1 /* Definitions of target machine for GNU compiler, 2 for 64 bit PowerPC linux. 3 Copyright (C) 2000-2020 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 if (TARGET_PLTSEQ && DEFAULT_ABI != ABI_ELFv2) \ 159 { \ 160 if (global_options_set.x_rs6000_pltseq) \ 161 warning (0, "%qs unsupported for this ABI", \ 162 "-mpltseq"); \ 163 rs6000_pltseq = false; \ 164 } \ 165 } \ 166 else \ 167 { \ 168 if (!RS6000_BI_ARCH_P) \ 169 error (INVALID_32BIT, "32"); \ 170 if (TARGET_PROFILE_KERNEL) \ 171 { \ 172 TARGET_PROFILE_KERNEL = 0; \ 173 error (INVALID_32BIT, "profile-kernel"); \ 174 } \ 175 if (global_options_set.x_rs6000_current_cmodel) \ 176 { \ 177 SET_CMODEL (CMODEL_SMALL); \ 178 error (INVALID_32BIT, "cmodel"); \ 179 } \ 180 } \ 181 } \ 182 while (0) 183 184 #undef ASM_SPEC 185 #undef LINK_OS_LINUX_SPEC 186 #undef LINK_SECURE_PLT_SPEC 187 188 #ifndef RS6000_BI_ARCH 189 #define ASM_SPEC "%(asm_spec64) %(asm_spec_common)" 190 #define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)" 191 #define LINK_SECURE_PLT_SPEC "" 192 #else 193 #if DEFAULT_ARCH64_P 194 #define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)" 195 #define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}" 196 #define LINK_SECURE_PLT_SPEC "%{m32: " LINK_SECURE_PLT_DEFAULT_SPEC "}" 197 #else 198 #define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)" 199 #define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}" 200 #define LINK_SECURE_PLT_SPEC "%{!m64: " LINK_SECURE_PLT_DEFAULT_SPEC "}" 201 #endif 202 #endif 203 204 #define ASM_SPEC32 "-a32 \ 205 %{mrelocatable} %{mrelocatable-lib} %{" FPIE_OR_FPIC_SPEC ":-K PIC} \ 206 %{memb|msdata=eabi: -memb}" 207 208 #define ASM_SPEC64 "-a64" 209 210 #define ASM_SPEC_COMMON "%(asm_cpu) \ 211 %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}" \ 212 ENDIAN_SELECT(" -mbig", " -mlittle", DEFAULT_ASM_ENDIAN) 213 214 #undef SUBSUBTARGET_EXTRA_SPECS 215 #define SUBSUBTARGET_EXTRA_SPECS \ 216 { "asm_spec_common", ASM_SPEC_COMMON }, \ 217 { "asm_spec32", ASM_SPEC32 }, \ 218 { "asm_spec64", ASM_SPEC64 }, \ 219 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \ 220 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 }, \ 221 { "link_os_extra_spec32", LINK_OS_EXTRA_SPEC32 }, \ 222 { "link_os_extra_spec64", LINK_OS_EXTRA_SPEC64 }, \ 223 { "link_os_new_dtags", LINK_OS_NEW_DTAGS_SPEC }, \ 224 { "include_extra", INCLUDE_EXTRA_SPEC }, \ 225 { "dynamic_linker_prefix", DYNAMIC_LINKER_PREFIX }, 226 227 /* Optional specs used for overriding the system include directory, default 228 -rpath links, and prefix for the dynamic linker. Normally, there are not 229 defined, but if the user configure with the --with-advance-toolchain=<xxx> 230 option, the advance-toolchain.h file will override these. */ 231 #ifndef INCLUDE_EXTRA_SPEC 232 #define INCLUDE_EXTRA_SPEC "" 233 #endif 234 235 #ifndef LINK_OS_EXTRA_SPEC32 236 #define LINK_OS_EXTRA_SPEC32 "" 237 #endif 238 239 #ifndef LINK_OS_EXTRA_SPEC64 240 #define LINK_OS_EXTRA_SPEC64 "" 241 #endif 242 243 #ifndef LINK_OS_NEW_DTAGS_SPEC 244 #define LINK_OS_NEW_DTAGS_SPEC "" 245 #endif 246 247 #ifndef DYNAMIC_LINKER_PREFIX 248 #define DYNAMIC_LINKER_PREFIX "" 249 #endif 250 251 #undef MULTILIB_DEFAULTS 252 #if DEFAULT_ARCH64_P 253 #define MULTILIB_DEFAULTS { "m64" } 254 #else 255 #define MULTILIB_DEFAULTS { "m32" } 256 #endif 257 258 /* Split stack is only supported for 64 bit, and requires glibc >= 2.18. */ 259 #if TARGET_GLIBC_MAJOR * 1000 + TARGET_GLIBC_MINOR >= 2018 260 # ifndef RS6000_BI_ARCH 261 # define TARGET_CAN_SPLIT_STACK 262 # else 263 # if DEFAULT_ARCH64_P 264 /* Supported, and the default is -m64 */ 265 # define TARGET_CAN_SPLIT_STACK_64BIT 1 266 # else 267 /* Supported, and the default is -m32 */ 268 # define TARGET_CAN_SPLIT_STACK_64BIT 0 269 # endif 270 # endif 271 #endif 272 273 #ifndef RS6000_BI_ARCH 274 275 /* 64-bit PowerPC Linux always has a TOC. */ 276 #undef TARGET_HAS_TOC 277 #define TARGET_HAS_TOC 1 278 279 /* Some things from sysv4.h we don't do when 64 bit. */ 280 #undef OPTION_RELOCATABLE 281 #define OPTION_RELOCATABLE 0 282 #undef OPTION_EABI 283 #define OPTION_EABI 0 284 #undef OPTION_PROTOTYPE 285 #define OPTION_PROTOTYPE 0 286 #undef RELOCATABLE_NEEDS_FIXUP 287 #define RELOCATABLE_NEEDS_FIXUP 0 288 289 #endif 290 291 /* We use glibc _mcount for profiling. */ 292 #define NO_PROFILE_COUNTERS 1 293 #define PROFILE_HOOK(LABEL) \ 294 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0) 295 296 /* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */ 297 #undef ADJUST_FIELD_ALIGN 298 #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \ 299 (rs6000_special_adjust_field_align_p ((TYPE), (COMPUTED)) \ 300 ? 128 \ 301 : (TARGET_64BIT \ 302 && TARGET_ALIGN_NATURAL == 0 \ 303 && TYPE_MODE (strip_array_types (TYPE)) == DFmode) \ 304 ? MIN ((COMPUTED), 32) \ 305 : (COMPUTED)) 306 307 /* PowerPC64 Linux increases natural record alignment to doubleword if 308 the first field is an FP double, only if in power alignment mode. */ 309 #undef ROUND_TYPE_ALIGN 310 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ 311 ((TARGET_64BIT \ 312 && (TREE_CODE (STRUCT) == RECORD_TYPE \ 313 || TREE_CODE (STRUCT) == UNION_TYPE \ 314 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ 315 && TARGET_ALIGN_NATURAL == 0) \ 316 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ 317 : MAX ((COMPUTED), (SPECIFIED))) 318 319 /* Use the default for compiling target libs. */ 320 #ifdef IN_TARGET_LIBS 321 #undef TARGET_ALIGN_NATURAL 322 #define TARGET_ALIGN_NATURAL 1 323 #endif 324 325 /* Indicate that jump tables go in the text section. */ 326 #undef JUMP_TABLES_IN_TEXT_SECTION 327 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT 328 329 /* The linux ppc64 ABI isn't explicit on whether aggregates smaller 330 than a doubleword should be padded upward or downward. You could 331 reasonably assume that they follow the normal rules for structure 332 layout treating the parameter area as any other block of memory, 333 then map the reg param area to registers. i.e. pad upward. 334 Setting both of the following defines results in this behavior. 335 Setting just the first one will result in aggregates that fit in a 336 doubleword being padded downward, and others being padded upward. 337 Not a bad idea as this results in struct { int x; } being passed 338 the same way as an int. */ 339 #define AGGREGATE_PADDING_FIXED TARGET_64BIT 340 #define AGGREGATES_PAD_UPWARD_ALWAYS 0 341 342 /* Specify padding for the last element of a block move between 343 registers and memory. FIRST is nonzero if this is the only 344 element. */ 345 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ 346 (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE)) 347 348 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit 349 process. */ 350 #define OS_MISSING_POWERPC64 !TARGET_64BIT 351 352 #ifdef SINGLE_LIBC 353 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) 354 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) 355 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) 356 #undef OPTION_MUSL 357 #define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL) 358 #else 359 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 360 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) 361 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) 362 #undef OPTION_MUSL 363 #define OPTION_MUSL (linux_libc == LIBC_MUSL) 364 #endif 365 366 /* Determine what functions are present at the runtime; 367 this includes full c99 runtime and sincos. */ 368 #undef TARGET_LIBC_HAS_FUNCTION 369 #define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function 370 371 #undef TARGET_OS_CPP_BUILTINS 372 #define TARGET_OS_CPP_BUILTINS() \ 373 do \ 374 { \ 375 if (strcmp (rs6000_abi_name, "linux") == 0 \ 376 || strcmp (rs6000_abi_name, "aixdesc") == 0) \ 377 GNU_USER_TARGET_OS_CPP_BUILTINS(); \ 378 if (TARGET_64BIT) \ 379 { \ 380 builtin_define ("__PPC__"); \ 381 builtin_define ("__PPC64__"); \ 382 builtin_define ("__powerpc__"); \ 383 builtin_define ("__powerpc64__"); \ 384 if (!DOT_SYMBOLS) \ 385 builtin_define ("_CALL_LINUX"); \ 386 builtin_assert ("cpu=powerpc64"); \ 387 builtin_assert ("machine=powerpc64"); \ 388 } \ 389 else \ 390 { \ 391 builtin_define_std ("PPC"); \ 392 builtin_define_std ("powerpc"); \ 393 builtin_assert ("cpu=powerpc"); \ 394 builtin_assert ("machine=powerpc"); \ 395 TARGET_OS_SYSV_CPP_BUILTINS (); \ 396 } \ 397 } \ 398 while (0) 399 400 #undef CPP_OS_DEFAULT_SPEC 401 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux) %(include_extra)" 402 403 #undef LINK_SHLIB_SPEC 404 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}} \ 405 %{static-pie:-static -pie --no-dynamic-linker -z text}" 406 407 #undef LIB_DEFAULT_SPEC 408 #define LIB_DEFAULT_SPEC "%(lib_linux)" 409 410 #undef STARTFILE_DEFAULT_SPEC 411 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 412 413 #undef ENDFILE_DEFAULT_SPEC 414 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 415 416 #undef LINK_START_DEFAULT_SPEC 417 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 418 419 #undef LINK_OS_DEFAULT_SPEC 420 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 421 422 #define GLIBC_DYNAMIC_LINKER32 "%(dynamic_linker_prefix)/lib/ld.so.1" 423 424 #ifdef LINUX64_DEFAULT_ABI_ELFv2 425 #define GLIBC_DYNAMIC_LINKER64 \ 426 "%{mabi=elfv1:%(dynamic_linker_prefix)/lib64/ld64.so.1;" \ 427 ":%(dynamic_linker_prefix)/lib64/ld64.so.2}" 428 #else 429 #define GLIBC_DYNAMIC_LINKER64 \ 430 "%{mabi=elfv2:%(dynamic_linker_prefix)/lib64/ld64.so.2;" \ 431 ":%(dynamic_linker_prefix)/lib64/ld64.so.1}" 432 #endif 433 434 #undef MUSL_DYNAMIC_LINKER32 435 #define MUSL_DYNAMIC_LINKER32 \ 436 "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1" 437 #undef MUSL_DYNAMIC_LINKER64 438 #define MUSL_DYNAMIC_LINKER64 \ 439 "/lib/ld-musl-powerpc64" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1" 440 441 #undef DEFAULT_ASM_ENDIAN 442 #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) 443 #define DEFAULT_ASM_ENDIAN " -mlittle" 444 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 445 " -m elf32lppclinux", \ 446 " -m elf32lppclinux") 447 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 448 " -m elf64lppc", \ 449 " -m elf64lppc") 450 #else 451 #define DEFAULT_ASM_ENDIAN " -mbig" 452 #define LINK_OS_LINUX_EMUL32 ENDIAN_SELECT(" -m elf32ppclinux", \ 453 " -m elf32lppclinux", \ 454 " -m elf32ppclinux") 455 #define LINK_OS_LINUX_EMUL64 ENDIAN_SELECT(" -m elf64ppc", \ 456 " -m elf64lppc", \ 457 " -m elf64ppc") 458 #endif 459 460 #define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \ 461 %{!static-pie: \ 462 %{rdynamic:-export-dynamic} \ 463 -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}}} \ 464 %(link_os_extra_spec32)" 465 466 #define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \ 467 %{!static-pie: \ 468 %{rdynamic:-export-dynamic} \ 469 -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}}} \ 470 %(link_os_extra_spec64)" 471 472 /* Use gnu-user.h LINK_GCC_SEQUENCE_SPEC for linux. */ 473 #undef LINK_GCC_C_SEQUENCE_SPEC 474 #define LINK_GCC_C_SEQUENCE_SPEC \ 475 "%{mads|myellowknife|mmvme|msim:%G %L %G;" \ 476 "!mcall-*|mcall-linux:" GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC ";" \ 477 ":%G %L %G}" 478 479 #undef TOC_SECTION_ASM_OP 480 #define TOC_SECTION_ASM_OP \ 481 (TARGET_64BIT \ 482 ? "\t.section\t\".toc\",\"aw\"" \ 483 : "\t.section\t\".got\",\"aw\"") 484 485 #undef MINIMAL_TOC_SECTION_ASM_OP 486 #define MINIMAL_TOC_SECTION_ASM_OP \ 487 (TARGET_64BIT \ 488 ? "\t.section\t\".toc1\",\"aw\"" \ 489 : (flag_pic \ 490 ? "\t.section\t\".got2\",\"aw\"" \ 491 : "\t.section\t\".got1\",\"aw\"")) 492 493 /* Must be at least as big as our pointer type. */ 494 #undef SIZE_TYPE 495 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 496 497 #undef PTRDIFF_TYPE 498 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 499 500 #undef WCHAR_TYPE 501 #define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int") 502 #undef WCHAR_TYPE_SIZE 503 #define WCHAR_TYPE_SIZE 32 504 505 #undef RS6000_MCOUNT 506 #define RS6000_MCOUNT "_mcount" 507 508 #ifdef __powerpc64__ 509 /* _init and _fini functions are built from bits spread across many 510 object files, each potentially with a different TOC pointer. For 511 that reason, place a nop after the call so that the linker can 512 restore the TOC pointer if a TOC adjusting call stub is needed. */ 513 #if DOT_SYMBOLS 514 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 515 asm (SECTION_OP "\n" \ 516 " bl ." #FUNC "\n" \ 517 " nop\n" \ 518 " .previous"); 519 #else 520 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 521 asm (SECTION_OP "\n" \ 522 " bl " #FUNC "\n" \ 523 " nop\n" \ 524 " .previous"); 525 #endif 526 #endif 527 528 /* FP save and restore routines. */ 529 #undef SAVE_FP_PREFIX 530 #define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_") 531 #undef SAVE_FP_SUFFIX 532 #define SAVE_FP_SUFFIX "" 533 #undef RESTORE_FP_PREFIX 534 #define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_") 535 #undef RESTORE_FP_SUFFIX 536 #define RESTORE_FP_SUFFIX "" 537 538 /* Dwarf2 debugging. */ 539 #undef PREFERRED_DEBUGGING_TYPE 540 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 541 542 /* This is how to declare the size of a function. */ 543 #undef ASM_DECLARE_FUNCTION_SIZE 544 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 545 do \ 546 { \ 547 if (!flag_inhibit_size_directive) \ 548 { \ 549 fputs ("\t.size\t", (FILE)); \ 550 if (TARGET_64BIT && DOT_SYMBOLS) \ 551 putc ('.', (FILE)); \ 552 assemble_name ((FILE), (FNAME)); \ 553 fputs (",.-", (FILE)); \ 554 rs6000_output_function_entry (FILE, FNAME); \ 555 putc ('\n', (FILE)); \ 556 } \ 557 } \ 558 while (0) 559 560 /* Return nonzero if this entry is to be written into the constant 561 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF 562 or a CONST containing one of them. If -mfp-in-toc (the default), 563 we also do this for floating-point constants. We actually can only 564 do this if the FP formats of the target and host machines are the 565 same, but we can't check that since not every file that uses 566 the macros includes real.h. We also do this when we can write an 567 integer into the TOC and the entry is not larger than a TOC entry, 568 but not for -mcmodel=medium where we'll use a toc-relative load for 569 constants outside the TOC. */ 570 571 #undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P 572 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \ 573 (TARGET_TOC \ 574 && (SYMBOL_REF_P (X) \ 575 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 576 && SYMBOL_REF_P (XEXP (XEXP (X, 0), 0))) \ 577 || GET_CODE (X) == LABEL_REF \ 578 || (CONST_INT_P (X) \ 579 && TARGET_CMODEL != CMODEL_MEDIUM \ 580 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \ 581 || (CONST_DOUBLE_P (X) \ 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 1 643 644 /* Enable using prefixed PC-relative addressing on POWER10 if the ABI 645 supports it. The ELF v2 ABI only supports PC-relative relocations for 646 the medium code model. */ 647 #define PCREL_SUPPORTED_BY_OS (TARGET_POWER10 && TARGET_PREFIXED \ 648 && ELFv2_ABI_CHECK \ 649 && TARGET_CMODEL == CMODEL_MEDIUM) 650