[Bug Report] RSD is excuting illegal instruction

[chenhychen]

Hi,

I have found that RSD can execute illegal instruction in the commit 7b65f6b.
According to RISC-V Instruction Set Privileged Architecture, the funct3 of the load/store instruction should be from 000 to 110.
However, if the funct3 is set to 111, the RSD can still execute the instruction but Spike throws the illegal instruction exception.

For example, executing the instruction hex code 0x00817703 will cause Spike to throw the illegal instruction exception, but RSD executes it. Attach a hex file that can trigger this vulnerability.

illegal_load.zip

[reo-pon]

Hi. I apologize for my late reply.
Thank you for reporting the bug.

As you pointed out, the instruction 7b65f6b should cause an invalid instruction exception, but RSD processes it as a valid instruction.
I will fix this bug soon.