Commit | Line | Data |
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73934d31 | 1 | # This shell script emits a C file. -*- C -*- |
b3adc24a | 2 | # Copyright (C) 2004-2020 Free Software Foundation, Inc. |
73934d31 | 3 | # |
f96b4a7b | 4 | # This file is part of the GNU Binutils. |
73934d31 RS |
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 |
73934d31 RS |
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 NC |
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 | |
47275900 MR |
21 | case ${target} in |
22 | *-*-*gnu*) | |
23 | gnu_target=TRUE | |
24 | ;; | |
25 | *) | |
26 | gnu_target=FALSE | |
27 | ;; | |
28 | esac | |
29 | ||
92b93329 | 30 | fragment <<EOF |
861fb55a DJ |
31 | |
32 | #include "ldctor.h" | |
33 | #include "elf/mips.h" | |
34 | #include "elfxx-mips.h" | |
35 | ||
36 | #define is_mips_elf(bfd) \ | |
37 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
38 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 39 | && elf_object_id (bfd) == MIPS_ELF_DATA) |
861fb55a DJ |
40 | |
41 | /* Fake input file for stubs. */ | |
42 | static lang_input_statement_type *stub_file; | |
43 | static bfd *stub_bfd; | |
44 | ||
833794fc | 45 | static bfd_boolean insn32; |
8b10b0b3 | 46 | static bfd_boolean ignore_branch_isa; |
3734320d | 47 | static bfd_boolean compact_branches; |
833794fc | 48 | |
861fb55a DJ |
49 | struct hook_stub_info |
50 | { | |
51 | lang_statement_list_type add; | |
52 | asection *input_section; | |
53 | }; | |
54 | ||
55 | /* Traverse the linker tree to find the spot where the stub goes. */ | |
56 | ||
57 | static bfd_boolean | |
58 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) | |
59 | { | |
60 | lang_statement_union_type *l; | |
61 | bfd_boolean ret; | |
62 | ||
63 | for (; (l = *lp) != NULL; lp = &l->header.next) | |
64 | { | |
65 | switch (l->header.type) | |
66 | { | |
67 | case lang_constructors_statement_enum: | |
68 | ret = hook_in_stub (info, &constructor_list.head); | |
69 | if (ret) | |
70 | return ret; | |
71 | break; | |
72 | ||
73 | case lang_output_section_statement_enum: | |
74 | ret = hook_in_stub (info, | |
75 | &l->output_section_statement.children.head); | |
76 | if (ret) | |
77 | return ret; | |
78 | break; | |
79 | ||
80 | case lang_wild_statement_enum: | |
81 | ret = hook_in_stub (info, &l->wild_statement.children.head); | |
82 | if (ret) | |
83 | return ret; | |
84 | break; | |
85 | ||
86 | case lang_group_statement_enum: | |
87 | ret = hook_in_stub (info, &l->group_statement.children.head); | |
88 | if (ret) | |
89 | return ret; | |
90 | break; | |
91 | ||
92 | case lang_input_section_enum: | |
93 | if (info->input_section == NULL | |
94 | || l->input_section.section == info->input_section) | |
95 | { | |
96 | /* We've found our section. Insert the stub immediately | |
97 | before its associated input section. */ | |
98 | *lp = info->add.head; | |
99 | *(info->add.tail) = l; | |
100 | return TRUE; | |
101 | } | |
102 | break; | |
103 | ||
104 | case lang_data_statement_enum: | |
105 | case lang_reloc_statement_enum: | |
106 | case lang_object_symbols_statement_enum: | |
107 | case lang_output_statement_enum: | |
108 | case lang_target_statement_enum: | |
109 | case lang_input_statement_enum: | |
110 | case lang_assignment_statement_enum: | |
111 | case lang_padding_statement_enum: | |
112 | case lang_address_statement_enum: | |
113 | case lang_fill_statement_enum: | |
114 | break; | |
115 | ||
116 | default: | |
117 | FAIL (); | |
118 | break; | |
119 | } | |
120 | } | |
121 | return FALSE; | |
122 | } | |
123 | ||
124 | /* Create a new stub section called STUB_SEC_NAME and arrange for it to | |
125 | be linked in OUTPUT_SECTION. The section should go at the beginning of | |
126 | OUTPUT_SECTION if INPUT_SECTION is null, otherwise it must go immediately | |
127 | before INPUT_SECTION. */ | |
128 | ||
129 | static asection * | |
130 | mips_add_stub_section (const char *stub_sec_name, asection *input_section, | |
131 | asection *output_section) | |
132 | { | |
133 | asection *stub_sec; | |
134 | flagword flags; | |
861fb55a DJ |
135 | lang_output_section_statement_type *os; |
136 | struct hook_stub_info info; | |
137 | ||
ba85c43e NC |
138 | /* PR 12845: If the input section has been garbage collected it will |
139 | not have its output section set to *ABS*. */ | |
140 | if (bfd_is_abs_section (output_section)) | |
141 | return NULL; | |
142 | ||
861fb55a DJ |
143 | /* Create the stub file, if we haven't already. */ |
144 | if (stub_file == NULL) | |
145 | { | |
146 | stub_file = lang_add_input_file ("linker stubs", | |
147 | lang_input_file_is_fake_enum, | |
148 | NULL); | |
149 | stub_bfd = bfd_create ("linker stubs", link_info.output_bfd); | |
150 | if (stub_bfd == NULL | |
151 | || !bfd_set_arch_mach (stub_bfd, | |
152 | bfd_get_arch (link_info.output_bfd), | |
153 | bfd_get_mach (link_info.output_bfd))) | |
154 | { | |
df5f2391 | 155 | einfo (_("%F%P: can not create BFD: %E\n")); |
861fb55a DJ |
156 | return NULL; |
157 | } | |
158 | stub_bfd->flags |= BFD_LINKER_CREATED; | |
159 | stub_file->the_bfd = stub_bfd; | |
160 | ldlang_add_file (stub_file); | |
161 | } | |
162 | ||
163 | /* Create the section. */ | |
164 | stub_sec = bfd_make_section_anyway (stub_bfd, stub_sec_name); | |
165 | if (stub_sec == NULL) | |
166 | goto err_ret; | |
167 | ||
168 | /* Set the flags. */ | |
169 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | |
170 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_KEEP); | |
fd361982 | 171 | if (!bfd_set_section_flags (stub_sec, flags)) |
861fb55a DJ |
172 | goto err_ret; |
173 | ||
24ef1aa7 | 174 | os = lang_output_section_get (output_section); |
861fb55a DJ |
175 | |
176 | /* Initialize a statement list that contains only the new statement. */ | |
177 | lang_list_init (&info.add); | |
b9c361e0 | 178 | lang_add_section (&info.add, stub_sec, NULL, os); |
861fb55a DJ |
179 | if (info.add.head == NULL) |
180 | goto err_ret; | |
181 | ||
182 | /* Insert the new statement in the appropriate place. */ | |
183 | info.input_section = input_section; | |
184 | if (hook_in_stub (&info, &os->children.head)) | |
185 | return stub_sec; | |
186 | ||
187 | err_ret: | |
d003af55 | 188 | einfo (_("%X%P: can not make stub section: %E\n")); |
861fb55a DJ |
189 | return NULL; |
190 | } | |
191 | ||
192 | /* This is called before the input files are opened. */ | |
193 | ||
194 | static void | |
195 | mips_create_output_section_statements (void) | |
196 | { | |
833794fc MR |
197 | struct elf_link_hash_table *htab; |
198 | ||
199 | htab = elf_hash_table (&link_info); | |
200 | if (is_elf_hash_table (htab) && is_mips_elf (link_info.output_bfd)) | |
47275900 MR |
201 | _bfd_mips_elf_linker_flags (&link_info, insn32, ignore_branch_isa, |
202 | ${gnu_target}); | |
833794fc | 203 | |
861fb55a | 204 | if (is_mips_elf (link_info.output_bfd)) |
3734320d MF |
205 | { |
206 | _bfd_mips_elf_compact_branches (&link_info, compact_branches); | |
207 | _bfd_mips_elf_init_stubs (&link_info, mips_add_stub_section); | |
208 | } | |
861fb55a DJ |
209 | } |
210 | ||
211 | /* This is called after we have merged the private data of the input bfds. */ | |
212 | ||
213 | static void | |
214 | mips_before_allocation (void) | |
215 | { | |
e54cb31a MR |
216 | if (is_mips_elf (link_info.output_bfd)) |
217 | { | |
218 | flagword flags; | |
861fb55a | 219 | |
e54cb31a MR |
220 | flags = elf_elfheader (link_info.output_bfd)->e_flags; |
221 | if (!bfd_link_pic (&link_info) | |
222 | && !link_info.nocopyreloc | |
223 | && (flags & (EF_MIPS_PIC | EF_MIPS_CPIC)) == EF_MIPS_CPIC) | |
224 | _bfd_mips_elf_use_plts_and_copy_relocs (&link_info); | |
225 | } | |
861fb55a DJ |
226 | |
227 | gld${EMULATION_NAME}_before_allocation (); | |
228 | } | |
229 | ||
73934d31 RS |
230 | EOF |
231 | ||
833794fc MR |
232 | # Define some shell vars to insert bits of code into the standard elf |
233 | # parse_args and list_options functions. | |
234 | # | |
235 | PARSE_AND_LIST_PROLOGUE=' | |
2f2da8fd MR |
236 | enum |
237 | { | |
238 | OPTION_INSN32 = 301, | |
8b10b0b3 MR |
239 | OPTION_NO_INSN32, |
240 | OPTION_IGNORE_BRANCH_ISA, | |
3734320d MF |
241 | OPTION_NO_IGNORE_BRANCH_ISA, |
242 | OPTION_COMPACT_BRANCHES, | |
243 | OPTION_NO_COMPACT_BRANCHES | |
2f2da8fd | 244 | }; |
833794fc MR |
245 | ' |
246 | ||
247 | PARSE_AND_LIST_LONGOPTS=' | |
248 | { "insn32", no_argument, NULL, OPTION_INSN32 }, | |
249 | { "no-insn32", no_argument, NULL, OPTION_NO_INSN32 }, | |
8b10b0b3 MR |
250 | { "ignore-branch-isa", no_argument, NULL, OPTION_IGNORE_BRANCH_ISA }, |
251 | { "no-ignore-branch-isa", no_argument, NULL, OPTION_NO_IGNORE_BRANCH_ISA }, | |
3734320d MF |
252 | { "compact-branches", no_argument, NULL, OPTION_COMPACT_BRANCHES }, |
253 | { "no-compact-branches", no_argument, NULL, OPTION_NO_COMPACT_BRANCHES }, | |
833794fc MR |
254 | ' |
255 | ||
256 | PARSE_AND_LIST_OPTIONS=' | |
257 | fprintf (file, _("\ | |
258 | --insn32 Only generate 32-bit microMIPS instructions\n" | |
259 | )); | |
260 | fprintf (file, _("\ | |
261 | --no-insn32 Generate all microMIPS instructions\n" | |
262 | )); | |
8b10b0b3 MR |
263 | fprintf (file, _("\ |
264 | --ignore-branch-isa Accept invalid branch relocations requiring\n\ | |
265 | an ISA mode switch\n" | |
266 | )); | |
267 | fprintf (file, _("\ | |
268 | --no-ignore-branch-isa Reject invalid branch relocations requiring\n\ | |
269 | an ISA mode switch\n" | |
270 | )); | |
3734320d MF |
271 | fprintf (file, _("\ |
272 | --compact-branches Generate compact branches/jumps for MIPS R6\n" | |
273 | )); | |
274 | fprintf (file, _("\ | |
275 | --no-compact-branches Generate delay slot branches/jumps for MIPS R6\n" | |
276 | )); | |
833794fc MR |
277 | ' |
278 | ||
279 | PARSE_AND_LIST_ARGS_CASES=' | |
280 | case OPTION_INSN32: | |
281 | insn32 = TRUE; | |
282 | break; | |
283 | ||
284 | case OPTION_NO_INSN32: | |
285 | insn32 = FALSE; | |
286 | break; | |
8b10b0b3 MR |
287 | |
288 | case OPTION_IGNORE_BRANCH_ISA: | |
289 | ignore_branch_isa = TRUE; | |
290 | break; | |
291 | ||
292 | case OPTION_NO_IGNORE_BRANCH_ISA: | |
293 | ignore_branch_isa = FALSE; | |
294 | break; | |
3734320d MF |
295 | |
296 | case OPTION_COMPACT_BRANCHES: | |
297 | compact_branches = TRUE; | |
298 | break; | |
299 | ||
300 | case OPTION_NO_COMPACT_BRANCHES: | |
301 | compact_branches = FALSE; | |
302 | break; | |
833794fc MR |
303 | ' |
304 | ||
861fb55a DJ |
305 | LDEMUL_BEFORE_ALLOCATION=mips_before_allocation |
306 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=mips_create_output_section_statements |