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35c08157 | 1 | # This shell script emits a C file. -*- C -*- |
b90efa5b | 2 | # Copyright (C) 2012-2015 Free Software Foundation, Inc. |
35c08157 KLC |
3 | # Contributed by Andes Technology Corporation. |
4 | # | |
5 | # This file is part of the GNU Binutils. | |
6 | # | |
7 | # This program is free software; you can redistribute it and/or modify | |
8 | # it under the terms of the GNU General Public License as published by | |
9 | # the Free Software Foundation; either version 3 of the License, or | |
10 | # (at your option) any later version. | |
11 | # | |
12 | # This program is distributed in the hope that it will be useful, | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | # GNU General Public License for more details. | |
16 | # | |
17 | # You should have received a copy of the GNU General Public License | |
18 | # along with this program; if not, write to the Free Software | |
19 | # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | # MA 02110-1301, USA. | |
21 | # | |
22 | ||
23 | fragment <<EOF | |
24 | ||
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
27 | #include "elf/nds32.h" | |
e30d16e9 | 28 | #include "bfd_stdint.h" |
35c08157 KLC |
29 | #include "elf32-nds32.h" |
30 | ||
31 | static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */ | |
32 | static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */ | |
33 | static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */ | |
34 | /* Disable if linking a dynamically linked executable. */ | |
35 | static int load_store_relax = 1; | |
36 | static int target_optimize = 0; /* Switch optimization. */ | |
37 | static int relax_status = 0; /* Finished optimization. */ | |
38 | static int relax_round = 0; /* Going optimization. */ | |
39 | static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */ | |
40 | static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */ | |
41 | static int update_ex9_table = 0; /* --mupdate-ex9. */ | |
42 | static int ex9_limit = 511; | |
43 | static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */ | |
44 | static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */ | |
45 | ||
46 | /* Save the target options into output bfd to avoid using to many global | |
47 | variables. Do this after the output has been created, but before | |
48 | inputs are read. */ | |
49 | static void | |
50 | nds32_elf_create_output_section_statements (void) | |
51 | { | |
52 | if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL) | |
53 | { | |
54 | /* Check the output target is nds32. */ | |
1c8f6a4d KLC |
55 | einfo ("%F%X%P: error: Cannot change output format whilst " |
56 | "linking NDS32 binaries.\n"); | |
35c08157 KLC |
57 | return; |
58 | } | |
59 | ||
60 | bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp, | |
61 | eliminate_gc_relocs, | |
62 | sym_ld_script, | |
63 | load_store_relax, | |
64 | target_optimize, relax_status, relax_round, | |
65 | ex9_export_file, ex9_import_file, | |
66 | update_ex9_table, ex9_limit, | |
67 | ex9_loop_aware, ifc_loop_aware); | |
68 | } | |
69 | ||
70 | static void | |
71 | nds32_elf_after_parse (void) | |
72 | { | |
0e1862bb | 73 | if (bfd_link_relocatable (&link_info)) |
35c08157 KLC |
74 | DISABLE_RELAXATION; |
75 | ||
76 | if (!RELAXATION_ENABLED) | |
77 | { | |
78 | target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); | |
79 | target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); | |
80 | relax_fp_as_gp = 0; | |
81 | } | |
82 | ||
83 | if (ex9_import_file != NULL) | |
84 | { | |
85 | ex9_export_file = NULL; | |
86 | target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); | |
87 | } | |
88 | else | |
89 | update_ex9_table = 0; | |
90 | ||
0e1862bb | 91 | if (bfd_link_pic (&link_info)) |
35c08157 KLC |
92 | { |
93 | target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); | |
94 | target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); | |
95 | } | |
96 | ||
97 | after_parse_default (); | |
98 | } | |
99 | ||
100 | static void | |
101 | nds32_elf_after_open (void) | |
102 | { | |
103 | unsigned int arch_ver = (unsigned int)-1; | |
104 | unsigned int abi_ver = (unsigned int)-1; | |
105 | bfd *abfd; | |
106 | ||
107 | /* For now, make sure all object files are of the same architecture. | |
108 | We may try to merge object files with different architecture together. */ | |
c72f2fb2 | 109 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
35c08157 KLC |
110 | { |
111 | if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH)) | |
112 | arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ; | |
113 | ||
114 | if (abi_ver == (unsigned int)-1) | |
115 | { | |
116 | /* Initialize ABI version, if not ABI0. | |
117 | (OS uses empty file to create empty ELF with ABI0). */ | |
118 | if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0) | |
119 | abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ; | |
120 | } | |
121 | else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0 | |
122 | && abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI)) | |
123 | { | |
124 | /* Incompatible objects. */ | |
125 | einfo (_("%F%B: ABI version of object files mismatched\n"), abfd); | |
126 | } | |
127 | ||
1c8f6a4d | 128 | #if defined NDS32_EX9_EXT |
35c08157 | 129 | /* Append .ex9.itable section in the last input object file. */ |
1c8f6a4d | 130 | if (abfd->link_next == NULL && (target_optimize & NDS32_RELAX_EX9_ON)) |
35c08157 KLC |
131 | { |
132 | asection *itable; | |
133 | struct bfd_link_hash_entry *h; | |
134 | itable = bfd_make_section_with_flags (abfd, ".ex9.itable", | |
135 | SEC_CODE | SEC_ALLOC | SEC_LOAD | |
136 | | SEC_HAS_CONTENTS | SEC_READONLY | |
137 | | SEC_IN_MEMORY | SEC_KEEP); | |
138 | if (itable) | |
139 | { | |
140 | itable->gc_mark = 1; | |
141 | itable->alignment_power = 2; | |
1c8f6a4d KLC |
142 | itable->size = 0x1000; |
143 | itable->contents = bfd_zalloc (abfd, itable->size); | |
35c08157 KLC |
144 | |
145 | /* Add a symbol in the head of ex9.itable to objdump clearly. */ | |
146 | h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_", | |
147 | FALSE, FALSE, FALSE); | |
148 | _bfd_generic_link_add_one_symbol | |
149 | (&link_info, link_info.output_bfd, "_EX9_BASE_", | |
150 | BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE, | |
151 | get_elf_backend_data (link_info.output_bfd)->collect, &h); | |
152 | } | |
153 | } | |
1c8f6a4d | 154 | #endif |
35c08157 KLC |
155 | } |
156 | ||
157 | /* Check object files if the target is dynamic linked executable | |
158 | or shared object. */ | |
159 | if (elf_hash_table (&link_info)->dynamic_sections_created | |
0e1862bb | 160 | || bfd_link_pic (&link_info)) |
35c08157 | 161 | { |
c72f2fb2 | 162 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
35c08157 KLC |
163 | { |
164 | if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC)) | |
165 | { | |
166 | /* Non-PIC object file is used. */ | |
0e1862bb | 167 | if (bfd_link_pic (&link_info)) |
35c08157 KLC |
168 | { |
169 | /* For PIE or shared object, all input must be PIC. */ | |
1c8f6a4d KLC |
170 | einfo (_("%B: must use -fpic to compile this file " |
171 | "for shared object or PIE\n"), abfd); | |
35c08157 KLC |
172 | } |
173 | else | |
174 | { | |
175 | /* Dynamic linked executable with SDA and non-PIC. | |
176 | Turn off load/store relaxtion. */ | |
1c8f6a4d | 177 | /* TODO: This may support in the future. */ |
35c08157 KLC |
178 | load_store_relax = 0 ; |
179 | relax_fp_as_gp = 0; | |
180 | } | |
181 | } | |
182 | } | |
183 | /* Turn off relax when building shared object or PIE | |
184 | until we can support their relaxation. */ | |
185 | } | |
186 | ||
187 | /* Call the standard elf routine. */ | |
188 | gld${EMULATION_NAME}_after_open (); | |
189 | } | |
190 | ||
35c08157 KLC |
191 | static void |
192 | nds32_elf_after_allocation (void) | |
193 | { | |
1c8f6a4d KLC |
194 | if (target_optimize & NDS32_RELAX_EX9_ON |
195 | || (ex9_import_file != NULL && update_ex9_table == 1)) | |
196 | { | |
197 | /* Initialize ex9 hash table. */ | |
198 | if (!nds32_elf_ex9_init ()) | |
199 | return; | |
200 | } | |
35c08157 KLC |
201 | |
202 | /* Call default after allocation callback. | |
203 | 1. This is where relaxation is done. | |
204 | 2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table. | |
205 | 3. Any relaxation requires relax being done must be called after it. */ | |
206 | gld${EMULATION_NAME}_after_allocation (); | |
35c08157 KLC |
207 | } |
208 | ||
209 | EOF | |
210 | # Define some shell vars to insert bits of code into the standard elf | |
211 | # parse_args and list_options functions. | |
212 | # | |
213 | PARSE_AND_LIST_PROLOGUE=' | |
214 | #define OPTION_BASELINE 301 | |
215 | #define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1) | |
216 | #define OPTION_FP_AS_GP (OPTION_BASELINE + 2) | |
217 | #define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3) | |
218 | #define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4) | |
219 | #define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5) | |
220 | #define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6) | |
221 | ||
222 | /* These are only available to ex9. */ | |
223 | #if defined NDS32_EX9_EXT | |
224 | #define OPTION_EX9_BASELINE 320 | |
225 | #define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1) | |
226 | #define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2) | |
227 | #define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3) | |
228 | #define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4) | |
229 | #define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5) | |
230 | #define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6) | |
231 | #define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7) | |
232 | #endif | |
233 | ||
234 | /* These are only available to link-time ifc. */ | |
235 | #if defined NDS32_IFC_EXT | |
236 | #define OPTION_IFC_BASELINE 340 | |
237 | #define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1) | |
238 | #define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2) | |
239 | #define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3) | |
240 | #endif | |
241 | ' | |
242 | PARSE_AND_LIST_LONGOPTS=' | |
243 | { "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP}, | |
244 | { "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP}, | |
1c8f6a4d | 245 | { "mexport-symbols", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, |
35c08157 KLC |
246 | /* These are deprecated options. Remove them in the future. */ |
247 | { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE}, | |
248 | { "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE}, | |
249 | { "mbaseline", required_argument, NULL, OPTION_BASELINE}, | |
250 | { "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS}, | |
251 | { "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP}, | |
252 | { "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP}, | |
253 | { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS}, | |
254 | /* These are specific optioins for ex9-ext support. */ | |
255 | #if defined NDS32_EX9_EXT | |
256 | { "mex9", no_argument, NULL, OPTION_EX9_TABLE}, | |
257 | { "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE}, | |
258 | { "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9}, | |
259 | { "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9}, | |
260 | { "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9}, | |
261 | { "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT}, | |
262 | { "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP}, | |
263 | #endif | |
264 | /* These are specific optioins for ifc-ext support. */ | |
265 | #if defined NDS32_IFC_EXT | |
266 | { "mifc", no_argument, NULL, OPTION_JUMP_IFC}, | |
267 | { "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC}, | |
268 | { "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP}, | |
269 | #endif | |
270 | ' | |
271 | PARSE_AND_LIST_OPTIONS=' | |
272 | fprintf (file, _("\ | |
273 | --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\ | |
274 | --mexport-symbols=FILE Exporting symbols in linker script\n\ | |
275 | ")); | |
276 | ||
277 | #if defined NDS32_EX9_EXT | |
278 | fprintf (file, _("\ | |
279 | --m[no-]ex9 Disable/enable link-time EX9 relaxation\n\ | |
280 | --mexport-ex9=FILE Export EX9 table after linking\n\ | |
281 | --mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\ | |
282 | --mupdate-ex9 Update existing EX9 table\n\ | |
283 | --mex9-limit=NUM Maximum number of entries in ex9 table\n\ | |
284 | --mex9-loop-aware Avoid generate EX9 instruction inside loop\n\ | |
285 | ")); | |
286 | #endif | |
287 | ||
288 | #if defined NDS32_IFC_EXT | |
289 | fprintf (file, _("\ | |
290 | --m[no-]ifc Disable/enable link-time IFC optimization\n\ | |
291 | --mifc-loop-aware Avoid generate IFC instruction inside loop\n\ | |
292 | ")); | |
293 | #endif | |
294 | ' | |
295 | PARSE_AND_LIST_ARGS_CASES=' | |
296 | case OPTION_BASELINE: | |
297 | einfo ("%P: --mbaseline is not used anymore.\n"); | |
298 | break; | |
299 | case OPTION_ELIM_GC_RELOCS: | |
300 | eliminate_gc_relocs = 1; | |
301 | break; | |
302 | case OPTION_FP_AS_GP: | |
303 | case OPTION_NO_FP_AS_GP: | |
304 | relax_fp_as_gp = (optc == OPTION_FP_AS_GP); | |
305 | break; | |
306 | case OPTION_REDUCE_FP_UPDATE: | |
307 | case OPTION_NO_REDUCE_FP_UPDATE: | |
308 | einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n"); | |
309 | break; | |
310 | case OPTION_EXPORT_SYMBOLS: | |
311 | if (!optarg) | |
1c8f6a4d | 312 | einfo (_("Missing file for --mexport-symbols.\n"), optarg); |
35c08157 KLC |
313 | |
314 | if(strcmp (optarg, "-") == 0) | |
315 | sym_ld_script = stdout; | |
316 | else | |
317 | { | |
318 | sym_ld_script = fopen (optarg, FOPEN_WT); | |
319 | if(sym_ld_script == NULL) | |
320 | einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg); | |
321 | } | |
322 | break; | |
323 | #if defined NDS32_EX9_EXT | |
324 | case OPTION_EX9_TABLE: | |
325 | target_optimize = target_optimize | NDS32_RELAX_EX9_ON; | |
326 | break; | |
327 | case OPTION_NO_EX9_TABLE: | |
328 | target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON); | |
329 | break; | |
330 | case OPTION_EXPORT_EX9: | |
331 | if (!optarg) | |
332 | einfo (_("Missing file for --mexport-ex9=<file>.\n")); | |
333 | ||
334 | if(strcmp (optarg, "-") == 0) | |
335 | ex9_export_file = stdout; | |
336 | else | |
337 | { | |
1c8f6a4d | 338 | ex9_export_file = fopen (optarg, "wb"); |
35c08157 KLC |
339 | if(ex9_export_file == NULL) |
340 | einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg); | |
341 | } | |
342 | break; | |
343 | case OPTION_IMPORT_EX9: | |
344 | if (!optarg) | |
345 | einfo (_("Missing file for --mimport-ex9=<file>.\n")); | |
346 | ||
1c8f6a4d | 347 | ex9_import_file = fopen (optarg, "rb+"); |
35c08157 KLC |
348 | if(ex9_import_file == NULL) |
349 | einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg); | |
350 | break; | |
351 | case OPTION_UPDATE_EX9: | |
352 | update_ex9_table = 1; | |
353 | break; | |
354 | case OPTION_EX9_LIMIT: | |
355 | if (optarg) | |
356 | { | |
357 | ex9_limit = atoi (optarg); | |
358 | if (ex9_limit > 511 || ex9_limit < 1) | |
359 | { | |
360 | einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n")); | |
361 | exit (1); | |
362 | } | |
363 | } | |
364 | break; | |
365 | case OPTION_EX9_LOOP: | |
366 | target_optimize = target_optimize | NDS32_RELAX_EX9_ON; | |
367 | ex9_loop_aware = 1; | |
368 | break; | |
369 | #endif | |
370 | #if defined NDS32_IFC_EXT | |
371 | case OPTION_JUMP_IFC: | |
372 | target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; | |
373 | break; | |
374 | case OPTION_NO_JUMP_IFC: | |
375 | target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON); | |
376 | break; | |
377 | case OPTION_IFC_LOOP: | |
378 | target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON; | |
379 | ifc_loop_aware = 1; | |
380 | break; | |
381 | #endif | |
382 | ' | |
383 | LDEMUL_AFTER_OPEN=nds32_elf_after_open | |
384 | LDEMUL_AFTER_PARSE=nds32_elf_after_parse | |
385 | LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation | |
386 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements |