| 1 | /* read.c - read a source file - |
| 2 | Copyright (C) 1986, 1987, 1990, 1991, 1993, 1994 |
| 3 | Free Software Foundation, Inc. |
| 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #if 0 |
| 22 | #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will |
| 23 | change this a bit. But then, GNU isn't |
| 24 | spozed to run on your machine anyway. |
| 25 | (RMS is so shortsighted sometimes.) |
| 26 | */ |
| 27 | #else |
| 28 | #define MASK_CHAR ((int)(unsigned char)-1) |
| 29 | #endif |
| 30 | |
| 31 | |
| 32 | /* This is the largest known floating point format (for now). It will |
| 33 | grow when we do 4361 style flonums. */ |
| 34 | |
| 35 | #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) |
| 36 | |
| 37 | /* Routines that read assembler source text to build spagetti in memory. |
| 38 | Another group of these functions is in the expr.c module. */ |
| 39 | |
| 40 | /* for isdigit() */ |
| 41 | #include <ctype.h> |
| 42 | |
| 43 | #include "as.h" |
| 44 | #include "subsegs.h" |
| 45 | #include "sb.h" |
| 46 | #include "macro.h" |
| 47 | #include "libiberty.h" |
| 48 | #include "obstack.h" |
| 49 | #include "listing.h" |
| 50 | |
| 51 | #ifndef TC_START_LABEL |
| 52 | #define TC_START_LABEL(x,y) (x==':') |
| 53 | #endif |
| 54 | |
| 55 | /* The NOP_OPCODE is for the alignment fill value. |
| 56 | * fill it a nop instruction so that the disassembler does not choke |
| 57 | * on it |
| 58 | */ |
| 59 | #ifndef NOP_OPCODE |
| 60 | #define NOP_OPCODE 0x00 |
| 61 | #endif |
| 62 | |
| 63 | char *input_line_pointer; /*->next char of source file to parse. */ |
| 64 | |
| 65 | int generate_asm_lineno = 0; /* flag to generate line stab for .s file */ |
| 66 | |
| 67 | #if BITS_PER_CHAR != 8 |
| 68 | /* The following table is indexed by[(char)] and will break if |
| 69 | a char does not have exactly 256 states (hopefully 0:255!)! */ |
| 70 | die horribly; |
| 71 | #endif |
| 72 | |
| 73 | #ifndef LEX_AT |
| 74 | /* The m88k unfortunately uses @ as a label beginner. */ |
| 75 | #define LEX_AT 0 |
| 76 | #endif |
| 77 | |
| 78 | #ifndef LEX_BR |
| 79 | /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ |
| 80 | #define LEX_BR 0 |
| 81 | #endif |
| 82 | |
| 83 | #ifndef LEX_PCT |
| 84 | /* The Delta 68k assembler permits % inside label names. */ |
| 85 | #define LEX_PCT 0 |
| 86 | #endif |
| 87 | |
| 88 | #ifndef LEX_QM |
| 89 | /* The PowerPC Windows NT assemblers permits ? inside label names. */ |
| 90 | #define LEX_QM 0 |
| 91 | #endif |
| 92 | |
| 93 | /* used by is_... macros. our ctype[] */ |
| 94 | char lex_type[256] = |
| 95 | { |
| 96 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ |
| 97 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ |
| 98 | 0, 0, 0, 0, 3, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ |
| 99 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */ |
| 100 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ |
| 101 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ |
| 102 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ |
| 103 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 0, /* pqrstuvwxyz{|}~. */ |
| 104 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 105 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 106 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 107 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 108 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 109 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 110 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 111 | }; |
| 112 | |
| 113 | |
| 114 | /* |
| 115 | * In: a character. |
| 116 | * Out: 1 if this character ends a line. |
| 117 | */ |
| 118 | #define _ (0) |
| 119 | char is_end_of_line[256] = |
| 120 | { |
| 121 | #ifdef CR_EOL |
| 122 | _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */ |
| 123 | #else |
| 124 | _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */ |
| 125 | #endif |
| 126 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 127 | #ifdef TC_HPPA |
| 128 | _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */ |
| 129 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */ |
| 130 | #else |
| 131 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 132 | _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */ |
| 133 | #endif |
| 134 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 135 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 136 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 137 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 138 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 139 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 140 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 141 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 142 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
| 143 | }; |
| 144 | #undef _ |
| 145 | |
| 146 | /* Functions private to this file. */ |
| 147 | |
| 148 | static char *buffer; /* 1st char of each buffer of lines is here. */ |
| 149 | static char *buffer_limit; /*->1 + last char in buffer. */ |
| 150 | |
| 151 | #ifdef TARGET_BYTES_BIG_ENDIAN |
| 152 | /* Hack to deal with tc-*.h defining TARGET_BYTES_BIG_ENDIAN to empty |
| 153 | instead of to 0 or 1. */ |
| 154 | #if 5 - TARGET_BYTES_BIG_ENDIAN - 5 == 10 |
| 155 | #undef TARGET_BYTES_BIG_ENDIAN |
| 156 | #define TARGET_BYTES_BIG_ENDIAN 1 |
| 157 | #endif |
| 158 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; |
| 159 | #else |
| 160 | int target_big_endian /* = 0 */; |
| 161 | #endif |
| 162 | |
| 163 | static char *old_buffer; /* JF a hack */ |
| 164 | static char *old_input; |
| 165 | static char *old_limit; |
| 166 | |
| 167 | /* Variables for handling include file directory list. */ |
| 168 | |
| 169 | char **include_dirs; /* List of pointers to directories to |
| 170 | search for .include's */ |
| 171 | int include_dir_count; /* How many are in the list */ |
| 172 | int include_dir_maxlen = 1;/* Length of longest in list */ |
| 173 | |
| 174 | #ifndef WORKING_DOT_WORD |
| 175 | struct broken_word *broken_words; |
| 176 | int new_broken_words; |
| 177 | #endif |
| 178 | |
| 179 | /* The current offset into the absolute section. We don't try to |
| 180 | build frags in the absolute section, since no data can be stored |
| 181 | there. We just keep track of the current offset. */ |
| 182 | addressT abs_section_offset; |
| 183 | |
| 184 | /* If this line had an MRI style label, it is stored in this variable. |
| 185 | This is used by some of the MRI pseudo-ops. */ |
| 186 | symbolS *line_label; |
| 187 | |
| 188 | /* This global variable is used to support MRI common sections. We |
| 189 | translate such sections into a common symbol. This variable is |
| 190 | non-NULL when we are in an MRI common section. */ |
| 191 | symbolS *mri_common_symbol; |
| 192 | |
| 193 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we |
| 194 | need to align to an even byte boundary unless the next pseudo-op is |
| 195 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment |
| 196 | may be needed. */ |
| 197 | static int mri_pending_align; |
| 198 | |
| 199 | static int scrub_from_string PARAMS ((char **)); |
| 200 | static void do_align PARAMS ((int, char *)); |
| 201 | static int hex_float PARAMS ((int, char *)); |
| 202 | static void do_org PARAMS ((segT, expressionS *, int)); |
| 203 | char *demand_copy_string PARAMS ((int *lenP)); |
| 204 | int is_it_end_of_statement PARAMS ((void)); |
| 205 | static segT get_segmented_expression PARAMS ((expressionS *expP)); |
| 206 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); |
| 207 | static void pobegin PARAMS ((void)); |
| 208 | static int get_line_sb PARAMS ((sb *)); |
| 209 | \f |
| 210 | |
| 211 | void |
| 212 | read_begin () |
| 213 | { |
| 214 | const char *p; |
| 215 | |
| 216 | pobegin (); |
| 217 | obj_read_begin_hook (); |
| 218 | |
| 219 | /* Something close -- but not too close -- to a multiple of 1024. |
| 220 | The debugging malloc I'm using has 24 bytes of overhead. */ |
| 221 | obstack_begin (¬es, 5090); |
| 222 | obstack_begin (&cond_obstack, 990); |
| 223 | |
| 224 | /* Use machine dependent syntax */ |
| 225 | for (p = line_separator_chars; *p; p++) |
| 226 | is_end_of_line[(unsigned char) *p] = 1; |
| 227 | /* Use more. FIXME-SOMEDAY. */ |
| 228 | |
| 229 | if (flag_mri) |
| 230 | lex_type['?'] = 3; |
| 231 | } |
| 232 | \f |
| 233 | /* set up pseudo-op tables */ |
| 234 | |
| 235 | static struct hash_control *po_hash; |
| 236 | |
| 237 | static const pseudo_typeS potable[] = |
| 238 | { |
| 239 | {"abort", s_abort, 0}, |
| 240 | {"align", s_align_ptwo, 0}, |
| 241 | {"ascii", stringer, 0}, |
| 242 | {"asciz", stringer, 1}, |
| 243 | {"balign", s_align_bytes, 0}, |
| 244 | /* block */ |
| 245 | {"byte", cons, 1}, |
| 246 | {"comm", s_comm, 0}, |
| 247 | {"common", s_mri_common, 0}, |
| 248 | {"common.s", s_mri_common, 1}, |
| 249 | {"data", s_data, 0}, |
| 250 | {"dc", cons, 2}, |
| 251 | {"dc.b", cons, 1}, |
| 252 | {"dc.d", float_cons, 'd'}, |
| 253 | {"dc.l", cons, 4}, |
| 254 | {"dc.s", float_cons, 'f'}, |
| 255 | {"dc.w", cons, 2}, |
| 256 | {"dc.x", float_cons, 'x'}, |
| 257 | {"dcb", s_space, 2}, |
| 258 | {"dcb.b", s_space, 1}, |
| 259 | {"dcb.d", s_float_space, 'd'}, |
| 260 | {"dcb.l", s_space, 4}, |
| 261 | {"dcb.s", s_float_space, 'f'}, |
| 262 | {"dcb.w", s_space, 2}, |
| 263 | {"dcb.x", s_float_space, 'x'}, |
| 264 | {"ds", s_space, 2}, |
| 265 | {"ds.b", s_space, 1}, |
| 266 | {"ds.d", s_space, 8}, |
| 267 | {"ds.l", s_space, 4}, |
| 268 | {"ds.p", s_space, 12}, |
| 269 | {"ds.s", s_space, 4}, |
| 270 | {"ds.w", s_space, 2}, |
| 271 | {"ds.x", s_space, 12}, |
| 272 | #ifdef S_SET_DESC |
| 273 | {"desc", s_desc, 0}, |
| 274 | #endif |
| 275 | /* dim */ |
| 276 | {"double", float_cons, 'd'}, |
| 277 | /* dsect */ |
| 278 | {"eject", listing_eject, 0}, /* Formfeed listing */ |
| 279 | {"else", s_else, 0}, |
| 280 | {"elsec", s_else, 0}, |
| 281 | {"end", s_end, 0}, |
| 282 | {"endc", s_endif, 0}, |
| 283 | {"endif", s_endif, 0}, |
| 284 | /* endef */ |
| 285 | {"equ", s_set, 0}, |
| 286 | /* err */ |
| 287 | {"exitm", s_mexit, 0}, |
| 288 | /* extend */ |
| 289 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ |
| 290 | {"appfile", s_app_file, 1}, |
| 291 | {"appline", s_app_line, 0}, |
| 292 | {"fail", s_fail, 0}, |
| 293 | {"file", s_app_file, 0}, |
| 294 | {"fill", s_fill, 0}, |
| 295 | {"float", float_cons, 'f'}, |
| 296 | {"format", s_ignore, 0}, |
| 297 | {"global", s_globl, 0}, |
| 298 | {"globl", s_globl, 0}, |
| 299 | {"hword", cons, 2}, |
| 300 | {"if", s_if, (int) O_ne}, |
| 301 | {"ifc", s_ifc, 0}, |
| 302 | {"ifdef", s_ifdef, 0}, |
| 303 | {"ifeq", s_if, (int) O_eq}, |
| 304 | {"ifeqs", s_ifeqs, 0}, |
| 305 | {"ifge", s_if, (int) O_ge}, |
| 306 | {"ifgt", s_if, (int) O_gt}, |
| 307 | {"ifle", s_if, (int) O_le}, |
| 308 | {"iflt", s_if, (int) O_lt}, |
| 309 | {"ifnc", s_ifc, 1}, |
| 310 | {"ifndef", s_ifdef, 1}, |
| 311 | {"ifne", s_if, (int) O_ne}, |
| 312 | {"ifnes", s_ifeqs, 1}, |
| 313 | {"ifnotdef", s_ifdef, 1}, |
| 314 | {"include", s_include, 0}, |
| 315 | {"int", cons, 4}, |
| 316 | {"irp", s_irp, 0}, |
| 317 | {"irpc", s_irp, 1}, |
| 318 | {"lcomm", s_lcomm, 0}, |
| 319 | {"lflags", listing_flags, 0}, /* Listing flags */ |
| 320 | {"list", listing_list, 1}, /* Turn listing on */ |
| 321 | {"llen", listing_psize, 1}, |
| 322 | {"long", cons, 4}, |
| 323 | {"lsym", s_lsym, 0}, |
| 324 | {"macro", s_macro, 0}, |
| 325 | {"mexit", s_mexit, 0}, |
| 326 | {"noformat", s_ignore, 0}, |
| 327 | {"nolist", listing_list, 0}, /* Turn listing off */ |
| 328 | {"nopage", listing_nopage, 0}, |
| 329 | {"octa", cons, 16}, |
| 330 | {"offset", s_struct, 0}, |
| 331 | {"org", s_org, 0}, |
| 332 | {"p2align", s_align_ptwo, 0}, |
| 333 | {"page", listing_eject, 0}, |
| 334 | {"plen", listing_psize, 0}, |
| 335 | {"psize", listing_psize, 0}, /* set paper size */ |
| 336 | /* print */ |
| 337 | {"quad", cons, 8}, |
| 338 | {"rept", s_rept, 0}, |
| 339 | {"rva", s_rva, 4}, |
| 340 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ |
| 341 | /* scl */ |
| 342 | /* sect */ |
| 343 | {"set", s_set, 0}, |
| 344 | {"short", cons, 2}, |
| 345 | {"single", float_cons, 'f'}, |
| 346 | /* size */ |
| 347 | {"space", s_space, 0}, |
| 348 | {"spc", s_ignore, 0}, |
| 349 | {"stabd", s_stab, 'd'}, |
| 350 | {"stabn", s_stab, 'n'}, |
| 351 | {"stabs", s_stab, 's'}, |
| 352 | {"string", stringer, 1}, |
| 353 | {"struct", s_struct, 0}, |
| 354 | /* tag */ |
| 355 | {"text", s_text, 0}, |
| 356 | |
| 357 | /* This is for gcc to use. It's only just been added (2/94), so gcc |
| 358 | won't be able to use it for a while -- probably a year or more. |
| 359 | But once this has been released, check with gcc maintainers |
| 360 | before deleting it or even changing the spelling. */ |
| 361 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, |
| 362 | /* If we're folding case -- done for some targets, not necessarily |
| 363 | all -- the above string in an input file will be converted to |
| 364 | this one. Match it either way... */ |
| 365 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, |
| 366 | |
| 367 | {"title", listing_title, 0}, /* Listing title */ |
| 368 | {"ttl", listing_title, 0}, |
| 369 | /* type */ |
| 370 | /* use */ |
| 371 | /* val */ |
| 372 | {"xcom", s_comm, 0}, |
| 373 | {"xdef", s_globl, 0}, |
| 374 | {"xref", s_ignore, 0}, |
| 375 | {"xstabs", s_xstab, 's'}, |
| 376 | {"word", cons, 2}, |
| 377 | {"zero", s_space, 0}, |
| 378 | {NULL} /* end sentinel */ |
| 379 | }; |
| 380 | |
| 381 | static int pop_override_ok = 0; |
| 382 | static const char *pop_table_name; |
| 383 | |
| 384 | void |
| 385 | pop_insert (table) |
| 386 | const pseudo_typeS *table; |
| 387 | { |
| 388 | const char *errtxt; |
| 389 | const pseudo_typeS *pop; |
| 390 | for (pop = table; pop->poc_name; pop++) |
| 391 | { |
| 392 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); |
| 393 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) |
| 394 | as_fatal ("error constructing %s pseudo-op table", pop_table_name); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | #ifndef md_pop_insert |
| 399 | #define md_pop_insert() pop_insert(md_pseudo_table) |
| 400 | #endif |
| 401 | |
| 402 | #ifndef obj_pop_insert |
| 403 | #define obj_pop_insert() pop_insert(obj_pseudo_table) |
| 404 | #endif |
| 405 | |
| 406 | static void |
| 407 | pobegin () |
| 408 | { |
| 409 | po_hash = hash_new (); |
| 410 | |
| 411 | /* Do the target-specific pseudo ops. */ |
| 412 | pop_table_name = "md"; |
| 413 | md_pop_insert (); |
| 414 | |
| 415 | /* Now object specific. Skip any that were in the target table. */ |
| 416 | pop_table_name = "obj"; |
| 417 | pop_override_ok = 1; |
| 418 | obj_pop_insert (); |
| 419 | |
| 420 | /* Now portable ones. Skip any that we've seen already. */ |
| 421 | pop_table_name = "standard"; |
| 422 | pop_insert (potable); |
| 423 | } |
| 424 | \f |
| 425 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ |
| 426 | if (ignore_input ()) \ |
| 427 | { \ |
| 428 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ |
| 429 | if (input_line_pointer == buffer_limit) \ |
| 430 | break; \ |
| 431 | continue; \ |
| 432 | } |
| 433 | |
| 434 | |
| 435 | /* This function is used when scrubbing the characters between #APP |
| 436 | and #NO_APP. */ |
| 437 | |
| 438 | static char *scrub_string; |
| 439 | static char *scrub_string_end; |
| 440 | |
| 441 | static int |
| 442 | scrub_from_string (from) |
| 443 | char **from; |
| 444 | { |
| 445 | int size; |
| 446 | |
| 447 | *from = scrub_string; |
| 448 | size = scrub_string_end - scrub_string; |
| 449 | scrub_string = scrub_string_end; |
| 450 | return size; |
| 451 | } |
| 452 | |
| 453 | /* read_a_source_file() |
| 454 | * |
| 455 | * We read the file, putting things into a web that |
| 456 | * represents what we have been reading. |
| 457 | */ |
| 458 | void |
| 459 | read_a_source_file (name) |
| 460 | char *name; |
| 461 | { |
| 462 | register char c; |
| 463 | register char *s; /* string of symbol, '\0' appended */ |
| 464 | register int temp; |
| 465 | pseudo_typeS *pop; |
| 466 | |
| 467 | buffer = input_scrub_new_file (name); |
| 468 | |
| 469 | listing_file (name); |
| 470 | listing_newline (""); |
| 471 | |
| 472 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) |
| 473 | { /* We have another line to parse. */ |
| 474 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ |
| 475 | contin: /* JF this goto is my fault I admit it. |
| 476 | Someone brave please re-write the whole |
| 477 | input section here? Pleeze??? */ |
| 478 | while (input_line_pointer < buffer_limit) |
| 479 | { |
| 480 | /* We have more of this buffer to parse. */ |
| 481 | |
| 482 | /* |
| 483 | * We now have input_line_pointer->1st char of next line. |
| 484 | * If input_line_pointer [-1] == '\n' then we just |
| 485 | * scanned another line: so bump line counters. |
| 486 | */ |
| 487 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) |
| 488 | { |
| 489 | #ifdef md_start_line_hook |
| 490 | md_start_line_hook (); |
| 491 | #endif |
| 492 | |
| 493 | if (input_line_pointer[-1] == '\n') |
| 494 | bump_line_counters (); |
| 495 | |
| 496 | line_label = NULL; |
| 497 | |
| 498 | if (flag_mri |
| 499 | #ifdef LABELS_WITHOUT_COLONS |
| 500 | || 1 |
| 501 | #endif |
| 502 | ) |
| 503 | { |
| 504 | /* Text at the start of a line must be a label, we |
| 505 | run down and stick a colon in. */ |
| 506 | if (is_name_beginner (*input_line_pointer)) |
| 507 | { |
| 508 | char *line_start = input_line_pointer; |
| 509 | char c; |
| 510 | |
| 511 | HANDLE_CONDITIONAL_ASSEMBLY (); |
| 512 | |
| 513 | c = get_symbol_end (); |
| 514 | |
| 515 | /* In MRI mode, the EQU pseudoop must be |
| 516 | handled specially. */ |
| 517 | if (flag_mri) |
| 518 | { |
| 519 | char *rest = input_line_pointer + 1; |
| 520 | |
| 521 | if (*rest == ':') |
| 522 | ++rest; |
| 523 | if (*rest == ' ' || *rest == '\t') |
| 524 | ++rest; |
| 525 | if ((strncasecmp (rest, "EQU", 3) == 0 |
| 526 | || strncasecmp (rest, "SET", 3) == 0) |
| 527 | && (rest[3] == ' ' || rest[3] == '\t')) |
| 528 | { |
| 529 | input_line_pointer = rest + 3; |
| 530 | equals (line_start); |
| 531 | continue; |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | line_label = colon (line_start); |
| 536 | |
| 537 | *input_line_pointer = c; |
| 538 | if (c == ':') |
| 539 | input_line_pointer++; |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * We are at the begining of a line, or similar place. |
| 546 | * We expect a well-formed assembler statement. |
| 547 | * A "symbol-name:" is a statement. |
| 548 | * |
| 549 | * Depending on what compiler is used, the order of these tests |
| 550 | * may vary to catch most common case 1st. |
| 551 | * Each test is independent of all other tests at the (top) level. |
| 552 | * PLEASE make a compiler that doesn't use this assembler. |
| 553 | * It is crufty to waste a compiler's time encoding things for this |
| 554 | * assembler, which then wastes more time decoding it. |
| 555 | * (And communicating via (linear) files is silly! |
| 556 | * If you must pass stuff, please pass a tree!) |
| 557 | */ |
| 558 | if ((c = *input_line_pointer++) == '\t' |
| 559 | || c == ' ' |
| 560 | || c == '\f' |
| 561 | || c == 0) |
| 562 | { |
| 563 | c = *input_line_pointer++; |
| 564 | } |
| 565 | know (c != ' '); /* No further leading whitespace. */ |
| 566 | LISTING_NEWLINE (); |
| 567 | /* |
| 568 | * C is the 1st significant character. |
| 569 | * Input_line_pointer points after that character. |
| 570 | */ |
| 571 | if (is_name_beginner (c)) |
| 572 | { |
| 573 | /* want user-defined label or pseudo/opcode */ |
| 574 | HANDLE_CONDITIONAL_ASSEMBLY (); |
| 575 | |
| 576 | s = --input_line_pointer; |
| 577 | c = get_symbol_end (); /* name's delimiter */ |
| 578 | /* |
| 579 | * C is character after symbol. |
| 580 | * That character's place in the input line is now '\0'. |
| 581 | * S points to the beginning of the symbol. |
| 582 | * [In case of pseudo-op, s->'.'.] |
| 583 | * Input_line_pointer->'\0' where c was. |
| 584 | */ |
| 585 | if (TC_START_LABEL(c, input_line_pointer)) |
| 586 | { |
| 587 | if (flag_mri) |
| 588 | { |
| 589 | char *rest = input_line_pointer + 1; |
| 590 | |
| 591 | /* In MRI mode, \tsym: set 0 is permitted. */ |
| 592 | |
| 593 | if (*rest == ':') |
| 594 | ++rest; |
| 595 | if (*rest == ' ' || *rest == '\t') |
| 596 | ++rest; |
| 597 | if ((strncasecmp (rest, "EQU", 3) == 0 |
| 598 | || strncasecmp (rest, "SET", 3) == 0) |
| 599 | && (rest[3] == ' ' || rest[3] == '\t')) |
| 600 | { |
| 601 | input_line_pointer = rest + 3; |
| 602 | equals (s); |
| 603 | continue; |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | line_label = colon (s); /* user-defined label */ |
| 608 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ |
| 609 | /* Input_line_pointer->after ':'. */ |
| 610 | SKIP_WHITESPACE (); |
| 611 | |
| 612 | |
| 613 | } |
| 614 | else if (c == '=' |
| 615 | || (input_line_pointer[1] == '=' |
| 616 | #ifdef TC_EQUAL_IN_INSN |
| 617 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) |
| 618 | #endif |
| 619 | )) |
| 620 | { |
| 621 | equals (s); |
| 622 | demand_empty_rest_of_line (); |
| 623 | } |
| 624 | else |
| 625 | { /* expect pseudo-op or machine instruction */ |
| 626 | pop = NULL; |
| 627 | |
| 628 | #define IGNORE_OPCODE_CASE |
| 629 | #ifdef IGNORE_OPCODE_CASE |
| 630 | { |
| 631 | char *s2 = s; |
| 632 | while (*s2) |
| 633 | { |
| 634 | if (isupper (*s2)) |
| 635 | *s2 = tolower (*s2); |
| 636 | s2++; |
| 637 | } |
| 638 | } |
| 639 | #endif |
| 640 | |
| 641 | if (flag_mri |
| 642 | #ifdef NO_PSEUDO_DOT |
| 643 | || 1 |
| 644 | #endif |
| 645 | ) |
| 646 | { |
| 647 | /* The MRI assembler and the m88k use pseudo-ops |
| 648 | without a period. */ |
| 649 | pop = (pseudo_typeS *) hash_find (po_hash, s); |
| 650 | if (pop != NULL && pop->poc_handler == NULL) |
| 651 | pop = NULL; |
| 652 | } |
| 653 | |
| 654 | if (pop != NULL |
| 655 | || (! flag_mri && *s == '.')) |
| 656 | { |
| 657 | /* |
| 658 | * PSEUDO - OP. |
| 659 | * |
| 660 | * WARNING: c has next char, which may be end-of-line. |
| 661 | * We lookup the pseudo-op table with s+1 because we |
| 662 | * already know that the pseudo-op begins with a '.'. |
| 663 | */ |
| 664 | |
| 665 | if (pop == NULL) |
| 666 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); |
| 667 | |
| 668 | /* In MRI mode, we may need to insert an |
| 669 | automatic alignment directive. What a hack |
| 670 | this is. */ |
| 671 | if (mri_pending_align |
| 672 | && (pop == NULL |
| 673 | || ! ((pop->poc_handler == cons |
| 674 | && pop->poc_val == 1) |
| 675 | || (pop->poc_handler == s_space |
| 676 | && pop->poc_val == 1)))) |
| 677 | { |
| 678 | do_align (1, (char *) NULL); |
| 679 | mri_pending_align = 0; |
| 680 | } |
| 681 | |
| 682 | /* Print the error msg now, while we still can */ |
| 683 | if (pop == NULL) |
| 684 | { |
| 685 | as_bad ("Unknown pseudo-op: `%s'", s); |
| 686 | *input_line_pointer = c; |
| 687 | s_ignore (0); |
| 688 | continue; |
| 689 | } |
| 690 | |
| 691 | /* Put it back for error messages etc. */ |
| 692 | *input_line_pointer = c; |
| 693 | /* The following skip of whitespace is compulsory. |
| 694 | A well shaped space is sometimes all that separates |
| 695 | keyword from operands. */ |
| 696 | if (c == ' ' || c == '\t') |
| 697 | input_line_pointer++; |
| 698 | /* |
| 699 | * Input_line is restored. |
| 700 | * Input_line_pointer->1st non-blank char |
| 701 | * after pseudo-operation. |
| 702 | */ |
| 703 | (*pop->poc_handler) (pop->poc_val); |
| 704 | |
| 705 | /* If that was .end, just get out now. */ |
| 706 | if (pop->poc_handler == s_end) |
| 707 | goto quit; |
| 708 | } |
| 709 | else |
| 710 | { /* machine instruction */ |
| 711 | int inquote = 0; |
| 712 | |
| 713 | if (mri_pending_align) |
| 714 | { |
| 715 | do_align (1, (char *) NULL); |
| 716 | mri_pending_align = 0; |
| 717 | } |
| 718 | |
| 719 | /* WARNING: c has char, which may be end-of-line. */ |
| 720 | /* Also: input_line_pointer->`\0` where c was. */ |
| 721 | *input_line_pointer = c; |
| 722 | while (!is_end_of_line[(unsigned char) *input_line_pointer] |
| 723 | || inquote |
| 724 | #ifdef TC_EOL_IN_INSN |
| 725 | || TC_EOL_IN_INSN (input_line_pointer) |
| 726 | #endif |
| 727 | ) |
| 728 | { |
| 729 | if (flag_mri && *input_line_pointer == '\'') |
| 730 | inquote = ! inquote; |
| 731 | input_line_pointer++; |
| 732 | } |
| 733 | |
| 734 | c = *input_line_pointer; |
| 735 | *input_line_pointer = '\0'; |
| 736 | |
| 737 | #ifdef OBJ_GENERATE_ASM_LINENO |
| 738 | if (generate_asm_lineno == 0) |
| 739 | { |
| 740 | if (ecoff_no_current_file ()) |
| 741 | generate_asm_lineno = 1; |
| 742 | } |
| 743 | if (generate_asm_lineno == 1) |
| 744 | { |
| 745 | unsigned int lineno; |
| 746 | char *s; |
| 747 | |
| 748 | as_where (&s, &lineno); |
| 749 | OBJ_GENERATE_ASM_LINENO (s, lineno); |
| 750 | } |
| 751 | #endif |
| 752 | |
| 753 | if (macro_defined) |
| 754 | { |
| 755 | sb out; |
| 756 | const char *err; |
| 757 | |
| 758 | if (check_macro (s, &out, '\0', &err)) |
| 759 | { |
| 760 | if (err != NULL) |
| 761 | as_bad (err); |
| 762 | *input_line_pointer++ = c; |
| 763 | input_scrub_include_sb (&out, |
| 764 | input_line_pointer); |
| 765 | sb_kill (&out); |
| 766 | buffer_limit = |
| 767 | input_scrub_next_buffer (&input_line_pointer); |
| 768 | continue; |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | md_assemble (s); /* Assemble 1 instruction. */ |
| 773 | |
| 774 | *input_line_pointer++ = c; |
| 775 | |
| 776 | /* We resume loop AFTER the end-of-line from |
| 777 | this instruction. */ |
| 778 | } /* if (*s=='.') */ |
| 779 | } /* if c==':' */ |
| 780 | continue; |
| 781 | } /* if (is_name_beginner(c) */ |
| 782 | |
| 783 | |
| 784 | /* Empty statement? */ |
| 785 | if (is_end_of_line[(unsigned char) c]) |
| 786 | continue; |
| 787 | |
| 788 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) |
| 789 | && isdigit (c)) |
| 790 | { |
| 791 | /* local label ("4:") */ |
| 792 | char *backup = input_line_pointer; |
| 793 | |
| 794 | HANDLE_CONDITIONAL_ASSEMBLY (); |
| 795 | |
| 796 | temp = c - '0'; |
| 797 | |
| 798 | while (isdigit (*input_line_pointer)) |
| 799 | { |
| 800 | temp = (temp * 10) + *input_line_pointer - '0'; |
| 801 | ++input_line_pointer; |
| 802 | } /* read the whole number */ |
| 803 | |
| 804 | if (LOCAL_LABELS_DOLLAR |
| 805 | && *input_line_pointer == '$' |
| 806 | && *(input_line_pointer + 1) == ':') |
| 807 | { |
| 808 | input_line_pointer += 2; |
| 809 | |
| 810 | if (dollar_label_defined (temp)) |
| 811 | { |
| 812 | as_fatal ("label \"%d$\" redefined", temp); |
| 813 | } |
| 814 | |
| 815 | define_dollar_label (temp); |
| 816 | colon (dollar_label_name (temp, 0)); |
| 817 | continue; |
| 818 | } |
| 819 | |
| 820 | if (LOCAL_LABELS_FB |
| 821 | && *input_line_pointer++ == ':') |
| 822 | { |
| 823 | fb_label_instance_inc (temp); |
| 824 | colon (fb_label_name (temp, 0)); |
| 825 | continue; |
| 826 | } |
| 827 | |
| 828 | input_line_pointer = backup; |
| 829 | } /* local label ("4:") */ |
| 830 | |
| 831 | if (c && strchr (line_comment_chars, c)) |
| 832 | { /* Its a comment. Better say APP or NO_APP */ |
| 833 | char *ends; |
| 834 | char *new_buf; |
| 835 | char *new_tmp; |
| 836 | unsigned int new_length; |
| 837 | char *tmp_buf = 0; |
| 838 | |
| 839 | bump_line_counters (); |
| 840 | s = input_line_pointer; |
| 841 | if (strncmp (s, "APP\n", 4)) |
| 842 | continue; /* We ignore it */ |
| 843 | s += 4; |
| 844 | |
| 845 | ends = strstr (s, "#NO_APP\n"); |
| 846 | |
| 847 | if (!ends) |
| 848 | { |
| 849 | unsigned int tmp_len; |
| 850 | unsigned int num; |
| 851 | |
| 852 | /* The end of the #APP wasn't in this buffer. We |
| 853 | keep reading in buffers until we find the #NO_APP |
| 854 | that goes with this #APP There is one. The specs |
| 855 | guarentee it. . . */ |
| 856 | tmp_len = buffer_limit - s; |
| 857 | tmp_buf = xmalloc (tmp_len + 1); |
| 858 | memcpy (tmp_buf, s, tmp_len); |
| 859 | do |
| 860 | { |
| 861 | new_tmp = input_scrub_next_buffer (&buffer); |
| 862 | if (!new_tmp) |
| 863 | break; |
| 864 | else |
| 865 | buffer_limit = new_tmp; |
| 866 | input_line_pointer = buffer; |
| 867 | ends = strstr (buffer, "#NO_APP\n"); |
| 868 | if (ends) |
| 869 | num = ends - buffer; |
| 870 | else |
| 871 | num = buffer_limit - buffer; |
| 872 | |
| 873 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); |
| 874 | memcpy (tmp_buf + tmp_len, buffer, num); |
| 875 | tmp_len += num; |
| 876 | } |
| 877 | while (!ends); |
| 878 | |
| 879 | input_line_pointer = ends ? ends + 8 : NULL; |
| 880 | |
| 881 | s = tmp_buf; |
| 882 | ends = s + tmp_len; |
| 883 | |
| 884 | } |
| 885 | else |
| 886 | { |
| 887 | input_line_pointer = ends + 8; |
| 888 | } |
| 889 | |
| 890 | scrub_string = s; |
| 891 | scrub_string_end = ends; |
| 892 | |
| 893 | new_length = ends - s; |
| 894 | new_buf = (char *) xmalloc (new_length); |
| 895 | new_tmp = new_buf; |
| 896 | for (;;) |
| 897 | { |
| 898 | int space; |
| 899 | int size; |
| 900 | |
| 901 | space = (new_buf + new_length) - new_tmp; |
| 902 | size = do_scrub_chars (scrub_from_string, new_tmp, space); |
| 903 | |
| 904 | if (size < space) |
| 905 | { |
| 906 | new_tmp += size; |
| 907 | break; |
| 908 | } |
| 909 | |
| 910 | new_buf = xrealloc (new_buf, new_length + 100); |
| 911 | new_tmp = new_buf + new_length; |
| 912 | new_length += 100; |
| 913 | } |
| 914 | |
| 915 | if (tmp_buf) |
| 916 | free (tmp_buf); |
| 917 | old_buffer = buffer; |
| 918 | old_input = input_line_pointer; |
| 919 | old_limit = buffer_limit; |
| 920 | buffer = new_buf; |
| 921 | input_line_pointer = new_buf; |
| 922 | buffer_limit = new_tmp; |
| 923 | continue; |
| 924 | } |
| 925 | |
| 926 | HANDLE_CONDITIONAL_ASSEMBLY (); |
| 927 | |
| 928 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ |
| 929 | input_line_pointer--; /* Report unknown char as ignored. */ |
| 930 | ignore_rest_of_line (); |
| 931 | } /* while (input_line_pointer<buffer_limit) */ |
| 932 | |
| 933 | #ifdef md_after_pass_hook |
| 934 | md_after_pass_hook (); |
| 935 | #endif |
| 936 | |
| 937 | if (old_buffer) |
| 938 | { |
| 939 | free (buffer); |
| 940 | bump_line_counters (); |
| 941 | if (old_input != 0) |
| 942 | { |
| 943 | buffer = old_buffer; |
| 944 | input_line_pointer = old_input; |
| 945 | buffer_limit = old_limit; |
| 946 | old_buffer = 0; |
| 947 | goto contin; |
| 948 | } |
| 949 | } |
| 950 | } /* while (more buffers to scan) */ |
| 951 | |
| 952 | quit: |
| 953 | input_scrub_close (); /* Close the input file */ |
| 954 | } |
| 955 | |
| 956 | /* For most MRI pseudo-ops, the line actually ends at the first |
| 957 | nonquoted space. This function looks for that point, stuffs a null |
| 958 | in, and sets *STOPCP to the character that used to be there, and |
| 959 | returns the location. */ |
| 960 | |
| 961 | char * |
| 962 | mri_comment_field (stopcp) |
| 963 | char *stopcp; |
| 964 | { |
| 965 | char *s; |
| 966 | int inquote = 0; |
| 967 | |
| 968 | know (flag_mri); |
| 969 | |
| 970 | for (s = input_line_pointer; |
| 971 | ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t') |
| 972 | || inquote); |
| 973 | s++) |
| 974 | { |
| 975 | if (*s == '\'') |
| 976 | inquote = ! inquote; |
| 977 | } |
| 978 | *stopcp = *s; |
| 979 | *s = '\0'; |
| 980 | return s; |
| 981 | } |
| 982 | |
| 983 | /* Skip to the end of an MRI comment field. */ |
| 984 | |
| 985 | void |
| 986 | mri_comment_end (stop, stopc) |
| 987 | char *stop; |
| 988 | int stopc; |
| 989 | { |
| 990 | know (flag_mri); |
| 991 | |
| 992 | input_line_pointer = stop; |
| 993 | *stop = stopc; |
| 994 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 995 | ++input_line_pointer; |
| 996 | } |
| 997 | |
| 998 | void |
| 999 | s_abort (ignore) |
| 1000 | int ignore; |
| 1001 | { |
| 1002 | as_fatal (".abort detected. Abandoning ship."); |
| 1003 | } |
| 1004 | |
| 1005 | /* Guts of .align directive. */ |
| 1006 | static void |
| 1007 | do_align (n, fill) |
| 1008 | int n; |
| 1009 | char *fill; |
| 1010 | { |
| 1011 | #ifdef md_do_align |
| 1012 | md_do_align (n, fill, just_record_alignment); |
| 1013 | #endif |
| 1014 | if (!fill) |
| 1015 | { |
| 1016 | /* @@ Fix this right for BFD! */ |
| 1017 | static char zero; |
| 1018 | static char nop_opcode = NOP_OPCODE; |
| 1019 | |
| 1020 | if (now_seg != data_section && now_seg != bss_section) |
| 1021 | { |
| 1022 | fill = &nop_opcode; |
| 1023 | } |
| 1024 | else |
| 1025 | { |
| 1026 | fill = &zero; |
| 1027 | } |
| 1028 | } |
| 1029 | /* Only make a frag if we HAVE to. . . */ |
| 1030 | if (n && !need_pass_2) |
| 1031 | frag_align (n, *fill); |
| 1032 | |
| 1033 | #ifdef md_do_align |
| 1034 | just_record_alignment: |
| 1035 | #endif |
| 1036 | |
| 1037 | record_alignment (now_seg, n); |
| 1038 | } |
| 1039 | |
| 1040 | /* For machines where ".align 4" means align to a 4 byte boundary. */ |
| 1041 | void |
| 1042 | s_align_bytes (arg) |
| 1043 | int arg; |
| 1044 | { |
| 1045 | register unsigned int temp; |
| 1046 | char temp_fill; |
| 1047 | unsigned int i = 0; |
| 1048 | unsigned long max_alignment = 1 << 15; |
| 1049 | char *stop = NULL; |
| 1050 | char stopc; |
| 1051 | |
| 1052 | if (flag_mri) |
| 1053 | stop = mri_comment_field (&stopc); |
| 1054 | |
| 1055 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1056 | temp = arg; /* Default value from pseudo-op table */ |
| 1057 | else |
| 1058 | temp = get_absolute_expression (); |
| 1059 | |
| 1060 | if (temp > max_alignment) |
| 1061 | { |
| 1062 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); |
| 1063 | } |
| 1064 | |
| 1065 | /* For the sparc, `.align (1<<n)' actually means `.align n' so we |
| 1066 | have to convert it. */ |
| 1067 | if (temp != 0) |
| 1068 | { |
| 1069 | for (i = 0; (temp & 1) == 0; temp >>= 1, ++i) |
| 1070 | ; |
| 1071 | } |
| 1072 | if (temp != 1) |
| 1073 | as_bad ("Alignment not a power of 2"); |
| 1074 | |
| 1075 | temp = i; |
| 1076 | if (*input_line_pointer == ',') |
| 1077 | { |
| 1078 | input_line_pointer++; |
| 1079 | temp_fill = get_absolute_expression (); |
| 1080 | do_align (temp, &temp_fill); |
| 1081 | } |
| 1082 | else |
| 1083 | do_align (temp, (char *) 0); |
| 1084 | |
| 1085 | if (flag_mri) |
| 1086 | mri_comment_end (stop, stopc); |
| 1087 | |
| 1088 | demand_empty_rest_of_line (); |
| 1089 | } |
| 1090 | |
| 1091 | /* For machines where ".align 4" means align to 2**4 boundary. */ |
| 1092 | void |
| 1093 | s_align_ptwo (ignore) |
| 1094 | int ignore; |
| 1095 | { |
| 1096 | register int temp; |
| 1097 | char temp_fill; |
| 1098 | long max_alignment = 15; |
| 1099 | char *stop = NULL; |
| 1100 | char stopc; |
| 1101 | |
| 1102 | if (flag_mri) |
| 1103 | stop = mri_comment_field (&stopc); |
| 1104 | |
| 1105 | temp = get_absolute_expression (); |
| 1106 | if (temp > max_alignment) |
| 1107 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); |
| 1108 | else if (temp < 0) |
| 1109 | { |
| 1110 | as_bad ("Alignment negative. 0 assumed."); |
| 1111 | temp = 0; |
| 1112 | } |
| 1113 | if (*input_line_pointer == ',') |
| 1114 | { |
| 1115 | input_line_pointer++; |
| 1116 | temp_fill = get_absolute_expression (); |
| 1117 | do_align (temp, &temp_fill); |
| 1118 | } |
| 1119 | else |
| 1120 | do_align (temp, (char *) 0); |
| 1121 | |
| 1122 | if (flag_mri) |
| 1123 | mri_comment_end (stop, stopc); |
| 1124 | |
| 1125 | demand_empty_rest_of_line (); |
| 1126 | } |
| 1127 | |
| 1128 | void |
| 1129 | s_comm (ignore) |
| 1130 | int ignore; |
| 1131 | { |
| 1132 | register char *name; |
| 1133 | register char c; |
| 1134 | register char *p; |
| 1135 | offsetT temp; |
| 1136 | register symbolS *symbolP; |
| 1137 | char *stop = NULL; |
| 1138 | char stopc; |
| 1139 | |
| 1140 | if (flag_mri) |
| 1141 | stop = mri_comment_field (&stopc); |
| 1142 | |
| 1143 | name = input_line_pointer; |
| 1144 | c = get_symbol_end (); |
| 1145 | /* just after name is now '\0' */ |
| 1146 | p = input_line_pointer; |
| 1147 | *p = c; |
| 1148 | SKIP_WHITESPACE (); |
| 1149 | if (*input_line_pointer != ',') |
| 1150 | { |
| 1151 | as_bad ("Expected comma after symbol-name: rest of line ignored."); |
| 1152 | if (flag_mri) |
| 1153 | mri_comment_end (stop, stopc); |
| 1154 | ignore_rest_of_line (); |
| 1155 | return; |
| 1156 | } |
| 1157 | input_line_pointer++; /* skip ',' */ |
| 1158 | if ((temp = get_absolute_expression ()) < 0) |
| 1159 | { |
| 1160 | as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp); |
| 1161 | if (flag_mri) |
| 1162 | mri_comment_end (stop, stopc); |
| 1163 | ignore_rest_of_line (); |
| 1164 | return; |
| 1165 | } |
| 1166 | *p = 0; |
| 1167 | symbolP = symbol_find_or_make (name); |
| 1168 | *p = c; |
| 1169 | if (S_IS_DEFINED (symbolP)) |
| 1170 | { |
| 1171 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
| 1172 | S_GET_NAME (symbolP)); |
| 1173 | if (flag_mri) |
| 1174 | mri_comment_end (stop, stopc); |
| 1175 | ignore_rest_of_line (); |
| 1176 | return; |
| 1177 | } |
| 1178 | if (S_GET_VALUE (symbolP)) |
| 1179 | { |
| 1180 | if (S_GET_VALUE (symbolP) != (valueT) temp) |
| 1181 | as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.", |
| 1182 | S_GET_NAME (symbolP), |
| 1183 | (long) S_GET_VALUE (symbolP), |
| 1184 | (long) temp); |
| 1185 | } |
| 1186 | else |
| 1187 | { |
| 1188 | S_SET_VALUE (symbolP, (valueT) temp); |
| 1189 | S_SET_EXTERNAL (symbolP); |
| 1190 | } |
| 1191 | #ifdef OBJ_VMS |
| 1192 | { |
| 1193 | extern int flag_one; |
| 1194 | if ( (!temp) || !flag_one) |
| 1195 | S_GET_OTHER(symbolP) = const_flag; |
| 1196 | } |
| 1197 | #endif /* not OBJ_VMS */ |
| 1198 | know (symbolP->sy_frag == &zero_address_frag); |
| 1199 | |
| 1200 | if (flag_mri) |
| 1201 | mri_comment_end (stop, stopc); |
| 1202 | |
| 1203 | demand_empty_rest_of_line (); |
| 1204 | } /* s_comm() */ |
| 1205 | |
| 1206 | /* The MRI COMMON pseudo-op. We handle this by creating a common |
| 1207 | symbol with the appropriate name. We make s_space do the right |
| 1208 | thing by increasing the size. */ |
| 1209 | |
| 1210 | void |
| 1211 | s_mri_common (small) |
| 1212 | int small; |
| 1213 | { |
| 1214 | char *name; |
| 1215 | char c; |
| 1216 | char *alc = NULL; |
| 1217 | symbolS *sym; |
| 1218 | offsetT align; |
| 1219 | char *stop = NULL; |
| 1220 | char stopc; |
| 1221 | |
| 1222 | if (! flag_mri) |
| 1223 | { |
| 1224 | s_comm (0); |
| 1225 | return; |
| 1226 | } |
| 1227 | |
| 1228 | stop = mri_comment_field (&stopc); |
| 1229 | |
| 1230 | SKIP_WHITESPACE (); |
| 1231 | |
| 1232 | name = input_line_pointer; |
| 1233 | if (! isdigit ((unsigned char) *name)) |
| 1234 | c = get_symbol_end (); |
| 1235 | else |
| 1236 | { |
| 1237 | do |
| 1238 | { |
| 1239 | ++input_line_pointer; |
| 1240 | } |
| 1241 | while (isdigit ((unsigned char) *input_line_pointer)); |
| 1242 | c = *input_line_pointer; |
| 1243 | *input_line_pointer = '\0'; |
| 1244 | |
| 1245 | if (line_label != NULL) |
| 1246 | { |
| 1247 | alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) |
| 1248 | + (input_line_pointer - name) |
| 1249 | + 1); |
| 1250 | sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); |
| 1251 | name = alc; |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | sym = symbol_find_or_make (name); |
| 1256 | *input_line_pointer = c; |
| 1257 | if (alc != NULL) |
| 1258 | free (alc); |
| 1259 | |
| 1260 | if (*input_line_pointer != ',') |
| 1261 | align = 0; |
| 1262 | else |
| 1263 | { |
| 1264 | ++input_line_pointer; |
| 1265 | align = get_absolute_expression (); |
| 1266 | } |
| 1267 | |
| 1268 | if (S_IS_DEFINED (sym)) |
| 1269 | { |
| 1270 | #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER) |
| 1271 | if (! S_IS_COMMON (sym)) |
| 1272 | #endif |
| 1273 | { |
| 1274 | as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym)); |
| 1275 | mri_comment_end (stop, stopc); |
| 1276 | ignore_rest_of_line (); |
| 1277 | return; |
| 1278 | } |
| 1279 | } |
| 1280 | |
| 1281 | S_SET_EXTERNAL (sym); |
| 1282 | mri_common_symbol = sym; |
| 1283 | |
| 1284 | #ifdef S_SET_ALIGN |
| 1285 | if (align != 0) |
| 1286 | S_SET_ALIGN (sym, align); |
| 1287 | #endif |
| 1288 | |
| 1289 | if (line_label != NULL) |
| 1290 | { |
| 1291 | line_label->sy_value.X_op = O_symbol; |
| 1292 | line_label->sy_value.X_add_symbol = sym; |
| 1293 | line_label->sy_value.X_add_number = S_GET_VALUE (sym); |
| 1294 | line_label->sy_frag = &zero_address_frag; |
| 1295 | S_SET_SEGMENT (line_label, expr_section); |
| 1296 | } |
| 1297 | |
| 1298 | /* FIXME: We just ignore the small argument, which distinguishes |
| 1299 | COMMON and COMMON.S. I don't know what we can do about it. */ |
| 1300 | |
| 1301 | /* Ignore the type and hptype. */ |
| 1302 | if (*input_line_pointer == ',') |
| 1303 | input_line_pointer += 2; |
| 1304 | if (*input_line_pointer == ',') |
| 1305 | input_line_pointer += 2; |
| 1306 | |
| 1307 | mri_comment_end (stop, stopc); |
| 1308 | |
| 1309 | demand_empty_rest_of_line (); |
| 1310 | } |
| 1311 | |
| 1312 | void |
| 1313 | s_data (ignore) |
| 1314 | int ignore; |
| 1315 | { |
| 1316 | segT section; |
| 1317 | register int temp; |
| 1318 | |
| 1319 | temp = get_absolute_expression (); |
| 1320 | if (flag_readonly_data_in_text) |
| 1321 | { |
| 1322 | section = text_section; |
| 1323 | temp += 1000; |
| 1324 | } |
| 1325 | else |
| 1326 | section = data_section; |
| 1327 | |
| 1328 | subseg_set (section, (subsegT) temp); |
| 1329 | |
| 1330 | #ifdef OBJ_VMS |
| 1331 | const_flag = 0; |
| 1332 | #endif |
| 1333 | demand_empty_rest_of_line (); |
| 1334 | } |
| 1335 | |
| 1336 | /* Handle the .appfile pseudo-op. This is automatically generated by |
| 1337 | do_scrub_chars when a preprocessor # line comment is seen with a |
| 1338 | file name. This default definition may be overridden by the object |
| 1339 | or CPU specific pseudo-ops. This function is also the default |
| 1340 | definition for .file; the APPFILE argument is 1 for .appfile, 0 for |
| 1341 | .file. */ |
| 1342 | |
| 1343 | void |
| 1344 | s_app_file (appfile) |
| 1345 | int appfile; |
| 1346 | { |
| 1347 | register char *s; |
| 1348 | int length; |
| 1349 | |
| 1350 | /* Some assemblers tolerate immediately following '"' */ |
| 1351 | if ((s = demand_copy_string (&length)) != 0) |
| 1352 | { |
| 1353 | /* If this is a fake .appfile, a fake newline was inserted into |
| 1354 | the buffer. Passing -2 to new_logical_line tells it to |
| 1355 | account for it. */ |
| 1356 | new_logical_line (s, appfile ? -2 : -1); |
| 1357 | demand_empty_rest_of_line (); |
| 1358 | #ifdef LISTING |
| 1359 | if (listing) |
| 1360 | listing_source_file (s); |
| 1361 | #endif |
| 1362 | } |
| 1363 | #ifdef obj_app_file |
| 1364 | obj_app_file (s); |
| 1365 | #endif |
| 1366 | } |
| 1367 | |
| 1368 | /* Handle the .appline pseudo-op. This is automatically generated by |
| 1369 | do_scrub_chars when a preprocessor # line comment is seen. This |
| 1370 | default definition may be overridden by the object or CPU specific |
| 1371 | pseudo-ops. */ |
| 1372 | |
| 1373 | void |
| 1374 | s_app_line (ignore) |
| 1375 | int ignore; |
| 1376 | { |
| 1377 | int l; |
| 1378 | |
| 1379 | /* The given number is that of the next line. */ |
| 1380 | l = get_absolute_expression () - 1; |
| 1381 | if (l < 0) |
| 1382 | /* Some of the back ends can't deal with non-positive line numbers. |
| 1383 | Besides, it's silly. */ |
| 1384 | as_warn ("Line numbers must be positive; line number %d rejected.", l+1); |
| 1385 | else |
| 1386 | { |
| 1387 | new_logical_line ((char *) NULL, l); |
| 1388 | #ifdef LISTING |
| 1389 | if (listing) |
| 1390 | listing_source_line (l); |
| 1391 | #endif |
| 1392 | } |
| 1393 | demand_empty_rest_of_line (); |
| 1394 | } |
| 1395 | |
| 1396 | /* Handle the .end pseudo-op. Actually, the real work is done in |
| 1397 | read_a_source_file. */ |
| 1398 | |
| 1399 | void |
| 1400 | s_end (ignore) |
| 1401 | int ignore; |
| 1402 | { |
| 1403 | if (flag_mri) |
| 1404 | { |
| 1405 | /* The MRI assembler permits the start symbol to follow .end, |
| 1406 | but we don't support that. */ |
| 1407 | SKIP_WHITESPACE (); |
| 1408 | if (! is_end_of_line[(unsigned char) *input_line_pointer] |
| 1409 | && *input_line_pointer != '*' |
| 1410 | && *input_line_pointer != '!') |
| 1411 | as_warn ("start address not supported"); |
| 1412 | } |
| 1413 | } |
| 1414 | |
| 1415 | /* Handle the MRI fail pseudo-op. */ |
| 1416 | |
| 1417 | void |
| 1418 | s_fail (ignore) |
| 1419 | int ignore; |
| 1420 | { |
| 1421 | offsetT temp; |
| 1422 | char *stop = NULL; |
| 1423 | char stopc; |
| 1424 | |
| 1425 | if (flag_mri) |
| 1426 | stop = mri_comment_field (&stopc); |
| 1427 | |
| 1428 | temp = get_absolute_expression (); |
| 1429 | if (temp >= 500) |
| 1430 | as_warn (".fail %ld encountered", (long) temp); |
| 1431 | else |
| 1432 | as_bad (".fail %ld encountered", (long) temp); |
| 1433 | |
| 1434 | if (flag_mri) |
| 1435 | mri_comment_end (stop, stopc); |
| 1436 | |
| 1437 | demand_empty_rest_of_line (); |
| 1438 | } |
| 1439 | |
| 1440 | void |
| 1441 | s_fill (ignore) |
| 1442 | int ignore; |
| 1443 | { |
| 1444 | long temp_repeat = 0; |
| 1445 | long temp_size = 1; |
| 1446 | register long temp_fill = 0; |
| 1447 | char *p; |
| 1448 | |
| 1449 | |
| 1450 | temp_repeat = get_absolute_expression (); |
| 1451 | if (*input_line_pointer == ',') |
| 1452 | { |
| 1453 | input_line_pointer++; |
| 1454 | temp_size = get_absolute_expression (); |
| 1455 | if (*input_line_pointer == ',') |
| 1456 | { |
| 1457 | input_line_pointer++; |
| 1458 | temp_fill = get_absolute_expression (); |
| 1459 | } |
| 1460 | } |
| 1461 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ |
| 1462 | #define BSD_FILL_SIZE_CROCK_8 (8) |
| 1463 | if (temp_size > BSD_FILL_SIZE_CROCK_8) |
| 1464 | { |
| 1465 | as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); |
| 1466 | temp_size = BSD_FILL_SIZE_CROCK_8; |
| 1467 | } |
| 1468 | if (temp_size < 0) |
| 1469 | { |
| 1470 | as_warn ("Size negative: .fill ignored."); |
| 1471 | temp_size = 0; |
| 1472 | } |
| 1473 | else if (temp_repeat <= 0) |
| 1474 | { |
| 1475 | as_warn ("Repeat < 0, .fill ignored"); |
| 1476 | temp_size = 0; |
| 1477 | } |
| 1478 | |
| 1479 | if (temp_size && !need_pass_2) |
| 1480 | { |
| 1481 | p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0); |
| 1482 | memset (p, 0, (unsigned int) temp_size); |
| 1483 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX |
| 1484 | * flavoured AS. The following bizzare behaviour is to be |
| 1485 | * compatible with above. I guess they tried to take up to 8 |
| 1486 | * bytes from a 4-byte expression and they forgot to sign |
| 1487 | * extend. Un*x Sux. */ |
| 1488 | #define BSD_FILL_SIZE_CROCK_4 (4) |
| 1489 | md_number_to_chars (p, (valueT) temp_fill, |
| 1490 | (temp_size > BSD_FILL_SIZE_CROCK_4 |
| 1491 | ? BSD_FILL_SIZE_CROCK_4 |
| 1492 | : (int) temp_size)); |
| 1493 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) |
| 1494 | * but emits no error message because it seems a legal thing to do. |
| 1495 | * It is a degenerate case of .fill but could be emitted by a compiler. |
| 1496 | */ |
| 1497 | } |
| 1498 | demand_empty_rest_of_line (); |
| 1499 | } |
| 1500 | |
| 1501 | void |
| 1502 | s_globl (ignore) |
| 1503 | int ignore; |
| 1504 | { |
| 1505 | char *name; |
| 1506 | int c; |
| 1507 | symbolS *symbolP; |
| 1508 | char *stop = NULL; |
| 1509 | char stopc; |
| 1510 | |
| 1511 | if (flag_mri) |
| 1512 | stop = mri_comment_field (&stopc); |
| 1513 | |
| 1514 | do |
| 1515 | { |
| 1516 | name = input_line_pointer; |
| 1517 | c = get_symbol_end (); |
| 1518 | symbolP = symbol_find_or_make (name); |
| 1519 | *input_line_pointer = c; |
| 1520 | SKIP_WHITESPACE (); |
| 1521 | S_SET_EXTERNAL (symbolP); |
| 1522 | if (c == ',') |
| 1523 | { |
| 1524 | input_line_pointer++; |
| 1525 | SKIP_WHITESPACE (); |
| 1526 | if (*input_line_pointer == '\n') |
| 1527 | c = '\n'; |
| 1528 | } |
| 1529 | } |
| 1530 | while (c == ','); |
| 1531 | |
| 1532 | if (flag_mri) |
| 1533 | mri_comment_end (stop, stopc); |
| 1534 | |
| 1535 | demand_empty_rest_of_line (); |
| 1536 | } |
| 1537 | |
| 1538 | /* Handle the MRI IRP and IRPC pseudo-ops. */ |
| 1539 | |
| 1540 | void |
| 1541 | s_irp (irpc) |
| 1542 | int irpc; |
| 1543 | { |
| 1544 | char *file; |
| 1545 | unsigned int line; |
| 1546 | sb s; |
| 1547 | const char *err; |
| 1548 | sb out; |
| 1549 | |
| 1550 | as_where (&file, &line); |
| 1551 | |
| 1552 | sb_new (&s); |
| 1553 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1554 | sb_add_char (&s, *input_line_pointer++); |
| 1555 | |
| 1556 | sb_new (&out); |
| 1557 | |
| 1558 | err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); |
| 1559 | if (err != NULL) |
| 1560 | as_bad_where (file, line, "%s", err); |
| 1561 | |
| 1562 | sb_kill (&s); |
| 1563 | |
| 1564 | input_scrub_include_sb (&out, input_line_pointer); |
| 1565 | sb_kill (&out); |
| 1566 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); |
| 1567 | } |
| 1568 | |
| 1569 | void |
| 1570 | s_lcomm (needs_align) |
| 1571 | /* 1 if this was a ".bss" directive, which may require a 3rd argument |
| 1572 | (alignment); 0 if it was an ".lcomm" (2 args only) */ |
| 1573 | int needs_align; |
| 1574 | { |
| 1575 | register char *name; |
| 1576 | register char c; |
| 1577 | register char *p; |
| 1578 | register int temp; |
| 1579 | register symbolS *symbolP; |
| 1580 | segT current_seg = now_seg; |
| 1581 | subsegT current_subseg = now_subseg; |
| 1582 | const int max_alignment = 15; |
| 1583 | int align = 0; |
| 1584 | segT bss_seg = bss_section; |
| 1585 | |
| 1586 | name = input_line_pointer; |
| 1587 | c = get_symbol_end (); |
| 1588 | p = input_line_pointer; |
| 1589 | *p = c; |
| 1590 | SKIP_WHITESPACE (); |
| 1591 | |
| 1592 | /* Accept an optional comma after the name. The comma used to be |
| 1593 | required, but Irix 5 cc does not generate it. */ |
| 1594 | if (*input_line_pointer == ',') |
| 1595 | { |
| 1596 | ++input_line_pointer; |
| 1597 | SKIP_WHITESPACE (); |
| 1598 | } |
| 1599 | |
| 1600 | if (*input_line_pointer == '\n') |
| 1601 | { |
| 1602 | as_bad ("Missing size expression"); |
| 1603 | return; |
| 1604 | } |
| 1605 | |
| 1606 | if ((temp = get_absolute_expression ()) < 0) |
| 1607 | { |
| 1608 | as_warn ("BSS length (%d.) <0! Ignored.", temp); |
| 1609 | ignore_rest_of_line (); |
| 1610 | return; |
| 1611 | } |
| 1612 | |
| 1613 | #if defined (TC_MIPS) || defined (TC_ALPHA) |
| 1614 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour |
| 1615 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) |
| 1616 | { |
| 1617 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ |
| 1618 | if (temp <= bfd_get_gp_size (stdoutput)) |
| 1619 | { |
| 1620 | bss_seg = subseg_new (".sbss", 1); |
| 1621 | seg_info (bss_seg)->bss = 1; |
| 1622 | } |
| 1623 | } |
| 1624 | #endif |
| 1625 | if (!needs_align) |
| 1626 | { |
| 1627 | /* FIXME. This needs to be machine independent. */ |
| 1628 | if (temp >= 8) |
| 1629 | align = 3; |
| 1630 | else if (temp >= 4) |
| 1631 | align = 2; |
| 1632 | else if (temp >= 2) |
| 1633 | align = 1; |
| 1634 | else |
| 1635 | align = 0; |
| 1636 | |
| 1637 | record_alignment(bss_seg, align); |
| 1638 | } |
| 1639 | |
| 1640 | if (needs_align) |
| 1641 | { |
| 1642 | align = 0; |
| 1643 | SKIP_WHITESPACE (); |
| 1644 | if (*input_line_pointer != ',') |
| 1645 | { |
| 1646 | as_bad ("Expected comma after size"); |
| 1647 | ignore_rest_of_line (); |
| 1648 | return; |
| 1649 | } |
| 1650 | input_line_pointer++; |
| 1651 | SKIP_WHITESPACE (); |
| 1652 | if (*input_line_pointer == '\n') |
| 1653 | { |
| 1654 | as_bad ("Missing alignment"); |
| 1655 | return; |
| 1656 | } |
| 1657 | align = get_absolute_expression (); |
| 1658 | if (align > max_alignment) |
| 1659 | { |
| 1660 | align = max_alignment; |
| 1661 | as_warn ("Alignment too large: %d. assumed.", align); |
| 1662 | } |
| 1663 | else if (align < 0) |
| 1664 | { |
| 1665 | align = 0; |
| 1666 | as_warn ("Alignment negative. 0 assumed."); |
| 1667 | } |
| 1668 | record_alignment (bss_seg, align); |
| 1669 | } /* if needs align */ |
| 1670 | else |
| 1671 | { |
| 1672 | /* Assume some objects may require alignment on some systems. */ |
| 1673 | #ifdef TC_ALPHA |
| 1674 | if (temp > 1) |
| 1675 | { |
| 1676 | align = ffs (temp) - 1; |
| 1677 | if (temp % (1 << align)) |
| 1678 | abort (); |
| 1679 | } |
| 1680 | #endif |
| 1681 | } |
| 1682 | |
| 1683 | *p = 0; |
| 1684 | symbolP = symbol_find_or_make (name); |
| 1685 | *p = c; |
| 1686 | |
| 1687 | if ( |
| 1688 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
| 1689 | S_GET_OTHER (symbolP) == 0 && |
| 1690 | S_GET_DESC (symbolP) == 0 && |
| 1691 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
| 1692 | (S_GET_SEGMENT (symbolP) == bss_seg |
| 1693 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) |
| 1694 | { |
| 1695 | char *pfrag; |
| 1696 | |
| 1697 | subseg_set (bss_seg, 1); |
| 1698 | |
| 1699 | if (align) |
| 1700 | frag_align (align, 0); |
| 1701 | /* detach from old frag */ |
| 1702 | if (S_GET_SEGMENT (symbolP) == bss_seg) |
| 1703 | symbolP->sy_frag->fr_symbol = NULL; |
| 1704 | |
| 1705 | symbolP->sy_frag = frag_now; |
| 1706 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
| 1707 | temp, (char *)0); |
| 1708 | *pfrag = 0; |
| 1709 | |
| 1710 | S_SET_SEGMENT (symbolP, bss_seg); |
| 1711 | |
| 1712 | #ifdef OBJ_COFF |
| 1713 | /* The symbol may already have been created with a preceding |
| 1714 | ".globl" directive -- be careful not to step on storage class |
| 1715 | in that case. Otherwise, set it to static. */ |
| 1716 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) |
| 1717 | { |
| 1718 | S_SET_STORAGE_CLASS (symbolP, C_STAT); |
| 1719 | } |
| 1720 | #endif /* OBJ_COFF */ |
| 1721 | } |
| 1722 | else |
| 1723 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
| 1724 | S_GET_NAME (symbolP)); |
| 1725 | |
| 1726 | subseg_set (current_seg, current_subseg); |
| 1727 | |
| 1728 | demand_empty_rest_of_line (); |
| 1729 | } /* s_lcomm() */ |
| 1730 | |
| 1731 | void |
| 1732 | s_lsym (ignore) |
| 1733 | int ignore; |
| 1734 | { |
| 1735 | register char *name; |
| 1736 | register char c; |
| 1737 | register char *p; |
| 1738 | expressionS exp; |
| 1739 | register symbolS *symbolP; |
| 1740 | |
| 1741 | /* we permit ANY defined expression: BSD4.2 demands constants */ |
| 1742 | name = input_line_pointer; |
| 1743 | c = get_symbol_end (); |
| 1744 | p = input_line_pointer; |
| 1745 | *p = c; |
| 1746 | SKIP_WHITESPACE (); |
| 1747 | if (*input_line_pointer != ',') |
| 1748 | { |
| 1749 | *p = 0; |
| 1750 | as_bad ("Expected comma after name \"%s\"", name); |
| 1751 | *p = c; |
| 1752 | ignore_rest_of_line (); |
| 1753 | return; |
| 1754 | } |
| 1755 | input_line_pointer++; |
| 1756 | expression (&exp); |
| 1757 | if (exp.X_op != O_constant |
| 1758 | && exp.X_op != O_register) |
| 1759 | { |
| 1760 | as_bad ("bad expression"); |
| 1761 | ignore_rest_of_line (); |
| 1762 | return; |
| 1763 | } |
| 1764 | *p = 0; |
| 1765 | symbolP = symbol_find_or_make (name); |
| 1766 | |
| 1767 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && |
| 1768 | symbolP->sy_desc == 0) out of this test because coff doesn't have |
| 1769 | those fields, and I can't see when they'd ever be tripped. I |
| 1770 | don't think I understand why they were here so I may have |
| 1771 | introduced a bug. As recently as 1.37 didn't have this test |
| 1772 | anyway. xoxorich. */ |
| 1773 | |
| 1774 | if (S_GET_SEGMENT (symbolP) == undefined_section |
| 1775 | && S_GET_VALUE (symbolP) == 0) |
| 1776 | { |
| 1777 | /* The name might be an undefined .global symbol; be sure to |
| 1778 | keep the "external" bit. */ |
| 1779 | S_SET_SEGMENT (symbolP, |
| 1780 | (exp.X_op == O_constant |
| 1781 | ? absolute_section |
| 1782 | : reg_section)); |
| 1783 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
| 1784 | } |
| 1785 | else |
| 1786 | { |
| 1787 | as_bad ("Symbol %s already defined", name); |
| 1788 | } |
| 1789 | *p = c; |
| 1790 | demand_empty_rest_of_line (); |
| 1791 | } /* s_lsym() */ |
| 1792 | |
| 1793 | /* Read a line into an sb. */ |
| 1794 | |
| 1795 | static int |
| 1796 | get_line_sb (line) |
| 1797 | sb *line; |
| 1798 | { |
| 1799 | if (input_line_pointer >= buffer_limit) |
| 1800 | { |
| 1801 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); |
| 1802 | if (buffer_limit == 0) |
| 1803 | return 0; |
| 1804 | } |
| 1805 | |
| 1806 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1807 | sb_add_char (line, *input_line_pointer++); |
| 1808 | while (is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1809 | { |
| 1810 | if (*input_line_pointer == '\n') |
| 1811 | { |
| 1812 | bump_line_counters (); |
| 1813 | LISTING_NEWLINE (); |
| 1814 | } |
| 1815 | ++input_line_pointer; |
| 1816 | } |
| 1817 | return 1; |
| 1818 | } |
| 1819 | |
| 1820 | /* Define a macro. This is an interface to macro.c, which is shared |
| 1821 | between gas and gasp. */ |
| 1822 | |
| 1823 | void |
| 1824 | s_macro (ignore) |
| 1825 | int ignore; |
| 1826 | { |
| 1827 | char *file; |
| 1828 | unsigned int line; |
| 1829 | sb s; |
| 1830 | sb label; |
| 1831 | const char *err; |
| 1832 | |
| 1833 | as_where (&file, &line); |
| 1834 | |
| 1835 | sb_new (&s); |
| 1836 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) |
| 1837 | sb_add_char (&s, *input_line_pointer++); |
| 1838 | |
| 1839 | sb_new (&label); |
| 1840 | if (line_label != NULL) |
| 1841 | sb_add_string (&label, S_GET_NAME (line_label)); |
| 1842 | |
| 1843 | demand_empty_rest_of_line (); |
| 1844 | |
| 1845 | err = define_macro (0, &s, &label, get_line_sb); |
| 1846 | if (err != NULL) |
| 1847 | as_bad_where (file, line, "%s", err); |
| 1848 | else |
| 1849 | { |
| 1850 | if (line_label != NULL) |
| 1851 | { |
| 1852 | S_SET_SEGMENT (line_label, undefined_section); |
| 1853 | S_SET_VALUE (line_label, 0); |
| 1854 | line_label->sy_frag = &zero_address_frag; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | sb_kill (&s); |
| 1859 | } |
| 1860 | |
| 1861 | /* Handle the .mexit pseudo-op, which immediately exits a macro |
| 1862 | expansion. */ |
| 1863 | |
| 1864 | void |
| 1865 | s_mexit (ignore) |
| 1866 | int ignore; |
| 1867 | { |
| 1868 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); |
| 1869 | } |
| 1870 | |
| 1871 | /* Handle changing the location counter. */ |
| 1872 | |
| 1873 | static void |
| 1874 | do_org (segment, exp, fill) |
| 1875 | segT segment; |
| 1876 | expressionS *exp; |
| 1877 | int fill; |
| 1878 | { |
| 1879 | if (segment != now_seg && segment != absolute_section) |
| 1880 | as_bad ("invalid segment \"%s\"; segment \"%s\" assumed", |
| 1881 | segment_name (segment), segment_name (now_seg)); |
| 1882 | |
| 1883 | if (now_seg == absolute_section) |
| 1884 | { |
| 1885 | if (fill != 0) |
| 1886 | as_warn ("ignoring fill value in absolute section"); |
| 1887 | if (exp->X_op != O_constant) |
| 1888 | { |
| 1889 | as_bad ("only constant offsets supported in absolute section"); |
| 1890 | exp->X_add_number = 0; |
| 1891 | } |
| 1892 | abs_section_offset = exp->X_add_number; |
| 1893 | } |
| 1894 | else |
| 1895 | { |
| 1896 | char *p; |
| 1897 | |
| 1898 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, |
| 1899 | exp->X_add_number, (char *) NULL); |
| 1900 | *p = fill; |
| 1901 | } |
| 1902 | } |
| 1903 | |
| 1904 | void |
| 1905 | s_org (ignore) |
| 1906 | int ignore; |
| 1907 | { |
| 1908 | register segT segment; |
| 1909 | expressionS exp; |
| 1910 | register long temp_fill; |
| 1911 | |
| 1912 | /* The MRI assembler has a different meaning for .org. It means to |
| 1913 | create an absolute section at a given address. We can't support |
| 1914 | that--use a linker script instead. */ |
| 1915 | if (flag_mri) |
| 1916 | { |
| 1917 | as_bad ("MRI style ORG pseudo-op not supported"); |
| 1918 | ignore_rest_of_line (); |
| 1919 | return; |
| 1920 | } |
| 1921 | |
| 1922 | /* Don't believe the documentation of BSD 4.2 AS. There is no such |
| 1923 | thing as a sub-segment-relative origin. Any absolute origin is |
| 1924 | given a warning, then assumed to be segment-relative. Any |
| 1925 | segmented origin expression ("foo+42") had better be in the right |
| 1926 | segment or the .org is ignored. |
| 1927 | |
| 1928 | BSD 4.2 AS warns if you try to .org backwards. We cannot because |
| 1929 | we never know sub-segment sizes when we are reading code. BSD |
| 1930 | will crash trying to emit negative numbers of filler bytes in |
| 1931 | certain .orgs. We don't crash, but see as-write for that code. |
| 1932 | |
| 1933 | Don't make frag if need_pass_2==1. */ |
| 1934 | segment = get_known_segmented_expression (&exp); |
| 1935 | if (*input_line_pointer == ',') |
| 1936 | { |
| 1937 | input_line_pointer++; |
| 1938 | temp_fill = get_absolute_expression (); |
| 1939 | } |
| 1940 | else |
| 1941 | temp_fill = 0; |
| 1942 | |
| 1943 | if (!need_pass_2) |
| 1944 | do_org (segment, &exp, temp_fill); |
| 1945 | |
| 1946 | demand_empty_rest_of_line (); |
| 1947 | } /* s_org() */ |
| 1948 | |
| 1949 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be |
| 1950 | called by the obj-format routine which handles section changing |
| 1951 | when in MRI mode. It will create a new section, and return it. It |
| 1952 | will set *TYPE to the section type: one of '\0' (unspecified), 'C' |
| 1953 | (code), 'D' (data), 'M' (mixed), or 'R' (romable). If |
| 1954 | BFD_ASSEMBLER is defined, the flags will be set in the section. */ |
| 1955 | |
| 1956 | void |
| 1957 | s_mri_sect (type) |
| 1958 | char *type; |
| 1959 | { |
| 1960 | char *name; |
| 1961 | char c; |
| 1962 | segT seg; |
| 1963 | |
| 1964 | SKIP_WHITESPACE (); |
| 1965 | |
| 1966 | name = input_line_pointer; |
| 1967 | if (! isdigit ((unsigned char) *name)) |
| 1968 | c = get_symbol_end (); |
| 1969 | else |
| 1970 | { |
| 1971 | do |
| 1972 | { |
| 1973 | ++input_line_pointer; |
| 1974 | } |
| 1975 | while (isdigit ((unsigned char) *input_line_pointer)); |
| 1976 | c = *input_line_pointer; |
| 1977 | *input_line_pointer = '\0'; |
| 1978 | } |
| 1979 | |
| 1980 | name = strdup (name); |
| 1981 | if (name == NULL) |
| 1982 | as_fatal ("virtual memory exhausted"); |
| 1983 | |
| 1984 | *input_line_pointer = c; |
| 1985 | |
| 1986 | seg = subseg_new (name, 0); |
| 1987 | |
| 1988 | if (*input_line_pointer == ',') |
| 1989 | { |
| 1990 | int align; |
| 1991 | |
| 1992 | ++input_line_pointer; |
| 1993 | align = get_absolute_expression (); |
| 1994 | record_alignment (seg, align); |
| 1995 | } |
| 1996 | |
| 1997 | *type = '\0'; |
| 1998 | if (*input_line_pointer == ',') |
| 1999 | { |
| 2000 | c = *++input_line_pointer; |
| 2001 | c = toupper ((unsigned char) c); |
| 2002 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') |
| 2003 | *type = c; |
| 2004 | else |
| 2005 | as_bad ("unrecognized section type"); |
| 2006 | ++input_line_pointer; |
| 2007 | |
| 2008 | #ifdef BFD_ASSEMBLER |
| 2009 | { |
| 2010 | flagword flags; |
| 2011 | |
| 2012 | flags = SEC_NO_FLAGS; |
| 2013 | if (*type == 'C') |
| 2014 | flags = SEC_CODE; |
| 2015 | else if (*type == 'D') |
| 2016 | flags = SEC_DATA; |
| 2017 | else if (*type == 'R') |
| 2018 | flags = SEC_ROM; |
| 2019 | if (flags != SEC_NO_FLAGS) |
| 2020 | { |
| 2021 | if (! bfd_set_section_flags (stdoutput, seg, flags)) |
| 2022 | as_warn ("error setting flags for \"%s\": %s", |
| 2023 | bfd_section_name (stdoutput, seg), |
| 2024 | bfd_errmsg (bfd_get_error ())); |
| 2025 | } |
| 2026 | } |
| 2027 | #endif |
| 2028 | } |
| 2029 | |
| 2030 | /* Ignore the HP type. */ |
| 2031 | if (*input_line_pointer == ',') |
| 2032 | input_line_pointer += 2; |
| 2033 | |
| 2034 | demand_empty_rest_of_line (); |
| 2035 | } |
| 2036 | |
| 2037 | /* Handle the .rept pseudo-op. */ |
| 2038 | |
| 2039 | void |
| 2040 | s_rept (ignore) |
| 2041 | int ignore; |
| 2042 | { |
| 2043 | int count; |
| 2044 | sb one; |
| 2045 | sb many; |
| 2046 | |
| 2047 | count = get_absolute_expression (); |
| 2048 | |
| 2049 | sb_new (&one); |
| 2050 | if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb)) |
| 2051 | { |
| 2052 | as_bad ("rept without endr"); |
| 2053 | return; |
| 2054 | } |
| 2055 | |
| 2056 | sb_new (&many); |
| 2057 | while (count-- > 0) |
| 2058 | sb_add_sb (&many, &one); |
| 2059 | |
| 2060 | sb_kill (&one); |
| 2061 | |
| 2062 | input_scrub_include_sb (&many, input_line_pointer); |
| 2063 | sb_kill (&many); |
| 2064 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); |
| 2065 | } |
| 2066 | |
| 2067 | void |
| 2068 | s_set (ignore) |
| 2069 | int ignore; |
| 2070 | { |
| 2071 | register char *name; |
| 2072 | register char delim; |
| 2073 | register char *end_name; |
| 2074 | register symbolS *symbolP; |
| 2075 | |
| 2076 | /* |
| 2077 | * Especial apologies for the random logic: |
| 2078 | * this just grew, and could be parsed much more simply! |
| 2079 | * Dean in haste. |
| 2080 | */ |
| 2081 | name = input_line_pointer; |
| 2082 | delim = get_symbol_end (); |
| 2083 | end_name = input_line_pointer; |
| 2084 | *end_name = delim; |
| 2085 | SKIP_WHITESPACE (); |
| 2086 | |
| 2087 | if (*input_line_pointer != ',') |
| 2088 | { |
| 2089 | *end_name = 0; |
| 2090 | as_bad ("Expected comma after name \"%s\"", name); |
| 2091 | *end_name = delim; |
| 2092 | ignore_rest_of_line (); |
| 2093 | return; |
| 2094 | } |
| 2095 | |
| 2096 | input_line_pointer++; |
| 2097 | *end_name = 0; |
| 2098 | |
| 2099 | if (name[0] == '.' && name[1] == '\0') |
| 2100 | { |
| 2101 | /* Turn '. = mumble' into a .org mumble */ |
| 2102 | register segT segment; |
| 2103 | expressionS exp; |
| 2104 | |
| 2105 | segment = get_known_segmented_expression (&exp); |
| 2106 | |
| 2107 | if (!need_pass_2) |
| 2108 | do_org (segment, &exp, 0); |
| 2109 | |
| 2110 | *end_name = delim; |
| 2111 | return; |
| 2112 | } |
| 2113 | |
| 2114 | if ((symbolP = symbol_find (name)) == NULL |
| 2115 | && (symbolP = md_undefined_symbol (name)) == NULL) |
| 2116 | { |
| 2117 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); |
| 2118 | #ifdef OBJ_COFF |
| 2119 | /* "set" symbols are local unless otherwise specified. */ |
| 2120 | SF_SET_LOCAL (symbolP); |
| 2121 | #endif /* OBJ_COFF */ |
| 2122 | |
| 2123 | } /* make a new symbol */ |
| 2124 | |
| 2125 | symbol_table_insert (symbolP); |
| 2126 | |
| 2127 | *end_name = delim; |
| 2128 | pseudo_set (symbolP); |
| 2129 | demand_empty_rest_of_line (); |
| 2130 | } /* s_set() */ |
| 2131 | |
| 2132 | void |
| 2133 | s_space (mult) |
| 2134 | int mult; |
| 2135 | { |
| 2136 | expressionS exp; |
| 2137 | long temp_fill; |
| 2138 | char *p = 0; |
| 2139 | char *stop = NULL; |
| 2140 | char stopc; |
| 2141 | |
| 2142 | #ifdef md_flush_pending_output |
| 2143 | md_flush_pending_output (); |
| 2144 | #endif |
| 2145 | |
| 2146 | if (flag_mri) |
| 2147 | stop = mri_comment_field (&stopc); |
| 2148 | |
| 2149 | /* Just like .fill, but temp_size = 1 */ |
| 2150 | expression (&exp); |
| 2151 | if (exp.X_op == O_constant) |
| 2152 | { |
| 2153 | long repeat; |
| 2154 | |
| 2155 | repeat = exp.X_add_number; |
| 2156 | if (mult) |
| 2157 | repeat *= mult; |
| 2158 | if (repeat <= 0) |
| 2159 | { |
| 2160 | if (! flag_mri || repeat < 0) |
| 2161 | as_warn (".space repeat count is %s, ignored", |
| 2162 | repeat ? "negative" : "zero"); |
| 2163 | goto getout; |
| 2164 | } |
| 2165 | |
| 2166 | /* If we are in the absolute section, just bump the offset. */ |
| 2167 | if (now_seg == absolute_section) |
| 2168 | { |
| 2169 | abs_section_offset += repeat; |
| 2170 | goto getout; |
| 2171 | } |
| 2172 | |
| 2173 | /* If we are secretly in an MRI common section, then creating |
| 2174 | space just increases the size of the common symbol. */ |
| 2175 | if (mri_common_symbol != NULL) |
| 2176 | { |
| 2177 | S_SET_VALUE (mri_common_symbol, |
| 2178 | S_GET_VALUE (mri_common_symbol) + repeat); |
| 2179 | goto getout; |
| 2180 | } |
| 2181 | |
| 2182 | if (!need_pass_2) |
| 2183 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, |
| 2184 | repeat, (char *) 0); |
| 2185 | } |
| 2186 | else |
| 2187 | { |
| 2188 | if (now_seg == absolute_section) |
| 2189 | { |
| 2190 | as_bad ("space allocation too complex in absolute section"); |
| 2191 | subseg_set (text_section, 0); |
| 2192 | } |
| 2193 | if (mri_common_symbol != NULL) |
| 2194 | { |
| 2195 | as_bad ("space allocation too complex in common section"); |
| 2196 | mri_common_symbol = NULL; |
| 2197 | } |
| 2198 | if (!need_pass_2) |
| 2199 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, |
| 2200 | make_expr_symbol (&exp), 0L, (char *) 0); |
| 2201 | } |
| 2202 | SKIP_WHITESPACE (); |
| 2203 | if (*input_line_pointer == ',') |
| 2204 | { |
| 2205 | input_line_pointer++; |
| 2206 | temp_fill = get_absolute_expression (); |
| 2207 | } |
| 2208 | else |
| 2209 | { |
| 2210 | temp_fill = 0; |
| 2211 | } |
| 2212 | if (p) |
| 2213 | { |
| 2214 | *p = temp_fill; |
| 2215 | } |
| 2216 | |
| 2217 | getout: |
| 2218 | if (flag_mri) |
| 2219 | mri_comment_end (stop, stopc); |
| 2220 | |
| 2221 | demand_empty_rest_of_line (); |
| 2222 | } |
| 2223 | |
| 2224 | /* This is like s_space, but the value is a floating point number with |
| 2225 | the given precision. This is for the MRI dcb.s pseudo-op and |
| 2226 | friends. */ |
| 2227 | |
| 2228 | void |
| 2229 | s_float_space (float_type) |
| 2230 | int float_type; |
| 2231 | { |
| 2232 | offsetT count; |
| 2233 | int flen; |
| 2234 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; |
| 2235 | char *stop = NULL; |
| 2236 | char stopc; |
| 2237 | |
| 2238 | if (flag_mri) |
| 2239 | stop = mri_comment_field (&stopc); |
| 2240 | |
| 2241 | count = get_absolute_expression (); |
| 2242 | |
| 2243 | SKIP_WHITESPACE (); |
| 2244 | if (*input_line_pointer != ',') |
| 2245 | { |
| 2246 | as_bad ("missing value"); |
| 2247 | if (flag_mri) |
| 2248 | mri_comment_end (stop, stopc); |
| 2249 | ignore_rest_of_line (); |
| 2250 | return; |
| 2251 | } |
| 2252 | |
| 2253 | ++input_line_pointer; |
| 2254 | |
| 2255 | SKIP_WHITESPACE (); |
| 2256 | |
| 2257 | /* Skip any 0{letter} that may be present. Don't even check if the |
| 2258 | * letter is legal. */ |
| 2259 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) |
| 2260 | input_line_pointer += 2; |
| 2261 | |
| 2262 | /* Accept :xxxx, where the x's are hex digits, for a floating point |
| 2263 | with the exact digits specified. */ |
| 2264 | if (input_line_pointer[0] == ':') |
| 2265 | { |
| 2266 | flen = hex_float (float_type, temp); |
| 2267 | if (flen < 0) |
| 2268 | { |
| 2269 | if (flag_mri) |
| 2270 | mri_comment_end (stop, stopc); |
| 2271 | ignore_rest_of_line (); |
| 2272 | return; |
| 2273 | } |
| 2274 | } |
| 2275 | else |
| 2276 | { |
| 2277 | char *err; |
| 2278 | |
| 2279 | err = md_atof (float_type, temp, &flen); |
| 2280 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); |
| 2281 | know (flen > 0); |
| 2282 | if (err) |
| 2283 | { |
| 2284 | as_bad ("Bad floating literal: %s", err); |
| 2285 | if (flag_mri) |
| 2286 | mri_comment_end (stop, stopc); |
| 2287 | ignore_rest_of_line (); |
| 2288 | return; |
| 2289 | } |
| 2290 | } |
| 2291 | |
| 2292 | while (--count >= 0) |
| 2293 | { |
| 2294 | char *p; |
| 2295 | |
| 2296 | p = frag_more (flen); |
| 2297 | memcpy (p, temp, (unsigned int) flen); |
| 2298 | } |
| 2299 | |
| 2300 | if (flag_mri) |
| 2301 | mri_comment_end (stop, stopc); |
| 2302 | |
| 2303 | demand_empty_rest_of_line (); |
| 2304 | } |
| 2305 | |
| 2306 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ |
| 2307 | |
| 2308 | void |
| 2309 | s_struct (ignore) |
| 2310 | int ignore; |
| 2311 | { |
| 2312 | char *stop = NULL; |
| 2313 | char stopc; |
| 2314 | |
| 2315 | if (flag_mri) |
| 2316 | stop = mri_comment_field (&stopc); |
| 2317 | abs_section_offset = get_absolute_expression (); |
| 2318 | subseg_set (absolute_section, 0); |
| 2319 | if (flag_mri) |
| 2320 | mri_comment_end (stop, stopc); |
| 2321 | demand_empty_rest_of_line (); |
| 2322 | } |
| 2323 | |
| 2324 | void |
| 2325 | s_text (ignore) |
| 2326 | int ignore; |
| 2327 | { |
| 2328 | register int temp; |
| 2329 | |
| 2330 | temp = get_absolute_expression (); |
| 2331 | subseg_set (text_section, (subsegT) temp); |
| 2332 | demand_empty_rest_of_line (); |
| 2333 | #ifdef OBJ_VMS |
| 2334 | const_flag &= ~IN_DEFAULT_SECTION; |
| 2335 | #endif |
| 2336 | } /* s_text() */ |
| 2337 | \f |
| 2338 | |
| 2339 | void |
| 2340 | demand_empty_rest_of_line () |
| 2341 | { |
| 2342 | SKIP_WHITESPACE (); |
| 2343 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
| 2344 | { |
| 2345 | input_line_pointer++; |
| 2346 | } |
| 2347 | else |
| 2348 | { |
| 2349 | ignore_rest_of_line (); |
| 2350 | } |
| 2351 | /* Return having already swallowed end-of-line. */ |
| 2352 | } /* Return pointing just after end-of-line. */ |
| 2353 | |
| 2354 | void |
| 2355 | ignore_rest_of_line () /* For suspect lines: gives warning. */ |
| 2356 | { |
| 2357 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 2358 | { |
| 2359 | if (isprint (*input_line_pointer)) |
| 2360 | as_bad ("Rest of line ignored. First ignored character is `%c'.", |
| 2361 | *input_line_pointer); |
| 2362 | else |
| 2363 | as_bad ("Rest of line ignored. First ignored character valued 0x%x.", |
| 2364 | *input_line_pointer); |
| 2365 | while (input_line_pointer < buffer_limit |
| 2366 | && !is_end_of_line[(unsigned char) *input_line_pointer]) |
| 2367 | { |
| 2368 | input_line_pointer++; |
| 2369 | } |
| 2370 | } |
| 2371 | input_line_pointer++; /* Return pointing just after end-of-line. */ |
| 2372 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); |
| 2373 | } |
| 2374 | |
| 2375 | /* |
| 2376 | * pseudo_set() |
| 2377 | * |
| 2378 | * In: Pointer to a symbol. |
| 2379 | * Input_line_pointer->expression. |
| 2380 | * |
| 2381 | * Out: Input_line_pointer->just after any whitespace after expression. |
| 2382 | * Tried to set symbol to value of expression. |
| 2383 | * Will change symbols type, value, and frag; |
| 2384 | */ |
| 2385 | void |
| 2386 | pseudo_set (symbolP) |
| 2387 | symbolS *symbolP; |
| 2388 | { |
| 2389 | expressionS exp; |
| 2390 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
| 2391 | int ext; |
| 2392 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
| 2393 | |
| 2394 | know (symbolP); /* NULL pointer is logic error. */ |
| 2395 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
| 2396 | ext = S_IS_EXTERNAL (symbolP); |
| 2397 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
| 2398 | |
| 2399 | (void) expression (&exp); |
| 2400 | |
| 2401 | if (exp.X_op == O_illegal) |
| 2402 | as_bad ("illegal expression; zero assumed"); |
| 2403 | else if (exp.X_op == O_absent) |
| 2404 | as_bad ("missing expression; zero assumed"); |
| 2405 | else if (exp.X_op == O_big) |
| 2406 | as_bad ("%s number invalid; zero assumed", |
| 2407 | exp.X_add_number > 0 ? "bignum" : "floating point"); |
| 2408 | else if (exp.X_op == O_subtract |
| 2409 | && (S_GET_SEGMENT (exp.X_add_symbol) |
| 2410 | == S_GET_SEGMENT (exp.X_op_symbol)) |
| 2411 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) |
| 2412 | && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) |
| 2413 | { |
| 2414 | exp.X_op = O_constant; |
| 2415 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) |
| 2416 | - S_GET_VALUE (exp.X_op_symbol)); |
| 2417 | } |
| 2418 | |
| 2419 | switch (exp.X_op) |
| 2420 | { |
| 2421 | case O_illegal: |
| 2422 | case O_absent: |
| 2423 | case O_big: |
| 2424 | exp.X_add_number = 0; |
| 2425 | /* Fall through. */ |
| 2426 | case O_constant: |
| 2427 | S_SET_SEGMENT (symbolP, absolute_section); |
| 2428 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
| 2429 | if (ext) |
| 2430 | S_SET_EXTERNAL (symbolP); |
| 2431 | else |
| 2432 | S_CLEAR_EXTERNAL (symbolP); |
| 2433 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
| 2434 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
| 2435 | symbolP->sy_frag = &zero_address_frag; |
| 2436 | break; |
| 2437 | |
| 2438 | case O_register: |
| 2439 | S_SET_SEGMENT (symbolP, reg_section); |
| 2440 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
| 2441 | symbolP->sy_frag = &zero_address_frag; |
| 2442 | break; |
| 2443 | |
| 2444 | case O_symbol: |
| 2445 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section |
| 2446 | || exp.X_add_number != 0) |
| 2447 | symbolP->sy_value = exp; |
| 2448 | else |
| 2449 | { |
| 2450 | symbolS *s = exp.X_add_symbol; |
| 2451 | |
| 2452 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); |
| 2453 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
| 2454 | if (ext) |
| 2455 | S_SET_EXTERNAL (symbolP); |
| 2456 | else |
| 2457 | S_CLEAR_EXTERNAL (symbolP); |
| 2458 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
| 2459 | S_SET_VALUE (symbolP, |
| 2460 | exp.X_add_number + S_GET_VALUE (s)); |
| 2461 | symbolP->sy_frag = s->sy_frag; |
| 2462 | copy_symbol_attributes (symbolP, s); |
| 2463 | } |
| 2464 | break; |
| 2465 | |
| 2466 | default: |
| 2467 | /* The value is some complex expression. |
| 2468 | FIXME: Should we set the segment to anything? */ |
| 2469 | symbolP->sy_value = exp; |
| 2470 | break; |
| 2471 | } |
| 2472 | } |
| 2473 | \f |
| 2474 | /* |
| 2475 | * cons() |
| 2476 | * |
| 2477 | * CONStruct more frag of .bytes, or .words etc. |
| 2478 | * Should need_pass_2 be 1 then emit no frag(s). |
| 2479 | * This understands EXPRESSIONS. |
| 2480 | * |
| 2481 | * Bug (?) |
| 2482 | * |
| 2483 | * This has a split personality. We use expression() to read the |
| 2484 | * value. We can detect if the value won't fit in a byte or word. |
| 2485 | * But we can't detect if expression() discarded significant digits |
| 2486 | * in the case of a long. Not worth the crocks required to fix it. |
| 2487 | */ |
| 2488 | |
| 2489 | /* Select a parser for cons expressions. */ |
| 2490 | |
| 2491 | /* Some targets need to parse the expression in various fancy ways. |
| 2492 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like |
| 2493 | (for example, the HPPA does this). Otherwise, you can define |
| 2494 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or |
| 2495 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these |
| 2496 | are defined, which is the normal case, then only simple expressions |
| 2497 | are permitted. */ |
| 2498 | |
| 2499 | static void |
| 2500 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); |
| 2501 | |
| 2502 | #ifndef TC_PARSE_CONS_EXPRESSION |
| 2503 | #ifdef BITFIELD_CONS_EXPRESSIONS |
| 2504 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) |
| 2505 | static void |
| 2506 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); |
| 2507 | #endif |
| 2508 | #ifdef REPEAT_CONS_EXPRESSIONS |
| 2509 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) |
| 2510 | static void |
| 2511 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); |
| 2512 | #endif |
| 2513 | |
| 2514 | /* If we haven't gotten one yet, just call expression. */ |
| 2515 | #ifndef TC_PARSE_CONS_EXPRESSION |
| 2516 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) |
| 2517 | #endif |
| 2518 | #endif |
| 2519 | |
| 2520 | /* worker to do .byte etc statements */ |
| 2521 | /* clobbers input_line_pointer, checks */ |
| 2522 | /* end-of-line. */ |
| 2523 | static void |
| 2524 | cons_worker (nbytes, rva) |
| 2525 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
| 2526 | int rva; |
| 2527 | { |
| 2528 | int c; |
| 2529 | expressionS exp; |
| 2530 | char *stop = NULL; |
| 2531 | char stopc; |
| 2532 | |
| 2533 | #ifdef md_flush_pending_output |
| 2534 | md_flush_pending_output (); |
| 2535 | #endif |
| 2536 | |
| 2537 | if (flag_mri) |
| 2538 | stop = mri_comment_field (&stopc); |
| 2539 | |
| 2540 | if (is_it_end_of_statement ()) |
| 2541 | { |
| 2542 | mri_comment_end (stop, stopc); |
| 2543 | demand_empty_rest_of_line (); |
| 2544 | return; |
| 2545 | } |
| 2546 | |
| 2547 | c = 0; |
| 2548 | do |
| 2549 | { |
| 2550 | if (rva) |
| 2551 | { |
| 2552 | /* If this is an .rva pseudoop then stick |
| 2553 | an extra reloc in for this word. */ |
| 2554 | int reloc; |
| 2555 | char *p = frag_more (0); |
| 2556 | exp.X_op = O_absent; |
| 2557 | |
| 2558 | #ifdef BFD_ASSEMBLER |
| 2559 | reloc = BFD_RELOC_RVA; |
| 2560 | #else |
| 2561 | #ifdef TC_RVA_RELOC |
| 2562 | reloc = TC_RVA_RELOC; |
| 2563 | #else |
| 2564 | abort(); |
| 2565 | #endif |
| 2566 | #endif |
| 2567 | fix_new_exp (frag_now, p - frag_now->fr_literal, |
| 2568 | nbytes, &exp, 0, reloc); |
| 2569 | |
| 2570 | } |
| 2571 | if (flag_mri) |
| 2572 | parse_mri_cons (&exp, (unsigned int) nbytes); |
| 2573 | else |
| 2574 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); |
| 2575 | emit_expr (&exp, (unsigned int) nbytes); |
| 2576 | ++c; |
| 2577 | } |
| 2578 | while (*input_line_pointer++ == ','); |
| 2579 | |
| 2580 | /* In MRI mode, after an odd number of bytes, we must align to an |
| 2581 | even word boundary, unless the next instruction is a dc.b, ds.b |
| 2582 | or dcb.b. */ |
| 2583 | if (flag_mri && nbytes == 1 && (c & 1) != 0) |
| 2584 | mri_pending_align = 1; |
| 2585 | |
| 2586 | input_line_pointer--; /* Put terminator back into stream. */ |
| 2587 | |
| 2588 | if (flag_mri) |
| 2589 | mri_comment_end (stop, stopc); |
| 2590 | |
| 2591 | demand_empty_rest_of_line (); |
| 2592 | } |
| 2593 | |
| 2594 | |
| 2595 | void |
| 2596 | cons (size) |
| 2597 | int size; |
| 2598 | { |
| 2599 | cons_worker (size, 0); |
| 2600 | } |
| 2601 | |
| 2602 | void |
| 2603 | s_rva (size) |
| 2604 | int size; |
| 2605 | { |
| 2606 | cons_worker (size, 1); |
| 2607 | } |
| 2608 | |
| 2609 | |
| 2610 | /* Put the contents of expression EXP into the object file using |
| 2611 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ |
| 2612 | |
| 2613 | void |
| 2614 | emit_expr (exp, nbytes) |
| 2615 | expressionS *exp; |
| 2616 | unsigned int nbytes; |
| 2617 | { |
| 2618 | operatorT op; |
| 2619 | register char *p; |
| 2620 | valueT extra_digit = 0; |
| 2621 | |
| 2622 | /* Don't do anything if we are going to make another pass. */ |
| 2623 | if (need_pass_2) |
| 2624 | return; |
| 2625 | |
| 2626 | op = exp->X_op; |
| 2627 | |
| 2628 | /* Allow `.word 0' in the absolute section. */ |
| 2629 | if (now_seg == absolute_section) |
| 2630 | { |
| 2631 | if (op != O_constant || exp->X_add_number != 0) |
| 2632 | as_bad ("attempt to store value in absolute section"); |
| 2633 | abs_section_offset += nbytes; |
| 2634 | return; |
| 2635 | } |
| 2636 | |
| 2637 | /* Handle a negative bignum. */ |
| 2638 | if (op == O_uminus |
| 2639 | && exp->X_add_number == 0 |
| 2640 | && exp->X_add_symbol->sy_value.X_op == O_big |
| 2641 | && exp->X_add_symbol->sy_value.X_add_number > 0) |
| 2642 | { |
| 2643 | int i; |
| 2644 | unsigned long carry; |
| 2645 | |
| 2646 | exp = &exp->X_add_symbol->sy_value; |
| 2647 | |
| 2648 | /* Negate the bignum: one's complement each digit and add 1. */ |
| 2649 | carry = 1; |
| 2650 | for (i = 0; i < exp->X_add_number; i++) |
| 2651 | { |
| 2652 | unsigned long next; |
| 2653 | |
| 2654 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) |
| 2655 | & LITTLENUM_MASK) |
| 2656 | + carry); |
| 2657 | generic_bignum[i] = next & LITTLENUM_MASK; |
| 2658 | carry = next >> LITTLENUM_NUMBER_OF_BITS; |
| 2659 | } |
| 2660 | |
| 2661 | /* We can ignore any carry out, because it will be handled by |
| 2662 | extra_digit if it is needed. */ |
| 2663 | |
| 2664 | extra_digit = (valueT) -1; |
| 2665 | op = O_big; |
| 2666 | } |
| 2667 | |
| 2668 | if (op == O_absent || op == O_illegal) |
| 2669 | { |
| 2670 | as_warn ("zero assumed for missing expression"); |
| 2671 | exp->X_add_number = 0; |
| 2672 | op = O_constant; |
| 2673 | } |
| 2674 | else if (op == O_big && exp->X_add_number <= 0) |
| 2675 | { |
| 2676 | as_bad ("floating point number invalid; zero assumed"); |
| 2677 | exp->X_add_number = 0; |
| 2678 | op = O_constant; |
| 2679 | } |
| 2680 | else if (op == O_register) |
| 2681 | { |
| 2682 | as_warn ("register value used as expression"); |
| 2683 | op = O_constant; |
| 2684 | } |
| 2685 | |
| 2686 | p = frag_more ((int) nbytes); |
| 2687 | |
| 2688 | #ifndef WORKING_DOT_WORD |
| 2689 | /* If we have the difference of two symbols in a word, save it on |
| 2690 | the broken_words list. See the code in write.c. */ |
| 2691 | if (op == O_subtract && nbytes == 2) |
| 2692 | { |
| 2693 | struct broken_word *x; |
| 2694 | |
| 2695 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); |
| 2696 | x->next_broken_word = broken_words; |
| 2697 | broken_words = x; |
| 2698 | x->frag = frag_now; |
| 2699 | x->word_goes_here = p; |
| 2700 | x->dispfrag = 0; |
| 2701 | x->add = exp->X_add_symbol; |
| 2702 | x->sub = exp->X_op_symbol; |
| 2703 | x->addnum = exp->X_add_number; |
| 2704 | x->added = 0; |
| 2705 | new_broken_words++; |
| 2706 | return; |
| 2707 | } |
| 2708 | #endif |
| 2709 | |
| 2710 | /* If we have an integer, but the number of bytes is too large to |
| 2711 | pass to md_number_to_chars, handle it as a bignum. */ |
| 2712 | if (op == O_constant && nbytes > sizeof (valueT)) |
| 2713 | { |
| 2714 | valueT val; |
| 2715 | int gencnt; |
| 2716 | |
| 2717 | if (! exp->X_unsigned && exp->X_add_number < 0) |
| 2718 | extra_digit = (valueT) -1; |
| 2719 | val = (valueT) exp->X_add_number; |
| 2720 | gencnt = 0; |
| 2721 | do |
| 2722 | { |
| 2723 | generic_bignum[gencnt] = val & LITTLENUM_MASK; |
| 2724 | val >>= LITTLENUM_NUMBER_OF_BITS; |
| 2725 | ++gencnt; |
| 2726 | } |
| 2727 | while (val != 0); |
| 2728 | op = exp->X_op = O_big; |
| 2729 | exp->X_add_number = gencnt; |
| 2730 | } |
| 2731 | |
| 2732 | if (op == O_constant) |
| 2733 | { |
| 2734 | register valueT get; |
| 2735 | register valueT use; |
| 2736 | register valueT mask; |
| 2737 | register valueT unmask; |
| 2738 | |
| 2739 | /* JF << of >= number of bits in the object is undefined. In |
| 2740 | particular SPARC (Sun 4) has problems */ |
| 2741 | if (nbytes >= sizeof (valueT)) |
| 2742 | mask = 0; |
| 2743 | else |
| 2744 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */ |
| 2745 | |
| 2746 | unmask = ~mask; /* Do store these bits. */ |
| 2747 | |
| 2748 | #ifdef NEVER |
| 2749 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; |
| 2750 | mask = ~(unmask >> 1); /* Includes sign bit now. */ |
| 2751 | #endif |
| 2752 | |
| 2753 | get = exp->X_add_number; |
| 2754 | use = get & unmask; |
| 2755 | if ((get & mask) != 0 && (get & mask) != mask) |
| 2756 | { /* Leading bits contain both 0s & 1s. */ |
| 2757 | as_warn ("Value 0x%lx truncated to 0x%lx.", get, use); |
| 2758 | } |
| 2759 | /* put bytes in right order. */ |
| 2760 | md_number_to_chars (p, use, (int) nbytes); |
| 2761 | } |
| 2762 | else if (op == O_big) |
| 2763 | { |
| 2764 | int size; |
| 2765 | LITTLENUM_TYPE *nums; |
| 2766 | |
| 2767 | know (nbytes % CHARS_PER_LITTLENUM == 0); |
| 2768 | |
| 2769 | size = exp->X_add_number * CHARS_PER_LITTLENUM; |
| 2770 | if (nbytes < size) |
| 2771 | { |
| 2772 | as_warn ("Bignum truncated to %d bytes", nbytes); |
| 2773 | size = nbytes; |
| 2774 | } |
| 2775 | |
| 2776 | if (target_big_endian) |
| 2777 | { |
| 2778 | while (nbytes > size) |
| 2779 | { |
| 2780 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); |
| 2781 | nbytes -= CHARS_PER_LITTLENUM; |
| 2782 | p += CHARS_PER_LITTLENUM; |
| 2783 | } |
| 2784 | |
| 2785 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; |
| 2786 | while (size > 0) |
| 2787 | { |
| 2788 | --nums; |
| 2789 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); |
| 2790 | size -= CHARS_PER_LITTLENUM; |
| 2791 | p += CHARS_PER_LITTLENUM; |
| 2792 | } |
| 2793 | } |
| 2794 | else |
| 2795 | { |
| 2796 | nums = generic_bignum; |
| 2797 | while (size > 0) |
| 2798 | { |
| 2799 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); |
| 2800 | ++nums; |
| 2801 | size -= CHARS_PER_LITTLENUM; |
| 2802 | p += CHARS_PER_LITTLENUM; |
| 2803 | nbytes -= CHARS_PER_LITTLENUM; |
| 2804 | } |
| 2805 | |
| 2806 | while (nbytes > 0) |
| 2807 | { |
| 2808 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); |
| 2809 | nbytes -= CHARS_PER_LITTLENUM; |
| 2810 | p += CHARS_PER_LITTLENUM; |
| 2811 | } |
| 2812 | } |
| 2813 | } |
| 2814 | else |
| 2815 | { |
| 2816 | memset (p, 0, nbytes); |
| 2817 | |
| 2818 | /* Now we need to generate a fixS to record the symbol value. |
| 2819 | This is easy for BFD. For other targets it can be more |
| 2820 | complex. For very complex cases (currently, the HPPA and |
| 2821 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you |
| 2822 | want. For simpler cases, you can define TC_CONS_RELOC to be |
| 2823 | the name of the reloc code that should be stored in the fixS. |
| 2824 | If neither is defined, the code uses NO_RELOC if it is |
| 2825 | defined, and otherwise uses 0. */ |
| 2826 | |
| 2827 | #ifdef BFD_ASSEMBLER |
| 2828 | #ifdef TC_CONS_FIX_NEW |
| 2829 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); |
| 2830 | #else |
| 2831 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
| 2832 | /* @@ Should look at CPU word size. */ |
| 2833 | nbytes == 2 ? BFD_RELOC_16 |
| 2834 | : nbytes == 8 ? BFD_RELOC_64 |
| 2835 | : BFD_RELOC_32); |
| 2836 | #endif |
| 2837 | #else |
| 2838 | #ifdef TC_CONS_FIX_NEW |
| 2839 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); |
| 2840 | #else |
| 2841 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if |
| 2842 | it is defined, otherwise use NO_RELOC if it is defined, |
| 2843 | otherwise use 0. */ |
| 2844 | #ifndef TC_CONS_RELOC |
| 2845 | #ifdef NO_RELOC |
| 2846 | #define TC_CONS_RELOC NO_RELOC |
| 2847 | #else |
| 2848 | #define TC_CONS_RELOC 0 |
| 2849 | #endif |
| 2850 | #endif |
| 2851 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
| 2852 | TC_CONS_RELOC); |
| 2853 | #endif /* TC_CONS_FIX_NEW */ |
| 2854 | #endif /* BFD_ASSEMBLER */ |
| 2855 | } |
| 2856 | } |
| 2857 | \f |
| 2858 | #ifdef BITFIELD_CONS_EXPRESSIONS |
| 2859 | |
| 2860 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as |
| 2861 | w:x,y:z, where w and y are bitwidths and x and y are values. They |
| 2862 | then pack them all together. We do a little better in that we allow |
| 2863 | them in words, longs, etc. and we'll pack them in target byte order |
| 2864 | for you. |
| 2865 | |
| 2866 | The rules are: pack least significat bit first, if a field doesn't |
| 2867 | entirely fit, put it in the next unit. Overflowing the bitfield is |
| 2868 | explicitly *not* even a warning. The bitwidth should be considered |
| 2869 | a "mask". |
| 2870 | |
| 2871 | To use this function the tc-XXX.h file should define |
| 2872 | BITFIELD_CONS_EXPRESSIONS. */ |
| 2873 | |
| 2874 | static void |
| 2875 | parse_bitfield_cons (exp, nbytes) |
| 2876 | expressionS *exp; |
| 2877 | unsigned int nbytes; |
| 2878 | { |
| 2879 | unsigned int bits_available = BITS_PER_CHAR * nbytes; |
| 2880 | char *hold = input_line_pointer; |
| 2881 | |
| 2882 | (void) expression (exp); |
| 2883 | |
| 2884 | if (*input_line_pointer == ':') |
| 2885 | { /* bitfields */ |
| 2886 | long value = 0; |
| 2887 | |
| 2888 | for (;;) |
| 2889 | { |
| 2890 | unsigned long width; |
| 2891 | |
| 2892 | if (*input_line_pointer != ':') |
| 2893 | { |
| 2894 | input_line_pointer = hold; |
| 2895 | break; |
| 2896 | } /* next piece is not a bitfield */ |
| 2897 | |
| 2898 | /* In the general case, we can't allow |
| 2899 | full expressions with symbol |
| 2900 | differences and such. The relocation |
| 2901 | entries for symbols not defined in this |
| 2902 | assembly would require arbitrary field |
| 2903 | widths, positions, and masks which most |
| 2904 | of our current object formats don't |
| 2905 | support. |
| 2906 | |
| 2907 | In the specific case where a symbol |
| 2908 | *is* defined in this assembly, we |
| 2909 | *could* build fixups and track it, but |
| 2910 | this could lead to confusion for the |
| 2911 | backends. I'm lazy. I'll take any |
| 2912 | SEG_ABSOLUTE. I think that means that |
| 2913 | you can use a previous .set or |
| 2914 | .equ type symbol. xoxorich. */ |
| 2915 | |
| 2916 | if (exp->X_op == O_absent) |
| 2917 | { |
| 2918 | as_warn ("using a bit field width of zero"); |
| 2919 | exp->X_add_number = 0; |
| 2920 | exp->X_op = O_constant; |
| 2921 | } /* implied zero width bitfield */ |
| 2922 | |
| 2923 | if (exp->X_op != O_constant) |
| 2924 | { |
| 2925 | *input_line_pointer = '\0'; |
| 2926 | as_bad ("field width \"%s\" too complex for a bitfield", hold); |
| 2927 | *input_line_pointer = ':'; |
| 2928 | demand_empty_rest_of_line (); |
| 2929 | return; |
| 2930 | } /* too complex */ |
| 2931 | |
| 2932 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) |
| 2933 | { |
| 2934 | as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits", |
| 2935 | width, nbytes, (BITS_PER_CHAR * nbytes)); |
| 2936 | width = BITS_PER_CHAR * nbytes; |
| 2937 | } /* too big */ |
| 2938 | |
| 2939 | if (width > bits_available) |
| 2940 | { |
| 2941 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ |
| 2942 | input_line_pointer = hold; |
| 2943 | exp->X_add_number = value; |
| 2944 | break; |
| 2945 | } /* won't fit */ |
| 2946 | |
| 2947 | hold = ++input_line_pointer; /* skip ':' */ |
| 2948 | |
| 2949 | (void) expression (exp); |
| 2950 | if (exp->X_op != O_constant) |
| 2951 | { |
| 2952 | char cache = *input_line_pointer; |
| 2953 | |
| 2954 | *input_line_pointer = '\0'; |
| 2955 | as_bad ("field value \"%s\" too complex for a bitfield", hold); |
| 2956 | *input_line_pointer = cache; |
| 2957 | demand_empty_rest_of_line (); |
| 2958 | return; |
| 2959 | } /* too complex */ |
| 2960 | |
| 2961 | value |= ((~(-1 << width) & exp->X_add_number) |
| 2962 | << ((BITS_PER_CHAR * nbytes) - bits_available)); |
| 2963 | |
| 2964 | if ((bits_available -= width) == 0 |
| 2965 | || is_it_end_of_statement () |
| 2966 | || *input_line_pointer != ',') |
| 2967 | { |
| 2968 | break; |
| 2969 | } /* all the bitfields we're gonna get */ |
| 2970 | |
| 2971 | hold = ++input_line_pointer; |
| 2972 | (void) expression (exp); |
| 2973 | } /* forever loop */ |
| 2974 | |
| 2975 | exp->X_add_number = value; |
| 2976 | exp->X_op = O_constant; |
| 2977 | exp->X_unsigned = 1; |
| 2978 | } /* if looks like a bitfield */ |
| 2979 | } /* parse_bitfield_cons() */ |
| 2980 | |
| 2981 | #endif /* BITFIELD_CONS_EXPRESSIONS */ |
| 2982 | \f |
| 2983 | /* Handle an MRI style string expression. */ |
| 2984 | |
| 2985 | static void |
| 2986 | parse_mri_cons (exp, nbytes) |
| 2987 | expressionS *exp; |
| 2988 | unsigned int nbytes; |
| 2989 | { |
| 2990 | if (*input_line_pointer != '\'' |
| 2991 | && (input_line_pointer[1] != '\'' |
| 2992 | || (*input_line_pointer != 'A' |
| 2993 | && *input_line_pointer != 'E'))) |
| 2994 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); |
| 2995 | else |
| 2996 | { |
| 2997 | int scan = 0; |
| 2998 | unsigned int result = 0; |
| 2999 | |
| 3000 | /* An MRI style string. Cut into as many bytes as will fit into |
| 3001 | a nbyte chunk, left justify if necessary, and separate with |
| 3002 | commas so we can try again later. */ |
| 3003 | if (*input_line_pointer == 'A') |
| 3004 | ++input_line_pointer; |
| 3005 | else if (*input_line_pointer == 'E') |
| 3006 | { |
| 3007 | as_bad ("EBCDIC constants are not supported"); |
| 3008 | ++input_line_pointer; |
| 3009 | } |
| 3010 | |
| 3011 | input_line_pointer++; |
| 3012 | for (scan = 0; scan < nbytes; scan++) |
| 3013 | { |
| 3014 | if (*input_line_pointer == '\'') |
| 3015 | { |
| 3016 | if (input_line_pointer[1] == '\'') |
| 3017 | { |
| 3018 | input_line_pointer++; |
| 3019 | } |
| 3020 | else |
| 3021 | break; |
| 3022 | } |
| 3023 | result = (result << 8) | (*input_line_pointer++); |
| 3024 | } |
| 3025 | |
| 3026 | /* Left justify */ |
| 3027 | while (scan < nbytes) |
| 3028 | { |
| 3029 | result <<= 8; |
| 3030 | scan++; |
| 3031 | } |
| 3032 | /* Create correct expression */ |
| 3033 | exp->X_op = O_constant; |
| 3034 | exp->X_add_number = result; |
| 3035 | /* Fake it so that we can read the next char too */ |
| 3036 | if (input_line_pointer[0] != '\'' || |
| 3037 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) |
| 3038 | { |
| 3039 | input_line_pointer -= 2; |
| 3040 | input_line_pointer[0] = ','; |
| 3041 | input_line_pointer[1] = '\''; |
| 3042 | } |
| 3043 | else |
| 3044 | input_line_pointer++; |
| 3045 | } |
| 3046 | } |
| 3047 | \f |
| 3048 | #ifdef REPEAT_CONS_EXPRESSIONS |
| 3049 | |
| 3050 | /* Parse a repeat expression for cons. This is used by the MIPS |
| 3051 | assembler. The format is NUMBER:COUNT; NUMBER appears in the |
| 3052 | object file COUNT times. |
| 3053 | |
| 3054 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ |
| 3055 | |
| 3056 | static void |
| 3057 | parse_repeat_cons (exp, nbytes) |
| 3058 | expressionS *exp; |
| 3059 | unsigned int nbytes; |
| 3060 | { |
| 3061 | expressionS count; |
| 3062 | register int i; |
| 3063 | |
| 3064 | expression (exp); |
| 3065 | |
| 3066 | if (*input_line_pointer != ':') |
| 3067 | { |
| 3068 | /* No repeat count. */ |
| 3069 | return; |
| 3070 | } |
| 3071 | |
| 3072 | ++input_line_pointer; |
| 3073 | expression (&count); |
| 3074 | if (count.X_op != O_constant |
| 3075 | || count.X_add_number <= 0) |
| 3076 | { |
| 3077 | as_warn ("Unresolvable or nonpositive repeat count; using 1"); |
| 3078 | return; |
| 3079 | } |
| 3080 | |
| 3081 | /* The cons function is going to output this expression once. So we |
| 3082 | output it count - 1 times. */ |
| 3083 | for (i = count.X_add_number - 1; i > 0; i--) |
| 3084 | emit_expr (exp, nbytes); |
| 3085 | } |
| 3086 | |
| 3087 | #endif /* REPEAT_CONS_EXPRESSIONS */ |
| 3088 | \f |
| 3089 | /* Parse a floating point number represented as a hex constant. This |
| 3090 | permits users to specify the exact bits they want in the floating |
| 3091 | point number. */ |
| 3092 | |
| 3093 | static int |
| 3094 | hex_float (float_type, bytes) |
| 3095 | int float_type; |
| 3096 | char *bytes; |
| 3097 | { |
| 3098 | int length; |
| 3099 | int i; |
| 3100 | |
| 3101 | switch (float_type) |
| 3102 | { |
| 3103 | case 'f': |
| 3104 | case 'F': |
| 3105 | case 's': |
| 3106 | case 'S': |
| 3107 | length = 4; |
| 3108 | break; |
| 3109 | |
| 3110 | case 'd': |
| 3111 | case 'D': |
| 3112 | case 'r': |
| 3113 | case 'R': |
| 3114 | length = 8; |
| 3115 | break; |
| 3116 | |
| 3117 | case 'x': |
| 3118 | case 'X': |
| 3119 | length = 12; |
| 3120 | break; |
| 3121 | |
| 3122 | case 'p': |
| 3123 | case 'P': |
| 3124 | length = 12; |
| 3125 | break; |
| 3126 | |
| 3127 | default: |
| 3128 | as_bad ("Unknown floating type type '%c'", float_type); |
| 3129 | return -1; |
| 3130 | } |
| 3131 | |
| 3132 | /* It would be nice if we could go through expression to parse the |
| 3133 | hex constant, but if we get a bignum it's a pain to sort it into |
| 3134 | the buffer correctly. */ |
| 3135 | i = 0; |
| 3136 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') |
| 3137 | { |
| 3138 | int d; |
| 3139 | |
| 3140 | /* The MRI assembler accepts arbitrary underscores strewn about |
| 3141 | through the hex constant, so we ignore them as well. */ |
| 3142 | if (*input_line_pointer == '_') |
| 3143 | { |
| 3144 | ++input_line_pointer; |
| 3145 | continue; |
| 3146 | } |
| 3147 | |
| 3148 | if (i >= length) |
| 3149 | { |
| 3150 | as_warn ("Floating point constant too large"); |
| 3151 | return -1; |
| 3152 | } |
| 3153 | d = hex_value (*input_line_pointer) << 4; |
| 3154 | ++input_line_pointer; |
| 3155 | while (*input_line_pointer == '_') |
| 3156 | ++input_line_pointer; |
| 3157 | if (hex_p (*input_line_pointer)) |
| 3158 | { |
| 3159 | d += hex_value (*input_line_pointer); |
| 3160 | ++input_line_pointer; |
| 3161 | } |
| 3162 | if (target_big_endian) |
| 3163 | bytes[i] = d; |
| 3164 | else |
| 3165 | bytes[length - i - 1] = d; |
| 3166 | ++i; |
| 3167 | } |
| 3168 | |
| 3169 | if (i < length) |
| 3170 | { |
| 3171 | if (target_big_endian) |
| 3172 | memset (bytes + i, 0, length - i); |
| 3173 | else |
| 3174 | memset (bytes, 0, length - i); |
| 3175 | } |
| 3176 | |
| 3177 | return length; |
| 3178 | } |
| 3179 | |
| 3180 | /* |
| 3181 | * float_cons() |
| 3182 | * |
| 3183 | * CONStruct some more frag chars of .floats .ffloats etc. |
| 3184 | * Makes 0 or more new frags. |
| 3185 | * If need_pass_2 == 1, no frags are emitted. |
| 3186 | * This understands only floating literals, not expressions. Sorry. |
| 3187 | * |
| 3188 | * A floating constant is defined by atof_generic(), except it is preceded |
| 3189 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its |
| 3190 | * reading, I decided to be incompatible. This always tries to give you |
| 3191 | * rounded bits to the precision of the pseudo-op. Former AS did premature |
| 3192 | * truncatation, restored noisy bits instead of trailing 0s AND gave you |
| 3193 | * a choice of 2 flavours of noise according to which of 2 floating-point |
| 3194 | * scanners you directed AS to use. |
| 3195 | * |
| 3196 | * In: input_line_pointer->whitespace before, or '0' of flonum. |
| 3197 | * |
| 3198 | */ |
| 3199 | |
| 3200 | void |
| 3201 | float_cons (float_type) |
| 3202 | /* Clobbers input_line-pointer, checks end-of-line. */ |
| 3203 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ |
| 3204 | { |
| 3205 | register char *p; |
| 3206 | int length; /* Number of chars in an object. */ |
| 3207 | register char *err; /* Error from scanning floating literal. */ |
| 3208 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; |
| 3209 | |
| 3210 | if (is_it_end_of_statement ()) |
| 3211 | { |
| 3212 | demand_empty_rest_of_line (); |
| 3213 | return; |
| 3214 | } |
| 3215 | |
| 3216 | do |
| 3217 | { |
| 3218 | /* input_line_pointer->1st char of a flonum (we hope!). */ |
| 3219 | SKIP_WHITESPACE (); |
| 3220 | |
| 3221 | /* Skip any 0{letter} that may be present. Don't even check if the |
| 3222 | * letter is legal. Someone may invent a "z" format and this routine |
| 3223 | * has no use for such information. Lusers beware: you get |
| 3224 | * diagnostics if your input is ill-conditioned. |
| 3225 | */ |
| 3226 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) |
| 3227 | input_line_pointer += 2; |
| 3228 | |
| 3229 | /* Accept :xxxx, where the x's are hex digits, for a floating |
| 3230 | point with the exact digits specified. */ |
| 3231 | if (input_line_pointer[0] == ':') |
| 3232 | { |
| 3233 | ++input_line_pointer; |
| 3234 | length = hex_float (float_type, temp); |
| 3235 | if (length < 0) |
| 3236 | { |
| 3237 | ignore_rest_of_line (); |
| 3238 | return; |
| 3239 | } |
| 3240 | } |
| 3241 | else |
| 3242 | { |
| 3243 | err = md_atof (float_type, temp, &length); |
| 3244 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); |
| 3245 | know (length > 0); |
| 3246 | if (err) |
| 3247 | { |
| 3248 | as_bad ("Bad floating literal: %s", err); |
| 3249 | ignore_rest_of_line (); |
| 3250 | return; |
| 3251 | } |
| 3252 | } |
| 3253 | |
| 3254 | if (!need_pass_2) |
| 3255 | { |
| 3256 | int count; |
| 3257 | |
| 3258 | count = 1; |
| 3259 | |
| 3260 | #ifdef REPEAT_CONS_EXPRESSIONS |
| 3261 | if (*input_line_pointer == ':') |
| 3262 | { |
| 3263 | expressionS count_exp; |
| 3264 | |
| 3265 | ++input_line_pointer; |
| 3266 | expression (&count_exp); |
| 3267 | if (count_exp.X_op != O_constant |
| 3268 | || count_exp.X_add_number <= 0) |
| 3269 | { |
| 3270 | as_warn ("unresolvable or nonpositive repeat count; using 1"); |
| 3271 | } |
| 3272 | else |
| 3273 | count = count_exp.X_add_number; |
| 3274 | } |
| 3275 | #endif |
| 3276 | |
| 3277 | while (--count >= 0) |
| 3278 | { |
| 3279 | p = frag_more (length); |
| 3280 | memcpy (p, temp, (unsigned int) length); |
| 3281 | } |
| 3282 | } |
| 3283 | SKIP_WHITESPACE (); |
| 3284 | } |
| 3285 | while (*input_line_pointer++ == ','); |
| 3286 | |
| 3287 | --input_line_pointer; /* Put terminator back into stream. */ |
| 3288 | demand_empty_rest_of_line (); |
| 3289 | } /* float_cons() */ |
| 3290 | \f |
| 3291 | /* |
| 3292 | * stringer() |
| 3293 | * |
| 3294 | * We read 0 or more ',' seperated, double-quoted strings. |
| 3295 | * |
| 3296 | * Caller should have checked need_pass_2 is FALSE because we don't check it. |
| 3297 | */ |
| 3298 | |
| 3299 | |
| 3300 | void |
| 3301 | stringer (append_zero) /* Worker to do .ascii etc statements. */ |
| 3302 | /* Checks end-of-line. */ |
| 3303 | register int append_zero; /* 0: don't append '\0', else 1 */ |
| 3304 | { |
| 3305 | register unsigned int c; |
| 3306 | |
| 3307 | #ifdef md_flush_pending_output |
| 3308 | md_flush_pending_output (); |
| 3309 | #endif |
| 3310 | |
| 3311 | /* |
| 3312 | * The following awkward logic is to parse ZERO or more strings, |
| 3313 | * comma seperated. Recall a string expression includes spaces |
| 3314 | * before the opening '\"' and spaces after the closing '\"'. |
| 3315 | * We fake a leading ',' if there is (supposed to be) |
| 3316 | * a 1st, expression. We keep demanding expressions for each |
| 3317 | * ','. |
| 3318 | */ |
| 3319 | if (is_it_end_of_statement ()) |
| 3320 | { |
| 3321 | c = 0; /* Skip loop. */ |
| 3322 | ++input_line_pointer; /* Compensate for end of loop. */ |
| 3323 | } |
| 3324 | else |
| 3325 | { |
| 3326 | c = ','; /* Do loop. */ |
| 3327 | } |
| 3328 | while (c == ',' || c == '<' || c == '"') |
| 3329 | { |
| 3330 | SKIP_WHITESPACE (); |
| 3331 | switch (*input_line_pointer) |
| 3332 | { |
| 3333 | case '\"': |
| 3334 | ++input_line_pointer; /*->1st char of string. */ |
| 3335 | while (is_a_char (c = next_char_of_string ())) |
| 3336 | { |
| 3337 | FRAG_APPEND_1_CHAR (c); |
| 3338 | } |
| 3339 | if (append_zero) |
| 3340 | { |
| 3341 | FRAG_APPEND_1_CHAR (0); |
| 3342 | } |
| 3343 | know (input_line_pointer[-1] == '\"'); |
| 3344 | break; |
| 3345 | case '<': |
| 3346 | input_line_pointer++; |
| 3347 | c = get_single_number (); |
| 3348 | FRAG_APPEND_1_CHAR (c); |
| 3349 | if (*input_line_pointer != '>') |
| 3350 | { |
| 3351 | as_bad ("Expected <nn>"); |
| 3352 | } |
| 3353 | input_line_pointer++; |
| 3354 | break; |
| 3355 | case ',': |
| 3356 | input_line_pointer++; |
| 3357 | break; |
| 3358 | } |
| 3359 | SKIP_WHITESPACE (); |
| 3360 | c = *input_line_pointer; |
| 3361 | } |
| 3362 | |
| 3363 | demand_empty_rest_of_line (); |
| 3364 | } /* stringer() */ |
| 3365 | \f |
| 3366 | /* FIXME-SOMEDAY: I had trouble here on characters with the |
| 3367 | high bits set. We'll probably also have trouble with |
| 3368 | multibyte chars, wide chars, etc. Also be careful about |
| 3369 | returning values bigger than 1 byte. xoxorich. */ |
| 3370 | |
| 3371 | unsigned int |
| 3372 | next_char_of_string () |
| 3373 | { |
| 3374 | register unsigned int c; |
| 3375 | |
| 3376 | c = *input_line_pointer++ & CHAR_MASK; |
| 3377 | switch (c) |
| 3378 | { |
| 3379 | case '\"': |
| 3380 | c = NOT_A_CHAR; |
| 3381 | break; |
| 3382 | |
| 3383 | #ifndef NO_STRING_ESCAPES |
| 3384 | case '\\': |
| 3385 | switch (c = *input_line_pointer++) |
| 3386 | { |
| 3387 | case 'b': |
| 3388 | c = '\b'; |
| 3389 | break; |
| 3390 | |
| 3391 | case 'f': |
| 3392 | c = '\f'; |
| 3393 | break; |
| 3394 | |
| 3395 | case 'n': |
| 3396 | c = '\n'; |
| 3397 | break; |
| 3398 | |
| 3399 | case 'r': |
| 3400 | c = '\r'; |
| 3401 | break; |
| 3402 | |
| 3403 | case 't': |
| 3404 | c = '\t'; |
| 3405 | break; |
| 3406 | |
| 3407 | case 'v': |
| 3408 | c = '\013'; |
| 3409 | break; |
| 3410 | |
| 3411 | case '\\': |
| 3412 | case '"': |
| 3413 | break; /* As itself. */ |
| 3414 | |
| 3415 | case '0': |
| 3416 | case '1': |
| 3417 | case '2': |
| 3418 | case '3': |
| 3419 | case '4': |
| 3420 | case '5': |
| 3421 | case '6': |
| 3422 | case '7': |
| 3423 | case '8': |
| 3424 | case '9': |
| 3425 | { |
| 3426 | long number; |
| 3427 | int i; |
| 3428 | |
| 3429 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) |
| 3430 | { |
| 3431 | number = number * 8 + c - '0'; |
| 3432 | } |
| 3433 | c = number & 0xff; |
| 3434 | } |
| 3435 | --input_line_pointer; |
| 3436 | break; |
| 3437 | |
| 3438 | case 'x': |
| 3439 | case 'X': |
| 3440 | { |
| 3441 | long number; |
| 3442 | |
| 3443 | number = 0; |
| 3444 | c = *input_line_pointer++; |
| 3445 | while (isxdigit (c)) |
| 3446 | { |
| 3447 | if (isdigit (c)) |
| 3448 | number = number * 16 + c - '0'; |
| 3449 | else if (isupper (c)) |
| 3450 | number = number * 16 + c - 'A' + 10; |
| 3451 | else |
| 3452 | number = number * 16 + c - 'a' + 10; |
| 3453 | c = *input_line_pointer++; |
| 3454 | } |
| 3455 | c = number & 0xff; |
| 3456 | --input_line_pointer; |
| 3457 | } |
| 3458 | break; |
| 3459 | |
| 3460 | case '\n': |
| 3461 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ |
| 3462 | as_warn ("Unterminated string: Newline inserted."); |
| 3463 | c = '\n'; |
| 3464 | break; |
| 3465 | |
| 3466 | default: |
| 3467 | |
| 3468 | #ifdef ONLY_STANDARD_ESCAPES |
| 3469 | as_bad ("Bad escaped character in string, '?' assumed"); |
| 3470 | c = '?'; |
| 3471 | #endif /* ONLY_STANDARD_ESCAPES */ |
| 3472 | |
| 3473 | break; |
| 3474 | } /* switch on escaped char */ |
| 3475 | break; |
| 3476 | #endif /* ! defined (NO_STRING_ESCAPES) */ |
| 3477 | |
| 3478 | default: |
| 3479 | break; |
| 3480 | } /* switch on char */ |
| 3481 | return (c); |
| 3482 | } /* next_char_of_string() */ |
| 3483 | \f |
| 3484 | static segT |
| 3485 | get_segmented_expression (expP) |
| 3486 | register expressionS *expP; |
| 3487 | { |
| 3488 | register segT retval; |
| 3489 | |
| 3490 | retval = expression (expP); |
| 3491 | if (expP->X_op == O_illegal |
| 3492 | || expP->X_op == O_absent |
| 3493 | || expP->X_op == O_big) |
| 3494 | { |
| 3495 | as_bad ("expected address expression; zero assumed"); |
| 3496 | expP->X_op = O_constant; |
| 3497 | expP->X_add_number = 0; |
| 3498 | retval = absolute_section; |
| 3499 | } |
| 3500 | return retval; |
| 3501 | } |
| 3502 | |
| 3503 | static segT |
| 3504 | get_known_segmented_expression (expP) |
| 3505 | register expressionS *expP; |
| 3506 | { |
| 3507 | register segT retval; |
| 3508 | |
| 3509 | if ((retval = get_segmented_expression (expP)) == undefined_section) |
| 3510 | { |
| 3511 | /* There is no easy way to extract the undefined symbol from the |
| 3512 | expression. */ |
| 3513 | if (expP->X_add_symbol != NULL |
| 3514 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) |
| 3515 | as_warn ("symbol \"%s\" undefined; zero assumed", |
| 3516 | S_GET_NAME (expP->X_add_symbol)); |
| 3517 | else |
| 3518 | as_warn ("some symbol undefined; zero assumed"); |
| 3519 | retval = absolute_section; |
| 3520 | expP->X_op = O_constant; |
| 3521 | expP->X_add_number = 0; |
| 3522 | } |
| 3523 | know (retval == absolute_section || SEG_NORMAL (retval)); |
| 3524 | return (retval); |
| 3525 | } /* get_known_segmented_expression() */ |
| 3526 | |
| 3527 | offsetT |
| 3528 | get_absolute_expression () |
| 3529 | { |
| 3530 | expressionS exp; |
| 3531 | |
| 3532 | expression (&exp); |
| 3533 | if (exp.X_op != O_constant) |
| 3534 | { |
| 3535 | if (exp.X_op != O_absent) |
| 3536 | as_bad ("bad or irreducible absolute expression; zero assumed"); |
| 3537 | exp.X_add_number = 0; |
| 3538 | } |
| 3539 | return exp.X_add_number; |
| 3540 | } |
| 3541 | |
| 3542 | char /* return terminator */ |
| 3543 | get_absolute_expression_and_terminator (val_pointer) |
| 3544 | long *val_pointer; /* return value of expression */ |
| 3545 | { |
| 3546 | /* FIXME: val_pointer should probably be offsetT *. */ |
| 3547 | *val_pointer = (long) get_absolute_expression (); |
| 3548 | return (*input_line_pointer++); |
| 3549 | } |
| 3550 | \f |
| 3551 | /* |
| 3552 | * demand_copy_C_string() |
| 3553 | * |
| 3554 | * Like demand_copy_string, but return NULL if the string contains any '\0's. |
| 3555 | * Give a warning if that happens. |
| 3556 | */ |
| 3557 | char * |
| 3558 | demand_copy_C_string (len_pointer) |
| 3559 | int *len_pointer; |
| 3560 | { |
| 3561 | register char *s; |
| 3562 | |
| 3563 | if ((s = demand_copy_string (len_pointer)) != 0) |
| 3564 | { |
| 3565 | register int len; |
| 3566 | |
| 3567 | for (len = *len_pointer; |
| 3568 | len > 0; |
| 3569 | len--) |
| 3570 | { |
| 3571 | if (*s == 0) |
| 3572 | { |
| 3573 | s = 0; |
| 3574 | len = 1; |
| 3575 | *len_pointer = 0; |
| 3576 | as_bad ("This string may not contain \'\\0\'"); |
| 3577 | } |
| 3578 | } |
| 3579 | } |
| 3580 | return (s); |
| 3581 | } |
| 3582 | \f |
| 3583 | /* |
| 3584 | * demand_copy_string() |
| 3585 | * |
| 3586 | * Demand string, but return a safe (=private) copy of the string. |
| 3587 | * Return NULL if we can't read a string here. |
| 3588 | */ |
| 3589 | char * |
| 3590 | demand_copy_string (lenP) |
| 3591 | int *lenP; |
| 3592 | { |
| 3593 | register unsigned int c; |
| 3594 | register int len; |
| 3595 | char *retval; |
| 3596 | |
| 3597 | len = 0; |
| 3598 | SKIP_WHITESPACE (); |
| 3599 | if (*input_line_pointer == '\"') |
| 3600 | { |
| 3601 | input_line_pointer++; /* Skip opening quote. */ |
| 3602 | |
| 3603 | while (is_a_char (c = next_char_of_string ())) |
| 3604 | { |
| 3605 | obstack_1grow (¬es, c); |
| 3606 | len++; |
| 3607 | } |
| 3608 | /* JF this next line is so demand_copy_C_string will return a null |
| 3609 | termanated string. */ |
| 3610 | obstack_1grow (¬es, '\0'); |
| 3611 | retval = obstack_finish (¬es); |
| 3612 | } |
| 3613 | else |
| 3614 | { |
| 3615 | as_warn ("Missing string"); |
| 3616 | retval = NULL; |
| 3617 | ignore_rest_of_line (); |
| 3618 | } |
| 3619 | *lenP = len; |
| 3620 | return (retval); |
| 3621 | } /* demand_copy_string() */ |
| 3622 | \f |
| 3623 | /* |
| 3624 | * is_it_end_of_statement() |
| 3625 | * |
| 3626 | * In: Input_line_pointer->next character. |
| 3627 | * |
| 3628 | * Do: Skip input_line_pointer over all whitespace. |
| 3629 | * |
| 3630 | * Out: 1 if input_line_pointer->end-of-line. |
| 3631 | */ |
| 3632 | int |
| 3633 | is_it_end_of_statement () |
| 3634 | { |
| 3635 | SKIP_WHITESPACE (); |
| 3636 | return (is_end_of_line[(unsigned char) *input_line_pointer]); |
| 3637 | } /* is_it_end_of_statement() */ |
| 3638 | |
| 3639 | void |
| 3640 | equals (sym_name) |
| 3641 | char *sym_name; |
| 3642 | { |
| 3643 | register symbolS *symbolP; /* symbol we are working with */ |
| 3644 | char *stop; |
| 3645 | char stopc; |
| 3646 | |
| 3647 | input_line_pointer++; |
| 3648 | if (*input_line_pointer == '=') |
| 3649 | input_line_pointer++; |
| 3650 | |
| 3651 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') |
| 3652 | input_line_pointer++; |
| 3653 | |
| 3654 | if (flag_mri) |
| 3655 | stop = mri_comment_field (&stopc); |
| 3656 | |
| 3657 | if (sym_name[0] == '.' && sym_name[1] == '\0') |
| 3658 | { |
| 3659 | /* Turn '. = mumble' into a .org mumble */ |
| 3660 | register segT segment; |
| 3661 | expressionS exp; |
| 3662 | |
| 3663 | segment = get_known_segmented_expression (&exp); |
| 3664 | if (!need_pass_2) |
| 3665 | do_org (segment, &exp, 0); |
| 3666 | } |
| 3667 | else |
| 3668 | { |
| 3669 | symbolP = symbol_find_or_make (sym_name); |
| 3670 | pseudo_set (symbolP); |
| 3671 | } |
| 3672 | |
| 3673 | if (flag_mri) |
| 3674 | mri_comment_end (stop, stopc); |
| 3675 | } /* equals() */ |
| 3676 | |
| 3677 | /* .include -- include a file at this point. */ |
| 3678 | |
| 3679 | /* ARGSUSED */ |
| 3680 | void |
| 3681 | s_include (arg) |
| 3682 | int arg; |
| 3683 | { |
| 3684 | char *newbuf; |
| 3685 | char *filename; |
| 3686 | int i; |
| 3687 | FILE *try; |
| 3688 | char *path; |
| 3689 | |
| 3690 | if (! flag_mri) |
| 3691 | filename = demand_copy_string (&i); |
| 3692 | else |
| 3693 | { |
| 3694 | SKIP_WHITESPACE (); |
| 3695 | i = 0; |
| 3696 | while (! is_end_of_line[(unsigned char) *input_line_pointer] |
| 3697 | && *input_line_pointer != ' ' |
| 3698 | && *input_line_pointer != '\t') |
| 3699 | { |
| 3700 | obstack_1grow (¬es, *input_line_pointer); |
| 3701 | ++input_line_pointer; |
| 3702 | ++i; |
| 3703 | } |
| 3704 | obstack_1grow (¬es, '\0'); |
| 3705 | filename = obstack_finish (¬es); |
| 3706 | } |
| 3707 | demand_empty_rest_of_line (); |
| 3708 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); |
| 3709 | for (i = 0; i < include_dir_count; i++) |
| 3710 | { |
| 3711 | strcpy (path, include_dirs[i]); |
| 3712 | strcat (path, "/"); |
| 3713 | strcat (path, filename); |
| 3714 | if (0 != (try = fopen (path, "r"))) |
| 3715 | { |
| 3716 | fclose (try); |
| 3717 | goto gotit; |
| 3718 | } |
| 3719 | } |
| 3720 | free (path); |
| 3721 | path = filename; |
| 3722 | gotit: |
| 3723 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ |
| 3724 | newbuf = input_scrub_include_file (path, input_line_pointer); |
| 3725 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); |
| 3726 | } /* s_include() */ |
| 3727 | |
| 3728 | void |
| 3729 | add_include_dir (path) |
| 3730 | char *path; |
| 3731 | { |
| 3732 | int i; |
| 3733 | |
| 3734 | if (include_dir_count == 0) |
| 3735 | { |
| 3736 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); |
| 3737 | include_dirs[0] = "."; /* Current dir */ |
| 3738 | include_dir_count = 2; |
| 3739 | } |
| 3740 | else |
| 3741 | { |
| 3742 | include_dir_count++; |
| 3743 | include_dirs = (char **) realloc (include_dirs, |
| 3744 | include_dir_count * sizeof (*include_dirs)); |
| 3745 | } |
| 3746 | |
| 3747 | include_dirs[include_dir_count - 1] = path; /* New one */ |
| 3748 | |
| 3749 | i = strlen (path); |
| 3750 | if (i > include_dir_maxlen) |
| 3751 | include_dir_maxlen = i; |
| 3752 | } /* add_include_dir() */ |
| 3753 | |
| 3754 | void |
| 3755 | s_ignore (arg) |
| 3756 | int arg; |
| 3757 | { |
| 3758 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
| 3759 | { |
| 3760 | ++input_line_pointer; |
| 3761 | } |
| 3762 | ++input_line_pointer; |
| 3763 | } |
| 3764 | |
| 3765 | |
| 3766 | /* end of read.c */ |