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glibc/sysdeps/i386/i686/multiarch/ifunc-impl-list.c
Wilco Dijkstra fdaf78656f Add bounds check to __libc_ifunc_impl_list 
Add a proper bounds check to __libc_ifunc_impl_list. This makes MAX_IFUNC
redundant and fixes several targets that will write outside the array.
To avoid unnecessary large diffs, pass the maximum in the argument 'i' to
IFUNC_IMPL_ADD - 'max' can be used in new ifunc definitions and existing
ones can be updated if desired.

Passes buildmanyglibc.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
2022-06-10 17:13:29 +01:00

358 lines
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/* Enumerate available IFUNC implementations of a function. i686 version.
Copyright (C) 2012-2022 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/>. */
#include <assert.h>
#include <string.h>
#include <wchar.h>
#include <ifunc-impl-list.h>
#include "init-arch.h"
/* Fill ARRAY of MAX elements with IFUNC implementations for function
NAME and return the number of valid entries. */
size_t
__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
size_t max)
{
size_t i = max;
/* Support sysdeps/i386/i686/multiarch/memchr.S. */
IFUNC_IMPL (i, name, memchr,
IFUNC_IMPL_ADD (array, i, memchr, CPU_FEATURE_USABLE (SSE2),
__memchr_sse2_bsf)
IFUNC_IMPL_ADD (array, i, memchr, CPU_FEATURE_USABLE (SSE2),
__memchr_sse2)
IFUNC_IMPL_ADD (array, i, memchr, 1, __memchr_ia32))
/* Support sysdeps/i386/i686/multiarch/memcmp.S. */
IFUNC_IMPL (i, name, memcmp,
IFUNC_IMPL_ADD (array, i, memcmp, CPU_FEATURE_USABLE (SSE4_2),
__memcmp_sse4_2)
IFUNC_IMPL_ADD (array, i, memcmp, CPU_FEATURE_USABLE (SSSE3),
__memcmp_ssse3)
IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ia32))
#ifdef SHARED
/* Support sysdeps/i386/i686/multiarch/memmove_chk.S. */
IFUNC_IMPL (i, name, __memmove_chk,
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (SSSE3),
__memmove_chk_ssse3_rep)
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (SSSE3),
__memmove_chk_ssse3)
IFUNC_IMPL_ADD (array, i, __memmove_chk,
CPU_FEATURE_USABLE (SSE2),
__memmove_chk_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, __memmove_chk, 1,
__memmove_chk_ia32))
/* Support sysdeps/i386/i686/multiarch/memmove.S. */
IFUNC_IMPL (i, name, memmove,
IFUNC_IMPL_ADD (array, i, memmove, CPU_FEATURE_USABLE (SSSE3),
__memmove_ssse3_rep)
IFUNC_IMPL_ADD (array, i, memmove, CPU_FEATURE_USABLE (SSSE3),
__memmove_ssse3)
IFUNC_IMPL_ADD (array, i, memmove, CPU_FEATURE_USABLE (SSE2),
__memmove_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_ia32))
#endif
/* Support sysdeps/i386/i686/multiarch/memrchr.S. */
IFUNC_IMPL (i, name, memrchr,
IFUNC_IMPL_ADD (array, i, memrchr, CPU_FEATURE_USABLE (SSE2),
__memrchr_sse2_bsf)
IFUNC_IMPL_ADD (array, i, memrchr, CPU_FEATURE_USABLE (SSE2),
__memrchr_sse2)
IFUNC_IMPL_ADD (array, i, memrchr, 1, __memrchr_ia32))
#ifdef SHARED
/* Support sysdeps/i386/i686/multiarch/memset_chk.S. */
IFUNC_IMPL (i, name, __memset_chk,
IFUNC_IMPL_ADD (array, i, __memset_chk,
CPU_FEATURE_USABLE (SSE2),
__memset_chk_sse2_rep)
IFUNC_IMPL_ADD (array, i, __memset_chk,
