vm_map_init(9) [freebsd man page]

VM_MAP_INIT(9)						   BSD Kernel Developer's Manual					    VM_MAP_INIT(9)

NAME

     vm_map_init -- initialize a vm_map structure for process zero

SYNOPSIS

     #include <sys/param.h>
     #include <vm/vm.h>
     #include <vm/vm_map.h>

     void
     vm_map_init(vm_map_t map, vm_offset_t min, vm_offset_t max);

DESCRIPTION

     The vm_map_init() function initializes the system map map by setting its upper and lower address bounds to max and min respectively.

     It also initializes the system map mutex.

IMPLEMENTATION NOTES

     This routine is for internal use only.  It is called during early system initialization.

SEE ALSO

     vm_map(9)

AUTHORS

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

BSD
								   July 19, 2003							       BSD

VM_MAP_CHECK_PROTECTION(9)				   BSD Kernel Developer's Manual				VM_MAP_CHECK_PROTECTION(9)

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 <bms@spc.org>.

BSD
								   July 19, 2003							       BSD