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[deliverable/binutils-gdb.git] / gas / config / tc-arc.c
1 /* tc-arc.c -- Assembler for the ARC
2 Copyright (C) 1994-2016 Free Software Foundation, Inc.
3
4 Contributor: Claudiu Zissulescu <claziss@synopsys.com>
5
6 This file is part of GAS, the GNU Assembler.
7
8 GAS is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GAS is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GAS; see the file COPYING. If not, write to the Free
20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "as.h"
24 #include "subsegs.h"
25 #include "struc-symbol.h"
26 #include "dwarf2dbg.h"
27 #include "dw2gencfi.h"
28 #include "safe-ctype.h"
29
30 #include "opcode/arc.h"
31 #include "elf/arc.h"
32 #include "../opcodes/arc-ext.h"
33
34 /* Defines section. */
35
36 #define MAX_INSN_FIXUPS 2
37 #define MAX_CONSTR_STR 20
38 #define FRAG_MAX_GROWTH 8
39
40 #ifdef DEBUG
41 # define pr_debug(fmt, args...) fprintf (stderr, fmt, ##args)
42 #else
43 # define pr_debug(fmt, args...)
44 #endif
45
46 #define MAJOR_OPCODE(x) (((x) & 0xF8000000) >> 27)
47 #define SUB_OPCODE(x) (((x) & 0x003F0000) >> 16)
48 #define LP_INSN(x) ((MAJOR_OPCODE (x) == 0x4) \
49 && (SUB_OPCODE (x) == 0x28))
50
51 /* Equal to MAX_PRECISION in atof-ieee.c. */
52 #define MAX_LITTLENUMS 6
53
54 #ifndef TARGET_WITH_CPU
55 #define TARGET_WITH_CPU "arc700"
56 #endif /* TARGET_WITH_CPU */
57
58 /* Enum used to enumerate the relaxable ins operands. */
59 enum rlx_operand_type
60 {
61 EMPTY = 0,
62 REGISTER,
63 REGISTER_S, /* Register for short instruction(s). */
64 REGISTER_NO_GP, /* Is a register but not gp register specifically. */
65 REGISTER_DUP, /* Duplication of previous operand of type register. */
66 IMMEDIATE,
67 BRACKET
68 };
69
70 enum arc_rlx_types
71 {
72 ARC_RLX_NONE = 0,
73 ARC_RLX_BL_S,
74 ARC_RLX_BL,
75 ARC_RLX_B_S,
76 ARC_RLX_B,
77 ARC_RLX_ADD_U3,
78 ARC_RLX_ADD_U6,
79 ARC_RLX_ADD_LIMM,
80 ARC_RLX_LD_U7,
81 ARC_RLX_LD_S9,
82 ARC_RLX_LD_LIMM,
83 ARC_RLX_MOV_U8,
84 ARC_RLX_MOV_S12,
85 ARC_RLX_MOV_LIMM,
86 ARC_RLX_SUB_U3,
87 ARC_RLX_SUB_U6,
88 ARC_RLX_SUB_LIMM,
89 ARC_RLX_MPY_U6,
90 ARC_RLX_MPY_LIMM,
91 ARC_RLX_MOV_RU6,
92 ARC_RLX_MOV_RLIMM,
93 ARC_RLX_ADD_RRU6,
94 ARC_RLX_ADD_RRLIMM,
95 };
96
97 /* Macros section. */
98
99 #define regno(x) ((x) & 0x3F)
100 #define is_ir_num(x) (((x) & ~0x3F) == 0)
101 #define is_code_density_p(sc) (((sc) == CD1 || (sc) == CD2))
102 #define is_spfp_p(op) (((sc) == SPX))
103 #define is_dpfp_p(op) (((sc) == DPX))
104 #define is_fpuda_p(op) (((sc) == DPA))
105 #define is_br_jmp_insn_p(op) (((op)->insn_class == BRANCH \
106 || (op)->insn_class == JUMP))
107 #define is_kernel_insn_p(op) (((op)->insn_class == KERNEL))
108 #define is_nps400_p(op) (((sc) == NPS400))
109
110 /* Generic assembler global variables which must be defined by all
111 targets. */
112
113 /* Characters which always start a comment. */
114 const char comment_chars[] = "#;";
115
116 /* Characters which start a comment at the beginning of a line. */
117 const char line_comment_chars[] = "#";
118
119 /* Characters which may be used to separate multiple commands on a
120 single line. */
121 const char line_separator_chars[] = "`";
122
123 /* Characters which are used to indicate an exponent in a floating
124 point number. */
125 const char EXP_CHARS[] = "eE";
126
127 /* Chars that mean this number is a floating point constant
128 As in 0f12.456 or 0d1.2345e12. */
129 const char FLT_CHARS[] = "rRsSfFdD";
130
131 /* Byte order. */
132 extern int target_big_endian;
133 const char *arc_target_format = DEFAULT_TARGET_FORMAT;
134 static int byte_order = DEFAULT_BYTE_ORDER;
135
136 /* Arc extension section. */
137 static segT arcext_section;
138
139 /* By default relaxation is disabled. */
140 static int relaxation_state = 0;
141
142 extern int arc_get_mach (char *);
143
144 /* Forward declarations. */
145 static void arc_lcomm (int);
146 static void arc_option (int);
147 static void arc_extra_reloc (int);
148 static void arc_extinsn (int);
149 static void arc_extcorereg (int);
150
151 const pseudo_typeS md_pseudo_table[] =
152 {
153 /* Make sure that .word is 32 bits. */
154 { "word", cons, 4 },
155
156 { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
157 { "lcomm", arc_lcomm, 0 },
158 { "lcommon", arc_lcomm, 0 },
159 { "cpu", arc_option, 0 },
160
161 { "extinstruction", arc_extinsn, 0 },
162 { "extcoreregister", arc_extcorereg, EXT_CORE_REGISTER },
163 { "extauxregister", arc_extcorereg, EXT_AUX_REGISTER },
164 { "extcondcode", arc_extcorereg, EXT_COND_CODE },
165
166 { "tls_gd_ld", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_LD },
167 { "tls_gd_call", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_CALL },
168
169 { NULL, NULL, 0 }
170 };
171
172 const char *md_shortopts = "";
173
174 enum options
175 {
176 OPTION_EB = OPTION_MD_BASE,
177 OPTION_EL,
178
179 OPTION_ARC600,
180 OPTION_ARC601,
181 OPTION_ARC700,
182 OPTION_ARCEM,
183 OPTION_ARCHS,
184
185 OPTION_MCPU,
186 OPTION_CD,
187 OPTION_RELAX,
188 OPTION_NPS400,
189
190 OPTION_SPFP,
191 OPTION_DPFP,
192 OPTION_FPUDA,
193
194 /* The following options are deprecated and provided here only for
195 compatibility reasons. */
196 OPTION_USER_MODE,
197 OPTION_LD_EXT_MASK,
198 OPTION_SWAP,
199 OPTION_NORM,
200 OPTION_BARREL_SHIFT,
201 OPTION_MIN_MAX,
202 OPTION_NO_MPY,
203 OPTION_EA,
204 OPTION_MUL64,
205 OPTION_SIMD,
206 OPTION_XMAC_D16,
207 OPTION_XMAC_24,
208 OPTION_DSP_PACKA,
209 OPTION_CRC,
210 OPTION_DVBF,
211 OPTION_TELEPHONY,
212 OPTION_XYMEMORY,
213 OPTION_LOCK,
214 OPTION_SWAPE,
215 OPTION_RTSC
216 };
217
218 struct option md_longopts[] =
219 {
220 { "EB", no_argument, NULL, OPTION_EB },
221 { "EL", no_argument, NULL, OPTION_EL },
222 { "mcpu", required_argument, NULL, OPTION_MCPU },
223 { "mA6", no_argument, NULL, OPTION_ARC600 },
224 { "mARC600", no_argument, NULL, OPTION_ARC600 },
225 { "mARC601", no_argument, NULL, OPTION_ARC601 },
226 { "mARC700", no_argument, NULL, OPTION_ARC700 },
227 { "mA7", no_argument, NULL, OPTION_ARC700 },
228 { "mEM", no_argument, NULL, OPTION_ARCEM },
229 { "mHS", no_argument, NULL, OPTION_ARCHS },
230 { "mcode-density", no_argument, NULL, OPTION_CD },
231 { "mrelax", no_argument, NULL, OPTION_RELAX },
232 { "mnps400", no_argument, NULL, OPTION_NPS400 },
233
234 /* Floating point options */
235 { "mspfp", no_argument, NULL, OPTION_SPFP},
236 { "mspfp-compact", no_argument, NULL, OPTION_SPFP},
237 { "mspfp_compact", no_argument, NULL, OPTION_SPFP},
238 { "mspfp-fast", no_argument, NULL, OPTION_SPFP},
239 { "mspfp_fast", no_argument, NULL, OPTION_SPFP},
240 { "mdpfp", no_argument, NULL, OPTION_DPFP},
241 { "mdpfp-compact", no_argument, NULL, OPTION_DPFP},
242 { "mdpfp_compact", no_argument, NULL, OPTION_DPFP},
243 { "mdpfp-fast", no_argument, NULL, OPTION_DPFP},
244 { "mdpfp_fast", no_argument, NULL, OPTION_DPFP},
245 { "mfpuda", no_argument, NULL, OPTION_FPUDA},
246
247 /* The following options are deprecated and provided here only for
248 compatibility reasons. */
249 { "mav2em", no_argument, NULL, OPTION_ARCEM },
250 { "mav2hs", no_argument, NULL, OPTION_ARCHS },
251 { "muser-mode-only", no_argument, NULL, OPTION_USER_MODE },
252 { "mld-extension-reg-mask", required_argument, NULL, OPTION_LD_EXT_MASK },
253 { "mswap", no_argument, NULL, OPTION_SWAP },
254 { "mnorm", no_argument, NULL, OPTION_NORM },
255 { "mbarrel-shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
256 { "mbarrel_shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
257 { "mmin-max", no_argument, NULL, OPTION_MIN_MAX },
258 { "mmin_max", no_argument, NULL, OPTION_MIN_MAX },
259 { "mno-mpy", no_argument, NULL, OPTION_NO_MPY },
260 { "mea", no_argument, NULL, OPTION_EA },
261 { "mEA", no_argument, NULL, OPTION_EA },
262 { "mmul64", no_argument, NULL, OPTION_MUL64 },
263 { "msimd", no_argument, NULL, OPTION_SIMD},
264 { "mmac-d16", no_argument, NULL, OPTION_XMAC_D16},
265 { "mmac_d16", no_argument, NULL, OPTION_XMAC_D16},
266 { "mmac-24", no_argument, NULL, OPTION_XMAC_24},
267 { "mmac_24", no_argument, NULL, OPTION_XMAC_24},
268 { "mdsp-packa", no_argument, NULL, OPTION_DSP_PACKA},
269 { "mdsp_packa", no_argument, NULL, OPTION_DSP_PACKA},
270 { "mcrc", no_argument, NULL, OPTION_CRC},
271 { "mdvbf", no_argument, NULL, OPTION_DVBF},
272 { "mtelephony", no_argument, NULL, OPTION_TELEPHONY},
273 { "mxy", no_argument, NULL, OPTION_XYMEMORY},
274 { "mlock", no_argument, NULL, OPTION_LOCK},
275 { "mswape", no_argument, NULL, OPTION_SWAPE},
276 { "mrtsc", no_argument, NULL, OPTION_RTSC},
277
278 { NULL, no_argument, NULL, 0 }
279 };
280
281 size_t md_longopts_size = sizeof (md_longopts);
282
283 /* Local data and data types. */
284
285 /* Used since new relocation types are introduced in this
286 file (DUMMY_RELOC_LITUSE_*). */
287 typedef int extended_bfd_reloc_code_real_type;
288
289 struct arc_fixup
290 {
291 expressionS exp;
292
293 extended_bfd_reloc_code_real_type reloc;
294
295 /* index into arc_operands. */
296 unsigned int opindex;
297
298 /* PC-relative, used by internals fixups. */
299 unsigned char pcrel;
300
301 /* TRUE if this fixup is for LIMM operand. */
302 bfd_boolean islong;
303 };
304
305 struct arc_insn
306 {
307 unsigned long long int insn;
308 int nfixups;
309 struct arc_fixup fixups[MAX_INSN_FIXUPS];
310 long limm;
311 unsigned int len; /* Length of instruction in bytes. */
312 bfd_boolean has_limm; /* Boolean value: TRUE if limm field is
313 valid. */
314 bfd_boolean relax; /* Boolean value: TRUE if needs
315 relaxation. */
316 };
317
318 /* Structure to hold any last two instructions. */
319 static struct arc_last_insn
320 {
321 /* Saved instruction opcode. */
322 const struct arc_opcode *opcode;
323
324 /* Boolean value: TRUE if current insn is short. */
325 bfd_boolean has_limm;
326
327 /* Boolean value: TRUE if current insn has delay slot. */
328 bfd_boolean has_delay_slot;
329 } arc_last_insns[2];
330
331 /* Extension instruction suffix classes. */
332 typedef struct
333 {
334 const char *name;
335 int len;
336 int attr_class;
337 } attributes_t;
338
339 static const attributes_t suffixclass[] =
340 {
341 { "SUFFIX_FLAG", 11, ARC_SUFFIX_FLAG },
342 { "SUFFIX_COND", 11, ARC_SUFFIX_COND },
343 { "SUFFIX_NONE", 11, ARC_SUFFIX_NONE }
344 };
345
346 /* Extension instruction syntax classes. */
347 static const attributes_t syntaxclass[] =
348 {
349 { "SYNTAX_3OP", 10, ARC_SYNTAX_3OP },
350 { "SYNTAX_2OP", 10, ARC_SYNTAX_2OP },
351 { "SYNTAX_1OP", 10, ARC_SYNTAX_1OP },
352 { "SYNTAX_NOP", 10, ARC_SYNTAX_NOP }
353 };
354
355 /* Extension instruction syntax classes modifiers. */
356 static const attributes_t syntaxclassmod[] =
357 {
358 { "OP1_IMM_IMPLIED" , 15, ARC_OP1_IMM_IMPLIED },
359 { "OP1_MUST_BE_IMM" , 15, ARC_OP1_MUST_BE_IMM }
360 };
361
362 /* Extension register type. */
363 typedef struct
364 {
365 char *name;
366 int number;
367 int imode;
368 } extRegister_t;
369
370 /* A structure to hold the additional conditional codes. */
371 static struct
372 {
373 struct arc_flag_operand *arc_ext_condcode;
374 int size;
375 } ext_condcode = { NULL, 0 };
376
377 /* Structure to hold an entry in ARC_OPCODE_HASH. */
378 struct arc_opcode_hash_entry
379 {
380 /* The number of pointers in the OPCODE list. */
381 size_t count;
382
383 /* Points to a list of opcode pointers. */
384 const struct arc_opcode **opcode;
385 };
386
387 /* Structure used for iterating through an arc_opcode_hash_entry. */
388 struct arc_opcode_hash_entry_iterator
389 {
390 /* Index into the OPCODE element of the arc_opcode_hash_entry. */
391 size_t index;
392
393 /* The specific ARC_OPCODE from the ARC_OPCODES table that was last
394 returned by this iterator. */
395 const struct arc_opcode *opcode;
396 };
397
398 /* Forward declaration. */
399 static void assemble_insn
400 (const struct arc_opcode *, const expressionS *, int,
401 const struct arc_flags *, int, struct arc_insn *);
402
403 /* The selection of the machine type can come from different sources. This
404 enum is used to track how the selection was made in order to perform
405 error checks. */
406 enum mach_selection_type
407 {
408 MACH_SELECTION_NONE,
409 MACH_SELECTION_FROM_DEFAULT,
410 MACH_SELECTION_FROM_CPU_DIRECTIVE,
411 MACH_SELECTION_FROM_COMMAND_LINE
412 };
413
414 /* How the current machine type was selected. */
415 static enum mach_selection_type mach_selection_mode = MACH_SELECTION_NONE;
416
417 /* The hash table of instruction opcodes. */
418 static struct hash_control *arc_opcode_hash;
419
420 /* The hash table of register symbols. */
421 static struct hash_control *arc_reg_hash;
422
423 /* The hash table of aux register symbols. */
424 static struct hash_control *arc_aux_hash;
425
426 /* The hash table of address types. */
427 static struct hash_control *arc_addrtype_hash;
428
429 /* A table of CPU names and opcode sets. */
430 static const struct cpu_type
431 {
432 const char *name;
433 unsigned flags;
434 int mach;
435 unsigned eflags;
436 unsigned features;
437 }
438 cpu_types[] =
439 {
440 { "arc600", ARC_OPCODE_ARC600, bfd_mach_arc_arc600,
441 E_ARC_MACH_ARC600, 0x00},
442 { "arc700", ARC_OPCODE_ARC700, bfd_mach_arc_arc700,
443 E_ARC_MACH_ARC700, 0x00},
444 { "nps400", ARC_OPCODE_ARC700 , bfd_mach_arc_arc700,
445 E_ARC_MACH_ARC700, ARC_NPS400},
446 { "arcem", ARC_OPCODE_ARCv2EM, bfd_mach_arc_arcv2,
447 EF_ARC_CPU_ARCV2EM, 0x00},
448 { "archs", ARC_OPCODE_ARCv2HS, bfd_mach_arc_arcv2,
449 EF_ARC_CPU_ARCV2HS, ARC_CD},
450 { 0, 0, 0, 0, 0 }
451 };
452
453 /* Information about the cpu/variant we're assembling for. */
454 static struct cpu_type selected_cpu = { 0, 0, 0, 0, 0 };
455
456 /* A table with options. */
457 static const struct feature_type
458 {
459 unsigned feature;
460 unsigned cpus;
461 const char *name;
462 }
463 feature_list[] =
464 {
465 { ARC_CD, ARC_OPCODE_ARCV2, "code-density" },
466 { ARC_NPS400, ARC_OPCODE_ARC700, "nps400" },
467 { ARC_SPFP, ARC_OPCODE_ARCFPX, "single-precision FPX" },
468 { ARC_DPFP, ARC_OPCODE_ARCFPX, "double-precision FPX" },
469 { ARC_FPUDA, ARC_OPCODE_ARCv2EM, "double assist FP" }
470 };
471
472 /* Used by the arc_reloc_op table. Order is important. */
473 #define O_gotoff O_md1 /* @gotoff relocation. */
474 #define O_gotpc O_md2 /* @gotpc relocation. */
475 #define O_plt O_md3 /* @plt relocation. */
476 #define O_sda O_md4 /* @sda relocation. */
477 #define O_pcl O_md5 /* @pcl relocation. */
478 #define O_tlsgd O_md6 /* @tlsgd relocation. */
479 #define O_tlsie O_md7 /* @tlsie relocation. */
480 #define O_tpoff9 O_md8 /* @tpoff9 relocation. */
481 #define O_tpoff O_md9 /* @tpoff relocation. */
482 #define O_dtpoff9 O_md10 /* @dtpoff9 relocation. */
483 #define O_dtpoff O_md11 /* @dtpoff relocation. */
484 #define O_last O_dtpoff
485
486 /* Used to define a bracket as operand in tokens. */
487 #define O_bracket O_md32
488
489 /* Used to define a colon as an operand in tokens. */
490 #define O_colon O_md31
491
492 /* Used to define address types in nps400. */
493 #define O_addrtype O_md30
494
495 /* Dummy relocation, to be sorted out. */
496 #define DUMMY_RELOC_ARC_ENTRY (BFD_RELOC_UNUSED + 1)
497
498 #define USER_RELOC_P(R) ((R) >= O_gotoff && (R) <= O_last)
499
500 /* A table to map the spelling of a relocation operand into an appropriate
501 bfd_reloc_code_real_type type. The table is assumed to be ordered such
502 that op-O_literal indexes into it. */
503 #define ARC_RELOC_TABLE(op) \
504 (&arc_reloc_op[ ((!USER_RELOC_P (op)) \
505 ? (abort (), 0) \
506 : (int) (op) - (int) O_gotoff) ])
507
508 #define DEF(NAME, RELOC, REQ) \
509 { #NAME, sizeof (#NAME)-1, O_##NAME, RELOC, REQ}
510
511 static const struct arc_reloc_op_tag
512 {
513 /* String to lookup. */
514 const char *name;
515 /* Size of the string. */
516 size_t length;
517 /* Which operator to use. */
518 operatorT op;
519 extended_bfd_reloc_code_real_type reloc;
520 /* Allows complex relocation expression like identifier@reloc +
521 const. */
522 unsigned int complex_expr : 1;
523 }
524 arc_reloc_op[] =
525 {
526 DEF (gotoff, BFD_RELOC_ARC_GOTOFF, 1),
527 DEF (gotpc, BFD_RELOC_ARC_GOTPC32, 0),
528 DEF (plt, BFD_RELOC_ARC_PLT32, 0),
529 DEF (sda, DUMMY_RELOC_ARC_ENTRY, 1),
530 DEF (pcl, BFD_RELOC_ARC_PC32, 1),
531 DEF (tlsgd, BFD_RELOC_ARC_TLS_GD_GOT, 0),
532 DEF (tlsie, BFD_RELOC_ARC_TLS_IE_GOT, 0),
533 DEF (tpoff9, BFD_RELOC_ARC_TLS_LE_S9, 0),
534 DEF (tpoff, BFD_RELOC_ARC_TLS_LE_32, 1),
535 DEF (dtpoff9, BFD_RELOC_ARC_TLS_DTPOFF_S9, 0),
536 DEF (dtpoff, BFD_RELOC_ARC_TLS_DTPOFF, 1),
537 };
538
539 static const int arc_num_reloc_op
540 = sizeof (arc_reloc_op) / sizeof (*arc_reloc_op);
541
542 /* Structure for relaxable instruction that have to be swapped with a
543 smaller alternative instruction. */
544 struct arc_relaxable_ins
545 {
546 /* Mnemonic that should be checked. */
547 const char *mnemonic_r;
548
549 /* Operands that should be checked.
550 Indexes of operands from operand array. */
551 enum rlx_operand_type operands[6];
552
553 /* Flags that should be checked. */
554 unsigned flag_classes[5];
555
556 /* Mnemonic (smaller) alternative to be used later for relaxation. */
557 const char *mnemonic_alt;
558
559 /* Index of operand that generic relaxation has to check. */
560 unsigned opcheckidx;
561
562 /* Base subtype index used. */
563 enum arc_rlx_types subtype;
564 };
565
566 #define RELAX_TABLE_ENTRY(BITS, ISSIGNED, SIZE, NEXT) \
567 { (ISSIGNED) ? ((1 << ((BITS) - 1)) - 1) : ((1 << (BITS)) - 1), \
568 (ISSIGNED) ? -(1 << ((BITS) - 1)) : 0, \
569 (SIZE), \
570 (NEXT) } \
571
572 #define RELAX_TABLE_ENTRY_MAX(ISSIGNED, SIZE, NEXT) \
573 { (ISSIGNED) ? 0x7FFFFFFF : 0xFFFFFFFF, \
574 (ISSIGNED) ? -(0x7FFFFFFF) : 0, \
575 (SIZE), \
576 (NEXT) } \
577
578
579 /* ARC relaxation table. */
580 const relax_typeS md_relax_table[] =
581 {
582 /* Fake entry. */
583 {0, 0, 0, 0},
584
585 /* BL_S s13 ->
586 BL s25. */
587 RELAX_TABLE_ENTRY (13, 1, 2, ARC_RLX_BL),
588 RELAX_TABLE_ENTRY (25, 1, 4, ARC_RLX_NONE),
589
590 /* B_S s10 ->
591 B s25. */
592 RELAX_TABLE_ENTRY (10, 1, 2, ARC_RLX_B),
593 RELAX_TABLE_ENTRY (25, 1, 4, ARC_RLX_NONE),
594
595 /* ADD_S c,b, u3 ->
596 ADD<.f> a,b,u6 ->
597 ADD<.f> a,b,limm. */
598 RELAX_TABLE_ENTRY (3, 0, 2, ARC_RLX_ADD_U6),
599 RELAX_TABLE_ENTRY (6, 0, 4, ARC_RLX_ADD_LIMM),
600 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
601
602 /* LD_S a, [b, u7] ->
603 LD<zz><.x><.aa><.di> a, [b, s9] ->
604 LD<zz><.x><.aa><.di> a, [b, limm] */
605 RELAX_TABLE_ENTRY (7, 0, 2, ARC_RLX_LD_S9),
606 RELAX_TABLE_ENTRY (9, 1, 4, ARC_RLX_LD_LIMM),
607 RELAX_TABLE_ENTRY_MAX (1, 8, ARC_RLX_NONE),
608
609 /* MOV_S b, u8 ->
610 MOV<.f> b, s12 ->
611 MOV<.f> b, limm. */
612 RELAX_TABLE_ENTRY (8, 0, 2, ARC_RLX_MOV_S12),
613 RELAX_TABLE_ENTRY (8, 0, 4, ARC_RLX_MOV_LIMM),
614 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
615
616 /* SUB_S c, b, u3 ->
617 SUB<.f> a, b, u6 ->
618 SUB<.f> a, b, limm. */
619 RELAX_TABLE_ENTRY (3, 0, 2, ARC_RLX_SUB_U6),
620 RELAX_TABLE_ENTRY (6, 0, 4, ARC_RLX_SUB_LIMM),
621 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
622
623 /* MPY<.f> a, b, u6 ->
624 MPY<.f> a, b, limm. */
625 RELAX_TABLE_ENTRY (6, 0, 4, ARC_RLX_MPY_LIMM),
626 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
627
628 /* MOV<.f><.cc> b, u6 ->
629 MOV<.f><.cc> b, limm. */
630 RELAX_TABLE_ENTRY (6, 0, 4, ARC_RLX_MOV_RLIMM),
631 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
632
633 /* ADD<.f><.cc> b, b, u6 ->
634 ADD<.f><.cc> b, b, limm. */
635 RELAX_TABLE_ENTRY (6, 0, 4, ARC_RLX_ADD_RRLIMM),
636 RELAX_TABLE_ENTRY_MAX (0, 8, ARC_RLX_NONE),
637 };
638
639 /* Order of this table's entries matters! */
640 const struct arc_relaxable_ins arc_relaxable_insns[] =
641 {
642 { "bl", { IMMEDIATE }, { 0 }, "bl_s", 0, ARC_RLX_BL_S },
643 { "b", { IMMEDIATE }, { 0 }, "b_s", 0, ARC_RLX_B_S },
644 { "add", { REGISTER, REGISTER_DUP, IMMEDIATE }, { 5, 1, 0 }, "add",
645 2, ARC_RLX_ADD_RRU6},
646 { "add", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "add_s", 2,
647 ARC_RLX_ADD_U3 },
648 { "add", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "add", 2,
649 ARC_RLX_ADD_U6 },
650 { "ld", { REGISTER_S, BRACKET, REGISTER_S, IMMEDIATE, BRACKET },
651 { 0 }, "ld_s", 3, ARC_RLX_LD_U7 },
652 { "ld", { REGISTER, BRACKET, REGISTER_NO_GP, IMMEDIATE, BRACKET },
653 { 11, 4, 14, 17, 0 }, "ld", 3, ARC_RLX_LD_S9 },
654 { "mov", { REGISTER_S, IMMEDIATE }, { 0 }, "mov_s", 1, ARC_RLX_MOV_U8 },
655 { "mov", { REGISTER, IMMEDIATE }, { 5, 0 }, "mov", 1, ARC_RLX_MOV_S12 },
656 { "mov", { REGISTER, IMMEDIATE }, { 5, 1, 0 },"mov", 1, ARC_RLX_MOV_RU6 },
657 { "sub", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "sub_s", 2,
658 ARC_RLX_SUB_U3 },
659 { "sub", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "sub", 2,
660 ARC_RLX_SUB_U6 },
661 { "mpy", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "mpy", 2,
662 ARC_RLX_MPY_U6 },
663 };
664
665 const unsigned arc_num_relaxable_ins = ARRAY_SIZE (arc_relaxable_insns);
666
667 /* Flags to set in the elf header. */
668 static const flagword arc_initial_eflag = 0x00;
669
670 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
671 symbolS * GOT_symbol = 0;
672
673 /* Set to TRUE when we assemble instructions. */
674 static bfd_boolean assembling_insn = FALSE;
675
676 /* Functions implementation. */
677
678 /* Return a pointer to ARC_OPCODE_HASH_ENTRY that identifies all
679 ARC_OPCODE entries in ARC_OPCODE_HASH that match NAME, or NULL if there
680 are no matching entries in ARC_OPCODE_HASH. */
681
682 static const struct arc_opcode_hash_entry *
683 arc_find_opcode (const char *name)
684 {
685 const struct arc_opcode_hash_entry *entry;
686
687 entry = hash_find (arc_opcode_hash, name);
688 return entry;
689 }
690
691 /* Initialise the iterator ITER. */
692
693 static void
694 arc_opcode_hash_entry_iterator_init (struct arc_opcode_hash_entry_iterator *iter)
695 {
696 iter->index = 0;
697 iter->opcode = NULL;
698 }
699
700 /* Return the next ARC_OPCODE from ENTRY, using ITER to hold state between
701 calls to this function. Return NULL when all ARC_OPCODE entries have
702 been returned. */
703
704 static const struct arc_opcode *
705 arc_opcode_hash_entry_iterator_next (const struct arc_opcode_hash_entry *entry,
706 struct arc_opcode_hash_entry_iterator *iter)
707 {
708 if (iter->opcode == NULL && iter->index == 0)
709 {
710 gas_assert (entry->count > 0);
711 iter->opcode = entry->opcode[iter->index];
712 }
713 else if (iter->opcode != NULL)
714 {
715 const char *old_name = iter->opcode->name;
716
717 iter->opcode++;
718 if (iter->opcode->name == NULL
719 || strcmp (old_name, iter->opcode->name) != 0)
720 {
721 iter->index++;
722 if (iter->index == entry->count)
723 iter->opcode = NULL;
724 else
725 iter->opcode = entry->opcode[iter->index];
726 }
727 }
728
729 return iter->opcode;
730 }
731
732 /* Insert an opcode into opcode hash structure. */
733
734 static void
735 arc_insert_opcode (const struct arc_opcode *opcode)
736 {
737 const char *name, *retval;
738 struct arc_opcode_hash_entry *entry;
739 name = opcode->name;
740
741 entry = hash_find (arc_opcode_hash, name);
742 if (entry == NULL)
743 {
744 entry = XNEW (struct arc_opcode_hash_entry);
745 entry->count = 0;
746 entry->opcode = NULL;
747
748 retval = hash_insert (arc_opcode_hash, name, (void *) entry);
749 if (retval)
750 as_fatal (_("internal error: can't hash opcode '%s': %s"),
751 name, retval);
752 }
753
754 entry->opcode = XRESIZEVEC (const struct arc_opcode *, entry->opcode,
755 entry->count + 1);
756
757 if (entry->opcode == NULL)
758 as_fatal (_("Virtual memory exhausted"));
759
760 entry->opcode[entry->count] = opcode;
761 entry->count++;
762 }
763
764
765 /* Like md_number_to_chars but for middle-endian values. The 4-byte limm
766 value, is encoded as 'middle-endian' for a little-endian target. This
767 function is used for regular 4, 6, and 8 byte instructions as well. */
768
769 static void
770 md_number_to_chars_midend (char *buf, unsigned long long val, int n)
771 {
772 switch (n)
773 {
774 case 2:
775 md_number_to_chars (buf, val, n);
776 break;
777 case 6:
778 md_number_to_chars (buf, (val & 0xffff00000000) >> 32, 2);
779 md_number_to_chars_midend (buf + 2, (val & 0xffffffff), 4);
780 break;
781 case 4:
782 md_number_to_chars (buf, (val & 0xffff0000) >> 16, 2);
783 md_number_to_chars (buf + 2, (val & 0xffff), 2);
784 break;
785 case 8:
786 md_number_to_chars_midend (buf, (val & 0xffffffff00000000) >> 32, 4);
787 md_number_to_chars_midend (buf + 4, (val & 0xffffffff), 4);
788 break;
789 default:
790 abort ();
791 }
792 }
793
794 /* Check if a feature is allowed for a specific CPU. */
795
796 static void
797 arc_check_feature (void)
798 {
799 unsigned i;
800
801 if (!selected_cpu.features
802 || !selected_cpu.name)
803 return;
804 for (i = 0; (i < ARRAY_SIZE (feature_list)); i++)
805 {
806 if ((selected_cpu.features & feature_list[i].feature)
807 && !(selected_cpu.flags & feature_list[i].cpus))
808 {
809 as_bad (_("invalid %s option for %s cpu"), feature_list[i].name,
810 selected_cpu.name);
811 }
812 }
813 }
814
815 /* Select an appropriate entry from CPU_TYPES based on ARG and initialise
816 the relevant static global variables. Parameter SEL describes where
817 this selection originated from. */
818
819 static void
820 arc_select_cpu (const char *arg, enum mach_selection_type sel)
821 {
822 int cpu_flags = 0;
823 int i;
824
825 /* We should only set a default if we've not made a selection from some
826 other source. */
827 gas_assert (sel != MACH_SELECTION_FROM_DEFAULT
828 || mach_selection_mode == MACH_SELECTION_NONE);
829
830 if ((mach_selection_mode == MACH_SELECTION_FROM_CPU_DIRECTIVE)
831 && (sel == MACH_SELECTION_FROM_CPU_DIRECTIVE))
832 as_bad (_("Multiple .cpu directives found"));
833
834 /* Look for a matching entry in CPU_TYPES array. */
835 for (i = 0; cpu_types[i].name; ++i)
836 {
837 if (!strcasecmp (cpu_types[i].name, arg))
838 {
839 /* If a previous selection was made on the command line, then we
840 allow later selections on the command line to override earlier
841 ones. However, a selection from a '.cpu NAME' directive must
842 match the command line selection, or we give a warning. */
843 if (mach_selection_mode == MACH_SELECTION_FROM_COMMAND_LINE)
844 {
845 gas_assert (sel == MACH_SELECTION_FROM_COMMAND_LINE
846 || sel == MACH_SELECTION_FROM_CPU_DIRECTIVE);
847 if (sel == MACH_SELECTION_FROM_CPU_DIRECTIVE
848 && selected_cpu.mach != cpu_types[i].mach)
849 {
850 as_warn (_("Command-line value overrides \".cpu\" directive"));
851 }
852 return;
853 }
854
855 /* Initialise static global data about selected machine type. */
856 selected_cpu.flags = cpu_types[i].flags;
857 selected_cpu.name = cpu_types[i].name;
858 selected_cpu.features |= cpu_types[i].features;
859 selected_cpu.mach = cpu_types[i].mach;
860 cpu_flags = cpu_types[i].eflags;
861 break;
862 }
863 }
864
865 if (!cpu_types[i].name)
866 as_fatal (_("unknown architecture: %s\n"), arg);
867
868 /* Check if set features are compatible with the chosen CPU. */
869 arc_check_feature ();
870 gas_assert (cpu_flags != 0);
871 selected_cpu.eflags = (arc_initial_eflag & ~EF_ARC_MACH_MSK) | cpu_flags;
872 mach_selection_mode = sel;
873 }
874
875 /* Here ends all the ARCompact extension instruction assembling
876 stuff. */
877
878 static void
879 arc_extra_reloc (int r_type)
880 {
881 char *sym_name, c;
882 symbolS *sym, *lab = NULL;
883
884 if (*input_line_pointer == '@')
885 input_line_pointer++;
886 c = get_symbol_name (&sym_name);
887 sym = symbol_find_or_make (sym_name);
888 restore_line_pointer (c);
889 if (c == ',' && r_type == BFD_RELOC_ARC_TLS_GD_LD)
890 {
891 ++input_line_pointer;
892 char *lab_name;
893 c = get_symbol_name (&lab_name);
894 lab = symbol_find_or_make (lab_name);
895 restore_line_pointer (c);
896 }
897
898 /* These relocations exist as a mechanism for the compiler to tell the
899 linker how to patch the code if the tls model is optimised. However,
900 the relocation itself does not require any space within the assembler
901 fragment, and so we pass a size of 0.
902
903 The lines that generate these relocations look like this:
904
905 .tls_gd_ld @.tdata`bl __tls_get_addr@plt
906
907 The '.tls_gd_ld @.tdata' is processed first and generates the
908 additional relocation, while the 'bl __tls_get_addr@plt' is processed
909 second and generates the additional branch.
910
911 It is possible that the additional relocation generated by the
912 '.tls_gd_ld @.tdata' will be attached at the very end of one fragment,
913 while the 'bl __tls_get_addr@plt' will be generated as the first thing
914 in the next fragment. This will be fine; both relocations will still
915 appear to be at the same address in the generated object file.