CPU_FEATURE_USABLE (SSE2),
__memset_chk_sse2)
IFUNC_IMPL_ADD (array, i, __memset_chk, 1,
__memset_chk_ia32))
#endif
/* Support sysdeps/i386/i686/multiarch/memset.S. */
IFUNC_IMPL (i, name, memset,
IFUNC_IMPL_ADD (array, i, memset, CPU_FEATURE_USABLE (SSE2),
__memset_sse2_rep)
IFUNC_IMPL_ADD (array, i, memset, CPU_FEATURE_USABLE (SSE2),
__memset_sse2)
IFUNC_IMPL_ADD (array, i, memset, 1, __memset_ia32))
/* Support sysdeps/i386/i686/multiarch/rawmemchr.S. */
IFUNC_IMPL (i, name, rawmemchr,
IFUNC_IMPL_ADD (array, i, rawmemchr, CPU_FEATURE_USABLE (SSE2),
__rawmemchr_sse2_bsf)
IFUNC_IMPL_ADD (array, i, rawmemchr, CPU_FEATURE_USABLE (SSE2),
__rawmemchr_sse2)
IFUNC_IMPL_ADD (array, i, rawmemchr, 1, __rawmemchr_ia32))
/* Support sysdeps/i386/i686/multiarch/stpncpy.S. */
IFUNC_IMPL (i, name, stpncpy,
IFUNC_IMPL_ADD (array, i, stpncpy, CPU_FEATURE_USABLE (SSSE3),
__stpncpy_ssse3)
IFUNC_IMPL_ADD (array, i, stpncpy, CPU_FEATURE_USABLE (SSE2),
__stpncpy_sse2)
IFUNC_IMPL_ADD (array, i, stpncpy, 1, __stpncpy_ia32))
/* Support sysdeps/i386/i686/multiarch/stpcpy.S. */
IFUNC_IMPL (i, name, stpcpy,
IFUNC_IMPL_ADD (array, i, stpcpy, CPU_FEATURE_USABLE (SSSE3),
__stpcpy_ssse3)
IFUNC_IMPL_ADD (array, i, stpcpy, CPU_FEATURE_USABLE (SSE2),
__stpcpy_sse2)
IFUNC_IMPL_ADD (array, i, stpcpy, 1, __stpcpy_ia32))
/* Support sysdeps/i386/i686/multiarch/strcasecmp.S. */
IFUNC_IMPL (i, name, strcasecmp,
IFUNC_IMPL_ADD (array, i, strcasecmp,
CPU_FEATURE_USABLE (SSE4_2),
__strcasecmp_sse4_2)
IFUNC_IMPL_ADD (array, i, strcasecmp,
CPU_FEATURE_USABLE (SSSE3),
__strcasecmp_ssse3)
IFUNC_IMPL_ADD (array, i, strcasecmp, 1, __strcasecmp_ia32))
/* Support sysdeps/i386/i686/multiarch/strcasecmp_l.S. */
IFUNC_IMPL (i, name, strcasecmp_l,
IFUNC_IMPL_ADD (array, i, strcasecmp_l,
CPU_FEATURE_USABLE (SSE4_2),
__strcasecmp_l_sse4_2)
IFUNC_IMPL_ADD (array, i, strcasecmp_l,
CPU_FEATURE_USABLE (SSSE3),
__strcasecmp_l_ssse3)
IFUNC_IMPL_ADD (array, i, strcasecmp_l, 1,
__strcasecmp_l_ia32))
/* Support sysdeps/i386/i686/multiarch/strcat.S. */
IFUNC_IMPL (i, name, strcat,
IFUNC_IMPL_ADD (array, i, strcat, CPU_FEATURE_USABLE (SSSE3),
__strcat_ssse3)
IFUNC_IMPL_ADD (array, i, strcat, CPU_FEATURE_USABLE (SSE2),
__strcat_sse2)
IFUNC_IMPL_ADD (array, i, strcat, 1, __strcat_ia32))
/* Support sysdeps/i386/i686/multiarch/strchr.S. */
IFUNC_IMPL (i, name, strchr,
IFUNC_IMPL_ADD (array, i, strchr, CPU_FEATURE_USABLE (SSE2),
__strchr_sse2_bsf)
IFUNC_IMPL_ADD (array, i, strchr, CPU_FEATURE_USABLE (SSE2),
__strchr_sse2)
IFUNC_IMPL_ADD (array, i, strchr, 1, __strchr_ia32))
/* Support sysdeps/i386/i686/multiarch/strcmp.S. */
IFUNC_IMPL (i, name, strcmp,
IFUNC_IMPL_ADD (array, i, strcmp, CPU_FEATURE_USABLE (SSE4_2),
__strcmp_sse4_2)
IFUNC_IMPL_ADD (array, i, strcmp, CPU_FEATURE_USABLE (SSSE3),
__strcmp_ssse3)
IFUNC_IMPL_ADD (array, i, strcmp, 1, __strcmp_ia32))
/* Support sysdeps/i386/i686/multiarch/strcpy.S. */
IFUNC_IMPL (i, name, strcpy,
IFUNC_IMPL_ADD (array, i, strcpy, CPU_FEATURE_USABLE (SSSE3),
__strcpy_ssse3)
IFUNC_IMPL_ADD (array, i, strcpy, CPU_FEATURE_USABLE (SSE2),
