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" |
7e047ac2 ILT |
45 | #include "sb.h" |
46 | #include "macro.h" | |
1356d77d | 47 | #include "libiberty.h" |
fecd2382 | 48 | #include "obstack.h" |
9a7d824a ILT |
49 | #include "listing.h" |
50 | ||
9a7d824a ILT |
51 | #ifndef TC_START_LABEL |
52 | #define TC_START_LABEL(x,y) (x==':') | |
53 | #endif | |
fecd2382 | 54 | |
016e0d42 ILT |
55 | /* The NOP_OPCODE is for the alignment fill value. |
56 | * fill it a nop instruction so that the disassembler does not choke | |
57 | * on it | |
58 | */ | |
59 | #ifndef NOP_OPCODE | |
60 | #define NOP_OPCODE 0x00 | |
61 | #endif | |
62 | ||
63 | char *input_line_pointer; /*->next char of source file to parse. */ | |
fecd2382 | 64 | |
326d16ca | 65 | int generate_asm_lineno = 0; /* flag to generate line stab for .s file */ |
daad3bbf | 66 | |
fecd2382 | 67 | #if BITS_PER_CHAR != 8 |
6efd877d KR |
68 | /* The following table is indexed by[(char)] and will break if |
69 | a char does not have exactly 256 states (hopefully 0:255!)! */ | |
70 | die horribly; | |
fecd2382 | 71 | #endif |
f8701a3f | 72 | |
c978e704 ILT |
73 | #ifndef LEX_AT |
74 | /* The m88k unfortunately uses @ as a label beginner. */ | |
75 | #define LEX_AT 0 | |
76 | #endif | |
77 | ||
ddb393cf ILT |
78 | #ifndef LEX_BR |
79 | /* The RS/6000 assembler uses {,},[,] as parts of symbol names. */ | |
80 | #define LEX_BR 0 | |
81 | #endif | |
82 | ||
6ef37255 KR |
83 | #ifndef LEX_PCT |
84 | /* The Delta 68k assembler permits % inside label names. */ | |
85 | #define LEX_PCT 0 | |
86 | #endif | |
87 | ||
016e0d42 | 88 | /* used by is_... macros. our ctype[] */ |
1356d77d | 89 | char lex_type[256] = |
016e0d42 ILT |
90 | { |
91 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* @ABCDEFGHIJKLMNO */ | |
92 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* PQRSTUVWXYZ[\]^_ */ | |
6ef37255 | 93 | 0, 0, 0, 0, 3, LEX_PCT, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, /* _!"#$%&'()*+,-./ */ |
016e0d42 | 94 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 0123456789:;<=>? */ |
c978e704 | 95 | LEX_AT, 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, 3, /* PQRSTUVWXYZ[\]^_ */ |
016e0d42 | 97 | 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* `abcdefghijklmno */ |
ddb393cf | 98 | 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, LEX_BR, 0, LEX_BR, 0, 0, /* pqrstuvwxyz{|}~. */ |
016e0d42 ILT |
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 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
105 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
106 | }; | |
107 | ||
108 | ||
109 | /* | |
fecd2382 RP |
110 | * In: a character. |
111 | * Out: 1 if this character ends a line. | |
112 | */ | |
113 | #define _ (0) | |
016e0d42 ILT |
114 | char is_end_of_line[256] = |
115 | { | |
fecd2382 | 116 | #ifdef CR_EOL |
016e0d42 | 117 | _, _, _, _, _, _, _, _, _, _, 99, _, _, 99, _, _, /* @abcdefghijklmno */ |
fecd2382 | 118 | #else |
016e0d42 | 119 | _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, _, /* @abcdefghijklmno */ |
fecd2382 | 120 | #endif |
016e0d42 | 121 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
40324362 KR |
122 | #ifdef TC_HPPA |
123 | _,99, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* _!"#$%&'()*+,-./ */ | |
124 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* 0123456789:;<=>? */ | |
125 | #else | |
016e0d42 ILT |
126 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
127 | _, _, _, _, _, _, _, _, _, _, _, 99, _, _, _, _, /* 0123456789:;<=>? */ | |
40324362 | 128 | #endif |
016e0d42 ILT |
129 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ |
130 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
131 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
132 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
133 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
134 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
135 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
136 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
137 | _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, /* */ | |
138 | }; | |
fecd2382 RP |
139 | #undef _ |
140 | ||
016e0d42 ILT |
141 | /* Functions private to this file. */ |
142 | ||
143 | static char *buffer; /* 1st char of each buffer of lines is here. */ | |
144 | static char *buffer_limit; /*->1 + last char in buffer. */ | |
fecd2382 | 145 | |
2209b19c KR |
146 | #ifdef TARGET_BYTES_BIG_ENDIAN |
147 | /* Hack to deal with tc-*.h defining TARGET_BYTES_BIG_ENDIAN to empty | |
148 | instead of to 0 or 1. */ | |
149 | #if 5 - TARGET_BYTES_BIG_ENDIAN - 5 == 10 | |
150 | #undef TARGET_BYTES_BIG_ENDIAN | |
151 | #define TARGET_BYTES_BIG_ENDIAN 1 | |
152 | #endif | |
153 | int target_big_endian = TARGET_BYTES_BIG_ENDIAN; | |
154 | #else | |
155 | int target_big_endian /* = 0 */; | |
156 | #endif | |
9c6d3f66 | 157 | |
9471a360 | 158 | static char *old_buffer; /* JF a hack */ |
016e0d42 ILT |
159 | static char *old_input; |
160 | static char *old_limit; | |
fecd2382 | 161 | |
016e0d42 | 162 | /* Variables for handling include file directory list. */ |
fecd2382 | 163 | |
016e0d42 ILT |
164 | char **include_dirs; /* List of pointers to directories to |
165 | search for .include's */ | |
166 | int include_dir_count; /* How many are in the list */ | |
167 | int include_dir_maxlen = 1;/* Length of longest in list */ | |
fecd2382 RP |
168 | |
169 | #ifndef WORKING_DOT_WORD | |
016e0d42 | 170 | struct broken_word *broken_words; |
9471a360 | 171 | int new_broken_words; |
fecd2382 RP |
172 | #endif |
173 | ||
e28c40d7 ILT |
174 | /* The current offset into the absolute section. We don't try to |
175 | build frags in the absolute section, since no data can be stored | |
176 | there. We just keep track of the current offset. */ | |
177 | addressT abs_section_offset; | |
178 | ||
1356d77d ILT |
179 | /* If this line had an MRI style label, it is stored in this variable. |
180 | This is used by some of the MRI pseudo-ops. */ | |
7e047ac2 | 181 | symbolS *line_label; |
1356d77d ILT |
182 | |
183 | /* This global variable is used to support MRI common sections. We | |
184 | translate such sections into a common symbol. This variable is | |
185 | non-NULL when we are in an MRI common section. */ | |
186 | symbolS *mri_common_symbol; | |
187 | ||
286cb27a ILT |
188 | /* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we |
189 | need to align to an even byte boundary unless the next pseudo-op is | |
190 | dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment | |
191 | may be needed. */ | |
192 | static int mri_pending_align; | |
193 | ||
194 | static void do_align PARAMS ((int, char *)); | |
e28c40d7 ILT |
195 | static int hex_float PARAMS ((int, char *)); |
196 | static void do_org PARAMS ((segT, expressionS *, int)); | |
6ef37255 | 197 | char *demand_copy_string PARAMS ((int *lenP)); |
016e0d42 | 198 | int is_it_end_of_statement PARAMS ((void)); |
5ac34ac3 | 199 | static segT get_segmented_expression PARAMS ((expressionS *expP)); |
016e0d42 | 200 | static segT get_known_segmented_expression PARAMS ((expressionS * expP)); |
016e0d42 | 201 | static void pobegin PARAMS ((void)); |
7e047ac2 | 202 | static int get_line_sb PARAMS ((sb *)); |
fecd2382 | 203 | \f |
6efd877d | 204 | |
016e0d42 ILT |
205 | void |
206 | read_begin () | |
fecd2382 | 207 | { |
016e0d42 | 208 | const char *p; |
f8701a3f | 209 | |
6efd877d KR |
210 | pobegin (); |
211 | obj_read_begin_hook (); | |
f8701a3f | 212 | |
4380166d KR |
213 | /* Something close -- but not too close -- to a multiple of 1024. |
214 | The debugging malloc I'm using has 24 bytes of overhead. */ | |
215 | obstack_begin (¬es, 5090); | |
216 | obstack_begin (&cond_obstack, 990); | |
f8701a3f | 217 | |
f8701a3f SC |
218 | /* Use machine dependent syntax */ |
219 | for (p = line_separator_chars; *p; p++) | |
58d4951d | 220 | is_end_of_line[(unsigned char) *p] = 1; |
f8701a3f | 221 | /* Use more. FIXME-SOMEDAY. */ |
1356d77d ILT |
222 | |
223 | if (flag_mri) | |
224 | lex_type['?'] = 3; | |
fecd2382 RP |
225 | } |
226 | \f | |
227 | /* set up pseudo-op tables */ | |
228 | ||
1356d77d | 229 | static struct hash_control *po_hash; |
fecd2382 | 230 | |
016e0d42 | 231 | static const pseudo_typeS potable[] = |
fecd2382 | 232 | { |
6efd877d KR |
233 | {"abort", s_abort, 0}, |
234 | {"align", s_align_ptwo, 0}, | |
235 | {"ascii", stringer, 0}, | |
236 | {"asciz", stringer, 1}, | |
931a8fab | 237 | {"balign", s_align_bytes, 0}, |
f8701a3f | 238 | /* block */ |
6efd877d KR |
239 | {"byte", cons, 1}, |
240 | {"comm", s_comm, 0}, | |
1356d77d ILT |
241 | {"common", s_mri_common, 0}, |
242 | {"common.s", s_mri_common, 1}, | |
6efd877d | 243 | {"data", s_data, 0}, |
1356d77d ILT |
244 | {"dc", cons, 2}, |
245 | {"dc.b", cons, 1}, | |
246 | {"dc.d", float_cons, 'd'}, | |
247 | {"dc.l", cons, 4}, | |
248 | {"dc.s", float_cons, 'f'}, | |
249 | {"dc.w", cons, 2}, | |
250 | {"dc.x", float_cons, 'x'}, | |
e28c40d7 ILT |
251 | {"dcb", s_space, 2}, |
252 | {"dcb.b", s_space, 1}, | |
253 | {"dcb.d", s_float_space, 'd'}, | |
254 | {"dcb.l", s_space, 4}, | |
255 | {"dcb.s", s_float_space, 'f'}, | |
256 | {"dcb.w", s_space, 2}, | |
257 | {"dcb.x", s_float_space, 'x'}, | |
1356d77d ILT |
258 | {"ds", s_space, 2}, |
259 | {"ds.b", s_space, 1}, | |
e28c40d7 | 260 | {"ds.d", s_space, 8}, |
1356d77d | 261 | {"ds.l", s_space, 4}, |
e28c40d7 ILT |
262 | {"ds.p", s_space, 12}, |
263 | {"ds.s", s_space, 4}, | |
1356d77d | 264 | {"ds.w", s_space, 2}, |
e28c40d7 | 265 | {"ds.x", s_space, 12}, |
604633ae | 266 | #ifdef S_SET_DESC |
4064305e | 267 | {"desc", s_desc, 0}, |
604633ae | 268 | #endif |
f8701a3f | 269 | /* dim */ |
6efd877d | 270 | {"double", float_cons, 'd'}, |
f8701a3f | 271 | /* dsect */ |
6efd877d KR |
272 | {"eject", listing_eject, 0}, /* Formfeed listing */ |
273 | {"else", s_else, 0}, | |
e28c40d7 | 274 | {"elsec", s_else, 0}, |
6efd877d | 275 | {"end", s_end, 0}, |
e28c40d7 | 276 | {"endc", s_endif, 0}, |
6efd877d | 277 | {"endif", s_endif, 0}, |
f8701a3f | 278 | /* endef */ |
6efd877d | 279 | {"equ", s_set, 0}, |
f8701a3f | 280 | /* err */ |
7e047ac2 | 281 | {"exitm", s_mexit, 0}, |
f8701a3f | 282 | /* extend */ |
6efd877d | 283 | {"extern", s_ignore, 0}, /* We treat all undef as ext */ |
9a7d824a ILT |
284 | {"appfile", s_app_file, 1}, |
285 | {"appline", s_app_line, 0}, | |
e28c40d7 | 286 | {"fail", s_fail, 0}, |
6efd877d KR |
287 | {"file", s_app_file, 0}, |
288 | {"fill", s_fill, 0}, | |
289 | {"float", float_cons, 'f'}, | |
e28c40d7 | 290 | {"format", s_ignore, 0}, |
6efd877d KR |
291 | {"global", s_globl, 0}, |
292 | {"globl", s_globl, 0}, | |
293 | {"hword", cons, 2}, | |
e28c40d7 | 294 | {"if", s_if, (int) O_ne}, |
7e047ac2 | 295 | {"ifc", s_ifc, 0}, |
6efd877d | 296 | {"ifdef", s_ifdef, 0}, |
e28c40d7 | 297 | {"ifeq", s_if, (int) O_eq}, |
6efd877d | 298 | {"ifeqs", s_ifeqs, 0}, |
e28c40d7 ILT |
299 | {"ifge", s_if, (int) O_ge}, |
300 | {"ifgt", s_if, (int) O_gt}, | |
301 | {"ifle", s_if, (int) O_le}, | |
302 | {"iflt", s_if, (int) O_lt}, | |
7e047ac2 | 303 | {"ifnc", s_ifc, 1}, |
6efd877d | 304 | {"ifndef", s_ifdef, 1}, |
e28c40d7 | 305 | {"ifne", s_if, (int) O_ne}, |
6efd877d KR |
306 | {"ifnes", s_ifeqs, 1}, |
307 | {"ifnotdef", s_ifdef, 1}, | |
308 | {"include", s_include, 0}, | |
309 | {"int", cons, 4}, | |
7e047ac2 ILT |
310 | {"irp", s_irp, 0}, |
311 | {"irpc", s_irp, 1}, | |
6efd877d KR |
312 | {"lcomm", s_lcomm, 0}, |
313 | {"lflags", listing_flags, 0}, /* Listing flags */ | |
314 | {"list", listing_list, 1}, /* Turn listing on */ | |
e28c40d7 | 315 | {"llen", listing_psize, 1}, |
6efd877d KR |
316 | {"long", cons, 4}, |
317 | {"lsym", s_lsym, 0}, | |
7e047ac2 ILT |
318 | {"macro", s_macro, 0}, |
319 | {"mexit", s_mexit, 0}, | |
e28c40d7 | 320 | {"noformat", s_ignore, 0}, |
6efd877d | 321 | {"nolist", listing_list, 0}, /* Turn listing off */ |
69e077f3 | 322 | {"nopage", listing_nopage, 0}, |
80aab579 | 323 | {"octa", cons, 16}, |
e28c40d7 | 324 | {"offset", s_struct, 0}, |
6efd877d | 325 | {"org", s_org, 0}, |
931a8fab | 326 | {"p2align", s_align_ptwo, 0}, |
69e077f3 ILT |
327 | {"page", listing_eject, 0}, |
328 | {"plen", listing_psize, 0}, | |
6efd877d | 329 | {"psize", listing_psize, 0}, /* set paper size */ |
f8701a3f | 330 | /* print */ |
80aab579 | 331 | {"quad", cons, 8}, |
7e047ac2 | 332 | {"rept", s_rept, 0}, |
6efd877d | 333 | {"sbttl", listing_title, 1}, /* Subtitle of listing */ |
f8701a3f SC |
334 | /* scl */ |
335 | /* sect */ | |
6efd877d KR |
336 | {"set", s_set, 0}, |
337 | {"short", cons, 2}, | |
338 | {"single", float_cons, 'f'}, | |
f8701a3f | 339 | /* size */ |
6efd877d | 340 | {"space", s_space, 0}, |
e14994d9 | 341 | {"spc", s_ignore, 0}, |
4064305e SS |
342 | {"stabd", s_stab, 'd'}, |
343 | {"stabn", s_stab, 'n'}, | |
344 | {"stabs", s_stab, 's'}, | |
ba71c54d | 345 | {"string", stringer, 1}, |
e28c40d7 | 346 | {"struct", s_struct, 0}, |
f8701a3f | 347 | /* tag */ |
6efd877d | 348 | {"text", s_text, 0}, |
6ef37255 KR |
349 | |
350 | /* This is for gcc to use. It's only just been added (2/94), so gcc | |
351 | won't be able to use it for a while -- probably a year or more. | |
352 | But once this has been released, check with gcc maintainers | |
353 | before deleting it or even changing the spelling. */ | |
354 | {"this_GCC_requires_the_GNU_assembler", s_ignore, 0}, | |
355 | /* If we're folding case -- done for some targets, not necessarily | |
356 | all -- the above string in an input file will be converted to | |
357 | this one. Match it either way... */ | |
358 | {"this_gcc_requires_the_gnu_assembler", s_ignore, 0}, | |
359 | ||
6efd877d | 360 | {"title", listing_title, 0}, /* Listing title */ |
e14994d9 | 361 | {"ttl", listing_title, 0}, |
f8701a3f SC |
362 | /* type */ |
363 | /* use */ | |
364 | /* val */ | |
e14994d9 | 365 | {"xcom", s_comm, 0}, |
1356d77d | 366 | {"xdef", s_globl, 0}, |
e14994d9 | 367 | {"xref", s_ignore, 0}, |
4064305e | 368 | {"xstabs", s_xstab, 's'}, |
6efd877d | 369 | {"word", cons, 2}, |
c02fd8dc | 370 | {"zero", s_space, 0}, |
6efd877d | 371 | {NULL} /* end sentinel */ |
fecd2382 RP |
372 | }; |
373 | ||
2209b19c KR |
374 | static int pop_override_ok = 0; |
375 | static const char *pop_table_name; | |
376 | ||
377 | void | |
378 | pop_insert (table) | |
379 | const pseudo_typeS *table; | |
6efd877d | 380 | { |
2209b19c | 381 | const char *errtxt; |
6efd877d | 382 | const pseudo_typeS *pop; |
2209b19c KR |
383 | for (pop = table; pop->poc_name; pop++) |
384 | { | |
385 | errtxt = hash_insert (po_hash, pop->poc_name, (char *) pop); | |
386 | if (errtxt && (!pop_override_ok || strcmp (errtxt, "exists"))) | |
387 | as_fatal ("error constructing %s pseudo-op table", pop_table_name); | |
388 | } | |
389 | } | |
6efd877d | 390 | |
2209b19c KR |
391 | #ifndef md_pop_insert |
392 | #define md_pop_insert() pop_insert(md_pseudo_table) | |
393 | #endif | |
394 | ||
395 | #ifndef obj_pop_insert | |
396 | #define obj_pop_insert() pop_insert(obj_pseudo_table) | |
397 | #endif | |
398 | ||
399 | static void | |
400 | pobegin () | |
401 | { | |
6efd877d KR |
402 | po_hash = hash_new (); |
403 | ||
404 | /* Do the target-specific pseudo ops. */ | |
2209b19c KR |
405 | pop_table_name = "md"; |
406 | md_pop_insert (); | |
6efd877d KR |
407 | |
408 | /* Now object specific. Skip any that were in the target table. */ | |
2209b19c KR |
409 | pop_table_name = "obj"; |
410 | pop_override_ok = 1; | |
