sysdeps/unix/sysv/linux/mremap.c

   1 /* Remap a virtual memory address.  Linux specific syscall.
   2    Copyright (C) 2021-2024 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)