| 1 | /* tc-ppc.c -- Assemble for the PowerPC or POWER (RS/6000) |
| 2 | Copyright (C) 1994 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 20 | |
| 21 | #include <stdio.h> |
| 22 | #include <ctype.h> |
| 23 | #include "as.h" |
| 24 | #include "subsegs.h" |
| 25 | |
| 26 | #include "opcode/ppc.h" |
| 27 | |
| 28 | #ifdef OBJ_ELF |
| 29 | #include "elf/ppc.h" |
| 30 | #endif |
| 31 | |
| 32 | /* This is the assembler for the PowerPC or POWER (RS/6000) chips. */ |
| 33 | |
| 34 | /* FIXME: This should be handled in a different way. */ |
| 35 | extern int target_big_endian; |
| 36 | |
| 37 | static void ppc_set_cpu PARAMS ((void)); |
| 38 | static unsigned long ppc_insert_operand |
| 39 | PARAMS ((unsigned long insn, const struct powerpc_operand *operand, |
| 40 | offsetT val, char *file, unsigned int line)); |
| 41 | static void ppc_macro PARAMS ((char *str, const struct powerpc_macro *macro)); |
| 42 | static void ppc_byte PARAMS ((int)); |
| 43 | static int ppc_is_toc_sym PARAMS ((symbolS *sym)); |
| 44 | static void ppc_tc PARAMS ((int)); |
| 45 | #ifdef OBJ_COFF |
| 46 | static void ppc_comm PARAMS ((int)); |
| 47 | static void ppc_bb PARAMS ((int)); |
| 48 | static void ppc_bf PARAMS ((int)); |
| 49 | static void ppc_biei PARAMS ((int)); |
| 50 | static void ppc_bs PARAMS ((int)); |
| 51 | static void ppc_eb PARAMS ((int)); |
| 52 | static void ppc_ef PARAMS ((int)); |
| 53 | static void ppc_es PARAMS ((int)); |
| 54 | static void ppc_csect PARAMS ((int)); |
| 55 | static void ppc_function PARAMS ((int)); |
| 56 | static void ppc_extern PARAMS ((int)); |
| 57 | static void ppc_lglobl PARAMS ((int)); |
| 58 | static void ppc_stabx PARAMS ((int)); |
| 59 | static void ppc_rename PARAMS ((int)); |
| 60 | static void ppc_toc PARAMS ((int)); |
| 61 | #endif |
| 62 | #ifdef OBJ_ELF |
| 63 | static bfd_reloc_code_real_type ppc_elf_suffix PARAMS ((char **)); |
| 64 | static void ppc_elf_cons PARAMS ((int)); |
| 65 | static void ppc_elf_validate_fix (fixS *, segT); |
| 66 | #endif |
| 67 | \f |
| 68 | /* Generic assembler global variables which must be defined by all |
| 69 | targets. */ |
| 70 | |
| 71 | /* Characters which always start a comment. */ |
| 72 | const char comment_chars[] = "#"; |
| 73 | |
| 74 | /* Characters which start a comment at the beginning of a line. */ |
| 75 | const char line_comment_chars[] = "#"; |
| 76 | |
| 77 | /* Characters which may be used to separate multiple commands on a |
| 78 | single line. */ |
| 79 | const char line_separator_chars[] = ";"; |
| 80 | |
| 81 | /* Characters which are used to indicate an exponent in a floating |
| 82 | point number. */ |
| 83 | const char EXP_CHARS[] = "eE"; |
| 84 | |
| 85 | /* Characters which mean that a number is a floating point constant, |
| 86 | as in 0d1.0. */ |
| 87 | const char FLT_CHARS[] = "dD"; |
| 88 | \f |
| 89 | /* The target specific pseudo-ops which we support. */ |
| 90 | |
| 91 | const pseudo_typeS md_pseudo_table[] = |
| 92 | { |
| 93 | /* Pseudo-ops which must be overridden. */ |
| 94 | { "byte", ppc_byte, 0 }, |
| 95 | |
| 96 | #ifdef OBJ_COFF |
| 97 | /* Pseudo-ops specific to the RS/6000 XCOFF format. Some of these |
| 98 | legitimately belong in the obj-*.c file. However, XCOFF is based |
| 99 | on COFF, and is only implemented for the RS/6000. We just use |
| 100 | obj-coff.c, and add what we need here. */ |
| 101 | { "comm", ppc_comm, 0 }, |
| 102 | { "lcomm", ppc_comm, 1 }, |
| 103 | { "bb", ppc_bb, 0 }, |
| 104 | { "bf", ppc_bf, 0 }, |
| 105 | { "bi", ppc_biei, 0 }, |
| 106 | { "bs", ppc_bs, 0 }, |
| 107 | { "csect", ppc_csect, 0 }, |
| 108 | { "eb", ppc_eb, 0 }, |
| 109 | { "ef", ppc_ef, 0 }, |
| 110 | { "ei", ppc_biei, 1 }, |
| 111 | { "es", ppc_es, 0 }, |
| 112 | { "extern", ppc_extern, 0 }, |
| 113 | { "function", ppc_function, 0 }, |
| 114 | { "lglobl", ppc_lglobl, 0 }, |
| 115 | { "rename", ppc_rename, 0 }, |
| 116 | { "stabx", ppc_stabx, 0 }, |
| 117 | { "toc", ppc_toc, 0 }, |
| 118 | #endif |
| 119 | #ifdef OBJ_ELF |
| 120 | { "long", ppc_elf_cons, 4 }, |
| 121 | { "word", ppc_elf_cons, 2 }, |
| 122 | { "short", ppc_elf_cons, 2 }, |
| 123 | #endif |
| 124 | |
| 125 | /* This pseudo-op is used even when not generating XCOFF output. */ |
| 126 | { "tc", ppc_tc, 0 }, |
| 127 | |
| 128 | { NULL, NULL, 0 } |
| 129 | }; |
| 130 | \f |
| 131 | /* Local variables. */ |
| 132 | |
| 133 | /* The type of processor we are assembling for. This is one or more |
| 134 | of the PPC_OPCODE flags defined in opcode/ppc.h. */ |
| 135 | static int ppc_cpu = 0; |
| 136 | |
| 137 | /* The size of the processor we are assembling for. This is either |
| 138 | PPC_OPCODE_32 or PPC_OPCODE_64. */ |
| 139 | static int ppc_size = PPC_OPCODE_32; |
| 140 | |
| 141 | /* The endianness we are using. */ |
| 142 | static int ppc_big_endian = PPC_BIG_ENDIAN; |
| 143 | |
| 144 | /* Opcode hash table. */ |
| 145 | static struct hash_control *ppc_hash; |
| 146 | |
| 147 | /* Macro hash table. */ |
| 148 | static struct hash_control *ppc_macro_hash; |
| 149 | |
| 150 | #ifdef OBJ_ELF |
| 151 | /* Whether to warn about non PC relative relocations that aren't |
| 152 | in the .got2 section. */ |
| 153 | static boolean mrelocatable = false; |
| 154 | #endif |
| 155 | |
| 156 | #ifdef OBJ_COFF |
| 157 | |
| 158 | /* The RS/6000 assembler uses the .csect pseudo-op to generate code |
| 159 | using a bunch of different sections. These assembler sections, |
| 160 | however, are all encompassed within the .text or .data sections of |
| 161 | the final output file. We handle this by using different |
| 162 | subsegments within these main segments. */ |
| 163 | |
| 164 | /* Next subsegment to allocate within the .text segment. */ |
| 165 | static subsegT ppc_text_subsegment = 2; |
| 166 | |
| 167 | /* Linked list of csects in the text section. */ |
| 168 | static symbolS *ppc_text_csects; |
| 169 | |
| 170 | /* Next subsegment to allocate within the .data segment. */ |
| 171 | static subsegT ppc_data_subsegment = 2; |
| 172 | |
| 173 | /* Linked list of csects in the data section. */ |
| 174 | static symbolS *ppc_data_csects; |
| 175 | |
| 176 | /* The current csect. */ |
| 177 | static symbolS *ppc_current_csect; |
| 178 | |
| 179 | /* The RS/6000 assembler uses a TOC which holds addresses of functions |
| 180 | and variables. Symbols are put in the TOC with the .tc pseudo-op. |
| 181 | A special relocation is used when accessing TOC entries. We handle |
| 182 | the TOC as a subsegment within the .data segment. We set it up if |
| 183 | we see a .toc pseudo-op, and save the csect symbol here. */ |
| 184 | static symbolS *ppc_toc_csect; |
| 185 | |
| 186 | /* The first frag in the TOC subsegment. */ |
| 187 | static fragS *ppc_toc_frag; |
| 188 | |
| 189 | /* The first frag in the first subsegment after the TOC in the .data |
| 190 | segment. NULL if there are no subsegments after the TOC. */ |
| 191 | static fragS *ppc_after_toc_frag; |
| 192 | |
| 193 | /* The current static block. */ |
| 194 | static symbolS *ppc_current_block; |
| 195 | |
| 196 | /* The COFF debugging section; set by md_begin. This is not the |
| 197 | .debug section, but is instead the secret BFD section which will |
| 198 | cause BFD to set the section number of a symbol to N_DEBUG. */ |
| 199 | static asection *ppc_coff_debug_section; |
| 200 | |
| 201 | /* The size of the .debug section. */ |
| 202 | static bfd_size_type ppc_debug_name_section_size; |
| 203 | |
| 204 | #endif /* OBJ_COFF */ |
| 205 | |
| 206 | #ifdef OBJ_ELF |
| 207 | symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE" */ |
| 208 | #endif /* OBJ_ELF */ |
| 209 | |
| 210 | #ifndef WORKING_DOT_WORD |
| 211 | const int md_short_jump_size = 4; |
| 212 | const int md_long_jump_size = 4; |
| 213 | #endif |
| 214 | \f |
| 215 | #ifdef OBJ_ELF |
| 216 | CONST char *md_shortopts = "um:VQ:"; |
| 217 | #else |
| 218 | CONST char *md_shortopts = "um:"; |
| 219 | #endif |
| 220 | struct option md_longopts[] = { |
| 221 | {NULL, no_argument, NULL, 0} |
| 222 | }; |
| 223 | size_t md_longopts_size = sizeof(md_longopts); |
| 224 | |
| 225 | int |
| 226 | md_parse_option (c, arg) |
| 227 | int c; |
| 228 | char *arg; |
| 229 | { |
| 230 | switch (c) |
| 231 | { |
| 232 | case 'u': |
| 233 | /* -u means that any undefined symbols should be treated as |
| 234 | external, which is the default for gas anyhow. */ |
| 235 | break; |
| 236 | |
| 237 | case 'm': |
| 238 | /* -mpwrx and -mpwr2 mean to assemble for the IBM POWER/2 |
| 239 | (RIOS2). */ |
| 240 | if (strcmp (arg, "pwrx") == 0 || strcmp (arg, "pwr2") == 0) |
| 241 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2; |
| 242 | /* -mpwr means to assemble for the IBM POWER (RIOS1). */ |
| 243 | else if (strcmp (arg, "pwr") == 0) |
| 244 | ppc_cpu = PPC_OPCODE_POWER; |
| 245 | /* -m601 means to assemble for the Motorola PowerPC 601. FIXME: We |
| 246 | ignore the option for now, but we should really use it to permit |
| 247 | instructions defined on the 601 that are not part of the standard |
| 248 | PowerPC architecture (mostly holdovers from the POWER). */ |
| 249 | else if (strcmp (arg, "601") == 0) |
| 250 | ppc_cpu = PPC_OPCODE_PPC | PPC_OPCODE_601; |
| 251 | /* -mppc, -mppc32, -m603, and -m604 mean to assemble for the |
| 252 | Motorola PowerPC 603/604. */ |
| 253 | else if (strcmp (arg, "ppc") == 0 |
| 254 | || strcmp (arg, "ppc32") == 0 |
| 255 | || strcmp (arg, "403") == 0 |
| 256 | || strcmp (arg, "603") == 0 |
| 257 | || strcmp (arg, "604") == 0) |
| 258 | ppc_cpu = PPC_OPCODE_PPC; |
| 259 | /* -mppc64 and -m620 mean to assemble for the 64-bit PowerPC |
| 260 | 620. */ |
| 261 | else if (strcmp (arg, "ppc64") == 0 || strcmp (arg, "620") == 0) |
| 262 | { |
| 263 | ppc_cpu = PPC_OPCODE_PPC; |
| 264 | ppc_size = PPC_OPCODE_64; |
| 265 | } |
| 266 | /* -many means to assemble for any architecture (PWR/PWRX/PPC). */ |
| 267 | else if (strcmp (arg, "any") == 0) |
| 268 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2 | PPC_OPCODE_PPC; |
| 269 | #ifdef OBJ_ELF |
| 270 | /* -mrelocatable -- warn about initializations that require relocation */ |
| 271 | else if (strcmp (arg, "relocatable") == 0) |
| 272 | mrelocatable = true; |
| 273 | #endif |
| 274 | else |
| 275 | { |
| 276 | as_bad ("invalid architecture -m%s", arg); |
| 277 | return 0; |
| 278 | } |
| 279 | break; |
| 280 | |
| 281 | #ifdef OBJ_ELF |
| 282 | /* -V: SVR4 argument to print version ID. */ |
| 283 | case 'V': |
| 284 | print_version_id (); |
| 285 | break; |
| 286 | |
| 287 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section |
| 288 | should be emitted or not. FIXME: Not implemented. */ |
| 289 | case 'Q': |
| 290 | break; |
| 291 | #endif |
| 292 | |
| 293 | default: |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | return 1; |
| 298 | } |
| 299 | |
| 300 | void |
| 301 | md_show_usage (stream) |
| 302 | FILE *stream; |
| 303 | { |
| 304 | fprintf(stream, "\ |
| 305 | PowerPC options:\n\ |
| 306 | -u ignored\n\ |
| 307 | -mpwrx generate code for IBM POWER/2 (RIOS2)\n\ |
| 308 | -mpwr generate code for IBM POWER (RIOS1)\n\ |
| 309 | -m601 generate code for Motorola PowerPC 601\n\ |
| 310 | -mppc, -mppc32, -m403, -m603, -m604\n\ |
| 311 | generate code for Motorola PowerPC 603/604\n\ |
| 312 | -many generate code for any architecture (PWR/PWRX/PPC)\n"); |
| 313 | #ifdef OBJ_ELF |
| 314 | fprintf(stream, "\ |
| 315 | -mrelocatable warn incompatible with GCC's -mrelocatble option\n\ |
| 316 | -V print assembler version number\n\ |
| 317 | -Qy, -Qn ignored\n"); |
| 318 | #endif |
| 319 | } |
| 320 | \f |
| 321 | /* Set ppc_cpu if it is not already set. */ |
| 322 | |
| 323 | static void |
| 324 | ppc_set_cpu () |
| 325 | { |
| 326 | const char *default_cpu = TARGET_CPU; |
| 327 | |
| 328 | if (ppc_cpu == 0) |
| 329 | { |
| 330 | if (strcmp (default_cpu, "rs6000") == 0) |
| 331 | ppc_cpu = PPC_OPCODE_POWER; |
| 332 | else if (strcmp (default_cpu, "powerpc") == 0) |
| 333 | ppc_cpu = PPC_OPCODE_PPC; |
| 334 | else |
| 335 | abort (); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | /* Figure out the BFD architecture to use. */ |
| 340 | |
| 341 | enum bfd_architecture |
| 342 | ppc_arch () |
| 343 | { |
| 344 | ppc_set_cpu (); |
| 345 | |
| 346 | if ((ppc_cpu & PPC_OPCODE_PPC) != 0) |
| 347 | return bfd_arch_powerpc; |
| 348 | else if ((ppc_cpu & PPC_OPCODE_POWER) != 0) |
| 349 | return bfd_arch_rs6000; |
| 350 | else |
| 351 | abort (); |
| 352 | } |
| 353 | |
| 354 | /* This function is called when the assembler starts up. It is called |
| 355 | after the options have been parsed and the output file has been |
| 356 | opened. */ |
| 357 | |
| 358 | void |
| 359 | md_begin () |
| 360 | { |
| 361 | register const struct powerpc_opcode *op; |
| 362 | const struct powerpc_opcode *op_end; |
| 363 | const struct powerpc_macro *macro; |
| 364 | const struct powerpc_macro *macro_end; |
| 365 | |
| 366 | ppc_set_cpu (); |
| 367 | |
| 368 | #ifdef OBJ_ELF |
| 369 | /* Set the -mrelocatable flag bit */ |
| 370 | if (mrelocatable) |
| 371 | bfd_set_private_flags (stdoutput, EF_PPC_RELOCATABLE); |
| 372 | #endif |
| 373 | |
| 374 | /* Insert the opcodes into a hash table. */ |
| 375 | ppc_hash = hash_new (); |
| 376 | |
| 377 | op_end = powerpc_opcodes + powerpc_num_opcodes; |
| 378 | for (op = powerpc_opcodes; op < op_end; op++) |
| 379 | { |
| 380 | know ((op->opcode & op->mask) == op->opcode); |
| 381 | |
| 382 | if ((op->flags & ppc_cpu) != 0 |
| 383 | && ((op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == 0 |
| 384 | || (op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == ppc_size)) |
| 385 | { |
| 386 | const char *retval; |
| 387 | |
| 388 | retval = hash_insert (ppc_hash, op->name, (PTR) op); |
| 389 | if (retval != (const char *) NULL) |
| 390 | { |
| 391 | /* We permit a duplication of the mfdec instruction on |
| 392 | the 601, because it seems to have one value on the |
| 393 | 601 and a different value on other PowerPC |
| 394 | processors. It's easier to permit a duplication than |
| 395 | to define a new instruction type flag. When using |
| 396 | -many, the comparison instructions are a harmless |
| 397 | special case. */ |
| 398 | if (strcmp (retval, "exists") != 0 |
| 399 | || (((ppc_cpu & PPC_OPCODE_601) == 0 |
| 400 | || strcmp (op->name, "mfdec") != 0) |
| 401 | && (ppc_cpu != (PPC_OPCODE_POWER |
| 402 | | PPC_OPCODE_POWER2 |
| 403 | | PPC_OPCODE_PPC) |
| 404 | || (strcmp (op->name, "cmpli") != 0 |
| 405 | && strcmp (op->name, "cmpi") != 0 |
| 406 | && strcmp (op->name, "cmp") != 0 |
| 407 | && strcmp (op->name, "cmpl") != 0)))) |
| 408 | abort (); |
| 409 | } |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | /* Insert the macros into a hash table. */ |
| 414 | ppc_macro_hash = hash_new (); |
| 415 | |
| 416 | macro_end = powerpc_macros + powerpc_num_macros; |
| 417 | for (macro = powerpc_macros; macro < macro_end; macro++) |
| 418 | { |
| 419 | if ((macro->flags & ppc_cpu) != 0) |
| 420 | { |
| 421 | const char *retval; |
| 422 | |
| 423 | retval = hash_insert (ppc_macro_hash, macro->name, (PTR) macro); |
| 424 | if (retval != (const char *) NULL) |
| 425 | abort (); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | /* Tell the main code what the endianness is. */ |
| 430 | target_big_endian = ppc_big_endian; |
| 431 | |
| 432 | #ifdef OBJ_COFF |
| 433 | ppc_coff_debug_section = coff_section_from_bfd_index (stdoutput, N_DEBUG); |
| 434 | |
| 435 | /* Create dummy symbols to serve as initial csects. This forces the |
| 436 | text csects to precede the data csects. These symbols will not |
| 437 | be output. */ |
| 438 | ppc_text_csects = symbol_make ("dummy\001"); |
| 439 | ppc_text_csects->sy_tc.within = ppc_text_csects; |
| 440 | ppc_data_csects = symbol_make ("dummy\001"); |
| 441 | ppc_data_csects->sy_tc.within = ppc_data_csects; |
| 442 | #endif |
| 443 | } |
| 444 | |
| 445 | /* Insert an operand value into an instruction. */ |
| 446 | |
| 447 | static unsigned long |
| 448 | ppc_insert_operand (insn, operand, val, file, line) |
| 449 | unsigned long insn; |
| 450 | const struct powerpc_operand *operand; |
| 451 | offsetT val; |
| 452 | char *file; |
| 453 | unsigned int line; |
| 454 | { |
| 455 | if (operand->bits != 32) |
| 456 | { |
| 457 | long min, max; |
| 458 | offsetT test; |
| 459 | |
| 460 | if ((operand->flags & PPC_OPERAND_SIGNED) != 0) |
| 461 | { |
| 462 | if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0 |
| 463 | && ppc_size == PPC_OPCODE_32) |
| 464 | max = (1 << operand->bits) - 1; |
| 465 | else |
| 466 | max = (1 << (operand->bits - 1)) - 1; |
| 467 | min = - (1 << (operand->bits - 1)); |
| 468 | } |
| 469 | else |
| 470 | { |
| 471 | max = (1 << operand->bits) - 1; |
| 472 | min = 0; |
| 473 | } |
| 474 | |
| 475 | if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0) |
| 476 | test = - val; |
| 477 | else |
| 478 | test = val; |
| 479 | |
| 480 | if (test < (offsetT) min || test > (offsetT) max) |
| 481 | { |
| 482 | const char *err = |
| 483 | "operand out of range (%s not between %ld and %ld)"; |
| 484 | char buf[100]; |
| 485 | |
| 486 | sprint_value (buf, test); |
| 487 | if (file == (char *) NULL) |
| 488 | as_warn (err, buf, min, max); |
| 489 | else |
| 490 | as_warn_where (file, line, err, buf, min, max); |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | if (operand->insert) |
| 495 | { |
| 496 | const char *errmsg; |
| 497 | |
| 498 | errmsg = NULL; |
| 499 | insn = (*operand->insert) (insn, (long) val, &errmsg); |
| 500 | if (errmsg != (const char *) NULL) |
| 501 | as_warn (errmsg); |
| 502 | } |
| 503 | else |
| 504 | insn |= (((long) val & ((1 << operand->bits) - 1)) |
| 505 | << operand->shift); |
| 506 | |
| 507 | return insn; |
| 508 | } |
| 509 | |
| 510 | #ifdef OBJ_ELF |
| 511 | /* Parse @got, etc. and return the desired relocation. */ |
| 512 | static bfd_reloc_code_real_type |
| 513 | ppc_elf_suffix (str_p) |
| 514 | char **str_p; |
| 515 | { |
| 516 | char *str = *str_p; |
| 517 | |
| 518 | if (*str != '@') |
| 519 | return BFD_RELOC_UNUSED; |
| 520 | |
| 521 | if (strncmp (str, "@GOT", 4) == 0 || strncmp (str, "@got", 4) == 0) |
| 522 | { |
| 523 | *str_p += 4; |
| 524 | return BFD_RELOC_PPC_TOC16; |
| 525 | } |
| 526 | else if (strncmp (str, "@L", 2) == 0 || strncmp (str, "@l", 2) == 0) |
| 527 | { |
| 528 | *str_p += 2; |
| 529 | return BFD_RELOC_LO16; |
| 530 | } |
| 531 | else if (strncmp (str, "@HA", 3) == 0 || strncmp (str, "@ha", 3) == 0) |
| 532 | { |
| 533 | *str_p += 3; |
| 534 | return BFD_RELOC_HI16_S; |
| 535 | } |
| 536 | else if (strncmp (str, "@H", 2) == 0 || strncmp (str, "@h", 2) == 0) |
| 537 | { |
| 538 | *str_p += 2; |
| 539 | return BFD_RELOC_HI16; |
| 540 | } |
| 541 | |
| 542 | return BFD_RELOC_UNUSED; |
| 543 | } |
| 544 | |
| 545 | /* Like normal .long/.short/.word, except support @got, etc. */ |
| 546 | /* clobbers input_line_pointer, checks */ |
| 547 | /* end-of-line. */ |
| 548 | static void |
| 549 | ppc_elf_cons (nbytes) |
| 550 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
| 551 | { |
| 552 | expressionS exp; |
| 553 | bfd_reloc_code_real_type reloc; |
| 554 | |
| 555 | if (is_it_end_of_statement ()) |
| 556 | { |
| 557 | demand_empty_rest_of_line (); |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | do |
| 562 | { |
| 563 | expression (&exp); |
| 564 | if (nbytes == 4 |
| 565 | && exp.X_op == O_symbol |
| 566 | && *input_line_pointer == '@' |
| 567 | && (reloc = ppc_elf_suffix (&input_line_pointer)) != BFD_RELOC_UNUSED) |
| 568 | { |
| 569 | register char *p = frag_more ((int) nbytes); |
| 570 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, reloc); |
| 571 | int offset = (!reloc_howto) ? 0 : (nbytes - bfd_get_reloc_size (reloc_howto)); |
| 572 | |
| 573 | if (offset < 0) |
| 574 | offset = 0; |
| 575 | |
| 576 | fix_new_exp (frag_now, p - frag_now->fr_literal + offset, (int) nbytes - offset, &exp, 0, reloc); |
| 577 | } |
| 578 | else |
| 579 | emit_expr (&exp, (unsigned int) nbytes); |
| 580 | } |
| 581 | while (*input_line_pointer++ == ','); |
| 582 | |
| 583 | input_line_pointer--; /* Put terminator back into stream. */ |
| 584 | demand_empty_rest_of_line (); |
| 585 | } |
| 586 | |
| 587 | /* Validate any relocations emitted for -mrelocatable */ |
| 588 | static void |
| 589 | ppc_elf_validate_fix (fixS *fixp, segT seg) |
| 590 | { |
| 591 | if (mrelocatable |
| 592 | && !fixp->fx_done |
| 593 | && !fixp->fx_pcrel |
| 594 | && fixp->fx_r_type <= BFD_RELOC_UNUSED |
| 595 | && strcmp (segment_name (seg), ".got2") != 0 |
| 596 | && strcmp (segment_name (seg), ".dtors") != 0 |
| 597 | && strcmp (segment_name (seg), ".ctors") != 0 |
| 598 | && strcmp (segment_name (seg), ".stab") != 0) |
| 599 | { |
| 600 | as_warn_where (fixp->fx_file, fixp->fx_line, |
| 601 | "Relocation cannot be done when using -mrelocatable"); |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | #endif /* OBJ_ELF */ |
| 606 | |
| 607 | /* We need to keep a list of fixups. We can't simply generate them as |
| 608 | we go, because that would require us to first create the frag, and |
| 609 | that would screw up references to ``.''. */ |
| 610 | |
| 611 | struct ppc_fixup |
| 612 | { |
| 613 | expressionS exp; |
| 614 | int opindex; |
| 615 | bfd_reloc_code_real_type reloc; |
| 616 | }; |
| 617 | |
| 618 | #define MAX_INSN_FIXUPS (5) |
| 619 | |
| 620 | /* This routine is called for each instruction to be assembled. */ |
| 621 | |
| 622 | void |
| 623 | md_assemble (str) |
| 624 | char *str; |
| 625 | { |
| 626 | char *s; |
| 627 | const struct powerpc_opcode *opcode; |
| 628 | unsigned long insn; |
| 629 | const unsigned char *opindex_ptr; |
| 630 | int skip_optional; |
| 631 | int need_paren; |
| 632 | int next_opindex; |
| 633 | struct ppc_fixup fixups[MAX_INSN_FIXUPS]; |
| 634 | int fc; |
| 635 | char *f; |
| 636 | int i; |
| 637 | bfd_reloc_code_real_type reloc; |
| 638 | |
| 639 | /* Get the opcode. */ |
| 640 | for (s = str; *s != '\0' && ! isspace (*s); s++) |
| 641 | ; |
| 642 | if (*s != '\0') |
| 643 | *s++ = '\0'; |
| 644 | |
| 645 | /* Look up the opcode in the hash table. */ |
| 646 | opcode = (const struct powerpc_opcode *) hash_find (ppc_hash, str); |
| 647 | if (opcode == (const struct powerpc_opcode *) NULL) |
