exec_map
size_t exec_map; /* Executable text mapping index. */
phdl->exec_map = phdl->nmappings;
p->mappings[p->exec_map].map.pr_vaddr));
error = vm_mmap(exec_map, (vm_offset_t *)&a_out, PAGE_SIZE,
kmap_free_wakeup(exec_map, a_out, PAGE_SIZE);
argkva->addr = kmap_alloc_wait(exec_map, exec_map_entry_size,
(void)vm_map_madvise(exec_map, base, base + exec_map_entry_size,
kmem_subinit(exec_map, kernel_map, &minaddr, &maxaddr, size, false);