# This shell script emits a C file. -*- C -*-
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# This shell script emits a C file. -*- C -*-
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# Copyright 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
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# Copyright 2004, 2006, 2007, 2008 Free Software Foundation, Inc.
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#
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#
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# This file is part of the GNU Binutils.
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# This file is part of the GNU Binutils.
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#
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#
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# This program is free software; you can redistribute it and/or modify
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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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# 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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# 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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# (at your option) any later version.
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#
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#
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# This program is distributed in the hope that it will be useful,
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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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# 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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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# GNU General Public License for more details.
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#
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#
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# You should have received a copy of the GNU General Public License
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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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# 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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# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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# MA 02110-1301, USA.
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# MA 02110-1301, USA.
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fragment <
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fragment <
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#include "ldctor.h"
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#include "ldctor.h"
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#include "elf/mips.h"
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#include "elf/mips.h"
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#include "elfxx-mips.h"
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#include "elfxx-mips.h"
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#define is_mips_elf(bfd) \
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#define is_mips_elf(bfd) \
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(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
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(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
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&& elf_tdata (bfd) != NULL \
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&& elf_tdata (bfd) != NULL \
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&& elf_object_id (bfd) == MIPS_ELF_DATA)
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&& elf_object_id (bfd) == MIPS_ELF_DATA)
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/* Fake input file for stubs. */
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/* Fake input file for stubs. */
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static lang_input_statement_type *stub_file;
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static lang_input_statement_type *stub_file;
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static bfd *stub_bfd;
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static bfd *stub_bfd;
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static void
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static void
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mips_after_parse (void)
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mips_after_parse (void)
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{
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{
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/* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
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/* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
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ways. .gnu.hash needs symbols to be grouped by hash code whereas the
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ways. .gnu.hash needs symbols to be grouped by hash code whereas the
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MIPS ABI requires a mapping between the GOT and the symbol table. */
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MIPS ABI requires a mapping between the GOT and the symbol table. */
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if (link_info.emit_gnu_hash)
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if (link_info.emit_gnu_hash)
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{
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{
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einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n");
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einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n");
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link_info.emit_hash = TRUE;
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link_info.emit_hash = TRUE;
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link_info.emit_gnu_hash = FALSE;
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link_info.emit_gnu_hash = FALSE;
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}
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}
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after_parse_default ();
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after_parse_default ();
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}
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}
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struct hook_stub_info
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struct hook_stub_info
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{
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{
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lang_statement_list_type add;
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lang_statement_list_type add;
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asection *input_section;
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asection *input_section;
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};
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};
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/* Traverse the linker tree to find the spot where the stub goes. */
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/* Traverse the linker tree to find the spot where the stub goes. */
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static bfd_boolean
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static bfd_boolean
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hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
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hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
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{
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{
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lang_statement_union_type *l;
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lang_statement_union_type *l;
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bfd_boolean ret;
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bfd_boolean ret;
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for (; (l = *lp) != NULL; lp = &l->header.next)
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for (; (l = *lp) != NULL; lp = &l->header.next)
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{
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{
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switch (l->header.type)
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switch (l->header.type)
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{
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{
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case lang_constructors_statement_enum:
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case lang_constructors_statement_enum:
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ret = hook_in_stub (info, &constructor_list.head);
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ret = hook_in_stub (info, &constructor_list.head);
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if (ret)
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if (ret)
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return ret;
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return ret;
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break;
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break;
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case lang_output_section_statement_enum:
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case lang_output_section_statement_enum:
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ret = hook_in_stub (info,
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ret = hook_in_stub (info,
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&l->output_section_statement.children.head);
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&l->output_section_statement.children.head);
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if (ret)
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if (ret)
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return ret;
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return ret;
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break;
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break;
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case lang_wild_statement_enum:
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case lang_wild_statement_enum:
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ret = hook_in_stub (info, &l->wild_statement.children.head);
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ret = hook_in_stub (info, &l->wild_statement.children.head);
