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252b5132 RH |
1 | /* tc-arm.c -- Assemble for the ARM |
2 | Copyright (C) 1994, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. | |
3 | Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org) | |
4 | Modified by David Taylor (dtaylor@armltd.co.uk) | |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the Free | |
20 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
21 | 02111-1307, USA. */ | |
22 | ||
23 | #include <ctype.h> | |
24 | #include <string.h> | |
25 | #define NO_RELOC 0 | |
26 | #include "as.h" | |
27 | ||
28 | /* need TARGET_CPU */ | |
29 | #include "config.h" | |
30 | #include "subsegs.h" | |
31 | #include "obstack.h" | |
32 | #include "symbols.h" | |
33 | #include "listing.h" | |
34 | ||
35 | #ifdef OBJ_ELF | |
36 | #include "elf/arm.h" | |
37 | #endif | |
38 | ||
39 | /* Types of processor to assemble for. */ | |
40 | #define ARM_1 0x00000001 | |
41 | #define ARM_2 0x00000002 | |
42 | #define ARM_3 0x00000004 | |
43 | #define ARM_250 ARM_3 | |
44 | #define ARM_6 0x00000008 | |
45 | #define ARM_7 ARM_6 /* same core instruction set */ | |
46 | #define ARM_8 ARM_6 /* same core instruction set */ | |
47 | #define ARM_9 ARM_6 /* same core instruction set */ | |
48 | #define ARM_CPU_MASK 0x0000000f | |
49 | ||
50 | /* The following bitmasks control CPU extensions (ARM7 onwards): */ | |
51 | #define ARM_LONGMUL 0x00000010 /* allow long multiplies */ | |
52 | #define ARM_HALFWORD 0x00000020 /* allow half word loads */ | |
53 | #define ARM_THUMB 0x00000040 /* allow BX instruction */ | |
54 | ||
55 | #define ARM_ARCHv4 (ARM_7 | ARM_LONGMUL | ARM_HALFWORD) | |
56 | ||
57 | /* Some useful combinations: */ | |
58 | #define ARM_ANY 0x00ffffff | |
59 | #define ARM_2UP 0x00fffffe | |
60 | #define ARM_ALL ARM_2UP /* Not arm1 only */ | |
61 | #define ARM_3UP 0x00fffffc | |
62 | #define ARM_6UP 0x00fffff8 /* Includes ARM7 */ | |
63 | ||
64 | #define FPU_CORE 0x80000000 | |
65 | #define FPU_FPA10 0x40000000 | |
66 | #define FPU_FPA11 0x40000000 | |
67 | #define FPU_NONE 0 | |
68 | ||
69 | /* Some useful combinations */ | |
70 | #define FPU_ALL 0xff000000 /* Note this is ~ARM_ANY */ | |
71 | #define FPU_MEMMULTI 0x7f000000 /* Not fpu_core */ | |
72 | ||
73 | ||
74 | #ifndef CPU_DEFAULT | |
75 | #if defined __thumb__ | |
76 | #define CPU_DEFAULT (ARM_ARCHv4 | ARM_THUMB) | |
77 | #else | |
78 | #define CPU_DEFAULT ARM_ALL | |
79 | #endif | |
80 | #endif | |
81 | ||
82 | #ifndef FPU_DEFAULT | |
83 | #define FPU_DEFAULT FPU_ALL | |
84 | #endif | |
85 | ||
86 | #define streq(a,b) (strcmp (a, b) == 0) | |
87 | ||
88 | static unsigned long cpu_variant = CPU_DEFAULT | FPU_DEFAULT; | |
89 | static int target_oabi = 0; | |
90 | ||
91 | #if defined OBJ_COFF || defined OBJ_ELF | |
92 | /* Flags stored in private area of BFD structure */ | |
93 | static boolean uses_apcs_26 = false; | |
94 | static boolean support_interwork = false; | |
95 | static boolean uses_apcs_float = false; | |
96 | static boolean pic_code = false; | |
97 | #endif | |
98 | ||
99 | /* This array holds the chars that always start a comment. If the | |
100 | pre-processor is disabled, these aren't very useful */ | |
101 | CONST char comment_chars[] = "@"; | |
102 | ||
103 | /* This array holds the chars that only start a comment at the beginning of | |
104 | a line. If the line seems to have the form '# 123 filename' | |
105 | .line and .file directives will appear in the pre-processed output */ | |
106 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
107 | first line of the input file. This is because the compiler outputs | |
108 | #NO_APP at the beginning of its output. */ | |
109 | /* Also note that comments like this one will always work. */ | |
110 | CONST char line_comment_chars[] = "#"; | |
111 | ||
112 | #ifdef TE_LINUX | |
113 | CONST char line_separator_chars[] = ";"; | |
114 | #else | |
115 | CONST char line_separator_chars[] = ""; | |
116 | #endif | |
117 | ||
118 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
119 | CONST char EXP_CHARS[] = "eE"; | |
120 | ||
121 | /* Chars that mean this number is a floating point constant */ | |
122 | /* As in 0f12.456 */ | |
123 | /* or 0d1.2345e12 */ | |
124 | ||
125 | CONST char FLT_CHARS[] = "rRsSfFdDxXeEpP"; | |
126 | ||
127 | /* Prefix characters that indicate the start of an immediate | |
128 | value. */ | |
129 | #define is_immediate_prefix(C) ((C) == '#' || (C) == '$') | |
130 | ||
131 | #ifdef OBJ_ELF | |
132 | symbolS * GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
133 | #endif | |
134 | ||
135 | CONST int md_reloc_size = 8; /* Size of relocation record */ | |
136 | ||
137 | static int thumb_mode = 0; /* non-zero if assembling thumb instructions */ | |
138 | ||
139 | typedef struct arm_fix | |
140 | { | |
141 | int thumb_mode; | |
142 | } arm_fix_data; | |
143 | ||
144 | struct arm_it | |
145 | { | |
146 | CONST char * error; | |
147 | unsigned long instruction; | |
148 | int suffix; | |
149 | int size; | |
150 | struct | |
151 | { | |
152 | bfd_reloc_code_real_type type; | |
153 | expressionS exp; | |
154 | int pc_rel; | |
155 | } reloc; | |
156 | }; | |
157 | ||
158 | struct arm_it inst; | |
159 | ||
160 | struct asm_shift | |
161 | { | |
162 | CONST char * template; | |
163 | unsigned long value; | |
164 | }; | |
165 | ||
166 | static CONST struct asm_shift shift[] = | |
167 | { | |
168 | {"asl", 0}, | |
169 | {"lsl", 0}, | |
170 | {"lsr", 0x00000020}, | |
171 | {"asr", 0x00000040}, | |
172 | {"ror", 0x00000060}, | |
173 | {"rrx", 0x00000060}, | |
174 | {"ASL", 0}, | |
175 | {"LSL", 0}, | |
176 | {"LSR", 0x00000020}, | |
177 | {"ASR", 0x00000040}, | |
178 | {"ROR", 0x00000060}, | |
179 | {"RRX", 0x00000060} | |
180 | }; | |
181 | ||
182 | #define NO_SHIFT_RESTRICT 1 | |
183 | #define SHIFT_RESTRICT 0 | |
184 | ||
185 | #define NUM_FLOAT_VALS 8 | |
186 | ||
187 | CONST char * fp_const[] = | |
188 | { | |
189 | "0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0", 0 | |
190 | }; | |
191 | ||
192 | /* Number of littlenums required to hold an extended precision number */ | |
193 | #define MAX_LITTLENUMS 6 | |
194 | ||
195 | LITTLENUM_TYPE fp_values[NUM_FLOAT_VALS][MAX_LITTLENUMS]; | |
196 | ||
197 | #define FAIL (-1) | |
198 | #define SUCCESS (0) | |
199 | ||
200 | #define SUFF_S 1 | |
201 | #define SUFF_D 2 | |
202 | #define SUFF_E 3 | |
203 | #define SUFF_P 4 | |
204 | ||
205 | #define CP_T_X 0x00008000 | |
206 | #define CP_T_Y 0x00400000 | |
207 | #define CP_T_Pre 0x01000000 | |
208 | #define CP_T_UD 0x00800000 | |
209 | #define CP_T_WB 0x00200000 | |
210 | ||
211 | #define CONDS_BIT (0x00100000) | |
212 | #define LOAD_BIT (0x00100000) | |
213 | #define TRANS_BIT (0x00200000) | |
214 | ||
215 | struct asm_cond | |
216 | { | |
217 | CONST char * template; | |
218 | unsigned long value; | |
219 | }; | |
220 | ||
221 | /* This is to save a hash look-up in the common case */ | |
222 | #define COND_ALWAYS 0xe0000000 | |
223 | ||
224 | static CONST struct asm_cond conds[] = | |
225 | { | |
226 | {"eq", 0x00000000}, | |
227 | {"ne", 0x10000000}, | |
228 | {"cs", 0x20000000}, {"hs", 0x20000000}, | |
229 | {"cc", 0x30000000}, {"ul", 0x30000000}, {"lo", 0x30000000}, | |
230 | {"mi", 0x40000000}, | |
231 | {"pl", 0x50000000}, | |
232 | {"vs", 0x60000000}, | |
233 | {"vc", 0x70000000}, | |
234 | {"hi", 0x80000000}, | |
235 | {"ls", 0x90000000}, | |
236 | {"ge", 0xa0000000}, | |
237 | {"lt", 0xb0000000}, | |
238 | {"gt", 0xc0000000}, | |
239 | {"le", 0xd0000000}, | |
240 | {"al", 0xe0000000}, | |
241 | {"nv", 0xf0000000} | |
242 | }; | |
243 | ||
244 | /* Warning: If the top bit of the set_bits is set, then the standard | |
245 | instruction bitmask is ignored, and the new bitmask is taken from | |
246 | the set_bits: */ | |
247 | struct asm_flg | |
248 | { | |
249 | CONST char * template; /* Basic flag string */ | |
250 | unsigned long set_bits; /* Bits to set */ | |
251 | }; | |
252 | ||
253 | static CONST struct asm_flg s_flag[] = | |
254 | { | |
255 | {"s", CONDS_BIT}, | |
256 | {NULL, 0} | |
257 | }; | |
258 | ||
259 | static CONST struct asm_flg ldr_flags[] = | |
260 | { | |
261 | {"b", 0x00400000}, | |
262 | {"t", TRANS_BIT}, | |
263 | {"bt", 0x00400000 | TRANS_BIT}, | |
264 | {"h", 0x801000b0}, | |
265 | {"sh", 0x801000f0}, | |
266 | {"sb", 0x801000d0}, | |
267 | {NULL, 0} | |
268 | }; | |
269 | ||
270 | static CONST struct asm_flg str_flags[] = | |
271 | { | |
272 | {"b", 0x00400000}, | |
273 | {"t", TRANS_BIT}, | |
274 | {"bt", 0x00400000 | TRANS_BIT}, | |
275 | {"h", 0x800000b0}, | |
276 | {NULL, 0} | |
277 | }; | |
278 | ||
279 | static CONST struct asm_flg byte_flag[] = | |
280 | { | |
281 | {"b", 0x00400000}, | |
282 | {NULL, 0} | |
283 | }; | |
284 | ||
285 | static CONST struct asm_flg cmp_flags[] = | |
286 | { | |
287 | {"s", CONDS_BIT}, | |
288 | {"p", 0x0010f000}, | |
289 | {NULL, 0} | |
290 | }; | |
291 | ||
292 | static CONST struct asm_flg ldm_flags[] = | |
293 | { | |
294 | {"ed", 0x01800000}, | |
295 | {"fd", 0x00800000}, | |
296 | {"ea", 0x01000000}, | |
297 | {"fa", 0x08000000}, | |
298 | {"ib", 0x01800000}, | |
299 | {"ia", 0x00800000}, | |
300 | {"db", 0x01000000}, | |
301 | {"da", 0x08000000}, | |
302 | {NULL, 0} | |
303 | }; | |
304 | ||
305 | static CONST struct asm_flg stm_flags[] = | |
306 | { | |
307 | {"ed", 0x08000000}, | |
308 | {"fd", 0x01000000}, | |
309 | {"ea", 0x00800000}, | |
310 | {"fa", 0x01800000}, | |
311 | {"ib", 0x01800000}, | |
312 | {"ia", 0x00800000}, | |
313 | {"db", 0x01000000}, | |
314 | {"da", 0x08000000}, | |
315 | {NULL, 0} | |
316 | }; | |
317 | ||
318 | static CONST struct asm_flg lfm_flags[] = | |
319 | { | |
320 | {"fd", 0x00800000}, | |
321 | {"ea", 0x01000000}, | |
322 | {NULL, 0} | |
323 | }; | |
324 | ||
325 | static CONST struct asm_flg sfm_flags[] = | |
326 | { | |
327 | {"fd", 0x01000000}, | |
328 | {"ea", 0x00800000}, | |
329 | {NULL, 0} | |
330 | }; | |
331 | ||
332 | static CONST struct asm_flg round_flags[] = | |
333 | { | |
334 | {"p", 0x00000020}, | |
335 | {"m", 0x00000040}, | |
336 | {"z", 0x00000060}, | |
337 | {NULL, 0} | |
338 | }; | |
339 | ||
340 | /* The implementation of the FIX instruction is broken on some assemblers, | |
341 | in that it accepts a precision specifier as well as a rounding specifier, | |
342 | despite the fact that this is meaningless. To be more compatible, we | |
343 | accept it as well, though of course it does not set any bits. */ | |
344 | static CONST struct asm_flg fix_flags[] = | |
345 | { | |
346 | {"p", 0x00000020}, | |
347 | {"m", 0x00000040}, | |
348 | {"z", 0x00000060}, | |
349 | {"sp", 0x00000020}, | |
350 | {"sm", 0x00000040}, | |
351 | {"sz", 0x00000060}, | |
352 | {"dp", 0x00000020}, | |
353 | {"dm", 0x00000040}, | |
354 | {"dz", 0x00000060}, | |
355 | {"ep", 0x00000020}, | |
356 | {"em", 0x00000040}, | |
357 | {"ez", 0x00000060}, | |
358 | {NULL, 0} | |
359 | }; | |
360 | ||
361 | static CONST struct asm_flg except_flag[] = | |
362 | { | |
363 | {"e", 0x00400000}, | |
364 | {NULL, 0} | |
365 | }; | |
366 | ||
367 | static CONST struct asm_flg cplong_flag[] = | |
368 | { | |
369 | {"l", 0x00400000}, | |
370 | {NULL, 0} | |
371 | }; | |
372 | ||
373 | struct asm_psr | |
374 | { | |
375 | CONST char * template; | |
376 | unsigned long number; | |
377 | }; | |
378 | ||
379 | #define PSR_FIELD_MASK 0x000f0000 | |
380 | ||
381 | #define PSR_FLAGS 0x00080000 | |
382 | #define PSR_CONTROL 0x00010000 /* Undocumented instruction, its use is discouraged by ARM */ | |
383 | #define PSR_ALL 0x00090000 | |
384 | ||
385 | #define CPSR_ALL 0 | |
386 | #define SPSR_ALL 1 | |
387 | #define CPSR_FLG 2 | |
388 | #define SPSR_FLG 3 | |
389 | #define CPSR_CTL 4 | |
390 | #define SPSR_CTL 5 | |
391 | ||
392 | static CONST struct asm_psr psrs[] = | |
393 | { | |
394 | /* Valid <psr>'s */ | |
395 | {"cpsr", CPSR_ALL}, | |
396 | {"cpsr_all", CPSR_ALL}, | |
397 | {"spsr", SPSR_ALL}, | |
398 | {"spsr_all", SPSR_ALL}, | |
399 | ||
400 | /* Valid <psrf>'s */ | |
401 | {"cpsr_flg", CPSR_FLG}, | |
402 | {"spsr_flg", SPSR_FLG}, | |
403 | ||
404 | /* Valid <psrc>'s */ | |
405 | {"cpsr_c", CPSR_CTL}, | |
406 | {"cpsr_ctl", CPSR_CTL}, | |
407 | {"spsr_c", SPSR_CTL}, | |
408 | {"spsr_ctl", SPSR_CTL} | |
409 | }; | |
410 | ||
411 | /* Functions called by parser */ | |
412 | /* ARM instructions */ | |
413 | static void do_arit PARAMS ((char *operands, unsigned long flags)); | |
414 | static void do_cmp PARAMS ((char *operands, unsigned long flags)); | |
415 | static void do_mov PARAMS ((char *operands, unsigned long flags)); | |
416 | static void do_ldst PARAMS ((char *operands, unsigned long flags)); | |
417 | static void do_ldmstm PARAMS ((char *operands, unsigned long flags)); | |
418 | static void do_branch PARAMS ((char *operands, unsigned long flags)); | |
419 | static void do_swi PARAMS ((char *operands, unsigned long flags)); | |
420 | /* Pseudo Op codes */ | |
421 | static void do_adr PARAMS ((char *operands, unsigned long flags)); | |
422 | static void do_nop PARAMS ((char *operands, unsigned long flags)); | |
423 | /* ARM 2 */ | |
424 | static void do_mul PARAMS ((char *operands, unsigned long flags)); | |
425 | static void do_mla PARAMS ((char *operands, unsigned long flags)); | |
426 | /* ARM 3 */ | |
427 | static void do_swap PARAMS ((char *operands, unsigned long flags)); | |
428 | /* ARM 6 */ | |
429 | static void do_msr PARAMS ((char *operands, unsigned long flags)); | |
430 | static void do_mrs PARAMS ((char *operands, unsigned long flags)); | |
431 | /* ARM 7M */ | |
432 | static void do_mull PARAMS ((char *operands, unsigned long flags)); | |
433 | /* ARM THUMB */ | |
434 | static void do_bx PARAMS ((char *operands, unsigned long flags)); | |
435 | ||
436 | /* Coprocessor Instructions */ | |
437 | static void do_cdp PARAMS ((char *operands, unsigned long flags)); | |
438 | static void do_lstc PARAMS ((char *operands, unsigned long flags)); | |
439 | static void do_co_reg PARAMS ((char *operands, unsigned long flags)); | |
440 | static void do_fp_ctrl PARAMS ((char *operands, unsigned long flags)); | |
441 | static void do_fp_ldst PARAMS ((char *operands, unsigned long flags)); | |
442 | static void do_fp_ldmstm PARAMS ((char *operands, unsigned long flags)); | |
443 | static void do_fp_dyadic PARAMS ((char *operands, unsigned long flags)); | |
444 | static void do_fp_monadic PARAMS ((char *operands, unsigned long flags)); | |
445 | static void do_fp_cmp PARAMS ((char *operands, unsigned long flags)); | |
446 | static void do_fp_from_reg PARAMS ((char *operands, unsigned long flags)); | |
447 | static void do_fp_to_reg PARAMS ((char *operands, unsigned long flags)); | |
448 | ||
449 | static void fix_new_arm PARAMS ((fragS *frag, int where, | |
450 | short int size, expressionS *exp, | |
451 | int pc_rel, int reloc)); | |
452 | static int arm_reg_parse PARAMS ((char **ccp)); | |
453 | static int arm_psr_parse PARAMS ((char **ccp)); | |
454 | static void symbol_locate PARAMS ((symbolS *, CONST char *, segT, | |
455 | valueT, fragS *)); | |
456 | static int add_to_lit_pool PARAMS ((void)); | |
457 | static unsigned validate_immediate PARAMS ((unsigned)); | |
458 | static int validate_offset_imm PARAMS ((int, int)); | |
459 | static void opcode_select PARAMS ((int)); | |
460 | static void end_of_line PARAMS ((char *)); | |
461 | static int reg_required_here PARAMS ((char **, int)); | |
462 | static int psr_required_here PARAMS ((char **, int, int)); | |
463 | static int co_proc_number PARAMS ((char **)); | |
464 | static int cp_opc_expr PARAMS ((char **, int, int)); | |
465 | static int cp_reg_required_here PARAMS ((char **, int)); | |
466 | static int fp_reg_required_here PARAMS ((char **, int)); | |
467 | static int cp_address_offset PARAMS ((char **)); | |
468 | static int cp_address_required_here PARAMS ((char **)); | |
469 | static int my_get_float_expression PARAMS ((char **)); | |
470 | static int skip_past_comma PARAMS ((char **)); | |
471 | static int walk_no_bignums PARAMS ((symbolS *)); | |
472 | static int negate_data_op PARAMS ((unsigned long *, | |
473 | unsigned long)); | |
474 | static int data_op2 PARAMS ((char **)); | |
475 | static int fp_op2 PARAMS ((char **)); | |
476 | static long reg_list PARAMS ((char **)); | |
477 | static void thumb_load_store PARAMS ((char *, int, int)); | |
478 | static int decode_shift PARAMS ((char **, int)); | |
479 | static int ldst_extend PARAMS ((char **, int)); | |
480 | static void thumb_add_sub PARAMS ((char *, int)); | |
481 | static void insert_reg PARAMS ((int)); | |
482 | static void thumb_shift PARAMS ((char *, int)); | |
483 | static void thumb_mov_compare PARAMS ((char *, int)); | |
484 | static void set_constant_flonums PARAMS ((void)); | |
485 | static valueT md_chars_to_number PARAMS ((char *, int)); | |
486 | static void insert_reg_alias PARAMS ((char *, int)); | |
487 | static void output_inst PARAMS ((char *)); | |
488 | #ifdef OBJ_ELF | |
661e4995 | 489 | static bfd_reloc_code_real_type arm_parse_reloc PARAMS ((void)); |
252b5132 RH |
490 | #endif |
491 | ||
492 | /* ARM instructions take 4bytes in the object file, Thumb instructions | |
493 | take 2: */ | |
494 | #define INSN_SIZE 4 | |
495 | ||
496 | /* LONGEST_INST is the longest basic instruction name without conditions or | |
497 | * flags. | |
498 | * ARM7M has 4 of length 5 | |
499 | */ | |
500 | ||
501 | #define LONGEST_INST 5 | |
502 | ||
503 | struct asm_opcode | |
504 | { | |
505 | CONST char * template; /* Basic string to match */ | |
506 | unsigned long value; /* Basic instruction code */ | |
507 | CONST char * comp_suffix; /* Compulsory suffix that must follow conds */ | |
508 | CONST struct asm_flg * flags; /* Bits to toggle if flag 'n' set */ | |
509 | unsigned long variants; /* Which CPU variants this exists for */ | |
510 | /* Function to call to parse args */ | |
511 | void (* parms) PARAMS ((char *, unsigned long)); | |
512 | }; | |
513 | ||
514 | static CONST struct asm_opcode insns[] = | |
515 | { | |
516 | /* ARM Instructions */ | |
517 | {"and", 0x00000000, NULL, s_flag, ARM_ANY, do_arit}, | |
518 | {"eor", 0x00200000, NULL, s_flag, ARM_ANY, do_arit}, | |
519 | {"sub", 0x00400000, NULL, s_flag, ARM_ANY, do_arit}, | |
520 | {"rsb", 0x00600000, NULL, s_flag, ARM_ANY, do_arit}, | |
521 | {"add", 0x00800000, NULL, s_flag, ARM_ANY, do_arit}, | |
522 | {"adc", 0x00a00000, NULL, s_flag, ARM_ANY, do_arit}, | |
523 | {"sbc", 0x00c00000, NULL, s_flag, ARM_ANY, do_arit}, | |
524 | {"rsc", 0x00e00000, NULL, s_flag, ARM_ANY, do_arit}, | |
525 | {"orr", 0x01800000, NULL, s_flag, ARM_ANY, do_arit}, | |
526 | {"bic", 0x01c00000, NULL, s_flag, ARM_ANY, do_arit}, | |
527 | {"tst", 0x01000000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
528 | {"teq", 0x01200000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
529 | {"cmp", 0x01400000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
530 | {"cmn", 0x01600000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
531 | {"mov", 0x01a00000, NULL, s_flag, ARM_ANY, do_mov}, | |
532 | {"mvn", 0x01e00000, NULL, s_flag, ARM_ANY, do_mov}, | |
533 | {"str", 0x04000000, NULL, str_flags, ARM_ANY, do_ldst}, | |
534 | {"ldr", 0x04100000, NULL, ldr_flags, ARM_ANY, do_ldst}, | |
535 | {"stm", 0x08000000, NULL, stm_flags, ARM_ANY, do_ldmstm}, | |
536 | {"ldm", 0x08100000, NULL, ldm_flags, ARM_ANY, do_ldmstm}, | |
537 | {"swi", 0x0f000000, NULL, NULL, ARM_ANY, do_swi}, | |
538 | {"bl", 0x0bfffffe, NULL, NULL, ARM_ANY, do_branch}, | |
539 | {"b", 0x0afffffe, NULL, NULL, ARM_ANY, do_branch}, | |
540 | ||
541 | /* Pseudo ops */ | |
542 | {"adr", 0x028f0000, NULL, NULL, ARM_ANY, do_adr}, | |
543 | {"nop", 0x01a00000, NULL, NULL, ARM_ANY, do_nop}, | |
544 | ||
545 | /* ARM 2 multiplies */ | |
546 | {"mul", 0x00000090, NULL, s_flag, ARM_2UP, do_mul}, | |
547 | {"mla", 0x00200090, NULL, s_flag, ARM_2UP, do_mla}, | |
548 | ||
549 | /* ARM 3 - swp instructions */ | |
550 | {"swp", 0x01000090, NULL, byte_flag, ARM_3UP, do_swap}, | |
551 | ||
552 | /* ARM 6 Coprocessor instructions */ | |
553 | {"mrs", 0x010f0000, NULL, NULL, ARM_6UP, do_mrs}, | |
554 | {"msr", 0x0120f000, NULL, NULL, ARM_6UP, do_msr}, | |
555 | /* ScottB: our code uses 0x0128f000 for msr. | |
556 | NickC: but this is wrong because the bits 16 and 19 are handled | |
557 | by the PSR_xxx defines above. */ | |
558 | ||
559 | /* ARM 7M long multiplies - need signed/unsigned flags! */ | |
560 | {"smull", 0x00c00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
561 | {"umull", 0x00800090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
562 | {"smlal", 0x00e00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
563 | {"umlal", 0x00a00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
564 | ||
565 | /* ARM THUMB interworking */ | |
566 | {"bx", 0x012fff10, NULL, NULL, ARM_THUMB, do_bx}, | |
567 | ||
568 | /* Floating point instructions */ | |
569 | {"wfs", 0x0e200110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
570 | {"rfs", 0x0e300110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
571 | {"wfc", 0x0e400110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
572 | {"rfc", 0x0e500110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
573 | {"ldf", 0x0c100100, "sdep", NULL, FPU_ALL, do_fp_ldst}, | |
574 | {"stf", 0x0c000100, "sdep", NULL, FPU_ALL, do_fp_ldst}, | |
575 | {"lfm", 0x0c100200, NULL, lfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, | |
576 | {"sfm", 0x0c000200, NULL, sfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, | |
577 | {"mvf", 0x0e008100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
578 | {"mnf", 0x0e108100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
579 | {"abs", 0x0e208100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
580 | {"rnd", 0x0e308100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
581 | {"sqt", 0x0e408100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
582 | {"log", 0x0e508100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
583 | {"lgn", 0x0e608100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
584 | {"exp", 0x0e708100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
585 | {"sin", 0x0e808100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
586 | {"cos", 0x0e908100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
587 | {"tan", 0x0ea08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
588 | {"asn", 0x0eb08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
589 | {"acs", 0x0ec08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
590 | {"atn", 0x0ed08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
591 | {"urd", 0x0ee08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
592 | {"nrm", 0x0ef08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
593 | {"adf", 0x0e000100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
594 | {"suf", 0x0e200100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
595 | {"rsf", 0x0e300100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
596 | {"muf", 0x0e100100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
597 | {"dvf", 0x0e400100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
598 | {"rdf", 0x0e500100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
599 | {"pow", 0x0e600100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
600 | {"rpw", 0x0e700100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
601 | {"rmf", 0x0e800100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
602 | {"fml", 0x0e900100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
603 | {"fdv", 0x0ea00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
604 | {"frd", 0x0eb00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
605 | {"pol", 0x0ec00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
606 | {"cmf", 0x0e90f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, | |
607 | {"cnf", 0x0eb0f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, | |
608 | /* The FPA10 data sheet suggests that the 'E' of cmfe/cnfe should not | |
609 | be an optional suffix, but part of the instruction. To be compatible, | |
610 | we accept either. */ | |
611 | {"cmfe", 0x0ed0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, | |
612 | {"cnfe", 0x0ef0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, | |
613 | {"flt", 0x0e000110, "sde", round_flags, FPU_ALL, do_fp_from_reg}, | |
614 | {"fix", 0x0e100110, NULL, fix_flags, FPU_ALL, do_fp_to_reg}, | |
615 | ||
616 | /* Generic copressor instructions */ | |
617 | {"cdp", 0x0e000000, NULL, NULL, ARM_2UP, do_cdp}, | |
618 | {"ldc", 0x0c100000, NULL, cplong_flag, ARM_2UP, do_lstc}, | |
619 | {"stc", 0x0c000000, NULL, cplong_flag, ARM_2UP, do_lstc}, | |
620 | {"mcr", 0x0e000010, NULL, NULL, ARM_2UP, do_co_reg}, | |
621 | {"mrc", 0x0e100010, NULL, NULL, ARM_2UP, do_co_reg}, | |
622 | }; | |
623 | ||
624 | /* defines for various bits that we will want to toggle */ | |
625 | ||
626 | #define INST_IMMEDIATE 0x02000000 | |
627 | #define OFFSET_REG 0x02000000 | |
628 | #define HWOFFSET_IMM 0x00400000 | |
629 | #define SHIFT_BY_REG 0x00000010 | |
630 | #define PRE_INDEX 0x01000000 | |
631 | #define INDEX_UP 0x00800000 | |
632 | #define WRITE_BACK 0x00200000 | |
633 | #define MULTI_SET_PSR 0x00400000 | |
634 | ||
635 | #define LITERAL_MASK 0xf000f000 | |
636 | #define COND_MASK 0xf0000000 | |
637 | #define OPCODE_MASK 0xfe1fffff | |
638 | #define DATA_OP_SHIFT 21 | |
639 | ||
640 | /* Codes to distinguish the arithmetic instructions */ | |
641 | ||
642 | #define OPCODE_AND 0 | |
643 | #define OPCODE_EOR 1 | |
644 | #define OPCODE_SUB 2 | |
645 | #define OPCODE_RSB 3 | |
646 | #define OPCODE_ADD 4 | |
647 | #define OPCODE_ADC 5 | |
648 | #define OPCODE_SBC 6 | |
649 | #define OPCODE_RSC 7 | |
650 | #define OPCODE_TST 8 | |
651 | #define OPCODE_TEQ 9 | |
652 | #define OPCODE_CMP 10 | |
653 | #define OPCODE_CMN 11 | |
654 | #define OPCODE_ORR 12 | |
655 | #define OPCODE_MOV 13 | |
656 | #define OPCODE_BIC 14 | |
657 | #define OPCODE_MVN 15 | |
658 | ||
659 | static void do_t_nop PARAMS ((char *operands)); | |
660 | static void do_t_arit PARAMS ((char *operands)); | |
661 | static void do_t_add PARAMS ((char *operands)); | |
662 | static void do_t_asr PARAMS ((char *operands)); | |
663 | static void do_t_branch9 PARAMS ((char *operands)); | |
664 | static void do_t_branch12 PARAMS ((char *operands)); | |
