vm_map_check_protection(9)
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.
