static int
__zero_segment (int envid, u_int start, u_int sz)
{
u_int temp_pages;
assert (!(start & PGMASK));
temp_pages = (u_int)__malloc(PGROUNDUP(sz));
if (temp_pages == 0) return -1;
/* alloc pages for this segment and map into our address space writeable */
if (__vm_alloc_region (temp_pages, sz, 0, PG_P|PG_U|PG_W) < 0) {
__free((void*)temp_pages);
return -1;
}
/* and map them into the other address space */
if (__vm_share_region (temp_pages, sz, 0, 0, envid, start) < 0) {
__free((void*)temp_pages);
return -1;
}
/* zero the pages */
bzero ((void *)temp_pages, sz);
/* and remove our mapping of the pages */
if (__vm_free_region (temp_pages, sz, 0) < 0) {
__free((void*)temp_pages);
return -1;
}
__free((void*)temp_pages);
return 0;
}
/* Makes the ash region shared */
void
AllocAshShareRegion(void) {
/* printf("AllocAshShareRegion sz: %d\n",sizeof(struct ash_sh_network)); */
if (__vm_alloc_region(ADD_UVA(ASH_PKT_DATA_ADDR),
sizeof(struct ash_sh_network), 0,
PG_SHARED|PG_P|PG_U|PG_W) < 0) {
printf ("couldn't insert ash data pte's\n");
__die();
}
}
