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 | ||
58b5739a RH |
92 | #ifndef LEX_HASH |
93 | #define LEX_HASH 0 | |
94 | #endif | |
95 | ||
252b5132 RH |
96 | #ifndef LEX_DOLLAR |
97 | /* The a29k assembler does not permits labels to start with $. */ | |
98 | #define LEX_DOLLAR 3 | |
99 | #endif | |
100 | ||
101 | #ifndef LEX_TILDE | |
102 | /* The Delta 68k assembler permits ~ at start of label names. */ | |
103 | #define LEX_TILDE 0 | |
104 | #endif | |
105 | ||
106 | /* used by is_... macros. our ctype[] */ | |
107 | char lex_type[256] = | |
108 | { | |
109 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
110 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
58b5739a | 111 | 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ |
252b5132 RH |
112 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */ |
113 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ | |
114 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ | |
115 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ | |
116 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */ | |
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 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
122 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
123 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
124 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 | |
125 | }; | |
126 | ||
127 | ||
128 | /* | |
129 | * In: a character. | |
130 | * Out: 1 if this character ends a line. | |
131 | */ | |
132 | #define Z_ (0) | |
133 | char is_end_of_line[256] = | |
134 | { | |
135 | #ifdef CR_EOL | |
136 | 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, 99, Z_, Z_, /* @abcdefghijklmno */ | |
137 | #else | |
138 | 99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, 99, Z_, Z_, Z_, Z_, Z_, /* @abcdefghijklmno */ | |
139 | #endif | |
140 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
141 | #ifdef TC_HPPA | |
142 | Z_,99, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* _!"#$%&'()*+,-./ */ | |
143 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */ | |
144 | #else | |
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_, 99, Z_, Z_, Z_, Z_, /* 0123456789:;<=>? */ | |
147 | #endif | |
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 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
154 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
155 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
156 | Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, Z_, /* */ | |
157 | }; | |
158 | #undef Z_ | |
159 | ||
160 | /* Functions private to this file. */ | |
161 | ||
162 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
163 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
164 | ||
165 | /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the | |
166 | tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */ | |
167 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; | |
168 | ||
169 | static char *old_buffer; /* JF a hack */ | |
170 | static char *old_input; | |
171 | static char *old_limit; | |
172 | ||
173 | /* Variables for handling include file directory table. */ | |
174 | ||
175 | char **include_dirs; /* Table of pointers to directories to | |
176 | search for .include's */ | |
177 | int include_dir_count; /* How many are in the table */ | |
178 | int include_dir_maxlen = 1;/* Length of longest in table */ | |
179 | ||
180 | #ifndef WORKING_DOT_WORD | |
181 | struct broken_word *broken_words; | |
182 | int new_broken_words; | |
183 | #endif | |
184 | ||
185 | /* The current offset into the absolute section. We don't try to | |
186 | build frags in the absolute section, since no data can be stored | |
187 | there. We just keep track of the current offset. */ | |
188 | addressT abs_section_offset; | |
189 | ||
190 | /* If this line had an MRI style label, it is stored in this variable. | |
191 | This is used by some of the MRI pseudo-ops. */ | |
192 | symbolS *line_label; | |
193 | ||
194 | /* This global variable is used to support MRI common sections. We | |
195 | translate such sections into a common symbol. This variable is | |
196 | non-NULL when we are in an MRI common section. */ | |
197 | symbolS *mri_common_symbol; | |
198 | ||
199 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we | |
200 | need to align to an even byte boundary unless the next pseudo-op is | |
201 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment | |
202 | may be needed. */ | |
203 | static int mri_pending_align; | |
204 | ||
205 | #ifndef NO_LISTING | |
206 | #ifdef OBJ_ELF | |
207 | /* This variable is set to be non-zero if the next string we see might | |
208 | be the name of the source file in DWARF debugging information. See | |
209 | the comment in emit_expr for the format we look for. */ | |
210 | static int dwarf_file_string; | |
211 | #endif | |
212 | #endif | |
213 | ||
214 | static void cons_worker PARAMS ((int, int)); | |
2b47531b | 215 | static int scrub_from_string PARAMS ((char *, int)); |
252b5132 RH |
216 | static void do_align PARAMS ((int, char *, int, int)); |
217 | static void s_align PARAMS ((int, int)); | |
6d4d30bb | 218 | static void s_lcomm_internal PARAMS ((int, int)); |
252b5132 | 219 | static int hex_float PARAMS ((int, char *)); |
6d4d30bb AM |
220 | static inline int sizeof_sleb128 PARAMS ((offsetT)); |
221 | static inline int sizeof_uleb128 PARAMS ((valueT)); | |
222 | static inline int output_sleb128 PARAMS ((char *, offsetT)); | |
223 | static inline int output_uleb128 PARAMS ((char *, valueT)); | |
224 | static inline int output_big_sleb128 PARAMS ((char *, LITTLENUM_TYPE *, int)); | |
225 | static inline int output_big_uleb128 PARAMS ((char *, LITTLENUM_TYPE *, int)); | |
226 | static int output_big_leb128 PARAMS ((char *, LITTLENUM_TYPE *, int, int)); | |
252b5132 RH |
227 | static void do_org PARAMS ((segT, expressionS *, int)); |
228 | char *demand_copy_string PARAMS ((int *lenP)); | |
229 | static segT get_segmented_expression PARAMS ((expressionS *expP)); | |
230 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); | |
231 | static void pobegin PARAMS ((void)); | |
232 | static int get_line_sb PARAMS ((sb *)); | |
233 | static void generate_file_debug PARAMS ((void)); | |
234 | \f | |
235 | ||
236 | void | |
237 | read_begin () | |
238 | { | |
239 | const char *p; | |
240 | ||
241 | pobegin (); | |
242 | obj_read_begin_hook (); | |
243 | ||
244 | /* Something close -- but not too close -- to a multiple of 1024. | |
245 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
246 | obstack_begin (¬es, chunksize); | |
247 | obstack_begin (&cond_obstack, chunksize); | |
248 | ||
249 | /* Use machine dependent syntax */ | |
250 | for (p = line_separator_chars; *p; p++) | |
251 | is_end_of_line[(unsigned char) *p] = 1; | |
252 | /* Use more. FIXME-SOMEDAY. */ | |
253 | ||
254 | if (flag_mri) | |
255 | lex_type['?'] = 3; | |
256 | } | |
257 | \f | |
258 | /* set up pseudo-op tables */ | |
259 | ||
260 | static struct hash_control *po_hash; | |
261 | ||
262 | static const pseudo_typeS potable[] = | |
263 | { | |
264 | {"abort", s_abort, 0}, | |
265 | {"align", s_align_ptwo, 0}, | |
266 | {"ascii", stringer, 0}, | |
267 | {"asciz", stringer, 1}, | |
268 | {"balign", s_align_bytes, 0}, | |
269 | {"balignw", s_align_bytes, -2}, | |
270 | {"balignl", s_align_bytes, -4}, | |
271 | /* block */ | |
272 | {"byte", cons, 1}, | |
273 | {"comm", s_comm, 0}, | |
274 | {"common", s_mri_common, 0}, | |
275 | {"common.s", s_mri_common, 1}, | |
276 | {"data", s_data, 0}, | |
277 | {"dc", cons, 2}, | |
278 | {"dc.b", cons, 1}, | |
279 | {"dc.d", float_cons, 'd'}, | |
280 | {"dc.l", cons, 4}, | |
281 | {"dc.s", float_cons, 'f'}, | |
282 | {"dc.w", cons, 2}, | |
283 | {"dc.x", float_cons, 'x'}, | |
284 | {"dcb", s_space, 2}, | |
285 | {"dcb.b", s_space, 1}, | |
286 | {"dcb.d", s_float_space, 'd'}, | |
287 | {"dcb.l", s_space, 4}, | |
288 | {"dcb.s", s_float_space, 'f'}, | |
289 | {"dcb.w", s_space, 2}, | |
290 | {"dcb.x", s_float_space, 'x'}, | |
291 | {"ds", s_space, 2}, | |
292 | {"ds.b", s_space, 1}, | |
293 | {"ds.d", s_space, 8}, | |
294 | {"ds.l", s_space, 4}, | |
295 | {"ds.p", s_space, 12}, | |
296 | {"ds.s", s_space, 4}, | |
297 | {"ds.w", s_space, 2}, | |
298 | {"ds.x", s_space, 12}, | |
299 | {"debug", s_ignore, 0}, | |
300 | #ifdef S_SET_DESC | |
301 | {"desc", s_desc, 0}, | |
302 | #endif | |
303 | /* dim */ | |
304 | {"double", float_cons, 'd'}, | |
305 | /* dsect */ | |
306 | {"eject", listing_eject, 0}, /* Formfeed listing */ | |
307 | {"else", s_else, 0}, | |
308 | {"elsec", s_else, 0}, | |
309 | {"end", s_end, 0}, | |
310 | {"endc", s_endif, 0}, | |
311 | {"endfunc", s_func, 1}, | |
312 | {"endif", s_endif, 0}, | |
313 | /* endef */ | |
314 | {"equ", s_set, 0}, | |
315 | {"equiv", s_set, 1}, | |
316 | {"err", s_err, 0}, | |
317 | {"exitm", s_mexit, 0}, | |
318 | /* extend */ | |
319 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ | |
320 | {"appfile", s_app_file, 1}, | |
321 | {"appline", s_app_line, 0}, | |
322 | {"fail", s_fail, 0}, | |
323 | {"file", s_app_file, 0}, | |
324 | {"fill", s_fill, 0}, | |
325 | {"float", float_cons, 'f'}, | |
326 | {"format", s_ignore, 0}, | |
327 | {"func", s_func, 0}, | |
328 | {"global", s_globl, 0}, | |
329 | {"globl", s_globl, 0}, | |
330 | {"hword", cons, 2}, | |
331 | {"if", s_if, (int) O_ne}, | |
332 | {"ifc", s_ifc, 0}, | |
333 | {"ifdef", s_ifdef, 0}, | |
334 | {"ifeq", s_if, (int) O_eq}, | |
335 | {"ifeqs", s_ifeqs, 0}, | |
336 | {"ifge", s_if, (int) O_ge}, | |
337 | {"ifgt", s_if, (int) O_gt}, | |
338 | {"ifle", s_if, (int) O_le}, | |
339 | {"iflt", s_if, (int) O_lt}, | |
340 | {"ifnc", s_ifc, 1}, | |
341 | {"ifndef", s_ifdef, 1}, | |
342 | {"ifne", s_if, (int) O_ne}, | |
343 | {"ifnes", s_ifeqs, 1}, | |
344 | {"ifnotdef", s_ifdef, 1}, | |
345 | {"include", s_include, 0}, | |
346 | {"int", cons, 4}, | |
347 | {"irp", s_irp, 0}, | |
348 | {"irep", s_irp, 0}, | |
349 | {"irpc", s_irp, 1}, | |
350 | {"irepc", s_irp, 1}, | |
351 | {"lcomm", s_lcomm, 0}, | |
352 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
353 | {"linkonce", s_linkonce, 0}, | |
354 | {"list", listing_list, 1}, /* Turn listing on */ | |
355 | {"llen", listing_psize, 1}, | |
356 | {"long", cons, 4}, | |
357 | {"lsym", s_lsym, 0}, | |
358 | {"macro", s_macro, 0}, | |
359 | {"mexit", s_mexit, 0}, | |
360 | {"mri", s_mri, 0}, | |
361 | {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */ | |
362 | {"name", s_ignore, 0}, | |
363 | {"noformat", s_ignore, 0}, | |
364 | {"nolist", listing_list, 0}, /* Turn listing off */ | |
365 | {"nopage", listing_nopage, 0}, | |
366 | {"octa", cons, 16}, | |
367 | {"offset", s_struct, 0}, | |
368 | {"org", s_org, 0}, | |
369 | {"p2align", s_align_ptwo, 0}, | |
370 | {"p2alignw", s_align_ptwo, -2}, | |
371 | {"p2alignl", s_align_ptwo, -4}, | |
372 | {"page", listing_eject, 0}, | |
373 | {"plen", listing_psize, 0}, | |
374 | {"print", s_print, 0}, | |
375 | {"psize", listing_psize, 0}, /* set paper size */ | |
376 | {"purgem", s_purgem, 0}, | |
377 | {"quad", cons, 8}, | |
378 | {"rep", s_rept, 0}, | |
379 | {"rept", s_rept, 0}, | |
380 | {"rva", s_rva, 4}, | |
381 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ | |
382 | /* scl */ | |
383 | /* sect */ | |
384 | {"set", s_set, 0}, | |
385 | {"short", cons, 2}, | |
386 | {"single", float_cons, 'f'}, | |
387 | /* size */ | |
388 | {"space", s_space, 0}, | |
389 | {"skip", s_space, 0}, | |
390 | {"sleb128", s_leb128, 1}, | |
391 | {"spc", s_ignore, 0}, | |
392 | {"stabd", s_stab, 'd'}, | |
393 | {"stabn", s_stab, 'n'}, | |
394 | {"stabs", s_stab, 's'}, | |
395 | {"string", stringer, 1}, | |
396 | {"struct", s_struct, 0}, | |
397 | /* tag */ | |
398 | {"text", s_text, 0}, | |
399 | ||
400 | /* This is for gcc to use. It's only just been added (2/94), so gcc | |
401 | won't be able to use it for a while -- probably a year or more. | |
402 | But once this has been released, check with gcc maintainers | |
403 | before deleting it or even changing the spelling. */ | |
404 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, | |
405 | /* If we're folding case -- done for some targets, not necessarily | |
406 | all -- the above string in an input file will be converted to | |
407 | this one. Match it either way... */ | |
408 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, | |
409 | ||
410 | {"title", listing_title, 0}, /* Listing title */ | |
411 | {"ttl", listing_title, 0}, | |
412 | /* type */ | |
413 | {"uleb128", s_leb128, 0}, | |
414 | /* use */ | |
415 | /* val */ | |
416 | {"xcom", s_comm, 0}, | |
417 | {"xdef", s_globl, 0}, | |
418 | {"xref", s_ignore, 0}, | |
419 | {"xstabs", s_xstab, 's'}, | |
420 | {"word", cons, 2}, | |
421 | {"zero", s_space, 0}, | |
422 | {NULL} /* end sentinel */ | |
423 | }; | |
424 | ||
425 | static int pop_override_ok = 0; | |
426 | static const char *pop_table_name; | |
427 | ||
428 | void | |
429 | pop_insert (table) | |
430 | const pseudo_typeS *table; | |
431 | { | |
432 | const char *errtxt; | |
433 | const pseudo_typeS *pop; | |
434 | for (pop = table; pop->poc_name; pop++) | |
435 | { | |
436 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
437 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) | |
438 | as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name, | |
439 | errtxt); | |
440 | } | |
441 | } | |
442 | ||
443 | #ifndef md_pop_insert | |
444 | #define md_pop_insert() pop_insert(md_pseudo_table) | |
445 | #endif | |
446 | ||
447 | #ifndef obj_pop_insert | |
448 | #define obj_pop_insert() pop_insert(obj_pseudo_table) | |
449 | #endif | |
450 | ||
451 | static void | |
452 | pobegin () | |
453 | { | |
454 | po_hash = hash_new (); | |
455 | ||
456 | /* Do the target-specific pseudo ops. */ | |
457 | pop_table_name = "md"; | |
458 | md_pop_insert (); | |
459 | ||
460 | /* Now object specific. Skip any that were in the target table. */ | |
461 | pop_table_name = "obj"; | |
462 | pop_override_ok = 1; | |
463 | obj_pop_insert (); | |
464 | ||
465 | /* Now portable ones. Skip any that we've seen already. */ | |
466 | pop_table_name = "standard"; | |
467 | pop_insert (potable); | |
468 | } | |
469 | \f | |
470 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ | |
471 | if (ignore_input ()) \ | |
472 | { \ | |
473 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
474 | if (input_line_pointer == buffer_limit) \ | |
475 | break; \ | |
476 | continue; \ | |
477 | } | |
478 | ||
479 | ||
480 | /* This function is used when scrubbing the characters between #APP | |
481 | and #NO_APP. */ | |
482 | ||
483 | static char *scrub_string; | |
484 | static char *scrub_string_end; | |
485 | ||
486 | static int | |
2b47531b ILT |
487 | scrub_from_string (buf, buflen) |
488 | char *buf; | |
489 | int buflen; | |
252b5132 | 490 | { |
2b47531b ILT |
491 | int copy; |
492 | ||
493 | copy = scrub_string_end - scrub_string; | |
494 | if (copy > buflen) | |
495 | copy = buflen; | |
496 | memcpy (buf, scrub_string, copy); | |
497 | scrub_string += copy; | |
498 | return copy; | |
252b5132 RH |
499 | } |
500 | ||
501 | /* read_a_source_file() | |
502 | * | |
503 | * We read the file, putting things into a web that | |
504 | * represents what we have been reading. | |
505 | */ | |
506 | void | |
507 | read_a_source_file (name) | |
508 | char *name; | |
509 | { | |
510 | register char c; | |
511 | register char *s; /* string of symbol, '\0' appended */ | |
512 | register int temp; | |
513 | pseudo_typeS *pop; | |
514 | ||
515 | buffer = input_scrub_new_file (name); | |
516 | ||
517 | listing_file (name); | |
518 | listing_newline (NULL); | |
519 | register_dependency (name); | |
520 | ||
521 | /* Generate debugging information before we've read anything in to denote | |
522 | this file as the "main" source file and not a subordinate one | |
523 | (e.g. N_SO vs N_SOL in stabs). */ | |
524 | generate_file_debug (); | |
525 | ||
526 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) | |
527 | { /* We have another line to parse. */ | |
528 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
529 | contin: /* JF this goto is my fault I admit it. | |
530 | Someone brave please re-write the whole | |
531 | input section here? Pleeze??? */ | |
532 | while (input_line_pointer < buffer_limit) | |
533 | { | |
534 | /* We have more of this buffer to parse. */ | |
535 | ||
536 | /* | |
537 | * We now have input_line_pointer->1st char of next line. | |
538 | * If input_line_pointer [-1] == '\n' then we just | |
539 | * scanned another line: so bump line counters. | |
540 | */ | |
541 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) | |
542 | { | |
543 | #ifdef md_start_line_hook | |
544 | md_start_line_hook (); | |
545 | #endif | |
546 | ||
547 | if (input_line_pointer[-1] == '\n') | |
548 | bump_line_counters (); | |
549 | ||
550 | line_label = NULL; | |
551 | ||
552 | if (flag_m68k_mri | |
553 | #ifdef LABELS_WITHOUT_COLONS | |
554 | || 1 | |
555 | #endif | |
556 | ) | |
557 | { | |
558 | /* Text at the start of a line must be a label, we | |
559 | run down and stick a colon in. */ | |
560 | if (is_name_beginner (*input_line_pointer)) | |
561 | { | |
562 | char *line_start = input_line_pointer; | |
563 | char c; | |
564 | int mri_line_macro; | |
565 | ||
566 | LISTING_NEWLINE (); | |
567 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
568 | ||
569 | c = get_symbol_end (); | |
570 | ||
571 | /* In MRI mode, the EQU and MACRO pseudoops must | |
572 | be handled specially. */ | |
573 | mri_line_macro = 0; | |
574 | if (flag_m68k_mri) | |
575 | { | |
576 | char *rest = input_line_pointer + 1; | |
577 | ||
578 | if (*rest == ':') | |
579 | ++rest; | |
580 | if (*rest == ' ' || *rest == '\t') | |
581 | ++rest; | |
582 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
583 | || strncasecmp (rest, "SET", 3) == 0) | |
584 | && (rest[3] == ' ' || rest[3] == '\t')) | |
585 | { | |
586 | input_line_pointer = rest + 3; | |
587 | equals (line_start, | |
588 | strncasecmp (rest, "SET", 3) == 0); | |
589 | continue; | |
590 | } | |
591 | if (strncasecmp (rest, "MACRO", 5) == 0 | |
592 | && (rest[5] == ' ' | |
593 | || rest[5] == '\t' | |
594 | || is_end_of_line[(unsigned char) rest[5]])) | |
595 | mri_line_macro = 1; | |
596 | } | |
597 | ||
598 | /* In MRI mode, we need to handle the MACRO | |
599 | pseudo-op specially: we don't want to put the | |
600 | symbol in the symbol table. */ | |
601 | if (! mri_line_macro) | |
602 | line_label = colon (line_start); | |
603 | else | |
604 | line_label = symbol_create (line_start, | |
605 | absolute_section, | |
606 | (valueT) 0, | |
607 | &zero_address_frag); | |
608 | ||
609 | *input_line_pointer = c; | |
610 | if (c == ':') | |
611 | input_line_pointer++; | |
612 | } | |
613 | } | |
614 | } | |
615 | ||
616 | /* | |
617 | * We are at the begining of a line, or similar place. | |
618 | * We expect a well-formed assembler statement. | |
619 | * A "symbol-name:" is a statement. | |
620 | * | |
621 | * Depending on what compiler is used, the order of these tests | |
622 | * may vary to catch most common case 1st. | |
623 | * Each test is independent of all other tests at the (top) level. | |
624 | * PLEASE make a compiler that doesn't use this assembler. | |
625 | * It is crufty to waste a compiler's time encoding things for this | |
626 | * assembler, which then wastes more time decoding it. | |
627 | * (And communicating via (linear) files is silly! | |
628 | * If you must pass stuff, please pass a tree!) | |
629 | */ | |
630 | if ((c = *input_line_pointer++) == '\t' | |
631 | || c == ' ' | |
632 | || c == '\f' | |
633 | || c == 0) | |
634 | { | |
635 | c = *input_line_pointer++; | |
636 | } | |
637 | know (c != ' '); /* No further leading whitespace. */ | |
638 | ||
639 | #ifndef NO_LISTING | |
640 | /* If listing is on, and we are expanding a macro, then give | |
641 | the listing code the contents of the expanded line. */ | |
642 | if (listing) | |
643 | { | |
644 | if ((listing & LISTING_MACEXP) && macro_nest > 0) | |
645 | { | |
646 | char *copy; | |
647 | int len; | |
648 | ||
649 | /* Find the end of the current expanded macro line. */ | |
650 | for (s = input_line_pointer-1; *s ; ++s) | |
651 | if (is_end_of_line[(unsigned char) *s]) | |
652 | break; | |
653 | ||
654 | /* Copy it for safe keeping. Also give an indication of | |
655 | how much macro nesting is involved at this point. */ | |
656 | len = s - (input_line_pointer-1); | |
657 | copy = (char *) xmalloc (len + macro_nest + 2); | |
658 | memset (copy, '>', macro_nest); | |
659 | copy[macro_nest] = ' '; | |
660 | memcpy (copy + macro_nest + 1, input_line_pointer-1, len); | |
661 | copy[macro_nest+1+len] = '\0'; | |
662 | ||
663 | /* Install the line with the listing facility. */ | |
664 | listing_newline (copy); | |
665 | } | |
666 | else | |
667 | listing_newline (NULL); | |
668 | } | |
669 | #endif | |
670 | ||
671 | /* | |
672 | * C is the 1st significant character. | |
673 | * Input_line_pointer points after that character. | |
674 | */ | |
675 | if (is_name_beginner (c)) | |
676 | { | |
677 | /* want user-defined label or pseudo/opcode */ | |
678 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
679 | ||
680 | s = --input_line_pointer; | |
681 | c = get_symbol_end (); /* name's delimiter */ | |
682 | /* | |
683 | * C is character after symbol. | |
684 | * That character's place in the input line is now '\0'. | |
685 | * S points to the beginning of the symbol. | |
686 | * [In case of pseudo-op, s->'.'.] | |
687 | * Input_line_pointer->'\0' where c was. | |
688 | */ | |
689 | if (TC_START_LABEL(c, input_line_pointer)) | |
690 | { | |
691 | if (flag_m68k_mri) | |
692 | { | |
693 | char *rest = input_line_pointer + 1; | |
694 | ||
695 | /* In MRI mode, \tsym: set 0 is permitted. */ | |
696 | ||
697 | if (*rest == ':') | |
698 | ++rest; | |
699 | if (*rest == ' ' || *rest == '\t') | |
700 | ++rest; | |
701 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
702 | || strncasecmp (rest, "SET", 3) == 0) | |
703 | && (rest[3] == ' ' || rest[3] == '\t')) | |
704 | { | |
705 | input_line_pointer = rest + 3; | |
706 | equals (s, 1); | |
707 | continue; | |
708 | } | |
709 | } | |
710 | ||
711 | line_label = colon (s); /* user-defined label */ | |
712 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ | |
713 | /* Input_line_pointer->after ':'. */ | |
714 | SKIP_WHITESPACE (); | |
715 | ||
716 | ||
717 | } | |
718 | else if (c == '=' | |
719 | || ((c == ' ' || c == '\t') | |
720 | && input_line_pointer[1] == '=' | |
721 | #ifdef TC_EQUAL_IN_INSN | |
722 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
723 | #endif | |
724 | )) | |
725 | { | |
726 | equals (s, 1); | |
727 | demand_empty_rest_of_line (); | |
728 | } | |
729 | else | |
730 | { /* expect pseudo-op or machine instruction */ | |
731 | pop = NULL; | |
732 | ||
733 | #define IGNORE_OPCODE_CASE | |
734 | #ifdef IGNORE_OPCODE_CASE | |
735 | { | |
736 | char *s2 = s; | |
737 | while (*s2) | |
738 | { | |
739 | if (isupper ((unsigned char) *s2)) | |
740 | *s2 = tolower (*s2); | |
741 | s2++; | |
742 | } | |
743 | } | |
744 | #endif | |
745 | ||
746 | if (flag_m68k_mri | |
747 | #ifdef NO_PSEUDO_DOT | |
748 | || 1 | |
749 | #endif | |
750 | ) | |
751 | { | |
752 | /* The MRI assembler and the m88k use pseudo-ops | |
753 | without a period. */ | |
754 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
755 | if (pop != NULL && pop->poc_handler == NULL) | |
756 | pop = NULL; | |
757 | } | |
758 | ||
759 | if (pop != NULL | |
760 | || (! flag_m68k_mri && *s == '.')) | |
761 | { | |
762 | /* | |
763 | * PSEUDO - OP. | |
764 | * | |
765 | * WARNING: c has next char, which may be end-of-line. | |
766 | * We lookup the pseudo-op table with s+1 because we | |
767 | * already know that the pseudo-op begins with a '.'. | |
768 | */ | |
769 | ||
770 | if (pop == NULL) | |
771 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
772 | ||
773 | /* In MRI mode, we may need to insert an | |
774 | automatic alignment directive. What a hack | |
775 | this is. */ | |
776 | if (mri_pending_align | |
777 | && (pop == NULL | |
778 | || ! ((pop->poc_handler == cons | |
779 | && pop->poc_val == 1) | |
780 | || (pop->poc_handler == s_space | |
781 | && pop->poc_val == 1) | |
782 | #ifdef tc_conditional_pseudoop | |
783 | || tc_conditional_pseudoop (pop) | |
784 | #endif | |
785 | || pop->poc_handler == s_if | |
786 | || pop->poc_handler == s_ifdef | |
787 | || pop->poc_handler == s_ifc | |
788 | || pop->poc_handler == s_ifeqs | |
789 | || pop->poc_handler == s_else | |
790 | || pop->poc_handler == s_endif | |
791 | || pop->poc_handler == s_globl | |
792 | || pop->poc_handler == s_ignore))) | |
793 | { | |
794 | do_align (1, (char *) NULL, 0, 0); | |
795 | mri_pending_align = 0; | |
796 | if (line_label != NULL) | |
797 | { | |
2b47531b | 798 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
799 | S_SET_VALUE (line_label, frag_now_fix ()); |
800 | } | |
801 | } | |
802 | ||
803 | /* Print the error msg now, while we still can */ | |
804 | if (pop == NULL) | |
805 | { | |
806 | as_bad (_("Unknown pseudo-op: `%s'"), s); | |
807 | *input_line_pointer = c; | |
808 | s_ignore (0); | |
809 | continue; | |
810 | } | |
811 | ||
812 | /* Put it back for error messages etc. */ | |
813 | *input_line_pointer = c; | |
814 | /* The following skip of whitespace is compulsory. | |
815 | A well shaped space is sometimes all that separates | |
816 | keyword from operands. */ | |
817 | if (c == ' ' || c == '\t') | |
818 | input_line_pointer++; | |
819 | /* | |
820 | * Input_line is restored. | |
821 | * Input_line_pointer->1st non-blank char | |
822 | * after pseudo-operation. | |
823 | */ | |
824 | (*pop->poc_handler) (pop->poc_val); | |
825 | ||
826 | /* If that was .end, just get out now. */ | |
827 | if (pop->poc_handler == s_end) | |
828 | goto quit; | |
829 | } | |
830 | else | |
831 | { | |
1c32af22 | 832 | int inquote = 0, inescape = 0; |
252b5132 RH |
833 | |
834 | /* WARNING: c has char, which may be end-of-line. */ | |
835 | /* Also: input_line_pointer->`\0` where c was. */ | |
836 | *input_line_pointer = c; | |
837 | while (!is_end_of_line[(unsigned char) *input_line_pointer] | |
838 | || inquote | |
839 | #ifdef TC_EOL_IN_INSN | |
840 | || TC_EOL_IN_INSN (input_line_pointer) | |
841 | #endif | |
842 | ) | |
843 | { | |
844 | if (flag_m68k_mri && *input_line_pointer == '\'') | |
845 | inquote = ! inquote; | |
1c32af22 RH |
846 | #ifdef QUOTES_IN_INSN |
847 | if (inescape) | |
848 | inescape = 0; | |
849 | else if (*input_line_pointer == '"') | |
850 | inquote = ! inquote; | |
851 | else if (*input_line_pointer == '\\') | |
852 | inescape = 1; | |
853 | #endif | |
252b5132 RH |
854 | input_line_pointer++; |
855 | } | |
856 | ||
857 | c = *input_line_pointer; | |
858 | *input_line_pointer = '\0'; | |
859 | ||
860 | generate_lineno_debug (); | |
861 | ||
862 | if (macro_defined) | |
863 | { | |
864 | sb out; | |
865 | const char *err; | |
866 | ||
867 | if (check_macro (s, &out, '\0', &err)) | |
868 | { | |
869 | if (err != NULL) | |
870 | as_bad (err); | |
871 | *input_line_pointer++ = c; | |
872 | input_scrub_include_sb (&out, | |
873 | input_line_pointer); | |
874 | sb_kill (&out); | |
875 | buffer_limit = | |
876 | input_scrub_next_buffer (&input_line_pointer); | |
877 | continue; | |
878 | } | |
879 | } | |
880 | ||
881 | if (mri_pending_align) | |
882 | { | |
883 | do_align (1, (char *) NULL, 0, 0); | |
884 | mri_pending_align = 0; | |
885 | if (line_label != NULL) | |
886 | { | |
2b47531b | 887 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
888 | S_SET_VALUE (line_label, frag_now_fix ()); |
889 | } | |
890 | } | |
891 | ||
892 | md_assemble (s); /* Assemble 1 instruction. */ | |
893 | ||
894 | *input_line_pointer++ = c; | |
895 | ||
896 | /* We resume loop AFTER the end-of-line from | |
897 | this instruction. */ | |
898 | } /* if (*s=='.') */ | |
899 | } /* if c==':' */ | |
900 | continue; | |
901 | } /* if (is_name_beginner(c) */ | |
902 | ||
903 | ||
904 | /* Empty statement? */ | |
905 | if (is_end_of_line[(unsigned char) c]) | |
906 | continue; | |
907 | ||
908 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) | |
909 | && isdigit ((unsigned char) c)) | |
910 | { | |
911 | /* local label ("4:") */ | |
912 | char *backup = input_line_pointer; | |
913 | ||
914 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
915 | ||
916 | temp = c - '0'; | |
917 | ||
918 | while (isdigit ((unsigned char) *input_line_pointer)) | |
919 | { | |
920 | temp = (temp * 10) + *input_line_pointer - '0'; | |
921 | ++input_line_pointer; | |
922 | } /* read the whole number */ | |
923 | ||
924 | if (LOCAL_LABELS_DOLLAR | |
925 | && *input_line_pointer == '$' | |
926 | && *(input_line_pointer + 1) == ':') | |
927 | { | |
928 | input_line_pointer += 2; | |
929 | ||
930 | if (dollar_label_defined (temp)) | |
931 | { | |
932 | as_fatal (_("label \"%d$\" redefined"), temp); | |
933 | } | |
934 | ||
935 | define_dollar_label (temp); | |
936 | colon (dollar_label_name (temp, 0)); | |
937 | continue; | |
938 | } | |
939 | ||
940 | if (LOCAL_LABELS_FB | |
941 | && *input_line_pointer++ == ':') | |
942 | { | |
943 | fb_label_instance_inc (temp); | |
944 | colon (fb_label_name (temp, 0)); | |
945 | continue; | |
946 | } | |
947 | ||
948 | input_line_pointer = backup; | |
949 | } /* local label ("4:") */ | |
950 | ||
951 | if (c && strchr (line_comment_chars, c)) | |
952 | { /* Its a comment. Better say APP or NO_APP */ | |
953 | char *ends; | |
954 | char *new_buf; | |
955 | char *new_tmp; | |
956 | unsigned int new_length; | |
957 | char *tmp_buf = 0; | |
958 | ||
959 | bump_line_counters (); | |
960 | s = input_line_pointer; | |
961 | if (strncmp (s, "APP\n", 4)) | |
962 | continue; /* We ignore it */ | |
963 | s += 4; | |
964 | ||
965 | ends = strstr (s, "#NO_APP\n"); | |
966 | ||
967 | if (!ends) | |
968 | { | |
969 | unsigned int tmp_len; | |
970 | unsigned int num; | |
971 | ||
972 | /* The end of the #APP wasn't in this buffer. We | |
973 | keep reading in buffers until we find the #NO_APP | |
974 | that goes with this #APP There is one. The specs | |
975 | guarentee it. . . */ | |
976 | tmp_len = buffer_limit - s; | |
977 | tmp_buf = xmalloc (tmp_len + 1); | |
978 | memcpy (tmp_buf, s, tmp_len); | |
979 | do | |
980 | { | |
981 | new_tmp = input_scrub_next_buffer (&buffer); | |
982 | if (!new_tmp) | |
983 | break; | |
984 | else | |
985 | buffer_limit = new_tmp; | |
986 | input_line_pointer = buffer; | |
987 | ends = strstr (buffer, "#NO_APP\n"); | |
988 | if (ends) | |
989 | num = ends - buffer; | |
990 | else | |
991 | num = buffer_limit - buffer; | |
992 | ||
993 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
994 | memcpy (tmp_buf + tmp_len, buffer, num); | |
995 | tmp_len += num; | |
996 | } | |
997 | while (!ends); | |
998 | ||
999 | input_line_pointer = ends ? ends + 8 : NULL; | |
1000 | ||
1001 | s = tmp_buf; | |
1002 | ends = s + tmp_len; | |
1003 | ||
1004 | } | |
1005 | else | |
1006 | { | |
1007 | input_line_pointer = ends + 8; | |
1008 | } | |
1009 | ||
1010 | scrub_string = s; | |
1011 | scrub_string_end = ends; | |
1012 | ||
1013 | new_length = ends - s; | |
1014 | new_buf = (char *) xmalloc (new_length); | |
1015 | new_tmp = new_buf; | |
1016 | for (;;) | |
1017 | { | |
1018 | int space; | |
1019 | int size; | |
1020 | ||
1021 | space = (new_buf + new_length) - new_tmp; | |
1022 | size = do_scrub_chars (scrub_from_string, new_tmp, space); | |
1023 | ||
1024 | if (size < space) | |
1025 | { | |
1026 | new_tmp += size; | |
1027 | break; | |
1028 | } | |
1029 | ||
1030 | new_buf = xrealloc (new_buf, new_length + 100); | |
1031 | new_tmp = new_buf + new_length; | |
1032 | new_length += 100; | |
1033 | } | |
1034 | ||
1035 | if (tmp_buf) | |
1036 | free (tmp_buf); | |
1037 | old_buffer = buffer; | |
1038 | old_input = input_line_pointer; | |
1039 | old_limit = buffer_limit; | |
1040 | buffer = new_buf; | |
1041 | input_line_pointer = new_buf; | |
1042 | buffer_limit = new_tmp; | |
1043 | continue; | |
1044 | } | |
1045 | ||
1046 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
1047 | ||
1048 | #ifdef tc_unrecognized_line | |
1049 | if (tc_unrecognized_line (c)) | |
1050 | continue; | |
1051 | #endif | |
1052 | ||
1053 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
1054 | input_line_pointer--; /* Report unknown char as ignored. */ | |
1055 | ignore_rest_of_line (); | |
1056 | } /* while (input_line_pointer<buffer_limit) */ | |
1057 | ||
1058 | #ifdef md_after_pass_hook | |
1059 | md_after_pass_hook (); | |
1060 | #endif | |
1061 | ||
1062 | if (old_buffer) | |
1063 | { | |
1064 | free (buffer); | |
1065 | bump_line_counters (); | |
1066 | if (old_input != 0) | |
1067 | { | |
1068 | buffer = old_buffer; | |
1069 | input_line_pointer = old_input; | |
1070 | buffer_limit = old_limit; | |
1071 | old_buffer = 0; | |
1072 | goto contin; | |
1073 | } | |
1074 | } | |
1075 | } /* while (more buffers to scan) */ | |
1076 | ||
1077 | quit: | |
1078 | ||
1079 | #ifdef md_cleanup | |
1080 | md_cleanup(); | |
1081 | #endif | |
1082 | input_scrub_close (); /* Close the input file */ | |
1083 | } | |
1084 | ||
1085 | /* For most MRI pseudo-ops, the line actually ends at the first | |
1086 | nonquoted space. This function looks for that point, stuffs a null | |
1087 | in, and sets *STOPCP to the character that used to be there, and | |
1088 | returns the location. | |
1089 | ||
1090 | Until I hear otherwise, I am going to assume that this is only true | |
1091 | for the m68k MRI assembler. */ | |
1092 | ||
1093 | char * | |
1094 | mri_comment_field (stopcp) | |
1095 | char *stopcp; | |
1096 | { | |
1097 | #ifdef TC_M68K | |
1098 | ||
1099 | char *s; | |
1100 | int inquote = 0; | |
1101 | ||
1102 | know (flag_m68k_mri); | |
1103 | ||
1104 | for (s = input_line_pointer; | |
1105 | ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t') | |
1106 | || inquote); | |
1107 | s++) | |
1108 | { | |
1109 | if (*s == '\'') | |
1110 | inquote = ! inquote; | |
1111 | } | |
1112 | *stopcp = *s; | |
1113 | *s = '\0'; | |
1114 | return s; | |
1115 | ||
1116 | #else | |
1117 | ||
1118 | char *s; | |
1119 | ||
1120 | for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++) | |
1121 | ; | |
1122 | *stopcp = *s; | |
1123 | *s = '\0'; | |
1124 | return s; | |
1125 | ||
1126 | #endif | |
1127 | ||
1128 | } | |
1129 | ||
1130 | /* Skip to the end of an MRI comment field. */ | |
1131 | ||
1132 | void | |
1133 | mri_comment_end (stop, stopc) | |
1134 | char *stop; | |
1135 | int stopc; | |
1136 | { | |
1137 | know (flag_mri); | |
1138 | ||
1139 | input_line_pointer = stop; | |
1140 | *stop = stopc; | |
1141 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1142 | ++input_line_pointer; | |
1143 | } | |
1144 | ||
1145 | void | |
1146 | s_abort (ignore) | |
1147 | int ignore; | |
1148 | { | |
1149 | as_fatal (_(".abort detected. Abandoning ship.")); | |
1150 | } | |
1151 | ||
1152 | /* Guts of .align directive. N is the power of two to which to align. | |
1153 | FILL may be NULL, or it may point to the bytes of the fill pattern. | |
1154 | LEN is the length of whatever FILL points to, if anything. MAX is | |
1155 | the maximum number of characters to skip when doing the alignment, | |
1156 | or 0 if there is no maximum. */ | |
1157 | ||
1158 | static void | |
1159 | do_align (n, fill, len, max) | |
1160 | int n; | |
1161 | char *fill; | |
1162 | int len; | |
1163 | int max; | |
1164 | { | |
1165 | char default_fill; | |
1166 | ||
1167 | #ifdef md_do_align | |
1168 | md_do_align (n, fill, len, max, just_record_alignment); | |
1169 | #endif | |
1170 | ||
1171 | if (fill == NULL) | |
1172 | { | |
1173 | int maybe_text; | |
1174 | ||
1175 | #ifdef BFD_ASSEMBLER | |
1176 | if ((bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0) | |
1177 | maybe_text = 1; | |
1178 | else | |
1179 | maybe_text = 0; | |
1180 | #else | |
1181 | if (now_seg != data_section && now_seg != bss_section) | |
1182 | maybe_text = 1; | |
1183 | else | |
1184 | maybe_text = 0; | |
1185 | #endif | |
1186 | ||
1187 | if (maybe_text) | |
1188 | default_fill = NOP_OPCODE; | |
1189 | else | |
1190 | default_fill = 0; | |
1191 | fill = &default_fill; | |
1192 | len = 1; | |
1193 | } | |
1194 | ||
1195 | /* Only make a frag if we HAVE to. . . */ | |
1196 | if (n != 0 && !need_pass_2) | |
1197 | { | |
1198 | if (len <= 1) | |
1199 | frag_align (n, *fill, max); | |
1200 | else | |
1201 | frag_align_pattern (n, fill, len, max); | |
1202 | } | |
1203 | ||
1204 | #ifdef md_do_align | |
1205 | just_record_alignment: | |
1206 | #endif | |
1207 | ||
1208 | record_alignment (now_seg, n); | |
1209 | } | |
1210 | ||
1211 | /* Handle the .align pseudo-op. A positive ARG is a default alignment | |
1212 | (in bytes). A negative ARG is the negative of the length of the | |
1213 | fill pattern. BYTES_P is non-zero if the alignment value should be | |
1214 | interpreted as the byte boundary, rather than the power of 2. */ | |
1215 | ||
1216 | static void | |
1217 | s_align (arg, bytes_p) | |
1218 | int arg; | |
1219 | int bytes_p; | |
1220 | { | |
1221 | register unsigned int align; | |
1222 | char *stop = NULL; | |
1223 | char stopc; | |
1224 | offsetT fill = 0; | |
1225 | int max; | |
1226 | int fill_p; | |
1227 | ||
1228 | if (flag_mri) | |
1229 | stop = mri_comment_field (&stopc); | |
1230 | ||
1231 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
1232 | { | |
1233 | if (arg < 0) | |
1234 | align = 0; | |
1235 | else | |
1236 | align = arg; /* Default value from pseudo-op table */ | |
1237 | } | |
1238 | else | |
1239 | { | |
1240 | align = get_absolute_expression (); | |
1241 | SKIP_WHITESPACE (); | |
1242 | } | |
1243 | ||
1244 | if (bytes_p) | |
1245 | { | |
1246 | /* Convert to a power of 2. */ | |
1247 | if (align != 0) | |
1248 | { | |
1249 | unsigned int i; | |
1250 | ||
1251 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
1252 | ; | |
1253 | if (align != 1) | |
1254 | as_bad (_("Alignment not a power of 2")); | |
1255 | align = i; | |
1256 | } | |
1257 | } | |
1258 | ||
1259 | if (align > 15) | |
1260 | { | |
1261 | align = 15; | |
1262 | as_bad (_("Alignment too large: %u assumed"), align); | |
1263 | } | |
1264 | ||
1265 | if (*input_line_pointer != ',') | |
1266 | { | |
1267 | fill_p = 0; | |
1268 | max = 0; | |
1269 | } | |
1270 | else | |
1271 | { | |
1272 | ++input_line_pointer; | |
1273 | if (*input_line_pointer == ',') | |
1274 | fill_p = 0; | |
1275 | else | |
1276 | { | |
1277 | fill = get_absolute_expression (); | |
1278 | SKIP_WHITESPACE (); | |
1279 | fill_p = 1; | |
1280 | } | |
1281 | ||
1282 | if (*input_line_pointer != ',') | |
1283 | max = 0; | |
1284 | else | |
1285 | { | |
1286 | ++input_line_pointer; | |
1287 | max = get_absolute_expression (); | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | if (! fill_p) | |
1292 | { | |
1293 | if (arg < 0) | |
1294 | as_warn (_("expected fill pattern missing")); | |
1295 | do_align (align, (char *) NULL, 0, max); | |
1296 | } | |
1297 | else | |
1298 | { | |
1299 | int fill_len; | |
1300 | ||
1301 | if (arg >= 0) | |
1302 | fill_len = 1; | |
1303 | else | |
1304 | fill_len = - arg; | |
1305 | if (fill_len <= 1) | |
1306 | { | |
1307 | char fill_char; | |
1308 | ||
1309 | fill_char = fill; | |
1310 | do_align (align, &fill_char, fill_len, max); | |
1311 | } | |
1312 | else | |
1313 | { | |
1314 | char ab[16]; | |
1315 | ||
1316 | if ((size_t) fill_len > sizeof ab) | |
1317 | abort (); | |
1318 | md_number_to_chars (ab, fill, fill_len); | |
1319 | do_align (align, ab, fill_len, max); | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | demand_empty_rest_of_line (); | |
1324 | ||
1325 | if (flag_mri) | |
1326 | mri_comment_end (stop, stopc); | |
1327 | } | |
1328 | ||
1329 | /* Handle the .align pseudo-op on machines where ".align 4" means | |
1330 | align to a 4 byte boundary. */ | |
1331 | ||
1332 | void | |
1333 | s_align_bytes (arg) | |
1334 | int arg; | |
1335 | { | |
1336 | s_align (arg, 1); | |
1337 | } | |
1338 | ||
1339 | /* Handle the .align pseudo-op on machines where ".align 4" means align | |
1340 | to a 2**4 boundary. */ | |
1341 | ||
1342 | void | |
1343 | s_align_ptwo (arg) | |
1344 | int arg; | |
1345 | { | |
1346 | s_align (arg, 0); | |
1347 | } | |
1348 | ||
1349 | void | |
1350 | s_comm (ignore) | |
1351 | int ignore; | |
1352 | { | |
1353 | register char *name; | |
1354 | register char c; | |
1355 | register char *p; | |
1356 | offsetT temp; | |
1357 | register symbolS *symbolP; | |
1358 | char *stop = NULL; | |
1359 | char stopc; | |
1360 | ||
1361 | if (flag_mri) | |
1362 | stop = mri_comment_field (&stopc); | |
1363 | ||
1364 | name = input_line_pointer; | |
1365 | c = get_symbol_end (); | |
1366 | /* just after name is now '\0' */ | |
1367 | p = input_line_pointer; | |
1368 | *p = c; | |
1369 | SKIP_WHITESPACE (); | |
1370 | if (*input_line_pointer != ',') | |
1371 | { | |
1372 | as_bad (_("Expected comma after symbol-name: rest of line ignored.")); | |
1373 | ignore_rest_of_line (); | |
1374 | if (flag_mri) | |
1375 | mri_comment_end (stop, stopc); | |
1376 | return; | |
1377 | } | |
1378 | input_line_pointer++; /* skip ',' */ | |
1379 | if ((temp = get_absolute_expression ()) < 0) | |
1380 | { | |
1381 | as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) temp); | |
1382 | ignore_rest_of_line (); | |
1383 | if (flag_mri) | |
1384 | mri_comment_end (stop, stopc); | |
1385 | return; | |
1386 | } | |
1387 | *p = 0; | |
1388 | symbolP = symbol_find_or_make (name); | |
1389 | *p = c; | |
1390 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
1391 | { | |
1392 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
1393 | S_GET_NAME (symbolP)); | |
1394 | ignore_rest_of_line (); | |
1395 | if (flag_mri) | |
1396 | mri_comment_end (stop, stopc); | |
1397 | return; | |
1398 | } | |
1399 | if (S_GET_VALUE (symbolP)) | |
1400 | { | |
1401 | if (S_GET_VALUE (symbolP) != (valueT) temp) | |
1402 | as_bad (_("Length of .comm \"%s\" is already %ld. Not changed to %ld."), | |
1403 | S_GET_NAME (symbolP), | |
1404 | (long) S_GET_VALUE (symbolP), | |
1405 | (long) temp); | |
1406 | } | |
1407 | else | |
1408 | { | |
1409 | S_SET_VALUE (symbolP, (valueT) temp); | |
1410 | S_SET_EXTERNAL (symbolP); | |
1411 | } | |
1412 | #ifdef OBJ_VMS | |
1413 | { | |
1414 | extern int flag_one; | |
1415 | if ( (!temp) || !flag_one) | |
1416 | S_GET_OTHER(symbolP) = const_flag; | |
1417 | } | |
1418 | #endif /* not OBJ_VMS */ | |
1419 | know (symbolP->sy_frag == &zero_address_frag); | |
1420 | ||
1421 | demand_empty_rest_of_line (); | |
1422 | ||
1423 | if (flag_mri) | |
1424 | mri_comment_end (stop, stopc); | |
1425 | } /* s_comm() */ | |
1426 | ||
1427 | /* The MRI COMMON pseudo-op. We handle this by creating a common | |
1428 | symbol with the appropriate name. We make s_space do the right | |
1429 | thing by increasing the size. */ | |
1430 | ||
1431 | void | |
1432 | s_mri_common (small) | |
1433 | int small; | |
1434 | { | |
1435 | char *name; | |
1436 | char c; | |
1437 | char *alc = NULL; | |
1438 | symbolS *sym; | |
1439 | offsetT align; | |
1440 | char *stop = NULL; | |
1441 | char stopc; | |
1442 | ||
1443 | if (! flag_mri) | |
1444 | { | |
1445 | s_comm (0); | |
1446 | return; | |
1447 | } | |
1448 | ||
1449 | stop = mri_comment_field (&stopc); | |
1450 | ||
1451 | SKIP_WHITESPACE (); | |
1452 | ||
1453 | name = input_line_pointer; | |
1454 | if (! isdigit ((unsigned char) *name)) | |
1455 | c = get_symbol_end (); | |
1456 | else | |
1457 | { | |
1458 | do | |
1459 | { | |
1460 | ++input_line_pointer; | |
1461 | } | |
1462 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1463 | c = *input_line_pointer; | |
1464 | *input_line_pointer = '\0'; | |
1465 | ||
1466 | if (line_label != NULL) | |
1467 | { | |
1468 | alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) | |
1469 | + (input_line_pointer - name) | |
1470 | + 1); | |
1471 | sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); | |
1472 | name = alc; | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | sym = symbol_find_or_make (name); | |
1477 | *input_line_pointer = c; | |
1478 | if (alc != NULL) | |
1479 | free (alc); | |
1480 | ||
1481 | if (*input_line_pointer != ',') | |
1482 | align = 0; | |
1483 | else | |
1484 | { | |
1485 | ++input_line_pointer; | |
1486 | align = get_absolute_expression (); | |
1487 | } | |
1488 | ||
1489 | if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym)) | |
1490 | { | |
1491 | as_bad (_("attempt to re-define symbol `%s'"), S_GET_NAME (sym)); | |
1492 | ignore_rest_of_line (); | |
1493 | mri_comment_end (stop, stopc); | |
1494 | return; | |
1495 | } | |
1496 | ||
1497 | S_SET_EXTERNAL (sym); | |
1498 | mri_common_symbol = sym; | |
1499 | ||
1500 | #ifdef S_SET_ALIGN | |
1501 | if (align != 0) | |
1502 | S_SET_ALIGN (sym, align); | |
1503 | #endif | |
1504 | ||
1505 | if (line_label != NULL) | |
1506 | { | |
2b47531b ILT |
1507 | expressionS exp; |
1508 | exp.X_op = O_symbol; | |
1509 | exp.X_add_symbol = sym; | |
1510 | exp.X_add_number = 0; | |
1511 | symbol_set_value_expression (line_label, &exp); | |
1512 | symbol_set_frag (line_label, &zero_address_frag); | |
252b5132 RH |
1513 | S_SET_SEGMENT (line_label, expr_section); |
1514 | } | |
1515 | ||
1516 | /* FIXME: We just ignore the small argument, which distinguishes | |
1517 | COMMON and COMMON.S. I don't know what we can do about it. */ | |
1518 | ||
1519 | /* Ignore the type and hptype. */ | |
1520 | if (*input_line_pointer == ',') | |
1521 | input_line_pointer += 2; | |
1522 | if (*input_line_pointer == ',') | |
1523 | input_line_pointer += 2; | |
1524 | ||
1525 | demand_empty_rest_of_line (); | |
1526 | ||
1527 | mri_comment_end (stop, stopc); | |
1528 | } | |
1529 | ||
1530 | void | |
1531 | s_data (ignore) | |
1532 | int ignore; | |
1533 | { | |
1534 | segT section; | |
1535 | register int temp; | |
1536 | ||
1537 | temp = get_absolute_expression (); | |
1538 | if (flag_readonly_data_in_text) | |
1539 | { | |
1540 | section = text_section; | |
1541 | temp += 1000; | |
1542 | } | |
1543 | else | |
1544 | section = data_section; | |
1545 | ||
1546 | subseg_set (section, (subsegT) temp); | |
1547 | ||
1548 | #ifdef OBJ_VMS | |
1549 | const_flag = 0; | |
1550 | #endif | |
1551 | demand_empty_rest_of_line (); | |
1552 | } | |
1553 | ||
1554 | /* Handle the .appfile pseudo-op. This is automatically generated by | |
1555 | do_scrub_chars when a preprocessor # line comment is seen with a | |
1556 | file name. This default definition may be overridden by the object | |
1557 | or CPU specific pseudo-ops. This function is also the default | |
1558 | definition for .file; the APPFILE argument is 1 for .appfile, 0 for | |
1559 | .file. */ | |
1560 | ||
1561 | void | |
1562 | s_app_file (appfile) | |
1563 | int appfile; | |
1564 | { | |
1565 | register char *s; | |
1566 | int length; | |
1567 | ||
1568 | /* Some assemblers tolerate immediately following '"' */ | |
1569 | if ((s = demand_copy_string (&length)) != 0) | |
1570 | { | |
1571 | /* If this is a fake .appfile, a fake newline was inserted into | |
1572 | the buffer. Passing -2 to new_logical_line tells it to | |
1573 | account for it. */ | |
1574 | int may_omit | |
1575 | = (! new_logical_line (s, appfile ? -2 : -1) && appfile); | |
1576 | ||
1577 | /* In MRI mode, the preprocessor may have inserted an extraneous | |
1578 | backquote. */ | |
1579 | if (flag_m68k_mri | |
1580 | && *input_line_pointer == '\'' | |
1581 | && is_end_of_line[(unsigned char) input_line_pointer[1]]) | |
1582 | ++input_line_pointer; | |
1583 | ||
1584 | demand_empty_rest_of_line (); | |
1585 | if (! may_omit) | |
1586 | { | |
1587 | #ifdef LISTING | |
1588 | if (listing) | |
1589 | listing_source_file (s); | |
1590 | #endif | |
1591 | register_dependency (s); | |
1592 | #ifdef obj_app_file | |
1593 | obj_app_file (s); | |
1594 | #endif | |
1595 | } | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | /* Handle the .appline pseudo-op. This is automatically generated by | |
1600 | do_scrub_chars when a preprocessor # line comment is seen. This | |
1601 | default definition may be overridden by the object or CPU specific | |
1602 | pseudo-ops. */ | |
1603 | ||
1604 | void | |
1605 | s_app_line (ignore) | |
1606 | int ignore; | |
1607 | { | |
1608 | int l; | |
1609 | ||
1610 | /* The given number is that of the next line. */ | |
1611 | l = get_absolute_expression () - 1; | |
1612 | if (l < 0) | |
1613 | /* Some of the back ends can't deal with non-positive line numbers. | |
1614 | Besides, it's silly. */ | |
1615 | as_warn (_("Line numbers must be positive; line number %d rejected."), l+1); | |
1616 | else | |
1617 | { | |
1618 | new_logical_line ((char *) NULL, l); | |
1619 | #ifdef LISTING | |
1620 | if (listing) | |
1621 | listing_source_line (l); | |
1622 | #endif | |
1623 | } | |
1624 | demand_empty_rest_of_line (); | |
1625 | } | |
1626 | ||
1627 | /* Handle the .end pseudo-op. Actually, the real work is done in | |
1628 | read_a_source_file. */ | |
1629 | ||
1630 | void | |
1631 | s_end (ignore) | |
1632 | int ignore; | |
1633 | { | |
1634 | if (flag_mri) | |
1635 | { | |
1636 | /* The MRI assembler permits the start symbol to follow .end, | |
1637 | but we don't support that. */ | |
1638 | SKIP_WHITESPACE (); | |
1639 | if (! is_end_of_line[(unsigned char) *input_line_pointer] | |
1640 | && *input_line_pointer != '*' | |
1641 | && *input_line_pointer != '!') | |
1642 | as_warn (_("start address not supported")); | |
1643 | } | |
1644 | } | |
1645 | ||
1646 | /* Handle the .err pseudo-op. */ | |
1647 | ||
1648 | void | |
1649 | s_err (ignore) | |
1650 | int ignore; | |
1651 | { | |
1652 | as_bad (_(".err encountered")); | |
1653 | demand_empty_rest_of_line (); | |
1654 | } | |
1655 | ||
1656 | /* Handle the MRI fail pseudo-op. */ | |
1657 | ||
1658 | void | |
1659 | s_fail (ignore) | |
1660 | int ignore; | |
1661 | { | |
1662 | offsetT temp; | |
1663 | char *stop = NULL; | |
1664 | char stopc; | |
1665 | ||
1666 | if (flag_mri) | |
1667 | stop = mri_comment_field (&stopc); | |
1668 | ||
1669 | temp = get_absolute_expression (); | |
1670 | if (temp >= 500) | |
1671 | as_warn (_(".fail %ld encountered"), (long) temp); | |
1672 | else | |
1673 | as_bad (_(".fail %ld encountered"), (long) temp); | |
1674 | ||
1675 | demand_empty_rest_of_line (); | |
1676 | ||
1677 | if (flag_mri) | |
1678 | mri_comment_end (stop, stopc); | |
1679 | } | |
1680 | ||
1681 | void | |
1682 | s_fill (ignore) | |
1683 | int ignore; | |
1684 | { | |
1685 | expressionS rep_exp; | |
1686 | long size = 1; | |
1687 | register long fill = 0; | |
1688 | char *p; | |
1689 | ||
1690 | #ifdef md_flush_pending_output | |
1691 | md_flush_pending_output (); | |
1692 | #endif | |
1693 | ||
1694 | get_known_segmented_expression (&rep_exp); | |
1695 | if (*input_line_pointer == ',') | |
1696 | { | |
1697 | input_line_pointer++; | |
1698 | size = get_absolute_expression (); | |
1699 | if (*input_line_pointer == ',') | |
1700 | { | |
1701 | input_line_pointer++; | |
1702 | fill = get_absolute_expression (); | |
1703 | } | |
1704 | } | |
1705 | ||
1706 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ | |
1707 | #define BSD_FILL_SIZE_CROCK_8 (8) | |
1708 | if (size > BSD_FILL_SIZE_CROCK_8) | |
1709 | { | |
1710 | as_warn (_(".fill size clamped to %d."), BSD_FILL_SIZE_CROCK_8); | |
1711 | size = BSD_FILL_SIZE_CROCK_8; | |
1712 | } | |
1713 | if (size < 0) | |
1714 | { | |
1715 | as_warn (_("Size negative: .fill ignored.")); | |
1716 | size = 0; | |
1717 | } | |
1718 | else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0) | |
1719 | { | |
1720 | if (rep_exp.X_add_number < 0) | |
1721 | as_warn (_("Repeat < 0, .fill ignored")); | |
1722 | size = 0; | |
1723 | } | |
1724 | ||
1725 | if (size && !need_pass_2) | |
1726 | { | |
1727 | if (rep_exp.X_op == O_constant) | |
1728 | { | |
1729 | p = frag_var (rs_fill, (int) size, (int) size, | |
1730 | (relax_substateT) 0, (symbolS *) 0, | |
1731 | (offsetT) rep_exp.X_add_number, | |
1732 | (char *) 0); | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | /* We don't have a constant repeat count, so we can't use | |
1737 | rs_fill. We can get the same results out of rs_space, | |
1738 | but its argument is in bytes, so we must multiply the | |
1739 | repeat count by size. */ | |
1740 | ||
1741 | symbolS *rep_sym; | |
1742 | rep_sym = make_expr_symbol (&rep_exp); | |
1743 | if (size != 1) | |
1744 | { | |
1745 | expressionS size_exp; | |
1746 | size_exp.X_op = O_constant; | |
1747 | size_exp.X_add_number = size; | |
1748 | ||
1749 | rep_exp.X_op = O_multiply; | |
1750 | rep_exp.X_add_symbol = rep_sym; | |
1751 | rep_exp.X_op_symbol = make_expr_symbol (&size_exp); | |
1752 | rep_exp.X_add_number = 0; | |
1753 | rep_sym = make_expr_symbol (&rep_exp); | |
1754 | } | |
1755 | ||
1756 | p = frag_var (rs_space, (int) size, (int) size, | |
1757 | (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0); | |
1758 | } | |
1759 | memset (p, 0, (unsigned int) size); | |
1760 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX | |
1761 | * flavoured AS. The following bizzare behaviour is to be | |
1762 | * compatible with above. I guess they tried to take up to 8 | |
1763 | * bytes from a 4-byte expression and they forgot to sign | |
1764 | * extend. Un*x Sux. */ | |
1765 | #define BSD_FILL_SIZE_CROCK_4 (4) | |
1766 | md_number_to_chars (p, (valueT) fill, | |
1767 | (size > BSD_FILL_SIZE_CROCK_4 | |
1768 | ? BSD_FILL_SIZE_CROCK_4 | |
1769 | : (int) size)); | |
1770 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
1771 | * but emits no error message because it seems a legal thing to do. | |
1772 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
1773 | */ | |
1774 | } | |
1775 | demand_empty_rest_of_line (); | |
1776 | } | |
1777 | ||
1778 | void | |
1779 | s_globl (ignore) | |
1780 | int ignore; | |
1781 | { | |
1782 | char *name; | |
1783 | int c; | |
1784 | symbolS *symbolP; | |
1785 | char *stop = NULL; | |
1786 | char stopc; | |
1787 | ||
1788 | if (flag_mri) | |
1789 | stop = mri_comment_field (&stopc); | |
1790 | ||
1791 | do | |
1792 | { | |
1793 | name = input_line_pointer; | |
1794 | c = get_symbol_end (); | |
1795 | symbolP = symbol_find_or_make (name); | |
58b5739a RH |
1796 | S_SET_EXTERNAL (symbolP); |
1797 | ||
252b5132 RH |
1798 | *input_line_pointer = c; |
1799 | SKIP_WHITESPACE (); | |
58b5739a | 1800 | c = *input_line_pointer; |
252b5132 RH |
1801 | if (c == ',') |
1802 | { | |
1803 | input_line_pointer++; | |
1804 | SKIP_WHITESPACE (); | |
1805 | if (*input_line_pointer == '\n') | |
1806 | c = '\n'; | |
1807 | } | |
1808 | } | |
1809 | while (c == ','); | |
1810 | ||
1811 | demand_empty_rest_of_line (); | |
1812 | ||
1813 | if (flag_mri) | |
1814 | mri_comment_end (stop, stopc); | |
1815 | } | |
1816 | ||
1817 | /* Handle the MRI IRP and IRPC pseudo-ops. */ | |
1818 | ||
1819 | void | |
1820 | s_irp (irpc) | |
1821 | int irpc; | |
1822 | { | |
1823 | char *file; | |
1824 | unsigned int line; | |
1825 | sb s; | |
1826 | const char *err; | |
1827 | sb out; | |
1828 | ||
1829 | as_where (&file, &line); | |
1830 | ||
1831 | sb_new (&s); | |
1832 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1833 | sb_add_char (&s, *input_line_pointer++); | |
1834 | ||
1835 | sb_new (&out); | |
1836 | ||
1837 | err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); | |
1838 | if (err != NULL) | |
1839 | as_bad_where (file, line, "%s", err); | |
1840 | ||
1841 | sb_kill (&s); | |
1842 | ||
1843 | input_scrub_include_sb (&out, input_line_pointer); | |
1844 | sb_kill (&out); | |
1845 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1846 | } | |
1847 | ||
1848 | /* Handle the .linkonce pseudo-op. This tells the assembler to mark | |
1849 | the section to only be linked once. However, this is not supported | |
1850 | by most object file formats. This takes an optional argument, | |
1851 | which is what to do about duplicates. */ | |
1852 | ||
1853 | void | |
1854 | s_linkonce (ignore) | |
1855 | int ignore; | |
1856 | { | |
1857 | enum linkonce_type type; | |
1858 | ||
1859 | SKIP_WHITESPACE (); | |
1860 | ||
1861 | type = LINKONCE_DISCARD; | |
1862 | ||
1863 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1864 | { | |
1865 | char *s; | |
1866 | char c; | |
1867 | ||
1868 | s = input_line_pointer; | |
1869 | c = get_symbol_end (); | |
1870 | if (strcasecmp (s, "discard") == 0) | |
1871 | type = LINKONCE_DISCARD; | |
1872 | else if (strcasecmp (s, "one_only") == 0) | |
1873 | type = LINKONCE_ONE_ONLY; | |
1874 | else if (strcasecmp (s, "same_size") == 0) | |
1875 | type = LINKONCE_SAME_SIZE; | |
1876 | else if (strcasecmp (s, "same_contents") == 0) | |
1877 | type = LINKONCE_SAME_CONTENTS; | |
1878 | else | |
1879 | as_warn (_("unrecognized .linkonce type `%s'"), s); | |
1880 | ||
1881 | *input_line_pointer = c; | |
1882 | } | |
1883 | ||
1884 | #ifdef obj_handle_link_once | |
1885 | obj_handle_link_once (type); | |
1886 | #else /* ! defined (obj_handle_link_once) */ | |
1887 | #ifdef BFD_ASSEMBLER | |
1888 | { | |
1889 | flagword flags; | |
1890 | ||
1891 | if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0) | |
1892 | as_warn (_(".linkonce is not supported for this object file format")); | |
1893 | ||
1894 | flags = bfd_get_section_flags (stdoutput, now_seg); | |
1895 | flags |= SEC_LINK_ONCE; | |
1896 | switch (type) | |
1897 | { | |
1898 | default: | |
1899 | abort (); | |
1900 | case LINKONCE_DISCARD: | |
1901 | flags |= SEC_LINK_DUPLICATES_DISCARD; | |
1902 | break; | |
1903 | case LINKONCE_ONE_ONLY: | |
1904 | flags |= SEC_LINK_DUPLICATES_ONE_ONLY; | |
1905 | break; | |
1906 | case LINKONCE_SAME_SIZE: | |
1907 | flags |= SEC_LINK_DUPLICATES_SAME_SIZE; | |
1908 | break; | |
1909 | case LINKONCE_SAME_CONTENTS: | |
1910 | flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
1911 | break; | |
1912 | } | |
1913 | if (! bfd_set_section_flags (stdoutput, now_seg, flags)) | |
1914 | as_bad (_("bfd_set_section_flags: %s"), | |
1915 | bfd_errmsg (bfd_get_error ())); | |
1916 | } | |
1917 | #else /* ! defined (BFD_ASSEMBLER) */ | |
1918 | as_warn (_(".linkonce is not supported for this object file format")); | |
1919 | #endif /* ! defined (BFD_ASSEMBLER) */ | |
1920 | #endif /* ! defined (obj_handle_link_once) */ | |
