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keystone-engine
[Feature Request] Plans for Supporting riscv64 Arch?
I'm wondering if it's possible for keystone to add riscv64 (or namely, riscv64gc) support. The underlying llvm layer has already supported it, but I've noticed that the codes are not ported to https://github.com/keystone-engine/keystone/tree/master/llvm/lib/Target yet.
Some more information:
RISC-V is a modular ISA, meaning that it only has a mandatory base, and everything else is an extension. riscv64gc, taken as the baseline for most distrios where they simply claim this as "supporting RISCV64". Basically, it means "RISC-V 64-bit, extensions G and C", with the G extension being a shorthand for some other extensions:
M(integer multiplication and division)A(atomics)F(single-precision floats)D(double-precision floats)- "
Zifencei" ("fence" instruction) - "
Zicsr" (CSR instructions) - And the
Ibase integer instructions (which are always required)
The C instruction is for "compressed" instructions, making the most popular integer operations 16-bits (instead of 32-bit)
Thanks for your interest. I'm already trying to work on it but I'm a little busy...
No rush at all, but I was wondering if keystone has any plan to release a new version with the recently added RISC-V support. It's been three years since the last release.
And to make keystone buildable on riscv64 linux, I think it is needed to update the config.guess file here: https://github.com/keystone-engine/keystone/blob/master/llvm/cmake/config.guess . Old config.guess script can't detect riscv64 linux, relevant log: https://archriscv.felixc.at/.status/log.htm?url=logs/keystone/keystone-0.9.2-5.log
I once started working on a release several months ago because as you saw several things are broken but due to time limitation it was not done yet. Apologize for the delay.
I'm on a rush for several DDL recently so I hope to get this down early next year.