Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* read.c - read a source file - |
fa306131 AM |
2 | Copyright (C) 1986, 87, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, |
3 | 2000 Free Software Foundation, Inc. | |
252b5132 RH |
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 | ||
8684e216 HPN |
56 | /* Set by the object-format or the target. */ |
57 | #ifndef TC_IMPLICIT_LCOMM_ALIGNMENT | |
58 | #define TC_IMPLICIT_LCOMM_ALIGNMENT(SIZE, P2VAR) \ | |
59 | do { \ | |
60 | if ((SIZE) >= 8) \ | |
61 | (P2VAR) = 3; \ | |
62 | else if ((SIZE) >= 4) \ | |
63 | (P2VAR) = 2; \ | |
64 | else if ((SIZE) >= 2) \ | |
65 | (P2VAR) = 1; \ | |
66 | else \ | |
67 | (P2VAR) = 0; \ | |
68 | } while (0) | |
69 | #endif | |
70 | ||
252b5132 RH |
71 | /* The NOP_OPCODE is for the alignment fill value. |
72 | * fill it a nop instruction so that the disassembler does not choke | |
73 | * on it | |
74 | */ | |
75 | #ifndef NOP_OPCODE | |
76 | #define NOP_OPCODE 0x00 | |
77 | #endif | |
78 | ||
79 | char *input_line_pointer; /*->next char of source file to parse. */ | |
80 | ||
81 | #if BITS_PER_CHAR != 8 | |
82 | /* The following table is indexed by[(char)] and will break if | |
83 | a char does not have exactly 256 states (hopefully 0:255!)! */ | |
84 | die horribly; | |
85 | #endif | |
86 | ||
87 | #ifndef LEX_AT | |
88 | /* The m88k unfortunately uses @ as a label beginner. */ | |
89 | #define LEX_AT 0 | |
90 | #endif | |
91 | ||
92 | #ifndef LEX_BR | |
93 | /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ | |
94 | #define LEX_BR 0 | |
95 | #endif | |
96 | ||
97 | #ifndef LEX_PCT | |
98 | /* The Delta 68k assembler permits % inside label names. */ | |
99 | #define LEX_PCT 0 | |
100 | #endif | |
101 | ||
102 | #ifndef LEX_QM | |
103 | /* The PowerPC Windows NT assemblers permits ? inside label names. */ | |
104 | #define LEX_QM 0 | |
105 | #endif | |
106 | ||
58b5739a | 107 | #ifndef LEX_HASH |
800eeca4 JW |
108 | /* The IA-64 assembler uses # as a suffix designating a symbol. We include |
109 | it in the symbol and strip it out in tc_canonicalize_symbol_name. */ | |
58b5739a RH |
110 | #define LEX_HASH 0 |
111 | #endif | |
112 | ||
252b5132 RH |
113 | #ifndef LEX_DOLLAR |
114 | /* The a29k assembler does not permits labels to start with $. */ | |
115 | #define LEX_DOLLAR 3 | |
116 | #endif | |
117 | ||
118 | #ifndef LEX_TILDE | |
119 | /* The Delta 68k assembler permits ~ at start of label names. */ | |
120 | #define LEX_TILDE 0 | |
121 | #endif | |
122 | ||
123 | /* used by is_... macros. our ctype[] */ | |
124 | char lex_type[256] = | |
125 | { | |
126 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
127 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
58b5739a | 128 | 0, 0, 0, LEX_HASH, LEX_DOLLAR, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ |
252b5132 RH |
129 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, LEX_QM, /* 0123456789:;<=>? */ |
130 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ | |
131 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ | |
132 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ | |
133 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, LEX_TILDE, 0, /* pqrstuvwxyz{|}~. */ | |
134 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
135 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
136 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
137 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
138 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
139 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
140 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, | |
141 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 | |
142 | }; | |
143 | ||
144 | ||
145 | /* | |
146 | * In: a character. | |
147 | * Out: 1 if this character ends a line. | |
148 | */ | |
252b5132 RH |
149 | char is_end_of_line[256] = |
150 | { | |
151 | #ifdef CR_EOL | |
b75c0c92 | 152 | 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, /* @abcdefghijklmno */ |
252b5132 | 153 | #else |
b75c0c92 | 154 | 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, /* @abcdefghijklmno */ |
252b5132 | 155 | #endif |
b75c0c92 AM |
156 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ |
157 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* _!"#$%&'()*+,-./ */ | |
969e1a7b | 158 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, /* 0123456789:;<=>? */ |
b75c0c92 AM |
159 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ |
160 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
161 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
162 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
163 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
164 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
165 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
166 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
167 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* */ | |
252b5132 | 168 | }; |
252b5132 RH |
169 | |
170 | /* Functions private to this file. */ | |
171 | ||
172 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
173 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
174 | ||
175 | /* TARGET_BYTES_BIG_ENDIAN is required to be defined to either 0 or 1 in the | |
176 | tc-<CPU>.h file. See the "Porting GAS" section of the internals manual. */ | |
177 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; | |
178 | ||
179 | static char *old_buffer; /* JF a hack */ | |
180 | static char *old_input; | |
181 | static char *old_limit; | |
182 | ||
183 | /* Variables for handling include file directory table. */ | |
184 | ||
185 | char **include_dirs; /* Table of pointers to directories to | |
186 | search for .include's */ | |
187 | int include_dir_count; /* How many are in the table */ | |
188 | int include_dir_maxlen = 1;/* Length of longest in table */ | |
189 | ||
190 | #ifndef WORKING_DOT_WORD | |
191 | struct broken_word *broken_words; | |
192 | int new_broken_words; | |
193 | #endif | |
194 | ||
195 | /* The current offset into the absolute section. We don't try to | |
196 | build frags in the absolute section, since no data can be stored | |
197 | there. We just keep track of the current offset. */ | |
198 | addressT abs_section_offset; | |
199 | ||
200 | /* If this line had an MRI style label, it is stored in this variable. | |
201 | This is used by some of the MRI pseudo-ops. */ | |
202 | symbolS *line_label; | |
203 | ||
204 | /* This global variable is used to support MRI common sections. We | |
205 | translate such sections into a common symbol. This variable is | |
206 | non-NULL when we are in an MRI common section. */ | |
207 | symbolS *mri_common_symbol; | |
208 | ||
209 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we | |
210 | need to align to an even byte boundary unless the next pseudo-op is | |
211 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment | |
212 | may be needed. */ | |
213 | static int mri_pending_align; | |
214 | ||
215 | #ifndef NO_LISTING | |
216 | #ifdef OBJ_ELF | |
217 | /* This variable is set to be non-zero if the next string we see might | |
218 | be the name of the source file in DWARF debugging information. See | |
219 | the comment in emit_expr for the format we look for. */ | |
220 | static int dwarf_file_string; | |
221 | #endif | |
222 | #endif | |
223 | ||
224 | static void cons_worker PARAMS ((int, int)); | |
2b47531b | 225 | static int scrub_from_string PARAMS ((char *, int)); |
252b5132 RH |
226 | static void do_align PARAMS ((int, char *, int, int)); |
227 | static void s_align PARAMS ((int, int)); | |
6d4d30bb | 228 | static void s_lcomm_internal PARAMS ((int, int)); |
252b5132 | 229 | static int hex_float PARAMS ((int, char *)); |
6d4d30bb AM |
230 | static inline int sizeof_sleb128 PARAMS ((offsetT)); |
231 | static inline int sizeof_uleb128 PARAMS ((valueT)); | |
232 | static inline int output_sleb128 PARAMS ((char *, offsetT)); | |
233 | static inline int output_uleb128 PARAMS ((char *, valueT)); | |
234 | static inline int output_big_sleb128 PARAMS ((char *, LITTLENUM_TYPE *, int)); | |
235 | static inline int output_big_uleb128 PARAMS ((char *, LITTLENUM_TYPE *, int)); | |
236 | static int output_big_leb128 PARAMS ((char *, LITTLENUM_TYPE *, int, int)); | |
252b5132 RH |
237 | static void do_org PARAMS ((segT, expressionS *, int)); |
238 | char *demand_copy_string PARAMS ((int *lenP)); | |
239 | static segT get_segmented_expression PARAMS ((expressionS *expP)); | |
240 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); | |
241 | static void pobegin PARAMS ((void)); | |
242 | static int get_line_sb PARAMS ((sb *)); | |
243 | static void generate_file_debug PARAMS ((void)); | |
244 | \f | |
245 | ||
246 | void | |
247 | read_begin () | |
248 | { | |
249 | const char *p; | |
250 | ||
251 | pobegin (); | |
252 | obj_read_begin_hook (); | |
253 | ||
254 | /* Something close -- but not too close -- to a multiple of 1024. | |
255 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
256 | obstack_begin (¬es, chunksize); | |
257 | obstack_begin (&cond_obstack, chunksize); | |
258 | ||
259 | /* Use machine dependent syntax */ | |
260 | for (p = line_separator_chars; *p; p++) | |
261 | is_end_of_line[(unsigned char) *p] = 1; | |
262 | /* Use more. FIXME-SOMEDAY. */ | |
263 | ||
264 | if (flag_mri) | |
265 | lex_type['?'] = 3; | |
266 | } | |
267 | \f | |
268 | /* set up pseudo-op tables */ | |
269 | ||
270 | static struct hash_control *po_hash; | |
271 | ||
272 | static const pseudo_typeS potable[] = | |
273 | { | |
274 | {"abort", s_abort, 0}, | |
275 | {"align", s_align_ptwo, 0}, | |
276 | {"ascii", stringer, 0}, | |
277 | {"asciz", stringer, 1}, | |
278 | {"balign", s_align_bytes, 0}, | |
279 | {"balignw", s_align_bytes, -2}, | |
280 | {"balignl", s_align_bytes, -4}, | |
281 | /* block */ | |
282 | {"byte", cons, 1}, | |
283 | {"comm", s_comm, 0}, | |
284 | {"common", s_mri_common, 0}, | |
285 | {"common.s", s_mri_common, 1}, | |
286 | {"data", s_data, 0}, | |
287 | {"dc", cons, 2}, | |
288 | {"dc.b", cons, 1}, | |
289 | {"dc.d", float_cons, 'd'}, | |
290 | {"dc.l", cons, 4}, | |
291 | {"dc.s", float_cons, 'f'}, | |
292 | {"dc.w", cons, 2}, | |
293 | {"dc.x", float_cons, 'x'}, | |
294 | {"dcb", s_space, 2}, | |
295 | {"dcb.b", s_space, 1}, | |
296 | {"dcb.d", s_float_space, 'd'}, | |
297 | {"dcb.l", s_space, 4}, | |
298 | {"dcb.s", s_float_space, 'f'}, | |
299 | {"dcb.w", s_space, 2}, | |
300 | {"dcb.x", s_float_space, 'x'}, | |
301 | {"ds", s_space, 2}, | |
302 | {"ds.b", s_space, 1}, | |
303 | {"ds.d", s_space, 8}, | |
304 | {"ds.l", s_space, 4}, | |
305 | {"ds.p", s_space, 12}, | |
306 | {"ds.s", s_space, 4}, | |
307 | {"ds.w", s_space, 2}, | |
308 | {"ds.x", s_space, 12}, | |
309 | {"debug", s_ignore, 0}, | |
310 | #ifdef S_SET_DESC | |
311 | {"desc", s_desc, 0}, | |
312 | #endif | |
313 | /* dim */ | |
314 | {"double", float_cons, 'd'}, | |
315 | /* dsect */ | |
316 | {"eject", listing_eject, 0}, /* Formfeed listing */ | |
317 | {"else", s_else, 0}, | |
318 | {"elsec", s_else, 0}, | |
3fd9f047 | 319 | {"elseif", s_elseif, (int) O_ne}, |
252b5132 RH |
320 | {"end", s_end, 0}, |
321 | {"endc", s_endif, 0}, | |
322 | {"endfunc", s_func, 1}, | |
323 | {"endif", s_endif, 0}, | |
324 | /* endef */ | |
325 | {"equ", s_set, 0}, | |
326 | {"equiv", s_set, 1}, | |
327 | {"err", s_err, 0}, | |
328 | {"exitm", s_mexit, 0}, | |
329 | /* extend */ | |
330 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ | |
331 | {"appfile", s_app_file, 1}, | |
332 | {"appline", s_app_line, 0}, | |
333 | {"fail", s_fail, 0}, | |
334 | {"file", s_app_file, 0}, | |
335 | {"fill", s_fill, 0}, | |
336 | {"float", float_cons, 'f'}, | |
337 | {"format", s_ignore, 0}, | |
338 | {"func", s_func, 0}, | |
339 | {"global", s_globl, 0}, | |
340 | {"globl", s_globl, 0}, | |
341 | {"hword", cons, 2}, | |
342 | {"if", s_if, (int) O_ne}, | |
343 | {"ifc", s_ifc, 0}, | |
344 | {"ifdef", s_ifdef, 0}, | |
345 | {"ifeq", s_if, (int) O_eq}, | |
346 | {"ifeqs", s_ifeqs, 0}, | |
347 | {"ifge", s_if, (int) O_ge}, | |
348 | {"ifgt", s_if, (int) O_gt}, | |
349 | {"ifle", s_if, (int) O_le}, | |
350 | {"iflt", s_if, (int) O_lt}, | |
351 | {"ifnc", s_ifc, 1}, | |
352 | {"ifndef", s_ifdef, 1}, | |
353 | {"ifne", s_if, (int) O_ne}, | |
354 | {"ifnes", s_ifeqs, 1}, | |
355 | {"ifnotdef", s_ifdef, 1}, | |
356 | {"include", s_include, 0}, | |
357 | {"int", cons, 4}, | |
358 | {"irp", s_irp, 0}, | |
359 | {"irep", s_irp, 0}, | |
360 | {"irpc", s_irp, 1}, | |
361 | {"irepc", s_irp, 1}, | |
362 | {"lcomm", s_lcomm, 0}, | |
363 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
364 | {"linkonce", s_linkonce, 0}, | |
365 | {"list", listing_list, 1}, /* Turn listing on */ | |
366 | {"llen", listing_psize, 1}, | |
367 | {"long", cons, 4}, | |
368 | {"lsym", s_lsym, 0}, | |
369 | {"macro", s_macro, 0}, | |
370 | {"mexit", s_mexit, 0}, | |
371 | {"mri", s_mri, 0}, | |
372 | {".mri", s_mri, 0}, /* Special case so .mri works in MRI mode. */ | |
373 | {"name", s_ignore, 0}, | |
374 | {"noformat", s_ignore, 0}, | |
375 | {"nolist", listing_list, 0}, /* Turn listing off */ | |
376 | {"nopage", listing_nopage, 0}, | |
377 | {"octa", cons, 16}, | |
378 | {"offset", s_struct, 0}, | |
379 | {"org", s_org, 0}, | |
380 | {"p2align", s_align_ptwo, 0}, | |
381 | {"p2alignw", s_align_ptwo, -2}, | |
382 | {"p2alignl", s_align_ptwo, -4}, | |
383 | {"page", listing_eject, 0}, | |
384 | {"plen", listing_psize, 0}, | |
385 | {"print", s_print, 0}, | |
386 | {"psize", listing_psize, 0}, /* set paper size */ | |
387 | {"purgem", s_purgem, 0}, | |
388 | {"quad", cons, 8}, | |
389 | {"rep", s_rept, 0}, | |
390 | {"rept", s_rept, 0}, | |
391 | {"rva", s_rva, 4}, | |
392 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ | |
393 | /* scl */ | |
394 | /* sect */ | |
395 | {"set", s_set, 0}, | |
396 | {"short", cons, 2}, | |
397 | {"single", float_cons, 'f'}, | |
398 | /* size */ | |
399 | {"space", s_space, 0}, | |
400 | {"skip", s_space, 0}, | |
401 | {"sleb128", s_leb128, 1}, | |
402 | {"spc", s_ignore, 0}, | |
403 | {"stabd", s_stab, 'd'}, | |
404 | {"stabn", s_stab, 'n'}, | |
405 | {"stabs", s_stab, 's'}, | |
406 | {"string", stringer, 1}, | |
407 | {"struct", s_struct, 0}, | |
408 | /* tag */ | |
409 | {"text", s_text, 0}, | |
410 | ||
411 | /* This is for gcc to use. It's only just been added (2/94), so gcc | |
412 | won't be able to use it for a while -- probably a year or more. | |
413 | But once this has been released, check with gcc maintainers | |
414 | before deleting it or even changing the spelling. */ | |
415 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, | |
416 | /* If we're folding case -- done for some targets, not necessarily | |
417 | all -- the above string in an input file will be converted to | |
418 | this one. Match it either way... */ | |
419 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, | |
420 | ||
421 | {"title", listing_title, 0}, /* Listing title */ | |
422 | {"ttl", listing_title, 0}, | |
423 | /* type */ | |
424 | {"uleb128", s_leb128, 0}, | |
425 | /* use */ | |
426 | /* val */ | |
427 | {"xcom", s_comm, 0}, | |
428 | {"xdef", s_globl, 0}, | |
429 | {"xref", s_ignore, 0}, | |
430 | {"xstabs", s_xstab, 's'}, | |
431 | {"word", cons, 2}, | |
432 | {"zero", s_space, 0}, | |
ab9da554 | 433 | {NULL, NULL, 0} /* end sentinel */ |
252b5132 RH |
434 | }; |
435 | ||
436 | static int pop_override_ok = 0; | |
437 | static const char *pop_table_name; | |
438 | ||
439 | void | |
440 | pop_insert (table) | |
441 | const pseudo_typeS *table; | |
442 | { | |
443 | const char *errtxt; | |
444 | const pseudo_typeS *pop; | |
445 | for (pop = table; pop->poc_name; pop++) | |
446 | { | |
447 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
448 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) | |
449 | as_fatal (_("error constructing %s pseudo-op table: %s"), pop_table_name, | |
450 | errtxt); | |
451 | } | |
452 | } | |
453 | ||
454 | #ifndef md_pop_insert | |
455 | #define md_pop_insert() pop_insert(md_pseudo_table) | |
456 | #endif | |
457 | ||
458 | #ifndef obj_pop_insert | |
459 | #define obj_pop_insert() pop_insert(obj_pseudo_table) | |
460 | #endif | |
461 | ||
462 | static void | |
463 | pobegin () | |
464 | { | |
465 | po_hash = hash_new (); | |
466 | ||
467 | /* Do the target-specific pseudo ops. */ | |
468 | pop_table_name = "md"; | |
469 | md_pop_insert (); | |
470 | ||
471 | /* Now object specific. Skip any that were in the target table. */ | |
472 | pop_table_name = "obj"; | |
473 | pop_override_ok = 1; | |
474 | obj_pop_insert (); | |
475 | ||
476 | /* Now portable ones. Skip any that we've seen already. */ | |
477 | pop_table_name = "standard"; | |
478 | pop_insert (potable); | |
479 | } | |
480 | \f | |
481 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ | |
482 | if (ignore_input ()) \ | |
483 | { \ | |
484 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
485 | if (input_line_pointer == buffer_limit) \ | |
486 | break; \ | |
487 | continue; \ | |
488 | } | |
489 | ||
490 | ||
491 | /* This function is used when scrubbing the characters between #APP | |
492 | and #NO_APP. */ | |
493 | ||
494 | static char *scrub_string; | |
495 | static char *scrub_string_end; | |
496 | ||
497 | static int | |
2b47531b ILT |
498 | scrub_from_string (buf, buflen) |
499 | char *buf; | |
500 | int buflen; | |
252b5132 | 501 | { |
2b47531b ILT |
502 | int copy; |
503 | ||
504 | copy = scrub_string_end - scrub_string; | |
505 | if (copy > buflen) | |
506 | copy = buflen; | |
507 | memcpy (buf, scrub_string, copy); | |
508 | scrub_string += copy; | |
509 | return copy; | |
252b5132 RH |
510 | } |
511 | ||
512 | /* read_a_source_file() | |
513 | * | |
514 | * We read the file, putting things into a web that | |
515 | * represents what we have been reading. | |
516 | */ | |
517 | void | |
518 | read_a_source_file (name) | |
519 | char *name; | |
520 | { | |
521 | register char c; | |
522 | register char *s; /* string of symbol, '\0' appended */ | |
523 | register int temp; | |
524 | pseudo_typeS *pop; | |
525 | ||
526 | buffer = input_scrub_new_file (name); | |
527 | ||
528 | listing_file (name); | |
529 | listing_newline (NULL); | |
530 | register_dependency (name); | |
531 | ||
532 | /* Generate debugging information before we've read anything in to denote | |
533 | this file as the "main" source file and not a subordinate one | |
534 | (e.g. N_SO vs N_SOL in stabs). */ | |
535 | generate_file_debug (); | |
536 | ||
537 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) | |
538 | { /* We have another line to parse. */ | |
539 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
540 | contin: /* JF this goto is my fault I admit it. | |
541 | Someone brave please re-write the whole | |
542 | input section here? Pleeze??? */ | |
543 | while (input_line_pointer < buffer_limit) | |
544 | { | |
545 | /* We have more of this buffer to parse. */ | |
546 | ||
547 | /* | |
548 | * We now have input_line_pointer->1st char of next line. | |
549 | * If input_line_pointer [-1] == '\n' then we just | |
550 | * scanned another line: so bump line counters. | |
551 | */ | |
552 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) | |
553 | { | |
554 | #ifdef md_start_line_hook | |
555 | md_start_line_hook (); | |
556 | #endif | |
557 | ||
558 | if (input_line_pointer[-1] == '\n') | |
559 | bump_line_counters (); | |
560 | ||
561 | line_label = NULL; | |
562 | ||
abd63a32 | 563 | if (LABELS_WITHOUT_COLONS || flag_m68k_mri) |
252b5132 RH |
564 | { |
565 | /* Text at the start of a line must be a label, we | |
566 | run down and stick a colon in. */ | |
567 | if (is_name_beginner (*input_line_pointer)) | |
568 | { | |
569 | char *line_start = input_line_pointer; | |
570 | char c; | |
571 | int mri_line_macro; | |
572 | ||
573 | LISTING_NEWLINE (); | |
574 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
575 | ||
576 | c = get_symbol_end (); | |
577 | ||
578 | /* In MRI mode, the EQU and MACRO pseudoops must | |
579 | be handled specially. */ | |
580 | mri_line_macro = 0; | |
581 | if (flag_m68k_mri) | |
582 | { | |
583 | char *rest = input_line_pointer + 1; | |
584 | ||
585 | if (*rest == ':') | |
586 | ++rest; | |
587 | if (*rest == ' ' || *rest == '\t') | |
588 | ++rest; | |
589 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
590 | || strncasecmp (rest, "SET", 3) == 0) | |
591 | && (rest[3] == ' ' || rest[3] == '\t')) | |
592 | { | |
593 | input_line_pointer = rest + 3; | |
594 | equals (line_start, | |
595 | strncasecmp (rest, "SET", 3) == 0); | |
596 | continue; | |
597 | } | |
598 | if (strncasecmp (rest, "MACRO", 5) == 0 | |
599 | && (rest[5] == ' ' | |
600 | || rest[5] == '\t' | |
601 | || is_end_of_line[(unsigned char) rest[5]])) | |
602 | mri_line_macro = 1; | |
603 | } | |
604 | ||
605 | /* In MRI mode, we need to handle the MACRO | |
606 | pseudo-op specially: we don't want to put the | |
607 | symbol in the symbol table. */ | |
a25c045a TW |
608 | if (! mri_line_macro |
609 | #ifdef TC_START_LABEL_WITHOUT_COLON | |
610 | && TC_START_LABEL_WITHOUT_COLON(c, | |
611 | input_line_pointer) | |
612 | #endif | |
613 | ) | |
252b5132 RH |
614 | line_label = colon (line_start); |
615 | else | |
616 | line_label = symbol_create (line_start, | |
617 | absolute_section, | |
618 | (valueT) 0, | |
619 | &zero_address_frag); | |
620 | ||
621 | *input_line_pointer = c; | |
622 | if (c == ':') | |
623 | input_line_pointer++; | |
624 | } | |
625 | } | |
626 | } | |
627 | ||
628 | /* | |
629 | * We are at the begining of a line, or similar place. | |
630 | * We expect a well-formed assembler statement. | |
631 | * A "symbol-name:" is a statement. | |
632 | * | |
633 | * Depending on what compiler is used, the order of these tests | |
634 | * may vary to catch most common case 1st. | |
635 | * Each test is independent of all other tests at the (top) level. | |
636 | * PLEASE make a compiler that doesn't use this assembler. | |
637 | * It is crufty to waste a compiler's time encoding things for this | |
638 | * assembler, which then wastes more time decoding it. | |
639 | * (And communicating via (linear) files is silly! | |
640 | * If you must pass stuff, please pass a tree!) | |
641 | */ | |
642 | if ((c = *input_line_pointer++) == '\t' | |
643 | || c == ' ' | |
644 | || c == '\f' | |
645 | || c == 0) | |
646 | { | |
647 | c = *input_line_pointer++; | |
648 | } | |
649 | know (c != ' '); /* No further leading whitespace. */ | |
650 | ||
651 | #ifndef NO_LISTING | |
652 | /* If listing is on, and we are expanding a macro, then give | |
653 | the listing code the contents of the expanded line. */ | |
654 | if (listing) | |
655 | { | |
656 | if ((listing & LISTING_MACEXP) && macro_nest > 0) | |
657 | { | |
658 | char *copy; | |
659 | int len; | |
660 | ||
661 | /* Find the end of the current expanded macro line. */ | |
662 | for (s = input_line_pointer-1; *s ; ++s) | |
663 | if (is_end_of_line[(unsigned char) *s]) | |
664 | break; | |
665 | ||
666 | /* Copy it for safe keeping. Also give an indication of | |
667 | how much macro nesting is involved at this point. */ | |
668 | len = s - (input_line_pointer-1); | |
669 | copy = (char *) xmalloc (len + macro_nest + 2); | |
670 | memset (copy, '>', macro_nest); | |
671 | copy[macro_nest] = ' '; | |
672 | memcpy (copy + macro_nest + 1, input_line_pointer-1, len); | |
673 | copy[macro_nest+1+len] = '\0'; | |
674 | ||
675 | /* Install the line with the listing facility. */ | |
676 | listing_newline (copy); | |
677 | } | |
678 | else | |
679 | listing_newline (NULL); | |
680 | } | |
681 | #endif | |
682 | ||
683 | /* | |
684 | * C is the 1st significant character. | |
685 | * Input_line_pointer points after that character. | |
686 | */ | |
687 | if (is_name_beginner (c)) | |
688 | { | |
689 | /* want user-defined label or pseudo/opcode */ | |
690 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
691 | ||
692 | s = --input_line_pointer; | |
693 | c = get_symbol_end (); /* name's delimiter */ | |
694 | /* | |
695 | * C is character after symbol. | |
696 | * That character's place in the input line is now '\0'. | |
697 | * S points to the beginning of the symbol. | |
698 | * [In case of pseudo-op, s->'.'.] | |
699 | * Input_line_pointer->'\0' where c was. | |
700 | */ | |
701 | if (TC_START_LABEL(c, input_line_pointer)) | |
702 | { | |
703 | if (flag_m68k_mri) | |
704 | { | |
705 | char *rest = input_line_pointer + 1; | |
706 | ||
707 | /* In MRI mode, \tsym: set 0 is permitted. */ | |
708 | ||
709 | if (*rest == ':') | |
710 | ++rest; | |
711 | if (*rest == ' ' || *rest == '\t') | |
712 | ++rest; | |
713 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
714 | || strncasecmp (rest, "SET", 3) == 0) | |
715 | && (rest[3] == ' ' || rest[3] == '\t')) | |
716 | { | |
717 | input_line_pointer = rest + 3; | |
718 | equals (s, 1); | |
719 | continue; | |
720 | } | |
721 | } | |
722 | ||
723 | line_label = colon (s); /* user-defined label */ | |
724 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ | |
725 | /* Input_line_pointer->after ':'. */ | |
726 | SKIP_WHITESPACE (); | |
727 | ||
728 | ||
729 | } | |
730 | else if (c == '=' | |
731 | || ((c == ' ' || c == '\t') | |
732 | && input_line_pointer[1] == '=' | |
733 | #ifdef TC_EQUAL_IN_INSN | |
734 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
735 | #endif | |
736 | )) | |
737 | { | |
738 | equals (s, 1); | |
739 | demand_empty_rest_of_line (); | |
740 | } | |
741 | else | |
742 | { /* expect pseudo-op or machine instruction */ | |
743 | pop = NULL; | |
744 | ||
745 | #define IGNORE_OPCODE_CASE | |
746 | #ifdef IGNORE_OPCODE_CASE | |
747 | { | |
748 | char *s2 = s; | |
749 | while (*s2) | |
750 | { | |
751 | if (isupper ((unsigned char) *s2)) | |
752 | *s2 = tolower (*s2); | |
753 | s2++; | |
754 | } | |
755 | } | |
756 | #endif | |
757 | ||
abd63a32 | 758 | if (NO_PSEUDO_DOT || flag_m68k_mri) |
252b5132 RH |
759 | { |
760 | /* The MRI assembler and the m88k use pseudo-ops | |
761 | without a period. */ | |
762 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
763 | if (pop != NULL && pop->poc_handler == NULL) | |
764 | pop = NULL; | |
765 | } | |
766 | ||
767 | if (pop != NULL | |
768 | || (! flag_m68k_mri && *s == '.')) | |
769 | { | |
770 | /* | |
771 | * PSEUDO - OP. | |
772 | * | |
773 | * WARNING: c has next char, which may be end-of-line. | |
774 | * We lookup the pseudo-op table with s+1 because we | |
775 | * already know that the pseudo-op begins with a '.'. | |
776 | */ | |
777 | ||
778 | if (pop == NULL) | |
779 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
780 | ||
781 | /* In MRI mode, we may need to insert an | |
782 | automatic alignment directive. What a hack | |
783 | this is. */ | |
784 | if (mri_pending_align | |
785 | && (pop == NULL | |
786 | || ! ((pop->poc_handler == cons | |
787 | && pop->poc_val == 1) | |
788 | || (pop->poc_handler == s_space | |
789 | && pop->poc_val == 1) | |
790 | #ifdef tc_conditional_pseudoop | |
791 | || tc_conditional_pseudoop (pop) | |
792 | #endif | |
793 | || pop->poc_handler == s_if | |
794 | || pop->poc_handler == s_ifdef | |
795 | || pop->poc_handler == s_ifc | |
796 | || pop->poc_handler == s_ifeqs | |
797 | || pop->poc_handler == s_else | |
798 | || pop->poc_handler == s_endif | |
799 | || pop->poc_handler == s_globl | |
800 | || pop->poc_handler == s_ignore))) | |
801 | { | |
802 | do_align (1, (char *) NULL, 0, 0); | |
803 | mri_pending_align = 0; | |
804 | if (line_label != NULL) | |
805 | { | |
2b47531b | 806 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
807 | S_SET_VALUE (line_label, frag_now_fix ()); |
808 | } | |
809 | } | |
810 | ||
811 | /* Print the error msg now, while we still can */ | |
812 | if (pop == NULL) | |
813 | { | |
814 | as_bad (_("Unknown pseudo-op: `%s'"), s); | |
815 | *input_line_pointer = c; | |
816 | s_ignore (0); | |
817 | continue; | |
818 | } | |
819 | ||
820 | /* Put it back for error messages etc. */ | |
821 | *input_line_pointer = c; | |
822 | /* The following skip of whitespace is compulsory. | |
823 | A well shaped space is sometimes all that separates | |
824 | keyword from operands. */ | |
825 | if (c == ' ' || c == '\t') | |
826 | input_line_pointer++; | |
827 | /* | |
828 | * Input_line is restored. | |
829 | * Input_line_pointer->1st non-blank char | |
830 | * after pseudo-operation. | |
831 | */ | |
832 | (*pop->poc_handler) (pop->poc_val); | |
833 | ||
834 | /* If that was .end, just get out now. */ | |
835 | if (pop->poc_handler == s_end) | |
836 | goto quit; | |
837 | } | |
838 | else | |
839 | { | |
1bf67e0d ILT |
840 | int inquote = 0; |
841 | #ifdef QUOTES_IN_INSN | |
842 | int inescape = 0; | |
843 | #endif | |
252b5132 RH |
844 | |
845 | /* WARNING: c has char, which may be end-of-line. */ | |
846 | /* Also: input_line_pointer->`\0` where c was. */ | |
847 | *input_line_pointer = c; | |
848 | while (!is_end_of_line[(unsigned char) *input_line_pointer] | |
849 | || inquote | |
850 | #ifdef TC_EOL_IN_INSN | |
851 | || TC_EOL_IN_INSN (input_line_pointer) | |
852 | #endif | |
853 | ) | |
854 | { | |
855 | if (flag_m68k_mri && *input_line_pointer == '\'') | |
856 | inquote = ! inquote; | |
1c32af22 RH |
857 | #ifdef QUOTES_IN_INSN |
858 | if (inescape) | |
859 | inescape = 0; | |
860 | else if (*input_line_pointer == '"') | |
861 | inquote = ! inquote; | |
862 | else if (*input_line_pointer == '\\') | |
863 | inescape = 1; | |
864 | #endif | |
252b5132 RH |
865 | input_line_pointer++; |
866 | } | |
867 | ||
868 | c = *input_line_pointer; | |
869 | *input_line_pointer = '\0'; | |
870 | ||
871 | generate_lineno_debug (); | |
872 | ||
873 | if (macro_defined) | |
874 | { | |
875 | sb out; | |
876 | const char *err; | |
9f10757c | 877 | macro_entry *macro; |
252b5132 | 878 | |
9f10757c | 879 | if (check_macro (s, &out, '\0', &err, ¯o)) |
252b5132 RH |
880 | { |
881 | if (err != NULL) | |
4c63da97 | 882 | as_bad ("%s", err); |
252b5132 RH |
883 | *input_line_pointer++ = c; |
884 | input_scrub_include_sb (&out, | |
9f10757c | 885 | input_line_pointer, 1); |
252b5132 RH |
886 | sb_kill (&out); |
887 | buffer_limit = | |
888 | input_scrub_next_buffer (&input_line_pointer); | |
9f10757c TW |
889 | #ifdef md_macro_info |
890 | md_macro_info (macro); | |
891 | #endif | |
252b5132 RH |
892 | continue; |
893 | } | |
894 | } | |
895 | ||
896 | if (mri_pending_align) | |
897 | { | |
898 | do_align (1, (char *) NULL, 0, 0); | |
899 | mri_pending_align = 0; | |
900 | if (line_label != NULL) | |
901 | { | |
2b47531b | 902 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
903 | S_SET_VALUE (line_label, frag_now_fix ()); |
904 | } | |
905 | } | |
906 | ||
907 | md_assemble (s); /* Assemble 1 instruction. */ | |
908 | ||
909 | *input_line_pointer++ = c; | |
910 | ||
911 | /* We resume loop AFTER the end-of-line from | |
912 | this instruction. */ | |
913 | } /* if (*s=='.') */ | |
914 | } /* if c==':' */ | |
915 | continue; | |
916 | } /* if (is_name_beginner(c) */ | |
917 | ||
918 | ||
919 | /* Empty statement? */ | |
920 | if (is_end_of_line[(unsigned char) c]) | |
921 | continue; | |
922 | ||
923 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) | |
924 | && isdigit ((unsigned char) c)) | |
925 | { | |
926 | /* local label ("4:") */ | |
927 | char *backup = input_line_pointer; | |
928 | ||
929 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
930 | ||
931 | temp = c - '0'; | |
932 | ||
933 | while (isdigit ((unsigned char) *input_line_pointer)) | |
934 | { | |
935 | temp = (temp * 10) + *input_line_pointer - '0'; | |
936 | ++input_line_pointer; | |
937 | } /* read the whole number */ | |
938 | ||
939 | if (LOCAL_LABELS_DOLLAR | |
940 | && *input_line_pointer == '$' | |
941 | && *(input_line_pointer + 1) == ':') | |
942 | { | |
943 | input_line_pointer += 2; | |
944 | ||
945 | if (dollar_label_defined (temp)) | |
946 | { | |
947 | as_fatal (_("label \"%d$\" redefined"), temp); | |
948 | } | |
949 | ||
950 | define_dollar_label (temp); | |
951 | colon (dollar_label_name (temp, 0)); | |
952 | continue; | |
953 | } | |
954 | ||
955 | if (LOCAL_LABELS_FB | |
956 | && *input_line_pointer++ == ':') | |
957 | { | |
958 | fb_label_instance_inc (temp); | |
959 | colon (fb_label_name (temp, 0)); | |
960 | continue; | |
961 | } | |
962 | ||
963 | input_line_pointer = backup; | |
964 | } /* local label ("4:") */ | |
965 | ||
966 | if (c && strchr (line_comment_chars, c)) | |
967 | { /* Its a comment. Better say APP or NO_APP */ | |
968 | char *ends; | |
969 | char *new_buf; | |
970 | char *new_tmp; | |
971 | unsigned int new_length; | |
972 | char *tmp_buf = 0; | |
973 | ||
974 | bump_line_counters (); | |
975 | s = input_line_pointer; | |
976 | if (strncmp (s, "APP\n", 4)) | |
977 | continue; /* We ignore it */ | |
978 | s += 4; | |
979 | ||
980 | ends = strstr (s, "#NO_APP\n"); | |
981 | ||
982 | if (!ends) | |
983 | { | |
984 | unsigned int tmp_len; | |
985 | unsigned int num; | |
986 | ||
987 | /* The end of the #APP wasn't in this buffer. We | |
988 | keep reading in buffers until we find the #NO_APP | |
989 | that goes with this #APP There is one. The specs | |
990 | guarentee it. . . */ | |
991 | tmp_len = buffer_limit - s; | |
992 | tmp_buf = xmalloc (tmp_len + 1); | |
993 | memcpy (tmp_buf, s, tmp_len); | |
994 | do | |
995 | { | |
996 | new_tmp = input_scrub_next_buffer (&buffer); | |
997 | if (!new_tmp) | |
998 | break; | |
999 | else | |
1000 | buffer_limit = new_tmp; | |
1001 | input_line_pointer = buffer; | |
1002 | ends = strstr (buffer, "#NO_APP\n"); | |
1003 | if (ends) | |
1004 | num = ends - buffer; | |
1005 | else | |
1006 | num = buffer_limit - buffer; | |
1007 | ||
1008 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
1009 | memcpy (tmp_buf + tmp_len, buffer, num); | |
1010 | tmp_len += num; | |
1011 | } | |
1012 | while (!ends); | |
1013 | ||
1014 | input_line_pointer = ends ? ends + 8 : NULL; | |
1015 | ||
1016 | s = tmp_buf; | |
1017 | ends = s + tmp_len; | |
1018 | ||
1019 | } | |
1020 | else | |
1021 | { | |
1022 | input_line_pointer = ends + 8; | |
1023 | } | |
1024 | ||
1025 | scrub_string = s; | |
1026 | scrub_string_end = ends; | |
1027 | ||
1028 | new_length = ends - s; | |
1029 | new_buf = (char *) xmalloc (new_length); | |
1030 | new_tmp = new_buf; | |
1031 | for (;;) | |
1032 | { | |
1033 | int space; | |
1034 | int size; | |
1035 | ||
1036 | space = (new_buf + new_length) - new_tmp; | |
1037 | size = do_scrub_chars (scrub_from_string, new_tmp, space); | |
1038 | ||
1039 | if (size < space) | |
1040 | { | |
1041 | new_tmp += size; | |
1042 | break; | |
1043 | } | |
1044 | ||
1045 | new_buf = xrealloc (new_buf, new_length + 100); | |
1046 | new_tmp = new_buf + new_length; | |
1047 | new_length += 100; | |
1048 | } | |
1049 | ||
1050 | if (tmp_buf) | |
1051 | free (tmp_buf); | |
1052 | old_buffer = buffer; | |
1053 | old_input = input_line_pointer; | |
1054 | old_limit = buffer_limit; | |
1055 | buffer = new_buf; | |
1056 | input_line_pointer = new_buf; | |
1057 | buffer_limit = new_tmp; | |
1058 | continue; | |
1059 | } | |
1060 | ||
1061 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
1062 | ||
1063 | #ifdef tc_unrecognized_line | |
1064 | if (tc_unrecognized_line (c)) | |
1065 | continue; | |
1066 | #endif | |
1067 | ||
1068 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
1069 | input_line_pointer--; /* Report unknown char as ignored. */ | |
1070 | ignore_rest_of_line (); | |
1071 | } /* while (input_line_pointer<buffer_limit) */ | |
1072 | ||
1073 | #ifdef md_after_pass_hook | |
1074 | md_after_pass_hook (); | |
1075 | #endif | |
1076 | ||
1077 | if (old_buffer) | |
1078 | { | |
1079 | free (buffer); | |
1080 | bump_line_counters (); | |
1081 | if (old_input != 0) | |
1082 | { | |
1083 | buffer = old_buffer; | |
1084 | input_line_pointer = old_input; | |
1085 | buffer_limit = old_limit; | |
1086 | old_buffer = 0; | |
1087 | goto contin; | |
1088 | } | |
1089 | } | |
1090 | } /* while (more buffers to scan) */ | |
1091 | ||
1092 | quit: | |
1093 | ||
1094 | #ifdef md_cleanup | |
1095 | md_cleanup(); | |
1096 | #endif | |
1097 | input_scrub_close (); /* Close the input file */ | |
1098 | } | |
1099 | ||
1100 | /* For most MRI pseudo-ops, the line actually ends at the first | |
1101 | nonquoted space. This function looks for that point, stuffs a null | |
1102 | in, and sets *STOPCP to the character that used to be there, and | |
1103 | returns the location. | |
1104 | ||
1105 | Until I hear otherwise, I am going to assume that this is only true | |
1106 | for the m68k MRI assembler. */ | |
1107 | ||
1108 | char * | |
1109 | mri_comment_field (stopcp) | |
1110 | char *stopcp; | |
1111 | { | |
1112 | #ifdef TC_M68K | |
1113 | ||
1114 | char *s; | |
1115 | int inquote = 0; | |
1116 | ||
1117 | know (flag_m68k_mri); | |
1118 | ||
1119 | for (s = input_line_pointer; | |
1120 | ((! is_end_of_line[(unsigned char) *s] && *s != ' ' && *s != '\t') | |
1121 | || inquote); | |
1122 | s++) | |
1123 | { | |
1124 | if (*s == '\'') | |
1125 | inquote = ! inquote; | |
1126 | } | |
1127 | *stopcp = *s; | |
1128 | *s = '\0'; | |
1129 | return s; | |
1130 | ||
1131 | #else | |
1132 | ||
1133 | char *s; | |
1134 | ||
1135 | for (s = input_line_pointer; ! is_end_of_line[(unsigned char) *s]; s++) | |
1136 | ; | |
1137 | *stopcp = *s; | |
1138 | *s = '\0'; | |
1139 | return s; | |
1140 | ||
1141 | #endif | |
1142 | ||
1143 | } | |
1144 | ||
1145 | /* Skip to the end of an MRI comment field. */ | |
1146 | ||
1147 | void | |
1148 | mri_comment_end (stop, stopc) | |
1149 | char *stop; | |
1150 | int stopc; | |
1151 | { | |
1152 | know (flag_mri); | |
1153 | ||
1154 | input_line_pointer = stop; | |
1155 | *stop = stopc; | |
1156 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1157 | ++input_line_pointer; | |
1158 | } | |
1159 | ||
1160 | void | |
1161 | s_abort (ignore) | |
ab9da554 | 1162 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1163 | { |
1164 | as_fatal (_(".abort detected. Abandoning ship.")); | |
1165 | } | |
1166 | ||
1167 | /* Guts of .align directive. N is the power of two to which to align. | |
1168 | FILL may be NULL, or it may point to the bytes of the fill pattern. | |
1169 | LEN is the length of whatever FILL points to, if anything. MAX is | |
1170 | the maximum number of characters to skip when doing the alignment, | |
1171 | or 0 if there is no maximum. */ | |
1172 | ||
1173 | static void | |
1174 | do_align (n, fill, len, max) | |
1175 | int n; | |
1176 | char *fill; | |
1177 | int len; | |
1178 | int max; | |
1179 | { | |
1180 | char default_fill; | |
1181 | ||
1182 | #ifdef md_do_align | |
1183 | md_do_align (n, fill, len, max, just_record_alignment); | |
1184 | #endif | |
1185 | ||
1186 | if (fill == NULL) | |
1187 | { | |
b9e57a38 | 1188 | if (subseg_text_p (now_seg)) |
252b5132 RH |
1189 | default_fill = NOP_OPCODE; |
1190 | else | |
1191 | default_fill = 0; | |
1192 | fill = &default_fill; | |
1193 | len = 1; | |
1194 | } | |
1195 | ||
1196 | /* Only make a frag if we HAVE to. . . */ | |
1197 | if (n != 0 && !need_pass_2) | |
1198 | { | |
1199 | if (len <= 1) | |
1200 | frag_align (n, *fill, max); | |
1201 | else | |
1202 | frag_align_pattern (n, fill, len, max); | |
1203 | } | |
1204 | ||
1205 | #ifdef md_do_align | |
1206 | just_record_alignment: | |
1207 | #endif | |
1208 | ||
bea9907b | 1209 | record_alignment (now_seg, n - OCTETS_PER_BYTE_POWER); |
252b5132 RH |
1210 | } |
1211 | ||
1212 | /* Handle the .align pseudo-op. A positive ARG is a default alignment | |
1213 | (in bytes). A negative ARG is the negative of the length of the | |
1214 | fill pattern. BYTES_P is non-zero if the alignment value should be | |
1215 | interpreted as the byte boundary, rather than the power of 2. */ | |
1216 | ||
1217 | static void | |
1218 | s_align (arg, bytes_p) | |
1219 | int arg; | |
1220 | int bytes_p; | |
1221 | { | |
1222 | register unsigned int align; | |
1223 | char *stop = NULL; | |
1224 | char stopc; | |
1225 | offsetT fill = 0; | |
1226 | int max; | |
1227 | int fill_p; | |
1228 | ||
1229 | if (flag_mri) | |
1230 | stop = mri_comment_field (&stopc); | |
1231 | ||
1232 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
1233 | { | |
1234 | if (arg < 0) | |
1235 | align = 0; | |
1236 | else | |
1237 | align = arg; /* Default value from pseudo-op table */ | |
1238 | } | |
1239 | else | |
1240 | { | |
1241 | align = get_absolute_expression (); | |
1242 | SKIP_WHITESPACE (); | |
1243 | } | |
1244 | ||
1245 | if (bytes_p) | |
1246 | { | |
1247 | /* Convert to a power of 2. */ | |
1248 | if (align != 0) | |
1249 | { | |
1250 | unsigned int i; | |
1251 | ||
1252 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
1253 | ; | |
1254 | if (align != 1) | |
1255 | as_bad (_("Alignment not a power of 2")); | |
1256 | align = i; | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | if (align > 15) | |
1261 | { | |
1262 | align = 15; | |
1263 | as_bad (_("Alignment too large: %u assumed"), align); | |
1264 | } | |
1265 | ||
1266 | if (*input_line_pointer != ',') | |
1267 | { | |
1268 | fill_p = 0; | |
1269 | max = 0; | |
1270 | } | |
1271 | else | |
1272 | { | |
1273 | ++input_line_pointer; | |
1274 | if (*input_line_pointer == ',') | |
1275 | fill_p = 0; | |
1276 | else | |
1277 | { | |
1278 | fill = get_absolute_expression (); | |
1279 | SKIP_WHITESPACE (); | |
1280 | fill_p = 1; | |
1281 | } | |
1282 | ||
1283 | if (*input_line_pointer != ',') | |
1284 | max = 0; | |
1285 | else | |
1286 | { | |
1287 | ++input_line_pointer; | |
1288 | max = get_absolute_expression (); | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | if (! fill_p) | |
1293 | { | |
1294 | if (arg < 0) | |
1295 | as_warn (_("expected fill pattern missing")); | |
1296 | do_align (align, (char *) NULL, 0, max); | |
1297 | } | |
1298 | else | |
1299 | { | |
1300 | int fill_len; | |
1301 | ||
1302 | if (arg >= 0) | |
1303 | fill_len = 1; | |
1304 | else | |
1305 | fill_len = - arg; | |
1306 | if (fill_len <= 1) | |
1307 | { | |
1308 | char fill_char; | |
1309 | ||
1310 | fill_char = fill; | |
1311 | do_align (align, &fill_char, fill_len, max); | |
1312 | } | |
1313 | else | |
1314 | { | |
1315 | char ab[16]; | |
1316 | ||
1317 | if ((size_t) fill_len > sizeof ab) | |
1318 | abort (); | |
1319 | md_number_to_chars (ab, fill, fill_len); | |
1320 | do_align (align, ab, fill_len, max); | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | demand_empty_rest_of_line (); | |
1325 | ||
1326 | if (flag_mri) | |
1327 | mri_comment_end (stop, stopc); | |
1328 | } | |
1329 | ||
1330 | /* Handle the .align pseudo-op on machines where ".align 4" means | |
1331 | align to a 4 byte boundary. */ | |
1332 | ||
1333 | void | |
1334 | s_align_bytes (arg) | |
1335 | int arg; | |
1336 | { | |
1337 | s_align (arg, 1); | |
1338 | } | |
1339 | ||
1340 | /* Handle the .align pseudo-op on machines where ".align 4" means align | |
1341 | to a 2**4 boundary. */ | |
1342 | ||
1343 | void | |
1344 | s_align_ptwo (arg) | |
1345 | int arg; | |
1346 | { | |
1347 | s_align (arg, 0); | |
1348 | } | |
1349 | ||
1350 | void | |
1351 | s_comm (ignore) | |
ab9da554 | 1352 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1353 | { |
1354 | register char *name; | |
1355 | register char c; | |
1356 | register char *p; | |
1357 | offsetT temp; | |
1358 | register symbolS *symbolP; | |
1359 | char *stop = NULL; | |
1360 | char stopc; | |
1361 | ||
1362 | if (flag_mri) | |
1363 | stop = mri_comment_field (&stopc); | |
1364 | ||
1365 | name = input_line_pointer; | |
1366 | c = get_symbol_end (); | |
1367 | /* just after name is now '\0' */ | |
1368 | p = input_line_pointer; | |
1369 | *p = c; | |
1370 | SKIP_WHITESPACE (); | |
1371 | if (*input_line_pointer != ',') | |
1372 | { | |
1373 | as_bad (_("Expected comma after symbol-name: rest of line ignored.")); | |
1374 | ignore_rest_of_line (); | |
1375 | if (flag_mri) | |
1376 | mri_comment_end (stop, stopc); | |
1377 | return; | |
1378 | } | |
1379 | input_line_pointer++; /* skip ',' */ | |
1380 | if ((temp = get_absolute_expression ()) < 0) | |
1381 | { | |
1382 | as_warn (_(".COMMon length (%ld.) <0! Ignored."), (long) temp); | |
1383 | ignore_rest_of_line (); | |
1384 | if (flag_mri) | |
1385 | mri_comment_end (stop, stopc); | |
1386 | return; | |
1387 | } | |
1388 | *p = 0; | |
1389 | symbolP = symbol_find_or_make (name); | |
1390 | *p = c; | |
1391 | if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP)) | |
1392 | { | |
1393 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
1394 | S_GET_NAME (symbolP)); | |
1395 | ignore_rest_of_line (); | |
1396 | if (flag_mri) | |
1397 | mri_comment_end (stop, stopc); | |
1398 | return; | |
1399 | } | |
1400 | if (S_GET_VALUE (symbolP)) | |
1401 | { | |
1402 | if (S_GET_VALUE (symbolP) != (valueT) temp) | |
1403 | as_bad (_("Length of .comm \"%s\" is already %ld. Not changed to %ld."), | |
1404 | S_GET_NAME (symbolP), | |
1405 | (long) S_GET_VALUE (symbolP), | |
1406 | (long) temp); | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | S_SET_VALUE (symbolP, (valueT) temp); | |
1411 | S_SET_EXTERNAL (symbolP); | |
1412 | } | |
1413 | #ifdef OBJ_VMS | |
1414 | { | |
1415 | extern int flag_one; | |
1416 | if ( (!temp) || !flag_one) | |
1417 | S_GET_OTHER(symbolP) = const_flag; | |
1418 | } | |
1419 | #endif /* not OBJ_VMS */ | |
1420 | know (symbolP->sy_frag == &zero_address_frag); | |
1421 | ||
1422 | demand_empty_rest_of_line (); | |
1423 | ||
1424 | if (flag_mri) | |
1425 | mri_comment_end (stop, stopc); | |
1426 | } /* s_comm() */ | |
1427 | ||
1428 | /* The MRI COMMON pseudo-op. We handle this by creating a common | |
1429 | symbol with the appropriate name. We make s_space do the right | |
1430 | thing by increasing the size. */ | |
1431 | ||
1432 | void | |
1433 | s_mri_common (small) | |
ab9da554 | 1434 | int small ATTRIBUTE_UNUSED; |
252b5132 RH |
1435 | { |
1436 | char *name; | |
1437 | char c; | |
1438 | char *alc = NULL; | |
1439 | symbolS *sym; | |
1440 | offsetT align; | |
1441 | char *stop = NULL; | |
1442 | char stopc; | |
1443 | ||
1444 | if (! flag_mri) | |
1445 | { | |
1446 | s_comm (0); | |
1447 | return; | |
1448 | } | |
1449 | ||
1450 | stop = mri_comment_field (&stopc); | |
1451 | ||
1452 | SKIP_WHITESPACE (); | |
1453 | ||
1454 | name = input_line_pointer; | |
1455 | if (! isdigit ((unsigned char) *name)) | |
1456 | c = get_symbol_end (); | |
1457 | else | |
1458 | { | |
1459 | do | |
1460 | { | |
1461 | ++input_line_pointer; | |
1462 | } | |
1463 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1464 | c = *input_line_pointer; | |
1465 | *input_line_pointer = '\0'; | |
1466 | ||
1467 | if (line_label != NULL) | |
1468 | { | |
1469 | alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) | |
1470 | + (input_line_pointer - name) | |
1471 | + 1); | |
1472 | sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); | |
1473 | name = alc; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | sym = symbol_find_or_make (name); | |
1478 | *input_line_pointer = c; | |
1479 | if (alc != NULL) | |
1480 | free (alc); | |
1481 | ||
1482 | if (*input_line_pointer != ',') | |
1483 | align = 0; | |
1484 | else | |
1485 | { | |
1486 | ++input_line_pointer; | |
1487 | align = get_absolute_expression (); | |
1488 | } | |
1489 | ||
1490 | if (S_IS_DEFINED (sym) && ! S_IS_COMMON (sym)) | |
1491 | { | |
1492 | as_bad (_("attempt to re-define symbol `%s'"), S_GET_NAME (sym)); | |
1493 | ignore_rest_of_line (); | |
1494 | mri_comment_end (stop, stopc); | |
1495 | return; | |
1496 | } | |
1497 | ||
1498 | S_SET_EXTERNAL (sym); | |
1499 | mri_common_symbol = sym; | |
1500 | ||
1501 | #ifdef S_SET_ALIGN | |
1502 | if (align != 0) | |
1503 | S_SET_ALIGN (sym, align); | |
1504 | #endif | |
1505 | ||
1506 | if (line_label != NULL) | |
1507 | { | |
2b47531b ILT |
1508 | expressionS exp; |
1509 | exp.X_op = O_symbol; | |
1510 | exp.X_add_symbol = sym; | |
1511 | exp.X_add_number = 0; | |
1512 | symbol_set_value_expression (line_label, &exp); | |
1513 | symbol_set_frag (line_label, &zero_address_frag); | |
252b5132 RH |
1514 | S_SET_SEGMENT (line_label, expr_section); |
1515 | } | |
1516 | ||
1517 | /* FIXME: We just ignore the small argument, which distinguishes | |
1518 | COMMON and COMMON.S. I don't know what we can do about it. */ | |
1519 | ||
1520 | /* Ignore the type and hptype. */ | |
1521 | if (*input_line_pointer == ',') | |
1522 | input_line_pointer += 2; | |
1523 | if (*input_line_pointer == ',') | |
1524 | input_line_pointer += 2; | |
1525 | ||
1526 | demand_empty_rest_of_line (); | |
1527 | ||
1528 | mri_comment_end (stop, stopc); | |
1529 | } | |
1530 | ||
1531 | void | |
1532 | s_data (ignore) | |
ab9da554 | 1533 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1534 | { |
1535 | segT section; | |
1536 | register int temp; | |
1537 | ||
1538 | temp = get_absolute_expression (); | |
1539 | if (flag_readonly_data_in_text) | |
1540 | { | |
1541 | section = text_section; | |
1542 | temp += 1000; | |
1543 | } | |
1544 | else | |
1545 | section = data_section; | |
1546 | ||
1547 | subseg_set (section, (subsegT) temp); | |
1548 | ||
1549 | #ifdef OBJ_VMS | |
1550 | const_flag = 0; | |
1551 | #endif | |
1552 | demand_empty_rest_of_line (); | |
1553 | } | |
1554 | ||
1555 | /* Handle the .appfile pseudo-op. This is automatically generated by | |
1556 | do_scrub_chars when a preprocessor # line comment is seen with a | |
1557 | file name. This default definition may be overridden by the object | |
1558 | or CPU specific pseudo-ops. This function is also the default | |
1559 | definition for .file; the APPFILE argument is 1 for .appfile, 0 for | |
1560 | .file. */ | |
1561 | ||
1562 | void | |
1563 | s_app_file (appfile) | |
1564 | int appfile; | |
1565 | { | |
1566 | register char *s; | |
1567 | int length; | |
1568 | ||
1569 | /* Some assemblers tolerate immediately following '"' */ | |
1570 | if ((s = demand_copy_string (&length)) != 0) | |
1571 | { | |
1572 | /* If this is a fake .appfile, a fake newline was inserted into | |
1573 | the buffer. Passing -2 to new_logical_line tells it to | |
1574 | account for it. */ | |
1575 | int may_omit | |
1576 | = (! new_logical_line (s, appfile ? -2 : -1) && appfile); | |
1577 | ||
1578 | /* In MRI mode, the preprocessor may have inserted an extraneous | |
1579 | backquote. */ | |
1580 | if (flag_m68k_mri | |
1581 | && *input_line_pointer == '\'' | |
1582 | && is_end_of_line[(unsigned char) input_line_pointer[1]]) | |
1583 | ++input_line_pointer; | |
1584 | ||
1585 | demand_empty_rest_of_line (); | |
1586 | if (! may_omit) | |
1587 | { | |
1588 | #ifdef LISTING | |
1589 | if (listing) | |
1590 | listing_source_file (s); | |
1591 | #endif | |
1592 | register_dependency (s); | |
1593 | #ifdef obj_app_file | |
1594 | obj_app_file (s); | |
1595 | #endif | |
1596 | } | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | /* Handle the .appline pseudo-op. This is automatically generated by | |
1601 | do_scrub_chars when a preprocessor # line comment is seen. This | |
1602 | default definition may be overridden by the object or CPU specific | |
1603 | pseudo-ops. */ | |
1604 | ||
1605 | void | |
1606 | s_app_line (ignore) | |
ab9da554 | 1607 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1608 | { |
1609 | int l; | |
1610 | ||
1611 | /* The given number is that of the next line. */ | |
1612 | l = get_absolute_expression () - 1; | |
1613 | if (l < 0) | |
1614 | /* Some of the back ends can't deal with non-positive line numbers. | |
1615 | Besides, it's silly. */ | |
1616 | as_warn (_("Line numbers must be positive; line number %d rejected."), l+1); | |
1617 | else | |
1618 | { | |
1619 | new_logical_line ((char *) NULL, l); | |
1620 | #ifdef LISTING | |
1621 | if (listing) | |
1622 | listing_source_line (l); | |
1623 | #endif | |
1624 | } | |
1625 | demand_empty_rest_of_line (); | |
1626 | } | |
1627 | ||
1628 | /* Handle the .end pseudo-op. Actually, the real work is done in | |
1629 | read_a_source_file. */ | |
1630 | ||
1631 | void | |
1632 | s_end (ignore) | |
ab9da554 | 1633 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1634 | { |
1635 | if (flag_mri) | |
1636 | { | |
1637 | /* The MRI assembler permits the start symbol to follow .end, | |
1638 | but we don't support that. */ | |
1639 | SKIP_WHITESPACE (); | |
1640 | if (! is_end_of_line[(unsigned char) *input_line_pointer] | |
1641 | && *input_line_pointer != '*' | |
1642 | && *input_line_pointer != '!') | |
1643 | as_warn (_("start address not supported")); | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* Handle the .err pseudo-op. */ | |
1648 | ||
1649 | void | |
1650 | s_err (ignore) | |
ab9da554 | 1651 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1652 | { |
1653 | as_bad (_(".err encountered")); | |
1654 | demand_empty_rest_of_line (); | |
1655 | } | |
1656 | ||
1657 | /* Handle the MRI fail pseudo-op. */ | |
1658 | ||
1659 | void | |
1660 | s_fail (ignore) | |
ab9da554 | 1661 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1662 | { |
1663 | offsetT temp; | |
1664 | char *stop = NULL; | |
1665 | char stopc; | |
1666 | ||
1667 | if (flag_mri) | |
1668 | stop = mri_comment_field (&stopc); | |
1669 | ||
1670 | temp = get_absolute_expression (); | |
1671 | if (temp >= 500) | |
1672 | as_warn (_(".fail %ld encountered"), (long) temp); | |
1673 | else | |
1674 | as_bad (_(".fail %ld encountered"), (long) temp); | |
1675 | ||
1676 | demand_empty_rest_of_line (); | |
1677 | ||
1678 | if (flag_mri) | |
1679 | mri_comment_end (stop, stopc); | |
1680 | } | |
1681 | ||
1682 | void | |
1683 | s_fill (ignore) | |
ab9da554 | 1684 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1685 | { |
1686 | expressionS rep_exp; | |
1687 | long size = 1; | |
1688 | register long fill = 0; | |
1689 | char *p; | |
1690 | ||
1691 | #ifdef md_flush_pending_output | |
1692 | md_flush_pending_output (); | |
1693 | #endif | |
1694 | ||
1695 | get_known_segmented_expression (&rep_exp); | |
1696 | if (*input_line_pointer == ',') | |
1697 | { | |
1698 | input_line_pointer++; | |
1699 | size = get_absolute_expression (); | |
1700 | if (*input_line_pointer == ',') | |
1701 | { | |
1702 | input_line_pointer++; | |
1703 | fill = get_absolute_expression (); | |
1704 | } | |
1705 | } | |
1706 | ||
1707 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ | |
1708 | #define BSD_FILL_SIZE_CROCK_8 (8) | |
1709 | if (size > BSD_FILL_SIZE_CROCK_8) | |
1710 | { | |
1711 | as_warn (_(".fill size clamped to %d."), BSD_FILL_SIZE_CROCK_8); | |
1712 | size = BSD_FILL_SIZE_CROCK_8; | |
1713 | } | |
1714 | if (size < 0) | |
1715 | { | |
1716 | as_warn (_("Size negative: .fill ignored.")); | |
1717 | size = 0; | |
1718 | } | |
1719 | else if (rep_exp.X_op == O_constant && rep_exp.X_add_number <= 0) | |
1720 | { | |
1721 | if (rep_exp.X_add_number < 0) | |
1722 | as_warn (_("Repeat < 0, .fill ignored")); | |
1723 | size = 0; | |
1724 | } | |
1725 | ||
1726 | if (size && !need_pass_2) | |
1727 | { | |
1728 | if (rep_exp.X_op == O_constant) | |
1729 | { | |
1730 | p = frag_var (rs_fill, (int) size, (int) size, | |
1731 | (relax_substateT) 0, (symbolS *) 0, | |
1732 | (offsetT) rep_exp.X_add_number, | |
1733 | (char *) 0); | |
1734 | } | |
1735 | else | |
1736 | { | |
1737 | /* We don't have a constant repeat count, so we can't use | |
1738 | rs_fill. We can get the same results out of rs_space, | |
1739 | but its argument is in bytes, so we must multiply the | |
1740 | repeat count by size. */ | |
1741 | ||
1742 | symbolS *rep_sym; | |
1743 | rep_sym = make_expr_symbol (&rep_exp); | |
1744 | if (size != 1) | |
1745 | { | |
1746 | expressionS size_exp; | |
1747 | size_exp.X_op = O_constant; | |
1748 | size_exp.X_add_number = size; | |
1749 | ||
1750 | rep_exp.X_op = O_multiply; | |
1751 | rep_exp.X_add_symbol = rep_sym; | |
1752 | rep_exp.X_op_symbol = make_expr_symbol (&size_exp); | |
1753 | rep_exp.X_add_number = 0; | |
1754 | rep_sym = make_expr_symbol (&rep_exp); | |
1755 | } | |
1756 | ||
1757 | p = frag_var (rs_space, (int) size, (int) size, | |
1758 | (relax_substateT) 0, rep_sym, (offsetT) 0, (char *) 0); | |
1759 | } | |
1760 | memset (p, 0, (unsigned int) size); | |
1761 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX | |
1762 | * flavoured AS. The following bizzare behaviour is to be | |
1763 | * compatible with above. I guess they tried to take up to 8 | |
1764 | * bytes from a 4-byte expression and they forgot to sign | |
1765 | * extend. Un*x Sux. */ | |
1766 | #define BSD_FILL_SIZE_CROCK_4 (4) | |
1767 | md_number_to_chars (p, (valueT) fill, | |
1768 | (size > BSD_FILL_SIZE_CROCK_4 | |
1769 | ? BSD_FILL_SIZE_CROCK_4 | |
1770 | : (int) size)); | |
1771 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
1772 | * but emits no error message because it seems a legal thing to do. | |
1773 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
1774 | */ | |
1775 | } | |
1776 | demand_empty_rest_of_line (); | |
1777 | } | |
1778 | ||
1779 | void | |
1780 | s_globl (ignore) | |
ab9da554 | 1781 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1782 | { |
1783 | char *name; | |
1784 | int c; | |
1785 | symbolS *symbolP; | |
1786 | char *stop = NULL; | |
1787 | char stopc; | |
1788 | ||
1789 | if (flag_mri) | |
1790 | stop = mri_comment_field (&stopc); | |
1791 | ||
1792 | do | |
1793 | { | |
1794 | name = input_line_pointer; | |
1795 | c = get_symbol_end (); | |
1796 | symbolP = symbol_find_or_make (name); | |
58b5739a RH |
1797 | S_SET_EXTERNAL (symbolP); |
1798 | ||
252b5132 RH |
1799 | *input_line_pointer = c; |
1800 | SKIP_WHITESPACE (); | |
58b5739a | 1801 | c = *input_line_pointer; |
252b5132 RH |
1802 | if (c == ',') |
1803 | { | |
1804 | input_line_pointer++; | |
1805 | SKIP_WHITESPACE (); | |
1806 | if (*input_line_pointer == '\n') | |
1807 | c = '\n'; | |
1808 | } | |
1809 | } | |
1810 | while (c == ','); | |
1811 | ||
1812 | demand_empty_rest_of_line (); | |
1813 | ||
1814 | if (flag_mri) | |
1815 | mri_comment_end (stop, stopc); | |
1816 | } | |
1817 | ||
1818 | /* Handle the MRI IRP and IRPC pseudo-ops. */ | |
1819 | ||
1820 | void | |
1821 | s_irp (irpc) | |
1822 | int irpc; | |
1823 | { | |
1824 | char *file; | |
1825 | unsigned int line; | |
1826 | sb s; | |
1827 | const char *err; | |
1828 | sb out; | |
1829 | ||
1830 | as_where (&file, &line); | |
1831 | ||
1832 | sb_new (&s); | |
1833 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1834 | sb_add_char (&s, *input_line_pointer++); | |
1835 | ||
1836 | sb_new (&out); | |
1837 | ||
1838 | err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); | |
1839 | if (err != NULL) | |
1840 | as_bad_where (file, line, "%s", err); | |
1841 | ||
1842 | sb_kill (&s); | |
1843 | ||
9f10757c | 1844 | input_scrub_include_sb (&out, input_line_pointer, 1); |
252b5132 RH |
1845 | sb_kill (&out); |
1846 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1847 | } | |
1848 | ||
1849 | /* Handle the .linkonce pseudo-op. This tells the assembler to mark | |
1850 | the section to only be linked once. However, this is not supported | |
1851 | by most object file formats. This takes an optional argument, | |
1852 | which is what to do about duplicates. */ | |
1853 | ||
1854 | void | |
1855 | s_linkonce (ignore) | |
ab9da554 | 1856 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
1857 | { |
1858 | enum linkonce_type type; | |
1859 | ||
1860 | SKIP_WHITESPACE (); | |
1861 | ||
1862 | type = LINKONCE_DISCARD; | |
1863 | ||
1864 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1865 | { | |
1866 | char *s; | |
1867 | char c; | |
1868 | ||
1869 | s = input_line_pointer; | |
1870 | c = get_symbol_end (); | |
1871 | if (strcasecmp (s, "discard") == 0) | |
1872 | type = LINKONCE_DISCARD; | |
1873 | else if (strcasecmp (s, "one_only") == 0) | |
1874 | type = LINKONCE_ONE_ONLY; | |
1875 | else if (strcasecmp (s, "same_size") == 0) | |
1876 | type = LINKONCE_SAME_SIZE; | |
1877 | else if (strcasecmp (s, "same_contents") == 0) | |
1878 | type = LINKONCE_SAME_CONTENTS; | |
1879 | else | |
1880 | as_warn (_("unrecognized .linkonce type `%s'"), s); | |
1881 | ||
1882 | *input_line_pointer = c; | |
1883 | } | |
1884 | ||
1885 | #ifdef obj_handle_link_once | |
1886 | obj_handle_link_once (type); | |
1887 | #else /* ! defined (obj_handle_link_once) */ | |
1888 | #ifdef BFD_ASSEMBLER | |
1889 | { | |
1890 | flagword flags; | |
1891 | ||
1892 | if ((bfd_applicable_section_flags (stdoutput) & SEC_LINK_ONCE) == 0) | |
1893 | as_warn (_(".linkonce is not supported for this object file format")); | |
1894 | ||
1895 | flags = bfd_get_section_flags (stdoutput, now_seg); | |
1896 | flags |= SEC_LINK_ONCE; | |
1897 | switch (type) | |
1898 | { | |
1899 | default: | |
1900 | abort (); | |
1901 | case LINKONCE_DISCARD: | |
1902 | flags |= SEC_LINK_DUPLICATES_DISCARD; | |
1903 | break; | |
1904 | case LINKONCE_ONE_ONLY: | |
1905 | flags |= SEC_LINK_DUPLICATES_ONE_ONLY; | |
1906 | break; | |
1907 | case LINKONCE_SAME_SIZE: | |
1908 | flags |= SEC_LINK_DUPLICATES_SAME_SIZE; | |
1909 | break; | |
1910 | case LINKONCE_SAME_CONTENTS: | |
1911 | flags |= SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
1912 | break; | |
1913 | } | |
1914 | if (! bfd_set_section_flags (stdoutput, now_seg, flags)) | |
1915 | as_bad (_("bfd_set_section_flags: %s"), | |
1916 | bfd_errmsg (bfd_get_error ())); | |
1917 | } | |
1918 | #else /* ! defined (BFD_ASSEMBLER) */ | |
1919 | as_warn (_(".linkonce is not supported for this object file format")); | |
1920 | #endif /* ! defined (BFD_ASSEMBLER) */ | |
1921 | #endif /* ! defined (obj_handle_link_once) */ | |
1922 | ||
1923 | demand_empty_rest_of_line (); | |
1924 | } | |
1925 | ||
1926 | static void | |
1927 | s_lcomm_internal (needs_align, bytes_p) | |
1928 | /* 1 if this was a ".bss" directive, which may require a 3rd argument | |
1929 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1930 | int needs_align; | |
1931 | /* 1 if the alignment value should be interpreted as the byte boundary, | |
1932 | rather than the power of 2. */ | |
1933 | int bytes_p; | |
1934 | { | |
1935 | register char *name; | |
1936 | register char c; | |
1937 | register char *p; | |
1938 | register int temp; | |
1939 | register symbolS *symbolP; | |
1940 | segT current_seg = now_seg; | |
1941 | subsegT current_subseg = now_subseg; | |
1942 | const int max_alignment = 15; | |
1943 | int align = 0; | |
1944 | segT bss_seg = bss_section; | |
1945 | ||
1946 | name = input_line_pointer; | |
1947 | c = get_symbol_end (); | |
1948 | p = input_line_pointer; | |
1949 | *p = c; | |
1950 | SKIP_WHITESPACE (); | |
1951 | ||
1952 | /* Accept an optional comma after the name. The comma used to be | |
1953 | required, but Irix 5 cc does not generate it. */ | |
1954 | if (*input_line_pointer == ',') | |
1955 | { | |
1956 | ++input_line_pointer; | |
1957 | SKIP_WHITESPACE (); | |
1958 | } | |
1959 | ||
1960 | if (*input_line_pointer == '\n') | |
1961 | { | |
1962 | as_bad (_("Missing size expression")); | |
1963 | return; | |
1964 | } | |
1965 | ||
1966 | if ((temp = get_absolute_expression ()) < 0) | |
1967 | { | |
1968 | as_warn (_("BSS length (%d.) <0! Ignored."), temp); | |
1969 | ignore_rest_of_line (); | |
1970 | return; | |
1971 | } | |
1972 | ||
1973 | #if defined (TC_MIPS) || defined (TC_ALPHA) | |
1974 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour | |
1975 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
1976 | { | |
1977 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ | |
1978 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1979 | { | |
1980 | bss_seg = subseg_new (".sbss", 1); | |
1981 | seg_info (bss_seg)->bss = 1; | |
1982 | #ifdef BFD_ASSEMBLER | |
1983 | if (! bfd_set_section_flags (stdoutput, bss_seg, SEC_ALLOC)) | |
1984 | as_warn (_("error setting flags for \".sbss\": %s"), | |
1985 | bfd_errmsg (bfd_get_error ())); | |
1986 | #endif | |
1987 | } | |
1988 | } | |
1989 | #endif | |
8684e216 | 1990 | |
252b5132 RH |
1991 | if (!needs_align) |
1992 | { | |
8684e216 | 1993 | TC_IMPLICIT_LCOMM_ALIGNMENT (temp, align); |
252b5132 | 1994 | |
8684e216 HPN |
1995 | /* Still zero unless TC_IMPLICIT_LCOMM_ALIGNMENT set it. */ |
1996 | if (align) | |
1997 | record_alignment(bss_seg, align); | |
252b5132 RH |
1998 | } |
1999 | ||
2000 | if (needs_align) | |
2001 | { | |
2002 | align = 0; | |
2003 | SKIP_WHITESPACE (); | |
2004 | if (*input_line_pointer != ',') | |
2005 | { | |
2006 | as_bad (_("Expected comma after size")); | |
2007 | ignore_rest_of_line (); | |
2008 | return; | |
2009 | } | |
2010 | input_line_pointer++; | |
2011 | SKIP_WHITESPACE (); | |
2012 | if (*input_line_pointer == '\n') | |
2013 | { | |
2014 | as_bad (_("Missing alignment")); | |
2015 | return; | |
2016 | } | |
2017 | align = get_absolute_expression (); | |
2018 | if (bytes_p) | |
2019 | { | |
2020 | /* Convert to a power of 2. */ | |
2021 | if (align != 0) | |
2022 | { | |
2023 | unsigned int i; | |
2024 | ||
2025 | for (i = 0; (align & 1) == 0; align >>= 1, ++i) | |
2026 | ; | |
2027 | if (align != 1) | |
2028 | as_bad (_("Alignment not a power of 2")); | |
2029 | align = i; | |
2030 | } | |
2031 | } | |
2032 | if (align > max_alignment) | |
2033 | { | |
2034 | align = max_alignment; | |
2035 | as_warn (_("Alignment too large: %d. assumed."), align); | |
2036 | } | |
2037 | else if (align < 0) | |
2038 | { | |
2039 | align = 0; | |
2040 | as_warn (_("Alignment negative. 0 assumed.")); | |
2041 | } | |
2042 | record_alignment (bss_seg, align); | |
2043 | } /* if needs align */ | |
2044 | else | |
2045 | { | |
2046 | /* Assume some objects may require alignment on some systems. */ | |
2047 | #if defined (TC_ALPHA) && ! defined (VMS) | |
2048 | if (temp > 1) | |
2049 | { | |
2050 | align = ffs (temp) - 1; | |
2051 | if (temp % (1 << align)) | |
2052 | abort (); | |
2053 | } | |
2054 | #endif | |
2055 | } | |
2056 | ||
2057 | *p = 0; | |
2058 | symbolP = symbol_find_or_make (name); | |
2059 | *p = c; | |
2060 | ||
2061 | if ( | |
4c63da97 AM |
2062 | #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) \ |
2063 | || defined (OBJ_BOUT) || defined (OBJ_MAYBE_BOUT)) | |
2064 | #ifdef BFD_ASSEMBLER | |
2065 | (OUTPUT_FLAVOR != bfd_target_aout_flavour | |
2066 | || (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0)) && | |
2067 | #else | |
2068 | (S_GET_OTHER (symbolP) == 0 && S_GET_DESC (symbolP) == 0) && | |
2069 | #endif | |
2070 | #endif | |
2071 | (S_GET_SEGMENT (symbolP) == bss_seg | |
2072 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) | |
252b5132 RH |
2073 | { |
2074 | char *pfrag; | |
2075 | ||
2076 | subseg_set (bss_seg, 1); | |
2077 | ||
2078 | if (align) | |
2079 | frag_align (align, 0, 0); | |
2080 | /* detach from old frag */ | |
2081 | if (S_GET_SEGMENT (symbolP) == bss_seg) | |
2b47531b | 2082 | symbol_get_frag (symbolP)->fr_symbol = NULL; |
252b5132 | 2083 | |
2b47531b | 2084 | symbol_set_frag (symbolP, frag_now); |
252b5132 RH |
2085 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
2086 | (offsetT) temp, (char *) 0); | |
2087 | *pfrag = 0; | |
2088 | ||
2089 | S_SET_SEGMENT (symbolP, bss_seg); | |
2090 | ||
2091 | #ifdef OBJ_COFF | |
2092 | /* The symbol may already have been created with a preceding | |
2093 | ".globl" directive -- be careful not to step on storage class | |
2094 | in that case. Otherwise, set it to static. */ | |
2095 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) | |
2096 | { | |
2097 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
2098 | } | |
2099 | #endif /* OBJ_COFF */ | |
2100 | ||
2101 | #ifdef S_SET_SIZE | |
2102 | S_SET_SIZE (symbolP, temp); | |
2103 | #endif | |
2104 | } | |
2105 | else | |
2106 | as_bad (_("Ignoring attempt to re-define symbol `%s'."), | |
2107 | S_GET_NAME (symbolP)); | |
2108 | ||
2109 | subseg_set (current_seg, current_subseg); | |
2110 | ||
2111 | demand_empty_rest_of_line (); | |
2112 | } /* s_lcomm_internal() */ | |
2113 | ||
2114 | void | |
2115 | s_lcomm (needs_align) | |
2116 | int needs_align; | |
2117 | { | |
2118 | s_lcomm_internal (needs_align, 0); | |
2119 | } | |
2120 | ||
2121 | void s_lcomm_bytes (needs_align) | |
2122 | int needs_align; | |
2123 | { | |
2124 | s_lcomm_internal (needs_align, 1); | |
2125 | } | |
2126 | ||
2127 | void | |
2128 | s_lsym (ignore) | |
ab9da554 | 2129 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2130 | { |
2131 | register char *name; | |
2132 | register char c; | |
2133 | register char *p; | |
2134 | expressionS exp; | |
2135 | register symbolS *symbolP; | |
2136 | ||
2137 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
2138 | name = input_line_pointer; | |
2139 | c = get_symbol_end (); | |
2140 | p = input_line_pointer; | |
2141 | *p = c; | |
2142 | SKIP_WHITESPACE (); | |
2143 | if (*input_line_pointer != ',') | |
2144 | { | |
2145 | *p = 0; | |
2146 | as_bad (_("Expected comma after name \"%s\""), name); | |
2147 | *p = c; | |
2148 | ignore_rest_of_line (); | |
2149 | return; | |
2150 | } | |
2151 | input_line_pointer++; | |
2152 | expression (&exp); | |
2153 | if (exp.X_op != O_constant | |
2154 | && exp.X_op != O_register) | |
2155 | { | |
2156 | as_bad (_("bad expression")); | |
2157 | ignore_rest_of_line (); | |
2158 | return; | |
2159 | } | |
2160 | *p = 0; | |
2161 | symbolP = symbol_find_or_make (name); | |
2162 | ||
2163 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && | |
2164 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
2165 | those fields, and I can't see when they'd ever be tripped. I | |
2166 | don't think I understand why they were here so I may have | |
2167 | introduced a bug. As recently as 1.37 didn't have this test | |
2168 | anyway. xoxorich. */ | |
2169 | ||
2170 | if (S_GET_SEGMENT (symbolP) == undefined_section | |
2171 | && S_GET_VALUE (symbolP) == 0) | |
2172 | { | |
2173 | /* The name might be an undefined .global symbol; be sure to | |
2174 | keep the "external" bit. */ | |
2175 | S_SET_SEGMENT (symbolP, | |
2176 | (exp.X_op == O_constant | |
2177 | ? absolute_section | |
2178 | : reg_section)); | |
2179 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
2180 | } | |
2181 | else | |
2182 | { | |
2183 | as_bad (_("Symbol %s already defined"), name); | |
2184 | } | |
2185 | *p = c; | |
2186 | demand_empty_rest_of_line (); | |
2187 | } /* s_lsym() */ | |
2188 | ||
2189 | /* Read a line into an sb. */ | |
2190 | ||
2191 | static int | |
2192 | get_line_sb (line) | |
2193 | sb *line; | |
2194 | { | |
2195 | char quote1, quote2, inquote; | |
2196 | ||
2197 | if (input_line_pointer[-1] == '\n') | |
2198 | bump_line_counters (); | |
2199 | ||
2200 | if (input_line_pointer >= buffer_limit) | |
2201 | { | |
2202 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2203 | if (buffer_limit == 0) | |
2204 | return 0; | |
2205 | } | |
2206 | ||
2207 | /* If app.c sets any other characters to LEX_IS_STRINGQUOTE, this | |
2208 | code needs to be changed. */ | |
2209 | if (! flag_m68k_mri) | |
2210 | quote1 = '"'; | |
2211 | else | |
2212 | quote1 = '\0'; | |
2213 | ||
2214 | quote2 = '\0'; | |
2215 | if (flag_m68k_mri) | |
2216 | quote2 = '\''; | |
2217 | #ifdef LEX_IS_STRINGQUOTE | |
2218 | quote2 = '\''; | |
2219 | #endif | |
2220 | ||
2221 | inquote = '\0'; | |
2222 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
2223 | || (inquote != '\0' && *input_line_pointer != '\n')) | |
2224 | { | |
2225 | if (inquote == *input_line_pointer) | |
2226 | inquote = '\0'; | |
2227 | else if (inquote == '\0') | |
2228 | { | |
2229 | if (*input_line_pointer == quote1) | |
2230 | inquote = quote1; | |
2231 | else if (*input_line_pointer == quote2) | |
2232 | inquote = quote2; | |
2233 | } | |
2234 | sb_add_char (line, *input_line_pointer++); | |
2235 | } | |
2236 | while (input_line_pointer < buffer_limit | |
2237 | && is_end_of_line[(unsigned char) *input_line_pointer]) | |
2238 | { | |
2239 | if (input_line_pointer[-1] == '\n') | |
2240 | bump_line_counters (); | |
2241 | ++input_line_pointer; | |
2242 | } | |
2243 | return 1; | |
2244 | } | |
2245 | ||
2246 | /* Define a macro. This is an interface to macro.c, which is shared | |
2247 | between gas and gasp. */ | |
2248 | ||
2249 | void | |
2250 | s_macro (ignore) | |
ab9da554 | 2251 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2252 | { |
2253 | char *file; | |
2254 | unsigned int line; | |
2255 | sb s; | |
2256 | sb label; | |
2257 | const char *err; | |
2258 | const char *name; | |
2259 | ||
2260 | as_where (&file, &line); | |
2261 | ||
2262 | sb_new (&s); | |
2263 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
2264 | sb_add_char (&s, *input_line_pointer++); | |
2265 | ||
2266 | sb_new (&label); | |
2267 | if (line_label != NULL) | |
2268 | sb_add_string (&label, S_GET_NAME (line_label)); | |
2269 | ||
2270 | err = define_macro (0, &s, &label, get_line_sb, &name); | |
2271 | if (err != NULL) | |
2272 | as_bad_where (file, line, "%s", err); | |
2273 | else | |
2274 | { | |
2275 | if (line_label != NULL) | |
2276 | { | |
2277 | S_SET_SEGMENT (line_label, undefined_section); | |
2278 | S_SET_VALUE (line_label, 0); | |
2b47531b | 2279 | symbol_set_frag (line_label, &zero_address_frag); |
252b5132 RH |
2280 | } |
2281 | ||
abd63a32 | 2282 | if (((NO_PSEUDO_DOT || flag_m68k_mri) |
252b5132 RH |
2283 | && hash_find (po_hash, name) != NULL) |
2284 | || (! flag_m68k_mri | |
2285 | && *name == '.' | |
2286 | && hash_find (po_hash, name + 1) != NULL)) | |
2287 | as_warn (_("attempt to redefine pseudo-op `%s' ignored"), | |
2288 | name); | |
2289 | } | |
2290 | ||
2291 | sb_kill (&s); | |
2292 | } | |
2293 | ||
2294 | /* Handle the .mexit pseudo-op, which immediately exits a macro | |
2295 | expansion. */ | |
2296 | ||
2297 | void | |
2298 | s_mexit (ignore) | |
ab9da554 | 2299 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2300 | { |
2301 | cond_exit_macro (macro_nest); | |
2302 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2303 | } | |
2304 | ||
2305 | /* Switch in and out of MRI mode. */ | |
2306 | ||
2307 | void | |
2308 | s_mri (ignore) | |
ab9da554 | 2309 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2310 | { |
2311 | int on, old_flag; | |
2312 | ||
2313 | on = get_absolute_expression (); | |
2314 | old_flag = flag_mri; | |
2315 | if (on != 0) | |
2316 | { | |
2317 | flag_mri = 1; | |
2318 | #ifdef TC_M68K | |
2319 | flag_m68k_mri = 1; | |
2320 | #endif | |
2321 | macro_mri_mode (1); | |
2322 | } | |
2323 | else | |
2324 | { | |
2325 | flag_mri = 0; | |
abd63a32 | 2326 | #ifdef TC_M68K |
252b5132 | 2327 | flag_m68k_mri = 0; |
abd63a32 | 2328 | #endif |
252b5132 RH |
2329 | macro_mri_mode (0); |
2330 | } | |
2331 | ||
2332 | /* Operator precedence changes in m68k MRI mode, so we need to | |
2333 | update the operator rankings. */ | |
2334 | expr_set_precedence (); | |
2335 | ||
2336 | #ifdef MRI_MODE_CHANGE | |
2337 | if (on != old_flag) | |
2338 | MRI_MODE_CHANGE (on); | |
2339 | #endif | |
2340 | ||
2341 | demand_empty_rest_of_line (); | |
2342 | } | |
2343 | ||
2344 | /* Handle changing the location counter. */ | |
2345 | ||
2346 | static void | |
2347 | do_org (segment, exp, fill) | |
2348 | segT segment; | |
2349 | expressionS *exp; | |
2350 | int fill; | |
2351 | { | |
2352 | if (segment != now_seg && segment != absolute_section) | |
2353 | as_bad (_("invalid segment \"%s\"; segment \"%s\" assumed"), | |
2354 | segment_name (segment), segment_name (now_seg)); | |
2355 | ||
2356 | if (now_seg == absolute_section) | |
2357 | { | |
2358 | if (fill != 0) | |
2359 | as_warn (_("ignoring fill value in absolute section")); | |
2360 | if (exp->X_op != O_constant) | |
2361 | { | |
2362 | as_bad (_("only constant offsets supported in absolute section")); | |
2363 | exp->X_add_number = 0; | |
2364 | } | |
2365 | abs_section_offset = exp->X_add_number; | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | char *p; | |
2370 | ||
2371 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, | |
bea9907b | 2372 | exp->X_add_number * OCTETS_PER_BYTE, (char *) NULL); |
252b5132 RH |
2373 | *p = fill; |
2374 | } | |
2375 | } | |
2376 | ||
2377 | void | |
2378 | s_org (ignore) | |
ab9da554 | 2379 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2380 | { |
2381 | register segT segment; | |
2382 | expressionS exp; | |
2383 | register long temp_fill; | |
2384 | ||
2385 | #ifdef md_flush_pending_output | |
2386 | md_flush_pending_output (); | |
2387 | #endif | |
2388 | ||
2389 | /* The m68k MRI assembler has a different meaning for .org. It | |
2390 | means to create an absolute section at a given address. We can't | |
2391 | support that--use a linker script instead. */ | |
2392 | if (flag_m68k_mri) | |
2393 | { | |
2394 | as_bad (_("MRI style ORG pseudo-op not supported")); | |
2395 | ignore_rest_of_line (); | |
2396 | return; | |
2397 | } | |
2398 | ||
2399 | /* Don't believe the documentation of BSD 4.2 AS. There is no such | |
2400 | thing as a sub-segment-relative origin. Any absolute origin is | |
2401 | given a warning, then assumed to be segment-relative. Any | |
2402 | segmented origin expression ("foo+42") had better be in the right | |
2403 | segment or the .org is ignored. | |
2404 | ||
2405 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
2406 | we never know sub-segment sizes when we are reading code. BSD | |
2407 | will crash trying to emit negative numbers of filler bytes in | |
2408 | certain .orgs. We don't crash, but see as-write for that code. | |
2409 | ||
2410 | Don't make frag if need_pass_2==1. */ | |
2411 | segment = get_known_segmented_expression (&exp); | |
2412 | if (*input_line_pointer == ',') | |
2413 | { | |
2414 | input_line_pointer++; | |
2415 | temp_fill = get_absolute_expression (); | |
2416 | } | |
2417 | else | |
2418 | temp_fill = 0; | |
2419 | ||
2420 | if (!need_pass_2) | |
2421 | do_org (segment, &exp, temp_fill); | |
2422 | ||
2423 | demand_empty_rest_of_line (); | |
2424 | } /* s_org() */ | |
2425 | ||
2426 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be | |
2427 | called by the obj-format routine which handles section changing | |
2428 | when in MRI mode. It will create a new section, and return it. It | |
2429 | will set *TYPE to the section type: one of 'C' (code), 'D' (data), | |
2430 | 'M' (mixed), or 'R' (romable). If BFD_ASSEMBLER is defined, the | |
2431 | flags will be set in the section. */ | |
2432 | ||
2433 | void | |
2434 | s_mri_sect (type) | |
ab9da554 | 2435 | char *type ATTRIBUTE_UNUSED; |
252b5132 RH |
2436 | { |
2437 | #ifdef TC_M68K | |
2438 | ||
2439 | char *name; | |
2440 | char c; | |
2441 | segT seg; | |
2442 | ||
2443 | SKIP_WHITESPACE (); | |
2444 | ||
2445 | name = input_line_pointer; | |
2446 | if (! isdigit ((unsigned char) *name)) | |
2447 | c = get_symbol_end (); | |
2448 | else | |
2449 | { | |
2450 | do | |
2451 | { | |
2452 | ++input_line_pointer; | |
2453 | } | |
2454 | while (isdigit ((unsigned char) *input_line_pointer)); | |
2455 | c = *input_line_pointer; | |
2456 | *input_line_pointer = '\0'; | |
2457 | } | |
2458 | ||
2459 | name = xstrdup (name); | |
2460 | ||
2461 | *input_line_pointer = c; | |
2462 | ||
2463 | seg = subseg_new (name, 0); | |
2464 | ||
2465 | if (*input_line_pointer == ',') | |
2466 | { | |
2467 | int align; | |
2468 | ||
2469 | ++input_line_pointer; | |
2470 | align = get_absolute_expression (); | |
2471 | record_alignment (seg, align); | |
2472 | } | |
2473 | ||
2474 | *type = 'C'; | |
2475 | if (*input_line_pointer == ',') | |
2476 | { | |
2477 | c = *++input_line_pointer; | |
2478 | c = toupper ((unsigned char) c); | |
2479 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') | |
2480 | *type = c; | |
2481 | else | |
2482 | as_bad (_("unrecognized section type")); | |
2483 | ++input_line_pointer; | |
2484 | ||
2485 | #ifdef BFD_ASSEMBLER | |
2486 | { | |
2487 | flagword flags; | |
2488 | ||
2489 | flags = SEC_NO_FLAGS; | |
2490 | if (*type == 'C') | |
2491 | flags = SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE; | |
2492 | else if (*type == 'D' || *type == 'M') | |
2493 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA; | |
2494 | else if (*type == 'R') | |
2495 | flags = SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_READONLY | SEC_ROM; | |
2496 | if (flags != SEC_NO_FLAGS) | |
2497 | { | |
2498 | if (! bfd_set_section_flags (stdoutput, seg, flags)) | |
2499 | as_warn (_("error setting flags for \"%s\": %s"), | |
2500 | bfd_section_name (stdoutput, seg), | |
2501 | bfd_errmsg (bfd_get_error ())); | |
2502 | } | |
2503 | } | |
2504 | #endif | |
2505 | } | |
2506 | ||
2507 | /* Ignore the HP type. */ | |
2508 | if (*input_line_pointer == ',') | |
2509 | input_line_pointer += 2; | |
2510 | ||
2511 | demand_empty_rest_of_line (); | |
2512 | ||
2513 | #else /* ! TC_M68K */ | |
2514 | #ifdef TC_I960 | |
2515 | ||
2516 | char *name; | |
2517 | char c; | |
2518 | segT seg; | |
2519 | ||
2520 | SKIP_WHITESPACE (); | |
2521 | ||
2522 | name = input_line_pointer; | |
2523 | c = get_symbol_end (); | |
2524 | ||
2525 | name = xstrdup (name); | |
2526 | ||
2527 | *input_line_pointer = c; | |
2528 | ||
2529 | seg = subseg_new (name, 0); | |
2530 | ||
2531 | if (*input_line_pointer != ',') | |
2532 | *type = 'C'; | |
2533 | else | |
2534 | { | |
2535 | char *sectype; | |
2536 | ||
2537 | ++input_line_pointer; | |
2538 | SKIP_WHITESPACE (); | |
