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The NX bit is not just about security | purplesyringa's blog
Web Content

The NX bit is not just about security | purplesyringa's blog

Interesting · purplesyringa.moe · generic

While I’m taking a short break from low-level programming, here’s a story by a friend of mine, Sonya, about debugging a seemingly impossible bug in ARM code. This bug hunting saga started several months ago. While developing a bare-metal hypervisor on ARM64 for postmarketOS, I hit a strange bug: if I enabled the CTR_EL0 intercept (which was the whole purpose of the HV, so could not be skipped), the phone would randomly lock itself up. After a few seconds, the watchdog kicked in and reset the sys

TypeWeb Page
Domainpurplesyringa.moe
Providergeneric
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