# This shell script emits a C file. -*- C -*-
# Copyright 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
#
# This file is part of GLD, the Gnu Linker.
#
# 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# This file is sourced from elf32.em, and defines extra powerpc64-elf
# specific routines.
#
cat >>e${EMULATION_NAME}.c <<EOF
#include "ldctor.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf64-ppc.h"
static lang_input_statement_type *stub_file;
static int stub_added = 0;
static int need_laying_out = 0;
static bfd_signed_vma group_size = 1;
static int dotsyms = 1;
static int no_tls_opt = 0;
static int no_opd_opt = 0;
static int no_toc_opt = 0;
static int no_multi_toc = 0;
static int emit_stub_syms = 0;
static asection *toc_section = 0;
static int non_overlapping_opd = 0;
static void
ppc_create_output_section_statements (void)
{
extern const bfd_target bfd_elf64_powerpc_vec;
extern const bfd_target bfd_elf64_powerpcle_vec;
if (link_info.hash->creator != &bfd_elf64_powerpc_vec
&& link_info.hash->creator != &bfd_elf64_powerpcle_vec)
return;
link_info.wrap_char = '.';
stub_file = lang_add_input_file ("linker stubs",
lang_input_file_is_fake_enum,
NULL);
stub_file->the_bfd = bfd_create ("linker stubs", output_bfd);
if (stub_file->the_bfd == NULL
|| !bfd_set_arch_mach (stub_file->the_bfd,
bfd_get_arch (output_bfd),
bfd_get_mach (output_bfd)))
{
einfo ("%F%P: can not create BFD %E\n");
return;
}
stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
ldlang_add_file (stub_file);
ppc64_elf_init_stub_bfd (stub_file->the_bfd, &link_info);
}
static void
ppc_before_allocation (void)
{
if (stub_file != NULL)
{
if (!no_opd_opt
&& !ppc64_elf_edit_opd (output_bfd, &link_info, non_overlapping_opd))
einfo ("%X%P: can not edit %s %E\n", "opd");
if (ppc64_elf_tls_setup (output_bfd, &link_info) && !no_tls_opt)
{
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, 0, NULL, TRUE);
if (!ppc64_elf_tls_optimize (output_bfd, &link_info))
einfo ("%X%P: TLS problem %E\n");
elf_tdata (output_bfd)->program_header_size = 0;
lang_reset_memory_regions ();
}
if (!no_toc_opt
&& !link_info.relocatable
&& !ppc64_elf_edit_toc (output_bfd, &link_info))
einfo ("%X%P: can not edit %s %E\n", "toc");
}
gld${EMULATION_NAME}_before_allocation ();
}
struct hook_stub_info
{
lang_statement_list_type add;
asection *input_section;
};
static bfd_boolean
hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
{
lang_statement_union_type *l;
bfd_boolean ret;
for (; (l = *lp) != NULL; lp = &l->header.next)
{
switch (l->header.type)
{
case lang_constructors_statement_enum:
ret = hook_in_stub (info, &constructor_list.head);
if (ret)
return ret;
break;
case lang_output_section_statement_enum:
ret = hook_in_stub (info,
&l->output_section_statement.children.head);
if (ret)
return ret;
break;
case lang_wild_statement_enum:
ret = hook_in_stub (info, &l->wild_statement.children.head);
if (ret)
return ret;
break;
case lang_group_statement_enum:
ret = hook_in_stub (info, &l->group_statement.children.head);
if (ret)
return ret;
break;
case lang_input_section_enum:
if (l->input_section.section == info->input_section)
{
*lp = info->add.head;
*(info->add.tail) = l;
return TRUE;
}
break;
case lang_data_statement_enum:
case lang_reloc_statement_enum:
case lang_object_symbols_statement_enum:
case lang_output_statement_enum:
case lang_target_statement_enum:
case lang_input_statement_enum:
case lang_assignment_statement_enum:
case lang_padding_statement_enum:
case lang_address_statement_enum:
case lang_fill_statement_enum:
break;
default:
FAIL ();
break;
}
}
return FALSE;
}
static asection *
ppc_add_stub_section (const char *stub_sec_name, asection *input_section)
{
asection *stub_sec;
flagword flags;
asection *output_section;
const char *secname;
lang_output_section_statement_type *os;
struct hook_stub_info info;
stub_sec = bfd_make_section_anyway (stub_file->the_bfd, stub_sec_name);
if (stub_sec == NULL)
goto err_ret;
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
| SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
if (!bfd_set_section_flags (stub_file->the_bfd, stub_sec, flags))
goto err_ret;
output_section = input_section->output_section;
secname = bfd_get_section_name (output_section->owner, output_section);
