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To: John Baldwin <jhb@freebsd.org>
From: Ian FREISLICH <ianf@clue.co.za>
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John Baldwin wrote:
> On Wednesday, May 23, 2012 12:28:53 am Ian FREISLICH wrote:
> > (kgdb) frame 7
> > #7  0xc0878682 in pmap_enter (pmap=0xc09e4060, va=3359633408, access=7 '\a'
, 
> >     m=0xc191bf70, prot=7 '\a', wired=1) at 
> /usr/src/sys/i386/i386/pmap.c:1596
> > 1596                    root = vm_page_splay(mpte->pindex, root);
> > (kgdb) l
> > 1591            root = pmap->pm_root;
> > 1592            if (root == NULL) {
> > 1593                    mpte->left = NULL;
> > 1594                    mpte->right = NULL;
> > 1595            } else {
> > 1596                    root = vm_page_splay(mpte->pindex, root);
> > 1597                    if (mpte->pindex < root->pindex) {
> > 1598                            mpte->left = root->left;
> > 1599                            mpte->right = root;
> > 1600                            root->left = NULL;
> 
> Ok, can you do 'p root', 'p mpte', and 'p *mpte'?

(kgdb) frame 7
#7  0xc0878682 in pmap_enter (pmap=0xc09e4060, va=3359633408, access=7 '\a', 
    m=0xc191bf70, prot=7 '\a', wired=1) at /usr/src/sys/i386/i386/pmap.c:1596
1596                    root = vm_page_splay(mpte->pindex, root);
(kgdb) p root
No symbol "root" in current context.
(kgdb) p mpte
$1 = 0x0
(kgdb) p *mpte
Cannot access memory at address 0x0


-- 
Ian Freislich