Commit | Line | Data |
---|---|---|
fecd2382 | 1 | /* read.c - read a source file - |
ddb393cf ILT |
2 | Copyright (C) 1986, 1987, 1990, 1991, 1993, 1994 |
3 | Free Software Foundation, Inc. | |
3340f7e5 | 4 | |
f8701a3f SC |
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 | |
a2a5a4fa | 19 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
fecd2382 | 20 | |
016e0d42 | 21 | #if 0 |
fecd2382 RP |
22 | #define MASK_CHAR (0xFF) /* If your chars aren't 8 bits, you will |
23 | change this a bit. But then, GNU isn't | |
24 | spozed to run on your machine anyway. | |
25 | (RMS is so shortsighted sometimes.) | |
26 | */ | |
016e0d42 ILT |
27 | #else |
28 | #define MASK_CHAR ((int)(unsigned char)-1) | |
29 | #endif | |
fecd2382 | 30 | |
9a7d824a | 31 | |
9471a360 KR |
32 | /* This is the largest known floating point format (for now). It will |
33 | grow when we do 4361 style flonums. */ | |
fecd2382 | 34 | |
9471a360 | 35 | #define MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT (16) |
fecd2382 | 36 | |
016e0d42 ILT |
37 | /* Routines that read assembler source text to build spagetti in memory. |
38 | Another group of these functions is in the expr.c module. */ | |
fecd2382 | 39 | |
9471a360 | 40 | /* for isdigit() */ |
6efd877d KR |
41 | #include <ctype.h> |
42 | ||
fecd2382 | 43 | #include "as.h" |
9471a360 | 44 | #include "subsegs.h" |
1356d77d | 45 | #include "libiberty.h" |
fecd2382 | 46 | #include "obstack.h" |
9a7d824a ILT |
47 | #include "listing.h" |
48 | ||
9a7d824a ILT |
49 | #ifndef TC_START_LABEL |
50 | #define TC_START_LABEL(x,y) (x==':') | |
51 | #endif | |
fecd2382 | 52 | |
016e0d42 ILT |
53 | /* The NOP_OPCODE is for the alignment fill value. |
54 | * fill it a nop instruction so that the disassembler does not choke | |
55 | * on it | |
56 | */ | |
57 | #ifndef NOP_OPCODE | |
58 | #define NOP_OPCODE 0x00 | |
59 | #endif | |
60 | ||
61 | char *input_line_pointer; /*->next char of source file to parse. */ | |
fecd2382 | 62 | |
326d16ca | 63 | int generate_asm_lineno = 0; /* flag to generate line stab for .s file */ |
daad3bbf | 64 | |
fecd2382 | 65 | #if BITS_PER_CHAR != 8 |
6efd877d KR |
66 | /* The following table is indexed by[(char)] and will break if |
67 | a char does not have exactly 256 states (hopefully 0:255!)! */ | |
68 | die horribly; | |
fecd2382 | 69 | #endif |
f8701a3f | 70 | |
c978e704 ILT |
71 | #ifndef LEX_AT |
72 | /* The m88k unfortunately uses @ as a label beginner. */ | |
73 | #define LEX_AT 0 | |
74 | #endif | |
75 | ||
ddb393cf ILT |
76 | #ifndef LEX_BR |
77 | /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ | |
78 | #define LEX_BR 0 | |
79 | #endif | |
80 | ||
6ef37255 KR |
81 | #ifndef LEX_PCT |
82 | /* The Delta 68k assembler permits % inside label names. */ | |
83 | #define LEX_PCT 0 | |
84 | #endif | |
85 | ||
016e0d42 | 86 | /* used by is_... macros. our ctype[] */ |
1356d77d | 87 | char lex_type[256] = |
016e0d42 ILT |
88 | { |
89 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
90 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
6ef37255 | 91 | 0, 0, 0, 0, 3, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ |
016e0d42 | 92 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */ |
c978e704 | 93 | LEX_AT, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* @ABCDEFGHIJKLMNO */ |
ddb393cf | 94 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 3, /* PQRSTUVWXYZ[\]^_ */ |
016e0d42 | 95 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ |
ddb393cf | 96 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 0, /* pqrstuvwxyz{|}~. */ |
016e0d42 ILT |
97 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
98 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
99 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
100 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
101 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
102 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
103 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
104 | }; | |
105 | ||
106 | ||
107 | /* | |
fecd2382 RP |
108 | * In: a character. |
109 | * Out: 1 if this character ends a line. | |
110 | */ | |
111 | #define _ (0) | |
016e0d42 ILT |
112 | char is_end_of_line[256] = |
113 | { | |
fecd2382 | 114 | #ifdef CR_EOL |
016e0d42 | 115 | _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */ |
fecd2382 | 116 | #else |
016e0d42 | 117 | _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */ |
fecd2382 | 118 | #endif |
016e0d42 | 119 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
40324362 KR |
120 | #ifdef TC_HPPA |
121 | _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */ | |
122 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */ | |
123 | #else | |
016e0d42 ILT |
124 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
125 | _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */ | |
40324362 | 126 | #endif |
016e0d42 ILT |
127 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
128 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
129 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
130 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
131 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
132 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
133 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
134 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
135 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
136 | }; | |
fecd2382 RP |
137 | #undef _ |
138 | ||
016e0d42 ILT |
139 | /* Functions private to this file. */ |
140 | ||
141 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
142 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
fecd2382 | 143 | |
2209b19c KR |
144 | #ifdef TARGET_BYTES_BIG_ENDIAN |
145 | /* Hack to deal with tc-*.h defining TARGET_BYTES_BIG_ENDIAN to empty | |
146 | instead of to 0 or 1. */ | |
147 | #if 5 - TARGET_BYTES_BIG_ENDIAN - 5 == 10 | |
148 | #undef TARGET_BYTES_BIG_ENDIAN | |
149 | #define TARGET_BYTES_BIG_ENDIAN 1 | |
150 | #endif | |
151 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; | |
152 | #else | |
153 | int target_big_endian /* = 0 */; | |
154 | #endif | |
9c6d3f66 | 155 | |
9471a360 | 156 | static char *old_buffer; /* JF a hack */ |
016e0d42 ILT |
157 | static char *old_input; |
158 | static char *old_limit; | |
fecd2382 | 159 | |
016e0d42 | 160 | /* Variables for handling include file directory list. */ |
fecd2382 | 161 | |
016e0d42 ILT |
162 | char **include_dirs; /* List of pointers to directories to |
163 | search for .include's */ | |
164 | int include_dir_count; /* How many are in the list */ | |
165 | int include_dir_maxlen = 1;/* Length of longest in list */ | |
fecd2382 RP |
166 | |
167 | #ifndef WORKING_DOT_WORD | |
016e0d42 | 168 | struct broken_word *broken_words; |
9471a360 | 169 | int new_broken_words; |
fecd2382 RP |
170 | #endif |
171 | ||
e28c40d7 ILT |
172 | /* The current offset into the absolute section. We don't try to |
173 | build frags in the absolute section, since no data can be stored | |
174 | there. We just keep track of the current offset. */ | |
175 | addressT abs_section_offset; | |
176 | ||
1356d77d ILT |
177 | /* If this line had an MRI style label, it is stored in this variable. |
178 | This is used by some of the MRI pseudo-ops. */ | |
69e077f3 | 179 | symbolS *mri_line_label; |
1356d77d ILT |
180 | |
181 | /* This global variable is used to support MRI common sections. We | |
182 | translate such sections into a common symbol. This variable is | |
183 | non-NULL when we are in an MRI common section. */ | |
184 | symbolS *mri_common_symbol; | |
185 | ||
286cb27a ILT |
186 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we |
187 | need to align to an even byte boundary unless the next pseudo-op is | |
188 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment | |
189 | may be needed. */ | |
190 | static int mri_pending_align; | |
191 | ||
192 | static void do_align PARAMS ((int, char *)); | |
e28c40d7 ILT |
193 | static int hex_float PARAMS ((int, char *)); |
194 | static void do_org PARAMS ((segT, expressionS *, int)); | |
6ef37255 | 195 | char *demand_copy_string PARAMS ((int *lenP)); |
016e0d42 | 196 | int is_it_end_of_statement PARAMS ((void)); |
5ac34ac3 | 197 | static segT get_segmented_expression PARAMS ((expressionS *expP)); |
016e0d42 | 198 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); |
016e0d42 | 199 | static void pobegin PARAMS ((void)); |
fecd2382 | 200 | \f |
6efd877d | 201 | |
016e0d42 ILT |
202 | void |
203 | read_begin () | |
fecd2382 | 204 | { |
016e0d42 | 205 | const char *p; |
f8701a3f | 206 | |
6efd877d KR |
207 | pobegin (); |
208 | obj_read_begin_hook (); | |
f8701a3f | 209 | |
4380166d KR |
210 | /* Something close -- but not too close -- to a multiple of 1024. |
211 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
212 | obstack_begin (¬es, 5090); | |
213 | obstack_begin (&cond_obstack, 990); | |
f8701a3f | 214 | |
f8701a3f SC |
215 | /* Use machine dependent syntax */ |
216 | for (p = line_separator_chars; *p; p++) | |
58d4951d | 217 | is_end_of_line[(unsigned char) *p] = 1; |
f8701a3f | 218 | /* Use more. FIXME-SOMEDAY. */ |
1356d77d ILT |
219 | |
220 | if (flag_mri) | |
221 | lex_type['?'] = 3; | |
fecd2382 RP |
222 | } |
223 | \f | |
224 | /* set up pseudo-op tables */ | |
225 | ||
1356d77d | 226 | static struct hash_control *po_hash; |
fecd2382 | 227 | |
016e0d42 | 228 | static const pseudo_typeS potable[] = |
fecd2382 | 229 | { |
6efd877d KR |
230 | {"abort", s_abort, 0}, |
231 | {"align", s_align_ptwo, 0}, | |
232 | {"ascii", stringer, 0}, | |
233 | {"asciz", stringer, 1}, | |
931a8fab | 234 | {"balign", s_align_bytes, 0}, |
f8701a3f | 235 | /* block */ |
6efd877d KR |
236 | {"byte", cons, 1}, |
237 | {"comm", s_comm, 0}, | |
1356d77d ILT |
238 | {"common", s_mri_common, 0}, |
239 | {"common.s", s_mri_common, 1}, | |
6efd877d | 240 | {"data", s_data, 0}, |
1356d77d ILT |
241 | {"dc", cons, 2}, |
242 | {"dc.b", cons, 1}, | |
243 | {"dc.d", float_cons, 'd'}, | |
244 | {"dc.l", cons, 4}, | |
245 | {"dc.s", float_cons, 'f'}, | |
246 | {"dc.w", cons, 2}, | |
247 | {"dc.x", float_cons, 'x'}, | |
e28c40d7 ILT |
248 | {"dcb", s_space, 2}, |
249 | {"dcb.b", s_space, 1}, | |
250 | {"dcb.d", s_float_space, 'd'}, | |
251 | {"dcb.l", s_space, 4}, | |
252 | {"dcb.s", s_float_space, 'f'}, | |
253 | {"dcb.w", s_space, 2}, | |
254 | {"dcb.x", s_float_space, 'x'}, | |
1356d77d ILT |
255 | {"ds", s_space, 2}, |
256 | {"ds.b", s_space, 1}, | |
e28c40d7 | 257 | {"ds.d", s_space, 8}, |
1356d77d | 258 | {"ds.l", s_space, 4}, |
e28c40d7 ILT |
259 | {"ds.p", s_space, 12}, |
260 | {"ds.s", s_space, 4}, | |
1356d77d | 261 | {"ds.w", s_space, 2}, |
e28c40d7 | 262 | {"ds.x", s_space, 12}, |
604633ae | 263 | #ifdef S_SET_DESC |
4064305e | 264 | {"desc", s_desc, 0}, |
604633ae | 265 | #endif |
f8701a3f | 266 | /* dim */ |
6efd877d | 267 | {"double", float_cons, 'd'}, |
f8701a3f | 268 | /* dsect */ |
6efd877d KR |
269 | {"eject", listing_eject, 0}, /* Formfeed listing */ |
270 | {"else", s_else, 0}, | |
e28c40d7 | 271 | {"elsec", s_else, 0}, |
6efd877d | 272 | {"end", s_end, 0}, |
e28c40d7 | 273 | {"endc", s_endif, 0}, |
6efd877d | 274 | {"endif", s_endif, 0}, |
f8701a3f | 275 | /* endef */ |
6efd877d | 276 | {"equ", s_set, 0}, |
f8701a3f SC |
277 | /* err */ |
278 | /* extend */ | |
6efd877d | 279 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ |
9a7d824a ILT |
280 | {"appfile", s_app_file, 1}, |
281 | {"appline", s_app_line, 0}, | |
e28c40d7 | 282 | {"fail", s_fail, 0}, |
6efd877d KR |
283 | {"file", s_app_file, 0}, |
284 | {"fill", s_fill, 0}, | |
285 | {"float", float_cons, 'f'}, | |
e28c40d7 | 286 | {"format", s_ignore, 0}, |
6efd877d KR |
287 | {"global", s_globl, 0}, |
288 | {"globl", s_globl, 0}, | |
289 | {"hword", cons, 2}, | |
e28c40d7 | 290 | {"if", s_if, (int) O_ne}, |
6efd877d | 291 | {"ifdef", s_ifdef, 0}, |
e28c40d7 | 292 | {"ifeq", s_if, (int) O_eq}, |
6efd877d | 293 | {"ifeqs", s_ifeqs, 0}, |
e28c40d7 ILT |
294 | {"ifge", s_if, (int) O_ge}, |
295 | {"ifgt", s_if, (int) O_gt}, | |
296 | {"ifle", s_if, (int) O_le}, | |
297 | {"iflt", s_if, (int) O_lt}, | |
6efd877d | 298 | {"ifndef", s_ifdef, 1}, |
e28c40d7 | 299 | {"ifne", s_if, (int) O_ne}, |
6efd877d KR |
300 | {"ifnes", s_ifeqs, 1}, |
301 | {"ifnotdef", s_ifdef, 1}, | |
302 | {"include", s_include, 0}, | |
303 | {"int", cons, 4}, | |
304 | {"lcomm", s_lcomm, 0}, | |
305 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
306 | {"list", listing_list, 1}, /* Turn listing on */ | |
e28c40d7 | 307 | {"llen", listing_psize, 1}, |
6efd877d KR |
308 | {"long", cons, 4}, |
309 | {"lsym", s_lsym, 0}, | |
e28c40d7 | 310 | {"noformat", s_ignore, 0}, |
6efd877d | 311 | {"nolist", listing_list, 0}, /* Turn listing off */ |
69e077f3 | 312 | {"nopage", listing_nopage, 0}, |
80aab579 | 313 | {"octa", cons, 16}, |
e28c40d7 | 314 | {"offset", s_struct, 0}, |
6efd877d | 315 | {"org", s_org, 0}, |
931a8fab | 316 | {"p2align", s_align_ptwo, 0}, |
69e077f3 ILT |
317 | {"page", listing_eject, 0}, |
318 | {"plen", listing_psize, 0}, | |
6efd877d | 319 | {"psize", listing_psize, 0}, /* set paper size */ |
f8701a3f | 320 | /* print */ |
80aab579 | 321 | {"quad", cons, 8}, |
6efd877d | 322 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ |
f8701a3f SC |
323 | /* scl */ |
324 | /* sect */ | |
6efd877d KR |
325 | {"set", s_set, 0}, |
326 | {"short", cons, 2}, | |
327 | {"single", float_cons, 'f'}, | |
f8701a3f | 328 | /* size */ |
6efd877d | 329 | {"space", s_space, 0}, |
e14994d9 | 330 | {"spc", s_ignore, 0}, |
4064305e SS |
331 | {"stabd", s_stab, 'd'}, |
332 | {"stabn", s_stab, 'n'}, | |
333 | {"stabs", s_stab, 's'}, | |
ba71c54d | 334 | {"string", stringer, 1}, |
e28c40d7 | 335 | {"struct", s_struct, 0}, |
f8701a3f | 336 | /* tag */ |
6efd877d | 337 | {"text", s_text, 0}, |
6ef37255 KR |
338 | |
339 | /* This is for gcc to use. It's only just been added (2/94), so gcc | |
340 | won't be able to use it for a while -- probably a year or more. | |
341 | But once this has been released, check with gcc maintainers | |
342 | before deleting it or even changing the spelling. */ | |
343 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, | |
344 | /* If we're folding case -- done for some targets, not necessarily | |
345 | all -- the above string in an input file will be converted to | |
346 | this one. Match it either way... */ | |
347 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, | |
348 | ||
6efd877d | 349 | {"title", listing_title, 0}, /* Listing title */ |
e14994d9 | 350 | {"ttl", listing_title, 0}, |
f8701a3f SC |
351 | /* type */ |
352 | /* use */ | |
353 | /* val */ | |
e14994d9 | 354 | {"xcom", s_comm, 0}, |
1356d77d | 355 | {"xdef", s_globl, 0}, |
e14994d9 | 356 | {"xref", s_ignore, 0}, |
4064305e | 357 | {"xstabs", s_xstab, 's'}, |
6efd877d | 358 | {"word", cons, 2}, |
c02fd8dc | 359 | {"zero", s_space, 0}, |
6efd877d | 360 | {NULL} /* end sentinel */ |
fecd2382 RP |
361 | }; |
362 | ||
2209b19c KR |
363 | static int pop_override_ok = 0; |
364 | static const char *pop_table_name; | |
365 | ||
366 | void | |
367 | pop_insert (table) | |
368 | const pseudo_typeS *table; | |
6efd877d | 369 | { |
2209b19c | 370 | const char *errtxt; |
6efd877d | 371 | const pseudo_typeS *pop; |
2209b19c KR |
372 | for (pop = table; pop->poc_name; pop++) |
373 | { | |
374 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
375 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) | |
376 | as_fatal ("error constructing %s pseudo-op table", pop_table_name); | |
377 | } | |
378 | } | |
6efd877d | 379 | |
2209b19c KR |
380 | #ifndef md_pop_insert |
381 | #define md_pop_insert() pop_insert(md_pseudo_table) | |
382 | #endif | |
383 | ||
384 | #ifndef obj_pop_insert | |
385 | #define obj_pop_insert() pop_insert(obj_pseudo_table) | |
386 | #endif | |
387 | ||
388 | static void | |
389 | pobegin () | |
390 | { | |
6efd877d KR |
391 | po_hash = hash_new (); |
392 | ||
393 | /* Do the target-specific pseudo ops. */ | |
2209b19c KR |
394 | pop_table_name = "md"; |
395 | md_pop_insert (); | |
6efd877d KR |
396 | |
397 | /* Now object specific. Skip any that were in the target table. */ | |
2209b19c KR |
398 | pop_table_name = "obj"; |
399 | pop_override_ok = 1; | |
400 | obj_pop_insert (); | |
6efd877d KR |
401 | |
402 | /* Now portable ones. Skip any that we've seen already. */ | |
2209b19c KR |
403 | pop_table_name = "standard"; |
404 | pop_insert (potable); | |
405 | } | |
fecd2382 | 406 | \f |
58d4951d ILT |
407 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ |
408 | if (ignore_input ()) \ | |
409 | { \ | |
410 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
411 | if (input_line_pointer == buffer_limit) \ | |
412 | break; \ | |
413 | continue; \ | |
f8701a3f | 414 | } |
a39116f1 | 415 | |
fecd2382 RP |
416 | |
417 | /* read_a_source_file() | |
418 | * | |
419 | * We read the file, putting things into a web that | |
420 | * represents what we have been reading. | |
421 | */ | |
6efd877d KR |
422 | void |
423 | read_a_source_file (name) | |
424 | char *name; | |
fecd2382 | 425 | { |
f8701a3f | 426 | register char c; |
6efd877d | 427 | register char *s; /* string of symbol, '\0' appended */ |
f8701a3f | 428 | register int temp; |
6efd877d | 429 | pseudo_typeS *pop; |
f8701a3f | 430 | |
6efd877d | 431 | buffer = input_scrub_new_file (name); |
f8701a3f | 432 | |
6efd877d KR |
433 | listing_file (name); |
434 | listing_newline (""); | |
f8701a3f | 435 | |
6efd877d KR |
436 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) |
437 | { /* We have another line to parse. */ | |
438 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
9471a360 KR |
439 | contin: /* JF this goto is my fault I admit it. |
440 | Someone brave please re-write the whole | |
441 | input section here? Pleeze??? */ | |
6efd877d | 442 | while (input_line_pointer < buffer_limit) |
9471a360 KR |
443 | { |
444 | /* We have more of this buffer to parse. */ | |
f8701a3f SC |
445 | |
446 | /* | |
447 | * We now have input_line_pointer->1st char of next line. | |
448 | * If input_line_pointer [-1] == '\n' then we just | |
449 | * scanned another line: so bump line counters. | |
450 | */ | |
d2550c72 | 451 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) |
6efd877d | 452 | { |
a2a5a4fa KR |
453 | #ifdef md_start_line_hook |
454 | md_start_line_hook (); | |
455 | #endif | |
456 | ||
385ce433 JL |
457 | if (input_line_pointer[-1] == '\n') |
458 | bump_line_counters (); | |
f8701a3f | 459 | |
1356d77d ILT |
460 | if (flag_mri |
461 | #ifdef LABELS_WITHOUT_COLONS | |
462 | || 1 | |
463 | #endif | |
464 | ) | |
6efd877d | 465 | { |
1356d77d ILT |
466 | mri_line_label = NULL; |
467 | ||
468 | /* Text at the start of a line must be a label, we | |
469 | run down and stick a colon in. */ | |
470 | if (is_name_beginner (*input_line_pointer)) | |
471 | { | |
472 | char *line_start = input_line_pointer; | |
473 | char c = get_symbol_end (); | |
474 | ||
e28c40d7 | 475 | if (! ignore_input ()) |
1356d77d | 476 | { |
e28c40d7 ILT |
477 | /* In MRI mode, the EQU pseudoop must be |
478 | handled specially. */ | |
479 | if (flag_mri) | |
1356d77d | 480 | { |
e28c40d7 ILT |
481 | if (((strncasecmp (input_line_pointer + 1, |
482 | "EQU", 3) == 0) | |
483 | || (strncasecmp (input_line_pointer + 1, | |
484 | "SET", 3) == 0)) | |
485 | && (input_line_pointer[4] == ' ' | |
486 | || input_line_pointer[4] == '\t')) | |
487 | { | |
488 | input_line_pointer += 4; | |
489 | equals (line_start); | |
490 | continue; | |
491 | } | |
1356d77d | 492 | } |
e28c40d7 ILT |
493 | |
494 | mri_line_label = colon (line_start); | |
1356d77d | 495 | } |
6efd877d | 496 | |
1356d77d ILT |
497 | *input_line_pointer = c; |
498 | if (c == ':') | |
499 | input_line_pointer++; | |
500 | } | |
6efd877d | 501 | } |
9471a360 | 502 | } |
f8701a3f | 503 | |
f8701a3f SC |
504 | /* |
505 | * We are at the begining of a line, or similar place. | |
506 | * We expect a well-formed assembler statement. | |
507 | * A "symbol-name:" is a statement. | |
508 | * | |
509 | * Depending on what compiler is used, the order of these tests | |
510 | * may vary to catch most common case 1st. | |
511 | * Each test is independent of all other tests at the (top) level. | |
512 | * PLEASE make a compiler that doesn't use this assembler. | |
513 | * It is crufty to waste a compiler's time encoding things for this | |
514 | * assembler, which then wastes more time decoding it. | |
515 | * (And communicating via (linear) files is silly! | |
516 | * If you must pass stuff, please pass a tree!) | |
517 | */ | |
9471a360 KR |
518 | if ((c = *input_line_pointer++) == '\t' |
519 | || c == ' ' | |
520 | || c == '\f' | |
521 | || c == 0) | |
6efd877d KR |
522 | { |
523 | c = *input_line_pointer++; | |
524 | } | |
525 | know (c != ' '); /* No further leading whitespace. */ | |
526 | LISTING_NEWLINE (); | |
f8701a3f SC |
527 | /* |
528 | * C is the 1st significant character. | |
529 | * Input_line_pointer points after that character. | |
530 | */ | |
6efd877d | 531 | if (is_name_beginner (c)) |
6ef37255 KR |
532 | { |
533 | /* want user-defined label or pseudo/opcode */ | |
6efd877d KR |
534 | HANDLE_CONDITIONAL_ASSEMBLY (); |
535 | ||
f8701a3f | 536 | s = --input_line_pointer; |
6efd877d | 537 | c = get_symbol_end (); /* name's delimiter */ |
f8701a3f SC |
538 | /* |
539 | * C is character after symbol. | |
540 | * That character's place in the input line is now '\0'. | |
541 | * S points to the beginning of the symbol. | |
542 | * [In case of pseudo-op, s->'.'.] | |
543 | * Input_line_pointer->'\0' where c was. | |
544 | */ | |
9a7d824a | 545 | if (TC_START_LABEL(c, input_line_pointer)) |
6efd877d KR |
546 | { |
547 | colon (s); /* user-defined label */ | |
548 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ | |
f8701a3f | 549 | /* Input_line_pointer->after ':'. */ |
6efd877d KR |
550 | SKIP_WHITESPACE (); |
551 | ||
f8701a3f | 552 | |
6efd877d | 553 | } |
4064305e SS |
554 | else if (c == '=' |
555 | || (input_line_pointer[1] == '=' | |
556 | #ifdef TC_EQUAL_IN_INSN | |
557 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
558 | #endif | |
559 | )) | |
9c6d3f66 | 560 | { |
6efd877d KR |
561 | equals (s); |
562 | demand_empty_rest_of_line (); | |
563 | } | |
564 | else | |
565 | { /* expect pseudo-op or machine instruction */ | |
8ff6f40e ILT |
566 | pop = NULL; |
567 | ||
d4c8cbd8 JL |
568 | #define IGNORE_OPCODE_CASE |
569 | #ifdef IGNORE_OPCODE_CASE | |
570 | { | |
571 | char *s2 = s; | |
572 | while (*s2) | |
573 | { | |
574 | if (isupper (*s2)) | |
575 | *s2 = tolower (*s2); | |
576 | s2++; | |
577 | } | |
578 | } | |
579 | #endif | |
580 | ||
1356d77d | 581 | if (flag_mri |
8ff6f40e | 582 | #ifdef NO_PSEUDO_DOT |
1356d77d | 583 | || 1 |
8ff6f40e | 584 | #endif |
1356d77d ILT |
585 | ) |
586 | { | |
587 | /* The MRI assembler and the m88k use pseudo-ops | |
588 | without a period. */ | |
589 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
590 | if (pop != NULL && pop->poc_handler == NULL) | |
591 | pop = NULL; | |
592 | } | |
8ff6f40e ILT |
593 | |
594 | if (pop != NULL || *s == '.') | |
6efd877d KR |
595 | { |
596 | /* | |
9471a360 KR |
597 | * PSEUDO - OP. |
598 | * | |
599 | * WARNING: c has next char, which may be end-of-line. | |
600 | * We lookup the pseudo-op table with s+1 because we | |
601 | * already know that the pseudo-op begins with a '.'. | |
602 | */ | |
6efd877d | 603 | |
8ff6f40e ILT |
604 | if (pop == NULL) |
605 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
6efd877d | 606 | |
286cb27a ILT |
607 | /* In MRI mode, we may need to insert an |
608 | automatic alignment directive. What a hack | |
609 | this is. */ | |
610 | if (mri_pending_align | |
611 | && (pop == NULL | |
612 | || ! ((pop->poc_handler == cons | |
613 | && pop->poc_val == 1) | |
614 | || (pop->poc_handler == s_space | |
615 | && pop->poc_val == 1)))) | |
616 | { | |
617 | do_align (1, (char *) NULL); | |
618 | mri_pending_align = 0; | |
619 | } | |
620 | ||
6efd877d | 621 | /* Print the error msg now, while we still can */ |
8ff6f40e | 622 | if (pop == NULL) |
6efd877d KR |
623 | { |
624 | as_bad ("Unknown pseudo-op: `%s'", s); | |
f8701a3f | 625 | *input_line_pointer = c; |
6efd877d | 626 | s_ignore (0); |
46b81190 | 627 | continue; |
6efd877d KR |
628 | } |
629 | ||
630 | /* Put it back for error messages etc. */ | |
631 | *input_line_pointer = c; | |
9c6d3f66 KR |
632 | /* The following skip of whitespace is compulsory. |
633 | A well shaped space is sometimes all that separates | |
634 | keyword from operands. */ | |
6efd877d | 635 | if (c == ' ' || c == '\t') |
d4c8cbd8 | 636 | input_line_pointer++; |
6efd877d | 637 | /* |
9471a360 KR |
638 | * Input_line is restored. |
639 | * Input_line_pointer->1st non-blank char | |
640 | * after pseudo-operation. | |
641 | */ | |
46b81190 | 642 | (*pop->poc_handler) (pop->poc_val); |
e28c40d7 ILT |
643 | |
644 | /* If that was .end, just get out now. */ | |
645 | if (pop->poc_handler == s_end) | |
646 | goto quit; | |
6efd877d KR |
647 | } |
648 | else | |
6efd877d | 649 | { /* machine instruction */ |
286cb27a ILT |
650 | if (mri_pending_align) |
651 | { | |
652 | do_align (1, (char *) NULL); | |
653 | mri_pending_align = 0; | |
654 | } | |
655 | ||
6efd877d KR |
656 | /* WARNING: c has char, which may be end-of-line. */ |
657 | /* Also: input_line_pointer->`\0` where c was. */ | |
658 | *input_line_pointer = c; | |
58d4951d | 659 | while (!is_end_of_line[(unsigned char) *input_line_pointer] |
4064305e SS |
660 | #ifdef TC_EOL_IN_INSN |
661 | || TC_EOL_IN_INSN (input_line_pointer) | |
662 | #endif | |
663 | ) | |
6efd877d KR |
664 | { |
665 | input_line_pointer++; | |
666 | } | |
f8701a3f | 667 | |
6efd877d KR |
668 | c = *input_line_pointer; |
669 | *input_line_pointer = '\0'; | |
f8701a3f | 670 | |
326d16ca KH |
671 | #ifdef OBJ_GENERATE_ASM_LINENO |
672 | if (generate_asm_lineno == 0) | |
673 | { | |
f10a96cb | 674 | if (ecoff_no_current_file ()) |
326d16ca KH |
675 | generate_asm_lineno = 1; |
676 | } | |
f10a96cb ILT |
677 | if (generate_asm_lineno == 1) |
678 | { | |
1b434ced ILT |
679 | unsigned int lineno; |
680 | char *s; | |
681 | ||
daad3bbf | 682 | as_where (&s, &lineno); |
326d16ca | 683 | OBJ_GENERATE_ASM_LINENO (s, lineno); |
f10a96cb | 684 | } |
daad3bbf KH |
685 | #endif |
686 | ||
6efd877d | 687 | md_assemble (s); /* Assemble 1 instruction. */ |
f8701a3f | 688 | |
6efd877d | 689 | *input_line_pointer++ = c; |
f8701a3f | 690 | |
d4c8cbd8 JL |
691 | /* We resume loop AFTER the end-of-line from |
692 | this instruction. */ | |
6efd877d | 693 | } /* if (*s=='.') */ |
6efd877d | 694 | } /* if c==':' */ |
f8701a3f | 695 | continue; |
6efd877d | 696 | } /* if (is_name_beginner(c) */ |
f8701a3f | 697 | |
f8701a3f | 698 | |
d4c8cbd8 | 699 | /* Empty statement? */ |
58d4951d | 700 | if (is_end_of_line[(unsigned char) c]) |
d4c8cbd8 | 701 | continue; |
6efd877d | 702 | |
9777b772 KR |
703 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) |
704 | && isdigit (c)) | |
d4c8cbd8 JL |
705 | { |
706 | /* local label ("4:") */ | |
6efd877d KR |
707 | char *backup = input_line_pointer; |
708 | ||
709 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
710 | ||
711 | temp = c - '0'; | |
712 | ||
713 | while (isdigit (*input_line_pointer)) | |
714 | { | |
715 | temp = (temp * 10) + *input_line_pointer - '0'; | |
716 | ++input_line_pointer; | |
717 | } /* read the whole number */ | |
718 | ||
9777b772 KR |
719 | if (LOCAL_LABELS_DOLLAR |
720 | && *input_line_pointer == '$' | |
6efd877d KR |
721 | && *(input_line_pointer + 1) == ':') |
722 | { | |
723 | input_line_pointer += 2; | |
724 | ||
725 | if (dollar_label_defined (temp)) | |
726 | { | |
727 | as_fatal ("label \"%d$\" redefined", temp); | |
728 | } | |
729 | ||
730 | define_dollar_label (temp); | |
731 | colon (dollar_label_name (temp, 0)); | |
732 | continue; | |
733 | } | |
6efd877d | 734 | |
9777b772 KR |
735 | if (LOCAL_LABELS_FB |
736 | && *input_line_pointer++ == ':') | |
6efd877d KR |
737 | { |
738 | fb_label_instance_inc (temp); | |
739 | colon (fb_label_name (temp, 0)); | |
740 | continue; | |
741 | } | |
6efd877d KR |
742 | |
743 | input_line_pointer = backup; | |
744 | } /* local label ("4:") */ | |
f8701a3f | 745 | |
6efd877d KR |
746 | if (c && strchr (line_comment_chars, c)) |
747 | { /* Its a comment. Better say APP or NO_APP */ | |
f8701a3f SC |
748 | char *ends; |
749 | char *new_buf; | |
750 | char *new_tmp; | |
604633ae | 751 | unsigned int new_length; |
f8701a3f | 752 | char *tmp_buf = 0; |
6efd877d KR |
753 | extern char *scrub_string, *scrub_last_string; |
754 | ||
755 | bump_line_counters (); | |
756 | s = input_line_pointer; | |
757 | if (strncmp (s, "APP\n", 4)) | |
758 | continue; /* We ignore it */ | |
759 | s += 4; | |
760 | ||
761 | ends = strstr (s, "#NO_APP\n"); | |
762 | ||
763 | if (!ends) | |
764 | { | |
604633ae ILT |
765 | unsigned int tmp_len; |
766 | unsigned int num; | |
6efd877d | 767 | |
f8701a3f SC |
768 | /* The end of the #APP wasn't in this buffer. We |
769 | keep reading in buffers until we find the #NO_APP | |
770 | that goes with this #APP There is one. The specs | |
771 | guarentee it. . . */ | |
6efd877d | 772 | tmp_len = buffer_limit - s; |
85825401 | 773 | tmp_buf = xmalloc (tmp_len + 1); |
4380166d | 774 | memcpy (tmp_buf, s, tmp_len); |
6efd877d KR |
775 | do |
776 | { | |
777 | new_tmp = input_scrub_next_buffer (&buffer); | |
f8701a3f | 778 | if (!new_tmp) |
6efd877d | 779 | break; |
f8701a3f | 780 | else |
6efd877d | 781 | buffer_limit = new_tmp; |
f8701a3f | 782 | input_line_pointer = buffer; |
6efd877d | 783 | ends = strstr (buffer, "#NO_APP\n"); |
f8701a3f | 784 | if (ends) |
6efd877d | 785 | num = ends - buffer; |
f8701a3f | 786 | else |
6efd877d KR |
787 | num = buffer_limit - buffer; |
788 | ||
789 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
9eb5f4b8 | 790 | memcpy (tmp_buf + tmp_len, buffer, num); |
6efd877d KR |
791 | tmp_len += num; |
792 | } | |
793 | while (!ends); | |
794 | ||
795 | input_line_pointer = ends ? ends + 8 : NULL; | |
796 | ||
797 | s = tmp_buf; | |
798 | ends = s + tmp_len; | |
799 | ||
800 | } | |
801 | else | |
802 | { | |
803 | input_line_pointer = ends + 8; | |
804 | } | |
805 | new_buf = xmalloc (100); | |
806 | new_length = 100; | |
807 | new_tmp = new_buf; | |
808 | ||
809 | scrub_string = s; | |
f8701a3f | 810 | scrub_last_string = ends; |
6efd877d KR |
811 | for (;;) |
812 | { | |
f8701a3f SC |
813 | int ch; |
814 | ||
6efd877d KR |
815 | ch = do_scrub_next_char (scrub_from_string, scrub_to_string); |
816 | if (ch == EOF) | |
817 | break; | |
818 | *new_tmp++ = ch; | |
819 | if (new_tmp == new_buf + new_length) | |
820 | { | |
821 | new_buf = xrealloc (new_buf, new_length + 100); | |
822 | new_tmp = new_buf + new_length; | |
823 | new_length += 100; | |
f8701a3f | 824 | } |
fecd2382 | 825 | } |
f8701a3f SC |
826 | |
827 | if (tmp_buf) | |
6efd877d KR |
828 | free (tmp_buf); |
829 | old_buffer = buffer; | |
830 | old_input = input_line_pointer; | |
831 | old_limit = buffer_limit; | |
832 | buffer = new_buf; | |
833 | input_line_pointer = new_buf; | |
834 | buffer_limit = new_tmp; | |
f8701a3f SC |
835 | continue; |
836 | } | |
837 | ||
6efd877d | 838 | HANDLE_CONDITIONAL_ASSEMBLY (); |
f8701a3f SC |
839 | |
840 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
841 | input_line_pointer--; /* Report unknown char as ignored. */ | |
6efd877d KR |
842 | ignore_rest_of_line (); |
843 | } /* while (input_line_pointer<buffer_limit) */ | |
a2a5a4fa KR |
844 | |
845 | #ifdef md_after_pass_hook | |
846 | md_after_pass_hook (); | |
847 | #endif | |
848 | ||
6efd877d KR |
849 | if (old_buffer) |
850 | { | |
851 | bump_line_counters (); | |
852 | if (old_input != 0) | |
853 | { | |
854 | buffer = old_buffer; | |
855 | input_line_pointer = old_input; | |
856 | buffer_limit = old_limit; | |
f8701a3f SC |
857 | old_buffer = 0; |
858 | goto contin; | |
859 | } | |
860 | } | |
6efd877d | 861 | } /* while (more buffers to scan) */ |
f8701a3f | 862 | |
e28c40d7 ILT |
863 | quit: |
864 | input_scrub_close (); /* Close the input file */ | |
4075afe1 | 865 | } |
fecd2382 | 866 | |
6efd877d | 867 | void |
604633ae ILT |
868 | s_abort (ignore) |
869 | int ignore; | |
6efd877d KR |
870 | { |
871 | as_fatal (".abort detected. Abandoning ship."); | |
4075afe1 KR |
872 | } |
873 | ||
874 | /* Guts of .align directive. */ | |
875 | static void | |
876 | do_align (n, fill) | |
877 | int n; | |
878 | char *fill; | |
879 | { | |
880 | #ifdef md_do_align | |
881 | md_do_align (n, fill, just_record_alignment); | |
882 | #endif | |
883 | if (!fill) | |
884 | { | |
885 | /* @@ Fix this right for BFD! */ | |
886 | static char zero; | |
887 | static char nop_opcode = NOP_OPCODE; | |
888 | ||
889 | if (now_seg != data_section && now_seg != bss_section) | |
890 | { | |
891 | fill = &nop_opcode; | |
892 | } | |
893 | else | |
894 | { | |
895 | fill = &zero; | |
896 | } | |
897 | } | |
898 | /* Only make a frag if we HAVE to. . . */ | |
899 | if (n && !need_pass_2) | |
900 | frag_align (n, *fill); | |
901 | ||
c02fd8dc | 902 | #ifdef md_do_align |
4075afe1 | 903 | just_record_alignment: |
c02fd8dc ILT |
904 | #endif |
905 | ||
4075afe1 KR |
906 | record_alignment (now_seg, n); |
907 | } | |
fecd2382 RP |
908 | |
909 | /* For machines where ".align 4" means align to a 4 byte boundary. */ | |
6efd877d KR |
910 | void |
911 | s_align_bytes (arg) | |
912 | int arg; | |
fecd2382 | 913 | { |
6efd877d | 914 | register unsigned int temp; |
4075afe1 | 915 | char temp_fill; |
6efd877d KR |
916 | unsigned int i = 0; |
917 | unsigned long max_alignment = 1 << 15; | |
f8701a3f | 918 | |
58d4951d | 919 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
920 | temp = arg; /* Default value from pseudo-op table */ |
921 | else | |
922 | temp = get_absolute_expression (); | |
f8701a3f | 923 | |
6efd877d KR |
924 | if (temp > max_alignment) |
925 | { | |
926 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
f8701a3f SC |
927 | } |
928 | ||
4075afe1 KR |
929 | /* For the sparc, `.align (1<<n)' actually means `.align n' so we |
930 | have to convert it. */ | |
6efd877d KR |
931 | if (temp != 0) |
932 | { | |
933 | for (i = 0; (temp & 1) == 0; temp >>= 1, ++i) | |
934 | ; | |
f8701a3f | 935 | } |
6efd877d KR |
936 | if (temp != 1) |
937 | as_bad ("Alignment not a power of 2"); | |
f8701a3f | 938 | |
6efd877d KR |
939 | temp = i; |
940 | if (*input_line_pointer == ',') | |
941 | { | |
942 | input_line_pointer++; | |
943 | temp_fill = get_absolute_expression (); | |
4075afe1 | 944 | do_align (temp, &temp_fill); |
f8701a3f | 945 | } |
6efd877d | 946 | else |
4075afe1 | 947 | do_align (temp, (char *) 0); |
49864cfa | 948 | |
6efd877d | 949 | demand_empty_rest_of_line (); |
4075afe1 | 950 | } |
fecd2382 RP |
951 | |
952 | /* For machines where ".align 4" means align to 2**4 boundary. */ | |
6efd877d | 953 | void |
604633ae ILT |
954 | s_align_ptwo (ignore) |
955 | int ignore; | |
6efd877d KR |
956 | { |
957 | register int temp; | |
4075afe1 | 958 | char temp_fill; |
6efd877d KR |
959 | long max_alignment = 15; |
960 | ||
961 | temp = get_absolute_expression (); | |
962 | if (temp > max_alignment) | |
963 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
964 | else if (temp < 0) | |
965 | { | |
966 | as_bad ("Alignment negative. 0 assumed."); | |
967 | temp = 0; | |
968 | } | |
969 | if (*input_line_pointer == ',') | |
970 | { | |
971 | input_line_pointer++; | |
972 | temp_fill = get_absolute_expression (); | |
4075afe1 | 973 | do_align (temp, &temp_fill); |
6efd877d KR |
974 | } |
975 | else | |
4075afe1 | 976 | do_align (temp, (char *) 0); |
6efd877d KR |
977 | |
978 | demand_empty_rest_of_line (); | |
4075afe1 | 979 | } |
6efd877d KR |
980 | |
981 | void | |
604633ae ILT |
982 | s_comm (ignore) |
983 | int ignore; | |
6efd877d KR |
984 | { |
985 | register char *name; | |
986 | register char c; | |
987 | register char *p; | |
58d4951d | 988 | offsetT temp; |
6efd877d KR |
989 | register symbolS *symbolP; |
990 | ||
991 | name = input_line_pointer; | |
992 | c = get_symbol_end (); | |
993 | /* just after name is now '\0' */ | |
994 | p = input_line_pointer; | |
995 | *p = c; | |
996 | SKIP_WHITESPACE (); | |
997 | if (*input_line_pointer != ',') | |
998 | { | |
999 | as_bad ("Expected comma after symbol-name: rest of line ignored."); | |
1000 | ignore_rest_of_line (); | |
1001 | return; | |
1002 | } | |
1003 | input_line_pointer++; /* skip ',' */ | |
1004 | if ((temp = get_absolute_expression ()) < 0) | |
1005 | { | |
58d4951d | 1006 | as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp); |
6efd877d KR |
1007 | ignore_rest_of_line (); |
1008 | return; | |
1009 | } | |
1010 | *p = 0; | |
1011 | symbolP = symbol_find_or_make (name); | |
1012 | *p = c; | |
1013 | if (S_IS_DEFINED (symbolP)) | |
1014 | { | |
6ef37255 KR |
1015 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
1016 | S_GET_NAME (symbolP)); | |
6efd877d KR |
1017 | ignore_rest_of_line (); |
1018 | return; | |
1019 | } | |
1020 | if (S_GET_VALUE (symbolP)) | |
1021 | { | |
58d4951d ILT |
1022 | if (S_GET_VALUE (symbolP) != (valueT) temp) |
1023 | as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.", | |
6efd877d | 1024 | S_GET_NAME (symbolP), |
58d4951d ILT |
1025 | (long) S_GET_VALUE (symbolP), |
1026 | (long) temp); | |
6efd877d KR |
1027 | } |
1028 | else | |
1029 | { | |
58d4951d | 1030 | S_SET_VALUE (symbolP, (valueT) temp); |
6efd877d KR |
1031 | S_SET_EXTERNAL (symbolP); |
1032 | } | |
9471a360 | 1033 | #ifdef OBJ_VMS |
def66e24 DM |
1034 | { |
1035 | extern int flag_one; | |
1036 | if ( (!temp) || !flag_one) | |
1037 | S_GET_OTHER(symbolP) = const_flag; | |
1038 | } | |
9471a360 | 1039 | #endif /* not OBJ_VMS */ |
6efd877d KR |
1040 | know (symbolP->sy_frag == &zero_address_frag); |
1041 | demand_empty_rest_of_line (); | |
1042 | } /* s_comm() */ | |
fecd2382 | 1043 | |
1356d77d ILT |
1044 | /* The MRI COMMON pseudo-op. We handle this by creating a common |
1045 | symbol with the appropriate name. We make s_space do the right | |
1046 | thing by increasing the size. */ | |
1047 | ||
1048 | void | |
1049 | s_mri_common (small) | |
1050 | int small; | |
1051 | { | |
1052 | char *name; | |
1053 | char c; | |
1054 | char *alc = NULL; | |
1055 | symbolS *sym; | |
1056 | offsetT align; | |
1057 | ||
1058 | if (! flag_mri) | |
1059 | { | |
1060 | s_comm (0); | |
1061 | return; | |
1062 | } | |
1063 | ||
1064 | SKIP_WHITESPACE (); | |
1065 | ||
1066 | name = input_line_pointer; | |
1067 | if (! isdigit ((unsigned char) *name)) | |
1068 | c = get_symbol_end (); | |
1069 | else | |
1070 | { | |
1071 | do | |
1072 | { | |
1073 | ++input_line_pointer; | |
1074 | } | |
1075 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1076 | c = *input_line_pointer; | |
1077 | *input_line_pointer = '\0'; | |
1078 | ||
1079 | if (mri_line_label != NULL) | |
1080 | { | |
1081 | alc = (char *) xmalloc (strlen (S_GET_NAME (mri_line_label)) | |
1082 | + (input_line_pointer - name) | |
1083 | + 1); | |
1084 | sprintf (alc, "%s%s", name, S_GET_NAME (mri_line_label)); | |
1085 | name = alc; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | sym = symbol_find_or_make (name); | |
1090 | *input_line_pointer = c; | |
1091 | if (alc != NULL) | |
1092 | free (alc); | |
1093 | ||
1094 | if (*input_line_pointer != ',') | |
1095 | align = 0; | |
1096 | else | |
1097 | { | |
1098 | ++input_line_pointer; | |
1099 | align = get_absolute_expression (); | |
1100 | } | |
1101 | ||
1102 | if (S_IS_DEFINED (sym)) | |
1103 | { | |
1104 | #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER) | |
1105 | if (! S_IS_COMMON (sym)) | |
1106 | #endif | |
1107 | { | |
1108 | as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym)); | |
1109 | ignore_rest_of_line (); | |
1110 | return; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | S_SET_EXTERNAL (sym); | |
1115 | mri_common_symbol = sym; | |
1116 | ||
1117 | #ifdef S_SET_ALIGN | |
1118 | if (align != 0) | |
1119 | S_SET_ALIGN (sym, align); | |
1120 | #endif | |
1121 | ||
1122 | if (mri_line_label != NULL) | |
1123 | { | |
1124 | mri_line_label->sy_value.X_op = O_symbol; | |
1125 | mri_line_label->sy_value.X_add_symbol = sym; | |
1126 | mri_line_label->sy_value.X_add_number = S_GET_VALUE (sym); | |
1127 | mri_line_label->sy_frag = &zero_address_frag; | |
1128 | S_SET_SEGMENT (mri_line_label, expr_section); | |
1129 | } | |
1130 | ||
1131 | /* FIXME: We just ignore the small argument, which distinguishes | |
1132 | COMMON and COMMON.S. I don't know what we can do about it. */ | |
1133 | ||
1134 | /* Ignore the type and hptype. */ | |
1135 | if (*input_line_pointer == ',') | |
1136 | input_line_pointer += 2; | |
1137 | if (*input_line_pointer == ',') | |
1138 | input_line_pointer += 2; | |
1139 | demand_empty_rest_of_line (); | |
1140 | } | |
1141 | ||
fecd2382 | 1142 | void |
604633ae ILT |
1143 | s_data (ignore) |
1144 | int ignore; | |
fecd2382 | 1145 | { |
ffffc8fb | 1146 | segT section; |
6efd877d | 1147 | register int temp; |
f8701a3f | 1148 | |
6efd877d | 1149 | temp = get_absolute_expression (); |
def66e24 | 1150 | if (flag_readonly_data_in_text) |
ffffc8fb ILT |
1151 | { |
1152 | section = text_section; | |
1153 | temp += 1000; | |
1154 | } | |
1155 | else | |
1156 | section = data_section; | |
1157 | ||
ffffc8fb | 1158 | subseg_set (section, (subsegT) temp); |
f8701a3f | 1159 | |
9471a360 | 1160 | #ifdef OBJ_VMS |
6efd877d | 1161 | const_flag = 0; |
fecd2382 | 1162 | #endif |
6efd877d | 1163 | demand_empty_rest_of_line (); |
fecd2382 RP |
1164 | } |
1165 | ||
9a7d824a ILT |
1166 | /* Handle the .appfile pseudo-op. This is automatically generated by |
1167 | do_scrub_next_char when a preprocessor # line comment is seen with | |
1168 | a file name. This default definition may be overridden by the | |
1169 | object or CPU specific pseudo-ops. This function is also the | |
1170 | default definition for .file; the APPFILE argument is 1 for | |
1171 | .appfile, 0 for .file. */ | |
1172 | ||
6efd877d | 1173 | void |
9a7d824a ILT |
1174 | s_app_file (appfile) |
1175 | int appfile; | |
6efd877d KR |
1176 | { |
1177 | register char *s; | |
1178 | int length; | |
f8701a3f | 1179 | |
6efd877d KR |
1180 | /* Some assemblers tolerate immediately following '"' */ |
1181 | if ((s = demand_copy_string (&length)) != 0) | |
1182 | { | |
9a7d824a ILT |
1183 | /* If this is a fake .appfile, a fake newline was inserted into |
1184 | the buffer. Passing -2 to new_logical_line tells it to | |
1185 | account for it. */ | |
1186 | new_logical_line (s, appfile ? -2 : -1); | |
6efd877d | 1187 | demand_empty_rest_of_line (); |
9a7d824a ILT |
1188 | #ifdef LISTING |
1189 | if (listing) | |
1190 | listing_source_file (s); | |
1191 | #endif | |
6efd877d | 1192 | } |
2209b19c KR |
1193 | #ifdef obj_app_file |
1194 | obj_app_file (s); | |
40324362 KR |
1195 | #endif |
1196 | } | |
fecd2382 | 1197 | |
9a7d824a ILT |
1198 | /* Handle the .appline pseudo-op. This is automatically generated by |
1199 | do_scrub_next_char when a preprocessor # line comment is seen. | |
1200 | This default definition may be overridden by the object or CPU | |
1201 | specific pseudo-ops. */ | |
1202 | ||
1203 | void | |
604633ae ILT |
1204 | s_app_line (ignore) |
1205 | int ignore; | |
9a7d824a ILT |
1206 | { |
1207 | int l; | |
1208 | ||
1209 | /* The given number is that of the next line. */ | |
1210 | l = get_absolute_expression () - 1; | |
931a8fab KR |
1211 | if (l < 0) |
1212 | /* Some of the back ends can't deal with non-positive line numbers. | |
1213 | Besides, it's silly. */ | |
1214 | as_warn ("Line numbers must be positive; line number %d rejected.", l+1); | |
1215 | else | |
1216 | { | |
1217 | new_logical_line ((char *) NULL, l); | |
9a7d824a | 1218 | #ifdef LISTING |
931a8fab KR |
