A small user program that reads or writes one address, by default
0x3fc98000, the base of the ESP32-S3 kernel DRAM region. A user process
must not reach it, so the access must fault and only the process must die.
"pffault w" makes the access a store, and a second argument names another
address.
With CONFIG_ESP32S3_PAGEFAULT and CONFIG_ESP32S3_PAGEFAULT_SELFTEST on the
kernel side, "pffault r 0x80000000" exercises the recoverable-fault restart
path, and "pffault r 0x0" the report path.
Assisted-by: Claude Code:claude-opus-5-5
Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>
