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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
5b86a469 KH |
2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004, |
3 | 2005 | |
ee890fe2 SS |
4 | Free Software Foundation, Inc. |
5 | Contributed by Apple Computer Inc. | |
6 | ||
7ec022b2 | 7 | This file is part of GCC. |
ee890fe2 | 8 | |
7ec022b2 | 9 | GCC is free software; you can redistribute it and/or modify |
ee890fe2 SS |
10 | it under the terms of the GNU General Public License as published by |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
7ec022b2 | 14 | GCC is distributed in the hope that it will be useful, |
ee890fe2 SS |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
7ec022b2 | 20 | along with GCC; see the file COPYING. If not, write to |
39d14dda KC |
21 | the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
ee890fe2 SS |
23 | |
24 | #include "config.h" | |
25 | #include "system.h" | |
4977bab6 ZW |
26 | #include "coretypes.h" |
27 | #include "tm.h" | |
ee890fe2 SS |
28 | #include "rtl.h" |
29 | #include "regs.h" | |
30 | #include "hard-reg-set.h" | |
31 | #include "real.h" | |
32 | #include "insn-config.h" | |
33 | #include "conditions.h" | |
34 | #include "insn-flags.h" | |
35 | #include "output.h" | |
36 | #include "insn-attr.h" | |
37 | #include "flags.h" | |
38 | #include "tree.h" | |
39 | #include "expr.h" | |
40 | #include "reload.h" | |
ee890fe2 SS |
41 | #include "function.h" |
42 | #include "ggc.h" | |
3ac88239 | 43 | #include "langhooks.h" |
1adaa117 | 44 | #include "target.h" |
245ff137 | 45 | #include "tm_p.h" |
4c714dd4 | 46 | #include "toplev.h" |
11abc112 | 47 | #include "hashtab.h" |
ee890fe2 | 48 | |
699c914a MS |
49 | /* Darwin supports a feature called fix-and-continue, which is used |
50 | for rapid turn around debugging. When code is compiled with the | |
51 | -mfix-and-continue flag, two changes are made to the generated code | |
52 | that allow the system to do things that it would normally not be | |
53 | able to do easily. These changes allow gdb to load in | |
54 | recompilation of a translation unit that has been changed into a | |
55 | running program and replace existing functions and methods of that | |
56 | translation unit with with versions of those functions and methods | |
57 | from the newly compiled translation unit. The new functions access | |
d6ff8575 MS |
58 | the existing static symbols from the old translation unit, if the |
59 | symbol existed in the unit to be replaced, and from the new | |
60 | translation unit, otherwise. | |
699c914a | 61 | |
de2ab0ca | 62 | The changes are to insert 5 nops at the beginning of all functions |
d6ff8575 | 63 | and to use indirection to get at static symbols. The 5 nops |
699c914a MS |
64 | are required by consumers of the generated code. Currently, gdb |
65 | uses this to patch in a jump to the overriding function, this | |
66 | allows all uses of the old name to forward to the replacement, | |
c112cf2b | 67 | including existing function pointers and virtual methods. See |
699c914a MS |
68 | rs6000_emit_prologue for the code that handles the nop insertions. |
69 | ||
70 | The added indirection allows gdb to redirect accesses to static | |
d6ff8575 MS |
71 | symbols from the newly loaded translation unit to the existing |
72 | symbol, if any. @code{static} symbols are special and are handled by | |
73 | setting the second word in the .non_lazy_symbol_pointer data | |
74 | structure to symbol. See indirect_data for the code that handles | |
75 | the extra indirection, and machopic_output_indirection and its use | |
76 | of MACHO_SYMBOL_STATIC for the code that handles @code{static} | |
77 | symbol indirection. */ | |
699c914a MS |
78 | |
79 | ||
ee890fe2 | 80 | int |
9c808aad | 81 | name_needs_quotes (const char *name) |
ee890fe2 SS |
82 | { |
83 | int c; | |
84 | while ((c = *name++) != '\0') | |
6f94a68e | 85 | if (! ISIDNUM (c) && c != '.' && c != '$') |
ee890fe2 SS |
86 | return 1; |
87 | return 0; | |
88 | } | |
89 | ||
16515e5c | 90 | /* Return true if SYM_REF can be used without an indirection. */ |
11abc112 MM |
91 | static int |
92 | machopic_symbol_defined_p (rtx sym_ref) | |
ee890fe2 | 93 | { |
16515e5c AP |
94 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
95 | return true; | |
96 | ||
97 | /* If a symbol references local and is not an extern to this | |
98 | file, then the symbol might be able to declared as defined. */ | |
99 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
100 | { | |
101 | /* If the symbol references a variable and the variable is a | |
102 | common symbol, then this symbol is not defined. */ | |
103 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
104 | { | |
105 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
106 | if (!decl) | |
107 | return true; | |
108 | if (DECL_COMMON (decl)) | |
109 | return false; | |
110 | } | |
111 | return true; | |
112 | } | |
113 | return false; | |
ee890fe2 SS |
114 | } |
115 | ||
11abc112 MM |
116 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
117 | reference, which will not be changed. */ | |
9c808aad | 118 | |
ee890fe2 | 119 | enum machopic_addr_class |
11abc112 | 120 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 121 | { |
11abc112 MM |
122 | int flags; |
123 | bool function_p; | |
124 | ||
125 | flags = SYMBOL_REF_FLAGS (sym_ref); | |
126 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
127 | if (machopic_symbol_defined_p (sym_ref)) | |
128 | return (function_p | |
129 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); | |
130 | else | |
131 | return (function_p | |
132 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); | |
ee890fe2 SS |
133 | } |
134 | ||
699c914a MS |
135 | #ifndef TARGET_FIX_AND_CONTINUE |
136 | #define TARGET_FIX_AND_CONTINUE 0 | |
137 | #endif | |
138 | ||
139 | /* Indicate when fix-and-continue style code generation is being used | |
140 | and when a reference to data should be indirected so that it can be | |
35fd3193 | 141 | rebound in a new translation unit to reference the original instance |
699c914a MS |
142 | of that data. Symbol names that are for code generation local to |
143 | the translation unit are bound to the new translation unit; | |
144 | currently this means symbols that begin with L or _OBJC_; | |
145 | otherwise, we indicate that an indirect reference should be made to | |
