#### 21.4.2 A29K

`set rstack_high_address` address
  On AMD 29000 family processors, registers are saved in a separate register stack. There is no way for gdb to determine the extent of this stack. Normally, gdb just assumes that the stack is “large enough”. This may result in gdb referencing memory locations that do not exist. If necessary, you can get around this problem by specifying the ending address of the register stack with the `set rstack_high_address` command. The argument should be an address, which you probably want to precede with ‘`0x`’ to specify in hexadecimal.

`show rstack_high_address`
  Display the current limit of the register stack, on AMD 29000 family processors.