| 648 | { |
| 649 | const struct powerpc_macro *macro; |
| 650 | |
| 651 | macro = (const struct powerpc_macro *) hash_find (ppc_macro_hash, str); |
| 652 | if (macro == (const struct powerpc_macro *) NULL) |
| 653 | as_bad ("Unrecognized opcode: `%s'", str); |
| 654 | else |
| 655 | ppc_macro (s, macro); |
| 656 | |
| 657 | return; |
| 658 | } |
| 659 | |
| 660 | insn = opcode->opcode; |
| 661 | |
| 662 | str = s; |
| 663 | while (isspace (*str)) |
| 664 | ++str; |
| 665 | |
| 666 | /* PowerPC operands are just expressions. The only real issue is |
| 667 | that a few operand types are optional. All cases which might use |
| 668 | an optional operand separate the operands only with commas (in |
| 669 | some cases parentheses are used, as in ``lwz 1,0(1)'' but such |
| 670 | cases never have optional operands). There is never more than |
| 671 | one optional operand for an instruction. So, before we start |
| 672 | seriously parsing the operands, we check to see if we have an |
| 673 | optional operand, and, if we do, we count the number of commas to |
| 674 | see whether the operand should be omitted. */ |
| 675 | skip_optional = 0; |
| 676 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
| 677 | { |
| 678 | const struct powerpc_operand *operand; |
| 679 | |
| 680 | operand = &powerpc_operands[*opindex_ptr]; |
| 681 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0) |
| 682 | { |
| 683 | unsigned int opcount; |
| 684 | |
| 685 | /* There is an optional operand. Count the number of |
| 686 | commas in the input line. */ |
| 687 | if (*str == '\0') |
| 688 | opcount = 0; |
| 689 | else |
| 690 | { |
| 691 | opcount = 1; |
| 692 | s = str; |
| 693 | while ((s = strchr (s, ',')) != (char *) NULL) |
| 694 | { |
| 695 | ++opcount; |
| 696 | ++s; |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | /* If there are fewer operands in the line then are called |
| 701 | for by the instruction, we want to skip the optional |
| 702 | operand. */ |
| 703 | if (opcount < strlen (opcode->operands)) |
| 704 | skip_optional = 1; |
| 705 | |
| 706 | break; |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | /* Gather the operands. */ |
| 711 | need_paren = 0; |
| 712 | next_opindex = 0; |
| 713 | fc = 0; |
| 714 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
| 715 | { |
| 716 | const struct powerpc_operand *operand; |
| 717 | const char *errmsg; |
| 718 | char *hold; |
| 719 | expressionS ex; |
| 720 | char endc; |
| 721 | |
| 722 | if (next_opindex == 0) |
| 723 | operand = &powerpc_operands[*opindex_ptr]; |
| 724 | else |
| 725 | { |
| 726 | operand = &powerpc_operands[next_opindex]; |
| 727 | next_opindex = 0; |
| 728 | } |
| 729 | |
| 730 | errmsg = NULL; |
| 731 | |
| 732 | /* If this is a fake operand, then we do not expect anything |
| 733 | from the input. */ |
| 734 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) |
| 735 | { |
| 736 | insn = (*operand->insert) (insn, 0L, &errmsg); |
| 737 | if (errmsg != (const char *) NULL) |
| 738 | as_warn (errmsg); |
| 739 | continue; |
| 740 | } |
| 741 | |
| 742 | /* If this is an optional operand, and we are skipping it, just |
| 743 | insert a zero. */ |
| 744 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 |
| 745 | && skip_optional) |
| 746 | { |
| 747 | if (operand->insert) |
| 748 | { |
| 749 | insn = (*operand->insert) (insn, 0L, &errmsg); |
| 750 | if (errmsg != (const char *) NULL) |
| 751 | as_warn (errmsg); |
| 752 | } |
| 753 | if ((operand->flags & PPC_OPERAND_NEXT) != 0) |
| 754 | next_opindex = *opindex_ptr + 1; |
| 755 | continue; |
| 756 | } |
| 757 | |
| 758 | /* Gather the operand. */ |
| 759 | hold = input_line_pointer; |
| 760 | input_line_pointer = str; |
| 761 | expression (&ex); |
| 762 | str = input_line_pointer; |
| 763 | input_line_pointer = hold; |
| 764 | |
| 765 | if (ex.X_op == O_illegal) |
| 766 | as_bad ("illegal operand"); |
| 767 | else if (ex.X_op == O_absent) |
| 768 | as_bad ("missing operand"); |
| 769 | else if (ex.X_op == O_constant) |
| 770 | insn = ppc_insert_operand (insn, operand, ex.X_add_number, |
| 771 | (char *) NULL, 0); |
| 772 | |
| 773 | #ifdef OBJ_ELF |
| 774 | else if ((reloc = ppc_elf_suffix (&str)) != BFD_RELOC_UNUSED) |
| 775 | { |
| 776 | /* We need to generate a fixup for this expression. */ |
| 777 | if (fc >= MAX_INSN_FIXUPS) |
| 778 | as_fatal ("too many fixups"); |
| 779 | fixups[fc].exp = ex; |
| 780 | fixups[fc].opindex = 0; |
| 781 | fixups[fc].reloc = reloc; |
| 782 | ++fc; |
| 783 | } |
| 784 | #endif /* OBJ_ELF */ |
| 785 | |
| 786 | else |
| 787 | { |
| 788 | /* We need to generate a fixup for this expression. */ |
| 789 | if (fc >= MAX_INSN_FIXUPS) |
| 790 | as_fatal ("too many fixups"); |
| 791 | fixups[fc].exp = ex; |
| 792 | fixups[fc].opindex = *opindex_ptr; |
| 793 | fixups[fc].reloc = BFD_RELOC_UNUSED; |
| 794 | ++fc; |
| 795 | } |
| 796 | |
| 797 | if (need_paren) |
| 798 | { |
| 799 | endc = ')'; |
| 800 | need_paren = 0; |
| 801 | } |
| 802 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0) |
| 803 | { |
| 804 | endc = '('; |
| 805 | need_paren = 1; |
| 806 | } |
| 807 | else |
| 808 | endc = ','; |
| 809 | |
| 810 | /* The call to expression should have advanced str past any |
| 811 | whitespace. */ |
| 812 | if (*str != endc |
| 813 | && (endc != ',' || *str != '\0')) |
| 814 | { |
| 815 | as_bad ("syntax error; found `%c' but expected `%c'", *str, endc); |
| 816 | break; |
| 817 | } |
| 818 | |
| 819 | if (*str != '\0') |
| 820 | ++str; |
| 821 | } |
| 822 | |
| 823 | while (isspace (*str)) |
| 824 | ++str; |
| 825 | |
| 826 | if (*str != '\0') |
| 827 | as_bad ("junk at end of line: `%s'", str); |
| 828 | |
| 829 | /* Write out the instruction. */ |
| 830 | f = frag_more (4); |
| 831 | md_number_to_chars (f, insn, 4); |
| 832 | |
| 833 | /* Create any fixups. At this point we do not use a |
| 834 | bfd_reloc_code_real_type, but instead just use the operand index. |
| 835 | This lets us easily handle fixups for any operand type, although |
| 836 | that is admittedly not a very exciting feature. We pick a BFD |
| 837 | reloc type in md_apply_fix. */ |
| 838 | for (i = 0; i < fc; i++) |
| 839 | { |
| 840 | const struct powerpc_operand *operand; |
| 841 | |
| 842 | operand = &powerpc_operands[fixups[i].opindex]; |
| 843 | if (fixups[i].reloc != BFD_RELOC_UNUSED) |
| 844 | { |
| 845 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); |
| 846 | int offset = (!reloc_howto) ? 0 : (4 - bfd_get_reloc_size (reloc_howto)); |
| 847 | |
| 848 | if (offset < 0) |
| 849 | offset = 0; |
| 850 | |
| 851 | fix_new_exp (frag_now, f - frag_now->fr_literal + offset, 4 - offset, |
| 852 | &fixups[i].exp, (reloc_howto && reloc_howto->pc_relative), |
| 853 | fixups[i].reloc); |
| 854 | } |
| 855 | else |
| 856 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, |
| 857 | &fixups[i].exp, |
| 858 | (operand->flags & PPC_OPERAND_RELATIVE) != 0, |
| 859 | ((bfd_reloc_code_real_type) |
| 860 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); |
| 861 | } |
| 862 | } |
| 863 | |
| 864 | #ifndef WORKING_DOT_WORD |
| 865 | /* Handle long and short jumps */ |
| 866 | void |
| 867 | md_create_short_jump (ptr, from_addr, to_addr, frag, to_symbol) |
| 868 | char *ptr; |
| 869 | addressT from_addr, to_addr; |
| 870 | fragS *frag; |
| 871 | symbolS *to_symbol; |
| 872 | { |
| 873 | abort (); |
| 874 | } |
| 875 | |
| 876 | void |
| 877 | md_create_long_jump (ptr, from_addr, to_addr, frag, to_symbol) |
| 878 | char *ptr; |
| 879 | addressT from_addr, to_addr; |
| 880 | fragS *frag; |
| 881 | symbolS *to_symbol; |
| 882 | { |
| 883 | abort (); |
| 884 | } |
| 885 | #endif |
| 886 | |
| 887 | /* Handle a macro. Gather all the operands, transform them as |
| 888 | described by the macro, and call md_assemble recursively. All the |
| 889 | operands are separated by commas; we don't accept parentheses |
| 890 | around operands here. */ |
| 891 | |
| 892 | static void |
| 893 | ppc_macro (str, macro) |
| 894 | char *str; |
| 895 | const struct powerpc_macro *macro; |
| 896 | { |
| 897 | char *operands[10]; |
| 898 | int count; |
| 899 | char *s; |
| 900 | unsigned int len; |
| 901 | const char *format; |
| 902 | int arg; |
| 903 | char *send; |
| 904 | char *complete; |
| 905 | |
| 906 | /* Gather the users operands into the operands array. */ |
| 907 | count = 0; |
| 908 | s = str; |
| 909 | while (1) |
| 910 | { |
| 911 | if (count >= sizeof operands / sizeof operands[0]) |
| 912 | break; |
| 913 | operands[count++] = s; |
| 914 | s = strchr (s, ','); |
| 915 | if (s == (char *) NULL) |
| 916 | break; |
| 917 | *s++ = '\0'; |
| 918 | } |
| 919 | |
| 920 | if (count != macro->operands) |
| 921 | { |
| 922 | as_bad ("wrong number of operands"); |
| 923 | return; |
| 924 | } |
| 925 | |
| 926 | /* Work out how large the string must be (the size is unbounded |
| 927 | because it includes user input). */ |
| 928 | len = 0; |
| 929 | format = macro->format; |
| 930 | while (*format != '\0') |
| 931 | { |
| 932 | if (*format != '%') |
| 933 | { |
| 934 | ++len; |
| 935 | ++format; |
| 936 | } |
| 937 | else |
| 938 | { |
| 939 | arg = strtol (format + 1, &send, 10); |
| 940 | know (send != format && arg >= 0 && arg < count); |
| 941 | len += strlen (operands[arg]); |
| 942 | format = send; |
| 943 | } |
| 944 | } |
| 945 | |
| 946 | /* Put the string together. */ |
| 947 | complete = s = (char *) alloca (len + 1); |
| 948 | format = macro->format; |
| 949 | while (*format != '\0') |
| 950 | { |
| 951 | if (*format != '%') |
| 952 | *s++ = *format++; |
| 953 | else |
| 954 | { |
| 955 | arg = strtol (format + 1, &send, 10); |
| 956 | strcpy (s, operands[arg]); |
| 957 | s += strlen (s); |
| 958 | format = send; |
| 959 | } |
| 960 | } |
| 961 | *s = '\0'; |
| 962 | |
| 963 | /* Assemble the constructed instruction. */ |
| 964 | md_assemble (complete); |
| 965 | } |
| 966 | \f |
| 967 | /* Pseudo-op handling. */ |
| 968 | |
| 969 | /* The .byte pseudo-op. This is similar to the normal .byte |
| 970 | pseudo-op, but it can also take a single ASCII string. */ |
| 971 | |
| 972 | static void |
| 973 | ppc_byte (ignore) |
| 974 | int ignore; |
| 975 | { |
| 976 | if (*input_line_pointer != '\"') |
| 977 | { |
| 978 | cons (1); |
| 979 | return; |
| 980 | } |
| 981 | |
| 982 | /* Gather characters. A real double quote is doubled. Unusual |
| 983 | characters are not permitted. */ |
| 984 | ++input_line_pointer; |
| 985 | while (1) |
| 986 | { |
| 987 | char c; |
| 988 | |
| 989 | c = *input_line_pointer++; |
| 990 | |
| 991 | if (c == '\"') |
| 992 | { |
| 993 | if (*input_line_pointer != '\"') |
| 994 | break; |
| 995 | ++input_line_pointer; |
| 996 | } |
| 997 | |
| 998 | FRAG_APPEND_1_CHAR (c); |
| 999 | } |
| 1000 | |
| 1001 | demand_empty_rest_of_line (); |
| 1002 | } |
| 1003 | \f |
| 1004 | #ifdef OBJ_COFF |
| 1005 | |
| 1006 | /* XCOFF specific pseudo-op handling. */ |
| 1007 | |
| 1008 | /* The .comm and .lcomm pseudo-ops for XCOFF. XCOFF puts common |
| 1009 | symbols in the .bss segment as though they were local common |
| 1010 | symbols, and uses a different smclas. */ |
| 1011 | |
| 1012 | static void |
| 1013 | ppc_comm (lcomm) |
| 1014 | int lcomm; |
| 1015 | { |
| 1016 | asection *current_seg = now_seg; |
| 1017 | subsegT current_subseg = now_subseg; |
| 1018 | char *name; |
| 1019 | char endc; |
| 1020 | char *end_name; |
| 1021 | offsetT size; |
| 1022 | offsetT align; |
| 1023 | symbolS *lcomm_sym = NULL; |
| 1024 | symbolS *sym; |
| 1025 | char *pfrag; |
| 1026 | |
| 1027 | name = input_line_pointer; |
| 1028 | endc = get_symbol_end (); |
| 1029 | end_name = input_line_pointer; |
| 1030 | *end_name = endc; |
| 1031 | |
| 1032 | if (*input_line_pointer != ',') |
| 1033 | { |
| 1034 | as_bad ("missing size"); |
| 1035 | ignore_rest_of_line (); |
| 1036 | return; |
| 1037 | } |
| 1038 | ++input_line_pointer; |
| 1039 | |
| 1040 | size = get_absolute_expression (); |
| 1041 | if (size < 0) |
| 1042 | { |
| 1043 | as_bad ("negative size"); |
| 1044 | ignore_rest_of_line (); |
| 1045 | return; |
| 1046 | } |
| 1047 | |
| 1048 | if (! lcomm) |
| 1049 | { |
| 1050 | /* The third argument to .comm is the alignment. */ |
| 1051 | if (*input_line_pointer != ',') |
| 1052 | align = 3; |
| 1053 | else |
| 1054 | { |
| 1055 | ++input_line_pointer; |
| 1056 | align = get_absolute_expression (); |
| 1057 | if (align <= 0) |
| 1058 | { |
| 1059 | as_warn ("ignoring bad alignment"); |
| 1060 | align = 3; |
| 1061 | } |
| 1062 | } |
| 1063 | } |
| 1064 | else |
| 1065 | { |
| 1066 | char *lcomm_name; |
| 1067 | char lcomm_endc; |
| 1068 | |
| 1069 | if (size <= 1) |
| 1070 | align = 0; |
| 1071 | else if (size <= 2) |
| 1072 | align = 1; |
| 1073 | else if (size <= 4) |
| 1074 | align = 2; |
| 1075 | else |
| 1076 | align = 3; |
| 1077 | |
| 1078 | /* The third argument to .lcomm appears to be the real local |
| 1079 | common symbol to create. References to the symbol named in |
| 1080 | the first argument are turned into references to the third |
| 1081 | argument. */ |
| 1082 | if (*input_line_pointer != ',') |
| 1083 | { |
| 1084 | as_bad ("missing real symbol name"); |
| 1085 | ignore_rest_of_line (); |
| 1086 | return; |
| 1087 | } |
| 1088 | ++input_line_pointer; |
| 1089 | |
| 1090 | lcomm_name = input_line_pointer; |
| 1091 | lcomm_endc = get_symbol_end (); |
| 1092 | |
| 1093 | lcomm_sym = symbol_find_or_make (lcomm_name); |
| 1094 | |
| 1095 | *input_line_pointer = lcomm_endc; |
| 1096 | } |
| 1097 | |
| 1098 | *end_name = '\0'; |
| 1099 | sym = symbol_find_or_make (name); |
| 1100 | *end_name = endc; |
| 1101 | |
| 1102 | if (S_IS_DEFINED (sym) |
| 1103 | || S_GET_VALUE (sym) != 0) |
| 1104 | { |
| 1105 | as_bad ("attempt to redefine symbol"); |
| 1106 | ignore_rest_of_line (); |
| 1107 | return; |
| 1108 | } |
| 1109 | |
| 1110 | record_alignment (bss_section, align); |
| 1111 | |
| 1112 | if (! lcomm |
| 1113 | || ! S_IS_DEFINED (lcomm_sym)) |
| 1114 | { |
| 1115 | symbolS *def_sym; |
| 1116 | offsetT def_size; |
| 1117 | |
| 1118 | if (! lcomm) |
| 1119 | { |
| 1120 | def_sym = sym; |
| 1121 | def_size = size; |
| 1122 | S_SET_EXTERNAL (sym); |
| 1123 | } |
| 1124 | else |
| 1125 | { |
| 1126 | lcomm_sym->sy_tc.output = 1; |
| 1127 | def_sym = lcomm_sym; |
| 1128 | def_size = 0; |
| 1129 | } |
| 1130 | |
| 1131 | subseg_set (bss_section, 1); |
| 1132 | frag_align (align, 0); |
| 1133 | |
| 1134 | def_sym->sy_frag = frag_now; |
| 1135 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, def_sym, |
| 1136 | def_size, (char *) NULL); |
| 1137 | *pfrag = 0; |
| 1138 | S_SET_SEGMENT (def_sym, bss_section); |
| 1139 | def_sym->sy_tc.align = align; |
| 1140 | } |
| 1141 | else if (lcomm) |
| 1142 | { |
| 1143 | /* Align the size of lcomm_sym. */ |
| 1144 | lcomm_sym->sy_frag->fr_offset = |
| 1145 | ((lcomm_sym->sy_frag->fr_offset + (1 << align) - 1) |
| 1146 | &~ ((1 << align) - 1)); |
| 1147 | if (align > lcomm_sym->sy_tc.align) |
| 1148 | lcomm_sym->sy_tc.align = align; |
| 1149 | } |
| 1150 | |
| 1151 | if (lcomm) |
| 1152 | { |
| 1153 | /* Make sym an offset from lcomm_sym. */ |
| 1154 | S_SET_SEGMENT (sym, bss_section); |
| 1155 | sym->sy_frag = lcomm_sym->sy_frag; |
| 1156 | S_SET_VALUE (sym, lcomm_sym->sy_frag->fr_offset); |
| 1157 | lcomm_sym->sy_frag->fr_offset += size; |
| 1158 | } |
| 1159 | |
| 1160 | subseg_set (current_seg, current_subseg); |
| 1161 | |
| 1162 | demand_empty_rest_of_line (); |
| 1163 | } |
| 1164 | |
| 1165 | /* The .csect pseudo-op. This switches us into a different |
| 1166 | subsegment. The first argument is a symbol whose value is the |
| 1167 | start of the .csect. In COFF, csect symbols get special aux |
| 1168 | entries defined by the x_csect field of union internal_auxent. The |
| 1169 | optional second argument is the alignment (the default is 2). */ |
| 1170 | |
| 1171 | static void |
| 1172 | ppc_csect (ignore) |
| 1173 | int ignore; |
| 1174 | { |
| 1175 | char *name; |
| 1176 | char endc; |
| 1177 | symbolS *sym; |
| 1178 | |
| 1179 | name = input_line_pointer; |
| 1180 | endc = get_symbol_end (); |
| 1181 | |
| 1182 | sym = symbol_find_or_make (name); |
| 1183 | |
| 1184 | *input_line_pointer = endc; |
| 1185 | |
| 1186 | if (S_IS_DEFINED (sym)) |
| 1187 | subseg_set (S_GET_SEGMENT (sym), sym->sy_tc.subseg); |
| 1188 | else |
| 1189 | { |
| 1190 | symbolS **list_ptr; |
| 1191 | int after_toc; |
| 1192 | symbolS *list; |
| 1193 | |
| 1194 | /* This is a new csect. We need to look at the symbol class to |
| 1195 | figure out whether it should go in the text section or the |
| 1196 | data section. */ |
| 1197 | after_toc = 0; |
| 1198 | switch (sym->sy_tc.class) |
| 1199 | { |
| 1200 | case XMC_PR: |
| 1201 | case XMC_RO: |
| 1202 | case XMC_DB: |
| 1203 | case XMC_GL: |
| 1204 | case XMC_XO: |
| 1205 | case XMC_SV: |
| 1206 | case XMC_TI: |
| 1207 | case XMC_TB: |
| 1208 | S_SET_SEGMENT (sym, text_section); |
| 1209 | sym->sy_tc.subseg = ppc_text_subsegment; |
| 1210 | ++ppc_text_subsegment; |
| 1211 | list_ptr = &ppc_text_csects; |
| 1212 | break; |
| 1213 | case XMC_RW: |
| 1214 | case XMC_TC0: |
| 1215 | case XMC_TC: |
| 1216 | case XMC_DS: |
| 1217 | case XMC_UA: |
| 1218 | case XMC_BS: |
| 1219 | case XMC_UC: |
| 1220 | if (ppc_toc_csect->sy_tc.subseg + 1 == ppc_data_subsegment) |
| 1221 | after_toc = 1; |
| 1222 | S_SET_SEGMENT (sym, data_section); |
| 1223 | sym->sy_tc.subseg = ppc_data_subsegment; |
| 1224 | ++ppc_data_subsegment; |
| 1225 | list_ptr = &ppc_data_csects; |
| 1226 | break; |
| 1227 | default: |
| 1228 | abort (); |
| 1229 | } |
| 1230 | |
| 1231 | subseg_new (segment_name (S_GET_SEGMENT (sym)), sym->sy_tc.subseg); |
| 1232 | if (after_toc) |
| 1233 | ppc_after_toc_frag = frag_now; |
| 1234 | |
| 1235 | sym->sy_frag = frag_now; |
| 1236 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); |
| 1237 | |
| 1238 | sym->sy_tc.align = 2; |
| 1239 | sym->sy_tc.output = 1; |
| 1240 | sym->sy_tc.within = sym; |
| 1241 | |
| 1242 | for (list = *list_ptr; |
| 1243 | list->sy_tc.next != (symbolS *) NULL; |
| 1244 | list = list->sy_tc.next) |
| 1245 | ; |
| 1246 | list->sy_tc.next = sym; |
| 1247 | |
| 1248 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); |
| 1249 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); |
| 1250 | } |
| 1251 | |
| 1252 | if (*input_line_pointer == ',') |
| 1253 | { |
| 1254 | ++input_line_pointer; |
| 1255 | sym->sy_tc.align = get_absolute_expression (); |
| 1256 | } |
| 1257 | |
| 1258 | ppc_current_csect = sym; |
| 1259 | |
| 1260 | demand_empty_rest_of_line (); |
| 1261 | } |
| 1262 | |
| 1263 | /* The .extern pseudo-op. We create an undefined symbol. */ |
| 1264 | |
| 1265 | static void |
| 1266 | ppc_extern (ignore) |
| 1267 | int ignore; |
| 1268 | { |
| 1269 | char *name; |
| 1270 | char endc; |
| 1271 | |
| 1272 | name = input_line_pointer; |
| 1273 | endc = get_symbol_end (); |
| 1274 | |
| 1275 | (void) symbol_find_or_make (name); |
| 1276 | |
| 1277 | *input_line_pointer = endc; |
| 1278 | |
| 1279 | demand_empty_rest_of_line (); |
| 1280 | } |
| 1281 | |
| 1282 | /* The .lglobl pseudo-op. I think the RS/6000 assembler only needs |
| 1283 | this because it can't handle undefined symbols. I think we can |
| 1284 | just ignore it. */ |
| 1285 | |
| 1286 | static void |
| 1287 | ppc_lglobl (ignore) |
| 1288 | int ignore; |
| 1289 | { |
| 1290 | s_ignore (0); |
| 1291 | } |
| 1292 | |
| 1293 | /* The .rename pseudo-op. The RS/6000 assembler can rename symbols, |
| 1294 | although I don't know why it bothers. */ |
| 1295 | |
| 1296 | static void |
| 1297 | ppc_rename (ignore) |
| 1298 | int ignore; |
| 1299 | { |
| 1300 | char *name; |
| 1301 | char endc; |
| 1302 | symbolS *sym; |
| 1303 | int len; |
| 1304 | |
| 1305 | name = input_line_pointer; |
| 1306 | endc = get_symbol_end (); |
| 1307 | |
| 1308 | sym = symbol_find_or_make (name); |
| 1309 | |
| 1310 | *input_line_pointer = endc; |
| 1311 | |
| 1312 | if (*input_line_pointer != ',') |
| 1313 | { |
| 1314 | as_bad ("missing rename string"); |
| 1315 | ignore_rest_of_line (); |
| 1316 | return; |
| 1317 | } |
| 1318 | ++input_line_pointer; |
| 1319 | |
| 1320 | sym->sy_tc.real_name = demand_copy_C_string (&len); |
| 1321 | |
| 1322 | demand_empty_rest_of_line (); |
| 1323 | } |
| 1324 | |
| 1325 | /* The .stabx pseudo-op. This is similar to a normal .stabs |
| 1326 | pseudo-op, but slightly different. A sample is |
| 1327 | .stabx "main:F-1",.main,142,0 |
| 1328 | The first argument is the symbol name to create. The second is the |
| 1329 | value, and the third is the storage class. The fourth seems to be |
| 1330 | always zero, and I am assuming it is the type. */ |
| 1331 | |
| 1332 | static void |
| 1333 | ppc_stabx (ignore) |
| 1334 | int ignore; |
| 1335 | { |
| 1336 | char *name; |
| 1337 | int len; |
| 1338 | symbolS *sym; |
| 1339 | expressionS exp; |
| 1340 | |
| 1341 | name = demand_copy_C_string (&len); |
| 1342 | |
| 1343 | if (*input_line_pointer != ',') |
| 1344 | { |
| 1345 | as_bad ("missing value"); |
| 1346 | return; |
| 1347 | } |
| 1348 | ++input_line_pointer; |
| 1349 | |
| 1350 | sym = symbol_make (name); |
| 1351 | |
| 1352 | (void) expression (&exp); |
| 1353 | |
| 1354 | switch (exp.X_op) |
| 1355 | { |
| 1356 | case O_illegal: |
| 1357 | case O_absent: |
| 1358 | case O_big: |
| 1359 | as_bad ("illegal .stabx expression; zero assumed"); |
| 1360 | exp.X_add_number = 0; |
| 1361 | /* Fall through. */ |
| 1362 | case O_constant: |
| 1363 | S_SET_VALUE (sym, (valueT) exp.X_add_number); |
| 1364 | sym->sy_frag = &zero_address_frag; |
| 1365 | break; |
| 1366 | |
| 1367 | case O_symbol: |
| 1368 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section) |
| 1369 | sym->sy_value = exp; |
| 1370 | else |
| 1371 | { |
| 1372 | S_SET_VALUE (sym, |
| 1373 | exp.X_add_number + S_GET_VALUE (exp.X_add_symbol)); |
| 1374 | sym->sy_frag = exp.X_add_symbol->sy_frag; |
| 1375 | } |
| 1376 | break; |
| 1377 | |
| 1378 | default: |
| 1379 | /* The value is some complex expression. This will probably |
| 1380 | fail at some later point, but this is probably the right |
| 1381 | thing to do here. */ |
| 1382 | sym->sy_value = exp; |
| 1383 | break; |
| 1384 | } |
| 1385 | |
| 1386 | S_SET_SEGMENT (sym, ppc_coff_debug_section); |
| 1387 | sym->bsym->flags |= BSF_DEBUGGING; |
| 1388 | |
| 1389 | if (*input_line_pointer != ',') |
| 1390 | { |
| 1391 | as_bad ("missing class"); |
| 1392 | return; |
| 1393 | } |
| 1394 | ++input_line_pointer; |
| 1395 | |
| 1396 | S_SET_STORAGE_CLASS (sym, get_absolute_expression ()); |
| 1397 | |
| 1398 | if (*input_line_pointer != ',') |
| 1399 | { |
| 1400 | as_bad ("missing type"); |
| 1401 | return; |
| 1402 | } |
| 1403 | ++input_line_pointer; |
| 1404 | |
| 1405 | S_SET_DATA_TYPE (sym, get_absolute_expression ()); |
| 1406 | |
| 1407 | sym->sy_tc.output = 1; |
| 1408 | |
| 1409 | if (S_GET_STORAGE_CLASS (sym) == C_STSYM) |
| 1410 | sym->sy_tc.within = ppc_current_block; |
| 1411 | |
| 1412 | if (exp.X_op != O_symbol |
| 1413 | || ! S_IS_EXTERNAL (exp.X_add_symbol) |
| 1414 | || S_GET_SEGMENT (exp.X_add_symbol) != bss_section) |
| 1415 | ppc_frob_label (sym); |
| 1416 | else |
| 1417 | { |
| 1418 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); |
| 1419 | symbol_append (sym, exp.X_add_symbol, &symbol_rootP, &symbol_lastP); |
| 1420 | if (ppc_current_csect->sy_tc.within == exp.X_add_symbol) |
| 1421 | ppc_current_csect->sy_tc.within = sym; |
| 1422 | } |
| 1423 | |
| 1424 | if (strlen (name) > SYMNMLEN) |
| 1425 | { |
| 1426 | /* For some reason, each name is preceded by a two byte length |
| 1427 | and followed by a null byte. */ |
| 1428 | ppc_debug_name_section_size += strlen (name) + 3; |
| 1429 | } |
| 1430 | |
| 1431 | demand_empty_rest_of_line (); |
| 1432 | } |
| 1433 | |
| 1434 | /* The .function pseudo-op. This takes several arguments. The first |
| 1435 | argument seems to be the external name of the symbol. The second |
| 1436 | argment seems to be the label for the start of the function. gcc |
| 1437 | uses the same name for both. I have no idea what the third and |
| 1438 | fourth arguments are meant to be. The optional fifth argument is |
| 1439 | an expression for the size of the function. In COFF this symbol |
| 1440 | gets an aux entry like that used for a csect. */ |
| 1441 | |
| 1442 | static void |
| 1443 | ppc_function (ignore) |
| 1444 | int ignore; |
| 1445 | { |
| 1446 | char *name; |
| 1447 | char endc; |
| 1448 | char *s; |
| 1449 | symbolS *ext_sym; |
| 1450 | symbolS *lab_sym; |
| 1451 | |
| 1452 | name = input_line_pointer; |
| 1453 | endc = get_symbol_end (); |
| 1454 | |
| 1455 | /* Ignore any [PR] suffix. */ |
| 1456 | name = ppc_canonicalize_symbol_name (name); |
| 1457 | s = strchr (name, '['); |
| 1458 | if (s != (char *) NULL |
| 1459 | && strcmp (s + 1, "PR]") == 0) |
| 1460 | *s = '\0'; |
| 1461 | |
| 1462 | ext_sym = symbol_find_or_make (name); |
| 1463 | |
| 1464 | *input_line_pointer = endc; |
| 1465 | |
| 1466 | if (*input_line_pointer != ',') |
| 1467 | { |
| 1468 | as_bad ("missing symbol name"); |
| 1469 | ignore_rest_of_line (); |
| 1470 | return; |
| 1471 | } |
| 1472 | ++input_line_pointer; |
| 1473 | |
| 1474 | name = input_line_pointer; |
| 1475 | endc = get_symbol_end (); |
| 1476 | |
| 1477 | lab_sym = symbol_find_or_make (name); |
| 1478 | |
| 1479 | *input_line_pointer = endc; |
| 1480 | |
| 1481 | if (ext_sym != lab_sym) |
| 1482 | { |
| 1483 | ext_sym->sy_value.X_op = O_symbol; |
| 1484 | ext_sym->sy_value.X_add_symbol = lab_sym; |
| 1485 | ext_sym->sy_value.X_op_symbol = NULL; |
| 1486 | ext_sym->sy_value.X_add_number = 0; |
| 1487 | } |
| 1488 | |
| 1489 | if (ext_sym->sy_tc.class == -1) |
| 1490 | ext_sym->sy_tc.class = XMC_PR; |
| 1491 | ext_sym->sy_tc.output = 1; |
| 1492 | |
| 1493 | if (*input_line_pointer == ',') |
| 1494 | { |
| 1495 | expressionS ignore; |
| 1496 | |
| 1497 | /* Ignore the third argument. */ |
| 1498 | ++input_line_pointer; |
| 1499 | expression (&ignore); |
| 1500 | if (*input_line_pointer == ',') |
| 1501 | { |
| 1502 | /* Ignore the fourth argument. */ |
| 1503 | ++input_line_pointer; |
| 1504 | expression (&ignore); |
| 1505 | if (*input_line_pointer == ',') |
| 1506 | { |
| 1507 | /* The fifth argument is the function size. */ |
| 1508 | ++input_line_pointer; |
| 1509 | ext_sym->sy_tc.size = symbol_new ("L0\001", |
| 1510 | absolute_section, |
| 1511 | (valueT) 0, |
| 1512 | &zero_address_frag); |
| 1513 | pseudo_set (ext_sym->sy_tc.size); |
| 1514 | } |
| 1515 | } |
| 1516 | } |
| 1517 | |
| 1518 | S_SET_DATA_TYPE (ext_sym, DT_FCN << N_BTSHFT); |
| 1519 | SF_SET_FUNCTION (ext_sym); |
| 1520 | SF_SET_PROCESS (ext_sym); |
| 1521 | coff_add_linesym (ext_sym); |
| 1522 | |
| 1523 | demand_empty_rest_of_line (); |
| 1524 | } |
| 1525 | |
| 1526 | /* The .bf pseudo-op. This is just like a COFF C_FCN symbol named |
| 1527 | ".bf". */ |
| 1528 | |
| 1529 | static void |
| 1530 | ppc_bf (ignore) |
| 1531 | int ignore; |
| 1532 | { |
| 1533 | symbolS *sym; |
| 1534 | |
| 1535 | sym = symbol_make (".bf"); |
| 1536 | S_SET_SEGMENT (sym, text_section); |
| 1537 | sym->sy_frag = frag_now; |
| 1538 | S_SET_VALUE (sym, frag_now_fix ()); |
| 1539 | S_SET_STORAGE_CLASS (sym, C_FCN); |
| 1540 | |
| 1541 | coff_line_base = get_absolute_expression (); |
| 1542 | |
| 1543 | S_SET_NUMBER_AUXILIARY (sym, 1); |
| 1544 | SA_SET_SYM_LNNO (sym, coff_line_base); |
| 1545 | |
| 1546 | sym->sy_tc.output = 1; |
| 1547 | |
| 1548 | ppc_frob_label (sym); |
| 1549 | |
| 1550 | demand_empty_rest_of_line (); |
| 1551 | } |
| 1552 | |
| 1553 | /* The .ef pseudo-op. This is just like a COFF C_FCN symbol named |
| 1554 | ".ef", except that the line number is absolute, not relative to the |
| 1555 | most recent ".bf" symbol. */ |
| 1556 | |
| 1557 | static void |
| 1558 | ppc_ef (ignore) |
| 1559 | int ignore; |
| 1560 | { |
| 1561 | symbolS *sym; |
| 1562 | |
| 1563 | sym = symbol_make (".ef"); |
| 1564 | S_SET_SEGMENT (sym, text_section); |
| 1565 | sym->sy_frag = frag_now; |
| 1566 | S_SET_VALUE (sym, frag_now_fix ()); |
| 1567 | S_SET_STORAGE_CLASS (sym, C_FCN); |
| 1568 | S_SET_NUMBER_AUXILIARY (sym, 1); |
| 1569 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); |
| 1570 | sym->sy_tc.output = 1; |
| 1571 | |
| 1572 | ppc_frob_label (sym); |
| 1573 | |
| 1574 | demand_empty_rest_of_line (); |
| 1575 | } |
| 1576 | |
| 1577 | /* The .bi and .ei pseudo-ops. These take a string argument and |
| 1578 | generates a C_BINCL or C_EINCL symbol, which goes at the start of |
| 1579 | the symbol list. */ |
| 1580 | |
| 1581 | static void |
| 1582 | ppc_biei (ei) |
| 1583 | int ei; |
| 1584 | { |
| 1585 | char *name; |
| 1586 | int len; |
| 1587 | symbolS *sym; |
| 1588 | symbolS *look; |
| 1589 | |
| 1590 | name = demand_copy_C_string (&len); |
| 1591 | |
| 1592 | sym = symbol_make (name); |
| 1593 | S_SET_SEGMENT (sym, ppc_coff_debug_section); |
| 1594 | sym->bsym->flags |= BSF_DEBUGGING; |
| 1595 | |
| 1596 | /* FIXME: The value of the .bi or .ei symbol is supposed to be the |
| 1597 | offset in the file to the line number entry to use. That is |
| 1598 | quite difficult to implement using BFD, so I'm just not doing it. |
| 1599 | Sorry. Please add it if you can figure out how. Note that this |
| 1600 | approach is the only way to support multiple files in COFF, since |
| 1601 | line numbers are associated with function symbols. Note further |
| 1602 | that it still doesn't work, since the line numbers are stored as |
| 1603 | offsets from a base line number. */ |
| 1604 | |
| 1605 | S_SET_STORAGE_CLASS (sym, ei ? C_EINCL : C_BINCL); |
| 1606 | sym->sy_tc.output = 1; |
| 1607 | |
| 1608 | for (look = symbol_rootP; |
| 1609 | (look != (symbolS *) NULL |
| 1610 | && (S_GET_STORAGE_CLASS (look) == C_FILE |
| 1611 | || S_GET_STORAGE_CLASS (look) == C_BINCL |
| 1612 | || S_GET_STORAGE_CLASS (look) == C_EINCL)); |
| 1613 | look = symbol_next (look)) |
| 1614 | ; |
| 1615 | if (look != (symbolS *) NULL) |
| 1616 | { |
| 1617 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); |
| 1618 | symbol_insert (sym, look, &symbol_rootP, &symbol_lastP); |
| 1619 | } |
| 1620 | |
| 1621 | demand_empty_rest_of_line (); |
| 1622 | } |
| 1623 | |
| 1624 | /* The .bs pseudo-op. This generates a C_BSTAT symbol named ".bs". |
| 1625 | There is one argument, which is a csect symbol. The value of the |
| 1626 | .bs symbol is the index of this csect symbol. */ |
| 1627 | |
| 1628 | static void |
| 1629 | ppc_bs (ignore) |
| 1630 | int ignore; |
| 1631 | { |
| 1632 | char *name; |
| 1633 | char endc; |
| 1634 | symbolS *csect; |
| 1635 | symbolS *sym; |
| 1636 | |
| 1637 | if (ppc_current_block != NULL) |
| 1638 | as_bad ("nested .bs blocks"); |
| 1639 | |
| 1640 | name = input_line_pointer; |
| 1641 | endc = get_symbol_end (); |
| 1642 | |
| 1643 | csect = symbol_find_or_make (name); |
| 1644 | |
| 1645 | *input_line_pointer = endc; |
| 1646 | |
| 1647 | sym = symbol_make (".bs"); |
| 1648 | S_SET_SEGMENT (sym, now_seg); |
| 1649 | S_SET_STORAGE_CLASS (sym, C_BSTAT); |
| 1650 | sym->bsym->flags |= BSF_DEBUGGING; |
| 1651 | sym->sy_tc.output = 1; |
| 1652 | |
| 1653 | sym->sy_tc.within = csect; |
| 1654 | |
| 1655 | ppc_frob_label (sym); |
| 1656 | |
| 1657 | ppc_current_block = sym; |
| 1658 | |
| 1659 | demand_empty_rest_of_line (); |
| 1660 | } |
| 1661 | |
| 1662 | /* The .es pseudo-op. Generate a C_ESTART symbol named .es. */ |
| 1663 | |
| 1664 | static void |
| 1665 | ppc_es (ignore) |
| 1666 | int ignore; |
| 1667 | { |
| 1668 | symbolS *sym; |
| 1669 | |
| 1670 | if (ppc_current_block == NULL) |
| 1671 | as_bad (".es without preceding .bs"); |
| 1672 | |
| 1673 | sym = symbol_make (".es"); |
| 1674 | S_SET_SEGMENT (sym, now_seg); |
| 1675 | S_SET_STORAGE_CLASS (sym, C_ESTAT); |
| 1676 | sym->bsym->flags |= BSF_DEBUGGING; |
| 1677 | sym->sy_tc.output = 1; |
| 1678 | |
| 1679 | ppc_frob_label (sym); |
| 1680 | |
| 1681 | ppc_current_block = NULL; |
| 1682 | |
| 1683 | demand_empty_rest_of_line (); |
| 1684 | } |
| 1685 | |
| 1686 | /* The .bb pseudo-op. Generate a C_BLOCK symbol named .bb, with a |
| 1687 | line number. */ |
| 1688 | |
| 1689 | static void |
| 1690 | ppc_bb (ignore) |
| 1691 | int ignore; |
| 1692 | { |
| 1693 | symbolS *sym; |
| 1694 | |
| 1695 | sym = symbol_make (".bb"); |
| 1696 | S_SET_SEGMENT (sym, text_section); |
| 1697 | sym->sy_frag = frag_now; |
| 1698 | S_SET_VALUE (sym, frag_now_fix ()); |
| 1699 | S_SET_STORAGE_CLASS (sym, C_BLOCK); |
| 1700 | |
| 1701 | S_SET_NUMBER_AUXILIARY (sym, 1); |
| 1702 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); |
| 1703 | |
| 1704 | sym->sy_tc.output = 1; |
| 1705 | |
| 1706 | ppc_frob_label (sym); |
| 1707 | |
| 1708 | demand_empty_rest_of_line (); |
| 1709 | } |
| 1710 | |
| 1711 | /* The .eb pseudo-op. Generate a C_BLOCK symbol named .eb, with a |
| 1712 | line number. */ |
| 1713 | |
| 1714 | static void |
| 1715 | ppc_eb (ignore) |
| 1716 | int ignore; |
| 1717 | { |
| 1718 | symbolS *sym; |
| 1719 | |
| 1720 | sym = symbol_make (".eb"); |
| 1721 | S_SET_SEGMENT (sym, text_section); |
| 1722 | sym->sy_frag = frag_now; |
| 1723 | S_SET_VALUE (sym, frag_now_fix ()); |
| 1724 | S_SET_STORAGE_CLASS (sym, C_FCN); |
| 1725 | S_SET_NUMBER_AUXILIARY (sym, 1); |
| 1726 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); |
| 1727 | sym->sy_tc.output = 1; |
| 1728 | |
| 1729 | ppc_frob_label (sym); |
| 1730 | |
| 1731 | demand_empty_rest_of_line (); |
| 1732 | } |
| 1733 | |
| 1734 | /* The .toc pseudo-op. Switch to the .toc subsegment. */ |
| 1735 | |
| 1736 | static void |
| 1737 | ppc_toc (ignore) |
| 1738 | int ignore; |
| 1739 | { |
| 1740 | if (ppc_toc_csect != (symbolS *) NULL) |
| 1741 | subseg_set (data_section, ppc_toc_csect->sy_tc.subseg); |
| 1742 | else |
| 1743 | { |
| 1744 | subsegT subseg; |
| 1745 | symbolS *sym; |
| 1746 | symbolS *list; |
| 1747 | |
| 1748 | subseg = ppc_data_subsegment; |
| 1749 | ++ppc_data_subsegment; |
| 1750 | |
| 1751 | subseg_new (segment_name (data_section), subseg); |
| 1752 | ppc_toc_frag = frag_now; |
| 1753 | |
| 1754 | sym = symbol_find_or_make ("TOC[TC0]"); |
| 1755 | sym->sy_frag = frag_now; |
| 1756 | S_SET_SEGMENT (sym, data_section); |
| 1757 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); |
| 1758 | sym->sy_tc.subseg = subseg; |
| 1759 | sym->sy_tc.output = 1; |
| 1760 | sym->sy_tc.within = sym; |
| 1761 | |
| 1762 | ppc_toc_csect = sym; |
| 1763 | |
| 1764 | for (list = ppc_data_csects; |
| 1765 | list->sy_tc.next != (symbolS *) NULL; |
| 1766 | list = list->sy_tc.next) |
| 1767 | ; |
| 1768 | list->sy_tc.next = sym; |
| 1769 | |
| 1770 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); |
| 1771 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); |
| 1772 | } |
| 1773 | |
| 1774 | ppc_current_csect = ppc_toc_csect; |
| 1775 | |
| 1776 | demand_empty_rest_of_line (); |
| 1777 | } |
| 1778 | |
| 1779 | #endif /* OBJ_COFF */ |
| 1780 | \f |
| 1781 | /* The .tc pseudo-op. This is used when generating either XCOFF or |
| 1782 | ELF. This takes two or more arguments. |
| 1783 | |
| 1784 | When generating XCOFF output, the first argument is the name to |
| 1785 | give to this location in the toc; this will be a symbol with class |
| 1786 | TC. The rest of the arguments are 4 byte values to actually put at |
| 1787 | this location in the TOC; often there is just one more argument, a |
| 1788 | relocateable symbol reference. |
| 1789 | |
| 1790 | When not generating XCOFF output, the arguments are the same, but |
| 1791 | the first argument is simply ignored. */ |
| 1792 | |
| 1793 | static void |
| 1794 | ppc_tc (ignore) |
| 1795 | int ignore; |
| 1796 | { |
| 1797 | #ifdef OBJ_COFF |
| 1798 | |
| 1799 | /* Define the TOC symbol name. */ |
| 1800 | { |
| 1801 | char *name; |
| 1802 | char endc; |
| 1803 | symbolS *sym; |
| 1804 | |
| 1805 | if (ppc_toc_csect == (symbolS *) NULL |
| 1806 | || ppc_toc_csect != ppc_current_csect) |
| 1807 | { |
| 1808 | as_bad (".tc not in .toc section"); |
| 1809 | ignore_rest_of_line (); |
| 1810 | return; |
| 1811 | } |
| 1812 | |
| 1813 | name = input_line_pointer; |
| 1814 | endc = get_symbol_end (); |
| 1815 | |
| 1816 | sym = symbol_find_or_make (name); |
| 1817 | |
| 1818 | *input_line_pointer = endc; |
| 1819 | |
| 1820 | if (S_IS_DEFINED (sym)) |
| 1821 | { |
| 1822 | symbolS *label; |
| 1823 | |
| 1824 | label = ppc_current_csect->sy_tc.within; |
| 1825 | if (label->sy_tc.class != XMC_TC0) |
| 1826 | { |
| 1827 | as_warn (".tc with no label"); |
| 1828 | ignore_rest_of_line (); |
| 1829 | return; |
| 1830 | } |
| 1831 | |
| 1832 | S_SET_SEGMENT (label, S_GET_SEGMENT (sym)); |
| 1833 | label->sy_frag = sym->sy_frag; |
| 1834 | S_SET_VALUE (label, S_GET_VALUE (sym)); |
| 1835 | |
| 1836 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1837 | ++input_line_pointer; |
| 1838 | |
| 1839 | return; |
| 1840 | } |
| 1841 | |
| 1842 | S_SET_SEGMENT (sym, now_seg); |
| 1843 | sym->sy_frag = frag_now; |
| 1844 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); |
| 1845 | sym->sy_tc.class = XMC_TC; |
| 1846 | sym->sy_tc.output = 1; |
| 1847 | |
| 1848 | ppc_frob_label (sym); |
| 1849 | } |
| 1850 | |
| 1851 | #else /* ! defined (OBJ_COFF) */ |
| 1852 | |
| 1853 | /* Skip the TOC symbol name. */ |
| 1854 | while (is_part_of_name (*input_line_pointer) |
| 1855 | || *input_line_pointer == '[' |
| 1856 | || *input_line_pointer == ']' |
| 1857 | || *input_line_pointer == '{' |
| 1858 | || *input_line_pointer == '}') |
| 1859 | ++input_line_pointer; |
| 1860 | |
| 1861 | /* Align to a four byte boundary. */ |
| 1862 | frag_align (2, 0); |
| 1863 | record_alignment (now_seg, 2); |
| 1864 | |
| 1865 | #endif /* ! defined (OBJ_COFF) */ |
| 1866 | |
| 1867 | if (*input_line_pointer != ',') |
| 1868 | demand_empty_rest_of_line (); |
| 1869 | else |
| 1870 | { |
| 1871 | ++input_line_pointer; |
| 1872 | cons (4); |
| 1873 | } |
| 1874 | } |
| 1875 | \f |
| 1876 | #ifdef OBJ_COFF |
| 1877 | |
| 1878 | /* XCOFF specific symbol and file handling. */ |
| 1879 | |
| 1880 | /* Canonicalize the symbol name. We use the to force the suffix, if |
| 1881 | any, to use square brackets, and to be in upper case. */ |
| 1882 | |
| 1883 | char * |
| 1884 | ppc_canonicalize_symbol_name (name) |
| 1885 | char *name; |
| 1886 | { |
| 1887 | char *s; |
| 1888 | |
| 1889 | for (s = name; *s != '\0' && *s != '{' && *s != '['; s++) |
| 1890 | ; |
| 1891 | if (*s != '\0') |
| 1892 | { |
| 1893 | char brac; |
| 1894 | |
| 1895 | if (*s == '[') |
| 1896 | brac = ']'; |
| 1897 | else |
| 1898 | { |
| 1899 | *s = '['; |
| 1900 | brac = '}'; |
| 1901 | } |
| 1902 | |
| 1903 | for (s++; *s != '\0' && *s != brac; s++) |
| 1904 | if (islower (*s)) |
| 1905 | *s = toupper (*s); |
| 1906 | |
| 1907 | if (*s == '\0' || s[1] != '\0') |
| 1908 | as_bad ("bad symbol suffix"); |
| 1909 | |
| 1910 | *s = ']'; |
| 1911 | } |
| 1912 | |
| 1913 | return name; |
| 1914 | } |
| 1915 | |
| 1916 | /* Set the class of a symbol based on the suffix, if any. This is |
| 1917 | called whenever a new symbol is created. */ |
| 1918 | |
| 1919 | void |
| 1920 | ppc_symbol_new_hook (sym) |
| 1921 | symbolS *sym; |
| 1922 | { |
| 1923 | const char *s; |
| 1924 | |
| 1925 | sym->sy_tc.next = NULL; |
| 1926 | sym->sy_tc.output = 0; |
| 1927 | sym->sy_tc.class = -1; |
| 1928 | sym->sy_tc.real_name = NULL; |
| 1929 | sym->sy_tc.subseg = 0; |
| 1930 | sym->sy_tc.align = 0; |
| 1931 | sym->sy_tc.size = NULL; |
| 1932 | sym->sy_tc.within = NULL; |
| 1933 | |
| 1934 | s = strchr (S_GET_NAME (sym), '['); |
| 1935 | if (s == (const char *) NULL) |
| 1936 | { |
| 1937 | /* There is no suffix. */ |
| 1938 | return; |
| 1939 | } |
| 1940 | |
| 1941 | ++s; |
| 1942 | |
| 1943 | switch (s[0]) |
| 1944 | { |
| 1945 | case 'B': |
| 1946 | if (strcmp (s, "BS]") == 0) |
| 1947 | sym->sy_tc.class = XMC_BS; |
| 1948 | break; |
| 1949 | case 'D': |
| 1950 | if (strcmp (s, "DB]") == 0) |
| 1951 | sym->sy_tc.class = XMC_DB; |
| 1952 | else if (strcmp (s, "DS]") == 0) |
| 1953 | sym->sy_tc.class = XMC_DS; |
| 1954 | break; |
| 1955 | case 'G': |
| 1956 | if (strcmp (s, "GL]") == 0) |
| 1957 | sym->sy_tc.class = XMC_GL; |
| 1958 | break; |
| 1959 | case 'P': |
| 1960 | if (strcmp (s, "PR]") == 0) |
| 1961 | sym->sy_tc.class = XMC_PR; |
| 1962 | break; |
| 1963 | case 'R': |
| 1964 | if (strcmp (s, "RO]") == 0) |
| 1965 | sym->sy_tc.class = XMC_RO; |
| 1966 | else if (strcmp (s, "RW]") == 0) |
| 1967 | sym->sy_tc.class = XMC_RW; |
| 1968 | break; |
| 1969 | case 'S': |
| 1970 | if (strcmp (s, "SV]") == 0) |
| 1971 | sym->sy_tc.class = XMC_SV; |
| 1972 | break; |
| 1973 | case 'T': |
| 1974 | if (strcmp (s, "TC]") == 0) |
| 1975 | sym->sy_tc.class = XMC_TC; |
| 1976 | else if (strcmp (s, "TI]") == 0) |
| 1977 | sym->sy_tc.class = XMC_TI; |
| 1978 | else if (strcmp (s, "TB]") == 0) |
| 1979 | sym->sy_tc.class = XMC_TB; |
| 1980 | else if (strcmp (s, "TC0]") == 0 || strcmp (s, "T0]") == 0) |
| 1981 | sym->sy_tc.class = XMC_TC0; |
| 1982 | break; |
| 1983 | case 'U': |
| 1984 | if (strcmp (s, "UA]") == 0) |
| 1985 | sym->sy_tc.class = XMC_UA; |
| 1986 | else if (strcmp (s, "UC]") == 0) |
| 1987 | sym->sy_tc.class = XMC_UC; |
| 1988 | break; |
| 1989 | case 'X': |
| 1990 | if (strcmp (s, "XO]") == 0) |
| 1991 | sym->sy_tc.class = XMC_XO; |
| 1992 | break; |
| 1993 | } |
| 1994 | |
| 1995 | if (sym->sy_tc.class == -1) |
| 1996 | as_bad ("Unrecognized symbol suffix"); |
| 1997 | } |
| 1998 | |
| 1999 | /* Set the class of a label based on where it is defined. This |
| 2000 | handles symbols without suffixes. Also, move the symbol so that it |
| 2001 | follows the csect symbol. */ |
| 2002 | |
| 2003 | void |
| 2004 | ppc_frob_label (sym) |
| 2005 | symbolS *sym; |
| 2006 | { |
| 2007 | if (ppc_current_csect != (symbolS *) NULL) |
| 2008 | { |
| 2009 | if (sym->sy_tc.class == -1) |
| 2010 | sym->sy_tc.class = ppc_current_csect->sy_tc.class; |
| 2011 | |
| 2012 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); |
| 2013 | symbol_append (sym, ppc_current_csect->sy_tc.within, &symbol_rootP, |
| 2014 | &symbol_lastP); |
| 2015 | ppc_current_csect->sy_tc.within = sym; |
| 2016 | } |
| 2017 | } |
| 2018 | |
| 2019 | /* Change the name of a symbol just before writing it out. Set the |
| 2020 | real name if the .rename pseudo-op was used. Otherwise, remove any |
| 2021 | class suffix. Return 1 if the symbol should not be included in the |
| 2022 | symbol table. */ |
| 2023 | |
| 2024 | int |
| 2025 | ppc_frob_symbol (sym) |
| 2026 | symbolS *sym; |
| 2027 | { |
| 2028 | static symbolS *ppc_last_function; |
| 2029 | static symbolS *set_end; |
| 2030 | |
| 2031 | /* Discard symbols that should not be included in the output symbol |
| 2032 | table. */ |
| 2033 | if (! sym->sy_used_in_reloc |
| 2034 | && ((sym->bsym->flags & BSF_SECTION_SYM) != 0 |
| 2035 | || (! S_IS_EXTERNAL (sym) |
| 2036 | && ! sym->sy_tc.output |
| 2037 | && S_GET_STORAGE_CLASS (sym) != C_FILE))) |
| 2038 | return 1; |
| 2039 | |
| 2040 | if (sym->sy_tc.real_name != (char *) NULL) |
| 2041 | S_SET_NAME (sym, sym->sy_tc.real_name); |
| 2042 | else |
| 2043 | { |
| 2044 | const char *name; |
| 2045 | const char *s; |
| 2046 | |
| 2047 | name = S_GET_NAME (sym); |
| 2048 | s = strchr (name, '['); |
| 2049 | if (s != (char *) NULL) |
| 2050 | { |
| 2051 | unsigned int len; |
| 2052 | char *snew; |
| 2053 | |
| 2054 | len = s - name; |
| 2055 | snew = xmalloc (len + 1); |
| 2056 | memcpy (snew, name, len); |
| 2057 | snew[len] = '\0'; |
| 2058 | |
| 2059 | S_SET_NAME (sym, snew); |
| 2060 | } |
| 2061 | } |
| 2062 | |
| 2063 | if (set_end != (symbolS *) NULL) |
| 2064 | { |
| 2065 | SA_SET_SYM_ENDNDX (set_end, sym); |
| 2066 | set_end = NULL; |
| 2067 | } |
| 2068 | |
| 2069 | if (SF_GET_FUNCTION (sym)) |
| 2070 | { |
| 2071 | if (ppc_last_function != (symbolS *) NULL) |
| 2072 | as_warn ("two .function pseudo-ops with no intervening .ef"); |
| 2073 | ppc_last_function = sym; |
| 2074 | if (sym->sy_tc.size != (symbolS *) NULL) |
| 2075 | { |
| 2076 | resolve_symbol_value (sym->sy_tc.size); |
| 2077 | SA_SET_SYM_FSIZE (sym, (long) S_GET_VALUE (sym->sy_tc.size)); |
| 2078 | } |
| 2079 | } |
| 2080 | else if (S_GET_STORAGE_CLASS (sym) == C_FCN |
| 2081 | && strcmp (S_GET_NAME (sym), ".ef") == 0) |
| 2082 | { |
| 2083 | if (ppc_last_function == (symbolS *) NULL) |
| 2084 | as_warn (".ef with no preceding .function"); |
| 2085 | else |
| 2086 | { |
| 2087 | set_end = ppc_last_function; |
| 2088 | ppc_last_function = NULL; |
| 2089 | |
| 2090 | /* We don't have a C_EFCN symbol, but we need to force the |
| 2091 | COFF backend to believe that it has seen one. */ |
| 2092 | coff_last_function = NULL; |
| 2093 | } |
| 2094 | } |
| 2095 | |
| 2096 | if (! S_IS_EXTERNAL (sym) |
| 2097 | && (sym->bsym->flags & BSF_SECTION_SYM) == 0 |
| 2098 | && S_GET_STORAGE_CLASS (sym) != C_FILE |
| 2099 | && S_GET_STORAGE_CLASS (sym) != C_FCN |
| 2100 | && S_GET_STORAGE_CLASS (sym) != C_BSTAT |
| 2101 | && S_GET_STORAGE_CLASS (sym) != C_ESTAT |
| 2102 | && S_GET_SEGMENT (sym) != ppc_coff_debug_section) |
| 2103 | S_SET_STORAGE_CLASS (sym, C_HIDEXT); |
| 2104 | |
| 2105 | if (S_GET_STORAGE_CLASS (sym) == C_EXT |
| 2106 | || S_GET_STORAGE_CLASS (sym) == C_HIDEXT) |
| 2107 | { |
| 2108 | int i; |
| 2109 | union internal_auxent *a; |
| 2110 | |
| 2111 | /* Create a csect aux. */ |
| 2112 | i = S_GET_NUMBER_AUXILIARY (sym); |
| 2113 | S_SET_NUMBER_AUXILIARY (sym, i + 1); |
| 2114 | a = &coffsymbol (sym->bsym)->native[i + 1].u.auxent; |
| 2115 | if (sym->sy_tc.class == XMC_TC0) |
| 2116 | { |
| 2117 | /* This is the TOC table. */ |
| 2118 | know (strcmp (S_GET_NAME (sym), "TOC") == 0); |
| 2119 | a->x_csect.x_scnlen.l = 0; |
| 2120 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; |
| 2121 | } |
| 2122 | else if (sym->sy_tc.subseg != 0) |
| 2123 | { |
| 2124 | /* This is a csect symbol. x_scnlen is the size of the |
| 2125 | csect. */ |
| 2126 | if (sym->sy_tc.next == (symbolS *) NULL) |
| 2127 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, |
| 2128 | S_GET_SEGMENT (sym)) |
| 2129 | - S_GET_VALUE (sym)); |
| 2130 | else |
| 2131 | { |
| 2132 | resolve_symbol_value (sym->sy_tc.next); |
| 2133 | a->x_csect.x_scnlen.l = (S_GET_VALUE (sym->sy_tc.next) |
| 2134 | - S_GET_VALUE (sym)); |
| 2135 | } |
| 2136 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_SD; |
| 2137 | } |
| 2138 | else if (S_GET_SEGMENT (sym) == bss_section) |
| 2139 | { |
| 2140 | /* This is a common symbol. */ |
| 2141 | a->x_csect.x_scnlen.l = sym->sy_frag->fr_offset; |
| 2142 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_CM; |
| 2143 | if (S_IS_EXTERNAL (sym)) |
| 2144 | sym->sy_tc.class = XMC_RW; |
| 2145 | else |
| 2146 | sym->sy_tc.class = XMC_BS; |
| 2147 | } |
| 2148 | else if (! S_IS_DEFINED (sym)) |
| 2149 | { |
| 2150 | /* This is an external symbol. */ |
| 2151 | a->x_csect.x_scnlen.l = 0; |
| 2152 | a->x_csect.x_smtyp = XTY_ER; |
| 2153 | } |
| 2154 | else if (sym->sy_tc.class == XMC_TC) |
| 2155 | { |
| 2156 | symbolS *next; |
| 2157 | |
| 2158 | /* This is a TOC definition. x_scnlen is the size of the |
| 2159 | TOC entry. */ |
| 2160 | next = symbol_next (sym); |
| 2161 | while (next->sy_tc.class == XMC_TC0) |
| 2162 | next = symbol_next (next); |
| 2163 | if (next == (symbolS *) NULL |
| 2164 | || next->sy_tc.class != XMC_TC) |
| 2165 | { |
| 2166 | if (ppc_after_toc_frag == (fragS *) NULL) |
| 2167 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, |
| 2168 | data_section) |
| 2169 | - S_GET_VALUE (sym)); |
| 2170 | else |
| 2171 | a->x_csect.x_scnlen.l = (ppc_after_toc_frag->fr_address |
| 2172 | - S_GET_VALUE (sym)); |
| 2173 | } |
| 2174 | else |
| 2175 | { |
| 2176 | resolve_symbol_value (next); |
| 2177 | a->x_csect.x_scnlen.l = (S_GET_VALUE (next) |
| 2178 | - S_GET_VALUE (sym)); |
| 2179 | } |
| 2180 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; |
| 2181 | } |
| 2182 | else |
| 2183 | { |
| 2184 | symbolS *csect; |
| 2185 | |
| 2186 | /* This is a normal symbol definition. x_scnlen is the |
| 2187 | symbol index of the containing csect. */ |
| 2188 | if (S_GET_SEGMENT (sym) == text_section) |
| 2189 | csect = ppc_text_csects; |
| 2190 | else if (S_GET_SEGMENT (sym) == data_section) |
| 2191 | csect = ppc_data_csects; |
| 2192 | else |
| 2193 | abort (); |
| 2194 | |
| 2195 | /* Skip the initial dummy symbol. */ |
| 2196 | csect = csect->sy_tc.next; |
| 2197 | |
| 2198 | if (csect == (symbolS *) NULL) |
| 2199 | a->x_csect.x_scnlen.l = 0; |
| 2200 | else |
| 2201 | { |
| 2202 | while (csect->sy_tc.next != (symbolS *) NULL) |
| 2203 | { |
| 2204 | resolve_symbol_value (csect->sy_tc.next); |
| 2205 | if (S_GET_VALUE (csect->sy_tc.next) > S_GET_VALUE (sym)) |
| 2206 | break; |
| 2207 | csect = csect->sy_tc.next; |
| 2208 | } |
| 2209 | |
| 2210 | a->x_csect.x_scnlen.p = coffsymbol (csect->bsym)->native; |
| 2211 | coffsymbol (sym->bsym)->native[i + 1].fix_scnlen = 1; |
| 2212 | } |
| 2213 | a->x_csect.x_smtyp = XTY_LD; |
| 2214 | } |
| 2215 | |
| 2216 | a->x_csect.x_parmhash = 0; |
| 2217 | a->x_csect.x_snhash = 0; |
| 2218 | if (sym->sy_tc.class == -1) |
| 2219 | a->x_csect.x_smclas = XMC_PR; |
| 2220 | else |
| 2221 | a->x_csect.x_smclas = sym->sy_tc.class; |
| 2222 | a->x_csect.x_stab = 0; |
| 2223 | a->x_csect.x_snstab = 0; |
| 2224 | } |
| 2225 | else if (S_GET_STORAGE_CLASS (sym) == C_BSTAT) |
| 2226 | { |
| 2227 | /* We want the value to be the symbol index of the referenced |
| 2228 | csect symbol. BFD will do that for us if we set the right |
| 2229 | flags. */ |
| 2230 | S_SET_VALUE (sym, |
| 2231 | (valueT) coffsymbol (sym->sy_tc.within->bsym)->native); |
| 2232 | coffsymbol (sym->bsym)->native->fix_value = 1; |
| 2233 | } |
| 2234 | else if (S_GET_STORAGE_CLASS (sym) == C_STSYM) |
| 2235 | { |
| 2236 | symbolS *block; |
| 2237 | symbolS *csect; |
| 2238 | |
| 2239 | /* The value is the offset from the enclosing csect. */ |
| 2240 | block = sym->sy_tc.within; |
| 2241 | csect = block->sy_tc.within; |
| 2242 | resolve_symbol_value (csect); |
| 2243 | S_SET_VALUE (sym, S_GET_VALUE (sym) - S_GET_VALUE (csect)); |
| 2244 | } |
| 2245 | |
| 2246 | return 0; |
| 2247 | } |
| 2248 | |
| 2249 | /* Set the VMA for a section. This is called on all the sections in |
| 2250 | turn. */ |
| 2251 | |
| 2252 | void |
| 2253 | ppc_frob_section (sec) |
| 2254 | asection *sec; |
| 2255 | { |
| 2256 | static bfd_size_type vma = 0; |
| 2257 | |
| 2258 | bfd_set_section_vma (stdoutput, sec, vma); |
| 2259 | vma += bfd_section_size (stdoutput, sec); |
| 2260 | } |
| 2261 | |
| 2262 | /* Adjust the file by adding a .debug section if needed. */ |
| 2263 | |
| 2264 | void |
| 2265 | ppc_frob_file () |
| 2266 | { |
| 2267 | if (ppc_debug_name_section_size > 0) |
| 2268 | { |
| 2269 | asection *sec; |
| 2270 | |
| 2271 | sec = bfd_make_section (stdoutput, ".debug"); |
| 2272 | if (sec == (asection *) NULL |
| 2273 | || ! bfd_set_section_size (stdoutput, sec, |
| 2274 | ppc_debug_name_section_size) |
| 2275 | || ! bfd_set_section_flags (stdoutput, sec, |
| 2276 | SEC_HAS_CONTENTS | SEC_LOAD)) |
| 2277 | as_fatal ("can't make .debug section"); |
| 2278 | } |
| 2279 | } |
| 2280 | |
| 2281 | #endif /* OBJ_COFF */ |
| 2282 | \f |
| 2283 | /* Turn a string in input_line_pointer into a floating point constant |
| 2284 | of type type, and store the appropriate bytes in *litp. The number |
| 2285 | of LITTLENUMS emitted is stored in *sizep . An error message is |
| 2286 | returned, or NULL on OK. */ |
| 2287 | |
| 2288 | char * |
| 2289 | md_atof (type, litp, sizep) |
| 2290 | int type; |
| 2291 | char *litp; |
| 2292 | int *sizep; |
| 2293 | { |
| 2294 | int prec; |
| 2295 | LITTLENUM_TYPE words[4]; |
| 2296 | char *t; |
| 2297 | int i; |
| 2298 | |
| 2299 | switch (type) |
| 2300 | { |
| 2301 | case 'f': |
| 2302 | prec = 2; |
| 2303 | break; |
| 2304 | |
| 2305 | case 'd': |
| 2306 | prec = 4; |
| 2307 | break; |
| 2308 | |
| 2309 | default: |
| 2310 | *sizep = 0; |
| 2311 | return "bad call to md_atof"; |
| 2312 | } |
| 2313 | |
| 2314 | t = atof_ieee (input_line_pointer, type, words); |
| 2315 | if (t) |
| 2316 | input_line_pointer = t; |
| 2317 | |
| 2318 | *sizep = prec * 2; |
| 2319 | |
| 2320 | if (ppc_big_endian) |
| 2321 | { |
| 2322 | for (i = 0; i < prec; i++) |
| 2323 | { |
| 2324 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 2325 | litp += 2; |
| 2326 | } |
| 2327 | } |
| 2328 | else |
| 2329 | { |
| 2330 | for (i = prec - 1; i >= 0; i--) |
| 2331 | { |
| 2332 | md_number_to_chars (litp, (valueT) words[i], 2); |
| 2333 | litp += 2; |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | return NULL; |
| 2338 | } |
| 2339 | |
| 2340 | /* Write a value out to the object file, using the appropriate |
| 2341 | endianness. */ |
| 2342 | |
| 2343 | void |
| 2344 | md_number_to_chars (buf, val, n) |
| 2345 | char *buf; |
| 2346 | valueT val; |
| 2347 | int n; |
| 2348 | { |
| 2349 | if (ppc_big_endian) |
| 2350 | number_to_chars_bigendian (buf, val, n); |
| 2351 | else |
| 2352 | number_to_chars_littleendian (buf, val, n); |
| 2353 | } |
| 2354 | |
| 2355 | /* Align a section (I don't know why this is machine dependent). */ |
| 2356 | |
| 2357 | valueT |
| 2358 | md_section_align (seg, addr) |
| 2359 | asection *seg; |
| 2360 | valueT addr; |
| 2361 | { |
| 2362 | int align = bfd_get_section_alignment (stdoutput, seg); |
| 2363 | |
| 2364 | return ((addr + (1 << align) - 1) & (-1 << align)); |
| 2365 | } |
| 2366 | |
| 2367 | /* We don't have any form of relaxing. */ |
| 2368 | |
| 2369 | int |
| 2370 | md_estimate_size_before_relax (fragp, seg) |
| 2371 | fragS *fragp; |
| 2372 | asection *seg; |
| 2373 | { |
| 2374 | abort (); |
| 2375 | } |
| 2376 | |
| 2377 | /* Convert a machine dependent frag. We never generate these. */ |
| 2378 | |
| 2379 | void |
| 2380 | md_convert_frag (abfd, sec, fragp) |
| 2381 | bfd *abfd; |
| 2382 | asection *sec; |
| 2383 | fragS *fragp; |
| 2384 | { |
| 2385 | abort (); |
| 2386 | } |
| 2387 | |
| 2388 | /* We have no need to default values of symbols. */ |
| 2389 | |
| 2390 | /*ARGSUSED*/ |
| 2391 | symbolS * |
| 2392 | md_undefined_symbol (name) |
| 2393 | char *name; |
| 2394 | { |
| 2395 | return 0; |
| 2396 | } |
| 2397 | \f |
| 2398 | /* Functions concerning relocs. */ |
| 2399 | |
| 2400 | /* The location from which a PC relative jump should be calculated, |
| 2401 | given a PC relative reloc. */ |
| 2402 | |
| 2403 | long |
| 2404 | md_pcrel_from (fixp) |
| 2405 | fixS *fixp; |
| 2406 | { |
| 2407 | #ifdef OBJ_ELF |
| 2408 | if (fixp->fx_addsy != (symbolS *) NULL |
| 2409 | && ! S_IS_DEFINED (fixp->fx_addsy)) |
| 2410 | return 0; |
| 2411 | #endif |
| 2412 | |
| 2413 | return fixp->fx_frag->fr_address + fixp->fx_where; |
| 2414 | } |
| 2415 | |
| 2416 | #ifdef OBJ_COFF |
| 2417 | |
| 2418 | /* This is called to see whether a fixup should be adjusted to use a |
| 2419 | section symbol. We take the opportunity to change a fixup against |
| 2420 | a symbol in the TOC subsegment into a reloc against the |
| 2421 | corresponding .tc symbol. */ |
| 2422 | |
| 2423 | int |
| 2424 | ppc_fix_adjustable (fix) |
| 2425 | fixS *fix; |
| 2426 | { |
| 2427 | valueT val; |
| 2428 | |
| 2429 | resolve_symbol_value (fix->fx_addsy); |
| 2430 | val = S_GET_VALUE (fix->fx_addsy); |
| 2431 | if (ppc_toc_csect != (symbolS *) NULL |
| 2432 | && fix->fx_addsy != (symbolS *) NULL |
| 2433 | && fix->fx_addsy != ppc_toc_csect |
| 2434 | && S_GET_SEGMENT (fix->fx_addsy) == data_section |
| 2435 | && val >= ppc_toc_frag->fr_address |
| 2436 | && (ppc_after_toc_frag == (fragS *) NULL |
