+ Read the values of either the general register set (WHICH equals 0)
+ or the floating point register set (WHICH equals 2) from the core
+ file data (pointed to by CORE_REG_SECT), and update gdb's idea of
+ their current values. The CORE_REG_SIZE parameter is compared to
+ the size of the gregset or fpgregset structures (as appropriate) to
+ validate the size of the structure from the core file. The
+ REG_ADDR parameter is ignored.