Commit | Line | Data |
---|---|---|
252b5132 RH |
1 | /* read.c - read a source file - |
2 | Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 1999 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | #if 0 | |
23 | #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will | |
24 | change this a bit. But then, GNU isn't | |
25 | spozed to run on your machine anyway. | |
26 | (RMS is so shortsighted sometimes.) | |
27 | */ | |
28 | #else | |
29 | #define MASK_CHAR ((int)(unsigned char)-1) | |
30 | #endif | |
31 | ||
32 | ||
33 | /* This is the largest known floating point format (for now). It will | |
34 | grow when we do 4361 style flonums. */ | |
35 | ||
36 | #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) | |
37 | ||
38 | /* Routines that read assembler source text to build spagetti in memory. | |
39 | Another group of these functions is in the expr.c module. */ | |
40 | ||
41 | /* for isdigit() */ | |
42 | #include <ctype.h> | |
43 | ||
44 | #include "as.h" | |
45 | #include "subsegs.h" | |
46 | #include "sb.h" | |
47 | #include "macro.h" | |
48 | #include "obstack.h" | |
49 | #include "listing.h" | |
50 | #include "ecoff.h" | |
51 | ||
52 | #ifndef TC_START_LABEL | |
53 | #define TC_START_LABEL(x,y) (x==':') | |
54 | #endif | |
55 | ||
56 | /* The NOP_OPCODE is for the alignment fill value. | |
57 | * fill it a nop instruction so that the disassembler does not choke | |
58 | * on it | |
59 | */ | |
60 | #ifndef NOP_OPCODE | |
61 | #define NOP_OPCODE 0x00 | |
62 | #endif | |
63 | ||
64 | char *input_line_pointer; /*->next char of source file to parse. */ | |
65 | ||
66 | #if BITS_PER_CHAR != 8 | |
67 | /* The following table is indexed by[(char)] and will break if | |
68 | a char does not have exactly 256 states (hopefully 0:255!)! */ | |
69 | die horribly; | |
70 | #endif | |
71 | ||
72 | #ifndef LEX_AT | |
73 | /* The m88k unfortunately uses @ as a label beginner. */ | |
74 | #define LEX_AT 0 | |
75 | #endif | |
76 | ||
77 | #ifndef LEX_BR | |
78 | /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ | |
79 | #define LEX_BR 0 | |
80 | #endif | |
81 | ||
82 | #ifndef LEX_PCT | |
83 | /* The Delta 68k assembler permits % inside label names. */ | |
84 | #define LEX_PCT 0 | |
85 | #endif | |
86 | ||
87 | #ifndef LEX_QM | |
88 | /* The PowerPC Windows NT assemblers permits ? inside label names. */ | |
89 | #define LEX_QM 0 | |
90 | #endif | |
91 | ||
92 | #ifndef LEX_DOLLAR | |
93 | /* The a29k assembler does not permits labels to start with $. */ | |
94 | #define LEX_DOLLAR 3 | |
95 | #endif | |
96 | ||
97 | #ifndef LEX_TILDE | |
98 | /* The Delta 68k assembler permits ~ at start of label names. */ | |
99 | #define LEX_TILDE 0 | |
100 | #endif | |
101 | ||
102 | /* used by is_... macros. our ctype[] */ | |
103 | char lex_type[256] = | |
104 | { | |
105 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
106 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
107 | 0, 0, 0, 0, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ | |
108 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */ | |
109 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ | |
110 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ | |
111 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ | |
112 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */ | |
113 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
114 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
115 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
116 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
117 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
118 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
119 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
120 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 | |
121 | }; | |
122 | ||
123 | ||
124 | /* | |
125 | * In: a character. | |
126 | * Out: 1 if this character ends a line. | |
127 | */ | |
128 | #define Z_ (0) | |
129 | char is_end_of_line[256] = | |
130 | { | |
131 | #ifdef CR_EOL | |
132 | 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, 99, Z_, Z_, /* @abcdefghijklmno */ | |
133 | #else | |
134 | 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, Z_, Z_, Z_, /* @abcdefghijklmno */ | |
135 | #endif | |
136 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
137 | #ifdef TC_HPPA | |
138 | Z_,99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* _!"#$%&'()*+,-./ */ | |
139 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */ | |
140 | #else | |
141 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
142 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */ | |
143 | #endif | |
144 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
145 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
146 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
147 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
148 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
149 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
150 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
151 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
152 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
153 | }; | |
154 | #undef Z_ | |
155 | ||
156 | /* Functions private to this file. */ | |
157 | ||
158 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
159 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
160 | ||
161 | /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the | |
162 | tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */ | |
163 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; | |
164 | ||
165 | static char *old_buffer; /* JF a hack */ | |
166 | static char *old_input; | |
167 | static char *old_limit; | |
168 | ||
169 | /* Variables for handling include file directory table. */ | |
170 | ||
171 | char **include_dirs; /* Table of pointers to directories to | |
172 | search for .include's */ | |
173 | int include_dir_count; /* How many are in the table */ | |
174 | int include_dir_maxlen = 1;/* Length of longest in table */ | |
175 | ||
176 | #ifndef WORKING_DOT_WORD | |
177 | struct broken_word *broken_words; | |
178 | int new_broken_words; | |
179 | #endif | |
180 | ||
181 | /* The current offset into the absolute section. We don't try to | |
182 | build frags in the absolute section, since no data can be stored | |
183 | there. We just keep track of the current offset. */ | |
184 | addressT abs_section_offset; | |
185 | ||
186 | /* If this line had an MRI style label, it is stored in this variable. | |
187 | This is used by some of the MRI pseudo-ops. */ | |
188 | symbolS *line_label; | |
189 | ||
190 | /* This global variable is used to support MRI common sections. We | |
191 | translate such sections into a common symbol. This variable is | |
192 | non-NULL when we are in an MRI common section. */ | |
193 | symbolS *mri_common_symbol; | |
194 | ||
195 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we | |
196 | need to align to an even byte boundary unless the next pseudo-op is | |
197 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment | |
198 | may be needed. */ | |
199 | static int mri_pending_align; | |
200 | ||
201 | #ifndef NO_LISTING | |
202 | #ifdef OBJ_ELF | |
203 | /* This variable is set to be non-zero if the next string we see might | |
204 | be the name of the source file in DWARF debugging information. See | |
205 | the comment in emit_expr for the format we look for. */ | |
206 | static int dwarf_file_string; | |
207 | #endif | |
208 | #endif | |
209 | ||
210 | static void cons_worker PARAMS ((int, int)); | |
211 | static int scrub_from_string PARAMS ((char **)); | |
212 | static void do_align PARAMS ((int, char *, int, int)); | |
213 | static void s_align PARAMS ((int, int)); | |
214 | static int hex_float PARAMS ((int, char *)); | |
215 | static void do_org PARAMS ((segT, expressionS *, int)); | |
216 | char *demand_copy_string PARAMS ((int *lenP)); | |
217 | static segT get_segmented_expression PARAMS ((expressionS *expP)); | |
218 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); | |
219 | static void pobegin PARAMS ((void)); | |
220 | static int get_line_sb PARAMS ((sb *)); | |
221 | static void generate_file_debug PARAMS ((void)); | |
222 | \f | |
223 | ||
224 | void | |
225 | read_begin () | |
226 | { | |
227 | const char *p; | |
228 | ||
229 | pobegin (); | |
230 | obj_read_begin_hook (); | |
231 | ||
232 | /* Something close -- but not too close -- to a multiple of 1024. | |
233 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
234 | obstack_begin (¬es, chunksize); | |
235 | obstack_begin (&cond_obstack, chunksize); | |
236 | ||
237 | /* Use machine dependent syntax */ | |
238 | for (p = line_separator_chars; *p; p++) | |
239 | is_end_of_line[(unsigned char) *p] = 1; | |
240 | /* Use more. FIXME-SOMEDAY. */ | |
241 | ||
242 | if (flag_mri) | |
243 | lex_type['?'] = 3; | |
244 | } | |
245 | \f | |
246 | /* set up pseudo-op tables */ | |
247 | ||
248 | static struct hash_control *po_hash; | |
249 | ||
250 | static const pseudo_typeS potable[] = | |
251 | { | |
252 | {"abort", s_abort, 0}, | |
253 | {"align", s_align_ptwo, 0}, | |
254 | {"ascii", stringer, 0}, | |
255 | {"asciz", stringer, 1}, | |
256 | {"balign", s_align_bytes, 0}, | |
257 | {"balignw", s_align_bytes, -2}, | |
258 | {"balignl", s_align_bytes, -4}, | |
259 | /* block */ | |
260 | {"byte", cons, 1}, | |
261 | {"comm", s_comm, 0}, | |
262 | {"common", s_mri_common, 0}, | |
263 | {"common.s", s_mri_common, 1}, | |
264 | {"data", s_data, 0}, | |
265 | {"dc", cons, 2}, | |
266 | {"dc.b", cons, 1}, | |
267 | {"dc.d", float_cons, 'd'}, | |
268 | {"dc.l", cons, 4}, | |
269 | {"dc.s", float_cons, 'f'}, | |
270 | {"dc.w", cons, 2}, | |
271 | {"dc.x", float_cons, 'x'}, | |
272 | {"dcb", s_space, 2}, | |
273 | {"dcb.b", s_space, 1}, | |
274 | {"dcb.d", s_float_space, 'd'}, | |
275 | {"dcb.l", s_space, 4}, | |
276 | {"dcb.s", s_float_space, 'f'}, | |
277 | {"dcb.w", s_space, 2}, | |
278 | {"dcb.x", s_float_space, 'x'}, | |
279 | {"ds", s_space, 2}, | |
280 | {"ds.b", s_space, 1}, | |
281 | {"ds.d", s_space, 8}, | |
282 | {"ds.l", s_space, 4}, | |
283 | {"ds.p", s_space, 12}, | |
284 | {"ds.s", s_space, 4}, | |
285 | {"ds.w", s_space, 2}, | |
286 | {"ds.x", s_space, 12}, | |
287 | {"debug", s_ignore, 0}, | |
288 | #ifdef S_SET_DESC | |
289 | {"desc", s_desc, 0}, | |
290 | #endif | |
291 | /* dim */ | |
292 | {"double", float_cons, 'd'}, | |
293 | /* dsect */ | |
294 | {"eject", listing_eject, 0}, /* Formfeed listing */ | |
295 | {"else", s_else, 0}, | |
296 | {"elsec", s_else, 0}, | |
297 | {"end", s_end, 0}, | |
298 | {"endc", s_endif, 0}, | |
299 | {"endfunc", s_func, 1}, | |
300 | {"endif", s_endif, 0}, | |
301 | /* endef */ | |
302 | {"equ", s_set, 0}, | |
303 | {"equiv", s_set, 1}, | |
304 | {"err", s_err, 0}, | |
305 | {"exitm", s_mexit, 0}, | |
306 | /* extend */ | |
307 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ | |
308 | {"appfile", s_app_file, 1}, | |
309 | {"appline", s_app_line, 0}, | |
310 | {"fail", s_fail, 0}, | |
311 | {"file", s_app_file, 0}, | |
312 | {"fill", s_fill, 0}, | |
313 | {"float", float_cons, 'f'}, | |
314 | {"format", s_ignore, 0}, | |
315 | {"func", s_func, 0}, | |
316 | {"global", s_globl, 0}, | |
317 | {"globl", s_globl, 0}, | |
318 | {"hword", cons, 2}, | |
319 | {"if", s_if, (int) O_ne}, | |
320 | {"ifc", s_ifc, 0}, | |
321 | {"ifdef", s_ifdef, 0}, | |
322 | {"ifeq", s_if, (int) O_eq}, | |
323 | {"ifeqs", s_ifeqs, 0}, | |
324 | {"ifge", s_if, (int) O_ge}, | |
325 | {"ifgt", s_if, (int) O_gt}, | |
326 | {"ifle", s_if, (int) O_le}, | |
327 | {"iflt", s_if, (int) O_lt}, | |
328 | {"ifnc", s_ifc, 1}, | |
329 | {"ifndef", s_ifdef, 1}, | |
330 | {"ifne", s_if, (int) O_ne}, | |
331 | {"ifnes", s_ifeqs, 1}, | |
332 | {"ifnotdef", s_ifdef, 1}, | |
333 | {"include", s_include, 0}, | |
334 | {"int", cons, 4}, | |
335 | {"irp", s_irp, 0}, | |
336 | {"irep", s_irp, 0}, | |
337 | {"irpc", s_irp, 1}, | |
338 | {"irepc", s_irp, 1}, | |
339 | {"lcomm", s_lcomm, 0}, | |
340 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
341 | {"linkonce", s_linkonce, 0}, | |
342 | {"list", listing_list, 1}, /* Turn listing on */ | |
343 | {"llen", listing_psize, 1}, | |
344 | {"long", cons, 4}, | |
345 | {"lsym", s_lsym, 0}, | |
346 | {"macro", s_macro, 0}, | |
347 | {"mexit", s_mexit, 0}, | |
348 | {"mri", s_mri, 0}, | |
349 | {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */ | |
350 | {"name", s_ignore, 0}, | |
351 | {"noformat", s_ignore, 0}, | |
352 | {"nolist", listing_list, 0}, /* Turn listing off */ | |
353 | {"nopage", listing_nopage, 0}, | |
354 | {"octa", cons, 16}, | |
355 | {"offset", s_struct, 0}, | |
356 | {"org", s_org, 0}, | |
357 | {"p2align", s_align_ptwo, 0}, | |
358 | {"p2alignw", s_align_ptwo, -2}, | |
359 | {"p2alignl", s_align_ptwo, -4}, | |
360 | {"page", listing_eject, 0}, | |
361 | {"plen", listing_psize, 0}, | |
362 | {"print", s_print, 0}, | |
363 | {"psize", listing_psize, 0}, /* set paper size */ | |
364 | {"purgem", s_purgem, 0}, | |
365 | {"quad", cons, 8}, | |
366 | {"rep", s_rept, 0}, | |
367 | {"rept", s_rept, 0}, | |
368 | {"rva", s_rva, 4}, | |
369 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ | |
370 | /* scl */ | |
371 | /* sect */ | |
372 | {"set", s_set, 0}, | |
373 | {"short", cons, 2}, | |
374 | {"single", float_cons, 'f'}, | |
375 | /* size */ | |
376 | {"space", s_space, 0}, | |
377 | {"skip", s_space, 0}, | |
378 | {"sleb128", s_leb128, 1}, | |
379 | {"spc", s_ignore, 0}, | |
380 | {"stabd", s_stab, 'd'}, | |
381 | {"stabn", s_stab, 'n'}, | |
382 | {"stabs", s_stab, 's'}, | |
383 | {"string", stringer, 1}, | |
384 | {"struct", s_struct, 0}, | |
385 | /* tag */ | |
386 | {"text", s_text, 0}, | |
387 | ||
388 | /* This is for gcc to use. It's only just been added (2/94), so gcc | |
389 | won't be able to use it for a while -- probably a year or more. | |
390 | But once this has been released, check with gcc maintainers | |
391 | before deleting it or even changing the spelling. */ | |
392 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, | |
393 | /* If we're folding case -- done for some targets, not necessarily | |
394 | all -- the above string in an input file will be converted to | |
395 | this one. Match it either way... */ | |
396 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, | |
397 | ||
398 | {"title", listing_title, 0}, /* Listing title */ | |
399 | {"ttl", listing_title, 0}, | |
400 | /* type */ | |
401 | {"uleb128", s_leb128, 0}, | |
402 | /* use */ | |
403 | /* val */ | |
404 | {"xcom", s_comm, 0}, | |
405 | {"xdef", s_globl, 0}, | |
406 | {"xref", s_ignore, 0}, | |
407 | {"xstabs", s_xstab, 's'}, | |
408 | {"word", cons, 2}, | |
409 | {"zero", s_space, 0}, | |
410 | {NULL} /* end sentinel */ | |
411 | }; | |
412 | ||
413 | static int pop_override_ok = 0; | |
414 | static const char *pop_table_name; | |
415 | ||
416 | void | |
417 | pop_insert (table) | |
418 | const pseudo_typeS *table; | |
419 | { | |
420 | const char *errtxt; | |
421 | const pseudo_typeS *pop; | |
422 | for (pop = table; pop->poc_name; pop++) | |
423 | { | |
424 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
425 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) | |
426 | as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name, | |
427 | errtxt); | |
428 | } | |
429 | } | |
430 | ||
431 | #ifndef md_pop_insert | |
432 | #define md_pop_insert() pop_insert(md_pseudo_table) | |
433 | #endif | |
434 | ||
435 | #ifndef obj_pop_insert | |
436 | #define obj_pop_insert() pop_insert(obj_pseudo_table) | |
437 | #endif | |
438 | ||
439 | static void | |
440 | pobegin () | |
441 | { | |
442 | po_hash = hash_new (); | |
443 | ||
444 | /* Do the target-specific pseudo ops. */ | |
445 | pop_table_name = "md"; | |
446 | md_pop_insert (); | |
447 | ||
448 | /* Now object specific. Skip any that were in the target table. */ | |
449 | pop_table_name = "obj"; | |
450 | pop_override_ok = 1; | |
451 | obj_pop_insert (); | |
452 | ||
453 | /* Now portable ones. Skip any that we've seen already. */ | |
454 | pop_table_name = "standard"; | |
455 | pop_insert (potable); | |
456 | } | |
457 | \f | |
458 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ | |
459 | if (ignore_input ()) \ | |
460 | { \ | |
461 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
462 | if (input_line_pointer == buffer_limit) \ | |
463 | break; \ | |
464 | continue; \ | |
465 | } | |
466 | ||
467 | ||
468 | /* This function is used when scrubbing the characters between #APP | |
469 | and #NO_APP. */ | |
470 | ||
471 | static char *scrub_string; | |
472 | static char *scrub_string_end; | |
473 | ||
474 | static int | |
475 | scrub_from_string (from) | |
476 | char **from; | |
477 | { | |
478 | int size; | |
479 | ||
480 | *from = scrub_string; | |
481 | size = scrub_string_end - scrub_string; | |
482 | scrub_string = scrub_string_end; | |
483 | return size; | |
484 | } | |
485 | ||
486 | /* read_a_source_file() | |
487 | * | |
488 | * We read the file, putting things into a web that | |
489 | * represents what we have been reading. | |
490 | */ | |
491 | void | |
492 | read_a_source_file (name) | |
493 | char *name; | |
494 | { | |
495 | register char c; | |
496 | register char *s; /* string of symbol, '\0' appended */ | |
497 | register int temp; | |
498 | pseudo_typeS *pop; | |
499 | ||
500 | buffer = input_scrub_new_file (name); | |
501 | ||
502 | listing_file (name); | |
503 | listing_newline (NULL); | |
504 | register_dependency (name); | |
505 | ||
506 | /* Generate debugging information before we've read anything in to denote | |
507 | this file as the "main" source file and not a subordinate one | |
508 | (e.g. N_SO vs N_SOL in stabs). */ | |
509 | generate_file_debug (); | |
510 | ||
511 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) | |
512 | { /* We have another line to parse. */ | |
513 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
514 | contin: /* JF this goto is my fault I admit it. | |
515 | Someone brave please re-write the whole | |
516 | input section here? Pleeze??? */ | |
517 | while (input_line_pointer < buffer_limit) | |
518 | { | |
519 | /* We have more of this buffer to parse. */ | |
520 | ||
521 | /* | |
522 | * We now have input_line_pointer->1st char of next line. | |
523 | * If input_line_pointer [-1] == '\n' then we just | |
524 | * scanned another line: so bump line counters. | |
525 | */ | |
526 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) | |
527 | { | |
528 | #ifdef md_start_line_hook | |
529 | md_start_line_hook (); | |
530 | #endif | |
531 | ||
532 | if (input_line_pointer[-1] == '\n') | |
533 | bump_line_counters (); | |
534 | ||
535 | line_label = NULL; | |
536 | ||
537 | if (flag_m68k_mri | |
538 | #ifdef LABELS_WITHOUT_COLONS | |
539 | || 1 | |
540 | #endif | |
541 | ) | |
542 | { | |
543 | /* Text at the start of a line must be a label, we | |
544 | run down and stick a colon in. */ | |
545 | if (is_name_beginner (*input_line_pointer)) | |
546 | { | |
547 | char *line_start = input_line_pointer; | |
548 | char c; | |
549 | int mri_line_macro; | |
550 | ||
551 | LISTING_NEWLINE (); | |
552 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
553 | ||
554 | c = get_symbol_end (); | |
555 | ||
556 | /* In MRI mode, the EQU and MACRO pseudoops must | |
557 | be handled specially. */ | |
558 | mri_line_macro = 0; | |
559 | if (flag_m68k_mri) | |
560 | { | |
561 | char *rest = input_line_pointer + 1; | |
562 | ||
563 | if (*rest == ':') | |
564 | ++rest; | |
565 | if (*rest == ' ' || *rest == '\t') | |
566 | ++rest; | |
567 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
568 | || strncasecmp (rest, "SET", 3) == 0) | |
569 | && (rest[3] == ' ' || rest[3] == '\t')) | |
570 | { | |
571 | input_line_pointer = rest + 3; | |
572 | equals (line_start, | |
573 | strncasecmp (rest, "SET", 3) == 0); | |
574 | continue; | |
575 | } | |
576 | if (strncasecmp (rest, "MACRO", 5) == 0 | |
577 | && (rest[5] == ' ' | |
578 | || rest[5] == '\t' | |
579 | || is_end_of_line[(unsigned char) rest[5]])) | |
580 | mri_line_macro = 1; | |
581 | } | |
582 | ||
583 | /* In MRI mode, we need to handle the MACRO | |
584 | pseudo-op specially: we don't want to put the | |
585 | symbol in the symbol table. */ | |
586 | if (! mri_line_macro) | |
587 | line_label = colon (line_start); | |
588 | else | |
589 | line_label = symbol_create (line_start, | |
590 | absolute_section, | |
591 | (valueT) 0, | |
592 | &zero_address_frag); | |
593 | ||
594 | *input_line_pointer = c; | |
595 | if (c == ':') | |
596 | input_line_pointer++; | |
597 | } | |
598 | } | |
599 | } | |
600 | ||
601 | /* | |
602 | * We are at the begining of a line, or similar place. | |
603 | * We expect a well-formed assembler statement. | |
604 | * A "symbol-name:" is a statement. | |
605 | * | |
606 | * Depending on what compiler is used, the order of these tests | |
607 | * may vary to catch most common case 1st. | |
608 | * Each test is independent of all other tests at the (top) level. | |
609 | * PLEASE make a compiler that doesn't use this assembler. | |
610 | * It is crufty to waste a compiler's time encoding things for this | |
611 | * assembler, which then wastes more time decoding it. | |
612 | * (And communicating via (linear) files is silly! | |
613 | * If you must pass stuff, please pass a tree!) | |
614 | */ | |
615 | if ((c = *input_line_pointer++) == '\t' | |
616 | || c == ' ' | |
617 | || c == '\f' | |
618 | || c == 0) | |
619 | { | |
620 | c = *input_line_pointer++; | |
621 | } | |
622 | know (c != ' '); /* No further leading whitespace. */ | |
623 | ||
624 | #ifndef NO_LISTING | |
625 | /* If listing is on, and we are expanding a macro, then give | |
626 | the listing code the contents of the expanded line. */ | |
627 | if (listing) | |
628 | { | |
629 | if ((listing & LISTING_MACEXP) && macro_nest > 0) | |
630 | { | |
631 | char *copy; | |
632 | int len; | |
633 | ||
634 | /* Find the end of the current expanded macro line. */ | |
635 | for (s = input_line_pointer-1; *s ; ++s) | |
636 | if (is_end_of_line[(unsigned char) *s]) | |
637 | break; | |
638 | ||
639 | /* Copy it for safe keeping. Also give an indication of | |
640 | how much macro nesting is involved at this point. */ | |
641 | len = s - (input_line_pointer-1); | |
642 | copy = (char *) xmalloc (len + macro_nest + 2); | |
643 | memset (copy, '>', macro_nest); | |
644 | copy[macro_nest] = ' '; | |
645 | memcpy (copy + macro_nest + 1, input_line_pointer-1, len); | |
646 | copy[macro_nest+1+len] = '\0'; | |
647 | ||
648 | /* Install the line with the listing facility. */ | |
649 | listing_newline (copy); | |
650 | } | |
651 | else | |
652 | listing_newline (NULL); | |
653 | } | |
654 | #endif | |
655 | ||
656 | /* | |
657 | * C is the 1st significant character. | |
658 | * Input_line_pointer points after that character. | |
659 | */ | |
660 | if (is_name_beginner (c)) | |
661 | { | |
662 | /* want user-defined label or pseudo/opcode */ | |
663 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
664 | ||
665 | s = --input_line_pointer; | |
666 | c = get_symbol_end (); /* name's delimiter */ | |
667 | /* | |
668 | * C is character after symbol. | |
669 | * That character's place in the input line is now '\0'. | |
670 | * S points to the beginning of the symbol. | |
671 | * [In case of pseudo-op, s->'.'.] | |
672 | * Input_line_pointer->'\0' where c was. | |
673 | */ | |
674 | if (TC_START_LABEL(c, input_line_pointer)) | |
675 | { | |
676 | if (flag_m68k_mri) | |
677 | { | |
678 | char *rest = input_line_pointer + 1; | |
679 | ||
680 | /* In MRI mode, \tsym: set 0 is permitted. */ | |
681 | ||
682 | if (*rest == ':') | |
683 | ++rest; | |
684 | if (*rest == ' ' || *rest == '\t') | |
685 | ++rest; | |
686 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
687 | || strncasecmp (rest, "SET", 3) == 0) | |
688 | && (rest[3] == ' ' || rest[3] == '\t')) | |
689 | { | |
690 | input_line_pointer = rest + 3; | |
691 | equals (s, 1); | |
692 | continue; | |
693 | } | |
694 | } | |
695 | ||
696 | line_label = colon (s); /* user-defined label */ | |
697 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ | |
698 | /* Input_line_pointer->after ':'. */ | |
699 | SKIP_WHITESPACE (); | |
700 | ||
701 | ||
702 | } | |
703 | else if (c == '=' | |
704 | || ((c == ' ' || c == '\t') | |
705 | && input_line_pointer[1] == '=' | |
706 | #ifdef TC_EQUAL_IN_INSN | |
707 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
708 | #endif | |
709 | )) | |
710 | { | |
711 | equals (s, 1); | |
712 | demand_empty_rest_of_line (); | |
713 | } | |
714 | else | |
715 | { /* expect pseudo-op or machine instruction */ | |
716 | pop = NULL; | |
717 | ||
718 | #define IGNORE_OPCODE_CASE | |
719 | #ifdef IGNORE_OPCODE_CASE | |
720 | { | |
721 | char *s2 = s; | |
722 | while (*s2) | |
723 | { | |
724 | if (isupper ((unsigned char) *s2)) | |
725 | *s2 = tolower (*s2); | |
726 | s2++; | |
727 | } | |
728 | } | |
729 | #endif | |
730 | ||
731 | if (flag_m68k_mri | |
732 | #ifdef NO_PSEUDO_DOT | |
733 | || 1 | |
734 | #endif | |
735 | ) | |
736 | { | |
737 | /* The MRI assembler and the m88k use pseudo-ops | |
738 | without a period. */ | |
739 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
740 | if (pop != NULL && pop->poc_handler == NULL) | |
741 | pop = NULL; | |
742 | } | |
743 | ||
744 | if (pop != NULL | |
745 | || (! flag_m68k_mri && *s == '.')) | |
746 | { | |
747 | /* | |
748 | * PSEUDO - OP. | |
749 | * | |
750 | * WARNING: c has next char, which may be end-of-line. | |
751 | * We lookup the pseudo-op table with s+1 because we | |
752 | * already know that the pseudo-op begins with a '.'. | |
753 | */ | |
754 | ||
755 | if (pop == NULL) | |
756 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
757 | ||
758 | /* In MRI mode, we may need to insert an | |
759 | automatic alignment directive. What a hack | |
760 | this is. */ | |
761 | if (mri_pending_align | |
762 | && (pop == NULL | |
763 | || ! ((pop->poc_handler == cons | |
764 | && pop->poc_val == 1) | |
765 | || (pop->poc_handler == s_space | |
766 | && pop->poc_val == 1) | |
767 | #ifdef tc_conditional_pseudoop | |
768 | || tc_conditional_pseudoop (pop) | |
769 | #endif | |
770 | || pop->poc_handler == s_if | |
771 | || pop->poc_handler == s_ifdef | |
772 | || pop->poc_handler == s_ifc | |
773 | || pop->poc_handler == s_ifeqs | |
774 | || pop->poc_handler == s_else | |
775 | || pop->poc_handler == s_endif | |
776 | || pop->poc_handler == s_globl | |
777 | || pop->poc_handler == s_ignore))) | |
778 | { | |
779 | do_align (1, (char *) NULL, 0, 0); | |
780 | mri_pending_align = 0; | |
781 | if (line_label != NULL) | |
782 | { | |
783 | line_label->sy_frag = frag_now; | |
784 | S_SET_VALUE (line_label, frag_now_fix ()); | |
785 | } | |
786 | } | |
787 | ||
788 | /* Print the error msg now, while we still can */ | |
789 | if (pop == NULL) | |
790 | { | |
791 | as_bad (_("Unknown pseudo-op: `%s'"), s); | |
792 | *input_line_pointer = c; | |
793 | s_ignore (0); | |
794 | continue; | |
795 | } | |
796 | ||
797 | /* Put it back for error messages etc. */ | |
798 | *input_line_pointer = c; | |
799 | /* The following skip of whitespace is compulsory. | |
800 | A well shaped space is sometimes all that separates | |
801 | keyword from operands. */ | |
802 | if (c == ' ' || c == '\t') | |
803 | input_line_pointer++; | |
804 | /* | |
805 | * Input_line is restored. | |
806 | * Input_line_pointer->1st non-blank char | |
807 | * after pseudo-operation. | |
808 | */ | |
809 | (*pop->poc_handler) (pop->poc_val); | |
810 | ||
811 | /* If that was .end, just get out now. */ | |
812 | if (pop->poc_handler == s_end) | |
813 | goto quit; | |
814 | } | |
815 | else | |
816 | { | |
817 | int inquote = 0; | |
818 | ||
819 | /* WARNING: c has char, which may be end-of-line. */ | |
820 | /* Also: input_line_pointer->`\0` where c was. */ | |
821 | *input_line_pointer = c; | |
822 | while (!is_end_of_line[(unsigned char) *input_line_pointer] | |
823 | || inquote | |
824 | #ifdef TC_EOL_IN_INSN | |
825 | || TC_EOL_IN_INSN (input_line_pointer) | |
826 | #endif | |
827 | ) | |
828 | { | |
829 | if (flag_m68k_mri && *input_line_pointer == '\'') | |
830 | inquote = ! inquote; | |
831 | input_line_pointer++; | |
832 | } | |
833 | ||
834 | c = *input_line_pointer; | |
835 | *input_line_pointer = '\0'; | |
836 | ||
837 | generate_lineno_debug (); | |
838 | ||
839 | if (macro_defined) | |
840 | { | |
841 | sb out; | |
842 | const char *err; | |
843 | ||
844 | if (check_macro (s, &out, '\0', &err)) | |
845 | { | |
846 | if (err != NULL) | |
847 | as_bad (err); | |
848 | *input_line_pointer++ = c; | |
849 | input_scrub_include_sb (&out, | |
850 | input_line_pointer); | |
851 | sb_kill (&out); | |
852 | buffer_limit = | |
853 | input_scrub_next_buffer (&input_line_pointer); | |
854 | continue; | |
855 | } | |
856 | } | |
857 | ||
858 | if (mri_pending_align) | |
859 | { | |
860 | do_align (1, (char *) NULL, 0, 0); | |
861 | mri_pending_align = 0; | |
862 | if (line_label != NULL) | |
863 | { | |
864 | line_label->sy_frag = frag_now; | |
865 | S_SET_VALUE (line_label, frag_now_fix ()); | |
866 | } | |
867 | } | |
868 | ||
869 | md_assemble (s); /* Assemble 1 instruction. */ | |
870 | ||
871 | *input_line_pointer++ = c; | |
872 | ||
873 | /* We resume loop AFTER the end-of-line from | |
874 | this instruction. */ | |
875 | } /* if (*s=='.') */ | |
876 | } /* if c==':' */ | |
877 | continue; | |
878 | } /* if (is_name_beginner(c) */ | |
879 | ||
880 | ||
881 | /* Empty statement? */ | |
882 | if (is_end_of_line[(unsigned char) c]) | |
883 | continue; | |
884 | ||
885 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) | |
886 | && isdigit ((unsigned char) c)) | |
887 | { | |
888 | /* local label ("4:") */ | |
889 | char *backup = input_line_pointer; | |
890 | ||
891 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
892 | ||
893 | temp = c - '0'; | |
894 | ||
895 | while (isdigit ((unsigned char) *input_line_pointer)) | |
896 | { | |
897 | temp = (temp * 10) + *input_line_pointer - '0'; | |
898 | ++input_line_pointer; | |
899 | } /* read the whole number */ | |
900 | ||
901 | if (LOCAL_LABELS_DOLLAR | |
902 | && *input_line_pointer == '$' | |
903 | && *(input_line_pointer + 1) == ':') | |
904 | { | |
905 | input_line_pointer += 2; | |
906 | ||
907 | if (dollar_label_defined (temp)) | |
908 | { | |
909 | as_fatal (_("label \"%d$\" redefined"), temp); | |
910 | } | |
911 | ||
912 | define_dollar_label (temp); | |
913 | colon (dollar_label_name (temp, 0)); | |
914 | continue; | |
915 | } | |
916 | ||
917 | if (LOCAL_LABELS_FB | |
918 | && *input_line_pointer++ == ':') | |
919 | { | |
920 | fb_label_instance_inc (temp); | |
921 | colon (fb_label_name (temp, 0)); | |
922 | continue; | |
923 | } | |
924 | ||
925 | input_line_pointer = backup; | |
926 | } /* local label ("4:") */ | |
927 | ||
928 | if (c && strchr (line_comment_chars, c)) | |
929 | { /* Its a comment. Better say APP or NO_APP */ | |
930 | char *ends; | |
931 | char *new_buf; | |
932 | char *new_tmp; | |
933 | unsigned int new_length; | |
934 | char *tmp_buf = 0; | |
935 | ||
936 | bump_line_counters (); | |
937 | s = input_line_pointer; | |
938 | if (strncmp (s, "APP\n", 4)) | |
939 | continue; /* We ignore it */ | |
940 | s += 4; | |
941 | ||
942 | ends = strstr (s, "#NO_APP\n"); | |
943 | ||
944 | if (!ends) | |
945 | { | |
946 | unsigned int tmp_len; | |
947 | unsigned int num; | |
948 | ||
949 | /* The end of the #APP wasn't in this buffer. We | |
950 | keep reading in buffers until we find the #NO_APP | |
951 | that goes with this #APP There is one. The specs | |
952 | guarentee it. . . */ | |
953 | tmp_len = buffer_limit - s; | |
954 | tmp_buf = xmalloc (tmp_len + 1); | |
955 | memcpy (tmp_buf, s, tmp_len); | |
956 | do | |
957 | { | |
958 | new_tmp = input_scrub_next_buffer (&buffer); | |
959 | if (!new_tmp) | |
960 | break; | |
961 | else | |
962 | buffer_limit = new_tmp; | |
963 | input_line_pointer = buffer; | |
964 | ends = strstr (buffer, "#NO_APP\n"); | |
965 | if (ends) | |
966 | num = ends - buffer; | |
967 | else | |
968 | num = buffer_limit - buffer; | |
969 | ||
970 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
971 | memcpy (tmp_buf + tmp_len, buffer, num); | |
972 | tmp_len += num; | |
973 | } | |
974 | while (!ends); | |
975 | ||
976 | input_line_pointer = ends ? ends + 8 : NULL; | |
977 | ||
978 | s = tmp_buf; | |
979 | ends = s + tmp_len; | |
980 | ||
981 | } | |
982 | else | |
983 | { | |
984 | input_line_pointer = ends + 8; | |
985 | } | |
986 | ||
987 | scrub_string = s; | |
988 | scrub_string_end = ends; | |
989 | ||
990 | new_length = ends - s; | |
991 | new_buf = (char *) xmalloc (new_length); | |
992 | new_tmp = new_buf; | |
993 | for (;;) | |
994 | { | |
995 | int space; | |
996 | int size; | |
997 | ||
998 | space = (new_buf + new_length) - new_tmp; | |
999 | size = do_scrub_chars (scrub_from_string, new_tmp, space); | |
1000 | ||
1001 | if (size < space) | |
1002 | { | |
1003 | new_tmp += size; | |
1004 | break; | |
1005 | } | |
1006 | ||
1007 | new_buf = xrealloc (new_buf, new_length + 100); | |
1008 | new_tmp = new_buf + new_length; | |
1009 | new_length += 100; | |
1010 | } | |
1011 | ||
1012 | if (tmp_buf) | |
1013 | free (tmp_buf); | |
1014 | old_buffer = buffer; | |
1015 | old_input = input_line_pointer; | |
1016 | old_limit = buffer_limit; | |
1017 | buffer = new_buf; | |
1018 | input_line_pointer = new_buf; | |
1019 | buffer_limit = new_tmp; | |
1020 | continue; | |
1021 | } | |
1022 | ||
1023 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
1024 | ||
1025 | #ifdef tc_unrecognized_line | |
1026 | if (tc_unrecognized_line (c)) | |
1027 | continue; | |
1028 | #endif | |
1029 | ||
1030 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
1031 | input_line_pointer--; /* Report unknown char as ignored. */ | |
1032 | ignore_rest_of_line (); | |
1033 | } /* while (input_line_pointer<buffer_limit) */ | |
1034 | ||
1035 | #ifdef md_after_pass_hook | |
1036 | md_after_pass_hook (); | |
1037 | #endif | |
1038 | ||
1039 | if (old_buffer) | |
1040 | { | |
1041 | free (buffer); | |
1042 | bump_line_counters (); | |
1043 | if (old_input != 0) | |
1044 | { | |
1045 | buffer = old_buffer; | |
1046 | input_line_pointer = old_input; | |
1047 | buffer_limit = old_limit; | |
1048 | old_buffer = 0; | |
1049 | goto contin; | |
1050 | } | |
1051 | } | |
1052 | } /* while (more buffers to scan) */ | |
1053 | ||
1054 | quit: | |
1055 | ||
1056 | #ifdef md_cleanup | |
1057 | md_cleanup(); | |
1058 | #endif | |
1059 | input_scrub_close (); /* Close the input file */ | |
1060 | } | |
1061 | ||
1062 | /* For most MRI pseudo-ops, the line actually ends at the first | |
1063 | nonquoted space. This function looks for that point, stuffs a null | |
1064 | in, and sets *STOPCP to the character that used to be there, and | |
1065 | returns the location. | |
1066 | ||
1067 | Until I hear otherwise, I am going to assume that this is only true | |
1068 | for the m68k MRI assembler. */ | |
1069 | ||
1070 | char * | |
1071 | mri_comment_field (stopcp) | |
1072 | char *stopcp; | |
1073 | { | |
1074 | #ifdef TC_M68K | |
1075 | ||
1076 | char *s; | |
1077 | int inquote = 0; | |
1078 | ||
1079 | know (flag_m68k_mri); | |
1080 | ||
1081 | for (s = input_line_pointer; | |
1082 | ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t') | |
1083 | || inquote); | |
1084 | s++) | |
1085 | { | |
1086 | if (*s == '\'') | |
1087 | inquote = ! inquote; | |
1088 | } | |
1089 | *stopcp = *s; | |
1090 | *s = '\0'; | |
1091 | return s; | |
1092 | ||
1093 | #else | |
1094 | ||
1095 | char *s; | |
1096 | ||
1097 | for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++) | |
1098 | ; | |
1099 | *stopcp = *s; | |
1100 | *s = '\0'; | |
1101 | return s; | |
1102 | ||
1103 | #endif | |
1104 | ||
1105 | } | |
1106 | ||
1107 | /* Skip to the end of an MRI comment field. */ | |
1108 | ||
1109 | void | |
1110 | mri_comment_end (stop, stopc) | |
1111 | char *stop; | |
1112 | int stopc; | |
1113 | { | |
1114 | know (flag_mri); | |
1115 | ||
1116 | input_line_pointer = stop; | |
1117 | *stop = stopc; | |
1118 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1119 | ++input_line_pointer; | |
1120 | } | |
1121 | ||
1122 | void | |
1123 | s_abort (ignore) | |
1124 | int ignore; | |
1125 | { | |
1126 | as_fatal (_(".abort detected. Abandoning ship.")); | |
1127 | } | |
1128 | ||
1129 | /* Guts of .align directive. N is the power of two to which to align. | |
1130 | FILL may be NULL, or it may point to the bytes of the fill pattern. | |
1131 | LEN is the length of whatever FILL points to, if anything. MAX is | |
1132 | the maximum number of characters to skip when doing the alignment, | |
1133 | or 0 if there is no maximum. */ | |
1134 | ||
1135 | static void | |
1136 | do_align (n, fill, len, max) | |
1137 | int n; | |
1138 | char *fill; | |
1139 | int len; | |
1140 | int max; | |
1141 | { | |
1142 | char default_fill; | |
1143 | ||
1144 | #ifdef md_do_align | |
1145 | md_do_align (n, fill, len, max, just_record_alignment); | |
1146 | #endif | |
1147 | ||
1148 | if (fill == NULL) | |
1149 | { | |
1150 | int maybe_text; | |
1151 | ||
1152 | #ifdef BFD_ASSEMBLER | |
1153 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0) | |
1154 | maybe_text = 1; | |
1155 | else | |
1156 | maybe_text = 0; | |
1157 | #else | |
1158 | if (now_seg != data_section && now_seg != bss_section) | |
1159 | maybe_text = 1; | |
1160 | else | |
1161 | maybe_text = 0; | |
1162 | #endif | |
1163 | ||
1164 | if (maybe_text) | |
1165 | default_fill = NOP_OPCODE; | |
1166 | else | |
1167 | default_fill = 0; | |
1168 | fill = &default_fill; | |
1169 | len = 1; | |
1170 | } | |
1171 | ||
1172 | /* Only make a frag if we HAVE to. . . */ | |
1173 | if (n != 0 && !need_pass_2) | |
1174 | { | |
1175 | if (len <= 1) | |
1176 | frag_align (n, *fill, max); | |
1177 | else | |
1178 | frag_align_pattern (n, fill, len, max); | |
1179 | } | |
1180 | ||
1181 | #ifdef md_do_align | |
1182 | just_record_alignment: | |
1183 | #endif | |
1184 | ||
1185 | record_alignment (now_seg, n); | |
1186 | } | |
1187 | ||
1188 | /* Handle the .align pseudo-op. A positive ARG is a default alignment | |
1189 | (in bytes). A negative ARG is the negative of the length of the | |
1190 | fill pattern. BYTES_P is non-zero if the alignment value should be | |
1191 | interpreted as the byte boundary, rather than the power of 2. */ | |
1192 | ||
1193 | static void | |
1194 | s_align (arg, bytes_p) | |
1195 | int arg; | |
1196 | int bytes_p; | |
1197 | { | |
1198 | register unsigned int align; | |
1199 | char *stop = NULL; | |
1200 | char stopc; | |
1201 | offsetT fill = 0; | |
1202 | int max; | |
1203 | int fill_p; | |
1204 | ||
1205 | if (flag_mri) | |
1206 | stop = mri_comment_field (&stopc); | |
1207 | ||
1208 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
1209 | { | |
1210 | if (arg < 0) | |
1211 | align = 0; | |
1212 | else | |
1213 | align = arg; /* Default value from pseudo-op table */ | |
1214 | } | |
1215 | else | |
1216 | { | |
1217 | align = get_absolute_expression (); | |
1218 | SKIP_WHITESPACE (); | |
1219 | } | |
1220 | ||
1221 | if (bytes_p) | |
1222 | { | |
1223 | /* Convert to a power of 2. */ | |
1224 | if (align != 0) | |
1225 | { | |
1226 | unsigned int i; | |
1227 | ||
1228 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
1229 | ; | |
1230 | if (align != 1) | |
1231 | as_bad (_("Alignment not a power of 2")); | |
1232 | align = i; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | if (align > 15) | |
1237 | { | |
1238 | align = 15; | |
1239 | as_bad (_("Alignment too large: %u assumed"), align); | |
1240 | } | |
1241 | ||
1242 | if (*input_line_pointer != ',') | |
1243 | { | |
1244 | fill_p = 0; | |
1245 | max = 0; | |
1246 | } | |
1247 | else | |
1248 | { | |
1249 | ++input_line_pointer; | |
1250 | if (*input_line_pointer == ',') | |
1251 | fill_p = 0; | |
1252 | else | |
1253 | { | |
1254 | fill = get_absolute_expression (); | |
1255 | SKIP_WHITESPACE (); | |
1256 | fill_p = 1; | |
1257 | } | |
1258 | ||
1259 | if (*input_line_pointer != ',') | |
1260 | max = 0; | |
1261 | else | |
1262 | { | |
1263 | ++input_line_pointer; | |
1264 | max = get_absolute_expression (); | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | if (! fill_p) | |
1269 | { | |
1270 | if (arg < 0) | |
1271 | as_warn (_("expected fill pattern missing")); | |
1272 | do_align (align, (char *) NULL, 0, max); | |
1273 | } | |
1274 | else | |
1275 | { | |
1276 | int fill_len; | |
1277 | ||
1278 | if (arg >= 0) | |
1279 | fill_len = 1; | |
1280 | else | |
1281 | fill_len = - arg; | |
1282 | if (fill_len <= 1) | |
1283 | { | |
1284 | char fill_char; | |
1285 | ||
1286 | fill_char = fill; | |
1287 | do_align (align, &fill_char, fill_len, max); | |
1288 | } | |
1289 | else | |
1290 | { | |
1291 | char ab[16]; | |
1292 | ||
1293 | if ((size_t) fill_len > sizeof ab) | |
1294 | abort (); | |
1295 | md_number_to_chars (ab, fill, fill_len); | |
1296 | do_align (align, ab, fill_len, max); | |
1297 | } | |
1298 | } | |
1299 | ||
1300 | demand_empty_rest_of_line (); | |
1301 | ||
1302 | if (flag_mri) | |
1303 | mri_comment_end (stop, stopc); | |
1304 | } | |
1305 | ||
1306 | /* Handle the .align pseudo-op on machines where ".align 4" means | |
1307 | align to a 4 byte boundary. */ | |
1308 | ||
1309 | void | |
1310 | s_align_bytes (arg) | |
1311 | int arg; | |
1312 | { | |
1313 | s_align (arg, 1); | |
1314 | } | |
1315 | ||
1316 | /* Handle the .align pseudo-op on machines where ".align 4" means align | |
1317 | to a 2**4 boundary. */ | |
1318 | ||
1319 | void | |
1320 | s_align_ptwo (arg) | |
1321 | int arg; | |
1322 | { | |
1323 | s_align (arg, 0); | |
1324 | } | |
1325 | ||
1326 | void | |
1327 | s_comm (ignore) | |
1328 | int ignore; | |
1329 | { | |
1330 | register char *name; | |
1331 | register char c; | |
1332 | register char *p; | |
1333 | offsetT temp; | |
1334 | register symbolS *symbolP; | |
1335 | char *stop = NULL; | |
1336 | char stopc; | |
1337 | ||
1338 | if (flag_mri) | |
1339 | stop = mri_comment_field (&stopc); | |
1340 | ||
1341 | name = input_line_pointer; | |
1342 | c = get_symbol_end (); | |
1343 | /* just after name is now '\0' */ | |
1344 | p = input_line_pointer; | |
1345 | *p = c; | |
1346 | SKIP_WHITESPACE (); | |
1347 | if (*input_line_pointer != ',') | |
1348 | { | |
1349 | as_bad (_("Expected comma after symbol-name: rest of line ignored.")); | |
1350 | ignore_rest_of_line (); | |
1351 | if (flag_mri) | |
1352 | mri_comment_end (stop, stopc); | |
1353 | return; | |
1354 | } | |
1355 | input_line_pointer++; /* skip ',' */ | |
1356 | if ((temp = get_absolute_expression ()) < 0) | |
1357 | { | |
1358 | as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) temp); | |
1359 | ignore_rest_of_line (); | |
1360 | if (flag_mri) | |
1361 | mri_comment_end (stop, stopc); | |
1362 | return; | |
1363 | } | |
1364 | *p = 0; | |
1365 | symbolP = symbol_find_or_make (name); | |
1366 | *p = c; | |
1367 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
1368 | { | |
1369 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
1370 | S_GET_NAME (symbolP)); | |
1371 | ignore_rest_of_line (); | |
1372 | if (flag_mri) | |
1373 | mri_comment_end (stop, stopc); | |
1374 | return; | |
1375 | } | |
1376 | if (S_GET_VALUE (symbolP)) | |
1377 | { | |
1378 | if (S_GET_VALUE (symbolP) != (valueT) temp) | |
1379 | as_bad (_("Length of .comm \"%s\" is already %ld. Not changed to %ld."), | |
1380 | S_GET_NAME (symbolP), | |
1381 | (long) S_GET_VALUE (symbolP), | |
1382 | (long) temp); | |
1383 | } | |
1384 | else | |
1385 | { | |
1386 | S_SET_VALUE (symbolP, (valueT) temp); | |
1387 | S_SET_EXTERNAL (symbolP); | |
1388 | } | |
1389 | #ifdef OBJ_VMS | |
1390 | { | |
1391 | extern int flag_one; | |
1392 | if ( (!temp) || !flag_one) | |
1393 | S_GET_OTHER(symbolP) = const_flag; | |
1394 | } | |
1395 | #endif /* not OBJ_VMS */ | |
1396 | know (symbolP->sy_frag == &zero_address_frag); | |
1397 | ||
1398 | demand_empty_rest_of_line (); | |
1399 | ||
1400 | if (flag_mri) | |
1401 | mri_comment_end (stop, stopc); | |
1402 | } /* s_comm() */ | |
1403 | ||
1404 | /* The MRI COMMON pseudo-op. We handle this by creating a common | |
1405 | symbol with the appropriate name. We make s_space do the right | |
1406 | thing by increasing the size. */ | |
1407 | ||
1408 | void | |
1409 | s_mri_common (small) | |
1410 | int small; | |
1411 | { | |
1412 | char *name; | |
1413 | char c; | |
1414 | char *alc = NULL; | |
1415 | symbolS *sym; | |
1416 | offsetT align; | |
1417 | char *stop = NULL; | |
1418 | char stopc; | |
1419 | ||
1420 | if (! flag_mri) | |
1421 | { | |
1422 | s_comm (0); | |
1423 | return; | |
1424 | } | |
1425 | ||
1426 | stop = mri_comment_field (&stopc); | |
1427 | ||
1428 | SKIP_WHITESPACE (); | |
1429 | ||
1430 | name = input_line_pointer; | |
1431 | if (! isdigit ((unsigned char) *name)) | |
1432 | c = get_symbol_end (); | |
1433 | else | |
1434 | { | |
1435 | do | |
1436 | { | |
1437 | ++input_line_pointer; | |
1438 | } | |
1439 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1440 | c = *input_line_pointer; | |
1441 | *input_line_pointer = '\0'; | |
1442 | ||
1443 | if (line_label != NULL) | |
1444 | { | |
1445 | alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) | |
1446 | + (input_line_pointer - name) | |
1447 | + 1); | |
1448 | sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); | |
1449 | name = alc; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | sym = symbol_find_or_make (name); | |
1454 | *input_line_pointer = c; | |
1455 | if (alc != NULL) | |
1456 | free (alc); | |
1457 | ||
1458 | if (*input_line_pointer != ',') | |
1459 | align = 0; | |
1460 | else | |
1461 | { | |
1462 | ++input_line_pointer; | |
1463 | align = get_absolute_expression (); | |
1464 | } | |
1465 | ||
1466 | if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym)) | |
1467 | { | |
1468 | as_bad (_("attempt to re-define symbol `%s'"), S_GET_NAME (sym)); | |
1469 | ignore_rest_of_line (); | |
1470 | mri_comment_end (stop, stopc); | |
1471 | return; | |
1472 | } | |
1473 | ||
1474 | S_SET_EXTERNAL (sym); | |
1475 | mri_common_symbol = sym; | |
1476 | ||
1477 | #ifdef S_SET_ALIGN | |
1478 | if (align != 0) | |
1479 | S_SET_ALIGN (sym, align); | |
1480 | #endif | |
1481 | ||
1482 | if (line_label != NULL) | |
1483 | { | |
1484 | line_label->sy_value.X_op = O_symbol; | |
1485 | line_label->sy_value.X_add_symbol = sym; | |
1486 | line_label->sy_value.X_add_number = S_GET_VALUE (sym); | |
1487 | line_label->sy_frag = &zero_address_frag; | |
1488 | S_SET_SEGMENT (line_label, expr_section); | |
1489 | } | |
1490 | ||
1491 | /* FIXME: We just ignore the small argument, which distinguishes | |
1492 | COMMON and COMMON.S. I don't know what we can do about it. */ | |
1493 | ||
1494 | /* Ignore the type and hptype. */ | |
1495 | if (*input_line_pointer == ',') | |
1496 | input_line_pointer += 2; | |
1497 | if (*input_line_pointer == ',') | |
1498 | input_line_pointer += 2; | |
1499 | ||
1500 | demand_empty_rest_of_line (); | |
1501 | ||
1502 | mri_comment_end (stop, stopc); | |
1503 | } | |
1504 | ||
1505 | void | |
1506 | s_data (ignore) | |
1507 | int ignore; | |
1508 | { | |
1509 | segT section; | |
1510 | register int temp; | |
1511 | ||
1512 | temp = get_absolute_expression (); | |
1513 | if (flag_readonly_data_in_text) | |
1514 | { | |
1515 | section = text_section; | |
1516 | temp += 1000; | |
1517 | } | |
1518 | else | |
1519 | section = data_section; | |
1520 | ||
1521 | subseg_set (section, (subsegT) temp); | |
1522 | ||
1523 | #ifdef OBJ_VMS | |
1524 | const_flag = 0; | |
1525 | #endif | |
1526 | demand_empty_rest_of_line (); | |
1527 | } | |
1528 | ||
1529 | /* Handle the .appfile pseudo-op. This is automatically generated by | |
1530 | do_scrub_chars when a preprocessor # line comment is seen with a | |
1531 | file name. This default definition may be overridden by the object | |
1532 | or CPU specific pseudo-ops. This function is also the default | |
1533 | definition for .file; the APPFILE argument is 1 for .appfile, 0 for | |
1534 | .file. */ | |
1535 | ||
1536 | void | |
1537 | s_app_file (appfile) | |
1538 | int appfile; | |
1539 | { | |
1540 | register char *s; | |
1541 | int length; | |
1542 | ||
1543 | /* Some assemblers tolerate immediately following '"' */ | |
1544 | if ((s = demand_copy_string (&length)) != 0) | |
1545 | { | |
1546 | /* If this is a fake .appfile, a fake newline was inserted into | |
1547 | the buffer. Passing -2 to new_logical_line tells it to | |
1548 | account for it. */ | |
1549 | int may_omit | |
1550 | = (! new_logical_line (s, appfile ? -2 : -1) && appfile); | |
1551 | ||
1552 | /* In MRI mode, the preprocessor may have inserted an extraneous | |
1553 | backquote. */ | |
1554 | if (flag_m68k_mri | |
1555 | && *input_line_pointer == '\'' | |
1556 | && is_end_of_line[(unsigned char) input_line_pointer[1]]) | |
1557 | ++input_line_pointer; | |
1558 | ||
1559 | demand_empty_rest_of_line (); | |
1560 | if (! may_omit) | |
1561 | { | |
1562 | #ifdef LISTING | |
1563 | if (listing) | |
1564 | listing_source_file (s); | |
1565 | #endif | |
1566 | register_dependency (s); | |
1567 | #ifdef obj_app_file | |
1568 | obj_app_file (s); | |
1569 | #endif | |
1570 | } | |
1571 | } | |
1572 | } | |
1573 | ||
1574 | /* Handle the .appline pseudo-op. This is automatically generated by | |
1575 | do_scrub_chars when a preprocessor # line comment is seen. This | |
1576 | default definition may be overridden by the object or CPU specific | |
1577 | pseudo-ops. */ | |
1578 | ||
1579 | void | |
1580 | s_app_line (ignore) | |
1581 | int ignore; | |
1582 | { | |
1583 | int l; | |
1584 | ||
1585 | /* The given number is that of the next line. */ | |
1586 | l = get_absolute_expression () - 1; | |
1587 | if (l < 0) | |
1588 | /* Some of the back ends can't deal with non-positive line numbers. | |
1589 | Besides, it's silly. */ | |
1590 | as_warn (_("Line numbers must be positive; line number %d rejected."), l+1); | |
1591 | else | |
1592 | { | |
1593 | new_logical_line ((char *) NULL, l); | |
1594 | #ifdef LISTING | |
1595 | if (listing) | |
1596 | listing_source_line (l); | |
1597 | #endif | |
1598 | } | |
1599 | demand_empty_rest_of_line (); | |
1600 | } | |
1601 | ||
1602 | /* Handle the .end pseudo-op. Actually, the real work is done in | |
1603 | read_a_source_file. */ | |
1604 | ||
1605 | void | |
1606 | s_end (ignore) | |
1607 | int ignore; | |
1608 | { | |
1609 | if (flag_mri) | |
1610 | { | |
1611 | /* The MRI assembler permits the start symbol to follow .end, | |
1612 | but we don't support that. */ | |
1613 | SKIP_WHITESPACE (); | |
1614 | if (! is_end_of_line[(unsigned char) *input_line_pointer] | |
1615 | && *input_line_pointer != '*' | |
1616 | && *input_line_pointer != '!') | |
1617 | as_warn (_("start address not supported")); | |
1618 | } | |
1619 | } | |
1620 | ||
1621 | /* Handle the .err pseudo-op. */ | |
1622 | ||
1623 | void | |
1624 | s_err (ignore) | |
1625 | int ignore; | |
1626 | { | |
1627 | as_bad (_(".err encountered")); | |
1628 | demand_empty_rest_of_line (); | |
1629 | } | |
1630 | ||
1631 | /* Handle the MRI fail pseudo-op. */ | |
1632 | ||
1633 | void | |
1634 | s_fail (ignore) | |
1635 | int ignore; | |
1636 | { | |
1637 | offsetT temp; | |
1638 | char *stop = NULL; | |
1639 | char stopc; | |
1640 | ||
1641 | if (flag_mri) | |
1642 | stop = mri_comment_field (&stopc); | |
1643 | ||
1644 | temp = get_absolute_expression (); | |
1645 | if (temp >= 500) | |
1646 | as_warn (_(".fail %ld encountered"), (long) temp); | |
1647 | else | |
1648 | as_bad (_(".fail %ld encountered"), (long) temp); | |
1649 | ||
1650 | demand_empty_rest_of_line (); | |
1651 | ||
1652 | if (flag_mri) | |
1653 | mri_comment_end (stop, stopc); | |
1654 | } | |
1655 | ||
1656 | void | |
1657 | s_fill (ignore) | |
1658 | int ignore; | |
1659 | { | |
1660 | expressionS rep_exp; | |
1661 | long size = 1; | |
1662 | register long fill = 0; | |
1663 | char *p; | |
1664 | ||
1665 | #ifdef md_flush_pending_output | |
1666 | md_flush_pending_output (); | |
1667 | #endif | |
1668 | ||
1669 | get_known_segmented_expression (&rep_exp); | |
1670 | if (*input_line_pointer == ',') | |
1671 | { | |
1672 | input_line_pointer++; | |
1673 | size = get_absolute_expression (); | |
1674 | if (*input_line_pointer == ',') | |
1675 | { | |
1676 | input_line_pointer++; | |
1677 | fill = get_absolute_expression (); | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ | |
1682 | #define BSD_FILL_SIZE_CROCK_8 (8) | |
1683 | if (size > BSD_FILL_SIZE_CROCK_8) | |
1684 | { | |
1685 | as_warn (_(".fill size clamped to %d."), BSD_FILL_SIZE_CROCK_8); | |
1686 | size = BSD_FILL_SIZE_CROCK_8; | |
1687 | } | |
1688 | if (size < 0) | |
1689 | { | |
1690 | as_warn (_("Size negative: .fill ignored.")); | |
1691 | size = 0; | |
1692 | } | |
1693 | else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0) | |
1694 | { | |
1695 | if (rep_exp.X_add_number < 0) | |
1696 | as_warn (_("Repeat < 0, .fill ignored")); | |
1697 | size = 0; | |
1698 | } | |
1699 | ||
1700 | if (size && !need_pass_2) | |
1701 | { | |
1702 | if (rep_exp.X_op == O_constant) | |
1703 | { | |
1704 | p = frag_var (rs_fill, (int) size, (int) size, | |
1705 | (relax_substateT) 0, (symbolS *) 0, | |
1706 | (offsetT) rep_exp.X_add_number, | |
1707 | (char *) 0); | |
1708 | } | |
1709 | else | |
1710 | { | |
1711 | /* We don't have a constant repeat count, so we can't use | |
1712 | rs_fill. We can get the same results out of rs_space, | |
1713 | but its argument is in bytes, so we must multiply the | |
1714 | repeat count by size. */ | |
1715 | ||
1716 | symbolS *rep_sym; | |
1717 | rep_sym = make_expr_symbol (&rep_exp); | |
1718 | if (size != 1) | |
1719 | { | |
1720 | expressionS size_exp; | |
1721 | size_exp.X_op = O_constant; | |
1722 | size_exp.X_add_number = size; | |
1723 | ||
1724 | rep_exp.X_op = O_multiply; | |
1725 | rep_exp.X_add_symbol = rep_sym; | |
1726 | rep_exp.X_op_symbol = make_expr_symbol (&size_exp); | |
1727 | rep_exp.X_add_number = 0; | |
1728 | rep_sym = make_expr_symbol (&rep_exp); | |
1729 | } | |
1730 | ||
1731 | p = frag_var (rs_space, (int) size, (int) size, | |
1732 | (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0); | |
1733 | } | |
1734 | memset (p, 0, (unsigned int) size); | |
1735 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX | |
1736 | * flavoured AS. The following bizzare behaviour is to be | |
1737 | * compatible with above. I guess they tried to take up to 8 | |
1738 | * bytes from a 4-byte expression and they forgot to sign | |
1739 | * extend. Un*x Sux. */ | |
1740 | #define BSD_FILL_SIZE_CROCK_4 (4) | |
1741 | md_number_to_chars (p, (valueT) fill, | |
1742 | (size > BSD_FILL_SIZE_CROCK_4 | |
1743 | ? BSD_FILL_SIZE_CROCK_4 | |
1744 | : (int) size)); | |
1745 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
1746 | * but emits no error message because it seems a legal thing to do. | |
1747 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
1748 | */ | |
1749 | } | |
1750 | demand_empty_rest_of_line (); | |
1751 | } | |
1752 | ||
1753 | void | |
1754 | s_globl (ignore) | |
1755 | int ignore; | |
1756 | { | |
1757 | char *name; | |
1758 | int c; | |
1759 | symbolS *symbolP; | |
1760 | char *stop = NULL; | |
1761 | char stopc; | |
1762 | ||
1763 | if (flag_mri) | |
1764 | stop = mri_comment_field (&stopc); | |
1765 | ||
1766 | do | |
1767 | { | |
1768 | name = input_line_pointer; | |
1769 | c = get_symbol_end (); | |
1770 | symbolP = symbol_find_or_make (name); | |
1771 | *input_line_pointer = c; | |
1772 | SKIP_WHITESPACE (); | |
1773 | S_SET_EXTERNAL (symbolP); | |
1774 | if (c == ',') | |
1775 | { | |
1776 | input_line_pointer++; | |
1777 | SKIP_WHITESPACE (); | |
1778 | if (*input_line_pointer == '\n') | |
1779 | c = '\n'; | |
1780 | } | |
1781 | } | |
1782 | while (c == ','); | |
1783 | ||
1784 | demand_empty_rest_of_line (); | |
1785 | ||
1786 | if (flag_mri) | |
1787 | mri_comment_end (stop, stopc); | |
1788 | } | |
1789 | ||
1790 | /* Handle the MRI IRP and IRPC pseudo-ops. */ | |
1791 | ||
1792 | void | |
1793 | s_irp (irpc) | |
1794 | int irpc; | |
1795 | { | |
1796 | char *file; | |
1797 | unsigned int line; | |
1798 | sb s; | |
1799 | const char *err; | |
1800 | sb out; | |
1801 | ||
1802 | as_where (&file, &line); | |
1803 | ||
1804 | sb_new (&s); | |
1805 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1806 | sb_add_char (&s, *input_line_pointer++); | |
1807 | ||
1808 | sb_new (&out); | |
1809 | ||
1810 | err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); | |
1811 | if (err != NULL) | |
1812 | as_bad_where (file, line, "%s", err); | |
1813 | ||
1814 | sb_kill (&s); | |
1815 | ||
1816 | input_scrub_include_sb (&out, input_line_pointer); | |
1817 | sb_kill (&out); | |
1818 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1819 | } | |
1820 | ||
1821 | /* Handle the .linkonce pseudo-op. This tells the assembler to mark | |
1822 | the section to only be linked once. However, this is not supported | |
1823 | by most object file formats. This takes an optional argument, | |
1824 | which is what to do about duplicates. */ | |
1825 | ||
1826 | void | |
1827 | s_linkonce (ignore) | |
1828 | int ignore; | |
1829 | { | |
1830 | enum linkonce_type type; | |
1831 | ||
1832 | SKIP_WHITESPACE (); | |
1833 | ||
1834 | type = LINKONCE_DISCARD; | |
1835 | ||
1836 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1837 | { | |
1838 | char *s; | |
1839 | char c; | |
1840 | ||
1841 | s = input_line_pointer; | |
1842 | c = get_symbol_end (); | |
1843 | if (strcasecmp (s, "discard") == 0) | |
1844 | type = LINKONCE_DISCARD; | |
1845 | else if (strcasecmp (s, "one_only") == 0) | |
1846 | type = LINKONCE_ONE_ONLY; | |
1847 | else if (strcasecmp (s, "same_size") == 0) | |
1848 | type = LINKONCE_SAME_SIZE; | |
1849 | else if (strcasecmp (s, "same_contents") == 0) | |
1850 | type = LINKONCE_SAME_CONTENTS; | |
1851 | else | |
1852 | as_warn (_("unrecognized .linkonce type `%s'"), s); | |
1853 | ||
1854 | *input_line_pointer = c; | |
1855 | } | |
1856 | ||
1857 | #ifdef obj_handle_link_once | |
1858 | obj_handle_link_once (type); | |
1859 | #else /* ! defined (obj_handle_link_once) */ | |
1860 | #ifdef BFD_ASSEMBLER | |
1861 | { | |
1862 | flagword flags; | |
1863 | ||
1864 | if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0) | |
1865 | as_warn (_(".linkonce is not supported for this object file format")); | |
1866 | ||
1867 | flags = bfd_get_section_flags (stdoutput, now_seg); | |
1868 | flags |= SEC_LINK_ONCE; | |
1869 | switch (type) | |
1870 | { | |
1871 | default: | |
1872 | abort (); | |
1873 | case LINKONCE_DISCARD: | |
1874 | flags |= SEC_LINK_DUPLICATES_DISCARD; | |
1875 | break; | |
1876 | case LINKONCE_ONE_ONLY: | |
1877 | flags |= SEC_LINK_DUPLICATES_ONE_ONLY; | |
1878 | break; | |
1879 | case LINKONCE_SAME_SIZE: | |
1880 | flags |= SEC_LINK_DUPLICATES_SAME_SIZE; | |
1881 | break; | |
1882 | case LINKONCE_SAME_CONTENTS: | |
1883 | flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
1884 | break; | |
1885 | } | |
1886 | if (! bfd_set_section_flags (stdoutput, now_seg, flags)) | |
1887 | as_bad (_("bfd_set_section_flags: %s"), | |
1888 | bfd_errmsg (bfd_get_error ())); | |
1889 | } | |
1890 | #else /* ! defined (BFD_ASSEMBLER) */ | |
1891 | as_warn (_(".linkonce is not supported for this object file format")); | |
1892 | #endif /* ! defined (BFD_ASSEMBLER) */ | |
1893 | #endif /* ! defined (obj_handle_link_once) */ | |
1894 | ||
1895 | demand_empty_rest_of_line (); | |
1896 | } | |
1897 | ||
1898 | static void | |
1899 | s_lcomm_internal (needs_align, bytes_p) | |
1900 | /* 1 if this was a ".bss" directive, which may require a 3rd argument | |
1901 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1902 | int needs_align; | |
1903 | /* 1 if the alignment value should be interpreted as the byte boundary, | |
1904 | rather than the power of 2. */ | |
1905 | int bytes_p; | |
1906 | { | |
1907 | register char *name; | |
1908 | register char c; | |
1909 | register char *p; | |
1910 | register int temp; | |
1911 | register symbolS *symbolP; | |
1912 | segT current_seg = now_seg; | |
1913 | subsegT current_subseg = now_subseg; | |
1914 | const int max_alignment = 15; | |
1915 | int align = 0; | |
1916 | segT bss_seg = bss_section; | |
1917 | ||
1918 | name = input_line_pointer; | |
1919 | c = get_symbol_end (); | |
1920 | p = input_line_pointer; | |
1921 | *p = c; | |
1922 | SKIP_WHITESPACE (); | |
1923 | ||
1924 | /* Accept an optional comma after the name. The comma used to be | |
1925 | required, but Irix 5 cc does not generate it. */ | |
1926 | if (*input_line_pointer == ',') | |
1927 | { | |
1928 | ++input_line_pointer; | |
1929 | SKIP_WHITESPACE (); | |
1930 | } | |
1931 | ||
1932 | if (*input_line_pointer == '\n') | |
1933 | { | |
1934 | as_bad (_("Missing size expression")); | |
1935 | return; | |
1936 | } | |
1937 | ||
1938 | if ((temp = get_absolute_expression ()) < 0) | |
1939 | { | |
1940 | as_warn (_("BSS length (%d.) <0! Ignored."), temp); | |
1941 | ignore_rest_of_line (); | |
1942 | return; | |
1943 | } | |
1944 | ||
1945 | #if defined (TC_MIPS) || defined (TC_ALPHA) | |
1946 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour | |
1947 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
1948 | { | |
1949 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ | |
1950 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1951 | { | |
1952 | bss_seg = subseg_new (".sbss", 1); | |
1953 | seg_info (bss_seg)->bss = 1; | |
1954 | #ifdef BFD_ASSEMBLER | |
1955 | if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC)) | |
1956 | as_warn (_("error setting flags for \".sbss\": %s"), | |
1957 | bfd_errmsg (bfd_get_error ())); | |
1958 | #endif | |
1959 | } | |
1960 | } | |
1961 | #endif | |
1962 | if (!needs_align) | |
1963 | { | |
1964 | /* FIXME. This needs to be machine independent. */ | |
1965 | if (temp >= 8) | |
1966 | align = 3; | |
1967 | else if (temp >= 4) | |
1968 | align = 2; | |
1969 | else if (temp >= 2) | |
1970 | align = 1; | |
1971 | else | |
1972 | align = 0; | |
1973 | ||
1974 | #ifdef OBJ_EVAX | |
1975 | /* FIXME: This needs to be done in a more general fashion. */ | |
1976 | align = 3; | |
1977 | #endif | |
1978 | ||
1979 | record_alignment(bss_seg, align); | |
1980 | } | |
1981 | ||
1982 | if (needs_align) | |
1983 | { | |
1984 | align = 0; | |
1985 | SKIP_WHITESPACE (); | |
1986 | if (*input_line_pointer != ',') | |
1987 | { | |
1988 | as_bad (_("Expected comma after size")); | |
1989 | ignore_rest_of_line (); | |
1990 | return; | |
1991 | } | |
1992 | input_line_pointer++; | |
1993 | SKIP_WHITESPACE (); | |
1994 | if (*input_line_pointer == '\n') | |
1995 | { | |
1996 | as_bad (_("Missing alignment")); | |
1997 | return; | |
1998 | } | |
1999 | align = get_absolute_expression (); | |
2000 | if (bytes_p) | |
2001 | { | |
2002 | /* Convert to a power of 2. */ | |
2003 | if (align != 0) | |
2004 | { | |
2005 | unsigned int i; | |
2006 | ||
2007 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
2008 | ; | |
2009 | if (align != 1) | |
2010 | as_bad (_("Alignment not a power of 2")); | |
2011 | align = i; | |
2012 | } | |
2013 | } | |
2014 | if (align > max_alignment) | |
2015 | { | |
2016 | align = max_alignment; | |
2017 | as_warn (_("Alignment too large: %d. assumed."), align); | |
2018 | } | |
2019 | else if (align < 0) | |
2020 | { | |
2021 | align = 0; | |
2022 | as_warn (_("Alignment negative. 0 assumed.")); | |
2023 | } | |
2024 | record_alignment (bss_seg, align); | |
2025 | } /* if needs align */ | |
2026 | else | |
2027 | { | |
2028 | /* Assume some objects may require alignment on some systems. */ | |
2029 | #if defined (TC_ALPHA) && ! defined (VMS) | |
2030 | if (temp > 1) | |
2031 | { | |
2032 | align = ffs (temp) - 1; | |
2033 | if (temp % (1 << align)) | |
2034 | abort (); | |
2035 | } | |
2036 | #endif | |
2037 | } | |
2038 | ||
2039 | *p = 0; | |
2040 | symbolP = symbol_find_or_make (name); | |
2041 | *p = c; | |
2042 | ||
2043 | if ( | |
2044 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
2045 | S_GET_OTHER (symbolP) == 0 && | |
2046 | S_GET_DESC (symbolP) == 0 && | |
2047 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
2048 | (S_GET_SEGMENT (symbolP) == bss_seg | |
2049 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) | |
2050 | { | |
2051 | char *pfrag; | |
2052 | ||
2053 | subseg_set (bss_seg, 1); | |
2054 | ||
2055 | if (align) | |
2056 | frag_align (align, 0, 0); | |
2057 | /* detach from old frag */ | |
2058 | if (S_GET_SEGMENT (symbolP) == bss_seg) | |
2059 | symbolP->sy_frag->fr_symbol = NULL; | |
2060 | ||
2061 | symbolP->sy_frag = frag_now; | |
2062 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, | |
2063 | (offsetT) temp, (char *) 0); | |
2064 | *pfrag = 0; | |
2065 | ||
2066 | S_SET_SEGMENT (symbolP, bss_seg); | |
2067 | ||
2068 | #ifdef OBJ_COFF | |
2069 | /* The symbol may already have been created with a preceding | |
2070 | ".globl" directive -- be careful not to step on storage class | |
2071 | in that case. Otherwise, set it to static. */ | |
2072 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) | |
2073 | { | |
2074 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
2075 | } | |
2076 | #endif /* OBJ_COFF */ | |
2077 | ||
2078 | #ifdef S_SET_SIZE | |
2079 | S_SET_SIZE (symbolP, temp); | |
2080 | #endif | |
2081 | } | |
2082 | else | |
2083 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
2084 | S_GET_NAME (symbolP)); | |
2085 | ||
2086 | subseg_set (current_seg, current_subseg); | |
2087 | ||
2088 | demand_empty_rest_of_line (); | |
2089 | } /* s_lcomm_internal() */ | |
2090 | ||
2091 | void | |
2092 | s_lcomm (needs_align) | |
2093 | int needs_align; | |
2094 | { | |
2095 | s_lcomm_internal (needs_align, 0); | |
2096 | } | |
2097 | ||
2098 | void s_lcomm_bytes (needs_align) | |
2099 | int needs_align; | |
2100 | { | |
2101 | s_lcomm_internal (needs_align, 1); | |
2102 | } | |
2103 | ||
2104 | void | |
2105 | s_lsym (ignore) | |
2106 | int ignore; | |
2107 | { | |
2108 | register char *name; | |
2109 | register char c; | |
2110 | register char *p; | |
2111 | expressionS exp; | |
2112 | register symbolS *symbolP; | |
2113 | ||
2114 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
2115 | name = input_line_pointer; | |
2116 | c = get_symbol_end (); | |
2117 | p = input_line_pointer; | |
2118 | *p = c; | |
2119 | SKIP_WHITESPACE (); | |
2120 | if (*input_line_pointer != ',') | |
2121 | { | |
2122 | *p = 0; | |
2123 | as_bad (_("Expected comma after name \"%s\""), name); | |
2124 | *p = c; | |
2125 | ignore_rest_of_line (); | |
2126 | return; | |
2127 | } | |
2128 | input_line_pointer++; | |
2129 | expression (&exp); | |
2130 | if (exp.X_op != O_constant | |
2131 | && exp.X_op != O_register) | |
2132 | { | |
2133 | as_bad (_("bad expression")); | |
2134 | ignore_rest_of_line (); | |
2135 | return; | |
2136 | } | |
2137 | *p = 0; | |
2138 | symbolP = symbol_find_or_make (name); | |
2139 | ||
2140 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && | |
2141 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
2142 | those fields, and I can't see when they'd ever be tripped. I | |
2143 | don't think I understand why they were here so I may have | |
2144 | introduced a bug. As recently as 1.37 didn't have this test | |
2145 | anyway. xoxorich. */ | |
2146 | ||
2147 | if (S_GET_SEGMENT (symbolP) == undefined_section | |
2148 | && S_GET_VALUE (symbolP) == 0) | |
2149 | { | |
2150 | /* The name might be an undefined .global symbol; be sure to | |
2151 | keep the "external" bit. */ | |
2152 | S_SET_SEGMENT (symbolP, | |
2153 | (exp.X_op == O_constant | |
2154 | ? absolute_section | |
2155 | : reg_section)); | |
2156 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
2157 | } | |
2158 | else | |
2159 | { | |
2160 | as_bad (_("Symbol %s already defined"), name); | |
2161 | } | |
2162 | *p = c; | |
2163 | demand_empty_rest_of_line (); | |
2164 | } /* s_lsym() */ | |
2165 | ||
2166 | /* Read a line into an sb. */ | |
2167 | ||
2168 | static int | |
2169 | get_line_sb (line) | |
2170 | sb *line; | |
2171 | { | |
2172 | char quote1, quote2, inquote; | |
2173 | ||
2174 | if (input_line_pointer[-1] == '\n') | |
2175 | bump_line_counters (); | |
2176 | ||
2177 | if (input_line_pointer >= buffer_limit) | |
2178 | { | |
2179 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2180 | if (buffer_limit == 0) | |
2181 | return 0; | |
2182 | } | |
2183 | ||
2184 | /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this | |
2185 | code needs to be changed. */ | |
2186 | if (! flag_m68k_mri) | |
2187 | quote1 = '"'; | |
2188 | else | |
2189 | quote1 = '\0'; | |
2190 | ||
2191 | quote2 = '\0'; | |
2192 | if (flag_m68k_mri) | |
2193 | quote2 = '\''; | |
2194 | #ifdef LEX_IS_STRINGQUOTE | |
2195 | quote2 = '\''; | |
2196 | #endif | |
2197 | ||
2198 | inquote = '\0'; | |
2199 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
2200 | || (inquote != '\0' && *input_line_pointer != '\n')) | |
2201 | { | |
2202 | if (inquote == *input_line_pointer) | |
2203 | inquote = '\0'; | |
2204 | else if (inquote == '\0') | |
2205 | { | |
2206 | if (*input_line_pointer == quote1) | |
2207 | inquote = quote1; | |
2208 | else if (*input_line_pointer == quote2) | |
2209 | inquote = quote2; | |
2210 | } | |
2211 | sb_add_char (line, *input_line_pointer++); | |
2212 | } | |
2213 | while (input_line_pointer < buffer_limit | |
2214 | && is_end_of_line[(unsigned char) *input_line_pointer]) | |
2215 | { | |
2216 | if (input_line_pointer[-1] == '\n') | |
2217 | bump_line_counters (); | |
2218 | ++input_line_pointer; | |
2219 | } | |
2220 | return 1; | |
2221 | } | |
2222 | ||
2223 | /* Define a macro. This is an interface to macro.c, which is shared | |
2224 | between gas and gasp. */ | |
2225 | ||
2226 | void | |
2227 | s_macro (ignore) | |
2228 | int ignore; | |
2229 | { | |
2230 | char *file; | |
2231 | unsigned int line; | |
2232 | sb s; | |
2233 | sb label; | |
2234 | const char *err; | |
2235 | const char *name; | |
2236 | ||
2237 | as_where (&file, &line); | |
2238 | ||
2239 | sb_new (&s); | |
2240 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
2241 | sb_add_char (&s, *input_line_pointer++); | |
2242 | ||
2243 | sb_new (&label); | |
2244 | if (line_label != NULL) | |
2245 | sb_add_string (&label, S_GET_NAME (line_label)); | |
2246 | ||
2247 | err = define_macro (0, &s, &label, get_line_sb, &name); | |
2248 | if (err != NULL) | |
2249 | as_bad_where (file, line, "%s", err); | |
2250 | else | |
2251 | { | |
2252 | if (line_label != NULL) | |
2253 | { | |
2254 | S_SET_SEGMENT (line_label, undefined_section); | |
2255 | S_SET_VALUE (line_label, 0); | |
2256 | line_label->sy_frag = &zero_address_frag; | |
2257 | } | |
2258 | ||
2259 | if (((flag_m68k_mri | |
2260 | #ifdef NO_PSEUDO_DOT | |
2261 | || 1 | |
2262 | #endif | |
2263 | ) | |
2264 | && hash_find (po_hash, name) != NULL) | |
2265 | || (! flag_m68k_mri | |
2266 | && *name == '.' | |
2267 | && hash_find (po_hash, name + 1) != NULL)) | |
2268 | as_warn (_("attempt to redefine pseudo-op `%s' ignored"), | |
2269 | name); | |
2270 | } | |
2271 | ||
2272 | sb_kill (&s); | |
2273 | } | |
2274 | ||
2275 | /* Handle the .mexit pseudo-op, which immediately exits a macro | |
2276 | expansion. */ | |
2277 | ||
2278 | void | |
2279 | s_mexit (ignore) | |
2280 | int ignore; | |
2281 | { | |
2282 | cond_exit_macro (macro_nest); | |
2283 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2284 | } | |
2285 | ||
2286 | /* Switch in and out of MRI mode. */ | |
2287 | ||
2288 | void | |
2289 | s_mri (ignore) | |
2290 | int ignore; | |
2291 | { | |
2292 | int on, old_flag; | |
2293 | ||
2294 | on = get_absolute_expression (); | |
2295 | old_flag = flag_mri; | |
2296 | if (on != 0) | |
2297 | { | |
2298 | flag_mri = 1; | |
2299 | #ifdef TC_M68K | |
2300 | flag_m68k_mri = 1; | |
2301 | #endif | |
2302 | macro_mri_mode (1); | |
2303 | } | |
2304 | else | |
2305 | { | |
2306 | flag_mri = 0; | |
2307 | flag_m68k_mri = 0; | |
2308 | macro_mri_mode (0); | |
2309 | } | |
2310 | ||
2311 | /* Operator precedence changes in m68k MRI mode, so we need to | |
2312 | update the operator rankings. */ | |
2313 | expr_set_precedence (); | |
2314 | ||
2315 | #ifdef MRI_MODE_CHANGE | |
2316 | if (on != old_flag) | |
2317 | MRI_MODE_CHANGE (on); | |
2318 | #endif | |
2319 | ||
2320 | demand_empty_rest_of_line (); | |
2321 | } | |
2322 | ||
2323 | /* Handle changing the location counter. */ | |
2324 | ||
2325 | static void | |
2326 | do_org (segment, exp, fill) | |
2327 | segT segment; | |
2328 | expressionS *exp; | |
2329 | int fill; | |
2330 | { | |
2331 | if (segment != now_seg && segment != absolute_section) | |
2332 | as_bad (_("invalid segment \"%s\"; segment \"%s\" assumed"), | |
2333 | segment_name (segment), segment_name (now_seg)); | |
2334 | ||
2335 | if (now_seg == absolute_section) | |
2336 | { | |
2337 | if (fill != 0) | |
2338 | as_warn (_("ignoring fill value in absolute section")); | |
2339 | if (exp->X_op != O_constant) | |
2340 | { | |
2341 | as_bad (_("only constant offsets supported in absolute section")); | |
2342 | exp->X_add_number = 0; | |
2343 | } | |
2344 | abs_section_offset = exp->X_add_number; | |
2345 | } | |
2346 | else | |
2347 | { | |
2348 | char *p; | |
2349 | ||
2350 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, | |
2351 | exp->X_add_number, (char *) NULL); | |
2352 | *p = fill; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | void | |
2357 | s_org (ignore) | |
2358 | int ignore; | |
2359 | { | |
2360 | register segT segment; | |
2361 | expressionS exp; | |
2362 | register long temp_fill; | |
2363 | ||
2364 | #ifdef md_flush_pending_output | |
2365 | md_flush_pending_output (); | |
2366 | #endif | |
2367 | ||
2368 | /* The m68k MRI assembler has a different meaning for .org. It | |
2369 | means to create an absolute section at a given address. We can't | |
2370 | support that--use a linker script instead. */ | |
2371 | if (flag_m68k_mri) | |
2372 | { | |
2373 | as_bad (_("MRI style ORG pseudo-op not supported")); | |
2374 | ignore_rest_of_line (); | |
2375 | return; | |
2376 | } | |
2377 | ||
2378 | /* Don't believe the documentation of BSD 4.2 AS. There is no such | |
2379 | thing as a sub-segment-relative origin. Any absolute origin is | |
2380 | given a warning, then assumed to be segment-relative. Any | |
2381 | segmented origin expression ("foo+42") had better be in the right | |
2382 | segment or the .org is ignored. | |
2383 | ||
2384 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
2385 | we never know sub-segment sizes when we are reading code. BSD | |
2386 | will crash trying to emit negative numbers of filler bytes in | |
2387 | certain .orgs. We don't crash, but see as-write for that code. | |
2388 | ||
2389 | Don't make frag if need_pass_2==1. */ | |
2390 | segment = get_known_segmented_expression (&exp); | |
2391 | if (*input_line_pointer == ',') | |
2392 | { | |
2393 | input_line_pointer++; | |
2394 | temp_fill = get_absolute_expression (); | |
2395 | } | |
2396 | else | |
2397 | temp_fill = 0; | |
2398 | ||
2399 | if (!need_pass_2) | |
2400 | do_org (segment, &exp, temp_fill); | |
2401 | ||
2402 | demand_empty_rest_of_line (); | |
2403 | } /* s_org() */ | |
2404 | ||
2405 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be | |
2406 | called by the obj-format routine which handles section changing | |
2407 | when in MRI mode. It will create a new section, and return it. It | |
2408 | will set *TYPE to the section type: one of 'C' (code), 'D' (data), | |
2409 | 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the | |
2410 | flags will be set in the section. */ | |
2411 | ||
2412 | void | |
2413 | s_mri_sect (type) | |
2414 | char *type; | |
2415 | { | |
2416 | #ifdef TC_M68K | |
2417 | ||
2418 | char *name; | |
2419 | char c; | |
2420 | segT seg; | |
2421 | ||
2422 | SKIP_WHITESPACE (); | |
2423 | ||
2424 | name = input_line_pointer; | |
2425 | if (! isdigit ((unsigned char) *name)) | |
2426 | c = get_symbol_end (); | |
2427 | else | |
2428 | { | |
2429 | do | |
2430 | { | |
2431 | ++input_line_pointer; | |
2432 | } | |
2433 | while (isdigit ((unsigned char) *input_line_pointer)); | |
2434 | c = *input_line_pointer; | |
2435 | *input_line_pointer = '\0'; | |
2436 | } | |
2437 | ||
2438 | name = xstrdup (name); | |
2439 | ||
2440 | *input_line_pointer = c; | |
2441 | ||
2442 | seg = subseg_new (name, 0); | |
2443 | ||
2444 | if (*input_line_pointer == ',') | |
2445 | { | |
2446 | int align; | |
2447 | ||
2448 | ++input_line_pointer; | |
2449 | align = get_absolute_expression (); | |
2450 | record_alignment (seg, align); | |
2451 | } | |
2452 | ||
2453 | *type = 'C'; | |
2454 | if (*input_line_pointer == ',') | |
2455 | { | |
2456 | c = *++input_line_pointer; | |
2457 | c = toupper ((unsigned char) c); | |
2458 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') | |
2459 | *type = c; | |
2460 | else | |
2461 | as_bad (_("unrecognized section type")); | |
2462 | ++input_line_pointer; | |
2463 | ||
2464 | #ifdef BFD_ASSEMBLER | |
2465 | { | |
2466 | flagword flags; | |
2467 | ||
2468 | flags = SEC_NO_FLAGS; | |
2469 | if (*type == 'C') | |
2470 | flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE; | |
2471 | else if (*type == 'D' || *type == 'M') | |
2472 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA; | |
2473 | else if (*type == 'R') | |
2474 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM; | |
2475 | if (flags != SEC_NO_FLAGS) | |
2476 | { | |
2477 | if (! bfd_set_section_flags (stdoutput, seg, flags)) | |
2478 | as_warn (_("error setting flags for \"%s\": %s"), | |
2479 | bfd_section_name (stdoutput, seg), | |
2480 | bfd_errmsg (bfd_get_error ())); | |
2481 | } | |
2482 | } | |
2483 | #endif | |
2484 | } | |
2485 | ||
2486 | /* Ignore the HP type. */ | |
2487 | if (*input_line_pointer == ',') | |
2488 | input_line_pointer += 2; | |
2489 | ||
2490 | demand_empty_rest_of_line (); | |
2491 | ||
2492 | #else /* ! TC_M68K */ | |
2493 | #ifdef TC_I960 | |
2494 | ||
2495 | char *name; | |
2496 | char c; | |
2497 | segT seg; | |
2498 | ||
2499 | SKIP_WHITESPACE (); | |
2500 | ||
2501 | name = input_line_pointer; | |
2502 | c = get_symbol_end (); | |
2503 | ||
2504 | name = xstrdup (name); | |
2505 | ||
2506 | *input_line_pointer = c; | |
2507 | ||
2508 | seg = subseg_new (name, 0); | |
2509 | ||
2510 | if (*input_line_pointer != ',') | |
2511 | *type = 'C'; | |
2512 | else | |
2513 | { | |
2514 | char *sectype; | |
2515 | ||
2516 | ++input_line_pointer; | |
2517 | SKIP_WHITESPACE (); | |
2518 | sectype = input_line_pointer; | |
2519 | c = get_symbol_end (); | |
2520 | if (*sectype == '\0') | |
2521 | *type = 'C'; | |
2522 | else if (strcasecmp (sectype, "text") == 0) | |
2523 | *type = 'C'; | |
2524 | else if (strcasecmp (sectype, "data") == 0) | |
2525 | *type = 'D'; | |
2526 | else if (strcasecmp (sectype, "romdata") == 0) | |
2527 | *type = 'R'; | |
2528 | else | |
2529 | as_warn (_("unrecognized section type `%s'"), sectype); | |
2530 | *input_line_pointer = c; | |
2531 | } | |
2532 | ||
2533 | if (*input_line_pointer == ',') | |
2534 | { | |
2535 | char *seccmd; | |
2536 | ||
2537 | ++input_line_pointer; | |
2538 | SKIP_WHITESPACE (); | |
2539 | seccmd = input_line_pointer; | |
2540 | c = get_symbol_end (); | |
2541 | if (strcasecmp (seccmd, "absolute") == 0) | |
2542 | { | |
2543 | as_bad (_("absolute sections are not supported")); | |
2544 | *input_line_pointer = c; | |
2545 | ignore_rest_of_line (); | |
2546 | return; | |
2547 | } | |
2548 | else if (strcasecmp (seccmd, "align") == 0) | |
2549 | { | |
2550 | int align; | |
2551 | ||
2552 | *input_line_pointer = c; | |
2553 | align = get_absolute_expression (); | |
2554 | record_alignment (seg, align); | |
2555 | } | |
2556 | else | |
2557 | { | |
2558 | as_warn (_("unrecognized section command `%s'"), seccmd); | |
2559 | *input_line_pointer = c; | |
2560 | } | |
2561 | } | |
2562 | ||
2563 | demand_empty_rest_of_line (); | |
2564 | ||
2565 | #else /* ! TC_I960 */ | |
2566 | /* The MRI assembler seems to use different forms of .sect for | |
2567 | different targets. */ | |
2568 | as_bad ("MRI mode not supported for this target"); | |
2569 | ignore_rest_of_line (); | |
2570 | #endif /* ! TC_I960 */ | |
2571 | #endif /* ! TC_M68K */ | |
2572 | } | |
2573 | ||
2574 | /* Handle the .print pseudo-op. */ | |
2575 | ||
2576 | void | |
2577 | s_print (ignore) | |
2578 | int ignore; | |
2579 | { | |
2580 | char *s; | |
2581 | int len; | |
2582 | ||
2583 | s = demand_copy_C_string (&len); | |
2584 | printf ("%s\n", s); | |
2585 | demand_empty_rest_of_line (); | |
2586 | } | |
2587 | ||
2588 | /* Handle the .purgem pseudo-op. */ | |
2589 | ||
2590 | void | |
2591 | s_purgem (ignore) | |
2592 | int ignore; | |
2593 | { | |
2594 | if (is_it_end_of_statement ()) | |
2595 | { | |
2596 | demand_empty_rest_of_line (); | |
2597 | return; | |
2598 | } | |
2599 | ||
2600 | do | |
2601 | { | |
2602 | char *name; | |
2603 | char c; | |
2604 | ||
2605 | SKIP_WHITESPACE (); | |
2606 | name = input_line_pointer; | |
2607 | c = get_symbol_end (); | |
2608 | delete_macro (name); | |
2609 | *input_line_pointer = c; | |
2610 | SKIP_WHITESPACE (); | |
2611 | } | |
2612 | while (*input_line_pointer++ == ','); | |
2613 | ||
2614 | --input_line_pointer; | |
2615 | demand_empty_rest_of_line (); | |
2616 | } | |
2617 | ||
2618 | /* Handle the .rept pseudo-op. */ | |
2619 | ||
2620 | void | |
2621 | s_rept (ignore) | |
2622 | int ignore; | |
2623 | { | |
2624 | int count; | |
2625 | sb one; | |
2626 | sb many; | |
2627 | ||
2628 | count = get_absolute_expression (); | |
2629 | ||
2630 | sb_new (&one); | |
2631 | if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb)) | |
2632 | { | |
2633 | as_bad (_("rept without endr")); | |
2634 | return; | |
2635 | } | |
2636 | ||
2637 | sb_new (&many); | |
2638 | while (count-- > 0) | |
2639 | sb_add_sb (&many, &one); | |
2640 | ||
2641 | sb_kill (&one); | |
2642 | ||
2643 | input_scrub_include_sb (&many, input_line_pointer); | |
2644 | sb_kill (&many); | |
2645 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2646 | } | |
2647 | ||
2648 | /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then | |
2649 | this is .equiv, and it is an error if the symbol is already | |
2650 | defined. */ | |
2651 | ||
2652 | void | |
2653 | s_set (equiv) | |
2654 | int equiv; | |
2655 | { | |
2656 | register char *name; | |
2657 | register char delim; | |
2658 | register char *end_name; | |
2659 | register symbolS *symbolP; | |
2660 | ||
2661 | /* | |
2662 | * Especial apologies for the random logic: | |
2663 | * this just grew, and could be parsed much more simply! | |
2664 | * Dean in haste. | |
2665 | */ | |
2666 | name = input_line_pointer; | |
2667 | delim = get_symbol_end (); | |
2668 | end_name = input_line_pointer; | |
2669 | *end_name = delim; | |
2670 | SKIP_WHITESPACE (); | |
2671 | ||
2672 | if (*input_line_pointer != ',') | |
2673 | { | |
2674 | *end_name = 0; | |
2675 | as_bad (_("Expected comma after name \"%s\""), name); | |
2676 | *end_name = delim; | |
2677 | ignore_rest_of_line (); | |
2678 | return; | |
2679 | } | |
2680 | ||
2681 | input_line_pointer++; | |
2682 | *end_name = 0; | |
2683 | ||
2684 | if (name[0] == '.' && name[1] == '\0') | |
2685 | { | |
2686 | /* Turn '. = mumble' into a .org mumble */ | |
2687 | register segT segment; | |
2688 | expressionS exp; | |
2689 | ||
2690 | segment = get_known_segmented_expression (&exp); | |
2691 | ||
2692 | if (!need_pass_2) | |
2693 | do_org (segment, &exp, 0); | |
2694 | ||
2695 | *end_name = delim; | |
2696 | return; | |
2697 | } | |
2698 | ||
2699 | if ((symbolP = symbol_find (name)) == NULL | |
2700 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
2701 | { | |
2702 | #ifndef NO_LISTING | |
2703 | /* When doing symbol listings, play games with dummy fragments living | |
2704 | outside the normal fragment chain to record the file and line info | |
2705 | for this symbol. */ | |
2706 | if (listing & LISTING_SYMBOLS) | |
2707 | { | |
2708 | extern struct list_info_struct *listing_tail; | |
2709 | fragS *dummy_frag = (fragS *) xmalloc (sizeof(fragS)); | |
2710 | memset (dummy_frag, 0, sizeof(fragS)); | |
2711 | dummy_frag->fr_type = rs_fill; | |
2712 | dummy_frag->line = listing_tail; | |
2713 | symbolP = symbol_new (name, undefined_section, 0, dummy_frag); | |
2714 | dummy_frag->fr_symbol = symbolP; | |
2715 | } | |
2716 | else | |
2717 | #endif | |
2718 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); | |
2719 | ||
2720 | #ifdef OBJ_COFF | |
2721 | /* "set" symbols are local unless otherwise specified. */ | |
2722 | SF_SET_LOCAL (symbolP); | |
2723 | #endif /* OBJ_COFF */ | |
2724 | ||
2725 | } /* make a new symbol */ | |
2726 | ||
2727 | symbol_table_insert (symbolP); | |
2728 | ||
2729 | *end_name = delim; | |
2730 | ||
2731 | if (equiv | |
2732 | && S_IS_DEFINED (symbolP) | |
2733 | && S_GET_SEGMENT (symbolP) != reg_section) | |
2734 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
2735 | ||
2736 | pseudo_set (symbolP); | |
2737 | demand_empty_rest_of_line (); | |
2738 | } /* s_set() */ | |
2739 | ||
2740 | void | |
2741 | s_space (mult) | |
2742 | int mult; | |
2743 | { | |
2744 | expressionS exp; | |
2745 | expressionS val; | |
2746 | char *p = 0; | |
2747 | char *stop = NULL; | |
2748 | char stopc; | |
2749 | int bytes; | |
2750 | ||
2751 | #ifdef md_flush_pending_output | |
2752 | md_flush_pending_output (); | |
2753 | #endif | |
2754 | ||
2755 | if (flag_mri) | |
2756 | stop = mri_comment_field (&stopc); | |
2757 | ||
2758 | /* In m68k MRI mode, we need to align to a word boundary, unless | |
2759 | this is ds.b. */ | |
2760 | if (flag_m68k_mri && mult > 1) | |
2761 | { | |
2762 | if (now_seg == absolute_section) | |
2763 | { | |
2764 | abs_section_offset += abs_section_offset & 1; | |
2765 | if (line_label != NULL) | |
2766 | S_SET_VALUE (line_label, abs_section_offset); | |
2767 | } | |
2768 | else if (mri_common_symbol != NULL) | |
2769 | { | |
2770 | valueT val; | |
2771 | ||
2772 | val = S_GET_VALUE (mri_common_symbol); | |
2773 | if ((val & 1) != 0) | |
2774 | { | |
2775 | S_SET_VALUE (mri_common_symbol, val + 1); | |
2776 | if (line_label != NULL) | |
2777 | { | |
2778 | know (line_label->sy_value.X_op == O_symbol); | |
2779 | know (line_label->sy_value.X_add_symbol == mri_common_symbol); | |
2780 | line_label->sy_value.X_add_number += 1; | |
2781 | } | |
2782 | } | |
2783 | } | |
2784 | else | |
2785 | { | |
2786 | do_align (1, (char *) NULL, 0, 0); | |
2787 | if (line_label != NULL) | |
2788 | { | |
2789 | line_label->sy_frag = frag_now; | |
2790 | S_SET_VALUE (line_label, frag_now_fix ()); | |
2791 | } | |
2792 | } | |
2793 | } | |
2794 | ||
2795 | bytes = mult; | |
2796 | ||
2797 | expression (&exp); | |
2798 | ||
2799 | SKIP_WHITESPACE (); | |
2800 | if (*input_line_pointer == ',') | |
2801 | { | |
2802 | ++input_line_pointer; | |
2803 | expression (&val); | |
2804 | } | |
2805 | else | |
2806 | { | |
2807 | val.X_op = O_constant; | |
2808 | val.X_add_number = 0; | |
2809 | } | |
2810 | ||
2811 | if (val.X_op != O_constant | |
2812 | || val.X_add_number < - 0x80 | |
2813 | || val.X_add_number > 0xff | |
2814 | || (mult != 0 && mult != 1 && val.X_add_number != 0)) | |
2815 | { | |
2816 | if (exp.X_op != O_constant) | |
2817 | as_bad (_("Unsupported variable size or fill value")); | |
2818 | else | |
2819 | { | |
2820 | offsetT i; | |
2821 | ||
2822 | if (mult == 0) | |
2823 | mult = 1; | |
2824 | bytes = mult * exp.X_add_number; | |
2825 | for (i = 0; i < exp.X_add_number; i++) | |
2826 | emit_expr (&val, mult); | |
2827 | } | |
2828 | } | |
2829 | else | |
2830 | { | |
2831 | if (exp.X_op == O_constant) | |
2832 | { | |
2833 | long repeat; | |
2834 | ||
2835 | repeat = exp.X_add_number; | |
2836 | if (mult) | |
2837 | repeat *= mult; | |
2838 | bytes = repeat; | |
2839 | if (repeat <= 0) | |
2840 | { | |
2841 | if (! flag_mri) | |
2842 | as_warn (_(".space repeat count is zero, ignored")); | |
2843 | else if (repeat < 0) | |
2844 | as_warn (_(".space repeat count is negative, ignored")); | |
2845 | goto getout; | |
2846 | } | |
2847 | ||
2848 | /* If we are in the absolute section, just bump the offset. */ | |
2849 | if (now_seg == absolute_section) | |
2850 | { | |
2851 | abs_section_offset += repeat; | |
2852 | goto getout; | |
2853 | } | |
2854 | ||
2855 | /* If we are secretly in an MRI common section, then | |
2856 | creating space just increases the size of the common | |
2857 | symbol. */ | |
2858 | if (mri_common_symbol != NULL) | |
2859 | { | |
2860 | S_SET_VALUE (mri_common_symbol, | |
2861 | S_GET_VALUE (mri_common_symbol) + repeat); | |
2862 | goto getout; | |
2863 | } | |
2864 | ||
2865 | if (!need_pass_2) | |
2866 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
2867 | (offsetT) repeat, (char *) 0); | |
2868 | } | |
2869 | else | |
2870 | { | |
2871 | if (now_seg == absolute_section) | |
2872 | { | |
2873 | as_bad (_("space allocation too complex in absolute section")); | |
2874 | subseg_set (text_section, 0); | |
2875 | } | |
2876 | if (mri_common_symbol != NULL) | |
2877 | { | |
2878 | as_bad (_("space allocation too complex in common section")); | |
2879 | mri_common_symbol = NULL; | |
2880 | } | |
2881 | if (!need_pass_2) | |
2882 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, | |
2883 | make_expr_symbol (&exp), (offsetT) 0, (char *) 0); | |
2884 | } | |
2885 | ||
2886 | if (p) | |
2887 | *p = val.X_add_number; | |
2888 | } | |
2889 | ||
2890 | getout: | |
2891 | ||
2892 | /* In MRI mode, after an odd number of bytes, we must align to an | |
2893 | even word boundary, unless the next instruction is a dc.b, ds.b | |
2894 | or dcb.b. */ | |
2895 | if (flag_mri && (bytes & 1) != 0) | |
2896 | mri_pending_align = 1; | |
2897 | ||
2898 | demand_empty_rest_of_line (); | |
2899 | ||
2900 | if (flag_mri) | |
2901 | mri_comment_end (stop, stopc); | |
2902 | } | |
2903 | ||
2904 | /* This is like s_space, but the value is a floating point number with | |
2905 | the given precision. This is for the MRI dcb.s pseudo-op and | |
2906 | friends. */ | |
2907 | ||
2908 | void | |
2909 | s_float_space (float_type) | |
2910 | int float_type; | |
2911 | { | |
2912 | offsetT count; | |
2913 | int flen; | |
2914 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
2915 | char *stop = NULL; | |
2916 | char stopc; | |
2917 | ||
2918 | if (flag_mri) | |
2919 | stop = mri_comment_field (&stopc); | |
2920 | ||
2921 | count = get_absolute_expression (); | |
2922 | ||
2923 | SKIP_WHITESPACE (); | |
2924 | if (*input_line_pointer != ',') | |
2925 | { | |
2926 | as_bad (_("missing value")); | |
2927 | ignore_rest_of_line (); | |
2928 | if (flag_mri) | |
2929 | mri_comment_end (stop, stopc); | |
2930 | return; | |
2931 | } | |
2932 | ||
2933 | ++input_line_pointer; | |
2934 | ||
2935 | SKIP_WHITESPACE (); | |
2936 | ||
2937 | /* Skip any 0{letter} that may be present. Don't even check if the | |
2938 | * letter is legal. */ | |
2939 | if (input_line_pointer[0] == '0' | |
2940 | && isalpha ((unsigned char) input_line_pointer[1])) | |
2941 | input_line_pointer += 2; | |
2942 | ||
2943 | /* Accept :xxxx, where the x's are hex digits, for a floating point | |
2944 | with the exact digits specified. */ | |
2945 | if (input_line_pointer[0] == ':') | |
2946 | { | |
2947 | flen = hex_float (float_type, temp); | |
2948 | if (flen < 0) | |
2949 | { | |
2950 | ignore_rest_of_line (); | |
2951 | if (flag_mri) | |
2952 | mri_comment_end (stop, stopc); | |
2953 | return; | |
2954 | } | |
2955 | } | |
2956 | else | |
2957 | { | |
2958 | char *err; | |
2959 | ||
2960 | err = md_atof (float_type, temp, &flen); | |
2961 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
2962 | know (flen > 0); | |
2963 | if (err) | |
2964 | { | |
2965 | as_bad (_("Bad floating literal: %s"), err); | |
2966 | ignore_rest_of_line (); | |
2967 | if (flag_mri) | |
2968 | mri_comment_end (stop, stopc); | |
2969 | return; | |
2970 | } | |
2971 | } | |
2972 | ||
2973 | while (--count >= 0) | |
2974 | { | |
2975 | char *p; | |
2976 | ||
2977 | p = frag_more (flen); | |
2978 | memcpy (p, temp, (unsigned int) flen); | |
2979 | } | |
2980 | ||
2981 | demand_empty_rest_of_line (); | |
2982 | ||
2983 | if (flag_mri) | |
2984 | mri_comment_end (stop, stopc); | |
2985 | } | |
2986 | ||
2987 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ | |
2988 | ||
2989 | void | |
2990 | s_struct (ignore) | |
2991 | int ignore; | |
2992 | { | |
2993 | char *stop = NULL; | |
2994 | char stopc; | |
2995 | ||
2996 | if (flag_mri) | |
2997 | stop = mri_comment_field (&stopc); | |
2998 | abs_section_offset = get_absolute_expression (); | |
2999 | subseg_set (absolute_section, 0); | |
3000 | demand_empty_rest_of_line (); | |
3001 | if (flag_mri) | |
3002 | mri_comment_end (stop, stopc); | |
3003 | } | |
3004 | ||
3005 | void | |
3006 | s_text (ignore) | |
3007 | int ignore; | |
3008 | { | |
3009 | register int temp; | |
3010 | ||
3011 | temp = get_absolute_expression (); | |
3012 | subseg_set (text_section, (subsegT) temp); | |
3013 | demand_empty_rest_of_line (); | |
3014 | #ifdef OBJ_VMS | |
3015 | const_flag &= ~IN_DEFAULT_SECTION; | |
3016 | #endif | |
3017 | } /* s_text() */ | |
3018 | \f | |
3019 | ||
3020 | void | |
3021 | demand_empty_rest_of_line () | |
3022 | { | |
3023 | SKIP_WHITESPACE (); | |
3024 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
3025 | { | |
3026 | input_line_pointer++; | |
3027 | } | |
3028 | else | |
3029 | { | |
3030 | ignore_rest_of_line (); | |
3031 | } | |
3032 | /* Return having already swallowed end-of-line. */ | |
3033 | } /* Return pointing just after end-of-line. */ | |
3034 | ||
3035 | void | |
3036 | ignore_rest_of_line () /* For suspect lines: gives warning. */ | |
3037 | { | |
3038 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
3039 | { | |
3040 | if (isprint ((unsigned char) *input_line_pointer)) | |
3041 | as_bad (_("Rest of line ignored. First ignored character is `%c'."), | |
3042 | *input_line_pointer); | |
3043 | else | |
3044 | as_bad (_("Rest of line ignored. First ignored character valued 0x%x."), | |
3045 | *input_line_pointer); | |
3046 | while (input_line_pointer < buffer_limit | |
3047 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3048 | { | |
3049 | input_line_pointer++; | |
3050 | } | |
3051 | } | |
3052 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3053 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3054 | } | |
3055 | ||
3056 | void | |
3057 | discard_rest_of_line () | |
3058 | { | |
3059 | while (input_line_pointer < buffer_limit | |
3060 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3061 | { | |
3062 | input_line_pointer++; | |
3063 | } | |
3064 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3065 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3066 | } | |
3067 | ||
3068 | /* | |
3069 | * pseudo_set() | |
3070 | * | |
3071 | * In: Pointer to a symbol. | |
3072 | * Input_line_pointer->expression. | |
3073 | * | |
3074 | * Out: Input_line_pointer->just after any whitespace after expression. | |
3075 | * Tried to set symbol to value of expression. | |
3076 | * Will change symbols type, value, and frag; | |
3077 | */ | |
3078 | void | |
3079 | pseudo_set (symbolP) | |
3080 | symbolS *symbolP; | |
3081 | { | |
3082 | expressionS exp; | |
3083 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3084 | int ext; | |
3085 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3086 | ||
3087 | know (symbolP); /* NULL pointer is logic error. */ | |
3088 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3089 | ext = S_IS_EXTERNAL (symbolP); | |
3090 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3091 | ||
3092 | (void) expression (&exp); | |
3093 | ||
3094 | if (exp.X_op == O_illegal) | |
3095 | as_bad (_("illegal expression; zero assumed")); | |
3096 | else if (exp.X_op == O_absent) | |
3097 | as_bad (_("missing expression; zero assumed")); | |
3098 | else if (exp.X_op == O_big) | |
3099 | { | |
3100 | if (exp.X_add_number > 0) | |
3101 | as_bad (_("bignum invalid; zero assumed")); | |
3102 | else | |
3103 | as_bad (_("floating point number invalid; zero assumed")); | |
3104 | } | |
3105 | else if (exp.X_op == O_subtract | |
3106 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
3107 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
3108 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
3109 | && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) | |
3110 | { | |
3111 | exp.X_op = O_constant; | |
3112 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
3113 | - S_GET_VALUE (exp.X_op_symbol)); | |
3114 | } | |
3115 | ||
3116 | switch (exp.X_op) | |
3117 | { | |
3118 | case O_illegal: | |
3119 | case O_absent: | |
3120 | case O_big: | |
3121 | exp.X_add_number = 0; | |
3122 | /* Fall through. */ | |
3123 | case O_constant: | |
3124 | S_SET_SEGMENT (symbolP, absolute_section); | |
3125 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3126 | if (ext) | |
3127 | S_SET_EXTERNAL (symbolP); | |
3128 | else | |
3129 | S_CLEAR_EXTERNAL (symbolP); | |
3130 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3131 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
3132 | if (exp.X_op != O_constant) | |
3133 | symbolP->sy_frag = &zero_address_frag; | |
3134 | break; | |
3135 | ||
3136 | case O_register: | |
3137 | S_SET_SEGMENT (symbolP, reg_section); | |
3138 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
3139 | symbolP->sy_frag = &zero_address_frag; | |
3140 | break; | |
3141 | ||
3142 | case O_symbol: | |
3143 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section | |
3144 | || exp.X_add_number != 0) | |
3145 | symbolP->sy_value = exp; | |
3146 | else | |
3147 | { | |
3148 | symbolS *s = exp.X_add_symbol; | |
3149 | ||
3150 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); | |
3151 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3152 | if (ext) | |
3153 | S_SET_EXTERNAL (symbolP); | |
3154 | else | |
3155 | S_CLEAR_EXTERNAL (symbolP); | |
3156 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3157 | S_SET_VALUE (symbolP, | |
3158 | exp.X_add_number + S_GET_VALUE (s)); | |
3159 | symbolP->sy_frag = s->sy_frag; | |
3160 | copy_symbol_attributes (symbolP, s); | |
3161 | } | |
3162 | break; | |
3163 | ||
3164 | default: | |
3165 | /* The value is some complex expression. | |
3166 | FIXME: Should we set the segment to anything? */ | |
3167 | symbolP->sy_value = exp; | |
3168 | break; | |
3169 | } | |
3170 | } | |
3171 | \f | |
3172 | /* | |
3173 | * cons() | |
3174 | * | |
3175 | * CONStruct more frag of .bytes, or .words etc. | |
3176 | * Should need_pass_2 be 1 then emit no frag(s). | |
3177 | * This understands EXPRESSIONS. | |
3178 | * | |
3179 | * Bug (?) | |
3180 | * | |
3181 | * This has a split personality. We use expression() to read the | |
3182 | * value. We can detect if the value won't fit in a byte or word. | |
3183 | * But we can't detect if expression() discarded significant digits | |
3184 | * in the case of a long. Not worth the crocks required to fix it. | |
3185 | */ | |
3186 | ||
3187 | /* Select a parser for cons expressions. */ | |
3188 | ||
3189 | /* Some targets need to parse the expression in various fancy ways. | |
3190 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
3191 | (for example, the HPPA does this). Otherwise, you can define | |
3192 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
3193 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
3194 | are defined, which is the normal case, then only simple expressions | |
3195 | are permitted. */ | |
3196 | ||
3197 | static void | |
3198 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3199 | ||
3200 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3201 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3202 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
3203 | static void | |
3204 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3205 | #endif | |
3206 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3207 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
3208 | static void | |
3209 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3210 | #endif | |
3211 | ||
3212 | /* If we haven't gotten one yet, just call expression. */ | |
3213 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3214 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
3215 | #endif | |
3216 | #endif | |
3217 | ||
3218 | /* worker to do .byte etc statements */ | |
3219 | /* clobbers input_line_pointer, checks */ | |
3220 | /* end-of-line. */ | |
3221 | static void | |
3222 | cons_worker (nbytes, rva) | |
3223 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
3224 | int rva; | |
3225 | { | |
3226 | int c; | |
3227 | expressionS exp; | |
3228 | char *stop = NULL; | |
3229 | char stopc; | |
3230 | ||
3231 | #ifdef md_flush_pending_output | |
3232 | md_flush_pending_output (); | |
3233 | #endif | |
3234 | ||
3235 | if (flag_mri) | |
3236 | stop = mri_comment_field (&stopc); | |
3237 | ||
3238 | if (is_it_end_of_statement ()) | |
3239 | { | |
3240 | demand_empty_rest_of_line (); | |
3241 | if (flag_mri) | |
3242 | mri_comment_end (stop, stopc); | |
3243 | return; | |
3244 | } | |
3245 | ||
3246 | #ifdef md_cons_align | |
3247 | md_cons_align (nbytes); | |
3248 | #endif | |
3249 | ||
3250 | c = 0; | |
3251 | do | |
3252 | { | |
3253 | if (flag_m68k_mri) | |
3254 | parse_mri_cons (&exp, (unsigned int) nbytes); | |
3255 | else | |
3256 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); | |
3257 | ||
3258 | if (rva) | |
3259 | { | |
3260 | if (exp.X_op == O_symbol) | |
3261 | exp.X_op = O_symbol_rva; | |
3262 | else | |
3263 | as_fatal (_("rva without symbol")); | |
3264 | } | |
3265 | emit_expr (&exp, (unsigned int) nbytes); | |
3266 | ++c; | |
3267 | } | |
3268 | while (*input_line_pointer++ == ','); | |
3269 | ||
3270 | /* In MRI mode, after an odd number of bytes, we must align to an | |
3271 | even word boundary, unless the next instruction is a dc.b, ds.b | |
3272 | or dcb.b. */ | |
3273 | if (flag_mri && nbytes == 1 && (c & 1) != 0) | |
3274 | mri_pending_align = 1; | |
3275 | ||
3276 | input_line_pointer--; /* Put terminator back into stream. */ | |
3277 | ||
3278 | demand_empty_rest_of_line (); | |
3279 | ||
3280 | if (flag_mri) | |
3281 | mri_comment_end (stop, stopc); | |
3282 | } | |
3283 | ||
3284 | ||
3285 | void | |
3286 | cons (size) | |
3287 | int size; | |
3288 | { | |
3289 | cons_worker (size, 0); | |
3290 | } | |
3291 | ||
3292 | void | |
3293 | s_rva (size) | |
3294 | int size; | |
3295 | { | |
3296 | cons_worker (size, 1); | |
3297 | } | |
3298 | ||
3299 | /* Put the contents of expression EXP into the object file using | |
3300 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
3301 | ||
3302 | void | |
3303 | emit_expr (exp, nbytes) | |
3304 | expressionS *exp; | |
3305 | unsigned int nbytes; | |
3306 | { | |
3307 | operatorT op; | |
3308 | register char *p; | |
3309 | valueT extra_digit = 0; | |
3310 | ||
3311 | /* Don't do anything if we are going to make another pass. */ | |
3312 | if (need_pass_2) | |
3313 | return; | |
3314 | ||
3315 | #ifndef NO_LISTING | |
3316 | #ifdef OBJ_ELF | |
3317 | /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will | |
3318 | appear as a four byte positive constant in the .line section, | |
3319 | followed by a 2 byte 0xffff. Look for that case here. */ | |
3320 | { | |
3321 | static int dwarf_line = -1; | |
3322 | ||
3323 | if (strcmp (segment_name (now_seg), ".line") != 0) | |
3324 | dwarf_line = -1; | |
3325 | else if (dwarf_line >= 0 | |
3326 | && nbytes == 2 | |
3327 | && exp->X_op == O_constant | |
3328 | && (exp->X_add_number == -1 || exp->X_add_number == 0xffff)) | |
3329 | listing_source_line ((unsigned int) dwarf_line); | |
3330 | else if (nbytes == 4 | |
3331 | && exp->X_op == O_constant | |
3332 | && exp->X_add_number >= 0) | |
3333 | dwarf_line = exp->X_add_number; | |
3334 | else | |
3335 | dwarf_line = -1; | |
3336 | } | |
3337 | ||
3338 | /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will | |
3339 | appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte | |
3340 | AT_sibling (0x12) followed by a four byte address of the sibling | |
3341 | followed by a 2 byte AT_name (0x38) followed by the name of the | |
3342 | file. We look for that case here. */ | |
3343 | { | |
3344 | static int dwarf_file = 0; | |
3345 | ||
3346 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
3347 | dwarf_file = 0; | |
3348 | else if (dwarf_file == 0 | |
3349 | && nbytes == 2 | |
3350 | && exp->X_op == O_constant | |
3351 | && exp->X_add_number == 0x11) | |
3352 | dwarf_file = 1; | |
3353 | else if (dwarf_file == 1 | |
3354 | && nbytes == 2 | |
3355 | && exp->X_op == O_constant | |
3356 | && exp->X_add_number == 0x12) | |
3357 | dwarf_file = 2; | |
3358 | else if (dwarf_file == 2 | |
3359 | && nbytes == 4) | |
3360 | dwarf_file = 3; | |
3361 | else if (dwarf_file == 3 | |
3362 | && nbytes == 2 | |
3363 | && exp->X_op == O_constant | |
3364 | && exp->X_add_number == 0x38) | |
3365 | dwarf_file = 4; | |
3366 | else | |
3367 | dwarf_file = 0; | |
3368 | ||
3369 | /* The variable dwarf_file_string tells stringer that the string | |
3370 | may be the name of the source file. */ | |
3371 | if (dwarf_file == 4) | |
3372 | dwarf_file_string = 1; | |
3373 | else | |
3374 | dwarf_file_string = 0; | |
3375 | } | |
3376 | #endif | |
3377 | #endif | |
3378 | ||
3379 | if (check_eh_frame (exp, &nbytes)) | |
3380 | return; | |
3381 | ||
3382 | op = exp->X_op; | |
3383 | ||
3384 | /* Allow `.word 0' in the absolute section. */ | |
3385 | if (now_seg == absolute_section) | |
3386 | { | |
3387 | if (op != O_constant || exp->X_add_number != 0) | |
3388 | as_bad (_("attempt to store value in absolute section")); | |
3389 | abs_section_offset += nbytes; | |
3390 | return; | |
3391 | } | |
3392 | ||
3393 | /* Handle a negative bignum. */ | |
3394 | if (op == O_uminus | |
3395 | && exp->X_add_number == 0 | |
3396 | && exp->X_add_symbol->sy_value.X_op == O_big | |
3397 | && exp->X_add_symbol->sy_value.X_add_number > 0) | |
3398 | { | |
3399 | int i; | |
3400 | unsigned long carry; | |
3401 | ||
3402 | exp = &exp->X_add_symbol->sy_value; | |
3403 | ||
3404 | /* Negate the bignum: one's complement each digit and add 1. */ | |
3405 | carry = 1; | |
3406 | for (i = 0; i < exp->X_add_number; i++) | |
3407 | { | |
3408 | unsigned long next; | |
3409 | ||
3410 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
3411 | & LITTLENUM_MASK) | |
3412 | + carry); | |
3413 | generic_bignum[i] = next & LITTLENUM_MASK; | |
3414 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
3415 | } | |
3416 | ||
3417 | /* We can ignore any carry out, because it will be handled by | |
3418 | extra_digit if it is needed. */ | |
3419 | ||
3420 | extra_digit = (valueT) -1; | |
3421 | op = O_big; | |
3422 | } | |
3423 | ||
3424 | if (op == O_absent || op == O_illegal) | |
3425 | { | |
3426 | as_warn (_("zero assumed for missing expression")); | |
3427 | exp->X_add_number = 0; | |
3428 | op = O_constant; | |
3429 | } | |
3430 | else if (op == O_big && exp->X_add_number <= 0) | |
3431 | { | |
3432 | as_bad (_("floating point number invalid; zero assumed")); | |
3433 | exp->X_add_number = 0; | |
3434 | op = O_constant; | |
3435 | } | |
3436 | else if (op == O_register) | |
3437 | { | |
3438 | as_warn (_("register value used as expression")); | |
3439 | op = O_constant; | |
3440 | } | |
3441 | ||
3442 | p = frag_more ((int) nbytes); | |
3443 | ||
3444 | #ifndef WORKING_DOT_WORD | |
3445 | /* If we have the difference of two symbols in a word, save it on | |
3446 | the broken_words list. See the code in write.c. */ | |
3447 | if (op == O_subtract && nbytes == 2) | |
3448 | { | |
3449 | struct broken_word *x; | |
3450 | ||
3451 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
3452 | x->next_broken_word = broken_words; | |
3453 | broken_words = x; | |
3454 | x->seg = now_seg; | |
3455 | x->subseg = now_subseg; | |
3456 | x->frag = frag_now; | |
3457 | x->word_goes_here = p; | |
3458 | x->dispfrag = 0; | |
3459 | x->add = exp->X_add_symbol; | |
3460 | x->sub = exp->X_op_symbol; | |
3461 | x->addnum = exp->X_add_number; | |
3462 | x->added = 0; | |
3463 | new_broken_words++; | |
3464 | return; | |
3465 | } | |
3466 | #endif | |
3467 | ||
3468 | /* If we have an integer, but the number of bytes is too large to | |
3469 | pass to md_number_to_chars, handle it as a bignum. */ | |
3470 | if (op == O_constant && nbytes > sizeof (valueT)) | |
3471 | { | |
3472 | valueT val; | |
3473 | int gencnt; | |
3474 | ||
3475 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
3476 | extra_digit = (valueT) -1; | |
3477 | val = (valueT) exp->X_add_number; | |
3478 | gencnt = 0; | |
3479 | do | |
3480 | { | |
3481 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
3482 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
3483 | ++gencnt; | |
3484 | } | |
3485 | while (val != 0); | |
3486 | op = exp->X_op = O_big; | |
3487 | exp->X_add_number = gencnt; | |
3488 | } | |
3489 | ||
3490 | if (op == O_constant) | |
3491 | { | |
3492 | register valueT get; | |
3493 | register valueT use; | |
3494 | register valueT mask; | |
3495 | valueT hibit; | |
3496 | register valueT unmask; | |
3497 | ||
3498 | /* JF << of >= number of bits in the object is undefined. In | |
3499 | particular SPARC (Sun 4) has problems */ | |
3500 | if (nbytes >= sizeof (valueT)) | |
3501 | { | |
3502 | mask = 0; | |
3503 | if (nbytes > sizeof (valueT)) | |
3504 | hibit = 0; | |
3505 | else | |
3506 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3507 | } | |
3508 | else | |
3509 | { | |
3510 | /* Don't store these bits. */ | |
3511 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); | |
3512 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3513 | } | |
3514 | ||
3515 | unmask = ~mask; /* Do store these bits. */ | |
3516 | ||
3517 | #ifdef NEVER | |
3518 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
3519 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
3520 | #endif | |
3521 | ||
3522 | get = exp->X_add_number; | |
3523 | use = get & unmask; | |
3524 | if ((get & mask) != 0 | |
3525 | && ((get & mask) != mask | |
3526 | || (get & hibit) == 0)) | |
3527 | { /* Leading bits contain both 0s & 1s. */ | |
3528 | as_warn (_("Value 0x%lx truncated to 0x%lx."), | |
3529 | (unsigned long) get, (unsigned long) use); | |
3530 | } | |
3531 | /* put bytes in right order. */ | |
3532 | md_number_to_chars (p, use, (int) nbytes); | |
3533 | } | |
3534 | else if (op == O_big) | |
3535 | { | |
3536 | unsigned int size; | |
3537 | LITTLENUM_TYPE *nums; | |
3538 | ||
3539 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
3540 | ||
3541 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
3542 | if (nbytes < size) | |
3543 | { | |
3544 | as_warn (_("Bignum truncated to %d bytes"), nbytes); | |
3545 | size = nbytes; | |
3546 | } | |
3547 | ||
3548 | if (target_big_endian) | |
3549 | { | |
3550 | while (nbytes > size) | |
3551 | { | |
3552 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3553 | nbytes -= CHARS_PER_LITTLENUM; | |
3554 | p += CHARS_PER_LITTLENUM; | |
3555 | } | |
3556 | ||
3557 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
3558 | while (size > 0) | |
3559 | { | |
3560 | --nums; | |
3561 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3562 | size -= CHARS_PER_LITTLENUM; | |
3563 | p += CHARS_PER_LITTLENUM; | |
3564 | } | |
3565 | } | |
3566 | else | |
3567 | { | |
3568 | nums = generic_bignum; | |
3569 | while (size > 0) | |
3570 | { | |
3571 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3572 | ++nums; | |
3573 | size -= CHARS_PER_LITTLENUM; | |
3574 | p += CHARS_PER_LITTLENUM; | |
3575 | nbytes -= CHARS_PER_LITTLENUM; | |
3576 | } | |
3577 | ||
3578 | while (nbytes > 0) | |
3579 | { | |
3580 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3581 | nbytes -= CHARS_PER_LITTLENUM; | |
3582 | p += CHARS_PER_LITTLENUM; | |
3583 | } | |
3584 | } | |
3585 | } | |
3586 | else | |
3587 | { | |
3588 | memset (p, 0, nbytes); | |
3589 | ||
3590 | /* Now we need to generate a fixS to record the symbol value. | |
3591 | This is easy for BFD. For other targets it can be more | |
3592 | complex. For very complex cases (currently, the HPPA and | |
3593 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
3594 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
3595 | the name of the reloc code that should be stored in the fixS. | |
3596 | If neither is defined, the code uses NO_RELOC if it is | |
3597 | defined, and otherwise uses 0. */ | |
3598 | ||
3599 | #ifdef BFD_ASSEMBLER | |
3600 | #ifdef TC_CONS_FIX_NEW | |
3601 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3602 | #else | |
3603 | { | |
3604 | bfd_reloc_code_real_type r; | |
3605 | ||
3606 | switch (nbytes) | |
3607 | { | |
3608 | case 1: | |
3609 | r = BFD_RELOC_8; | |
3610 | break; | |
3611 | case 2: | |
3612 | r = BFD_RELOC_16; | |
3613 | break; | |
3614 | case 4: | |
3615 | r = BFD_RELOC_32; | |
3616 | break; | |
3617 | case 8: | |
3618 | r = BFD_RELOC_64; | |
3619 | break; | |
3620 | default: | |
3621 | as_bad (_("unsupported BFD relocation size %u"), nbytes); | |
3622 | r = BFD_RELOC_32; | |
3623 | break; | |
3624 | } | |
3625 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, | |
3626 | 0, r); | |
3627 | } | |
3628 | #endif | |
3629 | #else | |
3630 | #ifdef TC_CONS_FIX_NEW | |
3631 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3632 | #else | |
3633 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
3634 | it is defined, otherwise use NO_RELOC if it is defined, | |
3635 | otherwise use 0. */ | |
3636 | #ifndef TC_CONS_RELOC | |
3637 | #ifdef NO_RELOC | |
3638 | #define TC_CONS_RELOC NO_RELOC | |
3639 | #else | |
3640 | #define TC_CONS_RELOC 0 | |
3641 | #endif | |
3642 | #endif | |
3643 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, | |
3644 | TC_CONS_RELOC); | |
3645 | #endif /* TC_CONS_FIX_NEW */ | |
3646 | #endif /* BFD_ASSEMBLER */ | |
3647 | } | |
3648 | } | |
3649 | \f | |
3650 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3651 | ||
3652 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as | |
3653 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
3654 | then pack them all together. We do a little better in that we allow | |
3655 | them in words, longs, etc. and we'll pack them in target byte order | |
3656 | for you. | |
3657 | ||
3658 | The rules are: pack least significat bit first, if a field doesn't | |
3659 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
3660 | explicitly *not* even a warning. The bitwidth should be considered | |
3661 | a "mask". | |
3662 | ||
3663 | To use this function the tc-XXX.h file should define | |
3664 | BITFIELD_CONS_EXPRESSIONS. */ | |
3665 | ||
3666 | static void | |
3667 | parse_bitfield_cons (exp, nbytes) | |
3668 | expressionS *exp; | |
3669 | unsigned int nbytes; | |
3670 | { | |
3671 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
3672 | char *hold = input_line_pointer; | |
3673 | ||
3674 | (void) expression (exp); | |
3675 | ||
3676 | if (*input_line_pointer == ':') | |
3677 | { /* bitfields */ | |
3678 | long value = 0; | |
3679 | ||
3680 | for (;;) | |
3681 | { | |
3682 | unsigned long width; | |
3683 | ||
3684 | if (*input_line_pointer != ':') | |
3685 | { | |
3686 | input_line_pointer = hold; | |
3687 | break; | |
3688 | } /* next piece is not a bitfield */ | |
3689 | ||
3690 | /* In the general case, we can't allow | |
3691 | full expressions with symbol | |
3692 | differences and such. The relocation | |
3693 | entries for symbols not defined in this | |
3694 | assembly would require arbitrary field | |
3695 | widths, positions, and masks which most | |
3696 | of our current object formats don't | |
3697 | support. | |
3698 | ||
3699 | In the specific case where a symbol | |
3700 | *is* defined in this assembly, we | |
3701 | *could* build fixups and track it, but | |
3702 | this could lead to confusion for the | |
3703 | backends. I'm lazy. I'll take any | |
3704 | SEG_ABSOLUTE. I think that means that | |
3705 | you can use a previous .set or | |
3706 | .equ type symbol. xoxorich. */ | |
3707 | ||
3708 | if (exp->X_op == O_absent) | |
3709 | { | |
3710 | as_warn (_("using a bit field width of zero")); | |
3711 | exp->X_add_number = 0; | |
3712 | exp->X_op = O_constant; | |
3713 | } /* implied zero width bitfield */ | |
3714 | ||
3715 | if (exp->X_op != O_constant) | |
3716 | { | |
3717 | *input_line_pointer = '\0'; | |
3718 | as_bad (_("field width \"%s\" too complex for a bitfield"), hold); | |
3719 | *input_line_pointer = ':'; | |
3720 | demand_empty_rest_of_line (); | |
3721 | return; | |
3722 | } /* too complex */ | |
3723 | ||
3724 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
3725 | { | |
3726 | as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"), | |
3727 | width, nbytes, (BITS_PER_CHAR * nbytes)); | |
3728 | width = BITS_PER_CHAR * nbytes; | |
3729 | } /* too big */ | |
3730 | ||
3731 | if (width > bits_available) | |
3732 | { | |
3733 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ | |
3734 | input_line_pointer = hold; | |
3735 | exp->X_add_number = value; | |
3736 | break; | |
3737 | } /* won't fit */ | |
3738 | ||
3739 | hold = ++input_line_pointer; /* skip ':' */ | |
3740 | ||
3741 | (void) expression (exp); | |
3742 | if (exp->X_op != O_constant) | |
3743 | { | |
3744 | char cache = *input_line_pointer; | |
3745 | ||
3746 | *input_line_pointer = '\0'; | |
3747 | as_bad (_("field value \"%s\" too complex for a bitfield"), hold); | |
3748 | *input_line_pointer = cache; | |
3749 | demand_empty_rest_of_line (); | |
3750 | return; | |
3751 | } /* too complex */ | |
3752 | ||
3753 | value |= ((~(-1 << width) & exp->X_add_number) | |
3754 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
3755 | ||
3756 | if ((bits_available -= width) == 0 | |
3757 | || is_it_end_of_statement () | |
3758 | || *input_line_pointer != ',') | |
3759 | { | |
3760 | break; | |
3761 | } /* all the bitfields we're gonna get */ | |
3762 | ||
3763 | hold = ++input_line_pointer; | |
3764 | (void) expression (exp); | |
3765 | } /* forever loop */ | |
3766 | ||
3767 | exp->X_add_number = value; | |
3768 | exp->X_op = O_constant; | |
3769 | exp->X_unsigned = 1; | |
3770 | } /* if looks like a bitfield */ | |
3771 | } /* parse_bitfield_cons() */ | |
3772 | ||
3773 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
3774 | \f | |
3775 | /* Handle an MRI style string expression. */ | |
3776 | ||
3777 | static void | |
3778 | parse_mri_cons (exp, nbytes) | |
3779 | expressionS *exp; | |
3780 | unsigned int nbytes; | |
3781 | { | |
3782 | if (*input_line_pointer != '\'' | |
3783 | && (input_line_pointer[1] != '\'' | |
3784 | || (*input_line_pointer != 'A' | |
3785 | && *input_line_pointer != 'E'))) | |
3786 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); | |
3787 | else | |
3788 | { | |
3789 | unsigned int scan; | |
3790 | unsigned int result = 0; | |
3791 | ||
3792 | /* An MRI style string. Cut into as many bytes as will fit into | |
3793 | a nbyte chunk, left justify if necessary, and separate with | |
3794 | commas so we can try again later. */ | |
3795 | if (*input_line_pointer == 'A') | |
3796 | ++input_line_pointer; | |
3797 | else if (*input_line_pointer == 'E') | |
3798 | { | |
3799 | as_bad (_("EBCDIC constants are not supported")); | |
3800 | ++input_line_pointer; | |
3801 | } | |
3802 | ||
3803 | input_line_pointer++; | |
3804 | for (scan = 0; scan < nbytes; scan++) | |
3805 | { | |
3806 | if (*input_line_pointer == '\'') | |
3807 | { | |
3808 | if (input_line_pointer[1] == '\'') | |
3809 | { | |
3810 | input_line_pointer++; | |
3811 | } | |
3812 | else | |
3813 | break; | |
3814 | } | |
3815 | result = (result << 8) | (*input_line_pointer++); | |
3816 | } | |
3817 | ||
3818 | /* Left justify */ | |
3819 | while (scan < nbytes) | |
3820 | { | |
3821 | result <<= 8; | |
3822 | scan++; | |
3823 | } | |
3824 | /* Create correct expression */ | |
3825 | exp->X_op = O_constant; | |
3826 | exp->X_add_number = result; | |
3827 | /* Fake it so that we can read the next char too */ | |
3828 | if (input_line_pointer[0] != '\'' || | |
3829 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
3830 | { | |
3831 | input_line_pointer -= 2; | |
3832 | input_line_pointer[0] = ','; | |
3833 | input_line_pointer[1] = '\''; | |
3834 | } | |
3835 | else | |
3836 | input_line_pointer++; | |
3837 | } | |
3838 | } | |
3839 | \f | |
3840 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3841 | ||
3842 | /* Parse a repeat expression for cons. This is used by the MIPS | |
3843 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
3844 | object file COUNT times. | |
3845 | ||
3846 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
3847 | ||
3848 | static void | |
3849 | parse_repeat_cons (exp, nbytes) | |
3850 | expressionS *exp; | |
3851 | unsigned int nbytes; | |
3852 | { | |
3853 | expressionS count; | |
3854 | register int i; | |
3855 | ||
3856 | expression (exp); | |
3857 | ||
3858 | if (*input_line_pointer != ':') | |
3859 | { | |
3860 | /* No repeat count. */ | |
3861 | return; | |
3862 | } | |
3863 | ||
3864 | ++input_line_pointer; | |
3865 | expression (&count); | |
3866 | if (count.X_op != O_constant | |
3867 | || count.X_add_number <= 0) | |
3868 | { | |
3869 | as_warn (_("Unresolvable or nonpositive repeat count; using 1")); | |
3870 | return; | |
3871 | } | |
3872 | ||
3873 | /* The cons function is going to output this expression once. So we | |
3874 | output it count - 1 times. */ | |
3875 | for (i = count.X_add_number - 1; i > 0; i--) | |
3876 | emit_expr (exp, nbytes); | |
3877 | } | |
3878 | ||
3879 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
3880 | \f | |
3881 | /* Parse a floating point number represented as a hex constant. This | |
3882 | permits users to specify the exact bits they want in the floating | |
3883 | point number. */ | |
3884 | ||
3885 | static int | |
3886 | hex_float (float_type, bytes) | |
3887 | int float_type; | |
3888 | char *bytes; | |
3889 | { | |
3890 | int length; | |
3891 | int i; | |
3892 | ||
3893 | switch (float_type) | |
3894 | { | |
3895 | case 'f': | |
3896 | case 'F': | |
3897 | case 's': | |
3898 | case 'S': | |
3899 | length = 4; | |
3900 | break; | |
3901 | ||
3902 | case 'd': | |
3903 | case 'D': | |
3904 | case 'r': | |
3905 | case 'R': | |
3906 | length = 8; | |
3907 | break; | |
3908 | ||
3909 | case 'x': | |
3910 | case 'X': | |
3911 | length = 12; | |
3912 | break; | |
3913 | ||
3914 | case 'p': | |
3915 | case 'P': | |
3916 | length = 12; | |
3917 | break; | |
3918 | ||
3919 | default: | |
3920 | as_bad (_("Unknown floating type type '%c'"), float_type); | |
3921 | return -1; | |
3922 | } | |
3923 | ||
3924 | /* It would be nice if we could go through expression to parse the | |
3925 | hex constant, but if we get a bignum it's a pain to sort it into | |
3926 | the buffer correctly. */ | |
3927 | i = 0; | |
3928 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') | |
3929 | { | |
3930 | int d; | |
3931 | ||
3932 | /* The MRI assembler accepts arbitrary underscores strewn about | |
3933 | through the hex constant, so we ignore them as well. */ | |
3934 | if (*input_line_pointer == '_') | |
3935 | { | |
3936 | ++input_line_pointer; | |
3937 | continue; | |
3938 | } | |
3939 | ||
3940 | if (i >= length) | |
3941 | { | |
3942 | as_warn (_("Floating point constant too large")); | |
3943 | return -1; | |
3944 | } | |
3945 | d = hex_value (*input_line_pointer) << 4; | |
3946 | ++input_line_pointer; | |
3947 | while (*input_line_pointer == '_') | |
3948 | ++input_line_pointer; | |
3949 | if (hex_p (*input_line_pointer)) | |
3950 | { | |
3951 | d += hex_value (*input_line_pointer); | |
3952 | ++input_line_pointer; | |
3953 | } | |
3954 | if (target_big_endian) | |
3955 | bytes[i] = d; | |
3956 | else | |
3957 | bytes[length - i - 1] = d; | |
3958 | ++i; | |
3959 | } | |
3960 | ||
3961 | if (i < length) | |
3962 | { | |
3963 | if (target_big_endian) | |
3964 | memset (bytes + i, 0, length - i); | |
3965 | else | |
3966 | memset (bytes, 0, length - i); | |
3967 | } | |
3968 | ||
3969 | return length; | |
3970 | } | |
3971 | ||
3972 | /* | |
3973 | * float_cons() | |
3974 | * | |
3975 | * CONStruct some more frag chars of .floats .ffloats etc. | |
3976 | * Makes 0 or more new frags. | |
3977 | * If need_pass_2 == 1, no frags are emitted. | |
3978 | * This understands only floating literals, not expressions. Sorry. | |
3979 | * | |
3980 | * A floating constant is defined by atof_generic(), except it is preceded | |
3981 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
3982 | * reading, I decided to be incompatible. This always tries to give you | |
3983 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
3984 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
3985 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
3986 | * scanners you directed AS to use. | |
3987 | * | |
3988 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
3989 | * | |
3990 | */ | |
3991 | ||
3992 | void | |
3993 | float_cons (float_type) | |
3994 | /* Clobbers input_line-pointer, checks end-of-line. */ | |
3995 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ | |
3996 | { | |
3997 | register char *p; | |
3998 | int length; /* Number of chars in an object. */ | |
3999 | register char *err; /* Error from scanning floating literal. */ | |
4000 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
4001 | ||
4002 | if (is_it_end_of_statement ()) | |
4003 | { | |
4004 | demand_empty_rest_of_line (); | |
4005 | return; | |
4006 | } | |
4007 | ||
4008 | #ifdef md_flush_pending_output | |
4009 | md_flush_pending_output (); | |
4010 | #endif | |
4011 | ||
4012 | do | |
4013 | { | |
4014 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
4015 | SKIP_WHITESPACE (); | |
4016 | ||
4017 | /* Skip any 0{letter} that may be present. Don't even check if the | |
4018 | * letter is legal. Someone may invent a "z" format and this routine | |
4019 | * has no use for such information. Lusers beware: you get | |
4020 | * diagnostics if your input is ill-conditioned. | |
4021 | */ | |
4022 | if (input_line_pointer[0] == '0' | |
4023 | && isalpha ((unsigned char) input_line_pointer[1])) | |
4024 | input_line_pointer += 2; | |
4025 | ||
4026 | /* Accept :xxxx, where the x's are hex digits, for a floating | |
4027 | point with the exact digits specified. */ | |
4028 | if (input_line_pointer[0] == ':') | |
4029 | { | |
4030 | ++input_line_pointer; | |
4031 | length = hex_float (float_type, temp); | |
4032 | if (length < 0) | |
4033 | { | |
4034 | ignore_rest_of_line (); | |
4035 | return; | |
4036 | } | |
4037 | } | |
4038 | else | |
4039 | { | |
4040 | err = md_atof (float_type, temp, &length); | |
4041 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
4042 | know (length > 0); | |
4043 | if (err) | |
4044 | { | |
4045 | as_bad (_("Bad floating literal: %s"), err); | |
4046 | ignore_rest_of_line (); | |
4047 | return; | |
4048 | } | |
4049 | } | |
4050 | ||
4051 | if (!need_pass_2) | |
4052 | { | |
4053 | int count; | |
4054 | ||
4055 | count = 1; | |
4056 | ||
4057 | #ifdef REPEAT_CONS_EXPRESSIONS | |
4058 | if (*input_line_pointer == ':') | |
4059 | { | |
4060 | expressionS count_exp; | |
4061 | ||
4062 | ++input_line_pointer; | |
4063 | expression (&count_exp); | |
4064 | if (count_exp.X_op != O_constant | |
4065 | || count_exp.X_add_number <= 0) | |
4066 | { | |
4067 | as_warn (_("unresolvable or nonpositive repeat count; using 1")); | |
4068 | } | |
4069 | else | |
4070 | count = count_exp.X_add_number; | |
4071 | } | |
4072 | #endif | |
4073 | ||
4074 | while (--count >= 0) | |
4075 | { | |
4076 | p = frag_more (length); | |
4077 | memcpy (p, temp, (unsigned int) length); | |
4078 | } | |
4079 | } | |
4080 | SKIP_WHITESPACE (); | |
4081 | } | |
4082 | while (*input_line_pointer++ == ','); | |
4083 | ||
4084 | --input_line_pointer; /* Put terminator back into stream. */ | |
4085 | demand_empty_rest_of_line (); | |
4086 | } /* float_cons() */ | |
4087 | \f | |
4088 | /* Return the size of a LEB128 value */ | |
4089 | ||
4090 | static inline int | |
4091 | sizeof_sleb128 (value) | |
4092 | offsetT value; | |
4093 | { | |
4094 | register int size = 0; | |
4095 | register unsigned byte; | |
4096 | ||
4097 | do | |
4098 | { | |
4099 | byte = (value & 0x7f); | |
4100 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4101 | Fortunately, we can structure things so that the extra work reduces | |
4102 | to a noop on systems that do things "properly". */ | |
4103 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4104 | size += 1; | |
4105 | } | |
4106 | while (!(((value == 0) && ((byte & 0x40) == 0)) | |
4107 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4108 | ||
4109 | return size; | |
4110 | } | |
4111 | ||
4112 | static inline int | |
4113 | sizeof_uleb128 (value) | |
4114 | valueT value; | |
4115 | { | |
4116 | register int size = 0; | |
4117 | register unsigned byte; | |
4118 | ||
4119 | do | |
4120 | { | |
4121 | byte = (value & 0x7f); | |
4122 | value >>= 7; | |
4123 | size += 1; | |
4124 | } | |
4125 | while (value != 0); | |
4126 | ||
4127 | return size; | |
4128 | } | |
4129 | ||
4130 | int | |
4131 | sizeof_leb128 (value, sign) | |
4132 | valueT value; | |
4133 | int sign; | |
4134 | { | |
4135 | if (sign) | |
4136 | return sizeof_sleb128 ((offsetT) value); | |
4137 | else | |
4138 | return sizeof_uleb128 (value); | |
4139 | } | |
4140 | ||
4141 | /* Output a LEB128 value. */ | |
4142 | ||
4143 | static inline int | |
4144 | output_sleb128 (p, value) | |
4145 | char *p; | |
4146 | offsetT value; | |
4147 | { | |
4148 | register char *orig = p; | |
4149 | register int more; | |
4150 | ||
4151 | do | |
4152 | { | |
4153 | unsigned byte = (value & 0x7f); | |
4154 | ||
4155 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4156 | Fortunately, we can structure things so that the extra work reduces | |
4157 | to a noop on systems that do things "properly". */ | |
4158 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4159 | ||
4160 | more = !((((value == 0) && ((byte & 0x40) == 0)) | |
4161 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4162 | if (more) | |
4163 | byte |= 0x80; | |
4164 | ||
4165 | *p++ = byte; | |
4166 | } | |
4167 | while (more); | |
4168 | ||
4169 | return p - orig; | |
4170 | } | |
4171 | ||
4172 | static inline int | |
4173 | output_uleb128 (p, value) | |
4174 | char *p; | |
4175 | valueT value; | |
4176 | { | |
4177 | char *orig = p; | |
4178 | ||
4179 | do | |
4180 | { | |
4181 | unsigned byte = (value & 0x7f); | |
4182 | value >>= 7; | |
4183 | if (value != 0) | |
4184 | /* More bytes to follow. */ | |
4185 | byte |= 0x80; | |
4186 | ||
4187 | *p++ = byte; | |
4188 | } | |
4189 | while (value != 0); | |
4190 | ||
4191 | return p - orig; | |
4192 | } | |
4193 | ||
4194 | int | |
4195 | output_leb128 (p, value, sign) | |
4196 | char *p; | |
4197 | valueT value; | |
4198 | int sign; | |
4199 | { | |
4200 | if (sign) | |
4201 | return output_sleb128 (p, (offsetT) value); | |
4202 | else | |
4203 | return output_uleb128 (p, value); | |
4204 | } | |
4205 | ||
4206 | /* Do the same for bignums. We combine sizeof with output here in that | |
4207 | we don't output for NULL values of P. It isn't really as critical as | |
4208 | for "normal" values that this be streamlined. */ | |
4209 | ||
4210 | static int | |
4211 | output_big_sleb128 (p, bignum, size) | |
4212 | char *p; | |
4213 | LITTLENUM_TYPE *bignum; | |
4214 | int size; | |
4215 | { | |
4216 | char *orig = p; | |
4217 | valueT val = 0; | |
4218 | int loaded = 0; | |
4219 | unsigned byte; | |
4220 | ||
4221 | /* Strip leading sign extensions off the bignum. */ | |
4222 | while (size > 0 && bignum[size-1] == (LITTLENUM_TYPE)-1) | |
4223 | size--; | |
4224 | ||
4225 | do | |
4226 | { | |
4227 | if (loaded < 7 && size > 0) | |
4228 | { | |
4229 | val |= (*bignum << loaded); | |
4230 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4231 | size--; | |
4232 | bignum++; | |
4233 | } | |
4234 | ||
4235 | byte = val & 0x7f; | |
4236 | loaded -= 7; | |
4237 | val >>= 7; | |
4238 | ||
4239 | if (size == 0) | |
4240 | { | |
4241 | if ((val == 0 && (byte & 0x40) == 0) | |
4242 | || (~(val | ~(((valueT)1 << loaded) - 1)) == 0 | |
4243 | && (byte & 0x40) != 0)) | |
4244 | byte |= 0x80; | |
4245 | } | |
4246 | ||
4247 | if (orig) | |
4248 | *p = byte; | |
4249 | p++; | |
4250 | } | |
4251 | while (byte & 0x80); | |
4252 | ||
4253 | return p - orig; | |
4254 | } | |
4255 | ||
4256 | static int | |
4257 | output_big_uleb128 (p, bignum, size) | |
4258 | char *p; | |
4259 | LITTLENUM_TYPE *bignum; | |
4260 | int size; | |
4261 | { | |
4262 | char *orig = p; | |
4263 | valueT val = 0; | |
4264 | int loaded = 0; | |
4265 | unsigned byte; | |
4266 | ||
4267 | /* Strip leading zeros off the bignum. */ | |
4268 | /* XXX: Is this needed? */ | |
4269 | while (size > 0 && bignum[size-1] == 0) | |
4270 | size--; | |
4271 | ||
4272 | do | |
4273 | { | |
4274 | if (loaded < 7 && size > 0) | |
4275 | { | |
4276 | val |= (*bignum << loaded); | |
4277 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4278 | size--; | |
4279 | bignum++; | |
4280 | } | |
4281 | ||
4282 | byte = val & 0x7f; | |
4283 | loaded -= 7; | |
4284 | val >>= 7; | |
4285 | ||
4286 | if (size > 0 || val) | |
4287 | byte |= 0x80; | |
4288 | ||
4289 | if (orig) | |
4290 | *p = byte; | |
4291 | p++; | |
4292 | } | |
4293 | while (byte & 0x80); | |
4294 | ||
4295 | return p - orig; | |
4296 | } | |
4297 | ||
4298 | static inline int | |
4299 | output_big_leb128 (p, bignum, size, sign) | |
4300 | char *p; | |
4301 | LITTLENUM_TYPE *bignum; | |
4302 | int size, sign; | |
4303 | { | |
4304 | if (sign) | |
4305 | return output_big_sleb128 (p, bignum, size); | |
4306 | else | |
4307 | return output_big_uleb128 (p, bignum, size); | |
4308 | } | |
4309 | ||
4310 | /* Generate the appropriate fragments for a given expression to emit a | |
4311 | leb128 value. */ | |
4312 | ||
4313 | void | |
4314 | emit_leb128_expr(exp, sign) | |
4315 | expressionS *exp; | |
4316 | int sign; | |
4317 | { | |
4318 | operatorT op = exp->X_op; | |
4319 | ||
4320 | if (op == O_absent || op == O_illegal) | |
4321 | { | |
4322 | as_warn (_("zero assumed for missing expression")); | |
4323 | exp->X_add_number = 0; | |
4324 | op = O_constant; | |
4325 | } | |
4326 | else if (op == O_big && exp->X_add_number <= 0) | |
4327 | { | |
4328 | as_bad (_("floating point number invalid; zero assumed")); | |
4329 | exp->X_add_number = 0; | |
4330 | op = O_constant; | |
4331 | } | |
4332 | else if (op == O_register) | |
4333 | { | |
4334 | as_warn (_("register value used as expression")); | |
4335 | op = O_constant; | |
4336 | } | |
4337 | ||
4338 | if (op == O_constant) | |
4339 | { | |
4340 | /* If we've got a constant, emit the thing directly right now. */ | |
4341 | ||
4342 | valueT value = exp->X_add_number; | |
4343 | int size; | |
4344 | char *p; | |
4345 | ||
4346 | size = sizeof_leb128 (value, sign); | |
4347 | p = frag_more (size); | |
4348 | output_leb128 (p, value, sign); | |
4349 | } | |
4350 | else if (op == O_big) | |
4351 | { | |
4352 | /* O_big is a different sort of constant. */ | |
4353 | ||
4354 | int size; | |
4355 | char *p; | |
4356 | ||
4357 | size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign); | |
4358 | p = frag_more (size); | |
4359 | output_big_leb128 (p, generic_bignum, exp->X_add_number, sign); | |
4360 | } | |
4361 | else | |
4362 | { | |
4363 | /* Otherwise, we have to create a variable sized fragment and | |
4364 | resolve things later. */ | |
4365 | ||
4366 | frag_var (rs_leb128, sizeof_uleb128 (~(valueT)0), 0, sign, | |
4367 | make_expr_symbol (exp), 0, (char *) NULL); | |
4368 | } | |
4369 | } | |
4370 | ||
4371 | /* Parse the .sleb128 and .uleb128 pseudos. */ | |
4372 | ||
4373 | void | |
4374 | s_leb128 (sign) | |
4375 | int sign; | |
4376 | { | |
4377 | expressionS exp; | |
4378 | ||
4379 | do { | |
4380 | expression (&exp); | |
4381 | emit_leb128_expr (&exp, sign); | |
4382 | } while (*input_line_pointer++ == ','); | |
4383 | ||
4384 | input_line_pointer--; | |
4385 | demand_empty_rest_of_line (); | |
4386 | } | |
4387 | \f | |
4388 | /* | |
4389 | * stringer() | |
4390 | * | |
4391 | * We read 0 or more ',' seperated, double-quoted strings. | |
4392 | * | |
4393 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
