xnu-517.3.7.tar.gz

[apple/xnu.git] / osfmk / vm / vm_kern.c

diff --git a/osfmk/vm/vm_kern.c b/osfmk/vm/vm_kern.c
index 10cb0eebd713bce9a6c695107c9f088f70bc6678..5b5b9cbc843c3f5e95e3dd0097f1588e12a7fec7 100644 (file)
--- a/osfmk/vm/vm_kern.c
+++ b/osfmk/vm/vm_kern.c
@@ -120,7 +120,7 @@ kmem_alloc_contig(
                return KERN_INVALID_ARGUMENT;
        }
 
-       size = round_page(size);
+       size = round_page_32(size);
        if ((flags & KMA_KOBJECT) == 0) {
                object = vm_object_allocate(size);
                kr = vm_map_find_space(map, &addr, size, mask, &entry);
@@ -213,7 +213,7 @@ kernel_memory_allocate(
        vm_offset_t             i;
        kern_return_t           kr;
 
-       size = round_page(size);
+       size = round_page_32(size);
        if ((flags & KMA_KOBJECT) == 0) {
                /*
                 *      Allocate a new object.  We must do this before locking
@@ -356,10 +356,10 @@ kmem_realloc(
        vm_page_t       mem;
        kern_return_t   kr;
 
-       oldmin = trunc_page(oldaddr);
-       oldmax = round_page(oldaddr + oldsize);
+       oldmin = trunc_page_32(oldaddr);
+       oldmax = round_page_32(oldaddr + oldsize);
        oldsize = oldmax - oldmin;
-       newsize = round_page(newsize);
+       newsize = round_page_32(newsize);
 
 
        /*
@@ -506,7 +506,7 @@ kmem_alloc_pageable(
 #else
        addr = vm_map_min(map);
 #endif
-       kr = vm_map_enter(map, &addr, round_page(size),
+       kr = vm_map_enter(map, &addr, round_page_32(size),
                          (vm_offset_t) 0, TRUE,
                          VM_OBJECT_NULL, (vm_object_offset_t) 0, FALSE,
                          VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
@@ -533,8 +533,9 @@ kmem_free(
 {
        kern_return_t kr;
 
-       kr = vm_map_remove(map, trunc_page(addr),
-                          round_page(addr + size), VM_MAP_REMOVE_KUNWIRE);
+       kr = vm_map_remove(map, trunc_page_32(addr),
+                               round_page_32(addr + size), 
+                               VM_MAP_REMOVE_KUNWIRE);
        if (kr != KERN_SUCCESS)
                panic("kmem_free");
 }
@@ -550,7 +551,7 @@ kmem_alloc_pages(
        register vm_size_t              size)
 {
 
-       size = round_page(size);
+       size = round_page_32(size);
         vm_object_lock(object);
        while (size) {
            register vm_page_t  mem;
@@ -617,7 +618,9 @@ kmem_remap_pages(
             *  but this shouldn't be a problem because it is wired.
             */
            PMAP_ENTER(kernel_pmap, start, mem, protection, 
-                               VM_WIMG_USE_DEFAULT, TRUE);
+                       ((unsigned int)(mem->object->wimg_bits))
+                                       & VM_WIMG_MASK,
+                       TRUE);
 
            start += PAGE_SIZE;
            offset += PAGE_SIZE;
@@ -651,7 +654,7 @@ kmem_suballoc(
        vm_map_t map;
        kern_return_t kr;
 
-       size = round_page(size);
+       size = round_page_32(size);
 
        /*
         *      Need reference on submap object because it is internal
@@ -723,9 +726,9 @@ kmem_init(
         /*
          * Account for kernel memory (text, data, bss, vm shenanigans).
          * This may include inaccessible "holes" as determined by what
-         * the machine-dependent init code includes in mem_size.
+         * the machine-dependent init code includes in max_mem.
          */
-        vm_page_wire_count = (atop(mem_size) - (vm_page_free_count
+        vm_page_wire_count = (atop_64(max_mem) - (vm_page_free_count
                                                 + vm_page_active_count
                                                 + vm_page_inactive_count));
 }
@@ -750,7 +753,7 @@ kmem_io_object_trunc(copy, new_size)
 
        old_size = (vm_size_t)round_page_64(copy->size);
        copy->size = new_size;
-       new_size = round_page(new_size);
+       new_size = round_page_32(new_size);
 
         vm_object_lock(copy->cpy_object);
         vm_object_page_remove(copy->cpy_object,
@@ -886,6 +889,7 @@ vm_conflict_check(
                }
                if (entry->is_sub_map) {
                        vm_map_t        old_map;
+
                        old_map = map;
                        vm_map_lock(entry->object.sub_map);
                        map = entry->object.sub_map;
@@ -906,21 +910,46 @@ vm_conflict_check(
                                        return KERN_FAILURE;
                                }
                                kr = KERN_ALREADY_WAITING;
-                       } else if(
-                               ((file_off < ((obj->paging_offset) + obj_off)) &&
-                               ((file_off + len) > 
-                                       ((obj->paging_offset) + obj_off))) ||
-                               ((file_off > ((obj->paging_offset) + obj_off)) &&
-                               (((((obj->paging_offset) + obj_off)) + len) 
-                                       > file_off))) { 
-                               vm_map_unlock(map);
-                               return KERN_FAILURE;
+                       } else {
+                               vm_object_offset_t      obj_off_aligned;
+                               vm_object_offset_t      file_off_aligned;
+
+                               obj_off_aligned = obj_off & ~PAGE_MASK;
+                               file_off_aligned = file_off & ~PAGE_MASK;
+
+                               if (file_off_aligned == (obj->paging_offset + obj_off_aligned)) {
+                                       /*
+                                        * the target map and the file offset start in the same page
+                                        * but are not identical... 
+                                        */
+                                       vm_map_unlock(map);
+                                       return KERN_FAILURE;
+                               }
+                               if ((file_off < (obj->paging_offset + obj_off_aligned)) &&
+                                   ((file_off + len) > (obj->paging_offset + obj_off_aligned))) {
+                                       /*
+                                        * some portion of the tail of the I/O will fall
+                                        * within the encompass of the target map
+                                        */
+                                       vm_map_unlock(map);
+                                       return KERN_FAILURE;
+                               }
+                               if ((file_off_aligned > (obj->paging_offset + obj_off)) &&
+                                   (file_off_aligned < (obj->paging_offset + obj_off) + len)) {
+                                       /*
+                                        * the beginning page of the file offset falls within
+                                        * the target map's encompass
+                                        */
+                                       vm_map_unlock(map);
+                                       return KERN_FAILURE;
+                               }
                        }
                } else if(kr != KERN_SUCCESS) {
+                       vm_map_unlock(map);
                        return KERN_FAILURE;
                }
 
-               if(len < ((entry->vme_end - entry->vme_start) -
+               if(len <= ((entry->vme_end - entry->vme_start) -
                                                (off - entry->vme_start))) {
                        vm_map_unlock(map);
                        return kr;
@@ -940,6 +969,4 @@ vm_conflict_check(
 
        vm_map_unlock(map);
        return kr;
-
-
 }