mremap.cpp revision 4200e260d266fd0c176e71fbd720d0bab04b02db
11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 24200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay * Copyright (C) 2015 The Android Open Source Project 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * * Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * the documentation and/or other materials provided with the 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * distribution. 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 284200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay 294200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay#include <sys/mman.h> 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <stdarg.h> 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 324200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micayextern "C" void* ___mremap(void*, size_t, size_t, int, void*); 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 344200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micayvoid* mremap(void* old_address, size_t old_size, size_t new_size, int flags, ...) { 354200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay void* new_address = nullptr; 364200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay // The optional argument is only valid if the MREMAP_FIXED flag is set, 374200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay // so we assume it's not present otherwise. 384200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay if ((flags & MREMAP_FIXED) != 0) { 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project va_list ap; 404200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay va_start(ap, flags); 414200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay new_address = va_arg(ap, void*); 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project va_end(ap); 434200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay } 444200e260d266fd0c176e71fbd720d0bab04b02dbDaniel Micay return ___mremap(old_address, old_size, new_size, flags, new_address); 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 46