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vm_map_check_protection(9) [freebsd man page]

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

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

NAME
vm_map_protect -- apply protection bits to a virtual memory region SYNOPSIS
#include <sys/param.h> #include <vm/vm.h> #include <vm/vm_map.h> int vm_map_protect(vm_map_t map, vm_offset_t start, vm_offset_t end, vm_prot_t new_prot, boolean_t set_max); DESCRIPTION
The vm_map_protect() function sets the protection bits of the address region bounded by start and end within the map map to new_prot. If set_max is TRUE, new_prot is treated as the new max_protection setting for each underlying entry. Otherwise, only the protection field is affected. The range MUST be contiguous, and MUST NOT contain sub-maps. IMPLEMENTATION NOTES
The function acquires a lock on the map for the duration, by calling vm_map_lock(9). RETURN VALUES
The vm_map_protect() function returns KERN_SUCCESS if the protection bits could be set successfully. If a sub-map entry was encountered in the range, KERN_INVALID_ARGUMENT is returned. If the value of new_prot would exceed max_protection for an entry within the range, KERN_PROTECTION_FAILURE is returned. SEE ALSO
vm_map(9) AUTHORS
This manual page was written by Bruce M Simpson <bms@spc.org>. BSD
July 19, 2003 BSD
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