THIS CATEGORY NOT YET ORGANIZED, SEE THE
SHADE PAPER.
Note: the system mode may be marked in parenthesis, e.g. (s), indicating that the host processor does not have a distinct system mode in hardware, but the tool is intended to work with (simulate, trace, etc.) operating system code.
Processor simulators typically implement either a full procesor or just the user-mode part of the instruction set. A full simulation is more precise and allows analysis of operating systems, etc. However, it also requires implementing the processor's protected mode architecture, simulated devices, etc. An alternative is to implement just the user-mode portion of the ISA and to implement system calls (transitions to protected mode) using simulator code rather than by simulating the operating system. OS emulation is typically less accurate