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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 re- gion bounded by start and end within the map map to new_prot. The value specified by new_prot may not include any protection bits that are not set in max_protection on every entry within the range. If set_max is TRUE, new_prot is treated as the new max_protection setting for each underlying entry. Protection bits not included new_prot will be cleared from existing entries. If set_max is FALSE 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. If a copy- on-write mapping is transitioned from read-only to read-write, and too little swap space is available for backing the copied pages, KERN_RESOURCE_SHORTAGE is returned. SEE ALSO vm_map(9) AUTHORS This manual page was written by Bruce M Simpson <bms@spc.org>. BSD June 20, 2019 BSD
NAME | SYNOPSIS | DESCRIPTION | IMPLEMENTATION NOTES | RETURN VALUES | SEE ALSO | AUTHORS
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