projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* Makefile.in: Revert 2001-06-17.
[deliverable/binutils-gdb.git] / gas / config / tc-arm.c
1 /* tc-arm.c -- Assemble for the ARM
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
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
1283 if (literals[lit_count].exp.X_op == inst.reloc.exp.X_op
1284 && inst.reloc.exp.X_op == O_symbol
1285 && (literals[lit_count].exp.X_add_number
1286 == inst.reloc.exp.X_add_number)
1287 && (literals[lit_count].exp.X_add_symbol
1288 == inst.reloc.exp.X_add_symbol)
1289 && (literals[lit_count].exp.X_op_symbol
1290 == inst.reloc.exp.X_op_symbol))
1291 break;
1292
1293 lit_count++;
1294 }
1295
1296 if (lit_count == next_literal_pool_place) /* New entry. */
1297 {
1298 if (next_literal_pool_place >= MAX_LITERAL_POOL_SIZE)
1299 {
1300 inst.error = _("Literal Pool Overflow");
1301 return FAIL;
1302 }
1303
1304 literals[next_literal_pool_place].exp = inst.reloc.exp;
1305 lit_count = next_literal_pool_place++;
1306 }
1307
1308 inst.reloc.exp.X_op = O_symbol;
1309 inst.reloc.exp.X_add_number = (lit_count) * 4 - 8;
1310 inst.reloc.exp.X_add_symbol = current_poolP;
1311
1312 return SUCCESS;
1313 }
1314
1315 /* Can't use symbol_new here, so have to create a symbol and then at
1316 a later date assign it a value. Thats what these functions do. */
1317
1318 static void
1319 symbol_locate (symbolP, name, segment, valu, frag)
1320 symbolS * symbolP;
1321 CONST char * name; /* It is copied, the caller can modify. */
1322 segT segment; /* Segment identifier (SEG_<something>). */
1323 valueT valu; /* Symbol value. */
1324 fragS * frag; /* Associated fragment. */
1325 {
1326 unsigned int name_length;
1327 char * preserved_copy_of_name;
1328
1329 name_length = strlen (name) + 1; /* +1 for \0. */
1330 obstack_grow (&notes, name, name_length);
1331 preserved_copy_of_name = obstack_finish (&notes);
1332 #ifdef STRIP_UNDERSCORE
1333 if (preserved_copy_of_name[0] == '_')
1334 preserved_copy_of_name++;
1335 #endif
1336
1337 #ifdef tc_canonicalize_symbol_name
1338 preserved_copy_of_name =
1339 tc_canonicalize_symbol_name (preserved_copy_of_name);
1340 #endif
1341
1342 S_SET_NAME (symbolP, preserved_copy_of_name);
1343
1344 S_SET_SEGMENT (symbolP, segment);
1345 S_SET_VALUE (symbolP, valu);
1346 symbol_clear_list_pointers(symbolP);
1347
1348 symbol_set_frag (symbolP, frag);
1349
1350 /* Link to end of symbol chain. */
1351 {
1352 extern int symbol_table_frozen;
1353 if (symbol_table_frozen)
1354 abort ();
1355 }
1356
1357 symbol_append (symbolP, symbol_lastP, & symbol_rootP, & symbol_lastP);
1358
1359 obj_symbol_new_hook (symbolP);
1360
1361 #ifdef tc_symbol_new_hook
1362 tc_symbol_new_hook (symbolP);
1363 #endif
1364
1365 #ifdef DEBUG_SYMS
1366 verify_symbol_chain (symbol_rootP, symbol_lastP);
1367 #endif /* DEBUG_SYMS */
1368 }
1369
1370 /* Check that an immediate is valid.
1371 If so, convert it to the right format. */
1372
1373 static unsigned int
1374 validate_immediate (val)
1375 unsigned int val;
1376 {
1377 unsigned int a;
1378 unsigned int i;
1379
1380 #define rotate_left(v, n) (v << n | v >> (32 - n))
1381
1382 for (i = 0; i < 32; i += 2)
1383 if ((a = rotate_left (val, i)) <= 0xff)
1384 return a | (i << 7); /* 12-bit pack: [shift-cnt,const]. */
1385
1386 return FAIL;
1387 }
1388
1389 /* Check to see if an immediate can be computed as two seperate immediate
1390 values, added together. We already know that this value cannot be
1391 computed by just one ARM instruction. */
1392
1393 static unsigned int
1394 validate_immediate_twopart (val, highpart)
1395 unsigned int val;
1396 unsigned int * highpart;
1397 {
1398 unsigned int a;
1399 unsigned int i;
1400
1401 for (i = 0; i < 32; i += 2)
1402 if (((a = rotate_left (val, i)) & 0xff) != 0)
1403 {
1404 if (a & 0xff00)
1405 {
1406 if (a & ~ 0xffff)
1407 continue;
1408 * highpart = (a >> 8) | ((i + 24) << 7);
1409 }
1410 else if (a & 0xff0000)
1411 {
1412 if (a & 0xff000000)
1413 continue;
1414 * highpart = (a >> 16) | ((i + 16) << 7);
1415 }
1416 else
1417 {
1418 assert (a & 0xff000000);
1419 * highpart = (a >> 24) | ((i + 8) << 7);
1420 }
1421
1422 return (a & 0xff) | (i << 7);
1423 }
1424
1425 return FAIL;
1426 }
1427
1428 static int
1429 validate_offset_imm (val, hwse)
1430 unsigned int val;
1431 int hwse;
1432 {
1433 if ((hwse && val > 255) || val > 4095)
1434 return FAIL;
1435 return val;
1436 }
1437
1438 static void
1439 s_req (a)
1440 int a ATTRIBUTE_UNUSED;
1441 {
1442 as_bad (_("Invalid syntax for .req directive."));
1443 }
1444
1445 static void
1446 s_bss (ignore)
1447 int ignore ATTRIBUTE_UNUSED;
1448 {
1449 /* We don't support putting frags in the BSS segment, we fake it by
1450 marking in_bss, then looking at s_skip for clues. */
1451 subseg_set (bss_section, 0);
1452 demand_empty_rest_of_line ();
1453 }
1454
1455 static void
1456 s_even (ignore)
1457 int ignore ATTRIBUTE_UNUSED;
1458 {
1459 /* Never make frag if expect extra pass. */
1460 if (!need_pass_2)
1461 frag_align (1, 0, 0);
1462
1463 record_alignment (now_seg, 1);
1464
1465 demand_empty_rest_of_line ();
1466 }
1467
1468 static void
1469 s_ltorg (ignored)
1470 int ignored ATTRIBUTE_UNUSED;
1471 {
1472 int lit_count = 0;
1473 char sym_name[20];
1474
1475 if (current_poolP == NULL)
1476 return;
1477
1478 /* Align pool as you have word accesses.
1479 Only make a frag if we have to. */
1480 if (!need_pass_2)
1481 frag_align (2, 0, 0);
1482
1483 record_alignment (now_seg, 2);
1484
1485 sprintf (sym_name, "$$lit_\002%x", lit_pool_num++);
1486
1487 symbol_locate (current_poolP, sym_name, now_seg,
1488 (valueT) frag_now_fix (), frag_now);
1489 symbol_table_insert (current_poolP);
1490
1491 ARM_SET_THUMB (current_poolP, thumb_mode);
1492
1493 #if defined OBJ_COFF || defined OBJ_ELF
1494 ARM_SET_INTERWORK (current_poolP, support_interwork);
1495 #endif
1496
1497 while (lit_count < next_literal_pool_place)
1498 /* First output the expression in the instruction to the pool. */
1499 emit_expr (&(literals[lit_count++].exp), 4); /* .word */
1500
1501 next_literal_pool_place = 0;
1502 current_poolP = NULL;
1503 }
1504
1505 /* Same as s_align_ptwo but align 0 => align 2. */
1506
1507 static void
1508 s_align (unused)
1509 int unused ATTRIBUTE_UNUSED;
1510 {
1511 register int temp;
1512 register long temp_fill;
1513 long max_alignment = 15;
1514
1515 temp = get_absolute_expression ();
1516 if (temp > max_alignment)
1517 as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment);
1518 else if (temp < 0)
1519 {
1520 as_bad (_("Alignment negative. 0 assumed."));
1521 temp = 0;
1522 }
1523
1524 if (*input_line_pointer == ',')
1525 {
1526 input_line_pointer++;
1527 temp_fill = get_absolute_expression ();
1528 }
1529 else
1530 temp_fill = 0;
1531
1532 if (!temp)
1533 temp = 2;
1534
1535 /* Only make a frag if we HAVE to. */
1536 if (temp && !need_pass_2)
1537 frag_align (temp, (int) temp_fill, 0);
1538 demand_empty_rest_of_line ();
1539
1540 record_alignment (now_seg, temp);
1541 }
1542
1543 static void
1544 s_force_thumb (ignore)
1545 int ignore ATTRIBUTE_UNUSED;
1546 {
1547 /* If we are not already in thumb mode go into it, EVEN if
1548 the target processor does not support thumb instructions.
1549 This is used by gcc/config/arm/lib1funcs.asm for example
1550 to compile interworking support functions even if the
1551 target processor should not support interworking. */
1552 if (! thumb_mode)
1553 {
1554 thumb_mode = 2;
1555
1556 record_alignment (now_seg, 1);
1557 }
1558
1559 demand_empty_rest_of_line ();
1560 }
1561
1562 static void
1563 s_thumb_func (ignore)
1564 int ignore ATTRIBUTE_UNUSED;
1565 {
1566 if (! thumb_mode)
1567 opcode_select (16);
1568
1569 /* The following label is the name/address of the start of a Thumb function.
1570 We need to know this for the interworking support. */
1571 label_is_thumb_function_name = true;
1572
1573 demand_empty_rest_of_line ();
1574 }
1575
1576 /* Perform a .set directive, but also mark the alias as
1577 being a thumb function. */
1578
1579 static void
1580 s_thumb_set (equiv)
1581 int equiv;
1582 {
1583 /* XXX the following is a duplicate of the code for s_set() in read.c
1584 We cannot just call that code as we need to get at the symbol that
1585 is created. */
1586 register char * name;
1587 register char delim;
1588 register char * end_name;
1589 register symbolS * symbolP;
1590
1591 /* Especial apologies for the random logic:
1592 This just grew, and could be parsed much more simply!
1593 Dean - in haste. */
1594 name = input_line_pointer;
1595 delim = get_symbol_end ();
1596 end_name = input_line_pointer;
1597 *end_name = delim;
1598
1599 SKIP_WHITESPACE ();
1600
1601 if (*input_line_pointer != ',')
1602 {
1603 *end_name = 0;
1604 as_bad (_("Expected comma after name \"%s\""), name);
1605 *end_name = delim;
1606 ignore_rest_of_line ();
1607 return;
1608 }
1609
1610 input_line_pointer++;
1611 *end_name = 0;
1612
1613 if (name[0] == '.' && name[1] == '\0')
1614 {
1615 /* XXX - this should not happen to .thumb_set. */
1616 abort ();
1617 }
1618
1619 if ((symbolP = symbol_find (name)) == NULL
1620 && (symbolP = md_undefined_symbol (name)) == NULL)
1621 {
1622 #ifndef NO_LISTING
1623 /* When doing symbol listings, play games with dummy fragments living
1624 outside the normal fragment chain to record the file and line info
1625 for this symbol. */
1626 if (listing & LISTING_SYMBOLS)
1627 {
1628 extern struct list_info_struct * listing_tail;
1629 fragS * dummy_frag = (fragS *) xmalloc (sizeof (fragS));
1630
1631 memset (dummy_frag, 0, sizeof (fragS));
1632 dummy_frag->fr_type = rs_fill;
1633 dummy_frag->line = listing_tail;
1634 symbolP = symbol_new (name, undefined_section, 0, dummy_frag);
1635 dummy_frag->fr_symbol = symbolP;
1636 }
1637 else
1638 #endif
1639 symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag);
1640
1641 #ifdef OBJ_COFF
1642 /* "set" symbols are local unless otherwise specified. */
1643 SF_SET_LOCAL (symbolP);
1644 #endif /* OBJ_COFF */
1645 } /* Make a new symbol. */
1646
1647 symbol_table_insert (symbolP);
1648
1649 * end_name = delim;
1650
1651 if (equiv
1652 && S_IS_DEFINED (symbolP)
1653 && S_GET_SEGMENT (symbolP) != reg_section)
1654 as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP));
1655
1656 pseudo_set (symbolP);
1657
1658 demand_empty_rest_of_line ();
1659
1660 /* XXX Now we come to the Thumb specific bit of code. */
1661
1662 THUMB_SET_FUNC (symbolP, 1);
1663 ARM_SET_THUMB (symbolP, 1);
1664 #if defined OBJ_ELF || defined OBJ_COFF
1665 ARM_SET_INTERWORK (symbolP, support_interwork);
1666 #endif
1667 }
1668
1669 /* If we change section we must dump the literal pool first. */
1670
1671 static void
1672 arm_s_text (ignore)
1673 int ignore;
1674 {
1675 if (now_seg != text_section)
1676 s_ltorg (0);
1677
1678 #ifdef OBJ_ELF
1679 obj_elf_text (ignore);
1680 #else
1681 s_text (ignore);
1682 #endif
1683 }
1684
1685 static void
1686 arm_s_data (ignore)
1687 int ignore;
1688 {
1689 if (flag_readonly_data_in_text)
1690 {
1691 if (now_seg != text_section)
1692 s_ltorg (0);
1693 }
1694 else if (now_seg != data_section)
1695 s_ltorg (0);
1696
1697 #ifdef OBJ_ELF
1698 obj_elf_data (ignore);
1699 #else
1700 s_data (ignore);
1701 #endif
1702 }
1703
1704 #ifdef OBJ_ELF
1705 static void
1706 arm_s_section (ignore)
1707 int ignore;
1708 {
1709 s_ltorg (0);
1710
1711 obj_elf_section (ignore);
1712 }
1713 #endif
1714
1715 static void
1716 opcode_select (width)
1717 int width;
1718 {
1719 switch (width)
1720 {
1721 case 16:
1722 if (! thumb_mode)
1723 {
1724 if (! (cpu_variant & ARM_EXT_THUMB))
1725 as_bad (_("selected processor does not support THUMB opcodes"));
1726
1727 thumb_mode = 1;
1728 /* No need to force the alignment, since we will have been
1729 coming from ARM mode, which is word-aligned. */
1730 record_alignment (now_seg, 1);
1731 }
1732 break;
1733
1734 case 32:
1735 if (thumb_mode)
1736 {
1737 if ((cpu_variant & ARM_ANY) == ARM_EXT_THUMB)
1738 as_bad (_("selected processor does not support ARM opcodes"));
1739
1740 thumb_mode = 0;
1741
1742 if (!need_pass_2)
1743 frag_align (2, 0, 0);
1744
1745 record_alignment (now_seg, 1);
1746 }
1747 break;
1748
1749 default:
1750 as_bad (_("invalid instruction size selected (%d)"), width);
1751 }
1752 }
1753
1754 static void
1755 s_arm (ignore)
1756 int ignore ATTRIBUTE_UNUSED;
1757 {
1758 opcode_select (32);
1759 demand_empty_rest_of_line ();
1760 }
1761
1762 static void
1763 s_thumb (ignore)
1764 int ignore ATTRIBUTE_UNUSED;
1765 {
1766 opcode_select (16);
1767 demand_empty_rest_of_line ();
1768 }
1769
1770 static void
1771 s_code (unused)
1772 int unused ATTRIBUTE_UNUSED;
1773 {
1774 register int temp;
1775
1776 temp = get_absolute_expression ();
1777 switch (temp)
1778 {
1779 case 16:
1780 case 32:
1781 opcode_select (temp);
1782 break;
1783
1784 default:
1785 as_bad (_("invalid operand to .code directive (%d) (expecting 16 or 32)"), temp);
1786 }
1787 }
1788
1789 static void
1790 end_of_line (str)
1791 char * str;
1792 {
1793 skip_whitespace (str);
1794
1795 if (* str != '\0')
1796 inst.error = _("Garbage following instruction");
1797 }
1798
1799 static int
1800 skip_past_comma (str)
1801 char ** str;
1802 {
1803 char * p = * str, c;
1804 int comma = 0;
1805
1806 while ((c = *p) == ' ' || c == ',')
1807 {
1808 p++;
1809 if (c == ',' && comma++)
1810 return FAIL;
1811 }
1812
1813 if (c == '\0')
1814 return FAIL;
1815
1816 *str = p;
1817 return comma ? SUCCESS : FAIL;
1818 }
1819
1820 /* A standard register must be given at this point.
1821 SHIFT is the place to put it in inst.instruction.
1822 Restores input start point on error.
1823 Returns the reg#, or FAIL. */
1824
1825 static int
1826 reg_required_here (str, shift)
1827 char ** str;
1828 int shift;
1829 {
1830 static char buff [128]; /* XXX */
1831 int reg;
1832 char * start = * str;
1833
1834 if ((reg = arm_reg_parse (str)) != FAIL && int_register (reg))
1835 {
1836 if (shift >= 0)
1837 inst.instruction |= reg << shift;
1838 return reg;
1839 }
1840
1841 /* Restore the start point, we may have got a reg of the wrong class. */
1842 *str = start;
1843
1844 /* In the few cases where we might be able to accept something else
1845 this error can be overridden. */
1846 sprintf (buff, _("Register expected, not '%.100s'"), start);
1847 inst.error = buff;
1848
1849 return FAIL;
1850 }
1851
1852 static CONST struct asm_psr *
1853 arm_psr_parse (ccp)
1854 register char ** ccp;
1855 {
1856 char * start = * ccp;
1857 char c;
1858 char * p;
1859 CONST struct asm_psr * psr;
1860
1861 p = start;
1862
1863 /* Skip to the end of the next word in the input stream. */
1864 do
1865 {
1866 c = *p++;
1867 }
1868 while (isalpha (c) || c == '_');
1869
1870 /* Terminate the word. */
1871 *--p = 0;
1872
1873 /* CPSR's and SPSR's can now be lowercase. This is just a convenience
1874 feature for ease of use and backwards compatibility. */
1875 if (!strncmp (start, "cpsr", 4))
1876 strncpy (start, "CPSR", 4);
1877 else if (!strncmp (start, "spsr", 4))
1878 strncpy (start, "SPSR", 4);
1879
1880 /* Now locate the word in the psr hash table. */
1881 psr = (CONST struct asm_psr *) hash_find (arm_psr_hsh, start);
1882
1883 /* Restore the input stream. */
1884 *p = c;
1885
1886 /* If we found a valid match, advance the
1887 stream pointer past the end of the word. */
1888 *ccp = p;
1889
1890 return psr;
1891 }
1892
1893 /* Parse the input looking for a PSR flag. */
1894
1895 static int
1896 psr_required_here (str)
1897 char ** str;
1898 {
1899 char * start = * str;
1900 CONST struct asm_psr * psr;
1901
1902 psr = arm_psr_parse (str);
1903
1904 if (psr)
1905 {
1906 /* If this is the SPSR that is being modified, set the R bit. */
1907 if (! psr->cpsr)
1908 inst.instruction |= SPSR_BIT;
1909
1910 /* Set the psr flags in the MSR instruction. */
1911 inst.instruction |= psr->field << PSR_SHIFT;
1912
1913 return SUCCESS;
1914 }
1915
1916 /* In the few cases where we might be able to accept
1917 something else this error can be overridden. */
1918 inst.error = _("flag for {c}psr instruction expected");
1919
1920 /* Restore the start point. */
1921 *str = start;
1922 return FAIL;
1923 }
1924
1925 static int
1926 co_proc_number (str)
1927 char ** str;
1928 {
1929 int processor, pchar;
1930
1931 skip_whitespace (* str);
1932
1933 /* The data sheet seems to imply that just a number on its own is valid
1934 here, but the RISC iX assembler seems to accept a prefix 'p'. We will
1935 accept either. */
1936 if (**str == 'p' || **str == 'P')
1937 (*str)++;
1938
1939 pchar = *(*str)++;
1940 if (pchar >= '0' && pchar <= '9')
1941 {
1942 processor = pchar - '0';
1943 if (**str >= '0' && **str <= '9')
1944 {
1945 processor = processor * 10 + *(*str)++ - '0';
1946 if (processor > 15)
1947 {
1948 inst.error = _("Illegal co-processor number");
1949 return FAIL;
1950 }
1951 }
1952 }
1953 else
1954 {
1955 inst.error = _("Bad or missing co-processor number");
1956 return FAIL;
1957 }
1958
1959 inst.instruction |= processor << 8;
1960 return SUCCESS;
1961 }
1962
1963 static int
1964 cp_opc_expr (str, where, length)
1965 char ** str;
1966 int where;
1967 int length;
1968 {
1969 expressionS expr;
1970
1971 skip_whitespace (* str);
1972
1973 memset (&expr, '\0', sizeof (expr));
1974
1975 if (my_get_expression (&expr, str))
1976 return FAIL;
1977 if (expr.X_op != O_constant)
1978 {
1979 inst.error = _("bad or missing expression");
1980 return FAIL;
1981 }
1982
1983 if ((expr.X_add_number & ((1 << length) - 1)) != expr.X_add_number)
1984 {
1985 inst.error = _("immediate co-processor expression too large");
1986 return FAIL;
1987 }
1988
1989 inst.instruction |= expr.X_add_number << where;
1990 return SUCCESS;
1991 }
1992
1993 static int
1994 cp_reg_required_here (str, where)
1995 char ** str;
1996 int where;
1997 {
1998 int reg;
1999 char * start = *str;
2000
2001 if ((reg = arm_reg_parse (str)) != FAIL && cp_register (reg))
2002 {
2003 reg &= 15;
2004 inst.instruction |= reg << where;
2005 return reg;
2006 }
2007
2008 /* In the few cases where we might be able to accept something else
2009 this error can be overridden. */
2010 inst.error = _("Co-processor register expected");
2011
2012 /* Restore the start point. */
2013 *str = start;
2014 return FAIL;
2015 }
2016
2017 static int
2018 fp_reg_required_here (str, where)
2019 char ** str;
2020 int where;
2021 {
2022 int reg;
2023 char * start = * str;
2024
2025 if ((reg = arm_reg_parse (str)) != FAIL && fp_register (reg))
2026 {
2027 reg &= 7;
2028 inst.instruction |= reg << where;
2029 return reg;
2030 }
2031
2032 /* In the few cases where we might be able to accept something else
2033 this error can be overridden. */
2034 inst.error = _("Floating point register expected");
2035
2036 /* Restore the start point. */
2037 *str = start;
2038 return FAIL;
2039 }
2040
2041 static int
2042 cp_address_offset (str)
2043 char ** str;
2044 {
2045 int offset;
2046
2047 skip_whitespace (* str);
2048
2049 if (! is_immediate_prefix (**str))
2050 {
2051 inst.error = _("immediate expression expected");
2052 return FAIL;
2053 }
2054
2055 (*str)++;
2056
2057 if (my_get_expression (& inst.reloc.exp, str))
2058 return FAIL;
2059
2060 if (inst.reloc.exp.X_op == O_constant)
2061 {
2062 offset = inst.reloc.exp.X_add_number;
2063
2064 if (offset & 3)
2065 {
2066 inst.error = _("co-processor address must be word aligned");
2067 return FAIL;
2068 }
2069
2070 if (offset > 1023 || offset < -1023)
2071 {
2072 inst.error = _("offset too large");
2073 return FAIL;
2074 }
2075
2076 if (offset >= 0)
2077 inst.instruction |= INDEX_UP;
2078 else
2079 offset = -offset;
2080
2081 inst.instruction |= offset >> 2;
2082 }
2083 else
2084 inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM;
2085
2086 return SUCCESS;
2087 }
2088
2089 static int
2090 cp_address_required_here (str)
2091 char ** str;
2092 {
2093 char * p = * str;
2094 int pre_inc = 0;
2095 int write_back = 0;
2096
2097 if (*p == '[')
2098 {
2099 int reg;
2100
2101 p++;
2102 skip_whitespace (p);
2103
2104 if ((reg = reg_required_here (& p, 16)) == FAIL)
2105 return FAIL;
2106
2107 skip_whitespace (p);
2108
2109 if (*p == ']')
2110 {
2111 p++;
2112
2113 if (skip_past_comma (& p) == SUCCESS)
2114 {
2115 /* [Rn], #expr */
2116 write_back = WRITE_BACK;
2117
2118 if (reg == REG_PC)
2119 {
2120 inst.error = _("pc may not be used in post-increment");
2121 return FAIL;
2122 }
2123
2124 if (cp_address_offset (& p) == FAIL)
2125 return FAIL;
2126 }
2127 else
2128 pre_inc = PRE_INDEX | INDEX_UP;
2129 }
2130 else
2131 {
2132 /* '['Rn, #expr']'[!] */
2133
2134 if (skip_past_comma (& p) == FAIL)
2135 {
2136 inst.error = _("pre-indexed expression expected");
2137 return FAIL;
2138 }
2139
2140 pre_inc = PRE_INDEX;
2141
2142 if (cp_address_offset (& p) == FAIL)
2143 return FAIL;
2144
2145 skip_whitespace (p);
2146
2147 if (*p++ != ']')
2148 {
2149 inst.error = _("missing ]");
2150 return FAIL;
2151 }
2152
2153 skip_whitespace (p);
2154
2155 if (*p == '!')
