ChangeLog rotatation and copyright year update
[deliverable/binutils-gdb.git] / ld / emultempl / mipself.em
CommitLineData
73934d31 1# This shell script emits a C file. -*- C -*-
b90efa5b 2# Copyright (C) 2004-2015 Free Software Foundation, Inc.
73934d31 3#
f96b4a7b 4# This file is part of the GNU Binutils.
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5#
6# This program is free software; you can redistribute it and/or modify
7# it under the terms of the GNU General Public License as published by
f96b4a7b 8# the Free Software Foundation; either version 3 of the License, or
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9# (at your option) any later version.
10#
11# This program is distributed in the hope that it will be useful,
12# but WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14# GNU General Public License for more details.
15#
16# You should have received a copy of the GNU General Public License
f96b4a7b
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17# along with this program; if not, write to the Free Software
18# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19# MA 02110-1301, USA.
73934d31 20
92b93329 21fragment <<EOF
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22
23#include "ldctor.h"
24#include "elf/mips.h"
25#include "elfxx-mips.h"
26
27#define is_mips_elf(bfd) \
28 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
29 && elf_tdata (bfd) != NULL \
4dfe6ac6 30 && elf_object_id (bfd) == MIPS_ELF_DATA)
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31
32/* Fake input file for stubs. */
33static lang_input_statement_type *stub_file;
34static bfd *stub_bfd;
35
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36static bfd_boolean insn32;
37
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38static void
39mips_after_parse (void)
40{
41 /* .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
42 ways. .gnu.hash needs symbols to be grouped by hash code whereas the
43 MIPS ABI requires a mapping between the GOT and the symbol table. */
44 if (link_info.emit_gnu_hash)
45 {
46 einfo ("%X%P: .gnu.hash is incompatible with the MIPS ABI\n");
47 link_info.emit_hash = TRUE;
48 link_info.emit_gnu_hash = FALSE;
49 }
eeaa4577 50 after_parse_default ();
73934d31 51}
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52
53struct hook_stub_info
54{
55 lang_statement_list_type add;
56 asection *input_section;
57};
58
59/* Traverse the linker tree to find the spot where the stub goes. */
60
61static bfd_boolean
62hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
63{
64 lang_statement_union_type *l;
65 bfd_boolean ret;
66
67 for (; (l = *lp) != NULL; lp = &l->header.next)
68 {
69 switch (l->header.type)
70 {
71 case lang_constructors_statement_enum:
72 ret = hook_in_stub (info, &constructor_list.head);
73 if (ret)
74 return ret;
75 break;
76
77 case lang_output_section_statement_enum:
78 ret = hook_in_stub (info,
79 &l->output_section_statement.children.head);
80 if (ret)
81 return ret;
82 break;
83
84 case lang_wild_statement_enum:
85 ret = hook_in_stub (info, &l->wild_statement.children.head);
86 if (ret)
87 return ret;
88 break;
89
90 case lang_group_statement_enum:
91 ret = hook_in_stub (info, &l->group_statement.children.head);
92 if (ret)
93 return ret;
94 break;
95
96 case lang_input_section_enum:
97 if (info->input_section == NULL
98 || l->input_section.section == info->input_section)
99 {
100 /* We've found our section. Insert the stub immediately
101 before its associated input section. */
102 *lp = info->add.head;
103 *(info->add.tail) = l;
104 return TRUE;
105 }
106 break;
107
108 case lang_data_statement_enum:
109 case lang_reloc_statement_enum:
110 case lang_object_symbols_statement_enum:
111 case lang_output_statement_enum:
112 case lang_target_statement_enum:
113 case lang_input_statement_enum:
114 case lang_assignment_statement_enum:
115 case lang_padding_statement_enum:
116 case lang_address_statement_enum:
117 case lang_fill_statement_enum:
118 break;
119
120 default:
121 FAIL ();
122 break;
123 }
124 }
125 return FALSE;
126}
127
128/* Create a new stub section called STUB_SEC_NAME and arrange for it to
129 be linked in OUTPUT_SECTION. The section should go at the beginning of
130 OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately
131 before INPUT_SECTION. */
132
133static asection *
134mips_add_stub_section (const char *stub_sec_name, asection *input_section,
135 asection *output_section)
136{
137 asection *stub_sec;
138 flagword flags;
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139 lang_output_section_statement_type *os;
140 struct hook_stub_info info;
141
