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 "elf32-nds32.h"
30 static int relax_fp_as_gp = 1; /* --mrelax-omit-fp */
31 static int eliminate_gc_relocs = 0; /* --meliminate-gc-relocs */
32 static FILE *sym_ld_script = NULL; /* --mgen-symbol-ld-script=<file> */
33 /* Disable if linking a dynamically linked executable. */
34 static int load_store_relax = 1;
35 static int target_optimize = 0; /* Switch optimization. */
36 static int relax_status = 0; /* Finished optimization. */
37 static int relax_round = 0; /* Going optimization. */
38 static FILE *ex9_export_file = NULL; /* --mexport-ex9=<file> */
39 static FILE *ex9_import_file = NULL; /* --mimport-ex9=<file> */
40 static int update_ex9_table = 0; /* --mupdate-ex9. */
41 static int ex9_limit = 511;
42 static bfd_boolean ex9_loop_aware = FALSE; /* Ignore ex9 if inside a loop. */
43 static bfd_boolean ifc_loop_aware = FALSE; /* Ignore ifc if inside a loop. */
45 /* Save the target options into output bfd to avoid using to many global
46 variables. Do this after the output has been created, but before
49 nds32_elf_create_output_section_statements (void)
51 if (strstr (bfd_get_target (link_info.output_bfd), "nds32") == NULL)
53 /* Check the output target is nds32. */
54 einfo ("%F%X%P: error: Cannot change output format whilst linking NDS32 binaries.\n");
58 bfd_elf32_nds32_set_target_option (&link_info, relax_fp_as_gp,
62 target_optimize, relax_status, relax_round,
63 ex9_export_file, ex9_import_file,
64 update_ex9_table, ex9_limit,
65 ex9_loop_aware, ifc_loop_aware);
69 nds32_elf_after_parse (void)
71 if (link_info.relocatable)
74 if (!RELAXATION_ENABLED)
76 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
77 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
81 if (ex9_import_file != NULL)
83 ex9_export_file = NULL;
84 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
91 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
92 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
95 after_parse_default ();
99 nds32_elf_after_open (void)
101 unsigned int arch_ver = (unsigned int)-1;
102 unsigned int abi_ver = (unsigned int)-1;
105 /* For now, make sure all object files are of the same architecture.
106 We may try to merge object files with different architecture together. */
107 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
109 if (arch_ver == (unsigned int)-1 && E_N1_ARCH != (elf_elfheader (abfd)->e_flags & EF_NDS_ARCH))
110 arch_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ARCH ;
112 if (abi_ver == (unsigned int)-1)
114 /* Initialize ABI version, if not ABI0.
115 (OS uses empty file to create empty ELF with ABI0). */
116 if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0)
117 abi_ver = elf_elfheader (abfd)->e_flags & EF_NDS_ABI ;
119 else if ((elf_elfheader (abfd)->e_flags & EF_NDS_ABI) != 0
120 && abi_ver != (elf_elfheader (abfd)->e_flags & EF_NDS_ABI))
122 /* Incompatible objects. */
123 einfo (_("%F%B: ABI version of object files mismatched\n"), abfd);
126 /* Append .ex9.itable section in the last input object file. */
127 if (!link_info.relocatable && abfd->link_next == NULL)
130 struct bfd_link_hash_entry *h;
131 itable = bfd_make_section_with_flags (abfd, ".ex9.itable",
132 SEC_CODE | SEC_ALLOC | SEC_LOAD
133 | SEC_HAS_CONTENTS | SEC_READONLY
134 | SEC_IN_MEMORY | SEC_KEEP);
138 itable->alignment_power = 2;
139 if ((target_optimize & NDS32_RELAX_EX9_ON))
141 itable->size = 0x1000;
142 itable->contents = bfd_zalloc (abfd, itable->size);
147 itable->contents = bfd_zalloc (abfd, itable->size);
148 bfd_putb32 (INSN_BREAK_EA,itable->contents);
151 /* Add a symbol in the head of ex9.itable to objdump clearly. */
152 h = bfd_link_hash_lookup (link_info.hash, "_EX9_BASE_",
153 FALSE, FALSE, FALSE);
154 _bfd_generic_link_add_one_symbol
155 (&link_info, link_info.output_bfd, "_EX9_BASE_",
156 BSF_GLOBAL | BSF_WEAK, itable, 0, (const char *) NULL, FALSE,
157 get_elf_backend_data (link_info.output_bfd)->collect, &h);
162 /* Check object files if the target is dynamic linked executable
164 if (elf_hash_table (&link_info)->dynamic_sections_created
165 || link_info.shared || link_info.pie)
167 for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link_next)
169 if (!(elf_elfheader (abfd)->e_flags & E_NDS32_HAS_PIC))
171 /* Non-PIC object file is used. */
172 if (link_info.shared || link_info.pie)
174 /* For PIE or shared object, all input must be PIC. */
175 einfo (_("%B: must use -fpic to compile this file for shared object or PIE\n"), abfd);
179 /* Dynamic linked executable with SDA and non-PIC.
180 Turn off load/store relaxtion. */
181 load_store_relax = 0 ;
186 /* Turn off relax when building shared object or PIE
187 until we can support their relaxation. */
190 /* Call the standard elf routine. */
191 gld${EMULATION_NAME}_after_open ();
194 static void nds32_elf_relax_stub (bfd_boolean relax)
196 /* Re-caculate memory map address. */
197 lang_do_assignments (lang_assigning_phase_enum);
198 lang_reset_memory_regions ();
199 one_lang_size_sections_pass (&relax, FALSE);
203 nds32_elf_after_allocation (void)
205 struct elf_nds32_link_hash_table *table;
206 table = nds32_elf_hash_table (&link_info);
208 /* Call default after allocation callback.
209 1. This is where relaxation is done.
210 2. It calls gld${EMULATION_NAME}_map_segments to build ELF segment table.
211 3. Any relaxation requires relax being done must be called after it. */
212 gld${EMULATION_NAME}_after_allocation ();
218 if ((target_optimize & NDS32_RELAX_JUMP_IFC_ON)
219 && !(table->relax_status & NDS32_RELAX_JUMP_IFC_DONE))
221 table->relax_round = NDS32_RELAX_JUMP_IFC_ROUND;
222 /* Traverse all sections to build j and jal list. */
223 nds32_elf_relax_stub (TRUE);
225 /* Replace with ifc. */
226 if (!nds32_elf_ifc_finish (&link_info))
227 einfo (_("%F: Please report this bug. IFC error.\n"));
228 table->relax_round = NDS32_RELAX_NONE_ROUND;
230 /* Adjust address after ifcall. */
231 nds32_elf_relax_stub (FALSE);
233 if (!nds32_elf_ifc_reloc ())
234 einfo (_("%F: Please report this bug. IFC error.\n"));
237 /* EX9 Instruction Table Relaxation. */
238 if (!link_info.relocatable && !nds32_elf_ex9_itb_base (&link_info))
239 einfo (_("%F: Please report this bug. Ex9 relocation error.\n"));
242 /* Generate ex9 table. */
243 if ((target_optimize & NDS32_RELAX_EX9_ON)
244 && !(table->relax_status & NDS32_RELAX_EX9_DONE))
246 /* Ex9 entry point. */
247 table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
249 /* Initialize ex9 hash table. */
250 if (!nds32_elf_ex9_init ())
253 /* Build ex9 instruction table. */
254 nds32_elf_relax_stub (TRUE);
255 nds32_elf_ex9_finish (&link_info);
256 /* Replace with ex9.it. */
257 nds32_elf_relax_stub (TRUE);
258 table->relax_round = NDS32_RELAX_NONE_ROUND;
261 if (target_optimize & NDS32_RELAX_JUMP_IFC_ON)
262 if (!nds32_elf_ifc_finish (&link_info))
263 einfo (_("%F: Please report this bug. IFC error.\n"));
265 /* Re-caculate memory map address. */
266 lang_do_assignments (lang_assigning_phase_enum);
267 /* Relocation for .ex9.itable. */
268 nds32_elf_ex9_reloc_jmp (&link_info);
270 else if (ex9_import_file != NULL
271 && !(table->relax_status = NDS32_RELAX_EX9_DONE))
273 /* Import ex9 table. */
275 if (update_ex9_table == 1)
277 /* Build ex9 table. */
278 table->relax_round = NDS32_RELAX_EX9_BUILD_ROUND;
279 /* Initialize ex9 hash table. */
280 if (!nds32_elf_ex9_init ())
282 /* Build ex9 table. */
283 nds32_elf_relax_stub (TRUE);
285 /* Relocation for .ex9.itable. */
286 lang_do_assignments (lang_assigning_phase_enum);
287 nds32_elf_ex9_reloc_jmp (&link_info);
289 nds32_elf_ex9_import_table (&link_info);
291 /* Replace with ex9.it. */
292 table->relax_round = NDS32_RELAX_EX9_REPLACE_ROUND;
293 table->relax_status |= NDS32_RELAX_EX9_DONE;
294 nds32_elf_relax_stub (TRUE);
299 # Define some shell vars to insert bits of code into the standard elf
300 # parse_args and list_options functions.
302 PARSE_AND_LIST_PROLOGUE='
303 #define OPTION_BASELINE 301
304 #define OPTION_ELIM_GC_RELOCS (OPTION_BASELINE + 1)
305 #define OPTION_FP_AS_GP (OPTION_BASELINE + 2)
306 #define OPTION_NO_FP_AS_GP (OPTION_BASELINE + 3)
307 #define OPTION_REDUCE_FP_UPDATE (OPTION_BASELINE + 4)
308 #define OPTION_NO_REDUCE_FP_UPDATE (OPTION_BASELINE + 5)
309 #define OPTION_EXPORT_SYMBOLS (OPTION_BASELINE + 6)
311 /* These are only available to ex9. */
312 #if defined NDS32_EX9_EXT
313 #define OPTION_EX9_BASELINE 320
314 #define OPTION_EX9_TABLE (OPTION_EX9_BASELINE + 1)
315 #define OPTION_NO_EX9_TABLE (OPTION_EX9_BASELINE + 2)
316 #define OPTION_EXPORT_EX9 (OPTION_EX9_BASELINE + 3)
317 #define OPTION_IMPORT_EX9 (OPTION_EX9_BASELINE + 4)
318 #define OPTION_UPDATE_EX9 (OPTION_EX9_BASELINE + 5)
319 #define OPTION_EX9_LIMIT (OPTION_EX9_BASELINE + 6)
320 #define OPTION_EX9_LOOP (OPTION_EX9_BASELINE + 7)
323 /* These are only available to link-time ifc. */
324 #if defined NDS32_IFC_EXT
325 #define OPTION_IFC_BASELINE 340
326 #define OPTION_JUMP_IFC (OPTION_IFC_BASELINE + 1)
327 #define OPTION_NO_JUMP_IFC (OPTION_IFC_BASELINE + 2)
328 #define OPTION_IFC_LOOP (OPTION_IFC_BASELINE + 3)
331 PARSE_AND_LIST_LONGOPTS='
332 { "mfp-as-gp", no_argument, NULL, OPTION_FP_AS_GP},
333 { "mno-fp-as-gp", no_argument, NULL, OPTION_NO_FP_AS_GP},
334 { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
335 /* These are deprecated options. Remove them in the future. */
336 { "mrelax-reduce-fp-update", no_argument, NULL, OPTION_REDUCE_FP_UPDATE},
337 { "mrelax-no-reduce-fp-update", no_argument, NULL, OPTION_NO_REDUCE_FP_UPDATE},
338 { "mbaseline", required_argument, NULL, OPTION_BASELINE},
339 { "meliminate-gc-relocs", no_argument, NULL, OPTION_ELIM_GC_RELOCS},
340 { "mrelax-omit-fp", no_argument, NULL, OPTION_FP_AS_GP},
341 { "mrelax-no-omit-fp", no_argument, NULL, OPTION_NO_FP_AS_GP},
342 { "mgen-symbol-ld-script", required_argument, NULL, OPTION_EXPORT_SYMBOLS},
343 /* These are specific optioins for ex9-ext support. */
344 #if defined NDS32_EX9_EXT
345 { "mex9", no_argument, NULL, OPTION_EX9_TABLE},
346 { "mno-ex9", no_argument, NULL, OPTION_NO_EX9_TABLE},
347 { "mexport-ex9", required_argument, NULL, OPTION_EXPORT_EX9},
348 { "mimport-ex9", required_argument, NULL, OPTION_IMPORT_EX9},
349 { "mupdate-ex9", no_argument, NULL, OPTION_UPDATE_EX9},
350 { "mex9-limit", required_argument, NULL, OPTION_EX9_LIMIT},
351 { "mex9-loop-aware", no_argument, NULL, OPTION_EX9_LOOP},
353 /* These are specific optioins for ifc-ext support. */
354 #if defined NDS32_IFC_EXT
355 { "mifc", no_argument, NULL, OPTION_JUMP_IFC},
356 { "mno-ifc", no_argument, NULL, OPTION_NO_JUMP_IFC},
357 { "mifc-loop-aware", no_argument, NULL, OPTION_IFC_LOOP},
360 PARSE_AND_LIST_OPTIONS='
362 --m[no-]fp-as-gp Disable/enable fp-as-gp relaxation\n\
363 --mexport-symbols=FILE Exporting symbols in linker script\n\
366 #if defined NDS32_EX9_EXT
368 --m[no-]ex9 Disable/enable link-time EX9 relaxation\n\
369 --mexport-ex9=FILE Export EX9 table after linking\n\
370 --mimport-ex9=FILE Import Ex9 table for EX9 relaxation\n\
371 --mupdate-ex9 Update existing EX9 table\n\
372 --mex9-limit=NUM Maximum number of entries in ex9 table\n\
373 --mex9-loop-aware Avoid generate EX9 instruction inside loop\n\
377 #if defined NDS32_IFC_EXT
379 --m[no-]ifc Disable/enable link-time IFC optimization\n\
380 --mifc-loop-aware Avoid generate IFC instruction inside loop\n\
384 PARSE_AND_LIST_ARGS_CASES='
385 case OPTION_BASELINE:
386 einfo ("%P: --mbaseline is not used anymore.\n");
388 case OPTION_ELIM_GC_RELOCS:
389 eliminate_gc_relocs = 1;
391 case OPTION_FP_AS_GP:
392 case OPTION_NO_FP_AS_GP:
393 relax_fp_as_gp = (optc == OPTION_FP_AS_GP);
395 case OPTION_REDUCE_FP_UPDATE:
396 case OPTION_NO_REDUCE_FP_UPDATE:
397 einfo ("%P: --relax-[no-]reduce-fp-updat is not used anymore.\n");
399 case OPTION_EXPORT_SYMBOLS:
401 einfo (_("Missing file for --mgen-symbol-ld-script.\n"), optarg);
403 if(strcmp (optarg, "-") == 0)
404 sym_ld_script = stdout;
407 sym_ld_script = fopen (optarg, FOPEN_WT);
408 if(sym_ld_script == NULL)
409 einfo (_("%P%F: cannot open map file %s: %E.\n"), optarg);
412 #if defined NDS32_EX9_EXT
413 case OPTION_EX9_TABLE:
414 target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
416 case OPTION_NO_EX9_TABLE:
417 target_optimize = target_optimize & (!NDS32_RELAX_EX9_ON);
419 case OPTION_EXPORT_EX9:
421 einfo (_("Missing file for --mexport-ex9=<file>.\n"));
423 if(strcmp (optarg, "-") == 0)
424 ex9_export_file = stdout;
427 ex9_export_file = fopen (optarg, FOPEN_WT);
428 if(ex9_export_file == NULL)
429 einfo (_("ERROR %P%F: cannot open ex9 export file %s.\n"), optarg);
432 case OPTION_IMPORT_EX9:
434 einfo (_("Missing file for --mimport-ex9=<file>.\n"));
436 ex9_import_file = fopen (optarg, "r+");
437 if(ex9_import_file == NULL)
438 einfo (_("ERROR %P%F: cannot open ex9 import file %s.\n"), optarg);
440 case OPTION_UPDATE_EX9:
441 update_ex9_table = 1;
443 case OPTION_EX9_LIMIT:
446 ex9_limit = atoi (optarg);
447 if (ex9_limit > 511 || ex9_limit < 1)
449 einfo (_("ERROR: the range of ex9_limit must between 1 and 511\n"));
454 case OPTION_EX9_LOOP:
455 target_optimize = target_optimize | NDS32_RELAX_EX9_ON;
459 #if defined NDS32_IFC_EXT
460 case OPTION_JUMP_IFC:
461 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
463 case OPTION_NO_JUMP_IFC:
464 target_optimize = target_optimize & (!NDS32_RELAX_JUMP_IFC_ON);
466 case OPTION_IFC_LOOP:
467 target_optimize = target_optimize | NDS32_RELAX_JUMP_IFC_ON;
472 LDEMUL_AFTER_OPEN=nds32_elf_after_open
473 LDEMUL_AFTER_PARSE=nds32_elf_after_parse
474 LDEMUL_AFTER_ALLOCATION=nds32_elf_after_allocation
475 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=nds32_elf_create_output_section_statements