What is the difference between using IOCTL to write/read IO ports vs. modifying IOPM and using _INP/OUTP_ ??
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From: Maxim S. Shatskih on 9 Sep 2009 04:17 Looking at disassembly of READ_PORT_UCHAR does the same :-) -- Maxim S. Shatskih Windows DDK MVP maxim(a)storagecraft.com http://www.storagecraft.com "Alberto" <moreira(a)terarecon.com> wrote in message news:bfc1f718-d7fd-421a-8f09-d5f783561821(a)y10g2000prg.googlegroups.com... Doing the machine code directly eliminates one level of uncertainty. :-) Alberto. On Sep 3, 2:32 pm, "Maxim S. Shatskih" <ma...(a)storagecraft.com.no.spam> wrote: > >__asm > >{ > > mov dx,yourportaddress > > in al,dx; > > } > > Same as READ_PORT_UCHAR > > -- > Maxim S. Shatskih > Windows DDK MVP > ma...(a)storagecraft.comhttp://www.storagecraft.com
From: Alberto on 10 Sep 2009 10:29
I know. But this is a personal trait of mine, I do not like to disassemble other people's code. I very seldom do it, except when I have to plant a hook, and even then, I look at it as an amorphous instruction sequence and I don't pay much attention to its semantics beyond what I need to actually plant the hook. In fact, I do not like to use any code if I do not have full control over its source! Alberto. On Sep 9, 4:17 am, "Maxim S. Shatskih" <ma...(a)storagecraft.com.no.spam> wrote: > Looking at disassembly of READ_PORT_UCHAR does the same :-) > > -- > Maxim S. Shatskih > Windows DDK MVP > ma...(a)storagecraft.comhttp://www.storagecraft.com > > "Alberto" <more...(a)terarecon.com> wrote in messagenews:bfc1f718-d7fd-421a-8f09-d5f783561821(a)y10g2000prg.googlegroups.com... > > Doing the machine code directly eliminates one level of > uncertainty. :-) > > Alberto. > > On Sep 3, 2:32 pm, "Maxim S. Shatskih" > > > > <ma...(a)storagecraft.com.no.spam> wrote: > > >__asm > > >{ > > > mov dx,yourportaddress > > > in al,dx; > > > } > > > Same as READ_PORT_UCHAR > > > -- > > Maxim S. Shatskih > > Windows DDK MVP > > ma...(a)storagecraft.comhttp://www.storagecraft.com- Hide quoted text - > > - Show quoted text - |