| 1 | /* This is the Assembler Pre-Processor |
| 2 | Copyright 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
| 3 | 1999, 2000, 2001, 2002, 2003, 2006, 2007 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GAS, the GNU Assembler. |
| 7 | |
| 8 | GAS is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3, or (at your option) |
| 11 | any later version. |
| 12 | |
| 13 | GAS is distributed in the hope that it will be useful, but WITHOUT |
| 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 16 | License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with GAS; see the file COPYING. If not, write to the Free |
| 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 21 | 02110-1301, USA. */ |
| 22 | |
| 23 | /* Modified by Allen Wirfs-Brock, Instantiations Inc 2/90. */ |
| 24 | /* App, the assembler pre-processor. This pre-processor strips out |
| 25 | excess spaces, turns single-quoted characters into a decimal |
| 26 | constant, and turns the # in # <number> <filename> <garbage> into a |
| 27 | .linefile. This needs better error-handling. */ |
| 28 | |
| 29 | #include "as.h" |
| 30 | |
| 31 | #if (__STDC__ != 1) |
| 32 | #ifndef const |
| 33 | #define const /* empty */ |
| 34 | #endif |
| 35 | #endif |
| 36 | |
| 37 | #ifdef H_TICK_HEX |
| 38 | int enable_h_tick_hex = 0; |
| 39 | #endif |
| 40 | |
| 41 | #ifdef TC_M68K |
| 42 | /* Whether we are scrubbing in m68k MRI mode. This is different from |
| 43 | flag_m68k_mri, because the two flags will be affected by the .mri |
| 44 | pseudo-op at different times. */ |
| 45 | static int scrub_m68k_mri; |
| 46 | |
| 47 | /* The pseudo-op which switches in and out of MRI mode. See the |
| 48 | comment in do_scrub_chars. */ |
| 49 | static const char mri_pseudo[] = ".mri 0"; |
| 50 | #else |
| 51 | #define scrub_m68k_mri 0 |
| 52 | #endif |
| 53 | |
| 54 | #if defined TC_ARM && defined OBJ_ELF |
| 55 | /* The pseudo-op for which we need to special-case `@' characters. |
| 56 | See the comment in do_scrub_chars. */ |
| 57 | static const char symver_pseudo[] = ".symver"; |
| 58 | static const char * symver_state; |
| 59 | #endif |
| 60 | |
| 61 | static char lex[256]; |
| 62 | static const char symbol_chars[] = |
| 63 | "$._ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; |
| 64 | |
| 65 | #define LEX_IS_SYMBOL_COMPONENT 1 |
| 66 | #define LEX_IS_WHITESPACE 2 |
| 67 | #define LEX_IS_LINE_SEPARATOR 3 |
| 68 | #define LEX_IS_COMMENT_START 4 |
| 69 | #define LEX_IS_LINE_COMMENT_START 5 |
| 70 | #define LEX_IS_TWOCHAR_COMMENT_1ST 6 |
| 71 | #define LEX_IS_STRINGQUOTE 8 |
| 72 | #define LEX_IS_COLON 9 |
| 73 | #define LEX_IS_NEWLINE 10 |
| 74 | #define LEX_IS_ONECHAR_QUOTE 11 |
| 75 | #ifdef TC_V850 |
| 76 | #define LEX_IS_DOUBLEDASH_1ST 12 |
| 77 | #endif |
| 78 | #ifdef TC_M32R |
| 79 | #define DOUBLEBAR_PARALLEL |
| 80 | #endif |
| 81 | #ifdef DOUBLEBAR_PARALLEL |
| 82 | #define LEX_IS_DOUBLEBAR_1ST 13 |
| 83 | #endif |
| 84 | #define LEX_IS_PARALLEL_SEPARATOR 14 |
| 85 | #ifdef H_TICK_HEX |
| 86 | #define LEX_IS_H 15 |
| 87 | #endif |
| 88 | #define IS_SYMBOL_COMPONENT(c) (lex[c] == LEX_IS_SYMBOL_COMPONENT) |
| 89 | #define IS_WHITESPACE(c) (lex[c] == LEX_IS_WHITESPACE) |
| 90 | #define IS_LINE_SEPARATOR(c) (lex[c] == LEX_IS_LINE_SEPARATOR) |
| 91 | #define IS_PARALLEL_SEPARATOR(c) (lex[c] == LEX_IS_PARALLEL_SEPARATOR) |
| 92 | #define IS_COMMENT(c) (lex[c] == LEX_IS_COMMENT_START) |
| 93 | #define IS_LINE_COMMENT(c) (lex[c] == LEX_IS_LINE_COMMENT_START) |
| 94 | #define IS_NEWLINE(c) (lex[c] == LEX_IS_NEWLINE) |
| 95 | |
| 96 | static int process_escape (int); |
| 97 | |
| 98 | /* FIXME-soon: The entire lexer/parser thingy should be |
| 99 | built statically at compile time rather than dynamically |
| 100 | each and every time the assembler is run. xoxorich. */ |
| 101 | |
| 102 | void |
| 103 | do_scrub_begin (int m68k_mri ATTRIBUTE_UNUSED) |
| 104 | { |
| 105 | const char *p; |
| 106 | int c; |
| 107 | |
| 108 | lex[' '] = LEX_IS_WHITESPACE; |
| 109 | lex['\t'] = LEX_IS_WHITESPACE; |
| 110 | lex['\r'] = LEX_IS_WHITESPACE; |
| 111 | lex['\n'] = LEX_IS_NEWLINE; |
| 112 | lex[':'] = LEX_IS_COLON; |
| 113 | |
| 114 | #ifdef TC_M68K |
| 115 | scrub_m68k_mri = m68k_mri; |
| 116 | |
| 117 | if (! m68k_mri) |
| 118 | #endif |
| 119 | { |
| 120 | lex['"'] = LEX_IS_STRINGQUOTE; |
| 121 | |
| 122 | #if ! defined (TC_HPPA) && ! defined (TC_I370) |
| 123 | /* I370 uses single-quotes to delimit integer, float constants. */ |
| 124 | lex['\''] = LEX_IS_ONECHAR_QUOTE; |
| 125 | #endif |
| 126 | |
| 127 | #ifdef SINGLE_QUOTE_STRINGS |
| 128 | lex['\''] = LEX_IS_STRINGQUOTE; |
| 129 | #endif |
| 130 | } |
| 131 | |
| 132 | /* Note: if any other character can be LEX_IS_STRINGQUOTE, the loop |
| 133 | in state 5 of do_scrub_chars must be changed. */ |
| 134 | |
| 135 | /* Note that these override the previous defaults, e.g. if ';' is a |
| 136 | comment char, then it isn't a line separator. */ |
| 137 | for (p = symbol_chars; *p; ++p) |
| 138 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
| 139 | |
| 140 | for (c = 128; c < 256; ++c) |
| 141 | lex[c] = LEX_IS_SYMBOL_COMPONENT; |
| 142 | |
| 143 | #ifdef tc_symbol_chars |
| 144 | /* This macro permits the processor to specify all characters which |
| 145 | may appears in an operand. This will prevent the scrubber from |
| 146 | discarding meaningful whitespace in certain cases. The i386 |
| 147 | backend uses this to support prefixes, which can confuse the |
| 148 | scrubber as to whether it is parsing operands or opcodes. */ |
| 149 | for (p = tc_symbol_chars; *p; ++p) |