2156 {
2157 if (reg == REG_PC)
2158 {
2159 inst.error = _("pc may not be used with write-back");
2160 return FAIL;
2161 }
2162
2163 p++;
2164 write_back = WRITE_BACK;
2165 }
2166 }
2167 }
2168 else
2169 {
2170 if (my_get_expression (&inst.reloc.exp, &p))
2171 return FAIL;
2172
2173 inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM;
2174 inst.reloc.exp.X_add_number -= 8; /* PC rel adjust. */
2175 inst.reloc.pc_rel = 1;
2176 inst.instruction |= (REG_PC << 16);
2177 pre_inc = PRE_INDEX;
2178 }
2179
2180 inst.instruction |= write_back | pre_inc;
2181 *str = p;
2182 return SUCCESS;
2183 }
2184
2185 static void
2186 do_nop (str, flags)
2187 char * str;
2188 unsigned long flags;
2189 {
2190 /* Do nothing really. */
2191 inst.instruction |= flags; /* This is pointless. */
2192 end_of_line (str);
2193 return;
2194 }
2195
2196 static void
2197 do_mrs (str, flags)
2198 char *str;
2199 unsigned long flags;
2200 {
2201 int skip = 0;
2202
2203 /* Only one syntax. */
2204 skip_whitespace (str);
2205
2206 if (reg_required_here (&str, 12) == FAIL)
2207 {
2208 inst.error = BAD_ARGS;
2209 return;
2210 }
2211
2212 if (skip_past_comma (&str) == FAIL)
2213 {
2214 inst.error = _("comma expected after register name");
2215 return;
2216 }
2217
2218 skip_whitespace (str);
2219
2220 if ( strcmp (str, "CPSR") == 0
2221 || strcmp (str, "SPSR") == 0
2222 /* Lower case versions for backwards compatability. */
2223 || strcmp (str, "cpsr") == 0
2224 || strcmp (str, "spsr") == 0)
2225 skip = 4;
2226
2227 /* This is for backwards compatability with older toolchains. */
2228 else if ( strcmp (str, "cpsr_all") == 0
2229 || strcmp (str, "spsr_all") == 0)
2230 skip = 8;
2231 else
2232 {
2233 inst.error = _("{C|S}PSR expected");
2234 return;
2235 }
2236
2237 if (* str == 's' || * str == 'S')
2238 inst.instruction |= SPSR_BIT;
2239 str += skip;
2240
2241 inst.instruction |= flags;
2242 end_of_line (str);
2243 }
2244
2245 /* Two possible forms:
2246 "{C|S}PSR_<field>, Rm",
2247 "{C|S}PSR_f, #expression". */
2248
2249 static void
2250 do_msr (str, flags)
2251 char * str;
2252 unsigned long flags;
2253 {
2254 skip_whitespace (str);
2255
2256 if (psr_required_here (& str) == FAIL)
2257 return;
2258
2259 if (skip_past_comma (& str) == FAIL)
2260 {
2261 inst.error = _("comma missing after psr flags");
2262 return;
2263 }
2264
2265 skip_whitespace (str);
2266
2267 if (reg_required_here (& str, 0) != FAIL)
2268 {
2269 inst.error = NULL;
2270 inst.instruction |= flags;
2271 end_of_line (str);
2272 return;
2273 }
2274
2275 if (! is_immediate_prefix (* str))
2276 {
2277 inst.error =
2278 _("only a register or immediate value can follow a psr flag");
2279 return;
2280 }
2281
2282 str ++;
2283 inst.error = NULL;
2284
2285 if (my_get_expression (& inst.reloc.exp, & str))
2286 {
2287 inst.error =
2288 _("only a register or immediate value can follow a psr flag");
2289 return;
2290 }
2291
2292 #if 0 /* The first edition of the ARM architecture manual stated that
2293 writing anything other than the flags with an immediate operation
2294 had UNPREDICTABLE effects. This constraint was removed in the
2295 second edition of the specification. */
2296 if ((cpu_variant & ARM_EXT_V5) != ARM_EXT_V5
2297 && inst.instruction & ((PSR_c | PSR_x | PSR_s) << PSR_SHIFT))
2298 {
2299 inst.error = _("immediate value cannot be used to set this field");
2300 return;
2301 }
2302 #endif
2303
2304 flags |= INST_IMMEDIATE;
2305
2306 if (inst.reloc.exp.X_add_symbol)
2307 {
2308 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
2309 inst.reloc.pc_rel = 0;
2310 }
2311 else
2312 {
2313 unsigned value = validate_immediate (inst.reloc.exp.X_add_number);
2314
2315 if (value == (unsigned) FAIL)
2316 {
2317 inst.error = _("Invalid constant");
2318 return;
2319 }
2320
2321 inst.instruction |= value;
2322 }
2323
2324 inst.error = NULL;
2325 inst.instruction |= flags;
2326 end_of_line (str);
2327 }
2328
2329 /* Long Multiply Parser
2330 UMULL RdLo, RdHi, Rm, Rs
2331 SMULL RdLo, RdHi, Rm, Rs
2332 UMLAL RdLo, RdHi, Rm, Rs
2333 SMLAL RdLo, RdHi, Rm, Rs. */
2334
2335 static void
2336 do_mull (str, flags)
2337 char * str;
2338 unsigned long flags;
2339 {
2340 int rdlo, rdhi, rm, rs;
2341
2342 /* Only one format "rdlo, rdhi, rm, rs". */
2343 skip_whitespace (str);
2344
2345 if ((rdlo = reg_required_here (&str, 12)) == FAIL)
2346 {
2347 inst.error = BAD_ARGS;
2348 return;
2349 }
2350
2351 if (skip_past_comma (&str) == FAIL
2352 || (rdhi = reg_required_here (&str, 16)) == FAIL)
2353 {
2354 inst.error = BAD_ARGS;
2355 return;
2356 }
2357
2358 if (skip_past_comma (&str) == FAIL
2359 || (rm = reg_required_here (&str, 0)) == FAIL)
2360 {
2361 inst.error = BAD_ARGS;
2362 return;
2363 }
2364
2365 /* rdhi, rdlo and rm must all be different. */
2366 if (rdlo == rdhi || rdlo == rm || rdhi == rm)
2367 as_tsktsk (_("rdhi, rdlo and rm must all be different"));
2368
2369 if (skip_past_comma (&str) == FAIL
2370 || (rs = reg_required_here (&str, 8)) == FAIL)
2371 {
2372 inst.error = BAD_ARGS;
2373 return;
2374 }
2375
2376 if (rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC)
2377 {
2378 inst.error = BAD_PC;
2379 return;
2380 }
2381
2382 inst.instruction |= flags;
2383 end_of_line (str);
2384 return;
2385 }
2386
2387 static void
2388 do_mul (str, flags)
2389 char * str;
2390 unsigned long flags;
2391 {
2392 int rd, rm;
2393
2394 /* Only one format "rd, rm, rs". */
2395 skip_whitespace (str);
2396
2397 if ((rd = reg_required_here (&str, 16)) == FAIL)
2398 {
2399 inst.error = BAD_ARGS;
2400 return;
2401 }
2402
2403 if (rd == REG_PC)
2404 {
2405 inst.error = BAD_PC;
2406 return;
2407 }
2408
2409 if (skip_past_comma (&str) == FAIL
2410 || (rm = reg_required_here (&str, 0)) == 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 if (rm == rd)
2423 as_tsktsk (_("rd and rm should be different in mul"));
2424
2425 if (skip_past_comma (&str) == FAIL
2426 || (rm = reg_required_here (&str, 8)) == FAIL)
2427 {
2428 inst.error = BAD_ARGS;
2429 return;
2430 }
2431
2432 if (rm == REG_PC)
2433 {
2434 inst.error = BAD_PC;
2435 return;
2436 }
2437
2438 inst.instruction |= flags;
2439 end_of_line (str);
2440 return;
2441 }
2442
2443 static void
2444 do_mla (str, flags)
2445 char * str;
2446 unsigned long flags;
2447 {
2448 int rd, rm;
2449
2450 /* Only one format "rd, rm, rs, rn". */
2451 skip_whitespace (str);
2452
2453 if ((rd = reg_required_here (&str, 16)) == FAIL)
2454 {
2455 inst.error = BAD_ARGS;
2456 return;
2457 }
2458
2459 if (rd == REG_PC)
2460 {
2461 inst.error = BAD_PC;
2462 return;
2463 }
2464
2465 if (skip_past_comma (&str) == FAIL
2466 || (rm = reg_required_here (&str, 0)) == FAIL)
2467 {
2468 inst.error = BAD_ARGS;
2469 return;
2470 }
2471
2472 if (rm == REG_PC)
2473 {
2474 inst.error = BAD_PC;
2475 return;
2476 }
2477
2478 if (rm == rd)
2479 as_tsktsk (_("rd and rm should be different in mla"));
2480
2481 if (skip_past_comma (&str) == FAIL
2482 || (rd = reg_required_here (&str, 8)) == FAIL
2483 || skip_past_comma (&str) == FAIL
2484 || (rm = reg_required_here (&str, 12)) == FAIL)
2485 {
2486 inst.error = BAD_ARGS;
2487 return;
2488 }
2489
2490 if (rd == REG_PC || rm == REG_PC)
2491 {
2492 inst.error = BAD_PC;
2493 return;
2494 }
2495
2496 inst.instruction |= flags;
2497 end_of_line (str);
2498 return;
2499 }
2500
2501 /* Expects *str -> the characters "acc0", possibly with leading blanks.
2502 Advances *str to the next non-alphanumeric.
2503 Returns 0, or else FAIL (in which case sets inst.error).
2504
2505 (In a future XScale, there may be accumulators other than zero.
2506 At that time this routine and its callers can be upgraded to suit.) */
2507
2508 static int
2509 accum0_required_here (str)
2510 char ** str;
2511 {
2512 static char buff [128]; /* Note the address is taken. Hence, static. */
2513 char * p = * str;
2514 char c;
2515 int result = 0; /* The accum number. */
2516
2517 skip_whitespace (p);
2518
2519 *str = p; /* Advance caller's string pointer too. */
2520 c = *p++;
2521 while (isalnum (c))
2522 c = *p++;
2523
2524 *--p = 0; /* Aap nul into input buffer at non-alnum. */
2525
2526 if (! ( streq (*str, "acc0") || streq (*str, "ACC0")))
2527 {
2528 sprintf (buff, _("acc0 expected, not '%.100s'"), *str);
2529 inst.error = buff;
2530 result = FAIL;
2531 }
2532
2533 *p = c; /* Unzap. */
2534 *str = p; /* Caller's string pointer to after match. */
2535 return result;
2536 }
2537
2538 /* Expects **str -> after a comma. May be leading blanks.
2539 Advances *str, recognizing a load mode, and setting inst.instruction.
2540 Returns rn, or else FAIL (in which case may set inst.error
2541 and not advance str)
2542
2543 Note: doesn't know Rd, so no err checks that require such knowledge. */
2544
2545 static int
2546 ld_mode_required_here (string)
2547 char ** string;
2548 {
2549 char * str = * string;
2550 int rn;
2551 int pre_inc = 0;
2552
2553 skip_whitespace (str);
2554
2555 if (* str == '[')
2556 {
2557 str++;
2558
2559 skip_whitespace (str);
2560
2561 if ((rn = reg_required_here (& str, 16)) == FAIL)
2562 return FAIL;
2563
2564 skip_whitespace (str);
2565
2566 if (* str == ']')
2567 {
2568 str ++;
2569
2570 if (skip_past_comma (& str) == SUCCESS)
2571 {
2572 /* [Rn],... (post inc) */
2573 if (ldst_extend (& str, 1) == FAIL)
2574 return FAIL;
2575 }
2576 else /* [Rn] */
2577 {
2578 skip_whitespace (str);
2579
2580 if (* str == '!')
2581 {
2582 str ++;
2583 inst.instruction |= WRITE_BACK;
2584 }
2585
2586 inst.instruction |= INDEX_UP | HWOFFSET_IMM;
2587 pre_inc = 1;
2588 }
2589 }
2590 else /* [Rn,...] */
2591 {
2592 if (skip_past_comma (& str) == FAIL)
2593 {
2594 inst.error = _("pre-indexed expression expected");
2595 return FAIL;
2596 }
2597
2598 pre_inc = 1;
2599
2600 if (ldst_extend (& str, 1) == FAIL)
2601 return FAIL;
2602
2603 skip_whitespace (str);
2604
2605 if (* str ++ != ']')
2606 {
2607 inst.error = _("missing ]");
2608 return FAIL;
2609 }
2610
2611 skip_whitespace (str);
2612
2613 if (* str == '!')
2614 {
2615 str ++;
2616 inst.instruction |= WRITE_BACK;
2617 }
2618 }
2619 }
2620 else if (* str == '=') /* ldr's "r,=label" syntax */
2621 /* We should never reach here, because <text> = <expression> is
2622 caught gas/read.c read_a_source_file() as a .set operation. */
2623 return FAIL;
2624 else /* PC +- 8 bit immediate offset. */
2625 {
2626 if (my_get_expression (& inst.reloc.exp, & str))
2627 return FAIL;
2628
2629 inst.instruction |= HWOFFSET_IMM; /* The I bit. */
2630 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
2631 inst.reloc.exp.X_add_number -= 8; /* PC rel adjust. */
2632 inst.reloc.pc_rel = 1;
2633 inst.instruction |= (REG_PC << 16);
2634
2635 rn = REG_PC;
2636 pre_inc = 1;
2637 }
2638
2639 inst.instruction |= (pre_inc ? PRE_INDEX : 0);
2640 * string = str;
2641
2642 return rn;
2643 }
2644
2645 /* ARM V5E (El Segundo) signed-multiply-accumulate (argument parse)
2646 SMLAxy{cond} Rd,Rm,Rs,Rn
2647 SMLAWy{cond} Rd,Rm,Rs,Rn
2648 Error if any register is R15. */
2649
2650 static void
2651 do_smla (str, flags)
2652 char * str;
2653 unsigned long flags;
2654 {
2655 int rd, rm, rs, rn;
2656
2657 skip_whitespace (str);
2658
2659 if ((rd = reg_required_here (& str, 16)) == FAIL
2660 || skip_past_comma (& str) == FAIL
2661 || (rm = reg_required_here (& str, 0)) == FAIL
2662 || skip_past_comma (& str) == FAIL
2663 || (rs = reg_required_here (& str, 8)) == FAIL
2664 || skip_past_comma (& str) == FAIL
2665 || (rn = reg_required_here (& str, 12)) == FAIL)
2666 inst.error = BAD_ARGS;
2667
2668 else if (rd == REG_PC || rm == REG_PC || rs == REG_PC || rn == REG_PC)
2669 inst.error = BAD_PC;
2670
2671 else if (flags)
2672 inst.error = BAD_FLAGS;
2673
2674 else
2675 end_of_line (str);
2676 }
2677
2678 /* ARM V5E (El Segundo) signed-multiply-accumulate-long (argument parse)
2679 SMLALxy{cond} Rdlo,Rdhi,Rm,Rs
2680 Error if any register is R15.
2681 Warning if Rdlo == Rdhi. */
2682
2683 static void
2684 do_smlal (str, flags)
2685 char * str;
2686 unsigned long flags;
2687 {
2688 int rdlo, rdhi, rm, rs;
2689
2690 skip_whitespace (str);
2691
2692 if ((rdlo = reg_required_here (& str, 12)) == FAIL
2693 || skip_past_comma (& str) == FAIL
2694 || (rdhi = reg_required_here (& str, 16)) == FAIL
2695 || skip_past_comma (& str) == FAIL
2696 || (rm = reg_required_here (& str, 0)) == FAIL
2697 || skip_past_comma (& str) == FAIL
2698 || (rs = reg_required_here (& str, 8)) == FAIL)
2699 {
2700 inst.error = BAD_ARGS;
2701 return;
2702 }
2703
2704 if (rdlo == REG_PC || rdhi == REG_PC || rm == REG_PC || rs == REG_PC)
2705 {
2706 inst.error = BAD_PC;
2707 return;
2708 }
2709
2710 if (rdlo == rdhi)
2711 as_tsktsk (_("rdhi and rdlo must be different"));
2712
2713 if (flags)
2714 inst.error = BAD_FLAGS;
2715 else
2716 end_of_line (str);
2717 }
2718
2719 /* ARM V5E (El Segundo) signed-multiply (argument parse)
2720 SMULxy{cond} Rd,Rm,Rs
2721 Error if any register is R15. */
2722
2723 static void
2724 do_smul (str, flags)
2725 char * str;
2726 unsigned long flags;
2727 {
2728 int rd, rm, rs;
2729
2730 skip_whitespace (str);
2731
2732 if ((rd = reg_required_here (& str, 16)) == FAIL
2733 || skip_past_comma (& str) == FAIL
2734 || (rm = reg_required_here (& str, 0)) == FAIL
2735 || skip_past_comma (& str) == FAIL
2736 || (rs = reg_required_here (& str, 8)) == FAIL)
2737 inst.error = BAD_ARGS;
2738
2739 else if (rd == REG_PC || rm == REG_PC || rs == REG_PC)
2740 inst.error = BAD_PC;
2741
2742 else if (flags)
2743 inst.error = BAD_FLAGS;
2744
2745 else
2746 end_of_line (str);
2747 }
2748
2749 /* ARM V5E (El Segundo) saturating-add/subtract (argument parse)
2750 Q[D]{ADD,SUB}{cond} Rd,Rm,Rn
2751 Error if any register is R15. */
2752
2753 static void
2754 do_qadd (str, flags)
2755 char * str;
2756 unsigned long flags;
2757 {
2758 int rd, rm, rn;
2759
2760 skip_whitespace (str);
2761
2762 if ((rd = reg_required_here (& str, 12)) == FAIL
2763 || skip_past_comma (& str) == FAIL
2764 || (rm = reg_required_here (& str, 0)) == FAIL
2765 || skip_past_comma (& str) == FAIL
2766 || (rn = reg_required_here (& str, 16)) == FAIL)
2767 inst.error = BAD_ARGS;
2768
2769 else if (rd == REG_PC || rm == REG_PC || rn == REG_PC)
2770 inst.error = BAD_PC;
2771
2772 else if (flags)
2773 inst.error = BAD_FLAGS;
2774
2775 else
2776 end_of_line (str);
2777 }
2778
2779 /* ARM V5E (el Segundo)
2780 MCRRcc <coproc>, <opcode>, <Rd>, <Rn>, <CRm>.
2781 MRRCcc <coproc>, <opcode>, <Rd>, <Rn>, <CRm>.
2782
2783 These are equivalent to the XScale instructions MAR and MRA,
2784 respectively, when coproc == 0, opcode == 0, and CRm == 0.
2785
2786 Result unpredicatable if Rd or Rn is R15. */
2787
2788 static void
2789 do_co_reg2c (str, flags)
2790 char * str;
2791 unsigned long flags;
2792 {
2793 int rd, rn;
2794
2795 skip_whitespace (str);
2796
2797 if (co_proc_number (& str) == FAIL)
2798 {
2799 if (!inst.error)
2800 inst.error = BAD_ARGS;
2801 return;
2802 }
2803
2804 if (skip_past_comma (& str) == FAIL
2805 || cp_opc_expr (& str, 4, 4) == FAIL)
2806 {
2807 if (!inst.error)
2808 inst.error = BAD_ARGS;
2809 return;
2810 }
2811
2812 if (skip_past_comma (& str) == FAIL
2813 || (rd = reg_required_here (& str, 12)) == FAIL)
2814 {
2815 if (!inst.error)
2816 inst.error = BAD_ARGS;
2817 return;
2818 }
2819
2820 if (skip_past_comma (& str) == FAIL
2821 || (rn = reg_required_here (& str, 16)) == FAIL)
2822 {
2823 if (!inst.error)
2824 inst.error = BAD_ARGS;
2825 return;
2826 }
2827
2828 /* Unpredictable result if rd or rn is R15. */
2829 if (rd == REG_PC || rn == REG_PC)
2830 as_tsktsk
2831 (_("Warning: Instruction unpredictable when using r15"));
2832
2833 if (skip_past_comma (& str) == FAIL
2834 || cp_reg_required_here (& str, 0) == FAIL)
2835 {
2836 if (!inst.error)
2837 inst.error = BAD_ARGS;
2838 return;
2839 }
2840
2841 if (flags)
2842 inst.error = BAD_COND;
2843
2844 end_of_line (str);
2845 }
2846
2847 /* ARM V5 count-leading-zeroes instruction (argument parse)
2848 CLZ{<cond>} <Rd>, <Rm>
2849 Condition defaults to COND_ALWAYS.
2850 Error if Rd or Rm are R15. */
2851
2852 static void
2853 do_clz (str, flags)
2854 char * str;
2855 unsigned long flags;
2856 {
2857 int rd, rm;
2858
2859 if (flags)
2860 {
2861 as_bad (BAD_FLAGS);
2862 return;
2863 }
2864
2865 skip_whitespace (str);
2866
2867 if (((rd = reg_required_here (& str, 12)) == FAIL)
2868 || (skip_past_comma (& str) == FAIL)
2869 || ((rm = reg_required_here (& str, 0)) == FAIL))
2870 inst.error = BAD_ARGS;
2871
2872 else if (rd == REG_PC || rm == REG_PC )
2873 inst.error = BAD_PC;
2874
2875 else
2876 end_of_line (str);
2877 }
2878
2879 /* ARM V5 (argument parse)
2880 LDC2{L} <coproc>, <CRd>, <addressing mode>
2881 STC2{L} <coproc>, <CRd>, <addressing mode>
2882 Instruction is not conditional, and has 0xf in the codition field.
2883 Otherwise, it's the same as LDC/STC. */
2884
2885 static void
2886 do_lstc2 (str, flags)
2887 char * str;
2888 unsigned long flags;
2889 {
2890 if (flags)
2891 inst.error = BAD_COND;
2892
2893 skip_whitespace (str);
2894
2895 if (co_proc_number (& str) == FAIL)
2896 {
2897 if (!inst.error)
2898 inst.error = BAD_ARGS;
2899 }
2900 else if (skip_past_comma (& str) == FAIL
2901 || cp_reg_required_here (& str, 12) == FAIL)
2902 {
2903 if (!inst.error)
2904 inst.error = BAD_ARGS;
2905 }
2906 else if (skip_past_comma (& str) == FAIL
2907 || cp_address_required_here (& str) == FAIL)
2908 {
2909 if (! inst.error)
2910 inst.error = BAD_ARGS;
2911 }
2912 else
2913 end_of_line (str);
2914 }
2915
2916 /* ARM V5 (argument parse)
2917 CDP2 <coproc>, <opcode_1>, <CRd>, <CRn>, <CRm>, <opcode_2>
2918 Instruction is not conditional, and has 0xf in the condition field.
2919 Otherwise, it's the same as CDP. */
2920
2921 static void
2922 do_cdp2 (str, flags)
2923 char * str;
2924 unsigned long flags;
2925 {
2926 skip_whitespace (str);
2927
2928 if (co_proc_number (& str) == FAIL)
2929 {
2930 if (!inst.error)
2931 inst.error = BAD_ARGS;
2932 return;
2933 }
2934
2935 if (skip_past_comma (& str) == FAIL
2936 || cp_opc_expr (& str, 20,4) == 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, 12) == FAIL)
2945 {
2946 if (!inst.error)
2947 inst.error = BAD_ARGS;
2948 return;
2949 }
2950
2951 if (skip_past_comma (& str) == FAIL
2952 || cp_reg_required_here (& str, 16) == FAIL)
2953 {
2954 if (!inst.error)
2955 inst.error = BAD_ARGS;
2956 return;
2957 }
2958
2959 if (skip_past_comma (& str) == FAIL
2960 || cp_reg_required_here (& str, 0) == FAIL)
2961 {
2962 if (!inst.error)
2963 inst.error = BAD_ARGS;
2964 return;
2965 }
2966
2967 if (skip_past_comma (& str) == SUCCESS)
2968 {
2969 if (cp_opc_expr (& str, 5, 3) == FAIL)
2970 {
2971 if (!inst.error)
2972 inst.error = BAD_ARGS;
2973 return;
2974 }
2975 }
2976
2977 if (flags)
2978 inst.error = BAD_FLAGS;
2979
2980 end_of_line (str);
2981 }
2982
2983 /* ARM V5 (argument parse)
2984 MCR2 <coproc>, <opcode_1>, <Rd>, <CRn>, <CRm>, <opcode_2>
2985 MRC2 <coproc>, <opcode_1>, <Rd>, <CRn>, <CRm>, <opcode_2>
2986 Instruction is not conditional, and has 0xf in the condition field.
2987 Otherwise, it's the same as MCR/MRC. */
2988
2989 static void
2990 do_co_reg2 (str, flags)
2991 char * str;
2992 unsigned long flags;
2993 {
2994 skip_whitespace (str);
2995
2996 if (co_proc_number (& str) == FAIL)
2997 {
2998 if (!inst.error)
2999 inst.error = BAD_ARGS;
3000 return;
3001 }
3002
3003 if (skip_past_comma (& str) == FAIL
3004 || cp_opc_expr (& str, 21, 3) == FAIL)
3005 {
3006 if (!inst.error)
3007 inst.error = BAD_ARGS;
3008 return;
3009 }
3010
3011 if (skip_past_comma (& str) == FAIL
3012 || reg_required_here (& str, 12) == FAIL)
3013 {
3014 if (!inst.error)
3015 inst.error = BAD_ARGS;
3016 return;
3017 }
3018
3019 if (skip_past_comma (& str) == FAIL
3020 || cp_reg_required_here (& str, 16) == FAIL)
3021 {
3022 if (!inst.error)
3023 inst.error = BAD_ARGS;
3024 return;
3025 }
3026
3027 if (skip_past_comma (& str) == FAIL
3028 || cp_reg_required_here (& str, 0) == FAIL)
3029 {
3030 if (!inst.error)
3031 inst.error = BAD_ARGS;
3032 return;
3033 }
3034
3035 if (skip_past_comma (& str) == SUCCESS)
3036 {
3037 if (cp_opc_expr (& str, 5, 3) == FAIL)
3038 {
3039 if (!inst.error)
3040 inst.error = BAD_ARGS;
3041 return;
3042 }
3043 }
3044
3045 if (flags)
3046 inst.error = BAD_COND;
3047
3048 end_of_line (str);
3049 }
3050
3051 /* THUMB V5 breakpoint instruction (argument parse)
3052 BKPT <immed_8>. */
3053
3054 static void
3055 do_t_bkpt (str)
3056 char * str;
3057 {
3058 expressionS expr;
3059 unsigned long number;
3060
3061 skip_whitespace (str);
3062
3063 /* Allow optional leading '#'. */
3064 if (is_immediate_prefix (*str))
3065 str ++;
3066
3067 memset (& expr, '\0', sizeof (expr));
3068 if (my_get_expression (& expr, & str) || (expr.X_op != O_constant))
3069 {
3070 inst.error = _("bad or missing expression");
3071 return;
3072 }
3073
3074 number = expr.X_add_number;
3075
3076 /* Check it fits an 8 bit unsigned. */
3077 if (number != (number & 0xff))
3078 {
3079 inst.error = _("immediate value out of range");
3080 return;
3081 }
3082
3083 inst.instruction |= number;
3084
3085 end_of_line (str);
3086 }
3087
3088 /* ARM V5 branch-link-exchange (argument parse) for BLX(1) only.
3089 Expects inst.instruction is set for BLX(1).
3090 Note: this is cloned from do_branch, and the reloc changed to be a
3091 new one that can cope with setting one extra bit (the H bit). */
3092
3093 static void
3094 do_branch25 (str, flags)
3095 char * str;
3096 unsigned long flags ATTRIBUTE_UNUSED;
3097 {
3098 if (my_get_expression (& inst.reloc.exp, & str))
3099 return;
3100
3101 #ifdef OBJ_ELF
3102 {
3103 char * save_in;
3104
3105 /* ScottB: February 5, 1998 */
3106 /* Check to see of PLT32 reloc required for the instruction. */
3107
3108 /* arm_parse_reloc() works on input_line_pointer.
3109 We actually want to parse the operands to the branch instruction
3110 passed in 'str'. Save the input pointer and restore it later. */
3111 save_in = input_line_pointer;
3112 input_line_pointer = str;
3113
3114 if (inst.reloc.exp.X_op == O_symbol
3115 && *str == '('
3116 && arm_parse_reloc () == BFD_RELOC_ARM_PLT32)
3117 {
3118 inst.reloc.type = BFD_RELOC_ARM_PLT32;
3119 inst.reloc.pc_rel = 0;
3120 /* Modify str to point to after parsed operands, otherwise
3121 end_of_line() will complain about the (PLT) left in str. */
3122 str = input_line_pointer;
3123 }
3124 else
3125 {
3126 inst.reloc.type = BFD_RELOC_ARM_PCREL_BLX;
3127 inst.reloc.pc_rel = 1;
3128 }
3129
3130 input_line_pointer = save_in;
3131 }
3132 #else
3133 inst.reloc.type = BFD_RELOC_ARM_PCREL_BLX;
3134 inst.reloc.pc_rel = 1;
3135 #endif /* OBJ_ELF */
3136
3137 end_of_line (str);
3138 }
3139
3140 /* ARM V5 branch-link-exchange instruction (argument parse)
3141 BLX <target_addr> ie BLX(1)
3142 BLX{<condition>} <Rm> ie BLX(2)
3143 Unfortunately, there are two different opcodes for this mnemonic.
3144 So, the insns[].value is not used, and the code here zaps values
3145 into inst.instruction.
3146 Also, the <target_addr> can be 25 bits, hence has its own reloc. */
3147
3148 static void
3149 do_blx (str, flags)
3150 char * str;
3151 unsigned long flags;
3152 {
3153 char * mystr = str;
3154 int rm;
3155
3156 if (flags)
3157 {
3158 as_bad (BAD_FLAGS);
3159 return;
3160 }
3161
3162 skip_whitespace (mystr);
3163 rm = reg_required_here (& mystr, 0);
3164
3165 /* The above may set inst.error. Ignore his opinion. */
3166 inst.error = 0;
3167
3168 if (rm != FAIL)
3169 {
3170 /* Arg is a register.
3171 Use the condition code our caller put in inst.instruction.
3172 Pass ourselves off as a BX with a funny opcode. */
3173 inst.instruction |= 0x012fff30;
3174 do_bx (str, flags);
3175 }
3176 else
3177 {
3178 /* This must be is BLX <target address>, no condition allowed. */
3179 if (inst.instruction != COND_ALWAYS)
3180 {
3181 inst.error = BAD_COND;
3182 return;
3183 }
3184
3185 inst.instruction = 0xfafffffe;
3186
3187 /* Process like a B/BL, but with a different reloc.
3188 Note that B/BL expecte fffffe, not 0, offset in the opcode table. */
3189 do_branch25 (str, flags);
3190 }
3191 }
3192
3193 /* ARM V5 Thumb BLX (argument parse)
3194 BLX <target_addr> which is BLX(1)
3195 BLX <Rm> which is BLX(2)
3196 Unfortunately, there are two different opcodes for this mnemonic.
3197 So, the tinsns[].value is not used, and the code here zaps values
3198 into inst.instruction. */
3199
3200 static void
3201 do_t_blx (str)
3202 char * str;
3203 {
3204 char * mystr = str;
3205 int rm;
3206
3207 skip_whitespace (mystr);
3208 inst.instruction = 0x4780;
3209
3210 /* Note that this call is to the ARM register recognizer. BLX(2)
3211 uses the ARM register space, not the Thumb one, so a call to
3212 thumb_reg() would be wrong. */
3213 rm = reg_required_here (& mystr, 3);
3214 inst.error = 0;
3215
3216 if (rm != FAIL)
3217 {
3218 /* It's BLX(2). The .instruction was zapped with rm & is final. */
3219 inst.size = 2;
3220 }
3221 else
3222 {
3223 /* No ARM register. This must be BLX(1). Change the .instruction. */
3224 inst.instruction = 0xf7ffeffe;
3225 inst.size = 4;
3226
3227 if (my_get_expression (& inst.reloc.exp, & mystr))
3228 return;
3229
3230 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BLX;
3231 inst.reloc.pc_rel = 1;
3232 }
3233
3234 end_of_line (mystr);
3235 }
3236
3237 /* ARM V5 breakpoint instruction (argument parse)
3238 BKPT <16 bit unsigned immediate>
3239 Instruction is not conditional.
3240 The bit pattern given in insns[] has the COND_ALWAYS condition,
3241 and it is an error if the caller tried to override that.
3242 Note "flags" is nonzero if a flag was supplied (which is an error). */
3243
3244 static void
3245 do_bkpt (str, flags)
3246 char * str;
3247 unsigned long flags;
3248 {
3249 expressionS expr;
3250 unsigned long number;
3251
3252 skip_whitespace (str);
3253
3254 /* Allow optional leading '#'. */
3255 if (is_immediate_prefix (* str))
3256 str++;
3257
3258 memset (& expr, '\0', sizeof (expr));
3259
3260 if (my_get_expression (& expr, & str) || (expr.X_op != O_constant))
3261 {
3262 inst.error = _("bad or missing expression");
3263 return;
3264 }
3265
3266 number = expr.X_add_number;
3267
3268 /* Check it fits a 16 bit unsigned. */
3269 if (number != (number & 0xffff))
3270 {
3271 inst.error = _("immediate value out of range");
3272 return;
3273 }
3274
3275 /* Top 12 of 16 bits to bits 19:8. */
3276 inst.instruction |= (number & 0xfff0) << 4;
3277
3278 /* Bottom 4 of 16 bits to bits 3:0. */
3279 inst.instruction |= number & 0xf;
3280
3281 end_of_line (str);
3282
3283 if (flags)
3284 inst.error = BAD_FLAGS;
3285 }
3286
3287 /* Xscale multiply-accumulate (argument parse)
3288 MIAcc acc0,Rm,Rs
3289 MIAPHcc acc0,Rm,Rs
3290 MIAxycc acc0,Rm,Rs. */
3291
3292 static void
3293 do_mia (str, flags)
3294 char * str;
3295 unsigned long flags;
3296 {
3297 int rs;
3298 int rm;
3299
3300 if (flags)
3301 as_bad (BAD_FLAGS);
3302
3303 else if (accum0_required_here (& str) == FAIL)
3304 inst.error = ERR_NO_ACCUM;
3305
3306 else if (skip_past_comma (& str) == FAIL
3307 || (rm = reg_required_here (& str, 0)) == FAIL)
3308 inst.error = BAD_ARGS;
3309
3310 else if (skip_past_comma (& str) == FAIL
3311 || (rs = reg_required_here (& str, 12)) == FAIL)
3312 inst.error = BAD_ARGS;
3313
3314 /* inst.instruction has now been zapped with both rm and rs. */
3315 else if (rm == REG_PC || rs == REG_PC)
3316 inst.error = BAD_PC; /* Undefined result if rm or rs is R15. */
3317
3318 else
3319 end_of_line (str);
3320 }
3321
3322 /* Xscale move-accumulator-register (argument parse)
3323
3324 MARcc acc0,RdLo,RdHi. */
3325
3326 static void
3327 do_mar (str, flags)
3328 char * str;
3329 unsigned long flags;
3330 {
3331 int rdlo, rdhi;
3332
3333 if (flags)
3334 as_bad (BAD_FLAGS);
3335
3336 else if (accum0_required_here (& str) == FAIL)
3337 inst.error = ERR_NO_ACCUM;
3338
3339 else if (skip_past_comma (& str) == FAIL
3340 || (rdlo = reg_required_here (& str, 12)) == FAIL)
3341 inst.error = BAD_ARGS;
3342
3343 else if (skip_past_comma (& str) == FAIL
3344 || (rdhi = reg_required_here (& str, 16)) == FAIL)
3345 inst.error = BAD_ARGS;
3346
3347 /* inst.instruction has now been zapped with both rdlo and rdhi. */
3348 else if (rdlo == REG_PC || rdhi == REG_PC)
3349 inst.error = BAD_PC; /* Undefined result if rdlo or rdhi is R15. */
3350
3351 else
3352 end_of_line (str);
3353 }
3354
3355 /* Xscale move-register-accumulator (argument parse)
3356
3357 MRAcc RdLo,RdHi,acc0. */
3358
3359 static void
3360 do_mra (str, flags)
3361 char * str;
3362 unsigned long flags;
3363 {
3364 int rdlo;
3365 int rdhi;
3366
3367 if (flags)
3368 {
3369 as_bad (BAD_FLAGS);
3370 return;
3371 }
3372
3373 skip_whitespace (str);
3374
3375 if ((rdlo = reg_required_here (& str, 12)) == FAIL)
3376 inst.error = BAD_ARGS;
3377
3378 else if (skip_past_comma (& str) == FAIL
3379 || (rdhi = reg_required_here (& str, 16)) == FAIL)
3380 inst.error = BAD_ARGS;
3381
3382 else if (skip_past_comma (& str) == FAIL
3383 || accum0_required_here (& str) == FAIL)
3384 inst.error = ERR_NO_ACCUM;
3385
3386 /* inst.instruction has now been zapped with both rdlo and rdhi. */
3387 else if (rdlo == rdhi)
3388 inst.error = BAD_ARGS; /* Undefined result if 2 writes to same reg. */
3389
3390 else if (rdlo == REG_PC || rdhi == REG_PC)
3391 inst.error = BAD_PC; /* Undefined result if rdlo or rdhi is R15. */
3392 else
3393 end_of_line (str);
3394 }
3395
3396 /* Xscale: Preload-Cache
3397
3398 PLD <addr_mode>
3399
3400 Syntactically, like LDR with B=1, W=0, L=1. */
3401
3402 static void
3403 do_pld (str, flags)
3404 char * str;
3405 unsigned long flags;
3406 {
3407 int rd;
3408
3409 if (flags)
3410 {
3411 as_bad (BAD_FLAGS);
3412 return;
3413 }
3414
3415 skip_whitespace (str);
3416
3417 if (* str != '[')
3418 {
3419 inst.error = _("'[' expected after PLD mnemonic");
3420 return;
3421 }
3422
3423 ++ str;
3424 skip_whitespace (str);
3425
3426 if ((rd = reg_required_here (& str, 16)) == FAIL)
3427 return;
3428
3429 skip_whitespace (str);
3430
3431 if (* str == ']')
3432 {
3433 /* [Rn], ... ? */
3434 ++ str;
3435 skip_whitespace (str);
3436
3437 if (skip_past_comma (& str) == SUCCESS)
3438 {
3439 if (ldst_extend (& str, 0) == FAIL)
3440 return;
3441 }
3442 else if (* str == '!') /* [Rn]! */
3443 {
3444 inst.error = _("writeback used in preload instruction");
3445 ++ str;
3446 }
3447 else /* [Rn] */
3448 inst.instruction |= INDEX_UP | PRE_INDEX;
3449 }
3450 else /* [Rn, ...] */
3451 {
3452 if (skip_past_comma (& str) == FAIL)
3453 {
3454 inst.error = _("pre-indexed expression expected");
3455 return;
3456 }
3457
3458 if (ldst_extend (& str, 0) == FAIL)
3459 return;
3460
3461 skip_whitespace (str);
3462
3463 if (* str != ']')
3464 {
3465 inst.error = _("missing ]");
3466 return;
3467 }
3468
3469 ++ str;
3470 skip_whitespace (str);
3471
3472 if (* str == '!') /* [Rn]! */
3473 {
3474 inst.error = _("writeback used in preload instruction");
3475 ++ str;
3476 }
3477
3478 inst.instruction |= PRE_INDEX;
3479 }
3480
3481 end_of_line (str);
3482 }
3483
3484 /* Xscale load-consecutive (argument parse)
3485 Mode is like LDRH.
3486
3487 LDRccD R, mode
3488 STRccD R, mode. */
3489
3490 static void
3491 do_ldrd (str, flags)
3492 char * str;
3493 unsigned long flags;
3494 {
3495 int rd;
3496 int rn;
3497
3498 if (flags != DOUBLE_LOAD_FLAG)
3499 {
3500 /* Change instruction pattern to normal ldr/str. */
3501 if (inst.instruction & 0x20)
3502 inst.instruction = (inst.instruction & COND_MASK) | 0x04000000; /* str */
3503 else
3504 inst.instruction = (inst.instruction & COND_MASK) | 0x04100000; /* ldr */
3505
3506 /* Perform a normal load/store instruction parse. */
3507 do_ldst (str, flags);
3508
3509 return;
3510 }
3511
3512 if ((cpu_variant & ARM_EXT_XSCALE) != ARM_EXT_XSCALE)
3513 {
3514 static char buff[128];
3515
3516 --str;
3517 while (isspace (*str))
3518 --str;
3519 str -= 4;
3520
3521 /* Deny all knowledge. */
3522 sprintf (buff, _("bad instruction '%.100s'"), str);
3523 inst.error = buff;
3524 return;
3525 }
3526
3527 skip_whitespace (str);
3528
3529 if ((rd = reg_required_here (& str, 12)) == FAIL)
3530 {
3531 inst.error = BAD_ARGS;
3532 return;
3533 }
3534
3535 if (skip_past_comma (& str) == FAIL
3536 || (rn = ld_mode_required_here (& str)) == FAIL)
3537 {
3538 if (!inst.error)
3539 inst.error = BAD_ARGS;
3540 return;
3541 }
3542
3543 /* inst.instruction has now been zapped with Rd and the addressing mode. */
3544 if (rd & 1) /* Unpredictable result if Rd is odd. */
3545 {
3546 inst.error = _("Destination register must be even");
3547 return;
3548 }
3549
3550 if (rd == REG_LR || rd == 12)
3551 {
3552 inst.error = _("r12 or r14 not allowed here");
3553 return;
3554 }
3555
3556 if (((rd == rn) || (rd + 1 == rn))
3557 &&
3558 ((inst.instruction & WRITE_BACK)
3559 || (!(inst.instruction & PRE_INDEX))))
3560 as_warn (_("pre/post-indexing used when modified address register is destination"));
3561
3562 end_of_line (str);
3563 }
3564
3565 /* Returns the index into fp_values of a floating point number,
3566 or -1 if not in the table. */
3567
3568 static int
3569 my_get_float_expression (str)
3570 char ** str;
3571 {
3572 LITTLENUM_TYPE words[MAX_LITTLENUMS];
3573 char * save_in;
3574 expressionS exp;
3575 int i;
3576 int j;
3577
3578 memset (words, 0, MAX_LITTLENUMS * sizeof (LITTLENUM_TYPE));
3579
3580 /* Look for a raw floating point number. */
3581 if ((save_in = atof_ieee (*str, 'x', words)) != NULL
3582 && is_end_of_line[(unsigned char) *save_in])
3583 {
3584 for (i = 0; i < NUM_FLOAT_VALS; i++)
3585 {
3586 for (j = 0; j < MAX_LITTLENUMS; j++)
3587 {
3588 if (words[j] != fp_values[i][j])
3589 break;
3590 }
3591
3592 if (j == MAX_LITTLENUMS)
3593 {
3594 *str = save_in;
3595 return i;
3596 }
3597 }
3598 }
3599
3600 /* Try and parse a more complex expression, this will probably fail
3601 unless the code uses a floating point prefix (eg "0f"). */
3602 save_in = input_line_pointer;
3603 input_line_pointer = *str;
3604 if (expression (&exp) == absolute_section
3605 && exp.X_op == O_big
3606 && exp.X_add_number < 0)
3607 {
3608 /* FIXME: 5 = X_PRECISION, should be #define'd where we can use it.
3609 Ditto for 15. */
3610 if (gen_to_words (words, 5, (long) 15) == 0)
3611 {
3612 for (i = 0; i < NUM_FLOAT_VALS; i++)
3613 {
3614 for (j = 0; j < MAX_LITTLENUMS; j++)
3615 {
3616 if (words[j] != fp_values[i][j])
3617 break;
3618 }
3619
3620 if (j == MAX_LITTLENUMS)
3621 {
3622 *str = input_line_pointer;
3623 input_line_pointer = save_in;
3624 return i;
3625 }
3626 }
3627 }
3628 }
3629
3630 *str = input_line_pointer;
3631 input_line_pointer = save_in;
3632 return -1;
3633 }
3634
3635 /* Return true if anything in the expression is a bignum. */
3636
3637 static int
3638 walk_no_bignums (sp)
3639 symbolS * sp;
3640 {
3641 if (symbol_get_value_expression (sp)->X_op == O_big)
3642 return 1;
3643
3644 if (symbol_get_value_expression (sp)->X_add_symbol)
3645 {
3646 return (walk_no_bignums (symbol_get_value_expression (sp)->X_add_symbol)
3647 || (symbol_get_value_expression (sp)->X_op_symbol
3648 && walk_no_bignums (symbol_get_value_expression (sp)->X_op_symbol)));
3649 }
3650
3651 return 0;
3652 }
3653
3654 static int
3655 my_get_expression (ep, str)
3656 expressionS * ep;
3657 char ** str;
3658 {
3659 char * save_in;
3660 segT seg;
3661
3662 save_in = input_line_pointer;
3663 input_line_pointer = *str;
3664 seg = expression (ep);
3665
3666 #ifdef OBJ_AOUT
3667 if (seg != absolute_section
3668 && seg != text_section
3669 && seg != data_section
3670 && seg != bss_section
3671 && seg != undefined_section)
3672 {
3673 inst.error = _("bad_segment");
3674 *str = input_line_pointer;
3675 input_line_pointer = save_in;
3676 return 1;
3677 }
3678 #endif
3679
3680 /* Get rid of any bignums now, so that we don't generate an error for which
3681 we can't establish a line number later on. Big numbers are never valid
3682 in instructions, which is where this routine is always called. */
3683 if (ep->X_op == O_big
3684 || (ep->X_add_symbol
3685 && (walk_no_bignums (ep->X_add_symbol)
3686 || (ep->X_op_symbol
3687 && walk_no_bignums (ep->X_op_symbol)))))
3688 {
3689 inst.error = _("Invalid constant");
3690 *str = input_line_pointer;
3691 input_line_pointer = save_in;
3692 return 1;
3693 }
3694
3695 *str = input_line_pointer;
3696 input_line_pointer = save_in;
3697 return 0;
3698 }
3699
3700 /* UNRESTRICT should be one if <shift> <register> is permitted for this
3701 instruction. */
3702
3703 static int
3704 decode_shift (str, unrestrict)
3705 char ** str;
3706 int unrestrict;
3707 {
3708 const struct asm_shift_name * shift;
3709 char * p;
3710 char c;
3711
3712 skip_whitespace (* str);
3713
3714 for (p = * str; isalpha (* p); p ++)
3715 ;
3716
3717 if (p == * str)
3718 {
3719 inst.error = _("Shift expression expected");
3720 return FAIL;
3721 }
3722
3723 c = * p;
3724 * p = '\0';
3725 shift = (const struct asm_shift_name *) hash_find (arm_shift_hsh, * str);
3726 * p = c;
3727
3728 if (shift == NULL)
3729 {
3730 inst.error = _("Shift expression expected");
3731 return FAIL;
3732 }
3733
3734 assert (shift->properties->index == shift_properties[shift->properties->index].index);
3735
3736 if (shift->properties->index == SHIFT_RRX)
3737 {
3738 * str = p;
3739 inst.instruction |= shift->properties->bit_field;
3740 return SUCCESS;
3741 }
3742
3743 skip_whitespace (p);
3744
3745 if (unrestrict && reg_required_here (& p, 8) != FAIL)
3746 {
3747 inst.instruction |= shift->properties->bit_field | SHIFT_BY_REG;
3748 * str = p;
3749 return SUCCESS;
3750 }
3751 else if (! is_immediate_prefix (* p))
3752 {
3753 inst.error = (unrestrict
3754 ? _("shift requires register or #expression")
3755 : _("shift requires #expression"));
3756 * str = p;
3757 return FAIL;
3758 }
3759
3760 inst.error = NULL;
3761 p ++;
3762
3763 if (my_get_expression (& inst.reloc.exp, & p))
3764 return FAIL;
3765
3766 /* Validate some simple #expressions. */
3767 if (inst.reloc.exp.X_op == O_constant)
3768 {
3769 unsigned num = inst.reloc.exp.X_add_number;
3770
3771 /* Reject operations greater than 32. */
3772 if (num > 32
3773 /* Reject a shift of 0 unless the mode allows it. */
3774 || (num == 0 && shift->properties->allows_0 == 0)
3775 /* Reject a shift of 32 unless the mode allows it. */
3776 || (num == 32 && shift->properties->allows_32 == 0)
3777 )
3778 {
3779 /* As a special case we allow a shift of zero for
3780 modes that do not support it to be recoded as an
3781 logical shift left of zero (ie nothing). We warn
3782 about this though. */
3783 if (num == 0)
3784 {
3785 as_warn (_("Shift of 0 ignored."));
3786 shift = & shift_names[0];
3787 assert (shift->properties->index == SHIFT_LSL);
3788 }
3789 else
3790 {
3791 inst.error = _("Invalid immediate shift");
3792 return FAIL;
3793 }
3794 }
3795
3796 /* Shifts of 32 are encoded as 0, for those shifts that
3797 support it. */
3798 if (num == 32)
3799 num = 0;
3800
3801 inst.instruction |= (num << 7) | shift->properties->bit_field;
3802 }
3803 else
3804 {
3805 inst.reloc.type = BFD_RELOC_ARM_SHIFT_IMM;
3806 inst.reloc.pc_rel = 0;
3807 inst.instruction |= shift->properties->bit_field;
3808 }
3809
3810 * str = p;
3811 return SUCCESS;
3812 }
3813
3814 /* Do those data_ops which can take a negative immediate constant
3815 by altering the instuction. A bit of a hack really.
3816 MOV <-> MVN
3817 AND <-> BIC
3818 ADC <-> SBC
3819 by inverting the second operand, and
3820 ADD <-> SUB
3821 CMP <-> CMN
3822 by negating the second operand. */
3823
3824 static int
3825 negate_data_op (instruction, value)
3826 unsigned long * instruction;
3827 unsigned long value;
3828 {
3829 int op, new_inst;
3830 unsigned long negated, inverted;
3831
3832 negated = validate_immediate (-value);
3833 inverted = validate_immediate (~value);
3834
3835 op = (*instruction >> DATA_OP_SHIFT) & 0xf;
3836 switch (op)
3837 {
3838 /* First negates. */
3839 case OPCODE_SUB: /* ADD <-> SUB */
3840 new_inst = OPCODE_ADD;
3841 value = negated;
3842 break;
3843
3844 case OPCODE_ADD:
3845 new_inst = OPCODE_SUB;
3846 value = negated;
3847 break;
3848
3849 case OPCODE_CMP: /* CMP <-> CMN */
3850 new_inst = OPCODE_CMN;
3851 value = negated;
3852 break;
3853
3854 case OPCODE_CMN:
3855 new_inst = OPCODE_CMP;
3856 value = negated;
3857 break;
3858
3859 /* Now Inverted ops. */
3860 case OPCODE_MOV: /* MOV <-> MVN */
3861 new_inst = OPCODE_MVN;
3862 value = inverted;
3863 break;
3864
3865 case OPCODE_MVN:
3866 new_inst = OPCODE_MOV;
3867 value = inverted;
3868 break;
3869
3870 case OPCODE_AND: /* AND <-> BIC */
3871 new_inst = OPCODE_BIC;
3872 value = inverted;
3873 break;
3874
3875 case OPCODE_BIC:
3876 new_inst = OPCODE_AND;
3877 value = inverted;
3878 break;
3879
3880 case OPCODE_ADC: /* ADC <-> SBC */
3881 new_inst = OPCODE_SBC;
3882 value = inverted;
3883 break;
3884
3885 case OPCODE_SBC:
3886 new_inst = OPCODE_ADC;
3887 value = inverted;
3888 break;
3889
3890 /* We cannot do anything. */
3891 default:
3892 return FAIL;
3893 }
3894
3895 if (value == (unsigned) FAIL)
3896 return FAIL;
3897
3898 *instruction &= OPCODE_MASK;
3899 *instruction |= new_inst << DATA_OP_SHIFT;
3900 return value;
3901 }
3902
3903 static int
3904 data_op2 (str)
3905 char ** str;
3906 {
3907 int value;
3908 expressionS expr;
3909
3910 skip_whitespace (* str);
3911
3912 if (reg_required_here (str, 0) != FAIL)
3913 {
3914 if (skip_past_comma (str) == SUCCESS)
3915 /* Shift operation on register. */
3916 return decode_shift (str, NO_SHIFT_RESTRICT);
3917
3918 return SUCCESS;
3919 }
3920 else
3921 {
3922 /* Immediate expression. */
3923 if (is_immediate_prefix (**str))
3924 {
3925 (*str)++;
3926 inst.error = NULL;
3927
3928 if (my_get_expression (&inst.reloc.exp, str))
3929 return FAIL;
3930
3931 if (inst.reloc.exp.X_add_symbol)
3932 {
3933 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
3934 inst.reloc.pc_rel = 0;
3935 }
3936 else
3937 {
3938 if (skip_past_comma (str) == SUCCESS)
3939 {
3940 /* #x, y -- ie explicit rotation by Y. */
3941 if (my_get_expression (&expr, str))
3942 return FAIL;
3943
3944 if (expr.X_op != O_constant)
3945 {
3946 inst.error = _("Constant expression expected");
3947 return FAIL;
3948 }
3949
3950 /* Rotate must be a multiple of 2. */
3951 if (((unsigned) expr.X_add_number) > 30
3952 || (expr.X_add_number & 1) != 0
3953 || ((unsigned) inst.reloc.exp.X_add_number) > 255)
3954 {
3955 inst.error = _("Invalid constant");
3956 return FAIL;
3957 }
3958 inst.instruction |= INST_IMMEDIATE;
3959 inst.instruction |= inst.reloc.exp.X_add_number;
3960 inst.instruction |= expr.X_add_number << 7;
3961 return SUCCESS;
3962 }
3963
3964 /* Implicit rotation, select a suitable one. */
3965 value = validate_immediate (inst.reloc.exp.X_add_number);
3966
3967 if (value == FAIL)
3968 {
3969 /* Can't be done. Perhaps the code reads something like
3970 "add Rd, Rn, #-n", where "sub Rd, Rn, #n" would be OK. */
3971 if ((value = negate_data_op (&inst.instruction,
3972 inst.reloc.exp.X_add_number))
3973 == FAIL)
3974 {
3975 inst.error = _("Invalid constant");
3976 return FAIL;
3977 }
3978 }
3979
3980 inst.instruction |= value;
3981 }
3982
3983 inst.instruction |= INST_IMMEDIATE;
3984 return SUCCESS;
3985 }
3986
3987 (*str)++;
3988 inst.error = _("Register or shift expression expected");
3989 return FAIL;
3990 }
3991 }
3992
3993 static int
3994 fp_op2 (str)
3995 char ** str;
3996 {
3997 skip_whitespace (* str);
3998
3999 if (fp_reg_required_here (str, 0) != FAIL)
4000 return SUCCESS;
4001 else
4002 {
4003 /* Immediate expression. */
4004 if (*((*str)++) == '#')
4005 {
4006 int i;
4007
4008 inst.error = NULL;
4009
4010 skip_whitespace (* str);
4011
4012 /* First try and match exact strings, this is to guarantee
4013 that some formats will work even for cross assembly. */
4014
4015 for (i = 0; fp_const[i]; i++)
4016 {
4017 if (strncmp (*str, fp_const[i], strlen (fp_const[i])) == 0)
4018 {
4019 char *start = *str;
4020
4021 *str += strlen (fp_const[i]);
4022 if (is_end_of_line[(unsigned char) **str])
4023 {
4024 inst.instruction |= i + 8;
4025 return SUCCESS;
4026 }
4027 *str = start;
4028 }
4029 }
4030
4031 /* Just because we didn't get a match doesn't mean that the
4032 constant isn't valid, just that it is in a format that we
4033 don't automatically recognize. Try parsing it with
4034 the standard expression routines. */
4035 if ((i = my_get_float_expression (str)) >= 0)
4036 {
4037 inst.instruction |= i + 8;
4038 return SUCCESS;
4039 }
4040
4041 inst.error = _("Invalid floating point immediate expression");
4042 return FAIL;
4043 }
4044 inst.error =
4045 _("Floating point register or immediate expression expected");
4046 return FAIL;
4047 }
4048 }
4049
4050 static void
4051 do_arit (str, flags)
4052 char * str;
4053 unsigned long flags;
4054 {
4055 skip_whitespace (str);
4056
4057 if (reg_required_here (&str, 12) == FAIL
4058 || skip_past_comma (&str) == FAIL
4059 || reg_required_here (&str, 16) == FAIL
4060 || skip_past_comma (&str) == FAIL
4061 || data_op2 (&str) == FAIL)
4062 {
4063 if (!inst.error)
4064 inst.error = BAD_ARGS;
4065 return;
4066 }
4067
4068 inst.instruction |= flags;
4069 end_of_line (str);
4070 return;
4071 }
4072
4073 static void
4074 do_adr (str, flags)
4075 char * str;
4076 unsigned long flags;
4077 {
4078 /* This is a pseudo-op of the form "adr rd, label" to be converted
4079 into a relative address of the form "add rd, pc, #label-.-8". */
4080 skip_whitespace (str);
4081
4082 if (reg_required_here (&str, 12) == FAIL
4083 || skip_past_comma (&str) == FAIL
4084 || my_get_expression (&inst.reloc.exp, &str))
4085 {
4086 if (!inst.error)
4087 inst.error = BAD_ARGS;
4088 return;
4089 }
4090
4091 /* Frag hacking will turn this into a sub instruction if the offset turns
4092 out to be negative. */
4093 inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE;
4094 inst.reloc.exp.X_add_number -= 8; /* PC relative adjust. */
4095 inst.reloc.pc_rel = 1;
4096 inst.instruction |= flags;
4097
4098 end_of_line (str);
4099 }
4100
4101 static void
4102 do_adrl (str, flags)
4103 char * str;
4104 unsigned long flags;
4105 {
4106 /* This is a pseudo-op of the form "adrl rd, label" to be converted
4107 into a relative address of the form:
4108 add rd, pc, #low(label-.-8)"
4109 add rd, rd, #high(label-.-8)" */
4110
4111 skip_whitespace (str);
4112
4113 if (reg_required_here (& str, 12) == FAIL
4114 || skip_past_comma (& str) == FAIL
4115 || my_get_expression (& inst.reloc.exp, & str))
4116 {
4117 if (!inst.error)
4118 inst.error = BAD_ARGS;
4119 return;
4120 }
4121
4122 end_of_line (str);
4123
4124 /* Frag hacking will turn this into a sub instruction if the offset turns
4125 out to be negative. */
4126 inst.reloc.type = BFD_RELOC_ARM_ADRL_IMMEDIATE;
4127 inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */
4128 inst.reloc.pc_rel = 1;
4129 inst.instruction |= flags;
4130 inst.size = INSN_SIZE * 2;
4131
4132 return;
4133 }
4134
4135 static void
4136 do_cmp (str, flags)
4137 char * str;
4138 unsigned long flags;
4139 {
4140 skip_whitespace (str);
4141
4142 if (reg_required_here (&str, 16) == FAIL)
4143 {
4144 if (!inst.error)
4145 inst.error = BAD_ARGS;
4146 return;
4147 }
4148
4149 if (skip_past_comma (&str) == FAIL
4150 || data_op2 (&str) == FAIL)
4151 {
4152 if (!inst.error)
4153 inst.error = BAD_ARGS;
4154 return;
4155 }
4156
4157 inst.instruction |= flags;
4158 if ((flags & 0x0000f000) == 0)
4159 inst.instruction |= CONDS_BIT;
4160
4161 end_of_line (str);
4162 return;
4163 }
4164
4165 static void
4166 do_mov (str, flags)
4167 char * str;
4168 unsigned long flags;
4169 {
4170 skip_whitespace (str);
4171
4172 if (reg_required_here (&str, 12) == FAIL)
4173 {
4174 if (!inst.error)
4175 inst.error = BAD_ARGS;
4176 return;
4177 }
4178
4179 if (skip_past_comma (&str) == FAIL
4180 || data_op2 (&str) == FAIL)
4181 {
4182 if (!inst.error)
4183 inst.error = BAD_ARGS;
4184 return;
4185 }
4186
4187 inst.instruction |= flags;
4188 end_of_line (str);
4189 return;
4190 }
4191
4192 static int
4193 ldst_extend (str, hwse)
4194 char ** str;
4195 int hwse;
4196 {
4197 int add = INDEX_UP;
4198
4199 switch (**str)
4200 {
4201 case '#':
4202 case '$':
4203 (*str)++;
4204 if (my_get_expression (& inst.reloc.exp, str))
4205 return FAIL;
4206
4207 if (inst.reloc.exp.X_op == O_constant)
4208 {
4209 int value = inst.reloc.exp.X_add_number;
4210
4211 if ((hwse && (value < -255 || value > 255))
4212 || (value < -4095 || value > 4095))
4213 {
4214 inst.error = _("address offset too large");
4215 return FAIL;
4216 }
4217
4218 if (value < 0)
4219 {
4220 value = -value;
4221 add = 0;
4222 }
4223
4224 /* Halfword and signextension instructions have the
4225 immediate value split across bits 11..8 and bits 3..0. */
4226 if (hwse)
4227 inst.instruction |= (add | HWOFFSET_IMM
4228 | ((value >> 4) << 8) | (value & 0xF));
4229 else
4230 inst.instruction |= add | value;
4231 }
4232 else
4233 {
4234 if (hwse)
4235 {
4236 inst.instruction |= HWOFFSET_IMM;
4237 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
4238 }
4239 else
4240 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM;
4241 inst.reloc.pc_rel = 0;
4242 }
4243 return SUCCESS;
4244
4245 case '-':
4246 add = 0;
4247 /* Fall through. */
4248
4249 case '+':
4250 (*str)++;
4251 /* Fall through. */
4252
4253 default:
4254 if (reg_required_here (str, 0) == FAIL)
4255 return FAIL;
4256
4257 if (hwse)
4258 inst.instruction |= add;
4259 else
4260 {
4261 inst.instruction |= add | OFFSET_REG;
4262 if (skip_past_comma (str) == SUCCESS)
4263 return decode_shift (str, SHIFT_RESTRICT);
4264 }
4265
4266 return SUCCESS;
4267 }
4268 }
4269
4270 static void
4271 do_ldst (str, flags)
4272 char * str;
4273 unsigned long flags;
4274 {
4275 int halfword = 0;
4276 int pre_inc = 0;
4277 int conflict_reg;
4278 int value;
4279
4280 /* This is not ideal, but it is the simplest way of dealing with the
4281 ARM7T halfword instructions (since they use a different
4282 encoding, but the same mnemonic): */
4283 halfword = (flags & 0x80000000) != 0;
4284 if (halfword)
4285 {
4286 /* This is actually a load/store of a halfword, or a
4287 signed-extension load. */
4288 if ((cpu_variant & ARM_EXT_HALFWORD) == 0)
4289 {
4290 inst.error
4291 = _("Processor does not support halfwords or signed bytes");
4292 return;
4293 }
4294
4295 inst.instruction = ((inst.instruction & COND_MASK)
4296 | (flags & ~COND_MASK));
4297
4298 flags = 0;
4299 }
4300
4301 skip_whitespace (str);
4302
4303 if ((conflict_reg = reg_required_here (& str, 12)) == FAIL)
4304 {
4305 if (!inst.error)
4306 inst.error = BAD_ARGS;
4307 return;
4308 }
4309
4310 if (skip_past_comma (& str) == FAIL)
4311 {
4312 inst.error = _("Address expected");
4313 return;
4314 }
4315
4316 if (*str == '[')
4317 {
4318 int reg;
4319
4320 str++;
4321
4322 skip_whitespace (str);
4323
4324 if ((reg = reg_required_here (&str, 16)) == FAIL)
4325 return;
4326
4327 /* Conflicts can occur on stores as well as loads. */
4328 conflict_reg = (conflict_reg == reg);
4329
4330 skip_whitespace (str);
4331
4332 if (*str == ']')
4333 {
4334 str ++;
4335
4336 if (skip_past_comma (&str) == SUCCESS)
4337 {
4338 /* [Rn],... (post inc) */
4339 if (ldst_extend (&str, halfword) == FAIL)
4340 return;
4341 if (conflict_reg)
4342 {
4343 if (flags & TRANS_BIT)
4344 as_warn (_("Rn and Rd must be different in %s"),
4345 ((inst.instruction & LOAD_BIT)
4346 ? "LDRT" : "STRT"));
4347 else
4348 as_warn (_("%s register same as write-back base"),
4349 ((inst.instruction & LOAD_BIT)
4350 ? _("destination") : _("source")));
4351 }
4352 }
4353 else
4354 {
4355 /* [Rn] */
4356 if (halfword)
4357 inst.instruction |= HWOFFSET_IMM;
4358
4359 skip_whitespace (str);
4360
4361 if (*str == '!')
4362 {
4363 if (conflict_reg)
4364 as_warn (_("%s register same as write-back base"),
4365 ((inst.instruction & LOAD_BIT)
4366 ? _("destination") : _("source")));
4367 str++;
4368 inst.instruction |= WRITE_BACK;
4369 }
4370
4371 flags |= INDEX_UP;
4372 if (flags & TRANS_BIT)
4373 {
4374 if (conflict_reg)
4375 as_warn (_("Rn and Rd must be different in %s"),
4376 ((inst.instruction & LOAD_BIT)
4377 ? "LDRT" : "STRT"));
4378 }
4379 else
4380 pre_inc = 1;
4381 }
4382 }
4383 else
4384 {
4385 /* [Rn,...] */
4386 if (skip_past_comma (&str) == FAIL)
4387 {
4388 inst.error = _("pre-indexed expression expected");
4389 return;
4390 }
4391
4392 pre_inc = 1;
4393 if (ldst_extend (&str, halfword) == FAIL)
4394 return;
4395
4396 skip_whitespace (str);
4397
4398 if (*str++ != ']')
4399 {
4400 inst.error = _("missing ]");
4401 return;
4402 }
4403
4404 skip_whitespace (str);
4405
4406 if (*str == '!')
4407 {
4408 if (conflict_reg)
4409 as_warn (_("%s register same as write-back base"),
4410 ((inst.instruction & LOAD_BIT)
4411 ? _("destination") : _("source")));
4412 str++;
4413 inst.instruction |= WRITE_BACK;
4414 }
4415 }
4416 }
4417 else if (*str == '=')
4418 {
4419 /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op. */
4420 str++;
4421
4422 skip_whitespace (str);
4423
4424 if (my_get_expression (&inst.reloc.exp, &str))
4425 return;
4426
4427 if (inst.reloc.exp.X_op != O_constant
4428 && inst.reloc.exp.X_op != O_symbol)
4429 {
4430 inst.error = _("Constant expression expected");
4431 return;
4432 }
4433
4434 if (inst.reloc.exp.X_op == O_constant
4435 && (value = validate_immediate (inst.reloc.exp.X_add_number)) != FAIL)
4436 {
4437 /* This can be done with a mov instruction. */
4438 inst.instruction &= LITERAL_MASK;
4439 inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT);
4440 inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
4441 end_of_line (str);
4442 return;
4443 }
4444 else
4445 {
4446 /* Insert into literal pool. */
4447 if (add_to_lit_pool () == FAIL)
4448 {
4449 if (!inst.error)
4450 inst.error = _("literal pool insertion failed");
4451 return;
4452 }
4453
4454 /* Change the instruction exp to point to the pool. */
4455 if (halfword)
4456 {
4457 inst.instruction |= HWOFFSET_IMM;
4458 inst.reloc.type = BFD_RELOC_ARM_HWLITERAL;
4459 }
4460 else
4461 inst.reloc.type = BFD_RELOC_ARM_LITERAL;
4462 inst.reloc.pc_rel = 1;
4463 inst.instruction |= (REG_PC << 16);
4464 pre_inc = 1;
4465 }
4466 }
4467 else
4468 {
4469 if (my_get_expression (&inst.reloc.exp, &str))
4470 return;
4471
4472 if (halfword)
4473 {
4474 inst.instruction |= HWOFFSET_IMM;
4475 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8;
4476 }
4477 else
4478 inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM;
4479 #ifndef TE_WINCE
4480 /* PC rel adjust. */
4481 inst.reloc.exp.X_add_number -= 8;
4482 #endif
4483 inst.reloc.pc_rel = 1;
4484 inst.instruction |= (REG_PC << 16);
4485 pre_inc = 1;
4486 }
4487
4488 if (pre_inc && (flags & TRANS_BIT))
4489 inst.error = _("Pre-increment instruction with translate");
4490
4491 inst.instruction |= flags | (pre_inc ? PRE_INDEX : 0);
4492 end_of_line (str);
4493 return;
4494 }
4495
4496 static long
4497 reg_list (strp)
4498 char ** strp;
4499 {
4500 char * str = * strp;
4501 long range = 0;
4502 int another_range;
4503
4504 /* We come back here if we get ranges concatenated by '+' or '|'. */
4505 do
4506 {
4507 another_range = 0;
4508
4509 if (*str == '{')
4510 {
4511 int in_range = 0;
4512 int cur_reg = -1;
4513
4514 str++;
4515 do
4516 {
4517 int reg;
4518
4519 skip_whitespace (str);
4520
4521 if ((reg = reg_required_here (& str, -1)) == FAIL)
4522 return FAIL;
4523
4524 if (in_range)
4525 {
4526 int i;
4527
4528 if (reg <= cur_reg)
4529 {
4530 inst.error = _("Bad range in register list");
4531 return FAIL;
4532 }
4533
4534 for (i = cur_reg + 1; i < reg; i++)
4535 {
4536 if (range & (1 << i))
4537 as_tsktsk
4538 (_("Warning: Duplicated register (r%d) in register list"),
4539 i);
4540 else
4541 range |= 1 << i;
4542 }
4543 in_range = 0;
4544 }
4545
4546 if (range & (1 << reg))
4547 as_tsktsk (_("Warning: Duplicated register (r%d) in register list"),
4548 reg);
4549 else if (reg <= cur_reg)
4550 as_tsktsk (_("Warning: Register range not in ascending order"));
4551
4552 range |= 1 << reg;
4553 cur_reg = reg;
4554 }
4555 while (skip_past_comma (&str) != FAIL
4556 || (in_range = 1, *str++ == '-'));
4557 str--;
4558 skip_whitespace (str);
4559
4560 if (*str++ != '}')
4561 {
4562 inst.error = _("Missing `}'");
4563 return FAIL;
4564 }
4565 }
4566 else
4567 {
4568 expressionS expr;
4569
4570 if (my_get_expression (&expr, &str))
4571 return FAIL;
4572
4573 if (expr.X_op == O_constant)
4574 {
4575 if (expr.X_add_number
4576 != (expr.X_add_number & 0x0000ffff))
4577 {
4578 inst.error = _("invalid register mask");
4579 return FAIL;
4580 }
4581
4582 if ((range & expr.X_add_number) != 0)
4583 {
4584 int regno = range & expr.X_add_number;
4585
4586 regno &= -regno;
4587 regno = (1 << regno) - 1;
4588 as_tsktsk
4589 (_("Warning: Duplicated register (r%d) in register list"),
4590 regno);
4591 }
4592
4593 range |= expr.X_add_number;
4594 }
4595 else
4596 {
4597 if (inst.reloc.type != 0)
4598 {
4599 inst.error = _("expression too complex");
4600 return FAIL;
4601 }
4602
4603 memcpy (&inst.reloc.exp, &expr, sizeof (expressionS));
4604 inst.reloc.type = BFD_RELOC_ARM_MULTI;
4605 inst.reloc.pc_rel = 0;
4606 }
4607 }
4608
4609 skip_whitespace (str);
4610
4611 if (*str == '|' || *str == '+')
4612 {
4613 str++;
4614 another_range = 1;
4615 }
4616 }
4617 while (another_range);
4618
4619 *strp = str;
4620 return range;
4621 }
4622
4623 static void
4624 do_ldmstm (str, flags)
4625 char * str;
4626 unsigned long flags;
4627 {
4628 int base_reg;
4629 long range;
4630
4631 skip_whitespace (str);
4632
4633 if ((base_reg = reg_required_here (&str, 16)) == FAIL)
4634 return;
4635
4636 if (base_reg == REG_PC)
4637 {
4638 inst.error = _("r15 not allowed as base register");
4639 return;
4640 }
4641
4642 skip_whitespace (str);
4643
4644 if (*str == '!')
4645 {
4646 flags |= WRITE_BACK;
4647 str++;
4648 }
4649
4650 if (skip_past_comma (&str) == FAIL
4651 || (range = reg_list (&str)) == FAIL)
4652 {
4653 if (! inst.error)
4654 inst.error = BAD_ARGS;
4655 return;
4656 }
4657
4658 if (*str == '^')
4659 {
4660 str++;
4661 flags |= LDM_TYPE_2_OR_3;
4662 }
4663
4664 inst.instruction |= flags | range;
4665 end_of_line (str);
4666 return;
4667 }
4668
4669 static void
4670 do_swi (str, flags)
4671 char * str;
4672 unsigned long flags;
4673 {
4674 skip_whitespace (str);
4675
4676 /* Allow optional leading '#'. */
4677 if (is_immediate_prefix (*str))
4678 str++;
4679
4680 if (my_get_expression (& inst.reloc.exp, & str))
4681 return;
4682
4683 inst.reloc.type = BFD_RELOC_ARM_SWI;
4684 inst.reloc.pc_rel = 0;
4685 inst.instruction |= flags;
4686
4687 end_of_line (str);
4688
4689 return;
4690 }
4691
4692 static void
4693 do_swap (str, flags)
4694 char * str;
4695 unsigned long flags;
4696 {
4697 int reg;
4698
4699 skip_whitespace (str);
4700
4701 if ((reg = reg_required_here (&str, 12)) == FAIL)
4702 return;
4703
4704 if (reg == REG_PC)
4705 {
4706 inst.error = _("r15 not allowed in swap");
4707 return;
4708 }
4709
4710 if (skip_past_comma (&str) == FAIL
4711 || (reg = reg_required_here (&str, 0)) == FAIL)
4712 {
4713 if (!inst.error)
4714 inst.error = BAD_ARGS;
4715 return;
4716 }
4717
4718 if (reg == REG_PC)
4719 {
4720 inst.error = _("r15 not allowed in swap");
4721 return;
4722 }
4723
4724 if (skip_past_comma (&str) == FAIL
4725 || *str++ != '[')
4726 {
4727 inst.error = BAD_ARGS;
4728 return;
4729 }
4730
4731 skip_whitespace (str);
4732
4733 if ((reg = reg_required_here (&str, 16)) == FAIL)
4734 return;
4735
4736 if (reg == REG_PC)
4737 {
4738 inst.error = BAD_PC;
4739 return;
4740 }
4741
4742 skip_whitespace (str);
4743
4744 if (*str++ != ']')
4745 {
4746 inst.error = _("missing ]");
4747 return;
4748 }
4749
4750 inst.instruction |= flags;
4751 end_of_line (str);
4752 return;
4753 }
4754
4755 static void
4756 do_branch (str, flags)
4757 char * str;
4758 unsigned long flags ATTRIBUTE_UNUSED;
4759 {
4760 if (my_get_expression (&inst.reloc.exp, &str))
4761 return;
4762
4763 #ifdef OBJ_ELF
4764 {
4765 char * save_in;
4766
4767 /* ScottB: February 5, 1998 - Check to see of PLT32 reloc
4768 required for the instruction. */
4769
4770 /* arm_parse_reloc () works on input_line_pointer.
4771 We actually want to parse the operands to the branch instruction
4772 passed in 'str'. Save the input pointer and restore it later. */
4773 save_in = input_line_pointer;
4774 input_line_pointer = str;
4775 if (inst.reloc.exp.X_op == O_symbol
4776 && *str == '('
4777 && arm_parse_reloc () == BFD_RELOC_ARM_PLT32)
4778 {
4779 inst.reloc.type = BFD_RELOC_ARM_PLT32;
4780 inst.reloc.pc_rel = 0;
4781 /* Modify str to point to after parsed operands, otherwise
4782 end_of_line() will complain about the (PLT) left in str. */
4783 str = input_line_pointer;
4784 }
4785 else
4786 {
4787 inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH;
4788 inst.reloc.pc_rel = 1;
4789 }
4790 input_line_pointer = save_in;
4791 }
4792 #else
4793 inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH;
4794 inst.reloc.pc_rel = 1;
4795 #endif /* OBJ_ELF */
4796
4797 end_of_line (str);
4798 return;
4799 }
4800
4801 static void
4802 do_bx (str, flags)
4803 char * str;
4804 unsigned long flags ATTRIBUTE_UNUSED;
4805 {
4806 int reg;
4807
4808 skip_whitespace (str);
4809
4810 if ((reg = reg_required_here (&str, 0)) == FAIL)
4811 {
4812 inst.error = BAD_ARGS;
4813 return;
4814 }
4815
4816 /* Note - it is not illegal to do a "bx pc". Useless, but not illegal. */
4817 if (reg == REG_PC)
4818 as_tsktsk (_("Use of r15 in bx in ARM mode is not really useful"));
4819
4820 end_of_line (str);
4821 }
4822
4823 static void
4824 do_cdp (str, flags)
4825 char * str;
4826 unsigned long flags ATTRIBUTE_UNUSED;
4827 {
4828 /* Co-processor data operation.
4829 Format: CDP{cond} CP#,<expr>,CRd,CRn,CRm{,<expr>} */
4830 skip_whitespace (str);
4831
4832 if (co_proc_number (&str) == FAIL)
4833 {
4834 if (!inst.error)
4835 inst.error = BAD_ARGS;
4836 return;
4837 }
4838
4839 if (skip_past_comma (&str) == FAIL
4840 || cp_opc_expr (&str, 20,4) == 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, 12) == FAIL)
4849 {
4850 if (!inst.error)
4851 inst.error = BAD_ARGS;
4852 return;
4853 }
4854
4855 if (skip_past_comma (&str) == FAIL
4856 || cp_reg_required_here (&str, 16) == FAIL)
4857 {
4858 if (!inst.error)
4859 inst.error = BAD_ARGS;
4860 return;
4861 }
4862
4863 if (skip_past_comma (&str) == FAIL
4864 || cp_reg_required_here (&str, 0) == FAIL)
4865 {
4866 if (!inst.error)
4867 inst.error = BAD_ARGS;
4868 return;
4869 }
4870
4871 if (skip_past_comma (&str) == SUCCESS)
4872 {
4873 if (cp_opc_expr (&str, 5, 3) == FAIL)
4874 {
4875 if (!inst.error)
4876 inst.error = BAD_ARGS;
4877 return;
4878 }
4879 }
4880
4881 end_of_line (str);
4882 return;
4883 }
4884
4885 static void
4886 do_lstc (str, flags)
4887 char * str;
4888 unsigned long flags;
4889 {
4890 /* Co-processor register load/store.
4891 Format: <LDC|STC{cond}[L] CP#,CRd,<address> */
4892
4893 skip_whitespace (str);
4894
4895 if (co_proc_number (&str) == FAIL)
4896 {
4897 if (!inst.error)
4898 inst.error = BAD_ARGS;
4899 return;
4900 }
4901
4902 if (skip_past_comma (&str) == FAIL
4903 || cp_reg_required_here (&str, 12) == FAIL)
4904 {
4905 if (!inst.error)
4906 inst.error = BAD_ARGS;
4907 return;
4908 }
4909
4910 if (skip_past_comma (&str) == FAIL
4911 || cp_address_required_here (&str) == FAIL)
4912 {
4913 if (! inst.error)
4914 inst.error = BAD_ARGS;
4915 return;
4916 }
4917
4918 inst.instruction |= flags;
4919 end_of_line (str);
4920 return;
4921 }
4922
4923 static void
4924 do_co_reg (str, flags)
4925 char * str;
4926 unsigned long flags;
4927 {
4928 /* Co-processor register transfer.
4929 Format: <MCR|MRC>{cond} CP#,<expr1>,Rd,CRn,CRm{,<expr2>} */
4930
4931 skip_whitespace (str);
4932
4933 if (co_proc_number (&str) == FAIL)
4934 {
4935 if (!inst.error)
4936 inst.error = BAD_ARGS;
4937 return;
4938 }
4939
4940 if (skip_past_comma (&str) == FAIL
4941 || cp_opc_expr (&str, 21, 3) == FAIL)
4942 {
4943 if (!inst.error)
4944 inst.error = BAD_ARGS;
4945 return;
4946 }
4947
4948 if (skip_past_comma (&str) == FAIL
4949 || reg_required_here (&str, 12) == FAIL)
4950 {
4951 if (!inst.error)
4952 inst.error = BAD_ARGS;
4953 return;
4954 }
4955
4956 if (skip_past_comma (&str) == FAIL
4957 || cp_reg_required_here (&str, 16) == FAIL)
4958 {
4959 if (!inst.error)
4960 inst.error = BAD_ARGS;
4961 return;
4962 }
4963
4964 if (skip_past_comma (&str) == FAIL
4965 || cp_reg_required_here (&str, 0) == FAIL)
4966 {
4967 if (!inst.error)
4968 inst.error = BAD_ARGS;
4969 return;
4970 }
4971
4972 if (skip_past_comma (&str) == SUCCESS)
4973 {
4974 if (cp_opc_expr (&str, 5, 3) == FAIL)
4975 {
4976 if (!inst.error)
4977 inst.error = BAD_ARGS;
4978 return;
4979 }
4980 }
4981 if (flags)
4982 {
4983 inst.error = BAD_COND;
4984 }
4985
4986 end_of_line (str);
4987 return;
4988 }
4989
4990 static void
4991 do_fp_ctrl (str, flags)
4992 char * str;
4993 unsigned long flags ATTRIBUTE_UNUSED;
4994 {
4995 /* FP control registers.
4996 Format: <WFS|RFS|WFC|RFC>{cond} Rn */
4997
4998 skip_whitespace (str);
4999
5000 if (reg_required_here (&str, 12) == FAIL)
5001 {
5002 if (!inst.error)
5003 inst.error = BAD_ARGS;
5004 return;
5005 }
5006
5007 end_of_line (str);
5008 return;
5009 }
5010
5011 static void
5012 do_fp_ldst (str, flags)
5013 char * str;
5014 unsigned long flags ATTRIBUTE_UNUSED;
5015 {
5016 skip_whitespace (str);
5017
5018 switch (inst.suffix)
5019 {
5020 case SUFF_S:
5021 break;
5022 case SUFF_D:
5023 inst.instruction |= CP_T_X;
5024 break;
5025 case SUFF_E:
5026 inst.instruction |= CP_T_Y;
5027 break;
5028 case SUFF_P:
5029 inst.instruction |= CP_T_X | CP_T_Y;
5030 break;
5031 default:
5032 abort ();
5033 }
5034
5035 if (fp_reg_required_here (&str, 12) == FAIL)
5036 {
5037 if (!inst.error)
5038 inst.error = BAD_ARGS;
5039 return;
5040 }
5041
5042 if (skip_past_comma (&str) == FAIL
5043 || cp_address_required_here (&str) == FAIL)
5044 {
5045 if (!inst.error)
5046 inst.error = BAD_ARGS;
5047 return;
5048 }
5049
5050 end_of_line (str);
5051 }
5052
5053 static void
5054 do_fp_ldmstm (str, flags)
5055 char * str;
5056 unsigned long flags;
5057 {
5058 int num_regs;
5059
5060 skip_whitespace (str);
5061
5062 if (fp_reg_required_here (&str, 12) == FAIL)
5063 {
5064 if (! inst.error)
5065 inst.error = BAD_ARGS;
5066 return;
5067 }
5068
5069 /* Get Number of registers to transfer. */
5070 if (skip_past_comma (&str) == FAIL
5071 || my_get_expression (&inst.reloc.exp, &str))
5072 {
5073 if (! inst.error)
5074 inst.error = _("constant expression expected");
5075 return;
5076 }
5077
5078 if (inst.reloc.exp.X_op != O_constant)
5079 {
5080 inst.error = _("Constant value required for number of registers");
5081 return;
5082 }
5083
5084 num_regs = inst.reloc.exp.X_add_number;
5085
5086 if (num_regs < 1 || num_regs > 4)
5087 {
5088 inst.error = _("number of registers must be in the range [1:4]");
5089 return;
5090 }
5091
5092 switch (num_regs)
5093 {
5094 case 1:
5095 inst.instruction |= CP_T_X;
5096 break;
5097 case 2:
5098 inst.instruction |= CP_T_Y;
5099 break;
5100 case 3:
5101 inst.instruction |= CP_T_Y | CP_T_X;
5102 break;
5103 case 4:
5104 break;
5105 default:
5106 abort ();
5107 }
5108
5109 if (flags)
5110 {
5111 int reg;
5112 int write_back;
5113 int offset;
5114
5115 /* The instruction specified "ea" or "fd", so we can only accept
5116 [Rn]{!}. The instruction does not really support stacking or
5117 unstacking, so we have to emulate these by setting appropriate
5118 bits and offsets. */
5119 if (skip_past_comma (&str) == FAIL
5120 || *str != '[')
5121 {
5122 if (! inst.error)
5123 inst.error = BAD_ARGS;
5124 return;
5125 }
5126
5127 str++;
5128 skip_whitespace (str);
5129
5130 if ((reg = reg_required_here (&str, 16)) == FAIL)
5131 return;
5132
5133 skip_whitespace (str);
5134
5135 if (*str != ']')
5136 {
5137 inst.error = BAD_ARGS;
5138 return;
5139 }
5140
5141 str++;
5142 if (*str == '!')
5143 {
5144 write_back = 1;
5145 str++;
5146 if (reg == REG_PC)
5147 {
5148 inst.error =
5149 _("R15 not allowed as base register with write-back");
5150 return;
5151 }
5152 }
5153 else
5154 write_back = 0;
5155
5156 if (flags & CP_T_Pre)
5157 {
5158 /* Pre-decrement. */
5159 offset = 3 * num_regs;
5160 if (write_back)
5161 flags |= CP_T_WB;
5162 }
5163 else
5164 {
5165 /* Post-increment. */
5166 if (write_back)
5167 {
5168 flags |= CP_T_WB;
5169 offset = 3 * num_regs;
5170 }
5171 else
5172 {
5173 /* No write-back, so convert this into a standard pre-increment
5174 instruction -- aesthetically more pleasing. */
5175 flags = CP_T_Pre | CP_T_UD;
5176 offset = 0;
5177 }
5178 }
5179
5180 inst.instruction |= flags | offset;
5181 }
5182 else if (skip_past_comma (&str) == FAIL
5183 || cp_address_required_here (&str) == FAIL)
5184 {
5185 if (! inst.error)
5186 inst.error = BAD_ARGS;
5187 return;
5188 }
5189
5190 end_of_line (str);
5191 }
5192
5193 static void
5194 do_fp_dyadic (str, flags)
5195 char * str;
5196 unsigned long flags;
5197 {
5198 skip_whitespace (str);
5199
5200 switch (inst.suffix)
5201 {
5202 case SUFF_S:
5203 break;
5204 case SUFF_D:
5205 inst.instruction |= 0x00000080;
5206 break;
5207 case SUFF_E:
5208 inst.instruction |= 0x00080000;
5209 break;
5210 default:
5211 abort ();
5212 }
5213
5214 if (fp_reg_required_here (&str, 12) == FAIL)
5215 {
5216 if (! inst.error)
5217 inst.error = BAD_ARGS;
5218 return;
5219 }
5220
5221 if (skip_past_comma (&str) == FAIL
5222 || fp_reg_required_here (&str, 16) == FAIL)
5223 {
5224 if (! inst.error)
5225 inst.error = BAD_ARGS;
5226 return;
5227 }
5228
5229 if (skip_past_comma (&str) == FAIL
5230 || fp_op2 (&str) == FAIL)
5231 {
5232 if (! inst.error)
5233 inst.error = BAD_ARGS;
5234 return;
5235 }
5236
5237 inst.instruction |= flags;
5238 end_of_line (str);
5239 return;
5240 }
5241
5242 static void
5243 do_fp_monadic (str, flags)
5244 char * str;
5245 unsigned long flags;
5246 {
5247 skip_whitespace (str);
5248
5249 switch (inst.suffix)
5250 {
5251 case SUFF_S:
5252 break;
5253 case SUFF_D:
5254 inst.instruction |= 0x00000080;
5255 break;
5256 case SUFF_E:
5257 inst.instruction |= 0x00080000;
5258 break;
5259 default:
5260 abort ();
5261 }
5262
5263 if (fp_reg_required_here (&str, 12) == FAIL)
5264 {
5265 if (! inst.error)
5266 inst.error = BAD_ARGS;
5267 return;
5268 }
5269
5270 if (skip_past_comma (&str) == FAIL
5271 || fp_op2 (&str) == FAIL)
5272 {
5273 if (! inst.error)
5274 inst.error = BAD_ARGS;
5275 return;
5276 }
5277
5278 inst.instruction |= flags;
5279 end_of_line (str);
5280 return;
5281 }
5282
5283 static void
5284 do_fp_cmp (str, flags)
5285 char * str;
5286 unsigned long flags;
5287 {
5288 skip_whitespace (str);
5289
5290 if (fp_reg_required_here (&str, 16) == FAIL)
5291 {
5292 if (! inst.error)
5293 inst.error = BAD_ARGS;
5294 return;
5295 }
5296
5297 if (skip_past_comma (&str) == FAIL
5298 || fp_op2 (&str) == FAIL)
5299 {
5300 if (! inst.error)
5301 inst.error = BAD_ARGS;
5302 return;
5303 }
5304
5305 inst.instruction |= flags;
5306 end_of_line (str);
5307 return;
5308 }
5309
5310 static void
5311 do_fp_from_reg (str, flags)
5312 char * str;
5313 unsigned long flags;
5314 {
5315 skip_whitespace (str);
5316
5317 switch (inst.suffix)
5318 {
5319 case SUFF_S:
5320 break;
5321 case SUFF_D:
5322 inst.instruction |= 0x00000080;
5323 break;
5324 case SUFF_E:
5325 inst.instruction |= 0x00080000;
5326 break;
5327 default:
5328 abort ();
5329 }
5330
5331 if (fp_reg_required_here (&str, 16) == FAIL)
5332 {
5333 if (! inst.error)
5334 inst.error = BAD_ARGS;
5335 return;
5336 }
5337
5338 if (skip_past_comma (&str) == FAIL
5339 || reg_required_here (&str, 12) == FAIL)
5340 {
5341 if (! inst.error)
5342 inst.error = BAD_ARGS;
5343 return;
5344 }
5345
5346 inst.instruction |= flags;
5347 end_of_line (str);
5348 return;
5349 }
5350
5351 static void
5352 do_fp_to_reg (str, flags)
5353 char * str;
5354 unsigned long flags;
5355 {
5356 skip_whitespace (str);
5357
5358 if (reg_required_here (&str, 12) == FAIL)
5359 return;
5360
5361 if (skip_past_comma (&str) == FAIL
5362 || fp_reg_required_here (&str, 0) == FAIL)
5363 {
5364 if (! inst.error)
5365 inst.error = BAD_ARGS;
5366 return;
5367 }
5368
5369 inst.instruction |= flags;
5370 end_of_line (str);
5371 return;
5372 }
5373
5374 /* Thumb specific routines. */
5375
5376 /* Parse and validate that a register is of the right form, this saves
5377 repeated checking of this information in many similar cases.
5378 Unlike the 32-bit case we do not insert the register into the opcode
5379 here, since the position is often unknown until the full instruction
5380 has been parsed. */
5381
5382 static int
5383 thumb_reg (strp, hi_lo)
5384 char ** strp;
5385 int hi_lo;
5386 {
5387 int reg;
5388
5389 if ((reg = reg_required_here (strp, -1)) == FAIL)
5390 return FAIL;
5391
5392 switch (hi_lo)
5393 {
5394 case THUMB_REG_LO:
5395 if (reg > 7)
5396 {
5397 inst.error = _("lo register required");
5398 return FAIL;
5399 }
5400 break;
5401
5402 case THUMB_REG_HI:
5403 if (reg < 8)
5404 {
5405 inst.error = _("hi register required");
5406 return FAIL;
5407 }
5408 break;
5409
5410 default:
5411 break;
5412 }
5413
5414 return reg;
5415 }
5416
5417 /* Parse an add or subtract instruction, SUBTRACT is non-zero if the opcode
5418 was SUB. */
5419
5420 static void
5421 thumb_add_sub (str, subtract)
5422 char * str;
5423 int subtract;
5424 {
5425 int Rd, Rs, Rn = FAIL;
5426
5427 skip_whitespace (str);
5428
5429 if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL
5430 || skip_past_comma (&str) == FAIL)
5431 {
5432 if (! inst.error)
5433 inst.error = BAD_ARGS;
5434 return;
5435 }
5436
5437 if (is_immediate_prefix (*str))
5438 {
5439 Rs = Rd;
5440 str++;
5441 if (my_get_expression (&inst.reloc.exp, &str))
5442 return;
5443 }
5444 else
5445 {
5446 if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5447 return;
5448
5449 if (skip_past_comma (&str) == FAIL)
5450 {
5451 /* Two operand format, shuffle the registers
5452 and pretend there are 3. */
5453 Rn = Rs;
5454 Rs = Rd;
5455 }
5456 else if (is_immediate_prefix (*str))
5457 {
5458 str++;
5459 if (my_get_expression (&inst.reloc.exp, &str))
5460 return;
5461 }
5462 else if ((Rn = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5463 return;
5464 }
5465
5466 /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL;
5467 for the latter case, EXPR contains the immediate that was found. */
5468 if (Rn != FAIL)
5469 {
5470 /* All register format. */
5471 if (Rd > 7 || Rs > 7 || Rn > 7)
5472 {
5473 if (Rs != Rd)
5474 {
5475 inst.error = _("dest and source1 must be the same register");
5476 return;
5477 }
5478
5479 /* Can't do this for SUB. */
5480 if (subtract)
5481 {
5482 inst.error = _("subtract valid only on lo regs");
5483 return;
5484 }
5485
5486 inst.instruction = (T_OPCODE_ADD_HI
5487 | (Rd > 7 ? THUMB_H1 : 0)
5488 | (Rn > 7 ? THUMB_H2 : 0));
5489 inst.instruction |= (Rd & 7) | ((Rn & 7) << 3);
5490 }
5491 else
5492 {
5493 inst.instruction = subtract ? T_OPCODE_SUB_R3 : T_OPCODE_ADD_R3;
5494 inst.instruction |= Rd | (Rs << 3) | (Rn << 6);
5495 }
5496 }
5497 else
5498 {
5499 /* Immediate expression, now things start to get nasty. */
5500
5501 /* First deal with HI regs, only very restricted cases allowed:
5502 Adjusting SP, and using PC or SP to get an address. */
5503 if ((Rd > 7 && (Rd != REG_SP || Rs != REG_SP))
5504 || (Rs > 7 && Rs != REG_SP && Rs != REG_PC))
5505 {
5506 inst.error = _("invalid Hi register with immediate");
5507 return;
5508 }
5509
5510 if (inst.reloc.exp.X_op != O_constant)
5511 {
5512 /* Value isn't known yet, all we can do is store all the fragments
5513 we know about in the instruction and let the reloc hacking
5514 work it all out. */
5515 inst.instruction = (subtract ? 0x8000 : 0) | (Rd << 4) | Rs;
5516 inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD;
5517 }
5518 else
5519 {
5520 int offset = inst.reloc.exp.X_add_number;
5521
5522 if (subtract)
5523 offset = -offset;
5524
5525 if (offset < 0)
5526 {
5527 offset = -offset;
5528 subtract = 1;
5529
5530 /* Quick check, in case offset is MIN_INT. */
5531 if (offset < 0)
5532 {
5533 inst.error = _("immediate value out of range");
5534 return;
5535 }
5536 }
5537 else
5538 subtract = 0;
5539
5540 if (Rd == REG_SP)
5541 {
5542 if (offset & ~0x1fc)
5543 {
5544 inst.error = _("invalid immediate value for stack adjust");
5545 return;
5546 }
5547 inst.instruction = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST;
5548 inst.instruction |= offset >> 2;
5549 }
5550 else if (Rs == REG_PC || Rs == REG_SP)
5551 {
5552 if (subtract
5553 || (offset & ~0x3fc))
5554 {
5555 inst.error = _("invalid immediate for address calculation");
5556 return;
5557 }
5558 inst.instruction = (Rs == REG_PC ? T_OPCODE_ADD_PC
5559 : T_OPCODE_ADD_SP);
5560 inst.instruction |= (Rd << 8) | (offset >> 2);
5561 }
5562 else if (Rs == Rd)
5563 {
5564 if (offset & ~0xff)
5565 {
5566 inst.error = _("immediate value out of range");
5567 return;
5568 }
5569 inst.instruction = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8;
5570 inst.instruction |= (Rd << 8) | offset;
5571 }
5572 else
5573 {
5574 if (offset & ~0x7)
5575 {
5576 inst.error = _("immediate value out of range");
5577 return;
5578 }
5579 inst.instruction = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3;
5580 inst.instruction |= Rd | (Rs << 3) | (offset << 6);
5581 }
5582 }
5583 }
5584
5585 end_of_line (str);
5586 }
5587
5588 static void
5589 thumb_shift (str, shift)
5590 char * str;
5591 int shift;
5592 {
5593 int Rd, Rs, Rn = FAIL;
5594
5595 skip_whitespace (str);
5596
5597 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
5598 || skip_past_comma (&str) == FAIL)
5599 {
5600 if (! inst.error)
5601 inst.error = BAD_ARGS;
5602 return;
5603 }
5604
5605 if (is_immediate_prefix (*str))
5606 {
5607 /* Two operand immediate format, set Rs to Rd. */
5608 Rs = Rd;
5609 str ++;
5610 if (my_get_expression (&inst.reloc.exp, &str))
5611 return;
5612 }
5613 else
5614 {
5615 if ((Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5616 return;
5617
5618 if (skip_past_comma (&str) == FAIL)
5619 {
5620 /* Two operand format, shuffle the registers
5621 and pretend there are 3. */
5622 Rn = Rs;
5623 Rs = Rd;
5624 }
5625 else if (is_immediate_prefix (*str))
5626 {
5627 str++;
5628 if (my_get_expression (&inst.reloc.exp, &str))
5629 return;
5630 }
5631 else if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5632 return;
5633 }
5634
5635 /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL;
5636 for the latter case, EXPR contains the immediate that was found. */
5637
5638 if (Rn != FAIL)
5639 {
5640 if (Rs != Rd)
5641 {
5642 inst.error = _("source1 and dest must be same register");
5643 return;
5644 }
5645
5646 switch (shift)
5647 {
5648 case THUMB_ASR: inst.instruction = T_OPCODE_ASR_R; break;
5649 case THUMB_LSL: inst.instruction = T_OPCODE_LSL_R; break;
5650 case THUMB_LSR: inst.instruction = T_OPCODE_LSR_R; break;
5651 }
5652
5653 inst.instruction |= Rd | (Rn << 3);
5654 }
5655 else
5656 {
5657 switch (shift)
5658 {
5659 case THUMB_ASR: inst.instruction = T_OPCODE_ASR_I; break;
5660 case THUMB_LSL: inst.instruction = T_OPCODE_LSL_I; break;
5661 case THUMB_LSR: inst.instruction = T_OPCODE_LSR_I; break;
5662 }
5663
5664 if (inst.reloc.exp.X_op != O_constant)
5665 {
5666 /* Value isn't known yet, create a dummy reloc and let reloc
5667 hacking fix it up. */
5668 inst.reloc.type = BFD_RELOC_ARM_THUMB_SHIFT;
5669 }
5670 else
5671 {
5672 unsigned shift_value = inst.reloc.exp.X_add_number;
5673
5674 if (shift_value > 32 || (shift_value == 32 && shift == THUMB_LSL))
5675 {
5676 inst.error = _("Invalid immediate for shift");
5677 return;
5678 }
5679
5680 /* Shifts of zero are handled by converting to LSL. */
5681 if (shift_value == 0)
5682 inst.instruction = T_OPCODE_LSL_I;
5683
5684 /* Shifts of 32 are encoded as a shift of zero. */
5685 if (shift_value == 32)
5686 shift_value = 0;
5687
5688 inst.instruction |= shift_value << 6;
5689 }
5690
5691 inst.instruction |= Rd | (Rs << 3);
5692 }
5693
5694 end_of_line (str);
5695 }
5696
5697 static void
5698 thumb_mov_compare (str, move)
5699 char * str;
5700 int move;
5701 {
5702 int Rd, Rs = FAIL;
5703
5704 skip_whitespace (str);
5705
5706 if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL
5707 || skip_past_comma (&str) == FAIL)
5708 {
5709 if (! inst.error)
5710 inst.error = BAD_ARGS;
5711 return;
5712 }
5713
5714 if (is_immediate_prefix (*str))
5715 {
5716 str++;
5717 if (my_get_expression (&inst.reloc.exp, &str))
5718 return;
5719 }
5720 else if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5721 return;
5722
5723 if (Rs != FAIL)
5724 {
5725 if (Rs < 8 && Rd < 8)
5726 {
5727 if (move == THUMB_MOVE)
5728 /* A move of two lowregs is encoded as ADD Rd, Rs, #0
5729 since a MOV instruction produces unpredictable results. */
5730 inst.instruction = T_OPCODE_ADD_I3;
5731 else
5732 inst.instruction = T_OPCODE_CMP_LR;
5733 inst.instruction |= Rd | (Rs << 3);
5734 }
5735 else
5736 {
5737 if (move == THUMB_MOVE)
5738 inst.instruction = T_OPCODE_MOV_HR;
5739 else
5740 inst.instruction = T_OPCODE_CMP_HR;
5741
5742 if (Rd > 7)
5743 inst.instruction |= THUMB_H1;
5744
5745 if (Rs > 7)
5746 inst.instruction |= THUMB_H2;
5747
5748 inst.instruction |= (Rd & 7) | ((Rs & 7) << 3);
5749 }
5750 }
5751 else
5752 {
5753 if (Rd > 7)
5754 {
5755 inst.error = _("only lo regs allowed with immediate");
5756 return;
5757 }
5758
5759 if (move == THUMB_MOVE)
5760 inst.instruction = T_OPCODE_MOV_I8;
5761 else
5762 inst.instruction = T_OPCODE_CMP_I8;
5763
5764 inst.instruction |= Rd << 8;
5765
5766 if (inst.reloc.exp.X_op != O_constant)
5767 inst.reloc.type = BFD_RELOC_ARM_THUMB_IMM;
5768 else
5769 {
5770 unsigned value = inst.reloc.exp.X_add_number;
5771
5772 if (value > 255)
5773 {
5774 inst.error = _("invalid immediate");
5775 return;
5776 }
5777
5778 inst.instruction |= value;
5779 }
5780 }
5781
5782 end_of_line (str);
5783 }
5784
5785 static void
5786 thumb_load_store (str, load_store, size)
5787 char * str;
5788 int load_store;
5789 int size;
5790 {
5791 int Rd, Rb, Ro = FAIL;
5792
5793 skip_whitespace (str);
5794
5795 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
5796 || skip_past_comma (&str) == FAIL)
5797 {
5798 if (! inst.error)
5799 inst.error = BAD_ARGS;
5800 return;
5801 }
5802
5803 if (*str == '[')
5804 {
5805 str++;
5806 if ((Rb = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
5807 return;
5808
5809 if (skip_past_comma (&str) != FAIL)
5810 {
5811 if (is_immediate_prefix (*str))
5812 {
5813 str++;
5814 if (my_get_expression (&inst.reloc.exp, &str))
5815 return;
5816 }
5817 else if ((Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
5818 return;
5819 }
5820 else
5821 {
5822 inst.reloc.exp.X_op = O_constant;
5823 inst.reloc.exp.X_add_number = 0;
5824 }
5825
5826 if (*str != ']')
5827 {
5828 inst.error = _("expected ']'");
5829 return;
5830 }
5831 str++;
5832 }
5833 else if (*str == '=')
5834 {
5835 /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op. */
5836 str++;
5837
5838 skip_whitespace (str);
5839
5840 if (my_get_expression (& inst.reloc.exp, & str))
5841 return;
5842
5843 end_of_line (str);
5844
5845 if ( inst.reloc.exp.X_op != O_constant
5846 && inst.reloc.exp.X_op != O_symbol)
5847 {
5848 inst.error = "Constant expression expected";
5849 return;
5850 }
5851
5852 if (inst.reloc.exp.X_op == O_constant
5853 && ((inst.reloc.exp.X_add_number & ~0xFF) == 0))
5854 {
5855 /* This can be done with a mov instruction. */
5856
5857 inst.instruction = T_OPCODE_MOV_I8 | (Rd << 8);
5858 inst.instruction |= inst.reloc.exp.X_add_number;
5859 return;
5860 }
5861
5862 /* Insert into literal pool. */
5863 if (add_to_lit_pool () == FAIL)
5864 {
5865 if (!inst.error)
5866 inst.error = "literal pool insertion failed";
5867 return;
5868 }
5869
5870 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5871 inst.reloc.pc_rel = 1;
5872 inst.instruction = T_OPCODE_LDR_PC | (Rd << 8);
5873 /* Adjust ARM pipeline offset to Thumb. */
5874 inst.reloc.exp.X_add_number += 4;
5875
5876 return;
5877 }
5878 else
5879 {
5880 if (my_get_expression (&inst.reloc.exp, &str))
5881 return;
5882
5883 inst.instruction = T_OPCODE_LDR_PC | (Rd << 8);
5884 inst.reloc.pc_rel = 1;
5885 inst.reloc.exp.X_add_number -= 4; /* Pipeline offset. */
5886 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5887 end_of_line (str);
5888 return;
5889 }
5890
5891 if (Rb == REG_PC || Rb == REG_SP)
5892 {
5893 if (size != THUMB_WORD)
5894 {
5895 inst.error = _("byte or halfword not valid for base register");
5896 return;
5897 }
5898 else if (Rb == REG_PC && load_store != THUMB_LOAD)
5899 {
5900 inst.error = _("R15 based store not allowed");
5901 return;
5902 }
5903 else if (Ro != FAIL)
5904 {
5905 inst.error = _("Invalid base register for register offset");
5906 return;
5907 }
5908
5909 if (Rb == REG_PC)
5910 inst.instruction = T_OPCODE_LDR_PC;
5911 else if (load_store == THUMB_LOAD)
5912 inst.instruction = T_OPCODE_LDR_SP;
5913 else
5914 inst.instruction = T_OPCODE_STR_SP;
5915
5916 inst.instruction |= Rd << 8;
5917 if (inst.reloc.exp.X_op == O_constant)
5918 {
5919 unsigned offset = inst.reloc.exp.X_add_number;
5920
5921 if (offset & ~0x3fc)
5922 {
5923 inst.error = _("invalid offset");
5924 return;
5925 }
5926
5927 inst.instruction |= offset >> 2;
5928 }
5929 else
5930 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5931 }
5932 else if (Rb > 7)
5933 {
5934 inst.error = _("invalid base register in load/store");
5935 return;
5936 }
5937 else if (Ro == FAIL)
5938 {
5939 /* Immediate offset. */
5940 if (size == THUMB_WORD)
5941 inst.instruction = (load_store == THUMB_LOAD
5942 ? T_OPCODE_LDR_IW : T_OPCODE_STR_IW);
5943 else if (size == THUMB_HALFWORD)
5944 inst.instruction = (load_store == THUMB_LOAD
5945 ? T_OPCODE_LDR_IH : T_OPCODE_STR_IH);
5946 else
5947 inst.instruction = (load_store == THUMB_LOAD
5948 ? T_OPCODE_LDR_IB : T_OPCODE_STR_IB);
5949
5950 inst.instruction |= Rd | (Rb << 3);
5951
5952 if (inst.reloc.exp.X_op == O_constant)
5953 {
5954 unsigned offset = inst.reloc.exp.X_add_number;
5955
5956 if (offset & ~(0x1f << size))
5957 {
5958 inst.error = _("Invalid offset");
5959 return;
5960 }
5961 inst.instruction |= (offset >> size) << 6;
5962 }
5963 else
5964 inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET;
5965 }
5966 else
5967 {
5968 /* Register offset. */
5969 if (size == THUMB_WORD)
5970 inst.instruction = (load_store == THUMB_LOAD
5971 ? T_OPCODE_LDR_RW : T_OPCODE_STR_RW);
5972 else if (size == THUMB_HALFWORD)
5973 inst.instruction = (load_store == THUMB_LOAD
5974 ? T_OPCODE_LDR_RH : T_OPCODE_STR_RH);
5975 else
5976 inst.instruction = (load_store == THUMB_LOAD
5977 ? T_OPCODE_LDR_RB : T_OPCODE_STR_RB);
5978
5979 inst.instruction |= Rd | (Rb << 3) | (Ro << 6);
5980 }
5981
5982 end_of_line (str);
5983 }
5984
5985 static void
5986 do_t_nop (str)
5987 char * str;
5988 {
5989 /* Do nothing. */
5990 end_of_line (str);
5991 return;
5992 }
5993
5994 /* Handle the Format 4 instructions that do not have equivalents in other
5995 formats. That is, ADC, AND, EOR, SBC, ROR, TST, NEG, CMN, ORR, MUL,
5996 BIC and MVN. */
5997
5998 static void
5999 do_t_arit (str)
6000 char * str;
6001 {
6002 int Rd, Rs, Rn;
6003
6004 skip_whitespace (str);
6005
6006 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6007 || skip_past_comma (&str) == FAIL
6008 || (Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
6009 {
6010 inst.error = BAD_ARGS;
6011 return;
6012 }
6013
6014 if (skip_past_comma (&str) != FAIL)
6015 {
6016 /* Three operand format not allowed for TST, CMN, NEG and MVN.
6017 (It isn't allowed for CMP either, but that isn't handled by this
6018 function.) */
6019 if (inst.instruction == T_OPCODE_TST
6020 || inst.instruction == T_OPCODE_CMN
6021 || inst.instruction == T_OPCODE_NEG
6022 || inst.instruction == T_OPCODE_MVN)
6023 {
6024 inst.error = BAD_ARGS;
6025 return;
6026 }
6027
6028 if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
6029 return;
6030
6031 if (Rs != Rd)
6032 {
6033 inst.error = _("dest and source1 must be the same register");
6034 return;
6035 }
6036 Rs = Rn;
6037 }
6038
6039 if (inst.instruction == T_OPCODE_MUL
6040 && Rs == Rd)
6041 as_tsktsk (_("Rs and Rd must be different in MUL"));
6042
6043 inst.instruction |= Rd | (Rs << 3);
6044 end_of_line (str);
6045 }
6046
6047 static void
6048 do_t_add (str)
6049 char * str;
6050 {
6051 thumb_add_sub (str, 0);
6052 }
6053
6054 static void
6055 do_t_asr (str)
6056 char * str;
6057 {
6058 thumb_shift (str, THUMB_ASR);
6059 }
6060
6061 static void
6062 do_t_branch9 (str)
6063 char * str;
6064 {
6065 if (my_get_expression (&inst.reloc.exp, &str))
6066 return;
6067 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH9;
6068 inst.reloc.pc_rel = 1;
6069 end_of_line (str);
6070 }
6071
6072 static void
6073 do_t_branch12 (str)
6074 char * str;
6075 {
6076 if (my_get_expression (&inst.reloc.exp, &str))
6077 return;
6078 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH12;
6079 inst.reloc.pc_rel = 1;
6080 end_of_line (str);
6081 }
6082
6083 /* Find the real, Thumb encoded start of a Thumb function. */
6084
6085 static symbolS *
6086 find_real_start (symbolP)
6087 symbolS * symbolP;
6088 {
6089 char * real_start;
6090 const char * name = S_GET_NAME (symbolP);
6091 symbolS * new_target;
6092
6093 /* This definiton must agree with the one in gcc/config/arm/thumb.c. */
6094 #define STUB_NAME ".real_start_of"
6095
6096 if (name == NULL)
6097 abort ();
6098
6099 /* Names that start with '.' are local labels, not function entry points.
6100 The compiler may generate BL instructions to these labels because it
6101 needs to perform a branch to a far away location. */
6102 if (name[0] == '.')
6103 return symbolP;
6104
6105 real_start = malloc (strlen (name) + strlen (STUB_NAME) + 1);
6106 sprintf (real_start, "%s%s", STUB_NAME, name);
6107
6108 new_target = symbol_find (real_start);
6109
6110 if (new_target == NULL)
6111 {
6112 as_warn ("Failed to find real start of function: %s\n", name);
6113 new_target = symbolP;
6114 }
6115
6116 free (real_start);
6117
6118 return new_target;
6119 }
6120
6121 static void
6122 do_t_branch23 (str)
6123 char * str;
6124 {
6125 if (my_get_expression (& inst.reloc.exp, & str))
6126 return;
6127
6128 inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH23;
6129 inst.reloc.pc_rel = 1;
6130 end_of_line (str);
6131
6132 /* If the destination of the branch is a defined symbol which does not have
6133 the THUMB_FUNC attribute, then we must be calling a function which has
6134 the (interfacearm) attribute. We look for the Thumb entry point to that
6135 function and change the branch to refer to that function instead. */
6136 if ( inst.reloc.exp.X_op == O_symbol
6137 && inst.reloc.exp.X_add_symbol != NULL
6138 && S_IS_DEFINED (inst.reloc.exp.X_add_symbol)
6139 && ! THUMB_IS_FUNC (inst.reloc.exp.X_add_symbol))
6140 inst.reloc.exp.X_add_symbol =
6141 find_real_start (inst.reloc.exp.X_add_symbol);
6142 }
6143
6144 static void
6145 do_t_bx (str)
6146 char * str;
6147 {
6148 int reg;
6149
6150 skip_whitespace (str);
6151
6152 if ((reg = thumb_reg (&str, THUMB_REG_ANY)) == FAIL)
6153 return;
6154
6155 /* This sets THUMB_H2 from the top bit of reg. */
6156 inst.instruction |= reg << 3;
6157
6158 /* ??? FIXME: Should add a hacky reloc here if reg is REG_PC. The reloc
6159 should cause the alignment to be checked once it is known. This is
6160 because BX PC only works if the instruction is word aligned. */
6161
6162 end_of_line (str);
6163 }
6164
6165 static void
6166 do_t_compare (str)
6167 char * str;
6168 {
6169 thumb_mov_compare (str, THUMB_COMPARE);
6170 }
6171
6172 static void
6173 do_t_ldmstm (str)
6174 char * str;
6175 {
6176 int Rb;
6177 long range;
6178
6179 skip_whitespace (str);
6180
6181 if ((Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL)
6182 return;
6183
6184 if (*str != '!')
