1 /* Initialization of PPC64 specific backend library. 2 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2013, 2014 Red Hat, Inc. 3 This file is part of elfutils. 4 Written by Ulrich Drepper <drepper (at) redhat.com>, 2004. 5 6 This file is free software; you can redistribute it and/or modify 7 it under the terms of either 8 9 * the GNU Lesser General Public License as published by the Free 10 Software Foundation; either version 3 of the License, or (at 11 your option) any later version 12 13 or 14 15 * the GNU General Public License as published by the Free 16 Software Foundation; either version 2 of the License, or (at 17 your option) any later version 18 19 or both in parallel, as here. 20 21 elfutils is distributed in the hope that it will be useful, but 22 WITHOUT ANY WARRANTY; without even the implied warranty of 23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 24 General Public License for more details. 25 26 You should have received copies of the GNU General Public License and 27 the GNU Lesser General Public License along with this program. If 28 not, see <http://www.gnu.org/licenses/>. */ 29 30 #ifdef HAVE_CONFIG_H 31 # include <config.h> 32 #endif 33 34 #include <string.h> 35 36 #define BACKEND ppc64_ 37 #define RELOC_PREFIX R_PPC64_ 38 #include "libebl_CPU.h" 39 40 /* This defines the common reloc hooks based on ppc64_reloc.def. */ 41 #include "common-reloc.c" 42 43 44 const char * 45 ppc64_init (Elf *elf __attribute__ ((unused)), 46 GElf_Half machine __attribute__ ((unused)), 47 Ebl *eh, 48 size_t ehlen) 49 { 50 /* Check whether the Elf_BH object has a sufficent size. */ 51 if (ehlen < sizeof (Ebl)) 52 return NULL; 53 54 /* We handle it. */ 55 eh->name = "PowerPC 64-bit"; 56 ppc64_init_reloc (eh); 57 HOOK (eh, reloc_simple_type); 58 HOOK (eh, dynamic_tag_name); 59 HOOK (eh, dynamic_tag_check); 60 HOOK (eh, machine_flag_check); 61 HOOK (eh, copy_reloc_p); 62 HOOK (eh, check_special_symbol); 63 HOOK (eh, check_st_other_bits); 64 HOOK (eh, bss_plt_p); 65 HOOK (eh, return_value_location); 66 HOOK (eh, register_info); 67 HOOK (eh, syscall_abi); 68 HOOK (eh, core_note); 69 HOOK (eh, auxv_info); 70 HOOK (eh, abi_cfi); 71 /* gcc/config/ #define DWARF_FRAME_REGISTERS. */ 72 eh->frame_nregs = (114 - 1) + 32; 73 HOOK (eh, set_initial_registers_tid); 74 HOOK (eh, dwarf_to_regno); 75 HOOK (eh, resolve_sym_value); 76 77 /* Find the function descriptor .opd table for resolve_sym_value. */ 78 if (elf != NULL) 79 { 80 GElf_Ehdr ehdr_mem, *ehdr = gelf_getehdr (elf, &ehdr_mem); 81 if (ehdr != NULL && ehdr->e_type != ET_REL) 82 { 83 /* We could also try through DT_PPC64_OPD and DT_PPC64_OPDSZ. */ 84 GElf_Shdr opd_shdr_mem, *opd_shdr; 85 Elf_Scn *scn = NULL; 86 while ((scn = elf_nextscn (elf, scn)) != NULL) 87 { 88 opd_shdr = gelf_getshdr (scn, &opd_shdr_mem); 89 if (opd_shdr != NULL 90 && (opd_shdr->sh_flags & SHF_ALLOC) != 0 91 && opd_shdr->sh_type == SHT_PROGBITS 92 && opd_shdr->sh_size > 0) 93 { 94 const char *name = elf_strptr (elf, ehdr->e_shstrndx, 95 opd_shdr->sh_name); 96 if (name != NULL && strcmp (name, ".opd") == 0) 97 { 98 eh->fd_addr = opd_shdr->sh_addr; 99 eh->fd_data = elf_getdata (scn, NULL); 100 break; 101 } 102 } 103 } 104 } 105 } 106 107 return MODVERSION; 108 } 109
