1 /* Operating system specific defines to be used when targeting GCC for
2 hosting on Windows NT 3.x, using a Unix style C library and tools,
3 as distinct from winnt.h, which is used to build GCC for use with a
4 windows style library and tool set and uses the Microsoft tools.
5 Copyright (C) 1995-2000 Free Software Foundation, Inc.
7 This file is part of GNU CC.
9 GNU CC 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 GNU CC 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 GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 #define YES_UNDERSCORES
26 #define DBX_DEBUGGING_INFO
27 #define SDB_DEBUGGING_INFO
28 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
33 /* Augment TARGET_SWITCHES with the cygwin/no-cygwin options. */
34 #define MASK_WIN32 0x40000000 /* Use -lming32 interface */
35 #define MASK_CYGWIN 0x20000000 /* Use -lcygwin interface */
36 #define MASK_WINDOWS 0x10000000 /* Use windows interface */
37 #define MASK_DLL 0x08000000 /* Use dll interface */
38 #define MASK_NOP_FUN_DLLIMPORT 0x20000 /* Ignore dllimport for functions */
40 #define TARGET_WIN32 (target_flags & MASK_WIN32)
41 #define TARGET_CYGWIN (target_flags & MASK_CYGWIN)
42 #define TARGET_WINDOWS (target_flags & MASK_WINDOWS)
43 #define TARGET_DLL (target_flags & MASK_DLL)
44 #define TARGET_NOP_FUN_DLLIMPORT (target_flags & MASK_NOP_FUN_DLLIMPORT)
46 #undef SUBTARGET_SWITCHES
47 #define SUBTARGET_SWITCHES \
48 { "cygwin", MASK_CYGWIN, "Use the Cygwin interface" }, \
49 { "no-cygwin", MASK_WIN32, "Use the Mingw32 interface" }, \
50 { "windows", MASK_WINDOWS, "Create GUI application" }, \
51 { "console", -MASK_WINDOWS, "Create console application" }, \
52 { "dll", MASK_DLL, "Generate code for a DLL" }, \
53 { "nop-fun-dllimport", MASK_NOP_FUN_DLLIMPORT, "Ignore dllimport for functions" }, \
54 { "no-nop-fun-dllimport", -MASK_NOP_FUN_DLLIMPORT, "" }, \
55 { "threads", 0, "Use Mingw-specific thread support" },
58 /* Support the __declspec keyword by turning them into attributes.
59 We currently only support: dllimport and dllexport.
60 Note that the current way we do this may result in a collision with
61 predefined attributes later on. This can be solved by using one attribute,
62 say __declspec__, and passing args to it. The problem with that approach
63 is that args are not accumulated: each new appearance would clobber any
67 #define CPP_PREDEFINES "-D_WIN32 \
68 -DWINNT -D_X86_=1 -D__STDC__=1\
69 -D__stdcall=__attribute__((__stdcall__)) \
70 -D__cdecl=__attribute__((__cdecl__)) \
71 -D__declspec(x)=__attribute__((x)) \
74 /* Normally, -lgcc is not needed since everything in it is in the DLL, but we
75 want to allow things to be added to it when installing new versions of
76 GCC without making a new CYGWIN.DLL, so we leave it. Profiling is handled
77 by calling the init function from the prologue. */
80 #define STARTFILE_SPEC "%{mdll: %{mno-cygwin:dllcrt1%O%s}} \
81 %{!mdll: %{!mno-cygwin:crt0%O%s} \
82 %{mno-cygwin:crt1%O%s} %{pg:gcrt0%O%s}}"
85 #define CPP_SPEC "-remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
86 %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__} \
87 %{mno-cygwin:-iwithprefixbefore \
88 ../../../../%(mingw_include_path)/include/mingw32 -D__MINGW32__=0.2}"
90 /* This macro defines names of additional specifications to put in the specs
91 that can be used in various specifications like CC1_SPEC. Its definition
92 is an initializer with a subgrouping for each command option.
