1 /* Definitions of target machine for GNU compiler, 2 for 64 bit PowerPC linux. 3 Copyright (C) 2000-2014 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 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 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 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. 16 17 Under Section 7 of GPL version 3, you are granted additional 18 permissions described in the GCC Runtime Library Exception, version 19 3.1, as published by the Free Software Foundation. 20 21 You should have received a copy of the GNU General Public License and 22 a copy of the GCC Runtime Library Exception along with this program; 23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24 <http://www.gnu.org/licenses/>. */ 25 26 #ifndef RS6000_BI_ARCH 27 28 #undef TARGET_64BIT 29 #define TARGET_64BIT 1 30 31 #define DEFAULT_ARCH64_P 1 32 #define RS6000_BI_ARCH_P 0 33 34 #else 35 36 #define DEFAULT_ARCH64_P (TARGET_DEFAULT & MASK_64BIT) 37 #define RS6000_BI_ARCH_P 1 38 39 #endif 40 41 #ifdef IN_LIBGCC2 42 #undef TARGET_64BIT 43 #ifdef __powerpc64__ 44 #define TARGET_64BIT 1 45 #else 46 #define TARGET_64BIT 0 47 #endif 48 #endif 49 50 #undef TARGET_AIX 51 #define TARGET_AIX TARGET_64BIT 52 53 #ifdef HAVE_LD_NO_DOT_SYMS 54 /* New ABI uses a local sym for the function entry point. */ 55 extern int dot_symbols; 56 #undef DOT_SYMBOLS 57 #define DOT_SYMBOLS dot_symbols 58 #endif 59 60 #define TARGET_PROFILE_KERNEL profile_kernel 61 62 #define TARGET_USES_LINUX64_OPT 1 63 #ifdef HAVE_LD_LARGE_TOC 64 #undef TARGET_CMODEL 65 #define TARGET_CMODEL rs6000_current_cmodel 66 #define SET_CMODEL(opt) rs6000_current_cmodel = opt 67 #else 68 #define SET_CMODEL(opt) do {} while (0) 69 #endif 70 71 #undef PROCESSOR_DEFAULT 72 #define PROCESSOR_DEFAULT PROCESSOR_POWER7 73 #undef PROCESSOR_DEFAULT64 74 #ifdef LINUX64_DEFAULT_ABI_ELFv2 75 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER8 76 #else 77 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER7 78 #endif 79 80 /* We don't need to generate entries in .fixup, except when 81 -mrelocatable or -mrelocatable-lib is given. */ 82 #undef RELOCATABLE_NEEDS_FIXUP 83 #define RELOCATABLE_NEEDS_FIXUP \ 84 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE) 85 86 #undef RS6000_ABI_NAME 87 #define RS6000_ABI_NAME "linux" 88 89 #define INVALID_64BIT "-m%s not supported in this configuration" 90 #define INVALID_32BIT INVALID_64BIT 91 92 #ifdef LINUX64_DEFAULT_ABI_ELFv2 93 #define ELFv2_ABI_CHECK (rs6000_elf_abi != 1) 94 #else 95 #define ELFv2_ABI_CHECK (rs6000_elf_abi == 2) 96 #endif 97 98 #undef SUBSUBTARGET_OVERRIDE_OPTIONS 99 #define SUBSUBTARGET_OVERRIDE_OPTIONS \ 100 do \ 101 { \ 102 if (!global_options_set.x_rs6000_alignment_flags) \ 103 rs6000_alignment_flags = MASK_ALIGN_NATURAL; \ 104 if (TARGET_64BIT) \ 105 { \ 106 if (DEFAULT_ABI != ABI_AIX) \ 107 { \ 108 rs6000_current_abi = ABI_AIX; \ 109 error (INVALID_64BIT, "call"); \ 110 } \ 111 dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \ 112 if (ELFv2_ABI_CHECK) \ 113 { \ 114 rs6000_current_abi = ABI_ELFv2; \ 115 if (dot_symbols) \ 116 error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \ 117 } \ 118 if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \ 119 { \ 120 rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \ 121 error (INVALID_64BIT, "relocatable"); \ 122 } \ 123 if (rs6000_isa_flags & OPTION_MASK_EABI) \ 124 { \ 125 rs6000_isa_flags &= ~OPTION_MASK_EABI; \ 126 error (INVALID_64BIT, "eabi"); \ 127 } \ 128 if (TARGET_PROTOTYPE) \ 129 { \ 130 target_prototype = 0; \ 131 error (INVALID_64BIT, "prototype"); \ 132 } \ 133 if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \ 134 { \ 135 rs6000_isa_flags |= OPTION_MASK_POWERPC64; \ 136 error ("-m64 requires a PowerPC64 cpu"); \ 137 } \ 138 if ((rs6000_isa_flags_explicit \ 139 & OPTION_MASK_MINIMAL_TOC) != 0) \ 140 { \ 141 if (global_options_set.x_rs6000_current_cmodel \ 142 && rs6000_current_cmodel != CMODEL_SMALL) \ 143 error ("-mcmodel incompatible with other toc options"); \ 144 SET_CMODEL (CMODEL_SMALL); \ 145 } \ 146 else \ 147 { \ 148 if (!global_options_set.x_rs6000_current_cmodel) \ 149 SET_CMODEL (CMODEL_MEDIUM); \ 150 if (rs6000_current_cmodel != CMODEL_SMALL) \ 151 { \ 152 if (!global_options_set.x_TARGET_NO_FP_IN_TOC) \ 153 TARGET_NO_FP_IN_TOC \ 154 = rs6000_current_cmodel == CMODEL_MEDIUM; \ 155 if (!global_options_set.x_TARGET_NO_SUM_IN_TOC) \ 156 TARGET_NO_SUM_IN_TOC = 0; \ 157 } \ 158 } \ 159 } \ 160 else \ 161 { \ 162 if (!RS6000_BI_ARCH_P) \ 163 error (INVALID_32BIT, "32"); \ 164 if (TARGET_PROFILE_KERNEL) \ 165 { \ 166 TARGET_PROFILE_KERNEL = 0; \ 167 error (INVALID_32BIT, "profile-kernel"); \ 168 } \ 169 if (global_options_set.x_rs6000_current_cmodel) \ 170 { \ 171 SET_CMODEL (CMODEL_SMALL); \ 172 error (INVALID_32BIT, "cmodel"); \ 173 } \ 174 } \ 175 } \ 176 while (0) 177 178 #undef ASM_DEFAULT_SPEC 179 #undef ASM_SPEC 180 #undef LINK_OS_LINUX_SPEC 181 182 #ifndef RS6000_BI_ARCH 183 #define ASM_DEFAULT_SPEC "-mppc64" 184 #define ASM_SPEC "%(asm_spec64) %(asm_spec_common)" 185 #define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)" 186 #else 187 #if DEFAULT_ARCH64_P 188 #define ASM_DEFAULT_SPEC "-mppc%{!m32:64}" 189 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)" 190 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}" 191 #else 192 #define ASM_DEFAULT_SPEC "-mppc%{m64:64}" 193 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)" 194 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}" 195 #endif 196 #endif 197 198 #define ASM_SPEC32 "-a32 \ 199 %{mrelocatable} %{mrelocatable-lib} %{fpic|fpie|fPIC|fPIE:-K PIC} \ 200 %{memb|msdata=eabi: -memb}" 201 202 #define ASM_SPEC64 "-a64" 203 204 #define ASM_SPEC_COMMON "%(asm_cpu) \ 205 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \ 206 ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN) 207 208 #undef SUBSUBTARGET_EXTRA_SPECS 209 #define SUBSUBTARGET_EXTRA_SPECS \ 210 { "asm_spec_common", ASM_SPEC_COMMON }, \ 211 { "asm_spec32", ASM_SPEC32 }, \ 212 { "asm_spec64", ASM_SPEC64 }, \ 213 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \ 214 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 }, 215 216 #undef MULTILIB_DEFAULTS 217 #if DEFAULT_ARCH64_P 218 #define MULTILIB_DEFAULTS { "m64" } 219 #else 220 #define MULTILIB_DEFAULTS { "m32" } 221 #endif 222 223 #ifndef RS6000_BI_ARCH 224 225 /* 64-bit PowerPC Linux always has a TOC. */ 226 #undef TARGET_TOC 227 #define TARGET_TOC 1 228 229 /* Some things from sysv4.h we don't do when 64 bit. */ 230 #undef OPTION_RELOCATABLE 231 #define OPTION_RELOCATABLE 0 232 #undef OPTION_EABI 233 #define OPTION_EABI 0 234 #undef OPTION_PROTOTYPE 235 #define OPTION_PROTOTYPE 0 236 #undef RELOCATABLE_NEEDS_FIXUP 237 #define RELOCATABLE_NEEDS_FIXUP 0 238 239 #endif 240 241 /* We use glibc _mcount for profiling. */ 242 #define NO_PROFILE_COUNTERS 1 243 #define PROFILE_HOOK(LABEL) \ 244 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0) 245 246 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */ 247 #undef ADJUST_FIELD_ALIGN 248 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ 249 (rs6000_special_adjust_field_align_p ((FIELD), (COMPUTED)) \ 250 ? 