1 /* Definitions of target machine for GNU compiler, 2 for 64 bit PowerPC linux. 3 Copyright (C) 2000-2018 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 #undef TARGET_KEEP_LEAF_WHEN_PROFILED 63 #define TARGET_KEEP_LEAF_WHEN_PROFILED rs6000_keep_leaf_when_profiled 64 65 #define TARGET_USES_LINUX64_OPT 1 66 #ifdef HAVE_LD_LARGE_TOC 67 #undef TARGET_CMODEL 68 #define TARGET_CMODEL rs6000_current_cmodel 69 #define SET_CMODEL(opt) rs6000_current_cmodel = opt 70 #else 71 #define SET_CMODEL(opt) do {} while (0) 72 #endif 73 74 #undef PROCESSOR_DEFAULT 75 #define PROCESSOR_DEFAULT PROCESSOR_POWER7 76 #undef PROCESSOR_DEFAULT64 77 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER8 78 79 /* We don't need to generate entries in .fixup, except when 80 -mrelocatable or -mrelocatable-lib is given. */ 81 #undef RELOCATABLE_NEEDS_FIXUP 82 #define RELOCATABLE_NEEDS_FIXUP \ 83 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE) 84 85 #undef RS6000_ABI_NAME 86 #define RS6000_ABI_NAME "linux" 87 88 #define INVALID_64BIT "-m%s not supported in this configuration" 89 #define INVALID_32BIT INVALID_64BIT 90 91 #ifdef LINUX64_DEFAULT_ABI_ELFv2 92 #define ELFv2_ABI_CHECK (rs6000_elf_abi != 1) 93 #else 94 #define ELFv2_ABI_CHECK (rs6000_elf_abi == 2) 95 #endif 96 97 #undef SUBSUBTARGET_OVERRIDE_OPTIONS 98 #define SUBSUBTARGET_OVERRIDE_OPTIONS \ 99 do \ 100 { \ 101 if (!global_options_set.x_rs6000_alignment_flags) \ 102 rs6000_alignment_flags = MASK_ALIGN_NATURAL; \ 103 if (rs6000_isa_flags & OPTION_MASK_64BIT) \ 104 { \ 105 if (DEFAULT_ABI != ABI_AIX) \ 106 { \ 107 rs6000_current_abi = ABI_AIX; \ 108 error (INVALID_64BIT, "call"); \ 109 } \ 110 dot_symbols = !strcmp (rs6000_abi_name, "aixdesc"); \ 111 if (ELFv2_ABI_CHECK) \ 112 { \ 113 rs6000_current_abi = ABI_ELFv2; \ 114 if (dot_symbols) \ 115 error ("-mcall-aixdesc incompatible with -mabi=elfv2"); \ 116 } \ 117 if (rs6000_isa_flags & OPTION_MASK_RELOCATABLE) \ 118 { \ 119 rs6000_isa_flags &= ~OPTION_MASK_RELOCATABLE; \ 120 error (INVALID_64BIT, "relocatable"); \ 121 } \ 122 if (rs6000_isa_flags & OPTION_MASK_EABI) \ 123 { \ 124 rs6000_isa_flags &= ~OPTION_MASK_EABI; \ 125 error (INVALID_64BIT, "eabi"); \ 126 } \ 127 if (TARGET_PROTOTYPE) \ 128 { \ 129 target_prototype = 0; \ 130 error (INVALID_64BIT, "prototype"); \ 131 } \ 132 if ((rs6000_isa_flags & OPTION_MASK_POWERPC64) == 0) \ 133 { \ 134 rs6000_isa_flags |= OPTION_MASK_POWERPC64; \ 135 error ("-m64 requires a PowerPC64 cpu"); \ 136 } \ 137 if ((rs6000_isa_flags_explicit \ 138 & OPTION_MASK_MINIMAL_TOC) != 0) \ 139 { \ 140 if (global_options_set.x_rs6000_current_cmodel \ 141 && rs6000_current_cmodel != CMODEL_SMALL) \ 142 error ("-mcmodel incompatible with other toc options"); \ 143 SET_CMODEL (CMODEL_SMALL); \ 144 } \ 145 else \ 146 { \ 147 if (!global_options_set.x_rs6000_current_cmodel) \ 148 SET_CMODEL (CMODEL_MEDIUM); \ 149 if (rs6000_current_cmodel != CMODEL_SMALL) \ 150 { \ 151 if (!global_options_set.x_TARGET_NO_FP_IN_TOC) \ 152 TARGET_NO_FP_IN_TOC \ 153 = rs6000_current_cmodel == CMODEL_MEDIUM; \ 154 if (!global_options_set.x_TARGET_NO_SUM_IN_TOC) \ 155 TARGET_NO_SUM_IN_TOC = 0; \ 156 } \ 157 } \ 158 } \ 159 else \ 160 { \ 161 if (!RS6000_BI_ARCH_P) \ 162 error (INVALID_32BIT, "32"); \ 163 if (TARGET_PROFILE_KERNEL) \ 164 { \ 165 TARGET_PROFILE_KERNEL = 0; \ 166 error (INVALID_32BIT, "profile-kernel"); \ 167 } \ 168 if (global_options_set.x_rs6000_current_cmodel) \ 169 { \ 170 SET_CMODEL (CMODEL_SMALL); \ 171 error (INVALID_32BIT, "cmodel"); \ 172 } \ 173 } \ 174 } \ 175 while (0) 176 177 #undef ASM_DEFAULT_SPEC 178 #undef ASM_SPEC 179 #undef LINK_OS_LINUX_SPEC 180 #undef LINK_SECURE_PLT_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 #define LINK_SECURE_PLT_SPEC "" 187 #else 188 #if DEFAULT_ARCH64_P 189 #define ASM_DEFAULT_SPEC "-mppc%{!m32:64}" 190 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)" 191 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}" 192 #define LINK_SECURE_PLT_SPEC "%{m32: " LINK_SECURE_PLT_DEFAULT_SPEC "}" 193 #else 194 #define ASM_DEFAULT_SPEC "-mppc%{m64:64}" 195 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)" 196 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}" 197 #define LINK_SECURE_PLT_SPEC "%{!m64: " LINK_SECURE_PLT_DEFAULT_SPEC "}" 198 #endif 199 #endif 200 201 #define ASM_SPEC32 "-a32 \ 202 %{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \ 203 %{memb|msdata=eabi: -memb}" 204 205 #define ASM_SPEC64 "-a64" 206 207 #define ASM_SPEC_COMMON "%(asm_cpu) \ 208 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \ 209 ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN) 210 211 #undef SUBSUBTARGET_EXTRA_SPECS 212 #define SUBSUBTARGET_EXTRA_SPECS \ 213 { "asm_spec_common", ASM_SPEC_COMMON }, \ 214 { "asm_spec32", ASM_SPEC32 }, \ 215 { "asm_spec64", ASM_SPEC64 }, \ 216 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \ 217 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 }, \ 218 { "link_os_extra_spec32", LINK_OS_EXTRA_SPEC32 }, \ 219 { "link_os_extra_spec64", LINK_OS_EXTRA_SPEC64 }, \ 220 { "link_os_new_dtags", LINK_OS_NEW_DTAGS_SPEC }, \ 221 { "include_extra", INCLUDE_EXTRA_SPEC }, \ 222 { "dynamic_linker_prefix", DYNAMIC_LINKER_PREFIX }, 223 224 /* Optional specs used for overriding the system include directory, default 225 -rpath links, and prefix for the dynamic linker. Normally, there are not 226 defined, but if the user configure with the --with-advance-toolchain=<xxx> 227 option, the advance-toolchain.h file will override these. */ 228 #ifndef INCLUDE_EXTRA_SPEC 229 #define INCLUDE_EXTRA_SPEC "" 230 #endif 231 232 #ifndef LINK_OS_EXTRA_SPEC32 233 #define LINK_OS_EXTRA_SPEC32 "" 234 #endif 235 236 #ifndef LINK_OS_EXTRA_SPEC64 237 #define LINK_OS_EXTRA_SPEC64 "" 238 #endif 239 240 #ifndef LINK_OS_NEW_DTAGS_SPEC 241 #define LINK_OS_NEW_DTAGS_SPEC "" 242 #endif 243 244 #ifndef DYNAMIC_LINKER_PREFIX 245 #define DYNAMIC_LINKER_PREFIX "" 246 #endif 247 248 #undef MULTILIB_DEFAULTS 249 #if DEFAULT_ARCH64_P 250 #define MULTILIB_DEFAULTS { "m64" } 251 #else 252 #define MULTILIB_DEFAULTS { "m32" } 253 #endif 254 255 /* Split stack is only supported for 64 bit, and requires glibc >= 2.18. */ 256 #if TARGET_GLIBC_MAJOR * 1000 + TARGET_GLIBC_MINOR >= 2018 257 # ifndef RS6000_BI_ARCH 258 # define TARGET_CAN_SPLIT_STACK 259 # else 260 # if DEFAULT_ARCH64_P 261 /* Supported, and the default is -m64 */ 262 # define TARGET_CAN_SPLIT_STACK_64BIT 1 263 # else 264 /* Supported, and the default is -m32 */ 265 # define TARGET_CAN_SPLIT_STACK_64BIT 0 266 # endif 267 # endif 268 #endif 269 270 #ifndef RS6000_BI_ARCH 271 272 /* 64-bit PowerPC Linux always has a TOC. */ 273 #undef TARGET_TOC 274 #define TARGET_TOC 1 275 276 /* Some things from sysv4.h we don't do when 64 bit. */ 277 #undef OPTION_RELOCATABLE 278 #define OPTION_RELOCATABLE 0 279 #undef OPTION_EABI 280 #define OPTION_EABI 0 281 #undef OPTION_PROTOTYPE 282 #define OPTION_PROTOTYPE 0 283 #undef RELOCATABLE_NEEDS_FIXUP 284 #define RELOCATABLE_NEEDS_FIXUP 0 285 286 #endif 287 288 /* We use glibc _mcount for profiling. */ 289 #define NO_PROFILE_COUNTERS 1 290 #define PROFILE_HOOK(LABEL) \ 291 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0) 292 293 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */ 294 #undef ADJUST_FIELD_ALIGN 295 #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \ 296 (rs6000_special_adjust_field_align_p ((TYPE), (COMPUTED)) \ 297 ? 128 \ 298 : (TARGET_64BIT \ 299 && TARGET_ALIGN_NATURAL == 0 \ 300 && TYPE_MODE (strip_array_types (TYPE)) == DFmode) \ 301 ? MIN ((COMPUTED), 32) \ 302 : (COMPUTED)) 303 304 /* PowerPC64 Linux increases natural record alignment to doubleword if 305 the first field is an FP double, only if in power alignment mode. */ 306 #undef ROUND_TYPE_ALIGN 307 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ 308 ((TARGET_64BIT \ 309 && (TREE_CODE (STRUCT) == RECORD_TYPE \ 310 || TREE_CODE (STRUCT) == UNION_TYPE \ 311 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ 312 && TARGET_ALIGN_NATURAL == 0) \ 313 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ 314 : MAX ((COMPUTED), (SPECIFIED))) 315 316 /* Use the default for compiling target libs. */ 317 #ifdef IN_TARGET_LIBS 318 #undef TARGET_ALIGN_NATURAL 319 #define TARGET_ALIGN_NATURAL 1 320 #endif 321 322 /* Indicate that jump tables go in the text section. */ 323 #undef JUMP_TABLES_IN_TEXT_SECTION 324 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT 325 326 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller 327 than a doubleword should be padded upward or downward. You could 328 reasonably assume that they follow the normal rules for structure 329 layout treating the parameter area as any other block of memory, 330 then map the reg param area to registers. i.e. pad upward. 331 Setting both of the following defines results in this behavior. 332 Setting just the first one will result in aggregates that fit in a 333 doubleword being padded downward, and others being padded upward. 334 Not a bad idea as this results in struct { int x; } being passed 335 the same way as an int. */ 336 #define AGGREGATE_PADDING_FIXED TARGET_64BIT 337 #define AGGREGATES_PAD_UPWARD_ALWAYS 0 338 339 /* Specify padding for the last element of a block move between 340 registers and memory. FIRST is nonzero if this is the only 341 element. */ 342 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ 343 (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE)) 344 345 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit 346 process. */ 347 #define OS_MISSING_POWERPC64 !TARGET_64BIT 348 349 #ifdef SINGLE_LIBC 350 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) 351 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) 352 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) 353 #undef OPTION_MUSL 354 #define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL) 355 #else 356 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 357 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) 358 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) 359 #undef OPTION_MUSL 360 #define OPTION_MUSL (linux_libc == LIBC_MUSL) 361 #endif 362 363 /* Determine what functions are present at the runtime; 364 this includes full c99 runtime and sincos. */ 365 #undef TARGET_LIBC_HAS_FUNCTION 366 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function 367 368 #undef TARGET_OS_CPP_BUILTINS 369 #define TARGET_OS_CPP_BUILTINS() \ 370 do \ 371 { \ 372 if (TARGET_64BIT) \ 373 { \ 374 builtin_define ("__PPC__"); \ 375 builtin_define ("__PPC64__"); \ 376 builtin_define ("__powerpc__"); \ 377 builtin_define ("__powerpc64__"); \ 378 if (!DOT_SYMBOLS) \ 379 builtin_define ("_CALL_LINUX"); \ 380 builtin_assert ("cpu=powerpc64"); \ 381 builtin_assert ("machine=powerpc64"); \ 382 } \ 383 else \ 384 { \ 385 builtin_define_std ("PPC"); \ 386 builtin_define_std ("powerpc"); \ 387 builtin_assert ("cpu=powerpc"); \ 388 builtin_assert ("machine=powerpc"); \ 389 TARGET_OS_SYSV_CPP_BUILTINS (); \ 390 } \ 391 } \ 392 while (0) 393 394 #undef CPP_OS_DEFAULT_SPEC 395 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux) %(include_extra)" 396 397 #undef LINK_SHLIB_SPEC 398 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 399 400 #undef LIB_DEFAULT_SPEC 401 #define LIB_DEFAULT_SPEC "%(lib_linux)" 402 403 #undef STARTFILE_DEFAULT_SPEC 404 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 405 406 #undef ENDFILE_DEFAULT_SPEC 407 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 408 409 #undef LINK_START_DEFAULT_SPEC 410 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 411 412 #undef LINK_OS_DEFAULT_SPEC 413 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 414 415 #define GLIBC_DYNAMIC_LINKER32 "%(dynamic_linker_prefix)/lib/ld.so.1" 416 417 #ifdef LINUX64_DEFAULT_ABI_ELFv2 418 #define GLIBC_DYNAMIC_LINKER64 \ 419 "%{mabi=elfv1:%(dynamic_linker_prefix)/lib64/ld64.so.1;" \ 420 ":%(dynamic_linker_prefix)/lib64/ld64.so.2}" 421 #else 422 #define GLIBC_DYNAMIC_LINKER64 \ 423 "%{mabi=elfv2:%(dynamic_linker_prefix)/lib64/ld64.so.2;" \ 424 ":%(dynamic_linker_prefix)/lib64/ld64.so.1}" 425 #endif 426 427 #define MUSL_DYNAMIC_LINKER32 \ 428 "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1" 429 #define MUSL_DYNAMIC_LINKER64 \ 430 "/lib/ld-musl-powerpc64" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1" 431 432 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" 433 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" 434 #if DEFAULT_LIBC == LIBC_UCLIBC 435 #define CHOOSE_DYNAMIC_LINKER(G, U, M) \ 436 "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}" 437 #elif DEFAULT_LIBC == LIBC_GLIBC 438 #define CHOOSE_DYNAMIC_LINKER(G, U, M) \ 439 "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}" 440 #elif DEFAULT_LIBC == LIBC_MUSL 441 #define CHOOSE_DYNAMIC_LINKER(G, U, M) \ 442 "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}" 443 #else 444 #error "Unsupported DEFAULT_LIBC" 445 #endif 446 #define GNU_USER_DYNAMIC_LINKER32 \ 447 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \ 448 MUSL_DYNAMIC_LINKER32) 449 #define GNU_USER_DYNAMIC_LINKER64 \ 450 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \ 451 MUSL_DYNAMIC_LINKER64) 452 453 #undef DEFAULT_ASM_ENDIAN 454 #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) 455 #define DEFAULT_ASM_ENDIAN " -mlittle" 456 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 457 " -m elf32lppclinux", \ 458 " -m elf32lppclinux") 459 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 460 " -m elf64lppc", \ 461 " -m elf64lppc") 462 #else 463 #define DEFAULT_ASM_ENDIAN " -mbig" 464 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 465 " -m elf32lppclinux", \ 466 " -m elf32ppclinux") 467 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 468 " -m elf64lppc", \ 469 " -m elf64ppc") 470 #endif 471 472 #define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \ 473 %{rdynamic:-export-dynamic} \ 474 -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \ 475 %(link_os_extra_spec32)" 476 477 #define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \ 478 %{rdynamic:-export-dynamic} \ 479 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}} \ 480 %(link_os_extra_spec64)" 481 482 #undef TOC_SECTION_ASM_OP 483 #define TOC_SECTION_ASM_OP \ 484 (TARGET_64BIT \ 485 ? "\t.section\t\".toc\",\"aw\"" \ 486 : "\t.section\t\".got\",\"aw\"") 487 488 #undef MINIMAL_TOC_SECTION_ASM_OP 489 #define MINIMAL_TOC_SECTION_ASM_OP \ 490 (TARGET_64BIT \ 491 ? "\t.section\t\".toc1\",\"aw\"" \ 492 : (flag_pic \ 493 ? "\t.section\t\".got2\",\"aw\"" \ 494 : "\t.section\t\".got1\",\"aw\"")) 495 496 /* Must be at least as big as our pointer type. */ 497 #undef SIZE_TYPE 498 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 499 500 #undef PTRDIFF_TYPE 501 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 502 503 #undef WCHAR_TYPE 504 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int") 505 #undef WCHAR_TYPE_SIZE 506 #define WCHAR_TYPE_SIZE 32 507 508 #undef RS6000_MCOUNT 509 #define RS6000_MCOUNT "_mcount" 510 511 #ifdef __powerpc64__ 512 /* _init and _fini functions are built from bits spread across many 513 object files, each potentially with a different TOC pointer. For 514 that reason, place a nop after the call so that the linker can 515 restore the TOC pointer if a TOC adjusting call stub is needed. */ 516 #if DOT_SYMBOLS 517 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 518 asm (SECTION_OP "\n" \ 519 " bl ." #FUNC "\n" \ 520 " nop\n" \ 521 " .previous"); 522 #else 523 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 524 asm (SECTION_OP "\n" \ 525 " bl " #FUNC "\n" \ 526 " nop\n" \ 527 " .previous"); 528 #endif 529 #endif 530 531 /* FP save and restore routines. */ 532 #undef SAVE_FP_PREFIX 533 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_") 534 #undef SAVE_FP_SUFFIX 535 #define SAVE_FP_SUFFIX "" 536 #undef RESTORE_FP_PREFIX 537 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_") 538 #undef RESTORE_FP_SUFFIX 539 #define RESTORE_FP_SUFFIX "" 540 541 /* Dwarf2 debugging. */ 542 #undef PREFERRED_DEBUGGING_TYPE 543 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 544 545 /* This is how to declare the size of a function. */ 546 #undef ASM_DECLARE_FUNCTION_SIZE 547 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 548 do \ 549 { \ 550 if (!flag_inhibit_size_directive) \ 551 { \ 552 fputs ("\t.size\t", (FILE)); \ 553 if (TARGET_64BIT && DOT_SYMBOLS) \ 554 putc ('.', (FILE)); \ 555 assemble_name ((FILE), (FNAME)); \ 556 fputs (",.-", (FILE)); \ 557 rs6000_output_function_entry (FILE, FNAME); \ 558 putc ('\n', (FILE)); \ 559 } \ 560 } \ 561 while (0) 562 563 /* Return nonzero if this entry is to be written into the constant 564 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF 565 or a CONST containing one of them. If -mfp-in-toc (the default), 566 we also do this for floating-point constants. We actually can only 567 do this if the FP formats of the target and host machines are the 568 same, but we can't check that since not every file that uses 569 the macros includes real.h. We also do this when we can write the 570 entry into the TOC and the entry is not larger than a TOC entry. */ 571 572 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P 573 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \ 574 (TARGET_TOC \ 575 && (GET_CODE (X) == SYMBOL_REF \ 576 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 577 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \ 578 || GET_CODE (X) == LABEL_REF \ 579 || (GET_CODE (X) == CONST_INT \ 580 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \ 581 || (GET_CODE (X) == CONST_DOUBLE \ 582 && ((TARGET_64BIT \ 583 && (TARGET_MINIMAL_TOC \ 584 || (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \ 585 && ! TARGET_NO_FP_IN_TOC))) \ 586 || (!TARGET_64BIT \ 587 && !TARGET_NO_FP_IN_TOC \ 588 && SCALAR_FLOAT_MODE_P (GET_MODE (X)) \ 589 && BITS_PER_WORD == HOST_BITS_PER_INT))))) 590 591 /* Select a format to encode pointers in exception handling data. CODE 592 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is 593 true if the symbol may be affected by dynamic relocations. */ 594 #undef ASM_PREFERRED_EH_DATA_FORMAT 595 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ 596 (TARGET_64BIT || flag_pic \ 597 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \ 598 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \ 599 : DW_EH_PE_absptr) 600 601 /* For backward compatibility, we must continue to use the AIX 602 structure return convention. */ 603 #undef DRAFT_V4_STRUCT_RET 604 #define DRAFT_V4_STRUCT_RET (!TARGET_64BIT) 605 606 #ifdef TARGET_LIBC_PROVIDES_SSP 607 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2), 608 ppc64 glibc provides it at -0x7010(13). */ 609 #define TARGET_THREAD_SSP_OFFSET (TARGET_64BIT ? -0x7010 : -0x7008) 610 #endif 611 612 #define POWERPC_LINUX 613 614 /* ppc{32,64} linux has 128-bit long double support in glibc 2.4 and later. */ 615 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 616 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 617 #endif 618 619 /* Static stack checking is supported by means of probes. */ 620 #define STACK_CHECK_STATIC_BUILTIN 1 621 622 /* The default value isn't sufficient in 64-bit mode. */ 623 #define STACK_CHECK_PROTECT (TARGET_64BIT ? 16 * 1024 : 12 * 1024) 624 625 /* Software floating point support for exceptions and rounding modes 626 depends on the C library in use. */ 627 #undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P 628 #define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \ 629 rs6000_linux_float_exceptions_rounding_supported_p 630 631 /* Support for TARGET_ATOMIC_ASSIGN_EXPAND_FENV without FPRs depends 632 on glibc 2.19 or greater. */ 633 #if TARGET_GLIBC_MAJOR > 2 \ 634 || (TARGET_GLIBC_MAJOR == 2 && TARGET_GLIBC_MINOR >= 19) 635 #define RS6000_GLIBC_ATOMIC_FENV 1 636 #endif 637 638 /* The IEEE 128-bit emulator is only built on Linux systems. Flag that we 639 should enable the type handling for KFmode on VSX systems even if we are not 640 enabling the __float128 keyword. */ 641 #undef TARGET_FLOAT128_ENABLE_TYPE 642 #define TARGET_FLOAT128_ENABLE_TYPE 1 643