diff options
Diffstat (limited to 'vm/vm_user.c')
| -rw-r--r-- | vm/vm_user.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/vm/vm_user.c b/vm/vm_user.c index f7c87cc0..8c7a5d8f 100644 --- a/vm/vm_user.c +++ b/vm/vm_user.c @@ -405,15 +405,32 @@ kern_return_t vm_map( * * [ To unwire the pages, specify VM_PROT_NONE. ] */ -kern_return_t vm_wire(host, map, start, size, access) - const host_t host; +kern_return_t vm_wire(port, map, start, size, access) + const ipc_port_t port; vm_map_t map; vm_offset_t start; vm_size_t size; vm_prot_t access; { - if (host == HOST_NULL) + host_t host; + boolean_t priv; + + if (!IP_VALID(port)) + return KERN_INVALID_HOST; + + ip_lock(port); + if (!ip_active(port) || + (ip_kotype(port) != IKOT_HOST_PRIV + && ip_kotype(port) != IKOT_HOST)) + { + ip_unlock(port); return KERN_INVALID_HOST; + } + + priv = ip_kotype(port) == IKOT_HOST_PRIV; + ip_unlock(port); + + host = (host_t) port->ip_kobject; if (map == VM_MAP_NULL) return KERN_INVALID_TASK; @@ -426,6 +443,10 @@ kern_return_t vm_wire(host, map, start, size, access) if (projected_buffer_in_range(map, start, start+size)) return(KERN_INVALID_ARGUMENT); + /* TODO: make it tunable */ + if (!priv && access != VM_PROT_NONE && map->user_wired + size > 65536) + return KERN_NO_ACCESS; + return vm_map_pageable_user(map, trunc_page(start), round_page(start+size), |