| 1 | /* tc-mn10300.c -- Assembler code for the Matsushita 10300 |
| 2 | Copyright (C) 1996-2020 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GAS, the GNU Assembler. |
| 5 | |
| 6 | GAS is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GAS is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GAS; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, |
| 19 | Boston, MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "as.h" |
| 22 | #include "safe-ctype.h" |
| 23 | #include "subsegs.h" |
| 24 | #include "opcode/mn10300.h" |
| 25 | #include "dwarf2dbg.h" |
| 26 | #include "libiberty.h" |
| 27 | \f |
| 28 | /* Structure to hold information about predefined registers. */ |
| 29 | struct reg_name |
| 30 | { |
| 31 | const char *name; |
| 32 | int value; |
| 33 | }; |
| 34 | |
| 35 | /* Generic assembler global variables which must be defined by all |
| 36 | targets. */ |
| 37 | |
| 38 | /* Characters which always start a comment. */ |
| 39 | const char comment_chars[] = "#"; |
| 40 | |
| 41 | /* Characters which start a comment at the beginning of a line. */ |
| 42 | const char line_comment_chars[] = ";#"; |
| 43 | |
| 44 | /* Characters which may be used to separate multiple commands on a |
| 45 | single line. */ |
| 46 | const char line_separator_chars[] = ";"; |
| 47 | |
| 48 | /* Characters which are used to indicate an exponent in a floating |
| 49 | point number. */ |
| 50 | const char EXP_CHARS[] = "eE"; |
| 51 | |
| 52 | /* Characters which mean that a number is a floating point constant, |
| 53 | as in 0d1.0. */ |
| 54 | const char FLT_CHARS[] = "dD"; |
| 55 | \f |
| 56 | const relax_typeS md_relax_table[] = |
| 57 | { |
| 58 | /* The plus values for the bCC and fBCC instructions in the table below |
| 59 | are because the branch instruction is translated into a jump |
| 60 | instruction that is now +2 or +3 bytes further on in memory, and the |
| 61 | correct size of jump instruction must be selected. */ |
| 62 | /* bCC relaxing. */ |
| 63 | {0x7f, -0x80, 2, 1}, |
| 64 | {0x7fff + 2, -0x8000 + 2, 5, 2}, |
| 65 | {0x7fffffff, -0x80000000, 7, 0}, |
| 66 | |
| 67 | /* bCC relaxing (uncommon cases for 3byte length instructions) */ |
| 68 | {0x7f, -0x80, 3, 4}, |
| 69 | {0x7fff + 3, -0x8000 + 3, 6, 5}, |
| 70 | {0x7fffffff, -0x80000000, 8, 0}, |
| 71 | |
| 72 | /* call relaxing. */ |
| 73 | {0x7fff, -0x8000, 5, 7}, |
| 74 | {0x7fffffff, -0x80000000, 7, 0}, |
| 75 | |
| 76 | /* calls relaxing. */ |
| 77 | {0x7fff, -0x8000, 4, 9}, |
| 78 | {0x7fffffff, -0x80000000, 6, 0}, |
| 79 | |
| 80 | /* jmp relaxing. */ |
| 81 | {0x7f, -0x80, 2, 11}, |
| 82 | {0x7fff, -0x8000, 3, 12}, |
| 83 | {0x7fffffff, -0x80000000, 5, 0}, |
| 84 | |
| 85 | /* fbCC relaxing. */ |
| 86 | {0x7f, -0x80, 3, 14}, |
| 87 | {0x7fff + 3, -0x8000 + 3, 6, 15}, |
| 88 | {0x7fffffff, -0x80000000, 8, 0}, |
| 89 | |
| 90 | }; |
| 91 | |
| 92 | static int current_machine; |
| 93 | |
| 94 | /* Fixups. */ |
| 95 | #define MAX_INSN_FIXUPS 5 |
| 96 | |
| 97 | struct mn10300_fixup |
| 98 | { |
| 99 | expressionS exp; |
| 100 | int opindex; |
| 101 | bfd_reloc_code_real_type reloc; |
| 102 | }; |
| 103 | struct mn10300_fixup fixups[MAX_INSN_FIXUPS]; |
| 104 | static int fc; |
| 105 | |
| 106 | /* We must store the value of each register operand so that we can |
| 107 | verify that certain registers do not match. */ |
| 108 | int mn10300_reg_operands[MN10300_MAX_OPERANDS]; |
| 109 | \f |
| 110 | const char *md_shortopts = ""; |
| 111 | |
| 112 | struct option md_longopts[] = |
| 113 | { |
| 114 | {NULL, no_argument, NULL, 0} |
| 115 | }; |
| 116 | |
| 117 | size_t md_longopts_size = sizeof (md_longopts); |
| 118 | |
| 119 | #define HAVE_AM33_2 (current_machine == AM33_2) |
| 120 | #define HAVE_AM33 (current_machine == AM33 || HAVE_AM33_2) |
| 121 | #define HAVE_AM30 (current_machine == AM30) |
| 122 | |
| 123 | /* Opcode hash table. */ |
| 124 | static htab_t mn10300_hash; |
| 125 | |
| 126 | /* This table is sorted. Suitable for searching by a binary search. */ |
| 127 | static const struct reg_name data_registers[] = |
| 128 | { |
| 129 | { "d0", 0 }, |
| 130 | { "d1", 1 }, |
| 131 | { "d2", 2 }, |
| 132 | { "d3", 3 }, |
| 133 | }; |
| 134 | |
| 135 | static const struct reg_name address_registers[] = |
| 136 | { |
| 137 | { "a0", 0 }, |
| 138 | { "a1", 1 }, |
| 139 | { "a2", 2 }, |
| 140 | { "a3", 3 }, |
| 141 | }; |
| 142 | |
| 143 | static const struct reg_name r_registers[] = |
| 144 | { |
| 145 | { "a0", 8 }, |
| 146 | { "a1", 9 }, |
| 147 | { "a2", 10 }, |
| 148 | { "a3", 11 }, |
| 149 | { "d0", 12 }, |
| 150 | { "d1", 13 }, |
| 151 | { "d2", 14 }, |
| 152 | { "d3", 15 }, |
| 153 | { "e0", 0 }, |
| 154 | { "e1", 1 }, |
| 155 | { "e10", 10 }, |
| 156 | { "e11", 11 }, |
| 157 | { "e12", 12 }, |
| 158 | { "e13", 13 }, |
| 159 | { "e14", 14 }, |
| 160 | { "e15", 15 }, |
| 161 | { "e2", 2 }, |
| 162 | { "e3", 3 }, |
| 163 | { "e4", 4 }, |
| 164 | { "e5", 5 }, |
| 165 | { "e6", 6 }, |
| 166 | { "e7", 7 }, |
| 167 | { "e8", 8 }, |
| 168 | { "e9", 9 }, |
| 169 | { "r0", 0 }, |
| 170 | { "r1", 1 }, |
| 171 | { "r10", 10 }, |
| 172 | { "r11", 11 }, |
| 173 | { "r12", 12 }, |
| 174 | { "r13", 13 }, |
| 175 | { "r14", 14 }, |
| 176 | { "r15", 15 }, |
| 177 | { "r2", 2 }, |
| 178 | { "r3", 3 }, |
| 179 | { "r4", 4 }, |
| 180 | { "r5", 5 }, |
| 181 | { "r6", 6 }, |
| 182 | { "r7", 7 }, |
| 183 | { "r8", 8 }, |
| 184 | { "r9", 9 }, |
| 185 | }; |
| 186 | |
| 187 | static const struct reg_name xr_registers[] = |
| 188 | { |
| 189 | { "mcrh", 2 }, |
| 190 | { "mcrl", 3 }, |
| 191 | { "mcvf", 4 }, |
| 192 | { "mdrq", 1 }, |
| 193 | { "sp", 0 }, |
| 194 | { "xr0", 0 }, |
| 195 | { "xr1", 1 }, |
| 196 | { "xr10", 10 }, |
| 197 | { "xr11", 11 }, |
| 198 | { "xr12", 12 }, |
| 199 | { "xr13", 13 }, |
| 200 | { "xr14", 14 }, |
| 201 | { "xr15", 15 }, |
| 202 | { "xr2", 2 }, |
| 203 | { "xr3", 3 }, |
| 204 | { "xr4", 4 }, |
| 205 | { "xr5", 5 }, |
| 206 | { "xr6", 6 }, |
| 207 | { "xr7", 7 }, |
| 208 | { "xr8", 8 }, |
| 209 | { "xr9", 9 }, |
| 210 | }; |
| 211 | |
| 212 | static const struct reg_name float_registers[] = |
| 213 | { |
| 214 | { "fs0", 0 }, |
| 215 | { "fs1", 1 }, |
| 216 | { "fs10", 10 }, |
| 217 | { "fs11", 11 }, |
| 218 | { "fs12", 12 }, |
| 219 | { "fs13", 13 }, |
| 220 | { "fs14", 14 }, |
| 221 | { "fs15", 15 }, |
| 222 | { "fs16", 16 }, |
| 223 | { "fs17", 17 }, |
| 224 | { "fs18", 18 }, |
| 225 | { "fs19", 19 }, |
| 226 | { "fs2", 2 }, |
| 227 | { "fs20", 20 }, |
| 228 | { "fs21", 21 }, |
| 229 | { "fs22", 22 }, |
| 230 | { "fs23", 23 }, |
| 231 | { "fs24", 24 }, |
| 232 | { "fs25", 25 }, |
| 233 | { "fs26", 26 }, |
| 234 | { "fs27", 27 }, |
| 235 | { "fs28", 28 }, |
| 236 | { "fs29", 29 }, |
| 237 | { "fs3", 3 }, |
| 238 | { "fs30", 30 }, |
| 239 | { "fs31", 31 }, |
| 240 | { "fs4", 4 }, |
| 241 | { "fs5", 5 }, |
| 242 | { "fs6", 6 }, |
| 243 | { "fs7", 7 }, |
| 244 | { "fs8", 8 }, |
| 245 | { "fs9", 9 }, |
| 246 | }; |
| 247 | |
| 248 | static const struct reg_name double_registers[] = |
| 249 | { |
| 250 | { "fd0", 0 }, |
| 251 | { "fd10", 10 }, |
| 252 | { "fd12", 12 }, |
| 253 | { "fd14", 14 }, |
| 254 | { "fd16", 16 }, |
| 255 | { "fd18", 18 }, |
| 256 | { "fd2", 2 }, |
| 257 | { "fd20", 20 }, |
| 258 | { "fd22", 22 }, |
| 259 | { "fd24", 24 }, |
| 260 | { "fd26", 26 }, |
| 261 | { "fd28", 28 }, |
| 262 | { "fd30", 30 }, |
| 263 | { "fd4", 4 }, |
| 264 | { "fd6", 6 }, |
| 265 | { "fd8", 8 }, |
| 266 | }; |
| 267 | |
| 268 | /* We abuse the `value' field, that would be otherwise unused, to |
| 269 | encode the architecture on which (access to) the register was |
| 270 | introduced. FIXME: we should probably warn when we encounter a |
| 271 | register name when assembling for an architecture that doesn't |
| 272 | support it, before parsing it as a symbol name. */ |
| 273 | static const struct reg_name other_registers[] = |
| 274 | { |
| 275 | { "epsw", AM33 }, |
| 276 | { "mdr", 0 }, |
| 277 | { "pc", AM33 }, |
| 278 | { "psw", 0 }, |
| 279 | { "sp", 0 }, |
| 280 | { "ssp", 0 }, |
| 281 | { "usp", 0 }, |
| 282 | }; |
| 283 | |
| 284 | #define OTHER_REG_NAME_CNT ARRAY_SIZE (other_registers) |
| 285 | |
| 286 | /* Perform a binary search of the given register table REGS to see |
| 287 | if NAME is a valid register name. Returns the register number from |
| 288 | the array on success, or -1 on failure. */ |
| 289 | |
| 290 | static int |
| 291 | reg_name_search (const struct reg_name *regs, |
| 292 | int regcount, |
| 293 | const char *name) |
| 294 | { |
| 295 | int low, high; |
| 296 | |
| 297 | low = 0; |
| 298 | high = regcount - 1; |
| 299 | |
| 300 | do |
| 301 | { |
| 302 | int cmp, middle; |
| 303 | |
| 304 | middle = (low + high) / 2; |
| 305 | cmp = strcasecmp (name, regs[middle].name); |
| 306 | if (cmp < 0) |
| 307 | high = middle - 1; |
| 308 | else if (cmp > 0) |
| 309 | low = middle + 1; |
| 310 | else |
| 311 | return regs[middle].value; |
| 312 | } |
| 313 | while (low <= high); |
| 314 | |
| 315 | return -1; |
| 316 | } |
| 317 | |
| 318 | /* Looks at the current position in the input line to see if it is |
| 319 | the name of a register in TABLE. If it is, then the name is |
| 320 | converted into an expression returned in EXPRESSIONP (with X_op |
| 321 | set to O_register and X_add_number set to the register number), the |
| 322 | input pointer is left pointing at the first non-blank character after |
| 323 | the name and the function returns TRUE. Otherwise the input pointer |
| 324 | is left alone and the function returns FALSE. */ |
| 325 | |
| 326 | static bfd_boolean |
| 327 | get_register_name (expressionS * expressionP, |
| 328 | const struct reg_name * table, |
| 329 | size_t table_length) |
| 330 | { |
| 331 | int reg_number; |
| 332 | char *name; |
| 333 | char *start; |
| 334 | char c; |
| 335 | |
| 336 | /* Find the spelling of the operand. */ |
| 337 | start = input_line_pointer; |
| 338 | |
| 339 | c = get_symbol_name (&name); |
| 340 | reg_number = reg_name_search (table, table_length, name); |
| 341 | |
| 342 | /* Put back the delimiting char. */ |
| 343 | (void) restore_line_pointer (c); |
| 344 | |
| 345 | /* Look to see if it's in the register table. */ |
| 346 | if (reg_number >= 0) |
| 347 | { |
| 348 | expressionP->X_op = O_register; |
| 349 | expressionP->X_add_number = reg_number; |
| 350 | |
| 351 | /* Make the rest nice. */ |
| 352 | expressionP->X_add_symbol = NULL; |
| 353 | expressionP->X_op_symbol = NULL; |
| 354 | |
| 355 | return TRUE; |
| 356 | } |
| 357 | |
| 358 | /* Reset the line as if we had not done anything. */ |
| 359 | input_line_pointer = start; |
| 360 | return FALSE; |
| 361 | } |
| 362 | |
| 363 | static bfd_boolean |
| 364 | r_register_name (expressionS *expressionP) |
| 365 | { |
| 366 | return get_register_name (expressionP, r_registers, ARRAY_SIZE (r_registers)); |
| 367 | } |
| 368 | |
| 369 | |
| 370 | static bfd_boolean |
| 371 | xr_register_name (expressionS *expressionP) |
| 372 | { |
| 373 | return get_register_name (expressionP, xr_registers, ARRAY_SIZE (xr_registers)); |
| 374 | } |
| 375 | |
| 376 | static bfd_boolean |
| 377 | data_register_name (expressionS *expressionP) |
| 378 | { |
| 379 | return get_register_name (expressionP, data_registers, ARRAY_SIZE (data_registers)); |
| 380 | } |
| 381 | |
| 382 | static bfd_boolean |
| 383 | address_register_name (expressionS *expressionP) |
| 384 | { |
| 385 | return get_register_name (expressionP, address_registers, ARRAY_SIZE (address_registers)); |
| 386 | } |
| 387 | |
| 388 | static bfd_boolean |
| 389 | float_register_name (expressionS *expressionP) |
| 390 | { |
| 391 | return get_register_name (expressionP, float_registers, ARRAY_SIZE (float_registers)); |
| 392 | } |
| 393 | |
| 394 | static bfd_boolean |
| 395 | double_register_name (expressionS *expressionP) |
| 396 | { |
| 397 | return get_register_name (expressionP, double_registers, ARRAY_SIZE (double_registers)); |
| 398 | } |
| 399 | |
| 400 | static bfd_boolean |
| 401 | other_register_name (expressionS *expressionP) |
| 402 | { |
| 403 | int reg_number; |
| 404 | char *name; |
| 405 | char *start; |
| 406 | char c; |
| 407 | |
| 408 | /* Find the spelling of the operand. */ |
| 409 | start = input_line_pointer; |
| 410 | |
| 411 | c = get_symbol_name (&name); |
| 412 | reg_number = reg_name_search (other_registers, ARRAY_SIZE (other_registers), name); |
| 413 | |
| 414 | /* Put back the delimiting char. */ |
| 415 | (void) restore_line_pointer (c); |
| 416 | |
| 417 | /* Look to see if it's in the register table. */ |
| 418 | if (reg_number == 0 |
| 419 | || (reg_number == AM33 && HAVE_AM33)) |
| 420 | { |
| 421 | expressionP->X_op = O_register; |
| 422 | expressionP->X_add_number = 0; |
| 423 | |
| 424 | /* Make the rest nice. */ |
| 425 | expressionP->X_add_symbol = NULL; |
| 426 | expressionP->X_op_symbol = NULL; |
| 427 | |
| 428 | return TRUE; |
| 429 | } |
| 430 | |
| 431 | /* Reset the line as if we had not done anything. */ |
| 432 | input_line_pointer = start; |
| 433 | return FALSE; |
| 434 | } |
| 435 | |
| 436 | void |
| 437 | md_show_usage (FILE *stream) |
| 438 | { |
| 439 | fprintf (stream, _("MN10300 assembler options:\n\ |
| 440 | none yet\n")); |
| 441 | } |
| 442 | |
| 443 | int |
| 444 | md_parse_option (int c ATTRIBUTE_UNUSED, const char *arg ATTRIBUTE_UNUSED) |
| 445 | { |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | symbolS * |
| 450 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 451 | { |
| 452 | return 0; |
| 453 | } |
| 454 | |
| 455 | const char * |
| 456 | md_atof (int type, char *litp, int *sizep) |
| 457 | { |
| 458 | return ieee_md_atof (type, litp, sizep, FALSE); |
| 459 | } |
| 460 | |
| 461 | void |
| 462 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, |
| 463 | asection *sec, |
| 464 | fragS *fragP) |
| 465 | { |
| 466 | static unsigned long label_count = 0; |
| 467 | char buf[40]; |
| 468 | |
| 469 | subseg_change (sec, 0); |
| 470 | if (fragP->fr_subtype == 0) |
| 471 | { |
| 472 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 473 | fragP->fr_offset + 1, 1, BFD_RELOC_8_PCREL); |
| 474 | fragP->fr_var = 0; |
| 475 | fragP->fr_fix += 2; |
| 476 | } |
| 477 | else if (fragP->fr_subtype == 1) |
| 478 | { |
| 479 | /* Reverse the condition of the first branch. */ |
| 480 | int offset = fragP->fr_fix; |
| 481 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 482 | |
| 483 | switch (opcode) |
| 484 | { |
| 485 | case 0xc8: |
| 486 | opcode = 0xc9; |
| 487 | break; |
| 488 | case 0xc9: |
| 489 | opcode = 0xc8; |
| 490 | break; |
| 491 | case 0xc0: |
| 492 | opcode = 0xc2; |
| 493 | break; |
| 494 | case 0xc2: |
| 495 | opcode = 0xc0; |
| 496 | break; |
| 497 | case 0xc3: |
| 498 | opcode = 0xc1; |
| 499 | break; |
| 500 | case 0xc1: |
| 501 | opcode = 0xc3; |
| 502 | break; |
| 503 | case 0xc4: |
| 504 | opcode = 0xc6; |
| 505 | break; |
| 506 | case 0xc6: |
| 507 | opcode = 0xc4; |
| 508 | break; |
| 509 | case 0xc7: |
| 510 | opcode = 0xc5; |
| 511 | break; |
| 512 | case 0xc5: |
| 513 | opcode = 0xc7; |
| 514 | break; |
| 515 | default: |
| 516 | abort (); |
| 517 | } |
| 518 | fragP->fr_literal[offset] = opcode; |
| 519 | |
| 520 | /* Create a fixup for the reversed conditional branch. */ |
| 521 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 522 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 523 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 524 | fragP->fr_offset + 1, 1, BFD_RELOC_8_PCREL); |
| 525 | |
| 526 | /* Now create the unconditional branch + fixup to the |
| 527 | final target. */ |
| 528 | fragP->fr_literal[offset + 2] = 0xcc; |
| 529 | fix_new (fragP, fragP->fr_fix + 3, 2, fragP->fr_symbol, |
| 530 | fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL); |
| 531 | fragP->fr_var = 0; |
| 532 | fragP->fr_fix += 5; |
| 533 | } |
| 534 | else if (fragP->fr_subtype == 2) |
| 535 | { |
| 536 | /* Reverse the condition of the first branch. */ |
| 537 | int offset = fragP->fr_fix; |
| 538 | int opcode = fragP->fr_literal[offset] & 0xff; |
| 539 | |
| 540 | switch (opcode) |
| 541 | { |
| 542 | case 0xc8: |
| 543 | opcode = 0xc9; |
| 544 | break; |
| 545 | case 0xc9: |
| 546 | opcode = 0xc8; |
| 547 | break; |
| 548 | case 0xc0: |
| 549 | opcode = 0xc2; |
| 550 | break; |
| 551 | case 0xc2: |
| 552 | opcode = 0xc0; |
| 553 | break; |
| 554 | case 0xc3: |
| 555 | opcode = 0xc1; |
| 556 | break; |
| 557 | case 0xc1: |
| 558 | opcode = 0xc3; |
| 559 | break; |
| 560 | case 0xc4: |
| 561 | opcode = 0xc6; |
| 562 | break; |
| 563 | case 0xc6: |
| 564 | opcode = 0xc4; |
| 565 | break; |
| 566 | case 0xc7: |
| 567 | opcode = 0xc5; |
| 568 | break; |
| 569 | case 0xc5: |
| 570 | opcode = 0xc7; |
| 571 | break; |
| 572 | default: |
| 573 | abort (); |
| 574 | } |
| 575 | fragP->fr_literal[offset] = opcode; |
| 576 | |
| 577 | /* Create a fixup for the reversed conditional branch. */ |
| 578 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 579 | fix_new (fragP, fragP->fr_fix + 1, 1, |
| 580 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 581 | fragP->fr_offset + 1, 1, BFD_RELOC_8_PCREL); |
| 582 | |
| 583 | /* Now create the unconditional branch + fixup to the |
| 584 | final target. */ |
| 585 | fragP->fr_literal[offset + 2] = 0xdc; |
| 586 | fix_new (fragP, fragP->fr_fix + 3, 4, fragP->fr_symbol, |
| 587 | fragP->fr_offset + 1, 1, BFD_RELOC_32_PCREL); |
| 588 | fragP->fr_var = 0; |
| 589 | fragP->fr_fix += 7; |
| 590 | } |
| 591 | else if (fragP->fr_subtype == 3) |
| 592 | { |
| 593 | fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol, |
| 594 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 595 | fragP->fr_var = 0; |
| 596 | fragP->fr_fix += 3; |
| 597 | } |
| 598 | else if (fragP->fr_subtype == 4) |
| 599 | { |
| 600 | /* Reverse the condition of the first branch. */ |
| 601 | int offset = fragP->fr_fix; |
| 602 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 603 | |
| 604 | switch (opcode) |
| 605 | { |
| 606 | case 0xe8: |
| 607 | opcode = 0xe9; |
| 608 | break; |
| 609 | case 0xe9: |
| 610 | opcode = 0xe8; |
| 611 | break; |
| 612 | case 0xea: |
| 613 | opcode = 0xeb; |
| 614 | break; |
| 615 | case 0xeb: |
| 616 | opcode = 0xea; |
| 617 | break; |
| 618 | default: |
| 619 | abort (); |
| 620 | } |
| 621 | fragP->fr_literal[offset + 1] = opcode; |
| 622 | |
| 623 | /* Create a fixup for the reversed conditional branch. */ |
| 624 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 625 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 626 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 627 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 628 | |
| 629 | /* Now create the unconditional branch + fixup to the |
| 630 | final target. */ |
| 631 | fragP->fr_literal[offset + 3] = 0xcc; |
| 632 | fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol, |
| 633 | fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL); |
| 634 | fragP->fr_var = 0; |
| 635 | fragP->fr_fix += 6; |
| 636 | } |
| 637 | else if (fragP->fr_subtype == 5) |
| 638 | { |
| 639 | /* Reverse the condition of the first branch. */ |
| 640 | int offset = fragP->fr_fix; |
| 641 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 642 | |
| 643 | switch (opcode) |
| 644 | { |
| 645 | case 0xe8: |
| 646 | opcode = 0xe9; |
| 647 | break; |
| 648 | case 0xea: |
| 649 | opcode = 0xeb; |
| 650 | break; |
| 651 | case 0xeb: |
| 652 | opcode = 0xea; |
| 653 | break; |
| 654 | default: |
| 655 | abort (); |
| 656 | } |
| 657 | fragP->fr_literal[offset + 1] = opcode; |
| 658 | |
| 659 | /* Create a fixup for the reversed conditional branch. */ |
| 660 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 661 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 662 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 663 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 664 | |
| 665 | /* Now create the unconditional branch + fixup to the |
| 666 | final target. */ |
| 667 | fragP->fr_literal[offset + 3] = 0xdc; |
| 668 | fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol, |
| 669 | fragP->fr_offset + 1, 1, BFD_RELOC_32_PCREL); |
| 670 | fragP->fr_var = 0; |
| 671 | fragP->fr_fix += 8; |
| 672 | } |
| 673 | else if (fragP->fr_subtype == 6) |
| 674 | { |
| 675 | int offset = fragP->fr_fix; |
| 676 | |
| 677 | fragP->fr_literal[offset] = 0xcd; |
| 678 | fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol, |
| 679 | fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL); |
| 680 | fragP->fr_var = 0; |
| 681 | fragP->fr_fix += 5; |
| 682 | } |
| 683 | else if (fragP->fr_subtype == 7) |
| 684 | { |
| 685 | int offset = fragP->fr_fix; |
| 686 | |
| 687 | fragP->fr_literal[offset] = 0xdd; |
| 688 | fragP->fr_literal[offset + 5] = fragP->fr_literal[offset + 3]; |
| 689 | fragP->fr_literal[offset + 6] = fragP->fr_literal[offset + 4]; |
| 690 | fragP->fr_literal[offset + 3] = 0; |
| 691 | fragP->fr_literal[offset + 4] = 0; |
| 692 | |
| 693 | fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol, |
| 694 | fragP->fr_offset + 1, 1, BFD_RELOC_32_PCREL); |
| 695 | fragP->fr_var = 0; |
| 696 | fragP->fr_fix += 7; |
| 697 | } |
| 698 | else if (fragP->fr_subtype == 8) |
| 699 | { |
| 700 | int offset = fragP->fr_fix; |
| 701 | |
| 702 | fragP->fr_literal[offset] = 0xfa; |
| 703 | fragP->fr_literal[offset + 1] = 0xff; |
| 704 | fix_new (fragP, fragP->fr_fix + 2, 2, fragP->fr_symbol, |
| 705 | fragP->fr_offset + 2, 1, BFD_RELOC_16_PCREL); |
| 706 | fragP->fr_var = 0; |
| 707 | fragP->fr_fix += 4; |
| 708 | } |
| 709 | else if (fragP->fr_subtype == 9) |
| 710 | { |
| 711 | int offset = fragP->fr_fix; |
| 712 | |
| 713 | fragP->fr_literal[offset] = 0xfc; |
| 714 | fragP->fr_literal[offset + 1] = 0xff; |
| 715 | |
| 716 | fix_new (fragP, fragP->fr_fix + 2, 4, fragP->fr_symbol, |
| 717 | fragP->fr_offset + 2, 1, BFD_RELOC_32_PCREL); |
| 718 | fragP->fr_var = 0; |
| 719 | fragP->fr_fix += 6; |
| 720 | } |
| 721 | else if (fragP->fr_subtype == 10) |
| 722 | { |
| 723 | fragP->fr_literal[fragP->fr_fix] = 0xca; |
| 724 | fix_new (fragP, fragP->fr_fix + 1, 1, fragP->fr_symbol, |
| 725 | fragP->fr_offset + 1, 1, BFD_RELOC_8_PCREL); |
| 726 | fragP->fr_var = 0; |
| 727 | fragP->fr_fix += 2; |
| 728 | } |
| 729 | else if (fragP->fr_subtype == 11) |
| 730 | { |
| 731 | int offset = fragP->fr_fix; |
| 732 | |
| 733 | fragP->fr_literal[offset] = 0xcc; |
| 734 | |
| 735 | fix_new (fragP, fragP->fr_fix + 1, 2, fragP->fr_symbol, |
| 736 | fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL); |
| 737 | fragP->fr_var = 0; |
| 738 | fragP->fr_fix += 3; |
| 739 | } |
| 740 | else if (fragP->fr_subtype == 12) |
| 741 | { |
| 742 | int offset = fragP->fr_fix; |
| 743 | |
| 744 | fragP->fr_literal[offset] = 0xdc; |
| 745 | |
| 746 | fix_new (fragP, fragP->fr_fix + 1, 4, fragP->fr_symbol, |
| 747 | fragP->fr_offset + 1, 1, BFD_RELOC_32_PCREL); |
| 748 | fragP->fr_var = 0; |
| 749 | fragP->fr_fix += 5; |
| 750 | } |
| 751 | else if (fragP->fr_subtype == 13) |
| 752 | { |
| 753 | fix_new (fragP, fragP->fr_fix + 2, 1, fragP->fr_symbol, |
| 754 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 755 | fragP->fr_var = 0; |
| 756 | fragP->fr_fix += 3; |
| 757 | } |
| 758 | else if (fragP->fr_subtype == 14) |
| 759 | { |
| 760 | /* Reverse the condition of the first branch. */ |
| 761 | int offset = fragP->fr_fix; |
| 762 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 763 | |
| 764 | switch (opcode) |
| 765 | { |
| 766 | case 0xd0: |
| 767 | opcode = 0xd1; |
| 768 | break; |
| 769 | case 0xd1: |
| 770 | opcode = 0xd0; |
| 771 | break; |
| 772 | case 0xd2: |
| 773 | opcode = 0xdc; |
| 774 | break; |
| 775 | case 0xd3: |
| 776 | opcode = 0xdb; |
| 777 | break; |
| 778 | case 0xd4: |
| 779 | opcode = 0xda; |
| 780 | break; |
| 781 | case 0xd5: |
| 782 | opcode = 0xd9; |
| 783 | break; |
| 784 | case 0xd6: |
| 785 | opcode = 0xd8; |
| 786 | break; |
| 787 | case 0xd7: |
| 788 | opcode = 0xdd; |
| 789 | break; |
| 790 | case 0xd8: |
| 791 | opcode = 0xd6; |
| 792 | break; |
| 793 | case 0xd9: |
| 794 | opcode = 0xd5; |
| 795 | break; |
| 796 | case 0xda: |
| 797 | opcode = 0xd4; |
| 798 | break; |
| 799 | case 0xdb: |
| 800 | opcode = 0xd3; |
| 801 | break; |
| 802 | case 0xdc: |
| 803 | opcode = 0xd2; |
| 804 | break; |
| 805 | case 0xdd: |
| 806 | opcode = 0xd7; |
| 807 | break; |
| 808 | default: |
| 809 | abort (); |
| 810 | } |
| 811 | fragP->fr_literal[offset + 1] = opcode; |
| 812 | |
| 813 | /* Create a fixup for the reversed conditional branch. */ |
| 814 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 815 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 816 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 817 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 818 | |
| 819 | /* Now create the unconditional branch + fixup to the |
| 820 | final target. */ |
| 821 | fragP->fr_literal[offset + 3] = 0xcc; |
| 822 | fix_new (fragP, fragP->fr_fix + 4, 2, fragP->fr_symbol, |
| 823 | fragP->fr_offset + 1, 1, BFD_RELOC_16_PCREL); |
| 824 | fragP->fr_var = 0; |
| 825 | fragP->fr_fix += 6; |
| 826 | } |
| 827 | else if (fragP->fr_subtype == 15) |
| 828 | { |
| 829 | /* Reverse the condition of the first branch. */ |
| 830 | int offset = fragP->fr_fix; |
| 831 | int opcode = fragP->fr_literal[offset + 1] & 0xff; |
| 832 | |
| 833 | switch (opcode) |
| 834 | { |
| 835 | case 0xd0: |
| 836 | opcode = 0xd1; |
| 837 | break; |
| 838 | case 0xd1: |
| 839 | opcode = 0xd0; |
| 840 | break; |
| 841 | case 0xd2: |
| 842 | opcode = 0xdc; |
| 843 | break; |
| 844 | case 0xd3: |
| 845 | opcode = 0xdb; |
| 846 | break; |
| 847 | case 0xd4: |
| 848 | opcode = 0xda; |
| 849 | break; |
| 850 | case 0xd5: |
| 851 | opcode = 0xd9; |
| 852 | break; |
| 853 | case 0xd6: |
| 854 | opcode = 0xd8; |
| 855 | break; |
| 856 | case 0xd7: |
| 857 | opcode = 0xdd; |
| 858 | break; |
| 859 | case 0xd8: |
| 860 | opcode = 0xd6; |
| 861 | break; |
| 862 | case 0xd9: |
| 863 | opcode = 0xd5; |
| 864 | break; |
| 865 | case 0xda: |
| 866 | opcode = 0xd4; |
| 867 | break; |
| 868 | case 0xdb: |
| 869 | opcode = 0xd3; |
| 870 | break; |
| 871 | case 0xdc: |
| 872 | opcode = 0xd2; |
| 873 | break; |
| 874 | case 0xdd: |
| 875 | opcode = 0xd7; |
| 876 | break; |
| 877 | default: |
| 878 | abort (); |
| 879 | } |
| 880 | fragP->fr_literal[offset + 1] = opcode; |
| 881 | |
| 882 | /* Create a fixup for the reversed conditional branch. */ |
| 883 | sprintf (buf, ".%s_%ld", FAKE_LABEL_NAME, label_count++); |
| 884 | fix_new (fragP, fragP->fr_fix + 2, 1, |
| 885 | symbol_new (buf, sec, fragP->fr_next, 0), |
| 886 | fragP->fr_offset + 2, 1, BFD_RELOC_8_PCREL); |
| 887 | |
| 888 | /* Now create the unconditional branch + fixup to the |
| 889 | final target. */ |
| 890 | fragP->fr_literal[offset + 3] = 0xdc; |
| 891 | fix_new (fragP, fragP->fr_fix + 4, 4, fragP->fr_symbol, |
| 892 | fragP->fr_offset + 1, 1, BFD_RELOC_32_PCREL); |
| 893 | fragP->fr_var = 0; |
| 894 | fragP->fr_fix += 8; |
| 895 | } |
| 896 | else |
| 897 | abort (); |
| 898 | } |
| 899 | |
| 900 | valueT |
| 901 | md_section_align (asection *seg, valueT addr) |
| 902 | { |
| 903 | int align = bfd_section_alignment (seg); |
| 904 | |
| 905 | return ((addr + (1 << align) - 1) & -(1 << align)); |
| 906 | } |
| 907 | |
| 908 | void |
| 909 | md_begin (void) |
| 910 | { |
| 911 | const char *prev_name = ""; |
| 912 | const struct mn10300_opcode *op; |
| 913 | |
| 914 | mn10300_hash = str_htab_create (); |
| 915 | |
| 916 | /* Insert unique names into hash table. The MN10300 instruction set |
| 917 | has many identical opcode names that have different opcodes based |
| 918 | on the operands. This hash table then provides a quick index to |
| 919 | the first opcode with a particular name in the opcode table. */ |
| 920 | |
| 921 | op = mn10300_opcodes; |
| 922 | while (op->name) |
| 923 | { |
| 924 | if (strcmp (prev_name, op->name)) |
| 925 | { |
| 926 | prev_name = (char *) op->name; |
| 927 | str_hash_insert (mn10300_hash, op->name, (char *) op); |
| 928 | } |
| 929 | op++; |
| 930 | } |
| 931 | |
| 932 | /* Set the default machine type. */ |
| 933 | #ifdef TE_LINUX |
| 934 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_mn10300, AM33_2)) |
| 935 | as_warn (_("could not set architecture and machine")); |
| 936 | |
| 937 | current_machine = AM33_2; |
| 938 | #else |
| 939 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_mn10300, MN103)) |
| 940 | as_warn (_("could not set architecture and machine")); |
| 941 | |
| 942 | current_machine = MN103; |
| 943 | #endif |
| 944 | |
| 945 | /* Set linkrelax here to avoid fixups in most sections. */ |
| 946 | linkrelax = 1; |
| 947 | } |
| 948 | |
| 949 | static symbolS *GOT_symbol; |
| 950 | |
| 951 | static inline int |
| 952 | mn10300_PIC_related_p (symbolS *sym) |
| 953 | { |
| 954 | expressionS *exp; |
| 955 | |
| 956 | if (! sym) |
| 957 | return 0; |
| 958 | |
| 959 | if (sym == GOT_symbol) |
| 960 | return 1; |
| 961 | |
| 962 | exp = symbol_get_value_expression (sym); |
| 963 | |
| 964 | return (exp->X_op == O_PIC_reloc |
| 965 | || mn10300_PIC_related_p (exp->X_add_symbol) |
| 966 | || mn10300_PIC_related_p (exp->X_op_symbol)); |
| 967 | } |
| 968 | |
| 969 | static inline int |
| 970 | mn10300_check_fixup (struct mn10300_fixup *fixup) |
| 971 | { |
| 972 | expressionS *exp = &fixup->exp; |
| 973 | |
| 974 | repeat: |
| 975 | switch (exp->X_op) |
| 976 | { |
| 977 | case O_add: |
| 978 | case O_subtract: /* If we're sufficiently unlucky that the label |
| 979 | and the expression that references it happen |
| 980 | to end up in different frags, the subtract |
| 981 | won't be simplified within expression(). */ |
| 982 | /* The PIC-related operand must be the first operand of a sum. */ |
| 983 | if (exp != &fixup->exp || mn10300_PIC_related_p (exp->X_op_symbol)) |
| 984 | return 1; |
| 985 | |
| 986 | if (exp->X_add_symbol && exp->X_add_symbol == GOT_symbol) |
| 987 | fixup->reloc = BFD_RELOC_32_GOT_PCREL; |
| 988 | |
| 989 | exp = symbol_get_value_expression (exp->X_add_symbol); |
| 990 | goto repeat; |
| 991 | |
| 992 | case O_symbol: |
| 993 | if (exp->X_add_symbol && exp->X_add_symbol == GOT_symbol) |
| 994 | fixup->reloc = BFD_RELOC_32_GOT_PCREL; |
| 995 | break; |
| 996 | |
| 997 | case O_PIC_reloc: |
| 998 | fixup->reloc = exp->X_md; |
| 999 | exp->X_op = O_symbol; |
| 1000 | if (fixup->reloc == BFD_RELOC_32_PLT_PCREL |
| 1001 | && fixup->opindex >= 0 |
| 1002 | && (mn10300_operands[fixup->opindex].flags |
| 1003 | & MN10300_OPERAND_RELAX)) |
| 1004 | return 1; |
| 1005 | break; |
| 1006 | |
| 1007 | default: |
| 1008 | return (mn10300_PIC_related_p (exp->X_add_symbol) |
| 1009 | || mn10300_PIC_related_p (exp->X_op_symbol)); |
| 1010 | } |
| 1011 | |
| 1012 | return 0; |
| 1013 | } |
| 1014 | |
| 1015 | void |
| 1016 | mn10300_cons_fix_new (fragS *frag, int off, int size, expressionS *exp, |
| 1017 | bfd_reloc_code_real_type r ATTRIBUTE_UNUSED) |
| 1018 | { |
| 1019 | struct mn10300_fixup fixup; |
| 1020 | |
| 1021 | fixup.opindex = -1; |
| 1022 | fixup.exp = *exp; |
| 1023 | fixup.reloc = BFD_RELOC_UNUSED; |
| 1024 | |
| 1025 | mn10300_check_fixup (&fixup); |
| 1026 | |
| 1027 | if (fixup.reloc == BFD_RELOC_MN10300_GOT32) |
| 1028 | switch (size) |
| 1029 | { |
| 1030 | case 2: |
| 1031 | fixup.reloc = BFD_RELOC_MN10300_GOT16; |
| 1032 | break; |
| 1033 | |
| 1034 | case 3: |
| 1035 | fixup.reloc = BFD_RELOC_MN10300_GOT24; |
| 1036 | break; |
| 1037 | |
| 1038 | case 4: |
| 1039 | break; |
| 1040 | |
| 1041 | default: |
| 1042 | goto error; |
| 1043 | } |
| 1044 | else if (fixup.reloc == BFD_RELOC_UNUSED) |
| 1045 | switch (size) |
| 1046 | { |
| 1047 | case 1: |
| 1048 | fixup.reloc = BFD_RELOC_8; |
| 1049 | break; |
| 1050 | |
| 1051 | case 2: |
| 1052 | fixup.reloc = BFD_RELOC_16; |
| 1053 | break; |
| 1054 | |
| 1055 | case 3: |
| 1056 | fixup.reloc = BFD_RELOC_24; |
| 1057 | break; |
| 1058 | |
| 1059 | case 4: |
| 1060 | fixup.reloc = BFD_RELOC_32; |
| 1061 | break; |
| 1062 | |
| 1063 | default: |
| 1064 | goto error; |
| 1065 | } |
| 1066 | else if (size != 4) |
| 1067 | { |
| 1068 | error: |
| 1069 | as_bad (_("unsupported BFD relocation size %u"), size); |
| 1070 | fixup.reloc = BFD_RELOC_UNUSED; |
| 1071 | } |
| 1072 | |
| 1073 | fix_new_exp (frag, off, size, &fixup.exp, 0, fixup.reloc); |
| 1074 | } |
| 1075 | |
| 1076 | static bfd_boolean |
| 1077 | check_operand (const struct mn10300_operand *operand, |
| 1078 | offsetT val) |
| 1079 | { |
| 1080 | /* No need to check 32bit operands for a bit. Note that |
| 1081 | MN10300_OPERAND_SPLIT is an implicit 32bit operand. */ |
| 1082 | if (operand->bits != 32 |
| 1083 | && (operand->flags & MN10300_OPERAND_SPLIT) == 0) |
| 1084 | { |
| 1085 | long min, max; |
| 1086 | offsetT test; |
| 1087 | int bits; |
| 1088 | |
| 1089 | bits = operand->bits; |
| 1090 | if (operand->flags & MN10300_OPERAND_24BIT) |
| 1091 | bits = 24; |
| 1092 | |
| 1093 | if ((operand->flags & MN10300_OPERAND_SIGNED) != 0) |
| 1094 | { |
| 1095 | max = (1 << (bits - 1)) - 1; |
| 1096 | min = - (1 << (bits - 1)); |
| 1097 | } |
| 1098 | else |
| 1099 | { |
| 1100 | max = (1 << bits) - 1; |
| 1101 | min = 0; |
| 1102 | } |
| 1103 | |
| 1104 | test = val; |
| 1105 | |
| 1106 | if (test < (offsetT) min || test > (offsetT) max) |
| 1107 | return FALSE; |
| 1108 | } |
| 1109 | return TRUE; |
| 1110 | } |
| 1111 | |
| 1112 | /* Insert an operand value into an instruction. */ |
| 1113 | |
| 1114 | static void |
| 1115 | mn10300_insert_operand (unsigned long *insnp, |
| 1116 | unsigned long *extensionp, |
| 1117 | const struct mn10300_operand *operand, |
| 1118 | offsetT val, |
| 1119 | char *file, |
| 1120 | unsigned int line, |
| 1121 | unsigned int shift) |
| 1122 | { |
| 1123 | /* No need to check 32bit operands for a bit. Note that |
| 1124 | MN10300_OPERAND_SPLIT is an implicit 32bit operand. */ |
| 1125 | if (operand->bits != 32 |
| 1126 | && (operand->flags & MN10300_OPERAND_SPLIT) == 0) |
| 1127 | { |
| 1128 | long min, max; |
| 1129 | offsetT test; |
| 1130 | int bits; |
| 1131 | |
| 1132 | bits = operand->bits; |
| 1133 | if (operand->flags & MN10300_OPERAND_24BIT) |
| 1134 | bits = 24; |
| 1135 | |
| 1136 | if ((operand->flags & MN10300_OPERAND_SIGNED) != 0) |
| 1137 | { |
| 1138 | max = (1 << (bits - 1)) - 1; |
| 1139 | min = - (1 << (bits - 1)); |
| 1140 | } |
| 1141 | else |
| 1142 | { |
| 1143 | max = (1 << bits) - 1; |
| 1144 | min = 0; |
| 1145 | } |
| 1146 | |
| 1147 | test = val; |
| 1148 | |
| 1149 | if (test < (offsetT) min || test > (offsetT) max) |
| 1150 | as_warn_value_out_of_range (_("operand"), test, (offsetT) min, (offsetT) max, file, line); |
| 1151 | } |
| 1152 | |
| 1153 | if ((operand->flags & MN10300_OPERAND_SPLIT) != 0) |
| 1154 | { |
| 1155 | *insnp |= (val >> (32 - operand->bits)) & ((1 << operand->bits) - 1); |
| 1156 | *extensionp |= ((val & ((1 << (32 - operand->bits)) - 1)) |
| 1157 | << operand->shift); |
| 1158 | } |
| 1159 | else if ((operand->flags & MN10300_OPERAND_24BIT) != 0) |
| 1160 | { |
| 1161 | *insnp |= (val >> (24 - operand->bits)) & ((1 << operand->bits) - 1); |
| 1162 | *extensionp |= ((val & ((1 << (24 - operand->bits)) - 1)) |
| 1163 | << operand->shift); |
| 1164 | } |
| 1165 | else if ((operand->flags & (MN10300_OPERAND_FSREG | MN10300_OPERAND_FDREG))) |
| 1166 | { |
| 1167 | /* See devo/opcodes/m10300-opc.c just before #define FSM0 for an |
| 1168 | explanation of these variables. Note that FMT-implied shifts |
| 1169 | are not taken into account for FP registers. */ |
| 1170 | unsigned long mask_low, mask_high; |
| 1171 | int shl_low, shr_high, shl_high; |
| 1172 | |
| 1173 | switch (operand->bits) |
| 1174 | { |
| 1175 | case 5: |
| 1176 | /* Handle regular FP registers. */ |
| 1177 | if (operand->shift >= 0) |
| 1178 | { |
| 1179 | /* This is an `m' register. */ |
| 1180 | shl_low = operand->shift; |
| 1181 | shl_high = 8 + (8 & shl_low) + (shl_low & 4) / 4; |
| 1182 | } |
| 1183 | else |
| 1184 | { |
| 1185 | /* This is an `n' register. */ |
| 1186 | shl_low = -operand->shift; |
| 1187 | shl_high = shl_low / 4; |
| 1188 | } |
| 1189 | |
| 1190 | mask_low = 0x0f; |
| 1191 | mask_high = 0x10; |
| 1192 | shr_high = 4; |
| 1193 | break; |
| 1194 | |
| 1195 | case 3: |
| 1196 | /* Handle accumulators. */ |
| 1197 | shl_low = -operand->shift; |
| 1198 | shl_high = 0; |
| 1199 | mask_low = 0x03; |
| 1200 | mask_high = 0x04; |
| 1201 | shr_high = 2; |
| 1202 | break; |
| 1203 | |
| 1204 | default: |
| 1205 | abort (); |
| 1206 | } |
| 1207 | *insnp |= ((((val & mask_high) >> shr_high) << shl_high) |
| 1208 | | ((val & mask_low) << shl_low)); |
| 1209 | } |
| 1210 | else if ((operand->flags & MN10300_OPERAND_EXTENDED) == 0) |
| 1211 | { |
| 1212 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1213 | << (operand->shift + shift)); |
| 1214 | |
| 1215 | if ((operand->flags & MN10300_OPERAND_REPEATED) != 0) |
| 1216 | *insnp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1217 | << (operand->shift + shift + operand->bits)); |
| 1218 | } |
| 1219 | else |
| 1220 | { |
| 1221 | *extensionp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1222 | << (operand->shift + shift)); |
| 1223 | |
| 1224 | if ((operand->flags & MN10300_OPERAND_REPEATED) != 0) |
| 1225 | *extensionp |= (((long) val & ((1 << operand->bits) - 1)) |
| 1226 | << (operand->shift + shift + operand->bits)); |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | void |
| 1231 | md_assemble (char *str) |
| 1232 | { |
| 1233 | char *s; |
| 1234 | struct mn10300_opcode *opcode; |
| 1235 | struct mn10300_opcode *next_opcode; |
| 1236 | const unsigned char *opindex_ptr; |
| 1237 | int next_opindex, relaxable; |
| 1238 | unsigned long insn, extension, size = 0; |
| 1239 | char *f; |
| 1240 | int i; |
| 1241 | int match; |
| 1242 | |
| 1243 | /* Get the opcode. */ |
| 1244 | for (s = str; *s != '\0' && !ISSPACE (*s); s++) |
| 1245 | ; |
| 1246 | if (*s != '\0') |
| 1247 | *s++ = '\0'; |
| 1248 | |
| 1249 | /* Find the first opcode with the proper name. */ |
| 1250 | opcode = (struct mn10300_opcode *) str_hash_find (mn10300_hash, str); |
| 1251 | if (opcode == NULL) |
| 1252 | { |
| 1253 | as_bad (_("Unrecognized opcode: `%s'"), str); |
| 1254 | return; |
| 1255 | } |
| 1256 | |
| 1257 | str = s; |
| 1258 | while (ISSPACE (*str)) |
| 1259 | ++str; |
| 1260 | |
| 1261 | input_line_pointer = str; |
| 1262 | |
| 1263 | for (;;) |
| 1264 | { |
| 1265 | const char *errmsg; |
| 1266 | int op_idx; |
| 1267 | char *hold; |
| 1268 | int extra_shift = 0; |
| 1269 | |
| 1270 | errmsg = _("Invalid opcode/operands"); |
| 1271 | |
| 1272 | /* Reset the array of register operands. */ |
| 1273 | memset (mn10300_reg_operands, -1, sizeof (mn10300_reg_operands)); |
| 1274 | |
| 1275 | relaxable = 0; |
| 1276 | fc = 0; |
| 1277 | match = 0; |
| 1278 | next_opindex = 0; |
| 1279 | insn = opcode->opcode; |
| 1280 | extension = 0; |
| 1281 | |
| 1282 | /* If the instruction is not available on the current machine |
| 1283 | then it can not possibly match. */ |
| 1284 | if (opcode->machine |
| 1285 | && !(opcode->machine == AM33_2 && HAVE_AM33_2) |
| 1286 | && !(opcode->machine == AM33 && HAVE_AM33) |
| 1287 | && !(opcode->machine == AM30 && HAVE_AM30)) |
| 1288 | goto error; |
| 1289 | |
| 1290 | for (op_idx = 1, opindex_ptr = opcode->operands; |
| 1291 | *opindex_ptr != 0; |
| 1292 | opindex_ptr++, op_idx++) |
| 1293 | { |
| 1294 | const struct mn10300_operand *operand; |
| 1295 | expressionS ex; |
| 1296 | |
| 1297 | if (next_opindex == 0) |
| 1298 | { |
| 1299 | operand = &mn10300_operands[*opindex_ptr]; |
| 1300 | } |
| 1301 | else |
| 1302 | { |
| 1303 | operand = &mn10300_operands[next_opindex]; |
| 1304 | next_opindex = 0; |
| 1305 | } |
| 1306 | |
| 1307 | while (*str == ' ' || *str == ',') |
| 1308 | ++str; |
| 1309 | |
| 1310 | if (operand->flags & MN10300_OPERAND_RELAX) |
| 1311 | relaxable = 1; |
| 1312 | |
| 1313 | /* Gather the operand. */ |
| 1314 | hold = input_line_pointer; |
| 1315 | input_line_pointer = str; |
| 1316 | |
| 1317 | if (operand->flags & MN10300_OPERAND_PAREN) |
| 1318 | { |
| 1319 | if (*input_line_pointer != ')' && *input_line_pointer != '(') |
| 1320 | { |
| 1321 | input_line_pointer = hold; |
| 1322 | str = hold; |
| 1323 | goto error; |
| 1324 | } |
| 1325 | input_line_pointer++; |
| 1326 | goto keep_going; |
| 1327 | } |
| 1328 | /* See if we can match the operands. */ |
| 1329 | else if (operand->flags & MN10300_OPERAND_DREG) |
| 1330 | { |
| 1331 | if (!data_register_name (&ex)) |
| 1332 | { |
| 1333 | input_line_pointer = hold; |
| 1334 | str = hold; |
| 1335 | goto error; |
| 1336 | } |
| 1337 | } |
| 1338 | else if (operand->flags & MN10300_OPERAND_AREG) |
| 1339 | { |
| 1340 | if (!address_register_name (&ex)) |
| 1341 | { |
| 1342 | input_line_pointer = hold; |
| 1343 | str = hold; |
| 1344 | goto error; |
| 1345 | } |
| 1346 | } |
| 1347 | else if (operand->flags & MN10300_OPERAND_SP) |
| 1348 | { |
| 1349 | char *start; |
| 1350 | char c = get_symbol_name (&start); |
| 1351 | |
| 1352 | if (strcasecmp (start, "sp") != 0) |
| 1353 | { |
| 1354 | (void) restore_line_pointer (c); |
| 1355 | input_line_pointer = hold; |
| 1356 | str = hold; |
| 1357 | goto error; |
| 1358 | } |
| 1359 | (void) restore_line_pointer (c); |
| 1360 | goto keep_going; |
| 1361 | } |
| 1362 | else if (operand->flags & MN10300_OPERAND_RREG) |
| 1363 | { |
| 1364 | if (!r_register_name (&ex)) |
| 1365 | { |
| 1366 | input_line_pointer = hold; |
| 1367 | str = hold; |
| 1368 | goto error; |
| 1369 | } |
| 1370 | } |
| 1371 | else if (operand->flags & MN10300_OPERAND_XRREG) |
| 1372 | { |
| 1373 | if (!xr_register_name (&ex)) |
| 1374 | { |
| 1375 | input_line_pointer = hold; |
| 1376 | str = hold; |
| 1377 | goto error; |
| 1378 | } |
| 1379 | } |
| 1380 | else if (operand->flags & MN10300_OPERAND_FSREG) |
| 1381 | { |
| 1382 | if (!float_register_name (&ex)) |
| 1383 | { |
| 1384 | input_line_pointer = hold; |
| 1385 | str = hold; |
| 1386 | goto error; |
| 1387 | } |
| 1388 | } |
| 1389 | else if (operand->flags & MN10300_OPERAND_FDREG) |
| 1390 | { |
| 1391 | if (!double_register_name (&ex)) |
| 1392 | { |
| 1393 | input_line_pointer = hold; |
| 1394 | str = hold; |
| 1395 | goto error; |
| 1396 | } |
| 1397 | } |
| 1398 | else if (operand->flags & MN10300_OPERAND_FPCR) |
| 1399 | { |
| 1400 | char *start; |
| 1401 | char c = get_symbol_name (&start); |
| 1402 | |
| 1403 | if (strcasecmp (start, "fpcr") != 0) |
| 1404 | { |
| 1405 | (void) restore_line_pointer (c); |
| 1406 | input_line_pointer = hold; |
| 1407 | str = hold; |
| 1408 | goto error; |
| 1409 | } |
| 1410 | (void) restore_line_pointer (c); |
| 1411 | goto keep_going; |
| 1412 | } |
| 1413 | else if (operand->flags & MN10300_OPERAND_USP) |
| 1414 | { |
| 1415 | char *start; |
| 1416 | char c = get_symbol_name (&start); |
| 1417 | |
| 1418 | if (strcasecmp (start, "usp") != 0) |
| 1419 | { |
| 1420 | (void) restore_line_pointer (c); |
| 1421 | input_line_pointer = hold; |
| 1422 | str = hold; |
| 1423 | goto error; |
| 1424 | } |
| 1425 | (void) restore_line_pointer (c); |
| 1426 | goto keep_going; |
| 1427 | } |
| 1428 | else if (operand->flags & MN10300_OPERAND_SSP) |
| 1429 | { |
| 1430 | char *start; |
| 1431 | char c = get_symbol_name (&start); |
| 1432 | |
| 1433 | if (strcasecmp (start, "ssp") != 0) |
| 1434 | { |
| 1435 | (void) restore_line_pointer (c); |
| 1436 | input_line_pointer = hold; |
| 1437 | str = hold; |
| 1438 | goto error; |
| 1439 | } |
| 1440 | (void) restore_line_pointer (c); |
| 1441 | goto keep_going; |
| 1442 | } |
| 1443 | else if (operand->flags & MN10300_OPERAND_MSP) |
| 1444 | { |
| 1445 | char *start; |
| 1446 | char c = get_symbol_name (&start); |
| 1447 | |
| 1448 | if (strcasecmp (start, "msp") != 0) |
| 1449 | { |
| 1450 | (void) restore_line_pointer (c); |
| 1451 | input_line_pointer = hold; |
| 1452 | str = hold; |
| 1453 | goto error; |
| 1454 | } |
| 1455 | (void) restore_line_pointer (c); |
| 1456 | goto keep_going; |
| 1457 | } |
| 1458 | else if (operand->flags & MN10300_OPERAND_PC) |
| 1459 | { |
| 1460 | char *start; |
| 1461 | char c = get_symbol_name (&start); |
| 1462 | |
| 1463 | if (strcasecmp (start, "pc") != 0) |
| 1464 | { |
| 1465 | (void) restore_line_pointer (c); |
| 1466 | input_line_pointer = hold; |
| 1467 | str = hold; |
| 1468 | goto error; |
| 1469 | } |
| 1470 | (void) restore_line_pointer (c); |
| 1471 | goto keep_going; |
| 1472 | } |
| 1473 | else if (operand->flags & MN10300_OPERAND_EPSW) |
| 1474 | { |
| 1475 | char *start; |
| 1476 | char c = get_symbol_name (&start); |
| 1477 | |
| 1478 | if (strcasecmp (start, "epsw") != 0) |
| 1479 | { |
| 1480 | (void) restore_line_pointer (c); |
| 1481 | input_line_pointer = hold; |
| 1482 | str = hold; |
| 1483 | goto error; |
| 1484 | } |
| 1485 | (void) restore_line_pointer (c); |
| 1486 | goto keep_going; |
| 1487 | } |
| 1488 | else if (operand->flags & MN10300_OPERAND_PLUS) |
| 1489 | { |
| 1490 | if (*input_line_pointer != '+') |
| 1491 | { |
| 1492 | input_line_pointer = hold; |
| 1493 | str = hold; |
| 1494 | goto error; |
| 1495 | } |
| 1496 | input_line_pointer++; |
| 1497 | goto keep_going; |
| 1498 | } |
| 1499 | else if (operand->flags & MN10300_OPERAND_PSW) |
| 1500 | { |
| 1501 | char *start; |
| 1502 | char c = get_symbol_name (&start); |
| 1503 | |
| 1504 | if (strcasecmp (start, "psw") != 0) |
| 1505 | { |
| 1506 | (void) restore_line_pointer (c); |
| 1507 | input_line_pointer = hold; |
| 1508 | str = hold; |
| 1509 | goto error; |
| 1510 | } |
| 1511 | (void) restore_line_pointer (c); |
| 1512 | goto keep_going; |
| 1513 | } |
| 1514 | else if (operand->flags & MN10300_OPERAND_MDR) |
| 1515 | { |
| 1516 | char *start; |
| 1517 | char c = get_symbol_name (&start); |
| 1518 | |
| 1519 | if (strcasecmp (start, "mdr") != 0) |
| 1520 | { |
| 1521 | (void) restore_line_pointer (c); |
| 1522 | input_line_pointer = hold; |
| 1523 | str = hold; |
| 1524 | goto error; |
| 1525 | } |
| 1526 | (void) restore_line_pointer (c); |
| 1527 | goto keep_going; |
| 1528 | } |
| 1529 | else if (operand->flags & MN10300_OPERAND_REG_LIST) |
| 1530 | { |
| 1531 | unsigned int value = 0; |
| 1532 | if (*input_line_pointer != '[') |
| 1533 | { |
| 1534 | input_line_pointer = hold; |
| 1535 | str = hold; |
| 1536 | goto error; |
| 1537 | } |
| 1538 | |
| 1539 | /* Eat the '['. */ |
| 1540 | input_line_pointer++; |
| 1541 | |
| 1542 | /* We used to reject a null register list here; however, |
| 1543 | we accept it now so the compiler can emit "call" |
| 1544 | instructions for all calls to named functions. |
| 1545 | |
| 1546 | The linker can then fill in the appropriate bits for the |
| 1547 | register list and stack size or change the instruction |
| 1548 | into a "calls" if using "call" is not profitable. */ |
| 1549 | while (*input_line_pointer != ']') |
| 1550 | { |
| 1551 | char *start; |
| 1552 | char c; |
| 1553 | |
| 1554 | if (*input_line_pointer == ',') |
| 1555 | input_line_pointer++; |
| 1556 | |
| 1557 | c = get_symbol_name (&start); |
| 1558 | |
| 1559 | if (strcasecmp (start, "d2") == 0) |
| 1560 | { |
| 1561 | value |= 0x80; |
| 1562 | (void) restore_line_pointer (c); |
| 1563 | } |
| 1564 | else if (strcasecmp (start, "d3") == 0) |
| 1565 | { |
| 1566 | value |= 0x40; |
| 1567 | (void) restore_line_pointer (c); |
| 1568 | } |
| 1569 | else if (strcasecmp (start, "a2") == 0) |
| 1570 | { |
| 1571 | value |= 0x20; |
| 1572 | (void) restore_line_pointer (c); |
| 1573 | } |
| 1574 | else if (strcasecmp (start, "a3") == 0) |
| 1575 | { |
| 1576 | value |= 0x10; |
| 1577 | (void) restore_line_pointer (c); |
| 1578 | } |
| 1579 | else if (strcasecmp (start, "other") == 0) |
| 1580 | { |
| 1581 | value |= 0x08; |
| 1582 | (void) restore_line_pointer (c); |
| 1583 | } |
| 1584 | else if (HAVE_AM33 |
| 1585 | && strcasecmp (start, "exreg0") == 0) |
| 1586 | { |
| 1587 | value |= 0x04; |
| 1588 | (void) restore_line_pointer (c); |
| 1589 | } |
| 1590 | else if (HAVE_AM33 |
| 1591 | && strcasecmp (start, "exreg1") == 0) |
| 1592 | { |
| 1593 | value |= 0x02; |
| 1594 | (void) restore_line_pointer (c); |
| 1595 | } |
| 1596 | else if (HAVE_AM33 |
| 1597 | && strcasecmp (start, "exother") == 0) |
| 1598 | { |
| 1599 | value |= 0x01; |
| 1600 | (void) restore_line_pointer (c); |
| 1601 | } |
| 1602 | else if (HAVE_AM33 |
| 1603 | && strcasecmp (start, "all") == 0) |
| 1604 | { |
| 1605 | value |= 0xff; |
| 1606 | (void) restore_line_pointer (c); |
| 1607 | } |
| 1608 | else |
| 1609 | { |
| 1610 | input_line_pointer = hold; |
| 1611 | str = hold; |
| 1612 | goto error; |
| 1613 | } |
| 1614 | } |
| 1615 | input_line_pointer++; |
| 1616 | mn10300_insert_operand (& insn, & extension, operand, |
| 1617 | value, NULL, 0, 0); |
| 1618 | goto keep_going; |
| 1619 | |
| 1620 | } |
| 1621 | else if (data_register_name (&ex)) |
| 1622 | { |
| 1623 | input_line_pointer = hold; |
| 1624 | str = hold; |
| 1625 | goto error; |
| 1626 | } |
| 1627 | else if (address_register_name (&ex)) |
| 1628 | { |
| 1629 | input_line_pointer = hold; |
| 1630 | str = hold; |
| 1631 | goto error; |
| 1632 | } |
| 1633 | else if (other_register_name (&ex)) |
| 1634 | { |
| 1635 | input_line_pointer = hold; |
| 1636 | str = hold; |
| 1637 | goto error; |
| 1638 | } |
| 1639 | else if (HAVE_AM33 && r_register_name (&ex)) |
| 1640 | { |
| 1641 | input_line_pointer = hold; |
| 1642 | str = hold; |
| 1643 | goto error; |
| 1644 | } |
| 1645 | else if (HAVE_AM33 && xr_register_name (&ex)) |
| 1646 | { |
| 1647 | input_line_pointer = hold; |
| 1648 | str = hold; |
| 1649 | goto error; |
| 1650 | } |
| 1651 | else if (HAVE_AM33_2 && float_register_name (&ex)) |
| 1652 | { |
| 1653 | input_line_pointer = hold; |
| 1654 | str = hold; |
| 1655 | goto error; |
| 1656 | } |
| 1657 | else if (HAVE_AM33_2 && double_register_name (&ex)) |
| 1658 | { |
| 1659 | input_line_pointer = hold; |
| 1660 | str = hold; |
| 1661 | goto error; |
| 1662 | } |
| 1663 | else if (*str == ')' || *str == '(') |
| 1664 | { |
| 1665 | input_line_pointer = hold; |
| 1666 | str = hold; |
| 1667 | goto error; |
| 1668 | } |
| 1669 | else |
| 1670 | { |
| 1671 | expression (&ex); |
| 1672 | } |
| 1673 | |
| 1674 | switch (ex.X_op) |
| 1675 | { |
| 1676 | case O_illegal: |
| 1677 | errmsg = _("illegal operand"); |
| 1678 | goto error; |
| 1679 | case O_absent: |
| 1680 | errmsg = _("missing operand"); |
| 1681 | goto error; |
| 1682 | case O_register: |
| 1683 | { |
| 1684 | int mask; |
| 1685 | |
| 1686 | mask = MN10300_OPERAND_DREG | MN10300_OPERAND_AREG; |
| 1687 | if (HAVE_AM33) |
| 1688 | mask |= MN10300_OPERAND_RREG | MN10300_OPERAND_XRREG; |
| 1689 | if (HAVE_AM33_2) |
| 1690 | mask |= MN10300_OPERAND_FSREG | MN10300_OPERAND_FDREG; |
| 1691 | if ((operand->flags & mask) == 0) |
| 1692 | { |
| 1693 | input_line_pointer = hold; |
| 1694 | str = hold; |
| 1695 | goto error; |
| 1696 | } |
| 1697 | |
| 1698 | if (opcode->format == FMT_D1 || opcode->format == FMT_S1) |
| 1699 | extra_shift = 8; |
| 1700 | else if (opcode->format == FMT_D2 |
| 1701 | || opcode->format == FMT_D4 |
| 1702 | || opcode->format == FMT_S2 |
| 1703 | || opcode->format == FMT_S4 |
| 1704 | || opcode->format == FMT_S6 |
| 1705 | || opcode->format == FMT_D5) |
| 1706 | extra_shift = 16; |
| 1707 | else if (opcode->format == FMT_D7) |
| 1708 | extra_shift = 8; |
| 1709 | else if (opcode->format == FMT_D8 || opcode->format == FMT_D9) |
| 1710 | extra_shift = 8; |
| 1711 | else |
| 1712 | extra_shift = 0; |
| 1713 | |
| 1714 | mn10300_insert_operand (& insn, & extension, operand, |
| 1715 | ex.X_add_number, NULL, |
| 1716 | 0, extra_shift); |
| 1717 | |
| 1718 | /* And note the register number in the register array. */ |
| 1719 | mn10300_reg_operands[op_idx - 1] = ex.X_add_number; |
| 1720 | break; |
| 1721 | } |
| 1722 | |
| 1723 | case O_constant: |
| 1724 | /* If this operand can be promoted, and it doesn't |
| 1725 | fit into the allocated bitfield for this insn, |
| 1726 | then promote it (ie this opcode does not match). */ |
| 1727 | if (operand->flags |
| 1728 | & (MN10300_OPERAND_PROMOTE | MN10300_OPERAND_RELAX) |
| 1729 | && !check_operand (operand, ex.X_add_number)) |
| 1730 | { |
| 1731 | input_line_pointer = hold; |
| 1732 | str = hold; |
| 1733 | goto error; |
| 1734 | } |
| 1735 | |
| 1736 | mn10300_insert_operand (& insn, & extension, operand, |
| 1737 | ex.X_add_number, NULL, 0, 0); |
| 1738 | break; |
| 1739 | |
| 1740 | default: |
| 1741 | /* If this operand can be promoted, then this opcode didn't |
| 1742 | match since we can't know if it needed promotion! */ |
| 1743 | if (operand->flags & MN10300_OPERAND_PROMOTE) |
| 1744 | { |
| 1745 | input_line_pointer = hold; |
| 1746 | str = hold; |
| 1747 | goto error; |
| 1748 | } |
| 1749 | |
| 1750 | /* We need to generate a fixup for this expression. */ |
| 1751 | if (fc >= MAX_INSN_FIXUPS) |
| 1752 | as_fatal (_("too many fixups")); |
| 1753 | fixups[fc].exp = ex; |
| 1754 | fixups[fc].opindex = *opindex_ptr; |
| 1755 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 1756 | if (mn10300_check_fixup (& fixups[fc])) |
| 1757 | goto error; |
| 1758 | ++fc; |
| 1759 | break; |
| 1760 | } |
| 1761 | |
| 1762 | keep_going: |
| 1763 | str = input_line_pointer; |
| 1764 | input_line_pointer = hold; |
| 1765 | |
| 1766 | while (*str == ' ' || *str == ',') |
| 1767 | ++str; |
| 1768 | } |
| 1769 | |
| 1770 | /* Make sure we used all the operands! */ |
| 1771 | if (*str != ',') |
| 1772 | match = 1; |
| 1773 | |
| 1774 | /* If this instruction has registers that must not match, verify |
| 1775 | that they do indeed not match. */ |
| 1776 | if (opcode->no_match_operands) |
| 1777 | { |
| 1778 | /* Look at each operand to see if it's marked. */ |
| 1779 | for (i = 0; i < MN10300_MAX_OPERANDS; i++) |
| 1780 | { |
| 1781 | if ((1 << i) & opcode->no_match_operands) |
| 1782 | { |
| 1783 | int j; |
| 1784 | |
| 1785 | /* operand I is marked. Check that it does not match any |
| 1786 | operands > I which are marked. */ |
| 1787 | for (j = i + 1; j < MN10300_MAX_OPERANDS; j++) |
| 1788 | { |
| 1789 | if (((1 << j) & opcode->no_match_operands) |
| 1790 | && mn10300_reg_operands[i] == mn10300_reg_operands[j]) |
| 1791 | { |
| 1792 | errmsg = _("Invalid register specification."); |
| 1793 | match = 0; |
| 1794 | goto error; |
| 1795 | } |
| 1796 | } |
| 1797 | } |
| 1798 | } |
| 1799 | } |
| 1800 | |
| 1801 | error: |
| 1802 | if (match == 0) |
| 1803 | { |
| 1804 | next_opcode = opcode + 1; |
| 1805 | if (!strcmp (next_opcode->name, opcode->name)) |
| 1806 | { |
| 1807 | opcode = next_opcode; |
| 1808 | continue; |
| 1809 | } |
| 1810 | |
| 1811 | as_bad ("%s", errmsg); |
| 1812 | return; |
| 1813 | } |
| 1814 | break; |
| 1815 | } |
| 1816 | |
| 1817 | while (ISSPACE (*str)) |
| 1818 | ++str; |
| 1819 | |
| 1820 | if (*str != '\0') |
| 1821 | as_bad (_("junk at end of line: `%s'"), str); |
| 1822 | |
| 1823 | input_line_pointer = str; |
| 1824 | |
| 1825 | /* Determine the size of the instruction. */ |
| 1826 | if (opcode->format == FMT_S0) |
| 1827 | size = 1; |
| 1828 | |
| 1829 | if (opcode->format == FMT_S1 || opcode->format == FMT_D0) |
| 1830 | size = 2; |
| 1831 | |
| 1832 | if (opcode->format == FMT_S2 || opcode->format == FMT_D1) |
| 1833 | size = 3; |
| 1834 | |
| 1835 | if (opcode->format == FMT_D6) |
| 1836 | size = 3; |
| 1837 | |
| 1838 | if (opcode->format == FMT_D7 || opcode->format == FMT_D10) |
| 1839 | size = 4; |
| 1840 | |
| 1841 | if (opcode->format == FMT_D8) |
| 1842 | size = 6; |
| 1843 | |
| 1844 | if (opcode->format == FMT_D9) |
| 1845 | size = 7; |
| 1846 | |
| 1847 | if (opcode->format == FMT_S4) |
| 1848 | size = 5; |
| 1849 | |
| 1850 | if (opcode->format == FMT_S6 || opcode->format == FMT_D5) |
| 1851 | size = 7; |
| 1852 | |
| 1853 | if (opcode->format == FMT_D2) |
| 1854 | size = 4; |
| 1855 | |
| 1856 | if (opcode->format == FMT_D3) |
| 1857 | size = 5; |
| 1858 | |
| 1859 | if (opcode->format == FMT_D4) |
| 1860 | size = 6; |
| 1861 | |
| 1862 | if (relaxable && fc > 0) |
| 1863 | { |
| 1864 | /* On a 64-bit host the size of an 'int' is not the same |
| 1865 | as the size of a pointer, so we need a union to convert |
| 1866 | the opindex field of the fr_cgen structure into a char * |
| 1867 | so that it can be stored in the frag. We do not have |
| 1868 | to worry about losing accuracy as we are not going to |
| 1869 | be even close to the 32bit limit of the int. */ |
| 1870 | union |
| 1871 | { |
| 1872 | int opindex; |
| 1873 | char * ptr; |
| 1874 | } |
| 1875 | opindex_converter; |
| 1876 | int type; |
| 1877 | |
| 1878 | /* We want to anchor the line info to the previous frag (if |
| 1879 | there isn't one, create it), so that, when the insn is |
| 1880 | resized, we still get the right address for the beginning of |
| 1881 | the region. */ |
| 1882 | f = frag_more (0); |
| 1883 | dwarf2_emit_insn (0); |
| 1884 | |
| 1885 | /* bCC */ |
| 1886 | if (size == 2) |
| 1887 | { |
| 1888 | /* Handle bra specially. Basically treat it like jmp so |
| 1889 | that we automatically handle 8, 16 and 32 bit offsets |
| 1890 | correctly as well as jumps to an undefined address. |
| 1891 | |
| 1892 | It is also important to not treat it like other bCC |
| 1893 | instructions since the long forms of bra is different |
| 1894 | from other bCC instructions. */ |
| 1895 | if (opcode->opcode == 0xca00) |
| 1896 | type = 10; |
| 1897 | else |
| 1898 | type = 0; |
| 1899 | } |
| 1900 | /* call */ |
| 1901 | else if (size == 5) |
| 1902 | type = 6; |
| 1903 | /* calls */ |
| 1904 | else if (size == 4) |
| 1905 | type = 8; |
| 1906 | /* jmp */ |
| 1907 | else if (size == 3 && opcode->opcode == 0xcc0000) |
| 1908 | type = 10; |
| 1909 | else if (size == 3 && (opcode->opcode & 0xfff000) == 0xf8d000) |
| 1910 | type = 13; |
| 1911 | /* bCC (uncommon cases) */ |
| 1912 | else |
| 1913 | type = 3; |
| 1914 | |
| 1915 | opindex_converter.opindex = fixups[0].opindex; |
| 1916 | f = frag_var (rs_machine_dependent, 8, 8 - size, type, |
| 1917 | fixups[0].exp.X_add_symbol, |
| 1918 | fixups[0].exp.X_add_number, |
| 1919 | opindex_converter.ptr); |
| 1920 | |
| 1921 | /* This is pretty hokey. We basically just care about the |
| 1922 | opcode, so we have to write out the first word big endian. |
| 1923 | |
| 1924 | The exception is "call", which has two operands that we |
| 1925 | care about. |
| 1926 | |
| 1927 | The first operand (the register list) happens to be in the |
| 1928 | first instruction word, and will be in the right place if |
| 1929 | we output the first word in big endian mode. |
| 1930 | |
| 1931 | The second operand (stack size) is in the extension word, |
| 1932 | and we want it to appear as the first character in the extension |
| 1933 | word (as it appears in memory). Luckily, writing the extension |
| 1934 | word in big endian format will do what we want. */ |
| 1935 | number_to_chars_bigendian (f, insn, size > 4 ? 4 : size); |
| 1936 | if (size > 8) |
| 1937 | { |
| 1938 | number_to_chars_bigendian (f + 4, extension, 4); |
| 1939 | number_to_chars_bigendian (f + 8, 0, size - 8); |
| 1940 | } |
| 1941 | else if (size > 4) |
| 1942 | number_to_chars_bigendian (f + 4, extension, size - 4); |
| 1943 | } |
| 1944 | else |
| 1945 | { |
| 1946 | /* Allocate space for the instruction. */ |
| 1947 | f = frag_more (size); |
| 1948 | |
| 1949 | /* Fill in bytes for the instruction. Note that opcode fields |
| 1950 | are written big-endian, 16 & 32bit immediates are written |
| 1951 | little endian. Egad. */ |
| 1952 | if (opcode->format == FMT_S0 |
| 1953 | || opcode->format == FMT_S1 |
| 1954 | || opcode->format == FMT_D0 |
| 1955 | || opcode->format == FMT_D6 |
| 1956 | || opcode->format == FMT_D7 |
| 1957 | || opcode->format == FMT_D10 |
| 1958 | || opcode->format == FMT_D1) |
| 1959 | { |
| 1960 | number_to_chars_bigendian (f, insn, size); |
| 1961 | } |
| 1962 | else if (opcode->format == FMT_S2 |
| 1963 | && opcode->opcode != 0xdf0000 |
| 1964 | && opcode->opcode != 0xde0000) |
| 1965 | { |
| 1966 | /* A format S2 instruction that is _not_ "ret" and "retf". */ |
| 1967 | number_to_chars_bigendian (f, (insn >> 16) & 0xff, 1); |
| 1968 | number_to_chars_littleendian (f + 1, insn & 0xffff, 2); |
| 1969 | } |
| 1970 | else if (opcode->format == FMT_S2) |
| 1971 | { |
| 1972 | /* This must be a ret or retf, which is written entirely in |
| 1973 | big-endian format. */ |
| 1974 | number_to_chars_bigendian (f, insn, 3); |
| 1975 | } |
| 1976 | else if (opcode->format == FMT_S4 |
| 1977 | && opcode->opcode != 0xdc000000) |
| 1978 | { |
| 1979 | /* This must be a format S4 "call" instruction. What a pain. */ |
| 1980 | unsigned long temp = (insn >> 8) & 0xffff; |
| 1981 | number_to_chars_bigendian (f, (insn >> 24) & 0xff, 1); |
| 1982 | number_to_chars_littleendian (f + 1, temp, 2); |
| 1983 | number_to_chars_bigendian (f + 3, insn & 0xff, 1); |
| 1984 | number_to_chars_bigendian (f + 4, extension & 0xff, 1); |
| 1985 | } |
| 1986 | else if (opcode->format == FMT_S4) |
| 1987 | { |
| 1988 | /* This must be a format S4 "jmp" instruction. */ |
| 1989 | unsigned long temp = ((insn & 0xffffff) << 8) | (extension & 0xff); |
| 1990 | number_to_chars_bigendian (f, (insn >> 24) & 0xff, 1); |
| 1991 | number_to_chars_littleendian (f + 1, temp, 4); |
| 1992 | } |
| 1993 | else if (opcode->format == FMT_S6) |
| 1994 | { |
| 1995 | unsigned long temp = ((insn & 0xffffff) << 8) |
| 1996 | | ((extension >> 16) & 0xff); |
| 1997 | number_to_chars_bigendian (f, (insn >> 24) & 0xff, 1); |
| 1998 | number_to_chars_littleendian (f + 1, temp, 4); |
| 1999 | number_to_chars_bigendian (f + 5, (extension >> 8) & 0xff, 1); |
| 2000 | number_to_chars_bigendian (f + 6, extension & 0xff, 1); |
| 2001 | } |
| 2002 | else if (opcode->format == FMT_D2 |
| 2003 | && opcode->opcode != 0xfaf80000 |
| 2004 | && opcode->opcode != 0xfaf00000 |
| 2005 | && opcode->opcode != 0xfaf40000) |
| 2006 | { |
| 2007 | /* A format D2 instruction where the 16bit immediate is |
| 2008 | really a single 16bit value, not two 8bit values. */ |
| 2009 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 2010 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 2011 | } |
| 2012 | else if (opcode->format == FMT_D2) |
| 2013 | { |
| 2014 | /* A format D2 instruction where the 16bit immediate |
| 2015 | is really two 8bit immediates. */ |
| 2016 | number_to_chars_bigendian (f, insn, 4); |
| 2017 | } |
| 2018 | else if (opcode->format == FMT_D3) |
| 2019 | { |
| 2020 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 2021 | number_to_chars_littleendian (f + 2, insn & 0xffff, 2); |
| 2022 | number_to_chars_bigendian (f + 4, extension & 0xff, 1); |
| 2023 | } |
| 2024 | else if (opcode->format == FMT_D4) |
| 2025 | { |
| 2026 | unsigned long temp = ((insn & 0xffff) << 16) | (extension & 0xffff); |
| 2027 | |
| 2028 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 2029 | number_to_chars_littleendian (f + 2, temp, 4); |
| 2030 | } |
| 2031 | else if (opcode->format == FMT_D5) |
| 2032 | { |
| 2033 | unsigned long temp = (((insn & 0xffff) << 16) |
| 2034 | | ((extension >> 8) & 0xffff)); |
| 2035 | |
| 2036 | number_to_chars_bigendian (f, (insn >> 16) & 0xffff, 2); |
| 2037 | number_to_chars_littleendian (f + 2, temp, 4); |
| 2038 | number_to_chars_bigendian (f + 6, extension & 0xff, 1); |
| 2039 | } |
| 2040 | else if (opcode->format == FMT_D8) |
| 2041 | { |
| 2042 | unsigned long temp = ((insn & 0xff) << 16) | (extension & 0xffff); |
| 2043 | |
| 2044 | number_to_chars_bigendian (f, (insn >> 8) & 0xffffff, 3); |
| 2045 | number_to_chars_bigendian (f + 3, (temp & 0xff), 1); |
| 2046 | number_to_chars_littleendian (f + 4, temp >> 8, 2); |
| 2047 | } |
| 2048 | else if (opcode->format == FMT_D9) |
| 2049 | { |
| 2050 | unsigned long temp = ((insn & 0xff) << 24) | (extension & 0xffffff); |
| 2051 | |
| 2052 | number_to_chars_bigendian (f, (insn >> 8) & 0xffffff, 3); |
| 2053 | number_to_chars_littleendian (f + 3, temp, 4); |
| 2054 | } |
| 2055 | |
| 2056 | /* Create any fixups. */ |
| 2057 | for (i = 0; i < fc; i++) |
| 2058 | { |
| 2059 | const struct mn10300_operand *operand; |
| 2060 | int reloc_size; |
| 2061 | |
| 2062 | operand = &mn10300_operands[fixups[i].opindex]; |
| 2063 | if (fixups[i].reloc != BFD_RELOC_UNUSED |
| 2064 | && fixups[i].reloc != BFD_RELOC_32_GOT_PCREL |
| 2065 | && fixups[i].reloc != BFD_RELOC_32_GOTOFF |
| 2066 | && fixups[i].reloc != BFD_RELOC_32_PLT_PCREL |
| 2067 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_GD |
| 2068 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_LD |
| 2069 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_LDO |
| 2070 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_GOTIE |
| 2071 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_IE |
| 2072 | && fixups[i].reloc != BFD_RELOC_MN10300_TLS_LE |
| 2073 | && fixups[i].reloc != BFD_RELOC_MN10300_GOT32) |
| 2074 | { |
| 2075 | reloc_howto_type *reloc_howto; |
| 2076 | int offset; |
| 2077 | |
| 2078 | reloc_howto = bfd_reloc_type_lookup (stdoutput, |
| 2079 | fixups[i].reloc); |
| 2080 | |
| 2081 | if (!reloc_howto) |
| 2082 | abort (); |
| 2083 | |
| 2084 | reloc_size = bfd_get_reloc_size (reloc_howto); |
| 2085 | |
| 2086 | if (reloc_size < 1 || reloc_size > 4) |
| 2087 | abort (); |
| 2088 | |
| 2089 | offset = 4 - size; |
| 2090 | fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 2091 | reloc_size, &fixups[i].exp, |
| 2092 | reloc_howto->pc_relative, |
| 2093 | fixups[i].reloc); |
| 2094 | } |
| 2095 | else |
| 2096 | { |
| 2097 | int reloc, pcrel, offset; |
| 2098 | fixS *fixP; |
| 2099 | |
| 2100 | reloc = BFD_RELOC_NONE; |
| 2101 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 2102 | reloc = fixups[i].reloc; |
| 2103 | /* How big is the reloc? Remember SPLIT relocs are |
| 2104 | implicitly 32bits. */ |
| 2105 | if ((operand->flags & MN10300_OPERAND_SPLIT) != 0) |
| 2106 | reloc_size = 32; |
| 2107 | else if ((operand->flags & MN10300_OPERAND_24BIT) != 0) |
| 2108 | reloc_size = 24; |
| 2109 | else |
| 2110 | reloc_size = operand->bits; |
| 2111 | |
| 2112 | /* Is the reloc pc-relative? */ |
| 2113 | pcrel = (operand->flags & MN10300_OPERAND_PCREL) != 0; |
| 2114 | if (reloc != BFD_RELOC_NONE) |
| 2115 | pcrel = bfd_reloc_type_lookup (stdoutput, reloc)->pc_relative; |
| 2116 | |
| 2117 | offset = size - (reloc_size + operand->shift) / 8; |
| 2118 | |
| 2119 | /* Choose a proper BFD relocation type. */ |
| 2120 | if (reloc != BFD_RELOC_NONE) |
| 2121 | ; |
| 2122 | else if (pcrel) |
| 2123 | { |
| 2124 | if (reloc_size == 32) |
| 2125 | reloc = BFD_RELOC_32_PCREL; |
| 2126 | else if (reloc_size == 16) |
| 2127 | reloc = BFD_RELOC_16_PCREL; |
| 2128 | else if (reloc_size == 8) |
| 2129 | reloc = BFD_RELOC_8_PCREL; |
| 2130 | else |
| 2131 | abort (); |
| 2132 | } |
| 2133 | else |
| 2134 | { |
| 2135 | if (reloc_size == 32) |
| 2136 | reloc = BFD_RELOC_32; |
| 2137 | else if (reloc_size == 16) |
| 2138 | reloc = BFD_RELOC_16; |
| 2139 | else if (reloc_size == 8) |
| 2140 | reloc = BFD_RELOC_8; |
| 2141 | else |
| 2142 | abort (); |
| 2143 | } |
| 2144 | |
| 2145 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, |
| 2146 | reloc_size / 8, &fixups[i].exp, pcrel, |
| 2147 | ((bfd_reloc_code_real_type) reloc)); |
| 2148 | |
| 2149 | if (pcrel) |
| 2150 | fixP->fx_offset += offset; |
| 2151 | } |
| 2152 | } |
| 2153 | |
| 2154 | dwarf2_emit_insn (size); |
| 2155 | } |
| 2156 | |
| 2157 | /* Label this frag as one that contains instructions. */ |
| 2158 | frag_now->tc_frag_data = TRUE; |
| 2159 | } |
| 2160 | |
| 2161 | /* If while processing a fixup, a reloc really needs to be created |
| 2162 | then it is done here. */ |
| 2163 | |
| 2164 | arelent ** |
| 2165 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED, fixS *fixp) |
| 2166 | { |
| 2167 | static arelent * no_relocs = NULL; |
| 2168 | static arelent * relocs[MAX_RELOC_EXPANSION + 1]; |
| 2169 | arelent *reloc; |
| 2170 | |
| 2171 | reloc = XNEW (arelent); |
| 2172 | |
| 2173 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 2174 | if (reloc->howto == NULL) |
| 2175 | { |
| 2176 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 2177 | _("reloc %d not supported by object file format"), |
| 2178 | (int) fixp->fx_r_type); |
| 2179 | free (reloc); |
| 2180 | return & no_relocs; |
| 2181 | } |
| 2182 | |
| 2183 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 2184 | relocs[0] = reloc; |
| 2185 | relocs[1] = NULL; |
| 2186 | |
| 2187 | if (fixp->fx_subsy |
| 2188 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 2189 | { |
| 2190 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); |
| 2191 | fixp->fx_subsy = NULL; |
| 2192 | } |
| 2193 | |
| 2194 | if (fixp->fx_addsy && fixp->fx_subsy) |
| 2195 | { |
| 2196 | asection *asec, *ssec; |
| 2197 | |
| 2198 | asec = S_GET_SEGMENT (fixp->fx_addsy); |
| 2199 | ssec = S_GET_SEGMENT (fixp->fx_subsy); |
| 2200 | |
| 2201 | /* If we have a difference between two (non-absolute) symbols we must |
| 2202 | generate two relocs (one for each symbol) and allow the linker to |
| 2203 | resolve them - relaxation may change the distances between symbols, |
| 2204 | even local symbols defined in the same section. */ |
| 2205 | if (ssec != absolute_section || asec != absolute_section) |
| 2206 | { |
| 2207 | arelent * reloc2 = XNEW (arelent); |
| 2208 | |
| 2209 | relocs[0] = reloc2; |
| 2210 | relocs[1] = reloc; |
| 2211 | |
| 2212 | reloc2->address = reloc->address; |
| 2213 | reloc2->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_MN10300_SYM_DIFF); |
| 2214 | reloc2->addend = - S_GET_VALUE (fixp->fx_subsy); |
| 2215 | reloc2->sym_ptr_ptr = XNEW (asymbol *); |
| 2216 | *reloc2->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_subsy); |
| 2217 | |
| 2218 | reloc->addend = fixp->fx_offset; |
| 2219 | if (asec == absolute_section) |
| 2220 | { |
| 2221 | reloc->addend += S_GET_VALUE (fixp->fx_addsy); |
| 2222 | reloc->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr; |
| 2223 | } |
| 2224 | else |
| 2225 | { |
| 2226 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 2227 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 2228 | } |
| 2229 | |
| 2230 | fixp->fx_pcrel = 0; |
| 2231 | fixp->fx_done = 1; |
| 2232 | return relocs; |
| 2233 | } |
| 2234 | else |
| 2235 | { |
| 2236 | char *fixpos = fixp->fx_where + fixp->fx_frag->fr_literal; |
| 2237 | |
| 2238 | reloc->addend = (S_GET_VALUE (fixp->fx_addsy) |
| 2239 | - S_GET_VALUE (fixp->fx_subsy) + fixp->fx_offset); |
| 2240 | |
| 2241 | switch (fixp->fx_r_type) |
| 2242 | { |
| 2243 | case BFD_RELOC_8: |
| 2244 | md_number_to_chars (fixpos, reloc->addend, 1); |
| 2245 | break; |
| 2246 | |
| 2247 | case BFD_RELOC_16: |
| 2248 | md_number_to_chars (fixpos, reloc->addend, 2); |
| 2249 | break; |
| 2250 | |
| 2251 | case BFD_RELOC_24: |
| 2252 | md_number_to_chars (fixpos, reloc->addend, 3); |
| 2253 | break; |
| 2254 | |
| 2255 | case BFD_RELOC_32: |
| 2256 | md_number_to_chars (fixpos, reloc->addend, 4); |
| 2257 | break; |
| 2258 | |
| 2259 | default: |
| 2260 | reloc->sym_ptr_ptr |
| 2261 | = (asymbol **) bfd_abs_section_ptr->symbol_ptr_ptr; |
| 2262 | return relocs; |
| 2263 | } |
| 2264 | |
| 2265 | free (reloc); |
| 2266 | return & no_relocs; |
| 2267 | } |
| 2268 | } |
| 2269 | else |
| 2270 | { |
| 2271 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 2272 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 2273 | reloc->addend = fixp->fx_offset; |
| 2274 | } |
| 2275 | return relocs; |
| 2276 | } |
| 2277 | |
| 2278 | /* Returns true iff the symbol attached to the frag is at a known location |
| 2279 | in the given section, (and hence the relocation to it can be relaxed by |
| 2280 | the assembler). */ |
| 2281 | static inline bfd_boolean |
| 2282 | has_known_symbol_location (fragS * fragp, asection * sec) |
| 2283 | { |
| 2284 | symbolS * sym = fragp->fr_symbol; |
| 2285 | |
| 2286 | return sym != NULL |
| 2287 | && S_IS_DEFINED (sym) |
| 2288 | && ! S_IS_WEAK (sym) |
| 2289 | && S_GET_SEGMENT (sym) == sec; |
| 2290 | } |
| 2291 | |
| 2292 | int |
| 2293 | md_estimate_size_before_relax (fragS *fragp, asection *seg) |
| 2294 | { |
| 2295 | if (fragp->fr_subtype == 6 |
| 2296 | && ! has_known_symbol_location (fragp, seg)) |
| 2297 | fragp->fr_subtype = 7; |
| 2298 | else if (fragp->fr_subtype == 8 |
| 2299 | && ! has_known_symbol_location (fragp, seg)) |
| 2300 | fragp->fr_subtype = 9; |
| 2301 | else if (fragp->fr_subtype == 10 |
| 2302 | && ! has_known_symbol_location (fragp, seg)) |
| 2303 | fragp->fr_subtype = 12; |
| 2304 | |
| 2305 | if (fragp->fr_subtype == 13) |
| 2306 | return 3; |
| 2307 | |
| 2308 | if (fragp->fr_subtype >= sizeof (md_relax_table) / sizeof (md_relax_table[0])) |
| 2309 | abort (); |
| 2310 | |
| 2311 | return md_relax_table[fragp->fr_subtype].rlx_length; |
| 2312 | } |
| 2313 | |
| 2314 | long |
| 2315 | md_pcrel_from (fixS *fixp) |
| 2316 | { |
| 2317 | if (fixp->fx_addsy != (symbolS *) NULL |
| 2318 | && (!S_IS_DEFINED (fixp->fx_addsy) || S_IS_WEAK (fixp->fx_addsy))) |
| 2319 | /* The symbol is undefined or weak. Let the linker figure it out. */ |
| 2320 | return 0; |
| 2321 | |
| 2322 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 2323 | } |
| 2324 | |
| 2325 | void |
| 2326 | md_apply_fix (fixS * fixP, valueT * valP, segT seg) |
| 2327 | { |
| 2328 | char * fixpos = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 2329 | int size = 0; |
| 2330 | int value = (int) * valP; |
| 2331 | |
| 2332 | gas_assert (fixP->fx_r_type < BFD_RELOC_UNUSED); |
| 2333 | |
| 2334 | /* This should never happen. */ |
| 2335 | if (seg->flags & SEC_ALLOC) |
| 2336 | abort (); |
| 2337 | |
| 2338 | /* The value we are passed in *valuep includes the symbol values. |
| 2339 | If we are doing this relocation the code in write.c is going to |
| 2340 | call bfd_install_relocation, which is also going to use the symbol |
| 2341 | value. That means that if the reloc is fully resolved we want to |
| 2342 | use *valuep since bfd_install_relocation is not being used. |
| 2343 | |
| 2344 | However, if the reloc is not fully resolved we do not want to use |
| 2345 | *valuep, and must use fx_offset instead. However, if the reloc |
| 2346 | is PC relative, we do want to use *valuep since it includes the |
| 2347 | result of md_pcrel_from. */ |
| 2348 | if (fixP->fx_addsy != NULL && ! fixP->fx_pcrel) |
| 2349 | value = fixP->fx_offset; |
| 2350 | |
| 2351 | /* If the fix is relative to a symbol which is not defined, or not |
| 2352 | in the same segment as the fix, we cannot resolve it here. */ |
| 2353 | if (fixP->fx_addsy != NULL |
| 2354 | && (! S_IS_DEFINED (fixP->fx_addsy) |
| 2355 | || (S_GET_SEGMENT (fixP->fx_addsy) != seg))) |
| 2356 | { |
| 2357 | fixP->fx_done = 0; |
| 2358 | return; |
| 2359 | } |
| 2360 | |
| 2361 | switch (fixP->fx_r_type) |
| 2362 | { |
| 2363 | case BFD_RELOC_8: |
| 2364 | case BFD_RELOC_8_PCREL: |
| 2365 | size = 1; |
| 2366 | break; |
| 2367 | |
| 2368 | case BFD_RELOC_16: |
| 2369 | case BFD_RELOC_16_PCREL: |
| 2370 | size = 2; |
| 2371 | break; |
| 2372 | |
| 2373 | case BFD_RELOC_32: |
| 2374 | case BFD_RELOC_32_PCREL: |
| 2375 | size = 4; |
| 2376 | break; |
| 2377 | |
| 2378 | case BFD_RELOC_VTABLE_INHERIT: |
| 2379 | case BFD_RELOC_VTABLE_ENTRY: |
| 2380 | fixP->fx_done = 0; |
| 2381 | return; |
| 2382 | |
| 2383 | case BFD_RELOC_MN10300_ALIGN: |
| 2384 | fixP->fx_done = 1; |
| 2385 | return; |
| 2386 | |
| 2387 | case BFD_RELOC_NONE: |
| 2388 | default: |
| 2389 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2390 | _("Bad relocation fixup type (%d)"), fixP->fx_r_type); |
| 2391 | } |
| 2392 | |
| 2393 | md_number_to_chars (fixpos, value, size); |
| 2394 | |
| 2395 | /* If a symbol remains, pass the fixup, as a reloc, onto the linker. */ |
| 2396 | if (fixP->fx_addsy == NULL) |
| 2397 | fixP->fx_done = 1; |
| 2398 | } |
| 2399 | |
| 2400 | /* Return zero if the fixup in fixp should be left alone and not |
| 2401 | adjusted. */ |
| 2402 | |
| 2403 | bfd_boolean |
| 2404 | mn10300_fix_adjustable (struct fix *fixp) |
| 2405 | { |
| 2406 | if (fixp->fx_pcrel) |
| 2407 | { |
| 2408 | if (TC_FORCE_RELOCATION_LOCAL (fixp)) |
| 2409 | return FALSE; |
| 2410 | } |
| 2411 | /* Non-relative relocs can (and must) be adjusted if they do |
| 2412 | not meet the criteria below, or the generic criteria. */ |
| 2413 | else if (TC_FORCE_RELOCATION (fixp)) |
| 2414 | return FALSE; |
| 2415 | |
| 2416 | /* Do not adjust relocations involving symbols in code sections, |
| 2417 | because it breaks linker relaxations. This could be fixed in the |
| 2418 | linker, but this fix is simpler, and it pretty much only affects |
| 2419 | object size a little bit. */ |
| 2420 | if (S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_CODE) |
| 2421 | return FALSE; |
| 2422 | |
| 2423 | /* Likewise, do not adjust symbols that won't be merged, or debug |
| 2424 | symbols, because they too break relaxation. We do want to adjust |
| 2425 | other mergeable symbols, like .rodata, because code relaxations |
| 2426 | need section-relative symbols to properly relax them. */ |
| 2427 | if (! (S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_MERGE)) |
| 2428 | return FALSE; |
| 2429 | |
| 2430 | if (strncmp (S_GET_SEGMENT (fixp->fx_addsy)->name, ".debug", 6) == 0) |
| 2431 | return FALSE; |
| 2432 | |
| 2433 | return TRUE; |
| 2434 | } |
| 2435 | |
| 2436 | static void |
| 2437 | set_arch_mach (int mach) |
| 2438 | { |
| 2439 | if (!bfd_set_arch_mach (stdoutput, bfd_arch_mn10300, mach)) |
| 2440 | as_warn (_("could not set architecture and machine")); |
| 2441 | |
| 2442 | current_machine = mach; |
| 2443 | } |
| 2444 | |
| 2445 | static inline char * |
| 2446 | mn10300_end_of_match (char *cont, const char *what) |
| 2447 | { |
| 2448 | int len = strlen (what); |
| 2449 | |
| 2450 | if (strncmp (cont, what, strlen (what)) == 0 |
| 2451 | && ! is_part_of_name (cont[len])) |
| 2452 | return cont + len; |
| 2453 | |
| 2454 | return NULL; |
| 2455 | } |
| 2456 | |
| 2457 | int |
| 2458 | mn10300_parse_name (char const *name, |
| 2459 | expressionS *exprP, |
| 2460 | enum expr_mode mode, |
| 2461 | char *nextcharP) |
| 2462 | { |
| 2463 | char *next = input_line_pointer; |
| 2464 | char *next_end; |
| 2465 | int reloc_type; |
| 2466 | segT segment; |
| 2467 | |
| 2468 | exprP->X_op_symbol = NULL; |
| 2469 | |
| 2470 | if (strcmp (name, GLOBAL_OFFSET_TABLE_NAME) == 0) |
| 2471 | { |
| 2472 | if (! GOT_symbol) |
| 2473 | GOT_symbol = symbol_find_or_make (name); |
| 2474 | |
| 2475 | exprP->X_add_symbol = GOT_symbol; |
| 2476 | no_suffix: |
| 2477 | /* If we have an absolute symbol or a reg, |
| 2478 | then we know its value now. */ |
| 2479 | segment = S_GET_SEGMENT (exprP->X_add_symbol); |
| 2480 | if (mode != expr_defer && segment == absolute_section) |
| 2481 | { |
| 2482 | exprP->X_op = O_constant; |
| 2483 | exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol); |
| 2484 | exprP->X_add_symbol = NULL; |
| 2485 | } |
| 2486 | else if (mode != expr_defer && segment == reg_section) |
| 2487 | { |
| 2488 | exprP->X_op = O_register; |
| 2489 | exprP->X_add_number = S_GET_VALUE (exprP->X_add_symbol); |
| 2490 | exprP->X_add_symbol = NULL; |
| 2491 | } |
| 2492 | else |
| 2493 | { |
| 2494 | exprP->X_op = O_symbol; |
| 2495 | exprP->X_add_number = 0; |
| 2496 | } |
| 2497 | |
| 2498 | return 1; |
| 2499 | } |
| 2500 | |
| 2501 | exprP->X_add_symbol = symbol_find_or_make (name); |
| 2502 | |
| 2503 | if (*nextcharP != '@') |
| 2504 | goto no_suffix; |
| 2505 | else if ((next_end = mn10300_end_of_match (next + 1, "GOTOFF"))) |
| 2506 | reloc_type = BFD_RELOC_32_GOTOFF; |
| 2507 | else if ((next_end = mn10300_end_of_match (next + 1, "GOT"))) |
| 2508 | reloc_type = BFD_RELOC_MN10300_GOT32; |
| 2509 | else if ((next_end = mn10300_end_of_match (next + 1, "PLT"))) |
| 2510 | reloc_type = BFD_RELOC_32_PLT_PCREL; |
| 2511 | else if ((next_end = mn10300_end_of_match (next + 1, "tlsgd"))) |
| 2512 | reloc_type = BFD_RELOC_MN10300_TLS_GD; |
| 2513 | else if ((next_end = mn10300_end_of_match (next + 1, "tlsldm"))) |
| 2514 | reloc_type = BFD_RELOC_MN10300_TLS_LD; |
| 2515 | else if ((next_end = mn10300_end_of_match (next + 1, "dtpoff"))) |
| 2516 | reloc_type = BFD_RELOC_MN10300_TLS_LDO; |
| 2517 | else if ((next_end = mn10300_end_of_match (next + 1, "gotntpoff"))) |
| 2518 | reloc_type = BFD_RELOC_MN10300_TLS_GOTIE; |
| 2519 | else if ((next_end = mn10300_end_of_match (next + 1, "indntpoff"))) |
| 2520 | reloc_type = BFD_RELOC_MN10300_TLS_IE; |
| 2521 | else if ((next_end = mn10300_end_of_match (next + 1, "tpoff"))) |
| 2522 | reloc_type = BFD_RELOC_MN10300_TLS_LE; |
| 2523 | else |
| 2524 | goto no_suffix; |
| 2525 | |
| 2526 | *input_line_pointer = *nextcharP; |
| 2527 | input_line_pointer = next_end; |
| 2528 | *nextcharP = *input_line_pointer; |
| 2529 | *input_line_pointer = '\0'; |
| 2530 | |
| 2531 | exprP->X_op = O_PIC_reloc; |
| 2532 | exprP->X_add_number = 0; |
| 2533 | exprP->X_md = reloc_type; |
| 2534 | |
| 2535 | return 1; |
| 2536 | } |
| 2537 | |
| 2538 | /* The target specific pseudo-ops which we support. */ |
| 2539 | const pseudo_typeS md_pseudo_table[] = |
| 2540 | { |
| 2541 | { "am30", set_arch_mach, AM30 }, |
| 2542 | { "am33", set_arch_mach, AM33 }, |
| 2543 | { "am33_2", set_arch_mach, AM33_2 }, |
| 2544 | { "mn10300", set_arch_mach, MN103 }, |
| 2545 | {NULL, 0, 0} |
| 2546 | }; |
| 2547 | |
| 2548 | /* Returns FALSE if there is some mn10300 specific reason why the |
| 2549 | subtraction of two same-section symbols cannot be computed by |
| 2550 | the assembler. */ |
| 2551 | |
| 2552 | bfd_boolean |
| 2553 | mn10300_allow_local_subtract (expressionS * left, expressionS * right, segT section) |
| 2554 | { |
| 2555 | bfd_boolean result; |
| 2556 | fragS * left_frag; |
| 2557 | fragS * right_frag; |
| 2558 | fragS * frag; |
| 2559 | |
| 2560 | /* If we are not performing linker relaxation then we have nothing |
| 2561 | to worry about. */ |
| 2562 | if (linkrelax == 0) |
| 2563 | return TRUE; |
| 2564 | |
| 2565 | /* If the symbols are not in a code section then they are OK. */ |
| 2566 | if ((section->flags & SEC_CODE) == 0) |
| 2567 | return TRUE; |
| 2568 | |
| 2569 | /* Otherwise we have to scan the fragments between the two symbols. |
| 2570 | If any instructions are found then we have to assume that linker |
| 2571 | relaxation may change their size and so we must delay resolving |
| 2572 | the subtraction until the final link. */ |
| 2573 | left_frag = symbol_get_frag (left->X_add_symbol); |
| 2574 | right_frag = symbol_get_frag (right->X_add_symbol); |
| 2575 | |
| 2576 | if (left_frag == right_frag) |
| 2577 | return ! left_frag->tc_frag_data; |
| 2578 | |
| 2579 | result = TRUE; |
| 2580 | for (frag = left_frag; frag != NULL; frag = frag->fr_next) |
| 2581 | { |
| 2582 | if (frag->tc_frag_data) |
| 2583 | result = FALSE; |
| 2584 | if (frag == right_frag) |
| 2585 | break; |
| 2586 | } |
| 2587 | |
| 2588 | if (frag == NULL) |
| 2589 | for (frag = right_frag; frag != NULL; frag = frag->fr_next) |
| 2590 | { |
| 2591 | if (frag->tc_frag_data) |
| 2592 | result = FALSE; |
| 2593 | if (frag == left_frag) |
| 2594 | break; |
| 2595 | } |
| 2596 | |
| 2597 | if (frag == NULL) |
| 2598 | /* The two symbols are on disjoint fragment chains |
| 2599 | - we cannot possibly compute their difference. */ |
| 2600 | return FALSE; |
| 2601 | |
| 2602 | return result; |
| 2603 | } |
| 2604 | |
| 2605 | /* When relaxing, we need to output a reloc for any .align directive |
| 2606 | that requests alignment to a two byte boundary or larger. */ |
| 2607 | |
| 2608 | void |
| 2609 | mn10300_handle_align (fragS *frag) |
| 2610 | { |
| 2611 | if (linkrelax |
| 2612 | && (frag->fr_type == rs_align |
| 2613 | || frag->fr_type == rs_align_code) |
| 2614 | && frag->fr_address + frag->fr_fix > 0 |
| 2615 | && frag->fr_offset > 1 |
| 2616 | && now_seg != bss_section |
| 2617 | /* Do not create relocs for the merging sections - such |
| 2618 | relocs will prevent the contents from being merged. */ |
| 2619 | && (bfd_section_flags (now_seg) & SEC_MERGE) == 0) |
| 2620 | /* Create a new fixup to record the alignment request. The symbol is |
| 2621 | irrelevant but must be present so we use the absolute section symbol. |
| 2622 | The offset from the symbol is used to record the power-of-two alignment |
| 2623 | value. The size is set to 0 because the frag may already be aligned, |
| 2624 | thus causing cvt_frag_to_fill to reduce the size of the frag to zero. */ |
| 2625 | fix_new (frag, frag->fr_fix, 0, & abs_symbol, frag->fr_offset, FALSE, |
| 2626 | BFD_RELOC_MN10300_ALIGN); |
| 2627 | } |
| 2628 | |
| 2629 | bfd_boolean |
| 2630 | mn10300_force_relocation (struct fix * fixp) |
| 2631 | { |
| 2632 | if (linkrelax |
| 2633 | && (fixp->fx_pcrel |
| 2634 | || fixp->fx_r_type == BFD_RELOC_MN10300_ALIGN)) |
| 2635 | return TRUE; |
| 2636 | |
| 2637 | return generic_force_reloc (fixp); |
| 2638 | } |