Tag
memory-access
- Dec 5, 2025 Copying Data Across the User-Kernel Boundary Why the kernel cannot simply dereference a pointer supplied by a program, how the copy routines validate and fault, and where the bytes actually go. operating systems
- May 20, 2025 How a Probe Reads Memory Without the CPU: Debug Ports and Access Ports The transaction sequence a debug probe uses over SWD or JTAG to halt a core and touch memory, and why some reads return stale data even though the transfer succeeded. embedded systems