665 | static void do_t_branch23 PARAMS ((char *operands)); | |
666 | static void do_t_bx PARAMS ((char *operands)); | |
667 | static void do_t_compare PARAMS ((char *operands)); | |
668 | static void do_t_ldmstm PARAMS ((char *operands)); | |
669 | static void do_t_ldr PARAMS ((char *operands)); | |
670 | static void do_t_ldrb PARAMS ((char *operands)); | |
671 | static void do_t_ldrh PARAMS ((char *operands)); | |
672 | static void do_t_lds PARAMS ((char *operands)); | |
673 | static void do_t_lsl PARAMS ((char *operands)); | |
674 | static void do_t_lsr PARAMS ((char *operands)); | |
675 | static void do_t_mov PARAMS ((char *operands)); | |
676 | static void do_t_push_pop PARAMS ((char *operands)); | |
677 | static void do_t_str PARAMS ((char *operands)); | |
678 | static void do_t_strb PARAMS ((char *operands)); | |
679 | static void do_t_strh PARAMS ((char *operands)); | |
680 | static void do_t_sub PARAMS ((char *operands)); | |
681 | static void do_t_swi PARAMS ((char *operands)); | |
682 | static void do_t_adr PARAMS ((char *operands)); | |
683 | ||
684 | #define T_OPCODE_MUL 0x4340 | |
685 | #define T_OPCODE_TST 0x4200 | |
686 | #define T_OPCODE_CMN 0x42c0 | |
687 | #define T_OPCODE_NEG 0x4240 | |
688 | #define T_OPCODE_MVN 0x43c0 | |
689 | ||
690 | #define T_OPCODE_ADD_R3 0x1800 | |
691 | #define T_OPCODE_SUB_R3 0x1a00 | |
692 | #define T_OPCODE_ADD_HI 0x4400 | |
693 | #define T_OPCODE_ADD_ST 0xb000 | |
694 | #define T_OPCODE_SUB_ST 0xb080 | |
695 | #define T_OPCODE_ADD_SP 0xa800 | |
696 | #define T_OPCODE_ADD_PC 0xa000 | |
697 | #define T_OPCODE_ADD_I8 0x3000 | |
698 | #define T_OPCODE_SUB_I8 0x3800 | |
699 | #define T_OPCODE_ADD_I3 0x1c00 | |
700 | #define T_OPCODE_SUB_I3 0x1e00 | |
701 | ||
702 | #define T_OPCODE_ASR_R 0x4100 | |
703 | #define T_OPCODE_LSL_R 0x4080 | |
704 | #define T_OPCODE_LSR_R 0x40c0 | |
705 | #define T_OPCODE_ASR_I 0x1000 | |
706 | #define T_OPCODE_LSL_I 0x0000 | |
707 | #define T_OPCODE_LSR_I 0x0800 | |
708 | ||
709 | #define T_OPCODE_MOV_I8 0x2000 | |
710 | #define T_OPCODE_CMP_I8 0x2800 | |
711 | #define T_OPCODE_CMP_LR 0x4280 | |
712 | #define T_OPCODE_MOV_HR 0x4600 | |
713 | #define T_OPCODE_CMP_HR 0x4500 | |
714 | ||
715 | #define T_OPCODE_LDR_PC 0x4800 | |
716 | #define T_OPCODE_LDR_SP 0x9800 | |
717 | #define T_OPCODE_STR_SP 0x9000 | |
718 | #define T_OPCODE_LDR_IW 0x6800 | |
719 | #define T_OPCODE_STR_IW 0x6000 | |
720 | #define T_OPCODE_LDR_IH 0x8800 | |
721 | #define T_OPCODE_STR_IH 0x8000 | |
722 | #define T_OPCODE_LDR_IB 0x7800 | |
723 | #define T_OPCODE_STR_IB 0x7000 | |
724 | #define T_OPCODE_LDR_RW 0x5800 | |
725 | #define T_OPCODE_STR_RW 0x5000 | |
726 | #define T_OPCODE_LDR_RH 0x5a00 | |
727 | #define T_OPCODE_STR_RH 0x5200 | |
728 | #define T_OPCODE_LDR_RB 0x5c00 | |
729 | #define T_OPCODE_STR_RB 0x5400 | |
730 | ||
731 | #define T_OPCODE_PUSH 0xb400 | |
732 | #define T_OPCODE_POP 0xbc00 | |
733 | ||
734 | #define T_OPCODE_BRANCH 0xe7fe | |
735 | ||
736 | static int thumb_reg PARAMS ((char ** str, int hi_lo)); | |
737 | ||
738 | #define THUMB_SIZE 2 /* Size of thumb instruction */ | |
739 | #define THUMB_REG_LO 0x1 | |
740 | #define THUMB_REG_HI 0x2 | |
741 | #define THUMB_REG_ANY 0x3 | |
742 | ||
743 | #define THUMB_H1 0x0080 | |
744 | #define THUMB_H2 0x0040 | |
745 | ||
746 | #define THUMB_ASR 0 | |
747 | #define THUMB_LSL 1 | |
748 | #define THUMB_LSR 2 | |
749 | ||
750 | #define THUMB_MOVE 0 | |
751 | #define THUMB_COMPARE 1 | |
752 | ||
753 | #define THUMB_LOAD 0 | |
754 | #define THUMB_STORE 1 | |
755 | ||
756 | #define THUMB_PP_PC_LR 0x0100 | |
757 | ||
758 | /* These three are used for immediate shifts, do not alter */ | |
759 | #define THUMB_WORD 2 | |
760 | #define THUMB_HALFWORD 1 | |
761 | #define THUMB_BYTE 0 | |
762 | ||
763 | struct thumb_opcode | |
764 | { | |
765 | CONST char * template; /* Basic string to match */ | |
766 | unsigned long value; /* Basic instruction code */ | |
767 | int size; | |
768 | void (* parms) PARAMS ((char *)); /* Function to call to parse args */ | |
769 | }; | |
770 | ||
771 | static CONST struct thumb_opcode tinsns[] = | |
772 | { | |
773 | {"adc", 0x4140, 2, do_t_arit}, | |
774 | {"add", 0x0000, 2, do_t_add}, | |
775 | {"and", 0x4000, 2, do_t_arit}, | |
776 | {"asr", 0x0000, 2, do_t_asr}, | |
777 | {"b", T_OPCODE_BRANCH, 2, do_t_branch12}, | |
778 | {"beq", 0xd0fe, 2, do_t_branch9}, | |
779 | {"bne", 0xd1fe, 2, do_t_branch9}, | |
780 | {"bcs", 0xd2fe, 2, do_t_branch9}, | |
781 | {"bhs", 0xd2fe, 2, do_t_branch9}, | |
782 | {"bcc", 0xd3fe, 2, do_t_branch9}, | |
783 | {"bul", 0xd3fe, 2, do_t_branch9}, | |
784 | {"blo", 0xd3fe, 2, do_t_branch9}, | |
785 | {"bmi", 0xd4fe, 2, do_t_branch9}, | |
786 | {"bpl", 0xd5fe, 2, do_t_branch9}, | |
787 | {"bvs", 0xd6fe, 2, do_t_branch9}, | |
788 | {"bvc", 0xd7fe, 2, do_t_branch9}, | |
789 | {"bhi", 0xd8fe, 2, do_t_branch9}, | |
790 | {"bls", 0xd9fe, 2, do_t_branch9}, | |
791 | {"bge", 0xdafe, 2, do_t_branch9}, | |
792 | {"blt", 0xdbfe, 2, do_t_branch9}, | |
793 | {"bgt", 0xdcfe, 2, do_t_branch9}, | |
794 | {"ble", 0xddfe, 2, do_t_branch9}, | |
795 | {"bic", 0x4380, 2, do_t_arit}, | |
796 | {"bl", 0xf7fffffe, 4, do_t_branch23}, | |
797 | {"bx", 0x4700, 2, do_t_bx}, | |
798 | {"cmn", T_OPCODE_CMN, 2, do_t_arit}, | |
799 | {"cmp", 0x0000, 2, do_t_compare}, | |
800 | {"eor", 0x4040, 2, do_t_arit}, | |
801 | {"ldmia", 0xc800, 2, do_t_ldmstm}, | |
802 | {"ldr", 0x0000, 2, do_t_ldr}, | |
803 | {"ldrb", 0x0000, 2, do_t_ldrb}, | |
804 | {"ldrh", 0x0000, 2, do_t_ldrh}, | |
805 | {"ldrsb", 0x5600, 2, do_t_lds}, | |
806 | {"ldrsh", 0x5e00, 2, do_t_lds}, | |
807 | {"ldsb", 0x5600, 2, do_t_lds}, | |
808 | {"ldsh", 0x5e00, 2, do_t_lds}, | |
809 | {"lsl", 0x0000, 2, do_t_lsl}, | |
810 | {"lsr", 0x0000, 2, do_t_lsr}, | |
811 | {"mov", 0x0000, 2, do_t_mov}, | |
812 | {"mul", T_OPCODE_MUL, 2, do_t_arit}, | |
813 | {"mvn", T_OPCODE_MVN, 2, do_t_arit}, | |
814 | {"neg", T_OPCODE_NEG, 2, do_t_arit}, | |
815 | {"orr", 0x4300, 2, do_t_arit}, | |
816 | {"pop", 0xbc00, 2, do_t_push_pop}, | |
817 | {"push", 0xb400, 2, do_t_push_pop}, | |
818 | {"ror", 0x41c0, 2, do_t_arit}, | |
819 | {"sbc", 0x4180, 2, do_t_arit}, | |
820 | {"stmia", 0xc000, 2, do_t_ldmstm}, | |
821 | {"str", 0x0000, 2, do_t_str}, | |
822 | {"strb", 0x0000, 2, do_t_strb}, | |
823 | {"strh", 0x0000, 2, do_t_strh}, | |
824 | {"swi", 0xdf00, 2, do_t_swi}, | |
825 | {"sub", 0x0000, 2, do_t_sub}, | |
826 | {"tst", T_OPCODE_TST, 2, do_t_arit}, | |
827 | /* Pseudo ops: */ | |
828 | {"adr", 0x0000, 2, do_t_adr}, | |
829 | {"nop", 0x46C0, 2, do_t_nop}, /* mov r8,r8 */ | |
830 | }; | |
831 | ||
832 | struct reg_entry | |
833 | { | |
834 | CONST char * name; | |
835 | int number; | |
836 | }; | |
837 | ||
838 | #define int_register(reg) ((reg) >= 0 && (reg) <= 15) | |
839 | #define cp_register(reg) ((reg) >= 32 && (reg) <= 47) | |
840 | #define fp_register(reg) ((reg) >= 16 && (reg) <= 23) | |
841 | ||
842 | #define REG_PC 15 | |
843 | #define REG_LR 14 | |
844 | #define REG_SP 13 | |
845 | ||
846 | /* These are the standard names; Users can add aliases with .req */ | |
847 | static CONST struct reg_entry reg_table[] = | |
848 | { | |
849 | /* Processor Register Numbers */ | |
850 | {"r0", 0}, {"r1", 1}, {"r2", 2}, {"r3", 3}, | |
851 | {"r4", 4}, {"r5", 5}, {"r6", 6}, {"r7", 7}, | |
852 | {"r8", 8}, {"r9", 9}, {"r10", 10}, {"r11", 11}, | |
853 | {"r12", 12}, {"r13", REG_SP},{"r14", REG_LR},{"r15", REG_PC}, | |
854 | /* APCS conventions */ | |
855 | {"a1", 0}, {"a2", 1}, {"a3", 2}, {"a4", 3}, | |
856 | {"v1", 4}, {"v2", 5}, {"v3", 6}, {"v4", 7}, {"v5", 8}, | |
857 | {"v6", 9}, {"sb", 9}, {"v7", 10}, {"sl", 10}, | |
858 | {"fp", 11}, {"ip", 12}, {"sp", REG_SP},{"lr", REG_LR},{"pc", REG_PC}, | |
859 | /* FP Registers */ | |
860 | {"f0", 16}, {"f1", 17}, {"f2", 18}, {"f3", 19}, | |
861 | {"f4", 20}, {"f5", 21}, {"f6", 22}, {"f7", 23}, | |
862 | {"c0", 32}, {"c1", 33}, {"c2", 34}, {"c3", 35}, | |
863 | {"c4", 36}, {"c5", 37}, {"c6", 38}, {"c7", 39}, | |
864 | {"c8", 40}, {"c9", 41}, {"c10", 42}, {"c11", 43}, | |
865 | {"c12", 44}, {"c13", 45}, {"c14", 46}, {"c15", 47}, | |
866 | {"cr0", 32}, {"cr1", 33}, {"cr2", 34}, {"cr3", 35}, | |
867 | {"cr4", 36}, {"cr5", 37}, {"cr6", 38}, {"cr7", 39}, | |
868 | {"cr8", 40}, {"cr9", 41}, {"cr10", 42}, {"cr11", 43}, | |
869 | {"cr12", 44}, {"cr13", 45}, {"cr14", 46}, {"cr15", 47}, | |
870 | {NULL, 0} | |
871 | }; | |
872 | ||
873 | #define bad_args _("Bad arguments to instruction"); | |
874 | #define bad_pc _("r15 not allowed here"); | |
875 | ||
876 | static struct hash_control * arm_ops_hsh = NULL; | |
877 | static struct hash_control * arm_tops_hsh = NULL; | |
878 | static struct hash_control * arm_cond_hsh = NULL; | |
879 | static struct hash_control * arm_shift_hsh = NULL; | |
880 | static struct hash_control * arm_reg_hsh = NULL; | |
881 | static struct hash_control * arm_psr_hsh = NULL; | |
882 | ||
883 | /* This table describes all the machine specific pseudo-ops the assembler | |
884 | has to support. The fields are: | |
885 | pseudo-op name without dot | |
886 | function to call to execute this pseudo-op | |
887 | Integer arg to pass to the function | |
888 | */ | |
889 | ||
890 | static void s_req PARAMS ((int)); | |
891 | static void s_align PARAMS ((int)); | |
892 | static void s_bss PARAMS ((int)); | |
893 | static void s_even PARAMS ((int)); | |
894 | static void s_ltorg PARAMS ((int)); | |
895 | static void s_arm PARAMS ((int)); | |
896 | static void s_thumb PARAMS ((int)); | |
897 | static void s_code PARAMS ((int)); | |
898 | static void s_force_thumb PARAMS ((int)); | |
899 | static void s_thumb_func PARAMS ((int)); | |
900 | #ifdef OBJ_ELF | |
901 | static void s_arm_elf_cons PARAMS ((int)); | |
902 | #endif | |
903 | ||
904 | static int my_get_expression PARAMS ((expressionS *, char **)); | |
905 | ||
906 | CONST pseudo_typeS md_pseudo_table[] = | |
907 | { | |
908 | {"req", s_req, 0}, /* Never called becasue '.req' does not start line */ | |
909 | {"bss", s_bss, 0}, | |
910 | {"align", s_align, 0}, | |
911 | {"arm", s_arm, 0}, | |
912 | {"thumb", s_thumb, 0}, | |
913 | {"code", s_code, 0}, | |
914 | {"force_thumb", s_force_thumb, 0}, | |
915 | {"thumb_func", s_thumb_func, 0}, | |
916 | {"even", s_even, 0}, | |
917 | {"ltorg", s_ltorg, 0}, | |
918 | {"pool", s_ltorg, 0}, | |
919 | #ifdef OBJ_ELF | |
920 | {"word", s_arm_elf_cons, 4}, | |
921 | {"long", s_arm_elf_cons, 4}, | |
922 | #else | |
923 | {"word", cons, 4}, | |
924 | #endif | |
925 | {"extend", float_cons, 'x'}, | |
926 | {"ldouble", float_cons, 'x'}, | |
927 | {"packed", float_cons, 'p'}, | |
928 | {0, 0, 0} | |
929 | }; | |
930 | ||
931 | /* Stuff needed to resolve the label ambiguity | |
932 | As: | |
933 | ... | |
934 | label: <insn> | |
935 | may differ from: | |
936 | ... | |
937 | label: | |
938 | <insn> | |
939 | */ | |
940 | ||
941 | symbolS * last_label_seen; | |
942 | static int label_is_thumb_function_name = false; | |
943 | ||
944 | /* Literal stuff */ | |
945 | ||
946 | #define MAX_LITERAL_POOL_SIZE 1024 | |
947 | ||
948 | typedef struct literalS | |
949 | { | |
950 | struct expressionS exp; | |
951 | struct arm_it * inst; | |
952 | } literalT; | |
953 | ||
954 | literalT literals[MAX_LITERAL_POOL_SIZE]; | |
955 | int next_literal_pool_place = 0; /* Next free entry in the pool */ | |
956 | int lit_pool_num = 1; /* Next literal pool number */ | |
957 | symbolS * current_poolP = NULL; | |
252b5132 RH |
958 | |
959 | static int | |
960 | add_to_lit_pool () | |
961 | { | |
962 | int lit_count = 0; | |
963 | ||
964 | if (current_poolP == NULL) | |
174419c1 ILT |
965 | current_poolP = symbol_create (FAKE_LABEL_NAME, undefined_section, |
966 | (valueT) 0, &zero_address_frag); | |
252b5132 RH |
967 | |
968 | /* Check if this literal value is already in the pool: */ | |
969 | while (lit_count < next_literal_pool_place) | |
970 | { | |
971 | if (literals[lit_count].exp.X_op == inst.reloc.exp.X_op | |
972 | && inst.reloc.exp.X_op == O_constant | |
973 | && literals[lit_count].exp.X_add_number == inst.reloc.exp.X_add_number | |
974 | && literals[lit_count].exp.X_unsigned == inst.reloc.exp.X_unsigned) | |
975 | break; | |
976 | lit_count++; | |
977 | } | |
978 | ||
979 | if (lit_count == next_literal_pool_place) /* new entry */ | |
980 | { | |
981 | if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE) | |
982 | { | |
983 | inst.error = _("Literal Pool Overflow"); | |
984 | return FAIL; | |
985 | } | |
986 | ||
987 | literals[next_literal_pool_place].exp = inst.reloc.exp; | |
988 | lit_count = next_literal_pool_place++; | |
989 | } | |
990 | ||
991 | inst.reloc.exp.X_op = O_symbol; | |
992 | inst.reloc.exp.X_add_number = (lit_count) * 4 - 8; | |
993 | inst.reloc.exp.X_add_symbol = current_poolP; | |
994 | ||
995 | return SUCCESS; | |
996 | } | |
997 | ||
998 | /* Can't use symbol_new here, so have to create a symbol and then at | |
999 | a later date assign it a value. Thats what these functions do. */ | |
1000 | static void | |
1001 | symbol_locate (symbolP, name, segment, valu, frag) | |
1002 | symbolS * symbolP; | |
1003 | CONST char * name; /* It is copied, the caller can modify */ | |
1004 | segT segment; /* Segment identifier (SEG_<something>) */ | |
1005 | valueT valu; /* Symbol value */ | |
1006 | fragS * frag; /* Associated fragment */ | |
1007 | { | |
1008 | unsigned int name_length; | |
1009 | char * preserved_copy_of_name; | |
1010 | ||
1011 | name_length = strlen (name) + 1; /* +1 for \0 */ | |
1012 | obstack_grow (¬es, name, name_length); | |
1013 | preserved_copy_of_name = obstack_finish (¬es); | |
1014 | #ifdef STRIP_UNDERSCORE | |
1015 | if (preserved_copy_of_name[0] == '_') | |
1016 | preserved_copy_of_name++; | |
1017 | #endif | |
1018 | ||
1019 | #ifdef tc_canonicalize_symbol_name | |
1020 | preserved_copy_of_name = | |
1021 | tc_canonicalize_symbol_name (preserved_copy_of_name); | |
1022 | #endif | |
1023 | ||
1024 | S_SET_NAME (symbolP, preserved_copy_of_name); | |
1025 | ||
1026 | S_SET_SEGMENT (symbolP, segment); | |
1027 | S_SET_VALUE (symbolP, valu); | |
1028 | symbol_clear_list_pointers(symbolP); | |
1029 | ||
174419c1 | 1030 | symbol_set_frag (symbolP, frag); |
252b5132 RH |
1031 | |
1032 | /* Link to end of symbol chain. */ | |
1033 | { | |
1034 | extern int symbol_table_frozen; | |
1035 | if (symbol_table_frozen) | |
1036 | abort (); | |
1037 | } | |
1038 | ||
1039 | symbol_append (symbolP, symbol_lastP, & symbol_rootP, & symbol_lastP); | |
1040 | ||
1041 | obj_symbol_new_hook (symbolP); | |
1042 | ||
1043 | #ifdef tc_symbol_new_hook | |
1044 | tc_symbol_new_hook (symbolP); | |
1045 | #endif | |
1046 | ||
1047 | #ifdef DEBUG_SYMS | |
1048 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
1049 | #endif /* DEBUG_SYMS */ | |
1050 | } | |
1051 | ||
252b5132 RH |
1052 | /* Check that an immediate is valid, and if so, convert it to the right format. */ |
1053 | ||
1054 | static unsigned int | |
1055 | validate_immediate (val) | |
1056 | unsigned int val; | |
1057 | { | |
1058 | unsigned int a; | |
1059 | unsigned int i; | |
1060 | ||
1061 | #define rotate_left(v, n) (v << n | v >> (32 - n)) | |
1062 | ||
1063 | for (i = 0; i < 32; i += 2) | |
1064 | if ((a = rotate_left (val, i)) <= 0xff) | |
1065 | return a | (i << 7); /* 12-bit pack: [shift-cnt,const] */ | |
1066 | ||
1067 | return FAIL; | |
1068 | } | |
1069 | ||
1070 | static int | |
1071 | validate_offset_imm (val, hwse) | |
1072 | int val; | |
1073 | int hwse; | |
1074 | { | |
1075 | if ((hwse && (val < -255 || val > 255)) | |
1076 | || (val < -4095 || val > 4095)) | |
1077 | return FAIL; | |
1078 | return val; | |
1079 | } | |
1080 | ||
1081 | ||
1082 | static void | |
1083 | s_req (a) | |
1084 | int a; | |
1085 | { | |
1086 | as_bad (_("Invalid syntax for .req directive.")); | |
1087 | } | |
1088 | ||
1089 | static void | |
1090 | s_bss (ignore) | |
1091 | int ignore; | |
1092 | { | |
1093 | /* We don't support putting frags in the BSS segment, we fake it by | |
1094 | marking in_bss, then looking at s_skip for clues?.. */ | |
1095 | subseg_set (bss_section, 0); | |
1096 | demand_empty_rest_of_line (); | |
1097 | } | |
1098 | ||
1099 | static void | |
1100 | s_even (ignore) | |
1101 | int ignore; | |
1102 | { | |
1103 | if (!need_pass_2) /* Never make frag if expect extra pass. */ | |
1104 | frag_align (1, 0, 0); | |
1105 | ||
1106 | record_alignment (now_seg, 1); | |
1107 | ||
1108 | demand_empty_rest_of_line (); | |
1109 | } | |
1110 | ||
1111 | static void | |
1112 | s_ltorg (internal) | |
1113 | int internal; | |
1114 | { | |
1115 | int lit_count = 0; | |
1116 | char sym_name[20]; | |
1117 | ||
1118 | if (current_poolP == NULL) | |
1119 | { | |
1120 | /* Nothing to do */ | |
1121 | if (!internal) | |
1122 | as_tsktsk (_("Nothing to put in the pool\n")); | |
1123 | return; | |
1124 | } | |
1125 | ||
1126 | /* Align pool as you have word accesses */ | |
1127 | /* Only make a frag if we have to ... */ | |
1128 | if (!need_pass_2) | |
1129 | frag_align (2, 0, 0); | |
1130 | ||
1131 | record_alignment (now_seg, 2); | |
1132 | ||
1133 | if (internal) | |
1134 | as_tsktsk (_("Inserting implicit pool at change of section")); | |
1135 | ||
1136 | sprintf (sym_name, "$$lit_\002%x", lit_pool_num++); | |
1137 | ||
1138 | symbol_locate (current_poolP, sym_name, now_seg, | |
1139 | (valueT) frag_now_fix (), frag_now); | |
1140 | symbol_table_insert (current_poolP); | |
1141 | ||
1142 | ARM_SET_THUMB (current_poolP, thumb_mode); | |
1143 | ||
1144 | #if defined OBJ_COFF || defined OBJ_ELF | |
1145 | ARM_SET_INTERWORK (current_poolP, support_interwork); | |
1146 | #endif | |
1147 | ||
1148 | while (lit_count < next_literal_pool_place) | |
1149 | /* First output the expression in the instruction to the pool */ | |
1150 | emit_expr (&(literals[lit_count++].exp), 4); /* .word */ | |
1151 | ||
1152 | next_literal_pool_place = 0; | |
1153 | current_poolP = NULL; | |
1154 | } | |
1155 | ||
1156 | static void | |
1157 | s_align (unused) /* Same as s_align_ptwo but align 0 => align 2 */ | |
1158 | int unused; | |
1159 | { | |
1160 | register int temp; | |
1161 | register long temp_fill; | |
1162 | long max_alignment = 15; | |
1163 | ||
1164 | temp = get_absolute_expression (); | |
1165 | if (temp > max_alignment) | |
1166 | as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment); | |
1167 | else if (temp < 0) | |
1168 | { | |
1169 | as_bad (_("Alignment negative. 0 assumed.")); | |
1170 | temp = 0; | |
1171 | } | |
1172 | ||
1173 | if (*input_line_pointer == ',') | |
1174 | { | |
1175 | input_line_pointer++; | |
1176 | temp_fill = get_absolute_expression (); | |
1177 | } | |
1178 | else | |
1179 | temp_fill = 0; | |
1180 | ||
1181 | if (!temp) | |
1182 | temp = 2; | |
1183 | ||
1184 | /* Only make a frag if we HAVE to. . . */ | |
1185 | if (temp && !need_pass_2) | |
1186 | frag_align (temp, (int) temp_fill, 0); | |
1187 | demand_empty_rest_of_line (); | |
1188 | ||
1189 | record_alignment (now_seg, temp); | |
1190 | } | |
1191 | ||
1192 | static void | |
1193 | s_force_thumb (ignore) | |
1194 | int ignore; | |
1195 | { | |
1196 | /* If we are not already in thumb mode go into it, EVEN if | |
1197 | the target processor does not support thumb instructions. | |
1198 | This is used by gcc/config/arm/lib1funcs.asm for example | |
1199 | to compile interworking support functions even if the | |
1200 | target processor should not support interworking. */ | |
1201 | ||
1202 | if (! thumb_mode) | |
1203 | { | |
1204 | thumb_mode = 1; | |
1205 | ||
1206 | record_alignment (now_seg, 1); | |
1207 | } | |
1208 | ||
1209 | demand_empty_rest_of_line (); | |
1210 | } | |
1211 | ||
1212 | static void | |
1213 | s_thumb_func (ignore) | |
1214 | int ignore; | |
1215 | { | |
1216 | /* The following label is the name/address of the start of a Thumb function. | |
1217 | We need to know this for the interworking support. */ | |
1218 | ||
1219 | label_is_thumb_function_name = true; | |
1220 | ||
1221 | demand_empty_rest_of_line (); | |
1222 | } | |
1223 | ||
1224 | static void | |
1225 | opcode_select (width) | |
1226 | int width; | |
1227 | { | |
1228 | switch (width) | |
1229 | { | |
1230 | case 16: | |
1231 | if (! thumb_mode) | |
1232 | { | |
1233 | if (! (cpu_variant & ARM_THUMB)) | |
1234 | as_bad (_("selected processor does not support THUMB opcodes")); | |
1235 | thumb_mode = 1; | |
1236 | /* No need to force the alignment, since we will have been | |
1237 | coming from ARM mode, which is word-aligned. */ | |
1238 | record_alignment (now_seg, 1); | |
1239 | } | |
1240 | break; | |
1241 | ||
1242 | case 32: | |
1243 | if (thumb_mode) | |
1244 | { | |
1245 | if ((cpu_variant & ARM_ANY) == ARM_THUMB) | |
1246 | as_bad (_("selected processor does not support ARM opcodes")); | |
1247 | thumb_mode = 0; | |
1248 | if (!need_pass_2) | |
1249 | frag_align (2, 0, 0); | |
1250 | record_alignment (now_seg, 1); | |
1251 | } | |
1252 | break; | |
1253 | ||
1254 | default: | |
1255 | as_bad (_("invalid instruction size selected (%d)"), width); | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | static void | |
1260 | s_arm (ignore) | |
1261 | int ignore; | |
1262 | { | |
1263 | opcode_select (32); | |
1264 | demand_empty_rest_of_line (); | |
1265 | } | |
1266 | ||
1267 | static void | |
1268 | s_thumb (ignore) | |
1269 | int ignore; | |
1270 | { | |
1271 | opcode_select (16); | |
1272 | demand_empty_rest_of_line (); | |
1273 | } | |
1274 | ||
1275 | static void | |
1276 | s_code (unused) | |
1277 | int unused; | |
1278 | { | |
1279 | register int temp; | |
1280 | ||
1281 | temp = get_absolute_expression (); | |
1282 | switch (temp) | |
1283 | { | |
1284 | case 16: | |
1285 | case 32: | |
1286 | opcode_select (temp); | |
1287 | break; | |
1288 | ||
1289 | default: | |
1290 | as_bad (_("invalid operand to .code directive (%d) (expecting 16 or 32)"), temp); | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | static void | |
1295 | end_of_line (str) | |
1296 | char * str; | |
1297 | { | |
1298 | while (*str == ' ') | |
1299 | str++; | |
1300 | ||
1301 | if (*str != '\0') | |
1302 | inst.error = _("Garbage following instruction"); | |
1303 | } | |
1304 | ||
1305 | static int | |
1306 | skip_past_comma (str) | |
1307 | char ** str; | |
1308 | { | |
1309 | char *p = *str, c; | |
1310 | int comma = 0; | |
1311 | ||
1312 | while ((c = *p) == ' ' || c == ',') | |
1313 | { | |
1314 | p++; | |
1315 | if (c == ',' && comma++) | |
1316 | return FAIL; | |
1317 | } | |
1318 | ||
1319 | if (c == '\0') | |
1320 | return FAIL; | |
1321 | ||
1322 | *str = p; | |
1323 | return comma ? SUCCESS : FAIL; | |
1324 | } | |
1325 | ||
1326 | /* A standard register must be given at this point. Shift is the place to | |
1327 | put it in the instruction. */ | |
1328 | ||
1329 | static int | |
1330 | reg_required_here (str, shift) | |
1331 | char ** str; | |
1332 | int shift; | |
1333 | { | |
1334 | static char buff [128]; /* XXX */ | |
1335 | int reg; | |
1336 | char * start = *str; | |
1337 | ||
1338 | if ((reg = arm_reg_parse (str)) != FAIL && int_register (reg)) | |
1339 | { | |
1340 | if (shift >= 0) | |
1341 | inst.instruction |= reg << shift; | |
1342 | return reg; | |
1343 | } | |
1344 | ||
1345 | /* Restore the start point, we may have got a reg of the wrong class. */ | |
1346 | *str = start; | |
1347 | ||
1348 | /* In the few cases where we might be able to accept something else | |
1349 | this error can be overridden */ | |
1350 | sprintf (buff, _("Register expected, not '%.100s'"), start); | |
1351 | inst.error = buff; | |
1352 | ||
1353 | return FAIL; | |
1354 | } | |
1355 | ||
1356 | static int | |
1357 | psr_required_here (str, cpsr, spsr) | |
1358 | char ** str; | |
1359 | int cpsr; | |
1360 | int spsr; | |
1361 | { | |
1362 | int psr; | |
1363 | char * start = *str; | |
1364 | psr = arm_psr_parse (str); | |
1365 | ||
1366 | if (psr == cpsr || psr == spsr) | |
1367 | { | |
1368 | if (psr == spsr) | |
1369 | inst.instruction |= 1 << 22; | |
1370 | ||
1371 | return SUCCESS; | |
1372 | } | |
1373 | ||
1374 | /* In the few cases where we might be able to accept something else | |
1375 | this error can be overridden */ | |
1376 | inst.error = _("<psr(f)> expected"); | |
1377 | ||
1378 | /* Restore the start point. */ | |
1379 | *str = start; | |
1380 | return FAIL; | |
1381 | } | |
1382 | ||
1383 | static int | |
1384 | co_proc_number (str) | |
1385 | char **str; | |
1386 | { | |
1387 | int processor, pchar; | |
1388 | ||
1389 | while (**str == ' ') | |
1390 | (*str)++; | |
1391 | ||
1392 | /* The data sheet seems to imply that just a number on its own is valid | |
1393 | here, but the RISC iX assembler seems to accept a prefix 'p'. We will | |
1394 | accept either. */ | |
1395 | if (**str == 'p' || **str == 'P') | |
1396 | (*str)++; | |
1397 | ||
1398 | pchar = *(*str)++; | |
1399 | if (pchar >= '0' && pchar <= '9') | |
1400 | { | |
1401 | processor = pchar - '0'; | |
1402 | if (**str >= '0' && **str <= '9') | |
1403 | { | |
1404 | processor = processor * 10 + *(*str)++ - '0'; | |
1405 | if (processor > 15) | |
1406 | { | |
1407 | inst.error = _("Illegal co-processor number"); | |
1408 | return FAIL; | |
1409 | } | |
1410 | } | |
1411 | } | |
1412 | else | |
1413 | { | |
1414 | inst.error = _("Bad or missing co-processor number"); | |
1415 | return FAIL; | |
1416 | } | |
1417 | ||
1418 | inst.instruction |= processor << 8; | |
1419 | return SUCCESS; | |
1420 | } | |
1421 | ||
1422 | static int | |
1423 | cp_opc_expr (str, where, length) | |
1424 | char ** str; | |
1425 | int where; | |
1426 | int length; | |
1427 | { | |
1428 | expressionS expr; | |
1429 | ||
1430 | while (**str == ' ') | |
1431 | (*str)++; | |
1432 | ||
1433 | memset (&expr, '\0', sizeof (expr)); | |
1434 | ||
1435 | if (my_get_expression (&expr, str)) | |
1436 | return FAIL; | |
1437 | if (expr.X_op != O_constant) | |
1438 | { | |
1439 | inst.error = _("bad or missing expression"); | |
1440 | return FAIL; | |
1441 | } | |
1442 | ||
1443 | if ((expr.X_add_number & ((1 << length) - 1)) != expr.X_add_number) | |
1444 | { | |
1445 | inst.error = _("immediate co-processor expression too large"); | |
1446 | return FAIL; | |
1447 | } | |
1448 | ||
1449 | inst.instruction |= expr.X_add_number << where; | |
1450 | return SUCCESS; | |
1451 | } | |
1452 | ||
1453 | static int | |
1454 | cp_reg_required_here (str, where) | |
1455 | char ** str; | |
1456 | int where; | |
1457 | { | |
1458 | int reg; | |
1459 | char * start = *str; | |
1460 | ||
1461 | if ((reg = arm_reg_parse (str)) != FAIL && cp_register (reg)) | |
1462 | { | |
1463 | reg &= 15; | |
1464 | inst.instruction |= reg << where; | |
1465 | return reg; | |
1466 | } | |
1467 | ||
1468 | /* In the few cases where we might be able to accept something else | |
1469 | this error can be overridden */ | |
1470 | inst.error = _("Co-processor register expected"); | |
1471 | ||
1472 | /* Restore the start point */ | |
1473 | *str = start; | |
1474 | return FAIL; | |
1475 | } | |
1476 | ||
1477 | static int | |
1478 | fp_reg_required_here (str, where) | |
1479 | char ** str; | |
1480 | int where; | |
1481 | { | |
1482 | int reg; | |
1483 | char * start = *str; | |
1484 | ||
1485 | if ((reg = arm_reg_parse (str)) != FAIL && fp_register (reg)) | |
1486 | { | |
1487 | reg &= 7; | |
1488 | inst.instruction |= reg << where; | |
1489 | return reg; | |
1490 | } | |
1491 | ||
1492 | /* In the few cases where we might be able to accept something else | |
1493 | this error can be overridden */ | |
1494 | inst.error = _("Floating point register expected"); | |
1495 | ||
1496 | /* Restore the start point */ | |
1497 | *str = start; | |
1498 | return FAIL; | |
1499 | } | |
1500 | ||
1501 | static int | |
1502 | cp_address_offset (str) | |
1503 | char ** str; | |
1504 | { | |
1505 | int offset; | |
1506 | ||
1507 | while (**str == ' ') | |
1508 | (*str)++; | |
1509 | ||
1510 | if (! is_immediate_prefix (**str)) | |
1511 | { | |
1512 | inst.error = _("immediate expression expected"); | |
1513 | return FAIL; | |
1514 | } | |
1515 | ||
1516 | (*str)++; | |
1517 | ||
1518 | if (my_get_expression (& inst.reloc.exp, str)) | |
1519 | return FAIL; | |
1520 | ||
1521 | if (inst.reloc.exp.X_op == O_constant) | |
1522 | { | |
1523 | offset = inst.reloc.exp.X_add_number; | |
1524 | ||
1525 | if (offset & 3) | |
1526 | { | |
1527 | inst.error = _("co-processor address must be word aligned"); | |
1528 | return FAIL; | |
1529 | } | |
1530 | ||
1531 | if (offset > 1023 || offset < -1023) | |
1532 | { | |
1533 | inst.error = _("offset too large"); | |
1534 | return FAIL; | |
1535 | } | |
1536 | ||
1537 | if (offset >= 0) | |
1538 | inst.instruction |= INDEX_UP; | |
1539 | else | |
1540 | offset = -offset; | |
1541 | ||
1542 | inst.instruction |= offset >> 2; | |
1543 | } | |
1544 | else | |
1545 | inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; | |
1546 | ||
1547 | return SUCCESS; | |
1548 | } | |
1549 | ||
1550 | static int | |
1551 | cp_address_required_here (str) | |
1552 | char ** str; | |
1553 | { | |
1554 | char * p = * str; | |
1555 | int pre_inc = 0; | |
1556 | int write_back = 0; | |
1557 | ||
1558 | if (*p == '[') | |
1559 | { | |
1560 | int reg; | |
1561 | ||
1562 | p++; | |
1563 | while (*p == ' ') | |
1564 | p++; | |
1565 | ||
1566 | if ((reg = reg_required_here (& p, 16)) == FAIL) | |
1567 | return FAIL; | |
1568 | ||
1569 | while (*p == ' ') | |
1570 | p++; | |
1571 | ||
1572 | if (*p == ']') | |
1573 | { | |
1574 | p++; | |
1575 | ||
1576 | if (skip_past_comma (& p) == SUCCESS) | |
1577 | { | |
1578 | /* [Rn], #expr */ | |
1579 | write_back = WRITE_BACK; | |
1580 | ||
1581 | if (reg == REG_PC) | |
1582 | { | |
1583 | inst.error = _("pc may not be used in post-increment"); | |
1584 | return FAIL; | |
1585 | } | |
1586 | ||
1587 | if (cp_address_offset (& p) == FAIL) | |
1588 | return FAIL; | |
1589 | } | |
1590 | else | |
1591 | pre_inc = PRE_INDEX | INDEX_UP; | |
1592 | } | |
1593 | else | |
1594 | { | |
1595 | /* '['Rn, #expr']'[!] */ | |
1596 | ||
1597 | if (skip_past_comma (& p) == FAIL) | |
1598 | { | |
1599 | inst.error = _("pre-indexed expression expected"); | |
1600 | return FAIL; | |
1601 | } | |
1602 | ||
1603 | pre_inc = PRE_INDEX; | |
1604 | ||
1605 | if (cp_address_offset (& p) == FAIL) | |
1606 | return FAIL; | |
1607 | ||
1608 | while (*p == ' ') | |
1609 | p++; | |
1610 | ||
1611 | if (*p++ != ']') | |
1612 | { | |
1613 | inst.error = _("missing ]"); | |
1614 | return FAIL; | |
1615 | } | |
1616 | ||
1617 | while (*p == ' ') | |
1618 | p++; | |
1619 | ||
1620 | if (*p == '!') | |
1621 | { | |
1622 | if (reg == REG_PC) | |
1623 | { | |
1624 | inst.error = _("pc may not be used with write-back"); | |
1625 | return FAIL; | |
1626 | } | |
1627 | ||
1628 | p++; | |
1629 | write_back = WRITE_BACK; | |
1630 | } | |
1631 | } | |
1632 | } | |
1633 | else | |
1634 | { | |
1635 | if (my_get_expression (&inst.reloc.exp, &p)) | |
1636 | return FAIL; | |
1637 | ||
1638 | inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; | |
1639 | inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ | |
1640 | inst.reloc.pc_rel = 1; | |
1641 | inst.instruction |= (REG_PC << 16); | |
1642 | pre_inc = PRE_INDEX; | |
1643 | } | |
1644 | ||
1645 | inst.instruction |= write_back | pre_inc; | |
1646 | *str = p; | |
1647 | return SUCCESS; | |
1648 | } | |
1649 | ||
1650 | static void | |
1651 | do_nop (str, flags) | |
1652 | char * str; | |
1653 | unsigned long flags; | |
1654 | { | |
1655 | /* Do nothing really */ | |
1656 | inst.instruction |= flags; /* This is pointless */ | |
1657 | end_of_line (str); | |
1658 | return; | |
1659 | } | |
1660 | ||
1661 | static void | |
1662 | do_mrs (str, flags) | |
1663 | char *str; | |
1664 | unsigned long flags; | |
1665 | { | |
1666 | /* Only one syntax */ | |
1667 | while (*str == ' ') | |
1668 | str++; | |
1669 | ||
1670 | if (reg_required_here (&str, 12) == FAIL) | |
1671 | { | |
1672 | inst.error = bad_args; | |
1673 | return; | |
1674 | } | |
1675 | ||
1676 | if (skip_past_comma (&str) == FAIL | |
1677 | || psr_required_here (& str, CPSR_ALL, SPSR_ALL) == FAIL) | |
1678 | { | |
1679 | inst.error = _("<psr> expected"); | |
1680 | return; | |
1681 | } | |
1682 | ||
1683 | inst.instruction |= flags; | |
1684 | end_of_line (str); | |
1685 | return; | |
1686 | } | |
1687 | ||
1688 | /* Three possible forms: "<psr>, Rm", "<psrf>, Rm", "<psrf>, #expression" */ | |
1689 | static void | |
1690 | do_msr (str, flags) | |
1691 | char * str; | |
1692 | unsigned long flags; | |
1693 | { | |
1694 | int reg; | |
1695 | ||
1696 | while (*str == ' ') | |
1697 | str ++; | |
1698 | ||
1699 | if (psr_required_here (&str, CPSR_ALL, SPSR_ALL) == SUCCESS) | |
1700 | { | |
1701 | inst.instruction |= PSR_ALL; | |
1702 | ||
1703 | /* Sytax should be "<psr>, Rm" */ | |
1704 | if (skip_past_comma (&str) == FAIL | |
1705 | || (reg = reg_required_here (&str, 0)) == FAIL) | |
1706 | { | |
1707 | inst.error = bad_args; | |
1708 | return; | |
1709 | } | |
1710 | } | |
1711 | else | |
1712 | { | |
1713 | if (psr_required_here (& str, CPSR_FLG, SPSR_FLG) == SUCCESS) | |
1714 | inst.instruction |= PSR_FLAGS; | |
1715 | else if (psr_required_here (& str, CPSR_CTL, SPSR_CTL) == SUCCESS) | |
1716 | inst.instruction |= PSR_CONTROL; | |
1717 | else | |
1718 | { | |
1719 | inst.error = bad_args; | |
1720 | return; | |
1721 | } | |
1722 | ||
1723 | if (skip_past_comma (&str) == FAIL) | |
1724 | { | |
1725 | inst.error = bad_args; | |
1726 | return; | |
1727 | } | |
1728 | ||
1729 | /* Syntax could be "<psrf>, rm", "<psrf>, #expression" */ | |
1730 | ||
1731 | if ((reg = reg_required_here (& str, 0)) != FAIL) | |
1732 | ; | |
1733 | /* Immediate expression */ | |
1734 | else if (is_immediate_prefix (* str)) | |
1735 | { | |
1736 | str ++; | |
1737 | inst.error = NULL; | |
1738 | ||
1739 | if (my_get_expression (& inst.reloc.exp, & str)) | |
1740 | { | |
1741 | inst.error = _("Register or shift expression expected"); | |
1742 | return; | |
1743 | } | |
1744 | ||
1745 | if (inst.reloc.exp.X_add_symbol) | |
1746 | { | |
1747 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
1748 | inst.reloc.pc_rel = 0; | |
1749 | } | |
1750 | else | |
1751 | { | |
1752 | unsigned value = validate_immediate (inst.reloc.exp.X_add_number); | |
1753 | if (value == FAIL) | |
1754 | { | |
1755 | inst.error = _("Invalid constant"); | |
1756 | return; | |
1757 | } | |
1758 | ||
1759 | inst.instruction |= value; | |
1760 | } | |
1761 | ||
1762 | flags |= INST_IMMEDIATE; | |
1763 | } | |
1764 | else | |
1765 | { | |
1766 | inst.error = _("Error: unrecognised syntax for second argument to msr instruction"); | |
1767 | return; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | inst.error = NULL; | |
1772 | inst.instruction |= flags; | |
1773 | end_of_line (str); | |
1774 | return; | |
1775 | } | |
1776 | ||
1777 | /* Long Multiply Parser | |
1778 | UMULL RdLo, RdHi, Rm, Rs | |
1779 | SMULL RdLo, RdHi, Rm, Rs | |
1780 | UMLAL RdLo, RdHi, Rm, Rs | |
1781 | SMLAL RdLo, RdHi, Rm, Rs | |
1782 | */ | |
1783 | static void | |
1784 | do_mull (str, flags) | |
1785 | char * str; | |
1786 | unsigned long flags; | |
1787 | { | |
1788 | int rdlo, rdhi, rm, rs; | |
1789 | ||
1790 | /* only one format "rdlo, rdhi, rm, rs" */ | |
1791 | while (*str == ' ') | |
1792 | str++; | |
1793 | ||
1794 | if ((rdlo = reg_required_here (&str, 12)) == FAIL) | |
1795 | { | |
1796 | inst.error = bad_args; | |
1797 | return; | |
1798 | } | |
1799 | ||
1800 | if (skip_past_comma (&str) == FAIL | |
1801 | || (rdhi = reg_required_here (&str, 16)) == FAIL) | |
1802 | { | |
1803 | inst.error = bad_args; | |
1804 | return; | |
1805 | } | |
1806 | ||
1807 | if (skip_past_comma (&str) == FAIL | |
1808 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
1809 | { | |
1810 | inst.error = bad_args; | |
1811 | return; | |
1812 | } | |
1813 | ||
1814 | /* rdhi, rdlo and rm must all be different */ | |
1815 | if (rdlo == rdhi || rdlo == rm || rdhi == rm) | |
1816 | as_tsktsk (_("rdhi, rdlo and rm must all be different")); | |
1817 | ||
1818 | if (skip_past_comma (&str) == FAIL | |
1819 | || (rs = reg_required_here (&str, 8)) == FAIL) | |
1820 | { | |
1821 | inst.error = bad_args; | |
1822 | return; | |
1823 | } | |
1824 | ||
1825 | if (rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC) | |
1826 | { | |
1827 | inst.error = bad_pc; | |
1828 | return; | |
1829 | } | |
1830 | ||
1831 | inst.instruction |= flags; | |
1832 | end_of_line (str); | |
1833 | return; | |
1834 | } | |
1835 | ||
1836 | static void | |
1837 | do_mul (str, flags) | |
1838 | char * str; | |
1839 | unsigned long flags; | |
1840 | { | |
1841 | int rd, rm; | |
1842 | ||
1843 | /* only one format "rd, rm, rs" */ | |
1844 | while (*str == ' ') | |
1845 | str++; | |
1846 | ||
1847 | if ((rd = reg_required_here (&str, 16)) == FAIL) | |
1848 | { | |
1849 | inst.error = bad_args; | |
1850 | return; | |
1851 | } | |
1852 | ||
1853 | if (rd == REG_PC) | |
1854 | { | |
1855 | inst.error = bad_pc; | |
1856 | return; | |
1857 | } | |
1858 | ||
1859 | if (skip_past_comma (&str) == FAIL | |
1860 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
1861 | { | |
1862 | inst.error = bad_args; | |
1863 | return; | |
1864 | } | |
1865 | ||
1866 | if (rm == REG_PC) | |
1867 | { | |
1868 | inst.error = bad_pc; | |
1869 | return; | |
1870 | } | |
1871 | ||
1872 | if (rm == rd) | |
1873 | as_tsktsk (_("rd and rm should be different in mul")); | |
1874 | ||
1875 | if (skip_past_comma (&str) == FAIL | |
1876 | || (rm = reg_required_here (&str, 8)) == FAIL) | |
1877 | { | |
1878 | inst.error = bad_args; | |
1879 | return; | |
1880 | } | |
1881 | ||
1882 | if (rm == REG_PC) | |
1883 | { | |
1884 | inst.error = bad_pc; | |
1885 | return; | |
1886 | } | |
1887 | ||
1888 | inst.instruction |= flags; | |
1889 | end_of_line (str); | |
1890 | return; | |
1891 | } | |
1892 | ||
1893 | static void | |
1894 | do_mla (str, flags) | |
1895 | char * str; | |
1896 | unsigned long flags; | |
1897 | { | |
1898 | int rd, rm; | |
1899 | ||
1900 | /* only one format "rd, rm, rs, rn" */ | |
1901 | while (*str == ' ') | |
1902 | str++; | |
1903 | ||
1904 | if ((rd = reg_required_here (&str, 16)) == FAIL) | |
1905 | { | |
1906 | inst.error = bad_args; | |
1907 | return; | |
1908 | } | |
1909 | ||
1910 | if (rd == REG_PC) | |
1911 | { | |
1912 | inst.error = bad_pc; | |
1913 | return; | |
1914 | } | |
1915 | ||
1916 | if (skip_past_comma (&str) == FAIL | |
1917 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
1918 | { | |
1919 | inst.error = bad_args; | |
1920 | return; | |
1921 | } | |
1922 | ||
1923 | if (rm == REG_PC) | |
1924 | { | |
1925 | inst.error = bad_pc; | |
1926 | return; | |
1927 | } | |
1928 | ||
1929 | if (rm == rd) | |
1930 | as_tsktsk (_("rd and rm should be different in mla")); | |
1931 | ||
1932 | if (skip_past_comma (&str) == FAIL | |
1933 | || (rd = reg_required_here (&str, 8)) == FAIL | |
1934 | || skip_past_comma (&str) == FAIL | |
1935 | || (rm = reg_required_here (&str, 12)) == FAIL) | |
1936 | { | |
1937 | inst.error = bad_args; | |
1938 | return; | |
1939 | } | |
1940 | ||
1941 | if (rd == REG_PC || rm == REG_PC) | |
1942 | { | |
1943 | inst.error = bad_pc; | |
1944 | return; | |
1945 | } | |
1946 | ||
1947 | inst.instruction |= flags; | |
1948 | end_of_line (str); | |
1949 | return; | |
1950 | } | |
1951 | ||
1952 | /* Returns the index into fp_values of a floating point number, or -1 if | |
1953 | not in the table. */ | |
1954 | static int | |
1955 | my_get_float_expression (str) | |
1956 | char ** str; | |
1957 | { | |
1958 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
1959 | char * save_in; | |
1960 | expressionS exp; | |
1961 | int i; | |
1962 | int j; | |
1963 | ||
1964 | memset (words, 0, MAX_LITTLENUMS * sizeof (LITTLENUM_TYPE)); | |
1965 | /* Look for a raw floating point number */ | |
1966 | if ((save_in = atof_ieee (*str, 'x', words)) != NULL | |
1967 | && (is_end_of_line [(int)(*save_in)] || *save_in == '\0')) | |
1968 | { | |
1969 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
1970 | { | |
1971 | for (j = 0; j < MAX_LITTLENUMS; j++) | |
1972 | { | |
1973 | if (words[j] != fp_values[i][j]) | |
1974 | break; | |
1975 | } | |
1976 | ||
1977 | if (j == MAX_LITTLENUMS) | |
1978 | { | |
1979 | *str = save_in; | |
1980 | return i; | |
1981 | } | |
1982 | } | |
1983 | } | |
1984 | ||
1985 | /* Try and parse a more complex expression, this will probably fail | |
1986 | unless the code uses a floating point prefix (eg "0f") */ | |
1987 | save_in = input_line_pointer; | |
1988 | input_line_pointer = *str; | |
1989 | if (expression (&exp) == absolute_section | |
1990 | && exp.X_op == O_big | |
1991 | && exp.X_add_number < 0) | |
1992 | { | |
1993 | /* FIXME: 5 = X_PRECISION, should be #define'd where we can use it. | |
1994 | Ditto for 15. */ | |
1995 | if (gen_to_words (words, 5, (long)15) == 0) | |
1996 | { | |
1997 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
1998 | { | |
1999 | for (j = 0; j < MAX_LITTLENUMS; j++) | |
2000 | { | |
2001 | if (words[j] != fp_values[i][j]) | |
2002 | break; | |
2003 | } | |
2004 | ||
2005 | if (j == MAX_LITTLENUMS) | |
2006 | { | |
2007 | *str = input_line_pointer; | |
2008 | input_line_pointer = save_in; | |
2009 | return i; | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | *str = input_line_pointer; | |
2016 | input_line_pointer = save_in; | |
2017 | return -1; | |
2018 | } | |
2019 | ||
2020 | /* Return true if anything in the expression is a bignum */ | |
2021 | static int | |
2022 | walk_no_bignums (sp) | |
2023 | symbolS * sp; | |
2024 | { | |
174419c1 | 2025 | if (symbol_get_value_expression (sp)->X_op == O_big) |
252b5132 RH |
2026 | return 1; |
2027 | ||
174419c1 | 2028 | if (symbol_get_value_expression (sp)->X_add_symbol) |
252b5132 | 2029 | { |
174419c1 ILT |
2030 | return (walk_no_bignums (symbol_get_value_expression (sp)->X_add_symbol) |
2031 | || (symbol_get_value_expression (sp)->X_op_symbol | |
2032 | && walk_no_bignums (symbol_get_value_expression (sp)->X_op_symbol))); | |
252b5132 RH |
2033 | } |
2034 | ||
2035 | return 0; | |
2036 | } | |
2037 | ||
2038 | static int | |
2039 | my_get_expression (ep, str) | |
2040 | expressionS * ep; | |
2041 | char ** str; | |
2042 | { | |
2043 | char * save_in; | |
2044 | segT seg; | |
2045 | ||
2046 | save_in = input_line_pointer; | |
2047 | input_line_pointer = *str; | |
2048 | seg = expression (ep); | |
2049 | ||
2050 | #ifdef OBJ_AOUT | |
2051 | if (seg != absolute_section | |
2052 | && seg != text_section | |
2053 | && seg != data_section | |
2054 | && seg != bss_section | |
2055 | && seg != undefined_section) | |
2056 | { | |
2057 | inst.error = _("bad_segment"); | |
2058 | *str = input_line_pointer; | |
2059 | input_line_pointer = save_in; | |
2060 | return 1; | |
2061 | } | |
2062 | #endif | |
2063 | ||
2064 | /* Get rid of any bignums now, so that we don't generate an error for which | |
2065 | we can't establish a line number later on. Big numbers are never valid | |
2066 | in instructions, which is where this routine is always called. */ | |
2067 | if (ep->X_op == O_big | |
2068 | || (ep->X_add_symbol | |
2069 | && (walk_no_bignums (ep->X_add_symbol) | |
2070 | || (ep->X_op_symbol | |
2071 | && walk_no_bignums (ep->X_op_symbol))))) | |
2072 | { | |
2073 | inst.error = _("Invalid constant"); | |
2074 | *str = input_line_pointer; | |
2075 | input_line_pointer = save_in; | |
2076 | return 1; | |
2077 | } | |
2078 | ||
2079 | *str = input_line_pointer; | |
2080 | input_line_pointer = save_in; | |
2081 | return 0; | |
2082 | } | |
2083 | ||
2084 | /* unrestrict should be one if <shift> <register> is permitted for this | |
2085 | instruction */ | |
2086 | ||
2087 | static int | |
2088 | decode_shift (str, unrestrict) | |
2089 | char ** str; | |
2090 | int unrestrict; | |
2091 | { | |
2092 | struct asm_shift * shft; | |
2093 | char * p; | |
2094 | char c; | |
2095 | ||
2096 | while (**str == ' ') | |
2097 | (*str)++; | |
2098 | ||
2099 | for (p = *str; isalpha (*p); p++) | |
2100 | ; | |
2101 | ||
2102 | if (p == *str) | |
2103 | { | |
2104 | inst.error = _("Shift expression expected"); | |
2105 | return FAIL; | |
2106 | } | |
2107 | ||
2108 | c = *p; | |
2109 | *p = '\0'; | |
2110 | shft = (struct asm_shift *) hash_find (arm_shift_hsh, *str); | |
2111 | *p = c; | |
2112 | if (shft) | |
2113 | { | |
2114 | if (!strncmp (*str, "rrx", 3) | |
2115 | || !strncmp (*str, "RRX", 3)) | |
2116 | { | |
2117 | *str = p; | |
2118 | inst.instruction |= shft->value; | |
2119 | return SUCCESS; | |
2120 | } | |
2121 | ||
2122 | while (*p == ' ') | |
2123 | p++; | |
2124 | ||
2125 | if (unrestrict && reg_required_here (&p, 8) != FAIL) | |
2126 | { | |
2127 | inst.instruction |= shft->value | SHIFT_BY_REG; | |
2128 | *str = p; | |
2129 | return SUCCESS; | |
2130 | } | |
2131 | else if (is_immediate_prefix (* p)) | |
2132 | { | |
2133 | inst.error = NULL; | |
2134 | p++; | |
2135 | if (my_get_expression (&inst.reloc.exp, &p)) | |
2136 | return FAIL; | |
2137 | ||
2138 | /* Validate some simple #expressions */ | |
2139 | if (inst.reloc.exp.X_op == O_constant) | |
2140 | { | |
2141 | unsigned num = inst.reloc.exp.X_add_number; | |
2142 | ||
2143 | /* Reject operations greater than 32, or lsl #32 */ | |
2144 | if (num > 32 || (num == 32 && shft->value == 0)) | |
2145 | { | |
2146 | inst.error = _("Invalid immediate shift"); | |
2147 | return FAIL; | |
2148 | } | |
2149 | ||
2150 | /* Shifts of zero should be converted to lsl (which is zero)*/ | |
2151 | if (num == 0) | |
2152 | { | |
2153 | *str = p; | |
2154 | return SUCCESS; | |
2155 | } | |
2156 | ||
2157 | /* Shifts of 32 are encoded as 0, for those shifts that | |
2158 | support it. */ | |
2159 | if (num == 32) | |
2160 | num = 0; | |
2161 | ||
2162 | inst.instruction |= (num << 7) | shft->value; | |
2163 | *str = p; | |
2164 | return SUCCESS; | |
2165 | } | |
2166 | ||
2167 | inst.reloc.type = BFD_RELOC_ARM_SHIFT_IMM; | |
2168 | inst.reloc.pc_rel = 0; | |
2169 | inst.instruction |= shft->value; | |
2170 | *str = p; | |
2171 | return SUCCESS; | |
2172 | } | |
2173 | else | |
2174 | { | |
2175 | inst.error = unrestrict ? _("shift requires register or #expression") | |
2176 | : _("shift requires #expression"); | |
2177 | *str = p; | |
2178 | return FAIL; | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | inst.error = _("Shift expression expected"); | |
2183 | return FAIL; | |
2184 | } | |
2185 | ||
2186 | /* Do those data_ops which can take a negative immediate constant */ | |
2187 | /* by altering the instuction. A bit of a hack really */ | |
2188 | /* MOV <-> MVN | |
2189 | AND <-> BIC | |
2190 | ADC <-> SBC | |
2191 | by inverting the second operand, and | |
2192 | ADD <-> SUB | |
2193 | CMP <-> CMN | |
2194 | by negating the second operand. | |
2195 | */ | |
2196 | static int | |
2197 | negate_data_op (instruction, value) | |
2198 | unsigned long * instruction; | |
2199 | unsigned long value; | |
2200 | { | |
2201 | int op, new_inst; | |
2202 | unsigned long negated, inverted; | |
2203 | ||
2204 | negated = validate_immediate (-value); | |
2205 | inverted = validate_immediate (~value); | |
2206 | ||
2207 | op = (*instruction >> DATA_OP_SHIFT) & 0xf; | |
2208 | switch (op) | |
2209 | { | |
2210 | /* First negates */ | |
2211 | case OPCODE_SUB: /* ADD <-> SUB */ | |
2212 | new_inst = OPCODE_ADD; | |
2213 | value = negated; | |
2214 | break; | |
2215 | ||
2216 | case OPCODE_ADD: | |
2217 | new_inst = OPCODE_SUB; | |
2218 | value = negated; | |
2219 | break; | |
2220 | ||
2221 | case OPCODE_CMP: /* CMP <-> CMN */ | |
2222 | new_inst = OPCODE_CMN; | |
2223 | value = negated; | |
2224 | break; | |
2225 | ||
2226 | case OPCODE_CMN: | |
2227 | new_inst = OPCODE_CMP; | |
2228 | value = negated; | |
2229 | break; | |
2230 | ||
2231 | /* Now Inverted ops */ | |
2232 | case OPCODE_MOV: /* MOV <-> MVN */ | |
2233 | new_inst = OPCODE_MVN; | |
2234 | value = inverted; | |
2235 | break; | |
2236 | ||
2237 | case OPCODE_MVN: | |
2238 | new_inst = OPCODE_MOV; | |
2239 | value = inverted; | |
2240 | break; | |
2241 | ||
2242 | case OPCODE_AND: /* AND <-> BIC */ | |
2243 | new_inst = OPCODE_BIC; | |
2244 | value = inverted; | |
2245 | break; | |
2246 | ||
2247 | case OPCODE_BIC: | |
2248 | new_inst = OPCODE_AND; | |
2249 | value = inverted; | |
2250 | break; | |
2251 | ||
2252 | case OPCODE_ADC: /* ADC <-> SBC */ | |
2253 | new_inst = OPCODE_SBC; | |
2254 | value = inverted; | |
2255 | break; | |
2256 | ||
2257 | case OPCODE_SBC: | |
2258 | new_inst = OPCODE_ADC; | |
2259 | value = inverted; | |
2260 | break; | |
2261 | ||
2262 | /* We cannot do anything */ | |
2263 | default: | |
2264 | return FAIL; | |
2265 | } | |
2266 | ||
2267 | if (value == FAIL) | |
2268 | return FAIL; | |
2269 | ||
2270 | *instruction &= OPCODE_MASK; | |
2271 | *instruction |= new_inst << DATA_OP_SHIFT; | |
2272 | return value; | |
2273 | } | |
2274 | ||
2275 | static int | |
2276 | data_op2 (str) | |
2277 | char ** str; | |
2278 | { | |
2279 | int value; | |
2280 | expressionS expr; | |
2281 | ||
2282 | while (**str == ' ') | |
2283 | (*str)++; | |
2284 | ||
2285 | if (reg_required_here (str, 0) != FAIL) | |
2286 | { | |
2287 | if (skip_past_comma (str) == SUCCESS) | |
2288 | { | |
2289 | /* Shift operation on register */ | |
2290 | return decode_shift (str, NO_SHIFT_RESTRICT); | |
2291 | } | |
2292 | return SUCCESS; | |
2293 | } | |
2294 | else | |
2295 | { | |
2296 | /* Immediate expression */ | |
2297 | if (is_immediate_prefix (**str)) | |
2298 | { | |
2299 | (*str)++; | |
2300 | inst.error = NULL; | |
2301 | if (my_get_expression (&inst.reloc.exp, str)) | |
2302 | return FAIL; | |
2303 | ||
2304 | if (inst.reloc.exp.X_add_symbol) | |
2305 | { | |
2306 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
2307 | inst.reloc.pc_rel = 0; | |
2308 | } | |
2309 | else | |
2310 | { | |
2311 | if (skip_past_comma (str) == SUCCESS) | |
2312 | { | |
2313 | /* #x, y -- ie explicit rotation by Y */ | |
2314 | if (my_get_expression (&expr, str)) | |
2315 | return FAIL; | |
2316 | ||
2317 | if (expr.X_op != O_constant) | |
2318 | { | |
2319 | inst.error = _("Constant expression expected"); | |
2320 | return FAIL; | |
2321 | } | |
2322 | ||
2323 | /* Rotate must be a multiple of 2 */ | |
2324 | if (((unsigned) expr.X_add_number) > 30 | |
2325 | || (expr.X_add_number & 1) != 0 | |
2326 | || ((unsigned) inst.reloc.exp.X_add_number) > 255) | |
2327 | { | |
2328 | inst.error = _("Invalid constant"); | |
2329 | return FAIL; | |
2330 | } | |
2331 | inst.instruction |= INST_IMMEDIATE; | |
2332 | inst.instruction |= inst.reloc.exp.X_add_number; | |
2333 | inst.instruction |= expr.X_add_number << 7; | |
2334 | return SUCCESS; | |
2335 | } | |
2336 | ||
2337 | /* Implicit rotation, select a suitable one */ | |
2338 | value = validate_immediate (inst.reloc.exp.X_add_number); | |
2339 | ||
2340 | if (value == FAIL) | |
2341 | { | |
2342 | /* Can't be done, perhaps the code reads something like | |
2343 | "add Rd, Rn, #-n", where "sub Rd, Rn, #n" would be ok */ | |
2344 | if ((value = negate_data_op (&inst.instruction, | |
2345 | inst.reloc.exp.X_add_number)) | |
2346 | == FAIL) | |
2347 | { | |
2348 | inst.error = _("Invalid constant"); | |
2349 | return FAIL; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | inst.instruction |= value; | |
2354 | } | |
2355 | ||
2356 | inst.instruction |= INST_IMMEDIATE; | |
2357 | return SUCCESS; | |
2358 | } | |
2359 | ||
2360 | (*str)++; | |
2361 | inst.error = _("Register or shift expression expected"); | |
2362 | return FAIL; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | static int | |
2367 | fp_op2 (str) | |
2368 | char ** str; | |
2369 | { | |
2370 | while (**str == ' ') | |
2371 | (*str)++; | |
2372 | ||
2373 | if (fp_reg_required_here (str, 0) != FAIL) | |
2374 | return SUCCESS; | |
2375 | else | |
2376 | { | |
2377 | /* Immediate expression */ | |
2378 | if (*((*str)++) == '#') | |
2379 | { | |
2380 | int i; | |
2381 | ||
2382 | inst.error = NULL; | |
2383 | while (**str == ' ') | |
2384 | (*str)++; | |
2385 | ||
2386 | /* First try and match exact strings, this is to guarantee that | |
2387 | some formats will work even for cross assembly */ | |
2388 | ||
2389 | for (i = 0; fp_const[i]; i++) | |
2390 | { | |
2391 | if (strncmp (*str, fp_const[i], strlen (fp_const[i])) == 0) | |
2392 | { | |
2393 | char *start = *str; | |
2394 | ||
2395 | *str += strlen (fp_const[i]); | |
2396 | if (is_end_of_line[(int)**str] || **str == '\0') | |
2397 | { | |
2398 | inst.instruction |= i + 8; | |
2399 | return SUCCESS; | |
2400 | } | |
2401 | *str = start; | |
2402 | } | |
2403 | } | |
2404 | ||
2405 | /* Just because we didn't get a match doesn't mean that the | |
