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82 lines
2.3 KiB
82 lines
2.3 KiB
/* Create clone of a given descriptor.
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Copyright (C) 2003, 2004 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 2003.
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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 <assert.h>
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#include <stddef.h>
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#include "libelfP.h"
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#include "common.h"
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Elf *
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elf_clone (Elf *elf, Elf_Cmd cmd)
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{
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Elf *retval = NULL;
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if (elf == NULL)
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/* Some earlier mistake. */
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return NULL;
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/* Make sure the descriptor is not suddenly going away. */
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rwlock_rdlock (elf->lock);
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if (cmd != ELF_C_EMPTY)
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// XXX TODO handle ELF_C_READ/WRITE etc
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goto out;
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retval = allocate_elf (elf->fildes, elf->map_address, elf->start_offset,
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elf->maximum_size, elf->cmd, elf->parent, elf->kind,
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elf->state.elf32.scns.max * sizeof (Elf_Scn));
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if (retval != NULL)
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{
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/* We have to write to the file in any case. */
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retval->flags = ELF_F_DIRTY;
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/* Some more or less arbitrary value. */
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retval->state.elf.scnincr = 10;
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/* We have allocated room for some sections. */
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assert (offsetof (struct Elf, state.elf32.scns)
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== offsetof (struct Elf, state.elf64.scns));
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retval->state.elf.scns_last = &retval->state.elf32.scns;
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retval->state.elf32.scns.max = elf->state.elf32.scns.max;
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retval->class = elf->class;
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}
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/* Release the lock. */
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out:
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rwlock_unlock (elf->lock);
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return retval;
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}
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