*nix Documentation Project
·  Home
 +   man pages
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

  man pages->FreeBSD man pages -> vm_map_check_protection (9)              


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>

     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.


     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
[ Back ]
 Similar pages
Name OS Title
mprotect HP-UX set or check protection of memory mapping
mprotect IRIX set protection of memory mapping
vm_map_protect FreeBSD apply protection bits to a virtual memory region
mvalid Tru64 Check memory region for validity
kernacc FreeBSD check memory regions for accessibility
useracc FreeBSD check memory regions for accessibility
vm_map_unlock FreeBSD vm_map locking macros
vm_map_lock_downgrade FreeBSD vm_map locking macros
vm_map_lock FreeBSD vm_map locking macros
vm_map_lock_read FreeBSD vm_map locking macros
Copyright © 2004-2005 DeniX Solutions SRL
newsletter delivery service