1 /* Operating system specific defines to be used when targeting GCC for 2 hosting on Windows32, using a Unix style C library and tools. 3 Copyright (C) 1995-2015 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 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #define DBX_DEBUGGING_INFO 1 22 #define SDB_DEBUGGING_INFO 1 23 #if TARGET_64BIT_DEFAULT || defined (HAVE_GAS_PE_SECREL32_RELOC) 24 #define DWARF2_DEBUGGING_INFO 1 25 #endif 26 27 #undef PREFERRED_DEBUGGING_TYPE 28 #if (DWARF2_DEBUGGING_INFO) 29 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 30 #else 31 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 32 #endif 33 34 #undef TARGET_SEH 35 #define TARGET_SEH (TARGET_64BIT_MS_ABI && flag_unwind_tables) 36 37 /* Win64 with SEH cannot represent DRAP stack frames. Disable its use. 38 Force the use of different mechanisms to allocate aligned local data. */ 39 #undef MAX_STACK_ALIGNMENT 40 #define MAX_STACK_ALIGNMENT (TARGET_SEH ? 128 : MAX_OFILE_ALIGNMENT) 41 42 /* Support hooks for SEH. */ 43 #undef TARGET_ASM_UNWIND_EMIT 44 #define TARGET_ASM_UNWIND_EMIT i386_pe_seh_unwind_emit 45 #undef TARGET_ASM_UNWIND_EMIT_BEFORE_INSN 46 #define TARGET_ASM_UNWIND_EMIT_BEFORE_INSN false 47 #undef TARGET_ASM_FUNCTION_END_PROLOGUE 48 #define TARGET_ASM_FUNCTION_END_PROLOGUE i386_pe_seh_end_prologue 49 #undef TARGET_ASM_EMIT_EXCEPT_PERSONALITY 50 #define TARGET_ASM_EMIT_EXCEPT_PERSONALITY i386_pe_seh_emit_except_personality 51 #undef TARGET_ASM_INIT_SECTIONS 52 #define TARGET_ASM_INIT_SECTIONS i386_pe_seh_init_sections 53 #define SUBTARGET_ASM_UNWIND_INIT i386_pe_seh_init 54 55 #undef DEFAULT_ABI 56 #define DEFAULT_ABI (TARGET_64BIT ? MS_ABI : SYSV_ABI) 57 58 #undef TARGET_PECOFF 59 #define TARGET_PECOFF 1 60 61 #if ! defined (USE_MINGW64_LEADING_UNDERSCORES) 62 #undef USER_LABEL_PREFIX 63 #define USER_LABEL_PREFIX (TARGET_64BIT ? "" : "_") 64 65 #undef LOCAL_LABEL_PREFIX 66 #define LOCAL_LABEL_PREFIX (TARGET_64BIT ? "." : "") 67 68 #undef ASM_GENERATE_INTERNAL_LABEL 69 #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \ 70 sprintf ((BUF), "*%s%s%ld", LOCAL_LABEL_PREFIX, \ 71 (PREFIX), (long)(NUMBER)) 72 73 #undef LPREFIX 74 #define LPREFIX (TARGET_64BIT ? ".L" : "L") 75 76 #endif 77 78 #undef DBX_REGISTER_NUMBER 79 #define DBX_REGISTER_NUMBER(n) \ 80 (TARGET_64BIT ? dbx64_register_map[n] \ 81 : (write_symbols == DWARF2_DEBUG \ 82 ? svr4_dbx_register_map[n] : dbx_register_map[n])) 83 84 /* Map gcc register number to DWARF 2 CFA column number. For 32 bit 85 target, always use the svr4_dbx_register_map for DWARF .eh_frame 86 even if we don't use DWARF .debug_frame. */ 87 #undef DWARF_FRAME_REGNUM 88 #define DWARF_FRAME_REGNUM(n) \ 89 (TARGET_64BIT ? dbx64_register_map[(n)] \ 90 : svr4_dbx_register_map[(n)]) 91 92 /* The 64-bit MS_ABI changes the set of call-used registers. */ 93 #undef DWARF_FRAME_REGISTERS 94 #define DWARF_FRAME_REGISTERS (TARGET_64BIT ? 33 : 17) 95 96 #ifdef HAVE_GAS_PE_SECREL32_RELOC 97 /* Use section relative relocations for debugging offsets. Unlike 98 other targets that fake this by putting the section VMA at 0, PE 99 won't allow it. */ 100 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION) \ 101 do { \ 102 switch (SIZE) \ 103 { \ 104 case 4: \ 105 fputs ("\t.secrel32\t", FILE); \ 106 assemble_name (FILE, LABEL); \ 107 break; \ 108 case 8: \ 109 /* This is a hack. There is no 64-bit section relative \ 110 relocation. However, the COFF format also does not \ 111 support 64-bit file offsets; 64-bit applications are \ 112 limited to 32-bits of code+data in any one module. \ 113 Fake the 64-bit offset by zero-extending it. */ \ 114 fputs ("\t.secrel32\t", FILE); \ 115 assemble_name (FILE, LABEL); \ 116 fputs ("\n\t.long\t0", FILE); \ 117 break; \ 118 default: \ 119 gcc_unreachable (); \ 120 } \ 121 } while (0) 122 #endif 123 124 #define TARGET_EXECUTABLE_SUFFIX ".exe" 125 126 #define TARGET_OS_CPP_BUILTINS() \ 127 do \ 128 { \ 129 if (!TARGET_64BIT) \ 130 builtin_define ("_X86_=1"); \ 131 if (TARGET_SEH) \ 132 builtin_define ("__SEH__"); \ 133 builtin_assert ("system=winnt"); \ 134 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \ 135 builtin_define ("__fastcall=__attribute__((__fastcall__))"); \ 136 builtin_define ("__thiscall=__attribute__((__thiscall__))"); \ 137 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \ 138 if (!flag_iso) \ 139 { \ 140 builtin_define ("_stdcall=__attribute__((__stdcall__))"); \ 141 builtin_define ("_fastcall=__attribute__((__fastcall__))"); \ 142 builtin_define ("_thiscall=__attribute__((__thiscall__))"); \ 143 builtin_define ("_cdecl=__attribute__((__cdecl__))"); \ 144 } \ 145 /* Even though linkonce works with static libs, this is needed \ 146 to compare typeinfo symbols across dll boundaries. */ \ 147 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \ 148 builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \ 149 EXTRA_OS_CPP_BUILTINS (); \ 150 } \ 151 while (0) 152 153 /* Get tree.c to declare a target-specific specialization of 154 merge_decl_attributes. */ 155 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 156 157 /* This macro defines names of additional specifications to put in the specs 158 that can be used in various specifications like CC1_SPEC. Its definition 159 is an initializer with a subgrouping for each command option. 160 161 Each subgrouping contains a string constant, that defines the 162 specification name, and a string constant that used by the GCC driver 163 program. 164 165 Do not define this macro if it does not need to do anything. */ 166 167 #undef SUBTARGET_EXTRA_SPECS 168 #define SUBTARGET_EXTRA_SPECS \ 169 { "mingw_include_path", DEFAULT_TARGET_MACHINE } 170 171 #undef MATH_LIBRARY 172 #define MATH_LIBRARY "" 173 174 #undef TARGET_LIBC_HAS_FUNCTION 175 #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function 176 177 #define SIZE_TYPE (TARGET_64BIT ? "long long unsigned int" : "unsigned int") 178 #define PTRDIFF_TYPE (TARGET_64BIT ? "long long int" : "int") 179 180 #define WCHAR_TYPE_SIZE 16 181 #define WCHAR_TYPE "short unsigned int" 182 183 /* Windows64 continues to use a 32-bit long type. */ 184 #undef LONG_TYPE_SIZE 185 #define LONG_TYPE_SIZE 32 186 187 #define drectve_section() \ 188 (fprintf (asm_out_file, "\t.section .drectve\n"), \ 189 in_section = NULL) 190 191 /* Older versions of gas don't handle 'r' as data. 192 Explicitly set data flag with 'd'. */ 193 #define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\"" 194 195 /* Don't allow flag_pic to propagate since gas may produce invalid code 196 otherwise. */ 197 198 #undef SUBTARGET_OVERRIDE_OPTIONS 199 #define SUBTARGET_OVERRIDE_OPTIONS \ 200 do { \ 201 if (TARGET_64BIT && flag_pic != 1) \ 202 { \ 203 if (flag_pic > 1) \ 204 warning (0, \ 205 "-fPIC ignored for target (all code is position independent)"\ 206 ); \ 207 flag_pic = 1; \ 208 } \ 209 else if (!TARGET_64BIT && flag_pic) \ 210 { \ 211 warning (0, "-f%s ignored for target (all code is position independent)",\ 212 (flag_pic > 1) ? "PIC" : "pic"); \ 213 flag_pic = 0; \ 214 } \ 215 } while (0) 216 217 /* Define this macro if references to a symbol must be treated 218 differently depending on something about the variable or 219 function named by the symbol (such as what section it is in). 