| 1 | /* tc-fr30.c -- Assembler for the Fujitsu FR30. |
| 2 | Copyright (C) 1998, 1999 Free Software Foundation. |
| 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 2, 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, 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <ctype.h> |
| 23 | #include "as.h" |
| 24 | #include "subsegs.h" |
| 25 | #include "symcat.h" |
| 26 | #include "opcodes/fr30-desc.h" |
| 27 | #include "opcodes/fr30-opc.h" |
| 28 | #include "cgen.h" |
| 29 | |
| 30 | /* Structure to hold all of the different components describing |
| 31 | an individual instruction. */ |
| 32 | typedef struct |
| 33 | { |
| 34 | const CGEN_INSN * insn; |
| 35 | const CGEN_INSN * orig_insn; |
| 36 | CGEN_FIELDS fields; |
| 37 | #if CGEN_INT_INSN_P |
| 38 | CGEN_INSN_INT buffer [1]; |
| 39 | #define INSN_VALUE(buf) (*(buf)) |
| 40 | #else |
| 41 | unsigned char buffer [CGEN_MAX_INSN_SIZE]; |
| 42 | #define INSN_VALUE(buf) (buf) |
| 43 | #endif |
| 44 | char * addr; |
| 45 | fragS * frag; |
| 46 | int num_fixups; |
| 47 | fixS * fixups [GAS_CGEN_MAX_FIXUPS]; |
| 48 | int indices [MAX_OPERAND_INSTANCES]; |
| 49 | } |
| 50 | fr30_insn; |
| 51 | |
| 52 | const char comment_chars[] = ";"; |
| 53 | const char line_comment_chars[] = "#"; |
| 54 | const char line_separator_chars[] = "|"; |
| 55 | const char EXP_CHARS[] = "eE"; |
| 56 | const char FLT_CHARS[] = "dD"; |
| 57 | \f |
| 58 | #define FR30_SHORTOPTS "" |
| 59 | const char * md_shortopts = FR30_SHORTOPTS; |
| 60 | |
| 61 | struct option md_longopts[] = |
| 62 | { |
| 63 | {NULL, no_argument, NULL, 0} |
| 64 | }; |
| 65 | size_t md_longopts_size = sizeof (md_longopts); |
| 66 | |
| 67 | int |
| 68 | md_parse_option (c, arg) |
| 69 | int c; |
| 70 | char * arg; |
| 71 | { |
| 72 | switch (c) |
| 73 | { |
| 74 | default: |
| 75 | return 0; |
| 76 | } |
| 77 | return 1; |
| 78 | } |
| 79 | |
| 80 | void |
| 81 | md_show_usage (stream) |
| 82 | FILE * stream; |
| 83 | { |
| 84 | fprintf (stream, _(" FR30 specific command line options:\n")); |
| 85 | } |
| 86 | |
| 87 | /* The target specific pseudo-ops which we support. */ |
| 88 | const pseudo_typeS md_pseudo_table[] = |
| 89 | { |
| 90 | { "word", cons, 4 }, |
| 91 | { NULL, NULL, 0 } |
| 92 | }; |
| 93 | |
| 94 | \f |
| 95 | void |
| 96 | md_begin () |
| 97 | { |
| 98 | flagword applicable; |
| 99 | segT seg; |
| 100 | subsegT subseg; |
| 101 | |
| 102 | /* Initialize the `cgen' interface. */ |
| 103 | |
| 104 | /* Set the machine number and endian. */ |
| 105 | gas_cgen_cpu_desc = fr30_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, 0, |
| 106 | CGEN_CPU_OPEN_ENDIAN, |
| 107 | CGEN_ENDIAN_BIG, |
| 108 | CGEN_CPU_OPEN_END); |
| 109 | fr30_cgen_init_asm (gas_cgen_cpu_desc); |
| 110 | |
| 111 | /* This is a callback from cgen to gas to parse operands. */ |
| 112 | cgen_set_parse_operand_fn (gas_cgen_cpu_desc, gas_cgen_parse_operand); |
| 113 | } |
| 114 | |
| 115 | void |
| 116 | md_assemble (str) |
| 117 | char * str; |
| 118 | { |
| 119 | static int last_insn_had_delay_slot = 0; |
