaction.OllyDbgsupportsfollowingcodes:

Mainwindow

PM_WINDOWS (t_window*) WindowswindowPM_DISASM (t_dump*) CPUDisassemblerPM_CPUDUMP (t_dump*) CPUDumpPM_CPUSTACK (t_dump*) CPUStackPM_CPUREGS (t_reg*) CPURegisters

action-identifierofmenuitem(0..63),assetbyODBG_Pluginmenu;

item-pointereithertoselectedelementofsorteddatadisplayedinwindowor,incaseofdumpwindows,pointertodumpdescriptor,orNULL.Youmayneedthis

elementtocarryoutrequestedaction.

Seealso:ODBG_Pluginmenu,Pluginaction,Plugingetvalue,Custommessages

ODBG_Pluginshortcut

Optionalcallbackfunction.Ifpresent,OllyDbgcallsiteachtimewhenuserpressescombinationofkeysthatisnotrecognizedbystandardOllyDbgwindow.Thisfunctionisusuallycalledtwice:firsttimewithorigin=PM_MAINindicatingglobalshortcut,andsecondtimewithoriginidentifierofwindowthathaskeyboardfocus.ShortcutsarescarceresourceandIwillconstantlyaddnewtoOllyDbg,sousethisfeaturewithcareandalwaysimplementalternativepossibilities.

intODBG_Pluginshortcut(intorigin,intctrl,intalt,intshift,intkey,void*item);

Parameters:

origin-codeofwindowthatcallsODBG_Pluginshortcut.OllyDbgsupportsfollowingcodes:

Mainwindow

PM_WINDOWS (t_window*) WindowswindowPM_DISASM (t_dump*) CPUDisassemblerPM_CPUDUMP (t_dump*) CPUDumpPM_CPUSTACK (t_dump*) CPUStack

PM_CPUREGS (t_reg*) CPURegisters

ctrl-stateofCtrlkey:0-released,1-pressed;

alt-stateofAltkey:0-released,1-pressed;

shift-stateofShiftkey:0-released,1-pressed;

key-codeofpressedvirtualkey(VK_xxx).See"VirtualKeyCodes"inWindowsAPIhelpforacompletelistofvirtualkeycodes;

item-pointereithertoselectedelementofsorteddatadisplayedinwindowor,incaseofdumpwindows,pointertodumpdescriptor,orNULL.Youmayneedthiselementtocarryoutrequestedaction.

ODBG_Pluginreset

Optionalcallbackfunction.Ifpresent,OllyDbgcallsODBG_Pluginresetwhenuseropensneworrestartscurrentapplication.Pluginshouldresetinternalvariablesanddatastructurestoinitialstate.

voidODBG_Pluginreset(void);

ODBG_Pluginclose

OllyDbgcallsthisoptionalfunctionwhenuserwantstoterminateOllyDbg.AllMDIwindowscreatedbypluginstillexist.Thisisthebestpossibilitytosavepluginparametersto.inifile.Functionmustreturn0ifitissafetoterminateOllyDbg.Anynon-zeroreturnwillstopclosingsequence.Donotmisusethispossibility!Alwaysinformuseraboutthereasonswhyterminationisnotgoodandaskforhisdecision!

voidODBG_Pluginclose(void);

Seealso:ODBG_Plugindestroy,Pluginwriteinttoini,Pluginwritestringtoini

ODBG_Plugindestroy

OllyDbgcallsthisoptionalfunctiononceonexit.Atthismoment,allMDIwindowscreatedbypluginarealreadydestroyed(receivedWM_DESTROYmessages).Functionmustfreeallinternallyallocatedresources,likewindowclasses,files,memoryandsoon.

voidODBG_Plugindestroy(void);

Breakpointfunctions

INT3breakpointsarebrieflyexplainedhere.

intManualbreakpoint(ulongaddr,intkey,intshiftkey,ulongnametype,intfont);

voidTempbreakpoint(ulongaddr,intmode);

intSetbreakpoint(ulongaddr,ulongtype,ucharcmd);

intSetbreakpointext(ulongaddr,ulongtype,ucharcmd,ulongpasscount);

ulongGetbreakpointtypecount(ulongaddr,ulong*passcount);

intSetmembreakpoint(inttype,ulongaddr,ulongsize);

NotethathardwarebreakpointsarenotsupportedbyWindows95andWindows98.Toassurethatyoucanusefunctionslistedbelow,callPlugingetvalue(VAL_HARDBP):

intSethardwarebreakpoint(ulongaddr,intsize,inttype);

intHardbreakpoints(intcloseondelete);

intDeletehardwarebreakpoint(intindex);

intDeletehardwarebreakbyaddr(ulongaddr);

Setbreakpoint

Simplified(old)versionofSetbreakpointext,keptforcompatibilityreasons.EquivalenttocallSetbreakpointext(addr,type,cmd,0).

intSetbreakpoint(ulongaddr,ulongtype,ucharcmd);

Parameters:

addr-addressofbreakpoint.Ifaddresspointstodataorinthemiddleofthecommand,OllyDbgwillaskyouforconfirmation;

type-combinationofbitsTY_xxxthatspecifyrequestedactionsandtypeofbreakpoint,seedescriptionofSetbreakpointext;

cmd-originalcommandthatwillbesavedtodescriptorifbitTY_KEEPCODEisset.Otherwise,thisparameterisignoredandcommandisreadfromthememory.

Setbreakpointext

SetsnewINT3breakpointorchangestypeofexistingbreakpointatspecifiedaddress.Returns0onsuccessand-1onerror(i.e.breakpointwasneithersetnorrestored).IfbitTY_KEEPCONDintypeisset,condition,explanationandexpressionassociatedwithbreakpoint(explainedhere)remainunchanged,otherwisetheyareremoved.IfbitTY_SETCOUNTissetorbreakpointisabsent,setsspecifiedpasscount,otherwisepasscountremainsunchanged.

intSetbreakpointext(ulongaddr,ulongtype,ucharcmd,ulongpasscount);

Parameters:

addr-addressofbreakpoint.Ifaddresspointstodataorinthemiddleofthecommand,OllyDbgwillaskyouforconfirmation;

type-combinationofbitsTY_xxxthatspecifyrequestedactionsandtypeofbreakpoint:

Flag Meaning

TY_ACTIVE Setpermanent(user)breakpointorrestoredisabled

TY_DISABLEDTemporarilydeactivatepermanentbreakpoint.IfTY_ACTIVEandTY_DISABLEDaresetsimultaneously,TY_DISABLEDisignored

TY_ONESHOTSetone-shotbreakpointthatwillbeautomaticallyremovedwhenhit.Doesn'tinterferewithactivebreakpoint

TY_TEMP

Settemporarybreakpointthatwillbeautomaticallyremovedwhenhit.Executioncontinuesautomatically.TY_TEMPdoesnotinterferewithactivebreakpoint

TY_STOPAN StopanimationifbreakpointishitTY_KEEPCODE Forceoriginalcommand(parametercmd)

TY_SETCOUNT ForcepasscountevenifbreakpointalreadyexistsLeaveassociatednamesoftypesNM_BREAK,

TY_KEEPCOND NM_BREAKEXPR,NM_BREAKEXPLandNM_PLUGCMDunchanged.Ifthisbitisnotset,breakpointsoftypesTY_ACTIVEandTY_DISABLEDclearthesenames

cmd-originalcommandthatwillbesavedtodescriptorifbitTY_KEEPCODEisset.Otherwise,thisparameterisignoredandcommandisreadfromthememory;

passcount-passcount,i.e.thenumberoftimesthisbreakpointshouldbeskipped.IfbreakpointalreadyexistsandflagTY_SETCOUNTisnotset,thisparameterisignoredandpasscountremainsunchanged.

Tosetconditionalbreakpoint,consideruseofManualbreakpoint.Ifbreakpointmustbesetautomatically(i.e.withoutuser'sinterference),pleasedothefollowing:

·Ifdebuggedprogramisstillrunning,callSuspendprocesstomakefollowingoperationsatomic;

·CallSetbreakpointext(addr,TY_ACTIVE,0,passcount),thussettingINT3breakpointandrelatedpasscount.Thisisenoughforordinary(unconditional)breakpoint;

·Ifnecessary,setconditionbycalltoInsertname(addr,NM_BREAK,condition).Thisisenoughforconditionalbreakpoint;

·Tosetconditionalloggingbreakpoint,youmustadditionallypreparecontrolbyte,expressionandexplanationandsetthemcallingInsertname(NM_BREAKEXPR)andInsertname(NM_BREAKEXPL);

·Ifnecessary,resumeexecution(Go).

Seealso:Breakpointfunctions,Manualbreakpoint,Setbreakpoint,Getbreakpointtypecount.

Howbreakpointworks

OllyDbgsupportsmanykindsofINT3breakpoints:ordinary,conditionalandconditionallogging.Ofcourse,internallythisisthesamebreakpointwithdifferentoptionsactivated.Atthefirstglance,itlooksovercomplicatedandillogical;butitisreallyso.Version2.0shouldmakebreakpointsbetter,butnowyoumustlivewithwhatyouhave.

Breakpointconsistsofsingle-bytecommandINT3thatreplacesfirstbyteofthebreakpointedcommand,descriptoroftypet_bpointintableofactivebreakpointsandseveralnamesassociatedwiththesameaddressthatspecifyexpressionsandnecessaryactions:

Nametype Meaning

NM_BREAKConditionassociatedwithbreakpoint.Ifconditionisabsentorinvalid,OllyDbgassumesthatitistrue;

NM_BREAKEXPL

Explanation-anytextthatidentifiesbreakpointtouser.Usuallyhasnospecialmeaning.Messagebreakpointsusespecialname"<WinProc>";

NM_BREAKEXPR

Expressionthatshouldbeestimatedandlogged.Firstbyteofexpressioncontainsflags(setofCOND_xxx,explainedbelow)thatcontrolbehaviourofbreakpoint;

NM_PLUGCMD

Commandsthatwillbepassed,onebyone,topluginsifbreakpointistaken.CommandareseparatedbyCR,LForCRLF.

Ordinarybreakpoint(toggledifyoupressF2)hasnoassociatednamesandzeropasscount.Programpauseswheneverthisbreakpointishit.

Conditionalbreakpoint(shortcutShift+F2)hasassociatednameoftypeNM_BREAK.Ifbreakpointishit,OllyDbgestimatesvalueofexpression.Ifresultisnot0,orexpressionisinvalid,programpauses.Otherwise,OllyDbg

continuesexecution.

Conditionalloggingbreakpoint(Shift+F4)hasatleastassociatednameoftypeNM_BREAKEXPR.FirstbyteofthisnameisasetofflagsCOND_xxxthatspecifyadditionaloptions.StrangesettingsofbitsCOND_NOBREAKandCOND_BRKALWAYSareforbackwardcompatibilitywithversion1.00.Asyousee,sodeepcompatibilityisnotalwaysgood:

Bit Meaning Equivalentindialog

COND_NOBREAK

Don'tpauseexecutionifbreakpointishit.HashigherprioritythanCOND_BRKALWAYS

Pauseprogram:Never

COND_BRKALWAYS

Alwayspauseifbreakpointishit.IfbothCOND_NOBREAKandCOND_BRKALWAYSarezero,pauseoncondition

Pauseprogram:Always

COND_LOGTRUE

EstimatevalueofexpressionNM_BREAKEXPRandlogittogetherwithNM_BREAKEXPLifconditionistrue

Logvalue:Oncondition

COND_LOGALWAYS Alwayslogvalueofexpression Logvalue:Always

COND_ARGTRUEDecodeandlogargumentsofknownfunctionifexpressionistrue

Logarguments:Oncondition

COND_ARGALWAYS AlwayslogargumentsofknownfunctionLogarguments:Always

COND_FILLING Alwayssettoassurethatresultingbyteisnot0

Descriptorofbreakpointcontainspasscount.ThisfeatureisnewtoOllyDbg1.10.Ifbreakpointishitandconditions(ortheirabsence)indicatethatprogramshouldbepaused,OllyDbgcomparespasscountwith0.Ifcountis0,programpauses.Otherwise,OllyDbgdecrementscounterandcontinuesexecution.Passcountdoesnotrestoreautomatically,thatis,afteritisdecrementedtozero,it

remainszerountiluserorpluginwillsetitagain.

Seealso:Breakpointfunctions,Manualbreakpoint,Setbreakpoint,Setbreakpointext,Getbreakpointtypecount.

Getbreakpointtypecount

Returnstype(combinationofbitsTY_xxx)andassociatedpasscountofINT3breakpointatspecifiedaddress.Ifbreakpointdoesn'texist,returnsTY_INVALID.

ulongGetbreakpointtypecount(ulongaddr,ulong*passcount);

Parameters:

addr-addressofbreakpoint;

passcount-pointertovariablethatwillreceivepasscount,canbeNULL.

Seealso:Breakpointfunctions,Howbreakpointworks,Manualbreakpoint,Setbreakpoint,Setbreakpointext.

t_bpoint

TypeofINT3breakpointdescriptor:

typedefstructt_bpoint{//DescriptionofINT3breakpoint

ulongaddr;//Addressofbreakpoint

ulongdummy;//Always1

ulongtype;//Typeofbreakpoint,TY_xxx

charcmd;//Oldvalueofcommand

ulongpasscount;//Actualpasscount

}t_bpoint;

Members(membersthatintendedstriclyforinternalusearenotexplained):

dummy-lengthofbreakpoint,mustbe1;

type-typeofbreakpoint,combinationofbitsTY_xxx.Avoiddirectmodification.Pleasedonotchangeflagsthatarenotdescribedhere:

Flag MeaningTY_SET CodeINT3isinmemory.Neverchange!TY_ACTIVE Permanent(user)breakpointTY_DISABLED Temporarilydeactivatedpermanentbreakpoint

TY_ONESHOT One-shotbreakpointsetbyOllyDbg,automaticallyremovedifbreakpointishit

TY_TEMP

Temporarybreakpoint,usedinternallybyOllyDbg,forexampletostepoverpermanentbreakpoint.Automaticallyremovedwhenhit,executioncontinues

cmd-originalcommandatspecifiedaddress.Ifbreakpointisactive,thiscommandisreplacedinmemorybyINT3;

passcount-counterthatindicateshowmanytimesthisbreakpointmustbeskipped.IfOllyDbgdecidesthatprogramshouldpauseatbreakpointandpasscountisnot0,itdecrementspasscountandcontinuesexecution.NotethatthisitemisnewtoOllyDbg1.10.

Togetbreakpointdescriptor,youmayusethefollowingcode:

t_table*bptable;

t_bpoint*bpoint;

bptable=(t_table*)Plugingetvalue(VAL_BREAKPOINTS);

if(bptable!=NULL){

bpoint=(t_bpoint*)Findsorteddata(&(bptable->data),addr);

if(bpoint!=NULL){

.....anynecessaryactions.....

Seealso:Breakpointfunctions,Setbreakpoint,Setbreakpointext,Tempbreakpoint

Manualbreakpoint

FacilitatesmanualINT3breakpointsetting,eitherfrommenuorkeyboardshortcut.SupportsstandardOllyDbg"lookandfeel".Returns0ifsomeactiontookplaceand-1otherwise.Followingcombinationsaresupported:

key shiftkey ActionVK_F2 0 Toggleunconditionalbreakpoint

VK_F2 Pressed(not0) Setconditionalbreakpoint

VK_F4 Pressed(not0) Setloggingbreakpoint

intManualbreakpoint(ulongaddr,intkey,intshiftkey,ulongnametype,intfont);

Parameters:

addr-memoryaddressintheaddressspaceofdebuggedapplicationwhereINT3breakpointmustbeset;

key-VK_F2orVK_F4(seeabove);

shiftkey-stateofshiftkey(seeabove);

nametype-setto0whencallingManualbreakpointfromplugin;

font-indexofpredefinedfonttobeusedininvokeddialogs.Ifnotsure,useFIXEDFONT.

Tempbreakpoint

Setstemporaryorone-shotbreakpointonexecution.Ifpossible,setshardwarebreakpoint,otherwiseINT3.OllyDbgautomaticallyremovestemporaryandone-shotbreakpoints.

voidTempbreakpoint(ulongaddr,intmode);

Parameters:

addr-codeaddresswheretemporarybreakpointshouldbeset;

mode-typeofbreakpointtoset:

TY_ONESHOT|TY_KEEPCOND

Setone-shotbreakpoint.OllyDbgautomaticallyremovesone-shotbreakpointwhenhitandpausesdebuggedapplication

TY_ONESHOT|TY_KEEPCOND|TY_STOPAN

Sameasabove,additionallystopsanykindoftraceoranimationwhenhit

TY_TEMP|TY_KEEPCOND

Settemporarybreakpoint.OllyDbgautomaticallyremovestemporarybreakpointwhenhitandimmediatelycontinues

execution

AnyothercombinationSetsINT3breakpointofspecifiedtype

Setmembreakpoint

Modifiesorremovesmemorybreakpoint.OllyDbgsupportsonlyonememorybreakpointatatime.Returns0onsuccessand-1onerror.CallSetmembreakpoint(0,0,0)todisablememorybreakpoint.

intSetmembreakpoint(inttype,ulongaddr,ulongsize);

Parameters:

type-typeofmemorybreakpoint.UseeitherMEMBP_READorMEMBP_READ|MEMBP_WRITE;

addr-startofmemorybreakpointintheaddressspaceofdebuggedapplication;

size-sizeofmemorybreakpoint,bytes.

Sethardwarebreakpoint

Setshardwarebreakpointandactivatesit.80x86compatibleprocessorssupport4hardwarebreakpoints.Ifallavailableslotsareinuse,functionasksusertodeleteoneofactivebreakpoints.Returns0onsuccessand-1onerrororifusercancelledaction.ItisallowedtocallSethardwarebreakpoint"onthefly",i.e.whendebuggedapplicationisrunning.

NotethathardwarebreakpointsarenotsupportedbyWindows95andWindows98.Toassurethatyoucanusethisfunction,callPlugingetvalue(VAL_HARDBP).

intSethardwarebreakpoint(ulongaddr,intsize,inttype);

Parameters:

size-sizeofmemorycoveredbyhardwarebreakpoint(1,2or4bytes).addrmustbealignedonthecorrespondingboundary.Thisparametermustbe1incaseofbreakpointonexecution;

type-typeofhardwarebreakpoint:

HB_CODE ActiveoncommandexecutionHB_ACCESS Activeonread/writeaccessHB_WRITE Activeonwriteaccess

Seealso:Hardbreakpoints,Deletehardwarebreakpoint,Deletehardwarebreakbyaddr

Hardbreakpoints

Createsdialogenablingusertoview,followanddeleteexistinghardwarebreakpoints.Ifcloseondeleteis1,dialogclosesaftersomebreakpointisdeleted.Returns-1onerrororifusercancelledactionand0otherwise.

intHardbreakpoints(intcloseondelete);

Parameters:

closeondelete-if1,asksusertodeletesomeexistingbreakpointandclosesdialogwindowaftersomehardwarebreakpointisdeleted.

Seealso:Sethardwarebreakpoint,Deletehardwarebreakpoint,Deletehardwarebreakbyaddr

Deletehardwarebreakpoint

80x86processorssupportupto4hardwarebreakpoints.ThisfunctionremoveshardwarebreakpointwithspecifiedindexpreviouslysetbyOllyDbg.Returns0onsuccessand-1onerror.OllyDbgmayusehardwarebreakpointstobypassactualcommand,sousethisfunctionwithcare!FunctionDeletehardwarebreakbyaddriseasiertouse.

intDeletehardwarebreakpoint(intindex);

Parameters:

index-indexofhardwarebreakpointtodelete(0..3).

Seealso:Sethardwarebreakpoint,Hardbreakpoints,Deletehardwarebreakbyaddr

Deletehardwarebreakbyaddr

Deleteshardwarebreakpointbyaddress.Ifthereareseveralbreakpointsembracingsameaddres,deletesallsuchbreakpoints.Returnsnumberofdeletedbreakpointsor0onerror.

intDeletehardwarebreakbyaddr(ulongaddr);

Parameters:

addr-addressofhardwarebreakpoint.Everyhardwarebreakpointthatcoversthisaddresswillberemoved.Forexample,ifhardwarebreakpointhasaddress0x00123450andsize4,itcoversaddressrangefrom0x00123450to0x00123453inclusive.

Seealso:Sethardwarebreakpoint,Hardbreakpoints,Deletehardwarebreakpoint

Executionandsteppingfunctions

Executionandsteppingfunctionslistedinthissectioncheckforrougherrorsbut,whenimproperlyused,maybringOllyDbginunstablestate.Pleaseusethemwithcare!Forsimpletasks,consideruseofSendshortcut.

intOpenEXEfile(char*path,intdropped);

intAttachtoactiveprocess(intprocessid);

intGo(ulongthreadid,ulongtilladdr,intstepmode,intgivechance,intbackupregs);

voidAnimate(intanimation);

intSuspendprocess(intprocessevents);

ulongRunsinglethread(ulongthreadid);

voidRestoreallthreads(void);

Continuesexecutionofthedebuggedprogram.Returns-1ifcontinuationisimpossibleand0onsuccess.ImproperuseofthisfunctionmaybringOllyDbginunstableorundefinedstate.Forsimpletasks,consideruseofSendshortcut.

intGo(ulongthreadid,ulongtilladdr,intstepmode,intgivechance,intbackupregs);

Parameters:

threadid-threadIDtocontinue.Ifthreadidis0,functionassumesthreadwherelastdebuggingeventoccured;

tilladdr-ifstepmodeisSTEP_SKIP,functionrequestsskippingofallcommandsuptotilladdratonce.Callingroutinemustguaranteethattilladdristhefirstbyteofsomecommandandthatsequenceinbetweenhasnojumps/returnstooutside.Otherwise,setstemporarybreakpointontilladdrsothatprogramwillpauseatthispoint(like"Runtolselection"inDisassembler).

stepmode-steppingmode,oneofthefollowing:

STEP_SAME SameactionasonpreviouscalltoGoSTEP_RUN RunprogramSTEP_OVER Stepover(executecallsatonce)STEP_IN Stepin(entersubroutines)STEP_SKIP Skipsequencetillspecifiedaddress

givechance-ifdebuggedapplicationwaspausedonexceptionandthisparameterisnot0,passesexceptiontoexceptionhandlerinstalledbyapplication;

backupregs-ifnot0,updatesoldthreadregisters(elementoldregofstructuret_thread).Disassemblerusesbackuptohighlightmodifiedregisters.

Seealso:OpenEXEfile,Animate,Suspendprocess,Runsinglethread,Restoreallthreads

Animate

Setsanimationmodeand,ifrequestedindebugoptions,setshigherprioritytodebuggedprocess.Noticethatthisfunctiondoesn'tstartsteppingoranimation,youmustexplicitelycallGoafterwards.ImproperuseofAnimatemaybringOllyDbginunstablestate.Forsimpletasks,consideruseofSendshortcut.

voidAnimate(intanimation);

Parameters:

animation-animationmode:

ANIMATE_OFF NoanimationANIMATE_IN AnimateintoANIMATE_OVER AnimateoverANIMATE_RET ExecutetillRET

ANIMATE_SKPRET ExecutetillRET,thenskipRETinstruction

ANIMATE_USER ExecutetillusercodeANIMATE_TRIN RuntraceinANIMATE_TROVER RuntraceoverANIMATE_STOP Gracefullystopanimation

Seealso:OpenEXEfile,Go,Suspendprocess,Runsinglethread,Restoreallthreads

Suspendprocess

Suspendsallthreadsoftheprocessbeingdebugged.Itmayhappen(especiallywhenloggingbreakpointsaresetorhittraceisactive)thatthreadswillbesuspendedaftersomebreakpointisexecutedbutcorrespondingdebugeventisnotprocessed.IfyouwantOllyDbgtoprocesseventsbeforereturningfromSuspendprocess,callitwithprocessevents=1.Returns0onsuccessand-1incaseofanyerror.Toresumeexecution,callGo.ThisfunctionisslowonWin95-basessystems.

intSuspendprocess(intprocessevents);

Parameters:

processevents-processpendingdebuggingeventsbeforereturn.

Seealso:OpenEXEfile,Go,Animate,Runsinglethread,Restoreallthreads

Runsinglethread

Suspendsallthreadsexceptforspecified,andresumesspecifiedthreadevenifitwassuspended.Ifthreadidis0orinvalid,suspendsallthreads.ReturnsthreadIDofthethreadthatwastheonlyonerunning,threadIDofthemainthreadiftherewerenone/morethan1activethreads,and0onerror.Toreverseeffectofthisfunction,callRestoreallthreads.ImproperuseofthisfunctionmaybringOllyDbginunstableorundefinedstate.

ulongRunsinglethread(ulongthreadid);

Parameters:

threadid-identifier(nothandle!)ofthreadtorun,or0tosuspendallthreads.

Seealso:OpenEXEfile,Go,Animate,Suspendprocess,Restoreallthreads

OpenEXEfile

Closesactuallprocessandstartsnewexecutableorlinkspecifiedinpath.Returns0ifexecutablefileissuccessfullystarted.Displayserrormessageandreturns-1iffileisnota32-bitPortableExecutableorOllyDbgwasunabletocreatenewprocess.

intOpenEXEfile(char*path,intdropped);

Parameters:

path-pointertoASCIIstringwithnameofexecutablefile(.exe)orExplorerlinkfile(.lnk);

dropped-setto1ifexecutablefilewasdrag-and-droppedtoOllyDbgorplugin,otherwisesetitto0.Currently,theonlyactionofthisflagistoclearcommandline.

Seealso:Go,Animate,Suspendprocess,Runsinglethread,Restoreallthreads

Restoreallthreads

Restoresoriginalthreadstates(asbeforethesequenceofcallstoRunsinglethread).Warnsifallthreadsaresuspended.

voidRestoreallthreads(void);

Seealso:OpenEXEfile,Go,Animate,Suspendprocess,Runsinglethread

Traceandprofilingfunctions

char*Findhittrace(ulongaddr,char**ptracecopy,ulong*psize);

intModifyhittrace(ulongaddr0,ulongaddr1,intmode);

intRuntracesize(void);

intFindprevruntraceip(ulongip,intstartback);

intFindnextruntraceip(ulongip,intstartback);

intStartruntrace(t_reg*preg);

voidDeleteruntrace(void);

voidSettracecondition(char*cond,intonsuspicious,ulongin0,ulongin1,ulongout0,ulongout1);

voidSettracecount(ulongcount);

intGetruntraceregisters(intnback,t_reg*preg,t_reg*pold,char*cmd,char*comment);

intGetruntraceprofile(ulongaddr,ulongsize,ulong*profile);

voidScrollruntracewindow(intback);

HWNDCreateprofilewindow(ulongbase,ulongsize);

Settracecount

Setsnumberofcommandstotrace.Afterspecifiednumberofcommandsisloggedtotracebuffer,tracepauses.UsuallyyoumaycallthisfunctionafterSettracecondition.

voidSettracecount(ulongcount);

Parameters:

count-numberofcommandstoexecutebeforeruntracepauses.

