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80d725d7 | 1 | /* Target definitions for PowerPC running Darwin (Mac OS X). |
fbd26352 | 2 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
80d725d7 | 3 | Contributed by Apple Computer Inc. |
4 | ||
3a5a28e2 | 5 | This file is part of GCC. |
80d725d7 | 6 | |
3a5a28e2 | 7 | GCC is free software; you can redistribute it and/or modify it |
8 | under the terms of the GNU General Public License as published | |
038d1e19 | 9 | by the Free Software Foundation; either version 3, or (at your |
3a5a28e2 | 10 | option) any later version. |
80d725d7 | 11 | |
3a5a28e2 | 12 | GCC is distributed in the hope that it will be useful, but WITHOUT |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
80d725d7 | 16 | |
3a5a28e2 | 17 | You should have received a copy of the GNU General Public License |
038d1e19 | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
80d725d7 | 20 | |
90ff10b3 | 21 | #undef DARWIN_PPC |
22 | #define DARWIN_PPC 1 | |
23 | ||
80d725d7 | 24 | /* The "Darwin ABI" is mostly like AIX, but with some key differences. */ |
25 | ||
26 | #define DEFAULT_ABI ABI_DARWIN | |
27 | ||
bcba0559 | 28 | #ifdef IN_LIBGCC2 |
29 | #undef TARGET_64BIT | |
30 | #ifdef __powerpc64__ | |
31 | #define TARGET_64BIT 1 | |
32 | #else | |
33 | #define TARGET_64BIT 0 | |
34 | #endif | |
35 | #endif | |
36 | ||
80d725d7 | 37 | /* The object file format is Mach-O. */ |
38 | ||
39 | #define TARGET_OBJECT_FORMAT OBJECT_MACHO | |
40 | ||
6db57367 | 41 | /* Size of the Obj-C jump buffer. */ |
42 | #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1)) | |
43 | ||
80d725d7 | 44 | /* We're not ever going to do TOCs. */ |
45 | ||
46 | #define TARGET_TOC 0 | |
47 | #define TARGET_NO_TOC 1 | |
48 | ||
09c6aad0 | 49 | /* Override the default rs6000 definition. */ |
50 | #undef PTRDIFF_TYPE | |
51 | #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") | |
52 | ||
7f1f8831 | 53 | #define TARGET_OS_CPP_BUILTINS() \ |
54 | do \ | |
55 | { \ | |
56 | if (!TARGET_64BIT) builtin_define ("__ppc__"); \ | |
57 | if (TARGET_64BIT) builtin_define ("__ppc64__"); \ | |
58 | builtin_define ("__POWERPC__"); \ | |
59 | builtin_define ("__NATURAL_ALIGNMENT__"); \ | |
60 | darwin_cpp_builtins (pfile); \ | |
61 | } \ | |
5b2c8acb | 62 | while (0) |
80d725d7 | 63 | |
3cf7ab3b | 64 | /* Generate branch islands stubs if this is true. */ |
65 | extern int darwin_emit_branch_islands; | |
66 | ||
7f1f8831 | 67 | #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options () |
ea1f8f68 | 68 | |
3bf418bd | 69 | #define C_COMMON_OVERRIDE_OPTIONS do { \ |
70 | /* On powerpc, __cxa_get_exception_ptr is available starting in the \ | |
3da996b9 | 71 | 10.4.6 libstdc++.dylib. */ \ |
7f1f8831 | 72 | if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \ |
3bf418bd | 73 | && flag_use_cxa_get_exception_ptr == 2) \ |
74 | flag_use_cxa_get_exception_ptr = 0; \ | |
5b182752 | 75 | if (flag_mkernel) \ |
76 | flag_no_builtin = 1; \ | |
77 | SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \ | |
3bf418bd | 78 | } while (0) |
79 | ||
ea1f8f68 | 80 | /* Darwin has 128-bit long double support in libc in 10.4 and later. |
81 | Default to 128-bit long doubles even on earlier platforms for ABI | |
82 | consistency; arithmetic will work even if libc and libm support is | |
83 | not available. */ | |
84 | ||
85 | #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 | |
86 | ||
8f74ae7b | 87 | |
80d725d7 | 88 | /* We want -fPIC by default, unless we're using -static to compile for |
2c2747c3 | 89 | the kernel or some such. The "-faltivec" option should have been |
90 | called "-maltivec" all along. */ | |
80d725d7 | 91 | |
841b2052 | 92 | #define CC1_SPEC "\ |
7cfb6ab6 | 93 | %(cc1_cpu) \ |
5b182752 | 94 | %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \ |
95 | %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\ | |
2c2747c3 | 96 | %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \ |
97 | %{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \ | |
98 | %<faltivec %<fno-altivec " \ | |
99 | DARWIN_CC1_SPEC | |
80d725d7 | 100 | |
84eba009 | 101 | #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}" |
102 | ||
7933edb3 | 103 | #define DARWIN_SUBARCH_SPEC " \ |
104 | %{m64: ppc64} \ | |
105 | %{!m64: \ | |
106 | %{mcpu=601:ppc601; \ | |
107 | mcpu=603:ppc603; \ | |
108 | mcpu=603e:ppc603; \ | |
109 | mcpu=604:ppc604; \ | |
110 | mcpu=604e:ppc604e; \ | |
111 | mcpu=740:ppc750; \ | |
112 | mcpu=750:ppc750; \ | |
113 | mcpu=G3:ppc750; \ | |
114 | mcpu=7400:ppc7400; \ | |
115 | mcpu=G4:ppc7400; \ | |
116 | mcpu=7450:ppc7450; \ | |
117 | mcpu=970:ppc970; \ | |
118 | mcpu=power4:ppc970; \ | |
119 | mcpu=G5:ppc970; \ | |
120 | :ppc}}" | |
121 | ||
738b5536 | 122 | /* We need to jam the crt to 10.5 for 10.6 (Rosetta) use. */ |
123 | #undef DARWIN_CRT1_SPEC | |
124 | #define DARWIN_CRT1_SPEC \ | |
125 | "%:version-compare(!> 10.5 mmacosx-version-min= -lcrt1.o) \ | |
126 | %:version-compare(>< 10.5 10.7 mmacosx-version-min= -lcrt1.10.5.o) \ | |
127 | %{fgnu-tm: -lcrttms.o}" | |
128 | ||
bbdc1b6b | 129 | /* crt2.o is at least partially required for 10.3.x and earlier. */ |
130 | #define DARWIN_CRT2_SPEC \ | |
131 | "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}" | |
132 | ||
62cb8057 | 133 | #undef SUBTARGET_EXTRA_SPECS |
134 | #define SUBTARGET_EXTRA_SPECS \ | |
0be93128 | 135 | DARWIN_EXTRA_SPECS \ |
84eba009 | 136 | { "darwin_arch", DARWIN_ARCH_SPEC }, \ |
bbdc1b6b | 137 | { "darwin_crt2", DARWIN_CRT2_SPEC }, \ |
7933edb3 | 138 | { "darwin_subarch", DARWIN_SUBARCH_SPEC }, |
62cb8057 | 139 | |
738b5536 | 140 | /* We need to jam the dylib crt to 10.5 for 10.6 (Rosetta) use. */ |
141 | #undef DARWIN_DYLIB1_SPEC | |
142 | #define DARWIN_DYLIB1_SPEC \ | |
143 | "%:version-compare(!> 10.5 mmacosx-version-min= -ldylib1.o) \ | |
144 | %:version-compare(>< 10.5 10.7 mmacosx-version-min= -ldylib1.10.5.o)" | |
145 | ||
19f8705d | 146 | /* Output a .machine directive. */ |
147 | #undef TARGET_ASM_FILE_START | |
148 | #define TARGET_ASM_FILE_START rs6000_darwin_file_start | |
149 | ||
753b3646 | 150 | /* Make both r2 and r13 available for allocation. */ |
646b2fe6 | 151 | #define FIXED_R2 0 |
80d725d7 | 152 | #define FIXED_R13 0 |
153 | ||
80d725d7 | 154 | /* Base register for access to local variables of the function. */ |
155 | ||
eb8c35b0 | 156 | #undef HARD_FRAME_POINTER_REGNUM |
157 | #define HARD_FRAME_POINTER_REGNUM 30 | |
80d725d7 | 158 | |
479d644a | 159 | #undef RS6000_PIC_OFFSET_TABLE_REGNUM |
160 | #define RS6000_PIC_OFFSET_TABLE_REGNUM 31 | |
80d725d7 | 161 | |
9dc9f89c | 162 | /* Darwin's stack must remain 16-byte aligned for both 32 and 64 bit |
163 | ABIs. */ | |
164 | ||
165 | #undef STACK_BOUNDARY | |
166 | #define STACK_BOUNDARY 128 | |
167 | ||
168 | /* Offset within stack frame to start allocating local variables at. | |
169 | For supported Darwin versions, FRAME_GROWS_DOWNWARD is true, therefore | |
170 | this value is the offset to the END of the first local allocated. | |
171 | ||
172 | On the RS/6000, the frame pointer is the same as the stack pointer, | |
173 | except for dynamic allocations. So we start after the fixed area and | |
174 | outgoing parameter area. | |
175 | ||
176 | If the function uses dynamic stack space (CALLS_ALLOCA is set), that | |
177 | space needs to be aligned to STACK_BOUNDARY, i.e. the sum of the | |
178 | sizes of the fixed area and the parameter area must be a multiple of | |
179 | STACK_BOUNDARY. */ | |
80d725d7 | 180 | |
8374586c | 181 | #undef RS6000_STARTING_FRAME_OFFSET |
182 | #define RS6000_STARTING_FRAME_OFFSET \ | |
9dc9f89c | 183 | (cfun->calls_alloca \ |
184 | ? RS6000_ALIGN (crtl->outgoing_args_size + RS6000_SAVE_AREA, 16) \ | |
185 | : (RS6000_ALIGN (crtl->outgoing_args_size, 16) + RS6000_SAVE_AREA)) | |
186 | ||
187 | /* Offset from the stack pointer register to an item dynamically | |
188 | allocated on the stack, e.g., by `alloca'. | |
189 | ||
190 | The default value for this macro is `STACK_POINTER_OFFSET' plus the | |
191 | length of the outgoing arguments. The default is correct for most | |
192 | machines. See `function.c' for details. | |
193 | ||
194 | This value must be a multiple of STACK_BOUNDARY (hard coded in | |
195 | `emit-rtl.c'). */ | |
80d725d7 | 196 | |
197 | #undef STACK_DYNAMIC_OFFSET | |
198 | #define STACK_DYNAMIC_OFFSET(FUNDECL) \ | |
9dc9f89c | 199 | RS6000_ALIGN (crtl->outgoing_args_size.to_constant() \ |
200 | + STACK_POINTER_OFFSET, 16) | |
80d725d7 | 201 | |
133acd7c | 202 | /* Darwin uses a function call if everything needs to be saved/restored. */ |
053e7007 | 203 | |
133acd7c | 204 | #undef WORLD_SAVE_P |
205 | #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p) | |
206 | ||
053e7007 | 207 | /* We don't use these on Darwin, they are just place-holders. */ |
208 | #define SAVE_FP_PREFIX "" | |
209 | #define SAVE_FP_SUFFIX "" | |
210 | #define RESTORE_FP_PREFIX "" | |
211 | #define RESTORE_FP_SUFFIX "" | |
212 | ||
15460c97 | 213 | /* The assembler wants the alternate register names, but without |
214 | leading percent sign. */ | |
80d725d7 | 215 | #undef REGISTER_NAMES |
15460c97 | 216 | #define REGISTER_NAMES \ |
217 | { \ | |
218 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
219 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
220 | "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ | |
221 | "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \ | |
222 | "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ | |
223 | "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ | |
224 | "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ | |
225 | "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ | |
226 | "mq", "lr", "ctr", "ap", \ | |
227 | "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \ | |
228 | "xer", \ | |
229 | "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \ | |
230 | "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \ | |
231 | "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \ | |
232 | "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \ | |
233 | "vrsave", "vscr", \ | |
79d68a42 | 234 | "sfp", \ |
bc550266 | 235 | "tfhar", "tfiar", "texasr" \ |
15460c97 | 236 | } |
80d725d7 | 237 | |
018718de | 238 | /* This outputs NAME to FILE. */ |
239 | ||
240 | #undef RS6000_OUTPUT_BASENAME | |
241 | #define RS6000_OUTPUT_BASENAME(FILE, NAME) \ | |
1d1395b2 | 242 | assemble_name (FILE, NAME) |
018718de | 243 | |
67c1e638 | 244 | /* Globalizing directive for a label. */ |
245 | #undef GLOBAL_ASM_OP | |
246 | #define GLOBAL_ASM_OP "\t.globl " | |
247 | #undef TARGET_ASM_GLOBALIZE_LABEL | |
80d725d7 | 248 | |
249 | /* This is how to output an internal label prefix. rs6000.c uses this | |
250 | when generating traceback tables. */ | |
251 | /* Not really used for Darwin? */ | |
252 | ||
253 | #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX | |
254 | #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \ | |
255 | fprintf (FILE, "%s", PREFIX) | |
256 | ||
8b169867 | 257 | /* Override the standard rs6000 definition. */ |
258 | ||
259 | #undef ASM_COMMENT_START | |
260 | #define ASM_COMMENT_START ";" | |
261 | ||
bb8e8204 | 262 | /* This is how to output an assembler line that says to advance |
263 | the location counter to a multiple of 2**LOG bytes using the | |
264 | "nop" instruction as padding. */ | |
265 | ||
b82438e9 | 266 | #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \ |
267 | do \ | |
268 | { \ | |
269 | if ((LOG) < 3) \ | |
270 | { \ | |
271 | ASM_OUTPUT_ALIGN (FILE,LOG); \ | |
272 | } \ | |
273 | else /* nop == ori r0,r0,0 */ \ | |
274 | fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \ | |
275 | } while (0) | |
bb8e8204 | 276 | |
12fc733d | 277 | #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN |
278 | /* This is supported in cctools 465 and later. The macro test | |
279 | above prevents using it in earlier build environments. */ | |
ee11b6d4 | 280 | #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ |
281 | if ((LOG) != 0) \ | |
282 | { \ | |
283 | if ((MAX_SKIP) == 0) \ | |
284 | fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ | |
285 | else \ | |
286 | fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ | |
287 | } | |
12fc733d | 288 | #endif |
289 | ||
70026e8a | 290 | /* Generate insns to call the profiler. */ |
291 | ||
80d725d7 | 292 | #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL) |
293 | ||
294 | /* Function name to call to do profiling. */ | |
295 | ||
296 | #define RS6000_MCOUNT "*mcount" | |
297 | ||
09c6aad0 | 298 | /* Default processor: G4, and G5 for 64-bit. */ |
979b4d09 | 299 | |
300 | #undef PROCESSOR_DEFAULT | |
301 | #define PROCESSOR_DEFAULT PROCESSOR_PPC7400 | |
09c6aad0 | 302 | #undef PROCESSOR_DEFAULT64 |
303 | #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4 | |
979b4d09 | 304 | |
305 | /* Default target flag settings. Despite the fact that STMW/LMW | |
2cecd772 | 306 | serializes, it's still a big code size win to use them. Use FSEL by |
979b4d09 | 307 | default as well. */ |
308 | ||
309 | #undef TARGET_DEFAULT | |
4ff70f1c | 310 | #define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT) |
979b4d09 | 311 | |
180aaed7 | 312 | /* Darwin always uses IBM long double, never IEEE long double. */ |
baad77c2 | 313 | #undef TARGET_IEEEQUAD |
314 | #define TARGET_IEEEQUAD 0 | |
1106f6fc | 315 | |
2f89b19d | 316 | #undef TARGET_IEEEQUAD_DEFAULT |
317 | #define TARGET_IEEEQUAD_DEFAULT 0 | |
318 | ||
80d725d7 | 319 | /* Since Darwin doesn't do TOCs, stub this out. */ |
320 | ||
8fc24c57 | 321 | #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0) |
