vm_map_check_protection (9)

Leading comments

Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
All rights reserved.

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(The comments found at the beginning of the groff file "man9/vm_map_check_protection.9freebsd".)

NAME

vm_map_check_protection - check memory protection for a vm_map

SYNOPSIS

In sys/param.h In vm/vm.h In 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

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.

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 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.

SEE ALSO

munmap(2), vm_map9, vm_map_protect9

AUTHORS

This manual page was written by An Bruce M Simpson Aq bms@spc.org .