916 However, this only works as the additional relocation is generated
917 with size of 0 bytes. */
918 fixS *fixP
919 = fix_new (frag_now, /* Which frag? */
920 frag_now_fix (), /* Where in that frag? */
921 0, /* size: 1, 2, or 4 usually. */
922 sym, /* X_add_symbol. */
923 0, /* X_add_number. */
924 FALSE, /* TRUE if PC-relative relocation. */
925 r_type /* Relocation type. */);
926 fixP->fx_subsy = lab;
927 }
928
929 static symbolS *
930 arc_lcomm_internal (int ignore ATTRIBUTE_UNUSED,
931 symbolS *symbolP, addressT size)
932 {
933 addressT align = 0;
934 SKIP_WHITESPACE ();
935
936 if (*input_line_pointer == ',')
937 {
938 align = parse_align (1);
939
940 if (align == (addressT) -1)
941 return NULL;
942 }
943 else
944 {
945 if (size >= 8)
946 align = 3;
947 else if (size >= 4)
948 align = 2;
949 else if (size >= 2)
950 align = 1;
951 else
952 align = 0;
953 }
954
955 bss_alloc (symbolP, size, align);
956 S_CLEAR_EXTERNAL (symbolP);
957
958 return symbolP;
959 }
960
961 static void
962 arc_lcomm (int ignore)
963 {
964 symbolS *symbolP = s_comm_internal (ignore, arc_lcomm_internal);
965
966 if (symbolP)
967 symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
968 }
969
970 /* Select the cpu we're assembling for. */
971
972 static void
973 arc_option (int ignore ATTRIBUTE_UNUSED)
974 {
975 char c;
976 char *cpu;
977 const char *cpu_name;
978
979 c = get_symbol_name (&cpu);
980
981 if ((!strcmp ("ARC600", cpu))
982 || (!strcmp ("ARC601", cpu))
983 || (!strcmp ("A6", cpu)))
984 cpu_name = "arc600";
985 else if ((!strcmp ("ARC700", cpu))
986 || (!strcmp ("A7", cpu)))
987 cpu_name = "arc700";
988 else if (!strcmp ("EM", cpu))
989 cpu_name = "arcem";
990 else if (!strcmp ("HS", cpu))
991 cpu_name = "archs";
992 else if (!strcmp ("NPS400", cpu))
993 cpu_name = "nps400";
994 else
995 cpu_name = NULL;
996
997 if (cpu_name != NULL)
998 arc_select_cpu (cpu_name, MACH_SELECTION_FROM_CPU_DIRECTIVE);
999 else
1000 as_fatal (_("invalid architecture `%s' in .cpu directive"), cpu);
1001
1002 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, selected_cpu.mach))
1003 as_fatal (_("could not set architecture and machine"));
1004
1005 /* Set elf header flags. */
1006 bfd_set_private_flags (stdoutput, selected_cpu.eflags);
1007
1008 restore_line_pointer (c);
1009 demand_empty_rest_of_line ();
1010 }
1011
1012 /* Smartly print an expression. */
1013
1014 static void
1015 debug_exp (expressionS *t)
1016 {
1017 const char *name ATTRIBUTE_UNUSED;
1018 const char *namemd ATTRIBUTE_UNUSED;
1019
1020 pr_debug ("debug_exp: ");
1021
1022 switch (t->X_op)
1023 {
1024 default: name = "unknown"; break;
1025 case O_illegal: name = "O_illegal"; break;
1026 case O_absent: name = "O_absent"; break;
1027 case O_constant: name = "O_constant"; break;
1028 case O_symbol: name = "O_symbol"; break;
1029 case O_symbol_rva: name = "O_symbol_rva"; break;
1030 case O_register: name = "O_register"; break;
1031 case O_big: name = "O_big"; break;
1032 case O_uminus: name = "O_uminus"; break;
1033 case O_bit_not: name = "O_bit_not"; break;
1034 case O_logical_not: name = "O_logical_not"; break;
1035 case O_multiply: name = "O_multiply"; break;
1036 case O_divide: name = "O_divide"; break;
1037 case O_modulus: name = "O_modulus"; break;
1038 case O_left_shift: name = "O_left_shift"; break;
1039 case O_right_shift: name = "O_right_shift"; break;
1040 case O_bit_inclusive_or: name = "O_bit_inclusive_or"; break;
1041 case O_bit_or_not: name = "O_bit_or_not"; break;
1042 case O_bit_exclusive_or: name = "O_bit_exclusive_or"; break;
1043 case O_bit_and: name = "O_bit_and"; break;
1044 case O_add: name = "O_add"; break;
1045 case O_subtract: name = "O_subtract"; break;
1046 case O_eq: name = "O_eq"; break;
1047 case O_ne: name = "O_ne"; break;
1048 case O_lt: name = "O_lt"; break;
1049 case O_le: name = "O_le"; break;
1050 case O_ge: name = "O_ge"; break;
1051 case O_gt: name = "O_gt"; break;
1052 case O_logical_and: name = "O_logical_and"; break;
1053 case O_logical_or: name = "O_logical_or"; break;
1054 case O_index: name = "O_index"; break;
1055 case O_bracket: name = "O_bracket"; break;
1056 case O_colon: name = "O_colon"; break;
1057 case O_addrtype: name = "O_addrtype"; break;
1058 }
1059
1060 switch (t->X_md)
1061 {
1062 default: namemd = "unknown"; break;
1063 case O_gotoff: namemd = "O_gotoff"; break;
1064 case O_gotpc: namemd = "O_gotpc"; break;
1065 case O_plt: namemd = "O_plt"; break;
1066 case O_sda: namemd = "O_sda"; break;
1067 case O_pcl: namemd = "O_pcl"; break;
1068 case O_tlsgd: namemd = "O_tlsgd"; break;
1069 case O_tlsie: namemd = "O_tlsie"; break;
1070 case O_tpoff9: namemd = "O_tpoff9"; break;
1071 case O_tpoff: namemd = "O_tpoff"; break;
1072 case O_dtpoff9: namemd = "O_dtpoff9"; break;
1073 case O_dtpoff: namemd = "O_dtpoff"; break;
1074 }
1075
1076 pr_debug ("%s (%s, %s, %d, %s)", name,
1077 (t->X_add_symbol) ? S_GET_NAME (t->X_add_symbol) : "--",
1078 (t->X_op_symbol) ? S_GET_NAME (t->X_op_symbol) : "--",
1079 (int) t->X_add_number,
1080 (t->X_md) ? namemd : "--");
1081 pr_debug ("\n");
1082 fflush (stderr);
1083 }
1084
1085 /* Parse the arguments to an opcode. */
1086
1087 static int
1088 tokenize_arguments (char *str,
1089 expressionS *tok,
1090 int ntok)
1091 {
1092 char *old_input_line_pointer;
1093 bfd_boolean saw_comma = FALSE;
1094 bfd_boolean saw_arg = FALSE;
1095 int brk_lvl = 0;
1096 int num_args = 0;
1097 int i;
1098 size_t len;
1099 const struct arc_reloc_op_tag *r;
1100 expressionS tmpE;
1101 char *reloc_name, c;
1102
1103 memset (tok, 0, sizeof (*tok) * ntok);
1104
1105 /* Save and restore input_line_pointer around this function. */
1106 old_input_line_pointer = input_line_pointer;
1107 input_line_pointer = str;
1108
1109 while (*input_line_pointer)
1110 {
1111 SKIP_WHITESPACE ();
1112 switch (*input_line_pointer)
1113 {
1114 case '\0':
1115 goto fini;
1116
1117 case ',':
1118 input_line_pointer++;
1119 if (saw_comma || !saw_arg)
1120 goto err;
1121 saw_comma = TRUE;
1122 break;
1123
1124 case '}':
1125 case ']':
1126 ++input_line_pointer;
1127 --brk_lvl;
1128 if (!saw_arg || num_args == ntok)
1129 goto err;
1130 tok->X_op = O_bracket;
1131 ++tok;
1132 ++num_args;
1133 break;
1134
1135 case '{':
1136 case '[':
1137 input_line_pointer++;
1138 if (brk_lvl || num_args == ntok)
1139 goto err;
1140 ++brk_lvl;
1141 tok->X_op = O_bracket;
1142 ++tok;
1143 ++num_args;
1144 break;
1145
1146 case ':':
1147 input_line_pointer++;
1148 if (!saw_arg || num_args == ntok)
1149 goto err;
1150 tok->X_op = O_colon;
1151 saw_arg = FALSE;
1152 ++tok;
1153 ++num_args;
1154 break;
1155
1156 case '@':
1157 /* We have labels, function names and relocations, all
1158 starting with @ symbol. Sort them out. */
1159 if ((saw_arg && !saw_comma) || num_args == ntok)
1160 goto err;
1161
1162 /* Parse @label. */
1163 tok->X_op = O_symbol;
1164 tok->X_md = O_absent;
1165 expression (tok);
1166 if (*input_line_pointer != '@')
1167 goto normalsymbol; /* This is not a relocation. */
1168
1169 relocationsym:
1170
1171 /* A relocation opernad has the following form
1172 @identifier@relocation_type. The identifier is already
1173 in tok! */
1174 if (tok->X_op != O_symbol)
1175 {
1176 as_bad (_("No valid label relocation operand"));
1177 goto err;
1178 }
1179
1180 /* Parse @relocation_type. */
1181 input_line_pointer++;
1182 c = get_symbol_name (&reloc_name);
1183 len = input_line_pointer - reloc_name;
1184 if (len == 0)
1185 {
1186 as_bad (_("No relocation operand"));
1187 goto err;
1188 }
1189
1190 /* Go through known relocation and try to find a match. */
1191 r = &arc_reloc_op[0];
1192 for (i = arc_num_reloc_op - 1; i >= 0; i--, r++)
1193 if (len == r->length
1194 && memcmp (reloc_name, r->name, len) == 0)
1195 break;
1196 if (i < 0)
1197 {
1198 as_bad (_("Unknown relocation operand: @%s"), reloc_name);
1199 goto err;
1200 }
1201
1202 *input_line_pointer = c;
1203 SKIP_WHITESPACE_AFTER_NAME ();
1204 /* Extra check for TLS: base. */
1205 if (*input_line_pointer == '@')
1206 {
1207 symbolS *base;
1208 if (tok->X_op_symbol != NULL
1209 || tok->X_op != O_symbol)
1210 {
1211 as_bad (_("Unable to parse TLS base: %s"),
1212 input_line_pointer);
1213 goto err;
1214 }
1215 input_line_pointer++;
1216 char *sym_name;
1217 c = get_symbol_name (&sym_name);
1218 base = symbol_find_or_make (sym_name);
1219 tok->X_op = O_subtract;
1220 tok->X_op_symbol = base;
1221 restore_line_pointer (c);
1222 tmpE.X_add_number = 0;
1223 }
1224 if ((*input_line_pointer != '+')
1225 && (*input_line_pointer != '-'))
1226 {
1227 tmpE.X_add_number = 0;
1228 }
1229 else
1230 {
1231 /* Parse the constant of a complex relocation expression
1232 like @identifier@reloc +/- const. */
1233 if (! r->complex_expr)
1234 {
1235 as_bad (_("@%s is not a complex relocation."), r->name);
1236 goto err;
1237 }
1238 expression (&tmpE);
1239 if (tmpE.X_op != O_constant)
1240 {
1241 as_bad (_("Bad expression: @%s + %s."),
1242 r->name, input_line_pointer);
1243 goto err;
1244 }
1245 }
1246
1247 tok->X_md = r->op;
1248 tok->X_add_number = tmpE.X_add_number;
1249
1250 debug_exp (tok);
1251
1252 saw_comma = FALSE;
1253 saw_arg = TRUE;
1254 tok++;
1255 num_args++;
1256 break;
1257
1258 case '%':
1259 /* Can be a register. */
1260 ++input_line_pointer;
1261 /* Fall through. */
1262 default:
1263
1264 if ((saw_arg && !saw_comma) || num_args == ntok)
1265 goto err;
1266
1267 tok->X_op = O_absent;
1268 tok->X_md = O_absent;
1269 expression (tok);
1270
1271 /* Legacy: There are cases when we have
1272 identifier@relocation_type, if it is the case parse the
1273 relocation type as well. */
1274 if (*input_line_pointer == '@')
1275 goto relocationsym;
1276
1277 normalsymbol:
1278 debug_exp (tok);
1279
1280 if (tok->X_op == O_illegal
1281 || tok->X_op == O_absent
1282 || num_args == ntok)
1283 goto err;
1284
1285 saw_comma = FALSE;
1286 saw_arg = TRUE;
1287 tok++;
1288 num_args++;
1289 break;
1290 }
1291 }
1292
1293 fini:
1294 if (saw_comma || brk_lvl)
1295 goto err;
1296 input_line_pointer = old_input_line_pointer;
1297
1298 return num_args;
1299
1300 err:
1301 if (brk_lvl)
1302 as_bad (_("Brackets in operand field incorrect"));
1303 else if (saw_comma)
1304 as_bad (_("extra comma"));
1305 else if (!saw_arg)
1306 as_bad (_("missing argument"));
1307 else
1308 as_bad (_("missing comma or colon"));
1309 input_line_pointer = old_input_line_pointer;
1310 return -1;
1311 }
1312
1313 /* Parse the flags to a structure. */
1314
1315 static int
1316 tokenize_flags (const char *str,
1317 struct arc_flags flags[],
1318 int nflg)
1319 {
1320 char *old_input_line_pointer;
1321 bfd_boolean saw_flg = FALSE;
1322 bfd_boolean saw_dot = FALSE;
1323 int num_flags = 0;
1324 size_t flgnamelen;
1325
1326 memset (flags, 0, sizeof (*flags) * nflg);
1327
1328 /* Save and restore input_line_pointer around this function. */
1329 old_input_line_pointer = input_line_pointer;
1330 input_line_pointer = (char *) str;
1331
1332 while (*input_line_pointer)
1333 {
1334 switch (*input_line_pointer)
1335 {
1336 case ' ':
1337 case '\0':
1338 goto fini;
1339
1340 case '.':
1341 input_line_pointer++;
1342 if (saw_dot)
1343 goto err;
1344 saw_dot = TRUE;
1345 saw_flg = FALSE;
1346 break;
1347
1348 default:
1349 if (saw_flg && !saw_dot)
1350 goto err;
1351
1352 if (num_flags >= nflg)
1353 goto err;
1354
1355 flgnamelen = strspn (input_line_pointer,
1356 "abcdefghijklmnopqrstuvwxyz0123456789");
1357 if (flgnamelen > MAX_FLAG_NAME_LENGTH)
1358 goto err;
1359
1360 memcpy (flags->name, input_line_pointer, flgnamelen);
1361
1362 input_line_pointer += flgnamelen;
1363 flags++;
1364 saw_dot = FALSE;
1365 saw_flg = TRUE;
1366 num_flags++;
1367 break;
1368 }
1369 }
1370
1371 fini:
1372 input_line_pointer = old_input_line_pointer;
1373 return num_flags;
1374
1375 err:
1376 if (saw_dot)
1377 as_bad (_("extra dot"));
1378 else if (!saw_flg)
1379 as_bad (_("unrecognized flag"));
1380 else
1381 as_bad (_("failed to parse flags"));
1382 input_line_pointer = old_input_line_pointer;
1383 return -1;
1384 }
1385
1386 /* Apply the fixups in order. */
1387
1388 static void
1389 apply_fixups (struct arc_insn *insn, fragS *fragP, int fix)
1390 {
1391 int i;
1392
1393 for (i = 0; i < insn->nfixups; i++)
1394 {
1395 struct arc_fixup *fixup = &insn->fixups[i];
1396 int size, pcrel, offset = 0;
1397
1398 /* FIXME! the reloc size is wrong in the BFD file.
1399 When it is fixed please delete me. */
1400 size = ((insn->len == 2) && !fixup->islong) ? 2 : 4;
1401
1402 if (fixup->islong)
1403 offset = insn->len;
1404
1405 /* Some fixups are only used internally, thus no howto. */
1406 if ((int) fixup->reloc == 0)
1407 as_fatal (_("Unhandled reloc type"));
1408
1409 if ((int) fixup->reloc < 0)
1410 {
1411 /* FIXME! the reloc size is wrong in the BFD file.
1412 When it is fixed please enable me.
1413 size = ((insn->len == 2 && !fixup->islong) ? 2 : 4; */
1414 pcrel = fixup->pcrel;
1415 }
1416 else
1417 {
1418 reloc_howto_type *reloc_howto =
1419 bfd_reloc_type_lookup (stdoutput,
1420 (bfd_reloc_code_real_type) fixup->reloc);
1421 gas_assert (reloc_howto);
1422
1423 /* FIXME! the reloc size is wrong in the BFD file.
1424 When it is fixed please enable me.
1425 size = bfd_get_reloc_size (reloc_howto); */
1426 pcrel = reloc_howto->pc_relative;
1427 }
1428
1429 pr_debug ("%s:%d: apply_fixups: new %s fixup (PCrel:%s) of size %d @ \
1430 offset %d + %d\n",
1431 fragP->fr_file, fragP->fr_line,
1432 (fixup->reloc < 0) ? "Internal" :
1433 bfd_get_reloc_code_name (fixup->reloc),
1434 pcrel ? "Y" : "N",
1435 size, fix, offset);
1436 fix_new_exp (fragP, fix + offset,
1437 size, &fixup->exp, pcrel, fixup->reloc);
1438
1439 /* Check for ZOLs, and update symbol info if any. */
1440 if (LP_INSN (insn->insn))
1441 {
1442 gas_assert (fixup->exp.X_add_symbol);
1443 ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL);
1444 }
1445 }
1446 }
1447
1448 /* Actually output an instruction with its fixup. */
1449
1450 static void
1451 emit_insn0 (struct arc_insn *insn, char *where, bfd_boolean relax)
1452 {
1453 char *f = where;
1454 size_t total_len;
1455
1456 pr_debug ("Emit insn : 0x%llx\n", insn->insn);
1457 pr_debug ("\tLength : 0x%d\n", insn->len);
1458 pr_debug ("\tLong imm: 0x%lx\n", insn->limm);
1459
1460 /* Write out the instruction. */
1461 total_len = insn->len + (insn->has_limm ? 4 : 0);
1462 if (!relax)
1463 f = frag_more (total_len);
1464
1465 md_number_to_chars_midend(f, insn->insn, insn->len);
1466
1467 if (insn->has_limm)
1468 md_number_to_chars_midend (f + insn->len, insn->limm, 4);
1469 dwarf2_emit_insn (total_len);
1470
1471 if (!relax)
1472 apply_fixups (insn, frag_now, (f - frag_now->fr_literal));
1473 }
1474
1475 static void
1476 emit_insn1 (struct arc_insn *insn)
1477 {
1478 /* How frag_var's args are currently configured:
1479 - rs_machine_dependent, to dictate it's a relaxation frag.
1480 - FRAG_MAX_GROWTH, maximum size of instruction
1481 - 0, variable size that might grow...unused by generic relaxation.
1482 - frag_now->fr_subtype, fr_subtype starting value, set previously.
1483 - s, opand expression.
1484 - 0, offset but it's unused.
1485 - 0, opcode but it's unused. */
1486 symbolS *s = make_expr_symbol (&insn->fixups[0].exp);
1487 frag_now->tc_frag_data.pcrel = insn->fixups[0].pcrel;
1488
1489 if (frag_room () < FRAG_MAX_GROWTH)
1490 {
1491 /* Handle differently when frag literal memory is exhausted.
