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 ppc64_resolve_sym_value (Ebl *ebl, GElf_Addr *addr) 45 { 46 if (ebl->fd_data != NULL && *addr >= ebl->fd_addr 47 && *addr + sizeof (Elf64_Addr) <= ebl->fd_addr + ebl->fd_data->d_size) 48 { 49 GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (ebl->elf, &ehdr_mem); 50 if (ehdr != NULL) 51 { 52 Elf_Data opd_in, opd_out; 53 opd_in.d_buf = ebl->fd_data->d_buf + (*addr - ebl->fd_addr); 54 opd_out.d_buf = addr; 55 opd_out.d_size = opd_in.d_size = sizeof (Elf64_Addr); 56 opd_out.d_type = opd_in.d_type = ELF_T_ADDR; 57 if (elf64_xlatetom (&opd_out, &opd_in, 58 ehdr->e_ident[EI_DATA]) != NULL) 59 return true; 60 } 61 } 62 return false; 63 } 64