__strcpy_sse2)
IFUNC_IMPL_ADD (array, i, strcpy, 1, __strcpy_ia32))
/* Support sysdeps/i386/i686/multiarch/strcspn.S. */
IFUNC_IMPL (i, name, strcspn,
IFUNC_IMPL_ADD (array, i, strcspn, CPU_FEATURE_USABLE (SSE4_2),
__strcspn_sse42)
IFUNC_IMPL_ADD (array, i, strcspn, 1, __strcspn_ia32))
/* Support sysdeps/i386/i686/multiarch/strncase.S. */
IFUNC_IMPL (i, name, strncasecmp,
IFUNC_IMPL_ADD (array, i, strncasecmp,
CPU_FEATURE_USABLE (SSE4_2),
__strncasecmp_sse4_2)
IFUNC_IMPL_ADD (array, i, strncasecmp,
CPU_FEATURE_USABLE (SSSE3),
__strncasecmp_ssse3)
IFUNC_IMPL_ADD (array, i, strncasecmp, 1,
__strncasecmp_ia32))
/* Support sysdeps/i386/i686/multiarch/strncase_l.S. */
IFUNC_IMPL (i, name, strncasecmp_l,
IFUNC_IMPL_ADD (array, i, strncasecmp_l,
CPU_FEATURE_USABLE (SSE4_2),
__strncasecmp_l_sse4_2)
IFUNC_IMPL_ADD (array, i, strncasecmp_l,
CPU_FEATURE_USABLE (SSSE3),
__strncasecmp_l_ssse3)
IFUNC_IMPL_ADD (array, i, strncasecmp_l, 1,
__strncasecmp_l_ia32))
/* Support sysdeps/i386/i686/multiarch/strncat.S. */
IFUNC_IMPL (i, name, strncat,
IFUNC_IMPL_ADD (array, i, strncat, CPU_FEATURE_USABLE (SSSE3),
__strncat_ssse3)
IFUNC_IMPL_ADD (array, i, strncat, CPU_FEATURE_USABLE (SSE2),
__strncat_sse2)
IFUNC_IMPL_ADD (array, i, strncat, 1, __strncat_ia32))
/* Support sysdeps/i386/i686/multiarch/strncpy.S. */
IFUNC_IMPL (i, name, strncpy,
IFUNC_IMPL_ADD (array, i, strncpy, CPU_FEATURE_USABLE (SSSE3),
__strncpy_ssse3)
IFUNC_IMPL_ADD (array, i, strncpy, CPU_FEATURE_USABLE (SSE2),
__strncpy_sse2)
IFUNC_IMPL_ADD (array, i, strncpy, 1, __strncpy_ia32))
/* Support sysdeps/i386/i686/multiarch/strnlen.S. */
IFUNC_IMPL (i, name, strnlen,
IFUNC_IMPL_ADD (array, i, strnlen, CPU_FEATURE_USABLE (SSE2),
__strnlen_sse2)
IFUNC_IMPL_ADD (array, i, strnlen, 1, __strnlen_ia32))
/* Support sysdeps/i386/i686/multiarch/strpbrk.S. */
IFUNC_IMPL (i, name, strpbrk,
IFUNC_IMPL_ADD (array, i, strpbrk, CPU_FEATURE_USABLE (SSE4_2),
__strpbrk_sse42)
IFUNC_IMPL_ADD (array, i, strpbrk, 1, __strpbrk_ia32))
/* Support sysdeps/i386/i686/multiarch/strrchr.S. */
IFUNC_IMPL (i, name, strrchr,
IFUNC_IMPL_ADD (array, i, strrchr, CPU_FEATURE_USABLE (SSE2),
__strrchr_sse2_bsf)
IFUNC_IMPL_ADD (array, i, strrchr, CPU_FEATURE_USABLE (SSE2),
__strrchr_sse2)
IFUNC_IMPL_ADD (array, i, strrchr, 1, __strrchr_ia32))
/* Support sysdeps/i386/i686/multiarch/strspn.S. */
IFUNC_IMPL (i, name, strspn,
IFUNC_IMPL_ADD (array, i, strspn, CPU_FEATURE_USABLE (SSE4_2),
__strspn_sse42)
IFUNC_IMPL_ADD (array, i, strspn, 1, __strspn_ia32))
/* Support sysdeps/i386/i686/multiarch/wcschr.S. */
IFUNC_IMPL (i, name, wcschr,
IFUNC_IMPL_ADD (array, i, wcschr, CPU_FEATURE_USABLE (SSE2),
__wcschr_sse2)
IFUNC_IMPL_ADD (array, i, wcschr, 1, __wcschr_ia32))
/* Support sysdeps/i386/i686/multiarch/wcscmp.S. */
IFUNC_IMPL (i, name, wcscmp,
IFUNC_IMPL_ADD (array, i, wcscmp, CPU_FEATURE_USABLE (SSE2),
__wcscmp_sse2)
IFUNC_IMPL_ADD (array, i, wcscmp, 1, __wcscmp_ia32))
/* Support sysdeps/i386/i686/multiarch/wcscpy.S. */
IFUNC_IMPL (i, name, wcscpy,
IFUNC_IMPL_ADD (array, i, wcscpy, CPU_FEATURE_USABLE (SSSE3),
