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Xblade Of Heaven
Master Cheater
 Reputation: 0
Joined: 16 Oct 2005
Posts: 395
Location: DEAD
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 Posted: Fri Sep 16, 2016 1:20 pm Post subject: Comparing Unicode String error |
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Hi guys, i have a small problem and i havent idea why.
I try cmp a UnicodeString:
This code crash the game... no idea why.
| Code: | push eax
mov eax,dword ptr[ecx]
or eax,eax
jz code
cmp word ptr[eax+4d8],'A'//"AShockPlayer" Unicode String
jne code
cmp word ptr[eax+4da],'S'
jne code
cmp word ptr[eax+4dc],'h'
jne code
cmp word ptr[eax+4de],'o'
jne code
cmp word ptr[eax+4e0],'c'
jne code
cmp word ptr[eax+4e2],'k'
jne code
cmp word ptr[eax+4e4],'P'
jne code
cmp word ptr[eax+4e6],'l'
jne code
cmp word ptr[eax+4e8],'a'
jne code
cmp word ptr[eax+4ea],'y'
jne code
cmp word ptr[eax+4ec],'e'
jne code
cmp word ptr[eax+4ee],'r'
jne code
MY CODE HERE
code:
pop eax |
and this another code no crash the game... the unicode string is correct, somebody can help me for see why game crash using the entire unicodestring comparation?
| Code: | push eax
mov eax,dword ptr[ecx]
or eax,eax
jz code
cmp word ptr[eax+4d8],'A'//"AShock" Unicode String
jne code
cmp word ptr[eax+4da],'S'
jne code
cmp word ptr[eax+4dc],'h'
jne code
cmp word ptr[eax+4de],'o'
jne code
cmp word ptr[eax+4e0],'c'
jne code
cmp word ptr[eax+4e2],'k'
jne code
MY CODE HERE
code:
pop eax |
regards!
_________________
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STN
I post too much
 Reputation: 43
Joined: 09 Nov 2005
Posts: 2676
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| Posted: Fri Sep 16, 2016 5:41 pm Post subject: |
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Maybe the pointer is invalid for the rest of the offsets (doesn't always contain the string). That'd be my guess
You probably don't need to compare the full string by the way depending on if it's a unique occurrence.
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sbryzl
Master Cheater
![]() Reputation: 6
Joined: 25 Jul 2016
Posts: 252
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| Posted: Fri Sep 16, 2016 6:23 pm Post subject: |
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Try using byt ptr instead and jumping backward. I don't know how your script is set up but I trivially used a return and textreader label incase your code label can't be moved.
| Code: |
return:
jmp code
textreader:
push eax
mov eax,dword ptr[ecx]
or eax,eax
jz return
cmp byte ptr[eax+4d8],'A'//"AShockPlayer" Unicode String
jne return
cmp byte ptr[eax+4da],'S'
jne return
cmp byte ptr[eax+4dc],'h'
jne return
cmp byte ptr[eax+4de],'o'
jne return
cmp byte ptr[eax+4e0],'c'
jne return
cmp byte ptr[eax+4e2],'k'
jne return
cmp byte ptr[eax+4e4],'P'
jne return
cmp byte ptr[eax+4e6],'l'
jne return
cmp byte ptr[eax+4e8],'a'
jne return
cmp byte ptr[eax+4ea],'y'
jne return
cmp byte ptr[eax+4ec],'e'
jne return
cmp byte ptr[eax+4ee],'r'
jne return
MY CODE HERE
code:
pop eax |
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kuntz
Cheater
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Joined: 29 Aug 2016
Posts: 44
Location: Canada
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| Posted: Fri Sep 16, 2016 6:39 pm Post subject: |
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It's important for us to know what line of code is causing the crash. Nothing in the code you posted is invalid, so it's impossible to say what the problem is.
You can try replacing the push/pop eax with pushad/popad but I doubt that is the issue.
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