os = lang_output_section_find (secname);
info.input_section = input_section;
lang_list_init (&info.add);
lang_add_section (&info.add, stub_sec, os, stub_file);
if (info.add.head == NULL)
goto err_ret;
stub_added = 1;
if (hook_in_stub (&info, &os->children.head))
return stub_sec;
err_ret:
einfo ("%X%P: can not make stub section: %E\n");
return NULL;
}
static void
ppc_layout_sections_again (void)
{
need_laying_out = 0;
lang_reset_memory_regions ();
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, 0, NULL, TRUE);
ldemul_after_allocation ();
lang_do_assignments (stat_ptr->head, abs_output_section, NULL, 0);
}
static void
gld${EMULATION_NAME}_after_allocation (void)
{
if (!link_info.relocatable)
_bfd_set_gp_value (output_bfd, ppc64_elf_toc (output_bfd));
}
static void
build_toc_list (lang_statement_union_type *statement)
{
if (statement->header.type == lang_input_section_enum
&& !statement->input_section.ifile->just_syms_flag
&& (statement->input_section.section->flags & SEC_EXCLUDE) == 0
&& statement->input_section.section->output_section == toc_section)
ppc64_elf_next_toc_section (&link_info, statement->input_section.section);
}
static void
build_section_lists (lang_statement_union_type *statement)
{
if (statement->header.type == lang_input_section_enum
&& !statement->input_section.ifile->just_syms_flag
&& (statement->input_section.section->flags & SEC_EXCLUDE) == 0
&& statement->input_section.section->output_section != NULL
&& statement->input_section.section->output_section->owner == output_bfd)
{
if (!ppc64_elf_next_input_section (&link_info,
statement->input_section.section))
einfo ("%X%P: can not size stub section: %E\n");
}
}
static void
gld${EMULATION_NAME}_finish (void)
{
entry_section = ".opd";
if (bfd_elf_discard_info (output_bfd, &link_info))
need_laying_out = 1;
if (stub_file != NULL && !link_info.relocatable)
{
int ret = ppc64_elf_setup_section_lists (output_bfd, &link_info,
no_multi_toc);
if (ret < 0)
einfo ("%X%P: can not size stub section: %E\n");
else if (ret > 0)
{
toc_section = bfd_get_section_by_name (output_bfd, ".got");
if (toc_section != NULL)
lang_for_each_statement (build_toc_list);
ppc64_elf_reinit_toc (output_bfd, &link_info);
lang_for_each_statement (build_section_lists);
if (!ppc64_elf_size_stubs (output_bfd,
&link_info,
group_size,
&ppc_add_stub_section,
&ppc_layout_sections_again))
einfo ("%X%P: can not size stub section: %E\n");
}
}
if (need_laying_out)
ppc_layout_sections_again ();
if (link_info.relocatable)
{
asection *toc = bfd_get_section_by_name (output_bfd, ".toc");
if (toc != NULL
&& bfd_section_size (output_bfd, toc) > 0x10000)
einfo ("%X%P: TOC section size exceeds 64k\n");
}
if (stub_added)
{
char *msg = NULL;
char *line, *endline;
emit_stub_syms |= link_info.emitrelocations;
if (!ppc64_elf_build_stubs (emit_stub_syms, &link_info,
config.stats ? &msg : NULL))
einfo ("%X%P: can not build stubs: %E\n");
for (line = msg; line != NULL; line = endline)
{
endline = strchr (line, '\n');
if (endline != NULL)
*endline++ = '\0';
fprintf (stderr, "%s: %s\n", program_name, line);
}
if (msg != NULL)
free (msg);
}
ppc64_elf_restore_symbols (&link_info);
}
static struct bfd_elf_version_expr *
gld${EMULATION_NAME}_new_vers_pattern (struct bfd_elf_version_expr *entry)
{
struct bfd_elf_version_expr *dot_entry;
unsigned int len;
char *dot_pat;
if (!dotsyms || entry->pattern[0] == '*' || entry->pattern[0] == '.')
return entry;
dot_entry = xmalloc (sizeof *dot_entry);
*dot_entry = *entry;
dot_entry->next = entry;
len = strlen (entry->pattern) + 2;
dot_pat = xmalloc (len);
dot_pat[0] = '.';
memcpy (dot_pat + 1, entry->pattern, len - 1);
dot_entry->pattern = dot_pat;
if (entry->symbol != NULL)
{
len = strlen (entry->symbol) + 2;
dot_pat = xmalloc (len);
dot_pat[0] = '.';
memcpy (dot_pat + 1, entry->symbol, len - 1);
dot_entry->symbol = dot_pat;
}
return dot_entry;
}
static void (*real_func) (lang_input_statement_type *);
static void ppc_for_each_input_file_wrapper (lang_input_statement_type *l)
{
if (l != stub_file)
(*real_func) (l);
}
static void
ppc_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
{
real_func = func;
lang_for_each_input_file (&ppc_for_each_input_file_wrapper);