Seealso:Settracecondition

Findhittrace

Lookswhetherhittraceinformationisavailablestartingfromspecifiedaddress.Returnspointertohittraceinformationcorrespondingtogivenaddressandoptionallysets*ptracecopytocopyoforiginalcodeand*psizetosizeofremainingdata.ReturnsNULLandsets*psizeto0ifthereisnodecodinginformation.HittraceinformationisanarrayofbytesthatarethecombinationofbitsTR_xxx.

char*Findhittrace(ulongaddr,char**ptracecopy,ulong*psize);

Parameters:

addr-addressoffirstbyteofthecodeintheaddressspaceofdebuggedapplication;

ptracecopy-pointertovariablethatreceivespointertostaticalcopyoforiginalcode,maybeNULL;

psize-pointertovariablethatreceivessizeofhittraceandcopydata,maybeNULL.

Seealso:Modifyhittrace,Runtracesize

Modifyhittrace

Functionadds,resets,removesorrestoresspecifiedrangeinthecombinedhit/runtracedatabuffer.Thisbuffercontainsflagsspecifyingwhichactionsshouldbeundertakenwhencorrespondingcommandisreached,don'tmixitwiththeruntracelogbufferthatcontainsresultsofruntrace.Ifnecessary,bufferiscreated.Returns0onsuccess(evenpartial)and-1onerror.

Warning:Settinghittraceorforcedruntraceondatamayhavedisastrouseffectsonyourprogram!

intModifyhittrace(ulongaddr0,ulongaddr1,intmode);

Parameters:

addr0-addressofthefirstbyteofthecoderangeintheaddressspaceofdebuggedapplication;

addr1-addressofthelastbyteofthecoderangeintheaddressspaceofdebuggedapplication(notincluded);

mode-actiontoperform,oneofthefollowing:

ATR_ADD Hittracespecifiedrange

ATR_ADDPROC Hittraceonlyrecognizedproceduresintherange

ATR_RESET MarkrangeasnottracedATR_REMOVE RemoverangeandbreakpointsATR_REMOVEALLDestroyrangeandbreakpointsATR_RESTORE RestorebreakpointsinmemoryATR_RTRADD HittracerangeandforceruntraceATR_RTRJUMPS HittraceandruntracejumpsonlyATR_RTRENTRY HittraceandruntraceentriesonlyATR_RTREMOVE RemovetracefromrangeATR_RTSKIP Skiprangefromruntrace

Seealso:Findhittrace,Runtracesize

Runtracesize

Returnsnumberofrecordsinruntracedata,includingrecordaddedduringinitialization,or0ifruntracedataisabsent.Thisfunctionisveryfast.

intRuntracesize(void);

Findprevruntraceip

Searchesfortheprevious(older)appearanceofcommandwithspecifiedEIPintheruntracebuffer,startingfromthespecifiedbackwardstep(notincludedinsearch).Returnsbackwardstepor-1ifcommandisnotintraceorifruntraceisinactive.

intFindprevruntraceip(ulongip,intstartback);

Parameters:

ip-addressofthecommandtosearch;

startback-backwardstepwherethesearchstarts.Thisstepisnotincludedinsearch.Usestartback=0tosearchfortheyoungestappearance.

Seealso:Findhittrace,Runtracesize,Findnextruntraceip,Getruntraceregisters

Findnextruntraceip

Searchesforthenext(younger)appearanceofcommandwithspecifiedEIPintheruntracebuffer,startingfromthespecifiedbackwardstep(notincludedinsearch).Returnsbackwardstepor-1ifcommandisnotintraceorifruntraceisinactive.

intFindnextruntraceip(ulongip,intstartback);

ip-addressofthecommandtosearch;

startback-backwardstepwherethesearchstarts.Thisstepisnotincludedinsearch.

Seealso:Findhittrace,Runtracesize,Findprevruntraceip,Getruntraceregisters

Getruntraceregisters

Extractsregistersthatarenbackstepsbackintheruntracedata(nback=0meansactualregisters)andoptionallyregistersonthepreviousstep(soonecancheckformodifications).Optionallyextractsoriginalcommandandcomment.Returns-1oferror,lengthofcommandifcmd!=NULLandoriginalcommandisavailableand0iforiginalcommandisabsent.Ifrecordcontainsskippedsequence,returns0andsetscmd[0]to0x01.

intGetruntraceregisters(intnback,t_reg*preg,t_reg*pold,char*cmd,char*comment);

Parameters:

nback-backwardstepinruntracebuffer,0meansactualstep;

preg-pointertot_regstructurethatreceivesregistersrestoredtothestateafterthiscommandwasexecuted;

pold-pointertot_regstructurethatreceivesregistersrestoredtothestatebeforethiscommandwasexecuted,canbeNULL;

cmd-bufferatleastMAXCMDSIZEbyteslongthatreceivesoriginalcommand,orNULL.IfrecordcontainsskippedsequenceandcmdisnotNULL,functionsetscmd[0]to0x01andreturns0;

comment-bufferatleastTEXTLENbyteslongthatreceivescommentfromtheruntracebuffer,canbeNULL.

Seealso:Runtracesize,Findprevruntraceip,Findnextruntraceip

Getruntraceprofile

Calculatesnumberoftimesthateachaddressinrangefromaddrtoaddr+size(notincluded)appearsintheruntracedata.Parameterprofilepointstoarrayofsizeelementsthatreceivesprofiledata.Returns0onsuccessorwhenruntracedataisunavailable,and-1onerror.Functioncanberatherslowifruntracedataislong.

intGetruntraceprofile(ulongaddr,ulongsize,ulong*profile);

Parameters:

addr-baseaddressoftheprofiledcode;

size-sizeoftheprofiledcode;

profile-pointertoarrayofsizedoublewordsthatreceivesprofiledata.

Seealso:Findhittrace,Runtracesize,Findprevruntraceip,Findnextruntraceip,Getruntraceregisters

Scrollruntracewindow

Selectsspecifiedlineandscrollsruntracewindowsothatselectionisvisible.Ifoption"SynchronizeCPUandRuntrace"isactive,Disassembleralsoscrollstothiscommand.

voidScrollruntracewindow(intback);

Parameters:

back-backwardstepinruntracebuffer,0meansactualstep.

Seealso:Runtracesize,Findprevruntraceip,Findnextruntraceip,Getruntraceregisters

Startruntrace

Reinitializestracedataandreallocatestracebuffer.Previoustraceisdeleted.Returns0onsuccessand-1onerror.

intStartruntrace(t_reg*preg);

Parameters:

preg-pointertoactualregistersthatwillbeusedastheoldestrecordintheruntracebuffer.FunctionfailsifpregisNULL.

Seealso:Runtracesize,Findprevruntraceip,Findnextruntraceip,Getruntraceregisters,Settracecondition

Deleteruntrace

Closesruntraceanddestroystracedata.

voidDeleteruntrace(void);

Seealso:Startruntrace,Runtracesize,Findprevruntraceip,Findnextruntraceip,Getruntraceregisters

Settracecondition

OllyDbgcanpauseruntraceonasetofconditions.Thisfunctionquicklysetspauseonexpression,onsuspiciouscommandand/oronEIPrangeanddeactivatespauseoncommand.

voidSettracecondition(char*cond,intonsuspicious,ulongin0,ulongin1,ulongout0,ulongout1);

Parameters:

cond-pointertocharacterstringcontainingexpression.Runtracewillpauseifexpressionisinvalidorestimatestonon-zerovalue;

onsuspicious-activates(1)ordeactivates(0)pauseonsuspiciouscommand;

in0,in1-'inrange'request.RuntracewillpauseifEIPisinthisrange(in1notincluded).Todisablepauseon'inrange',setbothin0andin1to0;

out0,out1-'outofrange'request.RuntracewillpauseifEIPisoutsidethisrangeorequalstoout1.Todisablepauseon'outofrange',setbothout0andout1to0.

Seealso:Startruntrace,Issuspicious

Createprofilewindow

Createsneworbringstotopexistingprofilewindowanddisplaysactualprofileforthespecifiedpieceofcode.Onlyoneprofilewindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.Notethatinordertoactualizeprofile,thisfunctionattemptstoallocatetemporarybufferofsize4*sizebytes,andwillfailifyouspecifytoolargeornon-contiguouscodeblock.

HWNDCreateprofilewindow(ulongbase,ulongsize);

base-baseaddressoftheprofiledcode;

size-sizeoftheprofiledcode.

