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07-16-2024, 07:06 AM
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#1
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LQ Newbie
Registered: Nov 2020
Posts: 24
Rep: 
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find target function in raw MIPS32 binary (Ghidra)
I'm analyzing the raw MIPS32 binary (memory dump) code in Ghidra. After importing the file, I did search strings and found the target instructions of interest. For example, offset address "00734cb4": I don't see functions there, 'No Function' in Decompiler window. I definitely missing something. I've selected the part of code, but how to decompile it and find linked functions?
Last edited by kosmo333; 07-21-2024 at 07:51 AM.
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07-17-2024, 02:16 AM
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#2
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Senior Member
Registered: Oct 2011
Location: Budapest
Distribution: Debian/GNU/Linux, AIX
Posts: 4,923
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You are examining a data segment: obviously there is no code in it. What is problem X, I mean where did this 00734cb address come?
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2 members found this post helpful.
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07-17-2024, 05:49 AM
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#3
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LQ Newbie
Registered: Nov 2020
Posts: 24
Original Poster
Rep:
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My mistype - the correct offset is 00734cb4, not 00734cb. I find the address '00734cb4' using Search > For Strings, "validate a given passowrd against all three passwords (10 Alphanumeric characters)". There are no label starting with `FUN_007` in Symbol Tree window.
Last edited by kosmo333; 07-17-2024 at 06:58 AM.
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07-17-2024, 06:03 AM
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#4
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Senior Member
Registered: Oct 2011
Location: Budapest
Distribution: Debian/GNU/Linux, AIX
Posts: 4,923
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As far as I know string literals don't carry information about the code that uses them.
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07-17-2024, 06:58 AM
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#5
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LQ Newbie
Registered: Nov 2020
Posts: 24
Original Poster
Rep:
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How I can find that function? By browsing FUN_ labels one by one from beginning to end?
Last edited by kosmo333; 07-17-2024 at 07:02 AM.
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07-17-2024, 08:26 AM
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#6
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Senior Member
Registered: Nov 2005
Distribution: Debian, Arch
Posts: 3,793
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The code itself should have a reference to that address. But it could be split in two (e.g., load upper 16 bits, then load lower 16 bits), so a bit tricky to search for. I'm not familiar with Ghidra, perhaps it has a some feature to help with this?
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07-17-2024, 12:44 PM
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#7
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Senior Member
Registered: Oct 2011
Location: Budapest
Distribution: Debian/GNU/Linux, AIX
Posts: 4,923
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Well, helping users to avoid the password-verification is not necessarily a priority for the developers.
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1 members found this post helpful.
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07-17-2024, 03:49 PM
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#8
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LQ Newbie
Registered: Nov 2020
Posts: 24
Original Poster
Rep:
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Quote:
Originally Posted by NevemTeve
Well, helping users to avoid the password-verification is not necessarily a priority for the developers.
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It's not my case. I own the device. |
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07-26-2024, 06:07 AM
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#9
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LQ Guru
Registered: May 2005
Location: boston, usa
Distribution: fedora-35
Posts: 5,325
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Quote:
Originally Posted by kosmo333
My mistype - the correct offset is 00734cb4, not 00734cb. I find the address '00734cb4' using Search > For Strings, "validate a given passowrd against all three passwords (10 Alphanumeric characters)". There are no label starting with `FUN_007` in Symbol Tree window.
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mī best gess: if rejjistər rs = rejjistər rt; then, set u trap exxepshun. |
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