VM_MAP_CHECK_PROTECTION(9) FreeBSD Kernel Developer's Manual
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 <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 July 19, 2003 FreeBSD 14.1-RELEASE-p8