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ee890fe2 | 1 | /* Functions for generic Darwin as target machine for GNU C compiler. |
0ea5865c | 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 2000, 2001, 2002, 2003, 2004 |
ee890fe2 SS |
3 | Free Software Foundation, Inc. |
4 | Contributed by Apple Computer Inc. | |
5 | ||
7ec022b2 | 6 | This file is part of GCC. |
ee890fe2 | 7 | |
7ec022b2 | 8 | GCC is free software; you can redistribute it and/or modify |
ee890fe2 SS |
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 | ||
7ec022b2 | 13 | GCC is distributed in the hope that it will be useful, |
ee890fe2 SS |
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 | |
7ec022b2 | 19 | along with GCC; see the file COPYING. If not, write to |
ee890fe2 SS |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "config.h" | |
24 | #include "system.h" | |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
ee890fe2 SS |
27 | #include "rtl.h" |
28 | #include "regs.h" | |
29 | #include "hard-reg-set.h" | |
30 | #include "real.h" | |
31 | #include "insn-config.h" | |
32 | #include "conditions.h" | |
33 | #include "insn-flags.h" | |
34 | #include "output.h" | |
35 | #include "insn-attr.h" | |
36 | #include "flags.h" | |
37 | #include "tree.h" | |
38 | #include "expr.h" | |
39 | #include "reload.h" | |
ee890fe2 SS |
40 | #include "function.h" |
41 | #include "ggc.h" | |
3ac88239 | 42 | #include "langhooks.h" |
1adaa117 | 43 | #include "target.h" |
245ff137 | 44 | #include "tm_p.h" |
6ce4806b | 45 | #include "errors.h" |
11abc112 | 46 | #include "hashtab.h" |
ee890fe2 | 47 | |
699c914a MS |
48 | /* Darwin supports a feature called fix-and-continue, which is used |
49 | for rapid turn around debugging. When code is compiled with the | |
50 | -mfix-and-continue flag, two changes are made to the generated code | |
51 | that allow the system to do things that it would normally not be | |
52 | able to do easily. These changes allow gdb to load in | |
53 | recompilation of a translation unit that has been changed into a | |
54 | running program and replace existing functions and methods of that | |
55 | translation unit with with versions of those functions and methods | |
56 | from the newly compiled translation unit. The new functions access | |
57 | the existing static data from the old translation unit, if the data | |
58 | existed in the unit to be replaced, and from the new translation | |
59 | unit, for new data. | |
60 | ||
61 | The changes are to insert 4 nops at the beginning of all functions | |
62 | and to use indirection to get at static duration data. The 4 nops | |
63 | are required by consumers of the generated code. Currently, gdb | |
64 | uses this to patch in a jump to the overriding function, this | |
65 | allows all uses of the old name to forward to the replacement, | |
c112cf2b | 66 | including existing function pointers and virtual methods. See |
699c914a MS |
67 | rs6000_emit_prologue for the code that handles the nop insertions. |
68 | ||
69 | The added indirection allows gdb to redirect accesses to static | |
70 | duration data from the newly loaded translation unit to the | |
71 | existing data, if any. @code{static} data is special and is | |
72 | handled by setting the second word in the .non_lazy_symbol_pointer | |
73 | data structure to the address of the data. See indirect_data for | |
74 | the code that handles the extra indirection, and | |
75 | machopic_output_indirection and its use of MACHO_SYMBOL_STATIC for | |
76 | the code that handles @code{static} data indirection. */ | |
77 | ||
78 | ||
8f4220dc MA |
79 | /* Nonzero if the user passes the -mone-byte-bool switch, which forces |
80 | sizeof(bool) to be 1. */ | |
81 | const char *darwin_one_byte_bool = 0; | |
82 | ||
ee890fe2 | 83 | int |
9c808aad | 84 | name_needs_quotes (const char *name) |
ee890fe2 SS |
85 | { |
86 | int c; | |
87 | while ((c = *name++) != '\0') | |
6f94a68e | 88 | if (! ISIDNUM (c) && c != '.' && c != '$') |
ee890fe2 SS |
89 | return 1; |
90 | return 0; | |
91 | } | |
92 | ||
16515e5c | 93 | /* Return true if SYM_REF can be used without an indirection. */ |
11abc112 MM |
94 | static int |
95 | machopic_symbol_defined_p (rtx sym_ref) | |
ee890fe2 | 96 | { |
16515e5c AP |
97 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_DEFINED) |
98 | return true; | |
99 | ||
100 | /* If a symbol references local and is not an extern to this | |
101 | file, then the symbol might be able to declared as defined. */ | |
102 | if (SYMBOL_REF_LOCAL_P (sym_ref) && ! SYMBOL_REF_EXTERNAL_P (sym_ref)) | |
103 | { | |
104 | /* If the symbol references a variable and the variable is a | |
105 | common symbol, then this symbol is not defined. */ | |
106 | if (SYMBOL_REF_FLAGS (sym_ref) & MACHO_SYMBOL_FLAG_VARIABLE) | |
107 | { | |
108 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
109 | if (!decl) | |
110 | return true; | |
111 | if (DECL_COMMON (decl)) | |
112 | return false; | |
113 | } | |
114 | return true; | |
115 | } | |
116 | return false; | |
ee890fe2 SS |
117 | } |
118 | ||
11abc112 MM |
119 | /* This module assumes that (const (symbol_ref "foo")) is a legal pic |
120 | reference, which will not be changed. */ | |
9c808aad | 121 | |
ee890fe2 | 122 | enum machopic_addr_class |
11abc112 | 123 | machopic_classify_symbol (rtx sym_ref) |
ee890fe2 | 124 | { |
11abc112 MM |
125 | int flags; |
126 | bool function_p; | |
127 | ||
128 | flags = SYMBOL_REF_FLAGS (sym_ref); | |
129 | function_p = SYMBOL_REF_FUNCTION_P (sym_ref); | |
130 | if (machopic_symbol_defined_p (sym_ref)) | |
131 | return (function_p | |
132 | ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); | |
133 | else | |
134 | return (function_p | |
135 | ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); | |
ee890fe2 SS |
136 | } |
137 | ||
699c914a MS |
138 | #ifndef TARGET_FIX_AND_CONTINUE |
139 | #define TARGET_FIX_AND_CONTINUE 0 | |
140 | #endif | |
141 | ||
142 | /* Indicate when fix-and-continue style code generation is being used | |
143 | and when a reference to data should be indirected so that it can be | |
144 | rebound in a new translation unit to refernce the original instance | |
145 | of that data. Symbol names that are for code generation local to | |
146 | the translation unit are bound to the new translation unit; | |
147 | currently this means symbols that begin with L or _OBJC_; | |
148 | otherwise, we indicate that an indirect reference should be made to | |
149 | permit the runtime to rebind new instances of the translation unit | |
150 | to the original instance of the data. */ | |
151 | ||
152 | static int | |
153 | indirect_data (rtx sym_ref) | |
