/explore
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cpu.land | ||
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krinkinmu.github.io
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| | | | | I'm continuing my exploration of the AArch64 architecture and this time I will touch on the AArch64 priviledge levels. Note that AArch64 priviledge model is not exactly the same as the previous iterations of ARM. While there are plenty of similarities, and there is a level of backward compatibility, at the same time, there are some differences as well. So do not assume that things covered here will work the same way for all ARMs. Finally, I assume that you're familiar with general GNU Assembler synatax or willing to figure things out as you go. Familiarity with ARM assmebly language will help, though I try to explain all the things I use. As always the code is available on GitHub. | |
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lupyuen.org
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| | | | | We're porting Apache NuttX RTOS to Pine64's Star64 JH7110 RISC-V SBC... And we see interesting issues with RISC-V Privilege Levels and 16550 UART Registers | |
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dayzerosec.com
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| | | | | Over the last year or so, I've been working with the OpenOrbis team to develop a toolchain for building homebrew for the PS4, and one of the challenges we faced was porting a proper libc to the console. This article dives into some of the interesting lessons learned while porting MUSL to the PS4. | |
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www.lukas-barth.net
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| | | If you build an application that uses large, contiguous amounts of memory, it can increase your performance if you allocate this memory in so-called huge pages. Linux offers you two ways of doing that - a legacy way and a modern way. This article describes the modern way of using huge pages, so called transparent huge pages (THP) and applies the techniques from a previous article to verify that we actually got huge pages. The article starts by giving a super-short recap on how paging works and why huge p... | ||
