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fdaf78656f
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>
80 lines
3.0 KiB
C
80 lines
3.0 KiB
C
/* Enumerate available IFUNC implementations of a function. sparc version.
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Copyright (C) 2012-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <string.h>
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#include <wchar.h>
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#include <ldsodefs.h>
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#include <sysdep.h>
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#include <ifunc-impl-list.h>
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/* Fill ARRAY of MAX elements with IFUNC implementations for function
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NAME and return the number of valid entries. */
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size_t
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__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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size_t max)
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{
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size_t i = max;
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int hwcap;
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hwcap = GLRO(dl_hwcap);
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IFUNC_IMPL (i, name, memcpy,
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IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_ADP,
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__memcpy_niagara7)
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IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_CRYPTO,
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__memcpy_niagara4)
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IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_N2,
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__memcpy_niagara2)
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IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_BLKINIT,
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__memcpy_niagara1)
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IFUNC_IMPL_ADD (array, i, memcpy, hwcap & HWCAP_SPARC_ULTRA3,
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__memcpy_ultra3)
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ultra1));
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IFUNC_IMPL (i, name, mempcpy,
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IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_ADP,
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__mempcpy_niagara7)
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IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_CRYPTO,
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__mempcpy_niagara4)
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IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_N2,
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__mempcpy_niagara2)
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IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_BLKINIT,
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__mempcpy_niagara1)
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IFUNC_IMPL_ADD (array, i, mempcpy, hwcap & HWCAP_SPARC_ULTRA3,
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__mempcpy_ultra3)
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IFUNC_IMPL_ADD (array, i, mempcpy, 1, __mempcpy_ultra1));
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IFUNC_IMPL (i, name, memset,
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IFUNC_IMPL_ADD (array, i, memset, hwcap & HWCAP_SPARC_ADP,
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__memset_niagara7)
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IFUNC_IMPL_ADD (array, i, memset, hwcap & HWCAP_SPARC_CRYPTO,
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__memset_niagara4)
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IFUNC_IMPL_ADD (array, i, memset, hwcap & HWCAP_SPARC_BLKINIT,
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__memset_niagara1)
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IFUNC_IMPL_ADD (array, i, memset, 1, __memset_ultra1));
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IFUNC_IMPL (i, name, memmove,
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IFUNC_IMPL_ADD (array, i, memmove, hwcap & HWCAP_SPARC_ADP,
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__memmove_niagara7)
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IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_ultra1));
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return 0;
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}
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