154 | { | |
155 | int lprefix; | |
156 | const char *name; | |
157 | ||
158 | /* If we aren't generating fix-and-continue code, don't do anything special. */ | |
159 | if (TARGET_FIX_AND_CONTINUE == 0) | |
160 | return 0; | |
161 | ||
162 | /* Otherwise, all symbol except symbols that begin with L or _OBJC_ | |
163 | are indirected. Symbols that begin with L and _OBJC_ are always | |
164 | bound to the current translation unit as they are used for | |
165 | generated local data of the translation unit. */ | |
166 | ||
167 | name = XSTR (sym_ref, 0); | |
168 | ||
169 | lprefix = (((name[0] == '*' || name[0] == '&') | |
170 | && (name[1] == 'L' || (name[1] == '"' && name[2] == 'L'))) | |
171 | || (strncmp (name, "_OBJC_", 6))); | |
172 | ||
173 | return ! lprefix; | |
174 | } | |
175 | ||
176 | ||
ee890fe2 | 177 | static int |
11abc112 | 178 | machopic_data_defined_p (rtx sym_ref) |
ee890fe2 | 179 | { |
699c914a MS |
180 | if (indirect_data (sym_ref)) |
181 | return 0; | |
182 | ||
11abc112 | 183 | switch (machopic_classify_symbol (sym_ref)) |
ee890fe2 SS |
184 | { |
185 | case MACHOPIC_DEFINED_DATA: | |
0e1ad529 | 186 | case MACHOPIC_DEFINED_FUNCTION: |
ee890fe2 SS |
187 | return 1; |
188 | default: | |
189 | return 0; | |
190 | } | |
191 | } | |
192 | ||
ee890fe2 | 193 | void |
11abc112 | 194 | machopic_define_symbol (rtx mem) |
ee890fe2 | 195 | { |
11abc112 MM |
196 | rtx sym_ref; |
197 | if (GET_CODE (mem) != MEM) | |
198 | abort (); | |
199 | sym_ref = XEXP (mem, 0); | |
200 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; | |
ee890fe2 SS |
201 | } |
202 | ||
6788f5ca | 203 | static GTY(()) char * function_base; |
ee890fe2 | 204 | |
92c1a778 | 205 | const char * |
9c808aad | 206 | machopic_function_base_name (void) |
ee890fe2 | 207 | { |
ab82a49f AP |
208 | /* if dynamic-no-pic is on, we should not get here */ |
209 | if (MACHO_DYNAMIC_NO_PIC_P) | |
210 | abort (); | |
ee890fe2 | 211 | |
1622229c | 212 | if (function_base == NULL) |
9c808aad | 213 | function_base = |
1622229c AP |
214 | (char *) ggc_alloc_string ("<pic base>", sizeof ("<pic base>")); |
215 | ||
216 | current_function_uses_pic_offset_table = 1; | |
217 | ||
218 | return function_base; | |
219 | } | |
220 | ||
11abc112 MM |
221 | /* Return a SYMBOL_REF for the PIC function base. */ |
222 | ||
223 | rtx | |
224 | machopic_function_base_sym (void) | |
225 | { | |
226 | rtx sym_ref; | |
227 | ||
228 | sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); | |
229 | SYMBOL_REF_FLAGS (sym_ref) | |
230 | |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); | |
231 | return sym_ref; | |
232 | } | |
233 | ||
1622229c AP |
234 | static GTY(()) const char * function_base_func_name; |
235 | static GTY(()) int current_pic_label_num; | |
236 | ||
237 | void | |
238 | machopic_output_function_base_name (FILE *file) | |
239 | { | |
240 | const char *current_name; | |
241 | ||
ff482c8d | 242 | /* If dynamic-no-pic is on, we should not get here. */ |
1622229c AP |
243 | if (MACHO_DYNAMIC_NO_PIC_P) |
244 | abort (); | |
9c808aad | 245 | current_name = |
1622229c | 246 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)); |
6788f5ca | 247 | if (function_base_func_name != current_name) |
ee890fe2 | 248 | { |
ee890fe2 | 249 | ++current_pic_label_num; |
6788f5ca | 250 | function_base_func_name = current_name; |
ee890fe2 | 251 | } |
1622229c | 252 | fprintf (file, "\"L%011d$pb\"", current_pic_label_num); |
ee890fe2 SS |
253 | } |
254 | ||
11abc112 MM |
255 | /* The suffix attached to non-lazy pointer symbols. */ |
256 | #define NON_LAZY_POINTER_SUFFIX "$non_lazy_ptr" | |
257 | /* The suffix attached to stub symbols. */ | |
258 | #define STUB_SUFFIX "$stub" | |
ee890fe2 | 259 | |
11abc112 | 260 | typedef struct machopic_indirection GTY (()) |
ee890fe2 | 261 | { |
11abc112 MM |
262 | /* The SYMBOL_REF for the entity referenced. */ |
263 | rtx symbol; | |
1adaa117 GK |
264 | /* The name of the stub or non-lazy pointer. */ |
265 | const char * ptr_name; | |
11abc112 MM |
266 | /* True iff this entry is for a stub (as opposed to a non-lazy |
267 | pointer). */ | |
268 | bool stub_p; | |
269 | /* True iff this stub or pointer pointer has been referenced. */ | |
270 | bool used; | |
271 | } machopic_indirection; | |
272 | ||
273 | /* A table mapping stub names and non-lazy pointer names to | |
274 | SYMBOL_REFs for the stubbed-to and pointed-to entities. */ | |
275 | ||
276 | static GTY ((param_is (struct machopic_indirection))) htab_t | |
277 | machopic_indirections; | |
278 | ||
279 | /* Return a hash value for a SLOT in the indirections hash table. */ | |
280 | ||
281 | static hashval_t | |
282 | machopic_indirection_hash (const void *slot) | |
283 | { | |
284 | const machopic_indirection *p = (const machopic_indirection *) slot; | |
1adaa117 | 285 | return htab_hash_string (p->ptr_name); |
11abc112 | 286 | } |
9c808aad | 287 | |
11abc112 MM |
288 | /* Returns true if the KEY is the same as that associated with |
289 | SLOT. */ | |
290 | ||
291 | static int | |
292 | machopic_indirection_eq (const void *slot, const void *key) | |
293 | { | |
1adaa117 | 294 | return strcmp (((const machopic_indirection *) slot)->ptr_name, key) == 0; |
11abc112 | 295 | } |
ee890fe2 | 296 | |
11abc112 MM |
297 | /* Return the name of the non-lazy pointer (if STUB_P is false) or |
298 | stub (if STUB_B is true) corresponding to the given name. */ | |
df56a27f | 299 | |
11abc112 MM |
300 | const char * |
301 | machopic_indirection_name (rtx sym_ref, bool stub_p) | |
302 | { | |
303 | char *buffer; | |
304 | const char *name = XSTR (sym_ref, 0); | |
1adaa117 | 305 | size_t namelen = strlen (name); |
11abc112 | 306 | machopic_indirection *p; |
1adaa117 | 307 | void ** slot; |
11abc112 MM |
308 | |
309 | /* Construct the name of the non-lazy pointer or stub. */ | |
310 | if (stub_p) | |
df56a27f | 311 | { |
11abc112 MM |
312 | int needs_quotes = name_needs_quotes (name); |
313 | buffer = alloca (strlen ("&L") | |
314 | + namelen | |
315 | + strlen (STUB_SUFFIX) | |
316 | + 2 /* possible quotes */ | |
317 | + 1 /* '\0' */); | |
318 | ||
319 | if (needs_quotes) | |
df56a27f | 320 | { |
11abc112 MM |
321 | if (name[0] == '*') |
322 | sprintf (buffer, "&\"L%s" STUB_SUFFIX "\"", name + 1); | |
323 | else | |
324 | sprintf (buffer, "&\"L%s%s" STUB_SUFFIX "\"", user_label_prefix, | |
325 | name); | |
df56a27f | 326 | } |
11abc112 MM |
327 | else if (name[0] == '*') |
328 | sprintf (buffer, "&L%s" STUB_SUFFIX, name + 1); | |
329 | else | |
330 | sprintf (buffer, "&L%s%s" STUB_SUFFIX, user_label_prefix, name); | |
331 | } | |
332 | else | |
333 | { | |
334 | buffer = alloca (strlen ("&L") | |
335 | + strlen (user_label_prefix) | |
336 | + namelen | |
337 | + strlen (NON_LAZY_POINTER_SUFFIX) | |
338 | + 1 /* '\0' */); | |
339 | if (name[0] == '*') | |
340 | sprintf (buffer, "&L%s" NON_LAZY_POINTER_SUFFIX, name + 1); | |
341 | else | |
342 | sprintf (buffer, "&L%s%s" NON_LAZY_POINTER_SUFFIX, | |
343 | user_label_prefix, name); | |
df56a27f SS |
344 | } |
345 | ||
1adaa117 GK |
346 | if (!machopic_indirections) |
347 | machopic_indirections = htab_create_ggc (37, | |
348 | machopic_indirection_hash, | |
349 | machopic_indirection_eq, | |
350 | /*htab_del=*/NULL); | |
351 | ||
352 | slot = htab_find_slot_with_hash (machopic_indirections, buffer, | |
353 | htab_hash_string (buffer), INSERT); | |
354 | if (*slot) | |
355 | { | |
356 | p = (machopic_indirection *) *slot; | |
357 | } | |
358 | else | |
11abc112 | 359 | { |
11abc112 MM |
360 | p = (machopic_indirection *) ggc_alloc (sizeof (machopic_indirection)); |
361 | p->symbol = sym_ref; | |
1adaa117 | 362 | p->ptr_name = xstrdup (buffer); |
11abc112 | 363 | p->stub_p = stub_p; |
1adaa117 GK |
364 | p->used = false; |
365 | *slot = p; | |
11abc112 MM |
366 | } |
367 | ||
1adaa117 | 368 | return p->ptr_name; |
ee890fe2 SS |
369 | } |
370 | ||
11abc112 | 371 | /* Return the name of the stub for the mcount function. */ |
ee890fe2 | 372 | |
11abc112 MM |
373 | const char* |
374 | machopic_mcount_stub_name (void) | |
ee890fe2 | 375 | { |
76f60aa5 AP |
376 | rtx symbol = gen_rtx_SYMBOL_REF (Pmode, "*mcount"); |
377 | return machopic_indirection_name (symbol, /*stub_p=*/true); | |
ee890fe2 SS |
378 | } |
379 | ||
11abc112 MM |
380 | /* If NAME is the name of a stub or a non-lazy pointer , mark the stub |
381 | or non-lazy pointer as used -- and mark the object to which the | |
382 | pointer/stub refers as used as well, since the pointer/stub will | |
383 | emit a reference to it. */ | |
384 | ||
ee890fe2 | 385 | void |
11abc112 | 386 | machopic_validate_stub_or_non_lazy_ptr (const char *name) |
ee890fe2 | 387 | { |
11abc112 MM |
388 | machopic_indirection *p; |
389 | ||
390 | p = ((machopic_indirection *) | |
1adaa117 GK |
391 | (htab_find_with_hash (machopic_indirections, name, |
392 | htab_hash_string (name)))); | |
393 | if (p && ! p->used) | |
11abc112 | 394 | { |
1adaa117 GK |
395 | const char *real_name; |
396 | tree id; | |
397 | ||
398 | p->used = true; | |
399 | ||
ca472546 GK |
400 | /* Do what output_addr_const will do when we actually call it. */ |
401 | if (SYMBOL_REF_DECL (p->symbol)) | |
402 | mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); | |
403 | ||
404 | real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); | |
1adaa117 GK |
405 | |
406 | id = maybe_get_identifier (real_name); | |
407 | if (id) | |
408 | mark_referenced (id); | |
11abc112 | 409 | } |
ee890fe2 SS |
410 | } |
411 | ||
412 | /* Transform ORIG, which may be any data source, to the corresponding | |
413 | source using indirections. */ | |
414 | ||
415 | rtx | |
9c808aad | 416 | machopic_indirect_data_reference (rtx orig, rtx reg) |
ee890fe2 SS |
417 | { |
418 | rtx ptr_ref = orig; | |
9c808aad | 419 | |
ee890fe2 SS |
420 | if (! MACHOPIC_INDIRECT) |
421 | return orig; | |
422 | ||
423 | if (GET_CODE (orig) == SYMBOL_REF) | |
424 | { | |
11abc112 | 425 | int defined = machopic_data_defined_p (orig); |
ab82a49f AP |
426 | |
427 | if (defined && MACHO_DYNAMIC_NO_PIC_P) | |
428 | { | |
429 | #if defined (TARGET_TOC) | |
b8a55285 AP |
430 | emit_insn (gen_macho_high (reg, orig)); |
431 | emit_insn (gen_macho_low (reg, reg, orig)); | |
ab82a49f AP |
432 | #else |
433 | /* some other cpu -- writeme! */ | |
434 | abort (); | |
435 | #endif | |
436 | return reg; | |
437 | } | |
438 | else if (defined) | |
ee890fe2 | 439 | { |
7ae8cf75 | 440 | #if defined (TARGET_TOC) || defined (HAVE_lo_sum) |
11abc112 | 441 | rtx pic_base = machopic_function_base_sym (); |
6f94a68e GK |
442 | rtx offset = gen_rtx_CONST (Pmode, |
443 | gen_rtx_MINUS (Pmode, orig, pic_base)); | |
7ae8cf75 | 444 | #endif |
ee890fe2 SS |
445 | |
446 | #if defined (TARGET_TOC) /* i.e., PowerPC */ | |
d9b46dfb | 447 | rtx hi_sum_reg = (no_new_pseudos ? reg : gen_reg_rtx (Pmode)); |
ee890fe2 SS |
448 | |
449 | if (reg == NULL) | |
450 | abort (); | |
451 | ||
6f94a68e GK |
452 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
453 | gen_rtx_PLUS (Pmode, pic_offset_table_rtx, | |
454 | gen_rtx_HIGH (Pmode, offset)))); | |
455 | emit_insn (gen_rtx_SET (Pmode, reg, | |
456 | gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset))); | |
ee890fe2 SS |
457 | |
458 | orig = reg; | |
459 | #else | |
460 | #if defined (HAVE_lo_sum) | |
461 | if (reg == 0) abort (); | |
462 | ||
6f94a68e GK |
463 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
464 | gen_rtx_HIGH (Pmode, offset))); | |
465 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
466 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
467 | emit_insn (gen_rtx_USE (VOIDmode, pic_offset_table_rtx)); | |
ee890fe2 | 468 | |
6f94a68e | 469 | orig = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, reg); |
ee890fe2 SS |
470 | #endif |
471 | #endif | |
472 | return orig; | |
473 | } | |
474 | ||
828a4fe4 | 475 | ptr_ref = (gen_rtx_SYMBOL_REF |
11abc112 MM |
476 | (Pmode, |
477 | machopic_indirection_name (orig, /*stub_p=*/false))); | |
ee890fe2 | 478 | |
542a8afa | 479 | SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); |
c0d594f1 | 480 | |
542a8afa | 481 | ptr_ref = gen_const_mem (Pmode, ptr_ref); |
828a4fe4 | 482 | machopic_define_symbol (ptr_ref); |
ee890fe2 SS |
483 | |
484 | return ptr_ref; | |
485 | } | |
486 | else if (GET_CODE (orig) == CONST) | |
487 | { | |
488 | rtx base, result; | |
489 | ||
490 | /* legitimize both operands of the PLUS */ | |
491 | if (GET_CODE (XEXP (orig, 0)) == PLUS) | |
492 | { | |
493 | base = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 0), | |
494 | reg); | |
495 | orig = machopic_indirect_data_reference (XEXP (XEXP (orig, 0), 1), | |
496 | (base == reg ? 0 : reg)); | |
497 | } | |
9c808aad | 498 | else |
ee890fe2 SS |
499 | return orig; |
500 | ||
501 | if (MACHOPIC_PURE && GET_CODE (orig) == CONST_INT) | |
ed8908e7 | 502 | result = plus_constant (base, INTVAL (orig)); |
ee890fe2 | 503 | else |
6f94a68e | 504 | result = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 505 | |
ee890fe2 SS |
506 | if (MACHOPIC_JUST_INDIRECT && GET_CODE (base) == MEM) |
507 | { | |
508 | if (reg) | |
509 | { | |
510 | emit_move_insn (reg, result); | |
511 | result = reg; | |
512 | } | |
513 | else | |
514 | { | |
515 | result = force_reg (GET_MODE (result), result); | |
516 | } | |
517 | } | |
518 | ||
519 | return result; | |
520 | ||
521 | } | |
522 | else if (GET_CODE (orig) == MEM) | |
523 | XEXP (ptr_ref, 0) = machopic_indirect_data_reference (XEXP (orig, 0), reg); | |
524 | /* When the target is i386, this code prevents crashes due to the | |
525 | compiler's ignorance on how to move the PIC base register to | |
526 | other registers. (The reload phase sometimes introduces such | |
527 | insns.) */ | |
528 | else if (GET_CODE (orig) == PLUS | |
529 | && GET_CODE (XEXP (orig, 0)) == REG | |
530 | && REGNO (XEXP (orig, 0)) == PIC_OFFSET_TABLE_REGNUM | |
531 | #ifdef I386 | |
532 | /* Prevent the same register from being erroneously used | |
533 | as both the base and index registers. */ | |
534 | && GET_CODE (XEXP (orig, 1)) == CONST | |
535 | #endif | |
536 | && reg) | |
537 | { | |
538 | emit_move_insn (reg, XEXP (orig, 0)); | |
539 | XEXP (ptr_ref, 0) = reg; | |
540 | } | |
541 | return ptr_ref; | |
542 | } | |
543 | ||
ee890fe2 SS |
544 | /* Transform TARGET (a MEM), which is a function call target, to the |
545 | corresponding symbol_stub if necessary. Return a new MEM. */ | |
546 | ||
547 | rtx | |
9c808aad | 548 | machopic_indirect_call_target (rtx target) |
ee890fe2 SS |
549 | { |
550 | if (GET_CODE (target) != MEM) | |
551 | return target; | |
552 | ||
11abc112 MM |
553 | if (MACHOPIC_INDIRECT |
554 | && GET_CODE (XEXP (target, 0)) == SYMBOL_REF | |
555 | && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) | |
556 | & MACHO_SYMBOL_FLAG_DEFINED)) | |
9c808aad | 557 | { |
11abc112 MM |
558 | rtx sym_ref = XEXP (target, 0); |
559 | const char *stub_name = machopic_indirection_name (sym_ref, | |
560 | /*stub_p=*/true); | |
561 | enum machine_mode mode = GET_MODE (sym_ref); | |
562 | tree decl = SYMBOL_REF_DECL (sym_ref); | |
563 | ||
564 | XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); | |
565 | SYMBOL_REF_DECL (XEXP (target, 0)) = decl; | |
389fdba0 | 566 | MEM_READONLY_P (target) = 1; |
542a8afa | 567 | MEM_NOTRAP_P (target) = 1; |
ee890fe2 SS |
568 | } |
569 | ||
570 | return target; | |
571 | } | |
572 | ||
573 | rtx | |
9c808aad | 574 | machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) |
ee890fe2 SS |
575 | { |
576 | rtx pic_ref = orig; | |
577 | ||
ab82a49f | 578 | if (! MACHOPIC_INDIRECT) |
ee890fe2 SS |
579 | return orig; |
580 | ||
581 | /* First handle a simple SYMBOL_REF or LABEL_REF */ | |
582 | if (GET_CODE (orig) == LABEL_REF | |
583 | || (GET_CODE (orig) == SYMBOL_REF | |
584 | )) | |
585 | { | |
586 | /* addr(foo) = &func+(foo-func) */ | |
587 | rtx pic_base; | |
588 | ||
589 | orig = machopic_indirect_data_reference (orig, reg); | |
590 | ||
9c808aad | 591 | if (GET_CODE (orig) == PLUS |
ee890fe2 SS |
592 | && GET_CODE (XEXP (orig, 0)) == REG) |
593 | { | |
594 | if (reg == 0) | |
595 | return force_reg (mode, orig); | |
596 | ||
597 | emit_move_insn (reg, orig); | |
598 | return reg; | |
9c808aad | 599 | } |
ee890fe2 | 600 | |
ab82a49f AP |
601 | /* if dynamic-no-pic then use 0 as the pic base */ |
602 | if (MACHO_DYNAMIC_NO_PIC_P) | |
603 | pic_base = CONST0_RTX (Pmode); | |
604 | else | |
11abc112 | 605 | pic_base = machopic_function_base_sym (); |
ee890fe2 SS |
606 | |
607 | if (GET_CODE (orig) == MEM) | |
608 | { | |
609 | if (reg == 0) | |
610 | { | |
611 | if (reload_in_progress) | |
612 | abort (); | |
613 | else | |
614 | reg = gen_reg_rtx (Pmode); | |
615 | } | |
9c808aad | 616 | |
ee890fe2 | 617 | #ifdef HAVE_lo_sum |
ab82a49f AP |
618 | if (MACHO_DYNAMIC_NO_PIC_P |
619 | && (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
620 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF)) | |
621 | { | |
622 | #if defined (TARGET_TOC) /* ppc */ | |
623 | rtx temp_reg = (no_new_pseudos) ? reg : gen_reg_rtx (Pmode); | |
624 | rtx asym = XEXP (orig, 0); | |
625 | rtx mem; | |
626 | ||
b8a55285 | 627 | emit_insn (gen_macho_high (temp_reg, asym)); |
542a8afa RH |
628 | mem = gen_const_mem (GET_MODE (orig), |
629 | gen_rtx_LO_SUM (Pmode, temp_reg, asym)); | |
6f94a68e | 630 | emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
ab82a49f AP |
631 | #else |
632 | /* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */ | |
633 | abort (); | |
634 | #endif | |
635 | pic_ref = reg; | |
636 | } | |
637 | else | |
9c808aad | 638 | if (GET_CODE (XEXP (orig, 0)) == SYMBOL_REF |
ee890fe2 SS |
639 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) |
640 | { | |
6f94a68e GK |
641 | rtx offset = gen_rtx_CONST (Pmode, |
642 | gen_rtx_MINUS (Pmode, | |
643 | XEXP (orig, 0), | |
644 | pic_base)); | |
ee890fe2 SS |
645 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
646 | /* Generating a new reg may expose opportunities for | |
647 | common subexpression elimination. */ | |
49bd1d27 | 648 | rtx hi_sum_reg = no_new_pseudos ? reg : gen_reg_rtx (Pmode); |
6f94a68e GK |
649 | rtx mem; |
650 | rtx insn; | |
651 | rtx sum; | |
652 | ||
653 | sum = gen_rtx_HIGH (Pmode, offset); | |
654 | if (! MACHO_DYNAMIC_NO_PIC_P) | |
655 | sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); | |
ee890fe2 | 656 | |
6f94a68e GK |
657 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); |
658 | ||
542a8afa RH |
659 | mem = gen_const_mem (GET_MODE (orig), |
660 | gen_rtx_LO_SUM (Pmode, | |
661 | hi_sum_reg, offset)); | |
6f94a68e GK |
662 | insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); |
663 | REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, | |
664 | REG_NOTES (insn)); | |
665 | ||
666 | pic_ref = reg; | |
ee890fe2 | 667 | #else |
6f94a68e GK |
668 | emit_insn (gen_rtx_USE (VOIDmode, |
669 | gen_rtx_REG (Pmode, | |
670 | PIC_OFFSET_TABLE_REGNUM))); | |
671 | ||
672 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
673 | gen_rtx_HIGH (Pmode, | |
674 | gen_rtx_CONST (Pmode, | |
675 | offset)))); | |
676 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
677 | gen_rtx_LO_SUM (Pmode, reg, | |
678 | gen_rtx_CONST (Pmode, offset)))); | |
679 | pic_ref = gen_rtx_PLUS (Pmode, | |
680 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
681 | #endif |
682 | } | |
683 | else | |
684 | #endif /* HAVE_lo_sum */ | |
685 | { | |
686 | rtx pic = pic_offset_table_rtx; | |
687 | if (GET_CODE (pic) != REG) | |
688 | { | |
689 | emit_move_insn (reg, pic); | |
690 | pic = reg; | |
691 | } | |
692 | #if 0 | |
6f94a68e GK |
693 | emit_insn (gen_rtx_USE (VOIDmode, |
694 | gen_rtx_REG (Pmode, | |
695 | PIC_OFFSET_TABLE_REGNUM))); | |
ee890fe2 SS |
696 | #endif |
697 | ||
6f94a68e GK |
698 | pic_ref = gen_rtx_PLUS (Pmode, |
699 | pic, | |
700 | gen_rtx_CONST (Pmode, | |
701 | gen_rtx_MINUS (Pmode, | |
702 | XEXP (orig, 0), | |
703 | pic_base))); | |
ee890fe2 | 704 | } |
9c808aad | 705 | |
ee890fe2 | 706 | #if !defined (TARGET_TOC) |
