vm_map_submap(9) [linux man page]

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 recom-
     mended.

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

Check Out this Related Man Page

VM_MAP_PROTECT(9)					   BSD Kernel Developer's Manual					 VM_MAP_PROTECT(9)

NAME

     vm_map_protect -- apply protection bits to a virtual memory region

SYNOPSIS

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/vm_map.h>

     int
     vm_map_protect(vm_map_t map, vm_offset_t start, vm_offset_t end, vm_prot_t new_prot, boolean_t set_max);

DESCRIPTION

     The vm_map_protect() function sets the protection bits of the address region bounded by start and end within the map map to new_prot.

     If set_max is TRUE, new_prot is treated as the new max_protection setting for each underlying entry.  Otherwise, only the protection field is
     affected.

     The range MUST be contiguous, and MUST NOT contain sub-maps.

IMPLEMENTATION NOTES

     The function acquires a lock on the map for the duration, by calling vm_map_lock(9).

RETURN VALUES

     The vm_map_protect() function returns KERN_SUCCESS if the protection bits could be set successfully.

     If a sub-map entry was encountered in the range, KERN_INVALID_ARGUMENT is returned.  If the value of new_prot would exceed max_protection for
     an entry within the range, KERN_PROTECTION_FAILURE is returned.

SEE ALSO

     vm_map(9)

AUTHORS

     This manual page was written by Bruce M Simpson <bms@spc.org>.

BSD
								   July 19, 2003							       BSD

Linux and UNIX Man Pages

vm_map_submap(9) [linux man page]

Check Out this Related Man Page