94 Each subgrouping contains a string constant, that defines the
95 specification name, and a string constant that used by the GNU CC driver
98 Do not define this macro if it does not need to do anything. */
100 #undef SUBTARGET_EXTRA_SPECS
101 #define SUBTARGET_EXTRA_SPECS \
102 { "mingw_include_path", DEFAULT_TARGET_MACHINE }
104 /* We have to dynamic link to get to the system DLLs. All of libc, libm and
105 the Unix stuff is in cygwin.dll. The import library is called
106 'libcygwin.a'. For Windows applications, include more libraries, but
107 always include kernel32. We'd like to specific subsystem windows to
108 ld, but that doesn't work just yet. */
111 #define LIB_SPEC "%{pg:-lgmon} \
112 %{!mno-cygwin:-lcygwin} \
113 %{mno-cygwin:-lmingw32 -lmoldname -lcrtdll} \
114 %{mwindows:-lgdi32 -lcomdlg32} \
115 -luser32 -lkernel32 -ladvapi32 -lshell32"
117 #define LINK_SPEC "%{mwindows:--subsystem windows} \
118 %{mconsole:--subsystem console} \
119 %{mdll:--dll -e _DllMainCRTStartup@12}"
122 #define SIZE_TYPE "unsigned int"
123 #define PTRDIFF_TYPE "int"
124 #define WCHAR_UNSIGNED 1
125 #define WCHAR_TYPE_SIZE 16
126 #define WCHAR_TYPE "short unsigned int"
129 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
130 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
132 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
133 is a valid machine specific attribute for DECL.
134 The attributes in ATTRIBUTES have previously been assigned to DECL. */
135 extern int i386_pe_valid_decl_attribute_p ();
137 #undef VALID_MACHINE_DECL_ATTRIBUTE
138 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
139 i386_pe_valid_decl_attribute_p (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
141 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
142 is a valid machine specific attribute for TYPE.
143 The attributes in ATTRIBUTES have previously been assigned to TYPE. */
145 #undef VALID_MACHINE_TYPE_ATTRIBUTE
146 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) \
147 i386_pe_valid_type_attribute_p (TYPE, ATTRIBUTES, IDENTIFIER, ARGS)
148 extern int i386_pe_valid_type_attribute_p ();
150 extern union tree_node *i386_pe_merge_decl_attributes ();
151 #define MERGE_MACHINE_DECL_ATTRIBUTES(OLD, NEW) \
152 i386_pe_merge_decl_attributes ((OLD), (NEW))
154 /* Used to implement dllexport overriding dllimport semantics. It's also used
155 to handle vtables - the first pass won't do anything because
156 DECL_CONTEXT (DECL) will be 0 so i386_pe_dll{ex,im}port_p will return 0.
157 It's also used to handle dllimport override semantics. */
159 #define REDO_SECTION_INFO_P(DECL) \
160 ((DECL_MACHINE_ATTRIBUTES (DECL) != NULL_TREE) \
161 || (TREE_CODE (DECL) == VAR_DECL && DECL_VIRTUAL_P (DECL)))
163 #define REDO_SECTION_INFO_P(DECL) 1
167 #undef EXTRA_SECTIONS
168 #define EXTRA_SECTIONS in_ctor, in_dtor, in_drectve
170 #undef EXTRA_SECTION_FUNCTIONS
171 #define EXTRA_SECTION_FUNCTIONS \
172 CTOR_SECTION_FUNCTION \
173 DTOR_SECTION_FUNCTION \
174 DRECTVE_SECTION_FUNCTION \
175 SWITCH_TO_SECTION_FUNCTION
177 #define CTOR_SECTION_FUNCTION \
181 if (in_section != in_ctor) \
183 fprintf (asm_out_file, "\t.section .ctor\n"); \
184 in_section = in_ctor; \
188 #define DTOR_SECTION_FUNCTION \
192 if (in_section != in_dtor) \
194 fprintf (asm_out_file, "\t.section .dtor\n"); \
195 in_section = in_dtor; \
199 #define DRECTVE_SECTION_FUNCTION \
203 if (in_section != in_drectve) \
205 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \
206 in_section = in_drectve; \
210 /* Switch to SECTION (an `enum in_section').
212 ??? This facility should be provided by GCC proper.
