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author | Jing Yu <jingyu@google.com> | 2011-12-20 10:27:58 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2011-12-20 10:27:58 -0800 |
commit | cf3cdbf8b3cda61a619299e7966a83df66244036 (patch) | |
tree | 201e2bcfc955f16802d3257112d29736cb3a3ce8 /binutils-2.21/ld/emultempl/mipself.em | |
parent | e4df3e0a5bb640ccfa2f30ee67fe9b3146b152d6 (diff) | |
download | toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.zip toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.tar.gz toolchain_binutils-cf3cdbf8b3cda61a619299e7966a83df66244036.tar.bz2 |
Add binutils-2.21.
Use --enable-gold=default for dual linker support.
Change-Id: Id1a744c7db58a0b5e7a3be174cdfa875f2f86e49
Diffstat (limited to 'binutils-2.21/ld/emultempl/mipself.em')
-rw-r--r-- | binutils-2.21/ld/emultempl/mipself.em | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/binutils-2.21/ld/emultempl/mipself.em b/binutils-2.21/ld/emultempl/mipself.em new file mode 100644 index 0000000..7a13d4d --- /dev/null +++ b/binutils-2.21/ld/emultempl/mipself.em @@ -0,0 +1,241 @@ +# This shell script emits a C file. -*- C -*- +# Copyright 2004, 2006, 2007, 2008 Free Software Foundation, Inc. +# +# 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. + +fragment <<EOF + +#include "ldctor.h" +#include "elf/mips.h" +#include "elfxx-mips.h" + +#define is_mips_elf(bfd) \ + (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ + && elf_tdata (bfd) != NULL \ + && elf_object_id (bfd) == MIPS_ELF_DATA) + +/* Fake input file for stubs. */ +static lang_input_statement_type *stub_file; +static bfd *stub_bfd; + +static void +mips_after_parse (void) +{ + /* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different + ways. .gnu.hash needs symbols to be grouped by hash code whereas the + MIPS ABI requires a mapping between the GOT and the symbol table. */ + if (link_info.emit_gnu_hash) + { + einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n"); + link_info.emit_hash = TRUE; + link_info.emit_gnu_hash = FALSE; + } + after_parse_default (); +} + +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 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 (info->input_section == NULL + || 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; +} + +/* Create a new stub section called STUB_SEC_NAME and arrange for it to + be linked in OUTPUT_SECTION. The section should go at the beginning of + OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately + before INPUT_SECTION. */ + +static asection * +mips_add_stub_section (const char *stub_sec_name, asection *input_section, + asection *output_section) +{ + asection *stub_sec; + flagword flags; + const char *secname; + lang_output_section_statement_type *os; + struct hook_stub_info info; + + /* Create the stub file, if we haven't already. */ + if (stub_file == NULL) + { + stub_file = lang_add_input_file ("linker stubs", + lang_input_file_is_fake_enum, + NULL); + stub_bfd = bfd_create ("linker stubs", link_info.output_bfd); + if (stub_bfd == NULL + || !bfd_set_arch_mach (stub_bfd, + bfd_get_arch (link_info.output_bfd), + bfd_get_mach (link_info.output_bfd))) + { + einfo ("%F%P: can not create BFD %E\n"); + return NULL; + } + stub_bfd->flags |= BFD_LINKER_CREATED; + stub_file->the_bfd = stub_bfd; + ldlang_add_file (stub_file); + } + + /* Create the section. */ + stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name); + if (stub_sec == NULL) + goto err_ret; + + /* Set the flags. */ + flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE + | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); + if (!bfd_set_section_flags (stub_bfd, stub_sec, flags)) + goto err_ret; + + /* Create an output section statement. */ + secname = bfd_get_section_name (output_section->owner, output_section); + os = lang_output_section_find (secname); + + /* Initialize a statement list that contains only the new statement. */ + lang_list_init (&info.add); + lang_add_section (&info.add, stub_sec, os); + if (info.add.head == NULL) + goto err_ret; + + /* Insert the new statement in the appropriate place. */ + info.input_section = input_section; + 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; +} + +/* This is called before the input files are opened. */ + +static void +mips_create_output_section_statements (void) +{ + if (is_mips_elf (link_info.output_bfd)) + _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); +} + +/* This is called after we have merged the private data of the input bfds. */ + +static void +mips_before_allocation (void) +{ + flagword flags; + + flags = elf_elfheader (link_info.output_bfd)->e_flags; + if (!link_info.shared + && !link_info.nocopyreloc + && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC) + _bfd_mips_elf_use_plts_and_copy_relocs (&link_info); + + gld${EMULATION_NAME}_before_allocation (); +} + +/* Avoid processing the fake stub_file in vercheck, stat_needed and + check_needed routines. */ + +static void (*real_func) (lang_input_statement_type *); + +static void mips_for_each_input_file_wrapper (lang_input_statement_type *l) +{ + if (l != stub_file) + (*real_func) (l); +} + +static void +mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *)) +{ + real_func = func; + lang_for_each_input_file (&mips_for_each_input_file_wrapper); +} + +#define lang_for_each_input_file mips_lang_for_each_input_file + +EOF + +LDEMUL_AFTER_PARSE=mips_after_parse +LDEMUL_BEFORE_ALLOCATION=mips_before_allocation +LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements |