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| 01:59.47 | jonwil | Does anyone have any resources on how to reverse engineer ARM Linux software? |
| 02:01.02 | roxfan | ida pro |
| 02:01.19 | roxfan | should handle most of stuff you encounter |
| 02:02.07 | roxfan | or you could try poor man's solution - objdump :) |
| 02:02.49 | jonwil | ep, I have IDA pro. But not that nice-looking ARM decompiler sadly :(. I am more looking for tutorials and tips on how to figure stuff out (specifically I am looking for resources on how to figure out how to call a library when you dont have a set of headers for it (i.e. figuring out function prototypes) |
| 02:03.17 | MonMotha | jonwil: just disassemble the function and see how many times it pops the stack, then what it does with them. |
| 02:03.25 | roxfan | get arm eabi docs and watch accesses to registers |
| 02:03.36 | MonMotha | failing that, run it, set a breakpoint on the function call, and examine the stack/registers |
| 02:03.51 | roxfan | e.g. if it uses r0 then it has at least one argument etc |
| 02:04.06 | MonMotha | and yes, when you disassemble, you check regs as well as stack, since ARM EABI passes args in registers |
| 02:04.27 | MonMotha | it may also help to find some place that calls the function and see what it stuffs into registers/the stack before it calls |
| 02:04.32 | jonwil | my target cant be easily debugged. Tanks tor the tips though :) |
| 02:04.34 | jonwil | thanks |
| 02:05.20 | MonMotha | brb |
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| 06:02.54 | MonMotha | purl seen cosmicpenguin |
| 06:02.54 | purl | cosmicpenguin <~nobody@207-114-132-30.static.twtelecom.net> was last seen on IRC in channel #edev, 70d 8h 36m 22s ago, saying: 'but the performance question was a new one for me'. |
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