PowerPC remove 512 bytes region limit if 2nd DAWR is avaliable.
Power 10 introduces the 2nd DAWR (second watchpoint) and also removed a restriction that limit the watch region to 512 bytes. 2020-11-08 Rogerio A. Cardoso <rcardoso@linux.ibm.com> /gdb * ppc-linux-nat.c: (PPC_DEBUG_FEATURE_DATA_BP_ARCH_31): New define. (region_ok_for_hw_watchpoint): Check if 2nd DAWR is avaliable before set region.
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