146 | permit the runtime to rebind new instances of the translation unit | |
147 | to the original instance of the data. */ | |
148 | ||
149 | static int | |
150 | indirect_data (rtx sym_ref) | |
151 | { | |
152 | int lprefix; | |
153 | const char *name; | |
154 | ||
155 | /* If we aren't generating fix-and-continue code, don't do anything special. */ | |
156 | if (TARGET_FIX_AND_CONTINUE == 0) | |
157 | return 0; | |
158 | ||
159 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
160 | are indirected. Symbols that begin with L and _OBJC_ are always | |
161 | bound to the current translation unit as they are used for | |
162 | generated local data of the translation unit. */ | |
163 | ||
164 | name = XSTR (sym_ref, 0); | |
165 | ||
166 | lprefix = (((name[0] == '*' || name[0] == '&') | |
167 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
ad6aaeb6 | 168 | || (strncmp (name, "_OBJC_", 6) == 0)); |
699c914a MS |
169 | |
170 | return ! lprefix; | |
171 | } | |
172 | ||
173 | ||
ee890fe2 | 174 | static int |
11abc112 | 175 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 176 | { |
699c914a MS |
177 | if (indirect_data (sym_ref)) |
178 | return 0; | |
179 | ||
11abc112 | 180 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
181 | { |
182 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 183 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
184 | return 1; |
185 | default: | |
186 | return 0; | |
187 | } | |
188 | } | |
189 | ||
ee890fe2 | 190 | void |
11abc112 | 191 | machopic_define_symbol (rtx mem) |
ee890fe2 | 192 | { |
11abc112 | 193 | rtx sym_ref; |
992d08b1 NS |
194 | |
195 | gcc_assert (GET_CODE (mem) == MEM); | |
11abc112 MM |
196 | sym_ref = XEXP (mem, 0); |
197 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
198 | } |
199 | ||
6788f5ca | 200 | static GTY(()) char * function_base; |
ee890fe2 | 201 | |
92c1a778 | 202 | const char * |
9c808aad | 203 | machopic_function_base_name (void) |
ee890fe2 | 204 | { |
ab82a49f | 205 | /* if dynamic-no-pic is on, we should not get here */ |
992d08b1 | 206 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
ee890fe2 | 207 | |
1622229c | 208 | if (function_base == NULL) |
9c808aad | 209 | function_base = |
1622229c AP |
210 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
211 | ||
212 | current_function_uses_pic_offset_table = 1; | |
213 | ||
214 | return function_base; | |
215 | } | |
216 | ||
11abc112 MM |
217 | /* Return a SYMBOL_REF for the PIC function base. */ |
218 | ||
219 | rtx | |
220 | machopic_function_base_sym (void) | |
221 | { | |
222 | rtx sym_ref; | |
223 | ||
224 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
225 | SYMBOL_REF_FLAGS (sym_ref) | |
226 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); | |
227 | return sym_ref; | |
228 | } | |
229 | ||
14a07c92 PB |
230 | /* Return either ORIG or (const:P (minus:P ORIG PIC_BASE)), depending |
231 | on whether pic_base is NULL or not. */ | |
232 | static inline rtx | |
233 | gen_pic_offset (rtx orig, rtx pic_base) | |
234 | { | |
235 | if (!pic_base) | |
236 | return orig; | |
237 | else | |
238 | return gen_rtx_CONST (Pmode, gen_rtx_MINUS (Pmode, orig, pic_base)); | |
239 | } | |
240 | ||
1622229c AP |
241 | static GTY(()) const char * function_base_func_name; |
242 | static GTY(()) int current_pic_label_num; | |
243 | ||
244 | void | |
245 | machopic_output_function_base_name (FILE *file) | |
246 | { | |
247 | const char *current_name; | |
248 | ||
ff482c8d | 249 | /* If dynamic-no-pic is on, we should not get here. */ |
992d08b1 | 250 | gcc_assert (!MACHO_DYNAMIC_NO_PIC_P); |
9c808aad | 251 | current_name = |
1622229c | 252 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
6788f5ca | 253 | if (function_base_func_name != current_name) |
ee890fe2 | 254 | { |
ee890fe2 | 255 | ++current_pic_label_num; |
6788f5ca | 256 | function_base_func_name = current_name; |
ee890fe2 | 257 | } |
1622229c | 258 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 SS |
259 | } |
260 | ||
11abc112 MM |
261 | /* The suffix attached to non-lazy pointer symbols. */ |
262 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
263 | /* The suffix attached to stub symbols. */ | |
264 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 265 | |
11abc112 | 266 | typedef struct machopic_indirection GTY (()) |
ee890fe2 | 267 | { |
11abc112 MM |
268 | /* The SYMBOL_REF for the entity referenced. */ |
269 | rtx symbol; | |
1adaa117 GK |
270 | /* The name of the stub or non-lazy pointer. */ |
271 | const char * ptr_name; | |
11abc112 MM |
272 | /* True iff this entry is for a stub (as opposed to a non-lazy |
273 | pointer). */ | |
274 | bool stub_p; | |
275 | /* True iff this stub or pointer pointer has been referenced. */ | |
276 | bool used; | |
277 | } machopic_indirection; | |
278 | ||
279 | /* A table mapping stub names and non-lazy pointer names to | |
280 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
281 | ||
282 | static GTY ((param_is (struct machopic_indirection))) htab_t | |
283 | machopic_indirections; | |
284 | ||
285 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
286 | ||
287 | static hashval_t | |
288 | machopic_indirection_hash (const void *slot) | |
289 | { | |
290 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
1adaa117 | 291 | return htab_hash_string (p->ptr_name); |
11abc112 | 292 | } |
9c808aad | 293 | |
11abc112 MM |
294 | /* Returns true if the KEY is the same as that associated with |
295 | SLOT. */ | |
296 | ||
297 | static int | |
298 | machopic_indirection_eq (const void *slot, const void *key) | |
299 | { | |
1adaa117 | 300 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
11abc112 | 301 | } |
ee890fe2 | 302 | |
11abc112 MM |
303 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
304 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 305 | |
11abc112 MM |
306 | const char * |
307 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
308 | { | |
309 | char *buffer; | |
310 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 311 | size_t namelen = strlen (name); |
11abc112 | 312 | machopic_indirection *p; |
1adaa117 | 313 | void ** slot; |
3d20d4d8 MS |
314 | bool saw_star = false; |
315 | bool needs_quotes; | |
316 | const char *suffix; | |
317 | const char *prefix = user_label_prefix; | |
318 | const char *quote = ""; | |
0a6a4494 AO |
319 | tree id; |
320 | ||
321 | id = maybe_get_identifier (name); | |
322 | if (id) | |
323 | { | |
324 | tree id_orig = id; | |
325 | ||
326 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
327 | id = TREE_CHAIN (id); | |
328 | if (id != id_orig) | |
329 | { | |
330 | name = IDENTIFIER_POINTER (id); | |
331 | namelen = strlen (name); | |
332 | } | |
333 | } | |
11abc112 | 334 | |
3d20d4d8 | 335 | if (name[0] == '*') |
df56a27f | 336 | { |
3d20d4d8 MS |
337 | saw_star = true; |
338 | prefix = ""; | |
339 | ++name; | |
340 | --namelen; | |
11abc112 | 341 | } |
3d20d4d8 MS |
342 | |
343 | needs_quotes = name_needs_quotes (name); | |
344 | if (needs_quotes) | |
11abc112 | 345 | { |
3d20d4d8 | 346 | quote = "\""; |
df56a27f SS |
347 | } |
348 | ||
3d20d4d8 MS |
349 | if (stub_p) |
350 | suffix = STUB_SUFFIX; | |
351 | else | |
352 | suffix = NON_LAZY_POINTER_SUFFIX; | |
353 | ||
354 | buffer = alloca (strlen ("&L") | |
355 | + strlen (prefix) | |
356 | + namelen | |
357 | + strlen (suffix) | |
358 | + 2 * strlen (quote) | |
359 | + 1 /* '\0' */); | |
360 | ||
361 | /* Construct the name of the non-lazy pointer or stub. */ | |
362 | sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); | |
363 | ||
1adaa117 GK |
364 | if (!machopic_indirections) |
365 | machopic_indirections = htab_create_ggc (37, | |
366 | machopic_indirection_hash, | |
367 | machopic_indirection_eq, | |
368 | /*htab_del=*/NULL); | |
369 | ||
370 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, | |
371 | htab_hash_string (buffer), INSERT); | |
372 | if (*slot) | |
373 | { | |
374 | p = (machopic_indirection *) *slot; | |
375 | } | |
376 | else | |
11abc112 | 377 | { |
11abc112 MM |
378 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
379 | p->symbol = sym_ref; | |
1adaa117 | 380 | p->ptr_name = xstrdup (buffer); |
11abc112 | 381 | p->stub_p = stub_p; |
1adaa117 GK |
382 | p->used = false; |
383 | *slot = p; | |
11abc112 MM |
384 | } |
385 | ||
1adaa117 | 386 | return p->ptr_name; |
ee890fe2 SS |
387 | } |
388 | ||
11abc112 | 389 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 390 | |
11abc112 MM |
391 | const char* |
392 | machopic_mcount_stub_name (void) | |
ee890fe2 | 393 | { |
76f60aa5 AP |
394 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
395 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
396 | } |
397 | ||
11abc112 MM |
398 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
399 | or non-lazy pointer as used -- and mark the object to which the | |
400 | pointer/stub refers as used as well, since the pointer/stub will | |
401 | emit a reference to it. */ | |
402 | ||
ee890fe2 | 403 | void |
11abc112 | 404 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 405 | { |
11abc112 MM |
406 | machopic_indirection *p; |
407 | ||
408 | p = ((machopic_indirection *) | |
1adaa117 GK |
409 | (htab_find_with_hash (machopic_indirections, name, |
410 | htab_hash_string (name)))); | |
411 | if (p && ! p->used) | |
11abc112 | 412 | { |
1adaa117 GK |
413 | const char *real_name; |
414 | tree id; | |
415 | ||
416 | p->used = true; | |
417 | ||
ca472546 GK |
418 | /* Do what output_addr_const will do when we actually call it. */ |
419 | if (SYMBOL_REF_DECL (p->symbol)) | |
420 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
421 | ||
422 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
1adaa117 GK |
423 | |
424 | id = maybe_get_identifier (real_name); | |
425 | if (id) | |
426 | mark_referenced (id); | |
11abc112 | 427 | } |
ee890fe2 SS |
428 | } |
429 | ||
430 | /* Transform ORIG, which may be any data source, to the corresponding | |
431 | source using indirections. */ | |
432 | ||
433 | rtx | |
9c808aad | 434 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
435 | { |
436 | rtx ptr_ref = orig; | |
9c808aad | 437 | |
ee890fe2 SS |
438 | if (! MACHOPIC_INDIRECT) |
439 | return orig; | |
440 | ||
441 | if (GET_CODE (orig) == SYMBOL_REF) | |
442 | { | |
11abc112 | 443 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
444 | |
445 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
446 | { | |
447 | #if defined (TARGET_TOC) | |
4f8dbd34 AP |
448 | /* Create a new register for CSE opportunities. */ |
449 | rtx hi_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); | |
450 | emit_insn (gen_macho_high (hi_reg, orig)); | |
451 | emit_insn (gen_macho_low (reg, hi_reg, orig)); | |
ab82a49f AP |
452 | #else |
453 | /* some other cpu -- writeme! */ | |
992d08b1 | 454 | gcc_unreachable (); |
ab82a49f AP |
455 | #endif |
456 | return reg; | |
457 | } | |
458 | else if (defined) | |
ee890fe2 | 459 | { |
7ae8cf75 | 460 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
11abc112 | 461 | rtx pic_base = machopic_function_base_sym (); |
14a07c92 | 462 | rtx offset = gen_pic_offset (orig, pic_base); |
7ae8cf75 | 463 | #endif |
ee890fe2 SS |
464 | |
465 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
d9b46dfb | 466 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
ee890fe2 | 467 | |
992d08b1 | 468 | gcc_assert (reg); |
ee890fe2 | 469 | |
6f94a68e GK |
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))); | |
ee890fe2 SS |
475 | |
476 | orig = reg; | |
477 | #else | |
478 | #if defined (HAVE_lo_sum) | |
992d08b1 | 479 | gcc_assert (reg); |
ee890fe2 | 480 | |
6f94a68e GK |
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, pic_offset_table_rtx)); | |
ee890fe2 | 486 | |
6f94a68e | 487 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
ee890fe2 SS |
488 | #endif |
489 | #endif | |
490 | return orig; | |
491 | } | |
492 | ||
828a4fe4 | 493 | ptr_ref = (gen_rtx_SYMBOL_REF |
11abc112 MM |
494 | (Pmode, |
495 | machopic_indirection_name (orig, /*stub_p=*/false))); | |
ee890fe2 | 496 | |
542a8afa | 497 | SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); |
c0d594f1 | 498 | |
542a8afa | 499 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 500 | machopic_define_symbol (ptr_ref); |
ee890fe2 SS |
501 | |
502 | return ptr_ref; | |
503 | } | |
504 | else if (GET_CODE (orig) == CONST) | |
505 | { | |
506 | rtx base, result; | |
507 | ||
508 | /* legitimize both operands of the PLUS */ | |
509 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
510 | { | |
511 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
512 | reg); | |
513 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
514 | (base == reg ? 0 : reg)); | |
515 | } | |
9c808aad | 516 | else |
ee890fe2 SS |
517 | return orig; |
518 | ||
519 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 520 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 521 | else |
6f94a68e | 522 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 523 | |
ee890fe2 SS |
524 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
525 | { | |
526 | if (reg) | |
527 | { | |
528 | emit_move_insn (reg, result); | |
529 | result = reg; | |
530 | } | |
531 | else | |
532 | { | |
533 | result = force_reg (GET_MODE (result), result); | |
534 | } | |
535 | } | |
536 | ||
537 | return result; | |
538 | ||
539 | } | |
540 | else if (GET_CODE (orig) == MEM) | |
541 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
542 | /* When the target is i386, this code prevents crashes due to the | |
543 | compiler's ignorance on how to move the PIC base register to | |
544 | other registers. (The reload phase sometimes introduces such | |
545 | insns.) */ | |
546 | else if (GET_CODE (orig) == PLUS | |
547 | && GET_CODE (XEXP (orig, 0)) == REG | |
548 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
549 | #ifdef I386 | |
550 | /* Prevent the same register from being erroneously used | |
551 | as both the base and index registers. */ | |
552 | && GET_CODE (XEXP (orig, 1)) == CONST | |
553 | #endif | |
554 | && reg) | |
555 | { | |
556 | emit_move_insn (reg, XEXP (orig, 0)); | |
557 | XEXP (ptr_ref, 0) = reg; | |
558 | } | |
559 | return ptr_ref; | |
560 | } | |
561 | ||
ee890fe2 SS |
562 | /* Transform TARGET (a MEM), which is a function call target, to the |
563 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
564 | ||
565 | rtx | |
9c808aad | 566 | machopic_indirect_call_target (rtx target) |
ee890fe2 SS |
567 | { |
568 | if (GET_CODE (target) != MEM) | |
569 | return target; | |
570 | ||
11abc112 MM |
571 | if (MACHOPIC_INDIRECT |
572 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF | |
573 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
574 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 575 | { |
11abc112 MM |
576 | rtx sym_ref = XEXP (target, 0); |
577 | const char *stub_name = machopic_indirection_name (sym_ref, | |
578 | /*stub_p=*/true); | |
579 | enum machine_mode mode = GET_MODE (sym_ref); | |
580 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
581 | ||
582 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); | |
583 | SYMBOL_REF_DECL (XEXP (target, 0)) = decl; | |
389fdba0 | 584 | MEM_READONLY_P (target) = 1; |
542a8afa | 585 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
586 | } |
587 | ||
588 | return target; | |
589 | } | |
590 | ||
591 | rtx | |
9c808aad | 592 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
ee890fe2 SS |
593 | { |
594 | rtx pic_ref = orig; | |
595 | ||
ab82a49f | 596 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
597 | return orig; |
598 | ||
599 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
600 | if (GET_CODE (orig) == LABEL_REF | |
601 | || (GET_CODE (orig) == SYMBOL_REF | |
602 | )) | |
603 | { | |
604 | /* addr(foo) = &func+(foo-func) */ | |
605 | rtx pic_base; | |
606 | ||
607 | orig = machopic_indirect_data_reference (orig, reg); | |
608 | ||
9c808aad | 609 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
610 | && GET_CODE (XEXP (orig, 0)) == REG) |
611 | { | |
612 | if (reg == 0) | |
613 | return force_reg (mode, orig); | |
614 | ||
615 | emit_move_insn (reg, orig); | |
616 | return reg; | |
9c808aad | 617 | } |
ee890fe2 | 618 | |
14a07c92 | 619 | /* if dynamic-no-pic we don't have a pic base */ |
ab82a49f | 620 | if (MACHO_DYNAMIC_NO_PIC_P) |
14a07c92 | 621 | pic_base = NULL; |
ab82a49f | 622 | else |
11abc112 | 623 | pic_base = machopic_function_base_sym (); |
ee890fe2 SS |
624 | |
625 | if (GET_CODE (orig) == MEM) | |
626 | { | |
627 | if (reg == 0) | |
628 | { | |
992d08b1 NS |
629 | gcc_assert (!reload_in_progress); |
630 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 631 | } |
9c808aad | 632 | |
ee890fe2 | 633 | #ifdef HAVE_lo_sum |
ab82a49f AP |
634 | if (MACHO_DYNAMIC_NO_PIC_P |
635 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
636 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
637 | { | |
638 | #if defined (TARGET_TOC) /* ppc */ | |
639 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
640 | rtx asym = XEXP (orig, 0); | |
641 | rtx mem; | |
642 | ||
b8a55285 | 643 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa RH |
644 | mem = gen_const_mem (GET_MODE (orig), |
645 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
6f94a68e | 646 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
ab82a49f AP |
647 | #else |
648 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
992d08b1 | 649 | gcc_unreachable (); |
ab82a49f AP |
650 | #endif |
651 | pic_ref = reg; | |
652 | } | |
653 | else | |
9c808aad | 654 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
655 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
656 | { | |
14a07c92 | 657 | rtx offset = gen_pic_offset (XEXP (orig, 0), pic_base); |
ee890fe2 SS |
658 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
659 | /* Generating a new reg may expose opportunities for | |
660 | common subexpression elimination. */ | |
49bd1d27 | 661 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
6f94a68e GK |
662 | rtx mem; |
663 | rtx insn; | |
664 | rtx sum; | |
665 | ||
666 | sum = gen_rtx_HIGH (Pmode, offset); | |
667 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
668 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 669 | |
6f94a68e GK |
670 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
671 | ||
542a8afa RH |
672 | mem = gen_const_mem (GET_MODE (orig), |
673 | gen_rtx_LO_SUM (Pmode, | |
674 | hi_sum_reg, offset)); | |
6f94a68e GK |
675 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
676 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, | |
677 | REG_NOTES (insn)); | |
678 | ||
679 | pic_ref = reg; | |
ee890fe2 | 680 | #else |
6f94a68e GK |
681 | emit_insn (gen_rtx_USE (VOIDmode, |
682 | gen_rtx_REG (Pmode, | |
683 | PIC_OFFSET_TABLE_REGNUM))); | |
684 | ||
685 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
686 | gen_rtx_HIGH (Pmode, | |
687 | gen_rtx_CONST (Pmode, | |
688 | offset)))); | |
689 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
690 | gen_rtx_LO_SUM (Pmode, reg, | |
691 | gen_rtx_CONST (Pmode, offset)))); | |
692 | pic_ref = gen_rtx_PLUS (Pmode, | |
693 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
694 | #endif |
695 | } | |
696 | else | |
697 | #endif /* HAVE_lo_sum */ | |
698 | { | |
699 | rtx pic = pic_offset_table_rtx; | |
700 | if (GET_CODE (pic) != REG) | |
701 | { | |
702 | emit_move_insn (reg, pic); | |
703 | pic = reg; | |
704 | } | |
705 | #if 0 | |
6f94a68e GK |
706 | emit_insn (gen_rtx_USE (VOIDmode, |
707 | gen_rtx_REG (Pmode, | |
708 | PIC_OFFSET_TABLE_REGNUM))); | |
ee890fe2 SS |
709 | #endif |
710 | ||
14a07c92 PB |
711 | pic_ref = gen_rtx_PLUS (Pmode, pic, |
712 | gen_pic_offset (XEXP (orig, 0), | |
713 | pic_base)); | |
ee890fe2 | 714 | } |
9c808aad | 715 | |
ee890fe2 | 716 | #if !defined (TARGET_TOC) |
ee890fe2 | 717 | emit_move_insn (reg, pic_ref); |
542a8afa | 718 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 719 | #endif |
ee890fe2 SS |
720 | } |
721 | else | |
722 | { | |
723 | ||
724 | #ifdef HAVE_lo_sum | |
9c808aad | 725 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
726 | || GET_CODE (orig) == LABEL_REF) |
727 | { | |
14a07c92 | 728 | rtx offset = gen_pic_offset (orig, pic_base); |
ee890fe2 SS |
729 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
730 | rtx hi_sum_reg; | |
731 | ||
732 | if (reg == 0) | |
733 | { | |
992d08b1 NS |
734 | gcc_assert (!reload_in_progress); |
735 | reg = gen_reg_rtx (Pmode); | |
ee890fe2 | 736 | } |
9c808aad | 737 | |
ee890fe2 SS |
738 | hi_sum_reg = reg; |
739 | ||
6f94a68e GK |
740 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
741 | (MACHO_DYNAMIC_NO_PIC_P) | |
742 | ? gen_rtx_HIGH (Pmode, offset) | |
743 | : gen_rtx_PLUS (Pmode, | |
744 | pic_offset_table_rtx, | |
745 | gen_rtx_HIGH (Pmode, | |
746 | offset)))); | |
747 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
748 | gen_rtx_LO_SUM (Pmode, | |
749 | hi_sum_reg, offset))); | |
ee890fe2 SS |
750 | pic_ref = reg; |
751 | #else | |
6f94a68e GK |
752 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
753 | gen_rtx_HIGH (Pmode, offset))); | |
754 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
755 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
756 | pic_ref = gen_rtx_PLUS (Pmode, | |
757 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
758 | #endif |
759 | } | |
760 | else | |
761 | #endif /* HAVE_lo_sum */ | |
762 | { | |
83cf88cb AP |
763 | if (REG_P (orig) |
764 | || GET_CODE (orig) == SUBREG) | |
ee890fe2 SS |
765 | { |
766 | return orig; | |
767 | } | |
768 | else | |
769 | { | |
770 | rtx pic = pic_offset_table_rtx; | |
771 | if (GET_CODE (pic) != REG) | |
772 | { | |
773 | emit_move_insn (reg, pic); | |
774 | pic = reg; | |
775 | } | |
776 | #if 0 | |
6f94a68e GK |
777 | emit_insn (gen_rtx_USE (VOIDmode, |
778 | pic_offset_table_rtx)); | |
ee890fe2 | 779 | #endif |
6f94a68e GK |
780 | pic_ref = gen_rtx_PLUS (Pmode, |
781 | pic, | |
14a07c92 | 782 | gen_pic_offset (orig, pic_base)); |
ee890fe2 SS |
783 | } |
784 | } | |
785 | } | |
786 | ||
ee890fe2 SS |
787 | if (GET_CODE (pic_ref) != REG) |
788 | { | |
789 | if (reg != 0) | |
790 | { | |
791 | emit_move_insn (reg, pic_ref); | |
792 | return reg; | |
793 | } | |
794 | else | |
795 | { | |
796 | return force_reg (mode, pic_ref); | |
797 | } | |
798 | } | |
799 | else | |
800 | { | |
801 | return pic_ref; | |
802 | } | |
803 | } | |
804 | ||
805 | else if (GET_CODE (orig) == SYMBOL_REF) | |
806 | return orig; | |
807 | ||
808 | else if (GET_CODE (orig) == PLUS | |
809 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
810 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
811 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
812 | && XEXP (orig, 0) != pic_offset_table_rtx | |
813 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 814 | |
ee890fe2 SS |
815 | { |
816 | rtx base; | |
817 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
818 | ||
819 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
820 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
821 | Pmode, (base == reg ? 0 : reg)); | |
822 | if (GET_CODE (orig) == CONST_INT) | |
823 | { | |
ed8908e7 | 824 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
825 | is_complex = 1; |
826 | } | |
827 | else | |
6f94a68e | 828 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 829 | |
ee890fe2 SS |
830 | if (reg && is_complex) |
831 | { | |
832 | emit_move_insn (reg, pic_ref); | |
833 | pic_ref = reg; | |
834 | } | |
835 | /* Likewise, should we set special REG_NOTEs here? */ | |
836 | } | |
837 | ||
838 | else if (GET_CODE (orig) == CONST) | |
839 | { | |
840 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
841 | } | |
842 | ||
843 | else if (GET_CODE (orig) == MEM | |
844 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
845 | { | |
846 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 847 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
848 | emit_move_insn (reg, addr); |
849 | pic_ref = reg; | |
850 | } | |
851 | ||
852 | return pic_ref; | |
853 | } | |
854 | ||
11abc112 MM |
855 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
856 | DATA is the FILE* for assembly output. Called from | |
857 | htab_traverse. */ | |
ee890fe2 | 858 | |
11abc112 MM |
859 | static int |
860 | machopic_output_indirection (void **slot, void *data) | |
ee890fe2 | 861 | { |
11abc112 MM |
862 | machopic_indirection *p = *((machopic_indirection **) slot); |
863 | FILE *asm_out_file = (FILE *) data; | |
864 | rtx symbol; | |
865 | const char *sym_name; | |
866 | const char *ptr_name; | |
867 | ||
868 | if (!p->used) | |
869 | return 1; | |
ee890fe2 | 870 | |
11abc112 MM |
871 | symbol = p->symbol; |
872 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 873 | ptr_name = p->ptr_name; |
11abc112 MM |
874 | |
875 | if (p->stub_p) | |
ee890fe2 | 876 | { |
ee890fe2 SS |
877 | char *sym; |
878 | char *stub; | |
0a6a4494 AO |
879 | tree id; |
880 | ||
881 | id = maybe_get_identifier (sym_name); | |
882 | if (id) | |
883 | { | |
884 | tree id_orig = id; | |
885 | ||
886 | while (IDENTIFIER_TRANSPARENT_ALIAS (id)) | |
887 | id = TREE_CHAIN (id); | |
888 | if (id != id_orig) | |
889 | sym_name = IDENTIFIER_POINTER (id); | |
890 | } | |
ee890fe2 | 891 | |
ee890fe2 SS |
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] == '+') | |
9c808aad | 896 | strcpy (sym, sym_name); |
ee890fe2 | 897 | else |
789a4ea3 | 898 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 899 | |
11abc112 MM |
900 | stub = alloca (strlen (ptr_name) + 2); |
901 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
902 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 903 | else |
