sysdeps/i386/memmove_chk.S


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/* Checking memmove for i386
   Copyright (C) 2004-2020 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 SHARED
# include <sysdep.h>
# include "asm-syntax.h"

/* For libc.so this is defined in memmove.S.  For libc.a, this is a
   separate source to avoid memmove bringing in __chk_fail and all
   routines it calls.  */
        .text
ENTRY (__memmove_chk)
	movl	12(%esp), %eax
	cmpl	%eax, 16(%esp)
	jb	__chk_fail
	jmp	memmove
END (__memmove_chk)
#endif