1# This shell script emits a C file. -*- C -*- 2# It does some substitutions. 3if [ -z "$MACHINE" ]; then 4 OUTPUT_ARCH=${ARCH} 5else 6 OUTPUT_ARCH=${ARCH}:${MACHINE} 7fi 8fragment <<EOF 9/* This file is generated by a shell script. DO NOT EDIT! */ 10 11/* Solaris 2 emulation code for ${EMULATION_NAME} 12 Copyright (C) 2010-2022 Free Software Foundation, Inc. 13 Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> 14 15 This file is part of the GNU Binutils. 16 17 This program is free software; you can redistribute it and/or modify 18 it under the terms of the GNU General Public License as published by 19 the Free Software Foundation; either version 3 of the License, or 20 (at your option) any later version. 21 22 This program is distributed in the hope that it will be useful, 23 but WITHOUT ANY WARRANTY; without even the implied warranty of 24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 GNU General Public License for more details. 26 27 You should have received a copy of the GNU General Public License 28 along with this program; if not, write to the Free Software 29 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 30 MA 02110-1301, USA. */ 31 32#define TARGET_IS_${EMULATION_NAME} 33 34/* The Solaris 2 ABI requires some global symbols to be present in the 35 .dynsym table of executables and shared objects. If generating a 36 versioned shared object, they must always be bound to the base version. 37 38 The Solaris 2 ABI also requires two local symbols to be emitted for 39 every executable and shared object. 40 41 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output 42 File, p.63. */ 43 44static void 45elf_solaris2_before_allocation (void) 46{ 47 /* Global symbols required by the Solaris 2 ABI. */ 48 static const char *global_syms[] = { 49 "_DYNAMIC", 50 "_GLOBAL_OFFSET_TABLE_", 51 "_PROCEDURE_LINKAGE_TABLE_", 52 "_edata", 53 "_end", 54 "_etext", 55 NULL 56 }; 57 /* Local symbols required by the Solaris 2 ABI. Already emitted by 58 emulparams/solaris2.sh. */ 59 static const char *local_syms[] = { 60 "_START_", 61 "_END_", 62 NULL 63 }; 64 const char **sym; 65 66 /* Do this for both executables and shared objects. */ 67 if (!bfd_link_relocatable (&link_info) 68 && is_elf_hash_table (link_info.hash)) 69 { 70 for (sym = global_syms; *sym != NULL; sym++) 71 { 72 struct elf_link_hash_entry *h; 73 74 /* Lookup symbol. */ 75 h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, 76 false, false, false); 77 if (h == NULL) 78 continue; 79 80 /* Undo the hiding done by _bfd_elf_define_linkage_sym. */ 81 h->forced_local = 0; 82 h->other &= ~STV_HIDDEN; 83 84 /* Emit it into the .dynamic section, too. */ 85 bfd_elf_link_record_dynamic_symbol (&link_info, h); 86 } 87 88 for (sym = local_syms; *sym != NULL; sym++) 89 { 90 struct elf_link_hash_entry *h; 91 92 /* Lookup symbol. */ 93 h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, 94 false, false, false); 95 if (h == NULL) 96 continue; 97 98 /* Turn it local. */ 99 h->forced_local = 1; 100 /* Type should be STT_OBJECT, not STT_NOTYPE. */ 101 h->type = STT_OBJECT; 102 } 103 } 104 105 /* Only do this if emitting a shared object and versioning is in place. */ 106 if (bfd_link_dll (&link_info) 107 && ((link_info.version_info != NULL 108 && link_info.version_info->name[0] != '\0') 109 || link_info.create_default_symver)) 110 { 111 struct bfd_elf_version_expr *globals = NULL, *locals = NULL; 112 struct bfd_elf_version_tree *basever; 113 const char *soname; 114 115 for (sym = global_syms; *sym != NULL; sym++) 116 { 117 /* Create a version pattern for this symbol. Some of them start 118 off as local, others as global, so try both. */ 119 globals = lang_new_vers_pattern (globals, *sym, NULL, true); 120 locals = lang_new_vers_pattern (locals, *sym, NULL, true); 121 } 122 123 /* New version node for those symbols. */ 124 basever = lang_new_vers_node (globals, locals); 125 126 /* The version name matches what bfd_elf_size_dynamic_sections uses 127 for the base version. */ 128 soname = bfd_elf_get_dt_soname (link_info.output_bfd); 129 if (soname == NULL) 130 soname = lbasename (bfd_get_filename (link_info.output_bfd)); 131 132 /* Register the node. */ 133 lang_register_vers_node (soname, basever, NULL); 134 /* Enforce base version. The encoded vd_ndx is vernum + 1. */ 135 basever->vernum = 0; 136 } 137 138 gld${EMULATION_NAME}_before_allocation (); 139} 140 141EOF 142 143LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation 144