411 | obj_pop_insert (); | |
6efd877d KR |
412 | |
413 | /* Now portable ones. Skip any that we've seen already. */ | |
2209b19c KR |
414 | pop_table_name = "standard"; |
415 | pop_insert (potable); | |
416 | } | |
fecd2382 | 417 | \f |
58d4951d ILT |
418 | #define HANDLE_CONDITIONAL_ASSEMBLY() \ |
419 | if (ignore_input ()) \ | |
420 | { \ | |
421 | while (! is_end_of_line[(unsigned char) *input_line_pointer++]) \ | |
422 | if (input_line_pointer == buffer_limit) \ | |
423 | break; \ | |
424 | continue; \ | |
f8701a3f | 425 | } |
a39116f1 | 426 | |
fecd2382 RP |
427 | |
428 | /* read_a_source_file() | |
429 | * | |
430 | * We read the file, putting things into a web that | |
431 | * represents what we have been reading. | |
432 | */ | |
6efd877d KR |
433 | void |
434 | read_a_source_file (name) | |
435 | char *name; | |
fecd2382 | 436 | { |
f8701a3f | 437 | register char c; |
6efd877d | 438 | register char *s; /* string of symbol, '\0' appended */ |
f8701a3f | 439 | register int temp; |
6efd877d | 440 | pseudo_typeS *pop; |
f8701a3f | 441 | |
6efd877d | 442 | buffer = input_scrub_new_file (name); |
f8701a3f | 443 | |
6efd877d KR |
444 | listing_file (name); |
445 | listing_newline (""); | |
f8701a3f | 446 | |
6efd877d KR |
447 | while ((buffer_limit = input_scrub_next_buffer (&input_line_pointer)) != 0) |
448 | { /* We have another line to parse. */ | |
449 | know (buffer_limit[-1] == '\n'); /* Must have a sentinel. */ | |
9471a360 KR |
450 | contin: /* JF this goto is my fault I admit it. |
451 | Someone brave please re-write the whole | |
452 | input section here? Pleeze??? */ | |
6efd877d | 453 | while (input_line_pointer < buffer_limit) |
9471a360 KR |
454 | { |
455 | /* We have more of this buffer to parse. */ | |
f8701a3f SC |
456 | |
457 | /* | |
458 | * We now have input_line_pointer->1st char of next line. | |
459 | * If input_line_pointer [-1] == '\n' then we just | |
460 | * scanned another line: so bump line counters. | |
461 | */ | |
d2550c72 | 462 | if (is_end_of_line[(unsigned char) input_line_pointer[-1]]) |
6efd877d | 463 | { |
a2a5a4fa KR |
464 | #ifdef md_start_line_hook |
465 | md_start_line_hook (); | |
466 | #endif | |
467 | ||
385ce433 JL |
468 | if (input_line_pointer[-1] == '\n') |
469 | bump_line_counters (); | |
f8701a3f | 470 | |
7e047ac2 ILT |
471 | line_label = NULL; |
472 | ||
1356d77d ILT |
473 | if (flag_mri |
474 | #ifdef LABELS_WITHOUT_COLONS | |
475 | || 1 | |
476 | #endif | |
477 | ) | |
6efd877d | 478 | { |
1356d77d ILT |
479 | /* Text at the start of a line must be a label, we |
480 | run down and stick a colon in. */ | |
481 | if (is_name_beginner (*input_line_pointer)) | |
482 | { | |
483 | char *line_start = input_line_pointer; | |
7e047ac2 ILT |
484 | char c; |
485 | ||
486 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
1356d77d | 487 | |
7e047ac2 ILT |
488 | c = get_symbol_end (); |
489 | ||
490 | /* In MRI mode, the EQU pseudoop must be | |
491 | handled specially. */ | |
492 | if (flag_mri) | |
1356d77d | 493 | { |
7e047ac2 ILT |
494 | char *rest = input_line_pointer + 1; |
495 | ||
496 | if (*rest == ':') | |
497 | ++rest; | |
498 | if (*rest == ' ' || *rest == '\t') | |
499 | ++rest; | |
500 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
501 | || strncasecmp (rest, "SET", 3) == 0) | |
502 | && (rest[3] == ' ' || rest[3] == '\t')) | |
1356d77d | 503 | { |
7e047ac2 ILT |
504 | input_line_pointer = rest + 3; |
505 | equals (line_start); | |
506 | continue; | |
1356d77d ILT |
507 | } |
508 | } | |
6efd877d | 509 | |
7e047ac2 ILT |
510 | line_label = colon (line_start); |
511 | ||
1356d77d ILT |
512 | *input_line_pointer = c; |
513 | if (c == ':') | |
514 | input_line_pointer++; | |
515 | } | |
6efd877d | 516 | } |
9471a360 | 517 | } |
f8701a3f | 518 | |
f8701a3f SC |
519 | /* |
520 | * We are at the begining of a line, or similar place. | |
521 | * We expect a well-formed assembler statement. | |
522 | * A "symbol-name:" is a statement. | |
523 | * | |
524 | * Depending on what compiler is used, the order of these tests | |
525 | * may vary to catch most common case 1st. | |
526 | * Each test is independent of all other tests at the (top) level. | |
527 | * PLEASE make a compiler that doesn't use this assembler. | |
528 | * It is crufty to waste a compiler's time encoding things for this | |
529 | * assembler, which then wastes more time decoding it. | |
530 | * (And communicating via (linear) files is silly! | |
531 | * If you must pass stuff, please pass a tree!) | |
532 | */ | |
9471a360 KR |
533 | if ((c = *input_line_pointer++) == '\t' |
534 | || c == ' ' | |
535 | || c == '\f' | |
536 | || c == 0) | |
6efd877d KR |
537 | { |
538 | c = *input_line_pointer++; | |
539 | } | |
540 | know (c != ' '); /* No further leading whitespace. */ | |
541 | LISTING_NEWLINE (); | |
f8701a3f SC |
542 | /* |
543 | * C is the 1st significant character. | |
544 | * Input_line_pointer points after that character. | |
545 | */ | |
6efd877d | 546 | if (is_name_beginner (c)) |
6ef37255 KR |
547 | { |
548 | /* want user-defined label or pseudo/opcode */ | |
6efd877d KR |
549 | HANDLE_CONDITIONAL_ASSEMBLY (); |
550 | ||
f8701a3f | 551 | s = --input_line_pointer; |
6efd877d | 552 | c = get_symbol_end (); /* name's delimiter */ |
f8701a3f SC |
553 | /* |
554 | * C is character after symbol. | |
555 | * That character's place in the input line is now '\0'. | |
556 | * S points to the beginning of the symbol. | |
557 | * [In case of pseudo-op, s->'.'.] | |
558 | * Input_line_pointer->'\0' where c was. | |
559 | */ | |
9a7d824a | 560 | if (TC_START_LABEL(c, input_line_pointer)) |
6efd877d | 561 | { |
7e047ac2 ILT |
562 | if (flag_mri) |
563 | { | |
564 | char *rest = input_line_pointer + 1; | |
565 | ||
566 | /* In MRI mode, \tsym: set 0 is permitted. */ | |
567 | ||
568 | if (*rest == ':') | |
569 | ++rest; | |
570 | if (*rest == ' ' || *rest == '\t') | |
571 | ++rest; | |
572 | if ((strncasecmp (rest, "EQU", 3) == 0 | |
573 | || strncasecmp (rest, "SET", 3) == 0) | |
574 | && (rest[3] == ' ' || rest[3] == '\t')) | |
575 | { | |
576 | input_line_pointer = rest + 3; | |
577 | equals (s); | |
578 | continue; | |
579 | } | |
580 | } | |
581 | ||
582 | line_label = colon (s); /* user-defined label */ | |
6efd877d | 583 | *input_line_pointer++ = ':'; /* Put ':' back for error messages' sake. */ |
f8701a3f | 584 | /* Input_line_pointer->after ':'. */ |
6efd877d KR |
585 | SKIP_WHITESPACE (); |
586 | ||
f8701a3f | 587 | |
6efd877d | 588 | } |
4064305e SS |
589 | else if (c == '=' |
590 | || (input_line_pointer[1] == '=' | |
591 | #ifdef TC_EQUAL_IN_INSN | |
592 | && ! TC_EQUAL_IN_INSN (c, input_line_pointer) | |
593 | #endif | |
594 | )) | |
9c6d3f66 | 595 | { |
6efd877d KR |
596 | equals (s); |
597 | demand_empty_rest_of_line (); | |
598 | } | |
599 | else | |
600 | { /* expect pseudo-op or machine instruction */ | |
8ff6f40e ILT |
601 | pop = NULL; |
602 | ||
d4c8cbd8 JL |
603 | #define IGNORE_OPCODE_CASE |
604 | #ifdef IGNORE_OPCODE_CASE | |
605 | { | |
606 | char *s2 = s; | |
607 | while (*s2) | |
608 | { | |
609 | if (isupper (*s2)) | |
610 | *s2 = tolower (*s2); | |
611 | s2++; | |
612 | } | |
613 | } | |
614 | #endif | |
615 | ||
1356d77d | 616 | if (flag_mri |
8ff6f40e | 617 | #ifdef NO_PSEUDO_DOT |
1356d77d | 618 | || 1 |
8ff6f40e | 619 | #endif |
1356d77d ILT |
620 | ) |
621 | { | |
622 | /* The MRI assembler and the m88k use pseudo-ops | |
623 | without a period. */ | |
624 | pop = (pseudo_typeS *) hash_find (po_hash, s); | |
625 | if (pop != NULL && pop->poc_handler == NULL) | |
626 | pop = NULL; | |
627 | } | |
8ff6f40e | 628 | |
7e047ac2 ILT |
629 | if (pop != NULL |
630 | || (! flag_mri && *s == '.')) | |
6efd877d KR |
631 | { |
632 | /* | |
9471a360 KR |
633 | * PSEUDO - OP. |
634 | * | |
635 | * WARNING: c has next char, which may be end-of-line. | |
636 | * We lookup the pseudo-op table with s+1 because we | |
637 | * already know that the pseudo-op begins with a '.'. | |
638 | */ | |
6efd877d | 639 | |
8ff6f40e ILT |
640 | if (pop == NULL) |
641 | pop = (pseudo_typeS *) hash_find (po_hash, s + 1); | |
6efd877d | 642 | |
286cb27a ILT |
643 | /* In MRI mode, we may need to insert an |
644 | automatic alignment directive. What a hack | |
645 | this is. */ | |
646 | if (mri_pending_align | |
647 | && (pop == NULL | |
648 | || ! ((pop->poc_handler == cons | |
649 | && pop->poc_val == 1) | |
650 | || (pop->poc_handler == s_space | |
651 | && pop->poc_val == 1)))) | |
652 | { | |
653 | do_align (1, (char *) NULL); | |
654 | mri_pending_align = 0; | |
655 | } | |
656 | ||
6efd877d | 657 | /* Print the error msg now, while we still can */ |
8ff6f40e | 658 | if (pop == NULL) |
6efd877d KR |
659 | { |
660 | as_bad ("Unknown pseudo-op: `%s'", s); | |
f8701a3f | 661 | *input_line_pointer = c; |
6efd877d | 662 | s_ignore (0); |
46b81190 | 663 | continue; |
6efd877d KR |
664 | } |
665 | ||
666 | /* Put it back for error messages etc. */ | |
667 | *input_line_pointer = c; | |
9c6d3f66 KR |
668 | /* The following skip of whitespace is compulsory. |
669 | A well shaped space is sometimes all that separates | |
670 | keyword from operands. */ | |
6efd877d | 671 | if (c == ' ' || c == '\t') |
d4c8cbd8 | 672 | input_line_pointer++; |
6efd877d | 673 | /* |
9471a360 KR |
674 | * Input_line is restored. |
675 | * Input_line_pointer->1st non-blank char | |
676 | * after pseudo-operation. | |
677 | */ | |
46b81190 | 678 | (*pop->poc_handler) (pop->poc_val); |
e28c40d7 ILT |
679 | |
680 | /* If that was .end, just get out now. */ | |
681 | if (pop->poc_handler == s_end) | |
682 | goto quit; | |
6efd877d KR |
683 | } |
684 | else | |
6efd877d | 685 | { /* machine instruction */ |
4026c122 ILT |
686 | int inquote = 0; |
687 | ||
286cb27a ILT |
688 | if (mri_pending_align) |
689 | { | |
690 | do_align (1, (char *) NULL); | |
691 | mri_pending_align = 0; | |
692 | } | |
693 | ||
6efd877d KR |
694 | /* WARNING: c has char, which may be end-of-line. */ |
695 | /* Also: input_line_pointer->`\0` where c was. */ | |
696 | *input_line_pointer = c; | |
58d4951d | 697 | while (!is_end_of_line[(unsigned char) *input_line_pointer] |
4026c122 | 698 | || inquote |
4064305e SS |
699 | #ifdef TC_EOL_IN_INSN |
700 | || TC_EOL_IN_INSN (input_line_pointer) | |
701 | #endif | |
702 | ) | |
6efd877d | 703 | { |
4026c122 ILT |
704 | if (flag_mri && *input_line_pointer == '\'') |
705 | inquote = ! inquote; | |
6efd877d KR |
706 | input_line_pointer++; |
707 | } | |
f8701a3f | 708 | |
6efd877d KR |
709 | c = *input_line_pointer; |
710 | *input_line_pointer = '\0'; | |
f8701a3f | 711 | |
326d16ca KH |
712 | #ifdef OBJ_GENERATE_ASM_LINENO |
713 | if (generate_asm_lineno == 0) | |
714 | { | |
f10a96cb | 715 | if (ecoff_no_current_file ()) |
326d16ca KH |
716 | generate_asm_lineno = 1; |
717 | } | |
f10a96cb ILT |
718 | if (generate_asm_lineno == 1) |
719 | { | |
1b434ced ILT |
720 | unsigned int lineno; |
721 | char *s; | |
722 | ||
daad3bbf | 723 | as_where (&s, &lineno); |
326d16ca | 724 | OBJ_GENERATE_ASM_LINENO (s, lineno); |
f10a96cb | 725 | } |
daad3bbf KH |
726 | #endif |
727 | ||
7e047ac2 ILT |
728 | if (macro_defined) |
729 | { | |
730 | sb out; | |
731 | const char *err; | |
732 | ||
733 | if (check_macro (s, &out, '\0', &err)) | |
734 | { | |
735 | if (err != NULL) | |
736 | as_bad (err); | |
737 | *input_line_pointer++ = c; | |
738 | input_scrub_include_sb (&out, | |
739 | input_line_pointer); | |
740 | sb_kill (&out); | |
741 | buffer_limit = | |
742 | input_scrub_next_buffer (&input_line_pointer); | |
743 | continue; | |
744 | } | |
745 | } | |
746 | ||
6efd877d | 747 | md_assemble (s); /* Assemble 1 instruction. */ |
f8701a3f | 748 | |
6efd877d | 749 | *input_line_pointer++ = c; |
f8701a3f | 750 | |
d4c8cbd8 JL |
751 | /* We resume loop AFTER the end-of-line from |
752 | this instruction. */ | |
6efd877d | 753 | } /* if (*s=='.') */ |
6efd877d | 754 | } /* if c==':' */ |
f8701a3f | 755 | continue; |
6efd877d | 756 | } /* if (is_name_beginner(c) */ |
f8701a3f | 757 | |
f8701a3f | 758 | |
d4c8cbd8 | 759 | /* Empty statement? */ |
58d4951d | 760 | if (is_end_of_line[(unsigned char) c]) |
d4c8cbd8 | 761 | continue; |
6efd877d | 762 | |
9777b772 KR |
763 | if ((LOCAL_LABELS_DOLLAR || LOCAL_LABELS_FB) |
764 | && isdigit (c)) | |
d4c8cbd8 JL |
765 | { |
766 | /* local label ("4:") */ | |
6efd877d KR |
767 | char *backup = input_line_pointer; |
768 | ||
769 | HANDLE_CONDITIONAL_ASSEMBLY (); | |
770 | ||
771 | temp = c - '0'; | |
772 | ||
773 | while (isdigit (*input_line_pointer)) | |
774 | { | |
775 | temp = (temp * 10) + *input_line_pointer - '0'; | |
776 | ++input_line_pointer; | |
777 | } /* read the whole number */ | |
778 | ||
9777b772 KR |
779 | if (LOCAL_LABELS_DOLLAR |
780 | && *input_line_pointer == '$' | |
6efd877d KR |
781 | && *(input_line_pointer + 1) == ':') |
782 | { | |
783 | input_line_pointer += 2; | |
784 | ||
785 | if (dollar_label_defined (temp)) | |
786 | { | |
787 | as_fatal ("label \"%d$\" redefined", temp); | |
788 | } | |
789 | ||
790 | define_dollar_label (temp); | |
791 | colon (dollar_label_name (temp, 0)); | |
792 | continue; | |
793 | } | |
6efd877d | 794 | |
9777b772 KR |
795 | if (LOCAL_LABELS_FB |
796 | && *input_line_pointer++ == ':') | |
6efd877d KR |
797 | { |
798 | fb_label_instance_inc (temp); | |
799 | colon (fb_label_name (temp, 0)); | |
800 | continue; | |
801 | } | |
6efd877d KR |
802 | |
803 | input_line_pointer = backup; | |
804 | } /* local label ("4:") */ | |
f8701a3f | 805 | |
6efd877d KR |
806 | if (c && strchr (line_comment_chars, c)) |
807 | { /* Its a comment. Better say APP or NO_APP */ | |
f8701a3f SC |
808 | char *ends; |
809 | char *new_buf; | |
810 | char *new_tmp; | |
604633ae | 811 | unsigned int new_length; |
f8701a3f | 812 | char *tmp_buf = 0; |
6efd877d KR |
813 | extern char *scrub_string, *scrub_last_string; |
814 | ||
815 | bump_line_counters (); | |
816 | s = input_line_pointer; | |
817 | if (strncmp (s, "APP\n", 4)) | |
818 | continue; /* We ignore it */ | |
819 | s += 4; | |
820 | ||
821 | ends = strstr (s, "#NO_APP\n"); | |
822 | ||
823 | if (!ends) | |
824 | { | |
604633ae ILT |
825 | unsigned int tmp_len; |
826 | unsigned int num; | |
6efd877d | 827 | |
f8701a3f SC |
828 | /* The end of the #APP wasn't in this buffer. We |
829 | keep reading in buffers until we find the #NO_APP | |
830 | that goes with this #APP There is one. The specs | |
831 | guarentee it. . . */ | |
6efd877d | 832 | tmp_len = buffer_limit - s; |
85825401 | 833 | tmp_buf = xmalloc (tmp_len + 1); |
4380166d | 834 | memcpy (tmp_buf, s, tmp_len); |
6efd877d KR |
835 | do |
836 | { | |
837 | new_tmp = input_scrub_next_buffer (&buffer); | |
f8701a3f | 838 | if (!new_tmp) |
6efd877d | 839 | break; |
f8701a3f | 840 | else |
6efd877d | 841 | buffer_limit = new_tmp; |
f8701a3f | 842 | input_line_pointer = buffer; |
6efd877d | 843 | ends = strstr (buffer, "#NO_APP\n"); |
f8701a3f | 844 | if (ends) |
6efd877d | 845 | num = ends - buffer; |
f8701a3f | 846 | else |
6efd877d KR |
847 | num = buffer_limit - buffer; |
848 | ||
849 | tmp_buf = xrealloc (tmp_buf, tmp_len + num); | |
9eb5f4b8 | 850 | memcpy (tmp_buf + tmp_len, buffer, num); |
6efd877d KR |
851 | tmp_len += num; |
852 | } | |
853 | while (!ends); | |
854 | ||
855 | input_line_pointer = ends ? ends + 8 : NULL; | |
856 | ||
857 | s = tmp_buf; | |
858 | ends = s + tmp_len; | |
859 | ||
860 | } | |
861 | else | |
862 | { | |