| 2437 | || val < ppc_after_toc_frag->fr_address)) |
| 2438 | { |
| 2439 | symbolS *sy; |
| 2440 | |
| 2441 | for (sy = symbol_next (ppc_toc_csect); |
| 2442 | sy != (symbolS *) NULL; |
| 2443 | sy = symbol_next (sy)) |
| 2444 | { |
| 2445 | if (sy->sy_tc.class == XMC_TC0) |
| 2446 | continue; |
| 2447 | if (sy->sy_tc.class != XMC_TC) |
| 2448 | break; |
| 2449 | resolve_symbol_value (sy); |
| 2450 | if (val == S_GET_VALUE (sy)) |
| 2451 | { |
| 2452 | fix->fx_addsy = sy; |
| 2453 | fix->fx_addnumber = val - ppc_toc_frag->fr_address; |
| 2454 | return 0; |
| 2455 | } |
| 2456 | } |
| 2457 | |
| 2458 | as_bad_where (fix->fx_file, fix->fx_line, |
| 2459 | "symbol in .toc does not match any .tc"); |
| 2460 | } |
| 2461 | |
| 2462 | /* Possibly adjust the reloc to be against the csect. */ |
| 2463 | if (fix->fx_addsy != (symbolS *) NULL |
| 2464 | && fix->fx_addsy->sy_tc.subseg == 0 |
| 2465 | && fix->fx_addsy->sy_tc.class != XMC_TC0 |
| 2466 | && fix->fx_addsy->sy_tc.class != XMC_TC |
| 2467 | && S_GET_SEGMENT (fix->fx_addsy) != bss_section) |
| 2468 | { |
| 2469 | symbolS *csect; |
| 2470 | |
| 2471 | if (S_GET_SEGMENT (fix->fx_addsy) == text_section) |
| 2472 | csect = ppc_text_csects; |
| 2473 | else if (S_GET_SEGMENT (fix->fx_addsy) == data_section) |
| 2474 | csect = ppc_data_csects; |
| 2475 | else |
| 2476 | abort (); |
| 2477 | |
| 2478 | /* Skip the initial dummy symbol. */ |
| 2479 | csect = csect->sy_tc.next; |
| 2480 | |
| 2481 | if (csect != (symbolS *) NULL) |
| 2482 | { |
| 2483 | while (csect->sy_tc.next != (symbolS *) NULL |
| 2484 | && (csect->sy_tc.next->sy_frag->fr_address |
| 2485 | <= fix->fx_addsy->sy_frag->fr_address)) |
| 2486 | csect = csect->sy_tc.next; |
| 2487 | |
| 2488 | fix->fx_offset += (S_GET_VALUE (fix->fx_addsy) |
| 2489 | - csect->sy_frag->fr_address); |
| 2490 | fix->fx_addsy = csect; |
| 2491 | } |
| 2492 | } |
| 2493 | |
| 2494 | /* Adjust a reloc against a .lcomm symbol to be against the base |
| 2495 | .lcomm. */ |
| 2496 | if (fix->fx_addsy != (symbolS *) NULL |
| 2497 | && S_GET_SEGMENT (fix->fx_addsy) == bss_section |
| 2498 | && ! S_IS_EXTERNAL (fix->fx_addsy)) |
| 2499 | { |
| 2500 | resolve_symbol_value (fix->fx_addsy->sy_frag->fr_symbol); |
| 2501 | fix->fx_offset += (S_GET_VALUE (fix->fx_addsy) |
| 2502 | - S_GET_VALUE (fix->fx_addsy->sy_frag->fr_symbol)); |
| 2503 | fix->fx_addsy = fix->fx_addsy->sy_frag->fr_symbol; |
| 2504 | } |
| 2505 | |
| 2506 | return 0; |
| 2507 | } |
| 2508 | |
| 2509 | #endif |
| 2510 | |
| 2511 | /* See whether a symbol is in the TOC section. */ |
| 2512 | |
| 2513 | static int |
| 2514 | ppc_is_toc_sym (sym) |
| 2515 | symbolS *sym; |
| 2516 | { |
| 2517 | #ifdef OBJ_COFF |
| 2518 | return sym->sy_tc.class == XMC_TC; |
| 2519 | #else |
| 2520 | return strcmp (segment_name (S_GET_SEGMENT (sym)), ".got") == 0; |
| 2521 | #endif |
| 2522 | } |
| 2523 | |
| 2524 | /* Apply a fixup to the object code. This is called for all the |
| 2525 | fixups we generated by the call to fix_new_exp, above. In the call |
| 2526 | above we used a reloc code which was the largest legal reloc code |
| 2527 | plus the operand index. Here we undo that to recover the operand |
| 2528 | index. At this point all symbol values should be fully resolved, |
| 2529 | and we attempt to completely resolve the reloc. If we can not do |
| 2530 | that, we determine the correct reloc code and put it back in the |
| 2531 | fixup. */ |
| 2532 | |
| 2533 | int |
| 2534 | md_apply_fix3 (fixp, valuep, seg) |
| 2535 | fixS *fixp; |
| 2536 | valueT *valuep; |
| 2537 | segT seg; |
| 2538 | { |
| 2539 | valueT value; |
| 2540 | |
| 2541 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes |
| 2542 | the symbol values. Since we are using BFD_ASSEMBLER, if we are |
| 2543 | doing this relocation the code in write.c is going to call |
| 2544 | bfd_perform_relocation, which is also going to use the symbol |
| 2545 | value. That means that if the reloc is fully resolved we want to |
| 2546 | use *valuep since bfd_perform_relocation is not being used. |
| 2547 | However, if the reloc is not fully resolved we do not want to use |
| 2548 | *valuep, and must use fx_offset instead. However, if the reloc |
| 2549 | is PC relative, we do want to use *valuep since it includes the |
| 2550 | result of md_pcrel_from. This is confusing. */ |
| 2551 | |
| 2552 | if (fixp->fx_addsy == (symbolS *) NULL) |
| 2553 | { |
| 2554 | value = *valuep; |
| 2555 | fixp->fx_done = 1; |
| 2556 | } |
| 2557 | else if (fixp->fx_pcrel) |
| 2558 | value = *valuep; |
| 2559 | else |
| 2560 | { |
| 2561 | value = fixp->fx_offset; |
| 2562 | if (fixp->fx_subsy != (symbolS *) NULL) |
| 2563 | { |
| 2564 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) |
| 2565 | value -= S_GET_VALUE (fixp->fx_subsy); |
| 2566 | else |
| 2567 | { |
| 2568 | /* We can't actually support subtracting a symbol. */ |
| 2569 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 2570 | "expression too complex"); |
| 2571 | } |
| 2572 | } |
| 2573 | } |
| 2574 | |
| 2575 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) |
| 2576 | { |
| 2577 | int opindex; |
| 2578 | const struct powerpc_operand *operand; |
| 2579 | char *where; |
| 2580 | unsigned long insn; |
| 2581 | |
| 2582 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; |
| 2583 | |
| 2584 | operand = &powerpc_operands[opindex]; |
| 2585 | |
| 2586 | #ifdef OBJ_COFF |
| 2587 | /* It appears that an instruction like |
| 2588 | l 9,LC..1(30) |
| 2589 | when LC..1 is not a TOC symbol does not generate a reloc. It |
| 2590 | uses the offset of LC..1 within its csect. However, .long |
| 2591 | LC..1 will generate a reloc. I can't find any documentation |
| 2592 | on how these cases are to be distinguished, so this is a wild |
| 2593 | guess. These cases are generated by gcc -mminimal-toc. */ |
| 2594 | if ((operand->flags & PPC_OPERAND_PARENS) != 0 |
| 2595 | && operand->bits == 16 |
| 2596 | && operand->shift == 0 |
| 2597 | && operand->insert == NULL |
| 2598 | && fixp->fx_addsy != NULL |
| 2599 | && fixp->fx_addsy->sy_tc.subseg != 0 |
| 2600 | && fixp->fx_addsy->sy_tc.class != XMC_TC |
| 2601 | && fixp->fx_addsy->sy_tc.class != XMC_TC0 |
| 2602 | && S_GET_SEGMENT (fixp->fx_addsy) != bss_section) |
| 2603 | { |
| 2604 | value = fixp->fx_offset; |
| 2605 | fixp->fx_done = 1; |
| 2606 | } |
| 2607 | #endif |
| 2608 | |
| 2609 | /* Fetch the instruction, insert the fully resolved operand |
| 2610 | value, and stuff the instruction back again. */ |
| 2611 | where = fixp->fx_frag->fr_literal + fixp->fx_where; |
| 2612 | if (ppc_big_endian) |
| 2613 | insn = bfd_getb32 ((unsigned char *) where); |
| 2614 | else |
| 2615 | insn = bfd_getl32 ((unsigned char *) where); |
| 2616 | insn = ppc_insert_operand (insn, operand, (offsetT) value, |
| 2617 | fixp->fx_file, fixp->fx_line); |
| 2618 | if (ppc_big_endian) |
| 2619 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); |
| 2620 | else |
| 2621 | bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); |
| 2622 | |
| 2623 | if (fixp->fx_done) |
| 2624 | { |
| 2625 | /* Nothing else to do here. */ |
| 2626 | return 1; |
| 2627 | } |
| 2628 | |
| 2629 | /* Determine a BFD reloc value based on the operand information. |
| 2630 | We are only prepared to turn a few of the operands into |
| 2631 | relocs. |
| 2632 | FIXME: We need to handle the DS field at the very least. |
| 2633 | FIXME: Handling 16 bit branches would also be reasonable. |
| 2634 | FIXME: Selecting the reloc type is a bit haphazard; perhaps |
| 2635 | there should be a new field in the operand table. */ |
| 2636 | if ((operand->flags & PPC_OPERAND_RELATIVE) != 0 |
| 2637 | && operand->bits == 26 |
| 2638 | && operand->shift == 0) |
| 2639 | fixp->fx_r_type = BFD_RELOC_PPC_B26; |
| 2640 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0 |
| 2641 | && operand->bits == 26 |
| 2642 | && operand->shift == 0) |
| 2643 | fixp->fx_r_type = BFD_RELOC_PPC_BA26; |
| 2644 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0 |
| 2645 | && operand->bits == 16 |
| 2646 | && operand->shift == 0 |
| 2647 | && operand->insert == NULL |
| 2648 | && fixp->fx_addsy != NULL |
| 2649 | && ppc_is_toc_sym (fixp->fx_addsy)) |
| 2650 | { |
| 2651 | fixp->fx_size = 2; |
| 2652 | if (ppc_big_endian) |
| 2653 | fixp->fx_where += 2; |
| 2654 | fixp->fx_r_type = BFD_RELOC_PPC_TOC16; |
| 2655 | } |
| 2656 | else |
| 2657 | { |
| 2658 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 2659 | "unresolved expression that must be resolved"); |
| 2660 | fixp->fx_done = 1; |
| 2661 | return 1; |
| 2662 | } |
| 2663 | } |
| 2664 | else |
| 2665 | { |
| 2666 | #ifdef OBJ_ELF |
| 2667 | ppc_elf_validate_fix (fixp, seg); |
| 2668 | #endif |
| 2669 | switch (fixp->fx_r_type) |
| 2670 | { |
| 2671 | case BFD_RELOC_32: |
| 2672 | if (fixp->fx_pcrel) |
| 2673 | { |
| 2674 | fixp->fx_r_type = BFD_RELOC_32_PCREL; |
| 2675 | value += fixp->fx_frag->fr_address + fixp->fx_where; |
| 2676 | } /* fall through */ |
| 2677 | |
| 2678 | case BFD_RELOC_32_PCREL: |
| 2679 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, |
| 2680 | value, 4); |
| 2681 | break; |
| 2682 | case BFD_RELOC_LO16: |
| 2683 | case BFD_RELOC_HI16: |
| 2684 | case BFD_RELOC_HI16_S: |
| 2685 | case BFD_RELOC_PPC_TOC16: |
| 2686 | case BFD_RELOC_16: |
| 2687 | if (fixp->fx_pcrel) |
| 2688 | abort (); |
| 2689 | |
| 2690 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, |
| 2691 | value, 2); |
| 2692 | break; |
| 2693 | |
| 2694 | case BFD_RELOC_8: |
| 2695 | if (fixp->fx_pcrel) |
| 2696 | abort (); |
| 2697 | |
| 2698 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, |
| 2699 | value, 1); |
| 2700 | break; |
| 2701 | default: |
| 2702 | abort (); |
| 2703 | } |
| 2704 | } |
| 2705 | |
| 2706 | #ifdef OBJ_ELF |
| 2707 | fixp->fx_addnumber = value; |
| 2708 | #else |
| 2709 | if (fixp->fx_r_type != BFD_RELOC_PPC_TOC16) |
| 2710 | fixp->fx_addnumber = 0; |
| 2711 | else |
| 2712 | { |
| 2713 | /* We want to use the offset within the data segment of the |
| 2714 | symbol, not the actual VMA of the symbol. */ |
| 2715 | fixp->fx_addnumber = |
| 2716 | - bfd_get_section_vma (stdoutput, S_GET_SEGMENT (fixp->fx_addsy)); |
| 2717 | } |
| 2718 | #endif |
| 2719 | |
| 2720 | return 1; |
| 2721 | } |
| 2722 | |
| 2723 | /* Generate a reloc for a fixup. */ |
| 2724 | |
| 2725 | arelent * |
| 2726 | tc_gen_reloc (seg, fixp) |
| 2727 | asection *seg; |
| 2728 | fixS *fixp; |
| 2729 | { |
| 2730 | arelent *reloc; |
| 2731 | |
| 2732 | reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent)); |
| 2733 | |
| 2734 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; |
| 2735 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 2736 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 2737 | if (reloc->howto == (reloc_howto_type *) NULL) |
| 2738 | { |
| 2739 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 2740 | "reloc %d not supported by object file format", (int)fixp->fx_r_type); |
| 2741 | return NULL; |
| 2742 | } |
| 2743 | reloc->addend = fixp->fx_addnumber; |
| 2744 | |
| 2745 | return reloc; |
| 2746 | } |