| 1 | /* tc-rl78.c -- Assembler for the Renesas RL78 |
| 2 | Copyright (C) 2011-2015 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 the Free |
| 18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 19 | 02110-1301, USA. */ |
| 20 | |
| 21 | #include "as.h" |
| 22 | #include "struc-symbol.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "dwarf2dbg.h" |
| 25 | #include "libbfd.h" |
| 26 | #include "elf/common.h" |
| 27 | #include "elf/rl78.h" |
| 28 | #include "rl78-defs.h" |
| 29 | #include "filenames.h" |
| 30 | #include "listing.h" |
| 31 | #include "sb.h" |
| 32 | #include "macro.h" |
| 33 | |
| 34 | const char comment_chars[] = ";"; |
| 35 | /* Note that input_file.c hand checks for '#' at the beginning of the |
| 36 | first line of the input file. This is because the compiler outputs |
| 37 | #NO_APP at the beginning of its output. */ |
| 38 | const char line_comment_chars[] = "#"; |
| 39 | /* Use something that isn't going to be needed by any expressions or |
| 40 | other syntax. */ |
| 41 | const char line_separator_chars[] = "@"; |
| 42 | |
| 43 | const char EXP_CHARS[] = "eE"; |
| 44 | const char FLT_CHARS[] = "dD"; |
| 45 | |
| 46 | /* ELF flags to set in the output file header. */ |
| 47 | static int elf_flags = 0; |
| 48 | |
| 49 | /*------------------------------------------------------------------*/ |
| 50 | |
| 51 | char * rl78_lex_start; |
| 52 | char * rl78_lex_end; |
| 53 | |
| 54 | typedef struct rl78_bytesT |
| 55 | { |
| 56 | char prefix[1]; |
| 57 | int n_prefix; |
| 58 | char base[4]; |
| 59 | int n_base; |
| 60 | char ops[8]; |
| 61 | int n_ops; |
| 62 | struct |
| 63 | { |
| 64 | expressionS exp; |
| 65 | char offset; |
| 66 | char nbits; |
| 67 | char type; /* RL78REL_*. */ |
| 68 | int reloc; |
| 69 | fixS * fixP; |
| 70 | } fixups[2]; |
| 71 | int n_fixups; |
| 72 | struct |
| 73 | { |
| 74 | char type; |
| 75 | char field_pos; |
| 76 | char val_ofs; |
| 77 | } relax[2]; |
| 78 | int n_relax; |
| 79 | int link_relax; |
| 80 | fixS *link_relax_fixP; |
| 81 | char times_grown; |
| 82 | char times_shrank; |
| 83 | } rl78_bytesT; |
| 84 | |
| 85 | static rl78_bytesT rl78_bytes; |
| 86 | |
| 87 | void |
| 88 | rl78_relax (int type, int pos) |
| 89 | { |
| 90 | rl78_bytes.relax[rl78_bytes.n_relax].type = type; |
| 91 | rl78_bytes.relax[rl78_bytes.n_relax].field_pos = pos; |
| 92 | rl78_bytes.relax[rl78_bytes.n_relax].val_ofs = rl78_bytes.n_base + rl78_bytes.n_ops; |
| 93 | rl78_bytes.n_relax ++; |
| 94 | } |
| 95 | |
| 96 | void |
| 97 | rl78_linkrelax_addr16 (void) |
| 98 | { |
| 99 | rl78_bytes.link_relax |= RL78_RELAXA_ADDR16; |
| 100 | } |
| 101 | |
| 102 | void |
| 103 | rl78_linkrelax_branch (void) |
| 104 | { |
| 105 | rl78_bytes.link_relax |= RL78_RELAXA_BRA; |
| 106 | } |
| 107 | |
| 108 | static void |
| 109 | rl78_fixup (expressionS exp, int offsetbits, int nbits, int type) |
| 110 | { |
| 111 | rl78_bytes.fixups[rl78_bytes.n_fixups].exp = exp; |
| 112 | rl78_bytes.fixups[rl78_bytes.n_fixups].offset = offsetbits; |
| 113 | rl78_bytes.fixups[rl78_bytes.n_fixups].nbits = nbits; |
| 114 | rl78_bytes.fixups[rl78_bytes.n_fixups].type = type; |
| 115 | rl78_bytes.fixups[rl78_bytes.n_fixups].reloc = exp.X_md; |
| 116 | rl78_bytes.n_fixups ++; |
| 117 | } |
| 118 | |
| 119 | #define rl78_field_fixup(exp, offset, nbits, type) \ |
| 120 | rl78_fixup (exp, offset + 8 * rl78_bytes.n_prefix), nbits, type) |
| 121 | |
| 122 | #define rl78_op_fixup(exp, offset, nbits, type) \ |
| 123 | rl78_fixup (exp, offset + 8 * (rl78_bytes.n_prefix + rl78_bytes.n_base), nbits, type) |
| 124 | |
| 125 | void |
| 126 | rl78_prefix (int p) |
| 127 | { |
| 128 | rl78_bytes.prefix[0] = p; |
| 129 | rl78_bytes.n_prefix = 1; |
| 130 | } |
| 131 | |
| 132 | int |
| 133 | rl78_has_prefix () |
| 134 | { |
| 135 | return rl78_bytes.n_prefix; |
| 136 | } |
| 137 | |
| 138 | void |
| 139 | rl78_base1 (int b1) |
| 140 | { |
| 141 | rl78_bytes.base[0] = b1; |
| 142 | rl78_bytes.n_base = 1; |
| 143 | } |
| 144 | |
| 145 | void |
| 146 | rl78_base2 (int b1, int b2) |
| 147 | { |
| 148 | rl78_bytes.base[0] = b1; |
| 149 | rl78_bytes.base[1] = b2; |
| 150 | rl78_bytes.n_base = 2; |
| 151 | } |
| 152 | |
| 153 | void |
| 154 | rl78_base3 (int b1, int b2, int b3) |
| 155 | { |
| 156 | rl78_bytes.base[0] = b1; |
| 157 | rl78_bytes.base[1] = b2; |
| 158 | rl78_bytes.base[2] = b3; |
| 159 | rl78_bytes.n_base = 3; |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | rl78_base4 (int b1, int b2, int b3, int b4) |
| 164 | { |
| 165 | rl78_bytes.base[0] = b1; |
| 166 | rl78_bytes.base[1] = b2; |
| 167 | rl78_bytes.base[2] = b3; |
| 168 | rl78_bytes.base[3] = b4; |
| 169 | rl78_bytes.n_base = 4; |
| 170 | } |
| 171 | |
| 172 | #define F_PRECISION 2 |
| 173 | |
| 174 | void |
| 175 | rl78_op (expressionS exp, int nbytes, int type) |
| 176 | { |
| 177 | int v = 0; |
| 178 | |
| 179 | if ((exp.X_op == O_constant || exp.X_op == O_big) |
| 180 | && type != RL78REL_PCREL) |
| 181 | { |
| 182 | if (exp.X_op == O_big && exp.X_add_number <= 0) |
| 183 | { |
| 184 | LITTLENUM_TYPE w[2]; |
| 185 | char * ip = rl78_bytes.ops + rl78_bytes.n_ops; |
| 186 | |
| 187 | gen_to_words (w, F_PRECISION, 8); |
| 188 | ip[3] = w[0] >> 8; |
| 189 | ip[2] = w[0]; |
| 190 | ip[1] = w[1] >> 8; |
| 191 | ip[0] = w[1]; |
| 192 | rl78_bytes.n_ops += 4; |
| 193 | } |
| 194 | else |
| 195 | { |
| 196 | v = exp.X_add_number; |
| 197 | while (nbytes) |
| 198 | { |
| 199 | rl78_bytes.ops[rl78_bytes.n_ops++] =v & 0xff; |