863 | input_line_pointer = ends + 8; | |
864 | } | |
865 | new_buf = xmalloc (100); | |
866 | new_length = 100; | |
867 | new_tmp = new_buf; | |
868 | ||
869 | scrub_string = s; | |
f8701a3f | 870 | scrub_last_string = ends; |
6efd877d KR |
871 | for (;;) |
872 | { | |
f8701a3f SC |
873 | int ch; |
874 | ||
6efd877d KR |
875 | ch = do_scrub_next_char (scrub_from_string, scrub_to_string); |
876 | if (ch == EOF) | |
877 | break; | |
878 | *new_tmp++ = ch; | |
879 | if (new_tmp == new_buf + new_length) | |
880 | { | |
881 | new_buf = xrealloc (new_buf, new_length + 100); | |
882 | new_tmp = new_buf + new_length; | |
883 | new_length += 100; | |
f8701a3f | 884 | } |
fecd2382 | 885 | } |
f8701a3f SC |
886 | |
887 | if (tmp_buf) | |
6efd877d KR |
888 | free (tmp_buf); |
889 | old_buffer = buffer; | |
890 | old_input = input_line_pointer; | |
891 | old_limit = buffer_limit; | |
892 | buffer = new_buf; | |
893 | input_line_pointer = new_buf; | |
894 | buffer_limit = new_tmp; | |
f8701a3f SC |
895 | continue; |
896 | } | |
897 | ||
6efd877d | 898 | HANDLE_CONDITIONAL_ASSEMBLY (); |
f8701a3f SC |
899 | |
900 | /* as_warn("Junk character %d.",c); Now done by ignore_rest */ | |
901 | input_line_pointer--; /* Report unknown char as ignored. */ | |
6efd877d KR |
902 | ignore_rest_of_line (); |
903 | } /* while (input_line_pointer<buffer_limit) */ | |
a2a5a4fa KR |
904 | |
905 | #ifdef md_after_pass_hook | |
906 | md_after_pass_hook (); | |
907 | #endif | |
908 | ||
6efd877d KR |
909 | if (old_buffer) |
910 | { | |
911 | bump_line_counters (); | |
912 | if (old_input != 0) | |
913 | { | |
914 | buffer = old_buffer; | |
915 | input_line_pointer = old_input; | |
916 | buffer_limit = old_limit; | |
f8701a3f SC |
917 | old_buffer = 0; |
918 | goto contin; | |
919 | } | |
920 | } | |
6efd877d | 921 | } /* while (more buffers to scan) */ |
f8701a3f | 922 | |
e28c40d7 ILT |
923 | quit: |
924 | input_scrub_close (); /* Close the input file */ | |
4075afe1 | 925 | } |
fecd2382 | 926 | |
6efd877d | 927 | void |
604633ae ILT |
928 | s_abort (ignore) |
929 | int ignore; | |
6efd877d KR |
930 | { |
931 | as_fatal (".abort detected. Abandoning ship."); | |
4075afe1 KR |
932 | } |
933 | ||
934 | /* Guts of .align directive. */ | |
935 | static void | |
936 | do_align (n, fill) | |
937 | int n; | |
938 | char *fill; | |
939 | { | |
940 | #ifdef md_do_align | |
941 | md_do_align (n, fill, just_record_alignment); | |
942 | #endif | |
943 | if (!fill) | |
944 | { | |
945 | /* @@ Fix this right for BFD! */ | |
946 | static char zero; | |
947 | static char nop_opcode = NOP_OPCODE; | |
948 | ||
949 | if (now_seg != data_section && now_seg != bss_section) | |
950 | { | |
951 | fill = &nop_opcode; | |
952 | } | |
953 | else | |
954 | { | |
955 | fill = &zero; | |
956 | } | |
957 | } | |
958 | /* Only make a frag if we HAVE to. . . */ | |
959 | if (n && !need_pass_2) | |
960 | frag_align (n, *fill); | |
961 | ||
c02fd8dc | 962 | #ifdef md_do_align |
4075afe1 | 963 | just_record_alignment: |
c02fd8dc ILT |
964 | #endif |
965 | ||
4075afe1 KR |
966 | record_alignment (now_seg, n); |
967 | } | |
fecd2382 RP |
968 | |
969 | /* For machines where ".align 4" means align to a 4 byte boundary. */ | |
6efd877d KR |
970 | void |
971 | s_align_bytes (arg) | |
972 | int arg; | |
fecd2382 | 973 | { |
6efd877d | 974 | register unsigned int temp; |
4075afe1 | 975 | char temp_fill; |
6efd877d KR |
976 | unsigned int i = 0; |
977 | unsigned long max_alignment = 1 << 15; | |
f8701a3f | 978 | |
58d4951d | 979 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
980 | temp = arg; /* Default value from pseudo-op table */ |
981 | else | |
982 | temp = get_absolute_expression (); | |
f8701a3f | 983 | |
6efd877d KR |
984 | if (temp > max_alignment) |
985 | { | |
986 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
f8701a3f SC |
987 | } |
988 | ||
4075afe1 KR |
989 | /* For the sparc, `.align (1<<n)' actually means `.align n' so we |
990 | have to convert it. */ | |
6efd877d KR |
991 | if (temp != 0) |
992 | { | |
993 | for (i = 0; (temp & 1) == 0; temp >>= 1, ++i) | |
994 | ; | |
f8701a3f | 995 | } |
6efd877d KR |
996 | if (temp != 1) |
997 | as_bad ("Alignment not a power of 2"); | |
f8701a3f | 998 | |
6efd877d KR |
999 | temp = i; |
1000 | if (*input_line_pointer == ',') | |
1001 | { | |
1002 | input_line_pointer++; | |
1003 | temp_fill = get_absolute_expression (); | |
4075afe1 | 1004 | do_align (temp, &temp_fill); |
f8701a3f | 1005 | } |
6efd877d | 1006 | else |
4075afe1 | 1007 | do_align (temp, (char *) 0); |
49864cfa | 1008 | |
6efd877d | 1009 | demand_empty_rest_of_line (); |
4075afe1 | 1010 | } |
fecd2382 RP |
1011 | |
1012 | /* For machines where ".align 4" means align to 2**4 boundary. */ | |
6efd877d | 1013 | void |
604633ae ILT |
1014 | s_align_ptwo (ignore) |
1015 | int ignore; | |
6efd877d KR |
1016 | { |
1017 | register int temp; | |
4075afe1 | 1018 | char temp_fill; |
6efd877d KR |
1019 | long max_alignment = 15; |
1020 | ||
1021 | temp = get_absolute_expression (); | |
1022 | if (temp > max_alignment) | |
1023 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
1024 | else if (temp < 0) | |
1025 | { | |
1026 | as_bad ("Alignment negative. 0 assumed."); | |
1027 | temp = 0; | |
1028 | } | |
1029 | if (*input_line_pointer == ',') | |
1030 | { | |
1031 | input_line_pointer++; | |
1032 | temp_fill = get_absolute_expression (); | |
4075afe1 | 1033 | do_align (temp, &temp_fill); |
6efd877d KR |
1034 | } |
1035 | else | |
4075afe1 | 1036 | do_align (temp, (char *) 0); |
6efd877d KR |
1037 | |
1038 | demand_empty_rest_of_line (); | |
4075afe1 | 1039 | } |
6efd877d KR |
1040 | |
1041 | void | |
604633ae ILT |
1042 | s_comm (ignore) |
1043 | int ignore; | |
6efd877d KR |
1044 | { |
1045 | register char *name; | |
1046 | register char c; | |
1047 | register char *p; | |
58d4951d | 1048 | offsetT temp; |
6efd877d KR |
1049 | register symbolS *symbolP; |
1050 | ||
1051 | name = input_line_pointer; | |
1052 | c = get_symbol_end (); | |
1053 | /* just after name is now '\0' */ | |
1054 | p = input_line_pointer; | |
1055 | *p = c; | |
1056 | SKIP_WHITESPACE (); | |
1057 | if (*input_line_pointer != ',') | |
1058 | { | |
1059 | as_bad ("Expected comma after symbol-name: rest of line ignored."); | |
1060 | ignore_rest_of_line (); | |
1061 | return; | |
1062 | } | |
1063 | input_line_pointer++; /* skip ',' */ | |
1064 | if ((temp = get_absolute_expression ()) < 0) | |
1065 | { | |
58d4951d | 1066 | as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp); |
6efd877d KR |
1067 | ignore_rest_of_line (); |
1068 | return; | |
1069 | } | |
1070 | *p = 0; | |
1071 | symbolP = symbol_find_or_make (name); | |
1072 | *p = c; | |
1073 | if (S_IS_DEFINED (symbolP)) | |
1074 | { | |
6ef37255 KR |
1075 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
1076 | S_GET_NAME (symbolP)); | |
6efd877d KR |
1077 | ignore_rest_of_line (); |
1078 | return; | |
1079 | } | |
1080 | if (S_GET_VALUE (symbolP)) | |
1081 | { | |
58d4951d ILT |
1082 | if (S_GET_VALUE (symbolP) != (valueT) temp) |
1083 | as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.", | |
6efd877d | 1084 | S_GET_NAME (symbolP), |
58d4951d ILT |
1085 | (long) S_GET_VALUE (symbolP), |
1086 | (long) temp); | |
6efd877d KR |
1087 | } |
1088 | else | |
1089 | { | |
58d4951d | 1090 | S_SET_VALUE (symbolP, (valueT) temp); |
6efd877d KR |
1091 | S_SET_EXTERNAL (symbolP); |
1092 | } | |
9471a360 | 1093 | #ifdef OBJ_VMS |
def66e24 DM |
1094 | { |
1095 | extern int flag_one; | |
1096 | if ( (!temp) || !flag_one) | |
1097 | S_GET_OTHER(symbolP) = const_flag; | |
1098 | } | |
9471a360 | 1099 | #endif /* not OBJ_VMS */ |
6efd877d KR |
1100 | know (symbolP->sy_frag == &zero_address_frag); |
1101 | demand_empty_rest_of_line (); | |
1102 | } /* s_comm() */ | |
fecd2382 | 1103 | |
1356d77d ILT |
1104 | /* The MRI COMMON pseudo-op. We handle this by creating a common |
1105 | symbol with the appropriate name. We make s_space do the right | |
1106 | thing by increasing the size. */ | |
1107 | ||
1108 | void | |
1109 | s_mri_common (small) | |
1110 | int small; | |
1111 | { | |
1112 | char *name; | |
1113 | char c; | |
1114 | char *alc = NULL; | |
1115 | symbolS *sym; | |
1116 | offsetT align; | |
1117 | ||
1118 | if (! flag_mri) | |
1119 | { | |
1120 | s_comm (0); | |
1121 | return; | |
1122 | } | |
1123 | ||
1124 | SKIP_WHITESPACE (); | |
1125 | ||
1126 | name = input_line_pointer; | |
1127 | if (! isdigit ((unsigned char) *name)) | |
1128 | c = get_symbol_end (); | |
1129 | else | |
1130 | { | |
1131 | do | |
1132 | { | |
1133 | ++input_line_pointer; | |
1134 | } | |
1135 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1136 | c = *input_line_pointer; | |
1137 | *input_line_pointer = '\0'; | |
1138 | ||
7e047ac2 | 1139 | if (line_label != NULL) |
1356d77d | 1140 | { |
7e047ac2 | 1141 | alc = (char *) xmalloc (strlen (S_GET_NAME (line_label)) |
1356d77d ILT |
1142 | + (input_line_pointer - name) |
1143 | + 1); | |
7e047ac2 | 1144 | sprintf (alc, "%s%s", name, S_GET_NAME (line_label)); |
1356d77d ILT |
1145 | name = alc; |
1146 | } | |
1147 | } | |
1148 | ||
1149 | sym = symbol_find_or_make (name); | |
1150 | *input_line_pointer = c; | |
1151 | if (alc != NULL) | |
1152 | free (alc); | |
1153 | ||
1154 | if (*input_line_pointer != ',') | |
1155 | align = 0; | |
1156 | else | |
1157 | { | |
1158 | ++input_line_pointer; | |
1159 | align = get_absolute_expression (); | |
1160 | } | |
1161 | ||
1162 | if (S_IS_DEFINED (sym)) | |
1163 | { | |
1164 | #if defined (S_IS_COMMON) || defined (BFD_ASSEMBLER) | |
1165 | if (! S_IS_COMMON (sym)) | |
1166 | #endif | |
1167 | { | |
1168 | as_bad ("attempt to re-define symbol `%s'", S_GET_NAME (sym)); | |
1169 | ignore_rest_of_line (); | |
1170 | return; | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | S_SET_EXTERNAL (sym); | |
1175 | mri_common_symbol = sym; | |
1176 | ||
1177 | #ifdef S_SET_ALIGN | |
1178 | if (align != 0) | |
1179 | S_SET_ALIGN (sym, align); | |
1180 | #endif | |
1181 | ||
7e047ac2 | 1182 | if (line_label != NULL) |
1356d77d | 1183 | { |
7e047ac2 ILT |
1184 | line_label->sy_value.X_op = O_symbol; |
1185 | line_label->sy_value.X_add_symbol = sym; | |
1186 | line_label->sy_value.X_add_number = S_GET_VALUE (sym); | |
1187 | line_label->sy_frag = &zero_address_frag; | |
1188 | S_SET_SEGMENT (line_label, expr_section); | |
1356d77d ILT |
1189 | } |
1190 | ||
1191 | /* FIXME: We just ignore the small argument, which distinguishes | |
1192 | COMMON and COMMON.S. I don't know what we can do about it. */ | |
1193 | ||
1194 | /* Ignore the type and hptype. */ | |
1195 | if (*input_line_pointer == ',') | |
1196 | input_line_pointer += 2; | |
1197 | if (*input_line_pointer == ',') | |
1198 | input_line_pointer += 2; | |
1199 | demand_empty_rest_of_line (); | |
1200 | } | |
1201 | ||
fecd2382 | 1202 | void |
604633ae ILT |
1203 | s_data (ignore) |
1204 | int ignore; | |
fecd2382 | 1205 | { |
ffffc8fb | 1206 | segT section; |
6efd877d | 1207 | register int temp; |
f8701a3f | 1208 | |
6efd877d | 1209 | temp = get_absolute_expression (); |
def66e24 | 1210 | if (flag_readonly_data_in_text) |
ffffc8fb ILT |
1211 | { |
1212 | section = text_section; | |
1213 | temp += 1000; | |
1214 | } | |
1215 | else | |
1216 | section = data_section; | |
1217 | ||
ffffc8fb | 1218 | subseg_set (section, (subsegT) temp); |
f8701a3f | 1219 | |
9471a360 | 1220 | #ifdef OBJ_VMS |
6efd877d | 1221 | const_flag = 0; |
fecd2382 | 1222 | #endif |
6efd877d | 1223 | demand_empty_rest_of_line (); |
fecd2382 RP |
1224 | } |
1225 | ||
9a7d824a ILT |
1226 | /* Handle the .appfile pseudo-op. This is automatically generated by |
1227 | do_scrub_next_char when a preprocessor # line comment is seen with | |
1228 | a file name. This default definition may be overridden by the | |
1229 | object or CPU specific pseudo-ops. This function is also the | |
1230 | default definition for .file; the APPFILE argument is 1 for | |
1231 | .appfile, 0 for .file. */ | |
1232 | ||
6efd877d | 1233 | void |
9a7d824a ILT |
1234 | s_app_file (appfile) |
1235 | int appfile; | |
6efd877d KR |
1236 | { |
1237 | register char *s; | |
1238 | int length; | |
f8701a3f | 1239 | |
6efd877d KR |
1240 | /* Some assemblers tolerate immediately following '"' */ |
1241 | if ((s = demand_copy_string (&length)) != 0) | |
1242 | { | |
9a7d824a ILT |
1243 | /* If this is a fake .appfile, a fake newline was inserted into |
1244 | the buffer. Passing -2 to new_logical_line tells it to | |
1245 | account for it. */ | |
1246 | new_logical_line (s, appfile ? -2 : -1); | |
6efd877d | 1247 | demand_empty_rest_of_line (); |
9a7d824a ILT |
1248 | #ifdef LISTING |
1249 | if (listing) | |
1250 | listing_source_file (s); | |
1251 | #endif | |
6efd877d | 1252 | } |
2209b19c KR |
1253 | #ifdef obj_app_file |
1254 | obj_app_file (s); | |
40324362 KR |
1255 | #endif |
1256 | } | |
fecd2382 | 1257 | |
9a7d824a ILT |
1258 | /* Handle the .appline pseudo-op. This is automatically generated by |
1259 | do_scrub_next_char when a preprocessor # line comment is seen. | |
1260 | This default definition may be overridden by the object or CPU | |
1261 | specific pseudo-ops. */ | |
1262 | ||
1263 | void | |
604633ae ILT |
1264 | s_app_line (ignore) |
1265 | int ignore; | |
9a7d824a ILT |
1266 | { |
1267 | int l; | |
1268 | ||
1269 | /* The given number is that of the next line. */ | |
1270 | l = get_absolute_expression () - 1; | |
931a8fab KR |
1271 | if (l < 0) |
1272 | /* Some of the back ends can't deal with non-positive line numbers. | |
1273 | Besides, it's silly. */ | |
1274 | as_warn ("Line numbers must be positive; line number %d rejected.", l+1); | |
1275 | else | |
1276 | { | |
1277 | new_logical_line ((char *) NULL, l); | |
9a7d824a | 1278 | #ifdef LISTING |
931a8fab KR |
1279 | if (listing) |
1280 | listing_source_line (l); | |
9a7d824a | 1281 | #endif |
931a8fab | 1282 | } |
9a7d824a ILT |
1283 | demand_empty_rest_of_line (); |
1284 | } | |
1285 | ||
e28c40d7 ILT |
1286 | /* Handle the .end pseudo-op. Actually, the real work is done in |
1287 | read_a_source_file. */ | |
1288 | ||
1289 | void | |
1290 | s_end (ignore) | |
1291 | int ignore; | |
1292 | { | |
1293 | if (flag_mri) | |
1294 | { | |
1295 | /* The MRI assembler permits the start symbol to follow .end, | |
1296 | but we don't support that. */ | |
1297 | SKIP_WHITESPACE (); | |
1298 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1299 | as_warn ("start address not supported"); | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | /* Handle the MRI fail pseudo-op. */ | |
1304 | ||
1305 | void | |
1306 | s_fail (ignore) | |
1307 | int ignore; | |
1308 | { | |
1309 | offsetT temp; | |
1310 | ||
1311 | temp = get_absolute_expression (); | |
1312 | if (temp >= 500) | |
1313 | as_warn (".fail %ld encountered", (long) temp); | |
1314 | else | |
1315 | as_bad (".fail %ld encountered", (long) temp); | |
1316 | demand_empty_rest_of_line (); | |
1317 | } | |
1318 | ||
6efd877d | 1319 | void |
604633ae ILT |
1320 | s_fill (ignore) |
1321 | int ignore; | |
6efd877d KR |
1322 | { |
1323 | long temp_repeat = 0; | |
1324 | long temp_size = 1; | |
1325 | register long temp_fill = 0; | |
1326 | char *p; | |
f8701a3f | 1327 | |
7c2d4011 | 1328 | |
6efd877d KR |
1329 | temp_repeat = get_absolute_expression (); |
1330 | if (*input_line_pointer == ',') | |
1331 | { | |
1332 | input_line_pointer++; | |
1333 | temp_size = get_absolute_expression (); | |
1334 | if (*input_line_pointer == ',') | |
7c2d4011 SC |
1335 | { |
1336 | input_line_pointer++; | |
6efd877d | 1337 | temp_fill = get_absolute_expression (); |
fecd2382 | 1338 | } |
6efd877d | 1339 | } |
c8863a58 | 1340 | /* This is to be compatible with BSD 4.2 AS, not for any rational reason. */ |
fecd2382 | 1341 | #define BSD_FILL_SIZE_CROCK_8 (8) |
6efd877d KR |
1342 | if (temp_size > BSD_FILL_SIZE_CROCK_8) |
1343 | { | |
1344 | as_warn (".fill size clamped to %d.", BSD_FILL_SIZE_CROCK_8); | |
1345 | temp_size = BSD_FILL_SIZE_CROCK_8; | |
1346 | } | |
1347 | if (temp_size < 0) | |
1348 | { | |
1349 | as_warn ("Size negative: .fill ignored."); | |
1350 | temp_size = 0; | |
1351 | } | |
1352 | else if (temp_repeat <= 0) | |
1353 | { | |
1354 | as_warn ("Repeat < 0, .fill ignored"); | |
1355 | temp_size = 0; | |
1356 | } | |
7fd3560a | 1357 | |
6efd877d KR |
1358 | if (temp_size && !need_pass_2) |
1359 | { | |
1360 | p = frag_var (rs_fill, (int) temp_size, (int) temp_size, (relax_substateT) 0, (symbolS *) 0, temp_repeat, (char *) 0); | |
604633ae | 1361 | memset (p, 0, (unsigned int) temp_size); |
c8863a58 KR |
1362 | /* The magic number BSD_FILL_SIZE_CROCK_4 is from BSD 4.2 VAX |
1363 | * flavoured AS. The following bizzare behaviour is to be | |
1364 | * compatible with above. I guess they tried to take up to 8 | |
1365 | * bytes from a 4-byte expression and they forgot to sign | |
1366 | * extend. Un*x Sux. */ | |
fecd2382 | 1367 | #define BSD_FILL_SIZE_CROCK_4 (4) |
604633ae | 1368 | md_number_to_chars (p, (valueT) temp_fill, |
c8863a58 KR |
1369 | (temp_size > BSD_FILL_SIZE_CROCK_4 |
1370 | ? BSD_FILL_SIZE_CROCK_4 | |
1371 | : (int) temp_size)); | |
1372 | /* Note: .fill (),0 emits no frag (since we are asked to .fill 0 bytes) | |
1373 | * but emits no error message because it seems a legal thing to do. | |
1374 | * It is a degenerate case of .fill but could be emitted by a compiler. | |
1375 | */ | |
6efd877d | 1376 | } |
6efd877d | 1377 | demand_empty_rest_of_line (); |
f8701a3f SC |
1378 | } |
1379 | ||
6efd877d | 1380 | void |
604633ae ILT |
1381 | s_globl (ignore) |
1382 | int ignore; | |
6efd877d | 1383 | { |
40324362 KR |
1384 | char *name; |
1385 | int c; | |
1386 | symbolS *symbolP; | |
fecd2382 | 1387 | |
6efd877d KR |
1388 | do |
1389 | { | |
1390 | name = input_line_pointer; | |
1391 | c = get_symbol_end (); | |
1392 | symbolP = symbol_find_or_make (name); | |
1393 | *input_line_pointer = c; | |
1394 | SKIP_WHITESPACE (); | |
1395 | S_SET_EXTERNAL (symbolP); | |
1396 | if (c == ',') | |
1397 | { | |
1398 | input_line_pointer++; | |
1399 | SKIP_WHITESPACE (); | |
1400 | if (*input_line_pointer == '\n') | |
1401 | c = '\n'; | |
1402 | } | |
1403 | } | |
1404 | while (c == ','); | |
1405 | demand_empty_rest_of_line (); | |
40324362 | 1406 | } |
6efd877d | 1407 | |
7e047ac2 ILT |
1408 | /* Handle the MRI IRP and IRPC pseudo-ops. */ |
1409 | ||
1410 | void | |
1411 | s_irp (irpc) | |
1412 | int irpc; | |
1413 | { | |
1414 | char *file; | |
1415 | unsigned int line; | |
1416 | sb s; | |
1417 | const char *err; | |
1418 | sb out; | |
1419 | ||
1420 | as_where (&file, &line); | |
1421 | ||
1422 | sb_new (&s); | |
1423 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1424 | sb_add_char (&s, *input_line_pointer++); | |
1425 | ||
1426 | sb_new (&out); | |
1427 | ||
1428 | err = expand_irp (irpc, 0, &s, &out, get_line_sb, '\0'); | |
1429 | if (err != NULL) | |
1430 | as_bad_where (file, line, "%s", err); | |
1431 | ||
1432 | sb_kill (&s); | |
1433 | ||
1434 | input_scrub_include_sb (&out, input_line_pointer); | |
1435 | sb_kill (&out); | |
1436 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1437 | } | |
1438 | ||
6efd877d KR |
1439 | void |
1440 | s_lcomm (needs_align) | |
c8863a58 KR |
1441 | /* 1 if this was a ".bss" directive, which may require a 3rd argument |
1442 | (alignment); 0 if it was an ".lcomm" (2 args only) */ | |
1443 | int needs_align; | |
fecd2382 | 1444 | { |
6efd877d KR |
1445 | register char *name; |
1446 | register char c; | |
1447 | register char *p; | |
1448 | register int temp; | |
1449 | register symbolS *symbolP; | |
9a7d824a ILT |
1450 | segT current_seg = now_seg; |
1451 | subsegT current_subseg = now_subseg; | |
6efd877d KR |
1452 | const int max_alignment = 15; |
1453 | int align = 0; | |
9a7d824a | 1454 | segT bss_seg = bss_section; |
6efd877d KR |
1455 | |
1456 | name = input_line_pointer; | |
1457 | c = get_symbol_end (); | |
1458 | p = input_line_pointer; | |
1459 | *p = c; | |
1460 | SKIP_WHITESPACE (); | |
46b81190 ILT |
1461 | |
1462 | /* Accept an optional comma after the name. The comma used to be | |
1463 | required, but Irix 5 cc does not generate it. */ | |
1464 | if (*input_line_pointer == ',') | |
6efd877d | 1465 | { |
46b81190 ILT |
1466 | ++input_line_pointer; |
1467 | SKIP_WHITESPACE (); | |
6efd877d | 1468 | } |
f8701a3f | 1469 | |
6efd877d KR |
1470 | if (*input_line_pointer == '\n') |
1471 | { | |
1472 | as_bad ("Missing size expression"); | |
1473 | return; | |
1474 | } | |
f8701a3f | 1475 | |
6efd877d KR |
1476 | if ((temp = get_absolute_expression ()) < 0) |
1477 | { | |
1478 | as_warn ("BSS length (%d.) <0! Ignored.", temp); | |
1479 | ignore_rest_of_line (); | |
1480 | return; | |
1481 | } | |
f8701a3f | 1482 | |
2ef7731d | 1483 | #if defined (TC_MIPS) || defined (TC_ALPHA) |
a2a5a4fa KR |
1484 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour |
1485 | || OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
46b81190 | 1486 | { |
a2a5a4fa KR |
1487 | /* For MIPS and Alpha ECOFF or ELF, small objects are put in .sbss. */ |
1488 | if (temp <= bfd_get_gp_size (stdoutput)) | |
1489 | { | |
1490 | bss_seg = subseg_new (".sbss", 1); | |
1491 | seg_info (bss_seg)->bss = 1; | |
1492 | } | |
46b81190 | 1493 | } |
9a7d824a | 1494 | #endif |
ede7bc1c SC |
1495 | if (!needs_align) |
1496 | { | |
1497 | /* FIXME. This needs to be machine independent. */ | |
9d90491e ILT |
1498 | if (temp >= 8) |
1499 | align = 3; | |
1500 | else if (temp >= 4) | |
ede7bc1c SC |
1501 | align = 2; |
1502 | else if (temp >= 2) | |
1503 | align = 1; | |
1504 | else | |
c71a604a | 1505 | align = 0; |
ede7bc1c SC |
1506 | |
1507 | record_alignment(bss_seg, align); | |
1508 | } | |
9a7d824a | 1509 | |
6efd877d KR |
1510 | if (needs_align) |
1511 | { | |
1512 | align = 0; | |
1513 | SKIP_WHITESPACE (); | |
1514 | if (*input_line_pointer != ',') | |
1515 | { | |
1516 | as_bad ("Expected comma after size"); | |
1517 | ignore_rest_of_line (); | |
1518 | return; | |
1519 | } | |
1520 | input_line_pointer++; | |
1521 | SKIP_WHITESPACE (); | |
1522 | if (*input_line_pointer == '\n') | |
1523 | { | |
1524 | as_bad ("Missing alignment"); | |
1525 | return; | |
1526 | } | |
1527 | align = get_absolute_expression (); | |
1528 | if (align > max_alignment) | |
1529 | { | |
1530 | align = max_alignment; | |
1531 | as_warn ("Alignment too large: %d. assumed.", align); | |
1532 | } | |
1533 | else if (align < 0) | |
1534 | { | |
1535 | align = 0; | |
1536 | as_warn ("Alignment negative. 0 assumed."); | |
1537 | } | |
9a7d824a | 1538 | record_alignment (bss_seg, align); |
6efd877d | 1539 | } /* if needs align */ |
4075afe1 KR |
1540 | else |
1541 | { | |
1542 | /* Assume some objects may require alignment on some systems. */ | |
1543 | #ifdef TC_ALPHA | |
1544 | if (temp > 1) | |
1545 | { | |
1546 | align = ffs (temp) - 1; | |
1547 | if (temp % (1 << align)) | |
1548 | abort (); | |
1549 | } | |
1550 | #endif | |
1551 | } | |
f8701a3f | 1552 | |
6efd877d KR |
1553 | *p = 0; |
1554 | symbolP = symbol_find_or_make (name); | |
1555 | *p = c; | |
f8701a3f | 1556 | |
6efd877d | 1557 | if ( |
fecd2382 | 1558 | #if defined(OBJ_AOUT) | defined(OBJ_BOUT) |
6efd877d KR |
1559 | S_GET_OTHER (symbolP) == 0 && |
1560 | S_GET_DESC (symbolP) == 0 && | |
fecd2382 | 1561 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
9a7d824a | 1562 | (S_GET_SEGMENT (symbolP) == bss_seg |
6efd877d KR |
1563 | || (!S_IS_DEFINED (symbolP) && S_GET_VALUE (symbolP) == 0))) |
1564 | { | |
604633ae | 1565 | char *pfrag; |
85825401 | 1566 | |
9a7d824a | 1567 | subseg_set (bss_seg, 1); |
85825401 ILT |
1568 | |
1569 | if (align) | |
1570 | frag_align (align, 0); | |
1571 | /* detach from old frag */ | |
9a7d824a | 1572 | if (S_GET_SEGMENT (symbolP) == bss_seg) |
85825401 ILT |
1573 | symbolP->sy_frag->fr_symbol = NULL; |
1574 | ||
1575 | symbolP->sy_frag = frag_now; | |
604633ae ILT |
1576 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT)0, symbolP, |
1577 | temp, (char *)0); | |
1578 | *pfrag = 0; | |
f8701a3f | 1579 | |
9a7d824a | 1580 | S_SET_SEGMENT (symbolP, bss_seg); |
85825401 | 1581 | |
fecd2382 | 1582 | #ifdef OBJ_COFF |
6efd877d | 1583 | /* The symbol may already have been created with a preceding |
c8863a58 KR |
1584 | ".globl" directive -- be careful not to step on storage class |
1585 | in that case. Otherwise, set it to static. */ | |
6efd877d KR |
1586 | if (S_GET_STORAGE_CLASS (symbolP) != C_EXT) |
1587 | { | |
1588 | S_SET_STORAGE_CLASS (symbolP, C_STAT); | |
fecd2382 | 1589 | } |
6efd877d | 1590 | #endif /* OBJ_COFF */ |
6efd877d KR |
1591 | } |
1592 | else | |
6ef37255 KR |
1593 | as_bad ("Ignoring attempt to re-define symbol `%s'.", |
1594 | S_GET_NAME (symbolP)); | |
f8701a3f | 1595 | |
9a7d824a | 1596 | subseg_set (current_seg, current_subseg); |
9a7d824a ILT |
1597 | |
1598 | demand_empty_rest_of_line (); | |
6efd877d | 1599 | } /* s_lcomm() */ |
fecd2382 | 1600 | |
6efd877d | 1601 | void |
604633ae ILT |
1602 | s_lsym (ignore) |
1603 | int ignore; | |
6efd877d KR |
1604 | { |
1605 | register char *name; | |
1606 | register char c; | |
1607 | register char *p; | |
6efd877d KR |
1608 | expressionS exp; |
1609 | register symbolS *symbolP; | |
1610 | ||
1611 | /* we permit ANY defined expression: BSD4.2 demands constants */ | |
1612 | name = input_line_pointer; | |
1613 | c = get_symbol_end (); | |
1614 | p = input_line_pointer; | |
1615 | *p = c; | |
1616 | SKIP_WHITESPACE (); | |
1617 | if (*input_line_pointer != ',') | |
1618 | { | |
1619 | *p = 0; | |
1620 | as_bad ("Expected comma after name \"%s\"", name); | |
1621 | *p = c; | |
1622 | ignore_rest_of_line (); | |
1623 | return; | |
1624 | } | |
1625 | input_line_pointer++; | |
b31f2abb KR |
1626 | expression (&exp); |
1627 | if (exp.X_op != O_constant | |
1628 | && exp.X_op != O_register) | |
1629 | { | |
1630 | as_bad ("bad expression"); | |
1631 | ignore_rest_of_line (); | |
1632 | return; | |
1633 | } | |
6efd877d KR |
1634 | *p = 0; |
1635 | symbolP = symbol_find_or_make (name); | |
f8701a3f | 1636 | |
c8863a58 KR |
1637 | /* FIXME-SOON I pulled a (&& symbolP->sy_other == 0 && |
1638 | symbolP->sy_desc == 0) out of this test because coff doesn't have | |
1639 | those fields, and I can't see when they'd ever be tripped. I | |
1640 | don't think I understand why they were here so I may have | |
1641 | introduced a bug. As recently as 1.37 didn't have this test | |
1642 | anyway. xoxorich. */ | |
f8701a3f | 1643 | |
9471a360 | 1644 | if (S_GET_SEGMENT (symbolP) == undefined_section |
6efd877d KR |
1645 | && S_GET_VALUE (symbolP) == 0) |
1646 | { | |
c8863a58 KR |
1647 | /* The name might be an undefined .global symbol; be sure to |
1648 | keep the "external" bit. */ | |
b31f2abb KR |
1649 | S_SET_SEGMENT (symbolP, |
1650 | (exp.X_op == O_constant | |
1651 | ? absolute_section | |
1652 | : reg_section)); | |
1653 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); | |
6efd877d KR |
1654 | } |
1655 | else | |
1656 | { | |
1657 | as_bad ("Symbol %s already defined", name); | |
1658 | } | |
1659 | *p = c; | |
1660 | demand_empty_rest_of_line (); | |
1661 | } /* s_lsym() */ | |
1662 | ||
7e047ac2 ILT |
1663 | /* Read a line into an sb. */ |
1664 | ||
1665 | static int | |
1666 | get_line_sb (line) | |
1667 | sb *line; | |
1668 | { | |
1669 | if (input_line_pointer >= buffer_limit) | |
1670 | { | |
1671 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1672 | if (buffer_limit == 0) | |
1673 | return 0; | |
1674 | } | |
1675 | ||
1676 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1677 | sb_add_char (line, *input_line_pointer++); | |
1678 | while (is_end_of_line[(unsigned char) *input_line_pointer]) | |
1679 | { | |
1680 | if (*input_line_pointer == '\n') | |
1681 | { | |
1682 | bump_line_counters (); | |
1683 | LISTING_NEWLINE (); | |
1684 | } | |
1685 | ++input_line_pointer; | |
1686 | } | |
1687 | return 1; | |
1688 | } | |
1689 | ||
1690 | /* Define a macro. This is an interface to macro.c, which is shared | |
1691 | between gas and gasp. */ | |
1692 | ||
1693 | void | |
1694 | s_macro (ignore) | |
1695 | int ignore; | |
1696 | { | |
1697 | char *file; | |
1698 | unsigned int line; | |
1699 | sb s; | |
1700 | sb label; | |
1701 | const char *err; | |
1702 | ||
1703 | as_where (&file, &line); | |
1704 | ||
1705 | sb_new (&s); | |
1706 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1707 | sb_add_char (&s, *input_line_pointer++); | |
1708 | ||
1709 | sb_new (&label); | |
1710 | if (line_label != NULL) | |
1711 | sb_add_string (&label, S_GET_NAME (line_label)); | |
1712 | ||
1713 | demand_empty_rest_of_line (); | |
1714 | ||
1715 | err = define_macro (0, &s, &label, get_line_sb); | |
1716 | if (err != NULL) | |
1717 | as_bad_where (file, line, "%s", err); | |
1718 | else | |
1719 | { | |
1720 | if (line_label != NULL) | |
1721 | { | |
1722 | S_SET_SEGMENT (line_label, undefined_section); | |
1723 | S_SET_VALUE (line_label, 0); | |
1724 | line_label->sy_frag = &zero_address_frag; | |
1725 | } | |
1726 | } | |
1727 | ||
1728 | sb_kill (&s); | |
1729 | } | |
1730 | ||
1731 | /* Handle the .mexit pseudo-op, which immediately exits a macro | |
1732 | expansion. */ | |
1733 | ||
1734 | void | |
1735 | s_mexit (ignore) | |
1736 | int ignore; | |
1737 | { | |
1738 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1739 | } | |
1740 | ||
e28c40d7 ILT |
1741 | /* Handle changing the location counter. */ |
1742 | ||
1743 | static void | |
1744 | do_org (segment, exp, fill) | |
1745 | segT segment; | |
1746 | expressionS *exp; | |
1747 | int fill; | |
1748 | { | |
1749 | if (segment != now_seg && segment != absolute_section) | |
1750 | as_bad ("invalid segment \"%s\"; segment \"%s\" assumed", | |
1751 | segment_name (segment), segment_name (now_seg)); | |
1752 | ||
1753 | if (now_seg == absolute_section) | |
1754 | { | |
1755 | if (fill != 0) | |
1756 | as_warn ("ignoring fill value in absolute section"); | |
1757 | if (exp->X_op != O_constant) | |
1758 | { | |
1759 | as_bad ("only constant offsets supported in absolute section"); | |
1760 | exp->X_add_number = 0; | |
1761 | } | |
1762 | abs_section_offset = exp->X_add_number; | |
1763 | } | |
1764 | else | |
1765 | { | |
1766 | char *p; | |
1767 | ||
1768 | p = frag_var (rs_org, 1, 1, (relax_substateT) 0, exp->X_add_symbol, | |
1769 | exp->X_add_number, (char *) NULL); | |
1770 | *p = fill; | |
1771 | } | |
1772 | } | |
1773 | ||
6efd877d | 1774 | void |
604633ae ILT |
1775 | s_org (ignore) |
1776 | int ignore; | |
6efd877d KR |
1777 | { |
1778 | register segT segment; | |
1779 | expressionS exp; | |
1780 | register long temp_fill; | |
e28c40d7 | 1781 | |
69e077f3 ILT |
1782 | /* The MRI assembler has a different meaning for .org. It means to |
1783 | create an absolute section at a given address. We can't support | |
1784 | that--use a linker script instead. */ | |
1785 | if (flag_mri) | |
