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80d725d7 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
093936a9 | 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004 |
80d725d7 | 3 | Free Software Foundation, Inc. |
4 | Contributed by Apple Computer Inc. | |
5 | ||
187b36cf | 6 | This file is part of GCC. |
80d725d7 | 7 | |
187b36cf | 8 | GCC is free software; you can redistribute it and/or modify |
80d725d7 | 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 | ||
187b36cf | 13 | GCC is distributed in the hope that it will be useful, |
80d725d7 | 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 | |
187b36cf | 19 | along with GCC; see the file COPYING. If not, write to |
80d725d7 | 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" | |
805e22b2 | 25 | #include "coretypes.h" |
26 | #include "tm.h" | |
80d725d7 | 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" | |
80d725d7 | 40 | #include "function.h" |
41 | #include "ggc.h" | |
d19bd1f0 | 42 | #include "langhooks.h" |
79e2a0ca | 43 | #include "tm_p.h" |
2c5b6111 | 44 | #include "errors.h" |
80d725d7 | 45 | |
b40da9a7 | 46 | static int machopic_data_defined_p (const char *); |
47 | static void update_non_lazy_ptrs (const char *); | |
48 | static void update_stubs (const char *); | |
37ec5024 | 49 | static const char *machopic_non_lazy_ptr_name (const char*); |
80d725d7 | 50 | |
80d725d7 | 51 | int |
b40da9a7 | 52 | name_needs_quotes (const char *name) |
80d725d7 | 53 | { |
54 | int c; | |
55 | while ((c = *name++) != '\0') | |
37ec5024 | 56 | if (! ISIDNUM (c) && c != '.' && c != '$') |
80d725d7 | 57 | return 1; |
58 | return 0; | |
59 | } | |
60 | ||
b40da9a7 | 61 | /* |
80d725d7 | 62 | * flag_pic = 1 ... generate only indirections |
63 | * flag_pic = 2 ... generate indirections and pure code | |
64 | */ | |
65 | ||
66 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic | |
67 | reference, which will not be changed. */ | |
68 | ||
1f3233d1 | 69 | static GTY(()) tree machopic_defined_list; |
80d725d7 | 70 | |
71 | enum machopic_addr_class | |
b40da9a7 | 72 | machopic_classify_ident (tree ident) |
80d725d7 | 73 | { |
74 | const char *name = IDENTIFIER_POINTER (ident); | |
75 | int lprefix = (((name[0] == '*' || name[0] == '&') | |
76 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
b40da9a7 | 77 | || ( name[0] == '_' |
78 | && name[1] == 'O' | |
79 | && name[2] == 'B' | |
80d725d7 | 80 | && name[3] == 'J' |
81 | && name[4] == 'C' | |
82 | && name[5] == '_')); | |
8dfaa51b | 83 | tree temp; |
b40da9a7 | 84 | |
1d60d981 | 85 | /* The PIC base symbol is always defined. */ |
b186bdc9 | 86 | if (! strcmp (name, "<pic base>")) |
87 | return MACHOPIC_DEFINED_DATA; | |
80d725d7 | 88 | |
8dfaa51b | 89 | if (name[0] != '!') |
80d725d7 | 90 | { |
8dfaa51b | 91 | /* Here if no special encoding to be found. */ |
80d725d7 | 92 | if (lprefix) |
93 | { | |
94 | const char *name = IDENTIFIER_POINTER (ident); | |
95 | int len = strlen (name); | |
96 | ||
97 | if ((len > 5 && !strcmp (name + len - 5, "$stub")) | |
98 | || (len > 6 && !strcmp (name + len - 6, "$stub\""))) | |
99 | return MACHOPIC_DEFINED_FUNCTION; | |
100 | return MACHOPIC_DEFINED_DATA; | |
101 | } | |
102 | ||
103 | for (temp = machopic_defined_list; | |
104 | temp != NULL_TREE; | |
105 | temp = TREE_CHAIN (temp)) | |
106 | { | |
107 | if (ident == TREE_VALUE (temp)) | |
108 | return MACHOPIC_DEFINED_DATA; | |
109 | } | |
110 | ||
111 | if (TREE_ASM_WRITTEN (ident)) | |
112 | return MACHOPIC_DEFINED_DATA; | |
113 | ||
114 | return MACHOPIC_UNDEFINED; | |
115 | } | |
116 | ||
8dfaa51b | 117 | else if (name[1] == 'D') |
118 | return MACHOPIC_DEFINED_DATA; | |
80d725d7 | 119 | |
8dfaa51b | 120 | else if (name[1] == 'T') |
121 | return MACHOPIC_DEFINED_FUNCTION; | |
80d725d7 | 122 | |
8e7f7ecc | 123 | /* It is possible that someone is holding a "stale" name, which has |
124 | since been defined. See if there is a "defined" name (i.e, | |
125 | different from NAME only in having a '!D_' or a '!T_' instead of | |
126 | a '!d_' or '!t_' prefix) in the identifier hash tables. If so, say | |
127 | that this identifier is defined. */ | |
128 | else if (name[1] == 'd' || name[1] == 't') | |
129 | { | |
130 | char *new_name; | |
131 | new_name = (char *)alloca (strlen (name) + 1); | |
132 | strcpy (new_name, name); | |
133 | new_name[1] = (name[1] == 'd') ? 'D' : 'T'; | |
134 | if (maybe_get_identifier (new_name) != NULL) | |
135 | return (name[1] == 'd') ? MACHOPIC_DEFINED_DATA | |
136 | : MACHOPIC_DEFINED_FUNCTION; | |
137 | } | |
138 | ||
80d725d7 | 139 | for (temp = machopic_defined_list; temp != NULL_TREE; temp = TREE_CHAIN (temp)) |
140 | { | |
141 | if (ident == TREE_VALUE (temp)) | |
142 | { | |
8dfaa51b | 143 | if (name[1] == 'T') |
80d725d7 | 144 | return MACHOPIC_DEFINED_FUNCTION; |
145 | else | |
146 | return MACHOPIC_DEFINED_DATA; | |
147 | } | |
148 | } | |
b40da9a7 | 149 | |
8dfaa51b | 150 | if (name[1] == 't' || name[1] == 'T') |
80d725d7 | 151 | { |
152 | if (lprefix) | |
153 | return MACHOPIC_DEFINED_FUNCTION; | |
154 | else | |
155 | return MACHOPIC_UNDEFINED_FUNCTION; | |
156 | } | |
157 | else | |
158 | { | |
159 | if (lprefix) | |
160 | return MACHOPIC_DEFINED_DATA; | |
161 | else | |
162 | return MACHOPIC_UNDEFINED_DATA; | |
163 | } | |
164 | } | |
165 | ||
b40da9a7 | 166 | |
80d725d7 | 167 | enum machopic_addr_class |
b40da9a7 | 168 | machopic_classify_name (const char *name) |
80d725d7 | 169 | { |
170 | return machopic_classify_ident (get_identifier (name)); | |
171 | } | |
172 | ||
173 | int | |
b40da9a7 | 174 | machopic_ident_defined_p (tree ident) |
80d725d7 | 175 | { |
176 | switch (machopic_classify_ident (ident)) | |
177 | { | |
178 | case MACHOPIC_UNDEFINED: | |
179 | case MACHOPIC_UNDEFINED_DATA: | |
180 | case MACHOPIC_UNDEFINED_FUNCTION: | |
181 | return 0; | |
182 | default: | |
183 | return 1; | |
184 | } | |
185 | } | |
186 | ||
187 | static int | |
b40da9a7 | 188 | machopic_data_defined_p (const char *name) |
80d725d7 | 189 | { |
190 | switch (machopic_classify_ident (get_identifier (name))) | |
191 | { | |
192 | case MACHOPIC_DEFINED_DATA: | |
193 | return 1; | |
194 | default: | |
195 | return 0; | |
196 | } | |
197 | } | |
198 | ||
199 | int | |
b40da9a7 | 200 | machopic_name_defined_p (const char *name) |
80d725d7 | 201 | { |
202 | return machopic_ident_defined_p (get_identifier (name)); | |
203 | } | |
204 | ||
205 | void | |
b40da9a7 | 206 | machopic_define_ident (tree ident) |
80d725d7 | 207 | { |
208 | if (!machopic_ident_defined_p (ident)) | |
b40da9a7 | 209 | machopic_defined_list = |
80d725d7 | 210 | tree_cons (NULL_TREE, ident, machopic_defined_list); |
211 | } | |
212 | ||
213 | void | |
b40da9a7 | 214 | machopic_define_name (const char *name) |
80d725d7 | 215 | { |
216 | machopic_define_ident (get_identifier (name)); | |
217 | } | |
218 | ||
3a32429b | 219 | static GTY(()) char * function_base; |
80d725d7 | 220 | |
a7260dec | 221 | const char * |
b40da9a7 | 222 | machopic_function_base_name (void) |
80d725d7 | 223 | { |
8f74ae7b | 224 | /* if dynamic-no-pic is on, we should not get here */ |
225 | if (MACHO_DYNAMIC_NO_PIC_P) | |
226 | abort (); | |
80d725d7 | 227 | |
b186bdc9 | 228 | if (function_base == NULL) |
b40da9a7 | 229 | function_base = |
b186bdc9 | 230 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
231 | ||
232 | current_function_uses_pic_offset_table = 1; | |
233 | ||
234 | return function_base; | |
235 | } | |
236 | ||
237 | static GTY(()) const char * function_base_func_name; | |
238 | static GTY(()) int current_pic_label_num; | |
239 | ||
240 | void | |
241 | machopic_output_function_base_name (FILE *file) | |
242 | { | |
243 | const char *current_name; | |
244 | ||
1d60d981 | 245 | /* If dynamic-no-pic is on, we should not get here. */ |
b186bdc9 | 246 | if (MACHO_DYNAMIC_NO_PIC_P) |
247 | abort (); | |
b40da9a7 | 248 | current_name = |
b186bdc9 | 249 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
3a32429b | 250 | if (function_base_func_name != current_name) |
80d725d7 | 251 | { |
80d725d7 | 252 | ++current_pic_label_num; |
3a32429b | 253 | function_base_func_name = current_name; |
80d725d7 | 254 | } |
b186bdc9 | 255 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
80d725d7 | 256 | } |
257 | ||
1f3233d1 | 258 | static GTY(()) tree machopic_non_lazy_pointers; |
80d725d7 | 259 | |
260 | /* Return a non-lazy pointer name corresponding to the given name, | |
261 | either by finding it in our list of pointer names, or by generating | |
262 | a new one. */ | |
263 | ||
37ec5024 | 264 | static const char * |
b40da9a7 | 265 | machopic_non_lazy_ptr_name (const char *name) |
80d725d7 | 266 | { |
5352873f | 267 | const char *temp_name; |
80d725d7 | 268 | tree temp, ident = get_identifier (name); |
b40da9a7 | 269 | |
80d725d7 | 270 | for (temp = machopic_non_lazy_pointers; |
b40da9a7 | 271 | temp != NULL_TREE; |
80d725d7 | 272 | temp = TREE_CHAIN (temp)) |
273 | { | |
274 | if (ident == TREE_VALUE (temp)) | |
275 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
276 | } | |
277 | ||
7b4a38a6 | 278 | name = darwin_strip_name_encoding (name); |
8dfaa51b | 279 | |
280 | /* Try again, but comparing names this time. */ | |
281 | for (temp = machopic_non_lazy_pointers; | |
b40da9a7 | 282 | temp != NULL_TREE; |
8dfaa51b | 283 | temp = TREE_CHAIN (temp)) |
284 | { | |
285 | if (TREE_VALUE (temp)) | |
286 | { | |
287 | temp_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); | |
7b4a38a6 | 288 | temp_name = darwin_strip_name_encoding (temp_name); |
8dfaa51b | 289 | if (strcmp (name, temp_name) == 0) |
290 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
291 | } | |
292 | } | |
293 | ||
80d725d7 | 294 | { |
295 | char *buffer; | |
0b5fb5f8 | 296 | int namelen = strlen (name); |
297 | int bufferlen = 0; | |
80d725d7 | 298 | tree ptr_name; |
299 | ||
0b5fb5f8 | 300 | buffer = alloca (namelen + strlen("$non_lazy_ptr") + 5); |
80d725d7 | 301 | |
302 | strcpy (buffer, "&L"); | |
0b5fb5f8 | 303 | bufferlen = 2; |
80d725d7 | 304 | if (name[0] == '*') |
0b5fb5f8 | 305 | { |
050f75f0 | 306 | memcpy (buffer + bufferlen, name+1, namelen-1+1); |
0b5fb5f8 | 307 | bufferlen += namelen-1; |
308 | } | |
80d725d7 | 309 | else |
310 | { | |
0b5fb5f8 | 311 | buffer[bufferlen] = '_'; |
050f75f0 | 312 | memcpy (buffer + bufferlen +1, name, namelen+1); |
eca8e0db | 313 | bufferlen += namelen +1; |
80d725d7 | 314 | } |
b40da9a7 | 315 | |
050f75f0 | 316 | memcpy (buffer + bufferlen, "$non_lazy_ptr", strlen("$non_lazy_ptr")+1); |
0b5fb5f8 | 317 | bufferlen += strlen("$non_lazy_ptr"); |
80d725d7 | 318 | ptr_name = get_identifier (buffer); |
319 | ||
b40da9a7 | 320 | machopic_non_lazy_pointers |
80d725d7 | 321 | = tree_cons (ptr_name, ident, machopic_non_lazy_pointers); |
322 | ||
323 | TREE_USED (machopic_non_lazy_pointers) = 0; | |
324 | ||
325 | return IDENTIFIER_POINTER (ptr_name); | |
326 | } | |
327 | } | |
328 | ||
1f3233d1 | 329 | static GTY(()) tree machopic_stubs; |
80d725d7 | 330 | |
331 | /* Return the name of the stub corresponding to the given name, | |
332 | generating a new stub name if necessary. */ | |
333 | ||
b40da9a7 | 334 | const char * |
335 | machopic_stub_name (const char *name) | |
80d725d7 | 336 | { |
337 | tree temp, ident = get_identifier (name); | |
d1005824 | 338 | const char *tname; |
339 | ||
80d725d7 | 340 | for (temp = machopic_stubs; |
b40da9a7 | 341 | temp != NULL_TREE; |
80d725d7 | 342 | temp = TREE_CHAIN (temp)) |
343 | { | |
344 | if (ident == TREE_VALUE (temp)) | |
345 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
d1005824 | 346 | tname = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
347 | if (strcmp (name, tname) == 0) | |
348 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
349 | /* A library call name might not be section-encoded yet, so try | |
350 | it against a stripped name. */ | |
351 | if (name[0] != '!' | |
352 | && tname[0] == '!' | |
353 | && strcmp (name, tname + 4) == 0) | |
e479d0de | 354 | return IDENTIFIER_POINTER (TREE_PURPOSE (temp)); |
80d725d7 | 355 | } |
356 | ||
7b4a38a6 | 357 | name = darwin_strip_name_encoding (name); |
8dfaa51b | 358 | |
80d725d7 | 359 | { |
360 | char *buffer; | |
0b5fb5f8 | 361 | int bufferlen = 0; |
362 | int namelen = strlen (name); | |
80d725d7 | 363 | tree ptr_name; |
364 | int needs_quotes = name_needs_quotes (name); | |
365 | ||
0b5fb5f8 | 366 | buffer = alloca (namelen + 20); |
80d725d7 | 367 | |
368 | if (needs_quotes) | |
0b5fb5f8 | 369 | { |
370 | strcpy (buffer, "&\"L"); | |
371 | bufferlen = strlen("&\"L"); | |
372 | } | |
80d725d7 | 373 | else |
0b5fb5f8 | 374 | { |
375 | strcpy (buffer, "&L"); | |
376 | bufferlen = strlen("&L"); | |
377 | } | |
378 | ||
80d725d7 | 379 | if (name[0] == '*') |
380 | { | |
050f75f0 | 381 | memcpy (buffer + bufferlen, name+1, namelen - 1 +1); |
0b5fb5f8 | 382 | bufferlen += namelen - 1; |
80d725d7 | 383 | } |
384 | else | |
385 | { | |
0b5fb5f8 | 386 | buffer[bufferlen] = '_'; |
050f75f0 | 387 | memcpy (buffer + bufferlen +1, name, namelen+1); |
eca8e0db | 388 | bufferlen += namelen +1; |
80d725d7 | 389 | } |
390 | ||
391 | if (needs_quotes) | |
0b5fb5f8 | 392 | { |
050f75f0 | 393 | memcpy (buffer + bufferlen, "$stub\"", strlen("$stub\"")+1); |
0b5fb5f8 | 394 | bufferlen += strlen("$stub\""); |
395 | } | |
80d725d7 | 396 | else |
0b5fb5f8 | 397 | { |
050f75f0 | 398 | memcpy (buffer + bufferlen, "$stub", strlen("$stub")+1); |
0b5fb5f8 | 399 | bufferlen += strlen("$stub"); |
400 | } | |
80d725d7 | 401 | ptr_name = get_identifier (buffer); |
402 | ||
403 | machopic_stubs = tree_cons (ptr_name, ident, machopic_stubs); | |
404 | TREE_USED (machopic_stubs) = 0; | |
405 | ||
406 | return IDENTIFIER_POINTER (ptr_name); | |
407 | } | |
408 | } | |
409 | ||
410 | void | |
b40da9a7 | 411 | machopic_validate_stub_or_non_lazy_ptr (const char *name, int validate_stub) |
80d725d7 | 412 | { |
5352873f | 413 | const char *real_name; |
8dfaa51b | 414 | tree temp, ident = get_identifier (name), id2; |
80d725d7 | 415 | |
416 | for (temp = (validate_stub ? machopic_stubs : machopic_non_lazy_pointers); | |
417 | temp != NULL_TREE; | |
418 | temp = TREE_CHAIN (temp)) | |
419 | if (ident == TREE_PURPOSE (temp)) | |
420 | { | |
421 | /* Mark both the stub or non-lazy pointer as well as the | |
422 | original symbol as being referenced. */ | |
423 | TREE_USED (temp) = 1; | |
424 | if (TREE_CODE (TREE_VALUE (temp)) == IDENTIFIER_NODE) | |
f2cd5f61 | 425 | mark_referenced (TREE_VALUE (temp)); |
7b4a38a6 | 426 | real_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
427 | real_name = darwin_strip_name_encoding (real_name); | |
8dfaa51b | 428 | id2 = maybe_get_identifier (real_name); |
429 | if (id2) | |
f2cd5f61 | 430 | mark_referenced (id2); |
80d725d7 | 431 | } |
432 | } | |
433 | ||
434 | /* Transform ORIG, which may be any data source, to the corresponding | |
435 | source using indirections. */ | |
436 | ||
437 | rtx | |
b40da9a7 | 438 | machopic_indirect_data_reference (rtx orig, rtx reg) |
80d725d7 | 439 | { |
440 | rtx ptr_ref = orig; | |
b40da9a7 | 441 | |
80d725d7 | 442 | if (! MACHOPIC_INDIRECT) |
443 | return orig; | |
444 | ||
445 | if (GET_CODE (orig) == SYMBOL_REF) | |
446 | { | |
447 | const char *name = XSTR (orig, 0); | |
8f74ae7b | 448 | int defined = machopic_data_defined_p (name); |
449 | ||
450 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
451 | { | |
452 | #if defined (TARGET_TOC) | |
b40da9a7 | 453 | emit_insn (gen_macho_high (reg, orig)); |
8f74ae7b | 454 | emit_insn (gen_macho_low (reg, reg, orig)); |
455 | #else | |
456 | /* some other cpu -- writeme! */ | |
457 | abort (); | |
458 | #endif | |
459 | return reg; | |
460 | } | |
461 | else if (defined) | |
80d725d7 | 462 | { |
5352873f | 463 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
37ec5024 | 464 | rtx pic_base = gen_rtx_SYMBOL_REF (Pmode, |
465 | machopic_function_base_name ()); | |
466 | rtx offset = gen_rtx_CONST (Pmode, | |
467 | gen_rtx_MINUS (Pmode, orig, pic_base)); | |
5352873f | 468 | #endif |
80d725d7 | 469 | |
470 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
64668281 | 471 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
80d725d7 | 472 | |
473 | if (reg == NULL) | |
474 | abort (); | |
475 | ||
37ec5024 | 476 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
477 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
478 | gen_rtx_HIGH (Pmode, offset)))); | |
479 | emit_insn (gen_rtx_SET (Pmode, reg, | |
480 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
80d725d7 | 481 | |
482 | orig = reg; | |
483 | #else | |
484 | #if defined (HAVE_lo_sum) | |
485 | if (reg == 0) abort (); | |
486 | ||
37ec5024 | 487 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
488 | gen_rtx_HIGH (Pmode, offset))); | |
489 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
490 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
491 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
80d725d7 | 492 | |
37ec5024 | 493 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
80d725d7 | 494 | #endif |
495 | #endif | |
496 | return orig; | |
497 | } | |
498 | ||
37ec5024 | 499 | ptr_ref = gen_rtx_SYMBOL_REF (Pmode, |
500 | machopic_non_lazy_ptr_name (name)); | |
80d725d7 | 501 | |
f9226418 | 502 | SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); |
503 | ||
80d725d7 | 504 | ptr_ref = gen_rtx_MEM (Pmode, ptr_ref); |
505 | RTX_UNCHANGING_P (ptr_ref) = 1; | |
506 | ||
507 | return ptr_ref; | |
508 | } | |
509 | else if (GET_CODE (orig) == CONST) | |
510 | { | |
511 | rtx base, result; | |
512 | ||
513 | /* legitimize both operands of the PLUS */ | |
514 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
515 | { | |
516 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
517 | reg); | |
518 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
519 | (base == reg ? 0 : reg)); | |
520 | } | |
b40da9a7 | 521 | else |
80d725d7 | 522 | return orig; |
523 | ||
524 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
b244d4c7 | 525 | result = plus_constant (base, INTVAL (orig)); |
80d725d7 | 526 | else |
37ec5024 | 527 | result = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 528 | |
80d725d7 | 529 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
530 | { | |
531 | if (reg) | |
532 | { | |
533 | emit_move_insn (reg, result); | |
534 | result = reg; | |
535 | } | |
536 | else | |
537 | { | |
538 | result = force_reg (GET_MODE (result), result); | |
539 | } | |
540 | } | |
541 | ||
542 | return result; | |
543 | ||
544 | } | |
545 | else if (GET_CODE (orig) == MEM) | |
546 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
547 | /* When the target is i386, this code prevents crashes due to the | |
548 | compiler's ignorance on how to move the PIC base register to | |
549 | other registers. (The reload phase sometimes introduces such | |
550 | insns.) */ | |
551 | else if (GET_CODE (orig) == PLUS | |
552 | && GET_CODE (XEXP (orig, 0)) == REG | |
553 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
554 | #ifdef I386 | |
555 | /* Prevent the same register from being erroneously used | |
556 | as both the base and index registers. */ | |
557 | && GET_CODE (XEXP (orig, 1)) == CONST | |
558 | #endif | |
559 | && reg) | |
560 | { | |
561 | emit_move_insn (reg, XEXP (orig, 0)); | |
562 | XEXP (ptr_ref, 0) = reg; | |
563 | } | |
564 | return ptr_ref; | |
565 | } | |
566 | ||
80d725d7 | 567 | /* Transform TARGET (a MEM), which is a function call target, to the |
568 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
569 | ||
570 | rtx | |
b40da9a7 | 571 | machopic_indirect_call_target (rtx target) |
80d725d7 | 572 | { |
573 | if (GET_CODE (target) != MEM) | |
574 | return target; | |
575 | ||
576 | if (MACHOPIC_INDIRECT && GET_CODE (XEXP (target, 0)) == SYMBOL_REF) | |
b40da9a7 | 577 | { |
80d725d7 | 578 | enum machine_mode mode = GET_MODE (XEXP (target, 0)); |
579 | const char *name = XSTR (XEXP (target, 0), 0); | |
580 | ||
8e7f7ecc | 581 | /* If the name is already defined, we need do nothing. */ |
582 | if (name[0] == '!' && name[1] == 'T') | |
583 | return target; | |
584 | ||
585 | if (!machopic_name_defined_p (name)) | |
80d725d7 | 586 | { |
587 | const char *stub_name = machopic_stub_name (name); | |
0c361cc4 | 588 | tree decl = SYMBOL_REF_DECL (XEXP (target, 0)); |
80d725d7 | 589 | |
37ec5024 | 590 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); |
0c361cc4 | 591 | SYMBOL_REF_DECL (XEXP (target, 0)) = decl; |
80d725d7 | 592 | RTX_UNCHANGING_P (target) = 1; |
b40da9a7 | 593 | } |
80d725d7 | 594 | } |
595 | ||
596 | return target; | |
597 | } | |
598 | ||
599 | rtx | |
b40da9a7 | 600 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
80d725d7 | 601 | { |
602 | rtx pic_ref = orig; | |
603 | ||
8f74ae7b | 604 | if (! MACHOPIC_INDIRECT) |
80d725d7 | 605 | return orig; |
606 | ||
607 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
608 | if (GET_CODE (orig) == LABEL_REF | |
609 | || (GET_CODE (orig) == SYMBOL_REF | |
610 | )) | |
611 | { | |
612 | /* addr(foo) = &func+(foo-func) */ | |
613 | rtx pic_base; | |
614 | ||
615 | orig = machopic_indirect_data_reference (orig, reg); | |
616 | ||
b40da9a7 | 617 | if (GET_CODE (orig) == PLUS |
80d725d7 | 618 | && GET_CODE (XEXP (orig, 0)) == REG) |
619 | { | |
620 | if (reg == 0) | |
621 | return force_reg (mode, orig); | |
622 | ||
623 | emit_move_insn (reg, orig); | |
624 | return reg; | |
b40da9a7 | 625 | } |
80d725d7 | 626 | |
8f74ae7b | 627 | /* if dynamic-no-pic then use 0 as the pic base */ |
628 | if (MACHO_DYNAMIC_NO_PIC_P) | |
629 | pic_base = CONST0_RTX (Pmode); | |
630 | else | |
37ec5024 | 631 | pic_base = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); |
80d725d7 | 632 | |
633 | if (GET_CODE (orig) == MEM) | |
634 | { | |
635 | if (reg == 0) | |
636 | { | |
637 | if (reload_in_progress) | |
638 | abort (); | |
639 | else | |
640 | reg = gen_reg_rtx (Pmode); | |
641 | } | |
b40da9a7 | 642 | |
80d725d7 | 643 | #ifdef HAVE_lo_sum |
8f74ae7b | 644 | if (MACHO_DYNAMIC_NO_PIC_P |
645 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
646 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
647 | { | |
648 | #if defined (TARGET_TOC) /* ppc */ | |
649 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
650 | rtx asym = XEXP (orig, 0); | |
651 | rtx mem; | |
652 | ||
653 | emit_insn (gen_macho_high (temp_reg, asym)); | |
654 | mem = gen_rtx_MEM (GET_MODE (orig), | |
37ec5024 | 655 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); |
8f74ae7b | 656 | RTX_UNCHANGING_P (mem) = 1; |
37ec5024 | 657 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
8f74ae7b | 658 | #else |
659 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
660 | abort (); | |
661 | #endif | |
662 | pic_ref = reg; | |
663 | } | |
664 | else | |
b40da9a7 | 665 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
80d725d7 | 666 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
667 | { | |
37ec5024 | 668 | rtx offset = gen_rtx_CONST (Pmode, |
669 | gen_rtx_MINUS (Pmode, | |
670 | XEXP (orig, 0), | |
671 | pic_base)); | |
80d725d7 | 672 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
673 | /* Generating a new reg may expose opportunities for | |
674 | common subexpression elimination. */ | |
37ec5024 | 675 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (SImode); |
676 | rtx mem; | |
677 | rtx insn; | |
678 | rtx sum; | |
679 | ||
680 | sum = gen_rtx_HIGH (Pmode, offset); | |
681 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
682 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
80d725d7 | 683 | |
37ec5024 | 684 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
685 | ||
686 | mem = gen_rtx_MEM (GET_MODE (orig), | |
687 | gen_rtx_LO_SUM (Pmode, | |
688 | hi_sum_reg, offset)); | |
689 | RTX_UNCHANGING_P (mem) = 1; | |
690 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); | |
691 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, | |
692 | REG_NOTES (insn)); | |
693 | ||
694 | pic_ref = reg; | |
80d725d7 | 695 | #else |
37ec5024 | 696 | emit_insn (gen_rtx_USE (VOIDmode, |
697 | gen_rtx_REG (Pmode, | |
698 | PIC_OFFSET_TABLE_REGNUM))); | |
699 | ||
700 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
701 | gen_rtx_HIGH (Pmode, | |
702 | gen_rtx_CONST (Pmode, | |
703 | offset)))); | |
704 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
705 | gen_rtx_LO_SUM (Pmode, reg, | |
706 | gen_rtx_CONST (Pmode, offset)))); | |
707 | pic_ref = gen_rtx_PLUS (Pmode, | |
708 | pic_offset_table_rtx, reg); | |
80d725d7 | 709 | #endif |
710 | } | |
711 | else | |
712 | #endif /* HAVE_lo_sum */ | |
713 | { | |
714 | rtx pic = pic_offset_table_rtx; | |
715 | if (GET_CODE (pic) != REG) | |
716 | { | |
717 | emit_move_insn (reg, pic); | |
718 | pic = reg; | |
719 | } | |
720 | #if 0 | |
37ec5024 | 721 | emit_insn (gen_rtx_USE (VOIDmode, |
722 | gen_rtx_REG (Pmode, | |
723 | PIC_OFFSET_TABLE_REGNUM))); | |
80d725d7 | 724 | #endif |
725 | ||
37ec5024 | 726 | pic_ref = gen_rtx_PLUS (Pmode, |
727 | pic, | |
728 | gen_rtx_CONST (Pmode, | |
729 | gen_rtx_MINUS (Pmode, | |
730 | XEXP (orig, 0), | |
731 | pic_base))); | |
80d725d7 | 732 | } |
b40da9a7 | 733 | |
80d725d7 | 734 | #if !defined (TARGET_TOC) |
80d725d7 | 735 | emit_move_insn (reg, pic_ref); |
37ec5024 | 736 | pic_ref = gen_rtx_MEM (GET_MODE (orig), reg); |
80d725d7 | 737 | #endif |
ffd05090 | 738 | RTX_UNCHANGING_P (pic_ref) = 1; |
80d725d7 | 739 | } |
740 | else | |
741 | { | |
742 | ||
743 | #ifdef HAVE_lo_sum | |
b40da9a7 | 744 | if (GET_CODE (orig) == SYMBOL_REF |
80d725d7 | 745 | || GET_CODE (orig) == LABEL_REF) |
746 | { | |
37ec5024 | 747 | rtx offset = gen_rtx_CONST (Pmode, |
748 | gen_rtx_MINUS (Pmode, | |
749 | orig, pic_base)); | |
80d725d7 | 750 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
751 | rtx hi_sum_reg; | |
752 | ||
753 | if (reg == 0) | |
754 | { | |
755 | if (reload_in_progress) | |
756 | abort (); | |
757 | else | |
758 | reg = gen_reg_rtx (SImode); | |
759 | } | |
b40da9a7 | 760 | |
80d725d7 | 761 | hi_sum_reg = reg; |
762 | ||
37ec5024 | 763 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
764 | (MACHO_DYNAMIC_NO_PIC_P) | |
765 | ? gen_rtx_HIGH (Pmode, offset) | |
766 | : gen_rtx_PLUS (Pmode, | |
767 | pic_offset_table_rtx, | |
768 | gen_rtx_HIGH (Pmode, | |
769 | offset)))); | |
770 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
771 | gen_rtx_LO_SUM (Pmode, | |
772 | hi_sum_reg, offset))); | |
80d725d7 | 773 | pic_ref = reg; |
ffd05090 | 774 | RTX_UNCHANGING_P (pic_ref) = 1; |
80d725d7 | 775 | #else |
37ec5024 | 776 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
777 | gen_rtx_HIGH (Pmode, offset))); | |
778 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
779 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
780 | pic_ref = gen_rtx_PLUS (Pmode, | |
781 | pic_offset_table_rtx, reg); | |
ffd05090 | 782 | RTX_UNCHANGING_P (pic_ref) = 1; |
80d725d7 | 783 | #endif |
784 | } | |
785 | else | |
786 | #endif /* HAVE_lo_sum */ | |
787 | { | |
788 | if (GET_CODE (orig) == REG) | |
789 | { | |
790 | return orig; | |
791 | } | |
792 | else | |
793 | { | |
794 | rtx pic = pic_offset_table_rtx; | |
795 | if (GET_CODE (pic) != REG) | |
796 | { | |
797 | emit_move_insn (reg, pic); | |
798 | pic = reg; | |
799 | } | |
800 | #if 0 | |
37ec5024 | 801 | emit_insn (gen_rtx_USE (VOIDmode, |
802 | pic_offset_table_rtx)); | |
80d725d7 | 803 | #endif |
37ec5024 | 804 | pic_ref = gen_rtx_PLUS (Pmode, |
805 | pic, | |
806 | gen_rtx_CONST (Pmode, | |
807 | gen_rtx_MINUS (Pmode, | |
808 | orig, pic_base))); | |
80d725d7 | 809 | } |
810 | } | |
811 | } | |
812 | ||
80d725d7 | 813 | if (GET_CODE (pic_ref) != REG) |
814 | { | |
815 | if (reg != 0) | |
816 | { | |
817 | emit_move_insn (reg, pic_ref); | |
818 | return reg; | |
819 | } | |
820 | else | |
821 | { | |
822 | return force_reg (mode, pic_ref); | |
823 | } | |
824 | } | |
825 | else | |
826 | { | |
827 | return pic_ref; | |
828 | } | |
829 | } | |
830 | ||
831 | else if (GET_CODE (orig) == SYMBOL_REF) | |
832 | return orig; | |
833 | ||
834 | else if (GET_CODE (orig) == PLUS | |
835 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
836 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
837 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
838 | && XEXP (orig, 0) != pic_offset_table_rtx | |
839 | && GET_CODE (XEXP (orig, 1)) != REG) | |
b40da9a7 | 840 | |
80d725d7 | 841 | { |
842 | rtx base; | |
843 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
844 | ||
845 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
846 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
847 | Pmode, (base == reg ? 0 : reg)); | |
848 | if (GET_CODE (orig) == CONST_INT) | |
849 | { | |
b244d4c7 | 850 | pic_ref = plus_constant (base, INTVAL (orig)); |
80d725d7 | 851 | is_complex = 1; |
852 | } | |
853 | else | |
37ec5024 | 854 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
80d725d7 | 855 | |
856 | if (RTX_UNCHANGING_P (base) && RTX_UNCHANGING_P (orig)) | |
857 | RTX_UNCHANGING_P (pic_ref) = 1; | |
858 | ||
859 | if (reg && is_complex) | |
860 | { | |
861 | emit_move_insn (reg, pic_ref); | |
862 | pic_ref = reg; | |
863 | } | |
864 | /* Likewise, should we set special REG_NOTEs here? */ | |
865 | } | |
866 | ||
867 | else if (GET_CODE (orig) == CONST) | |
868 | { | |
869 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
870 | } | |
871 | ||
872 | else if (GET_CODE (orig) == MEM | |
873 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
874 | { | |
875 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
876 | ||
37ec5024 | 877 | addr = gen_rtx_MEM (GET_MODE (orig), addr); |
80d725d7 | 878 | RTX_UNCHANGING_P (addr) = RTX_UNCHANGING_P (orig); |
879 | emit_move_insn (reg, addr); | |
880 | pic_ref = reg; | |
881 | } | |
882 | ||
883 | return pic_ref; | |
884 | } | |
885 | ||
886 | ||
887 | void | |
b40da9a7 | 888 | machopic_finish (FILE *asm_out_file) |
80d725d7 | 889 | { |
890 | tree temp; | |
891 | ||
892 | for (temp = machopic_stubs; | |
893 | temp != NULL_TREE; | |
894 | temp = TREE_CHAIN (temp)) | |
895 | { | |
79d44e49 | 896 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
897 | const char *stub_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
80d725d7 | 898 | char *sym; |
899 | char *stub; | |
80d725d7 | 900 | |
901 | if (! TREE_USED (temp)) | |
902 | continue; | |
903 | ||
7b4a38a6 | 904 | sym_name = darwin_strip_name_encoding (sym_name); |
80d725d7 | 905 | |
906 | sym = alloca (strlen (sym_name) + 2); | |
907 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
908 | strcpy (sym, sym_name + 1); | |
909 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
b40da9a7 | 910 | strcpy (sym, sym_name); |
80d725d7 | 911 | else |
912 | sym[0] = '_', strcpy (sym + 1, sym_name); | |
913 | ||
914 | stub = alloca (strlen (stub_name) + 2); | |
915 | if (stub_name[0] == '*' || stub_name[0] == '&') | |
916 | strcpy (stub, stub_name + 1); | |
917 | else | |
918 | stub[0] = '_', strcpy (stub + 1, stub_name); | |
919 | ||
920 | machopic_output_stub (asm_out_file, sym, stub); | |
921 | } | |
922 | ||
923 | for (temp = machopic_non_lazy_pointers; | |
b40da9a7 | 924 | temp != NULL_TREE; |
80d725d7 | 925 | temp = TREE_CHAIN (temp)) |
926 | { | |
5352873f | 927 | const char *const sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
928 | const char *const lazy_name = IDENTIFIER_POINTER (TREE_PURPOSE (temp)); | |
80d725d7 | 929 | |
930 | if (! TREE_USED (temp)) | |
931 | continue; | |
932 | ||
5d0325e5 | 933 | if (machopic_ident_defined_p (TREE_VALUE (temp))) |
80d725d7 | 934 | { |
935 | data_section (); | |
09d688ff | 936 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); |
80d725d7 | 937 | assemble_label (lazy_name); |
37ec5024 | 938 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), |
09d688ff | 939 | GET_MODE_SIZE (Pmode), |
940 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 941 | } |
942 | else | |
943 | { | |
944 | machopic_nl_symbol_ptr_section (); | |
b40da9a7 | 945 | assemble_name (asm_out_file, lazy_name); |
80d725d7 | 946 | fprintf (asm_out_file, ":\n"); |
947 | ||
948 | fprintf (asm_out_file, "\t.indirect_symbol "); | |
b40da9a7 | 949 | assemble_name (asm_out_file, sym_name); |
80d725d7 | 950 | fprintf (asm_out_file, "\n"); |
951 | ||
09d688ff | 952 | assemble_integer (const0_rtx, GET_MODE_SIZE (Pmode), |
953 | GET_MODE_ALIGNMENT (Pmode), 1); | |
80d725d7 | 954 | } |
955 | } | |
956 | } | |
957 | ||
b40da9a7 | 958 | int |
959 | machopic_operand_p (rtx op) | |
80d725d7 | 960 | { |
961 | if (MACHOPIC_JUST_INDIRECT) | |
962 | { | |
963 | while (GET_CODE (op) == CONST) | |
964 | op = XEXP (op, 0); | |
965 | ||
966 | if (GET_CODE (op) == SYMBOL_REF) | |
967 | return machopic_name_defined_p (XSTR (op, 0)); | |
968 | else | |
969 | return 0; | |
970 | } | |
971 | ||
972 | while (GET_CODE (op) == CONST) | |
973 | op = XEXP (op, 0); | |
974 | ||
975 | if (GET_CODE (op) == MINUS | |
976 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
977 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
978 | && machopic_name_defined_p (XSTR (XEXP (op, 0), 0)) | |
979 | && machopic_name_defined_p (XSTR (XEXP (op, 1), 0))) | |
980 | return 1; | |
981 | ||
80d725d7 | 982 | return 0; |
983 | } | |
8dfaa51b | 984 | |
985 | /* This function records whether a given name corresponds to a defined | |
986 | or undefined function or variable, for machopic_classify_ident to | |
987 | use later. */ | |
988 | ||
989 | void | |
b40da9a7 | 990 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
8dfaa51b | 991 | { |
992 | char code = '\0'; | |
993 | int defined = 0; | |
5a121a91 | 994 | rtx sym_ref; |
4b4b4f4b | 995 | const char *orig_str; |
996 | char *new_str; | |
5a121a91 | 997 | size_t len, new_len; |
8dfaa51b | 998 | |
9af9a32c | 999 | /* Do the standard encoding things first. */ |
1000 | default_encode_section_info (decl, rtl, first); | |
1001 | ||
1002 | /* With the introduction of symbol_ref flags, some of the following | |
1003 | code has become redundant and should be removed at some point. */ | |
1004 | ||
8dfaa51b | 1005 | if ((TREE_CODE (decl) == FUNCTION_DECL |
1006 | || TREE_CODE (decl) == VAR_DECL) | |
47577a57 | 1007 | && !DECL_EXTERNAL (decl) |
2f9fc8ef | 1008 | && (!TREE_PUBLIC (decl) || (!DECL_ONE_ONLY (decl) && !DECL_WEAK (decl))) |
8dfaa51b | 1009 | && ((TREE_STATIC (decl) |
1010 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
2f4fae92 | 1011 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
fd419242 | 1012 | && DECL_INITIAL (decl) != error_mark_node))) |
8dfaa51b | 1013 | defined = 1; |
1014 | ||
1015 | if (TREE_CODE (decl) == FUNCTION_DECL) | |
1016 | code = (defined ? 'T' : 't'); | |
1017 | else if (TREE_CODE (decl) == VAR_DECL) | |
1018 | code = (defined ? 'D' : 'd'); | |
1019 | ||
5a121a91 | 1020 | if (code == '\0') |
1021 | return; | |
8dfaa51b | 1022 | |
2c129d70 | 1023 | sym_ref = XEXP (rtl, 0); |
5a121a91 | 1024 | orig_str = XSTR (sym_ref, 0); |
1025 | len = strlen (orig_str) + 1; | |
8dfaa51b | 1026 | |
5a121a91 | 1027 | if (orig_str[0] == '!') |
1028 | { | |
1029 | /* Already encoded; see if we need to change it. */ | |
1030 | if (code == orig_str[1]) | |
1031 | return; | |
1032 | /* Yes, tweak a copy of the name and put it in a new string. */ | |
1033 | new_str = alloca (len); | |
1034 | memcpy (new_str, orig_str, len); | |
1035 | new_str[1] = code; | |
1036 | XSTR (sym_ref, 0) = ggc_alloc_string (new_str, len); | |
5a121a91 | 1037 | } |
1038 | else | |
1039 | { | |
1040 | /* Add the encoding. */ | |
1041 | new_len = len + 4; | |
1042 | new_str = alloca (new_len); | |
1043 | new_str[0] = '!'; | |
1044 | new_str[1] = code; | |
1045 | new_str[2] = '_'; | |
1046 | new_str[3] = '_'; | |
1047 | memcpy (new_str + 4, orig_str, len); | |
1048 | XSTR (sym_ref, 0) = ggc_alloc_string (new_str, new_len); | |
8dfaa51b | 1049 | } |
e479d0de | 1050 | /* The non-lazy pointer list may have captured references to the |
1051 | old encoded name, change them. */ | |
8e7f7ecc | 1052 | if (TREE_CODE (decl) == VAR_DECL) |
1053 | update_non_lazy_ptrs (XSTR (sym_ref, 0)); | |
1054 | else | |
1055 | update_stubs (XSTR (sym_ref, 0)); | |
8dfaa51b | 1056 | } |
1057 | ||
7b4a38a6 | 1058 | /* Undo the effects of the above. */ |
1059 | ||
1060 | const char * | |
b40da9a7 | 1061 | darwin_strip_name_encoding (const char *str) |
7b4a38a6 | 1062 | { |
1063 | return str[0] == '!' ? str + 4 : str; | |
1064 | } | |
1065 | ||
8dfaa51b | 1066 | /* Scan the list of non-lazy pointers and update any recorded names whose |
1067 | stripped name matches the argument. */ | |
1068 | ||
1069 | static void | |
b40da9a7 | 1070 | update_non_lazy_ptrs (const char *name) |
8dfaa51b | 1071 | { |
79d44e49 | 1072 | const char *name1, *name2; |
8dfaa51b | 1073 | tree temp; |
1074 | ||
7b4a38a6 | 1075 | name1 = darwin_strip_name_encoding (name); |
8dfaa51b | 1076 | |
1077 | for (temp = machopic_non_lazy_pointers; | |
b40da9a7 | 1078 | temp != NULL_TREE; |
8dfaa51b | 1079 | temp = TREE_CHAIN (temp)) |
1080 | { | |
5352873f | 1081 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
8dfaa51b | 1082 | |
1083 | if (*sym_name == '!') | |
1084 | { | |
7b4a38a6 | 1085 | name2 = darwin_strip_name_encoding (sym_name); |
8dfaa51b | 1086 | if (strcmp (name1, name2) == 0) |
1087 | { | |
dbda5ae0 | 1088 | /* FIXME: This breaks the identifier hash table. */ |
b40da9a7 | 1089 | IDENTIFIER_NODE_CHECK (TREE_VALUE (temp))->identifier.id.str |
dbda5ae0 | 1090 | = (unsigned char *) name; |
8dfaa51b | 1091 | break; |
1092 | } | |
1093 | } | |
1094 | } | |
1095 | } | |
e479d0de | 1096 | |
e479d0de | 1097 | /* Scan the list of stubs and update any recorded names whose |
1098 | stripped name matches the argument. */ | |
1099 | ||
1100 | static void | |
b40da9a7 | 1101 | update_stubs (const char *name) |
e479d0de | 1102 | { |
79d44e49 | 1103 | const char *name1, *name2; |
e479d0de | 1104 | tree temp; |
1105 | ||
7b4a38a6 | 1106 | name1 = darwin_strip_name_encoding (name); |
e479d0de | 1107 | |
1108 | for (temp = machopic_stubs; | |
b40da9a7 | 1109 | temp != NULL_TREE; |
e479d0de | 1110 | temp = TREE_CHAIN (temp)) |
1111 | { | |
5352873f | 1112 | const char *sym_name = IDENTIFIER_POINTER (TREE_VALUE (temp)); |
e479d0de | 1113 | |
1114 | if (*sym_name == '!') | |
1115 | { | |
7b4a38a6 | 1116 | name2 = darwin_strip_name_encoding (sym_name); |
e479d0de | 1117 | if (strcmp (name1, name2) == 0) |
1118 | { | |
dbda5ae0 | 1119 | /* FIXME: This breaks the identifier hash table. */ |
b40da9a7 | 1120 | IDENTIFIER_NODE_CHECK (TREE_VALUE (temp))->identifier.id.str |
dbda5ae0 | 1121 | = (unsigned char *) name; |
e479d0de | 1122 | break; |
1123 | } | |
1124 | } | |
1125 | } | |
1126 | } | |
01d15dc5 | 1127 | |
2f9fc8ef | 1128 | void |
1129 | darwin_make_decl_one_only (tree decl) | |
1130 | { | |
1131 | static const char *text_section = "__TEXT,__textcoal_nt,coalesced,no_toc"; | |
1132 | static const char *data_section = "__DATA,__datacoal_nt,coalesced,no_toc"; | |
1133 | ||
1134 | const char *sec = TREE_CODE (decl) == FUNCTION_DECL | |
1135 | ? text_section | |
1136 | : data_section; | |
1137 | TREE_PUBLIC (decl) = 1; | |
1138 | DECL_ONE_ONLY (decl) = 1; | |
1139 | DECL_SECTION_NAME (decl) = build_string (strlen (sec), sec); | |
1140 | } | |
1141 | ||
52470889 | 1142 | void |
b40da9a7 | 1143 | machopic_select_section (tree exp, int reloc, |
1144 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
52470889 | 1145 | { |
7def0f5c | 1146 | void (*base_function)(void); |
b40da9a7 | 1147 | |
7def0f5c | 1148 | if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) |
1149 | base_function = readonly_data_section; | |
1150 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) | |
1151 | base_function = const_data_section; | |
1152 | else | |
1153 | base_function = data_section; | |
b40da9a7 | 1154 | |
7def0f5c | 1155 | if (TREE_CODE (exp) == STRING_CST |
b40da9a7 | 1156 | && ((size_t) TREE_STRING_LENGTH (exp) |
a814bad5 | 1157 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
7def0f5c | 1158 | cstring_section (); |
1159 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) | |
1160 | && flag_merge_constants) | |
52470889 | 1161 | { |
1162 | tree size = TYPE_SIZE (TREE_TYPE (exp)); | |
1163 | ||
1164 | if (TREE_CODE (size) == INTEGER_CST && | |
1165 | TREE_INT_CST_LOW (size) == 4 && | |
1166 | TREE_INT_CST_HIGH (size) == 0) | |
1167 | literal4_section (); | |
1168 | else if (TREE_CODE (size) == INTEGER_CST && | |
1169 | TREE_INT_CST_LOW (size) == 8 && | |
1170 | TREE_INT_CST_HIGH (size) == 0) | |
1171 | literal8_section (); | |
1172 | else | |
7def0f5c | 1173 | base_function (); |
52470889 | 1174 | } |
1175 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1176 | && TREE_TYPE (exp) | |
1177 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1178 | && TYPE_NAME (TREE_TYPE (exp))) | |
1179 | { | |
1180 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1181 | if (TREE_CODE (name) == TYPE_DECL) | |
1182 | name = DECL_NAME (name); | |
1183 | if (!strcmp (IDENTIFIER_POINTER (name), "NSConstantString")) | |
1184 | objc_constant_string_object_section (); | |
1185 | else if (!strcmp (IDENTIFIER_POINTER (name), "NXConstantString")) | |
1186 | objc_string_object_section (); | |
52470889 | 1187 | else |
7def0f5c | 1188 | base_function (); |
52470889 | 1189 | } |
1190 | else if (TREE_CODE (exp) == VAR_DECL && | |
1191 | DECL_NAME (exp) && | |
1192 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1193 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1194 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1195 | { | |
1196 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1197 | ||
1198 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
1199 | objc_cls_meth_section (); | |
1200 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) | |
1201 | objc_inst_meth_section (); | |
1202 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) | |
1203 | objc_cat_cls_meth_section (); | |
1204 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) | |
1205 | objc_cat_inst_meth_section (); | |
1206 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) | |
1207 | objc_class_vars_section (); | |
1208 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) | |
1209 | objc_instance_vars_section (); | |
1210 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) | |
1211 | objc_cat_cls_meth_section (); | |
1212 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) | |
1213 | objc_class_names_section (); | |
1214 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) | |
1215 | objc_meth_var_names_section (); | |
1216 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) | |
1217 | objc_meth_var_types_section (); | |
1218 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) | |
1219 | objc_cls_refs_section (); | |
1220 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) | |
1221 | objc_class_section (); | |
1222 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) | |
1223 | objc_meta_class_section (); | |
1224 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) | |
1225 | objc_category_section (); | |
1226 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) | |
1227 | objc_selector_refs_section (); | |
1228 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) | |
1229 | objc_selector_fixup_section (); | |
1230 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) | |
1231 | objc_symbols_section (); | |
1232 | else if (!strncmp (name, "_OBJC_MODULES", 13)) | |
1233 | objc_module_info_section (); | |
c17b85ea | 1234 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
1235 | objc_image_info_section (); | |
52470889 | 1236 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
1237 | objc_cat_inst_meth_section (); | |
1238 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) | |
1239 | objc_cat_cls_meth_section (); | |
1240 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) | |
1241 | objc_cat_cls_meth_section (); | |
1242 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) | |
1243 | objc_protocol_section (); | |
52470889 | 1244 | else |
7def0f5c | 1245 | base_function (); |
52470889 | 1246 | } |
1247 | else | |
7def0f5c | 1248 | base_function (); |
52470889 | 1249 | } |
1250 | ||
bbfbe351 | 1251 | /* This can be called with address expressions as "rtx". |
9cb8e99f | 1252 | They must go in "const". */ |
bbfbe351 | 1253 | |
1254 | void | |
b40da9a7 | 1255 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1256 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
bbfbe351 | 1257 | { |
1258 | if (GET_MODE_SIZE (mode) == 8) | |
1259 | literal8_section (); | |
1260 | else if (GET_MODE_SIZE (mode) == 4 | |
1261 | && (GET_CODE (x) == CONST_INT | |
1262 | || GET_CODE (x) == CONST_DOUBLE)) | |
1263 | literal4_section (); | |
459f8624 | 1264 | else if (MACHOPIC_INDIRECT |
76dece62 | 1265 | && (GET_CODE (x) == SYMBOL_REF |
1266 | || GET_CODE (x) == CONST | |
1267 | || GET_CODE (x) == LABEL_REF)) | |
1268 | const_data_section (); | |
bbfbe351 | 1269 | else |
1270 | const_section (); | |
1271 | } | |
1272 | ||
01d15dc5 | 1273 | void |
b40da9a7 | 1274 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1275 | { |
8f74ae7b | 1276 | if (MACHOPIC_INDIRECT) |
01d15dc5 | 1277 | mod_init_section (); |
1278 | else | |
1279 | constructor_section (); | |
09d688ff | 1280 | assemble_align (POINTER_SIZE); |
1281 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
01d15dc5 | 1282 | |
8f74ae7b | 1283 | if (! MACHOPIC_INDIRECT) |
01d15dc5 | 1284 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1285 | } | |
1286 | ||
1287 | void | |
b40da9a7 | 1288 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
01d15dc5 | 1289 | { |
8f74ae7b | 1290 | if (MACHOPIC_INDIRECT) |
01d15dc5 | 1291 | mod_term_section (); |
1292 | else | |
1293 | destructor_section (); | |
09d688ff | 1294 | assemble_align (POINTER_SIZE); |
1295 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
01d15dc5 | 1296 | |
8f74ae7b | 1297 | if (! MACHOPIC_INDIRECT) |
01d15dc5 | 1298 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1299 | } | |
1f3233d1 | 1300 | |
67c1e638 | 1301 | void |
b40da9a7 | 1302 | darwin_globalize_label (FILE *stream, const char *name) |
67c1e638 | 1303 | { |
1304 | if (!!strncmp (name, "_OBJC_", 6)) | |
1305 | default_globalize_label (stream, name); | |
1306 | } | |
1307 | ||
2f9fc8ef | 1308 | void |
1309 | darwin_asm_named_section (const char *name, unsigned int flags ATTRIBUTE_UNUSED) | |
1310 | { | |
4f18499c | 1311 | if (flag_reorder_blocks_and_partition) |
1312 | fprintf (asm_out_file, SECTION_FORMAT_STRING, name); | |
1313 | else | |
1314 | fprintf (asm_out_file, ".section %s\n", name); | |
2f9fc8ef | 1315 | } |
1316 | ||
1317 | unsigned int | |
1318 | darwin_section_type_flags (tree decl, const char *name, int reloc) | |
1319 | { | |
1320 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
1321 | ||
1322 | /* Weak or linkonce variables live in a writable section. */ | |
1323 | if (decl != 0 && TREE_CODE (decl) != FUNCTION_DECL | |
1324 | && (DECL_WEAK (decl) || DECL_ONE_ONLY (decl))) | |
1325 | flags |= SECTION_WRITE; | |
1326 | ||
1327 | return flags; | |
1328 | } | |
1329 | ||
1330 | void | |
1331 | darwin_unique_section (tree decl, int reloc ATTRIBUTE_UNUSED) | |
1332 | { | |
1333 | /* Darwin does not use unique sections. However, the target's | |
1334 | unique_section hook is called for linkonce symbols. We need | |
1335 | to set an appropriate section for such symbols. */ | |
1336 | if (DECL_ONE_ONLY (decl) && !DECL_SECTION_NAME (decl)) | |
1337 | darwin_make_decl_one_only (decl); | |
1338 | } | |
1339 | ||
1340 | /* Emit a label for an FDE, making it global and/or weak if appropriate. | |
ef1074f7 | 1341 | The third parameter is nonzero if this is for exception handling. |
1342 | The fourth parameter is nonzero if this is just a placeholder for an | |
2f9fc8ef | 1343 | FDE that we are omitting. */ |
ef1074f7 | 1344 | |
2f9fc8ef | 1345 | void |
ef1074f7 | 1346 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
2f9fc8ef | 1347 | { |
1348 | tree id = DECL_ASSEMBLER_NAME (decl) | |
1349 | ? DECL_ASSEMBLER_NAME (decl) | |
1350 | : DECL_NAME (decl); | |
1351 | ||
1352 | const char *prefix = "_"; | |
1353 | const int prefix_len = 1; | |
1354 | ||
1355 | const char *base = IDENTIFIER_POINTER (id); | |
1356 | unsigned int base_len = IDENTIFIER_LENGTH (id); | |
1357 | ||
1358 | const char *suffix = ".eh"; | |
2f9fc8ef | 1359 | |
1360 | int need_quotes = name_needs_quotes (base); | |
1361 | int quotes_len = need_quotes ? 2 : 0; | |
ef1074f7 | 1362 | char *lab; |
1363 | ||
1364 | if (! for_eh) | |
1365 | suffix = ".eh1"; | |
2f9fc8ef | 1366 | |
ef1074f7 | 1367 | lab = xmalloc (prefix_len + base_len + strlen (suffix) + quotes_len + 1); |
2f9fc8ef | 1368 | lab[0] = '\0'; |
1369 | ||
1370 | if (need_quotes) | |
1371 | strcat(lab, "\""); | |
1372 | strcat(lab, prefix); | |
1373 | strcat(lab, base); | |
1374 | strcat(lab, suffix); | |
1375 | if (need_quotes) | |
1376 | strcat(lab, "\""); | |
1377 | ||
1378 | if (TREE_PUBLIC (decl)) | |
1379 | fprintf (file, "%s %s\n", | |
1380 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN | |
1381 | ? ".globl" | |
1382 | : ".private_extern"), | |
1383 | lab); | |
1384 | ||
1385 | if (DECL_ONE_ONLY (decl) && TREE_PUBLIC (decl)) | |
1386 | fprintf (file, ".weak_definition %s\n", lab); | |
1387 | ||
1388 | if (empty) | |
1389 | fprintf (file, "%s = 0\n", lab); | |
1390 | else | |
1391 | fprintf (file, "%s:\n", lab); | |
1392 | ||
1393 | free (lab); | |
1394 | } | |
1395 | ||
1396 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
ef1074f7 | 1397 | |
2f9fc8ef | 1398 | void |
1399 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1400 | { | |
1401 | const char *str; | |
1402 | const char *nlp_name; | |
1403 | ||
1404 | if (GET_CODE (addr) != SYMBOL_REF) | |
1405 | abort (); | |
1406 | ||
1407 | str = darwin_strip_name_encoding (XSTR (addr, 0)); | |
1408 | nlp_name = machopic_non_lazy_ptr_name (str); | |
1409 | fputs ("\t.long\t", file); | |
1410 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1411 | fputs ("-.", file); | |
1412 | } | |
1413 | ||
2c5b6111 | 1414 | /* Emit an assembler directive to set visibility for a symbol. The |
1415 | only supported visibilities are VISIBILITY_DEFAULT and | |
1416 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1417 | extern". There is no MACH-O equivalent of ELF's | |
1418 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1419 | ||
1420 | void | |
1421 | darwin_assemble_visibility (tree decl, int vis) | |
1422 | { | |
1423 | if (vis == VISIBILITY_DEFAULT) | |
1424 | ; | |
1425 | else if (vis == VISIBILITY_HIDDEN) | |
1426 | { | |
1427 | fputs ("\t.private_extern ", asm_out_file); | |
1428 | assemble_name (asm_out_file, | |
1429 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1430 | fputs ("\n", asm_out_file); | |
1431 | } | |
1432 | else | |
1433 | warning ("internal and protected visibility attributes not supported" | |
1434 | "in this configuration; ignored"); | |
1435 | } | |
1436 | ||
a08b74c8 | 1437 | /* Output a difference of two labels that will be an assembly time |
1438 | constant if the two labels are local. (.long lab1-lab2 will be | |
1439 | very different if lab1 is at the boundary between two sections; it | |
1440 | will be relocated according to the second section, not the first, | |
1441 | so one ends up with a difference between labels in different | |
1442 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1443 | ||
1444 | static int darwin_dwarf_label_counter; | |
1445 | ||
1446 | void | |
b40da9a7 | 1447 | darwin_asm_output_dwarf_delta (FILE *file, int size ATTRIBUTE_UNUSED, |
1448 | const char *lab1, const char *lab2) | |
a08b74c8 | 1449 | { |
2f9fc8ef | 1450 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1451 | && lab2[0] == '*' && lab2[1] == 'L'); | |
a08b74c8 | 1452 | |
1453 | if (islocaldiff) | |
1454 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1455 | else | |
1456 | fprintf (file, "\t%s\t", ".long"); | |
1457 | assemble_name (file, lab1); | |
1458 | fprintf (file, "-"); | |
1459 | assemble_name (file, lab2); | |
1460 | if (islocaldiff) | |
1461 | fprintf (file, "\n\t.long L$set$%d", darwin_dwarf_label_counter++); | |
1462 | } | |
1463 | ||
f6940372 | 1464 | void |
b40da9a7 | 1465 | darwin_file_end (void) |
f6940372 | 1466 | { |
1467 | machopic_finish (asm_out_file); | |
1468 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1469 | { | |
1470 | constructor_section (); | |
1471 | destructor_section (); | |
1472 | ASM_OUTPUT_ALIGN (asm_out_file, 1); | |
1473 | } | |
1474 | } | |
1475 | ||
1f3233d1 | 1476 | #include "gt-darwin.h" |