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i386: Fix build with --enable-fortify=3

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The i386 string routines provide multiple internal definitions
for memcpy, memmove, and mempcpy chk routines:

  $ objdump -t libc.a | grep __memcpy_chk
  00000000 g     F .text  0000000e __memcpy_chk
  00000000 g     F .text  00000013 __memcpy_chk
  $ objdump -t libc.a | grep __mempcpy_chk
  00000000 g     F .text  0000000e __mempcpy_chk
  00000000 g     F .text  00000013 __mempcpy_chk
  $ objdump -t libc.a | grep __memmove_chk
  00000000 g     F .text  0000000e __memmove_chk
  00000000 g     F .text  00000013 __memmove_chk

Although is not an issue for normal static builds, with fortify=3
glibc itself might use the fortify chk functions and thus static
build might fail with multiple definitions.  For instance:

x86_64-glibc-linux-gnu-gcc -m32 -march=i686 -o [...]math/test-signgam-uchar-static -nostdlib -nostartfiles -static -static-pie [...]
x86_64-glibc-linux-gnu/bin/ld: [...]/libc.a(mempcpy-ia32.o):
in function `__mempcpy_chk': [...]/glibc-git/string/../sysdeps/i386/i686/mempcpy.S:32: multiple definition of `__mempcpy_chk';
[...]/libc.a(mempcpy_chk-nonshared.o):[...]/debug/../sysdeps/i386/mempcpy_chk.S:28: first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [../Rules:298:

There is no need for mem*-nonshared.S, the __mem*_chk routines
are already provided by the assembly routines.

Checked on i686-linux-gnu with gcc 13 built with fortify=1,2,3 and
without fortify.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella Netto 2023-07-25 12:16:38 -03:00 committed by Adhemerval Zanella
parent df43ea489c
commit f8f9a27257
4 changed files with 1 additions and 65 deletions
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3
sysdeps/i386/i686/multiarch/Makefile
View File

@ -46,6 +46,5 @@ CFLAGS-s_fmaf-fma.c += -mavx -mfpmath=sse
endif
ifeq ($(subdir),debug)
sysdep_routines += memcpy_chk-nonshared mempcpy_chk-nonshared \
memmove_chk-nonshared memset_chk-nonshared
sysdep_routines += memset_chk-nonshared
endif

21
sysdeps/i386/i686/multiarch/memcpy_chk-nonshared.S
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@ -1,21 +0,0 @@
/* Non-shared version of memcpy_chk for i686.
Copyright (C) 2017-2023 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/>. */
#if IS_IN (libc) && !defined SHARED
# include <sysdeps/i386/memcpy_chk.S>
#endif

21
sysdeps/i386/i686/multiarch/memmove_chk-nonshared.S
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@ -1,21 +0,0 @@
/* Non-shared version of memmmove_chk for i686.
Copyright (C) 2017-2023 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/>. */
#if IS_IN (libc) && !defined SHARED
# include <sysdeps/i386/memmove_chk.S>
#endif

21
sysdeps/i386/i686/multiarch/mempcpy_chk-nonshared.S
View File

@ -1,21 +0,0 @@
/* Non-shared version of mempcpy_chk for i686.
Copyright (C) 2017-2023 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/>. */
#if IS_IN (libc) && !defined SHARED
# include <sysdeps/i386/mempcpy_chk.S>
#endif