Commit | Line | Data |
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fecd2382 | 1 | /* a.out object file format |
85051959 ILT |
2 | Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc. |
3 | ||
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as | |
8 | published by the Free Software Foundation; either version 2, | |
9 | or (at your option) any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
14 | the GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public | |
17 | License along with GAS; see the file COPYING. If not, write | |
18 | to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
fecd2382 RP |
19 | |
20 | #include "as.h" | |
604633ae | 21 | #ifdef BFD_ASSEMBLER |
2c5c299f | 22 | #include "aout/aout64.h" |
604633ae | 23 | #endif |
fecd2382 RP |
24 | #include "obstack.h" |
25 | ||
85051959 | 26 | #ifndef BFD_ASSEMBLER |
a39116f1 | 27 | /* in: segT out: N_TYPE bits */ |
85051959 ILT |
28 | const short seg_N_TYPE[] = |
29 | { | |
30 | N_ABS, | |
31 | N_TEXT, | |
32 | N_DATA, | |
33 | N_BSS, | |
34 | N_UNDF, /* unknown */ | |
85051959 | 35 | N_UNDF, /* error */ |
5ac34ac3 | 36 | N_UNDF, /* expression */ |
85051959 ILT |
37 | N_UNDF, /* debug */ |
38 | N_UNDF, /* ntv */ | |
39 | N_UNDF, /* ptv */ | |
40 | N_REGISTER, /* register */ | |
fecd2382 RP |
41 | }; |
42 | ||
85051959 ILT |
43 | const segT N_TYPE_seg[N_TYPE + 2] = |
44 | { /* N_TYPE == 0x1E = 32-2 */ | |
45 | SEG_UNKNOWN, /* N_UNDF == 0 */ | |
46 | SEG_GOOF, | |
47 | SEG_ABSOLUTE, /* N_ABS == 2 */ | |
48 | SEG_GOOF, | |
49 | SEG_TEXT, /* N_TEXT == 4 */ | |
50 | SEG_GOOF, | |
51 | SEG_DATA, /* N_DATA == 6 */ | |
52 | SEG_GOOF, | |
53 | SEG_BSS, /* N_BSS == 8 */ | |
54 | SEG_GOOF, | |
55 | SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, | |
56 | SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, | |
57 | SEG_GOOF, SEG_GOOF, SEG_GOOF, SEG_GOOF, | |
58 | SEG_REGISTER, /* dummy N_REGISTER for regs = 30 */ | |
59 | SEG_GOOF, | |
fecd2382 | 60 | }; |
85051959 ILT |
61 | #endif |
62 | ||
604633ae | 63 | static void obj_aout_line PARAMS ((int)); |
fecd2382 | 64 | |
85051959 ILT |
65 | const pseudo_typeS obj_pseudo_table[] = |
66 | { | |
85051959 ILT |
67 | {"line", obj_aout_line, 0}, /* source code line number */ |
68 | {"ln", obj_aout_line, 0}, /* coff line number that we use anyway */ | |
fecd2382 | 69 | |
85051959 ILT |
70 | /* coff debug pseudos (ignored) */ |
71 | {"def", s_ignore, 0}, | |
72 | {"dim", s_ignore, 0}, | |
73 | {"endef", s_ignore, 0}, | |
74 | {"ident", s_ignore, 0}, | |
75 | {"line", s_ignore, 0}, | |
76 | {"ln", s_ignore, 0}, | |
77 | {"scl", s_ignore, 0}, | |
78 | {"size", s_ignore, 0}, | |
79 | {"tag", s_ignore, 0}, | |
80 | {"type", s_ignore, 0}, | |
81 | {"val", s_ignore, 0}, | |
82 | {"version", s_ignore, 0}, | |
83 | ||
85051959 ILT |
84 | {"optim", s_ignore, 0}, /* For sun386i cc (?) */ |
85 | ||
86 | /* other stuff */ | |
87 | {"ABORT", s_abort, 0}, | |
88 | ||
89 | {NULL} /* end sentinel */ | |
90 | }; /* obj_pseudo_table */ | |
91 | ||
92 | ||
93 | #ifdef BFD_ASSEMBLER | |
94 | ||
95 | void | |
96 | obj_aout_frob_symbol (sym, punt) | |
97 | symbolS *sym; | |
