Commit | Line | Data |
---|---|---|
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 | ||
1eeb357e ILT |
173 | /* The current static block. */ |
174 | static symbolS *ppc_current_block; | |
175 | ||
882bdc69 ILT |
176 | /* The COFF debugging section; set by md_begin. This is not the |
177 | .debug section, but is instead the secret BFD section which will | |
178 | cause BFD to set the section number of a symbol to N_DEBUG. */ | |
179 | static asection *ppc_coff_debug_section; | |
180 | ||
181 | /* The size of the .debug section. */ | |
182 | static bfd_size_type ppc_debug_name_section_size; | |
183 | ||
184 | #endif /* OBJ_COFF */ | |
da8fa3ba MM |
185 | |
186 | #ifdef OBJ_ELF | |
187 | symbolS *GOT_symbol; /* Pre-defined "_GLOBAL_OFFSET_TABLE" */ | |
188 | #endif /* OBJ_ELF */ | |
189 | ||
882bdc69 | 190 | \f |
1eeb357e ILT |
191 | #ifdef OBJ_ELF |
192 | CONST char *md_shortopts = "um:VQ:"; | |
193 | #else | |
194 | CONST char *md_shortopts = "um:"; | |
195 | #endif | |
196 | struct option md_longopts[] = { | |
197 | {NULL, no_argument, NULL, 0} | |
198 | }; | |
199 | size_t md_longopts_size = sizeof(md_longopts); | |
882bdc69 ILT |
200 | |
201 | int | |
1eeb357e ILT |
202 | md_parse_option (c, arg) |
203 | int c; | |
204 | char *arg; | |
882bdc69 | 205 | { |
1eeb357e | 206 | switch (c) |
882bdc69 | 207 | { |
1eeb357e ILT |
208 | case 'u': |
209 | /* -u means that any undefined symbols should be treated as | |
210 | external, which is the default for gas anyhow. */ | |
211 | break; | |
882bdc69 | 212 | |
1eeb357e ILT |
213 | case 'm': |
214 | /* -mpwrx and -mpwr2 mean to assemble for the IBM POWER/2 | |
215 | (RIOS2). */ | |
216 | if (strcmp (arg, "pwrx") == 0 || strcmp (arg, "pwr2") == 0) | |
217 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2; | |
218 | /* -mpwr means to assemble for the IBM POWER (RIOS1). */ | |
219 | else if (strcmp (arg, "pwr") == 0) | |
220 | ppc_cpu = PPC_OPCODE_POWER; | |
221 | /* -m601 means to assemble for the Motorola PowerPC 601. FIXME: We | |
222 | ignore the option for now, but we should really use it to permit | |
223 | instructions defined on the 601 that are not part of the standard | |
224 | PowerPC architecture (mostly holdovers from the POWER). */ | |
225 | else if (strcmp (arg, "601") == 0) | |
226 | ppc_cpu = PPC_OPCODE_PPC | PPC_OPCODE_601; | |
227 | /* -mppc, -mppc32, -m603, and -m604 mean to assemble for the | |
228 | Motorola PowerPC 603/604. */ | |
229 | else if (strcmp (arg, "ppc") == 0 | |
230 | || strcmp (arg, "ppc32") == 0 | |
231 | || strcmp (arg, "603") == 0 | |
232 | || strcmp (arg, "604") == 0) | |
233 | ppc_cpu = PPC_OPCODE_PPC; | |
234 | /* -mppc64 and -m620 mean to assemble for the 64-bit PowerPC | |
235 | 620. */ | |
236 | else if (strcmp (arg, "ppc64") == 0 || strcmp (arg, "620") == 0) | |
237 | { | |
238 | ppc_cpu = PPC_OPCODE_PPC; | |
239 | ppc_size = PPC_OPCODE_64; | |
240 | } | |
241 | /* -many means to assemble for any architecture (PWR/PWRX/PPC). */ | |
242 | else if (strcmp (arg, "any") == 0) | |
243 | ppc_cpu = PPC_OPCODE_POWER | PPC_OPCODE_POWER2 | PPC_OPCODE_PPC; | |
244 | else | |
245 | { | |
246 | as_bad ("invalid architecture -m%s", arg); | |
247 | return 0; | |
248 | } | |
249 | break; | |
882bdc69 | 250 | |
1eeb357e ILT |
251 | #ifdef OBJ_ELF |
252 | /* -V: SVR4 argument to print version ID. */ | |
253 | case 'V': | |
254 | print_version_id (); | |
255 | break; | |
882bdc69 | 256 | |
1eeb357e ILT |
257 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section |
258 | should be emitted or not. FIXME: Not implemented. */ | |
259 | case 'Q': | |
260 | break; | |
261 | #endif | |
882bdc69 | 262 | |
1eeb357e ILT |
263 | default: |
264 | return 0; | |
882bdc69 ILT |
265 | } |
266 | ||
1eeb357e ILT |
267 | return 1; |
268 | } | |
882bdc69 | 269 | |
1eeb357e ILT |
270 | void |
271 | md_show_usage (stream) | |
272 | FILE *stream; | |
273 | { | |
274 | fprintf(stream, "\ | |
275 | PowerPC options:\n\ | |
276 | -u ignored\n\ | |
277 | -mpwrx generate code for IBM POWER/2 (RIOS2)\n\ | |
278 | -mpwr generate code for IBM POWER (RIOS1)\n\ | |
279 | -m601 generate code for Motorola PowerPC 601\n\ | |
280 | -mppc generate code for Motorola PowerPC 603/604\n\ | |
281 | -many generate code for any architecture (PWR/PWRX/PPC)\n"); | |
882bdc69 | 282 | #ifdef OBJ_ELF |
1eeb357e ILT |
283 | fprintf(stream, "\ |
284 | -V print assembler version number\n\ | |
285 | -Qy, -Qn ignored\n"); | |
882bdc69 | 286 | #endif |
882bdc69 | 287 | } |
1eeb357e | 288 | \f |
882bdc69 ILT |
289 | /* Set ppc_cpu if it is not already set. */ |
290 | ||
291 | static void | |
292 | ppc_set_cpu () | |
293 | { | |
294 | const char *default_cpu = TARGET_CPU; | |
295 | ||
296 | if (ppc_cpu == 0) | |
297 | { | |
298 | if (strcmp (default_cpu, "rs6000") == 0) | |
299 | ppc_cpu = PPC_OPCODE_POWER; | |
300 | else if (strcmp (default_cpu, "powerpc") == 0) | |
301 | ppc_cpu = PPC_OPCODE_PPC; | |
302 | else | |
303 | abort (); | |
304 | } | |
305 | } | |
306 | ||
307 | /* Figure out the BFD architecture to use. */ | |
308 | ||
309 | enum bfd_architecture | |
310 | ppc_arch () | |
311 | { | |
312 | ppc_set_cpu (); | |
313 | ||
1e147242 | 314 | if ((ppc_cpu & PPC_OPCODE_PPC) != 0) |
882bdc69 | 315 | return bfd_arch_powerpc; |
1e147242 ILT |
316 | else if ((ppc_cpu & PPC_OPCODE_POWER) != 0) |
317 | return bfd_arch_rs6000; | |
882bdc69 ILT |
318 | else |
319 | abort (); | |
320 | } | |
321 | ||
322 | /* This function is called when the assembler starts up. It is called | |
323 | after the options have been parsed and the output file has been | |
324 | opened. */ | |
325 | ||
326 | void | |
327 | md_begin () | |
328 | { | |
329 | register const struct powerpc_opcode *op; | |
330 | const struct powerpc_opcode *op_end; | |
331 | const struct powerpc_macro *macro; | |
332 | const struct powerpc_macro *macro_end; | |
333 | ||
334 | ppc_set_cpu (); | |
335 | ||
336 | /* Insert the opcodes into a hash table. */ | |
337 | ppc_hash = hash_new (); | |
338 | ||
339 | op_end = powerpc_opcodes + powerpc_num_opcodes; | |
340 | for (op = powerpc_opcodes; op < op_end; op++) | |
341 | { | |
342 | know ((op->opcode & op->mask) == op->opcode); | |
343 | ||
1e147242 ILT |
344 | if ((op->flags & ppc_cpu) != 0 |
345 | && ((op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == 0 | |
346 | || (op->flags & (PPC_OPCODE_32 | PPC_OPCODE_64)) == ppc_size)) | |
882bdc69 ILT |
347 | { |
348 | const char *retval; | |
349 | ||
350 | retval = hash_insert (ppc_hash, op->name, (PTR) op); | |
351 | if (retval != (const char *) NULL) | |
1eeb357e | 352 | { |
76e30835 ILT |
353 | /* We permit a duplication of the mfdec instruction on |
354 | the 601, because it seems to have one value on the | |
355 | 601 and a different value on other PowerPC | |
356 | processors. It's easier to permit a duplication than | |
357 | to define a new instruction type flag. When using | |
358 | -many, the comparison instructions are a harmless | |
359 | special case. */ | |
360 | if (strcmp (retval, "exists") != 0 | |
361 | || (((ppc_cpu & PPC_OPCODE_601) == 0 | |
362 | || strcmp (op->name, "mfdec") != 0) | |
363 | && (ppc_cpu != (PPC_OPCODE_POWER | |
364 | | PPC_OPCODE_POWER2 | |
365 | | PPC_OPCODE_PPC) | |
366 | || (strcmp (op->name, "cmpli") != 0 | |
367 | && strcmp (op->name, "cmpi") != 0 | |
368 | && strcmp (op->name, "cmp") != 0 | |
369 | && strcmp (op->name, "cmpl") != 0)))) | |
1eeb357e ILT |
370 | abort (); |
371 | } | |
882bdc69 ILT |
372 | } |
373 | } | |
374 | ||
375 | /* Insert the macros into a hash table. */ | |
376 | ppc_macro_hash = hash_new (); | |
377 | ||
378 | macro_end = powerpc_macros + powerpc_num_macros; | |
379 | for (macro = powerpc_macros; macro < macro_end; macro++) | |
380 | { | |
381 | if ((macro->flags & ppc_cpu) != 0) | |
382 | { | |
383 | const char *retval; | |
384 | ||
385 | retval = hash_insert (ppc_macro_hash, macro->name, (PTR) macro); | |
386 | if (retval != (const char *) NULL) | |
387 | abort (); | |
388 | } | |
389 | } | |
390 | ||
391 | /* Tell the main code what the endianness is. */ | |
392 | target_big_endian = ppc_big_endian; | |
393 | ||
394 | #ifdef OBJ_COFF | |
395 | ppc_coff_debug_section = coff_section_from_bfd_index (stdoutput, N_DEBUG); | |
396 | ||
397 | /* Create dummy symbols to serve as initial csects. This forces the | |
398 | text csects to precede the data csects. These symbols will not | |
399 | be output. */ | |
400 | ppc_text_csects = symbol_make ("dummy\001"); | |
401 | ppc_text_csects->sy_tc.within = ppc_text_csects; | |
402 | ppc_data_csects = symbol_make ("dummy\001"); | |
403 | ppc_data_csects->sy_tc.within = ppc_data_csects; | |
404 | #endif | |
405 | } | |
406 | ||
407 | /* Insert an operand value into an instruction. */ | |
408 | ||
409 | static unsigned long | |
410 | ppc_insert_operand (insn, operand, val, file, line) | |
411 | unsigned long insn; | |
412 | const struct powerpc_operand *operand; | |
413 | offsetT val; | |
414 | char *file; | |
415 | unsigned int line; | |
416 | { | |
417 | if (operand->bits != 32) | |
418 | { | |
419 | long min, max; | |
420 | offsetT test; | |
421 | ||
1eeb357e | 422 | if ((operand->flags & PPC_OPERAND_SIGNED) != 0) |
882bdc69 | 423 | { |
1eeb357e ILT |
424 | if ((operand->flags & PPC_OPERAND_SIGNOPT) != 0 |
425 | && ppc_size == PPC_OPCODE_32) | |
426 | max = (1 << operand->bits) - 1; | |
427 | else | |
428 | max = (1 << (operand->bits - 1)) - 1; | |
882bdc69 ILT |
429 | min = - (1 << (operand->bits - 1)); |
430 | } | |
431 | else | |
432 | { | |
433 | max = (1 << operand->bits) - 1; | |
434 | min = 0; | |
435 | } | |
436 | ||
437 | if ((operand->flags & PPC_OPERAND_NEGATIVE) != 0) | |
438 | test = - val; | |
439 | else | |
440 | test = val; | |
441 | ||
442 | if (test < (offsetT) min || test > (offsetT) max) | |
443 | { | |
444 | const char *err = | |
445 | "operand out of range (%s not between %ld and %ld)"; | |
446 | char buf[100]; | |
447 | ||
448 | sprint_value (buf, test); | |
449 | if (file == (char *) NULL) | |
450 | as_warn (err, buf, min, max); | |
451 | else | |
452 | as_warn_where (file, line, err, buf, min, max); | |
453 | } | |
454 | } | |
455 | ||
456 | if (operand->insert) | |
457 | { | |
458 | const char *errmsg; | |
459 | ||
460 | errmsg = NULL; | |
461 | insn = (*operand->insert) (insn, (long) val, &errmsg); | |
462 | if (errmsg != (const char *) NULL) | |
463 | as_warn (errmsg); | |
464 | } | |
465 | else | |
466 | insn |= (((long) val & ((1 << operand->bits) - 1)) | |
467 | << operand->shift); | |
468 | ||
469 | return insn; | |
470 | } | |
471 | ||
472 | /* We need to keep a list of fixups. We can't simply generate them as | |
473 | we go, because that would require us to first create the frag, and | |
474 | that would screw up references to ``.''. */ | |
475 | ||
476 | struct ppc_fixup | |
477 | { | |
478 | expressionS exp; | |
479 | int opindex; | |
480 | }; | |
481 | ||
482 | #define MAX_INSN_FIXUPS (5) | |
483 | ||
484 | /* This routine is called for each instruction to be assembled. */ | |
485 | ||
486 | void | |
487 | md_assemble (str) | |
488 | char *str; | |
489 | { | |
490 | char *s; | |
491 | const struct powerpc_opcode *opcode; | |
492 | unsigned long insn; | |
493 | const unsigned char *opindex_ptr; | |
494 | int skip_optional; | |
495 | int need_paren; | |
496 | int next_opindex; | |
497 | struct ppc_fixup fixups[MAX_INSN_FIXUPS]; | |
498 | int fc; | |
499 | char *f; | |
500 | int i; | |
501 | ||
502 | /* Get the opcode. */ | |
503 | for (s = str; *s != '\0' && ! isspace (*s); s++) | |
504 | ; | |
505 | if (*s != '\0') | |
506 | *s++ = '\0'; | |
507 | ||
508 | /* Look up the opcode in the hash table. */ | |
509 | opcode = (const struct powerpc_opcode *) hash_find (ppc_hash, str); | |
510 | if (opcode == (const struct powerpc_opcode *) NULL) | |
511 | { | |
512 | const struct powerpc_macro *macro; | |
513 | ||
514 | macro = (const struct powerpc_macro *) hash_find (ppc_macro_hash, str); | |
515 | if (macro == (const struct powerpc_macro *) NULL) | |
516 | as_bad ("Unrecognized opcode: `%s'", str); | |
517 | else | |
518 | ppc_macro (s, macro); | |
519 | ||
520 | return; | |
521 | } | |
522 | ||
523 | insn = opcode->opcode; | |
524 | ||
525 | str = s; | |
526 | while (isspace (*str)) | |
527 | ++str; | |
528 | ||
529 | /* PowerPC operands are just expressions. The only real issue is | |
530 | that a few operand types are optional. All cases which might use | |
531 | an optional operand separate the operands only with commas (in | |
532 | some cases parentheses are used, as in ``lwz 1,0(1)'' but such | |
533 | cases never have optional operands). There is never more than | |
534 | one optional operand for an instruction. So, before we start | |
535 | seriously parsing the operands, we check to see if we have an | |
536 | optional operand, and, if we do, we count the number of commas to | |
537 | see whether the operand should be omitted. */ | |
538 | skip_optional = 0; | |
539 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
540 | { | |
541 | const struct powerpc_operand *operand; | |
542 | ||
543 | operand = &powerpc_operands[*opindex_ptr]; | |
544 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0) | |
545 | { | |
546 | unsigned int opcount; | |
547 | ||
548 | /* There is an optional operand. Count the number of | |
549 | commas in the input line. */ | |
550 | if (*str == '\0') | |
551 | opcount = 0; | |
552 | else | |
553 | { | |
554 | opcount = 1; | |
555 | s = str; | |
556 | while ((s = strchr (s, ',')) != (char *) NULL) | |
557 | { | |
558 | ++opcount; | |
559 | ++s; | |
560 | } | |
561 | } | |
562 | ||
563 | /* If there are fewer operands in the line then are called | |
564 | for by the instruction, we want to skip the optional | |
565 | operand. */ | |
566 | if (opcount < strlen (opcode->operands)) | |
567 | skip_optional = 1; | |
568 | ||
569 | break; | |
570 | } | |
571 | } | |
572 | ||
573 | /* Gather the operands. */ | |
574 | need_paren = 0; | |
575 | next_opindex = 0; | |
576 | fc = 0; | |
577 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) | |
578 | { | |
579 | const struct powerpc_operand *operand; | |
580 | const char *errmsg; | |
581 | char *hold; | |
582 | expressionS ex; | |
583 | char endc; | |
584 | ||
585 | if (next_opindex == 0) | |
586 | operand = &powerpc_operands[*opindex_ptr]; | |
587 | else | |
588 | { | |
589 | operand = &powerpc_operands[next_opindex]; | |
590 | next_opindex = 0; | |
591 | } | |
592 | ||
593 | errmsg = NULL; | |
594 | ||
595 | /* If this is a fake operand, then we do not expect anything | |
596 | from the input. */ | |
597 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) | |
598 | { | |
599 | insn = (*operand->insert) (insn, 0L, &errmsg); | |
600 | if (errmsg != (const char *) NULL) | |
601 | as_warn (errmsg); | |
602 | continue; | |
603 | } | |
604 | ||
605 | /* If this is an optional operand, and we are skipping it, just | |
606 | insert a zero. */ | |
607 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 | |
608 | && skip_optional) | |
609 | { | |
610 | if (operand->insert) | |
611 | { | |
612 | insn = (*operand->insert) (insn, 0L, &errmsg); | |
613 | if (errmsg != (const char *) NULL) | |
614 | as_warn (errmsg); | |
615 | } | |
616 | if ((operand->flags & PPC_OPERAND_NEXT) != 0) | |
617 | next_opindex = *opindex_ptr + 1; | |
618 | continue; | |
619 | } | |
620 | ||
621 | /* Gather the operand. */ | |
622 | hold = input_line_pointer; | |
623 | input_line_pointer = str; | |
624 | expression (&ex); | |
625 | str = input_line_pointer; | |
626 | input_line_pointer = hold; | |
627 | ||
628 | if (ex.X_op == O_illegal) | |
629 | as_bad ("illegal operand"); | |
630 | else if (ex.X_op == O_absent) | |
631 | as_bad ("missing operand"); | |
632 | else if (ex.X_op == O_constant) | |
633 | insn = ppc_insert_operand (insn, operand, ex.X_add_number, | |
634 | (char *) NULL, 0); | |
635 | else | |
636 | { | |
637 | /* We need to generate a fixup for this expression. */ | |
638 | if (fc >= MAX_INSN_FIXUPS) | |
639 | as_fatal ("too many fixups"); | |
640 | fixups[fc].exp = ex; | |
641 | fixups[fc].opindex = *opindex_ptr; | |
642 | ++fc; | |
643 | } | |
644 | ||
645 | if (need_paren) | |
646 | { | |
647 | endc = ')'; | |
648 | need_paren = 0; | |
649 | } | |
650 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0) | |
651 | { | |
652 | endc = '('; | |
653 | need_paren = 1; | |
654 | } | |
655 | else | |
656 | endc = ','; | |
657 | ||
658 | /* The call to expression should have advanced str past any | |
659 | whitespace. */ | |
660 | if (*str != endc | |
661 | && (endc != ',' || *str != '\0')) | |
662 | { | |
663 | as_bad ("syntax error; found `%c' but expected `%c'", *str, endc); | |
664 | break; | |
665 | } | |
666 | ||
667 | if (*str != '\0') | |
668 | ++str; | |
669 | } | |
670 | ||
671 | while (isspace (*str)) | |
672 | ++str; | |
673 | ||
674 | if (*str != '\0') | |
675 | as_bad ("junk at end of line: `%s'", str); | |
676 | ||
677 | /* Write out the instruction. */ | |
678 | f = frag_more (4); | |
679 | md_number_to_chars (f, insn, 4); | |
680 | ||
681 | /* Create any fixups. At this point we do not use a | |
682 | bfd_reloc_code_real_type, but instead just use the operand index. | |
683 | This lets us easily handle fixups for any operand type, although | |
684 | that is admittedly not a very exciting feature. We pick a BFD | |
685 | reloc type in md_apply_fix. */ | |
686 | for (i = 0; i < fc; i++) | |
687 | { | |
688 | const struct powerpc_operand *operand; | |
689 | ||
690 | operand = &powerpc_operands[fixups[i].opindex]; | |
691 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, | |
692 | &fixups[i].exp, | |
693 | (operand->flags & PPC_OPERAND_RELATIVE) != 0, | |
694 | ((bfd_reloc_code_real_type) | |
695 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
696 | } | |
697 | } | |
698 | ||
699 | /* Handle a macro. Gather all the operands, transform them as | |
700 | described by the macro, and call md_assemble recursively. All the | |
701 | operands are separated by commas; we don't accept parentheses | |
702 | around operands here. */ | |
703 | ||
704 | static void | |
705 | ppc_macro (str, macro) | |
706 | char *str; | |
707 | const struct powerpc_macro *macro; | |
708 | { | |
709 | char *operands[10]; | |
710 | int count; | |
711 | char *s; | |
712 | unsigned int len; | |
713 | const char *format; | |
714 | int arg; | |
715 | char *send; | |
716 | char *complete; | |
717 | ||
718 | /* Gather the users operands into the operands array. */ | |
719 | count = 0; | |
720 | s = str; | |
721 | while (1) | |
722 | { | |
723 | if (count >= sizeof operands / sizeof operands[0]) | |
724 | break; | |
725 | operands[count++] = s; | |
726 | s = strchr (s, ','); | |
727 | if (s == (char *) NULL) | |
728 | break; | |
729 | *s++ = '\0'; | |
730 | } | |
731 | ||
732 | if (count != macro->operands) | |
733 | { | |
734 | as_bad ("wrong number of operands"); | |
735 | return; | |
736 | } | |
737 | ||
738 | /* Work out how large the string must be (the size is unbounded | |
739 | because it includes user input). */ | |
740 | len = 0; | |
741 | format = macro->format; | |
742 | while (*format != '\0') | |
743 | { | |
744 | if (*format != '%') | |
745 | { | |
746 | ++len; | |
747 | ++format; | |
748 | } | |
749 | else | |
750 | { | |
751 | arg = strtol (format + 1, &send, 10); | |
752 | know (send != format && arg >= 0 && arg < count); | |
753 | len += strlen (operands[arg]); | |
754 | format = send; | |
755 | } | |
756 | } | |
757 | ||
758 | /* Put the string together. */ | |
759 | complete = s = (char *) alloca (len + 1); | |
760 | format = macro->format; | |
761 | while (*format != '\0') | |
762 | { | |
763 | if (*format != '%') | |
764 | *s++ = *format++; | |
765 | else | |
766 | { | |
767 | arg = strtol (format + 1, &send, 10); | |
768 | strcpy (s, operands[arg]); | |
769 | s += strlen (s); | |
770 | format = send; | |
771 | } | |
772 | } | |
773 | *s = '\0'; | |
774 | ||
775 | /* Assemble the constructed instruction. */ | |
776 | md_assemble (complete); | |
777 | } | |
778 | \f | |
779 | /* Pseudo-op handling. */ | |
780 | ||
781 | /* The .byte pseudo-op. This is similar to the normal .byte | |
782 | pseudo-op, but it can also take a single ASCII string. */ | |
783 | ||
784 | static void | |
785 | ppc_byte (ignore) | |
786 | int ignore; | |
787 | { | |
788 | if (*input_line_pointer != '\"') | |
789 | { | |
790 | cons (1); | |
791 | return; | |
792 | } | |
793 | ||
794 | /* Gather characters. A real double quote is doubled. Unusual | |
795 | characters are not permitted. */ | |
796 | ++input_line_pointer; | |
797 | while (1) | |
798 | { | |
799 | char c; | |
800 | ||
801 | c = *input_line_pointer++; | |
802 | ||
803 | if (c == '\"') | |
804 | { | |
805 | if (*input_line_pointer != '\"') | |
806 | break; | |
807 | ++input_line_pointer; | |
808 | } | |
809 | ||
810 | FRAG_APPEND_1_CHAR (c); | |
811 | } | |
812 | ||
813 | demand_empty_rest_of_line (); | |
814 | } | |
815 | \f | |
816 | #ifdef OBJ_COFF | |
817 | ||
818 | /* XCOFF specific pseudo-op handling. */ | |
819 | ||
820 | /* The .comm and .lcomm pseudo-ops for XCOFF. XCOFF puts common | |
821 | symbols in the .bss segment as though they were local common | |
822 | symbols, and uses a different smclas. */ | |
823 | ||
824 | static void | |
825 | ppc_comm (lcomm) | |
826 | int lcomm; | |
827 | { | |
828 | asection *current_seg = now_seg; | |
829 | subsegT current_subseg = now_subseg; | |
830 | char *name; | |
831 | char endc; | |
832 | char *end_name; | |
833 | offsetT size; | |
834 | offsetT align; | |
835 | symbolS *lcomm_sym = NULL; | |
836 | symbolS *sym; | |
837 | char *pfrag; | |
838 | ||
839 | name = input_line_pointer; | |
840 | endc = get_symbol_end (); | |
841 | end_name = input_line_pointer; | |
842 | *end_name = endc; | |
843 | ||
844 | if (*input_line_pointer != ',') | |
845 | { | |
846 | as_bad ("missing size"); | |
847 | ignore_rest_of_line (); | |
848 | return; | |
849 | } | |
850 | ++input_line_pointer; | |
851 | ||
852 | size = get_absolute_expression (); | |
853 | if (size < 0) | |
854 | { | |
855 | as_bad ("negative size"); | |
856 | ignore_rest_of_line (); | |
857 | return; | |
858 | } | |
859 | ||
860 | if (! lcomm) | |
861 | { | |
862 | /* The third argument to .comm is the alignment. */ | |
863 | if (*input_line_pointer != ',') | |
864 | align = 3; | |
865 | else | |
866 | { | |
867 | ++input_line_pointer; | |
868 | align = get_absolute_expression (); | |
869 | if (align <= 0) | |
870 | { | |
871 | as_warn ("ignoring bad alignment"); | |
872 | align = 3; | |
873 | } | |
874 | } | |
875 | } | |
876 | else | |
877 | { | |
878 | char *lcomm_name; | |
879 | char lcomm_endc; | |
880 | ||
881 | if (size <= 1) | |
882 | align = 0; | |
883 | else if (size <= 2) | |
884 | align = 1; | |
885 | else if (size <= 4) | |
886 | align = 2; | |
887 | else | |
888 | align = 3; | |
889 | ||
890 | /* The third argument to .lcomm appears to be the real local | |
891 | common symbol to create. References to the symbol named in | |
892 | the first argument are turned into references to the third | |
893 | argument. */ | |
894 | if (*input_line_pointer != ',') | |
895 | { | |
896 | as_bad ("missing real symbol name"); | |
897 | ignore_rest_of_line (); | |
898 | return; | |
899 | } | |
900 | ++input_line_pointer; | |
901 | ||
902 | lcomm_name = input_line_pointer; | |
903 | lcomm_endc = get_symbol_end (); | |
904 | ||
905 | lcomm_sym = symbol_find_or_make (lcomm_name); | |
906 | ||
907 | *input_line_pointer = lcomm_endc; | |
908 | } | |
909 | ||
910 | *end_name = '\0'; | |
911 | sym = symbol_find_or_make (name); | |
912 | *end_name = endc; | |
913 | ||
914 | if (S_IS_DEFINED (sym) | |
915 | || S_GET_VALUE (sym) != 0) | |
916 | { | |
917 | as_bad ("attempt to redefine symbol"); | |
918 | ignore_rest_of_line (); | |
919 | return; | |
920 | } | |
921 | ||
922 | record_alignment (bss_section, align); | |
923 | ||
924 | if (! lcomm | |
925 | || ! S_IS_DEFINED (lcomm_sym)) | |
926 | { | |
927 | symbolS *def_sym; | |
928 | offsetT def_size; | |
929 | ||
930 | if (! lcomm) | |
931 | { | |
932 | def_sym = sym; | |
933 | def_size = size; | |
934 | S_SET_EXTERNAL (sym); | |
935 | } | |
936 | else | |
937 | { | |
938 | lcomm_sym->sy_tc.output = 1; | |
939 | def_sym = lcomm_sym; | |
940 | def_size = 0; | |
941 | } | |
942 | ||
943 | subseg_set (bss_section, 1); | |
944 | frag_align (align, 0); | |
945 | ||
946 | def_sym->sy_frag = frag_now; | |
947 | pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, def_sym, | |
948 | def_size, (char *) NULL); | |
949 | *pfrag = 0; | |
950 | S_SET_SEGMENT (def_sym, bss_section); | |
951 | def_sym->sy_tc.align = align; | |
952 | } | |
953 | else if (lcomm) | |
954 | { | |
955 | /* Align the size of lcomm_sym. */ | |
956 | lcomm_sym->sy_frag->fr_offset = | |
957 | ((lcomm_sym->sy_frag->fr_offset + (1 << align) - 1) | |
958 | &~ ((1 << align) - 1)); | |
959 | if (align > lcomm_sym->sy_tc.align) | |
960 | lcomm_sym->sy_tc.align = align; | |
961 | } | |
962 | ||
963 | if (lcomm) | |
964 | { | |
965 | /* Make sym an offset from lcomm_sym. */ | |
966 | S_SET_SEGMENT (sym, bss_section); | |
967 | sym->sy_frag = lcomm_sym->sy_frag; | |
968 | S_SET_VALUE (sym, lcomm_sym->sy_frag->fr_offset); | |
969 | lcomm_sym->sy_frag->fr_offset += size; | |
970 | } | |
971 | ||
972 | subseg_set (current_seg, current_subseg); | |
973 | ||
974 | demand_empty_rest_of_line (); | |
975 | } | |
976 | ||
977 | /* The .csect pseudo-op. This switches us into a different | |
978 | subsegment. The first argument is a symbol whose value is the | |
979 | start of the .csect. In COFF, csect symbols get special aux | |
980 | entries defined by the x_csect field of union internal_auxent. The | |
981 | optional second argument is the alignment (the default is 2). */ | |
982 | ||
983 | static void | |
984 | ppc_csect (ignore) | |
985 | int ignore; | |
986 | { | |
987 | char *name; | |
988 | char endc; | |
989 | symbolS *sym; | |
990 | ||
991 | name = input_line_pointer; | |
992 | endc = get_symbol_end (); | |
993 | ||
994 | sym = symbol_find_or_make (name); | |
995 | ||
996 | *input_line_pointer = endc; | |
997 | ||
998 | if (S_IS_DEFINED (sym)) | |
999 | subseg_set (S_GET_SEGMENT (sym), sym->sy_tc.subseg); | |
1000 | else | |
1001 | { | |
1002 | symbolS **list_ptr; | |
1003 | int after_toc; | |
1004 | symbolS *list; | |
1005 | ||
1006 | /* This is a new csect. We need to look at the symbol class to | |
1007 | figure out whether it should go in the text section or the | |
1008 | data section. */ | |
1009 | after_toc = 0; | |
1010 | switch (sym->sy_tc.class) | |
1011 | { | |
1012 | case XMC_PR: | |
1013 | case XMC_RO: | |
1014 | case XMC_DB: | |
1015 | case XMC_GL: | |
1016 | case XMC_XO: | |
1017 | case XMC_SV: | |
1018 | case XMC_TI: | |
1019 | case XMC_TB: | |
1020 | S_SET_SEGMENT (sym, text_section); | |
1021 | sym->sy_tc.subseg = ppc_text_subsegment; | |
1022 | ++ppc_text_subsegment; | |
1023 | list_ptr = &ppc_text_csects; | |
1024 | break; | |
1025 | case XMC_RW: | |
1026 | case XMC_TC0: | |
1027 | case XMC_TC: | |
1028 | case XMC_DS: | |
1029 | case XMC_UA: | |
1030 | case XMC_BS: | |
1031 | case XMC_UC: | |
1032 | if (ppc_toc_csect->sy_tc.subseg + 1 == ppc_data_subsegment) | |
1033 | after_toc = 1; | |
1034 | S_SET_SEGMENT (sym, data_section); | |
1035 | sym->sy_tc.subseg = ppc_data_subsegment; | |
1036 | ++ppc_data_subsegment; | |
1037 | list_ptr = &ppc_data_csects; | |
1038 | break; | |
1039 | default: | |
1040 | abort (); | |
1041 | } | |
1042 | ||
1043 | subseg_new (segment_name (S_GET_SEGMENT (sym)), sym->sy_tc.subseg); | |
1044 | if (after_toc) | |
1045 | ppc_after_toc_frag = frag_now; | |
1046 | ||
1047 | sym->sy_frag = frag_now; | |
1048 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1049 | ||
1050 | sym->sy_tc.align = 2; | |
1051 | sym->sy_tc.output = 1; | |
1052 | sym->sy_tc.within = sym; | |
1053 | ||
1054 | for (list = *list_ptr; | |
1055 | list->sy_tc.next != (symbolS *) NULL; | |
1056 | list = list->sy_tc.next) | |
1057 | ; | |
1058 | list->sy_tc.next = sym; | |
1059 | ||
1060 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1061 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); | |
1062 | } | |
1063 | ||
1064 | if (*input_line_pointer == ',') | |
1065 | { | |
1066 | ++input_line_pointer; | |
1067 | sym->sy_tc.align = get_absolute_expression (); | |
1068 | } | |
1069 | ||
1070 | ppc_current_csect = sym; | |
1071 | ||
1072 | demand_empty_rest_of_line (); | |
1073 | } | |
1074 | ||
1075 | /* The .extern pseudo-op. We create an undefined symbol. */ | |
1076 | ||
1077 | static void | |
1078 | ppc_extern (ignore) | |
1079 | int ignore; | |
1080 | { | |
1081 | char *name; | |
1082 | char endc; | |
1083 | ||
1084 | name = input_line_pointer; | |
1085 | endc = get_symbol_end (); | |
1086 | ||
1087 | (void) symbol_find_or_make (name); | |
1088 | ||
1089 | *input_line_pointer = endc; | |
1090 | ||
1091 | demand_empty_rest_of_line (); | |
1092 | } | |
1093 | ||
1094 | /* The .lglobl pseudo-op. I think the RS/6000 assembler only needs | |
1095 | this because it can't handle undefined symbols. I think we can | |
1096 | just ignore it. */ | |
1097 | ||
1098 | static void | |
1099 | ppc_lglobl (ignore) | |
1100 | int ignore; | |
1101 | { | |
1102 | s_ignore (0); | |
1103 | } | |
1104 | ||
1105 | /* The .rename pseudo-op. The RS/6000 assembler can rename symbols, | |
1106 | although I don't know why it bothers. */ | |
1107 | ||
1108 | static void | |
1109 | ppc_rename (ignore) | |
1110 | int ignore; | |
1111 | { | |
1112 | char *name; | |
1113 | char endc; | |
1114 | symbolS *sym; | |
1115 | int len; | |
1116 | ||
1117 | name = input_line_pointer; | |
1118 | endc = get_symbol_end (); | |
1119 | ||
1120 | sym = symbol_find_or_make (name); | |
1121 | ||
1122 | *input_line_pointer = endc; | |
1123 | ||
1124 | if (*input_line_pointer != ',') | |
1125 | { | |
1126 | as_bad ("missing rename string"); | |
1127 | ignore_rest_of_line (); | |
1128 | return; | |
1129 | } | |
1130 | ++input_line_pointer; | |
1131 | ||
1132 | sym->sy_tc.real_name = demand_copy_C_string (&len); | |
1133 | ||
1134 | demand_empty_rest_of_line (); | |
1135 | } | |
1136 | ||
1137 | /* The .stabx pseudo-op. This is similar to a normal .stabs | |
1138 | pseudo-op, but slightly different. A sample is | |
1139 | .stabx "main:F-1",.main,142,0 | |
1140 | The first argument is the symbol name to create. The second is the | |
1141 | value, and the third is the storage class. The fourth seems to be | |
1142 | always zero, and I am assuming it is the type. */ | |
1143 | ||
1144 | static void | |
1145 | ppc_stabx (ignore) | |
1146 | int ignore; | |
1147 | { | |
1148 | char *name; | |
1149 | int len; | |
1150 | symbolS *sym; | |
1eeb357e | 1151 | expressionS exp; |
882bdc69 ILT |
1152 | |
1153 | name = demand_copy_C_string (&len); | |
1154 | ||
1155 | if (*input_line_pointer != ',') | |
1156 | { | |
1157 | as_bad ("missing value"); | |
1158 | return; | |
1159 | } | |
1160 | ++input_line_pointer; | |
1161 | ||
1162 | sym = symbol_make (name); | |
1eeb357e ILT |
1163 | |
1164 | (void) expression (&exp); | |
1165 | ||
1166 | switch (exp.X_op) | |
1167 | { | |
1168 | case O_illegal: | |
1169 | case O_absent: | |
1170 | case O_big: | |
1171 | as_bad ("illegal .stabx expression; zero assumed"); | |
1172 | exp.X_add_number = 0; | |
1173 | /* Fall through. */ | |
1174 | case O_constant: | |
1175 | S_SET_VALUE (sym, (valueT) exp.X_add_number); | |
1176 | sym->sy_frag = &zero_address_frag; | |
1177 | break; | |
1178 | ||
1179 | case O_symbol: | |
1180 | if (S_GET_SEGMENT (exp.X_add_symbol) == undefined_section) | |
1181 | sym->sy_value = exp; | |
1182 | else | |
1183 | { | |
1184 | S_SET_VALUE (sym, | |
1185 | exp.X_add_number + S_GET_VALUE (exp.X_add_symbol)); | |
1186 | sym->sy_frag = exp.X_add_symbol->sy_frag; | |
1187 | } | |
1188 | break; | |
1189 | ||
1190 | default: | |
1191 | /* The value is some complex expression. This will probably | |
1192 | fail at some later point, but this is probably the right | |
1193 | thing to do here. */ | |
1194 | sym->sy_value = exp; | |
1195 | break; | |
1196 | } | |
882bdc69 ILT |
1197 | |
1198 | S_SET_SEGMENT (sym, ppc_coff_debug_section); | |
1199 | sym->bsym->flags |= BSF_DEBUGGING; | |
1200 | ||
1201 | if (*input_line_pointer != ',') | |
1202 | { | |
1203 | as_bad ("missing class"); | |
1204 | return; | |
1205 | } | |
1206 | ++input_line_pointer; | |
1207 | ||
1208 | S_SET_STORAGE_CLASS (sym, get_absolute_expression ()); | |
1209 | ||
1210 | if (*input_line_pointer != ',') | |
1211 | { | |
1212 | as_bad ("missing type"); | |
1213 | return; | |
1214 | } | |
1215 | ++input_line_pointer; | |
1216 | ||
1217 | S_SET_DATA_TYPE (sym, get_absolute_expression ()); | |
1218 | ||
1219 | sym->sy_tc.output = 1; | |
1eeb357e ILT |
1220 | |
1221 | if (S_GET_STORAGE_CLASS (sym) == C_STSYM) | |
1222 | sym->sy_tc.within = ppc_current_block; | |
1223 | ||
1224 | if (exp.X_op != O_symbol | |
1225 | || ! S_IS_EXTERNAL (exp.X_add_symbol) | |
1226 | || S_GET_SEGMENT (exp.X_add_symbol) != bss_section) | |
1227 | ppc_frob_label (sym); | |
1228 | else | |
1229 | { | |
1230 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1231 | symbol_append (sym, exp.X_add_symbol, &symbol_rootP, &symbol_lastP); | |
1232 | if (ppc_current_csect->sy_tc.within == exp.X_add_symbol) | |
1233 | ppc_current_csect->sy_tc.within = sym; | |
1234 | } | |
882bdc69 ILT |
1235 | |
1236 | if (strlen (name) > SYMNMLEN) | |
1237 | { | |
1238 | /* For some reason, each name is preceded by a two byte length | |
1239 | and followed by a null byte. */ | |
1240 | ppc_debug_name_section_size += strlen (name) + 3; | |
1241 | } | |
1242 | ||
1243 | demand_empty_rest_of_line (); | |
1244 | } | |
1245 | ||
1246 | /* The .function pseudo-op. This takes several arguments. The first | |
1247 | argument seems to be the external name of the symbol. The second | |
1248 | argment seems to be the label for the start of the function. gcc | |
1249 | uses the same name for both. I have no idea what the third and | |
1250 | fourth arguments are meant to be. The optional fifth argument is | |
1251 | an expression for the size of the function. In COFF this symbol | |
1252 | gets an aux entry like that used for a csect. */ | |
1253 | ||
1254 | static void | |
1255 | ppc_function (ignore) | |
1256 | int ignore; | |
1257 | { | |
1258 | char *name; | |
1259 | char endc; | |
1260 | char *s; | |
1261 | symbolS *ext_sym; | |
1262 | symbolS *lab_sym; | |
1263 | ||
1264 | name = input_line_pointer; | |
1265 | endc = get_symbol_end (); | |
1266 | ||
1267 | /* Ignore any [PR] suffix. */ | |
1268 | name = ppc_canonicalize_symbol_name (name); | |
1269 | s = strchr (name, '['); | |
1270 | if (s != (char *) NULL | |
1271 | && strcmp (s + 1, "PR]") == 0) | |
1272 | *s = '\0'; | |
1273 | ||
1274 | ext_sym = symbol_find_or_make (name); | |
1275 | ||
1276 | *input_line_pointer = endc; | |
1277 | ||
1278 | if (*input_line_pointer != ',') | |
1279 | { | |
1280 | as_bad ("missing symbol name"); | |
1281 | ignore_rest_of_line (); | |
1282 | return; | |
1283 | } | |
1284 | ++input_line_pointer; | |
1285 | ||
1286 | name = input_line_pointer; | |
1287 | endc = get_symbol_end (); | |
1288 | ||
1289 | lab_sym = symbol_find_or_make (name); | |
1290 | ||
1291 | *input_line_pointer = endc; | |
1292 | ||
1293 | if (ext_sym != lab_sym) | |
1294 | { | |
1295 | ext_sym->sy_value.X_op = O_symbol; | |
1296 | ext_sym->sy_value.X_add_symbol = lab_sym; | |
1297 | ext_sym->sy_value.X_op_symbol = NULL; | |
1298 | ext_sym->sy_value.X_add_number = 0; | |
1299 | } | |
1300 | ||
1301 | if (ext_sym->sy_tc.class == -1) | |
1302 | ext_sym->sy_tc.class = XMC_PR; | |
1303 | ext_sym->sy_tc.output = 1; | |
1304 | ||
1305 | if (*input_line_pointer == ',') | |
1306 | { | |
1307 | expressionS ignore; | |
1308 | ||
1309 | /* Ignore the third argument. */ | |
1310 | ++input_line_pointer; | |
1311 | expression (&ignore); | |
1312 | if (*input_line_pointer == ',') | |
1313 | { | |
1314 | /* Ignore the fourth argument. */ | |
1315 | ++input_line_pointer; | |
1316 | expression (&ignore); | |
1317 | if (*input_line_pointer == ',') | |
1318 | { | |
1319 | /* The fifth argument is the function size. */ | |
1320 | ++input_line_pointer; | |
1321 | ext_sym->sy_tc.size = symbol_new ("L0\001", | |
1322 | absolute_section, | |
1323 | (valueT) 0, | |
1324 | &zero_address_frag); | |
1325 | pseudo_set (ext_sym->sy_tc.size); | |
1326 | } | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | S_SET_DATA_TYPE (ext_sym, DT_FCN << N_BTSHFT); | |
1331 | SF_SET_FUNCTION (ext_sym); | |
1332 | SF_SET_PROCESS (ext_sym); | |
1333 | coff_add_linesym (ext_sym); | |
1334 | ||
1335 | demand_empty_rest_of_line (); | |
1336 | } | |
1337 | ||
1338 | /* The .bf pseudo-op. This is just like a COFF C_FCN symbol named | |
1339 | ".bf". */ | |
1340 | ||
1341 | static void | |
1342 | ppc_bf (ignore) | |
1343 | int ignore; | |
1344 | { | |
1345 | symbolS *sym; | |
882bdc69 ILT |
1346 | |
1347 | sym = symbol_make (".bf"); | |
1348 | S_SET_SEGMENT (sym, text_section); | |
1349 | sym->sy_frag = frag_now; | |
1350 | S_SET_VALUE (sym, frag_now_fix ()); | |
1351 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1352 | ||
1eeb357e | 1353 | coff_line_base = get_absolute_expression (); |
882bdc69 ILT |
1354 | |
1355 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1356 | SA_SET_SYM_LNNO (sym, coff_line_base); | |
1357 | ||
1358 | sym->sy_tc.output = 1; | |
1359 | ||
1360 | ppc_frob_label (sym); | |
1361 | ||
1362 | demand_empty_rest_of_line (); | |
1363 | } | |
1364 | ||
1365 | /* The .ef pseudo-op. This is just like a COFF C_FCN symbol named | |
1366 | ".ef", except that the line number is absolute, not relative to the | |
1367 | most recent ".bf" symbol. */ | |
1368 | ||
1369 | static void | |
1370 | ppc_ef (ignore) | |
1371 | int ignore; | |
1372 | { | |
1373 | symbolS *sym; | |
1374 | ||
1375 | sym = symbol_make (".ef"); | |
1376 | S_SET_SEGMENT (sym, text_section); | |
1377 | sym->sy_frag = frag_now; | |
1378 | S_SET_VALUE (sym, frag_now_fix ()); | |
1379 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1380 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1381 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1382 | sym->sy_tc.output = 1; | |
1383 | ||
1384 | ppc_frob_label (sym); | |
1385 | ||
1386 | demand_empty_rest_of_line (); | |
1387 | } | |
1388 | ||
1389 | /* The .bi and .ei pseudo-ops. These take a string argument and | |
1390 | generates a C_BINCL or C_EINCL symbol, which goes at the start of | |
1391 | the symbol list. */ | |
1392 | ||
1393 | static void | |
1394 | ppc_biei (ei) | |
1395 | int ei; | |
1396 | { | |
1397 | char *name; | |
1398 | int len; | |
1399 | symbolS *sym; | |
1400 | symbolS *look; | |
1401 | ||
1402 | name = demand_copy_C_string (&len); | |
1403 | ||
1404 | sym = symbol_make (name); | |
1405 | S_SET_SEGMENT (sym, ppc_coff_debug_section); | |
1406 | sym->bsym->flags |= BSF_DEBUGGING; | |
1407 | ||
1408 | /* FIXME: The value of the .bi or .ei symbol is supposed to be the | |
1409 | offset in the file to the line number entry to use. That is | |
1410 | quite difficult to implement using BFD, so I'm just not doing it. | |
1411 | Sorry. Please add it if you can figure out how. Note that this | |
1412 | approach is the only way to support multiple files in COFF, since | |
1413 | line numbers are associated with function symbols. Note further | |
1414 | that it still doesn't work, since the line numbers are stored as | |
1415 | offsets from a base line number. */ | |
1416 | ||
1417 | S_SET_STORAGE_CLASS (sym, ei ? C_EINCL : C_BINCL); | |
1418 | sym->sy_tc.output = 1; | |
1419 | ||
1420 | for (look = symbol_rootP; | |
1421 | (look != (symbolS *) NULL | |
1422 | && (S_GET_STORAGE_CLASS (look) == C_FILE | |
1423 | || S_GET_STORAGE_CLASS (look) == C_BINCL | |
1424 | || S_GET_STORAGE_CLASS (look) == C_EINCL)); | |
1425 | look = symbol_next (look)) | |
1426 | ; | |
1427 | if (look != (symbolS *) NULL) | |
1428 | { | |
1429 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1430 | symbol_insert (sym, look, &symbol_rootP, &symbol_lastP); | |
1431 | } | |
1432 | ||
1433 | demand_empty_rest_of_line (); | |
1434 | } | |
1435 | ||
1436 | /* The .bs pseudo-op. This generates a C_BSTAT symbol named ".bs". | |
1437 | There is one argument, which is a csect symbol. The value of the | |
1438 | .bs symbol is the index of this csect symbol. */ | |
1439 | ||
1440 | static void | |
1441 | ppc_bs (ignore) | |
1442 | int ignore; | |
1443 | { | |
1444 | char *name; | |
1445 | char endc; | |
1446 | symbolS *csect; | |
1447 | symbolS *sym; | |
1448 | ||
1eeb357e ILT |
1449 | if (ppc_current_block != NULL) |
1450 | as_bad ("nested .bs blocks"); | |
1451 | ||
882bdc69 ILT |
1452 | name = input_line_pointer; |
1453 | endc = get_symbol_end (); | |
1454 | ||
1455 | csect = symbol_find_or_make (name); | |
1456 | ||
1457 | *input_line_pointer = endc; | |
1458 | ||
1459 | sym = symbol_make (".bs"); | |
1460 | S_SET_SEGMENT (sym, now_seg); | |
1461 | S_SET_STORAGE_CLASS (sym, C_BSTAT); | |
1462 | sym->bsym->flags |= BSF_DEBUGGING; | |
1463 | sym->sy_tc.output = 1; | |
1464 | ||
1465 | sym->sy_tc.within = csect; | |
1466 | ||
1467 | ppc_frob_label (sym); | |
1468 | ||
1eeb357e ILT |
1469 | ppc_current_block = sym; |
1470 | ||
882bdc69 ILT |
1471 | demand_empty_rest_of_line (); |
1472 | } | |
1473 | ||
1474 | /* The .es pseudo-op. Generate a C_ESTART symbol named .es. */ | |
1475 | ||
1476 | static void | |
1477 | ppc_es (ignore) | |
1478 | int ignore; | |
1479 | { | |
1480 | symbolS *sym; | |
1481 | ||
1eeb357e ILT |
1482 | if (ppc_current_block == NULL) |
1483 | as_bad (".es without preceding .bs"); | |
1484 | ||
882bdc69 ILT |
1485 | sym = symbol_make (".es"); |
1486 | S_SET_SEGMENT (sym, now_seg); | |
1487 | S_SET_STORAGE_CLASS (sym, C_ESTAT); | |
1488 | sym->bsym->flags |= BSF_DEBUGGING; | |
1489 | sym->sy_tc.output = 1; | |
1490 | ||
1491 | ppc_frob_label (sym); | |
1492 | ||
1eeb357e ILT |
1493 | ppc_current_block = NULL; |
1494 | ||
882bdc69 ILT |
1495 | demand_empty_rest_of_line (); |
1496 | } | |
1497 | ||
1498 | /* The .bb pseudo-op. Generate a C_BLOCK symbol named .bb, with a | |
1499 | line number. */ | |
1500 | ||
1501 | static void | |
1502 | ppc_bb (ignore) | |
1503 | int ignore; | |
1504 | { | |
1505 | symbolS *sym; | |
1506 | ||
1507 | sym = symbol_make (".bb"); | |
1508 | S_SET_SEGMENT (sym, text_section); | |
1509 | sym->sy_frag = frag_now; | |
1510 | S_SET_VALUE (sym, frag_now_fix ()); | |
1511 | S_SET_STORAGE_CLASS (sym, C_BLOCK); | |
1512 | ||
1513 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1514 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1515 | ||
1516 | sym->sy_tc.output = 1; | |
1517 | ||
1518 | ppc_frob_label (sym); | |
1519 | ||
1520 | demand_empty_rest_of_line (); | |
1521 | } | |
1522 | ||
1523 | /* The .eb pseudo-op. Generate a C_BLOCK symbol named .eb, with a | |
1524 | line number. */ | |
1525 | ||
1526 | static void | |
1527 | ppc_eb (ignore) | |
1528 | int ignore; | |
1529 | { | |
1530 | symbolS *sym; | |
1531 | ||
1532 | sym = symbol_make (".eb"); | |
1533 | S_SET_SEGMENT (sym, text_section); | |
1534 | sym->sy_frag = frag_now; | |
1535 | S_SET_VALUE (sym, frag_now_fix ()); | |
1536 | S_SET_STORAGE_CLASS (sym, C_FCN); | |
1537 | S_SET_NUMBER_AUXILIARY (sym, 1); | |
1538 | SA_SET_SYM_LNNO (sym, get_absolute_expression ()); | |
1539 | sym->sy_tc.output = 1; | |
1540 | ||
1541 | ppc_frob_label (sym); | |
1542 | ||
1543 | demand_empty_rest_of_line (); | |
1544 | } | |
1545 | ||
1546 | /* The .toc pseudo-op. Switch to the .toc subsegment. */ | |
1547 | ||
1548 | static void | |
1549 | ppc_toc (ignore) | |
1550 | int ignore; | |
1551 | { | |
1552 | if (ppc_toc_csect != (symbolS *) NULL) | |
1553 | subseg_set (data_section, ppc_toc_csect->sy_tc.subseg); | |
1554 | else | |
1555 | { | |
1556 | subsegT subseg; | |
1557 | symbolS *sym; | |
1558 | symbolS *list; | |
1559 | ||
1560 | subseg = ppc_data_subsegment; | |
1561 | ++ppc_data_subsegment; | |
1562 | ||
1563 | subseg_new (segment_name (data_section), subseg); | |
1564 | ppc_toc_frag = frag_now; | |
1565 | ||
1566 | sym = symbol_find_or_make ("TOC[TC0]"); | |
1567 | sym->sy_frag = frag_now; | |
1568 | S_SET_SEGMENT (sym, data_section); | |
1569 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1570 | sym->sy_tc.subseg = subseg; | |
1571 | sym->sy_tc.output = 1; | |
1572 | sym->sy_tc.within = sym; | |
1573 | ||
1574 | ppc_toc_csect = sym; | |
1575 | ||
1576 | for (list = ppc_data_csects; | |
1577 | list->sy_tc.next != (symbolS *) NULL; | |
1578 | list = list->sy_tc.next) | |
1579 | ; | |
1580 | list->sy_tc.next = sym; | |
1581 | ||
1582 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1583 | symbol_append (sym, list->sy_tc.within, &symbol_rootP, &symbol_lastP); | |
1584 | } | |
1585 | ||
1586 | ppc_current_csect = ppc_toc_csect; | |
1587 | ||
1588 | demand_empty_rest_of_line (); | |
1589 | } | |
1590 | ||
1591 | #endif /* OBJ_COFF */ | |
1592 | \f | |
1593 | /* The .tc pseudo-op. This is used when generating either XCOFF or | |
1594 | ELF. This takes two or more arguments. | |
1595 | ||
1596 | When generating XCOFF output, the first argument is the name to | |
1597 | give to this location in the toc; this will be a symbol with class | |
1598 | TC. The rest of the arguments are 4 byte values to actually put at | |
1599 | this location in the TOC; often there is just one more argument, a | |
1600 | relocateable symbol reference. | |
1601 | ||
1602 | When not generating XCOFF output, the arguments are the same, but | |
1603 | the first argument is simply ignored. */ | |
1604 | ||
1605 | static void | |
1606 | ppc_tc (ignore) | |
1607 | int ignore; | |
1608 | { | |
1609 | #ifdef OBJ_COFF | |
1610 | ||
1611 | /* Define the TOC symbol name. */ | |
1612 | { | |
1613 | char *name; | |
1614 | char endc; | |
1615 | symbolS *sym; | |
1616 | ||
1617 | if (ppc_toc_csect == (symbolS *) NULL | |
1618 | || ppc_toc_csect != ppc_current_csect) | |
1619 | { | |
1620 | as_bad (".tc not in .toc section"); | |
1621 | ignore_rest_of_line (); | |
1622 | return; | |
1623 | } | |
1624 | ||
1625 | name = input_line_pointer; | |
1626 | endc = get_symbol_end (); | |
1627 | ||
1628 | sym = symbol_find_or_make (name); | |
1629 | ||
1630 | *input_line_pointer = endc; | |
1631 | ||
1632 | if (S_IS_DEFINED (sym)) | |
1633 | { | |
1634 | symbolS *label; | |
1635 | ||
1636 | label = ppc_current_csect->sy_tc.within; | |
1637 | if (label->sy_tc.class != XMC_TC0) | |
1638 | { | |
1639 | as_warn (".tc with no label"); | |
1640 | ignore_rest_of_line (); | |
1641 | return; | |
1642 | } | |
1643 | ||
1644 | S_SET_SEGMENT (label, S_GET_SEGMENT (sym)); | |
1645 | label->sy_frag = sym->sy_frag; | |
1646 | S_SET_VALUE (label, S_GET_VALUE (sym)); | |
1647 | ||
1648 | while (! is_end_of_line[(unsigned char) *input_line_pointer]) | |
1649 | ++input_line_pointer; | |
1650 | ||
1651 | return; | |
1652 | } | |
1653 | ||
1654 | S_SET_SEGMENT (sym, now_seg); | |
1655 | sym->sy_frag = frag_now; | |
1656 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
1657 | sym->sy_tc.class = XMC_TC; | |
1658 | sym->sy_tc.output = 1; | |
1659 | ||
1660 | ppc_frob_label (sym); | |
1661 | } | |
1662 | ||
1663 | #else /* ! defined (OBJ_COFF) */ | |
1664 | ||
1665 | /* Skip the TOC symbol name. */ | |
1666 | while (is_part_of_name (*input_line_pointer) | |
1667 | || *input_line_pointer == '[' | |
1668 | || *input_line_pointer == ']' | |
1669 | || *input_line_pointer == '{' | |
1670 | || *input_line_pointer == '}') | |
1671 | ++input_line_pointer; | |
1672 | ||
1eeb357e ILT |
1673 | /* Align to a four byte boundary. */ |
1674 | frag_align (2, 0); | |
1675 | record_alignment (now_seg, 2); | |
1676 | ||
882bdc69 ILT |
1677 | #endif /* ! defined (OBJ_COFF) */ |
1678 | ||
1679 | if (*input_line_pointer != ',') | |
1680 | demand_empty_rest_of_line (); | |
1681 | else | |
1682 | { | |
1683 | ++input_line_pointer; | |
1684 | cons (4); | |
1685 | } | |
1686 | } | |
1687 | \f | |
1688 | #ifdef OBJ_COFF | |
1689 | ||
1690 | /* XCOFF specific symbol and file handling. */ | |
1691 | ||
1692 | /* Canonicalize the symbol name. We use the to force the suffix, if | |
1693 | any, to use square brackets, and to be in upper case. */ | |
1694 | ||
1695 | char * | |
1696 | ppc_canonicalize_symbol_name (name) | |
1697 | char *name; | |
1698 | { | |
1699 | char *s; | |
1700 | ||
1701 | for (s = name; *s != '\0' && *s != '{' && *s != '['; s++) | |
1702 | ; | |
1703 | if (*s != '\0') | |
1704 | { | |
1705 | char brac; | |
1706 | ||
1707 | if (*s == '[') | |
1708 | brac = ']'; | |
1709 | else | |
1710 | { | |
1711 | *s = '['; | |
1712 | brac = '}'; | |
1713 | } | |
1714 | ||
1715 | for (s++; *s != '\0' && *s != brac; s++) | |
1716 | if (islower (*s)) | |
1717 | *s = toupper (*s); | |
1718 | ||
1719 | if (*s == '\0' || s[1] != '\0') | |
1720 | as_bad ("bad symbol suffix"); | |
1721 | ||
1722 | *s = ']'; | |
1723 | } | |
1724 | ||
1725 | return name; | |
1726 | } | |
1727 | ||
1728 | /* Set the class of a symbol based on the suffix, if any. This is | |
1729 | called whenever a new symbol is created. */ | |
1730 | ||
1731 | void | |
1732 | ppc_symbol_new_hook (sym) | |
1733 | symbolS *sym; | |
1734 | { | |
1735 | const char *s; | |
1736 | ||
1737 | sym->sy_tc.next = NULL; | |
1738 | sym->sy_tc.output = 0; | |
1739 | sym->sy_tc.class = -1; | |
1740 | sym->sy_tc.real_name = NULL; | |
1741 | sym->sy_tc.subseg = 0; | |
1742 | sym->sy_tc.align = 0; | |
1743 | sym->sy_tc.size = NULL; | |
1744 | sym->sy_tc.within = NULL; | |
1745 | ||
1746 | s = strchr (S_GET_NAME (sym), '['); | |
1747 | if (s == (const char *) NULL) | |
1748 | { | |
1749 | /* There is no suffix. */ | |
1750 | return; | |
1751 | } | |
1752 | ||
1753 | ++s; | |
1754 | ||
1755 | switch (s[0]) | |
1756 | { | |
1757 | case 'B': | |
1758 | if (strcmp (s, "BS]") == 0) | |
1759 | sym->sy_tc.class = XMC_BS; | |
1760 | break; | |
1761 | case 'D': | |
1762 | if (strcmp (s, "DB]") == 0) | |
1763 | sym->sy_tc.class = XMC_DB; | |
1764 | else if (strcmp (s, "DS]") == 0) | |
1765 | sym->sy_tc.class = XMC_DS; | |
1766 | break; | |
1767 | case 'G': | |
1768 | if (strcmp (s, "GL]") == 0) | |
1769 | sym->sy_tc.class = XMC_GL; | |
1770 | break; | |
1771 | case 'P': | |
1772 | if (strcmp (s, "PR]") == 0) | |
1773 | sym->sy_tc.class = XMC_PR; | |
1774 | break; | |
1775 | case 'R': | |
1776 | if (strcmp (s, "RO]") == 0) | |
1777 | sym->sy_tc.class = XMC_RO; | |
1778 | else if (strcmp (s, "RW]") == 0) | |
1779 | sym->sy_tc.class = XMC_RW; | |
1780 | break; | |
1781 | case 'S': | |
1782 | if (strcmp (s, "SV]") == 0) | |
1783 | sym->sy_tc.class = XMC_SV; | |
1784 | break; | |
1785 | case 'T': | |
1786 | if (strcmp (s, "TC]") == 0) | |
1787 | sym->sy_tc.class = XMC_TC; | |
1788 | else if (strcmp (s, "TI]") == 0) | |
1789 | sym->sy_tc.class = XMC_TI; | |
1790 | else if (strcmp (s, "TB]") == 0) | |
1791 | sym->sy_tc.class = XMC_TB; | |
1eeb357e | 1792 | else if (strcmp (s, "TC0]") == 0 || strcm (s, "T0]") == 0) |
882bdc69 ILT |
1793 | sym->sy_tc.class = XMC_TC0; |
1794 | break; | |
1795 | case 'U': | |
1796 | if (strcmp (s, "UA]") == 0) | |
1797 | sym->sy_tc.class = XMC_UA; | |
1798 | else if (strcmp (s, "UC]") == 0) | |
1799 | sym->sy_tc.class = XMC_UC; | |
1800 | break; | |
1801 | case 'X': | |
1802 | if (strcmp (s, "XO]") == 0) | |
1803 | sym->sy_tc.class = XMC_XO; | |
1804 | break; | |
1805 | } | |
1806 | ||
1807 | if (sym->sy_tc.class == -1) | |
1808 | as_bad ("Unrecognized symbol suffix"); | |
1809 | } | |
1810 | ||
1811 | /* Set the class of a label based on where it is defined. This | |
1812 | handles symbols without suffixes. Also, move the symbol so that it | |
1813 | follows the csect symbol. */ | |
1814 | ||
1815 | void | |
1816 | ppc_frob_label (sym) | |
1817 | symbolS *sym; | |
1818 | { | |
1819 | if (ppc_current_csect != (symbolS *) NULL) | |
1820 | { | |
1821 | if (sym->sy_tc.class == -1) | |
1822 | sym->sy_tc.class = ppc_current_csect->sy_tc.class; | |
1823 | ||
1824 | symbol_remove (sym, &symbol_rootP, &symbol_lastP); | |
1825 | symbol_append (sym, ppc_current_csect->sy_tc.within, &symbol_rootP, | |
1826 | &symbol_lastP); | |
1827 | ppc_current_csect->sy_tc.within = sym; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | /* Change the name of a symbol just before writing it out. Set the | |
1832 | real name if the .rename pseudo-op was used. Otherwise, remove any | |
1833 | class suffix. Return 1 if the symbol should not be included in the | |
1834 | symbol table. */ | |
1835 | ||
1836 | int | |
1837 | ppc_frob_symbol (sym) | |
1838 | symbolS *sym; | |
1839 | { | |
1840 | static symbolS *ppc_last_function; | |
1841 | static symbolS *set_end; | |
1842 | ||
1843 | /* Discard symbols that should not be included in the output symbol | |
1844 | table. */ | |
1845 | if (! sym->sy_used_in_reloc | |
1846 | && ((sym->bsym->flags & BSF_SECTION_SYM) != 0 | |
1847 | || (! S_IS_EXTERNAL (sym) | |
1848 | && ! sym->sy_tc.output | |
1849 | && S_GET_STORAGE_CLASS (sym) != C_FILE))) | |
1850 | return 1; | |
1851 | ||
1852 | if (sym->sy_tc.real_name != (char *) NULL) | |
1853 | S_SET_NAME (sym, sym->sy_tc.real_name); | |
1854 | else | |
1855 | { | |
1856 | const char *name; | |
1857 | const char *s; | |
1858 | ||
1859 | name = S_GET_NAME (sym); | |
1860 | s = strchr (name, '['); | |
1861 | if (s != (char *) NULL) | |
1862 | { | |
1863 | unsigned int len; | |
1864 | char *snew; | |
1865 | ||
1866 | len = s - name; | |
1867 | snew = xmalloc (len + 1); | |
1868 | memcpy (snew, name, len); | |
1869 | snew[len] = '\0'; | |
1870 | ||
1871 | S_SET_NAME (sym, snew); | |
1872 | } | |
1873 | } | |
1874 | ||
1875 | if (set_end != (symbolS *) NULL) | |
1876 | { | |
1877 | SA_SET_SYM_ENDNDX (set_end, sym); | |
1878 | set_end = NULL; | |
1879 | } | |
1880 | ||
1881 | if (SF_GET_FUNCTION (sym)) | |
1882 | { | |
1883 | if (ppc_last_function != (symbolS *) NULL) | |
1884 | as_warn ("two .function pseudo-ops with no intervening .ef"); | |
1885 | ppc_last_function = sym; | |
1886 | if (sym->sy_tc.size != (symbolS *) NULL) | |
1887 | { | |
1888 | resolve_symbol_value (sym->sy_tc.size); | |
1889 | SA_SET_SYM_FSIZE (sym, (long) S_GET_VALUE (sym->sy_tc.size)); | |
1890 | } | |
1891 | } | |
1892 | else if (S_GET_STORAGE_CLASS (sym) == C_FCN | |
1893 | && strcmp (S_GET_NAME (sym), ".ef") == 0) | |
1894 | { | |
1895 | if (ppc_last_function == (symbolS *) NULL) | |
1896 | as_warn (".ef with no preceding .function"); | |
1897 | else | |
1898 | { | |
1899 | set_end = ppc_last_function; | |
1900 | ppc_last_function = NULL; | |
1901 | ||
1902 | /* We don't have a C_EFCN symbol, but we need to force the | |
1903 | COFF backend to believe that it has seen one. */ | |
1904 | coff_last_function = NULL; | |
1905 | } | |
1906 | } | |
1907 | ||
1908 | if (! S_IS_EXTERNAL (sym) | |
1909 | && (sym->bsym->flags & BSF_SECTION_SYM) == 0 | |
1910 | && S_GET_STORAGE_CLASS (sym) != C_FILE | |
1911 | && S_GET_STORAGE_CLASS (sym) != C_FCN | |
1912 | && S_GET_STORAGE_CLASS (sym) != C_BSTAT | |
1913 | && S_GET_STORAGE_CLASS (sym) != C_ESTAT | |
1914 | && S_GET_SEGMENT (sym) != ppc_coff_debug_section) | |
1915 | S_SET_STORAGE_CLASS (sym, C_HIDEXT); | |
1916 | ||
1917 | if (S_GET_STORAGE_CLASS (sym) == C_EXT | |
1918 | || S_GET_STORAGE_CLASS (sym) == C_HIDEXT) | |
1919 | { | |
1920 | int i; | |
1921 | union internal_auxent *a; | |
1922 | ||
1923 | /* Create a csect aux. */ | |
1924 | i = S_GET_NUMBER_AUXILIARY (sym); | |
1925 | S_SET_NUMBER_AUXILIARY (sym, i + 1); | |
1926 | a = &coffsymbol (sym->bsym)->native[i + 1].u.auxent; | |
1927 | if (sym->sy_tc.class == XMC_TC0) | |
1928 | { | |
1929 | /* This is the TOC table. */ | |
1930 | know (strcmp (S_GET_NAME (sym), "TOC") == 0); | |
1931 | a->x_csect.x_scnlen.l = 0; | |
1932 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; | |
1933 | } | |
1934 | else if (sym->sy_tc.subseg != 0) | |
1935 | { | |
1936 | /* This is a csect symbol. x_scnlen is the size of the | |
1937 | csect. */ | |
1938 | if (sym->sy_tc.next == (symbolS *) NULL) | |
1939 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, | |
1940 | S_GET_SEGMENT (sym)) | |
1941 | - S_GET_VALUE (sym)); | |
1942 | else | |
1943 | { | |
1944 | resolve_symbol_value (sym->sy_tc.next); | |
1945 | a->x_csect.x_scnlen.l = (S_GET_VALUE (sym->sy_tc.next) | |
1946 | - S_GET_VALUE (sym)); | |
1947 | } | |
1948 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_SD; | |
1949 | } | |
1950 | else if (S_GET_SEGMENT (sym) == bss_section) | |
1951 | { | |
1952 | /* This is a common symbol. */ | |
1953 | a->x_csect.x_scnlen.l = sym->sy_frag->fr_offset; | |
1954 | a->x_csect.x_smtyp = (sym->sy_tc.align << 3) | XTY_CM; | |
1955 | if (S_IS_EXTERNAL (sym)) | |
1956 | sym->sy_tc.class = XMC_RW; | |
1957 | else | |
1958 | sym->sy_tc.class = XMC_BS; | |
1959 | } | |
1960 | else if (! S_IS_DEFINED (sym)) | |
1961 | { | |
1962 | /* This is an external symbol. */ | |
1963 | a->x_csect.x_scnlen.l = 0; | |
1964 | a->x_csect.x_smtyp = XTY_ER; | |
1965 | } | |
1966 | else if (sym->sy_tc.class == XMC_TC) | |
1967 | { | |
1968 | symbolS *next; | |
1969 | ||
1970 | /* This is a TOC definition. x_scnlen is the size of the | |
1971 | TOC entry. */ | |
1972 | next = symbol_next (sym); | |
1973 | while (next->sy_tc.class == XMC_TC0) | |
1974 | next = symbol_next (next); | |
1975 | if (next == (symbolS *) NULL | |
1976 | || next->sy_tc.class != XMC_TC) | |
1977 | { | |
1978 | if (ppc_after_toc_frag == (fragS *) NULL) | |
1979 | a->x_csect.x_scnlen.l = (bfd_section_size (stdoutput, | |
1980 | data_section) | |
1981 | - S_GET_VALUE (sym)); | |
1982 | else | |
1983 | a->x_csect.x_scnlen.l = (ppc_after_toc_frag->fr_address | |
1984 | - S_GET_VALUE (sym)); | |
1985 | } | |
1986 | else | |
1987 | { | |
1988 | resolve_symbol_value (next); | |
1989 | a->x_csect.x_scnlen.l = (S_GET_VALUE (next) | |
1990 | - S_GET_VALUE (sym)); | |
1991 | } | |
1992 | a->x_csect.x_smtyp = (2 << 3) | XTY_SD; | |
1993 | } | |
1994 | else | |
1995 | { | |
1996 | symbolS *csect; | |
1997 | ||
1998 | /* This is a normal symbol definition. x_scnlen is the | |
1999 | symbol index of the containing csect. */ | |
2000 | if (S_GET_SEGMENT (sym) == text_section) | |
2001 | csect = ppc_text_csects; | |
2002 | else if (S_GET_SEGMENT (sym) == data_section) | |
2003 | csect = ppc_data_csects; | |
2004 | else | |
2005 | abort (); | |
2006 | ||
2007 | /* Skip the initial dummy symbol. */ | |
2008 | csect = csect->sy_tc.next; | |
2009 | ||
2010 | if (csect == (symbolS *) NULL) | |
2011 | a->x_csect.x_scnlen.l = 0; | |
2012 | else | |
2013 | { | |
2014 | while (csect->sy_tc.next != (symbolS *) NULL) | |
2015 | { | |
2016 | resolve_symbol_value (csect->sy_tc.next); | |
2017 | if (S_GET_VALUE (csect->sy_tc.next) > S_GET_VALUE (sym)) | |
2018 | break; | |
2019 | csect = csect->sy_tc.next; | |
2020 | } | |
2021 | ||
2022 | a->x_csect.x_scnlen.p = coffsymbol (csect->bsym)->native; | |
2023 | coffsymbol (sym->bsym)->native[i + 1].fix_scnlen = 1; | |
2024 | } | |
2025 | a->x_csect.x_smtyp = XTY_LD; | |
2026 | } | |
2027 | ||
2028 | a->x_csect.x_parmhash = 0; | |
2029 | a->x_csect.x_snhash = 0; | |
2030 | if (sym->sy_tc.class == -1) | |
2031 | a->x_csect.x_smclas = XMC_PR; | |
2032 | else | |
2033 | a->x_csect.x_smclas = sym->sy_tc.class; | |
2034 | a->x_csect.x_stab = 0; | |
2035 | a->x_csect.x_snstab = 0; | |
2036 | } | |
2037 | else if (S_GET_STORAGE_CLASS (sym) == C_BSTAT) | |
2038 | { | |
2039 | /* We want the value to be the symbol index of the referenced | |
2040 | csect symbol. BFD will do that for us if we set the right | |
2041 | flags. */ | |
2042 | S_SET_VALUE (sym, | |
2043 | (valueT) coffsymbol (sym->sy_tc.within->bsym)->native); | |
2044 | coffsymbol (sym->bsym)->native->fix_value = 1; | |
2045 | } | |
1eeb357e ILT |
2046 | else if (S_GET_STORAGE_CLASS (sym) == C_STSYM) |
2047 | { | |
2048 | symbolS *block; | |
2049 | symbolS *csect; | |
2050 | ||
2051 | /* The value is the offset from the enclosing csect. */ | |
2052 | block = sym->sy_tc.within; | |
2053 | csect = block->sy_tc.within; | |
2054 | resolve_symbol_value (csect); | |
2055 | S_SET_VALUE (sym, S_GET_VALUE (sym) - S_GET_VALUE (csect)); | |
2056 | } | |
882bdc69 ILT |
2057 | |
2058 | return 0; | |
2059 | } | |
2060 | ||
2061 | /* Set the VMA for a section. This is called on all the sections in | |
2062 | turn. */ | |
2063 | ||
2064 | void | |
2065 | ppc_frob_section (sec) | |
2066 | asection *sec; | |
2067 | { | |
2068 | static bfd_size_type vma = 0; | |
2069 | ||
2070 | bfd_set_section_vma (stdoutput, sec, vma); | |
2071 | vma += bfd_section_size (stdoutput, sec); | |
2072 | } | |
2073 | ||
2074 | /* Adjust the file by adding a .debug section if needed. */ | |
2075 | ||
2076 | void | |
2077 | ppc_frob_file () | |
2078 | { | |
2079 | if (ppc_debug_name_section_size > 0) | |
2080 | { | |
2081 | asection *sec; | |
2082 | ||
2083 | sec = bfd_make_section (stdoutput, ".debug"); | |
2084 | if (sec == (asection *) NULL | |
2085 | || ! bfd_set_section_size (stdoutput, sec, | |
2086 | ppc_debug_name_section_size) | |
2087 | || ! bfd_set_section_flags (stdoutput, sec, | |
2088 | SEC_HAS_CONTENTS | SEC_LOAD)) | |
2089 | as_fatal ("can't make .debug section"); | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | #endif /* OBJ_COFF */ | |
2094 | \f | |
2095 | /* Turn a string in input_line_pointer into a floating point constant | |
2096 | of type type, and store the appropriate bytes in *litp. The number | |
2097 | of LITTLENUMS emitted is stored in *sizep . An error message is | |
2098 | returned, or NULL on OK. */ | |
2099 | ||
2100 | char * | |
2101 | md_atof (type, litp, sizep) | |
2102 | int type; | |
2103 | char *litp; | |
2104 | int *sizep; | |
2105 | { | |
2106 | int prec; | |
2107 | LITTLENUM_TYPE words[4]; | |
2108 | char *t; | |
2109 | int i; | |
2110 | ||
2111 | switch (type) | |
2112 | { | |
2113 | case 'f': | |
2114 | prec = 2; | |
2115 | break; | |
2116 | ||
2117 | case 'd': | |
2118 | prec = 4; | |
2119 | break; | |
2120 | ||
2121 | default: | |
2122 | *sizep = 0; | |
2123 | return "bad call to md_atof"; | |
2124 | } | |
2125 | ||
2126 | t = atof_ieee (input_line_pointer, type, words); | |
2127 | if (t) | |
2128 | input_line_pointer = t; | |
2129 | ||
2130 | *sizep = prec * 2; | |
2131 | ||
2132 | if (ppc_big_endian) | |
2133 | { | |
2134 | for (i = 0; i < prec; i++) | |
2135 | { | |
2136 | md_number_to_chars (litp, (valueT) words[i], 2); | |
2137 | litp += 2; | |
2138 | } | |
2139 | } | |
2140 | else | |
2141 | { | |
2142 | for (i = prec - 1; i >= 0; i--) | |
2143 | { | |
2144 | md_number_to_chars (litp, (valueT) words[i], 2); | |
2145 | litp += 2; | |
2146 | } | |
2147 | } | |
2148 | ||
2149 | return NULL; | |
2150 | } | |
2151 | ||
2152 | /* Write a value out to the object file, using the appropriate | |
2153 | endianness. */ | |
2154 | ||
2155 | void | |
2156 | md_number_to_chars (buf, val, n) | |
2157 | char *buf; | |
2158 | valueT val; | |
2159 | int n; | |
2160 | { | |
2161 | if (ppc_big_endian) | |
2162 | number_to_chars_bigendian (buf, val, n); | |
2163 | else | |
2164 | number_to_chars_littleendian (buf, val, n); | |
2165 | } | |
2166 | ||
2167 | /* Align a section (I don't know why this is machine dependent). */ | |
2168 | ||
2169 | valueT | |
2170 | md_section_align (seg, addr) | |
2171 | asection *seg; | |
2172 | valueT addr; | |
2173 | { | |
2174 | int align = bfd_get_section_alignment (stdoutput, seg); | |
2175 | ||
2176 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
2177 | } | |
2178 | ||
2179 | /* We don't have any form of relaxing. */ | |
2180 | ||
2181 | int | |
2182 | md_estimate_size_before_relax (fragp, seg) | |
2183 | fragS *fragp; | |
2184 | asection *seg; | |
2185 | { | |
2186 | abort (); | |
2187 | } | |
2188 | ||
2189 | const relax_typeS md_relax_table[] = | |
2190 | { | |
2191 | { 0 } | |
2192 | }; | |
2193 | ||
2194 | /* Convert a machine dependent frag. We never generate these. */ | |
2195 | ||
2196 | void | |
2197 | md_convert_frag (abfd, sec, fragp) | |
2198 | bfd *abfd; | |
2199 | asection *sec; | |
2200 | fragS *fragp; | |
2201 | { | |
2202 | abort (); | |
2203 | } | |
2204 | ||
2205 | /* Parse an operand that is machine-specific. We just return without | |
2206 | modifying the expression if we have nothing to do. */ | |
2207 | ||
2208 | /*ARGSUSED*/ | |
2209 | void | |
2210 | md_operand (expressionP) | |
2211 | expressionS *expressionP; | |
2212 | { | |
2213 | } | |
2214 | ||
2215 | /* We have no need to default values of symbols. */ | |
2216 | ||
2217 | /*ARGSUSED*/ | |
2218 | symbolS * | |
2219 | md_undefined_symbol (name) | |
2220 | char *name; | |
2221 | { | |
2222 | return 0; | |
2223 | } | |
2224 | \f | |
2225 | /* Functions concerning relocs. */ | |
2226 | ||
2227 | /* The location from which a PC relative jump should be calculated, | |
2228 | given a PC relative reloc. */ | |
2229 | ||
2230 | long | |
2231 | md_pcrel_from (fixp) | |
2232 | fixS *fixp; | |
2233 | { | |
2234 | #ifdef OBJ_ELF | |
2235 | if (fixp->fx_addsy != (symbolS *) NULL | |
2236 | && ! S_IS_DEFINED (fixp->fx_addsy)) | |
2237 | return 0; | |
2238 | #endif | |
2239 | ||
2240 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
2241 | } | |
2242 | ||
2243 | #ifdef OBJ_COFF | |
2244 | ||
2245 | /* This is called to see whether a fixup should be adjusted to use a | |
2246 | section symbol. We take the opportunity to change a fixup against | |
2247 | a symbol in the TOC subsegment into a reloc against the | |
1eeb357e | 2248 | corresponding .tc symbol. */ |
882bdc69 ILT |
2249 | |
2250 | int | |
2251 | ppc_fix_adjustable (fix) | |
2252 | fixS *fix; | |
2253 | { | |
2254 | valueT val; | |
2255 | ||
1eeb357e ILT |
2256 | resolve_symbol_value (fix->fx_addsy); |
2257 | val = S_GET_VALUE (fix->fx_addsy); | |
882bdc69 ILT |
2258 | if (ppc_toc_csect != (symbolS *) NULL |
2259 | && fix->fx_addsy != (symbolS *) NULL | |
2260 | && fix->fx_addsy != ppc_toc_csect | |
2261 | && S_GET_SEGMENT (fix->fx_addsy) == data_section | |
2262 | && val >= ppc_toc_frag->fr_address | |
2263 | && (ppc_after_toc_frag == (fragS *) NULL | |
2264 | || val < ppc_after_toc_frag->fr_address)) | |
2265 | { | |
2266 | symbolS *sy; | |
2267 | ||
2268 | for (sy = symbol_next (ppc_toc_csect); | |
2269 | sy != (symbolS *) NULL; | |
2270 | sy = symbol_next (sy)) | |
2271 | { | |
2272 | if (sy->sy_tc.class == XMC_TC0) | |
2273 | continue; | |
2274 | if (sy->sy_tc.class != XMC_TC) | |
2275 | break; | |
1eeb357e ILT |
2276 | resolve_symbol_value (sy); |
2277 | if (val == S_GET_VALUE (sy)) | |
882bdc69 ILT |
2278 | { |
2279 | fix->fx_addsy = sy; | |
2280 | fix->fx_addnumber = val - ppc_toc_frag->fr_address; | |
2281 | return 0; | |
2282 | } | |
2283 | } | |
2284 | ||
2285 | as_bad_where (fix->fx_file, fix->fx_line, | |
2286 | "symbol in .toc does not match any .tc"); | |
2287 | } | |
2288 | ||
2289 | /* Possibly adjust the reloc to be against the csect. */ | |
2290 | if (fix->fx_addsy != (symbolS *) NULL | |
2291 | && fix->fx_addsy->sy_tc.subseg == 0 | |
2292 | && fix->fx_addsy->sy_tc.class != XMC_TC0 | |
2293 | && fix->fx_addsy->sy_tc.class != XMC_TC | |
2294 | && S_GET_SEGMENT (fix->fx_addsy) != bss_section) | |
2295 | { | |
2296 | symbolS *csect; | |
2297 | ||
2298 | if (S_GET_SEGMENT (fix->fx_addsy) == text_section) | |
2299 | csect = ppc_text_csects; | |
2300 | else if (S_GET_SEGMENT (fix->fx_addsy) == data_section) | |
2301 | csect = ppc_data_csects; | |
2302 | else | |
2303 | abort (); | |
2304 | ||
2305 | /* Skip the initial dummy symbol. */ | |
2306 | csect = csect->sy_tc.next; | |
2307 | ||
2308 | if (csect != (symbolS *) NULL) | |
2309 | { | |
2310 | while (csect->sy_tc.next != (symbolS *) NULL | |
2311 | && (csect->sy_tc.next->sy_frag->fr_address | |
2312 | <= fix->fx_addsy->sy_frag->fr_address)) | |
2313 | csect = csect->sy_tc.next; | |
2314 | ||
2315 | fix->fx_offset += (S_GET_VALUE (fix->fx_addsy) | |
1eeb357e | 2316 | - csect->sy_frag->fr_address); |
882bdc69 ILT |
2317 | fix->fx_addsy = csect; |
2318 | } | |
2319 | } | |
2320 | ||
2321 | /* Adjust a reloc against a .lcomm symbol to be against the base | |
2322 | .lcomm. */ | |
2323 | if (fix->fx_addsy != (symbolS *) NULL | |
2324 | && S_GET_SEGMENT (fix->fx_addsy) == bss_section | |
2325 | && ! S_IS_EXTERNAL (fix->fx_addsy)) | |
2326 | { | |
1eeb357e ILT |
2327 | resolve_symbol_value (fix->fx_addsy->sy_frag->fr_symbol); |
2328 | fix->fx_offset += (S_GET_VALUE (fix->fx_addsy) | |
2329 | - S_GET_VALUE (fix->fx_addsy->sy_frag->fr_symbol)); | |
882bdc69 ILT |
2330 | fix->fx_addsy = fix->fx_addsy->sy_frag->fr_symbol; |
2331 | } | |
2332 | ||
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | #endif | |
2337 | ||
2338 | /* See whether a symbol is in the TOC section. */ | |
2339 | ||
2340 | static int | |
2341 | ppc_is_toc_sym (sym) | |
2342 | symbolS *sym; | |
2343 | { | |
2344 | #ifdef OBJ_COFF | |
2345 | return sym->sy_tc.class == XMC_TC; | |
2346 | #else | |
2347 | return strcmp (segment_name (S_GET_SEGMENT (sym)), ".got") == 0; | |
2348 | #endif | |
2349 | } | |
2350 | ||
2351 | /* Apply a fixup to the object code. This is called for all the | |
2352 | fixups we generated by the call to fix_new_exp, above. In the call | |
2353 | above we used a reloc code which was the largest legal reloc code | |
2354 | plus the operand index. Here we undo that to recover the operand | |
2355 | index. At this point all symbol values should be fully resolved, | |
2356 | and we attempt to completely resolve the reloc. If we can not do | |
2357 | that, we determine the correct reloc code and put it back in the | |
2358 | fixup. */ | |
2359 | ||
2360 | int | |
2361 | md_apply_fix (fixp, valuep) | |
2362 | fixS *fixp; | |
2363 | valueT *valuep; | |
2364 | { | |
2365 | valueT value; | |
2366 | ||
2367 | /* FIXME FIXME FIXME: The value we are passed in *valuep includes | |
2368 | the symbol values. Since we are using BFD_ASSEMBLER, if we are | |
2369 | doing this relocation the code in write.c is going to call | |
2370 | bfd_perform_relocation, which is also going to use the symbol | |
2371 | value. That means that if the reloc is fully resolved we want to | |
2372 | use *valuep since bfd_perform_relocation is not being used. | |
2373 | However, if the reloc is not fully resolved we do not want to use | |
2374 | *valuep, and must use fx_offset instead. However, if the reloc | |
2375 | is PC relative, we do want to use *valuep since it includes the | |
2376 | result of md_pcrel_from. This is confusing. */ | |
2377 | ||
2378 | if (fixp->fx_addsy == (symbolS *) NULL) | |
2379 | { | |
2380 | value = *valuep; | |
2381 | fixp->fx_done = 1; | |
2382 | } | |
2383 | else if (fixp->fx_pcrel) | |
2384 | value = *valuep; | |
2385 | else | |
2386 | { | |
2387 | value = fixp->fx_offset; | |
2388 | if (fixp->fx_subsy != (symbolS *) NULL) | |
2389 | { | |
2390 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
2391 | value -= S_GET_VALUE (fixp->fx_subsy); | |
2392 | else | |
2393 | { | |
2394 | /* We can't actually support subtracting a symbol. */ | |
2395 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2396 | "expression too complex"); | |
2397 | } | |
2398 | } | |
2399 | } | |
2400 | ||
2401 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) | |
2402 | { | |
2403 | int opindex; | |
2404 | const struct powerpc_operand *operand; | |
2405 | char *where; | |
2406 | unsigned long insn; | |
2407 | ||
2408 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; | |
2409 | ||
2410 | operand = &powerpc_operands[opindex]; | |
2411 | ||
1eeb357e ILT |
2412 | #ifdef OBJ_COFF |
2413 | /* It appears that an instruction like | |
2414 | l 9,LC..1(30) | |
2415 | when LC..1 is not a TOC symbol does not generate a reloc. It | |
2416 | uses the offset of LC..1 within its csect. However, .long | |
2417 | LC..1 will generate a reloc. I can't find any documentation | |
2418 | on how these cases are to be distinguished, so this is a wild | |
2419 | guess. These cases are generated by gcc -mminimal-toc. */ | |
2420 | if ((operand->flags & PPC_OPERAND_PARENS) != 0 | |
2421 | && operand->bits == 16 | |
2422 | && operand->shift == 0 | |
2423 | && operand->insert == NULL | |
2424 | && fixp->fx_addsy != NULL | |
2425 | && fixp->fx_addsy->sy_tc.subseg != 0 | |
2426 | && fixp->fx_addsy->sy_tc.class != XMC_TC | |
2427 | && fixp->fx_addsy->sy_tc.class != XMC_TC0 | |
2428 | && S_GET_SEGMENT (fixp->fx_addsy) != bss_section) | |
2429 | { | |
2430 | value = fixp->fx_offset; | |
2431 | fixp->fx_done = 1; | |
2432 | } | |
2433 | #endif | |
2434 | ||
882bdc69 ILT |
2435 | /* Fetch the instruction, insert the fully resolved operand |
2436 | value, and stuff the instruction back again. */ | |
2437 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
2438 | if (ppc_big_endian) | |
2439 | insn = bfd_getb32 ((unsigned char *) where); | |
2440 | else | |
2441 | insn = bfd_getl32 ((unsigned char *) where); | |
2442 | insn = ppc_insert_operand (insn, operand, (offsetT) value, | |
2443 | fixp->fx_file, fixp->fx_line); | |
2444 | if (ppc_big_endian) | |
2445 | bfd_putb32 ((bfd_vma) insn, (unsigned char *) where); | |
2446 | else | |
2447 | bfd_putl32 ((bfd_vma) insn, (unsigned char *) where); | |
2448 | ||
2449 | if (fixp->fx_done) | |
2450 | { | |
2451 | /* Nothing else to do here. */ | |
2452 | return 1; | |
2453 | } | |
2454 | ||
2455 | /* Determine a BFD reloc value based on the operand information. | |
2456 | We are only prepared to turn a few of the operands into | |
2457 | relocs. | |
2458 | FIXME: We need to handle the DS field at the very least. | |
2459 | FIXME: Handling 16 bit branches would also be reasonable. | |
2460 | FIXME: Selecting the reloc type is a bit haphazard; perhaps | |
2461 | there should be a new field in the operand table. */ | |
2462 | if ((operand->flags & PPC_OPERAND_RELATIVE) != 0 | |
2463 | && operand->bits == 26 | |
2464 | && operand->shift == 0) | |
2465 | fixp->fx_r_type = BFD_RELOC_PPC_B26; | |
2466 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0 | |
2467 | && operand->bits == 26 | |
2468 | && operand->shift == 0) | |
2469 | fixp->fx_r_type = BFD_RELOC_PPC_BA26; | |
2470 | else if ((operand->flags & PPC_OPERAND_PARENS) != 0 | |
2471 | && operand->bits == 16 | |
2472 | && operand->shift == 0 | |
2473 | && operand->insert == NULL | |
2474 | && fixp->fx_addsy != NULL | |
2475 | && ppc_is_toc_sym (fixp->fx_addsy)) | |
2476 | { | |
2477 | fixp->fx_size = 2; | |
2478 | if (ppc_big_endian) | |
2479 | fixp->fx_where += 2; | |
2480 | fixp->fx_r_type = BFD_RELOC_PPC_TOC16; | |
2481 | } | |
2482 | else | |
2483 | { | |
2484 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2485 | "unresolved expression that must be resolved"); | |
2486 | fixp->fx_done = 1; | |
2487 | return 1; | |
2488 | } | |
2489 | } | |
2490 | else | |
2491 | { | |
2492 | switch (fixp->fx_r_type) | |
2493 | { | |
2494 | case BFD_RELOC_32: | |
2495 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2496 | value, 4); | |
2497 | break; | |
2498 | case BFD_RELOC_16: | |
2499 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2500 | value, 2); | |
2501 | break; | |
2502 | case BFD_RELOC_8: | |
2503 | md_number_to_chars (fixp->fx_frag->fr_literal + fixp->fx_where, | |
2504 | value, 1); | |
2505 | break; | |
2506 | default: | |
2507 | abort (); | |
2508 | } | |
2509 | } | |
2510 | ||
2511 | #ifdef OBJ_ELF | |
2512 | fixp->fx_addnumber = value; | |
2513 | #else | |
2514 | if (fixp->fx_r_type != BFD_RELOC_PPC_TOC16) | |
2515 | fixp->fx_addnumber = 0; | |
2516 | else | |
2517 | { | |
2518 | /* We want to use the offset within the data segment of the | |
2519 | symbol, not the actual VMA of the symbol. */ | |
2520 | fixp->fx_addnumber = | |
2521 | - bfd_get_section_vma (stdoutput, S_GET_SEGMENT (fixp->fx_addsy)); | |
2522 | } | |
2523 | #endif | |
2524 | ||
2525 | return 1; | |
2526 | } | |
2527 | ||
2528 | /* Generate a reloc for a fixup. */ | |
2529 | ||
2530 | arelent * | |
2531 | tc_gen_reloc (seg, fixp) | |
2532 | asection *seg; | |
2533 | fixS *fixp; | |
2534 | { | |
2535 | arelent *reloc; | |
2536 | ||
2537 | reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent)); | |
2538 | ||
2539 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
2540 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2541 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2542 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2543 | { | |
2544 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2545 | "reloc not supported by object file format"); | |
2546 | return NULL; | |
2547 | } | |
2548 | reloc->addend = fixp->fx_addnumber; | |
2549 | ||
882bdc69 ILT |
2550 | return reloc; |
2551 | } |