Seealso:Startruntrace,Getruntraceprofile

Structurethatkeepsthevaluesofallrelevant80x86registers.Notethatlengthofthisstructureinversion1.10isincreasedby4bytes.Thismayleadtoincompatibilitieswithpreviousversions.

typedefstructt_reg{//Excerptfromcontext

intmodified;//Someregsmodified,updatecontext

intmodifiedbyuser;//Amongmodified,somemodifiedbyuser

intsinglestep;//Typeofsinglestep,SS_xxx

ulongr[8];//EAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI

ulongip;//Instructionpointer(EIP)

ulongflags;//Flags

inttop;//Indexoftop-of-stack

longdoublef[8];//Floatregisters,f[top]-topofstack

uchartag[8];//Floattags(0x3-emptyregister)

ulongfst;//FPUstatusword

ulongfcw;//FPUcontrolword

ulongs[6];//SegmentregistersES,CS,SS,DS,FS,GS

ulongbase[6];//Segmentbases

ulonglimit[6];//Segmentlimits

ucharbig[6];//Defaultsize(0-16,1-32bit)

ulongdr6;//DebugregisterDR6

ulongthreadid;//IDofthreadthatownsregisters

ulonglasterror;//Lastthreaderroror0xFFFFFFFF

intssevalid;//WhetherSSEregistersvalid

intssemodified;//WhetherSSEregistersmodified

charssereg[8][16];//SSEregisters

ulongmxcsr;//SSEcontrolandstatusregister

intselected;//Reportsselectedregistertoplugin

ulongdrlin[4];//DebugregistersDR0..DR3

ulongdr7;//DebugregisterDR7

}t_reg;

Members:

modified-non-zerovalueindicatesthatsomeregistersweremodifiedandOllyDbgshouldupdateCONTEXTstructureofthecorrespondingthreadbeforecontinuingexecution;

modifiedbyuser-amongmodifiedregisters,someregistersweremodifiedbyuser;

singlestep-usedinternallybyOllyDbg,donotmodifydirectly!

r-32-bitgeneral-purposeregistersEAX,ECX,EDX,EBX,ESP,EBP,ESI,EDI(inthelistedorder,useconstantsREG_xxxtoaccess);

ip-32-bitInstructionPointer(EIPregister);

flags-32-bitEFLAGSregister,donotmodifysingle-steptrapbit!

top-indexoftheregisterthatisthetopoftheFPUstack;

f-80-bitfloating-point/MMX/3DNow!registers;

tag-two-bittagsassociatedwithfloatingpointregisters;

fst-16-bitFPUstatusword;

fcw-16-bitFPUcontrolword;

s-segmentregistersES,CS,SS,DS,FS,GS(inthelistedorder,useconstantsSEG_xxxtoaccess);

base-baseaddressesofsegmentdescroptors;

limit-limitsofsegmentdescriptors;

big-defaultsegmentsize(0-16-bitsegment,seldominflatmode;1-32-bitsegment);

dr6-debugregisterdr6,pleasedonotmodify!

threadid-identifierofthethreadthatownsregisters;

lasterror-lasterrorinthethreadasreturnedbycalltoGetlastError,or-1(0xFFFFFFFF)ifexactvalueoftheerrorisunknown;

ssevalid-non-zeroifsseregcontainvaliddata;

ssereg-16-byteSSEregisters;

mxcsr-SSEcontrolandstatusregister;

selected-currentlyselectedregister,definedonlyift_regispassedtooneofODBG_Plugin...callbackfunctions,otherwiseundefined.ANDthisvaluewithRS_GROUPtoobtainthegroupofregistersRS_xxx;togetindexofregisterwithinthegroup,ANDitwithRS_INDEX.Forexample,code0013isageneral-purposeregisterEBX(0013&RS_GROUP=RS_INT,0013&RS_INDEX=REG_EBX);

drlin-debugregistersdr0..dr3,pleasedonotmodify!

dr7-debugregisterdr7,pleasedonotmodify!

Procedurefunctions

GroupoffunctionsthatfacilitatehandlingofproceduresrecognizedbyAnalyzer.

ulongFindprocbegin(ulongaddr);

ulongFindprocend(ulongaddr);

ulongFindprevproc(ulongaddr);

ulongFindnextproc(ulongaddr);

intGetproclimits(ulongaddr,ulong*start,ulong*end);

Findprocbegin

Returnsstartaddressoftheprocedurethatenclosesaddr,or0onerror,forexample,whenmoduleisnotanalyzedoraddresspointstonoprocedure.

ulongFindprocbegin(ulongaddr);

Parameters:

addr-addressofanycommandwithintheprocedure.

Seealso:Findprocend,Findprevproc,Findnextproc,Getproclimits

Findprocend

Returnsaddressofthelastcommandoftheprocedurethatenclosesaddr,or0onerror,forexample,whenmoduleisnotanalyzedoraddresspointstonoprocedure.

ulongFindprocend(ulongaddr);

Parameters:

addr-addressofanycommandwithintheprocedure.

Seealso:Findprocbegin,Findprevproc,Findnextproc,Getproclimits

Findprevproc

Returnsstartaddressoftheprocedurethatprecedesorenclosesaddr,or0onerror,forexample,whenmoduleisnotanalyzedoraddressdoesn'tpointtoexecutablecode.

ulongFindprevproc(ulongaddr);

Parameters:

addr-addressofreferencecommand.

Seealso:Findprocbegin,Findprocend,Findnextproc,Getproclimits

Findnextproc

Returnsstartaddressoftheprocedurethatisnexttoaddr,or0onerror,forexample,whenmoduleisnotanalyzedoraddressdoesn'tpointtoexecutablecode.

ulongFindnextproc(ulongaddr);

Parameters:

addr-addressofreferencecommand.

Seealso:Findprocbegin,Findprocend,Findprevproc,Getproclimits

Getproclimits

Calculateslimitsoftheprocedurethatincludesspecifiedaddress.Returns0onsuccessand-1onerror,forexample,whenmoduleisnotanalyzedoraddresspointstonoprocedure.

intGetproclimits(ulongaddr,ulong*start,ulong*end);

Parameters:

addr-addressofanycommandwithintheprocedure;

start-pointertovariablethatreceivesstartaddressoftheprocedure;

end-pointertovariablethatreceivesaddressofthelastcommandintheprocedure.

Seealso:Findprocbegin,Findprocend,Findprevproc,Findnextproc

Searchfunctions

Thefunctionsdescribedinthissectionhavelittlevalueforplugindeveloperandexportedmainlyforuseincommandlineplugin.Theysearchforspecifiedsortofdataanddisplayresultsinthereferencewindow.

intFindallcommands(t_dump*pd,t_asmmodel*model,ulongorigin,char*title);

intFindalldllcalls(t_dump*pd,ulongorigin,char*title);

intFindallsequences(t_dump*pd,t_extmodelmodel[NSEQ][NMODELS],ulongorigin,char*title);

intFindreferences(ulongbase,ulongsize,ulongaddr0,ulongaddr1,ulongorigin,intrecurseonjump,char*title);

intFindstrings(ulongbase,ulongsize,ulongorigin,char*title);

Findalldllcalls

Searchesforallcalls(includingindirect)todifferentmodulesfromthecodesectiondescribedbydumpstructure,placesthemintothereferencetableasasetoft_refrecordsanddisplaysinreferencewindow.Addressoforigin,ifnot0,isalsoincludedintothetable(markedasTY_ORIGIN).Returnsnumberoffoundreferencesor-1onerror.Noticethatthisfunctiondoesn'tworkonfiledump.

intFindalldllcalls(t_dump*pd,ulongorigin,char*title);

Parameters:

pd-pointertodumpdescriptorofcodesection;

origin-addressofsearchoriginor0ifnone.Searchorigingiveseasywaytoreturntoinitialpointafterbrowsingthroughthefounditems;

title-titleofreferencewindow.

Noteconcerningfunctionsthataccess.inifile

Ihateregistry!ManytimesIwasforcedtoreinstallsoftwarethatwasstillonmyharddiskonlybecauseregistrycrashedaftersomehazardousexperimentswithhardware,orbecauseIreinstalledWindowstogetridoftrashfromremovedinstallations.DoYOUknowwhichofyourpersonaldataresidesinregistry?Canyoucheckit?Canyoueasilybackupsettingsofsomeprogramandeasilyrestorethem?Oredit?Inmyopinion,theovercomplicationofthesoftwareinthelasttimeeithercomesfromthefactthatprogrammersfirstwriteandthenthink,orisa(rathersuccessfull)waytomakeproductinaccessibleforaconcurrent.Dixi.

Sampleprogram

Thisistheannotatedcodeofsamplebookmarkplugin.Iplaceitheresothatyoucangetquickhelponallreferencedfunctions.

////////////////////////////////////////////////////////////////////////////////

//SAMPLEPLUGINFOROLLYDBG//

//Thispluginallowstosetupto10codebookmarksusingkeyboardshortcuts//

//orpopupmenusinDisassemblerandthenquicklyreturntooneofthe//

//bookmarksusingshortcuts,popupmenuorBookmarkwindow.Bookmarks//

//arekeptbetweensessionsin.uddfile.//

////////////////////////////////////////////////////////////////////////////////

//VERYIMPORTANTNOTICE:COMPILETHISDLLWITHBYTEALIGNMENTOFSTRUCTURES

//ANDUNSIGNEDCHAR!

