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compare register with value stored in allocated memory

 
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Meiyoh
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Joined: 14 Mar 2015
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PostPosted: Mon May 03, 2021 5:45 pm    Post subject: compare register with value stored in allocated memory Reply with quote
Hello i am trying to compare

rbx with the value of registered symbol

so example

cmp [rbx+0C],_HealthValue
je ...........

lets say Health value is 1500 so how do i make it compare so i can freely change health and based on it the opcode jumps to other stuff ?


thanks
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Dark Byte
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PostPosted: Tue May 04, 2021 1:34 am    Post subject: Reply with quote
No, a registered symbol is only valid at the time of assembling, it does not update after it has been assembled

What you can do is allocate memory on the target process, get a registered symbol for that address and then read the value from there

e.g
Code:

push rax
mov eax,[_HealthValueAddress]
cmp [rbx+0C],eax
pop rax
je ...........

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Meiyoh
Master Cheater
Reputation: 1

Joined: 14 Mar 2015
Posts: 402
PostPosted: Tue May 04, 2021 2:01 am    Post subject: Reply with quote
Dark Byte wrote:
No, a registered symbol is only valid at the time of assembling, it does not update after it has been assembled

What you can do is allocate memory on the target process, get a registered symbol for that address and then read the value from there

e.g
Code:

push rax
mov eax,[_HealthValueAddress]
cmp [rbx+0C],eax
pop rax
je ...........


I always forget that i have first to somehow convert it to register...thus eax.
THANKS ERIC!spaghetti monsterbless you!
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