2406 | constant isn't valid, just that it is in a format that we | |
2407 | don't automatically recognize. Try parsing it with | |
2408 | the standard expression routines. */ | |
2409 | if ((i = my_get_float_expression (str)) >= 0) | |
2410 | { | |
2411 | inst.instruction |= i + 8; | |
2412 | return SUCCESS; | |
2413 | } | |
2414 | ||
2415 | inst.error = _("Invalid floating point immediate expression"); | |
2416 | return FAIL; | |
2417 | } | |
2418 | inst.error = _("Floating point register or immediate expression expected"); | |
2419 | return FAIL; | |
2420 | } | |
2421 | } | |
2422 | ||
2423 | static void | |
2424 | do_arit (str, flags) | |
2425 | char * str; | |
2426 | unsigned long flags; | |
2427 | { | |
2428 | while (*str == ' ') | |
2429 | str++; | |
2430 | ||
2431 | if (reg_required_here (&str, 12) == FAIL | |
2432 | || skip_past_comma (&str) == FAIL | |
2433 | || reg_required_here (&str, 16) == FAIL | |
2434 | || skip_past_comma (&str) == FAIL | |
2435 | || data_op2 (&str) == FAIL) | |
2436 | { | |
2437 | if (!inst.error) | |
2438 | inst.error = bad_args; | |
2439 | return; | |
2440 | } | |
2441 | ||
2442 | inst.instruction |= flags; | |
2443 | end_of_line (str); | |
2444 | return; | |
2445 | } | |
2446 | ||
2447 | static void | |
2448 | do_adr (str, flags) | |
2449 | char * str; | |
2450 | unsigned long flags; | |
2451 | { | |
2452 | /* This is a pseudo-op of the form "adr rd, label" to be converted | |
2453 | into a relative address of the form "add rd, pc, #label-.-8" */ | |
2454 | ||
2455 | while (*str == ' ') | |
2456 | str++; | |
2457 | ||
2458 | if (reg_required_here (&str, 12) == FAIL | |
2459 | || skip_past_comma (&str) == FAIL | |
2460 | || my_get_expression (&inst.reloc.exp, &str)) | |
2461 | { | |
2462 | if (!inst.error) | |
2463 | inst.error = bad_args; | |
2464 | return; | |
2465 | } | |
2466 | /* Frag hacking will turn this into a sub instruction if the offset turns | |
2467 | out to be negative. */ | |
2468 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
2469 | inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */ | |
2470 | inst.reloc.pc_rel = 1; | |
2471 | inst.instruction |= flags; | |
2472 | end_of_line (str); | |
2473 | return; | |
2474 | } | |
2475 | ||
2476 | static void | |
2477 | do_cmp (str, flags) | |
2478 | char * str; | |
2479 | unsigned long flags; | |
2480 | { | |
2481 | while (*str == ' ') | |
2482 | str++; | |
2483 | ||
2484 | if (reg_required_here (&str, 16) == FAIL) | |
2485 | { | |
2486 | if (!inst.error) | |
2487 | inst.error = bad_args; | |
2488 | return; | |
2489 | } | |
2490 | ||
2491 | if (skip_past_comma (&str) == FAIL | |
2492 | || data_op2 (&str) == FAIL) | |
2493 | { | |
2494 | if (!inst.error) | |
2495 | inst.error = bad_args; | |
2496 | return; | |
2497 | } | |
2498 | ||
2499 | inst.instruction |= flags; | |
2500 | if ((flags & 0x0000f000) == 0) | |
2501 | inst.instruction |= CONDS_BIT; | |
2502 | ||
2503 | end_of_line (str); | |
2504 | return; | |
2505 | } | |
2506 | ||
2507 | static void | |
2508 | do_mov (str, flags) | |
2509 | char * str; | |
2510 | unsigned long flags; | |
2511 | { | |
2512 | while (*str == ' ') | |
2513 | str++; | |
2514 | ||
2515 | if (reg_required_here (&str, 12) == FAIL) | |
2516 | { | |
2517 | if (!inst.error) | |
2518 | inst.error = bad_args; | |
2519 | return; | |
2520 | } | |
2521 | ||
2522 | if (skip_past_comma (&str) == FAIL | |
2523 | || data_op2 (&str) == FAIL) | |
2524 | { | |
2525 | if (!inst.error) | |
2526 | inst.error = bad_args; | |
2527 | return; | |
2528 | } | |
2529 | ||
2530 | inst.instruction |= flags; | |
2531 | end_of_line (str); | |
2532 | return; | |
2533 | } | |
2534 | ||
2535 | static int | |
2536 | ldst_extend (str, hwse) | |
2537 | char ** str; | |
2538 | int hwse; | |
2539 | { | |
2540 | int add = INDEX_UP; | |
2541 | ||
2542 | switch (**str) | |
2543 | { | |
2544 | case '#': | |
2545 | case '$': | |
2546 | (*str)++; | |
2547 | if (my_get_expression (& inst.reloc.exp, str)) | |
2548 | return FAIL; | |
2549 | ||
2550 | if (inst.reloc.exp.X_op == O_constant) | |
2551 | { | |
2552 | int value = inst.reloc.exp.X_add_number; | |
2553 | ||
2554 | if ((hwse && (value < -255 || value > 255)) | |
2555 | || (value < -4095 || value > 4095)) | |
2556 | { | |
2557 | inst.error = _("address offset too large"); | |
2558 | return FAIL; | |
2559 | } | |
2560 | ||
2561 | if (value < 0) | |
2562 | { | |
2563 | value = -value; | |
2564 | add = 0; | |
2565 | } | |
2566 | ||
2567 | /* Halfword and signextension instructions have the | |
2568 | immediate value split across bits 11..8 and bits 3..0 */ | |
2569 | if (hwse) | |
2570 | inst.instruction |= add | HWOFFSET_IMM | (value >> 4) << 8 | value & 0xF; | |
2571 | else | |
2572 | inst.instruction |= add | value; | |
2573 | } | |
2574 | else | |
2575 | { | |
2576 | if (hwse) | |
2577 | { | |
2578 | inst.instruction |= HWOFFSET_IMM; | |
2579 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; | |
2580 | } | |
2581 | else | |
2582 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; | |
2583 | inst.reloc.pc_rel = 0; | |
2584 | } | |
2585 | return SUCCESS; | |
2586 | ||
2587 | case '-': | |
2588 | add = 0; /* and fall through */ | |
2589 | case '+': | |
2590 | (*str)++; /* and fall through */ | |
2591 | default: | |
2592 | if (reg_required_here (str, 0) == FAIL) | |
2593 | return FAIL; | |
2594 | ||
2595 | if (hwse) | |
2596 | inst.instruction |= add; | |
2597 | else | |
2598 | { | |
2599 | inst.instruction |= add | OFFSET_REG; | |
2600 | if (skip_past_comma (str) == SUCCESS) | |
2601 | return decode_shift (str, SHIFT_RESTRICT); | |
2602 | } | |
2603 | ||
2604 | return SUCCESS; | |
2605 | } | |
2606 | } | |
2607 | ||
2608 | static void | |
2609 | do_ldst (str, flags) | |
2610 | char * str; | |
2611 | unsigned long flags; | |
2612 | { | |
2613 | int halfword = 0; | |
2614 | int pre_inc = 0; | |
2615 | int conflict_reg; | |
2616 | int value; | |
2617 | ||
2618 | /* This is not ideal, but it is the simplest way of dealing with the | |
2619 | ARM7T halfword instructions (since they use a different | |
2620 | encoding, but the same mnemonic): */ | |
2621 | if (halfword = ((flags & 0x80000000) != 0)) | |
2622 | { | |
2623 | /* This is actually a load/store of a halfword, or a | |
2624 | signed-extension load */ | |
2625 | if ((cpu_variant & ARM_HALFWORD) == 0) | |
2626 | { | |
2627 | inst.error | |
2628 | = _("Processor does not support halfwords or signed bytes"); | |
2629 | return; | |
2630 | } | |
2631 | ||
2632 | inst.instruction = (inst.instruction & COND_MASK) | |
2633 | | (flags & ~COND_MASK); | |
2634 | ||
2635 | flags = 0; | |
2636 | } | |
2637 | ||
2638 | while (*str == ' ') | |
2639 | str++; | |
2640 | ||
2641 | if ((conflict_reg = reg_required_here (& str, 12)) == FAIL) | |
2642 | { | |
2643 | if (!inst.error) | |
2644 | inst.error = bad_args; | |
2645 | return; | |
2646 | } | |
2647 | ||
2648 | if (skip_past_comma (& str) == FAIL) | |
2649 | { | |
2650 | inst.error = _("Address expected"); | |
2651 | return; | |
2652 | } | |
2653 | ||
2654 | if (*str == '[') | |
2655 | { | |
2656 | int reg; | |
2657 | ||
2658 | str++; | |
2659 | while (*str == ' ') | |
2660 | str++; | |
2661 | ||
2662 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
2663 | return; | |
2664 | ||
2665 | conflict_reg = (((conflict_reg == reg) | |
2666 | && (inst.instruction & LOAD_BIT)) | |
2667 | ? 1 : 0); | |
2668 | ||
2669 | while (*str == ' ') | |
2670 | str++; | |
2671 | ||
2672 | if (*str == ']') | |
2673 | { | |
2674 | str++; | |
2675 | if (skip_past_comma (&str) == SUCCESS) | |
2676 | { | |
2677 | /* [Rn],... (post inc) */ | |
2678 | if (ldst_extend (&str, halfword) == FAIL) | |
2679 | return; | |
2680 | if (conflict_reg) | |
2681 | as_warn (_("destination register same as write-back base\n")); | |
2682 | } | |
2683 | else | |
2684 | { | |
2685 | /* [Rn] */ | |
2686 | if (halfword) | |
2687 | inst.instruction |= HWOFFSET_IMM; | |
2688 | ||
2689 | while (*str == ' ') | |
2690 | str++; | |
2691 | ||
2692 | if (*str == '!') | |
2693 | { | |
2694 | if (conflict_reg) | |
2695 | as_warn (_("destination register same as write-back base\n")); | |
2696 | str++; | |
2697 | inst.instruction |= WRITE_BACK; | |
2698 | } | |
2699 | ||
2700 | flags |= INDEX_UP; | |
2701 | if (! (flags & TRANS_BIT)) | |
2702 | pre_inc = 1; | |
2703 | } | |
2704 | } | |
2705 | else | |
2706 | { | |
2707 | /* [Rn,...] */ | |
2708 | if (skip_past_comma (&str) == FAIL) | |
2709 | { | |
2710 | inst.error = _("pre-indexed expression expected"); | |
2711 | return; | |
2712 | } | |
2713 | ||
2714 | pre_inc = 1; | |
2715 | if (ldst_extend (&str, halfword) == FAIL) | |
2716 | return; | |
2717 | ||
2718 | while (*str == ' ') | |
2719 | str++; | |
2720 | ||
2721 | if (*str++ != ']') | |
2722 | { | |
2723 | inst.error = _("missing ]"); | |
2724 | return; | |
2725 | } | |
2726 | ||
2727 | while (*str == ' ') | |
2728 | str++; | |
2729 | ||
2730 | if (*str == '!') | |
2731 | { | |
2732 | if (conflict_reg) | |
2733 | as_tsktsk (_("destination register same as write-back base\n")); | |
2734 | str++; | |
2735 | inst.instruction |= WRITE_BACK; | |
2736 | } | |
2737 | } | |
2738 | } | |
2739 | else if (*str == '=') | |
2740 | { | |
2741 | /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ | |
2742 | str++; | |
2743 | ||
2744 | while (*str == ' ') | |
2745 | str++; | |
2746 | ||
2747 | if (my_get_expression (&inst.reloc.exp, &str)) | |
2748 | return; | |
2749 | ||
2750 | if (inst.reloc.exp.X_op != O_constant | |
2751 | && inst.reloc.exp.X_op != O_symbol) | |
2752 | { | |
2753 | inst.error = _("Constant expression expected"); | |
2754 | return; | |
2755 | } | |
2756 | ||
2757 | if (inst.reloc.exp.X_op == O_constant | |
2758 | && (value = validate_immediate(inst.reloc.exp.X_add_number)) != FAIL) | |
2759 | { | |
2760 | /* This can be done with a mov instruction */ | |
2761 | inst.instruction &= LITERAL_MASK; | |
2762 | inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT); | |
2763 | inst.instruction |= (flags & COND_MASK) | (value & 0xfff); | |
2764 | end_of_line(str); | |
2765 | return; | |
2766 | } | |
2767 | else | |
2768 | { | |
2769 | /* Insert into literal pool */ | |
2770 | if (add_to_lit_pool () == FAIL) | |
2771 | { | |
2772 | if (!inst.error) | |
2773 | inst.error = _("literal pool insertion failed"); | |
2774 | return; | |
2775 | } | |
2776 | ||
2777 | /* Change the instruction exp to point to the pool */ | |
2778 | if (halfword) | |
2779 | { | |
2780 | inst.instruction |= HWOFFSET_IMM; | |
2781 | inst.reloc.type = BFD_RELOC_ARM_HWLITERAL; | |
2782 | } | |
2783 | else | |
2784 | inst.reloc.type = BFD_RELOC_ARM_LITERAL; | |
2785 | inst.reloc.pc_rel = 1; | |
2786 | inst.instruction |= (REG_PC << 16); | |
2787 | pre_inc = 1; | |
2788 | } | |
2789 | } | |
2790 | else | |
2791 | { | |
2792 | if (my_get_expression (&inst.reloc.exp, &str)) | |
2793 | return; | |
2794 | ||
2795 | if (halfword) | |
2796 | { | |
2797 | inst.instruction |= HWOFFSET_IMM; | |
2798 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; | |
2799 | } | |
2800 | else | |
2801 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; | |
2802 | inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ | |
2803 | inst.reloc.pc_rel = 1; | |
2804 | inst.instruction |= (REG_PC << 16); | |
2805 | pre_inc = 1; | |
2806 | } | |
2807 | ||
2808 | if (pre_inc && (flags & TRANS_BIT)) | |
2809 | inst.error = _("Pre-increment instruction with translate"); | |
2810 | ||
2811 | inst.instruction |= flags | (pre_inc ? PRE_INDEX : 0); | |
2812 | end_of_line (str); | |
2813 | return; | |
2814 | } | |
2815 | ||
2816 | static long | |
2817 | reg_list (strp) | |
2818 | char ** strp; | |
2819 | { | |
2820 | char * str = *strp; | |
2821 | long range = 0; | |
2822 | int another_range; | |
2823 | ||
2824 | /* We come back here if we get ranges concatenated by '+' or '|' */ | |
2825 | do | |
2826 | { | |
2827 | another_range = 0; | |
2828 | ||
2829 | if (*str == '{') | |
2830 | { | |
2831 | int in_range = 0; | |
2832 | int cur_reg = -1; | |
2833 | ||
2834 | str++; | |
2835 | do | |
2836 | { | |
2837 | int reg; | |
2838 | ||
2839 | while (*str == ' ') | |
2840 | str++; | |
2841 | ||
2842 | if ((reg = reg_required_here (& str, -1)) == FAIL) | |
2843 | return FAIL; | |
2844 | ||
2845 | if (in_range) | |
2846 | { | |
2847 | int i; | |
2848 | ||
2849 | if (reg <= cur_reg) | |
2850 | { | |
2851 | inst.error = _("Bad range in register list"); | |
2852 | return FAIL; | |
2853 | } | |
2854 | ||
2855 | for (i = cur_reg + 1; i < reg; i++) | |
2856 | { | |
2857 | if (range & (1 << i)) | |
2858 | as_tsktsk | |
2859 | (_("Warning: Duplicated register (r%d) in register list"), | |
2860 | i); | |
2861 | else | |
2862 | range |= 1 << i; | |
2863 | } | |
2864 | in_range = 0; | |
2865 | } | |
2866 | ||
2867 | if (range & (1 << reg)) | |
2868 | as_tsktsk (_("Warning: Duplicated register (r%d) in register list"), | |
2869 | reg); | |
2870 | else if (reg <= cur_reg) | |
2871 | as_tsktsk (_("Warning: Register range not in ascending order")); | |
2872 | ||
2873 | range |= 1 << reg; | |
2874 | cur_reg = reg; | |
2875 | } while (skip_past_comma (&str) != FAIL | |
2876 | || (in_range = 1, *str++ == '-')); | |
2877 | str--; | |
2878 | while (*str == ' ') | |
2879 | str++; | |
2880 | ||
2881 | if (*str++ != '}') | |
2882 | { | |
2883 | inst.error = _("Missing `}'"); | |
2884 | return FAIL; | |
2885 | } | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | expressionS expr; | |
2890 | ||
2891 | if (my_get_expression (&expr, &str)) | |
2892 | return FAIL; | |
2893 | ||
2894 | if (expr.X_op == O_constant) | |
2895 | { | |
2896 | if (expr.X_add_number | |
2897 | != (expr.X_add_number & 0x0000ffff)) | |
2898 | { | |
2899 | inst.error = _("invalid register mask"); | |
2900 | return FAIL; | |
2901 | } | |
2902 | ||
2903 | if ((range & expr.X_add_number) != 0) | |
2904 | { | |
2905 | int regno = range & expr.X_add_number; | |
2906 | ||
2907 | regno &= -regno; | |
2908 | regno = (1 << regno) - 1; | |
2909 | as_tsktsk | |
2910 | (_("Warning: Duplicated register (r%d) in register list"), | |
2911 | regno); | |
2912 | } | |
2913 | ||
2914 | range |= expr.X_add_number; | |
2915 | } | |
2916 | else | |
2917 | { | |
2918 | if (inst.reloc.type != 0) | |
2919 | { | |
2920 | inst.error = _("expression too complex"); | |
2921 | return FAIL; | |
2922 | } | |
2923 | ||
2924 | memcpy (&inst.reloc.exp, &expr, sizeof (expressionS)); | |
2925 | inst.reloc.type = BFD_RELOC_ARM_MULTI; | |
2926 | inst.reloc.pc_rel = 0; | |
2927 | } | |
2928 | } | |
2929 | ||
2930 | while (*str == ' ') | |
2931 | str++; | |
2932 | ||
2933 | if (*str == '|' || *str == '+') | |
2934 | { | |
2935 | str++; | |
2936 | another_range = 1; | |
2937 | } | |
2938 | } while (another_range); | |
2939 | ||
2940 | *strp = str; | |
2941 | return range; | |
2942 | } | |
2943 | ||
2944 | static void | |
2945 | do_ldmstm (str, flags) | |
2946 | char * str; | |
2947 | unsigned long flags; | |
2948 | { | |
2949 | int base_reg; | |
2950 | long range; | |
2951 | ||
2952 | while (*str == ' ') | |
2953 | str++; | |
2954 | ||
2955 | if ((base_reg = reg_required_here (&str, 16)) == FAIL) | |
2956 | return; | |
2957 | ||
2958 | if (base_reg == REG_PC) | |
2959 | { | |
2960 | inst.error = _("r15 not allowed as base register"); | |
2961 | return; | |
2962 | } | |
2963 | ||
2964 | while (*str == ' ') | |
2965 | str++; | |
2966 | if (*str == '!') | |
2967 | { | |
2968 | flags |= WRITE_BACK; | |
2969 | str++; | |
2970 | } | |
2971 | ||
2972 | if (skip_past_comma (&str) == FAIL | |
2973 | || (range = reg_list (&str)) == FAIL) | |
2974 | { | |
2975 | if (! inst.error) | |
2976 | inst.error = bad_args; | |
2977 | return; | |
2978 | } | |
2979 | ||
2980 | if (*str == '^') | |
2981 | { | |
2982 | str++; | |
2983 | flags |= MULTI_SET_PSR; | |
2984 | } | |
2985 | ||
2986 | inst.instruction |= flags | range; | |
2987 | end_of_line (str); | |
2988 | return; | |
2989 | } | |
2990 | ||
2991 | static void | |
2992 | do_swi (str, flags) | |
2993 | char * str; | |
2994 | unsigned long flags; | |
2995 | { | |
2996 | while (*str == ' ') | |
2997 | str++; | |
2998 | ||
2999 | /* Allow optional leading '#'. */ | |
3000 | if (is_immediate_prefix (*str)) | |
3001 | str++; | |
3002 | ||
3003 | if (my_get_expression (& inst.reloc.exp, & str)) | |
3004 | return; | |
3005 | ||
3006 | inst.reloc.type = BFD_RELOC_ARM_SWI; | |
3007 | inst.reloc.pc_rel = 0; | |
3008 | inst.instruction |= flags; | |
3009 | ||
3010 | end_of_line (str); | |
3011 | ||
3012 | return; | |
3013 | } | |
3014 | ||
3015 | static void | |
3016 | do_swap (str, flags) | |
3017 | char * str; | |
3018 | unsigned long flags; | |
3019 | { | |
3020 | int reg; | |
3021 | ||
3022 | while (*str == ' ') | |
3023 | str++; | |
3024 | ||
3025 | if ((reg = reg_required_here (&str, 12)) == FAIL) | |
3026 | return; | |
3027 | ||
3028 | if (reg == REG_PC) | |
3029 | { | |
3030 | inst.error = _("r15 not allowed in swap"); | |
3031 | return; | |
3032 | } | |
3033 | ||
3034 | if (skip_past_comma (&str) == FAIL | |
3035 | || (reg = reg_required_here (&str, 0)) == FAIL) | |
3036 | { | |
3037 | if (!inst.error) | |
3038 | inst.error = bad_args; | |
3039 | return; | |
3040 | } | |
3041 | ||
3042 | if (reg == REG_PC) | |
3043 | { | |
3044 | inst.error = _("r15 not allowed in swap"); | |
3045 | return; | |
3046 | } | |
3047 | ||
3048 | if (skip_past_comma (&str) == FAIL | |
3049 | || *str++ != '[') | |
3050 | { | |
3051 | inst.error = bad_args; | |
3052 | return; | |
3053 | } | |
3054 | ||
3055 | while (*str == ' ') | |
3056 | str++; | |
3057 | ||
3058 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
3059 | return; | |
3060 | ||
3061 | if (reg == REG_PC) | |
3062 | { | |
3063 | inst.error = bad_pc; | |
3064 | return; | |
3065 | } | |
3066 | ||
3067 | while (*str == ' ') | |
3068 | str++; | |
3069 | ||
3070 | if (*str++ != ']') | |
3071 | { | |
3072 | inst.error = _("missing ]"); | |
3073 | return; | |
3074 | } | |
3075 | ||
3076 | inst.instruction |= flags; | |
3077 | end_of_line (str); | |
3078 | return; | |
3079 | } | |
3080 | ||
3081 | static void | |
3082 | do_branch (str, flags) | |
3083 | char * str; | |
3084 | unsigned long flags; | |
3085 | { | |
3086 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3087 | return; | |
3088 | ||
3089 | #ifdef OBJ_ELF | |
3090 | { | |
3091 | char * save_in; | |
3092 | ||
3093 | /* ScottB: February 5, 1998 */ | |
3094 | /* Check to see of PLT32 reloc required for the instruction. */ | |
3095 | ||
3096 | /* arm_parse_reloc() works on input_line_pointer. | |
3097 | We actually want to parse the operands to the branch instruction | |
3098 | passed in 'str'. Save the input pointer and restore it later. */ | |
3099 | save_in = input_line_pointer; | |
3100 | input_line_pointer = str; | |
3101 | if (inst.reloc.exp.X_op == O_symbol | |
3102 | && *str == '(' | |
3103 | && arm_parse_reloc () == BFD_RELOC_ARM_PLT32) | |
3104 | { | |
3105 | inst.reloc.type = BFD_RELOC_ARM_PLT32; | |
3106 | inst.reloc.pc_rel = 0; | |
3107 | /* Modify str to point to after parsed operands, otherwise | |
3108 | end_of_line() will complain about the (PLT) left in str. */ | |
3109 | str = input_line_pointer; | |
3110 | } | |
3111 | else | |
3112 | { | |
3113 | inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; | |
3114 | inst.reloc.pc_rel = 1; | |
3115 | } | |
3116 | input_line_pointer = save_in; | |
3117 | } | |
3118 | #else | |
3119 | inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; | |
3120 | inst.reloc.pc_rel = 1; | |
3121 | #endif /* OBJ_ELF */ | |
3122 | ||
3123 | end_of_line (str); | |
3124 | return; | |
3125 | } | |
3126 | ||
3127 | static void | |
3128 | do_bx (str, flags) | |
3129 | char * str; | |
3130 | unsigned long flags; | |
3131 | { | |
3132 | int reg; | |
3133 | ||
3134 | while (*str == ' ') | |
3135 | str++; | |
3136 | ||
3137 | if ((reg = reg_required_here (&str, 0)) == FAIL) | |
3138 | return; | |
3139 | ||
3140 | if (reg == REG_PC) | |
3141 | as_tsktsk (_("Use of r15 in bx has undefined behaviour")); | |
3142 | ||
3143 | end_of_line (str); | |
3144 | return; | |
3145 | } | |
3146 | ||
3147 | static void | |
3148 | do_cdp (str, flags) | |
3149 | char * str; | |
3150 | unsigned long flags; | |
3151 | { | |
3152 | /* Co-processor data operation. | |
3153 | Format: CDP{cond} CP#,<expr>,CRd,CRn,CRm{,<expr>} */ | |
3154 | while (*str == ' ') | |
3155 | str++; | |
3156 | ||
3157 | if (co_proc_number (&str) == FAIL) | |
3158 | { | |
3159 | if (!inst.error) | |
3160 | inst.error = bad_args; | |
3161 | return; | |
3162 | } | |
3163 | ||
3164 | if (skip_past_comma (&str) == FAIL | |
3165 | || cp_opc_expr (&str, 20,4) == FAIL) | |
3166 | { | |
3167 | if (!inst.error) | |
3168 | inst.error = bad_args; | |
3169 | return; | |
3170 | } | |
3171 | ||
3172 | if (skip_past_comma (&str) == FAIL | |
3173 | || cp_reg_required_here (&str, 12) == FAIL) | |
3174 | { | |
3175 | if (!inst.error) | |
3176 | inst.error = bad_args; | |
3177 | return; | |
3178 | } | |
3179 | ||
3180 | if (skip_past_comma (&str) == FAIL | |
3181 | || cp_reg_required_here (&str, 16) == FAIL) | |
3182 | { | |
3183 | if (!inst.error) | |
3184 | inst.error = bad_args; | |
3185 | return; | |
3186 | } | |
3187 | ||
3188 | if (skip_past_comma (&str) == FAIL | |
3189 | || cp_reg_required_here (&str, 0) == FAIL) | |
3190 | { | |
3191 | if (!inst.error) | |
3192 | inst.error = bad_args; | |
3193 | return; | |
3194 | } | |
3195 | ||
3196 | if (skip_past_comma (&str) == SUCCESS) | |
3197 | { | |
3198 | if (cp_opc_expr (&str, 5, 3) == FAIL) | |
3199 | { | |
3200 | if (!inst.error) | |
3201 | inst.error = bad_args; | |
3202 | return; | |
3203 | } | |
3204 | } | |
3205 | ||
3206 | end_of_line (str); | |
3207 | return; | |
3208 | } | |
3209 | ||
3210 | static void | |
3211 | do_lstc (str, flags) | |
3212 | char * str; | |
3213 | unsigned long flags; | |
3214 | { | |
3215 | /* Co-processor register load/store. | |
3216 | Format: <LDC|STC{cond}[L] CP#,CRd,<address> */ | |
3217 | ||
3218 | while (*str == ' ') | |
3219 | str++; | |
3220 | ||
3221 | if (co_proc_number (&str) == FAIL) | |
3222 | { | |
3223 | if (!inst.error) | |
3224 | inst.error = bad_args; | |
3225 | return; | |
3226 | } | |
3227 | ||
3228 | if (skip_past_comma (&str) == FAIL | |
3229 | || cp_reg_required_here (&str, 12) == FAIL) | |
3230 | { | |
3231 | if (!inst.error) | |
3232 | inst.error = bad_args; | |
3233 | return; | |
3234 | } | |
3235 | ||
3236 | if (skip_past_comma (&str) == FAIL | |
3237 | || cp_address_required_here (&str) == FAIL) | |
3238 | { | |
3239 | if (! inst.error) | |
3240 | inst.error = bad_args; | |
3241 | return; | |
3242 | } | |
3243 | ||
3244 | inst.instruction |= flags; | |
3245 | end_of_line (str); | |
3246 | return; | |
3247 | } | |
3248 | ||
3249 | static void | |
3250 | do_co_reg (str, flags) | |
3251 | char * str; | |
3252 | unsigned long flags; | |
3253 | { | |
3254 | /* Co-processor register transfer. | |
3255 | Format: <MCR|MRC>{cond} CP#,<expr1>,Rd,CRn,CRm{,<expr2>} */ | |
3256 | ||
3257 | while (*str == ' ') | |
3258 | str++; | |
3259 | ||
3260 | if (co_proc_number (&str) == FAIL) | |
3261 | { | |
3262 | if (!inst.error) | |
3263 | inst.error = bad_args; | |
3264 | return; | |
3265 | } | |
3266 | ||
3267 | if (skip_past_comma (&str) == FAIL | |
3268 | || cp_opc_expr (&str, 21, 3) == FAIL) | |
3269 | { | |
3270 | if (!inst.error) | |
3271 | inst.error = bad_args; | |
3272 | return; | |
3273 | } | |
3274 | ||
3275 | if (skip_past_comma (&str) == FAIL | |
3276 | || reg_required_here (&str, 12) == FAIL) | |
3277 | { | |
3278 | if (!inst.error) | |
3279 | inst.error = bad_args; | |
3280 | return; | |
3281 | } | |
3282 | ||
3283 | if (skip_past_comma (&str) == FAIL | |
3284 | || cp_reg_required_here (&str, 16) == FAIL) | |
3285 | { | |
3286 | if (!inst.error) | |
3287 | inst.error = bad_args; | |
3288 | return; | |
3289 | } | |
3290 | ||
3291 | if (skip_past_comma (&str) == FAIL | |
3292 | || cp_reg_required_here (&str, 0) == FAIL) | |
3293 | { | |
3294 | if (!inst.error) | |
3295 | inst.error = bad_args; | |
3296 | return; | |
3297 | } | |
3298 | ||
3299 | if (skip_past_comma (&str) == SUCCESS) | |
3300 | { | |
3301 | if (cp_opc_expr (&str, 5, 3) == FAIL) | |
3302 | { | |
3303 | if (!inst.error) | |
3304 | inst.error = bad_args; | |
3305 | return; | |
3306 | } | |
3307 | } | |
3308 | ||
3309 | end_of_line (str); | |
3310 | return; | |
3311 | } | |
3312 | ||
3313 | static void | |
3314 | do_fp_ctrl (str, flags) | |
3315 | char * str; | |
3316 | unsigned long flags; | |
3317 | { | |
3318 | /* FP control registers. | |
3319 | Format: <WFS|RFS|WFC|RFC>{cond} Rn */ | |
3320 | ||
3321 | while (*str == ' ') | |
3322 | str++; | |
3323 | ||
3324 | if (reg_required_here (&str, 12) == FAIL) | |
3325 | { | |
3326 | if (!inst.error) | |
3327 | inst.error = bad_args; | |
3328 | return; | |
3329 | } | |
3330 | ||
3331 | end_of_line (str); | |
3332 | return; | |
3333 | } | |
3334 | ||
3335 | static void | |
3336 | do_fp_ldst (str, flags) | |
3337 | char * str; | |
3338 | unsigned long flags; | |
3339 | { | |
3340 | while (*str == ' ') | |
3341 | str++; | |
3342 | ||
3343 | switch (inst.suffix) | |
3344 | { | |
3345 | case SUFF_S: | |
3346 | break; | |
3347 | case SUFF_D: | |
3348 | inst.instruction |= CP_T_X; | |
3349 | break; | |
3350 | case SUFF_E: | |
3351 | inst.instruction |= CP_T_Y; | |
3352 | break; | |
3353 | case SUFF_P: | |
3354 | inst.instruction |= CP_T_X | CP_T_Y; | |
3355 | break; | |
3356 | default: | |
3357 | abort (); | |
3358 | } | |
3359 | ||
3360 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3361 | { | |
3362 | if (!inst.error) | |
3363 | inst.error = bad_args; | |
3364 | return; | |
3365 | } | |
3366 | ||
3367 | if (skip_past_comma (&str) == FAIL | |
3368 | || cp_address_required_here (&str) == FAIL) | |
3369 | { | |
3370 | if (!inst.error) | |
3371 | inst.error = bad_args; | |
3372 | return; | |
3373 | } | |
3374 | ||
3375 | end_of_line (str); | |
3376 | } | |
3377 | ||
3378 | static void | |
3379 | do_fp_ldmstm (str, flags) | |
3380 | char * str; | |
3381 | unsigned long flags; | |
3382 | { | |
3383 | int num_regs; | |
3384 | ||
3385 | while (*str == ' ') | |
3386 | str++; | |
3387 | ||
3388 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3389 | { | |
3390 | if (! inst.error) | |
3391 | inst.error = bad_args; | |
3392 | return; | |
