linux64.h revision 132718
1/* Definitions of target machine for GNU compiler, 2 for 64 bit PowerPC linux. 3 Copyright (C) 2000, 2001, 2002, 2003, 2004 4 Free Software Foundation, Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published 10 by the Free Software Foundation; either version 2, or (at your 11 option) any later version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 16 License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING. If not, write to the 20 Free Software Foundation, 59 Temple Place - Suite 330, Boston, 21 MA 02111-1307, USA. */ 22 23#ifndef RS6000_BI_ARCH 24 25#undef DEFAULT_ABI 26#define DEFAULT_ABI ABI_AIX 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#undef PROCESSOR_DEFAULT64 54#define PROCESSOR_DEFAULT64 PROCESSOR_PPC630 55 56#undef TARGET_RELOCATABLE 57#define TARGET_RELOCATABLE (!TARGET_64BIT && (target_flags & MASK_RELOCATABLE)) 58 59#undef RS6000_ABI_NAME 60#define RS6000_ABI_NAME (TARGET_64BIT ? "aixdesc" : "sysv") 61 62#define INVALID_64BIT "-m%s not supported in this configuration" 63#define INVALID_32BIT INVALID_64BIT 64 65#undef SUBSUBTARGET_OVERRIDE_OPTIONS 66#define SUBSUBTARGET_OVERRIDE_OPTIONS \ 67 do \ 68 { \ 69 if (rs6000_alignment_string == 0) \ 70 rs6000_alignment_flags = MASK_ALIGN_NATURAL; \ 71 if (TARGET_64BIT) \ 72 { \ 73 if (DEFAULT_ABI != ABI_AIX) \ 74 { \ 75 rs6000_current_abi = ABI_AIX; \ 76 error (INVALID_64BIT, "call"); \ 77 } \ 78 if (target_flags & MASK_RELOCATABLE) \ 79 { \ 80 target_flags &= ~MASK_RELOCATABLE; \ 81 error (INVALID_64BIT, "relocatable"); \ 82 } \ 83 if (target_flags & MASK_EABI) \ 84 { \ 85 target_flags &= ~MASK_EABI; \ 86 error (INVALID_64BIT, "eabi"); \ 87 } \ 88 if (target_flags & MASK_PROTOTYPE) \ 89 { \ 90 target_flags &= ~MASK_PROTOTYPE; \ 91 error (INVALID_64BIT, "prototype"); \ 92 } \ 93 if ((target_flags & MASK_POWERPC64) == 0) \ 94 { \ 95 target_flags |= MASK_POWERPC64; \ 96 error ("-m64 requires a PowerPC64 cpu"); \ 97 } \ 98 } \ 99 else \ 100 { \ 101 if (!RS6000_BI_ARCH_P) \ 102 error (INVALID_32BIT, "32"); \ 103 if (TARGET_PROFILE_KERNEL) \ 104 { \ 105 target_flags &= ~MASK_PROFILE_KERNEL; \ 106 error (INVALID_32BIT, "profile-kernel"); \ 107 } \ 108 } \ 109 } \ 110 while (0) 111 112#ifdef RS6000_BI_ARCH 113 114#undef OVERRIDE_OPTIONS 115#define OVERRIDE_OPTIONS \ 116 rs6000_override_options (((TARGET_DEFAULT ^ target_flags) & MASK_64BIT) \ 117 ? (char *) 0 : TARGET_CPU_DEFAULT) 118 119#endif 120 121#undef ASM_DEFAULT_SPEC 122#undef ASM_SPEC 123#undef LINK_OS_LINUX_SPEC 124 125#ifndef RS6000_BI_ARCH 126#define ASM_DEFAULT_SPEC "-mppc64" 127#define ASM_SPEC "%(asm_spec64) %(asm_spec_common)" 128#define LINK_OS_LINUX_SPEC "%(link_os_linux_spec64)" 129#else 130#if DEFAULT_ARCH64_P 131#define ASM_DEFAULT_SPEC "-mppc%{!m32:64}" 132#define ASM_SPEC "%{m32:%(asm_spec32)}%{!m32:%(asm_spec64)} %(asm_spec_common)" 133#define LINK_OS_LINUX_SPEC "%{m32:%(link_os_linux_spec32)}%{!m32:%(link_os_linux_spec64)}" 134#else 135#define ASM_DEFAULT_SPEC "-mppc%{m64:64}" 136#define ASM_SPEC "%{!m64:%(asm_spec32)}%{m64:%(asm_spec64)} %(asm_spec_common)" 137#define LINK_OS_LINUX_SPEC "%{!m64:%(link_os_linux_spec32)}%{m64:%(link_os_linux_spec64)}" 138#endif 139#endif 140 141#define ASM_SPEC32 "-a32 %{n} %{T} %{Ym,*} %{Yd,*} \ 142%{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} \ 143%{memb} %{!memb: %{msdata: -memb} %{msdata=eabi: -memb}} \ 144%{!mlittle: %{!mlittle-endian: %{!mbig: %{!mbig-endian: \ 145 %{mcall-freebsd: -mbig} \ 146 %{mcall-i960-old: -mlittle} \ 147 %{mcall-linux: -mbig} \ 148 %{mcall-gnu: -mbig} \ 149 %{mcall-netbsd: -mbig} \ 150}}}}" 151 152#define ASM_SPEC64 "-a64" 153 154#define ASM_SPEC_COMMON "%(asm_cpu) \ 155%{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \ 156%{v:-V} %{Qy:} %{!Qn:-Qy} %{Wa,*:%*} \ 157%{mlittle} %{mlittle-endian} %{mbig} %{mbig-endian}" 158 159#undef SUBSUBTARGET_EXTRA_SPECS 160#define SUBSUBTARGET_EXTRA_SPECS \ 161 { "asm_spec_common", ASM_SPEC_COMMON }, \ 162 { "asm_spec32", ASM_SPEC32 }, \ 163 { "asm_spec64", ASM_SPEC64 }, \ 164 { "link_os_linux_spec32", LINK_OS_LINUX_SPEC32 }, \ 165 { "link_os_linux_spec64", LINK_OS_LINUX_SPEC64 }, 166 167#undef MULTILIB_DEFAULTS 168#if DEFAULT_ARCH64_P 169#define MULTILIB_DEFAULTS { "m64" } 170#else 171#define MULTILIB_DEFAULTS { "m32" } 172#endif 173 174#ifndef RS6000_BI_ARCH 175 176/* 64-bit PowerPC Linux is always big-endian. */ 177#undef TARGET_LITTLE_ENDIAN 178#define TARGET_LITTLE_ENDIAN 0 179 180/* 64-bit PowerPC Linux always has a TOC. */ 181#undef TARGET_TOC 182#define TARGET_TOC 1 183 184/* Some things from sysv4.h we don't do when 64 bit. */ 185#undef TARGET_RELOCATABLE 186#define TARGET_RELOCATABLE 0 187#undef TARGET_EABI 188#define TARGET_EABI 0 189#undef TARGET_PROTOTYPE 190#define TARGET_PROTOTYPE 0 191 192#endif 193 194#define MASK_PROFILE_KERNEL 0x00100000 195 196/* Non-standard profiling for kernels, which just saves LR then calls 197 _mcount without worrying about arg saves. The idea is to change 198 the function prologue as little as possible as it isn't easy to 199 account for arg save/restore code added just for _mcount. */ 200#define TARGET_PROFILE_KERNEL (target_flags & MASK_PROFILE_KERNEL) 201 202/* Override sysv4.h. */ 203#undef EXTRA_SUBTARGET_SWITCHES 204#define EXTRA_SUBTARGET_SWITCHES \ 205 {"profile-kernel", MASK_PROFILE_KERNEL, \ 206 N_("Call mcount for profiling before a function prologue") }, \ 207 {"no-profile-kernel", -MASK_PROFILE_KERNEL, \ 208 N_("Call mcount for profiling after a function prologue") }, 209 210/* We use glibc _mcount for profiling. */ 211#define NO_PROFILE_COUNTERS TARGET_64BIT 212#define PROFILE_HOOK(LABEL) \ 213 do { if (TARGET_64BIT) output_profile_hook (LABEL); } while (0) 214 215/* We don't need to generate entries in .fixup. */ 216#undef RELOCATABLE_NEEDS_FIXUP 217 218/* PowerPC64 Linux word-aligns FP doubles when -malign-power is given. */ 219#undef ADJUST_FIELD_ALIGN 220#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ 221 ((TARGET_ALTIVEC && TREE_CODE (TREE_TYPE (FIELD)) == VECTOR_TYPE) \ 222 ? 128 \ 223 : (TARGET_64BIT \ 224 && TARGET_ALIGN_NATURAL == 0 \ 225 && TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \ 226 ? get_inner_array_type (FIELD) \ 227 : TREE_TYPE (FIELD)) == DFmode) \ 228 ? MIN ((COMPUTED), 32) \ 229 : (COMPUTED)) 230 231/* PowerPC64 Linux increases natural record alignment to doubleword if 232 the first field is an FP double, only if in power alignment mode. */ 233#undef ROUND_TYPE_ALIGN 234#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ 235 ((TARGET_ALTIVEC && TREE_CODE (STRUCT) == VECTOR_TYPE) \ 236 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \ 237 : (TARGET_64BIT \ 238 && (TREE_CODE (STRUCT) == RECORD_TYPE \ 239 || TREE_CODE (STRUCT) == UNION_TYPE \ 240 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ 241 && TARGET_ALIGN_NATURAL == 0) \ 242 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ 243 : MAX ((COMPUTED), (SPECIFIED))) 244 245/* Indicate that jump tables go in the text section. */ 246#undef JUMP_TABLES_IN_TEXT_SECTION 247#define JUMP_TABLES_IN_TEXT_SECTION TARGET_64BIT 248 249/* The linux ppc64 ABI isn't explicit on whether aggregates smaller 250 than a doubleword should be padded upward or downward. You could 251 reasonably assume that they follow the normal rules for structure 252 layout treating the parameter area as any other block of memory, 253 then map the reg param area to registers. ie. pad updard. 254 Setting both of the following defines results in this behavior. 255 Setting just the first one will result in aggregates that fit in a 256 doubleword being padded downward, and others being padded upward. 257 Not a bad idea as this results in struct { int x; } being passed 258 the same way as an int. */ 259#define AGGREGATE_PADDING_FIXED TARGET_64BIT 260#define AGGREGATES_PAD_UPWARD_ALWAYS 0 261 262/* We don't want anything in the reg parm area being passed on the 263 stack. */ 264#define MUST_PASS_IN_STACK(MODE, TYPE) \ 265 ((TARGET_64BIT \ 266 && (TYPE) != 0 \ 267 && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ 268 || TREE_ADDRESSABLE (TYPE))) \ 269 || (!TARGET_64BIT \ 270 && default_must_pass_in_stack ((MODE), (TYPE)))) 271 272/* Specify padding for the last element of a block move between 273 registers and memory. FIRST is nonzero if this is the only 274 element. */ 275#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ 276 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE)) 277 278/* __throw will restore its own return address to be the same as the 279 return address of the function that the throw is being made to. 280 This is unfortunate, because we want to check the original 281 return address to see if we need to restore the TOC. 282 So we have to squirrel it away with this. */ 283#define SETUP_FRAME_ADDRESSES() \ 284 do { if (TARGET_64BIT) rs6000_aix_emit_builtin_unwind_init (); } while (0) 285 286/* Override svr4.h */ 287#undef MD_EXEC_PREFIX 288#undef MD_STARTFILE_PREFIX 289 290#undef TARGET_OS_CPP_BUILTINS 291#define TARGET_OS_CPP_BUILTINS() \ 292 do \ 293 { \ 294 if (TARGET_64BIT) \ 295 { \ 296 builtin_define ("__PPC__"); \ 297 builtin_define ("__PPC64__"); \ 298 builtin_define ("__powerpc__"); \ 299 builtin_define ("__powerpc64__"); \ 300 builtin_define ("__PIC__"); \ 301 builtin_assert ("cpu=powerpc64"); \ 302 builtin_assert ("machine=powerpc64"); \ 303 } \ 304 else \ 305 { \ 306 builtin_define_std ("PPC"); \ 307 builtin_define_std ("powerpc"); \ 308 builtin_assert ("cpu=powerpc"); \ 309 builtin_assert ("machine=powerpc"); \ 310 TARGET_OS_SYSV_CPP_BUILTINS (); \ 311 } \ 312 } \ 313 while (0) 314 315#undef CPP_OS_DEFAULT_SPEC 316#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" 317 318/* The GNU C++ standard library currently requires _GNU_SOURCE being 319 defined on glibc-based systems. This temporary hack accomplishes this, 320 it should go away as soon as libstdc++-v3 has a real fix. */ 321#undef CPLUSPLUS_CPP_SPEC 322#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 323 324#undef LINK_SHLIB_SPEC 325#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 326 327#undef LIB_DEFAULT_SPEC 328#define LIB_DEFAULT_SPEC "%(lib_linux)" 329 330#undef STARTFILE_DEFAULT_SPEC 331#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 332 333#undef ENDFILE_DEFAULT_SPEC 334#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 335 336#undef LINK_START_DEFAULT_SPEC 337#define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 338 339#undef LINK_OS_DEFAULT_SPEC 340#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 341 342#define LINK_OS_LINUX_SPEC32 "-m elf32ppclinux %{!shared: %{!static: \ 343 %{rdynamic:-export-dynamic} \ 344 %{!dynamic-linker:-dynamic-linker /lib/ld.so.1}}}" 345 346#define LINK_OS_LINUX_SPEC64 "-m elf64ppc %{!shared: %{!static: \ 347 %{rdynamic:-export-dynamic} \ 348 %{!dynamic-linker:-dynamic-linker /lib64/ld64.so.1}}}" 349 350#undef TOC_SECTION_ASM_OP 351#define TOC_SECTION_ASM_OP \ 352 (TARGET_64BIT \ 353 ? "\t.section\t\".toc\",\"aw\"" \ 354 : "\t.section\t\".got\",\"aw\"") 355 356#undef MINIMAL_TOC_SECTION_ASM_OP 357#define MINIMAL_TOC_SECTION_ASM_OP \ 358 (TARGET_64BIT \ 359 ? "\t.section\t\".toc1\",\"aw\"" \ 360 : ((TARGET_RELOCATABLE || flag_pic) \ 361 ? "\t.section\t\".got2\",\"aw\"" \ 362 : "\t.section\t\".got1\",\"aw\"")) 363 364#undef TARGET_VERSION 365#define TARGET_VERSION fprintf (stderr, " (PowerPC64 GNU/Linux)"); 366 367/* Must be at least as big as our pointer type. */ 368#undef SIZE_TYPE 369#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 370 371#undef PTRDIFF_TYPE 372#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 373 374#undef WCHAR_TYPE 375#define WCHAR_TYPE (TARGET_64BIT ? "int" : "long int") 376#undef WCHAR_TYPE_SIZE 377#define WCHAR_TYPE_SIZE 32 378 379/* Override rs6000.h definition. */ 380#undef ASM_APP_ON 381#define ASM_APP_ON "#APP\n" 382 383/* Override rs6000.h definition. */ 384#undef ASM_APP_OFF 385#define ASM_APP_OFF "#NO_APP\n" 386 387/* PowerPC no-op instruction. */ 388#undef RS6000_CALL_GLUE 389#define RS6000_CALL_GLUE (TARGET_64BIT ? "nop" : "cror 31,31,31") 390 391#undef RS6000_MCOUNT 392#define RS6000_MCOUNT "_mcount" 393 394#ifdef __powerpc64__ 395/* _init and _fini functions are built from bits spread across many 396 object files, each potentially with a different TOC pointer. For 397 that reason, place a nop after the call so that the linker can 398 restore the TOC pointer if a TOC adjusting call stub is needed. */ 399#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 400 asm (SECTION_OP "\n" \ 401" bl ." #FUNC "\n" \ 402" nop\n" \ 403" .previous"); 404#endif 405 406/* FP save and restore routines. */ 407#undef SAVE_FP_PREFIX 408#define SAVE_FP_PREFIX (TARGET_64BIT ? "._savef" : "_savefpr_") 409#undef SAVE_FP_SUFFIX 410#define SAVE_FP_SUFFIX (TARGET_64BIT ? "" : "_l") 411#undef RESTORE_FP_PREFIX 412#define RESTORE_FP_PREFIX (TARGET_64BIT ? "._restf" : "_restfpr_") 413#undef RESTORE_FP_SUFFIX 414#define RESTORE_FP_SUFFIX (TARGET_64BIT ? "" : "_l") 415 416/* Dwarf2 debugging. */ 417#undef PREFERRED_DEBUGGING_TYPE 418#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 419 420/* This is how to declare the size of a function. */ 421#undef ASM_DECLARE_FUNCTION_SIZE 422#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 423 do \ 424 { \ 425 if (!flag_inhibit_size_directive) \ 426 { \ 427 fputs ("\t.size\t", (FILE)); \ 428 if (TARGET_64BIT) \ 429 putc ('.', (FILE)); \ 430 assemble_name ((FILE), (FNAME)); \ 431 fputs (",.-", (FILE)); \ 432 if (TARGET_64BIT) \ 433 putc ('.', (FILE)); \ 434 assemble_name ((FILE), (FNAME)); \ 435 putc ('\n', (FILE)); \ 436 } \ 437 } \ 438 while (0) 439 440/* Return nonzero if this entry is to be written into the constant 441 pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF 442 or a CONST containing one of them. If -mfp-in-toc (the default), 443 we also do this for floating-point constants. We actually can only 444 do this if the FP formats of the target and host machines are the 445 same, but we can't check that since not every file that uses 446 GO_IF_LEGITIMATE_ADDRESS_P includes real.h. We also do this when 447 we can write the entry into the TOC and the entry is not larger 448 than a TOC entry. */ 449 450#undef ASM_OUTPUT_SPECIAL_POOL_ENTRY_P 451#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \ 452 (TARGET_TOC \ 453 && (GET_CODE (X) == SYMBOL_REF \ 454 || (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \ 455 && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \ 456 || GET_CODE (X) == LABEL_REF \ 457 || (GET_CODE (X) == CONST_INT \ 458 && GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \ 459 || (GET_CODE (X) == CONST_DOUBLE \ 460 && ((TARGET_64BIT \ 461 && (TARGET_POWERPC64 \ 462 || TARGET_MINIMAL_TOC \ 463 || (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ 464 && ! TARGET_NO_FP_IN_TOC))) \ 465 || (!TARGET_64BIT \ 466 && !TARGET_NO_FP_IN_TOC \ 467 && !TARGET_RELOCATABLE \ 468 && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ 469 && BITS_PER_WORD == HOST_BITS_PER_INT))))) 470 471/* This is the same as the dbxelf.h version, except that we need to 472 use the function code label, not the function descriptor. */ 473#undef ASM_OUTPUT_SOURCE_LINE 474#define ASM_OUTPUT_SOURCE_LINE(FILE, LINE, COUNTER) \ 475do \ 476 { \ 477 char temp[256]; \ 478 ASM_GENERATE_INTERNAL_LABEL (temp, "LM", COUNTER); \ 479 fprintf (FILE, "\t.stabn 68,0,%d,", LINE); \ 480 assemble_name (FILE, temp); \ 481 putc ('-', FILE); \ 482 if (TARGET_64BIT) \ 483 putc ('.', FILE); \ 484 assemble_name (FILE, \ 485 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\ 486 putc ('\n', FILE); \ 487 (*targetm.asm_out.internal_label) (FILE, "LM", COUNTER); \ 488 } \ 489while (0) 490 491/* Similarly, we want the function code label here. */ 492#define DBX_OUTPUT_BRAC(FILE, NAME, BRAC) \ 493 do \ 494 { \ 495 const char *flab; \ 496 fprintf (FILE, "%s%d,0,0,", ASM_STABN_OP, BRAC); \ 497 assemble_name (FILE, NAME); \ 498 putc ('-', FILE); \ 499 if (current_function_func_begin_label != NULL_TREE) \ 500 flab = IDENTIFIER_POINTER (current_function_func_begin_label); \ 501 else \ 502 { \ 503 if (TARGET_64BIT) \ 504 putc ('.', FILE); \ 505 flab = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); \ 506 } \ 507 assemble_name (FILE, flab); \ 508 putc ('\n', FILE); \ 509 } \ 510 while (0) 511 512#define DBX_OUTPUT_LBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_LBRAC) 513#define DBX_OUTPUT_RBRAC(FILE, NAME) DBX_OUTPUT_BRAC (FILE, NAME, N_RBRAC) 514 515/* Another case where we want the dot name. */ 516#define DBX_OUTPUT_NFUN(FILE, LSCOPE, DECL) \ 517 do \ 518 { \ 519 fprintf (FILE, "%s\"\",%d,0,0,", ASM_STABS_OP, N_FUN); \ 520 assemble_name (FILE, LSCOPE); \ 521 putc ('-', FILE); \ 522 if (TARGET_64BIT) \ 523 putc ('.', FILE); \ 524 assemble_name (FILE, XSTR (XEXP (DECL_RTL (DECL), 0), 0)); \ 525 putc ('\n', FILE); \ 526 } \ 527 while (0) 528 529/* Select a format to encode pointers in exception handling data. CODE 530 is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is 531 true if the symbol may be affected by dynamic relocations. */ 532#undef ASM_PREFERRED_EH_DATA_FORMAT 533#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ 534 ((TARGET_64BIT || flag_pic || TARGET_RELOCATABLE) \ 535 ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \ 536 | (TARGET_64BIT ? DW_EH_PE_udata8 : DW_EH_PE_sdata4)) \ 537 : DW_EH_PE_absptr) 538 539/* For backward compatibility, we must continue to use the AIX 540 structure return convention. */ 541#undef DRAFT_V4_STRUCT_RET 542#define DRAFT_V4_STRUCT_RET (!TARGET_64BIT) 543 544#define TARGET_ASM_FILE_END file_end_indicate_exec_stack 545 546#define TARGET_HAS_F_SETLKW 547 548#define LINK_GCC_C_SEQUENCE_SPEC \ 549 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 550 551/* Do code reading to identify a signal frame, and set the frame 552 state data appropriately. See unwind-dw2.c for the structs. */ 553 554#ifdef IN_LIBGCC2 555#include <signal.h> 556#ifdef __powerpc64__ 557#include <sys/ucontext.h> 558 559enum { SIGNAL_FRAMESIZE = 128 }; 560 561#else 562 563/* During the 2.5 kernel series the kernel ucontext was changed, but 564 the new layout is compatible with the old one, so we just define 565 and use the old one here for simplicity and compatibility. */ 566 567struct kernel_old_ucontext { 568 unsigned long uc_flags; 569 struct ucontext *uc_link; 570 stack_t uc_stack; 571 struct sigcontext_struct uc_mcontext; 572 sigset_t uc_sigmask; 573}; 574enum { SIGNAL_FRAMESIZE = 64 }; 575#endif 576 577#endif 578 579#ifdef __powerpc64__ 580 581/* If the current unwind info (FS) does not contain explicit info 582 saving R2, then we have to do a minor amount of code reading to 583 figure out if it was saved. The big problem here is that the 584 code that does the save/restore is generated by the linker, so 585 we have no good way to determine at compile time what to do. */ 586 587#define MD_FROB_UPDATE_CONTEXT(CTX, FS) \ 588 do { \ 589 if ((FS)->regs.reg[2].how == REG_UNSAVED) \ 590 { \ 591 unsigned int *insn \ 592 = (unsigned int *) \ 593 _Unwind_GetGR ((CTX), LINK_REGISTER_REGNUM); \ 594 if (*insn == 0xE8410028) \ 595 _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40); \ 596 } \ 597 } while (0) 598 599#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ 600 do { \ 601 unsigned char *pc_ = (CONTEXT)->ra; \ 602 struct sigcontext *sc_; \ 603 long new_cfa_; \ 604 int i_; \ 605 \ 606 /* addi r1, r1, 128; li r0, 0x0077; sc (sigreturn) */ \ 607 /* addi r1, r1, 128; li r0, 0x00AC; sc (rt_sigreturn) */ \ 608 if (*(unsigned int *) (pc_+0) != 0x38210000 + SIGNAL_FRAMESIZE \ 609 || *(unsigned int *) (pc_+8) != 0x44000002) \ 610 break; \ 611 if (*(unsigned int *) (pc_+4) == 0x38000077) \ 612 { \ 613 struct sigframe { \ 614 char