1921 | ||
1922 | demand_empty_rest_of_line (); | |
1923 | } | |
1924 | ||
1925 | static void | |
1926 | s_lcomm_internal (needs_align, bytes_p) | |
1927 | /* 1 if this was a ".bss" directive, which may require a 3rd argument | |
1928 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1929 | int needs_align; | |
1930 | /* 1 if the alignment value should be interpreted as the byte boundary, | |
1931 | rather than the power of 2. */ | |
1932 | int bytes_p; | |
1933 | { | |
1934 | register char *name; | |
1935 | register char c; | |
1936 | register char *p; | |
1937 | register int temp; | |
1938 | register symbolS *symbolP; | |
1939 | segT current_seg = now_seg; | |
1940 | subsegT current_subseg = now_subseg; | |
1941 | const int max_alignment = 15; | |
1942 | int align = 0; | |
1943 | segT bss_seg = bss_section; | |
1944 | ||
1945 | name = input_line_pointer; | |
1946 | c = get_symbol_end (); | |
1947 | p = input_line_pointer; | |
1948 | *p = c; | |
1949 | SKIP_WHITESPACE (); | |
1950 | ||
1951 | /* Accept an optional comma after the name. The comma used to be | |
1952 | required, but Irix 5 cc does not generate it. */ | |
1953 | if (*input_line_pointer == ',') | |
1954 | { | |
1955 | ++input_line_pointer; | |
1956 | SKIP_WHITESPACE (); | |
1957 | } | |
1958 | ||
1959 | if (*input_line_pointer == '\n') | |
1960 | { | |
1961 | as_bad (_("Missing size expression")); | |
1962 | return; | |
1963 | } | |
1964 | ||
1965 | if ((temp = get_absolute_expression ()) < 0) | |
1966 | { | |
1967 | as_warn (_("BSS length (%d.) <0! Ignored."), temp); | |
1968 | ignore_rest_of_line (); | |
1969 | return; | |
1970 | } | |
1971 | ||
1972 | #if defined (TC_MIPS) || defined (TC_ALPHA) | |
1973 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour | |
1974 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
1975 | { | |
1976 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ | |
1977 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1978 | { | |
1979 | bss_seg = subseg_new (".sbss", 1); | |
1980 | seg_info (bss_seg)->bss = 1; | |
1981 | #ifdef BFD_ASSEMBLER | |
1982 | if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC)) | |
1983 | as_warn (_("error setting flags for \".sbss\": %s"), | |
1984 | bfd_errmsg (bfd_get_error ())); | |
1985 | #endif | |
1986 | } | |
1987 | } | |
1988 | #endif | |
1989 | if (!needs_align) | |
1990 | { | |
1991 | /* FIXME. This needs to be machine independent. */ | |
1992 | if (temp >= 8) | |
1993 | align = 3; | |
1994 | else if (temp >= 4) | |
1995 | align = 2; | |
1996 | else if (temp >= 2) | |
1997 | align = 1; | |
1998 | else | |
1999 | align = 0; | |
2000 | ||
2001 | #ifdef OBJ_EVAX | |
2002 | /* FIXME: This needs to be done in a more general fashion. */ | |
2003 | align = 3; | |
2004 | #endif | |
2005 | ||
2006 | record_alignment(bss_seg, align); | |
2007 | } | |
2008 | ||
2009 | if (needs_align) | |
2010 | { | |
2011 | align = 0; | |
2012 | SKIP_WHITESPACE (); | |
2013 | if (*input_line_pointer != ',') | |
2014 | { | |
2015 | as_bad (_("Expected comma after size")); | |
2016 | ignore_rest_of_line (); | |
2017 | return; | |
2018 | } | |
2019 | input_line_pointer++; | |
2020 | SKIP_WHITESPACE (); | |
2021 | if (*input_line_pointer == '\n') | |
2022 | { | |
2023 | as_bad (_("Missing alignment")); | |
2024 | return; | |
2025 | } | |
2026 | align = get_absolute_expression (); | |
2027 | if (bytes_p) | |
2028 | { | |
2029 | /* Convert to a power of 2. */ | |
2030 | if (align != 0) | |
2031 | { | |
2032 | unsigned int i; | |
2033 | ||
2034 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
2035 | ; | |
2036 | if (align != 1) | |
2037 | as_bad (_("Alignment not a power of 2")); | |
2038 | align = i; | |
2039 | } | |
2040 | } | |
2041 | if (align > max_alignment) | |
2042 | { | |
2043 | align = max_alignment; | |
2044 | as_warn (_("Alignment too large: %d. assumed."), align); | |
2045 | } | |
2046 | else if (align < 0) | |
2047 | { | |
2048 | align = 0; | |
2049 | as_warn (_("Alignment negative. 0 assumed.")); | |
2050 | } | |
2051 | record_alignment (bss_seg, align); | |
2052 | } /* if needs align */ | |
2053 | else | |
2054 | { | |
2055 | /* Assume some objects may require alignment on some systems. */ | |
2056 | #if defined (TC_ALPHA) && ! defined (VMS) | |
2057 | if (temp > 1) | |
2058 | { | |
2059 | align = ffs (temp) - 1; | |
2060 | if (temp % (1 << align)) | |
2061 | abort (); | |
2062 | } | |
2063 | #endif | |
2064 | } | |
2065 | ||
2066 | *p = 0; | |
2067 | symbolP = symbol_find_or_make (name); | |
2068 | *p = c; | |
2069 | ||
2070 | if ( | |
2071 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) | |
2072 | S_GET_OTHER (symbolP) == 0 && | |
2073 | S_GET_DESC (symbolP) == 0 && | |
2074 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
2075 | (S_GET_SEGMENT (symbolP) == bss_seg | |
2076 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) | |
2077 | { | |
2078 | char *pfrag; | |
2079 | ||
2080 | subseg_set (bss_seg, 1); | |
2081 | ||
2082 | if (align) | |
2083 | frag_align (align, 0, 0); | |
2084 | /* detach from old frag */ | |
2085 | if (S_GET_SEGMENT (symbolP) == bss_seg) | |
2b47531b | 2086 | symbol_get_frag (symbolP)->fr_symbol = NULL; |
252b5132 | 2087 | |
2b47531b | 2088 | symbol_set_frag (symbolP, frag_now); |
252b5132 RH |
2089 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
2090 | (offsetT) temp, (char *) 0); | |
2091 | *pfrag = 0; | |
2092 | ||
2093 | S_SET_SEGMENT (symbolP, bss_seg); | |
2094 | ||
2095 | #ifdef OBJ_COFF | |
2096 | /* The symbol may already have been created with a preceding | |
2097 | ".globl" directive -- be careful not to step on storage class | |
2098 | in that case. Otherwise, set it to static. */ | |
2099 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) | |
2100 | { | |
2101 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
2102 | } | |
2103 | #endif /* OBJ_COFF */ | |
2104 | ||
2105 | #ifdef S_SET_SIZE | |
2106 | S_SET_SIZE (symbolP, temp); | |
2107 | #endif | |
2108 | } | |
2109 | else | |
2110 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
2111 | S_GET_NAME (symbolP)); | |
2112 | ||
2113 | subseg_set (current_seg, current_subseg); | |
2114 | ||
2115 | demand_empty_rest_of_line (); | |
2116 | } /* s_lcomm_internal() */ | |
2117 | ||
2118 | void | |
2119 | s_lcomm (needs_align) | |
2120 | int needs_align; | |
2121 | { | |
2122 | s_lcomm_internal (needs_align, 0); | |
2123 | } | |
2124 | ||
2125 | void s_lcomm_bytes (needs_align) | |
2126 | int needs_align; | |
2127 | { | |
2128 | s_lcomm_internal (needs_align, 1); | |
2129 | } | |
2130 | ||
2131 | void | |
2132 | s_lsym (ignore) | |
2133 | int ignore; | |
2134 | { | |
2135 | register char *name; | |
2136 | register char c; | |
2137 | register char *p; | |
2138 | expressionS exp; | |
2139 | register symbolS *symbolP; | |
2140 | ||
2141 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
2142 | name = input_line_pointer; | |
2143 | c = get_symbol_end (); | |
2144 | p = input_line_pointer; | |
2145 | *p = c; | |
2146 | SKIP_WHITESPACE (); | |
2147 | if (*input_line_pointer != ',') | |
2148 | { | |
2149 | *p = 0; | |
2150 | as_bad (_("Expected comma after name \"%s\""), name); | |
2151 | *p = c; | |
2152 | ignore_rest_of_line (); | |
2153 | return; | |
2154 | } | |
2155 | input_line_pointer++; | |
2156 | expression (&exp); | |
2157 | if (exp.X_op != O_constant | |
2158 | && exp.X_op != O_register) | |
2159 | { | |
2160 | as_bad (_("bad expression")); | |
2161 | ignore_rest_of_line (); | |
2162 | return; | |
2163 | } | |
2164 | *p = 0; | |
2165 | symbolP = symbol_find_or_make (name); | |
2166 | ||
2167 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && | |
2168 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
2169 | those fields, and I can't see when they'd ever be tripped. I | |
2170 | don't think I understand why they were here so I may have | |
2171 | introduced a bug. As recently as 1.37 didn't have this test | |
2172 | anyway. xoxorich. */ | |
2173 | ||
2174 | if (S_GET_SEGMENT (symbolP) == undefined_section | |
2175 | && S_GET_VALUE (symbolP) == 0) | |
2176 | { | |
2177 | /* The name might be an undefined .global symbol; be sure to | |
2178 | keep the "external" bit. */ | |
2179 | S_SET_SEGMENT (symbolP, | |
2180 | (exp.X_op == O_constant | |
2181 | ? absolute_section | |
2182 | : reg_section)); | |
2183 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
2184 | } | |
2185 | else | |
2186 | { | |
2187 | as_bad (_("Symbol %s already defined"), name); | |
2188 | } | |
2189 | *p = c; | |
2190 | demand_empty_rest_of_line (); | |
2191 | } /* s_lsym() */ | |
2192 | ||
2193 | /* Read a line into an sb. */ | |
2194 | ||
2195 | static int | |
2196 | get_line_sb (line) | |
2197 | sb *line; | |
2198 | { | |
2199 | char quote1, quote2, inquote; | |
2200 | ||
2201 | if (input_line_pointer[-1] == '\n') | |
2202 | bump_line_counters (); | |
2203 | ||
2204 | if (input_line_pointer >= buffer_limit) | |
2205 | { | |
2206 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2207 | if (buffer_limit == 0) | |
2208 | return 0; | |
2209 | } | |
2210 | ||
2211 | /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this | |
2212 | code needs to be changed. */ | |
2213 | if (! flag_m68k_mri) | |
2214 | quote1 = '"'; | |
2215 | else | |
2216 | quote1 = '\0'; | |
2217 | ||
2218 | quote2 = '\0'; | |
2219 | if (flag_m68k_mri) | |
2220 | quote2 = '\''; | |
2221 | #ifdef LEX_IS_STRINGQUOTE | |
2222 | quote2 = '\''; | |
2223 | #endif | |
2224 | ||
2225 | inquote = '\0'; | |
2226 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
2227 | || (inquote != '\0' && *input_line_pointer != '\n')) | |
2228 | { | |
2229 | if (inquote == *input_line_pointer) | |
2230 | inquote = '\0'; | |
2231 | else if (inquote == '\0') | |
2232 | { | |
2233 | if (*input_line_pointer == quote1) | |
2234 | inquote = quote1; | |
2235 | else if (*input_line_pointer == quote2) | |
2236 | inquote = quote2; | |
2237 | } | |
2238 | sb_add_char (line, *input_line_pointer++); | |
2239 | } | |
2240 | while (input_line_pointer < buffer_limit | |
2241 | && is_end_of_line[(unsigned char) *input_line_pointer]) | |
2242 | { | |
2243 | if (input_line_pointer[-1] == '\n') | |
2244 | bump_line_counters (); | |
2245 | ++input_line_pointer; | |
2246 | } | |
2247 | return 1; | |
2248 | } | |
2249 | ||
2250 | /* Define a macro. This is an interface to macro.c, which is shared | |
2251 | between gas and gasp. */ | |
2252 | ||
2253 | void | |
2254 | s_macro (ignore) | |
2255 | int ignore; | |
2256 | { | |
2257 | char *file; | |
2258 | unsigned int line; | |
2259 | sb s; | |
2260 | sb label; | |
2261 | const char *err; | |
2262 | const char *name; | |
2263 | ||
2264 | as_where (&file, &line); | |
2265 | ||
2266 | sb_new (&s); | |
2267 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
2268 | sb_add_char (&s, *input_line_pointer++); | |
2269 | ||
2270 | sb_new (&label); | |
2271 | if (line_label != NULL) | |
2272 | sb_add_string (&label, S_GET_NAME (line_label)); | |
2273 | ||
2274 | err = define_macro (0, &s, &label, get_line_sb, &name); | |
2275 | if (err != NULL) | |
2276 | as_bad_where (file, line, "%s", err); | |
2277 | else | |
2278 | { | |
2279 | if (line_label != NULL) | |
2280 | { | |
2281 | S_SET_SEGMENT (line_label, undefined_section); | |
2282 | S_SET_VALUE (line_label, 0); | |
2b47531b | 2283 | symbol_set_frag (line_label, &zero_address_frag); |
252b5132 RH |
2284 | } |
2285 | ||
2286 | if (((flag_m68k_mri | |
2287 | #ifdef NO_PSEUDO_DOT | |
2288 | || 1 | |
2289 | #endif | |
2290 | ) | |
2291 | && hash_find (po_hash, name) != NULL) | |
2292 | || (! flag_m68k_mri | |
2293 | && *name == '.' | |
2294 | && hash_find (po_hash, name + 1) != NULL)) | |
2295 | as_warn (_("attempt to redefine pseudo-op `%s' ignored"), | |
2296 | name); | |
2297 | } | |
2298 | ||
2299 | sb_kill (&s); | |
2300 | } | |
2301 | ||
2302 | /* Handle the .mexit pseudo-op, which immediately exits a macro | |
2303 | expansion. */ | |
2304 | ||
2305 | void | |
2306 | s_mexit (ignore) | |
2307 | int ignore; | |
2308 | { | |
2309 | cond_exit_macro (macro_nest); | |
2310 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2311 | } | |
2312 | ||
2313 | /* Switch in and out of MRI mode. */ | |
2314 | ||
2315 | void | |
2316 | s_mri (ignore) | |
2317 | int ignore; | |
2318 | { | |
2319 | int on, old_flag; | |
2320 | ||
2321 | on = get_absolute_expression (); | |
2322 | old_flag = flag_mri; | |
2323 | if (on != 0) | |
2324 | { | |
2325 | flag_mri = 1; | |
2326 | #ifdef TC_M68K | |
2327 | flag_m68k_mri = 1; | |
2328 | #endif | |
2329 | macro_mri_mode (1); | |
2330 | } | |
2331 | else | |
2332 | { | |
2333 | flag_mri = 0; | |
2334 | flag_m68k_mri = 0; | |
2335 | macro_mri_mode (0); | |
2336 | } | |
2337 | ||
2338 | /* Operator precedence changes in m68k MRI mode, so we need to | |
2339 | update the operator rankings. */ | |
2340 | expr_set_precedence (); | |
2341 | ||
2342 | #ifdef MRI_MODE_CHANGE | |
2343 | if (on != old_flag) | |
2344 | MRI_MODE_CHANGE (on); | |
2345 | #endif | |
2346 | ||
2347 | demand_empty_rest_of_line (); | |
2348 | } | |
2349 | ||
2350 | /* Handle changing the location counter. */ | |
2351 | ||
2352 | static void | |
2353 | do_org (segment, exp, fill) | |
2354 | segT segment; | |
2355 | expressionS *exp; | |
2356 | int fill; | |
2357 | { | |
2358 | if (segment != now_seg && segment != absolute_section) | |
2359 | as_bad (_("invalid segment \"%s\"; segment \"%s\" assumed"), | |
2360 | segment_name (segment), segment_name (now_seg)); | |
2361 | ||
2362 | if (now_seg == absolute_section) | |
2363 | { | |
2364 | if (fill != 0) | |
2365 | as_warn (_("ignoring fill value in absolute section")); | |
2366 | if (exp->X_op != O_constant) | |
2367 | { | |
2368 | as_bad (_("only constant offsets supported in absolute section")); | |
2369 | exp->X_add_number = 0; | |
2370 | } | |
2371 | abs_section_offset = exp->X_add_number; | |
2372 | } | |
2373 | else | |
2374 | { | |
2375 | char *p; | |
2376 | ||
2377 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, | |
2378 | exp->X_add_number, (char *) NULL); | |
2379 | *p = fill; | |
2380 | } | |
2381 | } | |
2382 | ||
2383 | void | |
2384 | s_org (ignore) | |
2385 | int ignore; | |
2386 | { | |
2387 | register segT segment; | |
2388 | expressionS exp; | |
2389 | register long temp_fill; | |
2390 | ||
2391 | #ifdef md_flush_pending_output | |
2392 | md_flush_pending_output (); | |
2393 | #endif | |
2394 | ||
2395 | /* The m68k MRI assembler has a different meaning for .org. It | |
2396 | means to create an absolute section at a given address. We can't | |
2397 | support that--use a linker script instead. */ | |
2398 | if (flag_m68k_mri) | |
2399 | { | |
2400 | as_bad (_("MRI style ORG pseudo-op not supported")); | |
2401 | ignore_rest_of_line (); | |
2402 | return; | |
2403 | } | |
2404 | ||
2405 | /* Don't believe the documentation of BSD 4.2 AS. There is no such | |
2406 | thing as a sub-segment-relative origin. Any absolute origin is | |
2407 | given a warning, then assumed to be segment-relative. Any | |
2408 | segmented origin expression ("foo+42") had better be in the right | |
2409 | segment or the .org is ignored. | |
2410 | ||
2411 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
2412 | we never know sub-segment sizes when we are reading code. BSD | |
2413 | will crash trying to emit negative numbers of filler bytes in | |
2414 | certain .orgs. We don't crash, but see as-write for that code. | |
2415 | ||
2416 | Don't make frag if need_pass_2==1. */ | |
2417 | segment = get_known_segmented_expression (&exp); | |
2418 | if (*input_line_pointer == ',') | |
2419 | { | |
2420 | input_line_pointer++; | |
2421 | temp_fill = get_absolute_expression (); | |
2422 | } | |
2423 | else | |
2424 | temp_fill = 0; | |
2425 | ||
2426 | if (!need_pass_2) | |
2427 | do_org (segment, &exp, temp_fill); | |
2428 | ||
2429 | demand_empty_rest_of_line (); | |
2430 | } /* s_org() */ | |
2431 | ||
2432 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be | |
2433 | called by the obj-format routine which handles section changing | |
2434 | when in MRI mode. It will create a new section, and return it. It | |
2435 | will set *TYPE to the section type: one of 'C' (code), 'D' (data), | |
2436 | 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the | |
2437 | flags will be set in the section. */ | |
2438 | ||
2439 | void | |
2440 | s_mri_sect (type) | |
2441 | char *type; | |
2442 | { | |
2443 | #ifdef TC_M68K | |
2444 | ||
2445 | char *name; | |
2446 | char c; | |
2447 | segT seg; | |
2448 | ||
2449 | SKIP_WHITESPACE (); | |
2450 | ||
2451 | name = input_line_pointer; | |
2452 | if (! isdigit ((unsigned char) *name)) | |
2453 | c = get_symbol_end (); | |
2454 | else | |
2455 | { | |
2456 | do | |
2457 | { | |
2458 | ++input_line_pointer; | |
2459 | } | |
2460 | while (isdigit ((unsigned char) *input_line_pointer)); | |
2461 | c = *input_line_pointer; | |
2462 | *input_line_pointer = '\0'; | |
2463 | } | |
2464 | ||
2465 | name = xstrdup (name); | |
2466 | ||
2467 | *input_line_pointer = c; | |
2468 | ||
2469 | seg = subseg_new (name, 0); | |
2470 | ||
2471 | if (*input_line_pointer == ',') | |
2472 | { | |
2473 | int align; | |
2474 | ||
2475 | ++input_line_pointer; | |
2476 | align = get_absolute_expression (); | |
2477 | record_alignment (seg, align); | |
2478 | } | |
2479 | ||
2480 | *type = 'C'; | |
2481 | if (*input_line_pointer == ',') | |
2482 | { | |
2483 | c = *++input_line_pointer; | |
2484 | c = toupper ((unsigned char) c); | |
2485 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') | |
2486 | *type = c; | |
2487 | else | |
2488 | as_bad (_("unrecognized section type")); | |
2489 | ++input_line_pointer; | |
2490 | ||
2491 | #ifdef BFD_ASSEMBLER | |
2492 | { | |
2493 | flagword flags; | |
2494 | ||
2495 | flags = SEC_NO_FLAGS; | |
2496 | if (*type == 'C') | |
2497 | flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE; | |
2498 | else if (*type == 'D' || *type == 'M') | |
2499 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA; | |
2500 | else if (*type == 'R') | |
2501 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM; | |
2502 | if (flags != SEC_NO_FLAGS) | |
2503 | { | |
2504 | if (! bfd_set_section_flags (stdoutput, seg, flags)) | |
2505 | as_warn (_("error setting flags for \"%s\": %s"), | |
2506 | bfd_section_name (stdoutput, seg), | |
2507 | bfd_errmsg (bfd_get_error ())); | |
2508 | } | |
2509 | } | |
2510 | #endif | |
2511 | } | |
2512 | ||
2513 | /* Ignore the HP type. */ | |
2514 | if (*input_line_pointer == ',') | |
2515 | input_line_pointer += 2; | |
2516 | ||
2517 | demand_empty_rest_of_line (); | |
2518 | ||
2519 | #else /* ! TC_M68K */ | |
2520 | #ifdef TC_I960 | |
2521 | ||
2522 | char *name; | |
2523 | char c; | |
2524 | segT seg; | |
2525 | ||
2526 | SKIP_WHITESPACE (); | |
2527 | ||
2528 | name = input_line_pointer; | |
2529 | c = get_symbol_end (); | |
2530 | ||
2531 | name = xstrdup (name); | |
2532 | ||
2533 | *input_line_pointer = c; | |
2534 | ||
2535 | seg = subseg_new (name, 0); | |
2536 | ||
2537 | if (*input_line_pointer != ',') | |
2538 | *type = 'C'; | |
2539 | else | |
2540 | { | |
2541 | char *sectype; | |
2542 | ||
2543 | ++input_line_pointer; | |
2544 | SKIP_WHITESPACE (); | |
2545 | sectype = input_line_pointer; | |
2546 | c = get_symbol_end (); | |
2547 | if (*sectype == '\0') | |
2548 | *type = 'C'; | |
2549 | else if (strcasecmp (sectype, "text") == 0) | |
2550 | *type = 'C'; | |
2551 | else if (strcasecmp (sectype, "data") == 0) | |
2552 | *type = 'D'; | |
2553 | else if (strcasecmp (sectype, "romdata") == 0) | |
2554 | *type = 'R'; | |
2555 | else | |
2556 | as_warn (_("unrecognized section type `%s'"), sectype); | |
2557 | *input_line_pointer = c; | |
2558 | } | |
2559 | ||
2560 | if (*input_line_pointer == ',') | |
2561 | { | |
2562 | char *seccmd; | |
2563 | ||
2564 | ++input_line_pointer; | |
2565 | SKIP_WHITESPACE (); | |
2566 | seccmd = input_line_pointer; | |
2567 | c = get_symbol_end (); | |
2568 | if (strcasecmp (seccmd, "absolute") == 0) | |
2569 | { | |
2570 | as_bad (_("absolute sections are not supported")); | |
2571 | *input_line_pointer = c; | |
2572 | ignore_rest_of_line (); | |
2573 | return; | |
2574 | } | |
2575 | else if (strcasecmp (seccmd, "align") == 0) | |
2576 | { | |
2577 | int align; | |
2578 | ||
2579 | *input_line_pointer = c; | |
2580 | align = get_absolute_expression (); | |
2581 | record_alignment (seg, align); | |
2582 | } | |
2583 | else | |
2584 | { | |
2585 | as_warn (_("unrecognized section command `%s'"), seccmd); | |
2586 | *input_line_pointer = c; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | demand_empty_rest_of_line (); | |
2591 | ||
2592 | #else /* ! TC_I960 */ | |
2593 | /* The MRI assembler seems to use different forms of .sect for | |
2594 | different targets. */ | |
2595 | as_bad ("MRI mode not supported for this target"); | |
2596 | ignore_rest_of_line (); | |
2597 | #endif /* ! TC_I960 */ | |
2598 | #endif /* ! TC_M68K */ | |
2599 | } | |
2600 | ||
2601 | /* Handle the .print pseudo-op. */ | |
2602 | ||
2603 | void | |
2604 | s_print (ignore) | |
2605 | int ignore; | |
2606 | { | |
2607 | char *s; | |
2608 | int len; | |
2609 | ||
2610 | s = demand_copy_C_string (&len); | |
2611 | printf ("%s\n", s); | |
2612 | demand_empty_rest_of_line (); | |
2613 | } | |
2614 | ||
2615 | /* Handle the .purgem pseudo-op. */ | |
2616 | ||
2617 | void | |
2618 | s_purgem (ignore) | |
2619 | int ignore; | |
2620 | { | |
2621 | if (is_it_end_of_statement ()) | |
2622 | { | |
2623 | demand_empty_rest_of_line (); | |
2624 | return; | |
2625 | } | |
2626 | ||
2627 | do | |
2628 | { | |
2629 | char *name; | |
2630 | char c; | |
2631 | ||
2632 | SKIP_WHITESPACE (); | |
2633 | name = input_line_pointer; | |
2634 | c = get_symbol_end (); | |
2635 | delete_macro (name); | |
2636 | *input_line_pointer = c; | |
2637 | SKIP_WHITESPACE (); | |
2638 | } | |
2639 | while (*input_line_pointer++ == ','); | |
2640 | ||
2641 | --input_line_pointer; | |
2642 | demand_empty_rest_of_line (); | |
2643 | } | |
2644 | ||
2645 | /* Handle the .rept pseudo-op. */ | |
2646 | ||
2647 | void | |
2648 | s_rept (ignore) | |
2649 | int ignore; | |
2650 | { | |
2651 | int count; | |
2652 | sb one; | |
2653 | sb many; | |
2654 | ||
2655 | count = get_absolute_expression (); | |
2656 | ||
2657 | sb_new (&one); | |
2658 | if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb)) | |
2659 | { | |
2660 | as_bad (_("rept without endr")); | |
2661 | return; | |
2662 | } | |
2663 | ||
2664 | sb_new (&many); | |
2665 | while (count-- > 0) | |
2666 | sb_add_sb (&many, &one); | |
2667 | ||
2668 | sb_kill (&one); | |
2669 | ||
2670 | input_scrub_include_sb (&many, input_line_pointer); | |
2671 | sb_kill (&many); | |
2672 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2673 | } | |
2674 | ||
2675 | /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then | |
2676 | this is .equiv, and it is an error if the symbol is already | |
2677 | defined. */ | |
2678 | ||
2679 | void | |
2680 | s_set (equiv) | |
2681 | int equiv; | |
2682 | { | |
2683 | register char *name; | |
2684 | register char delim; | |
2685 | register char *end_name; | |
2686 | register symbolS *symbolP; | |
2687 | ||
2688 | /* | |
2689 | * Especial apologies for the random logic: | |
2690 | * this just grew, and could be parsed much more simply! | |
2691 | * Dean in haste. | |
2692 | */ | |
2693 | name = input_line_pointer; | |
2694 | delim = get_symbol_end (); | |
2695 | end_name = input_line_pointer; | |
2696 | *end_name = delim; | |
2697 | SKIP_WHITESPACE (); | |
2698 | ||
2699 | if (*input_line_pointer != ',') | |
2700 | { | |
2701 | *end_name = 0; | |
2702 | as_bad (_("Expected comma after name \"%s\""), name); | |
2703 | *end_name = delim; | |
2704 | ignore_rest_of_line (); | |
2705 | return; | |
2706 | } | |
2707 | ||
2708 | input_line_pointer++; | |
2709 | *end_name = 0; | |
2710 | ||
2711 | if (name[0] == '.' && name[1] == '\0') | |
2712 | { | |
2713 | /* Turn '. = mumble' into a .org mumble */ | |
2714 | register segT segment; | |
2715 | expressionS exp; | |
2716 | ||
2717 | segment = get_known_segmented_expression (&exp); | |
2718 | ||
2719 | if (!need_pass_2) | |
2720 | do_org (segment, &exp, 0); | |
2721 | ||
2722 | *end_name = delim; | |
2723 | return; | |
2724 | } | |
2725 | ||
2726 | if ((symbolP = symbol_find (name)) == NULL | |
2727 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
2728 | { | |
2729 | #ifndef NO_LISTING | |
2730 | /* When doing symbol listings, play games with dummy fragments living | |
2731 | outside the normal fragment chain to record the file and line info | |
2732 | for this symbol. */ | |
2733 | if (listing & LISTING_SYMBOLS) | |
2734 | { | |
2735 | extern struct list_info_struct *listing_tail; | |
2736 | fragS *dummy_frag = (fragS *) xmalloc (sizeof(fragS)); | |
2737 | memset (dummy_frag, 0, sizeof(fragS)); | |
2738 | dummy_frag->fr_type = rs_fill; | |
2739 | dummy_frag->line = listing_tail; | |
2740 | symbolP = symbol_new (name, undefined_section, 0, dummy_frag); | |
2741 | dummy_frag->fr_symbol = symbolP; | |
2742 | } | |
2743 | else | |
2744 | #endif | |
2745 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); | |
2746 | ||
2747 | #ifdef OBJ_COFF | |
2748 | /* "set" symbols are local unless otherwise specified. */ | |
2749 | SF_SET_LOCAL (symbolP); | |
2750 | #endif /* OBJ_COFF */ | |
2751 | ||
2752 | } /* make a new symbol */ | |
2753 | ||
2754 | symbol_table_insert (symbolP); | |
2755 | ||
2756 | *end_name = delim; | |
2757 | ||
2758 | if (equiv | |
2759 | && S_IS_DEFINED (symbolP) | |
2760 | && S_GET_SEGMENT (symbolP) != reg_section) | |
2761 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
2762 | ||
2763 | pseudo_set (symbolP); | |
2764 | demand_empty_rest_of_line (); | |
2765 | } /* s_set() */ | |
2766 | ||
2767 | void | |
2768 | s_space (mult) | |
2769 | int mult; | |
2770 | { | |
2771 | expressionS exp; | |
2772 | expressionS val; | |
2773 | char *p = 0; | |
2774 | char *stop = NULL; | |
2775 | char stopc; | |
2776 | int bytes; | |
2777 | ||
2778 | #ifdef md_flush_pending_output | |
2779 | md_flush_pending_output (); | |
2780 | #endif | |
2781 | ||
2782 | if (flag_mri) | |
2783 | stop = mri_comment_field (&stopc); | |
2784 | ||
2785 | /* In m68k MRI mode, we need to align to a word boundary, unless | |
2786 | this is ds.b. */ | |
2787 | if (flag_m68k_mri && mult > 1) | |
2788 | { | |
2789 | if (now_seg == absolute_section) | |
2790 | { | |
2791 | abs_section_offset += abs_section_offset & 1; | |
2792 | if (line_label != NULL) | |
2793 | S_SET_VALUE (line_label, abs_section_offset); | |
2794 | } | |
2795 | else if (mri_common_symbol != NULL) | |
2796 | { | |
2797 | valueT val; | |
2798 | ||
2799 | val = S_GET_VALUE (mri_common_symbol); | |
2800 | if ((val & 1) != 0) | |
2801 | { | |
2802 | S_SET_VALUE (mri_common_symbol, val + 1); | |
2803 | if (line_label != NULL) | |
2804 | { | |
2b47531b ILT |
2805 | expressionS *symexp; |
2806 | ||
2807 | symexp = symbol_get_value_expression (line_label); | |
2808 | know (symexp->X_op == O_symbol); | |
2809 | know (symexp->X_add_symbol == mri_common_symbol); | |
2810 | symexp->X_add_number += 1; | |
252b5132 RH |
2811 | } |
2812 | } | |
2813 | } | |
2814 | else | |
2815 | { | |
2816 | do_align (1, (char *) NULL, 0, 0); | |
2817 | if (line_label != NULL) | |
2818 | { | |
2b47531b | 2819 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
2820 | S_SET_VALUE (line_label, frag_now_fix ()); |
2821 | } | |
2822 | } | |
2823 | } | |
2824 | ||
2825 | bytes = mult; | |
2826 | ||
2827 | expression (&exp); | |
2828 | ||
2829 | SKIP_WHITESPACE (); | |
2830 | if (*input_line_pointer == ',') | |
2831 | { | |
2832 | ++input_line_pointer; | |
2833 | expression (&val); | |
2834 | } | |
2835 | else | |
2836 | { | |
2837 | val.X_op = O_constant; | |
2838 | val.X_add_number = 0; | |
2839 | } | |
2840 | ||
2841 | if (val.X_op != O_constant | |
2842 | || val.X_add_number < - 0x80 | |
2843 | || val.X_add_number > 0xff | |
2844 | || (mult != 0 && mult != 1 && val.X_add_number != 0)) | |
2845 | { | |
2846 | if (exp.X_op != O_constant) | |
2847 | as_bad (_("Unsupported variable size or fill value")); | |
2848 | else | |
2849 | { | |
2850 | offsetT i; | |
2851 | ||
2852 | if (mult == 0) | |
2853 | mult = 1; | |
2854 | bytes = mult * exp.X_add_number; | |
2855 | for (i = 0; i < exp.X_add_number; i++) | |
2856 | emit_expr (&val, mult); | |
2857 | } | |
2858 | } | |
2859 | else | |
2860 | { | |
2861 | if (exp.X_op == O_constant) | |
2862 | { | |
2863 | long repeat; | |
2864 | ||
2865 | repeat = exp.X_add_number; | |
2866 | if (mult) | |
2867 | repeat *= mult; | |
2868 | bytes = repeat; | |
2869 | if (repeat <= 0) | |
2870 | { | |
2871 | if (! flag_mri) | |
2872 | as_warn (_(".space repeat count is zero, ignored")); | |
2873 | else if (repeat < 0) | |
2874 | as_warn (_(".space repeat count is negative, ignored")); | |
2875 | goto getout; | |
2876 | } | |
2877 | ||
2878 | /* If we are in the absolute section, just bump the offset. */ | |
2879 | if (now_seg == absolute_section) | |
2880 | { | |
2881 | abs_section_offset += repeat; | |
2882 | goto getout; | |
2883 | } | |
2884 | ||
2885 | /* If we are secretly in an MRI common section, then | |
2886 | creating space just increases the size of the common | |
2887 | symbol. */ | |
2888 | if (mri_common_symbol != NULL) | |
2889 | { | |
2890 | S_SET_VALUE (mri_common_symbol, | |
2891 | S_GET_VALUE (mri_common_symbol) + repeat); | |
2892 | goto getout; | |
2893 | } | |
2894 | ||
2895 | if (!need_pass_2) | |
2896 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
2897 | (offsetT) repeat, (char *) 0); | |
2898 | } | |
2899 | else | |
2900 | { | |
2901 | if (now_seg == absolute_section) | |
2902 | { | |
2903 | as_bad (_("space allocation too complex in absolute section")); | |
2904 | subseg_set (text_section, 0); | |
2905 | } | |
2906 | if (mri_common_symbol != NULL) | |
2907 | { | |
2908 | as_bad (_("space allocation too complex in common section")); | |
2909 | mri_common_symbol = NULL; | |
2910 | } | |
2911 | if (!need_pass_2) | |
2912 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, | |
2913 | make_expr_symbol (&exp), (offsetT) 0, (char *) 0); | |
2914 | } | |
2915 | ||
2916 | if (p) | |
2917 | *p = val.X_add_number; | |
2918 | } | |
2919 | ||
2920 | getout: | |
2921 | ||
2922 | /* In MRI mode, after an odd number of bytes, we must align to an | |
2923 | even word boundary, unless the next instruction is a dc.b, ds.b | |
2924 | or dcb.b. */ | |
2925 | if (flag_mri && (bytes & 1) != 0) | |
2926 | mri_pending_align = 1; | |
2927 | ||
2928 | demand_empty_rest_of_line (); | |
2929 | ||
2930 | if (flag_mri) | |
2931 | mri_comment_end (stop, stopc); | |
2932 | } | |
2933 | ||
2934 | /* This is like s_space, but the value is a floating point number with | |
2935 | the given precision. This is for the MRI dcb.s pseudo-op and | |
2936 | friends. */ | |
2937 | ||
2938 | void | |
2939 | s_float_space (float_type) | |
2940 | int float_type; | |
2941 | { | |
2942 | offsetT count; | |
2943 | int flen; | |
2944 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
2945 | char *stop = NULL; | |
2946 | char stopc; | |
2947 | ||
2948 | if (flag_mri) | |
2949 | stop = mri_comment_field (&stopc); | |
2950 | ||
2951 | count = get_absolute_expression (); | |
2952 | ||
2953 | SKIP_WHITESPACE (); | |
2954 | if (*input_line_pointer != ',') | |
2955 | { | |
2956 | as_bad (_("missing value")); | |
2957 | ignore_rest_of_line (); | |
2958 | if (flag_mri) | |
2959 | mri_comment_end (stop, stopc); | |
2960 | return; | |
2961 | } | |
2962 | ||
2963 | ++input_line_pointer; | |
2964 | ||
2965 | SKIP_WHITESPACE (); | |
2966 | ||
2967 | /* Skip any 0{letter} that may be present. Don't even check if the | |
2968 | * letter is legal. */ | |
2969 | if (input_line_pointer[0] == '0' | |
2970 | && isalpha ((unsigned char) input_line_pointer[1])) | |
2971 | input_line_pointer += 2; | |
2972 | ||
2973 | /* Accept :xxxx, where the x's are hex digits, for a floating point | |
2974 | with the exact digits specified. */ | |
2975 | if (input_line_pointer[0] == ':') | |
2976 | { | |
2977 | flen = hex_float (float_type, temp); | |
2978 | if (flen < 0) | |
2979 | { | |
2980 | ignore_rest_of_line (); | |
2981 | if (flag_mri) | |
2982 | mri_comment_end (stop, stopc); | |
2983 | return; | |
2984 | } | |
2985 | } | |
2986 | else | |
2987 | { | |
2988 | char *err; | |
2989 | ||
2990 | err = md_atof (float_type, temp, &flen); | |
2991 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
2992 | know (flen > 0); | |
2993 | if (err) | |
2994 | { | |
2995 | as_bad (_("Bad floating literal: %s"), err); | |
2996 | ignore_rest_of_line (); | |
2997 | if (flag_mri) | |
2998 | mri_comment_end (stop, stopc); | |
2999 | return; | |
3000 | } | |
3001 | } | |
3002 | ||
3003 | while (--count >= 0) | |
3004 | { | |
3005 | char *p; | |
3006 | ||
3007 | p = frag_more (flen); | |
3008 | memcpy (p, temp, (unsigned int) flen); | |
3009 | } | |
3010 | ||
3011 | demand_empty_rest_of_line (); | |
3012 | ||
3013 | if (flag_mri) | |
3014 | mri_comment_end (stop, stopc); | |
3015 | } | |
3016 | ||
3017 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ | |
3018 | ||
3019 | void | |
3020 | s_struct (ignore) | |
3021 | int ignore; | |
3022 | { | |
3023 | char *stop = NULL; | |
3024 | char stopc; | |
3025 | ||
3026 | if (flag_mri) | |
3027 | stop = mri_comment_field (&stopc); | |
3028 | abs_section_offset = get_absolute_expression (); | |
3029 | subseg_set (absolute_section, 0); | |
3030 | demand_empty_rest_of_line (); | |
3031 | if (flag_mri) | |
3032 | mri_comment_end (stop, stopc); | |
3033 | } | |
3034 | ||
3035 | void | |
3036 | s_text (ignore) | |
3037 | int ignore; | |
3038 | { | |
3039 | register int temp; | |
3040 | ||
3041 | temp = get_absolute_expression (); | |
3042 | subseg_set (text_section, (subsegT) temp); | |
3043 | demand_empty_rest_of_line (); | |
3044 | #ifdef OBJ_VMS | |
3045 | const_flag &= ~IN_DEFAULT_SECTION; | |
3046 | #endif | |
3047 | } /* s_text() */ | |
3048 | \f | |
3049 | ||
3050 | void | |
3051 | demand_empty_rest_of_line () | |
3052 | { | |
3053 | SKIP_WHITESPACE (); | |
3054 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
3055 | { | |
3056 | input_line_pointer++; | |
3057 | } | |
3058 | else | |
3059 | { | |
3060 | ignore_rest_of_line (); | |
3061 | } | |
3062 | /* Return having already swallowed end-of-line. */ | |
3063 | } /* Return pointing just after end-of-line. */ | |
3064 | ||
3065 | void | |
3066 | ignore_rest_of_line () /* For suspect lines: gives warning. */ | |
3067 | { | |
3068 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
3069 | { | |
3070 | if (isprint ((unsigned char) *input_line_pointer)) | |
3071 | as_bad (_("Rest of line ignored. First ignored character is `%c'."), | |
3072 | *input_line_pointer); | |
3073 | else | |
3074 | as_bad (_("Rest of line ignored. First ignored character valued 0x%x."), | |
3075 | *input_line_pointer); | |
3076 | while (input_line_pointer < buffer_limit | |
3077 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3078 | { | |
3079 | input_line_pointer++; | |
3080 | } | |
3081 | } | |
3082 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3083 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3084 | } | |
3085 | ||
3086 | void | |
3087 | discard_rest_of_line () | |
3088 | { | |
3089 | while (input_line_pointer < buffer_limit | |
3090 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3091 | { | |
3092 | input_line_pointer++; | |
3093 | } | |
3094 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3095 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3096 | } | |
3097 | ||
3098 | /* | |
3099 | * pseudo_set() | |
3100 | * | |
3101 | * In: Pointer to a symbol. | |
3102 | * Input_line_pointer->expression. | |
3103 | * | |
3104 | * Out: Input_line_pointer->just after any whitespace after expression. | |
3105 | * Tried to set symbol to value of expression. | |
3106 | * Will change symbols type, value, and frag; | |
3107 | */ | |
3108 | void | |
3109 | pseudo_set (symbolP) | |
3110 | symbolS *symbolP; | |
3111 | { | |
3112 | expressionS exp; | |
3113 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3114 | int ext; | |
3115 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3116 | ||
3117 | know (symbolP); /* NULL pointer is logic error. */ | |
3118 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3119 | ext = S_IS_EXTERNAL (symbolP); | |
3120 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3121 | ||
3122 | (void) expression (&exp); | |
3123 | ||
3124 | if (exp.X_op == O_illegal) | |
3125 | as_bad (_("illegal expression; zero assumed")); | |
3126 | else if (exp.X_op == O_absent) | |
3127 | as_bad (_("missing expression; zero assumed")); | |
3128 | else if (exp.X_op == O_big) | |
3129 | { | |
3130 | if (exp.X_add_number > 0) | |
3131 | as_bad (_("bignum invalid; zero assumed")); | |
3132 | else | |
3133 | as_bad (_("floating point number invalid; zero assumed")); | |
3134 | } | |
3135 | else if (exp.X_op == O_subtract | |
3136 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
3137 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
3138 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
2b47531b ILT |
3139 | && (symbol_get_frag (exp.X_add_symbol) |
3140 | == symbol_get_frag (exp.X_op_symbol))) | |
252b5132 RH |
3141 | { |
3142 | exp.X_op = O_constant; | |
3143 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
3144 | - S_GET_VALUE (exp.X_op_symbol)); | |
3145 | } | |
3146 | ||
3147 | switch (exp.X_op) | |
3148 | { | |
3149 | case O_illegal: | |
3150 | case O_absent: | |
3151 | case O_big: | |
3152 | exp.X_add_number = 0; | |
3153 | /* Fall through. */ | |
3154 | case O_constant: | |
3155 | S_SET_SEGMENT (symbolP, absolute_section); | |
3156 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3157 | if (ext) | |
3158 | S_SET_EXTERNAL (symbolP); | |
3159 | else | |
3160 | S_CLEAR_EXTERNAL (symbolP); | |
3161 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3162 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
3163 | if (exp.X_op != O_constant) | |
2b47531b | 3164 | symbol_set_frag (symbolP, &zero_address_frag); |
252b5132 RH |
3165 | break; |
3166 | ||
3167 | case O_register: | |
3168 | S_SET_SEGMENT (symbolP, reg_section); | |
3169 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
2b47531b | 3170 | symbol_set_frag (symbolP, &zero_address_frag); |
252b5132 RH |
3171 | break; |
3172 | ||
3173 | case O_symbol: | |
3174 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section | |
3175 | || exp.X_add_number != 0) | |
2b47531b | 3176 | symbol_set_value_expression (symbolP, &exp); |
252b5132 RH |
3177 | else |
3178 | { | |
3179 | symbolS *s = exp.X_add_symbol; | |
3180 | ||
3181 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); | |
3182 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3183 | if (ext) | |
3184 | S_SET_EXTERNAL (symbolP); | |
3185 | else | |
3186 | S_CLEAR_EXTERNAL (symbolP); | |
3187 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3188 | S_SET_VALUE (symbolP, | |
3189 | exp.X_add_number + S_GET_VALUE (s)); | |
2b47531b | 3190 | symbol_set_frag (symbolP, symbol_get_frag (s)); |
252b5132 RH |
3191 | copy_symbol_attributes (symbolP, s); |
3192 | } | |
3193 | break; | |
3194 | ||
3195 | default: | |
3196 | /* The value is some complex expression. | |
3197 | FIXME: Should we set the segment to anything? */ | |
2b47531b | 3198 | symbol_set_value_expression (symbolP, &exp); |
252b5132 RH |
3199 | break; |
3200 | } | |
3201 | } | |
3202 | \f | |
3203 | /* | |
3204 | * cons() | |
3205 | * | |
3206 | * CONStruct more frag of .bytes, or .words etc. | |
3207 | * Should need_pass_2 be 1 then emit no frag(s). | |
3208 | * This understands EXPRESSIONS. | |
3209 | * | |
3210 | * Bug (?) | |
3211 | * | |
3212 | * This has a split personality. We use expression() to read the | |
3213 | * value. We can detect if the value won't fit in a byte or word. | |
3214 | * But we can't detect if expression() discarded significant digits | |
3215 | * in the case of a long. Not worth the crocks required to fix it. | |
3216 | */ | |
3217 | ||
3218 | /* Select a parser for cons expressions. */ | |
3219 | ||
3220 | /* Some targets need to parse the expression in various fancy ways. | |
3221 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
3222 | (for example, the HPPA does this). Otherwise, you can define | |
3223 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
3224 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
3225 | are defined, which is the normal case, then only simple expressions | |
3226 | are permitted. */ | |
3227 | ||
3228 | static void | |
3229 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3230 | ||
3231 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3232 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3233 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
3234 | static void | |
3235 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3236 | #endif | |
3237 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3238 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
3239 | static void | |
3240 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3241 | #endif | |
3242 | ||
3243 | /* If we haven't gotten one yet, just call expression. */ | |
3244 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3245 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
3246 | #endif | |
3247 | #endif | |
3248 | ||
3249 | /* worker to do .byte etc statements */ | |
3250 | /* clobbers input_line_pointer, checks */ | |
3251 | /* end-of-line. */ | |
3252 | static void | |
3253 | cons_worker (nbytes, rva) | |
3254 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
3255 | int rva; | |
3256 | { | |
3257 | int c; | |
3258 | expressionS exp; | |
3259 | char *stop = NULL; | |
3260 | char stopc; | |
3261 | ||
3262 | #ifdef md_flush_pending_output | |
3263 | md_flush_pending_output (); | |
3264 | #endif | |
3265 | ||
3266 | if (flag_mri) | |
3267 | stop = mri_comment_field (&stopc); | |
3268 | ||
3269 | if (is_it_end_of_statement ()) | |
3270 | { | |
3271 | demand_empty_rest_of_line (); | |
3272 | if (flag_mri) | |
3273 | mri_comment_end (stop, stopc); | |
3274 | return; | |
3275 | } | |
3276 | ||
3277 | #ifdef md_cons_align | |
3278 | md_cons_align (nbytes); | |
3279 | #endif | |
3280 | ||
3281 | c = 0; | |
3282 | do | |
3283 | { | |
3284 | if (flag_m68k_mri) | |
3285 | parse_mri_cons (&exp, (unsigned int) nbytes); | |
3286 | else | |
3287 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); | |
3288 | ||
3289 | if (rva) | |
3290 | { | |
3291 | if (exp.X_op == O_symbol) | |
3292 | exp.X_op = O_symbol_rva; | |
3293 | else | |
3294 | as_fatal (_("rva without symbol")); | |
3295 | } | |
3296 | emit_expr (&exp, (unsigned int) nbytes); | |
3297 | ++c; | |
3298 | } | |
3299 | while (*input_line_pointer++ == ','); | |
3300 | ||
3301 | /* In MRI mode, after an odd number of bytes, we must align to an | |
3302 | even word boundary, unless the next instruction is a dc.b, ds.b | |
3303 | or dcb.b. */ | |
3304 | if (flag_mri && nbytes == 1 && (c & 1) != 0) | |
3305 | mri_pending_align = 1; | |
3306 | ||
3307 | input_line_pointer--; /* Put terminator back into stream. */ | |
3308 | ||
3309 | demand_empty_rest_of_line (); | |
3310 | ||
3311 | if (flag_mri) | |
3312 | mri_comment_end (stop, stopc); | |
3313 | } | |
3314 | ||
3315 | ||
3316 | void | |
3317 | cons (size) | |
3318 | int size; | |
3319 | { | |
3320 | cons_worker (size, 0); | |
3321 | } | |
3322 | ||
3323 | void | |
3324 | s_rva (size) | |
3325 | int size; | |
3326 | { | |
3327 | cons_worker (size, 1); | |
3328 | } | |
3329 | ||
3330 | /* Put the contents of expression EXP into the object file using | |
3331 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
3332 | ||
3333 | void | |
3334 | emit_expr (exp, nbytes) | |
3335 | expressionS *exp; | |
3336 | unsigned int nbytes; | |
3337 | { | |
3338 | operatorT op; | |
3339 | register char *p; | |
3340 | valueT extra_digit = 0; | |
3341 | ||
3342 | /* Don't do anything if we are going to make another pass. */ | |
3343 | if (need_pass_2) | |
3344 | return; | |
3345 | ||
3346 | #ifndef NO_LISTING | |
3347 | #ifdef OBJ_ELF | |
3348 | /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will | |
3349 | appear as a four byte positive constant in the .line section, | |
3350 | followed by a 2 byte 0xffff. Look for that case here. */ | |
3351 | { | |
3352 | static int dwarf_line = -1; | |
3353 | ||
3354 | if (strcmp (segment_name (now_seg), ".line") != 0) | |
3355 | dwarf_line = -1; | |
3356 | else if (dwarf_line >= 0 | |
3357 | && nbytes == 2 | |
3358 | && exp->X_op == O_constant | |
3359 | && (exp->X_add_number == -1 || exp->X_add_number == 0xffff)) | |
3360 | listing_source_line ((unsigned int) dwarf_line); | |
3361 | else if (nbytes == 4 | |
3362 | && exp->X_op == O_constant | |
3363 | && exp->X_add_number >= 0) | |
3364 | dwarf_line = exp->X_add_number; | |
3365 | else | |
3366 | dwarf_line = -1; | |
3367 | } | |
3368 | ||
3369 | /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will | |
3370 | appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte | |
3371 | AT_sibling (0x12) followed by a four byte address of the sibling | |
3372 | followed by a 2 byte AT_name (0x38) followed by the name of the | |
3373 | file. We look for that case here. */ | |
3374 | { | |
3375 | static int dwarf_file = 0; | |
3376 | ||
3377 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
3378 | dwarf_file = 0; | |
3379 | else if (dwarf_file == 0 | |
3380 | && nbytes == 2 | |
3381 | && exp->X_op == O_constant | |
3382 | && exp->X_add_number == 0x11) | |
3383 | dwarf_file = 1; | |
3384 | else if (dwarf_file == 1 | |
3385 | && nbytes == 2 | |
3386 | && exp->X_op == O_constant | |
3387 | && exp->X_add_number == 0x12) | |
3388 | dwarf_file = 2; | |
3389 | else if (dwarf_file == 2 | |
3390 | && nbytes == 4) | |
3391 | dwarf_file = 3; | |
3392 | else if (dwarf_file == 3 | |
3393 | && nbytes == 2 | |
3394 | && exp->X_op == O_constant | |
3395 | && exp->X_add_number == 0x38) | |
3396 | dwarf_file = 4; | |
3397 | else | |
3398 | dwarf_file = 0; | |
3399 | ||
3400 | /* The variable dwarf_file_string tells stringer that the string | |
3401 | may be the name of the source file. */ | |
3402 | if (dwarf_file == 4) | |
3403 | dwarf_file_string = 1; | |
3404 | else | |
3405 | dwarf_file_string = 0; | |
3406 | } | |
3407 | #endif | |
3408 | #endif | |
3409 | ||
3410 | if (check_eh_frame (exp, &nbytes)) | |
3411 | return; | |
3412 | ||
3413 | op = exp->X_op; | |
3414 | ||
3415 | /* Allow `.word 0' in the absolute section. */ | |
3416 | if (now_seg == absolute_section) | |
3417 | { | |
3418 | if (op != O_constant || exp->X_add_number != 0) | |
3419 | as_bad (_("attempt to store value in absolute section")); | |
3420 | abs_section_offset += nbytes; | |
3421 | return; | |
3422 | } | |
3423 | ||
3424 | /* Handle a negative bignum. */ | |
3425 | if (op == O_uminus | |
3426 | && exp->X_add_number == 0 | |
2b47531b ILT |
3427 | && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big |
3428 | && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0) | |
252b5132 RH |
3429 | { |
3430 | int i; | |
3431 | unsigned long carry; | |
3432 | ||
2b47531b | 3433 | exp = symbol_get_value_expression (exp->X_add_symbol); |
252b5132 RH |
3434 | |
3435 | /* Negate the bignum: one's complement each digit and add 1. */ | |
3436 | carry = 1; | |
3437 | for (i = 0; i < exp->X_add_number; i++) | |
3438 | { | |
3439 | unsigned long next; | |
3440 | ||
3441 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
3442 | & LITTLENUM_MASK) | |
3443 | + carry); | |
3444 | generic_bignum[i] = next & LITTLENUM_MASK; | |
3445 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
3446 | } | |
3447 | ||
3448 | /* We can ignore any carry out, because it will be handled by | |
3449 | extra_digit if it is needed. */ | |
3450 | ||
3451 | extra_digit = (valueT) -1; | |
3452 | op = O_big; | |
3453 | } | |
3454 | ||
3455 | if (op == O_absent || op == O_illegal) | |
3456 | { | |
3457 | as_warn (_("zero assumed for missing expression")); | |
3458 | exp->X_add_number = 0; | |
3459 | op = O_constant; | |
3460 | } | |
3461 | else if (op == O_big && exp->X_add_number <= 0) | |
3462 | { | |
3463 | as_bad (_("floating point number invalid; zero assumed")); | |
3464 | exp->X_add_number = 0; | |
3465 | op = O_constant; | |
3466 | } | |
3467 | else if (op == O_register) | |
3468 | { | |
3469 | as_warn (_("register value used as expression")); | |
3470 | op = O_constant; | |
3471 | } | |
3472 | ||
3473 | p = frag_more ((int) nbytes); | |
3474 | ||
3475 | #ifndef WORKING_DOT_WORD | |
3476 | /* If we have the difference of two symbols in a word, save it on | |
3477 | the broken_words list. See the code in write.c. */ | |
3478 | if (op == O_subtract && nbytes == 2) | |
3479 | { | |
3480 | struct broken_word *x; | |
3481 | ||
3482 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
3483 | x->next_broken_word = broken_words; | |
3484 | broken_words = x; | |
3485 | x->seg = now_seg; | |
3486 | x->subseg = now_subseg; | |
3487 | x->frag = frag_now; | |
3488 | x->word_goes_here = p; | |
3489 | x->dispfrag = 0; | |
3490 | x->add = exp->X_add_symbol; | |
3491 | x->sub = exp->X_op_symbol; | |
3492 | x->addnum = exp->X_add_number; | |
3493 | x->added = 0; | |
3494 | new_broken_words++; | |
3495 | return; | |
3496 | } | |
3497 | #endif | |
3498 | ||
3499 | /* If we have an integer, but the number of bytes is too large to | |
3500 | pass to md_number_to_chars, handle it as a bignum. */ | |
3501 | if (op == O_constant && nbytes > sizeof (valueT)) | |
3502 | { | |
3503 | valueT val; | |
3504 | int gencnt; | |
3505 | ||
3506 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
3507 | extra_digit = (valueT) -1; | |
3508 | val = (valueT) exp->X_add_number; | |
3509 | gencnt = 0; | |
3510 | do | |
3511 | { | |
3512 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
3513 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
3514 | ++gencnt; | |
3515 | } | |
3516 | while (val != 0); | |
3517 | op = exp->X_op = O_big; | |
3518 | exp->X_add_number = gencnt; | |
3519 | } | |
3520 | ||
3521 | if (op == O_constant) | |
3522 | { | |
3523 | register valueT get; | |
3524 | register valueT use; | |
3525 | register valueT mask; | |
3526 | valueT hibit; | |
3527 | register valueT unmask; | |
3528 | ||
3529 | /* JF << of >= number of bits in the object is undefined. In | |
3530 | particular SPARC (Sun 4) has problems */ | |
3531 | if (nbytes >= sizeof (valueT)) | |
3532 | { | |
3533 | mask = 0; | |
3534 | if (nbytes > sizeof (valueT)) | |
3535 | hibit = 0; | |
3536 | else | |
3537 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3538 | } | |
3539 | else | |
3540 | { | |
3541 | /* Don't store these bits. */ | |
3542 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); | |
3543 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3544 | } | |
3545 | ||
3546 | unmask = ~mask; /* Do store these bits. */ | |
3547 | ||
3548 | #ifdef NEVER | |
3549 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
3550 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
3551 | #endif | |
3552 | ||
3553 | get = exp->X_add_number; | |
3554 | use = get & unmask; | |
3555 | if ((get & mask) != 0 | |
3556 | && ((get & mask) != mask | |
3557 | || (get & hibit) == 0)) | |
3558 | { /* Leading bits contain both 0s & 1s. */ | |
3559 | as_warn (_("Value 0x%lx truncated to 0x%lx."), | |
3560 | (unsigned long) get, (unsigned long) use); | |
3561 | } | |
3562 | /* put bytes in right order. */ | |
3563 | md_number_to_chars (p, use, (int) nbytes); | |
3564 | } | |
3565 | else if (op == O_big) | |
3566 | { | |
3567 | unsigned int size; | |
3568 | LITTLENUM_TYPE *nums; | |
3569 | ||
3570 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
3571 | ||
3572 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
3573 | if (nbytes < size) | |
3574 | { | |
3575 | as_warn (_("Bignum truncated to %d bytes"), nbytes); | |
3576 | size = nbytes; | |
3577 | } | |
3578 | ||
3579 | if (target_big_endian) | |
3580 | { | |
3581 | while (nbytes > size) | |
3582 | { | |
3583 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3584 | nbytes -= CHARS_PER_LITTLENUM; | |
3585 | p += CHARS_PER_LITTLENUM; | |
3586 | } | |
3587 | ||
3588 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
3589 | while (size > 0) | |
3590 | { | |
3591 | --nums; | |
3592 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3593 | size -= CHARS_PER_LITTLENUM; | |
3594 | p += CHARS_PER_LITTLENUM; | |
3595 | } | |
3596 | } | |
3597 | else | |
3598 | { | |
3599 | nums = generic_bignum; | |
3600 | while (size > 0) | |
3601 | { | |
3602 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3603 | ++nums; | |
3604 | size -= CHARS_PER_LITTLENUM; | |
3605 | p += CHARS_PER_LITTLENUM; | |
3606 | nbytes -= CHARS_PER_LITTLENUM; | |
3607 | } | |
3608 | ||
3609 | while (nbytes > 0) | |
3610 | { | |
3611 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3612 | nbytes -= CHARS_PER_LITTLENUM; | |
3613 | p += CHARS_PER_LITTLENUM; | |
3614 | } | |
3615 | } | |
3616 | } | |
3617 | else | |
3618 | { | |
3619 | memset (p, 0, nbytes); | |
3620 | ||
3621 | /* Now we need to generate a fixS to record the symbol value. | |
3622 | This is easy for BFD. For other targets it can be more | |
3623 | complex. For very complex cases (currently, the HPPA and | |
3624 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
3625 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
3626 | the name of the reloc code that should be stored in the fixS. | |
3627 | If neither is defined, the code uses NO_RELOC if it is | |
3628 | defined, and otherwise uses 0. */ | |
3629 | ||
3630 | #ifdef BFD_ASSEMBLER | |
3631 | #ifdef TC_CONS_FIX_NEW | |
3632 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3633 | #else | |
3634 | { | |
3635 | bfd_reloc_code_real_type r; | |
3636 | ||
3637 | switch (nbytes) | |
3638 | { | |
3639 | case 1: | |
3640 | r = BFD_RELOC_8; | |
3641 | break; | |
3642 | case 2: | |
3643 | r = BFD_RELOC_16; | |
3644 | break; | |
3645 | case 4: | |
3646 | r = BFD_RELOC_32; | |
3647 | break; | |
3648 | case 8: | |
3649 | r = BFD_RELOC_64; | |
3650 | break; | |
3651 | default: | |
3652 | as_bad (_("unsupported BFD relocation size %u"), nbytes); | |
3653 | r = BFD_RELOC_32; | |
3654 | break; | |
3655 | } | |
3656 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, | |
3657 | 0, r); | |
3658 | } | |
3659 | #endif | |
3660 | #else | |
3661 | #ifdef TC_CONS_FIX_NEW | |
3662 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3663 | #else | |
3664 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
3665 | it is defined, otherwise use NO_RELOC if it is defined, | |
3666 | otherwise use 0. */ | |
3667 | #ifndef TC_CONS_RELOC | |
3668 | #ifdef NO_RELOC | |
3669 | #define TC_CONS_RELOC NO_RELOC | |
3670 | #else | |
3671 | #define TC_CONS_RELOC 0 | |
3672 | #endif | |
3673 | #endif | |
3674 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, | |
3675 | TC_CONS_RELOC); | |
3676 | #endif /* TC_CONS_FIX_NEW */ | |
3677 | #endif /* BFD_ASSEMBLER */ | |
3678 | } | |
3679 | } | |
3680 | \f | |
3681 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3682 | ||
3683 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as | |
3684 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
3685 | then pack them all together. We do a little better in that we allow | |
3686 | them in words, longs, etc. and we'll pack them in target byte order | |
3687 | for you. | |
3688 | ||
3689 | The rules are: pack least significat bit first, if a field doesn't | |
3690 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
3691 | explicitly *not* even a warning. The bitwidth should be considered | |
3692 | a "mask". | |
3693 | ||
3694 | To use this function the tc-XXX.h file should define | |
3695 | BITFIELD_CONS_EXPRESSIONS. */ | |
3696 | ||
3697 | static void | |
3698 | parse_bitfield_cons (exp, nbytes) | |
3699 | expressionS *exp; | |
3700 | unsigned int nbytes; | |
3701 | { | |
3702 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
3703 | char *hold = input_line_pointer; | |
3704 | ||
3705 | (void) expression (exp); | |
3706 | ||
3707 | if (*input_line_pointer == ':') | |
3708 | { /* bitfields */ | |
3709 | long value = 0; | |
3710 | ||
3711 | for (;;) | |
3712 | { | |
3713 | unsigned long width; | |
3714 | ||
3715 | if (*input_line_pointer != ':') | |
3716 | { | |
3717 | input_line_pointer = hold; | |
3718 | break; | |
3719 | } /* next piece is not a bitfield */ | |
3720 | ||
3721 | /* In the general case, we can't allow | |
3722 | full expressions with symbol | |
3723 | differences and such. The relocation | |
3724 | entries for symbols not defined in this | |
3725 | assembly would require arbitrary field | |
3726 | widths, positions, and masks which most | |
3727 | of our current object formats don't | |
3728 | support. | |
3729 | ||
3730 | In the specific case where a symbol | |
3731 | *is* defined in this assembly, we | |
3732 | *could* build fixups and track it, but | |
3733 | this could lead to confusion for the | |
3734 | backends. I'm lazy. I'll take any | |
3735 | SEG_ABSOLUTE. I think that means that | |
3736 | you can use a previous .set or | |
3737 | .equ type symbol. xoxorich. */ | |
3738 | ||
3739 | if (exp->X_op == O_absent) | |
3740 | { | |
3741 | as_warn (_("using a bit field width of zero")); | |
3742 | exp->X_add_number = 0; | |
3743 | exp->X_op = O_constant; | |
3744 | } /* implied zero width bitfield */ | |
3745 | ||
3746 | if (exp->X_op != O_constant) | |
3747 | { | |
3748 | *input_line_pointer = '\0'; | |
3749 | as_bad (_("field width \"%s\" too complex for a bitfield"), hold); | |
3750 | *input_line_pointer = ':'; | |
3751 | demand_empty_rest_of_line (); | |
3752 | return; | |
3753 | } /* too complex */ | |
3754 | ||
3755 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
3756 | { | |
3757 | as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"), | |
3758 | width, nbytes, (BITS_PER_CHAR * nbytes)); | |
3759 | width = BITS_PER_CHAR * nbytes; | |
3760 | } /* too big */ | |
3761 | ||
3762 | if (width > bits_available) | |
3763 | { | |
3764 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ | |
3765 | input_line_pointer = hold; | |
3766 | exp->X_add_number = value; | |
3767 | break; | |
3768 | } /* won't fit */ | |
3769 | ||
3770 | hold = ++input_line_pointer; /* skip ':' */ | |
3771 | ||
3772 | (void) expression (exp); | |
3773 | if (exp->X_op != O_constant) | |
3774 | { | |
3775 | char cache = *input_line_pointer; | |
3776 | ||
3777 | *input_line_pointer = '\0'; | |
3778 | as_bad (_("field value \"%s\" too complex for a bitfield"), hold); | |
3779 | *input_line_pointer = cache; | |
3780 | demand_empty_rest_of_line (); | |
3781 | return; | |
3782 | } /* too complex */ | |
3783 | ||
3784 | value |= ((~(-1 << width) & exp->X_add_number) | |
3785 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
3786 | ||
3787 | if ((bits_available -= width) == 0 | |
3788 | || is_it_end_of_statement () | |
3789 | || *input_line_pointer != ',') | |
3790 | { | |
3791 | break; | |
3792 | } /* all the bitfields we're gonna get */ | |
3793 | ||
3794 | hold = ++input_line_pointer; | |
3795 | (void) expression (exp); | |
3796 | } /* forever loop */ | |
3797 | ||
3798 | exp->X_add_number = value; | |
3799 | exp->X_op = O_constant; | |
3800 | exp->X_unsigned = 1; | |
3801 | } /* if looks like a bitfield */ | |
3802 | } /* parse_bitfield_cons() */ | |
3803 | ||
3804 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
3805 | \f | |
3806 | /* Handle an MRI style string expression. */ | |
3807 | ||
3808 | static void | |
3809 | parse_mri_cons (exp, nbytes) | |
3810 | expressionS *exp; | |
3811 | unsigned int nbytes; | |
3812 | { | |
3813 | if (*input_line_pointer != '\'' | |
3814 | && (input_line_pointer[1] != '\'' | |
3815 | || (*input_line_pointer != 'A' | |
3816 | && *input_line_pointer != 'E'))) | |
3817 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); | |
3818 | else | |
3819 | { | |
3820 | unsigned int scan; | |
3821 | unsigned int result = 0; | |
3822 | ||
3823 | /* An MRI style string. Cut into as many bytes as will fit into | |
3824 | a nbyte chunk, left justify if necessary, and separate with | |
3825 | commas so we can try again later. */ | |
3826 | if (*input_line_pointer == 'A') | |
3827 | ++input_line_pointer; | |
3828 | else if (*input_line_pointer == 'E') | |
3829 | { | |
3830 | as_bad (_("EBCDIC constants are not supported")); | |
3831 | ++input_line_pointer; | |
3832 | } | |
3833 | ||
3834 | input_line_pointer++; | |
3835 | for (scan = 0; scan < nbytes; scan++) | |
3836 | { | |
3837 | if (*input_line_pointer == '\'') | |
3838 | { | |
3839 | if (input_line_pointer[1] == '\'') | |
3840 | { | |
3841 | input_line_pointer++; | |
3842 | } | |
3843 | else | |
3844 | break; | |
3845 | } | |
3846 | result = (result << 8) | (*input_line_pointer++); | |
3847 | } | |
3848 | ||
3849 | /* Left justify */ | |
3850 | while (scan < nbytes) | |
3851 | { | |
3852 | result <<= 8; | |
3853 | scan++; | |
3854 | } | |
3855 | /* Create correct expression */ | |
3856 | exp->X_op = O_constant; | |
3857 | exp->X_add_number = result; | |
3858 | /* Fake it so that we can read the next char too */ | |
3859 | if (input_line_pointer[0] != '\'' || | |
3860 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
3861 | { | |
3862 | input_line_pointer -= 2; | |
3863 | input_line_pointer[0] = ','; | |
3864 | input_line_pointer[1] = '\''; | |
3865 | } | |
3866 | else | |
3867 | input_line_pointer++; | |
3868 | } | |
3869 | } | |
3870 | \f | |
3871 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3872 | ||
3873 | /* Parse a repeat expression for cons. This is used by the MIPS | |
3874 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
3875 | object file COUNT times. | |
3876 | ||
3877 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
3878 | ||
3879 | static void | |
3880 | parse_repeat_cons (exp, nbytes) | |
3881 | expressionS *exp; | |
3882 | unsigned int nbytes; | |
3883 | { | |
3884 | expressionS count; | |
3885 | register int i; | |
3886 | ||
3887 | expression (exp); | |
3888 | ||
3889 | if (*input_line_pointer != ':') | |
3890 | { | |
3891 | /* No repeat count. */ | |
3892 | return; | |
3893 | } | |
3894 | ||
3895 | ++input_line_pointer; | |
3896 | expression (&count); | |
3897 | if (count.X_op != O_constant | |
3898 | || count.X_add_number <= 0) | |
3899 | { | |
3900 | as_warn (_("Unresolvable or nonpositive repeat count; using 1")); | |
3901 | return; | |
3902 | } | |
3903 | ||
3904 | /* The cons function is going to output this expression once. So we | |
3905 | output it count - 1 times. */ | |
3906 | for (i = count.X_add_number - 1; i > 0; i--) | |
3907 | emit_expr (exp, nbytes); | |
3908 | } | |
3909 | ||
3910 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
3911 | \f | |
3912 | /* Parse a floating point number represented as a hex constant. This | |
3913 | permits users to specify the exact bits they want in the floating | |
3914 | point number. */ | |
3915 | ||
3916 | static int | |
3917 | hex_float (float_type, bytes) | |
3918 | int float_type; | |
3919 | char *bytes; | |
3920 | { | |
3921 | int length; | |
3922 | int i; | |
3923 | ||
3924 | switch (float_type) | |
3925 | { | |
3926 | case 'f': | |
3927 | case 'F': | |
3928 | case 's': | |
3929 | case 'S': | |
3930 | length = 4; | |
3931 | break; | |
3932 | ||
3933 | case 'd': | |
3934 | case 'D': | |
3935 | case 'r': | |
3936 | case 'R': | |
3937 | length = 8; | |
3938 | break; | |
3939 | ||
3940 | case 'x': | |
3941 | case 'X': | |
3942 | length = 12; | |
3943 | break; | |
3944 | ||
3945 | case 'p': | |
3946 | case 'P': | |
3947 | length = 12; | |
3948 | break; | |
3949 | ||
3950 | default: | |
3951 | as_bad (_("Unknown floating type type '%c'"), float_type); | |
3952 | return -1; | |
3953 | } | |
3954 | ||
3955 | /* It would be nice if we could go through expression to parse the | |
3956 | hex constant, but if we get a bignum it's a pain to sort it into | |
3957 | the buffer correctly. */ | |
3958 | i = 0; | |
3959 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') | |
3960 | { | |
3961 | int d; | |
3962 | ||
3963 | /* The MRI assembler accepts arbitrary underscores strewn about | |
3964 | through the hex constant, so we ignore them as well. */ | |
3965 | if (*input_line_pointer == '_') | |
3966 | { | |
3967 | ++input_line_pointer; | |
3968 | continue; | |
3969 | } | |
3970 | ||
3971 | if (i >= length) | |
3972 | { | |
3973 | as_warn (_("Floating point constant too large")); | |
3974 | return -1; | |
3975 | } | |
3976 | d = hex_value (*input_line_pointer) << 4; | |
3977 | ++input_line_pointer; | |
3978 | while (*input_line_pointer == '_') | |
3979 | ++input_line_pointer; | |
3980 | if (hex_p (*input_line_pointer)) | |
3981 | { | |
3982 | d += hex_value (*input_line_pointer); | |
3983 | ++input_line_pointer; | |
3984 | } | |
3985 | if (target_big_endian) | |
3986 | bytes[i] = d; | |
3987 | else | |
3988 | bytes[length - i - 1] = d; | |
3989 | ++i; | |
3990 | } | |
3991 | ||
3992 | if (i < length) | |
3993 | { | |
3994 | if (target_big_endian) | |
3995 | memset (bytes + i, 0, length - i); | |
3996 | else | |
3997 | memset (bytes, 0, length - i); | |
3998 | } | |
3999 | ||
4000 | return length; | |
4001 | } | |
4002 | ||
4003 | /* | |
4004 | * float_cons() | |
4005 | * | |
4006 | * CONStruct some more frag chars of .floats .ffloats etc. | |
4007 | * Makes 0 or more new frags. | |
4008 | * If need_pass_2 == 1, no frags are emitted. | |
4009 | * This understands only floating literals, not expressions. Sorry. | |
4010 | * | |
4011 | * A floating constant is defined by atof_generic(), except it is preceded | |
4012 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
4013 | * reading, I decided to be incompatible. This always tries to give you | |
4014 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
4015 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
4016 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
4017 | * scanners you directed AS to use. | |
4018 | * | |
4019 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
4020 | * | |
4021 | */ | |
4022 | ||
4023 | void | |
4024 | float_cons (float_type) | |
4025 | /* Clobbers input_line-pointer, checks end-of-line. */ | |
4026 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ | |
4027 | { | |
4028 | register char *p; | |
4029 | int length; /* Number of chars in an object. */ | |
4030 | register char *err; /* Error from scanning floating literal. */ | |
4031 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
4032 | ||
4033 | if (is_it_end_of_statement ()) | |
4034 | { | |
4035 | demand_empty_rest_of_line (); | |
4036 | return; | |
4037 | } | |
4038 | ||
4039 | #ifdef md_flush_pending_output | |
4040 | md_flush_pending_output (); | |
4041 | #endif | |
4042 | ||
4043 | do | |
4044 | { | |
4045 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
4046 | SKIP_WHITESPACE (); | |
4047 | ||
4048 | /* Skip any 0{letter} that may be present. Don't even check if the | |
4049 | * letter is legal. Someone may invent a "z" format and this routine | |
4050 | * has no use for such information. Lusers beware: you get | |
4051 | * diagnostics if your input is ill-conditioned. | |
4052 | */ | |
4053 | if (input_line_pointer[0] == '0' | |
4054 | && isalpha ((unsigned char) input_line_pointer[1])) | |
4055 | input_line_pointer += 2; | |
4056 | ||
4057 | /* Accept :xxxx, where the x's are hex digits, for a floating | |
4058 | point with the exact digits specified. */ | |
4059 | if (input_line_pointer[0] == ':') | |
4060 | { | |
4061 | ++input_line_pointer; | |
4062 | length = hex_float (float_type, temp); | |
4063 | if (length < 0) | |
4064 | { | |
4065 | ignore_rest_of_line (); | |
4066 | return; | |
4067 | } | |
4068 | } | |
4069 | else | |
4070 | { | |
4071 | err = md_atof (float_type, temp, &length); | |
4072 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
4073 | know (length > 0); | |
4074 | if (err) | |
4075 | { | |
4076 | as_bad (_("Bad floating literal: %s"), err); | |
4077 | ignore_rest_of_line (); | |
4078 | return; | |
4079 | } | |
4080 | } | |
4081 | ||
4082 | if (!need_pass_2) | |
4083 | { | |
4084 | int count; | |
4085 | ||
4086 | count = 1; | |
4087 | ||
4088 | #ifdef REPEAT_CONS_EXPRESSIONS | |
4089 | if (*input_line_pointer == ':') | |
4090 | { | |
4091 | expressionS count_exp; | |
4092 | ||
4093 | ++input_line_pointer; | |
4094 | expression (&count_exp); | |
4095 | if (count_exp.X_op != O_constant | |
4096 | || count_exp.X_add_number <= 0) | |
4097 | { | |
4098 | as_warn (_("unresolvable or nonpositive repeat count; using 1")); | |
4099 | } | |
4100 | else | |
4101 | count = count_exp.X_add_number; | |
4102 | } | |
4103 | #endif | |
4104 | ||
4105 | while (--count >= 0) | |
4106 | { | |
4107 | p = frag_more (length); | |
4108 | memcpy (p, temp, (unsigned int) length); | |
4109 | } | |
4110 | } | |
4111 | SKIP_WHITESPACE (); | |
4112 | } | |
4113 | while (*input_line_pointer++ == ','); | |
4114 | ||
4115 | --input_line_pointer; /* Put terminator back into stream. */ | |
4116 | demand_empty_rest_of_line (); | |
4117 | } /* float_cons() */ | |
4118 | \f | |
4119 | /* Return the size of a LEB128 value */ | |
4120 | ||
4121 | static inline int | |
4122 | sizeof_sleb128 (value) | |
4123 | offsetT value; | |
4124 | { | |
4125 | register int size = 0; | |
4126 | register unsigned byte; | |
4127 | ||
4128 | do | |
4129 | { | |
4130 | byte = (value & 0x7f); | |
4131 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4132 | Fortunately, we can structure things so that the extra work reduces | |
4133 | to a noop on systems that do things "properly". */ | |
4134 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4135 | size += 1; | |
4136 | } | |
4137 | while (!(((value == 0) && ((byte & 0x40) == 0)) | |
4138 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4139 | ||
4140 | return size; | |
4141 | } | |
4142 | ||
4143 | static inline int | |
4144 | sizeof_uleb128 (value) | |
4145 | valueT value; | |
4146 | { | |
4147 | register int size = 0; | |
4148 | register unsigned byte; | |
4149 | ||
4150 | do | |
4151 | { | |
4152 | byte = (value & 0x7f); | |
4153 | value >>= 7; | |
4154 | size += 1; | |
4155 | } | |
4156 | while (value != 0); | |
4157 | ||
4158 | return size; | |
4159 | } | |
4160 | ||
4161 | int | |
4162 | sizeof_leb128 (value, sign) | |
4163 | valueT value; | |
4164 | int sign; | |
4165 | { | |
4166 | if (sign) | |
4167 | return sizeof_sleb128 ((offsetT) value); | |
4168 | else | |
4169 | return sizeof_uleb128 (value); | |
4170 | } | |
4171 | ||
4172 | /* Output a LEB128 value. */ | |
4173 | ||
4174 | static inline int | |
4175 | output_sleb128 (p, value) | |
4176 | char *p; | |
4177 | offsetT value; | |
4178 | { | |
4179 | register char *orig = p; | |
4180 | register int more; | |
4181 | ||
4182 | do | |
4183 | { | |
4184 | unsigned byte = (value & 0x7f); | |
4185 | ||
4186 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4187 | Fortunately, we can structure things so that the extra work reduces | |
4188 | to a noop on systems that do things "properly". */ | |
4189 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4190 | ||
4191 | more = !((((value == 0) && ((byte & 0x40) == 0)) | |
4192 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4193 | if (more) | |
4194 | byte |= 0x80; | |
4195 | ||
4196 | *p++ = byte; | |
4197 | } | |
4198 | while (more); | |
4199 | ||
4200 | return p - orig; | |
4201 | } | |
4202 | ||
4203 | static inline int | |
4204 | output_uleb128 (p, value) | |
4205 | char *p; | |
4206 | valueT value; | |
4207 | { | |
4208 | char *orig = p; | |
4209 | ||
4210 | do | |
4211 | { | |
4212 | unsigned byte = (value & 0x7f); | |
4213 | value >>= 7; | |
4214 | if (value != 0) | |
4215 | /* More bytes to follow. */ | |
4216 | byte |= 0x80; | |
4217 | ||
4218 | *p++ = byte; | |
4219 | } | |
4220 | while (value != 0); | |
4221 | ||
4222 | return p - orig; | |
4223 | } | |
4224 | ||
4225 | int | |
4226 | output_leb128 (p, value, sign) | |
4227 | char *p; | |
4228 | valueT value; | |
4229 | int sign; | |
4230 | { | |
4231 | if (sign) | |
4232 | return output_sleb128 (p, (offsetT) value); | |
4233 | else | |
4234 | return output_uleb128 (p, value); | |
4235 | } | |
4236 | ||
4237 | /* Do the same for bignums. We combine sizeof with output here in that | |
4238 | we don't output for NULL values of P. It isn't really as critical as | |
4239 | for "normal" values that this be streamlined. */ | |
4240 | ||
6d4d30bb | 4241 | static inline int |
252b5132 RH |
4242 | output_big_sleb128 (p, bignum, size) |
4243 | char *p; | |
4244 | LITTLENUM_TYPE *bignum; | |
4245 | int size; | |
4246 | { | |
4247 | char *orig = p; | |
4248 | valueT val = 0; | |
4249 | int loaded = 0; | |
4250 | unsigned byte; | |
4251 | ||
4252 | /* Strip leading sign extensions off the bignum. */ | |
4253 | while (size > 0 && bignum[size-1] == (LITTLENUM_TYPE)-1) | |
4254 | size--; | |
4255 | ||
4256 | do | |
4257 | { | |
4258 | if (loaded < 7 && size > 0) | |
4259 | { | |
4260 | val |= (*bignum << loaded); | |
4261 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4262 | size--; | |
4263 | bignum++; | |
4264 | } | |
4265 | ||
4266 | byte = val & 0x7f; | |
4267 | loaded -= 7; | |
4268 | val >>= 7; | |
4269 | ||
4270 | if (size == 0) | |
4271 | { | |
4272 | if ((val == 0 && (byte & 0x40) == 0) | |
4273 | || (~(val | ~(((valueT)1 << loaded) - 1)) == 0 | |
4274 | && (byte & 0x40) != 0)) | |
4275 | byte |= 0x80; | |
4276 | } | |
4277 | ||
4278 | if (orig) | |
4279 | *p = byte; | |
4280 | p++; | |
4281 | } | |
4282 | while (byte & 0x80); | |
4283 | ||
4284 | return p - orig; | |
4285 | } | |
4286 | ||
6d4d30bb | 4287 | static inline int |
252b5132 RH |
4288 | output_big_uleb128 (p, bignum, size) |
4289 | char *p; | |
4290 | LITTLENUM_TYPE *bignum; | |
4291 | int size; | |
4292 | { | |
4293 | char *orig = p; | |
4294 | valueT val = 0; | |
4295 | int loaded = 0; | |
4296 | unsigned byte; | |
4297 | ||
4298 | /* Strip leading zeros off the bignum. */ | |
4299 | /* XXX: Is this needed? */ | |
4300 | while (size > 0 && bignum[size-1] == 0) | |
4301 | size--; | |
4302 | ||
4303 | do | |
4304 | { | |
4305 | if (loaded < 7 && size > 0) | |
4306 | { | |
4307 | val |= (*bignum << loaded); | |
4308 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4309 | size--; | |
4310 | bignum++; | |
4311 | } | |
4312 | ||
4313 | byte = val & 0x7f; | |
4314 | loaded -= 7; | |
4315 | val >>= 7; | |
4316 | ||
4317 | if (size > 0 || val) | |
4318 | byte |= 0x80; | |
4319 | ||
4320 | if (orig) | |
4321 | *p = byte; | |
4322 | p++; | |
4323 | } | |
4324 | while (byte & 0x80); | |
4325 | ||
4326 | return p - orig; | |
4327 | } | |
4328 | ||
6d4d30bb | 4329 | static int |
252b5132 RH |
4330 | output_big_leb128 (p, bignum, size, sign) |
4331 | char *p; | |
4332 | LITTLENUM_TYPE *bignum; | |
4333 | int size, sign; | |
4334 | { | |
4335 | if (sign) | |
4336 | return output_big_sleb128 (p, bignum, size); | |
4337 | else | |
4338 | return output_big_uleb128 (p, bignum, size); | |
4339 | } | |
4340 | ||
4341 | /* Generate the appropriate fragments for a given expression to emit a | |
4342 | leb128 value. */ | |
4343 | ||
4344 | void | |
4345 | emit_leb128_expr(exp, sign) | |
4346 | expressionS *exp; | |
4347 | int sign; | |
4348 | { | |
4349 | operatorT op = exp->X_op; | |
4350 | ||
4351 | if (op == O_absent || op == O_illegal) | |
4352 | { | |
4353 | as_warn (_("zero assumed for missing expression")); | |
4354 | exp->X_add_number = 0; | |
4355 | op = O_constant; | |
4356 | } | |
4357 | else if (op == O_big && exp->X_add_number <= 0) | |
4358 | { | |
4359 | as_bad (_("floating point number invalid; zero assumed")); | |
4360 | exp->X_add_number = 0; | |
4361 | op = O_constant; | |
4362 | } | |
4363 | else if (op == O_register) | |
4364 | { | |
4365 | as_warn (_("register value used as expression")); | |
4366 | op = O_constant; | |
4367 | } | |
4368 | ||
4369 | if (op == O_constant) | |
4370 | { | |
4371 | /* If we've got a constant, emit the thing directly right now. */ | |
4372 | ||
4373 | valueT value = exp->X_add_number; | |
4374 | int size; | |
4375 | char *p; | |
4376 | ||
4377 | size = sizeof_leb128 (value, sign); | |
4378 | p = frag_more (size); | |
4379 | output_leb128 (p, value, sign); | |
4380 | } | |
4381 | else if (op == O_big) | |
4382 | { | |
4383 | /* O_big is a different sort of constant. */ | |
4384 | ||
4385 | int size; | |
4386 | char *p; | |
4387 | ||
4388 | size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign); | |
4389 | p = frag_more (size); | |
4390 | output_big_leb128 (p, generic_bignum, exp->X_add_number, sign); | |
4391 | } | |
4392 | else | |
4393 | { | |
4394 | /* Otherwise, we have to create a variable sized fragment and | |
4395 | resolve things later. */ | |
4396 | ||
4397 | frag_var (rs_leb128, sizeof_uleb128 (~(valueT)0), 0, sign, | |
4398 | make_expr_symbol (exp), 0, (char *) NULL); | |
4399 | } | |
4400 | } | |
4401 | ||
4402 | /* Parse the .sleb128 and .uleb128 pseudos. */ | |
4403 | ||
4404 | void | |
4405 | s_leb128 (sign) | |
4406 | int sign; | |
4407 | { | |
4408 | expressionS exp; | |
4409 | ||
4410 | do { | |
4411 | expression (&exp); | |
4412 | emit_leb128_expr (&exp, sign); | |
4413 | } while (*input_line_pointer++ == ','); | |
4414 | ||
4415 | input_line_pointer--; | |
4416 | demand_empty_rest_of_line (); | |
4417 | } | |
4418 | \f | |
4419 | /* | |
4420 | * stringer() | |
4421 | * | |
1c32af22 | 4422 | * We read 0 or more ',' separated, double-quoted strings. |
252b5132 RH |
4423 | * |
4424 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
4425 | */ | |
4426 | ||
4427 | ||
4428 | void | |
