FreeCalypso > hg > freecalypso-reveng
annotate arm7dis/README @ 185:a820d9f9adbf
leo-obj: started analyzing tpudrv.lib objects
| author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> | 
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| date | Mon, 11 Aug 2014 21:32:30 +0000 | 
| parents | c883e60df239 | 
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arm7dis: README and header comments added
 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 1 The present package is a basic standalone disassembler for the ARMv4T | 
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arm7dis: README and header comments added
 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 2 instruction set implemented on the ARM7TDMI CPU core, commonly used in classic | 
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arm7dis: README and header comments added
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changeset | 3 cellular phone baseband processors. The armdis utility interprets an arbitrary | 
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arm7dis: README and header comments added
 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 4 raw binary image (i.e., one being reverse-engineered) as 32-bit ARM | 
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arm7dis: README and header comments added
 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 5 instructions; thumbdis interprets the same image as 16-bit Thumb instructions. | 
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changeset | 6 | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 7 The form in which the disassembly output is presented is a look-and-feel copycat | 
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arm7dis: README and header comments added
 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 8 of GNU objdump: armdis is meant to replace | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 9 | 
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changeset | 10 objdump -b binary -m arm -EL -M reg-names-std -D unknown-firmware.bin | 
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changeset | 11 | 
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changeset | 12 and thumbdis is meant to replace | 
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changeset | 13 | 
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changeset | 14 objdump -b binary -m arm -EL -M reg-names-std -M force-thumb -D unknown-fw.bin | 
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changeset | 15 | 
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changeset | 16 Aside from sparing the operator from having to remember all those options | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 17 every single time, and aside from being an independent from-scratch | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 18 implementation (lean and mean, only knows how to disassemble those instructions | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 19 which are meaningful on ARM7TDMI), these tools have one other feature which | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 20 partly prompted me to write them: whenever *dis disassembles a PC-relative | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 21 ldr instruction, it shows the value pulled from the literal pool on that ldr | 
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changeset | 22 line. In the reverse engineering jobs I've had to do, it has been a very | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 23 valuable feature for me. | 
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changeset | 24 | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 25 Happy hacking, | 
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 Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff
changeset | 26 Spacefalcon the Outlaw | 
