old-autovect-branch/gcc/config/i386/cygming.h

   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)    \
  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 \f
 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 \f
 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 \f
 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 \f
 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 /* Native complier aligns internal doubles in structures on dword boundaries.  */
 314 #undef  BIGGEST_FIELD_ALIGNMENT
 315 #define BIGGEST_FIELD_ALIGNMENT 64
 316
 317 /* A bit-field declared as `int' forces `int' alignment for the struct.  */
 318 #undef PCC_BITFIELD_TYPE_MATTERS
 319 #define PCC_BITFIELD_TYPE_MATTERS 1
 320 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
 321
 322 /* Enable alias attribute support.  */
 323 #ifndef SET_ASM_OP
 324 #define SET_ASM_OP "\t.set\t"
 325 #endif
 326 /* This implements the `alias' attribute, keeping any stdcall or
 327    fastcall decoration.  */
 328 #undef  ASM_OUTPUT_DEF_FROM_DECLS
 329 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET)                 \
 330   do                                                                    \
 331     {                                                                   \
 332       const char *alias;                                                \
 333       rtx rtlname = XEXP (DECL_RTL (DECL), 0);                          \
 334       if (GET_CODE (rtlname) == SYMBOL_REF)                             \
 335         alias = XSTR (rtlname, 0);                                      \
 336       else                                                              \
 337         abort ();                                                       \
 338       if (TREE_CODE (DECL) == FUNCTION_DECL)                            \
 339         i386_pe_declare_function_type (STREAM, alias,                   \
 340                                        TREE_PUBLIC (DECL));             \
 341       ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET));      \
 342     } while (0)
 343
 344 /* GNU as supports weak symbols on PECOFF. */
 345 #ifdef HAVE_GAS_WEAK
 346 #define ASM_WEAKEN_LABEL(FILE, NAME)  \
 347   do                                  \
 348     {                                 \
 349       fputs ("\t.weak\t", (FILE));    \
 350       assemble_name ((FILE), (NAME)); \
 351       fputc ('\n', (FILE));           \
 352     }                                 \
 353   while (0)
 354 #endif /* HAVE_GAS_WEAK */
 355
 356 /* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true,
 357    but for .jcr section to work we also need crtbegin and crtend
 358    objects.  */
 359 #define TARGET_USE_JCR_SECTION 0
 360
 361 /* Decide whether it is safe to use a local alias for a virtual function
 362    when constructing thunks.  */
 363 #undef TARGET_USE_LOCAL_THUNK_ALIAS_P
 364 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL))
 365
 366 #define SUBTARGET_ATTRIBUTE_TABLE \
 367   /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
 368   { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute }
 369
 370 /*  mcount() does not need a counter variable.  */
 371 #undef NO_PROFILE_COUNTERS
 372 #define NO_PROFILE_COUNTERS 1
 373
 374 #define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p
 375 #define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition
 376
 377 #undef TREE
 378
 379 #ifndef BUFSIZ
 380 # undef FILE
 381 #endif