kdb: add rdmsr and wrmsr commands for i386

[Jordan Crouse]

On 15/05/07 01:56 -0400, Bernardo Innocenti wrote:
> The syntax is:
>    rdmsr <addr>
>    wrmsr <addr> <l> <h>

Awesome!  This will make all the difference in the world! :)
Just a few nitpicks...

> diff --git a/arch/i386/kdb/kdbasupport.c b/arch/i386/kdb/kdbasupport.c
> index 482b319..8ecef2e 100644
> --- a/arch/i386/kdb/kdbasupport.c
> +++ b/arch/i386/kdb/kdbasupport.c
> @@ -223,6 +223,47 @@ kdba_removedbreg(kdb_bp_t *bp)
>   	kdba_putdr7(dr7);
>   }
> 
> +static int
> +kdba_rdmsr(int argc, const char **argv)
> +{
> +	unsigned long addr;
> +	uint64_t val;
> +	int diag;
> +
> +	if (argc != 1) {
> +		return KDB_ARGCOUNT;
> +	}
> +
> +	if ((diag = kdbgetularg(argv[1], &addr)))
> +		return diag;
> +
> +	kdb_printf("msr(0x%lx) = ", addr);
> +	rdmsrl(addr, val);
> +	kdb_printf("0x%llx\n", val);

Can you break this up with a : between the high dword and the low dword?
That makes it easier to parse when debugging.

Also, would it make sense to coordinate the order of the high and low
dwords with the order they are specified with 'wrmsr'?  
I don't think it matters which order (lo-hi hi-lo) you use - The AMD
debuggers use hi:lo, and Mitch uses lo:hi -  as long as you pick one
and stay consistant, we'll be fine.

Thanks a billion!
Jordan