1 /* tc-tilegx.c -- Assemble for a Tile-Gx chip.
2 Copyright (C) 2011-2014 Free Software Foundation, Inc.
3
4 This file is part of GAS, the GNU Assembler.
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
8 the Free Software Foundation; either version 3 of the License, or
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
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. */
20
21 #include "as.h"
22 #include "struc-symbol.h"
23 #include "subsegs.h"
24
25 #include "elf/tilegx.h"
26 #include "opcode/tilegx.h"
27
28 #include "dwarf2dbg.h"
29 #include "dw2gencfi.h"
30
31 #include "safe-ctype.h"
32
33
34 /* Special registers. */
35 #define TREG_IDN0 57
36 #define TREG_IDN1 58
37 #define TREG_UDN0 59
38 #define TREG_UDN1 60
39 #define TREG_UDN2 61
40 #define TREG_UDN3 62
41 #define TREG_ZERO 63
42
43
44 /* Generic assembler global variables which must be defined by all
45 targets. */
46
47 /* The dwarf2 data alignment, adjusted for 32 or 64 bit. */
48 int tilegx_cie_data_alignment;
49
50 /* Characters which always start a comment. */
51 const char comment_chars[] = "#";
52
53 /* Characters which start a comment at the beginning of a line. */
54 const char line_comment_chars[] = "#";
55
56 /* Characters which may be used to separate multiple commands on a
57 single line. */
58 const char line_separator_chars[] = ";";
59
60 /* Characters which are used to indicate an exponent in a floating
61 point number. */
62 const char EXP_CHARS[] = "eE";
63
64 /* Characters which mean that a number is a floating point constant,
65 as in 0d1.0. */
66 const char FLT_CHARS[] = "rRsSfFdDxXpP";
67
68 /* Either 32 or 64. */
69 static int tilegx_arch_size = 64;
70
71
72 const char *
tilegx_target_format(void)73 tilegx_target_format (void)
74 {
75 if (target_big_endian) {
76 return tilegx_arch_size == 64 ? "elf64-tilegx-be" : "elf32-tilegx-be";
77 } else {
78 return tilegx_arch_size == 64 ? "elf64-tilegx-le" : "elf32-tilegx-le";
79 }
80 }
81
82
83 #define OPTION_32 (OPTION_MD_BASE + 0)
84 #define OPTION_64 (OPTION_MD_BASE + 1)
85 #define OPTION_EB (OPTION_MD_BASE + 2)
86 #define OPTION_EL (OPTION_MD_BASE + 3)
87
88 const char *md_shortopts = "VQ:";
89
90 struct option md_longopts[] =
91 {
92 {"32", no_argument, NULL, OPTION_32},
93 {"64", no_argument, NULL, OPTION_64},
94 {"EB", no_argument, NULL, OPTION_EB },
95 {"EL", no_argument, NULL, OPTION_EL },
96 {NULL, no_argument, NULL, 0}
97 };
98
99 size_t md_longopts_size = sizeof (md_longopts);
100
101 int
md_parse_option(int c,char * arg ATTRIBUTE_UNUSED)102 md_parse_option (int c, char *arg ATTRIBUTE_UNUSED)
103 {
104 switch (c)
105 {
106 /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section
107 should be emitted or not. FIXME: Not implemented. */
108 case 'Q':
109 break;
110
111 /* -V: SVR4 argument to print version ID. */
112 case 'V':
113 print_version_id ();
114 break;
115
116 case OPTION_32:
117 tilegx_arch_size = 32;
118 break;
119
120 case OPTION_64:
121 tilegx_arch_size = 64;
122 break;
123
124 case OPTION_EB:
125 target_big_endian = 1;
126 break;
127
128 case OPTION_EL:
129 target_big_endian = 0;
130 break;
131
132 default:
133 return 0;
134 }
135
136 return 1;
137 }
138
139 void
md_show_usage(FILE * stream)140 md_show_usage (FILE *stream)
141 {
142 fprintf (stream, _("\
143 -Q ignored\n\
144 -V print assembler version number\n\
145 -EB/-EL generate big-endian/little-endian code\n\
146 --32/--64 generate 32bit/64bit code\n"));
147 }
148
149
150 /* Extra expression types. */
151
152 #define O_hw0 O_md1
153 #define O_hw1 O_md2
154 #define O_hw2 O_md3
155 #define O_hw3 O_md4
156 #define O_hw0_last O_md5
157 #define O_hw1_last O_md6
158 #define O_hw2_last O_md7
159 #define O_hw0_got O_md8
160 #define O_hw0_last_got O_md9
161 #define O_hw1_last_got O_md10
162 #define O_plt O_md11
163 #define O_hw0_tls_gd O_md12
164 #define O_hw0_last_tls_gd O_md13
165 #define O_hw1_last_tls_gd O_md14
166 #define O_hw0_tls_ie O_md15
167 #define O_hw0_last_tls_ie O_md16
168 #define O_hw1_last_tls_ie O_md17
169 #define O_hw0_tls_le O_md18
170 #define O_hw0_last_tls_le O_md19
171 #define O_hw1_last_tls_le O_md20
172 #define O_tls_gd_call O_md21
173 #define O_tls_gd_add O_md22
174 #define O_tls_ie_load O_md23
175 #define O_tls_add O_md24
176 #define O_hw0_plt O_md25
177 #define O_hw1_plt O_md26
178 #define O_hw1_last_plt O_md27
179 #define O_hw2_last_plt O_md28
180
181 static struct hash_control *special_operator_hash;
182
183 /* Hash tables for instruction mnemonic lookup. */
184 static struct hash_control *op_hash;
185
186 /* Hash table for spr lookup. */
187 static struct hash_control *spr_hash;
188
189 /* True temporarily while parsing an SPR expression. This changes the
190 * namespace to include SPR names. */
191 static int parsing_spr;
192
193 /* Are we currently inside `{ ... }'? */
194 static int inside_bundle;
195
196 struct tilegx_instruction
197 {
198 const struct tilegx_opcode *opcode;
199 tilegx_pipeline pipe;
200 expressionS operand_values[TILEGX_MAX_OPERANDS];
201 };
202
203 /* This keeps track of the current bundle being built up. */
204 static struct tilegx_instruction current_bundle[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];
205
206 /* Index in current_bundle for the next instruction to parse. */
207 static int current_bundle_index;
208
209 /* Allow 'r63' in addition to 'zero', etc. Normally we disallow this as
210 'zero' is not a real register, so using it accidentally would be a
211 nasty bug. For other registers, such as 'sp', code using multiple names
212 for the same physical register is excessively confusing.
213
214 The '.require_canonical_reg_names' pseudo-op turns this error on,
215 and the '.no_require_canonical_reg_names' pseudo-op turns this off.
216 By default the error is on. */
217 static int require_canonical_reg_names;
218
219 /* Allow bundles that do undefined or suspicious things like write
220 two different values to the same register at the same time.
221
222 The '.no_allow_suspicious_bundles' pseudo-op turns this error on,
223 and the '.allow_suspicious_bundles' pseudo-op turns this off. */
224 static int allow_suspicious_bundles;
225
226
227 /* A hash table of main processor registers, mapping each register name
228 to its index.
229
230 Furthermore, if the register number is greater than the number
231 of registers for that processor, the user used an illegal alias
232 for that register (e.g. r63 instead of zero), so we should generate
233 a warning. The attempted register number can be found by clearing
234 NONCANONICAL_REG_NAME_FLAG. */
235 static struct hash_control *main_reg_hash;
236
237
238 /* We cannot unambiguously store a 0 in a hash table and look it up,
239 so we OR in this flag to every canonical register. */
240 #define CANONICAL_REG_NAME_FLAG 0x1000
241
242 /* By default we disallow register aliases like r63, but we record
243 them in the hash table in case the .no_require_canonical_reg_names
244 directive is used. Noncanonical names have this value added to them. */
245 #define NONCANONICAL_REG_NAME_FLAG 0x2000
246
247 /* Discards flags for register hash table entries and returns the
248 reg number. */
249 #define EXTRACT_REGNO(p) ((p) & 63)
250
251 /* This function is called once, at assembler startup time. It should
252 set up all the tables, etc., that the MD part of the assembler will
253 need. */
254
255 void
md_begin(void)256 md_begin (void)
257 {
258 const struct tilegx_opcode *op;
259 int i;
260 int mach = (tilegx_arch_size == 64) ? bfd_mach_tilegx : bfd_mach_tilegx32;
261
262 if (! bfd_set_arch_mach (stdoutput, bfd_arch_tilegx, mach))
263 as_warn (_("Could not set architecture and machine"));
264
265 /* Guarantee text section is aligned. */
266 bfd_set_section_alignment (stdoutput, text_section,
267 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES);
268
269 require_canonical_reg_names = 1;
270 allow_suspicious_bundles = 0;
271 current_bundle_index = 0;
272 inside_bundle = 0;
273
274 tilegx_cie_data_alignment = (tilegx_arch_size == 64 ? -8 : -4);
275
276 /* Initialize special operator hash table. */
277 special_operator_hash = hash_new ();
278 #define INSERT_SPECIAL_OP(name) \
279 hash_insert (special_operator_hash, #name, (void *)O_##name)
280
281 INSERT_SPECIAL_OP (hw0);
282 INSERT_SPECIAL_OP (hw1);
283 INSERT_SPECIAL_OP (hw2);
284 INSERT_SPECIAL_OP (hw3);
285 INSERT_SPECIAL_OP (hw0_last);
286 INSERT_SPECIAL_OP (hw1_last);
287 INSERT_SPECIAL_OP (hw2_last);
288 /* hw3_last is a convenience alias for the equivalent hw3. */
289 hash_insert (special_operator_hash, "hw3_last", (void*)O_hw3);
290 INSERT_SPECIAL_OP (hw0_got);
291 INSERT_SPECIAL_OP (hw0_last_got);
292 INSERT_SPECIAL_OP (hw1_last_got);
293 INSERT_SPECIAL_OP(plt);
294 INSERT_SPECIAL_OP (hw0_tls_gd);
295 INSERT_SPECIAL_OP (hw0_last_tls_gd);
296 INSERT_SPECIAL_OP (hw1_last_tls_gd);
297 INSERT_SPECIAL_OP (hw0_tls_ie);
298 INSERT_SPECIAL_OP (hw0_last_tls_ie);
299 INSERT_SPECIAL_OP (hw1_last_tls_ie);
300 INSERT_SPECIAL_OP (hw0_tls_le);
301 INSERT_SPECIAL_OP (hw0_last_tls_le);
302 INSERT_SPECIAL_OP (hw1_last_tls_le);
303 INSERT_SPECIAL_OP (tls_gd_call);
304 INSERT_SPECIAL_OP (tls_gd_add);
305 INSERT_SPECIAL_OP (tls_ie_load);
306 INSERT_SPECIAL_OP (tls_add);
307 INSERT_SPECIAL_OP (hw0_plt);
308 INSERT_SPECIAL_OP (hw1_plt);
309 INSERT_SPECIAL_OP (hw1_last_plt);
310 INSERT_SPECIAL_OP (hw2_last_plt);
311 #undef INSERT_SPECIAL_OP
312
313 /* Initialize op_hash hash table. */
314 op_hash = hash_new ();
315 for (op = &tilegx_opcodes[0]; op->name != NULL; op++)
316 {
317 const char *hash_err = hash_insert (op_hash, op->name, (void *)op);
318 if (hash_err != NULL)
319 as_fatal (_("Internal Error: Can't hash %s: %s"), op->name, hash_err);
320 }
321
322 /* Initialize the spr hash table. */
323 parsing_spr = 0;
324 spr_hash = hash_new ();
325 for (i = 0; i < tilegx_num_sprs; i++)
326 hash_insert (spr_hash, tilegx_sprs[i].name,
327 (void *) &tilegx_sprs[i]);
328
329 /* Set up the main_reg_hash table. We use this instead of
330 creating a symbol in the register section to avoid ambiguities
331 with labels that have the same names as registers. */
332 main_reg_hash = hash_new ();
333 for (i = 0; i < TILEGX_NUM_REGISTERS; i++)
334 {
335 char buf[64];
336
337 hash_insert (main_reg_hash, tilegx_register_names[i],
338 (void *) (long) (i | CANONICAL_REG_NAME_FLAG));
339
340 /* See if we should insert a noncanonical alias, like r63. */
341 sprintf (buf, "r%d", i);
342 if (strcmp (buf, tilegx_register_names[i]) != 0)
343 hash_insert (main_reg_hash, xstrdup (buf),
344 (void *) (long) (i | NONCANONICAL_REG_NAME_FLAG));
345 }
346 }
347
348 #define BUNDLE_TEMPLATE_MASK(p0, p1, p2) \
349 ((p0) | ((p1) << 8) | ((p2) << 16))
350 #define BUNDLE_TEMPLATE(p0, p1, p2) \
351 { { (p0), (p1), (p2) }, \
352 BUNDLE_TEMPLATE_MASK(1 << (p0), 1 << (p1), (1 << (p2))) \
353 }
354
355 #define NO_PIPELINE TILEGX_NUM_PIPELINE_ENCODINGS
356
357 struct bundle_template
358 {
359 tilegx_pipeline pipe[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];
360 unsigned int pipe_mask;
361 };
362
363 static const struct bundle_template bundle_templates[] =
364 {
365 /* In Y format we must always have something in Y2, since it has
366 no fnop, so this conveys that Y2 must always be used. */
367 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0, TILEGX_PIPELINE_Y2, NO_PIPELINE),
368 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1, TILEGX_PIPELINE_Y2, NO_PIPELINE),
369 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2, TILEGX_PIPELINE_Y0, NO_PIPELINE),
370 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2, TILEGX_PIPELINE_Y1, NO_PIPELINE),
371
372 /* Y format has three instructions. */
373 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y2),
374 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y1),
375 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y2),
376 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y0),
377 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y0,TILEGX_PIPELINE_Y1),
378 BUNDLE_TEMPLATE(TILEGX_PIPELINE_Y2,TILEGX_PIPELINE_Y1,TILEGX_PIPELINE_Y0),
379
380 /* X format has only two instructions. */
381 BUNDLE_TEMPLATE(TILEGX_PIPELINE_X0, TILEGX_PIPELINE_X1, NO_PIPELINE),
382 BUNDLE_TEMPLATE(TILEGX_PIPELINE_X1, TILEGX_PIPELINE_X0, NO_PIPELINE)
383 };
384
385
386 static void
prepend_nop_to_bundle(tilegx_mnemonic mnemonic)387 prepend_nop_to_bundle (tilegx_mnemonic mnemonic)
388 {
389 memmove (¤t_bundle[1], ¤t_bundle[0],
390 current_bundle_index * sizeof current_bundle[0]);
391 current_bundle[0].opcode = &tilegx_opcodes[mnemonic];
392 ++current_bundle_index;
393 }
394
395 static tilegx_bundle_bits
insert_operand(tilegx_bundle_bits bits,const struct tilegx_operand * operand,int operand_value,char * file,unsigned lineno)396 insert_operand (tilegx_bundle_bits bits,
397 const struct tilegx_operand *operand,
398 int operand_value,
399 char *file,
400 unsigned lineno)
401 {
402 /* Range-check the immediate. */
403 int num_bits = operand->num_bits;
404
405 operand_value >>= operand->rightshift;
406
407 if (bfd_check_overflow (operand->is_signed
408 ? complain_overflow_signed
409 : complain_overflow_unsigned,
410 num_bits,
411 0,
412 bfd_arch_bits_per_address (stdoutput),
413 operand_value)
414 != bfd_reloc_ok)
415 {
416 offsetT min, max;
417 if (operand->is_signed)
418 {
419 min = -(1 << (num_bits - 1));
420 max = (1 << (num_bits - 1)) - 1;
421 }
422 else
423 {
424 min = 0;
425 max = (1 << num_bits) - 1;
426 }
427 as_bad_value_out_of_range (_("operand"), operand_value, min, max,
428 file, lineno);
429 }
430
431 /* Write out the bits for the immediate. */
432 return bits | operand->insert (operand_value);
433 }
434
435
436 static int
apply_special_operator(operatorT op,offsetT num,char * file,unsigned lineno)437 apply_special_operator (operatorT op, offsetT num, char *file, unsigned lineno)
438 {
439 int ret;
440 int check_shift = -1;
441
442 switch (op)
443 {
444 case O_hw0_last:
445 check_shift = 0;
446 /* Fall through. */
447 case O_hw0:
448 ret = (signed short)num;
449 break;
450
451 case O_hw1_last:
452 check_shift = 16;
453 /* Fall through. */
454 case O_hw1:
455 ret = (signed short)(num >> 16);
456 break;
457
458 case O_hw2_last:
459 check_shift = 32;
460 /* Fall through. */
461 case O_hw2:
462 ret = (signed short)(num >> 32);
463 break;
464
465 case O_hw3:
466 ret = (signed short)(num >> 48);
467 break;
468
469 default:
470 abort ();
471 break;
472 }
473
474 if (check_shift >= 0 && ret != (num >> check_shift))
475 {
476 as_bad_value_out_of_range (_("operand"), num,
477 ~0ULL << (check_shift + 16 - 1),
478 ~0ULL >> (64 - (check_shift + 16 - 1)),
479 file, lineno);
480 }
481
482 return ret;
483 }
484
485 static tilegx_bundle_bits
emit_tilegx_instruction(tilegx_bundle_bits bits,int num_operands,const unsigned char * operands,expressionS * operand_values,char * bundle_start)486 emit_tilegx_instruction (tilegx_bundle_bits bits,
487 int num_operands,
488 const unsigned char *operands,
489 expressionS *operand_values,
490 char *bundle_start)
491 {
492 int i;
493
494 for (i = 0; i < num_operands; i++)
495 {
496 const struct tilegx_operand *operand =
497 &tilegx_operands[operands[i]];
498 expressionS *operand_exp = &operand_values[i];
499 int is_pc_relative = operand->is_pc_relative;
500
501 if (operand_exp->X_op == O_register
502 || (operand_exp->X_op == O_constant && !is_pc_relative))
503 {
504 /* We know what the bits are right now, so insert them. */
505 bits = insert_operand (bits, operand, operand_exp->X_add_number,
506 NULL, 0);
507 }
508 else
509 {
510 bfd_reloc_code_real_type reloc = operand->default_reloc;
511 expressionS subexp;
512 int die = 0, use_subexp = 0, require_symbol = 0;
513 fixS *fixP;
514
515 /* Take an expression like hw0(x) and turn it into x with
516 a different reloc type. */
517 switch (operand_exp->X_op)
518 {
519 #define HANDLE_OP16(suffix) \
520 switch (reloc) \
521 { \
522 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST: \
523 reloc = BFD_RELOC_TILEGX_IMM16_X0_##suffix; \
524 break; \
525 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST: \
526 reloc = BFD_RELOC_TILEGX_IMM16_X1_##suffix; \
527 break; \
528 default: \
529 die = 1; \
530 break; \
531 } \
532 use_subexp = 1
533
534 case O_hw0:
535 HANDLE_OP16 (HW0);
536 break;
537
538 case O_hw1:
539 HANDLE_OP16 (HW1);
540 break;
541
542 case O_hw2:
543 HANDLE_OP16 (HW2);
544 break;
545
546 case O_hw3:
547 HANDLE_OP16 (HW3);
548 break;
549
550 case O_hw0_last:
551 HANDLE_OP16 (HW0_LAST);
552 break;
553
554 case O_hw1_last:
555 HANDLE_OP16 (HW1_LAST);
556 break;
557
558 case O_hw2_last:
559 HANDLE_OP16 (HW2_LAST);
560 break;
561
562 case O_hw0_got:
563 HANDLE_OP16 (HW0_GOT);
564 require_symbol = 1;
565 break;
566
567 case O_hw0_last_got:
568 HANDLE_OP16 (HW0_LAST_GOT);
569 require_symbol = 1;
570 break;
571
572 case O_hw1_last_got:
573 HANDLE_OP16 (HW1_LAST_GOT);
574 require_symbol = 1;
575 break;
576
577 case O_hw0_tls_gd:
578 HANDLE_OP16 (HW0_TLS_GD);
579 require_symbol = 1;
580 break;
581
582 case O_hw0_last_tls_gd:
583 HANDLE_OP16 (HW0_LAST_TLS_GD);
584 require_symbol = 1;
585 break;
586
587 case O_hw1_last_tls_gd:
588 HANDLE_OP16 (HW1_LAST_TLS_GD);
589 require_symbol = 1;
590 break;
591
592 case O_hw0_tls_ie:
593 HANDLE_OP16 (HW0_TLS_IE);
594 require_symbol = 1;
595 break;
596
597 case O_hw0_last_tls_ie:
598 HANDLE_OP16 (HW0_LAST_TLS_IE);
599 require_symbol = 1;
600 break;
601
602 case O_hw1_last_tls_ie:
603 HANDLE_OP16 (HW1_LAST_TLS_IE);
604 require_symbol = 1;
605 break;
606
607 case O_hw0_tls_le:
608 HANDLE_OP16 (HW0_TLS_LE);
609 require_symbol = 1;
610 break;
611
612 case O_hw0_last_tls_le:
613 HANDLE_OP16 (HW0_LAST_TLS_LE);
614 require_symbol = 1;
615 break;
616
617 case O_hw1_last_tls_le:
618 HANDLE_OP16 (HW1_LAST_TLS_LE);
619 require_symbol = 1;
620 break;
621
622 case O_hw0_plt:
623 HANDLE_OP16 (HW0_PLT_PCREL);
624 break;
625
626 case O_hw1_plt:
627 HANDLE_OP16 (HW1_PLT_PCREL);
628 break;
629
630 case O_hw1_last_plt:
631 HANDLE_OP16 (HW1_LAST_PLT_PCREL);
632 break;
633
634 case O_hw2_last_plt:
635 HANDLE_OP16 (HW2_LAST_PLT_PCREL);
636 break;
637
638 #undef HANDLE_OP16
639
640 case O_plt:
641 switch (reloc)
642 {
643 case BFD_RELOC_TILEGX_JUMPOFF_X1:
644 reloc = BFD_RELOC_TILEGX_JUMPOFF_X1_PLT;
645 break;
646 default:
647 die = 1;
648 break;
649 }
650 use_subexp = 1;
651 require_symbol = 1;
652 break;
653
654 case O_tls_gd_call:
655 switch (reloc)
656 {
657 case BFD_RELOC_TILEGX_JUMPOFF_X1:
658 reloc = BFD_RELOC_TILEGX_TLS_GD_CALL;
659 break;
660 default:
661 die = 1;
662 break;
663 }
664 use_subexp = 1;
665 require_symbol = 1;
666 break;
667
668 case O_tls_gd_add:
669 switch (reloc)
670 {
671 case BFD_RELOC_TILEGX_IMM8_X0:
672 reloc = BFD_RELOC_TILEGX_IMM8_X0_TLS_GD_ADD;
673 break;
674 case BFD_RELOC_TILEGX_IMM8_X1:
675 reloc = BFD_RELOC_TILEGX_IMM8_X1_TLS_GD_ADD;
676 break;
677 case BFD_RELOC_TILEGX_IMM8_Y0:
678 reloc = BFD_RELOC_TILEGX_IMM8_Y0_TLS_GD_ADD;
679 break;
680 case BFD_RELOC_TILEGX_IMM8_Y1:
681 reloc = BFD_RELOC_TILEGX_IMM8_Y1_TLS_GD_ADD;
682 break;
683 default:
684 die = 1;
685 break;
686 }
687 use_subexp = 1;
688 require_symbol = 1;
689 break;
690
691 case O_tls_ie_load:
692 switch (reloc)
693 {
694 case BFD_RELOC_TILEGX_IMM8_X1:
695 reloc = BFD_RELOC_TILEGX_TLS_IE_LOAD;
696 break;
697 default:
698 die = 1;
699 break;
700 }
701 use_subexp = 1;
702 require_symbol = 1;
703 break;
704
705 case O_tls_add:
706 switch (reloc)
707 {
708 case BFD_RELOC_TILEGX_IMM8_X0:
709 reloc = BFD_RELOC_TILEGX_IMM8_X0_TLS_ADD;
710 break;
711 case BFD_RELOC_TILEGX_IMM8_X1:
712 reloc = BFD_RELOC_TILEGX_IMM8_X1_TLS_ADD;
713 break;
714 case BFD_RELOC_TILEGX_IMM8_Y0:
715 reloc = BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD;
716 break;
717 case BFD_RELOC_TILEGX_IMM8_Y1:
718 reloc = BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD;
719 break;
720 default:
721 die = 1;
722 break;
723 }
724 use_subexp = 1;
725 require_symbol = 1;
726 break;
727
728 default:
729 /* Do nothing. */
730 break;
731 }
732
733 if (die)
734 {
735 as_bad (_("Invalid operator for operand."));
736 }
737 else if (use_subexp)
738 {
739 /* Now that we've changed the reloc, change ha16(x) into x,
740 etc. */
741
742 if (!operand_exp->X_add_symbol->sy_flags.sy_local_symbol
743 && operand_exp->X_add_symbol->sy_value.X_md)
744 {
745 /* HACK: We used X_md to mark this symbol as a fake wrapper
746 around a real expression. To unwrap it, we just grab its
747 value here. */
748 operand_exp = &operand_exp->X_add_symbol->sy_value;
749
750 if (require_symbol)
751 {
752 /* Look at the expression, and reject it if it's not a
753 plain symbol. */
754 if (operand_exp->X_op != O_symbol
755 || operand_exp->X_add_number != 0)
756 as_bad (_("Operator may only be applied to symbols."));
757 }
758 }
759 else
760 {
761 /* The value of this expression is an actual symbol, so
762 turn that into an expression. */
763 memset (&subexp, 0, sizeof subexp);
764 subexp.X_op = O_symbol;
765 subexp.X_add_symbol = operand_exp->X_add_symbol;
766 operand_exp = &subexp;
767 }
768 }
769
770 /* Create a fixup to handle this later. */
771 fixP = fix_new_exp (frag_now,
772 bundle_start - frag_now->fr_literal,
773 (operand->num_bits + 7) >> 3,
774 operand_exp,
775 is_pc_relative,
776 reloc);
777 fixP->tc_fix_data = operand;
778
779 /* Don't do overflow checking if we are applying a function like
780 ha16. */
781 fixP->fx_no_overflow |= use_subexp;
782 }
783 }
784 return bits;
785 }
786
787
788 /* Detects and complains if two instructions in current_bundle write
789 to the same register, either implicitly or explicitly, or if a
790 read-only register is written. */
791 static void
check_illegal_reg_writes(void)792 check_illegal_reg_writes (void)
793 {
794 BFD_HOST_U_64_BIT all_regs_written = 0;
795 int j;
796
797 for (j = 0; j < current_bundle_index; j++)
798 {
799 const struct tilegx_instruction *instr = ¤t_bundle[j];
800 int k;
801 BFD_HOST_U_64_BIT regs =
802 ((BFD_HOST_U_64_BIT)1) << instr->opcode->implicitly_written_register;
803 BFD_HOST_U_64_BIT conflict;
804
805 for (k = 0; k < instr->opcode->num_operands; k++)
806 {
807 const struct tilegx_operand *operand =
808 &tilegx_operands[instr->opcode->operands[instr->pipe][k]];
809
810 if (operand->is_dest_reg)
811 {
812 int regno = instr->operand_values[k].X_add_number;
813 BFD_HOST_U_64_BIT mask = ((BFD_HOST_U_64_BIT)1) << regno;
814
815 if ((mask & ( (((BFD_HOST_U_64_BIT)1) << TREG_IDN1)
816 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN1)
817 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN2)
818 | (((BFD_HOST_U_64_BIT)1) << TREG_UDN3))) != 0
819 && !allow_suspicious_bundles)
820 {
821 as_bad (_("Writes to register '%s' are not allowed."),
822 tilegx_register_names[regno]);
823 }
824
825 regs |= mask;
826 }
827 }
828
829 /* Writing to the zero register doesn't count. */
830 regs &= ~(((BFD_HOST_U_64_BIT)1) << TREG_ZERO);
831
832 conflict = all_regs_written & regs;
833 if (conflict != 0 && !allow_suspicious_bundles)
834 {
835 /* Find which register caused the conflict. */
836 const char *conflicting_reg_name = "???";
837 int i;
838
839 for (i = 0; i < TILEGX_NUM_REGISTERS; i++)
840 {
841 if (((conflict >> i) & 1) != 0)
842 {
843 conflicting_reg_name = tilegx_register_names[i];
844 break;
845 }
846 }
847
848 as_bad (_("Two instructions in the same bundle both write "
849 "to register %s, which is not allowed."),
850 conflicting_reg_name);
851 }
852
853 all_regs_written |= regs;
854 }
855 }
856
857
858 static void
tilegx_flush_bundle(void)859 tilegx_flush_bundle (void)
860 {
861 unsigned i;
862 int j;
863 addressT addr_mod;
864 unsigned compatible_pipes;
865 const struct bundle_template *match;
866 char *f;
867
868 inside_bundle = 0;
869
870 switch (current_bundle_index)
871 {
872 case 0:
873 /* No instructions. */
874 return;
875 case 1:
876 if (current_bundle[0].opcode->can_bundle)
877 {
878 /* Simplify later logic by adding an explicit fnop. */
879 prepend_nop_to_bundle (TILEGX_OPC_FNOP);
880 }
881 else
882 {
883 /* This instruction cannot be bundled with anything else.
884 Prepend an explicit 'nop', rather than an 'fnop', because
885 fnops can be replaced by later binary-processing tools while
886 nops cannot. */
887 prepend_nop_to_bundle (TILEGX_OPC_NOP);
888 }
889 break;
890 default:
891 if (!allow_suspicious_bundles)
892 {
893 /* Make sure all instructions can be bundled with other
894 instructions. */
895 const struct tilegx_opcode *cannot_bundle = NULL;
896 bfd_boolean seen_non_nop = FALSE;
897
898 for (j = 0; j < current_bundle_index; j++)
899 {
900 const struct tilegx_opcode *op = current_bundle[j].opcode;
901
902 if (!op->can_bundle && cannot_bundle == NULL)
903 cannot_bundle = op;
904 else if (op->mnemonic != TILEGX_OPC_NOP
905 && op->mnemonic != TILEGX_OPC_INFO
906 && op->mnemonic != TILEGX_OPC_INFOL)
907 seen_non_nop = TRUE;
908 }
909
910 if (cannot_bundle != NULL && seen_non_nop)
911 {
912 current_bundle_index = 0;
913 as_bad (_("'%s' may not be bundled with other instructions."),
914 cannot_bundle->name);
915 return;
916 }
917 }
918 break;
919 }
920
921 compatible_pipes =
922 BUNDLE_TEMPLATE_MASK(current_bundle[0].opcode->pipes,
923 current_bundle[1].opcode->pipes,
924 (current_bundle_index == 3
925 ? current_bundle[2].opcode->pipes
926 : (1 << NO_PIPELINE)));
927
928 /* Find a template that works, if any. */
929 match = NULL;
930 for (i = 0; i < sizeof bundle_templates / sizeof bundle_templates[0]; i++)
931 {
932 const struct bundle_template *b = &bundle_templates[i];
933 if ((b->pipe_mask & compatible_pipes) == b->pipe_mask)
934 {
935 match = b;
936 break;
937 }
938 }
939
940 if (match == NULL)
941 {
942 current_bundle_index = 0;
943 as_bad (_("Invalid combination of instructions for bundle."));
944 return;
945 }
946
947 /* If the section seems to have no alignment set yet, go ahead and
948 make it large enough to hold code. */
949 if (bfd_get_section_alignment (stdoutput, now_seg) == 0)
950 bfd_set_section_alignment (stdoutput, now_seg,
951 TILEGX_LOG2_BUNDLE_ALIGNMENT_IN_BYTES);
952
953 for (j = 0; j < current_bundle_index; j++)
954 current_bundle[j].pipe = match->pipe[j];
955
956 if (current_bundle_index == 2 && !tilegx_is_x_pipeline (match->pipe[0]))
957 {
958 /* We are in Y mode with only two instructions, so add an FNOP. */
959 prepend_nop_to_bundle (TILEGX_OPC_FNOP);
960
961 /* Figure out what pipe the fnop must be in via arithmetic.
962 * p0 + p1 + p2 must sum to the sum of TILEGX_PIPELINE_Y[012]. */
963 current_bundle[0].pipe =
964 (tilegx_pipeline)((TILEGX_PIPELINE_Y0
965 + TILEGX_PIPELINE_Y1
966 + TILEGX_PIPELINE_Y2) -
967 (current_bundle[1].pipe + current_bundle[2].pipe));
968 }
969
970 check_illegal_reg_writes ();
971
972 f = frag_more (TILEGX_BUNDLE_SIZE_IN_BYTES);
973
974 /* Check to see if this bundle is at an offset that is a multiple of 8-bytes
975 from the start of the frag. */
976 addr_mod = frag_now_fix () & (TILEGX_BUNDLE_ALIGNMENT_IN_BYTES - 1);
977 if (frag_now->has_code && frag_now->insn_addr != addr_mod)
978 as_bad (_("instruction address is not a multiple of 8"));
979 frag_now->insn_addr = addr_mod;
980 frag_now->has_code = 1;
981
982 tilegx_bundle_bits bits = 0;
983 for (j = 0; j < current_bundle_index; j++)
984 {
985 struct tilegx_instruction *instr = ¤t_bundle[j];
986 tilegx_pipeline pipeline = instr->pipe;
987 const struct tilegx_opcode *opcode = instr->opcode;
988
989 bits |= emit_tilegx_instruction (opcode->fixed_bit_values[pipeline],
990 opcode->num_operands,
991 &opcode->operands[pipeline][0],
992 instr->operand_values,
993 f);
994 }
995
996 number_to_chars_littleendian (f, bits, 8);
997 current_bundle_index = 0;
998
999 /* Emit DWARF2 debugging information. */
1000 dwarf2_emit_insn (TILEGX_BUNDLE_SIZE_IN_BYTES);
1001 }
1002
1003
1004 /* Extend the expression parser to handle hw0(label), etc.
1005 as well as SPR names when in the context of parsing an SPR. */
1006
1007 int
tilegx_parse_name(char * name,expressionS * e,char * nextcharP)1008 tilegx_parse_name (char *name, expressionS *e, char *nextcharP)
1009 {
1010 operatorT op = O_illegal;
1011
1012 if (parsing_spr)
1013 {
1014 void* val = hash_find (spr_hash, name);
1015 if (val == NULL)
1016 return 0;
1017
1018 memset (e, 0, sizeof *e);
1019 e->X_op = O_constant;
1020 e->X_add_number = ((const struct tilegx_spr *)val)->number;
1021 return 1;
1022 }
1023
1024 if (*nextcharP != '(')
1025 {
1026 /* hw0, etc. not followed by a paren is just a label with that name. */
1027 return 0;
1028 }
1029 else
1030 {
1031 /* Look up the operator in our table. */
1032 void* val = hash_find (special_operator_hash, name);
1033 if (val == 0)
1034 return 0;
1035 op = (operatorT)(long)val;
1036 }
1037
1038 /* Restore old '(' and skip it. */
1039 *input_line_pointer = '(';
1040 ++input_line_pointer;
1041
1042 expression (e);
1043
1044 if (*input_line_pointer != ')')
1045 {
1046 as_bad (_("Missing ')'"));
1047 *nextcharP = *input_line_pointer;
1048 return 0;
1049 }
1050 /* Skip ')'. */
1051 ++input_line_pointer;
1052
1053 if (e->X_op == O_register || e->X_op == O_absent)
1054 {
1055 as_bad (_("Invalid expression."));
1056 e->X_op = O_constant;
1057 e->X_add_number = 0;
1058 }
1059 else
1060 {
1061 /* Wrap subexpression with a unary operator. */
1062 symbolS *sym = make_expr_symbol (e);
1063
1064 if (sym != e->X_add_symbol)
1065 {
1066 /* HACK: mark this symbol as a temporary wrapper around a proper
1067 expression, so we can unwrap it later once we have communicated
1068 the relocation type. */
1069 sym->sy_value.X_md = 1;
1070 }
1071
1072 memset (e, 0, sizeof *e);
1073 e->X_op = op;
1074 e->X_add_symbol = sym;
1075 e->X_add_number = 0;
1076 }
1077
1078 *nextcharP = *input_line_pointer;
1079 return 1;
1080 }
1081
1082
1083 /* Parses an expression which must be a register name. */
1084
1085 static void
parse_reg_expression(expressionS * expression)1086 parse_reg_expression (expressionS* expression)
1087 {
1088 /* Zero everything to make sure we don't miss any flags. */
1089 memset (expression, 0, sizeof *expression);
1090
1091 char* regname = input_line_pointer;
1092 char terminating_char = get_symbol_end ();
1093
1094 void* pval = hash_find (main_reg_hash, regname);
1095
1096 if (pval == NULL)
1097 {
1098 as_bad (_("Expected register, got '%s'."), regname);
1099 }
1100
1101 int regno_and_flags = (int)(size_t)pval;
1102 int regno = EXTRACT_REGNO(regno_and_flags);
1103
1104 if ((regno_and_flags & NONCANONICAL_REG_NAME_FLAG)
1105 && require_canonical_reg_names)
1106 {
1107 as_warn (_("Found use of non-canonical register name %s; "
1108 "use %s instead."),
1109 regname,
1110 tilegx_register_names[regno]);
1111 }
1112
1113 /* Restore the old character following the register name. */
1114 *input_line_pointer = terminating_char;
1115
1116 /* Fill in the expression fields to indicate it's a register. */
1117 expression->X_op = O_register;
1118 expression->X_add_number = regno;
1119 }
1120
1121
1122 /* Parses and type-checks comma-separated operands in input_line_pointer. */
1123
1124 static void
parse_operands(const char * opcode_name,const unsigned char * operands,int num_operands,expressionS * operand_values)1125 parse_operands (const char *opcode_name,
1126 const unsigned char *operands,
1127 int num_operands,
1128 expressionS *operand_values)
1129 {
1130 int i;
1131
1132 memset (operand_values, 0, num_operands * sizeof operand_values[0]);
1133
1134 SKIP_WHITESPACE ();
1135 for (i = 0; i < num_operands; i++)
1136 {
1137 tilegx_operand_type type = tilegx_operands[operands[i]].type;
1138
1139 SKIP_WHITESPACE ();
1140
1141 if (type == TILEGX_OP_TYPE_REGISTER)
1142 {
1143 parse_reg_expression (&operand_values[i]);
1144 }
1145 else if (*input_line_pointer == '}')
1146 {
1147 operand_values[i].X_op = O_absent;
1148 }
1149 else if (type == TILEGX_OP_TYPE_SPR)
1150 {
1151 /* Modify the expression parser to add SPRs to the namespace. */
1152 parsing_spr = 1;
1153 expression (&operand_values[i]);
1154 parsing_spr = 0;
1155 }
1156 else
1157 {
1158 expression (&operand_values[i]);
1159 }
1160
1161 SKIP_WHITESPACE ();
1162
1163 if (i + 1 < num_operands)
1164 {
1165 int separator = (unsigned char)*input_line_pointer++;
1166
1167 if (is_end_of_line[separator] || (separator == '}'))
1168 {
1169 as_bad (_("Too few operands to '%s'."), opcode_name);
1170 return;
1171 }
1172 else if (separator != ',')
1173 {
1174 as_bad (_("Unexpected character '%c' after operand %d to %s."),
1175 (char)separator, i + 1, opcode_name);
1176 return;
1177 }
1178 }
1179
1180 /* Arbitrarily use the first valid pipe to get the operand type,
1181 since they are all the same. */
1182 switch (tilegx_operands[operands[i]].type)
1183 {
1184 case TILEGX_OP_TYPE_REGISTER:
1185 /* Handled in parse_reg_expression already. */
1186 break;
1187 case TILEGX_OP_TYPE_SPR:
1188 /* Fall through */
1189 case TILEGX_OP_TYPE_IMMEDIATE:
1190 /* Fall through */
1191 case TILEGX_OP_TYPE_ADDRESS:
1192 if ( operand_values[i].X_op == O_register
1193 || operand_values[i].X_op == O_illegal
1194 || operand_values[i].X_op == O_absent)
1195 as_bad (_("Expected immediate expression"));
1196 break;
1197 default:
1198 abort();
1199 }
1200 }
1201
1202 if (!is_end_of_line[(unsigned char)*input_line_pointer])
1203 {
1204 switch (*input_line_pointer)
1205 {
1206 case '}':
1207 if (!inside_bundle)
1208 as_bad (_("Found '}' when not bundling."));
1209 ++input_line_pointer;
1210 inside_bundle = 0;
1211 demand_empty_rest_of_line ();
1212 break;
1213
1214 case ',':
1215 as_bad (_("Too many operands"));
1216 break;
1217
1218 default:
1219 /* Use default error for unrecognized garbage. */
1220 demand_empty_rest_of_line ();
1221 break;
1222 }
1223 }
1224 }
1225
1226
1227 /* This is the guts of the machine-dependent assembler. STR points to a
1228 machine dependent instruction. This function is supposed to emit the
1229 frags/bytes it assembles to. */
1230
1231 void
md_assemble(char * str)1232 md_assemble (char *str)
1233 {
1234 char old_char;
1235 size_t opname_len;
1236 char *old_input_line_pointer;
1237 const struct tilegx_opcode *op;
1238 int first_pipe;
1239
1240 /* Split off the opcode and look it up. */
1241 opname_len = strcspn (str, " {}");
1242 old_char = str[opname_len];
1243 str[opname_len] = '\0';
1244
1245 op = hash_find(op_hash, str);
1246 str[opname_len] = old_char;
1247 if (op == NULL)
1248 {
1249 as_bad (_("Unknown opcode `%.*s'."), (int)opname_len, str);
1250 return;
1251 }
1252
1253 /* Prepare to parse the operands. */
1254 old_input_line_pointer = input_line_pointer;
1255 input_line_pointer = str + opname_len;
1256 SKIP_WHITESPACE ();
1257
1258 if (current_bundle_index == TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE)
1259 {
1260 as_bad (_("Too many instructions for bundle."));
1261 tilegx_flush_bundle ();
1262 }
1263
1264 /* Make sure we have room for the upcoming bundle before we
1265 create any fixups. Otherwise if we have to switch to a new
1266 frag the fixup dot_value fields will be wrong. */
1267 frag_grow (TILEGX_BUNDLE_SIZE_IN_BYTES);
1268
1269 /* Find a valid pipe for this opcode. */
1270 for (first_pipe = 0; (op->pipes & (1 << first_pipe)) == 0; first_pipe++)
1271 ;
1272
1273 /* Call the function that assembles this instruction. */
1274 current_bundle[current_bundle_index].opcode = op;
1275 parse_operands (op->name,
1276 &op->operands[first_pipe][0],
1277 op->num_operands,
1278 current_bundle[current_bundle_index].operand_values);
1279 ++current_bundle_index;
1280
1281 /* Restore the saved value of input_line_pointer. */
1282 input_line_pointer = old_input_line_pointer;
1283
1284 /* If we weren't inside curly braces, go ahead and emit
1285 this lone instruction as a bundle right now. */
1286 if (!inside_bundle)
1287 tilegx_flush_bundle ();
1288 }
1289
1290
1291 static void
s_require_canonical_reg_names(int require)1292 s_require_canonical_reg_names (int require)
1293 {
1294 demand_empty_rest_of_line ();
1295 require_canonical_reg_names = require;
1296 }
1297
1298 static void
s_allow_suspicious_bundles(int allow)1299 s_allow_suspicious_bundles (int allow)
1300 {
1301 demand_empty_rest_of_line ();
1302 allow_suspicious_bundles = allow;
1303 }
1304
1305 const pseudo_typeS md_pseudo_table[] =
1306 {
1307 {"align", s_align_bytes, 0}, /* Defaulting is invalid (0). */
1308 {"word", cons, 4},
1309 {"require_canonical_reg_names", s_require_canonical_reg_names, 1 },
1310 {"no_require_canonical_reg_names", s_require_canonical_reg_names, 0 },
1311 {"allow_suspicious_bundles", s_allow_suspicious_bundles, 1 },
1312 {"no_allow_suspicious_bundles", s_allow_suspicious_bundles, 0 },
1313 { NULL, 0, 0 }
1314 };
1315
1316 /* Equal to MAX_PRECISION in atof-ieee.c */
1317 #define MAX_LITTLENUMS 6
1318
1319 void
md_number_to_chars(char * buf,valueT val,int n)1320 md_number_to_chars (char * buf, valueT val, int n)
1321 {
1322 if (target_big_endian)
1323 number_to_chars_bigendian (buf, val, n);
1324 else
1325 number_to_chars_littleendian (buf, val, n);
1326 }
1327
1328 /* Turn the string pointed to by litP into a floating point constant
1329 of type TYPE, and emit the appropriate bytes. The number of
1330 LITTLENUMS emitted is stored in *SIZEP. An error message is
1331 returned, or NULL on OK. */
1332
1333 char *
md_atof(int type,char * litP,int * sizeP)1334 md_atof (int type, char *litP, int *sizeP)
1335 {
1336 int prec;
1337 LITTLENUM_TYPE words[MAX_LITTLENUMS];
1338 LITTLENUM_TYPE *wordP;
1339 char *t;
1340
1341 switch (type)
1342 {
1343 case 'f':
1344 case 'F':
1345 prec = 2;
1346 break;
1347
1348 case 'd':
1349 case 'D':
1350 prec = 4;
1351 break;
1352
1353 default:
1354 *sizeP = 0;
1355 return _("Bad call to md_atof ()");
1356 }
1357 t = atof_ieee (input_line_pointer, type, words);
1358 if (t)
1359 input_line_pointer = t;
1360
1361 *sizeP = prec * sizeof (LITTLENUM_TYPE);
1362 /* This loops outputs the LITTLENUMs in REVERSE order; in accord with
1363 the bigendian 386. */
1364 for (wordP = words + prec - 1; prec--;)
1365 {
1366 md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
1367 litP += sizeof (LITTLENUM_TYPE);
1368 }
1369 return 0;
1370 }
1371
1372
1373 /* We have no need to default values of symbols. */
1374
1375 symbolS *
md_undefined_symbol(char * name ATTRIBUTE_UNUSED)1376 md_undefined_symbol (char *name ATTRIBUTE_UNUSED)
1377 {
1378 return NULL;
1379 }
1380
1381
1382 void
tilegx_cons_fix_new(fragS * frag,int where,int nbytes,expressionS * exp)1383 tilegx_cons_fix_new (fragS *frag,
1384 int where,
1385 int nbytes,
1386 expressionS *exp)
1387 {
1388 expressionS subexp;
1389 bfd_reloc_code_real_type reloc = BFD_RELOC_NONE;
1390 int no_overflow = 0;
1391 fixS *fixP;
1392
1393 /* See if it's one of our special functions. */
1394 switch (exp->X_op)
1395 {
1396 case O_hw0:
1397 reloc = BFD_RELOC_TILEGX_HW0;
1398 no_overflow = 1;
1399 break;
1400 case O_hw1:
1401 reloc = BFD_RELOC_TILEGX_HW1;
1402 no_overflow = 1;
1403 break;
1404 case O_hw2:
1405 reloc = BFD_RELOC_TILEGX_HW2;
1406 no_overflow = 1;
1407 break;
1408 case O_hw3:
1409 reloc = BFD_RELOC_TILEGX_HW3;
1410 no_overflow = 1;
1411 break;
1412 case O_hw0_last:
1413 reloc = BFD_RELOC_TILEGX_HW0_LAST;
1414 break;
1415 case O_hw1_last:
1416 reloc = BFD_RELOC_TILEGX_HW1_LAST;
1417 break;
1418 case O_hw2_last:
1419 reloc = BFD_RELOC_TILEGX_HW2_LAST;
1420 break;
1421
1422 default:
1423 /* Do nothing. */
1424 break;
1425 }
1426
1427 if (reloc != BFD_RELOC_NONE)
1428 {
1429 if (nbytes != 2)
1430 {
1431 as_bad (_("This operator only produces two byte values."));
1432 nbytes = 2;
1433 }
1434
1435 memset (&subexp, 0, sizeof subexp);
1436 subexp.X_op = O_symbol;
1437 subexp.X_add_symbol = exp->X_add_symbol;
1438 exp = &subexp;
1439 }
1440 else
1441 {
1442 switch (nbytes)
1443 {
1444 case 1:
1445 reloc = BFD_RELOC_8;
1446 break;
1447 case 2:
1448 reloc = BFD_RELOC_16;
1449 break;
1450 case 4:
1451 reloc = BFD_RELOC_32;
1452 break;
1453 case 8:
1454 reloc = BFD_RELOC_64;
1455 break;
1456 default:
1457 as_bad (_("unsupported BFD relocation size %d"), nbytes);
1458 reloc = BFD_RELOC_64;
1459 break;
1460 }
1461 }
1462
1463 fixP = fix_new_exp (frag, where, nbytes, exp, 0, reloc);
1464 fixP->tc_fix_data = NULL;
1465 fixP->fx_no_overflow |= no_overflow;
1466 }
1467
1468
1469 void
md_apply_fix(fixS * fixP,valueT * valP,segT seg ATTRIBUTE_UNUSED)1470 md_apply_fix (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED)
1471 {
1472 const struct tilegx_operand *operand;
1473 valueT value = *valP;
1474 operatorT special;
1475 char *p;
1476
1477 /* Leave these for the linker. */
1478 if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
1479 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
1480 return;
1481
1482 if (fixP->fx_subsy != (symbolS *) NULL)
1483 {
1484 /* We can't actually support subtracting a symbol. */
1485 as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex"));
1486 }
1487
1488 /* Correct relocation types for pc-relativeness. */
1489 switch (fixP->fx_r_type)
1490 {
1491 #define FIX_PCREL(rtype) \
1492 case rtype: \
1493 if (fixP->fx_pcrel) \
1494 fixP->fx_r_type = rtype##_PCREL; \
1495 break; \
1496 \
1497 case rtype##_PCREL: \
1498 if (!fixP->fx_pcrel) \
1499 fixP->fx_r_type = rtype; \
1500 break
1501
1502 #define FIX_PLT_PCREL(rtype) \
1503 case rtype##_PLT_PCREL: \
1504 if (!fixP->fx_pcrel) \
1505 fixP->fx_r_type = rtype; \
1506 \
1507 break;
1508
1509 FIX_PCREL (BFD_RELOC_8);
1510 FIX_PCREL (BFD_RELOC_16);
1511 FIX_PCREL (BFD_RELOC_32);
1512 FIX_PCREL (BFD_RELOC_64);
1513 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0);
1514 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0);
1515 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1);
1516 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1);
1517 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2);
1518 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2);
1519 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW3);
1520 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW3);
1521 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST);
1522 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST);
1523 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST);
1524 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST);
1525 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST);
1526 FIX_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST);
1527 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW0);
1528 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW0);
1529 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1);
1530 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1);
1531 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST);
1532 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST);
1533 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST);
1534 FIX_PLT_PCREL (BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST);
1535
1536 #undef FIX_PCREL
1537
1538 default:
1539 /* Do nothing */
1540 break;
1541 }
1542
1543 if (fixP->fx_addsy != NULL)
1544 {
1545 #ifdef OBJ_ELF
1546 switch (fixP->fx_r_type)
1547 {
1548 case BFD_RELOC_TILEGX_IMM8_X0_TLS_ADD:
1549 case BFD_RELOC_TILEGX_IMM8_X1_TLS_ADD:
1550 case BFD_RELOC_TILEGX_IMM8_Y0_TLS_ADD:
1551 case BFD_RELOC_TILEGX_IMM8_Y1_TLS_ADD:
1552 case BFD_RELOC_TILEGX_IMM8_X0_TLS_GD_ADD:
1553 case BFD_RELOC_TILEGX_IMM8_X1_TLS_GD_ADD:
1554 case BFD_RELOC_TILEGX_IMM8_Y0_TLS_GD_ADD:
1555 case BFD_RELOC_TILEGX_IMM8_Y1_TLS_GD_ADD:
1556 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_GD:
1557 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_GD:
1558 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_GD:
1559 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_GD:
1560 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_GD:
1561 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_GD:
1562 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_IE:
1563 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_IE:
1564 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_IE:
1565 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_IE:
1566 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_IE:
1567 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_IE:
1568 case BFD_RELOC_TILEGX_IMM16_X0_HW0_TLS_LE:
1569 case BFD_RELOC_TILEGX_IMM16_X1_HW0_TLS_LE:
1570 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_TLS_LE:
1571 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_TLS_LE:
1572 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_TLS_LE:
1573 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_TLS_LE:
1574 case BFD_RELOC_TILEGX_TLS_GD_CALL:
1575 case BFD_RELOC_TILEGX_TLS_IE_LOAD:
1576 case BFD_RELOC_TILEGX_TLS_DTPMOD64:
1577 case BFD_RELOC_TILEGX_TLS_DTPOFF64:
1578 case BFD_RELOC_TILEGX_TLS_TPOFF64:
1579 case BFD_RELOC_TILEGX_TLS_DTPMOD32:
1580 case BFD_RELOC_TILEGX_TLS_DTPOFF32:
1581 case BFD_RELOC_TILEGX_TLS_TPOFF32:
1582 S_SET_THREAD_LOCAL (fixP->fx_addsy);
1583 break;
1584
1585 default:
1586 /* Do nothing */
1587 break;
1588 }
1589 #endif
1590 return;
1591 }
1592
1593 /* Apply hw0, etc. */
1594 special = O_illegal;
1595 switch (fixP->fx_r_type)
1596 {
1597 case BFD_RELOC_TILEGX_HW0:
1598 case BFD_RELOC_TILEGX_IMM16_X0_HW0:
1599 case BFD_RELOC_TILEGX_IMM16_X1_HW0:
1600 case BFD_RELOC_TILEGX_IMM16_X0_HW0_PCREL:
1601 case BFD_RELOC_TILEGX_IMM16_X1_HW0_PCREL:
1602 case BFD_RELOC_TILEGX_IMM16_X0_HW0_PLT_PCREL:
1603 case BFD_RELOC_TILEGX_IMM16_X1_HW0_PLT_PCREL:
1604 special = O_hw0;
1605 break;
1606
1607 case BFD_RELOC_TILEGX_HW0_LAST:
1608 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST:
1609 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST:
1610 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PCREL:
1611 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PCREL:
1612 case BFD_RELOC_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL:
1613 case BFD_RELOC_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL:
1614 special = O_hw0_last;
1615 break;
1616
1617 case BFD_RELOC_TILEGX_HW1:
1618 case BFD_RELOC_TILEGX_IMM16_X0_HW1:
1619 case BFD_RELOC_TILEGX_IMM16_X1_HW1:
1620 case BFD_RELOC_TILEGX_IMM16_X0_HW1_PCREL:
1621 case BFD_RELOC_TILEGX_IMM16_X1_HW1_PCREL:
1622 case BFD_RELOC_TILEGX_IMM16_X0_HW1_PLT_PCREL:
1623 case BFD_RELOC_TILEGX_IMM16_X1_HW1_PLT_PCREL:
1624 special = O_hw1;
1625 break;
1626
1627 case BFD_RELOC_TILEGX_HW1_LAST:
1628 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST:
1629 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST:
1630 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PCREL:
1631 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PCREL:
1632 case BFD_RELOC_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL:
1633 case BFD_RELOC_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL:
1634 special = O_hw1_last;
1635 break;
1636
1637 case BFD_RELOC_TILEGX_HW2:
1638 case BFD_RELOC_TILEGX_IMM16_X0_HW2:
1639 case BFD_RELOC_TILEGX_IMM16_X1_HW2:
1640 case BFD_RELOC_TILEGX_IMM16_X0_HW2_PCREL:
1641 case BFD_RELOC_TILEGX_IMM16_X1_HW2_PCREL:
1642 case BFD_RELOC_TILEGX_IMM16_X0_HW2_PLT_PCREL:
1643 case BFD_RELOC_TILEGX_IMM16_X1_HW2_PLT_PCREL:
1644 special = O_hw2;
1645 break;
1646
1647 case BFD_RELOC_TILEGX_HW2_LAST:
1648 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST:
1649 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST:
1650 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PCREL:
1651 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PCREL:
1652 case BFD_RELOC_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL:
1653 case BFD_RELOC_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL:
1654 special = O_hw2_last;
1655 break;
1656
1657 case BFD_RELOC_TILEGX_HW3:
1658 case BFD_RELOC_TILEGX_IMM16_X0_HW3:
1659 case BFD_RELOC_TILEGX_IMM16_X1_HW3:
1660 case BFD_RELOC_TILEGX_IMM16_X0_HW3_PCREL:
1661 case BFD_RELOC_TILEGX_IMM16_X1_HW3_PCREL:
1662 case BFD_RELOC_TILEGX_IMM16_X0_HW3_PLT_PCREL:
1663 case BFD_RELOC_TILEGX_IMM16_X1_HW3_PLT_PCREL:
1664 special = O_hw3;
1665 break;
1666
1667 default:
1668 /* Do nothing */
1669 break;
1670 }
1671
1672 if (special != O_illegal)
1673 {
1674 *valP = value = apply_special_operator (special, value,
1675 fixP->fx_file, fixP->fx_line);
1676 }
1677
1678 p = fixP->fx_frag->fr_literal + fixP->fx_where;
1679
1680 operand = fixP->tc_fix_data;
1681 if (operand != NULL)
1682 {
1683 /* It's an instruction operand. */
1684 tilegx_bundle_bits bits =
1685 insert_operand (0, operand, value, fixP->fx_file, fixP->fx_line);
1686
1687 /* Note that we might either be writing out bits for a bundle
1688 or a static network instruction, which are different sizes, so it's
1689 important to stop touching memory once we run out of bits.
