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 Forums >>  IDA Pro  >>  Disassembling PowerPC with IDApro 4.8

Topic created on: October 19, 2005 15:04 CDT by Scott .

I have loaded a PowerPC binary into IDApro V 4.8 and have an instruction that appears to have been disassembled incorrectly.

The hex of the instruction is 63 DE 00 00 and the menomic returned by IDA is mr %r30,%r30.  

The binary of 63 is 01100011 with the first 6 bits being 011000 this is the ori instruction according to the IBM PowerPC Programming Environments PDF "6xx_pem.pdf".

Has anyone run into this.

Thanks

Scott

  hdm     October 19, 2005 17:50.16 CDT
I think its covered in one of the PPC books I read -- ambiguity between vendors. Any chance its an ori that has the same return values as a mr r30, r30 (ori with zero for instance).

  EggHead     August 24, 2013 06:31.30 CDT
> The hex of the instruction is 63 DE 00 00 and the menomic returned by IDA is mr %r30,%r30.  

You can check encoding/decoding of PowerPC instrucions here:
http://demono.ru/online-PpcDecoder/onlinePage.aspx

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