1 /* PPC64 specific symbolic name handling. 2 Copyright (C) 2004, 2005, 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 <assert.h> 35 #include <elf.h> 36 #include <stddef.h> 37 #include <string.h> 38 39 #define BACKEND ppc64_ 40 #include "libebl_CPU.h" 41 42 43 /* Check for the simple reloc types. */ 44 Elf_Type 45 ppc64_reloc_simple_type (Ebl *ebl __attribute__ ((unused)), int type) 46 { 47 switch (type) 48 { 49 case R_PPC64_ADDR64: 50 case R_PPC64_UADDR64: 51 return ELF_T_XWORD; 52 case R_PPC64_ADDR32: 53 case R_PPC64_UADDR32: 54 return ELF_T_WORD; 55 case R_PPC64_UADDR16: 56 return ELF_T_HALF; 57 default: 58 return ELF_T_NUM; 59 } 60 } 61 62 63 const char * 64 ppc64_dynamic_tag_name (int64_t tag, char *buf __attribute__ ((unused)), 65 size_t len __attribute__ ((unused))) 66 { 67 switch (tag) 68 { 69 case DT_PPC64_GLINK: 70 return "PPC64_GLINK"; 71 case DT_PPC64_OPD: 72 return "PPC64_OPD"; 73 case DT_PPC64_OPDSZ: 74 return "PPC64_OPDSZ"; 75 case DT_PPC64_OPT: 76 return "PPC64_OPT"; 77 default: 78 break; 79 } 80 return NULL; 81 } 82 83 84 bool 85 ppc64_dynamic_tag_check (int64_t tag) 86 { 87 return (tag == DT_PPC64_GLINK 88 || tag == DT_PPC64_OPD 89 || tag == DT_PPC64_OPDSZ 90 || tag == DT_PPC64_OPT); 91 } 92 93 94 /* Check whether given symbol's st_value and st_size are OK despite failing 95 normal checks. */ 96 bool 97 ppc64_check_special_symbol (Elf *elf, GElf_Ehdr *ehdr, 98 const GElf_Sym *sym __attribute__ ((unused)), 99 const char *name __attribute__ ((unused)), 100 const GElf_Shdr *destshdr) 101 { 102 const char *sname = elf_strptr (elf, ehdr->e_shstrndx, destshdr->sh_name); 103 if (sname == NULL) 104 return false; 105 return strcmp (sname, ".opd") == 0; 106 } 107 108 109 /* Check if backend uses a bss PLT in this file. */ 110 bool 111 ppc64_bss_plt_p (Elf *elf __attribute__ ((unused))) 112 { 113 return true; 114 } 115 116 /* Check whether machine flags are valid. PPC64 has three possible values: 117 0 - for unspecified ABI, or not using any specific ABI features. 118 1 - for the original ELF PPC64 ABI using function descriptors. 119 2 - for the revised ELFv2 PPC64 ABI without function descriptors. */ 120 bool 121 ppc64_machine_flag_check (GElf_Word flags) 122 { 123 return flags == 0 || flags == 1 || flags == 2; 124 } 125 126 bool 127 ppc64_check_st_other_bits (unsigned char st_other) 128 { 129 return (PPC64_LOCAL_ENTRY_OFFSET (st_other) != 0); 130 } 131