6185 as_warn (_("Inserted missing '!': load/store multiple always writes back base register"));
6186 else
6187 str++;
6188
6189 if (skip_past_comma (&str) == FAIL
6190 || (range = reg_list (&str)) == FAIL)
6191 {
6192 if (! inst.error)
6193 inst.error = BAD_ARGS;
6194 return;
6195 }
6196
6197 if (inst.reloc.type != BFD_RELOC_NONE)
6198 {
6199 /* This really doesn't seem worth it. */
6200 inst.reloc.type = BFD_RELOC_NONE;
6201 inst.error = _("Expression too complex");
6202 return;
6203 }
6204
6205 if (range & ~0xff)
6206 {
6207 inst.error = _("only lo-regs valid in load/store multiple");
6208 return;
6209 }
6210
6211 inst.instruction |= (Rb << 8) | range;
6212 end_of_line (str);
6213 }
6214
6215 static void
6216 do_t_ldr (str)
6217 char * str;
6218 {
6219 thumb_load_store (str, THUMB_LOAD, THUMB_WORD);
6220 }
6221
6222 static void
6223 do_t_ldrb (str)
6224 char * str;
6225 {
6226 thumb_load_store (str, THUMB_LOAD, THUMB_BYTE);
6227 }
6228
6229 static void
6230 do_t_ldrh (str)
6231 char * str;
6232 {
6233 thumb_load_store (str, THUMB_LOAD, THUMB_HALFWORD);
6234 }
6235
6236 static void
6237 do_t_lds (str)
6238 char * str;
6239 {
6240 int Rd, Rb, Ro;
6241
6242 skip_whitespace (str);
6243
6244 if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6245 || skip_past_comma (&str) == FAIL
6246 || *str++ != '['
6247 || (Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6248 || skip_past_comma (&str) == FAIL
6249 || (Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL
6250 || *str++ != ']')
6251 {
6252 if (! inst.error)
6253 inst.error = _("Syntax: ldrs[b] Rd, [Rb, Ro]");
6254 return;
6255 }
6256
6257 inst.instruction |= Rd | (Rb << 3) | (Ro << 6);
6258 end_of_line (str);
6259 }
6260
6261 static void
6262 do_t_lsl (str)
6263 char * str;
6264 {
6265 thumb_shift (str, THUMB_LSL);
6266 }
6267
6268 static void
6269 do_t_lsr (str)
6270 char * str;
6271 {
6272 thumb_shift (str, THUMB_LSR);
6273 }
6274
6275 static void
6276 do_t_mov (str)
6277 char * str;
6278 {
6279 thumb_mov_compare (str, THUMB_MOVE);
6280 }
6281
6282 static void
6283 do_t_push_pop (str)
6284 char * str;
6285 {
6286 long range;
6287
6288 skip_whitespace (str);
6289
6290 if ((range = reg_list (&str)) == FAIL)
6291 {
6292 if (! inst.error)
6293 inst.error = BAD_ARGS;
6294 return;
6295 }
6296
6297 if (inst.reloc.type != BFD_RELOC_NONE)
6298 {
6299 /* This really doesn't seem worth it. */
6300 inst.reloc.type = BFD_RELOC_NONE;
6301 inst.error = _("Expression too complex");
6302 return;
6303 }
6304
6305 if (range & ~0xff)
6306 {
6307 if ((inst.instruction == T_OPCODE_PUSH
6308 && (range & ~0xff) == 1 << REG_LR)
6309 || (inst.instruction == T_OPCODE_POP
6310 && (range & ~0xff) == 1 << REG_PC))
6311 {
6312 inst.instruction |= THUMB_PP_PC_LR;
6313 range &= 0xff;
6314 }
6315 else
6316 {
6317 inst.error = _("invalid register list to push/pop instruction");
6318 return;
6319 }
6320 }
6321
6322 inst.instruction |= range;
6323 end_of_line (str);
6324 }
6325
6326 static void
6327 do_t_str (str)
6328 char * str;
6329 {
6330 thumb_load_store (str, THUMB_STORE, THUMB_WORD);
6331 }
6332
6333 static void
6334 do_t_strb (str)
6335 char * str;
6336 {
6337 thumb_load_store (str, THUMB_STORE, THUMB_BYTE);
6338 }
6339
6340 static void
6341 do_t_strh (str)
6342 char * str;
6343 {
6344 thumb_load_store (str, THUMB_STORE, THUMB_HALFWORD);
6345 }
6346
6347 static void
6348 do_t_sub (str)
6349 char * str;
6350 {
6351 thumb_add_sub (str, 1);
6352 }
6353
6354 static void
6355 do_t_swi (str)
6356 char * str;
6357 {
6358 skip_whitespace (str);
6359
6360 if (my_get_expression (&inst.reloc.exp, &str))
6361 return;
6362
6363 inst.reloc.type = BFD_RELOC_ARM_SWI;
6364 end_of_line (str);
6365 return;
6366 }
6367
6368 static void
6369 do_t_adr (str)
6370 char * str;
6371 {
6372 int reg;
6373
6374 /* This is a pseudo-op of the form "adr rd, label" to be converted
6375 into a relative address of the form "add rd, pc, #label-.-4". */
6376 skip_whitespace (str);
6377
6378 /* Store Rd in temporary location inside instruction. */
6379 if ((reg = reg_required_here (&str, 4)) == FAIL
6380 || (reg > 7) /* For Thumb reg must be r0..r7. */
6381 || skip_past_comma (&str) == FAIL
6382 || my_get_expression (&inst.reloc.exp, &str))
6383 {
6384 if (!inst.error)
6385 inst.error = BAD_ARGS;
6386 return;
6387 }
6388
6389 inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD;
6390 inst.reloc.exp.X_add_number -= 4; /* PC relative adjust. */
6391 inst.reloc.pc_rel = 1;
6392 inst.instruction |= REG_PC; /* Rd is already placed into the instruction. */
6393
6394 end_of_line (str);
6395 }
6396
6397 static void
6398 insert_reg (entry)
6399 int entry;
6400 {
6401 int len = strlen (reg_table[entry].name) + 2;
6402 char * buf = (char *) xmalloc (len);
6403 char * buf2 = (char *) xmalloc (len);
6404 int i = 0;
6405
6406 #ifdef REGISTER_PREFIX
6407 buf[i++] = REGISTER_PREFIX;
6408 #endif
6409
6410 strcpy (buf + i, reg_table[entry].name);
6411
6412 for (i = 0; buf[i]; i++)
6413 buf2[i] = islower (buf[i]) ? toupper (buf[i]) : buf[i];
6414
6415 buf2[i] = '\0';
6416
6417 hash_insert (arm_reg_hsh, buf, (PTR) & reg_table[entry]);
6418 hash_insert (arm_reg_hsh, buf2, (PTR) & reg_table[entry]);
6419 }
6420
6421 static void
6422 insert_reg_alias (str, regnum)
6423 char *str;
6424 int regnum;
6425 {
6426 struct reg_entry *new =
6427 (struct reg_entry *) xmalloc (sizeof (struct reg_entry));
6428 char *name = xmalloc (strlen (str) + 1);
6429 strcpy (name, str);
6430
6431 new->name = name;
6432 new->number = regnum;
6433
6434 hash_insert (arm_reg_hsh, name, (PTR) new);
6435 }
6436
6437 static void
6438 set_constant_flonums ()
6439 {
6440 int i;
6441
6442 for (i = 0; i < NUM_FLOAT_VALS; i++)
6443 if (atof_ieee ((char *) fp_const[i], 'x', fp_values[i]) == NULL)
6444 abort ();
6445 }
6446
6447 void
6448 md_begin ()
6449 {
6450 unsigned mach;
6451 unsigned int i;
6452
6453 if ( (arm_ops_hsh = hash_new ()) == NULL
6454 || (arm_tops_hsh = hash_new ()) == NULL
6455 || (arm_cond_hsh = hash_new ()) == NULL
6456 || (arm_shift_hsh = hash_new ()) == NULL
6457 || (arm_reg_hsh = hash_new ()) == NULL
6458 || (arm_psr_hsh = hash_new ()) == NULL)
6459 as_fatal (_("Virtual memory exhausted"));
6460
6461 for (i = 0; i < sizeof (insns) / sizeof (struct asm_opcode); i++)
6462 hash_insert (arm_ops_hsh, insns[i].template, (PTR) (insns + i));
6463 for (i = 0; i < sizeof (tinsns) / sizeof (struct thumb_opcode); i++)
6464 hash_insert (arm_tops_hsh, tinsns[i].template, (PTR) (tinsns + i));
6465 for (i = 0; i < sizeof (conds) / sizeof (struct asm_cond); i++)
6466 hash_insert (arm_cond_hsh, conds[i].template, (PTR) (conds + i));
6467 for (i = 0; i < sizeof (shift_names) / sizeof (struct asm_shift_name); i++)
6468 hash_insert (arm_shift_hsh, shift_names[i].name, (PTR) (shift_names + i));
6469 for (i = 0; i < sizeof (psrs) / sizeof (struct asm_psr); i++)
6470 hash_insert (arm_psr_hsh, psrs[i].template, (PTR) (psrs + i));
6471
6472 for (i = 0; reg_table[i].name; i++)
6473 insert_reg (i);
6474
6475 set_constant_flonums ();
6476
6477 #if defined OBJ_COFF || defined OBJ_ELF
6478 {
6479 unsigned int flags = 0;
6480
6481 /* Set the flags in the private structure. */
6482 if (uses_apcs_26) flags |= F_APCS26;
6483 if (support_interwork) flags |= F_INTERWORK;
6484 if (uses_apcs_float) flags |= F_APCS_FLOAT;
6485 if (pic_code) flags |= F_PIC;
6486 if ((cpu_variant & FPU_ALL) == FPU_NONE) flags |= F_SOFT_FLOAT;
6487
6488 bfd_set_private_flags (stdoutput, flags);
6489
6490 /* We have run out flags in the COFF header to encode the
6491 status of ATPCS support, so instead we create a dummy,
6492 empty, debug section called .arm.atpcs. */
6493 if (atpcs)
6494 {
6495 asection * sec;
6496
6497 sec = bfd_make_section (stdoutput, ".arm.atpcs");
6498
6499 if (sec != NULL)
6500 {
6501 bfd_set_section_flags
6502 (stdoutput, sec, SEC_READONLY | SEC_DEBUGGING /* | SEC_HAS_CONTENTS */);
6503 bfd_set_section_size (stdoutput, sec, 0);
6504 bfd_set_section_contents (stdoutput, sec, NULL, 0, 0);
6505 }
6506 }
6507 }
6508 #endif
6509
6510 /* Record the CPU type as well. */
6511 switch (cpu_variant & ARM_CPU_MASK)
6512 {
6513 case ARM_2:
6514 mach = bfd_mach_arm_2;
6515 break;
6516
6517 case ARM_3: /* Also ARM_250. */
6518 mach = bfd_mach_arm_2a;
6519 break;
6520
6521 default:
6522 case ARM_6 | ARM_3 | ARM_2: /* Actually no CPU type defined. */
6523 mach = bfd_mach_arm_4;
6524 break;
6525
6526 case ARM_7: /* Also ARM_6. */
6527 mach = bfd_mach_arm_3;
6528 break;
6529 }
6530
6531 /* Catch special cases. */
6532 if (cpu_variant & ARM_EXT_XSCALE)
6533 mach = bfd_mach_arm_XScale;
6534 else if (cpu_variant & ARM_EXT_V5E)
6535 mach = bfd_mach_arm_5TE;
6536 else if (cpu_variant & ARM_EXT_V5)
6537 {
6538 if (cpu_variant & ARM_EXT_THUMB)
6539 mach = bfd_mach_arm_5T;
6540 else
6541 mach = bfd_mach_arm_5;
6542 }
6543 else if (cpu_variant & ARM_EXT_HALFWORD)
6544 {
6545 if (cpu_variant & ARM_EXT_THUMB)
6546 mach = bfd_mach_arm_4T;
6547 else
6548 mach = bfd_mach_arm_4;
6549 }
6550 else if (cpu_variant & ARM_EXT_LONGMUL)
6551 mach = bfd_mach_arm_3M;
6552
6553 bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach);
6554 }
6555
6556 /* Turn an integer of n bytes (in val) into a stream of bytes appropriate
6557 for use in the a.out file, and stores them in the array pointed to by buf.
6558 This knows about the endian-ness of the target machine and does
6559 THE RIGHT THING, whatever it is. Possible values for n are 1 (byte)
6560 2 (short) and 4 (long) Floating numbers are put out as a series of
6561 LITTLENUMS (shorts, here at least). */
6562
6563 void
6564 md_number_to_chars (buf, val, n)
6565 char * buf;
6566 valueT val;
6567 int n;
6568 {
6569 if (target_big_endian)
6570 number_to_chars_bigendian (buf, val, n);
6571 else
6572 number_to_chars_littleendian (buf, val, n);
6573 }
6574
6575 static valueT
6576 md_chars_to_number (buf, n)
6577 char * buf;
6578 int n;
6579 {
6580 valueT result = 0;
6581 unsigned char * where = (unsigned char *) buf;
6582
6583 if (target_big_endian)
6584 {
6585 while (n--)
6586 {
6587 result <<= 8;
6588 result |= (*where++ & 255);
6589 }
6590 }
6591 else
6592 {
6593 while (n--)
6594 {
6595 result <<= 8;
6596 result |= (where[n] & 255);
6597 }
6598 }
6599
6600 return result;
6601 }
6602
6603 /* Turn a string in input_line_pointer into a floating point constant
6604 of type TYPE, and store the appropriate bytes in *LITP. The number
6605 of LITTLENUMS emitted is stored in *SIZEP. An error message is
6606 returned, or NULL on OK.
6607
6608 Note that fp constants aren't represent in the normal way on the ARM.
6609 In big endian mode, things are as expected. However, in little endian
6610 mode fp constants are big-endian word-wise, and little-endian byte-wise
6611 within the words. For example, (double) 1.1 in big endian mode is
6612 the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is
6613 the byte sequence 99 99 f1 3f 9a 99 99 99.
6614
6615 ??? The format of 12 byte floats is uncertain according to gcc's arm.h. */
6616
6617 char *
6618 md_atof (type, litP, sizeP)
6619 char type;
6620 char * litP;
6621 int * sizeP;
6622 {
6623 int prec;
6624 LITTLENUM_TYPE words[MAX_LITTLENUMS];
6625 char *t;
6626 int i;
6627
6628 switch (type)
6629 {
6630 case 'f':
6631 case 'F':
6632 case 's':
6633 case 'S':
6634 prec = 2;
6635 break;
6636
6637 case 'd':
6638 case 'D':
6639 case 'r':
6640 case 'R':
6641 prec = 4;
6642 break;
6643
6644 case 'x':
6645 case 'X':
6646 prec = 6;
6647 break;
6648
6649 case 'p':
6650 case 'P':
6651 prec = 6;
6652 break;
6653
6654 default:
6655 *sizeP = 0;
6656 return _("Bad call to MD_ATOF()");
6657 }
6658
6659 t = atof_ieee (input_line_pointer, type, words);
6660 if (t)
6661 input_line_pointer = t;
6662 *sizeP = prec * 2;
6663
6664 if (target_big_endian)
6665 {
6666 for (i = 0; i < prec; i++)
6667 {
6668 md_number_to_chars (litP, (valueT) words[i], 2);
6669 litP += 2;
6670 }
6671 }
6672 else
6673 {
6674 /* For a 4 byte float the order of elements in `words' is 1 0. For an
6675 8 byte float the order is 1 0 3 2. */
6676 for (i = 0; i < prec; i += 2)
6677 {
6678 md_number_to_chars (litP, (valueT) words[i + 1], 2);
6679 md_number_to_chars (litP + 2, (valueT) words[i], 2);
6680 litP += 4;
6681 }
6682 }
6683
6684 return 0;
6685 }
6686
6687 /* The knowledge of the PC's pipeline offset is built into the insns
6688 themselves. */
6689
6690 long
6691 md_pcrel_from (fixP)
6692 fixS * fixP;
6693 {
6694 if (fixP->fx_addsy
6695 && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section
6696 && fixP->fx_subsy == NULL)
6697 return 0;
6698
6699 if (fixP->fx_pcrel && (fixP->fx_r_type == BFD_RELOC_ARM_THUMB_ADD))
6700 {
6701 /* PC relative addressing on the Thumb is slightly odd
6702 as the bottom two bits of the PC are forced to zero
6703 for the calculation. */
6704 return (fixP->fx_where + fixP->fx_frag->fr_address) & ~3;
6705 }
6706
6707 #ifdef TE_WINCE
6708 /* The pattern was adjusted to accomodate CE's off-by-one fixups,
6709 so we un-adjust here to compensate for the accomodation. */
6710 return fixP->fx_where + fixP->fx_frag->fr_address + 8;
6711 #else
6712 return fixP->fx_where + fixP->fx_frag->fr_address;
6713 #endif
6714 }
6715
6716 /* Round up a section size to the appropriate boundary. */
6717
6718 valueT
6719 md_section_align (segment, size)
6720 segT segment ATTRIBUTE_UNUSED;
6721 valueT size;
6722 {
6723 #ifdef OBJ_ELF
6724 return size;
6725 #else
6726 /* Round all sects to multiple of 4. */
6727 return (size + 3) & ~3;
6728 #endif
6729 }
6730
6731 /* Under ELF we need to default _GLOBAL_OFFSET_TABLE.
6732 Otherwise we have no need to default values of symbols. */
6733
6734 symbolS *
6735 md_undefined_symbol (name)
6736 char * name ATTRIBUTE_UNUSED;
6737 {
6738 #ifdef OBJ_ELF
6739 if (name[0] == '_' && name[1] == 'G'
6740 && streq (name, GLOBAL_OFFSET_TABLE_NAME))
6741 {
6742 if (!GOT_symbol)
6743 {
6744 if (symbol_find (name))
6745 as_bad ("GOT already in the symbol table");
6746
6747 GOT_symbol = symbol_new (name, undefined_section,
6748 (valueT) 0, & zero_address_frag);
6749 }
6750
6751 return GOT_symbol;
6752 }
6753 #endif
6754
6755 return 0;
6756 }
6757
6758 /* arm_reg_parse () := if it looks like a register, return its token and
6759 advance the pointer. */
6760
6761 static int
6762 arm_reg_parse (ccp)
6763 register char ** ccp;
6764 {
6765 char * start = * ccp;
6766 char c;
6767 char * p;
6768 struct reg_entry * reg;
6769
6770 #ifdef REGISTER_PREFIX
6771 if (*start != REGISTER_PREFIX)
6772 return FAIL;
6773 p = start + 1;
6774 #else
6775 p = start;
6776 #ifdef OPTIONAL_REGISTER_PREFIX
6777 if (*p == OPTIONAL_REGISTER_PREFIX)
6778 p++, start++;
6779 #endif
6780 #endif
6781 if (!isalpha (*p) || !is_name_beginner (*p))
6782 return FAIL;
6783
6784 c = *p++;
6785 while (isalpha (c) || isdigit (c) || c == '_')
6786 c = *p++;
6787
6788 *--p = 0;
6789 reg = (struct reg_entry *) hash_find (arm_reg_hsh, start);
6790 *p = c;
6791
6792 if (reg)
6793 {
6794 *ccp = p;
6795 return reg->number;
6796 }
6797
6798 return FAIL;
6799 }
6800
6801 int
6802 md_apply_fix3 (fixP, val, seg)
6803 fixS * fixP;
6804 valueT * val;
6805 segT seg;
6806 {
6807 offsetT value = * val;
6808 offsetT newval;
6809 unsigned int newimm;
6810 unsigned long temp;
6811 int sign;
6812 char * buf = fixP->fx_where + fixP->fx_frag->fr_literal;
6813 arm_fix_data * arm_data = (arm_fix_data *) fixP->tc_fix_data;
6814
6815 assert (fixP->fx_r_type < BFD_RELOC_UNUSED);
6816
6817 /* Note whether this will delete the relocation. */
6818 #if 0
6819 /* Patch from REarnshaw to JDavis (disabled for the moment, since it
6820 doesn't work fully.) */
6821 if ((fixP->fx_addsy == 0 || symbol_constant_p (fixP->fx_addsy))
6822 && !fixP->fx_pcrel)
6823 #else
6824 if (fixP->fx_addsy == 0 && !fixP->fx_pcrel)
6825 #endif
6826 fixP->fx_done = 1;
6827
6828 /* If this symbol is in a different section then we need to leave it for
6829 the linker to deal with. Unfortunately, md_pcrel_from can't tell,
6830 so we have to undo it's effects here. */
6831 if (fixP->fx_pcrel)
6832 {
6833 if (fixP->fx_addsy != NULL
6834 && S_IS_DEFINED (fixP->fx_addsy)
6835 && S_GET_SEGMENT (fixP->fx_addsy) != seg)
6836 {
6837 if (target_oabi
6838 && (fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH
6839 || fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BLX
6840 ))
6841 value = 0;
6842 else
6843 value += md_pcrel_from (fixP);
6844 }
6845 }
6846
6847 /* Remember value for emit_reloc. */
6848 fixP->fx_addnumber = value;
6849
6850 switch (fixP->fx_r_type)
6851 {
6852 case BFD_RELOC_ARM_IMMEDIATE:
6853 newimm = validate_immediate (value);
6854 temp = md_chars_to_number (buf, INSN_SIZE);
6855
6856 /* If the instruction will fail, see if we can fix things up by
6857 changing the opcode. */
6858 if (newimm == (unsigned int) FAIL
6859 && (newimm = negate_data_op (&temp, value)) == (unsigned int) FAIL)
6860 {
6861 as_bad_where (fixP->fx_file, fixP->fx_line,
6862 _("invalid constant (%lx) after fixup"),
6863 (unsigned long) value);
6864 break;
6865 }
6866
6867 newimm |= (temp & 0xfffff000);
6868 md_number_to_chars (buf, (valueT) newimm, INSN_SIZE);
6869 break;
6870
6871 case BFD_RELOC_ARM_ADRL_IMMEDIATE:
6872 {
6873 unsigned int highpart = 0;
6874 unsigned int newinsn = 0xe1a00000; /* nop. */
6875 newimm = validate_immediate (value);
6876 temp = md_chars_to_number (buf, INSN_SIZE);
6877
6878 /* If the instruction will fail, see if we can fix things up by
6879 changing the opcode. */
6880 if (newimm == (unsigned int) FAIL
6881 && (newimm = negate_data_op (& temp, value)) == (unsigned int) FAIL)
6882 {
6883 /* No ? OK - try using two ADD instructions to generate
6884 the value. */
6885 newimm = validate_immediate_twopart (value, & highpart);
6886
6887 /* Yes - then make sure that the second instruction is
6888 also an add. */
6889 if (newimm != (unsigned int) FAIL)
6890 newinsn = temp;
6891 /* Still No ? Try using a negated value. */
6892 else if ((newimm = validate_immediate_twopart (- value, & highpart)) != (unsigned int) FAIL)
6893 temp = newinsn = (temp & OPCODE_MASK) | OPCODE_SUB << DATA_OP_SHIFT;
6894 /* Otherwise - give up. */
6895 else
6896 {
6897 as_bad_where (fixP->fx_file, fixP->fx_line,
6898 _("Unable to compute ADRL instructions for PC offset of 0x%lx"),
6899 value);
6900 break;
6901 }
6902
6903 /* Replace the first operand in the 2nd instruction (which
6904 is the PC) with the destination register. We have
6905 already added in the PC in the first instruction and we
6906 do not want to do it again. */
6907 newinsn &= ~ 0xf0000;
6908 newinsn |= ((newinsn & 0x0f000) << 4);
6909 }
6910
6911 newimm |= (temp & 0xfffff000);
6912 md_number_to_chars (buf, (valueT) newimm, INSN_SIZE);
6913
6914 highpart |= (newinsn & 0xfffff000);
6915 md_number_to_chars (buf + INSN_SIZE, (valueT) highpart, INSN_SIZE);
6916 }
6917 break;
6918
6919 case BFD_RELOC_ARM_OFFSET_IMM:
6920 sign = value >= 0;
6921
6922 if (value < 0)
6923 value = - value;
6924
6925 if (validate_offset_imm (value, 0) == FAIL)
6926 {
6927 as_bad_where (fixP->fx_file, fixP->fx_line,
6928 _("bad immediate value for offset (%ld)"),
6929 (long) value);
6930 break;
6931 }
6932
6933 newval = md_chars_to_number (buf, INSN_SIZE);
6934 newval &= 0xff7ff000;
6935 newval |= value | (sign ? INDEX_UP : 0);
6936 md_number_to_chars (buf, newval, INSN_SIZE);
6937 break;
6938
6939 case BFD_RELOC_ARM_OFFSET_IMM8:
6940 case BFD_RELOC_ARM_HWLITERAL:
6941 sign = value >= 0;
6942
6943 if (value < 0)
6944 value = - value;
6945
6946 if (validate_offset_imm (value, 1) == FAIL)
6947 {
6948 if (fixP->fx_r_type == BFD_RELOC_ARM_HWLITERAL)
6949 as_bad_where (fixP->fx_file, fixP->fx_line,
6950 _("invalid literal constant: pool needs to be closer"));
6951 else
6952 as_bad (_("bad immediate value for half-word offset (%ld)"),
6953 (long) value);
6954 break;
6955 }
6956
6957 newval = md_chars_to_number (buf, INSN_SIZE);
6958 newval &= 0xff7ff0f0;
6959 newval |= ((value >> 4) << 8) | (value & 0xf) | (sign ? INDEX_UP : 0);
6960 md_number_to_chars (buf, newval, INSN_SIZE);
6961 break;
6962
6963 case BFD_RELOC_ARM_LITERAL:
6964 sign = value >= 0;
6965
6966 if (value < 0)
6967 value = - value;
6968
6969 if (validate_offset_imm (value, 0) == FAIL)
6970 {
6971 as_bad_where (fixP->fx_file, fixP->fx_line,
6972 _("invalid literal constant: pool needs to be closer"));
6973 break;
6974 }
6975
6976 newval = md_chars_to_number (buf, INSN_SIZE);
6977 newval &= 0xff7ff000;
6978 newval |= value | (sign ? INDEX_UP : 0);
6979 md_number_to_chars (buf, newval, INSN_SIZE);
6980 break;
6981
6982 case BFD_RELOC_ARM_SHIFT_IMM:
6983 newval = md_chars_to_number (buf, INSN_SIZE);
6984 if (((unsigned long) value) > 32
6985 || (value == 32
6986 && (((newval & 0x60) == 0) || (newval & 0x60) == 0x60)))
6987 {
6988 as_bad_where (fixP->fx_file, fixP->fx_line,
6989 _("shift expression is too large"));
6990 break;
6991 }
6992
6993 if (value == 0)
6994 /* Shifts of zero must be done as lsl. */
6995 newval &= ~0x60;
6996 else if (value == 32)
6997 value = 0;
6998 newval &= 0xfffff07f;
6999 newval |= (value & 0x1f) << 7;
7000 md_number_to_chars (buf, newval, INSN_SIZE);
7001 break;
7002
7003 case BFD_RELOC_ARM_SWI:
7004 if (arm_data->thumb_mode)
7005 {
7006 if (((unsigned long) value) > 0xff)
7007 as_bad_where (fixP->fx_file, fixP->fx_line,
7008 _("Invalid swi expression"));
7009 newval = md_chars_to_number (buf, THUMB_SIZE) & 0xff00;
7010 newval |= value;
7011 md_number_to_chars (buf, newval, THUMB_SIZE);
7012 }
7013 else
7014 {
7015 if (((unsigned long) value) > 0x00ffffff)
7016 as_bad_where (fixP->fx_file, fixP->fx_line,
7017 _("Invalid swi expression"));
7018 newval = md_chars_to_number (buf, INSN_SIZE) & 0xff000000;
7019 newval |= value;
7020 md_number_to_chars (buf, newval, INSN_SIZE);
7021 }
7022 break;
7023
7024 case BFD_RELOC_ARM_MULTI:
7025 if (((unsigned long) value) > 0xffff)
7026 as_bad_where (fixP->fx_file, fixP->fx_line,
7027 _("Invalid expression in load/store multiple"));
7028 newval = value | md_chars_to_number (buf, INSN_SIZE);
7029 md_number_to_chars (buf, newval, INSN_SIZE);
7030 break;
7031
7032 case BFD_RELOC_ARM_PCREL_BRANCH:
7033 newval = md_chars_to_number (buf, INSN_SIZE);
7034
7035 /* Sign-extend a 24-bit number. */
7036 #define SEXT24(x) ((((x) & 0xffffff) ^ (~ 0x7fffff)) + 0x800000)
7037
7038 #ifdef OBJ_ELF
7039 if (! target_oabi)
7040 value = fixP->fx_offset;
7041 #endif
7042
7043 /* We are going to store value (shifted right by two) in the
7044 instruction, in a 24 bit, signed field. Thus we need to check
7045 that none of the top 8 bits of the shifted value (top 7 bits of
7046 the unshifted, unsigned value) are set, or that they are all set. */
7047 if ((value & ~ ((offsetT) 0x1ffffff)) != 0
7048 && ((value & ~ ((offsetT) 0x1ffffff)) != ~ ((offsetT) 0x1ffffff)))
7049 {
7050 #ifdef OBJ_ELF
7051 /* Normally we would be stuck at this point, since we cannot store
7052 the absolute address that is the destination of the branch in the
7053 24 bits of the branch instruction. If however, we happen to know
7054 that the destination of the branch is in the same section as the
7055 branch instruciton itself, then we can compute the relocation for
7056 ourselves and not have to bother the linker with it.