80d725d7 | 322 | |
bb7e93c8 | 323 | /* Unlike most other PowerPC targets, chars are signed, for |
324 | consistency with other Darwin architectures. */ | |
325 | ||
326 | #undef DEFAULT_SIGNED_CHAR | |
327 | #define DEFAULT_SIGNED_CHAR (1) | |
328 | ||
bcba0559 | 329 | /* Given an rtx X being reloaded into a reg required to be |
330 | in class CLASS, return the class of reg to actually use. | |
80d725d7 | 331 | In general this is just CLASS; but on some machines |
332 | in some cases it is preferable to use a more restrictive class. | |
bcba0559 | 333 | |
80d725d7 | 334 | On the RS/6000, we have to return NO_REGS when we want to reload a |
335 | floating-point CONST_DOUBLE to force it to be copied to memory. | |
336 | ||
337 | Don't allow R0 when loading the address of, or otherwise furtling with, | |
338 | a SYMBOL_REF. */ | |
339 | ||
340 | #undef PREFERRED_RELOAD_CLASS | |
b62f104a | 341 | #define PREFERRED_RELOAD_CLASS(X,CLASS) \ |
f204663d | 342 | ((CONSTANT_P (X) \ |
343 | && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \ | |
b62f104a | 344 | ? NO_REGS \ |
345 | : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \ | |
346 | && reg_class_subset_p (BASE_REGS, (CLASS))) \ | |
347 | ? BASE_REGS \ | |
348 | : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \ | |
349 | && (CLASS) == NON_SPECIAL_REGS) \ | |
350 | ? GENERAL_REGS \ | |
351 | : (CLASS)) | |
80d725d7 | 352 | |
8ef52e35 | 353 | /* Compute field alignment. |
354 | This implements the 'power' alignment rule by pegging the alignment of | |
355 | items (beyond the first aggregate field) to 32 bits. The pegging is | |
356 | suppressed for vector and long double items (both 128 in size). | |
357 | There is a dummy use of the FIELD argument to avoid an unused variable | |
358 | warning (see PR59496). */ | |
700a9760 | 359 | #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \ |
8ef52e35 | 360 | ((void) (FIELD), \ |
361 | (TARGET_ALIGN_NATURAL \ | |
362 | ? (COMPUTED) \ | |
363 | : (COMPUTED) == 128 \ | |
364 | ? 128 \ | |
365 | : MIN ((COMPUTED), 32))) | |
3c8fd74f | 366 | |
8eaf2dd1 | 367 | /* Darwin increases natural record alignment to doubleword if the first |
368 | field is an FP double while the FP fields remain word aligned. */ | |
c8dfb8ef | 369 | #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ |
370 | ((TREE_CODE (STRUCT) == RECORD_TYPE \ | |
371 | || TREE_CODE (STRUCT) == UNION_TYPE \ | |
372 | || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ | |
373 | && TARGET_ALIGN_NATURAL == 0 \ | |
374 | ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ | |
375 | : (TREE_CODE (STRUCT) == VECTOR_TYPE \ | |
376 | && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \ | |
377 | ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \ | |
8eaf2dd1 | 378 | : MAX ((COMPUTED), (SPECIFIED))) |
2740149d | 379 | |
7aafe47c | 380 | /* Specify padding for the last element of a block move between |
381 | registers and memory. FIRST is nonzero if this is the only | |
382 | element. */ | |
383 | #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ | |
d7ab0e3d | 384 | (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE)) |
7aafe47c | 385 | |
367a6c4c | 386 | #define DOUBLE_INT_ASM_OP "\t.quad\t" |
ad3ed368 | 387 | |
557840a9 | 388 | /* For binary compatibility with 2.95; Darwin C APIs use bool from |
31c2995d | 389 | stdbool.h, which was an int-sized enum in 2.95. Users can explicitly |
390 | choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */ | |
31c2995d | 391 | #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE) |
7e4d3bd6 | 392 | |
393 | #undef REGISTER_TARGET_PRAGMAS | |
02e6a8e1 | 394 | #define REGISTER_TARGET_PRAGMAS() \ |
395 | do \ | |
396 | { \ | |
397 | DARWIN_REGISTER_TARGET_PRAGMAS(); \ | |
398 | targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \ | |
399 | } \ | |
400 | while (0) | |
d84c6db8 | 401 | |
60ea93bb | 402 | #ifdef IN_LIBGCC2 |
403 | #include <stdbool.h> | |
404 | #endif | |
405 | ||
f0ed0e8a | 406 | /* True, iff we're generating fast turn around debugging code. When |
8063e558 | 407 | true, we arrange for function prologues to start with 5 nops so |
eb20df03 | 408 | that gdb may insert code to redirect them, and for data to be |
409 | accessed indirectly. The runtime uses this indirection to forward | |
f0ed0e8a | 410 | references for data to the original instance of that data. */ |
411 | ||
412 | #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue) | |
ddb5d39d | 413 | |
414 | /* This is the reserved direct dispatch address for Objective-C. */ | |
415 | #define OFFS_MSGSEND_FAST 0xFFFEFF00 | |
416 | ||
417 | /* This is the reserved ivar address Objective-C. */ | |
418 | #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0 | |
9b1f316f | 419 | |
420 | /* Old versions of Mac OS/Darwin don't have C99 functions available. */ | |
30f690e0 | 421 | #undef TARGET_LIBC_HAS_FUNCTION |
422 | #define TARGET_LIBC_HAS_FUNCTION darwin_libc_has_function | |
5b182752 | 423 | |
424 | /* When generating kernel code or kexts, we don't use Altivec by | |
425 | default, as kernel code doesn't save/restore those registers. */ | |
426 | #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext) | |
6aee6ac8 | 427 | |
8e79e9d4 | 428 | /* Darwin has support for section anchors on powerpc*. |
429 | It is disabled for any section containing a "zero-sized item" (because these | |
430 | are re-written as size=1 to be compatible with the OSX ld64). | |
431 | The re-writing would interfere with the computation of anchor offsets. | |
432 | Therefore, we place zero-sized items in their own sections and make such | |
433 | sections unavailable to section anchoring. */ | |
434 | ||
435 | #undef TARGET_ASM_OUTPUT_ANCHOR | |
436 | #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor | |
437 | ||
438 | #undef TARGET_USE_ANCHORS_FOR_SYMBOL_P | |
439 | #define TARGET_USE_ANCHORS_FOR_SYMBOL_P darwin_use_anchors_for_symbol_p | |
440 | ||
441 | #undef DARWIN_SECTION_ANCHORS | |
442 | #define DARWIN_SECTION_ANCHORS 1 | |
443 | ||
d4238e8b | 444 | /* PPC Darwin has to rename some of the long double builtins. */ |
445 | #undef SUBTARGET_INIT_BUILTINS | |
446 | #define SUBTARGET_INIT_BUILTINS \ | |
447 | do { \ | |
448 | darwin_patch_builtins (); \ | |
820c090b | 449 | rs6000_builtin_decls[(unsigned) (RS6000_BUILTIN_CFSTRING)] \ |
450 | = darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_CFSTRING)); \ | |
d4238e8b | 451 | } while(0) |
988609f2 | 452 | |
453 | /* So far, there is no rs6000_fold_builtin, if one is introduced, then | |
454 | this will need to be modified similar to the x86 case. */ | |
455 | #define TARGET_FOLD_BUILTIN SUBTARGET_FOLD_BUILTIN | |
fc222f44 | 456 | |
457 | /* Use standard DWARF numbering for DWARF debugging information. */ | |
458 | #define RS6000_USE_DWARF_NUMBERING | |
459 |