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Attack
Cheater
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Joined: 21 Mar 2011
Posts: 46
Location: Canada
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 Posted: Mon Feb 02, 2015 11:42 am Post subject: Is this AA script alright? |
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So I am messing around with Jet Set Radio and the game is simple for me to work on the basics. I have found the "ammo" address. Going from there, I want to stop it from decreasing. The pointer goes rather random outside of levels and seems to (sometimes) crash the game if frozen between levels.
It is decreased in three different instances (for some reason), always using the same code. Two are triggered by different target sizes, the third seems to be rarely triggered.
So I wrote this script, but I don't know if there is a better, more efficient way of doing this?
| Code: | [ENABLE]
alloc(newmem,1024)
label(originalcode)
label(exit)
label(returnhere)
label(_can0)
registersymbol(_can0)
aobscan(can0,FF 8E C8 03 00 00 56)
label(_can1)
registersymbol(_can1)
aobscan(can1,FF 8E C8 03 00 00 57)
label(_can2)
registersymbol(_can2)
aobscan(can2,FF 8E C8 03 00 00 83)
newmem:
nop
originalcode:
//dec [esi+000003C8]
exit:
jmp returnhere
can0:
_can0:
jmp newmem
nop
can1:
_can1:
jmp newmem
nop
can2:
_can2:
jmp newmem
nop
returnhere:
[DISABLE]
dealloc(newmem)
_can0:
db FF 8E C8 03 00 00
_can1:
db FF 8E C8 03 00 00
_can2:
db FF 8E C8 03 00 00
unregistersymbol(_can0)
unregistersymbol(_can1)
unregistersymbol(_can2) |
Help is always appreciated. |
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panraven
Grandmaster Cheater
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Joined: 01 Oct 2008
Posts: 942
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| Posted: Mon Feb 02, 2015 12:37 pm Post subject: |
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Your only return one address, just after _can2,
So code cave from _can0 and _can1 also return to _can2, likely cause error behavior.
Try replace | Code: | (1)jmp newmem
...
(2)jmp returnhere |
with
| Code: | (1)call newmem
...
(2)ret |
As long as the ESP register is not referenced inside the code cave, it should be ok.
Or, if the codes save are not shared, you have to use seperated returnhere/newmem label (eg.newmem1, returnhere1 etc.)
If the modification is short enough, code cave may not necessary. the modification can be in place.
| Code: | label(_can0)
registersymbol(_can0)
aobscan(can0,FF 8E C8 03 00 00 56)
can0:
db 90 90 90 90 90 90 // 90 -- nop in assembler
registersymbol(_can1)
aobscan(can1,FF 8E C8 03 00 00 57)
can1:
db 90 90 90 90 90 90
registersymbol(_can2)
aobscan(can2,FF 8E C8 03 00 00 83)
can2:
db 90 90 90 90 90 90 |
Last edited by panraven on Mon Feb 02, 2015 12:45 pm; edited 2 times in total |
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Attack
Cheater
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Joined: 21 Mar 2011
Posts: 46
Location: Canada
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| Posted: Mon Feb 02, 2015 12:41 pm Post subject: |
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That was pretty fast. I've actually improved on it already. That said, your input makes so much sense and will be useful down the road. I was causing an infinite loop on certain in game actions. I'm super tired as I decided to mess with this instead of sleep...
| Code: | [ENABLE]
aobscan(can0,FF 8E C8 03 00 00 56)
registersymbol(can0)
aobscan(can1,FF 8E C8 03 00 00 57)
registersymbol(can1)
aobscan(can2,FF 8E C8 03 00 00 83)
registersymbol(can2)
can0:
db 90 90 90 90 90 90
can1:
db 90 90 90 90 90 90
can2:
db 90 90 90 90 90 90
[DISABLE]
can0:
db FF 8E C8 03 00 00
unregistersymbol(can0)
can1:
db FF 8E C8 03 00 00
unregistersymbol(can1)
can2:
db FF 8E C8 03 00 00
unregistersymbol(can2) |
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