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if (ret)
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if (ret)
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return ret;
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return ret;
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break;
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break;
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case lang_group_statement_enum:
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case lang_group_statement_enum:
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ret = hook_in_stub (info, &l->group_statement.children.head);
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ret = hook_in_stub (info, &l->group_statement.children.head);
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if (ret)
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if (ret)
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return ret;
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return ret;
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break;
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break;
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case lang_input_section_enum:
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case lang_input_section_enum:
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if (info->input_section == NULL
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if (info->input_section == NULL
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|| l->input_section.section == info->input_section)
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|| l->input_section.section == info->input_section)
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{
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{
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/* We've found our section. Insert the stub immediately
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/* We've found our section. Insert the stub immediately
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before its associated input section. */
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before its associated input section. */
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*lp = info->add.head;
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*lp = info->add.head;
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*(info->add.tail) = l;
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*(info->add.tail) = l;
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return TRUE;
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return TRUE;
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}
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}
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break;
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break;
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case lang_data_statement_enum:
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case lang_data_statement_enum:
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case lang_reloc_statement_enum:
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case lang_reloc_statement_enum:
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case lang_object_symbols_statement_enum:
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case lang_object_symbols_statement_enum:
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case lang_output_statement_enum:
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case lang_output_statement_enum:
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case lang_target_statement_enum:
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case lang_target_statement_enum:
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case lang_input_statement_enum:
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case lang_input_statement_enum:
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case lang_assignment_statement_enum:
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case lang_assignment_statement_enum:
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case lang_padding_statement_enum:
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case lang_padding_statement_enum:
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case lang_address_statement_enum:
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case lang_address_statement_enum:
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case lang_fill_statement_enum:
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case lang_fill_statement_enum:
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break;
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break;
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default:
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default:
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FAIL ();
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FAIL ();
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break;
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break;
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}
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}
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}
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}
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return FALSE;
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return FALSE;
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}
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}
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/* Create a new stub section called STUB_SEC_NAME and arrange for it to
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/* Create a new stub section called STUB_SEC_NAME and arrange for it to
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be linked in OUTPUT_SECTION. The section should go at the beginning of
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be linked in OUTPUT_SECTION. The section should go at the beginning of
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OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately
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OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately
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before INPUT_SECTION. */
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before INPUT_SECTION. */
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static asection *
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static asection *
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mips_add_stub_section (const char *stub_sec_name, asection *input_section,
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mips_add_stub_section (const char *stub_sec_name, asection *input_section,
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asection *output_section)
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asection *output_section)
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{
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{
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asection *stub_sec;
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asection *stub_sec;
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flagword flags;
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flagword flags;
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const char *secname;
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const char *secname;
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lang_output_section_statement_type *os;
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lang_output_section_statement_type *os;
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struct hook_stub_info info;
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struct hook_stub_info info;
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/* PR 12845: If the input section has been garbage collected it will
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not have its output section set to *ABS*. */
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if (bfd_is_abs_section (output_section))
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return NULL;
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/* Create the stub file, if we haven't already. */
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/* Create the stub file, if we haven't already. */
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if (stub_file == NULL)
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if (stub_file == NULL)
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{
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{
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stub_file = lang_add_input_file ("linker stubs",
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stub_file = lang_add_input_file ("linker stubs",
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lang_input_file_is_fake_enum,
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lang_input_file_is_fake_enum,
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NULL);
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NULL);
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stub_bfd = bfd_create ("linker stubs", link_info.output_bfd);
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stub_bfd = bfd_create ("linker stubs", link_info.output_bfd);
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if (stub_bfd == NULL
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if (stub_bfd == NULL
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|| !bfd_set_arch_mach (stub_bfd,
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|| !bfd_set_arch_mach (stub_bfd,
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bfd_get_arch (link_info.output_bfd),
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bfd_get_arch (link_info.output_bfd),
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bfd_get_mach (link_info.output_bfd)))
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bfd_get_mach (link_info.output_bfd)))
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{
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{
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einfo ("%F%P: can not create BFD %E\n");
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einfo ("%F%P: can not create BFD %E\n");
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return NULL;
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return NULL;
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}
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}
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stub_bfd->flags |= BFD_LINKER_CREATED;
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stub_bfd->flags |= BFD_LINKER_CREATED;
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stub_file->the_bfd = stub_bfd;
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stub_file->the_bfd = stub_bfd;
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ldlang_add_file (stub_file);
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ldlang_add_file (stub_file);
