NT 4.0, .NET 1.1, and INTLFXSR.SYS problems
Here is the code from a disassembly of INTLFXSR.SYS with symbols:
As for the .NET Framework 1.1 problems, the way to determine if SSE is supported is to first use CPUID to determine if the SSE bit is set. But there is also an extra step. Without CR4.OSFXSR set, SSE instructions will cause #UD. This can be caught on Windows as a SEH exception. My guess is that .NET 1.1 is not doing that, which is why it crashes without INTLFXSR.SYS properly loaded.
.text:000102A0 ; __stdcall FxsrGetProcessorFeatures() .text:000102A0 public _FxsrGetProcessorFeatures@0 .text:000102A0 _FxsrGetProcessorFeatures@0 proc near ; CODE XREF: DriverEntry(x,x)+61 p .text:000102A0 push edi .text:000102A1 push esi .text:000102A2 push ebx .text:000102A3 pushf .text:000102A4 pop eax .text:000102A5 push eax .text:000102A6 mov ecx, eax .text:000102A8 xor eax, 40000h .text:000102AD push eax .text:000102AE popf .text:000102AF pushf .text:000102B0 pop eax .text:000102B1 cmp ecx, eax .text:000102B3 jz short cpu_is_i386 .text:000102B5 mov eax, ecx .text:000102B7 xor eax, 200000h .text:000102BC push eax .text:000102BD popf .text:000102BE pushf .text:000102BF pop eax .text:000102C0 cmp ecx, eax .text:000102C2 jz short other_cpu .text:000102C4 mov eax, 0 .text:000102C9 cpuid .text:000102CB cmp eax, 3 .text:000102CE jg short cpu_identified .text:000102D0 mov _VerifyIntel, ebx .text:000102D6 mov dword_106C4, edx .text:000102DC mov dword_106C8, ecx .text:000102E2 lea esi, _VerifyIntel .text:000102E8 lea edi, _GenuineIntel ; "GenuineIntel" .text:000102EE mov ecx, 0Ch .text:000102F3 repe cmpsb .text:000102F5 jnz short other_cpu .text:000102F7 mov eax, 1 .text:000102FC cpuid .text:000102FE mov eax, edx .text:00010300 jmp short cpu_identified .text:00010302 ; --------------------------------------------------------------------------- .text:00010302 .text:00010302 other_cpu: ; CODE XREF: FxsrGetProcessorFeatures()+22 j .text:00010302 ; FxsrGetProcessorFeatures()+55 j .text:00010302 mov eax, 0 .text:00010307 jmp short cpu_identified .text:00010309 ; --------------------------------------------------------------------------- .text:00010309 .text:00010309 cpu_is_i386: ; CODE XREF: FxsrGetProcessorFeatures()+13 j .text:00010309 mov eax, 0 .text:0001030E .text:0001030E cpu_identified: ; CODE XREF: FxsrGetProcessorFeatures()+2E j .text:0001030E ; FxsrGetProcessorFeatures()+60 j ... .text:0001030E popf .text:0001030F pop ebx .text:00010310 pop esi .text:00010311 pop edi .text:00010312 retn .text:00010312 _FxsrGetProcessorFeatures@0 endpIf you know x86 assembly, you will notice that it relies on a GenuineIntel CPU and for CPUID leaf 0 to return a value less than 3.
As for the .NET Framework 1.1 problems, the way to determine if SSE is supported is to first use CPUID to determine if the SSE bit is set. But there is also an extra step. Without CR4.OSFXSR set, SSE instructions will cause #UD. This can be caught on Windows as a SEH exception. My guess is that .NET 1.1 is not doing that, which is why it crashes without INTLFXSR.SYS properly loaded.
great
ReplyDeletecyber threat monitoring
ReplyDeleteCyber Threat Monitoring. Detection is only half the equation. The market is saturated with monitoring solutions and automated tools that privilege technology ...
