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riverwest
Newbie cheater
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Joined: 05 May 2019
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 Posted: Mon May 06, 2019 5:55 am Post subject: Self-referencing address, no static address? |
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A simple question to pose; when doing a search to find a static address, I step through pointer to pointer. In my discovery, I find an address that when running "Find out what accesses this address" only returns itself.
What does this mean? Have I gone down the wrong pointer path, do all pointers eventually return a static address or should I be taking a different approach?
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Dark Byte
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Location: The netherlands
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| Posted: Mon May 06, 2019 6:00 am Post subject: |
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let's say you have address 12345678
you use find what accesses 12345678 and you get as instruction:
that means that the offset to get to the address is 0
12345678 -0 is 12345678,
so then scan for a memory address that holds the value 12345678 and go from there
Nothing weird about it, besides that the address and value are the same
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Also, there is a case like
again, the offset is 0, and everything is as it should, BUT, the value at ESI is wrong. Ignore the value at ESI as it has been overwritten (will hold the value pointed at by the original ESI, just ignore it). And besides, you don't need to look at that value anyhow, as you already know the offset, and that was the main purpose of what you're doing
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riverwest
Newbie cheater
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Joined: 05 May 2019
Posts: 14
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| Posted: Mon May 06, 2019 6:24 am Post subject: |
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| Dark Byte wrote: | let's say you have address 12345678
you use find what accesses 12345678 and you get as instruction:
that means that the offset to get to the address is 0
12345678 -0 is 12345678,
so then scan for a memory address that holds the value 12345678 and go from there
Nothing weird about it, besides that the address and value are the same
---
Also, there is a case like
again, the offset is 0, and everything is as it should, BUT, the value at ESI is wrong. Ignore the value at ESI as it has been overwritten (will hold the value pointed at by the original ESI, just ignore it). And besides, you don't need to look at that value anyhow, as you already know the offset, and that was the main purpose of what you're doing |
I'm thinking it best-describes your option 2, as when I search for the value in [7FFB....090] it does not return any results. In fact the memory region seems to disappear when I start to disassemble that address! Weird.
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