register-watch

Register corruption during context switches occurs when the kernel fails to properly save and restore register state. This Skill provides snapshot and diff utilities to capture register values before and after context boundaries, letting you systematically compare state to identify where corruption happens.

Yes. This Skill enables watchpoints on critical registers and integrates with GDB sessions to track changes across interrupt and syscall boundaries. Set watchpoints, take snapshots at suspect points, then diff the register state to isolate where unexpected changes occur.

Snapshot registers before a context switch using the Skill's register capture utilities, then diff them after the switch completes. Comparing snapshots reveals whether the kernel properly preserved or corrupted each register, confirming save/restore correctness.

No. This Skill automates the process with systematic snapshot and diff capabilities within GDB, eliminating manual register inspection. You define snapshots at critical boundaries—context switches, interrupts, syscalls—and the Skill highlights differences automatically.

Syscall transitions involve kernel mode entry and exit, which must preserve user-space register state. Unexpected differences signal that the kernel's register-save or register-restore logic is broken, corrupting application state or violating ABI contracts that syscalls must maintain.