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) 1995-2013 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 #if ! defined (USE_MINGW64_LEADING_UNDERSCORES) 59 #undef USER_LABEL_PREFIX 60 #define USER_LABEL_PREFIX (TARGET_64BIT ? "" : "_") 61 62 #undef LOCAL_LABEL_PREFIX 63 #define LOCAL_LABEL_PREFIX (TARGET_64BIT ? "." : "") 64 65 #undef ASM_GENERATE_INTERNAL_LABEL 66 #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \ 67 sprintf ((BUF), "*%s%s%ld", LOCAL_LABEL_PREFIX, \ 68 (PREFIX), (long)(NUMBER)) 69 70 #undef LPREFIX 71 #define LPREFIX (TARGET_64BIT ? ".L" : "L") 72 73 #endif 74 75 #undef DBX_REGISTER_NUMBER 76 #define DBX_REGISTER_NUMBER(n) \ 77 (TARGET_64BIT ? dbx64_register_map[n] \ 78 : (write_symbols == DWARF2_DEBUG \ 79 ? svr4_dbx_register_map[n] : dbx_register_map[n])) 80 81 /* Map gcc register number to DWARF 2 CFA column number. For 32 bit 82 target, always use the svr4_dbx_register_map for DWARF .eh_frame 83 even if we don't use DWARF .debug_frame. */ 84 #undef DWARF_FRAME_REGNUM 85 #define DWARF_FRAME_REGNUM(n) \ 86 (TARGET_64BIT ? dbx64_register_map[(n)] \ 87 : svr4_dbx_register_map[(n)]) 88 89 /* The 64-bit MS_ABI changes the set of call-used registers. */ 90 #undef DWARF_FRAME_REGISTERS 91 #define DWARF_FRAME_REGISTERS (TARGET_64BIT ? 33 : 17) 92 93 #ifdef HAVE_GAS_PE_SECREL32_RELOC 94 /* Use section relative relocations for debugging offsets. Unlike 95 other targets that fake this by putting the section VMA at 0, PE 96 won't allow it. */ 97 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION) \ 98 do { \ 99 switch (SIZE) \ 100 { \ 101 case 4: \ 102 fputs ("\t.secrel32\t", FILE); \ 103 assemble_name (FILE, LABEL); \ 104 break; \ 105 case 8: \ 106 /* This is a hack. There is no 64-bit section relative \ 107 relocation. However, the COFF format also does not \ 108 support 64-bit file offsets; 64-bit applications are \ 109 limited to 32-bits of code+data in any one module. \ 110 Fake the 64-bit offset by zero-extending it. */ \ 111 fputs ("\t.secrel32\t", FILE); \ 112 assemble_name (FILE, LABEL); \ 113 fputs ("\n\t.long\t0", FILE); \ 114 break; \ 115 default: \ 116 gcc_unreachable (); \ 117 } \ 118 } while (0) 119 #endif 120 121 #define TARGET_EXECUTABLE_SUFFIX ".exe" 122 123 #define TARGET_OS_CPP_BUILTINS() \ 124 do \ 125 { \ 126 if (!TARGET_64BIT) \ 127 builtin_define ("_X86_=1"); \ 128 if (TARGET_SEH) \ 129 builtin_define ("__SEH__"); \ 130 builtin_assert ("system=winnt"); \ 131 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \ 132 builtin_define ("__fastcall=__attribute__((__fastcall__))"); \ 133 builtin_define ("__thiscall=__attribute__((__thiscall__))"); \ 134 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \ 135 if (!flag_iso) \ 136 { \ 137 builtin_define ("_stdcall=__attribute__((__stdcall__))"); \ 138 builtin_define ("_fastcall=__attribute__((__fastcall__))"); \ 139 builtin_define ("_thiscall=__attribute__((__thiscall__))"); \ 140 builtin_define ("_cdecl=__attribute__((__cdecl__))"); \ 141 } \ 142 /* Even though linkonce works with static libs, this is needed \ 143 to compare typeinfo symbols across dll boundaries. */ \ 144 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \ 145 builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \ 146 EXTRA_OS_CPP_BUILTINS (); \ 147 } \ 148 while (0) 149 150 /* Get tree.c to declare a target-specific specialization of 151 merge_decl_attributes. */ 152 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 153 154 /* This macro defines names of additional specifications to put in the specs 155 that can be used in various specifications like CC1_SPEC. Its definition 156 is an initializer with a subgrouping for each command option. 