sysdeps/unix/sysv/linux/errlist-compat.h

   1 /* Linux sys_errlist compatibility macro definitions.
   2    Copyright (C) 2020-2024 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 #ifndef _ERRLIST_COMPAT_H
  20 #define _ERRLIST_COMPAT_H
  21
  22 #include <shlib-compat.h>
  23 #include <limits.h>
  24
  25 /* Define new compat symbols for symbols  _sys_errlist, sys_errlist,
  26    _sys_nerr, and sys_nerr for version VERSION with NUMBERERR times number of
  27    bytes per long int size.
  28    Both _sys_errlist and sys_errlist alias to _sys_errlist_internal symbol
  29    (defined on errlist.c) while _sys_nerr and sys_nerr created new variable
  30    with the expected size.  */
  31 #ifdef __ASSEMBLER__
  32 # define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION)                          \
  33   declare_object_symbol_alias (__ ## VERSION ## _sys_errlist,               \
  34                                _sys_errlist_internal,                       \
  35                                NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH))     \
  36                                ASM_LINE_SEP                                 \
  37   declare_object_symbol_alias (__ ## VERSION ## __sys_errlist,              \
  38                                _sys_errlist_internal,                       \
  39                                NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH))     \
  40                                ASM_LINE_SEP                                 \
  41   compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION)  \
  42                  ASM_LINE_SEP                                               \
  43   compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION)
  44 #else
  45 # define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION)                          \
  46   const int __##VERSION##_sys_nerr = NUMBERERR;                             \
  47   strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr);           \
  48   compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION);       \
  49   compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);
  50 #endif
  51
  52 #endif