| 200 | v >>= 8; |
| 201 | nbytes --; |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | else |
| 206 | { |
| 207 | if (nbytes > 2 |
| 208 | && exp.X_md == BFD_RELOC_RL78_CODE) |
| 209 | exp.X_md = 0; |
| 210 | |
| 211 | if (nbytes == 1 |
| 212 | && (exp.X_md == BFD_RELOC_RL78_LO16 |
| 213 | || exp.X_md == BFD_RELOC_RL78_HI16)) |
| 214 | as_bad (_("16-bit relocation used in 8-bit operand")); |
| 215 | |
| 216 | if (nbytes == 2 |
| 217 | && exp.X_md == BFD_RELOC_RL78_HI8) |
| 218 | as_bad (_("8-bit relocation used in 16-bit operand")); |
| 219 | |
| 220 | rl78_op_fixup (exp, rl78_bytes.n_ops * 8, nbytes * 8, type); |
| 221 | memset (rl78_bytes.ops + rl78_bytes.n_ops, 0, nbytes); |
| 222 | rl78_bytes.n_ops += nbytes; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* This gets complicated when the field spans bytes, because fields |
| 227 | are numbered from the MSB of the first byte as zero, and bits are |
| 228 | stored LSB towards the LSB of the byte. Thus, a simple four-bit |
| 229 | insertion of 12 at position 4 of 0x00 yields: 0x0b. A three-bit |
| 230 | insertion of b'MXL at position 7 is like this: |
| 231 | |
| 232 | - - - - - - - - - - - - - - - - |
| 233 | M X L */ |
| 234 | |
| 235 | void |
| 236 | rl78_field (int val, int pos, int sz) |
| 237 | { |
| 238 | int valm; |
| 239 | int bytep, bitp; |
| 240 | |
| 241 | if (sz > 0) |
| 242 | { |
| 243 | if (val < 0 || val >= (1 << sz)) |
| 244 | as_bad (_("Value %d doesn't fit in unsigned %d-bit field"), val, sz); |
| 245 | } |
| 246 | else |
| 247 | { |
| 248 | sz = - sz; |
| 249 | if (val < -(1 << (sz - 1)) || val >= (1 << (sz - 1))) |
| 250 | as_bad (_("Value %d doesn't fit in signed %d-bit field"), val, sz); |
| 251 | } |
| 252 | |
| 253 | /* This code points at 'M' in the above example. */ |
| 254 | bytep = pos / 8; |
| 255 | bitp = pos % 8; |
| 256 | |
| 257 | while (bitp + sz > 8) |
| 258 | { |
| 259 | int ssz = 8 - bitp; |
| 260 | int svalm; |
| 261 | |
| 262 | svalm = val >> (sz - ssz); |
| 263 | svalm = svalm & ((1 << ssz) - 1); |
| 264 | svalm = svalm << (8 - bitp - ssz); |
| 265 | gas_assert (bytep < rl78_bytes.n_base); |
| 266 | rl78_bytes.base[bytep] |= svalm; |
| 267 | |
| 268 | bitp = 0; |
| 269 | sz -= ssz; |
| 270 | bytep ++; |
| 271 | } |
| 272 | valm = val & ((1 << sz) - 1); |
| 273 | valm = valm << (8 - bitp - sz); |
| 274 | gas_assert (bytep < rl78_bytes.n_base); |
| 275 | rl78_bytes.base[bytep] |= valm; |
| 276 | } |
| 277 | |
| 278 | /*------------------------------------------------------------------*/ |
| 279 | |
| 280 | enum options |
| 281 | { |
| 282 | OPTION_RELAX = OPTION_MD_BASE, |
| 283 | OPTION_G10, |
| 284 | OPTION_32BIT_DOUBLES, |
| 285 | OPTION_64BIT_DOUBLES, |
| 286 | }; |
| 287 | |
| 288 | #define RL78_SHORTOPTS "" |
| 289 | const char * md_shortopts = RL78_SHORTOPTS; |
| 290 | |
| 291 | /* Assembler options. */ |
| 292 | struct option md_longopts[] = |
| 293 | { |
| 294 | {"relax", no_argument, NULL, OPTION_RELAX}, |
| 295 | {"mg10", no_argument, NULL, OPTION_G10}, |
| 296 | {"m32bit-doubles", no_argument, NULL, OPTION_32BIT_DOUBLES}, |
| 297 | {"m64bit-doubles", no_argument, NULL, OPTION_64BIT_DOUBLES}, |
| 298 | {NULL, no_argument, NULL, 0} |
| 299 | }; |
| 300 | size_t md_longopts_size = sizeof (md_longopts); |
| 301 | |
| 302 | int |
| 303 | md_parse_option (int c, char * arg ATTRIBUTE_UNUSED) |
| 304 | { |
| 305 | switch (c) |
| 306 | { |
| 307 | case OPTION_RELAX: |
| 308 | linkrelax = 1; |
| 309 | return 1; |
| 310 | |
| 311 | case OPTION_G10: |
| 312 | elf_flags |= E_FLAG_RL78_G10; |
| 313 | return 1; |
| 314 | |
| 315 | case OPTION_32BIT_DOUBLES: |
| 316 | elf_flags &= ~ E_FLAG_RL78_64BIT_DOUBLES; |
| 317 | return 1; |
| 318 | |
| 319 | case OPTION_64BIT_DOUBLES: |
| 320 | elf_flags |= E_FLAG_RL78_64BIT_DOUBLES; |
| 321 | return 1; |
| 322 | } |
| 323 | return 0; |
| 324 | } |
| 325 | |
| 326 | void |
| 327 | md_show_usage (FILE * stream ATTRIBUTE_UNUSED) |
| 328 | { |
| 329 | fprintf (stream, _(" RL78 specific command line options:\n")); |
| 330 | fprintf (stream, _(" --mg10 Enable support for G10 variant\n")); |
| 331 | fprintf (stream, _(" --m32bit-doubles [default]\n")); |
| 332 | fprintf (stream, _(" --m64bit-doubles\n")); |
| 333 | } |
| 334 | |
| 335 | static void |
| 336 | s_bss (int ignore ATTRIBUTE_UNUSED) |
| 337 | { |
| 338 | int temp; |
| 339 | |
| 340 | temp = get_absolute_expression (); |
| 341 | subseg_set (bss_section, (subsegT) temp); |
| 342 | demand_empty_rest_of_line (); |
| 343 | } |
| 344 | |
| 345 | static void |
| 346 | rl78_float_cons (int ignore ATTRIBUTE_UNUSED) |
| 347 | { |
| 348 | if (elf_flags & E_FLAG_RL78_64BIT_DOUBLES) |
| 349 | return float_cons ('d'); |
| 350 | return float_cons ('f'); |
| 351 | } |
| 352 | |
| 353 | /* The target specific pseudo-ops which we support. */ |
| 354 | const pseudo_typeS md_pseudo_table[] = |
| 355 | { |
| 356 | /* Our "standard" pseudos. */ |
| 357 | { "double", rl78_float_cons, 'd' }, |
| 358 | { "bss", s_bss, 0 }, |
| 359 | { "3byte", cons, 3 }, |
| 360 | { "int", cons, 4 }, |
| 361 | { "word", cons, 4 }, |
| 362 | |
| 363 | /* End of list marker. */ |
| 364 | { NULL, NULL, 0 } |
| 365 | }; |
| 366 | |
| 367 | void |
| 368 | md_begin (void) |
| 369 | { |
| 370 | } |
| 371 | |
| 372 | void |
| 373 | rl78_md_end (void) |
| 374 | { |
| 375 | } |
| 376 | |
| 377 | /* Set the ELF specific flags. */ |
| 378 | void |
| 379 | rl78_elf_final_processing (void) |
| 380 | { |
| 381 | elf_elfheader (stdoutput)->e_flags |= elf_flags; |
| 382 | } |
| 383 | |
| 384 | /* Write a value out to the object file, using the appropriate endianness. */ |
| 385 | void |
| 386 | md_number_to_chars (char * buf, valueT val, int n) |
| 387 | { |
| 388 | number_to_chars_littleendian (buf, val, n); |
| 389 | } |
| 390 | |
| 391 | static void |
| 392 | require_end_of_expr (char *fname) |
| 393 | { |
| 394 | while (* input_line_pointer == ' ' |
| 395 | || * input_line_pointer == '\t') |
| 396 | input_line_pointer ++; |
| 397 | |
| 398 | if (! * input_line_pointer |
| 399 | || strchr ("\n\r,", * input_line_pointer) |
| 400 | || strchr (comment_chars, * input_line_pointer) |
| 401 | || strchr (line_comment_chars, * input_line_pointer) |
| 402 | || strchr (line_separator_chars, * input_line_pointer)) |
| 403 | return; |
| 404 | |
| 405 | as_bad (_("%%%s() must be outermost term in expression"), fname); |
| 406 | } |
| 407 | |
| 408 | static struct |
| 409 | { |
| 410 | char * fname; |
| 411 | int reloc; |
| 412 | } |
| 413 | reloc_functions[] = |
| 414 | { |
| 415 | { "code", BFD_RELOC_RL78_CODE }, |
| 416 | { "lo16", BFD_RELOC_RL78_LO16 }, |
| 417 | { "hi16", BFD_RELOC_RL78_HI16 }, |
| 418 | { "hi8", BFD_RELOC_RL78_HI8 }, |
| 419 | { 0, 0 } |
| 420 | }; |
| 421 | |
| 422 | void |
| 423 | md_operand (expressionS * exp ATTRIBUTE_UNUSED) |
| 424 | { |
| 425 | int reloc = 0; |
| 426 | int i; |
| 427 | |
| 428 | for (i = 0; reloc_functions[i].fname; i++) |
| 429 | { |
| 430 | int flen = strlen (reloc_functions[i].fname); |
| 431 | |
| 432 | if (input_line_pointer[0] == '%' |
| 433 | && strncasecmp (input_line_pointer + 1, reloc_functions[i].fname, flen) == 0 |
| 434 | && input_line_pointer[flen + 1] == '(') |
| 435 | { |
| 436 | reloc = reloc_functions[i].reloc; |
| 437 | input_line_pointer += flen + 2; |
| 438 | break; |
| 439 | } |
| 440 | } |
| 441 | if (reloc == 0) |
| 442 | return; |
| 443 | |
| 444 | expression (exp); |
| 445 | if (* input_line_pointer == ')') |
| 446 | input_line_pointer ++; |
| 447 | |
| 448 | exp->X_md = reloc; |
| 449 | |
| 450 | require_end_of_expr (reloc_functions[i].fname); |
| 451 | } |
| 452 | |
| 453 | void |
| 454 | rl78_frag_init (fragS * fragP) |
| 455 | { |
| 456 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
| 457 | { |
| 458 | fragP->tc_frag_data = malloc (sizeof (rl78_bytesT)); |
| 459 | memcpy (fragP->tc_frag_data, & rl78_bytes, sizeof (rl78_bytesT)); |
| 460 | } |
| 461 | else |
| 462 | fragP->tc_frag_data = 0; |
| 463 | } |
| 464 | |
| 465 | /* When relaxing, we need to output a reloc for any .align directive |
| 466 | so that we can retain this alignment as we adjust opcode sizes. */ |
| 467 | void |
| 468 | rl78_handle_align (fragS * frag) |
| 469 | { |
| 470 | if (linkrelax |
| 471 | && (frag->fr_type == rs_align |
| 472 | || frag->fr_type == rs_align_code) |
| 473 | && frag->fr_address + frag->fr_fix > 0 |
| 474 | && frag->fr_offset > 0 |
| 475 | && now_seg != bss_section) |
| 476 | { |
| 477 | fix_new (frag, frag->fr_fix, 0, |
| 478 | &abs_symbol, RL78_RELAXA_ALIGN + frag->fr_offset, |
| 479 | 0, BFD_RELOC_RL78_RELAX); |
| 480 | /* For the purposes of relaxation, this relocation is attached |
| 481 | to the byte *after* the alignment - i.e. the byte that must |
| 482 | remain aligned. */ |
| 483 | fix_new (frag->fr_next, 0, 0, |
| 484 | &abs_symbol, RL78_RELAXA_ELIGN + frag->fr_offset, |
| 485 | 0, BFD_RELOC_RL78_RELAX); |
| 486 | } |
| 487 | } |
| 488 | |
| 489 | char * |
| 490 | md_atof (int type, char * litP, int * sizeP) |
| 491 | { |
| 492 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
| 493 | } |
| 494 | |
| 495 | symbolS * |
| 496 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) |
| 497 | { |
| 498 | return NULL; |
| 499 | } |
| 500 | |
| 501 | #define APPEND(B, N_B) \ |
| 502 | if (rl78_bytes.N_B) \ |
| 503 | { \ |
| 504 | memcpy (bytes + idx, rl78_bytes.B, rl78_bytes.N_B); \ |
| 505 | idx += rl78_bytes.N_B; \ |
| 506 | } |
| 507 | |
| 508 | |
| 509 | void |
| 510 | md_assemble (char * str) |
| 511 | { |
| 512 | char * bytes; |
| 513 | fragS * frag_then = frag_now; |
| 514 | int idx = 0; |
| 515 | int i; |
| 516 | int rel; |
| 517 | expressionS *exp; |
| 518 | |
| 519 | /*printf("\033[32mASM: %s\033[0m\n", str);*/ |
| 520 | |
| 521 | dwarf2_emit_insn (0); |
| 522 | |
| 523 | memset (& rl78_bytes, 0, sizeof (rl78_bytes)); |
| 524 | |
| 525 | rl78_lex_init (str, str + strlen (str)); |
| 526 | |
| 527 | rl78_parse (); |
| 528 | |
| 529 | /* This simplifies the relaxation code. */ |
| 530 | if (rl78_bytes.n_relax || rl78_bytes.link_relax) |
| 531 | { |
| 532 | int olen = rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops; |
| 533 | /* We do it this way because we want the frag to have the |
| 534 | rl78_bytes in it, which we initialize above. The extra bytes |
| 535 | are for relaxing. */ |
| 536 | bytes = frag_more (olen + 3); |
| 537 | frag_then = frag_now; |
| 538 | frag_variant (rs_machine_dependent, |
| 539 | olen /* max_chars */, |
| 540 | 0 /* var */, |
| 541 | olen /* subtype */, |
| 542 | 0 /* symbol */, |
| 543 | 0 /* offset */, |
| 544 | 0 /* opcode */); |
| 545 | frag_then->fr_opcode = bytes; |
| 546 | frag_then->fr_fix = olen + (bytes - frag_then->fr_literal); |
| 547 | frag_then->fr_subtype = olen; |
| 548 | frag_then->fr_var = 0; |
| 549 | } |
| 550 | else |
| 551 | { |
| 552 | bytes = frag_more (rl78_bytes.n_prefix + rl78_bytes.n_base + rl78_bytes.n_ops); |
| 553 | frag_then = frag_now; |
| 554 | } |
| 555 | |
| 556 | APPEND (prefix, n_prefix); |
| 557 | APPEND (base, n_base); |
| 558 | APPEND (ops, n_ops); |
| 559 | |
| 560 | if (rl78_bytes.link_relax) |
| 561 | { |
| 562 | fixS * f; |
| 563 | |
| 564 | f = fix_new (frag_then, |
| 565 | (char *) bytes - frag_then->fr_literal, |
| 566 | 0, |
| 567 | abs_section_sym, |
| 568 | rl78_bytes.link_relax | rl78_bytes.n_fixups, |
| 569 | 0, |
| 570 | BFD_RELOC_RL78_RELAX); |
| 571 | frag_then->tc_frag_data->link_relax_fixP = f; |
| 572 | } |
| 573 | |
| 574 | for (i = 0; i < rl78_bytes.n_fixups; i ++) |
| 575 | { |
| 576 | /* index: [nbytes][type] */ |
| 577 | static int reloc_map[5][4] = |
| 578 | { |
| 579 | { 0, 0 }, |
| 580 | { BFD_RELOC_8, BFD_RELOC_8_PCREL }, |
| 581 | { BFD_RELOC_16, BFD_RELOC_16_PCREL }, |
| 582 | { BFD_RELOC_24, BFD_RELOC_24_PCREL }, |
| 583 | { BFD_RELOC_32, BFD_RELOC_32_PCREL }, |
| 584 | }; |
| 585 | fixS * f; |
| 586 | |
| 587 | idx = rl78_bytes.fixups[i].offset / 8; |
| 588 | rel = reloc_map [rl78_bytes.fixups[i].nbits / 8][(int) rl78_bytes.fixups[i].type]; |
| 589 | |
| 590 | if (rl78_bytes.fixups[i].reloc) |
| 591 | rel = rl78_bytes.fixups[i].reloc; |
| 592 | |
| 593 | if (frag_then->tc_frag_data) |
| 594 | exp = & frag_then->tc_frag_data->fixups[i].exp; |
| 595 | else |
| 596 | exp = & rl78_bytes.fixups[i].exp; |
| 597 | |
| 598 | f = fix_new_exp (frag_then, |
| 599 | (char *) bytes + idx - frag_then->fr_literal, |
| 600 | rl78_bytes.fixups[i].nbits / 8, |
| 601 | exp, |
| 602 | rl78_bytes.fixups[i].type == RL78REL_PCREL ? 1 : 0, |
| 603 | rel); |
| 604 | if (frag_then->tc_frag_data) |
| 605 | frag_then->tc_frag_data->fixups[i].fixP = f; |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | void |
| 610 | rl78_cons_fix_new (fragS * frag, |
| 611 | int where, |
| 612 | int size, |
| 613 | expressionS * exp) |
| 614 | { |
| 615 | bfd_reloc_code_real_type type; |
| 616 | fixS *fixP; |
| 617 | |
| 618 | switch (size) |
| 619 | { |
| 620 | case 1: |
| 621 | type = BFD_RELOC_8; |
| 622 | break; |
| 623 | case 2: |
| 624 | type = BFD_RELOC_16; |
| 625 | break; |
| 626 | case 3: |
| 627 | type = BFD_RELOC_24; |
| 628 | break; |
| 629 | case 4: |
| 630 | type = BFD_RELOC_32; |
| 631 | break; |
| 632 | default: |
| 633 | as_bad (_("unsupported constant size %d\n"), size); |
| 634 | return; |
| 635 | } |
| 636 | |
| 637 | switch (exp->X_md) |
| 638 | { |
| 639 | case BFD_RELOC_RL78_CODE: |
| 640 | if (size == 2) |
| 641 | type = exp->X_md; |
| 642 | break; |
| 643 | case BFD_RELOC_RL78_LO16: |
| 644 | case BFD_RELOC_RL78_HI16: |
| 645 | if (size != 2) |
| 646 | as_bad (_("%%hi16/%%lo16 only applies to .short or .hword")); |
| 647 | type = exp->X_md; |
| 648 | break; |
| 649 | case BFD_RELOC_RL78_HI8: |
| 650 | if (size != 1) |
| 651 | as_bad (_("%%hi8 only applies to .byte")); |
| 652 | type = exp->X_md; |
| 653 | break; |
| 654 | default: |
| 655 | break; |
| 656 | } |
| 657 | |
| 658 | if (exp->X_op == O_subtract && exp->X_op_symbol) |
| 659 | { |
| 660 | if (size != 4 && size != 2 && size != 1) |
| 661 | as_bad (_("difference of two symbols only supported with .long, .short, or .byte")); |
| 662 | else |
| 663 | type = BFD_RELOC_RL78_DIFF; |
| 664 | } |
| 665 | |
| 666 | fixP = fix_new_exp (frag, where, (int) size, exp, 0, type); |
| 667 | switch (exp->X_md) |
| 668 | { |
| 669 | /* These are intended to have values larger than the container, |
| 670 | since the backend puts only the portion we need in it. |
| 671 | However, we don't have a backend-specific reloc for them as |
| 672 | they're handled with complex relocations. */ |
| 673 | case BFD_RELOC_RL78_LO16: |
| 674 | case BFD_RELOC_RL78_HI16: |
| 675 | case BFD_RELOC_RL78_HI8: |
| 676 | fixP->fx_no_overflow = 1; |
| 677 | break; |
| 678 | default: |
| 679 | break; |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | \f |
| 684 | /*----------------------------------------------------------------------*/ |
| 685 | /* To recap: we estimate everything based on md_estimate_size, then |
| 686 | adjust based on rl78_relax_frag. When it all settles, we call |
| 687 | md_convert frag to update the bytes. The relaxation types and |
| 688 | relocations are in fragP->tc_frag_data, which is a copy of that |
| 689 | rl78_bytes. |
| 690 | |
| 691 | Our scheme is as follows: fr_fix has the size of the smallest |
| 692 | opcode (like BRA.S). We store the number of total bytes we need in |
| 693 | fr_subtype. When we're done relaxing, we use fr_subtype and the |
| 694 | existing opcode bytes to figure out what actual opcode we need to |
| 695 | put in there. If the fixup isn't resolvable now, we use the |
| 696 | maximal size. */ |
| 697 | |
| 698 | #define TRACE_RELAX 0 |
| 699 | #define tprintf if (TRACE_RELAX) printf |
| 700 | |
| 701 | |
| 702 | typedef enum |
| 703 | { |
| 704 | OT_other, |
| 705 | OT_bt, |
| 706 | OT_bt_sfr, |
| 707 | OT_bt_es, |
| 708 | OT_bc, |
| 709 | OT_bh |
| 710 | } op_type_T; |
| 711 | |
| 712 | /* We're looking for these types of relaxations: |
| 713 | |
| 714 | BT 00110001 sbit0cc1 addr---- (cc is 10 (BF) or 01 (BT)) |
| 715 | B~T 00110001 sbit0cc1 00000011 11101110 pcrel16- -------- (BR $!pcrel20) |
| 716 | |
| 717 | BT sfr 00110001 sbit0cc0 sfr----- addr---- |
| 718 | BT ES: 00010001 00101110 sbit0cc1 addr---- |
| 719 | |
| 720 | BC 110111cc addr---- |
| 721 | B~C 110111cc 00000011 11101110 pcrel16- -------- (BR $!pcrel20) |
| 722 | |
| 723 | BH 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) |
| 724 | B~H 01100001 110c0011 00000011 11101110 pcrel16- -------- (BR $!pcrel20) |
| 725 | */ |
| 726 | |
| 727 | /* Given the opcode bytes at OP, figure out which opcode it is and |
| 728 | return the type of opcode. We use this to re-encode the opcode as |
| 729 | a different size later. */ |
| 730 | |
| 731 | static op_type_T |
| 732 | rl78_opcode_type (char * op) |
| 733 | { |
| 734 | if (op[0] == 0x31 |
| 735 | && ((op[1] & 0x0f) == 0x05 |
| 736 | || (op[1] & 0x0f) == 0x03)) |
| 737 | return OT_bt; |
| 738 | |
| 739 | if (op[0] == 0x31 |
| 740 | && ((op[1] & 0x0f) == 0x04 |
| 741 | || (op[1] & 0x0f) == 0x02)) |
| 742 | return OT_bt_sfr; |
| 743 | |
| 744 | if (op[0] == 0x11 |
| 745 | && op[1] == 0x31 |
| 746 | && ((op[2] & 0x0f) == 0x05 |
| 747 | || (op[2] & 0x0f) == 0x03)) |
| 748 | return OT_bt_es; |
| 749 | |
| 750 | if ((op[0] & 0xfc) == 0xdc) |
| 751 | return OT_bc; |
| 752 | |
| 753 | if (op[0] == 0x61 |
| 754 | && (op[1] & 0xef) == 0xc3) |
| 755 | return OT_bh; |
| 756 | |
| 757 | return OT_other; |
| 758 | } |
| 759 | |
| 760 | /* Returns zero if *addrP has the target address. Else returns nonzero |
| 761 | if we cannot compute the target address yet. */ |
| 762 | |
| 763 | static int |
| 764 | rl78_frag_fix_value (fragS * fragP, |
| 765 | segT segment, |
| 766 | int which, |
| 767 | addressT * addrP, |
| 768 | int need_diff, |
| 769 | addressT * sym_addr) |
| 770 | { |
| 771 | addressT addr = 0; |
| 772 | rl78_bytesT * b = fragP->tc_frag_data; |
| 773 | expressionS * exp = & b->fixups[which].exp; |
| 774 | |
| 775 | if (need_diff && exp->X_op != O_subtract) |
| 776 | return 1; |
| 777 | |
| 778 | if (exp->X_add_symbol) |
| 779 | { |
| 780 | if (S_FORCE_RELOC (exp->X_add_symbol, 1)) |
| 781 | return 1; |
| 782 | if (S_GET_SEGMENT (exp->X_add_symbol) != segment) |
| 783 | return 1; |
| 784 | addr += S_GET_VALUE (exp->X_add_symbol); |
| 785 | } |
| 786 | |
| 787 | if (exp->X_op_symbol) |
| 788 | { |
| 789 | if (exp->X_op != O_subtract) |
| 790 | return 1; |
| 791 | if (S_FORCE_RELOC (exp->X_op_symbol, 1)) |
| 792 | return 1; |
| 793 | if (S_GET_SEGMENT (exp->X_op_symbol) != segment) |
| 794 | return 1; |
| 795 | addr -= S_GET_VALUE (exp->X_op_symbol); |
| 796 | } |
| 797 | if (sym_addr) |
| 798 | * sym_addr = addr; |
| 799 | addr += exp->X_add_number; |
| 800 | * addrP = addr; |
| 801 | return 0; |
| 802 | } |
| 803 | |
| 804 | /* Estimate how big the opcode is after this relax pass. The return |
| 805 | value is the difference between fr_fix and the actual size. We |
| 806 | compute the total size in rl78_relax_frag and store it in fr_subtype, |
| 807 | sowe only need to subtract fx_fix and return it. */ |
| 808 | |
| 809 | int |
| 810 | md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED, segT segment ATTRIBUTE_UNUSED) |
| 811 | { |
| 812 | int opfixsize; |
| 813 | int delta; |
| 814 | |
| 815 | /* This is the size of the opcode that's accounted for in fr_fix. */ |
| 816 | opfixsize = fragP->fr_fix - (fragP->fr_opcode - fragP->fr_literal); |
| 817 | /* This is the size of the opcode that isn't. */ |
| 818 | delta = (fragP->fr_subtype - opfixsize); |
| 819 | |
| 820 | tprintf (" -> opfixsize %d delta %d\n", opfixsize, delta); |
| 821 | return delta; |
| 822 | } |
| 823 | |
| 824 | /* Given the new addresses for this relax pass, figure out how big |
| 825 | each opcode must be. We store the total number of bytes needed in |
| 826 | fr_subtype. The return value is the difference between the size |
| 827 | after the last pass and the size after this pass, so we use the old |
| 828 | fr_subtype to calculate the difference. */ |
| 829 | |
| 830 | int |
| 831 | rl78_relax_frag (segT segment ATTRIBUTE_UNUSED, fragS * fragP, long stretch) |
| 832 | { |
| 833 | addressT addr0, sym_addr; |
| 834 | addressT mypc; |
| 835 | int disp; |
| 836 | int oldsize = fragP->fr_subtype; |
| 837 | int newsize = oldsize; |
| 838 | op_type_T optype; |
| 839 | int ri; |
| 840 | |
| 841 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); |
| 842 | |
| 843 | /* If we ever get more than one reloc per opcode, this is the one |
| 844 | we're relaxing. */ |
| 845 | ri = 0; |
| 846 | |
| 847 | optype = rl78_opcode_type (fragP->fr_opcode); |
| 848 | /* Try to get the target address. */ |
| 849 | if (rl78_frag_fix_value (fragP, segment, ri, & addr0, |
| 850 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, |
| 851 | & sym_addr)) |
| 852 | { |
| 853 | /* If we don't, we must use the maximum size for the linker. */ |
| 854 | switch (fragP->tc_frag_data->relax[ri].type) |
| 855 | { |
| 856 | case RL78_RELAX_BRANCH: |
| 857 | switch (optype) |
| 858 | { |
| 859 | case OT_bt: |
| 860 | newsize = 6; |
| 861 | break; |
| 862 | case OT_bt_sfr: |
| 863 | case OT_bt_es: |
| 864 | newsize = 7; |
| 865 | break; |
| 866 | case OT_bc: |
| 867 | newsize = 5; |
| 868 | break; |
| 869 | case OT_bh: |
| 870 | newsize = 6; |
| 871 | break; |
| 872 | case OT_other: |
| 873 | newsize = oldsize; |
| 874 | break; |
| 875 | } |
| 876 | break; |
| 877 | |
| 878 | } |
| 879 | fragP->fr_subtype = newsize; |
| 880 | tprintf (" -> new %d old %d delta %d (external)\n", newsize, oldsize, newsize-oldsize); |
| 881 | return newsize - oldsize; |
| 882 | } |
| 883 | |
| 884 | if (sym_addr > mypc) |
| 885 | addr0 += stretch; |
| 886 | |
| 887 | switch (fragP->tc_frag_data->relax[ri].type) |
| 888 | { |
| 889 | case RL78_RELAX_BRANCH: |
| 890 | disp = (int) addr0 - (int) mypc; |
| 891 | |
| 892 | switch (optype) |
| 893 | { |
| 894 | case OT_bt: |
| 895 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) |
| 896 | newsize = 3; |
| 897 | else |
| 898 | newsize = 6; |
| 899 | break; |
| 900 | case OT_bt_sfr: |
| 901 | case OT_bt_es: |
| 902 | if (disp >= -128 && (disp - (oldsize-3)) <= 127) |
| 903 | newsize = 4; |
| 904 | else |
| 905 | newsize = 7; |
| 906 | break; |
| 907 | case OT_bc: |
| 908 | if (disp >= -128 && (disp - (oldsize-1)) <= 127) |
| 909 | newsize = 2; |
| 910 | else |
| 911 | newsize = 5; |
| 912 | break; |
| 913 | case OT_bh: |
| 914 | if (disp >= -128 && (disp - (oldsize-2)) <= 127) |
| 915 | newsize = 3; |
| 916 | else |
| 917 | newsize = 6; |
| 918 | break; |
| 919 | case OT_other: |
| 920 | newsize = oldsize; |
| 921 | break; |
| 922 | } |
| 923 | break; |
| 924 | } |
| 925 | |
| 926 | /* This prevents infinite loops in align-heavy sources. */ |
| 927 | if (newsize < oldsize) |
| 928 | { |
| 929 | if (fragP->tc_frag_data->times_shrank > 10 |
| 930 | && fragP->tc_frag_data->times_grown > 10) |
| 931 | newsize = oldsize; |
| 932 | if (fragP->tc_frag_data->times_shrank < 20) |
| 933 | fragP->tc_frag_data->times_shrank ++; |
| 934 | } |
| 935 | else if (newsize > oldsize) |
| 936 | { |
| 937 | if (fragP->tc_frag_data->times_grown < 20) |
| 938 | fragP->tc_frag_data->times_grown ++; |
| 939 | } |
| 940 | |
| 941 | fragP->fr_subtype = newsize; |
| 942 | tprintf (" -> new %d old %d delta %d\n", newsize, oldsize, newsize-oldsize); |
| 943 | return newsize - oldsize; |
| 944 | } |
| 945 | |
| 946 | /* This lets us test for the opcode type and the desired size in a |
| 947 | switch statement. */ |
| 948 | #define OPCODE(type,size) ((type) * 16 + (size)) |
| 949 | |
| 950 | /* Given the opcode stored in fr_opcode and the number of bytes we |
| 951 | think we need, encode a new opcode. We stored a pointer to the |
| 952 | fixup for this opcode in the tc_frag_data structure. If we can do |
| 953 | the fixup here, we change the relocation type to "none" (we test |
| 954 | for that in tc_gen_reloc) else we change it to the right type for |
| 955 | the new (biggest) opcode. */ |
| 956 | |
| 957 | void |
| 958 | md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, |
| 959 | segT segment ATTRIBUTE_UNUSED, |
| 960 | fragS * fragP ATTRIBUTE_UNUSED) |
| 961 | { |
| 962 | rl78_bytesT * rl78b = fragP->tc_frag_data; |
| 963 | addressT addr0, mypc; |
| 964 | int disp; |
| 965 | int reloc_type, reloc_adjust; |
| 966 | char * op = fragP->fr_opcode; |
| 967 | int keep_reloc = 0; |
| 968 | int ri; |
| 969 | int fi = (rl78b->n_fixups > 1) ? 1 : 0; |
| 970 | fixS * fix = rl78b->fixups[fi].fixP; |
| 971 | |
| 972 | /* If we ever get more than one reloc per opcode, this is the one |
| 973 | we're relaxing. */ |
| 974 | ri = 0; |
| 975 | |
| 976 | /* We used a new frag for this opcode, so the opcode address should |
| 977 | be the frag address. */ |
| 978 | mypc = fragP->fr_address + (fragP->fr_opcode - fragP->fr_literal); |
| 979 | tprintf("\033[32mmypc: 0x%x\033[0m\n", (int)mypc); |
| 980 | |
| 981 | /* Try to get the target address. If we fail here, we just use the |
| 982 | largest format. */ |
| 983 | if (rl78_frag_fix_value (fragP, segment, 0, & addr0, |
| 984 | fragP->tc_frag_data->relax[ri].type != RL78_RELAX_BRANCH, 0)) |
| 985 | { |
| 986 | /* We don't know the target address. */ |
| 987 | keep_reloc = 1; |
| 988 | addr0 = 0; |
| 989 | disp = 0; |
| 990 | tprintf ("unknown addr ? - %x = ?\n", (int)mypc); |
| 991 | } |
| 992 | else |
| 993 | { |
| 994 | /* We know the target address, and it's in addr0. */ |
| 995 | disp = (int) addr0 - (int) mypc; |
| 996 | tprintf ("known addr %x - %x = %d\n", (int)addr0, (int)mypc, disp); |
| 997 | } |
| 998 | |
| 999 | if (linkrelax) |
| 1000 | keep_reloc = 1; |
| 1001 | |
| 1002 | reloc_type = BFD_RELOC_NONE; |
| 1003 | reloc_adjust = 0; |
| 1004 | |
| 1005 | switch (fragP->tc_frag_data->relax[ri].type) |
| 1006 | { |
| 1007 | case RL78_RELAX_BRANCH: |
| 1008 | switch (OPCODE (rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype)) |
| 1009 | { |
| 1010 | |
| 1011 | case OPCODE (OT_bt, 3): /* BT A,$ - no change. */ |
| 1012 | disp -= 3; |
| 1013 | op[2] = disp; |
| 1014 | break; |
| 1015 | |
| 1016 | case OPCODE (OT_bt, 6): /* BT A,$ - long version. */ |
| 1017 | disp -= 3; |
| 1018 | op[1] ^= 0x06; /* toggle conditional. */ |
| 1019 | op[2] = 3; /* displacement over long branch. */ |
| 1020 | disp -= 3; |
| 1021 | op[3] = 0xEE; /* BR $!addr20 */ |
| 1022 | op[4] = disp & 0xff; |
| 1023 | op[5] = disp >> 8; |
| 1024 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; |
| 1025 | reloc_adjust = 2; |
| 1026 | break; |
| 1027 | |
| 1028 | case OPCODE (OT_bt_sfr, 4): /* BT PSW,$ - no change. */ |
| 1029 | disp -= 4; |
| 1030 | op[3] = disp; |
| 1031 | break; |
| 1032 | |
| 1033 | case OPCODE (OT_bt_sfr, 7): /* BT PSW,$ - long version. */ |
| 1034 | disp -= 4; |
| 1035 | op[1] ^= 0x06; /* toggle conditional. */ |
| 1036 | op[3] = 3; /* displacement over long branch. */ |
| 1037 | disp -= 3; |
| 1038 | op[4] = 0xEE; /* BR $!addr20 */ |
| 1039 | op[5] = disp & 0xff; |
| 1040 | op[6] = disp >> 8; |
| 1041 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; |
| 1042 | reloc_adjust = 2; |
| 1043 | break; |
| 1044 | |
| 1045 | case OPCODE (OT_bt_es, 4): /* BT ES:[HL],$ - no change. */ |
| 1046 | disp -= 4; |
| 1047 | op[3] = disp; |
| 1048 | break; |
| 1049 | |
| 1050 | case OPCODE (OT_bt_es, 7): /* BT PSW,$ - long version. */ |
| 1051 | disp -= 4; |
| 1052 | op[2] ^= 0x06; /* toggle conditional. */ |
| 1053 | op[3] = 3; /* displacement over long branch. */ |
| 1054 | disp -= 3; |
| 1055 | op[4] = 0xEE; /* BR $!addr20 */ |
| 1056 | op[5] = disp & 0xff; |
| 1057 | op[6] = disp >> 8; |
| 1058 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; |
| 1059 | reloc_adjust = 2; |
| 1060 | break; |
| 1061 | |
| 1062 | case OPCODE (OT_bc, 2): /* BC $ - no change. */ |
| 1063 | disp -= 2; |
| 1064 | op[1] = disp; |
| 1065 | break; |
| 1066 | |
| 1067 | case OPCODE (OT_bc, 5): /* BC $ - long version. */ |
| 1068 | disp -= 2; |
| 1069 | op[0] ^= 0x02; /* toggle conditional. */ |
| 1070 | op[1] = 3; |
| 1071 | disp -= 3; |
| 1072 | op[2] = 0xEE; /* BR $!addr20 */ |
| 1073 | op[3] = disp & 0xff; |
| 1074 | op[4] = disp >> 8; |
| 1075 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; |
| 1076 | reloc_adjust = 2; |
| 1077 | break; |
| 1078 | |
| 1079 | case OPCODE (OT_bh, 3): /* BH $ - no change. */ |
| 1080 | disp -= 3; |
| 1081 | op[2] = disp; |
| 1082 | break; |
| 1083 | |
| 1084 | case OPCODE (OT_bh, 6): /* BC $ - long version. */ |
| 1085 | disp -= 3; |
| 1086 | op[1] ^= 0x10; /* toggle conditional. */ |
| 1087 | op[2] = 3; |
| 1088 | disp -= 3; |
| 1089 | op[3] = 0xEE; /* BR $!addr20 */ |
| 1090 | op[4] = disp & 0xff; |
| 1091 | op[5] = disp >> 8; |
| 1092 | reloc_type = keep_reloc ? BFD_RELOC_16_PCREL : BFD_RELOC_NONE; |
| 1093 | reloc_adjust = 2; |
| 1094 | break; |
| 1095 | |
| 1096 | default: |
| 1097 | fprintf(stderr, "Missed case %d %d at 0x%lx\n", |
| 1098 | rl78_opcode_type (fragP->fr_opcode), fragP->fr_subtype, mypc); |
| 1099 | abort (); |
| 1100 | |
| 1101 | } |
| 1102 | break; |
| 1103 | |
| 1104 | default: |
| 1105 | if (rl78b->n_fixups) |
| 1106 | { |
| 1107 | reloc_type = fix->fx_r_type; |
| 1108 | reloc_adjust = 0; |
| 1109 | } |
| 1110 | break; |
| 1111 | } |
| 1112 | |
| 1113 | if (rl78b->n_fixups) |
| 1114 | { |
| 1115 | |
| 1116 | fix->fx_r_type = reloc_type; |
| 1117 | fix->fx_where += reloc_adjust; |
| 1118 | switch (reloc_type) |
| 1119 | { |
| 1120 | case BFD_RELOC_NONE: |
| 1121 | fix->fx_size = 0; |
| 1122 | break; |
| 1123 | case BFD_RELOC_8: |
| 1124 | fix->fx_size = 1; |
| 1125 | break; |
| 1126 | case BFD_RELOC_16_PCREL: |
| 1127 | fix->fx_size = 2; |
| 1128 | break; |
| 1129 | } |
| 1130 | } |
| 1131 | |
| 1132 | fragP->fr_fix = fragP->fr_subtype + (fragP->fr_opcode - fragP->fr_literal); |
| 1133 | tprintf ("fragP->fr_fix now %ld (%d + (%p - %p)\n", (long) fragP->fr_fix, |
| 1134 | fragP->fr_subtype, fragP->fr_opcode, fragP->fr_literal); |
| 1135 | fragP->fr_var = 0; |
| 1136 | |
| 1137 | tprintf ("compare 0x%lx vs 0x%lx - 0x%lx = 0x%lx (%p)\n", |
| 1138 | (long)fragP->fr_fix, |
| 1139 | (long)fragP->fr_next->fr_address, (long)fragP->fr_address, |
| 1140 | (long)(fragP->fr_next->fr_address - fragP->fr_address), |
| 1141 | fragP->fr_next); |
| 1142 | |
| 1143 | if (fragP->fr_next != NULL |
| 1144 | && ((offsetT) (fragP->fr_next->fr_address - fragP->fr_address) |
| 1145 | != fragP->fr_fix)) |
| 1146 | as_bad (_("bad frag at %p : fix %ld addr %ld %ld \n"), fragP, |
| 1147 | (long) fragP->fr_fix, |
| 1148 | (long) fragP->fr_address, (long) fragP->fr_next->fr_address); |
| 1149 | } |
| 1150 | |
| 1151 | /* End of relaxation code. |
| 1152 | ----------------------------------------------------------------------*/ |
| 1153 | \f |
| 1154 | |
| 1155 | arelent ** |
| 1156 | tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp) |
| 1157 | { |
| 1158 | static arelent * reloc[8]; |
| 1159 | int rp; |
| 1160 | |
| 1161 | if (fixp->fx_r_type == BFD_RELOC_NONE) |
| 1162 | { |
| 1163 | reloc[0] = NULL; |
| 1164 | return reloc; |
| 1165 | } |
| 1166 | |
| 1167 | if (fixp->fx_subsy |
| 1168 | && S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 1169 | { |
| 1170 | fixp->fx_offset -= S_GET_VALUE (fixp->fx_subsy); |
| 1171 | fixp->fx_subsy = NULL; |
| 1172 | } |
| 1173 | |
| 1174 | reloc[0] = (arelent *) xmalloc (sizeof (arelent)); |
| 1175 | reloc[0]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); |
| 1176 | * reloc[0]->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 1177 | reloc[0]->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 1178 | reloc[0]->addend = fixp->fx_offset; |
| 1179 | |
| 1180 | if (fixp->fx_r_type == BFD_RELOC_RL78_32_OP |
| 1181 | && fixp->fx_subsy) |
| 1182 | { |
| 1183 | fixp->fx_r_type = BFD_RELOC_RL78_DIFF; |
| 1184 | } |
| 1185 | |
| 1186 | #define OPX(REL,SYM,ADD) \ |
| 1187 | reloc[rp] = (arelent *) xmalloc (sizeof (arelent)); \ |
| 1188 | reloc[rp]->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); \ |
| 1189 | reloc[rp]->howto = bfd_reloc_type_lookup (stdoutput, REL); \ |
| 1190 | reloc[rp]->addend = ADD; \ |
| 1191 | * reloc[rp]->sym_ptr_ptr = SYM; \ |
| 1192 | reloc[rp]->address = fixp->fx_frag->fr_address + fixp->fx_where; \ |
| 1193 | reloc[++rp] = NULL |
| 1194 | #define OPSYM(SYM) OPX(BFD_RELOC_RL78_SYM, SYM, 0) |
| 1195 | #define OPIMM(IMM) OPX(BFD_RELOC_RL78_SYM, abs_symbol.bsym, IMM) |
| 1196 | #define OP(OP) OPX(BFD_RELOC_RL78_##OP, *reloc[0]->sym_ptr_ptr, 0) |
| 1197 | #define SYM0() reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_SYM) |
| 1198 | |
| 1199 | rp = 1; |
| 1200 | |
| 1201 | /* Certain BFD relocations cannot be translated directly into |
| 1202 | a single (non-Red Hat) RL78 relocation, but instead need |
| 1203 | multiple RL78 relocations - handle them here. */ |
| 1204 | switch (fixp->fx_r_type) |
| 1205 | { |
| 1206 | case BFD_RELOC_RL78_DIFF: |
| 1207 | SYM0 (); |
| 1208 | OPSYM (symbol_get_bfdsym (fixp->fx_subsy)); |
| 1209 | OP(OP_SUBTRACT); |
| 1210 | |
| 1211 | switch (fixp->fx_size) |
| 1212 | { |
| 1213 | case 1: |
| 1214 | OP(ABS8); |
| 1215 | break; |
| 1216 | case 2: |
| 1217 | OP (ABS16); |
| 1218 | break; |
| 1219 | case 4: |
| 1220 | OP (ABS32); |
| 1221 | break; |
| 1222 | } |
| 1223 | break; |
| 1224 | |
| 1225 | case BFD_RELOC_RL78_NEG32: |
| 1226 | SYM0 (); |
| 1227 | OP (OP_NEG); |
| 1228 | OP (ABS32); |
| 1229 | break; |
| 1230 | |
| 1231 | case BFD_RELOC_RL78_CODE: |
| 1232 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_RL78_16U); |
| 1233 | reloc[1] = NULL; |
| 1234 | break; |
| 1235 | |
| 1236 | case BFD_RELOC_RL78_LO16: |
| 1237 | SYM0 (); |
| 1238 | OPIMM (0xffff); |
| 1239 | OP (OP_AND); |
| 1240 | OP (ABS16); |
| 1241 | break; |
| 1242 | |
| 1243 | case BFD_RELOC_RL78_HI16: |
| 1244 | SYM0 (); |
| 1245 | OPIMM (16); |
| 1246 | OP (OP_SHRA); |
| 1247 | OP (ABS16); |
| 1248 | break; |
| 1249 | |
| 1250 | case BFD_RELOC_RL78_HI8: |
| 1251 | SYM0 (); |
| 1252 | OPIMM (16); |
| 1253 | OP (OP_SHRA); |
| 1254 | OPIMM (0xff); |
| 1255 | OP (OP_AND); |
| 1256 | OP (ABS8); |
| 1257 | break; |
| 1258 | |
| 1259 | default: |
| 1260 | reloc[0]->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 1261 | reloc[1] = NULL; |
| 1262 | break; |
| 1263 | } |
| 1264 | |
| 1265 | return reloc; |
| 1266 | } |
| 1267 | |
| 1268 | int |
| 1269 | rl78_validate_fix_sub (struct fix * f) |
| 1270 | { |
| 1271 | /* We permit the subtraction of two symbols in a few cases. */ |
| 1272 | /* mov #sym1-sym2, R3 */ |
| 1273 | if (f->fx_r_type == BFD_RELOC_RL78_32_OP) |
| 1274 | return 1; |
| 1275 | /* .long sym1-sym2 */ |
| 1276 | if (f->fx_r_type == BFD_RELOC_RL78_DIFF |
| 1277 | && ! f->fx_pcrel |
| 1278 | && (f->fx_size == 4 || f->fx_size == 2 || f->fx_size == 1)) |
| 1279 | return 1; |
| 1280 | return 0; |
| 1281 | } |
| 1282 | |
| 1283 | long |
| 1284 | md_pcrel_from_section (fixS * fixP, segT sec) |
| 1285 | { |
| 1286 | long rv; |
| 1287 | |
| 1288 | if (fixP->fx_addsy != NULL |
| 1289 | && (! S_IS_DEFINED (fixP->fx_addsy) |
| 1290 | || S_GET_SEGMENT (fixP->fx_addsy) != sec)) |
| 1291 | /* The symbol is undefined (or is defined but not in this section). |
| 1292 | Let the linker figure it out. */ |
| 1293 | return 0; |
| 1294 | |
| 1295 | rv = fixP->fx_frag->fr_address + fixP->fx_where; |
| 1296 | switch (fixP->fx_r_type) |
| 1297 | { |
| 1298 | case BFD_RELOC_8_PCREL: |
| 1299 | rv += 1; |
| 1300 | break; |
| 1301 | case BFD_RELOC_16_PCREL: |
| 1302 | rv += 2; |
| 1303 | break; |
| 1304 | default: |
| 1305 | break; |
| 1306 | } |
| 1307 | return rv; |
| 1308 | } |
| 1309 | |
| 1310 | void |
| 1311 | md_apply_fix (struct fix * f ATTRIBUTE_UNUSED, |
| 1312 | valueT * t ATTRIBUTE_UNUSED, |
| 1313 | segT s ATTRIBUTE_UNUSED) |
| 1314 | { |
| 1315 | char * op; |
| 1316 | unsigned long val; |
| 1317 | |
| 1318 | if (f->fx_addsy && S_FORCE_RELOC (f->fx_addsy, 1)) |
| 1319 | return; |
| 1320 | if (f->fx_subsy && S_FORCE_RELOC (f->fx_subsy, 1)) |
| 1321 | return; |
| 1322 | |
| 1323 | op = f->fx_frag->fr_literal + f->fx_where; |
| 1324 | val = (unsigned long) * t; |
| 1325 | |
| 1326 | switch (f->fx_r_type) |
| 1327 | { |
| 1328 | case BFD_RELOC_NONE: |
| 1329 | break; |
| 1330 | |
| 1331 | case BFD_RELOC_RL78_RELAX: |
| 1332 | f->fx_done = 1; |
| 1333 | break; |
| 1334 | |
| 1335 | case BFD_RELOC_8_PCREL: |
| 1336 | if ((long)val < -128 || (long)val > 127) |
| 1337 | as_bad_where (f->fx_file, f->fx_line, |
| 1338 | _("value of %ld too large for 8-bit branch"), |
| 1339 | val); |
| 1340 | /* Fall through. */ |
| 1341 | case BFD_RELOC_8: |
| 1342 | op[0] = val; |
| 1343 | break; |
| 1344 | |
| 1345 | case BFD_RELOC_16_PCREL: |
| 1346 | if ((long)val < -32768 || (long)val > 32767) |
| 1347 | as_bad_where (f->fx_file, f->fx_line, |
| 1348 | _("value of %ld too large for 16-bit branch"), |
| 1349 | val); |
| 1350 | /* Fall through. */ |
| 1351 | case BFD_RELOC_16: |
| 1352 | case BFD_RELOC_RL78_CODE: |
| 1353 | op[0] = val; |
| 1354 | op[1] = val >> 8; |
| 1355 | break; |
| 1356 | |
| 1357 | case BFD_RELOC_24: |
| 1358 | op[0] = val; |
| 1359 | op[1] = val >> 8; |
| 1360 | op[2] = val >> 16; |
| 1361 | break; |
| 1362 | |
| 1363 | case BFD_RELOC_32: |
| 1364 | op[0] = val; |
| 1365 | op[1] = val >> 8; |
| 1366 | op[2] = val >> 16; |
| 1367 | op[3] = val >> 24; |
| 1368 | break; |
| 1369 | |
| 1370 | case BFD_RELOC_RL78_DIFF: |
| 1371 | op[0] = val; |
| 1372 | if (f->fx_size > 1) |
| 1373 | op[1] = val >> 8; |
| 1374 | if (f->fx_size > 2) |
| 1375 | op[2] = val >> 16; |
| 1376 | if (f->fx_size > 3) |
| 1377 | op[3] = val >> 24; |
| 1378 | break; |
| 1379 | |
| 1380 | case BFD_RELOC_RL78_HI8: |
| 1381 | val = val >> 16; |
| 1382 | op[0] = val; |
| 1383 | break; |
| 1384 | |
| 1385 | case BFD_RELOC_RL78_HI16: |
| 1386 | val = val >> 16; |
| 1387 | op[0] = val; |
| 1388 | op[1] = val >> 8; |
| 1389 | break; |
| 1390 | |
| 1391 | case BFD_RELOC_RL78_LO16: |
| 1392 | op[0] = val; |
| 1393 | op[1] = val >> 8; |
| 1394 | break; |
| 1395 | |
| 1396 | default: |
| 1397 | as_bad (_("Unknown reloc in md_apply_fix: %s"), |
| 1398 | bfd_get_reloc_code_name (f->fx_r_type)); |
| 1399 | break; |
| 1400 | } |
| 1401 | |
| 1402 | if (f->fx_addsy == NULL) |
| 1403 | f->fx_done = 1; |
| 1404 | } |
| 1405 | |
| 1406 | valueT |
| 1407 | md_section_align (segT segment, valueT size) |
| 1408 | { |
| 1409 | int align = bfd_get_section_alignment (stdoutput, segment); |
| 1410 | return ((size + (1 << align) - 1) & (-1 << align)); |
| 1411 | } |