ChanServ changed the topic of #asahi-re to: Asahi Linux: porting Linux to Apple Silicon macs | Hardware / boot process / firmware interface reverse engineering | WARNING: this channel (only) may contain binary reverse engineering discussion | RE policy: https://alx.sh/re (MANDATORY READ) | GitHub: https://alx.sh/g | Wiki: https://alx.sh/w | Logs: https://alx.sh/l/asahi-re
<rqou_> unrelated to AVD, but i just found that the AVE unit also has a co-coprocessor
<rqou_> the RTKit AVE firmware contains over a dozen Cortex-M3 sub-firmwares
<rqou_> that all do... something
<rqou_> look in the constructor for CAvePipeMcpu
<rqou_> it's not just DCP lol
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<Jamie[m]> lmao
<Jamie[m]> uh, what happened to kexts on ventura
<Jamie[m]> mine all just have signatures and plists, no binary
<Jamie[m]> are they only stored in the kernelcache now?
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<hmon[m]> related? but i cant find some binaries that used to be in private_framework
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<hmon[m]> perf counters ^
<marcan> Jamie[m]: probably available in the KDK?
<Jamie[m]> hm perhaps i had that before and forgot about it
<Jamie[m]> pretty sure i was definitely reing appleavd.kext straight out of /system/library/extensions though
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<rqou_> a not-insignificant amount of AVD logic seems to be related to handling "ADS" which (for complicated-to-describe-to-others blatant guessing reasons) i believe is related to FairPlay
<rqou_> (there's getFPADSCryptInfo and getKDADSCryptInfo functions, for one, as well as a dedicated "adsbuf" DART stream and a bunch of "ads" related debug messages in the firmware)
<rqou_> firmware properties 2, 3, and 4 might also all relate to encrypting things
<rqou_> unrelated to all of that, the kext seems to allocate an "InsnFifo" that the firmware then manages
<rqou_> not clear what that is or how it works yet
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