VM Debugging Across Isolated Kernel and User Memory Contexts

The patent introduces a context manager as an intermediary component that mediates between the debugger and the isolated memory contexts. The context manager receives context requests from the debugger, translates them into appropriate memory access requests, and returns results without breaking the page table isolation. This allows debugging functionality to penetrate the isolation barrier through a controlled interface rather than removing the isolation itself.

The patent segments the debugging functionality into distinct components: context request management, context identifier handling, and memory access translation. By dividing the debugging process into discrete segments that interact through well-defined interfaces (context requests and responses), the system maintains isolation while enabling controlled access for debugging purposes.

The patent implements dynamic context switching capability where the context manager can switch between different memory contexts on demand. The system dynamically translates virtual addresses from one context to another by retrieving the appropriate context identifier and using it to access the target memory space. This dynamic adaptation allows the system to maintain strict isolation during normal operation while providing flexible cross-context access when debugging is required.

The patent changes the parameter of memory access by introducing context identifiers that modify how virtual addresses are translated. Instead of direct memory access, the system transforms memory access requests by incorporating context identifiers that redirect the translation process to the appropriate page tables, thereby changing the access parameter from direct to indirect through context mediation.

The context manager implements a universal interface that handles both kernel space and user space debugging through the same mechanism. By providing a single context request interface that can target any memory context (kernel or user), the system achieves multi-functionality without requiring separate debugging paths, thus maintaining security isolation while enabling concurrent debugging of both spaces.

The context manager serves as a mediator that sits between the debugger and the privileged kernel space, as well as user space. It translates debugger requests into appropriate context-switched memory access operations, allowing the debugger to access both kernel and user memory spaces through a single unified interface without compromising the security boundaries between privileged and unprivileged operations.