NAME

       vm_map_check_protection — check memory protection for a vm_map

SYNOPSIS

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

       boolean_t
       vm_map_check_protection(vm_map_t map, vm_offset_t start, vm_offset_t end, vm_prot_t protection);

DESCRIPTION

       The  vm_map_check_protection()  function  asserts  that  the  target  map  allows the specified privilege
       protection over the entire address range from start to end.  The region MUST be contiguous; no holes  are
       allowed.

IMPLEMENTATION NOTES

       This  code does not and SHOULD not check whether the contents of the region are accessible.  For example,
       a small file may be mapped into an address space which is significantly larger in size.

RETURN VALUES

       The vm_map_check_protection() function returns TRUE if the privilege is allowed; if it is not allowed, or
       if any other error occurred, the value FALSE is returned.

SEE ALSO

       munmap(2), vm_map(9), vm_map_protect(9)

AUTHORS

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

Debian                                            July 19, 2003                       VM_MAP_CHECK_PROTECTION(9)