1492 This is used because when there's not enough memory left in
1493 the current frag, a new frag is created and the information
1494 we put into frag_now->tc_frag_data is disregarded. */
1495
1496 struct arc_relax_type relax_info_copy;
1497 relax_substateT subtype = frag_now->fr_subtype;
1498
1499 memcpy (&relax_info_copy, &frag_now->tc_frag_data,
1500 sizeof (struct arc_relax_type));
1501
1502 frag_wane (frag_now);
1503 frag_grow (FRAG_MAX_GROWTH);
1504
1505 memcpy (&frag_now->tc_frag_data, &relax_info_copy,
1506 sizeof (struct arc_relax_type));
1507
1508 frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
1509 subtype, s, 0, 0);
1510 }
1511 else
1512 frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
1513 frag_now->fr_subtype, s, 0, 0);
1514 }
1515
1516 static void
1517 emit_insn (struct arc_insn *insn)
1518 {
1519 if (insn->relax)
1520 emit_insn1 (insn);
1521 else
1522 emit_insn0 (insn, NULL, FALSE);
1523 }
1524
1525 /* Check whether a symbol involves a register. */
1526
1527 static bfd_boolean
1528 contains_register (symbolS *sym)
1529 {
1530 if (sym)
1531 {
1532 expressionS *ex = symbol_get_value_expression (sym);
1533
1534 return ((O_register == ex->X_op)
1535 && !contains_register (ex->X_add_symbol)
1536 && !contains_register (ex->X_op_symbol));
1537 }
1538
1539 return FALSE;
1540 }
1541
1542 /* Returns the register number within a symbol. */
1543
1544 static int
1545 get_register (symbolS *sym)
1546 {
1547 if (!contains_register (sym))
1548 return -1;
1549
1550 expressionS *ex = symbol_get_value_expression (sym);
1551 return regno (ex->X_add_number);
1552 }
1553
1554 /* Return true if a RELOC is generic. A generic reloc is PC-rel of a
1555 simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */
1556
1557 static bfd_boolean
1558 generic_reloc_p (extended_bfd_reloc_code_real_type reloc)
1559 {
1560 if (!reloc)
1561 return FALSE;
1562
1563 switch (reloc)
1564 {
1565 case BFD_RELOC_ARC_SDA_LDST:
1566 case BFD_RELOC_ARC_SDA_LDST1:
1567 case BFD_RELOC_ARC_SDA_LDST2:
1568 case BFD_RELOC_ARC_SDA16_LD:
1569 case BFD_RELOC_ARC_SDA16_LD1:
1570 case BFD_RELOC_ARC_SDA16_LD2:
1571 case BFD_RELOC_ARC_SDA16_ST2:
1572 case BFD_RELOC_ARC_SDA32_ME:
1573 return FALSE;
1574 default:
1575 return TRUE;
1576 }
1577 }
1578
1579 /* Allocates a tok entry. */
1580
1581 static int
1582 allocate_tok (expressionS *tok, int ntok, int cidx)
1583 {
1584 if (ntok > MAX_INSN_ARGS - 2)
1585 return 0; /* No space left. */
1586
1587 if (cidx > ntok)
1588 return 0; /* Incorect args. */
1589
1590 memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok));
1591
1592 if (cidx == ntok)
1593 return 1; /* Success. */
1594 return allocate_tok (tok, ntok - 1, cidx);
1595 }
1596
1597 /* Check if an particular ARC feature is enabled. */
1598
1599 static bfd_boolean
1600 check_cpu_feature (insn_subclass_t sc)
1601 {
1602 if (is_code_density_p (sc) && !(selected_cpu.features & ARC_CD))
1603 return FALSE;
1604
1605 if (is_spfp_p (sc) && !(selected_cpu.features & ARC_SPFP))
1606 return FALSE;
1607
1608 if (is_dpfp_p (sc) && !(selected_cpu.features & ARC_DPFP))
1609 return FALSE;
1610
1611 if (is_fpuda_p (sc) && !(selected_cpu.features & ARC_FPUDA))
1612 return FALSE;
1613
1614 if (is_nps400_p (sc) && !(selected_cpu.features & ARC_NPS400))
1615 return FALSE;
1616
1617 return TRUE;
1618 }
1619
1620 /* Parse the flags described by FIRST_PFLAG and NFLGS against the flag
1621 operands in OPCODE. Stores the matching OPCODES into the FIRST_PFLAG
1622 array and returns TRUE if the flag operands all match, otherwise,
1623 returns FALSE, in which case the FIRST_PFLAG array may have been
1624 modified. */
1625
1626 static bfd_boolean
1627 parse_opcode_flags (const struct arc_opcode *opcode,
1628 int nflgs,
1629 struct arc_flags *first_pflag)
1630 {
1631 int lnflg, i;
1632 const unsigned char *flgidx;
1633
1634 lnflg = nflgs;
1635 for (i = 0; i < nflgs; i++)
1636 first_pflag[i].flgp = NULL;
1637
1638 /* Check the flags. Iterate over the valid flag classes. */
1639 for (flgidx = opcode->flags; *flgidx; ++flgidx)
1640 {
1641 /* Get a valid flag class. */
1642 const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
1643 const unsigned *flgopridx;
1644 int cl_matches = 0;
1645 struct arc_flags *pflag = NULL;
1646
1647 /* Check for extension conditional codes. */
1648 if (ext_condcode.arc_ext_condcode
1649 && cl_flags->flag_class & F_CLASS_EXTEND)
1650 {
1651 struct arc_flag_operand *pf = ext_condcode.arc_ext_condcode;
1652 while (pf->name)
1653 {
1654 pflag = first_pflag;
1655 for (i = 0; i < nflgs; i++, pflag++)
1656 {
1657 if (!strcmp (pf->name, pflag->name))
1658 {
1659 if (pflag->flgp != NULL)
1660 return FALSE;
1661 /* Found it. */
1662 cl_matches++;
1663 pflag->flgp = pf;
1664 lnflg--;
1665 break;
1666 }
1667 }
1668 pf++;
1669 }
1670 }
1671
1672 for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
1673 {
1674 const struct arc_flag_operand *flg_operand;
1675
1676 pflag = first_pflag;
1677 flg_operand = &arc_flag_operands[*flgopridx];
1678 for (i = 0; i < nflgs; i++, pflag++)
1679 {
1680 /* Match against the parsed flags. */
1681 if (!strcmp (flg_operand->name, pflag->name))
1682 {
1683 if (pflag->flgp != NULL)
1684 return FALSE;
1685 cl_matches++;
1686 pflag->flgp = flg_operand;
1687 lnflg--;
1688 break; /* goto next flag class and parsed flag. */
1689 }
1690 }
1691 }
1692
1693 if ((cl_flags->flag_class & F_CLASS_REQUIRED) && cl_matches == 0)
1694 return FALSE;
1695 if ((cl_flags->flag_class & F_CLASS_OPTIONAL) && cl_matches > 1)
1696 return FALSE;
1697 }
1698
1699 /* Did I check all the parsed flags? */
1700 return lnflg ? FALSE : TRUE;
1701 }
1702
1703
1704 /* Search forward through all variants of an opcode looking for a
1705 syntax match. */
1706
1707 static const struct arc_opcode *
1708 find_opcode_match (const struct arc_opcode_hash_entry *entry,
1709 expressionS *tok,
1710 int *pntok,
1711 struct arc_flags *first_pflag,
1712 int nflgs,
1713 int *pcpumatch,
1714 const char **errmsg)
1715 {
1716 const struct arc_opcode *opcode;
1717 struct arc_opcode_hash_entry_iterator iter;
1718 int ntok = *pntok;
1719 int got_cpu_match = 0;
1720 expressionS bktok[MAX_INSN_ARGS];
1721 int bkntok;
1722 expressionS emptyE;
1723
1724 arc_opcode_hash_entry_iterator_init (&iter);
1725 memset (&emptyE, 0, sizeof (emptyE));
1726 memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok));
1727 bkntok = ntok;
1728
1729 for (opcode = arc_opcode_hash_entry_iterator_next (entry, &iter);
1730 opcode != NULL;
1731 opcode = arc_opcode_hash_entry_iterator_next (entry, &iter))
1732 {
1733 const unsigned char *opidx;
1734 int tokidx = 0;
1735 const expressionS *t = &emptyE;
1736
1737 pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08llX ",
1738 frag_now->fr_file, frag_now->fr_line, opcode->opcode);
1739
1740 /* Don't match opcodes that don't exist on this
1741 architecture. */
1742 if (!(opcode->cpu & selected_cpu.flags))
1743 goto match_failed;
1744
1745 if (!check_cpu_feature (opcode->subclass))
1746 goto match_failed;
1747
1748 got_cpu_match = 1;
1749 pr_debug ("cpu ");
1750
1751 /* Check the operands. */
1752 for (opidx = opcode->operands; *opidx; ++opidx)
1753 {
1754 const struct arc_operand *operand = &arc_operands[*opidx];
1755
1756 /* Only take input from real operands. */
1757 if (ARC_OPERAND_IS_FAKE (operand))
1758 continue;
1759
1760 /* When we expect input, make sure we have it. */
1761 if (tokidx >= ntok)
1762 goto match_failed;
1763
1764 /* Match operand type with expression type. */
1765 switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
1766 {
1767 case ARC_OPERAND_ADDRTYPE:
1768 {
1769 *errmsg = NULL;
1770
1771 /* Check to be an address type. */
1772 if (tok[tokidx].X_op != O_addrtype)
1773 goto match_failed;
1774
1775 /* All address type operands need to have an insert
1776 method in order to check that we have the correct
1777 address type. */
1778 gas_assert (operand->insert != NULL);
1779 (*operand->insert) (0, tok[tokidx].X_add_number,
1780 errmsg);
1781 if (*errmsg != NULL)
1782 goto match_failed;
1783 }
1784 break;
1785
1786 case ARC_OPERAND_IR:
1787 /* Check to be a register. */
1788 if ((tok[tokidx].X_op != O_register
1789 || !is_ir_num (tok[tokidx].X_add_number))
1790 && !(operand->flags & ARC_OPERAND_IGNORE))
1791 goto match_failed;
1792
1793 /* If expect duplicate, make sure it is duplicate. */
1794 if (operand->flags & ARC_OPERAND_DUPLICATE)
1795 {
1796 /* Check for duplicate. */
1797 if (t->X_op != O_register
1798 || !is_ir_num (t->X_add_number)
1799 || (regno (t->X_add_number) !=
1800 regno (tok[tokidx].X_add_number)))
1801 goto match_failed;
1802 }
1803
1804 /* Special handling? */
1805 if (operand->insert)
1806 {
1807 *errmsg = NULL;
1808 (*operand->insert)(0,
1809 regno (tok[tokidx].X_add_number),
1810 errmsg);
1811 if (*errmsg)
1812 {
1813 if (operand->flags & ARC_OPERAND_IGNORE)
1814 {
1815 /* Missing argument, create one. */
1816 if (!allocate_tok (tok, ntok - 1, tokidx))
1817 goto match_failed;
1818
1819 tok[tokidx].X_op = O_absent;
1820 ++ntok;
1821 }
1822 else
1823 goto match_failed;
1824 }
1825 }
1826
1827 t = &tok[tokidx];
1828 break;
1829
1830 case ARC_OPERAND_BRAKET:
1831 /* Check if bracket is also in opcode table as
1832 operand. */
1833 if (tok[tokidx].X_op != O_bracket)
1834 goto match_failed;
1835 break;
1836
1837 case ARC_OPERAND_COLON:
1838 /* Check if colon is also in opcode table as operand. */
1839 if (tok[tokidx].X_op != O_colon)
1840 goto match_failed;
1841 break;
1842
1843 case ARC_OPERAND_LIMM:
1844 case ARC_OPERAND_SIGNED:
1845 case ARC_OPERAND_UNSIGNED:
1846 switch (tok[tokidx].X_op)
1847 {
1848 case O_illegal:
1849 case O_absent:
1850 case O_register:
1851 goto match_failed;
1852
1853 case O_bracket:
1854 /* Got an (too) early bracket, check if it is an
1855 ignored operand. N.B. This procedure works only
1856 when bracket is the last operand! */
1857 if (!(operand->flags & ARC_OPERAND_IGNORE))
1858 goto match_failed;
1859 /* Insert the missing operand. */
1860 if (!allocate_tok (tok, ntok - 1, tokidx))
1861 goto match_failed;
1862
1863 tok[tokidx].X_op = O_absent;
1864 ++ntok;
1865 break;
1866
1867 case O_symbol:
1868 {
1869 const char *p;
1870 const struct arc_aux_reg *auxr;
1871
1872 if (opcode->insn_class != AUXREG)
1873 goto de_fault;
1874 p = S_GET_NAME (tok[tokidx].X_add_symbol);
1875
1876 auxr = hash_find (arc_aux_hash, p);
1877 if (auxr)
1878 {
1879 /* We modify the token array here, safe in the
1880 knowledge, that if this was the wrong
1881 choice then the original contents will be
1882 restored from BKTOK. */
1883 tok[tokidx].X_op = O_constant;
1884 tok[tokidx].X_add_number = auxr->address;
1885 ARC_SET_FLAG (tok[tokidx].X_add_symbol, ARC_FLAG_AUX);
1886 }
1887
1888 if (tok[tokidx].X_op != O_constant)
1889 goto de_fault;
1890 }
1891 /* Fall through. */
1892 case O_constant:
1893 /* Check the range. */
1894 if (operand->bits != 32
1895 && !(operand->flags & ARC_OPERAND_NCHK))
1896 {
1897 offsetT min, max, val;
1898 val = tok[tokidx].X_add_number;
1899
1900 if (operand->flags & ARC_OPERAND_SIGNED)
1901 {
1902 max = (1 << (operand->bits - 1)) - 1;
1903 min = -(1 << (operand->bits - 1));
1904 }
1905 else
1906 {
1907 max = (1 << operand->bits) - 1;
1908 min = 0;
1909 }
1910
1911 if (val < min || val > max)
1912 goto match_failed;
1913
1914 /* Check alignmets. */
1915 if ((operand->flags & ARC_OPERAND_ALIGNED32)
1916 && (val & 0x03))
1917 goto match_failed;
1918
1919 if ((operand->flags & ARC_OPERAND_ALIGNED16)
1920 && (val & 0x01))
1921 goto match_failed;
1922 }
1923 else if (operand->flags & ARC_OPERAND_NCHK)
1924 {
1925 if (operand->insert)
1926 {
1927 *errmsg = NULL;
1928 (*operand->insert)(0,
1929 tok[tokidx].X_add_number,
1930 errmsg);
1931 if (*errmsg)
1932 goto match_failed;
1933 }
1934 else if (!(operand->flags & ARC_OPERAND_IGNORE))
1935 goto match_failed;
1936 }
1937 break;
1938
1939 case O_subtract:
1940 /* Check if it is register range. */
1941 if ((tok[tokidx].X_add_number == 0)
1942 && contains_register (tok[tokidx].X_add_symbol)
1943 && contains_register (tok[tokidx].X_op_symbol))
1944 {
1945 int regs;
1946
1947 regs = get_register (tok[tokidx].X_add_symbol);
1948 regs <<= 16;
1949 regs |= get_register (tok[tokidx].X_op_symbol);
1950 if (operand->insert)
1951 {
1952 *errmsg = NULL;
1953 (*operand->insert)(0,
1954 regs,
1955 errmsg);
1956 if (*errmsg)
1957 goto match_failed;
1958 }
1959 else
1960 goto match_failed;
1961 break;
1962 }
1963 /* Fall through. */
1964 default:
1965 de_fault:
1966 if (operand->default_reloc == 0)
1967 goto match_failed; /* The operand needs relocation. */
1968
1969 /* Relocs requiring long immediate. FIXME! make it
1970 generic and move it to a function. */
1971 switch (tok[tokidx].X_md)
1972 {
1973 case O_gotoff:
1974 case O_gotpc:
1975 case O_pcl:
1976 case O_tpoff:
1977 case O_dtpoff:
1978 case O_tlsgd:
1979 case O_tlsie:
1980 if (!(operand->flags & ARC_OPERAND_LIMM))
1981 goto match_failed;
1982 /* Fall through. */
1983 case O_absent:
1984 if (!generic_reloc_p (operand->default_reloc))
1985 goto match_failed;
1986 break;
1987 default:
1988 break;
1989 }
1990 break;
1991 }
1992 /* If expect duplicate, make sure it is duplicate. */
1993 if (operand->flags & ARC_OPERAND_DUPLICATE)
1994 {
1995 if (t->X_op == O_illegal
1996 || t->X_op == O_absent
1997 || t->X_op == O_register
1998 || (t->X_add_number != tok[tokidx].X_add_number))
1999 goto match_failed;
2000 }
2001 t = &tok[tokidx];
2002 break;
2003
2004 default:
2005 /* Everything else should have been fake. */
2006 abort ();
2007 }
2008
2009 ++tokidx;
2010 }
2011 pr_debug ("opr ");
2012
2013 /* Setup ready for flag parsing. */
2014 if (!parse_opcode_flags (opcode, nflgs, first_pflag))
2015 goto match_failed;
2016
2017 pr_debug ("flg");
2018 /* Possible match -- did we use all of our input? */
2019 if (tokidx == ntok)
2020 {
2021 *pntok = ntok;
2022 pr_debug ("\n");
2023 return opcode;
2024 }
2025
2026 match_failed:;
2027 pr_debug ("\n");
2028 /* Restore the original parameters. */
2029 memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok));
2030 ntok = bkntok;
2031 }
2032
2033 if (*pcpumatch)
2034 *pcpumatch = got_cpu_match;
2035
2036 return NULL;
2037 }
2038
2039 /* Swap operand tokens. */
2040
2041 static void
2042 swap_operand (expressionS *operand_array,
2043 unsigned source,
2044 unsigned destination)
2045 {
2046 expressionS cpy_operand;
2047 expressionS *src_operand;
2048 expressionS *dst_operand;
2049 size_t size;
2050
2051 if (source == destination)
2052 return;
2053
2054 src_operand = &operand_array[source];
2055 dst_operand = &operand_array[destination];
2056 size = sizeof (expressionS);
2057
2058 /* Make copy of operand to swap with and swap. */
2059 memcpy (&cpy_operand, dst_operand, size);
2060 memcpy (dst_operand, src_operand, size);
2061 memcpy (src_operand, &cpy_operand, size);
2062 }
2063
2064 /* Check if *op matches *tok type.
2065 Returns FALSE if they don't match, TRUE if they match. */
2066
2067 static bfd_boolean
2068 pseudo_operand_match (const expressionS *tok,
2069 const struct arc_operand_operation *op)
2070 {
2071 offsetT min, max, val;
2072 bfd_boolean ret;
2073 const struct arc_operand *operand_real = &arc_operands[op->operand_idx];
2074
2075 ret = FALSE;
2076 switch (tok->X_op)
2077 {
2078 case O_constant:
2079 if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM))
2080 ret = 1;
2081 else if (!(operand_real->flags & ARC_OPERAND_IR))
2082 {
2083 val = tok->X_add_number + op->count;
2084 if (operand_real->flags & ARC_OPERAND_SIGNED)
2085 {
2086 max = (1 << (operand_real->bits - 1)) - 1;
2087 min = -(1 << (operand_real->bits - 1));
2088 }
2089 else
2090 {
2091 max = (1 << operand_real->bits) - 1;
2092 min = 0;
2093 }
2094 if (min <= val && val <= max)
2095 ret = TRUE;
2096 }
2097 break;
2098
2099 case O_symbol:
2100 /* Handle all symbols as long immediates or signed 9. */
2101 if (operand_real->flags & ARC_OPERAND_LIMM
2102 || ((operand_real->flags & ARC_OPERAND_SIGNED)
2103 && operand_real->bits == 9))
2104 ret = TRUE;
2105 break;
2106
2107 case O_register:
2108 if (operand_real->flags & ARC_OPERAND_IR)
2109 ret = TRUE;
2110 break;
2111
2112 case O_bracket:
2113 if (operand_real->flags & ARC_OPERAND_BRAKET)
2114 ret = TRUE;
2115 break;
2116
2117 default:
2118 /* Unknown. */
2119 break;
2120 }
2121 return ret;
2122 }
2123
2124 /* Find pseudo instruction in array. */
2125
2126 static const struct arc_pseudo_insn *
2127 find_pseudo_insn (const char *opname,
2128 int ntok,
2129 const expressionS *tok)
2130 {
2131 const struct arc_pseudo_insn *pseudo_insn = NULL;
2132 const struct arc_operand_operation *op;
2133 unsigned int i;
2134 int j;
2135
2136 for (i = 0; i < arc_num_pseudo_insn; ++i)
2137 {
2138 pseudo_insn = &arc_pseudo_insns[i];
2139 if (strcmp (pseudo_insn->mnemonic_p, opname) == 0)
2140 {
2141 op = pseudo_insn->operand;
2142 for (j = 0; j < ntok; ++j)
2143 if (!pseudo_operand_match (&tok[j], &op[j]))
