vm_map_check_protec... FreeBSD Kernel Developer's Manualvm_map_check_protec...

NAME    [Toc]    [Back]

     vm_map_check_protection -- check memory protection for a vm_map

SYNOPSIS    [Toc]    [Back]

     #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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

     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    [Toc]    [Back]

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

AUTHORS    [Toc]    [Back]

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


				 July 19, 2003