98 | int *punt; | |
99 | { | |
100 | flagword flags; | |
101 | asection *sec; | |
102 | int desc, type, other; | |
103 | ||
85051959 ILT |
104 | flags = sym->bsym->flags; |
105 | desc = S_GET_DESC (sym); | |
106 | type = S_GET_TYPE (sym); | |
107 | other = S_GET_OTHER (sym); | |
108 | sec = sym->bsym->section; | |
109 | ||
110 | /* Only frob simple symbols this way right now. */ | |
2c5c299f | 111 | if (! (type & ~ (N_TYPE | N_EXT))) |
85051959 | 112 | { |
4bda835f ILT |
113 | if (type == (N_UNDF | N_EXT) |
114 | && sec == &bfd_abs_section) | |
115 | sym->bsym->section = sec = &bfd_und_section; | |
116 | ||
117 | if ((type & N_TYPE) != N_INDR | |
13655af6 | 118 | && type != N_WARNING |
4bda835f ILT |
119 | && (sec == &bfd_abs_section |
120 | || sec == &bfd_und_section)) | |
85051959 ILT |
121 | return; |
122 | if (flags & BSF_EXPORT) | |
2c5c299f ILT |
123 | type |= N_EXT; |
124 | ||
2c5c299f ILT |
125 | switch (type & N_TYPE) |
126 | { | |
127 | case N_SETA: | |
128 | case N_SETT: | |
129 | case N_SETD: | |
130 | case N_SETB: | |
4bda835f ILT |
131 | /* Set the debugging flag for constructor symbols so that |
132 | BFD leaves them alone. */ | |
2c5c299f ILT |
133 | sym->bsym->flags |= BSF_DEBUGGING; |
134 | break; | |
4bda835f ILT |
135 | case N_INDR: |
136 | /* Put indirect symbols in the indirect section. */ | |
137 | sym->bsym->section = &bfd_ind_section; | |
138 | sym->bsym->flags |= BSF_INDIRECT; | |
139 | break; | |
13655af6 ILT |
140 | case N_WARNING: |
141 | /* Mark warning symbols. */ | |
142 | sym->bsym->flags |= BSF_WARNING; | |
143 | break; | |
2c5c299f | 144 | } |
85051959 ILT |
145 | } |
146 | else | |
147 | { | |
148 | sym->bsym->flags |= BSF_DEBUGGING; | |
149 | } | |
150 | ||
151 | S_SET_TYPE (sym, type); | |
152 | } | |
153 | ||
154 | #else | |
fecd2382 RP |
155 | |
156 | /* Relocation. */ | |
157 | ||
fecd2382 RP |
158 | /* |
159 | * emit_relocations() | |
160 | * | |
161 | * Crawl along a fixS chain. Emit the segment's relocations. | |
162 | */ | |
85051959 ILT |
163 | void |
164 | obj_emit_relocations (where, fixP, segment_address_in_file) | |
165 | char **where; | |
166 | fixS *fixP; /* Fixup chain for this segment. */ | |
167 | relax_addressT segment_address_in_file; | |
fecd2382 | 168 | { |
85051959 ILT |
169 | for (; fixP; fixP = fixP->fx_next) |
170 | if (fixP->fx_addsy != NULL) | |
171 | { | |
172 | tc_aout_fix_to_chars (*where, fixP, segment_address_in_file); | |
173 | *where += md_reloc_size; | |
174 | } | |
175 | } | |
fecd2382 | 176 | |
85051959 | 177 | #ifndef obj_header_append |
fecd2382 | 178 | /* Aout file generation & utilities */ |
85051959 ILT |
179 | void |
180 | obj_header_append (where, headers) | |
181 | char **where; | |
182 | object_headers *headers; | |
fecd2382 | 183 | { |
85051959 ILT |
184 | tc_headers_hook (headers); |
185 | ||
a39116f1 | 186 | #ifdef CROSS_COMPILE |
85051959 ILT |
187 | md_number_to_chars (*where, headers->header.a_info, sizeof (headers->header.a_info)); |
188 | *where += sizeof (headers->header.a_info); | |
189 | md_number_to_chars (*where, headers->header.a_text, sizeof (headers->header.a_text)); | |
190 | *where += sizeof (headers->header.a_text); | |
191 | md_number_to_chars (*where, headers->header.a_data, sizeof (headers->header.a_data)); | |
192 | *where += sizeof (headers->header.a_data); | |
193 | md_number_to_chars (*where, headers->header.a_bss, sizeof (headers->header.a_bss)); | |
194 | *where += sizeof (headers->header.a_bss); | |
195 | md_number_to_chars (*where, headers->header.a_syms, sizeof (headers->header.a_syms)); | |
196 | *where += sizeof (headers->header.a_syms); | |
197 | md_number_to_chars (*where, headers->header.a_entry, sizeof (headers->header.a_entry)); | |
198 | *where += sizeof (headers->header.a_entry); | |
199 | md_number_to_chars (*where, headers->header.a_trsize, sizeof (headers->header.a_trsize)); | |
200 | *where += sizeof (headers->header.a_trsize); | |
201 | md_number_to_chars (*where, headers->header.a_drsize, sizeof (headers->header.a_drsize)); | |
202 | *where += sizeof (headers->header.a_drsize); | |
203 | ||
a39116f1 | 204 | #else /* CROSS_COMPILE */ |
85051959 ILT |
205 | |
206 | append (where, (char *) &headers->header, sizeof (headers->header)); | |
a39116f1 | 207 | #endif /* CROSS_COMPILE */ |
fecd2382 | 208 | |
85051959 ILT |
209 | } |
210 | #endif | |
211 | ||
212 | void | |
213 | obj_symbol_to_chars (where, symbolP) | |
214 | char **where; | |
215 | symbolS *symbolP; | |
fecd2382 | 216 | { |
85051959 ILT |
217 | md_number_to_chars ((char *) &(S_GET_OFFSET (symbolP)), S_GET_OFFSET (symbolP), sizeof (S_GET_OFFSET (symbolP))); |
218 | md_number_to_chars ((char *) &(S_GET_DESC (symbolP)), S_GET_DESC (symbolP), sizeof (S_GET_DESC (symbolP))); | |
219 | md_number_to_chars ((char *) &(symbolP->sy_symbol.n_value), S_GET_VALUE (symbolP), sizeof (symbolP->sy_symbol.n_value)); | |
220 | ||
221 | append (where, (char *) &symbolP->sy_symbol, sizeof (obj_symbol_type)); | |
222 | } | |
fecd2382 | 223 | |
85051959 ILT |
224 | void |
225 | obj_emit_symbols (where, symbol_rootP) | |
226 | char **where; | |
227 | symbolS *symbol_rootP; | |
fecd2382 | 228 | { |
85051959 ILT |
229 | symbolS *symbolP; |
230 | ||
231 | /* Emit all symbols left in the symbol chain. */ | |
232 | for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP)) | |
233 | { | |
234 | /* Used to save the offset of the name. It is used to point | |
235 | to the string in memory but must be a file offset. */ | |
236 | register char *temp; | |
237 | ||
238 | temp = S_GET_NAME (symbolP); | |
239 | S_SET_OFFSET (symbolP, symbolP->sy_name_offset); | |
fecd2382 | 240 | |
85051959 ILT |
241 | /* Any symbol still undefined and is not a dbg symbol is made N_EXT. */ |
242 | if (!S_IS_DEBUG (symbolP) && !S_IS_DEFINED (symbolP)) | |
243 | S_SET_EXTERNAL (symbolP); | |
244 | ||
245 | obj_symbol_to_chars (where, symbolP); | |
246 | S_SET_NAME (symbolP, temp); | |
247 | } | |
248 | } | |
249 | ||
250 | #endif /* ! BFD_ASSEMBLER */ | |
251 | ||
252 | static void | |
604633ae ILT |
253 | obj_aout_line (ignore) |
254 | int ignore; | |
85051959 ILT |
255 | { |
256 | /* Assume delimiter is part of expression. | |
257 | BSD4.2 as fails with delightful bug, so we | |
258 | are not being incompatible here. */ | |
259 | new_logical_line ((char *) NULL, (int) (get_absolute_expression ())); | |
260 | demand_empty_rest_of_line (); | |
261 | } /* obj_aout_line() */ | |
fecd2382 | 262 | |
85051959 ILT |
263 | void |
264 | obj_read_begin_hook () | |
265 | { | |
4bda835f | 266 | } |
85051959 ILT |
267 | |
268 | #ifndef BFD_ASSEMBLER | |
fecd2382 | 269 | |
85051959 ILT |
270 | void |
271 | obj_crawl_symbol_chain (headers) | |
272 | object_headers *headers; | |
fecd2382 | 273 | { |
85051959 ILT |
274 | symbolS *symbolP; |
275 | symbolS **symbolPP; | |
276 | int symbol_number = 0; | |
277 | ||
85051959 ILT |
278 | tc_crawl_symbol_chain (headers); |
279 | ||
280 | symbolPP = &symbol_rootP; /*->last symbol chain link. */ | |
281 | while ((symbolP = *symbolPP) != NULL) | |
282 | { | |
283 | if (flagseen['R'] && (S_GET_SEGMENT (symbolP) == SEG_DATA)) | |
284 | { | |
285 | S_SET_SEGMENT (symbolP, SEG_TEXT); | |
286 | } /* if pusing data into text */ | |
287 | ||
5868b1fe | 288 | resolve_symbol_value (symbolP); |
85051959 ILT |
289 | |
290 | /* OK, here is how we decide which symbols go out into the brave | |
291 | new symtab. Symbols that do are: | |
292 | ||
293 | * symbols with no name (stabd's?) | |
294 | * symbols with debug info in their N_TYPE | |
295 | ||
296 | Symbols that don't are: | |
297 | * symbols that are registers | |
298 | * symbols with \1 as their 3rd character (numeric labels) | |
299 | * "local labels" as defined by S_LOCAL_NAME(name) if the -L | |
300 | switch was passed to gas. | |
301 | ||
302 | All other symbols are output. We complain if a deleted | |
303 | symbol was marked external. */ | |
304 | ||
305 | ||
306 | if (!S_IS_REGISTER (symbolP) | |
307 | && (!S_GET_NAME (symbolP) | |
308 | || S_IS_DEBUG (symbolP) | |
fecd2382 | 309 | #ifdef TC_I960 |
85051959 ILT |
310 | /* FIXME-SOON this ifdef seems highly dubious to me. xoxorich. */ |
311 | || !S_IS_DEFINED (symbolP) | |
312 | || S_IS_EXTERNAL (symbolP) | |
fecd2382 | 313 | #endif /* TC_I960 */ |
85051959 ILT |
314 | || (S_GET_NAME (symbolP)[0] != '\001' && (flagseen['L'] || !S_LOCAL_NAME (symbolP))))) |
315 | { | |
316 | symbolP->sy_number = symbol_number++; | |
317 | ||
318 | /* The + 1 after strlen account for the \0 at the | |
fecd2382 | 319 | end of each string */ |
85051959 ILT |
320 | if (!S_IS_STABD (symbolP)) |
321 | { | |
322 | /* Ordinary case. */ | |
323 | symbolP->sy_name_offset = string_byte_count; | |
324 | string_byte_count += strlen (S_GET_NAME (symbolP)) + 1; | |
325 | } | |
326 | else /* .Stabd case. */ | |
327 | symbolP->sy_name_offset = 0; | |
328 | symbolPP = &(symbol_next (symbolP)); | |
329 | } | |
330 | else | |
331 | { | |
332 | if (S_IS_EXTERNAL (symbolP) || !S_IS_DEFINED (symbolP)) | |
333 | { | |
334 | as_bad ("Local symbol %s never defined.", decode_local_label_name (S_GET_NAME (symbolP))); | |
335 | } /* oops. */ | |
336 | ||
337 | /* Unhook it from the chain */ | |
338 | *symbolPP = symbol_next (symbolP); | |
339 | } /* if this symbol should be in the output */ | |
340 | } /* for each symbol */ | |
341 | ||
342 | H_SET_SYMBOL_TABLE_SIZE (headers, symbol_number); | |
4bda835f | 343 | } |
fecd2382 RP |
344 | |
345 | /* | |
346 | * Find strings by crawling along symbol table chain. | |
347 | */ | |
348 | ||
85051959 ILT |
349 | void |
350 | obj_emit_strings (where) | |
351 | char **where; | |
fecd2382 | 352 | { |
85051959 ILT |
353 | symbolS *symbolP; |
354 | ||
a39116f1 | 355 | #ifdef CROSS_COMPILE |
85051959 ILT |
356 | /* Gotta do md_ byte-ordering stuff for string_byte_count first - KWK */ |
357 | md_number_to_chars (*where, string_byte_count, sizeof (string_byte_count)); | |
358 | *where += sizeof (string_byte_count); | |
a39116f1 | 359 | #else /* CROSS_COMPILE */ |
85051959 | 360 | append (where, (char *) &string_byte_count, (unsigned long) sizeof (string_byte_count)); |
a39116f1 | 361 | #endif /* CROSS_COMPILE */ |
fecd2382 | 362 | |
85051959 ILT |
363 | for (symbolP = symbol_rootP; symbolP; symbolP = symbol_next (symbolP)) |
364 | { | |
365 | if (S_GET_NAME (symbolP)) | |
366 | append (&next_object_file_charP, S_GET_NAME (symbolP), | |
367 | (unsigned long) (strlen (S_GET_NAME (symbolP)) + 1)); | |
368 | } /* walk symbol chain */ | |
4bda835f | 369 | } |
85051959 ILT |
370 | |
371 | #ifndef AOUT_VERSION | |
372 | #define AOUT_VERSION 0 | |
373 | #endif | |
374 | ||
375 | void | |
376 | obj_pre_write_hook (headers) | |
377 | object_headers *headers; | |
a39116f1 | 378 | { |
85051959 ILT |
379 | H_SET_DYNAMIC (headers, 0); |
380 | H_SET_VERSION (headers, AOUT_VERSION); | |
381 | H_SET_MACHTYPE (headers, AOUT_MACHTYPE); | |
382 | tc_aout_pre_write_hook (headers); | |
4bda835f | 383 | } |
a39116f1 | 384 | |
85051959 ILT |
385 | void |
386 | DEFUN_VOID (s_sect) | |
387 | { | |
388 | /* Strip out the section name */ | |
389 | char *section_name; | |
390 | char *section_name_end; | |
391 | char c; | |
392 | ||
393 | unsigned int len; | |
394 | unsigned int exp; | |
395 | char *save; | |
396 | ||
397 | section_name = input_line_pointer; | |
398 | c = get_symbol_end (); | |
399 | section_name_end = input_line_pointer; | |
400 | ||
401 | len = section_name_end - section_name; | |
402 | input_line_pointer++; | |
403 | save = input_line_pointer; | |
404 | ||
405 | SKIP_WHITESPACE (); | |
406 | if (c == ',') | |
407 | { | |
408 | exp = get_absolute_expression (); | |
409 | } | |
410 | else if (*input_line_pointer == ',') | |
411 | { | |
412 | input_line_pointer++; | |
413 | exp = get_absolute_expression (); | |
414 | } | |
415 | else | |
416 | { | |
417 | input_line_pointer = save; | |
418 | exp = 0; | |
419 | } | |
420 | if (exp >= 1000) | |
421 | { | |
422 | as_bad ("subsegment index too high"); | |
423 | } | |
424 | ||
425 | if (strcmp (section_name, ".text") == 0) | |
426 | { | |
604633ae | 427 | subseg_set (SEG_TEXT, (subsegT) exp); |
85051959 ILT |
428 | } |
429 | ||
430 | if (strcmp (section_name, ".data") == 0) | |
431 | { | |
432 | if (flagseen['R']) | |
604633ae | 433 | subseg_set (SEG_TEXT, (subsegT) exp + 1000); |
85051959 | 434 | else |
604633ae | 435 | subseg_set (SEG_DATA, (subsegT) exp); |
85051959 ILT |
436 | } |
437 | ||
438 | *section_name_end = c; | |
439 | } | |
440 | ||
441 | #endif /* ! BFD_ASSEMBLER */ | |
fecd2382 RP |
442 | |
443 | /* end of obj-aout.c */ |