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|
# This shell script emits a C file. -*- C -*-
# It does some substitutions.
if [ -z "$MACHINE" ]; then
OUTPUT_ARCH=${ARCH}
else
OUTPUT_ARCH=${ARCH}:${MACHINE}
fi
fragment <<EOF
/* This file is generated by a shell script. DO NOT EDIT! */
/* Solaris 2 emulation code for ${EMULATION_NAME}
Copyright (C) 2010-2020 Free Software Foundation, Inc.
Written by Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
This file is part of the GNU Binutils.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#define TARGET_IS_${EMULATION_NAME}
/* The Solaris 2 ABI requires some global symbols to be present in the
.dynsym table of executables and shared objects. If generating a
versioned shared object, they must always be bound to the base version.
The Solaris 2 ABI also requires two local symbols to be emitted for
every executable and shared object.
Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
File, p.63. */
static void
elf_solaris2_before_allocation (void)
{
/* Global symbols required by the Solaris 2 ABI. */
static const char *global_syms[] = {
"_DYNAMIC",
"_GLOBAL_OFFSET_TABLE_",
"_PROCEDURE_LINKAGE_TABLE_",
"_edata",
"_end",
"_etext",
NULL
};
/* Local symbols required by the Solaris 2 ABI. Already emitted by
emulparams/solaris2.sh. */
static const char *local_syms[] = {
"_START_",
"_END_",
NULL
};
const char **sym;
/* Do this for both executables and shared objects. */
if (!bfd_link_relocatable (&link_info))
{
for (sym = global_syms; *sym != NULL; sym++)
{
struct elf_link_hash_entry *h;
/* Lookup symbol. */
h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
FALSE, FALSE, FALSE);
if (h == NULL)
continue;
/* Undo the hiding done by _bfd_elf_define_linkage_sym. */
h->forced_local = 0;
h->other &= ~STV_HIDDEN;
/* Emit it into the .dynamic section, too. */
bfd_elf_link_record_dynamic_symbol (&link_info, h);
}
for (sym = local_syms; *sym != NULL; sym++)
{
struct elf_link_hash_entry *h;
/* Lookup symbol. */
h = elf_link_hash_lookup (elf_hash_table (&link_info), *sym,
FALSE, FALSE, FALSE);
if (h == NULL)
continue;
/* Turn it local. */
h->forced_local = 1;
/* Type should be STT_OBJECT, not STT_NOTYPE. */
h->type = STT_OBJECT;
}
}
/* Only do this if emitting a shared object and versioning is in place. */
if (bfd_link_dll (&link_info)
&& ((link_info.version_info != NULL
&& link_info.version_info->name[0] != '\0')
|| link_info.create_default_symver))
{
struct bfd_elf_version_expr *globals = NULL, *locals = NULL;
struct bfd_elf_version_tree *basever;
const char *soname;
for (sym = global_syms; *sym != NULL; sym++)
{
/* Create a version pattern for this symbol. Some of them start
off as local, others as global, so try both. */
globals = lang_new_vers_pattern (globals, *sym, NULL, TRUE);
locals = lang_new_vers_pattern (locals, *sym, NULL, TRUE);
}
/* New version node for those symbols. */
basever = lang_new_vers_node (globals, locals);
/* The version name matches what bfd_elf_size_dynamic_sections uses
for the base version. */
soname = bfd_elf_get_dt_soname (link_info.output_bfd);
if (soname == NULL)
soname = lbasename (bfd_get_filename (link_info.output_bfd));
/* Register the node. */
lang_register_vers_node (soname, basever, NULL);
/* Enforce base version. The encoded vd_ndx is vernum + 1. */
basever->vernum = 0;
}
gld${EMULATION_NAME}_before_allocation ();
}
EOF
LDEMUL_BEFORE_ALLOCATION=elf_solaris2_before_allocation
|
