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It would be possible, though very difficult, to turn the OS into a staging bootloader, and load another OS bare-metal from there. Still insanely difficult thoug
by sudosysgen 5y ago
It would be possible, though very difficult, to turn the OS into a staging bootloader, and load another OS bare-metal from there. Still insanely difficult though.
- svenpeter 5y agoUsually, once you can run code in kernel mode it’s just a matter of bringing the hardware back to a sane state. Unfortunately, “just” running code in kernel mode is incredibly hard on the iPad. There’s e.g. a hardware mitigation that turns a memory region to read-only and also only allows kernel code to run from this region. This mitigation is locked down and cannot be disabled once XNU is running on the iPad (http://siguza.github.io/KTRR/ http://siguza.github.io/KTRR/). On top of that page tables are also protected by a “kernel within the kernel” (https://blog.svenpeter.dev/posts/m1_sprr_gxf https://blog.svenpeter.dev/posts/m1_sprr_gxf) Getting past all that is going to be very hard if not impossible.
- azalemeth 5y agoI thought the first-generation iPad pro was checkra1n-compatible? Isn't checkm8 a bootloader exploit?
- somebody_amzn 5y agoYes the first gen iPad Pro can, and the second generation one too. The target user base for Linux on those might be too small though.