157 158 Each subgrouping contains a string constant, that defines the 159 specification name, and a string constant that used by the GCC driver 160 program. 161 162 Do not define this macro if it does not need to do anything. */ 163 164 #undef SUBTARGET_EXTRA_SPECS 165 #define SUBTARGET_EXTRA_SPECS \ 166 { "mingw_include_path", DEFAULT_TARGET_MACHINE } 167 168 #undef MATH_LIBRARY 169 #define MATH_LIBRARY "" 170 171 #define SIZE_TYPE (TARGET_64BIT ? "long long unsigned int" : "unsigned int") 172 #define PTRDIFF_TYPE (TARGET_64BIT ? "long long int" : "int") 173 174 #define WCHAR_TYPE_SIZE 16 175 #define WCHAR_TYPE "short unsigned int" 176 177 /* Windows64 continues to use a 32-bit long type. */ 178 #undef LONG_TYPE_SIZE 179 #define LONG_TYPE_SIZE 32 180 181 #define drectve_section() \ 182 (fprintf (asm_out_file, "\t.section .drectve\n"), \ 183 in_section = NULL) 184 185 /* Older versions of gas don't handle 'r' as data. 186 Explicitly set data flag with 'd'. */ 187 #define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\"" 188 189 /* Don't allow flag_pic to propagate since gas may produce invalid code 190 otherwise. */ 191 192 #undef SUBTARGET_OVERRIDE_OPTIONS 193 #define SUBTARGET_OVERRIDE_OPTIONS \ 194 do { \ 195 if (TARGET_64BIT && flag_pic != 1) \ 196 { \ 197 if (flag_pic > 1) \ 198 warning (0, \ 199 "-fPIC ignored for target (all code is position independent)"\ 200 ); \ 201 flag_pic = 1; \ 202 } \ 203 else if (!TARGET_64BIT && flag_pic) \ 204 { \ 205 warning (0, "-f%s ignored for target (all code is position independent)",\ 206 (flag_pic > 1) ? "PIC" : "pic"); \ 207 flag_pic = 0; \ 208 } \ 209 } while (0) 210 211 /* Define this macro if references to a symbol must be treated 212 differently depending on something about the variable or 213 function named by the symbol (such as what section it is in). 214 215 On i386 running Windows NT, modify the assembler name with a suffix 216 consisting of an atsign (@) followed by string of digits that represents 217 the number of bytes of arguments passed to the function, if it has the 218 attribute STDCALL. 219 220 In addition, we must mark dll symbols specially. Definitions of 221 dllexport'd objects install some info in the .drectve section. 222 References to dllimport'd objects are fetched indirectly via 223 _imp__. If both are declared, dllexport overrides. This is also 224 needed to implement one-only vtables: they go into their own 225 section and we need to set DECL_SECTION_NAME so we do that here. 226 Note that we can be called twice on the same decl. */ 227 228 #define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info 229 230 /* Local and global relocs can be placed always into readonly memory 231 for PE-COFF targets. */ 232 #undef TARGET_ASM_RELOC_RW_MASK 233 #define TARGET_ASM_RELOC_RW_MASK i386_pe_reloc_rw_mask 234 235 /* Output a common block. */ 236 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON 237 #define ASM_OUTPUT_ALIGNED_DECL_COMMON \ 238 i386_pe_asm_output_aligned_decl_common 239 240 /* Output the label for an initialized variable. */ 241 #undef ASM_DECLARE_OBJECT_NAME 242 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ 243 do { \ 244 i386_pe_maybe_record_exported_symbol (DECL, NAME, 1); \ 245 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \ 246 } while (0) 247 248 /* Output a reference to a label. Fastcall function symbols 249 keep their '@' prefix, while other