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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 */ | |
49a5575c | 54 | #define ARM_EXT_V5 0x00000080 /* allow CLZ etc */ |
92a66162 | 55 | #define ARM_EXT_V5E 0x00000200 /* "El Segundo" */ |
252b5132 | 56 | |
49a5575c NC |
57 | /* Architectures are the sum of the base and extensions */ |
58 | #define ARM_ARCH_V4 (ARM_7 | ARM_LONGMUL | ARM_HALFWORD) | |
59 | #define ARM_ARCH_V4T (ARM_ARCH_V4 | ARM_THUMB) | |
92a66162 | 60 | #define ARM_ARCH_V5 (ARM_ARCH_V4 | ARM_EXT_V5 ) |
49a5575c | 61 | #define ARM_ARCH_V5T (ARM_ARCH_V5 | ARM_THUMB) |
252b5132 RH |
62 | |
63 | /* Some useful combinations: */ | |
64 | #define ARM_ANY 0x00ffffff | |
49a5575c | 65 | #define ARM_2UP (ARM_ANY - ARM_1) |
252b5132 RH |
66 | #define ARM_ALL ARM_2UP /* Not arm1 only */ |
67 | #define ARM_3UP 0x00fffffc | |
68 | #define ARM_6UP 0x00fffff8 /* Includes ARM7 */ | |
69 | ||
70 | #define FPU_CORE 0x80000000 | |
71 | #define FPU_FPA10 0x40000000 | |
72 | #define FPU_FPA11 0x40000000 | |
73 | #define FPU_NONE 0 | |
74 | ||
75 | /* Some useful combinations */ | |
76 | #define FPU_ALL 0xff000000 /* Note this is ~ARM_ANY */ | |
77 | #define FPU_MEMMULTI 0x7f000000 /* Not fpu_core */ | |
78 | ||
79 | ||
80 | #ifndef CPU_DEFAULT | |
81 | #if defined __thumb__ | |
49a5575c | 82 | #define CPU_DEFAULT (ARM_ARCH_V4 | ARM_THUMB) |
252b5132 RH |
83 | #else |
84 | #define CPU_DEFAULT ARM_ALL | |
85 | #endif | |
86 | #endif | |
87 | ||
88 | #ifndef FPU_DEFAULT | |
89 | #define FPU_DEFAULT FPU_ALL | |
90 | #endif | |
91 | ||
ae5ad4ad NC |
92 | #define streq(a, b) (strcmp (a, b) == 0) |
93 | #define skip_whitespace(str) while (* (str) == ' ') ++ (str) | |
252b5132 RH |
94 | |
95 | static unsigned long cpu_variant = CPU_DEFAULT | FPU_DEFAULT; | |
96 | static int target_oabi = 0; | |
97 | ||
98 | #if defined OBJ_COFF || defined OBJ_ELF | |
99 | /* Flags stored in private area of BFD structure */ | |
100 | static boolean uses_apcs_26 = false; | |
101 | static boolean support_interwork = false; | |
102 | static boolean uses_apcs_float = false; | |
103 | static boolean pic_code = false; | |
104 | #endif | |
105 | ||
106 | /* This array holds the chars that always start a comment. If the | |
107 | pre-processor is disabled, these aren't very useful */ | |
108 | CONST char comment_chars[] = "@"; | |
109 | ||
110 | /* This array holds the chars that only start a comment at the beginning of | |
111 | a line. If the line seems to have the form '# 123 filename' | |
112 | .line and .file directives will appear in the pre-processed output */ | |
113 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
114 | first line of the input file. This is because the compiler outputs | |
115 | #NO_APP at the beginning of its output. */ | |
116 | /* Also note that comments like this one will always work. */ | |
117 | CONST char line_comment_chars[] = "#"; | |
118 | ||
119 | #ifdef TE_LINUX | |
120 | CONST char line_separator_chars[] = ";"; | |
121 | #else | |
122 | CONST char line_separator_chars[] = ""; | |
123 | #endif | |
124 | ||
125 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
126 | CONST char EXP_CHARS[] = "eE"; | |
127 | ||
128 | /* Chars that mean this number is a floating point constant */ | |
129 | /* As in 0f12.456 */ | |
130 | /* or 0d1.2345e12 */ | |
131 | ||
132 | CONST char FLT_CHARS[] = "rRsSfFdDxXeEpP"; | |
133 | ||
134 | /* Prefix characters that indicate the start of an immediate | |
135 | value. */ | |
136 | #define is_immediate_prefix(C) ((C) == '#' || (C) == '$') | |
137 | ||
138 | #ifdef OBJ_ELF | |
139 | symbolS * GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE_" */ | |
140 | #endif | |
141 | ||
a64bcdd8 | 142 | CONST int md_reloc_size = 8; /* Size of relocation record */ |
252b5132 | 143 | |
a64bcdd8 NC |
144 | static int thumb_mode = 0; /* 0: assemble for ARM, 1: assemble for Thumb, |
145 | 2: assemble for Thumb even though target cpu | |
146 | does not support thumb instructions */ | |
252b5132 RH |
147 | typedef struct arm_fix |
148 | { | |
149 | int thumb_mode; | |
150 | } arm_fix_data; | |
151 | ||
152 | struct arm_it | |
153 | { | |
154 | CONST char * error; | |
155 | unsigned long instruction; | |
156 | int suffix; | |
157 | int size; | |
158 | struct | |
159 | { | |
160 | bfd_reloc_code_real_type type; | |
161 | expressionS exp; | |
162 | int pc_rel; | |
163 | } reloc; | |
164 | }; | |
165 | ||
166 | struct arm_it inst; | |
167 | ||
168 | struct asm_shift | |
169 | { | |
170 | CONST char * template; | |
171 | unsigned long value; | |
172 | }; | |
173 | ||
174 | static CONST struct asm_shift shift[] = | |
175 | { | |
176 | {"asl", 0}, | |
177 | {"lsl", 0}, | |
178 | {"lsr", 0x00000020}, | |
179 | {"asr", 0x00000040}, | |
180 | {"ror", 0x00000060}, | |
181 | {"rrx", 0x00000060}, | |
182 | {"ASL", 0}, | |
183 | {"LSL", 0}, | |
184 | {"LSR", 0x00000020}, | |
185 | {"ASR", 0x00000040}, | |
186 | {"ROR", 0x00000060}, | |
187 | {"RRX", 0x00000060} | |
188 | }; | |
189 | ||
190 | #define NO_SHIFT_RESTRICT 1 | |
191 | #define SHIFT_RESTRICT 0 | |
192 | ||
193 | #define NUM_FLOAT_VALS 8 | |
194 | ||
195 | CONST char * fp_const[] = | |
196 | { | |
197 | "0.0", "1.0", "2.0", "3.0", "4.0", "5.0", "0.5", "10.0", 0 | |
198 | }; | |
199 | ||
200 | /* Number of littlenums required to hold an extended precision number */ | |
201 | #define MAX_LITTLENUMS 6 | |
202 | ||
203 | LITTLENUM_TYPE fp_values[NUM_FLOAT_VALS][MAX_LITTLENUMS]; | |
204 | ||
205 | #define FAIL (-1) | |
206 | #define SUCCESS (0) | |
207 | ||
208 | #define SUFF_S 1 | |
209 | #define SUFF_D 2 | |
210 | #define SUFF_E 3 | |
211 | #define SUFF_P 4 | |
212 | ||
213 | #define CP_T_X 0x00008000 | |
214 | #define CP_T_Y 0x00400000 | |
215 | #define CP_T_Pre 0x01000000 | |
216 | #define CP_T_UD 0x00800000 | |
217 | #define CP_T_WB 0x00200000 | |
218 | ||
219 | #define CONDS_BIT (0x00100000) | |
220 | #define LOAD_BIT (0x00100000) | |
221 | #define TRANS_BIT (0x00200000) | |
222 | ||
223 | struct asm_cond | |
224 | { | |
225 | CONST char * template; | |
226 | unsigned long value; | |
227 | }; | |
228 | ||
229 | /* This is to save a hash look-up in the common case */ | |
230 | #define COND_ALWAYS 0xe0000000 | |
231 | ||
232 | static CONST struct asm_cond conds[] = | |
233 | { | |
234 | {"eq", 0x00000000}, | |
235 | {"ne", 0x10000000}, | |
236 | {"cs", 0x20000000}, {"hs", 0x20000000}, | |
237 | {"cc", 0x30000000}, {"ul", 0x30000000}, {"lo", 0x30000000}, | |
238 | {"mi", 0x40000000}, | |
239 | {"pl", 0x50000000}, | |
240 | {"vs", 0x60000000}, | |
241 | {"vc", 0x70000000}, | |
242 | {"hi", 0x80000000}, | |
243 | {"ls", 0x90000000}, | |
244 | {"ge", 0xa0000000}, | |
245 | {"lt", 0xb0000000}, | |
246 | {"gt", 0xc0000000}, | |
247 | {"le", 0xd0000000}, | |
248 | {"al", 0xe0000000}, | |
249 | {"nv", 0xf0000000} | |
250 | }; | |
251 | ||
252 | /* Warning: If the top bit of the set_bits is set, then the standard | |
253 | instruction bitmask is ignored, and the new bitmask is taken from | |
254 | the set_bits: */ | |
255 | struct asm_flg | |
256 | { | |
257 | CONST char * template; /* Basic flag string */ | |
258 | unsigned long set_bits; /* Bits to set */ | |
259 | }; | |
260 | ||
261 | static CONST struct asm_flg s_flag[] = | |
262 | { | |
263 | {"s", CONDS_BIT}, | |
264 | {NULL, 0} | |
265 | }; | |
266 | ||
267 | static CONST struct asm_flg ldr_flags[] = | |
268 | { | |
269 | {"b", 0x00400000}, | |
270 | {"t", TRANS_BIT}, | |
271 | {"bt", 0x00400000 | TRANS_BIT}, | |
272 | {"h", 0x801000b0}, | |
273 | {"sh", 0x801000f0}, | |
274 | {"sb", 0x801000d0}, | |
275 | {NULL, 0} | |
276 | }; | |
277 | ||
278 | static CONST struct asm_flg str_flags[] = | |
279 | { | |
280 | {"b", 0x00400000}, | |
281 | {"t", TRANS_BIT}, | |
282 | {"bt", 0x00400000 | TRANS_BIT}, | |
283 | {"h", 0x800000b0}, | |
284 | {NULL, 0} | |
285 | }; | |
286 | ||
287 | static CONST struct asm_flg byte_flag[] = | |
288 | { | |
289 | {"b", 0x00400000}, | |
290 | {NULL, 0} | |
291 | }; | |
292 | ||
293 | static CONST struct asm_flg cmp_flags[] = | |
294 | { | |
295 | {"s", CONDS_BIT}, | |
296 | {"p", 0x0010f000}, | |
297 | {NULL, 0} | |
298 | }; | |
299 | ||
300 | static CONST struct asm_flg ldm_flags[] = | |
301 | { | |
302 | {"ed", 0x01800000}, | |
303 | {"fd", 0x00800000}, | |
304 | {"ea", 0x01000000}, | |
305 | {"fa", 0x08000000}, | |
306 | {"ib", 0x01800000}, | |
307 | {"ia", 0x00800000}, | |
308 | {"db", 0x01000000}, | |
309 | {"da", 0x08000000}, | |
310 | {NULL, 0} | |
311 | }; | |
312 | ||
313 | static CONST struct asm_flg stm_flags[] = | |
314 | { | |
315 | {"ed", 0x08000000}, | |
316 | {"fd", 0x01000000}, | |
317 | {"ea", 0x00800000}, | |
318 | {"fa", 0x01800000}, | |
319 | {"ib", 0x01800000}, | |
320 | {"ia", 0x00800000}, | |
321 | {"db", 0x01000000}, | |
322 | {"da", 0x08000000}, | |
323 | {NULL, 0} | |
324 | }; | |
325 | ||
326 | static CONST struct asm_flg lfm_flags[] = | |
327 | { | |
328 | {"fd", 0x00800000}, | |
329 | {"ea", 0x01000000}, | |
330 | {NULL, 0} | |
331 | }; | |
332 | ||
333 | static CONST struct asm_flg sfm_flags[] = | |
334 | { | |
335 | {"fd", 0x01000000}, | |
336 | {"ea", 0x00800000}, | |
337 | {NULL, 0} | |
338 | }; | |
339 | ||
340 | static CONST struct asm_flg round_flags[] = | |
341 | { | |
342 | {"p", 0x00000020}, | |
343 | {"m", 0x00000040}, | |
344 | {"z", 0x00000060}, | |
345 | {NULL, 0} | |
346 | }; | |
347 | ||
348 | /* The implementation of the FIX instruction is broken on some assemblers, | |
349 | in that it accepts a precision specifier as well as a rounding specifier, | |
350 | despite the fact that this is meaningless. To be more compatible, we | |
351 | accept it as well, though of course it does not set any bits. */ | |
352 | static CONST struct asm_flg fix_flags[] = | |
353 | { | |
354 | {"p", 0x00000020}, | |
355 | {"m", 0x00000040}, | |
356 | {"z", 0x00000060}, | |
357 | {"sp", 0x00000020}, | |
358 | {"sm", 0x00000040}, | |
359 | {"sz", 0x00000060}, | |
360 | {"dp", 0x00000020}, | |
361 | {"dm", 0x00000040}, | |
362 | {"dz", 0x00000060}, | |
363 | {"ep", 0x00000020}, | |
364 | {"em", 0x00000040}, | |
365 | {"ez", 0x00000060}, | |
366 | {NULL, 0} | |
367 | }; | |
368 | ||
369 | static CONST struct asm_flg except_flag[] = | |
370 | { | |
371 | {"e", 0x00400000}, | |
372 | {NULL, 0} | |
373 | }; | |
374 | ||
375 | static CONST struct asm_flg cplong_flag[] = | |
376 | { | |
377 | {"l", 0x00400000}, | |
378 | {NULL, 0} | |
379 | }; | |
380 | ||
381 | struct asm_psr | |
382 | { | |
383 | CONST char * template; | |
384 | unsigned long number; | |
385 | }; | |
386 | ||
387 | #define PSR_FIELD_MASK 0x000f0000 | |
388 | ||
389 | #define PSR_FLAGS 0x00080000 | |
390 | #define PSR_CONTROL 0x00010000 /* Undocumented instruction, its use is discouraged by ARM */ | |
391 | #define PSR_ALL 0x00090000 | |
392 | ||
393 | #define CPSR_ALL 0 | |
394 | #define SPSR_ALL 1 | |
395 | #define CPSR_FLG 2 | |
396 | #define SPSR_FLG 3 | |
397 | #define CPSR_CTL 4 | |
398 | #define SPSR_CTL 5 | |
399 | ||
400 | static CONST struct asm_psr psrs[] = | |
401 | { | |
402 | /* Valid <psr>'s */ | |
403 | {"cpsr", CPSR_ALL}, | |
404 | {"cpsr_all", CPSR_ALL}, | |
405 | {"spsr", SPSR_ALL}, | |
406 | {"spsr_all", SPSR_ALL}, | |
407 | ||
408 | /* Valid <psrf>'s */ | |
409 | {"cpsr_flg", CPSR_FLG}, | |
410 | {"spsr_flg", SPSR_FLG}, | |
411 | ||
412 | /* Valid <psrc>'s */ | |
413 | {"cpsr_c", CPSR_CTL}, | |
414 | {"cpsr_ctl", CPSR_CTL}, | |
415 | {"spsr_c", SPSR_CTL}, | |
416 | {"spsr_ctl", SPSR_CTL} | |
417 | }; | |
418 | ||
419 | /* Functions called by parser */ | |
420 | /* ARM instructions */ | |
ae5ad4ad NC |
421 | static void do_arit PARAMS ((char *, unsigned long)); |
422 | static void do_cmp PARAMS ((char *, unsigned long)); | |
423 | static void do_mov PARAMS ((char *, unsigned long)); | |
424 | static void do_ldst PARAMS ((char *, unsigned long)); | |
425 | static void do_ldmstm PARAMS ((char *, unsigned long)); | |
426 | static void do_branch PARAMS ((char *, unsigned long)); | |
427 | static void do_swi PARAMS ((char *, unsigned long)); | |
428 | /* Pseudo Op codes */ | |
429 | static void do_adr PARAMS ((char *, unsigned long)); | |
430 | static void do_adrl PARAMS ((char *, unsigned long)); | |
431 | static void do_nop PARAMS ((char *, unsigned long)); | |
432 | /* ARM 2 */ | |
433 | static void do_mul PARAMS ((char *, unsigned long)); | |
434 | static void do_mla PARAMS ((char *, unsigned long)); | |
435 | /* ARM 3 */ | |
436 | static void do_swap PARAMS ((char *, unsigned long)); | |
437 | /* ARM 6 */ | |
438 | static void do_msr PARAMS ((char *, unsigned long)); | |
439 | static void do_mrs PARAMS ((char *, unsigned long)); | |
440 | /* ARM 7M */ | |
441 | static void do_mull PARAMS ((char *, unsigned long)); | |
442 | /* ARM THUMB */ | |
443 | static void do_bx PARAMS ((char *, unsigned long)); | |
92a66162 | 444 | |
ae5ad4ad NC |
445 | |
446 | /* Coprocessor Instructions */ | |
447 | static void do_cdp PARAMS ((char *, unsigned long)); | |
448 | static void do_lstc PARAMS ((char *, unsigned long)); | |
449 | static void do_co_reg PARAMS ((char *, unsigned long)); | |
450 | static void do_fp_ctrl PARAMS ((char *, unsigned long)); | |
451 | static void do_fp_ldst PARAMS ((char *, unsigned long)); | |
452 | static void do_fp_ldmstm PARAMS ((char *, unsigned long)); | |
453 | static void do_fp_dyadic PARAMS ((char *, unsigned long)); | |
454 | static void do_fp_monadic PARAMS ((char *, unsigned long)); | |
455 | static void do_fp_cmp PARAMS ((char *, unsigned long)); | |
456 | static void do_fp_from_reg PARAMS ((char *, unsigned long)); | |
457 | static void do_fp_to_reg PARAMS ((char *, unsigned long)); | |
458 | ||
459 | static void fix_new_arm PARAMS ((fragS *, int, short, expressionS *, int, int)); | |
460 | static int arm_reg_parse PARAMS ((char **)); | |
461 | static int arm_psr_parse PARAMS ((char **)); | |
462 | static void symbol_locate PARAMS ((symbolS *, CONST char *, segT, valueT, fragS *)); | |
252b5132 | 463 | static int add_to_lit_pool PARAMS ((void)); |
ae5ad4ad NC |
464 | static unsigned validate_immediate PARAMS ((unsigned)); |
465 | static unsigned validate_immediate_twopart PARAMS ((unsigned int, unsigned int *)); | |
276b1dc2 | 466 | static int validate_offset_imm PARAMS ((unsigned int, int)); |
252b5132 RH |
467 | static void opcode_select PARAMS ((int)); |
468 | static void end_of_line PARAMS ((char *)); | |
469 | static int reg_required_here PARAMS ((char **, int)); | |
470 | static int psr_required_here PARAMS ((char **, int, int)); | |
471 | static int co_proc_number PARAMS ((char **)); | |
472 | static int cp_opc_expr PARAMS ((char **, int, int)); | |
473 | static int cp_reg_required_here PARAMS ((char **, int)); | |
474 | static int fp_reg_required_here PARAMS ((char **, int)); | |
475 | static int cp_address_offset PARAMS ((char **)); | |
476 | static int cp_address_required_here PARAMS ((char **)); | |
477 | static int my_get_float_expression PARAMS ((char **)); | |
478 | static int skip_past_comma PARAMS ((char **)); | |
479 | static int walk_no_bignums PARAMS ((symbolS *)); | |
ae5ad4ad | 480 | static int negate_data_op PARAMS ((unsigned long *, unsigned long)); |
252b5132 RH |
481 | static int data_op2 PARAMS ((char **)); |
482 | static int fp_op2 PARAMS ((char **)); | |
483 | static long reg_list PARAMS ((char **)); | |
484 | static void thumb_load_store PARAMS ((char *, int, int)); | |
485 | static int decode_shift PARAMS ((char **, int)); | |
486 | static int ldst_extend PARAMS ((char **, int)); | |
487 | static void thumb_add_sub PARAMS ((char *, int)); | |
488 | static void insert_reg PARAMS ((int)); | |
489 | static void thumb_shift PARAMS ((char *, int)); | |
490 | static void thumb_mov_compare PARAMS ((char *, int)); | |
491 | static void set_constant_flonums PARAMS ((void)); | |
492 | static valueT md_chars_to_number PARAMS ((char *, int)); | |
493 | static void insert_reg_alias PARAMS ((char *, int)); | |
49a5575c | 494 | static void output_inst PARAMS ((void)); |
252b5132 | 495 | #ifdef OBJ_ELF |
661e4995 | 496 | static bfd_reloc_code_real_type arm_parse_reloc PARAMS ((void)); |
252b5132 RH |
497 | #endif |
498 | ||
499 | /* ARM instructions take 4bytes in the object file, Thumb instructions | |
500 | take 2: */ | |
501 | #define INSN_SIZE 4 | |
502 | ||
503 | /* LONGEST_INST is the longest basic instruction name without conditions or | |
504 | * flags. | |
505 | * ARM7M has 4 of length 5 | |
506 | */ | |
507 | ||
508 | #define LONGEST_INST 5 | |
509 | ||
92a66162 | 510 | |
252b5132 RH |
511 | struct asm_opcode |
512 | { | |
513 | CONST char * template; /* Basic string to match */ | |
514 | unsigned long value; /* Basic instruction code */ | |
92a66162 DL |
515 | |
516 | /* Compulsory suffix that must follow conds. If "", then the | |
517 | instruction is not conditional and must have no suffix. */ | |
518 | CONST char * comp_suffix; | |
519 | ||
252b5132 RH |
520 | CONST struct asm_flg * flags; /* Bits to toggle if flag 'n' set */ |
521 | unsigned long variants; /* Which CPU variants this exists for */ | |
522 | /* Function to call to parse args */ | |
523 | void (* parms) PARAMS ((char *, unsigned long)); | |
524 | }; | |
525 | ||
526 | static CONST struct asm_opcode insns[] = | |
527 | { | |
528 | /* ARM Instructions */ | |
529 | {"and", 0x00000000, NULL, s_flag, ARM_ANY, do_arit}, | |
530 | {"eor", 0x00200000, NULL, s_flag, ARM_ANY, do_arit}, | |
531 | {"sub", 0x00400000, NULL, s_flag, ARM_ANY, do_arit}, | |
532 | {"rsb", 0x00600000, NULL, s_flag, ARM_ANY, do_arit}, | |
533 | {"add", 0x00800000, NULL, s_flag, ARM_ANY, do_arit}, | |
534 | {"adc", 0x00a00000, NULL, s_flag, ARM_ANY, do_arit}, | |
535 | {"sbc", 0x00c00000, NULL, s_flag, ARM_ANY, do_arit}, | |
536 | {"rsc", 0x00e00000, NULL, s_flag, ARM_ANY, do_arit}, | |
537 | {"orr", 0x01800000, NULL, s_flag, ARM_ANY, do_arit}, | |
538 | {"bic", 0x01c00000, NULL, s_flag, ARM_ANY, do_arit}, | |
539 | {"tst", 0x01000000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
540 | {"teq", 0x01200000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
541 | {"cmp", 0x01400000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
542 | {"cmn", 0x01600000, NULL, cmp_flags, ARM_ANY, do_cmp}, | |
543 | {"mov", 0x01a00000, NULL, s_flag, ARM_ANY, do_mov}, | |
544 | {"mvn", 0x01e00000, NULL, s_flag, ARM_ANY, do_mov}, | |
545 | {"str", 0x04000000, NULL, str_flags, ARM_ANY, do_ldst}, | |
546 | {"ldr", 0x04100000, NULL, ldr_flags, ARM_ANY, do_ldst}, | |
547 | {"stm", 0x08000000, NULL, stm_flags, ARM_ANY, do_ldmstm}, | |
548 | {"ldm", 0x08100000, NULL, ldm_flags, ARM_ANY, do_ldmstm}, | |
549 | {"swi", 0x0f000000, NULL, NULL, ARM_ANY, do_swi}, | |
550 | {"bl", 0x0bfffffe, NULL, NULL, ARM_ANY, do_branch}, | |
551 | {"b", 0x0afffffe, NULL, NULL, ARM_ANY, do_branch}, | |
552 | ||
553 | /* Pseudo ops */ | |
554 | {"adr", 0x028f0000, NULL, NULL, ARM_ANY, do_adr}, | |
49a5575c | 555 | {"adrl", 0x028f0000, NULL, NULL, ARM_ANY, do_adrl}, |
252b5132 RH |
556 | {"nop", 0x01a00000, NULL, NULL, ARM_ANY, do_nop}, |
557 | ||
558 | /* ARM 2 multiplies */ | |
559 | {"mul", 0x00000090, NULL, s_flag, ARM_2UP, do_mul}, | |
560 | {"mla", 0x00200090, NULL, s_flag, ARM_2UP, do_mla}, | |
561 | ||
562 | /* ARM 3 - swp instructions */ | |
563 | {"swp", 0x01000090, NULL, byte_flag, ARM_3UP, do_swap}, | |
564 | ||
565 | /* ARM 6 Coprocessor instructions */ | |
566 | {"mrs", 0x010f0000, NULL, NULL, ARM_6UP, do_mrs}, | |
567 | {"msr", 0x0120f000, NULL, NULL, ARM_6UP, do_msr}, | |
568 | /* ScottB: our code uses 0x0128f000 for msr. | |
569 | NickC: but this is wrong because the bits 16 and 19 are handled | |
570 | by the PSR_xxx defines above. */ | |
571 | ||
572 | /* ARM 7M long multiplies - need signed/unsigned flags! */ | |
573 | {"smull", 0x00c00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
574 | {"umull", 0x00800090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
575 | {"smlal", 0x00e00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
576 | {"umlal", 0x00a00090, NULL, s_flag, ARM_LONGMUL, do_mull}, | |
577 | ||
578 | /* ARM THUMB interworking */ | |
579 | {"bx", 0x012fff10, NULL, NULL, ARM_THUMB, do_bx}, | |
580 | ||
581 | /* Floating point instructions */ | |
582 | {"wfs", 0x0e200110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
583 | {"rfs", 0x0e300110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
584 | {"wfc", 0x0e400110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
585 | {"rfc", 0x0e500110, NULL, NULL, FPU_ALL, do_fp_ctrl}, | |
586 | {"ldf", 0x0c100100, "sdep", NULL, FPU_ALL, do_fp_ldst}, | |
587 | {"stf", 0x0c000100, "sdep", NULL, FPU_ALL, do_fp_ldst}, | |
588 | {"lfm", 0x0c100200, NULL, lfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, | |
589 | {"sfm", 0x0c000200, NULL, sfm_flags, FPU_MEMMULTI, do_fp_ldmstm}, | |
590 | {"mvf", 0x0e008100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
591 | {"mnf", 0x0e108100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
592 | {"abs", 0x0e208100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
593 | {"rnd", 0x0e308100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
594 | {"sqt", 0x0e408100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
595 | {"log", 0x0e508100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
596 | {"lgn", 0x0e608100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
597 | {"exp", 0x0e708100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
598 | {"sin", 0x0e808100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
599 | {"cos", 0x0e908100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
600 | {"tan", 0x0ea08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
601 | {"asn", 0x0eb08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
602 | {"acs", 0x0ec08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
603 | {"atn", 0x0ed08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
604 | {"urd", 0x0ee08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
605 | {"nrm", 0x0ef08100, "sde", round_flags, FPU_ALL, do_fp_monadic}, | |
606 | {"adf", 0x0e000100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
607 | {"suf", 0x0e200100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
608 | {"rsf", 0x0e300100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
609 | {"muf", 0x0e100100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
610 | {"dvf", 0x0e400100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
611 | {"rdf", 0x0e500100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
612 | {"pow", 0x0e600100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
613 | {"rpw", 0x0e700100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
614 | {"rmf", 0x0e800100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
615 | {"fml", 0x0e900100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
616 | {"fdv", 0x0ea00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
617 | {"frd", 0x0eb00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
618 | {"pol", 0x0ec00100, "sde", round_flags, FPU_ALL, do_fp_dyadic}, | |
619 | {"cmf", 0x0e90f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, | |
620 | {"cnf", 0x0eb0f110, NULL, except_flag, FPU_ALL, do_fp_cmp}, | |
621 | /* The FPA10 data sheet suggests that the 'E' of cmfe/cnfe should not | |
622 | be an optional suffix, but part of the instruction. To be compatible, | |
623 | we accept either. */ | |
624 | {"cmfe", 0x0ed0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, | |
625 | {"cnfe", 0x0ef0f110, NULL, NULL, FPU_ALL, do_fp_cmp}, | |
626 | {"flt", 0x0e000110, "sde", round_flags, FPU_ALL, do_fp_from_reg}, | |
627 | {"fix", 0x0e100110, NULL, fix_flags, FPU_ALL, do_fp_to_reg}, | |
628 | ||
629 | /* Generic copressor instructions */ | |
630 | {"cdp", 0x0e000000, NULL, NULL, ARM_2UP, do_cdp}, | |
631 | {"ldc", 0x0c100000, NULL, cplong_flag, ARM_2UP, do_lstc}, | |
632 | {"stc", 0x0c000000, NULL, cplong_flag, ARM_2UP, do_lstc}, | |
633 | {"mcr", 0x0e000010, NULL, NULL, ARM_2UP, do_co_reg}, | |
634 | {"mrc", 0x0e100010, NULL, NULL, ARM_2UP, do_co_reg}, | |
635 | }; | |
636 | ||
637 | /* defines for various bits that we will want to toggle */ | |
638 | ||
639 | #define INST_IMMEDIATE 0x02000000 | |
640 | #define OFFSET_REG 0x02000000 | |
641 | #define HWOFFSET_IMM 0x00400000 | |
642 | #define SHIFT_BY_REG 0x00000010 | |
643 | #define PRE_INDEX 0x01000000 | |
644 | #define INDEX_UP 0x00800000 | |
645 | #define WRITE_BACK 0x00200000 | |
913f265c | 646 | #define LDM_TYPE_2_OR_3 0x00400000 |
252b5132 RH |
647 | |
648 | #define LITERAL_MASK 0xf000f000 | |
649 | #define COND_MASK 0xf0000000 | |
650 | #define OPCODE_MASK 0xfe1fffff | |
651 | #define DATA_OP_SHIFT 21 | |
652 | ||
653 | /* Codes to distinguish the arithmetic instructions */ | |
654 | ||
655 | #define OPCODE_AND 0 | |
656 | #define OPCODE_EOR 1 | |
657 | #define OPCODE_SUB 2 | |
658 | #define OPCODE_RSB 3 | |
659 | #define OPCODE_ADD 4 | |
660 | #define OPCODE_ADC 5 | |
661 | #define OPCODE_SBC 6 | |
662 | #define OPCODE_RSC 7 | |
663 | #define OPCODE_TST 8 | |
664 | #define OPCODE_TEQ 9 | |
665 | #define OPCODE_CMP 10 | |
666 | #define OPCODE_CMN 11 | |
667 | #define OPCODE_ORR 12 | |
668 | #define OPCODE_MOV 13 | |
669 | #define OPCODE_BIC 14 | |
670 | #define OPCODE_MVN 15 | |
671 | ||
ae5ad4ad NC |
672 | static void do_t_nop PARAMS ((char *)); |
673 | static void do_t_arit PARAMS ((char *)); | |
674 | static void do_t_add PARAMS ((char *)); | |
675 | static void do_t_asr PARAMS ((char *)); | |
676 | static void do_t_branch9 PARAMS ((char *)); | |
677 | static void do_t_branch12 PARAMS ((char *)); | |
678 | static void do_t_branch23 PARAMS ((char *)); | |
679 | static void do_t_bx PARAMS ((char *)); | |
680 | static void do_t_compare PARAMS ((char *)); | |
681 | static void do_t_ldmstm PARAMS ((char *)); | |
682 | static void do_t_ldr PARAMS ((char *)); | |
683 | static void do_t_ldrb PARAMS ((char *)); | |
684 | static void do_t_ldrh PARAMS ((char *)); | |
685 | static void do_t_lds PARAMS ((char *)); | |
686 | static void do_t_lsl PARAMS ((char *)); | |
687 | static void do_t_lsr PARAMS ((char *)); | |
688 | static void do_t_mov PARAMS ((char *)); | |
689 | static void do_t_push_pop PARAMS ((char *)); | |
690 | static void do_t_str PARAMS ((char *)); | |
691 | static void do_t_strb PARAMS ((char *)); | |
692 | static void do_t_strh PARAMS ((char *)); | |
693 | static void do_t_sub PARAMS ((char *)); | |
694 | static void do_t_swi PARAMS ((char *)); | |
695 | static void do_t_adr PARAMS ((char *)); | |
252b5132 RH |
696 | |
697 | #define T_OPCODE_MUL 0x4340 | |
698 | #define T_OPCODE_TST 0x4200 | |
699 | #define T_OPCODE_CMN 0x42c0 | |
700 | #define T_OPCODE_NEG 0x4240 | |
701 | #define T_OPCODE_MVN 0x43c0 | |
702 | ||
703 | #define T_OPCODE_ADD_R3 0x1800 | |
704 | #define T_OPCODE_SUB_R3 0x1a00 | |
705 | #define T_OPCODE_ADD_HI 0x4400 | |
706 | #define T_OPCODE_ADD_ST 0xb000 | |
707 | #define T_OPCODE_SUB_ST 0xb080 | |
708 | #define T_OPCODE_ADD_SP 0xa800 | |
709 | #define T_OPCODE_ADD_PC 0xa000 | |
710 | #define T_OPCODE_ADD_I8 0x3000 | |
711 | #define T_OPCODE_SUB_I8 0x3800 | |
712 | #define T_OPCODE_ADD_I3 0x1c00 | |
713 | #define T_OPCODE_SUB_I3 0x1e00 | |
714 | ||
715 | #define T_OPCODE_ASR_R 0x4100 | |
716 | #define T_OPCODE_LSL_R 0x4080 | |
717 | #define T_OPCODE_LSR_R 0x40c0 | |
718 | #define T_OPCODE_ASR_I 0x1000 | |
719 | #define T_OPCODE_LSL_I 0x0000 | |
720 | #define T_OPCODE_LSR_I 0x0800 | |
721 | ||
722 | #define T_OPCODE_MOV_I8 0x2000 | |
723 | #define T_OPCODE_CMP_I8 0x2800 | |
724 | #define T_OPCODE_CMP_LR 0x4280 | |
725 | #define T_OPCODE_MOV_HR 0x4600 | |
726 | #define T_OPCODE_CMP_HR 0x4500 | |
727 | ||
728 | #define T_OPCODE_LDR_PC 0x4800 | |
729 | #define T_OPCODE_LDR_SP 0x9800 | |
730 | #define T_OPCODE_STR_SP 0x9000 | |
731 | #define T_OPCODE_LDR_IW 0x6800 | |
732 | #define T_OPCODE_STR_IW 0x6000 | |
733 | #define T_OPCODE_LDR_IH 0x8800 | |
734 | #define T_OPCODE_STR_IH 0x8000 | |
735 | #define T_OPCODE_LDR_IB 0x7800 | |
736 | #define T_OPCODE_STR_IB 0x7000 | |
737 | #define T_OPCODE_LDR_RW 0x5800 | |
738 | #define T_OPCODE_STR_RW 0x5000 | |
739 | #define T_OPCODE_LDR_RH 0x5a00 | |
740 | #define T_OPCODE_STR_RH 0x5200 | |
741 | #define T_OPCODE_LDR_RB 0x5c00 | |
742 | #define T_OPCODE_STR_RB 0x5400 | |
743 | ||
744 | #define T_OPCODE_PUSH 0xb400 | |
745 | #define T_OPCODE_POP 0xbc00 | |
746 | ||
747 | #define T_OPCODE_BRANCH 0xe7fe | |
748 | ||
749 | static int thumb_reg PARAMS ((char ** str, int hi_lo)); | |
750 | ||
751 | #define THUMB_SIZE 2 /* Size of thumb instruction */ | |
752 | #define THUMB_REG_LO 0x1 | |
753 | #define THUMB_REG_HI 0x2 | |
754 | #define THUMB_REG_ANY 0x3 | |
755 | ||
756 | #define THUMB_H1 0x0080 | |
757 | #define THUMB_H2 0x0040 | |
758 | ||
759 | #define THUMB_ASR 0 | |
760 | #define THUMB_LSL 1 | |
761 | #define THUMB_LSR 2 | |
762 | ||
763 | #define THUMB_MOVE 0 | |
764 | #define THUMB_COMPARE 1 | |
765 | ||
766 | #define THUMB_LOAD 0 | |
767 | #define THUMB_STORE 1 | |
768 | ||
769 | #define THUMB_PP_PC_LR 0x0100 | |
770 | ||
771 | /* These three are used for immediate shifts, do not alter */ | |
772 | #define THUMB_WORD 2 | |
773 | #define THUMB_HALFWORD 1 | |
774 | #define THUMB_BYTE 0 | |
775 | ||
776 | struct thumb_opcode | |
777 | { | |
778 | CONST char * template; /* Basic string to match */ | |
779 | unsigned long value; /* Basic instruction code */ | |
780 | int size; | |
b49cfa5d | 781 | unsigned long variants; /* Which CPU variants this exists for */ |
252b5132 RH |
782 | void (* parms) PARAMS ((char *)); /* Function to call to parse args */ |
783 | }; | |
784 | ||
785 | static CONST struct thumb_opcode tinsns[] = | |
786 | { | |
b49cfa5d JL |
787 | {"adc", 0x4140, 2, ARM_THUMB, do_t_arit}, |
788 | {"add", 0x0000, 2, ARM_THUMB, do_t_add}, | |
789 | {"and", 0x4000, 2, ARM_THUMB, do_t_arit}, | |
790 | {"asr", 0x0000, 2, ARM_THUMB, do_t_asr}, | |
791 | {"b", T_OPCODE_BRANCH, 2, ARM_THUMB, do_t_branch12}, | |
792 | {"beq", 0xd0fe, 2, ARM_THUMB, do_t_branch9}, | |
793 | {"bne", 0xd1fe, 2, ARM_THUMB, do_t_branch9}, | |
794 | {"bcs", 0xd2fe, 2, ARM_THUMB, do_t_branch9}, | |
795 | {"bhs", 0xd2fe, 2, ARM_THUMB, do_t_branch9}, | |
796 | {"bcc", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, | |
797 | {"bul", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, | |
798 | {"blo", 0xd3fe, 2, ARM_THUMB, do_t_branch9}, | |
799 | {"bmi", 0xd4fe, 2, ARM_THUMB, do_t_branch9}, | |
800 | {"bpl", 0xd5fe, 2, ARM_THUMB, do_t_branch9}, | |
801 | {"bvs", 0xd6fe, 2, ARM_THUMB, do_t_branch9}, | |
802 | {"bvc", 0xd7fe, 2, ARM_THUMB, do_t_branch9}, | |
803 | {"bhi", 0xd8fe, 2, ARM_THUMB, do_t_branch9}, | |
804 | {"bls", 0xd9fe, 2, ARM_THUMB, do_t_branch9}, | |
805 | {"bge", 0xdafe, 2, ARM_THUMB, do_t_branch9}, | |
806 | {"blt", 0xdbfe, 2, ARM_THUMB, do_t_branch9}, | |
807 | {"bgt", 0xdcfe, 2, ARM_THUMB, do_t_branch9}, | |
808 | {"ble", 0xddfe, 2, ARM_THUMB, do_t_branch9}, | |
809 | {"bic", 0x4380, 2, ARM_THUMB, do_t_arit}, | |
810 | {"bl", 0xf7fffffe, 4, ARM_THUMB, do_t_branch23}, | |
811 | {"bx", 0x4700, 2, ARM_THUMB, do_t_bx}, | |
812 | {"cmn", T_OPCODE_CMN, 2, ARM_THUMB, do_t_arit}, | |
813 | {"cmp", 0x0000, 2, ARM_THUMB, do_t_compare}, | |
814 | {"eor", 0x4040, 2, ARM_THUMB, do_t_arit}, | |
815 | {"ldmia", 0xc800, 2, ARM_THUMB, do_t_ldmstm}, | |
816 | {"ldr", 0x0000, 2, ARM_THUMB, do_t_ldr}, | |
817 | {"ldrb", 0x0000, 2, ARM_THUMB, do_t_ldrb}, | |
818 | {"ldrh", 0x0000, 2, ARM_THUMB, do_t_ldrh}, | |
819 | {"ldrsb", 0x5600, 2, ARM_THUMB, do_t_lds}, | |
820 | {"ldrsh", 0x5e00, 2, ARM_THUMB, do_t_lds}, | |
821 | {"ldsb", 0x5600, 2, ARM_THUMB, do_t_lds}, | |
822 | {"ldsh", 0x5e00, 2, ARM_THUMB, do_t_lds}, | |
823 | {"lsl", 0x0000, 2, ARM_THUMB, do_t_lsl}, | |
824 | {"lsr", 0x0000, 2, ARM_THUMB, do_t_lsr}, | |
825 | {"mov", 0x0000, 2, ARM_THUMB, do_t_mov}, | |
826 | {"mul", T_OPCODE_MUL, 2, ARM_THUMB, do_t_arit}, | |
827 | {"mvn", T_OPCODE_MVN, 2, ARM_THUMB, do_t_arit}, | |
828 | {"neg", T_OPCODE_NEG, 2, ARM_THUMB, do_t_arit}, | |
829 | {"orr", 0x4300, 2, ARM_THUMB, do_t_arit}, | |
830 | {"pop", 0xbc00, 2, ARM_THUMB, do_t_push_pop}, | |
831 | {"push", 0xb400, 2, ARM_THUMB, do_t_push_pop}, | |
832 | {"ror", 0x41c0, 2, ARM_THUMB, do_t_arit}, | |
833 | {"sbc", 0x4180, 2, ARM_THUMB, do_t_arit}, | |
834 | {"stmia", 0xc000, 2, ARM_THUMB, do_t_ldmstm}, | |
835 | {"str", 0x0000, 2, ARM_THUMB, do_t_str}, | |
836 | {"strb", 0x0000, 2, ARM_THUMB, do_t_strb}, | |
837 | {"strh", 0x0000, 2, ARM_THUMB, do_t_strh}, | |
838 | {"swi", 0xdf00, 2, ARM_THUMB, do_t_swi}, | |
839 | {"sub", 0x0000, 2, ARM_THUMB, do_t_sub}, | |
840 | {"tst", T_OPCODE_TST, 2, ARM_THUMB, do_t_arit}, | |
252b5132 | 841 | /* Pseudo ops: */ |
b49cfa5d JL |
842 | {"adr", 0x0000, 2, ARM_THUMB, do_t_adr}, |
843 | {"nop", 0x46C0, 2, ARM_THUMB, do_t_nop}, /* mov r8,r8 */ | |
252b5132 RH |
844 | }; |
845 | ||
846 | struct reg_entry | |
847 | { | |
848 | CONST char * name; | |
849 | int number; | |
850 | }; | |
851 | ||
852 | #define int_register(reg) ((reg) >= 0 && (reg) <= 15) | |
853 | #define cp_register(reg) ((reg) >= 32 && (reg) <= 47) | |
854 | #define fp_register(reg) ((reg) >= 16 && (reg) <= 23) | |
855 | ||
856 | #define REG_PC 15 | |
857 | #define REG_LR 14 | |
858 | #define REG_SP 13 | |
859 | ||
860 | /* These are the standard names; Users can add aliases with .req */ | |
861 | static CONST struct reg_entry reg_table[] = | |
862 | { | |
863 | /* Processor Register Numbers */ | |
864 | {"r0", 0}, {"r1", 1}, {"r2", 2}, {"r3", 3}, | |
865 | {"r4", 4}, {"r5", 5}, {"r6", 6}, {"r7", 7}, | |
866 | {"r8", 8}, {"r9", 9}, {"r10", 10}, {"r11", 11}, | |
867 | {"r12", 12}, {"r13", REG_SP},{"r14", REG_LR},{"r15", REG_PC}, | |
868 | /* APCS conventions */ | |
869 | {"a1", 0}, {"a2", 1}, {"a3", 2}, {"a4", 3}, | |
870 | {"v1", 4}, {"v2", 5}, {"v3", 6}, {"v4", 7}, {"v5", 8}, | |
871 | {"v6", 9}, {"sb", 9}, {"v7", 10}, {"sl", 10}, | |
872 | {"fp", 11}, {"ip", 12}, {"sp", REG_SP},{"lr", REG_LR},{"pc", REG_PC}, | |
873 | /* FP Registers */ | |
874 | {"f0", 16}, {"f1", 17}, {"f2", 18}, {"f3", 19}, | |
875 | {"f4", 20}, {"f5", 21}, {"f6", 22}, {"f7", 23}, | |
876 | {"c0", 32}, {"c1", 33}, {"c2", 34}, {"c3", 35}, | |
877 | {"c4", 36}, {"c5", 37}, {"c6", 38}, {"c7", 39}, | |
878 | {"c8", 40}, {"c9", 41}, {"c10", 42}, {"c11", 43}, | |
879 | {"c12", 44}, {"c13", 45}, {"c14", 46}, {"c15", 47}, | |
880 | {"cr0", 32}, {"cr1", 33}, {"cr2", 34}, {"cr3", 35}, | |
881 | {"cr4", 36}, {"cr5", 37}, {"cr6", 38}, {"cr7", 39}, | |
882 | {"cr8", 40}, {"cr9", 41}, {"cr10", 42}, {"cr11", 43}, | |
883 | {"cr12", 44}, {"cr13", 45}, {"cr14", 46}, {"cr15", 47}, | |
884 | {NULL, 0} | |
885 | }; | |
886 | ||
92a66162 DL |
887 | #define BAD_ARGS _("Bad arguments to instruction") |
888 | #define BAD_PC _("r15 not allowed here") | |
889 | #define BAD_FLAGS _("Instruction should not have flags") | |
890 | #define BAD_COND _("Instruction is not conditional") | |
252b5132 RH |
891 | |
892 | static struct hash_control * arm_ops_hsh = NULL; | |
893 | static struct hash_control * arm_tops_hsh = NULL; | |
894 | static struct hash_control * arm_cond_hsh = NULL; | |
895 | static struct hash_control * arm_shift_hsh = NULL; | |
896 | static struct hash_control * arm_reg_hsh = NULL; | |
897 | static struct hash_control * arm_psr_hsh = NULL; | |
898 | ||
899 | /* This table describes all the machine specific pseudo-ops the assembler | |
900 | has to support. The fields are: | |
901 | pseudo-op name without dot | |
902 | function to call to execute this pseudo-op | |
903 | Integer arg to pass to the function | |
904 | */ | |
905 | ||
906 | static void s_req PARAMS ((int)); | |
907 | static void s_align PARAMS ((int)); | |
908 | static void s_bss PARAMS ((int)); | |
909 | static void s_even PARAMS ((int)); | |
910 | static void s_ltorg PARAMS ((int)); | |
911 | static void s_arm PARAMS ((int)); | |
912 | static void s_thumb PARAMS ((int)); | |
913 | static void s_code PARAMS ((int)); | |
914 | static void s_force_thumb PARAMS ((int)); | |
915 | static void s_thumb_func PARAMS ((int)); | |
fed881b1 NC |
916 | static void s_thumb_set PARAMS ((int)); |
917 | static void arm_s_text PARAMS ((int)); | |
918 | static void arm_s_data PARAMS ((int)); | |
252b5132 | 919 | #ifdef OBJ_ELF |
fed881b1 | 920 | static void arm_s_section PARAMS ((int)); |
252b5132 RH |
921 | static void s_arm_elf_cons PARAMS ((int)); |
922 | #endif | |
923 | ||
924 | static int my_get_expression PARAMS ((expressionS *, char **)); | |
925 | ||
926 | CONST pseudo_typeS md_pseudo_table[] = | |
927 | { | |
fed881b1 NC |
928 | { "req", s_req, 0 }, /* Never called becasue '.req' does not start line */ |
929 | { "bss", s_bss, 0 }, | |
930 | { "align", s_align, 0 }, | |
931 | { "arm", s_arm, 0 }, | |
932 | { "thumb", s_thumb, 0 }, | |
933 | { "code", s_code, 0 }, | |
934 | { "force_thumb", s_force_thumb, 0 }, | |
935 | { "thumb_func", s_thumb_func, 0 }, | |
936 | { "thumb_set", s_thumb_set, 0 }, | |
937 | { "even", s_even, 0 }, | |
938 | { "ltorg", s_ltorg, 0 }, | |
939 | { "pool", s_ltorg, 0 }, | |
940 | /* Allow for the effect of section changes. */ | |
941 | { "text", arm_s_text, 0 }, | |
942 | { "data", arm_s_data, 0 }, | |
252b5132 | 943 | #ifdef OBJ_ELF |
fed881b1 NC |
944 | { "section", arm_s_section, 0 }, |
945 | { "section.s", arm_s_section, 0 }, | |
946 | { "sect", arm_s_section, 0 }, | |
947 | { "sect.s", arm_s_section, 0 }, | |
948 | { "word", s_arm_elf_cons, 4 }, | |
949 | { "long", s_arm_elf_cons, 4 }, | |
252b5132 | 950 | #else |
fed881b1 | 951 | { "word", cons, 4}, |
252b5132 | 952 | #endif |
fed881b1 NC |
953 | { "extend", float_cons, 'x' }, |
954 | { "ldouble", float_cons, 'x' }, | |
955 | { "packed", float_cons, 'p' }, | |
956 | { 0, 0, 0 } | |
252b5132 RH |
957 | }; |
958 | ||
959 | /* Stuff needed to resolve the label ambiguity | |
960 | As: | |
961 | ... | |
962 | label: <insn> | |
963 | may differ from: | |
964 | ... | |
965 | label: | |
966 | <insn> | |
967 | */ | |
968 | ||
969 | symbolS * last_label_seen; | |
970 | static int label_is_thumb_function_name = false; | |
971 | ||
972 | /* Literal stuff */ | |
973 | ||
974 | #define MAX_LITERAL_POOL_SIZE 1024 | |
975 | ||
976 | typedef struct literalS | |
977 | { | |
978 | struct expressionS exp; | |
979 | struct arm_it * inst; | |
980 | } literalT; | |
981 | ||
982 | literalT literals[MAX_LITERAL_POOL_SIZE]; | |
983 | int next_literal_pool_place = 0; /* Next free entry in the pool */ | |
984 | int lit_pool_num = 1; /* Next literal pool number */ | |
985 | symbolS * current_poolP = NULL; | |
252b5132 RH |
986 | |
987 | static int | |
988 | add_to_lit_pool () | |
989 | { | |
990 | int lit_count = 0; | |
991 | ||
992 | if (current_poolP == NULL) | |
174419c1 ILT |
993 | current_poolP = symbol_create (FAKE_LABEL_NAME, undefined_section, |
994 | (valueT) 0, &zero_address_frag); | |
252b5132 RH |
995 | |
996 | /* Check if this literal value is already in the pool: */ | |
997 | while (lit_count < next_literal_pool_place) | |
998 | { | |
999 | if (literals[lit_count].exp.X_op == inst.reloc.exp.X_op | |
1000 | && inst.reloc.exp.X_op == O_constant | |
1001 | && literals[lit_count].exp.X_add_number == inst.reloc.exp.X_add_number | |
1002 | && literals[lit_count].exp.X_unsigned == inst.reloc.exp.X_unsigned) | |
1003 | break; | |
1004 | lit_count++; | |
1005 | } | |
1006 | ||
1007 | if (lit_count == next_literal_pool_place) /* new entry */ | |
1008 | { | |
1009 | if (next_literal_pool_place > MAX_LITERAL_POOL_SIZE) | |
1010 | { | |
1011 | inst.error = _("Literal Pool Overflow"); | |
1012 | return FAIL; | |
1013 | } | |
1014 | ||
1015 | literals[next_literal_pool_place].exp = inst.reloc.exp; | |
1016 | lit_count = next_literal_pool_place++; | |
1017 | } | |
1018 | ||
1019 | inst.reloc.exp.X_op = O_symbol; | |
1020 | inst.reloc.exp.X_add_number = (lit_count) * 4 - 8; | |
1021 | inst.reloc.exp.X_add_symbol = current_poolP; | |
1022 | ||
1023 | return SUCCESS; | |
1024 | } | |
1025 | ||
1026 | /* Can't use symbol_new here, so have to create a symbol and then at | |
1027 | a later date assign it a value. Thats what these functions do. */ | |
1028 | static void | |
1029 | symbol_locate (symbolP, name, segment, valu, frag) | |
1030 | symbolS * symbolP; | |
1031 | CONST char * name; /* It is copied, the caller can modify */ | |
1032 | segT segment; /* Segment identifier (SEG_<something>) */ | |
1033 | valueT valu; /* Symbol value */ | |
1034 | fragS * frag; /* Associated fragment */ | |
1035 | { | |
1036 | unsigned int name_length; | |
1037 | char * preserved_copy_of_name; | |
1038 | ||
1039 | name_length = strlen (name) + 1; /* +1 for \0 */ | |
1040 | obstack_grow (¬es, name, name_length); | |
1041 | preserved_copy_of_name = obstack_finish (¬es); | |
1042 | #ifdef STRIP_UNDERSCORE | |
1043 | if (preserved_copy_of_name[0] == '_') | |
1044 | preserved_copy_of_name++; | |
1045 | #endif | |
1046 | ||
1047 | #ifdef tc_canonicalize_symbol_name | |
1048 | preserved_copy_of_name = | |
1049 | tc_canonicalize_symbol_name (preserved_copy_of_name); | |
1050 | #endif | |
1051 | ||
1052 | S_SET_NAME (symbolP, preserved_copy_of_name); | |
1053 | ||
1054 | S_SET_SEGMENT (symbolP, segment); | |
1055 | S_SET_VALUE (symbolP, valu); | |
1056 | symbol_clear_list_pointers(symbolP); | |
1057 | ||
174419c1 | 1058 | symbol_set_frag (symbolP, frag); |
252b5132 RH |
1059 | |
1060 | /* Link to end of symbol chain. */ | |
1061 | { | |
1062 | extern int symbol_table_frozen; | |
1063 | if (symbol_table_frozen) | |
1064 | abort (); | |
1065 | } | |
1066 | ||
1067 | symbol_append (symbolP, symbol_lastP, & symbol_rootP, & symbol_lastP); | |
1068 | ||
1069 | obj_symbol_new_hook (symbolP); | |
1070 | ||
1071 | #ifdef tc_symbol_new_hook | |
1072 | tc_symbol_new_hook (symbolP); | |
1073 | #endif | |
1074 | ||
1075 | #ifdef DEBUG_SYMS | |
1076 | verify_symbol_chain (symbol_rootP, symbol_lastP); | |
1077 | #endif /* DEBUG_SYMS */ | |
1078 | } | |
1079 | ||
252b5132 RH |
1080 | /* Check that an immediate is valid, and if so, convert it to the right format. */ |
1081 | ||
1082 | static unsigned int | |
1083 | validate_immediate (val) | |
1084 | unsigned int val; | |
1085 | { | |
1086 | unsigned int a; | |
1087 | unsigned int i; | |
1088 | ||
1089 | #define rotate_left(v, n) (v << n | v >> (32 - n)) | |
1090 | ||
1091 | for (i = 0; i < 32; i += 2) | |
1092 | if ((a = rotate_left (val, i)) <= 0xff) | |
1093 | return a | (i << 7); /* 12-bit pack: [shift-cnt,const] */ | |
1094 | ||
1095 | return FAIL; | |
1096 | } | |
1097 | ||
49a5575c NC |
1098 | /* Check to see if an immediate can be computed as two seperate immediate |
1099 | values, added together. We already know that this value cannot be | |
1100 | computed by just one ARM instruction. */ | |
1101 | ||
1102 | static unsigned int | |
1103 | validate_immediate_twopart (val, highpart) | |
1104 | unsigned int val; | |
1105 | unsigned int * highpart; | |
1106 | { | |
1107 | unsigned int a; | |
1108 | unsigned int i; | |
1109 | ||
1110 | for (i = 0; i < 32; i += 2) | |
1111 | if (((a = rotate_left (val, i)) & 0xff) != 0) | |
1112 | { | |
1113 | if (a & 0xff00) | |
1114 | { | |
1115 | if (a & ~ 0xffff) | |
1116 | continue; | |
1117 | * highpart = (a >> 8) | ((i + 24) << 7); | |
1118 | } | |
1119 | else if (a & 0xff0000) | |
1120 | { | |
1121 | if (a & 0xff000000) | |
1122 | continue; | |
1123 | ||
1124 | * highpart = (a >> 16) | ((i + 16) << 7); | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | assert (a & 0xff000000); | |
1129 | ||
1130 | * highpart = (a >> 24) | ((i + 8) << 7); | |
1131 | } | |
1132 | ||
1133 | return (a & 0xff) | (i << 7); | |
1134 | } | |
1135 | ||
1136 | return FAIL; | |
1137 | } | |
1138 | ||
252b5132 RH |
1139 | static int |
1140 | validate_offset_imm (val, hwse) | |
276b1dc2 | 1141 | unsigned int val; |
252b5132 RH |
1142 | int hwse; |
1143 | { | |
276b1dc2 | 1144 | if ((hwse && val > 255) || val > 4095) |
252b5132 RH |
1145 | return FAIL; |
1146 | return val; | |
1147 | } | |
1148 | ||
1149 | ||
1150 | static void | |
1151 | s_req (a) | |
1152 | int a; | |
1153 | { | |
1154 | as_bad (_("Invalid syntax for .req directive.")); | |
1155 | } | |
1156 | ||
1157 | static void | |
1158 | s_bss (ignore) | |
1159 | int ignore; | |
1160 | { | |
1161 | /* We don't support putting frags in the BSS segment, we fake it by | |
1162 | marking in_bss, then looking at s_skip for clues?.. */ | |
1163 | subseg_set (bss_section, 0); | |
1164 | demand_empty_rest_of_line (); | |
1165 | } | |
1166 | ||
1167 | static void | |
1168 | s_even (ignore) | |
1169 | int ignore; | |
1170 | { | |
1171 | if (!need_pass_2) /* Never make frag if expect extra pass. */ | |
1172 | frag_align (1, 0, 0); | |
1173 | ||
1174 | record_alignment (now_seg, 1); | |
1175 | ||
1176 | demand_empty_rest_of_line (); | |
1177 | } | |
1178 | ||
1179 | static void | |
fed881b1 NC |
1180 | s_ltorg (ignored) |
1181 | int ignored; | |
252b5132 RH |
1182 | { |
1183 | int lit_count = 0; | |
1184 | char sym_name[20]; | |
1185 | ||
1186 | if (current_poolP == NULL) | |
fed881b1 | 1187 | return; |
252b5132 RH |
1188 | |
1189 | /* Align pool as you have word accesses */ | |
1190 | /* Only make a frag if we have to ... */ | |
1191 | if (!need_pass_2) | |
1192 | frag_align (2, 0, 0); | |
1193 | ||
1194 | record_alignment (now_seg, 2); | |
1195 | ||
252b5132 RH |
1196 | sprintf (sym_name, "$$lit_\002%x", lit_pool_num++); |
1197 | ||
1198 | symbol_locate (current_poolP, sym_name, now_seg, | |
1199 | (valueT) frag_now_fix (), frag_now); | |
1200 | symbol_table_insert (current_poolP); | |
1201 | ||
1202 | ARM_SET_THUMB (current_poolP, thumb_mode); | |
1203 | ||
1204 | #if defined OBJ_COFF || defined OBJ_ELF | |
1205 | ARM_SET_INTERWORK (current_poolP, support_interwork); | |
1206 | #endif | |
1207 | ||
1208 | while (lit_count < next_literal_pool_place) | |
1209 | /* First output the expression in the instruction to the pool */ | |
1210 | emit_expr (&(literals[lit_count++].exp), 4); /* .word */ | |
1211 | ||
1212 | next_literal_pool_place = 0; | |
1213 | current_poolP = NULL; | |
1214 | } | |
1215 | ||
1216 | static void | |
1217 | s_align (unused) /* Same as s_align_ptwo but align 0 => align 2 */ | |
1218 | int unused; | |
1219 | { | |
1220 | register int temp; | |
1221 | register long temp_fill; | |
1222 | long max_alignment = 15; | |
1223 | ||
1224 | temp = get_absolute_expression (); | |
1225 | if (temp > max_alignment) | |
1226 | as_bad (_("Alignment too large: %d. assumed."), temp = max_alignment); | |
1227 | else if (temp < 0) | |
1228 | { | |
1229 | as_bad (_("Alignment negative. 0 assumed.")); | |
1230 | temp = 0; | |
1231 | } | |
1232 | ||
1233 | if (*input_line_pointer == ',') | |
1234 | { | |
1235 | input_line_pointer++; | |
1236 | temp_fill = get_absolute_expression (); | |
1237 | } | |
1238 | else | |
1239 | temp_fill = 0; | |
1240 | ||
1241 | if (!temp) | |
1242 | temp = 2; | |
1243 | ||
1244 | /* Only make a frag if we HAVE to. . . */ | |
1245 | if (temp && !need_pass_2) | |
1246 | frag_align (temp, (int) temp_fill, 0); | |
1247 | demand_empty_rest_of_line (); | |
1248 | ||
1249 | record_alignment (now_seg, temp); | |
1250 | } | |
1251 | ||
1252 | static void | |
1253 | s_force_thumb (ignore) | |
1254 | int ignore; | |
1255 | { | |
1256 | /* If we are not already in thumb mode go into it, EVEN if | |
1257 | the target processor does not support thumb instructions. | |
1258 | This is used by gcc/config/arm/lib1funcs.asm for example | |
1259 | to compile interworking support functions even if the | |
1260 | target processor should not support interworking. */ | |
1261 | ||
1262 | if (! thumb_mode) | |
1263 | { | |
a64bcdd8 | 1264 | thumb_mode = 2; |
252b5132 RH |
1265 | |
1266 | record_alignment (now_seg, 1); | |
1267 | } | |
1268 | ||
1269 | demand_empty_rest_of_line (); | |
1270 | } | |
1271 | ||
1272 | static void | |
1273 | s_thumb_func (ignore) | |
1274 | int ignore; | |
1275 | { | |
1276 | /* The following label is the name/address of the start of a Thumb function. | |
1277 | We need to know this for the interworking support. */ | |
1278 | ||
1279 | label_is_thumb_function_name = true; | |
1280 | ||
1281 | demand_empty_rest_of_line (); | |
1282 | } | |
1283 | ||
fed881b1 NC |
1284 | /* Perform a .set directive, but also mark the alias as |
1285 | being a thumb function. */ | |
1286 | ||
1287 | static void | |
1288 | s_thumb_set (equiv) | |
1289 | int equiv; | |
1290 | { | |
1291 | /* XXX the following is a duplicate of the code for s_set() in read.c | |
1292 | We cannot just call that code as we need to get at the symbol that | |
1293 | is created. */ | |
1294 | register char * name; | |
1295 | register char delim; | |
1296 | register char * end_name; | |
1297 | register symbolS * symbolP; | |
1298 | ||
1299 | /* | |
1300 | * Especial apologies for the random logic: | |
1301 | * this just grew, and could be parsed much more simply! | |
1302 | * Dean in haste. | |
1303 | */ | |
1304 | name = input_line_pointer; | |
1305 | delim = get_symbol_end (); | |
1306 | end_name = input_line_pointer; | |
1307 | *end_name = delim; | |
1308 | ||
1309 | SKIP_WHITESPACE (); | |
1310 | ||
1311 | if (*input_line_pointer != ',') | |
1312 | { | |
1313 | *end_name = 0; | |
1314 | as_bad (_("Expected comma after name \"%s\""), name); | |
1315 | *end_name = delim; | |
1316 | ignore_rest_of_line (); | |
1317 | return; | |
1318 | } | |
1319 | ||
1320 | input_line_pointer++; | |
1321 | *end_name = 0; | |
1322 | ||
1323 | if (name[0] == '.' && name[1] == '\0') | |
1324 | { | |
1325 | /* XXX - this should not happen to .thumb_set */ | |
1326 | abort (); | |
1327 | } | |
1328 | ||
1329 | if ((symbolP = symbol_find (name)) == NULL | |
1330 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
1331 | { | |
1332 | #ifndef NO_LISTING | |
1333 | /* When doing symbol listings, play games with dummy fragments living | |
1334 | outside the normal fragment chain to record the file and line info | |
1335 | for this symbol. */ | |
1336 | if (listing & LISTING_SYMBOLS) | |
1337 | { | |
1338 | extern struct list_info_struct * listing_tail; | |
1339 | fragS * dummy_frag = (fragS *) xmalloc (sizeof(fragS)); | |
1340 | memset (dummy_frag, 0, sizeof(fragS)); | |
1341 | dummy_frag->fr_type = rs_fill; | |
1342 | dummy_frag->line = listing_tail; | |
1343 | symbolP = symbol_new (name, undefined_section, 0, dummy_frag); | |
1344 | dummy_frag->fr_symbol = symbolP; | |
1345 | } | |
1346 | else | |
1347 | #endif | |
1348 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); | |
1349 | ||
1350 | #ifdef OBJ_COFF | |
1351 | /* "set" symbols are local unless otherwise specified. */ | |
1352 | SF_SET_LOCAL (symbolP); | |
1353 | #endif /* OBJ_COFF */ | |
1354 | } /* make a new symbol */ | |
1355 | ||
1356 | symbol_table_insert (symbolP); | |
1357 | ||
1358 | * end_name = delim; | |
1359 | ||
1360 | if (equiv | |
1361 | && S_IS_DEFINED (symbolP) | |
1362 | && S_GET_SEGMENT (symbolP) != reg_section) | |
1363 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
1364 | ||
1365 | pseudo_set (symbolP); | |
1366 | ||
1367 | demand_empty_rest_of_line (); | |
1368 | ||
ae5ad4ad | 1369 | /* XXX Now we come to the Thumb specific bit of code. */ |
fed881b1 NC |
1370 | |
1371 | THUMB_SET_FUNC (symbolP, 1); | |
1372 | ARM_SET_THUMB (symbolP, 1); | |
92a66162 | 1373 | #if defined OBJ_ELF || defined OBJ_COFF |
fed881b1 | 1374 | ARM_SET_INTERWORK (symbolP, support_interwork); |
325188ec | 1375 | #endif |
fed881b1 NC |
1376 | } |
1377 | ||
1378 | /* If we change section we must dump the literal pool first. */ | |
1379 | static void | |
1380 | arm_s_text (ignore) | |
1381 | int ignore; | |
1382 | { | |
1383 | if (now_seg != text_section) | |
1384 | s_ltorg (0); | |
1385 | ||
1386 | s_text (ignore); | |
1387 | } | |
1388 | ||
1389 | static void | |
1390 | arm_s_data (ignore) | |
1391 | int ignore; | |
1392 | { | |
1393 | if (flag_readonly_data_in_text) | |
1394 | { | |
1395 | if (now_seg != text_section) | |
1396 | s_ltorg (0); | |
1397 | } | |
1398 | else if (now_seg != data_section) | |
1399 | s_ltorg (0); | |
1400 | ||
1401 | s_data (ignore); | |
1402 | } | |
1403 | ||
1404 | #ifdef OBJ_ELF | |
1405 | static void | |
1406 | arm_s_section (ignore) | |
1407 | int ignore; | |
1408 | { | |
1409 | s_ltorg (0); | |
1410 | ||
1411 | obj_elf_section (ignore); | |
1412 | } | |
1413 | #endif | |
1414 | ||
252b5132 RH |
1415 | static void |
1416 | opcode_select (width) | |
1417 | int width; | |
1418 | { | |
1419 | switch (width) | |
1420 | { | |
1421 | case 16: | |
1422 | if (! thumb_mode) | |
1423 | { | |
1424 | if (! (cpu_variant & ARM_THUMB)) | |
1425 | as_bad (_("selected processor does not support THUMB opcodes")); | |
1426 | thumb_mode = 1; | |
1427 | /* No need to force the alignment, since we will have been | |
1428 | coming from ARM mode, which is word-aligned. */ | |
1429 | record_alignment (now_seg, 1); | |
1430 | } | |
1431 | break; | |
1432 | ||
1433 | case 32: | |
1434 | if (thumb_mode) | |
1435 | { | |
1436 | if ((cpu_variant & ARM_ANY) == ARM_THUMB) | |
1437 | as_bad (_("selected processor does not support ARM opcodes")); | |
1438 | thumb_mode = 0; | |
1439 | if (!need_pass_2) | |
1440 | frag_align (2, 0, 0); | |
1441 | record_alignment (now_seg, 1); | |
1442 | } | |
1443 | break; | |
1444 | ||
1445 | default: | |
1446 | as_bad (_("invalid instruction size selected (%d)"), width); | |
1447 | } | |
1448 | } | |
1449 | ||
1450 | static void | |
1451 | s_arm (ignore) | |
1452 | int ignore; | |
1453 | { | |
1454 | opcode_select (32); | |
1455 | demand_empty_rest_of_line (); | |
1456 | } | |
1457 | ||
1458 | static void | |
1459 | s_thumb (ignore) | |
1460 | int ignore; | |
1461 | { | |
1462 | opcode_select (16); | |
1463 | demand_empty_rest_of_line (); | |
1464 | } | |
1465 | ||
1466 | static void | |
1467 | s_code (unused) | |
1468 | int unused; | |
1469 | { | |
1470 | register int temp; | |
1471 | ||
1472 | temp = get_absolute_expression (); | |
1473 | switch (temp) | |
1474 | { | |
1475 | case 16: | |
1476 | case 32: | |
1477 | opcode_select (temp); | |
1478 | break; | |
1479 | ||
1480 | default: | |
1481 | as_bad (_("invalid operand to .code directive (%d) (expecting 16 or 32)"), temp); | |
1482 | } | |
1483 | } | |
1484 | ||
1485 | static void | |
1486 | end_of_line (str) | |
1487 | char * str; | |
1488 | { | |
ae5ad4ad | 1489 | skip_whitespace (str); |
252b5132 | 1490 | |
ae5ad4ad | 1491 | if (* str != '\0') |
252b5132 RH |
1492 | inst.error = _("Garbage following instruction"); |
1493 | } | |
1494 | ||
1495 | static int | |
1496 | skip_past_comma (str) | |
1497 | char ** str; | |
1498 | { | |
1499 | char *p = *str, c; | |
1500 | int comma = 0; | |
1501 | ||
1502 | while ((c = *p) == ' ' || c == ',') | |
1503 | { | |
1504 | p++; | |
1505 | if (c == ',' && comma++) | |
1506 | return FAIL; | |
1507 | } | |
1508 | ||
1509 | if (c == '\0') | |
1510 | return FAIL; | |
1511 | ||
1512 | *str = p; | |
1513 | return comma ? SUCCESS : FAIL; | |
1514 | } | |
1515 | ||
acb56623 JL |
1516 | /* A standard register must be given at this point. |
1517 | Shift is the place to put it in inst.instruction. | |
1518 | Restores input start point on err. | |
1519 | Returns the reg#, or FAIL. */ | |
252b5132 RH |
1520 | |
1521 | static int | |
1522 | reg_required_here (str, shift) | |
1523 | char ** str; | |
1524 | int shift; | |
1525 | { | |
1526 | static char buff [128]; /* XXX */ | |
1527 | int reg; | |
1528 | char * start = *str; | |
1529 | ||
1530 | if ((reg = arm_reg_parse (str)) != FAIL && int_register (reg)) | |
1531 | { | |
1532 | if (shift >= 0) | |
1533 | inst.instruction |= reg << shift; | |
1534 | return reg; | |
1535 | } | |
1536 | ||
1537 | /* Restore the start point, we may have got a reg of the wrong class. */ | |
1538 | *str = start; | |
1539 | ||
1540 | /* In the few cases where we might be able to accept something else | |
ae5ad4ad | 1541 | this error can be overridden. */ |
252b5132 RH |
1542 | sprintf (buff, _("Register expected, not '%.100s'"), start); |
1543 | inst.error = buff; | |
1544 | ||
1545 | return FAIL; | |
1546 | } | |
1547 | ||
1548 | static int | |
1549 | psr_required_here (str, cpsr, spsr) | |
1550 | char ** str; | |
1551 | int cpsr; | |
1552 | int spsr; | |
1553 | { | |
1554 | int psr; | |
1555 | char * start = *str; | |
1556 | psr = arm_psr_parse (str); | |
1557 | ||
1558 | if (psr == cpsr || psr == spsr) | |
1559 | { | |
1560 | if (psr == spsr) | |
1561 | inst.instruction |= 1 << 22; | |
1562 | ||
1563 | return SUCCESS; | |
1564 | } | |
1565 | ||
1566 | /* In the few cases where we might be able to accept something else | |
ae5ad4ad | 1567 | this error can be overridden. */ |
252b5132 RH |
1568 | inst.error = _("<psr(f)> expected"); |
1569 | ||
1570 | /* Restore the start point. */ | |
1571 | *str = start; | |
1572 | return FAIL; | |
1573 | } | |
1574 | ||
1575 | static int | |
1576 | co_proc_number (str) | |
ae5ad4ad | 1577 | char ** str; |
252b5132 RH |
1578 | { |
1579 | int processor, pchar; | |
1580 | ||
ae5ad4ad | 1581 | skip_whitespace (* str); |
252b5132 RH |
1582 | |
1583 | /* The data sheet seems to imply that just a number on its own is valid | |
1584 | here, but the RISC iX assembler seems to accept a prefix 'p'. We will | |
1585 | accept either. */ | |
1586 | if (**str == 'p' || **str == 'P') | |
1587 | (*str)++; | |
1588 | ||
1589 | pchar = *(*str)++; | |
1590 | if (pchar >= '0' && pchar <= '9') | |
1591 | { | |
1592 | processor = pchar - '0'; | |
1593 | if (**str >= '0' && **str <= '9') | |
1594 | { | |
1595 | processor = processor * 10 + *(*str)++ - '0'; | |
1596 | if (processor > 15) | |
1597 | { | |
1598 | inst.error = _("Illegal co-processor number"); | |
1599 | return FAIL; | |
1600 | } | |
1601 | } | |
1602 | } | |
1603 | else | |
1604 | { | |
1605 | inst.error = _("Bad or missing co-processor number"); | |
1606 | return FAIL; | |
1607 | } | |
1608 | ||
1609 | inst.instruction |= processor << 8; | |
1610 | return SUCCESS; | |
1611 | } | |
1612 | ||
1613 | static int | |
1614 | cp_opc_expr (str, where, length) | |
1615 | char ** str; | |
1616 | int where; | |
1617 | int length; | |
1618 | { | |
1619 | expressionS expr; | |
1620 | ||
ae5ad4ad | 1621 | skip_whitespace (* str); |
252b5132 RH |
1622 | |
1623 | memset (&expr, '\0', sizeof (expr)); | |
1624 | ||
1625 | if (my_get_expression (&expr, str)) | |
1626 | return FAIL; | |
1627 | if (expr.X_op != O_constant) | |
1628 | { | |
1629 | inst.error = _("bad or missing expression"); | |
1630 | return FAIL; | |
1631 | } | |
1632 | ||
1633 | if ((expr.X_add_number & ((1 << length) - 1)) != expr.X_add_number) | |
1634 | { | |
1635 | inst.error = _("immediate co-processor expression too large"); | |
1636 | return FAIL; | |
1637 | } | |
1638 | ||
1639 | inst.instruction |= expr.X_add_number << where; | |
1640 | return SUCCESS; | |
1641 | } | |
1642 | ||
1643 | static int | |
1644 | cp_reg_required_here (str, where) | |
1645 | char ** str; | |
1646 | int where; | |
1647 | { | |
1648 | int reg; | |
1649 | char * start = *str; | |
1650 | ||
1651 | if ((reg = arm_reg_parse (str)) != FAIL && cp_register (reg)) | |
1652 | { | |
1653 | reg &= 15; | |
1654 | inst.instruction |= reg << where; | |
1655 | return reg; | |
1656 | } | |
1657 | ||
1658 | /* In the few cases where we might be able to accept something else | |
ae5ad4ad | 1659 | this error can be overridden. */ |
252b5132 RH |
1660 | inst.error = _("Co-processor register expected"); |
1661 | ||
ae5ad4ad | 1662 | /* Restore the start point. */ |
252b5132 RH |
1663 | *str = start; |
1664 | return FAIL; | |
1665 | } | |
1666 | ||
1667 | static int | |
1668 | fp_reg_required_here (str, where) | |
1669 | char ** str; | |
1670 | int where; | |
1671 | { | |
1672 | int reg; | |
1673 | char * start = *str; | |
1674 | ||
1675 | if ((reg = arm_reg_parse (str)) != FAIL && fp_register (reg)) | |
1676 | { | |
1677 | reg &= 7; | |
1678 | inst.instruction |= reg << where; | |
1679 | return reg; | |
1680 | } | |
1681 | ||
1682 | /* In the few cases where we might be able to accept something else | |
ae5ad4ad | 1683 | this error can be overridden. */ |
252b5132 RH |
1684 | inst.error = _("Floating point register expected"); |
1685 | ||
ae5ad4ad | 1686 | /* Restore the start point. */ |
252b5132 RH |
1687 | *str = start; |
1688 | return FAIL; | |
1689 | } | |
1690 | ||
1691 | static int | |
1692 | cp_address_offset (str) | |
1693 | char ** str; | |
1694 | { | |
1695 | int offset; | |
1696 | ||
ae5ad4ad | 1697 | skip_whitespace (* str); |
252b5132 RH |
1698 | |
1699 | if (! is_immediate_prefix (**str)) | |
1700 | { | |
1701 | inst.error = _("immediate expression expected"); | |
1702 | return FAIL; | |
1703 | } | |
1704 | ||
1705 | (*str)++; | |
1706 | ||
1707 | if (my_get_expression (& inst.reloc.exp, str)) | |
1708 | return FAIL; | |
1709 | ||
1710 | if (inst.reloc.exp.X_op == O_constant) | |
1711 | { | |
1712 | offset = inst.reloc.exp.X_add_number; | |
1713 | ||
1714 | if (offset & 3) | |
1715 | { | |
1716 | inst.error = _("co-processor address must be word aligned"); | |
1717 | return FAIL; | |
1718 | } | |
1719 | ||
1720 | if (offset > 1023 || offset < -1023) | |
1721 | { | |
1722 | inst.error = _("offset too large"); | |
1723 | return FAIL; | |
1724 | } | |
1725 | ||
1726 | if (offset >= 0) | |
1727 | inst.instruction |= INDEX_UP; | |
1728 | else | |
1729 | offset = -offset; | |
1730 | ||
1731 | inst.instruction |= offset >> 2; | |
1732 | } | |
1733 | else | |
1734 | inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; | |
1735 | ||
1736 | return SUCCESS; | |
1737 | } | |
1738 | ||
1739 | static int | |
1740 | cp_address_required_here (str) | |
1741 | char ** str; | |
1742 | { | |
1743 | char * p = * str; | |
1744 | int pre_inc = 0; | |
1745 | int write_back = 0; | |
1746 | ||
1747 | if (*p == '[') | |
1748 | { | |
1749 | int reg; | |
1750 | ||
1751 | p++; | |
ae5ad4ad | 1752 | skip_whitespace (p); |
252b5132 RH |
1753 | |
1754 | if ((reg = reg_required_here (& p, 16)) == FAIL) | |
1755 | return FAIL; | |
1756 | ||
ae5ad4ad | 1757 | skip_whitespace (p); |
252b5132 RH |
1758 | |
1759 | if (*p == ']') | |
1760 | { | |
1761 | p++; | |
1762 | ||
1763 | if (skip_past_comma (& p) == SUCCESS) | |
1764 | { | |
1765 | /* [Rn], #expr */ | |
1766 | write_back = WRITE_BACK; | |
1767 | ||
1768 | if (reg == REG_PC) | |
1769 | { | |
1770 | inst.error = _("pc may not be used in post-increment"); | |
1771 | return FAIL; | |
1772 | } | |
1773 | ||
1774 | if (cp_address_offset (& p) == FAIL) | |
1775 | return FAIL; | |
1776 | } | |
1777 | else | |
1778 | pre_inc = PRE_INDEX | INDEX_UP; | |
1779 | } | |
1780 | else | |
1781 | { | |
1782 | /* '['Rn, #expr']'[!] */ | |
1783 | ||
1784 | if (skip_past_comma (& p) == FAIL) | |
1785 | { | |
1786 | inst.error = _("pre-indexed expression expected"); | |
1787 | return FAIL; | |
1788 | } | |
1789 | ||
1790 | pre_inc = PRE_INDEX; | |
1791 | ||
1792 | if (cp_address_offset (& p) == FAIL) | |
1793 | return FAIL; | |
1794 | ||
ae5ad4ad | 1795 | skip_whitespace (p); |
252b5132 RH |
1796 | |
1797 | if (*p++ != ']') | |
1798 | { | |
1799 | inst.error = _("missing ]"); | |
1800 | return FAIL; | |
1801 | } | |
1802 | ||
ae5ad4ad | 1803 | skip_whitespace (p); |
252b5132 RH |
1804 | |
1805 | if (*p == '!') | |
1806 | { | |
1807 | if (reg == REG_PC) | |
1808 | { | |
1809 | inst.error = _("pc may not be used with write-back"); | |
1810 | return FAIL; | |
1811 | } | |
1812 | ||
1813 | p++; | |
1814 | write_back = WRITE_BACK; | |
1815 | } | |
1816 | } | |
1817 | } | |
1818 | else | |
1819 | { | |
1820 | if (my_get_expression (&inst.reloc.exp, &p)) | |
1821 | return FAIL; | |
1822 | ||
1823 | inst.reloc.type = BFD_RELOC_ARM_CP_OFF_IMM; | |
1824 | inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ | |
1825 | inst.reloc.pc_rel = 1; | |
1826 | inst.instruction |= (REG_PC << 16); | |
1827 | pre_inc = PRE_INDEX; | |
1828 | } | |
1829 | ||
1830 | inst.instruction |= write_back | pre_inc; | |
1831 | *str = p; | |
1832 | return SUCCESS; | |
1833 | } | |
1834 | ||
1835 | static void | |
1836 | do_nop (str, flags) | |
1837 | char * str; | |
1838 | unsigned long flags; | |
1839 | { | |
ae5ad4ad NC |
1840 | /* Do nothing really. */ |
1841 | inst.instruction |= flags; /* This is pointless. */ | |
252b5132 RH |
1842 | end_of_line (str); |
1843 | return; | |
1844 | } | |
1845 | ||
1846 | static void | |
1847 | do_mrs (str, flags) | |
1848 | char *str; | |
1849 | unsigned long flags; | |
1850 | { | |
ae5ad4ad NC |
1851 | /* Only one syntax. */ |
1852 | skip_whitespace (str); | |
252b5132 RH |
1853 | |
1854 | if (reg_required_here (&str, 12) == FAIL) | |
1855 | { | |
90ca882f | 1856 | inst.error = BAD_ARGS; |
252b5132 RH |
1857 | return; |
1858 | } | |
1859 | ||
1860 | if (skip_past_comma (&str) == FAIL | |
1861 | || psr_required_here (& str, CPSR_ALL, SPSR_ALL) == FAIL) | |
1862 | { | |
1863 | inst.error = _("<psr> expected"); | |
1864 | return; | |
1865 | } | |
1866 | ||
1867 | inst.instruction |= flags; | |
1868 | end_of_line (str); | |
1869 | return; | |
1870 | } | |
1871 | ||
ae5ad4ad | 1872 | /* Three possible forms: "<psr>, Rm", "<psrf>, Rm", "<psrf>, #expression". */ |
252b5132 RH |
1873 | static void |
1874 | do_msr (str, flags) | |
1875 | char * str; | |
1876 | unsigned long flags; | |
1877 | { | |
1878 | int reg; | |
1879 | ||
ae5ad4ad | 1880 | skip_whitespace (str); |
252b5132 RH |
1881 | |
1882 | if (psr_required_here (&str, CPSR_ALL, SPSR_ALL) == SUCCESS) | |
1883 | { | |
1884 | inst.instruction |= PSR_ALL; | |
1885 | ||
1886 | /* Sytax should be "<psr>, Rm" */ | |
1887 | if (skip_past_comma (&str) == FAIL | |
1888 | || (reg = reg_required_here (&str, 0)) == FAIL) | |
1889 | { | |
90ca882f | 1890 | inst.error = BAD_ARGS; |
252b5132 RH |
1891 | return; |
1892 | } | |
1893 | } | |
1894 | else | |
1895 | { | |
1896 | if (psr_required_here (& str, CPSR_FLG, SPSR_FLG) == SUCCESS) | |
1897 | inst.instruction |= PSR_FLAGS; | |
1898 | else if (psr_required_here (& str, CPSR_CTL, SPSR_CTL) == SUCCESS) | |
1899 | inst.instruction |= PSR_CONTROL; | |
1900 | else | |
1901 | { | |
90ca882f | 1902 | inst.error = BAD_ARGS; |
252b5132 RH |
1903 | return; |
1904 | } | |
1905 | ||
1906 | if (skip_past_comma (&str) == FAIL) | |
1907 | { | |
90ca882f | 1908 | inst.error = BAD_ARGS; |
252b5132 RH |
1909 | return; |
1910 | } | |
1911 | ||
1912 | /* Syntax could be "<psrf>, rm", "<psrf>, #expression" */ | |
1913 | ||
1914 | if ((reg = reg_required_here (& str, 0)) != FAIL) | |
1915 | ; | |
ae5ad4ad | 1916 | /* Immediate expression. */ |
252b5132 RH |
1917 | else if (is_immediate_prefix (* str)) |
1918 | { | |
1919 | str ++; | |
1920 | inst.error = NULL; | |
1921 | ||
1922 | if (my_get_expression (& inst.reloc.exp, & str)) | |
1923 | { | |
1924 | inst.error = _("Register or shift expression expected"); | |
1925 | return; | |
1926 | } | |
1927 | ||
1928 | if (inst.reloc.exp.X_add_symbol) | |
1929 | { | |
1930 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
1931 | inst.reloc.pc_rel = 0; | |
1932 | } | |
1933 | else | |
1934 | { | |
1935 | unsigned value = validate_immediate (inst.reloc.exp.X_add_number); | |
1936 | if (value == FAIL) | |
1937 | { | |
1938 | inst.error = _("Invalid constant"); | |
1939 | return; | |
1940 | } | |
1941 | ||
1942 | inst.instruction |= value; | |
1943 | } | |
1944 | ||
1945 | flags |= INST_IMMEDIATE; | |
1946 | } | |
1947 | else | |
1948 | { | |
1949 | inst.error = _("Error: unrecognised syntax for second argument to msr instruction"); | |
1950 | return; | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | inst.error = NULL; | |
1955 | inst.instruction |= flags; | |
1956 | end_of_line (str); | |
1957 | return; | |
1958 | } | |
1959 | ||
1960 | /* Long Multiply Parser | |
1961 | UMULL RdLo, RdHi, Rm, Rs | |
1962 | SMULL RdLo, RdHi, Rm, Rs | |
1963 | UMLAL RdLo, RdHi, Rm, Rs | |
1964 | SMLAL RdLo, RdHi, Rm, Rs | |
1965 | */ | |
1966 | static void | |
1967 | do_mull (str, flags) | |
1968 | char * str; | |
1969 | unsigned long flags; | |
1970 | { | |
1971 | int rdlo, rdhi, rm, rs; | |
1972 | ||
ae5ad4ad NC |
1973 | /* Only one format "rdlo, rdhi, rm, rs" */ |
1974 | skip_whitespace (str); | |
252b5132 RH |
1975 | |
1976 | if ((rdlo = reg_required_here (&str, 12)) == FAIL) | |
1977 | { | |
90ca882f | 1978 | inst.error = BAD_ARGS; |
252b5132 RH |
1979 | return; |
1980 | } | |
1981 | ||
1982 | if (skip_past_comma (&str) == FAIL | |
1983 | || (rdhi = reg_required_here (&str, 16)) == FAIL) | |
1984 | { | |
90ca882f | 1985 | inst.error = BAD_ARGS; |
252b5132 RH |
1986 | return; |
1987 | } | |
1988 | ||
1989 | if (skip_past_comma (&str) == FAIL | |
1990 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
1991 | { | |
90ca882f | 1992 | inst.error = BAD_ARGS; |
252b5132 RH |
1993 | return; |
1994 | } | |
1995 | ||
1996 | /* rdhi, rdlo and rm must all be different */ | |
1997 | if (rdlo == rdhi || rdlo == rm || rdhi == rm) | |
1998 | as_tsktsk (_("rdhi, rdlo and rm must all be different")); | |
1999 | ||
2000 | if (skip_past_comma (&str) == FAIL | |
2001 | || (rs = reg_required_here (&str, 8)) == FAIL) | |
2002 | { | |
90ca882f | 2003 | inst.error = BAD_ARGS; |
252b5132 RH |
2004 | return; |
2005 | } | |
2006 | ||
2007 | if (rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC || rdhi == REG_PC) | |
2008 | { | |
90ca882f | 2009 | inst.error = BAD_PC; |
252b5132 RH |
2010 | return; |
2011 | } | |
2012 | ||
2013 | inst.instruction |= flags; | |
2014 | end_of_line (str); | |
2015 | return; | |
2016 | } | |
2017 | ||
2018 | static void | |
2019 | do_mul (str, flags) | |
2020 | char * str; | |
2021 | unsigned long flags; | |
2022 | { | |
2023 | int rd, rm; | |
2024 | ||
ae5ad4ad NC |
2025 | /* Only one format "rd, rm, rs" */ |
2026 | skip_whitespace (str); | |
252b5132 RH |
2027 | |
2028 | if ((rd = reg_required_here (&str, 16)) == FAIL) | |
2029 | { | |
90ca882f | 2030 | inst.error = BAD_ARGS; |
252b5132 RH |
2031 | return; |
2032 | } | |
2033 | ||
2034 | if (rd == REG_PC) | |
2035 | { | |
90ca882f | 2036 | inst.error = BAD_PC; |
252b5132 RH |
2037 | return; |
2038 | } | |
2039 | ||
2040 | if (skip_past_comma (&str) == FAIL | |
2041 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
2042 | { | |
90ca882f | 2043 | inst.error = BAD_ARGS; |
252b5132 RH |
2044 | return; |
2045 | } | |
2046 | ||
2047 | if (rm == REG_PC) | |
2048 | { | |
90ca882f | 2049 | inst.error = BAD_PC; |
252b5132 RH |
2050 | return; |
2051 | } | |
2052 | ||
2053 | if (rm == rd) | |
2054 | as_tsktsk (_("rd and rm should be different in mul")); | |
2055 | ||
2056 | if (skip_past_comma (&str) == FAIL | |
2057 | || (rm = reg_required_here (&str, 8)) == FAIL) | |
2058 | { | |
90ca882f | 2059 | inst.error = BAD_ARGS; |
252b5132 RH |
2060 | return; |
2061 | } | |
2062 | ||
2063 | if (rm == REG_PC) | |
2064 | { | |
90ca882f | 2065 | inst.error = BAD_PC; |
252b5132 RH |
2066 | return; |
2067 | } | |
2068 | ||
2069 | inst.instruction |= flags; | |
2070 | end_of_line (str); | |
2071 | return; | |
2072 | } | |
2073 | ||
2074 | static void | |
2075 | do_mla (str, flags) | |
2076 | char * str; | |
2077 | unsigned long flags; | |
2078 | { | |
2079 | int rd, rm; | |
2080 | ||
ae5ad4ad NC |
2081 | /* Only one format "rd, rm, rs, rn" */ |
2082 | skip_whitespace (str); | |
252b5132 RH |
2083 | |
2084 | if ((rd = reg_required_here (&str, 16)) == FAIL) | |
2085 | { | |
90ca882f | 2086 | inst.error = BAD_ARGS; |
252b5132 RH |
2087 | return; |
2088 | } | |
2089 | ||
2090 | if (rd == REG_PC) | |
2091 | { | |
90ca882f | 2092 | inst.error = BAD_PC; |
252b5132 RH |
2093 | return; |
2094 | } | |
2095 | ||
2096 | if (skip_past_comma (&str) == FAIL | |
2097 | || (rm = reg_required_here (&str, 0)) == FAIL) | |
2098 | { | |
90ca882f | 2099 | inst.error = BAD_ARGS; |
252b5132 RH |
2100 | return; |
2101 | } | |
2102 | ||
2103 | if (rm == REG_PC) | |
2104 | { | |
90ca882f | 2105 | inst.error = BAD_PC; |
252b5132 RH |
2106 | return; |
2107 | } | |
2108 | ||
2109 | if (rm == rd) | |
2110 | as_tsktsk (_("rd and rm should be different in mla")); | |
2111 | ||
2112 | if (skip_past_comma (&str) == FAIL | |
2113 | || (rd = reg_required_here (&str, 8)) == FAIL | |
2114 | || skip_past_comma (&str) == FAIL | |
2115 | || (rm = reg_required_here (&str, 12)) == FAIL) | |
2116 | { | |
90ca882f | 2117 | inst.error = BAD_ARGS; |
252b5132 RH |
2118 | return; |
2119 | } | |
2120 | ||
2121 | if (rd == REG_PC || rm == REG_PC) | |
2122 | { | |
90ca882f | 2123 | inst.error = BAD_PC; |
252b5132 RH |
2124 | return; |
2125 | } | |
2126 | ||
2127 | inst.instruction |= flags; | |
2128 | end_of_line (str); | |
2129 | return; | |
2130 | } | |
2131 | ||
2132 | /* Returns the index into fp_values of a floating point number, or -1 if | |
2133 | not in the table. */ | |
2134 | static int | |
2135 | my_get_float_expression (str) | |
2136 | char ** str; | |
2137 | { | |
2138 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
2139 | char * save_in; | |
2140 | expressionS exp; | |
2141 | int i; | |
2142 | int j; | |
2143 | ||
2144 | memset (words, 0, MAX_LITTLENUMS * sizeof (LITTLENUM_TYPE)); | |
2145 | /* Look for a raw floating point number */ | |
2146 | if ((save_in = atof_ieee (*str, 'x', words)) != NULL | |
2147 | && (is_end_of_line [(int)(*save_in)] || *save_in == '\0')) | |
2148 | { | |
2149 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
2150 | { | |
2151 | for (j = 0; j < MAX_LITTLENUMS; j++) | |
2152 | { | |
2153 | if (words[j] != fp_values[i][j]) | |
2154 | break; | |
2155 | } | |
2156 | ||
2157 | if (j == MAX_LITTLENUMS) | |
2158 | { | |
2159 | *str = save_in; | |
2160 | return i; | |
2161 | } | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | /* Try and parse a more complex expression, this will probably fail | |
2166 | unless the code uses a floating point prefix (eg "0f") */ | |
2167 | save_in = input_line_pointer; | |
2168 | input_line_pointer = *str; | |
2169 | if (expression (&exp) == absolute_section | |
2170 | && exp.X_op == O_big | |
2171 | && exp.X_add_number < 0) | |
2172 | { | |
2173 | /* FIXME: 5 = X_PRECISION, should be #define'd where we can use it. | |
2174 | Ditto for 15. */ | |
2175 | if (gen_to_words (words, 5, (long)15) == 0) | |
2176 | { | |
2177 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
2178 | { | |
2179 | for (j = 0; j < MAX_LITTLENUMS; j++) | |
2180 | { | |
2181 | if (words[j] != fp_values[i][j]) | |
2182 | break; | |
2183 | } | |
2184 | ||
2185 | if (j == MAX_LITTLENUMS) | |
2186 | { | |
2187 | *str = input_line_pointer; | |
2188 | input_line_pointer = save_in; | |
2189 | return i; | |
2190 | } | |
2191 | } | |
2192 | } | |
2193 | } | |
2194 | ||
2195 | *str = input_line_pointer; | |
2196 | input_line_pointer = save_in; | |
2197 | return -1; | |
2198 | } | |
2199 | ||
2200 | /* Return true if anything in the expression is a bignum */ | |
2201 | static int | |
2202 | walk_no_bignums (sp) | |
2203 | symbolS * sp; | |
2204 | { | |
174419c1 | 2205 | if (symbol_get_value_expression (sp)->X_op == O_big) |
252b5132 RH |
2206 | return 1; |
2207 | ||
174419c1 | 2208 | if (symbol_get_value_expression (sp)->X_add_symbol) |
252b5132 | 2209 | { |
174419c1 ILT |
2210 | return (walk_no_bignums (symbol_get_value_expression (sp)->X_add_symbol) |
2211 | || (symbol_get_value_expression (sp)->X_op_symbol | |
2212 | && walk_no_bignums (symbol_get_value_expression (sp)->X_op_symbol))); | |
252b5132 RH |
2213 | } |
2214 | ||
2215 | return 0; | |
2216 | } | |
2217 | ||
2218 | static int | |
2219 | my_get_expression (ep, str) | |
2220 | expressionS * ep; | |
2221 | char ** str; | |
2222 | { | |
2223 | char * save_in; | |
2224 | segT seg; | |
2225 | ||
2226 | save_in = input_line_pointer; | |
2227 | input_line_pointer = *str; | |
2228 | seg = expression (ep); | |
2229 | ||
2230 | #ifdef OBJ_AOUT | |
2231 | if (seg != absolute_section | |
2232 | && seg != text_section | |
2233 | && seg != data_section | |
2234 | && seg != bss_section | |
2235 | && seg != undefined_section) | |
2236 | { | |
2237 | inst.error = _("bad_segment"); | |
2238 | *str = input_line_pointer; | |
2239 | input_line_pointer = save_in; | |
2240 | return 1; | |
2241 | } | |
2242 | #endif | |
2243 | ||
2244 | /* Get rid of any bignums now, so that we don't generate an error for which | |
2245 | we can't establish a line number later on. Big numbers are never valid | |
2246 | in instructions, which is where this routine is always called. */ | |
2247 | if (ep->X_op == O_big | |
2248 | || (ep->X_add_symbol | |
2249 | && (walk_no_bignums (ep->X_add_symbol) | |
2250 | || (ep->X_op_symbol | |
2251 | && walk_no_bignums (ep->X_op_symbol))))) | |
2252 | { | |
2253 | inst.error = _("Invalid constant"); | |
2254 | *str = input_line_pointer; | |
2255 | input_line_pointer = save_in; | |
2256 | return 1; | |
2257 | } | |
2258 | ||
2259 | *str = input_line_pointer; | |
2260 | input_line_pointer = save_in; | |
2261 | return 0; | |
2262 | } | |
2263 | ||
2264 | /* unrestrict should be one if <shift> <register> is permitted for this | |
2265 | instruction */ | |
2266 | ||
2267 | static int | |
2268 | decode_shift (str, unrestrict) | |
2269 | char ** str; | |
2270 | int unrestrict; | |
2271 | { | |
2272 | struct asm_shift * shft; | |
2273 | char * p; | |
2274 | char c; | |
2275 | ||
ae5ad4ad | 2276 | skip_whitespace (* str); |
252b5132 RH |
2277 | |
2278 | for (p = *str; isalpha (*p); p++) | |
2279 | ; | |
2280 | ||
2281 | if (p == *str) | |
2282 | { | |
2283 | inst.error = _("Shift expression expected"); | |
2284 | return FAIL; | |
2285 | } | |
2286 | ||
2287 | c = *p; | |
2288 | *p = '\0'; | |
2289 | shft = (struct asm_shift *) hash_find (arm_shift_hsh, *str); | |
2290 | *p = c; | |
2291 | if (shft) | |
2292 | { | |
2293 | if (!strncmp (*str, "rrx", 3) | |
2294 | || !strncmp (*str, "RRX", 3)) | |
2295 | { | |
2296 | *str = p; | |
2297 | inst.instruction |= shft->value; | |
2298 | return SUCCESS; | |
2299 | } | |
2300 | ||
ae5ad4ad NC |
2301 | skip_whitespace (p); |
2302 | ||
252b5132 RH |
2303 | if (unrestrict && reg_required_here (&p, 8) != FAIL) |
2304 | { | |
2305 | inst.instruction |= shft->value | SHIFT_BY_REG; | |
2306 | *str = p; | |
2307 | return SUCCESS; | |
2308 | } | |
2309 | else if (is_immediate_prefix (* p)) | |
2310 | { | |
2311 | inst.error = NULL; | |
2312 | p++; | |
2313 | if (my_get_expression (&inst.reloc.exp, &p)) | |
2314 | return FAIL; | |
2315 | ||
2316 | /* Validate some simple #expressions */ | |
2317 | if (inst.reloc.exp.X_op == O_constant) | |
2318 | { | |
2319 | unsigned num = inst.reloc.exp.X_add_number; | |
2320 | ||
2321 | /* Reject operations greater than 32, or lsl #32 */ | |
2322 | if (num > 32 || (num == 32 && shft->value == 0)) | |
2323 | { | |
2324 | inst.error = _("Invalid immediate shift"); | |
2325 | return FAIL; | |
2326 | } | |
2327 | ||
2328 | /* Shifts of zero should be converted to lsl (which is zero)*/ | |
2329 | if (num == 0) | |
2330 | { | |
2331 | *str = p; | |
2332 | return SUCCESS; | |
2333 | } | |
2334 | ||
2335 | /* Shifts of 32 are encoded as 0, for those shifts that | |
2336 | support it. */ | |
2337 | if (num == 32) | |
2338 | num = 0; | |
2339 | ||
2340 | inst.instruction |= (num << 7) | shft->value; | |
2341 | *str = p; | |
2342 | return SUCCESS; | |
2343 | } | |
2344 | ||
2345 | inst.reloc.type = BFD_RELOC_ARM_SHIFT_IMM; | |
2346 | inst.reloc.pc_rel = 0; | |
2347 | inst.instruction |= shft->value; | |
2348 | *str = p; | |
2349 | return SUCCESS; | |
2350 | } | |
2351 | else | |
2352 | { | |
2353 | inst.error = unrestrict ? _("shift requires register or #expression") | |
2354 | : _("shift requires #expression"); | |
2355 | *str = p; | |
2356 | return FAIL; | |
2357 | } | |
2358 | } | |
2359 | ||
2360 | inst.error = _("Shift expression expected"); | |
2361 | return FAIL; | |
2362 | } | |
2363 | ||
2364 | /* Do those data_ops which can take a negative immediate constant */ | |
2365 | /* by altering the instuction. A bit of a hack really */ | |
2366 | /* MOV <-> MVN | |
2367 | AND <-> BIC | |
2368 | ADC <-> SBC | |
2369 | by inverting the second operand, and | |
2370 | ADD <-> SUB | |
2371 | CMP <-> CMN | |
2372 | by negating the second operand. | |
2373 | */ | |
2374 | static int | |
2375 | negate_data_op (instruction, value) | |
2376 | unsigned long * instruction; | |
2377 | unsigned long value; | |
2378 | { | |
2379 | int op, new_inst; | |
2380 | unsigned long negated, inverted; | |
2381 | ||
2382 | negated = validate_immediate (-value); | |
2383 | inverted = validate_immediate (~value); | |
2384 | ||
2385 | op = (*instruction >> DATA_OP_SHIFT) & 0xf; | |
2386 | switch (op) | |
2387 | { | |
2388 | /* First negates */ | |
2389 | case OPCODE_SUB: /* ADD <-> SUB */ | |
2390 | new_inst = OPCODE_ADD; | |
2391 | value = negated; | |
2392 | break; | |
2393 | ||
2394 | case OPCODE_ADD: | |
2395 | new_inst = OPCODE_SUB; | |
2396 | value = negated; | |
2397 | break; | |
2398 | ||
2399 | case OPCODE_CMP: /* CMP <-> CMN */ | |
2400 | new_inst = OPCODE_CMN; | |
2401 | value = negated; | |
2402 | break; | |
2403 | ||
2404 | case OPCODE_CMN: | |
2405 | new_inst = OPCODE_CMP; | |
2406 | value = negated; | |
2407 | break; | |
2408 | ||
2409 | /* Now Inverted ops */ | |
2410 | case OPCODE_MOV: /* MOV <-> MVN */ | |
2411 | new_inst = OPCODE_MVN; | |
2412 | value = inverted; | |
2413 | break; | |
2414 | ||
2415 | case OPCODE_MVN: | |
2416 | new_inst = OPCODE_MOV; | |
2417 | value = inverted; | |
2418 | break; | |
2419 | ||
2420 | case OPCODE_AND: /* AND <-> BIC */ | |
2421 | new_inst = OPCODE_BIC; | |
2422 | value = inverted; | |
2423 | break; | |
2424 | ||
2425 | case OPCODE_BIC: | |
2426 | new_inst = OPCODE_AND; | |
2427 | value = inverted; | |
2428 | break; | |
2429 | ||
2430 | case OPCODE_ADC: /* ADC <-> SBC */ | |
2431 | new_inst = OPCODE_SBC; | |
2432 | value = inverted; | |
2433 | break; | |
2434 | ||
2435 | case OPCODE_SBC: | |
2436 | new_inst = OPCODE_ADC; | |
2437 | value = inverted; | |
2438 | break; | |
2439 | ||
2440 | /* We cannot do anything */ | |
2441 | default: | |
2442 | return FAIL; | |
2443 | } | |
2444 | ||
2445 | if (value == FAIL) | |
2446 | return FAIL; | |
2447 | ||
2448 | *instruction &= OPCODE_MASK; | |
2449 | *instruction |= new_inst << DATA_OP_SHIFT; | |
2450 | return value; | |
2451 | } | |
2452 | ||
2453 | static int | |
2454 | data_op2 (str) | |
2455 | char ** str; | |
2456 | { | |
2457 | int value; | |
2458 | expressionS expr; | |
2459 | ||
ae5ad4ad | 2460 | skip_whitespace (* str); |
252b5132 RH |
2461 | |
2462 | if (reg_required_here (str, 0) != FAIL) | |
2463 | { | |
2464 | if (skip_past_comma (str) == SUCCESS) | |
ae5ad4ad NC |
2465 | /* Shift operation on register. */ |
2466 | return decode_shift (str, NO_SHIFT_RESTRICT); | |
2467 | ||
252b5132 RH |
2468 | return SUCCESS; |
2469 | } | |
2470 | else | |
2471 | { | |
2472 | /* Immediate expression */ | |
2473 | if (is_immediate_prefix (**str)) | |
2474 | { | |
2475 | (*str)++; | |
2476 | inst.error = NULL; | |
ae5ad4ad | 2477 | |
252b5132 RH |
2478 | if (my_get_expression (&inst.reloc.exp, str)) |
2479 | return FAIL; | |
2480 | ||
2481 | if (inst.reloc.exp.X_add_symbol) | |
2482 | { | |
2483 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
2484 | inst.reloc.pc_rel = 0; | |
2485 | } | |
2486 | else | |
2487 | { | |
2488 | if (skip_past_comma (str) == SUCCESS) | |
2489 | { | |
2490 | /* #x, y -- ie explicit rotation by Y */ | |
2491 | if (my_get_expression (&expr, str)) | |
2492 | return FAIL; | |
2493 | ||
2494 | if (expr.X_op != O_constant) | |
2495 | { | |
2496 | inst.error = _("Constant expression expected"); | |
2497 | return FAIL; | |
2498 | } | |
2499 | ||
2500 | /* Rotate must be a multiple of 2 */ | |
2501 | if (((unsigned) expr.X_add_number) > 30 | |
2502 | || (expr.X_add_number & 1) != 0 | |
2503 | || ((unsigned) inst.reloc.exp.X_add_number) > 255) | |
2504 | { | |
2505 | inst.error = _("Invalid constant"); | |
2506 | return FAIL; | |
2507 | } | |
2508 | inst.instruction |= INST_IMMEDIATE; | |
2509 | inst.instruction |= inst.reloc.exp.X_add_number; | |
2510 | inst.instruction |= expr.X_add_number << 7; | |
2511 | return SUCCESS; | |
2512 | } | |
2513 | ||
2514 | /* Implicit rotation, select a suitable one */ | |
2515 | value = validate_immediate (inst.reloc.exp.X_add_number); | |
2516 | ||
2517 | if (value == FAIL) | |
2518 | { | |
2519 | /* Can't be done, perhaps the code reads something like | |
2520 | "add Rd, Rn, #-n", where "sub Rd, Rn, #n" would be ok */ | |
2521 | if ((value = negate_data_op (&inst.instruction, | |
2522 | inst.reloc.exp.X_add_number)) | |
2523 | == FAIL) | |
2524 | { | |
2525 | inst.error = _("Invalid constant"); | |
2526 | return FAIL; | |
2527 | } | |
2528 | } | |
2529 | ||
2530 | inst.instruction |= value; | |
2531 | } | |
2532 | ||
2533 | inst.instruction |= INST_IMMEDIATE; | |
2534 | return SUCCESS; | |
2535 | } | |
2536 | ||
2537 | (*str)++; | |
2538 | inst.error = _("Register or shift expression expected"); | |
2539 | return FAIL; | |
2540 | } | |
2541 | } | |
2542 | ||
2543 | static int | |
2544 | fp_op2 (str) | |
2545 | char ** str; | |
2546 | { | |
ae5ad4ad | 2547 | skip_whitespace (* str); |
252b5132 RH |
2548 | |
2549 | if (fp_reg_required_here (str, 0) != FAIL) | |
2550 | return SUCCESS; | |
2551 | else | |
2552 | { | |
2553 | /* Immediate expression */ | |
2554 | if (*((*str)++) == '#') | |
2555 | { | |
2556 | int i; | |
2557 | ||
2558 | inst.error = NULL; | |
276b1dc2 | 2559 | |
ae5ad4ad | 2560 | skip_whitespace (* str); |
252b5132 RH |
2561 | |
2562 | /* First try and match exact strings, this is to guarantee that | |
2563 | some formats will work even for cross assembly */ | |
2564 | ||
2565 | for (i = 0; fp_const[i]; i++) | |
2566 | { | |
2567 | if (strncmp (*str, fp_const[i], strlen (fp_const[i])) == 0) | |
2568 | { | |
2569 | char *start = *str; | |
2570 | ||
2571 | *str += strlen (fp_const[i]); | |
2572 | if (is_end_of_line[(int)**str] || **str == '\0') | |
2573 | { | |
2574 | inst.instruction |= i + 8; | |
2575 | return SUCCESS; | |
2576 | } | |
2577 | *str = start; | |
2578 | } | |
2579 | } | |
2580 | ||
2581 | /* Just because we didn't get a match doesn't mean that the | |
2582 | constant isn't valid, just that it is in a format that we | |
2583 | don't automatically recognize. Try parsing it with | |
2584 | the standard expression routines. */ | |
2585 | if ((i = my_get_float_expression (str)) >= 0) | |
2586 | { | |
2587 | inst.instruction |= i + 8; | |
2588 | return SUCCESS; | |
2589 | } | |
2590 | ||
2591 | inst.error = _("Invalid floating point immediate expression"); | |
2592 | return FAIL; | |
2593 | } | |
2594 | inst.error = _("Floating point register or immediate expression expected"); | |
2595 | return FAIL; | |
2596 | } | |
2597 | } | |
2598 | ||
2599 | static void | |
2600 | do_arit (str, flags) | |
2601 | char * str; | |
2602 | unsigned long flags; | |
2603 | { | |
ae5ad4ad | 2604 | skip_whitespace (str); |
252b5132 RH |
2605 | |
2606 | if (reg_required_here (&str, 12) == FAIL | |
2607 | || skip_past_comma (&str) == FAIL | |
2608 | || reg_required_here (&str, 16) == FAIL | |
2609 | || skip_past_comma (&str) == FAIL | |
2610 | || data_op2 (&str) == FAIL) | |
2611 | { | |
2612 | if (!inst.error) | |
90ca882f | 2613 | inst.error = BAD_ARGS; |
252b5132 RH |
2614 | return; |
2615 | } | |
2616 | ||
2617 | inst.instruction |= flags; | |
2618 | end_of_line (str); | |
2619 | return; | |
2620 | } | |
2621 | ||
2622 | static void | |
2623 | do_adr (str, flags) | |
2624 | char * str; | |
2625 | unsigned long flags; | |
2626 | { | |
2627 | /* This is a pseudo-op of the form "adr rd, label" to be converted | |
2628 | into a relative address of the form "add rd, pc, #label-.-8" */ | |
2629 | ||
ae5ad4ad | 2630 | skip_whitespace (str); |
252b5132 RH |
2631 | |
2632 | if (reg_required_here (&str, 12) == FAIL | |
2633 | || skip_past_comma (&str) == FAIL | |
2634 | || my_get_expression (&inst.reloc.exp, &str)) | |
2635 | { | |
2636 | if (!inst.error) | |
90ca882f | 2637 | inst.error = BAD_ARGS; |
252b5132 RH |
2638 | return; |
2639 | } | |
2640 | /* Frag hacking will turn this into a sub instruction if the offset turns | |
2641 | out to be negative. */ | |
2642 | inst.reloc.type = BFD_RELOC_ARM_IMMEDIATE; | |
2643 | inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */ | |
2644 | inst.reloc.pc_rel = 1; | |
2645 | inst.instruction |= flags; | |
2646 | end_of_line (str); | |
2647 | return; | |
2648 | } | |
2649 | ||
49a5575c NC |
2650 | static void |
2651 | do_adrl (str, flags) | |
2652 | char * str; | |
2653 | unsigned long flags; | |
2654 | { | |
2655 | /* This is a pseudo-op of the form "adrl rd, label" to be converted | |
2656 | into a relative address of the form: | |
2657 | add rd, pc, #low(label-.-8)" | |
2658 | add rd, rd, #high(label-.-8)" */ | |
2659 | ||
ae5ad4ad | 2660 | skip_whitespace (str); |
49a5575c NC |
2661 | |
2662 | if (reg_required_here (& str, 12) == FAIL | |
2663 | || skip_past_comma (& str) == FAIL | |
2664 | || my_get_expression (& inst.reloc.exp, & str)) | |
2665 | { | |
2666 | if (!inst.error) | |
90ca882f | 2667 | inst.error = BAD_ARGS; |
49a5575c NC |
2668 | return; |
2669 | } | |
2670 | ||
2671 | end_of_line (str); | |
2672 | ||
2673 | /* Frag hacking will turn this into a sub instruction if the offset turns | |
2674 | out to be negative. */ | |
2675 | inst.reloc.type = BFD_RELOC_ARM_ADRL_IMMEDIATE; | |
2676 | inst.reloc.exp.X_add_number -= 8; /* PC relative adjust */ | |
2677 | inst.reloc.pc_rel = 1; | |
2678 | inst.instruction |= flags; | |
2679 | inst.size = INSN_SIZE * 2; | |
2680 | ||
2681 | return; | |
2682 | } | |
2683 | ||
252b5132 RH |
2684 | static void |
2685 | do_cmp (str, flags) | |
2686 | char * str; | |
2687 | unsigned long flags; | |
2688 | { | |
ae5ad4ad | 2689 | skip_whitespace (str); |
252b5132 RH |
2690 | |
2691 | if (reg_required_here (&str, 16) == FAIL) | |
2692 | { | |
2693 | if (!inst.error) | |
90ca882f | 2694 | inst.error = BAD_ARGS; |
252b5132 RH |
2695 | return; |
2696 | } | |
2697 | ||
2698 | if (skip_past_comma (&str) == FAIL | |
2699 | || data_op2 (&str) == FAIL) | |
2700 | { | |
2701 | if (!inst.error) | |
90ca882f | 2702 | inst.error = BAD_ARGS; |
252b5132 RH |
2703 | return; |
2704 | } | |
2705 | ||
2706 | inst.instruction |= flags; | |
2707 | if ((flags & 0x0000f000) == 0) | |
2708 | inst.instruction |= CONDS_BIT; | |
2709 | ||
2710 | end_of_line (str); | |
2711 | return; | |
2712 | } | |
2713 | ||
2714 | static void | |
2715 | do_mov (str, flags) | |
2716 | char * str; | |
2717 | unsigned long flags; | |
2718 | { | |
ae5ad4ad | 2719 | skip_whitespace (str); |
252b5132 RH |
2720 | |
2721 | if (reg_required_here (&str, 12) == FAIL) | |
2722 | { | |
2723 | if (!inst.error) | |
90ca882f | 2724 | inst.error = BAD_ARGS; |
252b5132 RH |
2725 | return; |
2726 | } | |
2727 | ||
2728 | if (skip_past_comma (&str) == FAIL | |
2729 | || data_op2 (&str) == FAIL) | |
2730 | { | |
2731 | if (!inst.error) | |
90ca882f | 2732 | inst.error = BAD_ARGS; |
252b5132 RH |
2733 | return; |
2734 | } | |
2735 | ||
2736 | inst.instruction |= flags; | |
2737 | end_of_line (str); | |
2738 | return; | |
2739 | } | |
2740 | ||
2741 | static int | |
2742 | ldst_extend (str, hwse) | |
2743 | char ** str; | |
2744 | int hwse; | |
2745 | { | |
2746 | int add = INDEX_UP; | |
2747 | ||
2748 | switch (**str) | |
2749 | { | |
2750 | case '#': | |
2751 | case '$': | |
2752 | (*str)++; | |
2753 | if (my_get_expression (& inst.reloc.exp, str)) | |
2754 | return FAIL; | |
2755 | ||
2756 | if (inst.reloc.exp.X_op == O_constant) | |
2757 | { | |
2758 | int value = inst.reloc.exp.X_add_number; | |
2759 | ||
2760 | if ((hwse && (value < -255 || value > 255)) | |
2761 | || (value < -4095 || value > 4095)) | |
2762 | { | |
2763 | inst.error = _("address offset too large"); | |
2764 | return FAIL; | |
2765 | } | |
2766 | ||
2767 | if (value < 0) | |
2768 | { | |
2769 | value = -value; | |
2770 | add = 0; | |
2771 | } | |
2772 | ||
2773 | /* Halfword and signextension instructions have the | |
2774 | immediate value split across bits 11..8 and bits 3..0 */ | |
2775 | if (hwse) | |
3d103319 | 2776 | inst.instruction |= add | HWOFFSET_IMM | ((value >> 4) << 8) | (value & 0xF); |
252b5132 RH |
2777 | else |
2778 | inst.instruction |= add | value; | |
2779 | } | |
2780 | else | |
2781 | { | |
2782 | if (hwse) | |
2783 | { | |
2784 | inst.instruction |= HWOFFSET_IMM; | |
2785 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; | |
2786 | } | |
2787 | else | |
2788 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; | |
2789 | inst.reloc.pc_rel = 0; | |
2790 | } | |
2791 | return SUCCESS; | |
2792 | ||
2793 | case '-': | |
2794 | add = 0; /* and fall through */ | |
2795 | case '+': | |
2796 | (*str)++; /* and fall through */ | |
2797 | default: | |
2798 | if (reg_required_here (str, 0) == FAIL) | |
2799 | return FAIL; | |
2800 | ||
2801 | if (hwse) | |
2802 | inst.instruction |= add; | |
2803 | else | |
2804 | { | |
2805 | inst.instruction |= add | OFFSET_REG; | |
2806 | if (skip_past_comma (str) == SUCCESS) | |
2807 | return decode_shift (str, SHIFT_RESTRICT); | |
2808 | } | |
2809 | ||
2810 | return SUCCESS; | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | static void | |
2815 | do_ldst (str, flags) | |
2816 | char * str; | |
2817 | unsigned long flags; | |
2818 | { | |
2819 | int halfword = 0; | |
2820 | int pre_inc = 0; | |
2821 | int conflict_reg; | |
2822 | int value; | |
2823 | ||
2824 | /* This is not ideal, but it is the simplest way of dealing with the | |
2825 | ARM7T halfword instructions (since they use a different | |
2826 | encoding, but the same mnemonic): */ | |
3d103319 ILT |
2827 | halfword = (flags & 0x80000000) != 0; |
2828 | if (halfword) | |
252b5132 RH |
2829 | { |
2830 | /* This is actually a load/store of a halfword, or a | |
2831 | signed-extension load */ | |
2832 | if ((cpu_variant & ARM_HALFWORD) == 0) | |
2833 | { | |
2834 | inst.error | |
2835 | = _("Processor does not support halfwords or signed bytes"); | |
2836 | return; | |
2837 | } | |
2838 | ||
2839 | inst.instruction = (inst.instruction & COND_MASK) | |
2840 | | (flags & ~COND_MASK); | |
2841 | ||
2842 | flags = 0; | |
2843 | } | |
2844 | ||
ae5ad4ad | 2845 | skip_whitespace (str); |
252b5132 RH |
2846 | |
2847 | if ((conflict_reg = reg_required_here (& str, 12)) == FAIL) | |
2848 | { | |
2849 | if (!inst.error) | |
90ca882f | 2850 | inst.error = BAD_ARGS; |
252b5132 RH |
2851 | return; |
2852 | } | |
2853 | ||
2854 | if (skip_past_comma (& str) == FAIL) | |
2855 | { | |
2856 | inst.error = _("Address expected"); | |
2857 | return; | |
2858 | } | |
2859 | ||
2860 | if (*str == '[') | |
2861 | { | |
2862 | int reg; | |
2863 | ||
2864 | str++; | |
276b1dc2 | 2865 | |
ae5ad4ad | 2866 | skip_whitespace (str); |
252b5132 RH |
2867 | |
2868 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
2869 | return; | |
2870 | ||
11450271 NC |
2871 | /* Conflicts can occur on stores as well as loads. */ |
2872 | conflict_reg = (conflict_reg == reg); | |
252b5132 | 2873 | |
ae5ad4ad | 2874 | skip_whitespace (str); |
252b5132 RH |
2875 | |
2876 | if (*str == ']') | |
2877 | { | |
11450271 NC |
2878 | str ++; |
2879 | ||
252b5132 RH |
2880 | if (skip_past_comma (&str) == SUCCESS) |
2881 | { | |
2882 | /* [Rn],... (post inc) */ | |
2883 | if (ldst_extend (&str, halfword) == FAIL) | |
2884 | return; | |
2885 | if (conflict_reg) | |
11450271 NC |
2886 | as_warn (_("%s register same as write-back base"), |
2887 | (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); | |
252b5132 RH |
2888 | } |
2889 | else | |
2890 | { | |
2891 | /* [Rn] */ | |
2892 | if (halfword) | |
2893 | inst.instruction |= HWOFFSET_IMM; | |
2894 | ||
ae5ad4ad | 2895 | skip_whitespace (str); |
252b5132 RH |
2896 | |
2897 | if (*str == '!') | |
2898 | { | |
2899 | if (conflict_reg) | |
11450271 NC |
2900 | as_warn (_("%s register same as write-back base"), |
2901 | (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); | |
252b5132 RH |
2902 | str++; |
2903 | inst.instruction |= WRITE_BACK; | |
2904 | } | |
2905 | ||
2906 | flags |= INDEX_UP; | |
2907 | if (! (flags & TRANS_BIT)) | |
2908 | pre_inc = 1; | |
2909 | } | |
2910 | } | |
2911 | else | |
2912 | { | |
2913 | /* [Rn,...] */ | |
2914 | if (skip_past_comma (&str) == FAIL) | |
2915 | { | |
2916 | inst.error = _("pre-indexed expression expected"); | |
2917 | return; | |
2918 | } | |
2919 | ||
2920 | pre_inc = 1; | |
2921 | if (ldst_extend (&str, halfword) == FAIL) | |
2922 | return; | |
2923 | ||
ae5ad4ad | 2924 | skip_whitespace (str); |
252b5132 RH |
2925 | |
2926 | if (*str++ != ']') | |
2927 | { | |
2928 | inst.error = _("missing ]"); | |
2929 | return; | |
2930 | } | |
2931 | ||
ae5ad4ad | 2932 | skip_whitespace (str); |
252b5132 RH |
2933 | |
2934 | if (*str == '!') | |
2935 | { | |
2936 | if (conflict_reg) | |
11450271 NC |
2937 | as_warn (_("%s register same as write-back base"), |
2938 | (inst.instruction & LOAD_BIT) ? _("destination") : _("source") ); | |
252b5132 RH |
2939 | str++; |
2940 | inst.instruction |= WRITE_BACK; | |
2941 | } | |
2942 | } | |
2943 | } | |
2944 | else if (*str == '=') | |
2945 | { | |
2946 | /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ | |
2947 | str++; | |
2948 | ||
ae5ad4ad | 2949 | skip_whitespace (str); |
252b5132 RH |
2950 | |
2951 | if (my_get_expression (&inst.reloc.exp, &str)) | |
2952 | return; | |
2953 | ||
2954 | if (inst.reloc.exp.X_op != O_constant | |
2955 | && inst.reloc.exp.X_op != O_symbol) | |
2956 | { | |
2957 | inst.error = _("Constant expression expected"); | |
2958 | return; | |
2959 | } | |
2960 | ||
2961 | if (inst.reloc.exp.X_op == O_constant | |
2962 | && (value = validate_immediate(inst.reloc.exp.X_add_number)) != FAIL) | |
2963 | { | |
2964 | /* This can be done with a mov instruction */ | |
2965 | inst.instruction &= LITERAL_MASK; | |
2966 | inst.instruction |= INST_IMMEDIATE | (OPCODE_MOV << DATA_OP_SHIFT); | |
2967 | inst.instruction |= (flags & COND_MASK) | (value & 0xfff); | |
2968 | end_of_line(str); | |
2969 | return; | |
2970 | } | |
2971 | else | |
2972 | { | |
2973 | /* Insert into literal pool */ | |
2974 | if (add_to_lit_pool () == FAIL) | |
2975 | { | |
2976 | if (!inst.error) | |
2977 | inst.error = _("literal pool insertion failed"); | |
2978 | return; | |
2979 | } | |
2980 | ||
2981 | /* Change the instruction exp to point to the pool */ | |
2982 | if (halfword) | |
2983 | { | |
2984 | inst.instruction |= HWOFFSET_IMM; | |
2985 | inst.reloc.type = BFD_RELOC_ARM_HWLITERAL; | |
2986 | } | |
2987 | else | |
2988 | inst.reloc.type = BFD_RELOC_ARM_LITERAL; | |
2989 | inst.reloc.pc_rel = 1; | |
2990 | inst.instruction |= (REG_PC << 16); | |
2991 | pre_inc = 1; | |
2992 | } | |
2993 | } | |
2994 | else | |
2995 | { | |
2996 | if (my_get_expression (&inst.reloc.exp, &str)) | |
2997 | return; | |
2998 | ||
2999 | if (halfword) | |
3000 | { | |
3001 | inst.instruction |= HWOFFSET_IMM; | |
3002 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM8; | |
3003 | } | |
3004 | else | |
3005 | inst.reloc.type = BFD_RELOC_ARM_OFFSET_IMM; | |
3006 | inst.reloc.exp.X_add_number -= 8; /* PC rel adjust */ | |
3007 | inst.reloc.pc_rel = 1; | |
3008 | inst.instruction |= (REG_PC << 16); | |
3009 | pre_inc = 1; | |
3010 | } | |
3011 | ||
3012 | if (pre_inc && (flags & TRANS_BIT)) | |
3013 | inst.error = _("Pre-increment instruction with translate"); | |
3014 | ||
3015 | inst.instruction |= flags | (pre_inc ? PRE_INDEX : 0); | |
3016 | end_of_line (str); | |
3017 | return; | |
3018 | } | |
3019 | ||
3020 | static long | |
3021 | reg_list (strp) | |
3022 | char ** strp; | |
3023 | { | |
3024 | char * str = *strp; | |
3025 | long range = 0; | |
3026 | int another_range; | |
3027 | ||
3028 | /* We come back here if we get ranges concatenated by '+' or '|' */ | |
3029 | do | |
3030 | { | |
3031 | another_range = 0; | |
3032 | ||
3033 | if (*str == '{') | |
3034 | { | |
3035 | int in_range = 0; | |
3036 | int cur_reg = -1; | |
3037 | ||
3038 | str++; | |
3039 | do | |
3040 | { | |
3041 | int reg; | |
3042 | ||
ae5ad4ad | 3043 | skip_whitespace (str); |
252b5132 RH |
3044 | |
3045 | if ((reg = reg_required_here (& str, -1)) == FAIL) | |
3046 | return FAIL; | |
3047 | ||
3048 | if (in_range) | |
3049 | { | |
3050 | int i; | |
3051 | ||
3052 | if (reg <= cur_reg) | |
3053 | { | |
3054 | inst.error = _("Bad range in register list"); | |
3055 | return FAIL; | |
3056 | } | |
3057 | ||
3058 | for (i = cur_reg + 1; i < reg; i++) | |
3059 | { | |
3060 | if (range & (1 << i)) | |
3061 | as_tsktsk | |
3062 | (_("Warning: Duplicated register (r%d) in register list"), | |
3063 | i); | |
3064 | else | |
3065 | range |= 1 << i; | |
3066 | } | |
3067 | in_range = 0; | |
3068 | } | |
3069 | ||
3070 | if (range & (1 << reg)) | |
3071 | as_tsktsk (_("Warning: Duplicated register (r%d) in register list"), | |
3072 | reg); | |
3073 | else if (reg <= cur_reg) | |
3074 | as_tsktsk (_("Warning: Register range not in ascending order")); | |
3075 | ||
3076 | range |= 1 << reg; | |
3077 | cur_reg = reg; | |
3078 | } while (skip_past_comma (&str) != FAIL | |
3079 | || (in_range = 1, *str++ == '-')); | |
3080 | str--; | |
ae5ad4ad | 3081 | skip_whitespace (str); |
252b5132 RH |
3082 | |
3083 | if (*str++ != '}') | |
3084 | { | |
3085 | inst.error = _("Missing `}'"); | |
3086 | return FAIL; | |
3087 | } | |
3088 | } | |
3089 | else | |
3090 | { | |
3091 | expressionS expr; | |
3092 | ||
3093 | if (my_get_expression (&expr, &str)) | |
3094 | return FAIL; | |
3095 | ||
3096 | if (expr.X_op == O_constant) | |
3097 | { | |
3098 | if (expr.X_add_number | |
3099 | != (expr.X_add_number & 0x0000ffff)) | |
3100 | { | |
3101 | inst.error = _("invalid register mask"); | |
3102 | return FAIL; | |
3103 | } | |
3104 | ||
3105 | if ((range & expr.X_add_number) != 0) | |
3106 | { | |
3107 | int regno = range & expr.X_add_number; | |
3108 | ||
3109 | regno &= -regno; | |
3110 | regno = (1 << regno) - 1; | |
3111 | as_tsktsk | |
3112 | (_("Warning: Duplicated register (r%d) in register list"), | |
3113 | regno); | |
3114 | } | |
3115 | ||
3116 | range |= expr.X_add_number; | |
3117 | } | |
3118 | else | |
3119 | { | |
3120 | if (inst.reloc.type != 0) | |
3121 | { | |
3122 | inst.error = _("expression too complex"); | |
3123 | return FAIL; | |
3124 | } | |
3125 | ||
3126 | memcpy (&inst.reloc.exp, &expr, sizeof (expressionS)); | |
3127 | inst.reloc.type = BFD_RELOC_ARM_MULTI; | |
3128 | inst.reloc.pc_rel = 0; | |
3129 | } | |
3130 | } | |
3131 | ||
ae5ad4ad | 3132 | skip_whitespace (str); |
252b5132 RH |
3133 | |
3134 | if (*str == '|' || *str == '+') | |
3135 | { | |
3136 | str++; | |
3137 | another_range = 1; | |
3138 | } | |
3139 | } while (another_range); | |
3140 | ||
3141 | *strp = str; | |
3142 | return range; | |
3143 | } | |
3144 | ||
3145 | static void | |
3146 | do_ldmstm (str, flags) | |
3147 | char * str; | |
3148 | unsigned long flags; | |
3149 | { | |
3150 | int base_reg; | |
3151 | long range; | |
3152 | ||
ae5ad4ad | 3153 | skip_whitespace (str); |
252b5132 RH |
3154 | |
3155 | if ((base_reg = reg_required_here (&str, 16)) == FAIL) | |
3156 | return; | |
3157 | ||
3158 | if (base_reg == REG_PC) | |
3159 | { | |
3160 | inst.error = _("r15 not allowed as base register"); | |
3161 | return; | |
3162 | } | |
3163 | ||
ae5ad4ad NC |
3164 | skip_whitespace (str); |
3165 | ||
252b5132 RH |
3166 | if (*str == '!') |
3167 | { | |
3168 | flags |= WRITE_BACK; | |
3169 | str++; | |
3170 | } | |
3171 | ||
3172 | if (skip_past_comma (&str) == FAIL | |
3173 | || (range = reg_list (&str)) == FAIL) | |
3174 | { | |
3175 | if (! inst.error) | |
90ca882f | 3176 | inst.error = BAD_ARGS; |
252b5132 RH |
3177 | return; |
3178 | } | |
3179 | ||
3180 | if (*str == '^') | |
3181 | { | |
3182 | str++; | |
913f265c | 3183 | flags |= LDM_TYPE_2_OR_3; |
252b5132 RH |
3184 | } |
3185 | ||
3186 | inst.instruction |= flags | range; | |
3187 | end_of_line (str); | |
3188 | return; | |
3189 | } | |
3190 | ||
3191 | static void | |
3192 | do_swi (str, flags) | |
3193 | char * str; | |
3194 | unsigned long flags; | |
3195 | { | |
ae5ad4ad | 3196 | skip_whitespace (str); |
252b5132 RH |
3197 | |
3198 | /* Allow optional leading '#'. */ | |
3199 | if (is_immediate_prefix (*str)) | |
3200 | str++; | |
3201 | ||
3202 | if (my_get_expression (& inst.reloc.exp, & str)) | |
3203 | return; | |
3204 | ||
3205 | inst.reloc.type = BFD_RELOC_ARM_SWI; | |
3206 | inst.reloc.pc_rel = 0; | |
3207 | inst.instruction |= flags; | |
3208 | ||
3209 | end_of_line (str); | |
3210 | ||
3211 | return; | |
3212 | } | |
3213 | ||
3214 | static void | |
3215 | do_swap (str, flags) | |
3216 | char * str; | |
3217 | unsigned long flags; | |
3218 | { | |
3219 | int reg; | |
3220 | ||
ae5ad4ad | 3221 | skip_whitespace (str); |
252b5132 RH |
3222 | |
3223 | if ((reg = reg_required_here (&str, 12)) == FAIL) | |
3224 | return; | |
3225 | ||
3226 | if (reg == REG_PC) | |
3227 | { | |
3228 | inst.error = _("r15 not allowed in swap"); | |
3229 | return; | |
3230 | } | |
3231 | ||
3232 | if (skip_past_comma (&str) == FAIL | |
3233 | || (reg = reg_required_here (&str, 0)) == FAIL) | |
3234 | { | |
3235 | if (!inst.error) | |
90ca882f | 3236 | inst.error = BAD_ARGS; |
252b5132 RH |
3237 | return; |
3238 | } | |
3239 | ||
3240 | if (reg == REG_PC) | |
3241 | { | |
3242 | inst.error = _("r15 not allowed in swap"); | |
3243 | return; | |
3244 | } | |
3245 | ||
3246 | if (skip_past_comma (&str) == FAIL | |
3247 | || *str++ != '[') | |
3248 | { | |
90ca882f | 3249 | inst.error = BAD_ARGS; |
252b5132 RH |
3250 | return; |
3251 | } | |
3252 | ||
ae5ad4ad | 3253 | skip_whitespace (str); |
252b5132 RH |
3254 | |
3255 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
3256 | return; | |
3257 | ||
3258 | if (reg == REG_PC) | |
3259 | { | |
90ca882f | 3260 | inst.error = BAD_PC; |
252b5132 RH |
3261 | return; |
3262 | } | |
3263 | ||
ae5ad4ad | 3264 | skip_whitespace (str); |
252b5132 RH |
3265 | |
3266 | if (*str++ != ']') | |
3267 | { | |
3268 | inst.error = _("missing ]"); | |
3269 | return; | |
3270 | } | |
3271 | ||
3272 | inst.instruction |= flags; | |
3273 | end_of_line (str); | |
3274 | return; | |
3275 | } | |
3276 | ||
3277 | static void | |
3278 | do_branch (str, flags) | |
3279 | char * str; | |
3280 | unsigned long flags; | |
3281 | { | |
3282 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3283 | return; | |
3284 | ||
3285 | #ifdef OBJ_ELF | |
3286 | { | |
3287 | char * save_in; | |
3288 | ||
3289 | /* ScottB: February 5, 1998 */ | |
3290 | /* Check to see of PLT32 reloc required for the instruction. */ | |
3291 | ||
3292 | /* arm_parse_reloc() works on input_line_pointer. | |
3293 | We actually want to parse the operands to the branch instruction | |
3294 | passed in 'str'. Save the input pointer and restore it later. */ | |
3295 | save_in = input_line_pointer; | |
3296 | input_line_pointer = str; | |
3297 | if (inst.reloc.exp.X_op == O_symbol | |
3298 | && *str == '(' | |
3299 | && arm_parse_reloc () == BFD_RELOC_ARM_PLT32) | |
3300 | { | |
3301 | inst.reloc.type = BFD_RELOC_ARM_PLT32; | |
3302 | inst.reloc.pc_rel = 0; | |
3303 | /* Modify str to point to after parsed operands, otherwise | |
3304 | end_of_line() will complain about the (PLT) left in str. */ | |
3305 | str = input_line_pointer; | |
3306 | } | |
3307 | else | |
3308 | { | |
3309 | inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; | |
3310 | inst.reloc.pc_rel = 1; | |
3311 | } | |
3312 | input_line_pointer = save_in; | |
3313 | } | |
3314 | #else | |
3315 | inst.reloc.type = BFD_RELOC_ARM_PCREL_BRANCH; | |
3316 | inst.reloc.pc_rel = 1; | |
3317 | #endif /* OBJ_ELF */ | |
3318 | ||
3319 | end_of_line (str); | |
3320 | return; | |
3321 | } | |
3322 | ||
3323 | static void | |
3324 | do_bx (str, flags) | |
3325 | char * str; | |
3326 | unsigned long flags; | |
3327 | { | |
3328 | int reg; | |
3329 | ||
ae5ad4ad | 3330 | skip_whitespace (str); |
252b5132 RH |
3331 | |
3332 | if ((reg = reg_required_here (&str, 0)) == FAIL) | |
92a66162 DL |
3333 | { |
3334 | inst.error = BAD_ARGS; | |
3335 | return; | |
3336 | } | |
252b5132 RH |
3337 | |
3338 | if (reg == REG_PC) | |
92a66162 | 3339 | inst.error = BAD_PC; |
252b5132 RH |
3340 | |
3341 | end_of_line (str); | |
252b5132 RH |
3342 | } |
3343 | ||
3344 | static void | |
3345 | do_cdp (str, flags) | |
3346 | char * str; | |
3347 | unsigned long flags; | |
3348 | { | |
3349 | /* Co-processor data operation. | |
3350 | Format: CDP{cond} CP#,<expr>,CRd,CRn,CRm{,<expr>} */ | |
ae5ad4ad | 3351 | skip_whitespace (str); |
252b5132 RH |
3352 | |
3353 | if (co_proc_number (&str) == FAIL) | |
3354 | { | |
3355 | if (!inst.error) | |
90ca882f | 3356 | inst.error = BAD_ARGS; |
252b5132 RH |
3357 | return; |
3358 | } | |
3359 | ||
3360 | if (skip_past_comma (&str) == FAIL | |
3361 | || cp_opc_expr (&str, 20,4) == FAIL) | |
3362 | { | |
3363 | if (!inst.error) | |
90ca882f | 3364 | inst.error = BAD_ARGS; |
252b5132 RH |
3365 | return; |
3366 | } | |
3367 | ||
3368 | if (skip_past_comma (&str) == FAIL | |
3369 | || cp_reg_required_here (&str, 12) == FAIL) | |
3370 | { | |
3371 | if (!inst.error) | |
90ca882f | 3372 | inst.error = BAD_ARGS; |
252b5132 RH |
3373 | return; |
3374 | } | |
3375 | ||
3376 | if (skip_past_comma (&str) == FAIL | |
3377 | || cp_reg_required_here (&str, 16) == FAIL) | |
3378 | { | |
3379 | if (!inst.error) | |
90ca882f | 3380 | inst.error = BAD_ARGS; |
252b5132 RH |
3381 | return; |
3382 | } | |
3383 | ||
3384 | if (skip_past_comma (&str) == FAIL | |
3385 | || cp_reg_required_here (&str, 0) == FAIL) | |
3386 | { | |
3387 | if (!inst.error) | |
90ca882f | 3388 | inst.error = BAD_ARGS; |
252b5132 RH |
3389 | return; |
3390 | } | |
3391 | ||
3392 | if (skip_past_comma (&str) == SUCCESS) | |
3393 | { | |
3394 | if (cp_opc_expr (&str, 5, 3) == FAIL) | |
3395 | { | |
3396 | if (!inst.error) | |
90ca882f | 3397 | inst.error = BAD_ARGS; |
252b5132 RH |
3398 | return; |
3399 | } | |
3400 | } | |
3401 | ||
3402 | end_of_line (str); | |
3403 | return; | |
3404 | } | |
3405 | ||
3406 | static void | |
3407 | do_lstc (str, flags) | |
3408 | char * str; | |
3409 | unsigned long flags; | |
3410 | { | |
3411 | /* Co-processor register load/store. | |
3412 | Format: <LDC|STC{cond}[L] CP#,CRd,<address> */ | |
3413 | ||
ae5ad4ad | 3414 | skip_whitespace (str); |
252b5132 RH |
3415 | |
3416 | if (co_proc_number (&str) == FAIL) | |
3417 | { | |
3418 | if (!inst.error) | |
90ca882f | 3419 | inst.error = BAD_ARGS; |
252b5132 RH |
3420 | return; |
3421 | } | |
3422 | ||
3423 | if (skip_past_comma (&str) == FAIL | |
3424 | || cp_reg_required_here (&str, 12) == FAIL) | |
3425 | { | |
3426 | if (!inst.error) | |
90ca882f | 3427 | inst.error = BAD_ARGS; |
252b5132 RH |
3428 | return; |
3429 | } | |
3430 | ||
3431 | if (skip_past_comma (&str) == FAIL | |
3432 | || cp_address_required_here (&str) == FAIL) | |
3433 | { | |
3434 | if (! inst.error) | |
90ca882f | 3435 | inst.error = BAD_ARGS; |
252b5132 RH |
3436 | return; |
3437 | } | |
3438 | ||
3439 | inst.instruction |= flags; | |
3440 | end_of_line (str); | |
3441 | return; | |
3442 | } | |
3443 | ||
3444 | static void | |
3445 | do_co_reg (str, flags) | |
3446 | char * str; | |
3447 | unsigned long flags; | |
3448 | { | |
3449 | /* Co-processor register transfer. | |
3450 | Format: <MCR|MRC>{cond} CP#,<expr1>,Rd,CRn,CRm{,<expr2>} */ | |
3451 | ||
ae5ad4ad | 3452 | skip_whitespace (str); |
252b5132 RH |
3453 | |
3454 | if (co_proc_number (&str) == FAIL) | |
3455 | { | |
3456 | if (!inst.error) | |
90ca882f | 3457 | inst.error = BAD_ARGS; |
252b5132 RH |
3458 | return; |
3459 | } | |
3460 | ||
3461 | if (skip_past_comma (&str) == FAIL | |
3462 | || cp_opc_expr (&str, 21, 3) == FAIL) | |
3463 | { | |
3464 | if (!inst.error) | |
90ca882f | 3465 | inst.error = BAD_ARGS; |
252b5132 RH |
3466 | return; |
3467 | } | |
3468 | ||
3469 | if (skip_past_comma (&str) == FAIL | |
3470 | || reg_required_here (&str, 12) == FAIL) | |
3471 | { | |
3472 | if (!inst.error) | |
90ca882f | 3473 | inst.error = BAD_ARGS; |
252b5132 RH |
3474 | return; |
3475 | } | |
3476 | ||
3477 | if (skip_past_comma (&str) == FAIL | |
3478 | || cp_reg_required_here (&str, 16) == FAIL) | |
3479 | { | |
3480 | if (!inst.error) | |
90ca882f | 3481 | inst.error = BAD_ARGS; |
252b5132 RH |
3482 | return; |
3483 | } | |
3484 | ||
3485 | if (skip_past_comma (&str) == FAIL | |
3486 | || cp_reg_required_here (&str, 0) == FAIL) | |
3487 | { | |
3488 | if (!inst.error) | |
90ca882f | 3489 | inst.error = BAD_ARGS; |
252b5132 RH |
3490 | return; |
3491 | } | |
3492 | ||
3493 | if (skip_past_comma (&str) == SUCCESS) | |
3494 | { | |
3495 | if (cp_opc_expr (&str, 5, 3) == FAIL) | |
3496 | { | |
3497 | if (!inst.error) | |
90ca882f | 3498 | inst.error = BAD_ARGS; |
252b5132 RH |
3499 | return; |
3500 | } | |
3501 | } | |
92a66162 DL |
3502 | if (flags) |
3503 | { | |
3504 | inst.error = BAD_COND; | |
3505 | } | |
252b5132 RH |
3506 | |
3507 | end_of_line (str); | |
3508 | return; | |
3509 | } | |
3510 | ||
3511 | static void | |
3512 | do_fp_ctrl (str, flags) | |
3513 | char * str; | |
3514 | unsigned long flags; | |
3515 | { | |
3516 | /* FP control registers. | |
3517 | Format: <WFS|RFS|WFC|RFC>{cond} Rn */ | |
3518 | ||
ae5ad4ad | 3519 | skip_whitespace (str); |
252b5132 RH |
3520 | |
3521 | if (reg_required_here (&str, 12) == FAIL) | |
3522 | { | |
3523 | if (!inst.error) | |
90ca882f | 3524 | inst.error = BAD_ARGS; |
252b5132 RH |
3525 | return; |
3526 | } | |
3527 | ||
3528 | end_of_line (str); | |
3529 | return; | |
3530 | } | |
3531 | ||
3532 | static void | |
3533 | do_fp_ldst (str, flags) | |
3534 | char * str; | |
3535 | unsigned long flags; | |
3536 | { | |
ae5ad4ad | 3537 | skip_whitespace (str); |
252b5132 RH |
3538 | |
3539 | switch (inst.suffix) | |
3540 | { | |
3541 | case SUFF_S: | |
3542 | break; | |
3543 | case SUFF_D: | |
3544 | inst.instruction |= CP_T_X; | |
3545 | break; | |
3546 | case SUFF_E: | |
3547 | inst.instruction |= CP_T_Y; | |
3548 | break; | |
3549 | case SUFF_P: | |
3550 | inst.instruction |= CP_T_X | CP_T_Y; | |
3551 | break; | |
3552 | default: | |
3553 | abort (); | |
3554 | } | |
3555 | ||
3556 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3557 | { | |
3558 | if (!inst.error) | |
90ca882f | 3559 | inst.error = BAD_ARGS; |
252b5132 RH |
3560 | return; |
3561 | } | |
3562 | ||
3563 | if (skip_past_comma (&str) == FAIL | |
3564 | || cp_address_required_here (&str) == FAIL) | |
3565 | { | |
3566 | if (!inst.error) | |
90ca882f | 3567 | inst.error = BAD_ARGS; |
252b5132 RH |
3568 | return; |
3569 | } | |
3570 | ||
3571 | end_of_line (str); | |
3572 | } | |
3573 | ||
3574 | static void | |
3575 | do_fp_ldmstm (str, flags) | |
3576 | char * str; | |
3577 | unsigned long flags; | |
3578 | { | |
3579 | int num_regs; | |
3580 | ||
ae5ad4ad | 3581 | skip_whitespace (str); |
252b5132 RH |
3582 | |
3583 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3584 | { | |
3585 | if (! inst.error) | |
90ca882f | 3586 | inst.error = BAD_ARGS; |
252b5132 RH |
3587 | return; |
3588 | } | |
3589 | ||
3590 | /* Get Number of registers to transfer */ | |
3591 | if (skip_past_comma (&str) == FAIL | |
3592 | || my_get_expression (&inst.reloc.exp, &str)) | |
3593 | { | |
3594 | if (! inst.error) | |
3595 | inst.error = _("constant expression expected"); | |
3596 | return; | |
3597 | } | |
3598 | ||
3599 | if (inst.reloc.exp.X_op != O_constant) | |
3600 | { | |
3601 | inst.error = _("Constant value required for number of registers"); | |
3602 | return; | |
3603 | } | |
3604 | ||
3605 | num_regs = inst.reloc.exp.X_add_number; | |
3606 | ||
3607 | if (num_regs < 1 || num_regs > 4) | |
3608 | { | |
3609 | inst.error = _("number of registers must be in the range [1:4]"); | |
3610 | return; | |
3611 | } | |
3612 | ||
3613 | switch (num_regs) | |
3614 | { | |
3615 | case 1: | |
3616 | inst.instruction |= CP_T_X; | |
3617 | break; | |
3618 | case 2: | |
3619 | inst.instruction |= CP_T_Y; | |
3620 | break; | |
3621 | case 3: | |
3622 | inst.instruction |= CP_T_Y | CP_T_X; | |
3623 | break; | |
3624 | case 4: | |
3625 | break; | |
3626 | default: | |
3627 | abort (); | |
3628 | } | |
3629 | ||
3630 | if (flags) | |
3631 | { | |
3632 | int reg; | |
3633 | int write_back; | |
3634 | int offset; | |
3635 | ||
3636 | /* The instruction specified "ea" or "fd", so we can only accept | |
3637 | [Rn]{!}. The instruction does not really support stacking or | |
3638 | unstacking, so we have to emulate these by setting appropriate | |
3639 | bits and offsets. */ | |
3640 | if (skip_past_comma (&str) == FAIL | |
3641 | || *str != '[') | |
3642 | { | |
3643 | if (! inst.error) | |
90ca882f | 3644 | inst.error = BAD_ARGS; |
252b5132 RH |
3645 | return; |
3646 | } | |
3647 | ||
3648 | str++; | |
ae5ad4ad | 3649 | skip_whitespace (str); |
252b5132 RH |
3650 | |
3651 | if ((reg = reg_required_here (&str, 16)) == FAIL) | |
3652 | return; | |
3653 | ||
ae5ad4ad | 3654 | skip_whitespace (str); |
252b5132 RH |
3655 | |
3656 | if (*str != ']') | |
3657 | { | |
90ca882f | 3658 | inst.error = BAD_ARGS; |
252b5132 RH |
3659 | return; |
3660 | } | |
3661 | ||
3662 | str++; | |
3663 | if (*str == '!') | |
3664 | { | |
3665 | write_back = 1; | |
3666 | str++; | |
3667 | if (reg == REG_PC) | |
3668 | { | |
3669 | inst.error = _("R15 not allowed as base register with write-back"); | |
3670 | return; | |
3671 | } | |
3672 | } | |
3673 | else | |
3674 | write_back = 0; | |
3675 | ||
3676 | if (flags & CP_T_Pre) | |
3677 | { | |
3678 | /* Pre-decrement */ | |
3679 | offset = 3 * num_regs; | |
3680 | if (write_back) | |
3681 | flags |= CP_T_WB; | |
3682 | } | |
3683 | else | |
3684 | { | |
3685 | /* Post-increment */ | |
3686 | if (write_back) | |
3687 | { | |
3688 | flags |= CP_T_WB; | |
3689 | offset = 3 * num_regs; | |
3690 | } | |
3691 | else | |
3692 | { | |
3693 | /* No write-back, so convert this into a standard pre-increment | |
3694 | instruction -- aesthetically more pleasing. */ | |
3695 | flags = CP_T_Pre | CP_T_UD; | |
3696 | offset = 0; | |
3697 | } | |
3698 | } | |
3699 | ||
3700 | inst.instruction |= flags | offset; | |
3701 | } | |
3702 | else if (skip_past_comma (&str) == FAIL | |
3703 | || cp_address_required_here (&str) == FAIL) | |
3704 | { | |
3705 | if (! inst.error) | |
90ca882f | 3706 | inst.error = BAD_ARGS; |
252b5132 RH |
3707 | return; |
3708 | } | |
3709 | ||
3710 | end_of_line (str); | |
3711 | } | |
3712 | ||
3713 | static void | |
3714 | do_fp_dyadic (str, flags) | |
3715 | char * str; | |
3716 | unsigned long flags; | |
3717 | { | |
ae5ad4ad | 3718 | skip_whitespace (str); |
252b5132 RH |
3719 | |
3720 | switch (inst.suffix) | |
3721 | { | |
3722 | case SUFF_S: | |
3723 | break; | |
3724 | case SUFF_D: | |
3725 | inst.instruction |= 0x00000080; | |
3726 | break; | |
3727 | case SUFF_E: | |
3728 | inst.instruction |= 0x00080000; | |
3729 | break; | |
3730 | default: | |
3731 | abort (); | |
3732 | } | |
3733 | ||
3734 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3735 | { | |
3736 | if (! inst.error) | |
90ca882f | 3737 | inst.error = BAD_ARGS; |
252b5132 RH |
3738 | return; |
3739 | } | |
3740 | ||
3741 | if (skip_past_comma (&str) == FAIL | |
3742 | || fp_reg_required_here (&str, 16) == FAIL) | |
3743 | { | |
3744 | if (! inst.error) | |
90ca882f | 3745 | inst.error = BAD_ARGS; |
252b5132 RH |
3746 | return; |
3747 | } | |
3748 | ||
3749 | if (skip_past_comma (&str) == FAIL | |
3750 | || fp_op2 (&str) == FAIL) | |
3751 | { | |
3752 | if (! inst.error) | |
90ca882f | 3753 | inst.error = BAD_ARGS; |
252b5132 RH |
3754 | return; |
3755 | } | |
3756 | ||
3757 | inst.instruction |= flags; | |
3758 | end_of_line (str); | |
3759 | return; | |
3760 | } | |
3761 | ||
3762 | static void | |
3763 | do_fp_monadic (str, flags) | |
3764 | char * str; | |
3765 | unsigned long flags; | |
3766 | { | |
ae5ad4ad | 3767 | skip_whitespace (str); |
252b5132 RH |
3768 | |
3769 | switch (inst.suffix) | |
3770 | { | |
3771 | case SUFF_S: | |
3772 | break; | |
3773 | case SUFF_D: | |
3774 | inst.instruction |= 0x00000080; | |
3775 | break; | |
3776 | case SUFF_E: | |
3777 | inst.instruction |= 0x00080000; | |
3778 | break; | |
3779 | default: | |
3780 | abort (); | |
3781 | } | |
3782 | ||
3783 | if (fp_reg_required_here (&str, 12) == FAIL) | |
3784 | { | |
3785 | if (! inst.error) | |
90ca882f | 3786 | inst.error = BAD_ARGS; |
252b5132 RH |
3787 | return; |
3788 | } | |
3789 | ||
3790 | if (skip_past_comma (&str) == FAIL | |
3791 | || fp_op2 (&str) == FAIL) | |
3792 | { | |
3793 | if (! inst.error) | |
90ca882f | 3794 | inst.error = BAD_ARGS; |
252b5132 RH |
3795 | return; |
3796 | } | |
3797 | ||
3798 | inst.instruction |= flags; | |
3799 | end_of_line (str); | |
3800 | return; | |
3801 | } | |
3802 | ||
3803 | static void | |
3804 | do_fp_cmp (str, flags) | |
3805 | char * str; | |
3806 | unsigned long flags; | |
3807 | { | |
ae5ad4ad | 3808 | skip_whitespace (str); |
252b5132 RH |
3809 | |
3810 | if (fp_reg_required_here (&str, 16) == FAIL) | |
3811 | { | |
3812 | if (! inst.error) | |
90ca882f | 3813 | inst.error = BAD_ARGS; |
252b5132 RH |
3814 | return; |
3815 | } | |
3816 | ||
3817 | if (skip_past_comma (&str) == FAIL | |
3818 | || fp_op2 (&str) == FAIL) | |
3819 | { | |
3820 | if (! inst.error) | |
90ca882f | 3821 | inst.error = BAD_ARGS; |
252b5132 RH |
3822 | return; |
3823 | } | |
3824 | ||
3825 | inst.instruction |= flags; | |
3826 | end_of_line (str); | |
3827 | return; | |
3828 | } | |
3829 | ||
3830 | static void | |
3831 | do_fp_from_reg (str, flags) | |
3832 | char * str; | |
3833 | unsigned long flags; | |
3834 | { | |
ae5ad4ad | 3835 | skip_whitespace (str); |
252b5132 RH |
3836 | |
3837 | switch (inst.suffix) | |
3838 | { | |
3839 | case SUFF_S: | |
3840 | break; | |
3841 | case SUFF_D: | |
3842 | inst.instruction |= 0x00000080; | |
3843 | break; | |
3844 | case SUFF_E: | |
3845 | inst.instruction |= 0x00080000; | |
3846 | break; | |
3847 | default: | |
3848 | abort (); | |
3849 | } | |
3850 | ||
3851 | if (fp_reg_required_here (&str, 16) == FAIL) | |
3852 | { | |
3853 | if (! inst.error) | |
90ca882f | 3854 | inst.error = BAD_ARGS; |
252b5132 RH |
3855 | return; |
3856 | } | |
3857 | ||
3858 | if (skip_past_comma (&str) == FAIL | |
3859 | || reg_required_here (&str, 12) == FAIL) | |
3860 | { | |
3861 | if (! inst.error) | |
90ca882f | 3862 | inst.error = BAD_ARGS; |
252b5132 RH |
3863 | return; |
3864 | } | |
3865 | ||
3866 | inst.instruction |= flags; | |
3867 | end_of_line (str); | |
3868 | return; | |
3869 | } | |
3870 | ||
3871 | static void | |
3872 | do_fp_to_reg (str, flags) | |
3873 | char * str; | |
3874 | unsigned long flags; | |
3875 | { | |
ae5ad4ad | 3876 | skip_whitespace (str); |
252b5132 RH |
3877 | |
3878 | if (reg_required_here (&str, 12) == FAIL) | |
3879 | return; | |
3880 | ||
3881 | if (skip_past_comma (&str) == FAIL | |
3882 | || fp_reg_required_here (&str, 0) == FAIL) | |
3883 | { | |
3884 | if (! inst.error) | |
90ca882f | 3885 | inst.error = BAD_ARGS; |
252b5132 RH |
3886 | return; |
3887 | } | |
3888 | ||
3889 | inst.instruction |= flags; | |
3890 | end_of_line (str); | |
3891 | return; | |
3892 | } | |
3893 | ||
3894 | /* Thumb specific routines */ | |
3895 | ||
3896 | /* Parse and validate that a register is of the right form, this saves | |
3897 | repeated checking of this information in many similar cases. | |
3898 | Unlike the 32-bit case we do not insert the register into the opcode | |
3899 | here, since the position is often unknown until the full instruction | |
3900 | has been parsed. */ | |
3901 | static int | |
3902 | thumb_reg (strp, hi_lo) | |
3903 | char ** strp; | |
3904 | int hi_lo; | |
3905 | { | |
3906 | int reg; | |
3907 | ||
3908 | if ((reg = reg_required_here (strp, -1)) == FAIL) | |
3909 | return FAIL; | |
3910 | ||
3911 | switch (hi_lo) | |
3912 | { | |
3913 | case THUMB_REG_LO: | |
3914 | if (reg > 7) | |
3915 | { | |
3916 | inst.error = _("lo register required"); | |
3917 | return FAIL; | |
3918 | } | |
3919 | break; | |
3920 | ||
3921 | case THUMB_REG_HI: | |
3922 | if (reg < 8) | |
3923 | { | |
3924 | inst.error = _("hi register required"); | |
3925 | return FAIL; | |
3926 | } | |
3927 | break; | |
3928 | ||
3929 | default: | |
3930 | break; | |
3931 | } | |
3932 | ||
3933 | return reg; | |
3934 | } | |
3935 | ||
3936 | /* Parse an add or subtract instruction, SUBTRACT is non-zero if the opcode | |
3937 | was SUB. */ | |
3938 | static void | |
3939 | thumb_add_sub (str, subtract) | |
3940 | char * str; | |
3941 | int subtract; | |
3942 | { | |
3943 | int Rd, Rs, Rn = FAIL; | |
3944 | ||
ae5ad4ad | 3945 | skip_whitespace (str); |
252b5132 RH |
3946 | |
3947 | if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL | |
3948 | || skip_past_comma (&str) == FAIL) | |
3949 | { | |
3950 | if (! inst.error) | |
90ca882f | 3951 | inst.error = BAD_ARGS; |
252b5132 RH |
3952 | return; |
3953 | } | |
3954 | ||
3955 | if (is_immediate_prefix (*str)) | |
3956 | { | |
3957 | Rs = Rd; | |
3958 | str++; | |
3959 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3960 | return; | |
3961 | } | |
3962 | else | |
3963 | { | |
3964 | if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
3965 | return; | |
3966 | ||
3967 | if (skip_past_comma (&str) == FAIL) | |
3968 | { | |
3969 | /* Two operand format, shuffle the registers and pretend there | |
3970 | are 3 */ | |
3971 | Rn = Rs; | |
3972 | Rs = Rd; | |
3973 | } | |
3974 | else if (is_immediate_prefix (*str)) | |
3975 | { | |
3976 | str++; | |
3977 | if (my_get_expression (&inst.reloc.exp, &str)) | |
3978 | return; | |
3979 | } | |
3980 | else if ((Rn = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
3981 | return; | |
3982 | } | |
3983 | ||
3984 | /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; | |
3985 | for the latter case, EXPR contains the immediate that was found. */ | |
3986 | if (Rn != FAIL) | |
3987 | { | |
3988 | /* All register format. */ | |
3989 | if (Rd > 7 || Rs > 7 || Rn > 7) | |
3990 | { | |
3991 | if (Rs != Rd) | |
3992 | { | |
3993 | inst.error = _("dest and source1 must be the same register"); | |
3994 | return; | |
3995 | } | |
3996 | ||
3997 | /* Can't do this for SUB */ | |
3998 | if (subtract) | |
3999 | { | |
4000 | inst.error = _("subtract valid only on lo regs"); | |
4001 | return; | |
4002 | } | |
4003 | ||
4004 | inst.instruction = (T_OPCODE_ADD_HI | |
4005 | | (Rd > 7 ? THUMB_H1 : 0) | |
4006 | | (Rn > 7 ? THUMB_H2 : 0)); | |
4007 | inst.instruction |= (Rd & 7) | ((Rn & 7) << 3); | |
4008 | } | |
4009 | else | |
4010 | { | |
4011 | inst.instruction = subtract ? T_OPCODE_SUB_R3 : T_OPCODE_ADD_R3; | |
4012 | inst.instruction |= Rd | (Rs << 3) | (Rn << 6); | |
4013 | } | |
4014 | } | |
4015 | else | |
4016 | { | |
4017 | /* Immediate expression, now things start to get nasty. */ | |
4018 | ||
4019 | /* First deal with HI regs, only very restricted cases allowed: | |
4020 | Adjusting SP, and using PC or SP to get an address. */ | |
4021 | if ((Rd > 7 && (Rd != REG_SP || Rs != REG_SP)) | |
4022 | || (Rs > 7 && Rs != REG_SP && Rs != REG_PC)) | |
4023 | { | |
4024 | inst.error = _("invalid Hi register with immediate"); | |
4025 | return; | |
4026 | } | |
4027 | ||
4028 | if (inst.reloc.exp.X_op != O_constant) | |
4029 | { | |
4030 | /* Value isn't known yet, all we can do is store all the fragments | |
4031 | we know about in the instruction and let the reloc hacking | |
4032 | work it all out. */ | |
4033 | inst.instruction = (subtract ? 0x8000 : 0) | (Rd << 4) | Rs; | |
4034 | inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; | |
4035 | } | |
4036 | else | |
4037 | { | |
4038 | int offset = inst.reloc.exp.X_add_number; | |
4039 | ||
4040 | if (subtract) | |
4041 | offset = -offset; | |
4042 | ||
4043 | if (offset < 0) | |
4044 | { | |
4045 | offset = -offset; | |
4046 | subtract = 1; | |
4047 | ||
4048 | /* Quick check, in case offset is MIN_INT */ | |
4049 | if (offset < 0) | |
4050 | { | |
4051 | inst.error = _("immediate value out of range"); | |
4052 | return; | |
4053 | } | |
4054 | } | |
4055 | else | |
4056 | subtract = 0; | |
4057 | ||
4058 | if (Rd == REG_SP) | |
4059 | { | |
4060 | if (offset & ~0x1fc) | |
4061 | { | |
4062 | inst.error = _("invalid immediate value for stack adjust"); | |
4063 | return; | |
4064 | } | |
4065 | inst.instruction = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; | |
4066 | inst.instruction |= offset >> 2; | |
4067 | } | |
4068 | else if (Rs == REG_PC || Rs == REG_SP) | |
4069 | { | |
4070 | if (subtract | |
4071 | || (offset & ~0x3fc)) | |
4072 | { | |
4073 | inst.error = _("invalid immediate for address calculation"); | |
4074 | return; | |
4075 | } | |
4076 | inst.instruction = (Rs == REG_PC ? T_OPCODE_ADD_PC | |
4077 | : T_OPCODE_ADD_SP); | |
4078 | inst.instruction |= (Rd << 8) | (offset >> 2); | |
4079 | } | |
4080 | else if (Rs == Rd) | |
4081 | { | |
4082 | if (offset & ~0xff) | |
4083 | { | |
4084 | inst.error = _("immediate value out of range"); | |
4085 | return; | |
4086 | } | |
4087 | inst.instruction = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; | |
4088 | inst.instruction |= (Rd << 8) | offset; | |
4089 | } | |
4090 | else | |
4091 | { | |
4092 | if (offset & ~0x7) | |
4093 | { | |
4094 | inst.error = _("immediate value out of range"); | |
4095 | return; | |
4096 | } | |
4097 | inst.instruction = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; | |
4098 | inst.instruction |= Rd | (Rs << 3) | (offset << 6); | |
4099 | } | |
4100 | } | |
4101 | } | |
4102 | end_of_line (str); | |
4103 | } | |
4104 | ||
4105 | static void | |
4106 | thumb_shift (str, shift) | |
4107 | char * str; | |
4108 | int shift; | |
4109 | { | |
4110 | int Rd, Rs, Rn = FAIL; | |
4111 | ||
ae5ad4ad | 4112 | skip_whitespace (str); |
252b5132 RH |
4113 | |
4114 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4115 | || skip_past_comma (&str) == FAIL) | |
4116 | { | |
4117 | if (! inst.error) | |
90ca882f | 4118 | inst.error = BAD_ARGS; |
252b5132 RH |
4119 | return; |
4120 | } | |
4121 | ||
4122 | if (is_immediate_prefix (*str)) | |
4123 | { | |
4124 | /* Two operand immediate format, set Rs to Rd. */ | |
4125 | Rs = Rd; | |
4126 | str++; | |
4127 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4128 | return; | |
4129 | } | |
4130 | else | |
4131 | { | |
4132 | if ((Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4133 | return; | |
4134 | ||
4135 | if (skip_past_comma (&str) == FAIL) | |
4136 | { | |
4137 | /* Two operand format, shuffle the registers and pretend there | |
4138 | are 3 */ | |
4139 | Rn = Rs; | |
4140 | Rs = Rd; | |
4141 | } | |
4142 | else if (is_immediate_prefix (*str)) | |
4143 | { | |
4144 | str++; | |
4145 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4146 | return; | |
4147 | } | |
4148 | else if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4149 | return; | |
4150 | } | |
4151 | ||
4152 | /* We now have Rd and Rs set to registers, and Rn set to a register or FAIL; | |
4153 | for the latter case, EXPR contains the immediate that was found. */ | |
4154 | ||
4155 | if (Rn != FAIL) | |
4156 | { | |
4157 | if (Rs != Rd) | |
4158 | { | |
4159 | inst.error = _("source1 and dest must be same register"); | |
4160 | return; | |
4161 | } | |
4162 | ||
4163 | switch (shift) | |
4164 | { | |
4165 | case THUMB_ASR: inst.instruction = T_OPCODE_ASR_R; break; | |
4166 | case THUMB_LSL: inst.instruction = T_OPCODE_LSL_R; break; | |
4167 | case THUMB_LSR: inst.instruction = T_OPCODE_LSR_R; break; | |
4168 | } | |
4169 | ||
4170 | inst.instruction |= Rd | (Rn << 3); | |
4171 | } | |
4172 | else | |
4173 | { | |
4174 | switch (shift) | |
4175 | { | |
4176 | case THUMB_ASR: inst.instruction = T_OPCODE_ASR_I; break; | |
4177 | case THUMB_LSL: inst.instruction = T_OPCODE_LSL_I; break; | |
4178 | case THUMB_LSR: inst.instruction = T_OPCODE_LSR_I; break; | |
4179 | } | |
4180 | ||
4181 | if (inst.reloc.exp.X_op != O_constant) | |
4182 | { | |
4183 | /* Value isn't known yet, create a dummy reloc and let reloc | |
4184 | hacking fix it up */ | |
4185 | ||
4186 | inst.reloc.type = BFD_RELOC_ARM_THUMB_SHIFT; | |
4187 | } | |
4188 | else | |
4189 | { | |
4190 | unsigned shift_value = inst.reloc.exp.X_add_number; | |
4191 | ||
4192 | if (shift_value > 32 || (shift_value == 32 && shift == THUMB_LSL)) | |
4193 | { | |
4194 | inst.error = _("Invalid immediate for shift"); | |
4195 | return; | |
4196 | } | |
4197 | ||
4198 | /* Shifts of zero are handled by converting to LSL */ | |
4199 | if (shift_value == 0) | |
4200 | inst.instruction = T_OPCODE_LSL_I; | |
4201 | ||
4202 | /* Shifts of 32 are encoded as a shift of zero */ | |
4203 | if (shift_value == 32) | |
4204 | shift_value = 0; | |
4205 | ||
4206 | inst.instruction |= shift_value << 6; | |
4207 | } | |
4208 | ||
4209 | inst.instruction |= Rd | (Rs << 3); | |
4210 | } | |
4211 | end_of_line (str); | |
4212 | } | |
4213 | ||
4214 | static void | |
4215 | thumb_mov_compare (str, move) | |
4216 | char * str; | |
4217 | int move; | |
4218 | { | |
4219 | int Rd, Rs = FAIL; | |
4220 | ||
ae5ad4ad | 4221 | skip_whitespace (str); |
252b5132 RH |
4222 | |
4223 | if ((Rd = thumb_reg (&str, THUMB_REG_ANY)) == FAIL | |
4224 | || skip_past_comma (&str) == FAIL) | |
4225 | { | |
4226 | if (! inst.error) | |
90ca882f | 4227 | inst.error = BAD_ARGS; |
252b5132 RH |
4228 | return; |
4229 | } | |
4230 | ||
4231 | if (is_immediate_prefix (*str)) | |
4232 | { | |
4233 | str++; | |
4234 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4235 | return; | |
4236 | } | |
4237 | else if ((Rs = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4238 | return; | |
4239 | ||
4240 | if (Rs != FAIL) | |
4241 | { | |
4242 | if (Rs < 8 && Rd < 8) | |
4243 | { | |
4244 | if (move == THUMB_MOVE) | |
4245 | /* A move of two lowregs is encoded as ADD Rd, Rs, #0 | |
4246 | since a MOV instruction produces unpredictable results */ | |
4247 | inst.instruction = T_OPCODE_ADD_I3; | |
4248 | else | |
4249 | inst.instruction = T_OPCODE_CMP_LR; | |
4250 | inst.instruction |= Rd | (Rs << 3); | |
4251 | } | |
4252 | else | |
4253 | { | |
4254 | if (move == THUMB_MOVE) | |
4255 | inst.instruction = T_OPCODE_MOV_HR; | |
4256 | else | |
4257 | inst.instruction = T_OPCODE_CMP_HR; | |
4258 | ||
4259 | if (Rd > 7) | |
4260 | inst.instruction |= THUMB_H1; | |
4261 | ||
4262 | if (Rs > 7) | |
4263 | inst.instruction |= THUMB_H2; | |
4264 | ||
4265 | inst.instruction |= (Rd & 7) | ((Rs & 7) << 3); | |
4266 | } | |
4267 | } | |
4268 | else | |
4269 | { | |
4270 | if (Rd > 7) | |
4271 | { | |
4272 | inst.error = _("only lo regs allowed with immediate"); | |
4273 | return; | |
4274 | } | |
4275 | ||
4276 | if (move == THUMB_MOVE) | |
4277 | inst.instruction = T_OPCODE_MOV_I8; | |
4278 | else | |
4279 | inst.instruction = T_OPCODE_CMP_I8; | |
4280 | ||
4281 | inst.instruction |= Rd << 8; | |
4282 | ||
4283 | if (inst.reloc.exp.X_op != O_constant) | |
4284 | inst.reloc.type = BFD_RELOC_ARM_THUMB_IMM; | |
4285 | else | |
4286 | { | |
4287 | unsigned value = inst.reloc.exp.X_add_number; | |
4288 | ||
4289 | if (value > 255) | |
4290 | { | |
4291 | inst.error = _("invalid immediate"); | |
4292 | return; | |
4293 | } | |
4294 | ||
4295 | inst.instruction |= value; | |
4296 | } | |
4297 | } | |
4298 | ||
4299 | end_of_line (str); | |
4300 | } | |
4301 | ||
4302 | static void | |
4303 | thumb_load_store (str, load_store, size) | |
4304 | char * str; | |
4305 | int load_store; | |
4306 | int size; | |
4307 | { | |
4308 | int Rd, Rb, Ro = FAIL; | |
4309 | ||
ae5ad4ad | 4310 | skip_whitespace (str); |
252b5132 RH |
4311 | |
4312 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4313 | || skip_past_comma (&str) == FAIL) | |
4314 | { | |
4315 | if (! inst.error) | |
90ca882f | 4316 | inst.error = BAD_ARGS; |
252b5132 RH |
4317 | return; |
4318 | } | |
4319 | ||
4320 | if (*str == '[') | |
4321 | { | |
4322 | str++; | |
4323 | if ((Rb = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4324 | return; | |
4325 | ||
4326 | if (skip_past_comma (&str) != FAIL) | |
4327 | { | |
4328 | if (is_immediate_prefix (*str)) | |
4329 | { | |
4330 | str++; | |
4331 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4332 | return; | |
4333 | } | |
4334 | else if ((Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4335 | return; | |
4336 | } | |
4337 | else | |
4338 | { | |
4339 | inst.reloc.exp.X_op = O_constant; | |
4340 | inst.reloc.exp.X_add_number = 0; | |
4341 | } | |
4342 | ||
4343 | if (*str != ']') | |
4344 | { | |
4345 | inst.error = _("expected ']'"); | |
4346 | return; | |
4347 | } | |
4348 | str++; | |
4349 | } | |
4350 | else if (*str == '=') | |
4351 | { | |
4352 | /* Parse an "ldr Rd, =expr" instruction; this is another pseudo op */ | |
4353 | str++; | |
4354 | ||
ae5ad4ad | 4355 | skip_whitespace (str); |
252b5132 RH |
4356 | |
4357 | if (my_get_expression (& inst.reloc.exp, & str)) | |
4358 | return; | |
4359 | ||
4360 | end_of_line (str); | |
4361 | ||
4362 | if ( inst.reloc.exp.X_op != O_constant | |
4363 | && inst.reloc.exp.X_op != O_symbol) | |
4364 | { | |
4365 | inst.error = "Constant expression expected"; | |
4366 | return; | |
4367 | } | |
4368 | ||
4369 | if (inst.reloc.exp.X_op == O_constant | |
4370 | && ((inst.reloc.exp.X_add_number & ~0xFF) == 0)) | |
4371 | { | |
4372 | /* This can be done with a mov instruction */ | |
4373 | ||
4374 | inst.instruction = T_OPCODE_MOV_I8 | (Rd << 8); | |
4375 | inst.instruction |= inst.reloc.exp.X_add_number; | |
4376 | return; | |
4377 | } | |
4378 | ||
4379 | /* Insert into literal pool */ | |
4380 | if (add_to_lit_pool () == FAIL) | |
4381 | { | |
4382 | if (!inst.error) | |
4383 | inst.error = "literal pool insertion failed"; | |
4384 | return; | |
4385 | } | |
4386 | ||
4387 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4388 | inst.reloc.pc_rel = 1; | |
4389 | inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); | |
4390 | inst.reloc.exp.X_add_number += 4; /* Adjust ARM pipeline offset to Thumb */ | |
4391 | ||
4392 | return; | |
4393 | } | |
4394 | else | |
4395 | { | |
4396 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4397 | return; | |
4398 | ||
4399 | inst.instruction = T_OPCODE_LDR_PC | (Rd << 8); | |
4400 | inst.reloc.pc_rel = 1; | |
4401 | inst.reloc.exp.X_add_number -= 4; /* Pipeline offset */ | |
4402 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4403 | end_of_line (str); | |
4404 | return; | |
4405 | } | |
4406 | ||
4407 | if (Rb == REG_PC || Rb == REG_SP) | |
4408 | { | |
4409 | if (size != THUMB_WORD) | |
4410 | { | |
4411 | inst.error = _("byte or halfword not valid for base register"); | |
4412 | return; | |
4413 | } | |
4414 | else if (Rb == REG_PC && load_store != THUMB_LOAD) | |
4415 | { | |
4416 | inst.error = _("R15 based store not allowed"); | |
4417 | return; | |
4418 | } | |
4419 | else if (Ro != FAIL) | |
4420 | { | |
4421 | inst.error = _("Invalid base register for register offset"); | |
4422 | return; | |
4423 | } | |
4424 | ||
4425 | if (Rb == REG_PC) | |
4426 | inst.instruction = T_OPCODE_LDR_PC; | |
4427 | else if (load_store == THUMB_LOAD) | |
4428 | inst.instruction = T_OPCODE_LDR_SP; | |
4429 | else | |
4430 | inst.instruction = T_OPCODE_STR_SP; | |
4431 | ||
4432 | inst.instruction |= Rd << 8; | |
4433 | if (inst.reloc.exp.X_op == O_constant) | |
4434 | { | |
4435 | unsigned offset = inst.reloc.exp.X_add_number; | |
4436 | ||
4437 | if (offset & ~0x3fc) | |
4438 | { | |
4439 | inst.error = _("invalid offset"); | |
4440 | return; | |
4441 | } | |
4442 | ||
4443 | inst.instruction |= offset >> 2; | |
4444 | } | |
4445 | else | |
4446 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4447 | } | |
4448 | else if (Rb > 7) | |
4449 | { | |
4450 | inst.error = _("invalid base register in load/store"); | |
4451 | return; | |
4452 | } | |
4453 | else if (Ro == FAIL) | |
4454 | { | |
4455 | /* Immediate offset */ | |
4456 | if (size == THUMB_WORD) | |
4457 | inst.instruction = (load_store == THUMB_LOAD | |
4458 | ? T_OPCODE_LDR_IW : T_OPCODE_STR_IW); | |
4459 | else if (size == THUMB_HALFWORD) | |
4460 | inst.instruction = (load_store == THUMB_LOAD | |
4461 | ? T_OPCODE_LDR_IH : T_OPCODE_STR_IH); | |
4462 | else | |
4463 | inst.instruction = (load_store == THUMB_LOAD | |
4464 | ? T_OPCODE_LDR_IB : T_OPCODE_STR_IB); | |
4465 | ||
4466 | inst.instruction |= Rd | (Rb << 3); | |
4467 | ||
4468 | if (inst.reloc.exp.X_op == O_constant) | |
4469 | { | |
4470 | unsigned offset = inst.reloc.exp.X_add_number; | |
4471 | ||
4472 | if (offset & ~(0x1f << size)) | |
4473 | { | |
4474 | inst.error = _("Invalid offset"); | |
4475 | return; | |
4476 | } | |
4477 | inst.instruction |= (offset >> size) << 6; | |
4478 | } | |
4479 | else | |
4480 | inst.reloc.type = BFD_RELOC_ARM_THUMB_OFFSET; | |
4481 | } | |
4482 | else | |
4483 | { | |
4484 | /* Register offset */ | |
4485 | if (size == THUMB_WORD) | |
4486 | inst.instruction = (load_store == THUMB_LOAD | |
4487 | ? T_OPCODE_LDR_RW : T_OPCODE_STR_RW); | |
4488 | else if (size == THUMB_HALFWORD) | |
4489 | inst.instruction = (load_store == THUMB_LOAD | |
4490 | ? T_OPCODE_LDR_RH : T_OPCODE_STR_RH); | |
4491 | else | |
4492 | inst.instruction = (load_store == THUMB_LOAD | |
4493 | ? T_OPCODE_LDR_RB : T_OPCODE_STR_RB); | |
4494 | ||
4495 | inst.instruction |= Rd | (Rb << 3) | (Ro << 6); | |
4496 | } | |
4497 | ||
4498 | end_of_line (str); | |
4499 | } | |
4500 | ||
4501 | static void | |
4502 | do_t_nop (str) | |
4503 | char * str; | |
4504 | { | |
4505 | /* Do nothing */ | |
4506 | end_of_line (str); | |
4507 | return; | |
4508 | } | |
4509 | ||
4510 | /* Handle the Format 4 instructions that do not have equivalents in other | |
4511 | formats. That is, ADC, AND, EOR, SBC, ROR, TST, NEG, CMN, ORR, MUL, | |
4512 | BIC and MVN. */ | |
4513 | static void | |
4514 | do_t_arit (str) | |
4515 | char * str; | |
4516 | { | |
4517 | int Rd, Rs, Rn; | |
4518 | ||
ae5ad4ad | 4519 | skip_whitespace (str); |
252b5132 | 4520 | |
92a66162 DL |
4521 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL |
4522 | || skip_past_comma (&str) == FAIL | |
252b5132 RH |
4523 | || (Rs = thumb_reg (&str, THUMB_REG_LO)) == FAIL) |
4524 | { | |
92a66162 DL |
4525 | inst.error = BAD_ARGS; |
4526 | return; | |
252b5132 RH |
4527 | } |
4528 | ||
4529 | if (skip_past_comma (&str) != FAIL) | |
4530 | { | |
4531 | /* Three operand format not allowed for TST, CMN, NEG and MVN. | |
4532 | (It isn't allowed for CMP either, but that isn't handled by this | |
4533 | function.) */ | |
4534 | if (inst.instruction == T_OPCODE_TST | |
4535 | || inst.instruction == T_OPCODE_CMN | |
4536 | || inst.instruction == T_OPCODE_NEG | |
4537 | || inst.instruction == T_OPCODE_MVN) | |
4538 | { | |
90ca882f | 4539 | inst.error = BAD_ARGS; |
252b5132 RH |
4540 | return; |
4541 | } | |
4542 | ||
4543 | if ((Rn = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4544 | return; | |
4545 | ||
4546 | if (Rs != Rd) | |
4547 | { | |
4548 | inst.error = _("dest and source1 one must be the same register"); | |
4549 | return; | |
4550 | } | |
4551 | Rs = Rn; | |
4552 | } | |
4553 | ||
4554 | if (inst.instruction == T_OPCODE_MUL | |
4555 | && Rs == Rd) | |
4556 | as_tsktsk (_("Rs and Rd must be different in MUL")); | |
4557 | ||
4558 | inst.instruction |= Rd | (Rs << 3); | |
4559 | end_of_line (str); | |
4560 | } | |
4561 | ||
4562 | static void | |
4563 | do_t_add (str) | |
4564 | char * str; | |
4565 | { | |
4566 | thumb_add_sub (str, 0); | |
4567 | } | |
4568 | ||
4569 | static void | |
4570 | do_t_asr (str) | |
4571 | char * str; | |
4572 | { | |
4573 | thumb_shift (str, THUMB_ASR); | |
4574 | } | |
4575 | ||
4576 | static void | |
4577 | do_t_branch9 (str) | |
4578 | char * str; | |
4579 | { | |
4580 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4581 | return; | |
4582 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH9; | |
4583 | inst.reloc.pc_rel = 1; | |
4584 | end_of_line (str); | |
4585 | } | |
4586 | ||
4587 | static void | |
4588 | do_t_branch12 (str) | |
4589 | char * str; | |
4590 | { | |
4591 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4592 | return; | |
4593 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH12; | |
4594 | inst.reloc.pc_rel = 1; | |
4595 | end_of_line (str); | |
4596 | } | |
4597 | ||
4598 | /* Find the real, Thumb encoded start of a Thumb function. */ | |
4599 | ||
4600 | static symbolS * | |
4601 | find_real_start (symbolP) | |
4602 | symbolS * symbolP; | |
4603 | { | |
4604 | char * real_start; | |
4605 | const char * name = S_GET_NAME (symbolP); | |
4606 | symbolS * new_target; | |
4607 | ||
ae5ad4ad | 4608 | /* This definiton must agree with the one in gcc/config/arm/thumb.c */ |
252b5132 RH |
4609 | #define STUB_NAME ".real_start_of" |
4610 | ||
4611 | if (name == NULL) | |
4612 | abort(); | |
4613 | ||
4614 | /* Names that start with '.' are local labels, not function entry points. | |
4615 | The compiler may generate BL instructions to these labels because it | |
4616 | needs to perform a branch to a far away location. */ | |
4617 | if (name[0] == '.') | |
4618 | return symbolP; | |
4619 | ||
4620 | real_start = malloc (strlen (name) + strlen (STUB_NAME) + 1); | |
4621 | sprintf (real_start, "%s%s", STUB_NAME, name); | |
4622 | ||
4623 | new_target = symbol_find (real_start); | |
4624 | ||
4625 | if (new_target == NULL) | |
4626 | { | |
4627 | as_warn ("Failed to find real start of function: %s\n", name); | |
4628 | new_target = symbolP; | |
4629 | } | |
4630 | ||
4631 | free (real_start); | |
4632 | ||
4633 | return new_target; | |
4634 | } | |
4635 | ||
4636 | ||
4637 | static void | |
4638 | do_t_branch23 (str) | |
4639 | char * str; | |
4640 | { | |
ae5ad4ad | 4641 | if (my_get_expression (& inst.reloc.exp, & str)) |
252b5132 | 4642 | return; |
ae5ad4ad | 4643 | |
252b5132 RH |
4644 | inst.reloc.type = BFD_RELOC_THUMB_PCREL_BRANCH23; |
4645 | inst.reloc.pc_rel = 1; | |
4646 | end_of_line (str); | |
4647 | ||
4648 | /* If the destination of the branch is a defined symbol which does not have | |
4649 | the THUMB_FUNC attribute, then we must be calling a function which has | |
4650 | the (interfacearm) attribute. We look for the Thumb entry point to that | |
4651 | function and change the branch to refer to that function instead. */ | |
4652 | if ( inst.reloc.exp.X_op == O_symbol | |
4653 | && inst.reloc.exp.X_add_symbol != NULL | |
4654 | && S_IS_DEFINED (inst.reloc.exp.X_add_symbol) | |
4655 | && ! THUMB_IS_FUNC (inst.reloc.exp.X_add_symbol)) | |
4656 | inst.reloc.exp.X_add_symbol = find_real_start (inst.reloc.exp.X_add_symbol); | |
4657 | } | |
4658 | ||
4659 | static void | |
4660 | do_t_bx (str) | |
4661 | char * str; | |
4662 | { | |
4663 | int reg; | |
4664 | ||
ae5ad4ad | 4665 | skip_whitespace (str); |
252b5132 RH |
4666 | |
4667 | if ((reg = thumb_reg (&str, THUMB_REG_ANY)) == FAIL) | |
4668 | return; | |
4669 | ||
4670 | /* This sets THUMB_H2 from the top bit of reg. */ | |
4671 | inst.instruction |= reg << 3; | |
4672 | ||
4673 | /* ??? FIXME: Should add a hacky reloc here if reg is REG_PC. The reloc | |
4674 | should cause the alignment to be checked once it is known. This is | |
4675 | because BX PC only works if the instruction is word aligned. */ | |
4676 | ||
4677 | end_of_line (str); | |
4678 | } | |
4679 | ||
4680 | static void | |
4681 | do_t_compare (str) | |
4682 | char * str; | |
4683 | { | |
4684 | thumb_mov_compare (str, THUMB_COMPARE); | |
4685 | } | |
4686 | ||
4687 | static void | |
4688 | do_t_ldmstm (str) | |
4689 | char * str; | |
4690 | { | |
4691 | int Rb; | |
4692 | long range; | |
4693 | ||
ae5ad4ad | 4694 | skip_whitespace (str); |
252b5132 RH |
4695 | |
4696 | if ((Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL) | |
4697 | return; | |
4698 | ||
4699 | if (*str != '!') | |
4700 | as_warn (_("Inserted missing '!': load/store multiple always writes back base register")); | |
4701 | else | |
4702 | str++; | |
4703 | ||
4704 | if (skip_past_comma (&str) == FAIL | |
4705 | || (range = reg_list (&str)) == FAIL) | |
4706 | { | |
4707 | if (! inst.error) | |
90ca882f | 4708 | inst.error = BAD_ARGS; |
252b5132 RH |
4709 | return; |
4710 | } | |
4711 | ||
4712 | if (inst.reloc.type != BFD_RELOC_NONE) | |
4713 | { | |
4714 | /* This really doesn't seem worth it. */ | |
4715 | inst.reloc.type = BFD_RELOC_NONE; | |
4716 | inst.error = _("Expression too complex"); | |
4717 | return; | |
4718 | } | |
4719 | ||
4720 | if (range & ~0xff) | |
4721 | { | |
4722 | inst.error = _("only lo-regs valid in load/store multiple"); | |
4723 | return; | |
4724 | } | |
4725 | ||
4726 | inst.instruction |= (Rb << 8) | range; | |
4727 | end_of_line (str); | |
4728 | } | |
4729 | ||
4730 | static void | |
4731 | do_t_ldr (str) | |
4732 | char * str; | |
4733 | { | |
4734 | thumb_load_store (str, THUMB_LOAD, THUMB_WORD); | |
4735 | } | |
4736 | ||
4737 | static void | |
4738 | do_t_ldrb (str) | |
4739 | char * str; | |
4740 | { | |
4741 | thumb_load_store (str, THUMB_LOAD, THUMB_BYTE); | |
4742 | } | |
4743 | ||
4744 | static void | |
4745 | do_t_ldrh (str) | |
4746 | char * str; | |
4747 | { | |
4748 | thumb_load_store (str, THUMB_LOAD, THUMB_HALFWORD); | |
4749 | } | |
4750 | ||
4751 | static void | |
4752 | do_t_lds (str) | |
4753 | char * str; | |
4754 | { | |
4755 | int Rd, Rb, Ro; | |
4756 | ||
ae5ad4ad | 4757 | skip_whitespace (str); |
252b5132 RH |
4758 | |
4759 | if ((Rd = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4760 | || skip_past_comma (&str) == FAIL | |
4761 | || *str++ != '[' | |
4762 | || (Rb = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4763 | || skip_past_comma (&str) == FAIL | |
4764 | || (Ro = thumb_reg (&str, THUMB_REG_LO)) == FAIL | |
4765 | || *str++ != ']') | |
4766 | { | |
4767 | if (! inst.error) | |
4768 | inst.error = _("Syntax: ldrs[b] Rd, [Rb, Ro]"); | |
4769 | return; | |
4770 | } | |
4771 | ||
4772 | inst.instruction |= Rd | (Rb << 3) | (Ro << 6); | |
4773 | end_of_line (str); | |
4774 | } | |
4775 | ||
4776 | static void | |
4777 | do_t_lsl (str) | |
4778 | char * str; | |
4779 | { | |
4780 | thumb_shift (str, THUMB_LSL); | |
4781 | } | |
4782 | ||
4783 | static void | |
4784 | do_t_lsr (str) | |
4785 | char * str; | |
4786 | { | |
4787 | thumb_shift (str, THUMB_LSR); | |
4788 | } | |
4789 | ||
4790 | static void | |
4791 | do_t_mov (str) | |
4792 | char * str; | |
4793 | { | |
4794 | thumb_mov_compare (str, THUMB_MOVE); | |
4795 | } | |
4796 | ||
4797 | static void | |
4798 | do_t_push_pop (str) | |
4799 | char * str; | |
4800 | { | |
4801 | long range; | |
4802 | ||
ae5ad4ad | 4803 | skip_whitespace (str); |
252b5132 RH |
4804 | |
4805 | if ((range = reg_list (&str)) == FAIL) | |
4806 | { | |
4807 | if (! inst.error) | |
90ca882f | 4808 | inst.error = BAD_ARGS; |
252b5132 RH |
4809 | return; |
4810 | } | |
4811 | ||
4812 | if (inst.reloc.type != BFD_RELOC_NONE) | |
4813 | { | |
4814 | /* This really doesn't seem worth it. */ | |
4815 | inst.reloc.type = BFD_RELOC_NONE; | |
4816 | inst.error = _("Expression too complex"); | |
4817 | return; | |
4818 | } | |
4819 | ||
4820 | if (range & ~0xff) | |
4821 | { | |
4822 | if ((inst.instruction == T_OPCODE_PUSH | |
4823 | && (range & ~0xff) == 1 << REG_LR) | |
4824 | || (inst.instruction == T_OPCODE_POP | |
4825 | && (range & ~0xff) == 1 << REG_PC)) | |
4826 | { | |
4827 | inst.instruction |= THUMB_PP_PC_LR; | |
4828 | range &= 0xff; | |
4829 | } | |
4830 | else | |
4831 | { | |
4832 | inst.error = _("invalid register list to push/pop instruction"); | |
4833 | return; | |
4834 | } | |
4835 | } | |
4836 | ||
4837 | inst.instruction |= range; | |
4838 | end_of_line (str); | |
4839 | } | |
4840 | ||
4841 | static void | |
4842 | do_t_str (str) | |
4843 | char * str; | |
4844 | { | |
4845 | thumb_load_store (str, THUMB_STORE, THUMB_WORD); | |
4846 | } | |
4847 | ||
4848 | static void | |
4849 | do_t_strb (str) | |
4850 | char * str; | |
4851 | { | |
4852 | thumb_load_store (str, THUMB_STORE, THUMB_BYTE); | |
4853 | } | |
4854 | ||
4855 | static void | |
4856 | do_t_strh (str) | |
4857 | char * str; | |
4858 | { | |
4859 | thumb_load_store (str, THUMB_STORE, THUMB_HALFWORD); | |
4860 | } | |
4861 | ||
4862 | static void | |
4863 | do_t_sub (str) | |
4864 | char * str; | |
4865 | { | |
4866 | thumb_add_sub (str, 1); | |
4867 | } | |
4868 | ||
4869 | static void | |
4870 | do_t_swi (str) | |
4871 | char * str; | |
4872 | { | |
ae5ad4ad | 4873 | skip_whitespace (str); |
252b5132 RH |
4874 | |
4875 | if (my_get_expression (&inst.reloc.exp, &str)) | |
4876 | return; | |
4877 | ||
4878 | inst.reloc.type = BFD_RELOC_ARM_SWI; | |
4879 | end_of_line (str); | |
4880 | return; | |
4881 | } | |
4882 | ||
4883 | static void | |
4884 | do_t_adr (str) | |
4885 | char * str; | |
4886 | { | |
4887 | /* This is a pseudo-op of the form "adr rd, label" to be converted | |
4888 | into a relative address of the form "add rd, pc, #label-.-4" */ | |
ae5ad4ad | 4889 | skip_whitespace (str); |
252b5132 RH |
4890 | |
4891 | if (reg_required_here (&str, 4) == FAIL /* Store Rd in temporary location inside instruction. */ | |
4892 | || skip_past_comma (&str) == FAIL | |
4893 | || my_get_expression (&inst.reloc.exp, &str)) | |
4894 | { | |
4895 | if (!inst.error) | |
90ca882f | 4896 | inst.error = BAD_ARGS; |
252b5132 RH |
4897 | return; |
4898 | } | |
4899 | ||
4900 | inst.reloc.type = BFD_RELOC_ARM_THUMB_ADD; | |
4901 | inst.reloc.exp.X_add_number -= 4; /* PC relative adjust */ | |
4902 | inst.reloc.pc_rel = 1; | |
4903 | inst.instruction |= REG_PC; /* Rd is already placed into the instruction */ | |
4904 | end_of_line (str); | |
4905 | } | |
4906 | ||
4907 | static void | |
4908 | insert_reg (entry) | |
4909 | int entry; | |
4910 | { | |
4911 | int len = strlen (reg_table[entry].name) + 2; | |
4912 | char * buf = (char *) xmalloc (len); | |
4913 | char * buf2 = (char *) xmalloc (len); | |
4914 | int i = 0; | |
4915 | ||
4916 | #ifdef REGISTER_PREFIX | |
4917 | buf[i++] = REGISTER_PREFIX; | |
4918 | #endif | |
4919 | ||
4920 | strcpy (buf + i, reg_table[entry].name); | |
4921 | ||
4922 | for (i = 0; buf[i]; i++) | |
4923 | buf2[i] = islower (buf[i]) ? toupper (buf[i]) : buf[i]; | |
4924 | ||
4925 | buf2[i] = '\0'; | |
4926 | ||
4927 | hash_insert (arm_reg_hsh, buf, (PTR) ®_table[entry]); | |
4928 | hash_insert (arm_reg_hsh, buf2, (PTR) ®_table[entry]); | |
4929 | } | |
4930 | ||
4931 | static void | |
4932 | insert_reg_alias (str, regnum) | |
4933 | char *str; | |
4934 | int regnum; | |
4935 | { | |
4936 | struct reg_entry *new = | |
4937 | (struct reg_entry *)xmalloc (sizeof (struct reg_entry)); | |
4938 | char *name = xmalloc (strlen (str) + 1); | |
4939 | strcpy (name, str); | |
4940 | ||
4941 | new->name = name; | |
4942 | new->number = regnum; | |
4943 | ||
4944 | hash_insert (arm_reg_hsh, name, (PTR) new); | |
4945 | } | |
4946 | ||
4947 | static void | |
4948 | set_constant_flonums () | |
4949 | { | |
4950 | int i; | |
4951 | ||
4952 | for (i = 0; i < NUM_FLOAT_VALS; i++) | |
4953 | if (atof_ieee ((char *)fp_const[i], 'x', fp_values[i]) == NULL) | |
4954 | abort (); | |
4955 | } | |
4956 | ||
4957 | void | |
4958 | md_begin () | |
4959 | { | |
4960 | int i; | |
4961 | ||
4962 | if ( (arm_ops_hsh = hash_new ()) == NULL | |
4963 | || (arm_tops_hsh = hash_new ()) == NULL | |
4964 | || (arm_cond_hsh = hash_new ()) == NULL | |
4965 | || (arm_shift_hsh = hash_new ()) == NULL | |
4966 | || (arm_reg_hsh = hash_new ()) == NULL | |
4967 | || (arm_psr_hsh = hash_new ()) == NULL) | |
4968 | as_fatal (_("Virtual memory exhausted")); | |
4969 | ||
4970 | for (i = 0; i < sizeof (insns) / sizeof (struct asm_opcode); i++) | |
4971 | hash_insert (arm_ops_hsh, insns[i].template, (PTR) (insns + i)); | |
4972 | for (i = 0; i < sizeof (tinsns) / sizeof (struct thumb_opcode); i++) | |
4973 | hash_insert (arm_tops_hsh, tinsns[i].template, (PTR) (tinsns + i)); | |
4974 | for (i = 0; i < sizeof (conds) / sizeof (struct asm_cond); i++) | |
4975 | hash_insert (arm_cond_hsh, conds[i].template, (PTR) (conds + i)); | |
4976 | for (i = 0; i < sizeof (shift) / sizeof (struct asm_shift); i++) | |
4977 | hash_insert (arm_shift_hsh, shift[i].template, (PTR) (shift + i)); | |
4978 | for (i = 0; i < sizeof (psrs) / sizeof (struct asm_psr); i++) | |
4979 | hash_insert (arm_psr_hsh, psrs[i].template, (PTR) (psrs + i)); | |
4980 | ||
4981 | for (i = 0; reg_table[i].name; i++) | |
4982 | insert_reg (i); | |
4983 | ||
4984 | set_constant_flonums (); | |
4985 | ||
4986 | #if defined OBJ_COFF || defined OBJ_ELF | |
4987 | { | |
4988 | unsigned int flags = 0; | |
4989 | ||
4990 | /* Set the flags in the private structure */ | |
4991 | if (uses_apcs_26) flags |= F_APCS26; | |
4992 | if (support_interwork) flags |= F_INTERWORK; | |
4993 | if (uses_apcs_float) flags |= F_APCS_FLOAT; | |
4994 | if (pic_code) flags |= F_PIC; | |
2f992c04 | 4995 | if ((cpu_variant & FPU_ALL) == FPU_NONE) flags |= F_SOFT_FLOAT; |
252b5132 RH |
4996 | |
4997 | bfd_set_private_flags (stdoutput, flags); | |
4998 | } | |
4999 | #endif | |
5000 | ||
5001 | { | |
5002 | unsigned mach; | |
5003 | ||
5004 | /* Record the CPU type as well */ | |
5005 | switch (cpu_variant & ARM_CPU_MASK) | |
5006 | { | |
5007 | case ARM_2: | |
5008 | mach = bfd_mach_arm_2; | |
5009 | break; | |
5010 | ||
5011 | case ARM_3: /* also ARM_250 */ | |
5012 | mach = bfd_mach_arm_2a; | |
5013 | break; | |
5014 | ||
5015 | default: | |
5016 | case ARM_6 | ARM_3 | ARM_2: /* Actually no CPU type defined */ | |
5017 | mach = bfd_mach_arm_4; | |
5018 | break; | |
5019 | ||
5020 | case ARM_7: /* also ARM_6 */ | |
5021 | mach = bfd_mach_arm_3; | |
5022 | break; | |
5023 | } | |
5024 | ||
ae5ad4ad | 5025 | /* Catch special cases. */ |
252b5132 RH |
5026 | if (cpu_variant != (FPU_DEFAULT | CPU_DEFAULT)) |
5027 | { | |
49a5575c NC |
5028 | if (cpu_variant & (ARM_EXT_V5 & ARM_THUMB)) |
5029 | mach = bfd_mach_arm_5T; | |
5030 | else if (cpu_variant & ARM_EXT_V5) | |
5031 | mach = bfd_mach_arm_5; | |
5032 | else if (cpu_variant & ARM_THUMB) | |
252b5132 | 5033 | mach = bfd_mach_arm_4T; |
49a5575c | 5034 | else if ((cpu_variant & ARM_ARCH_V4) == ARM_ARCH_V4) |
252b5132 RH |
5035 | mach = bfd_mach_arm_4; |
5036 | else if (cpu_variant & ARM_LONGMUL) | |
5037 | mach = bfd_mach_arm_3M; | |
5038 | } | |
5039 | ||
5040 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach); | |
5041 | } | |
5042 | } | |
5043 | ||
5044 | /* Turn an integer of n bytes (in val) into a stream of bytes appropriate | |
5045 | for use in the a.out file, and stores them in the array pointed to by buf. | |
5046 | This knows about the endian-ness of the target machine and does | |
5047 | THE RIGHT THING, whatever it is. Possible values for n are 1 (byte) | |
5048 | 2 (short) and 4 (long) Floating numbers are put out as a series of | |
ae5ad4ad | 5049 | LITTLENUMS (shorts, here at least). */ |
252b5132 RH |
5050 | void |
5051 | md_number_to_chars (buf, val, n) | |
5052 | char * buf; | |
5053 | valueT val; | |
5054 | int n; | |
5055 | { | |
5056 | if (target_big_endian) | |
5057 | number_to_chars_bigendian (buf, val, n); | |
5058 | else | |
5059 | number_to_chars_littleendian (buf, val, n); | |
5060 | } | |
5061 | ||
5062 | static valueT | |
5063 | md_chars_to_number (buf, n) | |
5064 | char * buf; | |
5065 | int n; | |
5066 | { | |
5067 | valueT result = 0; | |
5068 | unsigned char * where = (unsigned char *) buf; | |
5069 | ||
5070 | if (target_big_endian) | |
5071 | { | |
5072 | while (n--) | |
5073 | { | |
5074 | result <<= 8; | |
5075 | result |= (*where++ & 255); | |
5076 | } | |
5077 | } | |
5078 | else | |
5079 | { | |
5080 | while (n--) | |
5081 | { | |
5082 | result <<= 8; | |
5083 | result |= (where[n] & 255); | |
5084 | } | |
5085 | } | |
5086 | ||
5087 | return result; | |
5088 | } | |
5089 | ||
5090 | /* Turn a string in input_line_pointer into a floating point constant | |
5091 | of type TYPE, and store the appropriate bytes in *litP. The number | |
5092 | of LITTLENUMS emitted is stored in *sizeP . An error message is | |
5093 | returned, or NULL on OK. | |
5094 | ||
5095 | Note that fp constants aren't represent in the normal way on the ARM. | |
5096 | In big endian mode, things are as expected. However, in little endian | |
5097 | mode fp constants are big-endian word-wise, and little-endian byte-wise | |
5098 | within the words. For example, (double) 1.1 in big endian mode is | |
5099 | the byte sequence 3f f1 99 99 99 99 99 9a, and in little endian mode is | |
5100 | the byte sequence 99 99 f1 3f 9a 99 99 99. | |
5101 | ||
5102 | ??? The format of 12 byte floats is uncertain according to gcc's arm.h. */ | |
5103 | ||
5104 | char * | |
5105 | md_atof (type, litP, sizeP) | |
5106 | char type; | |
5107 | char * litP; | |
5108 | int * sizeP; | |
5109 | { | |
5110 | int prec; | |
5111 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
5112 | char *t; | |
5113 | int i; | |
5114 | ||
5115 | switch (type) | |
5116 | { | |
5117 | case 'f': | |
5118 | case 'F': | |
5119 | case 's': | |
5120 | case 'S': | |
5121 | prec = 2; | |
5122 | break; | |
5123 | ||
5124 | case 'd': | |
5125 | case 'D': | |
5126 | case 'r': | |
5127 | case 'R': | |
5128 | prec = 4; | |
5129 | break; | |
5130 | ||
5131 | case 'x': | |
5132 | case 'X': | |
5133 | prec = 6; | |
5134 | break; | |
5135 | ||
5136 | case 'p': | |
5137 | case 'P': | |
5138 | prec = 6; | |
5139 | break; | |
5140 | ||
5141 | default: | |
5142 | *sizeP = 0; | |
5143 | return _("Bad call to MD_ATOF()"); | |
5144 | } | |
5145 | ||
5146 | t = atof_ieee (input_line_pointer, type, words); | |
5147 | if (t) | |
5148 | input_line_pointer = t; | |
5149 | *sizeP = prec * 2; | |
5150 | ||
5151 | if (target_big_endian) | |
5152 | { | |
5153 | for (i = 0; i < prec; i++) | |
5154 | { | |
5155 | md_number_to_chars (litP, (valueT) words[i], 2); | |
5156 | litP += 2; | |
5157 | } | |
5158 | } | |
5159 | else | |
5160 | { | |
5161 | /* For a 4 byte float the order of elements in `words' is 1 0. For an | |
5162 | 8 byte float the order is 1 0 3 2. */ | |
5163 | for (i = 0; i < prec; i += 2) | |
5164 | { | |
5165 | md_number_to_chars (litP, (valueT) words[i + 1], 2); | |
5166 | md_number_to_chars (litP + 2, (valueT) words[i], 2); | |
5167 | litP += 4; | |
5168 | } | |
5169 | } | |
5170 | ||
5171 | return 0; | |
5172 | } | |
5173 | ||
661e4995 | 5174 | /* The knowledge of the PC's pipeline offset is built into the insns themselves. */ |
252b5132 RH |
5175 | long |
5176 | md_pcrel_from (fixP) | |
5177 | fixS * fixP; | |
5178 | { | |
5179 | if ( fixP->fx_addsy | |
5180 | && S_GET_SEGMENT (fixP->fx_addsy) == undefined_section | |
5181 | && fixP->fx_subsy == NULL) | |
5182 | return 0; | |
5183 | ||
5184 | if (fixP->fx_pcrel && (fixP->fx_r_type == BFD_RELOC_ARM_THUMB_ADD)) | |
5185 | { | |
5186 | /* PC relative addressing on the Thumb is slightly odd | |
5187 | as the bottom two bits of the PC are forced to zero | |
ae5ad4ad | 5188 | for the calculation. */ |
252b5132 RH |
5189 | return (fixP->fx_where + fixP->fx_frag->fr_address) & ~3; |
5190 | } | |
661e4995 | 5191 | |
252b5132 RH |
5192 | return fixP->fx_where + fixP->fx_frag->fr_address; |
5193 | } | |
5194 | ||
5195 | /* Round up a section size to the appropriate boundary. */ | |
5196 | valueT | |
5197 | md_section_align (segment, size) | |
5198 | segT segment; | |
5199 | valueT size; | |
5200 | { | |
5201 | #ifdef OBJ_ELF | |
5856c19a | 5202 | return size; |
231b5e29 | 5203 | #else |
252b5132 RH |
5204 | /* Round all sects to multiple of 4 */ |
5205 | return (size + 3) & ~3; | |
231b5e29 | 5206 | #endif |
252b5132 RH |
5207 | } |
5208 | ||
5209 | /* Under ELF we need to default _GLOBAL_OFFSET_TABLE. Otherwise | |
5210 | we have no need to default values of symbols. */ | |
5211 | ||
5212 | /* ARGSUSED */ | |
5213 | symbolS * | |
5214 | md_undefined_symbol (name) | |
5215 | char * name; | |
5216 | { | |
5217 | #ifdef OBJ_ELF | |
5218 | if (name[0] == '_' && name[1] == 'G' | |
5219 | && streq (name, GLOBAL_OFFSET_TABLE_NAME)) | |
5220 | { | |
5221 | if (!GOT_symbol) | |
5222 | { | |
5223 | if (symbol_find (name)) | |
5224 | as_bad ("GOT already in the symbol table"); | |
5225 | ||
5226 | GOT_symbol = symbol_new (name, undefined_section, | |
5227 | (valueT)0, & zero_address_frag); | |
5228 | } | |
5229 | ||
5230 | return GOT_symbol; | |
5231 | } | |
5232 | #endif | |
5233 | ||
5234 | return 0; | |
5235 | } | |
5236 | ||
5237 | /* arm_reg_parse () := if it looks like a register, return its token and | |
5238 | advance the pointer. */ | |
5239 | ||
5240 | static int | |
5241 | arm_reg_parse (ccp) | |
5242 | register char ** ccp; | |
5243 | { | |
5244 | char * start = * ccp; | |
5245 | char c; | |
5246 | char * p; | |
5247 | struct reg_entry * reg; | |
5248 | ||
5249 | #ifdef REGISTER_PREFIX | |
5250 | if (*start != REGISTER_PREFIX) | |
5251 | return FAIL; | |
5252 | p = start + 1; | |
5253 | #else | |
5254 | p = start; | |
5255 | #ifdef OPTIONAL_REGISTER_PREFIX | |
5256 | if (*p == OPTIONAL_REGISTER_PREFIX) | |
5257 | p++, start++; | |
5258 | #endif | |
5259 | #endif | |
5260 | if (!isalpha (*p) || !is_name_beginner (*p)) | |
5261 | return FAIL; | |
5262 | ||
5263 | c = *p++; | |
5264 | while (isalpha (c) || isdigit (c) || c == '_') | |
5265 | c = *p++; | |
5266 | ||
5267 | *--p = 0; | |
5268 | reg = (struct reg_entry *) hash_find (arm_reg_hsh, start); | |
5269 | *p = c; | |
5270 | ||
5271 | if (reg) | |
5272 | { | |
5273 | *ccp = p; | |
5274 | return reg->number; | |
5275 | } | |
5276 | ||
5277 | return FAIL; | |
5278 | } | |
5279 | ||
5280 | static int | |
5281 | arm_psr_parse (ccp) | |
5282 | register char ** ccp; | |
5283 | { | |
5284 | char * start = * ccp; | |
5285 | char c; | |
5286 | char * p; | |
5287 | CONST struct asm_psr * psr; | |
5288 | ||
5289 | p = start; | |
5290 | c = *p++; | |
5291 | while (isalpha (c) || c == '_') | |
5292 | c = *p++; | |
5293 | ||
5294 | *--p = 0; | |
5295 | psr = (CONST struct asm_psr *) hash_find (arm_psr_hsh, start); | |
5296 | *p = c; | |
5297 | ||
5298 | if (psr) | |
5299 | { | |
5300 | *ccp = p; | |
5301 | return psr->number; | |
5302 | } | |
5303 | ||
5304 | return FAIL; | |
5305 | } | |
5306 | ||
5307 | int | |
5308 | md_apply_fix3 (fixP, val, seg) | |
5309 | fixS * fixP; | |
5310 | valueT * val; | |
5311 | segT seg; | |
5312 | { | |
5313 | offsetT value = * val; | |
5314 | offsetT newval; | |
5315 | unsigned int newimm; | |
5316 | unsigned long temp; | |
5317 | int sign; | |
5318 | char * buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
5319 | arm_fix_data * arm_data = (arm_fix_data *) fixP->tc_fix_data; | |
5320 | ||
5321 | assert (fixP->fx_r_type < BFD_RELOC_UNUSED); | |
5322 | ||
5323 | /* Note whether this will delete the relocation. */ | |
5324 | #if 0 /* patch from REarnshaw to JDavis (disabled for the moment, since it doesn't work fully) */ | |
a77f5182 | 5325 | if ((fixP->fx_addsy == 0 || symbol_constant_p (fixP->fx_addsy)) |
252b5132 RH |
5326 | && !fixP->fx_pcrel) |
5327 | #else | |
5328 | if (fixP->fx_addsy == 0 && !fixP->fx_pcrel) | |
5329 | #endif | |
5330 | fixP->fx_done = 1; | |
5331 | ||
5332 | /* If this symbol is in a different section then we need to leave it for | |
5333 | the linker to deal with. Unfortunately, md_pcrel_from can't tell, | |
5334 | so we have to undo it's effects here. */ | |
5335 | if (fixP->fx_pcrel) | |
5336 | { | |
5337 | if (fixP->fx_addsy != NULL | |
5338 | && S_IS_DEFINED (fixP->fx_addsy) | |
5339 | && S_GET_SEGMENT (fixP->fx_addsy) != seg) | |
5340 | { | |
661e4995 | 5341 | if (target_oabi |
92a66162 DL |
5342 | && (fixP->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH |
5343 | )) | |
252b5132 RH |
5344 | value = 0; |
5345 | else | |
5346 | value += md_pcrel_from (fixP); | |
5347 | } | |
5348 | } | |
5349 | ||
ae5ad4ad | 5350 | fixP->fx_addnumber = value; /* Remember value for emit_reloc. */ |
252b5132 RH |
5351 | |
5352 | switch (fixP->fx_r_type) | |
5353 | { | |
5354 | case BFD_RELOC_ARM_IMMEDIATE: | |
5355 | newimm = validate_immediate (value); | |
5356 | temp = md_chars_to_number (buf, INSN_SIZE); | |
5357 | ||
5358 | /* If the instruction will fail, see if we can fix things up by | |
5359 | changing the opcode. */ | |
5360 | if (newimm == (unsigned int) FAIL | |
5361 | && (newimm = negate_data_op (&temp, value)) == (unsigned int) FAIL) | |
5362 | { | |
5363 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
11450271 | 5364 | _("invalid constant (%lx) after fixup"), |
3d103319 | 5365 | (unsigned long) value); |
252b5132 RH |
5366 | break; |
5367 | } | |
5368 | ||
5369 | newimm |= (temp & 0xfffff000); | |
5370 | md_number_to_chars (buf, (valueT) newimm, INSN_SIZE); | |
5371 | break; | |
5372 | ||
49a5575c NC |
5373 | case BFD_RELOC_ARM_ADRL_IMMEDIATE: |
5374 | { | |
5375 | unsigned int highpart = 0; | |
5376 | unsigned int newinsn = 0xe1a00000; /* nop */ | |
5377 | newimm = validate_immediate (value); | |
5378 | temp = md_chars_to_number (buf, INSN_SIZE); | |
5379 | ||
5380 | /* If the instruction will fail, see if we can fix things up by | |
5381 | changing the opcode. */ | |
5382 | if (newimm == (unsigned int) FAIL | |
5383 | && (newimm = negate_data_op (& temp, value)) == (unsigned int) FAIL) | |
5384 | { | |
5385 | /* No ? OK - try using two ADD instructions to generate the value. */ | |
5386 | newimm = validate_immediate_twopart (value, & highpart); | |
5387 | ||
5388 | /* Yes - then make sure that the second instruction is also an add. */ | |
5389 | if (newimm != (unsigned int) FAIL) | |
5390 | newinsn = temp; | |
5391 | /* Still No ? Try using a negated value. */ | |
5392 | else if (validate_immediate_twopart (- value, & highpart) != (unsigned int) FAIL) | |
5393 | temp = newinsn = (temp & OPCODE_MASK) | OPCODE_SUB << DATA_OP_SHIFT; | |
5394 | /* Otherwise - give up. */ | |
5395 | else | |
5396 | { | |
5397 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
11450271 | 5398 | _("Unable to compute ADRL instructions for PC offset of 0x%x"), value); |
49a5575c NC |
5399 | break; |
5400 | } | |
5401 | ||
5402 | /* Replace the first operand in the 2nd instruction (which is the PC) | |
5403 | with the destination register. We have already added in the PC in the | |
5404 | first instruction and we do not want to do it again. */ | |
5405 | newinsn &= ~ 0xf0000; | |
5406 | newinsn |= ((newinsn & 0x0f000) << 4); | |
5407 | } | |
5408 | ||
5409 | newimm |= (temp & 0xfffff000); | |
5410 | md_number_to_chars (buf, (valueT) newimm, INSN_SIZE); | |
5411 | ||
5412 | highpart |= (newinsn & 0xfffff000); | |
5413 | md_number_to_chars (buf + INSN_SIZE, (valueT) highpart, INSN_SIZE); | |
5414 | } | |
5415 | break; | |
5416 | ||
5417 | case BFD_RELOC_ARM_OFFSET_IMM: | |
252b5132 | 5418 | sign = value >= 0; |
276b1dc2 NC |
5419 | |
5420 | if (value < 0) | |
5421 | value = - value; | |
5422 | ||
5423 | if (validate_offset_imm (value, 0) == FAIL) | |
252b5132 | 5424 | { |
50f4163f NC |
5425 | as_bad_where (fixP->fx_file, fixP->fx_line, |
5426 | _("bad immediate value for offset (%ld)"), (long) value); | |
252b5132 RH |
5427 | break; |
5428 | } | |
252b5132 RH |
5429 | |
5430 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5431 | newval &= 0xff7ff000; | |
5432 | newval |= value | (sign ? INDEX_UP : 0); | |
5433 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5434 | break; | |
5435 | ||
5436 | case BFD_RELOC_ARM_OFFSET_IMM8: | |
5437 | case BFD_RELOC_ARM_HWLITERAL: | |
5438 | sign = value >= 0; | |
276b1dc2 NC |
5439 | |
5440 | if (value < 0) | |
5441 | value = - value; | |
5442 | ||
5443 | if (validate_offset_imm (value, 1) == FAIL) | |
252b5132 RH |
5444 | { |
5445 | if (fixP->fx_r_type == BFD_RELOC_ARM_HWLITERAL) | |
5446 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
11450271 | 5447 | _("invalid literal constant: pool needs to be closer")); |
252b5132 | 5448 | else |
50f4163f NC |
5449 | as_bad (_("bad immediate value for half-word offset (%ld)"), |
5450 | (long) value); | |
252b5132 RH |
5451 | break; |
5452 | } | |
5453 | ||
252b5132 RH |
5454 | newval = md_chars_to_number (buf, INSN_SIZE); |
5455 | newval &= 0xff7ff0f0; | |
3d103319 | 5456 | newval |= ((value >> 4) << 8) | (value & 0xf) | (sign ? INDEX_UP : 0); |
252b5132 RH |
5457 | md_number_to_chars (buf, newval, INSN_SIZE); |
5458 | break; | |
5459 | ||
5460 | case BFD_RELOC_ARM_LITERAL: | |
5461 | sign = value >= 0; | |
276b1dc2 | 5462 | |
252b5132 | 5463 | if (value < 0) |
276b1dc2 | 5464 | value = - value; |
252b5132 | 5465 | |
276b1dc2 | 5466 | if (validate_offset_imm (value, 0) == FAIL) |
252b5132 RH |
5467 | { |
5468 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
11450271 | 5469 | _("invalid literal constant: pool needs to be closer")); |
252b5132 RH |
5470 | break; |
5471 | } | |
5472 | ||
5473 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5474 | newval &= 0xff7ff000; | |
5475 | newval |= value | (sign ? INDEX_UP : 0); | |
5476 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5477 | break; | |
5478 | ||
5479 | case BFD_RELOC_ARM_SHIFT_IMM: | |
5480 | newval = md_chars_to_number (buf, INSN_SIZE); | |
5481 | if (((unsigned long) value) > 32 | |
5482 | || (value == 32 | |
5483 | && (((newval & 0x60) == 0) || (newval & 0x60) == 0x60))) | |
5484 | { | |
5485 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5486 | _("shift expression is too large")); | |
5487 | break; | |
5488 | } | |
5489 | ||
5490 | if (value == 0) | |
5491 | newval &= ~0x60; /* Shifts of zero must be done as lsl */ | |
5492 | else if (value == 32) | |
5493 | value = 0; | |
5494 | newval &= 0xfffff07f; | |
5495 | newval |= (value & 0x1f) << 7; | |
5496 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5497 | break; | |
5498 | ||
5499 | case BFD_RELOC_ARM_SWI: | |
5500 | if (arm_data->thumb_mode) | |
5501 | { | |
5502 | if (((unsigned long) value) > 0xff) | |
5503 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5504 | _("Invalid swi expression")); | |
5505 | newval = md_chars_to_number (buf, THUMB_SIZE) & 0xff00; | |
5506 | newval |= value; | |
5507 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5508 | } | |
5509 | else | |
5510 | { | |
5511 | if (((unsigned long) value) > 0x00ffffff) | |
5512 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5513 | _("Invalid swi expression")); | |
5514 | newval = md_chars_to_number (buf, INSN_SIZE) & 0xff000000; | |
5515 | newval |= value; | |
5516 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5517 | } | |
5518 | break; | |
5519 | ||
5520 | case BFD_RELOC_ARM_MULTI: | |
5521 | if (((unsigned long) value) > 0xffff) | |
5522 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5523 | _("Invalid expression in load/store multiple")); | |
5524 | newval = value | md_chars_to_number (buf, INSN_SIZE); | |
5525 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5526 | break; | |
5527 | ||
5528 | case BFD_RELOC_ARM_PCREL_BRANCH: | |
5529 | newval = md_chars_to_number (buf, INSN_SIZE); | |
661e4995 | 5530 | |
252b5132 | 5531 | #ifdef OBJ_ELF |
252b5132 RH |
5532 | if (! target_oabi) |
5533 | value = fixP->fx_offset; | |
252b5132 | 5534 | #endif |
661e4995 | 5535 | value = (value >> 2) & 0x00ffffff; |
252b5132 RH |
5536 | value = (value + (newval & 0x00ffffff)) & 0x00ffffff; |
5537 | newval = value | (newval & 0xff000000); | |
5538 | md_number_to_chars (buf, newval, INSN_SIZE); | |
5539 | break; | |
5540 | ||
92a66162 | 5541 | |
252b5132 RH |
5542 | case BFD_RELOC_THUMB_PCREL_BRANCH9: /* conditional branch */ |
5543 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5544 | { | |
5545 | addressT diff = (newval & 0xff) << 1; | |
5546 | if (diff & 0x100) | |
5547 | diff |= ~0xff; | |
5548 | ||
5549 | value += diff; | |
5550 | if ((value & ~0xff) && ((value & ~0xff) != ~0xff)) | |
5551 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5552 | _("Branch out of range")); | |
5553 | newval = (newval & 0xff00) | ((value & 0x1ff) >> 1); | |
5554 | } | |
5555 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5556 | break; | |
5557 | ||
5558 | case BFD_RELOC_THUMB_PCREL_BRANCH12: /* unconditional branch */ | |
5559 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5560 | { | |
5561 | addressT diff = (newval & 0x7ff) << 1; | |
5562 | if (diff & 0x800) | |
5563 | diff |= ~0x7ff; | |
5564 | ||
5565 | value += diff; | |
5566 | if ((value & ~0x7ff) && ((value & ~0x7ff) != ~0x7ff)) | |
5567 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5568 | _("Branch out of range")); | |
5569 | newval = (newval & 0xf800) | ((value & 0xfff) >> 1); | |
5570 | } | |
5571 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5572 | break; | |
5573 | ||
5574 | case BFD_RELOC_THUMB_PCREL_BRANCH23: | |
5575 | { | |
5576 | offsetT newval2; | |
5577 | addressT diff; | |
5578 | ||
5579 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5580 | newval2 = md_chars_to_number (buf + THUMB_SIZE, THUMB_SIZE); | |
5581 | diff = ((newval & 0x7ff) << 12) | ((newval2 & 0x7ff) << 1); | |
5582 | if (diff & 0x400000) | |
5583 | diff |= ~0x3fffff; | |
ae5ad4ad NC |
5584 | #ifdef OBJ_ELF |
5585 | value = fixP->fx_offset; | |
5586 | #endif | |
252b5132 RH |
5587 | value += diff; |
5588 | if ((value & ~0x3fffff) && ((value & ~0x3fffff) != ~0x3fffff)) | |
5589 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5590 | _("Branch with link out of range")); | |
5591 | ||
5592 | newval = (newval & 0xf800) | ((value & 0x7fffff) >> 12); | |
5593 | newval2 = (newval2 & 0xf800) | ((value & 0xfff) >> 1); | |
5594 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5595 | md_number_to_chars (buf + THUMB_SIZE, newval2, THUMB_SIZE); | |
5596 | } | |
5597 | break; | |
5598 | ||
5599 | case BFD_RELOC_8: | |
5600 | if (fixP->fx_done || fixP->fx_pcrel) | |
5601 | md_number_to_chars (buf, value, 1); | |
5602 | #ifdef OBJ_ELF | |
5603 | else if (!target_oabi) | |
5604 | { | |
5605 | value = fixP->fx_offset; | |
5606 | md_number_to_chars (buf, value, 1); | |
5607 | } | |
5608 | #endif | |
5609 | break; | |
5610 | ||
5611 | case BFD_RELOC_16: | |
5612 | if (fixP->fx_done || fixP->fx_pcrel) | |
5613 | md_number_to_chars (buf, value, 2); | |
5614 | #ifdef OBJ_ELF | |
5615 | else if (!target_oabi) | |
5616 | { | |
5617 | value = fixP->fx_offset; | |
5618 | md_number_to_chars (buf, value, 2); | |
5619 | } | |
5620 | #endif | |
5621 | break; | |
5622 | ||
5623 | #ifdef OBJ_ELF | |
5624 | case BFD_RELOC_ARM_GOT32: | |
5625 | case BFD_RELOC_ARM_GOTOFF: | |
5626 | md_number_to_chars (buf, 0, 4); | |
5627 | break; | |
5628 | #endif | |
5629 | ||
5630 | case BFD_RELOC_RVA: | |
5631 | case BFD_RELOC_32: | |
5632 | if (fixP->fx_done || fixP->fx_pcrel) | |
5633 | md_number_to_chars (buf, value, 4); | |
5634 | #ifdef OBJ_ELF | |
5635 | else if (!target_oabi) | |
5636 | { | |
5637 | value = fixP->fx_offset; | |
5638 | md_number_to_chars (buf, value, 4); | |
5639 | } | |
5640 | #endif | |
5641 | break; | |
5642 | ||
5643 | #ifdef OBJ_ELF | |
5644 | case BFD_RELOC_ARM_PLT32: | |
5645 | /* It appears the instruction is fully prepared at this point. */ | |
5646 | break; | |
5647 | #endif | |
5648 | ||
5649 | case BFD_RELOC_ARM_GOTPC: | |
5650 | md_number_to_chars (buf, value, 4); | |
5651 | break; | |
5652 | ||
5653 | case BFD_RELOC_ARM_CP_OFF_IMM: | |
5654 | sign = value >= 0; | |
5655 | if (value < -1023 || value > 1023 || (value & 3)) | |
5656 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5657 | _("Illegal value for co-processor offset")); | |
5658 | if (value < 0) | |
5659 | value = -value; | |
5660 | newval = md_chars_to_number (buf, INSN_SIZE) & 0xff7fff00; | |
5661 | newval |= (value >> 2) | (sign ? INDEX_UP : 0); | |
5662 | md_number_to_chars (buf, newval , INSN_SIZE); | |
5663 | break; | |
5664 | ||
5665 | case BFD_RELOC_ARM_THUMB_OFFSET: | |
5666 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5667 | /* Exactly what ranges, and where the offset is inserted depends on | |
5668 | the type of instruction, we can establish this from the top 4 bits */ | |
5669 | switch (newval >> 12) | |
5670 | { | |
5671 | case 4: /* PC load */ | |
5672 | /* Thumb PC loads are somewhat odd, bit 1 of the PC is | |
5673 | forced to zero for these loads, so we will need to round | |
5674 | up the offset if the instruction address is not word | |
5675 | aligned (since the final address produced must be, and | |
5676 | we can only describe word-aligned immediate offsets). */ | |
5677 | ||
5678 | if ((fixP->fx_frag->fr_address + fixP->fx_where + value) & 3) | |
5679 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5680 | _("Invalid offset, target not word aligned (0x%08X)"), | |
5681 | (unsigned int)(fixP->fx_frag->fr_address + fixP->fx_where + value)); | |
5682 | ||
5683 | if ((value + 2) & ~0x3fe) | |
5684 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
50f4163f | 5685 | _("Invalid offset, value too big (0x%08X)"), value); |
252b5132 RH |
5686 | |
5687 | /* Round up, since pc will be rounded down. */ | |
5688 | newval |= (value + 2) >> 2; | |
5689 | break; | |
5690 | ||
5691 | case 9: /* SP load/store */ | |
5692 | if (value & ~0x3fc) | |
5693 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
50f4163f | 5694 | _("Invalid offset, value too big (0x%08X)"), value); |
252b5132 RH |
5695 | newval |= value >> 2; |
5696 | break; | |
5697 | ||
5698 | case 6: /* Word load/store */ | |
5699 | if (value & ~0x7c) | |
5700 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
50f4163f | 5701 | _("Invalid offset, value too big (0x%08X)"), value); |
252b5132 RH |
5702 | newval |= value << 4; /* 6 - 2 */ |
5703 | break; | |
5704 | ||
5705 | case 7: /* Byte load/store */ | |
5706 | if (value & ~0x1f) | |
5707 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
50f4163f | 5708 | _("Invalid offset, value too big (0x%08X)"), value); |
252b5132 RH |
5709 | newval |= value << 6; |
5710 | break; | |
5711 | ||
5712 | case 8: /* Halfword load/store */ | |
5713 | if (value & ~0x3e) | |
5714 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
50f4163f | 5715 | _("Invalid offset, value too big (0x%08X)"), value); |
252b5132 RH |
5716 | newval |= value << 5; /* 6 - 1 */ |
5717 | break; | |
5718 | ||
5719 | default: | |
5720 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3d103319 ILT |
5721 | "Unable to process relocation for thumb opcode: %lx", |
5722 | (unsigned long) newval); | |
252b5132 RH |
5723 | break; |
5724 | } | |
5725 | md_number_to_chars (buf, newval, THUMB_SIZE); | |
5726 | break; | |
5727 | ||
5728 | case BFD_RELOC_ARM_THUMB_ADD: | |
5729 | /* This is a complicated relocation, since we use it for all of | |
5730 | the following immediate relocations: | |
5731 | 3bit ADD/SUB | |
5732 | 8bit ADD/SUB | |
5733 | 9bit ADD/SUB SP word-aligned | |
5734 | 10bit ADD PC/SP word-aligned | |
5735 | ||
5736 | The type of instruction being processed is encoded in the | |
5737 | instruction field: | |
5738 | 0x8000 SUB | |
5739 | 0x00F0 Rd | |
5740 | 0x000F Rs | |
5741 | */ | |
5742 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5743 | { | |
5744 | int rd = (newval >> 4) & 0xf; | |
5745 | int rs = newval & 0xf; | |
5746 | int subtract = newval & 0x8000; | |
5747 | ||
5748 | if (rd == REG_SP) | |
5749 | { | |
5750 | if (value & ~0x1fc) | |
5751 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5752 | _("Invalid immediate for stack address calculation")); | |
5753 | newval = subtract ? T_OPCODE_SUB_ST : T_OPCODE_ADD_ST; | |
5754 | newval |= value >> 2; | |
5755 | } | |
5756 | else if (rs == REG_PC || rs == REG_SP) | |
5757 | { | |
5758 | if (subtract || | |
5759 | value & ~0x3fc) | |
5760 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3d103319 ILT |
5761 | _("Invalid immediate for address calculation (value = 0x%08lX)"), |
5762 | (unsigned long) value); | |
252b5132 RH |
5763 | newval = (rs == REG_PC ? T_OPCODE_ADD_PC : T_OPCODE_ADD_SP); |
5764 | newval |= rd << 8; | |
5765 | newval |= value >> 2; | |
5766 | } | |
5767 | else if (rs == rd) | |
5768 | { | |
5769 | if (value & ~0xff) | |
5770 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5771 | _("Invalid 8bit immediate")); | |
5772 | newval = subtract ? T_OPCODE_SUB_I8 : T_OPCODE_ADD_I8; | |
5773 | newval |= (rd << 8) | value; | |
5774 | } | |
5775 | else | |
5776 | { | |
5777 | if (value & ~0x7) | |
5778 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
5779 | _("Invalid 3bit immediate")); | |
5780 | newval = subtract ? T_OPCODE_SUB_I3 : T_OPCODE_ADD_I3; | |
5781 | newval |= rd | (rs << 3) | (value << 6); | |
5782 | } | |
5783 | } | |
5784 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5785 | break; | |
5786 | ||
5787 | case BFD_RELOC_ARM_THUMB_IMM: | |
5788 | newval = md_chars_to_number (buf, THUMB_SIZE); | |
5789 | switch (newval >> 11) | |
5790 | { | |
5791 | case 0x04: /* 8bit immediate MOV */ | |
5792 | case 0x05: /* 8bit immediate CMP */ | |
5793 | if (value < 0 || value > 255) | |
5794 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3d103319 ILT |
5795 | _("Invalid immediate: %ld is too large"), |
5796 | (long) value); | |
252b5132 RH |
5797 | newval |= value; |
5798 | break; | |
5799 | ||
5800 | default: | |
5801 | abort (); | |
5802 | } | |
5803 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5804 | break; | |
5805 | ||
5806 | case BFD_RELOC_ARM_THUMB_SHIFT: | |
5807 | /* 5bit shift value (0..31) */ | |
5808 | if (value < 0 || value > 31) | |
5809 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
3d103319 | 5810 | _("Illegal Thumb shift value: %ld"), (long) value); |
252b5132 RH |
5811 | newval = md_chars_to_number (buf, THUMB_SIZE) & 0xf03f; |
5812 | newval |= value << 6; | |
5813 | md_number_to_chars (buf, newval , THUMB_SIZE); | |
5814 | break; | |
5815 | ||
5816 | case BFD_RELOC_VTABLE_INHERIT: | |
5817 | case BFD_RELOC_VTABLE_ENTRY: | |
5818 | fixP->fx_done = 0; | |
5819 | return 1; | |
5820 | ||
5821 | case BFD_RELOC_NONE: | |
5822 | default: | |
5823 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
11450271 | 5824 | _("Bad relocation fixup type (%d)"), fixP->fx_r_type); |
252b5132 RH |
5825 | } |
5826 | ||
5827 | return 1; | |
5828 | } | |
5829 | ||
5830 | /* Translate internal representation of relocation info to BFD target | |
5831 | format. */ | |
5832 | arelent * | |
5833 | tc_gen_reloc (section, fixp) | |
5834 | asection * section; | |
5835 | fixS * fixp; | |
5836 | { | |
5837 | arelent * reloc; | |
5838 | bfd_reloc_code_real_type code; | |
5839 | ||
5840 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
5841 | ||
174419c1 ILT |
5842 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
5843 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
252b5132 RH |
5844 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
5845 | ||
5846 | /* @@ Why fx_addnumber sometimes and fx_offset other times? */ | |
5847 | #ifndef OBJ_ELF | |
5848 | if (fixp->fx_pcrel == 0) | |
5849 | reloc->addend = fixp->fx_offset; | |
5850 | else | |
5851 | reloc->addend = fixp->fx_offset = reloc->address; | |
5852 | #else /* OBJ_ELF */ | |
5853 | reloc->addend = fixp->fx_offset; | |
5854 | #endif | |
5855 | ||
5856 | switch (fixp->fx_r_type) | |
5857 | { | |
5858 | case BFD_RELOC_8: | |
5859 | if (fixp->fx_pcrel) | |
5860 | { | |
5861 | code = BFD_RELOC_8_PCREL; | |
5862 | break; | |
5863 | } | |
5864 | ||
5865 | case BFD_RELOC_16: | |
5866 | if (fixp->fx_pcrel) | |
5867 | { | |
5868 | code = BFD_RELOC_16_PCREL; | |
5869 | break; | |
5870 | } | |
5871 | ||
5872 | case BFD_RELOC_32: | |
5873 | if (fixp->fx_pcrel) | |
5874 | { | |
5875 | code = BFD_RELOC_32_PCREL; | |
5876 | break; | |
5877 | } | |
5878 | ||
5879 | case BFD_RELOC_ARM_PCREL_BRANCH: | |
5880 | case BFD_RELOC_RVA: | |
5881 | case BFD_RELOC_THUMB_PCREL_BRANCH9: | |
5882 | case BFD_RELOC_THUMB_PCREL_BRANCH12: | |
5883 | case BFD_RELOC_THUMB_PCREL_BRANCH23: | |
5884 | case BFD_RELOC_VTABLE_ENTRY: | |
5885 | case BFD_RELOC_VTABLE_INHERIT: | |
5886 | code = fixp->fx_r_type; | |
5887 | break; | |
5888 | ||
5889 | case BFD_RELOC_ARM_LITERAL: | |
5890 | case BFD_RELOC_ARM_HWLITERAL: | |
5891 | /* If this is called then the a literal has been referenced across | |
2f992c04 | 5892 | a section boundary - possibly due to an implicit dump */ |
252b5132 | 5893 | as_bad_where (fixp->fx_file, fixp->fx_line, |
2f992c04 | 5894 | _("Literal referenced across section boundary (Implicit dump?)")); |
252b5132 RH |
5895 | return NULL; |
5896 | ||
252b5132 RH |
5897 | #ifdef OBJ_ELF |
5898 | case BFD_RELOC_ARM_GOT32: | |
5899 | case BFD_RELOC_ARM_GOTOFF: | |
5900 | case BFD_RELOC_ARM_PLT32: | |
5901 | code = fixp->fx_r_type; | |
5902 | break; | |
5903 | #endif | |
5904 | ||
5905 | case BFD_RELOC_ARM_IMMEDIATE: | |
5906 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5907 | _("Internal_relocation (type %d) not fixed up (IMMEDIATE)"), | |
5908 | fixp->fx_r_type); | |
5909 | return NULL; | |
5910 | ||
49a5575c NC |
5911 | case BFD_RELOC_ARM_ADRL_IMMEDIATE: |
5912 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5913 | _("ADRL used for a symbol not defined in the same file"), | |
5914 | fixp->fx_r_type); | |
5915 | return NULL; | |
5916 | ||
252b5132 RH |
5917 | case BFD_RELOC_ARM_OFFSET_IMM: |
5918 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5919 | _("Internal_relocation (type %d) not fixed up (OFFSET_IMM)"), | |
5920 | fixp->fx_r_type); | |
5921 | return NULL; | |
5922 | ||
5923 | default: | |
5924 | { | |
5925 | char * type; | |
5926 | switch (fixp->fx_r_type) | |
5927 | { | |
5928 | case BFD_RELOC_ARM_IMMEDIATE: type = "IMMEDIATE"; break; | |
5929 | case BFD_RELOC_ARM_OFFSET_IMM: type = "OFFSET_IMM"; break; | |
5930 | case BFD_RELOC_ARM_OFFSET_IMM8: type = "OFFSET_IMM8"; break; | |
5931 | case BFD_RELOC_ARM_SHIFT_IMM: type = "SHIFT_IMM"; break; | |
5932 | case BFD_RELOC_ARM_SWI: type = "SWI"; break; | |
5933 | case BFD_RELOC_ARM_MULTI: type = "MULTI"; break; | |
5934 | case BFD_RELOC_ARM_CP_OFF_IMM: type = "CP_OFF_IMM"; break; | |
5935 | case BFD_RELOC_ARM_THUMB_ADD: type = "THUMB_ADD"; break; | |
5936 | case BFD_RELOC_ARM_THUMB_SHIFT: type = "THUMB_SHIFT"; break; | |
5937 | case BFD_RELOC_ARM_THUMB_IMM: type = "THUMB_IMM"; break; | |
5938 | case BFD_RELOC_ARM_THUMB_OFFSET: type = "THUMB_OFFSET"; break; | |
ae5ad4ad | 5939 | default: type = _("<unknown>"); break; |
252b5132 RH |
5940 | } |
5941 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5942 | _("Can not represent %s relocation in this object file format (%d)"), | |
5943 | type, fixp->fx_pcrel); | |
5944 | return NULL; | |
5945 | } | |
5946 | } | |
5947 | ||
5948 | #ifdef OBJ_ELF | |
5949 | if (code == BFD_RELOC_32_PCREL | |
5950 | && GOT_symbol | |
5951 | && fixp->fx_addsy == GOT_symbol) | |
a8aed0fb UD |
5952 | { |
5953 | code = BFD_RELOC_ARM_GOTPC; | |
5954 | reloc->addend = fixp->fx_offset = reloc->address; | |
5955 | } | |
252b5132 RH |
5956 | #endif |
5957 | ||
5958 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); | |
5959 | ||
5960 | if (reloc->howto == NULL) | |
5961 | { | |
5962 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
5963 | _("Can not represent %s relocation in this object file format"), | |
5964 | bfd_get_reloc_code_name (code)); | |
5965 | return NULL; | |
5966 | } | |
5967 | ||
c8d259f7 CM |
5968 | /* HACK: Since arm ELF uses Rel instead of Rela, encode the |
5969 | vtable entry to be used in the relocation's section offset. */ | |
5970 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
5971 | reloc->address = fixp->fx_offset; | |
5972 | ||
252b5132 RH |
5973 | return reloc; |
5974 | } | |
5975 | ||
5976 | int | |
5977 | md_estimate_size_before_relax (fragP, segtype) | |
5978 | fragS * fragP; | |
5979 | segT segtype; | |
5980 | { | |
5981 | as_fatal (_("md_estimate_size_before_relax\n")); | |
5982 | return 1; | |
5983 | } | |
5984 | ||
5985 | static void | |
49a5575c | 5986 | output_inst PARAMS ((void)) |
252b5132 RH |
5987 | { |
5988 | char * to = NULL; | |
5989 | ||
5990 | if (inst.error) | |
5991 | { | |
5992 | as_bad (inst.error); | |
5993 | return; | |
5994 | } | |
5995 | ||
5996 | to = frag_more (inst.size); | |
ae5ad4ad | 5997 | |
252b5132 RH |
5998 | if (thumb_mode && (inst.size > THUMB_SIZE)) |
5999 | { | |
6000 | assert (inst.size == (2 * THUMB_SIZE)); | |
6001 | md_number_to_chars (to, inst.instruction >> 16, THUMB_SIZE); | |
49a5575c NC |
6002 | md_number_to_chars (to + THUMB_SIZE, inst.instruction, THUMB_SIZE); |
6003 | } | |
6004 | else if (inst.size > INSN_SIZE) | |
6005 | { | |
6006 | assert (inst.size == (2 * INSN_SIZE)); | |
6007 | md_number_to_chars (to, inst.instruction, INSN_SIZE); | |
6008 | md_number_to_chars (to + INSN_SIZE, inst.instruction, INSN_SIZE); | |
252b5132 RH |
6009 | } |
6010 | else | |
6011 | md_number_to_chars (to, inst.instruction, inst.size); | |
6012 | ||
6013 | if (inst.reloc.type != BFD_RELOC_NONE) | |
6014 | fix_new_arm (frag_now, to - frag_now->fr_literal, | |
6015 | inst.size, & inst.reloc.exp, inst.reloc.pc_rel, | |
6016 | inst.reloc.type); | |
6017 | ||
6018 | return; | |
6019 | } | |
6020 | ||
6021 | void | |
6022 | md_assemble (str) | |
6023 | char * str; | |
6024 | { | |
6025 | char c; | |
6026 | char * p; | |
6027 | char * q; | |
6028 | char * start; | |
6029 | ||
6030 | /* Align the instruction. | |
6031 | This may not be the right thing to do but ... */ | |
6032 | /* arm_align (2, 0); */ | |
6033 | listing_prev_line (); /* Defined in listing.h */ | |
6034 | ||
6035 | /* Align the previous label if needed. */ | |
6036 | if (last_label_seen != NULL) | |
6037 | { | |
174419c1 | 6038 | symbol_set_frag (last_label_seen, frag_now); |
252b5132 RH |
6039 | S_SET_VALUE (last_label_seen, (valueT) frag_now_fix ()); |
6040 | S_SET_SEGMENT (last_label_seen, now_seg); | |
6041 | } | |
6042 | ||
6043 | memset (&inst, '\0', sizeof (inst)); | |
6044 | inst.reloc.type = BFD_RELOC_NONE; | |
6045 | ||
ae5ad4ad | 6046 | skip_whitespace (str); |
49a5575c | 6047 | |
252b5132 RH |
6048 | /* Scan up to the end of the op-code, which must end in white space or |
6049 | end of string. */ | |
6050 | for (start = p = str; *p != '\0'; p++) | |
6051 | if (*p == ' ') | |
6052 | break; | |
6053 | ||
6054 | if (p == str) | |
6055 | { | |
6056 | as_bad (_("No operator -- statement `%s'\n"), str); | |
6057 | return; | |
6058 | } | |
6059 | ||
6060 | if (thumb_mode) | |
6061 | { | |
49a5575c | 6062 | CONST struct thumb_opcode * opcode; |
252b5132 RH |
6063 | |
6064 | c = *p; | |
6065 | *p = '\0'; | |
6066 | opcode = (CONST struct thumb_opcode *) hash_find (arm_tops_hsh, str); | |
6067 | *p = c; | |
49a5575c | 6068 | |
252b5132 RH |
6069 | if (opcode) |
6070 | { | |
92a66162 | 6071 | /* Check that this instruction is supported for this CPU. */ |
a64bcdd8 | 6072 | if (thumb_mode == 1 && (opcode->variants & cpu_variant) == 0) |
92a66162 DL |
6073 | { |
6074 | as_bad (_("selected processor does not support this opcode")); | |
6075 | return; | |
6076 | } | |
6077 | ||
252b5132 RH |
6078 | inst.instruction = opcode->value; |
6079 | inst.size = opcode->size; | |
6080 | (*opcode->parms)(p); | |
49a5575c | 6081 | output_inst (); |
252b5132 RH |
6082 | return; |
6083 | } | |
6084 | } | |
6085 | else | |
6086 | { | |
49a5575c | 6087 | CONST struct asm_opcode * opcode; |
92a66162 | 6088 | unsigned long cond_code; |
252b5132 RH |
6089 | |
6090 | inst.size = INSN_SIZE; | |
6091 | /* p now points to the end of the opcode, probably white space, but we | |
6092 | have to break the opcode up in case it contains condionals and flags; | |
6093 | keep trying with progressively smaller basic instructions until one | |
ae5ad4ad | 6094 | matches, or we run out of opcode. */ |
252b5132 RH |
6095 | q = (p - str > LONGEST_INST) ? str + LONGEST_INST : p; |
6096 | for (; q != str; q--) | |
6097 | { | |
6098 | c = *q; | |
6099 | *q = '\0'; | |
6100 | opcode = (CONST struct asm_opcode *) hash_find (arm_ops_hsh, str); | |
6101 | *q = c; | |
49a5575c | 6102 | |
252b5132 RH |
6103 | if (opcode && opcode->template) |
6104 | { | |
6105 | unsigned long flag_bits = 0; | |
49a5575c | 6106 | char * r; |
252b5132 | 6107 | |
ae5ad4ad | 6108 | /* Check that this instruction is supported for this CPU. */ |
252b5132 RH |
6109 | if ((opcode->variants & cpu_variant) == 0) |
6110 | goto try_shorter; | |
6111 | ||
6112 | inst.instruction = opcode->value; | |
ae5ad4ad | 6113 | if (q == p) /* Just a simple opcode. */ |
252b5132 | 6114 | { |
92a66162 DL |
6115 | if (opcode->comp_suffix) |
6116 | { | |
6117 | if (*opcode->comp_suffix != '\0') | |
6118 | as_bad (_("Opcode `%s' must have suffix from <%s>\n"), | |
6119 | str, opcode->comp_suffix); | |
6120 | else | |
6121 | /* Not a conditional instruction. */ | |
6122 | (*opcode->parms)(q, 0); | |
6123 | } | |
252b5132 RH |
6124 | else |
6125 | { | |
92a66162 | 6126 | /* A conditional instruction with default condition. */ |
252b5132 RH |
6127 | inst.instruction |= COND_ALWAYS; |
6128 | (*opcode->parms)(q, 0); | |
6129 | } | |
49a5575c | 6130 | output_inst (); |
252b5132 RH |
6131 | return; |
6132 | } | |
6133 | ||
92a66162 | 6134 | /* Not just a simple opcode. Check if extra is a conditional. */ |
252b5132 RH |
6135 | r = q; |
6136 | if (p - r >= 2) | |
6137 | { | |
6138 | CONST struct asm_cond *cond; | |
6139 | char d = *(r + 2); | |
6140 | ||
6141 | *(r + 2) = '\0'; | |
6142 | cond = (CONST struct asm_cond *) hash_find (arm_cond_hsh, r); | |
6143 | *(r + 2) = d; | |
6144 | if (cond) | |
6145 | { | |
6146 | if (cond->value == 0xf0000000) | |
6147 | as_tsktsk ( | |
6148 | _("Warning: Use of the 'nv' conditional is deprecated\n")); | |
6149 | ||
92a66162 | 6150 | cond_code = cond->value; |
252b5132 RH |
6151 | r += 2; |
6152 | } | |
6153 | else | |
92a66162 | 6154 | cond_code = COND_ALWAYS; |
252b5132 RH |
6155 | } |
6156 | else | |
92a66162 DL |
6157 | cond_code = COND_ALWAYS; |
6158 | ||
6159 | ||
6160 | /* Apply the conditional, or complain it's not allowed. */ | |
6161 | if (opcode->comp_suffix && *opcode->comp_suffix == '\0') | |
6162 | { | |
6163 | /* Instruction isn't conditional */ | |
6164 | if (cond_code != COND_ALWAYS) | |
6165 | { | |
6166 | as_bad (_("Opcode `%s' is unconditional\n"), str); | |
6167 | return; | |
6168 | } | |
6169 | } | |
6170 | else | |
6171 | /* Instruction is conditional: set the condition into it. */ | |
6172 | inst.instruction |= cond_code; | |
6173 | ||
252b5132 | 6174 | |
ae5ad4ad NC |
6175 | /* If there is a compulsory suffix, it should come here, before |
6176 | any optional flags. */ | |
92a66162 | 6177 | if (opcode->comp_suffix && *opcode->comp_suffix != '\0') |
252b5132 RH |
6178 | { |
6179 | CONST char *s = opcode->comp_suffix; | |
6180 | ||
6181 | while (*s) | |
6182 | { | |
6183 | inst.suffix++; | |
6184 | if (*r == *s) | |
6185 | break; | |
6186 | s++; | |
6187 | } | |
6188 | ||
6189 | if (*s == '\0') | |
6190 | { | |
6191 | as_bad (_("Opcode `%s' must have suffix from <%s>\n"), str, | |
6192 | opcode->comp_suffix); | |
6193 | return; | |
6194 | } | |
6195 | ||
6196 | r++; | |
6197 | } | |
6198 | ||
6199 | /* The remainder, if any should now be flags for the instruction; | |
6200 | Scan these checking each one found with the opcode. */ | |
6201 | if (r != p) | |
6202 | { | |
6203 | char d; | |
6204 | CONST struct asm_flg *flag = opcode->flags; | |
6205 | ||
6206 | if (flag) | |
6207 | { | |
6208 | int flagno; | |
6209 | ||
6210 | d = *p; | |
6211 | *p = '\0'; | |
6212 | ||
6213 | for (flagno = 0; flag[flagno].template; flagno++) | |
6214 | { | |
6215 | if (streq (r, flag[flagno].template)) | |
6216 | { | |
6217 | flag_bits |= flag[flagno].set_bits; | |
6218 | break; | |
6219 | } | |
6220 | } | |
6221 | ||
6222 | *p = d; | |
6223 | if (! flag[flagno].template) | |
6224 | goto try_shorter; | |
6225 | } | |
6226 | else | |
6227 | goto try_shorter; | |
6228 | } | |
6229 | ||
6230 | (*opcode->parms) (p, flag_bits); | |
49a5575c | 6231 | output_inst (); |
252b5132 RH |
6232 | return; |
6233 | } | |
6234 | ||
6235 | try_shorter: | |
6236 | ; | |
6237 | } | |
6238 | } | |
6239 | ||
6240 | /* It wasn't an instruction, but it might be a register alias of the form | |
ae5ad4ad | 6241 | alias .req reg */ |
252b5132 | 6242 | q = p; |
ae5ad4ad | 6243 | skip_whitespace (q); |
252b5132 RH |
6244 | |
6245 | c = *p; | |
6246 | *p = '\0'; | |
6247 | ||
6248 | if (*q && !strncmp (q, ".req ", 4)) | |
6249 | { | |
6250 | int reg; | |
6251 | char * copy_of_str = str; | |
6252 | char * r; | |
6253 | ||
6254 | q += 4; | |
ae5ad4ad | 6255 | skip_whitespace (q); |
252b5132 RH |
6256 | |
6257 | for (r = q; *r != '\0'; r++) | |
6258 | if (*r == ' ') | |
6259 | break; | |
6260 | ||
6261 | if (r != q) | |
6262 | { | |
6263 | int regnum; | |
6264 | char d = *r; | |
6265 | ||
6266 | *r = '\0'; | |
6267 | regnum = arm_reg_parse (& q); | |
6268 | *r = d; | |
6269 | ||
6270 | reg = arm_reg_parse (& str); | |
6271 | ||
6272 | if (reg == FAIL) | |
6273 | { | |
6274 | if (regnum != FAIL) | |
11450271 | 6275 | insert_reg_alias (str, regnum); |
252b5132 | 6276 | else |
92a66162 | 6277 | as_warn (_("register '%s' does not exist\n"), q); |
252b5132 RH |
6278 | } |
6279 | else if (regnum != FAIL) | |
6280 | { | |
6281 | if (reg != regnum) | |
6282 | as_warn (_("ignoring redefinition of register alias '%s'"), copy_of_str ); | |
6283 | ||
ae5ad4ad | 6284 | /* Do not warn about redefinitions to the same alias. */ |
252b5132 RH |
6285 | } |
6286 | else | |
6287 | as_warn (_("ignoring redefinition of register alias '%s' to non-existant register '%s'"), | |
6288 | copy_of_str, q); | |
6289 | } | |
6290 | else | |
6291 | as_warn (_("ignoring incomplete .req pseuso op")); | |
6292 | ||
6293 | *p = c; | |
6294 | return; | |
6295 | } | |
6296 | ||
6297 | *p = c; | |
6298 | as_bad (_("bad instruction `%s'"), start); | |
6299 | } | |
6300 | ||
6301 | /* | |
6302 | * md_parse_option | |
6303 | * Invocation line includes a switch not recognized by the base assembler. | |
6304 | * See if it's a processor-specific option. These are: | |
6305 | * Cpu variants, the arm part is optional: | |
6306 | * -m[arm]1 Currently not supported. | |
6307 | * -m[arm]2, -m[arm]250 Arm 2 and Arm 250 processor | |
6308 | * -m[arm]3 Arm 3 processor | |
6309 | * -m[arm]6[xx], Arm 6 processors | |
6310 | * -m[arm]7[xx][t][[d]m] Arm 7 processors | |
49a5575c NC |
6311 | * -m[arm]8[10] Arm 8 processors |
6312 | * -m[arm]9[20][tdmi] Arm 9 processors | |
c1d3c45e | 6313 | * -mstrongarm[110[0]] StrongARM processors |
92a66162 | 6314 | * -m[arm]v[2345] Arm architectures |
252b5132 RH |
6315 | * -mall All (except the ARM1) |
6316 | * FP variants: | |
6317 | * -mfpa10, -mfpa11 FPA10 and 11 co-processor instructions | |
6318 | * -mfpe-old (No float load/store multiples) | |
6319 | * -mno-fpu Disable all floating point instructions | |
6320 | * Run-time endian selection: | |
6321 | * -EB big endian cpu | |
6322 | * -EL little endian cpu | |
6323 | * ARM Procedure Calling Standard: | |
6324 | * -mapcs-32 32 bit APCS | |
6325 | * -mapcs-26 26 bit APCS | |
6326 | * -mapcs-float Pass floats in float regs | |
6327 | * -mapcs-reentrant Position independent code | |
6328 | * -mthumb-interwork Code supports Arm/Thumb interworking | |
6329 | * -moabi Old ELF ABI | |
6330 | */ | |
6331 | ||
6332 | CONST char * md_shortopts = "m:k"; | |
6333 | struct option md_longopts[] = | |
6334 | { | |
6335 | #ifdef ARM_BI_ENDIAN | |
6336 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
6337 | {"EB", no_argument, NULL, OPTION_EB}, | |
6338 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
6339 | {"EL", no_argument, NULL, OPTION_EL}, | |
6340 | #ifdef OBJ_ELF | |
6341 | #define OPTION_OABI (OPTION_MD_BASE +2) | |
6342 | {"oabi", no_argument, NULL, OPTION_OABI}, | |
6343 | #endif | |
6344 | #endif | |
6345 | {NULL, no_argument, NULL, 0} | |
6346 | }; | |
6347 | size_t md_longopts_size = sizeof (md_longopts); | |
6348 | ||
6349 | int | |
6350 | md_parse_option (c, arg) | |
6351 | int c; | |
6352 | char * arg; | |
6353 | { | |
6354 | char * str = arg; | |
6355 | ||
6356 | switch (c) | |
6357 | { | |
6358 | #ifdef ARM_BI_ENDIAN | |
6359 | case OPTION_EB: | |
6360 | target_big_endian = 1; | |
6361 | break; | |
6362 | case OPTION_EL: | |
6363 | target_big_endian = 0; | |
6364 | break; | |
6365 | #endif | |
6366 | ||
6367 | case 'm': | |
6368 | switch (*str) | |
6369 | { | |
6370 | case 'f': | |
6371 | if (streq (str, "fpa10")) | |
6372 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA10; | |
6373 | else if (streq (str, "fpa11")) | |
6374 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_FPA11; | |
6375 | else if (streq (str, "fpe-old")) | |
6376 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_CORE; | |
6377 | else | |
6378 | goto bad; | |
6379 | break; | |
6380 | ||
6381 | case 'n': | |
6382 | if (streq (str, "no-fpu")) | |
6383 | cpu_variant &= ~FPU_ALL; | |
6384 | break; | |
6385 | ||
6386 | #ifdef OBJ_ELF | |
6387 | case 'o': | |
6388 | if (streq (str, "oabi")) | |
6389 | target_oabi = true; | |
6390 | break; | |
6391 | #endif | |
6392 | ||
6393 | case 't': | |
6394 | /* Limit assembler to generating only Thumb instructions: */ | |
6395 | if (streq (str, "thumb")) | |
6396 | { | |
6397 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_THUMB; | |
6398 | cpu_variant = (cpu_variant & ~FPU_ALL) | FPU_NONE; | |
6399 | thumb_mode = 1; | |
6400 | } | |
6401 | else if (streq (str, "thumb-interwork")) | |
6402 | { | |
49a5575c | 6403 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_THUMB | ARM_ARCH_V4; |
252b5132 RH |
6404 | #if defined OBJ_COFF || defined OBJ_ELF |
6405 | support_interwork = true; | |
6406 | #endif | |
6407 | } | |
6408 | else | |
6409 | goto bad; | |
6410 | break; | |
6411 | ||
6412 | default: | |
6413 | if (streq (str, "all")) | |
6414 | { | |
6415 | cpu_variant = ARM_ALL | FPU_ALL; | |
6416 | return 1; | |
6417 | } | |
6418 | #if defined OBJ_COFF || defined OBJ_ELF | |
6419 | if (! strncmp (str, "apcs-", 5)) | |
6420 | { | |
6421 | /* GCC passes on all command line options starting "-mapcs-..." | |
6422 | to us, so we must parse them here. */ | |
6423 | ||
6424 | str += 5; | |
6425 | ||
6426 | if (streq (str, "32")) | |
6427 | { | |
6428 | uses_apcs_26 = false; | |
6429 | return 1; | |
6430 | } | |
6431 | else if (streq (str, "26")) | |
6432 | { | |
6433 | uses_apcs_26 = true; | |
6434 | return 1; | |
6435 | } | |
6436 | else if (streq (str, "frame")) | |
6437 | { | |
6438 | /* Stack frames are being generated - does not affect | |
6439 | linkage of code. */ | |
6440 | return 1; | |
6441 | } | |
6442 | else if (streq (str, "stack-check")) | |
6443 | { | |
6444 | /* Stack checking is being performed - does not affect | |
6445 | linkage, but does require that the functions | |
6446 | __rt_stkovf_split_small and __rt_stkovf_split_big be | |
6447 | present in the final link. */ | |
6448 | ||
6449 | return 1; | |
6450 | } | |
6451 | else if (streq (str, "float")) | |
6452 | { | |
6453 | /* Floating point arguments are being passed in the floating | |
6454 | point registers. This does affect linking, since this | |
6455 | version of the APCS is incompatible with the version that | |
6456 | passes floating points in the integer registers. */ | |
6457 | ||
6458 | uses_apcs_float = true; | |
6459 | return 1; | |
6460 | } | |
6461 | else if (streq (str, "reentrant")) | |
6462 | { | |
6463 | /* Reentrant code has been generated. This does affect | |
6464 | linking, since there is no point in linking reentrant/ | |
6465 | position independent code with absolute position code. */ | |
6466 | pic_code = true; | |
6467 | return 1; | |
6468 | } | |
6469 | ||
6470 | as_bad (_("Unrecognised APCS switch -m%s"), arg); | |
6471 | return 0; | |
6472 | } | |
6473 | #endif | |
6474 | /* Strip off optional "arm" */ | |
6475 | if (! strncmp (str, "arm", 3)) | |
6476 | str += 3; | |
6477 | ||
6478 | switch (*str) | |
6479 | { | |
6480 | case '1': | |
6481 | if (streq (str, "1")) | |
6482 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_1; | |
6483 | else | |
6484 | goto bad; | |
6485 | break; | |
6486 | ||
6487 | case '2': | |
6488 | if (streq (str, "2")) | |
6489 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; | |
6490 | else if (streq (str, "250")) | |
6491 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_250; | |
6492 | else | |
6493 | goto bad; | |
6494 | break; | |
6495 | ||
6496 | case '3': | |
6497 | if (streq (str, "3")) | |
6498 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; | |
6499 | else | |
6500 | goto bad; | |
6501 | break; | |
6502 | ||
6503 | case '6': | |
6504 | switch (strtol (str, NULL, 10)) | |
6505 | { | |
6506 | case 6: | |
6507 | case 60: | |
6508 | case 600: | |
6509 | case 610: | |
6510 | case 620: | |
6511 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_6; | |
6512 | break; | |
6513 | default: | |
6514 | goto bad; | |
6515 | } | |
6516 | break; | |
6517 | ||
6518 | case '7': | |
6519 | switch (strtol (str, & str, 10)) /* Eat the processor name */ | |
6520 | { | |
6521 | case 7: | |
6522 | case 70: | |
6523 | case 700: | |
6524 | case 710: | |
6525 | case 7100: | |
6526 | case 7500: | |
6527 | break; | |
6528 | default: | |
6529 | goto bad; | |
6530 | } | |
6531 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; | |
6532 | for (; *str; str++) | |
6533 | { | |
6534 | switch (* str) | |
6535 | { | |
6536 | case 't': | |
49a5575c | 6537 | cpu_variant |= (ARM_THUMB | ARM_ARCH_V4); |
252b5132 RH |
6538 | break; |
6539 | ||
6540 | case 'm': | |
6541 | cpu_variant |= ARM_LONGMUL; | |
6542 | break; | |
6543 | ||
6544 | case 'f': /* fe => fp enabled cpu. */ | |
6545 | if (str[1] == 'e') | |
6546 | ++ str; | |
6547 | else | |
6548 | goto bad; | |
6549 | ||
6550 | case 'c': /* Left over from 710c processor name. */ | |
6551 | case 'd': /* Debug */ | |
6552 | case 'i': /* Embedded ICE */ | |
6553 | /* Included for completeness in ARM processor naming. */ | |
6554 | break; | |
6555 | ||
6556 | default: | |
6557 | goto bad; | |
6558 | } | |
6559 | } | |
6560 | break; | |
6561 | ||
6562 | case '8': | |
6563 | if (streq (str, "8") || streq (str, "810")) | |
49a5575c | 6564 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCH_V4 | ARM_LONGMUL; |
252b5132 RH |
6565 | else |
6566 | goto bad; | |
6567 | break; | |
6568 | ||
6569 | case '9': | |
6570 | if (streq (str, "9")) | |
49a5575c | 6571 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; |
c1d3c45e | 6572 | else if (streq (str, "920")) |
49a5575c | 6573 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL; |
c1d3c45e | 6574 | else if (streq (str, "920t")) |
49a5575c | 6575 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; |
252b5132 | 6576 | else if (streq (str, "9tdmi")) |
49a5575c | 6577 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_9 | ARM_ARCH_V4 | ARM_LONGMUL | ARM_THUMB; |
252b5132 RH |
6578 | else |
6579 | goto bad; | |
6580 | break; | |
92a66162 | 6581 | |
252b5132 RH |
6582 | |
6583 | case 's': | |
6584 | if (streq (str, "strongarm") | |
6585 | || streq (str, "strongarm110") | |
6586 | || streq (str, "strongarm1100")) | |
49a5575c | 6587 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_8 | ARM_ARCH_V4 | ARM_LONGMUL; |
252b5132 RH |
6588 | else |
6589 | goto bad; | |
6590 | break; | |
6591 | ||
6592 | case 'v': | |
6593 | /* Select variant based on architecture rather than processor */ | |
6594 | switch (*++str) | |
6595 | { | |
6596 | case '2': | |
6597 | switch (*++str) | |
6598 | { | |
6599 | case 'a': cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_3; break; | |
6600 | case 0: cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_2; break; | |
6601 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6602 | } | |
6603 | break; | |
6604 | ||
6605 | case '3': | |
6606 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_7; | |
6607 | ||
6608 | switch (*++str) | |
6609 | { | |
6610 | case 'm': cpu_variant |= ARM_LONGMUL; break; | |
6611 | case 0: break; | |
6612 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6613 | } | |
6614 | break; | |
6615 | ||
6616 | case '4': | |
49a5575c NC |
6617 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V4; |
6618 | ||
6619 | switch (*++str) | |
6620 | { | |
6621 | case 't': cpu_variant |= ARM_THUMB; break; | |
6622 | case 0: break; | |
6623 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6624 | } | |
6625 | break; | |
92a66162 | 6626 | |
49a5575c NC |
6627 | case '5': |
6628 | cpu_variant = (cpu_variant & ~ARM_ANY) | ARM_ARCH_V5; | |
252b5132 RH |
6629 | switch (*++str) |
6630 | { | |
6631 | case 't': cpu_variant |= ARM_THUMB; break; | |
92a66162 | 6632 | case 'e': cpu_variant |= ARM_EXT_V5E; break; |
252b5132 RH |
6633 | case 0: break; |
6634 | default: as_bad (_("Invalid architecture variant -m%s"), arg); break; | |
6635 | } | |
6636 | break; | |
92a66162 | 6637 | |
252b5132 RH |
6638 | |
6639 | default: | |
6640 | as_bad (_("Invalid architecture variant -m%s"), arg); | |
6641 | break; | |
6642 | } | |
6643 | break; | |
6644 | ||
6645 | default: | |
6646 | bad: | |
6647 | as_bad (_("Invalid processor variant -m%s"), arg); | |
6648 | return 0; | |
6649 | } | |
6650 | } | |
6651 | break; | |
6652 | ||
325188ec | 6653 | #if defined OBJ_ELF || defined OBJ_COFF |
252b5132 RH |
6654 | case 'k': |
6655 | pic_code = 1; | |
6656 | break; | |
325188ec | 6657 | #endif |
252b5132 RH |
6658 | |
6659 | default: | |
6660 | return 0; | |
6661 | } | |
6662 | ||
6663 | return 1; | |
6664 | } | |
6665 | ||
6666 | void | |
6667 | md_show_usage (fp) | |
6668 | FILE * fp; | |
6669 | { | |
6670 | fprintf (fp, | |
6671 | _("\ | |
6672 | ARM Specific Assembler Options:\n\ | |
6673 | -m[arm][<processor name>] select processor variant\n\ | |
49a5575c | 6674 | -m[arm]v[2|2a|3|3m|4|4t|5]select architecture variant\n\ |
252b5132 RH |
6675 | -mthumb only allow Thumb instructions\n\ |
6676 | -mthumb-interwork mark the assembled code as supporting interworking\n\ | |
6677 | -mall allow any instruction\n\ | |
6678 | -mfpa10, -mfpa11 select floating point architecture\n\ | |
6679 | -mfpe-old don't allow floating-point multiple instructions\n\ | |
6680 | -mno-fpu don't allow any floating-point instructions.\n")); | |
6681 | fprintf (fp, | |
6682 | _("\ | |
6683 | -k generate PIC code.\n")); | |
6684 | #if defined OBJ_COFF || defined OBJ_ELF | |
6685 | fprintf (fp, | |
6686 | _("\ | |
6687 | -mapcs-32, -mapcs-26 specify which ARM Procedure Calling Standard to use\n")); | |
6688 | fprintf (fp, | |
6689 | _("\ | |
6690 | -mapcs-float floating point args are passed in FP regs\n")); | |
6691 | fprintf (fp, | |
6692 | _("\ | |
6693 | -mapcs-reentrant the code is position independent/reentrant\n")); | |
6694 | #endif | |
6695 | #ifdef OBJ_ELF | |
6696 | fprintf (fp, | |
6697 | _("\ | |
6698 | -moabi support the old ELF ABI\n")); | |
6699 | #endif | |
6700 | #ifdef ARM_BI_ENDIAN | |
6701 | fprintf (fp, | |
6702 | _("\ | |
6703 | -EB assemble code for a big endian cpu\n\ | |
6704 | -EL assemble code for a little endian cpu\n")); | |
6705 | #endif | |
6706 | } | |
6707 | ||
6708 | /* We need to be able to fix up arbitrary expressions in some statements. | |
6709 | This is so that we can handle symbols that are an arbitrary distance from | |
6710 | the pc. The most common cases are of the form ((+/-sym -/+ . - 8) & mask), | |
6711 | which returns part of an address in a form which will be valid for | |
6712 | a data instruction. We do this by pushing the expression into a symbol | |
6713 | in the expr_section, and creating a fix for that. */ | |
6714 | ||
6715 | static void | |
6716 | fix_new_arm (frag, where, size, exp, pc_rel, reloc) | |
6717 | fragS * frag; | |
6718 | int where; | |
6719 | short int size; | |
6720 | expressionS * exp; | |
6721 | int pc_rel; | |
6722 | int reloc; | |
6723 | { | |
6724 | fixS * new_fix; | |
6725 | arm_fix_data * arm_data; | |
6726 | ||
6727 | switch (exp->X_op) | |
6728 | { | |
6729 | case O_constant: | |
6730 | case O_symbol: | |
6731 | case O_add: | |
6732 | case O_subtract: | |
6733 | new_fix = fix_new_exp (frag, where, size, exp, pc_rel, reloc); | |
6734 | break; | |
6735 | ||
6736 | default: | |
6737 | new_fix = fix_new (frag, where, size, make_expr_symbol (exp), 0, | |
6738 | pc_rel, reloc); | |
6739 | break; | |
6740 | } | |
6741 | ||
6742 | /* Mark whether the fix is to a THUMB instruction, or an ARM instruction */ | |
6743 | arm_data = (arm_fix_data *) obstack_alloc (& notes, sizeof (arm_fix_data)); | |
6744 | new_fix->tc_fix_data = (PTR) arm_data; | |
6745 | arm_data->thumb_mode = thumb_mode; | |
6746 | ||
6747 | return; | |
6748 | } | |
6749 | ||
6750 | ||
2f992c04 | 6751 | /* This fix_new is called by cons via TC_CONS_FIX_NEW. */ |
252b5132 RH |
6752 | void |
6753 | cons_fix_new_arm (frag, where, size, exp) | |
6754 | fragS * frag; | |
6755 | int where; | |
6756 | int size; | |
6757 | expressionS * exp; | |
6758 | { | |
6759 | bfd_reloc_code_real_type type; | |
6760 | int pcrel = 0; | |
6761 | ||
6762 | /* Pick a reloc ... | |
6763 | * | |
6764 | * @@ Should look at CPU word size. | |
6765 | */ | |
6766 | switch (size) | |
6767 | { | |
6768 | case 2: | |
6769 | type = BFD_RELOC_16; | |
6770 | break; | |
6771 | case 4: | |
6772 | default: | |
6773 | type = BFD_RELOC_32; | |
6774 | break; | |
6775 | case 8: | |
6776 | type = BFD_RELOC_64; | |
6777 | break; | |
6778 | } | |
6779 | ||
252b5132 RH |
6780 | fix_new_exp (frag, where, (int) size, exp, pcrel, type); |
6781 | } | |
6782 | ||
6783 | /* A good place to do this, although this was probably not intended | |
ae5ad4ad NC |
6784 | for this kind of use. We need to dump the literal pool before |
6785 | references are made to a null symbol pointer. */ | |
252b5132 RH |
6786 | void |
6787 | arm_cleanup () | |
6788 | { | |
ae5ad4ad NC |
6789 | if (current_poolP == NULL) |
6790 | return; | |
6791 | ||
6792 | subseg_set (text_section, 0); /* Put it at the end of text section. */ | |
6793 | s_ltorg (0); | |
6794 | listing_prev_line (); | |
252b5132 RH |
6795 | } |
6796 | ||
6797 | void | |
6798 | arm_start_line_hook () | |
6799 | { | |
6800 | last_label_seen = NULL; | |
6801 | } | |
6802 | ||
6803 | void | |
6804 | arm_frob_label (sym) | |
6805 | symbolS * sym; | |
6806 | { | |
6807 | last_label_seen = sym; | |
6808 | ||
6809 | ARM_SET_THUMB (sym, thumb_mode); | |
6810 | ||
6811 | #if defined OBJ_COFF || defined OBJ_ELF | |
6812 | ARM_SET_INTERWORK (sym, support_interwork); | |
6813 | #endif | |
6814 | ||
6815 | if (label_is_thumb_function_name) | |
6816 | { | |
6817 | /* When the address of a Thumb function is taken the bottom | |
6818 | bit of that address should be set. This will allow | |
6819 | interworking between Arm and Thumb functions to work | |
6820 | correctly. */ | |
6821 | ||
6822 | THUMB_SET_FUNC (sym, 1); | |
6823 | ||
6824 | label_is_thumb_function_name = false; | |
6825 | } | |
6826 | } | |
6827 | ||
6828 | /* Adjust the symbol table. This marks Thumb symbols as distinct from | |
6829 | ARM ones. */ | |
6830 | ||
6831 | void | |
6832 | arm_adjust_symtab () | |
6833 | { | |
6834 | #ifdef OBJ_COFF | |
6835 | symbolS * sym; | |
6836 | ||
6837 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) | |
6838 | { | |
6839 | if (ARM_IS_THUMB (sym)) | |
6840 | { | |
6841 | if (THUMB_IS_FUNC (sym)) | |
6842 | { | |
6843 | /* Mark the symbol as a Thumb function. */ | |
6844 | if ( S_GET_STORAGE_CLASS (sym) == C_STAT | |
6845 | || S_GET_STORAGE_CLASS (sym) == C_LABEL) /* This can happen! */ | |
6846 | S_SET_STORAGE_CLASS (sym, C_THUMBSTATFUNC); | |
6847 | ||
6848 | else if (S_GET_STORAGE_CLASS (sym) == C_EXT) | |
6849 | S_SET_STORAGE_CLASS (sym, C_THUMBEXTFUNC); | |
6850 | else | |
6851 | as_bad (_("%s: unexpected function type: %d"), | |
6852 | S_GET_NAME (sym), S_GET_STORAGE_CLASS (sym)); | |
6853 | } | |
6854 | else switch (S_GET_STORAGE_CLASS (sym)) | |
6855 | { | |
6856 | case C_EXT: | |
6857 | S_SET_STORAGE_CLASS (sym, C_THUMBEXT); | |
6858 | break; | |
6859 | case C_STAT: | |
6860 | S_SET_STORAGE_CLASS (sym, C_THUMBSTAT); | |
6861 | break; | |
6862 | case C_LABEL: | |
6863 | S_SET_STORAGE_CLASS (sym, C_THUMBLABEL); | |
6864 | break; | |
6865 | default: /* do nothing */ | |
6866 | break; | |
6867 | } | |
6868 | } | |
6869 | ||
6870 | if (ARM_IS_INTERWORK (sym)) | |
155f0fe7 | 6871 | coffsymbol (symbol_get_bfdsym (sym))->native->u.syment.n_flags = 0xFF; |
252b5132 RH |
6872 | } |
6873 | #endif | |
6874 | #ifdef OBJ_ELF | |
6875 | symbolS * sym; | |
6876 | elf_symbol_type * elf_sym; | |
6877 | char bind; | |
6878 | ||
6879 | for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym)) | |
6880 | { | |
6881 | if (ARM_IS_THUMB (sym)) | |
6882 | { | |
6883 | if (THUMB_IS_FUNC (sym)) | |
6884 | { | |
174419c1 | 6885 | elf_sym = elf_symbol (symbol_get_bfdsym (sym)); |
252b5132 RH |
6886 | bind = ELF_ST_BIND (elf_sym); |
6887 | elf_sym->internal_elf_sym.st_info = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
6888 | } | |
6889 | } | |
6890 | } | |
6891 | #endif | |
6892 | } | |
6893 | ||
6894 | int | |
6895 | arm_data_in_code () | |
6896 | { | |
6897 | if (thumb_mode && ! strncmp (input_line_pointer + 1, "data:", 5)) | |
6898 | { | |
6899 | *input_line_pointer = '/'; | |
6900 | input_line_pointer += 5; | |
6901 | *input_line_pointer = 0; | |
6902 | return 1; | |
6903 | } | |
6904 | ||
6905 | return 0; | |
6906 | } | |
6907 | ||
6908 | char * | |
6909 | arm_canonicalize_symbol_name (name) | |
6910 | char * name; | |
6911 | { | |
6912 | int len; | |
6913 | ||
6914 | if (thumb_mode && (len = strlen (name)) > 5 | |
6915 | && streq (name + len - 5, "/data")) | |
ae5ad4ad | 6916 | *(name + len - 5) = 0; |
252b5132 RH |
6917 | |
6918 | return name; | |
6919 | } | |
6920 | ||
6921 | boolean | |
6922 | arm_validate_fix (fixP) | |
6923 | fixS * fixP; | |
6924 | { | |
6925 | /* If the destination of the branch is a defined symbol which does not have | |
6926 | the THUMB_FUNC attribute, then we must be calling a function which has | |
6927 | the (interfacearm) attribute. We look for the Thumb entry point to that | |
6928 | function and change the branch to refer to that function instead. */ | |
6929 | if ( fixP->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23 | |
6930 | && fixP->fx_addsy != NULL | |
6931 | && S_IS_DEFINED (fixP->fx_addsy) | |
6932 | && ! THUMB_IS_FUNC (fixP->fx_addsy)) | |
6933 | { | |
6934 | fixP->fx_addsy = find_real_start (fixP->fx_addsy); | |
6935 | return true; | |
6936 | } | |
6937 | ||
6938 | return false; | |
6939 | } | |
6940 | ||
6941 | #ifdef OBJ_ELF | |
6942 | /* Relocations against Thumb function names must be left unadjusted, | |
6943 | so that the linker can use this information to correctly set the | |
6944 | bottom bit of their addresses. The MIPS version of this function | |
6945 | also prevents relocations that are mips-16 specific, but I do not | |
6946 | know why it does this. | |
6947 | ||
6948 | FIXME: | |
6949 | There is one other problem that ought to be addressed here, but | |
6950 | which currently is not: Taking the address of a label (rather | |
6951 | than a function) and then later jumping to that address. Such | |
6952 | addresses also ought to have their bottom bit set (assuming that | |
6953 | they reside in Thumb code), but at the moment they will not. */ | |
6954 | ||
6955 | boolean | |
6956 | arm_fix_adjustable (fixP) | |
6957 | fixS * fixP; | |
6958 | { | |
252b5132 RH |
6959 | if (fixP->fx_addsy == NULL) |
6960 | return 1; | |
6961 | ||
6962 | /* Prevent all adjustments to global symbols. */ | |
6963 | if (S_IS_EXTERN (fixP->fx_addsy)) | |
6964 | return 0; | |
6965 | ||
6966 | if (S_IS_WEAK (fixP->fx_addsy)) | |
6967 | return 0; | |
6968 | ||
6969 | if (THUMB_IS_FUNC (fixP->fx_addsy) | |
6970 | && fixP->fx_subsy == NULL) | |
6971 | return 0; | |
6972 | ||
6973 | /* We need the symbol name for the VTABLE entries */ | |
6974 | if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
6975 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
6976 | return 0; | |
6977 | ||
6978 | return 1; | |
6979 | } | |
6980 | ||
6981 | const char * | |
6982 | elf32_arm_target_format () | |
6983 | { | |
6984 | if (target_big_endian) | |
6985 | if (target_oabi) | |
6986 | return "elf32-bigarm-oabi"; | |
6987 | else | |
6988 | return "elf32-bigarm"; | |
6989 | else | |
6990 | if (target_oabi) | |
6991 | return "elf32-littlearm-oabi"; | |
6992 | else | |
6993 | return "elf32-littlearm"; | |
6994 | } | |
6995 | ||
6996 | void | |
6997 | armelf_frob_symbol (symp, puntp) | |
6998 | symbolS * symp; | |
6999 | int * puntp; | |
7000 | { | |
7001 | elf_frob_symbol (symp, puntp); | |
7002 | } | |
7003 | ||
7004 | int | |
7005 | arm_force_relocation (fixp) | |
7006 | struct fix * fixp; | |
7007 | { | |
7008 | if ( fixp->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
7009 | || fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY | |
ae5ad4ad NC |
7010 | || fixp->fx_r_type == BFD_RELOC_ARM_PCREL_BRANCH |
7011 | || fixp->fx_r_type == BFD_RELOC_THUMB_PCREL_BRANCH23) | |
252b5132 RH |
7012 | return 1; |
7013 | ||
7014 | return 0; | |
7015 | } | |
7016 | ||
7017 | static bfd_reloc_code_real_type | |
7018 | arm_parse_reloc () | |
7019 | { | |
7020 | char id[16]; | |
7021 | char * ip; | |
7022 | int i; | |
7023 | static struct | |
7024 | { | |
7025 | char * str; | |
7026 | int len; | |
7027 | bfd_reloc_code_real_type reloc; | |
7028 | } | |
7029 | reloc_map[] = | |
7030 | { | |
7031 | #define MAP(str,reloc) { str, sizeof (str)-1, reloc } | |
7032 | MAP ("(got)", BFD_RELOC_ARM_GOT32), | |
7033 | MAP ("(gotoff)", BFD_RELOC_ARM_GOTOFF), | |
7034 | /* ScottB: Jan 30, 1998 */ | |
7035 | /* Added support for parsing "var(PLT)" branch instructions */ | |
7036 | /* generated by GCC for PLT relocs */ | |
7037 | MAP ("(plt)", BFD_RELOC_ARM_PLT32), | |
29c4c6b5 | 7038 | { NULL, 0, BFD_RELOC_UNUSED } |
252b5132 RH |
7039 | #undef MAP |
7040 | }; | |
7041 | ||
7042 | for (i = 0, ip = input_line_pointer; | |
7043 | i < sizeof (id) && (isalnum (*ip) || ispunct (*ip)); | |
7044 | i++, ip++) | |
7045 | id[i] = tolower (*ip); | |
7046 | ||
7047 | for (i = 0; reloc_map[i].str; i++) | |
7048 | if (strncmp (id, reloc_map[i].str, reloc_map[i].len) == 0) | |
7049 | break; | |
7050 | ||
7051 | input_line_pointer += reloc_map[i].len; | |
7052 | ||
7053 | return reloc_map[i].reloc; | |
7054 | } | |
7055 | ||
7056 | static void | |
7057 | s_arm_elf_cons (nbytes) | |
7058 | int nbytes; | |
7059 | { | |
7060 | expressionS exp; | |
7061 | ||
7062 | #ifdef md_flush_pending_output | |
7063 | md_flush_pending_output (); | |
7064 | #endif | |
7065 | ||
7066 | if (is_it_end_of_statement ()) | |
7067 | { | |
7068 | demand_empty_rest_of_line (); | |
7069 | return; | |
7070 | } | |
7071 | ||
7072 | #ifdef md_cons_align | |
7073 | md_cons_align (nbytes); | |
7074 | #endif | |
7075 | ||
7076 | do | |
7077 | { | |
7078 | bfd_reloc_code_real_type reloc; | |
7079 | ||
7080 | expression (& exp); | |
7081 | ||
7082 | if (exp.X_op == O_symbol | |
7083 | && * input_line_pointer == '(' | |
7084 | && (reloc = arm_parse_reloc()) != BFD_RELOC_UNUSED) | |
7085 | { | |
7086 | reloc_howto_type * howto = bfd_reloc_type_lookup (stdoutput, reloc); | |
7087 | int size = bfd_get_reloc_size (howto); | |
7088 | ||
7089 | if (size > nbytes) | |
7090 | as_bad ("%s relocations do not fit in %d bytes", howto->name, nbytes); | |
7091 | else | |
7092 | { | |
7093 | register char * p = frag_more ((int) nbytes); | |
7094 | int offset = nbytes - size; | |
7095 | ||
7096 | fix_new_exp (frag_now, p - frag_now->fr_literal + offset, size, | |
7097 | & exp, 0, reloc); | |
7098 | } | |
7099 | } | |
7100 | else | |
7101 | emit_expr (& exp, (unsigned int) nbytes); | |
7102 | } | |
7103 | while (*input_line_pointer++ == ','); | |
7104 | ||
7105 | input_line_pointer--; /* Put terminator back into stream. */ | |
7106 | demand_empty_rest_of_line (); | |
7107 | } | |
7108 | ||
7109 | #endif /* OBJ_ELF */ |