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VM_MAP_SUBMAP(9) BSD Kernel Developer's Manual VM_MAP_SUBMAP(9) NAME vm_map_submap -- create a subordinate map SYNOPSIS #include <sys/param.h> #include <vm/vm.h> #include <vm/vm_map.h> int vm_map_submap(vm_map_t map, vm_offset_t start, vm_offset_t end, vm_map_t submap); DESCRIPTION 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. IMPLEMENTATION NOTES This function is for internal use only. Both maps must exist. The range must have been created with vm_map_find(9) previously. 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. RETURN VALUES 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. SEE ALSO vm_map(9), vm_map_find(9) AUTHORS This manual page was written by Bruce M Simpson <bms@spc.org>. BSD July 19, 2003 BSD
NAME | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | SEE ALSO | AUTHORS
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