* Add riscv_hit_watchpoint function for RV32I loads and stores
For GDB to fully support hardware watchpoints, OpenOCD needs to tell GDB
which data address has been hit. OpenOCD relies on a target-specific
hit_watchpoint function to do this. If GDB is not given the address, it
will not print the hit variable name or its old and new value.
There does not seem to be a way for the hardware to tell us which trigger
was hit (0.13 introduced the 'hit bit' but this is optional). Alternatively,
we can decode the instruction at dpc and find out which memory address
it accesses.
This commit adds support for RV32I load and store instructions
and could be extended for additional instructions in the future.
* 0.11: change debug reason for hw triggers to DBG_REASON_WATCHPOINT
This is to make sure riscv_hit_watchpoint is called to check for a data
address hit.
* Fix style issues
* Change %lx to PRIx64 to clear -m32 build errors
* Add clarifying comments/todos
* Fix types in format strings
7897d40099