1219 | if (listing) |
1220 | listing_source_line (l); | |
9a7d824a | 1221 | #endif |
931a8fab | 1222 | } |
9a7d824a ILT |
1223 | demand_empty_rest_of_line (); |
1224 | } | |
1225 | ||
e28c40d7 ILT |
1226 | /* Handle the .end pseudo-op. Actually, the real work is done in |
1227 | read_a_source_file. */ | |
1228 | ||
1229 | void | |
1230 | s_end (ignore) | |
1231 | int ignore; | |
1232 | { | |
1233 | if (flag_mri) | |
1234 | { | |
1235 | /* The MRI assembler permits the start symbol to follow .end, | |
1236 | but we don't support that. */ | |
1237 | SKIP_WHITESPACE (); | |
1238 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1239 | as_warn ("start address not supported"); | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | /* Handle the MRI fail pseudo-op. */ | |
1244 | ||
1245 | void | |
1246 | s_fail (ignore) | |
1247 | int ignore; | |
1248 | { | |
1249 | offsetT temp; | |
1250 | ||
1251 | temp = get_absolute_expression (); | |
1252 | if (temp >= 500) | |
1253 | as_warn (".fail %ld encountered", (long) temp); | |
1254 | else | |
1255 | as_bad (".fail %ld encountered", (long) temp); | |
1256 | demand_empty_rest_of_line (); | |
1257 | } | |
1258 | ||
6efd877d | 1259 | void |
604633ae ILT |
1260 | s_fill (ignore) |
1261 | int ignore; | |
6efd877d KR |
1262 | { |
1263 | long temp_repeat = 0; | |
1264 | long temp_size = 1; | |
1265 | register long temp_fill = 0; | |
1266 | char *p; | |
f8701a3f | 1267 | |
7c2d4011 | 1268 | |
6efd877d KR |
1269 | temp_repeat = get_absolute_expression (); |
1270 | if (*input_line_pointer == ',') | |
1271 | { | |
1272 | input_line_pointer++; | |
1273 | temp_size = get_absolute_expression (); | |
1274 | if (*input_line_pointer == ',') | |
7c2d4011 SC |
1275 | { |
1276 | input_line_pointer++; | |
6efd877d | 1277 | temp_fill = get_absolute_expression (); |
fecd2382 | 1278 | } |
6efd877d | 1279 | } |
c8863a58 | 1280 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ |
fecd2382 | 1281 | #define BSD_FILL_SIZE_CROCK_8 (8) |
6efd877d KR |
1282 | if (temp_size > BSD_FILL_SIZE_CROCK_8) |
1283 | { | |
1284 | as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); | |
1285 | temp_size = BSD_FILL_SIZE_CROCK_8; | |
1286 | } | |
1287 | if (temp_size < 0) | |
1288 | { | |
1289 | as_warn ("Size negative: .fill ignored."); | |
1290 | temp_size = 0; | |
1291 | } | |
1292 | else if (temp_repeat <= 0) | |
1293 | { | |
1294 | as_warn ("Repeat < 0, .fill ignored"); | |
1295 | temp_size = 0; | |
1296 | } | |
7fd3560a | 1297 | |
6efd877d KR |
1298 | if (temp_size && !need_pass_2) |
1299 | { | |
1300 | p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0); | |
604633ae | 1301 | memset (p, 0, (unsigned int) temp_size); |
c8863a58 KR |
1302 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX |
1303 | * flavoured AS. The following bizzare behaviour is to be | |
1304 | * compatible with above. I guess they tried to take up to 8 | |
1305 | * bytes from a 4-byte expression and they forgot to sign | |
1306 | * extend. Un*x Sux. */ | |
fecd2382 | 1307 | #define BSD_FILL_SIZE_CROCK_4 (4) |
604633ae | 1308 | md_number_to_chars (p, (valueT) temp_fill, |
c8863a58 KR |
1309 | (temp_size > BSD_FILL_SIZE_CROCK_4 |
1310 | ? BSD_FILL_SIZE_CROCK_4 | |
1311 | : (int) temp_size)); | |
1312 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
1313 | * but emits no error message because it seems a legal thing to do. | |
1314 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
1315 | */ | |
6efd877d | 1316 | } |
6efd877d | 1317 | demand_empty_rest_of_line (); |
f8701a3f SC |
1318 | } |
1319 | ||
6efd877d | 1320 | void |
604633ae ILT |
1321 | s_globl (ignore) |
1322 | int ignore; | |
6efd877d | 1323 | { |
40324362 KR |
1324 | char *name; |
1325 | int c; | |
1326 | symbolS *symbolP; | |
fecd2382 | 1327 | |
6efd877d KR |
1328 | do |
1329 | { | |
1330 | name = input_line_pointer; | |
1331 | c = get_symbol_end (); | |
1332 | symbolP = symbol_find_or_make (name); | |
1333 | *input_line_pointer = c; | |
1334 | SKIP_WHITESPACE (); | |
1335 | S_SET_EXTERNAL (symbolP); | |
1336 | if (c == ',') | |
1337 | { | |
1338 | input_line_pointer++; | |
1339 | SKIP_WHITESPACE (); | |
1340 | if (*input_line_pointer == '\n') | |
1341 | c = '\n'; | |
1342 | } | |
1343 | } | |
1344 | while (c == ','); | |
1345 | demand_empty_rest_of_line (); | |
40324362 | 1346 | } |
6efd877d KR |
1347 | |
1348 | void | |
1349 | s_lcomm (needs_align) | |
c8863a58 KR |
1350 | /* 1 if this was a ".bss" directive, which may require a 3rd argument |
1351 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1352 | int needs_align; | |
fecd2382 | 1353 | { |
6efd877d KR |
1354 | register char *name; |
1355 | register char c; | |
1356 | register char *p; | |
1357 | register int temp; | |
1358 | register symbolS *symbolP; | |
9a7d824a ILT |
1359 | segT current_seg = now_seg; |
1360 | subsegT current_subseg = now_subseg; | |
6efd877d KR |
1361 | const int max_alignment = 15; |
1362 | int align = 0; | |
9a7d824a | 1363 | segT bss_seg = bss_section; |
6efd877d KR |
1364 | |
1365 | name = input_line_pointer; | |
1366 | c = get_symbol_end (); | |
1367 | p = input_line_pointer; | |
1368 | *p = c; | |
1369 | SKIP_WHITESPACE (); | |
46b81190 ILT |
1370 | |
1371 | /* Accept an optional comma after the name. The comma used to be | |
1372 | required, but Irix 5 cc does not generate it. */ | |
1373 | if (*input_line_pointer == ',') | |
6efd877d | 1374 | { |
46b81190 ILT |
1375 | ++input_line_pointer; |
1376 | SKIP_WHITESPACE (); | |
6efd877d | 1377 | } |
f8701a3f | 1378 | |
6efd877d KR |
1379 | if (*input_line_pointer == '\n') |
1380 | { | |
1381 | as_bad ("Missing size expression"); | |
1382 | return; | |
1383 | } | |
f8701a3f | 1384 | |
6efd877d KR |
1385 | if ((temp = get_absolute_expression ()) < 0) |
1386 | { | |
1387 | as_warn ("BSS length (%d.) <0! Ignored.", temp); | |
1388 | ignore_rest_of_line (); | |
1389 | return; | |
1390 | } | |
f8701a3f | 1391 | |
2ef7731d | 1392 | #if defined (TC_MIPS) || defined (TC_ALPHA) |
a2a5a4fa KR |
1393 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour |
1394 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
46b81190 | 1395 | { |
a2a5a4fa KR |
1396 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ |
1397 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1398 | { | |
1399 | bss_seg = subseg_new (".sbss", 1); | |
1400 | seg_info (bss_seg)->bss = 1; | |
1401 | } | |
46b81190 | 1402 | } |
9a7d824a | 1403 | #endif |
ede7bc1c SC |
1404 | if (!needs_align) |
1405 | { | |
1406 | /* FIXME. This needs to be machine independent. */ | |
9d90491e ILT |
1407 | if (temp >= 8) |
1408 | align = 3; | |
1409 | else if (temp >= 4) | |
ede7bc1c SC |
1410 | align = 2; |
1411 | else if (temp >= 2) | |
1412 | align = 1; | |
1413 | else | |
c71a604a | 1414 | align = 0; |
ede7bc1c SC |
1415 | |
1416 | record_alignment(bss_seg, align); | |
1417 | } | |
9a7d824a | 1418 | |
6efd877d KR |
1419 | if (needs_align) |
1420 | { | |
1421 | align = 0; | |
1422 | SKIP_WHITESPACE (); | |
1423 | if (*input_line_pointer != ',') | |
1424 | { | |
1425 | as_bad ("Expected comma after size"); | |
1426 | ignore_rest_of_line (); | |
1427 | return; | |
1428 | } | |
1429 | input_line_pointer++; | |
1430 | SKIP_WHITESPACE (); | |
1431 | if (*input_line_pointer == '\n') | |
1432 | { | |
1433 | as_bad ("Missing alignment"); | |
1434 | return; | |
1435 | } | |
1436 | align = get_absolute_expression (); | |
1437 | if (align > max_alignment) | |
1438 | { | |
1439 | align = max_alignment; | |
1440 | as_warn ("Alignment too large: %d. assumed.", align); | |
1441 | } | |
1442 | else if (align < 0) | |
1443 | { | |
1444 | align = 0; | |
1445 | as_warn ("Alignment negative. 0 assumed."); | |
1446 | } | |
9a7d824a | 1447 | record_alignment (bss_seg, align); |
6efd877d | 1448 | } /* if needs align */ |
4075afe1 KR |
1449 | else |
1450 | { | |
1451 | /* Assume some objects may require alignment on some systems. */ | |
1452 | #ifdef TC_ALPHA | |
1453 | if (temp > 1) | |
1454 | { | |
1455 | align = ffs (temp) - 1; | |
1456 | if (temp % (1 << align)) | |
1457 | abort (); | |
1458 | } | |
1459 | #endif | |
1460 | } | |
f8701a3f | 1461 | |
6efd877d KR |
1462 | *p = 0; |
1463 | symbolP = symbol_find_or_make (name); | |
1464 | *p = c; | |
f8701a3f | 1465 | |
6efd877d | 1466 | if ( |
fecd2382 | 1467 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
6efd877d KR |
1468 | S_GET_OTHER (symbolP) == 0 && |
1469 | S_GET_DESC (symbolP) == 0 && | |
fecd2382 | 1470 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
9a7d824a | 1471 | (S_GET_SEGMENT (symbolP) == bss_seg |
6efd877d KR |
1472 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) |
1473 | { | |
604633ae | 1474 | char *pfrag; |
85825401 | 1475 | |
9a7d824a | 1476 | subseg_set (bss_seg, 1); |
85825401 ILT |
1477 | |
1478 | if (align) | |
1479 | frag_align (align, 0); | |
1480 | /* detach from old frag */ | |
9a7d824a | 1481 | if (S_GET_SEGMENT (symbolP) == bss_seg) |
85825401 ILT |
1482 | symbolP->sy_frag->fr_symbol = NULL; |
1483 | ||
1484 | symbolP->sy_frag = frag_now; | |
604633ae ILT |
1485 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
1486 | temp, (char *)0); | |
1487 | *pfrag = 0; | |
f8701a3f | 1488 | |
9a7d824a | 1489 | S_SET_SEGMENT (symbolP, bss_seg); |
85825401 | 1490 | |
fecd2382 | 1491 | #ifdef OBJ_COFF |
6efd877d | 1492 | /* The symbol may already have been created with a preceding |
c8863a58 KR |
1493 | ".globl" directive -- be careful not to step on storage class |
1494 | in that case. Otherwise, set it to static. */ | |
6efd877d KR |
1495 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) |
1496 | { | |
1497 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
fecd2382 | 1498 | } |
6efd877d | 1499 | #endif /* OBJ_COFF */ |
6efd877d KR |
1500 | } |
1501 | else | |
6ef37255 KR |
1502 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
1503 | S_GET_NAME (symbolP)); | |
f8701a3f | 1504 | |
9a7d824a | 1505 | subseg_set (current_seg, current_subseg); |
9a7d824a ILT |
1506 | |
1507 | demand_empty_rest_of_line (); | |
6efd877d | 1508 | } /* s_lcomm() */ |
fecd2382 | 1509 | |
6efd877d | 1510 | void |
604633ae ILT |
1511 | s_lsym (ignore) |
1512 | int ignore; | |
6efd877d KR |
1513 | { |
1514 | register char *name; | |
1515 | register char c; | |
1516 | register char *p; | |
6efd877d KR |
1517 | expressionS exp; |
1518 | register symbolS *symbolP; | |
1519 | ||
1520 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
1521 | name = input_line_pointer; | |
1522 | c = get_symbol_end (); | |
1523 | p = input_line_pointer; | |
1524 | *p = c; | |
1525 | SKIP_WHITESPACE (); | |
1526 | if (*input_line_pointer != ',') | |
1527 | { | |
1528 | *p = 0; | |
1529 | as_bad ("Expected comma after name \"%s\"", name); | |
1530 | *p = c; | |
1531 | ignore_rest_of_line (); | |
1532 | return; | |
1533 | } | |
1534 | input_line_pointer++; | |
b31f2abb KR |
1535 | expression (&exp); |
1536 | if (exp.X_op != O_constant | |
1537 | && exp.X_op != O_register) | |
1538 | { | |
1539 | as_bad ("bad expression"); | |
1540 | ignore_rest_of_line (); | |
1541 | return; | |
1542 | } | |
6efd877d KR |
1543 | *p = 0; |
1544 | symbolP = symbol_find_or_make (name); | |
f8701a3f | 1545 | |
c8863a58 KR |
1546 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && |
1547 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
1548 | those fields, and I can't see when they'd ever be tripped. I | |
1549 | don't think I understand why they were here so I may have | |
1550 | introduced a bug. As recently as 1.37 didn't have this test | |
1551 | anyway. xoxorich. */ | |
f8701a3f | 1552 | |
9471a360 | 1553 | if (S_GET_SEGMENT (symbolP) == undefined_section |
6efd877d KR |
1554 | && S_GET_VALUE (symbolP) == 0) |
1555 | { | |
c8863a58 KR |
1556 | /* The name might be an undefined .global symbol; be sure to |
1557 | keep the "external" bit. */ | |
b31f2abb KR |
1558 | S_SET_SEGMENT (symbolP, |
1559 | (exp.X_op == O_constant | |
1560 | ? absolute_section | |
1561 | : reg_section)); | |
1562 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
6efd877d KR |
1563 | } |
1564 | else | |
1565 | { | |
1566 | as_bad ("Symbol %s already defined", name); | |
1567 | } | |
1568 | *p = c; | |
1569 | demand_empty_rest_of_line (); | |
1570 | } /* s_lsym() */ | |
1571 | ||
e28c40d7 ILT |
1572 | /* Handle changing the location counter. */ |
1573 | ||
1574 | static void | |
1575 | do_org (segment, exp, fill) | |
1576 | segT segment; | |
1577 | expressionS *exp; | |
1578 | int fill; | |
1579 | { | |
1580 | if (segment != now_seg && segment != absolute_section) | |
1581 | as_bad ("invalid segment \"%s\"; segment \"%s\" assumed", | |
1582 | segment_name (segment), segment_name (now_seg)); | |
1583 | ||
1584 | if (now_seg == absolute_section) | |
1585 | { | |
1586 | if (fill != 0) | |
1587 | as_warn ("ignoring fill value in absolute section"); | |
1588 | if (exp->X_op != O_constant) | |
1589 | { | |
1590 | as_bad ("only constant offsets supported in absolute section"); | |
1591 | exp->X_add_number = 0; | |
1592 | } | |
1593 | abs_section_offset = exp->X_add_number; | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | char *p; | |
1598 | ||
1599 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, | |
1600 | exp->X_add_number, (char *) NULL); | |
1601 | *p = fill; | |
1602 | } | |
1603 | } | |
1604 | ||
6efd877d | 1605 | void |
604633ae ILT |
1606 | s_org (ignore) |
1607 | int ignore; | |
6efd877d KR |
1608 | { |
1609 | register segT segment; | |
1610 | expressionS exp; | |
1611 | register long temp_fill; | |
e28c40d7 | 1612 | |
69e077f3 ILT |
1613 | /* The MRI assembler has a different meaning for .org. It means to |
1614 | create an absolute section at a given address. We can't support | |
1615 | that--use a linker script instead. */ | |
1616 | if (flag_mri) | |
1617 | { | |
1618 | as_bad ("MRI style ORG pseudo-op not supported"); | |
1619 | ignore_rest_of_line (); | |
1620 | return; | |
1621 | } | |
1622 | ||
9471a360 KR |
1623 | /* Don't believe the documentation of BSD 4.2 AS. There is no such |
1624 | thing as a sub-segment-relative origin. Any absolute origin is | |
1625 | given a warning, then assumed to be segment-relative. Any | |
1626 | segmented origin expression ("foo+42") had better be in the right | |
1627 | segment or the .org is ignored. | |
1628 | ||
1629 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
1630 | we never know sub-segment sizes when we are reading code. BSD | |
1631 | will crash trying to emit negative numbers of filler bytes in | |
1632 | certain .orgs. We don't crash, but see as-write for that code. | |
1633 | ||
1634 | Don't make frag if need_pass_2==1. */ | |
6efd877d KR |
1635 | segment = get_known_segmented_expression (&exp); |
1636 | if (*input_line_pointer == ',') | |
1637 | { | |
1638 | input_line_pointer++; | |
1639 | temp_fill = get_absolute_expression (); | |
1640 | } | |
1641 | else | |
1642 | temp_fill = 0; | |
e28c40d7 | 1643 | |
6efd877d | 1644 | if (!need_pass_2) |
e28c40d7 ILT |
1645 | do_org (segment, &exp, temp_fill); |
1646 | ||
6efd877d KR |
1647 | demand_empty_rest_of_line (); |
1648 | } /* s_org() */ | |
1649 | ||
e14994d9 ILT |
1650 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be |
1651 | called by the obj-format routine which handles section changing | |
1652 | when in MRI mode. It will create a new section, and return it. It | |
1653 | will set *TYPE to the section type: one of '\0' (unspecified), 'C' | |
1654 | (code), 'D' (data), 'M' (mixed), or 'R' (romable). If | |
1655 | BFD_ASSEMBLER is defined, the flags will be set in the section. */ | |
1656 | ||
1657 | void | |
1658 | s_mri_sect (type) | |
1659 | char *type; | |
1660 | { | |
1661 | char *name; | |
1662 | char c; | |
1663 | segT seg; | |
1664 | ||
1665 | SKIP_WHITESPACE (); | |
1666 | ||
1667 | name = input_line_pointer; | |
1668 | if (! isdigit ((unsigned char) *name)) | |
1669 | c = get_symbol_end (); | |
1670 | else | |
1671 | { | |
1672 | do | |
1673 | { | |
1674 | ++input_line_pointer; | |
1675 | } | |
1676 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1677 | c = *input_line_pointer; | |
1678 | *input_line_pointer = '\0'; | |
1679 | } | |
1680 | ||
1681 | name = strdup (name); | |
1682 | if (name == NULL) | |
1683 | as_fatal ("virtual memory exhausted"); | |
1684 | ||
1685 | *input_line_pointer = c; | |
1686 | ||
1687 | seg = subseg_new (name, 0); | |
1688 | ||
1689 | if (*input_line_pointer == ',') | |
1690 | { | |
1691 | int align; | |
1692 | ||
1693 | ++input_line_pointer; | |
1694 | align = get_absolute_expression (); | |
1695 | record_alignment (seg, align); | |
1696 | } | |
1697 | ||
1698 | *type = '\0'; | |
1699 | if (*input_line_pointer == ',') | |
1700 | { | |
1701 | c = *++input_line_pointer; | |
1702 | c = toupper ((unsigned char) c); | |
1703 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') | |
1704 | *type = c; | |
1705 | else | |
1706 | as_bad ("unrecognized section type"); | |
1707 | ++input_line_pointer; | |
1708 | ||
1709 | #ifdef BFD_ASSEMBLER | |
1710 | { | |
1711 | flagword flags; | |
1712 | ||
1713 | flags = SEC_NO_FLAGS; | |
1714 | if (type == 'C') | |
1715 | flags = SEC_CODE; | |
1716 | else if (type == 'D') | |
1717 | flags = SEC_DATA; | |
1718 | else if (type == 'R') | |
1719 | flags = SEC_ROM; | |
1720 | if (flags != SEC_NO_FLAGS) | |
1721 | { | |
1722 | if (! bfd_set_section_flags (stdoutput, seg, flags)) | |
1723 | as_warn ("error setting flags for \"%s\": %s", | |
1724 | bfd_section_name (stdoutput, sec), | |
1725 | bfd_errmsg (bfd_get_error ())); | |
1726 | } | |
1727 | } | |
1728 | #endif | |
1729 | } | |
1730 | ||
1731 | /* Ignore the HP type. */ | |
1732 | if (*input_line_pointer == ',') | |
1733 | input_line_pointer += 2; | |
1734 | ||
1735 | demand_empty_rest_of_line (); | |
1736 | } | |
1737 | ||
6efd877d | 1738 | void |
604633ae ILT |
1739 | s_set (ignore) |
1740 | int ignore; | |
6efd877d KR |
1741 | { |
1742 | register char *name; | |
1743 | register char delim; | |
1744 | register char *end_name; | |
1745 | register symbolS *symbolP; | |
1746 | ||
1747 | /* | |
c8863a58 KR |
1748 | * Especial apologies for the random logic: |
1749 | * this just grew, and could be parsed much more simply! | |
1750 | * Dean in haste. | |
1751 | */ | |
6efd877d KR |
1752 | name = input_line_pointer; |
1753 | delim = get_symbol_end (); | |
1754 | end_name = input_line_pointer; | |
1755 | *end_name = delim; | |
1756 | SKIP_WHITESPACE (); | |
f8701a3f | 1757 | |
6efd877d KR |
1758 | if (*input_line_pointer != ',') |
1759 | { | |
1760 | *end_name = 0; | |
1761 | as_bad ("Expected comma after name \"%s\"", name); | |
1762 | *end_name = delim; | |
1763 | ignore_rest_of_line (); | |
1764 | return; | |
1765 | } | |
1766 | ||
1767 | input_line_pointer++; | |
1768 | *end_name = 0; | |
1769 | ||
1770 | if (name[0] == '.' && name[1] == '\0') | |
1771 | { | |
1772 | /* Turn '. = mumble' into a .org mumble */ | |
1773 | register segT segment; | |
1774 | expressionS exp; | |
6efd877d KR |
1775 | |
1776 | segment = get_known_segmented_expression (&exp); | |
f8701a3f | 1777 | |
6efd877d | 1778 | if (!need_pass_2) |
e28c40d7 | 1779 | do_org (segment, &exp, 0); |
6efd877d KR |
1780 | |
1781 | *end_name = delim; | |
1782 | return; | |
1783 | } | |
1784 | ||
1785 | if ((symbolP = symbol_find (name)) == NULL | |
1786 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
1787 | { | |
9471a360 | 1788 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); |
fecd2382 | 1789 | #ifdef OBJ_COFF |
6efd877d KR |
1790 | /* "set" symbols are local unless otherwise specified. */ |
1791 | SF_SET_LOCAL (symbolP); | |
fecd2382 | 1792 | #endif /* OBJ_COFF */ |
f8701a3f | 1793 | |
6efd877d | 1794 | } /* make a new symbol */ |
f8701a3f | 1795 | |
6efd877d | 1796 | symbol_table_insert (symbolP); |
f8701a3f | 1797 | |
6efd877d KR |
1798 | *end_name = delim; |
1799 | pseudo_set (symbolP); | |
1800 | demand_empty_rest_of_line (); | |
1801 | } /* s_set() */ | |
fecd2382 | 1802 | |
6efd877d KR |
1803 | void |
1804 | s_space (mult) | |
1805 | int mult; | |
b53ccaac | 1806 | { |
cd3b81bd | 1807 | expressionS exp; |
931a8fab | 1808 | long temp_fill; |
cd3b81bd | 1809 | char *p = 0; |
6efd877d | 1810 | |
a2a5a4fa KR |
1811 | #ifdef md_flush_pending_output |
1812 | md_flush_pending_output (); | |
1813 | #endif | |
1814 | ||
6efd877d | 1815 | /* Just like .fill, but temp_size = 1 */ |
cd3b81bd | 1816 | expression (&exp); |
931a8fab | 1817 | if (exp.X_op == O_constant) |
6efd877d | 1818 | { |
cd3b81bd KR |
1819 | long repeat; |
1820 | ||
1821 | repeat = exp.X_add_number; | |
1822 | if (mult) | |
1823 | repeat *= mult; | |
1824 | if (repeat <= 0) | |
1825 | { | |
1826 | as_warn (".space repeat count is %s, ignored", | |
1827 | repeat ? "negative" : "zero"); | |
1828 | ignore_rest_of_line (); | |
1829 | return; | |
1830 | } | |
1831 | ||
e28c40d7 ILT |
1832 | /* If we are in the absolute section, just bump the offset. */ |
1833 | if (now_seg == absolute_section) | |
1834 | { | |
1835 | abs_section_offset += repeat; | |
1836 | demand_empty_rest_of_line (); | |
1837 | return; | |
1838 | } | |
1839 | ||
1356d77d ILT |
1840 | /* If we are secretly in an MRI common section, then creating |
1841 | space just increases the size of the common symbol. */ | |
1842 | if (mri_common_symbol != NULL) | |
1843 | { | |
1844 | S_SET_VALUE (mri_common_symbol, | |
1845 | S_GET_VALUE (mri_common_symbol) + repeat); | |
1846 | demand_empty_rest_of_line (); | |
1847 | return; | |
1848 | } | |
1849 | ||
cd3b81bd KR |
1850 | if (!need_pass_2) |
1851 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
931a8fab | 1852 | repeat, (char *) 0); |
6efd877d KR |
1853 | } |
1854 | else | |
1855 | { | |
e28c40d7 ILT |
1856 | if (now_seg == absolute_section) |
1857 | { | |
1858 | as_bad ("space allocation too complex in absolute section"); | |
1859 | subseg_set (text_section, 0); | |
1860 | } | |
1356d77d ILT |
1861 | if (mri_common_symbol != NULL) |
1862 | { | |
1863 | as_bad ("space allocation too complex in common section"); | |
1864 | mri_common_symbol = NULL; | |
1865 | } | |
cd3b81bd KR |
1866 | if (!need_pass_2) |
1867 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, | |
1868 | make_expr_symbol (&exp), 0L, (char *) 0); | |
6efd877d | 1869 | } |
931a8fab KR |
1870 | SKIP_WHITESPACE (); |
1871 | if (*input_line_pointer == ',') | |
6efd877d | 1872 | { |
931a8fab | 1873 | input_line_pointer++; |
cd3b81bd | 1874 | temp_fill = get_absolute_expression (); |
6efd877d | 1875 | } |
cd3b81bd | 1876 | else |
6efd877d | 1877 | { |
cd3b81bd | 1878 | temp_fill = 0; |
6efd877d | 1879 | } |
cd3b81bd | 1880 | if (p) |
6efd877d | 1881 | { |
6efd877d KR |
1882 | *p = temp_fill; |
1883 | } | |
1884 | demand_empty_rest_of_line (); | |
cd3b81bd | 1885 | } |
fecd2382 | 1886 | |
e28c40d7 ILT |
1887 | /* This is like s_space, but the value is a floating point number with |
1888 | the given precision. This is for the MRI dcb.s pseudo-op and | |
1889 | friends. */ | |
1890 | ||
1891 | void | |
1892 | s_float_space (float_type) | |
1893 | int float_type; | |
1894 | { | |
1895 | offsetT count; | |
1896 | int flen; | |
1897 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
1898 | ||
1899 | count = get_absolute_expression (); | |
1900 | ||
1901 | SKIP_WHITESPACE (); | |
1902 | if (*input_line_pointer != ',') | |
1903 | { | |
1904 | as_bad ("missing value"); | |
1905 | ignore_rest_of_line (); | |
1906 | return; | |
1907 | } | |
1908 | ||
1909 | ++input_line_pointer; | |
1910 | ||
1911 | SKIP_WHITESPACE (); | |
1912 | ||
1913 | /* Skip any 0{letter} that may be present. Don't even check if the | |
1914 | * letter is legal. */ | |
1915 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) | |
1916 | input_line_pointer += 2; | |
1917 | ||
1918 | /* Accept :xxxx, where the x's are hex digits, for a floating point | |
1919 | with the exact digits specified. */ | |
1920 | if (input_line_pointer[0] == ':') | |
1921 | { | |
1922 | flen = hex_float (float_type, temp); | |
1923 | if (flen < 0) | |
1924 | { | |
1925 | ignore_rest_of_line (); | |
1926 | return; | |
1927 | } | |
1928 | } | |
1929 | else | |
1930 | { | |
1931 | char *err; | |
1932 | ||
1933 | err = md_atof (float_type, temp, &flen); | |
1934 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
1935 | know (flen > 0); | |
1936 | if (err) | |
1937 | { | |
1938 | as_bad ("Bad floating literal: %s", err); | |
1939 | ignore_rest_of_line (); | |
1940 | return; | |
1941 | } | |
1942 | } | |
1943 | ||
1944 | while (--count >= 0) | |
1945 | { | |
1946 | char *p; | |
1947 | ||
1948 | p = frag_more (flen); | |
1949 | memcpy (p, temp, (unsigned int) flen); | |
1950 | } | |
1951 | ||
1952 | demand_empty_rest_of_line (); | |
1953 | } | |
1954 | ||
1955 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ | |
1956 | ||
1957 | void | |
1958 | s_struct (ignore) | |
1959 | int ignore; | |
1960 | { | |
1961 | abs_section_offset = get_absolute_expression (); | |
1962 | subseg_set (absolute_section, 0); | |
1963 | demand_empty_rest_of_line (); | |
1964 | } | |
1965 | ||
fecd2382 | 1966 | void |
604633ae ILT |
1967 | s_text (ignore) |
1968 | int ignore; | |
fecd2382 | 1969 | { |
6efd877d | 1970 | register int temp; |
f8701a3f | 1971 | |
6efd877d | 1972 | temp = get_absolute_expression (); |
9471a360 | 1973 | subseg_set (text_section, (subsegT) temp); |
6efd877d | 1974 | demand_empty_rest_of_line (); |
80d80c64 KR |
1975 | #ifdef OBJ_VMS |
1976 | const_flag &= ~IN_DEFAULT_SECTION; | |
1977 | #endif | |
6efd877d | 1978 | } /* s_text() */ |
fecd2382 | 1979 | \f |
6efd877d | 1980 | |
6efd877d KR |
1981 | void |
1982 | demand_empty_rest_of_line () | |
1983 | { | |
1984 | SKIP_WHITESPACE (); | |
58d4951d | 1985 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
1986 | { |
1987 | input_line_pointer++; | |
1988 | } | |
1989 | else | |
1990 | { | |
1991 | ignore_rest_of_line (); | |
1992 | } | |
1993 | /* Return having already swallowed end-of-line. */ | |
1994 | } /* Return pointing just after end-of-line. */ | |
fecd2382 RP |
1995 | |
1996 | void | |
6efd877d | 1997 | ignore_rest_of_line () /* For suspect lines: gives warning. */ |
fecd2382 | 1998 | { |
58d4951d | 1999 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 2000 | { |
6efd877d KR |
2001 | if (isprint (*input_line_pointer)) |
2002 | as_bad ("Rest of line ignored. First ignored character is `%c'.", | |
f8701a3f SC |
2003 | *input_line_pointer); |
2004 | else | |
6efd877d | 2005 | as_bad ("Rest of line ignored. First ignored character valued 0x%x.", |
f8701a3f SC |
2006 | *input_line_pointer); |
2007 | while (input_line_pointer < buffer_limit | |
58d4951d | 2008 | && !is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 2009 | { |
6efd877d | 2010 | input_line_pointer++; |
f8701a3f SC |
2011 | } |
2012 | } | |
6efd877d | 2013 | input_line_pointer++; /* Return pointing just after end-of-line. */ |
58d4951d | 2014 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); |
fecd2382 RP |
2015 | } |
2016 | ||
2017 | /* | |
2018 | * pseudo_set() | |
2019 | * | |
2020 | * In: Pointer to a symbol. | |
2021 | * Input_line_pointer->expression. | |
2022 | * | |
2023 | * Out: Input_line_pointer->just after any whitespace after expression. | |
2024 | * Tried to set symbol to value of expression. | |
2025 | * Will change symbols type, value, and frag; | |
fecd2382 RP |
2026 | */ |
2027 | void | |
f8701a3f | 2028 | pseudo_set (symbolP) |
6efd877d | 2029 | symbolS *symbolP; |
fecd2382 | 2030 | { |
6efd877d | 2031 | expressionS exp; |
daad3bbf | 2032 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
f8701a3f | 2033 | int ext; |
fecd2382 | 2034 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 2035 | |
6efd877d | 2036 | know (symbolP); /* NULL pointer is logic error. */ |
daad3bbf | 2037 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
6efd877d | 2038 | ext = S_IS_EXTERNAL (symbolP); |
fecd2382 | 2039 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 2040 | |
5ac34ac3 | 2041 | (void) expression (&exp); |
f8701a3f | 2042 | |
5ac34ac3 ILT |
2043 | if (exp.X_op == O_illegal) |
2044 | as_bad ("illegal expression; zero assumed"); | |
2045 | else if (exp.X_op == O_absent) | |
2046 | as_bad ("missing expression; zero assumed"); | |
2047 | else if (exp.X_op == O_big) | |
2048 | as_bad ("%s number invalid; zero assumed", | |
2049 | exp.X_add_number > 0 ? "bignum" : "floating point"); | |
2050 | else if (exp.X_op == O_subtract | |
2051 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
2052 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
2053 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
2054 | && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) | |
9471a360 | 2055 | { |
5ac34ac3 ILT |
2056 | exp.X_op = O_constant; |
2057 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
2058 | - S_GET_VALUE (exp.X_op_symbol)); | |
9471a360 | 2059 | } |
5ac34ac3 ILT |
2060 | |
2061 | switch (exp.X_op) | |
9471a360 | 2062 | { |
5ac34ac3 ILT |
2063 | case O_illegal: |
2064 | case O_absent: | |
2065 | case O_big: | |
2066 | exp.X_add_number = 0; | |
2067 | /* Fall through. */ | |
2068 | case O_constant: | |
9471a360 | 2069 | S_SET_SEGMENT (symbolP, absolute_section); |
daad3bbf | 2070 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
5ac34ac3 ILT |
2071 | if (ext) |
2072 | S_SET_EXTERNAL (symbolP); | |
6efd877d | 2073 | else |
6efd877d | 2074 | S_CLEAR_EXTERNAL (symbolP); |
fecd2382 | 2075 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
604633ae | 2076 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
6efd877d | 2077 | symbolP->sy_frag = &zero_address_frag; |
5ac34ac3 | 2078 | break; |
f8701a3f | 2079 | |
5ac34ac3 ILT |
2080 | case O_register: |
2081 | S_SET_SEGMENT (symbolP, reg_section); | |
604633ae | 2082 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
5ac34ac3 ILT |
2083 | symbolP->sy_frag = &zero_address_frag; |
2084 | break; | |
2085 | ||
2086 | case O_symbol: | |
ef198870 KR |
2087 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section |
2088 | || exp.X_add_number != 0) | |
5ac34ac3 | 2089 | symbolP->sy_value = exp; |
6efd877d KR |
2090 | else |
2091 | { | |
80d80c64 KR |
2092 | symbolS *s = exp.X_add_symbol; |
2093 | ||
2094 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); | |
daad3bbf | 2095 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
5ac34ac3 ILT |
2096 | if (ext) |
2097 | S_SET_EXTERNAL (symbolP); | |
2098 | else | |
2099 | S_CLEAR_EXTERNAL (symbolP); | |
fecd2382 | 2100 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
5ac34ac3 | 2101 | S_SET_VALUE (symbolP, |
80d80c64 KR |
2102 | exp.X_add_number + S_GET_VALUE (s)); |
2103 | symbolP->sy_frag = s->sy_frag; | |
ef198870 | 2104 | copy_symbol_attributes (symbolP, s); |
5ac34ac3 ILT |
2105 | } |
2106 | break; | |
f8701a3f | 2107 | |
5ac34ac3 ILT |
2108 | default: |
2109 | /* The value is some complex expression. | |
2110 | FIXME: Should we set the segment to anything? */ | |
2111 | symbolP->sy_value = exp; | |
2112 | break; | |
f8701a3f | 2113 | } |
fecd2382 RP |
2114 | } |
2115 | \f | |
2116 | /* | |
2117 | * cons() | |
2118 | * | |
2119 | * CONStruct more frag of .bytes, or .words etc. | |
2120 | * Should need_pass_2 be 1 then emit no frag(s). | |
80aab579 | 2121 | * This understands EXPRESSIONS. |
fecd2382 RP |
2122 | * |
2123 | * Bug (?) | |
2124 | * | |
2125 | * This has a split personality. We use expression() to read the | |
2126 | * value. We can detect if the value won't fit in a byte or word. | |
2127 | * But we can't detect if expression() discarded significant digits | |
2128 | * in the case of a long. Not worth the crocks required to fix it. | |
2129 | */ | |
2130 | ||
40324362 KR |
2131 | /* Select a parser for cons expressions. */ |
2132 | ||
2133 | /* Some targets need to parse the expression in various fancy ways. | |
2134 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
2135 | (for example, the HPPA does this). Otherwise, you can define | |
2136 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
2137 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
2138 | are defined, which is the normal case, then only simple expressions | |
2139 | are permitted. */ | |
2140 | ||
1356d77d ILT |
2141 | static void |
2142 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2143 | ||
40324362 KR |
2144 | #ifndef TC_PARSE_CONS_EXPRESSION |
2145 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
2146 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
2147 | static void | |
2148 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2149 | #endif | |
40324362 KR |
2150 | #ifdef REPEAT_CONS_EXPRESSIONS |
2151 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
2152 | static void | |
2153 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2154 | #endif | |
2155 | ||
2156 | /* If we haven't gotten one yet, just call expression. */ | |
2157 | #ifndef TC_PARSE_CONS_EXPRESSION | |
2158 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
2159 | #endif | |
2160 | #endif | |
2161 | ||
6efd877d KR |
2162 | /* worker to do .byte etc statements */ |
2163 | /* clobbers input_line_pointer, checks */ | |
2164 | /* end-of-line. */ | |
2165 | void | |
2166 | cons (nbytes) | |
604633ae | 2167 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
fecd2382 | 2168 | { |
286cb27a | 2169 | int c; |
6efd877d | 2170 | expressionS exp; |
f8701a3f | 2171 | |
a2a5a4fa KR |
2172 | #ifdef md_flush_pending_output |
2173 | md_flush_pending_output (); | |
2174 | #endif | |
2175 | ||
40324362 | 2176 | if (is_it_end_of_statement ()) |
6efd877d | 2177 | { |
40324362 KR |
2178 | demand_empty_rest_of_line (); |
2179 | return; | |
6efd877d | 2180 | } |
40324362 | 2181 | |
286cb27a | 2182 | c = 0; |
40324362 | 2183 | do |
6efd877d | 2184 | { |
1356d77d ILT |
2185 | if (flag_mri) |
2186 | parse_mri_cons (&exp, (unsigned int) nbytes); | |
2187 | else | |
2188 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); | |
604633ae | 2189 | emit_expr (&exp, (unsigned int) nbytes); |
286cb27a | 2190 | ++c; |
40324362 KR |
2191 | } |
2192 | while (*input_line_pointer++ == ','); | |
2193 | ||
286cb27a ILT |
2194 | /* In MRI mode, after an odd number of bytes, we must align to an |
2195 | even word boundary, unless the next instruction is a dc.b, ds.b | |
2196 | or dcb.b. */ | |
2197 | if (flag_mri && nbytes == 1 && (c & 1) != 0) | |
2198 | mri_pending_align = 1; | |
2199 | ||
40324362 KR |
2200 | input_line_pointer--; /* Put terminator back into stream. */ |
2201 | demand_empty_rest_of_line (); | |
30d3a445 | 2202 | } |
f8701a3f | 2203 | |
40324362 KR |
2204 | /* Put the contents of expression EXP into the object file using |
2205 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
f8701a3f | 2206 | |
40324362 KR |
2207 | void |
2208 | emit_expr (exp, nbytes) | |
2209 | expressionS *exp; | |
2210 | unsigned int nbytes; | |
2211 | { | |
5ac34ac3 | 2212 | operatorT op; |
40324362 | 2213 | register char *p; |
80aab579 | 2214 | valueT extra_digit = 0; |
f8701a3f | 2215 | |
40324362 KR |
2216 | /* Don't do anything if we are going to make another pass. */ |
2217 | if (need_pass_2) | |
2218 | return; | |
2219 | ||
5ac34ac3 | 2220 | op = exp->X_op; |
40324362 | 2221 | |
e28c40d7 ILT |
2222 | /* Allow `.word 0' in the absolute section. */ |
2223 | if (now_seg == absolute_section) | |
2224 | { | |
2225 | if (op != O_constant || exp->X_add_number != 0) | |
2226 | as_bad ("attempt to store value in absolute section"); | |
2227 | abs_section_offset += nbytes; | |
2228 | return; | |
2229 | } | |
2230 | ||
80aab579 ILT |
2231 | /* Handle a negative bignum. */ |
2232 | if (op == O_uminus | |
2233 | && exp->X_add_number == 0 | |
2234 | && exp->X_add_symbol->sy_value.X_op == O_big | |
2235 | && exp->X_add_symbol->sy_value.X_add_number > 0) | |
2236 | { | |
2237 | int i; | |
2238 | unsigned long carry; | |
2239 | ||
2240 | exp = &exp->X_add_symbol->sy_value; | |
2241 | ||
2242 | /* Negate the bignum: one's complement each digit and add 1. */ | |
2243 | carry = 1; | |
2244 | for (i = 0; i < exp->X_add_number; i++) | |
2245 | { | |
2246 | unsigned long next; | |
2247 | ||
2248 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
2249 | & LITTLENUM_MASK) | |
2250 | + carry); | |
2251 | generic_bignum[i] = next & LITTLENUM_MASK; | |
2252 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
2253 | } | |
2254 | ||
2255 | /* We can ignore any carry out, because it will be handled by | |
2256 | extra_digit if it is needed. */ | |
2257 | ||
2258 | extra_digit = (valueT) -1; | |
2259 | op = O_big; | |
2260 | } | |
2261 | ||
5ac34ac3 | 2262 | if (op == O_absent || op == O_illegal) |
6efd877d | 2263 | { |
5ac34ac3 ILT |
2264 | as_warn ("zero assumed for missing expression"); |
2265 | exp->X_add_number = 0; | |
2266 | op = O_constant; | |
6efd877d | 2267 | } |
80aab579 | 2268 | else if (op == O_big && exp->X_add_number <= 0) |
6efd877d | 2269 | { |
80aab579 | 2270 | as_bad ("floating point number invalid; zero assumed"); |
40324362 | 2271 | exp->X_add_number = 0; |
5ac34ac3 | 2272 | op = O_constant; |
40324362 | 2273 | } |
5ac34ac3 | 2274 | else if (op == O_register) |
6efd877d | 2275 | { |
5ac34ac3 ILT |
2276 | as_warn ("register value used as expression"); |
2277 | op = O_constant; | |
40324362 | 2278 | } |
6efd877d | 2279 | |
604633ae | 2280 | p = frag_more ((int) nbytes); |
6efd877d | 2281 | |
40324362 KR |
2282 | #ifndef WORKING_DOT_WORD |
2283 | /* If we have the difference of two symbols in a word, save it on | |
2284 | the broken_words list. See the code in write.c. */ | |
5ac34ac3 | 2285 | if (op == O_subtract && nbytes == 2) |
40324362 KR |
2286 | { |
2287 | struct broken_word *x; | |
2288 | ||
2289 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
2290 | x->next_broken_word = broken_words; | |
2291 | broken_words = x; | |
2292 | x->frag = frag_now; | |
2293 | x->word_goes_here = p; | |
2294 | x->dispfrag = 0; | |
2295 | x->add = exp->X_add_symbol; | |
5ac34ac3 | 2296 | x->sub = exp->X_op_symbol; |
40324362 KR |
2297 | x->addnum = exp->X_add_number; |
2298 | x->added = 0; | |
2299 | new_broken_words++; | |
2300 | return; | |
2301 | } | |
f8701a3f | 2302 | #endif |
6efd877d | 2303 | |
80aab579 ILT |
2304 | /* If we have an integer, but the number of bytes is too large to |
2305 | pass to md_number_to_chars, handle it as a bignum. */ | |
2306 | if (op == O_constant && nbytes > sizeof (valueT)) | |
2307 | { | |
2308 | valueT val; | |
2309 | int gencnt; | |
2310 | ||
2311 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
2312 | extra_digit = (valueT) -1; | |
2313 | val = (valueT) exp->X_add_number; | |
2314 | gencnt = 0; | |
2315 | do | |
2316 | { | |
2317 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
2318 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
2319 | ++gencnt; | |
2320 | } | |
2321 | while (val != 0); | |
2322 | op = exp->X_op = O_big; | |
2323 | exp->X_add_number = gencnt; | |
2324 | } | |
2325 | ||
5ac34ac3 | 2326 | if (op == O_constant) |
40324362 | 2327 | { |
44ce2f32 DE |
2328 | register valueT get; |
2329 | register valueT use; | |
2330 | register valueT mask; | |
2331 | register valueT unmask; | |
40324362 KR |
2332 | |
2333 | /* JF << of >= number of bits in the object is undefined. In | |
2334 | particular SPARC (Sun 4) has problems */ | |
44ce2f32 | 2335 | if (nbytes >= sizeof (valueT)) |
40324362 KR |
2336 | mask = 0; |
2337 | else | |
d2550c72 | 2338 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */ |
6efd877d | 2339 | |
40324362 | 2340 | unmask = ~mask; /* Do store these bits. */ |
6efd877d | 2341 | |
40324362 KR |
2342 | #ifdef NEVER |
2343 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
2344 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
2345 | #endif | |
6efd877d | 2346 | |
40324362 KR |
2347 | get = exp->X_add_number; |
2348 | use = get & unmask; | |
2349 | if ((get & mask) != 0 && (get & mask) != mask) | |
2350 | { /* Leading bits contain both 0s & 1s. */ | |
58d4951d | 2351 | as_warn ("Value 0x%lx truncated to 0x%lx.", get, use); |
40324362 | 2352 | } |
604633ae | 2353 | /* put bytes in right order. */ |
44ce2f32 | 2354 | md_number_to_chars (p, use, (int) nbytes); |
40324362 | 2355 | } |
80aab579 ILT |
2356 | else if (op == O_big) |
2357 | { | |
2358 | int size; | |
2359 | LITTLENUM_TYPE *nums; | |
2360 | ||
2361 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
2362 | ||
2363 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
2364 | if (nbytes < size) | |
2365 | { | |
2366 | as_warn ("Bignum truncated to %d bytes", nbytes); | |
2367 | size = nbytes; | |
2368 | } | |
2369 | ||
2370 | if (target_big_endian) | |
2371 | { | |
2372 | while (nbytes > size) | |
2373 | { | |
2374 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
2375 | nbytes -= CHARS_PER_LITTLENUM; | |
2376 | p += CHARS_PER_LITTLENUM; | |
2377 | } | |
2378 | ||
2379 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
2380 | while (size > 0) | |
2381 | { | |
2382 | --nums; | |
2383 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
2384 | size -= CHARS_PER_LITTLENUM; | |
2385 | p += CHARS_PER_LITTLENUM; | |
2386 | } | |
2387 | } | |
2388 | else | |
2389 | { | |
2390 | nums = generic_bignum; | |
2391 | while (size > 0) | |
2392 | { | |
2393 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
2394 | ++nums; | |
2395 | size -= CHARS_PER_LITTLENUM; | |
2396 | p += CHARS_PER_LITTLENUM; | |
2397 | nbytes -= CHARS_PER_LITTLENUM; | |
2398 | } | |
2399 | ||
2400 | while (nbytes > 0) | |
2401 | { | |
2402 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
2403 | nbytes -= CHARS_PER_LITTLENUM; | |
2404 | p += CHARS_PER_LITTLENUM; | |
2405 | } | |
2406 | } | |
2407 | } | |
40324362 KR |
2408 | else |
2409 | { | |
1fbfe108 | 2410 | memset (p, 0, nbytes); |
6efd877d | 2411 | |
40324362 KR |
2412 | /* Now we need to generate a fixS to record the symbol value. |
2413 | This is easy for BFD. For other targets it can be more | |
2414 | complex. For very complex cases (currently, the HPPA and | |
2415 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
2416 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
2417 | the name of the reloc code that should be stored in the fixS. | |
2418 | If neither is defined, the code uses NO_RELOC if it is | |
2419 | defined, and otherwise uses 0. */ | |
6efd877d | 2420 | |
40324362 | 2421 | #ifdef BFD_ASSEMBLER |
4064305e SS |
2422 | #ifdef TC_CONS_FIX_NEW |
2423 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
2424 | #else | |
604633ae | 2425 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 2426 | /* @@ Should look at CPU word size. */ |
ba71c54d KR |
2427 | nbytes == 2 ? BFD_RELOC_16 |
2428 | : nbytes == 8 ? BFD_RELOC_64 | |
2429 | : BFD_RELOC_32); | |
4064305e | 2430 | #endif |
40324362 KR |
2431 | #else |
2432 | #ifdef TC_CONS_FIX_NEW | |
2433 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
2434 | #else | |
2435 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
2436 | it is defined, otherwise use NO_RELOC if it is defined, | |
2437 | otherwise use 0. */ | |
2438 | #ifndef TC_CONS_RELOC | |
2439 | #ifdef NO_RELOC | |
2440 | #define TC_CONS_RELOC NO_RELOC | |
2441 | #else | |
2442 | #define TC_CONS_RELOC 0 | |
2443 | #endif | |
2444 | #endif | |
80aab579 | 2445 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 2446 | TC_CONS_RELOC); |
40324362 KR |
2447 | #endif /* TC_CONS_FIX_NEW */ |
2448 | #endif /* BFD_ASSEMBLER */ | |
2449 | } | |
2450 | } | |
2451 | \f | |
2452 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
6efd877d | 2453 | |
40324362 KR |
2454 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as |
2455 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
2456 | then pack them all together. We do a little better in that we allow | |
2457 | them in words, longs, etc. and we'll pack them in target byte order | |
2458 | for you. | |
6efd877d | 2459 | |
40324362 KR |
2460 | The rules are: pack least significat bit first, if a field doesn't |
2461 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
2462 | explicitly *not* even a warning. The bitwidth should be considered | |
2463 | a "mask". | |
6efd877d | 2464 | |
40324362 KR |
2465 | To use this function the tc-XXX.h file should define |
2466 | BITFIELD_CONS_EXPRESSIONS. */ | |
f8701a3f | 2467 | |
40324362 KR |
2468 | static void |
2469 | parse_bitfield_cons (exp, nbytes) | |
2470 | expressionS *exp; | |
2471 | unsigned int nbytes; | |
2472 | { | |
2473 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
2474 | char *hold = input_line_pointer; | |
f8701a3f | 2475 | |
5ac34ac3 | 2476 | (void) expression (exp); |
f8701a3f | 2477 | |
40324362 KR |
2478 | if (*input_line_pointer == ':') |
2479 | { /* bitfields */ | |
2480 | long value = 0; | |
f8701a3f | 2481 | |
40324362 KR |
2482 | for (;;) |
2483 | { | |
2484 | unsigned long width; | |
f8701a3f | 2485 | |
40324362 KR |
2486 | if (*input_line_pointer != ':') |
2487 | { | |
2488 | input_line_pointer = hold; | |
2489 | break; | |
2490 | } /* next piece is not a bitfield */ | |
2491 | ||
2492 | /* In the general case, we can't allow | |
2493 | full expressions with symbol | |
2494 | differences and such. The relocation | |
2495 | entries for symbols not defined in this | |
2496 | assembly would require arbitrary field | |
2497 | widths, positions, and masks which most | |
2498 | of our current object formats don't | |
2499 | support. | |
cd3b81bd | 2500 | |
40324362 KR |
2501 | In the specific case where a symbol |
2502 | *is* defined in this assembly, we | |
2503 | *could* build fixups and track it, but | |
2504 | this could lead to confusion for the | |
2505 | backends. I'm lazy. I'll take any | |
2506 | SEG_ABSOLUTE. I think that means that | |
2507 | you can use a previous .set or | |
2508 | .equ type symbol. xoxorich. */ | |
2509 | ||
5ac34ac3 | 2510 | if (exp->X_op == O_absent) |
6efd877d | 2511 | { |
5ac34ac3 | 2512 | as_warn ("using a bit field width of zero"); |
40324362 | 2513 | exp->X_add_number = 0; |
5ac34ac3 | 2514 | exp->X_op = O_constant; |
40324362 KR |
2515 | } /* implied zero width bitfield */ |
2516 | ||
5ac34ac3 | 2517 | if (exp->X_op != O_constant) |
6efd877d | 2518 | { |
40324362 | 2519 | *input_line_pointer = '\0'; |
5ac34ac3 | 2520 | as_bad ("field width \"%s\" too complex for a bitfield", hold); |
40324362 KR |
2521 | *input_line_pointer = ':'; |
2522 | demand_empty_rest_of_line (); | |
2523 | return; | |
2524 | } /* too complex */ | |
2525 | ||
2526 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
9471a360 | 2527 | { |
80aab579 | 2528 | as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits", |
40324362 KR |
2529 | width, nbytes, (BITS_PER_CHAR * nbytes)); |
2530 | width = BITS_PER_CHAR * nbytes; | |
2531 | } /* too big */ | |
2532 | ||
2533 | if (width > bits_available) | |
9471a360 | 2534 | { |
40324362 KR |
2535 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ |
2536 | input_line_pointer = hold; | |
2537 | exp->X_add_number = value; | |
2538 | break; | |
2539 | } /* won't fit */ | |
2540 | ||
2541 | hold = ++input_line_pointer; /* skip ':' */ | |
2542 | ||
5ac34ac3 ILT |
2543 | (void) expression (exp); |
2544 | if (exp->X_op != O_constant) | |
9471a360 | 2545 | { |
40324362 KR |
2546 | char cache = *input_line_pointer; |
2547 | ||
2548 | *input_line_pointer = '\0'; | |
5ac34ac3 | 2549 | as_bad ("field value \"%s\" too complex for a bitfield", hold); |
40324362 KR |
2550 | *input_line_pointer = cache; |
2551 | demand_empty_rest_of_line (); | |
2552 | return; | |
2553 | } /* too complex */ | |
2554 | ||
5ac34ac3 ILT |
2555 | value |= ((~(-1 << width) & exp->X_add_number) |
2556 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
40324362 KR |
2557 | |
2558 | if ((bits_available -= width) == 0 | |
2559 | || is_it_end_of_statement () | |
2560 | || *input_line_pointer != ',') | |
2561 | { | |
2562 | break; | |
2563 | } /* all the bitfields we're gonna get */ | |
2564 | ||
2565 | hold = ++input_line_pointer; | |
5ac34ac3 | 2566 | (void) expression (exp); |
40324362 KR |
2567 | } /* forever loop */ |
2568 | ||
2569 | exp->X_add_number = value; | |
5ac34ac3 | 2570 | exp->X_op = O_constant; |
80aab579 | 2571 | exp->X_unsigned = 1; |
40324362 KR |
2572 | } /* if looks like a bitfield */ |
2573 | } /* parse_bitfield_cons() */ | |
2574 | ||
2575 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
2576 | \f | |
1356d77d | 2577 | /* Handle an MRI style string expression. */ |
40324362 KR |
2578 | |
2579 | static void | |
2580 | parse_mri_cons (exp, nbytes) | |
2581 | expressionS *exp; | |
2582 | unsigned int nbytes; | |
2583 | { | |
1356d77d ILT |
2584 | if (*input_line_pointer != '\'' |
2585 | && (input_line_pointer[1] != '\'' | |
2586 | || (*input_line_pointer != 'A' | |
2587 | && *input_line_pointer != 'E'))) | |
2588 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); | |
2589 | else | |
40324362 | 2590 | { |
40324362 KR |
2591 | int scan = 0; |
2592 | unsigned int result = 0; | |
1356d77d ILT |
2593 | |
2594 | /* An MRI style string. Cut into as many bytes as will fit into | |
2595 | a nbyte chunk, left justify if necessary, and separate with | |
2596 | commas so we can try again later. */ | |
2597 | if (*input_line_pointer == 'A') | |
2598 | ++input_line_pointer; | |
2599 | else if (*input_line_pointer == 'E') | |
2600 | { | |
2601 | as_bad ("EBCDIC constants are not supported"); | |
2602 | ++input_line_pointer; | |
2603 | } | |
2604 | ||
40324362 KR |
2605 | input_line_pointer++; |
2606 | for (scan = 0; scan < nbytes; scan++) | |
2607 | { | |
2608 | if (*input_line_pointer == '\'') | |
2609 | { | |
2610 | if (input_line_pointer[1] == '\'') | |
6efd877d | 2611 | { |
40324362 | 2612 | input_line_pointer++; |
f8701a3f | 2613 | } |
40324362 KR |
2614 | else |
2615 | break; | |
9471a360 | 2616 | } |
40324362 KR |
2617 | result = (result << 8) | (*input_line_pointer++); |
2618 | } | |
f8701a3f | 2619 | |
40324362 KR |
2620 | /* Left justify */ |
2621 | while (scan < nbytes) | |
2622 | { | |
2623 | result <<= 8; | |
2624 | scan++; | |
2625 | } | |
2626 | /* Create correct expression */ | |
5ac34ac3 | 2627 | exp->X_op = O_constant; |
40324362 | 2628 | exp->X_add_number = result; |
40324362 KR |
2629 | /* Fake it so that we can read the next char too */ |
2630 | if (input_line_pointer[0] != '\'' || | |
2631 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
2632 | { | |
2633 | input_line_pointer -= 2; | |
2634 | input_line_pointer[0] = ','; | |
2635 | input_line_pointer[1] = '\''; | |
2636 | } | |
2637 | else | |
2638 | input_line_pointer++; | |
2639 | } | |
40324362 | 2640 | } |
40324362 KR |
2641 | \f |
2642 | #ifdef REPEAT_CONS_EXPRESSIONS | |
2643 | ||
2644 | /* Parse a repeat expression for cons. This is used by the MIPS | |
2645 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
2646 | object file COUNT times. | |
2647 | ||
2648 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
2649 | ||
2650 | static void | |
2651 | parse_repeat_cons (exp, nbytes) | |
2652 | expressionS *exp; | |
2653 | unsigned int nbytes; | |
2654 | { | |
2655 | expressionS count; | |
40324362 KR |
2656 | register int i; |
2657 | ||
2658 | expression (exp); | |
2659 | ||
2660 | if (*input_line_pointer != ':') | |
2661 | { | |
2662 | /* No repeat count. */ | |
2663 | return; | |
2664 | } | |
2665 | ||
2666 | ++input_line_pointer; | |
5ac34ac3 ILT |
2667 | expression (&count); |
2668 | if (count.X_op != O_constant | |
40324362 KR |
2669 | || count.X_add_number <= 0) |
2670 | { | |
2671 | as_warn ("Unresolvable or nonpositive repeat count; using 1"); | |
2672 | return; | |
2673 | } | |
2674 | ||
2675 | /* The cons function is going to output this expression once. So we | |
2676 | output it count - 1 times. */ | |
2677 | for (i = count.X_add_number - 1; i > 0; i--) | |
2678 | emit_expr (exp, nbytes); | |
2679 | } | |
2680 | ||
2681 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
fecd2382 | 2682 | \f |
e28c40d7 ILT |
2683 | /* Parse a floating point number represented as a hex constant. This |
2684 | permits users to specify the exact bits they want in the floating | |
2685 | point number. */ | |
2686 | ||
2687 | static int | |
2688 | hex_float (float_type, bytes) | |
2689 | int float_type; | |
2690 | char *bytes; | |
2691 | { | |
2692 | int length; | |
2693 | int i; | |
2694 | ||
2695 | switch (float_type) | |
2696 | { | |
2697 | case 'f': | |
2698 | case 'F': | |
2699 | case 's': | |
2700 | case 'S': | |
2701 | length = 4; | |
2702 | break; | |
2703 | ||
2704 | case 'd': | |
2705 | case 'D': | |
2706 | case 'r': | |
2707 | case 'R': | |
2708 | length = 8; | |
2709 | break; | |
2710 | ||
2711 | case 'x': | |
2712 | case 'X': | |
2713 | length = 12; | |
2714 | break; | |
2715 | ||
2716 | case 'p': | |
2717 | case 'P': | |
2718 | length = 12; | |
2719 | break; | |
2720 | ||
2721 | default: | |
2722 | as_bad ("Unknown floating type type '%c'", float_type); | |
2723 | return -1; | |
2724 | } | |
2725 | ||
2726 | /* It would be nice if we could go through expression to parse the | |
2727 | hex constant, but if we get a bignum it's a pain to sort it into | |
2728 | the buffer correctly. */ | |
2729 | i = 0; | |
2730 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') | |
2731 | { | |
2732 | int d; | |
2733 | ||
2734 | /* The MRI assembler accepts arbitrary underscores strewn about | |
2735 | through the hex constant, so we ignore them as well. */ | |
2736 | if (*input_line_pointer == '_') | |
2737 | { | |
2738 | ++input_line_pointer; | |
2739 | continue; | |
2740 | } | |
2741 | ||
2742 | if (i >= length) | |
2743 | { | |
2744 | as_warn ("Floating point constant too large"); | |
2745 | return -1; | |
2746 | } | |
2747 | d = hex_value (*input_line_pointer) << 4; | |
2748 | ++input_line_pointer; | |
2749 | while (*input_line_pointer == '_') | |
2750 | ++input_line_pointer; | |
2751 | if (hex_p (*input_line_pointer)) | |
2752 | { | |
2753 | d += hex_value (*input_line_pointer); | |
2754 | ++input_line_pointer; | |
2755 | } | |
a920b693 ILT |
2756 | if (target_big_endian) |
2757 | bytes[i] = d; | |
2758 | else | |
2759 | bytes[length - i - 1] = d; | |
2760 | ++i; | |
e28c40d7 ILT |
2761 | } |
2762 | ||
2763 | if (i < length) | |
a920b693 ILT |
2764 | { |
2765 | if (target_big_endian) | |
2766 | memset (bytes + i, 0, length - i); | |
2767 | else | |
2768 | memset (bytes, 0, length - i); | |
2769 | } | |
e28c40d7 ILT |
2770 | |
2771 | return length; | |
2772 | } | |
2773 | ||
fecd2382 RP |
2774 | /* |
2775 | * float_cons() | |
2776 | * | |
2777 | * CONStruct some more frag chars of .floats .ffloats etc. | |
2778 | * Makes 0 or more new frags. | |
2779 | * If need_pass_2 == 1, no frags are emitted. | |
2780 | * This understands only floating literals, not expressions. Sorry. | |
2781 | * | |
2782 | * A floating constant is defined by atof_generic(), except it is preceded | |
2783 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
2784 | * reading, I decided to be incompatible. This always tries to give you | |
2785 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
2786 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
2787 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
2788 | * scanners you directed AS to use. | |
2789 | * | |
2790 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
2791 | * | |
2792 | */ | |
2793 | ||
ba71c54d KR |
2794 | void |
2795 | float_cons (float_type) | |
6efd877d | 2796 | /* Clobbers input_line-pointer, checks end-of-line. */ |
f8701a3f | 2797 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ |
fecd2382 | 2798 | { |
6efd877d | 2799 | register char *p; |
6efd877d KR |
2800 | int length; /* Number of chars in an object. */ |
2801 | register char *err; /* Error from scanning floating literal. */ | |
2802 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
f8701a3f | 2803 | |
6efd877d | 2804 | if (is_it_end_of_statement ()) |
f8701a3f | 2805 | { |
1e9cf565 ILT |
2806 | demand_empty_rest_of_line (); |
2807 | return; | |
f8701a3f | 2808 | } |
1e9cf565 ILT |
2809 | |
2810 | do | |
f8701a3f SC |
2811 | { |
2812 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
6efd877d | 2813 | SKIP_WHITESPACE (); |
1e9cf565 | 2814 | |
f8701a3f SC |
2815 | /* Skip any 0{letter} that may be present. Don't even check if the |
2816 | * letter is legal. Someone may invent a "z" format and this routine | |
2817 | * has no use for such information. Lusers beware: you get | |
2818 | * diagnostics if your input is ill-conditioned. | |
2819 | */ | |
6efd877d KR |
2820 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) |
2821 | input_line_pointer += 2; | |
f8701a3f | 2822 | |
1356d77d ILT |
2823 | /* Accept :xxxx, where the x's are hex digits, for a floating |
2824 | point with the exact digits specified. */ | |
2825 | if (input_line_pointer[0] == ':') | |
f8701a3f | 2826 | { |
e28c40d7 ILT |
2827 | ++input_line_pointer; |
2828 | length = hex_float (float_type, temp); | |
2829 | if (length < 0) | |
1356d77d | 2830 | { |
1356d77d ILT |
2831 | ignore_rest_of_line (); |
2832 | return; | |
2833 | } | |
1356d77d ILT |
2834 | } |
2835 | else | |
2836 | { | |
2837 | err = md_atof (float_type, temp, &length); | |
2838 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
2839 | know (length > 0); | |
2840 | if (err) | |
2841 | { | |
2842 | as_bad ("Bad floating literal: %s", err); | |
2843 | ignore_rest_of_line (); | |
2844 | return; | |
2845 | } | |
f8701a3f | 2846 | } |
1e9cf565 ILT |
2847 | |
2848 | if (!need_pass_2) | |
f8701a3f | 2849 | { |
1e9cf565 ILT |
2850 | int count; |
2851 | ||
2852 | count = 1; | |
2853 | ||
2854 | #ifdef REPEAT_CONS_EXPRESSIONS | |
2855 | if (*input_line_pointer == ':') | |
2856 | { | |
1e9cf565 ILT |
2857 | expressionS count_exp; |
2858 | ||
2859 | ++input_line_pointer; | |
5ac34ac3 ILT |
2860 | expression (&count_exp); |
2861 | if (count_exp.X_op != O_constant | |
1e9cf565 ILT |
2862 | || count_exp.X_add_number <= 0) |
2863 | { | |
5ac34ac3 | 2864 | as_warn ("unresolvable or nonpositive repeat count; using 1"); |
1e9cf565 ILT |
2865 | } |
2866 | else | |
2867 | count = count_exp.X_add_number; | |
2868 | } | |
2869 | #endif | |
2870 | ||
2871 | while (--count >= 0) | |
a39116f1 | 2872 | { |
f8701a3f | 2873 | p = frag_more (length); |
604633ae | 2874 | memcpy (p, temp, (unsigned int) length); |
a39116f1 | 2875 | } |
542e1629 | 2876 | } |
1e9cf565 | 2877 | SKIP_WHITESPACE (); |
f8701a3f | 2878 | } |
1e9cf565 ILT |
2879 | while (*input_line_pointer++ == ','); |
2880 | ||
2881 | --input_line_pointer; /* Put terminator back into stream. */ | |
6efd877d | 2882 | demand_empty_rest_of_line (); |
f8701a3f | 2883 | } /* float_cons() */ |
fecd2382 RP |
2884 | \f |
2885 | /* | |
2886 | * stringer() | |
2887 | * | |
2888 | * We read 0 or more ',' seperated, double-quoted strings. | |
2889 | * | |
2890 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
2891 | */ | |
a39116f1 RP |
2892 | |
2893 | ||
6efd877d KR |
2894 | void |
2895 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
2896 | /* Checks end-of-line. */ | |
f8701a3f | 2897 | register int append_zero; /* 0: don't append '\0', else 1 */ |
fecd2382 | 2898 | { |
f8701a3f | 2899 | register unsigned int c; |
6efd877d | 2900 | |
a2a5a4fa KR |
2901 | #ifdef md_flush_pending_output |
2902 | md_flush_pending_output (); | |
2903 | #endif | |
2904 | ||
f8701a3f SC |
2905 | /* |
2906 | * The following awkward logic is to parse ZERO or more strings, | |
2907 | * comma seperated. Recall a string expression includes spaces | |
2908 | * before the opening '\"' and spaces after the closing '\"'. | |
2909 | * We fake a leading ',' if there is (supposed to be) | |
2910 | * a 1st, expression. We keep demanding expressions for each | |
2911 | * ','. | |
2912 | */ | |
6efd877d KR |
2913 | if (is_it_end_of_statement ()) |
2914 | { | |
2915 | c = 0; /* Skip loop. */ | |
2916 | ++input_line_pointer; /* Compensate for end of loop. */ | |
2917 | } | |
f8701a3f | 2918 | else |
6efd877d KR |
2919 | { |
2920 | c = ','; /* Do loop. */ | |
2921 | } | |
2922 | while (c == ',' || c == '<' || c == '"') | |
2923 | { | |
2924 | SKIP_WHITESPACE (); | |
2925 | switch (*input_line_pointer) | |
2926 | { | |
2927 | case '\"': | |
2928 | ++input_line_pointer; /*->1st char of string. */ | |
2929 | while (is_a_char (c = next_char_of_string ())) | |
2930 | { | |
2931 | FRAG_APPEND_1_CHAR (c); | |
2932 | } | |
2933 | if (append_zero) | |
2934 | { | |
2935 | FRAG_APPEND_1_CHAR (0); | |
2936 | } | |
2937 | know (input_line_pointer[-1] == '\"'); | |
2938 | break; | |
2939 | case '<': | |
2940 | input_line_pointer++; | |
2941 | c = get_single_number (); | |
2942 | FRAG_APPEND_1_CHAR (c); | |
2943 | if (*input_line_pointer != '>') | |
2944 | { | |
2945 | as_bad ("Expected <nn>"); | |
2946 | } | |
2947 | input_line_pointer++; | |
2948 | break; | |
2949 | case ',': | |
2950 | input_line_pointer++; | |
2951 | break; | |
2952 | } | |
2953 | SKIP_WHITESPACE (); | |
2954 | c = *input_line_pointer; | |
f8701a3f | 2955 | } |
f8701a3f | 2956 | |
6efd877d KR |
2957 | demand_empty_rest_of_line (); |
2958 | } /* stringer() */ | |
fecd2382 | 2959 | \f |
6efd877d | 2960 | /* FIXME-SOMEDAY: I had trouble here on characters with the |
f8701a3f SC |
2961 | high bits set. We'll probably also have trouble with |
2962 | multibyte chars, wide chars, etc. Also be careful about | |
2963 | returning values bigger than 1 byte. xoxorich. */ | |
fecd2382 | 2964 | |
6efd877d KR |
2965 | unsigned int |
2966 | next_char_of_string () | |
2967 | { | |
2968 | register unsigned int c; | |
2969 | ||
2970 | c = *input_line_pointer++ & CHAR_MASK; | |
2971 | switch (c) | |
2972 | { | |
2973 | case '\"': | |
2974 | c = NOT_A_CHAR; | |
2975 | break; | |
2976 | ||
ddb393cf | 2977 | #ifndef NO_STRING_ESCAPES |
6efd877d KR |
2978 | case '\\': |
2979 | switch (c = *input_line_pointer++) | |
2980 | { | |
2981 | case 'b': | |
2982 | c = '\b'; | |
2983 | break; | |
2984 | ||
2985 | case 'f': | |
2986 | c = '\f'; | |
2987 | break; | |
2988 | ||
2989 | case 'n': | |
2990 | c = '\n'; | |
2991 | break; | |
2992 | ||
2993 | case 'r': | |
2994 | c = '\r'; | |
2995 | break; | |
2996 | ||
2997 | case 't': | |
2998 | c = '\t'; | |
2999 | break; | |
3000 | ||
6efd877d KR |
3001 | case 'v': |
3002 | c = '\013'; | |
3003 | break; | |
6efd877d KR |
3004 | |
3005 | case '\\': | |
3006 | case '"': | |
3007 | break; /* As itself. */ | |
3008 | ||
3009 | case '0': | |
3010 | case '1': | |
3011 | case '2': | |
3012 | case '3': | |
3013 | case '4': | |
3014 | case '5': | |
3015 | case '6': | |
3016 | case '7': | |
3017 | case '8': | |
3018 | case '9': | |
3019 | { | |
3020 | long number; | |
d4c8cbd8 | 3021 | int i; |
6efd877d | 3022 | |
d4c8cbd8 | 3023 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) |
6efd877d KR |
3024 | { |
3025 | number = number * 8 + c - '0'; | |
3026 | } | |
3027 | c = number & 0xff; | |
3028 | } | |
3029 | --input_line_pointer; | |
3030 | break; | |
3031 | ||
d4c8cbd8 JL |
3032 | case 'x': |
3033 | case 'X': | |
3034 | { | |
3035 | long number; | |
3036 | ||
3037 | number = 0; | |
3038 | c = *input_line_pointer++; | |
3039 | while (isxdigit (c)) | |
3040 | { | |
3041 | if (isdigit (c)) | |
3042 | number = number * 16 + c - '0'; | |
3043 | else if (isupper (c)) | |
3044 | number = number * 16 + c - 'A' + 10; | |
3045 | else | |
3046 | number = number * 16 + c - 'a' + 10; | |
3047 | c = *input_line_pointer++; | |
3048 | } | |
3049 | c = number & 0xff; | |
3050 | --input_line_pointer; | |
3051 | } | |
3052 | break; | |
3053 | ||
6efd877d KR |
3054 | case '\n': |
3055 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
3056 | as_warn ("Unterminated string: Newline inserted."); | |
3057 | c = '\n'; | |
3058 | break; | |
3059 | ||
3060 | default: | |
3061 | ||
fecd2382 | 3062 | #ifdef ONLY_STANDARD_ESCAPES |
6efd877d KR |
3063 | as_bad ("Bad escaped character in string, '?' assumed"); |
3064 | c = '?'; | |
fecd2382 | 3065 | #endif /* ONLY_STANDARD_ESCAPES */ |
6efd877d KR |
3066 | |
3067 | break; | |
3068 | } /* switch on escaped char */ | |
3069 | break; | |
ddb393cf | 3070 | #endif /* ! defined (NO_STRING_ESCAPES) */ |
6efd877d KR |
3071 | |
3072 | default: | |
3073 | break; | |
3074 | } /* switch on char */ | |
3075 | return (c); | |
3076 | } /* next_char_of_string() */ | |
fecd2382 RP |
3077 | \f |
3078 | static segT | |
f8701a3f | 3079 | get_segmented_expression (expP) |
6efd877d | 3080 | register expressionS *expP; |
fecd2382 | 3081 | { |
6efd877d | 3082 | register segT retval; |
f8701a3f | 3083 | |
9471a360 | 3084 | retval = expression (expP); |
5ac34ac3 ILT |
3085 | if (expP->X_op == O_illegal |
3086 | || expP->X_op == O_absent | |
3087 | || expP->X_op == O_big) | |
f8701a3f | 3088 | { |
5ac34ac3 ILT |
3089 | as_bad ("expected address expression; zero assumed"); |
3090 | expP->X_op = O_constant; | |
6efd877d | 3091 | expP->X_add_number = 0; |
5ac34ac3 | 3092 | retval = absolute_section; |
f8701a3f | 3093 | } |
5ac34ac3 | 3094 | return retval; |
fecd2382 RP |
3095 | } |
3096 | ||
6efd877d KR |
3097 | static segT |
3098 | get_known_segmented_expression (expP) | |
3099 | register expressionS *expP; | |
fecd2382 | 3100 | { |
6efd877d | 3101 | register segT retval; |
f8701a3f | 3102 | |
9471a360 | 3103 | if ((retval = get_segmented_expression (expP)) == undefined_section) |
f8701a3f | 3104 | { |
5ac34ac3 ILT |
3105 | /* There is no easy way to extract the undefined symbol from the |
3106 | expression. */ | |
3107 | if (expP->X_add_symbol != NULL | |
3108 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
3109 | as_warn ("symbol \"%s\" undefined; zero assumed", | |
3110 | S_GET_NAME (expP->X_add_symbol)); | |
f8701a3f | 3111 | else |
5ac34ac3 ILT |
3112 | as_warn ("some symbol undefined; zero assumed"); |
3113 | retval = absolute_section; | |
3114 | expP->X_op = O_constant; | |
6efd877d | 3115 | expP->X_add_number = 0; |
f8701a3f | 3116 | } |
5ac34ac3 | 3117 | know (retval == absolute_section || SEG_NORMAL (retval)); |
f8701a3f | 3118 | return (retval); |
fecd2382 RP |
3119 | } /* get_known_segmented_expression() */ |
3120 | ||
58d4951d | 3121 | offsetT |
f8701a3f | 3122 | get_absolute_expression () |
fecd2382 | 3123 | { |
6efd877d | 3124 | expressionS exp; |
f8701a3f | 3125 | |
5ac34ac3 ILT |
3126 | expression (&exp); |
3127 | if (exp.X_op != O_constant) | |
f8701a3f | 3128 | { |
5ac34ac3 | 3129 | if (exp.X_op != O_absent) |
cd3b81bd | 3130 | as_bad ("bad or irreducible absolute expression; zero assumed"); |
6efd877d | 3131 | exp.X_add_number = 0; |
f8701a3f | 3132 | } |
5ac34ac3 | 3133 | return exp.X_add_number; |
fecd2382 RP |
3134 | } |
3135 | ||
6efd877d KR |
3136 | char /* return terminator */ |
3137 | get_absolute_expression_and_terminator (val_pointer) | |
3138 | long *val_pointer; /* return value of expression */ | |
fecd2382 | 3139 | { |
58d4951d ILT |
3140 | /* FIXME: val_pointer should probably be offsetT *. */ |
3141 | *val_pointer = (long) get_absolute_expression (); | |
6efd877d | 3142 | return (*input_line_pointer++); |
fecd2382 RP |
3143 | } |
3144 | \f | |
3145 | /* | |
3146 | * demand_copy_C_string() | |
3147 | * | |
3148 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
3149 | * Give a warning if that happens. | |
3150 | */ | |
3151 | char * | |
f8701a3f | 3152 | demand_copy_C_string (len_pointer) |
6efd877d | 3153 | int *len_pointer; |
fecd2382 | 3154 | { |
6efd877d | 3155 | register char *s; |
f8701a3f | 3156 | |
6efd877d | 3157 | if ((s = demand_copy_string (len_pointer)) != 0) |
f8701a3f SC |
3158 | { |
3159 | register int len; | |
3160 | ||
6efd877d | 3161 | for (len = *len_pointer; |
f8701a3f SC |
3162 | len > 0; |
3163 | len--) | |
3164 | { | |
6efd877d | 3165 | if (*s == 0) |
fecd2382 | 3166 | { |
f8701a3f SC |
3167 | s = 0; |
3168 | len = 1; | |
6efd877d KR |
3169 | *len_pointer = 0; |
3170 | as_bad ("This string may not contain \'\\0\'"); | |
fecd2382 | 3171 | } |
f8701a3f SC |
3172 | } |
3173 | } | |
3174 | return (s); | |
fecd2382 RP |
3175 | } |
3176 | \f | |
3177 | /* | |
3178 | * demand_copy_string() | |
3179 | * | |
3180 | * Demand string, but return a safe (=private) copy of the string. | |
3181 | * Return NULL if we can't read a string here. | |
3182 | */ | |
6ef37255 | 3183 | char * |
6efd877d KR |
3184 | demand_copy_string (lenP) |
3185 | int *lenP; | |
fecd2382 | 3186 | { |
6efd877d KR |
3187 | register unsigned int c; |
3188 | register int len; | |
3189 | char *retval; | |
3190 | ||
3191 | len = 0; | |
3192 | SKIP_WHITESPACE (); | |
3193 | if (*input_line_pointer == '\"') | |
3194 | { | |
3195 | input_line_pointer++; /* Skip opening quote. */ | |
3196 | ||
3197 | while (is_a_char (c = next_char_of_string ())) | |
3198 | { | |
3199 | obstack_1grow (¬es, c); | |
3200 | len++; | |
fecd2382 | 3201 | } |
6efd877d KR |
3202 | /* JF this next line is so demand_copy_C_string will return a null |
3203 | termanated string. */ | |
3204 | obstack_1grow (¬es, '\0'); | |
3205 | retval = obstack_finish (¬es); | |
3206 | } | |
3207 | else | |
3208 | { | |
3209 | as_warn ("Missing string"); | |
3210 | retval = NULL; | |
3211 | ignore_rest_of_line (); | |
3212 | } | |
3213 | *lenP = len; | |
3214 | return (retval); | |
3215 | } /* demand_copy_string() */ | |
fecd2382 RP |
3216 | \f |
3217 | /* | |
3218 | * is_it_end_of_statement() | |
3219 | * | |
3220 | * In: Input_line_pointer->next character. | |
3221 | * | |
3222 | * Do: Skip input_line_pointer over all whitespace. | |
3223 | * | |
3224 | * Out: 1 if input_line_pointer->end-of-line. | |
f8701a3f | 3225 | */ |
6efd877d KR |
3226 | int |
3227 | is_it_end_of_statement () | |
3228 | { | |
3229 | SKIP_WHITESPACE (); | |
58d4951d | 3230 | return (is_end_of_line[(unsigned char) *input_line_pointer]); |
6efd877d | 3231 | } /* is_it_end_of_statement() */ |
fecd2382 | 3232 | |
6efd877d KR |
3233 | void |
3234 | equals (sym_name) | |
3235 | char *sym_name; | |
fecd2382 | 3236 | { |
6efd877d | 3237 | register symbolS *symbolP; /* symbol we are working with */ |
f8701a3f SC |
3238 | |
3239 | input_line_pointer++; | |
6efd877d | 3240 | if (*input_line_pointer == '=') |
f8701a3f SC |
3241 | input_line_pointer++; |
3242 | ||
6efd877d | 3243 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') |
f8701a3f SC |
3244 | input_line_pointer++; |
3245 | ||
6efd877d KR |
3246 | if (sym_name[0] == '.' && sym_name[1] == '\0') |
3247 | { | |
3248 | /* Turn '. = mumble' into a .org mumble */ | |
3249 | register segT segment; | |
3250 | expressionS exp; | |
f8701a3f | 3251 | |
6efd877d KR |
3252 | segment = get_known_segmented_expression (&exp); |
3253 | if (!need_pass_2) | |
e28c40d7 | 3254 | do_org (segment, &exp, 0); |
6efd877d KR |
3255 | } |
3256 | else | |
3257 | { | |
3258 | symbolP = symbol_find_or_make (sym_name); | |
3259 | pseudo_set (symbolP); | |
3260 | } | |
3261 | } /* equals() */ | |
fecd2382 RP |
3262 | |
3263 | /* .include -- include a file at this point. */ | |
3264 | ||
3265 | /* ARGSUSED */ | |
6efd877d KR |
3266 | void |
3267 | s_include (arg) | |
3268 | int arg; | |
fecd2382 | 3269 | { |
f8701a3f SC |
3270 | char *newbuf; |
3271 | char *filename; | |
3272 | int i; | |
3273 | FILE *try; | |
3274 | char *path; | |
3275 | ||
6efd877d KR |
3276 | filename = demand_copy_string (&i); |
3277 | demand_empty_rest_of_line (); | |
604633ae | 3278 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); |
6efd877d KR |
3279 | for (i = 0; i < include_dir_count; i++) |
3280 | { | |
3281 | strcpy (path, include_dirs[i]); | |
3282 | strcat (path, "/"); | |
3283 | strcat (path, filename); | |
f2889110 | 3284 | if (0 != (try = fopen (path, "r"))) |
6efd877d KR |
3285 | { |
3286 | fclose (try); | |
3287 | goto gotit; | |
3288 | } | |
3289 | } | |
3290 | free (path); | |
f8701a3f SC |
3291 | path = filename; |
3292 | gotit: | |
3293 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
3294 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
3295 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
6efd877d | 3296 | } /* s_include() */ |
fecd2382 | 3297 | |
6efd877d KR |
3298 | void |
3299 | add_include_dir (path) | |
3300 | char *path; | |
fecd2382 | 3301 | { |
f8701a3f SC |
3302 | int i; |
3303 | ||
3304 | if (include_dir_count == 0) | |
3305 | { | |
6efd877d | 3306 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); |
f8701a3f SC |
3307 | include_dirs[0] = "."; /* Current dir */ |
3308 | include_dir_count = 2; | |
3309 | } | |
3310 | else | |
3311 | { | |
3312 | include_dir_count++; | |
6efd877d KR |
3313 | include_dirs = (char **) realloc (include_dirs, |
3314 | include_dir_count * sizeof (*include_dirs)); | |
f8701a3f SC |
3315 | } |
3316 | ||
6efd877d | 3317 | include_dirs[include_dir_count - 1] = path; /* New one */ |
f8701a3f | 3318 | |
6efd877d KR |
3319 | i = strlen (path); |
3320 | if (i > include_dir_maxlen) | |
3321 | include_dir_maxlen = i; | |
3322 | } /* add_include_dir() */ | |
fecd2382 | 3323 | |
6efd877d KR |
3324 | void |
3325 | s_ignore (arg) | |
3326 | int arg; | |
fecd2382 | 3327 | { |
58d4951d | 3328 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
3329 | { |
3330 | ++input_line_pointer; | |
3331 | } | |
3332 | ++input_line_pointer; | |
4064305e SS |
3333 | } |
3334 | ||
604633ae | 3335 | |
fecd2382 | 3336 | /* end of read.c */ |