Re: How to port binutils to other arch?

[Nick Clifton]

Hi Harry,

>     I want to know what to do if I want to let binutils support another
> architecture, for example, if we have one new processor with some
> different instructions, how to add them to binutils?

There are two basic methods.  If your new processor is just a variant of 
a currently existing cpu type then you can add the support to the 
currently existing code.  So for example suppose that you were creating 
a MIPS variant with a few new instructions.  You could add code to 
opcodes/mips-opc.c to describe the new instructions and code to 
gas/config/tc-mips.c to ensure that the new instructions are only 
accepted when assembling for this new processor.

On the other hand if your new processor is really new,  not just a 
variant, then you should add a new configuration target for it.  This 
involves adding new files to the bfd, gas, include, ld, and opcodes 
directories, (along the lines of the files that are already present 
there), and teaching the configure mechanisms about your new target.

Cheers
  Nick