The new sub-command for info is added using add_info

add_info ("spr", or1k_info_spr_command,
          "Show the value of a special purpose register");
	  

The functionality is provided in or1k_info_spr_command. The user can specify a group by name or number (the value of all registers in that group is displayed), or a register name (the value of that register is displayed) or a group name/number and register name/number (the value of that register in the group is displayed).

The arguments are broken out from the text of the command using or1k_parse_params, which also handles any errors in syntax or semantics. If the arguments are successfully parsed the results are then printed out using the UI independent function, ui_out_field_fmt.

The SPR is read using the convenience function or1k_read_spr. This converts the access to a call of the command readspr, which can be passed to the target usings its to_rcmd target operation (see Section 4.3.7). This will allow the SPR to be accessed in the way most appropriate to the current target access method.