128 \ 251 : (TARGET_64BIT \ 252 && TARGET_ALIGN_NATURAL == 0 \ 253 && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \ 254 ? MIN ((COMPUTED), 32) \ 255 : (COMPUTED)) 256 257 /* PowerPC64 Linux increases natural record alignment to doubleword if 258 the first field is an FP double, only if in power alignment mode. */ 259 #undef ROUND_TYPE_ALIGN 260 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ 261 ((TARGET_64BIT \ 262 && (TREE_CODE (STRUCT) == RECORD_TYPE \ 263 || TREE_CODE (STRUCT) == UNION_TYPE \ 264 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ 265 && TARGET_ALIGN_NATURAL == 0) \ 266 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ 267 : MAX ((COMPUTED), (SPECIFIED))) 268 269 /* Use the default for compiling target libs. */ 270 #ifdef IN_TARGET_LIBS 271 #undef TARGET_ALIGN_NATURAL 272 #define TARGET_ALIGN_NATURAL 1 273 #endif 274 275 /* Indicate that jump tables go in the text section. */ 276 #undef JUMP_TABLES_IN_TEXT_SECTION 277 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT 278 279 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller 280 than a doubleword should be padded upward or downward. You could 281 reasonably assume that they follow the normal rules for structure 282 layout treating the parameter area as any other block of memory, 283 then map the reg param area to registers. i.e. pad upward. 284 Setting both of the following defines results in this behavior. 285 Setting just the first one will result in aggregates that fit in a 286 doubleword being padded downward, and others being padded upward. 287 Not a bad idea as this results in struct { int x; } being passed 288 the same way as an int. */ 289 #define AGGREGATE_PADDING_FIXED TARGET_64BIT 290 #define AGGREGATES_PAD_UPWARD_ALWAYS 0 291 292 /* Specify padding for the last element of a block move between 293 registers and memory. FIRST is nonzero if this is the only 294 element. */ 295 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ 296 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE)) 297 298 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit 299 process. */ 300 #define OS_MISSING_POWERPC64 !TARGET_64BIT 301 302 #ifdef SINGLE_LIBC 303 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) 304 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) 305 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) 306 #else 307 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 308 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) 309 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) 310 #endif 311 312 /* Determine what functions are present at the runtime; 313 this includes full c99 runtime and sincos. */ 314 #undef TARGET_LIBC_HAS_FUNCTION 315 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function 316 317 #undef TARGET_OS_CPP_BUILTINS 318 #define TARGET_OS_CPP_BUILTINS() \ 319 do \ 320 { \ 321 if (TARGET_64BIT) \ 322 { \ 323 builtin_define ("__PPC__"); \ 324 builtin_define ("__PPC64__"); \ 325 builtin_define ("__powerpc__"); \ 326 builtin_define ("__powerpc64__"); \ 327 if (!DOT_SYMBOLS) \ 328 builtin_define ("_CALL_LINUX"); \ 329 builtin_assert ("cpu=powerpc64"); \ 330 builtin_assert ("machine=powerpc64"); \ 331 } \ 332 else \ 333 { \ 334 builtin_define_std ("PPC"); \ 335 builtin_define_std ("powerpc"); \ 336 builtin_assert ("cpu=powerpc"); \ 337 builtin_assert ("machine=powerpc"); \ 338 TARGET_OS_SYSV_CPP_BUILTINS (); \ 339 } \ 340 } \ 341 while (0) 342 343 #undef CPP_OS_DEFAULT_SPEC 344 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" 345 346 /* The GNU C++ standard library currently requires _GNU_SOURCE being 347 defined on glibc-based systems. This temporary hack accomplishes this, 348 it should go away as soon as libstdc++-v3 has a real fix. */ 349 #undef CPLUSPLUS_CPP_SPEC 350 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 351 352 #undef LINK_SHLIB_SPEC 353 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 354 355 #undef LIB_DEFAULT_SPEC 356 #define LIB_DEFAULT_SPEC "%(lib_linux)" 357 358 #undef STARTFILE_DEFAULT_SPEC 359 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 360 361 #undef ENDFILE_DEFAULT_SPEC 362 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 363 364 #undef LINK_START_DEFAULT_SPEC 365 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 366 367 #undef LINK_OS_DEFAULT_SPEC 368 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 369 370 #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1" 371 #ifdef LINUX64_DEFAULT_ABI_ELFv2 372 #define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv1:/lib64/ld64.so.1;:/lib64/ld64.so.2}" 373 #else 374 #define GLIBC_DYNAMIC_LINKER64 "%{mabi=elfv2:/lib64/ld64.so.2;:/lib64/ld64.so.1}" 375 #endif 376 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" 377 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" 378 #if DEFAULT_LIBC == LIBC_UCLIBC 379 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}" 380 #elif DEFAULT_LIBC == LIBC_GLIBC 381 #define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}" 382 #else 383 #error "Unsupported DEFAULT_LIBC" 384 #endif 385 #define GNU_USER_DYNAMIC_LINKER32 \ 386 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32) 387 #define GNU_USER_DYNAMIC_LINKER64 \ 388 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64) 389 390 #undef DEFAULT_ASM_ENDIAN 391 #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) 392 #define DEFAULT_ASM_ENDIAN " -mlittle" 393 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 394 " -m elf32lppclinux", \ 395 " -m elf32lppclinux") 396 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 397 " -m elf64lppc", \ 398 " -m elf64lppc") 399 #else 400 #define DEFAULT_ASM_ENDIAN " -mbig" 401 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 402 " -m elf32lppclinux", \ 403 " -m elf32ppclinux") 404 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 405 " -m elf64lppc", \ 406 " -m elf64ppc") 407 #endif 408 409 #define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \ 410 %{rdynamic:-export-dynamic} \ 411 -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}" 412 413 #define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \ 414 %{rdynamic:-export-dynamic} \ 415 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}" 416 417 #undef TOC_SECTION_ASM_OP 418 #define TOC_SECTION_ASM_OP \ 419 (TARGET_64BIT \ 420 ? "\t.section\t\".toc\",\"aw\"" \ 421 : "\t.section\t\".got\",\"aw\"") 422 423 #undef MINIMAL_TOC_SECTION_ASM_OP 424 #define MINIMAL_TOC_SECTION_ASM_OP \ 425 (TARGET_64BIT \ 426 ? "\t.section\t\".toc1\",\"aw\"" \ 427 : ((TARGET_RELOCATABLE || flag_pic) \ 428 ? "\t.section\t\".got2\",\"aw\"" \ 429 : "\t.section\t\".got1\",\"aw\"")) 430 431 /* Must be at least as big as our pointer type. */ 432 #undef SIZE_TYPE 433 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 434 435 #undef PTRDIFF_TYPE 436 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 437 438 #undef WCHAR_TYPE 439 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int") 440 #undef WCHAR_TYPE_SIZE 441 #define WCHAR_TYPE_SIZE 32 442 443 /* Override rs6000.h definition. */ 444 #undef ASM_APP_ON 445 #define ASM_APP_ON "#APP\n" 446 447 /* Override rs6000.h definition. */ 448 #undef ASM_APP_OFF 449 #define ASM_APP_OFF "#NO_APP\n" 450 451 #undef RS6000_MCOUNT 452 #define RS6000_MCOUNT "_mcount" 453 454 #ifdef __powerpc64__ 455 /* _init and _fini functions are built from bits spread across many 456 object files, each potentially with a different TOC pointer. For 457 that reason, place a nop after the call so that the linker can 458 restore the TOC pointer if a TOC adjusting call stub is needed. */ 459 #if DOT_SYMBOLS 460 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 461 asm (SECTION_OP "\n" \ 462 " bl ." #FUNC "\n" \ 463 " nop\n" \ 464 " .previous"); 465 #else 466 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 467 asm (SECTION_OP "\n" \ 468 " bl " #FUNC "\n" \ 469 " nop\n" \ 470 " .previous"); 471 #endif 472 #endif 473 474 /* FP save and restore routines. */ 475 #undef SAVE_FP_PREFIX 476 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_") 477 #undef SAVE_FP_SUFFIX 478 #define SAVE_FP_SUFFIX "" 479 #undef RESTORE_FP_PREFIX 480 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_") 481 #undef RESTORE_FP_SUFFIX 482 #define RESTORE_FP_SUFFIX "" 483 484 /* Dwarf2 debugging. */ 485 #undef PREFERRED_DEBUGGING_TYPE 486 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 487 488 /* This is how to declare the size of a function. */ 489 #undef ASM_DECLARE_FUNCTION_SIZE 490 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 491 do \ 492 { \ 493 if (!flag_inhibit_size_directive) \ 494 { \ 495 fputs ("\t.size\t", (FILE)); \ 496 if (TARGET_64BIT && DOT_SYMBOLS) \ 497 putc ('.', (FILE)); \ 498 assemble_name ((FILE), (FNAME)); \ 499 fputs (",.