| 150 | lex[(unsigned char) *p] = LEX_IS_SYMBOL_COMPONENT; |
| 151 | #endif |
| 152 | |
| 153 | /* The m68k backend wants to be able to change comment_chars. */ |
| 154 | #ifndef tc_comment_chars |
| 155 | #define tc_comment_chars comment_chars |
| 156 | #endif |
| 157 | for (p = tc_comment_chars; *p; p++) |
| 158 | lex[(unsigned char) *p] = LEX_IS_COMMENT_START; |
| 159 | |
| 160 | for (p = line_comment_chars; *p; p++) |
| 161 | lex[(unsigned char) *p] = LEX_IS_LINE_COMMENT_START; |
| 162 | |
| 163 | for (p = line_separator_chars; *p; p++) |
| 164 | lex[(unsigned char) *p] = LEX_IS_LINE_SEPARATOR; |
| 165 | |
| 166 | #ifdef tc_parallel_separator_chars |
| 167 | /* This macro permits the processor to specify all characters which |
| 168 | separate parallel insns on the same line. */ |
| 169 | for (p = tc_parallel_separator_chars; *p; p++) |
| 170 | lex[(unsigned char) *p] = LEX_IS_PARALLEL_SEPARATOR; |
| 171 | #endif |
| 172 | |
| 173 | /* Only allow slash-star comments if slash is not in use. |
| 174 | FIXME: This isn't right. We should always permit them. */ |
| 175 | if (lex['/'] == 0) |
| 176 | lex['/'] = LEX_IS_TWOCHAR_COMMENT_1ST; |
| 177 | |
| 178 | #ifdef TC_M68K |
| 179 | if (m68k_mri) |
| 180 | { |
| 181 | lex['\''] = LEX_IS_STRINGQUOTE; |
| 182 | lex[';'] = LEX_IS_COMMENT_START; |
| 183 | lex['*'] = LEX_IS_LINE_COMMENT_START; |
| 184 | /* The MRI documentation says '!' is LEX_IS_COMMENT_START, but |
| 185 | then it can't be used in an expression. */ |
| 186 | lex['!'] = LEX_IS_LINE_COMMENT_START; |
| 187 | } |
| 188 | #endif |
| 189 | |
| 190 | #ifdef TC_V850 |
| 191 | lex['-'] = LEX_IS_DOUBLEDASH_1ST; |
| 192 | #endif |
| 193 | #ifdef DOUBLEBAR_PARALLEL |
| 194 | lex['|'] = LEX_IS_DOUBLEBAR_1ST; |
| 195 | #endif |
| 196 | #ifdef TC_D30V |
| 197 | /* Must do this is we want VLIW instruction with "->" or "<-". */ |
| 198 | lex['-'] = LEX_IS_SYMBOL_COMPONENT; |
| 199 | #endif |
| 200 | |
| 201 | #ifdef H_TICK_HEX |
| 202 | if (enable_h_tick_hex) |
| 203 | { |
| 204 | lex['h'] = LEX_IS_H; |
| 205 | lex['H'] = LEX_IS_H; |
| 206 | } |
| 207 | #endif |
| 208 | } |
| 209 | |
| 210 | /* Saved state of the scrubber. */ |
| 211 | static int state; |
| 212 | static int old_state; |
| 213 | static char *out_string; |
| 214 | static char out_buf[20]; |
| 215 | static int add_newlines; |
| 216 | static char *saved_input; |
| 217 | static int saved_input_len; |
| 218 | static char input_buffer[32 * 1024]; |
| 219 | static const char *mri_state; |
| 220 | static char mri_last_ch; |
| 221 | |
| 222 | /* Data structure for saving the state of app across #include's. Note that |
| 223 | app is called asynchronously to the parsing of the .include's, so our |
| 224 | state at the time .include is interpreted is completely unrelated. |
| 225 | That's why we have to save it all. */ |
| 226 | |
| 227 | struct app_save |
| 228 | { |
| 229 | int state; |
| 230 | int old_state; |
| 231 | char * out_string; |
| 232 | char out_buf[sizeof (out_buf)]; |
| 233 | int add_newlines; |
| 234 | char * saved_input; |
| 235 | int saved_input_len; |
| 236 | #ifdef TC_M68K |
| 237 | int scrub_m68k_mri; |
| 238 | #endif |
| 239 | const char * mri_state; |
| 240 | char mri_last_ch; |
| 241 | #if defined TC_ARM && defined OBJ_ELF |
| 242 | const char * symver_state; |
| 243 | #endif |
| 244 | }; |
| 245 | |
| 246 | char * |
| 247 | app_push (void) |
| 248 | { |
| 249 | register struct app_save *saved; |
| 250 | |
| 251 | saved = (struct app_save *) xmalloc (sizeof (*saved)); |
| 252 | saved->state = state; |
| 253 | saved->old_state = old_state; |
| 254 | saved->out_string = out_string; |
| 255 | memcpy (saved->out_buf, out_buf, sizeof (out_buf)); |
| 256 | saved->add_newlines = add_newlines; |
| 257 | if (saved_input == NULL) |
| 258 | saved->saved_input = NULL; |
| 259 | else |
| 260 | { |
| 261 | saved->saved_input = xmalloc (saved_input_len); |
| 262 | memcpy (saved->saved_input, saved_input, saved_input_len); |
| 263 | saved->saved_input_len = saved_input_len; |
| 264 | } |
| 265 | #ifdef TC_M68K |
| 266 | saved->scrub_m68k_mri = scrub_m68k_mri; |
| 267 | #endif |
| 268 | saved->mri_state = mri_state; |
| 269 | saved->mri_last_ch = mri_last_ch; |
| 270 | #if defined TC_ARM && defined OBJ_ELF |
| 271 | saved->symver_state = symver_state; |
| 272 | #endif |
| 273 | |
| 274 | /* do_scrub_begin() is not useful, just wastes time. */ |
| 275 | |
| 276 | state = 0; |
| 277 | saved_input = NULL; |
| 278 | |
| 279 | return (char *) saved; |
| 280 | } |
| 281 | |
| 282 | void |
| 283 | app_pop (char *arg) |
| 284 | { |
| 285 | register struct app_save *saved = (struct app_save *) arg; |
| 286 | |
| 287 | /* There is no do_scrub_end (). */ |
| 288 | state = saved->state; |
| 289 | old_state = saved->old_state; |
| 290 | out_string = saved->out_string; |
| 291 | memcpy (out_buf, saved->out_buf, sizeof (out_buf)); |
| 292 | add_newlines = saved->add_newlines; |
| 293 | if (saved->saved_input == NULL) |
| 294 | saved_input = NULL; |
| 295 | else |
| 296 | { |
| 297 | assert (saved->saved_input_len <= (int) (sizeof input_buffer)); |
| 298 | memcpy (input_buffer, saved->saved_input, saved->saved_input_len); |
| 299 | saved_input = input_buffer; |
| 300 | saved_input_len = saved->saved_input_len; |
| 301 | free (saved->saved_input); |
| 302 | } |
| 303 | #ifdef TC_M68K |
| 304 | scrub_m68k_mri = saved->scrub_m68k_mri; |
| 305 | #endif |
| 306 | mri_state = saved->mri_state; |
| 307 | mri_last_ch = saved->mri_last_ch; |
| 308 | #if defined TC_ARM && defined OBJ_ELF |
| 309 | symver_state = saved->symver_state; |
| 310 | #endif |
| 311 | |
| 312 | free (arg); |
| 313 | } |
| 314 | |
| 315 | /* @@ This assumes that \n &c are the same on host and target. This is not |
| 316 | necessarily true. */ |
| 317 | |
| 318 | static int |
| 319 | process_escape (int ch) |
| 320 | { |
| 321 | switch (ch) |
| 322 | { |
| 323 | case 'b': |
| 324 | return '\b'; |
| 325 | case 'f': |
| 326 | return '\f'; |
| 327 | case 'n': |
| 328 | return '\n'; |
| 329 | case 'r': |
| 330 | return '\r'; |
| 331 | case 't': |
| 332 | return '\t'; |
| 333 | case '\'': |
| 334 | return '\''; |
| 335 | case '"': |
| 336 | return '\"'; |
| 337 | default: |
| 338 | return ch; |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | /* This function is called to process input characters. The GET |
| 343 | parameter is used to retrieve more input characters. GET should |
| 344 | set its parameter to point to a buffer, and return the length of |
| 345 | the buffer; it should return 0 at end of file. The scrubbed output |
| 346 | characters are put into the buffer starting at TOSTART; the TOSTART |
| 347 | buffer is TOLEN bytes in length. The function returns the number |
| 348 | of scrubbed characters put into TOSTART. This will be TOLEN unless |
| 349 | end of file was seen. This function is arranged as a state |
| 350 | machine, and saves its state so that it may return at any point. |
| 351 | This is the way the old code used to work. */ |
| 352 | |
| 353 | int |
| 354 | do_scrub_chars (int (*get) (char *, int), char *tostart, int tolen) |
| 355 | { |
| 356 | char *to = tostart; |
| 357 | char *toend = tostart + tolen; |
| 358 | char *from; |
| 359 | char *fromend; |
| 360 | int fromlen; |
| 361 | register int ch, ch2 = 0; |
| 362 | /* Character that started the string we're working on. */ |
| 363 | static char quotechar; |
| 364 | |
| 365 | /*State 0: beginning of normal line |
| 366 | 1: After first whitespace on line (flush more white) |
| 367 | 2: After first non-white (opcode) on line (keep 1white) |
| 368 | 3: after second white on line (into operands) (flush white) |
| 369 | 4: after putting out a .linefile, put out digits |
| 370 | 5: parsing a string, then go to old-state |
| 371 | 6: putting out \ escape in a "d string. |
| 372 | 7: no longer used |
| 373 | 8: no longer used |
| 374 | 9: After seeing symbol char in state 3 (keep 1white after symchar) |
| 375 | 10: After seeing whitespace in state 9 (keep white before symchar) |
| 376 | 11: After seeing a symbol character in state 0 (eg a label definition) |
| 377 | -1: output string in out_string and go to the state in old_state |
| 378 | -2: flush text until a '*' '/' is seen, then go to state old_state |
| 379 | #ifdef TC_V850 |
| 380 | 12: After seeing a dash, looking for a second dash as a start |
| 381 | of comment. |
| 382 | #endif |
| 383 | #ifdef DOUBLEBAR_PARALLEL |
| 384 | 13: After seeing a vertical bar, looking for a second |
| 385 | vertical bar as a parallel expression separator. |
| 386 | #endif |
| 387 | #ifdef TC_IA64 |
| 388 | 14: After seeing a `(' at state 0, looking for a `)' as |
| 389 | predicate. |
| 390 | 15: After seeing a `(' at state 1, looking for a `)' as |
| 391 | predicate. |
| 392 | #endif |
| 393 | #ifdef TC_Z80 |
| 394 | 16: After seeing an 'a' or an 'A' at the start of a symbol |
| 395 | 17: After seeing an 'f' or an 'F' in state 16 |
| 396 | #endif |
| 397 | */ |
| 398 | |
| 399 | /* I added states 9 and 10 because the MIPS ECOFF assembler uses |
| 400 | constructs like ``.loc 1 20''. This was turning into ``.loc |
| 401 | 120''. States 9 and 10 ensure that a space is never dropped in |
| 402 | between characters which could appear in an identifier. Ian |
| 403 | Taylor, ian@cygnus.com. |
| 404 | |
| 405 | I added state 11 so that something like "Lfoo add %r25,%r26,%r27" works |
| 406 | correctly on the PA (and any other target where colons are optional). |
| 407 | Jeff Law, law@cs.utah.edu. |
| 408 | |
| 409 | I added state 13 so that something like "cmp r1, r2 || trap #1" does not |
| 410 | get squashed into "cmp r1,r2||trap#1", with the all important space |
| 411 | between the 'trap' and the '#1' being eliminated. nickc@cygnus.com */ |
| 412 | |
| 413 | /* This macro gets the next input character. */ |
| 414 | |
| 415 | #define GET() \ |
| 416 | (from < fromend \ |
| 417 | ? * (unsigned char *) (from++) \ |
| 418 | : (saved_input = NULL, \ |
| 419 | fromlen = (*get) (input_buffer, sizeof input_buffer), \ |
| 420 | from = input_buffer, \ |
| 421 | fromend = from + fromlen, \ |
| 422 | (fromlen == 0 \ |
| 423 | ? EOF \ |
| 424 | : * (unsigned char *) (from++)))) |
| 425 | |
| 426 | /* This macro pushes a character back on the input stream. */ |
| 427 | |
| 428 | #define UNGET(uch) (*--from = (uch)) |
| 429 | |
| 430 | /* This macro puts a character into the output buffer. If this |
| 431 | character fills the output buffer, this macro jumps to the label |
| 432 | TOFULL. We use this rather ugly approach because we need to |
| 433 | handle two different termination conditions: EOF on the input |
| 434 | stream, and a full output buffer. It would be simpler if we |
| 435 | always read in the entire input stream before processing it, but |
| 436 | I don't want to make such a significant change to the assembler's |
| 437 | memory usage. */ |
| 438 | |
| 439 | #define PUT(pch) \ |
| 440 | do \ |
| 441 | { \ |
| 442 | *to++ = (pch); \ |
| 443 | if (to >= toend) \ |
| 444 | goto tofull; \ |
| 445 | } \ |
| 446 | while (0) |
| 447 | |
| 448 | if (saved_input != NULL) |
| 449 | { |
| 450 | from = saved_input; |
| 451 | fromend = from + saved_input_len; |
| 452 | } |
| 453 | else |
| 454 | { |
| 455 | fromlen = (*get) (input_buffer, sizeof input_buffer); |
| 456 | if (fromlen == 0) |
| 457 | return 0; |
| 458 | from = input_buffer; |
| 459 | fromend = from + fromlen; |
| 460 | } |
| 461 | |
| 462 | while (1) |
| 463 | { |
| 464 | /* The cases in this switch end with continue, in order to |
| 465 | branch back to the top of this while loop and generate the |
| 466 | next output character in the appropriate state. */ |
| 467 | switch (state) |
| 468 | { |
| 469 | case -1: |
| 470 | ch = *out_string++; |
| 471 | if (*out_string == '\0') |
| 472 | { |
| 473 | state = old_state; |
| 474 | old_state = 3; |
| 475 | } |
| 476 | PUT (ch); |
| 477 | continue; |
| 478 | |
| 479 | case -2: |
| 480 | for (;;) |
| 481 | { |
| 482 | do |
| 483 | { |
| 484 | ch = GET (); |
| 485 | |
| 486 | if (ch == EOF) |
| 487 | { |
| 488 | as_warn (_("end of file in comment")); |
| 489 | goto fromeof; |
| 490 | } |
| 491 | |
| 492 | if (ch == '\n') |
| 493 | PUT ('\n'); |
| 494 | } |
| 495 | while (ch != '*'); |
| 496 | |
| 497 | while ((ch = GET ()) == '*') |
| 498 | ; |
| 499 | |
| 500 | if (ch == EOF) |
| 501 | { |
| 502 | as_warn (_("end of file in comment")); |
| 503 | goto fromeof; |
| 504 | } |
| 505 | |
| 506 | if (ch == '/') |
| 507 | break; |
| 508 | |
| 509 | UNGET (ch); |
| 510 | } |
| 511 | |
| 512 | state = old_state; |
| 513 | UNGET (' '); |
| 514 | continue; |
| 515 | |
| 516 | case 4: |
| 517 | ch = GET (); |
| 518 | if (ch == EOF) |
| 519 | goto fromeof; |
| 520 | else if (ch >= '0' && ch <= '9') |
| 521 | PUT (ch); |
| 522 | else |
| 523 | { |
| 524 | while (ch != EOF && IS_WHITESPACE (ch)) |
| 525 | ch = GET (); |
| 526 | if (ch == '"') |
| 527 | { |
| 528 | quotechar = ch; |
| 529 | state = 5; |
| 530 | old_state = 3; |
| 531 | PUT (ch); |
| 532 | } |
| 533 | else |
| 534 | { |
| 535 | while (ch != EOF && ch != '\n') |
| 536 | ch = GET (); |
| 537 | state = 0; |
| 538 | PUT (ch); |
| 539 | } |
| 540 | } |
| 541 | continue; |
| 542 | |
| 543 | case 5: |
| 544 | /* We are going to copy everything up to a quote character, |
| 545 | with special handling for a backslash. We try to |
| 546 | optimize the copying in the simple case without using the |
| 547 | GET and PUT macros. */ |
| 548 | { |
| 549 | char *s; |
| 550 | int len; |
| 551 | |
| 552 | for (s = from; s < fromend; s++) |
| 553 | { |
| 554 | ch = *s; |
| 555 | if (ch == '\\' |
| 556 | || ch == quotechar |
| 557 | || ch == '\n') |
| 558 | break; |
| 559 | } |
| 560 | len = s - from; |
| 561 | if (len > toend - to) |
| 562 | len = toend - to; |
| 563 | if (len > 0) |
| 564 | { |
| 565 | memcpy (to, from, len); |
| 566 | to += len; |
| 567 | from += len; |
| 568 | if (to >= toend) |
| 569 | goto tofull; |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | ch = GET (); |
| 574 | if (ch == EOF) |
| 575 | { |
| 576 | /* This buffer is here specifically so |
| 577 | that the UNGET below will work. */ |
| 578 | static char one_char_buf[1]; |
| 579 | |
| 580 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
| 581 | state = old_state; |
| 582 | from = fromend = one_char_buf + 1; |
| 583 | fromlen = 1; |
| 584 | UNGET ('\n'); |
| 585 | PUT (quotechar); |
| 586 | } |
| 587 | else if (ch == quotechar) |
| 588 | { |
| 589 | state = old_state; |
| 590 | PUT (ch); |
| 591 | } |
| 592 | #ifndef NO_STRING_ESCAPES |
| 593 | else if (ch == '\\') |
| 594 | { |
| 595 | state = 6; |
| 596 | PUT (ch); |
| 597 | } |
| 598 | #endif |
| 599 | else if (scrub_m68k_mri && ch == '\n') |
| 600 | { |
| 601 | /* Just quietly terminate the string. This permits lines like |
| 602 | bne label loop if we haven't reach end yet. */ |
| 603 | state = old_state; |
| 604 | UNGET (ch); |
| 605 | PUT ('\''); |
| 606 | } |
| 607 | else |
| 608 | { |
| 609 | PUT (ch); |
| 610 | } |
| 611 | continue; |
| 612 | |
| 613 | case 6: |
| 614 | state = 5; |
| 615 | ch = GET (); |
| 616 | switch (ch) |
| 617 | { |
| 618 | /* Handle strings broken across lines, by turning '\n' into |
| 619 | '\\' and 'n'. */ |
| 620 | case '\n': |
| 621 | UNGET ('n'); |
| 622 | add_newlines++; |
| 623 | PUT ('\\'); |
| 624 | continue; |
| 625 | |
| 626 | case EOF: |
| 627 | as_warn (_("end of file in string; '%c' inserted"), quotechar); |
| 628 | PUT (quotechar); |
| 629 | continue; |
| 630 | |
| 631 | case '"': |
| 632 | case '\\': |
| 633 | case 'b': |
| 634 | case 'f': |
| 635 | case 'n': |
| 636 | case 'r': |
| 637 | case 't': |
| 638 | case 'v': |
| 639 | case 'x': |
| 640 | case 'X': |
| 641 | case '0': |
| 642 | case '1': |
| 643 | case '2': |
| 644 | case '3': |
| 645 | case '4': |
| 646 | case '5': |
| 647 | case '6': |
| 648 | case '7': |
| 649 | break; |
| 650 | |
| 651 | default: |
| 652 | #ifdef ONLY_STANDARD_ESCAPES |
| 653 | as_warn (_("unknown escape '\\%c' in string; ignored"), ch); |
| 654 | #endif |
| 655 | break; |
| 656 | } |
| 657 | PUT (ch); |
| 658 | continue; |
| 659 | |
| 660 | #ifdef DOUBLEBAR_PARALLEL |
| 661 | case 13: |
| 662 | ch = GET (); |
| 663 | if (ch != '|') |
| 664 | abort (); |
| 665 | |
| 666 | /* Reset back to state 1 and pretend that we are parsing a |
| 667 | line from just after the first white space. */ |
| 668 | state = 1; |
| 669 | PUT ('|'); |
| 670 | continue; |
| 671 | #endif |
| 672 | #ifdef TC_Z80 |
| 673 | case 16: |
| 674 | /* We have seen an 'a' at the start of a symbol, look for an 'f'. */ |
| 675 | ch = GET (); |
| 676 | if (ch == 'f' || ch == 'F') |
| 677 | { |
| 678 | state = 17; |
| 679 | PUT (ch); |
| 680 | } |
| 681 | else |
| 682 | { |
| 683 | state = 9; |
| 684 | break; |
| 685 | } |
| 686 | case 17: |
| 687 | /* We have seen "af" at the start of a symbol, |
| 688 | a ' here is a part of that symbol. */ |
| 689 | ch = GET (); |
| 690 | state = 9; |
| 691 | if (ch == '\'') |
| 692 | /* Change to avoid warning about unclosed string. */ |
| 693 | PUT ('`'); |
| 694 | else if (ch != EOF) |
| 695 | UNGET (ch); |
| 696 | break; |
| 697 | #endif |
| 698 | } |
| 699 | |
| 700 | /* OK, we are somewhere in states 0 through 4 or 9 through 11. */ |
| 701 | |
| 702 | /* flushchar: */ |
| 703 | ch = GET (); |
| 704 | |
| 705 | #ifdef TC_IA64 |
| 706 | if (ch == '(' && (state == 0 || state == 1)) |
| 707 | { |
| 708 | state += 14; |
| 709 | PUT (ch); |
| 710 | continue; |
| 711 | } |
| 712 | else if (state == 14 || state == 15) |
| 713 | { |
| 714 | if (ch == ')') |
| 715 | { |
| 716 | state -= 14; |
| 717 | PUT (ch); |
| 718 | ch = GET (); |
| 719 | } |
| 720 | else |
| 721 | { |
| 722 | PUT (ch); |
| 723 | continue; |
| 724 | } |
| 725 | } |
| 726 | #endif |
| 727 | |
| 728 | recycle: |
| 729 | |
| 730 | #if defined TC_ARM && defined OBJ_ELF |
| 731 | /* We need to watch out for .symver directives. See the comment later |
| 732 | in this function. */ |
| 733 | if (symver_state == NULL) |
| 734 | { |
| 735 | if ((state == 0 || state == 1) && ch == symver_pseudo[0]) |
| 736 | symver_state = symver_pseudo + 1; |
| 737 | } |
| 738 | else |
| 739 | { |
| 740 | /* We advance to the next state if we find the right |
| 741 | character. */ |
| 742 | if (ch != '\0' && (*symver_state == ch)) |
| 743 | ++symver_state; |
| 744 | else if (*symver_state != '\0') |
| 745 | /* We did not get the expected character, or we didn't |
| 746 | get a valid terminating character after seeing the |
| 747 | entire pseudo-op, so we must go back to the beginning. */ |
| 748 | symver_state = NULL; |
| 749 | else |
| 750 | { |
| 751 | /* We've read the entire pseudo-op. If this is the end |
| 752 | of the line, go back to the beginning. */ |
| 753 | if (IS_NEWLINE (ch)) |
| 754 | symver_state = NULL; |
| 755 | } |
| 756 | } |
| 757 | #endif /* TC_ARM && OBJ_ELF */ |
| 758 | |
| 759 | #ifdef TC_M68K |
| 760 | /* We want to have pseudo-ops which control whether we are in |
| 761 | MRI mode or not. Unfortunately, since m68k MRI mode affects |
| 762 | the scrubber, that means that we need a special purpose |
| 763 | recognizer here. */ |
| 764 | if (mri_state == NULL) |
| 765 | { |
| 766 | if ((state == 0 || state == 1) |
| 767 | && ch == mri_pseudo[0]) |
| 768 | mri_state = mri_pseudo + 1; |
| 769 | } |
| 770 | else |
| 771 | { |
| 772 | /* We advance to the next state if we find the right |
| 773 | character, or if we need a space character and we get any |
| 774 | whitespace character, or if we need a '0' and we get a |
| 775 | '1' (this is so that we only need one state to handle |
| 776 | ``.mri 0'' and ``.mri 1''). */ |
| 777 | if (ch != '\0' |
| 778 | && (*mri_state == ch |
| 779 | || (*mri_state == ' ' |
| 780 | && lex[ch] == LEX_IS_WHITESPACE) |
| 781 | || (*mri_state == '0' |
| 782 | && ch == '1'))) |
| 783 | { |
| 784 | mri_last_ch = ch; |
| 785 | ++mri_state; |
| 786 | } |
| 787 | else if (*mri_state != '\0' |
| 788 | || (lex[ch] != LEX_IS_WHITESPACE |
| 789 | && lex[ch] != LEX_IS_NEWLINE)) |
| 790 | { |
| 791 | /* We did not get the expected character, or we didn't |
| 792 | get a valid terminating character after seeing the |
| 793 | entire pseudo-op, so we must go back to the |
| 794 | beginning. */ |
| 795 | mri_state = NULL; |
| 796 | } |
| 797 | else |
| 798 | { |
| 799 | /* We've read the entire pseudo-op. mips_last_ch is |
| 800 | either '0' or '1' indicating whether to enter or |
| 801 | leave MRI mode. */ |
| 802 | do_scrub_begin (mri_last_ch == '1'); |
| 803 | mri_state = NULL; |
| 804 | |
| 805 | /* We continue handling the character as usual. The |
| 806 | main gas reader must also handle the .mri pseudo-op |
| 807 | to control expression parsing and the like. */ |
| 808 | } |
| 809 | } |
| 810 | #endif |
| 811 | |
| 812 | if (ch == EOF) |
| 813 | { |
| 814 | if (state != 0) |
| 815 | { |
| 816 | as_warn (_("end of file not at end of a line; newline inserted")); |
| 817 | state = 0; |
| 818 | PUT ('\n'); |
| 819 | } |
| 820 | goto fromeof; |
| 821 | } |
| 822 | |
| 823 | switch (lex[ch]) |
| 824 | { |
| 825 | case LEX_IS_WHITESPACE: |
| 826 | do |
| 827 | { |
| 828 | ch = GET (); |
| 829 | } |
| 830 | while (ch != EOF && IS_WHITESPACE (ch)); |
| 831 | if (ch == EOF) |
| 832 | goto fromeof; |
| 833 | |
| 834 | if (state == 0) |
| 835 | { |
| 836 | /* Preserve a single whitespace character at the |
| 837 | beginning of a line. */ |
| 838 | state = 1; |
| 839 | UNGET (ch); |
| 840 | PUT (' '); |
| 841 | break; |
| 842 | } |
| 843 | |
| 844 | #ifdef KEEP_WHITE_AROUND_COLON |
| 845 | if (lex[ch] == LEX_IS_COLON) |
| 846 | { |
| 847 | /* Only keep this white if there's no white *after* the |
| 848 | colon. */ |
| 849 | ch2 = GET (); |
| 850 | if (ch2 != EOF) |
| 851 | UNGET (ch2); |
| 852 | if (!IS_WHITESPACE (ch2)) |
| 853 | { |
| 854 | state = 9; |
| 855 | UNGET (ch); |
| 856 | PUT (' '); |
| 857 | break; |
| 858 | } |
| 859 | } |
| 860 | #endif |
| 861 | if (IS_COMMENT (ch) |
| 862 | || ch == '/' |
| 863 | || IS_LINE_SEPARATOR (ch) |
| 864 | || IS_PARALLEL_SEPARATOR (ch)) |
| 865 | { |
| 866 | if (scrub_m68k_mri) |
| 867 | { |
| 868 | /* In MRI mode, we keep these spaces. */ |
| 869 | UNGET (ch); |
| 870 | PUT (' '); |
| 871 | break; |
| 872 | } |
| 873 | goto recycle; |
| 874 | } |
| 875 | |
| 876 | /* If we're in state 2 or 11, we've seen a non-white |
| 877 | character followed by whitespace. If the next character |
| 878 | is ':', this is whitespace after a label name which we |
| 879 | normally must ignore. In MRI mode, though, spaces are |
| 880 | not permitted between the label and the colon. */ |
| 881 | if ((state == 2 || state == 11) |
| 882 | && lex[ch] == LEX_IS_COLON |
| 883 | && ! scrub_m68k_mri) |
| 884 | { |
| 885 | state = 1; |
| 886 | PUT (ch); |
| 887 | break; |
| 888 | } |
| 889 | |
| 890 | switch (state) |
| 891 | { |
| 892 | case 1: |
| 893 | /* We can arrive here if we leave a leading whitespace |
| 894 | character at the beginning of a line. */ |
| 895 | goto recycle; |
| 896 | case 2: |
| 897 | state = 3; |
| 898 | if (to + 1 < toend) |
| 899 | { |
| 900 | /* Optimize common case by skipping UNGET/GET. */ |
| 901 | PUT (' '); /* Sp after opco */ |
| 902 | goto recycle; |
| 903 | } |
| 904 | UNGET (ch); |
| 905 | PUT (' '); |
| 906 | break; |
| 907 | case 3: |
| 908 | if (scrub_m68k_mri) |
| 909 | { |
| 910 | /* In MRI mode, we keep these spaces. */ |
| 911 | UNGET (ch); |
| 912 | PUT (' '); |
| 913 | break; |
| 914 | } |
| 915 | goto recycle; /* Sp in operands */ |
| 916 | case 9: |
| 917 | case 10: |
| 918 | if (scrub_m68k_mri) |
| 919 | { |
| 920 | /* In MRI mode, we keep these spaces. */ |
| 921 | state = 3; |
| 922 | UNGET (ch); |
| 923 | PUT (' '); |
| 924 | break; |
| 925 | } |
| 926 | state = 10; /* Sp after symbol char */ |
| 927 | goto recycle; |
| 928 | case 11: |
| 929 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
| 930 | state = 1; |
| 931 | else |
| 932 | { |
| 933 | /* We know that ch is not ':', since we tested that |
| 934 | case above. Therefore this is not a label, so it |
| 935 | must be the opcode, and we've just seen the |
| 936 | whitespace after it. */ |
| 937 | state = 3; |
| 938 | } |
| 939 | UNGET (ch); |
| 940 | PUT (' '); /* Sp after label definition. */ |
| 941 | break; |
| 942 | default: |
| 943 | BAD_CASE (state); |
| 944 | } |
| 945 | break; |
| 946 | |
| 947 | case LEX_IS_TWOCHAR_COMMENT_1ST: |
| 948 | ch2 = GET (); |
| 949 | if (ch2 == '*') |
| 950 | { |
| 951 | for (;;) |
| 952 | { |
| 953 | do |
| 954 | { |
| 955 | ch2 = GET (); |
| 956 | if (ch2 != EOF && IS_NEWLINE (ch2)) |
| 957 | add_newlines++; |
| 958 | } |
| 959 | while (ch2 != EOF && ch2 != '*'); |
| 960 | |
| 961 | while (ch2 == '*') |
| 962 | ch2 = GET (); |
| 963 | |
| 964 | if (ch2 == EOF || ch2 == '/') |
| 965 | break; |
| 966 | |
| 967 | /* This UNGET will ensure that we count newlines |
| 968 | correctly. */ |
| 969 | UNGET (ch2); |
| 970 | } |
| 971 | |
| 972 | if (ch2 == EOF) |
| 973 | as_warn (_("end of file in multiline comment")); |
| 974 | |
| 975 | ch = ' '; |
| 976 | goto recycle; |
| 977 | } |
| 978 | #ifdef DOUBLESLASH_LINE_COMMENTS |
| 979 | else if (ch2 == '/') |
| 980 | { |
| 981 | do |
| 982 | { |
| 983 | ch = GET (); |
| 984 | } |
| 985 | while (ch != EOF && !IS_NEWLINE (ch)); |
| 986 | if (ch == EOF) |
| 987 | as_warn ("end of file in comment; newline inserted"); |
| 988 | state = 0; |
| 989 | PUT ('\n'); |
| 990 | break; |
| 991 | } |
| 992 | #endif |
| 993 | else |
| 994 | { |
| 995 | if (ch2 != EOF) |
| 996 | UNGET (ch2); |
| 997 | if (state == 9 || state == 10) |
| 998 | state = 3; |
| 999 | PUT (ch); |
| 1000 | } |
| 1001 | break; |
| 1002 | |
| 1003 | case LEX_IS_STRINGQUOTE: |
| 1004 | quotechar = ch; |
| 1005 | if (state == 10) |
| 1006 | { |
| 1007 | /* Preserve the whitespace in foo "bar". */ |
| 1008 | UNGET (ch); |
| 1009 | state = 3; |
| 1010 | PUT (' '); |
| 1011 | |
| 1012 | /* PUT didn't jump out. We could just break, but we |
| 1013 | know what will happen, so optimize a bit. */ |
| 1014 | ch = GET (); |
| 1015 | old_state = 3; |
| 1016 | } |
| 1017 | else if (state == 9) |
| 1018 | old_state = 3; |
| 1019 | else |
| 1020 | old_state = state; |
| 1021 | state = 5; |
| 1022 | PUT (ch); |
| 1023 | break; |
| 1024 | |
| 1025 | #ifndef IEEE_STYLE |
| 1026 | case LEX_IS_ONECHAR_QUOTE: |
| 1027 | #ifdef H_TICK_HEX |
| 1028 | if (state == 9 && enable_h_tick_hex) |
| 1029 | { |
| 1030 | char c; |
| 1031 | |
| 1032 | c = GET (); |
| 1033 | as_warn ("'%c found after symbol", c); |
| 1034 | UNGET (c); |
| 1035 | } |
| 1036 | #endif |
| 1037 | if (state == 10) |
| 1038 | { |
| 1039 | /* Preserve the whitespace in foo 'b'. */ |
| 1040 | UNGET (ch); |
| 1041 | state = 3; |
| 1042 | PUT (' '); |
| 1043 | break; |
| 1044 | } |
| 1045 | ch = GET (); |
| 1046 | if (ch == EOF) |
| 1047 | { |
| 1048 | as_warn (_("end of file after a one-character quote; \\0 inserted")); |
| 1049 | ch = 0; |
| 1050 | } |
| 1051 | if (ch == '\\') |
| 1052 | { |
| 1053 | ch = GET (); |
| 1054 | if (ch == EOF) |
| 1055 | { |
| 1056 | as_warn (_("end of file in escape character")); |
| 1057 | ch = '\\'; |
| 1058 | } |
| 1059 | else |
| 1060 | ch = process_escape (ch); |
| 1061 | } |
| 1062 | sprintf (out_buf, "%d", (int) (unsigned char) ch); |
| 1063 | |
| 1064 | /* None of these 'x constants for us. We want 'x'. */ |
| 1065 | if ((ch = GET ()) != '\'') |
| 1066 | { |
| 1067 | #ifdef REQUIRE_CHAR_CLOSE_QUOTE |
| 1068 | as_warn (_("missing close quote; (assumed)")); |
| 1069 | #else |
| 1070 | if (ch != EOF) |
| 1071 | UNGET (ch); |
| 1072 | #endif |
| 1073 | } |
| 1074 | if (strlen (out_buf) == 1) |
| 1075 | { |
| 1076 | PUT (out_buf[0]); |
| 1077 | break; |
| 1078 | } |
| 1079 | if (state == 9) |
| 1080 | old_state = 3; |
| 1081 | else |
| 1082 | old_state = state; |
| 1083 | state = -1; |
| 1084 | out_string = out_buf; |
| 1085 | PUT (*out_string++); |
| 1086 | break; |
| 1087 | #endif |
| 1088 | |
| 1089 | case LEX_IS_COLON: |
| 1090 | #ifdef KEEP_WHITE_AROUND_COLON |
| 1091 | state = 9; |
| 1092 | #else |
| 1093 | if (state == 9 || state == 10) |
| 1094 | state = 3; |
| 1095 | else if (state != 3) |
| 1096 | state = 1; |
| 1097 | #endif |
| 1098 | PUT (ch); |
| 1099 | break; |
| 1100 | |
| 1101 | case LEX_IS_NEWLINE: |
| 1102 | /* Roll out a bunch of newlines from inside comments, etc. */ |
| 1103 | if (add_newlines) |
| 1104 | { |
| 1105 | --add_newlines; |
| 1106 | UNGET (ch); |
| 1107 | } |
| 1108 | /* Fall through. */ |
| 1109 | |
| 1110 | case LEX_IS_LINE_SEPARATOR: |
| 1111 | state = 0; |
| 1112 | PUT (ch); |
| 1113 | break; |
| 1114 | |
| 1115 | case LEX_IS_PARALLEL_SEPARATOR: |
| 1116 | state = 1; |
| 1117 | PUT (ch); |
| 1118 | break; |
| 1119 | |
| 1120 | #ifdef TC_V850 |
| 1121 | case LEX_IS_DOUBLEDASH_1ST: |
| 1122 | ch2 = GET (); |
| 1123 | if (ch2 != '-') |
| 1124 | { |
| 1125 | if (ch2 != EOF) |
| 1126 | UNGET (ch2); |
| 1127 | goto de_fault; |
| 1128 | } |
| 1129 | /* Read and skip to end of line. */ |
| 1130 | do |
| 1131 | { |
| 1132 | ch = GET (); |
| 1133 | } |
| 1134 | while (ch != EOF && ch != '\n'); |
| 1135 | |
| 1136 | if (ch == EOF) |
| 1137 | as_warn (_("end of file in comment; newline inserted")); |
| 1138 | |
| 1139 | state = 0; |
| 1140 | PUT ('\n'); |
| 1141 | break; |
| 1142 | #endif |
| 1143 | #ifdef DOUBLEBAR_PARALLEL |
| 1144 | case LEX_IS_DOUBLEBAR_1ST: |
| 1145 | ch2 = GET (); |
| 1146 | if (ch2 != EOF) |
| 1147 | UNGET (ch2); |
| 1148 | if (ch2 != '|') |
| 1149 | goto de_fault; |
| 1150 | |
| 1151 | /* Handle '||' in two states as invoking PUT twice might |
| 1152 | result in the first one jumping out of this loop. We'd |
| 1153 | then lose track of the state and one '|' char. */ |
| 1154 | state = 13; |
| 1155 | PUT ('|'); |
| 1156 | break; |
| 1157 | #endif |
| 1158 | case LEX_IS_LINE_COMMENT_START: |
| 1159 | /* FIXME-someday: The two character comment stuff was badly |
| 1160 | thought out. On i386, we want '/' as line comment start |
| 1161 | AND we want C style comments. hence this hack. The |
| 1162 | whole lexical process should be reworked. xoxorich. */ |
| 1163 | if (ch == '/') |
| 1164 | { |
| 1165 | ch2 = GET (); |
| 1166 | if (ch2 == '*') |
| 1167 | { |
| 1168 | old_state = 3; |
| 1169 | state = -2; |
| 1170 | break; |
| 1171 | } |
| 1172 | else |
| 1173 | { |
| 1174 | UNGET (ch2); |
| 1175 | } |
| 1176 | } |
| 1177 | |
| 1178 | if (state == 0 || state == 1) /* Only comment at start of line. */ |
| 1179 | { |
| 1180 | int startch; |
| 1181 | |
| 1182 | startch = ch; |
| 1183 | |
| 1184 | do |
| 1185 | { |
| 1186 | ch = GET (); |
| 1187 | } |
| 1188 | while (ch != EOF && IS_WHITESPACE (ch)); |
| 1189 | |
| 1190 | if (ch == EOF) |
| 1191 | { |
| 1192 | as_warn (_("end of file in comment; newline inserted")); |
| 1193 | PUT ('\n'); |
| 1194 | break; |
| 1195 | } |
| 1196 | |
| 1197 | if (ch < '0' || ch > '9' || state != 0 || startch != '#') |
| 1198 | { |
| 1199 | /* Not a cpp line. */ |
| 1200 | while (ch != EOF && !IS_NEWLINE (ch)) |
| 1201 | ch = GET (); |
| 1202 | if (ch == EOF) |
| 1203 | as_warn (_("end of file in comment; newline inserted")); |
| 1204 | state = 0; |
| 1205 | PUT ('\n'); |
| 1206 | break; |
| 1207 | } |
| 1208 | /* Looks like `# 123 "filename"' from cpp. */ |
| 1209 | UNGET (ch); |
| 1210 | old_state = 4; |
| 1211 | state = -1; |
| 1212 | if (scrub_m68k_mri) |
| 1213 | out_string = "\tlinefile "; |
| 1214 | else |
| 1215 | out_string = "\t.linefile "; |
| 1216 | PUT (*out_string++); |
| 1217 | break; |
| 1218 | } |
| 1219 | |
| 1220 | #ifdef TC_D10V |
| 1221 | /* All insns end in a char for which LEX_IS_SYMBOL_COMPONENT is true. |
| 1222 | Trap is the only short insn that has a first operand that is |
| 1223 | neither register nor label. |
| 1224 | We must prevent exef0f ||trap #1 to degenerate to exef0f ||trap#1 . |
| 1225 | We can't make '#' LEX_IS_SYMBOL_COMPONENT because it is |
| 1226 | already LEX_IS_LINE_COMMENT_START. However, it is the |
| 1227 | only character in line_comment_chars for d10v, hence we |
| 1228 | can recognize it as such. */ |
| 1229 | /* An alternative approach would be to reset the state to 1 when |
| 1230 | we see '||', '<'- or '->', but that seems to be overkill. */ |
| 1231 | if (state == 10) |
| 1232 | PUT (' '); |
| 1233 | #endif |
| 1234 | /* We have a line comment character which is not at the |
| 1235 | start of a line. If this is also a normal comment |
| 1236 | character, fall through. Otherwise treat it as a default |
| 1237 | character. */ |
| 1238 | if (strchr (tc_comment_chars, ch) == NULL |
| 1239 | && (! scrub_m68k_mri |
| 1240 | || (ch != '!' && ch != '*'))) |
| 1241 | goto de_fault; |
| 1242 | if (scrub_m68k_mri |
| 1243 | && (ch == '!' || ch == '*' || ch == '#') |
| 1244 | && state != 1 |
| 1245 | && state != 10) |
| 1246 | goto de_fault; |
| 1247 | /* Fall through. */ |
| 1248 | case LEX_IS_COMMENT_START: |
| 1249 | #if defined TC_ARM && defined OBJ_ELF |
| 1250 | /* On the ARM, `@' is the comment character. |
| 1251 | Unfortunately this is also a special character in ELF .symver |
| 1252 | directives (and .type, though we deal with those another way). |
| 1253 | So we check if this line is such a directive, and treat |
| 1254 | the character as default if so. This is a hack. */ |
| 1255 | if ((symver_state != NULL) && (*symver_state == 0)) |
| 1256 | goto de_fault; |
| 1257 | #endif |
| 1258 | |