ee890fe2 | 707 | emit_move_insn (reg, pic_ref); |
542a8afa | 708 | pic_ref = gen_const_mem (GET_MODE (orig), reg); |
f9b0ac3b | 709 | #endif |
ee890fe2 SS |
710 | } |
711 | else | |
712 | { | |
713 | ||
714 | #ifdef HAVE_lo_sum | |
9c808aad | 715 | if (GET_CODE (orig) == SYMBOL_REF |
ee890fe2 SS |
716 | || GET_CODE (orig) == LABEL_REF) |
717 | { | |
6f94a68e GK |
718 | rtx offset = gen_rtx_CONST (Pmode, |
719 | gen_rtx_MINUS (Pmode, | |
720 | orig, pic_base)); | |
ee890fe2 SS |
721 | #if defined (TARGET_TOC) /* i.e., PowerPC */ |
722 | rtx hi_sum_reg; | |
723 | ||
724 | if (reg == 0) | |
725 | { | |
726 | if (reload_in_progress) | |
727 | abort (); | |
728 | else | |
49bd1d27 | 729 | reg = gen_reg_rtx (Pmode); |
ee890fe2 | 730 | } |
9c808aad | 731 | |
ee890fe2 SS |
732 | hi_sum_reg = reg; |
733 | ||
6f94a68e GK |
734 | emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, |
735 | (MACHO_DYNAMIC_NO_PIC_P) | |
736 | ? gen_rtx_HIGH (Pmode, offset) | |
737 | : gen_rtx_PLUS (Pmode, | |
738 | pic_offset_table_rtx, | |
739 | gen_rtx_HIGH (Pmode, | |
740 | offset)))); | |
741 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
742 | gen_rtx_LO_SUM (Pmode, | |
743 | hi_sum_reg, offset))); | |
ee890fe2 SS |
744 | pic_ref = reg; |
745 | #else | |
6f94a68e GK |
746 | emit_insn (gen_rtx_SET (VOIDmode, reg, |
747 | gen_rtx_HIGH (Pmode, offset))); | |
748 | emit_insn (gen_rtx_SET (VOIDmode, reg, | |
749 | gen_rtx_LO_SUM (Pmode, reg, offset))); | |
750 | pic_ref = gen_rtx_PLUS (Pmode, | |
751 | pic_offset_table_rtx, reg); | |
ee890fe2 SS |
752 | #endif |
753 | } | |
754 | else | |
755 | #endif /* HAVE_lo_sum */ | |
756 | { | |
757 | if (GET_CODE (orig) == REG) | |
758 | { | |
759 | return orig; | |
760 | } | |
761 | else | |
762 | { | |
763 | rtx pic = pic_offset_table_rtx; | |
764 | if (GET_CODE (pic) != REG) | |
765 | { | |
766 | emit_move_insn (reg, pic); | |
767 | pic = reg; | |
768 | } | |
769 | #if 0 | |
6f94a68e GK |
770 | emit_insn (gen_rtx_USE (VOIDmode, |
771 | pic_offset_table_rtx)); | |
ee890fe2 | 772 | #endif |
6f94a68e GK |
773 | pic_ref = gen_rtx_PLUS (Pmode, |
774 | pic, | |
775 | gen_rtx_CONST (Pmode, | |
776 | gen_rtx_MINUS (Pmode, | |
777 | orig, pic_base))); | |
ee890fe2 SS |
778 | } |
779 | } | |
780 | } | |
781 | ||
ee890fe2 SS |
782 | if (GET_CODE (pic_ref) != REG) |
783 | { | |
784 | if (reg != 0) | |
785 | { | |
786 | emit_move_insn (reg, pic_ref); | |
787 | return reg; | |
788 | } | |
789 | else | |
790 | { | |
791 | return force_reg (mode, pic_ref); | |
792 | } | |
793 | } | |
794 | else | |
795 | { | |
796 | return pic_ref; | |
797 | } | |
798 | } | |
799 | ||
800 | else if (GET_CODE (orig) == SYMBOL_REF) | |
801 | return orig; | |
802 | ||
803 | else if (GET_CODE (orig) == PLUS | |
804 | && (GET_CODE (XEXP (orig, 0)) == MEM | |
805 | || GET_CODE (XEXP (orig, 0)) == SYMBOL_REF | |
806 | || GET_CODE (XEXP (orig, 0)) == LABEL_REF) | |
807 | && XEXP (orig, 0) != pic_offset_table_rtx | |
808 | && GET_CODE (XEXP (orig, 1)) != REG) | |
9c808aad | 809 | |
ee890fe2 SS |
810 | { |
811 | rtx base; | |
812 | int is_complex = (GET_CODE (XEXP (orig, 0)) == MEM); | |
813 | ||
814 | base = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
815 | orig = machopic_legitimize_pic_address (XEXP (orig, 1), | |
816 | Pmode, (base == reg ? 0 : reg)); | |
817 | if (GET_CODE (orig) == CONST_INT) | |
818 | { | |
ed8908e7 | 819 | pic_ref = plus_constant (base, INTVAL (orig)); |
ee890fe2 SS |
820 | is_complex = 1; |
821 | } | |
822 | else | |
6f94a68e | 823 | pic_ref = gen_rtx_PLUS (Pmode, base, orig); |
ee890fe2 | 824 | |
ee890fe2 SS |
825 | if (reg && is_complex) |
826 | { | |
827 | emit_move_insn (reg, pic_ref); | |
828 | pic_ref = reg; | |
829 | } | |
830 | /* Likewise, should we set special REG_NOTEs here? */ | |
831 | } | |
832 | ||
833 | else if (GET_CODE (orig) == CONST) | |
834 | { | |
835 | return machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
836 | } | |
837 | ||
838 | else if (GET_CODE (orig) == MEM | |
839 | && GET_CODE (XEXP (orig, 0)) == SYMBOL_REF) | |
840 | { | |
841 | rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg); | |
389fdba0 | 842 | addr = replace_equiv_address (orig, addr); |
ee890fe2 SS |
843 | emit_move_insn (reg, addr); |
844 | pic_ref = reg; | |
845 | } | |
846 | ||
847 | return pic_ref; | |
848 | } | |
849 | ||
11abc112 MM |
850 | /* Output the stub or non-lazy pointer in *SLOT, if it has been used. |
851 | DATA is the FILE* for assembly output. Called from | |
852 | htab_traverse. */ | |
ee890fe2 | 853 | |
11abc112 MM |
854 | static int |
855 | machopic_output_indirection (void **slot, void *data) | |
ee890fe2 | 856 | { |
11abc112 MM |
857 | machopic_indirection *p = *((machopic_indirection **) slot); |
858 | FILE *asm_out_file = (FILE *) data; | |
859 | rtx symbol; | |
860 | const char *sym_name; | |
861 | const char *ptr_name; | |
862 | ||
863 | if (!p->used) | |
864 | return 1; | |
ee890fe2 | 865 | |
11abc112 MM |
866 | symbol = p->symbol; |
867 | sym_name = XSTR (symbol, 0); | |
1adaa117 | 868 | ptr_name = p->ptr_name; |
11abc112 MM |
869 | |
870 | if (p->stub_p) | |
ee890fe2 | 871 | { |
ee890fe2 SS |
872 | char *sym; |
873 | char *stub; | |
ee890fe2 | 874 | |
ee890fe2 SS |
875 | sym = alloca (strlen (sym_name) + 2); |
876 | if (sym_name[0] == '*' || sym_name[0] == '&') | |
877 | strcpy (sym, sym_name + 1); | |
878 | else if (sym_name[0] == '-' || sym_name[0] == '+') | |
9c808aad | 879 | strcpy (sym, sym_name); |
ee890fe2 | 880 | else |
789a4ea3 | 881 | sprintf (sym, "%s%s", user_label_prefix, sym_name); |
ee890fe2 | 882 | |
11abc112 MM |
883 | stub = alloca (strlen (ptr_name) + 2); |
884 | if (ptr_name[0] == '*' || ptr_name[0] == '&') | |
885 | strcpy (stub, ptr_name + 1); | |
ee890fe2 | 886 | else |
11abc112 | 887 | sprintf (stub, "%s%s", user_label_prefix, ptr_name); |
ee890fe2 | 888 | |
ca472546 | 889 | machopic_output_stub (asm_out_file, sym, stub); |
ee890fe2 | 890 | } |
699c914a | 891 | else if (! indirect_data (symbol) |
156a126c MS |
892 | && (machopic_symbol_defined_p (symbol) |
893 | || SYMBOL_REF_LOCAL_P (symbol))) | |
ee890fe2 | 894 | { |
11abc112 MM |
895 | data_section (); |
896 | assemble_align (GET_MODE_ALIGNMENT (Pmode)); | |
897 | assemble_label (ptr_name); | |
898 | assemble_integer (gen_rtx_SYMBOL_REF (Pmode, sym_name), | |
899 | GET_MODE_SIZE (Pmode), | |
900 | GET_MODE_ALIGNMENT (Pmode), 1); | |
ee890fe2 | 901 | } |
11abc112 MM |
902 | else |
903 | { | |
699c914a MS |
904 | rtx init = const0_rtx; |
905 | ||
11abc112 MM |
906 | machopic_nl_symbol_ptr_section (); |
907 | assemble_name (asm_out_file, ptr_name); | |
908 | fprintf (asm_out_file, ":\n"); | |
909 | ||
910 | fprintf (asm_out_file, "\t.indirect_symbol "); | |
911 | assemble_name (asm_out_file, sym_name); | |
912 | fprintf (asm_out_file, "\n"); | |
913 | ||
699c914a MS |
914 | /* Variables that are marked with MACHO_SYMBOL_STATIC need to |
915 | have their symbol name instead of 0 in the second entry of | |
916 | the non-lazy symbol pointer data structure when they are | |
917 | defined. This allows the runtime to rebind newer instances | |
918 | of the translation unit with the original instance of the | |
919 | data. */ | |
920 | ||
921 | if ((SYMBOL_REF_FLAGS (symbol) & MACHO_SYMBOL_STATIC) | |
922 | && machopic_symbol_defined_p (symbol)) | |
923 | init = gen_rtx_SYMBOL_REF (Pmode, sym_name); | |
924 | ||
925 | assemble_integer (init, GET_MODE_SIZE (Pmode), | |
11abc112 MM |
926 | GET_MODE_ALIGNMENT (Pmode), 1); |
927 | } | |
928 | ||
929 | return 1; | |
930 | } | |
931 | ||
932 | void | |
933 | machopic_finish (FILE *asm_out_file) | |
934 | { | |
935 | if (machopic_indirections) | |
699c914a | 936 | htab_traverse_noresize (machopic_indirections, |
11abc112 MM |
937 | machopic_output_indirection, |
938 | asm_out_file); | |
ee890fe2 SS |
939 | } |
940 | ||
9c808aad AJ |
941 | int |
942 | machopic_operand_p (rtx op) | |
ee890fe2 SS |
943 | { |
944 | if (MACHOPIC_JUST_INDIRECT) | |
945 | { | |
946 | while (GET_CODE (op) == CONST) | |
947 | op = XEXP (op, 0); | |
948 | ||
949 | if (GET_CODE (op) == SYMBOL_REF) | |
11abc112 | 950 | return machopic_symbol_defined_p (op); |
ee890fe2 SS |
951 | else |
952 | return 0; | |
953 | } | |
954 | ||
955 | while (GET_CODE (op) == CONST) | |
956 | op = XEXP (op, 0); | |
957 | ||
958 | if (GET_CODE (op) == MINUS | |
959 | && GET_CODE (XEXP (op, 0)) == SYMBOL_REF | |
960 | && GET_CODE (XEXP (op, 1)) == SYMBOL_REF | |
11abc112 MM |
961 | && machopic_symbol_defined_p (XEXP (op, 0)) |
962 | && machopic_symbol_defined_p (XEXP (op, 1))) | |
ee890fe2 SS |
963 | return 1; |
964 | ||
ee890fe2 SS |
965 | return 0; |
966 | } | |
df56a27f SS |
967 | |
968 | /* This function records whether a given name corresponds to a defined | |
969 | or undefined function or variable, for machopic_classify_ident to | |
970 | use later. */ | |
971 | ||
972 | void | |
9c808aad | 973 | darwin_encode_section_info (tree decl, rtx rtl, int first ATTRIBUTE_UNUSED) |
df56a27f | 974 | { |
353e51f8 | 975 | rtx sym_ref; |
df56a27f | 976 | |
e1a4211d SS |
977 | /* Do the standard encoding things first. */ |
978 | default_encode_section_info (decl, rtl, first); | |
979 | ||
11abc112 MM |
980 | if (TREE_CODE (decl) != FUNCTION_DECL && TREE_CODE (decl) != VAR_DECL) |
981 | return; | |
e1a4211d | 982 | |
11abc112 MM |
983 | sym_ref = XEXP (rtl, 0); |
984 | if (TREE_CODE (decl) == VAR_DECL) | |
985 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_VARIABLE; | |
986 | ||
987 | if (!DECL_EXTERNAL (decl) | |
f1a66265 | 988 | && (!TREE_PUBLIC (decl) || !DECL_WEAK (decl)) |
df56a27f SS |
989 | && ((TREE_STATIC (decl) |
990 | && (!DECL_COMMON (decl) || !TREE_PUBLIC (decl))) | |
bfbdca0b | 991 | || (!DECL_COMMON (decl) && DECL_INITIAL (decl) |
abe72dd8 | 992 | && DECL_INITIAL (decl) != error_mark_node))) |
11abc112 | 993 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; |
699c914a MS |
994 | |
995 | if (TREE_CODE (decl) == VAR_DECL | |
996 | && indirect_data (sym_ref) | |
997 | && ! TREE_PUBLIC (decl)) | |
998 | SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_STATIC; | |
4e08ba6c | 999 | } |
2cc07db4 | 1000 | |
8e3e233b DP |
1001 | void |
1002 | darwin_mark_decl_preserved (const char *name) | |
1003 | { | |
1004 | fprintf (asm_out_file, ".no_dead_strip "); | |
1005 | assemble_name (asm_out_file, name); | |
1006 | fputc ('\n', asm_out_file); | |
1007 | } | |
1008 | ||
ae46c4e0 | 1009 | void |
9c808aad AJ |
1010 | machopic_select_section (tree exp, int reloc, |
1011 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
ae46c4e0 | 1012 | { |
3d7964d5 | 1013 | void (*base_function)(void); |
f1a66265 GK |
1014 | bool weak_p = DECL_P (exp) && DECL_WEAK (exp); |
1015 | static void (* const base_funs[][2])(void) = { | |
1016 | { text_section, text_coal_section }, | |
1017 | { text_unlikely_section, text_unlikely_coal_section }, | |
1018 | { readonly_data_section, const_coal_section }, | |
1019 | { const_data_section, const_data_coal_section }, | |
1020 | { data_section, data_coal_section } | |
1021 | }; | |
1022 | ||
1023 | if (TREE_CODE (exp) == FUNCTION_DECL) | |
1024 | base_function = base_funs[reloc][weak_p]; | |
1025 | else if (decl_readonly_section_1 (exp, reloc, MACHOPIC_INDIRECT)) | |
1026 | base_function = base_funs[2][weak_p]; | |
3d7964d5 | 1027 | else if (TREE_READONLY (exp) || TREE_CONSTANT (exp)) |
f1a66265 | 1028 | base_function = base_funs[3][weak_p]; |
3d7964d5 | 1029 | else |
f1a66265 | 1030 | base_function = base_funs[4][weak_p]; |
9c808aad | 1031 | |
3d7964d5 | 1032 | if (TREE_CODE (exp) == STRING_CST |
9c808aad | 1033 | && ((size_t) TREE_STRING_LENGTH (exp) |
3521b33c | 1034 | == strlen (TREE_STRING_POINTER (exp)) + 1)) |
3d7964d5 GK |
1035 | cstring_section (); |
1036 | else if ((TREE_CODE (exp) == INTEGER_CST || TREE_CODE (exp) == REAL_CST) | |
1037 | && flag_merge_constants) | |
ae46c4e0 RH |
1038 | { |
1039 | tree size = TYPE_SIZE (TREE_TYPE (exp)); | |
1040 | ||
1041 | if (TREE_CODE (size) == INTEGER_CST && | |
1042 | TREE_INT_CST_LOW (size) == 4 && | |
1043 | TREE_INT_CST_HIGH (size) == 0) | |
1044 | literal4_section (); | |
1045 | else if (TREE_CODE (size) == INTEGER_CST && | |
1046 | TREE_INT_CST_LOW (size) == 8 && | |
1047 | TREE_INT_CST_HIGH (size) == 0) | |
1048 | literal8_section (); | |
1049 | else | |
3d7964d5 | 1050 | base_function (); |
ae46c4e0 RH |
1051 | } |
1052 | else if (TREE_CODE (exp) == CONSTRUCTOR | |
1053 | && TREE_TYPE (exp) | |
1054 | && TREE_CODE (TREE_TYPE (exp)) == RECORD_TYPE | |
1055 | && TYPE_NAME (TREE_TYPE (exp))) | |
1056 | { | |
1057 | tree name = TYPE_NAME (TREE_TYPE (exp)); | |
1058 | if (TREE_CODE (name) == TYPE_DECL) | |
1059 | name = DECL_NAME (name); | |
1060 | if (!strcmp (IDENTIFIER_POINTER (name), "NSConstantString")) | |
1061 | objc_constant_string_object_section (); | |
1062 | else if (!strcmp (IDENTIFIER_POINTER (name), "NXConstantString")) | |
1063 | objc_string_object_section (); | |
ae46c4e0 | 1064 | else |
3d7964d5 | 1065 | base_function (); |
ae46c4e0 RH |
1066 | } |
1067 | else if (TREE_CODE (exp) == VAR_DECL && | |
1068 | DECL_NAME (exp) && | |
1069 | TREE_CODE (DECL_NAME (exp)) == IDENTIFIER_NODE && | |
1070 | IDENTIFIER_POINTER (DECL_NAME (exp)) && | |
1071 | !strncmp (IDENTIFIER_POINTER (DECL_NAME (exp)), "_OBJC_", 6)) | |
1072 | { | |
1073 | const char *name = IDENTIFIER_POINTER (DECL_NAME (exp)); | |
1074 | ||
1075 | if (!strncmp (name, "_OBJC_CLASS_METHODS_", 20)) | |
1076 | objc_cls_meth_section (); | |
1077 | else if (!strncmp (name, "_OBJC_INSTANCE_METHODS_", 23)) | |
1078 | objc_inst_meth_section (); | |
1079 | else if (!strncmp (name, "_OBJC_CATEGORY_CLASS_METHODS_", 20)) | |
1080 | objc_cat_cls_meth_section (); | |
1081 | else if (!strncmp (name, "_OBJC_CATEGORY_INSTANCE_METHODS_", 23)) | |
1082 | objc_cat_inst_meth_section (); | |
1083 | else if (!strncmp (name, "_OBJC_CLASS_VARIABLES_", 22)) | |
1084 | objc_class_vars_section (); | |
1085 | else if (!strncmp (name, "_OBJC_INSTANCE_VARIABLES_", 25)) | |
1086 | objc_instance_vars_section (); | |
1087 | else if (!strncmp (name, "_OBJC_CLASS_PROTOCOLS_", 22)) | |
1088 | objc_cat_cls_meth_section (); | |
1089 | else if (!strncmp (name, "_OBJC_CLASS_NAME_", 17)) | |
1090 | objc_class_names_section (); | |
1091 | else if (!strncmp (name, "_OBJC_METH_VAR_NAME_", 20)) | |
1092 | objc_meth_var_names_section (); | |
1093 | else if (!strncmp (name, "_OBJC_METH_VAR_TYPE_", 20)) | |
1094 | objc_meth_var_types_section (); | |
1095 | else if (!strncmp (name, "_OBJC_CLASS_REFERENCES", 22)) | |
1096 | objc_cls_refs_section (); | |
1097 | else if (!strncmp (name, "_OBJC_CLASS_", 12)) | |
1098 | objc_class_section (); | |
1099 | else if (!strncmp (name, "_OBJC_METACLASS_", 16)) | |
1100 | objc_meta_class_section (); | |
1101 | else if (!strncmp (name, "_OBJC_CATEGORY_", 15)) | |
1102 | objc_category_section (); | |
1103 | else if (!strncmp (name, "_OBJC_SELECTOR_REFERENCES", 25)) | |
1104 | objc_selector_refs_section (); | |
1105 | else if (!strncmp (name, "_OBJC_SELECTOR_FIXUP", 20)) | |
1106 | objc_selector_fixup_section (); | |
1107 | else if (!strncmp (name, "_OBJC_SYMBOLS", 13)) | |
1108 | objc_symbols_section (); | |
1109 | else if (!strncmp (name, "_OBJC_MODULES", 13)) | |
1110 | objc_module_info_section (); | |
264fa2db ZL |
1111 | else if (!strncmp (name, "_OBJC_IMAGE_INFO", 16)) |
1112 | objc_image_info_section (); | |
ae46c4e0 RH |
1113 | else if (!strncmp (name, "_OBJC_PROTOCOL_INSTANCE_METHODS_", 32)) |
1114 | objc_cat_inst_meth_section (); | |
1115 | else if (!strncmp (name, "_OBJC_PROTOCOL_CLASS_METHODS_", 29)) | |
1116 | objc_cat_cls_meth_section (); | |
1117 | else if (!strncmp (name, "_OBJC_PROTOCOL_REFS_", 20)) | |
1118 | objc_cat_cls_meth_section (); | |
1119 | else if (!strncmp (name, "_OBJC_PROTOCOL_", 15)) | |
1120 | objc_protocol_section (); | |
ae46c4e0 | 1121 | else |
3d7964d5 | 1122 | base_function (); |
ae46c4e0 | 1123 | } |
f1a66265 GK |
1124 | /* ::operator new and ::operator delete must be coalesced, even |
1125 | if not weak. There are 8 variants that we look for. */ | |
1126 | else if (TREE_CODE (exp) == FUNCTION_DECL | |
1127 | && ! DECL_ONE_ONLY (exp)) | |
1128 | { | |
1129 | const char * name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (exp)); | |
1130 | if (name[0] == '_' && name[1] == 'Z' | |
1131 | && ((name[2] == 'n' && (name[3] == 'a' || name[3] == 'w') | |
1132 | && name[4] == 'm') | |
1133 | || (name[2] == 'd' && (name[3] == 'a' || name[3] == 'l') | |
1134 | && name[4] == 'P' && name[5] == 'v'))) | |
1135 | { | |
1136 | bool delete_p = name[2] == 'd'; | |
1137 | if (name[5 + delete_p] == 0 | |
1138 | || strcmp (name + 5 + delete_p, "KSt9nothrow_t") == 0) | |
1139 | base_funs[reloc][1] (); | |
1140 | else | |
1141 | base_function (); | |
1142 | } | |
1143 | else | |
1144 | base_function (); | |
1145 | } | |
ae46c4e0 | 1146 | else |
3d7964d5 | 1147 | base_function (); |
ae46c4e0 RH |
1148 | } |
1149 | ||
b64a1b53 | 1150 | /* This can be called with address expressions as "rtx". |
991b6592 | 1151 | They must go in "const". */ |
b64a1b53 RH |
1152 | |
1153 | void | |
9c808aad AJ |
1154 | machopic_select_rtx_section (enum machine_mode mode, rtx x, |
1155 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 RH |
1156 | { |
1157 | if (GET_MODE_SIZE (mode) == 8) | |
1158 | literal8_section (); | |
1159 | else if (GET_MODE_SIZE (mode) == 4 | |
1160 | && (GET_CODE (x) == CONST_INT | |
1161 | || GET_CODE (x) == CONST_DOUBLE)) | |
1162 | literal4_section (); | |
86b0a4f3 | 1163 | else if (MACHOPIC_INDIRECT |
2e53734e GK |
1164 | && (GET_CODE (x) == SYMBOL_REF |
1165 | || GET_CODE (x) == CONST | |
1166 | || GET_CODE (x) == LABEL_REF)) | |
1167 | const_data_section (); | |
b64a1b53 RH |
1168 | else |
1169 | const_section (); | |
1170 | } | |
1171 | ||
2cc07db4 | 1172 | void |
9c808aad | 1173 | machopic_asm_out_constructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1174 | { |
ab82a49f | 1175 | if (MACHOPIC_INDIRECT) |
2cc07db4 RH |
1176 | mod_init_section (); |
1177 | else | |
1178 | constructor_section (); | |
c8af3574 RH |
1179 | assemble_align (POINTER_SIZE); |
1180 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1181 | |
ab82a49f | 1182 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1183 | fprintf (asm_out_file, ".reference .constructors_used\n"); |
1184 | } | |
1185 | ||
1186 | void | |
9c808aad | 1187 | machopic_asm_out_destructor (rtx symbol, int priority ATTRIBUTE_UNUSED) |
2cc07db4 | 1188 | { |
ab82a49f | 1189 | if (MACHOPIC_INDIRECT) |
2cc07db4 RH |
1190 | mod_term_section (); |
1191 | else | |
1192 | destructor_section (); | |
c8af3574 RH |
1193 | assemble_align (POINTER_SIZE); |
1194 | assemble_integer (symbol, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); | |
2cc07db4 | 1195 | |
ab82a49f | 1196 | if (! MACHOPIC_INDIRECT) |
2cc07db4 RH |
1197 | fprintf (asm_out_file, ".reference .destructors_used\n"); |
1198 | } | |
e2500fed | 1199 | |
5eb99654 | 1200 | void |
9c808aad | 1201 | darwin_globalize_label (FILE *stream, const char *name) |
5eb99654 KG |
1202 | { |
1203 | if (!!strncmp (name, "_OBJC_", 6)) | |
1204 | default_globalize_label (stream, name); | |
1205 | } | |
1206 | ||
4746cf84 | 1207 | void |
c18a5b6c MM |
1208 | darwin_asm_named_section (const char *name, |
1209 | unsigned int flags ATTRIBUTE_UNUSED, | |
1210 | tree decl ATTRIBUTE_UNUSED) | |
4746cf84 | 1211 | { |
f1a66265 | 1212 | fprintf (asm_out_file, "\t.section %s\n", name); |
4746cf84 MA |
1213 | } |
1214 | ||
4746cf84 | 1215 | void |
f1a66265 | 1216 | darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) |
4746cf84 | 1217 | { |
f1a66265 | 1218 | /* Darwin does not use unique sections. */ |
4746cf84 MA |
1219 | } |
1220 | ||
005c1a13 GK |
1221 | /* Handle a "weak_import" attribute; arguments as in |
1222 | struct attribute_spec.handler. */ | |
1223 | ||
1224 | tree | |
1225 | darwin_handle_weak_import_attribute (tree *node, tree name, | |
1226 | tree ARG_UNUSED (args), | |
1227 | int ARG_UNUSED (flags), | |
1228 | bool * no_add_attrs) | |
1229 | { | |
1230 | if (TREE_CODE (*node) != FUNCTION_DECL) | |
1231 | { | |
9e637a26 | 1232 | warning ("%qs attribute ignored", IDENTIFIER_POINTER (name)); |
005c1a13 GK |
1233 | *no_add_attrs = true; |
1234 | } | |
1235 | else | |
1236 | declare_weak (*node); | |
1237 | ||
1238 | return NULL_TREE; | |
1239 | } | |
45cc4783 MS |
1240 | |
1241 | static void | |
1242 | no_dead_strip (FILE *file, const char *lab) | |
1243 | { | |
005c1a13 | 1244 | fprintf (file, ".no_dead_strip %s\n", lab); |
45cc4783 MS |
1245 | } |
1246 | ||
4746cf84 | 1247 | /* Emit a label for an FDE, making it global and/or weak if appropriate. |
eeab4d81 MS |
1248 | The third parameter is nonzero if this is for exception handling. |
1249 | The fourth parameter is nonzero if this is just a placeholder for an | |
4746cf84 | 1250 | FDE that we are omitting. */ |
eeab4d81 | 1251 | |
4746cf84 | 1252 | void |
eeab4d81 | 1253 | darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) |
4746cf84 MA |
1254 | { |
1255 | tree id = DECL_ASSEMBLER_NAME (decl) | |
1256 | ? DECL_ASSEMBLER_NAME (decl) | |
1257 | : DECL_NAME (decl); | |
1258 | ||
1259 | const char *prefix = "_"; | |
1260 | const int prefix_len = 1; | |
1261 | ||
1262 | const char *base = IDENTIFIER_POINTER (id); | |
1263 | unsigned int base_len = IDENTIFIER_LENGTH (id); | |
1264 | ||
1265 | const char *suffix = ".eh"; | |
4746cf84 MA |
1266 | |
1267 | int need_quotes = name_needs_quotes (base); | |
1268 | int quotes_len = need_quotes ? 2 : 0; | |
eeab4d81 MS |
1269 | char *lab; |
1270 | ||
1271 | if (! for_eh) | |
1272 | suffix = ".eh1"; | |
4746cf84 | 1273 | |
eeab4d81 | 1274 | lab = xmalloc (prefix_len + base_len + strlen (suffix) + quotes_len + 1); |
4746cf84 MA |
1275 | lab[0] = '\0'; |
1276 | ||
1277 | if (need_quotes) | |
1278 | strcat(lab, "\""); | |
1279 | strcat(lab, prefix); | |
1280 | strcat(lab, base); | |
1281 | strcat(lab, suffix); | |
1282 | if (need_quotes) | |
1283 | strcat(lab, "\""); | |
1284 | ||
1285 | if (TREE_PUBLIC (decl)) | |
f1a66265 | 1286 | fprintf (file, "\t%s %s\n", |
4746cf84 MA |
1287 | (DECL_VISIBILITY (decl) != VISIBILITY_HIDDEN |
1288 | ? ".globl" | |
1289 | : ".private_extern"), | |
1290 | lab); | |
1291 | ||
f1a66265 GK |
1292 | if (DECL_WEAK (decl)) |
1293 | fprintf (file, "\t.weak_definition %s\n", lab); | |
4746cf84 MA |
1294 | |
1295 | if (empty) | |
45cc4783 MS |
1296 | { |
1297 | fprintf (file, "%s = 0\n", lab); | |
1298 | ||
1299 | /* Mark the absolute .eh and .eh1 style labels as needed to | |
1300 | ensure that we don't dead code strip them and keep such | |
1301 | labels from another instantiation point until we can fix this | |
1302 | properly with group comdat support. */ | |
1303 | no_dead_strip (file, lab); | |
1304 | } | |
4746cf84 MA |
1305 | else |
1306 | fprintf (file, "%s:\n", lab); | |
1307 | ||
1308 | free (lab); | |
1309 | } | |
1310 | ||
1311 | /* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ | |
eeab4d81 | 1312 | |
4746cf84 MA |
1313 | void |
1314 | darwin_non_lazy_pcrel (FILE *file, rtx addr) | |
1315 | { | |
4746cf84 MA |
1316 | const char *nlp_name; |
1317 | ||
1318 | if (GET_CODE (addr) != SYMBOL_REF) | |
1319 | abort (); | |
1320 | ||
11abc112 | 1321 | nlp_name = machopic_indirection_name (addr, /*stub_p=*/false); |
4746cf84 MA |
1322 | fputs ("\t.long\t", file); |
1323 | ASM_OUTPUT_LABELREF (file, nlp_name); | |
1324 | fputs ("-.", file); | |
1325 | } | |
1326 | ||
6ce4806b MA |
1327 | /* Emit an assembler directive to set visibility for a symbol. The |
1328 | only supported visibilities are VISIBILITY_DEFAULT and | |
1329 | VISIBILITY_HIDDEN; the latter corresponds to Darwin's "private | |
1330 | extern". There is no MACH-O equivalent of ELF's | |
1331 | VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ | |
1332 | ||
1333 | void | |
1334 | darwin_assemble_visibility (tree decl, int vis) | |
1335 | { | |
1336 | if (vis == VISIBILITY_DEFAULT) | |
1337 | ; | |
1338 | else if (vis == VISIBILITY_HIDDEN) | |
1339 | { | |
1340 | fputs ("\t.private_extern ", asm_out_file); | |
1341 | assemble_name (asm_out_file, | |
1342 | (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)))); | |
1343 | fputs ("\n", asm_out_file); | |
1344 | } | |
1345 | else | |
9940eedb | 1346 | warning ("internal and protected visibility attributes not supported " |
6ce4806b MA |
1347 | "in this configuration; ignored"); |
1348 | } | |
1349 | ||
7606e68f SS |
1350 | /* Output a difference of two labels that will be an assembly time |
1351 | constant if the two labels are local. (.long lab1-lab2 will be | |
1352 | very different if lab1 is at the boundary between two sections; it | |
1353 | will be relocated according to the second section, not the first, | |
1354 | so one ends up with a difference between labels in different | |
1355 | sections, which is bad in the dwarf2 eh context for instance.) */ | |
1356 | ||
1357 | static int darwin_dwarf_label_counter; | |
1358 | ||
1359 | void | |
9c808aad AJ |
1360 | darwin_asm_output_dwarf_delta (FILE *file, int size ATTRIBUTE_UNUSED, |
1361 | const char *lab1, const char *lab2) | |
7606e68f | 1362 | { |
4746cf84 MA |
1363 | int islocaldiff = (lab1[0] == '*' && lab1[1] == 'L' |
1364 | && lab2[0] == '*' && lab2[1] == 'L'); | |
7606e68f SS |
1365 | |
1366 | if (islocaldiff) | |
1367 | fprintf (file, "\t.set L$set$%d,", darwin_dwarf_label_counter); | |
1368 | else | |
1369 | fprintf (file, "\t%s\t", ".long"); | |
1370 | assemble_name (file, lab1); | |
1371 | fprintf (file, "-"); | |
1372 | assemble_name (file, lab2); | |
1373 | if (islocaldiff) | |
1374 | fprintf (file, "\n\t.long L$set$%d", darwin_dwarf_label_counter++); | |
1375 | } | |
1376 | ||
a5fe455b | 1377 | void |
9c808aad | 1378 | darwin_file_end (void) |
a5fe455b ZW |
1379 | { |
1380 | machopic_finish (asm_out_file); | |
1381 | if (strcmp (lang_hooks.name, "GNU C++") == 0) | |
1382 | { | |
1383 | constructor_section (); | |
1384 | destructor_section (); | |
1385 | ASM_OUTPUT_ALIGN (asm_out_file, 1); | |
1386 | } | |
92b9a671 | 1387 | fprintf (asm_out_file, "\t.subsections_via_symbols\n"); |
a5fe455b ZW |
1388 | } |
1389 | ||
699c914a MS |
1390 | /* True, iff we're generating fast turn around debugging code. When |
1391 | true, we arrange for function prologues to start with 4 nops so | |
1392 | that gdb may insert code to redirect them, and for data to accessed | |
1393 | indirectly. The runtime uses this indirection to forward | |
1394 | references for data to the original instance of that data. */ | |
1395 | ||
1396 | int darwin_fix_and_continue; | |
1397 | const char *darwin_fix_and_continue_switch; | |
1398 | ||
e2500fed | 1399 | #include "gt-darwin.h" |