Tag
instruction-decoding
- Apr 29, 2026 Single-Stepping: One Flags Bit and Its Cost per Instruction The trap flag makes the processor raise an exception after every instruction. How debuggers use it, why stepping over a call needs a breakpoint instead, and where it does not exist. developer tools
- Jun 4, 2025 Emulated MMIO: Instruction Decode, Register Semantics, and Exit Storms How a write to an emulated device register becomes a trap, what the hypervisor must decode before it can act, and why a driver that pokes registers in a loop degrades an entire host. virtualization