1 # This shell script emits a C file. -*- C -*-
2 # Copyright (C) 2012-2014 Free Software Foundation, Inc.
3 # Contributed by Andes Technology Corporation.
5 # This file is part of the GNU Binutils.
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.
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.
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,
27 #include "elf/nds32.h"
28 #include "bfd_stdint.h"
29 #include "elf32-nds32.h"
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. */
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
50 nds32_elf_create_output_section_statements (void)
52 if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL)
54 /* Check the output target is nds32. */
55 einfo ("%F%X%P: error: Cannot change output format whilst linking NDS32 binaries.\n");
59 bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp,
63 target_optimize, relax_status, relax_round,
64 ex9_export_file, ex9_import_file,
65 update_ex9_table, ex9_limit,
66 ex9_loop_aware, ifc_loop_aware);
70 nds32_elf_after_parse (void)
72 if (link_info.relocatable)
75 if (!RELAXATION_ENABLED)
77 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
78 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
82 if (ex9_import_file != NULL)
84 ex9_export_file = NULL;
85 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
92 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
93 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
96 after_parse_default ();
100 nds32_elf_after_open (void)
102 unsigned int arch_ver = (unsigned int)-1;
103 unsigned int abi_ver = (unsigned int)-1;
106 /* For now, make sure all object files are of the same architecture.
107 We may try to merge object files with different architecture together. */
108 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
110 if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH))
111 arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ;
113 if (abi_ver == (unsigned int)-1)
115 /* Initialize ABI version, if not ABI0.
116 (OS uses empty file to create empty ELF with ABI0). */
117 if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0)
118 abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ;
120 else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0
121 && abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI))
123 /* Incompatible objects. */
124 einfo (_("%F%B: ABI version of object files mismatched\n"), abfd);
127 /* Append .ex9.itable section in the last input object file. */
128 if (!link_info.relocatable && abfd->link_next == NULL)
131 struct bfd_link_hash_entry *h;
132 itable = bfd_make_section_with_flags (abfd, ".ex9.itable",
133 SEC_CODE | SEC_ALLOC | SEC_LOAD
134 | SEC_HAS_CONTENTS | SEC_READONLY
135 | SEC_IN_MEMORY | SEC_KEEP);
139 itable->alignment_power = 2;
140 if ((target_optimize & NDS32_RELAX_EX9_ON))
142 itable->size = 0x1000;
143 itable->contents = bfd_zalloc (abfd, itable->size);
148 itable->contents = bfd_zalloc (abfd, itable->size);
149 bfd_putb32 (INSN_BREAK_EA,itable->contents);
152 /* Add a symbol in the head of ex9.itable to objdump clearly. */
153 h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_",
154 FALSE, FALSE, FALSE);
155 _bfd_generic_link_add_one_symbol
156 (&link_info, link_info.output_bfd, "_EX9_BASE_",
157 BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE,
158 get_elf_backend_data (link_info.output_bfd)->collect, &h);
163 /* Check object files if the target is dynamic linked executable
165 if (elf_hash_table (&link_info)->dynamic_sections_created
166 || link_info.shared || link_info.pie)
168 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
170 if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC))
172 /* Non-PIC object file is used. */
173 if (link_info.shared || link_info.pie)
175 /* For PIE or shared object, all input must be PIC. */
176 einfo (_("%B: must use -fpic to compile this file for shared object or PIE\n"), abfd);
180 /* Dynamic linked executable with SDA and non-PIC.
181 Turn off load/store relaxtion. */
182 load_store_relax = 0 ;
187 /* Turn off relax when building shared object or PIE
188 until we can support their relaxation. */
191 /* Call the standard elf routine. */
192 gld${EMULATION_NAME}_after_open ();
195 static void nds32_elf_relax_stub (bfd_boolean relax)
197 /* Re-caculate memory map address. */
198 lang_do_assignments (lang_assigning_phase_enum);
199 lang_reset_memory_regions ();
200 one_lang_size_sections_pass (&relax, FALSE);
204 nds32_elf_after_allocation (void)
206 struct elf_nds32_link_hash_table *table;
207 table = nds32_elf_hash_table (&link_info);
209 /* Call default after allocation callback.
210 1. This is where relaxation is done.
211 2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table.
212 3. Any relaxation requires relax being done must be called after it. */
213 gld${EMULATION_NAME}_after_allocation ();
219 if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON)
220 && !(table->relax_status & NDS32_RELAX_JUMP_IFC_DONE))
222 table->relax_round = NDS32_RELAX_JUMP_IFC_ROUND;
223 /* Traverse all sections to build j and jal list. */
224 nds32_elf_relax_stub (TRUE);
226 /* Replace with ifc. */
227 if (!nds32_elf_ifc_finish (&link_info))
228 einfo (_("%F: Please report this bug. IFC error.\n"));
229 table->relax_round = NDS32_RELAX_NONE_ROUND;
231 /* Adjust address after ifcall. */
232 nds32_elf_relax_stub (FALSE);
234 if (!nds32_elf_ifc_reloc ())
235 einfo (_("%F: Please report this bug. IFC error.\n"));
238 /* EX9 Instruction Table Relaxation. */
239 if (!link_info.relocatable && !nds32_elf_ex9_itb_base (&link_info))
240 einfo (_("%F: Please report this bug. Ex9 relocation error.\n"));
243 /* Generate ex9 table. */
244 if ((target_optimize & NDS32_RELAX_EX9_ON)
245 && !(table->relax_status & NDS32_RELAX_EX9_DONE))
247 /* Ex9 entry point. */
248 table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
250 /* Initialize ex9 hash table. */
251 if (!nds32_elf_ex9_init ())
254 /* Build ex9 instruction table. */
255 nds32_elf_relax_stub (TRUE);
256 nds32_elf_ex9_finish (&link_info);
257 /* Replace with ex9.it. */
258 nds32_elf_relax_stub (TRUE);
259 table->relax_round = NDS32_RELAX_NONE_ROUND;
262 if (target_optimize & NDS32_RELAX_JUMP_IFC_ON)
263 if (!nds32_elf_ifc_finish (&link_info))
264 einfo (_("%F: Please report this bug. IFC error.\n"));
266 /* Re-caculate memory map address. */
267 lang_do_assignments (lang_assigning_phase_enum);
268 /* Relocation for .ex9.itable. */
269 nds32_elf_ex9_reloc_jmp (&link_info);
271 else if (ex9_import_file != NULL
272 && !(table->relax_status = NDS32_RELAX_EX9_DONE))
274 /* Import ex9 table. */
276 if (update_ex9_table == 1)
278 /* Build ex9 table. */
279 table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
280 /* Initialize ex9 hash table. */
281 if (!nds32_elf_ex9_init ())
283 /* Build ex9 table. */
284 nds32_elf_relax_stub (TRUE);
286 /* Relocation for .ex9.itable. */
287 lang_do_assignments (lang_assigning_phase_enum);
288 nds32_elf_ex9_reloc_jmp (&link_info);
290 nds32_elf_ex9_import_table (&link_info);
292 /* Replace with ex9.it. */
293 table->relax_round = NDS32_RELAX_EX9_REPLACE_ROUND;
294 table->relax_status |= NDS32_RELAX_EX9_DONE;
295 nds32_elf_relax_stub (TRUE);
300 # Define some shell vars to insert bits of code into the standard elf
301 # parse_args and list_options functions.
303 PARSE_AND_LIST_PROLOGUE='
304 #define OPTION_BASELINE 301
305 #define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1)
306 #define OPTION_FP_AS_GP (OPTION_BASELINE + 2)
307 #define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3)
308 #define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4)
309 #define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5)
310 #define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6)
312 /* These are only available to ex9. */
313 #if defined NDS32_EX9_EXT
314 #define OPTION_EX9_BASELINE 320
315 #define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1)
316 #define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2)
317 #define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3)
318 #define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4)
319 #define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5)
320 #define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6)
321 #define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7)
324 /* These are only available to link-time ifc. */
325 #if defined NDS32_IFC_EXT
326 #define OPTION_IFC_BASELINE 340
327 #define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1)
328 #define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2)
329 #define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3)
332 PARSE_AND_LIST_LONGOPTS='
333 { "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP},
334 { "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP},
335 { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
336 /* These are deprecated options. Remove them in the future. */
337 { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
338 { "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE},
339 { "mbaseline", required_argument, NULL, OPTION_BASELINE},
340 { "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS},
341 { "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP},
342 { "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP},
343 { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
344 /* These are specific optioins for ex9-ext support. */
345 #if defined NDS32_EX9_EXT
346 { "mex9", no_argument, NULL, OPTION_EX9_TABLE},
347 { "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE},
348 { "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9},
349 { "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9},
350 { "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9},
351 { "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT},
352 { "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP},
354 /* These are specific optioins for ifc-ext support. */
355 #if defined NDS32_IFC_EXT
356 { "mifc", no_argument, NULL, OPTION_JUMP_IFC},
357 { "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC},
358 { "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP},
361 PARSE_AND_LIST_OPTIONS='
363 --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\
364 --mexport-symbols=FILE Exporting symbols in linker script\n\
367 #if defined NDS32_EX9_EXT
369 --m[no-]ex9 Disable/enable link-time EX9 relaxation\n\
370 --mexport-ex9=FILE Export EX9 table after linking\n\
371 --mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\
372 --mupdate-ex9 Update existing EX9 table\n\
373 --mex9-limit=NUM Maximum number of entries in ex9 table\n\
374 --mex9-loop-aware Avoid generate EX9 instruction inside loop\n\
378 #if defined NDS32_IFC_EXT
380 --m[no-]ifc Disable/enable link-time IFC optimization\n\
381 --mifc-loop-aware Avoid generate IFC instruction inside loop\n\
385 PARSE_AND_LIST_ARGS_CASES='
386 case OPTION_BASELINE:
387 einfo ("%P: --mbaseline is not used anymore.\n");
389 case OPTION_ELIM_GC_RELOCS:
390 eliminate_gc_relocs = 1;
392 case OPTION_FP_AS_GP:
393 case OPTION_NO_FP_AS_GP:
394 relax_fp_as_gp = (optc == OPTION_FP_AS_GP);
396 case OPTION_REDUCE_FP_UPDATE:
397 case OPTION_NO_REDUCE_FP_UPDATE:
398 einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n");
400 case OPTION_EXPORT_SYMBOLS:
402 einfo (_("Missing file for --mgen-symbol-ld-script.\n"), optarg);
404 if(strcmp (optarg, "-") == 0)
405 sym_ld_script = stdout;
408 sym_ld_script = fopen (optarg, FOPEN_WT);
409 if(sym_ld_script == NULL)
410 einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg);
413 #if defined NDS32_EX9_EXT
414 case OPTION_EX9_TABLE:
415 target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
417 case OPTION_NO_EX9_TABLE:
418 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
420 case OPTION_EXPORT_EX9:
422 einfo (_("Missing file for --mexport-ex9=<file>.\n"));
424 if(strcmp (optarg, "-") == 0)
425 ex9_export_file = stdout;
428 ex9_export_file = fopen (optarg, FOPEN_WT);
429 if(ex9_export_file == NULL)
430 einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg);
433 case OPTION_IMPORT_EX9:
435 einfo (_("Missing file for --mimport-ex9=<file>.\n"));
437 ex9_import_file = fopen (optarg, "r+");
438 if(ex9_import_file == NULL)
439 einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg);
441 case OPTION_UPDATE_EX9:
442 update_ex9_table = 1;
444 case OPTION_EX9_LIMIT:
447 ex9_limit = atoi (optarg);
448 if (ex9_limit > 511 || ex9_limit < 1)
450 einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n"));
455 case OPTION_EX9_LOOP:
456 target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
460 #if defined NDS32_IFC_EXT
461 case OPTION_JUMP_IFC:
462 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
464 case OPTION_NO_JUMP_IFC:
465 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
467 case OPTION_IFC_LOOP:
468 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
473 LDEMUL_AFTER_OPEN=nds32_elf_after_open
474 LDEMUL_AFTER_PARSE=nds32_elf_after_parse
475 LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation
476 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements