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,
5 Free Software Foundation, Inc.
7 This file is part of GCC.
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)
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.
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. */
24 #define DBX_DEBUGGING_INFO 1
25 #define SDB_DEBUGGING_INFO 1
26 #undef PREFERRED_DEBUGGING_TYPE
27 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
29 #ifdef HAVE_GAS_PE_SECREL32_RELOC
30 #define DWARF2_DEBUGGING_INFO 1
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])
37 /* Use section relative relocations for debugging offsets. Unlike
38 other targets that fake this by putting the section VMA at 0, PE
40 #define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL) \
45 fputs ("\t.secrel32\t", FILE); \
46 assemble_name (FILE, LABEL); \
50 #define TARGET_EXECUTABLE_SUFFIX ".exe"
54 #define MAYBE_UWIN_CPP_BUILTINS() /* Nothing. */
56 #define TARGET_OS_CPP_BUILTINS() \
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__))"); \
66 builtin_define ("_stdcall=__attribute__((__stdcall__))"); \
67 builtin_define ("_fastcall=__attribute__((__fastcall__))"); \
68 builtin_define ("_cdecl=__attribute__((__cdecl__))"); \
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 (); \
78 /* Get tree.c to declare a target-specific specialization of
79 merge_decl_attributes. */
80 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1
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.
86 Each subgrouping contains a string constant, that defines the
87 specification name, and a string constant that used by the GCC driver
90 Do not define this macro if it does not need to do anything. */
92 #undef SUBTARGET_EXTRA_SPECS
93 #define SUBTARGET_EXTRA_SPECS \
94 { "mingw_include_path", DEFAULT_TARGET_MACHINE }
97 #define MATH_LIBRARY ""
99 #define SIZE_TYPE "unsigned int"
100 #define PTRDIFF_TYPE "int"
101 #define WCHAR_TYPE_SIZE 16
102 #define WCHAR_TYPE "short unsigned int"
105 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
106 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
109 #define TREE union tree_node *
111 #undef EXTRA_SECTIONS
112 #define EXTRA_SECTIONS in_drectve
114 #undef EXTRA_SECTION_FUNCTIONS
115 #define EXTRA_SECTION_FUNCTIONS \
116 DRECTVE_SECTION_FUNCTION \
117 SWITCH_TO_SECTION_FUNCTION
119 #define DRECTVE_SECTION_FUNCTION \
121 drectve_section (void) \
123 if (in_section != in_drectve) \
125 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \
126 in_section = in_drectve; \
129 void drectve_section (void);
131 /* Older versions of gas don't handle 'r' as data.
132 Explicitly set data flag with 'd'. */
133 #define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\""
135 /* Switch to SECTION (an `enum in_section').
137 ??? This facility should be provided by GCC proper.
138 The problem is that we want to temporarily switch sections in
139 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
141 #define SWITCH_TO_SECTION_FUNCTION \
142 void switch_to_section (enum in_section, tree); \
144 switch_to_section (enum in_section section, tree decl) \
148 case in_text: text_section (); break; \
149 case in_unlikely_executed_text: unlikely_text_section (); break; \
150 case in_data: data_section (); break; \
151 case in_readonly_data: readonly_data_section (); break; \
152 case in_named: named_section (decl, NULL, 0); break; \
153 case in_drectve: drectve_section (); break; \
154 default: abort (); break; \
158 /* Don't allow flag_pic to propagate since gas may produce invalid code
161 #undef SUBTARGET_OVERRIDE_OPTIONS
162 #define SUBTARGET_OVERRIDE_OPTIONS \
166 warning (0, "-f%s ignored for target (all code is position independent)",\
167 (flag_pic > 1) ? "PIC" : "pic"); \
172 /* Define this macro if references to a symbol must be treated
173 differently depending on something about the variable or
174 function named by the symbol (such as what section it is in).
176 On i386 running Windows NT, modify the assembler name with a suffix
177 consisting of an atsign (@) followed by string of digits that represents
178 the number of bytes of arguments passed to the function, if it has the
181 In addition, we must mark dll symbols specially. Definitions of
182 dllexport'd objects install some info in the .drectve section.