4429 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
4430 | /* Checks end-of-line. */ | |
4431 | register int append_zero; /* 0: don't append '\0', else 1 */ | |
4432 | { | |
4433 | register unsigned int c; | |
4434 | char *start; | |
4435 | ||
4436 | #ifdef md_flush_pending_output | |
4437 | md_flush_pending_output (); | |
4438 | #endif | |
4439 | ||
4440 | /* | |
4441 | * The following awkward logic is to parse ZERO or more strings, | |
4442 | * comma separated. Recall a string expression includes spaces | |
4443 | * before the opening '\"' and spaces after the closing '\"'. | |
4444 | * We fake a leading ',' if there is (supposed to be) | |
4445 | * a 1st, expression. We keep demanding expressions for each | |
4446 | * ','. | |
4447 | */ | |
4448 | if (is_it_end_of_statement ()) | |
4449 | { | |
4450 | c = 0; /* Skip loop. */ | |
4451 | ++input_line_pointer; /* Compensate for end of loop. */ | |
4452 | } | |
4453 | else | |
4454 | { | |
4455 | c = ','; /* Do loop. */ | |
4456 | } | |
4457 | while (c == ',' || c == '<' || c == '"') | |
4458 | { | |
4459 | SKIP_WHITESPACE (); | |
4460 | switch (*input_line_pointer) | |
4461 | { | |
4462 | case '\"': | |
4463 | ++input_line_pointer; /*->1st char of string. */ | |
4464 | start = input_line_pointer; | |
4465 | while (is_a_char (c = next_char_of_string ())) | |
4466 | { | |
4467 | FRAG_APPEND_1_CHAR (c); | |
4468 | } | |
4469 | if (append_zero) | |
4470 | { | |
4471 | FRAG_APPEND_1_CHAR (0); | |
4472 | } | |
4473 | know (input_line_pointer[-1] == '\"'); | |
4474 | ||
4475 | #ifndef NO_LISTING | |
4476 | #ifdef OBJ_ELF | |
4477 | /* In ELF, when gcc is emitting DWARF 1 debugging output, it | |
4478 | will emit .string with a filename in the .debug section | |
4479 | after a sequence of constants. See the comment in | |
4480 | emit_expr for the sequence. emit_expr will set | |
4481 | dwarf_file_string to non-zero if this string might be a | |
4482 | source file name. */ | |
4483 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
4484 | dwarf_file_string = 0; | |
4485 | else if (dwarf_file_string) | |
4486 | { | |
4487 | c = input_line_pointer[-1]; | |
4488 | input_line_pointer[-1] = '\0'; | |
4489 | listing_source_file (start); | |
4490 | input_line_pointer[-1] = c; | |
4491 | } | |
4492 | #endif | |
4493 | #endif | |
4494 | ||
4495 | break; | |
4496 | case '<': | |
4497 | input_line_pointer++; | |
4498 | c = get_single_number (); | |
4499 | FRAG_APPEND_1_CHAR (c); | |
4500 | if (*input_line_pointer != '>') | |
4501 | { | |
4502 | as_bad (_("Expected <nn>")); | |
4503 | } | |
4504 | input_line_pointer++; | |
4505 | break; | |
4506 | case ',': | |
4507 | input_line_pointer++; | |
4508 | break; | |
4509 | } | |
4510 | SKIP_WHITESPACE (); | |
4511 | c = *input_line_pointer; | |
4512 | } | |
4513 | ||
4514 | demand_empty_rest_of_line (); | |
4515 | } /* stringer() */ | |
4516 | \f | |
4517 | /* FIXME-SOMEDAY: I had trouble here on characters with the | |
4518 | high bits set. We'll probably also have trouble with | |
4519 | multibyte chars, wide chars, etc. Also be careful about | |
4520 | returning values bigger than 1 byte. xoxorich. */ | |
4521 | ||
4522 | unsigned int | |
4523 | next_char_of_string () | |
4524 | { | |
4525 | register unsigned int c; | |
4526 | ||
4527 | c = *input_line_pointer++ & CHAR_MASK; | |
4528 | switch (c) | |
4529 | { | |
4530 | case '\"': | |
4531 | c = NOT_A_CHAR; | |
4532 | break; | |
4533 | ||
4534 | case '\n': | |
4535 | as_warn (_("Unterminated string: Newline inserted.")); | |
4536 | bump_line_counters (); | |
4537 | break; | |
4538 | ||
4539 | #ifndef NO_STRING_ESCAPES | |
4540 | case '\\': | |
4541 | switch (c = *input_line_pointer++) | |
4542 | { | |
4543 | case 'b': | |
4544 | c = '\b'; | |
4545 | break; | |
4546 | ||
4547 | case 'f': | |
4548 | c = '\f'; | |
4549 | break; | |
4550 | ||
4551 | case 'n': | |
4552 | c = '\n'; | |
4553 | break; | |
4554 | ||
4555 | case 'r': | |
4556 | c = '\r'; | |
4557 | break; | |
4558 | ||
4559 | case 't': | |
4560 | c = '\t'; | |
4561 | break; | |
4562 | ||
4563 | case 'v': | |
4564 | c = '\013'; | |
4565 | break; | |
4566 | ||
4567 | case '\\': | |
4568 | case '"': | |
4569 | break; /* As itself. */ | |
4570 | ||
4571 | case '0': | |
4572 | case '1': | |
4573 | case '2': | |
4574 | case '3': | |
4575 | case '4': | |
4576 | case '5': | |
4577 | case '6': | |
4578 | case '7': | |
4579 | case '8': | |
4580 | case '9': | |
4581 | { | |
4582 | long number; | |
4583 | int i; | |
4584 | ||
4585 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) | |
4586 | { | |
4587 | number = number * 8 + c - '0'; | |
4588 | } | |
4589 | c = number & 0xff; | |
4590 | } | |
4591 | --input_line_pointer; | |
4592 | break; | |
4593 | ||
4594 | case 'x': | |
4595 | case 'X': | |
4596 | { | |
4597 | long number; | |
4598 | ||
4599 | number = 0; | |
4600 | c = *input_line_pointer++; | |
4601 | while (isxdigit (c)) | |
4602 | { | |
4603 | if (isdigit (c)) | |
4604 | number = number * 16 + c - '0'; | |
4605 | else if (isupper (c)) | |
4606 | number = number * 16 + c - 'A' + 10; | |
4607 | else | |
4608 | number = number * 16 + c - 'a' + 10; | |
4609 | c = *input_line_pointer++; | |
4610 | } | |
4611 | c = number & 0xff; | |
4612 | --input_line_pointer; | |
4613 | } | |
4614 | break; | |
4615 | ||
4616 | case '\n': | |
4617 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
4618 | as_warn (_("Unterminated string: Newline inserted.")); | |
4619 | c = '\n'; | |
4620 | bump_line_counters (); | |
4621 | break; | |
4622 | ||
4623 | default: | |
4624 | ||
4625 | #ifdef ONLY_STANDARD_ESCAPES | |
4626 | as_bad (_("Bad escaped character in string, '?' assumed")); | |
4627 | c = '?'; | |
4628 | #endif /* ONLY_STANDARD_ESCAPES */ | |
4629 | ||
4630 | break; | |
4631 | } /* switch on escaped char */ | |
4632 | break; | |
4633 | #endif /* ! defined (NO_STRING_ESCAPES) */ | |
4634 | ||
4635 | default: | |
4636 | break; | |
4637 | } /* switch on char */ | |
4638 | return (c); | |
4639 | } /* next_char_of_string() */ | |
4640 | \f | |
4641 | static segT | |
4642 | get_segmented_expression (expP) | |
4643 | register expressionS *expP; | |
4644 | { | |
4645 | register segT retval; | |
4646 | ||
4647 | retval = expression (expP); | |
4648 | if (expP->X_op == O_illegal | |
4649 | || expP->X_op == O_absent | |
4650 | || expP->X_op == O_big) | |
4651 | { | |
4652 | as_bad (_("expected address expression; zero assumed")); | |
4653 | expP->X_op = O_constant; | |
4654 | expP->X_add_number = 0; | |
4655 | retval = absolute_section; | |
4656 | } | |
4657 | return retval; | |
4658 | } | |
4659 | ||
4660 | static segT | |
4661 | get_known_segmented_expression (expP) | |
4662 | register expressionS *expP; | |
4663 | { | |
4664 | register segT retval; | |
4665 | ||
4666 | if ((retval = get_segmented_expression (expP)) == undefined_section) | |
4667 | { | |
4668 | /* There is no easy way to extract the undefined symbol from the | |
4669 | expression. */ | |
4670 | if (expP->X_add_symbol != NULL | |
4671 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
4672 | as_warn (_("symbol \"%s\" undefined; zero assumed"), | |
4673 | S_GET_NAME (expP->X_add_symbol)); | |
4674 | else | |
4675 | as_warn (_("some symbol undefined; zero assumed")); | |
4676 | retval = absolute_section; | |
4677 | expP->X_op = O_constant; | |
4678 | expP->X_add_number = 0; | |
4679 | } | |
4680 | know (retval == absolute_section || SEG_NORMAL (retval)); | |
4681 | return (retval); | |
4682 | } /* get_known_segmented_expression() */ | |
4683 | ||
4684 | offsetT | |
4685 | get_absolute_expression () | |
4686 | { | |
4687 | expressionS exp; | |
4688 | ||
4689 | expression (&exp); | |
4690 | if (exp.X_op != O_constant) | |
4691 | { | |
4692 | if (exp.X_op != O_absent) | |
4693 | as_bad (_("bad or irreducible absolute expression; zero assumed")); | |
4694 | exp.X_add_number = 0; | |
4695 | } | |
4696 | return exp.X_add_number; | |
4697 | } | |
4698 | ||
4699 | char /* return terminator */ | |
4700 | get_absolute_expression_and_terminator (val_pointer) | |
4701 | long *val_pointer; /* return value of expression */ | |
4702 | { | |
4703 | /* FIXME: val_pointer should probably be offsetT *. */ | |
4704 | *val_pointer = (long) get_absolute_expression (); | |
4705 | return (*input_line_pointer++); | |
4706 | } | |
4707 | \f | |
4708 | /* | |
4709 | * demand_copy_C_string() | |
4710 | * | |
4711 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
4712 | * Give a warning if that happens. | |
4713 | */ | |
4714 | char * | |
4715 | demand_copy_C_string (len_pointer) | |
4716 | int *len_pointer; | |
4717 | { | |
4718 | register char *s; | |
4719 | ||
4720 | if ((s = demand_copy_string (len_pointer)) != 0) | |
4721 | { | |
4722 | register int len; | |
4723 | ||
4724 | for (len = *len_pointer; len > 0; len--) | |
4725 | { | |
4726 | if (*s == 0) | |
4727 | { | |
4728 | s = 0; | |
4729 | len = 1; | |
4730 | *len_pointer = 0; | |
4731 | as_bad (_("This string may not contain \'\\0\'")); | |
4732 | } | |
4733 | } | |
4734 | } | |
4735 | return s; | |
4736 | } | |
4737 | \f | |
4738 | /* | |
4739 | * demand_copy_string() | |
4740 | * | |
4741 | * Demand string, but return a safe (=private) copy of the string. | |
4742 | * Return NULL if we can't read a string here. | |
4743 | */ | |
4744 | char * | |
4745 | demand_copy_string (lenP) | |
4746 | int *lenP; | |
4747 | { | |
4748 | register unsigned int c; | |
4749 | register int len; | |
4750 | char *retval; | |
4751 | ||
4752 | len = 0; | |
4753 | SKIP_WHITESPACE (); | |
4754 | if (*input_line_pointer == '\"') | |
4755 | { | |
4756 | input_line_pointer++; /* Skip opening quote. */ | |
4757 | ||
4758 | while (is_a_char (c = next_char_of_string ())) | |
4759 | { | |
4760 | obstack_1grow (¬es, c); | |
4761 | len++; | |
4762 | } | |
4763 | /* JF this next line is so demand_copy_C_string will return a | |
4764 | null terminated string. */ | |
4765 | obstack_1grow (¬es, '\0'); | |
4766 | retval = obstack_finish (¬es); | |
4767 | } | |
4768 | else | |
4769 | { | |
4770 | as_warn (_("Missing string")); | |
4771 | retval = NULL; | |
4772 | ignore_rest_of_line (); | |
4773 | } | |
4774 | *lenP = len; | |
4775 | return (retval); | |
4776 | } /* demand_copy_string() */ | |
4777 | \f | |
4778 | /* | |
4779 | * is_it_end_of_statement() | |
4780 | * | |
4781 | * In: Input_line_pointer->next character. | |
4782 | * | |
4783 | * Do: Skip input_line_pointer over all whitespace. | |
4784 | * | |
4785 | * Out: 1 if input_line_pointer->end-of-line. | |
4786 | */ | |
4787 | int | |
4788 | is_it_end_of_statement () | |
4789 | { | |
4790 | SKIP_WHITESPACE (); | |
4791 | return (is_end_of_line[(unsigned char) *input_line_pointer]); | |
4792 | } /* is_it_end_of_statement() */ | |
4793 | ||
4794 | void | |
4795 | equals (sym_name, reassign) | |
4796 | char *sym_name; | |
4797 | int reassign; | |
4798 | { | |
4799 | register symbolS *symbolP; /* symbol we are working with */ | |
4800 | char *stop = NULL; | |
4801 | char stopc; | |
4802 | ||
4803 | input_line_pointer++; | |
4804 | if (*input_line_pointer == '=') | |
4805 | input_line_pointer++; | |
4806 | ||
4807 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') | |
4808 | input_line_pointer++; | |
4809 | ||
4810 | if (flag_mri) | |
4811 | stop = mri_comment_field (&stopc); | |
4812 | ||
4813 | if (sym_name[0] == '.' && sym_name[1] == '\0') | |
4814 | { | |
4815 | /* Turn '. = mumble' into a .org mumble */ | |
4816 | register segT segment; | |
4817 | expressionS exp; | |
4818 | ||
4819 | segment = get_known_segmented_expression (&exp); | |
4820 | if (!need_pass_2) | |
4821 | do_org (segment, &exp, 0); | |
4822 | } | |
4823 | else | |
4824 | { | |
4825 | symbolP = symbol_find_or_make (sym_name); | |
4826 | /* Permit register names to be redefined. */ | |
4827 | if (! reassign | |
4828 | && S_IS_DEFINED (symbolP) | |
4829 | && S_GET_SEGMENT (symbolP) != reg_section) | |
4830 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
4831 | pseudo_set (symbolP); | |
4832 | } | |
4833 | ||
4834 | if (flag_mri) | |
4835 | { | |
4836 | ignore_rest_of_line (); /* check garbage after the expression */ | |
4837 | mri_comment_end (stop, stopc); | |
4838 | } | |
4839 | } /* equals() */ | |
4840 | ||
4841 | /* .include -- include a file at this point. */ | |
4842 | ||
4843 | /* ARGSUSED */ | |
4844 | void | |
4845 | s_include (arg) | |
4846 | int arg; | |
4847 | { | |
4848 | char *newbuf; | |
4849 | char *filename; | |
4850 | int i; | |
4851 | FILE *try; | |
4852 | char *path; | |
4853 | ||
4854 | if (! flag_m68k_mri) | |
4855 | { | |
4856 | filename = demand_copy_string (&i); | |
4857 | if (filename == NULL) | |
4858 | { | |
4859 | /* demand_copy_string has already printed an error and | |
4860 | called ignore_rest_of_line. */ | |
4861 | return; | |
4862 | } | |
4863 | } | |
4864 | else | |
4865 | { | |
4866 | SKIP_WHITESPACE (); | |
4867 | i = 0; | |
4868 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
4869 | && *input_line_pointer != ' ' | |
4870 | && *input_line_pointer != '\t') | |
4871 | { | |
4872 | obstack_1grow (¬es, *input_line_pointer); | |
4873 | ++input_line_pointer; | |
4874 | ++i; | |
4875 | } | |
4876 | obstack_1grow (¬es, '\0'); | |
4877 | filename = obstack_finish (¬es); | |
4878 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
4879 | ++input_line_pointer; | |
4880 | } | |
4881 | demand_empty_rest_of_line (); | |
4882 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); | |
4883 | for (i = 0; i < include_dir_count; i++) | |
4884 | { | |
4885 | strcpy (path, include_dirs[i]); | |
4886 | strcat (path, "/"); | |
4887 | strcat (path, filename); | |
4888 | if (0 != (try = fopen (path, "r"))) | |
4889 | { | |
4890 | fclose (try); | |
4891 | goto gotit; | |
4892 | } | |
4893 | } | |
4894 | free (path); | |
4895 | path = filename; | |
4896 | gotit: | |
4897 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
4898 | register_dependency (path); | |
4899 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
4900 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
4901 | } /* s_include() */ | |
4902 | ||
4903 | void | |
4904 | add_include_dir (path) | |
4905 | char *path; | |
4906 | { | |
4907 | int i; | |
4908 | ||
4909 | if (include_dir_count == 0) | |
4910 | { | |
4911 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); | |
4912 | include_dirs[0] = "."; /* Current dir */ | |
4913 | include_dir_count = 2; | |
4914 | } | |
4915 | else | |
4916 | { | |
4917 | include_dir_count++; | |
4918 | include_dirs = (char **) realloc (include_dirs, | |
4919 | include_dir_count * sizeof (*include_dirs)); | |
4920 | } | |
4921 | ||
4922 | include_dirs[include_dir_count - 1] = path; /* New one */ | |
4923 | ||
4924 | i = strlen (path); | |
4925 | if (i > include_dir_maxlen) | |
4926 | include_dir_maxlen = i; | |
4927 | } /* add_include_dir() */ | |
4928 | \f | |
4929 | /* Output debugging information to denote the source file. */ | |
4930 | ||
4931 | static void | |
4932 | generate_file_debug () | |
4933 | { | |
4934 | if (debug_type == DEBUG_STABS) | |
4935 | stabs_generate_asm_file (); | |
4936 | } | |
4937 | ||
4938 | /* Output line number debugging information for the current source line. */ | |
4939 | ||
4940 | void | |
4941 | generate_lineno_debug () | |
4942 | { | |
4943 | #ifdef ECOFF_DEBUGGING | |
4944 | /* ECOFF assemblers automatically generate debugging information. | |
4945 | FIXME: This should probably be handled elsewhere. */ | |
4946 | if (debug_type == DEBUG_UNSPECIFIED) | |
4947 | { | |
4948 | if (ECOFF_DEBUGGING && ecoff_no_current_file ()) | |
4949 | debug_type = DEBUG_ECOFF; | |
4950 | else | |
4951 | debug_type = DEBUG_NONE; | |
4952 | } | |
4953 | #endif | |
4954 | ||
4955 | switch (debug_type) | |
4956 | { | |
4957 | case DEBUG_UNSPECIFIED: | |
4958 | case DEBUG_NONE: | |
4959 | break; | |
4960 | case DEBUG_STABS: | |
4961 | stabs_generate_asm_lineno (); | |
4962 | break; | |
4963 | case DEBUG_ECOFF: | |
4964 | ecoff_generate_asm_lineno (); | |
4965 | break; | |
4966 | case DEBUG_DWARF: | |
4967 | case DEBUG_DWARF2: | |
4968 | /* FIXME. */ | |
4969 | break; | |
4970 | } | |
4971 | } | |
4972 | ||
4973 | /* Output debugging information to mark a function entry point or end point. | |
4974 | END_P is zero for .func, and non-zero for .endfunc. */ | |
4975 | ||
4976 | void | |
4977 | s_func (end_p) | |
4978 | int end_p; | |
4979 | { | |
4980 | do_s_func (end_p, NULL); | |
4981 | } | |
4982 | ||
4983 | /* Subroutine of s_func so targets can choose a different default prefix. | |
4984 | If DEFAULT_PREFIX is NULL, use the target's "leading char". */ | |
4985 | ||
4986 | void | |
4987 | do_s_func (end_p, default_prefix) | |
4988 | int end_p; | |
4989 | const char *default_prefix; | |
4990 | { | |
4991 | /* Record the current function so that we can issue an error message for | |
4992 | misplaced .func,.endfunc, and also so that .endfunc needs no | |
4993 | arguments. */ | |
4994 | static char *current_name; | |
4995 | static char *current_label; | |
4996 | ||
4997 | if (end_p) | |
4998 | { | |
4999 | if (current_name == NULL) | |
5000 | { | |
5001 | as_bad (_("missing .func")); | |
5002 | ignore_rest_of_line (); | |
5003 | return; | |
5004 | } | |
5005 | ||
5006 | if (debug_type == DEBUG_STABS) | |
5007 | stabs_generate_asm_endfunc (current_name, current_label); | |
5008 | ||
5009 | current_name = current_label = NULL; | |
5010 | } | |
5011 | else /* ! end_p */ | |
5012 | { | |
5013 | char *name,*label; | |
5014 | char delim1,delim2; | |
5015 | ||
5016 | if (current_name != NULL) | |
5017 | { | |
5018 | as_bad (_(".endfunc missing for previous .func")); | |
5019 | ignore_rest_of_line (); | |
5020 | return; | |
5021 | } | |
5022 | ||
5023 | name = input_line_pointer; | |
5024 | delim1 = get_symbol_end (); | |
5025 | name = xstrdup (name); | |
5026 | *input_line_pointer = delim1; | |
5027 | SKIP_WHITESPACE (); | |
5028 | if (*input_line_pointer != ',') | |
5029 | { | |
5030 | if (default_prefix) | |
5031 | asprintf (&label, "%s%s", default_prefix, name); | |
5032 | else | |
5033 | { | |
5034 | char leading_char = 0; | |
5035 | #ifdef BFD_ASSEMBLER | |
5036 | leading_char = bfd_get_symbol_leading_char (stdoutput); | |
5037 | #endif | |
5038 | /* Missing entry point, use function's name with the leading | |
5039 | char prepended. */ | |
5040 | if (leading_char) | |
5041 | asprintf (&label, "%c%s", leading_char, name); | |
5042 | else | |
5043 | label = name; | |
5044 | } | |
5045 | } | |
5046 | else | |
5047 | { | |
5048 | ++input_line_pointer; | |
5049 | SKIP_WHITESPACE (); | |
5050 | label = input_line_pointer; | |
5051 | delim2 = get_symbol_end (); | |
5052 | label = xstrdup (label); | |
5053 | *input_line_pointer = delim2; | |
5054 | } | |
5055 | ||
5056 | if (debug_type == DEBUG_STABS) | |
5057 | stabs_generate_asm_func (name, label); | |
5058 | ||
5059 | current_name = name; | |
5060 | current_label = label; | |
5061 | } | |
5062 | ||
5063 | demand_empty_rest_of_line (); | |
5064 | } | |
5065 | \f | |
5066 | void | |
5067 | s_ignore (arg) | |
5068 | int arg; | |
5069 | { | |
5070 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
5071 | { | |
5072 | ++input_line_pointer; | |
5073 | } | |
5074 | ++input_line_pointer; | |
5075 | } | |
5076 | ||
5077 | ||
5078 | void | |
5079 | read_print_statistics (file) | |
5080 | FILE *file; | |
5081 | { | |
5082 | hash_print_statistics (file, "pseudo-op table", po_hash); | |
5083 | } | |
5084 | ||
5085 | /* end of read.c */ |