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, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 4 2004, 2005 5 Free Software Foundation, Inc. 6 7 This file is part of GCC. 8 9 GCC is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 2, or (at your option) 12 any later version. 13 14 GCC is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with GCC; see the file COPYING. If not, write to 21 the Free Software Foundation, 51 Franklin Street, Fifth Floor, 22 Boston, MA 02110-1301, USA. */ 23 24 #define DBX_DEBUGGING_INFO 1 25 #define SDB_DEBUGGING_INFO 1 26 #undef PREFERRED_DEBUGGING_TYPE 27 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 28 29 #ifdef HAVE_GAS_PE_SECREL32_RELOC 30 #define DWARF2_DEBUGGING_INFO 1 31 32 #undef DBX_REGISTER_NUMBER 33 #define DBX_REGISTER_NUMBER(n) (write_symbols == DWARF2_DEBUG \ 34 ? svr4_dbx_register_map[n] \ 35 : dbx_register_map[n]) 36 37 /* Use section relative relocations for debugging offsets. Unlike 38 other targets that fake this by putting the section VMA at 0, PE 39 won't allow it. */ 40 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION) \ 41 do { \ 42 if (SIZE != 4) \ 43 abort (); \ 44 \ 45 fputs ("\t.secrel32\t", FILE); \ 46 assemble_name (FILE, LABEL); \ 47 } while (0) 48 #endif 49 50 #define TARGET_EXECUTABLE_SUFFIX ".exe" 51 52 #include <stdio.h> 53 54 #define MAYBE_UWIN_CPP_BUILTINS() /* Nothing. */ 55 56 #define TARGET_OS_CPP_BUILTINS() \ 57 do \ 58 { \ 59 builtin_define ("_X86_=1"); \ 60 builtin_assert ("system=winnt"); \ 61 builtin_define ("__stdcall=__attribute__((__stdcall__))"); \ 62 builtin_define ("__fastcall=__attribute__((__fastcall__))"); \ 63 builtin_define ("__cdecl=__attribute__((__cdecl__))"); \ 64 if (!flag_iso) \ 65 { \ 66 builtin_define ("_stdcall=__attribute__((__stdcall__))"); \ 67 builtin_define ("_fastcall=__attribute__((__fastcall__))"); \ 68 builtin_define ("_cdecl=__attribute__((__cdecl__))"); \ 69 } \ 70 /* Even though linkonce works with static libs, this is needed \ 71 to compare typeinfo symbols across dll boundaries. */ \ 72 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \ 73 MAYBE_UWIN_CPP_BUILTINS (); \ 74 EXTRA_OS_CPP_BUILTINS (); \ 75 } \ 76 while (0) 77 78 /* Get tree.c to declare a target-specific specialization of 79 merge_decl_attributes. */ 80 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 81 82 /* This macro defines names of additional specifications to put in the specs 83 that can be used in various specifications like CC1_SPEC. Its definition 84 is an initializer with a subgrouping for each command option. 85 86 Each subgrouping contains a string constant, that defines the 87 specification name, and a string constant that used by the GCC driver 88 program. 89 90 Do not define this macro if it does not need to do anything. */ 91 92 #undef SUBTARGET_EXTRA_SPECS 93 #define SUBTARGET_EXTRA_SPECS \ 94 { "mingw_include_path", DEFAULT_TARGET_MACHINE } 95 96 #undef MATH_LIBRARY 97 #define MATH_LIBRARY "" 98 99 #define SIZE_TYPE "unsigned int" 100 #define PTRDIFF_TYPE "int" 101 #define WCHAR_TYPE_SIZE 16 102 #define WCHAR_TYPE "short unsigned int" 103 104 105 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */ 106 #define HANDLE_PRAGMA_PACK_PUSH_POP 1 107 108 union tree_node; 109 #define TREE union tree_node * 110 111 #define drectve_section() \ 112 (fprintf (asm_out_file, "\t.section .drectve\n"), \ 113 in_section = NULL) 114 115 /* Older versions of gas don't handle 'r' as data. 116 Explicitly set data flag with 'd'. */ 117 #define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\"" 118 119 /* Don't allow flag_pic to propagate since gas may produce invalid code 120 otherwise. */ 121 122 #undef SUBTARGET_OVERRIDE_OPTIONS 123 #define SUBTARGET_OVERRIDE_OPTIONS \ 124 do { \ 125 if (flag_pic) \ 126 { \ 127 warning (0, "-f%s ignored for target (all code is position independent)",\ 128 (flag_pic > 1) ? "PIC" : "pic"); \ 129 flag_pic = 0; \ 130 } \ 131 } while (0) \ 132 133 /* Define this macro if references to a symbol must be treated 134 differently depending on something about the variable or 135 function named by the symbol (such as what section it is in). 136 137 On i386 running Windows NT, modify the assembler name with a suffix 138 consisting of an atsign (@) followed by string of digits that represents 139 the number of bytes of arguments passed to the function, if it has the 140 attribute STDCALL. 141 142 In addition, we must mark dll symbols specially. Definitions of 143 dllexport'd objects install some info in the .drectve section. 144 References to dllimport'd objects are fetched indirectly via 145 _imp__. If both are declared, dllexport overrides. This is also 146 needed to implement one-only vtables: they go into their own 147 section and we need to set DECL_SECTION_NAME so we do that here. 148 Note that we can be called twice on the same decl. */ 149 150 #undef SUBTARGET_ENCODE_SECTION_INFO 151 #define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info 152 #undef TARGET_STRIP_NAME_ENCODING 153 #define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full 154 155 /* Output a reference to a label. */ 156 #undef ASM_OUTPUT_LABELREF 157 #define ASM_OUTPUT_LABELREF i386_pe_output_labelref 158 159 #undef COMMON_ASM_OP 160 #define COMMON_ASM_OP "\t.comm\t" 161 162 /* Output a common block. */ 163 #undef ASM_OUTPUT_COMMON 164 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ 165 do { \ 166 if (i386_pe_dllexport_name_p (NAME)) \ 167 i386_pe_record_exported_symbol (NAME, 1); \ 168 if (! i386_pe_dllimport_name_p (NAME)) \ 169 { \ 170 fprintf ((STREAM), "\t.comm\t"); \ 171 assemble_name ((STREAM), (NAME)); \ 172 fprintf ((STREAM), ", %d\t%s %d\n", \ 173 (int)(ROUNDED), ASM_COMMENT_START, (int)(SIZE)); \ 174 } \ 175 } while (0) 176 177 /* Output the label for an initialized variable. */ 178 #undef ASM_DECLARE_OBJECT_NAME 179 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ 180 do { \ 181 if (i386_pe_dllexport_name_p (NAME)) \ 182 i386_pe_record_exported_symbol (NAME, 1); \ 183 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \ 184 } while (0) 185 186 187 /* Emit code to check the stack when allocating more that 4000 188 bytes in one go. */ 189 190 #define CHECK_STACK_LIMIT 4000 191 192 /* By default, target has a 80387, uses IEEE compatible arithmetic, 193 returns float values in the 387 and needs stack probes. 194 We also align doubles to 64-bits for MSVC default compatibility. */ 195 196 #undef TARGET_SUBTARGET_DEFAULT 197 #define TARGET_SUBTARGET_DEFAULT \ 198 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE \ 199 | MASK_ALIGN_DOUBLE) 200 201 /* This is how to output an assembler line 202 that says to advance the location counter 203 to a multiple of 2**LOG bytes. */ 204 205 #undef ASM_OUTPUT_ALIGN 206 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 207 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG)) 208 209 /* Windows uses explicit import from shared libraries. */ 210 #define MULTIPLE_SYMBOL_SPACES 1 211 212 extern void i386_pe_unique_section (TREE, int); 213 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section 214 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section 215 216 #define SUPPORTS_ONE_ONLY 1 217 218 /* Switch into a generic section. */ 219 #define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section 220 221 /* Select attributes for named sections. */ 222 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags 223 224 /* Write the extra assembler code needed to declare a function 225 properly. If we are generating SDB debugging information, this 226 will happen automatically, so we only need to handle other cases. */ 227 #undef ASM_DECLARE_FUNCTION_NAME 228 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 229 do \ 230 { \ 231 if (i386_pe_dllexport_name_p (NAME)) \ 232 i386_pe_record_exported_symbol (NAME, 0); \ 233 if (write_symbols != SDB_DEBUG) \ 234 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \ 235 ASM_OUTPUT_LABEL (FILE, NAME); \ 236 } \ 237 while (0) 238 239 /* Add an external function to the list of functions to be declared at 240 the end of the file. */ 241 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 242 do \ 243 { \ 244 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 245 i386_pe_record_external_function ((DECL), (NAME)); \ 246 } \ 247 while (0) 248 249 /* Declare the type properly for any external libcall. */ 250 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 251 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1) 252 253 /* This says out to put a global symbol in the BSS section. */ 254 #undef ASM_OUTPUT_ALIGNED_BSS 255 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 256 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 257 258 /* Output function declarations at the end of the file. */ 259 #undef TARGET_ASM_FILE_END 260 #define TARGET_ASM_FILE_END i386_pe_file_end 261 262 #undef ASM_COMMENT_START 263 #define ASM_COMMENT_START " #" 264 265 /* DWARF2 Unwinding doesn't work with exception handling yet. To make 266 it