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882bdc69 ILT |
1 | /* tc-ppc.c -- Assemble for the PowerPC or POWER (RS/6000) |
2 | Copyright (C) 1994 Free Software Foundation, Inc. | |
3 | Written by Ian Lance Taylor, Cygnus Support. | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | #include <stdio.h> | |
22 | #include <ctype.h> | |
23 | #include "as.h" | |
24 | #include "subsegs.h" | |
25 | ||
26 | #include "opcode/ppc.h" | |
27 | ||
28 | /* This is the assembler for the PowerPC or POWER (RS/6000) chips. */ | |
29 | ||
30 | /* FIXME: This should be handled in a different way. */ | |
31 | extern int target_big_endian; | |
32 | ||
33 | static void ppc_set_cpu PARAMS ((void)); | |
34 | static unsigned long ppc_insert_operand | |
35 | PARAMS ((unsigned long insn, const struct powerpc_operand *operand, | |
36 | offsetT val, char *file, unsigned int line)); | |
37 | static void ppc_macro PARAMS ((char *str, const struct powerpc_macro *macro)); | |
38 | static void ppc_byte PARAMS ((int)); | |
39 | static int ppc_is_toc_sym PARAMS ((symbolS *sym)); | |
40 | static void ppc_tc PARAMS ((int)); | |
41 | #ifdef OBJ_COFF | |
42 | static void ppc_comm PARAMS ((int)); | |
43 | static void ppc_bb PARAMS ((int)); | |
44 | static void ppc_bf PARAMS ((int)); | |
45 | static void ppc_biei PARAMS ((int)); | |
46 | static void ppc_bs PARAMS ((int)); | |
47 | static void ppc_eb PARAMS ((int)); | |
48 | static void ppc_ef PARAMS ((int)); | |
49 | static void ppc_es PARAMS ((int)); | |
50 | static void ppc_csect PARAMS ((int)); | |
51 | static void ppc_function PARAMS ((int)); | |
52 | static void ppc_extern PARAMS ((int)); | |
53 | static void ppc_lglobl PARAMS ((int)); | |
54 | static void ppc_stabx PARAMS ((int)); | |
55 | static void ppc_rename PARAMS ((int)); | |
56 | static void ppc_toc PARAMS ((int)); | |
57 | #endif | |
58 | \f | |
59 | /* Generic assembler global variables which must be defined by all | |
60 | targets. */ | |
61 | ||
62 | /* Characters which always start a comment. */ | |
63 | const char comment_chars[] = "#"; | |
64 | ||
65 | /* Characters which start a comment at the beginning of a line. */ | |
66 | const char line_comment_chars[] = "#"; | |
67 | ||
68 | /* Characters which may be used to separate multiple commands on a | |
69 | single line. */ | |
70 | const char line_separator_chars[] = ";"; | |
71 | ||
72 | /* Characters which are used to indicate an exponent in a floating | |
73 | point number. */ | |
74 | const char EXP_CHARS[] = "eE"; | |
75 | ||
76 | /* Characters which mean that a number is a floating point constant, | |
77 | as in 0d1.0. */ | |
78 | const char FLT_CHARS[] = "dD"; | |
79 | \f | |
80 | /* The target specific pseudo-ops which we support. */ | |
81 | ||
82 | const pseudo_typeS md_pseudo_table[] = | |
83 | { | |
84 | /* Pseudo-ops which must be overridden. */ | |
85 | { "byte", ppc_byte, 0 }, | |
86 | ||
87 | #ifdef OBJ_COFF | |
88 | /* Pseudo-ops specific to the RS/6000 XCOFF format. Some of these | |
89 | legitimately belong in the obj-*.c file. However, XCOFF is based | |
90 | on COFF, and is only implemented for the RS/6000. We just use | |
91 | obj-coff.c, and add what we need here. */ | |
92 | { "comm", ppc_comm, 0 }, | |
93 | { "lcomm", ppc_comm, 1 }, | |
94 | { "bb", ppc_bb, 0 }, | |
95 | { "bf", ppc_bf, 0 }, | |
96 | { "bi", ppc_biei, 0 }, | |
97 | { "bs", ppc_bs, 0 }, | |
98 | { "csect", ppc_csect, 0 }, | |
99 | { "eb", ppc_eb, 0 }, | |
100 | { "ef", ppc_ef, 0 }, | |
101 | { "ei", ppc_biei, 1 }, | |
102 | { "es", ppc_es, 0 }, | |
103 | { "extern", ppc_extern, 0 }, | |
104 | { "function", ppc_function, 0 }, | |
105 | { "lglobl", ppc_lglobl, 0 }, | |
106 | { "rename", ppc_rename, 0 }, | |
107 | { "stabx", ppc_stabx, 0 }, | |
108 | { "toc", ppc_toc, 0 }, | |
109 | #endif | |
110 | ||
111 | /* This pseudo-op is used even when not generating XCOFF output. */ | |
112 | { "tc", ppc_tc, 0 }, | |
113 | ||
114 | { NULL, NULL, 0 } | |
115 | }; | |
116 | \f | |
117 | /* Local variables. */ | |
118 | ||
1e147242 ILT |
119 | /* The type of processor we are assembling for. This is one or more |
120 | of the PPC_OPCODE flags defined in opcode/ppc.h. */ | |
882bdc69 ILT |
121 | static int ppc_cpu = 0; |
122 | ||
1e147242 ILT |
123 | /* The size of the processor we are assembling for. This is either |
124 | PPC_OPCODE_32 or PPC_OPCODE_64. */ | |
125 | static int ppc_size = PPC_OPCODE_32; | |
126 | ||
882bdc69 ILT |
127 | /* The endianness we are using. */ |
128 | static int ppc_big_endian = PPC_BIG_ENDIAN; | |
129 | ||
130 | /* Opcode hash table. */ | |
131 | static struct hash_control *ppc_hash; | |
132 | ||
133 | /* Macro hash table. */ | |
134 | static struct hash_control *ppc_macro_hash; | |
135 | ||
136 | #ifdef OBJ_COFF | |
137 | ||
138 | /* The RS/6000 assembler uses the .csect pseudo-op to generate code | |
139 | using a bunch of different sections. These assembler sections, | |
140 | however, are all encompassed within the .text or .data sections of | |
141 | the final output file. We handle this by using different | |
142 | subsegments within these main segments. */ | |
143 | ||
144 | /* Next subsegment to allocate within the .text segment. */ | |
145 | static subsegT ppc_text_subsegment = 2; | |
146 | ||
147 | /* Linked list of csects in the text section. */ | |
148 | static symbolS *ppc_text_csects; | |
149 | ||
150 | /* Next subsegment to allocate within the .data segment. */ | |
151 | static subsegT ppc_data_subsegment = 2; | |
152 | ||
153 | /* Linked list of csects in the data section. */ | |
154 | static symbolS *ppc_data_csects; | |
155 | ||
156 | /* The current csect. */ | |
157 | static symbolS *ppc_current_csect; | |
158 | ||
159 | /* The RS/6000 assembler uses a TOC which holds addresses of functions | |
160 | and variables. Symbols are put in the TOC with the .tc pseudo-op. | |
161 | A special relocation is used when accessing TOC entries. We handle | |
162 | the TOC as a subsegment within the .data segment. We set it up if | |
163 | we see a .toc pseudo-op, and save the csect symbol here. */ | |
164 | static symbolS *ppc_toc_csect; | |
165 | ||
166 | /* The first frag in the TOC subsegment. */ | |
167 | static fragS *ppc_toc_frag; | |
168 | ||
169 | /* The first frag in the first subsegment after the TOC in the .data | |
170 | segment. NULL if there are no subsegments after the TOC. */ | |
171 | static fragS *ppc_after_toc_frag; | |
172 | ||
173 | /* The COFF debugging section; set by md_begin. This is not the | |
174 | .debug section, but is instead the secret BFD section which will | |
175 | cause BFD to set the section number of a symbol to N_DEBUG. */ | |
176 | static asection *ppc_coff_debug_section; | |
177 | ||
178 | /* The size of the .debug section. */ | |
179 | static bfd_size_type ppc_debug_name_section_size; | |
180 | ||
181 | #endif /* OBJ_COFF */ | |
182 | \f | |
183 | /* This function is called when an option is found that is not | |
184 | recognized by the driver code. It should return 1 if the option is | |
185 | recognized here, 0 otherwise. */ | |
186 | ||
187 | int | |
188 | md_parse_option (arg_ptr, argc_ptr, argv_ptr) | |
189 | char **arg_ptr; | |
190 | int *argc_ptr; | |
191 | char ***argv_ptr; | |
192 | { | |
193 | /* -u means that any undefined symbols should be treated as | |
194 | external, which is the default for gas anyhow. */ | |
195 | if (strcmp (*arg_ptr, "u") == 0) | |
196 | { | |
197 | **arg_ptr = '\0'; | |
198 | return 1; | |
199 | } | |
200 | ||
201 | /* -mpwrx mean to assemble for the IBM POWER/2 (RIOS2). */ | |
202 | if (strcmp (*arg_ptr, "mpwrx") == 0) | |
203 | { | |
204 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2; | |
205 | **arg_ptr = '\0'; | |
206 | return 1; | |
207 | } | |
208 | ||
209 | /* -mpwr means to assemble for the IBM POWER (RIOS1). */ | |
210 | if (strcmp (*arg_ptr, "mpwr") == 0) | |
211 | { | |
212 | ppc_cpu = PPC_OPCODE_POWER; | |
213 | **arg_ptr = '\0'; | |
214 | return 1; | |
215 | } | |
216 | ||
217 | /* -m601 means to assemble for the Motorola PowerPC 601. FIXME: We | |
218 | ignore the option for now, but we should really use it to permit | |
219 | instructions defined on the 601 that are not part of the standard | |
220 | PowerPC architecture (mostly holdovers from the POWER). */ | |
221 | if (strcmp (*arg_ptr, "m601") == 0) | |
222 | { | |
223 | ppc_cpu = PPC_OPCODE_PPC | PPC_OPCODE_601; | |
224 | **arg_ptr = '\0'; | |
225 | return 1; | |
226 | } | |
227 | ||
228 | /* -mppc means to assemble for the Motorola PowerPC 603/604. */ | |
229 | if (strcmp (*arg_ptr, "mppc") == 0) | |
230 | { | |
231 | ppc_cpu = PPC_OPCODE_PPC; | |
232 | **arg_ptr = '\0'; | |
233 | return 1; | |
234 | } | |
235 | ||
236 | /* -many means to assemble for any architecture (PWR/PWRX/PPC). */ | |
237 | if (strcmp (*arg_ptr, "many") == 0) | |
238 | { | |
239 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2 | PPC_OPCODE_PPC; | |
240 | **arg_ptr = '\0'; | |
241 | return 1; | |
242 | } | |
243 | ||
244 | #ifdef OBJ_ELF | |
245 | /* -V: SVR4 argument to print version ID. */ | |
246 | if (strcmp (*arg_ptr, "V") == 0) | |
247 | { | |
248 | print_version_id (); | |
249 | **arg_ptr = '\0'; | |
250 | return 1; | |
251 | } | |
252 | ||
253 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
254 | should be emitted or not. FIXME: Not implemented. */ | |
255 | if (strcmp (*arg_ptr, "Qy") == 0 | |
256 | || strcmp (*arg_ptr, "Qn") == 0) | |
257 | { | |
258 | **arg_ptr = '\0'; | |
259 | return 1; | |
260 | } | |
261 | #endif | |
262 | ||
263 | return 0; | |
264 | } | |
265 | ||
266 | /* Set ppc_cpu if it is not already set. */ | |
267 | ||
268 | static void | |