}
#define lang_for_each_input_file ppc_lang_for_each_input_file
EOF
# Define some shell vars to insert bits of code into the standard elf
# parse_args and list_options functions.
#
PARSE_AND_LIST_PROLOGUE='
#define OPTION_STUBGROUP_SIZE 301
#define OPTION_STUBSYMS (OPTION_STUBGROUP_SIZE + 1)
#define OPTION_DOTSYMS (OPTION_STUBSYMS + 1)
#define OPTION_NO_DOTSYMS (OPTION_DOTSYMS + 1)
#define OPTION_NO_TLS_OPT (OPTION_NO_DOTSYMS + 1)
#define OPTION_NO_OPD_OPT (OPTION_NO_TLS_OPT + 1)
#define OPTION_NO_TOC_OPT (OPTION_NO_OPD_OPT + 1)
#define OPTION_NO_MULTI_TOC (OPTION_NO_TOC_OPT + 1)
#define OPTION_NON_OVERLAPPING_OPD (OPTION_NO_MULTI_TOC + 1)
'
PARSE_AND_LIST_LONGOPTS='
{ "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
{ "emit-stub-syms", no_argument, NULL, OPTION_STUBSYMS },
{ "dotsyms", no_argument, NULL, OPTION_DOTSYMS },
{ "no-dotsyms", no_argument, NULL, OPTION_NO_DOTSYMS },
{ "no-tls-optimize", no_argument, NULL, OPTION_NO_TLS_OPT },
{ "no-opd-optimize", no_argument, NULL, OPTION_NO_OPD_OPT },
{ "no-toc-optimize", no_argument, NULL, OPTION_NO_TOC_OPT },
{ "no-multi-toc", no_argument, NULL, OPTION_NO_MULTI_TOC },
{ "non-overlapping-opd", no_argument, NULL, OPTION_NON_OVERLAPPING_OPD },
'
PARSE_AND_LIST_OPTIONS='
fprintf (file, _("\
--stub-group-size=N Maximum size of a group of input sections that can be\n\
handled by one stub section. A negative value\n\
locates all stubs before their branches (with a\n\
group size of -N), while a positive value allows\n\
two groups of input sections, one before, and one\n\
after each stub section. Values of +/-1 indicate\n\
the linker should choose suitable defaults.\n"
));
fprintf (file, _("\
--emit-stub-syms Label linker stubs with a symbol.\n"
));
fprintf (file, _("\
--dotsyms For every version pattern \"foo\" in a version script,\n\
add \".foo\" so that function code symbols are\n\
treated the same as function descriptor symbols.\n\
Defaults to on.\n"
));
fprintf (file, _("\
--no-dotsyms Don'\''t do anything special in version scripts.\n"
));
fprintf (file, _("\
--no-tls-optimize Don'\''t try to optimize TLS accesses.\n"
));
fprintf (file, _("\
--no-opd-optimize Don'\''t optimize the OPD section.\n"
));
fprintf (file, _("\
--no-toc-optimize Don'\''t optimize the TOC section.\n"
));
fprintf (file, _("\
--no-multi-toc Disallow automatic multiple toc sections.\n"
));
fprintf (file, _("\
--non-overlapping-opd Canonicalize .opd, so that there are no overlapping\n\
.opd entries.\n"
));
'
PARSE_AND_LIST_ARGS_CASES='
case OPTION_STUBGROUP_SIZE:
{
const char *end;
group_size = bfd_scan_vma (optarg, &end, 0);
if (*end)
einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
}
break;
case OPTION_STUBSYMS:
emit_stub_syms = 1;
break;
case OPTION_DOTSYMS:
dotsyms = 1;
break;
case OPTION_NO_DOTSYMS:
dotsyms = 0;
break;
case OPTION_NO_TLS_OPT:
no_tls_opt = 1;
break;
case OPTION_NO_OPD_OPT:
no_opd_opt = 1;
break;
case OPTION_NO_TOC_OPT:
no_toc_opt = 1;
break;
case OPTION_NO_MULTI_TOC:
no_multi_toc = 1;
break;
case OPTION_NON_OVERLAPPING_OPD:
non_overlapping_opd = 1;
break;
'
# Put these extra ppc64elf routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_BEFORE_ALLOCATION=ppc_before_allocation
LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
LDEMUL_FINISH=gld${EMULATION_NAME}_finish
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=ppc_create_output_section_statements
LDEMUL_NEW_VERS_PATTERN=gld${EMULATION_NAME}_new_vers_pattern