1690 ORing in values is OK since we know the existing bits for
1691 this operand are zero. */
1692 for (; bits != 0; bits >>= 8)
1693 *p++ |= (char)bits;
1694 }
1695 else
1696 {
1697 /* Some other kind of relocation. */
1698 switch (fixP->fx_r_type)
1699 {
1700 case BFD_RELOC_8:
1701 case BFD_RELOC_8_PCREL:
1702 md_number_to_chars (p, value, 1);
1703 break;
1704
1705 case BFD_RELOC_16:
1706 case BFD_RELOC_16_PCREL:
1707 md_number_to_chars (p, value, 2);
1708 break;
1709
1710 case BFD_RELOC_32:
1711 case BFD_RELOC_32_PCREL:
1712 md_number_to_chars (p, value, 4);
1713 break;
1714
1715 case BFD_RELOC_64:
1716 case BFD_RELOC_64_PCREL:
1717 md_number_to_chars (p, value, 8);
1718 break;
1719
1720 default:
1721 /* Leave it for the linker. */
1722 return;
1723 }
1724 }
1725
1726 fixP->fx_done = 1;
1727 }
1728
1729
1730 /* Generate the BFD reloc to be stuck in the object file from the
1731 fixup used internally in the assembler. */
1732
1733 arelent *
tc_gen_reloc(asection * sec ATTRIBUTE_UNUSED,fixS * fixp)1734 tc_gen_reloc (asection *sec ATTRIBUTE_UNUSED, fixS *fixp)
1735 {
1736 arelent *reloc;
1737
1738 reloc = (arelent *) xmalloc (sizeof (arelent));
1739 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
1740 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
1741 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
1742
1743 /* Make sure none of our internal relocations make it this far.
1744 They'd better have been fully resolved by this point. */
1745 gas_assert ((int) fixp->fx_r_type > 0);
1746
1747 reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
1748 if (reloc->howto == NULL)
1749 {
1750 as_bad_where (fixp->fx_file, fixp->fx_line,
1751 _("cannot represent `%s' relocation in object file"),
1752 bfd_get_reloc_code_name (fixp->fx_r_type));
1753 return NULL;
1754 }
1755
1756 if (!fixp->fx_pcrel != !reloc->howto->pc_relative)
1757 {
1758 as_fatal (_("internal error? cannot generate `%s' relocation (%d, %d)"),
1759 bfd_get_reloc_code_name (fixp->fx_r_type),
1760 fixp->fx_pcrel, reloc->howto->pc_relative);
1761 }
1762 gas_assert (!fixp->fx_pcrel == !reloc->howto->pc_relative);
1763
1764 reloc->addend = fixp->fx_offset;
1765
1766 return reloc;
1767 }
1768
1769
1770 /* The location from which a PC relative jump should be calculated,
1771 given a PC relative reloc. */
1772
1773 long
md_pcrel_from(fixS * fixP)1774 md_pcrel_from (fixS *fixP)
1775 {
1776 return fixP->fx_frag->fr_address + fixP->fx_where;
1777 }
1778
1779
1780 /* Return 1 if it's OK to adjust a reloc by replacing the symbol with
1781 a section symbol plus some offset. */
1782 int
tilegx_fix_adjustable(fixS * fix)1783 tilegx_fix_adjustable (fixS *fix)
1784 {
1785 /* Prevent all adjustments to global symbols */
1786 if (S_IS_EXTERNAL (fix->fx_addsy) || S_IS_WEAK (fix->fx_addsy))
1787 return 0;
1788
1789 return 1;
1790 }
1791
1792
1793 int
tilegx_unrecognized_line(int ch)1794 tilegx_unrecognized_line (int ch)
1795 {
1796 switch (ch)
1797 {
1798 case '{':
1799 if (inside_bundle)
1800 {
1801 as_bad (_("Found '{' when already bundling."));
1802 }
1803 else
1804 {
1805 inside_bundle = 1;
1806 current_bundle_index = 0;
1807 }
1808 return 1;
1809
1810 case '}':
1811 if (!inside_bundle)
1812 {
1813 as_bad (_("Found '}' when not bundling."));
1814 }
1815 else
1816 {
1817 tilegx_flush_bundle ();
1818 }
1819
1820 /* Allow '{' to follow on the same line. We also allow ";;", but that
1821 happens automatically because ';' is an end of line marker. */
1822 SKIP_WHITESPACE ();
1823 if (input_line_pointer[0] == '{')
1824 {
1825 input_line_pointer++;
1826 return tilegx_unrecognized_line ('{');
1827 }
1828
1829 demand_empty_rest_of_line ();
1830 return 1;
1831
1832 default:
1833 break;
1834 }
1835
1836 /* Not a valid line. */
1837 return 0;
1838 }
1839
1840
1841 /* This is called from HANDLE_ALIGN in write.c. Fill in the contents
1842 of an rs_align_code fragment. */
1843
1844 void
tilegx_handle_align(fragS * fragp)1845 tilegx_handle_align (fragS *fragp)
1846 {
1847 addressT bytes, fix;
1848 char *p;
1849
1850 if (fragp->fr_type != rs_align_code)
1851 return;
1852
1853 bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix;
1854 p = fragp->fr_literal + fragp->fr_fix;
1855 fix = 0;
1856
1857 /* Determine the bits for NOP. */
1858 const struct tilegx_opcode *nop_opcode =
1859 &tilegx_opcodes[TILEGX_OPC_NOP];
1860 tilegx_bundle_bits nop =
1861 ( nop_opcode->fixed_bit_values[TILEGX_PIPELINE_X0]
1862 | nop_opcode->fixed_bit_values[TILEGX_PIPELINE_X1]);
1863
1864 if ((bytes & (TILEGX_BUNDLE_SIZE_IN_BYTES - 1)) != 0)
1865 {
1866 fix = bytes & (TILEGX_BUNDLE_SIZE_IN_BYTES - 1);
1867 memset (p, 0, fix);
1868 p += fix;
1869 bytes -= fix;
1870 }
1871
1872 number_to_chars_littleendian (p, nop, 8);
1873 fragp->fr_fix += fix;
1874 fragp->fr_var = TILEGX_BUNDLE_SIZE_IN_BYTES;
1875 }
1876
1877 /* Standard calling conventions leave the CFA at SP on entry. */
1878 void
tilegx_cfi_frame_initial_instructions(void)1879 tilegx_cfi_frame_initial_instructions (void)
1880 {
1881 cfi_add_CFA_def_cfa_register (54);
1882 }
1883
1884 int
tc_tilegx_regname_to_dw2regnum(char * regname)1885 tc_tilegx_regname_to_dw2regnum (char *regname)
1886 {
1887 int i;
1888 for (i = 0; i < TILEGX_NUM_REGISTERS; i++)
1889 {
1890 if (!strcmp (regname, tilegx_register_names[i]))
1891 return i;
1892 }
1893
1894 return -1;
1895 }
1896