1786 | { | |
1787 | as_bad ("MRI style ORG pseudo-op not supported"); | |
1788 | ignore_rest_of_line (); | |
1789 | return; | |
1790 | } | |
1791 | ||
9471a360 KR |
1792 | /* Don't believe the documentation of BSD 4.2 AS. There is no such |
1793 | thing as a sub-segment-relative origin. Any absolute origin is | |
1794 | given a warning, then assumed to be segment-relative. Any | |
1795 | segmented origin expression ("foo+42") had better be in the right | |
1796 | segment or the .org is ignored. | |
1797 | ||
1798 | BSD 4.2 AS warns if you try to .org backwards. We cannot because | |
1799 | we never know sub-segment sizes when we are reading code. BSD | |
1800 | will crash trying to emit negative numbers of filler bytes in | |
1801 | certain .orgs. We don't crash, but see as-write for that code. | |
1802 | ||
1803 | Don't make frag if need_pass_2==1. */ | |
6efd877d KR |
1804 | segment = get_known_segmented_expression (&exp); |
1805 | if (*input_line_pointer == ',') | |
1806 | { | |
1807 | input_line_pointer++; | |
1808 | temp_fill = get_absolute_expression (); | |
1809 | } | |
1810 | else | |
1811 | temp_fill = 0; | |
e28c40d7 | 1812 | |
6efd877d | 1813 | if (!need_pass_2) |
e28c40d7 ILT |
1814 | do_org (segment, &exp, temp_fill); |
1815 | ||
6efd877d KR |
1816 | demand_empty_rest_of_line (); |
1817 | } /* s_org() */ | |
1818 | ||
e14994d9 ILT |
1819 | /* Handle parsing for the MRI SECT/SECTION pseudo-op. This should be |
1820 | called by the obj-format routine which handles section changing | |
1821 | when in MRI mode. It will create a new section, and return it. It | |
1822 | will set *TYPE to the section type: one of '\0' (unspecified), 'C' | |
1823 | (code), 'D' (data), 'M' (mixed), or 'R' (romable). If | |
1824 | BFD_ASSEMBLER is defined, the flags will be set in the section. */ | |
1825 | ||
1826 | void | |
1827 | s_mri_sect (type) | |
1828 | char *type; | |
1829 | { | |
1830 | char *name; | |
1831 | char c; | |
1832 | segT seg; | |
1833 | ||
1834 | SKIP_WHITESPACE (); | |
1835 | ||
1836 | name = input_line_pointer; | |
1837 | if (! isdigit ((unsigned char) *name)) | |
1838 | c = get_symbol_end (); | |
1839 | else | |
1840 | { | |
1841 | do | |
1842 | { | |
1843 | ++input_line_pointer; | |
1844 | } | |
1845 | while (isdigit ((unsigned char) *input_line_pointer)); | |
1846 | c = *input_line_pointer; | |
1847 | *input_line_pointer = '\0'; | |
1848 | } | |
1849 | ||
1850 | name = strdup (name); | |
1851 | if (name == NULL) | |
1852 | as_fatal ("virtual memory exhausted"); | |
1853 | ||
1854 | *input_line_pointer = c; | |
1855 | ||
1856 | seg = subseg_new (name, 0); | |
1857 | ||
1858 | if (*input_line_pointer == ',') | |
1859 | { | |
1860 | int align; | |
1861 | ||
1862 | ++input_line_pointer; | |
1863 | align = get_absolute_expression (); | |
1864 | record_alignment (seg, align); | |
1865 | } | |
1866 | ||
1867 | *type = '\0'; | |
1868 | if (*input_line_pointer == ',') | |
1869 | { | |
1870 | c = *++input_line_pointer; | |
1871 | c = toupper ((unsigned char) c); | |
1872 | if (c == 'C' || c == 'D' || c == 'M' || c == 'R') | |
1873 | *type = c; | |
1874 | else | |
1875 | as_bad ("unrecognized section type"); | |
1876 | ++input_line_pointer; | |
1877 | ||
1878 | #ifdef BFD_ASSEMBLER | |
1879 | { | |
1880 | flagword flags; | |
1881 | ||
1882 | flags = SEC_NO_FLAGS; | |
ca232972 | 1883 | if (*type == 'C') |
e14994d9 | 1884 | flags = SEC_CODE; |
ca232972 | 1885 | else if (*type == 'D') |
e14994d9 | 1886 | flags = SEC_DATA; |
ca232972 | 1887 | else if (*type == 'R') |
e14994d9 ILT |
1888 | flags = SEC_ROM; |
1889 | if (flags != SEC_NO_FLAGS) | |
1890 | { | |
1891 | if (! bfd_set_section_flags (stdoutput, seg, flags)) | |
1892 | as_warn ("error setting flags for \"%s\": %s", | |
ca232972 | 1893 | bfd_section_name (stdoutput, seg), |
e14994d9 ILT |
1894 | bfd_errmsg (bfd_get_error ())); |
1895 | } | |
1896 | } | |
1897 | #endif | |
1898 | } | |
1899 | ||
1900 | /* Ignore the HP type. */ | |
1901 | if (*input_line_pointer == ',') | |
1902 | input_line_pointer += 2; | |
1903 | ||
1904 | demand_empty_rest_of_line (); | |
1905 | } | |
1906 | ||
7e047ac2 ILT |
1907 | /* Handle the .rept pseudo-op. */ |
1908 | ||
1909 | void | |
1910 | s_rept (ignore) | |
1911 | int ignore; | |
1912 | { | |
1913 | int count; | |
1914 | sb one; | |
1915 | sb many; | |
1916 | ||
1917 | count = get_absolute_expression (); | |
1918 | ||
1919 | sb_new (&one); | |
1920 | if (! buffer_and_nest ("REPT", "ENDR", &one, get_line_sb)) | |
1921 | { | |
1922 | as_bad ("rept without endr"); | |
1923 | return; | |
1924 | } | |
1925 | ||
1926 | sb_new (&many); | |
1927 | while (count-- > 0) | |
1928 | sb_add_sb (&many, &one); | |
1929 | ||
1930 | sb_kill (&one); | |
1931 | ||
1932 | input_scrub_include_sb (&many, input_line_pointer); | |
1933 | sb_kill (&many); | |
1934 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
1935 | } | |
1936 | ||
6efd877d | 1937 | void |
604633ae ILT |
1938 | s_set (ignore) |
1939 | int ignore; | |
6efd877d KR |
1940 | { |
1941 | register char *name; | |
1942 | register char delim; | |
1943 | register char *end_name; | |
1944 | register symbolS *symbolP; | |
1945 | ||
1946 | /* | |
c8863a58 KR |
1947 | * Especial apologies for the random logic: |
1948 | * this just grew, and could be parsed much more simply! | |
1949 | * Dean in haste. | |
1950 | */ | |
6efd877d KR |
1951 | name = input_line_pointer; |
1952 | delim = get_symbol_end (); | |
1953 | end_name = input_line_pointer; | |
1954 | *end_name = delim; | |
1955 | SKIP_WHITESPACE (); | |
f8701a3f | 1956 | |
6efd877d KR |
1957 | if (*input_line_pointer != ',') |
1958 | { | |
1959 | *end_name = 0; | |
1960 | as_bad ("Expected comma after name \"%s\"", name); | |
1961 | *end_name = delim; | |
1962 | ignore_rest_of_line (); | |
1963 | return; | |
1964 | } | |
1965 | ||
1966 | input_line_pointer++; | |
1967 | *end_name = 0; | |
1968 | ||
1969 | if (name[0] == '.' && name[1] == '\0') | |
1970 | { | |
1971 | /* Turn '. = mumble' into a .org mumble */ | |
1972 | register segT segment; | |
1973 | expressionS exp; | |
6efd877d KR |
1974 | |
1975 | segment = get_known_segmented_expression (&exp); | |
f8701a3f | 1976 | |
6efd877d | 1977 | if (!need_pass_2) |
e28c40d7 | 1978 | do_org (segment, &exp, 0); |
6efd877d KR |
1979 | |
1980 | *end_name = delim; | |
1981 | return; | |
1982 | } | |
1983 | ||
1984 | if ((symbolP = symbol_find (name)) == NULL | |
1985 | && (symbolP = md_undefined_symbol (name)) == NULL) | |
1986 | { | |
9471a360 | 1987 | symbolP = symbol_new (name, undefined_section, 0, &zero_address_frag); |
fecd2382 | 1988 | #ifdef OBJ_COFF |
6efd877d KR |
1989 | /* "set" symbols are local unless otherwise specified. */ |
1990 | SF_SET_LOCAL (symbolP); | |
fecd2382 | 1991 | #endif /* OBJ_COFF */ |
f8701a3f | 1992 | |
6efd877d | 1993 | } /* make a new symbol */ |
f8701a3f | 1994 | |
6efd877d | 1995 | symbol_table_insert (symbolP); |
f8701a3f | 1996 | |
6efd877d KR |
1997 | *end_name = delim; |
1998 | pseudo_set (symbolP); | |
1999 | demand_empty_rest_of_line (); | |
2000 | } /* s_set() */ | |
fecd2382 | 2001 | |
6efd877d KR |
2002 | void |
2003 | s_space (mult) | |
2004 | int mult; | |
b53ccaac | 2005 | { |
cd3b81bd | 2006 | expressionS exp; |
931a8fab | 2007 | long temp_fill; |
cd3b81bd | 2008 | char *p = 0; |
6efd877d | 2009 | |
a2a5a4fa KR |
2010 | #ifdef md_flush_pending_output |
2011 | md_flush_pending_output (); | |
2012 | #endif | |
2013 | ||
6efd877d | 2014 | /* Just like .fill, but temp_size = 1 */ |
cd3b81bd | 2015 | expression (&exp); |
931a8fab | 2016 | if (exp.X_op == O_constant) |
6efd877d | 2017 | { |
cd3b81bd KR |
2018 | long repeat; |
2019 | ||
2020 | repeat = exp.X_add_number; | |
2021 | if (mult) | |
2022 | repeat *= mult; | |
2023 | if (repeat <= 0) | |
2024 | { | |
4026c122 ILT |
2025 | if (! flag_mri || repeat < 0) |
2026 | as_warn (".space repeat count is %s, ignored", | |
2027 | repeat ? "negative" : "zero"); | |
cd3b81bd KR |
2028 | ignore_rest_of_line (); |
2029 | return; | |
2030 | } | |
2031 | ||
e28c40d7 ILT |
2032 | /* If we are in the absolute section, just bump the offset. */ |
2033 | if (now_seg == absolute_section) | |
2034 | { | |
2035 | abs_section_offset += repeat; | |
2036 | demand_empty_rest_of_line (); | |
2037 | return; | |
2038 | } | |
2039 | ||
1356d77d ILT |
2040 | /* If we are secretly in an MRI common section, then creating |
2041 | space just increases the size of the common symbol. */ | |
2042 | if (mri_common_symbol != NULL) | |
2043 | { | |
2044 | S_SET_VALUE (mri_common_symbol, | |
2045 | S_GET_VALUE (mri_common_symbol) + repeat); | |
2046 | demand_empty_rest_of_line (); | |
2047 | return; | |
2048 | } | |
2049 | ||
cd3b81bd KR |
2050 | if (!need_pass_2) |
2051 | p = frag_var (rs_fill, 1, 1, (relax_substateT) 0, (symbolS *) 0, | |
931a8fab | 2052 | repeat, (char *) 0); |
6efd877d KR |
2053 | } |
2054 | else | |
2055 | { | |
e28c40d7 ILT |
2056 | if (now_seg == absolute_section) |
2057 | { | |
2058 | as_bad ("space allocation too complex in absolute section"); | |
2059 | subseg_set (text_section, 0); | |
2060 | } | |
1356d77d ILT |
2061 | if (mri_common_symbol != NULL) |
2062 | { | |
2063 | as_bad ("space allocation too complex in common section"); | |
2064 | mri_common_symbol = NULL; | |
2065 | } | |
cd3b81bd KR |
2066 | if (!need_pass_2) |
2067 | p = frag_var (rs_space, 1, 1, (relax_substateT) 0, | |
2068 | make_expr_symbol (&exp), 0L, (char *) 0); | |
6efd877d | 2069 | } |
931a8fab KR |
2070 | SKIP_WHITESPACE (); |
2071 | if (*input_line_pointer == ',') | |
6efd877d | 2072 | { |
931a8fab | 2073 | input_line_pointer++; |
cd3b81bd | 2074 | temp_fill = get_absolute_expression (); |
6efd877d | 2075 | } |
cd3b81bd | 2076 | else |
6efd877d | 2077 | { |
cd3b81bd | 2078 | temp_fill = 0; |
6efd877d | 2079 | } |
cd3b81bd | 2080 | if (p) |
6efd877d | 2081 | { |
6efd877d KR |
2082 | *p = temp_fill; |
2083 | } | |
2084 | demand_empty_rest_of_line (); | |
cd3b81bd | 2085 | } |
fecd2382 | 2086 | |
e28c40d7 ILT |
2087 | /* This is like s_space, but the value is a floating point number with |
2088 | the given precision. This is for the MRI dcb.s pseudo-op and | |
2089 | friends. */ | |
2090 | ||
2091 | void | |
2092 | s_float_space (float_type) | |
2093 | int float_type; | |
2094 | { | |
2095 | offsetT count; | |
2096 | int flen; | |
2097 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
2098 | ||
2099 | count = get_absolute_expression (); | |
2100 | ||
2101 | SKIP_WHITESPACE (); | |
2102 | if (*input_line_pointer != ',') | |
2103 | { | |
2104 | as_bad ("missing value"); | |
2105 | ignore_rest_of_line (); | |
2106 | return; | |
2107 | } | |
2108 | ||
2109 | ++input_line_pointer; | |
2110 | ||
2111 | SKIP_WHITESPACE (); | |
2112 | ||
2113 | /* Skip any 0{letter} that may be present. Don't even check if the | |
2114 | * letter is legal. */ | |
2115 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) | |
2116 | input_line_pointer += 2; | |
2117 | ||
2118 | /* Accept :xxxx, where the x's are hex digits, for a floating point | |
2119 | with the exact digits specified. */ | |
2120 | if (input_line_pointer[0] == ':') | |
2121 | { | |
2122 | flen = hex_float (float_type, temp); | |
2123 | if (flen < 0) | |
2124 | { | |
2125 | ignore_rest_of_line (); | |
2126 | return; | |
2127 | } | |
2128 | } | |
2129 | else | |
2130 | { | |
2131 | char *err; | |
2132 | ||
2133 | err = md_atof (float_type, temp, &flen); | |
2134 | know (flen <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
2135 | know (flen > 0); | |
2136 | if (err) | |
2137 | { | |
2138 | as_bad ("Bad floating literal: %s", err); | |
2139 | ignore_rest_of_line (); | |
2140 | return; | |
2141 | } | |
2142 | } | |
2143 | ||
2144 | while (--count >= 0) | |
2145 | { | |
2146 | char *p; | |
2147 | ||
2148 | p = frag_more (flen); | |
2149 | memcpy (p, temp, (unsigned int) flen); | |
2150 | } | |
2151 | ||
2152 | demand_empty_rest_of_line (); | |
2153 | } | |
2154 | ||
2155 | /* Handle the .struct pseudo-op, as found in MIPS assemblers. */ | |
2156 | ||
2157 | void | |
2158 | s_struct (ignore) | |
2159 | int ignore; | |
2160 | { | |
2161 | abs_section_offset = get_absolute_expression (); | |
2162 | subseg_set (absolute_section, 0); | |
2163 | demand_empty_rest_of_line (); | |
2164 | } | |
2165 | ||
fecd2382 | 2166 | void |
604633ae ILT |
2167 | s_text (ignore) |
2168 | int ignore; | |
fecd2382 | 2169 | { |
6efd877d | 2170 | register int temp; |
f8701a3f | 2171 | |
6efd877d | 2172 | temp = get_absolute_expression (); |
9471a360 | 2173 | subseg_set (text_section, (subsegT) temp); |
6efd877d | 2174 | demand_empty_rest_of_line (); |
80d80c64 KR |
2175 | #ifdef OBJ_VMS |
2176 | const_flag &= ~IN_DEFAULT_SECTION; | |
2177 | #endif | |
6efd877d | 2178 | } /* s_text() */ |
fecd2382 | 2179 | \f |
6efd877d | 2180 | |
6efd877d KR |
2181 | void |
2182 | demand_empty_rest_of_line () | |
2183 | { | |
2184 | SKIP_WHITESPACE (); | |
58d4951d | 2185 | if (is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
2186 | { |
2187 | input_line_pointer++; | |
2188 | } | |
2189 | else | |
2190 | { | |
2191 | ignore_rest_of_line (); | |
2192 | } | |
2193 | /* Return having already swallowed end-of-line. */ | |
2194 | } /* Return pointing just after end-of-line. */ | |
fecd2382 RP |
2195 | |
2196 | void | |
6efd877d | 2197 | ignore_rest_of_line () /* For suspect lines: gives warning. */ |
fecd2382 | 2198 | { |
58d4951d | 2199 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 2200 | { |
6efd877d KR |
2201 | if (isprint (*input_line_pointer)) |
2202 | as_bad ("Rest of line ignored. First ignored character is `%c'.", | |
f8701a3f SC |
2203 | *input_line_pointer); |
2204 | else | |
6efd877d | 2205 | as_bad ("Rest of line ignored. First ignored character valued 0x%x.", |
f8701a3f SC |
2206 | *input_line_pointer); |
2207 | while (input_line_pointer < buffer_limit | |
58d4951d | 2208 | && !is_end_of_line[(unsigned char) *input_line_pointer]) |
f8701a3f | 2209 | { |
6efd877d | 2210 | input_line_pointer++; |
f8701a3f SC |
2211 | } |
2212 | } | |
6efd877d | 2213 | input_line_pointer++; /* Return pointing just after end-of-line. */ |
58d4951d | 2214 | know (is_end_of_line[(unsigned char) input_line_pointer[-1]]); |
fecd2382 RP |
2215 | } |
2216 | ||
2217 | /* | |
2218 | * pseudo_set() | |
2219 | * | |
2220 | * In: Pointer to a symbol. | |
2221 | * Input_line_pointer->expression. | |
2222 | * | |
2223 | * Out: Input_line_pointer->just after any whitespace after expression. | |
2224 | * Tried to set symbol to value of expression. | |
2225 | * Will change symbols type, value, and frag; | |
fecd2382 RP |
2226 | */ |
2227 | void | |
f8701a3f | 2228 | pseudo_set (symbolP) |
6efd877d | 2229 | symbolS *symbolP; |
fecd2382 | 2230 | { |
6efd877d | 2231 | expressionS exp; |
daad3bbf | 2232 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
f8701a3f | 2233 | int ext; |
fecd2382 | 2234 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 2235 | |
6efd877d | 2236 | know (symbolP); /* NULL pointer is logic error. */ |
daad3bbf | 2237 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
6efd877d | 2238 | ext = S_IS_EXTERNAL (symbolP); |
fecd2382 | 2239 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
f8701a3f | 2240 | |
5ac34ac3 | 2241 | (void) expression (&exp); |
f8701a3f | 2242 | |
5ac34ac3 ILT |
2243 | if (exp.X_op == O_illegal) |
2244 | as_bad ("illegal expression; zero assumed"); | |
2245 | else if (exp.X_op == O_absent) | |
2246 | as_bad ("missing expression; zero assumed"); | |
2247 | else if (exp.X_op == O_big) | |
2248 | as_bad ("%s number invalid; zero assumed", | |
2249 | exp.X_add_number > 0 ? "bignum" : "floating point"); | |
2250 | else if (exp.X_op == O_subtract | |
2251 | && (S_GET_SEGMENT (exp.X_add_symbol) | |
2252 | == S_GET_SEGMENT (exp.X_op_symbol)) | |
2253 | && SEG_NORMAL (S_GET_SEGMENT (exp.X_add_symbol)) | |
2254 | && exp.X_add_symbol->sy_frag == exp.X_op_symbol->sy_frag) | |
9471a360 | 2255 | { |
5ac34ac3 ILT |
2256 | exp.X_op = O_constant; |
2257 | exp.X_add_number = (S_GET_VALUE (exp.X_add_symbol) | |
2258 | - S_GET_VALUE (exp.X_op_symbol)); | |
9471a360 | 2259 | } |
5ac34ac3 ILT |
2260 | |
2261 | switch (exp.X_op) | |
9471a360 | 2262 | { |
5ac34ac3 ILT |
2263 | case O_illegal: |
2264 | case O_absent: | |
2265 | case O_big: | |
2266 | exp.X_add_number = 0; | |
2267 | /* Fall through. */ | |
2268 | case O_constant: | |
9471a360 | 2269 | S_SET_SEGMENT (symbolP, absolute_section); |
daad3bbf | 2270 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
5ac34ac3 ILT |
2271 | if (ext) |
2272 | S_SET_EXTERNAL (symbolP); | |
6efd877d | 2273 | else |
6efd877d | 2274 | S_CLEAR_EXTERNAL (symbolP); |
fecd2382 | 2275 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
604633ae | 2276 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
6efd877d | 2277 | symbolP->sy_frag = &zero_address_frag; |
5ac34ac3 | 2278 | break; |
f8701a3f | 2279 | |
5ac34ac3 ILT |
2280 | case O_register: |
2281 | S_SET_SEGMENT (symbolP, reg_section); | |
604633ae | 2282 | S_SET_VALUE (symbolP, (valueT) exp.X_add_number); |
5ac34ac3 ILT |
2283 | symbolP->sy_frag = &zero_address_frag; |
2284 | break; | |
2285 | ||
2286 | case O_symbol: | |
ef198870 KR |
2287 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section |
2288 | || exp.X_add_number != 0) | |
5ac34ac3 | 2289 | symbolP->sy_value = exp; |
6efd877d KR |
2290 | else |
2291 | { | |
80d80c64 KR |
2292 | symbolS *s = exp.X_add_symbol; |
2293 | ||
2294 | S_SET_SEGMENT (symbolP, S_GET_SEGMENT (s)); | |
daad3bbf | 2295 | #if (defined (OBJ_AOUT) || defined (OBJ_BOUT)) && ! defined (BFD_ASSEMBLER) |
5ac34ac3 ILT |
2296 | if (ext) |
2297 | S_SET_EXTERNAL (symbolP); | |
2298 | else | |
2299 | S_CLEAR_EXTERNAL (symbolP); | |
fecd2382 | 2300 | #endif /* OBJ_AOUT or OBJ_BOUT */ |
5ac34ac3 | 2301 | S_SET_VALUE (symbolP, |
80d80c64 KR |
2302 | exp.X_add_number + S_GET_VALUE (s)); |
2303 | symbolP->sy_frag = s->sy_frag; | |
ef198870 | 2304 | copy_symbol_attributes (symbolP, s); |
5ac34ac3 ILT |
2305 | } |
2306 | break; | |
f8701a3f | 2307 | |
5ac34ac3 ILT |
2308 | default: |
2309 | /* The value is some complex expression. | |
2310 | FIXME: Should we set the segment to anything? */ | |
2311 | symbolP->sy_value = exp; | |
2312 | break; | |
f8701a3f | 2313 | } |
fecd2382 RP |
2314 | } |
2315 | \f | |
2316 | /* | |
2317 | * cons() | |
2318 | * | |
2319 | * CONStruct more frag of .bytes, or .words etc. | |
2320 | * Should need_pass_2 be 1 then emit no frag(s). | |
80aab579 | 2321 | * This understands EXPRESSIONS. |
fecd2382 RP |
2322 | * |
2323 | * Bug (?) | |
2324 | * | |
2325 | * This has a split personality. We use expression() to read the | |
2326 | * value. We can detect if the value won't fit in a byte or word. | |
2327 | * But we can't detect if expression() discarded significant digits | |
2328 | * in the case of a long. Not worth the crocks required to fix it. | |
2329 | */ | |
2330 | ||
40324362 KR |
2331 | /* Select a parser for cons expressions. */ |
2332 | ||
2333 | /* Some targets need to parse the expression in various fancy ways. | |
2334 | You can define TC_PARSE_CONS_EXPRESSION to do whatever you like | |
2335 | (for example, the HPPA does this). Otherwise, you can define | |
2336 | BITFIELD_CONS_EXPRESSIONS to permit bitfields to be specified, or | |
2337 | REPEAT_CONS_EXPRESSIONS to permit repeat counts. If none of these | |
2338 | are defined, which is the normal case, then only simple expressions | |
2339 | are permitted. */ | |
2340 | ||
1356d77d ILT |
2341 | static void |
2342 | parse_mri_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2343 | ||
40324362 KR |
2344 | #ifndef TC_PARSE_CONS_EXPRESSION |
2345 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
2346 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_bitfield_cons (EXP, NBYTES) | |
2347 | static void | |
2348 | parse_bitfield_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2349 | #endif | |
40324362 KR |
2350 | #ifdef REPEAT_CONS_EXPRESSIONS |
2351 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) parse_repeat_cons (EXP, NBYTES) | |
2352 | static void | |
2353 | parse_repeat_cons PARAMS ((expressionS *exp, unsigned int nbytes)); | |
2354 | #endif | |
2355 | ||
2356 | /* If we haven't gotten one yet, just call expression. */ | |
2357 | #ifndef TC_PARSE_CONS_EXPRESSION | |
2358 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) expression (EXP) | |
2359 | #endif | |
2360 | #endif | |
2361 | ||
6efd877d KR |
2362 | /* worker to do .byte etc statements */ |
2363 | /* clobbers input_line_pointer, checks */ | |
2364 | /* end-of-line. */ | |
2365 | void | |
2366 | cons (nbytes) | |
604633ae | 2367 | register int nbytes; /* 1=.byte, 2=.word, 4=.long */ |
fecd2382 | 2368 | { |
286cb27a | 2369 | int c; |
6efd877d | 2370 | expressionS exp; |
f8701a3f | 2371 | |
a2a5a4fa KR |
2372 | #ifdef md_flush_pending_output |
2373 | md_flush_pending_output (); | |
2374 | #endif | |
2375 | ||
40324362 | 2376 | if (is_it_end_of_statement ()) |
6efd877d | 2377 | { |
40324362 KR |
2378 | demand_empty_rest_of_line (); |
2379 | return; | |
6efd877d | 2380 | } |
40324362 | 2381 | |
286cb27a | 2382 | c = 0; |
40324362 | 2383 | do |
6efd877d | 2384 | { |
1356d77d ILT |
2385 | if (flag_mri) |
2386 | parse_mri_cons (&exp, (unsigned int) nbytes); | |
2387 | else | |
2388 | TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); | |
604633ae | 2389 | emit_expr (&exp, (unsigned int) nbytes); |
286cb27a | 2390 | ++c; |
40324362 KR |
2391 | } |
2392 | while (*input_line_pointer++ == ','); | |
2393 | ||
286cb27a ILT |
2394 | /* In MRI mode, after an odd number of bytes, we must align to an |
2395 | even word boundary, unless the next instruction is a dc.b, ds.b | |
2396 | or dcb.b. */ | |
2397 | if (flag_mri && nbytes == 1 && (c & 1) != 0) | |
2398 | mri_pending_align = 1; | |
2399 | ||
40324362 KR |
2400 | input_line_pointer--; /* Put terminator back into stream. */ |
2401 | demand_empty_rest_of_line (); | |
30d3a445 | 2402 | } |
f8701a3f | 2403 | |
40324362 KR |
2404 | /* Put the contents of expression EXP into the object file using |
2405 | NBYTES bytes. If need_pass_2 is 1, this does nothing. */ | |
f8701a3f | 2406 | |
40324362 KR |
2407 | void |
2408 | emit_expr (exp, nbytes) | |
2409 | expressionS *exp; | |
2410 | unsigned int nbytes; | |
2411 | { | |
5ac34ac3 | 2412 | operatorT op; |
40324362 | 2413 | register char *p; |
80aab579 | 2414 | valueT extra_digit = 0; |
f8701a3f | 2415 | |
40324362 KR |
2416 | /* Don't do anything if we are going to make another pass. */ |
2417 | if (need_pass_2) | |
2418 | return; | |
2419 | ||
5ac34ac3 | 2420 | op = exp->X_op; |
40324362 | 2421 | |
e28c40d7 ILT |
2422 | /* Allow `.word 0' in the absolute section. */ |
2423 | if (now_seg == absolute_section) | |
2424 | { | |
2425 | if (op != O_constant || exp->X_add_number != 0) | |
2426 | as_bad ("attempt to store value in absolute section"); | |
2427 | abs_section_offset += nbytes; | |
2428 | return; | |
2429 | } | |
2430 | ||
80aab579 ILT |
2431 | /* Handle a negative bignum. */ |
2432 | if (op == O_uminus | |
2433 | && exp->X_add_number == 0 | |
2434 | && exp->X_add_symbol->sy_value.X_op == O_big | |
2435 | && exp->X_add_symbol->sy_value.X_add_number > 0) | |
2436 | { | |
2437 | int i; | |
2438 | unsigned long carry; | |
2439 | ||
2440 | exp = &exp->X_add_symbol->sy_value; | |
2441 | ||
2442 | /* Negate the bignum: one's complement each digit and add 1. */ | |
2443 | carry = 1; | |
2444 | for (i = 0; i < exp->X_add_number; i++) | |
2445 | { | |
2446 | unsigned long next; | |
2447 | ||
2448 | next = (((~ (generic_bignum[i] & LITTLENUM_MASK)) | |
2449 | & LITTLENUM_MASK) | |
2450 | + carry); | |
2451 | generic_bignum[i] = next & LITTLENUM_MASK; | |
2452 | carry = next >> LITTLENUM_NUMBER_OF_BITS; | |
2453 | } | |
2454 | ||
2455 | /* We can ignore any carry out, because it will be handled by | |
2456 | extra_digit if it is needed. */ | |
2457 | ||
2458 | extra_digit = (valueT) -1; | |
2459 | op = O_big; | |
2460 | } | |
2461 | ||
5ac34ac3 | 2462 | if (op == O_absent || op == O_illegal) |
6efd877d | 2463 | { |
5ac34ac3 ILT |
2464 | as_warn ("zero assumed for missing expression"); |
2465 | exp->X_add_number = 0; | |
2466 | op = O_constant; | |
6efd877d | 2467 | } |
80aab579 | 2468 | else if (op == O_big && exp->X_add_number <= 0) |
6efd877d | 2469 | { |
80aab579 | 2470 | as_bad ("floating point number invalid; zero assumed"); |
40324362 | 2471 | exp->X_add_number = 0; |
5ac34ac3 | 2472 | op = O_constant; |
40324362 | 2473 | } |
5ac34ac3 | 2474 | else if (op == O_register) |
6efd877d | 2475 | { |
5ac34ac3 ILT |
2476 | as_warn ("register value used as expression"); |
2477 | op = O_constant; | |
40324362 | 2478 | } |
6efd877d | 2479 | |
604633ae | 2480 | p = frag_more ((int) nbytes); |
6efd877d | 2481 | |
40324362 KR |
2482 | #ifndef WORKING_DOT_WORD |
2483 | /* If we have the difference of two symbols in a word, save it on | |
2484 | the broken_words list. See the code in write.c. */ | |
5ac34ac3 | 2485 | if (op == O_subtract && nbytes == 2) |
40324362 KR |
2486 | { |
2487 | struct broken_word *x; | |
2488 | ||
2489 | x = (struct broken_word *) xmalloc (sizeof (struct broken_word)); | |
2490 | x->next_broken_word = broken_words; | |
2491 | broken_words = x; | |
2492 | x->frag = frag_now; | |
2493 | x->word_goes_here = p; | |
2494 | x->dispfrag = 0; | |
2495 | x->add = exp->X_add_symbol; | |
5ac34ac3 | 2496 | x->sub = exp->X_op_symbol; |
40324362 KR |
2497 | x->addnum = exp->X_add_number; |
2498 | x->added = 0; | |
2499 | new_broken_words++; | |
2500 | return; | |
2501 | } | |
f8701a3f | 2502 | #endif |
6efd877d | 2503 | |
80aab579 ILT |
2504 | /* If we have an integer, but the number of bytes is too large to |
2505 | pass to md_number_to_chars, handle it as a bignum. */ | |
2506 | if (op == O_constant && nbytes > sizeof (valueT)) | |
2507 | { | |
2508 | valueT val; | |
2509 | int gencnt; | |
2510 | ||
2511 | if (! exp->X_unsigned && exp->X_add_number < 0) | |
2512 | extra_digit = (valueT) -1; | |
2513 | val = (valueT) exp->X_add_number; | |
2514 | gencnt = 0; | |
2515 | do | |
2516 | { | |
2517 | generic_bignum[gencnt] = val & LITTLENUM_MASK; | |
2518 | val >>= LITTLENUM_NUMBER_OF_BITS; | |
2519 | ++gencnt; | |
2520 | } | |
2521 | while (val != 0); | |
2522 | op = exp->X_op = O_big; | |
2523 | exp->X_add_number = gencnt; | |
2524 | } | |
2525 | ||
5ac34ac3 | 2526 | if (op == O_constant) |
40324362 | 2527 | { |
44ce2f32 DE |
2528 | register valueT get; |
2529 | register valueT use; | |
2530 | register valueT mask; | |
2531 | register valueT unmask; | |
40324362 KR |
2532 | |
2533 | /* JF << of >= number of bits in the object is undefined. In | |
2534 | particular SPARC (Sun 4) has problems */ | |
44ce2f32 | 2535 | if (nbytes >= sizeof (valueT)) |
40324362 KR |
2536 | mask = 0; |
2537 | else | |
d2550c72 | 2538 | mask = ~(valueT) 0 << (BITS_PER_CHAR * nbytes); /* Don't store these bits. */ |
6efd877d | 2539 | |
40324362 | 2540 | unmask = ~mask; /* Do store these bits. */ |
6efd877d | 2541 | |
40324362 KR |
2542 | #ifdef NEVER |
2543 | "Do this mod if you want every overflow check to assume SIGNED 2's complement data."; | |
2544 | mask = ~(unmask >> 1); /* Includes sign bit now. */ | |
2545 | #endif | |
6efd877d | 2546 | |
40324362 KR |
2547 | get = exp->X_add_number; |
2548 | use = get & unmask; | |
2549 | if ((get & mask) != 0 && (get & mask) != mask) | |
2550 | { /* Leading bits contain both 0s & 1s. */ | |
58d4951d | 2551 | as_warn ("Value 0x%lx truncated to 0x%lx.", get, use); |
40324362 | 2552 | } |
604633ae | 2553 | /* put bytes in right order. */ |
44ce2f32 | 2554 | md_number_to_chars (p, use, (int) nbytes); |
40324362 | 2555 | } |
80aab579 ILT |
2556 | else if (op == O_big) |
2557 | { | |
2558 | int size; | |
2559 | LITTLENUM_TYPE *nums; | |
2560 | ||
2561 | know (nbytes % CHARS_PER_LITTLENUM == 0); | |
2562 | ||
2563 | size = exp->X_add_number * CHARS_PER_LITTLENUM; | |
2564 | if (nbytes < size) | |
2565 | { | |
2566 | as_warn ("Bignum truncated to %d bytes", nbytes); | |
2567 | size = nbytes; | |
2568 | } | |
2569 | ||
2570 | if (target_big_endian) | |
2571 | { | |
2572 | while (nbytes > size) | |
2573 | { | |
2574 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
2575 | nbytes -= CHARS_PER_LITTLENUM; | |
2576 | p += CHARS_PER_LITTLENUM; | |
2577 | } | |
2578 | ||
2579 | nums = generic_bignum + size / CHARS_PER_LITTLENUM; | |
2580 | while (size > 0) | |
2581 | { | |
2582 | --nums; | |
2583 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
2584 | size -= CHARS_PER_LITTLENUM; | |
2585 | p += CHARS_PER_LITTLENUM; | |
2586 | } | |
2587 | } | |
2588 | else | |
2589 | { | |
2590 | nums = generic_bignum; | |
2591 | while (size > 0) | |
2592 | { | |
2593 | md_number_to_chars (p, (valueT) *nums, CHARS_PER_LITTLENUM); | |
2594 | ++nums; | |
2595 | size -= CHARS_PER_LITTLENUM; | |
2596 | p += CHARS_PER_LITTLENUM; | |
2597 | nbytes -= CHARS_PER_LITTLENUM; | |
2598 | } | |
2599 | ||
2600 | while (nbytes > 0) | |
2601 | { | |
2602 | md_number_to_chars (p, extra_digit, CHARS_PER_LITTLENUM); | |
2603 | nbytes -= CHARS_PER_LITTLENUM; | |
2604 | p += CHARS_PER_LITTLENUM; | |
2605 | } | |
2606 | } | |
2607 | } | |
40324362 KR |
2608 | else |
2609 | { | |
1fbfe108 | 2610 | memset (p, 0, nbytes); |
6efd877d | 2611 | |
40324362 KR |
2612 | /* Now we need to generate a fixS to record the symbol value. |
2613 | This is easy for BFD. For other targets it can be more | |
2614 | complex. For very complex cases (currently, the HPPA and | |
2615 | NS32K), you can define TC_CONS_FIX_NEW to do whatever you | |
2616 | want. For simpler cases, you can define TC_CONS_RELOC to be | |
2617 | the name of the reloc code that should be stored in the fixS. | |
2618 | If neither is defined, the code uses NO_RELOC if it is | |
2619 | defined, and otherwise uses 0. */ | |
6efd877d | 2620 | |
40324362 | 2621 | #ifdef BFD_ASSEMBLER |
4064305e SS |
2622 | #ifdef TC_CONS_FIX_NEW |
2623 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
2624 | #else | |
604633ae | 2625 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 2626 | /* @@ Should look at CPU word size. */ |
ba71c54d KR |
2627 | nbytes == 2 ? BFD_RELOC_16 |
2628 | : nbytes == 8 ? BFD_RELOC_64 | |
2629 | : BFD_RELOC_32); | |
4064305e | 2630 | #endif |
40324362 KR |
2631 | #else |
2632 | #ifdef TC_CONS_FIX_NEW | |
2633 | TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp); | |
2634 | #else | |
2635 | /* Figure out which reloc number to use. Use TC_CONS_RELOC if | |
2636 | it is defined, otherwise use NO_RELOC if it is defined, | |
2637 | otherwise use 0. */ | |
2638 | #ifndef TC_CONS_RELOC | |
2639 | #ifdef NO_RELOC | |
2640 | #define TC_CONS_RELOC NO_RELOC | |
2641 | #else | |
2642 | #define TC_CONS_RELOC 0 | |
2643 | #endif | |
2644 | #endif | |
80aab579 | 2645 | fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp, 0, |
5ac34ac3 | 2646 | TC_CONS_RELOC); |
40324362 KR |
2647 | #endif /* TC_CONS_FIX_NEW */ |
2648 | #endif /* BFD_ASSEMBLER */ | |
2649 | } | |
2650 | } | |
2651 | \f | |
2652 | #ifdef BITFIELD_CONS_EXPRESSIONS | |
6efd877d | 2653 | |
40324362 KR |
2654 | /* i960 assemblers, (eg, asm960), allow bitfields after ".byte" as |
2655 | w:x,y:z, where w and y are bitwidths and x and y are values. They | |
2656 | then pack them all together. We do a little better in that we allow | |
2657 | them in words, longs, etc. and we'll pack them in target byte order | |
2658 | for you. | |
6efd877d | 2659 | |
40324362 KR |
2660 | The rules are: pack least significat bit first, if a field doesn't |
2661 | entirely fit, put it in the next unit. Overflowing the bitfield is | |
2662 | explicitly *not* even a warning. The bitwidth should be considered | |
2663 | a "mask". | |
6efd877d | 2664 | |
40324362 KR |
2665 | To use this function the tc-XXX.h file should define |
2666 | BITFIELD_CONS_EXPRESSIONS. */ | |
f8701a3f | 2667 | |
40324362 KR |
2668 | static void |
2669 | parse_bitfield_cons (exp, nbytes) | |
2670 | expressionS *exp; | |
2671 | unsigned int nbytes; | |
2672 | { | |
2673 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
2674 | char *hold = input_line_pointer; | |
f8701a3f | 2675 | |
5ac34ac3 | 2676 | (void) expression (exp); |
f8701a3f | 2677 | |
40324362 KR |
2678 | if (*input_line_pointer == ':') |
2679 | { /* bitfields */ | |
2680 | long value = 0; | |
f8701a3f | 2681 | |
40324362 KR |
2682 | for (;;) |
2683 | { | |
2684 | unsigned long width; | |
f8701a3f | 2685 | |
40324362 KR |
2686 | if (*input_line_pointer != ':') |
2687 | { | |
2688 | input_line_pointer = hold; | |
2689 | break; | |
2690 | } /* next piece is not a bitfield */ | |
2691 | ||
2692 | /* In the general case, we can't allow | |
2693 | full expressions with symbol | |
2694 | differences and such. The relocation | |
2695 | entries for symbols not defined in this | |
2696 | assembly would require arbitrary field | |
2697 | widths, positions, and masks which most | |
2698 | of our current object formats don't | |
2699 | support. | |
cd3b81bd | 2700 | |
40324362 KR |
2701 | In the specific case where a symbol |
2702 | *is* defined in this assembly, we | |
2703 | *could* build fixups and track it, but | |
2704 | this could lead to confusion for the | |
2705 | backends. I'm lazy. I'll take any | |
2706 | SEG_ABSOLUTE. I think that means that | |
2707 | you can use a previous .set or | |
2708 | .equ type symbol. xoxorich. */ | |
2709 | ||
5ac34ac3 | 2710 | if (exp->X_op == O_absent) |
6efd877d | 2711 | { |
5ac34ac3 | 2712 | as_warn ("using a bit field width of zero"); |
40324362 | 2713 | exp->X_add_number = 0; |
5ac34ac3 | 2714 | exp->X_op = O_constant; |
40324362 KR |
2715 | } /* implied zero width bitfield */ |
2716 | ||
5ac34ac3 | 2717 | if (exp->X_op != O_constant) |
6efd877d | 2718 | { |
40324362 | 2719 | *input_line_pointer = '\0'; |
5ac34ac3 | 2720 | as_bad ("field width \"%s\" too complex for a bitfield", hold); |
40324362 KR |
2721 | *input_line_pointer = ':'; |
2722 | demand_empty_rest_of_line (); | |
2723 | return; | |
2724 | } /* too complex */ | |
2725 | ||
2726 | if ((width = exp->X_add_number) > (BITS_PER_CHAR * nbytes)) | |
9471a360 | 2727 | { |
80aab579 | 2728 | as_warn ("field width %lu too big to fit in %d bytes: truncated to %d bits", |
40324362 KR |
2729 | width, nbytes, (BITS_PER_CHAR * nbytes)); |
2730 | width = BITS_PER_CHAR * nbytes; | |
2731 | } /* too big */ | |
2732 | ||
2733 | if (width > bits_available) | |
9471a360 | 2734 | { |
40324362 KR |
2735 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ |
2736 | input_line_pointer = hold; | |
2737 | exp->X_add_number = value; | |
2738 | break; | |
2739 | } /* won't fit */ | |
2740 | ||
2741 | hold = ++input_line_pointer; /* skip ':' */ | |
2742 | ||
5ac34ac3 ILT |
2743 | (void) expression (exp); |
2744 | if (exp->X_op != O_constant) | |
9471a360 | 2745 | { |
40324362 KR |
2746 | char cache = *input_line_pointer; |
2747 | ||
2748 | *input_line_pointer = '\0'; | |
5ac34ac3 | 2749 | as_bad ("field value \"%s\" too complex for a bitfield", hold); |
40324362 KR |
2750 | *input_line_pointer = cache; |
2751 | demand_empty_rest_of_line (); | |
2752 | return; | |
2753 | } /* too complex */ | |
2754 | ||
5ac34ac3 ILT |
2755 | value |= ((~(-1 << width) & exp->X_add_number) |
2756 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
40324362 KR |
2757 | |
2758 | if ((bits_available -= width) == 0 | |
2759 | || is_it_end_of_statement () | |
2760 | || *input_line_pointer != ',') | |
2761 | { | |
2762 | break; | |
2763 | } /* all the bitfields we're gonna get */ | |
2764 | ||
2765 | hold = ++input_line_pointer; | |
5ac34ac3 | 2766 | (void) expression (exp); |
40324362 KR |
2767 | } /* forever loop */ |
2768 | ||
2769 | exp->X_add_number = value; | |
5ac34ac3 | 2770 | exp->X_op = O_constant; |
80aab579 | 2771 | exp->X_unsigned = 1; |
40324362 KR |
2772 | } /* if looks like a bitfield */ |
2773 | } /* parse_bitfield_cons() */ | |
2774 | ||
2775 | #endif /* BITFIELD_CONS_EXPRESSIONS */ | |
2776 | \f | |
1356d77d | 2777 | /* Handle an MRI style string expression. */ |
40324362 KR |
2778 | |
2779 | static void | |
2780 | parse_mri_cons (exp, nbytes) | |
2781 | expressionS *exp; | |
2782 | unsigned int nbytes; | |
2783 | { | |
1356d77d ILT |
2784 | if (*input_line_pointer != '\'' |
2785 | && (input_line_pointer[1] != '\'' | |
2786 | || (*input_line_pointer != 'A' | |
2787 | && *input_line_pointer != 'E'))) | |
2788 | TC_PARSE_CONS_EXPRESSION (exp, nbytes); | |
2789 | else | |
40324362 | 2790 | { |
40324362 KR |
2791 | int scan = 0; |
2792 | unsigned int result = 0; | |
1356d77d ILT |
2793 | |
2794 | /* An MRI style string. Cut into as many bytes as will fit into | |
2795 | a nbyte chunk, left justify if necessary, and separate with | |
2796 | commas so we can try again later. */ | |
2797 | if (*input_line_pointer == 'A') | |
2798 | ++input_line_pointer; | |
2799 | else if (*input_line_pointer == 'E') | |
2800 | { | |
2801 | as_bad ("EBCDIC constants are not supported"); | |
2802 | ++input_line_pointer; | |
2803 | } | |
2804 | ||
40324362 KR |
2805 | input_line_pointer++; |
2806 | for (scan = 0; scan < nbytes; scan++) | |
2807 | { | |
2808 | if (*input_line_pointer == '\'') | |
2809 | { | |
2810 | if (input_line_pointer[1] == '\'') | |
6efd877d | 2811 | { |
40324362 | 2812 | input_line_pointer++; |
f8701a3f | 2813 | } |
40324362 KR |
2814 | else |
2815 | break; | |
9471a360 | 2816 | } |
40324362 KR |
2817 | result = (result << 8) | (*input_line_pointer++); |
2818 | } | |
f8701a3f | 2819 | |
40324362 KR |
2820 | /* Left justify */ |
2821 | while (scan < nbytes) | |
2822 | { | |
2823 | result <<= 8; | |
2824 | scan++; | |
2825 | } | |
2826 | /* Create correct expression */ | |
5ac34ac3 | 2827 | exp->X_op = O_constant; |
40324362 | 2828 | exp->X_add_number = result; |
40324362 KR |
2829 | /* Fake it so that we can read the next char too */ |
2830 | if (input_line_pointer[0] != '\'' || | |
2831 | (input_line_pointer[0] == '\'' && input_line_pointer[1] == '\'')) | |
2832 | { | |
2833 | input_line_pointer -= 2; | |
2834 | input_line_pointer[0] = ','; | |
2835 | input_line_pointer[1] = '\''; | |
2836 | } | |
2837 | else | |
2838 | input_line_pointer++; | |
2839 | } | |
40324362 | 2840 | } |
40324362 KR |
2841 | \f |
2842 | #ifdef REPEAT_CONS_EXPRESSIONS | |
2843 | ||
2844 | /* Parse a repeat expression for cons. This is used by the MIPS | |
2845 | assembler. The format is NUMBER:COUNT; NUMBER appears in the | |
2846 | object file COUNT times. | |
2847 | ||
2848 | To use this for a target, define REPEAT_CONS_EXPRESSIONS. */ | |
2849 | ||
2850 | static void | |
2851 | parse_repeat_cons (exp, nbytes) | |
2852 | expressionS *exp; | |
2853 | unsigned int nbytes; | |
2854 | { | |
2855 | expressionS count; | |
40324362 KR |
2856 | register int i; |
2857 | ||
2858 | expression (exp); | |
2859 | ||
2860 | if (*input_line_pointer != ':') | |
2861 | { | |
2862 | /* No repeat count. */ | |
2863 | return; | |
2864 | } | |
2865 | ||
2866 | ++input_line_pointer; | |
5ac34ac3 ILT |
2867 | expression (&count); |
2868 | if (count.X_op != O_constant | |
40324362 KR |
2869 | || count.X_add_number <= 0) |
2870 | { | |
2871 | as_warn ("Unresolvable or nonpositive repeat count; using 1"); | |
2872 | return; | |
2873 | } | |
2874 | ||
2875 | /* The cons function is going to output this expression once. So we | |
2876 | output it count - 1 times. */ | |
2877 | for (i = count.X_add_number - 1; i > 0; i--) | |
2878 | emit_expr (exp, nbytes); | |
2879 | } | |
2880 | ||
2881 | #endif /* REPEAT_CONS_EXPRESSIONS */ | |
fecd2382 | 2882 | \f |
e28c40d7 ILT |
2883 | /* Parse a floating point number represented as a hex constant. This |
2884 | permits users to specify the exact bits they want in the floating | |
2885 | point number. */ | |
2886 | ||
2887 | static int | |
2888 | hex_float (float_type, bytes) | |
2889 | int float_type; | |
2890 | char *bytes; | |
2891 | { | |
2892 | int length; | |
2893 | int i; | |
2894 | ||
2895 | switch (float_type) | |
2896 | { | |
2897 | case 'f': | |
2898 | case 'F': | |
2899 | case 's': | |
2900 | case 'S': | |
2901 | length = 4; | |
2902 | break; | |
2903 | ||
2904 | case 'd': | |
2905 | case 'D': | |
2906 | case 'r': | |
2907 | case 'R': | |
2908 | length = 8; | |
2909 | break; | |
2910 | ||
2911 | case 'x': | |
2912 | case 'X': | |
2913 | length = 12; | |
2914 | break; | |
2915 | ||
2916 | case 'p': | |
2917 | case 'P': | |
2918 | length = 12; | |
2919 | break; | |
2920 | ||
2921 | default: | |
2922 | as_bad ("Unknown floating type type '%c'", float_type); | |
2923 | return -1; | |
2924 | } | |
2925 | ||
2926 | /* It would be nice if we could go through expression to parse the | |
2927 | hex constant, but if we get a bignum it's a pain to sort it into | |
2928 | the buffer correctly. */ | |
2929 | i = 0; | |
2930 | while (hex_p (*input_line_pointer) || *input_line_pointer == '_') | |
2931 | { | |
2932 | int d; | |
2933 | ||
2934 | /* The MRI assembler accepts arbitrary underscores strewn about | |
2935 | through the hex constant, so we ignore them as well. */ | |
2936 | if (*input_line_pointer == '_') | |
2937 | { | |
2938 | ++input_line_pointer; | |
2939 | continue; | |
2940 | } | |
2941 | ||
2942 | if (i >= length) | |
2943 | { | |
2944 | as_warn ("Floating point constant too large"); | |
2945 | return -1; | |
2946 | } | |
2947 | d = hex_value (*input_line_pointer) << 4; | |
2948 | ++input_line_pointer; | |
2949 | while (*input_line_pointer == '_') | |
2950 | ++input_line_pointer; | |
2951 | if (hex_p (*input_line_pointer)) | |
2952 | { | |
2953 | d += hex_value (*input_line_pointer); | |
2954 | ++input_line_pointer; | |
2955 | } | |
a920b693 ILT |
2956 | if (target_big_endian) |
2957 | bytes[i] = d; | |
2958 | else | |
2959 | bytes[length - i - 1] = d; | |
2960 | ++i; | |
e28c40d7 ILT |
2961 | } |
2962 | ||
2963 | if (i < length) | |
a920b693 ILT |
2964 | { |
2965 | if (target_big_endian) | |
2966 | memset (bytes + i, 0, length - i); | |
2967 | else | |
2968 | memset (bytes, 0, length - i); | |
2969 | } | |
e28c40d7 ILT |
2970 | |
2971 | return length; | |
2972 | } | |
2973 | ||
fecd2382 RP |
2974 | /* |
2975 | * float_cons() | |
2976 | * | |
2977 | * CONStruct some more frag chars of .floats .ffloats etc. | |
2978 | * Makes 0 or more new frags. | |
2979 | * If need_pass_2 == 1, no frags are emitted. | |
2980 | * This understands only floating literals, not expressions. Sorry. | |
2981 | * | |
2982 | * A floating constant is defined by atof_generic(), except it is preceded | |
2983 | * by 0d 0f 0g or 0h. After observing the STRANGE way my BSD AS does its | |
2984 | * reading, I decided to be incompatible. This always tries to give you | |
2985 | * rounded bits to the precision of the pseudo-op. Former AS did premature | |
2986 | * truncatation, restored noisy bits instead of trailing 0s AND gave you | |
2987 | * a choice of 2 flavours of noise according to which of 2 floating-point | |
2988 | * scanners you directed AS to use. | |
2989 | * | |
2990 | * In: input_line_pointer->whitespace before, or '0' of flonum. | |
2991 | * | |
2992 | */ | |
2993 | ||
ba71c54d KR |
2994 | void |
2995 | float_cons (float_type) | |
6efd877d | 2996 | /* Clobbers input_line-pointer, checks end-of-line. */ |
f8701a3f | 2997 | register int float_type; /* 'f':.ffloat ... 'F':.float ... */ |
fecd2382 | 2998 | { |
6efd877d | 2999 | register char *p; |
6efd877d KR |
3000 | int length; /* Number of chars in an object. */ |
3001 | register char *err; /* Error from scanning floating literal. */ | |
3002 | char temp[MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT]; | |
f8701a3f | 3003 | |
6efd877d | 3004 | if (is_it_end_of_statement ()) |
f8701a3f | 3005 | { |
1e9cf565 ILT |
3006 | demand_empty_rest_of_line (); |
3007 | return; | |
f8701a3f | 3008 | } |
1e9cf565 ILT |
3009 | |
3010 | do | |
f8701a3f SC |
3011 | { |
3012 | /* input_line_pointer->1st char of a flonum (we hope!). */ | |
6efd877d | 3013 | SKIP_WHITESPACE (); |
1e9cf565 | 3014 | |
f8701a3f SC |
3015 | /* Skip any 0{letter} that may be present. Don't even check if the |
3016 | * letter is legal. Someone may invent a "z" format and this routine | |
3017 | * has no use for such information. Lusers beware: you get | |
3018 | * diagnostics if your input is ill-conditioned. | |
3019 | */ | |
6efd877d KR |
3020 | if (input_line_pointer[0] == '0' && isalpha (input_line_pointer[1])) |
3021 | input_line_pointer += 2; | |
f8701a3f | 3022 | |
1356d77d ILT |
3023 | /* Accept :xxxx, where the x's are hex digits, for a floating |
3024 | point with the exact digits specified. */ | |
3025 | if (input_line_pointer[0] == ':') | |
f8701a3f | 3026 | { |
e28c40d7 ILT |
3027 | ++input_line_pointer; |
3028 | length = hex_float (float_type, temp); | |
3029 | if (length < 0) | |
1356d77d | 3030 | { |
1356d77d ILT |
3031 | ignore_rest_of_line (); |
3032 | return; | |
3033 | } | |
1356d77d ILT |
3034 | } |
3035 | else | |
3036 | { | |
3037 | err = md_atof (float_type, temp, &length); | |
3038 | know (length <= MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT); | |
3039 | know (length > 0); | |
3040 | if (err) | |
3041 | { | |
3042 | as_bad ("Bad floating literal: %s", err); | |
3043 | ignore_rest_of_line (); | |
3044 | return; | |
3045 | } | |
f8701a3f | 3046 | } |
1e9cf565 ILT |
3047 | |
3048 | if (!need_pass_2) | |
f8701a3f | 3049 | { |
1e9cf565 ILT |
3050 | int count; |
3051 | ||
3052 | count = 1; | |
3053 | ||
3054 | #ifdef REPEAT_CONS_EXPRESSIONS | |
3055 | if (*input_line_pointer == ':') | |
3056 | { | |
1e9cf565 ILT |
3057 | expressionS count_exp; |
3058 | ||
3059 | ++input_line_pointer; | |
5ac34ac3 ILT |
3060 | expression (&count_exp); |
3061 | if (count_exp.X_op != O_constant | |
1e9cf565 ILT |
3062 | || count_exp.X_add_number <= 0) |
3063 | { | |
5ac34ac3 | 3064 | as_warn ("unresolvable or nonpositive repeat count; using 1"); |
1e9cf565 ILT |
3065 | } |
3066 | else | |
3067 | count = count_exp.X_add_number; | |
3068 | } | |
3069 | #endif | |
3070 | ||
3071 | while (--count >= 0) | |
a39116f1 | 3072 | { |
f8701a3f | 3073 | p = frag_more (length); |
604633ae | 3074 | memcpy (p, temp, (unsigned int) length); |
a39116f1 | 3075 | } |
542e1629 | 3076 | } |
1e9cf565 | 3077 | SKIP_WHITESPACE (); |
f8701a3f | 3078 | } |
1e9cf565 ILT |
3079 | while (*input_line_pointer++ == ','); |
3080 | ||
3081 | --input_line_pointer; /* Put terminator back into stream. */ | |
6efd877d | 3082 | demand_empty_rest_of_line (); |
f8701a3f | 3083 | } /* float_cons() */ |
fecd2382 RP |
3084 | \f |
3085 | /* | |
3086 | * stringer() | |
3087 | * | |
3088 | * We read 0 or more ',' seperated, double-quoted strings. | |
3089 | * | |
3090 | * Caller should have checked need_pass_2 is FALSE because we don't check it. | |
3091 | */ | |
a39116f1 RP |
3092 | |
3093 | ||
6efd877d KR |
3094 | void |
3095 | stringer (append_zero) /* Worker to do .ascii etc statements. */ | |
3096 | /* Checks end-of-line. */ | |
f8701a3f | 3097 | register int append_zero; /* 0: don't append '\0', else 1 */ |
fecd2382 | 3098 | { |
f8701a3f | 3099 | register unsigned int c; |
6efd877d | 3100 | |
a2a5a4fa KR |
3101 | #ifdef md_flush_pending_output |
3102 | md_flush_pending_output (); | |
3103 | #endif | |
3104 | ||
f8701a3f SC |
3105 | /* |
3106 | * The following awkward logic is to parse ZERO or more strings, | |
3107 | * comma seperated. Recall a string expression includes spaces | |
3108 | * before the opening '\"' and spaces after the closing '\"'. | |
3109 | * We fake a leading ',' if there is (supposed to be) | |
3110 | * a 1st, expression. We keep demanding expressions for each | |
3111 | * ','. | |
3112 | */ | |
6efd877d KR |
3113 | if (is_it_end_of_statement ()) |
3114 | { | |
3115 | c = 0; /* Skip loop. */ | |
3116 | ++input_line_pointer; /* Compensate for end of loop. */ | |
3117 | } | |
f8701a3f | 3118 | else |
6efd877d KR |
3119 | { |
3120 | c = ','; /* Do loop. */ | |
3121 | } | |
3122 | while (c == ',' || c == '<' || c == '"') | |
3123 | { | |
3124 | SKIP_WHITESPACE (); | |
3125 | switch (*input_line_pointer) | |
3126 | { | |
3127 | case '\"': | |
3128 | ++input_line_pointer; /*->1st char of string. */ | |
3129 | while (is_a_char (c = next_char_of_string ())) | |
3130 | { | |
3131 | FRAG_APPEND_1_CHAR (c); | |
3132 | } | |
3133 | if (append_zero) | |
3134 | { | |
3135 | FRAG_APPEND_1_CHAR (0); | |
3136 | } | |
3137 | know (input_line_pointer[-1] == '\"'); | |
3138 | break; | |
3139 | case '<': | |
3140 | input_line_pointer++; | |
3141 | c = get_single_number (); | |
3142 | FRAG_APPEND_1_CHAR (c); | |
3143 | if (*input_line_pointer != '>') | |
3144 | { | |
3145 | as_bad ("Expected <nn>"); | |
3146 | } | |
3147 | input_line_pointer++; | |
3148 | break; | |
3149 | case ',': | |
3150 | input_line_pointer++; | |
3151 | break; | |
3152 | } | |
3153 | SKIP_WHITESPACE (); | |
3154 | c = *input_line_pointer; | |
f8701a3f | 3155 | } |
f8701a3f | 3156 | |
6efd877d KR |
3157 | demand_empty_rest_of_line (); |
3158 | } /* stringer() */ | |
fecd2382 | 3159 | \f |
6efd877d | 3160 | /* FIXME-SOMEDAY: I had trouble here on characters with the |
f8701a3f SC |
3161 | high bits set. We'll probably also have trouble with |
3162 | multibyte chars, wide chars, etc. Also be careful about | |
3163 | returning values bigger than 1 byte. xoxorich. */ | |
fecd2382 | 3164 | |
6efd877d KR |
3165 | unsigned int |
3166 | next_char_of_string () | |
3167 | { | |
3168 | register unsigned int c; | |
3169 | ||
3170 | c = *input_line_pointer++ & CHAR_MASK; | |
3171 | switch (c) | |
3172 | { | |
3173 | case '\"': | |
3174 | c = NOT_A_CHAR; | |
3175 | break; | |
3176 | ||
ddb393cf | 3177 | #ifndef NO_STRING_ESCAPES |
6efd877d KR |
3178 | case '\\': |
3179 | switch (c = *input_line_pointer++) | |
3180 | { | |
3181 | case 'b': | |
3182 | c = '\b'; | |
3183 | break; | |
3184 | ||
3185 | case 'f': | |
3186 | c = '\f'; | |
3187 | break; | |
3188 | ||
3189 | case 'n': | |
3190 | c = '\n'; | |
3191 | break; | |
3192 | ||
3193 | case 'r': | |
3194 | c = '\r'; | |
3195 | break; | |
3196 | ||
3197 | case 't': | |
3198 | c = '\t'; | |
3199 | break; | |
3200 | ||
6efd877d KR |
3201 | case 'v': |
3202 | c = '\013'; | |
3203 | break; | |
6efd877d KR |
3204 | |
3205 | case '\\': | |
3206 | case '"': | |
3207 | break; /* As itself. */ | |
3208 | ||
3209 | case '0': | |
3210 | case '1': | |
3211 | case '2': | |
3212 | case '3': | |
3213 | case '4': | |
3214 | case '5': | |
3215 | case '6': | |
3216 | case '7': | |
3217 | case '8': | |
3218 | case '9': | |
3219 | { | |
3220 | long number; | |
d4c8cbd8 | 3221 | int i; |
6efd877d | 3222 | |
d4c8cbd8 | 3223 | for (i = 0, number = 0; isdigit (c) && i < 3; c = *input_line_pointer++, i++) |
6efd877d KR |
3224 | { |
3225 | number = number * 8 + c - '0'; | |
3226 | } | |
3227 | c = number & 0xff; | |
3228 | } | |
3229 | --input_line_pointer; | |
3230 | break; | |
3231 | ||
d4c8cbd8 JL |
3232 | case 'x': |
3233 | case 'X': | |
3234 | { | |
3235 | long number; | |
3236 | ||
3237 | number = 0; | |
3238 | c = *input_line_pointer++; | |
3239 | while (isxdigit (c)) | |
3240 | { | |
3241 | if (isdigit (c)) | |
3242 | number = number * 16 + c - '0'; | |
3243 | else if (isupper (c)) | |
3244 | number = number * 16 + c - 'A' + 10; | |
3245 | else | |
3246 | number = number * 16 + c - 'a' + 10; | |
3247 | c = *input_line_pointer++; | |
3248 | } | |
3249 | c = number & 0xff; | |
3250 | --input_line_pointer; | |
3251 | } | |
3252 | break; | |
3253 | ||
6efd877d KR |
3254 | case '\n': |
3255 | /* To be compatible with BSD 4.2 as: give the luser a linefeed!! */ | |
3256 | as_warn ("Unterminated string: Newline inserted."); | |
3257 | c = '\n'; | |
3258 | break; | |
3259 | ||
3260 | default: | |
3261 | ||
fecd2382 | 3262 | #ifdef ONLY_STANDARD_ESCAPES |
6efd877d KR |
3263 | as_bad ("Bad escaped character in string, '?' assumed"); |
3264 | c = '?'; | |
fecd2382 | 3265 | #endif /* ONLY_STANDARD_ESCAPES */ |
6efd877d KR |
3266 | |
3267 | break; | |
3268 | } /* switch on escaped char */ | |
3269 | break; | |
ddb393cf | 3270 | #endif /* ! defined (NO_STRING_ESCAPES) */ |
6efd877d KR |
3271 | |
3272 | default: | |
3273 | break; | |
3274 | } /* switch on char */ | |
3275 | return (c); | |
3276 | } /* next_char_of_string() */ | |
fecd2382 RP |
3277 | \f |
3278 | static segT | |
f8701a3f | 3279 | get_segmented_expression (expP) |
6efd877d | 3280 | register expressionS *expP; |
fecd2382 | 3281 | { |
6efd877d | 3282 | register segT retval; |
f8701a3f | 3283 | |
9471a360 | 3284 | retval = expression (expP); |
5ac34ac3 ILT |
3285 | if (expP->X_op == O_illegal |
3286 | || expP->X_op == O_absent | |
3287 | || expP->X_op == O_big) | |
f8701a3f | 3288 | { |
5ac34ac3 ILT |
3289 | as_bad ("expected address expression; zero assumed"); |
3290 | expP->X_op = O_constant; | |
6efd877d | 3291 | expP->X_add_number = 0; |
5ac34ac3 | 3292 | retval = absolute_section; |
f8701a3f | 3293 | } |
5ac34ac3 | 3294 | return retval; |
fecd2382 RP |
3295 | } |
3296 | ||
6efd877d KR |
3297 | static segT |
3298 | get_known_segmented_expression (expP) | |
3299 | register expressionS *expP; | |
fecd2382 | 3300 | { |
6efd877d | 3301 | register segT retval; |
f8701a3f | 3302 | |
9471a360 | 3303 | if ((retval = get_segmented_expression (expP)) == undefined_section) |
f8701a3f | 3304 | { |
5ac34ac3 ILT |
3305 | /* There is no easy way to extract the undefined symbol from the |
3306 | expression. */ | |
3307 | if (expP->X_add_symbol != NULL | |
3308 | && S_GET_SEGMENT (expP->X_add_symbol) != expr_section) | |
3309 | as_warn ("symbol \"%s\" undefined; zero assumed", | |
3310 | S_GET_NAME (expP->X_add_symbol)); | |
f8701a3f | 3311 | else |
5ac34ac3 ILT |
3312 | as_warn ("some symbol undefined; zero assumed"); |
3313 | retval = absolute_section; | |
3314 | expP->X_op = O_constant; | |
6efd877d | 3315 | expP->X_add_number = 0; |
f8701a3f | 3316 | } |
5ac34ac3 | 3317 | know (retval == absolute_section || SEG_NORMAL (retval)); |
f8701a3f | 3318 | return (retval); |
fecd2382 RP |
3319 | } /* get_known_segmented_expression() */ |
3320 | ||
58d4951d | 3321 | offsetT |
f8701a3f | 3322 | get_absolute_expression () |
fecd2382 | 3323 | { |
6efd877d | 3324 | expressionS exp; |
f8701a3f | 3325 | |
5ac34ac3 ILT |
3326 | expression (&exp); |
3327 | if (exp.X_op != O_constant) | |
f8701a3f | 3328 | { |
5ac34ac3 | 3329 | if (exp.X_op != O_absent) |
cd3b81bd | 3330 | as_bad ("bad or irreducible absolute expression; zero assumed"); |
6efd877d | 3331 | exp.X_add_number = 0; |
f8701a3f | 3332 | } |
5ac34ac3 | 3333 | return exp.X_add_number; |
fecd2382 RP |
3334 | } |
3335 | ||
6efd877d KR |
3336 | char /* return terminator */ |
3337 | get_absolute_expression_and_terminator (val_pointer) | |
3338 | long *val_pointer; /* return value of expression */ | |
fecd2382 | 3339 | { |
58d4951d ILT |
3340 | /* FIXME: val_pointer should probably be offsetT *. */ |
3341 | *val_pointer = (long) get_absolute_expression (); | |
6efd877d | 3342 | return (*input_line_pointer++); |
fecd2382 RP |
3343 | } |
3344 | \f | |
3345 | /* | |
3346 | * demand_copy_C_string() | |
3347 | * | |
3348 | * Like demand_copy_string, but return NULL if the string contains any '\0's. | |
3349 | * Give a warning if that happens. | |
3350 | */ | |
3351 | char * | |
f8701a3f | 3352 | demand_copy_C_string (len_pointer) |
6efd877d | 3353 | int *len_pointer; |
fecd2382 | 3354 | { |
6efd877d | 3355 | register char *s; |
f8701a3f | 3356 | |
6efd877d | 3357 | if ((s = demand_copy_string (len_pointer)) != 0) |
f8701a3f SC |
3358 | { |
3359 | register int len; | |
3360 | ||
6efd877d | 3361 | for (len = *len_pointer; |
f8701a3f SC |
3362 | len > 0; |
3363 | len--) | |
3364 | { | |
6efd877d | 3365 | if (*s == 0) |
fecd2382 | 3366 | { |
f8701a3f SC |
3367 | s = 0; |
3368 | len = 1; | |
6efd877d KR |
3369 | *len_pointer = 0; |
3370 | as_bad ("This string may not contain \'\\0\'"); | |
fecd2382 | 3371 | } |
f8701a3f SC |
3372 | } |
3373 | } | |
3374 | return (s); | |
fecd2382 RP |
3375 | } |
3376 | \f | |
3377 | /* | |
3378 | * demand_copy_string() | |
3379 | * | |
3380 | * Demand string, but return a safe (=private) copy of the string. | |
3381 | * Return NULL if we can't read a string here. | |
3382 | */ | |
6ef37255 | 3383 | char * |
6efd877d KR |
3384 | demand_copy_string (lenP) |
3385 | int *lenP; | |
fecd2382 | 3386 | { |
6efd877d KR |
3387 | register unsigned int c; |
3388 | register int len; | |
3389 | char *retval; | |
3390 | ||
3391 | len = 0; | |
3392 | SKIP_WHITESPACE (); | |
3393 | if (*input_line_pointer == '\"') | |
3394 | { | |
3395 | input_line_pointer++; /* Skip opening quote. */ | |
3396 | ||
3397 | while (is_a_char (c = next_char_of_string ())) | |
3398 | { | |
3399 | obstack_1grow (¬es, c); | |
3400 | len++; | |
fecd2382 | 3401 | } |
6efd877d KR |
3402 | /* JF this next line is so demand_copy_C_string will return a null |
3403 | termanated string. */ | |
3404 | obstack_1grow (¬es, '\0'); | |
3405 | retval = obstack_finish (¬es); | |
3406 | } | |
3407 | else | |
3408 | { | |
3409 | as_warn ("Missing string"); | |
3410 | retval = NULL; | |
3411 | ignore_rest_of_line (); | |
3412 | } | |
3413 | *lenP = len; | |
3414 | return (retval); | |
3415 | } /* demand_copy_string() */ | |
fecd2382 RP |
3416 | \f |
3417 | /* | |
3418 | * is_it_end_of_statement() | |
3419 | * | |
3420 | * In: Input_line_pointer->next character. | |
3421 | * | |
3422 | * Do: Skip input_line_pointer over all whitespace. | |
3423 | * | |
3424 | * Out: 1 if input_line_pointer->end-of-line. | |
f8701a3f | 3425 | */ |
6efd877d KR |
3426 | int |
3427 | is_it_end_of_statement () | |
3428 | { | |
3429 | SKIP_WHITESPACE (); | |
58d4951d | 3430 | return (is_end_of_line[(unsigned char) *input_line_pointer]); |
6efd877d | 3431 | } /* is_it_end_of_statement() */ |
fecd2382 | 3432 | |
6efd877d KR |
3433 | void |
3434 | equals (sym_name) | |
3435 | char *sym_name; | |
fecd2382 | 3436 | { |
6efd877d | 3437 | register symbolS *symbolP; /* symbol we are working with */ |
f8701a3f SC |
3438 | |
3439 | input_line_pointer++; | |
6efd877d | 3440 | if (*input_line_pointer == '=') |
f8701a3f SC |
3441 | input_line_pointer++; |
3442 | ||
6efd877d | 3443 | while (*input_line_pointer == ' ' || *input_line_pointer == '\t') |
f8701a3f SC |
3444 | input_line_pointer++; |
3445 | ||
6efd877d KR |
3446 | if (sym_name[0] == '.' && sym_name[1] == '\0') |
3447 | { | |
3448 | /* Turn '. = mumble' into a .org mumble */ | |
3449 | register segT segment; | |
3450 | expressionS exp; | |
f8701a3f | 3451 | |
6efd877d KR |
3452 | segment = get_known_segmented_expression (&exp); |
3453 | if (!need_pass_2) | |
e28c40d7 | 3454 | do_org (segment, &exp, 0); |
6efd877d KR |
3455 | } |
3456 | else | |
3457 | { | |
3458 | symbolP = symbol_find_or_make (sym_name); | |
3459 | pseudo_set (symbolP); | |
3460 | } | |
3461 | } /* equals() */ | |
fecd2382 RP |
3462 | |
3463 | /* .include -- include a file at this point. */ | |
3464 | ||
3465 | /* ARGSUSED */ | |
6efd877d KR |
3466 | void |
3467 | s_include (arg) | |
3468 | int arg; | |
fecd2382 | 3469 | { |
f8701a3f SC |
3470 | char *newbuf; |
3471 | char *filename; | |
3472 | int i; | |
3473 | FILE *try; | |
3474 | char *path; | |
3475 | ||
ca232972 ILT |
3476 | if (! flag_mri) |
3477 | filename = demand_copy_string (&i); | |
3478 | else | |
3479 | { | |
3480 | SKIP_WHITESPACE (); | |
3481 | i = 0; | |
3482 | while (! is_end_of_line[(unsigned char) *input_line_pointer] | |
3483 | && *input_line_pointer != ' ' | |
3484 | && *input_line_pointer != '\t') | |
3485 | { | |
3486 | obstack_1grow (¬es, *input_line_pointer); | |
3487 | ++input_line_pointer; | |
3488 | ++i; | |
3489 | } | |
3490 | obstack_1grow (¬es, '\0'); | |
3491 | filename = obstack_finish (¬es); | |
3492 | } | |
6efd877d | 3493 | demand_empty_rest_of_line (); |
604633ae | 3494 | path = xmalloc ((unsigned long) i + include_dir_maxlen + 5 /* slop */ ); |
6efd877d KR |
3495 | for (i = 0; i < include_dir_count; i++) |
3496 | { | |
3497 | strcpy (path, include_dirs[i]); | |
3498 | strcat (path, "/"); | |
3499 | strcat (path, filename); | |
f2889110 | 3500 | if (0 != (try = fopen (path, "r"))) |
6efd877d KR |
3501 | { |
3502 | fclose (try); | |
3503 | goto gotit; | |
3504 | } | |
3505 | } | |
3506 | free (path); | |
f8701a3f SC |
3507 | path = filename; |
3508 | gotit: | |
3509 | /* malloc Storage leak when file is found on path. FIXME-SOMEDAY. */ | |
3510 | newbuf = input_scrub_include_file (path, input_line_pointer); | |
3511 | buffer_limit = input_scrub_next_buffer (&input_line_pointer); | |
6efd877d | 3512 | } /* s_include() */ |
fecd2382 | 3513 | |
6efd877d KR |
3514 | void |
3515 | add_include_dir (path) | |
3516 | char *path; | |
fecd2382 | 3517 | { |
f8701a3f SC |
3518 | int i; |
3519 | ||
3520 | if (include_dir_count == 0) | |
3521 | { | |
6efd877d | 3522 | include_dirs = (char **) xmalloc (2 * sizeof (*include_dirs)); |
f8701a3f SC |
3523 | include_dirs[0] = "."; /* Current dir */ |
3524 | include_dir_count = 2; | |
3525 | } | |
3526 | else | |
3527 | { | |
3528 | include_dir_count++; | |
6efd877d KR |
3529 | include_dirs = (char **) realloc (include_dirs, |
3530 | include_dir_count * sizeof (*include_dirs)); | |
f8701a3f SC |
3531 | } |
3532 | ||
6efd877d | 3533 | include_dirs[include_dir_count - 1] = path; /* New one */ |
f8701a3f | 3534 | |
6efd877d KR |
3535 | i = strlen (path); |
3536 | if (i > include_dir_maxlen) | |
3537 | include_dir_maxlen = i; | |
3538 | } /* add_include_dir() */ | |
fecd2382 | 3539 | |
6efd877d KR |
3540 | void |
3541 | s_ignore (arg) | |
3542 | int arg; | |
fecd2382 | 3543 | { |
58d4951d | 3544 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) |
6efd877d KR |
3545 | { |
3546 | ++input_line_pointer; | |
3547 | } | |
3548 | ++input_line_pointer; | |
4064305e SS |
3549 | } |
3550 | ||
604633ae | 3551 | |
fecd2382 | 3552 | /* end of read.c */ |