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1 : : /* Resolve symbol values through .opd function descriptors.
2 : : Copyright (C) 2013 Red Hat, Inc.
3 : : This file is part of elfutils.
4 : :
5 : : This file is free software; you can redistribute it and/or modify
6 : : it under the terms of either
7 : :
8 : : * the GNU Lesser General Public License as published by the Free
9 : : Software Foundation; either version 3 of the License, or (at
10 : : your option) any later version
11 : :
12 : : or
13 : :
14 : : * the GNU General Public License as published by the Free
15 : : Software Foundation; either version 2 of the License, or (at
16 : : your option) any later version
17 : :
18 : : or both in parallel, as here.
19 : :
20 : : elfutils is distributed in the hope that it will be useful, but
21 : : WITHOUT ANY WARRANTY; without even the implied warranty of
22 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 : : General Public License for more details.
24 : :
25 : : You should have received copies of the GNU General Public License and
26 : : the GNU Lesser General Public License along with this program. If
27 : : not, see <http://www.gnu.org/licenses/>. */
28 : :
29 : : #ifdef HAVE_CONFIG_H
30 : : # include <config.h>
31 : : #endif
32 : :
33 : : #define BACKEND ppc64_
34 : : #include "libebl_CPU.h"
35 : :
36 : : /* Resolve a function descriptor if addr points into the .opd section.
37 : : The .opd section contains function descriptors consisting of 3 addresses.
38 : : function, toc and chain. We are just interested in the first.
39 : : http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-DES
40 : :
41 : : Returns true if the given address could be resolved, false otherwise.
42 : : */
43 : : bool
44 : 40590 : ppc64_resolve_sym_value (Ebl *ebl, GElf_Addr *addr)
45 : : {
46 [ + + + + ]: 40590 : if (ebl->fd_data != NULL && *addr >= ebl->fd_addr
47 [ + - ]: 1430 : && *addr + sizeof (Elf64_Addr) <= ebl->fd_addr + ebl->fd_data->d_size)
48 : : {
49 : 1430 : GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (ebl->elf, &ehdr_mem);
50 [ + - ]: 1430 : if (ehdr != NULL)
51 : : {
52 : 1430 : Elf_Data opd_in, opd_out;
53 : 1430 : opd_in.d_buf = ebl->fd_data->d_buf + (*addr - ebl->fd_addr);
54 : 1430 : opd_out.d_buf = addr;
55 : 1430 : opd_out.d_size = opd_in.d_size = sizeof (Elf64_Addr);
56 : 1430 : opd_out.d_type = opd_in.d_type = ELF_T_ADDR;
57 [ + - ]: 1430 : if (elf64_xlatetom (&opd_out, &opd_in,
58 : 1430 : ehdr->e_ident[EI_DATA]) != NULL)
59 : 1430 : return true;
60 : : }
61 : : }
62 : : return false;
63 : : }
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