4394 | */ | |
4395 | ||
4396 | ||
4397 | void | |
4398 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
4399 | /* Checks end-of-line. */ | |
4400 | register int append_zero; /* 0: don't append '\0', else 1 */ | |
4401 | { | |
4402 | register unsigned int c; | |
4403 | char *start; | |
4404 | ||
4405 | #ifdef md_flush_pending_output | |
4406 | md_flush_pending_output (); | |
4407 | #endif | |
4408 | ||
4409 | /* | |
4410 | * The following awkward logic is to parse ZERO or more strings, | |
4411 | * comma separated. Recall a string expression includes spaces | |
4412 | * before the opening '\"' and spaces after the closing '\"'. | |
4413 | * We fake a leading ',' if there is (supposed to be) | |
4414 | * a 1st, expression. We keep demanding expressions for each | |
4415 | * ','. | |
4416 | */ | |
4417 | if (is_it_end_of_statement ()) | |
4418 | { | |
4419 | c = 0; /* Skip loop. */ | |
4420 | ++input_line_pointer; /* Compensate for end of loop. */ | |
4421 | } | |
4422 | else | |
4423 | { | |
4424 | c = ','; /* Do loop. */ | |
4425 | } | |
4426 | while (c == ',' || c == '<' || c == '"') | |
4427 | { | |
4428 | SKIP_WHITESPACE (); | |
4429 | switch (*input_line_pointer) | |
4430 | { | |
4431 | case '\"': | |
4432 | ++input_line_pointer; /*->1st char of string. */ | |
4433 | start = input_line_pointer; | |
4434 | while (is_a_char (c = next_char_of_string ())) | |
4435 | { | |
4436 | FRAG_APPEND_1_CHAR (c); | |
4437 | } | |
4438 | if (append_zero) | |
4439 | { | |
4440 | FRAG_APPEND_1_CHAR (0); | |
4441 | } | |
4442 | know (input_line_pointer[-1] == '\"'); | |
4443 | ||
4444 | #ifndef NO_LISTING | |
4445 | #ifdef OBJ_ELF | |
4446 | /* In ELF, when gcc is emitting DWARF 1 debugging output, it | |
4447 | will emit .string with a filename in the .debug section | |
4448 | after a sequence of constants. See the comment in | |
4449 | emit_expr for the sequence. emit_expr will set | |
4450 | dwarf_file_string to non-zero if this string might be a | |
4451 | source file name. */ | |
4452 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
4453 | dwarf_file_string = 0; | |
4454 | else if (dwarf_file_string) | |
4455 | { | |
4456 | c = input_line_pointer[-1]; | |
4457 | input_line_pointer[-1] = '\0'; | |
4458 | listing_source_file (start); | |
4459 | input_line_pointer[-1] = c; | |
4460 | } | |
4461 | #endif | |
4462 | #endif | |
4463 | ||
4464 | break; | |
4465 | case '<': | |
4466 | input_line_pointer++; | |
4467 | c = get_single_number (); | |
4468 | FRAG_APPEND_1_CHAR (c); | |
4469 | if (*input_line_pointer != '>') | |
4470 | { | |
4471 | as_bad (_("Expected <nn>")); | |
4472 | } | |
4473 | input_line_pointer++; | |
4474 | break; | |
4475 | case ',': | |
4476 | input_line_pointer++; | |
4477 | break; | |
4478 | } | |
4479 | SKIP_WHITESPACE (); | |
4480 | c = *input_line_pointer; | |
4481 | } | |
4482 | ||
4483 | demand_empty_rest_of_line (); | |
4484 | } /* stringer() */ | |
4485 | \f | |
4486 | /* FIXME-SOMEDAY: I had trouble here on characters with the | |
4487 | high bits set. We'll probably also have trouble with | |
4488 | multibyte chars, wide chars, etc. Also be careful about | |
4489 | returning values bigger than 1 byte. xoxorich. */ | |
4490 | ||
4491 | unsigned int | |
4492 | next_char_of_string () | |
4493 | { | |
4494 | register unsigned int c; | |
4495 | ||
4496 | c = *input_line_pointer++ & CHAR_MASK; | |
4497 | switch (c) | |
4498 | { | |
4499 | case '\"': | |
4500 | c = NOT_A_CHAR; | |
4501 | break; | |
4502 | ||
4503 | case '\n': | |
4504 | as_warn (_("Unterminated string: Newline inserted.")); | |
4505 | bump_line_counters (); | |
4506 | break; | |
4507 | ||
4508 | #ifndef NO_STRING_ESCAPES | |
4509 | case '\\': | |
4510 | switch (c = *input_line_pointer++) | |
4511 | { | |
4512 | case 'b': | |
4513 | c = '\b'; | |
4514 | break; | |
4515 | ||
4516 | case 'f': | |
4517 | c = '\f'; | |
4518 | break; | |
4519 | ||
4520 | case 'n': | |
4521 | c = '\n'; | |
4522 | break; | |
4523 | ||
4524 | case 'r': | |
4525 | c = '\r'; | |
4526 | break; | |
4527 | ||
4528 | case 't': | |
4529 | c = '\t'; | |
4530 | break; | |
4531 | ||
4532 | case 'v': | |
4533 | c = '\013'; | |
4534 | break; | |
4535 | ||
4536 | case '\\': | |
4537 | case '"': | |
4538 | break; /* As itself. */ | |
4539 | ||
4540 | case '0': | |
4541 | case '1': | |
4542 | case '2': | |
4543 | case '3': | |
4544 | case '4': | |
4545 | case '5': | |
4546 | case '6': | |
4547 | case '7': | |
4548 | case '8': | |
4549 | case '9': | |
4550 | { | |
4551 | long number; | |
4552 | int i; | |
4553 | ||
4554 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) | |
4555 | { | |
4556 | number = number * 8 + c - '0'; | |
4557 | } | |
4558 | c = number & 0xff; | |
4559 | } | |
4560 | --input_line_pointer; | |
4561 | break; | |
4562 | ||
4563 | case 'x': | |
4564 | case 'X': | |
4565 | { | |
4566 | long number; | |
4567 | ||
4568 | number = 0; | |
4569 | c = *input_line_pointer++; | |
4570 | while (isxdigit (c)) | |
4571 | { | |
4572 | if (isdigit (c)) | |
4573 | number = number * 16 + c - '0'; | |
4574 | else if (isupper (c)) | |
4575 | number = number * 16 + c - 'A' + 10; | |
4576 | else | |
4577 | number = number * 16 + c - 'a' + 10; | |
4578 | c = *input_line_pointer++; | |
4579 | } | |
4580 | c = number & 0xff; | |
4581 | --input_line_pointer; | |
4582 | } | |
4583 | break; | |
4584 | ||
4585 | case '\n': | |
4586 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
4587 | as_warn (_("Unterminated string: Newline inserted.")); | |
4588 | c = '\n'; | |
4589 | bump_line_counters (); | |
4590 | break; | |
4591 | ||
4592 | default: | |
4593 | ||
4594 | #ifdef ONLY_STANDARD_ESCAPES | |
4595 | as_bad (_("Bad escaped character in string, '?' assumed")); | |
4596 | c = '?'; | |
4597 | #endif /* ONLY_STANDARD_ESCAPES */ | |
4598 | ||
4599 | break; | |
4600 | } /* switch on escaped char */ | |
4601 | break; | |
4602 | #endif /* ! defined (NO_STRING_ESCAPES) */ | |
4603 | ||
4604 | default: | |
4605 | break; | |
4606 | } /* switch on char */ | |
4607 | return (c); | |
4608 | } /* next_char_of_string() */ | |
4609 | \f | |
4610 | static segT | |
4611 | get_segmented_expression (expP) | |
4612 | register expressionS *expP; | |
4613 | { | |
4614 | register segT retval; | |
4615 | ||
4616 | retval = expression (expP); | |
4617 | if (expP->X_op == O_illegal | |
4618 | || expP->X_op == O_absent | |
4619 | || expP->X_op == O_big) | |
4620 | { | |
4621 | as_bad (_("expected address expression; zero assumed")); | |
4622 | expP->X_op = O_constant; | |
4623 | expP->X_add_number = 0; | |
4624 | retval = absolute_section; | |
4625 | } | |
4626 | return retval; | |
4627 | } | |
4628 | ||
4629 | static segT | |
4630 | get_known_segmented_expression (expP) | |
4631 | register expressionS *expP; | |
4632 | { | |
4633 | register segT retval; | |
4634 | ||
4635 | if ((retval = get_segmented_expression (expP)) == undefined_section) | |
4636 | { | |
4637 | /* There is no easy way to extract the undefined symbol from the | |
4638 | expression. */ | |
4639 | if (expP->X_add_symbol != NULL | |
4640 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
4641 | as_warn (_("symbol \"%s\" undefined; zero assumed"), | |
4642 | S_GET_NAME (expP->X_add_symbol)); | |
4643 | else | |
4644 | as_warn (_("some symbol undefined; zero assumed")); | |
4645 | retval = absolute_section; | |
4646 | expP->X_op = O_constant; | |
4647 | expP->X_add_number = 0; | |
4648 | } | |
4649 | know (retval == absolute_section || SEG_NORMAL (retval)); | |
4650 | return (retval); | |
4651 | } /* get_known_segmented_expression() */ | |
4652 | ||
4653 | offsetT | |
4654 | get_absolute_expression () | |
4655 | { | |
4656 | expressionS exp; | |
4657 | ||
4658 | expression (&exp); | |
4659 | if (exp.X_op != O_constant) | |
4660 | { | |
4661 | if (exp.X_op != O_absent) | |
4662 | as_bad (_("bad or irreducible absolute expression; zero assumed")); | |
4663 | exp.X_add_number = 0; | |
4664 | } | |
4665 | return exp.X_add_number; | |
4666 | } | |
4667 | ||
4668 | char /* return terminator */ | |
4669 | get_absolute_expression_and_terminator (val_pointer) | |
4670 | long *val_pointer; /* return value of expression */ | |
4671 | { | |
4672 | /* FIXME: val_pointer should probably be offsetT *. */ | |
4673 | *val_pointer = (long) get_absolute_expression (); | |
4674 | return (*input_line_pointer++); | |
4675 | } | |
4676 | \f | |
4677 | /* | |
4678 | * demand_copy_C_string() | |
4679 | * | |
4680 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
4681 | * Give a warning if that happens. | |
4682 | */ | |
4683 | char * | |
4684 | demand_copy_C_string (len_pointer) | |
4685 | int *len_pointer; | |
4686 | { | |
4687 | register char *s; | |
4688 | ||
4689 | if ((s = demand_copy_string (len_pointer)) != 0) | |
4690 | { | |
4691 | register int len; | |
4692 | ||
4693 | for (len = *len_pointer; len > 0; len--) | |
4694 | { | |
4695 | if (*s == 0) | |
4696 | { | |
4697 | s = 0; | |
4698 | len = 1; | |
4699 | *len_pointer = 0; | |
4700 | as_bad (_("This string may not contain \'\\0\'")); | |
4701 | } | |
4702 | } | |
4703 | } | |
4704 | return s; | |
4705 | } | |
4706 | \f | |
4707 | /* | |
4708 | * demand_copy_string() | |
4709 | * | |
4710 | * Demand string, but return a safe (=private) copy of the string. | |
4711 | * Return NULL if we can't read a string here. | |
4712 | */ | |
4713 | char * | |
4714 | demand_copy_string (lenP) | |
4715 | int *lenP; | |
4716 | { | |
4717 | register unsigned int c; | |
4718 | register int len; | |
4719 | char *retval; | |
4720 | ||
4721 | len = 0; | |
4722 | SKIP_WHITESPACE (); | |
4723 | if (*input_line_pointer == '\"') | |
4724 | { | |
4725 | input_line_pointer++; /* Skip opening quote. */ | |
4726 | ||
4727 | while (is_a_char (c = next_char_of_string ())) | |
4728 | { | |
4729 | obstack_1grow (¬es, c); | |
4730 | len++; | |
4731 | } | |
4732 | /* JF this next line is so demand_copy_C_string will return a | |
4733 | null terminated string. */ | |
4734 | obstack_1grow (¬es, '\0'); | |
4735 | retval = obstack_finish (¬es); | |
4736 | } | |
4737 | else | |
4738 | { | |
4739 | as_warn (_("Missing string")); | |
4740 | retval = NULL; | |
4741 | ignore_rest_of_line (); | |
4742 | } | |
4743 | *lenP = len; | |
4744 | return (retval); | |
4745 | } /* demand_copy_string() */ | |
4746 | \f | |
4747 | /* | |
4748 | * is_it_end_of_statement() | |
4749 | * | |
4750 | * In: Input_line_pointer->next character. | |
4751 | * | |
4752 | * Do: Skip input_line_pointer over all whitespace. | |
4753 | * | |
4754 | * Out: 1 if input_line_pointer->end-of-line. | |
4755 | */ | |
4756 | int | |
4757 | is_it_end_of_statement () | |
4758 | { | |
4759 | SKIP_WHITESPACE (); | |
4760 | return (is_end_of_line[(unsigned char) *input_line_pointer]); | |
4761 | } /* is_it_end_of_statement() */ | |
4762 | ||
4763 | void | |
4764 | equals (sym_name, reassign) | |
4765 | char *sym_name; | |
4766 | int reassign; | |
4767 | { | |
4768 | register symbolS *symbolP; /* symbol we are working with */ | |
4769 | char *stop = NULL; | |
4770 | char stopc; | |
4771 | ||
4772 | input_line_pointer++; | |
4773 | if (*input_line_pointer == '=') | |
4774 | input_line_pointer++; | |
4775 | ||
4776 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') | |
4777 | input_line_pointer++; | |
4778 | ||
4779 | if (flag_mri) | |
4780 | stop = mri_comment_field (&stopc); | |
4781 | ||
4782 | if (sym_name[0] == '.' && sym_name[1] == '\0') | |
4783 | { | |
4784 | /* Turn '. = mumble' into a .org mumble */ | |
4785 | register segT segment; | |
4786 | expressionS exp; | |
4787 | ||
4788 | segment = get_known_segmented_expression (&exp); | |
4789 | if (!need_pass_2) | |
4790 | do_org (segment, &exp, 0); | |
4791 | } | |
4792 | else | |
4793 | { | |
4794 | symbolP = symbol_find_or_make (sym_name); | |
4795 | /* Permit register names to be redefined. */ | |
4796 | if (! reassign | |
4797 | && S_IS_DEFINED (symbolP) | |
4798 | && S_GET_SEGMENT (symbolP) != reg_section) | |
4799 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
4800 | pseudo_set (symbolP); | |
4801 | } | |
4802 | ||
4803 | if (flag_mri) | |
4804 | { | |
4805 | ignore_rest_of_line (); /* check garbage after the expression */ | |
4806 | mri_comment_end (stop, stopc); | |
4807 | } | |
4808 | } /* equals() */ | |
4809 | ||
4810 | /* .include -- include a file at this point. */ | |
4811 | ||
4812 | /* ARGSUSED */ | |
4813 | void | |
4814 | s_include (arg) | |
4815 | int arg; | |
4816 | { | |
4817 | char *newbuf; | |
4818 | char *filename; | |
4819 | int i; | |
4820 | FILE *try; | |
4821 | char *path; | |
4822 | ||
4823 | if (! flag_m68k_mri) | |
4824 | { | |
4825 | filename = demand_copy_string (&i); | |
4826 | if (filename == NULL) | |
4827 | { | |
4828 | /* demand_copy_string has already printed an error and | |
4829 | called ignore_rest_of_line. */ | |
4830 | return; | |
4831 | } | |
4832 | } | |
4833 | else | |
4834 | { | |
4835 | SKIP_WHITESPACE (); | |
4836 | i = 0; | |
4837 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
4838 | && *input_line_pointer != ' ' | |
4839 | && *input_line_pointer != '\t') | |
4840 | { | |
4841 | obstack_1grow (¬es, *input_line_pointer); | |
4842 | ++input_line_pointer; | |
4843 | ++i; | |
4844 | } | |
4845 | obstack_1grow (¬es, '\0'); | |
4846 | filename = obstack_finish (¬es); | |
4847 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
4848 | ++input_line_pointer; | |
4849 | } | |
4850 | demand_empty_rest_of_line (); | |
4851 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); | |
4852 | for (i = 0; i < include_dir_count; i++) | |
4853 | { | |
4854 | strcpy (path, include_dirs[i]); | |
4855 | strcat (path, "/"); | |
4856 | strcat (path, filename); | |
4857 | if (0 != (try = fopen (path, "r"))) | |
4858 | { | |
4859 | fclose (try); | |
4860 | goto gotit; | |
4861 | } | |
4862 | } | |
4863 | free (path); | |
4864 | path = filename; | |
4865 | gotit: | |
4866 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
4867 | register_dependency (path); | |
4868 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
4869 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
4870 | } /* s_include() */ | |
4871 | ||
4872 | void | |
4873 | add_include_dir (path) | |
4874 | char *path; | |
4875 | { | |
4876 | int i; | |
4877 | ||
4878 | if (include_dir_count == 0) | |
4879 | { | |
4880 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); | |
4881 | include_dirs[0] = "."; /* Current dir */ | |
4882 | include_dir_count = 2; | |
4883 | } | |
4884 | else | |
4885 | { | |
4886 | include_dir_count++; | |
4887 | include_dirs = (char **) realloc (include_dirs, | |
4888 | include_dir_count * sizeof (*include_dirs)); | |
4889 | } | |
4890 | ||
4891 | include_dirs[include_dir_count - 1] = path; /* New one */ | |
4892 | ||
4893 | i = strlen (path); | |
4894 | if (i > include_dir_maxlen) | |
4895 | include_dir_maxlen = i; | |
4896 | } /* add_include_dir() */ | |
4897 | \f | |
4898 | /* Output debugging information to denote the source file. */ | |
4899 | ||
4900 | static void | |
4901 | generate_file_debug () | |
4902 | { | |
4903 | if (debug_type == DEBUG_STABS) | |
4904 | stabs_generate_asm_file (); | |
4905 | } | |
4906 | ||
4907 | /* Output line number debugging information for the current source line. */ | |
4908 | ||
4909 | void | |
4910 | generate_lineno_debug () | |
4911 | { | |
4912 | #ifdef ECOFF_DEBUGGING | |
4913 | /* ECOFF assemblers automatically generate debugging information. | |
4914 | FIXME: This should probably be handled elsewhere. */ | |
4915 | if (debug_type == DEBUG_UNSPECIFIED) | |
4916 | { | |
4917 | if (ECOFF_DEBUGGING && ecoff_no_current_file ()) | |
4918 | debug_type = DEBUG_ECOFF; | |
4919 | else | |
4920 | debug_type = DEBUG_NONE; | |
4921 | } | |
4922 | #endif | |
4923 | ||
4924 | switch (debug_type) | |
4925 | { | |
4926 | case DEBUG_UNSPECIFIED: | |
4927 | case DEBUG_NONE: | |
4928 | break; | |
4929 | case DEBUG_STABS: | |
4930 | stabs_generate_asm_lineno (); | |
4931 | break; | |
4932 | case DEBUG_ECOFF: | |
4933 | ecoff_generate_asm_lineno (); | |
4934 | break; | |
4935 | case DEBUG_DWARF: | |
4936 | case DEBUG_DWARF2: | |
4937 | /* FIXME. */ | |
4938 | break; | |
4939 | } | |
4940 | } | |
4941 | ||
4942 | /* Output debugging information to mark a function entry point or end point. | |
4943 | END_P is zero for .func, and non-zero for .endfunc. */ | |
4944 | ||
4945 | void | |
4946 | s_func (end_p) | |
4947 | int end_p; | |
4948 | { | |
4949 | do_s_func (end_p, NULL); | |
4950 | } | |
4951 | ||
4952 | /* Subroutine of s_func so targets can choose a different default prefix. | |
4953 | If DEFAULT_PREFIX is NULL, use the target's "leading char". */ | |
4954 | ||
4955 | void | |
4956 | do_s_func (end_p, default_prefix) | |
4957 | int end_p; | |
4958 | const char *default_prefix; | |
4959 | { | |
4960 | /* Record the current function so that we can issue an error message for | |
4961 | misplaced .func,.endfunc, and also so that .endfunc needs no | |
4962 | arguments. */ | |
4963 | static char *current_name; | |
4964 | static char *current_label; | |
4965 | ||
4966 | if (end_p) | |
4967 | { | |
4968 | if (current_name == NULL) | |
4969 | { | |
4970 | as_bad (_("missing .func")); | |
4971 | ignore_rest_of_line (); | |
4972 | return; | |
4973 | } | |
4974 | ||
4975 | if (debug_type == DEBUG_STABS) | |
4976 | stabs_generate_asm_endfunc (current_name, current_label); | |
4977 | ||
4978 | current_name = current_label = NULL; | |
4979 | } | |
4980 | else /* ! end_p */ | |
4981 | { | |
4982 | char *name,*label; | |
4983 | char delim1,delim2; | |
4984 | ||
4985 | if (current_name != NULL) | |
4986 | { | |
4987 | as_bad (_(".endfunc missing for previous .func")); | |
4988 | ignore_rest_of_line (); | |
4989 | return; | |
4990 | } | |
4991 | ||
4992 | name = input_line_pointer; | |
4993 | delim1 = get_symbol_end (); | |
4994 | name = xstrdup (name); | |
4995 | *input_line_pointer = delim1; | |
4996 | SKIP_WHITESPACE (); | |
4997 | if (*input_line_pointer != ',') | |
4998 | { | |
4999 | if (default_prefix) | |
5000 | asprintf (&label, "%s%s", default_prefix, name); | |
5001 | else | |
5002 | { | |
5003 | char leading_char = 0; | |
5004 | #ifdef BFD_ASSEMBLER | |
5005 | leading_char = bfd_get_symbol_leading_char (stdoutput); | |
5006 | #endif | |
5007 | /* Missing entry point, use function's name with the leading | |
5008 | char prepended. */ | |
5009 | if (leading_char) | |
5010 | asprintf (&label, "%c%s", leading_char, name); | |
5011 | else | |
5012 | label = name; | |
5013 | } | |
5014 | } | |
5015 | else | |
5016 | { | |
5017 | ++input_line_pointer; | |
5018 | SKIP_WHITESPACE (); | |
5019 | label = input_line_pointer; | |
5020 | delim2 = get_symbol_end (); | |
5021 | label = xstrdup (label); | |
5022 | *input_line_pointer = delim2; | |
5023 | } | |
5024 | ||
5025 | if (debug_type == DEBUG_STABS) | |
5026 | stabs_generate_asm_func (name, label); | |
5027 | ||
5028 | current_name = name; | |
5029 | current_label = label; | |
5030 | } | |
5031 | ||
5032 | demand_empty_rest_of_line (); | |
5033 | } | |
5034 | \f | |
5035 | void | |
5036 | s_ignore (arg) | |
5037 | int arg; | |
5038 | { | |
5039 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
5040 | { | |
5041 | ++input_line_pointer; | |
5042 | } | |
5043 | ++input_line_pointer; | |
5044 | } | |
5045 | ||
5046 | ||
5047 | void | |
5048 | read_print_statistics (file) | |
5049 | FILE *file; | |
5050 | { | |
5051 | hash_print_statistics (file, "pseudo-op table", po_hash); | |
5052 | } | |
5053 | ||
5054 | /* end of read.c */ |