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https://github.com/autc04/Retro68.git
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122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* Return build ID information for a module.
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Copyright (C) 2007-2010, 2014 Red Hat, Inc.
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This file is part of elfutils.
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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 "libdwflP.h"
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static int
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found_build_id (Dwfl_Module *mod, bool set,
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const void *bits, int len, GElf_Addr vaddr)
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{
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if (!set)
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/* When checking bits, we do not compare VADDR because the
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address found in a debuginfo file may not match the main
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file as modified by prelink. */
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return 1 + (mod->build_id_len == len
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&& !memcmp (bits, mod->build_id_bits, len));
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void *copy = malloc (len);
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if (unlikely (copy == NULL))
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{
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__libdwfl_seterrno (DWFL_E_NOMEM);
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return -1;
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}
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mod->build_id_bits = memcpy (copy, bits, len);
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mod->build_id_vaddr = vaddr;
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mod->build_id_len = len;
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return len;
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}
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int
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internal_function
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__libdwfl_find_build_id (Dwfl_Module *mod, bool set, Elf *elf)
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{
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const void *build_id_bits;
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GElf_Addr build_id_elfaddr;
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int build_id_len;
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/* For mod == NULL use dwelf_elf_gnu_build_id directly. */
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assert (mod != NULL);
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int result = __libdwfl_find_elf_build_id (mod, elf, &build_id_bits,
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&build_id_elfaddr, &build_id_len);
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if (result <= 0)
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return result;
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GElf_Addr build_id_vaddr = build_id_elfaddr + (build_id_elfaddr != 0
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? mod->main_bias : 0);
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return found_build_id (mod, set, build_id_bits, build_id_len, build_id_vaddr);
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}
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int
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dwfl_module_build_id (Dwfl_Module *mod,
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const unsigned char **bits, GElf_Addr *vaddr)
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{
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if (mod == NULL)
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return -1;
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if (mod->build_id_len == 0 && mod->main.elf != NULL)
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{
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/* We have the file, but have not examined it yet. */
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int result = __libdwfl_find_build_id (mod, true, mod->main.elf);
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if (result <= 0)
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{
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mod->build_id_len = -1; /* Cache negative result. */
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return result;
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}
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}
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if (mod->build_id_len <= 0)
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return 0;
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*bits = mod->build_id_bits;
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*vaddr = mod->build_id_vaddr;
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return mod->build_id_len;
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}
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INTDEF (dwfl_module_build_id)
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NEW_VERSION (dwfl_module_build_id, ELFUTILS_0.138)
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#ifdef SYMBOL_VERSIONING
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COMPAT_VERSION (dwfl_module_build_id, ELFUTILS_0.130, vaddr_at_end)
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int
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_compat_vaddr_at_end_dwfl_module_build_id (Dwfl_Module *mod,
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const unsigned char **bits,
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GElf_Addr *vaddr)
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{
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int result = INTUSE(dwfl_module_build_id) (mod, bits, vaddr);
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if (result > 0)
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*vaddr += (result + 3) & -4;
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return result;
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}
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#endif
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