2144 break;
2145
2146 /* Found the right instruction. */
2147 if (j == ntok)
2148 return pseudo_insn;
2149 }
2150 }
2151 return NULL;
2152 }
2153
2154 /* Assumes the expressionS *tok is of sufficient size. */
2155
2156 static const struct arc_opcode_hash_entry *
2157 find_special_case_pseudo (const char *opname,
2158 int *ntok,
2159 expressionS *tok,
2160 int *nflgs,
2161 struct arc_flags *pflags)
2162 {
2163 const struct arc_pseudo_insn *pseudo_insn = NULL;
2164 const struct arc_operand_operation *operand_pseudo;
2165 const struct arc_operand *operand_real;
2166 unsigned i;
2167 char construct_operand[MAX_CONSTR_STR];
2168
2169 /* Find whether opname is in pseudo instruction array. */
2170 pseudo_insn = find_pseudo_insn (opname, *ntok, tok);
2171
2172 if (pseudo_insn == NULL)
2173 return NULL;
2174
2175 /* Handle flag, Limited to one flag at the moment. */
2176 if (pseudo_insn->flag_r != NULL)
2177 *nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs],
2178 MAX_INSN_FLGS - *nflgs);
2179
2180 /* Handle operand operations. */
2181 for (i = 0; i < pseudo_insn->operand_cnt; ++i)
2182 {
2183 operand_pseudo = &pseudo_insn->operand[i];
2184 operand_real = &arc_operands[operand_pseudo->operand_idx];
2185
2186 if (operand_real->flags & ARC_OPERAND_BRAKET
2187 && !operand_pseudo->needs_insert)
2188 continue;
2189
2190 /* Has to be inserted (i.e. this token does not exist yet). */
2191 if (operand_pseudo->needs_insert)
2192 {
2193 if (operand_real->flags & ARC_OPERAND_BRAKET)
2194 {
2195 tok[i].X_op = O_bracket;
2196 ++(*ntok);
2197 continue;
2198 }
2199
2200 /* Check if operand is a register or constant and handle it
2201 by type. */
2202 if (operand_real->flags & ARC_OPERAND_IR)
2203 snprintf (construct_operand, MAX_CONSTR_STR, "r%d",
2204 operand_pseudo->count);
2205 else
2206 snprintf (construct_operand, MAX_CONSTR_STR, "%d",
2207 operand_pseudo->count);
2208
2209 tokenize_arguments (construct_operand, &tok[i], 1);
2210 ++(*ntok);
2211 }
2212
2213 else if (operand_pseudo->count)
2214 {
2215 /* Operand number has to be adjusted accordingly (by operand
2216 type). */
2217 switch (tok[i].X_op)
2218 {
2219 case O_constant:
2220 tok[i].X_add_number += operand_pseudo->count;
2221 break;
2222
2223 case O_symbol:
2224 break;
2225
2226 default:
2227 /* Ignored. */
2228 break;
2229 }
2230 }
2231 }
2232
2233 /* Swap operands if necessary. Only supports one swap at the
2234 moment. */
2235 for (i = 0; i < pseudo_insn->operand_cnt; ++i)
2236 {
2237 operand_pseudo = &pseudo_insn->operand[i];
2238
2239 if (operand_pseudo->swap_operand_idx == i)
2240 continue;
2241
2242 swap_operand (tok, i, operand_pseudo->swap_operand_idx);
2243
2244 /* Prevent a swap back later by breaking out. */
2245 break;
2246 }
2247
2248 return arc_find_opcode (pseudo_insn->mnemonic_r);
2249 }
2250
2251 static const struct arc_opcode_hash_entry *
2252 find_special_case_flag (const char *opname,
2253 int *nflgs,
2254 struct arc_flags *pflags)
2255 {
2256 unsigned int i;
2257 const char *flagnm;
2258 unsigned flag_idx, flag_arr_idx;
2259 size_t flaglen, oplen;
2260 const struct arc_flag_special *arc_flag_special_opcode;
2261 const struct arc_opcode_hash_entry *entry;
2262
2263 /* Search for special case instruction. */
2264 for (i = 0; i < arc_num_flag_special; i++)
2265 {
2266 arc_flag_special_opcode = &arc_flag_special_cases[i];
2267 oplen = strlen (arc_flag_special_opcode->name);
2268
2269 if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0)
2270 continue;
2271
2272 /* Found a potential special case instruction, now test for
2273 flags. */
2274 for (flag_arr_idx = 0;; ++flag_arr_idx)
2275 {
2276 flag_idx = arc_flag_special_opcode->flags[flag_arr_idx];
2277 if (flag_idx == 0)
2278 break; /* End of array, nothing found. */
2279
2280 flagnm = arc_flag_operands[flag_idx].name;
2281 flaglen = strlen (flagnm);
2282 if (strcmp (opname + oplen, flagnm) == 0)
2283 {
2284 entry = arc_find_opcode (arc_flag_special_opcode->name);
2285
2286 if (*nflgs + 1 > MAX_INSN_FLGS)
2287 break;
2288 memcpy (pflags[*nflgs].name, flagnm, flaglen);
2289 pflags[*nflgs].name[flaglen] = '\0';
2290 (*nflgs)++;
2291 return entry;
2292 }
2293 }
2294 }
2295 return NULL;
2296 }
2297
2298 /* Used to find special case opcode. */
2299
2300 static const struct arc_opcode_hash_entry *
2301 find_special_case (const char *opname,
2302 int *nflgs,
2303 struct arc_flags *pflags,
2304 expressionS *tok,
2305 int *ntok)
2306 {
2307 const struct arc_opcode_hash_entry *entry;
2308
2309 entry = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags);
2310
2311 if (entry == NULL)
2312 entry = find_special_case_flag (opname, nflgs, pflags);
2313
2314 return entry;
2315 }
2316
2317 /* Given an opcode name, pre-tockenized set of argumenst and the
2318 opcode flags, take it all the way through emission. */
2319
2320 static void
2321 assemble_tokens (const char *opname,
2322 expressionS *tok,
2323 int ntok,
2324 struct arc_flags *pflags,
2325 int nflgs)
2326 {
2327 bfd_boolean found_something = FALSE;
2328 const struct arc_opcode_hash_entry *entry;
2329 int cpumatch = 1;
2330 const char *errmsg = NULL;
2331
2332 /* Search opcodes. */
2333 entry = arc_find_opcode (opname);
2334
2335 /* Couldn't find opcode conventional way, try special cases. */
2336 if (entry == NULL)
2337 entry = find_special_case (opname, &nflgs, pflags, tok, &ntok);
2338
2339 if (entry != NULL)
2340 {
2341 const struct arc_opcode *opcode;
2342
2343 pr_debug ("%s:%d: assemble_tokens: %s\n",
2344 frag_now->fr_file, frag_now->fr_line, opname);
2345 found_something = TRUE;
2346 opcode = find_opcode_match (entry, tok, &ntok, pflags,
2347 nflgs, &cpumatch, &errmsg);
2348 if (opcode != NULL)
2349 {
2350 struct arc_insn insn;
2351
2352 assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn);
2353 emit_insn (&insn);
2354 return;
2355 }
2356 }
2357
2358 if (found_something)
2359 {
2360 if (cpumatch)
2361 if (errmsg)
2362 as_bad (_("%s for instruction '%s'"), errmsg, opname);
2363 else
2364 as_bad (_("inappropriate arguments for opcode '%s'"), opname);
2365 else
2366 as_bad (_("opcode '%s' not supported for target %s"), opname,
2367 selected_cpu.name);
2368 }
2369 else
2370 as_bad (_("unknown opcode '%s'"), opname);
2371 }
2372
2373 /* The public interface to the instruction assembler. */
2374
2375 void
2376 md_assemble (char *str)
2377 {
2378 char *opname;
2379 expressionS tok[MAX_INSN_ARGS];
2380 int ntok, nflg;
2381 size_t opnamelen;
2382 struct arc_flags flags[MAX_INSN_FLGS];
2383
2384 /* Split off the opcode. */
2385 opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468");
2386 opname = xmemdup0 (str, opnamelen);
2387
2388 /* Signalize we are assmbling the instructions. */
2389 assembling_insn = TRUE;
2390
2391 /* Tokenize the flags. */
2392 if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1)
2393 {
2394 as_bad (_("syntax error"));
2395 return;
2396 }
2397
2398 /* Scan up to the end of the mnemonic which must end in space or end
2399 of string. */
2400 str += opnamelen;
2401 for (; *str != '\0'; str++)
2402 if (*str == ' ')
2403 break;
2404
2405 /* Tokenize the rest of the line. */
2406 if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0)
2407 {
2408 as_bad (_("syntax error"));
2409 return;
2410 }
2411
2412 /* Finish it off. */
2413 assemble_tokens (opname, tok, ntok, flags, nflg);
2414 assembling_insn = FALSE;
2415 }
2416
2417 /* Callback to insert a register into the hash table. */
2418
2419 static void
2420 declare_register (const char *name, int number)
2421 {
2422 const char *err;
2423 symbolS *regS = symbol_create (name, reg_section,
2424 number, &zero_address_frag);
2425
2426 err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS);
2427 if (err)
2428 as_fatal (_("Inserting \"%s\" into register table failed: %s"),
2429 name, err);
2430 }
2431
2432 /* Construct symbols for each of the general registers. */
2433
2434 static void
2435 declare_register_set (void)
2436 {
2437 int i;
2438 for (i = 0; i < 64; ++i)
2439 {
2440 char name[7];
2441
2442 sprintf (name, "r%d", i);
2443 declare_register (name, i);
2444 if ((i & 0x01) == 0)
2445 {
2446 sprintf (name, "r%dr%d", i, i+1);
2447 declare_register (name, i);
2448 }
2449 }
2450 }
2451
2452 /* Construct a symbol for an address type. */
2453
2454 static void
2455 declare_addrtype (const char *name, int number)
2456 {
2457 const char *err;
2458 symbolS *addrtypeS = symbol_create (name, undefined_section,
2459 number, &zero_address_frag);
2460
2461 err = hash_insert (arc_addrtype_hash, S_GET_NAME (addrtypeS),
2462 (void *) addrtypeS);
2463 if (err)
2464 as_fatal (_("Inserting \"%s\" into address type table failed: %s"),
2465 name, err);
2466 }
2467
2468 /* Port-specific assembler initialization. This function is called
2469 once, at assembler startup time. */
2470
2471 void
2472 md_begin (void)
2473 {
2474 const struct arc_opcode *opcode = arc_opcodes;
2475
2476 if (mach_selection_mode == MACH_SELECTION_NONE)
2477 arc_select_cpu (TARGET_WITH_CPU, MACH_SELECTION_FROM_DEFAULT);
2478
2479 /* The endianness can be chosen "at the factory". */
2480 target_big_endian = byte_order == BIG_ENDIAN;
2481
2482 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, selected_cpu.mach))
2483 as_warn (_("could not set architecture and machine"));
2484
2485 /* Set elf header flags. */
2486 bfd_set_private_flags (stdoutput, selected_cpu.eflags);
2487
2488 /* Set up a hash table for the instructions. */
2489 arc_opcode_hash = hash_new ();
2490 if (arc_opcode_hash == NULL)
2491 as_fatal (_("Virtual memory exhausted"));
2492
2493 /* Initialize the hash table with the insns. */
2494 do
2495 {
2496 const char *name = opcode->name;
2497
2498 arc_insert_opcode (opcode);
2499
2500 while (++opcode && opcode->name
2501 && (opcode->name == name
2502 || !strcmp (opcode->name, name)))
2503 continue;
2504 }while (opcode->name);
2505
2506 /* Register declaration. */
2507 arc_reg_hash = hash_new ();
2508 if (arc_reg_hash == NULL)
2509 as_fatal (_("Virtual memory exhausted"));
2510
2511 declare_register_set ();
2512 declare_register ("gp", 26);
2513 declare_register ("fp", 27);
2514 declare_register ("sp", 28);
2515 declare_register ("ilink", 29);
2516 declare_register ("ilink1", 29);
2517 declare_register ("ilink2", 30);
2518 declare_register ("blink", 31);
2519
2520 /* XY memory registers. */
2521 declare_register ("x0_u0", 32);
2522 declare_register ("x0_u1", 33);
2523 declare_register ("x1_u0", 34);
2524 declare_register ("x1_u1", 35);
2525 declare_register ("x2_u0", 36);
2526 declare_register ("x2_u1", 37);
2527 declare_register ("x3_u0", 38);
2528 declare_register ("x3_u1", 39);
2529 declare_register ("y0_u0", 40);
2530 declare_register ("y0_u1", 41);
2531 declare_register ("y1_u0", 42);
2532 declare_register ("y1_u1", 43);
2533 declare_register ("y2_u0", 44);
2534 declare_register ("y2_u1", 45);
2535 declare_register ("y3_u0", 46);
2536 declare_register ("y3_u1", 47);
2537 declare_register ("x0_nu", 48);
2538 declare_register ("x1_nu", 49);
2539 declare_register ("x2_nu", 50);
2540 declare_register ("x3_nu", 51);
2541 declare_register ("y0_nu", 52);
2542 declare_register ("y1_nu", 53);
2543 declare_register ("y2_nu", 54);
2544 declare_register ("y3_nu", 55);
2545
2546 declare_register ("mlo", 57);
2547 declare_register ("mmid", 58);
2548 declare_register ("mhi", 59);
2549
2550 declare_register ("acc1", 56);
2551 declare_register ("acc2", 57);
2552
2553 declare_register ("lp_count", 60);
2554 declare_register ("pcl", 63);
2555
2556 /* Initialize the last instructions. */
2557 memset (&arc_last_insns[0], 0, sizeof (arc_last_insns));
2558
2559 /* Aux register declaration. */
2560 arc_aux_hash = hash_new ();
2561 if (arc_aux_hash == NULL)
2562 as_fatal (_("Virtual memory exhausted"));
2563
2564 const struct arc_aux_reg *auxr = &arc_aux_regs[0];
2565 unsigned int i;
2566 for (i = 0; i < arc_num_aux_regs; i++, auxr++)
2567 {
2568 const char *retval;
2569
2570 if (!(auxr->cpu & selected_cpu.flags))
2571 continue;
2572
2573 if ((auxr->subclass != NONE)
2574 && !check_cpu_feature (auxr->subclass))
2575 continue;
2576
2577 retval = hash_insert (arc_aux_hash, auxr->name, (void *) auxr);
2578 if (retval)
2579 as_fatal (_("internal error: can't hash aux register '%s': %s"),
2580 auxr->name, retval);
2581 }
2582
2583 /* Address type declaration. */
2584 arc_addrtype_hash = hash_new ();
2585 if (arc_addrtype_hash == NULL)
2586 as_fatal (_("Virtual memory exhausted"));
2587
2588 declare_addrtype ("bd", ARC_NPS400_ADDRTYPE_BD);
2589 declare_addrtype ("jid", ARC_NPS400_ADDRTYPE_JID);
2590 declare_addrtype ("lbd", ARC_NPS400_ADDRTYPE_LBD);
2591 declare_addrtype ("mbd", ARC_NPS400_ADDRTYPE_MBD);
2592 declare_addrtype ("sd", ARC_NPS400_ADDRTYPE_SD);
2593 declare_addrtype ("sm", ARC_NPS400_ADDRTYPE_SM);
2594 declare_addrtype ("xa", ARC_NPS400_ADDRTYPE_XA);
2595 declare_addrtype ("xd", ARC_NPS400_ADDRTYPE_XD);
2596 declare_addrtype ("cd", ARC_NPS400_ADDRTYPE_CD);
2597 declare_addrtype ("cbd", ARC_NPS400_ADDRTYPE_CBD);
2598 declare_addrtype ("cjid", ARC_NPS400_ADDRTYPE_CJID);
2599 declare_addrtype ("clbd", ARC_NPS400_ADDRTYPE_CLBD);
2600 declare_addrtype ("cm", ARC_NPS400_ADDRTYPE_CM);
2601 declare_addrtype ("csd", ARC_NPS400_ADDRTYPE_CSD);
2602 declare_addrtype ("cxa", ARC_NPS400_ADDRTYPE_CXA);
2603 declare_addrtype ("cxd", ARC_NPS400_ADDRTYPE_CXD);
2604 }
2605
2606 /* Write a value out to the object file, using the appropriate
2607 endianness. */
2608
2609 void
2610 md_number_to_chars (char *buf,
2611 valueT val,
2612 int n)
2613 {
2614 if (target_big_endian)
2615 number_to_chars_bigendian (buf, val, n);
2616 else
2617 number_to_chars_littleendian (buf, val, n);
2618 }
2619
2620 /* Round up a section size to the appropriate boundary. */
2621
2622 valueT
2623 md_section_align (segT segment,
2624 valueT size)
2625 {
2626 int align = bfd_get_section_alignment (stdoutput, segment);
2627
2628 return ((size + (1 << align) - 1) & (-((valueT) 1 << align)));
2629 }
2630
2631 /* The location from which a PC relative jump should be calculated,
2632 given a PC relative reloc. */
2633
2634 long
2635 md_pcrel_from_section (fixS *fixP,
2636 segT sec)
2637 {
2638 offsetT base = fixP->fx_where + fixP->fx_frag->fr_address;
2639
2640 pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset);
2641
2642 if (fixP->fx_addsy != (symbolS *) NULL
2643 && (!S_IS_DEFINED (fixP->fx_addsy)
2644 || S_GET_SEGMENT (fixP->fx_addsy) != sec))
2645 {
2646 pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy));
2647
2648 /* The symbol is undefined (or is defined but not in this section).
2649 Let the linker figure it out. */
2650 return 0;
2651 }
2652
2653 if ((int) fixP->fx_r_type < 0)
2654 {
2655 /* These are the "internal" relocations. Align them to
2656 32 bit boundary (PCL), for the moment. */
2657 base &= ~3;
2658 }
2659 else
2660 {
2661 switch (fixP->fx_r_type)
2662 {
2663 case BFD_RELOC_ARC_PC32:
2664 /* The hardware calculates relative to the start of the
2665 insn, but this relocation is relative to location of the
2666 LIMM, compensate. The base always needs to be
2667 subtracted by 4 as we do not support this type of PCrel
2668 relocation for short instructions. */
2669 base -= 4;
2670 /* Fall through. */
2671 case BFD_RELOC_ARC_PLT32:
2672 case BFD_RELOC_ARC_S25H_PCREL_PLT:
2673 case BFD_RELOC_ARC_S21H_PCREL_PLT:
2674 case BFD_RELOC_ARC_S25W_PCREL_PLT:
2675 case BFD_RELOC_ARC_S21W_PCREL_PLT:
2676
2677 case BFD_RELOC_ARC_S21H_PCREL:
2678 case BFD_RELOC_ARC_S25H_PCREL:
2679 case BFD_RELOC_ARC_S13_PCREL:
2680 case BFD_RELOC_ARC_S21W_PCREL:
2681 case BFD_RELOC_ARC_S25W_PCREL:
2682 base &= ~3;
2683 break;
2684 default:
2685 as_bad_where (fixP->fx_file, fixP->fx_line,
2686 _("unhandled reloc %s in md_pcrel_from_section"),
2687 bfd_get_reloc_code_name (fixP->fx_r_type));
2688 break;
2689 }
2690 }
2691
2692 pr_debug ("pcrel from %"BFD_VMA_FMT"x + %lx = %"BFD_VMA_FMT"x, "
2693 "symbol: %s (%"BFD_VMA_FMT"x)\n",
2694 fixP->fx_frag->fr_address, fixP->fx_where, base,
2695 fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)",
2696 fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0);
2697
2698 return base;
2699 }
2700
2701 /* Given a BFD relocation find the coresponding operand. */
2702
2703 static const struct arc_operand *
2704 find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc)
2705 {
2706 unsigned i;
2707
2708 for (i = 0; i < arc_num_operands; i++)
2709 if (arc_operands[i].default_reloc == reloc)
2710 return &arc_operands[i];
2711 return NULL;
2712 }
2713
2714 /* Insert an operand value into an instruction. */
2715
2716 static unsigned long long
2717 insert_operand (unsigned long long insn,
2718 const struct arc_operand *operand,
2719 long long val,
2720 const char *file,
2721 unsigned line)
2722 {
2723 offsetT min = 0, max = 0;
2724
2725 if (operand->bits != 32
2726 && !(operand->flags & ARC_OPERAND_NCHK)
2727 && !(operand->flags & ARC_OPERAND_FAKE))
2728 {