| 120 | fr30_insn insn; |
| 121 | char * errmsg; |
| 122 | char * str2 = NULL; |
| 123 | |
| 124 | /* Initialize GAS's cgen interface for a new instruction. */ |
| 125 | gas_cgen_init_parse (); |
| 126 | |
| 127 | insn.insn = fr30_cgen_assemble_insn |
| 128 | (gas_cgen_cpu_desc, str, & insn.fields, insn.buffer, & errmsg); |
| 129 | |
| 130 | if (!insn.insn) |
| 131 | { |
| 132 | as_bad (errmsg); |
| 133 | return; |
| 134 | } |
| 135 | |
| 136 | /* Doesn't really matter what we pass for RELAX_P here. */ |
| 137 | gas_cgen_finish_insn (insn.insn, insn.buffer, |
| 138 | CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL); |
| 139 | |
| 140 | /* Warn about invalid insns in delay slots. */ |
| 141 | if (last_insn_had_delay_slot |
| 142 | && CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_NOT_IN_DELAY_SLOT)) |
| 143 | as_warn (_("Instruction %s not allowed in a delay slot."), |
| 144 | CGEN_INSN_NAME (insn.insn)); |
| 145 | |
| 146 | last_insn_had_delay_slot |
| 147 | = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT); |
| 148 | } |
| 149 | |
| 150 | /* The syntax in the manual says constants begin with '#'. |
| 151 | We just ignore it. */ |
| 152 | |
| 153 | void |
| 154 | md_operand (expressionP) |
| 155 | expressionS * expressionP; |
| 156 | { |
| 157 | if (* input_line_pointer == '#') |
| 158 | { |
| 159 | input_line_pointer ++; |
| 160 | expression (expressionP); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | valueT |
| 165 | md_section_align (segment, size) |
| 166 | segT segment; |
| 167 | valueT size; |
| 168 | { |
| 169 | int align = bfd_get_section_alignment (stdoutput, segment); |
| 170 | return ((size + (1 << align) - 1) & (-1 << align)); |
| 171 | } |
| 172 | |
| 173 | symbolS * |
| 174 | md_undefined_symbol (name) |
| 175 | char * name; |
| 176 | { |
| 177 | return 0; |
| 178 | } |
| 179 | \f |
| 180 | /* Interface to relax_segment. */ |
| 181 | |
| 182 | /* FIXME: Build table by hand, get it working, then machine generate. */ |
| 183 | |
| 184 | const relax_typeS md_relax_table[] = |
| 185 | { |
| 186 | /* The fields are: |
| 187 | 1) most positive reach of this state, |
| 188 | 2) most negative reach of this state, |
| 189 | 3) how many bytes this mode will add to the size of the current frag |
| 190 | 4) which index into the table to try if we can't fit into this one. */ |
| 191 | |
| 192 | /* The first entry must be unused because an `rlx_more' value of zero ends |
| 193 | each list. */ |
| 194 | {1, 1, 0, 0}, |
| 195 | |
| 196 | /* The displacement used by GAS is from the end of the 2 byte insn, |
| 197 | so we subtract 2 from the following. */ |
| 198 | /* 16 bit insn, 8 bit disp -> 10 bit range. |
| 199 | This doesn't handle a branch in the right slot at the border: |
| 200 | the "& -4" isn't taken into account. It's not important enough to |
| 201 | complicate things over it, so we subtract an extra 2 (or + 2 in -ve |
| 202 | case). */ |
| 203 | {511 - 2 - 2, -512 - 2 + 2, 0, 2 }, |
| 204 | /* 32 bit insn, 24 bit disp -> 26 bit range. */ |
| 205 | {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 }, |
| 206 | /* Same thing, but with leading nop for alignment. */ |
| 207 | {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 } |
| 208 | }; |
| 209 | |
| 210 | long |
| 211 | fr30_relax_frag (fragP, stretch) |
| 212 | fragS * fragP; |
| 213 | long stretch; |
| 214 | { |
| 215 | /* Address of branch insn. */ |
| 216 | long address = fragP->fr_address + fragP->fr_fix - 2; |
| 217 | long growth = 0; |
| 218 | |
| 219 | /* Keep 32 bit insns aligned on 32 bit boundaries. */ |
| 220 | if (fragP->fr_subtype == 2) |
| 221 | { |
| 222 | if ((address & 3) != 0) |
| 223 | { |
| 224 | fragP->fr_subtype = 3; |
| 225 | growth = 2; |
| 226 | } |
| 227 | } |
| 228 | else if (fragP->fr_subtype == 3) |
| 229 | { |
| 230 | if ((address & 3) == 0) |
| 231 | { |
| 232 | fragP->fr_subtype = 2; |
| 233 | growth = -2; |
| 234 | } |
| 235 | } |
| 236 | else |
| 237 | { |
| 238 | growth = relax_frag (fragP, stretch); |
| 239 | |
| 240 | /* Long jump on odd halfword boundary? */ |
| 241 | if (fragP->fr_subtype == 2 && (address & 3) != 0) |
| 242 | { |
| 243 | fragP->fr_subtype = 3; |
| 244 | growth += 2; |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | return growth; |
| 249 | } |
| 250 | |
| 251 | /* Return an initial guess of the length by which a fragment must grow to |
| 252 | hold a branch to reach its destination. |
| 253 | Also updates fr_type/fr_subtype as necessary. |
| 254 | |
| 255 | Called just before doing relaxation. |
| 256 | Any symbol that is now undefined will not become defined. |
| 257 | The guess for fr_var is ACTUALLY the growth beyond fr_fix. |
| 258 | Whatever we do to grow fr_fix or fr_var contributes to our returned value. |
| 259 | Although it may not be explicit in the frag, pretend fr_var starts with a |
| 260 | 0 value. */ |
| 261 | |
| 262 | int |
| 263 | md_estimate_size_before_relax (fragP, segment) |
| 264 | fragS * fragP; |
| 265 | segT segment; |
| 266 | { |
| 267 | int old_fr_fix = fragP->fr_fix; |
| 268 | |
| 269 | /* The only thing we have to handle here are symbols outside of the |
| 270 | current segment. They may be undefined or in a different segment in |
| 271 | which case linker scripts may place them anywhere. |
| 272 | However, we can't finish the fragment here and emit the reloc as insn |
| 273 | alignment requirements may move the insn about. */ |
| 274 | |
| 275 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment) |
| 276 | { |
| 277 | /* The symbol is undefined in this segment. |
| 278 | Change the relaxation subtype to the max allowable and leave |
| 279 | all further handling to md_convert_frag. */ |
| 280 | fragP->fr_subtype = 2; |
| 281 | |
| 282 | #if 0 /* Can't use this, but leave in for illustration. */ |
| 283 | /* Change 16 bit insn to 32 bit insn. */ |
| 284 | fragP->fr_opcode[0] |= 0x80; |
| 285 | |
| 286 | /* Increase known (fixed) size of fragment. */ |
| 287 | fragP->fr_fix += 2; |
| 288 | |
| 289 | /* Create a relocation for it. */ |
| 290 | fix_new (fragP, old_fr_fix, 4, |
| 291 | fragP->fr_symbol, |
| 292 | fragP->fr_offset, 1 /* pcrel */, |
| 293 | /* FIXME: Can't use a real BFD reloc here. |
| 294 | gas_cgen_md_apply_fix3 can't handle it. */ |
| 295 | BFD_RELOC_FR30_26_PCREL); |
| 296 | |
| 297 | /* Mark this fragment as finished. */ |
| 298 | frag_wane (fragP); |
| 299 | #else |
| 300 | { |
| 301 | const CGEN_INSN * insn; |
| 302 | int i; |
| 303 | |
| 304 | /* Update the recorded insn. |
| 305 | Fortunately we don't have to look very far. |
| 306 | FIXME: Change this to record in the instruction the next higher |
| 307 | relaxable insn to use. */ |
| 308 | for (i = 0, insn = fragP->fr_cgen.insn; i < 4; i++, insn++) |
| 309 | { |
| 310 | if ((strcmp (CGEN_INSN_MNEMONIC (insn), |
| 311 | CGEN_INSN_MNEMONIC (fragP->fr_cgen.insn)) |
| 312 | == 0) |
| 313 | && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX)) |
| 314 | break; |
| 315 | } |
| 316 | if (i == 4) |
| 317 | abort (); |
| 318 | |
| 319 | fragP->fr_cgen.insn = insn; |
| 320 | return 2; |
| 321 | } |
| 322 | #endif |
| 323 | } |
| 324 | |
| 325 | return (fragP->fr_var + fragP->fr_fix - old_fr_fix); |
| 326 | } |
| 327 | |
| 328 | /* *fragP has been relaxed to its final size, and now needs to have |
| 329 | the bytes inside it modified to conform to the new size. |
| 330 | |
| 331 | Called after relaxation is finished. |
| 332 | fragP->fr_type == rs_machine_dependent. |
| 333 | fragP->fr_subtype is the subtype of what the address relaxed to. */ |
| 334 | |
| 335 | void |
| 336 | md_convert_frag (abfd, sec, fragP) |
| 337 | bfd * abfd; |
| 338 | segT sec; |
| 339 | fragS * fragP; |
| 340 | { |
| 341 | #if 0 |
| 342 | char * opcode; |
| 343 | char * displacement; |
| 344 | int target_address; |
| 345 | int opcode_address; |
| 346 | int extension; |
| 347 | int addend; |
| 348 | |
| 349 | opcode = fragP->fr_opcode; |
| 350 | |
| 351 | /* Address opcode resides at in file space. */ |
| 352 | opcode_address = fragP->fr_address + fragP->fr_fix - 2; |
| 353 | |
| 354 | switch (fragP->fr_subtype) |
| 355 | { |
| 356 | case 1 : |
| 357 | extension = 0; |
| 358 | displacement = & opcode[1]; |
| 359 | break; |
| 360 | case 2 : |
| 361 | opcode[0] |= 0x80; |
| 362 | extension = 2; |
| 363 | displacement = & opcode[1]; |
| 364 | break; |
| 365 | case 3 : |
| 366 | opcode[2] = opcode[0] | 0x80; |
| 367 | md_number_to_chars (opcode, PAR_NOP_INSN, 2); |
| 368 | opcode_address += 2; |
| 369 | extension = 4; |
| 370 | displacement = & opcode[3]; |
| 371 | break; |
| 372 | default : |
| 373 | abort (); |
| 374 | } |
| 375 | |
| 376 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec) |
| 377 | { |
| 378 | /* symbol must be resolved by linker */ |
| 379 | if (fragP->fr_offset & 3) |
| 380 | as_warn (_("Addend to unresolved symbol not on word boundary.")); |
| 381 | addend = fragP->fr_offset >> 2; |
| 382 | } |
| 383 | else |
| 384 | { |
| 385 | /* Address we want to reach in file space. */ |
| 386 | target_address = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset; |
| 387 | target_address += fragP->fr_symbol->sy_frag->fr_address; |
| 388 | addend = (target_address - (opcode_address & -4)) >> 2; |
| 389 | } |
| 390 | |
| 391 | /* Create a relocation for symbols that must be resolved by the linker. |
| 392 | Otherwise output the completed insn. */ |
| 393 | |
| 394 | if (S_GET_SEGMENT (fragP->fr_symbol) != sec) |
| 395 | { |
| 396 | assert (fragP->fr_subtype != 1); |
| 397 | assert (fragP->fr_cgen.insn != 0); |
| 398 | gas_cgen_record_fixup (fragP, |
| 399 | /* Offset of branch insn in frag. */ |
| 400 | fragP->fr_fix + extension - 4, |
| 401 | fragP->fr_cgen.insn, |
| 402 | 4 /*length*/, |
| 403 | /* FIXME: quick hack */ |
| 404 | #if 0 |
| 405 | CGEN_OPERAND_ENTRY (fragP->fr_cgen.opindex), |
| 406 | #else |
| 407 | CGEN_OPERAND_ENTRY (FR30_OPERAND_DISP24), |
| 408 | #endif |
| 409 | fragP->fr_cgen.opinfo, |
| 410 | fragP->fr_symbol, fragP->fr_offset); |
| 411 | } |
| 412 | |
| 413 | #define SIZE_FROM_RELAX_STATE(n) ((n) == 1 ? 1 : 3) |
| 414 | |
| 415 | md_number_to_chars (displacement, (valueT) addend, |
| 416 | SIZE_FROM_RELAX_STATE (fragP->fr_subtype)); |
| 417 | |
| 418 | fragP->fr_fix += extension; |
| 419 | #endif |
| 420 | } |
| 421 | \f |
| 422 | /* Functions concerning relocs. */ |
| 423 | |
| 424 | /* The location from which a PC relative jump should be calculated, |
| 425 | given a PC relative reloc. */ |
| 426 | |
| 427 | long |
| 428 | md_pcrel_from_section (fixP, sec) |
| 429 | fixS * fixP; |
| 430 | segT sec; |
| 431 | { |
| 432 | if (fixP->fx_addsy != (symbolS *) NULL |
| 433 | && (! S_IS_DEFINED (fixP->fx_addsy) |
| 434 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) |
| 435 | { |
| 436 | /* The symbol is undefined (or is defined but not in this section). |
| 437 | Let the linker figure it out. */ |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | return (fixP->fx_frag->fr_address + fixP->fx_where) & ~1; |
| 442 | } |
| 443 | |
| 444 | /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP. |
| 445 | Returns BFD_RELOC_NONE if no reloc type can be found. |
| 446 | *FIXP may be modified if desired. */ |
| 447 | |
| 448 | bfd_reloc_code_real_type |
| 449 | md_cgen_lookup_reloc (insn, operand, fixP) |
| 450 | const CGEN_INSN * insn; |
| 451 | const CGEN_OPERAND * operand; |
| 452 | fixS * fixP; |
| 453 | { |
| 454 | switch (operand->type) |
| 455 | { |
| 456 | case FR30_OPERAND_LABEL9: fixP->fx_pcrel = 1; return BFD_RELOC_FR30_9_PCREL; |
| 457 | case FR30_OPERAND_LABEL12: fixP->fx_pcrel = 1; return BFD_RELOC_FR30_12_PCREL; |
| 458 | case FR30_OPERAND_DISP10: return BFD_RELOC_FR30_10_IN_8; |
| 459 | case FR30_OPERAND_DISP9: return BFD_RELOC_FR30_9_IN_8; |
| 460 | case FR30_OPERAND_DISP8: return BFD_RELOC_FR30_8_IN_8; |
| 461 | case FR30_OPERAND_UDISP6: return BFD_RELOC_FR30_6_IN_4; |
| 462 | case FR30_OPERAND_I8: return BFD_RELOC_8; |
| 463 | case FR30_OPERAND_I32: return BFD_RELOC_FR30_48; |
| 464 | case FR30_OPERAND_I20: return BFD_RELOC_FR30_20; |
| 465 | default : /* avoid -Wall warning */ |
| 466 | break; |
| 467 | } |
| 468 | |
| 469 | return BFD_RELOC_NONE; |
| 470 | } |
| 471 | |
| 472 | /* See whether we need to force a relocation into the output file. |
| 473 | This is used to force out switch and PC relative relocations when |
| 474 | relaxing. */ |
| 475 | |
| 476 | int |
| 477 | fr30_force_relocation (fix) |
| 478 | fixS * fix; |
| 479 | { |
| 480 | if ( fix->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 481 | || fix->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 482 | return 1; |
| 483 | |
| 484 | return 0; |
| 485 | } |
| 486 | \f |
| 487 | /* Write a value out to the object file, using the appropriate endianness. */ |
| 488 | |
| 489 | void |
| 490 | md_number_to_chars (buf, val, n) |
| 491 | char * buf; |
| 492 | valueT val; |
| 493 | int n; |
| 494 | { |
| 495 | number_to_chars_bigendian (buf, val, n); |
| 496 | } |
| 497 | |
| 498 | /* Turn a string in input_line_pointer into a floating point constant of type |
| 499 | type, and store the appropriate bytes in *litP. The number of LITTLENUMS |
| 500 | emitted is stored in *sizeP . An error message is returned, or NULL on OK. |
| 501 | */ |
| 502 | |
| 503 | /* Equal to MAX_PRECISION in atof-ieee.c */ |
| 504 | #define MAX_LITTLENUMS 6 |
| 505 | |
| 506 | char * |
| 507 | md_atof (type, litP, sizeP) |
| 508 | char type; |
| 509 | char * litP; |
| 510 | int * sizeP; |
| 511 | { |
| 512 | int i; |
| 513 | int prec; |
| 514 | LITTLENUM_TYPE words [MAX_LITTLENUMS]; |
| 515 | char * t; |
| 516 | char * atof_ieee (); |
| 517 | |
| 518 | switch (type) |
| 519 | { |
| 520 | case 'f': |
| 521 | case 'F': |
| 522 | case 's': |
| 523 | case 'S': |
| 524 | prec = 2; |
| 525 | break; |
| 526 | |
| 527 | case 'd': |
| 528 | case 'D': |
| 529 | case 'r': |
| 530 | case 'R': |
| 531 | prec = 4; |
| 532 | break; |
| 533 | |
| 534 | /* FIXME: Some targets allow other format chars for bigger sizes here. */ |
| 535 | |
| 536 | default: |
| 537 | * sizeP = 0; |
| 538 | return _("Bad call to md_atof()"); |
| 539 | } |
| 540 | |
| 541 | t = atof_ieee (input_line_pointer, type, words); |
| 542 | if (t) |
| 543 | input_line_pointer = t; |
| 544 | * sizeP = prec * sizeof (LITTLENUM_TYPE); |
| 545 | |
| 546 | for (i = 0; i < prec; i++) |
| 547 | { |
| 548 | md_number_to_chars (litP, (valueT) words[i], |
| 549 | sizeof (LITTLENUM_TYPE)); |
| 550 | litP += sizeof (LITTLENUM_TYPE); |
| 551 | } |
| 552 | |
| 553 | return 0; |
| 554 | } |
| 555 | |
| 556 | /* Worker function for fr30_is_colon_insn(). */ |
| 557 | static char |
| 558 | restore_colon (advance_i_l_p_by) |
| 559 | int advance_i_l_p_by; |
| 560 | { |
| 561 | char c; |
| 562 | |
| 563 | /* Restore the colon, and advance input_line_pointer to |
| 564 | the end of the new symbol. */ |
| 565 | * input_line_pointer = ':'; |
| 566 | input_line_pointer += advance_i_l_p_by; |
| 567 | c = * input_line_pointer; |
| 568 | * input_line_pointer = 0; |
| 569 | |
| 570 | return c; |
| 571 | } |
| 572 | |
| 573 | /* Determines if the symbol starting at START and ending in |
| 574 | a colon that was at the location pointed to by INPUT_LINE_POINTER |
| 575 | (but which has now been replaced bu a NUL) is in fact an |
| 576 | LDI:8, LDI:20, LDI:32, CALL:D. JMP:D, RET:D or Bcc:D instruction. |
| 577 | If it is, then it restores the colon, advances INPUT_LINE_POINTER |
| 578 | to the real end of the instruction/symbol, and returns the character |
| 579 | that really terminated the symbol. Otherwise it returns 0. */ |
| 580 | char |
| 581 | fr30_is_colon_insn (start) |
| 582 | char * start; |
| 583 | { |
| 584 | char * i_l_p = input_line_pointer; |
| 585 | |
| 586 | /* Check to see if the symbol parsed so far is 'ldi' */ |
| 587 | if ( (start[0] != 'l' && start[0] != 'L') |
| 588 | || (start[1] != 'd' && start[1] != 'D') |
| 589 | || (start[2] != 'i' && start[2] != 'I') |
| 590 | || start[3] != 0) |
| 591 | { |
| 592 | /* Nope - check to see a 'd' follows the colon. */ |
| 593 | if ( (i_l_p[1] == 'd' || i_l_p[1] == 'D') |
| 594 | && (i_l_p[2] == ' ' || i_l_p[2] == '\t' || i_l_p[2] == '\n')) |
| 595 | { |
| 596 | /* Yup - it might be delay slot instruction. */ |
| 597 | int i; |
| 598 | static char * delay_insns [] = |
| 599 | { |
| 600 | "call", "jmp", "ret", "bra", "bno", |
| 601 | "beq", "bne", "bc", "bnc", "bn", |
| 602 | "bp", "bv", "bnv", "blt", "bge", |
| 603 | "ble", "bgt", "bls", "bhi" |
| 604 | }; |
| 605 | |
| 606 | for (i = sizeof (delay_insns) / sizeof (delay_insns[0]); i--;) |
| 607 | { |
| 608 | char * insn = delay_insns[i]; |
| 609 | int len = strlen (insn); |
| 610 | |
| 611 | if (start [len] != 0) |
| 612 | continue; |
| 613 | |
| 614 | while (len --) |
| 615 | if (tolower (start [len]) != insn [len]) |
| 616 | break; |
| 617 | |
| 618 | if (len == -1) |
| 619 | return restore_colon (1); |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | /* Nope - it is a normal label. */ |
| 624 | return 0; |
| 625 | } |
| 626 | |
| 627 | /* Check to see if the text following the colon is '8' */ |
| 628 | if (i_l_p[1] == '8' && (i_l_p[2] == ' ' || i_l_p[2] == '\t')) |
| 629 | return restore_colon (2); |
| 630 | |
| 631 | /* Check to see if the text following the colon is '20' */ |
| 632 | else if (i_l_p[1] == '2' && i_l_p[2] =='0' && (i_l_p[3] == ' ' || i_l_p[3] == '\t')) |
| 633 | return restore_colon (3); |
| 634 | |
| 635 | /* Check to see if the text following the colon is '32' */ |
| 636 | else if (i_l_p[1] == '3' && i_l_p[2] =='2' && (i_l_p[3] == ' ' || i_l_p[3] == '\t')) |
| 637 | return restore_colon (3); |
| 638 | |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | boolean |
| 643 | fr30_fix_adjustable (fixP) |
| 644 | fixS * fixP; |
| 645 | { |
| 646 | if (fixP->fx_addsy == NULL) |
| 647 | return 1; |
| 648 | |
| 649 | #if 0 |
| 650 | /* Prevent all adjustments to global symbols. */ |
| 651 | if (S_IS_EXTERN (fixP->fx_addsy)) |
| 652 | return 0; |
| 653 | |
| 654 | if (S_IS_WEAK (fixP->fx_addsy)) |
| 655 | return 0; |
| 656 | #endif |
| 657 | |
| 658 | /* We need the symbol name for the VTABLE entries */ |
| 659 | if ( fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT |
| 660 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) |
| 661 | return 0; |
| 662 | |
| 663 | return 1; |
| 664 | } |