269 | ppc_set_cpu () | |
270 | { | |
271 | const char *default_cpu = TARGET_CPU; | |
272 | ||
273 | if (ppc_cpu == 0) | |
274 | { | |
275 | if (strcmp (default_cpu, "rs6000") == 0) | |
276 | ppc_cpu = PPC_OPCODE_POWER; | |
277 | else if (strcmp (default_cpu, "powerpc") == 0) | |
278 | ppc_cpu = PPC_OPCODE_PPC; | |
279 | else | |
280 | abort (); | |
281 | } | |
282 | } | |
283 | ||
284 | /* Figure out the BFD architecture to use. */ | |
285 | ||
286 | enum bfd_architecture | |
287 | ppc_arch () | |
288 | { | |
289 | ppc_set_cpu (); | |
290 | ||
1e147242 | 291 | if ((ppc_cpu & PPC_OPCODE_PPC) != 0) |
882bdc69 | 292 | return bfd_arch_powerpc; |
1e147242 ILT |
293 | else if ((ppc_cpu & PPC_OPCODE_POWER) != 0) |
294 | return bfd_arch_rs6000; | |
882bdc69 ILT |
295 | else |
296 | abort (); | |
297 | } | |
298 | ||
299 | /* This function is called when the assembler starts up. It is called | |
300 | after the options have been parsed and the output file has been | |
301 | opened. */ | |
302 | ||
303 | void | |
304 | md_begin () | |
305 | { | |
306 | register const struct powerpc_opcode *op; | |
307 | const struct powerpc_opcode *op_end; | |
308 | const struct powerpc_macro *macro; | |
309 | const struct powerpc_macro *macro_end; | |
310 | ||
311 | ppc_set_cpu (); | |
312 | ||
313 | /* Insert the opcodes into a hash table. */ | |
314 | ppc_hash = hash_new (); | |
315 | ||
316 | op_end = powerpc_opcodes + powerpc_num_opcodes; | |
317 | for (op = powerpc_opcodes; op < op_end; op++) | |
318 | { | |
319 | know ((op->opcode & op->mask) == op->opcode); | |
320 | ||
1e147242 ILT |
321 | if ((op->flags & ppc_cpu) != 0 |
322 | && ((op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == 0 | |
323 | || (op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == ppc_size)) | |
882bdc69 ILT |
324 | { |
325 | const char *retval; | |
326 | ||
327 | retval = hash_insert (ppc_hash, op->name, (PTR) op); | |
328 | if (retval != (const char *) NULL) | |
329 | abort (); | |
330 | } | |
331 | } | |
332 | ||
333 | /* Insert the macros into a hash table. */ | |
334 | ppc_macro_hash = hash_new (); | |
335 | ||
336 | macro_end = powerpc_macros + powerpc_num_macros; | |
337 | for (macro = powerpc_macros; macro < macro_end; macro++) | |
338 | { | |
339 | if ((macro->flags & ppc_cpu) != 0) | |
340 | { | |
341 | const char *retval; | |
342 | ||
343 | retval = hash_insert (ppc_macro_hash, macro->name, (PTR) macro); | |
344 | if (retval != (const char *) NULL) | |
345 | abort (); | |
346 | } | |
347 | } | |
348 | ||
349 | /* Tell the main code what the endianness is. */ | |
350 | target_big_endian = ppc_big_endian; | |
351 | ||
352 | #ifdef OBJ_COFF | |
353 | ppc_coff_debug_section = coff_section_from_bfd_index (stdoutput, N_DEBUG); | |
354 | ||
355 | /* Create dummy symbols to serve as initial csects. This forces the | |
356 | text csects to precede the data csects. These symbols will not | |
357 | be output. */ | |
358 | ppc_text_csects = symbol_make ("dummy\001"); | |
359 | ppc_text_csects->sy_tc.within = ppc_text_csects; | |
360 | ppc_data_csects = symbol_make ("dummy\001"); | |
361 | ppc_data_csects->sy_tc.within = ppc_data_csects; | |
362 | #endif | |
363 | } | |
364 | ||
365 | /* Insert an operand value into an instruction. */ | |
366 | ||
367 | static unsigned long | |
368 | ppc_insert_operand (insn, operand, val, file, line) | |
369 | unsigned long insn; | |
370 | const struct powerpc_operand *operand; | |
371 | offsetT val; | |
372 | char *file; | |
373 | unsigned int line; | |
374 | { | |
375 | if (operand->bits != 32) | |
376 | { | |
377 | long min, max; | |
378 | offsetT test; | |
379 | ||
380 | if (operand->signedp) | |
381 | { | |
382 | /* This should be | |
383 | max = (1 << (operand->bits - 1)) - 1; | |
384 | Unfortunately, IBM has decided that all positive values | |
385 | are permitted even for a signed field, so we lose some | |
386 | bounds checking. */ | |
387 | max = (1 << operand->bits) - 1; | |
388 | min = - (1 << (operand->bits - 1)); | |
389 | } | |
390 | else | |
391 | { | |
392 | max = (1 << operand->bits) - 1; | |
393 | min = 0; | |
394 | } | |
395 | ||
396 | if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0) | |
397 | test = - val; | |
398 | else | |
399 | test = val; | |
400 | ||
401 | if (test < (offsetT) min || test > (offsetT) max) | |
402 | { | |
403 | const char *err = | |
404 | "operand out of range (%s not between %ld and %ld)"; | |
405 | char buf[100]; | |
406 | ||
407 | sprint_value (buf, test); | |
408 | if (file == (char *) NULL) | |
409 | as_warn (err, buf, min, max); | |
410 | else | |
411 | as_warn_where (file, line, err, buf, min, max); | |
412 | } | |
413 | } | |
414 | ||
415 | if (operand->insert) | |
416 | { | |
417 | const char *errmsg; | |
418 | ||
419 | errmsg = NULL; | |
420 | insn = (*operand->insert) (insn, (long) val, &errmsg); | |
421 | if (errmsg != (const char *) NULL) | |
422 | as_warn (errmsg); | |
423 | } | |
424 | else | |
425 | insn |= (((long) val & ((1 << operand->bits) - 1)) | |
426 | << operand->shift); | |
427 | ||
428 | return insn; | |
429 | } | |
430 | ||
431 | /* We need to keep a list of fixups. We can't simply generate them as | |
432 | we go, because that would require us to first create the frag, and | |
433 | that would screw up references to ``.''. */ | |
434 | ||
435 | struct ppc_fixup | |
436 | { | |
437 | expressionS exp; | |
438 | int opindex; | |
439 | }; | |
440 | ||
441 | #define MAX_INSN_FIXUPS (5) | |
442 | ||
443 | /* This routine is called for each instruction to be assembled. */ | |
444 | ||
445 | void | |
446 | md_assemble (str) | |
447 | char *str; | |
448 | { | |
449 | char *s; | |
450 | const struct powerpc_opcode *opcode; | |
451 | unsigned long insn; | |
452 | const unsigned char *opindex_ptr; | |
453 | int skip_optional; | |
454 | int need_paren; | |
455 | int next_opindex; | |
456 | struct ppc_fixup fixups[MAX_INSN_FIXUPS]; | |
457 | int fc; | |
458 | char *f; | |
459 | int i; | |
460 | ||
461 | /* Get the opcode. */ | |
462 | for (s = str; *s != '\0' && ! isspace (*s); s++) | |
463 | ; | |
464 | if (*s != '\0') | |
465 | *s++ = '\0'; | |
466 | ||
467 | /* Look up the opcode in the hash table. */ | |
468 | opcode = (const struct powerpc_opcode *) hash_find (ppc_hash, str); | |
469 | if (opcode == (const struct powerpc_opcode *) NULL) | |
470 | { | |
471 | const struct powerpc_macro *macro; | |
472 | ||
473 | macro = (const struct powerpc_macro *) hash_find (ppc_macro_hash, str); | |
474 | if (macro == (const struct powerpc_macro *) NULL) | |
475 | as_bad ("Unrecognized opcode: `%s'", str); | |
476 | else | |
477 | ppc_macro (s, macro); | |
478 | ||
479 | return; | |
480 | } | |
481 | ||
482 | insn = opcode->opcode; | |
483 | ||
484 | str = s; | |
485 | while (isspace (*str)) | |
486 | ++str; | |
487 | ||
488 | /* PowerPC operands are just expressions. The only real issue is | |
489 | that a few operand types are optional. All cases which might use | |
490 | an optional operand separate the operands only with commas (in | |
491 | some cases parentheses are used, as in ``lwz 1,0(1)'' but such | |
492 | cases never have optional operands). There is never more than | |
493 | one optional operand for an instruction. So, before we start | |
494 | seriously parsing the operands, we check to see if we have an | |
495 | optional operand, and, if we do, we count the number of commas to | |
496 | see whether the operand should be omitted. */ | |
497 | skip_optional = 0; | |
498 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
499 | { | |
500 | const struct powerpc_operand *operand; | |
501 | ||
502 | operand = &powerpc_operands[*opindex_ptr]; | |
503 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0) | |
504 | { | |
505 | unsigned int opcount; | |
506 | ||
507 | /* There is an optional operand. Count the number of | |
508 | commas in the input line. */ | |
509 | if (*str == '\0') | |
510 | opcount = 0; | |
511 | else | |
512 | { | |
513 | opcount = 1; | |
514 | s = str; | |
515 | while ((s = strchr (s, ',')) != (char *) NULL) | |
516 | { | |
517 | ++opcount; | |
518 | ++s; | |
519 | } | |
520 | } | |
521 | ||
522 | /* If there are fewer operands in the line then are called | |
523 | for by the instruction, we want to skip the optional | |
524 | operand. */ | |
525 | if (opcount < strlen (opcode->operands)) | |
526 | skip_optional = 1; | |
527 | ||
528 | break; | |
529 | } | |
530 | } | |
531 | ||
532 | /* Gather the operands. */ | |
533 | need_paren = 0; | |
534 | next_opindex = 0; | |
535 | fc = 0; | |
536 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
537 | { | |
538 | const struct powerpc_operand *operand; | |
539 | const char *errmsg; | |
540 | char *hold; | |
541 | expressionS ex; | |
542 | char endc; | |
543 | ||
544 | if (next_opindex == 0) | |
545 | operand = &powerpc_operands[*opindex_ptr]; | |
546 | else | |
547 | { | |
548 | operand = &powerpc_operands[next_opindex]; | |
549 | next_opindex = 0; | |
550 | } | |
551 | ||
552 | errmsg = NULL; | |
553 | ||
554 | /* If this is a fake operand, then we do not expect anything | |
555 | from the input. */ | |
556 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) | |
557 | { | |
558 | insn = (*operand->insert) (insn, 0L, &errmsg); | |
559 | if (errmsg != (const char *) NULL) | |
560 | as_warn (errmsg); | |
561 | continue; | |
562 | } | |
563 | ||
564 | /* If this is an optional operand, and we are skipping it, just | |
565 | insert a zero. */ | |
566 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 | |
567 | && skip_optional) | |
568 | { | |
569 | if (operand->insert) | |
570 | { | |
571 | insn = (*operand->insert) (insn, 0L, &errmsg); | |
