EFIDynoTuning Forum

BOOSTEDEVERYTHING wrote: ↑2024 Aug 26, 08:14 Ah, Ok. Just making sure I understand why. Thanks. I went through this one like you instructed me to go through the other and kept adding the scan commands for all of the areas that were not disassembled by SAD.

Add scan commands for subroutines only. Use other commands for other binary values.

So, If I run into this again, If I find that an area that is not disassembled by SAD, ends up being one of the above, I should delete the added scan commands and just ignore the code that was not disassembled?

Yes scan commands should be removed if valid subroutines are not discovered.
Scan commands should not have been commanded in the first place for many of those I've said to delete.
If it is a subroutine it needs to be disassembled automatically or with SCA...or COD.
If it is NOT a subroutine then other commands need to be applied to correctly identify the binary values.
You can get false positives for subroutines if command are applied scatter gun style.

All fill, NOT a Sub, use FIL.


Interrupt vector list, NOT a Sub. SAD has done it automatically.

These addresses are operands to opcodes. Scan should start with the opcode IF needed.
Scan is not needed as SAD finds them automatically.

Scan is not needed as SAD finds this automatically.

Fill use the fill command.

Part of a structure that is looped through
SAD has found the words at the start of the structure and the Sub that loops through the structure is adjacent.
As the user you need to look for f6fc being used as an address in a Sub then work out what the Sub does.
Use STR, SYM, and WOR commands to identify the binary values.
Fill

Same explanation as previous structure.
Part of the VID block, NOT a Sub.

Also, is there an easy way to determine what areas are structures and vectors? Still a bit confused by those.

Structure are blocks of binary values that may be bits, bytes, words, addresses, etc.
They are not functions, tables or subroutines.
A vector list is a type of structure containing subroutine addresses, but a VEC command is more appropriate.
A vector list is a list of subroutine addresses.

Hopefully a little clearer now. I suspect address modes might still provide some confusion for you as well, but you need to read the manuals and look at uses of each until they make sense.

BOOSTEDEVERYTHING wrote: ↑2024 Aug 26, 08:37 Also. I found that SAD does not like a certain area of this code so I had to keep trying subsequent lines of code for it to start a scan, Is there a reason why or is it just a bug of some kind?

Code: Select all

SCA 855FF     # SAD V4.07.16B HAS PROBLEM WITH 855FC

You should scan from the Sub start address 855F0, though SAD comes up with this without a SCAN command for that Sub.
If you are trying to scan for a Sub from the Arg 855FC you will get interesting results.

I will review the address modes section again. You are correct that they are not very clear for me yet. Odd that you are getting SAD to disassemble sections that I added SCA commands for, as I went through and only added what SAD was not disassembling automatically for me. Maybe I will go back through and comment them all out and try again.

I ran SAD against a basic DIR with your scan list less those above I said to delete. If you have missed subroutines with your DIR and excess scan commands deleted, then there is some other incorrect command in your DIR.

Delete just those above not all.

Ok, Thank you. Will do and go back through and make sure everything looks to be disassembled correctly.

Where would I get a DMR file from and What is it for or from? Is it an SCT based file or is it something that Ford uses to locate PIDS?

The ones I have come from the openeec github repository.

They are ford files, possibly from IDS or something like that.

Oh. Maybe I’ll take a look on my ids and see if I can track them down. I also have access to a couple of older ngs cards. If I can find something to hook to a computer to read them maybe there will be something on those.

Could you please post a DMR file or maybe email me one so I can see what I am looking for exactly? I can not seem to find anything on the openeec project about dmr files at all.

Thanks, after looking through everything I think I found the files but am pretty sure they are encrypted or maybe just a format I do no have any idea of looking at. I am pretty sure they are stored as .TML files. I have looked around for different programs to open the files but they all come out gibberish.