ExecContext
From M5
The ExecContext describes the interface that the ISA uses to access CPU state. Although there is a file src/cpu/exec_context.hh, it is purely for documentation purposes and classes do not derive from it. Instead, ExecContext is an implicit interface that is assumed by the ISA.
The ExecContext interface provides:
- Methods to read and write the PC, next-PC, and next next-PC
- Methods to read and write integer and floating point registers, given the parameters of a StaticInst, and an index into the StaticInst's array of source or destination register indices
- Methods to read and write miscellaneous registers
- Methods to read and write memory
- Various methods to support execution, such as recording and returning effective addresses, prefetching, and handling a syscall
- Methods to handle full-system mode, such as hwrei, reading/writing the interrupt flags, and checking simulator pal calls
Example implementations of the ExecContext interface include:
See the ISA description page for more details about how the ISA is written and generates code.
