From d226114b9bfce2ea729f9c7b736aa5d509b2a73c Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 27 Aug 2015 09:04:40 -0700 Subject: Add i386 memset and memcpy assembly functions Add i386 memset and memcpy assembly functions with REP MOVSB/STOSB instructions. * sysdeps/i386/bcopy.S: New file. * sysdeps/i386/bzero.S: Likewise. * sysdeps/i386/memcpy.S: Likewise. * sysdeps/i386/memmove.S: Likewise. * sysdeps/i386/mempcpy.S: Likewise. * sysdeps/i386/memset.S: Likewise. * sysdeps/i386/bzero.c: Removed. * sysdeps/i386/memset.c: Likewise. * sysdeps/i386/i586/memcpy_chk.S: Likewise. * sysdeps/i386/i586/mempcpy_chk.S: Likewise. * sysdeps/i386/i586/memset_chk.S: Likewise. * sysdeps/i386/i686/memcpy_chk.S: Moved to ... * sysdeps/i386/memcpy_chk.S: Here. * sysdeps/i386/i686/memmove_chk.S: Moved to ... * sysdeps/i386/memmove_chk.S: Here. * sysdeps/i386/i686/mempcpy_chk.S: Moved to ... * sysdeps/i386/mempcpy_chk.S: Likewise. * sysdeps/i386/i686/memset_chk.S: Moved to ... * sysdeps/i386/memset_chk.S: Likewise. --- sysdeps/i386/memcpy_chk.S | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 sysdeps/i386/memcpy_chk.S (limited to 'sysdeps/i386/memcpy_chk.S') diff --git a/sysdeps/i386/memcpy_chk.S b/sysdeps/i386/memcpy_chk.S new file mode 100644 index 0000000000..b3b25de33c --- /dev/null +++ b/sysdeps/i386/memcpy_chk.S @@ -0,0 +1,34 @@ +/* Checking memcpy for i386. + Copyright (C) 2004-2015 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 + . */ + +#ifndef SHARED +# include +# include "asm-syntax.h" + + /* For libc.so this is defined in memcpy.S. + For libc.a, this is a separate source to avoid + memcpy bringing in __chk_fail and all routines + it calls. */ + .text +ENTRY (__memcpy_chk) + movl 12(%esp), %eax + cmpl %eax, 16(%esp) + jb __chk_fail + jmp memcpy +END (__memcpy_chk) +#endif -- cgit v1.2.3