#include<windows.h>

#include<stdio.h>

#include<string.h>

#include<dir.h>

#include"plugin.h"

HINSTANCEhinst;//DLLinstance

HWNDhwmain;//HandleofmainOllyDbgwindow

charbookmarkwinclass[32];//Nameofbookmarkwindowclass

//OllyDbgsupportsandmakesextensiveuseofspecialkindofdatacollections

//calledsortedtables.Atableconsistsofdescriptor(t_table)anddata.All

//dataelementshassamesizeandbeginwitha3-dwordheader:address,size

//andtype.Tableautomaticallysortsitemsbyaddress,overlappingisnot

//allowed.Ourbookmarktableconsistsofelementsoftypet_bookmark.

typedefstructt_bookmark{

ulongindex;//Bookmarkindex(0..9)

ulongsize;//Sizeofindex,always1inourcase

ulongtype;//Typeofentry,always0

ulongaddr;//Addressofbookmark

}t_bookmark;

t_tablebookmark;//Bookmarktable

//Functionsinthisfileareplacedinmoreorless"chronological"order,

//i.e.orderinwhichtheywillbecalledbyOllyDbg.Thisrequiresforward

//referencing.

intBookmarksortfunc(t_bookmark*b1,t_bookmark*b2,intsort);

LRESULTCALLBACKBookmarkwinproc(HWNDhw,UINTmsg,WPARAMwp,LPARAMlp);

intBookmarkgettext(char*s,char*mask,int*select,t_sortheader*ph,intcolumn);

voidCreatebookmarkwindow(void);

//EntrypointintoapluginDLL.ManysystemcallsrequireDLLinstance

//whichispassedtoDllEntryPoint()asoneofparameters.Rememberit.

//PreferrablewayistoplaceinitializationsintoODBG_Plugininit()and

//cleanupinODBG_Plugindestroy().

BOOLWINAPIDllEntryPoint(HINSTANCEhi,DWORDreason,LPVOIDreserved){

if(reason==DLL_PROCESS_ATTACH)

hinst=hi;//Markplugininstance

return1;//Reportsuccess

//ODBG_Plugindata()isa"must"forvalidOllyDbgplugin.Itmustfillin

//pluginnameandreturnversionofplugininterface.Iffunctionisabsent,

//orversionisnotcompatible,pluginwillbenotinstalled.Shortname

//identifiesitinthePluginsmenu.Thisnameismax.31alphanumerical

//charactersorspaces+terminating'\0'long.Tokeeplifeeasyforusers,

//thisnameshouldbedescriptiveandcorrelatewiththenameofDLL.

extcint_exportcdeclODBG_Plugindata(charshortname[32]){

strcpy(shortname,"Bookmarks");//Nameofplugin

returnPLUGIN_VERSION;

//OllyDbgcallsthisobligatoryfunctiononceduringstartup.Placeall

//one-timeinitializationshere.Ifallresourcesaresuccessfullyallocated,

//functionmustreturn0.Onerror,itmustfreepartiallyallocatedresources

//andreturn-1,inthiscasepluginwillberemoved.Parameterollydbgversion

//istheversionofOllyDbg,useittoassurethatitiscompatiblewithyour

//plugin;hwisthehandleofmainOllyDbgwindow,keepitifnecessary.

//Parameterfeaturesisreservedforfutureextentions,donotuseit.

extcint_exportcdeclODBG_Plugininit(

intollydbgversion,HWNDhw,ulong*features){

//CheckthatversionofOllyDbgiscorrect.

if(ollydbgversion<PLUGIN_VERSION)

return-1;

//KeephandleofmainOllyDbgwindow.Thishandleisnecessary,forexample,

//todisplaymessagebox.

hwmain=hw;

//Initializebookmarkdata.Dataconsistsofelementsoftypet_bookmark,

//wereservespacefor10elements.Ifnecessary,tablewillallocatemore

//space,butinourcasemaximalnumberofbookmarksis10.Elementsdonot

//allocatememoryorotherresources,sodestructorisnotnecessary.

if(Createsorteddata(&(bookmark.data),"Bookmarks",

sizeof(t_bookmark),10,(SORTFUNC*)Bookmarksortfunc,NULL)!=0)

return-1;//Unabletoallocatebookmarkdata

//RegisterwindowclassforMDIwindowthatwilldisplayplugins.Please

//notethatformallythisclassbelongstoinstanceofmainOllyDbgprogram,

//notapluginDLL.Stringbookmarkwinclassgetsuniquenameofnewclass.

//Keepittocreatewindowandunregisteronshutdown.

if(Registerpluginclass(bookmarkwinclass,NULL,hinst,Bookmarkwinproc)<0){

//Failure!Destroysorteddataandexit.

Destroysorteddata(&(bookmark.data));

return-1;};

//Pluginsuccessfullyinitialized.Nowisthebesttimetoreportthisfact

//tothelogwindow.ToconformOllyDbglookandfeel,pleaseusetwolines.

//Thefirst,inblack,shoulddescribeplugin,thesecond,grayandindented

//bytwocharacters,bearscopyrightnotice.

Addtolist(0,0,"Bookmarkssamplepluginv1.10(plugindemo)");

//OllyDbgsavespositionsofpluginwindowswithattributeTABLE_SAVEPOSto

//the.inifilebutdoesnotautomaticallyrestorethem.Letusaddthis

//functionalityhere.Ikeepinformationwhetherwindowwasopenwhen

//OllyDbgterminatedalsoinollydbg.ini.Thisinformationissavedin

//ODBG_Pluginclose.ToconformtoOllyDbgnorms,windowisrestoredonly

//ifcorrespondingoptionisenabled.

if(Plugingetvalue(VAL_RESTOREWINDOWPOS)!=0&&

Pluginreadintfromini(hinst,"Restorebookmarkswindow",0)!=0)

Createbookmarkwindow();

return0;

//Tosortsorteddatabysomecriterium,onemustsupplysortfunctionthat

//returns-1iffirstelementislessthansecond,1iffirstelementis

//greaterand0ifelementsareequalaccordingtocriteriumsort.Usually

//thiscriteriumisthezero-basedindexofthecolumninwindow.

intBookmarksortfunc(t_bookmark*b1,t_bookmark*b2,intsort){

inti=0;

if(sort==1){//Sortbyaddressofbookmark

if(b1->addr<b2->addr)i=-1;

elseif(b1->addr>b2->addr)i=1;};

//Ifelementsareequalorsortingisbythefirstcolumn,sortbyindex.

if(i==0){

if(b1->index<b2->index)i=-1;

elseif(b1->index>b2->index)i=1;};

returni;

//Eachwindowclassneedsitsownwindowprocedure.Bothstandardandcustom

//OllyDbgwindowsmustpasssomesystemandOllyDbg-definedmessagesto

//Tablefunction().SeedescriptionofTablefunction()formoredetails.

LRESULTCALLBACKBookmarkwinproc(HWNDhw,UINTmsg,WPARAMwp,LPARAMlp){

inti,shiftkey,controlkey;

HMENUmenu;

t_bookmark*pb;

switch(msg){

//Standardmessages.Youcanprocessthem,but-unlessabsolutelysure-

//alwayspassthemtoTablefunction().

caseWM_DESTROY:

caseWM_MOUSEMOVE:

caseWM_LBUTTONDOWN:

caseWM_LBUTTONDBLCLK:

caseWM_LBUTTONUP:

caseWM_RBUTTONDOWN:

caseWM_RBUTTONDBLCLK:

caseWM_HSCROLL:

caseWM_VSCROLL:

caseWM_TIMER:

caseWM_SYSKEYDOWN:

Tablefunction(&bookmark,hw,msg,wp,lp);

break;//PassmessagetoDefMDIChildProc()

//Custommessagesresponsibleforscrollingandselection.User-drawn

//windowsmustprocessthem,standardOllyDbgwindowswithoutextra

//functionalitypassthemtoTablefunction().

caseWM_USER_SCR:

caseWM_USER_VABS:

caseWM_USER_VREL:

caseWM_USER_VBYTE:

caseWM_USER_STS:

caseWM_USER_CNTS:

caseWM_USER_CHGS:

returnTablefunction(&bookmark,hw,msg,wp,lp);

//IfwindowshouldsupportTABLE_ONTOP("Alwaysontop"mode),itmustpass

//WM_WINDOWPOSCHANGEDtoTablefunction().

caseWM_WINDOWPOSCHANGED:

returnTablefunction(&bookmark,hw,msg,wp,lp);

caseWM_USER_MENU:

menu=CreatePopupMenu();

//Findselectedbookmark.Anyoperationswithbookmarksmakesenseonly

//ifatleastonebookmarkexistsandisselected.Notethatsorteddata

//hasspecialsortindextablewhichisupdatedonlywhennecessary.