__wcscpy_ssse3)
IFUNC_IMPL_ADD (array, i, wcscpy, 1, __wcscpy_ia32))
/* Support sysdeps/i386/i686/multiarch/wcslen.S. */
IFUNC_IMPL (i, name, wcslen,
IFUNC_IMPL_ADD (array, i, wcslen, CPU_FEATURE_USABLE (SSE2),
__wcslen_sse2)
IFUNC_IMPL_ADD (array, i, wcslen, 1, __wcslen_ia32))
/* Support sysdeps/i386/i686/multiarch/wcsrchr.S. */
IFUNC_IMPL (i, name, wcsrchr,
IFUNC_IMPL_ADD (array, i, wcsrchr, CPU_FEATURE_USABLE (SSE2),
__wcsrchr_sse2)
IFUNC_IMPL_ADD (array, i, wcsrchr, 1, __wcsrchr_ia32))
/* Support sysdeps/i386/i686/multiarch/wmemcmp.S. */
IFUNC_IMPL (i, name, wmemcmp,
IFUNC_IMPL_ADD (array, i, wmemcmp, CPU_FEATURE_USABLE (SSE4_2),
__wmemcmp_sse4_2)
IFUNC_IMPL_ADD (array, i, wmemcmp, CPU_FEATURE_USABLE (SSSE3),
__wmemcmp_ssse3)
IFUNC_IMPL_ADD (array, i, wmemcmp, 1, __wmemcmp_ia32))
#ifdef SHARED
/* Support sysdeps/i386/i686/multiarch/memcpy_chk.S. */
IFUNC_IMPL (i, name, __memcpy_chk,
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__memcpy_chk_ssse3_rep)
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__memcpy_chk_ssse3)
IFUNC_IMPL_ADD (array, i, __memcpy_chk,
CPU_FEATURE_USABLE (SSE2),
__memcpy_chk_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, __memcpy_chk, 1,
__memcpy_chk_ia32))
/* Support sysdeps/i386/i686/multiarch/memcpy.S. */
IFUNC_IMPL (i, name, memcpy,
IFUNC_IMPL_ADD (array, i, memcpy, CPU_FEATURE_USABLE (SSSE3),
__memcpy_ssse3_rep)
IFUNC_IMPL_ADD (array, i, memcpy, CPU_FEATURE_USABLE (SSSE3),
__memcpy_ssse3)
IFUNC_IMPL_ADD (array, i, memcpy, CPU_FEATURE_USABLE (SSE2),
__memcpy_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ia32))
/* Support sysdeps/i386/i686/multiarch/mempcpy_chk.S. */
IFUNC_IMPL (i, name, __mempcpy_chk,
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__mempcpy_chk_ssse3_rep)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (SSSE3),
__mempcpy_chk_ssse3)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk,
CPU_FEATURE_USABLE (SSE2),
__mempcpy_chk_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, __mempcpy_chk, 1,
__mempcpy_chk_ia32))
/* Support sysdeps/i386/i686/multiarch/mempcpy.S. */
IFUNC_IMPL (i, name, mempcpy,
IFUNC_IMPL_ADD (array, i, mempcpy, CPU_FEATURE_USABLE (SSSE3),
__mempcpy_ssse3_rep)
IFUNC_IMPL_ADD (array, i, mempcpy, CPU_FEATURE_USABLE (SSSE3),
__mempcpy_ssse3)
IFUNC_IMPL_ADD (array, i, mempcpy, CPU_FEATURE_USABLE (SSE2),
__mempcpy_sse2_unaligned)
IFUNC_IMPL_ADD (array, i, mempcpy, 1, __mempcpy_ia32))
/* Support sysdeps/i386/i686/multiarch/strlen.S. */
IFUNC_IMPL (i, name, strlen,
IFUNC_IMPL_ADD (array, i, strlen, CPU_FEATURE_USABLE (SSE2),
__strlen_sse2_bsf)
IFUNC_IMPL_ADD (array, i, strlen, CPU_FEATURE_USABLE (SSE2),
__strlen_sse2)
IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_ia32))
/* Support sysdeps/i386/i686/multiarch/strncmp.S. */
IFUNC_IMPL (i, name, strncmp,
IFUNC_IMPL_ADD (array, i, strncmp, CPU_FEATURE_USABLE (SSE4_2),
__strncmp_sse4_2)
IFUNC_IMPL_ADD (array, i, strncmp, CPU_FEATURE_USABLE (SSSE3),
__strncmp_ssse3)
IFUNC_IMPL_ADD (array, i, strncmp, 1, __strncmp_ia32))
#endif
return 0;
}
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