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Throw NOT_AVAILABLE_ERROR in read_stack and read_code
[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 /* Enum used to enumerate the relaxable ins operands. */
55 enum rlx_operand_type
56 {
57 EMPTY = 0,
58 REGISTER,
59 REGISTER_S, /* Register for short instruction(s). */
60 REGISTER_NO_GP, /* Is a register but not gp register specifically. */
61 REGISTER_DUP, /* Duplication of previous operand of type register. */
62 IMMEDIATE,
63 BRACKET
64 };
65
66 enum arc_rlx_types
67 {
68 ARC_RLX_NONE = 0,
69 ARC_RLX_BL_S,
70 ARC_RLX_BL,
71 ARC_RLX_B_S,
72 ARC_RLX_B,
73 ARC_RLX_ADD_U3,
74 ARC_RLX_ADD_U6,
75 ARC_RLX_ADD_LIMM,
76 ARC_RLX_LD_U7,
77 ARC_RLX_LD_S9,
78 ARC_RLX_LD_LIMM,
79 ARC_RLX_MOV_U8,
80 ARC_RLX_MOV_S12,
81 ARC_RLX_MOV_LIMM,
82 ARC_RLX_SUB_U3,
83 ARC_RLX_SUB_U6,
84 ARC_RLX_SUB_LIMM,
85 ARC_RLX_MPY_U6,
86 ARC_RLX_MPY_LIMM,
87 ARC_RLX_MOV_RU6,
88 ARC_RLX_MOV_RLIMM,
89 ARC_RLX_ADD_RRU6,
90 ARC_RLX_ADD_RRLIMM,
91 };
92
93 /* Macros section. */
94
95 #define regno(x) ((x) & 0x3F)
96 #define is_ir_num(x) (((x) & ~0x3F) == 0)
97 #define is_code_density_p(sc) (((sc) == CD1 || (sc) == CD2))
98 #define is_spfp_p(op) (((sc) == SPX))
99 #define is_dpfp_p(op) (((sc) == DPX))
100 #define is_fpuda_p(op) (((sc) == DPA))
101 #define is_br_jmp_insn_p(op) (((op)->class == BRANCH || (op)->class == JUMP))
102 #define is_kernel_insn_p(op) (((op)->class == KERNEL))
103
104 /* Generic assembler global variables which must be defined by all
105 targets. */
106
107 /* Characters which always start a comment. */
108 const char comment_chars[] = "#;";
109
110 /* Characters which start a comment at the beginning of a line. */
111 const char line_comment_chars[] = "#";
112
113 /* Characters which may be used to separate multiple commands on a
114 single line. */
115 const char line_separator_chars[] = "`";
116
117 /* Characters which are used to indicate an exponent in a floating
118 point number. */
119 const char EXP_CHARS[] = "eE";
120
121 /* Chars that mean this number is a floating point constant
122 As in 0f12.456 or 0d1.2345e12. */
123 const char FLT_CHARS[] = "rRsSfFdD";
124
125 /* Byte order. */
126 extern int target_big_endian;
127 const char *arc_target_format = DEFAULT_TARGET_FORMAT;
128 static int byte_order = DEFAULT_BYTE_ORDER;
129
130 /* Arc extension section. */
131 static segT arcext_section;
132
133 /* By default relaxation is disabled. */
134 static int relaxation_state = 0;
135
136 extern int arc_get_mach (char *);
137
138 /* Forward declarations. */
139 static void arc_lcomm (int);
140 static void arc_option (int);
141 static void arc_extra_reloc (int);
142 static void arc_extinsn (int);
143 static void arc_extcorereg (int);
144
145 const pseudo_typeS md_pseudo_table[] =
146 {
147 /* Make sure that .word is 32 bits. */
148 { "word", cons, 4 },
149
150 { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */
151 { "lcomm", arc_lcomm, 0 },
152 { "lcommon", arc_lcomm, 0 },
153 { "cpu", arc_option, 0 },
154
155 { "extinstruction", arc_extinsn, 0 },
156 { "extcoreregister", arc_extcorereg, EXT_CORE_REGISTER },
157 { "extauxregister", arc_extcorereg, EXT_AUX_REGISTER },
158 { "extcondcode", arc_extcorereg, EXT_COND_CODE },
159
160 { "tls_gd_ld", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_LD },
161 { "tls_gd_call", arc_extra_reloc, BFD_RELOC_ARC_TLS_GD_CALL },
162
163 { NULL, NULL, 0 }
164 };
165
166 const char *md_shortopts = "";
167
168 enum options
169 {
170 OPTION_EB = OPTION_MD_BASE,
171 OPTION_EL,
172
173 OPTION_ARC600,
174 OPTION_ARC601,
175 OPTION_ARC700,
176 OPTION_ARCEM,
177 OPTION_ARCHS,
178
179 OPTION_MCPU,
180 OPTION_CD,
181 OPTION_RELAX,
182
183 /* The following options are deprecated and provided here only for
184 compatibility reasons. */
185 OPTION_USER_MODE,
186 OPTION_LD_EXT_MASK,
187 OPTION_SWAP,
188 OPTION_NORM,
189 OPTION_BARREL_SHIFT,
190 OPTION_MIN_MAX,
191 OPTION_NO_MPY,
192 OPTION_EA,
193 OPTION_MUL64,
194 OPTION_SIMD,
195 OPTION_SPFP,
196 OPTION_DPFP,
197 OPTION_XMAC_D16,
198 OPTION_XMAC_24,
199 OPTION_DSP_PACKA,
200 OPTION_CRC,
201 OPTION_DVBF,
202 OPTION_TELEPHONY,
203 OPTION_XYMEMORY,
204 OPTION_LOCK,
205 OPTION_SWAPE,
206 OPTION_RTSC,
207 OPTION_FPUDA
208 };
209
210 struct option md_longopts[] =
211 {
212 { "EB", no_argument, NULL, OPTION_EB },
213 { "EL", no_argument, NULL, OPTION_EL },
214 { "mcpu", required_argument, NULL, OPTION_MCPU },
215 { "mA6", no_argument, NULL, OPTION_ARC600 },
216 { "mARC600", no_argument, NULL, OPTION_ARC600 },
217 { "mARC601", no_argument, NULL, OPTION_ARC601 },
218 { "mARC700", no_argument, NULL, OPTION_ARC700 },
219 { "mA7", no_argument, NULL, OPTION_ARC700 },
220 { "mEM", no_argument, NULL, OPTION_ARCEM },
221 { "mHS", no_argument, NULL, OPTION_ARCHS },
222 { "mcode-density", no_argument, NULL, OPTION_CD },
223 { "mrelax", no_argument, NULL, OPTION_RELAX },
224
225 /* The following options are deprecated and provided here only for
226 compatibility reasons. */
227 { "mav2em", no_argument, NULL, OPTION_ARCEM },
228 { "mav2hs", no_argument, NULL, OPTION_ARCHS },
229 { "muser-mode-only", no_argument, NULL, OPTION_USER_MODE },
230 { "mld-extension-reg-mask", required_argument, NULL, OPTION_LD_EXT_MASK },
231 { "mswap", no_argument, NULL, OPTION_SWAP },
232 { "mnorm", no_argument, NULL, OPTION_NORM },
233 { "mbarrel-shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
234 { "mbarrel_shifter", no_argument, NULL, OPTION_BARREL_SHIFT },
235 { "mmin-max", no_argument, NULL, OPTION_MIN_MAX },
236 { "mmin_max", no_argument, NULL, OPTION_MIN_MAX },
237 { "mno-mpy", no_argument, NULL, OPTION_NO_MPY },
238 { "mea", no_argument, NULL, OPTION_EA },
239 { "mEA", no_argument, NULL, OPTION_EA },
240 { "mmul64", no_argument, NULL, OPTION_MUL64 },
241 { "msimd", no_argument, NULL, OPTION_SIMD},
242 { "mspfp", no_argument, NULL, OPTION_SPFP},
243 { "mspfp-compact", no_argument, NULL, OPTION_SPFP},
244 { "mspfp_compact", no_argument, NULL, OPTION_SPFP},
245 { "mspfp-fast", no_argument, NULL, OPTION_SPFP},
246 { "mspfp_fast", no_argument, NULL, OPTION_SPFP},
247 { "mdpfp", no_argument, NULL, OPTION_DPFP},
248 { "mdpfp-compact", no_argument, NULL, OPTION_DPFP},
249 { "mdpfp_compact", no_argument, NULL, OPTION_DPFP},
250 { "mdpfp-fast", no_argument, NULL, OPTION_DPFP},
251 { "mdpfp_fast", no_argument, NULL, OPTION_DPFP},
252 { "mmac-d16", no_argument, NULL, OPTION_XMAC_D16},
253 { "mmac_d16", no_argument, NULL, OPTION_XMAC_D16},
254 { "mmac-24", no_argument, NULL, OPTION_XMAC_24},
255 { "mmac_24", no_argument, NULL, OPTION_XMAC_24},
256 { "mdsp-packa", no_argument, NULL, OPTION_DSP_PACKA},
257 { "mdsp_packa", no_argument, NULL, OPTION_DSP_PACKA},
258 { "mcrc", no_argument, NULL, OPTION_CRC},
259 { "mdvbf", no_argument, NULL, OPTION_DVBF},
260 { "mtelephony", no_argument, NULL, OPTION_TELEPHONY},
261 { "mxy", no_argument, NULL, OPTION_XYMEMORY},
262 { "mlock", no_argument, NULL, OPTION_LOCK},
263 { "mswape", no_argument, NULL, OPTION_SWAPE},
264 { "mrtsc", no_argument, NULL, OPTION_RTSC},
265 { "mfpuda", no_argument, NULL, OPTION_FPUDA},
266
267 { NULL, no_argument, NULL, 0 }
268 };
269
270 size_t md_longopts_size = sizeof (md_longopts);
271
272 /* Local data and data types. */
273
274 /* Used since new relocation types are introduced in this
275 file (DUMMY_RELOC_LITUSE_*). */
276 typedef int extended_bfd_reloc_code_real_type;
277
278 struct arc_fixup
279 {
280 expressionS exp;
281
282 extended_bfd_reloc_code_real_type reloc;
283
284 /* index into arc_operands. */
285 unsigned int opindex;
286
287 /* PC-relative, used by internals fixups. */
288 unsigned char pcrel;
289
290 /* TRUE if this fixup is for LIMM operand. */
291 bfd_boolean islong;
292 };
293
294 struct arc_insn
295 {
296 unsigned int insn;
297 int nfixups;
298 struct arc_fixup fixups[MAX_INSN_FIXUPS];
299 long limm;
300 bfd_boolean short_insn; /* Boolean value: TRUE if current insn is
301 short. */
302 bfd_boolean has_limm; /* Boolean value: TRUE if limm field is
303 valid. */
304 bfd_boolean relax; /* Boolean value: TRUE if needs
305 relaxation. */
306 };
307
308 /* Structure to hold any last two instructions. */
309 static struct arc_last_insn
310 {
311 /* Saved instruction opcode. */
312 const struct arc_opcode *opcode;
313
314 /* Boolean value: TRUE if current insn is short. */
315 bfd_boolean has_limm;
316
317 /* Boolean value: TRUE if current insn has delay slot. */
318 bfd_boolean has_delay_slot;
319 } arc_last_insns[2];
320
321 /* Extension instruction suffix classes. */
322 typedef struct
323 {
324 const char *name;
325 int len;
326 int class;
327 } attributes_t;
328
329 static const attributes_t suffixclass[] =
330 {
331 { "SUFFIX_FLAG", 11, ARC_SUFFIX_FLAG },
332 { "SUFFIX_COND", 11, ARC_SUFFIX_COND },
333 { "SUFFIX_NONE", 11, ARC_SUFFIX_NONE }
334 };
335
336 /* Extension instruction syntax classes. */
337 static const attributes_t syntaxclass[] =
338 {
339 { "SYNTAX_3OP", 10, ARC_SYNTAX_3OP },
340 { "SYNTAX_2OP", 10, ARC_SYNTAX_2OP }
341 };
342
343 /* Extension instruction syntax classes modifiers. */
344 static const attributes_t syntaxclassmod[] =
345 {
346 { "OP1_IMM_IMPLIED" , 15, ARC_OP1_IMM_IMPLIED },
347 { "OP1_MUST_BE_IMM" , 15, ARC_OP1_MUST_BE_IMM }
348 };
349
350 /* Extension register type. */
351 typedef struct
352 {
353 char *name;
354 int number;
355 int imode;
356 } extRegister_t;
357
358 /* A structure to hold the additional conditional codes. */
359 static struct
360 {
361 struct arc_flag_operand *arc_ext_condcode;
362 int size;
363 } ext_condcode = { NULL, 0 };
364
365 /* Structure to hold an entry in ARC_OPCODE_HASH. */
366 struct arc_opcode_hash_entry
367 {
368 /* The number of pointers in the OPCODE list. */
369 size_t count;
370
371 /* Points to a list of opcode pointers. */
372 const struct arc_opcode **opcode;
373 };
374
375 /* Structure used for iterating through an arc_opcode_hash_entry. */
376 struct arc_opcode_hash_entry_iterator
377 {
378 /* Index into the OPCODE element of the arc_opcode_hash_entry. */
379 size_t index;
380
381 /* The specific ARC_OPCODE from the ARC_OPCODES table that was last
382 returned by this iterator. */
383 const struct arc_opcode *opcode;
384 };
385
386 /* Forward declaration. */
387 static void assemble_insn
388 (const struct arc_opcode *, const expressionS *, int,
389 const struct arc_flags *, int, struct arc_insn *);
390
391 /* The cpu for which we are generating code. */
392 static unsigned arc_target;
393 static const char *arc_target_name;
394 static unsigned arc_features;
395
396 /* The default architecture. */
397 static int arc_mach_type;
398
399 /* TRUE if the cpu type has been explicitly specified. */
400 static bfd_boolean mach_type_specified_p = FALSE;
401
402 /* The hash table of instruction opcodes. */
403 static struct hash_control *arc_opcode_hash;
404
405 /* The hash table of register symbols. */
406 static struct hash_control *arc_reg_hash;
407
408 /* The hash table of aux register symbols. */
409 static struct hash_control *arc_aux_hash;
410
411 /* A table of CPU names and opcode sets. */
412 static const struct cpu_type
413 {
414 const char *name;
415 unsigned flags;
416 int mach;
417 unsigned eflags;
418 unsigned features;
419 }
420 cpu_types[] =
421 {
422 { "arc600", ARC_OPCODE_ARC600, bfd_mach_arc_arc600,
423 E_ARC_MACH_ARC600, 0x00},
424 { "arc700", ARC_OPCODE_ARC700, bfd_mach_arc_arc700,
425 E_ARC_MACH_ARC700, 0x00},
426 { "nps400", ARC_OPCODE_ARC700 | ARC_OPCODE_NPS400, bfd_mach_arc_nps400,
427 E_ARC_MACH_NPS400, 0x00},
428 { "arcem", ARC_OPCODE_ARCv2EM, bfd_mach_arc_arcv2,
429 EF_ARC_CPU_ARCV2EM, ARC_CD},
430 { "archs", ARC_OPCODE_ARCv2HS, bfd_mach_arc_arcv2,
431 EF_ARC_CPU_ARCV2HS, ARC_CD},
432 { 0, 0, 0, 0, 0 }
433 };
434
435 /* Used by the arc_reloc_op table. Order is important. */
436 #define O_gotoff O_md1 /* @gotoff relocation. */
437 #define O_gotpc O_md2 /* @gotpc relocation. */
438 #define O_plt O_md3 /* @plt relocation. */
439 #define O_sda O_md4 /* @sda relocation. */
440 #define O_pcl O_md5 /* @pcl relocation. */
441 #define O_tlsgd O_md6 /* @tlsgd relocation. */
442 #define O_tlsie O_md7 /* @tlsie relocation. */
443 #define O_tpoff9 O_md8 /* @tpoff9 relocation. */
444 #define O_tpoff O_md9 /* @tpoff relocation. */
445 #define O_dtpoff9 O_md10 /* @dtpoff9 relocation. */
446 #define O_dtpoff O_md11 /* @dtpoff relocation. */
447 #define O_last O_dtpoff
448
449 /* Used to define a bracket as operand in tokens. */
450 #define O_bracket O_md32
451
452 /* Dummy relocation, to be sorted out. */
453 #define DUMMY_RELOC_ARC_ENTRY (BFD_RELOC_UNUSED + 1)
454
455 #define USER_RELOC_P(R) ((R) >= O_gotoff && (R) <= O_last)
456
457 /* A table to map the spelling of a relocation operand into an appropriate
458 bfd_reloc_code_real_type type. The table is assumed to be ordered such
459 that op-O_literal indexes into it. */
460 #define ARC_RELOC_TABLE(op) \
461 (&arc_reloc_op[ ((!USER_RELOC_P (op)) \
462 ? (abort (), 0) \
463 : (int) (op) - (int) O_gotoff) ])
464
465 #define DEF(NAME, RELOC, REQ) \
466 { #NAME, sizeof (#NAME)-1, O_##NAME, RELOC, REQ}
467
468 static const struct arc_reloc_op_tag
469 {
470 /* String to lookup. */
471 const char *name;
472 /* Size of the string. */
473 size_t length;
474 /* Which operator to use. */
475 operatorT op;
476 extended_bfd_reloc_code_real_type reloc;
477 /* Allows complex relocation expression like identifier@reloc +
478 const. */
479 unsigned int complex_expr : 1;
480 }
481 arc_reloc_op[] =
482 {
483 DEF (gotoff, BFD_RELOC_ARC_GOTOFF, 1),
484 DEF (gotpc, BFD_RELOC_ARC_GOTPC32, 0),
485 DEF (plt, BFD_RELOC_ARC_PLT32, 0),
486 DEF (sda, DUMMY_RELOC_ARC_ENTRY, 1),
487 DEF (pcl, BFD_RELOC_ARC_PC32, 1),
488 DEF (tlsgd, BFD_RELOC_ARC_TLS_GD_GOT, 0),
489 DEF (tlsie, BFD_RELOC_ARC_TLS_IE_GOT, 0),
490 DEF (tpoff9, BFD_RELOC_ARC_TLS_LE_S9, 0),
491 DEF (tpoff, BFD_RELOC_ARC_TLS_LE_32, 1),
492 DEF (dtpoff9, BFD_RELOC_ARC_TLS_DTPOFF_S9, 0),
493 DEF (dtpoff, BFD_RELOC_ARC_TLS_DTPOFF, 0),
494 };
495
496 static const int arc_num_reloc_op
497 = sizeof (arc_reloc_op) / sizeof (*arc_reloc_op);
498
499 /* Structure for relaxable instruction that have to be swapped with a
500 smaller alternative instruction. */
501 struct arc_relaxable_ins
502 {
503 /* Mnemonic that should be checked. */
504 const char *mnemonic_r;
505
506 /* Operands that should be checked.
507 Indexes of operands from operand array. */
508 enum rlx_operand_type operands[6];
509
510 /* Flags that should be checked. */
511 unsigned flag_classes[5];
512
513 /* Mnemonic (smaller) alternative to be used later for relaxation. */
514 const char *mnemonic_alt;
515
516 /* Index of operand that generic relaxation has to check. */
517 unsigned opcheckidx;
518
519 /* Base subtype index used. */
520 enum arc_rlx_types subtype;
521 };
522
523 #define RELAX_TABLE_ENTRY(BITS, ISSIGNED, SIZE, NEXT) \
524 { (ISSIGNED) ? ((1 << ((BITS) - 1)) - 1) : ((1 << (BITS)) - 1), \
525 (ISSIGNED) ? -(1 << ((BITS) - 1)) : 0, \
526 (SIZE), \
527 (NEXT) } \
528
529 #define RELAX_TABLE_ENTRY_MAX(ISSIGNED, SIZE, NEXT) \
530 { (ISSIGNED) ? 0x7FFFFFFF : 0xFFFFFFFF, \
531 (ISSIGNED) ? -(0x7FFFFFFF) : 0, \
532 (SIZE), \
533 (NEXT) } \
534
535
536 /* ARC relaxation table. */
537 const relax_typeS md_relax_table[] =
538 {
539 /* Fake entry. */
540 {0, 0, 0, 0},
541
542 /* BL_S s13 ->
543 BL s25. */
544 RELAX_TABLE_ENTRY(13, 1, 2, ARC_RLX_BL),
545 RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
546
547 /* B_S s10 ->
548 B s25. */
549 RELAX_TABLE_ENTRY(10, 1, 2, ARC_RLX_B),
550 RELAX_TABLE_ENTRY(25, 1, 4, ARC_RLX_NONE),
551
552 /* ADD_S c,b, u3 ->
553 ADD<.f> a,b,u6 ->
554 ADD<.f> a,b,limm. */
555 RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_ADD_U6),
556 RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_LIMM),
557 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
558
559 /* LD_S a, [b, u7] ->
560 LD<zz><.x><.aa><.di> a, [b, s9] ->
561 LD<zz><.x><.aa><.di> a, [b, limm] */
562 RELAX_TABLE_ENTRY(7, 0, 2, ARC_RLX_LD_S9),
563 RELAX_TABLE_ENTRY(9, 1, 4, ARC_RLX_LD_LIMM),
564 RELAX_TABLE_ENTRY_MAX(1, 8, ARC_RLX_NONE),
565
566 /* MOV_S b, u8 ->
567 MOV<.f> b, s12 ->
568 MOV<.f> b, limm. */
569 RELAX_TABLE_ENTRY(8, 0, 2, ARC_RLX_MOV_S12),
570 RELAX_TABLE_ENTRY(8, 0, 4, ARC_RLX_MOV_LIMM),
571 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
572
573 /* SUB_S c, b, u3 ->
574 SUB<.f> a, b, u6 ->
575 SUB<.f> a, b, limm. */
576 RELAX_TABLE_ENTRY(3, 0, 2, ARC_RLX_SUB_U6),
577 RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_SUB_LIMM),
578 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
579
580 /* MPY<.f> a, b, u6 ->
581 MPY<.f> a, b, limm. */
582 RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MPY_LIMM),
583 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
584
585 /* MOV<.f><.cc> b, u6 ->
586 MOV<.f><.cc> b, limm. */
587 RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_MOV_RLIMM),
588 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
589
590 /* ADD<.f><.cc> b, b, u6 ->
591 ADD<.f><.cc> b, b, limm. */
592 RELAX_TABLE_ENTRY(6, 0, 4, ARC_RLX_ADD_RRLIMM),
593 RELAX_TABLE_ENTRY_MAX(0, 8, ARC_RLX_NONE),
594 };
595
596 /* Order of this table's entries matters! */
597 const struct arc_relaxable_ins arc_relaxable_insns[] =
598 {
599 { "bl", { IMMEDIATE }, { 0 }, "bl_s", 0, ARC_RLX_BL_S },
600 { "b", { IMMEDIATE }, { 0 }, "b_s", 0, ARC_RLX_B_S },
601 { "add", { REGISTER, REGISTER_DUP, IMMEDIATE }, { 5, 1, 0 }, "add",
602 2, ARC_RLX_ADD_RRU6},
603 { "add", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "add_s", 2,
604 ARC_RLX_ADD_U3 },
605 { "add", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "add", 2,
606 ARC_RLX_ADD_U6 },
607 { "ld", { REGISTER_S, BRACKET, REGISTER_S, IMMEDIATE, BRACKET },
608 { 0 }, "ld_s", 3, ARC_RLX_LD_U7 },
609 { "ld", { REGISTER, BRACKET, REGISTER_NO_GP, IMMEDIATE, BRACKET },
610 { 11, 4, 14, 17, 0 }, "ld", 3, ARC_RLX_LD_S9 },
611 { "mov", { REGISTER_S, IMMEDIATE }, { 0 }, "mov_s", 1, ARC_RLX_MOV_U8 },
612 { "mov", { REGISTER, IMMEDIATE }, { 5, 0 }, "mov", 1, ARC_RLX_MOV_S12 },
613 { "mov", { REGISTER, IMMEDIATE }, { 5, 1, 0 },"mov", 1, ARC_RLX_MOV_RU6 },
614 { "sub", { REGISTER_S, REGISTER_S, IMMEDIATE }, { 0 }, "sub_s", 2,
615 ARC_RLX_SUB_U3 },
616 { "sub", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "sub", 2,
617 ARC_RLX_SUB_U6 },
618 { "mpy", { REGISTER, REGISTER, IMMEDIATE }, { 5, 0 }, "mpy", 2,
619 ARC_RLX_MPY_U6 },
620 };
621
622 const unsigned arc_num_relaxable_ins = ARRAY_SIZE (arc_relaxable_insns);
623
624 /* Flags to set in the elf header. */
625 static flagword arc_eflag = 0x00;
626
627 /* Pre-defined "_GLOBAL_OFFSET_TABLE_". */
628 symbolS * GOT_symbol = 0;
629
630 /* Set to TRUE when we assemble instructions. */
631 static bfd_boolean assembling_insn = FALSE;
632
633 /* Functions implementation. */
634
635 /* Return a pointer to ARC_OPCODE_HASH_ENTRY that identifies all
636 ARC_OPCODE entries in ARC_OPCODE_HASH that match NAME, or NULL if there
637 are no matching entries in ARC_OPCODE_HASH. */
638
639 static const struct arc_opcode_hash_entry *
640 arc_find_opcode (const char *name)
641 {
642 const struct arc_opcode_hash_entry *entry;
643
644 entry = hash_find (arc_opcode_hash, name);
645 return entry;
646 }
647
648 /* Initialise the iterator ITER. */
649
650 static void
651 arc_opcode_hash_entry_iterator_init (struct arc_opcode_hash_entry_iterator *iter)
652 {
653 iter->index = 0;
654 iter->opcode = NULL;
655 }
656
657 /* Return the next ARC_OPCODE from ENTRY, using ITER to hold state between
658 calls to this function. Return NULL when all ARC_OPCODE entries have
659 been returned. */
660
661 static const struct arc_opcode *
662 arc_opcode_hash_entry_iterator_next (const struct arc_opcode_hash_entry *entry,
663 struct arc_opcode_hash_entry_iterator *iter)
664 {
665 if (iter->opcode == NULL && iter->index == 0)
666 {
667 gas_assert (entry->count > 0);
668 iter->opcode = entry->opcode[iter->index];
669 }
670 else if (iter->opcode != NULL)
671 {
672 const char *old_name = iter->opcode->name;
673
674 iter->opcode++;
675 if (iter->opcode->name
676 && (strcmp (old_name, iter->opcode->name) != 0))
677 {
678 iter->index++;
679 if (iter->index == entry->count)
680 iter->opcode = NULL;
681 else
682 iter->opcode = entry->opcode[iter->index];
683 }
684 }
685
686 return iter->opcode;
687 }
688
689 /* Insert an opcode into opcode hash structure. */
690
691 static void
692 arc_insert_opcode (const struct arc_opcode *opcode)
693 {
694 const char *name, *retval;
695 struct arc_opcode_hash_entry *entry;
696 name = opcode->name;
697
698 entry = hash_find (arc_opcode_hash, name);
699 if (entry == NULL)
700 {
701 entry = xmalloc (sizeof (*entry));
702 entry->count = 0;
703 entry->opcode = NULL;
704
705 retval = hash_insert (arc_opcode_hash, name, (void *) entry);
706 if (retval)
707 as_fatal (_("internal error: can't hash opcode '%s': %s"),
708 name, retval);
709 }
710
711 entry->opcode = xrealloc (entry->opcode,
712 sizeof (const struct arc_opcode *)
713 * (entry->count + 1));
714
715 if (entry->opcode == NULL)
716 as_fatal (_("Virtual memory exhausted"));
717
718 entry->opcode[entry->count] = opcode;
719 entry->count++;
720 }
721
722
723 /* Like md_number_to_chars but used for limms. The 4-byte limm value,
724 is encoded as 'middle-endian' for a little-endian target. FIXME!
725 this function is used for regular 4 byte instructions as well. */
726
727 static void
728 md_number_to_chars_midend (char *buf, valueT val, int n)
729 {
730 if (n == 4)
731 {
732 md_number_to_chars (buf, (val & 0xffff0000) >> 16, 2);
733 md_number_to_chars (buf + 2, (val & 0xffff), 2);
734 }
735 else
736 {
737 md_number_to_chars (buf, val, n);
738 }
739 }
740
741 /* Select an appropriate entry from CPU_TYPES based on ARG and initialise
742 the relevant static global variables. */
743
744 static void
745 arc_select_cpu (const char *arg)
746 {
747 int cpu_flags = 0;
748 int i;
749
750 for (i = 0; cpu_types[i].name; ++i)
751 {
752 if (!strcasecmp (cpu_types[i].name, arg))
753 {
754 arc_target = cpu_types[i].flags;
755 arc_target_name = cpu_types[i].name;
756 arc_features = cpu_types[i].features;
757 arc_mach_type = cpu_types[i].mach;
758 cpu_flags = cpu_types[i].eflags;
759 break;
760 }
761 }
762
763 if (!cpu_types[i].name)
764 as_fatal (_("unknown architecture: %s\n"), arg);
765 gas_assert (cpu_flags != 0);
766 arc_eflag = (arc_eflag & ~EF_ARC_MACH_MSK) | cpu_flags;
767 }
768
769 /* Here ends all the ARCompact extension instruction assembling
770 stuff. */
771
772 static void
773 arc_extra_reloc (int r_type)
774 {
775 char *sym_name, c;
776 symbolS *sym, *lab = NULL;
777
778 if (*input_line_pointer == '@')
779 input_line_pointer++;
780 c = get_symbol_name (&sym_name);
781 sym = symbol_find_or_make (sym_name);
782 restore_line_pointer (c);
783 if (c == ',' && r_type == BFD_RELOC_ARC_TLS_GD_LD)
784 {
785 ++input_line_pointer;
786 char *lab_name;
787 c = get_symbol_name (&lab_name);
788 lab = symbol_find_or_make (lab_name);
789 restore_line_pointer (c);
790 }
791
792 /* These relocations exist as a mechanism for the compiler to tell the
793 linker how to patch the code if the tls model is optimised. However,
794 the relocation itself does not require any space within the assembler
795 fragment, and so we pass a size of 0.
796
797 The lines that generate these relocations look like this:
798
799 .tls_gd_ld @.tdata`bl __tls_get_addr@plt
800
801 The '.tls_gd_ld @.tdata' is processed first and generates the
802 additional relocation, while the 'bl __tls_get_addr@plt' is processed
803 second and generates the additional branch.
804
805 It is possible that the additional relocation generated by the
806 '.tls_gd_ld @.tdata' will be attached at the very end of one fragment,
807 while the 'bl __tls_get_addr@plt' will be generated as the first thing
808 in the next fragment. This will be fine; both relocations will still
809 appear to be at the same address in the generated object file.
810 However, this only works as the additional relocation is generated
811 with size of 0 bytes. */
812 fixS *fixP
813 = fix_new (frag_now, /* Which frag? */
814 frag_now_fix (), /* Where in that frag? */
815 0, /* size: 1, 2, or 4 usually. */
816 sym, /* X_add_symbol. */
817 0, /* X_add_number. */
818 FALSE, /* TRUE if PC-relative relocation. */
819 r_type /* Relocation type. */);
820 fixP->fx_subsy = lab;
821 }
822
823 static symbolS *
824 arc_lcomm_internal (int ignore ATTRIBUTE_UNUSED,
825 symbolS *symbolP, addressT size)
826 {
827 addressT align = 0;
828 SKIP_WHITESPACE ();
829
830 if (*input_line_pointer == ',')
831 {
832 align = parse_align (1);
833
834 if (align == (addressT) -1)
835 return NULL;
836 }
837 else
838 {
839 if (size >= 8)
840 align = 3;
841 else if (size >= 4)
842 align = 2;
843 else if (size >= 2)
844 align = 1;
845 else
846 align = 0;
847 }
848
849 bss_alloc (symbolP, size, align);
850 S_CLEAR_EXTERNAL (symbolP);
851
852 return symbolP;
853 }
854
855 static void
856 arc_lcomm (int ignore)
857 {
858 symbolS *symbolP = s_comm_internal (ignore, arc_lcomm_internal);
859
860 if (symbolP)
861 symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
862 }
863
864 /* Select the cpu we're assembling for. */
865
866 static void
867 arc_option (int ignore ATTRIBUTE_UNUSED)
868 {
869 int mach = -1;
870 char c;
871 char *cpu;
872
873 c = get_symbol_name (&cpu);
874 mach = arc_get_mach (cpu);
875
876 if (mach == -1)
877 goto bad_cpu;
878
879 if (!mach_type_specified_p)
880 {
881 if ((!strcmp ("ARC600", cpu))
882 || (!strcmp ("ARC601", cpu))
883 || (!strcmp ("A6", cpu)))
884 {
885 md_parse_option (OPTION_MCPU, "arc600");
886 }
887 else if ((!strcmp ("ARC700", cpu))
888 || (!strcmp ("A7", cpu)))
889 {
890 md_parse_option (OPTION_MCPU, "arc700");
891 }
892 else if (!strcmp ("EM", cpu))
893 {
894 md_parse_option (OPTION_MCPU, "arcem");
895 }
896 else if (!strcmp ("HS", cpu))
897 {
898 md_parse_option (OPTION_MCPU, "archs");
899 }
900 else if (!strcmp ("NPS400", cpu))
901 {
902 md_parse_option (OPTION_MCPU, "nps400");
903 }
904 else
905 as_fatal (_("could not find the architecture"));
906
907 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, mach))
908 as_fatal (_("could not set architecture and machine"));
909
910 /* Set elf header flags. */
911 bfd_set_private_flags (stdoutput, arc_eflag);
912 }
913 else
914 if (arc_mach_type != mach)
915 as_warn (_("Command-line value overrides \".cpu\" directive"));
916
917 restore_line_pointer (c);
918 demand_empty_rest_of_line ();
919 return;
920
921 bad_cpu:
922 restore_line_pointer (c);
923 as_bad (_("invalid identifier for \".cpu\""));
924 ignore_rest_of_line ();
925 }
926
927 /* Smartly print an expression. */
928
929 static void
930 debug_exp (expressionS *t)
931 {
932 const char *name ATTRIBUTE_UNUSED;
933 const char *namemd ATTRIBUTE_UNUSED;
934
935 pr_debug ("debug_exp: ");
936
937 switch (t->X_op)
938 {
939 default: name = "unknown"; break;
940 case O_illegal: name = "O_illegal"; break;
941 case O_absent: name = "O_absent"; break;
942 case O_constant: name = "O_constant"; break;
943 case O_symbol: name = "O_symbol"; break;
944 case O_symbol_rva: name = "O_symbol_rva"; break;
945 case O_register: name = "O_register"; break;
946 case O_big: name = "O_big"; break;
947 case O_uminus: name = "O_uminus"; break;
948 case O_bit_not: name = "O_bit_not"; break;
949 case O_logical_not: name = "O_logical_not"; break;
950 case O_multiply: name = "O_multiply"; break;
951 case O_divide: name = "O_divide"; break;
952 case O_modulus: name = "O_modulus"; break;
953 case O_left_shift: name = "O_left_shift"; break;
954 case O_right_shift: name = "O_right_shift"; break;
955 case O_bit_inclusive_or: name = "O_bit_inclusive_or"; break;
956 case O_bit_or_not: name = "O_bit_or_not"; break;
957 case O_bit_exclusive_or: name = "O_bit_exclusive_or"; break;
958 case O_bit_and: name = "O_bit_and"; break;
959 case O_add: name = "O_add"; break;
960 case O_subtract: name = "O_subtract"; break;
961 case O_eq: name = "O_eq"; break;
962 case O_ne: name = "O_ne"; break;
963 case O_lt: name = "O_lt"; break;
964 case O_le: name = "O_le"; break;
965 case O_ge: name = "O_ge"; break;
966 case O_gt: name = "O_gt"; break;
967 case O_logical_and: name = "O_logical_and"; break;
968 case O_logical_or: name = "O_logical_or"; break;
969 case O_index: name = "O_index"; break;
970 case O_bracket: name = "O_bracket"; break;
971 }
972
973 switch (t->X_md)
974 {
975 default: namemd = "unknown"; break;
976 case O_gotoff: namemd = "O_gotoff"; break;
977 case O_gotpc: namemd = "O_gotpc"; break;
978 case O_plt: namemd = "O_plt"; break;
979 case O_sda: namemd = "O_sda"; break;
980 case O_pcl: namemd = "O_pcl"; break;
981 case O_tlsgd: namemd = "O_tlsgd"; break;
982 case O_tlsie: namemd = "O_tlsie"; break;
983 case O_tpoff9: namemd = "O_tpoff9"; break;
984 case O_tpoff: namemd = "O_tpoff"; break;
985 case O_dtpoff9: namemd = "O_dtpoff9"; break;
986 case O_dtpoff: namemd = "O_dtpoff"; break;
987 }
988
989 pr_debug ("%s (%s, %s, %d, %s)", name,
990 (t->X_add_symbol) ? S_GET_NAME (t->X_add_symbol) : "--",
991 (t->X_op_symbol) ? S_GET_NAME (t->X_op_symbol) : "--",
992 (int) t->X_add_number,
993 (t->X_md) ? namemd : "--");
994 pr_debug ("\n");
995 fflush (stderr);
996 }
997
998 /* Parse the arguments to an opcode. */
999
1000 static int
1001 tokenize_arguments (char *str,
1002 expressionS *tok,
1003 int ntok)
1004 {
1005 char *old_input_line_pointer;
1006 bfd_boolean saw_comma = FALSE;
1007 bfd_boolean saw_arg = FALSE;
1008 int brk_lvl = 0;
1009 int num_args = 0;
1010 int i;
1011 size_t len;
1012 const struct arc_reloc_op_tag *r;
1013 expressionS tmpE;
1014 char *reloc_name, c;
1015
1016 memset (tok, 0, sizeof (*tok) * ntok);
1017
1018 /* Save and restore input_line_pointer around this function. */
1019 old_input_line_pointer = input_line_pointer;
1020 input_line_pointer = str;
1021
1022 while (*input_line_pointer)
1023 {
1024 SKIP_WHITESPACE ();
1025 switch (*input_line_pointer)
1026 {
1027 case '\0':
1028 goto fini;
1029
1030 case ',':
1031 input_line_pointer++;
1032 if (saw_comma || !saw_arg)
1033 goto err;
1034 saw_comma = TRUE;
1035 break;
1036
1037 case '}':
1038 case ']':
1039 ++input_line_pointer;
1040 --brk_lvl;
1041 if (!saw_arg)
1042 goto err;
1043 tok->X_op = O_bracket;
1044 ++tok;
1045 ++num_args;
1046 break;
1047
1048 case '{':
1049 case '[':
1050 input_line_pointer++;
1051 if (brk_lvl)
1052 goto err;
1053 ++brk_lvl;
1054 tok->X_op = O_bracket;
1055 ++tok;
1056 ++num_args;
1057 break;
1058
1059 case '@':
1060 /* We have labels, function names and relocations, all
