Commit | Line | Data |
---|---|---|
fecd2382 | 1 | /* read.c - read a source file - |
5ac34ac3 | 2 | Copyright (C) 1986, 1987, 1990, 1991, 1993 Free Software Foundation, Inc. |
3340f7e5 | 3 | |
f8701a3f SC |
4 | This file is part of GAS, the GNU Assembler. |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
fecd2382 | 19 | |
016e0d42 | 20 | #if 0 |
fecd2382 RP |
21 | #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will |
22 | change this a bit. But then, GNU isn't | |
23 | spozed to run on your machine anyway. | |
24 | (RMS is so shortsighted sometimes.) | |
25 | */ | |
016e0d42 ILT |
26 | #else |
27 | #define MASK_CHAR ((int)(unsigned char)-1) | |
28 | #endif | |
fecd2382 | 29 | |
9a7d824a | 30 | |
9471a360 KR |
31 | /* This is the largest known floating point format (for now). It will |
32 | grow when we do 4361 style flonums. */ | |
fecd2382 | 33 | |
9471a360 | 34 | #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) |
fecd2382 | 35 | |
016e0d42 ILT |
36 | /* Routines that read assembler source text to build spagetti in memory. |
37 | Another group of these functions is in the expr.c module. */ | |
fecd2382 | 38 | |
9471a360 | 39 | /* for isdigit() */ |
6efd877d KR |
40 | #include <ctype.h> |
41 | ||
fecd2382 | 42 | #include "as.h" |
9471a360 | 43 | #include "subsegs.h" |
fecd2382 RP |
44 | |
45 | #include "obstack.h" | |
9a7d824a ILT |
46 | #include "listing.h" |
47 | ||
4064305e SS |
48 | /* We need this, despite the apparent object format dependency, since |
49 | it defines stab types, which all object formats can use now. */ | |
50 | ||
51 | #include "aout/stab_gnu.h" | |
9a7d824a ILT |
52 | |
53 | #ifndef TC_START_LABEL | |
54 | #define TC_START_LABEL(x,y) (x==':') | |
55 | #endif | |
fecd2382 | 56 | |
016e0d42 ILT |
57 | /* The NOP_OPCODE is for the alignment fill value. |
58 | * fill it a nop instruction so that the disassembler does not choke | |
59 | * on it | |
60 | */ | |
61 | #ifndef NOP_OPCODE | |
62 | #define NOP_OPCODE 0x00 | |
63 | #endif | |
64 | ||
65 | char *input_line_pointer; /*->next char of source file to parse. */ | |
fecd2382 RP |
66 | |
67 | #if BITS_PER_CHAR != 8 | |
6efd877d KR |
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; | |
fecd2382 | 71 | #endif |
f8701a3f | 72 | |
c978e704 ILT |
73 | #ifndef LEX_AT |
74 | /* The m88k unfortunately uses @ as a label beginner. */ | |
75 | #define LEX_AT 0 | |
76 | #endif | |
77 | ||
016e0d42 ILT |
78 | /* used by is_... macros. our ctype[] */ |
79 | const char lex_type[256] = | |
80 | { | |
81 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
82 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
83 | 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ | |
84 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */ | |
c978e704 | 85 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ |
016e0d42 ILT |
86 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 3, /* PQRSTUVWXYZ[\]^_ */ |
87 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ | |
88 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 0, 0, 0, 0, /* pqrstuvwxyz{|}~. */ | |
89 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
90 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
91 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
92 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
93 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
94 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
95 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
96 | }; | |
97 | ||
98 | ||
99 | /* | |
fecd2382 RP |
100 | * In: a character. |
101 | * Out: 1 if this character ends a line. | |
102 | */ | |
103 | #define _ (0) | |
016e0d42 ILT |
104 | char is_end_of_line[256] = |
105 | { | |
fecd2382 | 106 | #ifdef CR_EOL |
016e0d42 | 107 | _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */ |
fecd2382 | 108 | #else |
016e0d42 | 109 | _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */ |
fecd2382 | 110 | #endif |
016e0d42 | 111 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
40324362 KR |
112 | #ifdef TC_HPPA |
113 | _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */ | |
114 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */ | |
115 | #else | |
016e0d42 ILT |
116 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
117 | _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */ | |
40324362 | 118 | #endif |
016e0d42 ILT |
119 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
120 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
121 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
122 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
123 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
124 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
125 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
126 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
127 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
128 | }; | |
fecd2382 RP |
129 | #undef _ |
130 | ||
016e0d42 ILT |
131 | /* Functions private to this file. */ |
132 | ||
133 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
134 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
fecd2382 | 135 | |
9c6d3f66 KR |
136 | int target_big_endian; |
137 | ||
9471a360 | 138 | static char *old_buffer; /* JF a hack */ |
016e0d42 ILT |
139 | static char *old_input; |
140 | static char *old_limit; | |
fecd2382 | 141 | |
016e0d42 | 142 | /* Variables for handling include file directory list. */ |
fecd2382 | 143 | |
016e0d42 ILT |
144 | char **include_dirs; /* List of pointers to directories to |
145 | search for .include's */ | |
146 | int include_dir_count; /* How many are in the list */ | |
147 | int include_dir_maxlen = 1;/* Length of longest in list */ | |
fecd2382 RP |
148 | |
149 | #ifndef WORKING_DOT_WORD | |
016e0d42 | 150 | struct broken_word *broken_words; |
9471a360 | 151 | int new_broken_words; |
fecd2382 RP |
152 | #endif |
153 | ||
016e0d42 ILT |
154 | static char *demand_copy_string PARAMS ((int *lenP)); |
155 | int is_it_end_of_statement PARAMS ((void)); | |
5ac34ac3 | 156 | static segT get_segmented_expression PARAMS ((expressionS *expP)); |
016e0d42 | 157 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); |
016e0d42 | 158 | static void pobegin PARAMS ((void)); |
fecd2382 | 159 | \f |
6efd877d | 160 | |
016e0d42 ILT |
161 | void |
162 | read_begin () | |
fecd2382 | 163 | { |
016e0d42 | 164 | const char *p; |
f8701a3f | 165 | |
6efd877d KR |
166 | pobegin (); |
167 | obj_read_begin_hook (); | |
f8701a3f | 168 | |
4380166d KR |
169 | /* Something close -- but not too close -- to a multiple of 1024. |
170 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
171 | obstack_begin (¬es, 5090); | |
172 | obstack_begin (&cond_obstack, 990); | |
f8701a3f | 173 | |
f8701a3f SC |
174 | /* Use machine dependent syntax */ |
175 | for (p = line_separator_chars; *p; p++) | |
58d4951d | 176 | is_end_of_line[(unsigned char) *p] = 1; |
f8701a3f | 177 | /* Use more. FIXME-SOMEDAY. */ |
fecd2382 RP |
178 | } |
179 | \f | |
180 | /* set up pseudo-op tables */ | |
181 | ||
c8863a58 | 182 | struct hash_control *po_hash; |
fecd2382 | 183 | |
016e0d42 | 184 | static const pseudo_typeS potable[] = |
fecd2382 | 185 | { |
6efd877d KR |
186 | {"abort", s_abort, 0}, |
187 | {"align", s_align_ptwo, 0}, | |
188 | {"ascii", stringer, 0}, | |
189 | {"asciz", stringer, 1}, | |
f8701a3f | 190 | /* block */ |
6efd877d KR |
191 | {"byte", cons, 1}, |
192 | {"comm", s_comm, 0}, | |
193 | {"data", s_data, 0}, | |
604633ae | 194 | #ifdef S_SET_DESC |
4064305e | 195 | {"desc", s_desc, 0}, |
604633ae | 196 | #endif |
f8701a3f | 197 | /* dim */ |
6efd877d | 198 | {"double", float_cons, 'd'}, |
f8701a3f | 199 | /* dsect */ |
6efd877d KR |
200 | {"eject", listing_eject, 0}, /* Formfeed listing */ |
201 | {"else", s_else, 0}, | |
202 | {"end", s_end, 0}, | |
203 | {"endif", s_endif, 0}, | |
f8701a3f | 204 | /* endef */ |
6efd877d | 205 | {"equ", s_set, 0}, |
f8701a3f SC |
206 | /* err */ |
207 | /* extend */ | |
6efd877d | 208 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ |
9a7d824a ILT |
209 | {"appfile", s_app_file, 1}, |
210 | {"appline", s_app_line, 0}, | |
6efd877d KR |
211 | {"file", s_app_file, 0}, |
212 | {"fill", s_fill, 0}, | |
213 | {"float", float_cons, 'f'}, | |
6efd877d KR |
214 | {"global", s_globl, 0}, |
215 | {"globl", s_globl, 0}, | |
216 | {"hword", cons, 2}, | |
217 | {"if", s_if, 0}, | |
218 | {"ifdef", s_ifdef, 0}, | |
219 | {"ifeqs", s_ifeqs, 0}, | |
220 | {"ifndef", s_ifdef, 1}, | |
221 | {"ifnes", s_ifeqs, 1}, | |
222 | {"ifnotdef", s_ifdef, 1}, | |
223 | {"include", s_include, 0}, | |
224 | {"int", cons, 4}, | |
225 | {"lcomm", s_lcomm, 0}, | |
226 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
227 | {"list", listing_list, 1}, /* Turn listing on */ | |
228 | {"long", cons, 4}, | |
229 | {"lsym", s_lsym, 0}, | |
230 | {"nolist", listing_list, 0}, /* Turn listing off */ | |
80aab579 | 231 | {"octa", cons, 16}, |
6efd877d KR |
232 | {"org", s_org, 0}, |
233 | {"psize", listing_psize, 0}, /* set paper size */ | |
f8701a3f | 234 | /* print */ |
80aab579 | 235 | {"quad", cons, 8}, |
6efd877d | 236 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ |
f8701a3f SC |
237 | /* scl */ |
238 | /* sect */ | |
6efd877d KR |
239 | {"set", s_set, 0}, |
240 | {"short", cons, 2}, | |
241 | {"single", float_cons, 'f'}, | |
f8701a3f | 242 | /* size */ |
6efd877d | 243 | {"space", s_space, 0}, |
4064305e SS |
244 | {"stabd", s_stab, 'd'}, |
245 | {"stabn", s_stab, 'n'}, | |
246 | {"stabs", s_stab, 's'}, | |
ba71c54d | 247 | {"string", stringer, 1}, |
f8701a3f | 248 | /* tag */ |
6efd877d KR |
249 | {"text", s_text, 0}, |
250 | {"title", listing_title, 0}, /* Listing title */ | |
f8701a3f SC |
251 | /* type */ |
252 | /* use */ | |
253 | /* val */ | |
4064305e | 254 | {"xstabs", s_xstab, 's'}, |
6efd877d KR |
255 | {"word", cons, 2}, |
256 | {NULL} /* end sentinel */ | |
fecd2382 RP |
257 | }; |
258 | ||
6efd877d KR |
259 | static void |
260 | pobegin () | |
261 | { | |
604633ae | 262 | const char *errtxt; /* error text */ |
6efd877d KR |
263 | const pseudo_typeS *pop; |
264 | ||
265 | po_hash = hash_new (); | |
266 | ||
267 | /* Do the target-specific pseudo ops. */ | |
268 | for (pop = md_pseudo_table; pop->poc_name; pop++) | |
269 | { | |
270 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
80aab579 | 271 | if (errtxt) |
6efd877d KR |
272 | { |
273 | as_fatal ("error constructing md pseudo-op table"); | |
274 | } /* on error */ | |
275 | } /* for each op */ | |
276 | ||
277 | /* Now object specific. Skip any that were in the target table. */ | |
278 | for (pop = obj_pseudo_table; pop->poc_name; pop++) | |
279 | { | |
280 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
80aab579 | 281 | if (errtxt) |
6efd877d KR |
282 | { |
283 | if (!strcmp (errtxt, "exists")) | |
284 | { | |
fecd2382 | 285 | #ifdef DIE_ON_OVERRIDES |
6efd877d | 286 | as_fatal ("pseudo op \".%s\" overridden.\n", pop->poc_name); |
fecd2382 | 287 | #endif /* DIE_ON_OVERRIDES */ |
6efd877d KR |
288 | continue; /* OK if target table overrides. */ |
289 | } | |
290 | else | |
291 | { | |
292 | as_fatal ("error constructing obj pseudo-op table"); | |
293 | } /* if overridden */ | |
294 | } /* on error */ | |
295 | } /* for each op */ | |
296 | ||
297 | /* Now portable ones. Skip any that we've seen already. */ | |
298 | for (pop = potable; pop->poc_name; pop++) | |
299 | { | |
300 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
80aab579 | 301 | if (errtxt) |
6efd877d KR |
302 | { |
303 | if (!strcmp (errtxt, "exists")) | |
304 | { | |
fecd2382 | 305 | #ifdef DIE_ON_OVERRIDES |
6efd877d | 306 | as_fatal ("pseudo op \".%s\" overridden.\n", pop->poc_name); |
fecd2382 | 307 | #endif /* DIE_ON_OVERRIDES */ |
6efd877d KR |
308 | continue; /* OK if target table overrides. */ |
309 | } | |
310 | else | |
311 | { | |
312 | as_fatal ("error constructing obj pseudo-op table"); | |
313 | } /* if overridden */ | |
314 | } /* on error */ | |
315 | } /* for each op */ | |
316 | ||
317 | return; | |
318 | } /* pobegin() */ | |
fecd2382 | 319 | \f |
58d4951d ILT |
320 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ |
321 | if (ignore_input ()) \ | |
322 | { \ | |
323 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
324 | if (input_line_pointer == buffer_limit) \ | |
325 | break; \ | |
326 | continue; \ | |
f8701a3f | 327 | } |
a39116f1 | 328 | |
fecd2382 RP |
329 | |
330 | /* read_a_source_file() | |
331 | * | |
332 | * We read the file, putting things into a web that | |
333 | * represents what we have been reading. | |
334 | */ | |
6efd877d KR |
335 | void |
336 | read_a_source_file (name) | |
337 | char *name; | |
fecd2382 | 338 | { |
f8701a3f | 339 | register char c; |
6efd877d | 340 | register char *s; /* string of symbol, '\0' appended */ |
f8701a3f | 341 | register int temp; |
6efd877d | 342 | pseudo_typeS *pop; |
f8701a3f | 343 | |
6efd877d | 344 | buffer = input_scrub_new_file (name); |
f8701a3f | 345 | |
6efd877d KR |
346 | listing_file (name); |
347 | listing_newline (""); | |
f8701a3f | 348 | |
6efd877d KR |
349 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) |
350 | { /* We have another line to parse. */ | |
351 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
9471a360 KR |
352 | contin: /* JF this goto is my fault I admit it. |
353 | Someone brave please re-write the whole | |
354 | input section here? Pleeze??? */ | |
6efd877d | 355 | while (input_line_pointer < buffer_limit) |
9471a360 KR |
356 | { |
357 | /* We have more of this buffer to parse. */ | |
f8701a3f SC |
358 | |
359 | /* | |
360 | * We now have input_line_pointer->1st char of next line. | |
361 | * If input_line_pointer [-1] == '\n' then we just | |
362 | * scanned another line: so bump line counters. | |
363 | */ | |
6efd877d KR |
364 | if (input_line_pointer[-1] == '\n') |
365 | { | |
366 | bump_line_counters (); | |
f8701a3f SC |
367 | |
368 | #ifdef MRI | |
369 | /* Text at the start of a line must be a label, we run down and stick a colon in */ | |
6efd877d KR |
370 | if (is_name_beginner (*input_line_pointer)) |
371 | { | |
372 | char *line_start = input_line_pointer; | |
373 | char c = get_symbol_end (); | |
374 | colon (line_start); | |
375 | *input_line_pointer = c; | |
376 | if (c == ':') | |
377 | input_line_pointer++; | |
378 | ||
379 | } | |
f8701a3f | 380 | #endif |
9471a360 | 381 | } |
f8701a3f SC |
382 | |
383 | ||
f8701a3f SC |
384 | /* |
385 | * We are at the begining of a line, or similar place. | |
386 | * We expect a well-formed assembler statement. | |
387 | * A "symbol-name:" is a statement. | |
388 | * | |
389 | * Depending on what compiler is used, the order of these tests | |
390 | * may vary to catch most common case 1st. | |
391 | * Each test is independent of all other tests at the (top) level. | |
392 | * PLEASE make a compiler that doesn't use this assembler. | |
393 | * It is crufty to waste a compiler's time encoding things for this | |
394 | * assembler, which then wastes more time decoding it. | |
395 | * (And communicating via (linear) files is silly! | |
396 | * If you must pass stuff, please pass a tree!) | |
397 | */ | |
9471a360 KR |
398 | if ((c = *input_line_pointer++) == '\t' |
399 | || c == ' ' | |
400 | || c == '\f' | |
401 | || c == 0) | |
6efd877d KR |
402 | { |
403 | c = *input_line_pointer++; | |
404 | } | |
405 | know (c != ' '); /* No further leading whitespace. */ | |
406 | LISTING_NEWLINE (); | |
f8701a3f SC |
407 | /* |
408 | * C is the 1st significant character. | |
409 | * Input_line_pointer points after that character. | |
410 | */ | |
6efd877d KR |
411 | if (is_name_beginner (c)) |
412 | { /* want user-defined label or pseudo/opcode */ | |
413 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
414 | ||
f8701a3f | 415 | s = --input_line_pointer; |
6efd877d | 416 | c = get_symbol_end (); /* name's delimiter */ |
f8701a3f SC |
417 | /* |
418 | * C is character after symbol. | |
419 | * That character's place in the input line is now '\0'. | |
420 | * S points to the beginning of the symbol. | |
421 | * [In case of pseudo-op, s->'.'.] | |
422 | * Input_line_pointer->'\0' where c was. | |
423 | */ | |
9a7d824a | 424 | if (TC_START_LABEL(c, input_line_pointer)) |
6efd877d KR |
425 | { |
426 | colon (s); /* user-defined label */ | |
427 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ | |
f8701a3f | 428 | /* Input_line_pointer->after ':'. */ |
6efd877d KR |
429 | SKIP_WHITESPACE (); |
430 | ||
f8701a3f | 431 | |
6efd877d | 432 | } |
4064305e SS |
433 | else if (c == '=' |
434 | || (input_line_pointer[1] == '=' | |
435 | #ifdef TC_EQUAL_IN_INSN | |
436 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
437 | #endif | |
438 | )) | |
9c6d3f66 | 439 | { |
6efd877d KR |
440 | equals (s); |
441 | demand_empty_rest_of_line (); | |
442 | } | |
443 | else | |
444 | { /* expect pseudo-op or machine instruction */ | |
f8701a3f | 445 | #ifdef MRI |
6efd877d KR |
446 | if (!done_pseudo (s)) |
447 | ||
f8701a3f | 448 | #else |
8ff6f40e ILT |
449 | |
450 | pop = NULL; | |
451 | ||
452 | #ifdef NO_PSEUDO_DOT | |
453 | /* The m88k uses pseudo-ops without a period. */ | |
454 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
cf897ce2 ILT |
455 | if (pop != NULL && pop->poc_handler == NULL) |
456 | pop = NULL; | |
8ff6f40e ILT |
457 | #endif |
458 | ||
459 | if (pop != NULL || *s == '.') | |
6efd877d KR |
460 | { |
461 | /* | |
9471a360 KR |
462 | * PSEUDO - OP. |
463 | * | |
464 | * WARNING: c has next char, which may be end-of-line. | |
465 | * We lookup the pseudo-op table with s+1 because we | |
466 | * already know that the pseudo-op begins with a '.'. | |
467 | */ | |
6efd877d | 468 | |
8ff6f40e ILT |
469 | if (pop == NULL) |
470 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
6efd877d KR |
471 | |
472 | /* Print the error msg now, while we still can */ | |
8ff6f40e | 473 | if (pop == NULL) |
6efd877d KR |
474 | { |
475 | as_bad ("Unknown pseudo-op: `%s'", s); | |
f8701a3f | 476 | *input_line_pointer = c; |
6efd877d KR |
477 | s_ignore (0); |
478 | break; | |
479 | } | |
480 | ||
481 | /* Put it back for error messages etc. */ | |
482 | *input_line_pointer = c; | |
9c6d3f66 KR |
483 | /* The following skip of whitespace is compulsory. |
484 | A well shaped space is sometimes all that separates | |
485 | keyword from operands. */ | |
6efd877d KR |
486 | if (c == ' ' || c == '\t') |
487 | { | |
488 | input_line_pointer++; | |
489 | } /* Skip seperator after keyword. */ | |
490 | /* | |
9471a360 KR |
491 | * Input_line is restored. |
492 | * Input_line_pointer->1st non-blank char | |
493 | * after pseudo-operation. | |
494 | */ | |
6efd877d KR |
495 | if (!pop) |
496 | { | |
497 | ignore_rest_of_line (); | |
498 | break; | |
499 | } | |
500 | else | |
501 | { | |
502 | (*pop->poc_handler) (pop->poc_val); | |
503 | } /* if we have one */ | |
504 | } | |
505 | else | |
f8701a3f | 506 | #endif |
6efd877d KR |
507 | { /* machine instruction */ |
508 | /* WARNING: c has char, which may be end-of-line. */ | |
509 | /* Also: input_line_pointer->`\0` where c was. */ | |
510 | *input_line_pointer = c; | |
58d4951d | 511 | while (!is_end_of_line[(unsigned char) *input_line_pointer] |
4064305e SS |
512 | #ifdef TC_EOL_IN_INSN |
513 | || TC_EOL_IN_INSN (input_line_pointer) | |
514 | #endif | |
515 | ) | |
6efd877d KR |
516 | { |
517 | input_line_pointer++; | |
518 | } | |
f8701a3f | 519 | |
6efd877d KR |
520 | c = *input_line_pointer; |
521 | *input_line_pointer = '\0'; | |
f8701a3f | 522 | |
6efd877d | 523 | md_assemble (s); /* Assemble 1 instruction. */ |
f8701a3f | 524 | |
6efd877d | 525 | *input_line_pointer++ = c; |
f8701a3f | 526 | |
6efd877d KR |
527 | /* We resume loop AFTER the end-of-line from this instruction */ |
528 | } /* if (*s=='.') */ | |
529 | ||
530 | } /* if c==':' */ | |
f8701a3f | 531 | continue; |
6efd877d | 532 | } /* if (is_name_beginner(c) */ |
f8701a3f | 533 | |
f8701a3f | 534 | |
58d4951d | 535 | if (is_end_of_line[(unsigned char) c]) |
6efd877d | 536 | { |
f8701a3f | 537 | continue; |
6efd877d KR |
538 | } /* empty statement */ |
539 | ||
540 | ||
541 | #if defined(LOCAL_LABELS_DOLLAR) || defined(LOCAL_LABELS_FB) | |
542 | if (isdigit (c)) | |
543 | { /* local label ("4:") */ | |
544 | char *backup = input_line_pointer; | |
545 | ||
546 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
547 | ||
548 | temp = c - '0'; | |
549 | ||
550 | while (isdigit (*input_line_pointer)) | |
551 | { | |
552 | temp = (temp * 10) + *input_line_pointer - '0'; | |
553 | ++input_line_pointer; | |
554 | } /* read the whole number */ | |
555 | ||
556 | #ifdef LOCAL_LABELS_DOLLAR | |
557 | if (*input_line_pointer == '$' | |
558 | && *(input_line_pointer + 1) == ':') | |
559 | { | |
560 | input_line_pointer += 2; | |
561 | ||
562 | if (dollar_label_defined (temp)) | |
563 | { | |
564 | as_fatal ("label \"%d$\" redefined", temp); | |
565 | } | |
566 | ||
567 | define_dollar_label (temp); | |
568 | colon (dollar_label_name (temp, 0)); | |
569 | continue; | |
570 | } | |
f8701a3f | 571 | #endif /* LOCAL_LABELS_DOLLAR */ |
6efd877d | 572 | |
f8701a3f | 573 | #ifdef LOCAL_LABELS_FB |
6efd877d KR |
574 | if (*input_line_pointer++ == ':') |
575 | { | |
576 | fb_label_instance_inc (temp); | |
577 | colon (fb_label_name (temp, 0)); | |
578 | continue; | |
579 | } | |
f8701a3f | 580 | #endif /* LOCAL_LABELS_FB */ |
6efd877d KR |
581 | |
582 | input_line_pointer = backup; | |
583 | } /* local label ("4:") */ | |
f8701a3f SC |
584 | #endif /* LOCAL_LABELS_DOLLAR or LOCAL_LABELS_FB */ |
585 | ||
6efd877d KR |
586 | if (c && strchr (line_comment_chars, c)) |
587 | { /* Its a comment. Better say APP or NO_APP */ | |
f8701a3f SC |
588 | char *ends; |
589 | char *new_buf; | |
590 | char *new_tmp; | |
604633ae | 591 | unsigned int new_length; |
f8701a3f | 592 | char *tmp_buf = 0; |
6efd877d KR |
593 | extern char *scrub_string, *scrub_last_string; |
594 | ||
595 | bump_line_counters (); | |
596 | s = input_line_pointer; | |
597 | if (strncmp (s, "APP\n", 4)) | |
598 | continue; /* We ignore it */ | |
599 | s += 4; | |
600 | ||
601 | ends = strstr (s, "#NO_APP\n"); | |
602 | ||
603 | if (!ends) | |
604 | { | |
604633ae ILT |
605 | unsigned int tmp_len; |
606 | unsigned int num; | |
6efd877d | 607 | |
f8701a3f SC |
608 | /* The end of the #APP wasn't in this buffer. We |
609 | keep reading in buffers until we find the #NO_APP | |
610 | that goes with this #APP There is one. The specs | |
611 | guarentee it. . . */ | |
6efd877d | 612 | tmp_len = buffer_limit - s; |
85825401 | 613 | tmp_buf = xmalloc (tmp_len + 1); |
4380166d | 614 | memcpy (tmp_buf, s, tmp_len); |
6efd877d KR |
615 | do |
616 | { | |
617 | new_tmp = input_scrub_next_buffer (&buffer); | |
f8701a3f | 618 | if (!new_tmp) |
6efd877d | 619 | break; |
f8701a3f | 620 | else |
6efd877d | 621 | buffer_limit = new_tmp; |
f8701a3f | 622 | input_line_pointer = buffer; |
6efd877d | 623 | ends = strstr (buffer, "#NO_APP\n"); |
f8701a3f | 624 | if (ends) |
6efd877d | 625 | num = ends - buffer; |
f8701a3f | 626 | else |
6efd877d KR |
627 | num = buffer_limit - buffer; |
628 | ||
629 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
4380166d | 630 | memcpy (tmp_buf, buffer + tmp_len, num); |
6efd877d KR |
631 | tmp_len += num; |
632 | } | |
633 | while (!ends); | |
634 | ||
635 | input_line_pointer = ends ? ends + 8 : NULL; | |
636 | ||
637 | s = tmp_buf; | |
638 | ends = s + tmp_len; | |
639 | ||
640 | } | |
641 | else | |
642 | { | |
643 | input_line_pointer = ends + 8; | |
644 | } | |
645 | new_buf = xmalloc (100); | |
646 | new_length = 100; | |
647 | new_tmp = new_buf; | |
648 | ||
649 | scrub_string = s; | |
f8701a3f | 650 | scrub_last_string = ends; |
6efd877d KR |
651 | for (;;) |
652 | { | |
f8701a3f SC |
653 | int ch; |
654 | ||
6efd877d KR |
655 | ch = do_scrub_next_char (scrub_from_string, scrub_to_string); |
656 | if (ch == EOF) | |
657 | break; | |
658 | *new_tmp++ = ch; | |
659 | if (new_tmp == new_buf + new_length) | |
660 | { | |
661 | new_buf = xrealloc (new_buf, new_length + 100); | |
662 | new_tmp = new_buf + new_length; | |
663 | new_length += 100; | |
f8701a3f | 664 | } |
fecd2382 | 665 | } |
f8701a3f SC |
666 | |
667 | if (tmp_buf) | |
6efd877d KR |
668 | free (tmp_buf); |
669 | old_buffer = buffer; | |
670 | old_input = input_line_pointer; | |
671 | old_limit = buffer_limit; | |
672 | buffer = new_buf; | |
673 | input_line_pointer = new_buf; | |
674 | buffer_limit = new_tmp; | |
f8701a3f SC |
675 | continue; |
676 | } | |
677 | ||
6efd877d | 678 | HANDLE_CONDITIONAL_ASSEMBLY (); |
f8701a3f SC |
679 | |
680 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
681 | input_line_pointer--; /* Report unknown char as ignored. */ | |
6efd877d KR |
682 | ignore_rest_of_line (); |
683 | } /* while (input_line_pointer<buffer_limit) */ | |
684 | if (old_buffer) | |
685 | { | |
686 | bump_line_counters (); | |
687 | if (old_input != 0) | |
688 | { | |
689 | buffer = old_buffer; | |
690 | input_line_pointer = old_input; | |
691 | buffer_limit = old_limit; | |
f8701a3f SC |
692 | old_buffer = 0; |
693 | goto contin; | |
694 | } | |
695 | } | |
6efd877d KR |
696 | } /* while (more buffers to scan) */ |
697 | input_scrub_close (); /* Close the input file */ | |
f8701a3f | 698 | |
6efd877d | 699 | } /* read_a_source_file() */ |
fecd2382 | 700 | |
6efd877d | 701 | void |
604633ae ILT |
702 | s_abort (ignore) |
703 | int ignore; | |
6efd877d KR |
704 | { |
705 | as_fatal (".abort detected. Abandoning ship."); | |
706 | } /* s_abort() */ | |
fecd2382 RP |
707 | |
708 | /* For machines where ".align 4" means align to a 4 byte boundary. */ | |
6efd877d KR |
709 | void |
710 | s_align_bytes (arg) | |
711 | int arg; | |
fecd2382 | 712 | { |
6efd877d KR |
713 | register unsigned int temp; |
