VMs are common in advanced packers or virii, but they seem to follow the same architectures (x86 or stack machine).
I was curious, and implemented, around a small fibonacci example, the usual models of course, but as well the TTA and Subleq ones, two models of one instruction set architectures.
Opcode-less VMs are quite small in code, but the virtual code is quite obscure - which makes an easy but annoying challenge:
typically, you would expect that MOV is the most basic opcode, and arithmetic operations tend to be more complex. But in Subleq, a standard MOV is made of 4 lines of code, while SUB+JLE is only 1.
Rise in prison death rates during the pandemic
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The Marshall Project highlights research on excess mortality in U.S.
prisons: The slowdown…
*Tags:* Marshall Project, mortality, pandemic
4 hours ago