-", (FILE)); \ 500 rs6000_output_function_entry (FILE, FNAME); \ 501 putc ('\n', (FILE)); \ 502 } \ 503 } \ 504 while (0) 505 506 /* Return nonzero if this entry is to be written into the constant 507 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF 508 or a CONST containing one of them. If -mfp-in-toc (the default), 509 we also do this for floating-point constants. We actually can only 510 do this if the FP formats of the target and host machines are the 511 same, but we can't check that since not every file that uses 512 the macros includes real.h. We also do this when we can write the 513 entry into the TOC and the entry is not larger than a TOC entry. */ 514 515 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P 516 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \ 517 (TARGET_TOC \ 518 && (GET_CODE (X) == SYMBOL_REF \ 519 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 520 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \ 521 || GET_CODE (X) == LABEL_REF \ 522 || (GET_CODE (X) == CONST_INT \ 523 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \ 524 || (GET_CODE (X) == CONST_DOUBLE \ 525 && ((TARGET_64BIT \ 526 && (TARGET_MINIMAL_TOC \ 527 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \ 528 && ! TARGET_NO_FP_IN_TOC))) \ 529 || (!TARGET_64BIT \ 530 && !TARGET_NO_FP_IN_TOC \ 531 && !TARGET_RELOCATABLE \ 532 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \ 533 && BITS_PER_WORD == HOST_BITS_PER_INT))))) 534 535 /* Select a format to encode pointers in exception handling data. CODE 536 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is 537 true if the symbol may be affected by dynamic relocations. */ 538 #undef ASM_PREFERRED_EH_DATA_FORMAT 539 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ 540 ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE) \ 541 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \ 542 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \ 543 : DW_EH_PE_absptr) 544 545 /* For backward compatibility, we must continue to use the AIX 546 structure return convention. */ 547 #undef DRAFT_V4_STRUCT_RET 548 #define DRAFT_V4_STRUCT_RET (!TARGET_64BIT) 549 550 #define TARGET_POSIX_IO 551 552 #define LINK_GCC_C_SEQUENCE_SPEC \ 553 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 554 555 /* Use --as-needed -lgcc_s for eh support. */ 556 #ifdef HAVE_LD_AS_NEEDED 557 #define USE_LD_AS_NEEDED 1 558 #endif 559 560 #ifdef TARGET_LIBC_PROVIDES_SSP 561 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2), 562 ppc64 glibc provides it at -0x7010(13). */ 563 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? -0x7010 : -0x7008) 564 #endif 565 566 #define POWERPC_LINUX 567 568 /* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later. */ 569 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 570 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 571 #endif 572 573 /* Static stack checking is supported by means of probes. */ 574 #define STACK_CHECK_STATIC_BUILTIN 1 575 576 /* The default value isn't sufficient in 64-bit mode. */ 577 #define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024) 578 579 /* Software floating point support for exceptions and rounding modes 580 depends on the C library in use. */ 581 #undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P 582 #define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \ 583 rs6000_linux_float_exceptions_rounding_supported_p 584