1061 starting with @ symbol. Sort them out. */
1062 if (saw_arg && !saw_comma)
1063 goto err;
1064
1065 /* Parse @label. */
1066 tok->X_op = O_symbol;
1067 tok->X_md = O_absent;
1068 expression (tok);
1069 if (*input_line_pointer != '@')
1070 goto normalsymbol; /* This is not a relocation. */
1071
1072 relocationsym:
1073
1074 /* A relocation opernad has the following form
1075 @identifier@relocation_type. The identifier is already
1076 in tok! */
1077 if (tok->X_op != O_symbol)
1078 {
1079 as_bad (_("No valid label relocation operand"));
1080 goto err;
1081 }
1082
1083 /* Parse @relocation_type. */
1084 input_line_pointer++;
1085 c = get_symbol_name (&reloc_name);
1086 len = input_line_pointer - reloc_name;
1087 if (len == 0)
1088 {
1089 as_bad (_("No relocation operand"));
1090 goto err;
1091 }
1092
1093 /* Go through known relocation and try to find a match. */
1094 r = &arc_reloc_op[0];
1095 for (i = arc_num_reloc_op - 1; i >= 0; i--, r++)
1096 if (len == r->length
1097 && memcmp (reloc_name, r->name, len) == 0)
1098 break;
1099 if (i < 0)
1100 {
1101 as_bad (_("Unknown relocation operand: @%s"), reloc_name);
1102 goto err;
1103 }
1104
1105 *input_line_pointer = c;
1106 SKIP_WHITESPACE_AFTER_NAME ();
1107 /* Extra check for TLS: base. */
1108 if (*input_line_pointer == '@')
1109 {
1110 symbolS *base;
1111 if (tok->X_op_symbol != NULL
1112 || tok->X_op != O_symbol)
1113 {
1114 as_bad (_("Unable to parse TLS base: %s"),
1115 input_line_pointer);
1116 goto err;
1117 }
1118 input_line_pointer++;
1119 char *sym_name;
1120 c = get_symbol_name (&sym_name);
1121 base = symbol_find_or_make (sym_name);
1122 tok->X_op = O_subtract;
1123 tok->X_op_symbol = base;
1124 restore_line_pointer (c);
1125 tmpE.X_add_number = 0;
1126 }
1127 else if ((*input_line_pointer != '+')
1128 && (*input_line_pointer != '-'))
1129 {
1130 tmpE.X_add_number = 0;
1131 }
1132 else
1133 {
1134 /* Parse the constant of a complex relocation expression
1135 like @identifier@reloc +/- const. */
1136 if (! r->complex_expr)
1137 {
1138 as_bad (_("@%s is not a complex relocation."), r->name);
1139 goto err;
1140 }
1141 expression (&tmpE);
1142 if (tmpE.X_op != O_constant)
1143 {
1144 as_bad (_("Bad expression: @%s + %s."),
1145 r->name, input_line_pointer);
1146 goto err;
1147 }
1148 }
1149
1150 tok->X_md = r->op;
1151 tok->X_add_number = tmpE.X_add_number;
1152
1153 debug_exp (tok);
1154
1155 saw_comma = FALSE;
1156 saw_arg = TRUE;
1157 tok++;
1158 num_args++;
1159 break;
1160
1161 case '%':
1162 /* Can be a register. */
1163 ++input_line_pointer;
1164 /* Fall through. */
1165 default:
1166
1167 if (saw_arg && !saw_comma)
1168 goto err;
1169
1170 tok->X_op = O_absent;
1171 tok->X_md = O_absent;
1172 expression (tok);
1173
1174 /* Legacy: There are cases when we have
1175 identifier@relocation_type, if it is the case parse the
1176 relocation type as well. */
1177 if (*input_line_pointer == '@')
1178 goto relocationsym;
1179
1180 normalsymbol:
1181 debug_exp (tok);
1182
1183 if (tok->X_op == O_illegal || tok->X_op == O_absent)
1184 goto err;
1185
1186 saw_comma = FALSE;
1187 saw_arg = TRUE;
1188 tok++;
1189 num_args++;
1190 break;
1191 }
1192 }
1193
1194 fini:
1195 if (saw_comma || brk_lvl)
1196 goto err;
1197 input_line_pointer = old_input_line_pointer;
1198
1199 return num_args;
1200
1201 err:
1202 if (brk_lvl)
1203 as_bad (_("Brackets in operand field incorrect"));
1204 else if (saw_comma)
1205 as_bad (_("extra comma"));
1206 else if (!saw_arg)
1207 as_bad (_("missing argument"));
1208 else
1209 as_bad (_("missing comma or colon"));
1210 input_line_pointer = old_input_line_pointer;
1211 return -1;
1212 }
1213
1214 /* Parse the flags to a structure. */
1215
1216 static int
1217 tokenize_flags (const char *str,
1218 struct arc_flags flags[],
1219 int nflg)
1220 {
1221 char *old_input_line_pointer;
1222 bfd_boolean saw_flg = FALSE;
1223 bfd_boolean saw_dot = FALSE;
1224 int num_flags = 0;
1225 size_t flgnamelen;
1226
1227 memset (flags, 0, sizeof (*flags) * nflg);
1228
1229 /* Save and restore input_line_pointer around this function. */
1230 old_input_line_pointer = input_line_pointer;
1231 input_line_pointer = (char *) str;
1232
1233 while (*input_line_pointer)
1234 {
1235 switch (*input_line_pointer)
1236 {
1237 case ' ':
1238 case '\0':
1239 goto fini;
1240
1241 case '.':
1242 input_line_pointer++;
1243 if (saw_dot)
1244 goto err;
1245 saw_dot = TRUE;
1246 saw_flg = FALSE;
1247 break;
1248
1249 default:
1250 if (saw_flg && !saw_dot)
1251 goto err;
1252
1253 if (num_flags >= nflg)
1254 goto err;
1255
1256 flgnamelen = strspn (input_line_pointer,
1257 "abcdefghijklmnopqrstuvwxyz0123456789");
1258 if (flgnamelen > MAX_FLAG_NAME_LENGTH)
1259 goto err;
1260
1261 memcpy (flags->name, input_line_pointer, flgnamelen);
1262
1263 input_line_pointer += flgnamelen;
1264 flags++;
1265 saw_dot = FALSE;
1266 saw_flg = TRUE;
1267 num_flags++;
1268 break;
1269 }
1270 }
1271
1272 fini:
1273 input_line_pointer = old_input_line_pointer;
1274 return num_flags;
1275
1276 err:
1277 if (saw_dot)
1278 as_bad (_("extra dot"));
1279 else if (!saw_flg)
1280 as_bad (_("unrecognized flag"));
1281 else
1282 as_bad (_("failed to parse flags"));
1283 input_line_pointer = old_input_line_pointer;
1284 return -1;
1285 }
1286
1287 /* Apply the fixups in order. */
1288
1289 static void
1290 apply_fixups (struct arc_insn *insn, fragS *fragP, int fix)
1291 {
1292 int i;
1293
1294 for (i = 0; i < insn->nfixups; i++)
1295 {
1296 struct arc_fixup *fixup = &insn->fixups[i];
1297 int size, pcrel, offset = 0;
1298
1299 /* FIXME! the reloc size is wrong in the BFD file.
1300 When it is fixed please delete me. */
1301 size = (insn->short_insn && !fixup->islong) ? 2 : 4;
1302
1303 if (fixup->islong)
1304 offset = (insn->short_insn) ? 2 : 4;
1305
1306 /* Some fixups are only used internally, thus no howto. */
1307 if ((int) fixup->reloc == 0)
1308 as_fatal (_("Unhandled reloc type"));
1309
1310 if ((int) fixup->reloc < 0)
1311 {
1312 /* FIXME! the reloc size is wrong in the BFD file.
1313 When it is fixed please enable me.
1314 size = (insn->short_insn && !fixup->islong) ? 2 : 4; */
1315 pcrel = fixup->pcrel;
1316 }
1317 else
1318 {
1319 reloc_howto_type *reloc_howto =
1320 bfd_reloc_type_lookup (stdoutput,
1321 (bfd_reloc_code_real_type) fixup->reloc);
1322 gas_assert (reloc_howto);
1323
1324 /* FIXME! the reloc size is wrong in the BFD file.
1325 When it is fixed please enable me.
1326 size = bfd_get_reloc_size (reloc_howto); */
1327 pcrel = reloc_howto->pc_relative;
1328 }
1329
1330 pr_debug ("%s:%d: apply_fixups: new %s fixup (PCrel:%s) of size %d @ \
1331 offset %d + %d\n",
1332 fragP->fr_file, fragP->fr_line,
1333 (fixup->reloc < 0) ? "Internal" :
1334 bfd_get_reloc_code_name (fixup->reloc),
1335 pcrel ? "Y" : "N",
1336 size, fix, offset);
1337 fix_new_exp (fragP, fix + offset,
1338 size, &fixup->exp, pcrel, fixup->reloc);
1339
1340 /* Check for ZOLs, and update symbol info if any. */
1341 if (LP_INSN (insn->insn))
1342 {
1343 gas_assert (fixup->exp.X_add_symbol);
1344 ARC_SET_FLAG (fixup->exp.X_add_symbol, ARC_FLAG_ZOL);
1345 }
1346 }
1347 }
1348
1349 /* Actually output an instruction with its fixup. */
1350
1351 static void
1352 emit_insn0 (struct arc_insn *insn, char *where, bfd_boolean relax)
1353 {
1354 char *f = where;
1355
1356 pr_debug ("Emit insn : 0x%x\n", insn->insn);
1357 pr_debug ("\tShort : 0x%d\n", insn->short_insn);
1358 pr_debug ("\tLong imm: 0x%lx\n", insn->limm);
1359
1360 /* Write out the instruction. */
1361 if (insn->short_insn)
1362 {
1363 if (insn->has_limm)
1364 {
1365 if (!relax)
1366 f = frag_more (6);
1367 md_number_to_chars (f, insn->insn, 2);
1368 md_number_to_chars_midend (f + 2, insn->limm, 4);
1369 dwarf2_emit_insn (6);
1370 }
1371 else
1372 {
1373 if (!relax)
1374 f = frag_more (2);
1375 md_number_to_chars (f, insn->insn, 2);
1376 dwarf2_emit_insn (2);
1377 }
1378 }
1379 else
1380 {
1381 if (insn->has_limm)
1382 {
1383 if (!relax)
1384 f = frag_more (8);
1385 md_number_to_chars_midend (f, insn->insn, 4);
1386 md_number_to_chars_midend (f + 4, insn->limm, 4);
1387 dwarf2_emit_insn (8);
1388 }
1389 else
1390 {
1391 if (!relax)
1392 f = frag_more (4);
1393 md_number_to_chars_midend (f, insn->insn, 4);
1394 dwarf2_emit_insn (4);
1395 }
1396 }
1397
1398 if (!relax)
1399 apply_fixups (insn, frag_now, (f - frag_now->fr_literal));
1400 }
1401
1402 static void
1403 emit_insn1 (struct arc_insn *insn)
1404 {
1405 /* How frag_var's args are currently configured:
1406 - rs_machine_dependent, to dictate it's a relaxation frag.
1407 - FRAG_MAX_GROWTH, maximum size of instruction
1408 - 0, variable size that might grow...unused by generic relaxation.
1409 - frag_now->fr_subtype, fr_subtype starting value, set previously.
1410 - s, opand expression.
1411 - 0, offset but it's unused.
1412 - 0, opcode but it's unused. */
1413 symbolS *s = make_expr_symbol (&insn->fixups[0].exp);
1414 frag_now->tc_frag_data.pcrel = insn->fixups[0].pcrel;
1415
1416 if (frag_room () < FRAG_MAX_GROWTH)
1417 {
1418 /* Handle differently when frag literal memory is exhausted.
1419 This is used because when there's not enough memory left in
1420 the current frag, a new frag is created and the information
1421 we put into frag_now->tc_frag_data is disregarded. */
1422
1423 struct arc_relax_type relax_info_copy;
1424 relax_substateT subtype = frag_now->fr_subtype;
1425
1426 memcpy (&relax_info_copy, &frag_now->tc_frag_data,
1427 sizeof (struct arc_relax_type));
1428
1429 frag_wane (frag_now);
1430 frag_grow (FRAG_MAX_GROWTH);
1431
1432 memcpy (&frag_now->tc_frag_data, &relax_info_copy,
1433 sizeof (struct arc_relax_type));
1434
1435 frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
1436 subtype, s, 0, 0);
1437 }
1438 else
1439 frag_var (rs_machine_dependent, FRAG_MAX_GROWTH, 0,
1440 frag_now->fr_subtype, s, 0, 0);
1441 }
1442
1443 static void
1444 emit_insn (struct arc_insn *insn)
1445 {
1446 if (insn->relax)
1447 emit_insn1 (insn);
1448 else
1449 emit_insn0 (insn, NULL, FALSE);
1450 }
1451
1452 /* Check whether a symbol involves a register. */
1453
1454 static bfd_boolean
1455 contains_register (symbolS *sym)
1456 {
1457 if (sym)
1458 {
1459 expressionS *ex = symbol_get_value_expression (sym);
1460
1461 return ((O_register == ex->X_op)
1462 && !contains_register (ex->X_add_symbol)
1463 && !contains_register (ex->X_op_symbol));
1464 }
1465
1466 return FALSE;
1467 }
1468
1469 /* Returns the register number within a symbol. */
1470
1471 static int
1472 get_register (symbolS *sym)
1473 {
1474 if (!contains_register (sym))
1475 return -1;
1476
1477 expressionS *ex = symbol_get_value_expression (sym);
1478 return regno (ex->X_add_number);
1479 }
1480
1481 /* Return true if a RELOC is generic. A generic reloc is PC-rel of a
1482 simple ME relocation (e.g. RELOC_ARC_32_ME, BFD_RELOC_ARC_PC32. */
1483
1484 static bfd_boolean
1485 generic_reloc_p (extended_bfd_reloc_code_real_type reloc)
1486 {
1487 if (!reloc)
1488 return FALSE;
1489
1490 switch (reloc)
1491 {
1492 case BFD_RELOC_ARC_SDA_LDST:
1493 case BFD_RELOC_ARC_SDA_LDST1:
1494 case BFD_RELOC_ARC_SDA_LDST2:
1495 case BFD_RELOC_ARC_SDA16_LD:
1496 case BFD_RELOC_ARC_SDA16_LD1:
1497 case BFD_RELOC_ARC_SDA16_LD2:
1498 case BFD_RELOC_ARC_SDA16_ST2:
1499 case BFD_RELOC_ARC_SDA32_ME:
1500 return FALSE;
1501 default:
1502 return TRUE;
1503 }
1504 }
1505
1506 /* Allocates a tok entry. */
1507
1508 static int
1509 allocate_tok (expressionS *tok, int ntok, int cidx)
1510 {
1511 if (ntok > MAX_INSN_ARGS - 2)
1512 return 0; /* No space left. */
1513
1514 if (cidx > ntok)
1515 return 0; /* Incorect args. */
1516
1517 memcpy (&tok[ntok+1], &tok[ntok], sizeof (*tok));
1518
1519 if (cidx == ntok)
1520 return 1; /* Success. */
1521 return allocate_tok (tok, ntok - 1, cidx);
1522 }
1523
1524 /* Check if an particular ARC feature is enabled. */
1525
1526 static bfd_boolean
1527 check_cpu_feature (insn_subclass_t sc)
1528 {
1529 if (!(arc_features & ARC_CD)
1530 && is_code_density_p (sc))
1531 return FALSE;
1532
1533 if (!(arc_features & ARC_SPFP)
1534 && is_spfp_p (sc))
1535 return FALSE;
1536
1537 if (!(arc_features & ARC_DPFP)
1538 && is_dpfp_p (sc))
1539 return FALSE;
1540
1541 if (!(arc_features & ARC_FPUDA)
1542 && is_fpuda_p (sc))
1543 return FALSE;
1544
1545 return TRUE;
1546 }
1547
1548 /* Search forward through all variants of an opcode looking for a
1549 syntax match. */
1550
1551 static const struct arc_opcode *
1552 find_opcode_match (const struct arc_opcode_hash_entry *entry,
1553 expressionS *tok,
1554 int *pntok,
1555 struct arc_flags *first_pflag,
1556 int nflgs,
1557 int *pcpumatch)
1558 {
1559 const struct arc_opcode *opcode;
1560 struct arc_opcode_hash_entry_iterator iter;
1561 int ntok = *pntok;
1562 int got_cpu_match = 0;
1563 expressionS bktok[MAX_INSN_ARGS];
1564 int bkntok;
1565 expressionS emptyE;
1566
1567 arc_opcode_hash_entry_iterator_init (&iter);
1568 memset (&emptyE, 0, sizeof (emptyE));
1569 memcpy (bktok, tok, MAX_INSN_ARGS * sizeof (*tok));
1570 bkntok = ntok;
1571
1572 for (opcode = arc_opcode_hash_entry_iterator_next (entry, &iter);
1573 opcode != NULL;
1574 opcode = arc_opcode_hash_entry_iterator_next (entry, &iter))
1575 {
1576 const unsigned char *opidx;
1577 const unsigned char *flgidx;
1578 int tokidx = 0, lnflg, i;
1579 const expressionS *t = &emptyE;
1580
1581 pr_debug ("%s:%d: find_opcode_match: trying opcode 0x%08X ",
1582 frag_now->fr_file, frag_now->fr_line, opcode->opcode);
1583
1584 /* Don't match opcodes that don't exist on this
1585 architecture. */
1586 if (!(opcode->cpu & arc_target))
1587 goto match_failed;
1588
1589 if (!check_cpu_feature (opcode->subclass))
1590 goto match_failed;
1591
1592 got_cpu_match = 1;
1593 pr_debug ("cpu ");
1594
1595 /* Check the operands. */
1596 for (opidx = opcode->operands; *opidx; ++opidx)
1597 {
1598 const struct arc_operand *operand = &arc_operands[*opidx];
1599
1600 /* Only take input from real operands. */
1601 if ((operand->flags & ARC_OPERAND_FAKE)
1602 && !(operand->flags & ARC_OPERAND_BRAKET))
1603 continue;
1604
1605 /* When we expect input, make sure we have it. */
1606 if (tokidx >= ntok)
1607 goto match_failed;
1608
1609 /* Match operand type with expression type. */
1610 switch (operand->flags & ARC_OPERAND_TYPECHECK_MASK)
1611 {
1612 case ARC_OPERAND_IR:
1613 /* Check to be a register. */
1614 if ((tok[tokidx].X_op != O_register
1615 || !is_ir_num (tok[tokidx].X_add_number))
1616 && !(operand->flags & ARC_OPERAND_IGNORE))
1617 goto match_failed;
1618
1619 /* If expect duplicate, make sure it is duplicate. */
1620 if (operand->flags & ARC_OPERAND_DUPLICATE)
1621 {
1622 /* Check for duplicate. */
1623 if (t->X_op != O_register
1624 || !is_ir_num (t->X_add_number)
1625 || (regno (t->X_add_number) !=
1626 regno (tok[tokidx].X_add_number)))
1627 goto match_failed;
1628 }
1629
1630 /* Special handling? */
1631 if (operand->insert)
1632 {
1633 const char *errmsg = NULL;
1634 (*operand->insert)(0,
1635 regno (tok[tokidx].X_add_number),
1636 &errmsg);
1637 if (errmsg)
1638 {
1639 if (operand->flags & ARC_OPERAND_IGNORE)
1640 {
1641 /* Missing argument, create one. */
1642 if (!allocate_tok (tok, ntok - 1, tokidx))
1643 goto match_failed;
1644
1645 tok[tokidx].X_op = O_absent;
1646 ++ntok;
1647 }
1648 else
1649 goto match_failed;
1650 }
1651 }
1652
1653 t = &tok[tokidx];
1654 break;
1655
1656 case ARC_OPERAND_BRAKET:
1657 /* Check if bracket is also in opcode table as
1658 operand. */
1659 if (tok[tokidx].X_op != O_bracket)
1660 goto match_failed;
1661 break;
1662
1663 case ARC_OPERAND_LIMM:
1664 case ARC_OPERAND_SIGNED:
1665 case ARC_OPERAND_UNSIGNED:
1666 switch (tok[tokidx].X_op)
1667 {
1668 case O_illegal:
1669 case O_absent:
1670 case O_register:
1671 goto match_failed;
1672
1673 case O_bracket:
1674 /* Got an (too) early bracket, check if it is an
1675 ignored operand. N.B. This procedure works only
1676 when bracket is the last operand! */
1677 if (!(operand->flags & ARC_OPERAND_IGNORE))
1678 goto match_failed;
1679 /* Insert the missing operand. */
1680 if (!allocate_tok (tok, ntok - 1, tokidx))
1681 goto match_failed;
1682
1683 tok[tokidx].X_op = O_absent;
1684 ++ntok;
1685 break;
1686
