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 ${EMULATION_NAME} 12 Copyright 2010 Free Software Foundation, Inc. 13 Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> 14 15 This file is part of the GNU Binutils. 16 17 This program is free software; you can redistribute it and/or modify 18 it under the terms of the GNU General Public License as published by 19 the Free Software Foundation; either version 3 of the License, or 20 (at your option) any later version. 21 22 This program is distributed in the hope that it will be useful, 23 but WITHOUT ANY WARRANTY; without even the implied warranty of 24 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 25 GNU General Public License for more details. 26 27 You should have received a copy of the GNU General Public License 28 along with this program; if not, write to the Free Software 29 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, 30 MA 02110-1301, USA. */ 31 32#define TARGET_IS_${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 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output 39 File, p.63. */ 40static void 41elf_solaris2_before_allocation (void) 42{ 43 /* Global symbols required by the Solaris 2 ABI. */ 44 static const char *global_syms[] = { 45 "_DYNAMIC", 46 "_GLOBAL_OFFSET_TABLE_", 47 "_PROCEDURE_LINKAGE_TABLE_", 48 "_edata", 49 "_end", 50 "_etext", 51 NULL 52 }; 53 const char **sym; 54 55 /* Do this for both executables and shared objects. */ 56 if (!link_info.relocatable) 57 { 58 for (sym = global_syms; *sym != NULL; sym++) 59 { 60 struct elf_link_hash_entry *h; 61 62 /* Lookup symbol. */ 63 h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, 64 FALSE, FALSE, FALSE); 65 if (h == NULL) 66 continue; 67 68 /* Undo the hiding done by _bfd_elf_define_linkage_sym. */ 69 h->forced_local = 0; 70 h->other &= ~STV_HIDDEN; 71 72 /* Emit it into the .dynamic section, too. */ 73 bfd_elf_link_record_dynamic_symbol (&link_info, h); 74 } 75 } 76 77 /* Only do this if emitting a shared object and versioning is in place. */ 78 if (link_info.shared 79 && (lang_elf_version_info != NULL || link_info.create_default_symver)) 80 { 81 struct bfd_elf_version_expr *globals = NULL, *locals = NULL; 82 struct bfd_elf_version_tree *basever; 83 const char *soname; 84 85 for (sym = global_syms; *sym != NULL; sym++) 86 { 87 /* Create a version pattern for this symbol. Some of them start 88 off as local, others as global, so try both. */ 89 globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE); 90 locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE); 91 } 92 93 /* New version node for those symbols. */ 94 basever = lang_new_vers_node (globals, locals); 95 96 /* The version name matches what bfd_elf_size_dynamic_sections uses 97 for the base version. */ 98 soname = bfd_elf_get_dt_soname (link_info.output_bfd); 99 if (soname == NULL) 100 soname = lbasename (bfd_get_filename (link_info.output_bfd)); 101 102 /* Register the node. */ 103 lang_register_vers_node (soname, basever, NULL); 104 /* Enforce base version. The encoded vd_ndx is vernum + 1. */ 105 basever->vernum = 0; 106 } 107 108 gld${EMULATION_NAME}_before_allocation (); 109} 110 111/* The Solaris 2 ABI requires two local symbols to be emitted for every 112 executable and shared object. 113 114 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output 115 File, p.63. */ 116static void 117elf_solaris2_after_allocation (void) 118{ 119 /* Local symbols required by the Solaris 2 ABI. Already emitted by 120 emulparams/solaris2.sh. */ 121 static const char *local_syms[] = { 122 "_START_", 123 "_END_", 124 NULL 125 }; 126 const char **sym; 127 128 /* Do this for both executables and shared objects. */ 129 if (!link_info.relocatable) 130 { 131 for (sym = local_syms; *sym != NULL; sym++) 132 { 133 struct elf_link_hash_entry *h; 134 135 /* Lookup symbol. */ 136 h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, 137 FALSE, FALSE, FALSE); 138 if (h == NULL) 139 continue; 140 141 /* Turn it local. */ 142 h->forced_local = 1; 143 /* Type should be STT_OBJECT, not STT_NOTYPE. */ 144 h->type = STT_OBJECT; 145 } 146 } 147 148 gld${EMULATION_NAME}_after_allocation (); 149} 150 151EOF 152 153LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation 154LDEMUL_AFTER_ALLOCATION=elf_solaris2_after_allocation 155