mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 22:30:12 +00:00
900fa25736
The errlist.c is built with -fno-toplevel-reorder to avoid compiler to reorder the compat assembly directives due an assembler issue [1] (fixed on 2.39). This patch removes the compiler flags by split the compat symbol generation in two phases. First the _sys_errlist_internal internal without any compat symbol directive is preprocessed to generate an assembly source code. This generate assembly is then used as input on a platform agnostic errlist-data.S which then creates the compat definitions. This prevents compiler to move any compat directive prior the _sys_errlist_internal definition itself. Checked on a make check run-built-tests=no on all affected ABIs. [1] https://sourceware.org/bugzilla/show_bug.cgi?id=29012
53 lines
2.3 KiB
C
53 lines
2.3 KiB
C
/* Linux sys_errlist compatibility macro definitions.
|
|
Copyright (C) 2020-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _ERRLIST_COMPAT_H
|
|
#define _ERRLIST_COMPAT_H
|
|
|
|
#include <shlib-compat.h>
|
|
#include <limits.h>
|
|
|
|
/* Define new compat symbols for symbols _sys_errlist, sys_errlist,
|
|
_sys_nerr, and sys_nerr for version VERSION with NUMBERERR times number of
|
|
bytes per long int size.
|
|
Both _sys_errlist and sys_errlist alias to _sys_errlist_internal symbol
|
|
(defined on errlist.c) while _sys_nerr and sys_nerr created new variable
|
|
with the expected size. */
|
|
#ifdef __ASSEMBLER__
|
|
# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) \
|
|
declare_object_symbol_alias (__ ## VERSION ## _sys_errlist, \
|
|
_sys_errlist_internal, \
|
|
NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH)) \
|
|
ASM_LINE_SEP \
|
|
declare_object_symbol_alias (__ ## VERSION ## __sys_errlist, \
|
|
_sys_errlist_internal, \
|
|
NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH)) \
|
|
ASM_LINE_SEP \
|
|
compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION) \
|
|
ASM_LINE_SEP \
|
|
compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION)
|
|
#else
|
|
# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) \
|
|
const int __##VERSION##_sys_nerr = NUMBERERR; \
|
|
strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr); \
|
|
compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION); \
|
|
compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);
|
|
#endif
|
|
|
|
#endif
|