1687 case O_symbol:
1688 {
1689 const char *p;
1690 const struct arc_aux_reg *auxr;
1691
1692 if (opcode->class != AUXREG)
1693 goto de_fault;
1694 p = S_GET_NAME (tok[tokidx].X_add_symbol);
1695
1696 auxr = hash_find (arc_aux_hash, p);
1697 if (auxr)
1698 {
1699 /* We modify the token array here, safe in the
1700 knowledge, that if this was the wrong
1701 choice then the original contents will be
1702 restored from BKTOK. */
1703 tok[tokidx].X_op = O_constant;
1704 tok[tokidx].X_add_number = auxr->address;
1705 ARC_SET_FLAG (tok[tokidx].X_add_symbol, ARC_FLAG_AUX);
1706 }
1707
1708 if (tok[tokidx].X_op != O_constant)
1709 goto de_fault;
1710 }
1711 /* Fall-through */
1712 case O_constant:
1713 /* Check the range. */
1714 if (operand->bits != 32
1715 && !(operand->flags & ARC_OPERAND_NCHK))
1716 {
1717 offsetT min, max, val;
1718 val = tok[tokidx].X_add_number;
1719
1720 if (operand->flags & ARC_OPERAND_SIGNED)
1721 {
1722 max = (1 << (operand->bits - 1)) - 1;
1723 min = -(1 << (operand->bits - 1));
1724 }
1725 else
1726 {
1727 max = (1 << operand->bits) - 1;
1728 min = 0;
1729 }
1730
1731 if (val < min || val > max)
1732 goto match_failed;
1733
1734 /* Check alignmets. */
1735 if ((operand->flags & ARC_OPERAND_ALIGNED32)
1736 && (val & 0x03))
1737 goto match_failed;
1738
1739 if ((operand->flags & ARC_OPERAND_ALIGNED16)
1740 && (val & 0x01))
1741 goto match_failed;
1742 }
1743 else if (operand->flags & ARC_OPERAND_NCHK)
1744 {
1745 if (operand->insert)
1746 {
1747 const char *errmsg = NULL;
1748 (*operand->insert)(0,
1749 tok[tokidx].X_add_number,
1750 &errmsg);
1751 if (errmsg)
1752 goto match_failed;
1753 }
1754 else
1755 goto match_failed;
1756 }
1757 break;
1758
1759 case O_subtract:
1760 /* Check if it is register range. */
1761 if ((tok[tokidx].X_add_number == 0)
1762 && contains_register (tok[tokidx].X_add_symbol)
1763 && contains_register (tok[tokidx].X_op_symbol))
1764 {
1765 int regs;
1766
1767 regs = get_register (tok[tokidx].X_add_symbol);
1768 regs <<= 16;
1769 regs |= get_register (tok[tokidx].X_op_symbol);
1770 if (operand->insert)
1771 {
1772 const char *errmsg = NULL;
1773 (*operand->insert)(0,
1774 regs,
1775 &errmsg);
1776 if (errmsg)
1777 goto match_failed;
1778 }
1779 else
1780 goto match_failed;
1781 break;
1782 }
1783 default:
1784 de_fault:
1785 if (operand->default_reloc == 0)
1786 goto match_failed; /* The operand needs relocation. */
1787
1788 /* Relocs requiring long immediate. FIXME! make it
1789 generic and move it to a function. */
1790 switch (tok[tokidx].X_md)
1791 {
1792 case O_gotoff:
1793 case O_gotpc:
1794 case O_pcl:
1795 case O_tpoff:
1796 case O_dtpoff:
1797 case O_tlsgd:
1798 case O_tlsie:
1799 if (!(operand->flags & ARC_OPERAND_LIMM))
1800 goto match_failed;
1801 case O_absent:
1802 if (!generic_reloc_p (operand->default_reloc))
1803 goto match_failed;
1804 default:
1805 break;
1806 }
1807 break;
1808 }
1809 /* If expect duplicate, make sure it is duplicate. */
1810 if (operand->flags & ARC_OPERAND_DUPLICATE)
1811 {
1812 if (t->X_op == O_illegal
1813 || t->X_op == O_absent
1814 || t->X_op == O_register
1815 || (t->X_add_number != tok[tokidx].X_add_number))
1816 goto match_failed;
1817 }
1818 t = &tok[tokidx];
1819 break;
1820
1821 default:
1822 /* Everything else should have been fake. */
1823 abort ();
1824 }
1825
1826 ++tokidx;
1827 }
1828 pr_debug ("opr ");
1829
1830 /* Setup ready for flag parsing. */
1831 lnflg = nflgs;
1832 for (i = 0; i < nflgs; i++)
1833 first_pflag[i].flgp = NULL;
1834
1835 /* Check the flags. Iterate over the valid flag classes. */
1836 for (flgidx = opcode->flags; *flgidx; ++flgidx)
1837 {
1838 /* Get a valid flag class. */
1839 const struct arc_flag_class *cl_flags = &arc_flag_classes[*flgidx];
1840 const unsigned *flgopridx;
1841 int cl_matches = 0;
1842 struct arc_flags *pflag = NULL;
1843
1844 /* Check for extension conditional codes. */
1845 if (ext_condcode.arc_ext_condcode
1846 && cl_flags->class & F_CLASS_EXTEND)
1847 {
1848 struct arc_flag_operand *pf = ext_condcode.arc_ext_condcode;
1849 while (pf->name)
1850 {
1851 pflag = first_pflag;
1852 for (i = 0; i < nflgs; i++, pflag++)
1853 {
1854 if (!strcmp (pf->name, pflag->name))
1855 {
1856 if (pflag->flgp != NULL)
1857 goto match_failed;
1858 /* Found it. */
1859 cl_matches++;
1860 pflag->flgp = pf;
1861 lnflg--;
1862 break;
1863 }
1864 }
1865 pf++;
1866 }
1867 }
1868
1869 for (flgopridx = cl_flags->flags; *flgopridx; ++flgopridx)
1870 {
1871 const struct arc_flag_operand *flg_operand;
1872
1873 pflag = first_pflag;
1874 flg_operand = &arc_flag_operands[*flgopridx];
1875 for (i = 0; i < nflgs; i++, pflag++)
1876 {
1877 /* Match against the parsed flags. */
1878 if (!strcmp (flg_operand->name, pflag->name))
1879 {
1880 if (pflag->flgp != NULL)
1881 goto match_failed;
1882 cl_matches++;
1883 pflag->flgp = (struct arc_flag_operand *) flg_operand;
1884 lnflg--;
1885 break; /* goto next flag class and parsed flag. */
1886 }
1887 }
1888 }
1889
1890 if ((cl_flags->class & F_CLASS_REQUIRED) && cl_matches == 0)
1891 goto match_failed;
1892 if ((cl_flags->class & F_CLASS_OPTIONAL) && cl_matches > 1)
1893 goto match_failed;
1894 }
1895 /* Did I check all the parsed flags? */
1896 if (lnflg)
1897 goto match_failed;
1898
1899 pr_debug ("flg");
1900 /* Possible match -- did we use all of our input? */
1901 if (tokidx == ntok)
1902 {
1903 *pntok = ntok;
1904 pr_debug ("\n");
1905 return opcode;
1906 }
1907
1908 match_failed:;
1909 pr_debug ("\n");
1910 /* Restore the original parameters. */
1911 memcpy (tok, bktok, MAX_INSN_ARGS * sizeof (*tok));
1912 ntok = bkntok;
1913 }
1914
1915 if (*pcpumatch)
1916 *pcpumatch = got_cpu_match;
1917
1918 return NULL;
1919 }
1920
1921 /* Swap operand tokens. */
1922
1923 static void
1924 swap_operand (expressionS *operand_array,
1925 unsigned source,
1926 unsigned destination)
1927 {
1928 expressionS cpy_operand;
1929 expressionS *src_operand;
1930 expressionS *dst_operand;
1931 size_t size;
1932
1933 if (source == destination)
1934 return;
1935
1936 src_operand = &operand_array[source];
1937 dst_operand = &operand_array[destination];
1938 size = sizeof (expressionS);
1939
1940 /* Make copy of operand to swap with and swap. */
1941 memcpy (&cpy_operand, dst_operand, size);
1942 memcpy (dst_operand, src_operand, size);
1943 memcpy (src_operand, &cpy_operand, size);
1944 }
1945
1946 /* Check if *op matches *tok type.
1947 Returns FALSE if they don't match, TRUE if they match. */
1948
1949 static bfd_boolean
1950 pseudo_operand_match (const expressionS *tok,
1951 const struct arc_operand_operation *op)
1952 {
1953 offsetT min, max, val;
1954 bfd_boolean ret;
1955 const struct arc_operand *operand_real = &arc_operands[op->operand_idx];
1956
1957 ret = FALSE;
1958 switch (tok->X_op)
1959 {
1960 case O_constant:
1961 if (operand_real->bits == 32 && (operand_real->flags & ARC_OPERAND_LIMM))
1962 ret = 1;
1963 else if (!(operand_real->flags & ARC_OPERAND_IR))
1964 {
1965 val = tok->X_add_number + op->count;
1966 if (operand_real->flags & ARC_OPERAND_SIGNED)
1967 {
1968 max = (1 << (operand_real->bits - 1)) - 1;
1969 min = -(1 << (operand_real->bits - 1));
1970 }
1971 else
1972 {
1973 max = (1 << operand_real->bits) - 1;
1974 min = 0;
1975 }
1976 if (min <= val && val <= max)
1977 ret = TRUE;
1978 }
1979 break;
1980
1981 case O_symbol:
1982 /* Handle all symbols as long immediates or signed 9. */
1983 if (operand_real->flags & ARC_OPERAND_LIMM ||
1984 ((operand_real->flags & ARC_OPERAND_SIGNED) && operand_real->bits == 9))
1985 ret = TRUE;
1986 break;
1987
1988 case O_register:
1989 if (operand_real->flags & ARC_OPERAND_IR)
1990 ret = TRUE;
1991 break;
1992
1993 case O_bracket:
1994 if (operand_real->flags & ARC_OPERAND_BRAKET)
1995 ret = TRUE;
1996 break;
1997
1998 default:
1999 /* Unknown. */
2000 break;
2001 }
2002 return ret;
2003 }
2004
2005 /* Find pseudo instruction in array. */
2006
2007 static const struct arc_pseudo_insn *
2008 find_pseudo_insn (const char *opname,
2009 int ntok,
2010 const expressionS *tok)
2011 {
2012 const struct arc_pseudo_insn *pseudo_insn = NULL;
2013 const struct arc_operand_operation *op;
2014 unsigned int i;
2015 int j;
2016
2017 for (i = 0; i < arc_num_pseudo_insn; ++i)
2018 {
2019 pseudo_insn = &arc_pseudo_insns[i];
2020 if (strcmp (pseudo_insn->mnemonic_p, opname) == 0)
2021 {
2022 op = pseudo_insn->operand;
2023 for (j = 0; j < ntok; ++j)
2024 if (!pseudo_operand_match (&tok[j], &op[j]))
2025 break;
2026
2027 /* Found the right instruction. */
2028 if (j == ntok)
2029 return pseudo_insn;
2030 }
2031 }
2032 return NULL;
2033 }
2034
2035 /* Assumes the expressionS *tok is of sufficient size. */
2036
2037 static const struct arc_opcode_hash_entry *
2038 find_special_case_pseudo (const char *opname,
2039 int *ntok,
2040 expressionS *tok,
2041 int *nflgs,
2042 struct arc_flags *pflags)
2043 {
2044 const struct arc_pseudo_insn *pseudo_insn = NULL;
2045 const struct arc_operand_operation *operand_pseudo;
2046 const struct arc_operand *operand_real;
2047 unsigned i;
2048 char construct_operand[MAX_CONSTR_STR];
2049
2050 /* Find whether opname is in pseudo instruction array. */
2051 pseudo_insn = find_pseudo_insn (opname, *ntok, tok);
2052
2053 if (pseudo_insn == NULL)
2054 return NULL;
2055
2056 /* Handle flag, Limited to one flag at the moment. */
2057 if (pseudo_insn->flag_r != NULL)
2058 *nflgs += tokenize_flags (pseudo_insn->flag_r, &pflags[*nflgs],
2059 MAX_INSN_FLGS - *nflgs);
2060
2061 /* Handle operand operations. */
2062 for (i = 0; i < pseudo_insn->operand_cnt; ++i)
2063 {
2064 operand_pseudo = &pseudo_insn->operand[i];
2065 operand_real = &arc_operands[operand_pseudo->operand_idx];
2066
2067 if (operand_real->flags & ARC_OPERAND_BRAKET &&
2068 !operand_pseudo->needs_insert)
2069 continue;
2070
2071 /* Has to be inserted (i.e. this token does not exist yet). */
2072 if (operand_pseudo->needs_insert)
2073 {
2074 if (operand_real->flags & ARC_OPERAND_BRAKET)
2075 {
2076 tok[i].X_op = O_bracket;
2077 ++(*ntok);
2078 continue;
2079 }
2080
2081 /* Check if operand is a register or constant and handle it
2082 by type. */
2083 if (operand_real->flags & ARC_OPERAND_IR)
2084 snprintf (construct_operand, MAX_CONSTR_STR, "r%d",
2085 operand_pseudo->count);
2086 else
2087 snprintf (construct_operand, MAX_CONSTR_STR, "%d",
2088 operand_pseudo->count);
2089
2090 tokenize_arguments (construct_operand, &tok[i], 1);
2091 ++(*ntok);
2092 }
2093
2094 else if (operand_pseudo->count)
2095 {
2096 /* Operand number has to be adjusted accordingly (by operand
2097 type). */
2098 switch (tok[i].X_op)
2099 {
2100 case O_constant:
2101 tok[i].X_add_number += operand_pseudo->count;
2102 break;
2103
2104 case O_symbol:
2105 break;
2106
2107 default:
2108 /* Ignored. */
2109 break;
2110 }
2111 }
2112 }
2113
2114 /* Swap operands if necessary. Only supports one swap at the
2115 moment. */
2116 for (i = 0; i < pseudo_insn->operand_cnt; ++i)
2117 {
2118 operand_pseudo = &pseudo_insn->operand[i];
2119
2120 if (operand_pseudo->swap_operand_idx == i)
2121 continue;
2122
2123 swap_operand (tok, i, operand_pseudo->swap_operand_idx);
2124
2125 /* Prevent a swap back later by breaking out. */
2126 break;
2127 }
2128
2129 return arc_find_opcode (pseudo_insn->mnemonic_r);
2130 }
2131
2132 static const struct arc_opcode_hash_entry *
2133 find_special_case_flag (const char *opname,
2134 int *nflgs,
2135 struct arc_flags *pflags)
2136 {
2137 unsigned int i;
2138 const char *flagnm;
2139 unsigned flag_idx, flag_arr_idx;
2140 size_t flaglen, oplen;
2141 const struct arc_flag_special *arc_flag_special_opcode;
2142 const struct arc_opcode_hash_entry *entry;
2143
2144 /* Search for special case instruction. */
2145 for (i = 0; i < arc_num_flag_special; i++)
2146 {
2147 arc_flag_special_opcode = &arc_flag_special_cases[i];
2148 oplen = strlen (arc_flag_special_opcode->name);
2149
2150 if (strncmp (opname, arc_flag_special_opcode->name, oplen) != 0)
2151 continue;
2152
2153 /* Found a potential special case instruction, now test for
2154 flags. */
2155 for (flag_arr_idx = 0;; ++flag_arr_idx)
2156 {
2157 flag_idx = arc_flag_special_opcode->flags[flag_arr_idx];
2158 if (flag_idx == 0)
2159 break; /* End of array, nothing found. */
2160
2161 flagnm = arc_flag_operands[flag_idx].name;
2162 flaglen = strlen (flagnm);
2163 if (strcmp (opname + oplen, flagnm) == 0)
2164 {
2165 entry = arc_find_opcode (arc_flag_special_opcode->name);
2166
2167 if (*nflgs + 1 > MAX_INSN_FLGS)
2168 break;
2169 memcpy (pflags[*nflgs].name, flagnm, flaglen);
2170 pflags[*nflgs].name[flaglen] = '\0';
2171 (*nflgs)++;
2172 return entry;
2173 }
2174 }
2175 }
2176 return NULL;
2177 }
2178
2179 /* Used to find special case opcode. */
2180
2181 static const struct arc_opcode_hash_entry *
2182 find_special_case (const char *opname,
2183 int *nflgs,
2184 struct arc_flags *pflags,
2185 expressionS *tok,
2186 int *ntok)
2187 {
2188 const struct arc_opcode_hash_entry *entry;
2189
2190 entry = find_special_case_pseudo (opname, ntok, tok, nflgs, pflags);
2191
2192 if (entry == NULL)
2193 entry = find_special_case_flag (opname, nflgs, pflags);
2194
2195 return entry;
2196 }
2197
2198 /* Given an opcode name, pre-tockenized set of argumenst and the
2199 opcode flags, take it all the way through emission. */
2200
2201 static void
2202 assemble_tokens (const char *opname,
2203 expressionS *tok,
2204 int ntok,
2205 struct arc_flags *pflags,
2206 int nflgs)
2207 {
2208 bfd_boolean found_something = FALSE;
2209 const struct arc_opcode_hash_entry *entry;
2210 int cpumatch = 1;
2211
2212 /* Search opcodes. */
2213 entry = arc_find_opcode (opname);
2214
2215 /* Couldn't find opcode conventional way, try special cases. */
2216 if (entry == NULL)
2217 entry = find_special_case (opname, &nflgs, pflags, tok, &ntok);
2218
2219 if (entry != NULL)
2220 {
2221 const struct arc_opcode *opcode;
2222
2223 pr_debug ("%s:%d: assemble_tokens: %s\n",
2224 frag_now->fr_file, frag_now->fr_line, opname);
2225 found_something = TRUE;
2226 opcode = find_opcode_match (entry, tok, &ntok, pflags,
2227 nflgs, &cpumatch);
2228 if (opcode != NULL)
2229 {
2230 struct arc_insn insn;
2231
2232 assemble_insn (opcode, tok, ntok, pflags, nflgs, &insn);
2233 emit_insn (&insn);
2234 return;
2235 }
2236 }
2237
2238 if (found_something)
2239 {
2240 if (cpumatch)
2241 as_bad (_("inappropriate arguments for opcode '%s'"), opname);
2242 else
2243 as_bad (_("opcode '%s' not supported for target %s"), opname,
2244 arc_target_name);
2245 }
2246 else
2247 as_bad (_("unknown opcode '%s'"), opname);
2248 }
2249
2250 /* The public interface to the instruction assembler. */
2251
2252 void
2253 md_assemble (char *str)
2254 {
2255 char *opname;
2256 expressionS tok[MAX_INSN_ARGS];
2257 int ntok, nflg;
2258 size_t opnamelen;
2259 struct arc_flags flags[MAX_INSN_FLGS];
2260
2261 /* Split off the opcode. */
2262 opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_0123468");
2263 opname = xmalloc (opnamelen + 1);
2264 memcpy (opname, str, opnamelen);
2265 opname[opnamelen] = '\0';
2266
2267 /* Signalize we are assmbling the instructions. */
2268 assembling_insn = TRUE;
2269
2270 /* Tokenize the flags. */
2271 if ((nflg = tokenize_flags (str + opnamelen, flags, MAX_INSN_FLGS)) == -1)
2272 {
2273 as_bad (_("syntax error"));
2274 return;
2275 }
2276
2277 /* Scan up to the end of the mnemonic which must end in space or end
2278 of string. */
2279 str += opnamelen;
2280 for (; *str != '\0'; str++)
2281 if (*str == ' ')
2282 break;
2283
2284 /* Tokenize the rest of the line. */
2285 if ((ntok = tokenize_arguments (str, tok, MAX_INSN_ARGS)) < 0)
2286 {
2287 as_bad (_("syntax error"));
2288 return;
2289 }
2290
2291 /* Finish it off. */
2292 assemble_tokens (opname, tok, ntok, flags, nflg);
2293 assembling_insn = FALSE;
2294 }
2295
2296 /* Callback to insert a register into the hash table. */
2297
2298 static void
2299 declare_register (const char *name, int number)
2300 {
2301 const char *err;
2302 symbolS *regS = symbol_create (name, reg_section,
2303 number, &zero_address_frag);
2304
2305 err = hash_insert (arc_reg_hash, S_GET_NAME (regS), (void *) regS);
2306 if (err)
2307 as_fatal (_("Inserting \"%s\" into register table failed: %s"),
2308 name, err);
2309 }
2310
2311 /* Construct symbols for each of the general registers. */
2312
2313 static void
2314 declare_register_set (void)
2315 {
2316 int i;
2317 for (i = 0; i < 64; ++i)
2318 {
2319 char name[7];
2320
2321 sprintf (name, "r%d", i);
2322 declare_register (name, i);
2323 if ((i & 0x01) == 0)
2324 {
2325 sprintf (name, "r%dr%d", i, i+1);
2326 declare_register (name, i);
2327 }
2328 }
2329 }
2330
2331 /* Port-specific assembler initialization. This function is called
2332 once, at assembler startup time. */
2333
2334 void
2335 md_begin (void)
2336 {
2337 const struct arc_opcode *opcode = arc_opcodes;
2338
2339 if (!mach_type_specified_p)
2340 arc_select_cpu ("arc700");
2341
2342 /* The endianness can be chosen "at the factory". */
2343 target_big_endian = byte_order == BIG_ENDIAN;
2344
2345 if (!bfd_set_arch_mach (stdoutput, bfd_arch_arc, arc_mach_type))
2346 as_warn (_("could not set architecture and machine"));
2347
2348 /* Set elf header flags. */
2349 bfd_set_private_flags (stdoutput, arc_eflag);
2350
2351 /* Set up a hash table for the instructions. */
2352 arc_opcode_hash = hash_new ();
2353 if (arc_opcode_hash == NULL)
2354 as_fatal (_("Virtual memory exhausted"));
2355
2356 /* Initialize the hash table with the insns. */
2357 do
2358 {
2359 const char *name = opcode->name;
2360
2361 arc_insert_opcode (opcode);
2362
2363 while (++opcode && opcode->name
2364 && (opcode->name == name
2365 || !strcmp (opcode->name, name)))
2366 continue;
2367 }while (opcode->name);
2368
2369 /* Register declaration. */
2370 arc_reg_hash = hash_new ();
2371 if (arc_reg_hash == NULL)
2372 as_fatal (_("Virtual memory exhausted"));
2373
2374 declare_register_set ();
2375 declare_register ("gp", 26);
2376 declare_register ("fp", 27);
2377 declare_register ("sp", 28);
2378 declare_register ("ilink", 29);
2379 declare_register ("ilink1", 29);
2380 declare_register ("ilink2", 30);
2381 declare_register ("blink", 31);
2382
2383 declare_register ("mlo", 57);
2384 declare_register ("mmid", 58);
2385 declare_register ("mhi", 59);
2386
2387 declare_register ("acc1", 56);
2388 declare_register ("acc2", 57);
2389
2390 declare_register ("lp_count", 60);
2391 declare_register ("pcl", 63);
2392
2393 /* Initialize the last instructions. */
2394 memset (&arc_last_insns[0], 0, sizeof (arc_last_insns));
2395
2396 /* Aux register declaration. */
2397 arc_aux_hash = hash_new ();
2398 if (arc_aux_hash == NULL)
2399 as_fatal (_("Virtual memory exhausted"));
2400
2401 const struct arc_aux_reg *auxr = &arc_aux_regs[0];
2402 unsigned int i;
2403 for (i = 0; i < arc_num_aux_regs; i++, auxr++)
2404 {
2405 const char *retval;
2406
2407 if (!(auxr->cpu & arc_target))
2408 continue;
2409
2410 if ((auxr->subclass != NONE)
2411 && !check_cpu_feature (auxr->subclass))
2412 continue;
2413
2414 retval = hash_insert (arc_aux_hash, auxr->name, (void *) auxr);
2415 if (retval)
2416 as_fatal (_("internal error: can't hash aux register '%s': %s"),
2417 auxr->name, retval);
2418 }
2419 }
2420
2421 /* Write a value out to the object file, using the appropriate
2422 endianness. */
2423
2424 void
2425 md_number_to_chars (char *buf,
2426 valueT val,
2427 int n)
2428 {
2429 if (target_big_endian)
2430 number_to_chars_bigendian (buf, val, n);
2431 else
2432 number_to_chars_littleendian (buf, val, n);
2433 }
2434
2435 /* Round up a section size to the appropriate boundary. */
2436
2437 valueT
2438 md_section_align (segT segment,
2439 valueT size)
2440 {
2441 int align = bfd_get_section_alignment (stdoutput, segment);
2442
2443 return ((size + (1 << align) - 1) & (-((valueT) 1 << align)));
2444 }
2445
2446 /* The location from which a PC relative jump should be calculated,
2447 given a PC relative reloc. */
2448
2449 long
2450 md_pcrel_from_section (fixS *fixP,
2451 segT sec)
2452 {
2453 offsetT base = fixP->fx_where + fixP->fx_frag->fr_address;
2454
2455 pr_debug ("pcrel_from_section, fx_offset = %d\n", (int) fixP->fx_offset);
2456
2457 if (fixP->fx_addsy != (symbolS *) NULL
2458 && (!S_IS_DEFINED (fixP->fx_addsy)
2459 || S_GET_SEGMENT (fixP->fx_addsy) != sec))
2460 {
2461 pr_debug ("Unknown pcrel symbol: %s\n", S_GET_NAME (fixP->fx_addsy));
2462
2463 /* The symbol is undefined (or is defined but not in this section).
2464 Let the linker figure it out. */
2465 return 0;
2466 }
2467
2468 if ((int) fixP->fx_r_type < 0)
2469 {
2470 /* These are the "internal" relocations. Align them to
2471 32 bit boundary (PCL), for the moment. */
2472 base &= ~3;
2473 }
2474 else
2475 {
2476 switch (fixP->fx_r_type)
2477 {
2478 case BFD_RELOC_ARC_PC32:
2479 /* The hardware calculates relative to the start of the
2480 insn, but this relocation is relative to location of the
2481 LIMM, compensate. The base always needs to be
2482 substracted by 4 as we do not support this type of PCrel
2483 relocation for short instructions. */
2484 base -= 4;
2485 /* Fall through. */
2486 case BFD_RELOC_ARC_PLT32:
2487 case BFD_RELOC_ARC_S25H_PCREL_PLT:
2488 case BFD_RELOC_ARC_S21H_PCREL_PLT:
2489 case BFD_RELOC_ARC_S25W_PCREL_PLT:
2490 case BFD_RELOC_ARC_S21W_PCREL_PLT:
2491
2492 case BFD_RELOC_ARC_S21H_PCREL:
2493 case BFD_RELOC_ARC_S25H_PCREL:
2494 case BFD_RELOC_ARC_S13_PCREL:
2495 case BFD_RELOC_ARC_S21W_PCREL:
2496 case BFD_RELOC_ARC_S25W_PCREL:
2497 base &= ~3;
2498 break;
2499 default:
2500 as_bad_where (fixP->fx_file, fixP->fx_line,
2501 _("unhandled reloc %s in md_pcrel_from_section"),
2502 bfd_get_reloc_code_name (fixP->fx_r_type));
2503 break;
2504 }
2505 }
2506
2507 pr_debug ("pcrel from %x + %lx = %x, symbol: %s (%x)\n",
2508 fixP->fx_frag->fr_address, fixP->fx_where, base,
2509 fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "(null)",
2510 fixP->fx_addsy ? S_GET_VALUE (fixP->fx_addsy) : 0);
2511
2512 return base;
2513 }
2514
2515 /* Given a BFD relocation find the coresponding operand. */
2516
2517 static const struct arc_operand *
2518 find_operand_for_reloc (extended_bfd_reloc_code_real_type reloc)
2519 {
2520 unsigned i;
2521
2522 for (i = 0; i < arc_num_operands; i++)
2523 if (arc_operands[i].default_reloc == reloc)
2524 return &arc_operands[i];
2525 return NULL;
2526 }
2527
2528 /* Insert an operand value into an instruction. */
2529
2530 static unsigned
2531 insert_operand (unsigned insn,
2532 const struct arc_operand *operand,
2533 offsetT val,
2534 const char *file,
2535 unsigned line)
2536 {
2537 offsetT min = 0, max = 0;
2538
2539 if (operand->bits != 32
2540 && !(operand->flags & ARC_OPERAND_NCHK)
2541 && !(operand->flags & ARC_OPERAND_FAKE))
2542 {
2543 if (operand->flags & ARC_OPERAND_SIGNED)
2544 {
2545 max = (1 << (operand->bits - 1)) - 1;
2546 min = -(1 << (operand->bits - 1));
2547 }
2548 else
2549 {
2550 max = (1 << operand->bits) - 1;
2551 min = 0;
2552 }
2553
2554 if (val < min || val > max)
2555 as_bad_value_out_of_range (_("operand"),
2556 val, min, max, file, line);
2557 }
2558
2559 pr_debug ("insert field: %ld <= %ld <= %ld in 0x%08x\n",
2560 min, val, max, insn);
2561
2562 if ((operand->flags & ARC_OPERAND_ALIGNED32)
2563 && (val & 0x03))
2564 as_bad_where (file, line,
2565 _("Unaligned operand. Needs to be 32bit aligned"));
2566
2567 if ((operand->flags & ARC_OPERAND_ALIGNED16)
2568 && (val & 0x01))
2569 as_bad_where (file, line,
2570 _("Unaligned operand. Needs to be 16bit aligned"));
2571
2572 if (operand->insert)
2573 {
2574 const char *errmsg = NULL;
2575
2576 insn = (*operand->insert) (insn, val, &errmsg);
2577 if (errmsg)
2578 as_warn_where (file, line, "%s", errmsg);
2579 }
2580 else
2581 {
2582 if (operand->flags & ARC_OPERAND_TRUNCATE)
2583 {
2584 if (operand->flags & ARC_OPERAND_ALIGNED32)
2585 val >>= 2;
2586 if (operand->flags & ARC_OPERAND_ALIGNED16)
2587 val >>= 1;
2588 }
2589 insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
2590 }
2591 return insn;
2592 }
2593
2594 /* Apply a fixup to the object code. At this point all symbol values
2595 should be fully resolved, and we attempt to completely resolve the
2596 reloc. If we can not do that, we determine the correct reloc code
2597 and put it back in the fixup. To indicate that a fixup has been
2598 eliminated, set fixP->fx_done. */
2599
2600 void
2601 md_apply_fix (fixS *fixP,
2602 valueT *valP,
2603 segT seg)
2604 {
2605 char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
2606 valueT value = *valP;
2607 unsigned insn = 0;
2608 symbolS *fx_addsy, *fx_subsy;
2609 offsetT fx_offset;
2610 segT add_symbol_segment = absolute_section;
2611 segT sub_symbol_segment = absolute_section;
2612 const struct arc_operand *operand = NULL;
2613 extended_bfd_reloc_code_real_type reloc;
2614
2615 pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
2616 fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
2617 ((int) fixP->fx_r_type < 0) ? "Internal":
2618 bfd_get_reloc_code_name (fixP->fx_r_type), value,
2619 fixP->fx_offset);
2620
2621 fx_addsy = fixP->fx_addsy;
2622 fx_subsy = fixP->fx_subsy;
2623 fx_offset = 0;
2624
2625 if (fx_addsy)
2626 {
2627 add_symbol_segment = S_GET_SEGMENT (fx_addsy);
2628 }
2629
2630 if (fx_subsy
2631 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF
2632 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_DTPOFF_S9
2633 && fixP->fx_r_type != BFD_RELOC_ARC_TLS_GD_LD)
2634 {
2635 resolve_symbol_value (fx_subsy);
2636 sub_symbol_segment = S_GET_SEGMENT (fx_subsy);
2637
2638 if (sub_symbol_segment == absolute_section)
2639 {
2640 /* The symbol is really a constant. */
2641 fx_offset -= S_GET_VALUE (fx_subsy);
2642 fx_subsy = NULL;
2643 }
2644 else
2645 {
2646 as_bad_where (fixP->fx_file, fixP->fx_line,
2647 _("can't resolve `%s' {%s section} - `%s' {%s section}"),
2648 fx_addsy ? S_GET_NAME (fx_addsy) : "0",
2649 segment_name (add_symbol_segment),
2650 S_GET_NAME (fx_subsy),
2651 segment_name (sub_symbol_segment));
2652 return;
2653 }
2654 }
2655
2656 if (fx_addsy
2657 && !S_IS_WEAK (fx_addsy))
2658 {
2659 if (add_symbol_segment == seg
2660 && fixP->fx_pcrel)
2661 {
2662 value += S_GET_VALUE (fx_addsy);
2663 value -= md_pcrel_from_section (fixP, seg);
2664 fx_addsy = NULL;
2665 fixP->fx_pcrel = FALSE;
2666 }
2667 else if (add_symbol_segment == absolute_section)
2668 {
2669 value = fixP->fx_offset;
2670 fx_offset += S_GET_VALUE (fixP->fx_addsy);
2671 fx_addsy = NULL;
2672 fixP->fx_pcrel = FALSE;
2673 }
2674 }
2675
2676 if (!fx_addsy)
2677 fixP->fx_done = TRUE;
2678
2679 if (fixP->fx_pcrel)
2680 {
2681 if (fx_addsy
2682 && ((S_IS_DEFINED (fx_addsy)
2683 && S_GET_SEGMENT (fx_addsy) != seg)
2684 || S_IS_WEAK (fx_addsy)))
2685 value += md_pcrel_from_section (fixP, seg);
2686
2687 switch (fixP->fx_r_type)
2688 {
2689 case BFD_RELOC_ARC_32_ME:
2690 /* This is a pc-relative value in a LIMM. Adjust it to the
2691 address of the instruction not to the address of the
2692 LIMM. Note: it is not anylonger valid this afirmation as
2693 the linker consider ARC_PC32 a fixup to entire 64 bit
2694 insn. */
2695 fixP->fx_offset += fixP->fx_frag->fr_address;
2696 /* Fall through. */
2697 case BFD_RELOC_32:
2698 fixP->fx_r_type = BFD_RELOC_ARC_PC32;
2699 /* Fall through. */
2700 case BFD_RELOC_ARC_PC32:
2701 /* fixP->fx_offset += fixP->fx_where - fixP->fx_dot_value; */
2702 break;
2703 default:
2704 if ((int) fixP->fx_r_type < 0)
2705 as_fatal (_("PC relative relocation not allowed for (internal) type %d"),
2706 fixP->fx_r_type);
2707 break;
2708 }
2709 }
2710
2711 pr_debug ("%s:%u: apply_fix: r_type=%d (%s) value=0x%lX offset=0x%lX\n",
2712 fixP->fx_file, fixP->fx_line, fixP->fx_r_type,
2713 ((int) fixP->fx_r_type < 0) ? "Internal":
2714 bfd_get_reloc_code_name (fixP->fx_r_type), value,
2715 fixP->fx_offset);
2716
2717
2718 /* Now check for TLS relocations. */
2719 reloc = fixP->fx_r_type;
2720 switch (reloc)
2721 {
2722 case BFD_RELOC_ARC_TLS_DTPOFF:
2723 case BFD_RELOC_ARC_TLS_LE_32:
2724 if (fixP->fx_done)
2725 break;
2726 /* Fall through. */
2727 case BFD_RELOC_ARC_TLS_GD_GOT:
2728 case BFD_RELOC_ARC_TLS_IE_GOT:
2729 S_SET_THREAD_LOCAL (fixP->fx_addsy);
2730 break;
2731
2732 case BFD_RELOC_ARC_TLS_GD_LD:
2733 gas_assert (!fixP->fx_offset);
2734 if (fixP->fx_subsy)
2735 fixP->fx_offset
2736 = (S_GET_VALUE (fixP->fx_subsy)
2737 - fixP->fx_frag->fr_address- fixP->fx_where);
2738 fixP->fx_subsy = NULL;
2739 /* Fall through. */
2740 case BFD_RELOC_ARC_TLS_GD_CALL:
2741 /* These two relocs are there just to allow ld to change the tls
2742 model for this symbol, by patching the code. The offset -
2743 and scale, if any - will be installed by the linker. */
2744 S_SET_THREAD_LOCAL (fixP->fx_addsy);
2745 break;
2746
2747 case BFD_RELOC_ARC_TLS_LE_S9:
2748 case BFD_RELOC_ARC_TLS_DTPOFF_S9:
2749 as_bad (_("TLS_*_S9 relocs are not supported yet"));
2750 break;
2751
2752 default:
2753 break;
2754 }
2755
2756 if (!fixP->fx_done)
2757 {
2758 return;
2759 }
2760
2761 /* Addjust the value if we have a constant. */
2762 value += fx_offset;
2763
2764 /* For hosts with longs bigger than 32-bits make sure that the top
2765 bits of a 32-bit negative value read in by the parser are set,
2766 so that the correct comparisons are made. */
2767 if (value & 0x80000000)
2768 value |= (-1L << 31);
2769
2770 reloc = fixP->fx_r_type;
2771 switch (reloc)
2772 {
2773 case BFD_RELOC_8:
2774 case BFD_RELOC_16:
2775 case BFD_RELOC_24:
2776 case BFD_RELOC_32:
2777 case BFD_RELOC_64:
2778 case BFD_RELOC_ARC_32_PCREL:
2779 md_number_to_chars (fixpos, value, fixP->fx_size);
2780 return;
2781
2782 case BFD_RELOC_ARC_GOTPC32:
2783 /* I cannot fix an GOTPC relocation because I need to relax it
2784 from ld rx,[pcl,@sym@gotpc] to add rx,pcl,@sym@gotpc. */
2785 as_bad (_("Unsupported operation on reloc"));
2786 return;
2787
2788 case BFD_RELOC_ARC_TLS_DTPOFF:
2789 case BFD_RELOC_ARC_TLS_LE_32:
2790 gas_assert (!fixP->fx_addsy);
2791 gas_assert (!fixP->fx_subsy);
2792
2793 case BFD_RELOC_ARC_GOTOFF:
2794 case BFD_RELOC_ARC_32_ME:
2795 case BFD_RELOC_ARC_PC32:
2796 md_number_to_chars_midend (fixpos, value, fixP->fx_size);
2797 return;
2798
2799 case BFD_RELOC_ARC_PLT32:
2800 md_number_to_chars_midend (fixpos, value, fixP->fx_size);
2801 return;
2802
2803 case BFD_RELOC_ARC_S25H_PCREL_PLT:
2804 reloc = BFD_RELOC_ARC_S25W_PCREL;
2805 goto solve_plt;
2806
2807 case BFD_RELOC_ARC_S21H_PCREL_PLT:
2808 reloc = BFD_RELOC_ARC_S21H_PCREL;
2809 goto solve_plt;
2810
2811 case BFD_RELOC_ARC_S25W_PCREL_PLT:
2812 reloc = BFD_RELOC_ARC_S25W_PCREL;
2813 goto solve_plt;
2814
2815 case BFD_RELOC_ARC_S21W_PCREL_PLT:
2816 reloc = BFD_RELOC_ARC_S21W_PCREL;
2817
2818 case BFD_RELOC_ARC_S25W_PCREL:
2819 case BFD_RELOC_ARC_S21W_PCREL:
2820 case BFD_RELOC_ARC_S21H_PCREL:
2821 case BFD_RELOC_ARC_S25H_PCREL:
2822 case BFD_RELOC_ARC_S13_PCREL:
2823 solve_plt:
2824 operand = find_operand_for_reloc (reloc);
2825 gas_assert (operand);
2826 break;
2827
2828 default:
2829 {
2830 if ((int) fixP->fx_r_type >= 0)
2831 as_fatal (_("unhandled relocation type %s"),
2832 bfd_get_reloc_code_name (fixP->fx_r_type));
2833
2834 /* The rest of these fixups needs to be completely resolved as
2835 constants. */
2836 if (fixP->fx_addsy != 0
2837 && S_GET_SEGMENT (fixP->fx_addsy) != absolute_section)
2838 as_bad_where (fixP->fx_file, fixP->fx_line,
2839 _("non-absolute expression in constant field"));
2840
2841 gas_assert (-(int) fixP->fx_r_type < (int) arc_num_operands);
2842 operand = &arc_operands[-(int) fixP->fx_r_type];
2843 break;
2844 }
2845 }
2846
2847 if (target_big_endian)
2848 {
2849 switch (fixP->fx_size)
2850 {
2851 case 4:
2852 insn = bfd_getb32 (fixpos);
2853 break;
2854 case 2:
2855 insn = bfd_getb16 (fixpos);
2856 break;
2857 default:
2858 as_bad_where (fixP->fx_file, fixP->fx_line,
2859 _("unknown fixup size"));
2860 }
2861 }
2862 else
2863 {
2864 insn = 0;
2865 switch (fixP->fx_size)
2866 {
2867 case 4:
2868 insn = bfd_getl16 (fixpos) << 16 | bfd_getl16 (fixpos + 2);
2869 break;
2870 case 2:
2871 insn = bfd_getl16 (fixpos);
2872 break;
2873 default:
2874 as_bad_where (fixP->fx_file, fixP->fx_line,
2875 _("unknown fixup size"));
2876 }
2877 }
2878
2879 insn = insert_operand (insn, operand, (offsetT) value,
2880 fixP->fx_file, fixP->fx_line);
2881
2882 md_number_to_chars_midend (fixpos, insn, fixP->fx_size);
2883 }
2884
2885 /* Prepare machine-dependent frags for relaxation.
2886
2887 Called just before relaxation starts. Any symbol that is now undefined
2888 will not become defined.
2889
2890 Return the correct fr_subtype in the frag.
2891
2892 Return the initial "guess for fr_var" to caller. The guess for fr_var
2893 is *actually* the growth beyond fr_fix. Whatever we do to grow fr_fix
2894 or fr_var contributes to our returned value.
2895
2896 Although it may not be explicit in the frag, pretend
2897 fr_var starts with a value. */
2898
2899 int
2900 md_estimate_size_before_relax (fragS *fragP,
2901 segT segment)
2902 {
2903 int growth;
2904
2905 /* If the symbol is not located within the same section AND it's not
2906 an absolute section, use the maximum. OR if the symbol is a
2907 constant AND the insn is by nature not pc-rel, use the maximum.
2908 OR if the symbol is being equated against another symbol, use the
2909 maximum. OR if the symbol is weak use the maximum. */
2910 if ((S_GET_SEGMENT (fragP->fr_symbol) != segment
2911 && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section)
2912 || (symbol_constant_p (fragP->fr_symbol)
2913 && !fragP->tc_frag_data.pcrel)
2914 || symbol_equated_p (fragP->fr_symbol)
2915 || S_IS_WEAK (fragP->fr_symbol))
2916 {
2917 while (md_relax_table[fragP->fr_subtype].rlx_more != ARC_RLX_NONE)
2918 ++fragP->fr_subtype;
2919 }
2920
2921 growth = md_relax_table[fragP->fr_subtype].rlx_length;
2922 fragP->fr_var = growth;
2923
2924 pr_debug ("%s:%d: md_estimate_size_before_relax: %d\n",
2925 fragP->fr_file, fragP->fr_line, growth);
2926
2927 return growth;
2928 }
2929
2930 /* Translate internal representation of relocation info to BFD target
2931 format. */
2932
2933 arelent *
2934 tc_gen_reloc (asection *section ATTRIBUTE_UNUSED,
2935 fixS *fixP)
2936 {
2937 arelent *reloc;
2938 bfd_reloc_code_real_type code;
2939
2940 reloc = (arelent *) xmalloc (sizeof (* reloc));
2941 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
2942 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy);
2943 reloc->address = fixP->fx_frag->fr_address + fixP->fx_where;
2944
2945 /* Make sure none of our internal relocations make it this far.
2946 They'd better have been fully resolved by this point. */
2947 gas_assert ((int) fixP->fx_r_type > 0);
2948
2949 code = fixP->fx_r_type;
2950
2951 /* if we have something like add gp, pcl,
2952 _GLOBAL_OFFSET_TABLE_@gotpc. */
2953 if (code == BFD_RELOC_ARC_GOTPC32
2954 && GOT_symbol
2955 && fixP->fx_addsy == GOT_symbol)
2956 code = BFD_RELOC_ARC_GOTPC;
2957
2958 reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
2959 if (reloc->howto == NULL)
2960 {
2961 as_bad_where (fixP->fx_file, fixP->fx_line,
2962 _("cannot represent `%s' relocation in object file"),
2963 bfd_get_reloc_code_name (code));
2964 return NULL;
2965 }
2966
2967 if (!fixP->fx_pcrel != !reloc->howto->pc_relative)
2968 as_fatal (_("internal error? cannot generate `%s' relocation"),
2969 bfd_get_reloc_code_name (code));
2970
2971 gas_assert (!fixP->fx_pcrel == !reloc->howto->pc_relative);
2972
2973 if (code == BFD_RELOC_ARC_TLS_DTPOFF
2974 || code == BFD_RELOC_ARC_TLS_DTPOFF_S9)
2975 {
2976 asymbol *sym
2977 = fixP->fx_subsy ? symbol_get_bfdsym (fixP->fx_subsy) : NULL;
2978 /* We just want to store a 24 bit index, but we have to wait
2979 till after write_contents has been called via
2980 bfd_map_over_sections before we can get the index from
2981 _bfd_elf_symbol_from_bfd_symbol. Thus, the write_relocs
2982 function is elf32-arc.c has to pick up the slack.
2983 Unfortunately, this leads to problems with hosts that have
2984 pointers wider than long (bfd_vma). There would be various
2985 ways to handle this, all error-prone :-( */
2986 reloc->addend = (bfd_vma) sym;
2987 if ((asymbol *) reloc->addend != sym)
2988 {
2989 as_bad ("Can't store pointer\n");
2990 return NULL;
2991 }
2992 }
2993 else
2994 reloc->addend = fixP->fx_offset;
2995
2996 return reloc;
2997 }
2998
2999 /* Perform post-processing of machine-dependent frags after relaxation.
3000 Called after relaxation is finished.
3001 In: Address of frag.
3002 fr_type == rs_machine_dependent.
3003 fr_subtype is what the address relaxed to.
3004
3005 Out: Any fixS:s and constants are set up. */
3006
3007 void
3008 md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED,
3009 segT segment ATTRIBUTE_UNUSED,
3010 fragS *fragP)
3011 {
3012 const relax_typeS *table_entry;
3013 char *dest;
3014 const struct arc_opcode *opcode;
3015 struct arc_insn insn;
3016 int size, fix;
3017 struct arc_relax_type *relax_arg = &fragP->tc_frag_data;
3018
3019 fix = (fragP->fr_fix < 0 ? 0 : fragP->fr_fix);
3020 dest = fragP->fr_literal + fix;
3021 table_entry = TC_GENERIC_RELAX_TABLE + fragP->fr_subtype;
3022
3023 pr_debug ("%s:%d: md_convert_frag, subtype: %d, fix: %d, var: %d\n",
3024 fragP->fr_file, fragP->fr_line,
3025 fragP->fr_subtype, fix, fragP->fr_var);
3026
3027 if (fragP->fr_subtype <= 0
3028 && fragP->fr_subtype >= arc_num_relax_opcodes)
3029 as_fatal (_("no relaxation found for this instruction."));
3030
3031 opcode = &arc_relax_opcodes[fragP->fr_subtype];
3032
3033 assemble_insn (opcode, relax_arg->tok, relax_arg->ntok, relax_arg->pflags,
3034 relax_arg->nflg, &insn);
3035
3036 apply_fixups (&insn, fragP, fix);
3037
3038 size = insn.short_insn ? (insn.has_limm ? 6 : 2) : (insn.has_limm ? 8 : 4);
3039 gas_assert (table_entry->rlx_length == size);
3040 emit_insn0 (&insn, dest, TRUE);
3041
3042 fragP->fr_fix += table_entry->rlx_length;
3043 fragP->fr_var = 0;
3044 }
3045
3046 /* We have no need to default values of symbols. We could catch
3047 register names here, but that is handled by inserting them all in
3048 the symbol table to begin with. */
3049
3050 symbolS *
3051 md_undefined_symbol (char *name)
3052 {
3053 /* The arc abi demands that a GOT[0] should be referencible as
3054 [pc+_DYNAMIC@gotpc]. Hence we convert a _DYNAMIC@gotpc to a
3055 GOTPC reference to _GLOBAL_OFFSET_TABLE_. */
3056 if (((*name == '_')
3057 && (*(name+1) == 'G')
3058 && (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0))
3059 || ((*name == '_')
3060 && (*(name+1) == 'D')
3061 && (strcmp (name, DYNAMIC_STRUCT_NAME) == 0)))
3062 {
3063 if (!GOT_symbol)
3064 {
3065 if (symbol_find (name))
3066 as_bad ("GOT already in symbol table");
3067
3068 GOT_symbol = symbol_new (GLOBAL_OFFSET_TABLE_NAME, undefined_section,
3069 (valueT) 0, &zero_address_frag);
3070 };
3071 return GOT_symbol;
3072 }
3073 return NULL;
3074 }
3075
3076 /* Turn a string in input_line_pointer into a floating point constant
3077 of type type, and store the appropriate bytes in *litP. The number
3078 of LITTLENUMS emitted is stored in *sizeP. An error message is
3079 returned, or NULL on OK. */
3080
3081 const char *
3082 md_atof (int type, char *litP, int *sizeP)
3083 {
3084 return ieee_md_atof (type, litP, sizeP, target_big_endian);
3085 }
3086
3087 /* Called for any expression that can not be recognized. When the
3088 function is called, `input_line_pointer' will point to the start of
3089 the expression. */
3090
3091 void
3092 md_operand (expressionS *expressionP ATTRIBUTE_UNUSED)
3093 {
3094 char *p = input_line_pointer;
3095 if (*p == '@')
3096 {
3097 input_line_pointer++;
3098 expressionP->X_op = O_symbol;
3099 expression (expressionP);
3100 }
3101 }
3102
3103 /* This function is called from the function 'expression', it attempts
3104 to parse special names (in our case register names). It fills in
3105 the expression with the identified register. It returns TRUE if
3106 it is a register and FALSE otherwise. */
3107
3108 bfd_boolean
3109 arc_parse_name (const char *name,
3110 struct expressionS *e)
3111 {
3112 struct symbol *sym;
3113
3114 if (!assembling_insn)
3115 return FALSE;
3116
3117 /* Handle only registers. */
3118 if (e->X_op != O_absent)
3119 return FALSE;
3120
3121 sym = hash_find (arc_reg_hash, name);
3122 if (sym)
3123 {
3124 e->X_op = O_register;
3125 e->X_add_number = S_GET_VALUE (sym);
3126 return TRUE;
3127 }
3128 return FALSE;
3129 }
3130
3131 /* md_parse_option
3132 Invocation line includes a switch not recognized by the base assembler.
3133 See if it's a processor-specific option.
3134
3135 New options (supported) are:
3136
3137 -mcpu=<cpu name> Assemble for selected processor
3138 -EB/-mbig-endian Big-endian
3139 -EL/-mlittle-endian Little-endian
3140 -mrelax Enable relaxation
3141
3142 The following CPU names are recognized:
3143 arc700, av2em, av2hs. */
3144
3145 int
3146 md_parse_option (int c, const char *arg ATTRIBUTE_UNUSED)
3147 {
3148 switch (c)
3149 {
3150 case OPTION_ARC600:
3151 case OPTION_ARC601:
3152 return md_parse_option (OPTION_MCPU, "arc600");
3153
3154 case OPTION_ARC700:
3155 return md_parse_option (OPTION_MCPU, "arc700");
3156
3157 case OPTION_ARCEM:
3158 return md_parse_option (OPTION_MCPU, "arcem");
3159
3160 case OPTION_ARCHS:
3161 return md_parse_option (OPTION_MCPU, "archs");
3162
3163 case OPTION_MCPU:
3164 {
3165 arc_select_cpu (arg);
3166 mach_type_specified_p = TRUE;
3167 break;
3168 }
3169
3170 case OPTION_EB:
3171 arc_target_format = "elf32-bigarc";
3172 byte_order = BIG_ENDIAN;
3173 break;
3174
3175 case OPTION_EL:
3176 arc_target_format = "elf32-littlearc";
3177 byte_order = LITTLE_ENDIAN;
3178 break;
3179
3180 case OPTION_CD:
3181 /* This option has an effect only on ARC EM. */
3182 if (arc_target & ARC_OPCODE_ARCv2EM)
3183 arc_features |= ARC_CD;
3184 else
3185 as_warn (_("Code density option invalid for selected CPU"));
3186 break;
3187
3188 case OPTION_RELAX:
3189 relaxation_state = 1;
3190 break;
3191
3192 case OPTION_USER_MODE:
3193 case OPTION_LD_EXT_MASK:
3194 case OPTION_SWAP:
3195 case OPTION_NORM:
3196 case OPTION_BARREL_SHIFT:
3197 case OPTION_MIN_MAX:
3198 case OPTION_NO_MPY:
3199 case OPTION_EA:
3200 case OPTION_MUL64:
3201 case OPTION_SIMD:
3202 /* Dummy options are accepted but have no effect. */
3203 break;
3204
3205 case OPTION_SPFP:
3206 arc_features |= ARC_SPFP;
3207 break;
3208
3209 case OPTION_DPFP:
3210 arc_features |= ARC_DPFP;
3211 break;
3212
3213 case OPTION_XMAC_D16:
3214 case OPTION_XMAC_24:
3215 case OPTION_DSP_PACKA:
3216 case OPTION_CRC:
3217 case OPTION_DVBF:
3218 case OPTION_TELEPHONY:
3219 case OPTION_XYMEMORY:
3220 case OPTION_LOCK:
3221 case OPTION_SWAPE:
3222 case OPTION_RTSC:
3223 /* Dummy options are accepted but have no effect. */
3224 break;
3225
3226 case OPTION_FPUDA:
3227 /* This option has an effect only on ARC EM. */
3228 if (arc_target & ARC_OPCODE_ARCv2EM)
3229 arc_features |= ARC_FPUDA;
3230 else
3231 as_warn (_("FPUDA invalid for selected CPU"));
3232 break;
3233
3234 default:
3235 return 0;
3236 }
3237
3238 return 1;
3239 }
3240
3241 void
3242 md_show_usage (FILE *stream)
3243 {
3244 fprintf (stream, _("ARC-specific assembler options:\n"));
3245
3246 fprintf (stream, " -mcpu=<cpu name>\t assemble for CPU <cpu name>\n");
3247 fprintf (stream,
3248 " -mcode-density\t enable code density option for ARC EM\n");
3249
3250 fprintf (stream, _("\
3251 -EB assemble code for a big-endian cpu\n"));
3252 fprintf (stream, _("\
3253 -EL assemble code for a little-endian cpu\n"));
3254 fprintf (stream, _("\
3255 -mrelax Enable relaxation\n"));
3256
3257 }
3258
3259 /* Find the proper relocation for the given opcode. */
3260
3261 static extended_bfd_reloc_code_real_type
3262 find_reloc (const char *name,
3263 const char *opcodename,
3264 const struct arc_flags *pflags,
3265 int nflg,
3266 extended_bfd_reloc_code_real_type reloc)
3267 {
3268 unsigned int i;
3269 int j;
3270 bfd_boolean found_flag, tmp;
3271 extended_bfd_reloc_code_real_type ret = BFD_RELOC_UNUSED;
3272
3273 for (i = 0; i < arc_num_equiv_tab; i++)
3274 {
3275 const struct arc_reloc_equiv_tab *r = &arc_reloc_equiv[i];
3276
3277 /* Find the entry. */
3278 if (strcmp (name, r->name))
3279 continue;
3280 if (r->mnemonic && (strcmp (r->mnemonic, opcodename)))
3281 continue;
3282 if (r->flags[0])
3283 {
3284 if (!nflg)
3285 continue;
3286 found_flag = FALSE;
3287 unsigned * psflg = (unsigned *)r->flags;
3288 do
3289 {
3290 tmp = FALSE;
3291 for (j = 0; j < nflg; j++)
3292 if (!strcmp (pflags[j].name,
3293 arc_flag_operands[*psflg].name))
3294 {
3295 tmp = TRUE;
3296 break;
3297 }
3298 if (!tmp)
3299 {
3300 found_flag = FALSE;
3301 break;
3302 }
3303 else
3304 {
3305 found_flag = TRUE;
3306 }
3307 ++ psflg;
3308 } while (*psflg);
3309
3310 if (!found_flag)
3311 continue;
3312 }
3313
3314 if (reloc != r->oldreloc)
3315 continue;
3316 /* Found it. */
3317 ret = r->newreloc;
3318 break;
3319 }
3320
3321 if (ret == BFD_RELOC_UNUSED)
3322 as_bad (_("Unable to find %s relocation for instruction %s"),
3323 name, opcodename);
3324 return ret;
3325 }
3326
3327 /* All the symbol types that are allowed to be used for
3328 relaxation. */
3329
3330 static bfd_boolean
3331 may_relax_expr (expressionS tok)
3332 {
3333 /* Check if we have unrelaxable relocs. */
3334 switch (tok.X_md)
3335 {
3336 default:
3337 break;
3338 case O_plt:
3339 return FALSE;
3340 }
3341
3342 switch (tok.X_op)
3343 {
3344 case O_symbol:
3345 case O_multiply:
3346 case O_divide:
3347 case O_modulus:
3348 case O_add:
3349 case O_subtract:
3350 break;
3351
3352 default:
3353 return FALSE;
3354 }
3355 return TRUE;
3356 }
3357
3358 /* Checks if flags are in line with relaxable insn. */
3359
3360 static bfd_boolean
3361 relaxable_flag (const struct arc_relaxable_ins *ins,
3362 const struct arc_flags *pflags,
3363 int nflgs)
3364 {
3365 unsigned flag_class,
3366 flag,
3367 flag_class_idx = 0,
3368 flag_idx = 0;
3369
3370 const struct arc_flag_operand *flag_opand;
3371 int i, counttrue = 0;
3372
3373 /* Iterate through flags classes. */
3374 while ((flag_class = ins->flag_classes[flag_class_idx]) != 0)
3375 {
3376 /* Iterate through flags in flag class. */
3377 while ((flag = arc_flag_classes[flag_class].flags[flag_idx])
3378 != 0)
3379 {
3380 flag_opand = &arc_flag_operands[flag];
3381 /* Iterate through flags in ins to compare. */
3382 for (i = 0; i < nflgs; ++i)
3383 {
3384 if (strcmp (flag_opand->name, pflags[i].name) == 0)
3385 ++counttrue;
3386 }
3387
3388 ++flag_idx;
3389 }
3390
3391 ++flag_class_idx;
3392 flag_idx = 0;
3393 }
3394
3395 /* If counttrue == nflgs, then all flags have been found. */
3396 return (counttrue == nflgs ? TRUE : FALSE);
3397 }
3398
3399 /* Checks if operands are in line with relaxable insn. */
3400
3401 static bfd_boolean
3402 relaxable_operand (const struct arc_relaxable_ins *ins,
3403 const expressionS *tok,
3404 int ntok)
3405 {
3406 const enum rlx_operand_type *operand = &ins->operands[0];
3407 int i = 0;
3408
3409 while (*operand != EMPTY)
3410 {
3411 const expressionS *epr = &tok[i];
3412
3413 if (i != 0 && i >= ntok)
3414 return FALSE;
3415
3416 switch (*operand)
3417 {
3418 case IMMEDIATE:
3419 if (!(epr->X_op == O_multiply
3420 || epr->X_op == O_divide
3421 || epr->X_op == O_modulus
3422 || epr->X_op == O_add
3423 || epr->X_op == O_subtract
3424 || epr->X_op == O_symbol))
3425 return FALSE;
3426 break;
3427
3428 case REGISTER_DUP:
3429 if ((i <= 0)
3430 || (epr->X_add_number != tok[i - 1].X_add_number))
3431 return FALSE;
3432 /* Fall through. */
3433 case REGISTER:
3434 if (epr->X_op != O_register)
3435 return FALSE;
3436 break;
3437
3438 case REGISTER_S:
3439 if (epr->X_op != O_register)
3440 return FALSE;
3441
3442 switch (epr->X_add_number)
3443 {
3444 case 0: case 1: case 2: case 3:
3445 case 12: case 13: case 14: case 15:
3446 break;
3447 default:
3448 return FALSE;
3449 }
3450 break;
3451
3452 case REGISTER_NO_GP:
3453 if ((epr->X_op != O_register)
3454 || (epr->X_add_number == 26)) /* 26 is the gp register. */
3455 return FALSE;
3456 break;
3457
3458 case BRACKET:
3459 if (epr->X_op != O_bracket)
3460 return FALSE;
3461 break;
3462
3463 default:
3464 /* Don't understand, bail out. */
3465 return FALSE;
3466 break;
3467 }
3468
3469 ++i;
3470 operand = &ins->operands[i];
3471 }
3472
3473 return (i == ntok ? TRUE : FALSE);
3474 }
3475
3476 /* Return TRUE if this OPDCODE is a candidate for relaxation. */
3477
3478 static bfd_boolean
3479 relax_insn_p (const struct arc_opcode *opcode,
3480 const expressionS *tok,
3481 int ntok,
3482 const struct arc_flags *pflags,
3483 int nflg)
3484 {
3485 unsigned i;
3486 bfd_boolean rv = FALSE;
3487
3488 /* Check the relaxation table. */
3489 for (i = 0; i < arc_num_relaxable_ins && relaxation_state; ++i)
3490 {
3491 const struct arc_relaxable_ins *arc_rlx_ins = &arc_relaxable_insns[i];
3492
3493 if ((strcmp (opcode->name, arc_rlx_ins->mnemonic_r) == 0)
3494 && may_relax_expr (tok[arc_rlx_ins->opcheckidx])
3495 && relaxable_operand (arc_rlx_ins, tok, ntok)
3496 && relaxable_flag (arc_rlx_ins, pflags, nflg))
3497 {
3498 rv = TRUE;
3499 frag_now->fr_subtype = arc_relaxable_insns[i].subtype;
3500 memcpy (&frag_now->tc_frag_data.tok, tok,
3501 sizeof (expressionS) * ntok);
3502 memcpy (&frag_now->tc_frag_data.pflags, pflags,
3503 sizeof (struct arc_flags) * nflg);
3504 frag_now->tc_frag_data.nflg = nflg;
3505 frag_now->tc_frag_data.ntok = ntok;
3506 break;
3507 }
3508 }
3509
3510 return rv;
3511 }
3512
3513 /* Turn an opcode description and a set of arguments into
3514 an instruction and a fixup. */
3515
3516 static void
3517 assemble_insn (const struct arc_opcode *opcode,
3518 const expressionS *tok,
3519 int ntok,
3520 const struct arc_flags *pflags,
3521 int nflg,
3522 struct arc_insn *insn)
3523 {
3524 const expressionS *reloc_exp = NULL;
3525 unsigned image;
3526 const unsigned char *argidx;
3527 int i;
3528 int tokidx = 0;
3529 unsigned char pcrel = 0;
3530 bfd_boolean needGOTSymbol;
3531 bfd_boolean has_delay_slot = FALSE;
3532 extended_bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED;
3533
3534 memset (insn, 0, sizeof (*insn));
3535 image = opcode->opcode;
3536
3537 pr_debug ("%s:%d: assemble_insn: %s using opcode %x\n",
3538 frag_now->fr_file, frag_now->fr_line, opcode->name,
3539 opcode->opcode);
3540
3541 /* Handle operands. */
3542 for (argidx = opcode->operands; *argidx; ++argidx)
3543 {
3544 const struct arc_operand *operand = &arc_operands[*argidx];
3545 const expressionS *t = (const expressionS *) 0;
3546
3547 if ((operand->flags & ARC_OPERAND_FAKE)
3548 && !(operand->flags & ARC_OPERAND_BRAKET))
3549 continue;
3550
3551 if (operand->flags & ARC_OPERAND_DUPLICATE)
3552 {
3553 /* Duplicate operand, already inserted. */
3554 tokidx ++;
3555 continue;
3556 }
3557
3558 if (tokidx >= ntok)
3559 {
3560 abort ();
3561 }
3562 else
3563 t = &tok[tokidx++];
3564
3565 /* Regardless if we have a reloc or not mark the instruction
3566 limm if it is the case. */
3567 if (operand->flags & ARC_OPERAND_LIMM)
3568 insn->has_limm = TRUE;
3569
3570 switch (t->X_op)
3571 {
3572 case O_register:
3573 image = insert_operand (image, operand, regno (t->X_add_number),
3574 NULL, 0);
3575 break;
3576
3577 case O_constant:
3578 image = insert_operand (image, operand, t->X_add_number, NULL, 0);
3579 reloc_exp = t;
3580 if (operand->flags & ARC_OPERAND_LIMM)
3581 insn->limm = t->X_add_number;
3582 break;
3583
3584 case O_bracket:
3585 /* Ignore brackets. */
3586 break;
3587
3588 case O_absent:
3589 gas_assert (operand->flags & ARC_OPERAND_IGNORE);
3590 break;
3591
3592 case O_subtract:
3593 /* Maybe register range. */
3594 if ((t->X_add_number == 0)
3595 && contains_register (t->X_add_symbol)
3596 && contains_register (t->X_op_symbol))
3597 {
3598 int regs;
3599
3600 regs = get_register (t->X_add_symbol);
3601 regs <<= 16;
3602 regs |= get_register (t->X_op_symbol);
3603 image = insert_operand (image, operand, regs, NULL, 0);
3604 break;
3605 }
3606
3607 default:
3608 /* This operand needs a relocation. */
3609 needGOTSymbol = FALSE;
3610
3611 switch (t->X_md)
3612 {
3613 case O_plt:
3614 if (opcode->class == JUMP)
3615 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3616 _("Unable to use @plt relocatio for insn %s"),
3617 opcode->name);
3618 needGOTSymbol = TRUE;
3619 reloc = find_reloc ("plt", opcode->name,
3620 pflags, nflg,
3621 operand->default_reloc);
3622 break;
3623
3624 case O_gotoff:
3625 case O_gotpc:
3626 needGOTSymbol = TRUE;
3627 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3628 break;
3629 case O_pcl:
3630 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3631 if (ARC_SHORT (opcode->mask) || opcode->class == JUMP)
3632 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3633 _("Unable to use @pcl relocation for insn %s"),
3634 opcode->name);
3635 break;
3636 case O_sda:
3637 reloc = find_reloc ("sda", opcode->name,
3638 pflags, nflg,
3639 operand->default_reloc);
3640 break;
3641 case O_tlsgd:
3642 case O_tlsie:
3643 needGOTSymbol = TRUE;
3644 /* Fall-through. */
3645
3646 case O_tpoff:
3647 case O_dtpoff:
3648 reloc = ARC_RELOC_TABLE (t->X_md)->reloc;
3649 break;
3650
3651 case O_tpoff9: /*FIXME! Check for the conditionality of
3652 the insn. */
3653 case O_dtpoff9: /*FIXME! Check for the conditionality of
3654 the insn. */
3655 as_bad (_("TLS_*_S9 relocs are not supported yet"));
3656 break;
3657
3658 default:
3659 /* Just consider the default relocation. */
3660 reloc = operand->default_reloc;
3661 break;
3662 }
3663
3664 if (needGOTSymbol && (GOT_symbol == NULL))
3665 GOT_symbol = symbol_find_or_make (GLOBAL_OFFSET_TABLE_NAME);
3666
3667 reloc_exp = t;
3668
3669 #if 0
3670 if (reloc > 0)
3671 {
3672 /* sanity checks. */
3673 reloc_howto_type *reloc_howto
3674 = bfd_reloc_type_lookup (stdoutput,
3675 (bfd_reloc_code_real_type) reloc);
3676 unsigned reloc_bitsize = reloc_howto->bitsize;
3677 if (reloc_howto->rightshift)
3678 reloc_bitsize -= reloc_howto->rightshift;
3679 if (reloc_bitsize != operand->bits)
3680 {
3681 as_bad (_("invalid relocation %s for field"),
3682 bfd_get_reloc_code_name (reloc));
3683 return;
3684 }
3685 }
3686 #endif
3687 if (insn->nfixups >= MAX_INSN_FIXUPS)
3688 as_fatal (_("too many fixups"));
3689
3690 struct arc_fixup *fixup;
3691 fixup = &insn->fixups[insn->nfixups++];
3692 fixup->exp = *t;
3693 fixup->reloc = reloc;
3694 pcrel = (operand->flags & ARC_OPERAND_PCREL) ? 1 : 0;
3695 fixup->pcrel = pcrel;
3696 fixup->islong = (operand->flags & ARC_OPERAND_LIMM) ?
3697 TRUE : FALSE;
3698 break;
3699 }
3700 }
3701
3702 /* Handle flags. */
3703 for (i = 0; i < nflg; i++)
3704 {
3705 const struct arc_flag_operand *flg_operand = pflags[i].flgp;
3706
3707 /* Check if the instruction has a delay slot. */
3708 if (!strcmp (flg_operand->name, "d"))
3709 has_delay_slot = TRUE;
3710
3711 /* There is an exceptional case when we cannot insert a flag
3712 just as it is. The .T flag must be handled in relation with
3713 the relative address. */
3714 if (!strcmp (flg_operand->name, "t")
3715 || !strcmp (flg_operand->name, "nt"))
3716 {
3717 unsigned bitYoperand = 0;
3718 /* FIXME! move selection bbit/brcc in arc-opc.c. */
3719 if (!strcmp (flg_operand->name, "t"))
3720 if (!strcmp (opcode->name, "bbit0")
3721 || !strcmp (opcode->name, "bbit1"))
3722 bitYoperand = arc_NToperand;
3723 else
3724 bitYoperand = arc_Toperand;
3725 else
3726 if (!strcmp (opcode->name, "bbit0")
3727 || !strcmp (opcode->name, "bbit1"))
3728 bitYoperand = arc_Toperand;
3729 else
3730 bitYoperand = arc_NToperand;
3731
3732 gas_assert (reloc_exp != NULL);
3733 if (reloc_exp->X_op == O_constant)
3734 {
3735 /* Check if we have a constant and solved it
3736 immediately. */
3737 offsetT val = reloc_exp->X_add_number;
3738 image |= insert_operand (image, &arc_operands[bitYoperand],
3739 val, NULL, 0);
3740 }
3741 else
3742 {
3743 struct arc_fixup *fixup;
3744
3745 if (insn->nfixups >= MAX_INSN_FIXUPS)
3746 as_fatal (_("too many fixups"));
3747
3748 fixup = &insn->fixups[insn->nfixups++];
3749 fixup->exp = *reloc_exp;
3750 fixup->reloc = -bitYoperand;
3751 fixup->pcrel = pcrel;
3752 fixup->islong = FALSE;
3753 }
3754 }
3755 else
3756 image |= (flg_operand->code & ((1 << flg_operand->bits) - 1))
3757 << flg_operand->shift;
3758 }
3759
3760 insn->relax = relax_insn_p (opcode, tok, ntok, pflags, nflg);
3761
3762 /* Short instruction? */
3763 insn->short_insn = ARC_SHORT (opcode->mask) ? TRUE : FALSE;
3764
3765 insn->insn = image;
3766
3767 /* Update last insn status. */
3768 arc_last_insns[1] = arc_last_insns[0];
3769 arc_last_insns[0].opcode = opcode;
3770 arc_last_insns[0].has_limm = insn->has_limm;
3771 arc_last_insns[0].has_delay_slot = has_delay_slot;
3772
3773 /* Check if the current instruction is legally used. */
3774 if (arc_last_insns[1].has_delay_slot
3775 && is_br_jmp_insn_p (arc_last_insns[0].opcode))
3776 as_bad_where (frag_now->fr_file, frag_now->fr_line,
3777 _("A jump/branch instruction in delay slot."));
3778 }
3779
3780 void
3781 arc_handle_align (fragS* fragP)
3782 {
3783 if ((fragP)->fr_type == rs_align_code)
3784 {
3785 char *dest = (fragP)->fr_literal + (fragP)->fr_fix;
3786 valueT count = ((fragP)->fr_next->fr_address
3787 - (fragP)->fr_address - (fragP)->fr_fix);
3788
3789 (fragP)->fr_var = 2;
3790
3791 if (count & 1)/* Padding in the gap till the next 2-byte
3792 boundary with 0s. */
3793 {
3794 (fragP)->fr_fix++;
3795 *dest++ = 0;
3796 }
3797 /* Writing nop_s. */
3798 md_number_to_chars (dest, NOP_OPCODE_S, 2);
3799 }
3800 }
3801
3802 /* Here we decide which fixups can be adjusted to make them relative
3803 to the beginning of the section instead of the symbol. Basically
3804 we need to make sure that the dynamic relocations are done
3805 correctly, so in some cases we force the original symbol to be
3806 used. */
3807
3808 int
3809 tc_arc_fix_adjustable (fixS *fixP)
3810 {
3811
3812 /* Prevent all adjustments to global symbols. */
3813 if (S_IS_EXTERNAL (fixP->fx_addsy))
3814 return 0;
3815 if (S_IS_WEAK (fixP->fx_addsy))
3816 return 0;
3817
3818 /* Adjust_reloc_syms doesn't know about the GOT. */
3819 switch (fixP->fx_r_type)
3820 {
3821 case BFD_RELOC_ARC_GOTPC32:
3822 case BFD_RELOC_ARC_PLT32:
3823 case BFD_RELOC_ARC_S25H_PCREL_PLT:
3824 case BFD_RELOC_ARC_S21H_PCREL_PLT:
3825 case BFD_RELOC_ARC_S25W_PCREL_PLT:
3826 case BFD_RELOC_ARC_S21W_PCREL_PLT:
3827 return 0;
3828
3829 default:
3830 break;
3831 }
3832
3833 return 1;
3834 }
3835
3836 /* Compute the reloc type of an expression EXP. */
3837
3838 static void
3839 arc_check_reloc (expressionS *exp,
3840 bfd_reloc_code_real_type *r_type_p)
3841 {
3842 if (*r_type_p == BFD_RELOC_32
3843 && exp->X_op == O_subtract
3844 && exp->X_op_symbol != NULL
3845 && exp->X_op_symbol->bsym->section == now_seg)
3846 *r_type_p = BFD_RELOC_ARC_32_PCREL;
3847 }
3848
3849
3850 /* Add expression EXP of SIZE bytes to offset OFF of fragment FRAG. */
3851
3852 void
3853 arc_cons_fix_new (fragS *frag,
3854 int off,
3855 int size,
3856 expressionS *exp,
3857 bfd_reloc_code_real_type r_type)
3858 {
3859 r_type = BFD_RELOC_UNUSED;
3860
3861 switch (size)
3862 {
3863 case 1:
3864 r_type = BFD_RELOC_8;
3865 break;
3866
3867 case 2:
3868 r_type = BFD_RELOC_16;
3869 break;
3870
3871 case 3:
3872 r_type = BFD_RELOC_24;
3873 break;
3874
3875 case 4:
3876 r_type = BFD_RELOC_32;
3877 arc_check_reloc (exp, &r_type);
3878 break;
3879
3880 case 8:
3881 r_type = BFD_RELOC_64;
3882 break;
3883
3884 default:
3885 as_bad (_("unsupported BFD relocation size %u"), size);
3886 r_type = BFD_RELOC_UNUSED;
3887 }
3888
3889 fix_new_exp (frag, off, size, exp, 0, r_type);
3890 }
3891
3892 /* The actual routine that checks the ZOL conditions. */
3893
3894 static void
3895 check_zol (symbolS *s)
3896 {
3897 switch (arc_mach_type)
3898 {
3899 case bfd_mach_arc_arcv2:
3900 if (arc_target & ARC_OPCODE_ARCv2EM)
3901 return;
3902
3903 if (is_br_jmp_insn_p (arc_last_insns[0].opcode)
3904 || arc_last_insns[1].has_delay_slot)
3905 as_bad (_("Jump/Branch instruction detected at the end of the ZOL label @%s"),
3906 S_GET_NAME (s));
3907
3908 break;
3909 case bfd_mach_arc_arc600:
3910
3911 if (is_kernel_insn_p (arc_last_insns[0].opcode))
3912 as_bad (_("Kernel instruction detected at the end of the ZOL label @%s"),
3913 S_GET_NAME (s));
3914
3915 if (arc_last_insns[0].has_limm
3916 && is_br_jmp_insn_p (arc_last_insns[0].opcode))
3917 as_bad (_("A jump instruction with long immediate detected at the \
3918 end of the ZOL label @%s"), S_GET_NAME (s));
3919
3920 /* Fall through. */
3921 case bfd_mach_arc_nps400:
3922 case bfd_mach_arc_arc700:
3923 if (arc_last_insns[0].has_delay_slot)
3924 as_bad (_("An illegal use of delay slot detected at the end of the ZOL label @%s"),
3925 S_GET_NAME (s));
3926
3927 break;
3928 default:
3929 break;
3930 }
3931 }
3932
3933 /* If ZOL end check the last two instruction for illegals. */
3934 void
3935 arc_frob_label (symbolS * sym)
3936 {
3937 if (ARC_GET_FLAG (sym) & ARC_FLAG_ZOL)
3938 check_zol (sym);
3939
3940 dwarf2_emit_label (sym);
3941 }
3942
3943 /* Used because generic relaxation assumes a pc-rel value whilst we
3944 also relax instructions that use an absolute value resolved out of
3945 relative values (if that makes any sense). An example: 'add r1,
3946 r2, @.L2 - .' The symbols . and @.L2 are relative to the section
3947 but if they're in the same section we can subtract the section
3948 offset relocation which ends up in a resolved value. So if @.L2 is
3949 .text + 0x50 and . is .text + 0x10, we can say that .text + 0x50 -
3950 .text + 0x40 = 0x10. */
3951 int
3952 arc_pcrel_adjust (fragS *fragP)
3953 {
3954 if (!fragP->tc_frag_data.pcrel)
3955 return fragP->fr_address + fragP->fr_fix;
3956
3957 return 0;
3958 }
3959
3960 /* Initialize the DWARF-2 unwind information for this procedure. */
3961
3962 void
3963 tc_arc_frame_initial_instructions (void)
3964 {
3965 /* Stack pointer is register 28. */
3966 cfi_add_CFA_def_cfa_register (28);
3967 }
3968
3969 int
3970 tc_arc_regname_to_dw2regnum (char *regname)
3971 {
3972 struct symbol *sym;
3973
3974 sym = hash_find (arc_reg_hash, regname);
3975 if (sym)
3976 return S_GET_VALUE (sym);
3977
3978 return -1;
3979 }
3980
3981 /* Adjust the symbol table. Delete found AUX register symbols. */
3982
3983 void
3984 arc_adjust_symtab (void)
3985 {
3986 symbolS * sym;
3987
3988 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
3989 {
3990 /* I've created a symbol during parsing process. Now, remove
3991 the symbol as it is found to be an AUX register. */
3992 if (ARC_GET_FLAG (sym) & ARC_FLAG_AUX)
3993 symbol_remove (sym, &symbol_rootP, &symbol_lastP);
3994 }
3995
3996 /* Now do generic ELF adjustments. */
3997 elf_adjust_symtab ();
3998 }
3999
4000 static void
4001 tokenize_extinsn (extInstruction_t *einsn)
4002 {
4003 char *p, c;
4004 char *insn_name;
4005 unsigned char major_opcode;
4006 unsigned char sub_opcode;
4007 unsigned char syntax_class = 0;
4008 unsigned char syntax_class_modifiers = 0;
4009 unsigned char suffix_class = 0;
4010 unsigned int i;
4011
4012 SKIP_WHITESPACE ();
4013
4014 /* 1st: get instruction name. */
4015 p = input_line_pointer;
4016 c = get_symbol_name (&p);
4017
4018 insn_name = xstrdup (p);
4019 restore_line_pointer (c);
4020
4021 /* 2nd: get major opcode. */
4022 if (*input_line_pointer != ',')
4023 {
4024 as_bad (_("expected comma after instruction name"));
4025 ignore_rest_of_line ();
4026 return;
4027 }
4028 input_line_pointer++;
4029 major_opcode = get_absolute_expression ();
4030
4031 /* 3rd: get sub-opcode. */
4032 SKIP_WHITESPACE ();
4033
4034 if (*input_line_pointer != ',')
4035 {
4036 as_bad (_("expected comma after major opcode"));
4037 ignore_rest_of_line ();
4038 return;
4039 }
4040 input_line_pointer++;
4041 sub_opcode = get_absolute_expression ();
4042
4043 /* 4th: get suffix class. */
4044 SKIP_WHITESPACE ();
4045
4046 if (*input_line_pointer != ',')
4047 {
4048 as_bad ("expected comma after sub opcode");
4049 ignore_rest_of_line ();
4050 return;
4051 }
4052 input_line_pointer++;
4053
4054 while (1)
4055 {
4056 SKIP_WHITESPACE ();
4057
4058 for (i = 0; i < ARRAY_SIZE (suffixclass); i++)
4059 {
4060 if (!strncmp (suffixclass[i].name, input_line_pointer,
4061 suffixclass[i].len))
4062 {
4063 suffix_class |= suffixclass[i].class;
4064 input_line_pointer += suffixclass[i].len;
4065 break;
4066 }
4067 }
4068
4069 if (i == ARRAY_SIZE (suffixclass))
4070 {
4071 as_bad ("invalid suffix class");
4072 ignore_rest_of_line ();
4073 return;
4074 }
4075
4076 SKIP_WHITESPACE ();
4077
4078 if (*input_line_pointer == '|')
4079 input_line_pointer++;
4080 else
4081 break;
4082 }
4083
4084 /* 5th: get syntax class and syntax class modifiers. */
4085 if (*input_line_pointer != ',')
4086 {
4087 as_bad ("expected comma after suffix class");
4088 ignore_rest_of_line ();
4089 return;
4090 }
4091 input_line_pointer++;
4092
4093 while (1)
4094 {
4095 SKIP_WHITESPACE ();
4096
4097 for (i = 0; i < ARRAY_SIZE (syntaxclassmod); i++)
4098 {
4099 if (!strncmp (syntaxclassmod[i].name,
4100 input_line_pointer,
4101 syntaxclassmod[i].len))
4102 {
4103 syntax_class_modifiers |= syntaxclassmod[i].class;
4104 input_line_pointer += syntaxclassmod[i].len;
4105 break;
4106 }
4107 }
4108
4109 if (i == ARRAY_SIZE (syntaxclassmod))
4110 {
4111 for (i = 0; i < ARRAY_SIZE (syntaxclass); i++)
4112 {
4113 if (!strncmp (syntaxclass[i].name,
4114 input_line_pointer,
4115 syntaxclass[i].len))
4116 {
4117 syntax_class |= syntaxclass[i].class;
4118 input_line_pointer += syntaxclass[i].len;
4119 break;
4120 }
4121 }
4122
4123 if (i == ARRAY_SIZE (syntaxclass))
4124 {
4125 as_bad ("missing syntax class");
4126 ignore_rest_of_line ();
4127 return;
4128 }
4129 }
4130
4131 SKIP_WHITESPACE ();
4132
4133 if (*input_line_pointer == '|')
4134 input_line_pointer++;
4135 else
4136 break;
4137 }
4138
4139 demand_empty_rest_of_line ();
4140
4141 einsn->name = insn_name;
4142 einsn->major = major_opcode;
4143 einsn->minor = sub_opcode;
4144 einsn->syntax = syntax_class;
4145 einsn->modsyn = syntax_class_modifiers;
4146 einsn->suffix = suffix_class;
4147 einsn->flags = syntax_class
4148 | (syntax_class_modifiers & ARC_OP1_IMM_IMPLIED ? 0x10 : 0);
4149 }
4150
4151 /* Generate an extension section. */
4152
4153 static int
4154 arc_set_ext_seg (void)
4155 {
4156 if (!arcext_section)
4157 {
4158 arcext_section = subseg_new (".arcextmap", 0);
4159 bfd_set_section_flags (stdoutput, arcext_section,
4160 SEC_READONLY | SEC_HAS_CONTENTS);
4161 }
4162 else
4163 subseg_set (arcext_section, 0);
4164 return 1;
4165 }
4166
4167 /* Create an extension instruction description in the arc extension
4168 section of the output file.
4169 The structure for an instruction is like this:
4170 [0]: Length of the record.
4171 [1]: Type of the record.
4172
4173 [2]: Major opcode.
4174 [3]: Sub-opcode.
4175 [4]: Syntax (flags).
4176 [5]+ Name instruction.
4177
4178 The sequence is terminated by an empty entry. */
4179
4180 static void
4181 create_extinst_section (extInstruction_t *einsn)
4182 {
4183
4184 segT old_sec = now_seg;
4185 int old_subsec = now_subseg;
4186 char *p;
4187 int name_len = strlen (einsn->name);
4188
4189 arc_set_ext_seg ();
4190
4191 p = frag_more (1);
4192 *p = 5 + name_len + 1;
4193 p = frag_more (1);
4194 *p = EXT_INSTRUCTION;
4195 p = frag_more (1);
4196 *p = einsn->major;
4197 p = frag_more (1);
4198 *p = einsn->minor;
4199 p = frag_more (1);
4200 *p = einsn->flags;
4201 p = frag_more (name_len + 1);
4202 strcpy (p, einsn->name);
4203
4204 subseg_set (old_sec, old_subsec);
4205 }
4206
4207 /* Handler .extinstruction pseudo-op. */
4208
4209 static void
4210 arc_extinsn (int ignore ATTRIBUTE_UNUSED)
4211 {
4212 extInstruction_t einsn;
4213 struct arc_opcode *arc_ext_opcodes;
4214 const char *errmsg = NULL;
4215 unsigned char moplow, mophigh;
4216
4217 memset (&einsn, 0, sizeof (einsn));
4218 tokenize_extinsn (&einsn);
4219
4220 /* Check if the name is already used. */
4221 if (arc_find_opcode (einsn.name))
4222 as_warn (_("Pseudocode already used %s"), einsn.name);
4223
4224 /* Check the opcode ranges. */
4225 moplow = 0x05;
4226 mophigh = (arc_target & (ARC_OPCODE_ARCv2EM
4227 | ARC_OPCODE_ARCv2HS)) ? 0x07 : 0x0a;
4228
4229 if ((einsn.major > mophigh) || (einsn.major < moplow))
4230 as_fatal (_("major opcode not in range [0x%02x - 0x%02x]"), moplow, mophigh);
4231
4232 if ((einsn.minor > 0x3f) && (einsn.major != 0x0a)
4233 && (einsn.major != 5) && (einsn.major != 9))
4234 as_fatal (_("minor opcode not in range [0x00 - 0x3f]"));
4235
4236 switch (einsn.syntax & (ARC_SYNTAX_3OP | ARC_SYNTAX_2OP))
4237 {
4238 case ARC_SYNTAX_3OP:
4239 if (einsn.modsyn & ARC_OP1_IMM_IMPLIED)
4240 as_fatal (_("Improper use of OP1_IMM_IMPLIED"));
4241 break;
4242 case ARC_SYNTAX_2OP:
4243 if (einsn.modsyn & ARC_OP1_MUST_BE_IMM)
4244 as_fatal (_("Improper use of OP1_MUST_BE_IMM"));
4245 break;
4246 default:
4247 break;
4248 }
4249
4250 arc_ext_opcodes = arcExtMap_genOpcode (&einsn, arc_target, &errmsg);
4251 if (arc_ext_opcodes == NULL)
4252 {
4253 if (errmsg)
4254 as_fatal ("%s", errmsg);
4255 else
4256 as_fatal (_("Couldn't generate extension instruction opcodes"));
4257 }
4258 else if (errmsg)
4259 as_warn ("%s", errmsg);
4260
4261 /* Insert the extension instruction. */
4262 arc_insert_opcode ((const struct arc_opcode *) arc_ext_opcodes);
4263
4264 create_extinst_section (&einsn);
4265 }
4266
4267 static void
4268 tokenize_extregister (extRegister_t *ereg, int opertype)
4269 {
4270 char *name;
4271 char *mode;
4272 char c;
4273 char *p;
4274 int number, imode = 0;
4275 bfd_boolean isCore_p = (opertype == EXT_CORE_REGISTER) ? TRUE : FALSE;
4276 bfd_boolean isReg_p = (opertype == EXT_CORE_REGISTER
4277 || opertype == EXT_AUX_REGISTER) ? TRUE : FALSE;
4278
4279 /* 1st: get register name. */
4280 SKIP_WHITESPACE ();
4281 p = input_line_pointer;
4282 c = get_symbol_name (&p);
4283
4284 name = xstrdup (p);
4285 restore_line_pointer (c);
4286
4287 /* 2nd: get register number. */
4288 SKIP_WHITESPACE ();
4289
4290 if (*input_line_pointer != ',')
4291 {
4292 as_bad (_("expected comma after register name"));
4293 ignore_rest_of_line ();
4294 free (name);
4295 return;
4296 }
4297 input_line_pointer++;
4298 number = get_absolute_expression ();
4299
4300 if (number < 0)
4301 {
4302 as_bad (_("negative operand number %d"), number);
4303 ignore_rest_of_line ();
4304 free (name);
4305 return;
4306 }
4307
4308 if (isReg_p)
4309 {
4310 /* 3rd: get register mode. */
4311 SKIP_WHITESPACE ();
4312
4313 if (*input_line_pointer != ',')
4314 {
4315 as_bad (_("expected comma after register number"));
4316 ignore_rest_of_line ();
4317 free (name);
4318 return;
4319 }
4320
4321 input_line_pointer++;
4322 mode = input_line_pointer;
4323
4324 if (!strncmp (mode, "r|w", 3))
4325 {
4326 imode = 0;
4327 input_line_pointer += 3;
4328 }
4329 else if (!strncmp (mode, "r", 1))
4330 {
4331 imode = ARC_REGISTER_READONLY;
4332 input_line_pointer += 1;
4333 }
4334 else if (strncmp (mode, "w", 1))
4335 {
4336 as_bad (_("invalid mode"));
4337 ignore_rest_of_line ();
4338 free (name);
4339 return;
4340 }
4341 else
4342 {
4343 imode = ARC_REGISTER_WRITEONLY;
4344 input_line_pointer += 1;
4345 }
4346 }
4347
4348 if (isCore_p)
4349 {
4350 /* 4th: get core register shortcut. */
4351 SKIP_WHITESPACE ();
4352 if (*input_line_pointer != ',')
4353 {
4354 as_bad (_("expected comma after register mode"));
4355 ignore_rest_of_line ();
4356 free (name);
4357 return;
4358 }
4359
4360 input_line_pointer++;
4361
4362 if (!strncmp (input_line_pointer, "cannot_shortcut", 15))
4363 {
4364 imode |= ARC_REGISTER_NOSHORT_CUT;
4365 input_line_pointer += 15;
4366 }
4367 else if (strncmp (input_line_pointer, "can_shortcut", 12))
4368 {
4369 as_bad (_("shortcut designator invalid"));
4370 ignore_rest_of_line ();
4371 free (name);
4372 return;
4373 }
4374 else
4375 {
4376 input_line_pointer += 12;
4377 }
4378 }
4379 demand_empty_rest_of_line ();
4380
4381 ereg->name = name;
4382 ereg->number = number;
4383 ereg->imode = imode;
4384 }
4385
4386 /* Create an extension register/condition description in the arc
4387 extension section of the output file.
4388
4389 The structure for an instruction is like this:
4390 [0]: Length of the record.
4391 [1]: Type of the record.
4392
4393 For core regs and condition codes:
4394 [2]: Value.
4395 [3]+ Name.
4396
4397 For auxilirary registers:
4398 [2..5]: Value.
4399 [6]+ Name
4400
4401 The sequence is terminated by an empty entry. */
4402
4403 static void
4404 create_extcore_section (extRegister_t *ereg, int opertype)
4405 {
4406 segT old_sec = now_seg;
4407 int old_subsec = now_subseg;
4408 char *p;
4409 int name_len = strlen (ereg->name);
4410
4411 arc_set_ext_seg ();
4412
4413 switch (opertype)
4414 {
4415 case EXT_COND_CODE:
4416 case EXT_CORE_REGISTER:
4417 p = frag_more (1);
4418 *p = 3 + name_len + 1;
4419 p = frag_more (1);
4420 *p = opertype;
4421 p = frag_more (1);
4422 *p = ereg->number;
4423 break;
4424 case EXT_AUX_REGISTER:
4425 p = frag_more (1);
4426 *p = 6 + name_len + 1;
4427 p = frag_more (1);
4428 *p = EXT_AUX_REGISTER;
4429 p = frag_more (1);
4430 *p = (ereg->number >> 24) & 0xff;
4431 p = frag_more (1);
4432 *p = (ereg->number >> 16) & 0xff;
4433 p = frag_more (1);
4434 *p = (ereg->number >> 8) & 0xff;
4435 p = frag_more (1);
4436 *p = (ereg->number) & 0xff;
4437 break;
4438 default:
4439 break;
4440 }
4441
4442 p = frag_more (name_len + 1);
4443 strcpy (p, ereg->name);
4444
4445 subseg_set (old_sec, old_subsec);
4446 }
4447
4448 /* Handler .extCoreRegister pseudo-op. */
4449
4450 static void
4451 arc_extcorereg (int opertype)
4452 {
4453 extRegister_t ereg;
4454 struct arc_aux_reg *auxr;
4455 const char *retval;
4456 struct arc_flag_operand *ccode;
4457
4458 memset (&ereg, 0, sizeof (ereg));
4459 tokenize_extregister (&ereg, opertype);
4460
4461 switch (opertype)
4462 {
4463 case EXT_CORE_REGISTER:
4464 /* Core register. */
4465 if (ereg.number > 60)
4466 as_bad (_("core register %s value (%d) too large"), ereg.name,
4467 ereg.number);
4468 declare_register (ereg.name, ereg.number);
4469 break;
4470 case EXT_AUX_REGISTER:
4471 /* Auxiliary register. */
4472 auxr = xmalloc (sizeof (struct arc_aux_reg));
4473 auxr->name = ereg.name;
4474 auxr->cpu = arc_target;
4475 auxr->subclass = NONE;
4476 auxr->address = ereg.number;
4477 retval = hash_insert (arc_aux_hash, auxr->name, (void *) auxr);
4478 if (retval)
4479 as_fatal (_("internal error: can't hash aux register '%s': %s"),
4480 auxr->name, retval);
4481 break;
4482 case EXT_COND_CODE:
4483 /* Condition code. */
4484 if (ereg.number > 31)
4485 as_bad (_("condition code %s value (%d) too large"), ereg.name,
4486 ereg.number);
4487 ext_condcode.size ++;
4488 ext_condcode.arc_ext_condcode =
4489 xrealloc (ext_condcode.arc_ext_condcode,
4490 (ext_condcode.size + 1) * sizeof (struct arc_flag_operand));
4491 if (ext_condcode.arc_ext_condcode == NULL)
4492 as_fatal (_("Virtual memory exhausted"));
4493
4494 ccode = ext_condcode.arc_ext_condcode + ext_condcode.size - 1;
4495 ccode->name = ereg.name;
4496 ccode->code = ereg.number;
4497 ccode->bits = 5;
4498 ccode->shift = 0;
4499 ccode->favail = 0; /* not used. */
4500 ccode++;
4501 memset (ccode, 0, sizeof (struct arc_flag_operand));
4502 break;
4503 default:
4504 as_bad (_("Unknown extension"));
4505 break;
4506 }
4507 create_extcore_section (&ereg, opertype);
4508 }
4509
4510 /* Local variables:
4511 eval: (c-set-style "gnu")
4512 indent-tabs-mode: t
4513 End: */
GDB Binutils - Deliverables
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