Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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$FreeBSD: releng/11.0/share/man/man9/vm_map_check_protection.9 267936 2014-06-26 21:44:30Z bapt $
.Dd July 19, 2003 .Dt VM_MAP_CHECK_PROTECTION 9 .Os .Sh NAME .Nm vm_map_check_protection .Nd check memory protection for a vm_map .Sh SYNOPSIS n sys/param.h n vm/vm.h n vm/vm_map.h .Ft boolean_t .Fo vm_map_check_protection .Fa "vm_map_t map" "vm_offset_t start" "vm_offset_t end" "vm_prot_t protection" .Fc .Sh DESCRIPTION The .Fn vm_map_check_protection function asserts that the target .Fa map allows the specified privilege .Fa protection over the entire address range from .Fa start to .Fa end . The region MUST be contiguous; no holes are allowed. .Sh 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. .Sh RETURN VALUES The .Fn 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. .Sh SEE ALSO .Xr munmap 2 , .Xr vm_map 9 , .Xr vm_map_protect 9 .Sh AUTHORS This manual page was written by .An Bruce M Simpson Aq Mt bms@spc.org .