| 1259 | #ifdef TC_ARM |
| 1260 | /* For the ARM, care is needed not to damage occurrences of \@ |
| 1261 | by stripping the @ onwards. Yuck. */ |
| 1262 | if (to > tostart && *(to - 1) == '\\') |
| 1263 | /* Do not treat the @ as a start-of-comment. */ |
| 1264 | goto de_fault; |
| 1265 | #endif |
| 1266 | |
| 1267 | #ifdef WARN_COMMENTS |
| 1268 | if (!found_comment) |
| 1269 | as_where (&found_comment_file, &found_comment); |
| 1270 | #endif |
| 1271 | do |
| 1272 | { |
| 1273 | ch = GET (); |
| 1274 | } |
| 1275 | while (ch != EOF && !IS_NEWLINE (ch)); |
| 1276 | if (ch == EOF) |
| 1277 | as_warn (_("end of file in comment; newline inserted")); |
| 1278 | state = 0; |
| 1279 | PUT ('\n'); |
| 1280 | break; |
| 1281 | |
| 1282 | #ifdef H_TICK_HEX |
| 1283 | case LEX_IS_H: |
| 1284 | /* Look for strings like H'[0-9A-Fa-f] and if found, replace |
| 1285 | the H' with 0x to make them gas-style hex characters. */ |
| 1286 | if (enable_h_tick_hex) |
| 1287 | { |
| 1288 | char quot; |
| 1289 | |
| 1290 | quot = GET (); |
| 1291 | if (quot == '\'') |
| 1292 | { |
| 1293 | UNGET ('x'); |
| 1294 | ch = '0'; |
| 1295 | } |
| 1296 | else |
| 1297 | UNGET (quot); |
| 1298 | } |
| 1299 | /* FALL THROUGH */ |
| 1300 | #endif |
| 1301 | |
| 1302 | case LEX_IS_SYMBOL_COMPONENT: |
| 1303 | if (state == 10) |
| 1304 | { |
| 1305 | /* This is a symbol character following another symbol |
| 1306 | character, with whitespace in between. We skipped |
| 1307 | the whitespace earlier, so output it now. */ |
| 1308 | UNGET (ch); |
| 1309 | state = 3; |
| 1310 | PUT (' '); |
| 1311 | break; |
| 1312 | } |
| 1313 | |
| 1314 | #ifdef TC_Z80 |
| 1315 | /* "af'" is a symbol containing '\''. */ |
| 1316 | if (state == 3 && (ch == 'a' || ch == 'A')) |
| 1317 | { |
| 1318 | state = 16; |
| 1319 | PUT (ch); |
| 1320 | ch = GET (); |
| 1321 | if (ch == 'f' || ch == 'F') |
| 1322 | { |
| 1323 | state = 17; |
| 1324 | PUT (ch); |
| 1325 | break; |
| 1326 | } |
| 1327 | else |
| 1328 | { |
| 1329 | state = 9; |
| 1330 | if (!IS_SYMBOL_COMPONENT (ch)) |
| 1331 | { |
| 1332 | if (ch != EOF) |
| 1333 | UNGET (ch); |
| 1334 | break; |
| 1335 | } |
| 1336 | } |
| 1337 | } |
| 1338 | #endif |
| 1339 | if (state == 3) |
| 1340 | state = 9; |
| 1341 | |
| 1342 | /* This is a common case. Quickly copy CH and all the |
| 1343 | following symbol component or normal characters. */ |
| 1344 | if (to + 1 < toend |
| 1345 | && mri_state == NULL |
| 1346 | #if defined TC_ARM && defined OBJ_ELF |
| 1347 | && symver_state == NULL |
| 1348 | #endif |
| 1349 | ) |
| 1350 | { |
| 1351 | char *s; |
| 1352 | int len; |
| 1353 | |
| 1354 | for (s = from; s < fromend; s++) |
| 1355 | { |
| 1356 | int type; |
| 1357 | |
| 1358 | ch2 = *(unsigned char *) s; |
| 1359 | type = lex[ch2]; |
| 1360 | if (type != 0 |
| 1361 | && type != LEX_IS_SYMBOL_COMPONENT) |
| 1362 | break; |
| 1363 | } |
| 1364 | |
| 1365 | if (s > from) |
| 1366 | /* Handle the last character normally, for |
| 1367 | simplicity. */ |
| 1368 | --s; |
| 1369 | |
| 1370 | len = s - from; |
| 1371 | |
| 1372 | if (len > (toend - to) - 1) |
| 1373 | len = (toend - to) - 1; |
| 1374 | |
| 1375 | if (len > 0) |
| 1376 | { |
| 1377 | PUT (ch); |
| 1378 | memcpy (to, from, len); |
| 1379 | to += len; |
| 1380 | from += len; |
| 1381 | if (to >= toend) |
| 1382 | goto tofull; |
| 1383 | ch = GET (); |
| 1384 | } |
| 1385 | } |
| 1386 | |
| 1387 | /* Fall through. */ |
| 1388 | default: |
| 1389 | de_fault: |
| 1390 | /* Some relatively `normal' character. */ |
| 1391 | if (state == 0) |
| 1392 | { |
| 1393 | state = 11; /* Now seeing label definition. */ |
| 1394 | } |
| 1395 | else if (state == 1) |
| 1396 | { |
| 1397 | state = 2; /* Ditto. */ |
| 1398 | } |
| 1399 | else if (state == 9) |
| 1400 | { |
| 1401 | if (!IS_SYMBOL_COMPONENT (ch)) |
| 1402 | state = 3; |
| 1403 | } |
| 1404 | else if (state == 10) |
| 1405 | { |
| 1406 | if (ch == '\\') |
| 1407 | { |
| 1408 | /* Special handling for backslash: a backslash may |
| 1409 | be the beginning of a formal parameter (of a |
| 1410 | macro) following another symbol character, with |
| 1411 | whitespace in between. If that is the case, we |
| 1412 | output a space before the parameter. Strictly |
| 1413 | speaking, correct handling depends upon what the |
| 1414 | macro parameter expands into; if the parameter |
| 1415 | expands into something which does not start with |
| 1416 | an operand character, then we don't want to keep |
| 1417 | the space. We don't have enough information to |
| 1418 | make the right choice, so here we are making the |
| 1419 | choice which is more likely to be correct. */ |
| 1420 | if (to + 1 >= toend) |
| 1421 | { |
| 1422 | /* If we're near the end of the buffer, save the |
| 1423 | character for the next time round. Otherwise |
| 1424 | we'll lose our state. */ |
| 1425 | UNGET (ch); |
| 1426 | goto tofull; |
| 1427 | } |
| 1428 | *to++ = ' '; |
| 1429 | } |
| 1430 | |
| 1431 | state = 3; |
| 1432 | } |
| 1433 | PUT (ch); |
| 1434 | break; |
| 1435 | } |
| 1436 | } |
| 1437 | |
| 1438 | /*NOTREACHED*/ |
| 1439 | |
| 1440 | fromeof: |
| 1441 | /* We have reached the end of the input. */ |
| 1442 | return to - tostart; |
| 1443 | |
| 1444 | tofull: |
| 1445 | /* The output buffer is full. Save any input we have not yet |
| 1446 | processed. */ |
| 1447 | if (fromend > from) |
| 1448 | { |
| 1449 | saved_input = from; |
| 1450 | saved_input_len = fromend - from; |
| 1451 | } |
| 1452 | else |
| 1453 | saved_input = NULL; |
| 1454 | |
| 1455 | return to - tostart; |
| 1456 | } |