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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 : : }