7057
7058 FIXME: The tests for OBJ_ELF and ! target_oabi are only here
7059 because I have not worked out how to do this for OBJ_COFF or
7060 target_oabi. */
7061 if (! target_oabi
7062 && fixP->fx_addsy != NULL
7063 && S_IS_DEFINED (fixP->fx_addsy)
7064 && S_GET_SEGMENT (fixP->fx_addsy) == seg)
7065 {
7066 /* Get pc relative value to go into the branch. */
7067 value = * val;
7068
7069 /* Permit a backward branch provided that enough bits
7070 are set. Allow a forwards branch, provided that
7071 enough bits are clear. */
7072 if ( (value & ~ ((offsetT) 0x1ffffff)) == ~ ((offsetT) 0x1ffffff)
7073 || (value & ~ ((offsetT) 0x1ffffff)) == 0)
7074 fixP->fx_done = 1;
7075 }
7076
7077 if (! fixP->fx_done)
7078 #endif
7079 as_bad_where (fixP->fx_file, fixP->fx_line,
7080 _("gas can't handle same-section branch dest >= 0x04000000"));
7081 }
7082
7083 value >>= 2;
7084 value += SEXT24 (newval);
7085
7086 if ( (value & ~ ((offsetT) 0xffffff)) != 0
7087 && ((value & ~ ((offsetT) 0xffffff)) != ~ ((offsetT) 0xffffff)))
7088 as_bad_where (fixP->fx_file, fixP->fx_line,
7089 _("out of range branch"));
7090
7091 newval = (value & 0x00ffffff) | (newval & 0xff000000);
7092 md_number_to_chars (buf, newval, INSN_SIZE);
7093 break;
7094
7095 case BFD_RELOC_ARM_PCREL_BLX:
7096 {
7097 offsetT hbit;
7098 newval = md_chars_to_number (buf, INSN_SIZE);
7099
7100 #ifdef OBJ_ELF
7101 if (! target_oabi)
7102 value = fixP->fx_offset;
7103 #endif
7104 hbit = (value >> 1) & 1;
7105 value = (value >> 2) & 0x00ffffff;
7106 value = (value + (newval & 0x00ffffff)) & 0x00ffffff;
7107 newval = value | (newval & 0xfe000000) | (hbit << 24);
7108 md_number_to_chars (buf, newval, INSN_SIZE);
7109 }
7110 break;
7111
7112 case BFD_RELOC_THUMB_PCREL_BRANCH9: /* Conditional branch. */
7113 newval = md_chars_to_number (buf, THUMB_SIZE);
7114 {
7115 addressT diff = (newval & 0xff) << 1;
7116 if (diff & 0x100)
7117 diff |= ~0xff;
7118
7119 value += diff;
7120 if ((value & ~0xff) && ((value & ~0xff) != ~0xff))
7121 as_bad_where (fixP->fx_file, fixP->fx_line,
7122 _("Branch out of range"));
7123 newval = (newval & 0xff00) | ((value & 0x1ff) >> 1);
7124 }
7125 md_number_to_chars (buf, newval, THUMB_SIZE);
7126 break;
7127
7128 case BFD_RELOC_THUMB_PCREL_BRANCH12: /* Unconditional branch. */
7129 newval = md_chars_to_number (buf, THUMB_SIZE);
7130 {
7131 addressT diff = (newval & 0x7ff) << 1;
7132 if (diff & 0x800)
7133 diff |= ~0x7ff;
7134
7135 value += diff;
7136 if ((value & ~0x7ff) && ((value & ~0x7ff) != ~0x7ff))
7137 as_bad_where (fixP->fx_file, fixP->fx_line,
7138 _("Branch out of range"));
7139 newval = (newval & 0xf800) | ((value & 0xfff) >> 1);
7140 }
7141 md_number_to_chars (buf, newval, THUMB_SIZE);
7142 break;
7143
7144 case BFD_RELOC_THUMB_PCREL_BLX:
7145 case BFD_RELOC_THUMB_PCREL_BRANCH23:
7146 {
7147 offsetT newval2;
7148 addressT diff;
7149
7150 newval = md_chars_to_number (buf, THUMB_SIZE);
7151 newval2 = md_chars_to_number (buf + THUMB_SIZE, THUMB_SIZE);
7152 diff = ((newval & 0x7ff) << 12) | ((newval2 & 0x7ff) << 1);
7153 if (diff & 0x400000)
7154 diff |= ~0x3fffff;
7155 #ifdef OBJ_ELF
7156 value = fixP->fx_offset;
7157 #endif
7158 value += diff;
7159 if ((value & ~0x3fffff) && ((value & ~0x3fffff) != ~0x3fffff))
7160 as_bad_where (fixP->fx_file, fixP->fx_line,
7161 _("Branch with link out of range"));
7162
7163 newval = (newval & 0xf800) | ((value & 0x7fffff) >> 12);
7164 newval2 = (newval2 & 0xf800) | ((value & 0xfff) >> 1);
7165 if (fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BLX)
7166 /* Remove bit zero of the adjusted offset. Bit zero can only be
7167 set if the upper insn is at a half-word boundary, since the
7168 destination address, an ARM instruction, must always be on a
7169 word boundary. The semantics of the BLX (1) instruction, however,
7170 are that bit zero in the offset must always be zero, and the
7171 corresponding bit one in the target address will be set from bit
7172 one of the source address. */
7173 newval2 &= ~1;
7174 md_number_to_chars (buf, newval, THUMB_SIZE);
7175 md_number_to_chars (buf + THUMB_SIZE, newval2, THUMB_SIZE);
7176 }
7177 break;
7178
7179 case BFD_RELOC_8:
7180 if (fixP->fx_done || fixP->fx_pcrel)
7181 md_number_to_chars (buf, value, 1);
7182 #ifdef OBJ_ELF
7183 else if (!target_oabi)
7184 {
7185 value = fixP->fx_offset;
7186 md_number_to_chars (buf, value, 1);
7187 }
7188 #endif
7189 break;
7190
7191 case BFD_RELOC_16:
7192 if (fixP->fx_done || fixP->fx_pcrel)
7193 md_number_to_chars (buf, value, 2);
7194 #ifdef OBJ_ELF
7195 else if (!target_oabi)
7196 {
7197 value = fixP->fx_offset;
7198 md_number_to_chars (buf, value, 2);
7199 }
7200 #endif
7201 break;
7202
7203 #ifdef OBJ_ELF
7204 case BFD_RELOC_ARM_GOT32:
7205 case BFD_RELOC_ARM_GOTOFF:
7206 md_number_to_chars (buf, 0, 4);
7207 break;
7208 #endif
7209
7210 case BFD_RELOC_RVA:
7211 case BFD_RELOC_32:
7212 if (fixP->fx_done || fixP->fx_pcrel)
7213 md_number_to_chars (buf, value, 4);
7214 #ifdef OBJ_ELF
7215 else if (!target_oabi)
7216 {
7217 value = fixP->fx_offset;
7218 md_number_to_chars (buf, value, 4);
7219 }
7220 #endif
7221 break;
7222
7223 #ifdef OBJ_ELF
7224 case BFD_RELOC_ARM_PLT32:
7225 /* It appears the instruction is fully prepared at this point. */
7226 break;
7227 #endif
7228
7229 case BFD_RELOC_ARM_GOTPC:
7230 md_number_to_chars (buf, value, 4);
7231 break;
7232
7233 case BFD_RELOC_ARM_CP_OFF_IMM:
7234 sign = value >= 0;
7235 if (value < -1023 || value > 1023 || (value & 3))
7236 as_bad_where (fixP->fx_file, fixP->fx_line,
7237 _("Illegal value for co-processor offset"));
7238 if (value < 0)
7239 value = -value;
7240 newval = md_chars_to_number (buf, INSN_SIZE) & 0xff7fff00;
7241 newval |= (value >> 2) | (sign ? INDEX_UP : 0);
7242 md_number_to_chars (buf, newval, INSN_SIZE);
7243 break;
7244
7245 case BFD_RELOC_ARM_THUMB_OFFSET:
7246 newval = md_chars_to_number (buf, THUMB_SIZE);
7247 /* Exactly what ranges, and where the offset is inserted depends
7248 on the type of instruction, we can establish this from the
7249 top 4 bits. */
7250 switch (newval >> 12)
7251 {
7252 case 4: /* PC load. */
7253 /* Thumb PC loads are somewhat odd, bit 1 of the PC is
7254 forced to zero for these loads, so we will need to round
7255 up the offset if the instruction address is not word
7256 aligned (since the final address produced must be, and
7257 we can only describe word-aligned immediate offsets). */
7258
7259 if ((fixP->fx_frag->fr_address + fixP->fx_where + value) & 3)
7260 as_bad_where (fixP->fx_file, fixP->fx_line,
7261 _("Invalid offset, target not word aligned (0x%08X)"),
7262 (unsigned int) (fixP->fx_frag->fr_address
7263 + fixP->fx_where + value));
7264
7265 if ((value + 2) & ~0x3fe)
7266 as_bad_where (fixP->fx_file, fixP->fx_line,
7267 _("Invalid offset, value too big (0x%08lX)"), value);
7268
7269 /* Round up, since pc will be rounded down. */
7270 newval |= (value + 2) >> 2;
7271 break;
7272
7273 case 9: /* SP load/store. */
7274 if (value & ~0x3fc)
7275 as_bad_where (fixP->fx_file, fixP->fx_line,
7276 _("Invalid offset, value too big (0x%08lX)"), value);
7277 newval |= value >> 2;
7278 break;
7279
7280 case 6: /* Word load/store. */
7281 if (value & ~0x7c)
7282 as_bad_where (fixP->fx_file, fixP->fx_line,
7283 _("Invalid offset, value too big (0x%08lX)"), value);
7284 newval |= value << 4; /* 6 - 2. */
7285 break;
7286
7287 case 7: /* Byte load/store. */
7288 if (value & ~0x1f)
7289 as_bad_where (fixP->fx_file, fixP->fx_line,
7290 _("Invalid offset, value too big (0x%08lX)"), value);
7291 newval |= value << 6;
7292 break;
7293
7294 case 8: /* Halfword load/store. */
7295 if (value & ~0x3e)
7296 as_bad_where (fixP->fx_file, fixP->fx_line,
7297 _("Invalid offset, value too big (0x%08lX)"), value);
7298 newval |= value << 5; /* 6 - 1. */
7299 break;
7300
7301 default:
7302 as_bad_where (fixP->fx_file, fixP->fx_line,
7303 "Unable to process relocation for thumb opcode: %lx",
7304 (unsigned long) newval);
7305 break;
7306 }
7307 md_number_to_chars (buf, newval, THUMB_SIZE);
7308 break;
7309
7310 case BFD_RELOC_ARM_THUMB_ADD:
7311 /* This is a complicated relocation, since we use it for all of
7312 the following immediate relocations:
7313
7314 3bit ADD/SUB
7315 8bit ADD/SUB
7316 9bit ADD/SUB SP word-aligned
7317 10bit ADD PC/SP word-aligned
7318
7319 The type of instruction being processed is encoded in the
7320 instruction field:
7321
7322 0x8000 SUB
7323 0x00F0 Rd
7324 0x000F Rs
7325 */
7326 newval = md_chars_to_number (buf, THUMB_SIZE);
7327 {
7328 int rd = (newval >> 4) & 0xf;
7329 int rs = newval & 0xf;
7330 int subtract = newval & 0x8000;
7331
7332 if (rd == REG_SP)
7333 {
7334 if (value & ~0x1fc)
7335 as_bad_where (fixP->fx_file, fixP->fx_line,
7336 _("Invalid immediate for stack address calculation"));
7337 newval = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST;
7338 newval |= value >> 2;
7339 }
7340 else if (rs == REG_PC || rs == REG_SP)
7341 {
7342 if (subtract ||
7343 value & ~0x3fc)
7344 as_bad_where (fixP->fx_file, fixP->fx_line,
7345 _("Invalid immediate for address calculation (value = 0x%08lX)"),
7346 (unsigned long) value);
7347 newval = (rs == REG_PC ? T_OPCODE_ADD_PC : T_OPCODE_ADD_SP);
7348 newval |= rd << 8;
7349 newval |= value >> 2;
7350 }
7351 else if (rs == rd)
7352 {
7353 if (value & ~0xff)
7354 as_bad_where (fixP->fx_file, fixP->fx_line,
7355 _("Invalid 8bit immediate"));
7356 newval = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8;
7357 newval |= (rd << 8) | value;
7358 }
7359 else
7360 {
7361 if (value & ~0x7)
7362 as_bad_where (fixP->fx_file, fixP->fx_line,
7363 _("Invalid 3bit immediate"));
7364 newval = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3;
7365 newval |= rd | (rs << 3) | (value << 6);
7366 }
7367 }
7368 md_number_to_chars (buf, newval, THUMB_SIZE);
7369 break;
7370
7371 case BFD_RELOC_ARM_THUMB_IMM:
7372 newval = md_chars_to_number (buf, THUMB_SIZE);
7373 switch (newval >> 11)
7374 {
7375 case 0x04: /* 8bit immediate MOV. */
7376 case 0x05: /* 8bit immediate CMP. */
7377 if (value < 0 || value > 255)
7378 as_bad_where (fixP->fx_file, fixP->fx_line,
7379 _("Invalid immediate: %ld is too large"),
7380 (long) value);
7381 newval |= value;
7382 break;
7383
7384 default:
7385 abort ();
7386 }
7387 md_number_to_chars (buf, newval, THUMB_SIZE);
7388 break;
7389
7390 case BFD_RELOC_ARM_THUMB_SHIFT:
7391 /* 5bit shift value (0..31). */
7392 if (value < 0 || value > 31)
7393 as_bad_where (fixP->fx_file, fixP->fx_line,
7394 _("Illegal Thumb shift value: %ld"), (long) value);
7395 newval = md_chars_to_number (buf, THUMB_SIZE) & 0xf03f;
7396 newval |= value << 6;
7397 md_number_to_chars (buf, newval, THUMB_SIZE);
7398 break;
7399
7400 case BFD_RELOC_VTABLE_INHERIT:
7401 case BFD_RELOC_VTABLE_ENTRY:
7402 fixP->fx_done = 0;
7403 return 1;
7404
7405 case BFD_RELOC_NONE:
7406 default:
7407 as_bad_where (fixP->fx_file, fixP->fx_line,
7408 _("Bad relocation fixup type (%d)"), fixP->fx_r_type);
7409 }
7410
7411 return 1;
7412 }
7413
7414 /* Translate internal representation of relocation info to BFD target
7415 format. */
7416
7417 arelent *
7418 tc_gen_reloc (section, fixp)
7419 asection * section ATTRIBUTE_UNUSED;
7420 fixS * fixp;
7421 {
7422 arelent * reloc;
7423 bfd_reloc_code_real_type code;
7424
7425 reloc = (arelent *) xmalloc (sizeof (arelent));
7426
7427 reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
7428 *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
7429 reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
7430
7431 /* @@ Why fx_addnumber sometimes and fx_offset other times? */
7432 #ifndef OBJ_ELF
7433 if (fixp->fx_pcrel == 0)
7434 reloc->addend = fixp->fx_offset;
7435 else
7436 reloc->addend = fixp->fx_offset = reloc->address;
7437 #else /* OBJ_ELF */
7438 reloc->addend = fixp->fx_offset;
7439 #endif
7440
7441 switch (fixp->fx_r_type)
7442 {
7443 case BFD_RELOC_8:
7444 if (fixp->fx_pcrel)
7445 {
7446 code = BFD_RELOC_8_PCREL;
7447 break;
7448 }
7449
7450 case BFD_RELOC_16:
7451 if (fixp->fx_pcrel)
7452 {
7453 code = BFD_RELOC_16_PCREL;
7454 break;
7455 }
7456
7457 case BFD_RELOC_32:
7458 if (fixp->fx_pcrel)
7459 {
7460 code = BFD_RELOC_32_PCREL;
7461 break;
7462 }
7463
7464 case BFD_RELOC_ARM_PCREL_BRANCH:
7465 case BFD_RELOC_ARM_PCREL_BLX:
7466 case BFD_RELOC_RVA:
7467 case BFD_RELOC_THUMB_PCREL_BRANCH9:
7468 case BFD_RELOC_THUMB_PCREL_BRANCH12:
7469 case BFD_RELOC_THUMB_PCREL_BRANCH23:
7470 case BFD_RELOC_THUMB_PCREL_BLX:
7471 case BFD_RELOC_VTABLE_ENTRY:
7472 case BFD_RELOC_VTABLE_INHERIT:
7473 code = fixp->fx_r_type;
7474 break;
7475
7476 case BFD_RELOC_ARM_LITERAL:
7477 case BFD_RELOC_ARM_HWLITERAL:
7478 /* If this is called then the a literal has been referenced across
7479 a section boundary - possibly due to an implicit dump. */
7480 as_bad_where (fixp->fx_file, fixp->fx_line,
7481 _("Literal referenced across section boundary (Implicit dump?)"));
7482 return NULL;
7483
7484 #ifdef OBJ_ELF
7485 case BFD_RELOC_ARM_GOT32:
7486 case BFD_RELOC_ARM_GOTOFF:
7487 case BFD_RELOC_ARM_PLT32:
7488 code = fixp->fx_r_type;
7489 break;
7490 #endif
7491
7492 case BFD_RELOC_ARM_IMMEDIATE:
7493 as_bad_where (fixp->fx_file, fixp->fx_line,
7494 _("Internal_relocation (type %d) not fixed up (IMMEDIATE)"),
7495 fixp->fx_r_type);
7496 return NULL;
7497
7498 case BFD_RELOC_ARM_ADRL_IMMEDIATE:
7499 as_bad_where (fixp->fx_file, fixp->fx_line,
7500 _("ADRL used for a symbol not defined in the same file"));
7501 return NULL;
7502
7503 case BFD_RELOC_ARM_OFFSET_IMM:
7504 as_bad_where (fixp->fx_file, fixp->fx_line,
7505 _("Internal_relocation (type %d) not fixed up (OFFSET_IMM)"),
7506 fixp->fx_r_type);
7507 return NULL;
7508
7509 default:
7510 {
7511 char * type;
7512
7513 switch (fixp->fx_r_type)
7514 {
7515 case BFD_RELOC_ARM_IMMEDIATE: type = "IMMEDIATE"; break;
7516 case BFD_RELOC_ARM_OFFSET_IMM: type = "OFFSET_IMM"; break;
7517 case BFD_RELOC_ARM_OFFSET_IMM8: type = "OFFSET_IMM8"; break;
7518 case BFD_RELOC_ARM_SHIFT_IMM: type = "SHIFT_IMM"; break;
7519 case BFD_RELOC_ARM_SWI: type = "SWI"; break;
7520 case BFD_RELOC_ARM_MULTI: type = "MULTI"; break;
7521 case BFD_RELOC_ARM_CP_OFF_IMM: type = "CP_OFF_IMM"; break;
7522 case BFD_RELOC_ARM_THUMB_ADD: type = "THUMB_ADD"; break;
7523 case BFD_RELOC_ARM_THUMB_SHIFT: type = "THUMB_SHIFT"; break;
7524 case BFD_RELOC_ARM_THUMB_IMM: type = "THUMB_IMM"; break;
7525 case BFD_RELOC_ARM_THUMB_OFFSET: type = "THUMB_OFFSET"; break;
7526 default: type = _("<unknown>"); break;
7527 }
7528 as_bad_where (fixp->fx_file, fixp->fx_line,
7529 _("Cannot represent %s relocation in this object file format"),
7530 type);
7531 return NULL;
7532 }
7533 }
7534
7535 #ifdef OBJ_ELF
7536 if (code == BFD_RELOC_32_PCREL
7537 && GOT_symbol
7538 && fixp->fx_addsy == GOT_symbol)
7539 {
7540 code = BFD_RELOC_ARM_GOTPC;
7541 reloc->addend = fixp->fx_offset = reloc->address;
7542 }
7543 #endif
7544
7545 reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
7546
7547 if (reloc->howto == NULL)
7548 {
7549 as_bad_where (fixp->fx_file, fixp->fx_line,
7550 _("Can not represent %s relocation in this object file format"),
7551 bfd_get_reloc_code_name (code));
7552 return NULL;
7553 }
7554
7555 /* HACK: Since arm ELF uses Rel instead of Rela, encode the
7556 vtable entry to be used in the relocation's section offset. */
7557 if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
7558 reloc->address = fixp->fx_offset;
7559
7560 return reloc;
7561 }
7562
7563 int
7564 md_estimate_size_before_relax (fragP, segtype)
7565 fragS * fragP ATTRIBUTE_UNUSED;
7566 segT segtype ATTRIBUTE_UNUSED;
7567 {
7568 as_fatal (_("md_estimate_size_before_relax\n"));
7569 return 1;
7570 }
7571
7572 static void
7573 output_inst PARAMS ((void))
7574 {
7575 char * to = NULL;
7576
7577 if (inst.error)
7578 {
7579 as_bad (inst.error);
7580 return;
7581 }
7582
7583 to = frag_more (inst.size);
7584
7585 if (thumb_mode && (inst.size > THUMB_SIZE))
7586 {
7587 assert (inst.size == (2 * THUMB_SIZE));
7588 md_number_to_chars (to, inst.instruction >> 16, THUMB_SIZE);
7589 md_number_to_chars (to + THUMB_SIZE, inst.instruction, THUMB_SIZE);
7590 }
7591 else if (inst.size > INSN_SIZE)
7592 {
7593 assert (inst.size == (2 * INSN_SIZE));
7594 md_number_to_chars (to, inst.instruction, INSN_SIZE);
7595 md_number_to_chars (to + INSN_SIZE, inst.instruction, INSN_SIZE);
7596 }
7597 else
7598 md_number_to_chars (to, inst.instruction, inst.size);
7599
7600 if (inst.reloc.type != BFD_RELOC_NONE)
7601 fix_new_arm (frag_now, to - frag_now->fr_literal,
7602 inst.size, & inst.reloc.exp, inst.reloc.pc_rel,
7603 inst.reloc.type);
7604
7605 #ifdef OBJ_ELF
7606 dwarf2_emit_insn (inst.size);
7607 #endif
7608 }
7609
7610 void
7611 md_assemble (str)
7612 char * str;
7613 {
7614 char c;
7615 char * p;
7616 char * q;
7617 char * start;
7618
7619 /* Align the instruction.
7620 This may not be the right thing to do but ... */
7621 #if 0
7622 arm_align (2, 0);
7623 #endif
7624 listing_prev_line (); /* Defined in listing.h. */
7625
7626 /* Align the previous label if needed. */
7627 if (last_label_seen != NULL)
7628 {
7629 symbol_set_frag (last_label_seen, frag_now);
7630 S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ());
7631 S_SET_SEGMENT (last_label_seen, now_seg);
7632 }
7633
7634 memset (&inst, '\0', sizeof (inst));
7635 inst.reloc.type = BFD_RELOC_NONE;
7636
7637 skip_whitespace (str);
7638
7639 /* Scan up to the end of the op-code, which must end in white space or
7640 end of string. */
7641 for (start = p = str; *p != '\0'; p++)
7642 if (*p == ' ')
7643 break;
7644
7645 if (p == str)
7646 {
7647 as_bad (_("No operator -- statement `%s'\n"), str);
7648 return;
7649 }
7650
7651 if (thumb_mode)
7652 {
7653 CONST struct thumb_opcode * opcode;
7654
7655 c = *p;
7656 *p = '\0';
7657 opcode = (CONST struct thumb_opcode *) hash_find (arm_tops_hsh, str);
7658 *p = c;
7659
7660 if (opcode)
7661 {
7662 /* Check that this instruction is supported for this CPU. */
7663 if (thumb_mode == 1 && (opcode->variants & cpu_variant) == 0)
7664 {
7665 as_bad (_("selected processor does not support this opcode"));
7666 return;
7667 }
7668
7669 inst.instruction = opcode->value;
7670 inst.size = opcode->size;
7671 (*opcode->parms) (p);
7672 output_inst ();
7673 return;
7674 }
7675 }
7676 else
7677 {
7678 CONST struct asm_opcode * opcode;
7679 unsigned long cond_code;
7680
7681 inst.size = INSN_SIZE;
7682 /* P now points to the end of the opcode, probably white space, but we
7683 have to break the opcode up in case it contains condionals and flags;
7684 keep trying with progressively smaller basic instructions until one
7685 matches, or we run out of opcode. */
7686 q = (p - str > LONGEST_INST) ? str + LONGEST_INST : p;
7687
7688 for (; q != str; q--)
7689 {
7690 c = *q;
7691 *q = '\0';
7692
7693 opcode = (CONST struct asm_opcode *) hash_find (arm_ops_hsh, str);
7694 *q = c;
7695
7696 if (opcode && opcode->template)
7697 {
7698 unsigned long flag_bits = 0;
7699 char * r;
7700
7701 /* Check that this instruction is supported for this CPU. */
7702 if ((opcode->variants & cpu_variant) == 0)
7703 goto try_shorter;
7704
7705 inst.instruction = opcode->value;
7706 if (q == p) /* Just a simple opcode. */
7707 {
7708 if (opcode->comp_suffix)
7709 {
7710 if (*opcode->comp_suffix != '\0')
7711 as_bad (_("Opcode `%s' must have suffix from list: <%s>"),
7712 str, opcode->comp_suffix);
7713 else
7714 /* Not a conditional instruction. */
7715 (*opcode->parms) (q, 0);
7716 }
7717 else
7718 {
7719 /* A conditional instruction with default condition. */
7720 inst.instruction |= COND_ALWAYS;
7721 (*opcode->parms) (q, 0);
7722 }
7723 output_inst ();
7724 return;
7725 }
7726
7727 /* Not just a simple opcode. Check if extra is a
7728 conditional. */
7729 r = q;
7730 if (p - r >= 2)
7731 {
7732 CONST struct asm_cond *cond;
7733 char d = *(r + 2);
7734
7735 *(r + 2) = '\0';
7736 cond = (CONST struct asm_cond *) hash_find (arm_cond_hsh, r);
7737 *(r + 2) = d;
7738 if (cond)
7739 {
7740 if (cond->value == 0xf0000000)
7741 as_tsktsk (
7742 _("Warning: Use of the 'nv' conditional is deprecated\n"));
7743
7744 cond_code = cond->value;
7745 r += 2;
7746 }
7747 else
7748 cond_code = COND_ALWAYS;
7749 }
7750 else
7751 cond_code = COND_ALWAYS;
7752
7753 /* Apply the conditional, or complain it's not allowed. */
7754 if (opcode->comp_suffix && *opcode->comp_suffix == '\0')
7755 {
7756 /* Instruction isn't conditional. */
7757 if (cond_code != COND_ALWAYS)
7758 {
7759 as_bad (_("Opcode `%s' is unconditional\n"), str);
7760 return;
7761 }
7762 }
7763 else
7764 /* Instruction is conditional: set the condition into it. */
7765 inst.instruction |= cond_code;
7766
7767 /* If there is a compulsory suffix, it should come here
7768 before any optional flags. */
7769 if (opcode->comp_suffix && *opcode->comp_suffix != '\0')
7770 {
7771 CONST char *s = opcode->comp_suffix;
7772
7773 while (*s)
7774 {
7775 inst.suffix++;
7776 if (*r == *s)
7777 break;
7778 s++;
7779 }
7780
7781 if (*s == '\0')
7782 {
7783 as_bad (_("Opcode `%s' must have suffix from <%s>\n"),
7784 str, opcode->comp_suffix);
7785 return;
7786 }
7787
7788 r++;
7789 }
7790
7791 /* The remainder, if any should now be flags for the instruction;
7792 Scan these checking each one found with the opcode. */
7793 if (r != p)
7794 {
7795 char d;
7796 CONST struct asm_flg *flag = opcode->flags;
7797
7798 if (flag)
7799 {
7800 int flagno;
7801
7802 d = *p;
7803 *p = '\0';
7804
7805 for (flagno = 0; flag[flagno].template; flagno++)
7806 {
7807 if (streq (r, flag[flagno].template))
7808 {
7809 flag_bits |= flag[flagno].set_bits;
7810 break;
7811 }
7812 }
7813
7814 *p = d;
7815 if (! flag[flagno].template)
7816 goto try_shorter;
7817 }
7818 else
7819 goto try_shorter;
7820 }
7821
7822 (*opcode->parms) (p, flag_bits);
7823 output_inst ();
7824 return;
7825 }
7826
7827 try_shorter:
7828 ;
7829 }
7830 }
7831
7832 /* It wasn't an instruction, but it might be a register alias of the form
7833 alias .req reg. */
7834 q = p;
7835 skip_whitespace (q);
7836
7837 c = *p;
7838 *p = '\0';
7839
7840 if (*q && !strncmp (q, ".req ", 4))
7841 {
7842 int reg;
7843 char * copy_of_str;
7844 char * r;
7845
7846 #ifdef IGNORE_OPCODE_CASE
7847 str = original_case_string;
7848 #endif
7849 copy_of_str = str;
7850
7851 q += 4;
7852 skip_whitespace (q);
7853
7854 for (r = q; *r != '\0'; r++)
7855 if (*r == ' ')
7856 break;
7857
7858 if (r != q)
7859 {
7860 int regnum;
7861 char d = *r;
7862
7863 *r = '\0';
7864 regnum = arm_reg_parse (& q);
7865 *r = d;
7866
7867 reg = arm_reg_parse (& str);
7868
7869 if (reg == FAIL)
7870 {
7871 if (regnum != FAIL)
7872 insert_reg_alias (str, regnum);
7873 else
7874 as_warn (_("register '%s' does not exist\n"), q);
7875 }
7876 else if (regnum != FAIL)
7877 {
7878 if (reg != regnum)
7879 as_warn (_("ignoring redefinition of register alias '%s'"),
7880 copy_of_str);
7881
7882 /* Do not warn about redefinitions to the same alias. */
7883 }
7884 else
7885 as_warn (_("ignoring redefinition of register alias '%s' to non-existant register '%s'"),
7886 copy_of_str, q);
7887 }
7888 else
7889 as_warn (_("ignoring incomplete .req pseuso op"));
7890
7891 *p = c;
7892 return;
7893 }
7894
7895 *p = c;
7896 as_bad (_("bad instruction `%s'"), start);
7897 }
7898
7899 /* md_parse_option
7900 Invocation line includes a switch not recognized by the base assembler.
7901 See if it's a processor-specific option. These are:
7902 Cpu variants, the arm part is optional:
7903 -m[arm]1 Currently not supported.
