binutils-gdb/ld/emultempl/hppaelf.em
Alan Modra 41392f033d Add some shell variables and shell code to elf32.em
to allow elf32.em to be used by ports that require
some minor variations or a few extra functions.
Implement for hppaelf and armelf.
Fix header file include order in m68kcoff.em
2000-07-28 01:33:14 +00:00

321 lines
8.3 KiB
Plaintext

# This shell script emits a C file. -*- C -*-
# Copyright (C) 1991, 93, 94, 95, 97, 99, 2000
# 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 hppa-elf
# specific routines.
#
cat >>e${EMULATION_NAME}.c <<EOF
#include "ldctor.h"
#include "elf32-hppa.h"
static void hppaelf_set_output_arch PARAMS ((void));
static void hppaelf_create_output_section_statements PARAMS ((void));
static void hppaelf_delete_padding_statements
PARAMS ((lang_statement_list_type *));
static asection *hppaelf_add_stub_section
PARAMS ((const char *, asection *));
static void hppaelf_layaout_sections_again PARAMS ((void));
static void hppaelf_finish PARAMS ((void));
/* Fake input file for stubs. */
static lang_input_statement_type *stub_file;
/* Set the output architecture and machine. */
static void
hppaelf_set_output_arch ()
{
unsigned long machine = 0;
bfd_set_arch_mach (output_bfd, ldfile_output_architecture, machine);
}
/* This is called before the input files are opened. We create a new
fake input file to hold the stub sections. */
static void
hppaelf_create_output_section_statements ()
{
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 ("%X%P: can not create BFD %E\n");
return;
}
ldlang_add_file (stub_file);
}
/* Walk all the lang statements splicing out any padding statements from
the list. */
static void
hppaelf_delete_padding_statements (list)
lang_statement_list_type *list;
{
lang_statement_union_type *s;
lang_statement_union_type **ps;
for (ps = &list->head; (s = *ps) != NULL; ps = &s->next)
{
switch (s->header.type)
{
/* We want to recursively walk these sections. */
case lang_constructors_statement_enum:
hppaelf_delete_padding_statements (&constructor_list);
break;
case lang_output_section_statement_enum:
hppaelf_delete_padding_statements (&s->output_section_statement.children);
break;
case lang_group_statement_enum:
hppaelf_delete_padding_statements (&s->group_statement.children);
break;
case lang_wild_statement_enum:
hppaelf_delete_padding_statements (&s->wild_statement.children);
break;
/* Here's what we are really looking for. Splice these out of
the list. */
case lang_padding_statement_enum:
*ps = s->next;
if (*ps == NULL)
list->tail = ps;
break;
/* We don't care about these cases. */
case lang_data_statement_enum:
case lang_object_symbols_statement_enum:
case lang_output_statement_enum:
case lang_target_statement_enum:
case lang_input_section_enum:
case lang_input_statement_enum:
case lang_assignment_statement_enum:
case lang_address_statement_enum:
break;
default:
abort ();
break;
}
}
}
struct hook_stub_info
{
lang_statement_list_type add;
asection *input_section;
};
/* Traverse the linker tree to find the spot where the stub goes. */
static boolean hook_in_stub
PARAMS ((struct hook_stub_info *, lang_statement_union_type **));
static boolean
hook_in_stub (info, lp)
struct hook_stub_info *info;
lang_statement_union_type **lp;
{
lang_statement_union_type *l;
boolean ret;
for (; (l = *lp) != NULL; lp = &l->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)
{
/* We've found our section. Insert the stub immediately
before its associated 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;
}
/* Call-back for elf32_hppa_size_stubs. */
/* Create a new stub section, and arrange for it to be linked
immediately before INPUT_SECTION. */
static asection *
hppaelf_add_stub_section (stub_name, input_section)
const char *stub_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_name);
if (stub_sec == NULL)
goto err_ret;
flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
| SEC_HAS_CONTENTS | 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);
wild_doit (&info.add, stub_sec, os, stub_file);
if (info.add.head == NULL)
goto err_ret;
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;
}
/* Another call-back for elf32_hppa_size_stubs. */
static void
hppaelf_layaout_sections_again ()
{
/* If we have changed sizes of the stub sections, then we need
to recalculate all the section offsets. This may mean we need to
add even more stubs. */
/* Delete all the padding statements, they're no longer valid. */
hppaelf_delete_padding_statements (stat_ptr);
/* Resize the sections. */
lang_size_sections (stat_ptr->head, abs_output_section,
&stat_ptr->head, 0, (bfd_vma) 0, false);
/* Redo special stuff. */
ldemul_after_allocation ();
/* Do the assignments again. */
lang_do_assignments (stat_ptr->head, abs_output_section,
(fill_type) 0, (bfd_vma) 0);
}
/* Final emulation specific call. For the PA we use this opportunity
to build linker stubs. */
static void
hppaelf_finish ()
{
/* If generating a relocateable output file, then we don't
have to examine the relocs. */
if (link_info.relocateable)
return;
/* Call into the BFD backend to do the real work. */
if (! elf32_hppa_size_stubs (stub_file->the_bfd,
&link_info,
&hppaelf_add_stub_section,
&hppaelf_layaout_sections_again))
{
einfo ("%X%P: can not size stub section: %E\n");
return;
}
/* Now build the linker stubs. */
if (stub_file->the_bfd->sections != NULL)
{
if (! elf32_hppa_build_stubs (stub_file->the_bfd, &link_info))
einfo ("%X%P: can not build stubs: %E\n");
}
}
EOF
# Put these routines in ld_${EMULATION_NAME}_emulation
#
LDEMUL_SET_OUTPUT_ARCH=hppaelf_set_output_arch
LDEMUL_FINISH=hppaelf_finish
LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=hppaelf_create_output_section_statements