gap[SIGNAL_FRAMESIZE]; \ 615 struct sigcontext sigctx; \ 616 } *rt_ = (CONTEXT)->cfa; \ 617 sc_ = &rt_->sigctx; \ 618 } \ 619 else if (*(unsigned int *) (pc_+4) == 0x380000AC) \ 620 { \ 621 struct rt_sigframe { \ 622 int tramp[6]; \ 623 struct siginfo *pinfo; \ 624 struct ucontext *puc; \ 625 } *rt_ = (struct rt_sigframe *) pc_; \ 626 sc_ = &rt_->puc->uc_mcontext; \ 627 } \ 628 else \ 629 break; \ 630 \ 631 new_cfa_ = sc_->regs->gpr[STACK_POINTER_REGNUM]; \ 632 (FS)->cfa_how = CFA_REG_OFFSET; \ 633 (FS)->cfa_reg = STACK_POINTER_REGNUM; \ 634 (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ 635 \ 636 for (i_ = 0; i_ < 32; i_++) \ 637 if (i_ != STACK_POINTER_REGNUM) \ 638 { \ 639 (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ 640 (FS)->regs.reg[i_].loc.offset \ 641 = (long)&(sc_->regs->gpr[i_]) - new_cfa_; \ 642 } \ 643 \ 644 (FS)->regs.reg[LINK_REGISTER_REGNUM].how = REG_SAVED_OFFSET; \ 645 (FS)->regs.reg[LINK_REGISTER_REGNUM].loc.offset \ 646 = (long)&(sc_->regs->link) - new_cfa_; \ 647 \ 648 (FS)->regs.reg[ARG_POINTER_REGNUM].how = REG_SAVED_OFFSET; \ 649 (FS)->regs.reg[ARG_POINTER_REGNUM].loc.offset \ 650 = (long)&(sc_->regs->nip) - new_cfa_; \ 651 (FS)->retaddr_column = ARG_POINTER_REGNUM; \ 652 goto SUCCESS; \ 653 } while (0) 654 655#else 656 657#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ 658 do { \ 659 unsigned char *pc_ = (CONTEXT)->ra; \ 660 struct sigcontext *sc_; \ 661 long new_cfa_; \ 662 int i_; \ 663 \ 664 /* li r0, 0x7777; sc (sigreturn old) */ \ 665 /* li r0, 0x0077; sc (sigreturn new) */ \ 666 /* li r0, 0x6666; sc (rt_sigreturn old) */ \ 667 /* li r0, 0x00AC; sc (rt_sigreturn new) */ \ 668 if (*(unsigned int *) (pc_+4) != 0x44000002) \ 669 break; \ 670 if (*(unsigned int *) (pc_+0) == 0x38007777 \ 671 || *(unsigned int *) (pc_+0) == 0x38000077) \ 672 { \ 673 struct sigframe { \ 674 char gap[SIGNAL_FRAMESIZE]; \ 675 struct sigcontext sigctx; \ 676 } *rt_ = (CONTEXT)->cfa; \ 677 sc_ = &rt_->sigctx; \ 678 } \ 679 else if (*(unsigned int *) (pc_+0) == 0x38006666 \ 680 || *(unsigned int *) (pc_+0) == 0x380000AC) \ 681 { \ 682 struct rt_sigframe { \ 683 char gap[SIGNAL_FRAMESIZE]; \ 684 unsigned long _unused[2]; \ 685 struct siginfo *pinfo; \ 686 void *puc; \ 687 struct siginfo info; \ 688 struct kernel_old_ucontext uc; \ 689 } *rt_ = (CONTEXT)->cfa; \ 690 sc_ = &rt_->uc.uc_mcontext; \ 691 } \ 692 else \ 693 break; \ 694 \ 695 new_cfa_ = sc_->regs->gpr[STACK_POINTER_REGNUM]; \ 696 (FS)->cfa_how = CFA_REG_OFFSET; \ 697 (FS)->cfa_reg = STACK_POINTER_REGNUM; \ 698 (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ 699 \ 700 for (i_ = 0; i_ < 32; i_++) \ 701 if (i_ != STACK_POINTER_REGNUM) \ 702 { \ 703 (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \ 704 (FS)->regs.reg[i_].loc.offset \ 705 = (long)&(sc_->regs->gpr[i_]) - new_cfa_; \ 706 } \ 707 \ 708 (FS)->regs.reg[LINK_REGISTER_REGNUM].how = REG_SAVED_OFFSET; \ 709 (FS)->regs.reg[LINK_REGISTER_REGNUM].loc.offset \ 710 = (long)&(sc_->regs->link) - new_cfa_; \ 711 \ 712 (FS)->regs.reg[CR0_REGNO].how = REG_SAVED_OFFSET; \ 713 (FS)->regs.reg[CR0_REGNO].loc.offset \ 714 = (long)&(sc_->regs->nip) - new_cfa_; \ 715 (FS)->retaddr_column = CR0_REGNO; \ 716 goto SUCCESS; \ 717 } while (0) 718 719#endif 720 721 722#define OS_MISSING_POWERPC64 !TARGET_64BIT 723