7904 -m[arm]2, -m[arm]250 Arm 2 and Arm 250 processor
7905 -m[arm]3 Arm 3 processor
7906 -m[arm]6[xx], Arm 6 processors
7907 -m[arm]7[xx][t][[d]m] Arm 7 processors
7908 -m[arm]8[10] Arm 8 processors
7909 -m[arm]9[20][tdmi] Arm 9 processors
7910 -mstrongarm[110[0]] StrongARM processors
7911 -mxscale XScale processors
7912 -m[arm]v[2345[t[e]]] Arm architectures
7913 -mall All (except the ARM1)
7914 FP variants:
7915 -mfpa10, -mfpa11 FPA10 and 11 co-processor instructions
7916 -mfpe-old (No float load/store multiples)
7917 -mno-fpu Disable all floating point instructions
7918 Run-time endian selection:
7919 -EB big endian cpu
7920 -EL little endian cpu
7921 ARM Procedure Calling Standard:
7922 -mapcs-32 32 bit APCS
7923 -mapcs-26 26 bit APCS
7924 -mapcs-float Pass floats in float regs
7925 -mapcs-reentrant Position independent code
7926 -mthumb-interwork Code supports Arm/Thumb interworking
7927 -matpcs ARM/Thumb Procedure Call Standard
7928 -moabi Old ELF ABI */
7929
7930 CONST char * md_shortopts = "m:k";
7931
7932 struct option md_longopts[] =
7933 {
7934 #ifdef ARM_BI_ENDIAN
7935 #define OPTION_EB (OPTION_MD_BASE + 0)
7936 {"EB", no_argument, NULL, OPTION_EB},
7937 #define OPTION_EL (OPTION_MD_BASE + 1)
7938 {"EL", no_argument, NULL, OPTION_EL},
7939 #ifdef OBJ_ELF
7940 #define OPTION_OABI (OPTION_MD_BASE +2)
7941 {"oabi", no_argument, NULL, OPTION_OABI},
7942 #endif
7943 #endif
7944 {NULL, no_argument, NULL, 0}
7945 };
7946
7947 size_t md_longopts_size = sizeof (md_longopts);
7948
7949 int
7950 md_parse_option (c, arg)
7951 int c;
7952 char * arg;
7953 {
7954 char * str = arg;
7955
7956 switch (c)
7957 {
7958 #ifdef ARM_BI_ENDIAN
7959 case OPTION_EB:
7960 target_big_endian = 1;
7961 break;
7962 case OPTION_EL:
7963 target_big_endian = 0;
7964 break;
7965 #endif
7966
7967 case 'm':
7968 switch (*str)
7969 {
7970 case 'f':
7971 if (streq (str, "fpa10"))
7972 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA10;
7973 else if (streq (str, "fpa11"))
7974 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA11;
7975 else if (streq (str, "fpe-old"))
7976 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_CORE;
7977 else
7978 goto bad;
7979 break;
7980
7981 case 'n':
7982 if (streq (str, "no-fpu"))
7983 cpu_variant &= ~FPU_ALL;
7984 break;
7985
7986 #ifdef OBJ_ELF
7987 case 'o':
7988 if (streq (str, "oabi"))
7989 target_oabi = true;
7990 break;
7991 #endif
7992
7993 case 't':
7994 /* Limit assembler to generating only Thumb instructions: */
7995 if (streq (str, "thumb"))
7996 {
7997 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_EXT_THUMB;
7998 cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_NONE;
7999 thumb_mode = 1;
8000 }
8001 else if (streq (str, "thumb-interwork"))
8002 {
8003 if ((cpu_variant & ARM_EXT_THUMB) == 0)
8004 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V4T;
8005 #if defined OBJ_COFF || defined OBJ_ELF
8006 support_interwork = true;
8007 #endif
8008 }
8009 else
8010 goto bad;
8011 break;
8012
8013 default:
8014 if (streq (str, "all"))
8015 {
8016 cpu_variant = ARM_ALL | FPU_ALL;
8017 return 1;
8018 }
8019 #if defined OBJ_COFF || defined OBJ_ELF
8020 if (! strncmp (str, "apcs-", 5))
8021 {
8022 /* GCC passes on all command line options starting "-mapcs-..."
8023 to us, so we must parse them here. */
8024
8025 str += 5;
8026
8027 if (streq (str, "32"))
8028 {
8029 uses_apcs_26 = false;
8030 return 1;
8031 }
8032 else if (streq (str, "26"))
8033 {
8034 uses_apcs_26 = true;
8035 return 1;
8036 }
8037 else if (streq (str, "frame"))
8038 {
8039 /* Stack frames are being generated - does not affect
8040 linkage of code. */
8041 return 1;
8042 }
8043 else if (streq (str, "stack-check"))
8044 {
8045 /* Stack checking is being performed - does not affect
8046 linkage, but does require that the functions
8047 __rt_stkovf_split_small and __rt_stkovf_split_big be
8048 present in the final link. */
8049
8050 return 1;
8051 }
8052 else if (streq (str, "float"))
8053 {
8054 /* Floating point arguments are being passed in the floating
8055 point registers. This does affect linking, since this
8056 version of the APCS is incompatible with the version that
8057 passes floating points in the integer registers. */
8058
8059 uses_apcs_float = true;
8060 return 1;
8061 }
8062 else if (streq (str, "reentrant"))
8063 {
8064 /* Reentrant code has been generated. This does affect
8065 linking, since there is no point in linking reentrant/
8066 position independent code with absolute position code. */
8067 pic_code = true;
8068 return 1;
8069 }
8070
8071 as_bad (_("Unrecognised APCS switch -m%s"), arg);
8072 return 0;
8073 }
8074
8075 if (! strcmp (str, "atpcs"))
8076 {
8077 atpcs = true;
8078 return 1;
8079 }
8080 #endif
8081 /* Strip off optional "arm". */
8082 if (! strncmp (str, "arm", 3))
8083 str += 3;
8084
8085 switch (*str)
8086 {
8087 case '1':
8088 if (streq (str, "1"))
8089 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_1;
8090 else
8091 goto bad;
8092 break;
8093
8094 case '2':
8095 if (streq (str, "2"))
8096 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2;
8097 else if (streq (str, "250"))
8098 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_250;
8099 else
8100 goto bad;
8101 break;
8102
8103 case '3':
8104 if (streq (str, "3"))
8105 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3;
8106 else
8107 goto bad;
8108 break;
8109
8110 case '6':
8111 switch (strtol (str, NULL, 10))
8112 {
8113 case 6:
8114 case 60:
8115 case 600:
8116 case 610:
8117 case 620:
8118 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_6;
8119 break;
8120 default:
8121 goto bad;
8122 }
8123 break;
8124
8125 case '7':
8126 /* Eat the processor name. */
8127 switch (strtol (str, & str, 10))
8128 {
8129 case 7:
8130 case 70:
8131 case 700:
8132 case 710:
8133 case 720:
8134 case 7100:
8135 case 7500:
8136 break;
8137 default:
8138 goto bad;
8139 }
8140 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7;
8141 for (; *str; str++)
8142 {
8143 switch (*str)
8144 {
8145 case 't':
8146 cpu_variant |= ARM_ARCH_V4T;
8147 break;
8148
8149 case 'm':
8150 cpu_variant |= ARM_EXT_LONGMUL;
8151 break;
8152
8153 case 'f': /* fe => fp enabled cpu. */
8154 if (str[1] == 'e')
8155 ++ str;
8156 else
8157 goto bad;
8158
8159 case 'c': /* Left over from 710c processor name. */
8160 case 'd': /* Debug. */
8161 case 'i': /* Embedded ICE. */
8162 /* Included for completeness in ARM processor naming. */
8163 break;
8164
8165 default:
8166 goto bad;
8167 }
8168 }
8169 break;
8170
8171 case '8':
8172 if (streq (str, "8") || streq (str, "810"))
8173 cpu_variant = (cpu_variant & ~ARM_ANY)
8174 | ARM_8 | ARM_ARCH_V4;
8175 else
8176 goto bad;
8177 break;
8178
8179 case '9':
8180 if (streq (str, "9"))
8181 cpu_variant = (cpu_variant & ~ARM_ANY)
8182 | ARM_9 | ARM_ARCH_V4T;
8183 else if (streq (str, "920"))
8184 cpu_variant = (cpu_variant & ~ARM_ANY)
8185 | ARM_9 | ARM_ARCH_V4;
8186 else if (streq (str, "920t"))
8187 cpu_variant = (cpu_variant & ~ARM_ANY)
8188 | ARM_9 | ARM_ARCH_V4T;
8189 else if (streq (str, "9tdmi"))
8190 cpu_variant = (cpu_variant & ~ARM_ANY)
8191 | ARM_9 | ARM_ARCH_V4T;
8192 else
8193 goto bad;
8194 break;
8195
8196 case 's':
8197 if (streq (str, "strongarm")
8198 || streq (str, "strongarm110")
8199 || streq (str, "strongarm1100"))
8200 cpu_variant = (cpu_variant & ~ARM_ANY)
8201 | ARM_8 | ARM_ARCH_V4;
8202 else
8203 goto bad;
8204 break;
8205
8206 case 'x':
8207 if (streq (str, "xscale"))
8208 cpu_variant = ARM_9 | ARM_ARCH_XSCALE;
8209 else
8210 goto bad;
8211 break;
8212
8213 case 'v':
8214 /* Select variant based on architecture rather than
8215 processor. */
8216 switch (*++str)
8217 {
8218 case '2':
8219 switch (*++str)
8220 {
8221 case 'a':
8222 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3;
8223 break;
8224 case 0:
8225 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2;
8226 break;
8227 default:
8228 as_bad (_("Invalid architecture variant -m%s"), arg);
8229 break;
8230 }
8231 break;
8232
8233 case '3':
8234 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7;
8235
8236 switch (*++str)
8237 {
8238 case 'm': cpu_variant |= ARM_EXT_LONGMUL; break;
8239 case 0: break;
8240 default:
8241 as_bad (_("Invalid architecture variant -m%s"), arg);
8242 break;
8243 }
8244 break;
8245
8246 case '4':
8247 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7 | ARM_ARCH_V4;
8248
8249 switch (*++str)
8250 {
8251 case 't': cpu_variant |= ARM_EXT_THUMB; break;
8252 case 0: break;
8253 default:
8254 as_bad (_("Invalid architecture variant -m%s"), arg);
8255 break;
8256 }
8257 break;
8258
8259 case '5':
8260 cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V5;
8261 switch (*++str)
8262 {
8263 case 't': cpu_variant |= ARM_EXT_THUMB; break;
8264 case 'e': cpu_variant |= ARM_EXT_V5E; break;
8265 case 0: break;
8266 default:
8267 as_bad (_("Invalid architecture variant -m%s"), arg);
8268 break;
8269 }
8270 break;
8271
8272 default:
8273 as_bad (_("Invalid architecture variant -m%s"), arg);
8274 break;
8275 }
8276 break;
8277
8278 default:
8279 bad:
8280 as_bad (_("Invalid processor variant -m%s"), arg);
8281 return 0;
8282 }
8283 }
8284 break;
8285
8286 #if defined OBJ_ELF || defined OBJ_COFF
8287 case 'k':
8288 pic_code = 1;
8289 break;
8290 #endif
8291
8292 default:
8293 return 0;
8294 }
8295
8296 return 1;
8297 }
8298
8299 void
8300 md_show_usage (fp)
8301 FILE * fp;
8302 {
8303 fprintf (fp, _("\
8304 ARM Specific Assembler Options:\n\
8305 -m[arm][<processor name>] select processor variant\n\
8306 -m[arm]v[2|2a|3|3m|4|4t|5[t][e]] select architecture variant\n\
8307 -mthumb only allow Thumb instructions\n\
8308 -mthumb-interwork mark the assembled code as supporting interworking\n\
8309 -mall allow any instruction\n\
8310 -mfpa10, -mfpa11 select floating point architecture\n\
8311 -mfpe-old don't allow floating-point multiple instructions\n\
8312 -mno-fpu don't allow any floating-point instructions.\n\
8313 -k generate PIC code.\n"));
8314 #if defined OBJ_COFF || defined OBJ_ELF
8315 fprintf (fp, _("\
8316 -mapcs-32, -mapcs-26 specify which ARM Procedure Calling Standard to use\n\
8317 -matpcs use ARM/Thumb Procedure Calling Standard\n\
8318 -mapcs-float floating point args are passed in FP regs\n\
8319 -mapcs-reentrant the code is position independent/reentrant\n"));
8320 #endif
8321 #ifdef OBJ_ELF
8322 fprintf (fp, _("\
8323 -moabi support the old ELF ABI\n"));
8324 #endif
8325 #ifdef ARM_BI_ENDIAN
8326 fprintf (fp, _("\
8327 -EB assemble code for a big endian cpu\n\
8328 -EL assemble code for a little endian cpu\n"));
8329 #endif
8330 }
8331
8332 /* We need to be able to fix up arbitrary expressions in some statements.
8333 This is so that we can handle symbols that are an arbitrary distance from
8334 the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask),
8335 which returns part of an address in a form which will be valid for
8336 a data instruction. We do this by pushing the expression into a symbol
8337 in the expr_section, and creating a fix for that. */
8338
8339 static void
8340 fix_new_arm (frag, where, size, exp, pc_rel, reloc)
8341 fragS * frag;
8342 int where;
8343 short int size;
8344 expressionS * exp;
8345 int pc_rel;
8346 int reloc;
8347 {
8348 fixS * new_fix;
8349 arm_fix_data * arm_data;
8350
8351 switch (exp->X_op)
8352 {
8353 case O_constant:
8354 case O_symbol:
8355 case O_add:
8356 case O_subtract:
8357 new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc);
8358 break;
8359
8360 default:
8361 new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0,
8362 pc_rel, reloc);
8363 break;
8364 }
8365
8366 /* Mark whether the fix is to a THUMB instruction, or an ARM
8367 instruction. */
8368 arm_data = (arm_fix_data *) obstack_alloc (& notes, sizeof (arm_fix_data));
8369 new_fix->tc_fix_data = (PTR) arm_data;
8370 arm_data->thumb_mode = thumb_mode;
8371
8372 return;
8373 }
8374
8375 /* This fix_new is called by cons via TC_CONS_FIX_NEW. */
8376
8377 void
8378 cons_fix_new_arm (frag, where, size, exp)
8379 fragS * frag;
8380 int where;
8381 int size;
8382 expressionS * exp;
8383 {
8384 bfd_reloc_code_real_type type;
8385 int pcrel = 0;
8386
8387 /* Pick a reloc.
8388 FIXME: @@ Should look at CPU word size. */
8389 switch (size)
8390 {
8391 case 1:
8392 type = BFD_RELOC_8;
8393 break;
8394 case 2:
8395 type = BFD_RELOC_16;
8396 break;
8397 case 4:
8398 default:
8399 type = BFD_RELOC_32;
8400 break;
8401 case 8:
8402 type = BFD_RELOC_64;
8403 break;
8404 }
8405
8406 fix_new_exp (frag, where, (int) size, exp, pcrel, type);
8407 }
8408
8409 /* A good place to do this, although this was probably not intended
8410 for this kind of use. We need to dump the literal pool before
8411 references are made to a null symbol pointer. */
8412
8413 void
8414 arm_cleanup ()
8415 {
8416 if (current_poolP == NULL)
8417 return;
8418
8419 /* Put it at the end of text section. */
8420 subseg_set (text_section, 0);
8421 s_ltorg (0);
8422 listing_prev_line ();
8423 }
8424
8425 void
8426 arm_start_line_hook ()
8427 {
8428 last_label_seen = NULL;
8429 }
8430
8431 void
8432 arm_frob_label (sym)
8433 symbolS * sym;
8434 {
8435 last_label_seen = sym;
8436
8437 ARM_SET_THUMB (sym, thumb_mode);
8438
8439 #if defined OBJ_COFF || defined OBJ_ELF
8440 ARM_SET_INTERWORK (sym, support_interwork);
8441 #endif
8442
8443 /* Note - do not allow local symbols (.Lxxx) to be labeled
8444 as Thumb functions. This is because these labels, whilst
8445 they exist inside Thumb code, are not the entry points for
8446 possible ARM->Thumb calls. Also, these labels can be used
8447 as part of a computed goto or switch statement. eg gcc
8448 can generate code that looks like this:
8449
8450 ldr r2, [pc, .Laaa]
8451 lsl r3, r3, #2
8452 ldr r2, [r3, r2]
8453 mov pc, r2
8454
8455 .Lbbb: .word .Lxxx
8456 .Lccc: .word .Lyyy
8457 ..etc...
8458 .Laaa: .word Lbbb
8459
8460 The first instruction loads the address of the jump table.
8461 The second instruction converts a table index into a byte offset.
8462 The third instruction gets the jump address out of the table.
8463 The fourth instruction performs the jump.
8464
8465 If the address stored at .Laaa is that of a symbol which has the
8466 Thumb_Func bit set, then the linker will arrange for this address
8467 to have the bottom bit set, which in turn would mean that the
8468 address computation performed by the third instruction would end
8469 up with the bottom bit set. Since the ARM is capable of unaligned
8470 word loads, the instruction would then load the incorrect address
8471 out of the jump table, and chaos would ensue. */
8472 if (label_is_thumb_function_name
8473 && (S_GET_NAME (sym)[0] != '.' || S_GET_NAME (sym)[1] != 'L')
8474 && (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0)
8475 {
8476 /* When the address of a Thumb function is taken the bottom
8477 bit of that address should be set. This will allow
8478 interworking between Arm and Thumb functions to work
8479 correctly. */
8480
8481 THUMB_SET_FUNC (sym, 1);
8482
8483 label_is_thumb_function_name = false;
8484 }
8485 }
8486
8487 /* Adjust the symbol table. This marks Thumb symbols as distinct from
8488 ARM ones. */
8489
8490 void
8491 arm_adjust_symtab ()
8492 {
8493 #ifdef OBJ_COFF
8494 symbolS * sym;
8495
8496 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
8497 {
8498 if (ARM_IS_THUMB (sym))
8499 {
8500 if (THUMB_IS_FUNC (sym))
8501 {
8502 /* Mark the symbol as a Thumb function. */
8503 if ( S_GET_STORAGE_CLASS (sym) == C_STAT
8504 || S_GET_STORAGE_CLASS (sym) == C_LABEL) /* This can happen! */
8505 S_SET_STORAGE_CLASS (sym, C_THUMBSTATFUNC);
8506
8507 else if (S_GET_STORAGE_CLASS (sym) == C_EXT)
8508 S_SET_STORAGE_CLASS (sym, C_THUMBEXTFUNC);
8509 else
8510 as_bad (_("%s: unexpected function type: %d"),
8511 S_GET_NAME (sym), S_GET_STORAGE_CLASS (sym));
8512 }
8513 else switch (S_GET_STORAGE_CLASS (sym))
8514 {
8515 case C_EXT:
8516 S_SET_STORAGE_CLASS (sym, C_THUMBEXT);
8517 break;
8518 case C_STAT:
8519 S_SET_STORAGE_CLASS (sym, C_THUMBSTAT);
8520 break;
8521 case C_LABEL:
8522 S_SET_STORAGE_CLASS (sym, C_THUMBLABEL);
8523 break;
8524 default:
8525 /* Do nothing. */
8526 break;
8527 }
8528 }
8529
8530 if (ARM_IS_INTERWORK (sym))
8531 coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_flags = 0xFF;
8532 }
8533 #endif
8534 #ifdef OBJ_ELF
8535 symbolS * sym;
8536 char bind;
8537
8538 for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
8539 {
8540 if (ARM_IS_THUMB (sym))
8541 {
8542 elf_symbol_type * elf_sym;
8543
8544 elf_sym = elf_symbol (symbol_get_bfdsym (sym));
8545 bind = ELF_ST_BIND (elf_sym);
8546
8547 /* If it's a .thumb_func, declare it as so,
8548 otherwise tag label as .code 16. */
8549 if (THUMB_IS_FUNC (sym))
8550 elf_sym->internal_elf_sym.st_info =
8551 ELF_ST_INFO (bind, STT_ARM_TFUNC);
8552 else
8553 elf_sym->internal_elf_sym.st_info =
8554 ELF_ST_INFO (bind, STT_ARM_16BIT);
8555 }
8556 }
8557 #endif
8558 }
8559
8560 int
8561 arm_data_in_code ()
8562 {
8563 if (thumb_mode && ! strncmp (input_line_pointer + 1, "data:", 5))
8564 {
8565 *input_line_pointer = '/';
8566 input_line_pointer += 5;
8567 *input_line_pointer = 0;
8568 return 1;
8569 }
8570
8571 return 0;
8572 }
8573
8574 char *
8575 arm_canonicalize_symbol_name (name)
8576 char * name;
8577 {
8578 int len;
8579
8580 if (thumb_mode && (len = strlen (name)) > 5
8581 && streq (name + len - 5, "/data"))
8582 *(name + len - 5) = 0;
8583
8584 return name;
8585 }
8586
8587 boolean
8588 arm_validate_fix (fixP)
8589 fixS * fixP;
8590 {
8591 /* If the destination of the branch is a defined symbol which does not have
8592 the THUMB_FUNC attribute, then we must be calling a function which has
8593 the (interfacearm) attribute. We look for the Thumb entry point to that
8594 function and change the branch to refer to that function instead. */
8595 if (fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23
8596 && fixP->fx_addsy != NULL
8597 && S_IS_DEFINED (fixP->fx_addsy)
8598 && ! THUMB_IS_FUNC (fixP->fx_addsy))
8599 {
8600 fixP->fx_addsy = find_real_start (fixP->fx_addsy);
8601 return true;
8602 }
8603
8604 return false;
8605 }
8606
8607 #ifdef OBJ_COFF
8608 /* This is a little hack to help the gas/arm/adrl.s test. It prevents
8609 local labels from being added to the output symbol table when they
8610 are used with the ADRL pseudo op. The ADRL relocation should always
8611 be resolved before the binbary is emitted, so it is safe to say that
8612 it is adjustable. */
8613
8614 boolean
8615 arm_fix_adjustable (fixP)
8616 fixS * fixP;
8617 {
8618 if (fixP->fx_r_type == BFD_RELOC_ARM_ADRL_IMMEDIATE)
8619 return 1;
8620 return 0;
8621 }
8622 #endif
8623 #ifdef OBJ_ELF
8624 /* Relocations against Thumb function names must be left unadjusted,
8625 so that the linker can use this information to correctly set the
8626 bottom bit of their addresses. The MIPS version of this function
8627 also prevents relocations that are mips-16 specific, but I do not
8628 know why it does this.
8629
8630 FIXME:
8631 There is one other problem that ought to be addressed here, but
8632 which currently is not: Taking the address of a label (rather
8633 than a function) and then later jumping to that address. Such
8634 addresses also ought to have their bottom bit set (assuming that
8635 they reside in Thumb code), but at the moment they will not. */
8636
8637 boolean
8638 arm_fix_adjustable (fixP)
8639 fixS * fixP;
8640 {
8641 if (fixP->fx_addsy == NULL)
8642 return 1;
8643
8644 /* Prevent all adjustments to global symbols. */
8645 if (S_IS_EXTERN (fixP->fx_addsy))
8646 return 0;
8647
8648 if (S_IS_WEAK (fixP->fx_addsy))
8649 return 0;
8650
8651 if (THUMB_IS_FUNC (fixP->fx_addsy)
8652 && fixP->fx_subsy == NULL)
8653 return 0;
8654
8655 /* We need the symbol name for the VTABLE entries. */
8656 if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT
8657 || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY)
8658 return 0;
8659
8660 return 1;
8661 }
8662
8663 const char *
8664 elf32_arm_target_format ()
8665 {
8666 if (target_big_endian)
8667 {
8668 if (target_oabi)
8669 return "elf32-bigarm-oabi";
8670 else
8671 return "elf32-bigarm";
8672 }
8673 else
8674 {
8675 if (target_oabi)
8676 return "elf32-littlearm-oabi";
8677 else
8678 return "elf32-littlearm";
8679 }
8680 }
8681
8682 void
8683 armelf_frob_symbol (symp, puntp)
8684 symbolS * symp;
8685 int * puntp;
8686 {
8687 elf_frob_symbol (symp, puntp);
8688 }
8689
8690 int
8691 arm_force_relocation (fixp)
8692 struct fix * fixp;
8693 {
8694 if ( fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT
8695 || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY
8696 || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH
8697 || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BLX
8698 || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BLX
8699 || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23)
8700 return 1;
8701
8702 return 0;
8703 }
8704
8705 static bfd_reloc_code_real_type
8706 arm_parse_reloc ()
8707 {
8708 char id [16];
8709 char * ip;
8710 unsigned int i;
8711 static struct
8712 {
8713 char * str;
8714 int len;
8715 bfd_reloc_code_real_type reloc;
8716 }
8717 reloc_map[] =
8718 {
8719 #define MAP(str,reloc) { str, sizeof (str) - 1, reloc }
8720 MAP ("(got)", BFD_RELOC_ARM_GOT32),
8721 MAP ("(gotoff)", BFD_RELOC_ARM_GOTOFF),
8722 /* ScottB: Jan 30, 1998 - Added support for parsing "var(PLT)"
8723 branch instructions generated by GCC for PLT relocs. */
8724 MAP ("(plt)", BFD_RELOC_ARM_PLT32),
8725 { NULL, 0, BFD_RELOC_UNUSED }
8726 #undef MAP
8727 };
8728
8729 for (i = 0, ip = input_line_pointer;
8730 i < sizeof (id) && (isalnum (*ip) || ispunct (*ip));
8731 i++, ip++)
8732 id[i] = tolower (*ip);
8733
8734 for (i = 0; reloc_map[i].str; i++)
8735 if (strncmp (id, reloc_map[i].str, reloc_map[i].len) == 0)
8736 break;
8737
8738 input_line_pointer += reloc_map[i].len;
8739
8740 return reloc_map[i].reloc;
8741 }
8742
8743 static void
8744 s_arm_elf_cons (nbytes)
8745 int nbytes;
8746 {
8747 expressionS exp;
8748
8749 #ifdef md_flush_pending_output
8750 md_flush_pending_output ();
8751 #endif
8752
8753 if (is_it_end_of_statement ())
8754 {
8755 demand_empty_rest_of_line ();
8756 return;
8757 }
8758
8759 #ifdef md_cons_align
8760 md_cons_align (nbytes);
8761 #endif
8762
8763 do
8764 {
8765 bfd_reloc_code_real_type reloc;
8766
8767 expression (& exp);
8768
8769 if (exp.X_op == O_symbol
8770 && * input_line_pointer == '('
8771 && (reloc = arm_parse_reloc ()) != BFD_RELOC_UNUSED)
8772 {
8773 reloc_howto_type *howto = bfd_reloc_type_lookup (stdoutput, reloc);
8774 int size = bfd_get_reloc_size (howto);
8775
8776 if (size > nbytes)
8777 as_bad ("%s relocations do not fit in %d bytes",
8778 howto->name, nbytes);
8779 else
8780 {
8781 register char *p = frag_more ((int) nbytes);
8782 int offset = nbytes - size;
8783
8784 fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size,
8785 &exp, 0, reloc);
8786 }
8787 }
8788 else
8789 emit_expr (&exp, (unsigned int) nbytes);
8790 }
8791 while (*input_line_pointer++ == ',');
8792
8793 /* Put terminator back into stream. */
8794 input_line_pointer --;
8795 demand_empty_rest_of_line ();
8796 }
8797
8798 #endif /* OBJ_ELF */
8799
8800 /* This is called from HANDLE_ALIGN in write.c. Fill in the contents
8801 of an rs_align_code fragment. */
8802
8803 void
8804 arm_handle_align (fragP)
8805 fragS *fragP;
8806 {
8807 static char const arm_noop[4] = { 0x00, 0x00, 0xa0, 0xe1 };
8808 static char const thumb_noop[2] = { 0xc0, 0x46 };
8809 static char const arm_bigend_noop[4] = { 0xe1, 0xa0, 0x00, 0x00 };
8810 static char const thumb_bigend_noop[2] = { 0x46, 0xc0 };
8811
8812 int bytes, fix, noop_size;
8813 char * p;
8814 const char * noop;
8815
8816 if (fragP->fr_type != rs_align_code)
8817 return;
8818
8819 bytes = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix;
8820 p = fragP->fr_literal + fragP->fr_fix;
8821 fix = 0;
8822
8823 if (bytes > MAX_MEM_FOR_RS_ALIGN_CODE)
8824 bytes &= MAX_MEM_FOR_RS_ALIGN_CODE;
8825
8826 if (fragP->tc_frag_data)
8827 {
8828 if (target_big_endian)
8829 noop = thumb_bigend_noop;
8830 else
8831 noop = thumb_noop;
8832 noop_size = sizeof (thumb_noop);
8833 }
8834 else
8835 {
8836 if (target_big_endian)
8837 noop = arm_bigend_noop;
8838 else
8839 noop = arm_noop;
8840 noop_size = sizeof (arm_noop);
8841 }
8842
8843 if (bytes & (noop_size - 1))
8844 {
8845 fix = bytes & (noop_size - 1);
8846 memset (p, 0, fix);
8847 p += fix;
8848 bytes -= fix;
8849 }
8850
8851 while (bytes >= noop_size)
8852 {
8853 memcpy (p, noop, noop_size);
8854 p += noop_size;
8855 bytes -= noop_size;
8856 fix += noop_size;
8857 }
8858
8859 fragP->fr_fix += fix;
8860 fragP->fr_var = noop_size;
8861 }
8862
8863 /* Called from md_do_align. Used to create an alignment
8864 frag in a code section. */
8865
8866 void
8867 arm_frag_align_code (n, max)
8868 int n;
8869 int max;
8870 {
8871 char * p;
8872
8873 /* We assume that there will never be a requirment
8874 to support alignments greater than 32 bytes. */
8875 if (max > MAX_MEM_FOR_RS_ALIGN_CODE)
8876 as_fatal (_("alignments greater than 32 bytes not supported in .text sections."));
8877
8878 p = frag_var (rs_align_code,
8879 MAX_MEM_FOR_RS_ALIGN_CODE,
8880 1,
8881 (relax_substateT) max,
8882 (symbolS *) NULL,
8883 (offsetT) n,
8884 (char *) NULL);
8885 *p = 0;
8886
8887 }
8888
8889 /* Perform target specific initialisation of a frag. */
8890
8891 void
8892 arm_init_frag (fragP)
8893 fragS *fragP;
8894 {
8895 /* Record whether this frag is in an ARM or a THUMB area. */
8896 fragP->tc_frag_data = thumb_mode;
8897 }
GDB Binutils - Deliverables
This page took 0.307054 seconds and 4 git commands to generate.