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Fix BLX(1) for Thumb
[deliverable/binutils-gdb.git] / gas / config / tc-arm.c
1 /* tc-arm.c -- Assemble for the ARM
2 Copyright (C) 1994, 95, 96, 97, 98, 1999, 2000
3 Free Software Foundation, Inc.
4 Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
5 Modified by David Taylor (dtaylor@armltd.co.uk)
6
7 This file is part of GAS, the GNU Assembler.
8
9 GAS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
12 any later version.
13
14 GAS is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with GAS; see the file COPYING. If not, write to the Free
21 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 02111-1307, USA. */
23
24 #include <ctype.h>
25 #include <string.h>
26 #define NO_RELOC 0
27 #include "as.h"
28
29 /* Need TARGET_CPU. */
30 #include "config.h"
31 #include "subsegs.h"
32 #include "obstack.h"
33 #include "symbols.h"
34 #include "listing.h"
35
36 #ifdef OBJ_ELF
37 #include "elf/arm.h"
38 #include "dwarf2dbg.h"
39 #endif
40
41 /* Types of processor to assemble for. */
42 #define ARM_1 0x00000001
43 #define ARM_2 0x00000002
44 #define ARM_3 0x00000004
45 #define ARM_250 ARM_3
46 #define ARM_6 0x00000008
47 #define ARM_7 ARM_6 /* Same core instruction set. */
48 #define ARM_8 ARM_6 /* Same core instruction set. */
49 #define ARM_9 ARM_6 /* Same core instruction set. */
50 #define ARM_CPU_MASK 0x0000000f
51
52 /* The following bitmasks control CPU extensions (ARM7 onwards): */
53 #define ARM_EXT_LONGMUL 0x00000010 /* Allow long multiplies. */
54 #define ARM_EXT_HALFWORD 0x00000020 /* Allow half word loads. */
55 #define ARM_EXT_THUMB 0x00000040 /* Allow BX instruction. */
56 #define ARM_EXT_V5 0x00000080 /* Allow CLZ, etc. */
57 #define ARM_EXT_V5E 0x00000100 /* "El Segundo". */
58 #define ARM_EXT_XSCALE 0x00000200 /* Allow MIA etc. */
59
60 /* Architectures are the sum of the base and extensions. */
61 #define ARM_ARCH_V3M ARM_EXT_LONGMUL
62 #define ARM_ARCH_V4 (ARM_ARCH_V3M | ARM_EXT_HALFWORD)
63 #define ARM_ARCH_V4T (ARM_ARCH_V4 | ARM_EXT_THUMB)
64 #define ARM_ARCH_V5 (ARM_ARCH_V4 | ARM_EXT_V5)
65 #define ARM_ARCH_V5T (ARM_ARCH_V5 | ARM_EXT_THUMB)
66 #define ARM_ARCH_V5TE (ARM_ARCH_V5T | ARM_EXT_V5E)
67 #define ARM_ARCH_XSCALE (ARM_ARCH_V5TE | ARM_EXT_XSCALE)
68
69 /* Some useful combinations: */
70 #define ARM_ANY 0x00ffffff
71 #define ARM_2UP (ARM_ANY - ARM_1)
72 #define ARM_ALL ARM_2UP /* Not arm1 only. */
73 #define ARM_3UP 0x00fffffc
74 #define ARM_6UP 0x00fffff8 /* Includes ARM7. */
75
76 #define FPU_CORE 0x80000000
77 #define FPU_FPA10 0x40000000
78 #define FPU_FPA11 0x40000000
79 #define FPU_NONE 0
80
81 /* Some useful combinations. */
82 #define FPU_ALL 0xff000000 /* Note this is ~ARM_ANY. */
83 #define FPU_MEMMULTI 0x7f000000 /* Not fpu_core. */
84
85 #ifndef CPU_DEFAULT
86 #if defined __XSCALE__
87 #define CPU_DEFAULT (ARM_9 | ARM_ARCH_XSCALE)
88 #else
89 #if defined __thumb__
90 #define CPU_DEFAULT (ARM_7 | ARM_ARCH_V4T)
91 #else
92 #define CPU_DEFAULT ARM_ALL
93 #endif
94 #endif
95 #endif
96
97 #ifndef FPU_DEFAULT
98 #define FPU_DEFAULT FPU_ALL
99 #endif
100
101 #define streq(a, b) (strcmp (a, b) == 0)
102 #define skip_whitespace(str) while (*(str) == ' ') ++(str)
103
104 static unsigned long cpu_variant = CPU_DEFAULT | FPU_DEFAULT;
105 static int target_oabi = 0;
106
107 #if defined OBJ_COFF || defined OBJ_ELF
108 /* Flags stored in private area of BFD structure. */
109 static boolean uses_apcs_26 = false;
110 static boolean atpcs = false;
111 static boolean support_interwork = false;
112 static boolean uses_apcs_float = false;
113 static boolean pic_code = false;
114 #endif
115
116 /* This array holds the chars that always start a comment. If the
117 pre-processor is disabled, these aren't very useful. */
118 CONST char comment_chars[] = "@";
119
120 /* This array holds the chars that only start a comment at the beginning of
121 a line. If the line seems to have the form '# 123 filename'
122 .line and .file directives will appear in the pre-processed output. */
123 /* Note that input_file.c hand checks for '#' at the beginning of the
124 first line of the input file. This is because the compiler outputs
125 #NO_APP at the beginning of its output. */
126 /* Also note that comments like this one will always work. */
127 CONST char line_comment_chars[] = "#";
128
129 CONST char line_separator_chars[] = ";";
130
131 /* Chars that can be used to separate mant
132 from exp in floating point numbers. */
133 CONST char EXP_CHARS[] = "eE";
134
135 /* Chars that mean this number is a floating point constant. */
136 /* As in 0f12.456 */
137 /* or 0d1.2345e12 */
138
139 CONST char FLT_CHARS[] = "rRsSfFdDxXeEpP";
140
141 /* Prefix characters that indicate the start of an immediate
142 value. */
143 #define is_immediate_prefix(C) ((C) == '#' || (C) == '$')
144
145 #ifdef OBJ_ELF
146 /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */
147 symbolS * GOT_symbol;
148 #endif
149
150 /* Size of relocation record. */
151 CONST int md_reloc_size = 8;
152
153 /* 0: assemble for ARM,
154 1: assemble for Thumb,
155 2: assemble for Thumb even though target CPU does not support thumb
156 instructions. */
157 static int thumb_mode = 0;
158
159 typedef struct arm_fix
160 {
161 int thumb_mode;
162 } arm_fix_data;
163
164 struct arm_it
165 {
166 CONST char * error;
167 unsigned long instruction;
168 int suffix;
169 int size;
170 struct
171 {
172 bfd_reloc_code_real_type type;
173 expressionS exp;
174 int pc_rel;
175 } reloc;
176 };
177
178 struct arm_it inst;
179
180 enum asm_shift_index
181 {
182 SHIFT_LSL = 0,
183 SHIFT_LSR,
184 SHIFT_ASR,
185 SHIFT_ROR,
186 SHIFT_RRX
187 };
188
189 struct asm_shift_properties
190 {
191 enum asm_shift_index index;
192 unsigned long bit_field;
193 unsigned int allows_0 : 1;
194 unsigned int allows_32 : 1;
195 };
196
197 static const struct asm_shift_properties shift_properties [] =
198 {
199 { SHIFT_LSL, 0, 1, 0},
200 { SHIFT_LSR, 0x20, 0, 1},
201 { SHIFT_ASR, 0x40, 0, 1},
202 { SHIFT_ROR, 0x60, 0, 0},
203 { SHIFT_RRX, 0x60, 0, 0}
204 };
205
206 struct asm_shift_name
207 {
208 const char * name;
209 const struct asm_shift_properties * properties;
210 };
211
212 static const struct asm_shift_name shift_names [] =
213 {
214 { "asl", shift_properties + SHIFT_LSL },
215 { "lsl", shift_properties + SHIFT_LSL },
216 { "lsr", shift_properties + SHIFT_LSR },
217 { "asr", shift_properties + SHIFT_ASR },
218 { "ror", shift_properties + SHIFT_ROR },
219 { "rrx", shift_properties + SHIFT_RRX },
220 { "ASL", shift_properties + SHIFT_LSL },
221 { "LSL", shift_properties + SHIFT_LSL },
222 { "LSR", shift_properties + SHIFT_LSR },
223 { "ASR", shift_properties + SHIFT_ASR },
224 { "ROR", shift_properties + SHIFT_ROR },
225 { "RRX", shift_properties + SHIFT_RRX }
226 };
227
228 #define NO_SHIFT_RESTRICT 1
229 #define SHIFT_RESTRICT 0
230
231 #define NUM_FLOAT_VALS 8
232
233 CONST char * fp_const[] =
234 {
235 "0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0", 0
236 };
237
238 /* Number of littlenums required to hold an extended precision number. */
239 #define MAX_LITTLENUMS 6
240
241 LITTLENUM_TYPE fp_values[NUM_FLOAT_VALS][MAX_LITTLENUMS];
242
243 #define FAIL (-1)
244 #define SUCCESS (0)
245
246 #define SUFF_S 1
247 #define SUFF_D 2
248 #define SUFF_E 3
249 #define SUFF_P 4
250
251 #define CP_T_X 0x00008000
252 #define CP_T_Y 0x00400000
253 #define CP_T_Pre 0x01000000
254 #define CP_T_UD 0x00800000
255 #define CP_T_WB 0x00200000
256
257 #define CONDS_BIT 0x00100000
258 #define LOAD_BIT 0x00100000
259 #define TRANS_BIT 0x00200000
260
261 #define DOUBLE_LOAD_FLAG 0x00000001
262
263 struct asm_cond
264 {
265 CONST char * template;
266 unsigned long value;
267 };
268
269 /* This is to save a hash look-up in the common case. */
270 #define COND_ALWAYS 0xe0000000
271
272 static CONST struct asm_cond conds[] =
273 {
274 {"eq", 0x00000000},
275 {"ne", 0x10000000},
276 {"cs", 0x20000000}, {"hs", 0x20000000},
277 {"cc", 0x30000000}, {"ul", 0x30000000}, {"lo", 0x30000000},
278 {"mi", 0x40000000},
279 {"pl", 0x50000000},
280 {"vs", 0x60000000},
281 {"vc", 0x70000000},
282 {"hi", 0x80000000},
283 {"ls", 0x90000000},
284 {"ge", 0xa0000000},
285 {"lt", 0xb0000000},
286 {"gt", 0xc0000000},
287 {"le", 0xd0000000},
288 {"al", 0xe0000000},
289 {"nv", 0xf0000000}
290 };
291
292 /* Warning: If the top bit of the set_bits is set, then the standard
293 instruction bitmask is ignored, and the new bitmask is taken from
294 the set_bits: */
295 struct asm_flg
296 {
297 CONST char * template; /* Basic flag string. */
298 unsigned long set_bits; /* Bits to set. */
299 };
300
301 static CONST struct asm_flg s_flag[] =
302 {
303 {"s", CONDS_BIT},
304 {NULL, 0}
305 };
306
307 static CONST struct asm_flg ldr_flags[] =
308 {
309 {"d", DOUBLE_LOAD_FLAG},
310 {"b", 0x00400000},
311 {"t", TRANS_BIT},
312 {"bt", 0x00400000 | TRANS_BIT},
313 {"h", 0x801000b0},
314 {"sh", 0x801000f0},
315 {"sb", 0x801000d0},
316 {NULL, 0}
317 };
318
319 static CONST struct asm_flg str_flags[] =
320 {
321 {"d", DOUBLE_LOAD_FLAG},
322 {"b", 0x00400000},
323 {"t", TRANS_BIT},
324 {"bt", 0x00400000 | TRANS_BIT},
325 {"h", 0x800000b0},
326 {NULL, 0}
327 };
328
329 static CONST struct asm_flg byte_flag[] =
330 {
331 {"b", 0x00400000},
332 {NULL, 0}
333 };
334
335 static CONST struct asm_flg cmp_flags[] =
336 {
337 {"s", CONDS_BIT},
338 {"p", 0x0010f000},
339 {NULL, 0}
340 };
341
342 static CONST struct asm_flg ldm_flags[] =
343 {
344 {"ed", 0x01800000},
345 {"fd", 0x00800000},
346 {"ea", 0x01000000},
347 {"fa", 0x00000000},
348 {"ib", 0x01800000},
349 {"ia", 0x00800000},
350 {"db", 0x01000000},
351 {"da", 0x00000000},
352 {NULL, 0}
353 };
354
355 static CONST struct asm_flg stm_flags[] =
356 {
357 {"ed", 0x00000000},
358 {"fd", 0x01000000},
359 {"ea", 0x00800000},
360 {"fa", 0x01800000},
361 {"ib", 0x01800000},
362 {"ia", 0x00800000},
363 {"db", 0x01000000},
364 {"da", 0x00000000},
365 {NULL, 0}
366 };
367
368 static CONST struct asm_flg lfm_flags[] =
369 {
370 {"fd", 0x00800000},
371 {"ea", 0x01000000},
372 {NULL, 0}
373 };
374
375 static CONST struct asm_flg sfm_flags[] =
376 {
377 {"fd", 0x01000000},
378 {"ea", 0x00800000},
379 {NULL, 0}
380 };
381
382 static CONST struct asm_flg round_flags[] =
383 {
384 {"p", 0x00000020},
385 {"m", 0x00000040},
386 {"z", 0x00000060},
387 {NULL, 0}
388 };
389
390 /* The implementation of the FIX instruction is broken on some assemblers,
391 in that it accepts a precision specifier as well as a rounding specifier,
392 despite the fact that this is meaningless. To be more compatible, we
393 accept it as well, though of course it does not set any bits. */
394 static CONST struct asm_flg fix_flags[] =
395 {
396 {"p", 0x00000020},
397 {"m", 0x00000040},
398 {"z", 0x00000060},
399 {"sp", 0x00000020},
400 {"sm", 0x00000040},
401 {"sz", 0x00000060},
402 {"dp", 0x00000020},
403 {"dm", 0x00000040},
404 {"dz", 0x00000060},
405 {"ep", 0x00000020},
406 {"em", 0x00000040},
407 {"ez", 0x00000060},
408 {NULL, 0}
409 };
410
411 static CONST struct asm_flg except_flag[] =
412 {
413 {"e", 0x00400000},
414 {NULL, 0}
415 };
416
417 static CONST struct asm_flg cplong_flag[] =
418 {
419 {"l", 0x00400000},
420 {NULL, 0}
421 };
422
423 struct asm_psr
424 {
425 CONST char * template;
426 boolean cpsr;
427 unsigned long field;
428 };
429
430 /* The bit that distnguishes CPSR and SPSR. */
431 #define SPSR_BIT (1 << 22)
432
433 /* How many bits to shift the PSR_xxx bits up by. */
434 #define PSR_SHIFT 16
435
436 #define PSR_c (1 << 0)
437 #define PSR_x (1 << 1)
438 #define PSR_s (1 << 2)
439 #define PSR_f (1 << 3)
440
441 static CONST struct asm_psr psrs[] =
442 {
443 {"CPSR", true, PSR_c | PSR_f},
444 {"CPSR_all", true, PSR_c | PSR_f},
445 {"SPSR", false, PSR_c | PSR_f},
446 {"SPSR_all", false, PSR_c | PSR_f},
447 {"CPSR_flg", true, PSR_f},
448 {"CPSR_f", true, PSR_f},
449 {"SPSR_flg", false, PSR_f},
450 {"SPSR_f", false, PSR_f},
451 {"CPSR_c", true, PSR_c},
452 {"CPSR_ctl", true, PSR_c},
453 {"SPSR_c", false, PSR_c},
454 {"SPSR_ctl", false, PSR_c},
455 {"CPSR_x", true, PSR_x},
456 {"CPSR_s", true, PSR_s},
457 {"SPSR_x", false, PSR_x},
458 {"SPSR_s", false, PSR_s},
459 /* Combinations of flags. */
460 {"CPSR_fs", true, PSR_f | PSR_s},
461 {"CPSR_fx", true, PSR_f | PSR_x},
462 {"CPSR_fc", true, PSR_f | PSR_c},
463 {"CPSR_sf", true, PSR_s | PSR_f},
464 {"CPSR_sx", true, PSR_s | PSR_x},
465 {"CPSR_sc", true, PSR_s | PSR_c},
466 {"CPSR_xf", true, PSR_x | PSR_f},
467 {"CPSR_xs", true, PSR_x | PSR_s},
468 {"CPSR_xc", true, PSR_x | PSR_c},
469 {"CPSR_cf", true, PSR_c | PSR_f},
470 {"CPSR_cs", true, PSR_c | PSR_s},
471 {"CPSR_cx", true, PSR_c | PSR_x},
472 {"CPSR_fsx", true, PSR_f | PSR_s | PSR_x},
473 {"CPSR_fsc", true, PSR_f | PSR_s | PSR_c},
474 {"CPSR_fxs", true, PSR_f | PSR_x | PSR_s},
475 {"CPSR_fxc", true, PSR_f | PSR_x | PSR_c},
476 {"CPSR_fcs", true, PSR_f | PSR_c | PSR_s},
477 {"CPSR_fcx", true, PSR_f | PSR_c | PSR_x},
478 {"CPSR_sfx", true, PSR_s | PSR_f | PSR_x},
479 {"CPSR_sfc", true, PSR_s | PSR_f | PSR_c},
480 {"CPSR_sxf", true, PSR_s | PSR_x | PSR_f},
481 {"CPSR_sxc", true, PSR_s | PSR_x | PSR_c},
482 {"CPSR_scf", true, PSR_s | PSR_c | PSR_f},
483 {"CPSR_scx", true, PSR_s | PSR_c | PSR_x},
484 {"CPSR_xfs", true, PSR_x | PSR_f | PSR_s},
485 {"CPSR_xfc", true, PSR_x | PSR_f | PSR_c},
486 {"CPSR_xsf", true, PSR_x | PSR_s | PSR_f},
487 {"CPSR_xsc", true, PSR_x | PSR_s | PSR_c},
488 {"CPSR_xcf", true, PSR_x | PSR_c | PSR_f},
489 {"CPSR_xcs", true, PSR_x | PSR_c | PSR_s},
490 {"CPSR_cfs", true, PSR_c | PSR_f | PSR_s},
491 {"CPSR_cfx", true, PSR_c | PSR_f | PSR_x},
492 {"CPSR_csf", true, PSR_c | PSR_s | PSR_f},
493 {"CPSR_csx", true, PSR_c | PSR_s | PSR_x},
494 {"CPSR_cxf", true, PSR_c | PSR_x | PSR_f},
495 {"CPSR_cxs", true, PSR_c | PSR_x | PSR_s},
496 {"CPSR_fsxc", true, PSR_f | PSR_s | PSR_x | PSR_c},
497 {"CPSR_fscx", true, PSR_f | PSR_s | PSR_c | PSR_x},
498 {"CPSR_fxsc", true, PSR_f | PSR_x | PSR_s | PSR_c},
499 {"CPSR_fxcs", true, PSR_f | PSR_x | PSR_c | PSR_s},
500 {"CPSR_fcsx", true, PSR_f | PSR_c | PSR_s | PSR_x},
501 {"CPSR_fcxs", true, PSR_f | PSR_c | PSR_x | PSR_s},
502 {"CPSR_sfxc", true, PSR_s | PSR_f | PSR_x | PSR_c},
503 {"CPSR_sfcx", true, PSR_s | PSR_f | PSR_c | PSR_x},
504 {"CPSR_sxfc", true, PSR_s | PSR_x | PSR_f | PSR_c},
505 {"CPSR_sxcf", true, PSR_s | PSR_x | PSR_c | PSR_f},
506 {"CPSR_scfx", true, PSR_s | PSR_c | PSR_f | PSR_x},
507 {"CPSR_scxf", true, PSR_s | PSR_c | PSR_x | PSR_f},
508 {"CPSR_xfsc", true, PSR_x | PSR_f | PSR_s | PSR_c},
509 {"CPSR_xfcs", true, PSR_x | PSR_f | PSR_c | PSR_s},
510 {"CPSR_xsfc", true, PSR_x | PSR_s | PSR_f | PSR_c},
511 {"CPSR_xscf", true, PSR_x | PSR_s | PSR_c | PSR_f},
512 {"CPSR_xcfs", true, PSR_x | PSR_c | PSR_f | PSR_s},
513 {"CPSR_xcsf", true, PSR_x | PSR_c | PSR_s | PSR_f},
514 {"CPSR_cfsx", true, PSR_c | PSR_f | PSR_s | PSR_x},
515 {"CPSR_cfxs", true, PSR_c | PSR_f | PSR_x | PSR_s},
516 {"CPSR_csfx", true, PSR_c | PSR_s | PSR_f | PSR_x},
517 {"CPSR_csxf", true, PSR_c | PSR_s | PSR_x | PSR_f},
518 {"CPSR_cxfs", true, PSR_c | PSR_x | PSR_f | PSR_s},
519 {"CPSR_cxsf", true, PSR_c | PSR_x | PSR_s | PSR_f},
520 {"SPSR_fs", false, PSR_f | PSR_s},
521 {"SPSR_fx", false, PSR_f | PSR_x},
522 {"SPSR_fc", false, PSR_f | PSR_c},
523 {"SPSR_sf", false, PSR_s | PSR_f},
524 {"SPSR_sx", false, PSR_s | PSR_x},
525 {"SPSR_sc", false, PSR_s | PSR_c},
526 {"SPSR_xf", false, PSR_x | PSR_f},
527 {"SPSR_xs", false, PSR_x | PSR_s},
528 {"SPSR_xc", false, PSR_x | PSR_c},
529 {"SPSR_cf", false, PSR_c | PSR_f},
530 {"SPSR_cs", false, PSR_c | PSR_s},
531 {"SPSR_cx", false, PSR_c | PSR_x},
532 {"SPSR_fsx", false, PSR_f | PSR_s | PSR_x},
533 {"SPSR_fsc", false, PSR_f | PSR_s | PSR_c},
534 {"SPSR_fxs", false, PSR_f | PSR_x | PSR_s},
535 {"SPSR_fxc", false, PSR_f | PSR_x | PSR_c},
536 {"SPSR_fcs", false, PSR_f | PSR_c | PSR_s},
537 {"SPSR_fcx", false, PSR_f | PSR_c | PSR_x},
538 {"SPSR_sfx", false, PSR_s | PSR_f | PSR_x},
539 {"SPSR_sfc", false, PSR_s | PSR_f | PSR_c},
540 {"SPSR_sxf", false, PSR_s | PSR_x | PSR_f},
541 {"SPSR_sxc", false, PSR_s | PSR_x | PSR_c},
542 {"SPSR_scf", false, PSR_s | PSR_c | PSR_f},
543 {"SPSR_scx", false, PSR_s | PSR_c | PSR_x},
544 {"SPSR_xfs", false, PSR_x | PSR_f | PSR_s},
545 {"SPSR_xfc", false, PSR_x | PSR_f | PSR_c},
546 {"SPSR_xsf", false, PSR_x | PSR_s | PSR_f},
547 {"SPSR_xsc", false, PSR_x | PSR_s | PSR_c},
548 {"SPSR_xcf", false, PSR_x | PSR_c | PSR_f},
549 {"SPSR_xcs", false, PSR_x | PSR_c | PSR_s},
550 {"SPSR_cfs", false, PSR_c | PSR_f | PSR_s},
551 {"SPSR_cfx", false, PSR_c | PSR_f | PSR_x},
552 {"SPSR_csf", false, PSR_c | PSR_s | PSR_f},
553 {"SPSR_csx", false, PSR_c | PSR_s | PSR_x},
554 {"SPSR_cxf", false, PSR_c | PSR_x | PSR_f},
555 {"SPSR_cxs", false, PSR_c | PSR_x | PSR_s},
556 {"SPSR_fsxc", false, PSR_f | PSR_s | PSR_x | PSR_c},
557 {"SPSR_fscx", false, PSR_f | PSR_s | PSR_c | PSR_x},
558 {"SPSR_fxsc", false, PSR_f | PSR_x | PSR_s | PSR_c},
559 {"SPSR_fxcs", false, PSR_f | PSR_x | PSR_c | PSR_s},
560 {"SPSR_fcsx", false, PSR_f | PSR_c | PSR_s | PSR_x},
561 {"SPSR_fcxs", false, PSR_f | PSR_c | PSR_x | PSR_s},
562 {"SPSR_sfxc", false, PSR_s | PSR_f | PSR_x | PSR_c},
563 {"SPSR_sfcx", false, PSR_s | PSR_f | PSR_c | PSR_x},
564 {"SPSR_sxfc", false, PSR_s | PSR_x | PSR_f | PSR_c},
565 {"SPSR_sxcf", false, PSR_s | PSR_x | PSR_c | PSR_f},
566 {"SPSR_scfx", false, PSR_s | PSR_c | PSR_f | PSR_x},
567 {"SPSR_scxf", false, PSR_s | PSR_c | PSR_x | PSR_f},
568 {"SPSR_xfsc", false, PSR_x | PSR_f | PSR_s | PSR_c},
569 {"SPSR_xfcs", false, PSR_x | PSR_f | PSR_c | PSR_s},
570 {"SPSR_xsfc", false, PSR_x | PSR_s | PSR_f | PSR_c},
571 {"SPSR_xscf", false, PSR_x | PSR_s | PSR_c | PSR_f},
572 {"SPSR_xcfs", false, PSR_x | PSR_c | PSR_f | PSR_s},
573 {"SPSR_xcsf", false, PSR_x | PSR_c | PSR_s | PSR_f},
574 {"SPSR_cfsx", false, PSR_c | PSR_f | PSR_s | PSR_x},
575 {"SPSR_cfxs", false, PSR_c | PSR_f | PSR_x | PSR_s},
576 {"SPSR_csfx", false, PSR_c | PSR_s | PSR_f | PSR_x},
577 {"SPSR_csxf", false, PSR_c | PSR_s | PSR_x | PSR_f},
578 {"SPSR_cxfs", false, PSR_c | PSR_x | PSR_f | PSR_s},
579 {"SPSR_cxsf", false, PSR_c | PSR_x | PSR_s | PSR_f},
580 };
581
582 /* Functions called by parser. */
583 /* ARM instructions. */
584 static void do_arit PARAMS ((char *, unsigned long));
585 static void do_cmp PARAMS ((char *, unsigned long));
586 static void do_mov PARAMS ((char *, unsigned long));
587 static void do_ldst PARAMS ((char *, unsigned long));
588 static void do_ldmstm PARAMS ((char *, unsigned long));
589 static void do_branch PARAMS ((char *, unsigned long));
590 static void do_swi PARAMS ((char *, unsigned long));
591 /* Pseudo Op codes. */
592 static void do_adr PARAMS ((char *, unsigned long));
593 static void do_adrl PARAMS ((char *, unsigned long));
594 static void do_nop PARAMS ((char *, unsigned long));
595 /* ARM 2. */
596 static void do_mul PARAMS ((char *, unsigned long));
597 static void do_mla PARAMS ((char *, unsigned long));
598 /* ARM 3. */
599 static void do_swap PARAMS ((char *, unsigned long));
600 /* ARM 6. */
601 static void do_msr PARAMS ((char *, unsigned long));
602 static void do_mrs PARAMS ((char *, unsigned long));
603 /* ARM 7M. */
604 static void do_mull PARAMS ((char *, unsigned long));
605 /* ARM THUMB. */
606 static void do_bx PARAMS ((char *, unsigned long));
607
608 /* ARM_EXT_XScale. */
609 static void do_mia PARAMS ((char *, unsigned long));
610 static void do_mar PARAMS ((char *, unsigned long));
611 static void do_mra PARAMS ((char *, unsigned long));
612 static void do_pld PARAMS ((char *, unsigned long));
613 static void do_ldrd PARAMS ((char *, unsigned long));
614
615 /* ARM_EXT_V5. */
616 static void do_blx PARAMS ((char *, unsigned long));
617 static void do_bkpt PARAMS ((char *, unsigned long));
618 static void do_clz PARAMS ((char *, unsigned long));
619 static void do_lstc2 PARAMS ((char *, unsigned long));
620 static void do_cdp2 PARAMS ((char *, unsigned long));
621 static void do_co_reg2 PARAMS ((char *, unsigned long));
622
623 static void do_t_blx PARAMS ((char *));
624 static void do_t_bkpt PARAMS ((char *));
625
626 /* ARM_EXT_V5E. */
627 static void do_smla PARAMS ((char *, unsigned long));
628 static void do_smlal PARAMS ((char *, unsigned long));
629 static void do_smul PARAMS ((char *, unsigned long));
630 static void do_qadd PARAMS ((char *, unsigned long));
631 static void do_co_reg2c PARAMS ((char *, unsigned long));
632
633 /* Coprocessor Instructions. */
634 static void do_cdp PARAMS ((char *, unsigned long));
635 static void do_lstc PARAMS ((char *, unsigned long));
636 static void do_co_reg PARAMS ((char *, unsigned long));
637 static void do_fp_ctrl PARAMS ((char *, unsigned long));
638 static void do_fp_ldst PARAMS ((char *, unsigned long));
639 static void do_fp_ldmstm PARAMS ((char *, unsigned long));
640 static void do_fp_dyadic PARAMS ((char *, unsigned long));
641 static void do_fp_monadic PARAMS ((char *, unsigned long));
642 static void do_fp_cmp PARAMS ((char *, unsigned long));
643 static void do_fp_from_reg PARAMS ((char *, unsigned long));
644 static void do_fp_to_reg PARAMS ((char *, unsigned long));
645
646 static void fix_new_arm PARAMS ((fragS *, int, short, expressionS *, int, int));
647 static int arm_reg_parse PARAMS ((char **));
648 static CONST struct asm_psr * arm_psr_parse PARAMS ((char **));
649 static void symbol_locate PARAMS ((symbolS *, CONST char *, segT, valueT, fragS *));
650 static int add_to_lit_pool PARAMS ((void));
651 static unsigned validate_immediate PARAMS ((unsigned));
652 static unsigned validate_immediate_twopart PARAMS ((unsigned int, unsigned int *));
653 static int validate_offset_imm PARAMS ((unsigned int, int));
654 static void opcode_select PARAMS ((int));
655 static void end_of_line PARAMS ((char *));
656 static int reg_required_here PARAMS ((char **, int));
657 static int psr_required_here PARAMS ((char **));
658 static int co_proc_number PARAMS ((char **));
659 static int cp_opc_expr PARAMS ((char **, int, int));
660 static int cp_reg_required_here PARAMS ((char **, int));
661 static int fp_reg_required_here PARAMS ((char **, int));
662 static int cp_address_offset PARAMS ((char **));
663 static int cp_address_required_here PARAMS ((char **));
664 static int my_get_float_expression PARAMS ((char **));
665 static int skip_past_comma PARAMS ((char **));
666 static int walk_no_bignums PARAMS ((symbolS *));
667 static int negate_data_op PARAMS ((unsigned long *, unsigned long));
668 static int data_op2 PARAMS ((char **));
669 static int fp_op2 PARAMS ((char **));
670 static long reg_list PARAMS ((char **));
671 static void thumb_load_store PARAMS ((char *, int, int));
672 static int decode_shift PARAMS ((char **, int));
673 static int ldst_extend PARAMS ((char **, int));
674 static void thumb_add_sub PARAMS ((char *, int));
675 static void insert_reg PARAMS ((int));
676 static void thumb_shift PARAMS ((char *, int));
677 static void thumb_mov_compare PARAMS ((char *, int));
678 static void set_constant_flonums PARAMS ((void));
679 static valueT md_chars_to_number PARAMS ((char *, int));
680 static void insert_reg_alias PARAMS ((char *, int));
681 static void output_inst PARAMS ((void));
682 #ifdef OBJ_ELF
683 static bfd_reloc_code_real_type arm_parse_reloc PARAMS ((void));
684 #endif
685
686 /* ARM instructions take 4bytes in the object file, Thumb instructions
687 take 2: */
688 #define INSN_SIZE 4
689
690 /* LONGEST_INST is the longest basic instruction name without
691 conditions or flags. ARM7M has 4 of length 5. El Segundo
692 has one basic instruction name of length 7 (SMLALxy). */
693 #define LONGEST_INST 7
694
695 struct asm_opcode
696 {
697 /* Basic string to match. */
698 CONST char * template;
699
700 /* Basic instruction code. */
701 unsigned long value;
702
703 /* Compulsory suffix that must follow conds. If "", then the
704 instruction is not conditional and must have no suffix. */
705 CONST char * comp_suffix;
706
707 /* Bits to toggle if flag 'n' set. */
708 CONST struct asm_flg * flags;
709
710 /* Which CPU variants this exists for. */
711 unsigned long variants;
712
713 /* Function to call to parse args. */
714 void (* parms) PARAMS ((char *, unsigned long));
715 };
716
717 static CONST struct asm_opcode insns[] =
718 {
719 /* Intel XScale extensions to ARM V5 ISA. */
720 {"mia", 0x0e200010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
721 {"miaph", 0x0e280010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
722 {"miabb", 0x0e2c0010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
723 {"miabt", 0x0e2d0010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
724 {"miatb", 0x0e2e0010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
725 {"miatt", 0x0e2f0010, NULL, NULL, ARM_EXT_XSCALE, do_mia},
726 {"mar", 0x0c400000, NULL, NULL, ARM_EXT_XSCALE, do_mar},
727 {"mra", 0x0c500000, NULL, NULL, ARM_EXT_XSCALE, do_mra},
728 {"pld", 0xf450f000, "", NULL, ARM_EXT_XSCALE, do_pld},
729 {"ldr", 0x000000d0, NULL, ldr_flags, ARM_ANY, do_ldrd},
730 {"str", 0x000000f0, NULL, str_flags, ARM_ANY, do_ldrd},
731
732 /* ARM Instructions. */
733 {"and", 0x00000000, NULL, s_flag, ARM_ANY, do_arit},
734 {"eor", 0x00200000, NULL, s_flag, ARM_ANY, do_arit},
735 {"sub", 0x00400000, NULL, s_flag, ARM_ANY, do_arit},
736 {"rsb", 0x00600000, NULL, s_flag, ARM_ANY, do_arit},
737 {"add", 0x00800000, NULL, s_flag, ARM_ANY, do_arit},
738 {"adc", 0x00a00000, NULL, s_flag, ARM_ANY, do_arit},
739 {"sbc", 0x00c00000, NULL, s_flag, ARM_ANY, do_arit},
740 {"rsc", 0x00e00000, NULL, s_flag, ARM_ANY, do_arit},
741 {"orr", 0x01800000, NULL, s_flag, ARM_ANY, do_arit},
742 {"bic", 0x01c00000, NULL, s_flag, ARM_ANY, do_arit},
743 {"tst", 0x01000000, NULL, cmp_flags, ARM_ANY, do_cmp},
744 {"teq", 0x01200000, NULL, cmp_flags, ARM_ANY, do_cmp},
745 {"cmp", 0x01400000, NULL, cmp_flags, ARM_ANY, do_cmp},
746 {"cmn", 0x01600000, NULL, cmp_flags, ARM_ANY, do_cmp},
747 {"mov", 0x01a00000, NULL, s_flag, ARM_ANY, do_mov},
748 {"mvn", 0x01e00000, NULL, s_flag, ARM_ANY, do_mov},
749 {"str", 0x04000000, NULL, str_flags, ARM_ANY, do_ldst},
750 {"ldr", 0x04100000, NULL, ldr_flags, ARM_ANY, do_ldst},
751 {"stm", 0x08000000, NULL, stm_flags, ARM_ANY, do_ldmstm},
752 {"ldm", 0x08100000, NULL, ldm_flags, ARM_ANY, do_ldmstm},
753 {"swi", 0x0f000000, NULL, NULL, ARM_ANY, do_swi},
754 #ifdef TE_WINCE
755 {"bl", 0x0b000000, NULL, NULL, ARM_ANY, do_branch},
756 {"b", 0x0a000000, NULL, NULL, ARM_ANY, do_branch},
757 #else
758 {"bl", 0x0bfffffe, NULL, NULL, ARM_ANY, do_branch},
759 {"b", 0x0afffffe, NULL, NULL, ARM_ANY, do_branch},
760 #endif
761
762 /* Pseudo ops. */
763 {"adr", 0x028f0000, NULL, NULL, ARM_ANY, do_adr},
764 {"adrl", 0x028f0000, NULL, NULL, ARM_ANY, do_adrl},
765 {"nop", 0x01a00000, NULL, NULL, ARM_ANY, do_nop},
766
767 /* ARM 2 multiplies. */
768 {"mul", 0x00000090, NULL, s_flag, ARM_2UP, do_mul},
769 {"mla", 0x00200090, NULL, s_flag, ARM_2UP, do_mla},
770
771 /* ARM 3 - swp instructions. */
772 {"swp", 0x01000090, NULL, byte_flag, ARM_3UP, do_swap},
773
774 /* ARM 6 Coprocessor instructions. */
775 {"mrs", 0x010f0000, NULL, NULL, ARM_6UP, do_mrs},
776 {"msr", 0x0120f000, NULL, NULL, ARM_6UP, do_msr},
777 /* ScottB: our code uses 0x0128f000 for msr.
778 NickC: but this is wrong because the bits 16 through 19 are
779 handled by the PSR_xxx defines above. */
780
781 /* ARM 7M long multiplies - need signed/unsigned flags! */
782 {"smull", 0x00c00090, NULL, s_flag, ARM_EXT_LONGMUL, do_mull},
783 {"umull", 0x00800090, NULL, s_flag, ARM_EXT_LONGMUL, do_mull},
784 {"smlal", 0x00e00090, NULL, s_flag, ARM_EXT_LONGMUL, do_mull},
785 {"umlal", 0x00a00090, NULL, s_flag, ARM_EXT_LONGMUL, do_mull},
786
787 /* ARM THUMB interworking. */
788 {"bx", 0x012fff10, NULL, NULL, ARM_EXT_THUMB, do_bx},
789
790 /* Floating point instructions. */
791 {"wfs", 0x0e200110, NULL, NULL, FPU_ALL, do_fp_ctrl},
792 {"rfs", 0x0e300110, NULL, NULL, FPU_ALL, do_fp_ctrl},
793 {"wfc", 0x0e400110, NULL, NULL, FPU_ALL, do_fp_ctrl},
794 {"rfc", 0x0e500110, NULL, NULL, FPU_ALL, do_fp_ctrl},
795 {"ldf", 0x0c100100, "sdep", NULL, FPU_ALL, do_fp_ldst},
796 {"stf", 0x0c000100, "sdep", NULL, FPU_ALL, do_fp_ldst},
797 {"lfm", 0x0c100200, NULL, lfm_flags, FPU_MEMMULTI, do_fp_ldmstm},
798 {"sfm", 0x0c000200, NULL, sfm_flags, FPU_MEMMULTI, do_fp_ldmstm},
799 {"mvf", 0x0e008100, "sde", round_flags, FPU_ALL, do_fp_monadic},
800 {"mnf", 0x0e108100, "sde", round_flags, FPU_ALL, do_fp_monadic},
801 {"abs", 0x0e208100, "sde", round_flags, FPU_ALL, do_fp_monadic},
802 {"rnd", 0x0e308100, "sde", round_flags, FPU_ALL, do_fp_monadic},
803 {"sqt", 0x0e408100, "sde", round_flags, FPU_ALL, do_fp_monadic},
804 {"log", 0x0e508100, "sde", round_flags, FPU_ALL, do_fp_monadic},
805 {"lgn", 0x0e608100, "sde", round_flags, FPU_ALL, do_fp_monadic},
806 {"exp", 0x0e708100, "sde", round_flags, FPU_ALL, do_fp_monadic},
807 {"sin", 0x0e808100, "sde", round_flags, FPU_ALL, do_fp_monadic},
808 {"cos", 0x0e908100, "sde", round_flags, FPU_ALL, do_fp_monadic},
809 {"tan", 0x0ea08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
810 {"asn", 0x0eb08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
811 {"acs", 0x0ec08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
812 {"atn", 0x0ed08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
813 {"urd", 0x0ee08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
814 {"nrm", 0x0ef08100, "sde", round_flags, FPU_ALL, do_fp_monadic},
815 {"adf", 0x0e000100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
816 {"suf", 0x0e200100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
817 {"rsf", 0x0e300100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
818 {"muf", 0x0e100100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
819 {"dvf", 0x0e400100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
820 {"rdf", 0x0e500100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
821 {"pow", 0x0e600100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
822 {"rpw", 0x0e700100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
823 {"rmf", 0x0e800100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
824 {"fml", 0x0e900100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
825 {"fdv", 0x0ea00100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
826 {"frd", 0x0eb00100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
827 {"pol", 0x0ec00100, "sde", round_flags, FPU_ALL, do_fp_dyadic},
828 {"cmf", 0x0e90f110, NULL, except_flag, FPU_ALL, do_fp_cmp},
829 {"cnf", 0x0eb0f110, NULL, except_flag, FPU_ALL, do_fp_cmp},
830 /* The FPA10 data sheet suggests that the 'E' of cmfe/cnfe should not
831 be an optional suffix, but part of the instruction. To be compatible,
832 we accept either. */
833 {"cmfe", 0x0ed0f110, NULL, NULL, FPU_ALL, do_fp_cmp},
834 {"cnfe", 0x0ef0f110, NULL, NULL, FPU_ALL, do_fp_cmp},
835 {"flt", 0x0e000110, "sde", round_flags, FPU_ALL, do_fp_from_reg},
836 {"fix", 0x0e100110, NULL, fix_flags, FPU_ALL, do_fp_to_reg},
837
838 /* Generic copressor instructions. */
839 {"cdp", 0x0e000000, NULL, NULL, ARM_2UP, do_cdp},
840 {"ldc", 0x0c100000, NULL, cplong_flag, ARM_2UP, do_lstc},
841 {"stc", 0x0c000000, NULL, cplong_flag, ARM_2UP, do_lstc},
842 {"mcr", 0x0e000010, NULL, NULL, ARM_2UP, do_co_reg},
843 {"mrc", 0x0e100010, NULL, NULL, ARM_2UP, do_co_reg},
844
845 /* ARM ISA extension 5. */
846 /* Note: blx is actually 2 opcodes, so the .value is set dynamically.
847 And it's sometimes conditional and sometimes not. */
848 {"blx", 0, NULL, NULL, ARM_EXT_V5, do_blx},
849 {"clz", 0x016f0f10, NULL, NULL, ARM_EXT_V5, do_clz},
850 {"bkpt", 0xe1200070, "", NULL, ARM_EXT_V5, do_bkpt},
851 {"ldc2", 0xfc100000, "", cplong_flag, ARM_EXT_V5, do_lstc2},
852 {"stc2", 0xfc000000, "", cplong_flag, ARM_EXT_V5, do_lstc2},
853 {"cdp2", 0xfe000000, "", NULL, ARM_EXT_V5, do_cdp2},
854 {"mcr2", 0xfe000010, "", NULL, ARM_EXT_V5, do_co_reg2},
855 {"mrc2", 0xfe100010, "", NULL, ARM_EXT_V5, do_co_reg2},
856
857 /* ARM ISA extension 5E, El Segundo. */
858 {"smlabb", 0x01000080, NULL, NULL, ARM_EXT_V5E, do_smla},
859 {"smlatb", 0x010000a0, NULL, NULL, ARM_EXT_V5E, do_smla},
860 {"smlabt", 0x010000c0, NULL, NULL, ARM_EXT_V5E, do_smla},
861 {"smlatt", 0x010000e0, NULL, NULL, ARM_EXT_V5E, do_smla},
862
863 {"smlawb", 0x01200080, NULL, NULL, ARM_EXT_V5E, do_smla},
864 {"smlawt", 0x012000c0, NULL, NULL, ARM_EXT_V5E, do_smla},
865
866 {"smlalbb",0x01400080, NULL, NULL, ARM_EXT_V5E, do_smlal},
867 {"smlaltb",0x014000a0, NULL, NULL, ARM_EXT_V5E, do_smlal},
868 {"smlalbt",0x014000c0, NULL, NULL, ARM_EXT_V5E, do_smlal},
869 {"smlaltt",0x014000e0, NULL, NULL, ARM_EXT_V5E, do_smlal},
870
871 {"smulbb", 0x01600080, NULL, NULL, ARM_EXT_V5E, do_smul},
872 {"smultb", 0x016000a0, NULL, NULL, ARM_EXT_V5E, do_smul},
873 {"smulbt", 0x016000c0, NULL, NULL, ARM_EXT_V5E, do_smul},
874 {"smultt", 0x016000e0, NULL, NULL, ARM_EXT_V5E, do_smul},
875
876 {"smulwb", 0x012000a0, NULL, NULL, ARM_EXT_V5E, do_smul},
877 {"smulwt", 0x012000e0, NULL, NULL, ARM_EXT_V5E, do_smul},
878
879 {"qadd", 0x01000050, NULL, NULL, ARM_EXT_V5E, do_qadd},
880 {"qdadd", 0x01400050, NULL, NULL, ARM_EXT_V5E, do_qadd},
881 {"qsub", 0x01200050, NULL, NULL, ARM_EXT_V5E, do_qadd},
882 {"qdsub", 0x01600050, NULL, NULL, ARM_EXT_V5E, do_qadd},
883
884 {"mcrr", 0x0c400000, NULL, NULL, ARM_EXT_V5E, do_co_reg2c},
885 {"mrrc", 0x0c500000, NULL, NULL, ARM_EXT_V5E, do_co_reg2c},
886 };
887
888 /* Defines for various bits that we will want to toggle. */
889 #define INST_IMMEDIATE 0x02000000
890 #define OFFSET_REG 0x02000000
891 #define HWOFFSET_IMM 0x00400000
892 #define SHIFT_BY_REG 0x00000010
893 #define PRE_INDEX 0x01000000
894 #define INDEX_UP 0x00800000
895 #define WRITE_BACK 0x00200000
896 #define LDM_TYPE_2_OR_3 0x00400000
897
898 #define LITERAL_MASK 0xf000f000
899 #define COND_MASK 0xf0000000
900 #define OPCODE_MASK 0xfe1fffff
901 #define DATA_OP_SHIFT 21
902
903 /* Codes to distinguish the arithmetic instructions. */
904 #define OPCODE_AND 0
905 #define OPCODE_EOR 1
906 #define OPCODE_SUB 2
907 #define OPCODE_RSB 3
908 #define OPCODE_ADD 4
909 #define OPCODE_ADC 5
910 #define OPCODE_SBC 6
911 #define OPCODE_RSC 7
912 #define OPCODE_TST 8
913 #define OPCODE_TEQ 9
914 #define OPCODE_CMP 10
915 #define OPCODE_CMN 11
916 #define OPCODE_ORR 12
917 #define OPCODE_MOV 13
918 #define OPCODE_BIC 14
919 #define OPCODE_MVN 15
920
921 static void do_t_nop PARAMS ((char *));
922 static void do_t_arit PARAMS ((char *));
923 static void do_t_add PARAMS ((char *));
924 static void do_t_asr PARAMS ((char *));
925 static void do_t_branch9 PARAMS ((char *));
926 static void do_t_branch12 PARAMS ((char *));
927 static void do_t_branch23 PARAMS ((char *));
928 static void do_t_bx PARAMS ((char *));
929 static void do_t_compare PARAMS ((char *));
930 static void do_t_ldmstm PARAMS ((char *));
931 static void do_t_ldr PARAMS ((char *));
932 static void do_t_ldrb PARAMS ((char *));
933 static void do_t_ldrh PARAMS ((char *));
934 static void do_t_lds PARAMS ((char *));
935 static void do_t_lsl PARAMS ((char *));
936 static void do_t_lsr PARAMS ((char *));
937 static void do_t_mov PARAMS ((char *));
938 static void do_t_push_pop PARAMS ((char *));
939 static void do_t_str PARAMS ((char *));
940 static void do_t_strb PARAMS ((char *));
941 static void do_t_strh PARAMS ((char *));
942 static void do_t_sub PARAMS ((char *));
943 static void do_t_swi PARAMS ((char *));
944 static void do_t_adr PARAMS ((char *));
945
946 #define T_OPCODE_MUL 0x4340
947 #define T_OPCODE_TST 0x4200
948 #define T_OPCODE_CMN 0x42c0
949 #define T_OPCODE_NEG 0x4240
950 #define T_OPCODE_MVN 0x43c0
951
952 #define T_OPCODE_ADD_R3 0x1800
953 #define T_OPCODE_SUB_R3 0x1a00
954 #define T_OPCODE_ADD_HI 0x4400
955 #define T_OPCODE_ADD_ST 0xb000
956 #define T_OPCODE_SUB_ST 0xb080
957 #define T_OPCODE_ADD_SP 0xa800
958 #define T_OPCODE_ADD_PC 0xa000
959 #define T_OPCODE_ADD_I8 0x3000
960 #define T_OPCODE_SUB_I8 0x3800
961 #define T_OPCODE_ADD_I3 0x1c00
962 #define T_OPCODE_SUB_I3 0x1e00
963
964 #define T_OPCODE_ASR_R 0x4100
965 #define T_OPCODE_LSL_R 0x4080
966 #define T_OPCODE_LSR_R 0x40c0
967 #define T_OPCODE_ASR_I 0x1000
968 #define T_OPCODE_LSL_I 0x0000
969 #define T_OPCODE_LSR_I 0x0800
970
971 #define T_OPCODE_MOV_I8 0x2000
972 #define T_OPCODE_CMP_I8 0x2800
973 #define T_OPCODE_CMP_LR 0x4280
974 #define T_OPCODE_MOV_HR 0x4600
975 #define T_OPCODE_CMP_HR 0x4500
976
977 #define T_OPCODE_LDR_PC 0x4800
978 #define T_OPCODE_LDR_SP 0x9800
979 #define T_OPCODE_STR_SP 0x9000
980 #define T_OPCODE_LDR_IW 0x6800
981 #define T_OPCODE_STR_IW 0x6000
982 #define T_OPCODE_LDR_IH 0x8800
983 #define T_OPCODE_STR_IH 0x8000
984 #define T_OPCODE_LDR_IB 0x7800
985 #define T_OPCODE_STR_IB 0x7000
986 #define T_OPCODE_LDR_RW 0x5800
987 #define T_OPCODE_STR_RW 0x5000
988 #define T_OPCODE_LDR_RH 0x5a00
989 #define T_OPCODE_STR_RH 0x5200
990 #define T_OPCODE_LDR_RB 0x5c00
991 #define T_OPCODE_STR_RB 0x5400
992
993 #define T_OPCODE_PUSH 0xb400
994 #define T_OPCODE_POP 0xbc00
995
996 #define T_OPCODE_BRANCH 0xe7fe
997
998 static int thumb_reg PARAMS ((char ** str, int hi_lo));
999
1000 #define THUMB_SIZE 2 /* Size of thumb instruction. */
1001 #define THUMB_REG_LO 0x1
1002 #define THUMB_REG_HI 0x2
1003 #define THUMB_REG_ANY 0x3
1004
1005 #define THUMB_H1 0x0080
1006 #define THUMB_H2 0x0040
1007
1008 #define THUMB_ASR 0
1009 #define THUMB_LSL 1
1010 #define THUMB_LSR 2
1011
1012 #define THUMB_MOVE 0
1013 #define THUMB_COMPARE 1
1014
1015 #define THUMB_LOAD 0
1016 #define THUMB_STORE 1
1017
1018 #define THUMB_PP_PC_LR 0x0100
1019
1020 /* These three are used for immediate shifts, do not alter. */
1021 #define THUMB_WORD 2
1022 #define THUMB_HALFWORD 1
1023 #define THUMB_BYTE 0
1024
1025 struct thumb_opcode
1026 {
1027 /* Basic string to match. */
1028 CONST char * template;
1029
1030 /* Basic instruction code. */
1031 unsigned long value;
1032
1033 int size;
1034
1035 /* Which CPU variants this exists for. */
1036 unsigned long variants;
1037
1038 /* Function to call to parse args. */
1039 void (* parms) PARAMS ((char *));
1040 };
1041
1042 static CONST struct thumb_opcode tinsns[] =
1043 {
1044 {"adc", 0x4140, 2, ARM_EXT_THUMB, do_t_arit},
1045 {"add", 0x0000, 2, ARM_EXT_THUMB, do_t_add},
1046 {"and", 0x4000, 2, ARM_EXT_THUMB, do_t_arit},
1047 {"asr", 0x0000, 2, ARM_EXT_THUMB, do_t_asr},
1048 {"b", T_OPCODE_BRANCH, 2, ARM_EXT_THUMB, do_t_branch12},
1049 {"beq", 0xd0fe, 2, ARM_EXT_THUMB, do_t_branch9},
1050 {"bne", 0xd1fe, 2, ARM_EXT_THUMB, do_t_branch9},
1051 {"bcs", 0xd2fe, 2, ARM_EXT_THUMB, do_t_branch9},
1052 {"bhs", 0xd2fe, 2, ARM_EXT_THUMB, do_t_branch9},
1053 {"bcc", 0xd3fe, 2, ARM_EXT_THUMB, do_t_branch9},
1054 {"bul", 0xd3fe, 2, ARM_EXT_THUMB, do_t_branch9},
1055 {"blo", 0xd3fe, 2, ARM_EXT_THUMB, do_t_branch9},
1056 {"bmi", 0xd4fe, 2, ARM_EXT_THUMB, do_t_branch9},
1057 {"bpl", 0xd5fe, 2, ARM_EXT_THUMB, do_t_branch9},
1058 {"bvs", 0xd6fe, 2, ARM_EXT_THUMB, do_t_branch9},
1059 {"bvc", 0xd7fe, 2, ARM_EXT_THUMB, do_t_branch9},
1060 {"bhi", 0xd8fe, 2, ARM_EXT_THUMB, do_t_branch9},
1061 {"bls", 0xd9fe, 2, ARM_EXT_THUMB, do_t_branch9},
1062 {"bge", 0xdafe, 2, ARM_EXT_THUMB, do_t_branch9},
1063 {"blt", 0xdbfe, 2, ARM_EXT_THUMB, do_t_branch9},
1064 {"bgt", 0xdcfe, 2, ARM_EXT_THUMB, do_t_branch9},
1065 {"ble", 0xddfe, 2, ARM_EXT_THUMB, do_t_branch9},
1066 {"bal", 0xdefe, 2, ARM_EXT_THUMB, do_t_branch9},
1067 {"bic", 0x4380, 2, ARM_EXT_THUMB, do_t_arit},
1068 {"bl", 0xf7fffffe, 4, ARM_EXT_THUMB, do_t_branch23},
1069 {"blx", 0, 0, ARM_EXT_V5, do_t_blx},
1070 {"bkpt", 0xbe00, 2, ARM_EXT_V5, do_t_bkpt},
1071 {"bx", 0x4700, 2, ARM_EXT_THUMB, do_t_bx},
1072 {"cmn", T_OPCODE_CMN, 2, ARM_EXT_THUMB, do_t_arit},
1073 {"cmp", 0x0000, 2, ARM_EXT_THUMB, do_t_compare},
1074 {"eor", 0x4040, 2, ARM_EXT_THUMB, do_t_arit},
1075 {"ldmia", 0xc800, 2, ARM_EXT_THUMB, do_t_ldmstm},
1076 {"ldr", 0x0000, 2, ARM_EXT_THUMB, do_t_ldr},
1077 {"ldrb", 0x0000, 2, ARM_EXT_THUMB, do_t_ldrb},
1078 {"ldrh", 0x0000, 2, ARM_EXT_THUMB, do_t_ldrh},
1079 {"ldrsb", 0x5600, 2, ARM_EXT_THUMB, do_t_lds},
1080 {"ldrsh", 0x5e00, 2, ARM_EXT_THUMB, do_t_lds},
1081 {"ldsb", 0x5600, 2, ARM_EXT_THUMB, do_t_lds},
1082 {"ldsh", 0x5e00, 2, ARM_EXT_THUMB, do_t_lds},
1083 {"lsl", 0x0000, 2, ARM_EXT_THUMB, do_t_lsl},
1084 {"lsr", 0x0000, 2, ARM_EXT_THUMB, do_t_lsr},
1085 {"mov", 0x0000, 2, ARM_EXT_THUMB, do_t_mov},
1086 {"mul", T_OPCODE_MUL, 2, ARM_EXT_THUMB, do_t_arit},
1087 {"mvn", T_OPCODE_MVN, 2, ARM_EXT_THUMB, do_t_arit},
1088 {"neg", T_OPCODE_NEG, 2, ARM_EXT_THUMB, do_t_arit},
1089 {"orr", 0x4300, 2, ARM_EXT_THUMB, do_t_arit},
1090 {"pop", 0xbc00, 2, ARM_EXT_THUMB, do_t_push_pop},
1091 {"push", 0xb400, 2, ARM_EXT_THUMB, do_t_push_pop},
1092 {"ror", 0x41c0, 2, ARM_EXT_THUMB, do_t_arit},
1093 {"sbc", 0x4180, 2, ARM_EXT_THUMB, do_t_arit},
1094 {"stmia", 0xc000, 2, ARM_EXT_THUMB, do_t_ldmstm},
1095 {"str", 0x0000, 2, ARM_EXT_THUMB, do_t_str},
1096 {"strb", 0x0000, 2, ARM_EXT_THUMB, do_t_strb},
1097 {"strh", 0x0000, 2, ARM_EXT_THUMB, do_t_strh},
1098 {"swi", 0xdf00, 2, ARM_EXT_THUMB, do_t_swi},
1099 {"sub", 0x0000, 2, ARM_EXT_THUMB, do_t_sub},
1100 {"tst", T_OPCODE_TST, 2, ARM_EXT_THUMB, do_t_arit},
1101 /* Pseudo ops: */
1102 {"adr", 0x0000, 2, ARM_EXT_THUMB, do_t_adr},
1103 {"nop", 0x46C0, 2, ARM_EXT_THUMB, do_t_nop}, /* mov r8,r8 */
1104 };
1105
1106 struct reg_entry
1107 {
1108 CONST char * name;
1109 int number;
1110 };
1111
1112 #define int_register(reg) ((reg) >= 0 && (reg) <= 15)
1113 #define cp_register(reg) ((reg) >= 32 && (reg) <= 47)
1114 #define fp_register(reg) ((reg) >= 16 && (reg) <= 23)
1115
1116 #define REG_PC 15
1117 #define REG_LR 14
1118 #define REG_SP 13
1119
1120 /* These are the standard names. Users can add aliases with .req. */
1121 static CONST struct reg_entry reg_table[] =
1122 {
1123 /* Processor Register Numbers. */
1124 {"r0", 0}, {"r1", 1}, {"r2", 2}, {"r3", 3},
1125 {"r4", 4}, {"r5", 5}, {"r6", 6}, {"r7", 7},
1126 {"r8", 8}, {"r9", 9}, {"r10", 10}, {"r11", 11},
1127 {"r12", 12}, {"r13", REG_SP},{"r14", REG_LR},{"r15", REG_PC},
1128 /* APCS conventions. */
1129 {"a1", 0}, {"a2", 1}, {"a3", 2}, {"a4", 3},
1130 {"v1", 4}, {"v2", 5}, {"v3", 6}, {"v4", 7}, {"v5", 8},
1131 {"v6", 9}, {"sb", 9}, {"v7", 10}, {"sl", 10},
1132 {"fp", 11}, {"ip", 12}, {"sp", REG_SP},{"lr", REG_LR},{"pc", REG_PC},
1133 /* ATPCS additions to APCS conventions. */
1134 {"wr", 7}, {"v8", 11},
1135 /* FP Registers. */
1136 {"f0", 16}, {"f1", 17}, {"f2", 18}, {"f3", 19},
1137 {"f4", 20}, {"f5", 21}, {"f6", 22}, {"f7", 23},
1138 {"c0", 32}, {"c1", 33}, {"c2", 34}, {"c3", 35},
1139 {"c4", 36}, {"c5", 37}, {"c6", 38}, {"c7", 39},
1140 {"c8", 40}, {"c9", 41}, {"c10", 42}, {"c11", 43},
1141 {"c12", 44}, {"c13", 45}, {"c14", 46}, {"c15", 47},
1142 {"cr0", 32}, {"cr1", 33}, {"cr2", 34}, {"cr3", 35},
1143 {"cr4", 36}, {"cr5", 37}, {"cr6", 38}, {"cr7", 39},
1144 {"cr8", 40}, {"cr9", 41}, {"cr10", 42}, {"cr11", 43},
1145 {"cr12", 44}, {"cr13", 45}, {"cr14", 46}, {"cr15", 47},
1146 /* ATPCS additions to float register names. */
1147 {"s0",16}, {"s1",17}, {"s2",18}, {"s3",19},
1148 {"s4",20}, {"s5",21}, {"s6",22}, {"s7",23},
1149 {"d0",16}, {"d1",17}, {"d2",18}, {"d3",19},
1150 {"d4",20}, {"d5",21}, {"d6",22}, {"d7",23},
1151 /* FIXME: At some point we need to add VFP register names. */
1152 /* Array terminator. */
1153 {NULL, 0}
1154 };
1155
1156 #define BAD_ARGS _("Bad arguments to instruction")
1157 #define BAD_PC _("r15 not allowed here")
1158 #define BAD_FLAGS _("Instruction should not have flags")
1159 #define BAD_COND _("Instruction is not conditional")
1160 #define ERR_NO_ACCUM _("acc0 expected")
1161
1162 static struct hash_control * arm_ops_hsh = NULL;
1163 static struct hash_control * arm_tops_hsh = NULL;
1164 static struct hash_control * arm_cond_hsh = NULL;
1165 static struct hash_control * arm_shift_hsh = NULL;
1166 static struct hash_control * arm_reg_hsh = NULL;
1167 static struct hash_control * arm_psr_hsh = NULL;
1168
1169 /* This table describes all the machine specific pseudo-ops the assembler
1170 has to support. The fields are:
1171 pseudo-op name without dot
1172 function to call to execute this pseudo-op
1173 Integer arg to pass to the function. */
1174
1175 static void s_req PARAMS ((int));
1176 static void s_align PARAMS ((int));
1177 static void s_bss PARAMS ((int));
1178 static void s_even PARAMS ((int));
1179 static void s_ltorg PARAMS ((int));
1180 static void s_arm PARAMS ((int));
1181 static void s_thumb PARAMS ((int));
1182 static void s_code PARAMS ((int));
1183 static void s_force_thumb PARAMS ((int));
1184 static void s_thumb_func PARAMS ((int));
1185 static void s_thumb_set PARAMS ((int));
1186 static void arm_s_text PARAMS ((int));
1187 static void arm_s_data PARAMS ((int));
1188 #ifdef OBJ_ELF
1189 static void arm_s_section PARAMS ((int));
1190 static void s_arm_elf_cons PARAMS ((int));
1191 #endif
1192
1193 static int my_get_expression PARAMS ((expressionS *, char **));
1194
1195 CONST pseudo_typeS md_pseudo_table[] =
1196 {
1197 /* Never called becasue '.req' does not start line. */
1198 { "req", s_req, 0 },
1199 { "bss", s_bss, 0 },
1200 { "align", s_align, 0 },
1201 { "arm", s_arm, 0 },
1202 { "thumb", s_thumb, 0 },
1203 { "code", s_code, 0 },
1204 { "force_thumb", s_force_thumb, 0 },
1205 { "thumb_func", s_thumb_func, 0 },
1206 { "thumb_set", s_thumb_set, 0 },
1207 { "even", s_even, 0 },
1208 { "ltorg", s_ltorg, 0 },
1209 { "pool", s_ltorg, 0 },
1210 /* Allow for the effect of section changes. */
1211 { "text", arm_s_text, 0 },
1212 { "data", arm_s_data, 0 },
1213 #ifdef OBJ_ELF
1214 { "section", arm_s_section, 0 },
1215 { "section.s", arm_s_section, 0 },
1216 { "sect", arm_s_section, 0 },
1217 { "sect.s", arm_s_section, 0 },
1218 { "word", s_arm_elf_cons, 4 },
1219 { "long", s_arm_elf_cons, 4 },
1220 { "file", dwarf2_directive_file, 0 },
1221 { "loc", dwarf2_directive_loc, 0 },
1222 #else
1223 { "word", cons, 4},
1224 #endif
1225 { "extend", float_cons, 'x' },
1226 { "ldouble", float_cons, 'x' },
1227 { "packed", float_cons, 'p' },
1228 { 0, 0, 0 }
1229 };
1230
1231 /* Stuff needed to resolve the label ambiguity
1232 As:
1233 ...
1234 label: <insn>
1235 may differ from:
1236 ...
1237 label:
1238 <insn>
1239 */
1240
1241 symbolS * last_label_seen;
1242 static int label_is_thumb_function_name = false;
1243
1244 /* Literal stuff. */
1245
1246 #define MAX_LITERAL_POOL_SIZE 1024
1247
1248 typedef struct literalS
1249 {
1250 struct expressionS exp;
1251 struct arm_it * inst;
1252 } literalT;
1253
1254 literalT literals[MAX_LITERAL_POOL_SIZE];
1255
1256 /* Next free entry in the pool. */
1257 int next_literal_pool_place = 0;
1258
1259 /* Next literal pool number. */
1260 int lit_pool_num = 1;
1261
1262 symbolS * current_poolP = NULL;
1263
1264 static int
1265 add_to_lit_pool ()
1266 {
1267 int lit_count = 0;
1268
1269 if (current_poolP == NULL)
1270 current_poolP = symbol_create (FAKE_LABEL_NAME, undefined_section,
1271 (valueT) 0, &zero_address_frag);
1272
1273 /* Check if this literal value is already in the pool: */
1274 while (lit_count < next_literal_pool_place)
1275 {
1276 if (literals[lit_count].exp.X_op == inst.reloc.exp.X_op
1277 && inst.reloc.exp.X_op == O_constant
1278 && (literals[lit_count].exp.X_add_number
1279 == inst.reloc.exp.X_add_number)
1280 && literals[lit_count].exp.X_unsigned == inst.reloc.exp.X_unsigned)
1281 break;
1282 lit_count++;
1283 }
1284
1285 if (lit_count == next_literal_pool_place) /* New entry. */
1286 {
1287 if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE)
1288 {
1289 inst.error = _("Literal Pool Overflow");
1290 return FAIL;
1291 }
1292
1293 literals[next_literal_pool_place].exp = inst.reloc.exp;
1294 lit_count = next_literal_pool_place++;
1295 }
1296
1297 inst.reloc.exp.X_op = O_symbol;
1298 inst.reloc.exp.X_add_number = (lit_count) * 4 - 8;
1299 inst.reloc.exp.X_add_symbol = current_poolP;
1300
1301 return SUCCESS;
1302 }
1303
1304 /* Can't use symbol_new here, so have to create a symbol and then at
1305 a later date assign it a value. Thats what these functions do. */
1306
1307 static void
1308 symbol_locate (symbolP, name, segment, valu, frag)
1309 symbolS * symbolP;
1310 CONST char * name; /* It is copied, the caller can modify. */
1311 segT segment; /* Segment identifier (SEG_<something>). */
1312 valueT valu; /* Symbol value. */
1313 fragS * frag; /* Associated fragment. */
1314 {
1315 unsigned int name_length;
1316 char * preserved_copy_of_name;
1317
1318 name_length = strlen (name) + 1; /* +1 for \0. */
1319 obstack_grow (&notes, name, name_length);
1320 preserved_copy_of_name = obstack_finish (&notes);
1321 #ifdef STRIP_UNDERSCORE
1322 if (preserved_copy_of_name[0] == '_')
1323 preserved_copy_of_name++;
1324 #endif
1325
1326 #ifdef tc_canonicalize_symbol_name
1327 preserved_copy_of_name =
1328 tc_canonicalize_symbol_name (preserved_copy_of_name);
1329 #endif
1330
1331 S_SET_NAME (symbolP, preserved_copy_of_name);
1332
1333 S_SET_SEGMENT (symbolP, segment);
1334 S_SET_VALUE (symbolP, valu);
1335 symbol_clear_list_pointers(symbolP);
1336
1337 symbol_set_frag (symbolP, frag);
1338
1339 /* Link to end of symbol chain. */
1340 {
1341 extern int symbol_table_frozen;
1342 if (symbol_table_frozen)
1343 abort ();
1344 }
1345
1346 symbol_append (symbolP, symbol_lastP, & symbol_rootP, & symbol_lastP);
1347
1348 obj_symbol_new_hook (symbolP);
1349
1350 #ifdef tc_symbol_new_hook
1351 tc_symbol_new_hook (symbolP);
1352 #endif
1353
1354 #ifdef DEBUG_SYMS
1355 verify_symbol_chain (symbol_rootP, symbol_lastP);
1356 #endif /* DEBUG_SYMS */
1357 }
1358
1359 /* Check that an immediate is valid.
1360 If so, convert it to the right format. */
1361
1362 static unsigned int
1363 validate_immediate (val)
1364 unsigned int val;
1365 {
1366 unsigned int a;
1367 unsigned int i;
1368
1369 #define rotate_left(v, n) (v << n | v >> (32 - n))
1370
1371 for (i = 0; i < 32; i += 2)
1372 if ((a = rotate_left (val, i)) <= 0xff)
1373 return a | (i << 7); /* 12-bit pack: [shift-cnt,const]. */
1374
1375 return FAIL;
1376 }
1377
1378 /* Check to see if an immediate can be computed as two seperate immediate
1379 values, added together. We already know that this value cannot be
1380 computed by just one ARM instruction. */
1381
1382 static unsigned int
1383 validate_immediate_twopart (val, highpart)
1384 unsigned int val;
1385 unsigned int * highpart;
1386 {
1387 unsigned int a;
1388 unsigned int i;
1389
1390 for (i = 0; i < 32; i += 2)
1391 if (((a = rotate_left (val, i)) & 0xff) != 0)
1392 {
1393 if (a & 0xff00)
1394 {
1395 if (a & ~ 0xffff)
1396 continue;
1397 * highpart = (a >> 8) | ((i + 24) << 7);
1398 }
1399 else if (a & 0xff0000)
1400 {
1401 if (a & 0xff000000)
1402 continue;
1403 * highpart = (a >> 16) | ((i + 16) << 7);
1404 }
1405 else
1406 {
1407 assert (a & 0xff000000);
1408 * highpart = (a >> 24) | ((i + 8) << 7);
1409 }
1410
1411 return (a & 0xff) | (i << 7);
1412 }
1413
1414 return FAIL;
1415 }
1416
1417 static int
1418 validate_offset_imm (val, hwse)
1419 unsigned int val;
1420 int hwse;
1421 {
1422 if ((hwse && val > 255) || val > 4095)
1423 return FAIL;
1424 return val;
1425 }
1426
1427 static void
1428 s_req (a)
1429 int a ATTRIBUTE_UNUSED;
1430 {
1431 as_bad (_("Invalid syntax for .req directive."));
1432 }
1433
1434 static void
1435 s_bss (ignore)
1436 int ignore ATTRIBUTE_UNUSED;
1437 {
1438 /* We don't support putting frags in the BSS segment, we fake it by
1439 marking in_bss, then looking at s_skip for clues. */
1440 subseg_set (bss_section, 0);
1441 demand_empty_rest_of_line ();
1442 }
1443
1444 static void
1445 s_even (ignore)
1446 int ignore ATTRIBUTE_UNUSED;
1447 {
1448 /* Never make frag if expect extra pass. */
1449 if (!need_pass_2)
1450 frag_align (1, 0, 0);
1451
1452 record_alignment (now_seg, 1);
1453
1454 demand_empty_rest_of_line ();
1455 }
1456
1457 static void
1458 s_ltorg (ignored)
1459 int ignored ATTRIBUTE_UNUSED;
1460 {
1461 int lit_count = 0;
1462 char sym_name[20];
1463
1464 if (current_poolP == NULL)
1465 return;
1466
1467 /* Align pool as you have word accesses.
1468 Only make a frag if we have to. */
1469 if (!need_pass_2)
1470 frag_align (2, 0, 0);
1471
1472 record_alignment (now_seg, 2);
1473
1474 sprintf (sym_name, "$$lit_\002%x", lit_pool_num++);
1475
1476 symbol_locate (current_poolP, sym_name, now_seg,
1477 (valueT) frag_now_fix (), frag_now);
1478 symbol_table_insert (current_poolP);
1479
1480 ARM_SET_THUMB (current_poolP, thumb_mode);
1481
1482 #if defined OBJ_COFF || defined OBJ_ELF
1483 ARM_SET_INTERWORK (current_poolP, support_interwork);
1484 #endif
1485
1486 while (lit_count < next_literal_pool_place)
1487 /* First output the expression in the instruction to the pool. */
1488 emit_expr (&(literals[lit_count++].exp), 4); /* .word */
1489
1490 next_literal_pool_place = 0;
1491 current_poolP = NULL;
1492 }
1493
1494 /* Same as s_align_ptwo but align 0 => align 2. */
1495
1496 static void
1497 s_align (unused)
1498 int unused ATTRIBUTE_UNUSED;
1499 {
1500 register int temp;
1501 register long temp_fill;
1502 long max_alignment = 15;
1503
1504 temp = get_absolute_expression ();
1505 if (temp > max_alignment)
1506 as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment);
1507 else if (temp < 0)
1508 {
1509 as_bad (_("Alignment negative. 0 assumed."));
1510 temp = 0;
1511 }
1512
1513 if (*input_line_pointer == ',')
1514 {
1515 input_line_pointer++;
1516 temp_fill = get_absolute_expression ();
1517 }
1518 else
1519 temp_fill = 0;
1520
1521 if (!temp)
1522 temp = 2;
1523
1524 /* Only make a frag if we HAVE to. */
1525 if (temp && !need_pass_2)
1526 frag_align (temp, (int) temp_fill, 0);
1527 demand_empty_rest_of_line ();
1528
1529 record_alignment (now_seg, temp);
1530 }
1531
1532 static void
1533 s_force_thumb (ignore)
1534 int ignore ATTRIBUTE_UNUSED;
1535 {
1536 /* If we are not already in thumb mode go into it, EVEN if
1537 the target processor does not support thumb instructions.
1538 This is used by gcc/config/arm/lib1funcs.asm for example
1539 to compile interworking support functions even if the
1540 target processor should not support interworking. */
1541 if (! thumb_mode)
1542 {
1543 thumb_mode = 2;
1544
1545 record_alignment (now_seg, 1);
1546 }
1547
1548 demand_empty_rest_of_line ();
1549 }
1550
1551 static void
1552 s_thumb_func (ignore)
1553 int ignore ATTRIBUTE_UNUSED;
1554 {
1555 if (! thumb_mode)
1556 opcode_select (16);
1557
1558 /* The following label is the name/address of the start of a Thumb function.
1559 We need to know this for the interworking support. */
1560 label_is_thumb_function_name = true;
1561
1562 demand_empty_rest_of_line ();
1563 }
1564
1565 /* Perform a .set directive, but also mark the alias as
1566 being a thumb function. */
1567
1568 static void
1569 s_thumb_set (equiv)
1570 int equiv;
1571 {
1572 /* XXX the following is a duplicate of the code for s_set() in read.c
1573 We cannot just call that code as we need to get at the symbol that
1574 is created. */
1575 register char * name;
1576 register char delim;
1577 register char * end_name;
1578 register symbolS * symbolP;
1579
1580 /* Especial apologies for the random logic:
1581 This just grew, and could be parsed much more simply!
1582 Dean - in haste. */
1583 name = input_line_pointer;
1584 delim = get_symbol_end ();
1585 end_name = input_line_pointer;
1586 *end_name = delim;
1587
1588 SKIP_WHITESPACE ();
1589
1590 if (*input_line_pointer != ',')
1591 {
1592 *end_name = 0;
1593 as_bad (_("Expected comma after name \"%s\""), name);
1594 *end_name = delim;
1595 ignore_rest_of_line ();
1596 return;
1597 }
1598
1599 input_line_pointer++;
1600 *end_name = 0;
1601
1602 if (name[0] == '.' && name[1] == '\0')
1603 {
1604 /* XXX - this should not happen to .thumb_set. */
1605 abort ();
1606 }
1607
1608 if ((symbolP = symbol_find (name)) == NULL
1609 && (symbolP = md_undefined_symbol (name)) == NULL)
1610 {
1611 #ifndef NO_LISTING
1612 /* When doing symbol listings, play games with dummy fragments living
1613 outside the normal fragment chain to record the file and line info
1614 for this symbol. */
1615 if (listing & LISTING_SYMBOLS)
1616 {
1617 extern struct list_info_struct * listing_tail;
1618 fragS * dummy_frag = (fragS *) xmalloc (sizeof (fragS));
1619
1620 memset (dummy_frag, 0, sizeof (fragS));
1621 dummy_frag->fr_type = rs_fill;
1622 dummy_frag->line = listing_tail;
1623 symbolP = symbol_new (name, undefined_section, 0, dummy_frag);
1624 dummy_frag->fr_symbol = symbolP;
1625 }
1626 else
1627 #endif
1628 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
1629
1630 #ifdef OBJ_COFF
1631 /* "set" symbols are local unless otherwise specified. */
1632 SF_SET_LOCAL (symbolP);
1633 #endif /* OBJ_COFF */
1634 } /* Make a new symbol. */
1635
1636 symbol_table_insert (symbolP);
1637
1638 * end_name = delim;
1639
1640 if (equiv
1641 && S_IS_DEFINED (symbolP)
1642 && S_GET_SEGMENT (symbolP) != reg_section)
1643 as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
1644
1645 pseudo_set (symbolP);
1646
1647 demand_empty_rest_of_line ();
1648
1649 /* XXX Now we come to the Thumb specific bit of code. */
1650
1651 THUMB_SET_FUNC (symbolP, 1);
1652 ARM_SET_THUMB (symbolP, 1);
1653 #if defined OBJ_ELF || defined OBJ_COFF
1654 ARM_SET_INTERWORK (symbolP, support_interwork);
1655 #endif
1656 }
1657
1658 /* If we change section we must dump the literal pool first. */
1659
1660 static void
1661 arm_s_text (ignore)
1662 int ignore;
1663 {
1664 if (now_seg != text_section)
1665 s_ltorg (0);
1666
1667 #ifdef OBJ_ELF
1668 obj_elf_text (ignore);
1669 #else
1670 s_text (ignore);
1671 #endif
1672 }
1673
1674 static void
1675 arm_s_data (ignore)
1676 int ignore;
1677 {
1678 if (flag_readonly_data_in_text)
1679 {
1680 if (now_seg != text_section)
1681 s_ltorg (0);
1682 }
1683 else if (now_seg != data_section)
1684 s_ltorg (0);
1685
1686 #ifdef OBJ_ELF
1687 obj_elf_data (ignore);
1688 #else
1689 s_data (ignore);
1690 #endif
1691 }
1692
1693 #ifdef OBJ_ELF
1694 static void
1695 arm_s_section (ignore)
1696 int ignore;
1697 {
1698 s_ltorg (0);
1699
1700 obj_elf_section (ignore);
1701 }
1702 #endif
1703
1704 static void
1705 opcode_select (width)
1706 int width;
1707 {
1708 switch (width)
1709 {
1710 case 16:
1711 if (! thumb_mode)
1712 {
1713 if (! (cpu_variant & ARM_EXT_THUMB))
1714 as_bad (_("selected processor does not support THUMB opcodes"));
1715
1716 thumb_mode = 1;
1717 /* No need to force the alignment, since we will have been
1718 coming from ARM mode, which is word-aligned. */
1719 record_alignment (now_seg, 1);
1720 }
1721 break;
1722
1723 case 32:
1724 if (thumb_mode)
1725 {
1726 if ((cpu_variant & ARM_ANY) == ARM_EXT_THUMB)
1727 as_bad (_("selected processor does not support ARM opcodes"));
1728
1729 thumb_mode = 0;
1730
1731 if (!need_pass_2)
1732 frag_align (2, 0, 0);
1733
1734 record_alignment (now_seg, 1);
1735 }
1736 break;
1737
1738 default:
1739 as_bad (_("invalid instruction size selected (%d)"), width);
1740 }
1741 }
1742
1743 static void
1744 s_arm (ignore)
1745 int ignore ATTRIBUTE_UNUSED;
1746 {
1747 opcode_select (32);
1748 demand_empty_rest_of_line ();
1749 }
1750
1751 static void
1752 s_thumb (ignore)
1753 int ignore ATTRIBUTE_UNUSED;
1754 {
1755 opcode_select (16);
1756 demand_empty_rest_of_line ();
1757 }
1758
1759 static void
1760 s_code (unused)
1761 int unused ATTRIBUTE_UNUSED;
1762 {
1763 register int temp;
1764
1765 temp = get_absolute_expression ();
1766 switch (temp)
1767 {
1768 case 16:
1769 case 32:
1770 opcode_select (temp);
1771 break;
1772
1773 default:
1774 as_bad (_("invalid operand to .code directive (%d) (expecting 16 or 32)"), temp);
1775 }
1776 }
1777
1778 static void
1779 end_of_line (str)
1780 char * str;
1781 {
1782 skip_whitespace (str);
1783
1784 if (* str != '\0')
1785 inst.error = _("Garbage following instruction");
1786 }
1787
1788 static int
1789 skip_past_comma (str)
1790 char ** str;
1791 {
1792 char * p = * str, c;
1793 int comma = 0;
1794
1795 while ((c = *p) == ' ' || c == ',')
1796 {
1797 p++;
1798 if (c == ',' && comma++)
1799 return FAIL;
1800 }
1801
1802 if (c == '\0')
1803 return FAIL;
1804
1805 *str = p;
1806 return comma ? SUCCESS : FAIL;
1807 }
1808
1809 /* A standard register must be given at this point.
1810 SHIFT is the place to put it in inst.instruction.
1811 Restores input start point on error.
1812 Returns the reg#, or FAIL. */
1813
1814 static int
1815 reg_required_here (str, shift)
1816 char ** str;
1817 int shift;
1818 {
1819 static char buff [128]; /* XXX */
1820 int reg;
1821 char * start = * str;
1822
1823 if ((reg = arm_reg_parse (str)) != FAIL && int_register (reg))
1824 {
1825 if (shift >= 0)
1826 inst.instruction |= reg << shift;
1827 return reg;
1828 }
1829
1830 /* Restore the start point, we may have got a reg of the wrong class. */
1831 *str = start;
1832
1833 /* In the few cases where we might be able to accept something else
1834 this error can be overridden. */
1835 sprintf (buff, _("Register expected, not '%.100s'"), start);
1836 inst.error = buff;
1837
1838 return FAIL;
1839 }
1840
1841 static CONST struct asm_psr *
1842 arm_psr_parse (ccp)
1843 register char ** ccp;
1844 {
1845 char * start = * ccp;
1846 char c;
1847 char * p;
1848 CONST struct asm_psr * psr;
1849
1850 p = start;
1851
1852 /* Skip to the end of the next word in the input stream. */
1853 do
1854 {
1855 c = *p++;
1856 }
1857 while (isalpha (c) || c == '_');
1858
1859 /* Terminate the word. */
1860 *--p = 0;
1861
1862 /* CPSR's and SPSR's can now be lowercase. This is just a convenience
1863 feature for ease of use and backwards compatibility. */
1864 if (!strncmp (start, "cpsr", 4))
1865 strncpy (start, "CPSR", 4);
1866 else if (!strncmp (start, "spsr", 4))
1867 strncpy (start, "SPSR", 4);
1868
1869 /* Now locate the word in the psr hash table. */
1870 psr = (CONST struct asm_psr *) hash_find (arm_psr_hsh, start);
1871
1872 /* Restore the input stream. */
1873 *p = c;
1874
1875 /* If we found a valid match, advance the
1876 stream pointer past the end of the word. */
1877 *ccp = p;
1878
1879 return psr;
1880 }
1881
1882 /* Parse the input looking for a PSR flag. */
1883
1884 static int
1885 psr_required_here (str)
1886 char ** str;
1887 {
1888 char * start = * str;
1889 CONST struct asm_psr * psr;
1890
1891 psr = arm_psr_parse (str);
1892
1893 if (psr)
1894 {
1895 /* If this is the SPSR that is being modified, set the R bit. */
1896 if (! psr->cpsr)
1897 inst.instruction |= SPSR_BIT;
1898
1899 /* Set the psr flags in the MSR instruction. */
1900 inst.instruction |= psr->field << PSR_SHIFT;
1901
1902 return SUCCESS;
1903 }
1904
1905 /* In the few cases where we might be able to accept
1906 something else this error can be overridden. */
1907 inst.error = _("flag for {c}psr instruction expected");
1908
1909 /* Restore the start point. */
1910 *str = start;
1911 return FAIL;
1912 }
1913
1914 static int
1915 co_proc_number (str)
1916 char ** str;
1917 {
1918 int processor, pchar;
1919
1920 skip_whitespace (* str);
1921
1922 /* The data sheet seems to imply that just a number on its own is valid
1923 here, but the RISC iX assembler seems to accept a prefix 'p'. We will
1924 accept either. */
1925 if (**str == 'p' || **str == 'P')
1926 (*str)++;
1927
1928 pchar = *(*str)++;
1929 if (pchar >= '0' && pchar <= '9')
1930 {
1931 processor = pchar - '0';
1932 if (**str >= '0' && **str <= '9')
1933 {
1934 processor = processor * 10 + *(*str)++ - '0';
1935 if (processor > 15)
1936 {
1937 inst.error = _("Illegal co-processor number");
1938 return FAIL;
1939 }
1940 }
1941 }
1942 else
1943 {
1944 inst.error = _("Bad or missing co-processor number");
1945 return FAIL;
1946 }
1947
1948 inst.instruction |= processor << 8;
1949 return SUCCESS;
1950 }
1951
1952 static int
1953 cp_opc_expr (str, where, length)
1954 char ** str;
1955 int where;
1956 int length;
1957 {
1958 expressionS expr;
1959
1960 skip_whitespace (* str);
1961
1962 memset (&expr, '\0', sizeof (expr));
1963
1964 if (my_get_expression (&expr, str))
1965 return FAIL;
1966 if (expr.X_op != O_constant)
1967 {
1968 inst.error = _("bad or missing expression");
1969 return FAIL;
1970 }
1971
1972 if ((expr.X_add_number & ((1 << length) - 1)) != expr.X_add_number)
1973 {
1974 inst.error = _("immediate co-processor expression too large");
1975 return FAIL;
1976 }
1977
1978 inst.instruction |= expr.X_add_number << where;
1979 return SUCCESS;
1980 }
1981
1982 static int
1983 cp_reg_required_here (str, where)
1984 char ** str;
1985 int where;
1986 {
1987 int reg;
1988 char * start = *str;
1989
1990 if ((reg = arm_reg_parse (str)) != FAIL && cp_register (reg))
1991 {
1992 reg &= 15;
1993 inst.instruction |= reg << where;
1994 return reg;
1995 }
1996
1997 /* In the few cases where we might be able to accept something else
1998 this error can be overridden. */
1999 inst.error = _("Co-processor register expected");
2000
2001 /* Restore the start point. */
2002 *str = start;
2003 return FAIL;
2004 }
2005
2006 static int
2007 fp_reg_required_here (str, where)
2008 char ** str;
2009 int where;
2010 {
2011 int reg;
2012 char * start = * str;
2013
2014 if ((reg = arm_reg_parse (str)) != FAIL && fp_register (reg))
2015 {
2016 reg &= 7;
2017 inst.instruction |= reg << where;
2018 return reg;
2019 }
2020
2021 /* In the few cases where we might be able to accept something else
2022 this error can be overridden. */
2023 inst.error = _("Floating point register expected");
2024
2025 /* Restore the start point. */
2026 *str = start;
2027 return FAIL;
2028 }
2029
2030 static int
2031 cp_address_offset (str)
2032 char ** str;
2033 {
2034 int offset;
2035
2036 skip_whitespace (* str);
2037
2038 if (! is_immediate_prefix (**str))
2039 {
2040 inst.error = _("immediate expression expected");
2041 return FAIL;
2042 }
2043
2044 (*str)++;
2045
2046 if (my_get_expression (& inst.reloc.exp, str))
2047 return FAIL;
2048
2049 if (inst.reloc.exp.X_op == O_constant)
2050 {
2051 offset = inst.reloc.exp.X_add_number;
2052
2053 if (offset & 3)
2054 {
2055 inst.error = _("co-processor address must be word aligned");
2056 return FAIL;
2057 }
2058
2059 if (offset > 1023 || offset < -1023)
2060 {
2061 inst.error = _("offset too large");
2062 return FAIL;
2063 }
2064
2065 if (offset >= 0)
2066 inst.instruction |= INDEX_UP;
2067 else
2068 offset = -offset;
2069
2070 inst.instruction |= offset >> 2;
2071 }
2072 else
2073 inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM;
2074
2075 return SUCCESS;
2076 }
2077
2078 static int
2079 cp_address_required_here (str)
2080 char ** str;
2081 {
2082 char * p = * str;
2083 int pre_inc = 0;
2084 int write_back = 0;
2085
2086 if (*p == '[')
2087 {
2088 int reg;
2089
2090 p++;
2091 skip_whitespace (p);
2092
2093 if ((reg = reg_required_here (& p, 16)) == FAIL)
2094 return FAIL;
2095
2096 skip_whitespace (p);
2097
2098 if (*p == ']')
2099 {
2100 p++;
2101
2102 if (skip_past_comma (& p) == SUCCESS)
2103 {
2104 /* [Rn], #expr */
2105 write_back = WRITE_BACK;
2106
2107 if (reg == REG_PC)
2108 {
2109 inst.error = _("pc may not be used in post-increment");
2110 return FAIL;
2111 }
2112
2113 if (cp_address_offset (& p) == FAIL)
2114 return FAIL;
2115 }
2116 else
2117 pre_inc = PRE_INDEX | INDEX_UP;
2118 }
2119 else
2120 {
2121 /* '['Rn, #expr']'[!] */
2122
2123 if (skip_past_comma (& p) == FAIL)
2124 {
2125 inst.error = _("pre-indexed expression expected");
2126 return FAIL;
2127 }
2128
2129 pre_inc = PRE_INDEX;
2130
2131 if (cp_address_offset (& p) == FAIL)
2132 return FAIL;
2133
2134 skip_whitespace (p);
2135
2136 if (*p++ != ']')
2137 {
2138 inst.error = _("missing ]");
2139 return FAIL;
2140 }
2141
2142 skip_whitespace (p);
2143
2144 if (*p == '!')
2145 {
2146 if (reg == REG_PC)
2147 {
2148 inst.error = _("pc may not be used with write-back");
2149 return FAIL;
2150 }
2151
2152 p++;
2153 write_back = WRITE_BACK;
2154 }
2155 }
2156 }
2157 else
2158 {
2159 if (my_get_expression (&inst.reloc.exp, &p))
2160 return FAIL;
2161
2162 inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM;
2163 inst.reloc.exp.X_add_number -= 8; /* PC rel adjust. */
2164 inst.reloc.pc_rel = 1;
2165 inst.instruction |= (REG_PC << 16);
2166 pre_inc = PRE_INDEX;
2167 }
2168
2169 inst.instruction |= write_back | pre_inc;
2170 *str = p;
2171 return SUCCESS;
2172 }
2173
2174 static void
2175 do_nop (str, flags)
2176 char * str;
2177 unsigned long flags;
2178 {
2179 /* Do nothing really. */
2180 inst.instruction |= flags; /* This is pointless. */
2181 end_of_line (str);
2182 return;
2183 }
2184
2185 static void
2186 do_mrs (str, flags)
2187 char *str;
2188 unsigned long flags;
2189 {
2190 int skip = 0;
2191
2192 /* Only one syntax. */
2193 skip_whitespace (str);
2194
2195 if (reg_required_here (&str, 12) == FAIL)
2196 {
2197 inst.error = BAD_ARGS;
2198 return;
2199 }
2200
2201 if (skip_past_comma (&str) == FAIL)
2202 {
2203 inst.error = _("comma expected after register name");
2204 return;
2205 }
2206
2207 skip_whitespace (str);
2208
2209 if ( strcmp (str, "CPSR") == 0
2210 || strcmp (str, "SPSR") == 0
2211 /* Lower case versions for backwards compatability. */
2212 || strcmp (str, "cpsr") == 0
2213 || strcmp (str, "spsr") == 0)
2214 skip = 4;
2215
2216 /* This is for backwards compatability with older toolchains. */
2217 else if ( strcmp (str, "cpsr_all") == 0
2218 || strcmp (str, "spsr_all") == 0)
2219 skip = 8;
2220 else
2221 {
2222 inst.error = _("{C|S}PSR expected");
2223 return;
2224 }
2225
2226 if (* str == 's' || * str == 'S')
2227 inst.instruction |= SPSR_BIT;
2228 str += skip;
2229
2230 inst.instruction |= flags;
2231 end_of_line (str);
2232 }
2233
2234 /* Two possible forms:
2235 "{C|S}PSR_<field>, Rm",
2236 "{C|S}PSR_f, #expression". */
2237
2238 static void
2239 do_msr (str, flags)
2240 char * str;
2241 unsigned long flags;
2242 {
2243 skip_whitespace (str);
2244
2245 if (psr_required_here (& str) == FAIL)
2246 return;
2247
2248 if (skip_past_comma (& str) == FAIL)
2249 {
2250 inst.error = _("comma missing after psr flags");
2251 return;
2252 }
2253
2254 skip_whitespace (str);
2255
2256 if (reg_required_here (& str, 0) != FAIL)
2257 {
2258 inst.error = NULL;
2259 inst.instruction |= flags;
2260 end_of_line (str);
2261 return;
2262 }
2263
2264 if (! is_immediate_prefix (* str))
2265 {
2266 inst.error =
2267 _("only a register or immediate value can follow a psr flag");
2268 return;
2269 }
2270
2271 str ++;
2272 inst.error = NULL;
2273
2274 if (my_get_expression (& inst.reloc.exp, & str))
2275 {
2276 inst.error =
2277 _("only a register or immediate value can follow a psr flag");
2278 return;
2279 }
2280
2281 if ((cpu_variant & ARM_EXT_V5) != ARM_EXT_V5
2282 && inst.instruction & ((PSR_c | PSR_x | PSR_s) << PSR_SHIFT))
2283 {
2284 inst.error = _("immediate value cannot be used to set this field");
2285 return;
2286 }
2287
2288 flags |= INST_IMMEDIATE;
2289
2290 if (inst.reloc.exp.X_add_symbol)
2291 {
2292 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
2293 inst.reloc.pc_rel = 0;
2294 }
2295 else
2296 {
2297 unsigned value = validate_immediate (inst.reloc.exp.X_add_number);
2298
2299 if (value == (unsigned) FAIL)
2300 {
2301 inst.error = _("Invalid constant");
2302 return;
2303 }
2304
2305 inst.instruction |= value;
2306 }
2307
2308 inst.error = NULL;
2309 inst.instruction |= flags;
2310 end_of_line (str);
2311 }
2312
2313 /* Long Multiply Parser
2314 UMULL RdLo, RdHi, Rm, Rs
2315 SMULL RdLo, RdHi, Rm, Rs
2316 UMLAL RdLo, RdHi, Rm, Rs
2317 SMLAL RdLo, RdHi, Rm, Rs. */
2318
2319 static void
2320 do_mull (str, flags)
2321 char * str;
2322 unsigned long flags;
2323 {
2324 int rdlo, rdhi, rm, rs;
2325
2326 /* Only one format "rdlo, rdhi, rm, rs". */
2327 skip_whitespace (str);
2328
2329 if ((rdlo = reg_required_here (&str, 12)) == FAIL)
2330 {
2331 inst.error = BAD_ARGS;
2332 return;
2333 }
2334
2335 if (skip_past_comma (&str) == FAIL
2336 || (rdhi = reg_required_here (&str, 16)) == FAIL)
2337 {
2338 inst.error = BAD_ARGS;
2339 return;
2340 }
2341
2342 if (skip_past_comma (&str) == FAIL
2343 || (rm = reg_required_here (&str, 0)) == FAIL)
2344 {
2345 inst.error = BAD_ARGS;
2346 return;
2347 }
2348
2349 /* rdhi, rdlo and rm must all be different. */
2350 if (rdlo == rdhi || rdlo == rm || rdhi == rm)
2351 as_tsktsk (_("rdhi, rdlo and rm must all be different"));
2352
2353 if (skip_past_comma (&str) == FAIL
2354 || (rs = reg_required_here (&str, 8)) == FAIL)
2355 {
2356 inst.error = BAD_ARGS;
2357 return;
2358 }
2359
2360 if (rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC)
2361 {
2362 inst.error = BAD_PC;
2363 return;
2364 }
2365
2366 inst.instruction |= flags;
2367 end_of_line (str);
2368 return;
2369 }
2370
2371 static void
2372 do_mul (str, flags)
2373 char * str;
2374 unsigned long flags;
2375 {
2376 int rd, rm;
2377
2378 /* Only one format "rd, rm, rs". */
2379 skip_whitespace (str);
2380
2381 if ((rd = reg_required_here (&str, 16)) == FAIL)
2382 {
2383 inst.error = BAD_ARGS;
2384 return;
2385 }
2386
2387 if (rd == REG_PC)
2388 {
2389 inst.error = BAD_PC;
2390 return;
2391 }
2392
2393 if (skip_past_comma (&str) == FAIL
2394 || (rm = reg_required_here (&str, 0)) == FAIL)
2395 {
2396 inst.error = BAD_ARGS;
2397 return;
2398 }
2399
2400 if (rm == REG_PC)
2401 {
2402 inst.error = BAD_PC;
2403 return;
2404 }
2405
2406 if (rm == rd)
2407 as_tsktsk (_("rd and rm should be different in mul"));
2408
2409 if (skip_past_comma (&str) == FAIL
2410 || (rm = reg_required_here (&str, 8)) == FAIL)
2411 {
2412 inst.error = BAD_ARGS;
2413 return;
2414 }
2415
2416 if (rm == REG_PC)
2417 {
2418 inst.error = BAD_PC;
2419 return;
2420 }
2421
2422 inst.instruction |= flags;
2423 end_of_line (str);
2424 return;
2425 }
2426
2427 static void
2428 do_mla (str, flags)
2429 char * str;
2430 unsigned long flags;
2431 {
2432 int rd, rm;
2433
2434 /* Only one format "rd, rm, rs, rn". */
2435 skip_whitespace (str);
2436
2437 if ((rd = reg_required_here (&str, 16)) == FAIL)
2438 {
2439 inst.error = BAD_ARGS;
2440 return;
2441 }
2442
2443 if (rd == REG_PC)
2444 {
2445 inst.error = BAD_PC;
2446 return;
2447 }
2448
2449 if (skip_past_comma (&str) == FAIL
2450 || (rm = reg_required_here (&str, 0)) == FAIL)
2451 {
2452 inst.error = BAD_ARGS;
2453 return;
2454 }
2455
2456 if (rm == REG_PC)
2457 {
2458 inst.error = BAD_PC;
2459 return;
2460 }
2461
2462 if (rm == rd)
2463 as_tsktsk (_("rd and rm should be different in mla"));
2464
2465 if (skip_past_comma (&str) == FAIL
2466 || (rd = reg_required_here (&str, 8)) == FAIL
2467 || skip_past_comma (&str) == FAIL
2468 || (rm = reg_required_here (&str, 12)) == FAIL)
2469 {
2470 inst.error = BAD_ARGS;
2471 return;
2472 }
2473
2474 if (rd == REG_PC || rm == REG_PC)
2475 {
2476 inst.error = BAD_PC;
2477 return;
2478 }
2479
2480 inst.instruction |= flags;
2481 end_of_line (str);
2482 return;
2483 }
2484
2485 /* Expects *str -> the characters "acc0", possibly with leading blanks.
2486 Advances *str to the next non-alphanumeric.
2487 Returns 0, or else FAIL (in which case sets inst.error).
2488
2489 (In a future XScale, there may be accumulators other than zero.
2490 At that time this routine and its callers can be upgraded to suit.) */
2491
2492 static int
2493 accum0_required_here (str)
2494 char ** str;
2495 {
2496 static char buff [128]; /* Note the address is taken. Hence, static. */
2497 char * p = * str;
2498 char c;
2499 int result = 0; /* The accum number. */
2500
2501 skip_whitespace (p);
2502
2503 *str = p; /* Advance caller's string pointer too. */
2504 c = *p++;
2505 while (isalnum (c))
2506 c = *p++;
2507
2508 *--p = 0; /* Aap nul into input buffer at non-alnum. */
2509
2510 if (! ( streq (*str, "acc0") || streq (*str, "ACC0")))
2511 {
2512 sprintf (buff, _("acc0 expected, not '%.100s'"), *str);
2513 inst.error = buff;
2514 result = FAIL;
2515 }
2516
2517 *p = c; /* Unzap. */
2518 *str = p; /* Caller's string pointer to after match. */
2519 return result;
2520 }
2521
2522 /* Expects **str -> after a comma. May be leading blanks.
2523 Advances *str, recognizing a load mode, and setting inst.instruction.
2524 Returns rn, or else FAIL (in which case may set inst.error
2525 and not advance str)
2526
2527 Note: doesn't know Rd, so no err checks that require such knowledge. */
2528
2529 static int
2530 ld_mode_required_here (string)
2531 char ** string;
2532 {
2533 char * str = * string;
2534 int rn;
2535 int pre_inc = 0;
2536
2537 skip_whitespace (str);
2538
2539 if (* str == '[')
2540 {
2541 str++;
2542
2543 skip_whitespace (str);
2544
2545 if ((rn = reg_required_here (& str, 16)) == FAIL)
2546 return FAIL;
2547
2548 skip_whitespace (str);
2549
2550 if (* str == ']')
2551 {
2552 str ++;
2553
2554 if (skip_past_comma (& str) == SUCCESS)
2555 {
2556 /* [Rn],... (post inc) */
2557 if (ldst_extend (& str, 1) == FAIL)
2558 return FAIL;
2559 }
2560 else /* [Rn] */
2561 {
2562 skip_whitespace (str);
2563
2564 if (* str == '!')
2565 {
2566 str ++;
2567 inst.instruction |= WRITE_BACK;
2568 }
2569
2570 inst.instruction |= INDEX_UP | HWOFFSET_IMM;
2571 pre_inc = 1;
2572 }
2573 }
2574 else /* [Rn,...] */
2575 {
2576 if (skip_past_comma (& str) == FAIL)
2577 {
2578 inst.error = _("pre-indexed expression expected");
2579 return FAIL;
2580 }
2581
2582 pre_inc = 1;
2583
2584 if (ldst_extend (& str, 1) == FAIL)
2585 return FAIL;
2586
2587 skip_whitespace (str);
2588
2589 if (* str ++ != ']')
2590 {
2591 inst.error = _("missing ]");
2592 return FAIL;
2593 }
2594
2595 skip_whitespace (str);
2596
2597 if (* str == '!')
2598 {
2599 str ++;
2600 inst.instruction |= WRITE_BACK;
2601 }
2602 }
2603 }
2604 else if (* str == '=') /* ldr's "r,=label" syntax */
2605 /* We should never reach here, because <text> = <expression> is
2606 caught gas/read.c read_a_source_file() as a .set operation. */
2607 return FAIL;
2608 else /* PC +- 8 bit immediate offset. */
2609 {
2610 if (my_get_expression (& inst.reloc.exp, & str))
2611 return FAIL;
2612
2613 inst.instruction |= HWOFFSET_IMM; /* The I bit. */
2614 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
2615 inst.reloc.exp.X_add_number -= 8; /* PC rel adjust. */
2616 inst.reloc.pc_rel = 1;
2617 inst.instruction |= (REG_PC << 16);
2618
2619 rn = REG_PC;
2620 pre_inc = 1;
2621 }
2622
2623 inst.instruction |= (pre_inc ? PRE_INDEX : 0);
2624 * string = str;
2625
2626 return rn;
2627 }
2628
2629 /* ARM V5E (El Segundo) signed-multiply-accumulate (argument parse)
2630 SMLAxy{cond} Rd,Rm,Rs,Rn
2631 SMLAWy{cond} Rd,Rm,Rs,Rn
2632 Error if any register is R15. */
2633
2634 static void
2635 do_smla (str, flags)
2636 char * str;
2637 unsigned long flags;
2638 {
2639 int rd, rm, rs, rn;
2640
2641 skip_whitespace (str);
2642
2643 if ((rd = reg_required_here (& str, 16)) == FAIL
2644 || skip_past_comma (& str) == FAIL
2645 || (rm = reg_required_here (& str, 0)) == FAIL
2646 || skip_past_comma (& str) == FAIL
2647 || (rs = reg_required_here (& str, 8)) == FAIL
2648 || skip_past_comma (& str) == FAIL
2649 || (rn = reg_required_here (& str, 12)) == FAIL)
2650 inst.error = BAD_ARGS;
2651
2652 else if (rd == REG_PC || rm == REG_PC || rs == REG_PC || rn == REG_PC)
2653 inst.error = BAD_PC;
2654
2655 else if (flags)
2656 inst.error = BAD_FLAGS;
2657
2658 else
2659 end_of_line (str);
2660 }
2661
2662 /* ARM V5E (El Segundo) signed-multiply-accumulate-long (argument parse)
2663 SMLALxy{cond} Rdlo,Rdhi,Rm,Rs
2664 Error if any register is R15.
2665 Warning if Rdlo == Rdhi. */
2666
2667 static void
2668 do_smlal (str, flags)
2669 char * str;
2670 unsigned long flags;
2671 {
2672 int rdlo, rdhi, rm, rs;
2673
2674 skip_whitespace (str);
2675
2676 if ((rdlo = reg_required_here (& str, 12)) == FAIL
2677 || skip_past_comma (& str) == FAIL
2678 || (rdhi = reg_required_here (& str, 16)) == FAIL
2679 || skip_past_comma (& str) == FAIL
2680 || (rm = reg_required_here (& str, 0)) == FAIL
2681 || skip_past_comma (& str) == FAIL
2682 || (rs = reg_required_here (& str, 8)) == FAIL)
2683 {
2684 inst.error = BAD_ARGS;
2685 return;
2686 }
2687
2688 if (rdlo == REG_PC || rdhi == REG_PC || rm == REG_PC || rs == REG_PC)
2689 {
2690 inst.error = BAD_PC;
2691 return;
2692 }
2693
2694 if (rdlo == rdhi)
2695 as_tsktsk (_("rdhi and rdlo must be different"));
2696
2697 if (flags)
2698 inst.error = BAD_FLAGS;
2699 else
2700 end_of_line (str);
2701 }
2702
2703 /* ARM V5E (El Segundo) signed-multiply (argument parse)
2704 SMULxy{cond} Rd,Rm,Rs
2705 Error if any register is R15. */
2706
2707 static void
2708 do_smul (str, flags)
2709 char * str;
2710 unsigned long flags;
2711 {
2712 int rd, rm, rs;
2713
2714 skip_whitespace (str);
2715
2716 if ((rd = reg_required_here (& str, 16)) == FAIL
2717 || skip_past_comma (& str) == FAIL
2718 || (rm = reg_required_here (& str, 0)) == FAIL
2719 || skip_past_comma (& str) == FAIL
2720 || (rs = reg_required_here (& str, 8)) == FAIL)
2721 inst.error = BAD_ARGS;
2722
2723 else if (rd == REG_PC || rm == REG_PC || rs == REG_PC)
2724 inst.error = BAD_PC;
2725
2726 else if (flags)
2727 inst.error = BAD_FLAGS;
2728
2729 else
2730 end_of_line (str);
2731 }
2732
2733 /* ARM V5E (El Segundo) saturating-add/subtract (argument parse)
2734 Q[D]{ADD,SUB}{cond} Rd,Rm,Rn
2735 Error if any register is R15. */
2736
2737 static void
2738 do_qadd (str, flags)
2739 char * str;
2740 unsigned long flags;
2741 {
2742 int rd, rm, rn;
2743
2744 skip_whitespace (str);
2745
2746 if ((rd = reg_required_here (& str, 12)) == FAIL
2747 || skip_past_comma (& str) == FAIL
2748 || (rm = reg_required_here (& str, 0)) == FAIL
2749 || skip_past_comma (& str) == FAIL
2750 || (rn = reg_required_here (& str, 16)) == FAIL)
2751 inst.error = BAD_ARGS;
2752
2753 else if (rd == REG_PC || rm == REG_PC || rn == REG_PC)
2754 inst.error = BAD_PC;
2755
2756 else if (flags)
2757 inst.error = BAD_FLAGS;
2758
2759 else
2760 end_of_line (str);
2761 }
2762
2763 /* ARM V5E (el Segundo)
2764 MCRRcc <coproc>, <opcode>, <Rd>, <Rn>, <CRm>.
2765 MRRCcc <coproc>, <opcode>, <Rd>, <Rn>, <CRm>.
2766
2767 These are equivalent to the XScale instructions MAR and MRA,
2768 respectively, when coproc == 0, opcode == 0, and CRm == 0.
2769
2770 Result unpredicatable if Rd or Rn is R15. */
2771
2772 static void
2773 do_co_reg2c (str, flags)
2774 char * str;
2775 unsigned long flags;
2776 {
2777 int rd, rn;
2778
2779 skip_whitespace (str);
2780
2781 if (co_proc_number (& str) == FAIL)
2782 {
2783 if (!inst.error)
2784 inst.error = BAD_ARGS;
2785 return;
2786 }
2787
2788 if (skip_past_comma (& str) == FAIL
2789 || cp_opc_expr (& str, 4, 4) == FAIL)
2790 {
2791 if (!inst.error)
2792 inst.error = BAD_ARGS;
2793 return;
2794 }
2795
2796 if (skip_past_comma (& str) == FAIL
2797 || (rd = reg_required_here (& str, 12)) == FAIL)
2798 {
2799 if (!inst.error)
2800 inst.error = BAD_ARGS;
2801 return;
2802 }
2803
2804 if (skip_past_comma (& str) == FAIL
2805 || (rn = reg_required_here (& str, 16)) == FAIL)
2806 {
2807 if (!inst.error)
2808 inst.error = BAD_ARGS;
2809 return;
2810 }
2811
2812 /* Unpredictable result if rd or rn is R15. */
2813 if (rd == REG_PC || rn == REG_PC)
2814 as_tsktsk
2815 (_("Warning: Instruction unpredictable when using r15"));
2816
2817 if (skip_past_comma (& str) == FAIL
2818 || cp_reg_required_here (& str, 0) == FAIL)
2819 {
2820 if (!inst.error)
2821 inst.error = BAD_ARGS;
2822 return;
2823 }
2824
2825 if (flags)
2826 inst.error = BAD_COND;
2827
2828 end_of_line (str);
2829 }
2830
2831 /* ARM V5 count-leading-zeroes instruction (argument parse)
2832 CLZ{<cond>} <Rd>, <Rm>
2833 Condition defaults to COND_ALWAYS.
2834 Error if Rd or Rm are R15. */
2835
2836 static void
2837 do_clz (str, flags)
2838 char * str;
2839 unsigned long flags;
2840 {
2841 int rd, rm;
2842
2843 if (flags)
2844 {
2845 as_bad (BAD_FLAGS);
2846 return;
2847 }
2848
2849 skip_whitespace (str);
2850
2851 if (((rd = reg_required_here (& str, 12)) == FAIL)
2852 || (skip_past_comma (& str) == FAIL)
2853 || ((rm = reg_required_here (& str, 0)) == FAIL))
2854 inst.error = BAD_ARGS;
2855
2856 else if (rd == REG_PC || rm == REG_PC )
2857 inst.error = BAD_PC;
2858
2859 else
2860 end_of_line (str);
2861 }
2862
2863 /* ARM V5 (argument parse)
2864 LDC2{L} <coproc>, <CRd>, <addressing mode>
2865 STC2{L} <coproc>, <CRd>, <addressing mode>
2866 Instruction is not conditional, and has 0xf in the codition field.
2867 Otherwise, it's the same as LDC/STC. */
2868
2869 static void
2870 do_lstc2 (str, flags)
2871 char * str;
2872 unsigned long flags;
2873 {
2874 if (flags)
2875 inst.error = BAD_COND;
2876
2877 skip_whitespace (str);
2878
2879 if (co_proc_number (& str) == FAIL)
2880 {
2881 if (!inst.error)
2882 inst.error = BAD_ARGS;
2883 }
2884 else if (skip_past_comma (& str) == FAIL
2885 || cp_reg_required_here (& str, 12) == FAIL)
2886 {
2887 if (!inst.error)
2888 inst.error = BAD_ARGS;
2889 }
2890 else if (skip_past_comma (& str) == FAIL
2891 || cp_address_required_here (& str) == FAIL)
2892 {
2893 if (! inst.error)
2894 inst.error = BAD_ARGS;
2895 }
2896 else
2897 end_of_line (str);
2898 }
2899
2900 /* ARM V5 (argument parse)
2901 CDP2 <coproc>, <opcode_1>, <CRd>, <CRn>, <CRm>, <opcode_2>
2902 Instruction is not conditional, and has 0xf in the condition field.
2903 Otherwise, it's the same as CDP. */
2904
2905 static void
2906 do_cdp2 (str, flags)
2907 char * str;
2908 unsigned long flags;
2909 {
2910 skip_whitespace (str);
2911
2912 if (co_proc_number (& str) == FAIL)
2913 {
2914 if (!inst.error)
2915 inst.error = BAD_ARGS;
2916 return;
2917 }
2918
2919 if (skip_past_comma (& str) == FAIL
2920 || cp_opc_expr (& str, 20,4) == FAIL)
2921 {
2922 if (!inst.error)
2923 inst.error = BAD_ARGS;
2924 return;
2925 }
2926
2927 if (skip_past_comma (& str) == FAIL
2928 || cp_reg_required_here (& str, 12) == FAIL)
2929 {
2930 if (!inst.error)
2931 inst.error = BAD_ARGS;
2932 return;
2933 }
2934
2935 if (skip_past_comma (& str) == FAIL
2936 || cp_reg_required_here (& str, 16) == FAIL)
2937 {
2938 if (!inst.error)
2939 inst.error = BAD_ARGS;
2940 return;
2941 }
2942
2943 if (skip_past_comma (& str) == FAIL
2944 || cp_reg_required_here (& str, 0) == FAIL)
2945 {
2946 if (!inst.error)
2947 inst.error = BAD_ARGS;
2948 return;
2949 }
2950
2951 if (skip_past_comma (& str) == SUCCESS)
2952 {
2953 if (cp_opc_expr (& str, 5, 3) == FAIL)
2954 {
2955 if (!inst.error)
2956 inst.error = BAD_ARGS;
2957 return;
2958 }
2959 }
2960
2961 if (flags)
2962 inst.error = BAD_FLAGS;
2963
2964 end_of_line (str);
2965 }
2966
2967 /* ARM V5 (argument parse)
2968 MCR2 <coproc>, <opcode_1>, <Rd>, <CRn>, <CRm>, <opcode_2>
2969 MRC2 <coproc>, <opcode_1>, <Rd>, <CRn>, <CRm>, <opcode_2>
2970 Instruction is not conditional, and has 0xf in the condition field.
2971 Otherwise, it's the same as MCR/MRC. */
2972
2973 static void
2974 do_co_reg2 (str, flags)
2975 char * str;
2976 unsigned long flags;
2977 {
2978 skip_whitespace (str);
2979
2980 if (co_proc_number (& str) == FAIL)
2981 {
2982 if (!inst.error)
2983 inst.error = BAD_ARGS;
2984 return;
2985 }
2986
2987 if (skip_past_comma (& str) == FAIL
2988 || cp_opc_expr (& str, 21, 3) == FAIL)
2989 {
2990 if (!inst.error)
2991 inst.error = BAD_ARGS;
2992 return;
2993 }
2994
2995 if (skip_past_comma (& str) == FAIL
2996 || reg_required_here (& str, 12) == FAIL)
2997 {
2998 if (!inst.error)
2999 inst.error = BAD_ARGS;
3000 return;
3001 }
3002
3003 if (skip_past_comma (& str) == FAIL
3004 || cp_reg_required_here (& str, 16) == FAIL)
3005 {
3006 if (!inst.error)
3007 inst.error = BAD_ARGS;
3008 return;
3009 }
3010
3011 if (skip_past_comma (& str) == FAIL
3012 || cp_reg_required_here (& str, 0) == FAIL)
3013 {
3014 if (!inst.error)
3015 inst.error = BAD_ARGS;
3016 return;
3017 }
3018
3019 if (skip_past_comma (& str) == SUCCESS)
3020 {
3021 if (cp_opc_expr (& str, 5, 3) == FAIL)
3022 {
3023 if (!inst.error)
3024 inst.error = BAD_ARGS;
3025 return;
3026 }
3027 }
3028
3029 if (flags)
3030 inst.error = BAD_COND;
3031
3032 end_of_line (str);
3033 }
3034
3035 /* THUMB V5 breakpoint instruction (argument parse)
3036 BKPT <immed_8>. */
3037
3038 static void
3039 do_t_bkpt (str)
3040 char * str;
3041 {
3042 expressionS expr;
3043 unsigned long number;
3044
3045 skip_whitespace (str);
3046
3047 /* Allow optional leading '#'. */
3048 if (is_immediate_prefix (*str))
3049 str ++;
3050
3051 memset (& expr, '\0', sizeof (expr));
3052 if (my_get_expression (& expr, & str) || (expr.X_op != O_constant))
3053 {
3054 inst.error = _("bad or missing expression");
3055 return;
3056 }
3057
3058 number = expr.X_add_number;
3059
3060 /* Check it fits an 8 bit unsigned. */
3061 if (number != (number & 0xff))
3062 {
3063 inst.error = _("immediate value out of range");
3064 return;
3065 }
3066
3067 inst.instruction |= number;
3068
3069 end_of_line (str);
3070 }
3071
3072 /* ARM V5 branch-link-exchange (argument parse) for BLX(1) only.
3073 Expects inst.instruction is set for BLX(1).
3074 Note: this is cloned from do_branch, and the reloc changed to be a
3075 new one that can cope with setting one extra bit (the H bit). */
3076
3077 static void
3078 do_branch25 (str, flags)
3079 char * str;
3080 unsigned long flags ATTRIBUTE_UNUSED;
3081 {
3082 if (my_get_expression (& inst.reloc.exp, & str))
3083 return;
3084
3085 #ifdef OBJ_ELF
3086 {
3087 char * save_in;
3088
3089 /* ScottB: February 5, 1998 */
3090 /* Check to see of PLT32 reloc required for the instruction. */
3091
3092 /* arm_parse_reloc() works on input_line_pointer.
3093 We actually want to parse the operands to the branch instruction
3094 passed in 'str'. Save the input pointer and restore it later. */
3095 save_in = input_line_pointer;
3096 input_line_pointer = str;
3097
3098 if (inst.reloc.exp.X_op == O_symbol
3099 && *str == '('
3100 && arm_parse_reloc () == BFD_RELOC_ARM_PLT32)
3101 {
3102 inst.reloc.type = BFD_RELOC_ARM_PLT32;
3103 inst.reloc.pc_rel = 0;
3104 /* Modify str to point to after parsed operands, otherwise
3105 end_of_line() will complain about the (PLT) left in str. */
3106 str = input_line_pointer;
3107 }
3108 else
3109 {
3110 inst.reloc.type = BFD_RELOC_ARM_PCREL_BLX;
3111 inst.reloc.pc_rel = 1;
3112 }
3113
3114 input_line_pointer = save_in;
3115 }
3116 #else
3117 inst.reloc.type = BFD_RELOC_ARM_PCREL_BLX;
3118 inst.reloc.pc_rel = 1;
3119 #endif /* OBJ_ELF */
3120
3121 end_of_line (str);
3122 }
3123
3124 /* ARM V5 branch-link-exchange instruction (argument parse)
3125 BLX <target_addr> ie BLX(1)
3126 BLX{<condition>} <Rm> ie BLX(2)
3127 Unfortunately, there are two different opcodes for this mnemonic.
3128 So, the insns[].value is not used, and the code here zaps values
3129 into inst.instruction.
3130 Also, the <target_addr> can be 25 bits, hence has its own reloc. */
3131
3132 static void
3133 do_blx (str, flags)
3134 char * str;
3135 unsigned long flags;
3136 {
3137 char * mystr = str;
3138 int rm;
3139
3140 if (flags)
3141 {
3142 as_bad (BAD_FLAGS);
3143 return;
3144 }
3145
3146 skip_whitespace (mystr);
3147 rm = reg_required_here (& mystr, 0);
3148
3149 /* The above may set inst.error. Ignore his opinion. */
3150 inst.error = 0;
3151
3152 if (rm != FAIL)
3153 {
3154 /* Arg is a register.
3155 Use the condition code our caller put in inst.instruction.
3156 Pass ourselves off as a BX with a funny opcode. */
3157 inst.instruction |= 0x012fff30;
3158 do_bx (str, flags);
3159 }
3160 else
3161 {
3162 /* This must be is BLX <target address>, no condition allowed. */
3163 if (inst.instruction != COND_ALWAYS)
3164 {
3165 inst.error = BAD_COND;
3166 return;
3167 }
3168
3169 inst.instruction = 0xfafffffe;
3170
3171 /* Process like a B/BL, but with a different reloc.
3172 Note that B/BL expecte fffffe, not 0, offset in the opcode table. */
3173 do_branch25 (str, flags);
3174 }
3175 }
3176
3177 /* ARM V5 Thumb BLX (argument parse)
3178 BLX <target_addr> which is BLX(1)
3179 BLX <Rm> which is BLX(2)
3180 Unfortunately, there are two different opcodes for this mnemonic.
3181 So, the tinsns[].value is not used, and the code here zaps values
3182 into inst.instruction. */
3183
3184 static void
3185 do_t_blx (str)
3186 char * str;
3187 {
3188 char * mystr = str;
3189 int rm;
3190
3191 skip_whitespace (mystr);
3192 inst.instruction = 0x4780;
3193
3194 /* Note that this call is to the ARM register recognizer. BLX(2)
3195 uses the ARM register space, not the Thumb one, so a call to
3196 thumb_reg() would be wrong. */
3197 rm = reg_required_here (& mystr, 3);
3198 inst.error = 0;
3199
3200 if (rm != FAIL)
3201 {
3202 /* It's BLX(2). The .instruction was zapped with rm & is final. */
3203 inst.size = 2;
3204 }
3205 else
3206 {
3207 /* No ARM register. This must be BLX(1). Change the .instruction. */
3208 inst.instruction = 0xf7ffeffe;
3209 inst.size = 4;
3210
3211 if (my_get_expression (& inst.reloc.exp, & mystr))
3212 return;
3213
3214 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BLX;
3215 inst.reloc.pc_rel = 1;
3216 }
3217
3218 end_of_line (mystr);
3219 }
3220
3221 /* ARM V5 breakpoint instruction (argument parse)
3222 BKPT <16 bit unsigned immediate>
3223 Instruction is not conditional.
3224 The bit pattern given in insns[] has the COND_ALWAYS condition,
3225 and it is an error if the caller tried to override that.
3226 Note "flags" is nonzero if a flag was supplied (which is an error). */
3227
3228 static void
3229 do_bkpt (str, flags)
3230 char * str;
3231 unsigned long flags;
3232 {
3233 expressionS expr;
3234 unsigned long number;
3235
3236 skip_whitespace (str);
3237
3238 /* Allow optional leading '#'. */
3239 if (is_immediate_prefix (* str))
3240 str++;
3241
3242 memset (& expr, '\0', sizeof (expr));
3243
3244 if (my_get_expression (& expr, & str) || (expr.X_op != O_constant))
3245 {
3246 inst.error = _("bad or missing expression");
3247 return;
3248 }
3249
3250 number = expr.X_add_number;
3251
3252 /* Check it fits a 16 bit unsigned. */
3253 if (number != (number & 0xffff))
3254 {
3255 inst.error = _("immediate value out of range");
3256 return;
3257 }
3258
3259 /* Top 12 of 16 bits to bits 19:8. */
3260 inst.instruction |= (number & 0xfff0) << 4;
3261
3262 /* Bottom 4 of 16 bits to bits 3:0. */
3263 inst.instruction |= number & 0xf;
3264
3265 end_of_line (str);
3266
3267 if (flags)
3268 inst.error = BAD_FLAGS;
3269 }
3270
3271 /* Xscale multiply-accumulate (argument parse)
3272 MIAcc acc0,Rm,Rs
3273 MIAPHcc acc0,Rm,Rs
3274 MIAxycc acc0,Rm,Rs. */
3275
3276 static void
3277 do_mia (str, flags)
3278 char * str;
3279 unsigned long flags;
3280 {
3281 int rs;
3282 int rm;
3283
3284 if (flags)
3285 as_bad (BAD_FLAGS);
3286
3287 else if (accum0_required_here (& str) == FAIL)
3288 inst.error = ERR_NO_ACCUM;
3289
3290 else if (skip_past_comma (& str) == FAIL
3291 || (rm = reg_required_here (& str, 0)) == FAIL)
3292 inst.error = BAD_ARGS;
3293
3294 else if (skip_past_comma (& str) == FAIL
3295 || (rs = reg_required_here (& str, 12)) == FAIL)
3296 inst.error = BAD_ARGS;
3297
3298 /* inst.instruction has now been zapped with both rm and rs. */
3299 else if (rm == REG_PC || rs == REG_PC)
3300 inst.error = BAD_PC; /* Undefined result if rm or rs is R15. */
3301
3302 else
3303 end_of_line (str);
3304 }
3305
3306 /* Xscale move-accumulator-register (argument parse)
3307
3308 MARcc acc0,RdLo,RdHi. */
3309
3310 static void
3311 do_mar (str, flags)
3312 char * str;
3313 unsigned long flags;
3314 {
3315 int rdlo, rdhi;
3316
3317 if (flags)
3318 as_bad (BAD_FLAGS);
3319
3320 else if (accum0_required_here (& str) == FAIL)
3321 inst.error = ERR_NO_ACCUM;
3322
3323 else if (skip_past_comma (& str) == FAIL
3324 || (rdlo = reg_required_here (& str, 12)) == FAIL)
3325 inst.error = BAD_ARGS;
3326
3327 else if (skip_past_comma (& str) == FAIL
3328 || (rdhi = reg_required_here (& str, 16)) == FAIL)
3329 inst.error = BAD_ARGS;
3330
3331 /* inst.instruction has now been zapped with both rdlo and rdhi. */
3332 else if (rdlo == REG_PC || rdhi == REG_PC)
3333 inst.error = BAD_PC; /* Undefined result if rdlo or rdhi is R15. */
3334
3335 else
3336 end_of_line (str);
3337 }
3338
3339 /* Xscale move-register-accumulator (argument parse)
3340
3341 MRAcc RdLo,RdHi,acc0. */
3342
3343 static void
3344 do_mra (str, flags)
3345 char * str;
3346 unsigned long flags;
3347 {
3348 int rdlo;
3349 int rdhi;
3350
3351 if (flags)
3352 {
3353 as_bad (BAD_FLAGS);
3354 return;
3355 }
3356
3357 skip_whitespace (str);
3358
3359 if ((rdlo = reg_required_here (& str, 12)) == FAIL)
3360 inst.error = BAD_ARGS;
3361
3362 else if (skip_past_comma (& str) == FAIL
3363 || (rdhi = reg_required_here (& str, 16)) == FAIL)
3364 inst.error = BAD_ARGS;
3365
3366 else if (skip_past_comma (& str) == FAIL
3367 || accum0_required_here (& str) == FAIL)
3368 inst.error = ERR_NO_ACCUM;
3369
3370 /* inst.instruction has now been zapped with both rdlo and rdhi. */
3371 else if (rdlo == rdhi)
3372 inst.error = BAD_ARGS; /* Undefined result if 2 writes to same reg. */
3373
3374 else if (rdlo == REG_PC || rdhi == REG_PC)
3375 inst.error = BAD_PC; /* Undefined result if rdlo or rdhi is R15. */
3376 else
3377 end_of_line (str);
3378 }
3379
3380 /* Xscale: Preload-Cache
3381
3382 PLD <addr_mode>
3383
3384 Syntactically, like LDR with B=1, W=0, L=1. */
3385
3386 static void
3387 do_pld (str, flags)
3388 char * str;
3389 unsigned long flags;
3390 {
3391 int rd;
3392
3393 if (flags)
3394 {
3395 as_bad (BAD_FLAGS);
3396 return;
3397 }
3398
3399 skip_whitespace (str);
3400
3401 if (* str != '[')
3402 {
3403 inst.error = _("'[' expected after PLD mnemonic");
3404 return;
3405 }
3406
3407 ++ str;
3408 skip_whitespace (str);
3409
3410 if ((rd = reg_required_here (& str, 16)) == FAIL)
3411 return;
3412
3413 skip_whitespace (str);
3414
3415 if (* str == ']')
3416 {
3417 /* [Rn], ... ? */
3418 ++ str;
3419 skip_whitespace (str);
3420
3421 if (skip_past_comma (& str) == SUCCESS)
3422 {
3423 if (ldst_extend (& str, 0) == FAIL)
3424 return;
3425 }
3426 else if (* str == '!') /* [Rn]! */
3427 {
3428 inst.error = _("writeback used in preload instruction");
3429 ++ str;
3430 }
3431 else /* [Rn] */
3432 inst.instruction |= INDEX_UP | PRE_INDEX;
3433 }
3434 else /* [Rn, ...] */
3435 {
3436 if (skip_past_comma (& str) == FAIL)
3437 {
3438 inst.error = _("pre-indexed expression expected");
3439 return;
3440 }
3441
3442 if (ldst_extend (& str, 0) == FAIL)
3443 return;
3444
3445 skip_whitespace (str);
3446
3447 if (* str != ']')
3448 {
3449 inst.error = _("missing ]");
3450 return;
3451 }
3452
3453 ++ str;
3454 skip_whitespace (str);
3455
3456 if (* str == '!') /* [Rn]! */
3457 {
3458 inst.error = _("writeback used in preload instruction");
3459 ++ str;
3460 }
3461
3462 inst.instruction |= PRE_INDEX;
3463 }
3464
3465 end_of_line (str);
3466 }
3467
3468 /* Xscale load-consecutive (argument parse)
3469 Mode is like LDRH.
3470
3471 LDRccD R, mode
3472 STRccD R, mode. */
3473
3474 static void
3475 do_ldrd (str, flags)
3476 char * str;
3477 unsigned long flags;
3478 {
3479 int rd;
3480 int rn;
3481
3482 if (flags != DOUBLE_LOAD_FLAG)
3483 {
3484 /* Change instruction pattern to normal ldr/str. */
3485 if (inst.instruction & 0x20)
3486 inst.instruction = (inst.instruction & COND_MASK) | 0x04000000; /* str */
3487 else
3488 inst.instruction = (inst.instruction & COND_MASK) | 0x04100000; /* ldr */
3489
3490 /* Perform a normal load/store instruction parse. */
3491 do_ldst (str, flags);
3492
3493 return;
3494 }
3495
3496 if ((cpu_variant & ARM_EXT_XSCALE) != ARM_EXT_XSCALE)
3497 {
3498 static char buff[128];
3499
3500 --str;
3501 while (isspace (*str))
3502 --str;
3503 str -= 4;
3504
3505 /* Deny all knowledge. */
3506 sprintf (buff, _("bad instruction '%.100s'"), str);
3507 inst.error = buff;
3508 return;
3509 }
3510
3511 skip_whitespace (str);
3512
3513 if ((rd = reg_required_here (& str, 12)) == FAIL)
3514 {
3515 inst.error = BAD_ARGS;
3516 return;
3517 }
3518
3519 if (skip_past_comma (& str) == FAIL
3520 || (rn = ld_mode_required_here (& str)) == FAIL)
3521 {
3522 if (!inst.error)
3523 inst.error = BAD_ARGS;
3524 return;
3525 }
3526
3527 /* inst.instruction has now been zapped with Rd and the addressing mode. */
3528 if (rd & 1) /* Unpredictable result if Rd is odd. */
3529 {
3530 inst.error = _("Destination register must be even");
3531 return;
3532 }
3533
3534 if (rd == REG_LR || rd == 12)
3535 {
3536 inst.error = _("r12 or r14 not allowed here");
3537 return;
3538 }
3539
3540 if (((rd == rn) || (rd + 1 == rn))
3541 &&
3542 ((inst.instruction & WRITE_BACK)
3543 || (!(inst.instruction & PRE_INDEX))))
3544 as_warn (_("pre/post-indexing used when modified address register is destination"));
3545
3546 end_of_line (str);
3547 }
3548
3549 /* Returns the index into fp_values of a floating point number,
3550 or -1 if not in the table. */
3551
3552 static int
3553 my_get_float_expression (str)
3554 char ** str;
3555 {
3556 LITTLENUM_TYPE words[MAX_LITTLENUMS];
3557 char * save_in;
3558 expressionS exp;
3559 int i;
3560 int j;
3561
3562 memset (words, 0, MAX_LITTLENUMS * sizeof (LITTLENUM_TYPE));
3563
3564 /* Look for a raw floating point number. */
3565 if ((save_in = atof_ieee (*str, 'x', words)) != NULL
3566 && is_end_of_line[(unsigned char) *save_in])
3567 {
3568 for (i = 0; i < NUM_FLOAT_VALS; i++)
3569 {
3570 for (j = 0; j < MAX_LITTLENUMS; j++)
3571 {
3572 if (words[j] != fp_values[i][j])
3573 break;
3574 }
3575
3576 if (j == MAX_LITTLENUMS)
3577 {
3578 *str = save_in;
3579 return i;
3580 }
3581 }
3582 }
3583
3584 /* Try and parse a more complex expression, this will probably fail
3585 unless the code uses a floating point prefix (eg "0f"). */
3586 save_in = input_line_pointer;
3587 input_line_pointer = *str;
3588 if (expression (&exp) == absolute_section
3589 && exp.X_op == O_big
3590 && exp.X_add_number < 0)
3591 {
3592 /* FIXME: 5 = X_PRECISION, should be #define'd where we can use it.
3593 Ditto for 15. */
3594 if (gen_to_words (words, 5, (long) 15) == 0)
3595 {
3596 for (i = 0; i < NUM_FLOAT_VALS; i++)
3597 {
3598 for (j = 0; j < MAX_LITTLENUMS; j++)
3599 {
3600 if (words[j] != fp_values[i][j])
3601 break;
3602 }
3603
3604 if (j == MAX_LITTLENUMS)
3605 {
3606 *str = input_line_pointer;
3607 input_line_pointer = save_in;
3608 return i;
3609 }
3610 }
3611 }
3612 }
3613
3614 *str = input_line_pointer;
3615 input_line_pointer = save_in;
3616 return -1;
3617 }
3618
3619 /* Return true if anything in the expression is a bignum. */
3620
3621 static int
3622 walk_no_bignums (sp)
3623 symbolS * sp;
3624 {
3625 if (symbol_get_value_expression (sp)->X_op == O_big)
3626 return 1;
3627
3628 if (symbol_get_value_expression (sp)->X_add_symbol)
3629 {
3630 return (walk_no_bignums (symbol_get_value_expression (sp)->X_add_symbol)
3631 || (symbol_get_value_expression (sp)->X_op_symbol
3632 && walk_no_bignums (symbol_get_value_expression (sp)->X_op_symbol)));
3633 }
3634
3635 return 0;
3636 }
3637
3638 static int
3639 my_get_expression (ep, str)
3640 expressionS * ep;
3641 char ** str;
3642 {
3643 char * save_in;
3644 segT seg;
3645
3646 save_in = input_line_pointer;
3647 input_line_pointer = *str;
3648 seg = expression (ep);
3649
3650 #ifdef OBJ_AOUT
3651 if (seg != absolute_section
3652 && seg != text_section
3653 && seg != data_section
3654 && seg != bss_section
3655 && seg != undefined_section)
3656 {
3657 inst.error = _("bad_segment");
3658 *str = input_line_pointer;
3659 input_line_pointer = save_in;
3660 return 1;
3661 }
3662 #endif
3663
3664 /* Get rid of any bignums now, so that we don't generate an error for which
3665 we can't establish a line number later on. Big numbers are never valid
3666 in instructions, which is where this routine is always called. */
3667 if (ep->X_op == O_big
3668 || (ep->X_add_symbol
3669 && (walk_no_bignums (ep->X_add_symbol)
3670 || (ep->X_op_symbol
3671 && walk_no_bignums (ep->X_op_symbol)))))
3672 {
3673 inst.error = _("Invalid constant");
3674 *str = input_line_pointer;
3675 input_line_pointer = save_in;
3676 return 1;
3677 }
3678
3679 *str = input_line_pointer;
3680 input_line_pointer = save_in;
3681 return 0;
3682 }
3683
3684 /* UNRESTRICT should be one if <shift> <register> is permitted for this
3685 instruction. */
3686
3687 static int
3688 decode_shift (str, unrestrict)
3689 char ** str;
3690 int unrestrict;
3691 {
3692 const struct asm_shift_name * shift;
3693 char * p;
3694 char c;
3695
3696 skip_whitespace (* str);
3697
3698 for (p = * str; isalpha (* p); p ++)
3699 ;
3700
3701 if (p == * str)
3702 {
3703 inst.error = _("Shift expression expected");
3704 return FAIL;
3705 }
3706
3707 c = * p;
3708 * p = '\0';
3709 shift = (const struct asm_shift_name *) hash_find (arm_shift_hsh, * str);
3710 * p = c;
3711
3712 if (shift == NULL)
3713 {
3714 inst.error = _("Shift expression expected");
3715 return FAIL;
3716 }
3717
3718 assert (shift->properties->index == shift_properties[shift->properties->index].index);
3719
3720 if (shift->properties->index == SHIFT_RRX)
3721 {
3722 * str = p;
3723 inst.instruction |= shift->properties->bit_field;
3724 return SUCCESS;
3725 }
3726
3727 skip_whitespace (p);
3728
3729 if (unrestrict && reg_required_here (& p, 8) != FAIL)
3730 {
3731 inst.instruction |= shift->properties->bit_field | SHIFT_BY_REG;
3732 * str = p;
3733 return SUCCESS;
3734 }
3735 else if (! is_immediate_prefix (* p))
3736 {
3737 inst.error = (unrestrict
3738 ? _("shift requires register or #expression")
3739 : _("shift requires #expression"));
3740 * str = p;
3741 return FAIL;
3742 }
3743
3744 inst.error = NULL;
3745 p ++;
3746
3747 if (my_get_expression (& inst.reloc.exp, & p))
3748 return FAIL;
3749
3750 /* Validate some simple #expressions. */
3751 if (inst.reloc.exp.X_op == O_constant)
3752 {
3753 unsigned num = inst.reloc.exp.X_add_number;
3754
3755 /* Reject operations greater than 32. */
3756 if (num > 32
3757 /* Reject a shift of 0 unless the mode allows it. */
3758 || (num == 0 && shift->properties->allows_0 == 0)
3759 /* Reject a shift of 32 unless the mode allows it. */
3760 || (num == 32 && shift->properties->allows_32 == 0)
3761 )
3762 {
3763 /* As a special case we allow a shift of zero for
3764 modes that do not support it to be recoded as an
3765 logical shift left of zero (ie nothing). We warn
3766 about this though. */
3767 if (num == 0)
3768 {
3769 as_warn (_("Shift of 0 ignored."));
3770 shift = & shift_names[0];
3771 assert (shift->properties->index == SHIFT_LSL);
3772 }
3773 else
3774 {
3775 inst.error = _("Invalid immediate shift");
3776 return FAIL;
3777 }
3778 }
3779
3780 /* Shifts of 32 are encoded as 0, for those shifts that
3781 support it. */
3782 if (num == 32)
3783 num = 0;
3784
3785 inst.instruction |= (num << 7) | shift->properties->bit_field;
3786 }
3787 else
3788 {
3789 inst.reloc.type = BFD_RELOC_ARM_SHIFT_IMM;
3790 inst.reloc.pc_rel = 0;
3791 inst.instruction |= shift->properties->bit_field;
3792 }
3793
3794 * str = p;
3795 return SUCCESS;
3796 }
3797
3798 /* Do those data_ops which can take a negative immediate constant
3799 by altering the instuction. A bit of a hack really.
3800 MOV <-> MVN
3801 AND <-> BIC
3802 ADC <-> SBC
3803 by inverting the second operand, and
3804 ADD <-> SUB
3805 CMP <-> CMN
3806 by negating the second operand. */
3807
3808 static int
3809 negate_data_op (instruction, value)
3810 unsigned long * instruction;
3811 unsigned long value;
3812 {
3813 int op, new_inst;
3814 unsigned long negated, inverted;
3815
3816 negated = validate_immediate (-value);
3817 inverted = validate_immediate (~value);
3818
3819 op = (*instruction >> DATA_OP_SHIFT) & 0xf;
3820 switch (op)
3821 {
3822 /* First negates. */
3823 case OPCODE_SUB: /* ADD <-> SUB */
3824 new_inst = OPCODE_ADD;
3825 value = negated;
3826 break;
3827
3828 case OPCODE_ADD:
3829 new_inst = OPCODE_SUB;
3830 value = negated;
3831 break;
3832
3833 case OPCODE_CMP: /* CMP <-> CMN */
3834 new_inst = OPCODE_CMN;
3835 value = negated;
3836 break;
3837
3838 case OPCODE_CMN:
3839 new_inst = OPCODE_CMP;
3840 value = negated;
3841 break;
3842
3843 /* Now Inverted ops. */
3844 case OPCODE_MOV: /* MOV <-> MVN */
3845 new_inst = OPCODE_MVN;
3846 value = inverted;
3847 break;
3848
3849 case OPCODE_MVN:
3850 new_inst = OPCODE_MOV;
3851 value = inverted;
3852 break;
3853
3854 case OPCODE_AND: /* AND <-> BIC */
3855 new_inst = OPCODE_BIC;
3856 value = inverted;
3857 break;
3858
3859 case OPCODE_BIC:
3860 new_inst = OPCODE_AND;
3861 value = inverted;
3862 break;
3863
3864 case OPCODE_ADC: /* ADC <-> SBC */
3865 new_inst = OPCODE_SBC;
3866 value = inverted;
3867 break;
3868
3869 case OPCODE_SBC:
3870 new_inst = OPCODE_ADC;
3871 value = inverted;
3872 break;
3873
3874 /* We cannot do anything. */
3875 default:
3876 return FAIL;
3877 }
3878
3879 if (value == (unsigned) FAIL)
3880 return FAIL;
3881
3882 *instruction &= OPCODE_MASK;
3883 *instruction |= new_inst << DATA_OP_SHIFT;
3884 return value;
3885 }
3886
3887 static int
3888 data_op2 (str)
3889 char ** str;
3890 {
3891 int value;
3892 expressionS expr;
3893
3894 skip_whitespace (* str);
3895
3896 if (reg_required_here (str, 0) != FAIL)
3897 {
3898 if (skip_past_comma (str) == SUCCESS)
3899 /* Shift operation on register. */
3900 return decode_shift (str, NO_SHIFT_RESTRICT);
3901
3902 return SUCCESS;
3903 }
3904 else
3905 {
3906 /* Immediate expression. */
3907 if (is_immediate_prefix (**str))
3908 {
3909 (*str)++;
3910 inst.error = NULL;
3911
3912 if (my_get_expression (&inst.reloc.exp, str))
3913 return FAIL;
3914
3915 if (inst.reloc.exp.X_add_symbol)
3916 {
3917 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
3918 inst.reloc.pc_rel = 0;
3919 }
3920 else
3921 {
3922 if (skip_past_comma (str) == SUCCESS)
3923 {
3924 /* #x, y -- ie explicit rotation by Y. */
3925 if (my_get_expression (&expr, str))
3926 return FAIL;
3927
3928 if (expr.X_op != O_constant)
3929 {
3930 inst.error = _("Constant expression expected");
3931 return FAIL;
3932 }
3933
3934 /* Rotate must be a multiple of 2. */
3935 if (((unsigned) expr.X_add_number) > 30
3936 || (expr.X_add_number & 1) != 0
3937 || ((unsigned) inst.reloc.exp.X_add_number) > 255)
3938 {
3939 inst.error = _("Invalid constant");
3940 return FAIL;
3941 }
3942 inst.instruction |= INST_IMMEDIATE;
3943 inst.instruction |= inst.reloc.exp.X_add_number;
3944 inst.instruction |= expr.X_add_number << 7;
3945 return SUCCESS;
3946 }
3947
3948 /* Implicit rotation, select a suitable one. */
3949 value = validate_immediate (inst.reloc.exp.X_add_number);
3950
3951 if (value == FAIL)
3952 {
3953 /* Can't be done. Perhaps the code reads something like
3954 "add Rd, Rn, #-n", where "sub Rd, Rn, #n" would be OK. */
3955 if ((value = negate_data_op (&inst.instruction,
3956 inst.reloc.exp.X_add_number))
3957 == FAIL)
3958 {
3959 inst.error = _("Invalid constant");
3960 return FAIL;
3961 }
3962 }
3963
3964 inst.instruction |= value;
3965 }
3966
3967 inst.instruction |= INST_IMMEDIATE;
3968 return SUCCESS;
3969 }
3970
3971 (*str)++;
3972 inst.error = _("Register or shift expression expected");
3973 return FAIL;
3974 }
3975 }
3976
3977 static int
3978 fp_op2 (str)
3979 char ** str;
3980 {
3981 skip_whitespace (* str);
3982
3983 if (fp_reg_required_here (str, 0) != FAIL)
3984 return SUCCESS;
3985 else
3986 {
3987 /* Immediate expression. */
3988 if (*((*str)++) == '#')
3989 {
3990 int i;
3991
3992 inst.error = NULL;
3993
3994 skip_whitespace (* str);
3995
3996 /* First try and match exact strings, this is to guarantee
3997 that some formats will work even for cross assembly. */
3998
3999 for (i = 0; fp_const[i]; i++)
4000 {
4001 if (strncmp (*str, fp_const[i], strlen (fp_const[i])) == 0)
4002 {
4003 char *start = *str;
4004
4005 *str += strlen (fp_const[i]);
4006 if (is_end_of_line[(unsigned char) **str])
4007 {
4008 inst.instruction |= i + 8;
4009 return SUCCESS;
4010 }
4011 *str = start;
4012 }
4013 }
4014
4015 /* Just because we didn't get a match doesn't mean that the
4016 constant isn't valid, just that it is in a format that we
4017 don't automatically recognize. Try parsing it with
4018 the standard expression routines. */
4019 if ((i = my_get_float_expression (str)) >= 0)
4020 {
4021 inst.instruction |= i + 8;
4022 return SUCCESS;
4023 }
4024
4025 inst.error = _("Invalid floating point immediate expression");
4026 return FAIL;
4027 }
4028 inst.error =
4029 _("Floating point register or immediate expression expected");
4030 return FAIL;
4031 }
4032 }
4033
4034 static void
4035 do_arit (str, flags)
4036 char * str;
4037 unsigned long flags;
4038 {
4039 skip_whitespace (str);
4040
4041 if (reg_required_here (&str, 12) == FAIL
4042 || skip_past_comma (&str) == FAIL
4043 || reg_required_here (&str, 16) == FAIL
4044 || skip_past_comma (&str) == FAIL
4045 || data_op2 (&str) == FAIL)
4046 {
4047 if (!inst.error)
4048 inst.error = BAD_ARGS;
4049 return;
4050 }
4051
4052 inst.instruction |= flags;
4053 end_of_line (str);
4054 return;
4055 }
4056
4057 static void
4058 do_adr (str, flags)
4059 char * str;
4060 unsigned long flags;
4061 {
4062 /* This is a pseudo-op of the form "adr rd, label" to be converted
4063 into a relative address of the form "add rd, pc, #label-.-8". */
4064 skip_whitespace (str);
4065
4066 if (reg_required_here (&str, 12) == FAIL
4067 || skip_past_comma (&str) == FAIL
4068 || my_get_expression (&inst.reloc.exp, &str))
4069 {
4070 if (!inst.error)
4071 inst.error = BAD_ARGS;
4072 return;
4073 }
4074
4075 /* Frag hacking will turn this into a sub instruction if the offset turns
4076 out to be negative. */
4077 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
4078 inst.reloc.exp.X_add_number -= 8; /* PC relative adjust. */
4079 inst.reloc.pc_rel = 1;
4080 inst.instruction |= flags;
4081
4082 end_of_line (str);
4083 }
4084
4085 static void
4086 do_adrl (str, flags)
4087 char * str;
4088 unsigned long flags;
4089 {
4090 /* This is a pseudo-op of the form "adrl rd, label" to be converted
4091 into a relative address of the form:
4092 add rd, pc, #low(label-.-8)"
4093 add rd, rd, #high(label-.-8)" */
4094
4095 skip_whitespace (str);
4096
4097 if (reg_required_here (& str, 12) == FAIL
4098 || skip_past_comma (& str) == FAIL
4099 || my_get_expression (& inst.reloc.exp, & str))
4100 {
4101 if (!inst.error)
4102 inst.error = BAD_ARGS;
4103 return;
4104 }
4105
4106 end_of_line (str);
4107
4108 /* Frag hacking will turn this into a sub instruction if the offset turns
4109 out to be negative. */
4110 inst.reloc.type = BFD_RELOC_ARM_ADRL_IMMEDIATE;
4111 inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */
4112 inst.reloc.pc_rel = 1;
4113 inst.instruction |= flags;
4114 inst.size = INSN_SIZE * 2;
4115
4116 return;
4117 }
4118
4119 static void
4120 do_cmp (str, flags)
4121 char * str;
4122 unsigned long flags;
4123 {
4124 skip_whitespace (str);
4125
4126 if (reg_required_here (&str, 16) == FAIL)
4127 {
4128 if (!inst.error)
4129 inst.error = BAD_ARGS;
4130 return;
4131 }
4132
4133 if (skip_past_comma (&str) == FAIL
4134 || data_op2 (&str) == FAIL)
4135 {
4136 if (!inst.error)
4137 inst.error = BAD_ARGS;
4138 return;
4139 }
4140
4141 inst.instruction |= flags;
4142 if ((flags & 0x0000f000) == 0)
4143 inst.instruction |= CONDS_BIT;
4144
4145 end_of_line (str);
4146 return;
4147 }
4148
4149 static void
4150 do_mov (str, flags)
4151 char * str;
4152 unsigned long flags;
4153 {
4154 skip_whitespace (str);
4155
4156 if (reg_required_here (&str, 12) == FAIL)
4157 {
4158 if (!inst.error)
4159 inst.error = BAD_ARGS;
4160 return;
4161 }
4162
4163 if (skip_past_comma (&str) == FAIL
4164 || data_op2 (&str) == FAIL)
4165 {
4166 if (!inst.error)
4167 inst.error = BAD_ARGS;
4168 return;
4169 }
4170
4171 inst.instruction |= flags;
4172 end_of_line (str);
4173 return;
4174 }
4175
4176 static int
4177 ldst_extend (str, hwse)
4178 char ** str;
4179 int hwse;
4180 {
4181 int add = INDEX_UP;
4182
4183 switch (**str)
4184 {
4185 case '#':
4186 case '$':
4187 (*str)++;
4188 if (my_get_expression (& inst.reloc.exp, str))
4189 return FAIL;
4190
4191 if (inst.reloc.exp.X_op == O_constant)
4192 {
4193 int value = inst.reloc.exp.X_add_number;
4194
4195 if ((hwse && (value < -255 || value > 255))
4196 || (value < -4095 || value > 4095))
4197 {
4198 inst.error = _("address offset too large");
4199 return FAIL;
4200 }
4201
4202 if (value < 0)
4203 {
4204 value = -value;
4205 add = 0;
4206 }
4207
4208 /* Halfword and signextension instructions have the
4209 immediate value split across bits 11..8 and bits 3..0. */
4210 if (hwse)
4211 inst.instruction |= (add | HWOFFSET_IMM
4212 | ((value >> 4) << 8) | (value & 0xF));
4213 else
4214 inst.instruction |= add | value;
4215 }
4216 else
4217 {
4218 if (hwse)
4219 {
4220 inst.instruction |= HWOFFSET_IMM;
4221 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
4222 }
4223 else
4224 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM;
4225 inst.reloc.pc_rel = 0;
4226 }
4227 return SUCCESS;
4228
4229 case '-':
4230 add = 0;
4231 /* Fall through. */
4232
4233 case '+':
4234 (*str)++;
4235 /* Fall through. */
4236
4237 default:
4238 if (reg_required_here (str, 0) == FAIL)
4239 return FAIL;
4240
4241 if (hwse)
4242 inst.instruction |= add;
4243 else
4244 {
4245 inst.instruction |= add | OFFSET_REG;
4246 if (skip_past_comma (str) == SUCCESS)
4247 return decode_shift (str, SHIFT_RESTRICT);
4248 }
4249
4250 return SUCCESS;
4251 }
4252 }
4253
4254 static void
4255 do_ldst (str, flags)
4256 char * str;
4257 unsigned long flags;
4258 {
4259 int halfword = 0;
4260 int pre_inc = 0;
4261 int conflict_reg;
4262 int value;
4263
4264 /* This is not ideal, but it is the simplest way of dealing with the
4265 ARM7T halfword instructions (since they use a different
4266 encoding, but the same mnemonic): */
4267 halfword = (flags & 0x80000000) != 0;
4268 if (halfword)
4269 {
4270 /* This is actually a load/store of a halfword, or a
4271 signed-extension load. */
4272 if ((cpu_variant & ARM_EXT_HALFWORD) == 0)
4273 {
4274 inst.error
4275 = _("Processor does not support halfwords or signed bytes");
4276 return;
4277 }
4278
4279 inst.instruction = ((inst.instruction & COND_MASK)
4280 | (flags & ~COND_MASK));
4281
4282 flags = 0;
4283 }
4284
4285 skip_whitespace (str);
4286
4287 if ((conflict_reg = reg_required_here (& str, 12)) == FAIL)
4288 {
4289 if (!inst.error)
4290 inst.error = BAD_ARGS;
4291 return;
4292 }
4293
4294 if (skip_past_comma (& str) == FAIL)
4295 {
4296 inst.error = _("Address expected");
4297 return;
4298 }
4299
4300 if (*str == '[')
4301 {
4302 int reg;
4303
4304 str++;
4305
4306 skip_whitespace (str);
4307
4308 if ((reg = reg_required_here (&str, 16)) == FAIL)
4309 return;
4310
4311 /* Conflicts can occur on stores as well as loads. */
4312 conflict_reg = (conflict_reg == reg);
4313
4314 skip_whitespace (str);
4315
4316 if (*str == ']')
4317 {
4318 str ++;
4319
4320 if (skip_past_comma (&str) == SUCCESS)
4321 {
4322 /* [Rn],... (post inc) */
4323 if (ldst_extend (&str, halfword) == FAIL)
4324 return;
4325 if (conflict_reg)
4326 {
4327 if (flags & TRANS_BIT)
4328 as_warn (_("Rn and Rd must be different in %s"),
4329 ((inst.instruction & LOAD_BIT)
4330 ? "LDRT" : "STRT"));
4331 else
4332 as_warn (_("%s register same as write-back base"),
4333 ((inst.instruction & LOAD_BIT)
4334 ? _("destination") : _("source")));
4335 }
4336 }
4337 else
4338 {
4339 /* [Rn] */
4340 if (halfword)
4341 inst.instruction |= HWOFFSET_IMM;
4342
4343 skip_whitespace (str);
4344
4345 if (*str == '!')
4346 {
4347 if (conflict_reg)
4348 as_warn (_("%s register same as write-back base"),
4349 ((inst.instruction & LOAD_BIT)
4350 ? _("destination") : _("source")));
4351 str++;
4352 inst.instruction |= WRITE_BACK;
4353 }
4354
4355 flags |= INDEX_UP;
4356 if (flags & TRANS_BIT)
4357 {
4358 if (conflict_reg)
4359 as_warn (_("Rn and Rd must be different in %s"),
4360 ((inst.instruction & LOAD_BIT)
4361 ? "LDRT" : "STRT"));
4362 }
4363 else
4364 pre_inc = 1;
4365 }
4366 }
4367 else
4368 {
4369 /* [Rn,...] */
4370 if (skip_past_comma (&str) == FAIL)
4371 {
4372 inst.error = _("pre-indexed expression expected");
4373 return;
4374 }
4375
4376 pre_inc = 1;
4377 if (ldst_extend (&str, halfword) == FAIL)
4378 return;
4379
4380 skip_whitespace (str);
4381
4382 if (*str++ != ']')
4383 {
4384 inst.error = _("missing ]");
4385 return;
4386 }
4387
4388 skip_whitespace (str);
4389
4390 if (*str == '!')
4391 {
4392 if (conflict_reg)
4393 as_warn (_("%s register same as write-back base"),
4394 ((inst.instruction & LOAD_BIT)
4395 ? _("destination") : _("source")));
4396 str++;
4397 inst.instruction |= WRITE_BACK;
4398 }
4399 }
4400 }
4401 else if (*str == '=')
4402 {
4403 /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op. */
4404 str++;
4405
4406 skip_whitespace (str);
4407
4408 if (my_get_expression (&inst.reloc.exp, &str))
4409 return;
4410
4411 if (inst.reloc.exp.X_op != O_constant
4412 && inst.reloc.exp.X_op != O_symbol)
4413 {
4414 inst.error = _("Constant expression expected");
4415 return;
4416 }
4417
4418 if (inst.reloc.exp.X_op == O_constant
4419 && (value = validate_immediate (inst.reloc.exp.X_add_number)) != FAIL)
4420 {
4421 /* This can be done with a mov instruction. */
4422 inst.instruction &= LITERAL_MASK;
4423 inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT);
4424 inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
4425 end_of_line (str);
4426 return;
4427 }
4428 else
4429 {
4430 /* Insert into literal pool. */
4431 if (add_to_lit_pool () == FAIL)
4432 {
4433 if (!inst.error)
4434 inst.error = _("literal pool insertion failed");
4435 return;
4436 }
4437
4438 /* Change the instruction exp to point to the pool. */
4439 if (halfword)
4440 {
4441 inst.instruction |= HWOFFSET_IMM;
4442 inst.reloc.type = BFD_RELOC_ARM_HWLITERAL;
4443 }
4444 else
4445 inst.reloc.type = BFD_RELOC_ARM_LITERAL;
4446 inst.reloc.pc_rel = 1;
4447 inst.instruction |= (REG_PC << 16);
4448 pre_inc = 1;
4449 }
4450 }
4451 else
4452 {
4453 if (my_get_expression (&inst.reloc.exp, &str))
4454 return;
4455
4456 if (halfword)
4457 {
4458 inst.instruction |= HWOFFSET_IMM;
4459 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
4460 }
4461 else
4462 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM;
4463 #ifndef TE_WINCE
4464 /* PC rel adjust. */
4465 inst.reloc.exp.X_add_number -= 8;
4466 #endif
4467 inst.reloc.pc_rel = 1;
4468 inst.instruction |= (REG_PC << 16);
4469 pre_inc = 1;
4470 }
4471
4472 if (pre_inc && (flags & TRANS_BIT))
4473 inst.error = _("Pre-increment instruction with translate");
4474
4475 inst.instruction |= flags | (pre_inc ? PRE_INDEX : 0);
4476 end_of_line (str);
4477 return;
4478 }
4479
4480 static long
4481 reg_list (strp)
4482 char ** strp;
4483 {
4484 char * str = * strp;
4485 long range = 0;
4486 int another_range;
4487
4488 /* We come back here if we get ranges concatenated by '+' or '|'. */
4489 do
4490 {
4491 another_range = 0;
4492
4493 if (*str == '{')
4494 {
4495 int in_range = 0;
4496 int cur_reg = -1;
4497
4498 str++;
4499 do
4500 {
4501 int reg;
4502
4503 skip_whitespace (str);
4504
4505 if ((reg = reg_required_here (& str, -1)) == FAIL)
4506 return FAIL;
4507
4508 if (in_range)
4509 {
4510 int i;
4511
4512 if (reg <= cur_reg)
4513 {
4514 inst.error = _("Bad range in register list");
4515 return FAIL;
4516 }
4517
4518 for (i = cur_reg + 1; i < reg; i++)
4519 {
4520 if (range & (1 << i))
4521 as_tsktsk
4522 (_("Warning: Duplicated register (r%d) in register list"),
4523 i);
4524 else
4525 range |= 1 << i;
4526 }
4527 in_range = 0;
4528 }
4529
4530 if (range & (1 << reg))
4531 as_tsktsk (_("Warning: Duplicated register (r%d) in register list"),
4532 reg);
4533 else if (reg <= cur_reg)
4534 as_tsktsk (_("Warning: Register range not in ascending order"));
4535
4536 range |= 1 << reg;
4537 cur_reg = reg;
4538 }
4539 while (skip_past_comma (&str) != FAIL
4540 || (in_range = 1, *str++ == '-'));
4541 str--;
4542 skip_whitespace (str);
4543
4544 if (*str++ != '}')
4545 {
4546 inst.error = _("Missing `}'");
4547 return FAIL;
4548 }
4549 }
4550 else
4551 {
4552 expressionS expr;
4553
4554 if (my_get_expression (&expr, &str))
4555 return FAIL;
4556
4557 if (expr.X_op == O_constant)
4558 {
4559 if (expr.X_add_number
4560 != (expr.X_add_number & 0x0000ffff))
4561 {
4562 inst.error = _("invalid register mask");
4563 return FAIL;
4564 }
4565
4566 if ((range & expr.X_add_number) != 0)
4567 {
4568 int regno = range & expr.X_add_number;
4569
4570 regno &= -regno;
4571 regno = (1 << regno) - 1;
4572 as_tsktsk
4573 (_("Warning: Duplicated register (r%d) in register list"),
4574 regno);
4575 }
4576
4577 range |= expr.X_add_number;
4578 }
4579 else
4580 {
4581 if (inst.reloc.type != 0)
4582 {
4583 inst.error = _("expression too complex");
4584 return FAIL;
4585 }
4586
4587 memcpy (&inst.reloc.exp, &expr, sizeof (expressionS));
4588 inst.reloc.type = BFD_RELOC_ARM_MULTI;
4589 inst.reloc.pc_rel = 0;
4590 }
4591 }
4592
4593 skip_whitespace (str);
4594
4595 if (*str == '|' || *str == '+')
4596 {
4597 str++;
4598 another_range = 1;
4599 }
4600 }
4601 while (another_range);
4602
4603 *strp = str;
4604 return range;
4605 }
4606
4607 static void
4608 do_ldmstm (str, flags)
4609 char * str;
4610 unsigned long flags;
4611 {
4612 int base_reg;
4613 long range;
4614
4615 skip_whitespace (str);
4616
4617 if ((base_reg = reg_required_here (&str, 16)) == FAIL)
4618 return;
4619
4620 if (base_reg == REG_PC)
4621 {
4622 inst.error = _("r15 not allowed as base register");
4623 return;
4624 }
4625
4626 skip_whitespace (str);
4627
4628 if (*str == '!')
4629 {
4630 flags |= WRITE_BACK;
4631 str++;
4632 }
4633
4634 if (skip_past_comma (&str) == FAIL
4635 || (range = reg_list (&str)) == FAIL)
4636 {
4637 if (! inst.error)
4638 inst.error = BAD_ARGS;
4639 return;
4640 }
4641
4642 if (*str == '^')
4643 {
4644 str++;
4645 flags |= LDM_TYPE_2_OR_3;
4646 }
4647
4648 inst.instruction |= flags | range;
4649 end_of_line (str);
4650 return;
4651 }
4652
4653 static void
4654 do_swi (str, flags)
4655 char * str;
4656 unsigned long flags;
4657 {
4658 skip_whitespace (str);
4659
4660 /* Allow optional leading '#'. */
4661 if (is_immediate_prefix (*str))
4662 str++;
4663
4664 if (my_get_expression (& inst.reloc.exp, & str))
4665 return;
4666
4667 inst.reloc.type = BFD_RELOC_ARM_SWI;
4668 inst.reloc.pc_rel = 0;
4669 inst.instruction |= flags;
4670
4671 end_of_line (str);
4672
4673 return;
4674 }
4675
4676 static void
4677 do_swap (str, flags)
4678 char * str;
4679 unsigned long flags;
4680 {
4681 int reg;
4682
4683 skip_whitespace (str);
4684
4685 if ((reg = reg_required_here (&str, 12)) == FAIL)
4686 return;
4687
4688 if (reg == REG_PC)
4689 {
4690 inst.error = _("r15 not allowed in swap");
4691 return;
4692 }
4693
4694 if (skip_past_comma (&str) == FAIL
4695 || (reg = reg_required_here (&str, 0)) == FAIL)
4696 {
4697 if (!inst.error)
4698 inst.error = BAD_ARGS;
4699 return;
4700 }
4701
4702 if (reg == REG_PC)
4703 {
4704 inst.error = _("r15 not allowed in swap");
4705 return;
4706 }
4707
4708 if (skip_past_comma (&str) == FAIL
4709 || *str++ != '[')
4710 {
4711 inst.error = BAD_ARGS;
4712 return;
4713 }
4714
4715 skip_whitespace (str);
4716
4717 if ((reg = reg_required_here (&str, 16)) == FAIL)
4718 return;
4719
4720 if (reg == REG_PC)
4721 {
4722 inst.error = BAD_PC;
4723 return;
4724 }
4725
4726 skip_whitespace (str);
4727
4728 if (*str++ != ']')
4729 {
4730 inst.error = _("missing ]");
4731 return;
4732 }
4733
4734 inst.instruction |= flags;
4735 end_of_line (str);
4736 return;
4737 }
4738
4739 static void
4740 do_branch (str, flags)
4741 char * str;
4742 unsigned long flags ATTRIBUTE_UNUSED;
4743 {
4744 if (my_get_expression (&inst.reloc.exp, &str))
4745 return;
4746
4747 #ifdef OBJ_ELF
4748 {
4749 char * save_in;
4750
4751 /* ScottB: February 5, 1998 - Check to see of PLT32 reloc
4752 required for the instruction. */
4753
4754 /* arm_parse_reloc () works on input_line_pointer.
4755 We actually want to parse the operands to the branch instruction
4756 passed in 'str'. Save the input pointer and restore it later. */
4757 save_in = input_line_pointer;
4758 input_line_pointer = str;
4759 if (inst.reloc.exp.X_op == O_symbol
4760 && *str == '('
4761 && arm_parse_reloc () == BFD_RELOC_ARM_PLT32)
4762 {
4763 inst.reloc.type = BFD_RELOC_ARM_PLT32;
4764 inst.reloc.pc_rel = 0;
4765 /* Modify str to point to after parsed operands, otherwise
4766 end_of_line() will complain about the (PLT) left in str. */
4767 str = input_line_pointer;
4768 }
4769 else
4770 {
4771 inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH;
4772 inst.reloc.pc_rel = 1;
4773 }
4774 input_line_pointer = save_in;
4775 }
4776 #else
4777 inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH;
4778 inst.reloc.pc_rel = 1;
4779 #endif /* OBJ_ELF */
4780
4781 end_of_line (str);
4782 return;
4783 }
4784
4785 static void
4786 do_bx (str, flags)
4787 char * str;
4788 unsigned long flags ATTRIBUTE_UNUSED;
4789 {
4790 int reg;
4791
4792 skip_whitespace (str);
4793
4794 if ((reg = reg_required_here (&str, 0)) == FAIL)
4795 {
4796 inst.error = BAD_ARGS;
4797 return;
4798 }
4799
4800 /* Note - it is not illegal to do a "bx pc". Useless, but not illegal. */
4801 if (reg == REG_PC)
4802 as_tsktsk (_("Use of r15 in bx in ARM mode is not really useful"));
4803
4804 end_of_line (str);
4805 }
4806
4807 static void
4808 do_cdp (str, flags)
4809 char * str;
4810 unsigned long flags ATTRIBUTE_UNUSED;
4811 {
4812 /* Co-processor data operation.
4813 Format: CDP{cond} CP#,<expr>,CRd,CRn,CRm{,<expr>} */
4814 skip_whitespace (str);
4815
4816 if (co_proc_number (&str) == FAIL)
4817 {
4818 if (!inst.error)
4819 inst.error = BAD_ARGS;
4820 return;
4821 }
4822
4823 if (skip_past_comma (&str) == FAIL
4824 || cp_opc_expr (&str, 20,4) == FAIL)
4825 {
4826 if (!inst.error)
4827 inst.error = BAD_ARGS;
4828 return;
4829 }
4830
4831 if (skip_past_comma (&str) == FAIL
4832 || cp_reg_required_here (&str, 12) == FAIL)
4833 {
4834 if (!inst.error)
4835 inst.error = BAD_ARGS;
4836 return;
4837 }
4838
4839 if (skip_past_comma (&str) == FAIL
4840 || cp_reg_required_here (&str, 16) == FAIL)
4841 {
4842 if (!inst.error)
4843 inst.error = BAD_ARGS;
4844 return;
4845 }
4846
4847 if (skip_past_comma (&str) == FAIL
4848 || cp_reg_required_here (&str, 0) == FAIL)
4849 {
4850 if (!inst.error)
4851 inst.error = BAD_ARGS;
4852 return;
4853 }
4854
4855 if (skip_past_comma (&str) == SUCCESS)
4856 {
4857 if (cp_opc_expr (&str, 5, 3) == FAIL)
4858 {
4859 if (!inst.error)
4860 inst.error = BAD_ARGS;
4861 return;
4862 }
4863 }
4864
4865 end_of_line (str);
4866 return;
4867 }
4868
4869 static void
4870 do_lstc (str, flags)
4871 char * str;
4872 unsigned long flags;
4873 {
4874 /* Co-processor register load/store.
4875 Format: <LDC|STC{cond}[L] CP#,CRd,<address> */
4876
4877 skip_whitespace (str);
4878
4879 if (co_proc_number (&str) == FAIL)
4880 {
4881 if (!inst.error)
4882 inst.error = BAD_ARGS;
4883 return;
4884 }
4885
4886 if (skip_past_comma (&str) == FAIL
4887 || cp_reg_required_here (&str, 12) == FAIL)
4888 {
4889 if (!inst.error)
4890 inst.error = BAD_ARGS;
4891 return;
4892 }
4893
4894 if (skip_past_comma (&str) == FAIL
4895 || cp_address_required_here (&str) == FAIL)
4896 {
4897 if (! inst.error)
4898 inst.error = BAD_ARGS;
4899 return;
4900 }
4901
4902 inst.instruction |= flags;
4903 end_of_line (str);
4904 return;
4905 }
4906
4907 static void
4908 do_co_reg (str, flags)
4909 char * str;
4910 unsigned long flags;
4911 {
4912 /* Co-processor register transfer.
4913 Format: <MCR|MRC>{cond} CP#,<expr1>,Rd,CRn,CRm{,<expr2>} */
4914
4915 skip_whitespace (str);
4916
4917 if (co_proc_number (&str) == FAIL)
4918 {
4919 if (!inst.error)
4920 inst.error = BAD_ARGS;
4921 return;
4922 }
4923
4924 if (skip_past_comma (&str) == FAIL
4925 || cp_opc_expr (&str, 21, 3) == FAIL)
4926 {
4927 if (!inst.error)
4928 inst.error = BAD_ARGS;
4929 return;
4930 }
4931
4932 if (skip_past_comma (&str) == FAIL
4933 || reg_required_here (&str, 12) == FAIL)
4934 {
4935 if (!inst.error)
4936 inst.error = BAD_ARGS;
4937 return;
4938 }
4939
4940 if (skip_past_comma (&str) == FAIL
4941 || cp_reg_required_here (&str, 16) == FAIL)
4942 {
4943 if (!inst.error)
4944 inst.error = BAD_ARGS;
4945 return;
4946 }
4947
4948 if (skip_past_comma (&str) == FAIL
4949 || cp_reg_required_here (&str, 0) == FAIL)
4950 {
4951 if (!inst.error)
4952 inst.error = BAD_ARGS;
4953 return;
4954 }
4955
4956 if (skip_past_comma (&str) == SUCCESS)
4957 {
4958 if (cp_opc_expr (&str, 5, 3) == FAIL)
4959 {
4960 if (!inst.error)
4961 inst.error = BAD_ARGS;
4962 return;
4963 }
4964 }
4965 if (flags)
4966 {
4967 inst.error = BAD_COND;
4968 }
4969
4970 end_of_line (str);
4971 return;
4972 }
4973
4974 static void
4975 do_fp_ctrl (str, flags)
4976 char * str;
4977 unsigned long flags ATTRIBUTE_UNUSED;
4978 {
4979 /* FP control registers.
4980 Format: <WFS|RFS|WFC|RFC>{cond} Rn */
4981
4982 skip_whitespace (str);
4983
4984 if (reg_required_here (&str, 12) == FAIL)
4985 {
4986 if (!inst.error)
4987 inst.error = BAD_ARGS;
4988 return;
4989 }
4990
4991 end_of_line (str);
4992 return;
4993 }
4994
4995 static void
4996 do_fp_ldst (str, flags)
4997 char * str;
4998 unsigned long flags ATTRIBUTE_UNUSED;
4999 {
5000 skip_whitespace (str);
5001
5002 switch (inst.suffix)
5003 {
5004 case SUFF_S:
5005 break;
5006 case SUFF_D:
5007 inst.instruction |= CP_T_X;
5008 break;
5009 case SUFF_E:
5010 inst.instruction |= CP_T_Y;
5011 break;
5012 case SUFF_P:
5013 inst.instruction |= CP_T_X | CP_T_Y;
5014 break;
5015 default:
5016 abort ();
5017 }
5018
5019 if (fp_reg_required_here (&str, 12) == FAIL)
5020 {
5021 if (!inst.error)
5022 inst.error = BAD_ARGS;
5023 return;
5024 }
5025
5026 if (skip_past_comma (&str) == FAIL
5027 || cp_address_required_here (&str) == FAIL)
5028 {
5029 if (!inst.error)
5030 inst.error = BAD_ARGS;
5031 return;
5032 }
5033
5034 end_of_line (str);
5035 }
5036
5037 static void
5038 do_fp_ldmstm (str, flags)
5039 char * str;
5040 unsigned long flags;
5041 {
5042 int num_regs;
5043
5044 skip_whitespace (str);
5045
5046 if (fp_reg_required_here (&str, 12) == FAIL)
5047 {
5048 if (! inst.error)
5049 inst.error = BAD_ARGS;
5050 return;
5051 }
5052
5053 /* Get Number of registers to transfer. */
5054 if (skip_past_comma (&str) == FAIL
5055 || my_get_expression (&inst.reloc.exp, &str))
5056 {
5057 if (! inst.error)
5058 inst.error = _("constant expression expected");
5059 return;
5060 }
5061
5062 if (inst.reloc.exp.X_op != O_constant)
5063 {
5064 inst.error = _("Constant value required for number of registers");
5065 return;
5066 }
5067
5068 num_regs = inst.reloc.exp.X_add_number;
5069
5070 if (num_regs < 1 || num_regs > 4)
5071 {
5072 inst.error = _("number of registers must be in the range [1:4]");
5073 return;
5074 }
5075
5076 switch (num_regs)
5077 {
5078 case 1:
5079 inst.instruction |= CP_T_X;
5080 break;
5081 case 2:
5082 inst.instruction |= CP_T_Y;
5083 break;
5084 case 3:
5085 inst.instruction |= CP_T_Y | CP_T_X;
5086 break;
5087 case 4:
5088 break;
5089 default:
5090 abort ();
5091 }
5092
5093 if (flags)
5094 {
5095 int reg;
5096 int write_back;
5097 int offset;
5098
5099 /* The instruction specified "ea" or "fd", so we can only accept
5100 [Rn]{!}. The instruction does not really support stacking or
5101 unstacking, so we have to emulate these by setting appropriate
5102 bits and offsets. */
5103 if (skip_past_comma (&str) == FAIL
5104 || *str != '[')
5105 {
5106 if (! inst.error)
5107 inst.error = BAD_ARGS;
5108 return;
5109 }
5110
5111 str++;
5112 skip_whitespace (str);
5113
5114 if ((reg = reg_required_here (&str, 16)) == FAIL)
5115 return;
5116
5117 skip_whitespace (str);
5118
5119 if (*str != ']')
5120 {
5121 inst.error = BAD_ARGS;
5122 return;
5123 }
5124
5125 str++;
5126 if (*str == '!')
5127 {
5128 write_back = 1;
5129 str++;
5130 if (reg == REG_PC)
5131 {
5132 inst.error =
5133 _("R15 not allowed as base register with write-back");
5134 return;
5135 }
5136 }
5137 else
5138 write_back = 0;
5139
5140 if (flags & CP_T_Pre)
5141 {
5142 /* Pre-decrement. */
5143 offset = 3 * num_regs;
5144 if (write_back)
5145 flags |= CP_T_WB;
5146 }
5147 else
5148 {
5149 /* Post-increment. */
5150 if (write_back)
5151 {
5152 flags |= CP_T_WB;
5153 offset = 3 * num_regs;
5154 }
5155 else
5156 {
5157 /* No write-back, so convert this into a standard pre-increment
5158 instruction -- aesthetically more pleasing. */
5159 flags = CP_T_Pre | CP_T_UD;
5160 offset = 0;
5161 }
5162 }
5163
5164 inst.instruction |= flags | offset;
5165 }
5166 else if (skip_past_comma (&str) == FAIL
5167 || cp_address_required_here (&str) == FAIL)
5168 {
5169 if (! inst.error)
5170 inst.error = BAD_ARGS;
5171 return;
5172 }
5173
5174 end_of_line (str);
5175 }
5176
5177 static void
5178 do_fp_dyadic (str, flags)
5179 char * str;
5180 unsigned long flags;
5181 {
5182 skip_whitespace (str);
5183
5184 switch (inst.suffix)
5185 {
5186 case SUFF_S:
5187 break;
5188 case SUFF_D:
5189 inst.instruction |= 0x00000080;
5190 break;
5191 case SUFF_E:
5192 inst.instruction |= 0x00080000;
5193 break;
5194 default:
5195 abort ();
5196 }
5197
5198 if (fp_reg_required_here (&str, 12) == FAIL)
5199 {
5200 if (! inst.error)
5201 inst.error = BAD_ARGS;
5202 return;
5203 }
5204
5205 if (skip_past_comma (&str) == FAIL
5206 || fp_reg_required_here (&str, 16) == FAIL)
5207 {
5208 if (! inst.error)
5209 inst.error = BAD_ARGS;
5210 return;
5211 }
5212
5213 if (skip_past_comma (&str) == FAIL
5214 || fp_op2 (&str) == FAIL)
5215 {
5216 if (! inst.error)
5217 inst.error = BAD_ARGS;
5218 return;
5219 }
5220
5221 inst.instruction |= flags;
5222 end_of_line (str);
5223 return;
5224 }
5225
5226 static void
5227 do_fp_monadic (str, flags)
5228 char * str;
5229 unsigned long flags;
5230 {
5231 skip_whitespace (str);
5232
5233 switch (inst.suffix)
5234 {
5235 case SUFF_S:
5236 break;
5237 case SUFF_D:
5238 inst.instruction |= 0x00000080;
5239 break;
5240 case SUFF_E:
5241 inst.instruction |= 0x00080000;
5242 break;
5243 default:
5244 abort ();
5245 }
5246
5247 if (fp_reg_required_here (&str, 12) == FAIL)
5248 {
5249 if (! inst.error)
5250 inst.error = BAD_ARGS;
5251 return;
5252 }
5253
5254 if (skip_past_comma (&str) == FAIL
5255 || fp_op2 (&str) == FAIL)
5256 {
5257 if (! inst.error)
5258 inst.error = BAD_ARGS;
5259 return;
5260 }
5261
5262 inst.instruction |= flags;
5263 end_of_line (str);
5264 return;
5265 }
5266
5267 static void
5268 do_fp_cmp (str, flags)
5269 char * str;
5270 unsigned long flags;
5271 {
5272 skip_whitespace (str);
5273
5274 if (fp_reg_required_here (&str, 16) == FAIL)
5275 {
5276 if (! inst.error)
5277 inst.error = BAD_ARGS;
5278 return;
5279 }
5280
5281 if (skip_past_comma (&str) == FAIL
5282 || fp_op2 (&str) == FAIL)
5283 {
5284 if (! inst.error)
5285 inst.error = BAD_ARGS;
5286 return;
5287 }
5288
5289 inst.instruction |= flags;
5290 end_of_line (str);
5291 return;
5292 }
5293
5294 static void
5295 do_fp_from_reg (str, flags)
5296 char * str;
5297 unsigned long flags;
5298 {
5299 skip_whitespace (str);
5300
5301 switch (inst.suffix)
5302 {
5303 case SUFF_S:
5304 break;
5305 case SUFF_D:
5306 inst.instruction |= 0x00000080;
5307 break;
5308 case SUFF_E:
5309 inst.instruction |= 0x00080000;
5310 break;
5311 default:
5312 abort ();
5313 }
5314
5315 if (fp_reg_required_here (&str, 16) == FAIL)
5316 {
5317 if (! inst.error)
5318 inst.error = BAD_ARGS;
5319 return;
5320 }
5321
5322 if (skip_past_comma (&str) == FAIL
5323 || reg_required_here (&str, 12) == FAIL)
5324 {
5325 if (! inst.error)
5326 inst.error = BAD_ARGS;
5327 return;
5328 }
5329
5330 inst.instruction |= flags;
5331 end_of_line (str);
5332 return;
5333 }
5334
5335 static void
5336 do_fp_to_reg (str, flags)
5337 char * str;
5338 unsigned long flags;
5339 {
5340 skip_whitespace (str);
5341
5342 if (reg_required_here (&str, 12) == FAIL)
5343 return;
5344
5345 if (skip_past_comma (&str) == FAIL
5346 || fp_reg_required_here (&str, 0) == FAIL)
5347 {
5348 if (! inst.error)
5349 inst.error = BAD_ARGS;
5350 return;
5351 }
5352
5353 inst.instruction |= flags;
5354 end_of_line (str);
5355 return;
5356 }
5357
5358 /* Thumb specific routines. */
5359
5360 /* Parse and validate that a register is of the right form, this saves
5361 repeated checking of this information in many similar cases.
5362 Unlike the 32-bit case we do not insert the register into the opcode
5363 here, since the position is often unknown until the full instruction
5364 has been parsed. */
5365
5366 static int
5367 thumb_reg (strp, hi_lo)
5368 char ** strp;
5369 int hi_lo;
5370 {
5371 int reg;
5372
5373 if ((reg = reg_required_here (strp, -1)) == FAIL)
5374 return FAIL;
5375
5376 switch (hi_lo)
5377 {
5378 case THUMB_REG_LO:
5379 if (reg > 7)
5380 {
5381 inst.error = _("lo register required");
5382 return FAIL;
5383 }
5384 break;
5385
5386 case THUMB_REG_HI:
5387 if (reg < 8)
5388 {
5389 inst.error = _("hi register required");
5390 return FAIL;
5391 }
5392 break;
5393
5394 default:
5395 break;
5396 }
5397
5398 return reg;
5399 }
5400
5401 /* Parse an add or subtract instruction, SUBTRACT is non-zero if the opcode
5402 was SUB. */
5403
5404 static void
5405 thumb_add_sub (str, subtract)
5406 char * str;
5407 int subtract;
5408 {
5409 int Rd, Rs, Rn = FAIL;
5410
5411 skip_whitespace (str);
5412
5413 if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL
5414 || skip_past_comma (&str) == FAIL)
5415 {
5416 if (! inst.error)
5417 inst.error = BAD_ARGS;
5418 return;
5419 }
5420
5421 if (is_immediate_prefix (*str))
5422 {
5423 Rs = Rd;
5424 str++;
5425 if (my_get_expression (&inst.reloc.exp, &str))
5426 return;
5427 }
5428 else
5429 {
5430 if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5431 return;
5432
5433 if (skip_past_comma (&str) == FAIL)
5434 {
5435 /* Two operand format, shuffle the registers
5436 and pretend there are 3. */
5437 Rn = Rs;
5438 Rs = Rd;
5439 }
5440 else if (is_immediate_prefix (*str))
5441 {
5442 str++;
5443 if (my_get_expression (&inst.reloc.exp, &str))
5444 return;
5445 }
5446 else if ((Rn = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5447 return;
5448 }
5449
5450 /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL;
5451 for the latter case, EXPR contains the immediate that was found. */
5452 if (Rn != FAIL)
5453 {
5454 /* All register format. */
5455 if (Rd > 7 || Rs > 7 || Rn > 7)
5456 {
5457 if (Rs != Rd)
5458 {
5459 inst.error = _("dest and source1 must be the same register");
5460 return;
5461 }
5462
5463 /* Can't do this for SUB. */
5464 if (subtract)
5465 {
5466 inst.error = _("subtract valid only on lo regs");
5467 return;
5468 }
5469
5470 inst.instruction = (T_OPCODE_ADD_HI
5471 | (Rd > 7 ? THUMB_H1 : 0)
5472 | (Rn > 7 ? THUMB_H2 : 0));
5473 inst.instruction |= (Rd & 7) | ((Rn & 7) << 3);
5474 }
5475 else
5476 {
5477 inst.instruction = subtract ? T_OPCODE_SUB_R3 : T_OPCODE_ADD_R3;
5478 inst.instruction |= Rd | (Rs << 3) | (Rn << 6);
5479 }
5480 }
5481 else
5482 {
5483 /* Immediate expression, now things start to get nasty. */
5484
5485 /* First deal with HI regs, only very restricted cases allowed:
5486 Adjusting SP, and using PC or SP to get an address. */
5487 if ((Rd > 7 && (Rd != REG_SP || Rs != REG_SP))
5488 || (Rs > 7 && Rs != REG_SP && Rs != REG_PC))
5489 {
5490 inst.error = _("invalid Hi register with immediate");
5491 return;
5492 }
5493
5494 if (inst.reloc.exp.X_op != O_constant)
5495 {
5496 /* Value isn't known yet, all we can do is store all the fragments
5497 we know about in the instruction and let the reloc hacking
5498 work it all out. */
5499 inst.instruction = (subtract ? 0x8000 : 0) | (Rd << 4) | Rs;
5500 inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD;
5501 }
5502 else
5503 {
5504 int offset = inst.reloc.exp.X_add_number;
5505
5506 if (subtract)
5507 offset = -offset;
5508
5509 if (offset < 0)
5510 {
5511 offset = -offset;
5512 subtract = 1;
5513
5514 /* Quick check, in case offset is MIN_INT. */
5515 if (offset < 0)
5516 {
5517 inst.error = _("immediate value out of range");
5518 return;
5519 }
5520 }
5521 else
5522 subtract = 0;
5523
5524 if (Rd == REG_SP)
5525 {
5526 if (offset & ~0x1fc)
5527 {
5528 inst.error = _("invalid immediate value for stack adjust");
5529 return;
5530 }
5531 inst.instruction = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST;
5532 inst.instruction |= offset >> 2;
5533 }
5534 else if (Rs == REG_PC || Rs == REG_SP)
5535 {
5536 if (subtract
5537 || (offset & ~0x3fc))
5538 {
5539 inst.error = _("invalid immediate for address calculation");
5540 return;
5541 }
5542 inst.instruction = (Rs == REG_PC ? T_OPCODE_ADD_PC
5543 : T_OPCODE_ADD_SP);
5544 inst.instruction |= (Rd << 8) | (offset >> 2);
5545 }
5546 else if (Rs == Rd)
5547 {
5548 if (offset & ~0xff)
5549 {
5550 inst.error = _("immediate value out of range");
5551 return;
5552 }
5553 inst.instruction = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8;
5554 inst.instruction |= (Rd << 8) | offset;
5555 }
5556 else
5557 {
5558 if (offset & ~0x7)
5559 {
5560 inst.error = _("immediate value out of range");
5561 return;
5562 }
5563 inst.instruction = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3;
5564 inst.instruction |= Rd | (Rs << 3) | (offset << 6);
5565 }
5566 }
5567 }
5568
5569 end_of_line (str);
5570 }
5571
5572 static void
5573 thumb_shift (str, shift)
5574 char * str;
5575 int shift;
5576 {
5577 int Rd, Rs, Rn = FAIL;
5578
5579 skip_whitespace (str);
5580
5581 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
5582 || skip_past_comma (&str) == FAIL)
5583 {
5584 if (! inst.error)
5585 inst.error = BAD_ARGS;
5586 return;
5587 }
5588
5589 if (is_immediate_prefix (*str))
5590 {
5591 /* Two operand immediate format, set Rs to Rd. */
5592 Rs = Rd;
5593 str ++;
5594 if (my_get_expression (&inst.reloc.exp, &str))
5595 return;
5596 }
5597 else
5598 {
5599 if ((Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5600 return;
5601
5602 if (skip_past_comma (&str) == FAIL)
5603 {
5604 /* Two operand format, shuffle the registers
5605 and pretend there are 3. */
5606 Rn = Rs;
5607 Rs = Rd;
5608 }
5609 else if (is_immediate_prefix (*str))
5610 {
5611 str++;
5612 if (my_get_expression (&inst.reloc.exp, &str))
5613 return;
5614 }
5615 else if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5616 return;
5617 }
5618
5619 /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL;
5620 for the latter case, EXPR contains the immediate that was found. */
5621
5622 if (Rn != FAIL)
5623 {
5624 if (Rs != Rd)
5625 {
5626 inst.error = _("source1 and dest must be same register");
5627 return;
5628 }
5629
5630 switch (shift)
5631 {
5632 case THUMB_ASR: inst.instruction = T_OPCODE_ASR_R; break;
5633 case THUMB_LSL: inst.instruction = T_OPCODE_LSL_R; break;
5634 case THUMB_LSR: inst.instruction = T_OPCODE_LSR_R; break;
5635 }
5636
5637 inst.instruction |= Rd | (Rn << 3);
5638 }
5639 else
5640 {
5641 switch (shift)
5642 {
5643 case THUMB_ASR: inst.instruction = T_OPCODE_ASR_I; break;
5644 case THUMB_LSL: inst.instruction = T_OPCODE_LSL_I; break;
5645 case THUMB_LSR: inst.instruction = T_OPCODE_LSR_I; break;
5646 }
5647
5648 if (inst.reloc.exp.X_op != O_constant)
5649 {
5650 /* Value isn't known yet, create a dummy reloc and let reloc
5651 hacking fix it up. */
5652 inst.reloc.type = BFD_RELOC_ARM_THUMB_SHIFT;
5653 }
5654 else
5655 {
5656 unsigned shift_value = inst.reloc.exp.X_add_number;
5657
5658 if (shift_value > 32 || (shift_value == 32 && shift == THUMB_LSL))
5659 {
5660 inst.error = _("Invalid immediate for shift");
5661 return;
5662 }
5663
5664 /* Shifts of zero are handled by converting to LSL. */
5665 if (shift_value == 0)
5666 inst.instruction = T_OPCODE_LSL_I;
5667
5668 /* Shifts of 32 are encoded as a shift of zero. */
5669 if (shift_value == 32)
5670 shift_value = 0;
5671
5672 inst.instruction |= shift_value << 6;
5673 }
5674
5675 inst.instruction |= Rd | (Rs << 3);
5676 }
5677
5678 end_of_line (str);
5679 }
5680
5681 static void
5682 thumb_mov_compare (str, move)
5683 char * str;
5684 int move;
5685 {
5686 int Rd, Rs = FAIL;
5687
5688 skip_whitespace (str);
5689
5690 if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL
5691 || skip_past_comma (&str) == FAIL)
5692 {
5693 if (! inst.error)
5694 inst.error = BAD_ARGS;
5695 return;
5696 }
5697
5698 if (is_immediate_prefix (*str))
5699 {
5700 str++;
5701 if (my_get_expression (&inst.reloc.exp, &str))
5702 return;
5703 }
5704 else if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5705 return;
5706
5707 if (Rs != FAIL)
5708 {
5709 if (Rs < 8 && Rd < 8)
5710 {
5711 if (move == THUMB_MOVE)
5712 /* A move of two lowregs is encoded as ADD Rd, Rs, #0
5713 since a MOV instruction produces unpredictable results. */
5714 inst.instruction = T_OPCODE_ADD_I3;
5715 else
5716 inst.instruction = T_OPCODE_CMP_LR;
5717 inst.instruction |= Rd | (Rs << 3);
5718 }
5719 else
5720 {
5721 if (move == THUMB_MOVE)
5722 inst.instruction = T_OPCODE_MOV_HR;
5723 else
5724 inst.instruction = T_OPCODE_CMP_HR;
5725
5726 if (Rd > 7)
5727 inst.instruction |= THUMB_H1;
5728
5729 if (Rs > 7)
5730 inst.instruction |= THUMB_H2;
5731
5732 inst.instruction |= (Rd & 7) | ((Rs & 7) << 3);
5733 }
5734 }
5735 else
5736 {
5737 if (Rd > 7)
5738 {
5739 inst.error = _("only lo regs allowed with immediate");
5740 return;
5741 }
5742
5743 if (move == THUMB_MOVE)
5744 inst.instruction = T_OPCODE_MOV_I8;
5745 else
5746 inst.instruction = T_OPCODE_CMP_I8;
5747
5748 inst.instruction |= Rd << 8;
5749
5750 if (inst.reloc.exp.X_op != O_constant)
5751 inst.reloc.type = BFD_RELOC_ARM_THUMB_IMM;
5752 else
5753 {
5754 unsigned value = inst.reloc.exp.X_add_number;
5755
5756 if (value > 255)
5757 {
5758 inst.error = _("invalid immediate");
5759 return;
5760 }
5761
5762 inst.instruction |= value;
5763 }
5764 }
5765
5766 end_of_line (str);
5767 }
5768
5769 static void
5770 thumb_load_store (str, load_store, size)
5771 char * str;
5772 int load_store;
5773 int size;
5774 {
5775 int Rd, Rb, Ro = FAIL;
5776
5777 skip_whitespace (str);
5778
5779 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
5780 || skip_past_comma (&str) == FAIL)
5781 {
5782 if (! inst.error)
5783 inst.error = BAD_ARGS;
5784 return;
5785 }
5786
5787 if (*str == '[')
5788 {
5789 str++;
5790 if ((Rb = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5791 return;
5792
5793 if (skip_past_comma (&str) != FAIL)
5794 {
5795 if (is_immediate_prefix (*str))
5796 {
5797 str++;
5798 if (my_get_expression (&inst.reloc.exp, &str))
5799 return;
5800 }
5801 else if ((Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5802 return;
5803 }
5804 else
5805 {
5806 inst.reloc.exp.X_op = O_constant;
5807 inst.reloc.exp.X_add_number = 0;
5808 }
5809
5810 if (*str != ']')
5811 {
5812 inst.error = _("expected ']'");
5813 return;
5814 }
5815 str++;
5816 }
5817 else if (*str == '=')
5818 {
5819 /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op. */
5820 str++;
5821
5822 skip_whitespace (str);
5823
5824 if (my_get_expression (& inst.reloc.exp, & str))
5825 return;
5826
5827 end_of_line (str);
5828
5829 if ( inst.reloc.exp.X_op != O_constant
5830 && inst.reloc.exp.X_op != O_symbol)
5831 {
5832 inst.error = "Constant expression expected";
5833 return;
5834 }
5835
5836 if (inst.reloc.exp.X_op == O_constant
5837 && ((inst.reloc.exp.X_add_number & ~0xFF) == 0))
5838 {
5839 /* This can be done with a mov instruction. */
5840
5841 inst.instruction = T_OPCODE_MOV_I8 | (Rd << 8);
5842 inst.instruction |= inst.reloc.exp.X_add_number;
5843 return;
5844 }
5845
5846 /* Insert into literal pool. */
5847 if (add_to_lit_pool () == FAIL)
5848 {
5849 if (!inst.error)
5850 inst.error = "literal pool insertion failed";
5851 return;
5852 }
5853
5854 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5855 inst.reloc.pc_rel = 1;
5856 inst.instruction = T_OPCODE_LDR_PC | (Rd << 8);
5857 /* Adjust ARM pipeline offset to Thumb. */
5858 inst.reloc.exp.X_add_number += 4;
5859
5860 return;
5861 }
5862 else
5863 {
5864 if (my_get_expression (&inst.reloc.exp, &str))
5865 return;
5866
5867 inst.instruction = T_OPCODE_LDR_PC | (Rd << 8);
5868 inst.reloc.pc_rel = 1;
5869 inst.reloc.exp.X_add_number -= 4; /* Pipeline offset. */
5870 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5871 end_of_line (str);
5872 return;
5873 }
5874
5875 if (Rb == REG_PC || Rb == REG_SP)
5876 {
5877 if (size != THUMB_WORD)
5878 {
5879 inst.error = _("byte or halfword not valid for base register");
5880 return;
5881 }
5882 else if (Rb == REG_PC && load_store != THUMB_LOAD)
5883 {
5884 inst.error = _("R15 based store not allowed");
5885 return;
5886 }
5887 else if (Ro != FAIL)
5888 {
5889 inst.error = _("Invalid base register for register offset");
5890 return;
5891 }
5892
5893 if (Rb == REG_PC)
5894 inst.instruction = T_OPCODE_LDR_PC;
5895 else if (load_store == THUMB_LOAD)
5896 inst.instruction = T_OPCODE_LDR_SP;
5897 else
5898 inst.instruction = T_OPCODE_STR_SP;
5899
5900 inst.instruction |= Rd << 8;
5901 if (inst.reloc.exp.X_op == O_constant)
5902 {
5903 unsigned offset = inst.reloc.exp.X_add_number;
5904
5905 if (offset & ~0x3fc)
5906 {
5907 inst.error = _("invalid offset");
5908 return;
5909 }
5910
5911 inst.instruction |= offset >> 2;
5912 }
5913 else
5914 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5915 }
5916 else if (Rb > 7)
5917 {
5918 inst.error = _("invalid base register in load/store");
5919 return;
5920 }
5921 else if (Ro == FAIL)
5922 {
5923 /* Immediate offset. */
5924 if (size == THUMB_WORD)
5925 inst.instruction = (load_store == THUMB_LOAD
5926 ? T_OPCODE_LDR_IW : T_OPCODE_STR_IW);
5927 else if (size == THUMB_HALFWORD)
5928 inst.instruction = (load_store == THUMB_LOAD
5929 ? T_OPCODE_LDR_IH : T_OPCODE_STR_IH);
5930 else
5931 inst.instruction = (load_store == THUMB_LOAD
5932 ? T_OPCODE_LDR_IB : T_OPCODE_STR_IB);
5933
5934 inst.instruction |= Rd | (Rb << 3);
5935
5936 if (inst.reloc.exp.X_op == O_constant)
5937 {
5938 unsigned offset = inst.reloc.exp.X_add_number;
5939
5940 if (offset & ~(0x1f << size))
5941 {
5942 inst.error = _("Invalid offset");
5943 return;
5944 }
5945 inst.instruction |= (offset >> size) << 6;
5946 }
5947 else
5948 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5949 }
5950 else
5951 {
5952 /* Register offset. */
5953 if (size == THUMB_WORD)
5954 inst.instruction = (load_store == THUMB_LOAD
5955 ? T_OPCODE_LDR_RW : T_OPCODE_STR_RW);
5956 else if (size == THUMB_HALFWORD)
5957 inst.instruction = (load_store == THUMB_LOAD
5958 ? T_OPCODE_LDR_RH : T_OPCODE_STR_RH);
5959 else
5960 inst.instruction = (load_store == THUMB_LOAD
5961 ? T_OPCODE_LDR_RB : T_OPCODE_STR_RB);
5962
5963 inst.instruction |= Rd | (Rb << 3) | (Ro << 6);
5964 }
5965
5966 end_of_line (str);
5967 }
5968
5969 static void
5970 do_t_nop (str)
5971 char * str;
5972 {
5973 /* Do nothing. */
5974 end_of_line (str);
5975 return;
5976 }
5977
5978 /* Handle the Format 4 instructions that do not have equivalents in other
5979 formats. That is, ADC, AND, EOR, SBC, ROR, TST, NEG, CMN, ORR, MUL,
5980 BIC and MVN. */
5981
5982 static void
5983 do_t_arit (str)
5984 char * str;
5985 {
5986 int Rd, Rs, Rn;
5987
5988 skip_whitespace (str);
5989
5990 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
5991 || skip_past_comma (&str) == FAIL
5992 || (Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5993 {
5994 inst.error = BAD_ARGS;
5995 return;
5996 }
5997
5998 if (skip_past_comma (&str) != FAIL)
5999 {
6000 /* Three operand format not allowed for TST, CMN, NEG and MVN.
6001 (It isn't allowed for CMP either, but that isn't handled by this
6002 function.) */
6003 if (inst.instruction == T_OPCODE_TST
6004 || inst.instruction == T_OPCODE_CMN
6005 || inst.instruction == T_OPCODE_NEG
6006 || inst.instruction == T_OPCODE_MVN)
6007 {
6008 inst.error = BAD_ARGS;
6009 return;
6010 }
6011
6012 if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
6013 return;
6014
6015 if (Rs != Rd)
6016 {
6017 inst.error = _("dest and source1 one must be the same register");
6018 return;
6019 }
6020 Rs = Rn;
6021 }
6022
6023 if (inst.instruction == T_OPCODE_MUL
6024 && Rs == Rd)
6025 as_tsktsk (_("Rs and Rd must be different in MUL"));
6026
6027 inst.instruction |= Rd | (Rs << 3);
6028 end_of_line (str);
6029 }
6030
6031 static void
6032 do_t_add (str)
6033 char * str;
6034 {
6035 thumb_add_sub (str, 0);
6036 }
6037
6038 static void
6039 do_t_asr (str)
6040 char * str;
6041 {
6042 thumb_shift (str, THUMB_ASR);
6043 }
6044
6045 static void
6046 do_t_branch9 (str)
6047 char * str;
6048 {
6049 if (my_get_expression (&inst.reloc.exp, &str))
6050 return;
6051 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH9;
6052 inst.reloc.pc_rel = 1;
6053 end_of_line (str);
6054 }
6055
6056 static void
6057 do_t_branch12 (str)
6058 char * str;
6059 {
6060 if (my_get_expression (&inst.reloc.exp, &str))
6061 return;
6062 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH12;
6063 inst.reloc.pc_rel = 1;
6064 end_of_line (str);
6065 }
6066
6067 /* Find the real, Thumb encoded start of a Thumb function. */
6068
6069 static symbolS *
6070 find_real_start (symbolP)
6071 symbolS * symbolP;
6072 {
6073 char * real_start;
6074 const char * name = S_GET_NAME (symbolP);
6075 symbolS * new_target;
6076
6077 /* This definiton must agree with the one in gcc/config/arm/thumb.c. */
6078 #define STUB_NAME ".real_start_of"
6079
6080 if (name == NULL)
6081 abort ();
6082
6083 /* Names that start with '.' are local labels, not function entry points.
6084 The compiler may generate BL instructions to these labels because it
6085 needs to perform a branch to a far away location. */
6086 if (name[0] == '.')
6087 return symbolP;
6088
6089 real_start = malloc (strlen (name) + strlen (STUB_NAME) + 1);
6090 sprintf (real_start, "%s%s", STUB_NAME, name);
6091
6092 new_target = symbol_find (real_start);
6093
6094 if (new_target == NULL)
6095 {
6096 as_warn ("Failed to find real start of function: %s\n", name);
6097 new_target = symbolP;
6098 }
6099
6100 free (real_start);
6101
6102 return new_target;
6103 }
6104
6105 static void
6106 do_t_branch23 (str)
6107 char * str;
6108 {
6109 if (my_get_expression (& inst.reloc.exp, & str))
6110 return;
6111
6112 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH23;
6113 inst.reloc.pc_rel = 1;
6114 end_of_line (str);
6115
6116 /* If the destination of the branch is a defined symbol which does not have
6117 the THUMB_FUNC attribute, then we must be calling a function which has
6118 the (interfacearm) attribute. We look for the Thumb entry point to that
6119 function and change the branch to refer to that function instead. */
6120 if ( inst.reloc.exp.X_op == O_symbol
6121 && inst.reloc.exp.X_add_symbol != NULL
6122 && S_IS_DEFINED (inst.reloc.exp.X_add_symbol)
6123 && ! THUMB_IS_FUNC (inst.reloc.exp.X_add_symbol))
6124 inst.reloc.exp.X_add_symbol =
6125 find_real_start (inst.reloc.exp.X_add_symbol);
6126 }
6127
6128 static void
6129 do_t_bx (str)
6130 char * str;
6131 {
6132 int reg;
6133
6134 skip_whitespace (str);
6135
6136 if ((reg = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
6137 return;
6138
6139 /* This sets THUMB_H2 from the top bit of reg. */
6140 inst.instruction |= reg << 3;
6141
6142 /* ??? FIXME: Should add a hacky reloc here if reg is REG_PC. The reloc
6143 should cause the alignment to be checked once it is known. This is
6144 because BX PC only works if the instruction is word aligned. */
6145
6146 end_of_line (str);
6147 }
6148
6149 static void
6150 do_t_compare (str)
6151 char * str;
6152 {
6153 thumb_mov_compare (str, THUMB_COMPARE);
6154 }
6155
6156 static void
6157 do_t_ldmstm (str)
6158 char * str;
6159 {
6160 int Rb;
6161 long range;
6162
6163 skip_whitespace (str);
6164
6165 if ((Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
6166 return;
6167
6168 if (*str != '!')
6169 as_warn (_("Inserted missing '!': load/store multiple always writes back base register"));
6170 else
6171 str++;
6172
6173 if (skip_past_comma (&str) == FAIL
6174 || (range = reg_list (&str)) == FAIL)
6175 {
6176 if (! inst.error)
6177 inst.error = BAD_ARGS;
6178 return;
6179 }
6180
6181 if (inst.reloc.type != BFD_RELOC_NONE)
6182 {
6183 /* This really doesn't seem worth it. */
6184 inst.reloc.type = BFD_RELOC_NONE;
6185 inst.error = _("Expression too complex");
6186 return;
6187 }
6188
6189 if (range & ~0xff)
6190 {
6191 inst.error = _("only lo-regs valid in load/store multiple");
6192 return;
6193 }
6194
6195 inst.instruction |= (Rb << 8) | range;
6196 end_of_line (str);
6197 }
6198
6199 static void
6200 do_t_ldr (str)
6201 char * str;
6202 {
6203 thumb_load_store (str, THUMB_LOAD, THUMB_WORD);
6204 }
6205
6206 static void
6207 do_t_ldrb (str)
6208 char * str;
6209 {
6210 thumb_load_store (str, THUMB_LOAD, THUMB_BYTE);
6211 }
6212
6213 static void
6214 do_t_ldrh (str)
6215 char * str;
6216 {
6217 thumb_load_store (str, THUMB_LOAD, THUMB_HALFWORD);
6218 }
6219
6220 static void
6221 do_t_lds (str)
6222 char * str;
6223 {
6224 int Rd, Rb, Ro;
6225
6226 skip_whitespace (str);
6227
6228 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6229 || skip_past_comma (&str) == FAIL
6230 || *str++ != '['
6231 || (Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6232 || skip_past_comma (&str) == FAIL
6233 || (Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6234 || *str++ != ']')
6235 {
6236 if (! inst.error)
6237 inst.error = _("Syntax: ldrs[b] Rd, [Rb, Ro]");
6238 return;
6239 }
6240
6241 inst.instruction |= Rd | (Rb << 3) | (Ro << 6);
6242 end_of_line (str);
6243 }
6244
6245 static void
6246 do_t_lsl (str)
6247 char * str;
6248 {
6249 thumb_shift (str, THUMB_LSL);
6250 }
6251
6252 static void
6253 do_t_lsr (str)
6254 char * str;
6255 {
6256 thumb_shift (str, THUMB_LSR);
6257 }
6258
6259 static void
6260 do_t_mov (str)
6261 char * str;
6262 {
6263 thumb_mov_compare (str, THUMB_MOVE);
6264 }
6265
6266 static void
6267 do_t_push_pop (str)
6268 char * str;
6269 {
6270 long range;
6271
6272 skip_whitespace (str);
6273
6274 if ((range = reg_list (&str)) == FAIL)
6275 {
6276 if (! inst.error)
6277 inst.error = BAD_ARGS;
6278 return;
6279 }
6280
6281 if (inst.reloc.type != BFD_RELOC_NONE)
6282 {
6283 /* This really doesn't seem worth it. */
6284 inst.reloc.type = BFD_RELOC_NONE;
6285 inst.error = _("Expression too complex");
6286 return;
6287 }
6288
6289 if (range & ~0xff)
6290 {
6291 if ((inst.instruction == T_OPCODE_PUSH
6292 && (range & ~0xff) == 1 << REG_LR)
6293 || (inst.instruction == T_OPCODE_POP
6294 && (range & ~0xff) == 1 << REG_PC))
6295 {
6296 inst.instruction |= THUMB_PP_PC_LR;
6297 range &= 0xff;
6298 }
6299 else
6300 {
6301 inst.error = _("invalid register list to push/pop instruction");
6302 return;
6303 }
6304 }
6305
6306 inst.instruction |= range;
6307 end_of_line (str);
6308 }
6309
6310 static void
6311 do_t_str (str)
6312 char * str;
6313 {
6314 thumb_load_store (str, THUMB_STORE, THUMB_WORD);
6315 }
6316
6317 static void
6318 do_t_strb (str)
6319 char * str;
6320 {
6321 thumb_load_store (str, THUMB_STORE, THUMB_BYTE);
6322 }
6323
6324 static void
6325 do_t_strh (str)
6326 char * str;
6327 {
6328 thumb_load_store (str, THUMB_STORE, THUMB_HALFWORD);
6329 }
6330
6331 static void
6332 do_t_sub (str)
6333 char * str;
6334 {
6335 thumb_add_sub (str, 1);
6336 }
6337
6338 static void
6339 do_t_swi (str)
6340 char * str;
6341 {
6342 skip_whitespace (str);
6343
6344 if (my_get_expression (&inst.reloc.exp, &str))
6345 return;
6346
6347 inst.reloc.type = BFD_RELOC_ARM_SWI;
6348 end_of_line (str);
6349 return;
6350 }
6351
6352 static void
6353 do_t_adr (str)
6354 char * str;
6355 {
6356 int reg;
6357
6358 /* This is a pseudo-op of the form "adr rd, label" to be converted
6359 into a relative address of the form "add rd, pc, #label-.-4". */
6360 skip_whitespace (str);
6361
6362 /* Store Rd in temporary location inside instruction. */
6363 if ((reg = reg_required_here (&str, 4)) == FAIL
6364 || (reg > 7) /* For Thumb reg must be r0..r7. */
6365 || skip_past_comma (&str) == FAIL
6366 || my_get_expression (&inst.reloc.exp, &str))
6367 {
6368 if (!inst.error)
6369 inst.error = BAD_ARGS;
6370 return;
6371 }
6372
6373 inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD;
6374 inst.reloc.exp.X_add_number -= 4; /* PC relative adjust. */
6375 inst.reloc.pc_rel = 1;
6376 inst.instruction |= REG_PC; /* Rd is already placed into the instruction. */
6377
6378 end_of_line (str);
6379 }
6380
6381 static void
6382 insert_reg (entry)
6383 int entry;
6384 {
6385 int len = strlen (reg_table[entry].name) + 2;
6386 char * buf = (char *) xmalloc (len);
6387 char * buf2 = (char *) xmalloc (len);
6388 int i = 0;
6389
6390 #ifdef REGISTER_PREFIX
6391 buf[i++] = REGISTER_PREFIX;
6392 #endif
6393
6394 strcpy (buf + i, reg_table[entry].name);
6395
6396 for (i = 0; buf[i]; i++)
6397 buf2[i] = islower (buf[i]) ? toupper (buf[i]) : buf[i];
6398
6399 buf2[i] = '\0';
6400
6401 hash_insert (arm_reg_hsh, buf, (PTR) & reg_table[entry]);
6402 hash_insert (arm_reg_hsh, buf2, (PTR) & reg_table[entry]);
6403 }
6404
6405 static void
6406 insert_reg_alias (str, regnum)
6407 char *str;
6408 int regnum;
6409 {
6410 struct reg_entry *new =
6411 (struct reg_entry *) xmalloc (sizeof (struct reg_entry));
6412 char *name = xmalloc (strlen (str) + 1);
6413 strcpy (name, str);
6414
6415 new->name = name;
6416 new->number = regnum;
6417
6418 hash_insert (arm_reg_hsh, name, (PTR) new);
6419 }
6420
6421 static void
6422 set_constant_flonums ()
6423 {
6424 int i;
6425
6426 for (i = 0; i < NUM_FLOAT_VALS; i++)
6427 if (atof_ieee ((char *) fp_const[i], 'x', fp_values[i]) == NULL)
6428 abort ();
6429 }
6430
6431 void
6432 md_begin ()
6433 {
6434 unsigned mach;
6435 unsigned int i;
6436
6437 if ( (arm_ops_hsh = hash_new ()) == NULL
6438 || (arm_tops_hsh = hash_new ()) == NULL
6439 || (arm_cond_hsh = hash_new ()) == NULL
6440 || (arm_shift_hsh = hash_new ()) == NULL
6441 || (arm_reg_hsh = hash_new ()) == NULL
6442 || (arm_psr_hsh = hash_new ()) == NULL)
6443 as_fatal (_("Virtual memory exhausted"));
6444
6445 for (i = 0; i < sizeof (insns) / sizeof (struct asm_opcode); i++)
6446 hash_insert (arm_ops_hsh, insns[i].template, (PTR) (insns + i));
6447 for (i = 0; i < sizeof (tinsns) / sizeof (struct thumb_opcode); i++)
6448 hash_insert (arm_tops_hsh, tinsns[i].template, (PTR) (tinsns + i));
6449 for (i = 0; i < sizeof (conds) / sizeof (struct asm_cond); i++)
6450 hash_insert (arm_cond_hsh, conds[i].template, (PTR) (conds + i));
6451 for (i = 0; i < sizeof (shift_names) / sizeof (struct asm_shift_name); i++)
6452 hash_insert (arm_shift_hsh, shift_names[i].name, (PTR) (shift_names + i));
6453 for (i = 0; i < sizeof (psrs) / sizeof (struct asm_psr); i++)
6454 hash_insert (arm_psr_hsh, psrs[i].template, (PTR) (psrs + i));
6455
6456 for (i = 0; reg_table[i].name; i++)
6457 insert_reg (i);
6458
6459 set_constant_flonums ();
6460
6461 #if defined OBJ_COFF || defined OBJ_ELF
6462 {
6463 unsigned int flags = 0;
6464
6465 /* Set the flags in the private structure. */
6466 if (uses_apcs_26) flags |= F_APCS26;
6467 if (support_interwork) flags |= F_INTERWORK;
6468 if (uses_apcs_float) flags |= F_APCS_FLOAT;
6469 if (pic_code) flags |= F_PIC;
6470 if ((cpu_variant & FPU_ALL) == FPU_NONE) flags |= F_SOFT_FLOAT;
6471
6472 bfd_set_private_flags (stdoutput, flags);
6473
6474 /* We have run out flags in the COFF header to encode the
6475 status of ATPCS support, so instead we create a dummy,
6476 empty, debug section called .arm.atpcs. */
6477 if (atpcs)
6478 {
6479 asection * sec;
6480
6481 sec = bfd_make_section (stdoutput, ".arm.atpcs");
6482
6483 if (sec != NULL)
6484 {
6485 bfd_set_section_flags
6486 (stdoutput, sec, SEC_READONLY | SEC_DEBUGGING /* | SEC_HAS_CONTENTS */);
6487 bfd_set_section_size (stdoutput, sec, 0);
6488 bfd_set_section_contents (stdoutput, sec, NULL, 0, 0);
6489 }
6490 }
6491 }
6492 #endif
6493
6494 /* Record the CPU type as well. */
6495 switch (cpu_variant & ARM_CPU_MASK)
6496 {
6497 case ARM_2:
6498 mach = bfd_mach_arm_2;
6499 break;
6500
6501 case ARM_3: /* Also ARM_250. */
6502 mach = bfd_mach_arm_2a;
6503 break;
6504
6505 default:
6506 case ARM_6 | ARM_3 | ARM_2: /* Actually no CPU type defined. */
6507 mach = bfd_mach_arm_4;
6508 break;
6509
6510 case ARM_7: /* Also ARM_6. */
6511 mach = bfd_mach_arm_3;
6512 break;
6513 }
6514
6515 /* Catch special cases. */
6516 if (cpu_variant != (FPU_DEFAULT | CPU_DEFAULT))
6517 {
6518 if (cpu_variant & ARM_EXT_XSCALE)
6519 mach = bfd_mach_arm_XScale;
6520 else if (cpu_variant & ARM_EXT_V5E)
6521 mach = bfd_mach_arm_5TE;
6522 else if (cpu_variant & ARM_EXT_V5)
6523 {
6524 if (cpu_variant & ARM_EXT_THUMB)
6525 mach = bfd_mach_arm_5T;
6526 else
6527 mach = bfd_mach_arm_5;
6528 }
6529 else if (cpu_variant & ARM_EXT_HALFWORD)
6530 {
6531 if (cpu_variant & ARM_EXT_THUMB)
6532 mach = bfd_mach_arm_4T;
6533 else
6534 mach = bfd_mach_arm_4;
6535 }
6536 else if (cpu_variant & ARM_EXT_LONGMUL)
6537 mach = bfd_mach_arm_3M;
6538 }
6539
6540 bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach);
6541 }
6542
6543 /* Turn an integer of n bytes (in val) into a stream of bytes appropriate
6544 for use in the a.out file, and stores them in the array pointed to by buf.
6545 This knows about the endian-ness of the target machine and does
6546 THE RIGHT THING, whatever it is. Possible values for n are 1 (byte)
6547 2 (short) and 4 (long) Floating numbers are put out as a series of
6548 LITTLENUMS (shorts, here at least). */
6549
6550 void
6551 md_number_to_chars (buf, val, n)
6552 char * buf;
6553 valueT val;
6554 int n;
6555 {
6556 if (target_big_endian)
6557 number_to_chars_bigendian (buf, val, n);
6558 else
6559 number_to_chars_littleendian (buf, val, n);
6560 }
6561
6562 static valueT
6563 md_chars_to_number (buf, n)
6564 char * buf;
6565 int n;
6566 {
6567 valueT result = 0;
6568 unsigned char * where = (unsigned char *) buf;
6569
6570 if (target_big_endian)
6571 {
6572 while (n--)
6573 {
6574 result <<= 8;
6575 result |= (*where++ & 255);
6576 }
6577 }
6578 else
6579 {
6580 while (n--)
6581 {
6582 result <<= 8;
6583 result |= (where[n] & 255);
6584 }
6585 }
6586
6587 return result;
6588 }
6589
6590 /* Turn a string in input_line_pointer into a floating point constant
6591 of type TYPE, and store the appropriate bytes in *LITP. The number
6592 of LITTLENUMS emitted is stored in *SIZEP. An error message is
6593 returned, or NULL on OK.