symbols are prefixed 250 with user_label_prefix. */ 251 #undef ASM_OUTPUT_LABELREF 252 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \ 253 do { \ 254 if ((NAME)[0] != FASTCALL_PREFIX) \ 255 fputs (user_label_prefix, (STREAM)); \ 256 fputs ((NAME), (STREAM)); \ 257 } while (0) 258 259 /* This does much the same in memory rather than to a stream. */ 260 #undef TARGET_MANGLE_ASSEMBLER_NAME 261 #define TARGET_MANGLE_ASSEMBLER_NAME i386_pe_mangle_assembler_name 262 263 264 /* Emit code to check the stack when allocating more than 4000 265 bytes in one go. */ 266 #define CHECK_STACK_LIMIT 4000 267 268 #undef STACK_BOUNDARY 269 #define STACK_BOUNDARY (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD) 270 271 /* By default, target has a 80387, uses IEEE compatible arithmetic, 272 returns float values in the 387 and needs stack probes. 273 We also align doubles to 64-bits for MSVC default compatibility. */ 274 275 #undef TARGET_SUBTARGET_DEFAULT 276 #define TARGET_SUBTARGET_DEFAULT \ 277 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS \ 278 | MASK_STACK_PROBE | MASK_ALIGN_DOUBLE) 279 280 #undef TARGET_SUBTARGET64_DEFAULT 281 #define TARGET_SUBTARGET64_DEFAULT \ 282 MASK_128BIT_LONG_DOUBLE 283 284 /* This is how to output an assembler line 285 that says to advance the location counter 286 to a multiple of 2**LOG bytes. */ 287 288 #undef ASM_OUTPUT_ALIGN 289 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 290 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG)) 291 292 /* Windows uses explicit import from shared libraries. */ 293 #define MULTIPLE_SYMBOL_SPACES 1 294 295 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section 296 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 297 298 #define SUPPORTS_ONE_ONLY 1 299 300 /* Switch into a generic section. */ 301 #define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section 302 303 /* Select attributes for named sections. */ 304 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags 305 306 /* Write the extra assembler code needed to declare a function 307 properly. If we are generating SDB debugging information, this 308 will happen automatically, so we only need to handle other cases. */ 309 #undef ASM_DECLARE_FUNCTION_NAME 310 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 311 i386_pe_start_function (FILE, NAME, DECL) 312 313 #undef ASM_DECLARE_FUNCTION_SIZE 314 #define ASM_DECLARE_FUNCTION_SIZE(FILE,NAME,DECL) \ 315 i386_pe_end_function (FILE, NAME, DECL) 316 317 /* Add an external function to the list of functions to be declared at 318 the end of the file. */ 319 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 320 do \ 321 { \ 322 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 323 i386_pe_record_external_function ((DECL), (NAME)); \ 324 } \ 325 while (0) 326 327 /* Declare the type properly for any external libcall. */ 328 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 329 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1) 330 331 /* This says out to put a global symbol in the BSS section. */ 332 #undef ASM_OUTPUT_ALIGNED_BSS 333 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 334 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 335 336 /* Put all *tf routines in libgcc. */ 337 #undef LIBGCC2_HAS_TF_MODE 338 #define LIBGCC2_HAS_TF_MODE 1 339 #define LIBGCC2_TF_CEXT q 340 #define TF_SIZE 113 341 342 /* 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 /* Static stack checking is supported by means of probes. */ 478 #define STACK_CHECK_STATIC_BUILTIN 1 479