183 References to dllimport'd objects are fetched indirectly via
184 _imp__. If both are declared, dllexport overrides. This is also
185 needed to implement one-only vtables: they go into their own
186 section and we need to set DECL_SECTION_NAME so we do that here.
187 Note that we can be called twice on the same decl. */
189 #undef SUBTARGET_ENCODE_SECTION_INFO
190 #define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info
191 #undef TARGET_STRIP_NAME_ENCODING
192 #define TARGET_STRIP_NAME_ENCODING i386_pe_strip_name_encoding_full
194 /* Output a reference to a label. */
195 #undef ASM_OUTPUT_LABELREF
196 #define ASM_OUTPUT_LABELREF i386_pe_output_labelref
199 #define COMMON_ASM_OP "\t.comm\t"
201 /* Output a common block. */
202 #undef ASM_OUTPUT_COMMON
203 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
205 if (i386_pe_dllexport_name_p (NAME)) \
206 i386_pe_record_exported_symbol (NAME, 1); \
207 if (! i386_pe_dllimport_name_p (NAME)) \
209 fprintf ((STREAM), "\t.comm\t"); \
210 assemble_name ((STREAM), (NAME)); \
211 fprintf ((STREAM), ", %d\t%s %d\n", \
212 (int)(ROUNDED), ASM_COMMENT_START, (int)(SIZE)); \
216 /* Output the label for an initialized variable. */
217 #undef ASM_DECLARE_OBJECT_NAME
218 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
220 if (i386_pe_dllexport_name_p (NAME)) \
221 i386_pe_record_exported_symbol (NAME, 1); \
222 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
226 /* Emit code to check the stack when allocating more that 4000
229 #define CHECK_STACK_LIMIT 4000
231 /* By default, target has a 80387, uses IEEE compatible arithmetic,
232 returns float values in the 387 and needs stack probes.
233 We also align doubles to 64-bits for MSVC default compatibility. */
235 #undef TARGET_SUBTARGET_DEFAULT
236 #define TARGET_SUBTARGET_DEFAULT \
237 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE \
240 /* This is how to output an assembler line
241 that says to advance the location counter
242 to a multiple of 2**LOG bytes. */
244 #undef ASM_OUTPUT_ALIGN
245 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
246 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
248 /* Windows uses explicit import from shared libraries. */
249 #define MULTIPLE_SYMBOL_SPACES 1
251 extern void i386_pe_unique_section (TREE
, int);
252 #define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
253 #define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
255 #define SUPPORTS_ONE_ONLY 1
257 /* Switch into a generic section. */
258 #define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section
260 /* Select attributes for named sections. */
261 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags
263 /* Write the extra assembler code needed to declare a function
264 properly. If we are generating SDB debugging information, this
265 will happen automatically, so we only need to handle other cases. */
266 #undef ASM_DECLARE_FUNCTION_NAME
267 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
270 if (i386_pe_dllexport_name_p (NAME)) \
271 i386_pe_record_exported_symbol (NAME, 0); \
272 if (write_symbols != SDB_DEBUG) \
273 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
274 ASM_OUTPUT_LABEL (FILE, NAME); \
278 /* Add an external function to the list of functions to be declared at
279 the end of the file. */
280 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
283 if (TREE_CODE (DECL) == FUNCTION_DECL) \
284 i386_pe_record_external_function ((DECL), (NAME)); \
288 /* Declare the type properly for any external libcall. */
289 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
290 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
292 /* This says out to put a global symbol in the BSS section. */
293 #undef ASM_OUTPUT_ALIGNED_BSS
294 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
295 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
297 /* Output function declarations at the end of the file. */
298 #undef TARGET_ASM_FILE_END
299 #define TARGET_ASM_FILE_END i386_pe_file_end
301 #undef ASM_COMMENT_START
302 #define ASM_COMMENT_START " #"
304 /* DWARF2 Unwinding doesn't work with exception handling yet. To make
305 it work, we need to build a libgcc_s.dll, and dcrt0.o should be
306 changed to call __register_frame_info/__deregister_frame_info. */
307 #define DWARF2_UNWIND_INFO 0
309 /* Don't assume anything about the header files. */
310 #define NO_IMPLICIT_EXTERN_C
313 #define PROFILE_HOOK(LABEL) \
314 if (MAIN_NAME_P (DECL_NAME (current_function_decl))) \
316 emit_call_insn (gen_rtx_CALL (VOIDmode, \
317 gen_rtx_MEM (FUNCTION_MODE, \
318 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
322 /* Java Native Interface (JNI) methods on Win32 are invoked using the
323 stdcall calling convention. */
324 #undef MODIFY_JNI_METHOD_CALL
325 #define MODIFY_JNI_METHOD_CALL(MDECL) \
326 build_type_attribute_variant ((MDECL), \
327 build_tree_list (get_identifier ("stdcall"), \
330 /* External function declarations. */
332 extern void i386_pe_record_external_function (tree
, const char *);
333 extern void i386_pe_declare_function_type (FILE *, const char *, int);
334 extern void i386_pe_record_exported_symbol (const char *, int);
335 extern void i386_pe_file_end (void);
336 extern int i386_pe_dllexport_name_p (const char *);
337 extern int i386_pe_dllimport_name_p (const char *);
339 /* For Win32 ABI compatibility */
340 #undef DEFAULT_PCC_STRUCT_RETURN
341 #define DEFAULT_PCC_STRUCT_RETURN 0
343 /* MSVC returns aggregate types of up to 8 bytes via registers.
344 See i386.c:ix86_return_in_memory. */
345 #undef MS_AGGREGATE_RETURN
346 #define MS_AGGREGATE_RETURN 1
348 /* No data type wants to be aligned rounder than this. */
349 #undef BIGGEST_ALIGNMENT
350 #define BIGGEST_ALIGNMENT 128
352 /* Native complier aligns internal doubles in structures on dword boundaries. */
353 #undef BIGGEST_FIELD_ALIGNMENT
354 #define BIGGEST_FIELD_ALIGNMENT 64
356 /* A bit-field declared as `int' forces `int' alignment for the struct. */
357 #undef PCC_BITFIELD_TYPE_MATTERS
358 #define PCC_BITFIELD_TYPE_MATTERS 1
359 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
361 /* Enable alias attribute support. */
363 #define SET_ASM_OP "\t.set\t"
365 /* This implements the `alias' attribute, keeping any stdcall or
366 fastcall decoration. */
367 #undef ASM_OUTPUT_DEF_FROM_DECLS
368 #define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET) \
372 rtx rtlname = XEXP (DECL_RTL (DECL), 0); \
373 if (GET_CODE (rtlname) == SYMBOL_REF) \
374 alias = XSTR (rtlname, 0); \
377 if (TREE_CODE (DECL) == FUNCTION_DECL) \
378 i386_pe_declare_function_type (STREAM, alias, \
379 TREE_PUBLIC (DECL)); \
380 ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET)); \
383 /* GNU as supports weak symbols on PECOFF. */
385 #define ASM_WEAKEN_LABEL(FILE, NAME) \
388 fputs ("\t.weak\t", (FILE)); \
389 assemble_name ((FILE), (NAME)); \
390 fputc ('\n', (FILE)); \
393 #endif /* HAVE_GAS_WEAK */
395 /* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true,
396 but for .jcr section to work we also need crtbegin and crtend
398 #define TARGET_USE_JCR_SECTION 0
400 /* Decide whether it is safe to use a local alias for a virtual function
401 when constructing thunks. */
402 #undef TARGET_USE_LOCAL_THUNK_ALIAS_P
403 #define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL))
405 #define SUBTARGET_ATTRIBUTE_TABLE \
406 /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */ \
407 { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute }
409 /* mcount() does not need a counter variable. */
410 #undef NO_PROFILE_COUNTERS
411 #define NO_PROFILE_COUNTERS 1
413 #define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p
414 #define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition