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