6594
6595 Note that fp constants aren't represent in the normal way on the ARM.
6596 In big endian mode, things are as expected. However, in little endian
6597 mode fp constants are big-endian word-wise, and little-endian byte-wise
6598 within the words. For example, (double) 1.1 in big endian mode is
6599 the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is
6600 the byte sequence 99 99 f1 3f 9a 99 99 99.
6601
6602 ??? The format of 12 byte floats is uncertain according to gcc's arm.h. */
6603
6604 char *
6605 md_atof (type, litP, sizeP)
6606 char type;
6607 char * litP;
6608 int * sizeP;
6609 {
6610 int prec;
6611 LITTLENUM_TYPE words[MAX_LITTLENUMS];
6612 char *t;
6613 int i;
6614
6615 switch (type)
6616 {
6617 case 'f':
6618 case 'F':
6619 case 's':
6620 case 'S':
6621 prec = 2;
6622 break;
6623
6624 case 'd':
6625 case 'D':
6626 case 'r':
6627 case 'R':
6628 prec = 4;
6629 break;
6630
6631 case 'x':
6632 case 'X':
6633 prec = 6;
6634 break;
6635
6636 case 'p':
6637 case 'P':
6638 prec = 6;
6639 break;
6640
6641 default:
6642 *sizeP = 0;
6643 return _("Bad call to MD_ATOF()");
6644 }
6645
6646 t = atof_ieee (input_line_pointer, type, words);
6647 if (t)
6648 input_line_pointer = t;
6649 *sizeP = prec * 2;
6650
6651 if (target_big_endian)
6652 {
6653 for (i = 0; i < prec; i++)
6654 {
6655 md_number_to_chars (litP, (valueT) words[i], 2);
6656 litP += 2;
6657 }
6658 }
6659 else
6660 {
6661 /* For a 4 byte float the order of elements in `words' is 1 0. For an
6662 8 byte float the order is 1 0 3 2. */
6663 for (i = 0; i < prec; i += 2)
6664 {
6665 md_number_to_chars (litP, (valueT) words[i + 1], 2);
6666 md_number_to_chars (litP + 2, (valueT) words[i], 2);
6667 litP += 4;
6668 }
6669 }
6670
6671 return 0;
6672 }
6673
6674 /* The knowledge of the PC's pipeline offset is built into the insns
6675 themselves. */
6676
6677 long
6678 md_pcrel_from (fixP)
6679 fixS * fixP;
6680 {
6681 if (fixP->fx_addsy
6682 && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section
6683 && fixP->fx_subsy == NULL)
6684 return 0;
6685
6686 if (fixP->fx_pcrel && (fixP->fx_r_type == BFD_RELOC_ARM_THUMB_ADD))
6687 {
6688 /* PC relative addressing on the Thumb is slightly odd
6689 as the bottom two bits of the PC are forced to zero
6690 for the calculation. */
6691 return (fixP->fx_where + fixP->fx_frag->fr_address) & ~3;
6692 }
6693
6694 #ifdef TE_WINCE
6695 /* The pattern was adjusted to accomodate CE's off-by-one fixups,
6696 so we un-adjust here to compensate for the accomodation. */
6697 return fixP->fx_where + fixP->fx_frag->fr_address + 8;
6698 #else
6699 return fixP->fx_where + fixP->fx_frag->fr_address;
6700 #endif
6701 }
6702
6703 /* Round up a section size to the appropriate boundary. */
6704
6705 valueT
6706 md_section_align (segment, size)
6707 segT segment ATTRIBUTE_UNUSED;
6708 valueT size;
6709 {
6710 #ifdef OBJ_ELF
6711 return size;
6712 #else
6713 /* Round all sects to multiple of 4. */
6714 return (size + 3) & ~3;
6715 #endif
6716 }
6717
6718 /* Under ELF we need to default _GLOBAL_OFFSET_TABLE.
6719 Otherwise we have no need to default values of symbols. */
6720
6721 symbolS *
6722 md_undefined_symbol (name)
6723 char * name ATTRIBUTE_UNUSED;
6724 {
6725 #ifdef OBJ_ELF
6726 if (name[0] == '_' && name[1] == 'G'
6727 && streq (name, GLOBAL_OFFSET_TABLE_NAME))
6728 {
6729 if (!GOT_symbol)
6730 {
6731 if (symbol_find (name))
6732 as_bad ("GOT already in the symbol table");
6733
6734 GOT_symbol = symbol_new (name, undefined_section,
6735 (valueT) 0, & zero_address_frag);
6736 }
6737
6738 return GOT_symbol;
6739 }
6740 #endif
6741
6742 return 0;
6743 }
6744
6745 /* arm_reg_parse () := if it looks like a register, return its token and
6746 advance the pointer. */
6747
6748 static int
6749 arm_reg_parse (ccp)
6750 register char ** ccp;
6751 {
6752 char * start = * ccp;
6753 char c;
6754 char * p;
6755 struct reg_entry * reg;
6756
6757 #ifdef REGISTER_PREFIX
6758 if (*start != REGISTER_PREFIX)
6759 return FAIL;
6760 p = start + 1;
6761 #else
6762 p = start;
6763 #ifdef OPTIONAL_REGISTER_PREFIX
6764 if (*p == OPTIONAL_REGISTER_PREFIX)
6765 p++, start++;
6766 #endif
6767 #endif
6768 if (!isalpha (*p) || !is_name_beginner (*p))
6769 return FAIL;
6770
6771 c = *p++;
6772 while (isalpha (c) || isdigit (c) || c == '_')
6773 c = *p++;
6774
6775 *--p = 0;
6776 reg = (struct reg_entry *) hash_find (arm_reg_hsh, start);
6777 *p = c;
6778
6779 if (reg)
6780 {
6781 *ccp = p;
6782 return reg->number;
6783 }
6784
6785 return FAIL;
6786 }
6787
6788 int
6789 md_apply_fix3 (fixP, val, seg)
6790 fixS * fixP;
6791 valueT * val;
6792 segT seg;
6793 {
6794 offsetT value = * val;
6795 offsetT newval;
6796 unsigned int newimm;
6797 unsigned long temp;
6798 int sign;
6799 char * buf = fixP->fx_where + fixP->fx_frag->fr_literal;
6800 arm_fix_data * arm_data = (arm_fix_data *) fixP->tc_fix_data;
6801
6802 assert (fixP->fx_r_type < BFD_RELOC_UNUSED);
6803
6804 /* Note whether this will delete the relocation. */
6805 #if 0
6806 /* Patch from REarnshaw to JDavis (disabled for the moment, since it
6807 doesn't work fully.) */
6808 if ((fixP->fx_addsy == 0 || symbol_constant_p (fixP->fx_addsy))
6809 && !fixP->fx_pcrel)
6810 #else
6811 if (fixP->fx_addsy == 0 && !fixP->fx_pcrel)
6812 #endif
6813 fixP->fx_done = 1;
6814
6815 /* If this symbol is in a different section then we need to leave it for
6816 the linker to deal with. Unfortunately, md_pcrel_from can't tell,
6817 so we have to undo it's effects here. */
6818 if (fixP->fx_pcrel)
6819 {
6820 if (fixP->fx_addsy != NULL
6821 && S_IS_DEFINED (fixP->fx_addsy)
6822 && S_GET_SEGMENT (fixP->fx_addsy) != seg)
6823 {
6824 if (target_oabi
6825 && (fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH
6826 || fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BLX
6827 ))
6828 value = 0;
6829 else
6830 value += md_pcrel_from (fixP);
6831 }
6832 }
6833
6834 /* Remember value for emit_reloc. */
6835 fixP->fx_addnumber = value;
6836
6837 switch (fixP->fx_r_type)
6838 {
6839 case BFD_RELOC_ARM_IMMEDIATE:
6840 newimm = validate_immediate (value);
6841 temp = md_chars_to_number (buf, INSN_SIZE);
6842
6843 /* If the instruction will fail, see if we can fix things up by
6844 changing the opcode. */
6845 if (newimm == (unsigned int) FAIL
6846 && (newimm = negate_data_op (&temp, value)) == (unsigned int) FAIL)
6847 {
6848 as_bad_where (fixP->fx_file, fixP->fx_line,
6849 _("invalid constant (%lx) after fixup"),
6850 (unsigned long) value);
6851 break;
6852 }
6853
6854 newimm |= (temp & 0xfffff000);
6855 md_number_to_chars (buf, (valueT) newimm, INSN_SIZE);
6856 break;
6857
6858 case BFD_RELOC_ARM_ADRL_IMMEDIATE:
6859 {
6860 unsigned int highpart = 0;
6861 unsigned int newinsn = 0xe1a00000; /* nop. */
6862 newimm = validate_immediate (value);
6863 temp = md_chars_to_number (buf, INSN_SIZE);
6864
6865 /* If the instruction will fail, see if we can fix things up by
6866 changing the opcode. */
6867 if (newimm == (unsigned int) FAIL
6868 && (newimm = negate_data_op (& temp, value)) == (unsigned int) FAIL)
6869 {
6870 /* No ? OK - try using two ADD instructions to generate
6871 the value. */
6872 newimm = validate_immediate_twopart (value, & highpart);
6873
6874 /* Yes - then make sure that the second instruction is
6875 also an add. */
6876 if (newimm != (unsigned int) FAIL)
6877 newinsn = temp;
6878 /* Still No ? Try using a negated value. */
6879 else if ((newimm = validate_immediate_twopart (- value, & highpart)) != (unsigned int) FAIL)
6880 temp = newinsn = (temp & OPCODE_MASK) | OPCODE_SUB << DATA_OP_SHIFT;
6881 /* Otherwise - give up. */
6882 else
6883 {
6884 as_bad_where (fixP->fx_file, fixP->fx_line,
6885 _("Unable to compute ADRL instructions for PC offset of 0x%lx"),
6886 value);
6887 break;
6888 }
6889
6890 /* Replace the first operand in the 2nd instruction (which
6891 is the PC) with the destination register. We have
6892 already added in the PC in the first instruction and we
6893 do not want to do it again. */
6894 newinsn &= ~ 0xf0000;
6895 newinsn |= ((newinsn & 0x0f000) << 4);
6896 }
6897
6898 newimm |= (temp & 0xfffff000);
6899 md_number_to_chars (buf, (valueT) newimm, INSN_SIZE);
6900
6901 highpart |= (newinsn & 0xfffff000);
6902 md_number_to_chars (buf + INSN_SIZE, (valueT) highpart, INSN_SIZE);
6903 }
6904 break;
6905
6906 case BFD_RELOC_ARM_OFFSET_IMM:
6907 sign = value >= 0;
6908
6909 if (value < 0)
6910 value = - value;
6911
6912 if (validate_offset_imm (value, 0) == FAIL)
6913 {
6914 as_bad_where (fixP->fx_file, fixP->fx_line,
6915 _("bad immediate value for offset (%ld)"),
6916 (long) value);
6917 break;
6918 }
6919
6920 newval = md_chars_to_number (buf, INSN_SIZE);
6921 newval &= 0xff7ff000;
6922 newval |= value | (sign ? INDEX_UP : 0);
6923 md_number_to_chars (buf, newval, INSN_SIZE);
6924 break;
6925
6926 case BFD_RELOC_ARM_OFFSET_IMM8:
6927 case BFD_RELOC_ARM_HWLITERAL:
6928 sign = value >= 0;
6929
6930 if (value < 0)
6931 value = - value;
6932
6933 if (validate_offset_imm (value, 1) == FAIL)
6934 {
6935 if (fixP->fx_r_type == BFD_RELOC_ARM_HWLITERAL)
6936 as_bad_where (fixP->fx_file, fixP->fx_line,
6937 _("invalid literal constant: pool needs to be closer"));
6938 else
6939 as_bad (_("bad immediate value for half-word offset (%ld)"),
6940 (long) value);
6941 break;
6942 }
6943
6944 newval = md_chars_to_number (buf, INSN_SIZE);
6945 newval &= 0xff7ff0f0;
6946 newval |= ((value >> 4) << 8) | (value & 0xf) | (sign ? INDEX_UP : 0);
6947 md_number_to_chars (buf, newval, INSN_SIZE);
6948 break;
6949
6950 case BFD_RELOC_ARM_LITERAL:
6951 sign = value >= 0;
6952
6953 if (value < 0)
6954 value = - value;
6955
6956 if (validate_offset_imm (value, 0) == FAIL)
6957 {
6958 as_bad_where (fixP->fx_file, fixP->fx_line,
6959 _("invalid literal constant: pool needs to be closer"));
6960 break;
6961 }
6962
6963 newval = md_chars_to_number (buf, INSN_SIZE);
6964 newval &= 0xff7ff000;
6965 newval |= value | (sign ? INDEX_UP : 0);
6966 md_number_to_chars (buf, newval, INSN_SIZE);
6967 break;
6968
6969 case BFD_RELOC_ARM_SHIFT_IMM:
6970 newval = md_chars_to_number (buf, INSN_SIZE);
6971 if (((unsigned long) value) > 32
6972 || (value == 32
6973 && (((newval & 0x60) == 0) || (newval & 0x60) == 0x60)))
6974 {
6975 as_bad_where (fixP->fx_file, fixP->fx_line,
6976 _("shift expression is too large"));
6977 break;
6978 }
6979
6980 if (value == 0)
6981 /* Shifts of zero must be done as lsl. */
6982 newval &= ~0x60;
6983 else if (value == 32)
6984 value = 0;
6985 newval &= 0xfffff07f;
6986 newval |= (value & 0x1f) << 7;
6987 md_number_to_chars (buf, newval, INSN_SIZE);
6988 break;
6989
6990 case BFD_RELOC_ARM_SWI:
6991 if (arm_data->thumb_mode)
6992 {
6993 if (((unsigned long) value) > 0xff)
6994 as_bad_where (fixP->fx_file, fixP->fx_line,
6995 _("Invalid swi expression"));
6996 newval = md_chars_to_number (buf, THUMB_SIZE) & 0xff00;
6997 newval |= value;
6998 md_number_to_chars (buf, newval, THUMB_SIZE);
6999 }
7000 else
7001 {
7002 if (((unsigned long) value) > 0x00ffffff)
7003 as_bad_where (fixP->fx_file, fixP->fx_line,
7004 _("Invalid swi expression"));
7005 newval = md_chars_to_number (buf, INSN_SIZE) & 0xff000000;
7006 newval |= value;
7007 md_number_to_chars (buf, newval, INSN_SIZE);
7008 }
7009 break;
7010
7011 case BFD_RELOC_ARM_MULTI:
7012 if (((unsigned long) value) > 0xffff)
7013 as_bad_where (fixP->fx_file, fixP->fx_line,
7014 _("Invalid expression in load/store multiple"));
7015 newval = value | md_chars_to_number (buf, INSN_SIZE);
7016 md_number_to_chars (buf, newval, INSN_SIZE);
7017 break;
7018
7019 case BFD_RELOC_ARM_PCREL_BRANCH:
7020 newval = md_chars_to_number (buf, INSN_SIZE);
7021
7022 /* Sign-extend a 24-bit number. */
7023 #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
7024
7025 #ifdef OBJ_ELF
7026 if (! target_oabi)
7027 value = fixP->fx_offset;
7028 #endif
7029
7030 /* We are going to store value (shifted right by two) in the
7031 instruction, in a 24 bit, signed field. Thus we need to check
7032 that none of the top 8 bits of the shifted value (top 7 bits of
7033 the unshifted, unsigned value) are set, or that they are all set. */
7034 if ((value & ~ ((offsetT) 0x1ffffff)) != 0
7035 && ((value & ~ ((offsetT) 0x1ffffff)) != ~ ((offsetT) 0x1ffffff)))
7036 {
7037 #ifdef OBJ_ELF
7038 /* Normally we would be stuck at this point, since we cannot store
7039 the absolute address that is the destination of the branch in the
7040 24 bits of the branch instruction. If however, we happen to know
7041 that the destination of the branch is in the same section as the
7042 branch instruciton itself, then we can compute the relocation for
7043 ourselves and not have to bother the linker with it.
7044
7045 FIXME: The tests for OBJ_ELF and ! target_oabi are only here
7046 because I have not worked out how to do this for OBJ_COFF or
7047 target_oabi. */
7048 if (! target_oabi
7049 && fixP->fx_addsy != NULL
7050 && S_IS_DEFINED (fixP->fx_addsy)
7051 && S_GET_SEGMENT (fixP->fx_addsy) == seg)
7052 {
7053 /* Get pc relative value to go into the branch. */
7054 value = * val;
7055
7056 /* Permit a backward branch provided that enough bits
7057 are set. Allow a forwards branch, provided that
7058 enough bits are clear. */
7059 if ( (value & ~ ((offsetT) 0x1ffffff)) == ~ ((offsetT) 0x1ffffff)
7060 || (value & ~ ((offsetT) 0x1ffffff)) == 0)
7061 fixP->fx_done = 1;
7062 }
7063
7064 if (! fixP->fx_done)
7065 #endif
7066 as_bad_where (fixP->fx_file, fixP->fx_line,
7067 _("gas can't handle same-section branch dest >= 0x04000000"));
7068 }
7069
7070 value >>= 2;
7071 value += SEXT24 (newval);
7072
7073 if ( (value & ~ ((offsetT) 0xffffff)) != 0
7074 && ((value & ~ ((offsetT) 0xffffff)) != ~ ((offsetT) 0xffffff)))
7075 as_bad_where (fixP->fx_file, fixP->fx_line,
7076 _("out of range branch"));
7077
7078 newval = (value & 0x00ffffff) | (newval & 0xff000000);
7079 md_number_to_chars (buf, newval, INSN_SIZE);
7080 break;
7081
7082 case BFD_RELOC_ARM_PCREL_BLX:
7083 {
7084 offsetT hbit;
7085 newval = md_chars_to_number (buf, INSN_SIZE);
7086
7087 #ifdef OBJ_ELF
7088 if (! target_oabi)
7089 value = fixP->fx_offset;
7090 #endif
7091 hbit = (value >> 1) & 1;
7092 value = (value >> 2) & 0x00ffffff;
7093 value = (value + (newval & 0x00ffffff)) & 0x00ffffff;
7094 newval = value | (newval & 0xfe000000) | (hbit << 24);
7095 md_number_to_chars (buf, newval, INSN_SIZE);
7096 }
7097 break;
7098
7099 case BFD_RELOC_THUMB_PCREL_BRANCH9: /* Conditional branch. */
7100 newval = md_chars_to_number (buf, THUMB_SIZE);
7101 {
7102 addressT diff = (newval & 0xff) << 1;
7103 if (diff & 0x100)
7104 diff |= ~0xff;
7105
7106 value += diff;
7107 if ((value & ~0xff) && ((value & ~0xff) != ~0xff))
7108 as_bad_where (fixP->fx_file, fixP->fx_line,
7109 _("Branch out of range"));
7110 newval = (newval & 0xff00) | ((value & 0x1ff) >> 1);
7111 }
7112 md_number_to_chars (buf, newval, THUMB_SIZE);
7113 break;
7114
7115 case BFD_RELOC_THUMB_PCREL_BRANCH12: /* Unconditional branch. */
7116 newval = md_chars_to_number (buf, THUMB_SIZE);
7117 {
7118 addressT diff = (newval & 0x7ff) << 1;
7119 if (diff & 0x800)
7120 diff |= ~0x7ff;
7121
7122 value += diff;
7123 if ((value & ~0x7ff) && ((value & ~0x7ff) != ~0x7ff))
7124 as_bad_where (fixP->fx_file, fixP->fx_line,
7125 _("Branch out of range"));
7126 newval = (newval & 0xf800) | ((value & 0xfff) >> 1);
7127 }
7128 md_number_to_chars (buf, newval, THUMB_SIZE);
7129 break;
7130
7131 case BFD_RELOC_THUMB_PCREL_BLX:
7132 case BFD_RELOC_THUMB_PCREL_BRANCH23:
7133 {
7134 offsetT newval2;
7135 addressT diff;
7136
7137 newval = md_chars_to_number (buf, THUMB_SIZE);
7138 newval2 = md_chars_to_number (buf + THUMB_SIZE, THUMB_SIZE);
7139 diff = ((newval & 0x7ff) << 12) | ((newval2 & 0x7ff) << 1);
7140 if (diff & 0x400000)
7141 diff |= ~0x3fffff;
7142 #ifdef OBJ_ELF
7143 value = fixP->fx_offset;
7144 #endif
7145 value += diff;
7146 if ((value & ~0x3fffff) && ((value & ~0x3fffff) != ~0x3fffff))
7147 as_bad_where (fixP->fx_file, fixP->fx_line,
7148 _("Branch with link out of range"));
7149
7150 newval = (newval & 0xf800) | ((value & 0x7fffff) >> 12);
7151 newval2 = (newval2 & 0xf800) | ((value & 0xfff) >> 1);
7152 if (fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BLX)
7153 /* Remove bit zero of the adjusted offset. Bit zero can only be
7154 set if the upper insn is at a half-word boundary, since the
7155 destination address, an ARM instruction, must always be on a
7156 word boundary. The semantics of the BLX (1) instruction, however,
7157 are that bit zero in the offset must always be zero, and the
7158 corresponding bit one in the target address will be set from bit
7159 one of the source address. */
7160 newval2 &= ~1;
7161 md_number_to_chars (buf, newval, THUMB_SIZE);
7162 md_number_to_chars (buf + THUMB_SIZE, newval2, THUMB_SIZE);
7163 }
7164 break;
7165
7166 case BFD_RELOC_8:
7167 if (fixP->fx_done || fixP->fx_pcrel)
7168 md_number_to_chars (buf, value, 1);
7169 #ifdef OBJ_ELF
7170 else if (!target_oabi)
7171 {
7172 value = fixP->fx_offset;
7173 md_number_to_chars (buf, value, 1);
7174 }
7175 #endif
7176 break;
7177
7178 case BFD_RELOC_16:
7179 if (fixP->fx_done || fixP->fx_pcrel)
7180 md_number_to_chars (buf, value, 2);
7181 #ifdef OBJ_ELF
7182 else if (!target_oabi)
7183 {
7184 value = fixP->fx_offset;
7185 md_number_to_chars (buf, value, 2);
7186 }
7187 #endif
7188 break;
7189
7190 #ifdef OBJ_ELF
7191 case BFD_RELOC_ARM_GOT32:
7192 case BFD_RELOC_ARM_GOTOFF:
7193 md_number_to_chars (buf, 0, 4);
7194 break;
7195 #endif
7196
7197 case BFD_RELOC_RVA:
7198 case BFD_RELOC_32:
7199 if (fixP->fx_done || fixP->fx_pcrel)
7200 md_number_to_chars (buf, value, 4);
7201 #ifdef OBJ_ELF
7202 else if (!target_oabi)
7203 {
7204 value = fixP->fx_offset;
7205 md_number_to_chars (buf, value, 4);
7206 }
7207 #endif
7208 break;
7209
7210 #ifdef OBJ_ELF
7211 case BFD_RELOC_ARM_PLT32:
7212 /* It appears the instruction is fully prepared at this point. */
7213 break;
7214 #endif
7215
7216 case BFD_RELOC_ARM_GOTPC:
7217 md_number_to_chars (buf, value, 4);
7218 break;
7219
7220 case BFD_RELOC_ARM_CP_OFF_IMM:
7221 sign = value >= 0;
7222 if (value < -1023 || value > 1023 || (value & 3))
7223 as_bad_where (fixP->fx_file, fixP->fx_line,
7224 _("Illegal value for co-processor offset"));
7225 if (value < 0)
7226 value = -value;
7227 newval = md_chars_to_number (buf, INSN_SIZE) & 0xff7fff00;
7228 newval |= (value >> 2) | (sign ? INDEX_UP : 0);
7229 md_number_to_chars (buf, newval, INSN_SIZE);
7230 break;
7231
7232 case BFD_RELOC_ARM_THUMB_OFFSET:
7233 newval = md_chars_to_number (buf, THUMB_SIZE);
7234 /* Exactly what ranges, and where the offset is inserted depends
7235 on the type of instruction, we can establish this from the
7236 top 4 bits. */
7237 switch (newval >> 12)
7238 {
7239 case 4: /* PC load. */
7240 /* Thumb PC loads are somewhat odd, bit 1 of the PC is
7241 forced to zero for these loads, so we will need to round
7242 up the offset if the instruction address is not word
7243 aligned (since the final address produced must be, and
7244 we can only describe word-aligned immediate offsets). */
7245
7246 if ((fixP->fx_frag->fr_address + fixP->fx_where + value) & 3)
7247 as_bad_where (fixP->fx_file, fixP->fx_line,
7248 _("Invalid offset, target not word aligned (0x%08X)"),
7249 (unsigned int) (fixP->fx_frag->fr_address
7250 + fixP->fx_where + value));
7251
7252 if ((value + 2) & ~0x3fe)
7253 as_bad_where (fixP->fx_file, fixP->fx_line,
7254 _("Invalid offset, value too big (0x%08lX)"), value);
7255
7256 /* Round up, since pc will be rounded down. */
7257 newval |= (value + 2) >> 2;
7258 break;
7259
7260 case 9: /* SP load/store. */
7261 if (value & ~0x3fc)
7262 as_bad_where (fixP->fx_file, fixP->fx_line,
7263 _("Invalid offset, value too big (0x%08lX)"), value);
7264 newval |= value >> 2;
7265 break;
7266
7267 case 6: /* Word load/store. */
7268 if (value & ~0x7c)
7269 as_bad_where (fixP->fx_file, fixP->fx_line,
7270 _("Invalid offset, value too big (0x%08lX)"), value);
7271 newval |= value << 4; /* 6 - 2. */
7272 break;
7273
7274 case 7: /* Byte load/store. */
7275 if (value & ~0x1f)
7276 as_bad_where (fixP->fx_file, fixP->fx_line,
7277 _("Invalid offset, value too big (0x%08lX)"), value);
7278 newval |= value << 6;
7279 break;
7280
7281 case 8: /* Halfword load/store. */
7282 if (value & ~0x3e)
7283 as_bad_where (fixP->fx_file, fixP->fx_line,
7284 _("Invalid offset, value too big (0x%08lX)"), value);
7285 newval |= value << 5; /* 6 - 1. */
7286 break;
7287
7288 default:
7289 as_bad_where (fixP->fx_file, fixP->fx_line,
7290 "Unable to process relocation for thumb opcode: %lx",
7291 (unsigned long) newval);
7292 break;
7293 }
7294 md_number_to_chars (buf, newval, THUMB_SIZE);
7295 break;
7296
7297 case BFD_RELOC_ARM_THUMB_ADD:
7298 /* This is a complicated relocation, since we use it for all of
7299 the following immediate relocations:
7300
7301 3bit ADD/SUB
7302 8bit ADD/SUB
7303 9bit ADD/SUB SP word-aligned
7304 10bit ADD PC/SP word-aligned
7305
7306 The type of instruction being processed is encoded in the
7307 instruction field:
7308
7309 0x8000 SUB
7310 0x00F0 Rd
7311 0x000F Rs
7312 */
7313 newval = md_chars_to_number (buf, THUMB_SIZE);
7314 {
7315 int rd = (newval >> 4) & 0xf;
7316 int rs = newval & 0xf;
7317 int subtract = newval & 0x8000;
7318
7319 if (rd == REG_SP)
7320 {
7321 if (value & ~0x1fc)
7322 as_bad_where (fixP->fx_file, fixP->fx_line,
7323 _("Invalid immediate for stack address calculation"));
7324 newval = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST;
7325 newval |= value >> 2;
7326 }
7327 else if (rs == REG_PC || rs == REG_SP)
7328 {
7329 if (subtract ||
7330 value & ~0x3fc)
7331 as_bad_where (fixP->fx_file, fixP->fx_line,
7332 _("Invalid immediate for address calculation (value = 0x%08lX)"),
7333 (unsigned long) value);
7334 newval = (rs == REG_PC ? T_OPCODE_ADD_PC : T_OPCODE_ADD_SP);
7335 newval |= rd << 8;
7336 newval |= value >> 2;
7337 }
7338 else if (rs == rd)
7339 {
7340 if (value & ~0xff)
7341 as_bad_where (fixP->fx_file, fixP->fx_line,
7342 _("Invalid 8bit immediate"));
7343 newval = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8;
7344 newval |= (rd << 8) | value;
7345 }
7346 else
7347 {
7348 if (value & ~0x7)
7349 as_bad_where (fixP->fx_file, fixP->fx_line,
7350 _("Invalid 3bit immediate"));
7351 newval = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3;
7352 newval |= rd | (rs << 3) | (value << 6);
7353 }
7354 }
7355 md_number_to_chars (buf, newval, THUMB_SIZE);
7356 break;
7357
7358 case BFD_RELOC_ARM_THUMB_IMM:
7359 newval = md_chars_to_number (buf, THUMB_SIZE);
7360 switch (newval >> 11)
7361 {
7362 case 0x04: /* 8bit immediate MOV. */
7363 case 0x05: /* 8bit immediate CMP. */
7364 if (value < 0 || value > 255)
7365 as_bad_where (fixP->fx_file, fixP->fx_line,
7366 _("Invalid immediate: %ld is too large"),
7367 (long) value);
7368 newval |= value;
7369 break;
7370
7371 default:
7372 abort ();
7373 }
7374 md_number_to_chars (buf, newval, THUMB_SIZE);
7375 break;
7376
7377 case BFD_RELOC_ARM_THUMB_SHIFT:
7378 /* 5bit shift value (0..31). */
7379 if (value < 0 || value > 31)
7380 as_bad_where (fixP->fx_file, fixP->fx_line,
7381 _("Illegal Thumb shift value: %ld"), (long) value);
7382 newval = md_chars_to_number (buf, THUMB_SIZE) & 0xf03f;
7383 newval |= value << 6;
7384 md_number_to_chars (buf, newval, THUMB_SIZE);
7385 break;
7386
7387 case BFD_RELOC_VTABLE_INHERIT:
7388 case BFD_RELOC_VTABLE_ENTRY:
7389 fixP->fx_done = 0;
7390 return 1;
7391
7392 case BFD_RELOC_NONE:
7393 default:
7394 as_bad_where (fixP->fx_file, fixP->fx_line,
7395 _("Bad relocation fixup type (%d)"), fixP->fx_r_type);
7396 }
7397
7398 return 1;
7399 }
7400
7401 /* Translate internal representation of relocation info to BFD target
7402 format. */
7403
7404 arelent *
7405 tc_gen_reloc (section, fixp)
7406 asection * section ATTRIBUTE_UNUSED;
7407 fixS * fixp;
7408 {
7409 arelent * reloc;
7410 bfd_reloc_code_real_type code;
7411
7412 reloc = (arelent *) xmalloc (sizeof (arelent));
7413
7414 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
7415 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
7416 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
7417
7418 /* @@ Why fx_addnumber sometimes and fx_offset other times? */
7419 #ifndef OBJ_ELF
7420 if (fixp->fx_pcrel == 0)
7421 reloc->addend = fixp->fx_offset;
7422 else
7423 reloc->addend = fixp->fx_offset = reloc->address;
7424 #else /* OBJ_ELF */
7425 reloc->addend = fixp->fx_offset;
7426 #endif
7427
7428 switch (fixp->fx_r_type)
7429 {
7430 case BFD_RELOC_8:
7431 if (fixp->fx_pcrel)
7432 {
7433 code = BFD_RELOC_8_PCREL;
7434 break;
7435 }
7436
7437 case BFD_RELOC_16:
7438 if (fixp->fx_pcrel)
7439 {
7440 code = BFD_RELOC_16_PCREL;
7441 break;
7442 }
7443
7444 case BFD_RELOC_32:
7445 if (fixp->fx_pcrel)
7446 {
7447 code = BFD_RELOC_32_PCREL;
7448 break;
7449 }
7450
7451 case BFD_RELOC_ARM_PCREL_BRANCH:
7452 case BFD_RELOC_ARM_PCREL_BLX:
7453 case BFD_RELOC_RVA:
7454 case BFD_RELOC_THUMB_PCREL_BRANCH9:
7455 case BFD_RELOC_THUMB_PCREL_BRANCH12:
7456 case BFD_RELOC_THUMB_PCREL_BRANCH23:
7457 case BFD_RELOC_THUMB_PCREL_BLX:
7458 case BFD_RELOC_VTABLE_ENTRY:
7459 case BFD_RELOC_VTABLE_INHERIT:
7460 code = fixp->fx_r_type;
7461 break;
7462
7463 case BFD_RELOC_ARM_LITERAL:
7464 case BFD_RELOC_ARM_HWLITERAL:
7465 /* If this is called then the a literal has been referenced across
7466 a section boundary - possibly due to an implicit dump. */
7467 as_bad_where (fixp->fx_file, fixp->fx_line,
7468 _("Literal referenced across section boundary (Implicit dump?)"));
7469 return NULL;
7470
7471 #ifdef OBJ_ELF
7472 case BFD_RELOC_ARM_GOT32:
7473 case BFD_RELOC_ARM_GOTOFF:
7474 case BFD_RELOC_ARM_PLT32:
7475 code = fixp->fx_r_type;
7476 break;
7477 #endif
7478
7479 case BFD_RELOC_ARM_IMMEDIATE:
7480 as_bad_where (fixp->fx_file, fixp->fx_line,
7481 _("Internal_relocation (type %d) not fixed up (IMMEDIATE)"),
7482 fixp->fx_r_type);
7483 return NULL;
7484
7485 case BFD_RELOC_ARM_ADRL_IMMEDIATE:
7486 as_bad_where (fixp->fx_file, fixp->fx_line,
7487 _("ADRL used for a symbol not defined in the same file"));
7488 return NULL;
7489
7490 case BFD_RELOC_ARM_OFFSET_IMM:
7491 as_bad_where (fixp->fx_file, fixp->fx_line,
7492 _("Internal_relocation (type %d) not fixed up (OFFSET_IMM)"),
7493 fixp->fx_r_type);
7494 return NULL;
7495
7496 default:
7497 {
7498 char * type;
7499
7500 switch (fixp->fx_r_type)
7501 {
7502 case BFD_RELOC_ARM_IMMEDIATE: type = "IMMEDIATE"; break;
7503 case BFD_RELOC_ARM_OFFSET_IMM: type = "OFFSET_IMM"; break;
7504 case BFD_RELOC_ARM_OFFSET_IMM8: type = "OFFSET_IMM8"; break;
7505 case BFD_RELOC_ARM_SHIFT_IMM: type = "SHIFT_IMM"; break;
7506 case BFD_RELOC_ARM_SWI: type = "SWI"; break;
7507 case BFD_RELOC_ARM_MULTI: type = "MULTI"; break;
7508 case BFD_RELOC_ARM_CP_OFF_IMM: type = "CP_OFF_IMM"; break;
7509 case BFD_RELOC_ARM_THUMB_ADD: type = "THUMB_ADD"; break;
7510 case BFD_RELOC_ARM_THUMB_SHIFT: type = "THUMB_SHIFT"; break;
7511 case BFD_RELOC_ARM_THUMB_IMM: type = "THUMB_IMM"; break;
7512 case BFD_RELOC_ARM_THUMB_OFFSET: type = "THUMB_OFFSET"; break;
7513 default: type = _("<unknown>"); break;
7514 }
7515 as_bad_where (fixp->fx_file, fixp->fx_line,
7516 _("Cannot represent %s relocation in this object file format"),
7517 type);
7518 return NULL;
7519 }
7520 }
7521
7522 #ifdef OBJ_ELF
7523 if (code == BFD_RELOC_32_PCREL
7524 && GOT_symbol
7525 && fixp->fx_addsy == GOT_symbol)
7526 {
7527 code = BFD_RELOC_ARM_GOTPC;
7528 reloc->addend = fixp->fx_offset = reloc->address;
7529 }
7530 #endif
7531
7532 reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
7533
7534 if (reloc->howto == NULL)
7535 {
7536 as_bad_where (fixp->fx_file, fixp->fx_line,
7537 _("Can not represent %s relocation in this object file format"),
7538 bfd_get_reloc_code_name (code));
7539 return NULL;
7540 }
7541
7542 /* HACK: Since arm ELF uses Rel instead of Rela, encode the
7543 vtable entry to be used in the relocation's section offset. */
7544 if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
7545 reloc->address = fixp->fx_offset;
7546
7547 return reloc;
7548 }
7549
7550 int
7551 md_estimate_size_before_relax (fragP, segtype)
7552 fragS * fragP ATTRIBUTE_UNUSED;
7553 segT segtype ATTRIBUTE_UNUSED;
7554 {
7555 as_fatal (_("md_estimate_size_before_relax\n"));
7556 return 1;
7557 }
7558
7559 static void
7560 output_inst PARAMS ((void))
7561 {
7562 char * to = NULL;
7563
7564 if (inst.error)
7565 {
7566 as_bad (inst.error);
7567 return;
7568 }
7569
7570 to = frag_more (inst.size);
7571
7572 if (thumb_mode && (inst.size > THUMB_SIZE))
7573 {
7574 assert (inst.size == (2 * THUMB_SIZE));
7575 md_number_to_chars (to, inst.instruction >> 16, THUMB_SIZE);
7576 md_number_to_chars (to + THUMB_SIZE, inst.instruction, THUMB_SIZE);
7577 }
7578 else if (inst.size > INSN_SIZE)
7579 {
7580 assert (inst.size == (2 * INSN_SIZE));
7581 md_number_to_chars (to, inst.instruction, INSN_SIZE);
7582 md_number_to_chars (to + INSN_SIZE, inst.instruction, INSN_SIZE);
7583 }
7584 else
7585 md_number_to_chars (to, inst.instruction, inst.size);
7586
7587 if (inst.reloc.type != BFD_RELOC_NONE)
7588 fix_new_arm (frag_now, to - frag_now->fr_literal,
7589 inst.size, & inst.reloc.exp, inst.reloc.pc_rel,
7590 inst.reloc.type);
7591
7592 #ifdef OBJ_ELF
7593 dwarf2_emit_insn (inst.size);
7594 #endif
7595 }
7596
7597 void
7598 md_assemble (str)
7599 char * str;
7600 {
7601 char c;
7602 char * p;
7603 char * q;
7604 char * start;
7605
7606 /* Align the instruction.
