Provided by: freebsd-manpages_8.2-1_all
vm_map_submap — create a subordinate map
vm_map_submap(vm_map_t map, vm_offset_t start, vm_offset_t end,
The vm_map_submap() function marks the range bounded by start and end
within the map map as being handled by a subordinate map sub_map.
It is generally called by the kernel memory allocator.
This function is for internal use only.
Both maps must exist. The range must have been created with
No other operations may have been performed on this range before calling
this function. Only the vm_fault() operation may be performed within
this range after calling this function.
To remove a submapping, one must first remove the range from the parent
map, and then destroy the sub_map. This procedure is not recommended.
The vm_map_submap() function returns KERN_SUCCESS if successful.
Otherwise, it returns KERN_INVALID_ARGUMENT if the caller requested copy-
on-write flags, or if the range specified for the sub-map was out of
range for the parent map, or if a NULL backing object was specified.
This manual page was written by Bruce M Simpson ⟨email@example.com⟩.