mirror of
https://github.com/openharmony/third_party_elfutils.git
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lizhenlin
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/* Get the section index of the extended section index table.
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Copyright (C) 2007 Red Hat, Inc.
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Copyright (C) 2025 Mark J. Wielaard <mark@klomp.org>
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This file is part of elfutils.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.
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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 "libelfP.h"
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int
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elf_scnshndx (Elf_Scn *scn)
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{
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size_t scnndx;
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GElf_Shdr shdr_mem;
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GElf_Shdr *shdr;
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Elf *elf;
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Elf_Scn *nscn;
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if (scn == NULL)
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return -1;
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scnndx = scn->index;
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elf = scn->elf;
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shdr = gelf_getshdr (scn, &shdr_mem);
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if (shdr == NULL)
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return -1;
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/* Only SYMTAB sections can have a SHNDX section. */
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if (shdr->sh_type != SHT_SYMTAB)
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return 0;
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/* By convention the SHT_SYMTAB_SHNDX section is right after the the
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SHT_SYMTAB section, so start there. */
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nscn = scn;
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while ((nscn = elf_nextscn (elf, nscn)) != NULL)
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{
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shdr = gelf_getshdr (nscn, &shdr_mem);
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if (shdr == NULL)
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return -1;
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if (shdr->sh_type == SHT_SYMTAB_SHNDX && shdr->sh_link == scnndx)
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return nscn->index;
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}
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/* OK, not found, start from the top. */
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nscn = NULL;
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while ((nscn = elf_nextscn (elf, nscn)) != NULL
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&& nscn->index != scnndx)
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{
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shdr = gelf_getshdr (nscn, &shdr_mem);
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if (shdr == NULL)
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return -1;
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if (shdr->sh_type == SHT_SYMTAB_SHNDX && shdr->sh_link == scnndx)
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return nscn->index;
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}
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/* No shndx found, but no errors. */
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return 0;
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}
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INTDEF(elf_scnshndx)
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