3393 | } | |
3394 | ||
3395 | /* Get Number of registers to transfer */ | |
3396 | if (skip_past_comma (&str) == FAIL | |
3397 | || my_get_expression (&inst.reloc.exp, &str)) | |
3398 | { | |
3399 | if (! inst.error) | |
3400 | inst.error = _("constant expression expected"); | |
3401 | return; | |
3402 | } | |
3403 | ||
3404 | if (inst.reloc.exp.X_op != O_constant) | |
3405 | { | |
3406 | inst.error = _("Constant value required for number of registers"); | |
3407 | return; | |
3408 | } | |
3409 | ||
3410 | num_regs = inst.reloc.exp.X_add_number; | |
3411 | ||
3412 | if (num_regs < 1 || num_regs > 4) | |
3413 | { | |
3414 | inst.error = _("number of registers must be in the range [1:4]"); | |
3415 | return; | |
3416 | } | |
3417 | ||
3418 | switch (num_regs) | |
3419 | { | |
3420 | case 1: | |
3421 | inst.instruction |= CP_T_X; | |
3422 | break; | |
3423 | case 2: | |
3424 | inst.instruction |= CP_T_Y; | |
3425 | break; | |
3426 | case 3: | |
3427 | inst.instruction |= CP_T_Y | CP_T_X; | |
3428 | break; | |
3429 | case 4: | |
3430 | break; | |
3431 | default: | |
3432 | abort (); | |
3433 | } | |
3434 | ||
3435 | if (flags) | |
3436 | { | |
3437 | int reg; | |
3438 | int write_back; | |
3439 | int offset; | |
3440 | ||
3441 | /* The instruction specified "ea" or "fd", so we can only accept | |
3442 | [Rn]{!}. The instruction does not really support stacking or | |
3443 | unstacking, so we have to emulate these by setting appropriate | |
3444 | bits and offsets. */ | |
3445 | if (skip_past_comma (&str) == FAIL | |
3446 | || *str != '[') | |
3447 | { | |
3448 | if (! inst.error) | |
3449 | inst.error = bad_args; | |
3450 | return; | |
3451 | } | |
3452 | ||
3453 | str++; | |
3454 | while (*str == ' ') | |
3455 | str++; | |
3456 | ||
3457 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
3458 | return; | |
3459 | ||
3460 | while (*str == ' ') | |
3461 | str++; | |
3462 | ||
3463 | if (*str != ']') | |
3464 | { | |
3465 | inst.error = bad_args; | |
3466 | return; | |
3467 | } | |
3468 | ||
3469 | str++; | |
3470 | if (*str == '!') | |
3471 | { | |
3472 | write_back = 1; | |
3473 | str++; | |
3474 | if (reg == REG_PC) | |
3475 | { | |
3476 | inst.error = _("R15 not allowed as base register with write-back"); | |
3477 | return; | |
3478 | } | |
3479 | } | |
3480 | else | |
3481 | write_back = 0; | |
3482 | ||
3483 | if (flags & CP_T_Pre) | |
3484 | { | |
3485 | /* Pre-decrement */ | |
3486 | offset = 3 * num_regs; | |
3487 | if (write_back) | |
3488 | flags |= CP_T_WB; | |
3489 | } | |
3490 | else | |
3491 | { | |
3492 | /* Post-increment */ | |
3493 | if (write_back) | |
3494 | { | |
3495 | flags |= CP_T_WB; | |
3496 | offset = 3 * num_regs; | |
3497 | } | |
3498 | else | |
3499 | { | |
3500 | /* No write-back, so convert this into a standard pre-increment | |
3501 | instruction -- aesthetically more pleasing. */ | |
3502 | flags = CP_T_Pre | CP_T_UD; | |
3503 | offset = 0; | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | inst.instruction |= flags | offset; | |
3508 | } | |
3509 | else if (skip_past_comma (&str) == FAIL | |
3510 | || cp_address_required_here (&str) == FAIL) | |
3511 | { | |
3512 | if (! inst.error) | |
3513 | inst.error = bad_args; | |
3514 | return; | |
3515 | } | |
3516 | ||
3517 | end_of_line (str); | |
3518 | } | |
3519 | ||
3520 | static void | |
3521 | do_fp_dyadic (str, flags) | |
3522 | char * str; | |
3523 | unsigned long flags; | |
3524 | { | |
3525 | while (*str == ' ') | |
3526 | str++; | |
3527 | ||
3528 | switch (inst.suffix) | |
3529 | { | |
3530 | case SUFF_S: | |
3531 | break; | |
3532 | case SUFF_D: | |
3533 | inst.instruction |= 0x00000080; | |
3534 | break; | |
3535 | case SUFF_E: | |
3536 | inst.instruction |= 0x00080000; | |
3537 | break; | |
3538 | default: | |
3539 | abort (); | |
3540 | } | |
3541 | ||
3542 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3543 | { | |
3544 | if (! inst.error) | |
3545 | inst.error = bad_args; | |
3546 | return; | |
3547 | } | |
3548 | ||
3549 | if (skip_past_comma (&str) == FAIL | |
3550 | || fp_reg_required_here (&str, 16) == FAIL) | |
3551 | { | |
3552 | if (! inst.error) | |
3553 | inst.error = bad_args; | |
3554 | return; | |
3555 | } | |
3556 | ||
3557 | if (skip_past_comma (&str) == FAIL | |
3558 | || fp_op2 (&str) == FAIL) | |
3559 | { | |
3560 | if (! inst.error) | |
3561 | inst.error = bad_args; | |
3562 | return; | |
3563 | } | |
3564 | ||
3565 | inst.instruction |= flags; | |
3566 | end_of_line (str); | |
3567 | return; | |
3568 | } | |
3569 | ||
3570 | static void | |
3571 | do_fp_monadic (str, flags) | |
3572 | char * str; | |
3573 | unsigned long flags; | |
3574 | { | |
3575 | while (*str == ' ') | |
3576 | str++; | |
3577 | ||
3578 | switch (inst.suffix) | |
3579 | { | |
3580 | case SUFF_S: | |
3581 | break; | |
3582 | case SUFF_D: | |
3583 | inst.instruction |= 0x00000080; | |
3584 | break; | |
3585 | case SUFF_E: | |
3586 | inst.instruction |= 0x00080000; | |
3587 | break; | |
3588 | default: | |
3589 | abort (); | |
3590 | } | |
3591 | ||
3592 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3593 | { | |
3594 | if (! inst.error) | |
3595 | inst.error = bad_args; | |
3596 | return; | |
3597 | } | |
3598 | ||
3599 | if (skip_past_comma (&str) == FAIL | |
3600 | || fp_op2 (&str) == FAIL) | |
3601 | { | |
3602 | if (! inst.error) | |
3603 | inst.error = bad_args; | |
3604 | return; | |
3605 | } | |
3606 | ||
3607 | inst.instruction |= flags; | |
3608 | end_of_line (str); | |
3609 | return; | |
3610 | } | |
3611 | ||
3612 | static void | |
3613 | do_fp_cmp (str, flags) | |
3614 | char * str; | |
3615 | unsigned long flags; | |
3616 | { | |
3617 | while (*str == ' ') | |
3618 | str++; | |
3619 | ||
3620 | if (fp_reg_required_here (&str, 16) == FAIL) | |
3621 | { | |
3622 | if (! inst.error) | |
3623 | inst.error = bad_args; | |
3624 | return; | |
3625 | } | |
3626 | ||
3627 | if (skip_past_comma (&str) == FAIL | |
3628 | || fp_op2 (&str) == FAIL) | |
3629 | { | |
3630 | if (! inst.error) | |
3631 | inst.error = bad_args; | |
3632 | return; | |
3633 | } | |
3634 | ||
3635 | inst.instruction |= flags; | |
3636 | end_of_line (str); | |
3637 | return; | |
3638 | } | |
3639 | ||
3640 | static void | |
3641 | do_fp_from_reg (str, flags) | |
3642 | char * str; | |
3643 | unsigned long flags; | |
3644 | { | |
3645 | while (*str == ' ') | |
3646 | str++; | |
3647 | ||
3648 | switch (inst.suffix) | |
3649 | { | |
3650 | case SUFF_S: | |
3651 | break; | |
3652 | case SUFF_D: | |
3653 | inst.instruction |= 0x00000080; | |
3654 | break; | |
3655 | case SUFF_E: | |
3656 | inst.instruction |= 0x00080000; | |
3657 | break; | |
3658 | default: | |
3659 | abort (); | |
3660 | } | |
3661 | ||
3662 | if (fp_reg_required_here (&str, 16) == FAIL) | |
3663 | { | |
3664 | if (! inst.error) | |
3665 | inst.error = bad_args; | |
3666 | return; | |
3667 | } | |
3668 | ||
3669 | if (skip_past_comma (&str) == FAIL | |
3670 | || reg_required_here (&str, 12) == FAIL) | |
3671 | { | |
3672 | if (! inst.error) | |
3673 | inst.error = bad_args; | |
3674 | return; | |
3675 | } | |
3676 | ||
3677 | inst.instruction |= flags; | |
3678 | end_of_line (str); | |
3679 | return; | |
3680 | } | |
3681 | ||
3682 | static void | |
3683 | do_fp_to_reg (str, flags) | |
3684 | char * str; | |
3685 | unsigned long flags; | |
3686 | { | |
3687 | while (*str == ' ') | |
3688 | str++; | |
3689 | ||
3690 | if (reg_required_here (&str, 12) == FAIL) | |
3691 | return; | |
3692 | ||
3693 | if (skip_past_comma (&str) == FAIL | |
3694 | || fp_reg_required_here (&str, 0) == FAIL) | |
3695 | { | |
3696 | if (! inst.error) | |
3697 | inst.error = bad_args; | |
3698 | return; | |
3699 | } | |
3700 | ||
3701 | inst.instruction |= flags; | |
3702 | end_of_line (str); | |
3703 | return; | |
3704 | } | |
3705 | ||
3706 | /* Thumb specific routines */ | |
3707 | ||
3708 | /* Parse and validate that a register is of the right form, this saves | |
3709 | repeated checking of this information in many similar cases. | |
3710 | Unlike the 32-bit case we do not insert the register into the opcode | |
3711 | here, since the position is often unknown until the full instruction | |
3712 | has been parsed. */ | |
3713 | static int | |
3714 | thumb_reg (strp, hi_lo) | |
3715 | char ** strp; | |
3716 | int hi_lo; | |
3717 | { | |
3718 | int reg; | |
3719 | ||
3720 | if ((reg = reg_required_here (strp, -1)) == FAIL) | |
3721 | return FAIL; | |
3722 | ||
3723 | switch (hi_lo) | |
3724 | { | |
3725 | case THUMB_REG_LO: | |
3726 | if (reg > 7) | |
3727 | { | |
3728 | inst.error = _("lo register required"); | |
3729 | return FAIL; | |
3730 | } | |
3731 | break; | |
3732 | ||
3733 | case THUMB_REG_HI: | |
3734 | if (reg < 8) | |
3735 | { | |
3736 | inst.error = _("hi register required"); | |
3737 | return FAIL; | |
3738 | } | |
3739 | break; | |
3740 | ||
3741 | default: | |
3742 | break; | |
3743 | } | |
3744 | ||
3745 | return reg; | |
3746 | } | |
3747 | ||
3748 | /* Parse an add or subtract instruction, SUBTRACT is non-zero if the opcode | |
3749 | was SUB. */ | |
3750 | static void | |
3751 | thumb_add_sub (str, subtract) | |
3752 | char * str; | |
3753 | int subtract; | |
3754 | { | |
3755 | int Rd, Rs, Rn = FAIL; | |
3756 | ||
3757 | while (*str == ' ') | |
3758 | str++; | |
3759 | ||
3760 | if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL | |
3761 | || skip_past_comma (&str) == FAIL) | |
3762 | { | |
3763 | if (! inst.error) | |
3764 | inst.error = bad_args; | |
3765 | return; | |
3766 | } | |
3767 | ||
3768 | if (is_immediate_prefix (*str)) | |
3769 | { | |
3770 | Rs = Rd; | |
3771 | str++; | |
3772 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3773 | return; | |
3774 | } | |
3775 | else | |
3776 | { | |
3777 | if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
3778 | return; | |
3779 | ||
3780 | if (skip_past_comma (&str) == FAIL) | |
3781 | { | |
3782 | /* Two operand format, shuffle the registers and pretend there | |
3783 | are 3 */ | |
3784 | Rn = Rs; | |
3785 | Rs = Rd; | |
3786 | } | |
3787 | else if (is_immediate_prefix (*str)) | |
3788 | { | |
3789 | str++; | |
3790 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3791 | return; | |
3792 | } | |
3793 | else if ((Rn = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
3794 | return; | |
3795 | } | |
3796 | ||
3797 | /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; | |
3798 | for the latter case, EXPR contains the immediate that was found. */ | |
3799 | if (Rn != FAIL) | |
3800 | { | |
3801 | /* All register format. */ | |
3802 | if (Rd > 7 || Rs > 7 || Rn > 7) | |
3803 | { | |
3804 | if (Rs != Rd) | |
3805 | { | |
3806 | inst.error = _("dest and source1 must be the same register"); | |
3807 | return; | |
3808 | } | |
3809 | ||
3810 | /* Can't do this for SUB */ | |
3811 | if (subtract) | |
3812 | { | |
3813 | inst.error = _("subtract valid only on lo regs"); | |
3814 | return; | |
3815 | } | |
3816 | ||
3817 | inst.instruction = (T_OPCODE_ADD_HI | |
3818 | | (Rd > 7 ? THUMB_H1 : 0) | |
3819 | | (Rn > 7 ? THUMB_H2 : 0)); | |
3820 | inst.instruction |= (Rd & 7) | ((Rn & 7) << 3); | |
3821 | } | |
3822 | else | |
3823 | { | |
3824 | inst.instruction = subtract ? T_OPCODE_SUB_R3 : T_OPCODE_ADD_R3; | |
3825 | inst.instruction |= Rd | (Rs << 3) | (Rn << 6); | |
3826 | } | |
3827 | } | |
3828 | else | |
3829 | { | |
3830 | /* Immediate expression, now things start to get nasty. */ | |
3831 | ||
3832 | /* First deal with HI regs, only very restricted cases allowed: | |
3833 | Adjusting SP, and using PC or SP to get an address. */ | |
3834 | if ((Rd > 7 && (Rd != REG_SP || Rs != REG_SP)) | |
3835 | || (Rs > 7 && Rs != REG_SP && Rs != REG_PC)) | |
3836 | { | |
3837 | inst.error = _("invalid Hi register with immediate"); | |
3838 | return; | |
3839 | } | |
3840 | ||
3841 | if (inst.reloc.exp.X_op != O_constant) | |
3842 | { | |
3843 | /* Value isn't known yet, all we can do is store all the fragments | |
3844 | we know about in the instruction and let the reloc hacking | |
3845 | work it all out. */ | |
3846 | inst.instruction = (subtract ? 0x8000 : 0) | (Rd << 4) | Rs; | |
3847 | inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; | |
3848 | } | |
3849 | else | |
3850 | { | |
3851 | int offset = inst.reloc.exp.X_add_number; | |
3852 | ||
3853 | if (subtract) | |
3854 | offset = -offset; | |
3855 | ||
3856 | if (offset < 0) | |
3857 | { | |
3858 | offset = -offset; | |
3859 | subtract = 1; | |
3860 | ||
3861 | /* Quick check, in case offset is MIN_INT */ | |
3862 | if (offset < 0) | |
3863 | { | |
3864 | inst.error = _("immediate value out of range"); | |
3865 | return; | |
3866 | } | |
3867 | } | |
3868 | else | |
3869 | subtract = 0; | |
3870 | ||
3871 | if (Rd == REG_SP) | |
3872 | { | |
3873 | if (offset & ~0x1fc) | |
3874 | { | |
3875 | inst.error = _("invalid immediate value for stack adjust"); | |
3876 | return; | |
3877 | } | |
3878 | inst.instruction = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; | |
3879 | inst.instruction |= offset >> 2; | |
3880 | } | |
3881 | else if (Rs == REG_PC || Rs == REG_SP) | |
3882 | { | |
3883 | if (subtract | |
3884 | || (offset & ~0x3fc)) | |
3885 | { | |
3886 | inst.error = _("invalid immediate for address calculation"); | |
3887 | return; | |
3888 | } | |
3889 | inst.instruction = (Rs == REG_PC ? T_OPCODE_ADD_PC | |
3890 | : T_OPCODE_ADD_SP); | |
3891 | inst.instruction |= (Rd << 8) | (offset >> 2); | |
3892 | } | |
3893 | else if (Rs == Rd) | |
3894 | { | |
3895 | if (offset & ~0xff) | |
3896 | { | |
3897 | inst.error = _("immediate value out of range"); | |
3898 | return; | |
3899 | } | |
3900 | inst.instruction = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; | |
3901 | inst.instruction |= (Rd << 8) | offset; | |
3902 | } | |
3903 | else | |
3904 | { | |
3905 | if (offset & ~0x7) | |
3906 | { | |
3907 | inst.error = _("immediate value out of range"); | |
3908 | return; | |
3909 | } | |
3910 | inst.instruction = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; | |
3911 | inst.instruction |= Rd | (Rs << 3) | (offset << 6); | |
3912 | } | |
3913 | } | |
3914 | } | |
3915 | end_of_line (str); | |
3916 | } | |
3917 | ||
3918 | static void | |
3919 | thumb_shift (str, shift) | |
3920 | char * str; | |
3921 | int shift; | |
3922 | { | |
3923 | int Rd, Rs, Rn = FAIL; | |
3924 | ||
3925 | while (*str == ' ') | |
3926 | str++; | |
3927 | ||
3928 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
3929 | || skip_past_comma (&str) == FAIL) | |
3930 | { | |
3931 | if (! inst.error) | |
3932 | inst.error = bad_args; | |
3933 | return; | |
3934 | } | |
3935 | ||
3936 | if (is_immediate_prefix (*str)) | |
3937 | { | |
3938 | /* Two operand immediate format, set Rs to Rd. */ | |
3939 | Rs = Rd; | |
3940 | str++; | |
3941 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3942 | return; | |
3943 | } | |
3944 | else | |
3945 | { | |
3946 | if ((Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
3947 | return; | |
3948 | ||
3949 | if (skip_past_comma (&str) == FAIL) | |
3950 | { | |
3951 | /* Two operand format, shuffle the registers and pretend there | |
3952 | are 3 */ | |
3953 | Rn = Rs; | |
3954 | Rs = Rd; | |
3955 | } | |
3956 | else if (is_immediate_prefix (*str)) | |
3957 | { | |
3958 | str++; | |
3959 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3960 | return; | |
3961 | } | |
3962 | else if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
3963 | return; | |
3964 | } | |
3965 | ||
3966 | /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; | |
3967 | for the latter case, EXPR contains the immediate that was found. */ | |
3968 | ||
3969 | if (Rn != FAIL) | |
3970 | { | |
3971 | if (Rs != Rd) | |
3972 | { | |
3973 | inst.error = _("source1 and dest must be same register"); | |
3974 | return; | |
3975 | } | |
3976 | ||
3977 | switch (shift) | |
3978 | { | |
3979 | case THUMB_ASR: inst.instruction = T_OPCODE_ASR_R; break; | |
3980 | case THUMB_LSL: inst.instruction = T_OPCODE_LSL_R; break; | |
3981 | case THUMB_LSR: inst.instruction = T_OPCODE_LSR_R; break; | |
3982 | } | |
3983 | ||
3984 | inst.instruction |= Rd | (Rn << 3); | |
3985 | } | |
3986 | else | |
3987 | { | |
3988 | switch (shift) | |
3989 | { | |
3990 | case THUMB_ASR: inst.instruction = T_OPCODE_ASR_I; break; | |
3991 | case THUMB_LSL: inst.instruction = T_OPCODE_LSL_I; break; | |
3992 | case THUMB_LSR: inst.instruction = T_OPCODE_LSR_I; break; | |
3993 | } | |
3994 | ||
3995 | if (inst.reloc.exp.X_op != O_constant) | |
3996 | { | |
3997 | /* Value isn't known yet, create a dummy reloc and let reloc | |
3998 | hacking fix it up */ | |
3999 | ||
4000 | inst.reloc.type = BFD_RELOC_ARM_THUMB_SHIFT; | |
4001 | } | |
4002 | else | |
4003 | { | |
4004 | unsigned shift_value = inst.reloc.exp.X_add_number; | |
4005 | ||
4006 | if (shift_value > 32 || (shift_value == 32 && shift == THUMB_LSL)) | |
4007 | { | |
4008 | inst.error = _("Invalid immediate for shift"); | |
4009 | return; | |
4010 | } | |
4011 | ||
4012 | /* Shifts of zero are handled by converting to LSL */ | |
4013 | if (shift_value == 0) | |
4014 | inst.instruction = T_OPCODE_LSL_I; | |
4015 | ||
4016 | /* Shifts of 32 are encoded as a shift of zero */ | |
4017 | if (shift_value == 32) | |
4018 | shift_value = 0; | |
4019 | ||
4020 | inst.instruction |= shift_value << 6; | |
4021 | } | |
4022 | ||
4023 | inst.instruction |= Rd | (Rs << 3); | |
4024 | } | |
4025 | end_of_line (str); | |
4026 | } | |
4027 | ||
4028 | static void | |
4029 | thumb_mov_compare (str, move) | |
4030 | char * str; | |
4031 | int move; | |
4032 | { | |
4033 | int Rd, Rs = FAIL; | |
4034 | ||
4035 | while (*str == ' ') | |
4036 | str++; | |
4037 | ||
4038 | if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL | |
4039 | || skip_past_comma (&str) == FAIL) | |
4040 | { | |
4041 | if (! inst.error) | |
4042 | inst.error = bad_args; | |
4043 | return; | |
4044 | } | |
4045 | ||
4046 | if (is_immediate_prefix (*str)) | |
4047 | { | |
4048 | str++; | |
4049 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4050 | return; | |
4051 | } | |
4052 | else if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4053 | return; | |
4054 | ||
4055 | if (Rs != FAIL) | |
4056 | { | |
4057 | if (Rs < 8 && Rd < 8) | |
4058 | { | |
4059 | if (move == THUMB_MOVE) | |
4060 | /* A move of two lowregs is encoded as ADD Rd, Rs, #0 | |
4061 | since a MOV instruction produces unpredictable results */ | |
4062 | inst.instruction = T_OPCODE_ADD_I3; | |
4063 | else | |
4064 | inst.instruction = T_OPCODE_CMP_LR; | |
4065 | inst.instruction |= Rd | (Rs << 3); | |
4066 | } | |
4067 | else | |
4068 | { | |
4069 | if (move == THUMB_MOVE) | |
4070 | inst.instruction = T_OPCODE_MOV_HR; | |
4071 | else | |
4072 | inst.instruction = T_OPCODE_CMP_HR; | |
4073 | ||
4074 | if (Rd > 7) | |
4075 | inst.instruction |= THUMB_H1; | |
4076 | ||
4077 | if (Rs > 7) | |
4078 | inst.instruction |= THUMB_H2; | |
4079 | ||
4080 | inst.instruction |= (Rd & 7) | ((Rs & 7) << 3); | |
4081 | } | |
4082 | } | |
4083 | else | |
4084 | { | |
4085 | if (Rd > 7) | |
4086 | { | |
4087 | inst.error = _("only lo regs allowed with immediate"); | |
4088 | return; | |
4089 | } | |
4090 | ||
4091 | if (move == THUMB_MOVE) | |
4092 | inst.instruction = T_OPCODE_MOV_I8; | |
4093 | else | |
4094 | inst.instruction = T_OPCODE_CMP_I8; | |
4095 | ||
4096 | inst.instruction |= Rd << 8; | |
4097 | ||
4098 | if (inst.reloc.exp.X_op != O_constant) | |
4099 | inst.reloc.type = BFD_RELOC_ARM_THUMB_IMM; | |
4100 | else | |
4101 | { | |
4102 | unsigned value = inst.reloc.exp.X_add_number; | |
4103 | ||
4104 | if (value > 255) | |
4105 | { | |
4106 | inst.error = _("invalid immediate"); | |
4107 | return; | |
4108 | } | |
4109 | ||
4110 | inst.instruction |= value; | |
4111 | } | |
4112 | } | |
4113 | ||
4114 | end_of_line (str); | |
4115 | } | |
4116 | ||
4117 | static void | |
4118 | thumb_load_store (str, load_store, size) | |
4119 | char * str; | |
4120 | int load_store; | |
4121 | int size; | |
4122 | { | |
4123 | int Rd, Rb, Ro = FAIL; | |
4124 | ||
4125 | while (*str == ' ') | |
4126 | str++; | |
4127 | ||
4128 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4129 | || skip_past_comma (&str) == FAIL) | |
4130 | { | |
4131 | if (! inst.error) | |
4132 | inst.error = bad_args; | |
4133 | return; | |
4134 | } | |
4135 | ||
4136 | if (*str == '[') | |
4137 | { | |
4138 | str++; | |
4139 | if ((Rb = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4140 | return; | |
4141 | ||
4142 | if (skip_past_comma (&str) != FAIL) | |
4143 | { | |
4144 | if (is_immediate_prefix (*str)) | |
4145 | { | |
4146 | str++; | |
4147 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4148 | return; | |
4149 | } | |
4150 | else if ((Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4151 | return; | |
4152 | } | |
4153 | else | |
4154 | { | |
4155 | inst.reloc.exp.X_op = O_constant; | |
4156 | inst.reloc.exp.X_add_number = 0; | |
4157 | } | |
4158 | ||
4159 | if (*str != ']') | |
4160 | { | |
4161 | inst.error = _("expected ']'"); | |
4162 | return; | |
4163 | } | |
4164 | str++; | |
4165 | } | |
4166 | else if (*str == '=') | |
4167 | { | |
4168 | /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ | |
4169 | str++; | |
4170 | ||
4171 | while (*str == ' ') | |
4172 | str++; | |
4173 | ||
4174 | if (my_get_expression (& inst.reloc.exp, & str)) | |
4175 | return; | |
4176 | ||
4177 | end_of_line (str); | |
4178 | ||
4179 | if ( inst.reloc.exp.X_op != O_constant | |
4180 | && inst.reloc.exp.X_op != O_symbol) | |
4181 | { | |
4182 | inst.error = "Constant expression expected"; | |
4183 | return; | |
4184 | } | |
4185 | ||
4186 | if (inst.reloc.exp.X_op == O_constant | |
4187 | && ((inst.reloc.exp.X_add_number & ~0xFF) == 0)) | |
4188 | { | |
4189 | /* This can be done with a mov instruction */ | |
4190 | ||
4191 | inst.instruction = T_OPCODE_MOV_I8 | (Rd << 8); | |
4192 | inst.instruction |= inst.reloc.exp.X_add_number; | |
4193 | return; | |
4194 | } | |
4195 | ||
4196 | /* Insert into literal pool */ | |
4197 | if (add_to_lit_pool () == FAIL) | |
4198 | { | |
4199 | if (!inst.error) | |
4200 | inst.error = "literal pool insertion failed"; | |
4201 | return; | |
4202 | } | |
4203 | ||
4204 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4205 | inst.reloc.pc_rel = 1; | |
4206 | inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); | |
4207 | inst.reloc.exp.X_add_number += 4; /* Adjust ARM pipeline offset to Thumb */ | |
4208 | ||
4209 | return; | |
4210 | } | |
4211 | else | |
4212 | { | |
4213 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4214 | return; | |
4215 | ||
4216 | inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); | |
4217 | inst.reloc.pc_rel = 1; | |
4218 | inst.reloc.exp.X_add_number -= 4; /* Pipeline offset */ | |
4219 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4220 | end_of_line (str); | |
4221 | return; | |
4222 | } | |
4223 | ||
4224 | if (Rb == REG_PC || Rb == REG_SP) | |
4225 | { | |
4226 | if (size != THUMB_WORD) | |
4227 | { | |
4228 | inst.error = _("byte or halfword not valid for base register"); | |
4229 | return; | |
4230 | } | |
4231 | else if (Rb == REG_PC && load_store != THUMB_LOAD) | |
4232 | { | |
4233 | inst.error = _("R15 based store not allowed"); | |
4234 | return; | |
4235 | } | |
4236 | else if (Ro != FAIL) | |
4237 | { | |
4238 | inst.error = _("Invalid base register for register offset"); | |
4239 | return; | |
4240 | } | |
4241 | ||
4242 | if (Rb == REG_PC) | |
4243 | inst.instruction = T_OPCODE_LDR_PC; | |
4244 | else if (load_store == THUMB_LOAD) | |
4245 | inst.instruction = T_OPCODE_LDR_SP; | |
4246 | else | |
4247 | inst.instruction = T_OPCODE_STR_SP; | |
4248 | ||
4249 | inst.instruction |= Rd << 8; | |
4250 | if (inst.reloc.exp.X_op == O_constant) | |
4251 | { | |
4252 | unsigned offset = inst.reloc.exp.X_add_number; | |
4253 | ||
4254 | if (offset & ~0x3fc) | |
4255 | { | |
4256 | inst.error = _("invalid offset"); | |
4257 | return; | |
4258 | } | |
4259 | ||
4260 | inst.instruction |= offset >> 2; | |
4261 | } | |
4262 | else | |
4263 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4264 | } | |
4265 | else if (Rb > 7) | |
4266 | { | |
4267 | inst.error = _("invalid base register in load/store"); | |
4268 | return; | |
4269 | } | |
4270 | else if (Ro == FAIL) | |
4271 | { | |
4272 | /* Immediate offset */ | |
4273 | if (size == THUMB_WORD) | |
4274 | inst.instruction = (load_store == THUMB_LOAD | |
4275 | ? T_OPCODE_LDR_IW : T_OPCODE_STR_IW); | |
4276 | else if (size == THUMB_HALFWORD) | |
4277 | inst.instruction = (load_store == THUMB_LOAD | |
4278 | ? T_OPCODE_LDR_IH : T_OPCODE_STR_IH); | |
4279 | else | |
4280 | inst.instruction = (load_store == THUMB_LOAD | |
4281 | ? T_OPCODE_LDR_IB : T_OPCODE_STR_IB); | |
4282 | ||
4283 | inst.instruction |= Rd | (Rb << 3); | |
4284 | ||
4285 | if (inst.reloc.exp.X_op == O_constant) | |
4286 | { | |
4287 | unsigned offset = inst.reloc.exp.X_add_number; | |
4288 | ||
4289 | if (offset & ~(0x1f << size)) | |
4290 | { | |
4291 | inst.error = _("Invalid offset"); | |
4292 | return; | |
4293 | } | |
4294 | inst.instruction |= (offset >> size) << 6; | |
4295 | } | |
4296 | else | |
4297 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4298 | } | |
4299 | else | |
4300 | { | |
4301 | /* Register offset */ | |
4302 | if (size == THUMB_WORD) | |
4303 | inst.instruction = (load_store == THUMB_LOAD | |
4304 | ? T_OPCODE_LDR_RW : T_OPCODE_STR_RW); | |
4305 | else if (size == THUMB_HALFWORD) | |
4306 | inst.instruction = (load_store == THUMB_LOAD | |
4307 | ? T_OPCODE_LDR_RH : T_OPCODE_STR_RH); | |
4308 | else | |
4309 | inst.instruction = (load_store == THUMB_LOAD | |
4310 | ? T_OPCODE_LDR_RB : T_OPCODE_STR_RB); | |
4311 | ||
4312 | inst.instruction |= Rd | (Rb << 3) | (Ro << 6); | |
4313 | } | |
4314 | ||
4315 | end_of_line (str); | |
4316 | } | |
4317 | ||
4318 | static void | |
4319 | do_t_nop (str) | |
4320 | char * str; | |
4321 | { | |
4322 | /* Do nothing */ | |
4323 | end_of_line (str); | |
4324 | return; | |
4325 | } | |
4326 | ||
4327 | /* Handle the Format 4 instructions that do not have equivalents in other | |
4328 | formats. That is, ADC, AND, EOR, SBC, ROR, TST, NEG, CMN, ORR, MUL, | |
4329 | BIC and MVN. */ | |
4330 | static void | |
4331 | do_t_arit (str) | |
4332 | char * str; | |
