Re: kgdb on amd64

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Thu, Jul 09, 2015 at 04:47:19PM +0100, Patrick Welche wrote:
> kvtopte() is defined in sys/arch/x86/include/pmap.h:

static __inline pt_entry_t * __unused
kvtopte(vaddr_t va)
{
        pd_entry_t *pde;

        KASSERT(va >= VM_MIN_KERNEL_ADDRESS);

        pde = L2_BASE + pl2_i(va);
        if (*pde & PG_PS)
                return ((pt_entry_t *)pde);

        return (PTE_BASE + pl1_i(va));
}

> #define pl1_i(VA)       (((VA_SIGN_POS(VA)) & L1_FRAME) >> L1_SHIFT)
> 
> So, where is the lock? (or is the address illegal?)

(Sorry - sent vtopte instead of kvtopte)