572 | if (errmsg != (const char *) NULL) | |
573 | as_warn (errmsg); | |
574 | } | |
575 | if ((operand->flags & PPC_OPERAND_NEXT) != 0) | |
576 | next_opindex = *opindex_ptr + 1; | |
577 | continue; | |
578 | } | |
579 | ||
580 | /* Gather the operand. */ | |
581 | hold = input_line_pointer; | |
582 | input_line_pointer = str; | |
583 | expression (&ex); | |
584 | str = input_line_pointer; | |
585 | input_line_pointer = hold; | |
586 | ||
587 | if (ex.X_op == O_illegal) | |
588 | as_bad ("illegal operand"); | |
589 | else if (ex.X_op == O_absent) | |
590 | as_bad ("missing operand"); | |
591 | else if (ex.X_op == O_constant) | |
592 | insn = ppc_insert_operand (insn, operand, ex.X_add_number, | |
593 | (char *) NULL, 0); | |
594 | else | |
595 | { | |
596 | /* We need to generate a fixup for this expression. */ | |
597 | if (fc >= MAX_INSN_FIXUPS) | |
598 | as_fatal ("too many fixups"); | |
599 | fixups[fc].exp = ex; | |
600 | fixups[fc].opindex = *opindex_ptr; | |
601 | ++fc; | |
602 | } | |
603 | ||
604 | if (need_paren) | |
605 | { | |
606 | endc = ')'; | |
607 | need_paren = 0; | |
608 | } | |
609 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0) | |
610 | { | |
611 | endc = '('; | |
612 | need_paren = 1; | |
613 | } | |
614 | else | |
615 | endc = ','; | |
616 | ||
617 | /* The call to expression should have advanced str past any | |
618 | whitespace. */ | |
619 | if (*str != endc | |
620 | && (endc != ',' || *str != '\0')) | |
621 | { | |
622 | as_bad ("syntax error; found `%c' but expected `%c'", *str, endc); | |
623 | break; | |
624 | } | |
625 | ||
626 | if (*str != '\0') | |
627 | ++str; | |
628 | } | |
629 | ||
630 | while (isspace (*str)) | |
631 | ++str; | |
632 | ||
633 | if (*str != '\0') | |
634 | as_bad ("junk at end of line: `%s'", str); | |
635 | ||
636 | /* Write out the instruction. */ | |
637 | f = frag_more (4); | |
638 | md_number_to_chars (f, insn, 4); | |
639 | ||
640 | /* Create any fixups. At this point we do not use a | |
641 | bfd_reloc_code_real_type, but instead just use the operand index. | |
642 | This lets us easily handle fixups for any operand type, although | |
643 | that is admittedly not a very exciting feature. We pick a BFD | |
644 | reloc type in md_apply_fix. */ | |
645 | for (i = 0; i < fc; i++) | |
646 | { | |
647 | const struct powerpc_operand *operand; | |
648 | ||
649 | operand = &powerpc_operands[fixups[i].opindex]; | |
650 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, | |
651 | &fixups[i].exp, | |
652 | (operand->flags & PPC_OPERAND_RELATIVE) != 0, | |
653 | ((bfd_reloc_code_real_type) | |
654 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
655 | } | |
656 | } | |
657 | ||
658 | /* Handle a macro. Gather all the operands, transform them as | |
659 | described by the macro, and call md_assemble recursively. All the | |
660 | operands are separated by commas; we don't accept parentheses | |
661 | around operands here. */ | |
662 | ||
663 | static void | |
664 | ppc_macro (str, macro) | |
665 | char *str; | |
666 | const struct powerpc_macro *macro; | |
667 | { | |
668 | char *operands[10]; | |
669 | int count; | |
670 | char *s; | |
671 | unsigned int len; | |
672 | const char *format; | |
673 | int arg; | |
674 | char *send; | |
675 | char *complete; | |
676 | ||
677 | /* Gather the users operands into the operands array. */ | |
678 | count = 0; | |
679 | s = str; | |
680 | while (1) | |
681 | { | |
682 | if (count >= sizeof operands / sizeof operands[0]) | |
683 | break; | |
684 | operands[count++] = s; | |
685 | s = strchr (s, ','); | |
686 | if (s == (char *) NULL) | |
687 | break; | |
688 | *s++ = '\0'; | |
689 | } | |
690 | ||
691 | if (count != macro->operands) | |
692 | { | |
693 | as_bad ("wrong number of operands"); | |
694 | return; | |
695 | } | |
696 | ||
697 | /* Work out how large the string must be (the size is unbounded | |
698 | because it includes user input). */ | |
699 | len = 0; | |
700 | format = macro->format; | |
701 | while (*format != '\0') | |
702 | { | |
703 | if (*format != '%') | |
704 | { | |
705 | ++len; | |
706 | ++format; | |
707 | } | |
708 | else | |
709 | { | |
710 | arg = strtol (format + 1, &send, 10); | |
711 | know (send != format && arg >= 0 && arg < count); | |
712 | len += strlen (operands[arg]); | |
713 | format = send; | |
714 | } | |
715 | } | |
716 | ||
717 | /* Put the string together. */ | |
718 | complete = s = (char *) alloca (len + 1); | |
719 | format = macro->format; | |
720 | while (*format != '\0') | |
721 | { | |
722 | if (*format != '%') | |
723 | *s++ = *format++; | |
724 | else | |
725 | { | |
726 | arg = strtol (format + 1, &send, 10); | |
727 | strcpy (s, operands[arg]); | |
728 | s += strlen (s); | |
729 | format = send; | |
730 | } | |
731 | } | |
732 | *s = '\0'; | |
733 | ||
734 | /* Assemble the constructed instruction. */ | |
735 | md_assemble (complete); | |
736 | } | |
737 | \f | |
738 | /* Pseudo-op handling. */ | |
739 | ||
740 | /* The .byte pseudo-op. This is similar to the normal .byte | |
741 | pseudo-op, but it can also take a single ASCII string. */ | |
742 | ||
743 | static void | |
744 | ppc_byte (ignore) | |
745 | int ignore; | |
746 | { | |
747 | if (*input_line_pointer != '\"') | |
748 | { | |
749 | cons (1); | |
750 | return; | |
751 | } | |
752 | ||
753 | /* Gather characters. A real double quote is doubled. Unusual | |
754 | characters are not permitted. */ | |
755 | ++input_line_pointer; | |
756 | while (1) | |
757 | { | |
758 | char c; | |
759 | ||
760 | c = *input_line_pointer++; | |
761 | ||
762 | if (c == '\"') | |
763 | { | |
764 | if (*input_line_pointer != '\"') | |
765 | break; | |
766 | ++input_line_pointer; | |
767 | } | |
768 | ||
769 | FRAG_APPEND_1_CHAR (c); | |
770 | } | |
771 | ||
772 | demand_empty_rest_of_line (); | |
773 | } | |
774 | \f | |
775 | #ifdef OBJ_COFF | |
776 | ||
777 | /* XCOFF specific pseudo-op handling. */ | |
778 | ||
779 | /* The .comm and .lcomm pseudo-ops for XCOFF. XCOFF puts common | |
780 | symbols in the .bss segment as though they were local common | |
781 | symbols, and uses a different smclas. */ | |
782 | ||
783 | static void | |
784 | ppc_comm (lcomm) | |
785 | int lcomm; | |
786 | { | |
787 | asection *current_seg = now_seg; | |
788 | subsegT current_subseg = now_subseg; | |
789 | char *name; | |
790 | char endc; | |
791 | char *end_name; | |
792 | offsetT size; | |
793 | offsetT align; | |
794 | symbolS *lcomm_sym = NULL; | |
795 | symbolS *sym; | |
796 | char *pfrag; | |
797 | ||
798 | name = input_line_pointer; | |
799 | endc = get_symbol_end (); | |
800 | end_name = input_line_pointer; | |
801 | *end_name = endc; | |
802 | ||
803 | if (*input_line_pointer != ',') | |
804 | { | |
805 | as_bad ("missing size"); | |
806 | ignore_rest_of_line (); | |
807 | return; | |
808 | } | |
809 | ++input_line_pointer; | |
810 | ||
811 | size = get_absolute_expression (); | |
812 | if (size < 0) | |
813 | { | |
814 | as_bad ("negative size"); | |
815 | ignore_rest_of_line (); | |
816 | return; | |
817 | } | |
818 | ||
819 | if (! lcomm) | |
820 | { | |
821 | /* The third argument to .comm is the alignment. */ | |
822 | if (*input_line_pointer != ',') | |
823 | align = 3; | |
824 | else | |
825 | { | |
826 | ++input_line_pointer; | |
827 | align = get_absolute_expression (); | |
828 | if (align <= 0) | |
829 | { | |
830 | as_warn ("ignoring bad alignment"); | |
831 | align = 3; | |
832 | } | |
833 | } | |
834 | } | |
835 | else | |
836 | { | |
837 | char *lcomm_name; | |
838 | char lcomm_endc; | |
839 | ||
840 | if (size <= 1) | |
841 | align = 0; | |
842 | else if (size <= 2) | |
843 | align = 1; | |
844 | else if (size <= 4) | |
845 | align = 2; | |
846 | else | |
847 | align = 3; | |
848 | ||
849 | /* The third argument to .lcomm appears to be the real local | |
850 | common symbol to create. References to the symbol named in | |
851 | the first argument are turned into references to the third | |
852 | argument. */ | |
853 | if (*input_line_pointer != ',') | |
854 | { | |
855 | as_bad ("missing real symbol name"); | |
856 | ignore_rest_of_line (); | |
857 | return; | |
858 | } | |
859 | ++input_line_pointer; | |
860 | ||
861 | lcomm_name = input_line_pointer; | |
862 | lcomm_endc = get_symbol_end (); | |
863 | ||
864 | lcomm_sym = symbol_find_or_make (lcomm_name); | |
865 | ||
866 | *input_line_pointer = lcomm_endc; | |
867 | } | |
868 | ||
869 | *end_name = '\0'; | |
870 | sym = symbol_find_or_make (name); | |
871 | *end_name = endc; | |
872 | ||
873 | if (S_IS_DEFINED (sym) | |
874 | || S_GET_VALUE (sym) != 0) | |
875 | { | |
876 | as_bad ("attempt to redefine symbol"); | |
877 | ignore_rest_of_line (); | |
878 | return; | |
879 | } | |
880 | ||
881 | record_alignment (bss_section, align); | |
882 | ||
883 | if (! lcomm | |
884 | || ! S_IS_DEFINED (lcomm_sym)) | |
885 | { | |
886 | symbolS *def_sym; | |
887 | offsetT def_size; | |
888 | ||
889 | if (! lcomm) | |
890 | { | |
891 | def_sym = sym; | |
892 | def_size = size; | |
893 | S_SET_EXTERNAL (sym); | |
894 | } | |
895 | else | |
896 | { | |
897 | lcomm_sym->sy_tc.output = 1; | |
898 | def_sym = lcomm_sym; | |
899 | def_size = 0; | |
900 | } | |
901 | ||
902 | subseg_set (bss_section, 1); | |
903 | frag_align (align, 0); | |
904 | ||
905 | def_sym->sy_frag = frag_now; | |
906 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, def_sym, | |
907 | def_size, (char *) NULL); | |
908 | *pfrag = 0; | |
909 | S_SET_SEGMENT (def_sym, bss_section); | |
910 | def_sym->sy_tc.align = align; | |
911 | } | |
912 | else if (lcomm) | |
913 | { | |
914 | /* Align the size of lcomm_sym. */ | |
915 | lcomm_sym->sy_frag->fr_offset = | |
916 | ((lcomm_sym->sy_frag->fr_offset + (1 << align) - 1) | |
917 | &~ ((1 << align) - 1)); | |
918 | if (align > lcomm_sym->sy_tc.align) | |
919 | lcomm_sym->sy_tc.align = align; | |
920 | } | |
921 | ||
922 | if (lcomm) | |
923 | { | |
924 | /* Make sym an offset from lcomm_sym. */ | |
925 | S_SET_SEGMENT (sym, bss_section); | |
926 | sym->sy_frag = lcomm_sym->sy_frag; | |
927 | S_SET_VALUE (sym, lcomm_sym->sy_frag->fr_offset); | |
928 | lcomm_sym->sy_frag->fr_offset += size; | |
929 | } | |
930 | ||
931 | subseg_set (current_seg, current_subseg); | |
932 | ||
933 | demand_empty_rest_of_line (); | |
934 | } | |
935 | ||
936 | /* The .csect pseudo-op. This switches us into a different | |
937 | subsegment. The first argument is a symbol whose value is the | |
938 | start of the .csect. In COFF, csect symbols get special aux | |
939 | entries defined by the x_csect field of union internal_auxent. The | |
940 | optional second argument is the alignment (the default is 2). */ | |
941 | ||
942 | static void | |
943 | ppc_csect (ignore) | |
944 | int ignore; | |
945 | { | |
946 | char *name; | |
947 | char endc; | |
948 | symbolS *sym; | |
949 | ||
950 | name = input_line_pointer; | |
951 | endc = get_symbol_end (); | |
952 | ||
953 | sym = symbol_find_or_make (name); | |
954 | ||
955 | *input_line_pointer = endc; | |
956 | ||
957 | if (S_IS_DEFINED (sym)) | |
958 | subseg_set (S_GET_SEGMENT (sym), sym->sy_tc.subseg); | |
959 | else | |
960 | { | |
961 | symbolS **list_ptr; | |
962 | int after_toc; | |
963 | symbolS *list; | |
964 | ||
965 | /* This is a new csect. We need to look at the symbol class to | |
966 | figure out whether it should go in the text section or the | |
967 | data section. */ | |
968 | after_toc = 0; | |
969 | switch (sym->sy_tc.class) | |
970 | { | |
971 | case XMC_PR: | |
972 | case XMC_RO: | |
973 | case XMC_DB: | |
974 | case XMC_GL: | |
975 | case XMC_XO: | |
976 | case XMC_SV: | |
977 | case XMC_TI: | |
978 | case XMC_TB: | |
979 | S_SET_SEGMENT (sym, text_section); | |
980 | sym->sy_tc.subseg = ppc_text_subsegment; | |
981 | ++ppc_text_subsegment; | |
982 | list_ptr = &ppc_text_csects; | |
983 | break; | |
984 | case XMC_RW: | |
985 | case XMC_TC0: | |
986 | case XMC_TC: | |
987 | case XMC_DS: | |
988 | case XMC_UA: | |
989 | case XMC_BS: | |
990 | case XMC_UC: | |
991 | if (ppc_toc_csect->sy_tc.subseg + 1 == ppc_data_subsegment) | |
992 | after_toc = 1; | |
993 | S_SET_SEGMENT (sym, data_section); | |
994 | sym->sy_tc.subseg = ppc_data_subsegment; | |
995 | ++ppc_data_subsegment; | |
996 | list_ptr = &ppc_data_csects; | |
997 | break; | |
998 | default: | |
999 | abort (); | |
1000 | } | |
1001 | ||
1002 | subseg_new (segment_name (S_GET_SEGMENT (sym)), sym->sy_tc.subseg); | |
1003 | if (after_toc) | |
1004 | ppc_after_toc_frag = frag_now; | |
1005 | ||
1006 | sym->sy_frag = frag_now; | |
1007 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1008 | ||
1009 | sym->sy_tc.align = 2; | |
1010 | sym->sy_tc.output = 1; | |
1011 | sym->sy_tc.within = sym; | |
1012 | ||
1013 | for (list = *list_ptr; | |
1014 | list->sy_tc.next != (symbolS *) NULL; | |
1015 | list = list->sy_tc.next) | |
1016 | ; | |
1017 | list->sy_tc.next = sym; | |
1018 | ||
1019 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1020 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); | |
1021 | } | |
1022 | ||
1023 | if (*input_line_pointer == ',') | |
1024 | { | |
1025 | ++input_line_pointer; | |
1026 | sym->sy_tc.align = get_absolute_expression (); | |
1027 | } | |
1028 | ||
1029 | ppc_current_csect = sym; | |
1030 | ||
1031 | demand_empty_rest_of_line (); | |
1032 | } | |
1033 | ||
1034 | /* The .extern pseudo-op. We create an undefined symbol. */ | |
1035 | ||
1036 | static void | |
1037 | ppc_extern (ignore) | |
1038 | int ignore; | |
1039 | { | |
1040 | char *name; | |
1041 | char endc; | |
1042 | ||
1043 | name = input_line_pointer; | |
1044 | endc = get_symbol_end (); | |
1045 | ||
1046 | (void) symbol_find_or_make (name); | |
1047 | ||
1048 | *input_line_pointer = endc; | |
1049 | ||
1050 | demand_empty_rest_of_line (); | |
1051 | } | |
1052 | ||
1053 | /* The .lglobl pseudo-op. I think the RS/6000 assembler only needs | |
1054 | this because it can't handle undefined symbols. I think we can | |
1055 | just ignore it. */ | |
1056 | ||
1057 | static void | |
1058 | ppc_lglobl (ignore) | |
1059 | int ignore; | |
1060 | { | |
1061 | s_ignore (0); | |
1062 | } | |
1063 | ||
1064 | /* The .rename pseudo-op. The RS/6000 assembler can rename symbols, | |
1065 | although I don't know why it bothers. */ | |
1066 | ||
1067 | static void | |
1068 | ppc_rename (ignore) | |
1069 | int ignore; | |
1070 | { | |
1071 | char *name; | |
1072 | char endc; | |
1073 | symbolS *sym; | |
1074 | int len; | |
1075 | ||
1076 | name = input_line_pointer; | |
1077 | endc = get_symbol_end (); | |
1078 | ||
1079 | sym = symbol_find_or_make (name); | |
1080 | ||
1081 | *input_line_pointer = endc; | |
1082 | ||
1083 | if (*input_line_pointer != ',') | |
1084 | { | |
1085 | as_bad ("missing rename string"); | |
1086 | ignore_rest_of_line (); | |
1087 | return; | |
1088 | } | |
1089 | ++input_line_pointer; | |
1090 | ||
1091 | sym->sy_tc.real_name = demand_copy_C_string (&len); | |
1092 | ||
1093 | demand_empty_rest_of_line (); | |
1094 | } | |
1095 | ||
1096 | /* The .stabx pseudo-op. This is similar to a normal .stabs | |
1097 | pseudo-op, but slightly different. A sample is | |
1098 | .stabx "main:F-1",.main,142,0 | |
1099 | The first argument is the symbol name to create. The second is the | |
1100 | value, and the third is the storage class. The fourth seems to be | |
1101 | always zero, and I am assuming it is the type. */ | |
1102 | ||
1103 | static void | |
1104 | ppc_stabx (ignore) | |
1105 | int ignore; | |
1106 | { | |
1107 | char *name; | |
1108 | int len; | |
1109 | symbolS *sym; | |
1110 | ||
1111 | name = demand_copy_C_string (&len); | |
1112 | ||
1113 | if (*input_line_pointer != ',') | |
1114 | { | |
1115 | as_bad ("missing value"); | |
1116 | return; | |
1117 | } | |
1118 | ++input_line_pointer; | |
1119 | ||
1120 | sym = symbol_make (name); | |
1121 | pseudo_set (sym); | |
1122 | ||
1123 | S_SET_SEGMENT (sym, ppc_coff_debug_section); | |
1124 | sym->bsym->flags |= BSF_DEBUGGING; | |
1125 | ||
1126 | if (*input_line_pointer != ',') | |
1127 | { | |
1128 | as_bad ("missing class"); | |
1129 | return; | |
1130 | } | |
1131 | ++input_line_pointer; | |
1132 | ||
1133 | S_SET_STORAGE_CLASS (sym, get_absolute_expression ()); | |
1134 | ||
1135 | if (*input_line_pointer != ',') | |
1136 | { | |
1137 | as_bad ("missing type"); | |
1138 | return; | |
1139 | } | |
1140 | ++input_line_pointer; | |
1141 | ||
1142 | S_SET_DATA_TYPE (sym, get_absolute_expression ()); | |
1143 | ||
1144 | sym->sy_tc.output = 1; | |
1145 | ppc_frob_label (sym); | |
1146 | ||
1147 | if (strlen (name) > SYMNMLEN) | |
1148 | { | |
1149 | /* For some reason, each name is preceded by a two byte length | |
1150 | and followed by a null byte. */ | |
1151 | ppc_debug_name_section_size += strlen (name) + 3; | |
1152 | } | |
1153 | ||
1154 | demand_empty_rest_of_line (); | |
1155 | } | |
1156 | ||
1157 | /* The .function pseudo-op. This takes several arguments. The first | |
1158 | argument seems to be the external name of the symbol. The second | |
1159 | argment seems to be the label for the start of the function. gcc | |
1160 | uses the same name for both. I have no idea what the third and | |
1161 | fourth arguments are meant to be. The optional fifth argument is | |
1162 | an expression for the size of the function. In COFF this symbol | |
1163 | gets an aux entry like that used for a csect. */ | |
1164 | ||
1165 | static void | |
1166 | ppc_function (ignore) | |
1167 | int ignore; | |
1168 | { | |
1169 | char *name; | |
1170 | char endc; | |
1171 | char *s; | |
1172 | symbolS *ext_sym; | |
1173 | symbolS *lab_sym; | |
1174 | ||
1175 | name = input_line_pointer; | |
1176 | endc = get_symbol_end (); | |
1177 | ||
1178 | /* Ignore any [PR] suffix. */ | |
1179 | name = ppc_canonicalize_symbol_name (name); | |
1180 | s = strchr (name, '['); | |
1181 | if (s != (char *) NULL | |
1182 | && strcmp (s + 1, "PR]") == 0) | |
1183 | *s = '\0'; | |
1184 | ||
1185 | ext_sym = symbol_find_or_make (name); | |
1186 | ||
1187 | *input_line_pointer = endc; | |
1188 | ||
1189 | if (*input_line_pointer != ',') | |
1190 | { | |
1191 | as_bad ("missing symbol name"); | |
1192 | ignore_rest_of_line (); | |
1193 | return; | |
1194 | } | |
1195 | ++input_line_pointer; | |
1196 | ||
1197 | name = input_line_pointer; | |
1198 | endc = get_symbol_end (); | |
1199 | ||
1200 | lab_sym = symbol_find_or_make (name); | |
1201 | ||
1202 | *input_line_pointer = endc; | |
1203 | ||
1204 | if (ext_sym != lab_sym) | |
1205 | { | |
1206 | ext_sym->sy_value.X_op = O_symbol; | |
1207 | ext_sym->sy_value.X_add_symbol = lab_sym; | |
1208 | ext_sym->sy_value.X_op_symbol = NULL; | |
1209 | ext_sym->sy_value.X_add_number = 0; | |
1210 | } | |
1211 | ||
1212 | if (ext_sym->sy_tc.class == -1) | |
1213 | ext_sym->sy_tc.class = XMC_PR; | |
1214 | ext_sym->sy_tc.output = 1; | |
1215 | ||
1216 | if (*input_line_pointer == ',') | |
1217 | { | |
1218 | expressionS ignore; | |
1219 | ||
1220 | /* Ignore the third argument. */ | |
1221 | ++input_line_pointer; | |
1222 | expression (&ignore); | |
1223 | if (*input_line_pointer == ',') | |
1224 | { | |
1225 | /* Ignore the fourth argument. */ | |
1226 | ++input_line_pointer; | |
1227 | expression (&ignore); | |
1228 | if (*input_line_pointer == ',') | |
1229 | { | |
1230 | /* The fifth argument is the function size. */ | |
1231 | ++input_line_pointer; | |
1232 | ext_sym->sy_tc.size = symbol_new ("L0\001", | |
1233 | absolute_section, | |
1234 | (valueT) 0, | |
1235 | &zero_address_frag); | |
1236 | pseudo_set (ext_sym->sy_tc.size); | |
1237 | } | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | S_SET_DATA_TYPE (ext_sym, DT_FCN << N_BTSHFT); | |
1242 | SF_SET_FUNCTION (ext_sym); | |
1243 | SF_SET_PROCESS (ext_sym); | |
1244 | coff_add_linesym (ext_sym); | |
1245 | ||
1246 | demand_empty_rest_of_line (); | |
1247 | } | |
1248 | ||
1249 | /* The .bf pseudo-op. This is just like a COFF C_FCN symbol named | |
1250 | ".bf". */ | |
1251 | ||
1252 | static void | |
1253 | ppc_bf (ignore) | |
1254 | int ignore; | |
1255 | { | |
1256 | symbolS *sym; | |
1257 | unsigned int base; | |
1258 | ||
1259 | sym = symbol_make (".bf"); | |
1260 | S_SET_SEGMENT (sym, text_section); | |
1261 | sym->sy_frag = frag_now; | |
1262 | S_SET_VALUE (sym, frag_now_fix ()); | |
1263 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1264 | ||
1265 | base = get_absolute_expression (); | |
1266 | if (base > coff_line_base) | |
1267 | coff_line_base = base; | |
1268 | ||
1269 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1270 | SA_SET_SYM_LNNO (sym, coff_line_base); | |
1271 | ||
1272 | sym->sy_tc.output = 1; | |
1273 | ||
1274 | ppc_frob_label (sym); | |
1275 | ||
1276 | demand_empty_rest_of_line (); | |
1277 | } | |
1278 | ||
1279 | /* The .ef pseudo-op. This is just like a COFF C_FCN symbol named | |
1280 | ".ef", except that the line number is absolute, not relative to the | |
1281 | most recent ".bf" symbol. */ | |
1282 | ||
1283 | static void | |
1284 | ppc_ef (ignore) | |
1285 | int ignore; | |
1286 | { | |
1287 | symbolS *sym; | |
1288 | ||
1289 | sym = symbol_make (".ef"); | |
1290 | S_SET_SEGMENT (sym, text_section); | |
1291 | sym->sy_frag = frag_now; | |
1292 | S_SET_VALUE (sym, frag_now_fix ()); | |
1293 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1294 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1295 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1296 | sym->sy_tc.output = 1; | |
1297 | ||
1298 | ppc_frob_label (sym); | |
1299 | ||
1300 | demand_empty_rest_of_line (); | |
1301 | } | |
1302 | ||
1303 | /* The .bi and .ei pseudo-ops. These take a string argument and | |
1304 | generates a C_BINCL or C_EINCL symbol, which goes at the start of | |
1305 | the symbol list. */ | |
1306 | ||
1307 | static void | |
1308 | ppc_biei (ei) | |
1309 | int ei; | |
1310 | { | |
1311 | char *name; | |
1312 | int len; | |
1313 | symbolS *sym; | |
1314 | symbolS *look; | |
1315 | ||
1316 | name = demand_copy_C_string (&len); | |
1317 | ||
1318 | sym = symbol_make (name); | |
1319 | S_SET_SEGMENT (sym, ppc_coff_debug_section); | |
1320 | sym->bsym->flags |= BSF_DEBUGGING; | |
1321 | ||
1322 | /* FIXME: The value of the .bi or .ei symbol is supposed to be the | |
1323 | offset in the file to the line number entry to use. That is | |
1324 | quite difficult to implement using BFD, so I'm just not doing it. | |
1325 | Sorry. Please add it if you can figure out how. Note that this | |
1326 | approach is the only way to support multiple files in COFF, since | |
1327 | line numbers are associated with function symbols. Note further | |
1328 | that it still doesn't work, since the line numbers are stored as | |
1329 | offsets from a base line number. */ | |
1330 | ||
1331 | S_SET_STORAGE_CLASS (sym, ei ? C_EINCL : C_BINCL); | |
1332 | sym->sy_tc.output = 1; | |
1333 | ||
1334 | for (look = symbol_rootP; | |
1335 | (look != (symbolS *) NULL | |
1336 | && (S_GET_STORAGE_CLASS (look) == C_FILE | |
1337 | || S_GET_STORAGE_CLASS (look) == C_BINCL | |
1338 | || S_GET_STORAGE_CLASS (look) == C_EINCL)); | |
1339 | look = symbol_next (look)) | |
1340 | ; | |
1341 | if (look != (symbolS *) NULL) | |
1342 | { | |
1343 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1344 | symbol_insert (sym, look, &symbol_rootP, &symbol_lastP); | |
1345 | } | |
1346 | ||
1347 | demand_empty_rest_of_line (); | |
1348 | } | |
1349 | ||
1350 | /* The .bs pseudo-op. This generates a C_BSTAT symbol named ".bs". | |
1351 | There is one argument, which is a csect symbol. The value of the | |
1352 | .bs symbol is the index of this csect symbol. */ | |
1353 | ||
1354 | static void | |
1355 | ppc_bs (ignore) | |
1356 | int ignore; | |
1357 | { | |
1358 | char *name; | |
1359 | char endc; | |
1360 | symbolS *csect; | |
1361 | symbolS *sym; | |
1362 | ||
1363 | name = input_line_pointer; | |
1364 | endc = get_symbol_end (); | |
1365 | ||
1366 | csect = symbol_find_or_make (name); | |
1367 | ||
1368 | *input_line_pointer = endc; | |
1369 | ||
1370 | sym = symbol_make (".bs"); | |
1371 | S_SET_SEGMENT (sym, now_seg); | |
1372 | S_SET_STORAGE_CLASS (sym, C_BSTAT); | |
1373 | sym->bsym->flags |= BSF_DEBUGGING; | |
1374 | sym->sy_tc.output = 1; | |
1375 | ||
1376 | sym->sy_tc.within = csect; | |
1377 | ||
1378 | ppc_frob_label (sym); | |
1379 | ||
1380 | demand_empty_rest_of_line (); | |
1381 | } | |
1382 | ||
1383 | /* The .es pseudo-op. Generate a C_ESTART symbol named .es. */ | |
1384 | ||
1385 | static void | |
1386 | ppc_es (ignore) | |
1387 | int ignore; | |
1388 | { | |
1389 | symbolS *sym; | |
1390 | ||
1391 | sym = symbol_make (".es"); | |
1392 | S_SET_SEGMENT (sym, now_seg); | |
1393 | S_SET_STORAGE_CLASS (sym, C_ESTAT); | |
1394 | sym->bsym->flags |= BSF_DEBUGGING; | |
1395 | sym->sy_tc.output = 1; | |
1396 | ||
1397 | ppc_frob_label (sym); | |
1398 | ||
1399 | demand_empty_rest_of_line (); | |
1400 | } | |
1401 | ||
1402 | /* The .bb pseudo-op. Generate a C_BLOCK symbol named .bb, with a | |
1403 | line number. */ | |
1404 | ||
1405 | static void | |
1406 | ppc_bb (ignore) | |
1407 | int ignore; | |
1408 | { | |
1409 | symbolS *sym; | |
1410 | ||
1411 | sym = symbol_make (".bb"); | |
1412 | S_SET_SEGMENT (sym, text_section); | |
1413 | sym->sy_frag = frag_now; | |
1414 | S_SET_VALUE (sym, frag_now_fix ()); | |
1415 | S_SET_STORAGE_CLASS (sym, C_BLOCK); | |
1416 | ||
1417 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1418 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1419 | ||
1420 | sym->sy_tc.output = 1; | |
1421 | ||
1422 | ppc_frob_label (sym); | |
1423 | ||
1424 | demand_empty_rest_of_line (); | |
1425 | } | |
1426 | ||
1427 | /* The .eb pseudo-op. Generate a C_BLOCK symbol named .eb, with a | |
1428 | line number. */ | |
1429 | ||
1430 | static void | |
1431 | ppc_eb (ignore) | |
1432 | int ignore; | |
1433 | { | |
1434 | symbolS *sym; | |
1435 | ||
1436 | sym = symbol_make (".eb"); | |
1437 | S_SET_SEGMENT (sym, text_section); | |
1438 | sym->sy_frag = frag_now; | |
1439 | S_SET_VALUE (sym, frag_now_fix ()); | |
1440 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1441 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1442 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1443 | sym->sy_tc.output = 1; | |
1444 | ||
1445 | ppc_frob_label (sym); | |
1446 | ||
1447 | demand_empty_rest_of_line (); | |
1448 | } | |
1449 | ||
1450 | /* The .toc pseudo-op. Switch to the .toc subsegment. */ | |
1451 | ||
1452 | static void | |
1453 | ppc_toc (ignore) | |
1454 | int ignore; | |
1455 | { | |
1456 | if (ppc_toc_csect != (symbolS *) NULL) | |
1457 | subseg_set (data_section, ppc_toc_csect->sy_tc.subseg); | |
1458 | else | |
1459 | { | |
1460 | subsegT subseg; | |
1461 | symbolS *sym; | |
1462 | symbolS *list; | |
1463 | ||
1464 | subseg = ppc_data_subsegment; | |
1465 | ++ppc_data_subsegment; | |
1466 | ||
1467 | subseg_new (segment_name (data_section), subseg); | |
1468 | ppc_toc_frag = frag_now; | |
1469 | ||
1470 | sym = symbol_find_or_make ("TOC[TC0]"); | |
1471 | sym->sy_frag = frag_now; | |
1472 | S_SET_SEGMENT (sym, data_section); | |
1473 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1474 | sym->sy_tc.subseg = subseg; | |
1475 | sym->sy_tc.output = 1; | |
1476 | sym->sy_tc.within = sym; | |
1477 | ||
1478 | ppc_toc_csect = sym; | |
1479 | ||
1480 | for (list = ppc_data_csects; | |
1481 | list->sy_tc.next != (symbolS *) NULL; | |
1482 | list = list->sy_tc.next) | |
1483 | ; | |
1484 | list->sy_tc.next = sym; | |
1485 | ||
1486 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1487 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); | |
1488 | } | |
1489 | ||
1490 | ppc_current_csect = ppc_toc_csect; | |
1491 | ||
1492 | demand_empty_rest_of_line (); | |
1493 | } | |
1494 | ||
1495 | #endif /* OBJ_COFF */ | |
1496 | \f | |
1497 | /* The .tc pseudo-op. This is used when generating either XCOFF or | |
1498 | ELF. This takes two or more arguments. | |
1499 | ||
1500 | When generating XCOFF output, the first argument is the name to | |
1501 | give to this location in the toc; this will be a symbol with class | |
1502 | TC. The rest of the arguments are 4 byte values to actually put at | |
1503 | this location in the TOC; often there is just one more argument, a | |
1504 | relocateable symbol reference. | |
1505 | ||
1506 | When not generating XCOFF output, the arguments are the same, but | |
1507 | the first argument is simply ignored. */ | |
1508 | ||
1509 | static void | |
1510 | ppc_tc (ignore) | |
1511 | int ignore; | |
1512 | { | |
1513 | #ifdef OBJ_COFF | |
1514 | ||
1515 | /* Define the TOC symbol name. */ | |
1516 | { | |
1517 | char *name; | |
1518 | char endc; | |
1519 | symbolS *sym; | |
1520 | ||
1521 | if (ppc_toc_csect == (symbolS *) NULL | |
1522 | || ppc_toc_csect != ppc_current_csect) | |
1523 | { | |
1524 | as_bad (".tc not in .toc section"); | |
1525 | ignore_rest_of_line (); | |
1526 | return; | |
1527 | } | |
1528 | ||
1529 | name = input_line_pointer; | |
1530 | endc = get_symbol_end (); | |
1531 | ||
1532 | sym = symbol_find_or_make (name); | |
1533 | ||
1534 | *input_line_pointer = endc; | |
1535 | ||
1536 | if (S_IS_DEFINED (sym)) | |
1537 | { | |
1538 | symbolS *label; | |
1539 | ||
1540 | label = ppc_current_csect->sy_tc.within; | |
1541 | if (label->sy_tc.class != XMC_TC0) | |
1542 | { | |
1543 | as_warn (".tc with no label"); | |
1544 | ignore_rest_of_line (); | |
1545 | return; | |
1546 | } | |
1547 | ||
1548 | S_SET_SEGMENT (label, S_GET_SEGMENT (sym)); | |
1549 | label->sy_frag = sym->sy_frag; | |
1550 | S_SET_VALUE (label, S_GET_VALUE (sym)); | |
1551 | ||
1552 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1553 | ++input_line_pointer; | |
1554 | ||
1555 | return; | |
1556 | } | |
1557 | ||
1558 | S_SET_SEGMENT (sym, now_seg); | |
1559 | sym->sy_frag = frag_now; | |
1560 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1561 | sym->sy_tc.class = XMC_TC; | |
1562 | sym->sy_tc.output = 1; | |
1563 | ||
1564 | ppc_frob_label (sym); | |
1565 | } | |
1566 | ||
1567 | #else /* ! defined (OBJ_COFF) */ | |
1568 | ||
1569 | /* Skip the TOC symbol name. */ | |
1570 | while (is_part_of_name (*input_line_pointer) | |
1571 | || *input_line_pointer == '[' | |
1572 | || *input_line_pointer == ']' | |
1573 | || *input_line_pointer == '{' | |
1574 | || *input_line_pointer == '}') | |
1575 | ++input_line_pointer; | |
1576 | ||
1577 | #endif /* ! defined (OBJ_COFF) */ | |
1578 | ||
1579 | if (*input_line_pointer != ',') | |
1580 | demand_empty_rest_of_line (); | |
1581 | else | |
1582 | { | |
1583 | ++input_line_pointer; | |
1584 | cons (4); | |
1585 | } | |
1586 | } | |
1587 | \f | |
1588 | #ifdef OBJ_COFF | |
1589 | ||
1590 | /* XCOFF specific symbol and file handling. */ | |
1591 | ||
1592 | /* Canonicalize the symbol name. We use the to force the suffix, if | |
1593 | any, to use square brackets, and to be in upper case. */ | |
1594 | ||
1595 | char * | |
1596 | ppc_canonicalize_symbol_name (name) | |
1597 | char *name; | |
1598 | { | |
1599 | char *s; | |
1600 | ||
1601 | for (s = name; *s != '\0' && *s != '{' && *s != '['; s++) | |
1602 | ; | |
1603 | if (*s != '\0') | |
1604 | { | |
1605 | char brac; | |
1606 | ||
1607 | if (*s == '[') | |
1608 | brac = ']'; | |
1609 | else | |
1610 | { | |
1611 | *s = '['; | |
1612 | brac = '}'; | |
1613 | } | |
1614 | ||
1615 | for (s++; *s != '\0' && *s != brac; s++) | |
1616 | if (islower (*s)) | |
1617 | *s = toupper (*s); | |
1618 | ||
1619 | if (*s == '\0' || s[1] != '\0') | |
1620 | as_bad ("bad symbol suffix"); | |
1621 | ||
1622 | *s = ']'; | |
1623 | } | |
1624 | ||
1625 | return name; | |
1626 | } | |
1627 | ||
1628 | /* Set the class of a symbol based on the suffix, if any. This is | |
1629 | called whenever a new symbol is created. */ | |
1630 | ||
1631 | void | |
1632 | ppc_symbol_new_hook (sym) | |
1633 | symbolS *sym; | |
1634 | { | |
1635 | const char *s; | |
1636 | ||
1637 | sym->sy_tc.next = NULL; | |
1638 | sym->sy_tc.output = 0; | |
1639 | sym->sy_tc.class = -1; | |
1640 | sym->sy_tc.real_name = NULL; | |
1641 | sym->sy_tc.subseg = 0; | |
1642 | sym->sy_tc.align = 0; | |
1643 | sym->sy_tc.size = NULL; | |
1644 | sym->sy_tc.within = NULL; | |
1645 | ||
1646 | s = strchr (S_GET_NAME (sym), '['); | |
1647 | if (s == (const char *) NULL) | |
1648 | { | |
1649 | /* There is no suffix. */ | |
1650 | return; | |
1651 | } | |
1652 | ||
1653 | ++s; | |
1654 | ||
1655 | switch (s[0]) | |
1656 | { | |
1657 | case 'B': | |
1658 | if (strcmp (s, "BS]") == 0) | |
1659 | sym->sy_tc.class = XMC_BS; | |
1660 | break; | |
1661 | case 'D': | |
1662 | if (strcmp (s, "DB]") == 0) | |
1663 | sym->sy_tc.class = XMC_DB; | |
1664 | else if (strcmp (s, "DS]") == 0) | |
1665 | sym->sy_tc.class = XMC_DS; | |
1666 | break; | |
1667 | case 'G': | |
1668 | if (strcmp (s, "GL]") == 0) | |
1669 | sym->sy_tc.class = XMC_GL; | |
1670 | break; | |
1671 | case 'P': | |
1672 | if (strcmp (s, "PR]") == 0) | |
1673 | sym->sy_tc.class = XMC_PR; | |
1674 | break; | |
1675 | case 'R': | |
1676 | if (strcmp (s, "RO]") == 0) | |
1677 | sym->sy_tc.class = XMC_RO; | |
1678 | else if (strcmp (s, "RW]") == 0) | |
1679 | sym->sy_tc.class = XMC_RW; | |
1680 | break; | |
1681 | case 'S': | |
1682 | if (strcmp (s, "SV]") == 0) | |
1683 | sym->sy_tc.class = XMC_SV; | |
1684 | break; | |
1685 | case 'T': | |
1686 | if (strcmp (s, "TC]") == 0) | |
1687 | sym->sy_tc.class = XMC_TC; | |
1688 | else if (strcmp (s, "TI]") == 0) | |
1689 | sym->sy_tc.class = XMC_TI; | |
1690 | else if (strcmp (s, "TB]") == 0) | |
1691 | sym->sy_tc.class = XMC_TB; | |
1692 | else if (strcmp (s, "TC0]") == 0) | |
1693 | sym->sy_tc.class = XMC_TC0; | |
1694 | break; | |
1695 | case 'U': | |
1696 | if (strcmp (s, "UA]") == 0) | |
1697 | sym->sy_tc.class = XMC_UA; | |
1698 | else if (strcmp (s, "UC]") == 0) | |
1699 | sym->sy_tc.class = XMC_UC; | |
1700 | break; | |
1701 | case 'X': | |
1702 | if (strcmp (s, "XO]") == 0) | |
1703 | sym->sy_tc.class = XMC_XO; | |
1704 | break; | |
1705 | } | |
1706 | ||
1707 | if (sym->sy_tc.class == -1) | |
1708 | as_bad ("Unrecognized symbol suffix"); | |
1709 | } | |
1710 | ||
1711 | /* Set the class of a label based on where it is defined. This | |
1712 | handles symbols without suffixes. Also, move the symbol so that it | |
1713 | follows the csect symbol. */ | |
1714 | ||
1715 | void | |
1716 | ppc_frob_label (sym) | |
1717 | symbolS *sym; | |
1718 | { | |
1719 | if (ppc_current_csect != (symbolS *) NULL) | |
1720 | { | |
1721 | if (sym->sy_tc.class == -1) | |
1722 | sym->sy_tc.class = ppc_current_csect->sy_tc.class; | |
1723 | ||
1724 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1725 | symbol_append (sym, ppc_current_csect->sy_tc.within, &symbol_rootP, | |
1726 | &symbol_lastP); | |
1727 | ppc_current_csect->sy_tc.within = sym; | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | /* Change the name of a symbol just before writing it out. Set the | |
1732 | real name if the .rename pseudo-op was used. Otherwise, remove any | |
1733 | class suffix. Return 1 if the symbol should not be included in the | |
1734 | symbol table. */ | |
1735 | ||
1736 | int | |
1737 | ppc_frob_symbol (sym) | |
1738 | symbolS *sym; | |
1739 | { | |
1740 | static symbolS *ppc_last_function; | |
1741 | static symbolS *set_end; | |
1742 | ||
1743 | /* Discard symbols that should not be included in the output symbol | |
1744 | table. */ | |
1745 | if (! sym->sy_used_in_reloc | |
1746 | && ((sym->bsym->flags & BSF_SECTION_SYM) != 0 | |
1747 | || (! S_IS_EXTERNAL (sym) | |
1748 | && ! sym->sy_tc.output | |
1749 | && S_GET_STORAGE_CLASS (sym) != C_FILE))) | |
1750 | return 1; | |
1751 | ||
1752 | if (sym->sy_tc.real_name != (char *) NULL) | |
1753 | S_SET_NAME (sym, sym->sy_tc.real_name); | |
1754 | else | |
1755 | { | |
1756 | const char *name; | |
1757 | const char *s; | |
1758 | ||
1759 | name = S_GET_NAME (sym); | |
1760 | s = strchr (name, '['); | |
1761 | if (s != (char *) NULL) | |
1762 | { | |
1763 | unsigned int len; | |
1764 | char *snew; | |
1765 | ||
1766 | len = s - name; | |
1767 | snew = xmalloc (len + 1); | |
1768 | memcpy (snew, name, len); | |
1769 | snew[len] = '\0'; | |
1770 | ||
1771 | S_SET_NAME (sym, snew); | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | if (set_end != (symbolS *) NULL) | |
1776 | { | |
1777 | SA_SET_SYM_ENDNDX (set_end, sym); | |
1778 | set_end = NULL; | |
1779 | } | |
1780 | ||
1781 | if (SF_GET_FUNCTION (sym)) | |
1782 | { | |
1783 | if (ppc_last_function != (symbolS *) NULL) | |
1784 | as_warn ("two .function pseudo-ops with no intervening .ef"); | |
1785 | ppc_last_function = sym; | |
1786 | if (sym->sy_tc.size != (symbolS *) NULL) | |
1787 | { | |
1788 | resolve_symbol_value (sym->sy_tc.size); | |
1789 | SA_SET_SYM_FSIZE (sym, (long) S_GET_VALUE (sym->sy_tc.size)); | |
1790 | } | |
1791 | } | |
1792 | else if (S_GET_STORAGE_CLASS (sym) == C_FCN | |
1793 | && strcmp (S_GET_NAME (sym), ".ef") == 0) | |
1794 | { | |
1795 | if (ppc_last_function == (symbolS *) NULL) | |
1796 | as_warn (".ef with no preceding .function"); | |
1797 | else | |
1798 | { | |
1799 | set_end = ppc_last_function; | |
1800 | ppc_last_function = NULL; | |
1801 | ||
1802 | /* We don't have a C_EFCN symbol, but we need to force the | |
1803 | COFF backend to believe that it has seen one. */ | |
1804 | coff_last_function = NULL; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | if (! S_IS_EXTERNAL (sym) | |
1809 | && (sym->bsym->flags & BSF_SECTION_SYM) == 0 | |
1810 | && S_GET_STORAGE_CLASS (sym) != C_FILE | |
1811 | && S_GET_STORAGE_CLASS (sym) != C_FCN | |
1812 | && S_GET_STORAGE_CLASS (sym) != C_BSTAT | |
1813 | && S_GET_STORAGE_CLASS (sym) != C_ESTAT | |
1814 | && S_GET_SEGMENT (sym) != ppc_coff_debug_section) | |
1815 | S_SET_STORAGE_CLASS (sym, C_HIDEXT); | |
1816 | ||
1817 | if (S_GET_STORAGE_CLASS (sym) == C_EXT | |
1818 | || S_GET_STORAGE_CLASS (sym) == C_HIDEXT) | |
1819 | { | |
1820 | int i; | |
1821 | union internal_auxent *a; | |
1822 | ||
1823 | /* Create a csect aux. */ | |
1824 | i = S_GET_NUMBER_AUXILIARY (sym); | |
1825 | S_SET_NUMBER_AUXILIARY (sym, i + 1); | |
1826 | a = &coffsymbol (sym->bsym)->native[i + 1].u.auxent; | |
1827 | if (sym->sy_tc.class == XMC_TC0) | |
1828 | { | |
1829 | /* This is the TOC table. */ | |
1830 | know (strcmp (S_GET_NAME (sym), "TOC") == 0); | |
1831 | a->x_csect.x_scnlen.l = 0; | |
1832 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; | |
1833 | } | |
1834 | else if (sym->sy_tc.subseg != 0) | |
1835 | { | |
1836 | /* This is a csect symbol. x_scnlen is the size of the | |
1837 | csect. */ | |
1838 | if (sym->sy_tc.next == (symbolS *) NULL) | |
1839 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, | |
1840 | S_GET_SEGMENT (sym)) | |
1841 | - S_GET_VALUE (sym)); | |
1842 | else | |
1843 | { | |
1844 | resolve_symbol_value (sym->sy_tc.next); | |
1845 | a->x_csect.x_scnlen.l = (S_GET_VALUE (sym->sy_tc.next) | |
1846 | - S_GET_VALUE (sym)); | |
1847 | } | |
1848 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_SD; | |
1849 | } | |
1850 | else if (S_GET_SEGMENT (sym) == bss_section) | |
1851 | { | |
1852 | /* This is a common symbol. */ | |
1853 | a->x_csect.x_scnlen.l = sym->sy_frag->fr_offset; | |
1854 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_CM; | |
1855 | if (S_IS_EXTERNAL (sym)) | |
1856 | sym->sy_tc.class = XMC_RW; | |
1857 | else | |
1858 | sym->sy_tc.class = XMC_BS; | |
1859 | } | |
1860 | else if (! S_IS_DEFINED (sym)) | |
1861 | { | |
1862 | /* This is an external symbol. */ | |
1863 | a->x_csect.x_scnlen.l = 0; | |
1864 | a->x_csect.x_smtyp = XTY_ER; | |
1865 | } | |
1866 | else if (sym->sy_tc.class == XMC_TC) | |
1867 | { | |
1868 | symbolS *next; | |
1869 | ||
1870 | /* This is a TOC definition. x_scnlen is the size of the | |
1871 | TOC entry. */ | |
1872 | next = symbol_next (sym); | |
1873 | while (next->sy_tc.class == XMC_TC0) | |
1874 | next = symbol_next (next); | |
1875 | if (next == (symbolS *) NULL | |
1876 | || next->sy_tc.class != XMC_TC) | |
1877 | { | |
1878 | if (ppc_after_toc_frag == (fragS *) NULL) | |
1879 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, | |
1880 | data_section) | |
1881 | - S_GET_VALUE (sym)); | |
1882 | else | |
1883 | a->x_csect.x_scnlen.l = (ppc_after_toc_frag->fr_address | |
1884 | - S_GET_VALUE (sym)); | |
1885 | } | |
1886 | else | |
1887 | { | |
1888 | resolve_symbol_value (next); | |
1889 | a->x_csect.x_scnlen.l = (S_GET_VALUE (next) | |
1890 | - S_GET_VALUE (sym)); | |
1891 | } | |
1892 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; | |
1893 | } | |
1894 | else | |
1895 | { | |
1896 | symbolS *csect; | |
1897 | ||
1898 | /* This is a normal symbol definition. x_scnlen is the | |
1899 | symbol index of the containing csect. */ | |
1900 | if (S_GET_SEGMENT (sym) == text_section) | |
1901 | csect = ppc_text_csects; | |
1902 | else if (S_GET_SEGMENT (sym) == data_section) | |
1903 | csect = ppc_data_csects; | |
1904 | else | |
1905 | abort (); | |
1906 | ||
1907 | /* Skip the initial dummy symbol. */ | |
1908 | csect = csect->sy_tc.next; | |
1909 | ||
1910 | if (csect == (symbolS *) NULL) | |
1911 | a->x_csect.x_scnlen.l = 0; | |
1912 | else | |
1913 | { | |
1914 | while (csect->sy_tc.next != (symbolS *) NULL) | |
1915 | { | |
1916 | resolve_symbol_value (csect->sy_tc.next); | |
1917 | if (S_GET_VALUE (csect->sy_tc.next) > S_GET_VALUE (sym)) | |
1918 | break; | |
1919 | csect = csect->sy_tc.next; | |
1920 | } | |
1921 | ||
1922 | a->x_csect.x_scnlen.p = coffsymbol (csect->bsym)->native; | |
1923 | coffsymbol (sym->bsym)->native[i + 1].fix_scnlen = 1; | |
1924 | } | |
1925 | a->x_csect.x_smtyp = XTY_LD; | |
1926 | } | |
1927 | ||
1928 | a->x_csect.x_parmhash = 0; | |
1929 | a->x_csect.x_snhash = 0; | |
1930 | if (sym->sy_tc.class == -1) | |
1931 | a->x_csect.x_smclas = XMC_PR; | |
1932 | else | |
1933 | a->x_csect.x_smclas = sym->sy_tc.class; | |
1934 | a->x_csect.x_stab = 0; | |
1935 | a->x_csect.x_snstab = 0; | |
1936 | } | |
1937 | else if (S_GET_STORAGE_CLASS (sym) == C_BSTAT) | |
1938 | { | |
1939 | /* We want the value to be the symbol index of the referenced | |
1940 | csect symbol. BFD will do that for us if we set the right | |
1941 | flags. */ | |
1942 | S_SET_VALUE (sym, | |
1943 | (valueT) coffsymbol (sym->sy_tc.within->bsym)->native); | |
1944 | coffsymbol (sym->bsym)->native->fix_value = 1; | |
1945 | } | |
1946 | ||
1947 | return 0; | |
1948 | } | |
1949 | ||
1950 | /* Set the VMA for a section. This is called on all the sections in | |
1951 | turn. */ | |
1952 | ||
1953 | void | |
1954 | ppc_frob_section (sec) | |
1955 | asection *sec; | |
1956 | { | |
1957 | static bfd_size_type vma = 0; | |
1958 | ||
1959 | bfd_set_section_vma (stdoutput, sec, vma); | |
1960 | vma += bfd_section_size (stdoutput, sec); | |
1961 | } | |
1962 | ||
1963 | /* Adjust the file by adding a .debug section if needed. */ | |
1964 | ||
1965 | void | |
1966 | ppc_frob_file () | |
1967 | { | |
1968 | if (ppc_debug_name_section_size > 0) | |
1969 | { | |
1970 | asection *sec; | |
1971 | ||
1972 | sec = bfd_make_section (stdoutput, ".debug"); | |
1973 | if (sec == (asection *) NULL | |
1974 | || ! bfd_set_section_size (stdoutput, sec, | |
1975 | ppc_debug_name_section_size) | |
1976 | || ! bfd_set_section_flags (stdoutput, sec, | |
1977 | SEC_HAS_CONTENTS | SEC_LOAD)) | |
1978 | as_fatal ("can't make .debug section"); | |
1979 | } | |
1980 | } | |
1981 | ||
1982 | #endif /* OBJ_COFF */ | |
1983 | \f | |
1984 | /* Turn a string in input_line_pointer into a floating point constant | |
1985 | of type type, and store the appropriate bytes in *litp. The number | |
1986 | of LITTLENUMS emitted is stored in *sizep . An error message is | |
1987 | returned, or NULL on OK. */ | |
1988 | ||
1989 | char * | |
1990 | md_atof (type, litp, sizep) | |
1991 | int type; | |
1992 | char *litp; | |
1993 | int *sizep; | |
1994 | { | |
1995 | int prec; | |
1996 | LITTLENUM_TYPE words[4]; | |
1997 | char *t; | |
1998 | int i; | |
1999 | ||
2000 | switch (type) | |
2001 | { | |
2002 | case 'f': | |
2003 | prec = 2; | |
2004 | break; | |
2005 | ||
2006 | case 'd': | |
2007 | prec = 4; | |
2008 | break; | |
2009 | ||
2010 | default: | |
2011 | *sizep = 0; | |
2012 | return "bad call to md_atof"; | |
2013 | } | |
2014 | ||
2015 | t = atof_ieee (input_line_pointer, type, words); | |
2016 | if (t) | |
2017 | input_line_pointer = t; | |
2018 | ||
2019 | *sizep = prec * 2; | |
2020 | ||
2021 | if (ppc_big_endian) | |
2022 | { | |
2023 | for (i = 0; i < prec; i++) | |
2024 | { | |
2025 | md_number_to_chars (litp, (valueT) words[i], 2); | |
2026 | litp += 2; | |
2027 | } | |
2028 | } | |
2029 | else | |
2030 | { | |
2031 | for (i = prec - 1; i >= 0; i--) | |
2032 | { | |
2033 | md_number_to_chars (litp, (valueT) words[i], 2); | |
2034 | litp += 2; | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | return NULL; | |
2039 | } | |
2040 | ||
2041 | /* Write a value out to the object file, using the appropriate | |
2042 | endianness. */ | |
2043 | ||
2044 | void | |
2045 | md_number_to_chars (buf, val, n) | |
2046 | char *buf; | |
2047 | valueT val; | |
2048 | int n; | |
2049 | { | |
2050 | if (ppc_big_endian) | |
2051 | number_to_chars_bigendian (buf, val, n); | |
2052 | else | |
2053 | number_to_chars_littleendian (buf, val, n); | |
2054 | } | |
2055 | ||
2056 | /* Align a section (I don't know why this is machine dependent). */ | |
2057 | ||
2058 | valueT | |
2059 | md_section_align (seg, addr) | |
2060 | asection *seg; | |
2061 | valueT addr; | |
2062 | { | |
2063 | int align = bfd_get_section_alignment (stdoutput, seg); | |
2064 | ||
2065 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
2066 | } | |
2067 | ||
2068 | /* We don't have any form of relaxing. */ | |
2069 | ||
2070 | int | |
2071 | md_estimate_size_before_relax (fragp, seg) | |
2072 | fragS *fragp; | |
2073 | asection *seg; | |
2074 | { | |
2075 | abort (); | |
2076 | } | |
2077 | ||
2078 | const relax_typeS md_relax_table[] = | |
2079 | { | |
2080 | { 0 } | |
2081 | }; | |
2082 | ||
2083 | /* Convert a machine dependent frag. We never generate these. */ | |
2084 | ||
2085 | void | |
2086 | md_convert_frag (abfd, sec, fragp) | |
2087 | bfd *abfd; | |
2088 | asection *sec; | |
2089 | fragS *fragp; | |
2090 | { | |
2091 | abort (); | |
2092 | } | |
2093 | ||
2094 | /* Parse an operand that is machine-specific. We just return without | |
2095 | modifying the expression if we have nothing to do. */ | |
2096 | ||
2097 | /*ARGSUSED*/ | |
2098 | void | |
2099 | md_operand (expressionP) | |
2100 | expressionS *expressionP; | |
2101 | { | |
2102 | } | |
2103 | ||
2104 | /* We have no need to default values of symbols. */ | |
2105 | ||
2106 | /*ARGSUSED*/ | |
2107 | symbolS * | |
2108 | md_undefined_symbol (name) | |
2109 | char *name; | |
2110 | { | |
2111 | return 0; | |
2112 | } | |
2113 | \f | |
2114 | /* Functions concerning relocs. */ | |
2115 | ||
2116 | /* The location from which a PC relative jump should be calculated, | |
2117 | given a PC relative reloc. */ | |
2118 | ||
2119 | long | |
2120 | md_pcrel_from (fixp) | |
2121 | fixS *fixp; | |
2122 | { | |
2123 | #ifdef OBJ_ELF | |
2124 | if (fixp->fx_addsy != (symbolS *) NULL | |
2125 | && ! S_IS_DEFINED (fixp->fx_addsy)) | |
2126 | return 0; | |
2127 | #endif | |
2128 | ||
2129 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
2130 | } | |
2131 | ||
2132 | #ifdef OBJ_COFF | |
2133 | ||
2134 | /* This is called to see whether a fixup should be adjusted to use a | |
2135 | section symbol. We take the opportunity to change a fixup against | |
2136 | a symbol in the TOC subsegment into a reloc against the | |
2137 | corresponding .tc symbol. Note that this is called before the | |
2138 | symbol values are finalized, but after the frag addresses are set, | |
2139 | so we must add the frag address to the symbol values. */ | |
2140 | ||
2141 | int | |
2142 | ppc_fix_adjustable (fix) | |
2143 | fixS *fix; | |
2144 | { | |
2145 | valueT val; | |
2146 | ||
2147 | val = S_GET_VALUE (fix->fx_addsy) + fix->fx_addsy->sy_frag->fr_address; | |
2148 | if (ppc_toc_csect != (symbolS *) NULL | |
2149 | && fix->fx_addsy != (symbolS *) NULL | |
2150 | && fix->fx_addsy != ppc_toc_csect | |
2151 | && S_GET_SEGMENT (fix->fx_addsy) == data_section | |
2152 | && val >= ppc_toc_frag->fr_address | |
2153 | && (ppc_after_toc_frag == (fragS *) NULL | |
2154 | || val < ppc_after_toc_frag->fr_address)) | |
2155 | { | |
2156 | symbolS *sy; | |
2157 | ||
2158 | for (sy = symbol_next (ppc_toc_csect); | |
2159 | sy != (symbolS *) NULL; | |
2160 | sy = symbol_next (sy)) | |
2161 | { | |
2162 | if (sy->sy_tc.class == XMC_TC0) | |
2163 | continue; | |
2164 | if (sy->sy_tc.class != XMC_TC) | |
2165 | break; | |
2166 | if (val == S_GET_VALUE (sy) + sy->sy_frag->fr_address) | |
2167 | { | |
2168 | fix->fx_addsy = sy; | |
2169 | fix->fx_addnumber = val - ppc_toc_frag->fr_address; | |
2170 | return 0; | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | as_bad_where (fix->fx_file, fix->fx_line, | |
2175 | "symbol in .toc does not match any .tc"); | |
2176 | } | |
2177 | ||
2178 | /* Possibly adjust the reloc to be against the csect. */ | |
2179 | if (fix->fx_addsy != (symbolS *) NULL | |
2180 | && fix->fx_addsy->sy_tc.subseg == 0 | |
2181 | && fix->fx_addsy->sy_tc.class != XMC_TC0 | |
2182 | && fix->fx_addsy->sy_tc.class != XMC_TC | |
2183 | && S_GET_SEGMENT (fix->fx_addsy) != bss_section) | |
2184 | { | |
2185 | symbolS *csect; | |
2186 | ||
2187 | if (S_GET_SEGMENT (fix->fx_addsy) == text_section) | |
2188 | csect = ppc_text_csects; | |
2189 | else if (S_GET_SEGMENT (fix->fx_addsy) == data_section) | |
2190 | csect = ppc_data_csects; | |
2191 | else | |
2192 | abort (); | |
2193 | ||
2194 | /* Skip the initial dummy symbol. */ | |
2195 | csect = csect->sy_tc.next; | |
2196 | ||
2197 | if (csect != (symbolS *) NULL) | |
2198 | { | |
2199 | while (csect->sy_tc.next != (symbolS *) NULL | |
2200 | && (csect->sy_tc.next->sy_frag->fr_address | |
2201 | <= fix->fx_addsy->sy_frag->fr_address)) | |
2202 | csect = csect->sy_tc.next; | |
2203 | ||
2204 | fix->fx_offset += (S_GET_VALUE (fix->fx_addsy) | |
2205 | + (fix->fx_addsy->sy_frag->fr_address | |
2206 | - csect->sy_frag->fr_address)); | |
2207 | fix->fx_addsy = csect; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | /* Adjust a reloc against a .lcomm symbol to be against the base | |
2212 | .lcomm. */ | |
2213 | if (fix->fx_addsy != (symbolS *) NULL | |
2214 | && S_GET_SEGMENT (fix->fx_addsy) == bss_section | |
2215 | && ! S_IS_EXTERNAL (fix->fx_addsy)) | |
2216 | { | |
2217 | fix->fx_offset += S_GET_VALUE (fix->fx_addsy); | |
2218 | fix->fx_addsy = fix->fx_addsy->sy_frag->fr_symbol; | |
2219 | } | |
2220 | ||
2221 | return 0; | |
2222 | } | |
2223 | ||
2224 | #endif | |
2225 | ||
2226 | /* See whether a symbol is in the TOC section. */ | |
2227 | ||
2228 | static int | |
2229 | ppc_is_toc_sym (sym) | |
2230 | symbolS *sym; | |
2231 | { | |
2232 | #ifdef OBJ_COFF | |
2233 | return sym->sy_tc.class == XMC_TC; | |
2234 | #else | |
2235 | return strcmp (segment_name (S_GET_SEGMENT (sym)), ".got") == 0; | |
2236 | #endif | |
2237 | } | |
2238 | ||
2239 | /* Apply a fixup to the object code. This is called for all the | |
2240 | fixups we generated by the call to fix_new_exp, above. In the call | |
2241 | above we used a reloc code which was the largest legal reloc code | |
2242 | plus the operand index. Here we undo that to recover the operand | |
2243 | index. At this point all symbol values should be fully resolved, | |
2244 | and we attempt to completely resolve the reloc. If we can not do | |
2245 | that, we determine the correct reloc code and put it back in the | |
2246 | fixup. */ | |
2247 | ||
2248 | int | |
2249 | md_apply_fix (fixp, valuep) | |
2250 | fixS *fixp; | |
2251 | valueT *valuep; | |
2252 | { | |
2253 | valueT value; | |
2254 | ||
2255 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes | |
2256 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
2257 | doing this relocation the code in write.c is going to call | |
2258 | bfd_perform_relocation, which is also going to use the symbol | |
2259 | value. That means that if the reloc is fully resolved we want to | |
2260 | use *valuep since bfd_perform_relocation is not being used. | |
2261 | However, if the reloc is not fully resolved we do not want to use | |
2262 | *valuep, and must use fx_offset instead. However, if the reloc | |
2263 | is PC relative, we do want to use *valuep since it includes the | |
2264 | result of md_pcrel_from. This is confusing. */ | |
2265 | ||
2266 | if (fixp->fx_addsy == (symbolS *) NULL) | |
2267 | { | |
2268 | value = *valuep; | |
2269 | fixp->fx_done = 1; | |
2270 | } | |
2271 | else if (fixp->fx_pcrel) | |
2272 | value = *valuep; | |
2273 | else | |
2274 | { | |
2275 | value = fixp->fx_offset; | |
2276 | if (fixp->fx_subsy != (symbolS *) NULL) | |
2277 | { | |
2278 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
2279 | value -= S_GET_VALUE (fixp->fx_subsy); | |
2280 | else | |
2281 | { | |
2282 | /* We can't actually support subtracting a symbol. */ | |
2283 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2284 | "expression too complex"); | |
2285 | } | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
2290 | { | |
2291 | int opindex; | |
2292 | const struct powerpc_operand *operand; | |
2293 | char *where; | |
2294 | unsigned long insn; | |
2295 | ||
2296 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; | |
2297 | ||
2298 | operand = &powerpc_operands[opindex]; | |
2299 | ||
2300 | /* Fetch the instruction, insert the fully resolved operand | |
2301 | value, and stuff the instruction back again. */ | |
2302 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
2303 | if (ppc_big_endian) | |
2304 | insn = bfd_getb32 ((unsigned char *) where); | |
2305 | else | |
2306 | insn = bfd_getl32 ((unsigned char *) where); | |
2307 | insn = ppc_insert_operand (insn, operand, (offsetT) value, | |
2308 | fixp->fx_file, fixp->fx_line); | |
2309 | if (ppc_big_endian) | |
2310 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); | |
2311 | else | |
2312 | bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); | |
2313 | ||
2314 | if (fixp->fx_done) | |
2315 | { | |
2316 | /* Nothing else to do here. */ | |
2317 | return 1; | |
2318 | } | |
2319 | ||
2320 | /* Determine a BFD reloc value based on the operand information. | |
2321 | We are only prepared to turn a few of the operands into | |
2322 | relocs. | |
2323 | FIXME: We need to handle the DS field at the very least. | |
2324 | FIXME: Handling 16 bit branches would also be reasonable. | |
2325 | FIXME: Selecting the reloc type is a bit haphazard; perhaps | |
2326 | there should be a new field in the operand table. */ | |
2327 | if ((operand->flags & PPC_OPERAND_RELATIVE) != 0 | |
2328 | && operand->bits == 26 | |
2329 | && operand->shift == 0) | |
2330 | fixp->fx_r_type = BFD_RELOC_PPC_B26; | |
2331 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0 | |
2332 | && operand->bits == 26 | |
2333 | && operand->shift == 0) | |
2334 | fixp->fx_r_type = BFD_RELOC_PPC_BA26; | |
2335 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0 | |
2336 | && operand->bits == 16 | |
2337 | && operand->shift == 0 | |
2338 | && operand->insert == NULL | |
2339 | && fixp->fx_addsy != NULL | |
2340 | && ppc_is_toc_sym (fixp->fx_addsy)) | |
2341 | { | |
2342 | fixp->fx_size = 2; | |
2343 | if (ppc_big_endian) | |
2344 | fixp->fx_where += 2; | |
2345 | fixp->fx_r_type = BFD_RELOC_PPC_TOC16; | |
2346 | } | |
2347 | else | |
2348 | { | |
2349 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2350 | "unresolved expression that must be resolved"); | |
2351 | fixp->fx_done = 1; | |
2352 | return 1; | |
2353 | } | |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | switch (fixp->fx_r_type) | |
2358 | { | |
2359 | case BFD_RELOC_32: | |
2360 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2361 | value, 4); | |
2362 | break; | |
2363 | case BFD_RELOC_16: | |
2364 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2365 | value, 2); | |
2366 | break; | |
2367 | case BFD_RELOC_8: | |
2368 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2369 | value, 1); | |
2370 | break; | |
2371 | default: | |
2372 | abort (); | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | #ifdef OBJ_ELF | |
2377 | fixp->fx_addnumber = value; | |
2378 | #else | |
2379 | if (fixp->fx_r_type != BFD_RELOC_PPC_TOC16) | |
2380 | fixp->fx_addnumber = 0; | |
2381 | else | |
2382 | { | |
2383 | /* We want to use the offset within the data segment of the | |
2384 | symbol, not the actual VMA of the symbol. */ | |
2385 | fixp->fx_addnumber = | |
2386 | - bfd_get_section_vma (stdoutput, S_GET_SEGMENT (fixp->fx_addsy)); | |
2387 | } | |
2388 | #endif | |
2389 | ||
2390 | return 1; | |
2391 | } | |
2392 | ||
2393 | /* Generate a reloc for a fixup. */ | |
2394 | ||
2395 | arelent * | |
2396 | tc_gen_reloc (seg, fixp) | |
2397 | asection *seg; | |
2398 | fixS *fixp; | |
2399 | { | |
2400 | arelent *reloc; | |
2401 | ||
2402 | reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent)); | |
2403 | ||
2404 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
2405 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2406 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2407 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2408 | { | |
2409 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2410 | "reloc not supported by object file format"); | |
2411 | return NULL; | |
2412 | } | |
2413 | reloc->addend = fixp->fx_addnumber; | |
2414 | ||
2415 | #ifdef OBJ_ELF | |
2416 | /* Don't ask. I hate this stuff. */ | |
2417 | if (reloc->howto->pc_relative) | |
2418 | reloc->addend -= reloc->address; | |
2419 | #endif | |
2420 | ||
2421 | return reloc; | |
2422 | } |