4333 | { | |
4334 | int Rd, Rs, Rn; | |
4335 | ||
4336 | while (*str == ' ') | |
4337 | str++; | |
4338 | ||
4339 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4340 | return; | |
4341 | ||
4342 | if (skip_past_comma (&str) == FAIL | |
4343 | || (Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4344 | { | |
4345 | if (! inst.error) | |
4346 | inst.error = bad_args; | |
4347 | return; | |
4348 | } | |
4349 | ||
4350 | if (skip_past_comma (&str) != FAIL) | |
4351 | { | |
4352 | /* Three operand format not allowed for TST, CMN, NEG and MVN. | |
4353 | (It isn't allowed for CMP either, but that isn't handled by this | |
4354 | function.) */ | |
4355 | if (inst.instruction == T_OPCODE_TST | |
4356 | || inst.instruction == T_OPCODE_CMN | |
4357 | || inst.instruction == T_OPCODE_NEG | |
4358 | || inst.instruction == T_OPCODE_MVN) | |
4359 | { | |
4360 | inst.error = bad_args; | |
4361 | return; | |
4362 | } | |
4363 | ||
4364 | if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4365 | return; | |
4366 | ||
4367 | if (Rs != Rd) | |
4368 | { | |
4369 | inst.error = _("dest and source1 one must be the same register"); | |
4370 | return; | |
4371 | } | |
4372 | Rs = Rn; | |
4373 | } | |
4374 | ||
4375 | if (inst.instruction == T_OPCODE_MUL | |
4376 | && Rs == Rd) | |
4377 | as_tsktsk (_("Rs and Rd must be different in MUL")); | |
4378 | ||
4379 | inst.instruction |= Rd | (Rs << 3); | |
4380 | end_of_line (str); | |
4381 | } | |
4382 | ||
4383 | static void | |
4384 | do_t_add (str) | |
4385 | char * str; | |
4386 | { | |
4387 | thumb_add_sub (str, 0); | |
4388 | } | |
4389 | ||
4390 | static void | |
4391 | do_t_asr (str) | |
4392 | char * str; | |
4393 | { | |
4394 | thumb_shift (str, THUMB_ASR); | |
4395 | } | |
4396 | ||
4397 | static void | |
4398 | do_t_branch9 (str) | |
4399 | char * str; | |
4400 | { | |
4401 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4402 | return; | |
4403 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH9; | |
4404 | inst.reloc.pc_rel = 1; | |
4405 | end_of_line (str); | |
4406 | } | |
4407 | ||
4408 | static void | |
4409 | do_t_branch12 (str) | |
4410 | char * str; | |
4411 | { | |
4412 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4413 | return; | |
4414 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH12; | |
4415 | inst.reloc.pc_rel = 1; | |
4416 | end_of_line (str); | |
4417 | } | |
4418 | ||
4419 | /* Find the real, Thumb encoded start of a Thumb function. */ | |
4420 | ||
4421 | static symbolS * | |
4422 | find_real_start (symbolP) | |
4423 | symbolS * symbolP; | |
4424 | { | |
4425 | char * real_start; | |
4426 | const char * name = S_GET_NAME (symbolP); | |
4427 | symbolS * new_target; | |
4428 | ||
4429 | /* This definitonmust agree with the one in gcc/config/arm/thumb.c */ | |
4430 | #define STUB_NAME ".real_start_of" | |
4431 | ||
4432 | if (name == NULL) | |
4433 | abort(); | |
4434 | ||
4435 | /* Names that start with '.' are local labels, not function entry points. | |
4436 | The compiler may generate BL instructions to these labels because it | |
4437 | needs to perform a branch to a far away location. */ | |
4438 | if (name[0] == '.') | |
4439 | return symbolP; | |
4440 | ||
4441 | real_start = malloc (strlen (name) + strlen (STUB_NAME) + 1); | |
4442 | sprintf (real_start, "%s%s", STUB_NAME, name); | |
4443 | ||
4444 | new_target = symbol_find (real_start); | |
4445 | ||
4446 | if (new_target == NULL) | |
4447 | { | |
4448 | as_warn ("Failed to find real start of function: %s\n", name); | |
4449 | new_target = symbolP; | |
4450 | } | |
4451 | ||
4452 | free (real_start); | |
4453 | ||
4454 | return new_target; | |
4455 | } | |
4456 | ||
4457 | ||
4458 | static void | |
4459 | do_t_branch23 (str) | |
4460 | char * str; | |
4461 | { | |
4462 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4463 | return; | |
4464 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH23; | |
4465 | inst.reloc.pc_rel = 1; | |
4466 | end_of_line (str); | |
4467 | ||
4468 | /* If the destination of the branch is a defined symbol which does not have | |
4469 | the THUMB_FUNC attribute, then we must be calling a function which has | |
4470 | the (interfacearm) attribute. We look for the Thumb entry point to that | |
4471 | function and change the branch to refer to that function instead. */ | |
4472 | if ( inst.reloc.exp.X_op == O_symbol | |
4473 | && inst.reloc.exp.X_add_symbol != NULL | |
4474 | && S_IS_DEFINED (inst.reloc.exp.X_add_symbol) | |
4475 | && ! THUMB_IS_FUNC (inst.reloc.exp.X_add_symbol)) | |
4476 | inst.reloc.exp.X_add_symbol = find_real_start (inst.reloc.exp.X_add_symbol); | |
4477 | } | |
4478 | ||
4479 | static void | |
4480 | do_t_bx (str) | |
4481 | char * str; | |
4482 | { | |
4483 | int reg; | |
4484 | ||
4485 | while (*str == ' ') | |
4486 | str++; | |
4487 | ||
4488 | if ((reg = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4489 | return; | |
4490 | ||
4491 | /* This sets THUMB_H2 from the top bit of reg. */ | |
4492 | inst.instruction |= reg << 3; | |
4493 | ||
4494 | /* ??? FIXME: Should add a hacky reloc here if reg is REG_PC. The reloc | |
4495 | should cause the alignment to be checked once it is known. This is | |
4496 | because BX PC only works if the instruction is word aligned. */ | |
4497 | ||
4498 | end_of_line (str); | |
4499 | } | |
4500 | ||
4501 | static void | |
4502 | do_t_compare (str) | |
4503 | char * str; | |
4504 | { | |
4505 | thumb_mov_compare (str, THUMB_COMPARE); | |
4506 | } | |
4507 | ||
4508 | static void | |
4509 | do_t_ldmstm (str) | |
4510 | char * str; | |
4511 | { | |
4512 | int Rb; | |
4513 | long range; | |
4514 | ||
4515 | while (*str == ' ') | |
4516 | str++; | |
4517 | ||
4518 | if ((Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4519 | return; | |
4520 | ||
4521 | if (*str != '!') | |
4522 | as_warn (_("Inserted missing '!': load/store multiple always writes back base register")); | |
4523 | else | |
4524 | str++; | |
4525 | ||
4526 | if (skip_past_comma (&str) == FAIL | |
4527 | || (range = reg_list (&str)) == FAIL) | |
4528 | { | |
4529 | if (! inst.error) | |
4530 | inst.error = bad_args; | |
4531 | return; | |
4532 | } | |
4533 | ||
4534 | if (inst.reloc.type != BFD_RELOC_NONE) | |
4535 | { | |
4536 | /* This really doesn't seem worth it. */ | |
4537 | inst.reloc.type = BFD_RELOC_NONE; | |
4538 | inst.error = _("Expression too complex"); | |
4539 | return; | |
4540 | } | |
4541 | ||
4542 | if (range & ~0xff) | |
4543 | { | |
4544 | inst.error = _("only lo-regs valid in load/store multiple"); | |
4545 | return; | |
4546 | } | |
4547 | ||
4548 | inst.instruction |= (Rb << 8) | range; | |
4549 | end_of_line (str); | |
4550 | } | |
4551 | ||
4552 | static void | |
4553 | do_t_ldr (str) | |
4554 | char * str; | |
4555 | { | |
4556 | thumb_load_store (str, THUMB_LOAD, THUMB_WORD); | |
4557 | } | |
4558 | ||
4559 | static void | |
4560 | do_t_ldrb (str) | |
4561 | char * str; | |
4562 | { | |
4563 | thumb_load_store (str, THUMB_LOAD, THUMB_BYTE); | |
4564 | } | |
4565 | ||
4566 | static void | |
4567 | do_t_ldrh (str) | |
4568 | char * str; | |
4569 | { | |
4570 | thumb_load_store (str, THUMB_LOAD, THUMB_HALFWORD); | |
4571 | } | |
4572 | ||
4573 | static void | |
4574 | do_t_lds (str) | |
4575 | char * str; | |
4576 | { | |
4577 | int Rd, Rb, Ro; | |
4578 | ||
4579 | while (*str == ' ') | |
4580 | str++; | |
4581 | ||
4582 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4583 | || skip_past_comma (&str) == FAIL | |
4584 | || *str++ != '[' | |
4585 | || (Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4586 | || skip_past_comma (&str) == FAIL | |
4587 | || (Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4588 | || *str++ != ']') | |
4589 | { | |
4590 | if (! inst.error) | |
4591 | inst.error = _("Syntax: ldrs[b] Rd, [Rb, Ro]"); | |
4592 | return; | |
4593 | } | |
4594 | ||
4595 | inst.instruction |= Rd | (Rb << 3) | (Ro << 6); | |
4596 | end_of_line (str); | |
4597 | } | |
4598 | ||
4599 | static void | |
4600 | do_t_lsl (str) | |
4601 | char * str; | |
4602 | { | |
4603 | thumb_shift (str, THUMB_LSL); | |
4604 | } | |
4605 | ||
4606 | static void | |
4607 | do_t_lsr (str) | |
4608 | char * str; | |
4609 | { | |
4610 | thumb_shift (str, THUMB_LSR); | |
4611 | } | |
4612 | ||
4613 | static void | |
4614 | do_t_mov (str) | |
4615 | char * str; | |
4616 | { | |
4617 | thumb_mov_compare (str, THUMB_MOVE); | |
4618 | } | |
4619 | ||
4620 | static void | |
4621 | do_t_push_pop (str) | |
4622 | char * str; | |
4623 | { | |
4624 | long range; | |
4625 | ||
4626 | while (*str == ' ') | |
4627 | str++; | |
4628 | ||
4629 | if ((range = reg_list (&str)) == FAIL) | |
4630 | { | |
4631 | if (! inst.error) | |
4632 | inst.error = bad_args; | |
4633 | return; | |
4634 | } | |
4635 | ||
4636 | if (inst.reloc.type != BFD_RELOC_NONE) | |
4637 | { | |
4638 | /* This really doesn't seem worth it. */ | |
4639 | inst.reloc.type = BFD_RELOC_NONE; | |
4640 | inst.error = _("Expression too complex"); | |
4641 | return; | |
4642 | } | |
4643 | ||
4644 | if (range & ~0xff) | |
4645 | { | |
4646 | if ((inst.instruction == T_OPCODE_PUSH | |
4647 | && (range & ~0xff) == 1 << REG_LR) | |
4648 | || (inst.instruction == T_OPCODE_POP | |
4649 | && (range & ~0xff) == 1 << REG_PC)) | |
4650 | { | |
4651 | inst.instruction |= THUMB_PP_PC_LR; | |
4652 | range &= 0xff; | |
4653 | } | |
4654 | else | |
4655 | { | |
4656 | inst.error = _("invalid register list to push/pop instruction"); | |
4657 | return; | |
4658 | } | |
4659 | } | |
4660 | ||
4661 | inst.instruction |= range; | |
4662 | end_of_line (str); | |
4663 | } | |
4664 | ||
4665 | static void | |
4666 | do_t_str (str) | |
4667 | char * str; | |
4668 | { | |
4669 | thumb_load_store (str, THUMB_STORE, THUMB_WORD); | |
4670 | } | |
4671 | ||
4672 | static void | |
4673 | do_t_strb (str) | |
4674 | char * str; | |
4675 | { | |
4676 | thumb_load_store (str, THUMB_STORE, THUMB_BYTE); | |
4677 | } | |
4678 | ||
4679 | static void | |
4680 | do_t_strh (str) | |
4681 | char * str; | |
4682 | { | |
4683 | thumb_load_store (str, THUMB_STORE, THUMB_HALFWORD); | |
4684 | } | |
4685 | ||
4686 | static void | |
4687 | do_t_sub (str) | |
4688 | char * str; | |
4689 | { | |
4690 | thumb_add_sub (str, 1); | |
4691 | } | |
4692 | ||
4693 | static void | |
4694 | do_t_swi (str) | |
4695 | char * str; | |
4696 | { | |
4697 | while (*str == ' ') | |
4698 | str++; | |
4699 | ||
4700 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4701 | return; | |
4702 | ||
4703 | inst.reloc.type = BFD_RELOC_ARM_SWI; | |
4704 | end_of_line (str); | |
4705 | return; | |
4706 | } | |
4707 | ||
4708 | static void | |
4709 | do_t_adr (str) | |
4710 | char * str; | |
4711 | { | |
4712 | /* This is a pseudo-op of the form "adr rd, label" to be converted | |
4713 | into a relative address of the form "add rd, pc, #label-.-4" */ | |
4714 | while (*str == ' ') | |
4715 | str++; | |
4716 | ||
4717 | if (reg_required_here (&str, 4) == FAIL /* Store Rd in temporary location inside instruction. */ | |
4718 | || skip_past_comma (&str) == FAIL | |
4719 | || my_get_expression (&inst.reloc.exp, &str)) | |
4720 | { | |
4721 | if (!inst.error) | |
4722 | inst.error = bad_args; | |
4723 | return; | |
4724 | } | |
4725 | ||
4726 | inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; | |
4727 | inst.reloc.exp.X_add_number -= 4; /* PC relative adjust */ | |
4728 | inst.reloc.pc_rel = 1; | |
4729 | inst.instruction |= REG_PC; /* Rd is already placed into the instruction */ | |
4730 | end_of_line (str); | |
4731 | } | |
4732 | ||
4733 | static void | |
4734 | insert_reg (entry) | |
4735 | int entry; | |
4736 | { | |
4737 | int len = strlen (reg_table[entry].name) + 2; | |
4738 | char * buf = (char *) xmalloc (len); | |
4739 | char * buf2 = (char *) xmalloc (len); | |
4740 | int i = 0; | |
4741 | ||
4742 | #ifdef REGISTER_PREFIX | |
4743 | buf[i++] = REGISTER_PREFIX; | |
4744 | #endif | |
4745 | ||
4746 | strcpy (buf + i, reg_table[entry].name); | |
4747 | ||
4748 | for (i = 0; buf[i]; i++) | |
4749 | buf2[i] = islower (buf[i]) ? toupper (buf[i]) : buf[i]; | |
4750 | ||
4751 | buf2[i] = '\0'; | |
4752 | ||
4753 | hash_insert (arm_reg_hsh, buf, (PTR) ®_table[entry]); | |
4754 | hash_insert (arm_reg_hsh, buf2, (PTR) ®_table[entry]); | |
4755 | } | |
4756 | ||
4757 | static void | |
4758 | insert_reg_alias (str, regnum) | |
4759 | char *str; | |
4760 | int regnum; | |
4761 | { | |
4762 | struct reg_entry *new = | |
4763 | (struct reg_entry *)xmalloc (sizeof (struct reg_entry)); | |
4764 | char *name = xmalloc (strlen (str) + 1); | |
4765 | strcpy (name, str); | |
4766 | ||
4767 | new->name = name; | |
4768 | new->number = regnum; | |
4769 | ||
4770 | hash_insert (arm_reg_hsh, name, (PTR) new); | |
4771 | } | |
4772 | ||
4773 | static void | |
4774 | set_constant_flonums () | |
4775 | { | |
4776 | int i; | |
4777 | ||
4778 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
4779 | if (atof_ieee ((char *)fp_const[i], 'x', fp_values[i]) == NULL) | |
4780 | abort (); | |
4781 | } | |
4782 | ||
4783 | void | |
4784 | md_begin () | |
4785 | { | |
4786 | int i; | |
4787 | ||
4788 | if ( (arm_ops_hsh = hash_new ()) == NULL | |
4789 | || (arm_tops_hsh = hash_new ()) == NULL | |
4790 | || (arm_cond_hsh = hash_new ()) == NULL | |
4791 | || (arm_shift_hsh = hash_new ()) == NULL | |
4792 | || (arm_reg_hsh = hash_new ()) == NULL | |
4793 | || (arm_psr_hsh = hash_new ()) == NULL) | |
4794 | as_fatal (_("Virtual memory exhausted")); | |
4795 | ||
4796 | for (i = 0; i < sizeof (insns) / sizeof (struct asm_opcode); i++) | |
4797 | hash_insert (arm_ops_hsh, insns[i].template, (PTR) (insns + i)); | |
4798 | for (i = 0; i < sizeof (tinsns) / sizeof (struct thumb_opcode); i++) | |
4799 | hash_insert (arm_tops_hsh, tinsns[i].template, (PTR) (tinsns + i)); | |
4800 | for (i = 0; i < sizeof (conds) / sizeof (struct asm_cond); i++) | |
4801 | hash_insert (arm_cond_hsh, conds[i].template, (PTR) (conds + i)); | |
4802 | for (i = 0; i < sizeof (shift) / sizeof (struct asm_shift); i++) | |
4803 | hash_insert (arm_shift_hsh, shift[i].template, (PTR) (shift + i)); | |
4804 | for (i = 0; i < sizeof (psrs) / sizeof (struct asm_psr); i++) | |
4805 | hash_insert (arm_psr_hsh, psrs[i].template, (PTR) (psrs + i)); | |
4806 | ||
4807 | for (i = 0; reg_table[i].name; i++) | |
4808 | insert_reg (i); | |
4809 | ||
4810 | set_constant_flonums (); | |
4811 | ||
4812 | #if defined OBJ_COFF || defined OBJ_ELF | |
4813 | { | |
4814 | unsigned int flags = 0; | |
4815 | ||
4816 | /* Set the flags in the private structure */ | |
4817 | if (uses_apcs_26) flags |= F_APCS26; | |
4818 | if (support_interwork) flags |= F_INTERWORK; | |
4819 | if (uses_apcs_float) flags |= F_APCS_FLOAT; | |
4820 | if (pic_code) flags |= F_PIC; | |
4821 | ||
4822 | bfd_set_private_flags (stdoutput, flags); | |
4823 | } | |
4824 | #endif | |
4825 | ||
4826 | { | |
4827 | unsigned mach; | |
4828 | ||
4829 | /* Record the CPU type as well */ | |
4830 | switch (cpu_variant & ARM_CPU_MASK) | |
4831 | { | |
4832 | case ARM_2: | |
4833 | mach = bfd_mach_arm_2; | |
4834 | break; | |
4835 | ||
4836 | case ARM_3: /* also ARM_250 */ | |
4837 | mach = bfd_mach_arm_2a; | |
4838 | break; | |
4839 | ||
4840 | default: | |
4841 | case ARM_6 | ARM_3 | ARM_2: /* Actually no CPU type defined */ | |
4842 | mach = bfd_mach_arm_4; | |
4843 | break; | |
4844 | ||
4845 | case ARM_7: /* also ARM_6 */ | |
4846 | mach = bfd_mach_arm_3; | |
4847 | break; | |
4848 | } | |
4849 | ||
4850 | /* Catch special cases */ | |
4851 | if (cpu_variant != (FPU_DEFAULT | CPU_DEFAULT)) | |
4852 | { | |
4853 | if (cpu_variant & ARM_THUMB) | |
4854 | mach = bfd_mach_arm_4T; | |
4855 | else if ((cpu_variant & ARM_ARCHv4) == ARM_ARCHv4) | |
4856 | mach = bfd_mach_arm_4; | |
4857 | else if (cpu_variant & ARM_LONGMUL) | |
4858 | mach = bfd_mach_arm_3M; | |
4859 | } | |
4860 | ||
4861 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach); | |
4862 | } | |
4863 | } | |
4864 | ||
4865 | /* Turn an integer of n bytes (in val) into a stream of bytes appropriate | |
4866 | for use in the a.out file, and stores them in the array pointed to by buf. | |
4867 | This knows about the endian-ness of the target machine and does | |
4868 | THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) | |
4869 | 2 (short) and 4 (long) Floating numbers are put out as a series of | |
4870 | LITTLENUMS (shorts, here at least) | |
4871 | */ | |
4872 | void | |
4873 | md_number_to_chars (buf, val, n) | |
4874 | char * buf; | |
4875 | valueT val; | |
4876 | int n; | |
4877 | { | |
4878 | if (target_big_endian) | |
4879 | number_to_chars_bigendian (buf, val, n); | |
4880 | else | |
4881 | number_to_chars_littleendian (buf, val, n); | |
4882 | } | |
4883 | ||
4884 | static valueT | |
4885 | md_chars_to_number (buf, n) | |
4886 | char * buf; | |
4887 | int n; | |
4888 | { | |
4889 | valueT result = 0; | |
4890 | unsigned char * where = (unsigned char *) buf; | |
4891 | ||
4892 | if (target_big_endian) | |
4893 | { | |
4894 | while (n--) | |
4895 | { | |
4896 | result <<= 8; | |
4897 | result |= (*where++ & 255); | |
4898 | } | |
4899 | } | |
4900 | else | |
4901 | { | |
4902 | while (n--) | |
4903 | { | |
4904 | result <<= 8; | |
4905 | result |= (where[n] & 255); | |
4906 | } | |
4907 | } | |
4908 | ||
4909 | return result; | |
4910 | } | |
4911 | ||
4912 | /* Turn a string in input_line_pointer into a floating point constant | |
4913 | of type TYPE, and store the appropriate bytes in *litP. The number | |
4914 | of LITTLENUMS emitted is stored in *sizeP . An error message is | |
4915 | returned, or NULL on OK. | |
4916 | ||
4917 | Note that fp constants aren't represent in the normal way on the ARM. | |
4918 | In big endian mode, things are as expected. However, in little endian | |
4919 | mode fp constants are big-endian word-wise, and little-endian byte-wise | |
4920 | within the words. For example, (double) 1.1 in big endian mode is | |
4921 | the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is | |
4922 | the byte sequence 99 99 f1 3f 9a 99 99 99. | |
4923 | ||
4924 | ??? The format of 12 byte floats is uncertain according to gcc's arm.h. */ | |
4925 | ||
4926 | char * | |
4927 | md_atof (type, litP, sizeP) | |
4928 | char type; | |
4929 | char * litP; | |
4930 | int * sizeP; | |
4931 | { | |
4932 | int prec; | |
4933 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
4934 | char *t; | |
4935 | int i; | |
4936 | ||
4937 | switch (type) | |
4938 | { | |
4939 | case 'f': | |
4940 | case 'F': | |
4941 | case 's': | |
4942 | case 'S': | |
4943 | prec = 2; | |
4944 | break; | |
4945 | ||
4946 | case 'd': | |
4947 | case 'D': | |
4948 | case 'r': | |
4949 | case 'R': | |
4950 | prec = 4; | |
4951 | break; | |
4952 | ||
4953 | case 'x': | |
4954 | case 'X': | |
4955 | prec = 6; | |
4956 | break; | |
4957 | ||
4958 | case 'p': | |
4959 | case 'P': | |
4960 | prec = 6; | |
4961 | break; | |
4962 | ||
4963 | default: | |
4964 | *sizeP = 0; | |
4965 | return _("Bad call to MD_ATOF()"); | |
4966 | } | |
4967 | ||
4968 | t = atof_ieee (input_line_pointer, type, words); | |
4969 | if (t) | |
4970 | input_line_pointer = t; | |
4971 | *sizeP = prec * 2; | |
4972 | ||
4973 | if (target_big_endian) | |
4974 | { | |
4975 | for (i = 0; i < prec; i++) | |
4976 | { | |
4977 | md_number_to_chars (litP, (valueT) words[i], 2); | |
4978 | litP += 2; | |
4979 | } | |
4980 | } | |
4981 | else | |
4982 | { | |
4983 | /* For a 4 byte float the order of elements in `words' is 1 0. For an | |
4984 | 8 byte float the order is 1 0 3 2. */ | |
4985 | for (i = 0; i < prec; i += 2) | |
4986 | { | |
4987 | md_number_to_chars (litP, (valueT) words[i + 1], 2); | |
4988 | md_number_to_chars (litP + 2, (valueT) words[i], 2); | |
4989 | litP += 4; | |
4990 | } | |
4991 | } | |
4992 | ||
4993 | return 0; | |
4994 | } | |
4995 | ||
661e4995 | 4996 | /* The knowledge of the PC's pipeline offset is built into the insns themselves. */ |
252b5132 RH |
4997 | long |
4998 | md_pcrel_from (fixP) | |
4999 | fixS * fixP; | |
5000 | { | |
5001 | if ( fixP->fx_addsy | |
5002 | && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section | |
5003 | && fixP->fx_subsy == NULL) | |
5004 | return 0; | |
5005 | ||
5006 | if (fixP->fx_pcrel && (fixP->fx_r_type == BFD_RELOC_ARM_THUMB_ADD)) | |
5007 | { | |
5008 | /* PC relative addressing on the Thumb is slightly odd | |
5009 | as the bottom two bits of the PC are forced to zero | |
5010 | for the calculation */ | |
5011 | return (fixP->fx_where + fixP->fx_frag->fr_address) & ~3; | |
5012 | } | |
661e4995 | 5013 | |
252b5132 RH |
5014 | return fixP->fx_where + fixP->fx_frag->fr_address; |
5015 | } | |
5016 | ||
5017 | /* Round up a section size to the appropriate boundary. */ | |
5018 | valueT | |
5019 | md_section_align (segment, size) | |
5020 | segT segment; | |
5021 | valueT size; | |
5022 | { | |
5023 | #ifdef OBJ_ELF | |
5024 | /* Don't align the dwarf2 debug sections */ | |
5025 | if (!strncmp (segment->name, ".debug", 5)) | |
5026 | return size; | |
5027 | #endif | |
5028 | /* Round all sects to multiple of 4 */ | |
5029 | return (size + 3) & ~3; | |
5030 | } | |
5031 | ||
5032 | /* Under ELF we need to default _GLOBAL_OFFSET_TABLE. Otherwise | |
5033 | we have no need to default values of symbols. */ | |
5034 | ||
5035 | /* ARGSUSED */ | |
5036 | symbolS * | |
5037 | md_undefined_symbol (name) | |
5038 | char * name; | |
5039 | { | |
5040 | #ifdef OBJ_ELF | |
5041 | if (name[0] == '_' && name[1] == 'G' | |
5042 | && streq (name, GLOBAL_OFFSET_TABLE_NAME)) | |
5043 | { | |
5044 | if (!GOT_symbol) | |
5045 | { | |
5046 | if (symbol_find (name)) | |
5047 | as_bad ("GOT already in the symbol table"); | |
5048 | ||
5049 | GOT_symbol = symbol_new (name, undefined_section, | |
5050 | (valueT)0, & zero_address_frag); | |
5051 | } | |
5052 | ||
5053 | return GOT_symbol; | |
5054 | } | |
5055 | #endif | |
5056 | ||
5057 | return 0; | |
5058 | } | |
5059 | ||
5060 | /* arm_reg_parse () := if it looks like a register, return its token and | |
5061 | advance the pointer. */ | |
5062 | ||
5063 | static int | |
5064 | arm_reg_parse (ccp) | |
5065 | register char ** ccp; | |
5066 | { | |
5067 | char * start = * ccp; | |
5068 | char c; | |
5069 | char * p; | |
5070 | struct reg_entry * reg; | |
5071 | ||
5072 | #ifdef REGISTER_PREFIX | |
5073 | if (*start != REGISTER_PREFIX) | |
5074 | return FAIL; | |
5075 | p = start + 1; | |
5076 | #else | |
5077 | p = start; | |
5078 | #ifdef OPTIONAL_REGISTER_PREFIX | |
5079 | if (*p == OPTIONAL_REGISTER_PREFIX) | |
5080 | p++, start++; | |
5081 | #endif | |
5082 | #endif | |
5083 | if (!isalpha (*p) || !is_name_beginner (*p)) | |
5084 | return FAIL; | |
5085 | ||
5086 | c = *p++; | |
5087 | while (isalpha (c) || isdigit (c) || c == '_') | |
5088 | c = *p++; | |
5089 | ||
5090 | *--p = 0; | |
5091 | reg = (struct reg_entry *) hash_find (arm_reg_hsh, start); | |
5092 | *p = c; | |
5093 | ||
5094 | if (reg) | |
5095 | { | |
5096 | *ccp = p; | |
5097 | return reg->number; | |
5098 | } | |
5099 | ||
5100 | return FAIL; | |
5101 | } | |
5102 | ||
5103 | static int | |
5104 | arm_psr_parse (ccp) | |
5105 | register char ** ccp; | |
5106 | { | |
5107 | char * start = * ccp; | |
5108 | char c; | |
5109 | char * p; | |
5110 | CONST struct asm_psr * psr; | |
5111 | ||
5112 | p = start; | |
5113 | c = *p++; | |
5114 | while (isalpha (c) || c == '_') | |
5115 | c = *p++; | |
5116 | ||
5117 | *--p = 0; | |
5118 | psr = (CONST struct asm_psr *) hash_find (arm_psr_hsh, start); | |
5119 | *p = c; | |
5120 | ||
5121 | if (psr) | |
5122 | { | |
5123 | *ccp = p; | |
5124 | return psr->number; | |
5125 | } | |
5126 | ||
5127 | return FAIL; | |
5128 | } | |
5129 | ||
5130 | int | |
5131 | md_apply_fix3 (fixP, val, seg) | |
5132 | fixS * fixP; | |
5133 | valueT * val; | |
5134 | segT seg; | |
5135 | { | |
5136 | offsetT value = * val; | |
5137 | offsetT newval; | |
5138 | unsigned int newimm; | |
5139 | unsigned long temp; | |
5140 | int sign; | |
5141 | char * buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
5142 | arm_fix_data * arm_data = (arm_fix_data *) fixP->tc_fix_data; | |
5143 | ||
5144 | assert (fixP->fx_r_type < BFD_RELOC_UNUSED); | |
5145 | ||
5146 | /* Note whether this will delete the relocation. */ | |
5147 | #if 0 /* patch from REarnshaw to JDavis (disabled for the moment, since it doesn't work fully) */ | |
5148 | if ((fixP->fx_addsy == 0 || fixP->fx_addsy->sy_value.X_op == O_constant) | |
5149 | && !fixP->fx_pcrel) | |
5150 | #else | |
5151 | if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) | |
5152 | #endif | |
5153 | fixP->fx_done = 1; | |
5154 | ||
5155 | /* If this symbol is in a different section then we need to leave it for | |
5156 | the linker to deal with. Unfortunately, md_pcrel_from can't tell, | |
5157 | so we have to undo it's effects here. */ | |
5158 | if (fixP->fx_pcrel) | |
5159 | { | |
5160 | if (fixP->fx_addsy != NULL | |
5161 | && S_IS_DEFINED (fixP->fx_addsy) | |
5162 | && S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
5163 | { | |
661e4995 NC |
5164 | if (target_oabi |
5165 | && fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH) | |
252b5132 RH |
5166 | value = 0; |
5167 | else | |
5168 | value += md_pcrel_from (fixP); | |
5169 | } | |
5170 | } | |
5171 | ||
5172 | fixP->fx_addnumber = value; /* Remember value for emit_reloc */ | |
5173 | ||
5174 | switch (fixP->fx_r_type) | |
5175 | { | |
5176 | case BFD_RELOC_ARM_IMMEDIATE: | |
5177 | newimm = validate_immediate (value); | |
5178 | temp = md_chars_to_number (buf, INSN_SIZE); | |
5179 | ||
5180 | /* If the instruction will fail, see if we can fix things up by | |
5181 | changing the opcode. */ | |
5182 | if (newimm == (unsigned int) FAIL | |
5183 | && (newimm = negate_data_op (&temp, value)) == (unsigned int) FAIL) | |
5184 | { | |
5185 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5186 | _("invalid constant (%x) after fixup\n"), value); | |
5187 | break; | |
5188 | } | |
5189 | ||
5190 | newimm |= (temp & 0xfffff000); | |
5191 | md_number_to_chars (buf, (valueT) newimm, INSN_SIZE); | |
5192 | break; | |
5193 | ||
5194 | case BFD_RELOC_ARM_OFFSET_IMM: | |
5195 | sign = value >= 0; | |
5196 | if ((value = validate_offset_imm (value, 0)) == FAIL) | |
5197 | { | |
5198 | as_bad (_("bad immediate value for offset (%d)"), val); | |
5199 | break; | |
5200 | } | |
5201 | if (value < 0) | |
5202 | value = -value; | |
5203 | ||
5204 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5205 | newval &= 0xff7ff000; | |
5206 | newval |= value | (sign ? INDEX_UP : 0); | |
5207 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5208 | break; | |
5209 | ||
5210 | case BFD_RELOC_ARM_OFFSET_IMM8: | |
5211 | case BFD_RELOC_ARM_HWLITERAL: | |
5212 | sign = value >= 0; | |
5213 | if ((value = validate_offset_imm (value, 1)) == FAIL) | |
5214 | { | |
5215 | if (fixP->fx_r_type == BFD_RELOC_ARM_HWLITERAL) | |
5216 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5217 | _("invalid literal constant: pool needs to be closer\n")); | |
5218 | else | |
5219 | as_bad (_("bad immediate value for offset (%d)"), value); | |
5220 | break; | |
5221 | } | |
5222 | ||
5223 | if (value < 0) | |
5224 | value = -value; | |
5225 | ||
5226 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5227 | newval &= 0xff7ff0f0; | |
5228 | newval |= ((value >> 4) << 8) | value & 0xf | (sign ? INDEX_UP : 0); | |
5229 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5230 | break; | |
5231 | ||
5232 | case BFD_RELOC_ARM_LITERAL: | |
5233 | sign = value >= 0; | |
5234 | if (value < 0) | |
5235 | value = -value; | |
5236 | ||
5237 | if ((value = validate_offset_imm (value, 0)) == FAIL) | |
5238 | { | |
5239 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5240 | _("invalid literal constant: pool needs to be closer\n")); | |
5241 | break; | |
5242 | } | |
5243 | ||
5244 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5245 | newval &= 0xff7ff000; | |
5246 | newval |= value | (sign ? INDEX_UP : 0); | |
5247 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5248 | break; | |
5249 | ||
5250 | case BFD_RELOC_ARM_SHIFT_IMM: | |
5251 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5252 | if (((unsigned long) value) > 32 | |
5253 | || (value == 32 | |
5254 | && (((newval & 0x60) == 0) || (newval & 0x60) == 0x60))) | |
5255 | { | |
5256 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5257 | _("shift expression is too large")); | |
5258 | break; | |
5259 | } | |
5260 | ||
5261 | if (value == 0) | |
5262 | newval &= ~0x60; /* Shifts of zero must be done as lsl */ | |
5263 | else if (value == 32) | |
5264 | value = 0; | |
5265 | newval &= 0xfffff07f; | |
5266 | newval |= (value & 0x1f) << 7; | |
5267 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5268 | break; | |
5269 | ||
5270 | case BFD_RELOC_ARM_SWI: | |
5271 | if (arm_data->thumb_mode) | |
5272 | { | |
5273 | if (((unsigned long) value) > 0xff) | |
5274 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5275 | _("Invalid swi expression")); | |
5276 | newval = md_chars_to_number (buf, THUMB_SIZE) & 0xff00; | |
5277 | newval |= value; | |
5278 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5279 | } | |
5280 | else | |
5281 | { | |
5282 | if (((unsigned long) value) > 0x00ffffff) | |
5283 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5284 | _("Invalid swi expression")); | |
5285 | newval = md_chars_to_number (buf, INSN_SIZE) & 0xff000000; | |
5286 | newval |= value; | |
5287 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5288 | } | |
5289 | break; | |
5290 | ||
5291 | case BFD_RELOC_ARM_MULTI: | |
5292 | if (((unsigned long) value) > 0xffff) | |
5293 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5294 | _("Invalid expression in load/store multiple")); | |
5295 | newval = value | md_chars_to_number (buf, INSN_SIZE); | |
5296 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5297 | break; | |
5298 | ||
5299 | case BFD_RELOC_ARM_PCREL_BRANCH: | |
5300 | newval = md_chars_to_number (buf, INSN_SIZE); | |
661e4995 | 5301 | |
252b5132 | 5302 | #ifdef OBJ_ELF |
252b5132 RH |
5303 | if (! target_oabi) |
5304 | value = fixP->fx_offset; | |
252b5132 | 5305 | #endif |
661e4995 | 5306 | value = (value >> 2) & 0x00ffffff; |
252b5132 RH |
5307 | value = (value + (newval & 0x00ffffff)) & 0x00ffffff; |
5308 | newval = value | (newval & 0xff000000); | |
5309 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5310 | break; | |
5311 | ||
5312 | case BFD_RELOC_THUMB_PCREL_BRANCH9: /* conditional branch */ | |
5313 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5314 | { | |
5315 | addressT diff = (newval & 0xff) << 1; | |
5316 | if (diff & 0x100) | |
5317 | diff |= ~0xff; | |
5318 | ||
5319 | value += diff; | |
5320 | if ((value & ~0xff) && ((value & ~0xff) != ~0xff)) | |
5321 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5322 | _("Branch out of range")); | |
5323 | newval = (newval & 0xff00) | ((value & 0x1ff) >> 1); | |
5324 | } | |
5325 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5326 | break; | |
5327 | ||
5328 | case BFD_RELOC_THUMB_PCREL_BRANCH12: /* unconditional branch */ | |
5329 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5330 | { | |
5331 | addressT diff = (newval & 0x7ff) << 1; | |
5332 | if (diff & 0x800) | |
5333 | diff |= ~0x7ff; | |
5334 | ||
5335 | value += diff; | |
5336 | if ((value & ~0x7ff) && ((value & ~0x7ff) != ~0x7ff)) | |
5337 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5338 | _("Branch out of range")); | |
5339 | newval = (newval & 0xf800) | ((value & 0xfff) >> 1); | |
5340 | } | |
5341 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5342 | break; | |
5343 | ||
5344 | case BFD_RELOC_THUMB_PCREL_BRANCH23: | |
5345 | { | |
5346 | offsetT newval2; | |
5347 | addressT diff; | |
5348 | ||
5349 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5350 | newval2 = md_chars_to_number (buf + THUMB_SIZE, THUMB_SIZE); | |
5351 | diff = ((newval & 0x7ff) << 12) | ((newval2 & 0x7ff) << 1); | |
5352 | if (diff & 0x400000) | |
5353 | diff |= ~0x3fffff; | |
5354 | value += diff; | |
5355 | if ((value & ~0x3fffff) && ((value & ~0x3fffff) != ~0x3fffff)) | |
5356 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5357 | _("Branch with link out of range")); | |
5358 | ||
5359 | newval = (newval & 0xf800) | ((value & 0x7fffff) >> 12); | |
5360 | newval2 = (newval2 & 0xf800) | ((value & 0xfff) >> 1); | |
5361 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5362 | md_number_to_chars (buf + THUMB_SIZE, newval2, THUMB_SIZE); | |
5363 | } | |
5364 | break; | |
5365 | ||
5366 | case BFD_RELOC_8: | |
5367 | if (fixP->fx_done || fixP->fx_pcrel) | |
5368 | md_number_to_chars (buf, value, 1); | |
5369 | #ifdef OBJ_ELF | |
5370 | else if (!target_oabi) | |
5371 | { | |
5372 | value = fixP->fx_offset; | |
5373 | md_number_to_chars (buf, value, 1); | |
5374 | } | |
5375 | #endif | |
5376 | break; | |
5377 | ||
5378 | case BFD_RELOC_16: | |
5379 | if (fixP->fx_done || fixP->fx_pcrel) | |
5380 | md_number_to_chars (buf, value, 2); | |
5381 | #ifdef OBJ_ELF | |
5382 | else if (!target_oabi) | |
5383 | { | |
5384 | value = fixP->fx_offset; | |
5385 | md_number_to_chars (buf, value, 2); | |
5386 | } | |
5387 | #endif | |
5388 | break; | |
5389 | ||
5390 | #ifdef OBJ_ELF | |
5391 | case BFD_RELOC_ARM_GOT32: | |
5392 | case BFD_RELOC_ARM_GOTOFF: | |
5393 | md_number_to_chars (buf, 0, 4); | |
5394 | break; | |
5395 | #endif | |
5396 | ||
5397 | case BFD_RELOC_RVA: | |
5398 | case BFD_RELOC_32: | |
5399 | if (fixP->fx_done || fixP->fx_pcrel) | |
5400 | md_number_to_chars (buf, value, 4); | |
5401 | #ifdef OBJ_ELF | |
5402 | else if (!target_oabi) | |
5403 | { | |
5404 | value = fixP->fx_offset; | |
5405 | md_number_to_chars (buf, value, 4); | |
5406 | } | |
5407 | #endif | |
5408 | break; | |
5409 | ||
5410 | #ifdef OBJ_ELF | |
5411 | case BFD_RELOC_ARM_PLT32: | |
5412 | /* It appears the instruction is fully prepared at this point. */ | |
5413 | break; | |
5414 | #endif | |
5415 | ||
5416 | case BFD_RELOC_ARM_GOTPC: | |
5417 | md_number_to_chars (buf, value, 4); | |
5418 | break; | |
5419 | ||
5420 | case BFD_RELOC_ARM_CP_OFF_IMM: | |
5421 | sign = value >= 0; | |
5422 | if (value < -1023 || value > 1023 || (value & 3)) | |
5423 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5424 | _("Illegal value for co-processor offset")); | |
5425 | if (value < 0) | |
5426 | value = -value; | |
5427 | newval = md_chars_to_number (buf, INSN_SIZE) & 0xff7fff00; | |
5428 | newval |= (value >> 2) | (sign ? INDEX_UP : 0); | |
5429 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5430 | break; | |
5431 | ||
5432 | case BFD_RELOC_ARM_THUMB_OFFSET: | |
5433 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5434 | /* Exactly what ranges, and where the offset is inserted depends on | |
5435 | the type of instruction, we can establish this from the top 4 bits */ | |
5436 | switch (newval >> 12) | |
5437 | { | |
5438 | case 4: /* PC load */ | |
5439 | /* Thumb PC loads are somewhat odd, bit 1 of the PC is | |
5440 | forced to zero for these loads, so we will need to round | |
5441 | up the offset if the instruction address is not word | |
5442 | aligned (since the final address produced must be, and | |
5443 | we can only describe word-aligned immediate offsets). */ | |
5444 | ||
5445 | if ((fixP->fx_frag->fr_address + fixP->fx_where + value) & 3) | |
5446 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5447 | _("Invalid offset, target not word aligned (0x%08X)"), | |
5448 | (unsigned int)(fixP->fx_frag->fr_address + fixP->fx_where + value)); | |
5449 | ||
5450 | if ((value + 2) & ~0x3fe) | |
5451 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5452 | _("Invalid offset")); | |
5453 | ||
5454 | /* Round up, since pc will be rounded down. */ | |
5455 | newval |= (value + 2) >> 2; | |
5456 | break; | |
5457 | ||
5458 | case 9: /* SP load/store */ | |
5459 | if (value & ~0x3fc) | |
5460 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5461 | _("Invalid offset")); | |
5462 | newval |= value >> 2; | |
5463 | break; | |
5464 | ||
5465 | case 6: /* Word load/store */ | |
5466 | if (value & ~0x7c) | |
5467 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5468 | _("Invalid offset")); | |
5469 | newval |= value << 4; /* 6 - 2 */ | |
5470 | break; | |
5471 | ||
5472 | case 7: /* Byte load/store */ | |
5473 | if (value & ~0x1f) | |
5474 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5475 | _("Invalid offset")); | |
5476 | newval |= value << 6; | |
5477 | break; | |
5478 | ||
5479 | case 8: /* Halfword load/store */ | |
5480 | if (value & ~0x3e) | |
5481 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5482 | _("Invalid offset")); | |
5483 | newval |= value << 5; /* 6 - 1 */ | |
5484 | break; | |
5485 | ||
5486 | default: | |
5487 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5488 | "Unable to process relocation for thumb opcode: %x", newval); | |
5489 | break; | |
5490 | } | |
5491 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5492 | break; | |
5493 | ||
5494 | case BFD_RELOC_ARM_THUMB_ADD: | |
5495 | /* This is a complicated relocation, since we use it for all of | |
5496 | the following immediate relocations: | |
5497 | 3bit ADD/SUB | |
5498 | 8bit ADD/SUB | |
5499 | 9bit ADD/SUB SP word-aligned | |
5500 | 10bit ADD PC/SP word-aligned | |
5501 | ||
5502 | The type of instruction being processed is encoded in the | |
5503 | instruction field: | |
5504 | 0x8000 SUB | |
5505 | 0x00F0 Rd | |
5506 | 0x000F Rs | |
5507 | */ | |
5508 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5509 | { | |
5510 | int rd = (newval >> 4) & 0xf; | |
5511 | int rs = newval & 0xf; | |
5512 | int subtract = newval & 0x8000; | |
5513 | ||
5514 | if (rd == REG_SP) | |
5515 | { | |
5516 | if (value & ~0x1fc) | |
5517 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5518 | _("Invalid immediate for stack address calculation")); | |
5519 | newval = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; | |
5520 | newval |= value >> 2; | |
5521 | } | |
5522 | else if (rs == REG_PC || rs == REG_SP) | |
5523 | { | |
5524 | if (subtract || | |
5525 | value & ~0x3fc) | |
5526 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5527 | _("Invalid immediate for address calculation (value = 0x%08X)"), value); | |
5528 | newval = (rs == REG_PC ? T_OPCODE_ADD_PC : T_OPCODE_ADD_SP); | |
5529 | newval |= rd << 8; | |
5530 | newval |= value >> 2; | |
5531 | } | |
5532 | else if (rs == rd) | |
5533 | { | |
5534 | if (value & ~0xff) | |
5535 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5536 | _("Invalid 8bit immediate")); | |
5537 | newval = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; | |
5538 | newval |= (rd << 8) | value; | |
5539 | } | |
5540 | else | |
5541 | { | |
5542 | if (value & ~0x7) | |
5543 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5544 | _("Invalid 3bit immediate")); | |
5545 | newval = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; | |
5546 | newval |= rd | (rs << 3) | (value << 6); | |
5547 | } | |
5548 | } | |
5549 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5550 | break; | |
5551 | ||
5552 | case BFD_RELOC_ARM_THUMB_IMM: | |
5553 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5554 | switch (newval >> 11) | |
5555 | { | |
5556 | case 0x04: /* 8bit immediate MOV */ | |
5557 | case 0x05: /* 8bit immediate CMP */ | |
5558 | if (value < 0 || value > 255) | |
5559 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5560 | _("Invalid immediate: %d is too large"), value); | |
5561 | newval |= value; | |
5562 | break; | |
5563 | ||
5564 | default: | |
5565 | abort (); | |
5566 | } | |
5567 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5568 | break; | |
5569 | ||
5570 | case BFD_RELOC_ARM_THUMB_SHIFT: | |
5571 | /* 5bit shift value (0..31) */ | |
5572 | if (value < 0 || value > 31) | |
5573 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5574 | _("Illegal Thumb shift value: %d"), value); | |
5575 | newval = md_chars_to_number (buf, THUMB_SIZE) & 0xf03f; | |
5576 | newval |= value << 6; | |
5577 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5578 | break; | |
5579 | ||
5580 | case BFD_RELOC_VTABLE_INHERIT: | |
5581 | case BFD_RELOC_VTABLE_ENTRY: | |
5582 | fixP->fx_done = 0; | |
5583 | return 1; | |
5584 | ||
5585 | case BFD_RELOC_NONE: | |
5586 | default: | |
5587 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5588 | _("Bad relocation fixup type (%d)\n"), fixP->fx_r_type); | |
5589 | } | |
5590 | ||
5591 | return 1; | |
5592 | } | |
5593 | ||
5594 | /* Translate internal representation of relocation info to BFD target | |
5595 | format. */ | |
5596 | arelent * | |
5597 | tc_gen_reloc (section, fixp) | |
5598 | asection * section; | |
5599 | fixS * fixp; | |
5600 | { | |
5601 | arelent * reloc; | |
5602 | bfd_reloc_code_real_type code; | |
5603 | ||
5604 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
5605 | ||
174419c1 ILT |
5606 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
5607 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
252b5132 RH |
5608 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
5609 | ||
5610 | /* @@ Why fx_addnumber sometimes and fx_offset other times? */ | |
5611 | #ifndef OBJ_ELF | |
5612 | if (fixp->fx_pcrel == 0) | |
5613 | reloc->addend = fixp->fx_offset; | |
5614 | else | |
5615 | reloc->addend = fixp->fx_offset = reloc->address; | |
5616 | #else /* OBJ_ELF */ | |
5617 | reloc->addend = fixp->fx_offset; | |
5618 | #endif | |
5619 | ||
5620 | switch (fixp->fx_r_type) | |
5621 | { | |
5622 | case BFD_RELOC_8: | |
5623 | if (fixp->fx_pcrel) | |
5624 | { | |
5625 | code = BFD_RELOC_8_PCREL; | |
5626 | break; | |
5627 | } | |
5628 | ||
5629 | case BFD_RELOC_16: | |
5630 | if (fixp->fx_pcrel) | |
5631 | { | |
5632 | code = BFD_RELOC_16_PCREL; | |
5633 | break; | |
5634 | } | |
5635 | ||
5636 | case BFD_RELOC_32: | |
5637 | if (fixp->fx_pcrel) | |
5638 | { | |
5639 | code = BFD_RELOC_32_PCREL; | |
5640 | break; | |
5641 | } | |
5642 | ||
5643 | case BFD_RELOC_ARM_PCREL_BRANCH: | |
5644 | case BFD_RELOC_RVA: | |
5645 | case BFD_RELOC_THUMB_PCREL_BRANCH9: | |
5646 | case BFD_RELOC_THUMB_PCREL_BRANCH12: | |
5647 | case BFD_RELOC_THUMB_PCREL_BRANCH23: | |
5648 | case BFD_RELOC_VTABLE_ENTRY: | |
5649 | case BFD_RELOC_VTABLE_INHERIT: | |
5650 | code = fixp->fx_r_type; | |
5651 | break; | |
5652 | ||
5653 | case BFD_RELOC_ARM_LITERAL: | |
5654 | case BFD_RELOC_ARM_HWLITERAL: | |
5655 | /* If this is called then the a literal has been referenced across | |
5656 | a section boundry - possibly due to an implicit dump */ | |
5657 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5658 | _("Literal referenced across section boundry (Implicit dump?)")); | |
5659 | return NULL; | |
5660 | ||
5661 | case BFD_RELOC_ARM_GOTPC: | |
5662 | assert (fixp->fx_pcrel != 0); | |
5663 | code = fixp->fx_r_type; | |
5664 | code = BFD_RELOC_32_PCREL; | |
5665 | break; | |
5666 | ||
5667 | #ifdef OBJ_ELF | |
5668 | case BFD_RELOC_ARM_GOT32: | |
5669 | case BFD_RELOC_ARM_GOTOFF: | |
5670 | case BFD_RELOC_ARM_PLT32: | |
5671 | code = fixp->fx_r_type; | |
5672 | break; | |
5673 | #endif | |
5674 | ||
5675 | case BFD_RELOC_ARM_IMMEDIATE: | |
5676 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5677 | _("Internal_relocation (type %d) not fixed up (IMMEDIATE)"), | |
5678 | fixp->fx_r_type); | |
5679 | return NULL; | |
5680 | ||
5681 | case BFD_RELOC_ARM_OFFSET_IMM: | |
5682 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5683 | _("Internal_relocation (type %d) not fixed up (OFFSET_IMM)"), | |
5684 | fixp->fx_r_type); | |
5685 | return NULL; | |
5686 | ||
5687 | default: | |
5688 | { | |
5689 | char * type; | |
5690 | switch (fixp->fx_r_type) | |
5691 | { | |
5692 | case BFD_RELOC_ARM_IMMEDIATE: type = "IMMEDIATE"; break; | |
5693 | case BFD_RELOC_ARM_OFFSET_IMM: type = "OFFSET_IMM"; break; | |
5694 | case BFD_RELOC_ARM_OFFSET_IMM8: type = "OFFSET_IMM8"; break; | |
5695 | case BFD_RELOC_ARM_SHIFT_IMM: type = "SHIFT_IMM"; break; | |
5696 | case BFD_RELOC_ARM_SWI: type = "SWI"; break; | |
5697 | case BFD_RELOC_ARM_MULTI: type = "MULTI"; break; | |
5698 | case BFD_RELOC_ARM_CP_OFF_IMM: type = "CP_OFF_IMM"; break; | |
5699 | case BFD_RELOC_ARM_THUMB_ADD: type = "THUMB_ADD"; break; | |
5700 | case BFD_RELOC_ARM_THUMB_SHIFT: type = "THUMB_SHIFT"; break; | |
5701 | case BFD_RELOC_ARM_THUMB_IMM: type = "THUMB_IMM"; break; | |
5702 | case BFD_RELOC_ARM_THUMB_OFFSET: type = "THUMB_OFFSET"; break; | |
5703 | default: type = "<unknown>"; break; | |
5704 | } | |
5705 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5706 | _("Can not represent %s relocation in this object file format (%d)"), | |
5707 | type, fixp->fx_pcrel); | |
5708 | return NULL; | |
5709 | } | |
5710 | } | |
5711 | ||
5712 | #ifdef OBJ_ELF | |
5713 | if (code == BFD_RELOC_32_PCREL | |
5714 | && GOT_symbol | |
5715 | && fixp->fx_addsy == GOT_symbol) | |
5716 | code = BFD_RELOC_ARM_GOTPC; | |
5717 | #endif | |
5718 | ||
5719 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
5720 | ||
5721 | if (reloc->howto == NULL) | |
5722 | { | |
5723 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5724 | _("Can not represent %s relocation in this object file format"), | |
5725 | bfd_get_reloc_code_name (code)); | |
5726 | return NULL; | |
5727 | } | |
5728 | ||
5729 | return reloc; | |
5730 | } | |
5731 | ||
5732 | int | |
5733 | md_estimate_size_before_relax (fragP, segtype) | |
5734 | fragS * fragP; | |
5735 | segT segtype; | |
5736 | { | |
5737 | as_fatal (_("md_estimate_size_before_relax\n")); | |
5738 | return 1; | |
5739 | } | |
5740 | ||
5741 | static void | |
5742 | output_inst (str) | |
5743 | char * str; | |
5744 | { | |
5745 | char * to = NULL; | |
5746 | ||
5747 | if (inst.error) | |
5748 | { | |
5749 | as_bad (inst.error); | |
5750 | return; | |
5751 | } | |
5752 | ||
5753 | to = frag_more (inst.size); | |
5754 | if (thumb_mode && (inst.size > THUMB_SIZE)) | |
5755 | { | |
5756 | assert (inst.size == (2 * THUMB_SIZE)); | |
5757 | md_number_to_chars (to, inst.instruction >> 16, THUMB_SIZE); | |
5758 | md_number_to_chars (to + 2, inst.instruction, THUMB_SIZE); | |
5759 | } | |
5760 | else | |
5761 | md_number_to_chars (to, inst.instruction, inst.size); | |
5762 | ||
5763 | if (inst.reloc.type != BFD_RELOC_NONE) | |
5764 | fix_new_arm (frag_now, to - frag_now->fr_literal, | |
5765 | inst.size, & inst.reloc.exp, inst.reloc.pc_rel, | |
5766 | inst.reloc.type); | |
5767 | ||
5768 | return; | |
5769 | } | |
5770 | ||
5771 | void | |
5772 | md_assemble (str) | |
5773 | char * str; | |
5774 | { | |
5775 | char c; | |
5776 | char * p; | |
5777 | char * q; | |
5778 | char * start; | |
5779 | ||
5780 | /* Align the instruction. | |
5781 | This may not be the right thing to do but ... */ | |
5782 | /* arm_align (2, 0); */ | |
5783 | listing_prev_line (); /* Defined in listing.h */ | |
5784 | ||
5785 | /* Align the previous label if needed. */ | |
5786 | if (last_label_seen != NULL) | |
5787 | { | |
174419c1 | 5788 | symbol_set_frag (last_label_seen, frag_now); |
252b5132 RH |
5789 | S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ()); |
5790 | S_SET_SEGMENT (last_label_seen, now_seg); | |
5791 | } | |
5792 | ||
5793 | memset (&inst, '\0', sizeof (inst)); | |
5794 | inst.reloc.type = BFD_RELOC_NONE; | |
5795 | ||
5796 | if (*str == ' ') | |
5797 | str++; /* Skip leading white space */ | |
5798 | ||
5799 | /* Scan up to the end of the op-code, which must end in white space or | |
5800 | end of string. */ | |
5801 | for (start = p = str; *p != '\0'; p++) | |
5802 | if (*p == ' ') | |
5803 | break; | |
5804 | ||
5805 | if (p == str) | |
5806 | { | |
5807 | as_bad (_("No operator -- statement `%s'\n"), str); | |
5808 | return; | |
5809 | } | |
5810 | ||
5811 | if (thumb_mode) | |
5812 | { | |
5813 | CONST struct thumb_opcode *opcode; | |
5814 | ||
5815 | c = *p; | |
5816 | *p = '\0'; | |
5817 | opcode = (CONST struct thumb_opcode *) hash_find (arm_tops_hsh, str); | |
5818 | *p = c; | |
5819 | if (opcode) | |
5820 | { | |
5821 | inst.instruction = opcode->value; | |
5822 | inst.size = opcode->size; | |
5823 | (*opcode->parms)(p); | |
5824 | output_inst (start); | |
5825 | return; | |
5826 | } | |
5827 | } | |
5828 | else | |
5829 | { | |
5830 | CONST struct asm_opcode *opcode; | |
5831 | ||
5832 | inst.size = INSN_SIZE; | |
5833 | /* p now points to the end of the opcode, probably white space, but we | |
5834 | have to break the opcode up in case it contains condionals and flags; | |
5835 | keep trying with progressively smaller basic instructions until one | |
5836 | matches, or we run out of opcode. */ | |
5837 | q = (p - str > LONGEST_INST) ? str + LONGEST_INST : p; | |
5838 | for (; q != str; q--) | |
5839 | { | |
5840 | c = *q; | |
5841 | *q = '\0'; | |
5842 | opcode = (CONST struct asm_opcode *) hash_find (arm_ops_hsh, str); | |
5843 | *q = c; | |
5844 | if (opcode && opcode->template) | |
5845 | { | |
5846 | unsigned long flag_bits = 0; | |
5847 | char *r; | |
5848 | ||
5849 | /* Check that this instruction is supported for this CPU */ | |
5850 | if ((opcode->variants & cpu_variant) == 0) | |
5851 | goto try_shorter; | |
5852 | ||
5853 | inst.instruction = opcode->value; | |
5854 | if (q == p) /* Just a simple opcode */ | |
5855 | { | |
5856 | if (opcode->comp_suffix != 0) | |
5857 | as_bad (_("Opcode `%s' must have suffix from <%s>\n"), str, | |
5858 | opcode->comp_suffix); | |
5859 | else | |
5860 | { | |
5861 | inst.instruction |= COND_ALWAYS; | |
5862 | (*opcode->parms)(q, 0); | |
5863 | } | |
5864 | output_inst (start); | |
5865 | return; | |
5866 | } | |
5867 | ||
5868 | /* Now check for a conditional */ | |
5869 | r = q; | |
5870 | if (p - r >= 2) | |
5871 | { | |
5872 | CONST struct asm_cond *cond; | |
5873 | char d = *(r + 2); | |
5874 | ||
5875 | *(r + 2) = '\0'; | |
5876 | cond = (CONST struct asm_cond *) hash_find (arm_cond_hsh, r); | |
5877 | *(r + 2) = d; | |
5878 | if (cond) | |
5879 | { | |
5880 | if (cond->value == 0xf0000000) | |
5881 | as_tsktsk ( | |
5882 | _("Warning: Use of the 'nv' conditional is deprecated\n")); | |
5883 | ||
5884 | inst.instruction |= cond->value; | |
5885 | r += 2; | |
5886 | } | |
5887 | else | |
5888 | inst.instruction |= COND_ALWAYS; | |
5889 | } | |
5890 | else | |
5891 | inst.instruction |= COND_ALWAYS; | |
5892 | ||
5893 | /* if there is a compulsory suffix, it should come here, before | |
5894 | any optional flags. */ | |
5895 | if (opcode->comp_suffix) | |
5896 | { | |
5897 | CONST char *s = opcode->comp_suffix; | |
5898 | ||
5899 | while (*s) | |
5900 | { | |
5901 | inst.suffix++; | |
5902 | if (*r == *s) | |
5903 | break; | |
5904 | s++; | |
5905 | } | |
5906 | ||
5907 | if (*s == '\0') | |
5908 | { | |
5909 | as_bad (_("Opcode `%s' must have suffix from <%s>\n"), str, | |
5910 | opcode->comp_suffix); | |
5911 | return; | |
5912 | } | |
5913 | ||
5914 | r++; | |
5915 | } | |
5916 | ||
5917 | /* The remainder, if any should now be flags for the instruction; | |
5918 | Scan these checking each one found with the opcode. */ | |
5919 | if (r != p) | |
5920 | { | |
5921 | char d; | |
5922 | CONST struct asm_flg *flag = opcode->flags; | |
5923 | ||
5924 | if (flag) | |
5925 | { | |
5926 | int flagno; | |
5927 | ||
5928 | d = *p; | |
5929 | *p = '\0'; | |
5930 | ||
5931 | for (flagno = 0; flag[flagno].template; flagno++) | |
5932 | { | |
5933 | if (streq (r, flag[flagno].template)) | |
5934 | { | |
5935 | flag_bits |= flag[flagno].set_bits; | |
5936 | break; | |
5937 | } | |
5938 | } | |
5939 | ||
5940 | *p = d; | |
5941 | if (! flag[flagno].template) | |
5942 | goto try_shorter; | |
5943 | } | |
5944 | else | |
5945 | goto try_shorter; | |
5946 | } | |
5947 | ||
5948 | (*opcode->parms) (p, flag_bits); | |
5949 | output_inst (start); | |
5950 | return; | |
5951 | } | |
5952 | ||
5953 | try_shorter: | |
5954 | ; | |
5955 | } | |
5956 | } | |
5957 | ||
5958 | /* It wasn't an instruction, but it might be a register alias of the form | |
5959 | alias .req reg | |
5960 | */ | |
5961 | q = p; | |
5962 | while (*q == ' ') | |
5963 | q++; | |
5964 | ||
5965 | c = *p; | |
5966 | *p = '\0'; | |
5967 | ||
5968 | if (*q && !strncmp (q, ".req ", 4)) | |
5969 | { | |
5970 | int reg; | |
5971 | char * copy_of_str = str; | |
5972 | char * r; | |
5973 | ||
5974 | q += 4; | |
5975 | while (*q == ' ') | |
5976 | q++; | |
5977 | ||
5978 | for (r = q; *r != '\0'; r++) | |
5979 | if (*r == ' ') | |
5980 | break; | |
5981 | ||
5982 | if (r != q) | |
5983 | { | |
5984 | int regnum; | |
5985 | char d = *r; | |
5986 | ||
5987 | *r = '\0'; | |
5988 | regnum = arm_reg_parse (& q); | |
5989 | *r = d; | |
5990 | ||
5991 | reg = arm_reg_parse (& str); | |
5992 | ||
5993 | if (reg == FAIL) | |
5994 | { | |
5995 | if (regnum != FAIL) | |
5996 | { | |
5997 | insert_reg_alias (str, regnum); | |
5998 | } | |
5999 | else | |
6000 | { | |
6001 | as_warn (_("register '%s' does not exist\n"), q); | |
6002 | } | |
6003 | } | |
6004 | else if (regnum != FAIL) | |
6005 | { | |
6006 | if (reg != regnum) | |
6007 | as_warn (_("ignoring redefinition of register alias '%s'"), copy_of_str ); | |
6008 | ||
6009 | /* Do not warn abpout redefinitions to the same alias. */ | |
6010 | } | |
6011 | else | |
6012 | as_warn (_("ignoring redefinition of register alias '%s' to non-existant register '%s'"), | |
6013 | copy_of_str, q); | |
6014 | } | |
6015 | else | |
6016 | as_warn (_("ignoring incomplete .req pseuso op")); | |
6017 | ||
6018 | *p = c; | |
6019 | return; | |
6020 | } | |
6021 | ||
6022 | *p = c; | |
6023 | as_bad (_("bad instruction `%s'"), start); | |
6024 | } | |
6025 | ||
6026 | /* | |
6027 | * md_parse_option | |
6028 | * Invocation line includes a switch not recognized by the base assembler. | |
6029 | * See if it's a processor-specific option. These are: | |
6030 | * Cpu variants, the arm part is optional: | |
6031 | * -m[arm]1 Currently not supported. | |
6032 | * -m[arm]2, -m[arm]250 Arm 2 and Arm 250 processor | |
6033 | * -m[arm]3 Arm 3 processor | |
6034 | * -m[arm]6[xx], Arm 6 processors | |
6035 | * -m[arm]7[xx][t][[d]m] Arm 7 processors | |
6036 | * -mstrongarm[110] Arm 8 processors | |
6037 | * -mall All (except the ARM1) | |
6038 | * FP variants: | |
6039 | * -mfpa10, -mfpa11 FPA10 and 11 co-processor instructions | |
6040 | * -mfpe-old (No float load/store multiples) | |
6041 | * -mno-fpu Disable all floating point instructions | |
6042 | * Run-time endian selection: | |
6043 | * -EB big endian cpu | |
6044 | * -EL little endian cpu | |
6045 | * ARM Procedure Calling Standard: | |
6046 | * -mapcs-32 32 bit APCS | |
6047 | * -mapcs-26 26 bit APCS | |
6048 | * -mapcs-float Pass floats in float regs | |
6049 | * -mapcs-reentrant Position independent code | |
6050 | * -mthumb-interwork Code supports Arm/Thumb interworking | |
6051 | * -moabi Old ELF ABI | |
6052 | */ | |
6053 | ||
6054 | CONST char * md_shortopts = "m:k"; | |
6055 | struct option md_longopts[] = | |
6056 | { | |
6057 | #ifdef ARM_BI_ENDIAN | |
6058 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
6059 | {"EB", no_argument, NULL, OPTION_EB}, | |
6060 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
6061 | {"EL", no_argument, NULL, OPTION_EL}, | |
6062 | #ifdef OBJ_ELF | |
6063 | #define OPTION_OABI (OPTION_MD_BASE +2) | |
6064 | {"oabi", no_argument, NULL, OPTION_OABI}, | |
6065 | #endif | |
6066 | #endif | |
6067 | {NULL, no_argument, NULL, 0} | |
6068 | }; | |
6069 | size_t md_longopts_size = sizeof (md_longopts); | |
6070 | ||
6071 | int | |
6072 | md_parse_option (c, arg) | |
6073 | int c; | |
6074 | char * arg; | |
6075 | { | |
6076 | char * str = arg; | |
6077 | ||
6078 | switch (c) | |
6079 | { | |
6080 | #ifdef ARM_BI_ENDIAN | |
6081 | case OPTION_EB: | |
6082 | target_big_endian = 1; | |
6083 | break; | |
6084 | case OPTION_EL: | |
6085 | target_big_endian = 0; | |
6086 | break; | |
6087 | #endif | |
6088 | ||
6089 | case 'm': | |
6090 | switch (*str) | |
6091 | { | |
6092 | case 'f': | |
6093 | if (streq (str, "fpa10")) | |
6094 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA10; | |
6095 | else if (streq (str, "fpa11")) | |
6096 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA11; | |
6097 | else if (streq (str, "fpe-old")) | |
6098 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_CORE; | |
6099 | else | |
6100 | goto bad; | |
6101 | break; | |
6102 | ||
6103 | case 'n': | |
6104 | if (streq (str, "no-fpu")) | |
6105 | cpu_variant &= ~FPU_ALL; | |
6106 | break; | |
6107 | ||
6108 | #ifdef OBJ_ELF | |
6109 | case 'o': | |
6110 | if (streq (str, "oabi")) | |
6111 | target_oabi = true; | |
6112 | break; | |
6113 | #endif | |
6114 | ||
6115 | case 't': | |
6116 | /* Limit assembler to generating only Thumb instructions: */ | |
6117 | if (streq (str, "thumb")) | |
6118 | { | |
6119 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_THUMB; | |
6120 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_NONE; | |
6121 | thumb_mode = 1; | |
6122 | } | |
6123 | else if (streq (str, "thumb-interwork")) | |
6124 | { | |
6125 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_THUMB | ARM_ARCHv4; | |
6126 | #if defined OBJ_COFF || defined OBJ_ELF | |
6127 | support_interwork = true; | |
6128 | #endif | |
6129 | } | |
6130 | else | |
6131 | goto bad; | |
6132 | break; | |
6133 | ||
6134 | default: | |
6135 | if (streq (str, "all")) | |
6136 | { | |
6137 | cpu_variant = ARM_ALL | FPU_ALL; | |
6138 | return 1; | |
6139 | } | |
6140 | #if defined OBJ_COFF || defined OBJ_ELF | |
6141 | if (! strncmp (str, "apcs-", 5)) | |
6142 | { | |
6143 | /* GCC passes on all command line options starting "-mapcs-..." | |
6144 | to us, so we must parse them here. */ | |
6145 | ||
6146 | str += 5; | |
6147 | ||
6148 | if (streq (str, "32")) | |
6149 | { | |
6150 | uses_apcs_26 = false; | |
6151 | return 1; | |
6152 | } | |
6153 | else if (streq (str, "26")) | |
6154 | { | |
6155 | uses_apcs_26 = true; | |
6156 | return 1; | |
6157 | } | |
6158 | else if (streq (str, "frame")) | |
6159 | { | |
6160 | /* Stack frames are being generated - does not affect | |
6161 | linkage of code. */ | |
6162 | return 1; | |
6163 | } | |
6164 | else if (streq (str, "stack-check")) | |
6165 | { | |
6166 | /* Stack checking is being performed - does not affect | |
6167 | linkage, but does require that the functions | |
6168 | __rt_stkovf_split_small and __rt_stkovf_split_big be | |
6169 | present in the final link. */ | |
6170 | ||
6171 | return 1; | |
6172 | } | |
6173 | else if (streq (str, "float")) | |
6174 | { | |
6175 | /* Floating point arguments are being passed in the floating | |
6176 | point registers. This does affect linking, since this | |
6177 | version of the APCS is incompatible with the version that | |
6178 | passes floating points in the integer registers. */ | |
6179 | ||
6180 | uses_apcs_float = true; | |
6181 | return 1; | |
6182 | } | |
6183 | else if (streq (str, "reentrant")) | |
6184 | { | |
6185 | /* Reentrant code has been generated. This does affect | |
6186 | linking, since there is no point in linking reentrant/ | |
6187 | position independent code with absolute position code. */ | |
6188 | pic_code = true; | |
6189 | return 1; | |
6190 | } | |
6191 | ||
6192 | as_bad (_("Unrecognised APCS switch -m%s"), arg); | |
6193 | return 0; | |
6194 | } | |
6195 | #endif | |
6196 | /* Strip off optional "arm" */ | |
6197 | if (! strncmp (str, "arm", 3)) | |
6198 | str += 3; | |
6199 | ||
6200 | switch (*str) | |
6201 | { | |
6202 | case '1': | |
6203 | if (streq (str, "1")) | |
6204 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_1; | |
6205 | else | |
6206 | goto bad; | |
6207 | break; | |
6208 | ||
6209 | case '2': | |
6210 | if (streq (str, "2")) | |
6211 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; | |
6212 | else if (streq (str, "250")) | |
6213 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_250; | |
6214 | else | |
6215 | goto bad; | |
6216 | break; | |
6217 | ||
6218 | case '3': | |
6219 | if (streq (str, "3")) | |
6220 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; | |
6221 | else | |
6222 | goto bad; | |
6223 | break; | |
6224 | ||
6225 | case '6': | |
6226 | switch (strtol (str, NULL, 10)) | |
6227 | { | |
6228 | case 6: | |
6229 | case 60: | |
6230 | case 600: | |
6231 | case 610: | |
6232 | case 620: | |
6233 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_6; | |
6234 | break; | |
6235 | default: | |
6236 | goto bad; | |
6237 | } | |
6238 | break; | |
6239 | ||
6240 | case '7': | |
6241 | switch (strtol (str, & str, 10)) /* Eat the processor name */ | |
6242 | { | |
6243 | case 7: | |
6244 | case 70: | |
6245 | case 700: | |
6246 | case 710: | |
6247 | case 7100: | |
6248 | case 7500: | |
6249 | break; | |
6250 | default: | |
6251 | goto bad; | |
6252 | } | |
6253 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; | |
6254 | for (; *str; str++) | |
6255 | { | |
6256 | switch (* str) | |
6257 | { | |
6258 | case 't': | |
6259 | cpu_variant |= (ARM_THUMB | ARM_ARCHv4); | |
6260 | break; | |
6261 | ||
6262 | case 'm': | |
6263 | cpu_variant |= ARM_LONGMUL; | |
6264 | break; | |
6265 | ||
6266 | case 'f': /* fe => fp enabled cpu. */ | |
6267 | if (str[1] == 'e') | |
6268 | ++ str; | |
6269 | else | |
6270 | goto bad; | |
6271 | ||
6272 | case 'c': /* Left over from 710c processor name. */ | |
6273 | case 'd': /* Debug */ | |
6274 | case 'i': /* Embedded ICE */ | |
6275 | /* Included for completeness in ARM processor naming. */ | |
6276 | break; | |
6277 | ||
6278 | default: | |
6279 | goto bad; | |
6280 | } | |
6281 | } | |
6282 | break; | |
6283 | ||
6284 | case '8': | |
6285 | if (streq (str, "8") || streq (str, "810")) | |
6286 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCHv4 | ARM_LONGMUL; | |
6287 | else | |
6288 | goto bad; | |
6289 | break; | |
6290 | ||
6291 | case '9': | |
6292 | if (streq (str, "9")) | |
6293 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCHv4 | ARM_LONGMUL; | |
6294 | else if (streq (str, "9tdmi")) | |
6295 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCHv4 | ARM_LONGMUL | ARM_THUMB; | |
6296 | else | |
6297 | goto bad; | |
6298 | break; | |
6299 | ||
6300 | case 's': | |
6301 | if (streq (str, "strongarm") | |
6302 | || streq (str, "strongarm110") | |
6303 | || streq (str, "strongarm1100")) | |
6304 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCHv4 | ARM_LONGMUL; | |
6305 | else | |
6306 | goto bad; | |
6307 | break; | |
6308 | ||
6309 | case 'v': | |
6310 | /* Select variant based on architecture rather than processor */ | |
6311 | switch (*++str) | |
6312 | { | |
6313 | case '2': | |
6314 | switch (*++str) | |
6315 | { | |
6316 | case 'a': cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; break; | |
6317 | case 0: cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; break; | |
6318 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6319 | } | |
6320 | break; | |
6321 | ||
6322 | case '3': | |
6323 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; | |
6324 | ||
6325 | switch (*++str) | |
6326 | { | |
6327 | case 'm': cpu_variant |= ARM_LONGMUL; break; | |
6328 | case 0: break; | |
6329 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6330 | } | |
6331 | break; | |
6332 | ||
6333 | case '4': | |
6334 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCHv4; | |
6335 | ||
6336 | switch (*++str) | |
6337 | { | |
6338 | case 't': cpu_variant |= ARM_THUMB; break; | |
6339 | case 0: break; | |
6340 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6341 | } | |
6342 | break; | |
6343 | ||
6344 | default: | |
6345 | as_bad (_("Invalid architecture variant -m%s"), arg); | |
6346 | break; | |
6347 | } | |
6348 | break; | |
6349 | ||
6350 | default: | |
6351 | bad: | |
6352 | as_bad (_("Invalid processor variant -m%s"), arg); | |
6353 | return 0; | |
6354 | } | |
6355 | } | |
6356 | break; | |
6357 | ||
6358 | case 'k': | |
6359 | pic_code = 1; | |
6360 | break; | |
6361 | ||
6362 | default: | |
6363 | return 0; | |
6364 | } | |
6365 | ||
6366 | return 1; | |
6367 | } | |
6368 | ||
6369 | void | |
6370 | md_show_usage (fp) | |
6371 | FILE * fp; | |
6372 | { | |
6373 | fprintf (fp, | |
6374 | _("\ | |
6375 | ARM Specific Assembler Options:\n\ | |
6376 | -m[arm][<processor name>] select processor variant\n\ | |
6377 | -m[arm]v[2|2a|3|3m|4|4t] select architecture variant\n\ | |
6378 | -mthumb only allow Thumb instructions\n\ | |
6379 | -mthumb-interwork mark the assembled code as supporting interworking\n\ | |
6380 | -mall allow any instruction\n\ | |
6381 | -mfpa10, -mfpa11 select floating point architecture\n\ | |
6382 | -mfpe-old don't allow floating-point multiple instructions\n\ | |
6383 | -mno-fpu don't allow any floating-point instructions.\n")); | |
6384 | fprintf (fp, | |
6385 | _("\ | |
6386 | -k generate PIC code.\n")); | |
6387 | #if defined OBJ_COFF || defined OBJ_ELF | |
6388 | fprintf (fp, | |
6389 | _("\ | |
6390 | -mapcs-32, -mapcs-26 specify which ARM Procedure Calling Standard to use\n")); | |
6391 | fprintf (fp, | |
6392 | _("\ | |
6393 | -mapcs-float floating point args are passed in FP regs\n")); | |
6394 | fprintf (fp, | |
6395 | _("\ | |
6396 | -mapcs-reentrant the code is position independent/reentrant\n")); | |
6397 | #endif | |
6398 | #ifdef OBJ_ELF | |
6399 | fprintf (fp, | |
6400 | _("\ | |
6401 | -moabi support the old ELF ABI\n")); | |
6402 | #endif | |
6403 | #ifdef ARM_BI_ENDIAN | |
6404 | fprintf (fp, | |
6405 | _("\ | |
6406 | -EB assemble code for a big endian cpu\n\ | |
6407 | -EL assemble code for a little endian cpu\n")); | |
6408 | #endif | |
6409 | } | |
6410 | ||
6411 | /* We need to be able to fix up arbitrary expressions in some statements. | |
6412 | This is so that we can handle symbols that are an arbitrary distance from | |
6413 | the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask), | |
6414 | which returns part of an address in a form which will be valid for | |
6415 | a data instruction. We do this by pushing the expression into a symbol | |
6416 | in the expr_section, and creating a fix for that. */ | |
6417 | ||
6418 | static void | |
6419 | fix_new_arm (frag, where, size, exp, pc_rel, reloc) | |
6420 | fragS * frag; | |
6421 | int where; | |
6422 | short int size; | |
6423 | expressionS * exp; | |
6424 | int pc_rel; | |
6425 | int reloc; | |
6426 | { | |
6427 | fixS * new_fix; | |
6428 | arm_fix_data * arm_data; | |
6429 | ||
6430 | switch (exp->X_op) | |
6431 | { | |
6432 | case O_constant: | |
6433 | case O_symbol: | |
6434 | case O_add: | |
6435 | case O_subtract: | |
6436 | new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc); | |
6437 | break; | |
6438 | ||
6439 | default: | |
6440 | new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0, | |
6441 | pc_rel, reloc); | |
6442 | break; | |
6443 | } | |
6444 | ||
6445 | /* Mark whether the fix is to a THUMB instruction, or an ARM instruction */ | |
6446 | arm_data = (arm_fix_data *) obstack_alloc (& notes, sizeof (arm_fix_data)); | |
6447 | new_fix->tc_fix_data = (PTR) arm_data; | |
6448 | arm_data->thumb_mode = thumb_mode; | |
6449 | ||
6450 | return; | |
6451 | } | |
6452 | ||
6453 | ||
6454 | /* | |
6455 | * This fix_new is called by cons via TC_CONS_FIX_NEW | |
6456 | * | |
6457 | * We check the expression to see if it is of the form | |
6458 | * __GLOBAL_OFFSET_TABLE + ??? | |
6459 | * If it is then this is a PC relative reference to the GOT. | |
6460 | * i.e. | |
6461 | * ldr sl, L1 | |
6462 | * add sl, pc, sl | |
6463 | * L2: | |
6464 | * ... | |
6465 | * L1: | |
6466 | * .word __GLOBAL_OFFSET_TABLE + (. - (L2 + 4)) | |
6467 | * | |
6468 | * In this case use a reloc type BFD_RELOC_ARM_GOTPC instead of the | |
6469 | * normal BFD_RELOC_{16,32,64} | |
6470 | */ | |
6471 | ||
6472 | void | |
6473 | cons_fix_new_arm (frag, where, size, exp) | |
6474 | fragS * frag; | |
6475 | int where; | |
6476 | int size; | |
6477 | expressionS * exp; | |
6478 | { | |
6479 | bfd_reloc_code_real_type type; | |
6480 | int pcrel = 0; | |
6481 | ||
6482 | /* Pick a reloc ... | |
6483 | * | |
6484 | * @@ Should look at CPU word size. | |
6485 | */ | |
6486 | switch (size) | |
6487 | { | |
6488 | case 2: | |
6489 | type = BFD_RELOC_16; | |
6490 | break; | |
6491 | case 4: | |
6492 | default: | |
6493 | type = BFD_RELOC_32; | |
6494 | break; | |
6495 | case 8: | |
6496 | type = BFD_RELOC_64; | |
6497 | break; | |
6498 | } | |
6499 | ||
6500 | /* Look for possible GOTPC reloc */ | |
6501 | ||
6502 | /* | |
6503 | * Look for pic assembler and 'undef symbol + expr symbol' expression | |
6504 | * and a 32 bit size. | |
6505 | */ | |
6506 | ||
6507 | fix_new_exp (frag, where, (int) size, exp, pcrel, type); | |
6508 | } | |
6509 | ||
6510 | /* A good place to do this, although this was probably not intended | |
6511 | * for this kind of use. We need to dump the literal pool before | |
6512 | * references are made to a null symbol pointer. */ | |
6513 | void | |
6514 | arm_cleanup () | |
6515 | { | |
6516 | if (current_poolP != NULL) | |
6517 | { | |
6518 | subseg_set (text_section, 0); /* Put it at the end of text section */ | |
6519 | s_ltorg (0); | |
6520 | listing_prev_line (); | |
6521 | } | |
6522 | } | |
6523 | ||
6524 | void | |
6525 | arm_start_line_hook () | |
6526 | { | |
6527 | last_label_seen = NULL; | |
6528 | } | |
6529 | ||
6530 | void | |
6531 | arm_frob_label (sym) | |
6532 | symbolS * sym; | |
6533 | { | |
6534 | last_label_seen = sym; | |
6535 | ||
6536 | ARM_SET_THUMB (sym, thumb_mode); | |
6537 | ||
6538 | #if defined OBJ_COFF || defined OBJ_ELF | |
6539 | ARM_SET_INTERWORK (sym, support_interwork); | |
6540 | #endif | |
6541 | ||
6542 | if (label_is_thumb_function_name) | |
6543 | { | |
6544 | /* When the address of a Thumb function is taken the bottom | |
6545 | bit of that address should be set. This will allow | |
6546 | interworking between Arm and Thumb functions to work | |
6547 | correctly. */ | |
6548 | ||
6549 | THUMB_SET_FUNC (sym, 1); | |
6550 | ||
6551 | label_is_thumb_function_name = false; | |
6552 | } | |
6553 | } | |
6554 | ||
6555 | /* Adjust the symbol table. This marks Thumb symbols as distinct from | |
6556 | ARM ones. */ | |
6557 | ||
6558 | void | |
6559 | arm_adjust_symtab () | |
6560 | { | |
6561 | #ifdef OBJ_COFF | |
6562 | symbolS * sym; | |
6563 | ||
6564 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) | |
6565 | { | |
6566 | if (ARM_IS_THUMB (sym)) | |
6567 | { | |
6568 | if (THUMB_IS_FUNC (sym)) | |
6569 | { | |
6570 | /* Mark the symbol as a Thumb function. */ | |
6571 | if ( S_GET_STORAGE_CLASS (sym) == C_STAT | |
6572 | || S_GET_STORAGE_CLASS (sym) == C_LABEL) /* This can happen! */ | |
6573 | S_SET_STORAGE_CLASS (sym, C_THUMBSTATFUNC); | |
6574 | ||
6575 | else if (S_GET_STORAGE_CLASS (sym) == C_EXT) | |
6576 | S_SET_STORAGE_CLASS (sym, C_THUMBEXTFUNC); | |
6577 | else | |
6578 | as_bad (_("%s: unexpected function type: %d"), | |
6579 | S_GET_NAME (sym), S_GET_STORAGE_CLASS (sym)); | |
6580 | } | |
6581 | else switch (S_GET_STORAGE_CLASS (sym)) | |
6582 | { | |
6583 | case C_EXT: | |
6584 | S_SET_STORAGE_CLASS (sym, C_THUMBEXT); | |
6585 | break; | |
6586 | case C_STAT: | |
6587 | S_SET_STORAGE_CLASS (sym, C_THUMBSTAT); | |
6588 | break; | |
6589 | case C_LABEL: | |
6590 | S_SET_STORAGE_CLASS (sym, C_THUMBLABEL); | |
6591 | break; | |
6592 | default: /* do nothing */ | |
6593 | break; | |
6594 | } | |
6595 | } | |
6596 | ||
6597 | if (ARM_IS_INTERWORK (sym)) | |
6598 | coffsymbol(sym->bsym)->native->u.syment.n_flags = 0xFF; | |
6599 | } | |
6600 | #endif | |
6601 | #ifdef OBJ_ELF | |
6602 | symbolS * sym; | |
6603 | elf_symbol_type * elf_sym; | |
6604 | char bind; | |
6605 | ||
6606 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) | |
6607 | { | |
6608 | if (ARM_IS_THUMB (sym)) | |
6609 | { | |
6610 | if (THUMB_IS_FUNC (sym)) | |
6611 | { | |
174419c1 | 6612 | elf_sym = elf_symbol (symbol_get_bfdsym (sym)); |
252b5132 RH |
6613 | bind = ELF_ST_BIND (elf_sym); |
6614 | elf_sym->internal_elf_sym.st_info = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
6615 | } | |
6616 | } | |
6617 | } | |
6618 | #endif | |
6619 | } | |
6620 | ||
6621 | int | |
6622 | arm_data_in_code () | |
6623 | { | |
6624 | if (thumb_mode && ! strncmp (input_line_pointer + 1, "data:", 5)) | |
6625 | { | |
6626 | *input_line_pointer = '/'; | |
6627 | input_line_pointer += 5; | |
6628 | *input_line_pointer = 0; | |
6629 | return 1; | |
6630 | } | |
6631 | ||
6632 | return 0; | |
6633 | } | |
6634 | ||
6635 | char * | |
6636 | arm_canonicalize_symbol_name (name) | |
6637 | char * name; | |
6638 | { | |
6639 | int len; | |
6640 | ||
6641 | if (thumb_mode && (len = strlen (name)) > 5 | |
6642 | && streq (name + len - 5, "/data")) | |
6643 | { | |
6644 | *(name + len - 5) = 0; | |
6645 | } | |
6646 | ||
6647 | return name; | |
6648 | } | |
6649 | ||
6650 | boolean | |
6651 | arm_validate_fix (fixP) | |
6652 | fixS * fixP; | |
6653 | { | |
6654 | /* If the destination of the branch is a defined symbol which does not have | |
6655 | the THUMB_FUNC attribute, then we must be calling a function which has | |
6656 | the (interfacearm) attribute. We look for the Thumb entry point to that | |
6657 | function and change the branch to refer to that function instead. */ | |
6658 | if ( fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23 | |
6659 | && fixP->fx_addsy != NULL | |
6660 | && S_IS_DEFINED (fixP->fx_addsy) | |
6661 | && ! THUMB_IS_FUNC (fixP->fx_addsy)) | |
6662 | { | |
6663 | fixP->fx_addsy = find_real_start (fixP->fx_addsy); | |
6664 | return true; | |
6665 | } | |
6666 | ||
6667 | return false; | |
6668 | } | |
6669 | ||
6670 | #ifdef OBJ_ELF | |
6671 | /* Relocations against Thumb function names must be left unadjusted, | |
6672 | so that the linker can use this information to correctly set the | |
6673 | bottom bit of their addresses. The MIPS version of this function | |
6674 | also prevents relocations that are mips-16 specific, but I do not | |
6675 | know why it does this. | |
6676 | ||
6677 | FIXME: | |
6678 | There is one other problem that ought to be addressed here, but | |
6679 | which currently is not: Taking the address of a label (rather | |
6680 | than a function) and then later jumping to that address. Such | |
6681 | addresses also ought to have their bottom bit set (assuming that | |
6682 | they reside in Thumb code), but at the moment they will not. */ | |
6683 | ||
6684 | boolean | |
6685 | arm_fix_adjustable (fixP) | |
6686 | fixS * fixP; | |
6687 | { | |
6688 | ||
6689 | if (fixP->fx_addsy == NULL) | |
6690 | return 1; | |
6691 | ||
6692 | /* Prevent all adjustments to global symbols. */ | |
6693 | if (S_IS_EXTERN (fixP->fx_addsy)) | |
6694 | return 0; | |
6695 | ||
6696 | if (S_IS_WEAK (fixP->fx_addsy)) | |
6697 | return 0; | |
6698 | ||
6699 | if (THUMB_IS_FUNC (fixP->fx_addsy) | |
6700 | && fixP->fx_subsy == NULL) | |
6701 | return 0; | |
6702 | ||
6703 | /* We need the symbol name for the VTABLE entries */ | |
6704 | if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
6705 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
6706 | return 0; | |
6707 | ||
6708 | return 1; | |
6709 | } | |
6710 | ||
6711 | const char * | |
6712 | elf32_arm_target_format () | |
6713 | { | |
6714 | if (target_big_endian) | |
6715 | if (target_oabi) | |
6716 | return "elf32-bigarm-oabi"; | |
6717 | else | |
6718 | return "elf32-bigarm"; | |
6719 | else | |
6720 | if (target_oabi) | |
6721 | return "elf32-littlearm-oabi"; | |
6722 | else | |
6723 | return "elf32-littlearm"; | |
6724 | } | |
6725 | ||
6726 | void | |
6727 | armelf_frob_symbol (symp, puntp) | |
6728 | symbolS * symp; | |
6729 | int * puntp; | |
6730 | { | |
6731 | elf_frob_symbol (symp, puntp); | |
6732 | } | |
6733 | ||
6734 | int | |
6735 | arm_force_relocation (fixp) | |
6736 | struct fix * fixp; | |
6737 | { | |
6738 | if ( fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
6739 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY | |
6740 | || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH) | |
6741 | return 1; | |
6742 | ||
6743 | return 0; | |
6744 | } | |
6745 | ||
6746 | static bfd_reloc_code_real_type | |
6747 | arm_parse_reloc () | |
6748 | { | |
6749 | char id[16]; | |
6750 | char * ip; | |
6751 | int i; | |
6752 | static struct | |
6753 | { | |
6754 | char * str; | |
6755 | int len; | |
6756 | bfd_reloc_code_real_type reloc; | |
6757 | } | |
6758 | reloc_map[] = | |
6759 | { | |
6760 | #define MAP(str,reloc) { str, sizeof (str)-1, reloc } | |
6761 | MAP ("(got)", BFD_RELOC_ARM_GOT32), | |
6762 | MAP ("(gotoff)", BFD_RELOC_ARM_GOTOFF), | |
6763 | /* ScottB: Jan 30, 1998 */ | |
6764 | /* Added support for parsing "var(PLT)" branch instructions */ | |
6765 | /* generated by GCC for PLT relocs */ | |
6766 | MAP ("(plt)", BFD_RELOC_ARM_PLT32), | |
6767 | NULL, 0, BFD_RELOC_UNUSED | |
6768 | #undef MAP | |
6769 | }; | |
6770 | ||
6771 | for (i = 0, ip = input_line_pointer; | |
6772 | i < sizeof (id) && (isalnum (*ip) || ispunct (*ip)); | |
6773 | i++, ip++) | |
6774 | id[i] = tolower (*ip); | |
6775 | ||
6776 | for (i = 0; reloc_map[i].str; i++) | |
6777 | if (strncmp (id, reloc_map[i].str, reloc_map[i].len) == 0) | |
6778 | break; | |
6779 | ||
6780 | input_line_pointer += reloc_map[i].len; | |
6781 | ||
6782 | return reloc_map[i].reloc; | |
6783 | } | |
6784 | ||
6785 | static void | |
6786 | s_arm_elf_cons (nbytes) | |
6787 | int nbytes; | |
6788 | { | |
6789 | expressionS exp; | |
6790 | ||
6791 | #ifdef md_flush_pending_output | |
6792 | md_flush_pending_output (); | |
6793 | #endif | |
6794 | ||
6795 | if (is_it_end_of_statement ()) | |
6796 | { | |
6797 | demand_empty_rest_of_line (); | |
6798 | return; | |
6799 | } | |
6800 | ||
6801 | #ifdef md_cons_align | |
6802 | md_cons_align (nbytes); | |
6803 | #endif | |
6804 | ||
6805 | do | |
6806 | { | |
6807 | bfd_reloc_code_real_type reloc; | |
6808 | ||
6809 | expression (& exp); | |
6810 | ||
6811 | if (exp.X_op == O_symbol | |
6812 | && * input_line_pointer == '(' | |
6813 | && (reloc = arm_parse_reloc()) != BFD_RELOC_UNUSED) | |
6814 | { | |
6815 | reloc_howto_type * howto = bfd_reloc_type_lookup (stdoutput, reloc); | |
6816 | int size = bfd_get_reloc_size (howto); | |
6817 | ||
6818 | if (size > nbytes) | |
6819 | as_bad ("%s relocations do not fit in %d bytes", howto->name, nbytes); | |
6820 | else | |
6821 | { | |
6822 | register char * p = frag_more ((int) nbytes); | |
6823 | int offset = nbytes - size; | |
6824 | ||
6825 | fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size, | |
6826 | & exp, 0, reloc); | |
6827 | } | |
6828 | } | |
6829 | else | |
6830 | emit_expr (& exp, (unsigned int) nbytes); | |
6831 | } | |
6832 | while (*input_line_pointer++ == ','); | |
6833 | ||
6834 | input_line_pointer--; /* Put terminator back into stream. */ | |
6835 | demand_empty_rest_of_line (); | |
6836 | } | |
6837 | ||
6838 | #endif /* OBJ_ELF */ | |
6839 |