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There's a document in there about pointer masking: https://github.com/riscv/riscv-j-extension/blob/master/point...
It seems like the objective of this is to implement different access privileges... but why do you need specialized instructions for this? This is typically done by the OS and memory protection. The pointer masking extension would be to have multiple levels of privilege within a single process? I'm assuming that this is to protect the JIT from a JITted program? Except it's not completely safe, because there might still be bugs in the JIT that could allow messing with the pointer tags. Struggling to think of a real use case.
Not since Vista.
https://docs.microsoft.com/en-us/cpp/build/reference/kernel-...
> Creates a binary that can be executed in the Windows kernel. The code in the current project gets compiled and linked by using a simplified set of C++ language features that are specific to code that runs in kernel mode.
And then there is WIL, https://github.com/microsoft/wil
https://community.osr.com/discussion/291326/the-new-wil-libr...
> First off, let me point out that this library is used to implement large parts of the OS. There are hundreds of developers here who use it. So unlike, uh, some other things that get tossed onto github, this project is not likely to wither and die tomorrow.
> There are, however, only a handful of kernel developers working on the library, so the kernel support has been coming along much slower. I'd like to expand the existing kernel features in depth ....