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objdump -M for x86

Andrew Cagney ac131313@cygnus.com
Sat Nov 3 13:02:00 GMT 2001 
> 
> Actually, I was meaning that you don't need to call print_insn_i386_att
> or ..._intel;  Just call print_insn_i386 with info->mach set.

Hmm, I didn't see that ....

>  mode_64bit = (info->mach == bfd_mach_x86_64_intel_syntax
>  		|| info->mach == bfd_mach_x86_64);
>  
> +  if (intel_syntax == -1)
> +    intel_syntax = (info->mach == bfd_mach_i386_i386_intel_syntax
> +		    || info->mach == bfd_mach_x86_64_intel_syntax);
> +

See my other e-mail.  I can't find anything that sets ->mach to 
.._intel_syntax so, apart from backward compatibility, I can't think of 
a reason to hang on to those ``machine'' variants.  I don't expect GDB 
to start using them again.

>> Next problem ... If I understand things correctly, the set of possible 
>> options, for a given ISA family, is finite.  Could that finite list be 
>> made available via a published interface?
> 
> 
> Yes, good idea.  Something like:
> 
>   const char **opcodes_disasm_options (enum bfd_architecture arch)
> 
> returning a malloc'd list of strings for the given arch?

(if gdb is going to freeargv() it then I don't think you want the const).

Yes, anything like that.  Could add it to bfd_arch_info_type, or .... 
What ever BINUTILS is comfortable with I guess.

We'll need to do things like pin down the semantics.  Which really means 
agree on what something like ``x86-64 i386 i8086 intel att addr16 addr32 
data32 data16 suffix'' actually means, and ensure that GDB doesn't find 
it has accepted a set of options only to find them later rejected by the 
disasssembler.

(May one day need to add pre-parsed disassembler-options to the 
disassemble_info due to the overhead of constant re-parsing.  However, 
cross that bridge when someone notices a real problem :-)

Andrew
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