[Crash-utility] [PATCH} crash 4.0-2.8 fixes to make it workonx86_64 for 2.6.14

[Badari Pulavarty]

On Wed, 2005-11-02 at 17:34 -0500, Dave Anderson wrote:
> > crash> rd -u 0x400000 
> > rd: invalid user virtual address: 400000  type: "64-bit UVADDR" 
> 
> Ah, damn it -- it would also be printed later on in 
> readmem() if uvtop() fails: 
> 
>         while (size > 0) { 
>                 switch (memtype) 
>                 { 
>                 case UVADDR: 
>                         if (!uvtop(CURRENT_CONTEXT(), addr, &paddr,
> 0)) { 
>                                 if (PRINT_ERROR_MESSAGE) 
>                                         error(INFO, INVALID_UVADDR,
> addr, type); 
>                                 goto readmem_error; 
>                         } 
>                         break; 
> 
> That's probably where it's happening... 
> 
> I would guess that x86_64_uvtop() needs to immediately 
> recognize if the new VM scheme is in place, and if so 
> it should veer off to a new "x86_64_uvtop_lev4()" routine. 

Yep. I realized that after sending you e-mail. Now we have
4-level pagetables which include "PUD".  I cooked up one,
but its still not working :(

I tried reusing the FILL_PML4 code from x86_64_kvtop()
for x86_64_uvtop() -- it still doesn't work.

I need to spend more time on it to understand it better
before I hack it up blindly.

Thanks,
Badari