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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.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _ERRLIST_COMPAT_H
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#define _ERRLIST_COMPAT_H
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#include <shlib-compat.h>
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#include <limits.h>
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/* Define new compat symbols for symbols _sys_errlist, sys_errlist,
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_sys_nerr, and sys_nerr for version VERSION with NUMBERERR times number of
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bytes per long int size.
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Both _sys_errlist and sys_errlist alias to _sys_errlist_internal symbol
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(defined on errlist.c) while _sys_nerr and sys_nerr created new variable
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with the expected size. */
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#ifdef __ASSEMBLER__
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# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) \
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declare_object_symbol_alias (__ ## VERSION ## _sys_errlist, \
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_sys_errlist_internal, \
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NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH)) \
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ASM_LINE_SEP \
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declare_object_symbol_alias (__ ## VERSION ## __sys_errlist, \
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_sys_errlist_internal, \
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NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH)) \
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ASM_LINE_SEP \
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compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION) \
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ASM_LINE_SEP \
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compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION)
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#else
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# define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION) \
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const int __##VERSION##_sys_nerr = NUMBERERR; \
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strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr); \
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compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION); \
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compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);
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#endif
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#endif
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