714 | register long temp_fill; | |
715 | unsigned int i = 0; | |
716 | unsigned long max_alignment = 1 << 15; | |
f8701a3f | 717 | |
58d4951d | 718 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
719 | temp = arg; /* Default value from pseudo-op table */ |
720 | else | |
721 | temp = get_absolute_expression (); | |
f8701a3f | 722 | |
6efd877d KR |
723 | if (temp > max_alignment) |
724 | { | |
725 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
f8701a3f SC |
726 | } |
727 | ||
6efd877d | 728 | /* |
f8701a3f SC |
729 | * For the sparc, `.align (1<<n)' actually means `.align n' |
730 | * so we have to convert it. | |
731 | */ | |
6efd877d KR |
732 | if (temp != 0) |
733 | { | |
734 | for (i = 0; (temp & 1) == 0; temp >>= 1, ++i) | |
735 | ; | |
f8701a3f | 736 | } |
6efd877d KR |
737 | if (temp != 1) |
738 | as_bad ("Alignment not a power of 2"); | |
f8701a3f | 739 | |
6efd877d KR |
740 | temp = i; |
741 | if (*input_line_pointer == ',') | |
742 | { | |
743 | input_line_pointer++; | |
744 | temp_fill = get_absolute_expression (); | |
f8701a3f | 745 | } |
9471a360 | 746 | else if (now_seg != data_section && now_seg != bss_section) |
016e0d42 | 747 | temp_fill = NOP_OPCODE; |
6efd877d | 748 | else |
016e0d42 | 749 | temp_fill = 0; |
6efd877d KR |
750 | /* Only make a frag if we HAVE to. . . */ |
751 | if (temp && !need_pass_2) | |
604633ae | 752 | frag_align ((int) temp, (int) temp_fill); |
f8701a3f | 753 | |
604633ae | 754 | record_alignment (now_seg, (int) temp); |
49864cfa | 755 | |
6efd877d KR |
756 | demand_empty_rest_of_line (); |
757 | } /* s_align_bytes() */ | |
fecd2382 RP |
758 | |
759 | /* For machines where ".align 4" means align to 2**4 boundary. */ | |
6efd877d | 760 | void |
604633ae ILT |
761 | s_align_ptwo (ignore) |
762 | int ignore; | |
6efd877d KR |
763 | { |
764 | register int temp; | |
765 | register long temp_fill; | |
766 | long max_alignment = 15; | |
767 | ||
768 | temp = get_absolute_expression (); | |
769 | if (temp > max_alignment) | |
770 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
771 | else if (temp < 0) | |
772 | { | |
773 | as_bad ("Alignment negative. 0 assumed."); | |
774 | temp = 0; | |
775 | } | |
776 | if (*input_line_pointer == ',') | |
777 | { | |
778 | input_line_pointer++; | |
779 | temp_fill = get_absolute_expression (); | |
780 | } | |
9471a360 KR |
781 | /* @@ Fix this right for BFD! */ |
782 | else if (now_seg != data_section && now_seg != bss_section) | |
016e0d42 | 783 | temp_fill = NOP_OPCODE; |
6efd877d KR |
784 | else |
785 | temp_fill = 0; | |
786 | /* Only make a frag if we HAVE to. . . */ | |
787 | if (temp && !need_pass_2) | |
788 | frag_align (temp, (int) temp_fill); | |
789 | ||
790 | record_alignment (now_seg, temp); | |
791 | ||
792 | demand_empty_rest_of_line (); | |
793 | } /* s_align_ptwo() */ | |
794 | ||
795 | void | |
604633ae ILT |
796 | s_comm (ignore) |
797 | int ignore; | |
6efd877d KR |
798 | { |
799 | register char *name; | |
800 | register char c; | |
801 | register char *p; | |
58d4951d | 802 | offsetT temp; |
6efd877d KR |
803 | register symbolS *symbolP; |
804 | ||
805 | name = input_line_pointer; | |
806 | c = get_symbol_end (); | |
807 | /* just after name is now '\0' */ | |
808 | p = input_line_pointer; | |
809 | *p = c; | |
810 | SKIP_WHITESPACE (); | |
811 | if (*input_line_pointer != ',') | |
812 | { | |
813 | as_bad ("Expected comma after symbol-name: rest of line ignored."); | |
814 | ignore_rest_of_line (); | |
815 | return; | |
816 | } | |
817 | input_line_pointer++; /* skip ',' */ | |
818 | if ((temp = get_absolute_expression ()) < 0) | |
819 | { | |
58d4951d | 820 | as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp); |
6efd877d KR |
821 | ignore_rest_of_line (); |
822 | return; | |
823 | } | |
824 | *p = 0; | |
825 | symbolP = symbol_find_or_make (name); | |
826 | *p = c; | |
827 | if (S_IS_DEFINED (symbolP)) | |
828 | { | |
829 | as_bad ("Ignoring attempt to re-define symbol"); | |
830 | ignore_rest_of_line (); | |
831 | return; | |
832 | } | |
833 | if (S_GET_VALUE (symbolP)) | |
834 | { | |
58d4951d ILT |
835 | if (S_GET_VALUE (symbolP) != (valueT) temp) |
836 | as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.", | |
6efd877d | 837 | S_GET_NAME (symbolP), |
58d4951d ILT |
838 | (long) S_GET_VALUE (symbolP), |
839 | (long) temp); | |
6efd877d KR |
840 | } |
841 | else | |
842 | { | |
58d4951d | 843 | S_SET_VALUE (symbolP, (valueT) temp); |
6efd877d KR |
844 | S_SET_EXTERNAL (symbolP); |
845 | } | |
9471a360 | 846 | #ifdef OBJ_VMS |
4064305e SS |
847 | if ( (!temp) || !flagseen['1']) |
848 | S_GET_OTHER(symbolP) = const_flag; | |
9471a360 | 849 | #endif /* not OBJ_VMS */ |
6efd877d KR |
850 | know (symbolP->sy_frag == &zero_address_frag); |
851 | demand_empty_rest_of_line (); | |
852 | } /* s_comm() */ | |
fecd2382 RP |
853 | |
854 | void | |
604633ae ILT |
855 | s_data (ignore) |
856 | int ignore; | |
fecd2382 | 857 | { |
ffffc8fb | 858 | segT section; |
6efd877d | 859 | register int temp; |
f8701a3f | 860 | |
6efd877d | 861 | temp = get_absolute_expression (); |
ffffc8fb ILT |
862 | if (flagseen['R']) |
863 | { | |
864 | section = text_section; | |
865 | temp += 1000; | |
866 | } | |
867 | else | |
868 | section = data_section; | |
869 | ||
ffffc8fb | 870 | subseg_set (section, (subsegT) temp); |
f8701a3f | 871 | |
9471a360 | 872 | #ifdef OBJ_VMS |
6efd877d | 873 | const_flag = 0; |
fecd2382 | 874 | #endif |
6efd877d | 875 | demand_empty_rest_of_line (); |
fecd2382 RP |
876 | } |
877 | ||
9a7d824a ILT |
878 | /* Handle the .appfile pseudo-op. This is automatically generated by |
879 | do_scrub_next_char when a preprocessor # line comment is seen with | |
880 | a file name. This default definition may be overridden by the | |
881 | object or CPU specific pseudo-ops. This function is also the | |
882 | default definition for .file; the APPFILE argument is 1 for | |
883 | .appfile, 0 for .file. */ | |
884 | ||
6efd877d | 885 | void |
9a7d824a ILT |
886 | s_app_file (appfile) |
887 | int appfile; | |
6efd877d KR |
888 | { |
889 | register char *s; | |
890 | int length; | |
f8701a3f | 891 | |
6efd877d KR |
892 | /* Some assemblers tolerate immediately following '"' */ |
893 | if ((s = demand_copy_string (&length)) != 0) | |
894 | { | |
9a7d824a ILT |
895 | /* If this is a fake .appfile, a fake newline was inserted into |
896 | the buffer. Passing -2 to new_logical_line tells it to | |
897 | account for it. */ | |
898 | new_logical_line (s, appfile ? -2 : -1); | |
6efd877d | 899 | demand_empty_rest_of_line (); |
9a7d824a ILT |
900 | #ifdef LISTING |
901 | if (listing) | |
902 | listing_source_file (s); | |
903 | #endif | |
6efd877d | 904 | } |
fecd2382 | 905 | #ifdef OBJ_COFF |
6efd877d | 906 | c_dot_file_symbol (s); |
fecd2382 | 907 | #endif /* OBJ_COFF */ |
40324362 KR |
908 | #ifdef OBJ_ELF |
909 | elf_file_symbol (s); | |
910 | #endif | |
911 | } | |
fecd2382 | 912 | |
9a7d824a ILT |
913 | /* Handle the .appline pseudo-op. This is automatically generated by |
914 | do_scrub_next_char when a preprocessor # line comment is seen. | |
915 | This default definition may be overridden by the object or CPU | |
916 | specific pseudo-ops. */ | |
917 | ||
918 | void | |
604633ae ILT |
919 | s_app_line (ignore) |
920 | int ignore; | |
9a7d824a ILT |
921 | { |
922 | int l; | |
923 | ||
924 | /* The given number is that of the next line. */ | |
925 | l = get_absolute_expression () - 1; | |
926 | new_logical_line ((char *) NULL, l); | |
927 | #ifdef LISTING | |
928 | if (listing) | |
929 | listing_source_line (l); | |
930 | #endif | |
931 | demand_empty_rest_of_line (); | |
932 | } | |
933 | ||
6efd877d | 934 | void |
604633ae ILT |
935 | s_fill (ignore) |
936 | int ignore; | |
6efd877d KR |
937 | { |
938 | long temp_repeat = 0; | |
939 | long temp_size = 1; | |
940 | register long temp_fill = 0; | |
941 | char *p; | |
f8701a3f | 942 | |
7c2d4011 | 943 | |
6efd877d KR |
944 | temp_repeat = get_absolute_expression (); |
945 | if (*input_line_pointer == ',') | |
946 | { | |
947 | input_line_pointer++; | |
948 | temp_size = get_absolute_expression (); | |
949 | if (*input_line_pointer == ',') | |
7c2d4011 SC |
950 | { |
951 | input_line_pointer++; | |
6efd877d | 952 | temp_fill = get_absolute_expression (); |
fecd2382 | 953 | } |
6efd877d | 954 | } |
c8863a58 | 955 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ |
fecd2382 | 956 | #define BSD_FILL_SIZE_CROCK_8 (8) |
6efd877d KR |
957 | if (temp_size > BSD_FILL_SIZE_CROCK_8) |
958 | { | |
959 | as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); | |
960 | temp_size = BSD_FILL_SIZE_CROCK_8; | |
961 | } | |
962 | if (temp_size < 0) | |
963 | { | |
964 | as_warn ("Size negative: .fill ignored."); | |
965 | temp_size = 0; | |
966 | } | |
967 | else if (temp_repeat <= 0) | |
968 | { | |
969 | as_warn ("Repeat < 0, .fill ignored"); | |
970 | temp_size = 0; | |
971 | } | |
7fd3560a | 972 | |
6efd877d KR |
973 | if (temp_size && !need_pass_2) |
974 | { | |
975 | p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0); | |
604633ae | 976 | memset (p, 0, (unsigned int) temp_size); |
c8863a58 KR |
977 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX |
978 | * flavoured AS. The following bizzare behaviour is to be | |
979 | * compatible with above. I guess they tried to take up to 8 | |
980 | * bytes from a 4-byte expression and they forgot to sign | |
981 | * extend. Un*x Sux. */ | |
fecd2382 | 982 | #define BSD_FILL_SIZE_CROCK_4 (4) |
604633ae | 983 | md_number_to_chars (p, (valueT) temp_fill, |
c8863a58 KR |
984 | (temp_size > BSD_FILL_SIZE_CROCK_4 |
985 | ? BSD_FILL_SIZE_CROCK_4 | |
986 | : (int) temp_size)); | |
987 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
988 | * but emits no error message because it seems a legal thing to do. | |
989 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
990 | */ | |
6efd877d | 991 | } |
6efd877d | 992 | demand_empty_rest_of_line (); |
f8701a3f SC |
993 | } |
994 | ||
6efd877d | 995 | void |
604633ae ILT |
996 | s_globl (ignore) |
997 | int ignore; | |
6efd877d | 998 | { |
40324362 KR |
999 | char *name; |
1000 | int c; | |
1001 | symbolS *symbolP; | |
fecd2382 | 1002 | |
6efd877d KR |
1003 | do |
1004 | { | |
1005 | name = input_line_pointer; | |
1006 | c = get_symbol_end (); | |
1007 | symbolP = symbol_find_or_make (name); | |
1008 | *input_line_pointer = c; | |
1009 | SKIP_WHITESPACE (); | |
1010 | S_SET_EXTERNAL (symbolP); | |
1011 | if (c == ',') | |
1012 | { | |
1013 | input_line_pointer++; | |
1014 | SKIP_WHITESPACE (); | |
1015 | if (*input_line_pointer == '\n') | |
1016 | c = '\n'; | |
1017 | } | |
1018 | } | |
1019 | while (c == ','); | |
1020 | demand_empty_rest_of_line (); | |
40324362 | 1021 | } |
6efd877d KR |
1022 | |
1023 | void | |
1024 | s_lcomm (needs_align) | |
c8863a58 KR |
1025 | /* 1 if this was a ".bss" directive, which may require a 3rd argument |
1026 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1027 | int needs_align; | |
fecd2382 | 1028 | { |
6efd877d KR |
1029 | register char *name; |
1030 | register char c; | |
1031 | register char *p; | |
1032 | register int temp; | |
1033 | register symbolS *symbolP; | |
9a7d824a ILT |
1034 | segT current_seg = now_seg; |
1035 | subsegT current_subseg = now_subseg; | |
6efd877d KR |
1036 | const int max_alignment = 15; |
1037 | int align = 0; | |
9a7d824a | 1038 | segT bss_seg = bss_section; |
6efd877d KR |
1039 | |
1040 | name = input_line_pointer; | |
1041 | c = get_symbol_end (); | |
1042 | p = input_line_pointer; | |
1043 | *p = c; | |
1044 | SKIP_WHITESPACE (); | |
1045 | if (*input_line_pointer != ',') | |
1046 | { | |
1047 | as_bad ("Expected comma after name"); | |
1048 | ignore_rest_of_line (); | |
1049 | return; | |
1050 | } | |
f8701a3f | 1051 | |
6efd877d | 1052 | ++input_line_pointer; |
f8701a3f | 1053 | |
6efd877d KR |
1054 | if (*input_line_pointer == '\n') |
1055 | { | |
1056 | as_bad ("Missing size expression"); | |
1057 | return; | |
1058 | } | |
f8701a3f | 1059 | |
6efd877d KR |
1060 | if ((temp = get_absolute_expression ()) < 0) |
1061 | { | |
1062 | as_warn ("BSS length (%d.) <0! Ignored.", temp); | |
1063 | ignore_rest_of_line (); | |
1064 | return; | |
1065 | } | |
f8701a3f | 1066 | |
9a7d824a ILT |
1067 | #ifdef TC_MIPS |
1068 | #ifdef OBJ_ECOFF | |
1069 | /* For MIPS ECOFF, small objects are put in .sbss. */ | |
1070 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1071 | bss_seg = subseg_new (".sbss", 1); | |
1072 | #endif | |
1073 | #endif | |
1074 | ||
6efd877d KR |
1075 | if (needs_align) |
1076 | { | |
1077 | align = 0; | |
1078 | SKIP_WHITESPACE (); | |
1079 | if (*input_line_pointer != ',') | |
1080 | { | |
1081 | as_bad ("Expected comma after size"); | |
1082 | ignore_rest_of_line (); | |
1083 | return; | |
1084 | } | |
1085 | input_line_pointer++; | |
1086 | SKIP_WHITESPACE (); | |
1087 | if (*input_line_pointer == '\n') | |
1088 | { | |
1089 | as_bad ("Missing alignment"); | |
1090 | return; | |
1091 | } | |
1092 | align = get_absolute_expression (); | |
1093 | if (align > max_alignment) | |
1094 | { | |
1095 | align = max_alignment; | |
1096 | as_warn ("Alignment too large: %d. assumed.", align); | |
1097 | } | |
1098 | else if (align < 0) | |
1099 | { | |
1100 | align = 0; | |
1101 | as_warn ("Alignment negative. 0 assumed."); | |
1102 | } | |
9a7d824a | 1103 | record_alignment (bss_seg, align); |
6efd877d | 1104 | } /* if needs align */ |
f8701a3f | 1105 | |
6efd877d KR |
1106 | *p = 0; |
1107 | symbolP = symbol_find_or_make (name); | |
1108 | *p = c; | |
f8701a3f | 1109 | |
6efd877d | 1110 | if ( |
fecd2382 | 1111 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
6efd877d KR |
1112 | S_GET_OTHER (symbolP) == 0 && |
1113 | S_GET_DESC (symbolP) == 0 && | |
fecd2382 | 1114 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
9a7d824a | 1115 | (S_GET_SEGMENT (symbolP) == bss_seg |
6efd877d KR |
1116 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) |
1117 | { | |
604633ae | 1118 | char *pfrag; |
85825401 | 1119 | |
9a7d824a | 1120 | subseg_set (bss_seg, 1); |
85825401 ILT |
1121 | |
1122 | if (align) | |
1123 | frag_align (align, 0); | |
1124 | /* detach from old frag */ | |
9a7d824a | 1125 | if (S_GET_SEGMENT (symbolP) == bss_seg) |
85825401 ILT |
1126 | symbolP->sy_frag->fr_symbol = NULL; |
1127 | ||
1128 | symbolP->sy_frag = frag_now; | |
604633ae ILT |
1129 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
1130 | temp, (char *)0); | |
1131 | *pfrag = 0; | |
f8701a3f | 1132 | |
9a7d824a | 1133 | S_SET_SEGMENT (symbolP, bss_seg); |
85825401 | 1134 | |
fecd2382 | 1135 | #ifdef OBJ_COFF |
6efd877d | 1136 | /* The symbol may already have been created with a preceding |
c8863a58 KR |
1137 | ".globl" directive -- be careful not to step on storage class |
1138 | in that case. Otherwise, set it to static. */ | |
6efd877d KR |
1139 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) |
1140 | { | |
1141 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
fecd2382 | 1142 | } |
6efd877d | 1143 | #endif /* OBJ_COFF */ |
6efd877d KR |
1144 | } |
1145 | else | |
1146 | { | |
85825401 | 1147 | as_bad ("Ignoring attempt to re-define symbol %s.", name); |
6efd877d | 1148 | } |
f8701a3f | 1149 | |
9a7d824a | 1150 | subseg_set (current_seg, current_subseg); |
9a7d824a ILT |
1151 | |
1152 | demand_empty_rest_of_line (); | |
6efd877d | 1153 | } /* s_lcomm() */ |
fecd2382 | 1154 | |
6efd877d | 1155 | void |
604633ae ILT |
1156 | s_lsym (ignore) |
1157 | int ignore; | |
6efd877d KR |
1158 | { |
1159 | register char *name; | |
1160 | register char c; | |
1161 | register char *p; | |
6efd877d KR |
1162 | expressionS exp; |
1163 | register symbolS *symbolP; | |
1164 | ||
1165 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
1166 | name = input_line_pointer; | |
1167 | c = get_symbol_end (); | |
1168 | p = input_line_pointer; | |
1169 | *p = c; | |
1170 | SKIP_WHITESPACE (); | |
1171 | if (*input_line_pointer != ',') | |
1172 | { | |
1173 | *p = 0; | |
1174 | as_bad ("Expected comma after name \"%s\"", name); | |
1175 | *p = c; | |
1176 | ignore_rest_of_line (); | |
1177 | return; | |
1178 | } | |
1179 | input_line_pointer++; | |
b31f2abb KR |
1180 | expression (&exp); |
1181 | if (exp.X_op != O_constant | |
1182 | && exp.X_op != O_register) | |
1183 | { | |
1184 | as_bad ("bad expression"); | |
1185 | ignore_rest_of_line (); | |
1186 | return; | |
1187 | } | |
6efd877d KR |
1188 | *p = 0; |
1189 | symbolP = symbol_find_or_make (name); | |
f8701a3f | 1190 | |
c8863a58 KR |
1191 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && |
1192 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
1193 | those fields, and I can't see when they'd ever be tripped. I | |
1194 | don't think I understand why they were here so I may have | |
1195 | introduced a bug. As recently as 1.37 didn't have this test | |
1196 | anyway. xoxorich. */ | |
f8701a3f | 1197 | |
9471a360 | 1198 | if (S_GET_SEGMENT (symbolP) == undefined_section |
6efd877d KR |
1199 | && S_GET_VALUE (symbolP) == 0) |
1200 | { | |
c8863a58 KR |
1201 | /* The name might be an undefined .global symbol; be sure to |
1202 | keep the "external" bit. */ | |
b31f2abb KR |
1203 | S_SET_SEGMENT (symbolP, |
1204 | (exp.X_op == O_constant | |
1205 | ? absolute_section | |
1206 | : reg_section)); | |
1207 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
6efd877d KR |
1208 | } |
1209 | else | |
1210 | { | |
1211 | as_bad ("Symbol %s already defined", name); | |
1212 | } | |
1213 | *p = c; | |
1214 | demand_empty_rest_of_line (); | |
1215 | } /* s_lsym() */ | |
1216 | ||
1217 | void | |
604633ae ILT |
1218 | s_org (ignore) |
1219 | int ignore; | |
6efd877d KR |
1220 | { |
1221 | register segT segment; | |
1222 | expressionS exp; | |
1223 | register long temp_fill; | |
1224 | register char *p; | |
9471a360 KR |
1225 | /* Don't believe the documentation of BSD 4.2 AS. There is no such |
1226 | thing as a sub-segment-relative origin. Any absolute origin is | |
1227 | given a warning, then assumed to be segment-relative. Any | |
1228 | segmented origin expression ("foo+42") had better be in the right | |
1229 | segment or the .org is ignored. | |
1230 | ||
1231 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
1232 | we never know sub-segment sizes when we are reading code. BSD | |
1233 | will crash trying to emit negative numbers of filler bytes in | |
1234 | certain .orgs. We don't crash, but see as-write for that code. | |
1235 | ||
1236 | Don't make frag if need_pass_2==1. */ | |
6efd877d KR |
1237 | segment = get_known_segmented_expression (&exp); |
1238 | if (*input_line_pointer == ',') | |
1239 | { | |
1240 | input_line_pointer++; | |
1241 | temp_fill = get_absolute_expression (); | |
1242 | } | |
1243 | else | |
1244 | temp_fill = 0; | |
1245 | if (!need_pass_2) | |
1246 | { | |
9471a360 | 1247 | if (segment != now_seg && segment != absolute_section) |
6efd877d KR |
1248 | as_bad ("Invalid segment \"%s\". Segment \"%s\" assumed.", |
1249 | segment_name (segment), segment_name (now_seg)); | |
1250 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp.X_add_symbol, | |
1251 | exp.X_add_number, (char *) 0); | |
1252 | *p = temp_fill; | |
1253 | } /* if (ok to make frag) */ | |
1254 | demand_empty_rest_of_line (); | |
1255 | } /* s_org() */ | |
1256 | ||
1257 | void | |
604633ae ILT |
1258 | s_set (ignore) |
1259 | int ignore; | |
6efd877d KR |
1260 | { |
1261 | register char *name; | |
1262 | register char delim; | |
1263 | register char *end_name; | |
1264 | register symbolS *symbolP; | |
1265 | ||
1266 | /* | |
c8863a58 KR |
1267 | * Especial apologies for the random logic: |
1268 | * this just grew, and could be parsed much more simply! | |
1269 | * Dean in haste. | |
1270 | */ | |
6efd877d KR |
1271 | name = input_line_pointer; |
1272 | delim = get_symbol_end (); | |
1273 | end_name = input_line_pointer; | |
1274 | *end_name = delim; | |
1275 | SKIP_WHITESPACE (); | |
f8701a3f | 1276 | |
6efd877d KR |
1277 | if (*input_line_pointer != ',') |
1278 | { | |
1279 | *end_name = 0; | |
1280 | as_bad ("Expected comma after name \"%s\"", name); | |
1281 | *end_name = delim; | |
1282 | ignore_rest_of_line (); | |
1283 | return; | |
1284 | } | |
1285 | ||
1286 | input_line_pointer++; | |
1287 | *end_name = 0; | |
1288 | ||
1289 | if (name[0] == '.' && name[1] == '\0') | |
1290 | { | |
1291 | /* Turn '. = mumble' into a .org mumble */ | |
1292 | register segT segment; | |
1293 | expressionS exp; | |
1294 | register char *ptr; | |
1295 | ||
1296 | segment = get_known_segmented_expression (&exp); | |
f8701a3f | 1297 | |
6efd877d KR |
1298 | if (!need_pass_2) |
1299 | { | |
9471a360 | 1300 | if (segment != now_seg && segment != absolute_section) |
6efd877d KR |
1301 | as_bad ("Invalid segment \"%s\". Segment \"%s\" assumed.", |
1302 | segment_name (segment), | |
1303 | segment_name (now_seg)); | |
1304 | ptr = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp.X_add_symbol, | |
1305 | exp.X_add_number, (char *) 0); | |
1306 | *ptr = 0; | |
1307 | } /* if (ok to make frag) */ | |
1308 | ||
1309 | *end_name = delim; | |
1310 | return; | |
1311 | } | |
1312 | ||
1313 | if ((symbolP = symbol_find (name)) == NULL | |
1314 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
1315 | { | |
9471a360 | 1316 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); |
fecd2382 | 1317 | #ifdef OBJ_COFF |
6efd877d KR |
1318 | /* "set" symbols are local unless otherwise specified. */ |
1319 | SF_SET_LOCAL (symbolP); | |
fecd2382 | 1320 | #endif /* OBJ_COFF */ |
f8701a3f | 1321 | |
6efd877d | 1322 | } /* make a new symbol */ |
f8701a3f | 1323 | |
6efd877d | 1324 | symbol_table_insert (symbolP); |
f8701a3f | 1325 | |
6efd877d KR |
1326 | *end_name = delim; |
1327 | pseudo_set (symbolP); | |
1328 | demand_empty_rest_of_line (); | |
1329 | } /* s_set() */ | |
fecd2382 | 1330 | |
6efd877d KR |
1331 | void |
1332 | s_space (mult) | |
1333 | int mult; | |
b53ccaac | 1334 | { |
6efd877d KR |
1335 | long temp_repeat; |
1336 | register long temp_fill; | |
1337 | register char *p; | |
1338 | ||
1339 | /* Just like .fill, but temp_size = 1 */ | |
1340 | if (get_absolute_expression_and_terminator (&temp_repeat) == ',') | |
1341 | { | |
1342 | temp_fill = get_absolute_expression (); | |
1343 | } | |
1344 | else | |
1345 | { | |
1346 | input_line_pointer--; /* Backup over what was not a ','. */ | |
1347 | temp_fill = 0; | |
1348 | } | |
1349 | if (mult) | |
1350 | { | |
bf449293 | 1351 | temp_repeat *= mult; |
6efd877d KR |
1352 | } |
1353 | if (temp_repeat <= 0) | |
1354 | { | |
1355 | as_warn ("Repeat < 0, .space ignored"); | |
1356 | ignore_rest_of_line (); | |
1357 | return; | |
1358 | } | |
1359 | if (!need_pass_2) | |
1360 | { | |
1361 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
1362 | temp_repeat, (char *) 0); | |
1363 | *p = temp_fill; | |
1364 | } | |
1365 | demand_empty_rest_of_line (); | |
1366 | } /* s_space() */ | |
fecd2382 RP |
1367 | |
1368 | void | |
604633ae ILT |
1369 | s_text (ignore) |
1370 | int ignore; | |
fecd2382 | 1371 | { |
6efd877d | 1372 | register int temp; |
f8701a3f | 1373 | |
6efd877d | 1374 | temp = get_absolute_expression (); |
9471a360 | 1375 | subseg_set (text_section, (subsegT) temp); |
6efd877d KR |
1376 | demand_empty_rest_of_line (); |
1377 | } /* s_text() */ | |
fecd2382 | 1378 | \f |
6efd877d | 1379 | |
6efd877d KR |
1380 | void |
1381 | demand_empty_rest_of_line () | |
1382 | { | |
1383 | SKIP_WHITESPACE (); | |
58d4951d | 1384 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
1385 | { |
1386 | input_line_pointer++; | |
1387 | } | |
1388 | else | |
1389 | { | |
1390 | ignore_rest_of_line (); | |
1391 | } | |
1392 | /* Return having already swallowed end-of-line. */ | |
1393 | } /* Return pointing just after end-of-line. */ | |
fecd2382 RP |
1394 | |
1395 | void | |
6efd877d | 1396 | ignore_rest_of_line () /* For suspect lines: gives warning. */ |
fecd2382 | 1397 | { |
58d4951d | 1398 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 1399 | { |
6efd877d KR |
1400 | if (isprint (*input_line_pointer)) |
1401 | as_bad ("Rest of line ignored. First ignored character is `%c'.", | |
f8701a3f SC |
1402 | *input_line_pointer); |
1403 | else | |
6efd877d | 1404 | as_bad ("Rest of line ignored. First ignored character valued 0x%x.", |
f8701a3f SC |
1405 | *input_line_pointer); |
1406 | while (input_line_pointer < buffer_limit | |
58d4951d | 1407 | && !is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 1408 | { |
6efd877d | 1409 | input_line_pointer++; |
f8701a3f SC |
1410 | } |
1411 | } | |
6efd877d | 1412 | input_line_pointer++; /* Return pointing just after end-of-line. */ |
58d4951d | 1413 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); |
fecd2382 RP |
1414 | } |
1415 | ||
1416 | /* | |
1417 | * pseudo_set() | |
1418 | * | |
1419 | * In: Pointer to a symbol. | |
1420 | * Input_line_pointer->expression. | |
1421 | * | |
1422 | * Out: Input_line_pointer->just after any whitespace after expression. | |
1423 | * Tried to set symbol to value of expression. | |
1424 | * Will change symbols type, value, and frag; | |
fecd2382 RP |
1425 | */ |
1426 | void | |
f8701a3f | 1427 | pseudo_set (symbolP) |
6efd877d | 1428 | symbolS *symbolP; |
fecd2382 | 1429 | { |
6efd877d | 1430 | expressionS exp; |
fecd2382 | 1431 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
f8701a3f | 1432 | int ext; |
fecd2382 | 1433 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 1434 | |
6efd877d | 1435 | know (symbolP); /* NULL pointer is logic error. */ |
fecd2382 | 1436 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
9471a360 | 1437 | /* @@ Fix this right for BFD. */ |
6efd877d | 1438 | ext = S_IS_EXTERNAL (symbolP); |
fecd2382 | 1439 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 1440 | |
5ac34ac3 | 1441 | (void) expression (&exp); |
f8701a3f | 1442 | |
5ac34ac3 ILT |
1443 | if (exp.X_op == O_illegal) |
1444 | as_bad ("illegal expression; zero assumed"); | |
1445 | else if (exp.X_op == O_absent) | |
1446 | as_bad ("missing expression; zero assumed"); | |
1447 | else if (exp.X_op == O_big) | |
1448 | as_bad ("%s number invalid; zero assumed", | |
1449 | exp.X_add_number > 0 ? "bignum" : "floating point"); | |
1450 | else if (exp.X_op == O_subtract | |
1451 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
1452 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
1453 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
1454 | && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) | |
9471a360 | 1455 | { |
5ac34ac3 ILT |
1456 | exp.X_op = O_constant; |
1457 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
1458 | - S_GET_VALUE (exp.X_op_symbol)); | |
9471a360 | 1459 | } |
5ac34ac3 ILT |
1460 | |
1461 | switch (exp.X_op) | |
9471a360 | 1462 | { |
5ac34ac3 ILT |
1463 | case O_illegal: |
1464 | case O_absent: | |
1465 | case O_big: | |
1466 | exp.X_add_number = 0; | |
1467 | /* Fall through. */ | |
1468 | case O_constant: | |
9471a360 | 1469 | S_SET_SEGMENT (symbolP, absolute_section); |
fecd2382 | 1470 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
9471a360 | 1471 | /* @@ Fix this right for BFD. */ |
5ac34ac3 ILT |
1472 | if (ext) |
1473 | S_SET_EXTERNAL (symbolP); | |
6efd877d | 1474 | else |
6efd877d | 1475 | S_CLEAR_EXTERNAL (symbolP); |
fecd2382 | 1476 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
604633ae | 1477 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
6efd877d | 1478 | symbolP->sy_frag = &zero_address_frag; |
5ac34ac3 | 1479 | break; |
f8701a3f | 1480 | |
5ac34ac3 ILT |
1481 | case O_register: |
1482 | S_SET_SEGMENT (symbolP, reg_section); | |
604633ae | 1483 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
5ac34ac3 ILT |
1484 | symbolP->sy_frag = &zero_address_frag; |
1485 | break; | |
1486 | ||
1487 | case O_symbol: | |
1488 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section) | |
1489 | symbolP->sy_value = exp; | |
6efd877d KR |
1490 | else |
1491 | { | |
5ac34ac3 ILT |
1492 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (exp.X_add_symbol)); |
1493 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
1494 | /* @@ Fix this right for BFD! */ | |
1495 | if (ext) | |
1496 | S_SET_EXTERNAL (symbolP); | |
1497 | else | |
1498 | S_CLEAR_EXTERNAL (symbolP); | |
fecd2382 | 1499 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
5ac34ac3 ILT |
1500 | S_SET_VALUE (symbolP, |
1501 | exp.X_add_number + S_GET_VALUE (exp.X_add_symbol)); | |
1502 | symbolP->sy_frag = exp.X_add_symbol->sy_frag; | |
1503 | } | |
1504 | break; | |
f8701a3f | 1505 | |
5ac34ac3 ILT |
1506 | default: |
1507 | /* The value is some complex expression. | |
1508 | FIXME: Should we set the segment to anything? */ | |
1509 | symbolP->sy_value = exp; | |
1510 | break; | |
f8701a3f | 1511 | } |
fecd2382 RP |
1512 | } |
1513 | \f | |
1514 | /* | |
1515 | * cons() | |
1516 | * | |
1517 | * CONStruct more frag of .bytes, or .words etc. | |
1518 | * Should need_pass_2 be 1 then emit no frag(s). | |
80aab579 | 1519 | * This understands EXPRESSIONS. |
fecd2382 RP |
1520 | * |
1521 | * Bug (?) | |
1522 | * | |
1523 | * This has a split personality. We use expression() to read the | |
1524 | * value. We can detect if the value won't fit in a byte or word. | |
1525 | * But we can't detect if expression() discarded significant digits | |
1526 | * in the case of a long. Not worth the crocks required to fix it. | |
1527 | */ | |
1528 | ||
40324362 KR |
1529 | /* Select a parser for cons expressions. */ |
1530 | ||
1531 | /* Some targets need to parse the expression in various fancy ways. | |
1532 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
1533 | (for example, the HPPA does this). Otherwise, you can define | |
1534 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
1535 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
1536 | are defined, which is the normal case, then only simple expressions | |
1537 | are permitted. */ | |
1538 | ||
1539 | #ifndef TC_PARSE_CONS_EXPRESSION | |
1540 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
1541 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
1542 | static void | |
1543 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
1544 | #endif | |
1545 | #ifdef MRI | |
1546 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_mri_cons (EXP) | |
1547 | static void | |
1548 | parse_mri_cons PARAMS ((expressionS *exp)); | |
1549 | #endif | |
1550 | #ifdef REPEAT_CONS_EXPRESSIONS | |
1551 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
1552 | static void | |
1553 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
1554 | #endif | |
1555 | ||
1556 | /* If we haven't gotten one yet, just call expression. */ | |
1557 | #ifndef TC_PARSE_CONS_EXPRESSION | |
1558 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
1559 | #endif | |
1560 | #endif | |
1561 | ||
6efd877d KR |
1562 | /* worker to do .byte etc statements */ |
1563 | /* clobbers input_line_pointer, checks */ | |
1564 | /* end-of-line. */ | |
1565 | void | |
1566 | cons (nbytes) | |
604633ae | 1567 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
fecd2382 | 1568 | { |
6efd877d | 1569 | expressionS exp; |
f8701a3f | 1570 | |
40324362 | 1571 | if (is_it_end_of_statement ()) |
6efd877d | 1572 | { |
40324362 KR |
1573 | demand_empty_rest_of_line (); |
1574 | return; | |
6efd877d | 1575 | } |
40324362 KR |
1576 | |
1577 | do | |
6efd877d | 1578 | { |
604633ae ILT |
1579 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); |
1580 | emit_expr (&exp, (unsigned int) nbytes); | |
40324362 KR |
1581 | } |
1582 | while (*input_line_pointer++ == ','); | |
1583 | ||
1584 | input_line_pointer--; /* Put terminator back into stream. */ | |
1585 | demand_empty_rest_of_line (); | |
1586 | } /* cons() */ | |
f8701a3f | 1587 | |
40324362 KR |
1588 | /* Put the contents of expression EXP into the object file using |
1589 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
f8701a3f | 1590 | |
40324362 KR |
1591 | void |
1592 | emit_expr (exp, nbytes) | |
1593 | expressionS *exp; | |
1594 | unsigned int nbytes; | |
1595 | { | |
5ac34ac3 | 1596 | operatorT op; |
40324362 | 1597 | register char *p; |
80aab579 | 1598 | valueT extra_digit = 0; |
f8701a3f | 1599 | |
40324362 KR |
1600 | /* Don't do anything if we are going to make another pass. */ |
1601 | if (need_pass_2) | |
1602 | return; | |
1603 | ||
5ac34ac3 | 1604 | op = exp->X_op; |
40324362 | 1605 | |
80aab579 ILT |
1606 | /* Handle a negative bignum. */ |
1607 | if (op == O_uminus | |
1608 | && exp->X_add_number == 0 | |
1609 | && exp->X_add_symbol->sy_value.X_op == O_big | |
1610 | && exp->X_add_symbol->sy_value.X_add_number > 0) | |
1611 | { | |
1612 | int i; | |
1613 | unsigned long carry; | |
1614 | ||
1615 | exp = &exp->X_add_symbol->sy_value; | |
1616 | ||
1617 | /* Negate the bignum: one's complement each digit and add 1. */ | |
1618 | carry = 1; | |
1619 | for (i = 0; i < exp->X_add_number; i++) | |
1620 | { | |
1621 | unsigned long next; | |
1622 | ||
1623 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
1624 | & LITTLENUM_MASK) | |
1625 | + carry); | |
1626 | generic_bignum[i] = next & LITTLENUM_MASK; | |
1627 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
1628 | } | |
1629 | ||
1630 | /* We can ignore any carry out, because it will be handled by | |
1631 | extra_digit if it is needed. */ | |
1632 | ||
1633 | extra_digit = (valueT) -1; | |
1634 | op = O_big; | |
1635 | } | |
1636 | ||
5ac34ac3 | 1637 | if (op == O_absent || op == O_illegal) |
6efd877d | 1638 | { |
5ac34ac3 ILT |
1639 | as_warn ("zero assumed for missing expression"); |
1640 | exp->X_add_number = 0; | |
1641 | op = O_constant; | |
6efd877d | 1642 | } |
80aab579 | 1643 | else if (op == O_big && exp->X_add_number <= 0) |
6efd877d | 1644 | { |
80aab579 | 1645 | as_bad ("floating point number invalid; zero assumed"); |
40324362 | 1646 | exp->X_add_number = 0; |
5ac34ac3 | 1647 | op = O_constant; |
40324362 | 1648 | } |
5ac34ac3 | 1649 | else if (op == O_register) |
6efd877d | 1650 | { |
5ac34ac3 ILT |
1651 | as_warn ("register value used as expression"); |
1652 | op = O_constant; | |
40324362 | 1653 | } |
6efd877d | 1654 | |
604633ae | 1655 | p = frag_more ((int) nbytes); |
6efd877d | 1656 | |
40324362 KR |
1657 | #ifndef WORKING_DOT_WORD |
1658 | /* If we have the difference of two symbols in a word, save it on | |
1659 | the broken_words list. See the code in write.c. */ | |
5ac34ac3 | 1660 | if (op == O_subtract && nbytes == 2) |
40324362 KR |
1661 | { |
1662 | struct broken_word *x; | |
1663 | ||
1664 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
1665 | x->next_broken_word = broken_words; | |
1666 | broken_words = x; | |
1667 | x->frag = frag_now; | |
1668 | x->word_goes_here = p; | |
1669 | x->dispfrag = 0; | |
1670 | x->add = exp->X_add_symbol; | |
5ac34ac3 | 1671 | x->sub = exp->X_op_symbol; |
40324362 KR |
1672 | x->addnum = exp->X_add_number; |
1673 | x->added = 0; | |
1674 | new_broken_words++; | |
1675 | return; | |
1676 | } | |
f8701a3f | 1677 | #endif |
6efd877d | 1678 | |
80aab579 ILT |
1679 | /* If we have an integer, but the number of bytes is too large to |
1680 | pass to md_number_to_chars, handle it as a bignum. */ | |
1681 | if (op == O_constant && nbytes > sizeof (valueT)) | |
1682 | { | |
1683 | valueT val; | |
1684 | int gencnt; | |
1685 | ||
1686 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
1687 | extra_digit = (valueT) -1; | |
1688 | val = (valueT) exp->X_add_number; | |
1689 | gencnt = 0; | |
1690 | do | |
1691 | { | |
1692 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
1693 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
1694 | ++gencnt; | |
1695 | } | |
1696 | while (val != 0); | |
1697 | op = exp->X_op = O_big; | |
1698 | exp->X_add_number = gencnt; | |
1699 | } | |
1700 | ||
5ac34ac3 | 1701 | if (op == O_constant) |
40324362 KR |
1702 | { |
1703 | register long get; | |
1704 | register long use; | |
1705 | register long mask; | |
1706 | register long unmask; | |
1707 | ||
1708 | /* JF << of >= number of bits in the object is undefined. In | |
1709 | particular SPARC (Sun 4) has problems */ | |
1710 | if (nbytes >= sizeof (long)) | |
1711 | mask = 0; | |
1712 | else | |
1713 | mask = ~0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */ | |
6efd877d | 1714 | |
40324362 | 1715 | unmask = ~mask; /* Do store these bits. */ |
6efd877d | 1716 | |
40324362 KR |
1717 | #ifdef NEVER |
1718 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
1719 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
1720 | #endif | |
6efd877d | 1721 | |
40324362 KR |
1722 | get = exp->X_add_number; |
1723 | use = get & unmask; | |
1724 | if ((get & mask) != 0 && (get & mask) != mask) | |
1725 | { /* Leading bits contain both 0s & 1s. */ | |
58d4951d | 1726 | as_warn ("Value 0x%lx truncated to 0x%lx.", get, use); |
40324362 | 1727 | } |
604633ae ILT |
1728 | /* put bytes in right order. */ |
1729 | md_number_to_chars (p, (valueT) use, (int) nbytes); | |
40324362 | 1730 | } |
80aab579 ILT |
1731 | else if (op == O_big) |
1732 | { | |
1733 | int size; | |
1734 | LITTLENUM_TYPE *nums; | |
1735 | ||
1736 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
1737 | ||
1738 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
1739 | if (nbytes < size) | |
1740 | { | |
1741 | as_warn ("Bignum truncated to %d bytes", nbytes); | |
1742 | size = nbytes; | |
1743 | } | |
1744 | ||
1745 | if (target_big_endian) | |
1746 | { | |
1747 | while (nbytes > size) | |
1748 | { | |
1749 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
1750 | nbytes -= CHARS_PER_LITTLENUM; | |
1751 | p += CHARS_PER_LITTLENUM; | |
1752 | } | |
1753 | ||
1754 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
1755 | while (size > 0) | |
1756 | { | |
1757 | --nums; | |
1758 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
1759 | size -= CHARS_PER_LITTLENUM; | |
1760 | p += CHARS_PER_LITTLENUM; | |
1761 | } | |
1762 | } | |
1763 | else | |
1764 | { | |
1765 | nums = generic_bignum; | |
1766 | while (size > 0) | |
1767 | { | |
1768 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
1769 | ++nums; | |
1770 | size -= CHARS_PER_LITTLENUM; | |
1771 | p += CHARS_PER_LITTLENUM; | |
1772 | nbytes -= CHARS_PER_LITTLENUM; | |
1773 | } | |
1774 | ||
1775 | while (nbytes > 0) | |
1776 | { | |
1777 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
1778 | nbytes -= CHARS_PER_LITTLENUM; | |
1779 | p += CHARS_PER_LITTLENUM; | |
1780 | } | |
1781 | } | |
1782 | } | |
40324362 KR |
1783 | else |
1784 | { | |
604633ae | 1785 | md_number_to_chars (p, (valueT) 0, (int) nbytes); |
6efd877d | 1786 | |
40324362 KR |
1787 | /* Now we need to generate a fixS to record the symbol value. |
1788 | This is easy for BFD. For other targets it can be more | |
1789 | complex. For very complex cases (currently, the HPPA and | |
1790 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
1791 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
1792 | the name of the reloc code that should be stored in the fixS. | |
1793 | If neither is defined, the code uses NO_RELOC if it is | |
1794 | defined, and otherwise uses 0. */ | |
6efd877d | 1795 | |
40324362 | 1796 | #ifdef BFD_ASSEMBLER |
4064305e SS |
1797 | #ifdef TC_CONS_FIX_NEW |
1798 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
1799 | #else | |
604633ae | 1800 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 1801 | /* @@ Should look at CPU word size. */ |
ba71c54d KR |
1802 | nbytes == 2 ? BFD_RELOC_16 |
1803 | : nbytes == 8 ? BFD_RELOC_64 | |
1804 | : BFD_RELOC_32); | |
4064305e | 1805 | #endif |
40324362 KR |
1806 | #else |
1807 | #ifdef TC_CONS_FIX_NEW | |
1808 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
1809 | #else | |
1810 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
1811 | it is defined, otherwise use NO_RELOC if it is defined, | |
1812 | otherwise use 0. */ | |
1813 | #ifndef TC_CONS_RELOC | |
1814 | #ifdef NO_RELOC | |
1815 | #define TC_CONS_RELOC NO_RELOC | |
1816 | #else | |
1817 | #define TC_CONS_RELOC 0 | |
1818 | #endif | |
1819 | #endif | |
80aab579 | 1820 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 1821 | TC_CONS_RELOC); |
40324362 KR |
1822 | #endif /* TC_CONS_FIX_NEW */ |
1823 | #endif /* BFD_ASSEMBLER */ | |
1824 | } | |
1825 | } | |
1826 | \f | |
1827 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
6efd877d | 1828 | |
40324362 KR |
1829 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as |
1830 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
1831 | then pack them all together. We do a little better in that we allow | |
1832 | them in words, longs, etc. and we'll pack them in target byte order | |
1833 | for you. | |
6efd877d | 1834 | |
40324362 KR |
1835 | The rules are: pack least significat bit first, if a field doesn't |
1836 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
1837 | explicitly *not* even a warning. The bitwidth should be considered | |
1838 | a "mask". | |
6efd877d | 1839 | |
40324362 KR |
1840 | To use this function the tc-XXX.h file should define |
1841 | BITFIELD_CONS_EXPRESSIONS. */ | |
f8701a3f | 1842 | |
40324362 KR |
1843 | static void |
1844 | parse_bitfield_cons (exp, nbytes) | |
1845 | expressionS *exp; | |
1846 | unsigned int nbytes; | |
1847 | { | |
1848 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
1849 | char *hold = input_line_pointer; | |
f8701a3f | 1850 | |
5ac34ac3 | 1851 | (void) expression (exp); |
f8701a3f | 1852 | |
40324362 KR |
1853 | if (*input_line_pointer == ':') |
1854 | { /* bitfields */ | |
1855 | long value = 0; | |
f8701a3f | 1856 | |
40324362 KR |
1857 | for (;;) |
1858 | { | |
1859 | unsigned long width; | |
f8701a3f | 1860 | |
40324362 KR |
1861 | if (*input_line_pointer != ':') |
1862 | { | |
1863 | input_line_pointer = hold; | |
1864 | break; | |
1865 | } /* next piece is not a bitfield */ | |
1866 | ||
1867 | /* In the general case, we can't allow | |
1868 | full expressions with symbol | |
1869 | differences and such. The relocation | |
1870 | entries for symbols not defined in this | |
1871 | assembly would require arbitrary field | |
1872 | widths, positions, and masks which most | |
1873 | of our current object formats don't | |
1874 | support. | |
1875 | ||
1876 | In the specific case where a symbol | |
1877 | *is* defined in this assembly, we | |
1878 | *could* build fixups and track it, but | |
1879 | this could lead to confusion for the | |
1880 | backends. I'm lazy. I'll take any | |
1881 | SEG_ABSOLUTE. I think that means that | |
1882 | you can use a previous .set or | |
1883 | .equ type symbol. xoxorich. */ | |
1884 | ||
5ac34ac3 | 1885 | if (exp->X_op == O_absent) |
6efd877d | 1886 | { |
5ac34ac3 | 1887 | as_warn ("using a bit field width of zero"); |
40324362 | 1888 | exp->X_add_number = 0; |
5ac34ac3 | 1889 | exp->X_op = O_constant; |
40324362 KR |
1890 | } /* implied zero width bitfield */ |
1891 | ||
5ac34ac3 | 1892 | if (exp->X_op != O_constant) |
6efd877d | 1893 | { |
40324362 | 1894 | *input_line_pointer = '\0'; |
5ac34ac3 | 1895 | as_bad ("field width \"%s\" too complex for a bitfield", hold); |
40324362 KR |
1896 | *input_line_pointer = ':'; |
1897 | demand_empty_rest_of_line (); | |
1898 | return; | |
1899 | } /* too complex */ | |
1900 | ||
1901 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
9471a360 | 1902 | { |
80aab579 | 1903 | as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits", |
40324362 KR |
1904 | width, nbytes, (BITS_PER_CHAR * nbytes)); |
1905 | width = BITS_PER_CHAR * nbytes; | |
1906 | } /* too big */ | |
1907 | ||
1908 | if (width > bits_available) | |
9471a360 | 1909 | { |
40324362 KR |
1910 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ |
1911 | input_line_pointer = hold; | |
1912 | exp->X_add_number = value; | |
1913 | break; | |
1914 | } /* won't fit */ | |
1915 | ||
1916 | hold = ++input_line_pointer; /* skip ':' */ | |
1917 | ||
5ac34ac3 ILT |
1918 | (void) expression (exp); |
1919 | if (exp->X_op != O_constant) | |
9471a360 | 1920 | { |
40324362 KR |
1921 | char cache = *input_line_pointer; |
1922 | ||
1923 | *input_line_pointer = '\0'; | |
5ac34ac3 | 1924 | as_bad ("field value \"%s\" too complex for a bitfield", hold); |
40324362 KR |
1925 | *input_line_pointer = cache; |
1926 | demand_empty_rest_of_line (); | |
1927 | return; | |
1928 | } /* too complex */ | |
1929 | ||
5ac34ac3 ILT |
1930 | value |= ((~(-1 << width) & exp->X_add_number) |
1931 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
40324362 KR |
1932 | |
1933 | if ((bits_available -= width) == 0 | |
1934 | || is_it_end_of_statement () | |
1935 | || *input_line_pointer != ',') | |
1936 | { | |
1937 | break; | |
1938 | } /* all the bitfields we're gonna get */ | |
1939 | ||
1940 | hold = ++input_line_pointer; | |
5ac34ac3 | 1941 | (void) expression (exp); |
40324362 KR |
1942 | } /* forever loop */ |
1943 | ||
1944 | exp->X_add_number = value; | |
5ac34ac3 | 1945 | exp->X_op = O_constant; |
80aab579 | 1946 | exp->X_unsigned = 1; |
40324362 KR |
1947 | } /* if looks like a bitfield */ |
1948 | } /* parse_bitfield_cons() */ | |
1949 | ||
1950 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
1951 | \f | |
1952 | #ifdef MRI | |
1953 | ||
1954 | static void | |
1955 | parse_mri_cons (exp, nbytes) | |
1956 | expressionS *exp; | |
1957 | unsigned int nbytes; | |
1958 | { | |
1959 | if (*input_line_pointer == '\'') | |
1960 | { | |
1961 | /* An MRI style string, cut into as many bytes as will fit into | |
1962 | a nbyte chunk, left justify if necessary, and separate with | |
1963 | commas so we can try again later */ | |
1964 | int scan = 0; | |
1965 | unsigned int result = 0; | |
1966 | input_line_pointer++; | |
1967 | for (scan = 0; scan < nbytes; scan++) | |
1968 | { | |
1969 | if (*input_line_pointer == '\'') | |
1970 | { | |
1971 | if (input_line_pointer[1] == '\'') | |
6efd877d | 1972 | { |
40324362 | 1973 | input_line_pointer++; |
f8701a3f | 1974 | } |
40324362 KR |
1975 | else |
1976 | break; | |
9471a360 | 1977 | } |
40324362 KR |
1978 | result = (result << 8) | (*input_line_pointer++); |
1979 | } | |
f8701a3f | 1980 | |
40324362 KR |
1981 | /* Left justify */ |
1982 | while (scan < nbytes) | |
1983 | { | |
1984 | result <<= 8; | |
1985 | scan++; | |
1986 | } | |
1987 | /* Create correct expression */ | |
5ac34ac3 | 1988 | exp->X_op = O_constant; |
40324362 | 1989 | exp->X_add_number = result; |
40324362 KR |
1990 | /* Fake it so that we can read the next char too */ |
1991 | if (input_line_pointer[0] != '\'' || | |
1992 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
1993 | { | |
1994 | input_line_pointer -= 2; | |
1995 | input_line_pointer[0] = ','; | |
1996 | input_line_pointer[1] = '\''; | |
1997 | } | |
1998 | else | |
1999 | input_line_pointer++; | |
2000 | } | |
2001 | else | |
2002 | expression (&exp); | |
2003 | } | |
2004 | ||
2005 | #endif /* MRI */ | |
2006 | \f | |
2007 | #ifdef REPEAT_CONS_EXPRESSIONS | |
2008 | ||
2009 | /* Parse a repeat expression for cons. This is used by the MIPS | |
2010 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
2011 | object file COUNT times. | |
2012 | ||
2013 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
2014 | ||
2015 | static void | |
2016 | parse_repeat_cons (exp, nbytes) | |
2017 | expressionS *exp; | |
2018 | unsigned int nbytes; | |
2019 | { | |
2020 | expressionS count; | |
40324362 KR |
2021 | register int i; |
2022 | ||
2023 | expression (exp); | |
2024 | ||
2025 | if (*input_line_pointer != ':') | |
2026 | { | |
2027 | /* No repeat count. */ | |
2028 | return; | |
2029 | } | |
2030 | ||
2031 | ++input_line_pointer; | |
5ac34ac3 ILT |
2032 | expression (&count); |
2033 | if (count.X_op != O_constant | |
40324362 KR |
2034 | || count.X_add_number <= 0) |
2035 | { | |
2036 | as_warn ("Unresolvable or nonpositive repeat count; using 1"); | |
2037 | return; | |
2038 | } | |
2039 | ||
2040 | /* The cons function is going to output this expression once. So we | |
2041 | output it count - 1 times. */ | |
2042 | for (i = count.X_add_number - 1; i > 0; i--) | |
2043 | emit_expr (exp, nbytes); | |
2044 | } | |
2045 | ||
2046 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
fecd2382 | 2047 | \f |
fecd2382 RP |
2048 | /* |
2049 | * float_cons() | |
2050 | * | |
2051 | * CONStruct some more frag chars of .floats .ffloats etc. | |
2052 | * Makes 0 or more new frags. | |
2053 | * If need_pass_2 == 1, no frags are emitted. | |
2054 | * This understands only floating literals, not expressions. Sorry. | |
2055 | * | |
2056 | * A floating constant is defined by atof_generic(), except it is preceded | |
2057 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
2058 | * reading, I decided to be incompatible. This always tries to give you | |
2059 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
2060 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
2061 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
2062 | * scanners you directed AS to use. | |
2063 | * | |
2064 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
2065 | * | |
2066 | */ | |
2067 | ||
ba71c54d KR |
2068 | void |
2069 | float_cons (float_type) | |
6efd877d | 2070 | /* Clobbers input_line-pointer, checks end-of-line. */ |
f8701a3f | 2071 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ |
fecd2382 | 2072 | { |
6efd877d | 2073 | register char *p; |
6efd877d KR |
2074 | int length; /* Number of chars in an object. */ |
2075 | register char *err; /* Error from scanning floating literal. */ | |
2076 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
f8701a3f | 2077 | |
6efd877d | 2078 | if (is_it_end_of_statement ()) |
f8701a3f | 2079 | { |
1e9cf565 ILT |
2080 | demand_empty_rest_of_line (); |
2081 | return; | |
f8701a3f | 2082 | } |
1e9cf565 ILT |
2083 | |
2084 | do | |
f8701a3f SC |
2085 | { |
2086 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
6efd877d | 2087 | SKIP_WHITESPACE (); |
1e9cf565 | 2088 | |
f8701a3f SC |
2089 | /* Skip any 0{letter} that may be present. Don't even check if the |
2090 | * letter is legal. Someone may invent a "z" format and this routine | |
2091 | * has no use for such information. Lusers beware: you get | |
2092 | * diagnostics if your input is ill-conditioned. | |
2093 | */ | |
6efd877d KR |
2094 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) |
2095 | input_line_pointer += 2; | |
f8701a3f SC |
2096 | |
2097 | err = md_atof (float_type, temp, &length); | |
6efd877d KR |
2098 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); |
2099 | know (length > 0); | |
80aab579 | 2100 | if (err) |
f8701a3f | 2101 | { |
6efd877d KR |
2102 | as_bad ("Bad floating literal: %s", err); |
2103 | ignore_rest_of_line (); | |
1e9cf565 | 2104 | return; |
f8701a3f | 2105 | } |
1e9cf565 ILT |
2106 | |
2107 | if (!need_pass_2) | |
f8701a3f | 2108 | { |
1e9cf565 ILT |
2109 | int count; |
2110 | ||
2111 | count = 1; | |
2112 | ||
2113 | #ifdef REPEAT_CONS_EXPRESSIONS | |
2114 | if (*input_line_pointer == ':') | |
2115 | { | |
1e9cf565 ILT |
2116 | expressionS count_exp; |
2117 | ||
2118 | ++input_line_pointer; | |
5ac34ac3 ILT |
2119 | expression (&count_exp); |
2120 | if (count_exp.X_op != O_constant | |
1e9cf565 ILT |
2121 | || count_exp.X_add_number <= 0) |
2122 | { | |
5ac34ac3 | 2123 | as_warn ("unresolvable or nonpositive repeat count; using 1"); |
1e9cf565 ILT |
2124 | } |
2125 | else | |
2126 | count = count_exp.X_add_number; | |
2127 | } | |
2128 | #endif | |
2129 | ||
2130 | while (--count >= 0) | |
a39116f1 | 2131 | { |
f8701a3f | 2132 | p = frag_more (length); |
604633ae | 2133 | memcpy (p, temp, (unsigned int) length); |
a39116f1 | 2134 | } |
542e1629 | 2135 | } |
1e9cf565 | 2136 | SKIP_WHITESPACE (); |
f8701a3f | 2137 | } |
1e9cf565 ILT |
2138 | while (*input_line_pointer++ == ','); |
2139 | ||
2140 | --input_line_pointer; /* Put terminator back into stream. */ | |
6efd877d | 2141 | demand_empty_rest_of_line (); |
f8701a3f | 2142 | } /* float_cons() */ |
fecd2382 RP |
2143 | \f |
2144 | /* | |
2145 | * stringer() | |
2146 | * | |
2147 | * We read 0 or more ',' seperated, double-quoted strings. | |
2148 | * | |
2149 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
2150 | */ | |
a39116f1 RP |
2151 | |
2152 | ||
6efd877d KR |
2153 | void |
2154 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
2155 | /* Checks end-of-line. */ | |
f8701a3f | 2156 | register int append_zero; /* 0: don't append '\0', else 1 */ |
fecd2382 | 2157 | { |
f8701a3f | 2158 | register unsigned int c; |
6efd877d | 2159 | |
f8701a3f SC |
2160 | /* |
2161 | * The following awkward logic is to parse ZERO or more strings, | |
2162 | * comma seperated. Recall a string expression includes spaces | |
2163 | * before the opening '\"' and spaces after the closing '\"'. | |
2164 | * We fake a leading ',' if there is (supposed to be) | |
2165 | * a 1st, expression. We keep demanding expressions for each | |
2166 | * ','. | |
2167 | */ | |
6efd877d KR |
2168 | if (is_it_end_of_statement ()) |
2169 | { | |
2170 | c = 0; /* Skip loop. */ | |
2171 | ++input_line_pointer; /* Compensate for end of loop. */ | |
2172 | } | |
f8701a3f | 2173 | else |
6efd877d KR |
2174 | { |
2175 | c = ','; /* Do loop. */ | |
2176 | } | |
2177 | while (c == ',' || c == '<' || c == '"') | |
2178 | { | |
2179 | SKIP_WHITESPACE (); | |
2180 | switch (*input_line_pointer) | |
2181 | { | |
2182 | case '\"': | |
2183 | ++input_line_pointer; /*->1st char of string. */ | |
2184 | while (is_a_char (c = next_char_of_string ())) | |
2185 | { | |
2186 | FRAG_APPEND_1_CHAR (c); | |
2187 | } | |
2188 | if (append_zero) | |
2189 | { | |
2190 | FRAG_APPEND_1_CHAR (0); | |
2191 | } | |
2192 | know (input_line_pointer[-1] == '\"'); | |
2193 | break; | |
2194 | case '<': | |
2195 | input_line_pointer++; | |
2196 | c = get_single_number (); | |
2197 | FRAG_APPEND_1_CHAR (c); | |
2198 | if (*input_line_pointer != '>') | |
2199 | { | |
2200 | as_bad ("Expected <nn>"); | |
2201 | } | |
2202 | input_line_pointer++; | |
2203 | break; | |
2204 | case ',': | |
2205 | input_line_pointer++; | |
2206 | break; | |
2207 | } | |
2208 | SKIP_WHITESPACE (); | |
2209 | c = *input_line_pointer; | |
f8701a3f | 2210 | } |
f8701a3f | 2211 | |
6efd877d KR |
2212 | demand_empty_rest_of_line (); |
2213 | } /* stringer() */ | |
fecd2382 | 2214 | \f |
6efd877d | 2215 | /* FIXME-SOMEDAY: I had trouble here on characters with the |
f8701a3f SC |
2216 | high bits set. We'll probably also have trouble with |
2217 | multibyte chars, wide chars, etc. Also be careful about | |
2218 | returning values bigger than 1 byte. xoxorich. */ | |
fecd2382 | 2219 | |
6efd877d KR |
2220 | unsigned int |
2221 | next_char_of_string () | |
2222 | { | |
2223 | register unsigned int c; | |
2224 | ||
2225 | c = *input_line_pointer++ & CHAR_MASK; | |
2226 | switch (c) | |
2227 | { | |
2228 | case '\"': | |
2229 | c = NOT_A_CHAR; | |
2230 | break; | |
2231 | ||
2232 | case '\\': | |
2233 | switch (c = *input_line_pointer++) | |
2234 | { | |
2235 | case 'b': | |
2236 | c = '\b'; | |
2237 | break; | |
2238 | ||
2239 | case 'f': | |
2240 | c = '\f'; | |
2241 | break; | |
2242 | ||
2243 | case 'n': | |
2244 | c = '\n'; | |
2245 | break; | |
2246 | ||
2247 | case 'r': | |
2248 | c = '\r'; | |
2249 | break; | |
2250 | ||
2251 | case 't': | |
2252 | c = '\t'; | |
2253 | break; | |
2254 | ||
fecd2382 | 2255 | #ifdef BACKSLASH_V |
6efd877d KR |
2256 | case 'v': |
2257 | c = '\013'; | |
2258 | break; | |
fecd2382 | 2259 | #endif |
6efd877d KR |
2260 | |
2261 | case '\\': | |
2262 | case '"': | |
2263 | break; /* As itself. */ | |
2264 | ||
2265 | case '0': | |
2266 | case '1': | |
2267 | case '2': | |
2268 | case '3': | |
2269 | case '4': | |
2270 | case '5': | |
2271 | case '6': | |
2272 | case '7': | |
2273 | case '8': | |
2274 | case '9': | |
2275 | { | |
2276 | long number; | |
2277 | ||
2278 | for (number = 0; isdigit (c); c = *input_line_pointer++) | |
2279 | { | |
2280 | number = number * 8 + c - '0'; | |
2281 | } | |
2282 | c = number & 0xff; | |
2283 | } | |
2284 | --input_line_pointer; | |
2285 | break; | |
2286 | ||
2287 | case '\n': | |
2288 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
2289 | as_warn ("Unterminated string: Newline inserted."); | |
2290 | c = '\n'; | |
2291 | break; | |
2292 | ||
2293 | default: | |
2294 | ||
fecd2382 | 2295 | #ifdef ONLY_STANDARD_ESCAPES |
6efd877d KR |
2296 | as_bad ("Bad escaped character in string, '?' assumed"); |
2297 | c = '?'; | |
fecd2382 | 2298 | #endif /* ONLY_STANDARD_ESCAPES */ |
6efd877d KR |
2299 | |
2300 | break; | |
2301 | } /* switch on escaped char */ | |
2302 | break; | |
2303 | ||
2304 | default: | |
2305 | break; | |
2306 | } /* switch on char */ | |
2307 | return (c); | |
2308 | } /* next_char_of_string() */ | |
fecd2382 RP |
2309 | \f |
2310 | static segT | |
f8701a3f | 2311 | get_segmented_expression (expP) |
6efd877d | 2312 | register expressionS *expP; |
fecd2382 | 2313 | { |
6efd877d | 2314 | register segT retval; |
f8701a3f | 2315 | |
9471a360 | 2316 | retval = expression (expP); |
5ac34ac3 ILT |
2317 | if (expP->X_op == O_illegal |
2318 | || expP->X_op == O_absent | |
2319 | || expP->X_op == O_big) | |
f8701a3f | 2320 | { |
5ac34ac3 ILT |
2321 | as_bad ("expected address expression; zero assumed"); |
2322 | expP->X_op = O_constant; | |
6efd877d | 2323 | expP->X_add_number = 0; |
5ac34ac3 | 2324 | retval = absolute_section; |
f8701a3f | 2325 | } |
5ac34ac3 | 2326 | return retval; |
fecd2382 RP |
2327 | } |
2328 | ||
6efd877d KR |
2329 | static segT |
2330 | get_known_segmented_expression (expP) | |
2331 | register expressionS *expP; | |
fecd2382 | 2332 | { |
6efd877d | 2333 | register segT retval; |
f8701a3f | 2334 | |
9471a360 | 2335 | if ((retval = get_segmented_expression (expP)) == undefined_section) |
f8701a3f | 2336 | { |
5ac34ac3 ILT |
2337 | /* There is no easy way to extract the undefined symbol from the |
2338 | expression. */ | |
2339 | if (expP->X_add_symbol != NULL | |
2340 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
2341 | as_warn ("symbol \"%s\" undefined; zero assumed", | |
2342 | S_GET_NAME (expP->X_add_symbol)); | |
f8701a3f | 2343 | else |
5ac34ac3 ILT |
2344 | as_warn ("some symbol undefined; zero assumed"); |
2345 | retval = absolute_section; | |
2346 | expP->X_op = O_constant; | |
6efd877d | 2347 | expP->X_add_number = 0; |
f8701a3f | 2348 | } |
5ac34ac3 | 2349 | know (retval == absolute_section || SEG_NORMAL (retval)); |
f8701a3f | 2350 | return (retval); |
fecd2382 RP |
2351 | } /* get_known_segmented_expression() */ |
2352 | ||
58d4951d | 2353 | offsetT |
f8701a3f | 2354 | get_absolute_expression () |
fecd2382 | 2355 | { |
6efd877d | 2356 | expressionS exp; |
f8701a3f | 2357 | |
5ac34ac3 ILT |
2358 | expression (&exp); |
2359 | if (exp.X_op != O_constant) | |
f8701a3f | 2360 | { |
5ac34ac3 ILT |
2361 | if (exp.X_op != O_absent) |
2362 | as_bad ("bad absolute expression; zero assumed"); | |
6efd877d | 2363 | exp.X_add_number = 0; |
f8701a3f | 2364 | } |
5ac34ac3 | 2365 | return exp.X_add_number; |
fecd2382 RP |
2366 | } |
2367 | ||
6efd877d KR |
2368 | char /* return terminator */ |
2369 | get_absolute_expression_and_terminator (val_pointer) | |
2370 | long *val_pointer; /* return value of expression */ | |
fecd2382 | 2371 | { |
58d4951d ILT |
2372 | /* FIXME: val_pointer should probably be offsetT *. */ |
2373 | *val_pointer = (long) get_absolute_expression (); | |
6efd877d | 2374 | return (*input_line_pointer++); |
fecd2382 RP |
2375 | } |
2376 | \f | |
2377 | /* | |
2378 | * demand_copy_C_string() | |
2379 | * | |
2380 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
2381 | * Give a warning if that happens. | |
2382 | */ | |
2383 | char * | |
f8701a3f | 2384 | demand_copy_C_string (len_pointer) |
6efd877d | 2385 | int *len_pointer; |
fecd2382 | 2386 | { |
6efd877d | 2387 | register char *s; |
f8701a3f | 2388 | |
6efd877d | 2389 | if ((s = demand_copy_string (len_pointer)) != 0) |
f8701a3f SC |
2390 | { |
2391 | register int len; | |
2392 | ||
6efd877d | 2393 | for (len = *len_pointer; |
f8701a3f SC |
2394 | len > 0; |
2395 | len--) | |
2396 | { | |
6efd877d | 2397 | if (*s == 0) |
fecd2382 | 2398 | { |
f8701a3f SC |
2399 | s = 0; |
2400 | len = 1; | |
6efd877d KR |
2401 | *len_pointer = 0; |
2402 | as_bad ("This string may not contain \'\\0\'"); | |
fecd2382 | 2403 | } |
f8701a3f SC |
2404 | } |
2405 | } | |
2406 | return (s); | |
fecd2382 RP |
2407 | } |
2408 | \f | |
2409 | /* | |
2410 | * demand_copy_string() | |
2411 | * | |
2412 | * Demand string, but return a safe (=private) copy of the string. | |
2413 | * Return NULL if we can't read a string here. | |
2414 | */ | |
6efd877d KR |
2415 | static char * |
2416 | demand_copy_string (lenP) | |
2417 | int *lenP; | |
fecd2382 | 2418 | { |
6efd877d KR |
2419 | register unsigned int c; |
2420 | register int len; | |
2421 | char *retval; | |
2422 | ||
2423 | len = 0; | |
2424 | SKIP_WHITESPACE (); | |
2425 | if (*input_line_pointer == '\"') | |
2426 | { | |
2427 | input_line_pointer++; /* Skip opening quote. */ | |
2428 | ||
2429 | while (is_a_char (c = next_char_of_string ())) | |
2430 | { | |
2431 | obstack_1grow (¬es, c); | |
2432 | len++; | |
fecd2382 | 2433 | } |
6efd877d KR |
2434 | /* JF this next line is so demand_copy_C_string will return a null |
2435 | termanated string. */ | |
2436 | obstack_1grow (¬es, '\0'); | |
2437 | retval = obstack_finish (¬es); | |
2438 | } | |
2439 | else | |
2440 | { | |
2441 | as_warn ("Missing string"); | |
2442 | retval = NULL; | |
2443 | ignore_rest_of_line (); | |
2444 | } | |
2445 | *lenP = len; | |
2446 | return (retval); | |
2447 | } /* demand_copy_string() */ | |
fecd2382 RP |
2448 | \f |
2449 | /* | |
2450 | * is_it_end_of_statement() | |
2451 | * | |
2452 | * In: Input_line_pointer->next character. | |
2453 | * | |
2454 | * Do: Skip input_line_pointer over all whitespace. | |
2455 | * | |
2456 | * Out: 1 if input_line_pointer->end-of-line. | |
f8701a3f | 2457 | */ |
6efd877d KR |
2458 | int |
2459 | is_it_end_of_statement () | |
2460 | { | |
2461 | SKIP_WHITESPACE (); | |
58d4951d | 2462 | return (is_end_of_line[(unsigned char) *input_line_pointer]); |
6efd877d | 2463 | } /* is_it_end_of_statement() */ |
fecd2382 | 2464 | |
6efd877d KR |
2465 | void |
2466 | equals (sym_name) | |
2467 | char *sym_name; | |
fecd2382 | 2468 | { |
6efd877d | 2469 | register symbolS *symbolP; /* symbol we are working with */ |
f8701a3f SC |
2470 | |
2471 | input_line_pointer++; | |
6efd877d | 2472 | if (*input_line_pointer == '=') |
f8701a3f SC |
2473 | input_line_pointer++; |
2474 | ||
6efd877d | 2475 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') |
f8701a3f SC |
2476 | input_line_pointer++; |
2477 | ||
6efd877d KR |
2478 | if (sym_name[0] == '.' && sym_name[1] == '\0') |
2479 | { | |
2480 | /* Turn '. = mumble' into a .org mumble */ | |
2481 | register segT segment; | |
2482 | expressionS exp; | |
2483 | register char *p; | |
f8701a3f | 2484 | |
6efd877d KR |
2485 | segment = get_known_segmented_expression (&exp); |
2486 | if (!need_pass_2) | |
2487 | { | |
9471a360 | 2488 | if (segment != now_seg && segment != absolute_section) |
6efd877d KR |
2489 | as_warn ("Illegal segment \"%s\". Segment \"%s\" assumed.", |
2490 | segment_name (segment), | |
2491 | segment_name (now_seg)); | |
2492 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp.X_add_symbol, | |
2493 | exp.X_add_number, (char *) 0); | |
2494 | *p = 0; | |
2495 | } /* if (ok to make frag) */ | |
2496 | } | |
2497 | else | |
2498 | { | |
2499 | symbolP = symbol_find_or_make (sym_name); | |
2500 | pseudo_set (symbolP); | |
2501 | } | |
2502 | } /* equals() */ | |
fecd2382 RP |
2503 | |
2504 | /* .include -- include a file at this point. */ | |
2505 | ||
2506 | /* ARGSUSED */ | |
6efd877d KR |
2507 | void |
2508 | s_include (arg) | |
2509 | int arg; | |
fecd2382 | 2510 | { |
f8701a3f SC |
2511 | char *newbuf; |
2512 | char *filename; | |
2513 | int i; | |
2514 | FILE *try; | |
2515 | char *path; | |
2516 | ||
6efd877d KR |
2517 | filename = demand_copy_string (&i); |
2518 | demand_empty_rest_of_line (); | |
604633ae | 2519 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); |
6efd877d KR |
2520 | for (i = 0; i < include_dir_count; i++) |
2521 | { | |
2522 | strcpy (path, include_dirs[i]); | |
2523 | strcat (path, "/"); | |
2524 | strcat (path, filename); | |
2525 | if (0 != (try = fopen (path, "r"))) | |
2526 | { | |
2527 | fclose (try); | |
2528 | goto gotit; | |
2529 | } | |
2530 | } | |
2531 | free (path); | |
f8701a3f SC |
2532 | path = filename; |
2533 | gotit: | |
2534 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
2535 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
2536 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
6efd877d | 2537 | } /* s_include() */ |
fecd2382 | 2538 | |
6efd877d KR |
2539 | void |
2540 | add_include_dir (path) | |
2541 | char *path; | |
fecd2382 | 2542 | { |
f8701a3f SC |
2543 | int i; |
2544 | ||
2545 | if (include_dir_count == 0) | |
2546 | { | |
6efd877d | 2547 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); |
f8701a3f SC |
2548 | include_dirs[0] = "."; /* Current dir */ |
2549 | include_dir_count = 2; | |
2550 | } | |
2551 | else | |
2552 | { | |
2553 | include_dir_count++; | |
6efd877d KR |
2554 | include_dirs = (char **) realloc (include_dirs, |
2555 | include_dir_count * sizeof (*include_dirs)); | |
f8701a3f SC |
2556 | } |
2557 | ||
6efd877d | 2558 | include_dirs[include_dir_count - 1] = path; /* New one */ |
f8701a3f | 2559 | |
6efd877d KR |
2560 | i = strlen (path); |
2561 | if (i > include_dir_maxlen) | |
2562 | include_dir_maxlen = i; | |
2563 | } /* add_include_dir() */ | |
fecd2382 | 2564 | |
6efd877d KR |
2565 | void |
2566 | s_ignore (arg) | |
2567 | int arg; | |
fecd2382 | 2568 | { |
58d4951d | 2569 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
2570 | { |
2571 | ++input_line_pointer; | |
2572 | } | |
2573 | ++input_line_pointer; | |
fecd2382 | 2574 | |
6efd877d KR |
2575 | return; |
2576 | } /* s_ignore() */ | |
80aab579 | 2577 | \f |
4064305e SS |
2578 | /* |
2579 | * Handle .stabX directives, which used to be open-coded. | |
2580 | * So much creeping featurism overloaded the semantics that we decided | |
2581 | * to put all .stabX thinking in one place. Here. | |
2582 | * | |
2583 | * We try to make any .stabX directive legal. Other people's AS will often | |
2584 | * do assembly-time consistency checks: eg assigning meaning to n_type bits | |
2585 | * and "protecting" you from setting them to certain values. (They also zero | |
2586 | * certain bits before emitting symbols. Tut tut.) | |
2587 | * | |
2588 | * If an expression is not absolute we either gripe or use the relocation | |
2589 | * information. Other people's assemblers silently forget information they | |
2590 | * don't need and invent information they need that you didn't supply. | |
2591 | */ | |
2592 | ||
4064305e SS |
2593 | /* |
2594 | * Build a string dictionary entry for a .stabX symbol. | |
2595 | * The symbol is added to the .<secname>str section. | |
2596 | */ | |
2597 | ||
58d4951d ILT |
2598 | #ifdef SEPARATE_STAB_SECTIONS |
2599 | ||
80aab579 | 2600 | unsigned int |
4064305e | 2601 | get_stab_string_offset (string, secname) |
80aab579 ILT |
2602 | const char *string; |
2603 | const char *secname; | |
4064305e | 2604 | { |
4064305e | 2605 | unsigned int length; |
80aab579 ILT |
2606 | unsigned int retval; |
2607 | ||
2608 | retval = 0; | |
4064305e | 2609 | length = strlen (string); |
4064305e SS |
2610 | if (length > 0) |
2611 | { /* Ordinary case. */ | |
80aab579 ILT |
2612 | segT save_seg; |
2613 | subsegT save_subseg; | |
2614 | char *newsecname; | |
2615 | segT seg; | |
2616 | int aligned; | |
2617 | char *p; | |
2618 | ||
4064305e SS |
2619 | save_seg = now_seg; |
2620 | save_subseg = now_subseg; | |
2621 | ||
80aab579 ILT |
2622 | /* Create the stab string section. */ |
2623 | newsecname = xmalloc ((unsigned long) (strlen (secname) + 4)); | |
2624 | strcpy (newsecname, secname); | |
2625 | strcat (newsecname, "str"); | |
2626 | ||
2627 | seg = subseg_new (newsecname, 0); | |
2628 | ||
2629 | retval = seg_info (seg)->stabu.stab_string_size; | |
2630 | if (retval > 0) | |
2631 | free (newsecname); | |
2632 | else | |
2633 | { | |
2634 | /* Make sure the first string is empty. */ | |
2635 | p = frag_more (1); | |
2636 | *p = 0; | |
2637 | retval = seg_info (seg)->stabu.stab_string_size = 1; | |
4064305e | 2638 | #ifdef BFD_ASSEMBLER |
80aab579 | 2639 | bfd_set_section_flags (stdoutput, seg, SEC_READONLY); |
4064305e | 2640 | #else |
80aab579 | 2641 | free (newsecname); |
4064305e | 2642 | #endif |
4064305e | 2643 | } |
80aab579 ILT |
2644 | |
2645 | p = frag_more (length + 1); | |
2646 | strcpy (p, string); | |
2647 | ||
2648 | seg_info (seg)->stabu.stab_string_size += length + 1; | |
2649 | ||
abdd08c9 | 2650 | subseg_set (save_seg, save_subseg); |
4064305e | 2651 | } |
80aab579 ILT |
2652 | |
2653 | return retval; | |
4064305e SS |
2654 | } |
2655 | ||
58d4951d ILT |
2656 | #endif /* SEPARATE_STAB_SECTIONS */ |
2657 | ||
4064305e SS |
2658 | /* This can handle different kinds of stabs (s,n,d) and different |
2659 | kinds of stab sections. */ | |
2660 | ||
2661 | static void | |
2662 | s_stab_generic (what, secname) | |
2663 | int what; | |
2664 | char *secname; | |
2665 | { | |
4064305e | 2666 | long longint; |
80aab579 ILT |
2667 | char *string; |
2668 | int type; | |
2669 | int other; | |
2670 | int desc; | |
2671 | ||
2672 | /* The general format is: | |
2673 | .stabs "STRING",TYPE,OTHER,DESC,VALUE | |
2674 | .stabn TYPE,OTHER,DESC,VALUE | |
2675 | .stabd TYPE,OTHER,DESC | |
2676 | At this point input_line_pointer points after the pseudo-op and | |
2677 | any trailing whitespace. The argument what is one of 's', 'n' or | |
2678 | 'd' indicating which type of .stab this is. */ | |
2679 | ||
2680 | if (what != 's') | |
2681 | string = ""; | |
2682 | else | |
4064305e | 2683 | { |
80aab579 | 2684 | int length; |
4064305e | 2685 | |
4064305e SS |
2686 | string = demand_copy_C_string (&length); |
2687 | SKIP_WHITESPACE (); | |
2688 | if (*input_line_pointer == ',') | |
2689 | input_line_pointer++; | |
2690 | else | |
2691 | { | |
80aab579 ILT |
2692 | as_warn (".stabs: Missing comma"); |
2693 | ignore_rest_of_line (); | |
2694 | return; | |
4064305e SS |
2695 | } |
2696 | } | |
4064305e | 2697 | |
80aab579 | 2698 | if (get_absolute_expression_and_terminator (&longint) != ',') |
4064305e | 2699 | { |
80aab579 ILT |
2700 | as_warn (".stab%c: Missing comma", what); |
2701 | ignore_rest_of_line (); | |
2702 | return; | |
4064305e | 2703 | } |
80aab579 | 2704 | type = longint; |
4064305e | 2705 | |
80aab579 | 2706 | if (get_absolute_expression_and_terminator (&longint) != ',') |
4064305e | 2707 | { |
80aab579 ILT |
2708 | as_warn (".stab%c: Missing comma", what); |
2709 | ignore_rest_of_line (); | |
2710 | return; | |
4064305e | 2711 | } |
80aab579 | 2712 | other = longint; |
4064305e | 2713 | |
80aab579 ILT |
2714 | desc = get_absolute_expression (); |
2715 | if (what == 's' || what == 'n') | |
4064305e | 2716 | { |
80aab579 | 2717 | if (*input_line_pointer != ',') |
4064305e | 2718 | { |
80aab579 ILT |
2719 | as_warn (".stab%c: Missing comma", what); |
2720 | ignore_rest_of_line (); | |
2721 | return; | |
4064305e | 2722 | } |
80aab579 ILT |
2723 | input_line_pointer++; |
2724 | SKIP_WHITESPACE (); | |
4064305e SS |
2725 | } |
2726 | ||
80aab579 ILT |
2727 | /* We have not gathered the type, other, and desc information. For |
2728 | .stabs or .stabn, input_line_pointer is now pointing at the | |
2729 | value. */ | |
4064305e SS |
2730 | |
2731 | #ifdef SEPARATE_STAB_SECTIONS | |
80aab579 ILT |
2732 | /* Output the stab information in a separate section. This is used |
2733 | at least for COFF and ELF. */ | |
58d4951d | 2734 | { |
80aab579 ILT |
2735 | segT saved_seg = now_seg; |
2736 | subsegT saved_subseg = now_subseg; | |
2737 | fragS *saved_frag = frag_now; | |
2738 | valueT dot; | |
2739 | segT seg; | |
2740 | unsigned int stroff; | |
2741 | char *p; | |
2742 | ||
2743 | dot = frag_now_fix (); | |
2744 | ||
2745 | seg = subseg_new (secname, 0); | |
2746 | ||
2747 | if (! seg_info (seg)->hadone) | |
2748 | { | |
2749 | #ifdef BFD_ASSEMBLER | |
2750 | bfd_set_section_flags (stdoutput, seg, SEC_READONLY | SEC_RELOC); | |
2751 | #endif | |
2752 | #ifdef INIT_STAB_SECTION | |
2753 | INIT_STAB_SECTION (seg); | |
4064305e | 2754 | #endif |
80aab579 ILT |
2755 | seg_info (seg)->hadone = 1; |
2756 | } | |
4064305e | 2757 | |
80aab579 ILT |
2758 | stroff = get_stab_string_offset (string, secname); |
2759 | ||
2760 | /* At least for now, stabs in a special stab section are always | |
2761 | output as 12 byte blocks of information. */ | |
2762 | p = frag_more (8); | |
2763 | md_number_to_chars (p, (valueT) stroff, 4); | |
2764 | md_number_to_chars (p + 4, (valueT) type, 1); | |
2765 | md_number_to_chars (p + 5, (valueT) other, 1); | |
2766 | md_number_to_chars (p + 6, (valueT) desc, 2); | |
2767 | ||
2768 | if (what == 's' || what == 'n') | |
2769 | { | |
2770 | /* Pick up the value from the input line. */ | |
2771 | cons (4); | |
2772 | input_line_pointer--; | |
2773 | } | |
2774 | else | |
2775 | { | |
2776 | const char *fake; | |
2777 | symbolS *symbol; | |
2778 | expressionS exp; | |
2779 | ||
2780 | /* Arrange for a value representing the current location. */ | |
2781 | #ifdef DOT_LABEL_PREFIX | |
2782 | fake = ".L0\001"; | |
4064305e | 2783 | #else |
80aab579 | 2784 | fake = "L0\001"; |
4064305e | 2785 | #endif |
80aab579 | 2786 | symbol = symbol_new (fake, saved_seg, dot, saved_frag); |
4064305e | 2787 | |
80aab579 ILT |
2788 | exp.X_op = O_symbol; |
2789 | exp.X_add_symbol = symbol; | |
2790 | exp.X_add_number = 0; | |
2791 | ||
2792 | emit_expr (&exp, 4); | |
2793 | } | |
2794 | ||
2795 | #ifdef OBJ_PROCESS_STAB | |
2796 | OBJ_PROCESS_STAB (seg, string, stroff, type, other, desc); | |
4064305e SS |
2797 | #endif |
2798 | ||
80aab579 ILT |
2799 | subseg_set (saved_seg, saved_subseg); |
2800 | } | |
2801 | #else /* ! SEPARATE_STAB_SECTIONS */ | |
2802 | #ifdef OBJ_PROCESS_STAB | |
2803 | OBJ_PROCESS_STAB (what, string, type, other, desc); | |
2804 | #else | |
2805 | /* Put the stab information in the symbol table. */ | |
2806 | { | |
2807 | symbolS *symbol; | |
2808 | ||
2809 | symbol = symbol_new (string, undefined_section, 0, | |
2810 | (struct frag *) NULL); | |
2811 | if (what == 's' || what == 'n') | |
2812 | { | |
2813 | /* Pick up the value from the input line. */ | |
2814 | symbol->sy_frag = &zero_address_frag; | |
2815 | pseudo_set (symbol); | |
2816 | } | |
2817 | else | |
4064305e | 2818 | { |
80aab579 ILT |
2819 | /* .stabd sets the name to NULL. Why? */ |
2820 | S_SET_NAME (symbol, NULL); | |
2821 | symbol->sy_frag = frag_now; | |
2822 | S_SET_VALUE (symbol, (valueT) frag_now_fix ()); | |
4064305e | 2823 | } |
4064305e | 2824 | |
80aab579 ILT |
2825 | S_SET_TYPE (symbol, type); |
2826 | S_SET_OTHER (symbol, other); | |
2827 | S_SET_DESC (symbol, desc); | |
2828 | } | |
2829 | #endif /* ! OBJ_PROCESS_STAB */ | |
2830 | #endif /* ! SEPARATE_STAB_SECTIONS */ | |
2831 | ||
2832 | #ifndef NO_LISTING | |
2833 | if (listing) | |
2834 | { | |
2835 | switch (type) | |
2836 | { | |
2837 | case N_SLINE: | |
2838 | listing_source_line ((unsigned int) desc); | |
2839 | break; | |
2840 | case N_SO: | |
2841 | case N_SOL: | |
2842 | listing_source_file (string); | |
2843 | break; | |
2844 | } | |
2845 | } | |
2846 | #endif /* ! NO_LISTING */ | |
4064305e SS |
2847 | |
2848 | demand_empty_rest_of_line (); | |
2849 | } | |
2850 | ||
2851 | /* Regular stab directive. */ | |
2852 | ||
2853 | void | |
2854 | s_stab (what) | |
2855 | int what; | |
2856 | { | |
2857 | s_stab_generic (what, ".stab"); | |
2858 | } | |
2859 | ||
2860 | /* "Extended stabs", used in Solaris only now. */ | |
2861 | ||
2862 | void | |
2863 | s_xstab (what) | |
2864 | int what; | |
2865 | { | |
2866 | int length; | |
2867 | char *secname; | |
2868 | ||
2869 | secname = demand_copy_C_string (&length); | |
2870 | SKIP_WHITESPACE (); | |
2871 | if (*input_line_pointer == ',') | |
2872 | input_line_pointer++; | |
2873 | else | |
2874 | { | |
2875 | as_bad ("comma missing in .xstabs"); | |
2876 | ignore_rest_of_line (); | |
2877 | return; | |
2878 | } | |
2879 | s_stab_generic (what, secname); | |
2880 | } | |
2881 | ||
604633ae ILT |
2882 | #ifdef S_SET_DESC |
2883 | ||
4064305e SS |
2884 | /* Frob invented at RMS' request. Set the n_desc of a symbol. */ |
2885 | ||
2886 | void | |
604633ae ILT |
2887 | s_desc (ignore) |
2888 | int ignore; | |
4064305e SS |
2889 | { |
2890 | char *name; | |
2891 | char c; | |
2892 | char *p; | |
2893 | symbolS *symbolP; | |
2894 | int temp; | |
2895 | ||
2896 | name = input_line_pointer; | |
2897 | c = get_symbol_end (); | |
2898 | p = input_line_pointer; | |
2899 | *p = c; | |
2900 | SKIP_WHITESPACE (); | |
2901 | if (*input_line_pointer != ',') | |
2902 | { | |
2903 | *p = 0; | |
2904 | as_bad ("Expected comma after name \"%s\"", name); | |
2905 | *p = c; | |
2906 | ignore_rest_of_line (); | |
2907 | } | |
2908 | else | |
2909 | { | |
2910 | input_line_pointer++; | |
2911 | temp = get_absolute_expression (); | |
2912 | *p = 0; | |
2913 | symbolP = symbol_find_or_make (name); | |
2914 | *p = c; | |
2915 | S_SET_DESC (symbolP, temp); | |
2916 | } | |
2917 | demand_empty_rest_of_line (); | |
2918 | } /* s_desc() */ | |
2919 | ||
604633ae ILT |
2920 | #endif /* defined (S_SET_DESC) */ |
2921 | ||
fecd2382 | 2922 | /* end of read.c */ |