Hi Nice Post,
ReplyDeleteAmolatina.com website came into existence in 1993. The main objective behind establishing this dating site is to help singles around the world to find a dream girl or boy for dating online. If you are
To know more about russian brides.com
Hi Nice Post,
ReplyDeleteHow do you understand if you can trust an online casino USA? Sometimes you are in a dilemma whether to subscribe or not because you never did, and you don’t know if you can trust the online casino’s sites. A quick study on the internet can provide you all the information you want very quickly. Not … Continue reading "Guide For Best Online Casinos list No Deposit Bonus"
To know more about no deposit bonus
This comment has been removed by the author.
ReplyDeleteIs 1337x safe and legal to watch movies and TV shows?
ReplyDelete1337x site is another pirated movie providing site that leaks pirated contents. Again, this site is an illegal one browsing through which becomes a crime in India. Users are recommended not to use this site and shift to the legal alternatives for their entertainment. This site hosts several movies of almost all languages like other torrent sites. Movie categories found in this site include Tamil HD movies, Telegu movies free downloading, Bollywood dubbed, Hollywood dubbed, old movies, etc. It primarily leaks the latest movies in HD resolution making it available to viewers for free streaming and downloading
Thanks for sharing these informative articles, keep sharing.
ReplyDeleteCRM software from Virginia is the most effective choice to ensure that you are successful in marketing by 2021. Why is this? It's simple. It allows marketers to be competitive in a highly competitive market. This is the main reason behind the rapid expansion in the B2B industry in the past few years.
To be honest I found very helpful information on your blog, Thanks for providing us such Information. For more information visit this site: anastasia dating site
ReplyDeleteI like this content very much. I need like this content for Dating niche. For more information visit this site: chinalove.com
ReplyDeleteI like this content very much. I need like this content for Dating niche. For more information visit this site: arabiandate reviews
ReplyDeleteI really thank you for that great post and Please add a more new post. Do well...! For more information visit this site: chinalove.com reviews
ReplyDeleteI like this content very much. I need like this content for Dating niche. For more information visit this site: russianbrides.com scam
ReplyDeleteI like this content very much. I need like this content for Dating niche. For more information visit this site: Types of Girls You Should Avoid
ReplyDeleteI like this content very much. I need like this content for Dating niche. For more information visit this site: Young Ladies
ReplyDeleteThis comment has been removed by the author.
ReplyDeletestagasFid_do_Reno Christina Cooper https://wakelet.com/wake/7Qv65jnylq52JsaeCoaTx
ReplyDeletetuturazin
pressigastpo_Saint Paul Melissa Buzicky link
ReplyDeletelink
https://colab.research.google.com/drive/1RRw-b1Hl4Ae8Tv8RgLzZeQhoIIp170Zp
click here
naspontbima
Vadvenqui-ko Ean Cummings Site
ReplyDeleteKaspersky AntiVirus
Corel VideoStudio Pro
studunansu
sitiYquo_re_1990 Keith Carouthers click here
ReplyDeleteLink
essoifracal
If you're familiar with x86 assembly, you'll notice it depends on a GenuineIntel CPU and CPUID leaf 0 returning a value less than 3. Check out the best fit-out company in Dubai for exceptional interior solutions!
ReplyDeleteRight Angle HTX offers comprehensive landscaping services houston tx including custom landscape design, hardscaping, and outdoor lighting. They focus on sustainable, innovative solutions to create functional and aesthetically pleasing outdoor spaces.
ReplyDeletevilla renovation companies dubai specialize in transforming luxury homes, offering services that enhance both aesthetics and functionality. They handle everything from structural changes to interior design, ensuring modern, high-quality finishes.
ReplyDeletebest Italian restaurant in Abu Dhabi, offering a diverse menu of authentic pastas, pizzas, and more. With its cozy ambiance and commitment to quality, it’s a top choice for those seeking a genuine Italian dining experience in the city.
ReplyDeletefoundation crack repair in stony plain is critical for preventing water infiltration and preserving a home's structural integrity. Timely repairs help avoid further damage and protect against costly long-term issues.
ReplyDeleteEpimedium Honey Dubai is a highly sought-after product, known for its potential to enhance libido, energy, and overall vitality. Blending natural honey with the Epimedium plant, it's used as a health supplement and enjoyed for its rich flavor. This honey is popular among those seeking a natural boost to their wellness.
ReplyDelete