Blame sysdeps/x86_64/bsd-_setjmp.S

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/* BSD `_setjmp' entry point to `sigsetjmp (..., 0)'.  x86-64 version.
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   Copyright (C) 1994-2018 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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   <http://www.gnu.org/licenses/>.  */
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/* This just does a tail-call to `__sigsetjmp (ARG, 0)'.
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   We cannot do it in C because it must be a tail-call, so frame-unwinding
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   in setjmp doesn't clobber the state restored by longjmp.  */
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#include <sysdep.h>
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#define _ASM
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#define _SETJMP_H
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#include <bits/setjmp.h>
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ENTRY (_setjmp)
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	/* Set up arguments, we only need to set the second arg.  */
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	xorl %esi, %esi
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#ifdef PIC
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	jmp HIDDEN_JUMPTARGET (__sigsetjmp)
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#else
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	jmp __sigsetjmp
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#endif
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END (_setjmp)
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libc_hidden_def (_setjmp)