1  /* Remap a virtual memory address.  Linux specific syscall.
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <sys/mman.h>
      20  #include <sysdep.h>
      21  #include <stdarg.h>
      22  #include <stddef.h>
      23  
      24  void *
      25  __mremap (void *addr, size_t old_len, size_t new_len, int flags, ...)
      26  {
      27    va_list va;
      28    void *new_addr = NULL;
      29  
      30    if (flags & MREMAP_FIXED)
      31      {
      32        va_start (va, flags);
      33        new_addr = va_arg (va, void *);
      34        va_end (va);
      35      }
      36  
      37    return (void *) INLINE_SYSCALL_CALL (mremap, addr, old_len, new_len, flags,
      38  				       new_addr);
      39  }
      40  libc_hidden_def (__mremap)
      41  weak_alias (__mremap, mremap)