2729 if (operand->flags & ARC_OPERAND_SIGNED)
2730 {
2731 max = (1 << (operand->bits - 1)) - 1;
2732 min = -(1 << (operand->bits - 1));
2733 }
2734 else
2735 {
2736 max = (1 << operand->bits) - 1;
2737 min = 0;
2738 }
2739
2740 if (val < min || val > max)
2741 as_bad_value_out_of_range (_("operand"),
2742 val, min, max, file, line);
2743 }
2744
2745 pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08llx\n",
2746 min, val, max, insn);
2747
2748 if ((operand->flags & ARC_OPERAND_ALIGNED32)
2749 && (val & 0x03))
2750 as_bad_where (file, line,
2751 _("Unaligned operand. Needs to be 32bit aligned"));
2752
2753 if ((operand->flags & ARC_OPERAND_ALIGNED16)
2754 && (val & 0x01))
2755 as_bad_where (file, line,
2756 _("Unaligned operand. Needs to be 16bit aligned"));
2757
2758 if (operand->insert)
2759 {
2760 const char *errmsg = NULL;
2761
2762 insn = (*operand->insert) (insn, val, &errmsg);
2763 if (errmsg)
2764 as_warn_where (file, line, "%s", errmsg);
2765 }
2766 else
2767 {
2768 if (operand->flags & ARC_OPERAND_TRUNCATE)
2769 {
2770 if (operand->flags & ARC_OPERAND_ALIGNED32)
2771 val >>= 2;
2772 if (operand->flags & ARC_OPERAND_ALIGNED16)
2773 val >>= 1;
2774 }
2775 insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
2776 }
2777 return insn;
2778 }
2779
2780 /* Apply a fixup to the object code. At this point all symbol values
2781 should be fully resolved, and we attempt to completely resolve the
2782 reloc. If we can not do that, we determine the correct reloc code
2783 and put it back in the fixup. To indicate that a fixup has been
2784 eliminated, set fixP->fx_done. */
2785
2786 void
2787 md_apply_fix (fixS *fixP,
2788 valueT *valP,
2789 segT seg)
2790 {
2791 char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
2792 valueT value = *valP;
2793 unsigned insn = 0;
2794 symbolS *fx_addsy, *fx_subsy;
2795 offsetT fx_offset;
2796 segT add_symbol_segment = absolute_section;
2797 segT sub_symbol_segment = absolute_section;
2798 const struct arc_operand *operand = NULL;
2799 extended_bfd_reloc_code_real_type reloc;
2800
2801 pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
2802 fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
2803 ((int) fixP->fx_r_type < 0) ? "Internal":
2804 bfd_get_reloc_code_name (fixP->fx_r_type), value,
2805 fixP->fx_offset);
2806
2807 fx_addsy = fixP->fx_addsy;
2808 fx_subsy = fixP->fx_subsy;
2809 fx_offset = 0;
2810
2811 if (fx_addsy)
2812 {
2813 add_symbol_segment = S_GET_SEGMENT (fx_addsy);
2814 }
2815
2816 if (fx_subsy
2817 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF
2818 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9
2819 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD)
2820 {
2821 resolve_symbol_value (fx_subsy);
2822 sub_symbol_segment = S_GET_SEGMENT (fx_subsy);
2823
2824 if (sub_symbol_segment == absolute_section)
2825 {
2826 /* The symbol is really a constant. */
2827 fx_offset -= S_GET_VALUE (fx_subsy);
2828 fx_subsy = NULL;
2829 }
2830 else
2831 {
2832 as_bad_where (fixP->fx_file, fixP->fx_line,
2833 _("can't resolve `%s' {%s section} - `%s' {%s section}"),
2834 fx_addsy ? S_GET_NAME (fx_addsy) : "0",
2835 segment_name (add_symbol_segment),
2836 S_GET_NAME (fx_subsy),
2837 segment_name (sub_symbol_segment));
2838 return;
2839 }
2840 }
2841
2842 if (fx_addsy
2843 && !S_IS_WEAK (fx_addsy))
2844 {
2845 if (add_symbol_segment == seg
2846 && fixP->fx_pcrel)
2847 {
2848 value += S_GET_VALUE (fx_addsy);
2849 value -= md_pcrel_from_section (fixP, seg);
2850 fx_addsy = NULL;
2851 fixP->fx_pcrel = FALSE;
2852 }
2853 else if (add_symbol_segment == absolute_section)
2854 {
2855 value = fixP->fx_offset;
2856 fx_offset += S_GET_VALUE (fixP->fx_addsy);
2857 fx_addsy = NULL;
2858 fixP->fx_pcrel = FALSE;
2859 }
2860 }
2861
2862 if (!fx_addsy)
2863 fixP->fx_done = TRUE;
2864
2865 if (fixP->fx_pcrel)
2866 {
2867 if (fx_addsy
2868 && ((S_IS_DEFINED (fx_addsy)
2869 && S_GET_SEGMENT (fx_addsy) != seg)
2870 || S_IS_WEAK (fx_addsy)))
2871 value += md_pcrel_from_section (fixP, seg);
2872
2873 switch (fixP->fx_r_type)
2874 {
2875 case BFD_RELOC_ARC_32_ME:
2876 /* This is a pc-relative value in a LIMM. Adjust it to the
2877 address of the instruction not to the address of the
2878 LIMM. Note: it is not anylonger valid this afirmation as
2879 the linker consider ARC_PC32 a fixup to entire 64 bit
2880 insn. */
2881 fixP->fx_offset += fixP->fx_frag->fr_address;
2882 /* Fall through. */
2883 case BFD_RELOC_32:
2884 fixP->fx_r_type = BFD_RELOC_ARC_PC32;
2885 /* Fall through. */
2886 case BFD_RELOC_ARC_PC32:
2887 /* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */
2888 break;
2889 default:
2890 if ((int) fixP->fx_r_type < 0)
2891 as_fatal (_("PC relative relocation not allowed for (internal) type %d"),
2892 fixP->fx_r_type);
2893 break;
2894 }
2895 }
2896
2897 pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
2898 fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
2899 ((int) fixP->fx_r_type < 0) ? "Internal":
2900 bfd_get_reloc_code_name (fixP->fx_r_type), value,
2901 fixP->fx_offset);
2902
2903
2904 /* Now check for TLS relocations. */
2905 reloc = fixP->fx_r_type;
2906 switch (reloc)
2907 {
2908 case BFD_RELOC_ARC_TLS_DTPOFF:
2909 case BFD_RELOC_ARC_TLS_LE_32:
2910 if (fixP->fx_done)
2911 break;
2912 /* Fall through. */
2913 case BFD_RELOC_ARC_TLS_GD_GOT:
2914 case BFD_RELOC_ARC_TLS_IE_GOT:
2915 S_SET_THREAD_LOCAL (fixP->fx_addsy);
2916 break;
2917
2918 case BFD_RELOC_ARC_TLS_GD_LD:
2919 gas_assert (!fixP->fx_offset);
2920 if (fixP->fx_subsy)
2921 fixP->fx_offset
2922 = (S_GET_VALUE (fixP->fx_subsy)
2923 - fixP->fx_frag->fr_address- fixP->fx_where);
2924 fixP->fx_subsy = NULL;
2925 /* Fall through. */
2926 case BFD_RELOC_ARC_TLS_GD_CALL:
2927 /* These two relocs are there just to allow ld to change the tls
2928 model for this symbol, by patching the code. The offset -
2929 and scale, if any - will be installed by the linker. */
2930 S_SET_THREAD_LOCAL (fixP->fx_addsy);
2931 break;
2932
2933 case BFD_RELOC_ARC_TLS_LE_S9:
2934 case BFD_RELOC_ARC_TLS_DTPOFF_S9:
2935 as_bad (_("TLS_*_S9 relocs are not supported yet"));
2936 break;
2937
2938 default:
2939 break;
2940 }
2941
2942 if (!fixP->fx_done)
2943 {
2944 return;
2945 }
2946
2947 /* Addjust the value if we have a constant. */
2948 value += fx_offset;
2949
2950 /* For hosts with longs bigger than 32-bits make sure that the top
2951 bits of a 32-bit negative value read in by the parser are set,
2952 so that the correct comparisons are made. */
2953 if (value & 0x80000000)
2954 value |= (-1UL << 31);
2955
2956 reloc = fixP->fx_r_type;
2957 switch (reloc)
2958 {
2959 case BFD_RELOC_8:
2960 case BFD_RELOC_16:
2961 case BFD_RELOC_24:
2962 case BFD_RELOC_32:
2963 case BFD_RELOC_64:
2964 case BFD_RELOC_ARC_32_PCREL:
2965 md_number_to_chars (fixpos, value, fixP->fx_size);
2966 return;
2967
2968 case BFD_RELOC_ARC_GOTPC32:
2969 /* I cannot fix an GOTPC relocation because I need to relax it
2970 from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */
2971 as_bad (_("Unsupported operation on reloc"));
2972 return;
2973
2974 case BFD_RELOC_ARC_TLS_DTPOFF:
2975 case BFD_RELOC_ARC_TLS_LE_32:
2976 gas_assert (!fixP->fx_addsy);
2977 gas_assert (!fixP->fx_subsy);
2978 /* Fall through. */
2979
2980 case BFD_RELOC_ARC_GOTOFF:
2981 case BFD_RELOC_ARC_32_ME:
2982 case BFD_RELOC_ARC_PC32:
2983 md_number_to_chars_midend (fixpos, value, fixP->fx_size);
2984 return;
2985
2986 case BFD_RELOC_ARC_PLT32:
2987 md_number_to_chars_midend (fixpos, value, fixP->fx_size);
2988 return;
2989
2990 case BFD_RELOC_ARC_S25H_PCREL_PLT:
2991 reloc = BFD_RELOC_ARC_S25W_PCREL;
2992 goto solve_plt;
2993
2994 case BFD_RELOC_ARC_S21H_PCREL_PLT:
2995 reloc = BFD_RELOC_ARC_S21H_PCREL;
2996 goto solve_plt;
2997
2998 case BFD_RELOC_ARC_S25W_PCREL_PLT:
2999 reloc = BFD_RELOC_ARC_S25W_PCREL;
3000 goto solve_plt;
3001
3002 case BFD_RELOC_ARC_S21W_PCREL_PLT:
3003 reloc = BFD_RELOC_ARC_S21W_PCREL;
3004 /* Fall through. */
3005
3006 case BFD_RELOC_ARC_S25W_PCREL:
3007 case BFD_RELOC_ARC_S21W_PCREL:
3008 case BFD_RELOC_ARC_S21H_PCREL:
3009 case BFD_RELOC_ARC_S25H_PCREL:
3010 case BFD_RELOC_ARC_S13_PCREL:
3011 solve_plt:
3012 operand = find_operand_for_reloc (reloc);
3013 gas_assert (operand);
3014 break;
3015
3016 default:
3017 {
3018 if ((int) fixP->fx_r_type >= 0)
3019 as_fatal (_("unhandled relocation type %s"),
3020 bfd_get_reloc_code_name (fixP->fx_r_type));
3021
3022 /* The rest of these fixups needs to be completely resolved as
3023 constants. */
3024 if (fixP->fx_addsy != 0
3025 && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section)
3026 as_bad_where (fixP->fx_file, fixP->fx_line,
3027 _("non-absolute expression in constant field"));
3028
3029 gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands);
3030 operand = &arc_operands[-(int) fixP->fx_r_type];
3031 break;
3032 }
3033 }
3034
3035 if (target_big_endian)
3036 {
3037 switch (fixP->fx_size)
3038 {
3039 case 4:
3040 insn = bfd_getb32 (fixpos);
3041 break;
3042 case 2:
3043 insn = bfd_getb16 (fixpos);
3044 break;
3045 default:
3046 as_bad_where (fixP->fx_file, fixP->fx_line,
3047 _("unknown fixup size"));
3048 }
3049 }
3050 else
3051 {
3052 insn = 0;
3053 switch (fixP->fx_size)
3054 {
3055 case 4:
3056 insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2);
3057 break;
3058 case 2:
3059 insn = bfd_getl16 (fixpos);
3060 break;
3061 default:
3062 as_bad_where (fixP->fx_file, fixP->fx_line,
3063 _("unknown fixup size"));
3064 }
3065 }
3066
3067 insn = insert_operand (insn, operand, (offsetT) value,
3068 fixP->fx_file, fixP->fx_line);
3069
3070 md_number_to_chars_midend (fixpos, insn, fixP->fx_size);
3071 }
3072
3073 /* Prepare machine-dependent frags for relaxation.
3074
3075 Called just before relaxation starts. Any symbol that is now undefined
3076 will not become defined.
3077
3078 Return the correct fr_subtype in the frag.
3079
3080 Return the initial "guess for fr_var" to caller. The guess for fr_var
3081 is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix
3082 or fr_var contributes to our returned value.
3083
3084 Although it may not be explicit in the frag, pretend
3085 fr_var starts with a value. */
3086
3087 int
3088 md_estimate_size_before_relax (fragS *fragP,
3089 segT segment)
3090 {
3091 int growth;
3092
3093 /* If the symbol is not located within the same section AND it's not
3094 an absolute section, use the maximum. OR if the symbol is a
3095 constant AND the insn is by nature not pc-rel, use the maximum.
3096 OR if the symbol is being equated against another symbol, use the
3097 maximum. OR if the symbol is weak use the maximum. */
3098 if ((S_GET_SEGMENT (fragP->fr_symbol) != segment
3099 && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section)
3100 || (symbol_constant_p (fragP->fr_symbol)
3101 && !fragP->tc_frag_data.pcrel)
3102 || symbol_equated_p (fragP->fr_symbol)
3103 || S_IS_WEAK (fragP->fr_symbol))
3104 {
3105 while (md_relax_table[fragP->fr_subtype].rlx_more != ARC_RLX_NONE)
3106 ++fragP->fr_subtype;
3107 }
3108
3109 growth = md_relax_table[fragP->fr_subtype].rlx_length;
3110 fragP->fr_var = growth;
3111
3112 pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n",
3113 fragP->fr_file, fragP->fr_line, growth);
3114
3115 return growth;
3116 }
3117
3118 /* Translate internal representation of relocation info to BFD target
3119 format. */
3120
3121 arelent *
3122 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
3123 fixS *fixP)
3124 {
3125 arelent *reloc;
3126 bfd_reloc_code_real_type code;
3127
3128 reloc = XNEW (arelent);
3129 reloc->sym_ptr_ptr = XNEW (asymbol *);
3130 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
3131 reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
3132
3133 /* Make sure none of our internal relocations make it this far.
3134 They'd better have been fully resolved by this point. */
3135 gas_assert ((int) fixP->fx_r_type > 0);
3136
3137 code = fixP->fx_r_type;
3138
3139 /* if we have something like add gp, pcl,
3140 _GLOBAL_OFFSET_TABLE_@gotpc. */
3141 if (code == BFD_RELOC_ARC_GOTPC32
3142 && GOT_symbol
3143 && fixP->fx_addsy == GOT_symbol)
3144 code = BFD_RELOC_ARC_GOTPC;
3145
3146 reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
3147 if (reloc->howto == NULL)
3148 {
3149 as_bad_where (fixP->fx_file, fixP->fx_line,
3150 _("cannot represent `%s' relocation in object file"),
3151 bfd_get_reloc_code_name (code));
3152 return NULL;
3153 }
3154
3155 if (!fixP->fx_pcrel != !reloc->howto->pc_relative)
3156 as_fatal (_("internal error? cannot generate `%s' relocation"),
3157 bfd_get_reloc_code_name (code));
3158
3159 gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
3160
3161 reloc->addend = fixP->fx_offset;
3162
3163 return reloc;
3164 }
3165
3166 /* Perform post-processing of machine-dependent frags after relaxation.
3167 Called after relaxation is finished.
3168 In: Address of frag.
3169 fr_type == rs_machine_dependent.
3170 fr_subtype is what the address relaxed to.
3171
3172 Out: Any fixS:s and constants are set up. */
3173
3174 void
3175 md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
3176 segT segment ATTRIBUTE_UNUSED,
3177 fragS *fragP)
3178 {
3179 const relax_typeS *table_entry;
3180 char *dest;
3181 const struct arc_opcode *opcode;
3182 struct arc_insn insn;
3183 int size, fix;
3184 struct arc_relax_type *relax_arg = &fragP->tc_frag_data;
3185
3186 fix = (fragP->fr_fix < 0 ? 0 : fragP->fr_fix);
3187 dest = fragP->fr_literal + fix;
3188 table_entry = TC_GENERIC_RELAX_TABLE + fragP->fr_subtype;
3189
3190 pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, "
3191 "var: %"BFD_VMA_FMT"d\n",
3192 fragP->fr_file, fragP->fr_line,
3193 fragP->fr_subtype, fix, fragP->fr_var);
3194
3195 if (fragP->fr_subtype <= 0
3196 && fragP->fr_subtype >= arc_num_relax_opcodes)
3197 as_fatal (_("no relaxation found for this instruction."));
3198
3199 opcode = &arc_relax_opcodes[fragP->fr_subtype];
3200
3201 assemble_insn (opcode, relax_arg->tok, relax_arg->ntok, relax_arg->pflags,
3202 relax_arg->nflg, &insn);
3203
3204 apply_fixups (&insn, fragP, fix);
3205
3206 size = insn.len + (insn.has_limm ? 4 : 0);
3207 gas_assert (table_entry->rlx_length == size);
3208 emit_insn0 (&insn, dest, TRUE);
3209
3210 fragP->fr_fix += table_entry->rlx_length;
3211 fragP->fr_var = 0;
3212 }
3213
3214 /* We have no need to default values of symbols. We could catch
3215 register names here, but that is handled by inserting them all in
3216 the symbol table to begin with. */
3217
3218 symbolS *
3219 md_undefined_symbol (char *name)
3220 {
3221 /* The arc abi demands that a GOT[0] should be referencible as
3222 [pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a
3223 GOTPC reference to _GLOBAL_OFFSET_TABLE_. */
3224 if (((*name == '_')
3225 && (*(name+1) == 'G')
3226 && (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0))
3227 || ((*name == '_')
3228 && (*(name+1) == 'D')
3229 && (strcmp (name, DYNAMIC_STRUCT_NAME) == 0)))
3230 {
3231 if (!GOT_symbol)
3232 {
3233 if (symbol_find (name))
3234 as_bad ("GOT already in symbol table");
3235
3236 GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section,
3237 (valueT) 0, &zero_address_frag);
3238 };
3239 return GOT_symbol;
3240 }
3241 return NULL;
3242 }
3243
3244 /* Turn a string in input_line_pointer into a floating point constant
3245 of type type, and store the appropriate bytes in *litP. The number
3246 of LITTLENUMS emitted is stored in *sizeP. An error message is
3247 returned, or NULL on OK. */
3248
3249 const char *
3250 md_atof (int type, char *litP, int *sizeP)
3251 {
3252 return ieee_md_atof (type, litP, sizeP, target_big_endian);
3253 }
3254
3255 /* Called for any expression that can not be recognized. When the
3256 function is called, `input_line_pointer' will point to the start of
3257 the expression. */
3258
3259 void
3260 md_operand (expressionS *expressionP ATTRIBUTE_UNUSED)
3261 {
3262 char *p = input_line_pointer;
3263 if (*p == '@')
3264 {
3265 input_line_pointer++;
3266 expressionP->X_op = O_symbol;
3267 expression (expressionP);
3268 }
3269 }
3270
3271 /* This function is called from the function 'expression', it attempts
3272 to parse special names (in our case register names). It fills in
3273 the expression with the identified register. It returns TRUE if
3274 it is a register and FALSE otherwise. */
3275
3276 bfd_boolean
3277 arc_parse_name (const char *name,
3278 struct expressionS *e)
3279 {
3280 struct symbol *sym;
3281
3282 if (!assembling_insn)
3283 return FALSE;
3284
3285 if (e->X_op == O_symbol)
3286 return FALSE;
3287
3288 sym = hash_find (arc_reg_hash, name);
3289 if (sym)
3290 {
3291 e->X_op = O_register;
3292 e->X_add_number = S_GET_VALUE (sym);
3293 return TRUE;
3294 }
3295
3296 sym = hash_find (arc_addrtype_hash, name);
3297 if (sym)
3298 {
3299 e->X_op = O_addrtype;
3300 e->X_add_number = S_GET_VALUE (sym);
3301 return TRUE;
3302 }
3303
3304 return FALSE;
