| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | if [ -z "$MACHINE" ]; then |
| 4 | OUTPUT_ARCH=${ARCH} |
| 5 | else |
| 6 | OUTPUT_ARCH=${ARCH}:${MACHINE} |
| 7 | fi |
| 8 | fragment <<EOF |
| 9 | /* This file is generated by a shell script. DO NOT EDIT! */ |
| 10 | |
| 11 | /* Solaris 2 emulation code for ${EMULATION_NAME} |
| 12 | Copyright (C) 2010-2020 Free Software Foundation, Inc. |
| 13 | Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> |
| 14 | |
| 15 | This file is part of the GNU Binutils. |
| 16 | |
| 17 | This program is free software; you can redistribute it and/or modify |
| 18 | it under the terms of the GNU General Public License as published by |
| 19 | the Free Software Foundation; either version 3 of the License, or |
| 20 | (at your option) any later version. |
| 21 | |
| 22 | This program is distributed in the hope that it will be useful, |
| 23 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 25 | GNU General Public License for more details. |
| 26 | |
| 27 | You should have received a copy of the GNU General Public License |
| 28 | along with this program; if not, write to the Free Software |
| 29 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 30 | MA 02110-1301, USA. */ |
| 31 | |
| 32 | #define TARGET_IS_${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 | |
| 44 | static void |
| 45 | elf_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 | { |
| 69 | for (sym = global_syms; *sym != NULL; sym++) |
| 70 | { |
| 71 | struct elf_link_hash_entry *h; |
| 72 | |
| 73 | /* Lookup symbol. */ |
| 74 | h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, |
| 75 | FALSE, FALSE, FALSE); |
| 76 | if (h == NULL) |
| 77 | continue; |
| 78 | |
| 79 | /* Undo the hiding done by _bfd_elf_define_linkage_sym. */ |
| 80 | h->forced_local = 0; |
| 81 | h->other &= ~STV_HIDDEN; |
| 82 | |
| 83 | /* Emit it into the .dynamic section, too. */ |
| 84 | bfd_elf_link_record_dynamic_symbol (&link_info, h); |
| 85 | } |
| 86 | |
| 87 | for (sym = local_syms; *sym != NULL; sym++) |
| 88 | { |
| 89 | struct elf_link_hash_entry *h; |
| 90 | |
| 91 | /* Lookup symbol. */ |
| 92 | h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym, |
| 93 | FALSE, FALSE, FALSE); |
| 94 | if (h == NULL) |
| 95 | continue; |
| 96 | |
| 97 | /* Turn it local. */ |
| 98 | h->forced_local = 1; |
| 99 | /* Type should be STT_OBJECT, not STT_NOTYPE. */ |
| 100 | h->type = STT_OBJECT; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /* Only do this if emitting a shared object and versioning is in place. */ |
| 105 | if (bfd_link_dll (&link_info) |
| 106 | && ((link_info.version_info != NULL |
| 107 | && link_info.version_info->name[0] != '\0') |
| 108 | || link_info.create_default_symver)) |
| 109 | { |
| 110 | struct bfd_elf_version_expr *globals = NULL, *locals = NULL; |
| 111 | struct bfd_elf_version_tree *basever; |
| 112 | const char *soname; |
| 113 | |
| 114 | for (sym = global_syms; *sym != NULL; sym++) |
| 115 | { |
| 116 | /* Create a version pattern for this symbol. Some of them start |
| 117 | off as local, others as global, so try both. */ |
| 118 | globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE); |
| 119 | locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE); |
| 120 | } |
| 121 | |
| 122 | /* New version node for those symbols. */ |
| 123 | basever = lang_new_vers_node (globals, locals); |
| 124 | |
| 125 | /* The version name matches what bfd_elf_size_dynamic_sections uses |
| 126 | for the base version. */ |
| 127 | soname = bfd_elf_get_dt_soname (link_info.output_bfd); |
| 128 | if (soname == NULL) |
| 129 | soname = lbasename (bfd_get_filename (link_info.output_bfd)); |
| 130 | |
| 131 | /* Register the node. */ |
| 132 | lang_register_vers_node (soname, basever, NULL); |
| 133 | /* Enforce base version. The encoded vd_ndx is vernum + 1. */ |
| 134 | basever->vernum = 0; |
| 135 | } |
| 136 | |
| 137 | gld${EMULATION_NAME}_before_allocation (); |
| 138 | } |
| 139 | |
| 140 | EOF |
| 141 | |
| 142 | LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation |