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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
d24652ee | 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003 |
ee890fe2 SS |
3 | Free Software Foundation, Inc. |
4 | Contributed by Apple Computer Inc. | |
5 | ||
6 | This file is part of GNU CC. | |
7 | ||
8 | GNU CC is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GNU CC is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU CC; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "config.h" | |
24 | #include "system.h" | |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
ee890fe2 SS |
27 | #include "rtl.h" |
28 | #include "regs.h" | |
29 | #include "hard-reg-set.h" | |
30 | #include "real.h" | |
31 | #include "insn-config.h" | |
32 | #include "conditions.h" | |
33 | #include "insn-flags.h" | |
34 | #include "output.h" | |
35 | #include "insn-attr.h" | |
36 | #include "flags.h" | |
37 | #include "tree.h" | |
38 | #include "expr.h" | |
39 | #include "reload.h" | |
ee890fe2 SS |
40 | #include "function.h" |
41 | #include "ggc.h" | |
3ac88239 | 42 | #include "langhooks.h" |
245ff137 | 43 | #include "tm_p.h" |
ee890fe2 SS |
44 | |
45 | static int machopic_data_defined_p PARAMS ((const char *)); | |
df56a27f | 46 | static void update_non_lazy_ptrs PARAMS ((const char *)); |
4e08ba6c | 47 | static void update_stubs PARAMS ((const char *)); |
ee890fe2 | 48 | |
ee890fe2 SS |
49 | int |
50 | name_needs_quotes (name) | |
51 | const char *name; | |
52 | { | |
53 | int c; | |
54 | while ((c = *name++) != '\0') | |
0df6c2c7 | 55 | if (! ISIDNUM (c)) |
ee890fe2 SS |
56 | return 1; |
57 | return 0; | |
58 | } | |
59 | ||
60 | /* | |
61 | * flag_pic = 1 ... generate only indirections | |
62 | * flag_pic = 2 ... generate indirections and pure code | |
63 | */ | |
64 | ||
65 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic | |
66 | reference, which will not be changed. */ | |
67 | ||
e2500fed | 68 | static GTY(()) tree machopic_defined_list; |
ee890fe2 SS |
69 | |
70 | enum machopic_addr_class | |
71 | machopic_classify_ident (ident) | |
72 | tree ident; | |
73 | { | |
74 | const char *name = IDENTIFIER_POINTER (ident); | |
75 | int lprefix = (((name[0] == '*' || name[0] == '&') | |
76 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
77 | || ( name[0] == '_' | |
78 | && name[1] == 'O' | |
79 | && name[2] == 'B' | |
80 | && name[3] == 'J' | |
81 | && name[4] == 'C' | |
82 | && name[5] == '_')); | |
df56a27f | 83 | tree temp; |
ee890fe2 | 84 | |
df56a27f | 85 | if (name[0] != '!') |
ee890fe2 | 86 | { |
df56a27f | 87 | /* Here if no special encoding to be found. */ |
ee890fe2 SS |
88 | if (lprefix) |
89 | { | |
90 | const char *name = IDENTIFIER_POINTER (ident); | |
91 | int len = strlen (name); | |
92 | ||
93 | if ((len > 5 && !strcmp (name + len - 5, "$stub")) | |
94 | || (len > 6 && !strcmp (name + len - 6, "$stub\""))) | |
95 | return MACHOPIC_DEFINED_FUNCTION; | |
96 | return MACHOPIC_DEFINED_DATA; | |
97 | } | |
98 | ||
99 | for (temp = machopic_defined_list; | |
100 | temp != NULL_TREE; | |
101 | temp = TREE_CHAIN (temp)) | |
102 | { | |
103 | if (ident == TREE_VALUE (temp)) | |
104 | return MACHOPIC_DEFINED_DATA; | |
105 | } | |
106 | ||
107 | if (TREE_ASM_WRITTEN (ident)) | |
108 | return MACHOPIC_DEFINED_DATA; | |
109 | ||
110 | return MACHOPIC_UNDEFINED; | |
111 | } | |
112 | ||
df56a27f SS |
113 | else if (name[1] == 'D') |
114 | return MACHOPIC_DEFINED_DATA; | |
ee890fe2 | 115 | |
df56a27f SS |
116 | else if (name[1] == 'T') |
117 | return MACHOPIC_DEFINED_FUNCTION; | |
ee890fe2 | 118 | |
b7fb9feb TC |
119 | /* It is possible that someone is holding a "stale" name, which has |
120 | since been defined. See if there is a "defined" name (i.e, | |
121 | different from NAME only in having a '!D_' or a '!T_' instead of | |
122 | a '!d_' or '!t_' prefix) in the identifier hash tables. If so, say | |
123 | that this identifier is defined. */ | |
124 | else if (name[1] == 'd' || name[1] == 't') | |
125 | { | |
126 | char *new_name; | |
127 | new_name = (char *)alloca (strlen (name) + 1); | |
128 | strcpy (new_name, name); | |
129 | new_name[1] = (name[1] == 'd') ? 'D' : 'T'; | |
130 | if (maybe_get_identifier (new_name) != NULL) | |
131 | return (name[1] == 'd') ? MACHOPIC_DEFINED_DATA | |
132 | : MACHOPIC_DEFINED_FUNCTION; | |
133 | } | |
134 | ||
ee890fe2 SS |
135 | for (temp = machopic_defined_list; temp != NULL_TREE; temp = TREE_CHAIN (temp)) |
136 | { | |
137 | if (ident == TREE_VALUE (temp)) | |
138 | { | |
df56a27f | 139 | if (name[1] == 'T') |
ee890fe2 SS |
140 | return MACHOPIC_DEFINED_FUNCTION; |
141 | else | |
142 | return MACHOPIC_DEFINED_DATA; | |
143 | } | |
144 | } | |
145 | ||
df56a27f | 146 | if (name[1] == 't' || name[1] == 'T') |
ee890fe2 SS |
147 | { |
148 | if (lprefix) | |
149 | return MACHOPIC_DEFINED_FUNCTION; | |
150 | else | |
151 | return MACHOPIC_UNDEFINED_FUNCTION; | |
152 | } | |
153 | else | |
154 | { | |
155 | if (lprefix) | |
156 | return MACHOPIC_DEFINED_DATA; | |
157 | else | |
158 | return MACHOPIC_UNDEFINED_DATA; | |
159 | } | |
160 | } | |
161 | ||
162 | ||
163 | enum machopic_addr_class | |
164 | machopic_classify_name (name) | |
165 | const char *name; | |
166 | { | |
167 | return machopic_classify_ident (get_identifier (name)); | |
168 | } | |
169 | ||
170 | int | |
171 | machopic_ident_defined_p (ident) | |
172 | tree ident; | |
173 | { | |
174 | switch (machopic_classify_ident (ident)) | |
175 | { | |
176 | case MACHOPIC_UNDEFINED: | |
177 | case MACHOPIC_UNDEFINED_DATA: | |
178 | case MACHOPIC_UNDEFINED_FUNCTION: | |
179 | return 0; | |
180 | default: | |
181 | return 1; | |
182 | } | |
183 | } | |
184 | ||
185 | static int | |
186 | machopic_data_defined_p (name) | |
187 | const char *name; | |
188 | { | |
189 | switch (machopic_classify_ident (get_identifier (name))) | |
190 | { | |
191 | case MACHOPIC_DEFINED_DATA: | |
192 | return 1; | |
193 | default: | |
194 | return 0; | |
195 | } | |
196 | } | |
197 | ||
198 | int | |
199 | machopic_name_defined_p (name) | |
200 | const char *name; | |
201 | { | |
202 | return machopic_ident_defined_p (get_identifier (name)); | |
203 | } | |
204 | ||
205 | void | |
206 | machopic_define_ident (ident) | |
207 | tree ident; | |
208 | { | |
209 | if (!machopic_ident_defined_p (ident)) | |
210 | machopic_defined_list = | |
211 | tree_cons (NULL_TREE, ident, machopic_defined_list); | |
212 | } | |
213 | ||
214 | void | |
215 | machopic_define_name (name) | |
216 | const char *name; | |
217 | { | |
218 | machopic_define_ident (get_identifier (name)); | |
219 | } | |
220 | ||
ee890fe2 | 221 | /* This is a static to make inline functions work. The rtx |
6788f5ca | 222 | representing the PIC base symbol always points to here. |
ee890fe2 | 223 | |
6788f5ca | 224 | FIXME: The rest of the compiler doesn't expect strings to change. */ |
ee890fe2 | 225 | |
6788f5ca GK |
226 | static GTY(()) char * function_base; |
227 | static GTY(()) const char * function_base_func_name; | |
17211ab5 | 228 | static GTY(()) int current_pic_label_num; |
ee890fe2 | 229 | |
92c1a778 | 230 | const char * |
ee890fe2 SS |
231 | machopic_function_base_name () |
232 | { | |
6788f5ca | 233 | const char *current_name; |
ee890fe2 | 234 | |
ab82a49f AP |
235 | /* if dynamic-no-pic is on, we should not get here */ |
236 | if (MACHO_DYNAMIC_NO_PIC_P) | |
237 | abort (); | |
6788f5ca GK |
238 | current_name = |
239 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); | |
ee890fe2 | 240 | |
6788f5ca | 241 | if (function_base_func_name != current_name) |
ee890fe2 SS |
242 | { |
243 | current_function_uses_pic_offset_table = 1; | |
244 | ||
245 | /* Save mucho space and time. Some of the C++ mangled names are over | |
246 | 700 characters long! Note that we produce a label containing a '-' | |
247 | if the function we're compiling is an Objective-C method, as evinced | |
248 | by the incredibly scientific test below. This is because code in | |
249 | rs6000.c makes the same ugly test when loading the PIC reg. */ | |
250 | ||
6788f5ca GK |
251 | /* It's hard to describe just how ugly this is. The reason for |
252 | the '%011d' is that after a PCH load, we can't change the | |
253 | size of the string, because PCH will have uniqued it and | |
254 | allocated it in the string pool. */ | |
255 | if (function_base == NULL) | |
256 | function_base = | |
257 | (char *) ggc_alloc_string ("", sizeof ("*\"L12345678901$pb\"")); | |
258 | ||
ee890fe2 SS |
259 | ++current_pic_label_num; |
260 | if (*current_name == '+' || *current_name == '-') | |
6788f5ca | 261 | sprintf (function_base, "*\"L-%010d$pb\"", current_pic_label_num); |
ee890fe2 | 262 | else |
6788f5ca | 263 | sprintf (function_base, "*\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 | 264 | |
6788f5ca | 265 | function_base_func_name = current_name; |
ee890fe2 SS |
266 | } |
267 | ||
268 | return function_base; | |
269 | } | |
270 | ||
e2500fed | 271 | static GTY(()) tree machopic_non_lazy_pointers; |
ee890fe2 SS |
272 | |
273 | /* Return a non-lazy pointer name corresponding to the given name, | |
274 | either by finding it in our list of pointer names, or by generating | |
275 | a new one. */ | |
276 | ||
92c1a778 | 277 | const char * |
ee890fe2 SS |
278 | machopic_non_lazy_ptr_name (name) |
279 | const char *name; | |
280 | { | |
7ae8cf75 | 281 | const char *temp_name; |
ee890fe2 SS |
282 | tree temp, ident = get_identifier (name); |
283 | ||
284 | for (temp = machopic_non_lazy_pointers; | |
285 | temp != NULL_TREE; | |
286 | temp = TREE_CHAIN (temp)) | |
287 | { | |
288 | if (ident == TREE_VALUE (temp)) | |
289 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
290 | } | |
291 | ||
772c5265 | 292 | name = darwin_strip_name_encoding (name); |
df56a27f SS |
293 | |
294 | /* Try again, but comparing names this time. */ | |
295 | for (temp = machopic_non_lazy_pointers; | |
296 | temp != NULL_TREE; | |
297 | temp = TREE_CHAIN (temp)) | |
298 | { | |
299 | if (TREE_VALUE (temp)) | |
300 | { | |
301 | temp_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); | |
772c5265 | 302 | temp_name = darwin_strip_name_encoding (temp_name); |
df56a27f SS |
303 | if (strcmp (name, temp_name) == 0) |
304 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
305 | } | |
306 | } | |
307 | ||
ee890fe2 SS |
308 | { |
309 | char *buffer; | |
310 | tree ptr_name; | |
311 | ||
312 | buffer = alloca (strlen (name) + 20); | |
313 | ||
314 | strcpy (buffer, "&L"); | |
315 | if (name[0] == '*') | |
316 | strcat (buffer, name+1); | |
317 | else | |
318 | { | |
319 | strcat (buffer, "_"); | |
320 | strcat (buffer, name); | |
321 | } | |
322 | ||
323 | strcat (buffer, "$non_lazy_ptr"); | |
324 | ptr_name = get_identifier (buffer); | |
325 | ||
326 | machopic_non_lazy_pointers | |
327 | = tree_cons (ptr_name, ident, machopic_non_lazy_pointers); | |
328 | ||
329 | TREE_USED (machopic_non_lazy_pointers) = 0; | |
330 | ||
331 | return IDENTIFIER_POINTER (ptr_name); | |
332 | } | |
333 | } | |
334 | ||
e2500fed | 335 | static GTY(()) tree machopic_stubs; |
ee890fe2 SS |
336 | |
337 | /* Return the name of the stub corresponding to the given name, | |
338 | generating a new stub name if necessary. */ | |
339 | ||
92c1a778 | 340 | const char * |
ee890fe2 SS |
341 | machopic_stub_name (name) |
342 | const char *name; | |
343 | { | |
344 | tree temp, ident = get_identifier (name); | |
93913281 SS |
345 | const char *tname; |
346 | ||
ee890fe2 SS |
347 | for (temp = machopic_stubs; |
348 | temp != NULL_TREE; | |
349 | temp = TREE_CHAIN (temp)) | |
350 | { | |
351 | if (ident == TREE_VALUE (temp)) | |
352 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
93913281 SS |
353 | tname = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
354 | if (strcmp (name, tname) == 0) | |
355 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
356 | /* A library call name might not be section-encoded yet, so try | |
357 | it against a stripped name. */ | |
358 | if (name[0] != '!' | |
359 | && tname[0] == '!' | |
360 | && strcmp (name, tname + 4) == 0) | |
4e08ba6c | 361 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); |
ee890fe2 SS |
362 | } |
363 | ||
772c5265 | 364 | name = darwin_strip_name_encoding (name); |
df56a27f | 365 | |
ee890fe2 SS |
366 | { |
367 | char *buffer; | |
368 | tree ptr_name; | |
369 | int needs_quotes = name_needs_quotes (name); | |
370 | ||
371 | buffer = alloca (strlen (name) + 20); | |
372 | ||
373 | if (needs_quotes) | |
374 | strcpy (buffer, "&\"L"); | |
375 | else | |
376 | strcpy (buffer, "&L"); | |
377 | if (name[0] == '*') | |
378 | { | |
379 | strcat (buffer, name+1); | |
380 | } | |
381 | else | |
382 | { | |
383 | strcat (buffer, "_"); | |
384 | strcat (buffer, name); | |
385 | } | |
386 | ||
387 | if (needs_quotes) | |
388 | strcat (buffer, "$stub\""); | |
389 | else | |
390 | strcat (buffer, "$stub"); | |
391 | ptr_name = get_identifier (buffer); | |
392 | ||
393 | machopic_stubs = tree_cons (ptr_name, ident, machopic_stubs); | |
394 | TREE_USED (machopic_stubs) = 0; | |
395 | ||
396 | return IDENTIFIER_POINTER (ptr_name); | |
397 | } | |
398 | } | |
399 | ||
400 | void | |
401 | machopic_validate_stub_or_non_lazy_ptr (name, validate_stub) | |
402 | const char *name; | |
403 | int validate_stub; | |
404 | { | |
7ae8cf75 | 405 | const char *real_name; |
df56a27f | 406 | tree temp, ident = get_identifier (name), id2; |
ee890fe2 SS |
407 | |
408 | for (temp = (validate_stub ? machopic_stubs : machopic_non_lazy_pointers); | |
409 | temp != NULL_TREE; | |
410 | temp = TREE_CHAIN (temp)) | |
411 | if (ident == TREE_PURPOSE (temp)) | |
412 | { | |
413 | /* Mark both the stub or non-lazy pointer as well as the | |
414 | original symbol as being referenced. */ | |
415 | TREE_USED (temp) = 1; | |
416 | if (TREE_CODE (TREE_VALUE (temp)) == IDENTIFIER_NODE) | |
417 | TREE_SYMBOL_REFERENCED (TREE_VALUE (temp)) = 1; | |
772c5265 RH |
418 | real_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
419 | real_name = darwin_strip_name_encoding (real_name); | |
df56a27f SS |
420 | id2 = maybe_get_identifier (real_name); |
421 | if (id2) | |
422 | TREE_SYMBOL_REFERENCED (id2) = 1; | |
ee890fe2 SS |
423 | } |
424 | } | |
425 | ||
426 | /* Transform ORIG, which may be any data source, to the corresponding | |
427 | source using indirections. */ | |
428 | ||
429 | rtx | |
430 | machopic_indirect_data_reference (orig, reg) | |
431 | rtx orig, reg; | |
432 | { | |
433 | rtx ptr_ref = orig; | |
434 | ||
435 | if (! MACHOPIC_INDIRECT) | |
436 | return orig; | |
437 | ||
438 | if (GET_CODE (orig) == SYMBOL_REF) | |
439 | { | |
440 | const char *name = XSTR (orig, 0); | |
441 | ||
ab82a49f AP |
442 | int defined = machopic_data_defined_p (name); |
443 | ||
444 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
445 | { | |
446 | #if defined (TARGET_TOC) | |
447 | emit_insn (gen_macho_high (reg, orig)); | |
448 | emit_insn (gen_macho_low (reg, reg, orig)); | |
449 | #else | |
450 | /* some other cpu -- writeme! */ | |
451 | abort (); | |
452 | #endif | |
453 | return reg; | |
454 | } | |
455 | else if (defined) | |
ee890fe2 | 456 | { |
7ae8cf75 | 457 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
ee890fe2 SS |
458 | rtx pic_base = gen_rtx (SYMBOL_REF, Pmode, |
459 | machopic_function_base_name ()); | |
460 | rtx offset = gen_rtx (CONST, Pmode, | |
461 | gen_rtx (MINUS, Pmode, orig, pic_base)); | |
7ae8cf75 | 462 | #endif |
ee890fe2 SS |
463 | |
464 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
465 | rtx hi_sum_reg = reg; | |
466 | ||
467 | if (reg == NULL) | |
468 | abort (); | |
469 | ||
470 | emit_insn (gen_rtx (SET, Pmode, hi_sum_reg, | |
471 | gen_rtx (PLUS, Pmode, pic_offset_table_rtx, | |
472 | gen_rtx (HIGH, Pmode, offset)))); | |
473 | emit_insn (gen_rtx (SET, Pmode, reg, | |
474 | gen_rtx (LO_SUM, Pmode, hi_sum_reg, offset))); | |
475 | ||
476 | orig = reg; | |
477 | #else | |
478 | #if defined (HAVE_lo_sum) | |
479 | if (reg == 0) abort (); | |
480 | ||
481 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
482 | gen_rtx (HIGH, Pmode, offset))); | |
483 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
484 | gen_rtx (LO_SUM, Pmode, reg, offset))); | |
485 | emit_insn (gen_rtx (USE, VOIDmode, | |
486 | gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM))); | |
487 | ||
488 | orig = gen_rtx (PLUS, Pmode, pic_offset_table_rtx, reg); | |
489 | #endif | |
490 | #endif | |
491 | return orig; | |
492 | } | |
493 | ||
494 | ptr_ref = gen_rtx (SYMBOL_REF, Pmode, | |
495 | machopic_non_lazy_ptr_name (name)); | |
496 | ||
497 | ptr_ref = gen_rtx_MEM (Pmode, ptr_ref); | |
498 | RTX_UNCHANGING_P (ptr_ref) = 1; | |
499 | ||
500 | return ptr_ref; | |
501 | } | |
502 | else if (GET_CODE (orig) == CONST) | |
503 | { | |
504 | rtx base, result; | |
505 | ||
506 | /* legitimize both operands of the PLUS */ | |
507 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
508 | { | |
509 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
510 | reg); | |
511 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
512 | (base == reg ? 0 : reg)); | |
513 | } | |
514 | else | |
515 | return orig; | |
516 | ||
517 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 518 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 519 | else |
ed8908e7 | 520 | result = gen_rtx (PLUS, Pmode, base, orig); |
ee890fe2 | 521 | |
ee890fe2 SS |
522 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
523 | { | |
524 | if (reg) | |
525 | { | |
526 | emit_move_insn (reg, result); | |
527 | result = reg; | |
528 | } | |
529 | else | |
530 | { | |
531 | result = force_reg (GET_MODE (result), result); | |
532 | } | |
533 | } | |
534 | ||
535 | return result; | |
536 | ||
537 | } | |
538 | else if (GET_CODE (orig) == MEM) | |
539 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
540 | /* When the target is i386, this code prevents crashes due to the | |
541 | compiler's ignorance on how to move the PIC base register to | |
542 | other registers. (The reload phase sometimes introduces such | |
543 | insns.) */ | |
544 | else if (GET_CODE (orig) == PLUS | |
545 | && GET_CODE (XEXP (orig, 0)) == REG | |
546 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
547 | #ifdef I386 | |
548 | /* Prevent the same register from being erroneously used | |
549 | as both the base and index registers. */ | |
550 | && GET_CODE (XEXP (orig, 1)) == CONST | |
551 | #endif | |
552 | && reg) | |
553 | { | |
554 | emit_move_insn (reg, XEXP (orig, 0)); | |
555 | XEXP (ptr_ref, 0) = reg; | |
556 | } | |
557 | return ptr_ref; | |
558 | } | |
559 | ||
ee890fe2 SS |
560 | /* Transform TARGET (a MEM), which is a function call target, to the |
561 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
562 | ||
563 | rtx | |
564 | machopic_indirect_call_target (target) | |
565 | rtx target; | |
566 | { | |
567 | if (GET_CODE (target) != MEM) | |
568 | return target; | |
569 | ||
570 | if (MACHOPIC_INDIRECT && GET_CODE (XEXP (target, 0)) == SYMBOL_REF) | |
571 | { | |
572 | enum machine_mode mode = GET_MODE (XEXP (target, 0)); | |
573 | const char *name = XSTR (XEXP (target, 0), 0); | |
574 | ||
b7fb9feb TC |
575 | /* If the name is already defined, we need do nothing. */ |
576 | if (name[0] == '!' && name[1] == 'T') | |
577 | return target; | |
578 | ||
579 | if (!machopic_name_defined_p (name)) | |
ee890fe2 SS |
580 | { |
581 | const char *stub_name = machopic_stub_name (name); | |
582 | ||
583 | XEXP (target, 0) = gen_rtx (SYMBOL_REF, mode, stub_name); | |
584 | RTX_UNCHANGING_P (target) = 1; | |
585 | } | |
586 | } | |
587 | ||
588 | return target; | |
589 | } | |
590 | ||
591 | rtx | |
592 | machopic_legitimize_pic_address (orig, mode, reg) | |
593 | rtx orig, reg; | |
594 | enum machine_mode mode; | |
595 | { | |
596 | rtx pic_ref = orig; | |
597 | ||
ab82a49f | 598 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
599 | return orig; |
600 | ||
601 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
602 | if (GET_CODE (orig) == LABEL_REF | |
603 | || (GET_CODE (orig) == SYMBOL_REF | |
604 | )) | |
605 | { | |
606 | /* addr(foo) = &func+(foo-func) */ | |
607 | rtx pic_base; | |
608 | ||
609 | orig = machopic_indirect_data_reference (orig, reg); | |
610 | ||
611 | if (GET_CODE (orig) == PLUS | |
612 | && GET_CODE (XEXP (orig, 0)) == REG) | |
613 | { | |
614 | if (reg == 0) | |
615 | return force_reg (mode, orig); | |
616 | ||
617 | emit_move_insn (reg, orig); | |
618 | return reg; | |
619 | } | |
620 | ||
ab82a49f AP |
621 | /* if dynamic-no-pic then use 0 as the pic base */ |
622 | if (MACHO_DYNAMIC_NO_PIC_P) | |
623 | pic_base = CONST0_RTX (Pmode); | |
624 | else | |
ee890fe2 SS |
625 | pic_base = gen_rtx (SYMBOL_REF, Pmode, machopic_function_base_name ()); |
626 | ||
627 | if (GET_CODE (orig) == MEM) | |
628 | { | |
629 | if (reg == 0) | |
630 | { | |
631 | if (reload_in_progress) | |
632 | abort (); | |
633 | else | |
634 | reg = gen_reg_rtx (Pmode); | |
635 | } | |
636 | ||
637 | #ifdef HAVE_lo_sum | |
ab82a49f AP |
638 | if (MACHO_DYNAMIC_NO_PIC_P |
639 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
640 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
641 | { | |
642 | #if defined (TARGET_TOC) /* ppc */ | |
643 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
644 | rtx asym = XEXP (orig, 0); | |
645 | rtx mem; | |
646 | ||
647 | emit_insn (gen_macho_high (temp_reg, asym)); | |
648 | mem = gen_rtx_MEM (GET_MODE (orig), | |
649 | gen_rtx (LO_SUM, Pmode, temp_reg, asym)); | |
650 | RTX_UNCHANGING_P (mem) = 1; | |
651 | emit_insn (gen_rtx (SET, VOIDmode, reg, mem)); | |
652 | #else | |
653 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
654 | abort (); | |
655 | #endif | |
656 | pic_ref = reg; | |
657 | } | |
658 | else | |
ee890fe2 SS |
659 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
660 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
661 | { | |
662 | rtx offset = gen_rtx (CONST, Pmode, | |
663 | gen_rtx (MINUS, Pmode, | |
664 | XEXP (orig, 0), pic_base)); | |
665 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
666 | /* Generating a new reg may expose opportunities for | |
667 | common subexpression elimination. */ | |
668 | rtx hi_sum_reg = | |
669 | (reload_in_progress ? reg : gen_reg_rtx (SImode)); | |
670 | ||
671 | emit_insn (gen_rtx (SET, Pmode, hi_sum_reg, | |
672 | gen_rtx (PLUS, Pmode, | |
673 | pic_offset_table_rtx, | |
674 | gen_rtx (HIGH, Pmode, offset)))); | |
675 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
676 | gen_rtx (MEM, GET_MODE (orig), | |
677 | gen_rtx (LO_SUM, Pmode, | |
678 | hi_sum_reg, offset)))); | |
679 | pic_ref = reg; | |
680 | ||
681 | #else | |
682 | emit_insn (gen_rtx (USE, VOIDmode, | |
683 | gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM))); | |
684 | ||
685 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
686 | gen_rtx (HIGH, Pmode, | |
687 | gen_rtx (CONST, Pmode, offset)))); | |
688 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
689 | gen_rtx (LO_SUM, Pmode, reg, | |
690 | gen_rtx (CONST, Pmode, offset)))); | |
691 | pic_ref = gen_rtx (PLUS, Pmode, | |
692 | pic_offset_table_rtx, reg); | |
693 | #endif | |
694 | } | |
695 | else | |
696 | #endif /* HAVE_lo_sum */ | |
697 | { | |
698 | rtx pic = pic_offset_table_rtx; | |
699 | if (GET_CODE (pic) != REG) | |
700 | { | |
701 | emit_move_insn (reg, pic); | |
702 | pic = reg; | |
703 | } | |
704 | #if 0 | |
705 | emit_insn (gen_rtx (USE, VOIDmode, | |
706 | gen_rtx (REG, Pmode, PIC_OFFSET_TABLE_REGNUM))); | |
707 | #endif | |
708 | ||
709 | pic_ref = gen_rtx (PLUS, Pmode, | |
710 | pic, | |
711 | gen_rtx (CONST, Pmode, | |
712 | gen_rtx (MINUS, Pmode, | |
713 | XEXP (orig, 0), | |
714 | pic_base))); | |
715 | } | |
716 | ||
717 | #if !defined (TARGET_TOC) | |
ee890fe2 SS |
718 | emit_move_insn (reg, pic_ref); |
719 | pic_ref = gen_rtx (MEM, GET_MODE (orig), reg); | |
720 | #endif | |
b069de3b | 721 | RTX_UNCHANGING_P (pic_ref) = 1; |
ee890fe2 SS |
722 | } |
723 | else | |
724 | { | |
725 | ||
726 | #ifdef HAVE_lo_sum | |
727 | if (GET_CODE (orig) == SYMBOL_REF | |
728 | || GET_CODE (orig) == LABEL_REF) | |
729 | { | |
730 | rtx offset = gen_rtx (CONST, Pmode, | |
731 | gen_rtx (MINUS, Pmode, orig, pic_base)); | |
732 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
733 | rtx hi_sum_reg; | |
734 | ||
735 | if (reg == 0) | |
736 | { | |
737 | if (reload_in_progress) | |
738 | abort (); | |
739 | else | |
740 | reg = gen_reg_rtx (SImode); | |
741 | } | |
742 | ||
743 | hi_sum_reg = reg; | |
744 | ||
745 | emit_insn (gen_rtx (SET, Pmode, hi_sum_reg, | |
ab82a49f AP |
746 | (MACHO_DYNAMIC_NO_PIC_P) |
747 | ? gen_rtx (HIGH, Pmode, offset) | |
748 | : gen_rtx (PLUS, Pmode, | |
ee890fe2 SS |
749 | pic_offset_table_rtx, |
750 | gen_rtx (HIGH, Pmode, offset)))); | |
751 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
752 | gen_rtx (LO_SUM, Pmode, | |
753 | hi_sum_reg, offset))); | |
754 | pic_ref = reg; | |
b069de3b | 755 | RTX_UNCHANGING_P (pic_ref) = 1; |
ee890fe2 SS |
756 | #else |
757 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
758 | gen_rtx (HIGH, Pmode, offset))); | |
759 | emit_insn (gen_rtx (SET, VOIDmode, reg, | |
760 | gen_rtx (LO_SUM, Pmode, reg, offset))); | |
761 | pic_ref = gen_rtx (PLUS, Pmode, | |
762 | pic_offset_table_rtx, reg); | |
b069de3b | 763 | RTX_UNCHANGING_P (pic_ref) = 1; |
ee890fe2 SS |
764 | #endif |
765 | } | |
766 | else | |
767 | #endif /* HAVE_lo_sum */ | |
768 | { | |
769 | if (GET_CODE (orig) == REG) | |
770 | { | |
771 | return orig; | |
772 | } | |
773 | else | |
774 | { | |
775 | rtx pic = pic_offset_table_rtx; | |
776 | if (GET_CODE (pic) != REG) | |
777 | { | |
778 | emit_move_insn (reg, pic); | |
779 | pic = reg; | |
780 | } | |
781 | #if 0 | |
782 | emit_insn (gen_rtx (USE, VOIDmode, | |
783 | pic_offset_table_rtx)); | |
784 | #endif | |
785 | pic_ref = gen_rtx (PLUS, Pmode, | |
786 | pic, | |
787 | gen_rtx (CONST, Pmode, | |
788 | gen_rtx (MINUS, Pmode, | |
789 | orig, pic_base))); | |
790 | } | |
791 | } | |
792 | } | |
793 | ||
ee890fe2 SS |
794 | if (GET_CODE (pic_ref) != REG) |
795 | { | |
796 | if (reg != 0) | |
797 | { | |
798 | emit_move_insn (reg, pic_ref); | |
799 | return reg; | |
800 | } | |
801 | else | |
802 | { | |
803 | return force_reg (mode, pic_ref); | |
804 | } | |
805 | } | |
806 | else | |
807 | { | |
808 | return pic_ref; | |
809 | } | |
810 | } | |
811 | ||
812 | else if (GET_CODE (orig) == SYMBOL_REF) | |
813 | return orig; | |
814 | ||
815 | else if (GET_CODE (orig) == PLUS | |
816 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
817 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
818 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
819 | && XEXP (orig, 0) != pic_offset_table_rtx | |
820 | && GET_CODE (XEXP (orig, 1)) != REG) | |
821 | ||
822 | { | |
823 | rtx base; | |
824 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
825 | ||
826 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
827 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
828 | Pmode, (base == reg ? 0 : reg)); | |
829 | if (GET_CODE (orig) == CONST_INT) | |
830 | { | |
ed8908e7 | 831 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
832 | is_complex = 1; |
833 | } | |
834 | else | |
ed8908e7 | 835 | pic_ref = gen_rtx (PLUS, Pmode, base, orig); |
ee890fe2 SS |
836 | |
837 | if (RTX_UNCHANGING_P (base) && RTX_UNCHANGING_P (orig)) | |
838 | RTX_UNCHANGING_P (pic_ref) = 1; | |
839 | ||
840 | if (reg && is_complex) | |
841 | { | |
842 | emit_move_insn (reg, pic_ref); | |
843 | pic_ref = reg; | |
844 | } | |
845 | /* Likewise, should we set special REG_NOTEs here? */ | |
846 | } | |
847 | ||
848 | else if (GET_CODE (orig) == CONST) | |
849 | { | |
850 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
851 | } | |
852 | ||
853 | else if (GET_CODE (orig) == MEM | |
854 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
855 | { | |
856 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
857 | ||
858 | addr = gen_rtx (MEM, GET_MODE (orig), addr); | |
859 | RTX_UNCHANGING_P (addr) = RTX_UNCHANGING_P (orig); | |
860 | emit_move_insn (reg, addr); | |
861 | pic_ref = reg; | |
862 | } | |
863 | ||
864 | return pic_ref; | |
865 | } | |
866 | ||
867 | ||
868 | void | |
869 | machopic_finish (asm_out_file) | |
870 | FILE *asm_out_file; | |
871 | { | |
872 | tree temp; | |
873 | ||
874 | for (temp = machopic_stubs; | |
875 | temp != NULL_TREE; | |
876 | temp = TREE_CHAIN (temp)) | |
877 | { | |
91dc3130 KG |
878 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
879 | const char *stub_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
ee890fe2 SS |
880 | char *sym; |
881 | char *stub; | |
ee890fe2 SS |
882 | |
883 | if (! TREE_USED (temp)) | |
884 | continue; | |
885 | ||
b7fb9feb TC |
886 | /* If the symbol is actually defined, we don't need a stub. */ |
887 | if (sym_name[0] == '!' && sym_name[1] == 'T') | |
888 | continue; | |
889 | ||
772c5265 | 890 | sym_name = darwin_strip_name_encoding (sym_name); |
ee890fe2 SS |
891 | |
892 | sym = alloca (strlen (sym_name) + 2); | |
893 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
894 | strcpy (sym, sym_name + 1); | |
895 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
896 | strcpy (sym, sym_name); | |
897 | else | |
898 | sym[0] = '_', strcpy (sym + 1, sym_name); | |
899 | ||
900 | stub = alloca (strlen (stub_name) + 2); | |
901 | if (stub_name[0] == '*' || stub_name[0] == '&') | |
902 | strcpy (stub, stub_name + 1); | |
903 | else | |
904 | stub[0] = '_', strcpy (stub + 1, stub_name); | |
905 | ||
906 | machopic_output_stub (asm_out_file, sym, stub); | |
907 | } | |
908 | ||
909 | for (temp = machopic_non_lazy_pointers; | |
910 | temp != NULL_TREE; | |
911 | temp = TREE_CHAIN (temp)) | |
912 | { | |
7ae8cf75 KG |
913 | const char *const sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
914 | const char *const lazy_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
ee890fe2 SS |
915 | |
916 | if (! TREE_USED (temp)) | |
917 | continue; | |
918 | ||
3f64e543 | 919 | if (machopic_ident_defined_p (TREE_VALUE (temp))) |
ee890fe2 SS |
920 | { |
921 | data_section (); | |
c8af3574 | 922 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
ee890fe2 SS |
923 | assemble_label (lazy_name); |
924 | assemble_integer (gen_rtx (SYMBOL_REF, Pmode, sym_name), | |
c8af3574 RH |
925 | GET_MODE_SIZE (Pmode), |
926 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 SS |
927 | } |
928 | else | |
929 | { | |
930 | machopic_nl_symbol_ptr_section (); | |
931 | assemble_name (asm_out_file, lazy_name); | |
932 | fprintf (asm_out_file, ":\n"); | |
933 | ||
934 | fprintf (asm_out_file, "\t.indirect_symbol "); | |
935 | assemble_name (asm_out_file, sym_name); | |
936 | fprintf (asm_out_file, "\n"); | |
937 | ||
c8af3574 RH |
938 | assemble_integer (const0_rtx, GET_MODE_SIZE (Pmode), |
939 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 SS |
940 | } |
941 | } | |
942 | } | |
943 | ||
944 | int | |
945 | machopic_operand_p (op) | |
946 | rtx op; | |
947 | { | |
948 | if (MACHOPIC_JUST_INDIRECT) | |
949 | { | |
950 | while (GET_CODE (op) == CONST) | |
951 | op = XEXP (op, 0); | |
952 | ||
953 | if (GET_CODE (op) == SYMBOL_REF) | |
954 | return machopic_name_defined_p (XSTR (op, 0)); | |
955 | else | |
956 | return 0; | |
957 | } | |
958 | ||
959 | while (GET_CODE (op) == CONST) | |
960 | op = XEXP (op, 0); | |
961 | ||
962 | if (GET_CODE (op) == MINUS | |
963 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
964 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
965 | && machopic_name_defined_p (XSTR (XEXP (op, 0), 0)) | |
966 | && machopic_name_defined_p (XSTR (XEXP (op, 1), 0))) | |
967 | return 1; | |
968 | ||
ee890fe2 SS |
969 | return 0; |
970 | } | |
df56a27f SS |
971 | |
972 | /* This function records whether a given name corresponds to a defined | |
973 | or undefined function or variable, for machopic_classify_ident to | |
974 | use later. */ | |
975 | ||
976 | void | |
b2003250 | 977 | darwin_encode_section_info (decl, first) |
df56a27f | 978 | tree decl; |
b2003250 | 979 | int first ATTRIBUTE_UNUSED; |
df56a27f SS |
980 | { |
981 | char code = '\0'; | |
982 | int defined = 0; | |
353e51f8 | 983 | rtx sym_ref; |
c0cbc013 DJ |
984 | const char *orig_str; |
985 | char *new_str; | |
353e51f8 | 986 | size_t len, new_len; |
df56a27f SS |
987 | |
988 | if ((TREE_CODE (decl) == FUNCTION_DECL | |
989 | || TREE_CODE (decl) == VAR_DECL) | |
70bdc2ff | 990 | && !DECL_EXTERNAL (decl) |
df56a27f SS |
991 | && ((TREE_STATIC (decl) |
992 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
abe72dd8 SS |
993 | || (DECL_INITIAL (decl) |
994 | && DECL_INITIAL (decl) != error_mark_node))) | |
df56a27f SS |
995 | defined = 1; |
996 | ||
997 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
998 | code = (defined ? 'T' : 't'); | |
999 | else if (TREE_CODE (decl) == VAR_DECL) | |
1000 | code = (defined ? 'D' : 'd'); | |
1001 | ||
353e51f8 SS |
1002 | if (code == '\0') |
1003 | return; | |
df56a27f | 1004 | |
353e51f8 SS |
1005 | sym_ref = XEXP (DECL_RTL (decl), 0); |
1006 | orig_str = XSTR (sym_ref, 0); | |
1007 | len = strlen (orig_str) + 1; | |
df56a27f | 1008 | |
353e51f8 SS |
1009 | if (orig_str[0] == '!') |
1010 | { | |
1011 | /* Already encoded; see if we need to change it. */ | |
1012 | if (code == orig_str[1]) | |
1013 | return; | |
1014 | /* Yes, tweak a copy of the name and put it in a new string. */ | |
1015 | new_str = alloca (len); | |
1016 | memcpy (new_str, orig_str, len); | |
1017 | new_str[1] = code; | |
1018 | XSTR (sym_ref, 0) = ggc_alloc_string (new_str, len); | |
353e51f8 SS |
1019 | } |
1020 | else | |
1021 | { | |
1022 | /* Add the encoding. */ | |
1023 | new_len = len + 4; | |
1024 | new_str = alloca (new_len); | |
1025 | new_str[0] = '!'; | |
1026 | new_str[1] = code; | |
1027 | new_str[2] = '_'; | |
1028 | new_str[3] = '_'; | |
1029 | memcpy (new_str + 4, orig_str, len); | |
1030 | XSTR (sym_ref, 0) = ggc_alloc_string (new_str, new_len); | |
df56a27f | 1031 | } |
4e08ba6c SS |
1032 | /* The non-lazy pointer list may have captured references to the |
1033 | old encoded name, change them. */ | |
b7fb9feb TC |
1034 | if (TREE_CODE (decl) == VAR_DECL) |
1035 | update_non_lazy_ptrs (XSTR (sym_ref, 0)); | |
1036 | else | |
1037 | update_stubs (XSTR (sym_ref, 0)); | |
df56a27f SS |
1038 | } |
1039 | ||
772c5265 RH |
1040 | /* Undo the effects of the above. */ |
1041 | ||
1042 | const char * | |
1043 | darwin_strip_name_encoding (str) | |
1044 | const char *str; | |
1045 | { | |
1046 | return str[0] == '!' ? str + 4 : str; | |
1047 | } | |
1048 | ||
df56a27f SS |
1049 | /* Scan the list of non-lazy pointers and update any recorded names whose |
1050 | stripped name matches the argument. */ | |
1051 | ||
1052 | static void | |
1053 | update_non_lazy_ptrs (name) | |
1054 | const char *name; | |
1055 | { | |
91dc3130 | 1056 | const char *name1, *name2; |
df56a27f SS |
1057 | tree temp; |
1058 | ||
772c5265 | 1059 | name1 = darwin_strip_name_encoding (name); |
df56a27f SS |
1060 | |
1061 | for (temp = machopic_non_lazy_pointers; | |
1062 | temp != NULL_TREE; | |
1063 | temp = TREE_CHAIN (temp)) | |
1064 | { | |
7ae8cf75 | 1065 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
df56a27f SS |
1066 | |
1067 | if (*sym_name == '!') | |
1068 | { | |
772c5265 | 1069 | name2 = darwin_strip_name_encoding (sym_name); |
df56a27f SS |
1070 | if (strcmp (name1, name2) == 0) |
1071 | { | |
d24652ee GK |
1072 | /* FIXME: This breaks the identifier hash table. */ |
1073 | IDENTIFIER_NODE_CHECK (TREE_VALUE (temp))->identifier.id.str | |
1074 | = (unsigned char *) name; | |
df56a27f SS |
1075 | break; |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | } | |
4e08ba6c | 1080 | |
b7fb9feb TC |
1081 | /* Function NAME is being defined, and its label has just been output. |
1082 | If there's already a reference to a stub for this function, we can | |
991b6592 | 1083 | just emit the stub label now and we don't bother emitting the stub later. */ |
b7fb9feb TC |
1084 | |
1085 | void | |
1086 | machopic_output_possible_stub_label (file, name) | |
1087 | FILE *file; | |
1088 | const char *name; | |
1089 | { | |
1090 | tree temp; | |
1091 | ||
1092 | ||
1093 | /* Ensure we're looking at a section-encoded name. */ | |
1094 | if (name[0] != '!' || (name[1] != 't' && name[1] != 'T')) | |
1095 | return; | |
1096 | ||
1097 | for (temp = machopic_stubs; | |
1098 | temp != NULL_TREE; | |
1099 | temp = TREE_CHAIN (temp)) | |
1100 | { | |
1101 | const char *sym_name; | |
1102 | ||
1103 | sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); | |
1104 | if (sym_name[0] == '!' && sym_name[1] == 'T' | |
1105 | && ! strcmp (name+2, sym_name+2)) | |
1106 | { | |
1107 | ASM_OUTPUT_LABEL (file, IDENTIFIER_POINTER (TREE_PURPOSE (temp))); | |
61d951df TC |
1108 | /* Avoid generating a stub for this. */ |
1109 | TREE_USED (temp) = 0; | |
b7fb9feb TC |
1110 | break; |
1111 | } | |
1112 | } | |
1113 | } | |
4e08ba6c SS |
1114 | |
1115 | /* Scan the list of stubs and update any recorded names whose | |
1116 | stripped name matches the argument. */ | |
1117 | ||
1118 | static void | |
1119 | update_stubs (name) | |
1120 | const char *name; | |
1121 | { | |
91dc3130 | 1122 | const char *name1, *name2; |
4e08ba6c SS |
1123 | tree temp; |
1124 | ||
772c5265 | 1125 | name1 = darwin_strip_name_encoding (name); |
4e08ba6c SS |
1126 | |
1127 | for (temp = machopic_stubs; | |
1128 | temp != NULL_TREE; | |
1129 | temp = TREE_CHAIN (temp)) | |
1130 | { | |
7ae8cf75 | 1131 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
4e08ba6c SS |
1132 | |
1133 | if (*sym_name == '!') | |
1134 | { | |
772c5265 | 1135 | name2 = darwin_strip_name_encoding (sym_name); |
4e08ba6c SS |
1136 | if (strcmp (name1, name2) == 0) |
1137 | { | |
d24652ee GK |
1138 | /* FIXME: This breaks the identifier hash table. */ |
1139 | IDENTIFIER_NODE_CHECK (TREE_VALUE (temp))->identifier.id.str | |
1140 | = (unsigned char *) name; | |
4e08ba6c SS |
1141 | break; |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | } | |
2cc07db4 | 1146 | |
ae46c4e0 RH |
1147 | void |
1148 | machopic_select_section (exp, reloc, align) | |
1149 | tree exp; | |
1150 | int reloc; | |
1151 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
1152 | { | |
1153 | if (TREE_CODE (exp) == STRING_CST) | |
1154 | { | |
1155 | if (flag_writable_strings) | |
1156 | data_section (); | |
d24652ee | 1157 | else if ((size_t) TREE_STRING_LENGTH (exp) != |
ae46c4e0 RH |
1158 | strlen (TREE_STRING_POINTER (exp)) + 1) |
1159 | readonly_data_section (); | |
1160 | else | |
1161 | cstring_section (); | |
1162 | } | |
1163 | else if (TREE_CODE (exp) == INTEGER_CST | |
1164 | || TREE_CODE (exp) == REAL_CST) | |
1165 | { | |
1166 | tree size = TYPE_SIZE (TREE_TYPE (exp)); | |
1167 | ||
1168 | if (TREE_CODE (size) == INTEGER_CST && | |
1169 | TREE_INT_CST_LOW (size) == 4 && | |
1170 | TREE_INT_CST_HIGH (size) == 0) | |
1171 | literal4_section (); | |
1172 | else if (TREE_CODE (size) == INTEGER_CST && | |
1173 | TREE_INT_CST_LOW (size) == 8 && | |
1174 | TREE_INT_CST_HIGH (size) == 0) | |
1175 | literal8_section (); | |
1176 | else | |
1177 | readonly_data_section (); | |
1178 | } | |
1179 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1180 | && TREE_TYPE (exp) | |
1181 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1182 | && TYPE_NAME (TREE_TYPE (exp))) | |
1183 | { | |
1184 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1185 | if (TREE_CODE (name) == TYPE_DECL) | |
1186 | name = DECL_NAME (name); | |
1187 | if (!strcmp (IDENTIFIER_POINTER (name), "NSConstantString")) | |
1188 | objc_constant_string_object_section (); | |
1189 | else if (!strcmp (IDENTIFIER_POINTER (name), "NXConstantString")) | |
1190 | objc_string_object_section (); | |
1191 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) | |
1192 | { | |
ab82a49f AP |
1193 | |
1194 | if (TREE_SIDE_EFFECTS (exp) || (MACHOPIC_INDIRECT && reloc)) | |
ae46c4e0 RH |
1195 | const_data_section (); |
1196 | else | |
1197 | readonly_data_section (); | |
1198 | } | |
1199 | else | |
1200 | data_section (); | |
1201 | } | |
1202 | else if (TREE_CODE (exp) == VAR_DECL && | |
1203 | DECL_NAME (exp) && | |
1204 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1205 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1206 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1207 | { | |
1208 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1209 | ||
1210 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
1211 | objc_cls_meth_section (); | |
1212 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) | |
1213 | objc_inst_meth_section (); | |
1214 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) | |
1215 | objc_cat_cls_meth_section (); | |
1216 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) | |
1217 | objc_cat_inst_meth_section (); | |
1218 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) | |
1219 | objc_class_vars_section (); | |
1220 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) | |
1221 | objc_instance_vars_section (); | |
1222 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) | |
1223 | objc_cat_cls_meth_section (); | |
1224 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) | |
1225 | objc_class_names_section (); | |
1226 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) | |
1227 | objc_meth_var_names_section (); | |
1228 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) | |
1229 | objc_meth_var_types_section (); | |
1230 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) | |
1231 | objc_cls_refs_section (); | |
1232 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) | |
1233 | objc_class_section (); | |
1234 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) | |
1235 | objc_meta_class_section (); | |
1236 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) | |
1237 | objc_category_section (); | |
1238 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) | |
1239 | objc_selector_refs_section (); | |
1240 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) | |
1241 | objc_selector_fixup_section (); | |
1242 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) | |
1243 | objc_symbols_section (); | |
1244 | else if (!strncmp (name, "_OBJC_MODULES", 13)) | |
1245 | objc_module_info_section (); | |
1246 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) | |
1247 | objc_cat_inst_meth_section (); | |
1248 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) | |
1249 | objc_cat_cls_meth_section (); | |
1250 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) | |
1251 | objc_cat_cls_meth_section (); | |
1252 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) | |
1253 | objc_protocol_section (); | |
1254 | else if ((TREE_READONLY (exp) || TREE_CONSTANT (exp)) | |
1255 | && !TREE_SIDE_EFFECTS (exp)) | |
1256 | { | |
ab82a49f AP |
1257 | |
1258 | if (MACHOPIC_INDIRECT && reloc) | |
ae46c4e0 RH |
1259 | const_data_section (); |
1260 | else | |
1261 | readonly_data_section (); | |
1262 | } | |
1263 | else | |
1264 | data_section (); | |
1265 | } | |
1266 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) | |
1267 | { | |
ab82a49f AP |
1268 | |
1269 | if (TREE_SIDE_EFFECTS (exp) || (MACHOPIC_INDIRECT && reloc)) | |
ae46c4e0 RH |
1270 | const_data_section (); |
1271 | else | |
1272 | readonly_data_section (); | |
1273 | } | |
1274 | else | |
1275 | data_section (); | |
1276 | } | |
1277 | ||
b64a1b53 | 1278 | /* This can be called with address expressions as "rtx". |
991b6592 | 1279 | They must go in "const". */ |
b64a1b53 RH |
1280 | |
1281 | void | |
1282 | machopic_select_rtx_section (mode, x, align) | |
1283 | enum machine_mode mode; | |
1284 | rtx x; | |
1285 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED; | |
1286 | { | |
1287 | if (GET_MODE_SIZE (mode) == 8) | |
1288 | literal8_section (); | |
1289 | else if (GET_MODE_SIZE (mode) == 4 | |
1290 | && (GET_CODE (x) == CONST_INT | |
1291 | || GET_CODE (x) == CONST_DOUBLE)) | |
1292 | literal4_section (); | |
1293 | else | |
1294 | const_section (); | |
1295 | } | |
1296 | ||
2cc07db4 RH |
1297 | void |
1298 | machopic_asm_out_constructor (symbol, priority) | |
1299 | rtx symbol; | |
1300 | int priority ATTRIBUTE_UNUSED; | |
1301 | { | |
ab82a49f AP |
1302 | |
1303 | if (MACHOPIC_INDIRECT) | |
2cc07db4 RH |
1304 | mod_init_section (); |
1305 | else | |
1306 | constructor_section (); | |
c8af3574 RH |
1307 | assemble_align (POINTER_SIZE); |
1308 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1309 | |
ab82a49f AP |
1310 | |
1311 | if (! MACHOPIC_INDIRECT) | |
2cc07db4 RH |
1312 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1313 | } | |
1314 | ||
1315 | void | |
1316 | machopic_asm_out_destructor (symbol, priority) | |
1317 | rtx symbol; | |
1318 | int priority ATTRIBUTE_UNUSED; | |
1319 | { | |
ab82a49f AP |
1320 | |
1321 | if (MACHOPIC_INDIRECT) | |
2cc07db4 RH |
1322 | mod_term_section (); |
1323 | else | |
1324 | destructor_section (); | |
c8af3574 RH |
1325 | assemble_align (POINTER_SIZE); |
1326 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1327 | |
ab82a49f | 1328 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1329 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1330 | } | |
e2500fed | 1331 | |
5eb99654 KG |
1332 | void |
1333 | darwin_globalize_label (stream, name) | |
1334 | FILE *stream; | |
1335 | const char *name; | |
1336 | { | |
1337 | if (!!strncmp (name, "_OBJC_", 6)) | |
1338 | default_globalize_label (stream, name); | |
1339 | } | |
1340 | ||
7606e68f SS |
1341 | /* Output a difference of two labels that will be an assembly time |
1342 | constant if the two labels are local. (.long lab1-lab2 will be | |
1343 | very different if lab1 is at the boundary between two sections; it | |
1344 | will be relocated according to the second section, not the first, | |
1345 | so one ends up with a difference between labels in different | |
1346 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1347 | ||
1348 | static int darwin_dwarf_label_counter; | |
1349 | ||
1350 | void | |
1351 | darwin_asm_output_dwarf_delta (file, size, lab1, lab2) | |
1352 | FILE *file; | |
1353 | int size ATTRIBUTE_UNUSED; | |
1354 | const char *lab1, *lab2; | |
1355 | { | |
1356 | const char *p = lab1 + (lab1[0] == '*'); | |
1357 | int islocaldiff = (p[0] == 'L'); | |
1358 | ||
1359 | if (islocaldiff) | |
1360 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1361 | else | |
1362 | fprintf (file, "\t%s\t", ".long"); | |
1363 | assemble_name (file, lab1); | |
1364 | fprintf (file, "-"); | |
1365 | assemble_name (file, lab2); | |
1366 | if (islocaldiff) | |
1367 | fprintf (file, "\n\t.long L$set$%d", darwin_dwarf_label_counter++); | |
1368 | } | |
1369 | ||
e2500fed GK |
1370 | #include "gt-darwin.h" |
1371 |