/* finds the address of the page global directory for a given pid */
status_t vmi_pid_to_dtb (vmi_instance_t vmi, vmi_pid_t pid, addr_t *dtb)
{
status_t ret = VMI_FAILURE;
addr_t _dtb = 0;
if (!vmi->os_interface)
return VMI_FAILURE;
if ( !pid ) {
*dtb = vmi->kpgd;
return VMI_SUCCESS;
}
ret = pid_cache_get(vmi, pid, &_dtb);
if ( VMI_FAILURE == ret ) {
if (vmi->os_interface->os_pid_to_pgd)
ret = vmi->os_interface->os_pid_to_pgd(vmi, pid, &_dtb);
if ( VMI_SUCCESS == ret )
pid_cache_set(vmi, pid, _dtb);
}
*dtb = _dtb;
return ret;
}
// Below are wrapper functions for external API access to the cache
void
vmi_pidcache_add(
vmi_instance_t vmi,
vmi_pid_t pid,
addr_t dtb)
{
return pid_cache_set(vmi, pid, dtb);
}
/* finds the address of the page global directory for a given pid */
addr_t vmi_pid_to_dtb (vmi_instance_t vmi, vmi_pid_t pid)
{
addr_t dtb = 0;
if (VMI_FAILURE == pid_cache_get(vmi, pid, &dtb)) {
if (vmi->os_interface && vmi->os_interface->os_pid_to_pgd) {
dtb = vmi->os_interface->os_pid_to_pgd(vmi, pid);
}
if (dtb) {
pid_cache_set(vmi, pid, dtb);
}
}
return dtb;
}