157 lines
4.7 KiB
Plaintext
157 lines
4.7 KiB
Plaintext
# This shell script emits a C file. -*- C -*-
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# It does some substitutions.
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if [ -z "$MACHINE" ]; then
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OUTPUT_ARCH=${ARCH}
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else
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OUTPUT_ARCH=${ARCH}:${MACHINE}
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fi
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fragment <<EOF
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/* This file is generated by a shell script. DO NOT EDIT! */
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/* Solaris 2 emulation code for ${EMULATION_NAME}
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Copyright (C) 2010-2018 Free Software Foundation, Inc.
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Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
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This file is part of the GNU Binutils.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#define TARGET_IS_${EMULATION_NAME}
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/* The Solaris 2 ABI requires some global symbols to be present in the
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.dynsym table of executables and shared objects. If generating a
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versioned shared object, they must always be bound to the base version.
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Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
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File, p.63. */
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static void
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elf_solaris2_before_allocation (void)
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{
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/* Global symbols required by the Solaris 2 ABI. */
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static const char *global_syms[] = {
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"_DYNAMIC",
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"_GLOBAL_OFFSET_TABLE_",
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"_PROCEDURE_LINKAGE_TABLE_",
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"_edata",
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"_end",
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"_etext",
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NULL
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};
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const char **sym;
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/* Do this for both executables and shared objects. */
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if (!bfd_link_relocatable (&link_info))
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{
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for (sym = global_syms; *sym != NULL; sym++)
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{
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struct elf_link_hash_entry *h;
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/* Lookup symbol. */
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h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
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FALSE, FALSE, FALSE);
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if (h == NULL)
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continue;
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/* Undo the hiding done by _bfd_elf_define_linkage_sym. */
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h->forced_local = 0;
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h->other &= ~STV_HIDDEN;
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/* Emit it into the .dynamic section, too. */
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bfd_elf_link_record_dynamic_symbol (&link_info, h);
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}
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}
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/* Only do this if emitting a shared object and versioning is in place. */
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if (bfd_link_dll (&link_info)
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&& ((link_info.version_info != NULL
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&& link_info.version_info->name[0] != '\0')
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|| link_info.create_default_symver))
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{
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struct bfd_elf_version_expr *globals = NULL, *locals = NULL;
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struct bfd_elf_version_tree *basever;
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const char *soname;
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for (sym = global_syms; *sym != NULL; sym++)
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{
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/* Create a version pattern for this symbol. Some of them start
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off as local, others as global, so try both. */
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globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE);
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locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE);
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}
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/* New version node for those symbols. */
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basever = lang_new_vers_node (globals, locals);
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/* The version name matches what bfd_elf_size_dynamic_sections uses
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for the base version. */
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soname = bfd_elf_get_dt_soname (link_info.output_bfd);
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if (soname == NULL)
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soname = lbasename (bfd_get_filename (link_info.output_bfd));
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/* Register the node. */
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lang_register_vers_node (soname, basever, NULL);
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/* Enforce base version. The encoded vd_ndx is vernum + 1. */
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basever->vernum = 0;
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}
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gld${EMULATION_NAME}_before_allocation ();
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}
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/* The Solaris 2 ABI requires two local symbols to be emitted for every
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executable and shared object.
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Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
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File, p.63. */
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static void
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elf_solaris2_after_allocation (void)
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{
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/* Local symbols required by the Solaris 2 ABI. Already emitted by
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emulparams/solaris2.sh. */
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static const char *local_syms[] = {
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"_START_",
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"_END_",
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NULL
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};
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const char **sym;
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/* Do this for both executables and shared objects. */
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if (!bfd_link_relocatable (&link_info))
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{
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for (sym = local_syms; *sym != NULL; sym++)
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{
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struct elf_link_hash_entry *h;
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/* Lookup symbol. */
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h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
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FALSE, FALSE, FALSE);
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if (h == NULL)
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continue;
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/* Turn it local. */
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h->forced_local = 1;
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/* Type should be STT_OBJECT, not STT_NOTYPE. */
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h->type = STT_OBJECT;
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}
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}
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gld${EMULATION_NAME}_after_allocation ();
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}
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EOF
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LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation
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LDEMUL_AFTER_ALLOCATION=elf_solaris2_after_allocation
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