7607 This may not be the right thing to do but ... */
7608 #if 0
7609 arm_align (2, 0);
7610 #endif
7611 listing_prev_line (); /* Defined in listing.h. */
7612
7613 /* Align the previous label if needed. */
7614 if (last_label_seen != NULL)
7615 {
7616 symbol_set_frag (last_label_seen, frag_now);
7617 S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ());
7618 S_SET_SEGMENT (last_label_seen, now_seg);
7619 }
7620
7621 memset (&inst, '\0', sizeof (inst));
7622 inst.reloc.type = BFD_RELOC_NONE;
7623
7624 skip_whitespace (str);
7625
7626 /* Scan up to the end of the op-code, which must end in white space or
7627 end of string. */
7628 for (start = p = str; *p != '\0'; p++)
7629 if (*p == ' ')
7630 break;
7631
7632 if (p == str)
7633 {
7634 as_bad (_("No operator -- statement `%s'\n"), str);
7635 return;
7636 }
7637
7638 if (thumb_mode)
7639 {
7640 CONST struct thumb_opcode * opcode;
7641
7642 c = *p;
7643 *p = '\0';
7644 opcode = (CONST struct thumb_opcode *) hash_find (arm_tops_hsh, str);
7645 *p = c;
7646
7647 if (opcode)
7648 {
7649 /* Check that this instruction is supported for this CPU. */
7650 if (thumb_mode == 1 && (opcode->variants & cpu_variant) == 0)
7651 {
7652 as_bad (_("selected processor does not support this opcode"));
7653 return;
7654 }
7655
7656 inst.instruction = opcode->value;
7657 inst.size = opcode->size;
7658 (*opcode->parms) (p);
7659 output_inst ();
7660 return;
7661 }
7662 }
7663 else
7664 {
7665 CONST struct asm_opcode * opcode;
7666 unsigned long cond_code;
7667
7668 inst.size = INSN_SIZE;
7669 /* P now points to the end of the opcode, probably white space, but we
7670 have to break the opcode up in case it contains condionals and flags;
7671 keep trying with progressively smaller basic instructions until one
7672 matches, or we run out of opcode. */
7673 q = (p - str > LONGEST_INST) ? str + LONGEST_INST : p;
7674
7675 for (; q != str; q--)
7676 {
7677 c = *q;
7678 *q = '\0';
7679
7680 opcode = (CONST struct asm_opcode *) hash_find (arm_ops_hsh, str);
7681 *q = c;
7682
7683 if (opcode && opcode->template)
7684 {
7685 unsigned long flag_bits = 0;
7686 char * r;
7687
7688 /* Check that this instruction is supported for this CPU. */
7689 if ((opcode->variants & cpu_variant) == 0)
7690 goto try_shorter;
7691
7692 inst.instruction = opcode->value;
7693 if (q == p) /* Just a simple opcode. */
7694 {
7695 if (opcode->comp_suffix)
7696 {
7697 if (*opcode->comp_suffix != '\0')
7698 as_bad (_("Opcode `%s' must have suffix from list: <%s>"),
7699 str, opcode->comp_suffix);
7700 else
7701 /* Not a conditional instruction. */
7702 (*opcode->parms) (q, 0);
7703 }
7704 else
7705 {
7706 /* A conditional instruction with default condition. */
7707 inst.instruction |= COND_ALWAYS;
7708 (*opcode->parms) (q, 0);
7709 }
7710 output_inst ();
7711 return;
7712 }
7713
7714 /* Not just a simple opcode. Check if extra is a
7715 conditional. */
7716 r = q;
7717 if (p - r >= 2)
7718 {
7719 CONST struct asm_cond *cond;
7720 char d = *(r + 2);
7721
7722 *(r + 2) = '\0';
7723 cond = (CONST struct asm_cond *) hash_find (arm_cond_hsh, r);
7724 *(r + 2) = d;
7725 if (cond)
7726 {
7727 if (cond->value == 0xf0000000)
7728 as_tsktsk (
7729 _("Warning: Use of the 'nv' conditional is deprecated\n"));
7730
7731 cond_code = cond->value;
7732 r += 2;
7733 }
7734 else
7735 cond_code = COND_ALWAYS;
7736 }
7737 else
7738 cond_code = COND_ALWAYS;
7739
7740 /* Apply the conditional, or complain it's not allowed. */
7741 if (opcode->comp_suffix && *opcode->comp_suffix == '\0')
7742 {
7743 /* Instruction isn't conditional. */
7744 if (cond_code != COND_ALWAYS)
7745 {
7746 as_bad (_("Opcode `%s' is unconditional\n"), str);
7747 return;
7748 }
7749 }
7750 else
7751 /* Instruction is conditional: set the condition into it. */
7752 inst.instruction |= cond_code;
7753
7754 /* If there is a compulsory suffix, it should come here
7755 before any optional flags. */
7756 if (opcode->comp_suffix && *opcode->comp_suffix != '\0')
7757 {
7758 CONST char *s = opcode->comp_suffix;
7759
7760 while (*s)
7761 {
7762 inst.suffix++;
7763 if (*r == *s)
7764 break;
7765 s++;
7766 }
7767
7768 if (*s == '\0')
7769 {
7770 as_bad (_("Opcode `%s' must have suffix from <%s>\n"),
7771 str, opcode->comp_suffix);
7772 return;
7773 }
7774
7775 r++;
7776 }
7777
7778 /* The remainder, if any should now be flags for the instruction;
7779 Scan these checking each one found with the opcode. */
7780 if (r != p)
7781 {
7782 char d;
7783 CONST struct asm_flg *flag = opcode->flags;
7784
7785 if (flag)
7786 {
7787 int flagno;
7788
7789 d = *p;
7790 *p = '\0';
7791
7792 for (flagno = 0; flag[flagno].template; flagno++)
7793 {
7794 if (streq (r, flag[flagno].template))
7795 {
7796 flag_bits |= flag[flagno].set_bits;
7797 break;
7798 }
7799 }
7800
7801 *p = d;
7802 if (! flag[flagno].template)
7803 goto try_shorter;
7804 }
7805 else
7806 goto try_shorter;
7807 }
7808
7809 (*opcode->parms) (p, flag_bits);
7810 output_inst ();
7811 return;
7812 }
7813
7814 try_shorter:
7815 ;
7816 }
7817 }
7818
7819 /* It wasn't an instruction, but it might be a register alias of the form
7820 alias .req reg. */
7821 q = p;
7822 skip_whitespace (q);
7823
7824 c = *p;
7825 *p = '\0';
7826
7827 if (*q && !strncmp (q, ".req ", 4))
7828 {
7829 int reg;
7830 char * copy_of_str;
7831 char * r;
7832
7833 #ifdef IGNORE_OPCODE_CASE
7834 str = original_case_string;
7835 #endif
7836 copy_of_str = str;
7837
7838 q += 4;
7839 skip_whitespace (q);
7840
7841 for (r = q; *r != '\0'; r++)
7842 if (*r == ' ')
7843 break;
7844
7845 if (r != q)
7846 {
7847 int regnum;
7848 char d = *r;
7849
7850 *r = '\0';
7851 regnum = arm_reg_parse (& q);
7852 *r = d;
7853
7854 reg = arm_reg_parse (& str);
7855
7856 if (reg == FAIL)
7857 {
7858 if (regnum != FAIL)
7859 insert_reg_alias (str, regnum);
7860 else
7861 as_warn (_("register '%s' does not exist\n"), q);
7862 }
7863 else if (regnum != FAIL)
7864 {
7865 if (reg != regnum)
7866 as_warn (_("ignoring redefinition of register alias '%s'"),
7867 copy_of_str);
7868
7869 /* Do not warn about redefinitions to the same alias. */
7870 }
7871 else
7872 as_warn (_("ignoring redefinition of register alias '%s' to non-existant register '%s'"),
7873 copy_of_str, q);
7874 }
7875 else
7876 as_warn (_("ignoring incomplete .req pseuso op"));
7877
7878 *p = c;
7879 return;
7880 }
7881
7882 *p = c;
7883 as_bad (_("bad instruction `%s'"), start);
7884 }
7885
7886 /* md_parse_option
7887 Invocation line includes a switch not recognized by the base assembler.
7888 See if it's a processor-specific option. These are:
7889 Cpu variants, the arm part is optional:
7890 -m[arm]1 Currently not supported.
7891 -m[arm]2, -m[arm]250 Arm 2 and Arm 250 processor
7892 -m[arm]3 Arm 3 processor
7893 -m[arm]6[xx], Arm 6 processors
7894 -m[arm]7[xx][t][[d]m] Arm 7 processors
7895 -m[arm]8[10] Arm 8 processors
7896 -m[arm]9[20][tdmi] Arm 9 processors
7897 -mstrongarm[110[0]] StrongARM processors
7898 -mxscale XScale processors
7899 -m[arm]v[2345[t[e]]] Arm architectures
7900 -mall All (except the ARM1)
7901 FP variants:
7902 -mfpa10, -mfpa11 FPA10 and 11 co-processor instructions
7903 -mfpe-old (No float load/store multiples)
7904 -mno-fpu Disable all floating point instructions
7905 Run-time endian selection:
7906 -EB big endian cpu
7907 -EL little endian cpu
7908 ARM Procedure Calling Standard:
7909 -mapcs-32 32 bit APCS
7910 -mapcs-26 26 bit APCS
7911 -mapcs-float Pass floats in float regs
7912 -mapcs-reentrant Position independent code
7913 -mthumb-interwork Code supports Arm/Thumb interworking
7914 -matpcs ARM/Thumb Procedure Call Standard
7915 -moabi Old ELF ABI */
7916
7917 CONST char * md_shortopts = "m:k";
7918
7919 struct option md_longopts[] =
7920 {
7921 #ifdef ARM_BI_ENDIAN
7922 #define OPTION_EB (OPTION_MD_BASE + 0)
7923 {"EB", no_argument, NULL, OPTION_EB},
7924 #define OPTION_EL (OPTION_MD_BASE + 1)
7925 {"EL", no_argument, NULL, OPTION_EL},
7926 #ifdef OBJ_ELF
7927 #define OPTION_OABI (OPTION_MD_BASE +2)
7928 {"oabi", no_argument, NULL, OPTION_OABI},
7929 #endif
7930 #endif
7931 {NULL, no_argument, NULL, 0}
7932 };
7933
7934 size_t md_longopts_size = sizeof (md_longopts);
7935
7936 int
7937 md_parse_option (c, arg)
7938 int c;
7939 char * arg;
7940 {
7941 char * str = arg;
7942
7943 switch (c)
7944 {
7945 #ifdef ARM_BI_ENDIAN
7946 case OPTION_EB:
7947 target_big_endian = 1;
7948 break;
7949 case OPTION_EL:
7950 target_big_endian = 0;
7951 break;
7952 #endif
7953
7954 case 'm':
7955 switch (*str)
7956 {
7957 case 'f':
7958 if (streq (str, "fpa10"))
7959 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA10;
7960 else if (streq (str, "fpa11"))
7961 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA11;
7962 else if (streq (str, "fpe-old"))
7963 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_CORE;
7964 else
7965 goto bad;
7966 break;
7967
7968 case 'n':
7969 if (streq (str, "no-fpu"))
7970 cpu_variant &= ~FPU_ALL;
7971 break;
7972
7973 #ifdef OBJ_ELF
7974 case 'o':
7975 if (streq (str, "oabi"))
7976 target_oabi = true;
7977 break;
7978 #endif
7979
7980 case 't':
7981 /* Limit assembler to generating only Thumb instructions: */
7982 if (streq (str, "thumb"))
7983 {
7984 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_EXT_THUMB;
7985 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_NONE;
7986 thumb_mode = 1;
7987 }
7988 else if (streq (str, "thumb-interwork"))
7989 {
7990 if ((cpu_variant & ARM_EXT_THUMB) == 0)
7991 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V4T;
7992 #if defined OBJ_COFF || defined OBJ_ELF
7993 support_interwork = true;
7994 #endif
7995 }
7996 else
7997 goto bad;
7998 break;
7999
8000 default:
8001 if (streq (str, "all"))
8002 {
8003 cpu_variant = ARM_ALL | FPU_ALL;
8004 return 1;
8005 }
8006 #if defined OBJ_COFF || defined OBJ_ELF
8007 if (! strncmp (str, "apcs-", 5))
8008 {
8009 /* GCC passes on all command line options starting "-mapcs-..."
8010 to us, so we must parse them here. */
8011
8012 str += 5;
8013
8014 if (streq (str, "32"))
8015 {
8016 uses_apcs_26 = false;
8017 return 1;
8018 }
8019 else if (streq (str, "26"))
8020 {
8021 uses_apcs_26 = true;
8022 return 1;
8023 }
8024 else if (streq (str, "frame"))
8025 {
8026 /* Stack frames are being generated - does not affect
8027 linkage of code. */
8028 return 1;
8029 }
8030 else if (streq (str, "stack-check"))
8031 {
8032 /* Stack checking is being performed - does not affect
8033 linkage, but does require that the functions
8034 __rt_stkovf_split_small and __rt_stkovf_split_big be
8035 present in the final link. */
8036
8037 return 1;
8038 }
8039 else if (streq (str, "float"))
8040 {
8041 /* Floating point arguments are being passed in the floating
8042 point registers. This does affect linking, since this
8043 version of the APCS is incompatible with the version that
8044 passes floating points in the integer registers. */
8045
8046 uses_apcs_float = true;
8047 return 1;
8048 }
8049 else if (streq (str, "reentrant"))
8050 {
8051 /* Reentrant code has been generated. This does affect
8052 linking, since there is no point in linking reentrant/
8053 position independent code with absolute position code. */
8054 pic_code = true;
8055 return 1;
8056 }
8057
8058 as_bad (_("Unrecognised APCS switch -m%s"), arg);
8059 return 0;
8060 }
8061
8062 if (! strcmp (str, "atpcs"))
8063 {
8064 atpcs = true;
8065 return 1;
8066 }
8067 #endif
8068 /* Strip off optional "arm". */
8069 if (! strncmp (str, "arm", 3))
8070 str += 3;
8071
8072 switch (*str)
8073 {
8074 case '1':
8075 if (streq (str, "1"))
8076 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_1;
8077 else
8078 goto bad;
8079 break;
8080
8081 case '2':
8082 if (streq (str, "2"))
8083 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2;
8084 else if (streq (str, "250"))
8085 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_250;
8086 else
8087 goto bad;
8088 break;
8089
8090 case '3':
8091 if (streq (str, "3"))
8092 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3;
8093 else
8094 goto bad;
8095 break;
8096
8097 case '6':
8098 switch (strtol (str, NULL, 10))
8099 {
8100 case 6:
8101 case 60:
8102 case 600:
8103 case 610:
8104 case 620:
8105 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_6;
8106 break;
8107 default:
8108 goto bad;
8109 }
8110 break;
8111
8112 case '7':
8113 /* Eat the processor name. */
8114 switch (strtol (str, & str, 10))
8115 {
8116 case 7:
8117 case 70:
8118 case 700:
8119 case 710:
8120 case 720:
8121 case 7100:
8122 case 7500:
8123 break;
8124 default:
8125 goto bad;
8126 }
8127 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7;
8128 for (; *str; str++)
8129 {
8130 switch (*str)
8131 {
8132 case 't':
8133 cpu_variant |= ARM_ARCH_V4T;
8134 break;
8135
8136 case 'm':
8137 cpu_variant |= ARM_EXT_LONGMUL;
8138 break;
8139
8140 case 'f': /* fe => fp enabled cpu. */
8141 if (str[1] == 'e')
8142 ++ str;
8143 else
8144 goto bad;
8145
8146 case 'c': /* Left over from 710c processor name. */
8147 case 'd': /* Debug. */
8148 case 'i': /* Embedded ICE. */
8149 /* Included for completeness in ARM processor naming. */
8150 break;
8151
8152 default:
8153 goto bad;
8154 }
8155 }
8156 break;
8157
8158 case '8':
8159 if (streq (str, "8") || streq (str, "810"))
8160 cpu_variant = (cpu_variant & ~ARM_ANY)
8161 | ARM_8 | ARM_ARCH_V4;
8162 else
8163 goto bad;
8164 break;
8165
8166 case '9':
8167 if (streq (str, "9"))
8168 cpu_variant = (cpu_variant & ~ARM_ANY)
8169 | ARM_9 | ARM_ARCH_V4T;
8170 else if (streq (str, "920"))
8171 cpu_variant = (cpu_variant & ~ARM_ANY)
8172 | ARM_9 | ARM_ARCH_V4;
8173 else if (streq (str, "920t"))
8174 cpu_variant = (cpu_variant & ~ARM_ANY)
8175 | ARM_9 | ARM_ARCH_V4T;
8176 else if (streq (str, "9tdmi"))
8177 cpu_variant = (cpu_variant & ~ARM_ANY)
8178 | ARM_9 | ARM_ARCH_V4T;
8179 else
8180 goto bad;
8181 break;
8182
8183 case 's':
8184 if (streq (str, "strongarm")
8185 || streq (str, "strongarm110")
8186 || streq (str, "strongarm1100"))
8187 cpu_variant = (cpu_variant & ~ARM_ANY)
8188 | ARM_8 | ARM_ARCH_V4;
8189 else
8190 goto bad;
8191 break;
8192
8193 case 'x':
8194 if (streq (str, "xscale"))
8195 cpu_variant = ARM_9 | ARM_ARCH_XSCALE;
8196 else
8197 goto bad;
8198 break;
8199
8200 case 'v':
8201 /* Select variant based on architecture rather than
8202 processor. */
8203 switch (*++str)
8204 {
8205 case '2':
8206 switch (*++str)
8207 {
8208 case 'a':
8209 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3;
8210 break;
8211 case 0:
8212 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2;
8213 break;
8214 default:
8215 as_bad (_("Invalid architecture variant -m%s"), arg);
8216 break;
8217 }
8218 break;
8219
8220 case '3':
8221 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7;
8222
8223 switch (*++str)
8224 {
8225 case 'm': cpu_variant |= ARM_EXT_LONGMUL; break;
8226 case 0: break;
8227 default:
8228 as_bad (_("Invalid architecture variant -m%s"), arg);
8229 break;
8230 }
8231 break;
8232
8233 case '4':
8234 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7 | ARM_ARCH_V4;
8235
8236 switch (*++str)
8237 {
8238 case 't': cpu_variant |= ARM_EXT_THUMB; break;
8239 case 0: break;
8240 default:
8241 as_bad (_("Invalid architecture variant -m%s"), arg);
8242 break;
8243 }
8244 break;
8245
8246 case '5':
8247 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V5;
8248 switch (*++str)
8249 {
8250 case 't': cpu_variant |= ARM_EXT_THUMB; break;
8251 case 'e': cpu_variant |= ARM_EXT_V5E; break;
8252 case 0: break;
8253 default:
8254 as_bad (_("Invalid architecture variant -m%s"), arg);
8255 break;
8256 }
8257 break;
8258
8259 default:
8260 as_bad (_("Invalid architecture variant -m%s"), arg);
8261 break;
8262 }
8263 break;
8264
8265 default:
8266 bad:
8267 as_bad (_("Invalid processor variant -m%s"), arg);
8268 return 0;
8269 }
8270 }
8271 break;
8272
8273 #if defined OBJ_ELF || defined OBJ_COFF
8274 case 'k':
8275 pic_code = 1;
8276 break;
8277 #endif
8278
8279 default:
8280 return 0;
8281 }
8282
8283 return 1;
8284 }
8285
8286 void
8287 md_show_usage (fp)
8288 FILE * fp;
8289 {
8290 fprintf (fp, _("\
8291 ARM Specific Assembler Options:\n\
8292 -m[arm][<processor name>] select processor variant\n\
8293 -m[arm]v[2|2a|3|3m|4|4t|5[t][e]] select architecture variant\n\
8294 -mthumb only allow Thumb instructions\n\
8295 -mthumb-interwork mark the assembled code as supporting interworking\n\
8296 -mall allow any instruction\n\
8297 -mfpa10, -mfpa11 select floating point architecture\n\
8298 -mfpe-old don't allow floating-point multiple instructions\n\
8299 -mno-fpu don't allow any floating-point instructions.\n\
8300 -k generate PIC code.\n"));
8301 #if defined OBJ_COFF || defined OBJ_ELF
8302 fprintf (fp, _("\
8303 -mapcs-32, -mapcs-26 specify which ARM Procedure Calling Standard to use\n\
8304 -matpcs use ARM/Thumb Procedure Calling Standard\n\
8305 -mapcs-float floating point args are passed in FP regs\n\
8306 -mapcs-reentrant the code is position independent/reentrant\n"));
8307 #endif
8308 #ifdef OBJ_ELF
8309 fprintf (fp, _("\
8310 -moabi support the old ELF ABI\n"));
8311 #endif
8312 #ifdef ARM_BI_ENDIAN
8313 fprintf (fp, _("\
8314 -EB assemble code for a big endian cpu\n\
8315 -EL assemble code for a little endian cpu\n"));
8316 #endif
8317 }
8318
8319 /* We need to be able to fix up arbitrary expressions in some statements.
8320 This is so that we can handle symbols that are an arbitrary distance from
8321 the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask),
8322 which returns part of an address in a form which will be valid for
8323 a data instruction. We do this by pushing the expression into a symbol
8324 in the expr_section, and creating a fix for that. */
8325
8326 static void
8327 fix_new_arm (frag, where, size, exp, pc_rel, reloc)
8328 fragS * frag;
8329 int where;
8330 short int size;
8331 expressionS * exp;
8332 int pc_rel;
8333 int reloc;
8334 {
8335 fixS * new_fix;
8336 arm_fix_data * arm_data;
8337
8338 switch (exp->X_op)
8339 {
8340 case O_constant:
8341 case O_symbol:
8342 case O_add:
8343 case O_subtract:
8344 new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc);
8345 break;
8346
8347 default:
8348 new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0,
8349 pc_rel, reloc);
8350 break;
8351 }
8352
8353 /* Mark whether the fix is to a THUMB instruction, or an ARM
8354 instruction. */
8355 arm_data = (arm_fix_data *) obstack_alloc (& notes, sizeof (arm_fix_data));
8356 new_fix->tc_fix_data = (PTR) arm_data;
8357 arm_data->thumb_mode = thumb_mode;
8358
8359 return;
8360 }
8361
8362 /* This fix_new is called by cons via TC_CONS_FIX_NEW. */
8363
8364 void
8365 cons_fix_new_arm (frag, where, size, exp)
8366 fragS * frag;
8367 int where;
8368 int size;
8369 expressionS * exp;
8370 {
8371 bfd_reloc_code_real_type type;
8372 int pcrel = 0;
8373
8374 /* Pick a reloc.
8375 FIXME: @@ Should look at CPU word size. */
8376 switch (size)
8377 {
8378 case 1:
8379 type = BFD_RELOC_8;
8380 break;
8381 case 2:
8382 type = BFD_RELOC_16;
8383 break;
8384 case 4:
8385 default:
8386 type = BFD_RELOC_32;
8387 break;
8388 case 8:
8389 type = BFD_RELOC_64;
8390 break;
8391 }
8392
8393 fix_new_exp (frag, where, (int) size, exp, pcrel, type);
8394 }
8395
8396 /* A good place to do this, although this was probably not intended
8397 for this kind of use. We need to dump the literal pool before
8398 references are made to a null symbol pointer. */
8399
8400 void
8401 arm_cleanup ()
8402 {
8403 if (current_poolP == NULL)
8404 return;
8405
8406 /* Put it at the end of text section. */
8407 subseg_set (text_section, 0);
8408 s_ltorg (0);
8409 listing_prev_line ();
8410 }
8411
8412 void
8413 arm_start_line_hook ()
8414 {
8415 last_label_seen = NULL;
8416 }
8417
8418 void
8419 arm_frob_label (sym)
8420 symbolS * sym;
8421 {
8422 last_label_seen = sym;
8423
8424 ARM_SET_THUMB (sym, thumb_mode);
8425
8426 #if defined OBJ_COFF || defined OBJ_ELF
8427 ARM_SET_INTERWORK (sym, support_interwork);
8428 #endif
8429
8430 if (label_is_thumb_function_name)
8431 {
8432 /* When the address of a Thumb function is taken the bottom
8433 bit of that address should be set. This will allow
8434 interworking between Arm and Thumb functions to work
8435 correctly. */
8436
8437 THUMB_SET_FUNC (sym, 1);
8438
8439 label_is_thumb_function_name = false;
8440 }
8441 }
8442
8443 /* Adjust the symbol table. This marks Thumb symbols as distinct from
8444 ARM ones. */
8445
8446 void
8447 arm_adjust_symtab ()
8448 {
8449 #ifdef OBJ_COFF
8450 symbolS * sym;
8451
8452 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
8453 {
8454 if (ARM_IS_THUMB (sym))
8455 {
8456 if (THUMB_IS_FUNC (sym))
8457 {
8458 /* Mark the symbol as a Thumb function. */
8459 if ( S_GET_STORAGE_CLASS (sym) == C_STAT
8460 || S_GET_STORAGE_CLASS (sym) == C_LABEL) /* This can happen! */
8461 S_SET_STORAGE_CLASS (sym, C_THUMBSTATFUNC);
8462
8463 else if (S_GET_STORAGE_CLASS (sym) == C_EXT)
8464 S_SET_STORAGE_CLASS (sym, C_THUMBEXTFUNC);
8465 else
8466 as_bad (_("%s: unexpected function type: %d"),
8467 S_GET_NAME (sym), S_GET_STORAGE_CLASS (sym));
8468 }
8469 else switch (S_GET_STORAGE_CLASS (sym))
8470 {
8471 case C_EXT:
8472 S_SET_STORAGE_CLASS (sym, C_THUMBEXT);
8473 break;
8474 case C_STAT:
8475 S_SET_STORAGE_CLASS (sym, C_THUMBSTAT);
8476 break;
8477 case C_LABEL:
8478 S_SET_STORAGE_CLASS (sym, C_THUMBLABEL);
8479 break;
8480 default:
8481 /* Do nothing. */
8482 break;
8483 }
8484 }
8485
8486 if (ARM_IS_INTERWORK (sym))
8487 coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_flags = 0xFF;
8488 }
8489 #endif
8490 #ifdef OBJ_ELF
8491 symbolS * sym;
8492 char bind;
8493
8494 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
8495 {
8496 if (ARM_IS_THUMB (sym))
8497 {
8498 elf_symbol_type * elf_sym;
8499
8500 elf_sym = elf_symbol (symbol_get_bfdsym (sym));
8501 bind = ELF_ST_BIND (elf_sym);
8502
8503 /* If it's a .thumb_func, declare it as so,
8504 otherwise tag label as .code 16. */
8505 if (THUMB_IS_FUNC (sym))
8506 elf_sym->internal_elf_sym.st_info =
8507 ELF_ST_INFO (bind, STT_ARM_TFUNC);
8508 else
8509 elf_sym->internal_elf_sym.st_info =
8510 ELF_ST_INFO (bind, STT_ARM_16BIT);
8511 }
8512 }
8513 #endif
8514 }
8515
8516 int
8517 arm_data_in_code ()
8518 {
8519 if (thumb_mode && ! strncmp (input_line_pointer + 1, "data:", 5))
8520 {
8521 *input_line_pointer = '/';
8522 input_line_pointer += 5;
8523 *input_line_pointer = 0;
8524 return 1;
8525 }
8526
8527 return 0;
8528 }
8529
8530 char *
8531 arm_canonicalize_symbol_name (name)
8532 char * name;
8533 {
8534 int len;
8535
8536 if (thumb_mode && (len = strlen (name)) > 5
8537 && streq (name + len - 5, "/data"))
8538 *(name + len - 5) = 0;
8539
8540 return name;
8541 }
8542
8543 boolean
8544 arm_validate_fix (fixP)
8545 fixS * fixP;
8546 {
8547 /* If the destination of the branch is a defined symbol which does not have
8548 the THUMB_FUNC attribute, then we must be calling a function which has
8549 the (interfacearm) attribute. We look for the Thumb entry point to that
8550 function and change the branch to refer to that function instead. */
8551 if (fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23
8552 && fixP->fx_addsy != NULL
8553 && S_IS_DEFINED (fixP->fx_addsy)
8554 && ! THUMB_IS_FUNC (fixP->fx_addsy))
8555 {
8556 fixP->fx_addsy = find_real_start (fixP->fx_addsy);
8557 return true;
8558 }
8559
8560 return false;
8561 }
8562
8563 #ifdef OBJ_COFF
8564 /* This is a little hack to help the gas/arm/adrl.s test. It prevents
8565 local labels from being added to the output symbol table when they
8566 are used with the ADRL pseudo op. The ADRL relocation should always
8567 be resolved before the binbary is emitted, so it is safe to say that
8568 it is adjustable. */
8569
8570 boolean
8571 arm_fix_adjustable (fixP)
8572 fixS * fixP;
8573 {
8574 if (fixP->fx_r_type == BFD_RELOC_ARM_ADRL_IMMEDIATE)
8575 return 1;
8576 return 0;
8577 }
8578 #endif
8579 #ifdef OBJ_ELF
8580 /* Relocations against Thumb function names must be left unadjusted,
8581 so that the linker can use this information to correctly set the
8582 bottom bit of their addresses. The MIPS version of this function
8583 also prevents relocations that are mips-16 specific, but I do not
8584 know why it does this.
8585
8586 FIXME:
8587 There is one other problem that ought to be addressed here, but
8588 which currently is not: Taking the address of a label (rather
8589 than a function) and then later jumping to that address. Such
8590 addresses also ought to have their bottom bit set (assuming that
8591 they reside in Thumb code), but at the moment they will not. */
8592
8593 boolean
8594 arm_fix_adjustable (fixP)
8595 fixS * fixP;
8596 {
8597 if (fixP->fx_addsy == NULL)
8598 return 1;
8599
8600 /* Prevent all adjustments to global symbols. */
8601 if (S_IS_EXTERN (fixP->fx_addsy))
8602 return 0;
8603
8604 if (S_IS_WEAK (fixP->fx_addsy))
8605 return 0;
8606
8607 if (THUMB_IS_FUNC (fixP->fx_addsy)
8608 && fixP->fx_subsy == NULL)
8609 return 0;
8610
8611 /* We need the symbol name for the VTABLE entries. */
8612 if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
8613 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
8614 return 0;
8615
8616 return 1;
8617 }
8618
8619 const char *
8620 elf32_arm_target_format ()
8621 {
8622 if (target_big_endian)
8623 {
8624 if (target_oabi)
8625 return "elf32-bigarm-oabi";
8626 else
8627 return "elf32-bigarm";
8628 }
8629 else
8630 {
8631 if (target_oabi)
8632 return "elf32-littlearm-oabi";
8633 else
8634 return "elf32-littlearm";
8635 }
8636 }
8637
8638 void
8639 armelf_frob_symbol (symp, puntp)
8640 symbolS * symp;
8641 int * puntp;
8642 {
8643 elf_frob_symbol (symp, puntp);
8644 }
8645
8646 int
8647 arm_force_relocation (fixp)
8648 struct fix * fixp;
8649 {
8650 if ( fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
8651 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY
8652 || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH
8653 || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BLX
8654 || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BLX
8655 || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23)
8656 return 1;
8657
8658 return 0;
8659 }
8660
8661 static bfd_reloc_code_real_type
8662 arm_parse_reloc ()
8663 {
8664 char id [16];
8665 char * ip;
8666 unsigned int i;
8667 static struct
8668 {
8669 char * str;
8670 int len;
8671 bfd_reloc_code_real_type reloc;
8672 }
8673 reloc_map[] =
8674 {
8675 #define MAP(str,reloc) { str, sizeof (str) - 1, reloc }
8676 MAP ("(got)", BFD_RELOC_ARM_GOT32),
8677 MAP ("(gotoff)", BFD_RELOC_ARM_GOTOFF),
8678 /* ScottB: Jan 30, 1998 - Added support for parsing "var(PLT)"
8679 branch instructions generated by GCC for PLT relocs. */
8680 MAP ("(plt)", BFD_RELOC_ARM_PLT32),
8681 { NULL, 0, BFD_RELOC_UNUSED }
8682 #undef MAP
8683 };
8684
8685 for (i = 0, ip = input_line_pointer;
8686 i < sizeof (id) && (isalnum (*ip) || ispunct (*ip));
8687 i++, ip++)
8688 id[i] = tolower (*ip);
8689
8690 for (i = 0; reloc_map[i].str; i++)
8691 if (strncmp (id, reloc_map[i].str, reloc_map[i].len) == 0)
8692 break;
8693
8694 input_line_pointer += reloc_map[i].len;
8695
8696 return reloc_map[i].reloc;
8697 }
8698
8699 static void
8700 s_arm_elf_cons (nbytes)
8701 int nbytes;
8702 {
8703 expressionS exp;
8704
8705 #ifdef md_flush_pending_output
8706 md_flush_pending_output ();
8707 #endif
8708
8709 if (is_it_end_of_statement ())
8710 {
8711 demand_empty_rest_of_line ();
8712 return;
8713 }
8714
8715 #ifdef md_cons_align
8716 md_cons_align (nbytes);
8717 #endif
8718
8719 do
8720 {
8721 bfd_reloc_code_real_type reloc;
8722
8723 expression (& exp);
8724
8725 if (exp.X_op == O_symbol
8726 && * input_line_pointer == '('
8727 && (reloc = arm_parse_reloc ()) != BFD_RELOC_UNUSED)
8728 {
8729 reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, reloc);
8730 int size = bfd_get_reloc_size (howto);
8731
8732 if (size > nbytes)
8733 as_bad ("%s relocations do not fit in %d bytes",
8734 howto->name, nbytes);
8735 else
8736 {
8737 register char *p = frag_more ((int) nbytes);
8738 int offset = nbytes - size;
8739
8740 fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size,
8741 &exp, 0, reloc);
8742 }
8743 }
8744 else
8745 emit_expr (&exp, (unsigned int) nbytes);
8746 }
8747 while (*input_line_pointer++ == ',');
8748
8749 /* Put terminator back into stream. */
8750 input_line_pointer --;
8751 demand_empty_rest_of_line ();
8752 }
8753
8754 #endif /* OBJ_ELF */
GDB Binutils - Deliverables
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