6fad891dfd
The siglist.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_siglist and __sys_sigabbrev 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 siglist.S which then creates the compat definitions. This prevents compiler to move any compat directive prior the _sys_errlist definition itself. Checked on a make check run-built-tests=no on all affected ABIs. Reviewed-by: Fangrui Song <maskray@google.com>
51 lines
2.2 KiB
C
51 lines
2.2 KiB
C
/* Generic siglist 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 _SIGLIST_COMPAT_H
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#define _SIGLIST_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 sys_siglist, _sys_siglist, and sys_sigabbrev
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for version VERSION with NUMBERSIG times the number of bytes per long int.
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Both _sys_siglist and sys_siglist alias to __sys_siglist while
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sys_sigabbrev alias to __sys_sigabbrev. Both target alias are
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define in siglist.c. */
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#define DEFINE_COMPAT_SIGLIST(NUMBERSIG, VERSION) \
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declare_object_symbol_alias (__ ## VERSION ## _sys_siglist, \
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__sys_siglist, \
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NUMBERSIG * (ULONG_WIDTH / UCHAR_WIDTH)) \
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ASM_LINE_SEP \
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declare_object_symbol_alias (__ ## VERSION ## sys_siglist, \
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__sys_siglist, \
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NUMBERSIG * (ULONG_WIDTH / UCHAR_WIDTH)) \
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ASM_LINE_SEP \
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declare_object_symbol_alias (__ ## VERSION ## _sys_sigabbrev, \
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__sys_sigabbrev, \
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NUMBERSIG * (ULONG_WIDTH / UCHAR_WIDTH)) \
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ASM_LINE_SEP \
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compat_symbol (libc, __## VERSION ## _sys_siglist, _sys_siglist, \
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VERSION) ASM_LINE_SEP \
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compat_symbol (libc, __## VERSION ## sys_siglist, sys_siglist, \
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VERSION) ASM_LINE_SEP \
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compat_symbol (libc, __## VERSION ## _sys_sigabbrev, sys_sigabbrev, \
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VERSION)
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#endif
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