3305 }
3306
3307 /* md_parse_option
3308 Invocation line includes a switch not recognized by the base assembler.
3309 See if it's a processor-specific option.
3310
3311 New options (supported) are:
3312
3313 -mcpu=<cpu name> Assemble for selected processor
3314 -EB/-mbig-endian Big-endian
3315 -EL/-mlittle-endian Little-endian
3316 -mrelax Enable relaxation
3317
3318 The following CPU names are recognized:
3319 arc600, arc700, arcem, archs, nps400. */
3320
3321 int
3322 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED)
3323 {
3324 switch (c)
3325 {
3326 case OPTION_ARC600:
3327 case OPTION_ARC601:
3328 return md_parse_option (OPTION_MCPU, "arc600");
3329
3330 case OPTION_ARC700:
3331 return md_parse_option (OPTION_MCPU, "arc700");
3332
3333 case OPTION_ARCEM:
3334 return md_parse_option (OPTION_MCPU, "arcem");
3335
3336 case OPTION_ARCHS:
3337 return md_parse_option (OPTION_MCPU, "archs");
3338
3339 case OPTION_MCPU:
3340 {
3341 arc_select_cpu (arg, MACH_SELECTION_FROM_COMMAND_LINE);
3342 break;
3343 }
3344
3345 case OPTION_EB:
3346 arc_target_format = "elf32-bigarc";
3347 byte_order = BIG_ENDIAN;
3348 break;
3349
3350 case OPTION_EL:
3351 arc_target_format = "elf32-littlearc";
3352 byte_order = LITTLE_ENDIAN;
3353 break;
3354
3355 case OPTION_CD:
3356 selected_cpu.features |= ARC_CD;
3357 arc_check_feature ();
3358 break;
3359
3360 case OPTION_RELAX:
3361 relaxation_state = 1;
3362 break;
3363
3364 case OPTION_NPS400:
3365 selected_cpu.features |= ARC_NPS400;
3366 arc_check_feature ();
3367 break;
3368
3369 case OPTION_SPFP:
3370 selected_cpu.features |= ARC_SPFP;
3371 arc_check_feature ();
3372 break;
3373
3374 case OPTION_DPFP:
3375 selected_cpu.features |= ARC_DPFP;
3376 arc_check_feature ();
3377 break;
3378
3379 case OPTION_FPUDA:
3380 selected_cpu.features |= ARC_FPUDA;
3381 arc_check_feature ();
3382 break;
3383
3384 /* Dummy options are accepted but have no effect. */
3385 case OPTION_USER_MODE:
3386 case OPTION_LD_EXT_MASK:
3387 case OPTION_SWAP:
3388 case OPTION_NORM:
3389 case OPTION_BARREL_SHIFT:
3390 case OPTION_MIN_MAX:
3391 case OPTION_NO_MPY:
3392 case OPTION_EA:
3393 case OPTION_MUL64:
3394 case OPTION_SIMD:
3395 case OPTION_XMAC_D16:
3396 case OPTION_XMAC_24:
3397 case OPTION_DSP_PACKA:
3398 case OPTION_CRC:
3399 case OPTION_DVBF:
3400 case OPTION_TELEPHONY:
3401 case OPTION_XYMEMORY:
3402 case OPTION_LOCK:
3403 case OPTION_SWAPE:
3404 case OPTION_RTSC:
3405 break;
3406
3407 default:
3408 return 0;
3409 }
3410
3411 return 1;
3412 }
3413
3414 void
3415 md_show_usage (FILE *stream)
3416 {
3417 fprintf (stream, _("ARC-specific assembler options:\n"));
3418
3419 fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name> "
3420 "(default: %s)\n", TARGET_WITH_CPU);
3421 fprintf (stream, " -mcpu=nps400\t\t same as -mcpu=arc700 -mnps400\n");
3422 fprintf (stream, " -mA6/-mARC600/-mARC601 same as -mcpu=arc600\n");
3423 fprintf (stream, " -mA7/-mARC700\t\t same as -mcpu=arc700\n");
3424 fprintf (stream, " -mEM\t\t\t same as -mcpu=arcem\n");
3425 fprintf (stream, " -mHS\t\t\t same as -mcpu=archs\n");
3426
3427 fprintf (stream, " -mnps400\t\t enable NPS-400 extended instructions\n");
3428 fprintf (stream, " -mspfp\t\t enable single-precision floating point instructions\n");
3429 fprintf (stream, " -mdpfp\t\t enable double-precision floating point instructions\n");
3430 fprintf (stream, " -mfpuda\t\t enable double-precision assist floating "
3431 "point\n\t\t\t instructions for ARC EM\n");
3432
3433 fprintf (stream,
3434 " -mcode-density\t enable code density option for ARC EM\n");
3435
3436 fprintf (stream, _("\
3437 -EB assemble code for a big-endian cpu\n"));
3438 fprintf (stream, _("\
3439 -EL assemble code for a little-endian cpu\n"));
3440 fprintf (stream, _("\
3441 -mrelax enable relaxation\n"));
3442
3443 fprintf (stream, _("The following ARC-specific assembler options are "
3444 "deprecated and are accepted\nfor compatibility only:\n"));
3445
3446 fprintf (stream, _(" -mEA\n"
3447 " -mbarrel-shifter\n"
3448 " -mbarrel_shifter\n"
3449 " -mcrc\n"
3450 " -mdsp-packa\n"
3451 " -mdsp_packa\n"
3452 " -mdvbf\n"
3453 " -mld-extension-reg-mask\n"
3454 " -mlock\n"
3455 " -mmac-24\n"
3456 " -mmac-d16\n"
3457 " -mmac_24\n"
3458 " -mmac_d16\n"
3459 " -mmin-max\n"
3460 " -mmin_max\n"
3461 " -mmul64\n"
3462 " -mno-mpy\n"
3463 " -mnorm\n"
3464 " -mrtsc\n"
3465 " -msimd\n"
3466 " -mswap\n"
3467 " -mswape\n"
3468 " -mtelephony\n"
3469 " -muser-mode-only\n"
3470 " -mxy\n"));
3471 }
3472
3473 /* Find the proper relocation for the given opcode. */
3474
3475 static extended_bfd_reloc_code_real_type
3476 find_reloc (const char *name,
3477 const char *opcodename,
3478 const struct arc_flags *pflags,
3479 int nflg,
3480 extended_bfd_reloc_code_real_type reloc)
3481 {
3482 unsigned int i;
3483 int j;
3484 bfd_boolean found_flag, tmp;
3485 extended_bfd_reloc_code_real_type ret = BFD_RELOC_UNUSED;
3486
3487 for (i = 0; i < arc_num_equiv_tab; i++)
3488 {
3489 const struct arc_reloc_equiv_tab *r = &arc_reloc_equiv[i];
3490
3491 /* Find the entry. */
3492 if (strcmp (name, r->name))
3493 continue;
3494 if (r->mnemonic && (strcmp (r->mnemonic, opcodename)))
3495 continue;
3496 if (r->flags[0])
3497 {
3498 if (!nflg)
3499 continue;
3500 found_flag = FALSE;
3501 unsigned * psflg = (unsigned *)r->flags;
3502 do
3503 {
3504 tmp = FALSE;
3505 for (j = 0; j < nflg; j++)
3506 if (!strcmp (pflags[j].name,
3507 arc_flag_operands[*psflg].name))
3508 {
3509 tmp = TRUE;
3510 break;
3511 }
3512 if (!tmp)
3513 {
3514 found_flag = FALSE;
3515 break;
3516 }
3517 else
3518 {
3519 found_flag = TRUE;
3520 }
3521 ++ psflg;
3522 } while (*psflg);
3523
3524 if (!found_flag)
3525 continue;
3526 }
3527
3528 if (reloc != r->oldreloc)
3529 continue;
3530 /* Found it. */
3531 ret = r->newreloc;
3532 break;
3533 }
3534
3535 if (ret == BFD_RELOC_UNUSED)
3536 as_bad (_("Unable to find %s relocation for instruction %s"),
3537 name, opcodename);
3538 return ret;
3539 }
3540
3541 /* All the symbol types that are allowed to be used for
3542 relaxation. */
3543
3544 static bfd_boolean
3545 may_relax_expr (expressionS tok)
3546 {
3547 /* Check if we have unrelaxable relocs. */
3548 switch (tok.X_md)
3549 {
3550 default:
3551 break;
3552 case O_plt:
3553 return FALSE;
3554 }
3555
3556 switch (tok.X_op)
3557 {
3558 case O_symbol:
3559 case O_multiply:
3560 case O_divide:
3561 case O_modulus:
3562 case O_add:
3563 case O_subtract:
3564 break;
3565
3566 default:
3567 return FALSE;
3568 }
3569 return TRUE;
3570 }
3571
3572 /* Checks if flags are in line with relaxable insn. */
3573
3574 static bfd_boolean
3575 relaxable_flag (const struct arc_relaxable_ins *ins,
3576 const struct arc_flags *pflags,
3577 int nflgs)
3578 {
3579 unsigned flag_class,
3580 flag,
3581 flag_class_idx = 0,
3582 flag_idx = 0;
3583
3584 const struct arc_flag_operand *flag_opand;
3585 int i, counttrue = 0;
3586
3587 /* Iterate through flags classes. */
3588 while ((flag_class = ins->flag_classes[flag_class_idx]) != 0)
3589 {
3590 /* Iterate through flags in flag class. */
3591 while ((flag = arc_flag_classes[flag_class].flags[flag_idx])
3592 != 0)
3593 {
3594 flag_opand = &arc_flag_operands[flag];
3595 /* Iterate through flags in ins to compare. */
3596 for (i = 0; i < nflgs; ++i)
3597 {
3598 if (strcmp (flag_opand->name, pflags[i].name) == 0)
3599 ++counttrue;
3600 }
3601
3602 ++flag_idx;
3603 }
3604
3605 ++flag_class_idx;
3606 flag_idx = 0;
3607 }
3608
3609 /* If counttrue == nflgs, then all flags have been found. */
3610 return (counttrue == nflgs ? TRUE : FALSE);
3611 }
3612
3613 /* Checks if operands are in line with relaxable insn. */
3614
3615 static bfd_boolean
3616 relaxable_operand (const struct arc_relaxable_ins *ins,
3617 const expressionS *tok,
3618 int ntok)
3619 {
3620 const enum rlx_operand_type *operand = &ins->operands[0];
3621 int i = 0;
3622
3623 while (*operand != EMPTY)
3624 {
3625 const expressionS *epr = &tok[i];
3626
3627 if (i != 0 && i >= ntok)
3628 return FALSE;
3629
3630 switch (*operand)
3631 {
3632 case IMMEDIATE:
3633 if (!(epr->X_op == O_multiply
3634 || epr->X_op == O_divide
3635 || epr->X_op == O_modulus
3636 || epr->X_op == O_add
3637 || epr->X_op == O_subtract
3638 || epr->X_op == O_symbol))
3639 return FALSE;
3640 break;
3641
3642 case REGISTER_DUP:
3643 if ((i <= 0)
3644 || (epr->X_add_number != tok[i - 1].X_add_number))
3645 return FALSE;
3646 /* Fall through. */
3647 case REGISTER:
3648 if (epr->X_op != O_register)
3649 return FALSE;
3650 break;
3651
3652 case REGISTER_S:
3653 if (epr->X_op != O_register)
3654 return FALSE;
3655
3656 switch (epr->X_add_number)
3657 {
3658 case 0: case 1: case 2: case 3:
3659 case 12: case 13: case 14: case 15:
3660 break;
3661 default:
3662 return FALSE;
3663 }
3664 break;
3665
3666 case REGISTER_NO_GP:
3667 if ((epr->X_op != O_register)
3668 || (epr->X_add_number == 26)) /* 26 is the gp register. */
3669 return FALSE;
3670 break;
3671
3672 case BRACKET:
3673 if (epr->X_op != O_bracket)
3674 return FALSE;
3675 break;
3676
3677 default:
3678 /* Don't understand, bail out. */
3679 return FALSE;
3680 break;
3681 }
3682
3683 ++i;
3684 operand = &ins->operands[i];
3685 }
3686
3687 return (i == ntok ? TRUE : FALSE);
3688 }
3689
3690 /* Return TRUE if this OPDCODE is a candidate for relaxation. */
3691
3692 static bfd_boolean
3693 relax_insn_p (const struct arc_opcode *opcode,
3694 const expressionS *tok,
3695 int ntok,
3696 const struct arc_flags *pflags,
3697 int nflg)
3698 {
3699 unsigned i;
3700 bfd_boolean rv = FALSE;
3701
3702 /* Check the relaxation table. */
3703 for (i = 0; i < arc_num_relaxable_ins && relaxation_state; ++i)
3704 {
3705 const struct arc_relaxable_ins *arc_rlx_ins = &arc_relaxable_insns[i];
3706
3707 if ((strcmp (opcode->name, arc_rlx_ins->mnemonic_r) == 0)
3708 && may_relax_expr (tok[arc_rlx_ins->opcheckidx])
3709 && relaxable_operand (arc_rlx_ins, tok, ntok)
3710 && relaxable_flag (arc_rlx_ins, pflags, nflg))
3711 {
3712 rv = TRUE;
3713 frag_now->fr_subtype = arc_relaxable_insns[i].subtype;
3714 memcpy (&frag_now->tc_frag_data.tok, tok,
3715 sizeof (expressionS) * ntok);
3716 memcpy (&frag_now->tc_frag_data.pflags, pflags,
3717 sizeof (struct arc_flags) * nflg);
3718 frag_now->tc_frag_data.nflg = nflg;
3719 frag_now->tc_frag_data.ntok = ntok;
3720 break;
3721 }
3722 }
3723
3724 return rv;
3725 }
3726
3727 /* Turn an opcode description and a set of arguments into
3728 an instruction and a fixup. */
3729
3730 static void
3731 assemble_insn (const struct arc_opcode *opcode,
3732 const expressionS *tok,
3733 int ntok,
3734 const struct arc_flags *pflags,
3735 int nflg,
3736 struct arc_insn *insn)
3737 {
3738 const expressionS *reloc_exp = NULL;
3739 unsigned long long image;
3740 const unsigned char *argidx;
3741 int i;
3742 int tokidx = 0;
3743 unsigned char pcrel = 0;
3744 bfd_boolean needGOTSymbol;
3745 bfd_boolean has_delay_slot = FALSE;
3746 extended_bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED;
3747
3748 memset (insn, 0, sizeof (*insn));
3749 image = opcode->opcode;
3750
3751 pr_debug ("%s:%d: assemble_insn: %s using opcode %llx\n",
3752 frag_now->fr_file, frag_now->fr_line, opcode->name,
3753 opcode->opcode);
3754
3755 /* Handle operands. */
3756 for (argidx = opcode->operands; *argidx; ++argidx)
3757 {
3758 const struct arc_operand *operand = &arc_operands[*argidx];
3759 const expressionS *t = (const expressionS *) 0;
3760
3761 if (ARC_OPERAND_IS_FAKE (operand))
3762 continue;
3763
3764 if (operand->flags & ARC_OPERAND_DUPLICATE)
3765 {
3766 /* Duplicate operand, already inserted. */
3767 tokidx ++;
3768 continue;
3769 }
3770
3771 if (tokidx >= ntok)
3772 {
3773 abort ();
3774 }
3775 else
3776 t = &tok[tokidx++];
3777
3778 /* Regardless if we have a reloc or not mark the instruction
3779 limm if it is the case. */
3780 if (operand->flags & ARC_OPERAND_LIMM)
3781 insn->has_limm = TRUE;
3782
3783 switch (t->X_op)
3784 {
3785 case O_register:
3786 image = insert_operand (image, operand, regno (t->X_add_number),
3787 NULL, 0);
3788 break;
3789
3790 case O_constant:
3791 image = insert_operand (image, operand, t->X_add_number, NULL, 0);
3792 reloc_exp = t;
3793 if (operand->flags & ARC_OPERAND_LIMM)
3794 insn->limm = t->X_add_number;
3795 break;
3796
3797 case O_bracket:
3798 case O_colon:
3799 case O_addrtype:
3800 /* Ignore brackets, colons, and address types. */
3801 break;
3802
3803 case O_absent:
3804 gas_assert (operand->flags & ARC_OPERAND_IGNORE);
3805 break;
3806
3807 case O_subtract:
3808 /* Maybe register range. */
3809 if ((t->X_add_number == 0)
3810 && contains_register (t->X_add_symbol)
3811 && contains_register (t->X_op_symbol))
3812 {
3813 int regs;
3814
3815 regs = get_register (t->X_add_symbol);
3816 regs <<= 16;
3817 regs |= get_register (t->X_op_symbol);
3818 image = insert_operand (image, operand, regs, NULL, 0);
3819 break;
3820 }
3821 /* Fall through. */
3822
3823 default:
3824 /* This operand needs a relocation. */
3825 needGOTSymbol = FALSE;
3826
3827 switch (t->X_md)
3828 {
3829 case O_plt:
3830 if (opcode->insn_class == JUMP)
3831 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3832 _("Unable to use @plt relocatio for insn %s"),
3833 opcode->name);
3834 needGOTSymbol = TRUE;
3835 reloc = find_reloc ("plt", opcode->name,
3836 pflags, nflg,
3837 operand->default_reloc);
3838 break;
3839
3840 case O_gotoff:
3841 case O_gotpc:
3842 needGOTSymbol = TRUE;
3843 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3844 break;
3845 case O_pcl:
3846 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3847 if (arc_opcode_len (opcode) == 2
3848 || opcode->insn_class == JUMP)
3849 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3850 _("Unable to use @pcl relocation for insn %s"),
3851 opcode->name);
3852 break;
3853 case O_sda:
3854 reloc = find_reloc ("sda", opcode->name,
3855 pflags, nflg,
3856 operand->default_reloc);
3857 break;
3858 case O_tlsgd:
3859 case O_tlsie:
3860 needGOTSymbol = TRUE;
3861 /* Fall-through. */
3862
3863 case O_tpoff:
3864 case O_dtpoff:
3865 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3866 break;
3867
3868 case O_tpoff9: /*FIXME! Check for the conditionality of
3869 the insn. */
3870 case O_dtpoff9: /*FIXME! Check for the conditionality of
3871 the insn. */
3872 as_bad (_("TLS_*_S9 relocs are not supported yet"));
3873 break;
3874
3875 default:
3876 /* Just consider the default relocation. */
3877 reloc = operand->default_reloc;
3878 break;
3879 }
3880
3881 if (needGOTSymbol && (GOT_symbol == NULL))
3882 GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
3883
3884 reloc_exp = t;
3885
3886 #if 0
3887 if (reloc > 0)
3888 {
3889 /* sanity checks. */
3890 reloc_howto_type *reloc_howto
3891 = bfd_reloc_type_lookup (stdoutput,
3892 (bfd_reloc_code_real_type) reloc);
3893 unsigned reloc_bitsize = reloc_howto->bitsize;
3894 if (reloc_howto->rightshift)
3895 reloc_bitsize -= reloc_howto->rightshift;
3896 if (reloc_bitsize != operand->bits)
3897 {
3898 as_bad (_("invalid relocation %s for field"),
3899 bfd_get_reloc_code_name (reloc));
3900 return;
3901 }
3902 }
3903 #endif
3904 if (insn->nfixups >= MAX_INSN_FIXUPS)
3905 as_fatal (_("too many fixups"));
3906
3907 struct arc_fixup *fixup;
3908 fixup = &insn->fixups[insn->nfixups++];
3909 fixup->exp = *t;
3910 fixup->reloc = reloc;
3911 pcrel = (operand->flags & ARC_OPERAND_PCREL) ? 1 : 0;
3912 fixup->pcrel = pcrel;
3913 fixup->islong = (operand->flags & ARC_OPERAND_LIMM) ?
3914 TRUE : FALSE;
3915 break;
3916 }
3917 }
3918
3919 /* Handle flags. */
3920 for (i = 0; i < nflg; i++)
3921 {
3922 const struct arc_flag_operand *flg_operand = pflags[i].flgp;
3923
3924 /* Check if the instruction has a delay slot. */
3925 if (!strcmp (flg_operand->name, "d"))
3926 has_delay_slot = TRUE;
3927
3928 /* There is an exceptional case when we cannot insert a flag
3929 just as it is. The .T flag must be handled in relation with
3930 the relative address. */
3931 if (!strcmp (flg_operand->name, "t")
3932 || !strcmp (flg_operand->name, "nt"))
3933 {
3934 unsigned bitYoperand = 0;
3935 /* FIXME! move selection bbit/brcc in arc-opc.c. */
3936 if (!strcmp (flg_operand->name, "t"))
3937 if (!strcmp (opcode->name, "bbit0")
3938 || !strcmp (opcode->name, "bbit1"))
3939 bitYoperand = arc_NToperand;
3940 else
3941 bitYoperand = arc_Toperand;
3942 else
3943 if (!strcmp (opcode->name, "bbit0")
3944 || !strcmp (opcode->name, "bbit1"))
3945 bitYoperand = arc_Toperand;
3946 else
3947 bitYoperand = arc_NToperand;
3948
3949 gas_assert (reloc_exp != NULL);
3950 if (reloc_exp->X_op == O_constant)
3951 {
3952 /* Check if we have a constant and solved it
3953 immediately. */
3954 offsetT val = reloc_exp->X_add_number;
3955 image |= insert_operand (image, &arc_operands[bitYoperand],
3956 val, NULL, 0);
3957 }
3958 else
3959 {
3960 struct arc_fixup *fixup;
3961
3962 if (insn->nfixups >= MAX_INSN_FIXUPS)
3963 as_fatal (_("too many fixups"));
3964
3965 fixup = &insn->fixups[insn->nfixups++];
3966 fixup->exp = *reloc_exp;
3967 fixup->reloc = -bitYoperand;
3968 fixup->pcrel = pcrel;
3969 fixup->islong = FALSE;
3970 }
3971 }
3972 else
3973 image |= (flg_operand->code & ((1 << flg_operand->bits) - 1))
3974 << flg_operand->shift;
3975 }
3976
3977 insn->relax = relax_insn_p (opcode, tok, ntok, pflags, nflg);
3978
3979 /* Instruction length. */
3980 insn->len = arc_opcode_len (opcode);
3981
3982 insn->insn = image;
3983
3984 /* Update last insn status. */
3985 arc_last_insns[1] = arc_last_insns[0];
3986 arc_last_insns[0].opcode = opcode;
3987 arc_last_insns[0].has_limm = insn->has_limm;
3988 arc_last_insns[0].has_delay_slot = has_delay_slot;
3989
3990 /* Check if the current instruction is legally used. */
3991 if (arc_last_insns[1].has_delay_slot
3992 && is_br_jmp_insn_p (arc_last_insns[0].opcode))
3993 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3994 _("A jump/branch instruction in delay slot."));
3995 }
3996
3997 void
3998 arc_handle_align (fragS* fragP)
3999 {
4000 if ((fragP)->fr_type == rs_align_code)
4001 {
4002 char *dest = (fragP)->fr_literal + (fragP)->fr_fix;
4003 valueT count = ((fragP)->fr_next->fr_address
4004 - (fragP)->fr_address - (fragP)->fr_fix);
4005
4006 (fragP)->fr_var = 2;
4007
4008 if (count & 1)/* Padding in the gap till the next 2-byte
