/* * Copyright (c) 2004 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #ifndef NO_SYSCALL_LEGACY #define _NONSTD_SOURCE #include <sys/cdefs.h> #include <sys/types.h> #include <sys/mman.h> #include <mach/vm_param.h> #include <mach/mach_init.h> #include "stack_logging_internal.h" /* * Stub function to account for the differences in standard compliance * while maintaining binary backward compatibility. * * This is only the legacy behavior. */ extern int __munmap(void *, size_t); int munmap(void *addr, size_t len) { size_t offset; if (len == 0) { /* * Standard compliance now requires the system to return EINVAL * for munmap(addr, 0). Return success now to maintain * backwards compatibility. */ return 0; } /* * Page-align "addr" since the system now requires it * for standards compliance. * Update "len" to reflect the adjustment and still cover the same area. */ offset = ((uintptr_t) addr) & PAGE_MASK; addr = (void *) (((uintptr_t) addr) & ~PAGE_MASK); len += offset; int result = __munmap(addr, len); if (__syscall_logger) { __syscall_logger(stack_logging_type_vm_deallocate, (uintptr_t)mach_task_self(), (uintptr_t)addr, len, 0, 0); } return result; } #endif /* NO_SYSCALL_LEGACY */