diff options
Diffstat (limited to 'sysdeps/mach/readonly-area.c')
-rw-r--r-- | sysdeps/mach/readonly-area.c | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/sysdeps/mach/readonly-area.c b/sysdeps/mach/readonly-area.c deleted file mode 100644 index c187b06a7b..0000000000 --- a/sysdeps/mach/readonly-area.c +++ /dev/null @@ -1,56 +0,0 @@ -/* Test if a memory region is wholly unwritable. Mach version. - Copyright (C) 2004-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <stdlib.h> -#include <stdint.h> -#include <mach.h> - -/* Return 1 if the whole area PTR .. PTR+SIZE is not writable. - Return -1 if it is writable. */ - -int -__readonly_area (const char *ptr, size_t size) -{ - vm_address_t region_address = (uintptr_t) ptr; - vm_size_t region_length = size; - vm_prot_t protection; - vm_prot_t max_protection; - vm_inherit_t inheritance; - boolean_t is_shared; - mach_port_t object_name; - vm_offset_t offset; - - while (__vm_region (__mach_task_self (), - ®ion_address, ®ion_length, - &protection, &max_protection, &inheritance, &is_shared, - &object_name, &offset) == KERN_SUCCESS - && region_address <= (uintptr_t) ptr) - { - region_address += region_length; - if (region_address < (uintptr_t) ptr) - continue; - - if (protection & VM_PROT_WRITE) - return -1; - - if (region_address - (uintptr_t) ptr >= size) - break; - } - - return 1; -} |