Login or Register :: Home :: Search :: Your Account :: Forums :: Waraxe Advisories :: Tools :: November 17, 2024 Menu Home Logout Discussions Forums Members List IRC chat Tools Base64 coder MD5 hash CRC32 checksum ROT13 coder SHA-1 hash URL-decoder Sql Char Encoder Affiliates y3dips ITsec Md5 Cracker User Manuals AlbumNow Content Content Sections FAQ Top Info Feedback Recommend Us Search Journal Your Account User Info Welcome, Anonymous Nickname Password (Register) Membership: Latest: MichaelSnaRe New Today: 0 New Yesterday: 0 Overall: 9144 People Online: Visitors: 101 Members: 0 Total: 101 Full disclosure SEC Consult SA-20241112-0 :: Multiple vulnerabilities in Siemens Energy Omnivise T3000 (CVE-2024-38876, CVE-2024-38877, CVE-2024-38878, CVE-2024-38879) Security issue in the TX Text Control .NET Server for ASP.NET. SEC Consult SA-20241107-0 :: Multiple Vulnerabilities in HASOMED Elefant and Elefant Software Updater Unsafe eval() in TestRail CLI 4 vulnerabilities in ibmsecurity 32 vulnerabilities in IBM Security Verify Access xlibre Xnest security advisory & bugfix releases APPLE-SA-10-29-2024-1 Safari 18.1 SEC Consult SA-20241030-0 :: Query Filter Injection in Ping Identity PingIDM (formerly known as ForgeRock Identity Management) (CVE-2024-23600) SEC Consult SA-20241023-0 :: Authenticated Remote Code Execution in Multiple Xerox printers (CVE-2024-6333) APPLE-SA-10-28-2024-8 visionOS 2.1 APPLE-SA-10-28-2024-7 tvOS 18.1 APPLE-SA-10-28-2024-6 watchOS 11.1 APPLE-SA-10-28-2024-5 macOS Ventura 13.7.1 APPLE-SA-10-28-2024-4 macOS Sonoma 14.7.1 IT Security and Insecurity Portal www.waraxe.us Forum Index -> Assembler -> mmx strlen implementation View previous topic :: View next topic mmx strlen implementation Posted: Sat Feb 04, 2006 3:19 pm erg0t Valuable expert Joined: Apr 08, 2005 Posts: 55 Location: Uruguay Hi, yesterday I was iluminated and it ended in a very fast and small strlen implementation. It uses 2 general registers, two mmx registers, and has only one branch. Can be modified easly to scan for another bytes. Here is the fasm macro: macro strlen Param { mov ecx, Param pxor mm1,mm1 sub ecx, 8 bucle: add ecx, 8 movq mm0, [ecx] pcmpeqb mm0,mm1 pmovmskb eax,mm0 test eax, eax jz bucle sub ecx, Param bsf eax, eax add eax, ecx } Posted: Tue Feb 07, 2006 7:54 pm erg0t Valuable expert Joined: Apr 08, 2005 Posts: 55 Location: Uruguay I optimized a little the rutine. Benchmarks: old Quote: real 0m9.412s user 0m9.355s sys 0m0.025s new Quote: real 0m8.120s user 0m8.073s sys 0m0.019s new code: Quote: macro strlen Param { mov ecx, Param pxor mm1,mm1 bucle: movq mm0, [ecx] add ecx, 8 pcmpeqb mm0,mm1 pmovmskb eax,mm0 test eax, eax jz bucle bsf eax, eax lea eax, [ecx+eax-8] sub eax, Param } Posted: Thu Feb 09, 2006 12:00 am LINUX Moderator Joined: May 24, 2004 Posts: 404 Location: Caiman iluminated code personal note > pone el source del bot aka no seas careta Posted: Thu Feb 09, 2006 12:05 am erg0t Valuable expert Joined: Apr 08, 2005 Posts: 55 Location: Uruguay LINUX wrote: iluminated code personal note > pone el source del bot aka no seas careta todavia le falta xD mmx strlen implementation www.waraxe.us Forum Index -> Assembler You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum All times are GMT Page 1 of 1 All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 YearOldest FirstNewest First Select a forumSecurity Research by waraxe----------------General discussionHow to fixMetasploit relatedHash cracking requests----------------MD5 hashesAll other hashesHash related informationhttp://www.waraxe.us portal----------------SuggestionsCooperation proposalsSecurity bugs and issues in general----------------Newbies cornerSql injectionCross-site scripting aka XSSRemote file inclusionFull path disclosureShell commands injectionPhishing and Social EngineeringAll other security holesVarious software----------------PhpNukePostNukePhpBBXMB forumvBulletin BoardInvision Power Boarde107MamboJoomlaXOOPSM$ WindowsLinux worldAll other softwareCoppermine Photo GalleryProgramming languages----------------PhpMySqlPerlJavaJavascriptC and C++Visual BasicBorland Delphi and PascalPythonHTML and XMLAssemblerReverse engineering----------------Newbies cornerDisassemblingPHP script decode requestsMiscellaneous stuff----------------Future of the ITNanotechnologyFun cornerLinksTry2hack sitesProxy databaseDirect Downloads----------------ToolsTutorialsWordlistsRecycle Bin----------------Removed messagesOutdated posts Powered by phpBB © 2001-2008 phpBB Group

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