work, we need to build a libgcc_s.dll, and dcrt0.o should be 267 changed to call __register_frame_info/__deregister_frame_info. */ 268 #define DWARF2_UNWIND_INFO 0 269 270 /* Don't assume anything about the header files. */ 271 #define NO_IMPLICIT_EXTERN_C 272 273 #undef PROFILE_HOOK 274 #define PROFILE_HOOK(LABEL) \ 275 if (MAIN_NAME_P (DECL_NAME (current_function_decl))) \ 276 { \ 277 emit_call_insn (gen_rtx_CALL (VOIDmode, \ 278 gen_rtx_MEM (FUNCTION_MODE, \ 279 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \ 280 const0_rtx)); \ 281 } 282 283 /* Java Native Interface (JNI) methods on Win32 are invoked using the 284 stdcall calling convention. */ 285 #undef MODIFY_JNI_METHOD_CALL 286 #define MODIFY_JNI_METHOD_CALL(MDECL) \ 287 build_type_attribute_variant ((MDECL), \ 288 build_tree_list (get_identifier ("stdcall"), \ 289 NULL)) 290 291 /* External function declarations. */ 292 293 extern void i386_pe_record_external_function (tree, const char *); 294 extern void i386_pe_declare_function_type (FILE *, const char *, int); 295 extern void i386_pe_record_exported_symbol (const char *, int); 296 extern void i386_pe_file_end (void); 297 extern int i386_pe_dllexport_name_p (const char *); 298 extern int i386_pe_dllimport_name_p (const char *); 299 300 /* For Win32 ABI compatibility */ 301 #undef DEFAULT_PCC_STRUCT_RETURN 302 #define DEFAULT_PCC_STRUCT_RETURN 0 303 304 /* MSVC returns aggregate types of up to 8 bytes via registers. 305 See i386.c:ix86_return_in_memory. */ 306 #undef MS_AGGREGATE_RETURN 307 #define MS_AGGREGATE_RETURN 1 308 309 /* No data type wants to be aligned rounder than this. */ 310 #undef BIGGEST_ALIGNMENT 311 #define BIGGEST_ALIGNMENT 128 312 313 /* Biggest alignment supported by the object file format of this 314 machine. Use this macro to limit the alignment which can be 315 specified using the `__attribute__ ((aligned (N)))' construct. If 316 not defined, the default value is `BIGGEST_ALIGNMENT'. */ 317 #undef MAX_OFILE_ALIGNMENT 318 /* IMAGE_SCN_ALIGN_8192BYTES is the largest section alignment flag 319 specified in the PECOFF60 spec. Native MS compiler also limits 320 user-specified alignment to 8192 bytes. */ 321 #define MAX_OFILE_ALIGNMENT (8192 * 8) 322 323 /* Native complier aligns internal doubles in structures on dword boundaries. */ 324 #undef BIGGEST_FIELD_ALIGNMENT 325 #define BIGGEST_FIELD_ALIGNMENT 64 326 327 /* A bit-field declared as `int' forces `int' alignment for the struct. */ 328 #undef PCC_BITFIELD_TYPE_MATTERS 329 #define PCC_BITFIELD_TYPE_MATTERS 1 330 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec) 331 332 /* Enable alias attribute support. */ 333 #ifndef SET_ASM_OP 334 #define SET_ASM_OP "\t.set\t" 335 #endif 336 /* This implements the `alias' attribute, keeping any stdcall or 337 fastcall decoration. */ 338 #undef ASM_OUTPUT_DEF_FROM_DECLS 339 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET) \ 340 do \ 341 { \ 342 const char *alias; \ 343 rtx rtlname = XEXP (DECL_RTL (DECL), 0); \ 344 if (GET_CODE (rtlname) == SYMBOL_REF) \ 345 alias = XSTR (rtlname, 0); \ 346 else \ 347 abort (); \ 348 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 349 i386_pe_declare_function_type (STREAM, alias, \ 350 TREE_PUBLIC (DECL)); \ 351 ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET)); \ 352 } while (0) 353 354 /* GNU as supports weak symbols on PECOFF. */ 355 #ifdef HAVE_GAS_WEAK 356 #define ASM_WEAKEN_LABEL(FILE, NAME) \ 357 do \ 358 { \ 359 fputs ("\t.weak\t", (FILE)); \ 360 assemble_name ((FILE), (NAME)); \ 361 fputc ('\n', (FILE)); \ 362 } \ 363 while (0) 364 #endif /* HAVE_GAS_WEAK */ 365 366 /* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true, 367 but for .jcr section to work we also need crtbegin and crtend 368 objects. */ 369 #define TARGET_USE_JCR_SECTION 0 370 371 /* Decide whether it is safe to use a local alias for a virtual function 372 when constructing thunks. */ 373 #undef TARGET_USE_LOCAL_THUNK_ALIAS_P 374 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL)) 375 376 #define SUBTARGET_ATTRIBUTE_TABLE \ 377 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \ 378 { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute } 379 380 /* mcount() does not need a counter variable. */ 381 #undef NO_PROFILE_COUNTERS 382 #define NO_PROFILE_COUNTERS 1 383 384 #define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p 385 #define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition 386 387 #undef TREE 388 389 #ifndef BUFSIZ 390 # undef FILE 391 #endif 392