220 221 On i386 running Windows NT, modify the assembler name with a suffix 222 consisting of an atsign (@) followed by string of digits that represents 223 the number of bytes of arguments passed to the function, if it has the 224 attribute STDCALL. 225 226 In addition, we must mark dll symbols specially. Definitions of 227 dllexport'd objects install some info in the .drectve section. 228 References to dllimport'd objects are fetched indirectly via 229 _imp__. If both are declared, dllexport overrides. This is also 230 needed to implement one-only vtables: they go into their own 231 section and we need to set DECL_SECTION_NAME so we do that here. 232 Note that we can be called twice on the same decl. */ 233 234 #define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info 235 236 /* Local and global relocs can be placed always into readonly memory 237 for PE-COFF targets. */ 238 #undef TARGET_ASM_RELOC_RW_MASK 239 #define TARGET_ASM_RELOC_RW_MASK i386_pe_reloc_rw_mask 240 241 /* Output a common block. */ 242 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON 243 #define ASM_OUTPUT_ALIGNED_DECL_COMMON \ 244 i386_pe_asm_output_aligned_decl_common 245 246 /* Output the label for an initialized variable. */ 247 #undef ASM_DECLARE_OBJECT_NAME 248 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ 249 do { \ 250 i386_pe_maybe_record_exported_symbol (DECL, NAME, 1); \ 251 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \ 252 } while (0) 253 254 /* Output a reference to a label. Fastcall function symbols 255 keep their '@' prefix, while other symbols are prefixed 256 with user_label_prefix. */ 257 #undef ASM_OUTPUT_LABELREF 258 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ 259 do { \ 260 if ((NAME)[0] != FASTCALL_PREFIX) \ 261 fputs (user_label_prefix, (STREAM)); \ 262 fputs ((NAME), (STREAM)); \ 263 } while (0) 264 265 /* This does much the same in memory rather than to a stream. */ 266 #undef TARGET_MANGLE_ASSEMBLER_NAME 267 #define TARGET_MANGLE_ASSEMBLER_NAME i386_pe_mangle_assembler_name 268 269 270 /* Emit code to check the stack when allocating more than 4000 271 bytes in one go. */ 272 #define CHECK_STACK_LIMIT 4000 273 274 #undef STACK_BOUNDARY 275 #define STACK_BOUNDARY (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD) 276 277 /* By default, target has a 80387, uses IEEE compatible arithmetic, 278 returns float values in the 387 and needs stack probes. 279 We also align doubles to 64-bits for MSVC default compatibility. */ 280 281 #undef TARGET_SUBTARGET_DEFAULT 282 #define TARGET_SUBTARGET_DEFAULT \ 283 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS \ 284 | MASK_STACK_PROBE | MASK_ALIGN_DOUBLE) 285 286 #undef TARGET_SUBTARGET64_DEFAULT 287 #define TARGET_SUBTARGET64_DEFAULT \ 288 MASK_128BIT_LONG_DOUBLE 289 290 /* This is how to output an assembler line 291 that says to advance the location counter 292 to a multiple of 2**LOG bytes. */ 293 294 #undef ASM_OUTPUT_ALIGN 295 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 296 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG)) 297 298 /* Windows uses explicit import from shared libraries. */ 299 #define MULTIPLE_SYMBOL_SPACES 1 300 301 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section 302 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 303 304 #define SUPPORTS_ONE_ONLY 1 305 306 /* Switch into a generic section. */ 307 #define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section 308 309 /* Select attributes for named sections. */ 310 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags 311 312 /* Write the extra assembler code needed to declare a function 313 properly. If we are generating SDB debugging information, this 314 will happen automatically, so we only need to handle other cases. */ 315 #undef ASM_DECLARE_FUNCTION_NAME 316 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 317 i386_pe_start_function (FILE, NAME, DECL) 318 319 #undef ASM_DECLARE_FUNCTION_SIZE 320 #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \ 321 i386_pe_end_function (FILE, NAME, DECL) 322 323 /* Add an external function to the list of functions to be declared at 324 the end of the file. */ 325 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 326 do \ 327 { \ 328 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 329 i386_pe_record_external_function ((DECL), (NAME)); \ 330 } \ 331 while (0) 332 333 /* Declare the type properly for any external libcall. */ 334 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 335 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1) 336 337 /* This says out to put a global symbol in the BSS section. */ 338 #undef ASM_OUTPUT_ALIGNED_BSS 339 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 340 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 341 342 /* Output function declarations at the end of the file. */ 343 #undef TARGET_ASM_FILE_END 344 #define TARGET_ASM_FILE_END i386_pe_file_end 345 346 #undef ASM_COMMENT_START 347 #define ASM_COMMENT_START " #" 348 349 #ifndef DWARF2_UNWIND_INFO 350 /* If configured with --disable-sjlj-exceptions, use DWARF2, else 351 default to SJLJ. */ 352 #if (defined (CONFIG_SJLJ_EXCEPTIONS) && !CONFIG_SJLJ_EXCEPTIONS) 353 /* The logic of this #if must be kept synchronised with the logic 354 for selecting the tmake_eh_file fragment in config.gcc. */ 355 #define DWARF2_UNWIND_INFO 1 356 /* If multilib is selected break build as sjlj is required. */ 357 #if defined (TARGET_BI_ARCH) 358 #error For 64-bit windows and 32-bit based multilib version of gcc just SJLJ exceptions are supported. 359 #endif 360 #else 361 #define DWARF2_UNWIND_INFO 0 362 #endif 363 #endif 364 365 /* Don't assume anything about the header files. */ 366 #define NO_IMPLICIT_EXTERN_C 367 368 #undef PROFILE_HOOK 369 #define PROFILE_HOOK(LABEL) \ 370 if (MAIN_NAME_P (DECL_NAME (current_function_decl))) \ 371 { \ 372 emit_call_insn (gen_rtx_CALL (VOIDmode, \ 373 gen_rtx_MEM (FUNCTION_MODE, \ 374 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \ 375 const0_rtx)); \ 376 } 377 378 /* Java Native Interface (JNI) methods on Win32 are invoked using the 379 stdcall calling convention. */ 380 #undef MODIFY_JNI_METHOD_CALL 381 #define MODIFY_JNI_METHOD_CALL(MDECL) \ 382 build_type_attribute_variant ((MDECL), \ 383 build_tree_list (get_identifier ("stdcall"), \ 384 NULL)) 385 386 /* For Win32 ABI compatibility */ 387 #undef DEFAULT_PCC_STRUCT_RETURN 388 #define DEFAULT_PCC_STRUCT_RETURN 0 389 390 /* MSVC returns aggregate types of up to 8 bytes via registers. 391 See i386.c:ix86_return_in_memory. */ 392 #undef MS_AGGREGATE_RETURN 393 #define MS_AGGREGATE_RETURN 1 394 395 /* Biggest alignment supported by the object file format of this 396 machine. Use this macro to limit the alignment which can be 397 specified using the `__attribute__ ((aligned (N)))' construct. If 398 not defined, the default value is `BIGGEST_ALIGNMENT'. */ 399 /* IMAGE_SCN_ALIGN_8192BYTES is the largest section alignment flag 400 specified in the PECOFF60 spec. Native MS compiler also limits 401 user-specified alignment to 8192 bytes. */ 402 #undef MAX_OFILE_ALIGNMENT 403 #define MAX_OFILE_ALIGNMENT (8192 * 8) 404 405 /* BIGGEST_FIELD_ALIGNMENT macro is used directly by libobjc, There, we 406 align internal doubles in structures on dword boundaries. Otherwise, 407 support vector modes using ADJUST_FIELD_ALIGN, defined in i386.h. */ 408 #ifdef IN_TARGET_LIBS 409 #undef BIGGEST_FIELD_ALIGNMENT 410 #define BIGGEST_FIELD_ALIGNMENT 64 411 #endif 412 413 /* A bit-field declared as `int' forces `int' alignment for the struct. */ 414 #undef PCC_BITFIELD_TYPE_MATTERS 415 #define PCC_BITFIELD_TYPE_MATTERS 1 416 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec) 417 418 /* Enable alias attribute support. */ 419 #ifndef SET_ASM_OP 420 #define SET_ASM_OP "\t.set\t" 421 #endif 422 423 /* This implements the `alias' attribute, keeping any stdcall or 424 fastcall decoration. */ 425 #undef ASM_OUTPUT_DEF_FROM_DECLS 426 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET) \ 427 do \ 428 { \ 429 const char *alias \ 430 = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \ 431 i386_pe_maybe_record_exported_symbol (DECL, alias, 0); \ 432 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 433 i386_pe_declare_function_type (STREAM, alias, \ 434 TREE_PUBLIC (DECL)); \ 435 ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET)); \ 436 } while (0) 437 438 /* GNU as supports weak symbols on PECOFF. */ 439 #ifdef HAVE_GAS_WEAK 440 #define ASM_WEAKEN_LABEL(FILE, NAME) \ 441 do \ 442 { \ 443 fputs ("\t.weak\t", (FILE)); \ 444 assemble_name ((FILE), (NAME)); \ 445 fputc ('\n', (FILE)); \ 446 } \ 447 while (0) 448 #endif /* HAVE_GAS_WEAK */ 449 450 /* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true, 451 but for .jcr section to work we also need crtbegin and crtend 452 objects. */ 453 #define TARGET_USE_JCR_SECTION 1 454 455 /* Decide whether it is safe to use a local alias for a virtual function 456 when constructing thunks. */ 457 #undef TARGET_USE_LOCAL_THUNK_ALIAS_P 458 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL)) 459 460 #define SUBTARGET_ATTRIBUTE_TABLE \ 461 { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute, \ 462 false } 463 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler, 464 affects_type_identity } */ 465 466 /* mcount() does not need a counter variable. */ 467 #undef NO_PROFILE_COUNTERS 468 #define NO_PROFILE_COUNTERS 1 469 470 #define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p 471 #define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition 472 #define SUBTARGET_MANGLE_DECL_ASSEMBLER_NAME i386_pe_mangle_decl_assembler_name 473 474 #undef TARGET_ASM_ASSEMBLE_VISIBILITY 475 #define TARGET_ASM_ASSEMBLE_VISIBILITY i386_pe_assemble_visibility 476 477 #undef SUB_TARGET_RECORD_STUB 478 #define SUB_TARGET_RECORD_STUB i386_pe_record_stub 479 480 /* Static stack checking is supported by means of probes. */ 481 #define STACK_CHECK_STATIC_BUILTIN 1 482