4009 boundary with 0s. */
4010 {
4011 (fragP)->fr_fix++;
4012 *dest++ = 0;
4013 }
4014 /* Writing nop_s. */
4015 md_number_to_chars (dest, NOP_OPCODE_S, 2);
4016 }
4017 }
4018
4019 /* Here we decide which fixups can be adjusted to make them relative
4020 to the beginning of the section instead of the symbol. Basically
4021 we need to make sure that the dynamic relocations are done
4022 correctly, so in some cases we force the original symbol to be
4023 used. */
4024
4025 int
4026 tc_arc_fix_adjustable (fixS *fixP)
4027 {
4028
4029 /* Prevent all adjustments to global symbols. */
4030 if (S_IS_EXTERNAL (fixP->fx_addsy))
4031 return 0;
4032 if (S_IS_WEAK (fixP->fx_addsy))
4033 return 0;
4034
4035 /* Adjust_reloc_syms doesn't know about the GOT. */
4036 switch (fixP->fx_r_type)
4037 {
4038 case BFD_RELOC_ARC_GOTPC32:
4039 case BFD_RELOC_ARC_PLT32:
4040 case BFD_RELOC_ARC_S25H_PCREL_PLT:
4041 case BFD_RELOC_ARC_S21H_PCREL_PLT:
4042 case BFD_RELOC_ARC_S25W_PCREL_PLT:
4043 case BFD_RELOC_ARC_S21W_PCREL_PLT:
4044 return 0;
4045
4046 default:
4047 break;
4048 }
4049
4050 return 1;
4051 }
4052
4053 /* Compute the reloc type of an expression EXP. */
4054
4055 static void
4056 arc_check_reloc (expressionS *exp,
4057 bfd_reloc_code_real_type *r_type_p)
4058 {
4059 if (*r_type_p == BFD_RELOC_32
4060 && exp->X_op == O_subtract
4061 && exp->X_op_symbol != NULL
4062 && exp->X_op_symbol->bsym->section == now_seg)
4063 *r_type_p = BFD_RELOC_ARC_32_PCREL;
4064 }
4065
4066
4067 /* Add expression EXP of SIZE bytes to offset OFF of fragment FRAG. */
4068
4069 void
4070 arc_cons_fix_new (fragS *frag,
4071 int off,
4072 int size,
4073 expressionS *exp,
4074 bfd_reloc_code_real_type r_type)
4075 {
4076 r_type = BFD_RELOC_UNUSED;
4077
4078 switch (size)
4079 {
4080 case 1:
4081 r_type = BFD_RELOC_8;
4082 break;
4083
4084 case 2:
4085 r_type = BFD_RELOC_16;
4086 break;
4087
4088 case 3:
4089 r_type = BFD_RELOC_24;
4090 break;
4091
4092 case 4:
4093 r_type = BFD_RELOC_32;
4094 arc_check_reloc (exp, &r_type);
4095 break;
4096
4097 case 8:
4098 r_type = BFD_RELOC_64;
4099 break;
4100
4101 default:
4102 as_bad (_("unsupported BFD relocation size %u"), size);
4103 r_type = BFD_RELOC_UNUSED;
4104 }
4105
4106 fix_new_exp (frag, off, size, exp, 0, r_type);
4107 }
4108
4109 /* The actual routine that checks the ZOL conditions. */
4110
4111 static void
4112 check_zol (symbolS *s)
4113 {
4114 switch (selected_cpu.mach)
4115 {
4116 case bfd_mach_arc_arcv2:
4117 if (selected_cpu.flags & ARC_OPCODE_ARCv2EM)
4118 return;
4119
4120 if (is_br_jmp_insn_p (arc_last_insns[0].opcode)
4121 || arc_last_insns[1].has_delay_slot)
4122 as_bad (_("Jump/Branch instruction detected at the end of the ZOL label @%s"),
4123 S_GET_NAME (s));
4124
4125 break;
4126 case bfd_mach_arc_arc600:
4127
4128 if (is_kernel_insn_p (arc_last_insns[0].opcode))
4129 as_bad (_("Kernel instruction detected at the end of the ZOL label @%s"),
4130 S_GET_NAME (s));
4131
4132 if (arc_last_insns[0].has_limm
4133 && is_br_jmp_insn_p (arc_last_insns[0].opcode))
4134 as_bad (_("A jump instruction with long immediate detected at the \
4135 end of the ZOL label @%s"), S_GET_NAME (s));
4136
4137 /* Fall through. */
4138 case bfd_mach_arc_arc700:
4139 if (arc_last_insns[0].has_delay_slot)
4140 as_bad (_("An illegal use of delay slot detected at the end of the ZOL label @%s"),
4141 S_GET_NAME (s));
4142
4143 break;
4144 default:
4145 break;
4146 }
4147 }
4148
4149 /* If ZOL end check the last two instruction for illegals. */
4150 void
4151 arc_frob_label (symbolS * sym)
4152 {
4153 if (ARC_GET_FLAG (sym) & ARC_FLAG_ZOL)
4154 check_zol (sym);
4155
4156 dwarf2_emit_label (sym);
4157 }
4158
4159 /* Used because generic relaxation assumes a pc-rel value whilst we
4160 also relax instructions that use an absolute value resolved out of
4161 relative values (if that makes any sense). An example: 'add r1,
4162 r2, @.L2 - .' The symbols . and @.L2 are relative to the section
4163 but if they're in the same section we can subtract the section
4164 offset relocation which ends up in a resolved value. So if @.L2 is
4165 .text + 0x50 and . is .text + 0x10, we can say that .text + 0x50 -
4166 .text + 0x40 = 0x10. */
4167 int
4168 arc_pcrel_adjust (fragS *fragP)
4169 {
4170 if (!fragP->tc_frag_data.pcrel)
4171 return fragP->fr_address + fragP->fr_fix;
4172
4173 return 0;
4174 }
4175
4176 /* Initialize the DWARF-2 unwind information for this procedure. */
4177
4178 void
4179 tc_arc_frame_initial_instructions (void)
4180 {
4181 /* Stack pointer is register 28. */
4182 cfi_add_CFA_def_cfa (28, 0);
4183 }
4184
4185 int
4186 tc_arc_regname_to_dw2regnum (char *regname)
4187 {
4188 struct symbol *sym;
4189
4190 sym = hash_find (arc_reg_hash, regname);
4191 if (sym)
4192 return S_GET_VALUE (sym);
4193
4194 return -1;
4195 }
4196
4197 /* Adjust the symbol table. Delete found AUX register symbols. */
4198
4199 void
4200 arc_adjust_symtab (void)
4201 {
4202 symbolS * sym;
4203
4204 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
4205 {
4206 /* I've created a symbol during parsing process. Now, remove
4207 the symbol as it is found to be an AUX register. */
4208 if (ARC_GET_FLAG (sym) & ARC_FLAG_AUX)
4209 symbol_remove (sym, &symbol_rootP, &symbol_lastP);
4210 }
4211
4212 /* Now do generic ELF adjustments. */
4213 elf_adjust_symtab ();
4214 }
4215
4216 static void
4217 tokenize_extinsn (extInstruction_t *einsn)
4218 {
4219 char *p, c;
4220 char *insn_name;
4221 unsigned char major_opcode;
4222 unsigned char sub_opcode;
4223 unsigned char syntax_class = 0;
4224 unsigned char syntax_class_modifiers = 0;
4225 unsigned char suffix_class = 0;
4226 unsigned int i;
4227
4228 SKIP_WHITESPACE ();
4229
4230 /* 1st: get instruction name. */
4231 p = input_line_pointer;
4232 c = get_symbol_name (&p);
4233
4234 insn_name = xstrdup (p);
4235 restore_line_pointer (c);
4236
4237 /* 2nd: get major opcode. */
4238 if (*input_line_pointer != ',')
4239 {
4240 as_bad (_("expected comma after instruction name"));
4241 ignore_rest_of_line ();
4242 return;
4243 }
4244 input_line_pointer++;
4245 major_opcode = get_absolute_expression ();
4246
4247 /* 3rd: get sub-opcode. */
4248 SKIP_WHITESPACE ();
4249
4250 if (*input_line_pointer != ',')
4251 {
4252 as_bad (_("expected comma after major opcode"));
4253 ignore_rest_of_line ();
4254 return;
4255 }
4256 input_line_pointer++;
4257 sub_opcode = get_absolute_expression ();
4258
4259 /* 4th: get suffix class. */
4260 SKIP_WHITESPACE ();
4261
4262 if (*input_line_pointer != ',')
4263 {
4264 as_bad ("expected comma after sub opcode");
4265 ignore_rest_of_line ();
4266 return;
4267 }
4268 input_line_pointer++;
4269
4270 while (1)
4271 {
4272 SKIP_WHITESPACE ();
4273
4274 for (i = 0; i < ARRAY_SIZE (suffixclass); i++)
4275 {
4276 if (!strncmp (suffixclass[i].name, input_line_pointer,
4277 suffixclass[i].len))
4278 {
4279 suffix_class |= suffixclass[i].attr_class;
4280 input_line_pointer += suffixclass[i].len;
4281 break;
4282 }
4283 }
4284
4285 if (i == ARRAY_SIZE (suffixclass))
4286 {
4287 as_bad ("invalid suffix class");
4288 ignore_rest_of_line ();
4289 return;
4290 }
4291
4292 SKIP_WHITESPACE ();
4293
4294 if (*input_line_pointer == '|')
4295 input_line_pointer++;
4296 else
4297 break;
4298 }
4299
4300 /* 5th: get syntax class and syntax class modifiers. */
4301 if (*input_line_pointer != ',')
4302 {
4303 as_bad ("expected comma after suffix class");
4304 ignore_rest_of_line ();
4305 return;
4306 }
4307 input_line_pointer++;
4308
4309 while (1)
4310 {
4311 SKIP_WHITESPACE ();
4312
4313 for (i = 0; i < ARRAY_SIZE (syntaxclassmod); i++)
4314 {
4315 if (!strncmp (syntaxclassmod[i].name,
4316 input_line_pointer,
4317 syntaxclassmod[i].len))
4318 {
4319 syntax_class_modifiers |= syntaxclassmod[i].attr_class;
4320 input_line_pointer += syntaxclassmod[i].len;
4321 break;
4322 }
4323 }
4324
4325 if (i == ARRAY_SIZE (syntaxclassmod))
4326 {
4327 for (i = 0; i < ARRAY_SIZE (syntaxclass); i++)
4328 {
4329 if (!strncmp (syntaxclass[i].name,
4330 input_line_pointer,
4331 syntaxclass[i].len))
4332 {
4333 syntax_class |= syntaxclass[i].attr_class;
4334 input_line_pointer += syntaxclass[i].len;
4335 break;
4336 }
4337 }
4338
4339 if (i == ARRAY_SIZE (syntaxclass))
4340 {
4341 as_bad ("missing syntax class");
4342 ignore_rest_of_line ();
4343 return;
4344 }
4345 }
4346
4347 SKIP_WHITESPACE ();
4348
4349 if (*input_line_pointer == '|')
4350 input_line_pointer++;
4351 else
4352 break;
4353 }
4354
4355 demand_empty_rest_of_line ();
4356
4357 einsn->name = insn_name;
4358 einsn->major = major_opcode;
4359 einsn->minor = sub_opcode;
4360 einsn->syntax = syntax_class;
4361 einsn->modsyn = syntax_class_modifiers;
4362 einsn->suffix = suffix_class;
4363 einsn->flags = syntax_class
4364 | (syntax_class_modifiers & ARC_OP1_IMM_IMPLIED ? 0x10 : 0);
4365 }
4366
4367 /* Generate an extension section. */
4368
4369 static int
4370 arc_set_ext_seg (void)
4371 {
4372 if (!arcext_section)
4373 {
4374 arcext_section = subseg_new (".arcextmap", 0);
4375 bfd_set_section_flags (stdoutput, arcext_section,
4376 SEC_READONLY | SEC_HAS_CONTENTS);
4377 }
4378 else
4379 subseg_set (arcext_section, 0);
4380 return 1;
4381 }
4382
4383 /* Create an extension instruction description in the arc extension
4384 section of the output file.
4385 The structure for an instruction is like this:
4386 [0]: Length of the record.
4387 [1]: Type of the record.
4388
4389 [2]: Major opcode.
4390 [3]: Sub-opcode.
4391 [4]: Syntax (flags).
4392 [5]+ Name instruction.
4393
4394 The sequence is terminated by an empty entry. */
4395
4396 static void
4397 create_extinst_section (extInstruction_t *einsn)
4398 {
4399
4400 segT old_sec = now_seg;
4401 int old_subsec = now_subseg;
4402 char *p;
4403 int name_len = strlen (einsn->name);
4404
4405 arc_set_ext_seg ();
4406
4407 p = frag_more (1);
4408 *p = 5 + name_len + 1;
4409 p = frag_more (1);
4410 *p = EXT_INSTRUCTION;
4411 p = frag_more (1);
4412 *p = einsn->major;
4413 p = frag_more (1);
4414 *p = einsn->minor;
4415 p = frag_more (1);
4416 *p = einsn->flags;
4417 p = frag_more (name_len + 1);
4418 strcpy (p, einsn->name);
4419
4420 subseg_set (old_sec, old_subsec);
4421 }
4422
4423 /* Handler .extinstruction pseudo-op. */
4424
4425 static void
4426 arc_extinsn (int ignore ATTRIBUTE_UNUSED)
4427 {
4428 extInstruction_t einsn;
4429 struct arc_opcode *arc_ext_opcodes;
4430 const char *errmsg = NULL;
4431 unsigned char moplow, mophigh;
4432
4433 memset (&einsn, 0, sizeof (einsn));
4434 tokenize_extinsn (&einsn);
4435
4436 /* Check if the name is already used. */
4437 if (arc_find_opcode (einsn.name))
4438 as_warn (_("Pseudocode already used %s"), einsn.name);
4439
4440 /* Check the opcode ranges. */
4441 moplow = 0x05;
4442 mophigh = (selected_cpu.flags & (ARC_OPCODE_ARCv2EM
4443 | ARC_OPCODE_ARCv2HS)) ? 0x07 : 0x0a;
4444
4445 if ((einsn.major > mophigh) || (einsn.major < moplow))
4446 as_fatal (_("major opcode not in range [0x%02x - 0x%02x]"), moplow, mophigh);
4447
4448 if ((einsn.minor > 0x3f) && (einsn.major != 0x0a)
4449 && (einsn.major != 5) && (einsn.major != 9))
4450 as_fatal (_("minor opcode not in range [0x00 - 0x3f]"));
4451
4452 switch (einsn.syntax & ARC_SYNTAX_MASK)
4453 {
4454 case ARC_SYNTAX_3OP:
4455 if (einsn.modsyn & ARC_OP1_IMM_IMPLIED)
4456 as_fatal (_("Improper use of OP1_IMM_IMPLIED"));
4457 break;
4458 case ARC_SYNTAX_2OP:
4459 case ARC_SYNTAX_1OP:
4460 case ARC_SYNTAX_NOP:
4461 if (einsn.modsyn & ARC_OP1_MUST_BE_IMM)
4462 as_fatal (_("Improper use of OP1_MUST_BE_IMM"));
4463 break;
4464 default:
4465 break;
4466 }
4467
4468 arc_ext_opcodes = arcExtMap_genOpcode (&einsn, selected_cpu.flags, &errmsg);
4469 if (arc_ext_opcodes == NULL)
4470 {
4471 if (errmsg)
4472 as_fatal ("%s", errmsg);
4473 else
4474 as_fatal (_("Couldn't generate extension instruction opcodes"));
4475 }
4476 else if (errmsg)
4477 as_warn ("%s", errmsg);
4478
4479 /* Insert the extension instruction. */
4480 arc_insert_opcode ((const struct arc_opcode *) arc_ext_opcodes);
4481
4482 create_extinst_section (&einsn);
4483 }
4484
4485 static void
4486 tokenize_extregister (extRegister_t *ereg, int opertype)
4487 {
4488 char *name;
4489 char *mode;
4490 char c;
4491 char *p;
4492 int number, imode = 0;
4493 bfd_boolean isCore_p = (opertype == EXT_CORE_REGISTER) ? TRUE : FALSE;
4494 bfd_boolean isReg_p = (opertype == EXT_CORE_REGISTER
4495 || opertype == EXT_AUX_REGISTER) ? TRUE : FALSE;
4496
4497 /* 1st: get register name. */
4498 SKIP_WHITESPACE ();
4499 p = input_line_pointer;
4500 c = get_symbol_name (&p);
4501
4502 name = xstrdup (p);
4503 restore_line_pointer (c);
4504
4505 /* 2nd: get register number. */
4506 SKIP_WHITESPACE ();
4507
4508 if (*input_line_pointer != ',')
4509 {
4510 as_bad (_("expected comma after register name"));
4511 ignore_rest_of_line ();
4512 free (name);
4513 return;
4514 }
4515 input_line_pointer++;
4516 number = get_absolute_expression ();
4517
4518 if (number < 0)
4519 {
4520 as_bad (_("negative operand number %d"), number);
4521 ignore_rest_of_line ();
4522 free (name);
4523 return;
4524 }
4525
4526 if (isReg_p)
4527 {
4528 /* 3rd: get register mode. */
4529 SKIP_WHITESPACE ();
4530
4531 if (*input_line_pointer != ',')
4532 {
4533 as_bad (_("expected comma after register number"));
4534 ignore_rest_of_line ();
4535 free (name);
4536 return;
4537 }
4538
4539 input_line_pointer++;
4540 mode = input_line_pointer;
4541
4542 if (!strncmp (mode, "r|w", 3))
4543 {
4544 imode = 0;
4545 input_line_pointer += 3;
4546 }
4547 else if (!strncmp (mode, "r", 1))
4548 {
4549 imode = ARC_REGISTER_READONLY;
4550 input_line_pointer += 1;
4551 }
4552 else if (strncmp (mode, "w", 1))
4553 {
4554 as_bad (_("invalid mode"));
4555 ignore_rest_of_line ();
4556 free (name);
4557 return;
4558 }
4559 else
4560 {
4561 imode = ARC_REGISTER_WRITEONLY;
4562 input_line_pointer += 1;
4563 }
4564 }
4565
4566 if (isCore_p)
4567 {
4568 /* 4th: get core register shortcut. */
4569 SKIP_WHITESPACE ();
4570 if (*input_line_pointer != ',')
4571 {
4572 as_bad (_("expected comma after register mode"));
4573 ignore_rest_of_line ();
4574 free (name);
4575 return;
4576 }
4577
4578 input_line_pointer++;
4579
4580 if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
4581 {
4582 imode |= ARC_REGISTER_NOSHORT_CUT;
4583 input_line_pointer += 15;
4584 }
4585 else if (strncmp (input_line_pointer, "can_shortcut", 12))
4586 {
4587 as_bad (_("shortcut designator invalid"));
4588 ignore_rest_of_line ();
4589 free (name);
4590 return;
4591 }
4592 else
4593 {
4594 input_line_pointer += 12;
4595 }
4596 }
4597 demand_empty_rest_of_line ();
4598
4599 ereg->name = name;
4600 ereg->number = number;
4601 ereg->imode = imode;
4602 }
4603
4604 /* Create an extension register/condition description in the arc
4605 extension section of the output file.
4606
4607 The structure for an instruction is like this:
4608 [0]: Length of the record.
4609 [1]: Type of the record.
4610
4611 For core regs and condition codes:
4612 [2]: Value.
4613 [3]+ Name.
4614
4615 For auxilirary registers:
4616 [2..5]: Value.
4617 [6]+ Name
4618
4619 The sequence is terminated by an empty entry. */
4620
4621 static void
4622 create_extcore_section (extRegister_t *ereg, int opertype)
4623 {
4624 segT old_sec = now_seg;
4625 int old_subsec = now_subseg;
4626 char *p;
4627 int name_len = strlen (ereg->name);
4628
4629 arc_set_ext_seg ();
4630
4631 switch (opertype)
4632 {
4633 case EXT_COND_CODE:
4634 case EXT_CORE_REGISTER:
4635 p = frag_more (1);
4636 *p = 3 + name_len + 1;
4637 p = frag_more (1);
4638 *p = opertype;
4639 p = frag_more (1);
4640 *p = ereg->number;
4641 break;
4642 case EXT_AUX_REGISTER:
4643 p = frag_more (1);
4644 *p = 6 + name_len + 1;
4645 p = frag_more (1);
4646 *p = EXT_AUX_REGISTER;
4647 p = frag_more (1);
4648 *p = (ereg->number >> 24) & 0xff;
4649 p = frag_more (1);
4650 *p = (ereg->number >> 16) & 0xff;
4651 p = frag_more (1);
4652 *p = (ereg->number >> 8) & 0xff;
4653 p = frag_more (1);
4654 *p = (ereg->number) & 0xff;
4655 break;
4656 default:
4657 break;
4658 }
4659
4660 p = frag_more (name_len + 1);
4661 strcpy (p, ereg->name);
4662
4663 subseg_set (old_sec, old_subsec);
4664 }
4665
4666 /* Handler .extCoreRegister pseudo-op. */
4667
4668 static void
4669 arc_extcorereg (int opertype)
4670 {
4671 extRegister_t ereg;
4672 struct arc_aux_reg *auxr;
4673 const char *retval;
4674 struct arc_flag_operand *ccode;
4675
4676 memset (&ereg, 0, sizeof (ereg));
4677 tokenize_extregister (&ereg, opertype);
4678
4679 switch (opertype)
4680 {
4681 case EXT_CORE_REGISTER:
4682 /* Core register. */
4683 if (ereg.number > 60)
4684 as_bad (_("core register %s value (%d) too large"), ereg.name,
4685 ereg.number);
4686 declare_register (ereg.name, ereg.number);
4687 break;
4688 case EXT_AUX_REGISTER:
4689 /* Auxiliary register. */
4690 auxr = XNEW (struct arc_aux_reg);
4691 auxr->name = ereg.name;
4692 auxr->cpu = selected_cpu.flags;
4693 auxr->subclass = NONE;
4694 auxr->address = ereg.number;
4695 retval = hash_insert (arc_aux_hash, auxr->name, (void *) auxr);
4696 if (retval)
4697 as_fatal (_("internal error: can't hash aux register '%s': %s"),
4698 auxr->name, retval);
4699 break;
4700 case EXT_COND_CODE:
4701 /* Condition code. */
4702 if (ereg.number > 31)
4703 as_bad (_("condition code %s value (%d) too large"), ereg.name,
4704 ereg.number);
4705 ext_condcode.size ++;
4706 ext_condcode.arc_ext_condcode =
4707 XRESIZEVEC (struct arc_flag_operand, ext_condcode.arc_ext_condcode,
4708 ext_condcode.size + 1);
4709 if (ext_condcode.arc_ext_condcode == NULL)
4710 as_fatal (_("Virtual memory exhausted"));
4711
4712 ccode = ext_condcode.arc_ext_condcode + ext_condcode.size - 1;
4713 ccode->name = ereg.name;
4714 ccode->code = ereg.number;
4715 ccode->bits = 5;
4716 ccode->shift = 0;
4717 ccode->favail = 0; /* not used. */
4718 ccode++;
4719 memset (ccode, 0, sizeof (struct arc_flag_operand));
4720 break;
4721 default:
4722 as_bad (_("Unknown extension"));
4723 break;
4724 }
4725 create_extcore_section (&ereg, opertype);
4726 }
4727
4728 /* Local variables:
4729 eval: (c-set-style "gnu")
4730 indent-tabs-mode: t
4731 End: */
GDB Binutils - Deliverables
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