1/* 2 * Copyright (c) 2004 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23 24#ifndef NO_SYSCALL_LEGACY 25 26#define _NONSTD_SOURCE 27#include <sys/cdefs.h> 28 29#include <sys/types.h> 30#include <sys/mman.h> 31#include <mach/vm_param.h> 32#include <mach/mach_init.h> 33#include "stack_logging_internal.h" 34 35/* 36 * Stub function to account for the differences in standard compliance 37 * while maintaining binary backward compatibility. 38 * 39 * This is only the legacy behavior. 40 */ 41extern int __munmap(void *, size_t); 42 43int 44munmap(void *addr, size_t len) 45{ 46 size_t offset; 47 48 if (len == 0) { 49 /* 50 * Standard compliance now requires the system to return EINVAL 51 * for munmap(addr, 0). Return success now to maintain 52 * backwards compatibility. 53 */ 54 return 0; 55 } 56 /* 57 * Page-align "addr" since the system now requires it 58 * for standards compliance. 59 * Update "len" to reflect the adjustment and still cover the same area. 60 */ 61 offset = ((uintptr_t) addr) & PAGE_MASK; 62 addr = (void *) (((uintptr_t) addr) & ~PAGE_MASK); 63 len += offset; 64 65 int result = __munmap(addr, len); 66 67 if (__syscall_logger) { 68 __syscall_logger(stack_logging_type_vm_deallocate, (uintptr_t)mach_task_self(), (uintptr_t)addr, len, 0, 0); 69 } 70 71 return result; 72} 73#endif /* NO_SYSCALL_LEGACY */ 74