2539 | sectype = input_line_pointer; | |
2540 | c = get_symbol_end (); | |
2541 | if (*sectype == '\0') | |
2542 | *type = 'C'; | |
2543 | else if (strcasecmp (sectype, "text") == 0) | |
2544 | *type = 'C'; | |
2545 | else if (strcasecmp (sectype, "data") == 0) | |
2546 | *type = 'D'; | |
2547 | else if (strcasecmp (sectype, "romdata") == 0) | |
2548 | *type = 'R'; | |
2549 | else | |
2550 | as_warn (_("unrecognized section type `%s'"), sectype); | |
2551 | *input_line_pointer = c; | |
2552 | } | |
2553 | ||
2554 | if (*input_line_pointer == ',') | |
2555 | { | |
2556 | char *seccmd; | |
2557 | ||
2558 | ++input_line_pointer; | |
2559 | SKIP_WHITESPACE (); | |
2560 | seccmd = input_line_pointer; | |
2561 | c = get_symbol_end (); | |
2562 | if (strcasecmp (seccmd, "absolute") == 0) | |
2563 | { | |
2564 | as_bad (_("absolute sections are not supported")); | |
2565 | *input_line_pointer = c; | |
2566 | ignore_rest_of_line (); | |
2567 | return; | |
2568 | } | |
2569 | else if (strcasecmp (seccmd, "align") == 0) | |
2570 | { | |
2571 | int align; | |
2572 | ||
2573 | *input_line_pointer = c; | |
2574 | align = get_absolute_expression (); | |
2575 | record_alignment (seg, align); | |
2576 | } | |
2577 | else | |
2578 | { | |
2579 | as_warn (_("unrecognized section command `%s'"), seccmd); | |
2580 | *input_line_pointer = c; | |
2581 | } | |
2582 | } | |
2583 | ||
2584 | demand_empty_rest_of_line (); | |
2585 | ||
2586 | #else /* ! TC_I960 */ | |
2587 | /* The MRI assembler seems to use different forms of .sect for | |
2588 | different targets. */ | |
2589 | as_bad ("MRI mode not supported for this target"); | |
2590 | ignore_rest_of_line (); | |
2591 | #endif /* ! TC_I960 */ | |
2592 | #endif /* ! TC_M68K */ | |
2593 | } | |
2594 | ||
2595 | /* Handle the .print pseudo-op. */ | |
2596 | ||
2597 | void | |
2598 | s_print (ignore) | |
ab9da554 | 2599 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2600 | { |
2601 | char *s; | |
2602 | int len; | |
2603 | ||
2604 | s = demand_copy_C_string (&len); | |
2605 | printf ("%s\n", s); | |
2606 | demand_empty_rest_of_line (); | |
2607 | } | |
2608 | ||
2609 | /* Handle the .purgem pseudo-op. */ | |
2610 | ||
2611 | void | |
2612 | s_purgem (ignore) | |
ab9da554 | 2613 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2614 | { |
2615 | if (is_it_end_of_statement ()) | |
2616 | { | |
2617 | demand_empty_rest_of_line (); | |
2618 | return; | |
2619 | } | |
2620 | ||
2621 | do | |
2622 | { | |
2623 | char *name; | |
2624 | char c; | |
2625 | ||
2626 | SKIP_WHITESPACE (); | |
2627 | name = input_line_pointer; | |
2628 | c = get_symbol_end (); | |
2629 | delete_macro (name); | |
2630 | *input_line_pointer = c; | |
2631 | SKIP_WHITESPACE (); | |
2632 | } | |
2633 | while (*input_line_pointer++ == ','); | |
2634 | ||
2635 | --input_line_pointer; | |
2636 | demand_empty_rest_of_line (); | |
2637 | } | |
2638 | ||
2639 | /* Handle the .rept pseudo-op. */ | |
2640 | ||
2641 | void | |
2642 | s_rept (ignore) | |
ab9da554 | 2643 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
2644 | { |
2645 | int count; | |
252b5132 RH |
2646 | |
2647 | count = get_absolute_expression (); | |
2648 | ||
6dc19fc4 TW |
2649 | do_repeat(count, "REPT", "ENDR"); |
2650 | } | |
2651 | ||
2652 | /* This function provides a generic repeat block implementation. It allows | |
2653 | different directives to be used as the start/end keys. */ | |
2654 | ||
2655 | void | |
2656 | do_repeat (count, start, end) | |
2657 | int count; | |
2658 | const char *start; | |
2659 | const char *end; | |
2660 | { | |
2661 | sb one; | |
2662 | sb many; | |
2663 | ||
252b5132 | 2664 | sb_new (&one); |
6dc19fc4 | 2665 | if (! buffer_and_nest (start, end, &one, get_line_sb)) |
252b5132 | 2666 | { |
6dc19fc4 | 2667 | as_bad (_("%s without %s"), start, end); |
252b5132 RH |
2668 | return; |
2669 | } | |
2670 | ||
2671 | sb_new (&many); | |
2672 | while (count-- > 0) | |
2673 | sb_add_sb (&many, &one); | |
2674 | ||
2675 | sb_kill (&one); | |
2676 | ||
9f10757c | 2677 | input_scrub_include_sb (&many, input_line_pointer, 1); |
252b5132 RH |
2678 | sb_kill (&many); |
2679 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2680 | } | |
2681 | ||
6dc19fc4 TW |
2682 | /* Skip to end of current repeat loop; EXTRA indicates how many additional |
2683 | input buffers to skip. Assumes that conditionals preceding the loop end | |
2684 | are properly nested. | |
2685 | ||
2686 | This function makes it easier to implement a premature "break" out of the | |
2687 | loop. The EXTRA arg accounts for other buffers we might have inserted, | |
2688 | such as line substitutions. */ | |
2689 | ||
2690 | void | |
2691 | end_repeat (extra) | |
2692 | int extra; | |
2693 | { | |
2694 | cond_exit_macro (macro_nest); | |
2695 | while (extra-- >= 0) | |
2696 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
2697 | } | |
2698 | ||
252b5132 RH |
2699 | /* Handle the .equ, .equiv and .set directives. If EQUIV is 1, then |
2700 | this is .equiv, and it is an error if the symbol is already | |
2701 | defined. */ | |
2702 | ||
2703 | void | |
2704 | s_set (equiv) | |
2705 | int equiv; | |
2706 | { | |
2707 | register char *name; | |
2708 | register char delim; | |
2709 | register char *end_name; | |
2710 | register symbolS *symbolP; | |
2711 | ||
2712 | /* | |
2713 | * Especial apologies for the random logic: | |
2714 | * this just grew, and could be parsed much more simply! | |
2715 | * Dean in haste. | |
2716 | */ | |
2717 | name = input_line_pointer; | |
2718 | delim = get_symbol_end (); | |
2719 | end_name = input_line_pointer; | |
2720 | *end_name = delim; | |
2721 | SKIP_WHITESPACE (); | |
2722 | ||
2723 | if (*input_line_pointer != ',') | |
2724 | { | |
2725 | *end_name = 0; | |
2726 | as_bad (_("Expected comma after name \"%s\""), name); | |
2727 | *end_name = delim; | |
2728 | ignore_rest_of_line (); | |
2729 | return; | |
2730 | } | |
2731 | ||
2732 | input_line_pointer++; | |
2733 | *end_name = 0; | |
2734 | ||
2735 | if (name[0] == '.' && name[1] == '\0') | |
2736 | { | |
2737 | /* Turn '. = mumble' into a .org mumble */ | |
2738 | register segT segment; | |
2739 | expressionS exp; | |
2740 | ||
2741 | segment = get_known_segmented_expression (&exp); | |
2742 | ||
2743 | if (!need_pass_2) | |
2744 | do_org (segment, &exp, 0); | |
2745 | ||
2746 | *end_name = delim; | |
2747 | return; | |
2748 | } | |
2749 | ||
2750 | if ((symbolP = symbol_find (name)) == NULL | |
2751 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
2752 | { | |
2753 | #ifndef NO_LISTING | |
2754 | /* When doing symbol listings, play games with dummy fragments living | |
2755 | outside the normal fragment chain to record the file and line info | |
2756 | for this symbol. */ | |
2757 | if (listing & LISTING_SYMBOLS) | |
2758 | { | |
2759 | extern struct list_info_struct *listing_tail; | |
2760 | fragS *dummy_frag = (fragS *) xmalloc (sizeof(fragS)); | |
2761 | memset (dummy_frag, 0, sizeof(fragS)); | |
2762 | dummy_frag->fr_type = rs_fill; | |
2763 | dummy_frag->line = listing_tail; | |
2764 | symbolP = symbol_new (name, undefined_section, 0, dummy_frag); | |
2765 | dummy_frag->fr_symbol = symbolP; | |
2766 | } | |
2767 | else | |
2768 | #endif | |
2769 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); | |
2770 | ||
2771 | #ifdef OBJ_COFF | |
2772 | /* "set" symbols are local unless otherwise specified. */ | |
2773 | SF_SET_LOCAL (symbolP); | |
2774 | #endif /* OBJ_COFF */ | |
2775 | ||
2776 | } /* make a new symbol */ | |
2777 | ||
2778 | symbol_table_insert (symbolP); | |
2779 | ||
2780 | *end_name = delim; | |
2781 | ||
2782 | if (equiv | |
2783 | && S_IS_DEFINED (symbolP) | |
2784 | && S_GET_SEGMENT (symbolP) != reg_section) | |
2785 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
2786 | ||
2787 | pseudo_set (symbolP); | |
2788 | demand_empty_rest_of_line (); | |
2789 | } /* s_set() */ | |
2790 | ||
2791 | void | |
2792 | s_space (mult) | |
2793 | int mult; | |
2794 | { | |
2795 | expressionS exp; | |
2796 | expressionS val; | |
2797 | char *p = 0; | |
2798 | char *stop = NULL; | |
2799 | char stopc; | |
2800 | int bytes; | |
2801 | ||
2802 | #ifdef md_flush_pending_output | |
2803 | md_flush_pending_output (); | |
2804 | #endif | |
2805 | ||
2806 | if (flag_mri) | |
2807 | stop = mri_comment_field (&stopc); | |
2808 | ||
2809 | /* In m68k MRI mode, we need to align to a word boundary, unless | |
2810 | this is ds.b. */ | |
2811 | if (flag_m68k_mri && mult > 1) | |
2812 | { | |
2813 | if (now_seg == absolute_section) | |
2814 | { | |
2815 | abs_section_offset += abs_section_offset & 1; | |
2816 | if (line_label != NULL) | |
2817 | S_SET_VALUE (line_label, abs_section_offset); | |
2818 | } | |
2819 | else if (mri_common_symbol != NULL) | |
2820 | { | |
2821 | valueT val; | |
2822 | ||
2823 | val = S_GET_VALUE (mri_common_symbol); | |
2824 | if ((val & 1) != 0) | |
2825 | { | |
2826 | S_SET_VALUE (mri_common_symbol, val + 1); | |
2827 | if (line_label != NULL) | |
2828 | { | |
2b47531b ILT |
2829 | expressionS *symexp; |
2830 | ||
2831 | symexp = symbol_get_value_expression (line_label); | |
2832 | know (symexp->X_op == O_symbol); | |
2833 | know (symexp->X_add_symbol == mri_common_symbol); | |
2834 | symexp->X_add_number += 1; | |
252b5132 RH |
2835 | } |
2836 | } | |
2837 | } | |
2838 | else | |
2839 | { | |
2840 | do_align (1, (char *) NULL, 0, 0); | |
2841 | if (line_label != NULL) | |
2842 | { | |
2b47531b | 2843 | symbol_set_frag (line_label, frag_now); |
252b5132 RH |
2844 | S_SET_VALUE (line_label, frag_now_fix ()); |
2845 | } | |
2846 | } | |
2847 | } | |
2848 | ||
2849 | bytes = mult; | |
2850 | ||
2851 | expression (&exp); | |
2852 | ||
2853 | SKIP_WHITESPACE (); | |
2854 | if (*input_line_pointer == ',') | |
2855 | { | |
2856 | ++input_line_pointer; | |
2857 | expression (&val); | |
2858 | } | |
2859 | else | |
2860 | { | |
2861 | val.X_op = O_constant; | |
2862 | val.X_add_number = 0; | |
2863 | } | |
2864 | ||
2865 | if (val.X_op != O_constant | |
2866 | || val.X_add_number < - 0x80 | |
2867 | || val.X_add_number > 0xff | |
2868 | || (mult != 0 && mult != 1 && val.X_add_number != 0)) | |
2869 | { | |
2870 | if (exp.X_op != O_constant) | |
2871 | as_bad (_("Unsupported variable size or fill value")); | |
2872 | else | |
2873 | { | |
2874 | offsetT i; | |
2875 | ||
2876 | if (mult == 0) | |
2877 | mult = 1; | |
2878 | bytes = mult * exp.X_add_number; | |
2879 | for (i = 0; i < exp.X_add_number; i++) | |
2880 | emit_expr (&val, mult); | |
2881 | } | |
2882 | } | |
2883 | else | |
2884 | { | |
2885 | if (exp.X_op == O_constant) | |
2886 | { | |
2887 | long repeat; | |
2888 | ||
2889 | repeat = exp.X_add_number; | |
2890 | if (mult) | |
2891 | repeat *= mult; | |
2892 | bytes = repeat; | |
2893 | if (repeat <= 0) | |
2894 | { | |
2895 | if (! flag_mri) | |
2896 | as_warn (_(".space repeat count is zero, ignored")); | |
2897 | else if (repeat < 0) | |
2898 | as_warn (_(".space repeat count is negative, ignored")); | |
2899 | goto getout; | |
2900 | } | |
2901 | ||
2902 | /* If we are in the absolute section, just bump the offset. */ | |
2903 | if (now_seg == absolute_section) | |
2904 | { | |
2905 | abs_section_offset += repeat; | |
2906 | goto getout; | |
2907 | } | |
2908 | ||
2909 | /* If we are secretly in an MRI common section, then | |
2910 | creating space just increases the size of the common | |
2911 | symbol. */ | |
2912 | if (mri_common_symbol != NULL) | |
2913 | { | |
2914 | S_SET_VALUE (mri_common_symbol, | |
2915 | S_GET_VALUE (mri_common_symbol) + repeat); | |
2916 | goto getout; | |
2917 | } | |
2918 | ||
2919 | if (!need_pass_2) | |
2920 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
2921 | (offsetT) repeat, (char *) 0); | |
2922 | } | |
2923 | else | |
2924 | { | |
2925 | if (now_seg == absolute_section) | |
2926 | { | |
2927 | as_bad (_("space allocation too complex in absolute section")); | |
2928 | subseg_set (text_section, 0); | |
2929 | } | |
2930 | if (mri_common_symbol != NULL) | |
2931 | { | |
2932 | as_bad (_("space allocation too complex in common section")); | |
2933 | mri_common_symbol = NULL; | |
2934 | } | |
2935 | if (!need_pass_2) | |
2936 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, | |
2937 | make_expr_symbol (&exp), (offsetT) 0, (char *) 0); | |
2938 | } | |
2939 | ||
2940 | if (p) | |
2941 | *p = val.X_add_number; | |
2942 | } | |
2943 | ||
2944 | getout: | |
2945 | ||
2946 | /* In MRI mode, after an odd number of bytes, we must align to an | |
2947 | even word boundary, unless the next instruction is a dc.b, ds.b | |
2948 | or dcb.b. */ | |
2949 | if (flag_mri && (bytes & 1) != 0) | |
2950 | mri_pending_align = 1; | |
2951 | ||
2952 | demand_empty_rest_of_line (); | |
2953 | ||
2954 | if (flag_mri) | |
2955 | mri_comment_end (stop, stopc); | |
2956 | } | |
2957 | ||
2958 | /* This is like s_space, but the value is a floating point number with | |
2959 | the given precision. This is for the MRI dcb.s pseudo-op and | |
2960 | friends. */ | |
2961 | ||
2962 | void | |
2963 | s_float_space (float_type) | |
2964 | int float_type; | |
2965 | { | |
2966 | offsetT count; | |
2967 | int flen; | |
2968 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
2969 | char *stop = NULL; | |
2970 | char stopc; | |
2971 | ||
2972 | if (flag_mri) | |
2973 | stop = mri_comment_field (&stopc); | |
2974 | ||
2975 | count = get_absolute_expression (); | |
2976 | ||
2977 | SKIP_WHITESPACE (); | |
2978 | if (*input_line_pointer != ',') | |
2979 | { | |
2980 | as_bad (_("missing value")); | |
2981 | ignore_rest_of_line (); | |
2982 | if (flag_mri) | |
2983 | mri_comment_end (stop, stopc); | |
2984 | return; | |
2985 | } | |
2986 | ||
2987 | ++input_line_pointer; | |
2988 | ||
2989 | SKIP_WHITESPACE (); | |
2990 | ||
2991 | /* Skip any 0{letter} that may be present. Don't even check if the | |
2992 | * letter is legal. */ | |
2993 | if (input_line_pointer[0] == '0' | |
2994 | && isalpha ((unsigned char) input_line_pointer[1])) | |
2995 | input_line_pointer += 2; | |
2996 | ||
2997 | /* Accept :xxxx, where the x's are hex digits, for a floating point | |
2998 | with the exact digits specified. */ | |
2999 | if (input_line_pointer[0] == ':') | |
3000 | { | |
3001 | flen = hex_float (float_type, temp); | |
3002 | if (flen < 0) | |
3003 | { | |
3004 | ignore_rest_of_line (); | |
3005 | if (flag_mri) | |
3006 | mri_comment_end (stop, stopc); | |
3007 | return; | |
3008 | } | |
3009 | } | |
3010 | else | |
3011 | { | |
3012 | char *err; | |
3013 | ||
3014 | err = md_atof (float_type, temp, &flen); | |
3015 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
3016 | know (flen > 0); | |
3017 | if (err) | |
3018 | { | |
3019 | as_bad (_("Bad floating literal: %s"), err); | |
3020 | ignore_rest_of_line (); | |
3021 | if (flag_mri) | |
3022 | mri_comment_end (stop, stopc); | |
3023 | return; | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | while (--count >= 0) | |
3028 | { | |
3029 | char *p; | |
3030 | ||
3031 | p = frag_more (flen); | |
3032 | memcpy (p, temp, (unsigned int) flen); | |
3033 | } | |
3034 | ||
3035 | demand_empty_rest_of_line (); | |
3036 | ||
3037 | if (flag_mri) | |
3038 | mri_comment_end (stop, stopc); | |
3039 | } | |
3040 | ||
3041 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ | |
3042 | ||
3043 | void | |
3044 | s_struct (ignore) | |
ab9da554 | 3045 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
3046 | { |
3047 | char *stop = NULL; | |
3048 | char stopc; | |
3049 | ||
3050 | if (flag_mri) | |
3051 | stop = mri_comment_field (&stopc); | |
3052 | abs_section_offset = get_absolute_expression (); | |
3053 | subseg_set (absolute_section, 0); | |
3054 | demand_empty_rest_of_line (); | |
3055 | if (flag_mri) | |
3056 | mri_comment_end (stop, stopc); | |
3057 | } | |
3058 | ||
3059 | void | |
3060 | s_text (ignore) | |
ab9da554 | 3061 | int ignore ATTRIBUTE_UNUSED; |
252b5132 RH |
3062 | { |
3063 | register int temp; | |
3064 | ||
3065 | temp = get_absolute_expression (); | |
3066 | subseg_set (text_section, (subsegT) temp); | |
3067 | demand_empty_rest_of_line (); | |
3068 | #ifdef OBJ_VMS | |
3069 | const_flag &= ~IN_DEFAULT_SECTION; | |
3070 | #endif | |
3071 | } /* s_text() */ | |
3072 | \f | |
3073 | ||
3074 | void | |
3075 | demand_empty_rest_of_line () | |
3076 | { | |
3077 | SKIP_WHITESPACE (); | |
3078 | if (is_end_of_line[(unsigned char) *input_line_pointer]) | |
3079 | { | |
3080 | input_line_pointer++; | |
3081 | } | |
3082 | else | |
3083 | { | |
3084 | ignore_rest_of_line (); | |
3085 | } | |
3086 | /* Return having already swallowed end-of-line. */ | |
3087 | } /* Return pointing just after end-of-line. */ | |
3088 | ||
3089 | void | |
3090 | ignore_rest_of_line () /* For suspect lines: gives warning. */ | |
3091 | { | |
3092 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
3093 | { | |
3094 | if (isprint ((unsigned char) *input_line_pointer)) | |
3095 | as_bad (_("Rest of line ignored. First ignored character is `%c'."), | |
3096 | *input_line_pointer); | |
3097 | else | |
3098 | as_bad (_("Rest of line ignored. First ignored character valued 0x%x."), | |
3099 | *input_line_pointer); | |
3100 | while (input_line_pointer < buffer_limit | |
3101 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3102 | { | |
3103 | input_line_pointer++; | |
3104 | } | |
3105 | } | |
3106 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3107 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3108 | } | |
3109 | ||
3110 | void | |
3111 | discard_rest_of_line () | |
3112 | { | |
3113 | while (input_line_pointer < buffer_limit | |
3114 | && !is_end_of_line[(unsigned char) *input_line_pointer]) | |
3115 | { | |
3116 | input_line_pointer++; | |
3117 | } | |
3118 | input_line_pointer++; /* Return pointing just after end-of-line. */ | |
3119 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); | |
3120 | } | |
3121 | ||
3122 | /* | |
3123 | * pseudo_set() | |
3124 | * | |
3125 | * In: Pointer to a symbol. | |
3126 | * Input_line_pointer->expression. | |
3127 | * | |
3128 | * Out: Input_line_pointer->just after any whitespace after expression. | |
3129 | * Tried to set symbol to value of expression. | |
3130 | * Will change symbols type, value, and frag; | |
3131 | */ | |
3132 | void | |
3133 | pseudo_set (symbolP) | |
3134 | symbolS *symbolP; | |
3135 | { | |
3136 | expressionS exp; | |
3137 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3138 | int ext; | |
3139 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3140 | ||
3141 | know (symbolP); /* NULL pointer is logic error. */ | |
3142 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3143 | ext = S_IS_EXTERNAL (symbolP); | |
3144 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3145 | ||
3146 | (void) expression (&exp); | |
3147 | ||
3148 | if (exp.X_op == O_illegal) | |
3149 | as_bad (_("illegal expression; zero assumed")); | |
3150 | else if (exp.X_op == O_absent) | |
3151 | as_bad (_("missing expression; zero assumed")); | |
3152 | else if (exp.X_op == O_big) | |
3153 | { | |
3154 | if (exp.X_add_number > 0) | |
3155 | as_bad (_("bignum invalid; zero assumed")); | |
3156 | else | |
3157 | as_bad (_("floating point number invalid; zero assumed")); | |
3158 | } | |
3159 | else if (exp.X_op == O_subtract | |
3160 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
3161 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
3162 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
2b47531b ILT |
3163 | && (symbol_get_frag (exp.X_add_symbol) |
3164 | == symbol_get_frag (exp.X_op_symbol))) | |
252b5132 RH |
3165 | { |
3166 | exp.X_op = O_constant; | |
3167 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
3168 | - S_GET_VALUE (exp.X_op_symbol)); | |
3169 | } | |
3170 | ||
3171 | switch (exp.X_op) | |
3172 | { | |
3173 | case O_illegal: | |
3174 | case O_absent: | |
3175 | case O_big: | |
3176 | exp.X_add_number = 0; | |
3177 | /* Fall through. */ | |
3178 | case O_constant: | |
3179 | S_SET_SEGMENT (symbolP, absolute_section); | |
3180 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3181 | if (ext) | |
3182 | S_SET_EXTERNAL (symbolP); | |
3183 | else | |
3184 | S_CLEAR_EXTERNAL (symbolP); | |
3185 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3186 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
3187 | if (exp.X_op != O_constant) | |
2b47531b | 3188 | symbol_set_frag (symbolP, &zero_address_frag); |
252b5132 RH |
3189 | break; |
3190 | ||
3191 | case O_register: | |
3192 | S_SET_SEGMENT (symbolP, reg_section); | |
3193 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
2b47531b | 3194 | symbol_set_frag (symbolP, &zero_address_frag); |
252b5132 RH |
3195 | break; |
3196 | ||
3197 | case O_symbol: | |
3198 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section | |
3199 | || exp.X_add_number != 0) | |
2b47531b | 3200 | symbol_set_value_expression (symbolP, &exp); |
53b0d397 ILT |
3201 | else if (symbol_section_p (symbolP)) |
3202 | as_bad ("invalid attempt to set value of section symbol"); | |
252b5132 RH |
3203 | else |
3204 | { | |
3205 | symbolS *s = exp.X_add_symbol; | |
3206 | ||
3207 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); | |
3208 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) | |
3209 | if (ext) | |
3210 | S_SET_EXTERNAL (symbolP); | |
3211 | else | |
3212 | S_CLEAR_EXTERNAL (symbolP); | |
3213 | #endif /* OBJ_AOUT or OBJ_BOUT */ | |
3214 | S_SET_VALUE (symbolP, | |
3215 | exp.X_add_number + S_GET_VALUE (s)); | |
2b47531b | 3216 | symbol_set_frag (symbolP, symbol_get_frag (s)); |
252b5132 RH |
3217 | copy_symbol_attributes (symbolP, s); |
3218 | } | |
3219 | break; | |
3220 | ||
3221 | default: | |
3222 | /* The value is some complex expression. | |
3223 | FIXME: Should we set the segment to anything? */ | |
2b47531b | 3224 | symbol_set_value_expression (symbolP, &exp); |
252b5132 RH |
3225 | break; |
3226 | } | |
3227 | } | |
3228 | \f | |
3229 | /* | |
3230 | * cons() | |
3231 | * | |
3232 | * CONStruct more frag of .bytes, or .words etc. | |
3233 | * Should need_pass_2 be 1 then emit no frag(s). | |
3234 | * This understands EXPRESSIONS. | |
3235 | * | |
3236 | * Bug (?) | |
3237 | * | |
3238 | * This has a split personality. We use expression() to read the | |
3239 | * value. We can detect if the value won't fit in a byte or word. | |
3240 | * But we can't detect if expression() discarded significant digits | |
3241 | * in the case of a long. Not worth the crocks required to fix it. | |
3242 | */ | |
3243 | ||
3244 | /* Select a parser for cons expressions. */ | |
3245 | ||
3246 | /* Some targets need to parse the expression in various fancy ways. | |
3247 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
3248 | (for example, the HPPA does this). Otherwise, you can define | |
3249 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
3250 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
3251 | are defined, which is the normal case, then only simple expressions | |
3252 | are permitted. */ | |
3253 | ||
abd63a32 | 3254 | #ifdef TC_M68K |
252b5132 RH |
3255 | static void |
3256 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
abd63a32 | 3257 | #endif |
252b5132 RH |
3258 | |
3259 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3260 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3261 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
3262 | static void | |
3263 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3264 | #endif | |
3265 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3266 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
3267 | static void | |
3268 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
3269 | #endif | |
3270 | ||
3271 | /* If we haven't gotten one yet, just call expression. */ | |
3272 | #ifndef TC_PARSE_CONS_EXPRESSION | |
3273 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
3274 | #endif | |
3275 | #endif | |
3276 | ||
3277 | /* worker to do .byte etc statements */ | |
3278 | /* clobbers input_line_pointer, checks */ | |
3279 | /* end-of-line. */ | |
3280 | static void | |
3281 | cons_worker (nbytes, rva) | |
3282 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ | |
3283 | int rva; | |
3284 | { | |
3285 | int c; | |
3286 | expressionS exp; | |
3287 | char *stop = NULL; | |
3288 | char stopc; | |
3289 | ||
3290 | #ifdef md_flush_pending_output | |
3291 | md_flush_pending_output (); | |
3292 | #endif | |
3293 | ||
3294 | if (flag_mri) | |
3295 | stop = mri_comment_field (&stopc); | |
3296 | ||
3297 | if (is_it_end_of_statement ()) | |
3298 | { | |
3299 | demand_empty_rest_of_line (); | |
3300 | if (flag_mri) | |
3301 | mri_comment_end (stop, stopc); | |
3302 | return; | |
3303 | } | |
3304 | ||
3305 | #ifdef md_cons_align | |
3306 | md_cons_align (nbytes); | |
3307 | #endif | |
3308 | ||
3309 | c = 0; | |
3310 | do | |
3311 | { | |
abd63a32 | 3312 | #ifdef TC_M68K |
252b5132 RH |
3313 | if (flag_m68k_mri) |
3314 | parse_mri_cons (&exp, (unsigned int) nbytes); | |
3315 | else | |
abd63a32 | 3316 | #endif |
252b5132 RH |
3317 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); |
3318 | ||
3319 | if (rva) | |
3320 | { | |
3321 | if (exp.X_op == O_symbol) | |
3322 | exp.X_op = O_symbol_rva; | |
3323 | else | |
3324 | as_fatal (_("rva without symbol")); | |
3325 | } | |
3326 | emit_expr (&exp, (unsigned int) nbytes); | |
3327 | ++c; | |
3328 | } | |
3329 | while (*input_line_pointer++ == ','); | |
3330 | ||
3331 | /* In MRI mode, after an odd number of bytes, we must align to an | |
3332 | even word boundary, unless the next instruction is a dc.b, ds.b | |
3333 | or dcb.b. */ | |
3334 | if (flag_mri && nbytes == 1 && (c & 1) != 0) | |
3335 | mri_pending_align = 1; | |
3336 | ||
3337 | input_line_pointer--; /* Put terminator back into stream. */ | |
3338 | ||
3339 | demand_empty_rest_of_line (); | |
3340 | ||
3341 | if (flag_mri) | |
3342 | mri_comment_end (stop, stopc); | |
3343 | } | |
3344 | ||
3345 | ||
3346 | void | |
3347 | cons (size) | |
3348 | int size; | |
3349 | { | |
3350 | cons_worker (size, 0); | |
3351 | } | |
3352 | ||
3353 | void | |
3354 | s_rva (size) | |
3355 | int size; | |
3356 | { | |
3357 | cons_worker (size, 1); | |
3358 | } | |
3359 | ||
3360 | /* Put the contents of expression EXP into the object file using | |
3361 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
3362 | ||
3363 | void | |
3364 | emit_expr (exp, nbytes) | |
3365 | expressionS *exp; | |
3366 | unsigned int nbytes; | |
3367 | { | |
3368 | operatorT op; | |
3369 | register char *p; | |
3370 | valueT extra_digit = 0; | |
3371 | ||
3372 | /* Don't do anything if we are going to make another pass. */ | |
3373 | if (need_pass_2) | |
3374 | return; | |
3375 | ||
3376 | #ifndef NO_LISTING | |
3377 | #ifdef OBJ_ELF | |
3378 | /* When gcc emits DWARF 1 debugging pseudo-ops, a line number will | |
3379 | appear as a four byte positive constant in the .line section, | |
3380 | followed by a 2 byte 0xffff. Look for that case here. */ | |
3381 | { | |
3382 | static int dwarf_line = -1; | |
3383 | ||
3384 | if (strcmp (segment_name (now_seg), ".line") != 0) | |
3385 | dwarf_line = -1; | |
3386 | else if (dwarf_line >= 0 | |
3387 | && nbytes == 2 | |
3388 | && exp->X_op == O_constant | |
3389 | && (exp->X_add_number == -1 || exp->X_add_number == 0xffff)) | |
3390 | listing_source_line ((unsigned int) dwarf_line); | |
3391 | else if (nbytes == 4 | |
3392 | && exp->X_op == O_constant | |
3393 | && exp->X_add_number >= 0) | |
3394 | dwarf_line = exp->X_add_number; | |
3395 | else | |
3396 | dwarf_line = -1; | |
3397 | } | |
3398 | ||
3399 | /* When gcc emits DWARF 1 debugging pseudo-ops, a file name will | |
3400 | appear as a 2 byte TAG_compile_unit (0x11) followed by a 2 byte | |
3401 | AT_sibling (0x12) followed by a four byte address of the sibling | |
3402 | followed by a 2 byte AT_name (0x38) followed by the name of the | |
3403 | file. We look for that case here. */ | |
3404 | { | |
3405 | static int dwarf_file = 0; | |
3406 | ||
3407 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
3408 | dwarf_file = 0; | |
3409 | else if (dwarf_file == 0 | |
3410 | && nbytes == 2 | |
3411 | && exp->X_op == O_constant | |
3412 | && exp->X_add_number == 0x11) | |
3413 | dwarf_file = 1; | |
3414 | else if (dwarf_file == 1 | |
3415 | && nbytes == 2 | |
3416 | && exp->X_op == O_constant | |
3417 | && exp->X_add_number == 0x12) | |
3418 | dwarf_file = 2; | |
3419 | else if (dwarf_file == 2 | |
3420 | && nbytes == 4) | |
3421 | dwarf_file = 3; | |
3422 | else if (dwarf_file == 3 | |
3423 | && nbytes == 2 | |
3424 | && exp->X_op == O_constant | |
3425 | && exp->X_add_number == 0x38) | |
3426 | dwarf_file = 4; | |
3427 | else | |
3428 | dwarf_file = 0; | |
3429 | ||
3430 | /* The variable dwarf_file_string tells stringer that the string | |
3431 | may be the name of the source file. */ | |
3432 | if (dwarf_file == 4) | |
3433 | dwarf_file_string = 1; | |
3434 | else | |
3435 | dwarf_file_string = 0; | |
3436 | } | |
3437 | #endif | |
3438 | #endif | |
3439 | ||
3440 | if (check_eh_frame (exp, &nbytes)) | |
3441 | return; | |
3442 | ||
3443 | op = exp->X_op; | |
3444 | ||
3445 | /* Allow `.word 0' in the absolute section. */ | |
3446 | if (now_seg == absolute_section) | |
3447 | { | |
3448 | if (op != O_constant || exp->X_add_number != 0) | |
3449 | as_bad (_("attempt to store value in absolute section")); | |
3450 | abs_section_offset += nbytes; | |
3451 | return; | |
3452 | } | |
3453 | ||
3454 | /* Handle a negative bignum. */ | |
3455 | if (op == O_uminus | |
3456 | && exp->X_add_number == 0 | |
2b47531b ILT |
3457 | && symbol_get_value_expression (exp->X_add_symbol)->X_op == O_big |
3458 | && symbol_get_value_expression (exp->X_add_symbol)->X_add_number > 0) | |
252b5132 RH |
3459 | { |
3460 | int i; | |
3461 | unsigned long carry; | |
3462 | ||
2b47531b | 3463 | exp = symbol_get_value_expression (exp->X_add_symbol); |
252b5132 RH |
3464 | |
3465 | /* Negate the bignum: one's complement each digit and add 1. */ | |
3466 | carry = 1; | |
3467 | for (i = 0; i < exp->X_add_number; i++) | |
3468 | { | |
3469 | unsigned long next; | |
3470 | ||
3471 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
3472 | & LITTLENUM_MASK) | |
3473 | + carry); | |
3474 | generic_bignum[i] = next & LITTLENUM_MASK; | |
3475 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
3476 | } | |
3477 | ||
3478 | /* We can ignore any carry out, because it will be handled by | |
3479 | extra_digit if it is needed. */ | |
3480 | ||
3481 | extra_digit = (valueT) -1; | |
3482 | op = O_big; | |
3483 | } | |
3484 | ||
3485 | if (op == O_absent || op == O_illegal) | |
3486 | { | |
3487 | as_warn (_("zero assumed for missing expression")); | |
3488 | exp->X_add_number = 0; | |
3489 | op = O_constant; | |
3490 | } | |
3491 | else if (op == O_big && exp->X_add_number <= 0) | |
3492 | { | |
3493 | as_bad (_("floating point number invalid; zero assumed")); | |
3494 | exp->X_add_number = 0; | |
3495 | op = O_constant; | |
3496 | } | |
3497 | else if (op == O_register) | |
3498 | { | |
3499 | as_warn (_("register value used as expression")); | |
3500 | op = O_constant; | |
3501 | } | |
3502 | ||
3503 | p = frag_more ((int) nbytes); | |
3504 | ||
3505 | #ifndef WORKING_DOT_WORD | |
3506 | /* If we have the difference of two symbols in a word, save it on | |
3507 | the broken_words list. See the code in write.c. */ | |
3508 | if (op == O_subtract && nbytes == 2) | |
3509 | { | |
3510 | struct broken_word *x; | |
3511 | ||
3512 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
3513 | x->next_broken_word = broken_words; | |
3514 | broken_words = x; | |
3515 | x->seg = now_seg; | |
3516 | x->subseg = now_subseg; | |
3517 | x->frag = frag_now; | |
3518 | x->word_goes_here = p; | |
3519 | x->dispfrag = 0; | |
3520 | x->add = exp->X_add_symbol; | |
3521 | x->sub = exp->X_op_symbol; | |
3522 | x->addnum = exp->X_add_number; | |
3523 | x->added = 0; | |
3524 | new_broken_words++; | |
3525 | return; | |
3526 | } | |
3527 | #endif | |
3528 | ||
3529 | /* If we have an integer, but the number of bytes is too large to | |
3530 | pass to md_number_to_chars, handle it as a bignum. */ | |
3531 | if (op == O_constant && nbytes > sizeof (valueT)) | |
3532 | { | |
3533 | valueT val; | |
3534 | int gencnt; | |
3535 | ||
3536 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
3537 | extra_digit = (valueT) -1; | |
3538 | val = (valueT) exp->X_add_number; | |
3539 | gencnt = 0; | |
3540 | do | |
3541 | { | |
3542 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
3543 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
3544 | ++gencnt; | |
3545 | } | |
3546 | while (val != 0); | |
3547 | op = exp->X_op = O_big; | |
3548 | exp->X_add_number = gencnt; | |
3549 | } | |
3550 | ||
3551 | if (op == O_constant) | |
3552 | { | |
3553 | register valueT get; | |
3554 | register valueT use; | |
3555 | register valueT mask; | |
3556 | valueT hibit; | |
3557 | register valueT unmask; | |
3558 | ||
3559 | /* JF << of >= number of bits in the object is undefined. In | |
3560 | particular SPARC (Sun 4) has problems */ | |
3561 | if (nbytes >= sizeof (valueT)) | |
3562 | { | |
3563 | mask = 0; | |
3564 | if (nbytes > sizeof (valueT)) | |
3565 | hibit = 0; | |
3566 | else | |
3567 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3568 | } | |
3569 | else | |
3570 | { | |
3571 | /* Don't store these bits. */ | |
3572 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); | |
3573 | hibit = (valueT) 1 << (nbytes * BITS_PER_CHAR - 1); | |
3574 | } | |
3575 | ||
3576 | unmask = ~mask; /* Do store these bits. */ | |
3577 | ||
3578 | #ifdef NEVER | |
3579 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
3580 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
3581 | #endif | |
3582 | ||
3583 | get = exp->X_add_number; | |
3584 | use = get & unmask; | |
3585 | if ((get & mask) != 0 | |
3586 | && ((get & mask) != mask | |
3587 | || (get & hibit) == 0)) | |
3588 | { /* Leading bits contain both 0s & 1s. */ | |
3589 | as_warn (_("Value 0x%lx truncated to 0x%lx."), | |
3590 | (unsigned long) get, (unsigned long) use); | |
3591 | } | |
3592 | /* put bytes in right order. */ | |
3593 | md_number_to_chars (p, use, (int) nbytes); | |
3594 | } | |
3595 | else if (op == O_big) | |
3596 | { | |
3597 | unsigned int size; | |
3598 | LITTLENUM_TYPE *nums; | |
3599 | ||
3600 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
3601 | ||
3602 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
3603 | if (nbytes < size) | |
3604 | { | |
3605 | as_warn (_("Bignum truncated to %d bytes"), nbytes); | |
3606 | size = nbytes; | |
3607 | } | |
3608 | ||
3609 | if (target_big_endian) | |
3610 | { | |
3611 | while (nbytes > size) | |
3612 | { | |
3613 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3614 | nbytes -= CHARS_PER_LITTLENUM; | |
3615 | p += CHARS_PER_LITTLENUM; | |
3616 | } | |
3617 | ||
3618 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
3619 | while (size > 0) | |
3620 | { | |
3621 | --nums; | |
3622 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3623 | size -= CHARS_PER_LITTLENUM; | |
3624 | p += CHARS_PER_LITTLENUM; | |
3625 | } | |
3626 | } | |
3627 | else | |
3628 | { | |
3629 | nums = generic_bignum; | |
3630 | while (size > 0) | |
3631 | { | |
3632 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
3633 | ++nums; | |
3634 | size -= CHARS_PER_LITTLENUM; | |
3635 | p += CHARS_PER_LITTLENUM; | |
3636 | nbytes -= CHARS_PER_LITTLENUM; | |
3637 | } | |
3638 | ||
3639 | while (nbytes > 0) | |
3640 | { | |
3641 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
3642 | nbytes -= CHARS_PER_LITTLENUM; | |
3643 | p += CHARS_PER_LITTLENUM; | |
3644 | } | |
3645 | } | |
3646 | } | |
3647 | else | |
3648 | { | |
3649 | memset (p, 0, nbytes); | |
3650 | ||
3651 | /* Now we need to generate a fixS to record the symbol value. | |
3652 | This is easy for BFD. For other targets it can be more | |
3653 | complex. For very complex cases (currently, the HPPA and | |
3654 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
3655 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
3656 | the name of the reloc code that should be stored in the fixS. | |
3657 | If neither is defined, the code uses NO_RELOC if it is | |
3658 | defined, and otherwise uses 0. */ | |
3659 | ||
3660 | #ifdef BFD_ASSEMBLER | |
3661 | #ifdef TC_CONS_FIX_NEW | |
3662 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3663 | #else | |
3664 | { | |
3665 | bfd_reloc_code_real_type r; | |
3666 | ||
3667 | switch (nbytes) | |
3668 | { | |
3669 | case 1: | |
3670 | r = BFD_RELOC_8; | |
3671 | break; | |
3672 | case 2: | |
3673 | r = BFD_RELOC_16; | |
3674 | break; | |
3675 | case 4: | |
3676 | r = BFD_RELOC_32; | |
3677 | break; | |
3678 | case 8: | |
3679 | r = BFD_RELOC_64; | |
3680 | break; | |
3681 | default: | |
3682 | as_bad (_("unsupported BFD relocation size %u"), nbytes); | |
3683 | r = BFD_RELOC_32; | |
3684 | break; | |
3685 | } | |
3686 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, | |
3687 | 0, r); | |
3688 | } | |
3689 | #endif | |
3690 | #else | |
3691 | #ifdef TC_CONS_FIX_NEW | |
3692 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
3693 | #else | |
3694 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
3695 | it is defined, otherwise use NO_RELOC if it is defined, | |
3696 | otherwise use 0. */ | |
3697 | #ifndef TC_CONS_RELOC | |
3698 | #ifdef NO_RELOC | |
3699 | #define TC_CONS_RELOC NO_RELOC | |
3700 | #else | |
3701 | #define TC_CONS_RELOC 0 | |
3702 | #endif | |
3703 | #endif | |
3704 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, | |
3705 | TC_CONS_RELOC); | |
3706 | #endif /* TC_CONS_FIX_NEW */ | |
3707 | #endif /* BFD_ASSEMBLER */ | |
3708 | } | |
3709 | } | |
3710 | \f | |
3711 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
3712 | ||
3713 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as | |
3714 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
3715 | then pack them all together. We do a little better in that we allow | |
3716 | them in words, longs, etc. and we'll pack them in target byte order | |
3717 | for you. | |
3718 | ||
3719 | The rules are: pack least significat bit first, if a field doesn't | |
3720 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
3721 | explicitly *not* even a warning. The bitwidth should be considered | |
3722 | a "mask". | |
3723 | ||
3724 | To use this function the tc-XXX.h file should define | |
3725 | BITFIELD_CONS_EXPRESSIONS. */ | |
3726 | ||
3727 | static void | |
3728 | parse_bitfield_cons (exp, nbytes) | |
3729 | expressionS *exp; | |
3730 | unsigned int nbytes; | |
3731 | { | |
3732 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
3733 | char *hold = input_line_pointer; | |
3734 | ||
3735 | (void) expression (exp); | |
3736 | ||
3737 | if (*input_line_pointer == ':') | |
3738 | { /* bitfields */ | |
3739 | long value = 0; | |
3740 | ||
3741 | for (;;) | |
3742 | { | |
3743 | unsigned long width; | |
3744 | ||
3745 | if (*input_line_pointer != ':') | |
3746 | { | |
3747 | input_line_pointer = hold; | |
3748 | break; | |
3749 | } /* next piece is not a bitfield */ | |
3750 | ||
3751 | /* In the general case, we can't allow | |
3752 | full expressions with symbol | |
3753 | differences and such. The relocation | |
3754 | entries for symbols not defined in this | |
3755 | assembly would require arbitrary field | |
3756 | widths, positions, and masks which most | |
3757 | of our current object formats don't | |
3758 | support. | |
3759 | ||
3760 | In the specific case where a symbol | |
3761 | *is* defined in this assembly, we | |
3762 | *could* build fixups and track it, but | |
3763 | this could lead to confusion for the | |
3764 | backends. I'm lazy. I'll take any | |
3765 | SEG_ABSOLUTE. I think that means that | |
3766 | you can use a previous .set or | |
3767 | .equ type symbol. xoxorich. */ | |
3768 | ||
3769 | if (exp->X_op == O_absent) | |
3770 | { | |
3771 | as_warn (_("using a bit field width of zero")); | |
3772 | exp->X_add_number = 0; | |
3773 | exp->X_op = O_constant; | |
3774 | } /* implied zero width bitfield */ | |
3775 | ||
3776 | if (exp->X_op != O_constant) | |
3777 | { | |
3778 | *input_line_pointer = '\0'; | |
3779 | as_bad (_("field width \"%s\" too complex for a bitfield"), hold); | |
3780 | *input_line_pointer = ':'; | |
3781 | demand_empty_rest_of_line (); | |
3782 | return; | |
3783 | } /* too complex */ | |
3784 | ||
3785 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
3786 | { | |
3787 | as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"), | |
3788 | width, nbytes, (BITS_PER_CHAR * nbytes)); | |
3789 | width = BITS_PER_CHAR * nbytes; | |
3790 | } /* too big */ | |
3791 | ||
3792 | if (width > bits_available) | |
3793 | { | |
3794 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ | |
3795 | input_line_pointer = hold; | |
3796 | exp->X_add_number = value; | |
3797 | break; | |
3798 | } /* won't fit */ | |
3799 | ||
3800 | hold = ++input_line_pointer; /* skip ':' */ | |
3801 | ||
3802 | (void) expression (exp); | |
3803 | if (exp->X_op != O_constant) | |
3804 | { | |
3805 | char cache = *input_line_pointer; | |
3806 | ||
3807 | *input_line_pointer = '\0'; | |
3808 | as_bad (_("field value \"%s\" too complex for a bitfield"), hold); | |
3809 | *input_line_pointer = cache; | |
3810 | demand_empty_rest_of_line (); | |
3811 | return; | |
3812 | } /* too complex */ | |
3813 | ||
3814 | value |= ((~(-1 << width) & exp->X_add_number) | |
3815 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
3816 | ||
3817 | if ((bits_available -= width) == 0 | |
3818 | || is_it_end_of_statement () | |
3819 | || *input_line_pointer != ',') | |
3820 | { | |
3821 | break; | |
3822 | } /* all the bitfields we're gonna get */ | |
3823 | ||
3824 | hold = ++input_line_pointer; | |
3825 | (void) expression (exp); | |
3826 | } /* forever loop */ | |
3827 | ||
3828 | exp->X_add_number = value; | |
3829 | exp->X_op = O_constant; | |
3830 | exp->X_unsigned = 1; | |
3831 | } /* if looks like a bitfield */ | |
3832 | } /* parse_bitfield_cons() */ | |
3833 | ||
3834 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
3835 | \f | |
3836 | /* Handle an MRI style string expression. */ | |
3837 | ||
abd63a32 | 3838 | #ifdef TC_M68K |
252b5132 RH |
3839 | static void |
3840 | parse_mri_cons (exp, nbytes) | |
3841 | expressionS *exp; | |
3842 | unsigned int nbytes; | |
3843 | { | |
3844 | if (*input_line_pointer != '\'' | |
3845 | && (input_line_pointer[1] != '\'' | |
3846 | || (*input_line_pointer != 'A' | |
3847 | && *input_line_pointer != 'E'))) | |
3848 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); | |
3849 | else | |
3850 | { | |
3851 | unsigned int scan; | |
3852 | unsigned int result = 0; | |
3853 | ||
3854 | /* An MRI style string. Cut into as many bytes as will fit into | |
3855 | a nbyte chunk, left justify if necessary, and separate with | |
3856 | commas so we can try again later. */ | |
3857 | if (*input_line_pointer == 'A') | |
3858 | ++input_line_pointer; | |
3859 | else if (*input_line_pointer == 'E') | |
3860 | { | |
3861 | as_bad (_("EBCDIC constants are not supported")); | |
3862 | ++input_line_pointer; | |
3863 | } | |
3864 | ||
3865 | input_line_pointer++; | |
3866 | for (scan = 0; scan < nbytes; scan++) | |
3867 | { | |
3868 | if (*input_line_pointer == '\'') | |
3869 | { | |
3870 | if (input_line_pointer[1] == '\'') | |
3871 | { | |
3872 | input_line_pointer++; | |
3873 | } | |
3874 | else | |
3875 | break; | |
3876 | } | |
3877 | result = (result << 8) | (*input_line_pointer++); | |
3878 | } | |
3879 | ||
3880 | /* Left justify */ | |
3881 | while (scan < nbytes) | |
3882 | { | |
3883 | result <<= 8; | |
3884 | scan++; | |
3885 | } | |
3886 | /* Create correct expression */ | |
3887 | exp->X_op = O_constant; | |
3888 | exp->X_add_number = result; | |
3889 | /* Fake it so that we can read the next char too */ | |
3890 | if (input_line_pointer[0] != '\'' || | |
3891 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
3892 | { | |
3893 | input_line_pointer -= 2; | |
3894 | input_line_pointer[0] = ','; | |
3895 | input_line_pointer[1] = '\''; | |
3896 | } | |
3897 | else | |
3898 | input_line_pointer++; | |
3899 | } | |
3900 | } | |
abd63a32 | 3901 | #endif /* TC_M68K */ |
252b5132 RH |
3902 | \f |
3903 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3904 | ||
3905 | /* Parse a repeat expression for cons. This is used by the MIPS | |
3906 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
3907 | object file COUNT times. | |
3908 | ||
3909 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
3910 | ||
3911 | static void | |
3912 | parse_repeat_cons (exp, nbytes) | |
3913 | expressionS *exp; | |
3914 | unsigned int nbytes; | |
3915 | { | |
3916 | expressionS count; | |
3917 | register int i; | |
3918 | ||
3919 | expression (exp); | |
3920 | ||
3921 | if (*input_line_pointer != ':') | |
3922 | { | |
3923 | /* No repeat count. */ | |
3924 | return; | |
3925 | } | |
3926 | ||
3927 | ++input_line_pointer; | |
3928 | expression (&count); | |
3929 | if (count.X_op != O_constant | |
3930 | || count.X_add_number <= 0) | |
3931 | { | |
3932 | as_warn (_("Unresolvable or nonpositive repeat count; using 1")); | |
3933 | return; | |
3934 | } | |
3935 | ||
3936 | /* The cons function is going to output this expression once. So we | |
3937 | output it count - 1 times. */ | |
3938 | for (i = count.X_add_number - 1; i > 0; i--) | |
3939 | emit_expr (exp, nbytes); | |
3940 | } | |
3941 | ||
3942 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
3943 | \f | |
3944 | /* Parse a floating point number represented as a hex constant. This | |
3945 | permits users to specify the exact bits they want in the floating | |
3946 | point number. */ | |
3947 | ||
3948 | static int | |
3949 | hex_float (float_type, bytes) | |
3950 | int float_type; | |
3951 | char *bytes; | |
3952 | { | |
3953 | int length; | |
3954 | int i; | |
3955 | ||
3956 | switch (float_type) | |
3957 | { | |
3958 | case 'f': | |
3959 | case 'F': | |
3960 | case 's': | |
3961 | case 'S': | |
3962 | length = 4; | |
3963 | break; | |
3964 | ||
3965 | case 'd': | |
3966 | case 'D': | |
3967 | case 'r': | |
3968 | case 'R': | |
3969 | length = 8; | |
3970 | break; | |
3971 | ||
3972 | case 'x': | |
3973 | case 'X': | |
3974 | length = 12; | |
3975 | break; | |
3976 | ||
3977 | case 'p': | |
3978 | case 'P': | |
3979 | length = 12; | |
3980 | break; | |
3981 | ||
3982 | default: | |
3983 | as_bad (_("Unknown floating type type '%c'"), float_type); | |
3984 | return -1; | |
3985 | } | |
3986 | ||
3987 | /* It would be nice if we could go through expression to parse the | |
3988 | hex constant, but if we get a bignum it's a pain to sort it into | |
3989 | the buffer correctly. */ | |
3990 | i = 0; | |
3991 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') | |
3992 | { | |
3993 | int d; | |
3994 | ||
3995 | /* The MRI assembler accepts arbitrary underscores strewn about | |
3996 | through the hex constant, so we ignore them as well. */ | |
3997 | if (*input_line_pointer == '_') | |
3998 | { | |
3999 | ++input_line_pointer; | |
4000 | continue; | |
4001 | } | |
4002 | ||
4003 | if (i >= length) | |
4004 | { | |
4005 | as_warn (_("Floating point constant too large")); | |
4006 | return -1; | |
4007 | } | |
4008 | d = hex_value (*input_line_pointer) << 4; | |
4009 | ++input_line_pointer; | |
4010 | while (*input_line_pointer == '_') | |
4011 | ++input_line_pointer; | |
4012 | if (hex_p (*input_line_pointer)) | |
4013 | { | |
4014 | d += hex_value (*input_line_pointer); | |
4015 | ++input_line_pointer; | |
4016 | } | |
4017 | if (target_big_endian) | |
4018 | bytes[i] = d; | |
4019 | else | |
4020 | bytes[length - i - 1] = d; | |
4021 | ++i; | |
4022 | } | |
4023 | ||
4024 | if (i < length) | |
4025 | { | |
4026 | if (target_big_endian) | |
4027 | memset (bytes + i, 0, length - i); | |
4028 | else | |
4029 | memset (bytes, 0, length - i); | |
4030 | } | |
4031 | ||
4032 | return length; | |
4033 | } | |
4034 | ||
4035 | /* | |
4036 | * float_cons() | |
4037 | * | |
4038 | * CONStruct some more frag chars of .floats .ffloats etc. | |
4039 | * Makes 0 or more new frags. | |
4040 | * If need_pass_2 == 1, no frags are emitted. | |
4041 | * This understands only floating literals, not expressions. Sorry. | |
4042 | * | |
4043 | * A floating constant is defined by atof_generic(), except it is preceded | |
4044 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
4045 | * reading, I decided to be incompatible. This always tries to give you | |
4046 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
4047 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
4048 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
4049 | * scanners you directed AS to use. | |
4050 | * | |
4051 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
4052 | * | |
4053 | */ | |
4054 | ||
4055 | void | |
4056 | float_cons (float_type) | |
4057 | /* Clobbers input_line-pointer, checks end-of-line. */ | |
4058 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ | |
4059 | { | |
4060 | register char *p; | |
4061 | int length; /* Number of chars in an object. */ | |
4062 | register char *err; /* Error from scanning floating literal. */ | |
4063 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
4064 | ||
4065 | if (is_it_end_of_statement ()) | |
4066 | { | |
4067 | demand_empty_rest_of_line (); | |
4068 | return; | |
4069 | } | |
4070 | ||
4071 | #ifdef md_flush_pending_output | |
4072 | md_flush_pending_output (); | |
4073 | #endif | |
4074 | ||
4075 | do | |
4076 | { | |
4077 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
4078 | SKIP_WHITESPACE (); | |
4079 | ||
4080 | /* Skip any 0{letter} that may be present. Don't even check if the | |
4081 | * letter is legal. Someone may invent a "z" format and this routine | |
4082 | * has no use for such information. Lusers beware: you get | |
4083 | * diagnostics if your input is ill-conditioned. | |
4084 | */ | |
4085 | if (input_line_pointer[0] == '0' | |
4086 | && isalpha ((unsigned char) input_line_pointer[1])) | |
4087 | input_line_pointer += 2; | |
4088 | ||
4089 | /* Accept :xxxx, where the x's are hex digits, for a floating | |
4090 | point with the exact digits specified. */ | |
4091 | if (input_line_pointer[0] == ':') | |
4092 | { | |
4093 | ++input_line_pointer; | |
4094 | length = hex_float (float_type, temp); | |
4095 | if (length < 0) | |
4096 | { | |
4097 | ignore_rest_of_line (); | |
4098 | return; | |
4099 | } | |
4100 | } | |
4101 | else | |
4102 | { | |
4103 | err = md_atof (float_type, temp, &length); | |
4104 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
4105 | know (length > 0); | |
4106 | if (err) | |
4107 | { | |
4108 | as_bad (_("Bad floating literal: %s"), err); | |
4109 | ignore_rest_of_line (); | |
4110 | return; | |
4111 | } | |
4112 | } | |
4113 | ||
4114 | if (!need_pass_2) | |
4115 | { | |
4116 | int count; | |
4117 | ||
4118 | count = 1; | |
4119 | ||
4120 | #ifdef REPEAT_CONS_EXPRESSIONS | |
4121 | if (*input_line_pointer == ':') | |
4122 | { | |
4123 | expressionS count_exp; | |
4124 | ||
4125 | ++input_line_pointer; | |
4126 | expression (&count_exp); | |
4127 | if (count_exp.X_op != O_constant | |
4128 | || count_exp.X_add_number <= 0) | |
4129 | { | |
4130 | as_warn (_("unresolvable or nonpositive repeat count; using 1")); | |
4131 | } | |
4132 | else | |
4133 | count = count_exp.X_add_number; | |
4134 | } | |
4135 | #endif | |
4136 | ||
4137 | while (--count >= 0) | |
4138 | { | |
4139 | p = frag_more (length); | |
4140 | memcpy (p, temp, (unsigned int) length); | |
4141 | } | |
4142 | } | |
4143 | SKIP_WHITESPACE (); | |
4144 | } | |
4145 | while (*input_line_pointer++ == ','); | |
4146 | ||
4147 | --input_line_pointer; /* Put terminator back into stream. */ | |
4148 | demand_empty_rest_of_line (); | |
4149 | } /* float_cons() */ | |
4150 | \f | |
4151 | /* Return the size of a LEB128 value */ | |
4152 | ||
4153 | static inline int | |
4154 | sizeof_sleb128 (value) | |
4155 | offsetT value; | |
4156 | { | |
4157 | register int size = 0; | |
4158 | register unsigned byte; | |
4159 | ||
4160 | do | |
4161 | { | |
4162 | byte = (value & 0x7f); | |
4163 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4164 | Fortunately, we can structure things so that the extra work reduces | |
4165 | to a noop on systems that do things "properly". */ | |
4166 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4167 | size += 1; | |
4168 | } | |
4169 | while (!(((value == 0) && ((byte & 0x40) == 0)) | |
4170 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4171 | ||
4172 | return size; | |
4173 | } | |
4174 | ||
4175 | static inline int | |
4176 | sizeof_uleb128 (value) | |
4177 | valueT value; | |
4178 | { | |
4179 | register int size = 0; | |
4180 | register unsigned byte; | |
4181 | ||
4182 | do | |
4183 | { | |
4184 | byte = (value & 0x7f); | |
4185 | value >>= 7; | |
4186 | size += 1; | |
4187 | } | |
4188 | while (value != 0); | |
4189 | ||
4190 | return size; | |
4191 | } | |
4192 | ||
4193 | int | |
4194 | sizeof_leb128 (value, sign) | |
4195 | valueT value; | |
4196 | int sign; | |
4197 | { | |
4198 | if (sign) | |
4199 | return sizeof_sleb128 ((offsetT) value); | |
4200 | else | |
4201 | return sizeof_uleb128 (value); | |
4202 | } | |
4203 | ||
4204 | /* Output a LEB128 value. */ | |
4205 | ||
4206 | static inline int | |
4207 | output_sleb128 (p, value) | |
4208 | char *p; | |
4209 | offsetT value; | |
4210 | { | |
4211 | register char *orig = p; | |
4212 | register int more; | |
4213 | ||
4214 | do | |
4215 | { | |
4216 | unsigned byte = (value & 0x7f); | |
4217 | ||
4218 | /* Sadly, we cannot rely on typical arithmetic right shift behaviour. | |
4219 | Fortunately, we can structure things so that the extra work reduces | |
4220 | to a noop on systems that do things "properly". */ | |
4221 | value = (value >> 7) | ~(-(offsetT)1 >> 7); | |
4222 | ||
4223 | more = !((((value == 0) && ((byte & 0x40) == 0)) | |
4224 | || ((value == -1) && ((byte & 0x40) != 0)))); | |
4225 | if (more) | |
4226 | byte |= 0x80; | |
4227 | ||
4228 | *p++ = byte; | |
4229 | } | |
4230 | while (more); | |
4231 | ||
4232 | return p - orig; | |
4233 | } | |
4234 | ||
4235 | static inline int | |
4236 | output_uleb128 (p, value) | |
4237 | char *p; | |
4238 | valueT value; | |
4239 | { | |
4240 | char *orig = p; | |
4241 | ||
4242 | do | |
4243 | { | |
4244 | unsigned byte = (value & 0x7f); | |
4245 | value >>= 7; | |
4246 | if (value != 0) | |
4247 | /* More bytes to follow. */ | |
4248 | byte |= 0x80; | |
4249 | ||
4250 | *p++ = byte; | |
4251 | } | |
4252 | while (value != 0); | |
4253 | ||
4254 | return p - orig; | |
4255 | } | |
4256 | ||
4257 | int | |
4258 | output_leb128 (p, value, sign) | |
4259 | char *p; | |
4260 | valueT value; | |
4261 | int sign; | |
4262 | { | |
4263 | if (sign) | |
4264 | return output_sleb128 (p, (offsetT) value); | |
4265 | else | |
4266 | return output_uleb128 (p, value); | |
4267 | } | |
4268 | ||
4269 | /* Do the same for bignums. We combine sizeof with output here in that | |
4270 | we don't output for NULL values of P. It isn't really as critical as | |
4271 | for "normal" values that this be streamlined. */ | |
4272 | ||
6d4d30bb | 4273 | static inline int |
252b5132 RH |
4274 | output_big_sleb128 (p, bignum, size) |
4275 | char *p; | |
4276 | LITTLENUM_TYPE *bignum; | |
4277 | int size; | |
4278 | { | |
4279 | char *orig = p; | |
4280 | valueT val = 0; | |
4281 | int loaded = 0; | |
4282 | unsigned byte; | |
4283 | ||
4284 | /* Strip leading sign extensions off the bignum. */ | |
4285 | while (size > 0 && bignum[size-1] == (LITTLENUM_TYPE)-1) | |
4286 | size--; | |
4287 | ||
4288 | do | |
4289 | { | |
4290 | if (loaded < 7 && size > 0) | |
4291 | { | |
4292 | val |= (*bignum << loaded); | |
4293 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4294 | size--; | |
4295 | bignum++; | |
4296 | } | |
4297 | ||
4298 | byte = val & 0x7f; | |
4299 | loaded -= 7; | |
4300 | val >>= 7; | |
4301 | ||
4302 | if (size == 0) | |
4303 | { | |
4304 | if ((val == 0 && (byte & 0x40) == 0) | |
4305 | || (~(val | ~(((valueT)1 << loaded) - 1)) == 0 | |
4306 | && (byte & 0x40) != 0)) | |
4307 | byte |= 0x80; | |
4308 | } | |
4309 | ||
4310 | if (orig) | |
4311 | *p = byte; | |
4312 | p++; | |
4313 | } | |
4314 | while (byte & 0x80); | |
4315 | ||
4316 | return p - orig; | |
4317 | } | |
4318 | ||
6d4d30bb | 4319 | static inline int |
252b5132 RH |
4320 | output_big_uleb128 (p, bignum, size) |
4321 | char *p; | |
4322 | LITTLENUM_TYPE *bignum; | |
4323 | int size; | |
4324 | { | |
4325 | char *orig = p; | |
4326 | valueT val = 0; | |
4327 | int loaded = 0; | |
4328 | unsigned byte; | |
4329 | ||
4330 | /* Strip leading zeros off the bignum. */ | |
4331 | /* XXX: Is this needed? */ | |
4332 | while (size > 0 && bignum[size-1] == 0) | |
4333 | size--; | |
4334 | ||
4335 | do | |
4336 | { | |
4337 | if (loaded < 7 && size > 0) | |
4338 | { | |
4339 | val |= (*bignum << loaded); | |
4340 | loaded += 8 * CHARS_PER_LITTLENUM; | |
4341 | size--; | |
4342 | bignum++; | |
4343 | } | |
4344 | ||
4345 | byte = val & 0x7f; | |
4346 | loaded -= 7; | |
4347 | val >>= 7; | |
4348 | ||
4349 | if (size > 0 || val) | |
4350 | byte |= 0x80; | |
4351 | ||
4352 | if (orig) | |
4353 | *p = byte; | |
4354 | p++; | |
4355 | } | |
4356 | while (byte & 0x80); | |
4357 | ||
4358 | return p - orig; | |
4359 | } | |
4360 | ||
6d4d30bb | 4361 | static int |
252b5132 RH |
4362 | output_big_leb128 (p, bignum, size, sign) |
4363 | char *p; | |
4364 | LITTLENUM_TYPE *bignum; | |
4365 | int size, sign; | |
4366 | { | |
4367 | if (sign) | |
4368 | return output_big_sleb128 (p, bignum, size); | |
4369 | else | |
4370 | return output_big_uleb128 (p, bignum, size); | |
4371 | } | |
4372 | ||
4373 | /* Generate the appropriate fragments for a given expression to emit a | |
4374 | leb128 value. */ | |
4375 | ||
4376 | void | |
4377 | emit_leb128_expr(exp, sign) | |
4378 | expressionS *exp; | |
4379 | int sign; | |
4380 | { | |
4381 | operatorT op = exp->X_op; | |
4382 | ||
4383 | if (op == O_absent || op == O_illegal) | |
4384 | { | |
4385 | as_warn (_("zero assumed for missing expression")); | |
4386 | exp->X_add_number = 0; | |
4387 | op = O_constant; | |
4388 | } | |
4389 | else if (op == O_big && exp->X_add_number <= 0) | |
4390 | { | |
4391 | as_bad (_("floating point number invalid; zero assumed")); | |
4392 | exp->X_add_number = 0; | |
4393 | op = O_constant; | |
4394 | } | |
4395 | else if (op == O_register) | |
4396 | { | |
4397 | as_warn (_("register value used as expression")); | |
4398 | op = O_constant; | |
4399 | } | |
4400 | ||
4401 | if (op == O_constant) | |
4402 | { | |
4403 | /* If we've got a constant, emit the thing directly right now. */ | |
4404 | ||
4405 | valueT value = exp->X_add_number; | |
4406 | int size; | |
4407 | char *p; | |
4408 | ||
4409 | size = sizeof_leb128 (value, sign); | |
4410 | p = frag_more (size); | |
4411 | output_leb128 (p, value, sign); | |
4412 | } | |
4413 | else if (op == O_big) | |
4414 | { | |
4415 | /* O_big is a different sort of constant. */ | |
4416 | ||
4417 | int size; | |
4418 | char *p; | |
4419 | ||
4420 | size = output_big_leb128 (NULL, generic_bignum, exp->X_add_number, sign); | |
4421 | p = frag_more (size); | |
4422 | output_big_leb128 (p, generic_bignum, exp->X_add_number, sign); | |
4423 | } | |
4424 | else | |
4425 | { | |
4426 | /* Otherwise, we have to create a variable sized fragment and | |
4427 | resolve things later. */ | |
4428 | ||
4429 | frag_var (rs_leb128, sizeof_uleb128 (~(valueT)0), 0, sign, | |
4430 | make_expr_symbol (exp), 0, (char *) NULL); | |
4431 | } | |
4432 | } | |
4433 | ||
4434 | /* Parse the .sleb128 and .uleb128 pseudos. */ | |
4435 | ||
4436 | void | |
4437 | s_leb128 (sign) | |
4438 | int sign; | |
4439 | { | |
4440 | expressionS exp; | |
4441 | ||
4442 | do { | |
4443 | expression (&exp); | |
4444 | emit_leb128_expr (&exp, sign); | |
4445 | } while (*input_line_pointer++ == ','); | |
4446 | ||
4447 | input_line_pointer--; | |
4448 | demand_empty_rest_of_line (); | |
4449 | } | |
4450 | \f | |
4451 | /* | |
4452 | * stringer() | |
4453 | * | |
1c32af22 | 4454 | * We read 0 or more ',' separated, double-quoted strings. |
252b5132 RH |
4455 | * |
4456 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
4457 | */ | |
4458 | ||
4459 | ||
4460 | void | |
4461 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
4462 | /* Checks end-of-line. */ | |
4463 | register int append_zero; /* 0: don't append '\0', else 1 */ | |
4464 | { | |
4465 | register unsigned int c; | |
4466 | char *start; | |
4467 | ||
4468 | #ifdef md_flush_pending_output | |
4469 | md_flush_pending_output (); | |
4470 | #endif | |
4471 | ||
4472 | /* | |
4473 | * The following awkward logic is to parse ZERO or more strings, | |
4474 | * comma separated. Recall a string expression includes spaces | |
4475 | * before the opening '\"' and spaces after the closing '\"'. | |
4476 | * We fake a leading ',' if there is (supposed to be) | |
4477 | * a 1st, expression. We keep demanding expressions for each | |
4478 | * ','. | |
4479 | */ | |
4480 | if (is_it_end_of_statement ()) | |
4481 | { | |
4482 | c = 0; /* Skip loop. */ | |
4483 | ++input_line_pointer; /* Compensate for end of loop. */ | |
4484 | } | |
4485 | else | |
4486 | { | |
4487 | c = ','; /* Do loop. */ | |
4488 | } | |
4489 | while (c == ',' || c == '<' || c == '"') | |
4490 | { | |
4491 | SKIP_WHITESPACE (); | |
4492 | switch (*input_line_pointer) | |
4493 | { | |
4494 | case '\"': | |
4495 | ++input_line_pointer; /*->1st char of string. */ | |
4496 | start = input_line_pointer; | |
4497 | while (is_a_char (c = next_char_of_string ())) | |
4498 | { | |
4499 | FRAG_APPEND_1_CHAR (c); | |
4500 | } | |
4501 | if (append_zero) | |
4502 | { | |
4503 | FRAG_APPEND_1_CHAR (0); | |
4504 | } | |
4505 | know (input_line_pointer[-1] == '\"'); | |
4506 | ||
4507 | #ifndef NO_LISTING | |
4508 | #ifdef OBJ_ELF | |
4509 | /* In ELF, when gcc is emitting DWARF 1 debugging output, it | |
4510 | will emit .string with a filename in the .debug section | |
4511 | after a sequence of constants. See the comment in | |
4512 | emit_expr for the sequence. emit_expr will set | |
4513 | dwarf_file_string to non-zero if this string might be a | |
4514 | source file name. */ | |
4515 | if (strcmp (segment_name (now_seg), ".debug") != 0) | |
4516 | dwarf_file_string = 0; | |
4517 | else if (dwarf_file_string) | |
4518 | { | |
4519 | c = input_line_pointer[-1]; | |
4520 | input_line_pointer[-1] = '\0'; | |
4521 | listing_source_file (start); | |
4522 | input_line_pointer[-1] = c; | |
4523 | } | |
4524 | #endif | |
4525 | #endif | |
4526 | ||
4527 | break; | |
4528 | case '<': | |
4529 | input_line_pointer++; | |
4530 | c = get_single_number (); | |
4531 | FRAG_APPEND_1_CHAR (c); | |
4532 | if (*input_line_pointer != '>') | |
4533 | { | |
4534 | as_bad (_("Expected <nn>")); | |
4535 | } | |
4536 | input_line_pointer++; | |
4537 | break; | |
4538 | case ',': | |
4539 | input_line_pointer++; | |
4540 | break; | |
4541 | } | |
4542 | SKIP_WHITESPACE (); | |
4543 | c = *input_line_pointer; | |
4544 | } | |
4545 | ||
4546 | demand_empty_rest_of_line (); | |
4547 | } /* stringer() */ | |
4548 | \f | |
4549 | /* FIXME-SOMEDAY: I had trouble here on characters with the | |
4550 | high bits set. We'll probably also have trouble with | |
4551 | multibyte chars, wide chars, etc. Also be careful about | |
4552 | returning values bigger than 1 byte. xoxorich. */ | |
4553 | ||
4554 | unsigned int | |
4555 | next_char_of_string () | |
4556 | { | |
4557 | register unsigned int c; | |
4558 | ||
4559 | c = *input_line_pointer++ & CHAR_MASK; | |
4560 | switch (c) | |
4561 | { | |
4562 | case '\"': | |
4563 | c = NOT_A_CHAR; | |
4564 | break; | |
4565 | ||
4566 | case '\n': | |
4567 | as_warn (_("Unterminated string: Newline inserted.")); | |
4568 | bump_line_counters (); | |
4569 | break; | |
4570 | ||
4571 | #ifndef NO_STRING_ESCAPES | |
4572 | case '\\': | |
4573 | switch (c = *input_line_pointer++) | |
4574 | { | |
4575 | case 'b': | |
4576 | c = '\b'; | |
4577 | break; | |
4578 | ||
4579 | case 'f': | |
4580 | c = '\f'; | |
4581 | break; | |
4582 | ||
4583 | case 'n': | |
4584 | c = '\n'; | |
4585 | break; | |
4586 | ||
4587 | case 'r': | |
4588 | c = '\r'; | |
4589 | break; | |
4590 | ||
4591 | case 't': | |
4592 | c = '\t'; | |
4593 | break; | |
4594 | ||
4595 | case 'v': | |
4596 | c = '\013'; | |
4597 | break; | |
4598 | ||
4599 | case '\\': | |
4600 | case '"': | |
4601 | break; /* As itself. */ | |
4602 | ||
4603 | case '0': | |
4604 | case '1': | |
4605 | case '2': | |
4606 | case '3': | |
4607 | case '4': | |
4608 | case '5': | |
4609 | case '6': | |
4610 | case '7': | |
4611 | case '8': | |
4612 | case '9': | |
4613 | { | |
4614 | long number; | |
4615 | int i; | |
4616 | ||
4617 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) | |
4618 | { | |
4619 | number = number * 8 + c - '0'; | |
4620 | } | |
4621 | c = number & 0xff; | |
4622 | } | |
4623 | --input_line_pointer; | |
4624 | break; | |
4625 | ||
4626 | case 'x': | |
4627 | case 'X': | |
4628 | { | |
4629 | long number; | |
4630 | ||
4631 | number = 0; | |
4632 | c = *input_line_pointer++; | |
4633 | while (isxdigit (c)) | |
4634 | { | |
4635 | if (isdigit (c)) | |
4636 | number = number * 16 + c - '0'; | |
4637 | else if (isupper (c)) | |
4638 | number = number * 16 + c - 'A' + 10; | |
4639 | else | |
4640 | number = number * 16 + c - 'a' + 10; | |
4641 | c = *input_line_pointer++; | |
4642 | } | |
4643 | c = number & 0xff; | |
4644 | --input_line_pointer; | |
4645 | } | |
4646 | break; | |
4647 | ||
4648 | case '\n': | |
4649 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
4650 | as_warn (_("Unterminated string: Newline inserted.")); | |
4651 | c = '\n'; | |
4652 | bump_line_counters (); | |
4653 | break; | |
4654 | ||
4655 | default: | |
4656 | ||
4657 | #ifdef ONLY_STANDARD_ESCAPES | |
4658 | as_bad (_("Bad escaped character in string, '?' assumed")); | |
4659 | c = '?'; | |
4660 | #endif /* ONLY_STANDARD_ESCAPES */ | |
4661 | ||
4662 | break; | |
4663 | } /* switch on escaped char */ | |
4664 | break; | |
4665 | #endif /* ! defined (NO_STRING_ESCAPES) */ | |
4666 | ||
4667 | default: | |
4668 | break; | |
4669 | } /* switch on char */ | |
4670 | return (c); | |
4671 | } /* next_char_of_string() */ | |
4672 | \f | |
4673 | static segT | |
4674 | get_segmented_expression (expP) | |
4675 | register expressionS *expP; | |
4676 | { | |
4677 | register segT retval; | |
4678 | ||
4679 | retval = expression (expP); | |
4680 | if (expP->X_op == O_illegal | |
4681 | || expP->X_op == O_absent | |
4682 | || expP->X_op == O_big) | |
4683 | { | |
4684 | as_bad (_("expected address expression; zero assumed")); | |
4685 | expP->X_op = O_constant; | |
4686 | expP->X_add_number = 0; | |
4687 | retval = absolute_section; | |
4688 | } | |
4689 | return retval; | |
4690 | } | |
4691 | ||
4692 | static segT | |
4693 | get_known_segmented_expression (expP) | |
4694 | register expressionS *expP; | |
4695 | { | |
4696 | register segT retval; | |
4697 | ||
4698 | if ((retval = get_segmented_expression (expP)) == undefined_section) | |
4699 | { | |
4700 | /* There is no easy way to extract the undefined symbol from the | |
4701 | expression. */ | |
4702 | if (expP->X_add_symbol != NULL | |
4703 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
4704 | as_warn (_("symbol \"%s\" undefined; zero assumed"), | |
4705 | S_GET_NAME (expP->X_add_symbol)); | |
4706 | else | |
4707 | as_warn (_("some symbol undefined; zero assumed")); | |
4708 | retval = absolute_section; | |
4709 | expP->X_op = O_constant; | |
4710 | expP->X_add_number = 0; | |
4711 | } | |
4712 | know (retval == absolute_section || SEG_NORMAL (retval)); | |
4713 | return (retval); | |
4714 | } /* get_known_segmented_expression() */ | |
4715 | ||
4716 | offsetT | |
4717 | get_absolute_expression () | |
4718 | { | |
4719 | expressionS exp; | |
4720 | ||
4721 | expression (&exp); | |
4722 | if (exp.X_op != O_constant) | |
4723 | { | |
4724 | if (exp.X_op != O_absent) | |
4725 | as_bad (_("bad or irreducible absolute expression; zero assumed")); | |
4726 | exp.X_add_number = 0; | |
4727 | } | |
4728 | return exp.X_add_number; | |
4729 | } | |
4730 | ||
4731 | char /* return terminator */ | |
4732 | get_absolute_expression_and_terminator (val_pointer) | |
4733 | long *val_pointer; /* return value of expression */ | |
4734 | { | |
4735 | /* FIXME: val_pointer should probably be offsetT *. */ | |
4736 | *val_pointer = (long) get_absolute_expression (); | |
4737 | return (*input_line_pointer++); | |
4738 | } | |
4739 | \f | |
4740 | /* | |
4741 | * demand_copy_C_string() | |
4742 | * | |
4743 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
4744 | * Give a warning if that happens. | |
4745 | */ | |
4746 | char * | |
4747 | demand_copy_C_string (len_pointer) | |
4748 | int *len_pointer; | |
4749 | { | |
4750 | register char *s; | |
4751 | ||
4752 | if ((s = demand_copy_string (len_pointer)) != 0) | |
4753 | { | |
4754 | register int len; | |
4755 | ||
4756 | for (len = *len_pointer; len > 0; len--) | |
4757 | { | |
4758 | if (*s == 0) | |
4759 | { | |
4760 | s = 0; | |
4761 | len = 1; | |
4762 | *len_pointer = 0; | |
4763 | as_bad (_("This string may not contain \'\\0\'")); | |
4764 | } | |
4765 | } | |
4766 | } | |
4767 | return s; | |
4768 | } | |
4769 | \f | |
4770 | /* | |
4771 | * demand_copy_string() | |
4772 | * | |
4773 | * Demand string, but return a safe (=private) copy of the string. | |
4774 | * Return NULL if we can't read a string here. | |
4775 | */ | |
4776 | char * | |
4777 | demand_copy_string (lenP) | |
4778 | int *lenP; | |
4779 | { | |
4780 | register unsigned int c; | |
4781 | register int len; | |
4782 | char *retval; | |
4783 | ||
4784 | len = 0; | |
4785 | SKIP_WHITESPACE (); | |
4786 | if (*input_line_pointer == '\"') | |
4787 | { | |
4788 | input_line_pointer++; /* Skip opening quote. */ | |
4789 | ||
4790 | while (is_a_char (c = next_char_of_string ())) | |
4791 | { | |
4792 | obstack_1grow (¬es, c); | |
4793 | len++; | |
4794 | } | |
4795 | /* JF this next line is so demand_copy_C_string will return a | |
4796 | null terminated string. */ | |
4797 | obstack_1grow (¬es, '\0'); | |
4798 | retval = obstack_finish (¬es); | |
4799 | } | |
4800 | else | |
4801 | { | |
4802 | as_warn (_("Missing string")); | |
4803 | retval = NULL; | |
4804 | ignore_rest_of_line (); | |
4805 | } | |
4806 | *lenP = len; | |
4807 | return (retval); | |
4808 | } /* demand_copy_string() */ | |
4809 | \f | |
4810 | /* | |
4811 | * is_it_end_of_statement() | |
4812 | * | |
4813 | * In: Input_line_pointer->next character. | |
4814 | * | |
4815 | * Do: Skip input_line_pointer over all whitespace. | |
4816 | * | |
4817 | * Out: 1 if input_line_pointer->end-of-line. | |
4818 | */ | |
4819 | int | |
4820 | is_it_end_of_statement () | |
4821 | { | |
4822 | SKIP_WHITESPACE (); | |
4823 | return (is_end_of_line[(unsigned char) *input_line_pointer]); | |
4824 | } /* is_it_end_of_statement() */ | |
4825 | ||
4826 | void | |
4827 | equals (sym_name, reassign) | |
4828 | char *sym_name; | |
4829 | int reassign; | |
4830 | { | |
4831 | register symbolS *symbolP; /* symbol we are working with */ | |
4832 | char *stop = NULL; | |
4833 | char stopc; | |
4834 | ||
4835 | input_line_pointer++; | |
4836 | if (*input_line_pointer == '=') | |
4837 | input_line_pointer++; | |
4838 | ||
4839 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') | |
4840 | input_line_pointer++; | |
4841 | ||
4842 | if (flag_mri) | |
4843 | stop = mri_comment_field (&stopc); | |
4844 | ||
4845 | if (sym_name[0] == '.' && sym_name[1] == '\0') | |
4846 | { | |
4847 | /* Turn '. = mumble' into a .org mumble */ | |
4848 | register segT segment; | |
4849 | expressionS exp; | |
4850 | ||
4851 | segment = get_known_segmented_expression (&exp); | |
4852 | if (!need_pass_2) | |
4853 | do_org (segment, &exp, 0); | |
4854 | } | |
4855 | else | |
4856 | { | |
4857 | symbolP = symbol_find_or_make (sym_name); | |
4858 | /* Permit register names to be redefined. */ | |
4859 | if (! reassign | |
4860 | && S_IS_DEFINED (symbolP) | |
4861 | && S_GET_SEGMENT (symbolP) != reg_section) | |
4862 | as_bad (_("symbol `%s' already defined"), S_GET_NAME (symbolP)); | |
4863 | pseudo_set (symbolP); | |
4864 | } | |
4865 | ||
4866 | if (flag_mri) | |
4867 | { | |
4868 | ignore_rest_of_line (); /* check garbage after the expression */ | |
4869 | mri_comment_end (stop, stopc); | |
4870 | } | |
4871 | } /* equals() */ | |
4872 | ||
4873 | /* .include -- include a file at this point. */ | |
4874 | ||
4875 | /* ARGSUSED */ | |
4876 | void | |
4877 | s_include (arg) | |
ab9da554 | 4878 | int arg ATTRIBUTE_UNUSED; |
252b5132 | 4879 | { |
252b5132 RH |
4880 | char *filename; |
4881 | int i; | |
4882 | FILE *try; | |
4883 | char *path; | |
4884 | ||
4885 | if (! flag_m68k_mri) | |
4886 | { | |
4887 | filename = demand_copy_string (&i); | |
4888 | if (filename == NULL) | |
4889 | { | |
4890 | /* demand_copy_string has already printed an error and | |
4891 | called ignore_rest_of_line. */ | |
4892 | return; | |
4893 | } | |
4894 | } | |
4895 | else | |
4896 | { | |
4897 | SKIP_WHITESPACE (); | |
4898 | i = 0; | |
4899 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
4900 | && *input_line_pointer != ' ' | |
4901 | && *input_line_pointer != '\t') | |
4902 | { | |
4903 | obstack_1grow (¬es, *input_line_pointer); | |
4904 | ++input_line_pointer; | |
4905 | ++i; | |
4906 | } | |
4907 | obstack_1grow (¬es, '\0'); | |
4908 | filename = obstack_finish (¬es); | |
4909 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
4910 | ++input_line_pointer; | |
4911 | } | |
4912 | demand_empty_rest_of_line (); | |
4913 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); | |
4914 | for (i = 0; i < include_dir_count; i++) | |
4915 | { | |
4916 | strcpy (path, include_dirs[i]); | |
4917 | strcat (path, "/"); | |
4918 | strcat (path, filename); | |
4919 | if (0 != (try = fopen (path, "r"))) | |
4920 | { | |
4921 | fclose (try); | |
4922 | goto gotit; | |
4923 | } | |
4924 | } | |
4925 | free (path); | |
4926 | path = filename; | |
4927 | gotit: | |
4928 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
4929 | register_dependency (path); | |
9f10757c | 4930 | input_scrub_insert_file (path); |
252b5132 RH |
4931 | } /* s_include() */ |
4932 | ||
4933 | void | |
4934 | add_include_dir (path) | |
4935 | char *path; | |
4936 | { | |
4937 | int i; | |
4938 | ||
4939 | if (include_dir_count == 0) | |
4940 | { | |
4941 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); | |
4942 | include_dirs[0] = "."; /* Current dir */ | |
4943 | include_dir_count = 2; | |
4944 | } | |
4945 | else | |
4946 | { | |
4947 | include_dir_count++; | |
4948 | include_dirs = (char **) realloc (include_dirs, | |
4949 | include_dir_count * sizeof (*include_dirs)); | |
4950 | } | |
4951 | ||
4952 | include_dirs[include_dir_count - 1] = path; /* New one */ | |
4953 | ||
4954 | i = strlen (path); | |
4955 | if (i > include_dir_maxlen) | |
4956 | include_dir_maxlen = i; | |
4957 | } /* add_include_dir() */ | |
4958 | \f | |
4959 | /* Output debugging information to denote the source file. */ | |
4960 | ||
4961 | static void | |
4962 | generate_file_debug () | |
4963 | { | |
4964 | if (debug_type == DEBUG_STABS) | |
4965 | stabs_generate_asm_file (); | |
4966 | } | |
4967 | ||
4968 | /* Output line number debugging information for the current source line. */ | |
4969 | ||
4970 | void | |
4971 | generate_lineno_debug () | |
4972 | { | |
4973 | #ifdef ECOFF_DEBUGGING | |
4974 | /* ECOFF assemblers automatically generate debugging information. | |
4975 | FIXME: This should probably be handled elsewhere. */ | |
4976 | if (debug_type == DEBUG_UNSPECIFIED) | |
4977 | { | |
4978 | if (ECOFF_DEBUGGING && ecoff_no_current_file ()) | |
4979 | debug_type = DEBUG_ECOFF; | |
4980 | else | |
4981 | debug_type = DEBUG_NONE; | |
4982 | } | |
4983 | #endif | |
4984 | ||
4985 | switch (debug_type) | |
4986 | { | |
4987 | case DEBUG_UNSPECIFIED: | |
4988 | case DEBUG_NONE: | |
4989 | break; | |
4990 | case DEBUG_STABS: | |
4991 | stabs_generate_asm_lineno (); | |
4992 | break; | |
4993 | case DEBUG_ECOFF: | |
4994 | ecoff_generate_asm_lineno (); | |
4995 | break; | |
4996 | case DEBUG_DWARF: | |
4997 | case DEBUG_DWARF2: | |
4998 | /* FIXME. */ | |
4999 | break; | |
5000 | } | |
5001 | } | |
5002 | ||
5003 | /* Output debugging information to mark a function entry point or end point. | |
5004 | END_P is zero for .func, and non-zero for .endfunc. */ | |
5005 | ||
5006 | void | |
5007 | s_func (end_p) | |
5008 | int end_p; | |
5009 | { | |
5010 | do_s_func (end_p, NULL); | |
5011 | } | |
5012 | ||
5013 | /* Subroutine of s_func so targets can choose a different default prefix. | |
5014 | If DEFAULT_PREFIX is NULL, use the target's "leading char". */ | |
5015 | ||
5016 | void | |
5017 | do_s_func (end_p, default_prefix) | |
5018 | int end_p; | |
5019 | const char *default_prefix; | |
5020 | { | |
5021 | /* Record the current function so that we can issue an error message for | |
5022 | misplaced .func,.endfunc, and also so that .endfunc needs no | |
5023 | arguments. */ | |
5024 | static char *current_name; | |
5025 | static char *current_label; | |
5026 | ||
5027 | if (end_p) | |
5028 | { | |
5029 | if (current_name == NULL) | |
5030 | { | |
5031 | as_bad (_("missing .func")); | |
5032 | ignore_rest_of_line (); | |
5033 | return; | |
5034 | } | |
5035 | ||
5036 | if (debug_type == DEBUG_STABS) | |
5037 | stabs_generate_asm_endfunc (current_name, current_label); | |
5038 | ||
5039 | current_name = current_label = NULL; | |
5040 | } | |
5041 | else /* ! end_p */ | |
5042 | { | |
5043 | char *name,*label; | |
5044 | char delim1,delim2; | |
5045 | ||
5046 | if (current_name != NULL) | |
5047 | { | |
5048 | as_bad (_(".endfunc missing for previous .func")); | |
5049 | ignore_rest_of_line (); | |
5050 | return; | |
5051 | } | |
5052 | ||
5053 | name = input_line_pointer; | |
5054 | delim1 = get_symbol_end (); | |
5055 | name = xstrdup (name); | |
5056 | *input_line_pointer = delim1; | |
5057 | SKIP_WHITESPACE (); | |
5058 | if (*input_line_pointer != ',') | |
5059 | { | |
5060 | if (default_prefix) | |
5061 | asprintf (&label, "%s%s", default_prefix, name); | |
5062 | else | |
5063 | { | |
5064 | char leading_char = 0; | |
5065 | #ifdef BFD_ASSEMBLER | |
5066 | leading_char = bfd_get_symbol_leading_char (stdoutput); | |
5067 | #endif | |
5068 | /* Missing entry point, use function's name with the leading | |
5069 | char prepended. */ | |
5070 | if (leading_char) | |
5071 | asprintf (&label, "%c%s", leading_char, name); | |
5072 | else | |
5073 | label = name; | |
5074 | } | |
5075 | } | |
5076 | else | |
5077 | { | |
5078 | ++input_line_pointer; | |
5079 | SKIP_WHITESPACE (); | |
5080 | label = input_line_pointer; | |
5081 | delim2 = get_symbol_end (); | |
5082 | label = xstrdup (label); | |
5083 | *input_line_pointer = delim2; | |
5084 | } | |
5085 | ||
5086 | if (debug_type == DEBUG_STABS) | |
5087 | stabs_generate_asm_func (name, label); | |
5088 | ||
5089 | current_name = name; | |
5090 | current_label = label; | |
5091 | } | |
5092 | ||
5093 | demand_empty_rest_of_line (); | |
5094 | } | |
5095 | \f | |
5096 | void | |
5097 | s_ignore (arg) | |
ab9da554 | 5098 | int arg ATTRIBUTE_UNUSED; |
252b5132 RH |
5099 | { |
5100 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
5101 | { | |
5102 | ++input_line_pointer; | |
5103 | } | |
5104 | ++input_line_pointer; | |
5105 | } | |
5106 | ||
5107 | ||
5108 | void | |
5109 | read_print_statistics (file) | |
5110 | FILE *file; | |
5111 | { | |
5112 | hash_print_statistics (file, "pseudo-op table", po_hash); | |
5113 | } | |
5114 | ||
9f10757c TW |
5115 | /* Inserts the given line into the input stream. |
5116 | ||
5117 | This call avoids macro/conditionals nesting checking, since the contents of | |
5118 | the line are assumed to replace the contents of a line already scanned. | |
5119 | ||
5120 | An appropriate use of this function would be substition of input lines when | |
5121 | called by md_start_line_hook(). The given line is assumed to already be | |
5122 | properly scrubbed. */ | |
5123 | ||
5124 | void | |
5125 | input_scrub_insert_line (line) | |
5126 | const char *line; | |
5127 | { | |
5128 | sb newline; | |
5129 | sb_new (&newline); | |
5130 | sb_add_string (&newline, line); | |
5131 | input_scrub_include_sb (&newline, input_line_pointer, 0); | |
5132 | sb_kill (&newline); | |
5133 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
5134 | } | |
5135 | ||
5136 | /* Insert a file into the input stream; the path must resolve to an actual | |
5137 | file; no include path searching or dependency registering is performed. */ | |
5138 | ||
5139 | void | |
5140 | input_scrub_insert_file (path) | |
5141 | char *path; | |
5142 | { | |
5143 | input_scrub_include_file (path, input_line_pointer); | |
5144 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
5145 | } | |
5146 | ||
252b5132 | 5147 | /* end of read.c */ |