11abc112 | 904 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 905 | |
ca472546 | 906 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 907 | } |
699c914a | 908 | else if (! indirect_data (symbol) |
156a126c MS |
909 | && (machopic_symbol_defined_p (symbol) |
910 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 911 | { |
11abc112 MM |
912 | data_section (); |
913 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); | |
914 | assemble_label (ptr_name); | |
915 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
916 | GET_MODE_SIZE (Pmode), | |
917 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 918 | } |
11abc112 MM |
919 | else |
920 | { | |
699c914a MS |
921 | rtx init = const0_rtx; |
922 | ||
11abc112 MM |
923 | machopic_nl_symbol_ptr_section (); |
924 | assemble_name (asm_out_file, ptr_name); | |
925 | fprintf (asm_out_file, ":\n"); | |
926 | ||
927 | fprintf (asm_out_file, "\t.indirect_symbol "); | |
928 | assemble_name (asm_out_file, sym_name); | |
929 | fprintf (asm_out_file, "\n"); | |
930 | ||
699c914a MS |
931 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
932 | have their symbol name instead of 0 in the second entry of | |
933 | the non-lazy symbol pointer data structure when they are | |
934 | defined. This allows the runtime to rebind newer instances | |
935 | of the translation unit with the original instance of the | |
d6ff8575 | 936 | symbol. */ |
699c914a MS |
937 | |
938 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
939 | && machopic_symbol_defined_p (symbol)) | |
940 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
941 | ||
942 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
943 | GET_MODE_ALIGNMENT (Pmode), 1); |
944 | } | |
945 | ||
946 | return 1; | |
947 | } | |
948 | ||
949 | void | |
950 | machopic_finish (FILE *asm_out_file) | |
951 | { | |
952 | if (machopic_indirections) | |
699c914a | 953 | htab_traverse_noresize (machopic_indirections, |
11abc112 MM |
954 | machopic_output_indirection, |
955 | asm_out_file); | |
ee890fe2 SS |
956 | } |
957 | ||
9c808aad AJ |
958 | int |
959 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
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) | |
11abc112 | 967 | return machopic_symbol_defined_p (op); |
ee890fe2 SS |
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 | |
11abc112 MM |
978 | && machopic_symbol_defined_p (XEXP (op, 0)) |
979 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
ee890fe2 SS |
980 | return 1; |
981 | ||
ee890fe2 SS |
982 | return 0; |
983 | } | |
df56a27f SS |
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 | |
9c808aad | 990 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 991 | { |
353e51f8 | 992 | rtx sym_ref; |
df56a27f | 993 | |
e1a4211d SS |
994 | /* Do the standard encoding things first. */ |
995 | default_encode_section_info (decl, rtl, first); | |
996 | ||
11abc112 MM |
997 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
998 | return; | |
e1a4211d | 999 | |
11abc112 MM |
1000 | sym_ref = XEXP (rtl, 0); |
1001 | if (TREE_CODE (decl) == VAR_DECL) | |
1002 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
1003 | ||
1004 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 1005 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
df56a27f SS |
1006 | && ((TREE_STATIC (decl) |
1007 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 1008 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 1009 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 1010 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a | 1011 | |
d6ff8575 | 1012 | if (! TREE_PUBLIC (decl)) |
699c914a | 1013 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; |
4e08ba6c | 1014 | } |
2cc07db4 | 1015 | |
8e3e233b DP |
1016 | void |
1017 | darwin_mark_decl_preserved (const char *name) | |
1018 | { | |
1019 | fprintf (asm_out_file, ".no_dead_strip "); | |
1020 | assemble_name (asm_out_file, name); | |
1021 | fputc ('\n', asm_out_file); | |
1022 | } | |
1023 | ||
ae46c4e0 | 1024 | void |
9c808aad AJ |
1025 | machopic_select_section (tree exp, int reloc, |
1026 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 | 1027 | { |
3d7964d5 | 1028 | void (*base_function)(void); |
f1a66265 GK |
1029 | bool weak_p = DECL_P (exp) && DECL_WEAK (exp); |
1030 | static void (* const base_funs[][2])(void) = { | |
1031 | { text_section, text_coal_section }, | |
87c8b4be | 1032 | { unlikely_text_section, text_unlikely_coal_section }, |
f1a66265 GK |
1033 | { readonly_data_section, const_coal_section }, |
1034 | { const_data_section, const_data_coal_section }, | |
1035 | { data_section, data_coal_section } | |
1036 | }; | |
1037 | ||
87c8b4be CT |
1038 | if (reloc == 0 |
1039 | && (last_text_section == in_text_unlikely | |
1040 | || last_text_section == in_text_unlikely_coal)) | |
1041 | reloc = 1; | |
1042 | ||
f1a66265 GK |
1043 | if (TREE_CODE (exp) == FUNCTION_DECL) |
1044 | base_function = base_funs[reloc][weak_p]; | |
1045 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) | |
1046 | base_function = base_funs[2][weak_p]; | |
3d7964d5 | 1047 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
f1a66265 | 1048 | base_function = base_funs[3][weak_p]; |
3d7964d5 | 1049 | else |
f1a66265 | 1050 | base_function = base_funs[4][weak_p]; |
9c808aad | 1051 | |
3d7964d5 | 1052 | if (TREE_CODE (exp) == STRING_CST |
9c808aad | 1053 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1054 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
3d7964d5 GK |
1055 | cstring_section (); |
1056 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) | |
1057 | && flag_merge_constants) | |
ae46c4e0 | 1058 | { |
e1e04267 | 1059 | tree size = TYPE_SIZE_UNIT (TREE_TYPE (exp)); |
ae46c4e0 RH |
1060 | |
1061 | if (TREE_CODE (size) == INTEGER_CST && | |
1062 | TREE_INT_CST_LOW (size) == 4 && | |
1063 | TREE_INT_CST_HIGH (size) == 0) | |
1064 | literal4_section (); | |
1065 | else if (TREE_CODE (size) == INTEGER_CST && | |
1066 | TREE_INT_CST_LOW (size) == 8 && | |
1067 | TREE_INT_CST_HIGH (size) == 0) | |
1068 | literal8_section (); | |
1069 | else | |
3d7964d5 | 1070 | base_function (); |
ae46c4e0 RH |
1071 | } |
1072 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1073 | && TREE_TYPE (exp) | |
1074 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1075 | && TYPE_NAME (TREE_TYPE (exp))) | |
1076 | { | |
1077 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1078 | if (TREE_CODE (name) == TYPE_DECL) | |
1079 | name = DECL_NAME (name); | |
c64de75f ZL |
1080 | |
1081 | if (!strcmp (IDENTIFIER_POINTER (name), "__builtin_ObjCString")) | |
1082 | { | |
1083 | if (flag_next_runtime) | |
1084 | objc_constant_string_object_section (); | |
1085 | else | |
1086 | objc_string_object_section (); | |
1087 | } | |
ae46c4e0 | 1088 | else |
3d7964d5 | 1089 | base_function (); |
ae46c4e0 RH |
1090 | } |
1091 | else if (TREE_CODE (exp) == VAR_DECL && | |
1092 | DECL_NAME (exp) && | |
1093 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1094 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1095 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1096 | { | |
1097 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1098 | ||
1099 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
1100 | objc_cls_meth_section (); | |
1101 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) | |
1102 | objc_inst_meth_section (); | |
1103 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) | |
1104 | objc_cat_cls_meth_section (); | |
1105 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) | |
1106 | objc_cat_inst_meth_section (); | |
1107 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) | |
1108 | objc_class_vars_section (); | |
1109 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) | |
1110 | objc_instance_vars_section (); | |
1111 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) | |
1112 | objc_cat_cls_meth_section (); | |
1113 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) | |
1114 | objc_class_names_section (); | |
1115 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) | |
1116 | objc_meth_var_names_section (); | |
1117 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) | |
1118 | objc_meth_var_types_section (); | |
1119 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) | |
1120 | objc_cls_refs_section (); | |
1121 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) | |
1122 | objc_class_section (); | |
1123 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) | |
1124 | objc_meta_class_section (); | |
1125 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) | |
1126 | objc_category_section (); | |
1127 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) | |
1128 | objc_selector_refs_section (); | |
1129 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) | |
1130 | objc_selector_fixup_section (); | |
1131 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) | |
1132 | objc_symbols_section (); | |
1133 | else if (!strncmp (name, "_OBJC_MODULES", 13)) | |
1134 | objc_module_info_section (); | |
264fa2db ZL |
1135 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
1136 | objc_image_info_section (); | |
ae46c4e0 RH |
1137 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
1138 | objc_cat_inst_meth_section (); | |
1139 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) | |
1140 | objc_cat_cls_meth_section (); | |
1141 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) | |
1142 | objc_cat_cls_meth_section (); | |
1143 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) | |
1144 | objc_protocol_section (); | |
ae46c4e0 | 1145 | else |
3d7964d5 | 1146 | base_function (); |
ae46c4e0 RH |
1147 | } |
1148 | else | |
3d7964d5 | 1149 | base_function (); |
ae46c4e0 RH |
1150 | } |
1151 | ||
b64a1b53 | 1152 | /* This can be called with address expressions as "rtx". |
991b6592 | 1153 | They must go in "const". */ |
b64a1b53 RH |
1154 | |
1155 | void | |
9c808aad AJ |
1156 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1157 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 1158 | { |
b79d4265 SS |
1159 | if (GET_MODE_SIZE (mode) == 8 |
1160 | && (GET_CODE (x) == CONST_INT | |
1161 | || GET_CODE (x) == CONST_DOUBLE)) | |
b64a1b53 RH |
1162 | literal8_section (); |
1163 | else if (GET_MODE_SIZE (mode) == 4 | |
1164 | && (GET_CODE (x) == CONST_INT | |
1165 | || GET_CODE (x) == CONST_DOUBLE)) | |
1166 | literal4_section (); | |
86b0a4f3 | 1167 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1168 | && (GET_CODE (x) == SYMBOL_REF |
1169 | || GET_CODE (x) == CONST | |
1170 | || GET_CODE (x) == LABEL_REF)) | |
1171 | const_data_section (); | |
b64a1b53 RH |
1172 | else |
1173 | const_section (); | |
1174 | } | |
1175 | ||
2cc07db4 | 1176 | void |
9c808aad | 1177 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1178 | { |
ab82a49f | 1179 | if (MACHOPIC_INDIRECT) |
2cc07db4 RH |
1180 | mod_init_section (); |
1181 | else | |
1182 | constructor_section (); | |
c8af3574 RH |
1183 | assemble_align (POINTER_SIZE); |
1184 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1185 | |
ab82a49f | 1186 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1187 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1188 | } | |
1189 | ||
1190 | void | |
9c808aad | 1191 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1192 | { |
ab82a49f | 1193 | if (MACHOPIC_INDIRECT) |
2cc07db4 RH |
1194 | mod_term_section (); |
1195 | else | |
1196 | destructor_section (); | |
c8af3574 RH |
1197 | assemble_align (POINTER_SIZE); |
1198 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1199 | |
ab82a49f | 1200 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1201 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1202 | } | |
e2500fed | 1203 | |
5eb99654 | 1204 | void |
9c808aad | 1205 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1206 | { |
1207 | if (!!strncmp (name, "_OBJC_", 6)) | |
1208 | default_globalize_label (stream, name); | |
1209 | } | |
1210 | ||
4746cf84 | 1211 | void |
c18a5b6c MM |
1212 | darwin_asm_named_section (const char *name, |
1213 | unsigned int flags ATTRIBUTE_UNUSED, | |
1214 | tree decl ATTRIBUTE_UNUSED) | |
4746cf84 | 1215 | { |
f1a66265 | 1216 | fprintf (asm_out_file, "\t.section %s\n", name); |
4746cf84 MA |
1217 | } |
1218 | ||
4746cf84 | 1219 | void |
f1a66265 | 1220 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1221 | { |
f1a66265 | 1222 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1223 | } |
1224 | ||
005c1a13 GK |
1225 | /* Handle a "weak_import" attribute; arguments as in |
1226 | struct attribute_spec.handler. */ | |
1227 | ||
1228 | tree | |
1229 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1230 | tree ARG_UNUSED (args), | |
1231 | int ARG_UNUSED (flags), | |
1232 | bool * no_add_attrs) | |
1233 | { | |
d7001ae5 | 1234 | if (TREE_CODE (*node) != FUNCTION_DECL && TREE_CODE (*node) != VAR_DECL) |
005c1a13 | 1235 | { |
5c498b10 DD |
1236 | warning (OPT_Wattributes, "%qs attribute ignored", |
1237 | IDENTIFIER_POINTER (name)); | |
005c1a13 GK |
1238 | *no_add_attrs = true; |
1239 | } | |
1240 | else | |
1241 | declare_weak (*node); | |
1242 | ||
1243 | return NULL_TREE; | |
1244 | } | |
45cc4783 MS |
1245 | |
1246 | static void | |
1247 | no_dead_strip (FILE *file, const char *lab) | |
1248 | { | |
005c1a13 | 1249 | fprintf (file, ".no_dead_strip %s\n", lab); |
45cc4783 MS |
1250 | } |
1251 | ||
4746cf84 | 1252 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
1253 | The third parameter is nonzero if this is for exception handling. |
1254 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 1255 | FDE that we are omitting. */ |
eeab4d81 | 1256 | |
4746cf84 | 1257 | void |
eeab4d81 | 1258 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 MA |
1259 | { |
1260 | tree id = DECL_ASSEMBLER_NAME (decl) | |
1261 | ? DECL_ASSEMBLER_NAME (decl) | |
1262 | : DECL_NAME (decl); | |
1263 | ||
3d20d4d8 | 1264 | const char *prefix = user_label_prefix; |
4746cf84 MA |
1265 | |
1266 | const char *base = IDENTIFIER_POINTER (id); | |
1267 | unsigned int base_len = IDENTIFIER_LENGTH (id); | |
1268 | ||
1269 | const char *suffix = ".eh"; | |
4746cf84 MA |
1270 | |
1271 | int need_quotes = name_needs_quotes (base); | |
1272 | int quotes_len = need_quotes ? 2 : 0; | |
eeab4d81 MS |
1273 | char *lab; |
1274 | ||
1275 | if (! for_eh) | |
1276 | suffix = ".eh1"; | |
4746cf84 | 1277 | |
3d20d4d8 MS |
1278 | lab = xmalloc (strlen (prefix) |
1279 | + base_len + strlen (suffix) + quotes_len + 1); | |
4746cf84 MA |
1280 | lab[0] = '\0'; |
1281 | ||
1282 | if (need_quotes) | |
1283 | strcat(lab, "\""); | |
1284 | strcat(lab, prefix); | |
1285 | strcat(lab, base); | |
1286 | strcat(lab, suffix); | |
1287 | if (need_quotes) | |
1288 | strcat(lab, "\""); | |
1289 | ||
1290 | if (TREE_PUBLIC (decl)) | |
f1a66265 | 1291 | fprintf (file, "\t%s %s\n", |
4746cf84 MA |
1292 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1293 | ? ".globl" | |
1294 | : ".private_extern"), | |
1295 | lab); | |
1296 | ||
f1a66265 GK |
1297 | if (DECL_WEAK (decl)) |
1298 | fprintf (file, "\t.weak_definition %s\n", lab); | |
4746cf84 MA |
1299 | |
1300 | if (empty) | |
45cc4783 MS |
1301 | { |
1302 | fprintf (file, "%s = 0\n", lab); | |
1303 | ||
1304 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1305 | ensure that we don't dead code strip them and keep such | |
1306 | labels from another instantiation point until we can fix this | |
1307 | properly with group comdat support. */ | |
1308 | no_dead_strip (file, lab); | |
1309 | } | |
4746cf84 MA |
1310 | else |
1311 | fprintf (file, "%s:\n", lab); | |
1312 | ||
1313 | free (lab); | |
1314 | } | |
1315 | ||
1316 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 1317 | |
4746cf84 MA |
1318 | void |
1319 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1320 | { | |
4746cf84 MA |
1321 | const char *nlp_name; |
1322 | ||
992d08b1 | 1323 | gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
4746cf84 | 1324 | |
11abc112 | 1325 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
1326 | fputs ("\t.long\t", file); |
1327 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1328 | fputs ("-.", file); | |
1329 | } | |
1330 | ||
6ce4806b MA |
1331 | /* Emit an assembler directive to set visibility for a symbol. The |
1332 | only supported visibilities are VISIBILITY_DEFAULT and | |
1333 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1334 | extern". There is no MACH-O equivalent of ELF's | |
1335 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1336 | ||
1337 | void | |
1338 | darwin_assemble_visibility (tree decl, int vis) | |
1339 | { | |
1340 | if (vis == VISIBILITY_DEFAULT) | |
1341 | ; | |
1342 | else if (vis == VISIBILITY_HIDDEN) | |
1343 | { | |
1344 | fputs ("\t.private_extern ", asm_out_file); | |
1345 | assemble_name (asm_out_file, | |
1346 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1347 | fputs ("\n", asm_out_file); | |
1348 | } | |
1349 | else | |
5c498b10 DD |
1350 | warning (OPT_Wattributes, "internal and protected visibility attributes " |
1351 | "not supported in this configuration; ignored"); | |
6ce4806b MA |
1352 | } |
1353 | ||
7606e68f SS |
1354 | /* Output a difference of two labels that will be an assembly time |
1355 | constant if the two labels are local. (.long lab1-lab2 will be | |
1356 | very different if lab1 is at the boundary between two sections; it | |
1357 | will be relocated according to the second section, not the first, | |
1358 | so one ends up with a difference between labels in different | |
1359 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1360 | ||
1361 | static int darwin_dwarf_label_counter; | |
1362 | ||
1363 | void | |
59d8fe27 | 1364 | darwin_asm_output_dwarf_delta (FILE *file, int size, |
9c808aad | 1365 | const char *lab1, const char *lab2) |
7606e68f | 1366 | { |
4746cf84 MA |
1367 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1368 | && lab2[0] == '*' && lab2[1] == 'L'); | |
d4b56511 | 1369 | const char *directive = (size == 8 ? ".quad" : ".long"); |
7606e68f SS |
1370 | |
1371 | if (islocaldiff) | |
1372 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1373 | else | |
59d8fe27 | 1374 | fprintf (file, "\t%s\t", directive); |
57829bc4 | 1375 | assemble_name_raw (file, lab1); |
7606e68f | 1376 | fprintf (file, "-"); |
57829bc4 | 1377 | assemble_name_raw (file, lab2); |
7606e68f | 1378 | if (islocaldiff) |
59d8fe27 | 1379 | fprintf (file, "\n\t%s L$set$%d", directive, darwin_dwarf_label_counter++); |
7606e68f SS |
1380 | } |
1381 | ||
a5fe455b | 1382 | void |
9c808aad | 1383 | darwin_file_end (void) |
a5fe455b ZW |
1384 | { |
1385 | machopic_finish (asm_out_file); | |
1386 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1387 | { | |
1388 | constructor_section (); | |
1389 | destructor_section (); | |
1390 | ASM_OUTPUT_ALIGN (asm_out_file, 1); | |
1391 | } | |
92b9a671 | 1392 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
a5fe455b ZW |
1393 | } |
1394 | ||
31920d83 DJ |
1395 | /* Cross-module name binding. Darwin does not support overriding |
1396 | functions at dynamic-link time. */ | |
1397 | ||
1398 | bool | |
1399 | darwin_binds_local_p (tree decl) | |
1400 | { | |
1401 | return default_binds_local_p_1 (decl, 0); | |
1402 | } | |
1403 | ||
e2500fed | 1404 | #include "gt-darwin.h" |