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Diffstat (limited to 'sysdeps/generic/memmove_chk.c')
| -rw-r--r-- | sysdeps/generic/memmove_chk.c | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/sysdeps/generic/memmove_chk.c b/sysdeps/generic/memmove_chk.c deleted file mode 100644 index f3b74d23d9..0000000000 --- a/sysdeps/generic/memmove_chk.c +++ /dev/null @@ -1,98 +0,0 @@ -/* Copy memory to memory until the specified number of bytes - has been copied with error checking. Overlap is handled correctly. - Copyright (C) 1991,1995,1996,1997,2003,2004 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Torbjorn Granlund (tege@sics.se). - - 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <string.h> -#include <memcopy.h> -#include <pagecopy.h> - -void * -__memmove_chk (dest, src, len, destlen) - void *dest; - const void *src; - size_t len; - size_t destlen; -{ - if (__builtin_expect (destlen < len, 0)) - __chk_fail (); - - unsigned long int dstp = (long int) dest; - unsigned long int srcp = (long int) src; - - /* This test makes the forward copying code be used whenever possible. - Reduces the working set. */ - if (dstp - srcp >= len) /* *Unsigned* compare! */ - { - /* Copy from the beginning to the end. */ - - /* If there not too few bytes to copy, use word copy. */ - if (len >= OP_T_THRES) - { - /* Copy just a few bytes to make DSTP aligned. */ - len -= (-dstp) % OPSIZ; - BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ); - - /* Copy whole pages from SRCP to DSTP by virtual address - manipulation, as much as possible. */ - - PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len); - - /* Copy from SRCP to DSTP taking advantage of the known - alignment of DSTP. Number of bytes remaining is put - in the third argument, i.e. in LEN. This number may - vary from machine to machine. */ - - WORD_COPY_FWD (dstp, srcp, len, len); - - /* Fall out and copy the tail. */ - } - - /* There are just a few bytes to copy. Use byte memory operations. */ - BYTE_COPY_FWD (dstp, srcp, len); - } - else - { - /* Copy from the end to the beginning. */ - srcp += len; - dstp += len; - - /* If there not too few bytes to copy, use word copy. */ - if (len >= OP_T_THRES) - { - /* Copy just a few bytes to make DSTP aligned. */ - len -= dstp % OPSIZ; - BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ); - - /* Copy from SRCP to DSTP taking advantage of the known - alignment of DSTP. Number of bytes remaining is put - in the third argument, i.e. in LEN. This number may - vary from machine to machine. */ - - WORD_COPY_BWD (dstp, srcp, len, len); - - /* Fall out and copy the tail. */ - } - - /* There are just a few bytes to copy. Use byte memory operations. */ - BYTE_COPY_BWD (dstp, srcp, len); - } - - return dest; -} |