1*7304104dSAndroid Build Coastguard Worker /* Resolve symbol values through .opd function descriptors.
2*7304104dSAndroid Build Coastguard Worker Copyright (C) 2013 Red Hat, Inc.
3*7304104dSAndroid Build Coastguard Worker This file is part of elfutils.
4*7304104dSAndroid Build Coastguard Worker
5*7304104dSAndroid Build Coastguard Worker This file is free software; you can redistribute it and/or modify
6*7304104dSAndroid Build Coastguard Worker it under the terms of either
7*7304104dSAndroid Build Coastguard Worker
8*7304104dSAndroid Build Coastguard Worker * the GNU Lesser General Public License as published by the Free
9*7304104dSAndroid Build Coastguard Worker Software Foundation; either version 3 of the License, or (at
10*7304104dSAndroid Build Coastguard Worker your option) any later version
11*7304104dSAndroid Build Coastguard Worker
12*7304104dSAndroid Build Coastguard Worker or
13*7304104dSAndroid Build Coastguard Worker
14*7304104dSAndroid Build Coastguard Worker * the GNU General Public License as published by the Free
15*7304104dSAndroid Build Coastguard Worker Software Foundation; either version 2 of the License, or (at
16*7304104dSAndroid Build Coastguard Worker your option) any later version
17*7304104dSAndroid Build Coastguard Worker
18*7304104dSAndroid Build Coastguard Worker or both in parallel, as here.
19*7304104dSAndroid Build Coastguard Worker
20*7304104dSAndroid Build Coastguard Worker elfutils is distributed in the hope that it will be useful, but
21*7304104dSAndroid Build Coastguard Worker WITHOUT ANY WARRANTY; without even the implied warranty of
22*7304104dSAndroid Build Coastguard Worker MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23*7304104dSAndroid Build Coastguard Worker General Public License for more details.
24*7304104dSAndroid Build Coastguard Worker
25*7304104dSAndroid Build Coastguard Worker You should have received copies of the GNU General Public License and
26*7304104dSAndroid Build Coastguard Worker the GNU Lesser General Public License along with this program. If
27*7304104dSAndroid Build Coastguard Worker not, see <http://www.gnu.org/licenses/>. */
28*7304104dSAndroid Build Coastguard Worker
29*7304104dSAndroid Build Coastguard Worker #ifdef HAVE_CONFIG_H
30*7304104dSAndroid Build Coastguard Worker # include <config.h>
31*7304104dSAndroid Build Coastguard Worker #endif
32*7304104dSAndroid Build Coastguard Worker
33*7304104dSAndroid Build Coastguard Worker #define BACKEND ppc64_
34*7304104dSAndroid Build Coastguard Worker #include "libebl_CPU.h"
35*7304104dSAndroid Build Coastguard Worker
36*7304104dSAndroid Build Coastguard Worker /* Resolve a function descriptor if addr points into the .opd section.
37*7304104dSAndroid Build Coastguard Worker The .opd section contains function descriptors consisting of 3 addresses.
38*7304104dSAndroid Build Coastguard Worker function, toc and chain. We are just interested in the first.
39*7304104dSAndroid Build Coastguard Worker http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#FUNC-DES
40*7304104dSAndroid Build Coastguard Worker
41*7304104dSAndroid Build Coastguard Worker Returns true if the given address could be resolved, false otherwise.
42*7304104dSAndroid Build Coastguard Worker */
43*7304104dSAndroid Build Coastguard Worker bool
ppc64_resolve_sym_value(Ebl * ebl,GElf_Addr * addr)44*7304104dSAndroid Build Coastguard Worker ppc64_resolve_sym_value (Ebl *ebl, GElf_Addr *addr)
45*7304104dSAndroid Build Coastguard Worker {
46*7304104dSAndroid Build Coastguard Worker if (ebl->fd_data != NULL && *addr >= ebl->fd_addr
47*7304104dSAndroid Build Coastguard Worker && *addr + sizeof (Elf64_Addr) <= ebl->fd_addr + ebl->fd_data->d_size)
48*7304104dSAndroid Build Coastguard Worker {
49*7304104dSAndroid Build Coastguard Worker GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (ebl->elf, &ehdr_mem);
50*7304104dSAndroid Build Coastguard Worker if (ehdr != NULL)
51*7304104dSAndroid Build Coastguard Worker {
52*7304104dSAndroid Build Coastguard Worker Elf_Data opd_in, opd_out;
53*7304104dSAndroid Build Coastguard Worker opd_in.d_buf = ebl->fd_data->d_buf + (*addr - ebl->fd_addr);
54*7304104dSAndroid Build Coastguard Worker opd_out.d_buf = addr;
55*7304104dSAndroid Build Coastguard Worker opd_out.d_size = opd_in.d_size = sizeof (Elf64_Addr);
56*7304104dSAndroid Build Coastguard Worker opd_out.d_type = opd_in.d_type = ELF_T_ADDR;
57*7304104dSAndroid Build Coastguard Worker if (elf64_xlatetom (&opd_out, &opd_in,
58*7304104dSAndroid Build Coastguard Worker ehdr->e_ident[EI_DATA]) != NULL)
59*7304104dSAndroid Build Coastguard Worker return true;
60*7304104dSAndroid Build Coastguard Worker }
61*7304104dSAndroid Build Coastguard Worker }
62*7304104dSAndroid Build Coastguard Worker return false;
63*7304104dSAndroid Build Coastguard Worker }
64