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}
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}
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/* Create the section. */
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/* Create the section. */
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stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name);
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stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name);
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if (stub_sec == NULL)
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if (stub_sec == NULL)
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goto err_ret;
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goto err_ret;
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/* Set the flags. */
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/* Set the flags. */
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flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
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flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
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| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
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| SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
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if (!bfd_set_section_flags (stub_bfd, stub_sec, flags))
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if (!bfd_set_section_flags (stub_bfd, stub_sec, flags))
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goto err_ret;
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goto err_ret;
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/* Create an output section statement. */
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/* Create an output section statement. */
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secname = bfd_get_section_name (output_section->owner, output_section);
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secname = bfd_get_section_name (output_section->owner, output_section);
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os = lang_output_section_find (secname);
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os = lang_output_section_find (secname);
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/* Initialize a statement list that contains only the new statement. */
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/* Initialize a statement list that contains only the new statement. */
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lang_list_init (&info.add);
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lang_list_init (&info.add);
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lang_add_section (&info.add, stub_sec, os);
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lang_add_section (&info.add, stub_sec, os);
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if (info.add.head == NULL)
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if (info.add.head == NULL)
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goto err_ret;
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goto err_ret;
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/* Insert the new statement in the appropriate place. */
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/* Insert the new statement in the appropriate place. */
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info.input_section = input_section;
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info.input_section = input_section;
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if (hook_in_stub (&info, &os->children.head))
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if (hook_in_stub (&info, &os->children.head))
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return stub_sec;
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return stub_sec;
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err_ret:
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err_ret:
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einfo ("%X%P: can not make stub section: %E\n");
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einfo ("%X%P: can not make stub section: %E\n");
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return NULL;
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return NULL;
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}
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}
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/* This is called before the input files are opened. */
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/* This is called before the input files are opened. */
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static void
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static void
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mips_create_output_section_statements (void)
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mips_create_output_section_statements (void)
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{
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{
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if (is_mips_elf (link_info.output_bfd))
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if (is_mips_elf (link_info.output_bfd))
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_bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section);
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_bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section);
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}
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}
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/* This is called after we have merged the private data of the input bfds. */
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/* This is called after we have merged the private data of the input bfds. */
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static void
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static void
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mips_before_allocation (void)
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mips_before_allocation (void)
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{
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{
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flagword flags;
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flagword flags;
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flags = elf_elfheader (link_info.output_bfd)->e_flags;
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flags = elf_elfheader (link_info.output_bfd)->e_flags;
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if (!link_info.shared
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if (!link_info.shared
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&& !link_info.nocopyreloc
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&& !link_info.nocopyreloc
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&& (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC)
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&& (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC)
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_bfd_mips_elf_use_plts_and_copy_relocs (&link_info);
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_bfd_mips_elf_use_plts_and_copy_relocs (&link_info);
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gld${EMULATION_NAME}_before_allocation ();
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gld${EMULATION_NAME}_before_allocation ();
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}
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}
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/* Avoid processing the fake stub_file in vercheck, stat_needed and
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/* Avoid processing the fake stub_file in vercheck, stat_needed and
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check_needed routines. */
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check_needed routines. */
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static void (*real_func) (lang_input_statement_type *);
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static void (*real_func) (lang_input_statement_type *);
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static void mips_for_each_input_file_wrapper (lang_input_statement_type *l)
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static void mips_for_each_input_file_wrapper (lang_input_statement_type *l)
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{
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{
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if (l != stub_file)
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if (l != stub_file)
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(*real_func) (l);
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(*real_func) (l);
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}
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}
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static void
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static void
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mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
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mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
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{
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{
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real_func = func;
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real_func = func;
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lang_for_each_input_file (&mips_for_each_input_file_wrapper);
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lang_for_each_input_file (&mips_for_each_input_file_wrapper);
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}
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}
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#define lang_for_each_input_file mips_lang_for_each_input_file
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#define lang_for_each_input_file mips_lang_for_each_input_file
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EOF
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EOF
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LDEMUL_AFTER_PARSE=mips_after_parse
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LDEMUL_AFTER_PARSE=mips_after_parse
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LDEMUL_BEFORE_ALLOCATION=mips_before_allocation
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LDEMUL_BEFORE_ALLOCATION=mips_before_allocation
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LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements
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LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements
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