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142 /* PR 12845: If the input section has been garbage collected it will
143 not have its output section set to *ABS*. */
144 if (bfd_is_abs_section (output_section))
145 return NULL;
146
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147 /* Create the stub file, if we haven't already. */
148 if (stub_file == NULL)
149 {
150 stub_file = lang_add_input_file ("linker stubs",
151 lang_input_file_is_fake_enum,
152 NULL);
153 stub_bfd = bfd_create ("linker stubs", link_info.output_bfd);
154 if (stub_bfd == NULL
155 || !bfd_set_arch_mach (stub_bfd,
156 bfd_get_arch (link_info.output_bfd),
157 bfd_get_mach (link_info.output_bfd)))
158 {
159 einfo ("%F%P: can not create BFD %E\n");
160 return NULL;
161 }
162 stub_bfd->flags |= BFD_LINKER_CREATED;
163 stub_file->the_bfd = stub_bfd;
164 ldlang_add_file (stub_file);
165 }
166
167 /* Create the section. */
168 stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name);
169 if (stub_sec == NULL)
170 goto err_ret;
171
172 /* Set the flags. */
173 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
174 | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP);
175 if (!bfd_set_section_flags (stub_bfd, stub_sec, flags))
176 goto err_ret;
177
24ef1aa7 178 os = lang_output_section_get (output_section);
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179
180 /* Initialize a statement list that contains only the new statement. */
181 lang_list_init (&info.add);
b9c361e0 182 lang_add_section (&info.add, stub_sec, NULL, os);
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183 if (info.add.head == NULL)
184 goto err_ret;
185
186 /* Insert the new statement in the appropriate place. */
187 info.input_section = input_section;
188 if (hook_in_stub (&info, &os->children.head))
189 return stub_sec;
190
191 err_ret:
192 einfo ("%X%P: can not make stub section: %E\n");
193 return NULL;
194}
195
196/* This is called before the input files are opened. */
197
198static void
199mips_create_output_section_statements (void)
200{
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201 struct elf_link_hash_table *htab;
202
203 htab = elf_hash_table (&link_info);
204 if (is_elf_hash_table (htab) && is_mips_elf (link_info.output_bfd))
205 _bfd_mips_elf_insn32 (&link_info, insn32);
206
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207 if (is_mips_elf (link_info.output_bfd))
208 _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section);
209}
210
211/* This is called after we have merged the private data of the input bfds. */
212
213static void
214mips_before_allocation (void)
215{
216 flagword flags;
217
218 flags = elf_elfheader (link_info.output_bfd)->e_flags;
219 if (!link_info.shared
220 && !link_info.nocopyreloc
221 && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC)
222 _bfd_mips_elf_use_plts_and_copy_relocs (&link_info);
223
224 gld${EMULATION_NAME}_before_allocation ();
225}
226
227/* Avoid processing the fake stub_file in vercheck, stat_needed and
228 check_needed routines. */
229
230static void (*real_func) (lang_input_statement_type *);
231
232static void mips_for_each_input_file_wrapper (lang_input_statement_type *l)
233{
234 if (l != stub_file)
235 (*real_func) (l);
236}
237
238static void
239mips_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
240{
241 real_func = func;
242 lang_for_each_input_file (&mips_for_each_input_file_wrapper);
243}
244
245#define lang_for_each_input_file mips_lang_for_each_input_file
246
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247EOF
248
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249# Define some shell vars to insert bits of code into the standard elf
250# parse_args and list_options functions.
251#
252PARSE_AND_LIST_PROLOGUE='
253#define OPTION_INSN32 301
254#define OPTION_NO_INSN32 (OPTION_INSN32 + 1)
255'
256
257PARSE_AND_LIST_LONGOPTS='
258 { "insn32", no_argument, NULL, OPTION_INSN32 },
259 { "no-insn32", no_argument, NULL, OPTION_NO_INSN32 },
260'
261
262PARSE_AND_LIST_OPTIONS='
263 fprintf (file, _("\
264 --insn32 Only generate 32-bit microMIPS instructions\n"
265 ));
266 fprintf (file, _("\
267 --no-insn32 Generate all microMIPS instructions\n"
268 ));
269'
270
271PARSE_AND_LIST_ARGS_CASES='
272 case OPTION_INSN32:
273 insn32 = TRUE;
274 break;
275
276 case OPTION_NO_INSN32:
277 insn32 = FALSE;
278 break;
279'
280
73934d31 281LDEMUL_AFTER_PARSE=mips_after_parse
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282LDEMUL_BEFORE_ALLOCATION=mips_before_allocation
283LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements
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