//Getsortedbyselection()doesthis;someothersorteddatafunctions

//don'tandyoumustcallSortsorteddata().Readdocumentation!

pb=(t_bookmark*)Getsortedbyselection(

&(bookmark.data),bookmark.data.selected);

if(menu!=NULL&&pb!=NULL){

AppendMenu(menu,MF_STRING,1,"&Follow\tEnter");

AppendMenu(menu,MF_STRING,2,"&Delete\tDel");};

//EvenwhenmenuisNULL,calltoTablefunctionisstillmeaningful.

i=Tablefunction(&bookmark,hw,WM_USER_MENU,0,(LPARAM)menu);

if(menu!=NULL)DestroyMenu(menu);

if(i==1)//FollowbookmarkinDisassembler

Setcpu(0,pb->addr,0,0,CPU_ASMHIST|CPU_ASMCENTER|CPU_ASMFOCUS);

elseif(i==2){//Deletebookmark

Deletesorteddata(&(bookmark.data),pb->index);

//Thereisnoautomaticalwindowupdate,doityourself.

InvalidateRect(hw,NULL,FALSE);};

return0;

caseWM_KEYDOWN:

//ProcessingofWM_KEYDOWNmessagesis-surprise,surprise-very

//similartothatofcorrespondingmenuentries.

shiftkey=GetKeyState(VK_SHIFT)&0x8000;

controlkey=GetKeyState(VK_CONTROL)&0x8000;

if(wp==VK_RETURN&&shiftkey==0&&controlkey==0){

//ReturnkeyfollowsbookmarkinDisassembler.

if(pb!=NULL)

elseif(wp==VK_DELETE&&shiftkey==0&&controlkey==0){

//DELkeydeletesbookmark.

if(pb!=NULL){

Deletesorteddata(&(bookmark.data),pb->index);

InvalidateRect(hw,NULL,FALSE);

//Addallthisarrow,homeandpageupfunctionality.

Tablefunction(&bookmark,hw,msg,wp,lp);

break;

caseWM_USER_DBLCLK:

//DoubleclickingrowfollowsbookmarkinDisassembler.

if(pb!=NULL)

return1;//Doubleclickprocessed

caseWM_USER_CHALL:

caseWM_USER_CHMEM:

//Somethingischanged,redrawwindow.

InvalidateRect(hw,NULL,FALSE);

return0;

caseWM_PAINT:

//PaintingofallOllyDbgwindowsisdonebyPainttable().Makecustom

//drawingonlyifyouhaveimportantreasonstodothis.

Painttable(hw,&bookmark,Bookmarkgettext);

return0;

default:break;

returnDefMDIChildProc(hw,msg,wp,lp);

//IfyoudefineODBG_Pluginmainloop,thisfunctionwillbecalledeachtime

//fromthemainWindowsloopinOllyDbg.Ifthereissomedebugeventfrom

//thedebuggedapplication,debugeventpointstoit,otherwiseitisNULL.Do

//notdeclarethisfunctionunnecessarily,asthismaynegativelyinfluence

//theoverallspeed!

extcvoid_exportcdeclODBG_Pluginmainloop(DEBUG_EVENT*debugevent){

//RecordtypesmustbeuniqueamongOllyDbgandallplugins.Thebestwayto

//assurethisistoregisterrecordtypebyOllDbg(OlehYuschuk).Registration

//isabsolutelyfreeofcharge,exceptforemailcosts:)

#defineTAG_BOOKMARK0x236D420AL//Bookmarkrecordtypein.uddfile

//Timetosavedatato.uddfile!ThisisdonebycallingPluginsaverecord()

//foreachdataitemthatmustbesaved.Global,process-orienteddatamust

//besavedinmain.uddfile(namedby.exe);module-relevantdatamustbe

//savedinmodulefiles.Don'tforgettosavealladdressesrelativeto

//module'sbase,sothatdatawillberestoredcorrectlyevenwhenmoduleis

//relocated.

extcvoid_exportcdeclODBG_Pluginsaveudd(t_module*pmod,intismainmodule){

ulongdata[2];

t_bookmark*pb;

if(ismainmodule==0)

return;//Savebookmarkstomainfileonly

pb=(t_bookmark*)bookmark.data.data;

for(i=0;i<bookmark.data.n;i++,pb++){

data[0]=pb->index;

data[1]=pb->addr;

Pluginsaverecord(TAG_BOOKMARK,2*sizeof(ulong),data);

//OllyDbgrestoresdatafrom.uddfile.Ifrecordbelongstoplugin,itmust

//processrecordandreturn1,otherwiseitmustreturn0topassrecordto

//otherplugins.Notethatmoduledescriptorpointedtobypmodcanbe

//incomplete,i.e.doesnotnecessarilycontainallinformations,especially

//thatfrom.uddfile.

extcint_exportcdeclODBG_Pluginuddrecord(t_module*pmod,intismainmodule,

ulongtag,ulongsize,void*data){

t_bookmarkmark;

if(ismainmodule==0)

return0;//Bookmarkssavedinmainfileonly

if(tag!=TAG_BOOKMARK)

return0;//Tagisnotrecognized

mark.index=((ulong*)data)[0];

mark.size=1;

mark.type=0;

mark.addr=((ulong*)data)[1];

Addsorteddata(&(bookmark.data),&mark);

return1;//Recordprocessed

//FunctionaddsitemseithertomainOllyDbgmenu(origin=PM_MAIN)ortopopup

//menuinoneofstandardOllyDbgwindows.Whenpluginwantstoaddownmenu

//items,itgathersmenupatternindataandreturns1,otherwiseitmust

//return0.Exceptforstaticmainmenu,pluginmustnotaddinactiveitems.

//Itemindicesmustrangein0..63.Duplicatedindicesareexplicitlyallowed.

extcint_exportcdeclODBG_Pluginmenu(intorigin,chardata[4096],void*item){

inti,n;

t_bookmark*pb;

t_dump*pd;

switch(origin){

//Menucreationisverysimple.Youjustfillindatawithmenupattern.

//Someexamples:

//0Aaa,2Bbb|3Ccc|,,-linearmenuwith3items,relativeIDs0,2and

//3,separatorbetweensecondandthirditem,last

//separatorandcommasareignored;

//#A{0Aaa,B{1Bbb|2Ccc}}-unconditionalseparator,followedbypopupmenu

//Awithtwoelements,secondispopupwithtwo

//elementsandseparatorinbetween.

casePM_MAIN://Pluginmenuinmainwindow

strcpy(data,"0&Bookmarks|1&About");

//Ifyourpluginismorethantrivial,IalsorecommendtoincludeHelp.

return1;

casePM_DISASM://PopupmenuinDisassembler

//Firstcheckthatmenuapplies.

pd=(t_dump*)item;

if(pd==NULL||pd->size==0)

return0;//Windowempty,don'tadd

//Startsecond-levelpopupmenu.

n=sprintf(data,"Bookmark{");

//Additem"Insertbookmarkn"iftherearefreebookmarksandsomepart

//ofDisassemblerisselected.NotethatOllyDbgcorrectlyinterpretes

//superfluoscommas,separatorsand,tosomeextent,missedbraces.

pb=(t_bookmark*)bookmark.data.data;

for(i=0;i<bookmark.data.n;i++)

if(pb[i].index!=(ulong)i)break;

if(i<10&&pd->sel1>pd->sel0)

n+=sprintf(data+n,"%i&Insertbookmark%i\tAlt+Shift+%i,",i,i,i);

//Additem"Deletebookmarkn"foreachavailablebookmark.Menu

//identifiersarenotnecessarilyconsecutive.

for(i=0;i<bookmark.data.n;i++){

n+=sprintf(data+n,"%iDeletebookmark%i,",pb[i].index+10,pb[i].index);

//Addseparatortomenu.

data[n++]='|';

//Additem"Gotobookmarkn"foreachavailablebookmark.Bookmarks

//setatselectedcommandarenotshown.

for(i=0;i<bookmark.data.n;i++){

if(pb[i].addr==pd->sel0)continue;

n+=sprintf(data+n,"%iGotobookmark%i\tAlt+%i,",

pb[i].index+20,pb[i].index,pb[i].index);

//Closepopup.Ifyouforgettodothis,OllyDbgwilltrytocorrect

//yourerror.

sprintf(data+n,"}");

return1;

default:break;//Anyotherwindow

return0;//Windownotsupportedbyplugin

//Thisoptionalfunctionreceivescommandsfrompluginmenuinwindowoftype

//origin.ArgumentactionismenuidentifierfromODBG_Pluginmenu().Ifuser

//activatesautomaticallycreatedentryinmainmenu,actionis0.

extcvoid_exportcdeclODBG_Pluginaction(intorigin,intaction,void*item){

t_bookmarkmark,*pb;

t_dump*pd;

if(origin==PM_MAIN){

switch(action){

case0:

//Menuitem"Bookmarks",createsbookmarkwindow.

Createbookmarkwindow();

break;

case1:

//Menuitem"About",displaysplugininfo.

MessageBox(hwmain,

"Bookmarkpluginv1.10\n"

"(demonstrationofplugincapabilities)\n"

"Bookmarkplugin",MB_OK|MB_ICONINFORMATION);

break;

default:break;

elseif(origin==PM_DISASM){

pd=(t_dump*)item;

if(action>=0&&action<10){//Insertbookmark

mark.index=action;

mark.size=1;

mark.type=0;

mark.addr=pd->sel0;

if(bookmark.hw!=NULL)InvalidateRect(bookmark.hw,NULL,FALSE);}

elseif(action>=10&&action<20){//Deletebookmark

pb=(t_bookmark*)Findsorteddata(&(bookmark.data),action-10);

if(pb!=NULL){

Deletesorteddata(&(bookmark.data),action-10);

if(bookmark.hw!=NULL)InvalidateRect(bookmark.hw,NULL,FALSE);

elseif(action>=20&&action<30){//Gotobookmark

pb=(t_bookmark*)Findsorteddata(&(bookmark.data),action-20);

if(pb!=NULL){

//StandardfunctionPainttable()makesmostofOllyDbgwindowsredrawing.You

//onlyneedtosupplyanotherfunctionthatpreparestextstringsand

//optionallycoloursthem.Caseofcustomwindowsisabitmorecomplicated,

//pleasereaddocumentation.

intBookmarkgettext(char*s,char*mask,int*select,

t_sortheader*ph,intcolumn){

ulongcmdsize,decodesize;

charcmd[MAXCMDSIZE],*pdecode;

t_memory*pmem;

t_disasmda;

t_bookmark*pb=(t_bookmark*)ph;

if(column==0){//Nameofbookmark

//Column0containsnameofbookmarkinform"Alt+n",wherenisthe

//digitfrom0to9.Mainlyfordemonstrationpurposes,Idisplayprefix

//"Alt+"ingrayedanddigitinnormaltext.Standardtablewindowsdo

//notneedtobotheraboutselection.

n=sprintf(s,"Alt+%i",pb->index);

*select=DRAW_MASK;

memset(mask,DRAW_GRAY,4);

mask[4]=DRAW_NORMAL;}

elseif(column==1)//Addressofbookmark

n=sprintf(s,"%08X",pb->addr);

elseif(column==2){//Disassembledcommand

//FunctionDisasm()requiresthatcallingroutinesuppliescodetobe

//disassembled.Readthiscodefrommemory.Firstdeterminepossible

//codesize.

pmem=Findmemory(pb->addr);//Findmemoryblockcontainingcode

if(pmem==NULL){

*select=DRAW_GRAY;returnsprintf(s,"???");};

cmdsize=pmem->base+pmem->size-pb->addr;

if(cmdsize>MAXCMDSIZE)

cmdsize=MAXCMDSIZE;

if(Readmemory(cmd,pb->addr,cmdsize,MM_RESTORE|MM_SILENT)!=cmdsize){

*select=DRAW_GRAY;returnsprintf(s,"???");};

pdecode=Finddecode(pb->addr,&decodesize);

if(decodesize<cmdsize)pdecode=NULL;

Disasm(cmd,cmdsize,pb->addr,pdecode,&da,DISASM_CODE,0);

strcpy(s,da.result);

n=strlen(s);}

elseif(column==3)//Comment

//Onlyuser-definedcommentsaredisplayedhere.

n=Findname(pb->addr,NM_COMMENT,s);

elsen=0;//sisnotnecessarily0-terminated

returnn;

//OllyDbgmakesmostofworkwhencreatingstandardMDIwindow.Pluginmust

//onlydescribenumberofcolumns,theirpropertiesandpropertiesofwindow

//asawhole.

voidCreatebookmarkwindow(void){

//Describetablecolumns.Notethatcolumnnamesarepointers,sostrings

//mustexistaslongastableitself.

if(bookmark.bar.nbar==0){

//Barstilluninitialized.

bookmark.bar.name[0]="Bookmark";//Nameofbookmark

bookmark.bar.defdx[0]=9;

bookmark.bar.mode[0]=0;

bookmark.bar.name[1]="Address";//Bookmarkaddress

bookmark.bar.mode[1]=0;

bookmark.bar.name[2]="Disassembly";//Disassembledcommand

bookmark.bar.mode[2]=BAR_NOSORT;

bookmark.bar.name[3]="Comment";//Comment

bookmark.bar.mode[3]=BAR_NOSORT;

bookmark.bar.nbar=4;

bookmark.mode=//Note:newoptionTABLE_ONTOP

TABLE_COPYMENU|TABLE_SORTMENU|TABLE_APPMENU|TABLE_SAVEPOS|TABLE_ONTOP;

bookmark.drawfunc=Bookmarkgettext;};

//Ifwindowalreadyexists,Quicktablewindow()doesnotcreatenewwindow,

//butrestoresandbringstotopexisting.Thisisthesimplestway,

//Newtablewindow()ismoreflexiblebutmorecomplicated.Idonotrecommend

//custom(plugin-drawn)windowswithoutveryimportantreasonstodothis.

Quicktablewindow(&bookmark,15,4,bookmarkwinclass,"Bookmarks");

//ThisfunctionreceivespossiblekeyboardshortcutsfromstandardOllyDbg

//windows.Ifitrecognizesshortcut,itmustprocessitandreturn1,

//otherwiseitreturns0.

extcint_exportcdeclODBG_Pluginshortcut(

intorigin,intctrl,intalt,intshift,intkey,void*item){

t_dump*pd;

t_bookmarkmark,*pm;

//PluginacceptsshortcutsinformAlt+xorShift+Alt+x,wherexisakey

//'0'..'9'.Shiftedshortcutsetsbookmark(onlyinDisassembler),

//non-shiftedjumpstobookmarkfromeverywhere.

if(ctrl==0&&alt!=0&&key>='0'&&key<='9'){

if(shift!=0&&origin==PM_DISASM&&item!=NULL){

//Setneworreplaceexistingbookmark.

pd=(t_dump*)item;

mark.index=key-'0';

mark.size=1;

mark.type=0;

mark.addr=pd->sel0;

if(bookmark.hw!=NULL)InvalidateRect(bookmark.hw,NULL,FALSE);

return1;}//Shortcutrecognized

elseif(shift==0){

//Jumptoexistingbookmark(fromanywindow).

pm=Findsorteddata(&(bookmark.data),key-'0');

if(pm==NULL)

Flash("Undefinedbookmark");

Setcpu(0,pm->addr,0,0,CPU_ASMHIST|CPU_ASMCENTER|CPU_ASMFOCUS);

return1;//Shortcutrecognized

return0;//Shortcutnotrecognized

//Functioniscalledwhenuseropensneworrestartscurrentapplication.

//Pluginshouldresetinternalvariablesanddatastructurestoinitialstate.

extcvoid_exportcdeclODBG_Pluginreset(void){

Deletesorteddatarange(&(bookmark.data),0,0xFFFFFFFF);

//OllyDbgcallsthisoptionalfunctionwhenuserwantstoterminateOllyDbg.

//AllMDIwindowscreatedbypluginsstillexist.Functionmustreturn0if

//itissafetoterminate.Anynon-zeroreturnwillstopclosingsequence.Do

//notmisusethispossibility!Alwaysinformuseraboutthereasonswhy

//terminationisnotgoodandaskforhisdecision!

extcint_exportcdeclODBG_Pluginclose(void){

//Forautomaticalrestoringofopenwindows,markin.inifilewhether

//Bookmarkswindowisstillopen.

Pluginwriteinttoini(hinst,"Restorebookmarkswindow",bookmark.hw!=NULL);

return0;

//OllyDbgcallsthisoptionalfunctiononceonexit.Atthismoment,allMDI

//windowscreatedbypluginarealreadydestroyed(andreceivedWM_DESTROY

//messages).Functionmustfreeallinternallyallocatedresources,like

//windowclasses,files,memoryandsoon.

extcvoid_exportcdeclODBG_Plugindestroy(void){

Unregisterpluginclass(bookmarkwinclass);

Destroysorteddata(&(bookmark.data));

Attachtoactiveprocess

AttachesOllyDbgtoactive(running)processwithknownprocessidentifier.Ifanotherprocessisdebugged,asksforpermissiontocloseit.Returns0onsuccessand-1onerror.

intAttachtoactiveprocess(intprocessid);

Parameters:

processid-identifierofrunningprocess.

Seealso:OpenEXEfile

Creatertracewindow

Createsneworbringstotopexistingwindowdisplayingruntracehistory.Onlyonesuchwindowmayexistatatime.ReturnshandleofthewindoworNULLonerror.

Demanglename

Demanglesorundecoratesname.CurrentlysupportsBorlandandMicrosoftmanglingschemes.Returns0ifnameisnotmangled(inthiscasebufferpointedtobyundecoratedisinvalidandprobablymodified)andlengthofunmanglednameonsuccess.Attention,noguaranteethatdemanglednameisunique!

intDemanglename(char*name,inttype,char*undecorated);

Parameters:

name-pointertomangledname;

type-typeofname.FunctiontreatsnamesoftypesNM_IMPORTandNM_IMPNAMEinaspecialway;

undecorated-pointertooutputbufferoflengthatleastTEXTLENcharacters.

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