| 648 | } |
| 649 | |
| 650 | int |
| 651 | kern_mprotect(struct thread *td, uintptr_t addr0, size_t size, int prot) |
| 652 | { |
| 653 | vm_offset_t addr; |
| 654 | vm_size_t pageoff; |
| 655 | int vm_error, max_prot; |
| 656 | int flags; |
| 657 | |
| 658 | addr = addr0; |
| 659 | if ((prot & ~(_PROT_ALL | PROT_MAX(_PROT_ALL))) != 0) |
| 660 | return (EINVAL); |
| 661 | max_prot = PROT_MAX_EXTRACT(prot); |
| 662 | prot = PROT_EXTRACT(prot); |
| 663 | pageoff = (addr & PAGE_MASK); |
| 664 | addr -= pageoff; |
| 665 | size += pageoff; |
| 666 | size = (vm_size_t) round_page(size); |
| 667 | #ifdef COMPAT_FREEBSD32 |
| 668 | if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) { |
| 669 | if (((addr + size) & 0xffffffff) < addr) |
| 670 | return (EINVAL); |
| 671 | } else |
| 672 | #endif |
| 673 | if (addr + size < addr) |
| 674 | return (EINVAL); |
| 675 | |
| 676 | flags = VM_MAP_PROTECT_SET_PROT; |
| 677 | if (max_prot != 0) |
| 678 | flags |= VM_MAP_PROTECT_SET_MAXPROT; |
| 679 | vm_error = vm_map_protect(&td->td_proc->p_vmspace->vm_map, |
| 680 | addr, addr + size, prot, max_prot, flags); |
| 681 | |
| 682 | switch (vm_error) { |
| 683 | case KERN_SUCCESS: |
| 684 | return (0); |
| 685 | case KERN_PROTECTION_FAILURE: |
| 686 | return (EACCES); |
| 687 | case KERN_RESOURCE_SHORTAGE: |
| 688 | return (ENOMEM); |
| 689 | case KERN_OUT_OF_BOUNDS: |
| 690 | return (ENOTSUP); |
| 691 | } |
| 692 | return (EINVAL); |
| 693 | } |
| 694 | |
| 695 | #ifndef _SYS_SYSPROTO_H_ |
| 696 | struct minherit_args { |
no test coverage detected