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/* Retrieve file identification data.
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Copyright (C) 1998, 1999, 2000, 2002, 2004, 2015 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 1998.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stddef.h>
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#include "libelfP.h"
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char *
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elf_getident (Elf *elf, size_t *ptr)
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{
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/* In case this is no ELF file, the handle is invalid and we return
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NULL. */
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if (elf == NULL || elf->kind != ELF_K_ELF)
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{
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if (ptr != NULL)
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*ptr = 0;
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return NULL;
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}
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/* We already read the ELF header. Return a pointer to it and store
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the length in *PTR. */
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if (ptr != NULL)
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*ptr = EI_NIDENT;
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return (char *) (elf->class == ELFCLASS32
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|| (offsetof (struct Elf, state.elf32.ehdr)
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== offsetof (struct Elf, state.elf64.ehdr))
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? elf->state.elf32.ehdr->e_ident
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: elf->state.elf64.ehdr->e_ident);
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}
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