213 The problem is that we want to temporarily switch sections in
214 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
216 #define SWITCH_TO_SECTION_FUNCTION \
218 switch_to_section (section, decl) \
219 enum in_section section; \
224 case in_text: text_section (); break; \
225 case in_data: data_section (); break; \
226 case in_named: named_section (decl, NULL, 0); break; \
227 case in_ctor: ctor_section (); break; \
228 case in_dtor: dtor_section (); break; \
229 case in_drectve: drectve_section (); break; \
230 default: abort (); break; \
234 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
237 fprintf (FILE, "%s\t", ASM_LONG); \
238 assemble_name (FILE, NAME); \
239 fprintf (FILE, "\n"); \
242 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
245 fprintf (FILE, "%s\t", ASM_LONG); \
246 assemble_name (FILE, NAME); \
247 fprintf (FILE, "\n"); \
250 /* Don't allow flag_pic to propagate since gas may produce invalid code
253 #undef SUBTARGET_OVERRIDE_OPTIONS
254 #define SUBTARGET_OVERRIDE_OPTIONS \
258 warning ("-f%s ignored for target (all code is position independent)",\
259 (flag_pic > 1) ? "PIC" : "pic"); \
264 /* Define this macro if references to a symbol must be treated
265 differently depending on something about the variable or
266 function named by the symbol (such as what section it is in).
268 On i386 running Windows NT, modify the assembler name with a suffix
269 consisting of an atsign (@) followed by string of digits that represents
270 the number of bytes of arguments passed to the function, if it has the
273 In addition, we must mark dll symbols specially. Definitions of
274 dllexport'd objects install some info in the .drectve section.
275 References to dllimport'd objects are fetched indirectly via
276 _imp__. If both are declared, dllexport overrides. This is also
277 needed to implement one-only vtables: they go into their own
278 section and we need to set DECL_SECTION_NAME so we do that here.
279 Note that we can be called twice on the same decl. */
281 extern void i386_pe_encode_section_info ();
283 #ifdef ENCODE_SECTION_INFO
284 #undef ENCODE_SECTION_INFO
286 #define ENCODE_SECTION_INFO(DECL) i386_pe_encode_section_info (DECL)
288 /* Utility used only in this file. */
289 #define I386_PE_STRIP_ENCODING(SYM_NAME) \
290 ((SYM_NAME) + ((SYM_NAME)[0] == '@' ? 3 : 0))
292 /* This macro gets just the user-specified name
293 out of the string in a SYMBOL_REF. Discard
294 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
295 #undef STRIP_NAME_ENCODING
296 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
299 const char *_name = I386_PE_STRIP_ENCODING (SYMBOL_NAME); \
300 for (_p = _name; *_p && *_p != '@'; ++_p) \
304 int _len = _p - _name; \
305 char *_new_name = (char *) alloca (_len + 1); \
306 strncpy (_new_name, _name, _len); \
307 _new_name[_len] = '\0'; \
315 /* Output a reference to a label. */
316 #undef ASM_OUTPUT_LABELREF
317 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
318 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \
319 I386_PE_STRIP_ENCODING (NAME)) \
321 /* Output a common block. */
322 #undef ASM_OUTPUT_COMMON
323 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
325 if (i386_pe_dllexport_name_p (NAME)) \
326 i386_pe_record_exported_symbol (NAME, 1); \
327 if (! i386_pe_dllimport_name_p (NAME)) \
329 fprintf ((STREAM), "\t.comm\t"); \
330 assemble_name ((STREAM), (NAME)); \
331 fprintf ((STREAM), ", %d\t%s %d\n", \
332 (ROUNDED), ASM_COMMENT_START, (SIZE)); \
336 /* Output the label for an initialized variable. */
337 #undef ASM_DECLARE_OBJECT_NAME
338 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
340 if (i386_pe_dllexport_name_p (NAME)) \
341 i386_pe_record_exported_symbol (NAME, 1); \
342 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
346 /* Emit code to check the stack when allocating more that 4000
349 #define CHECK_STACK_LIMIT 4000
351 /* By default, target has a 80387, uses IEEE compatible arithmetic,
352 and returns float values in the 387 and needs stack probes */
353 #undef TARGET_DEFAULT
355 #define TARGET_DEFAULT \
356 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE)
358 /* This is how to output an assembler line
359 that says to advance the location counter
360 to a multiple of 2**LOG bytes. */
362 #undef ASM_OUTPUT_ALIGN
363 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
364 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
366 /* Define this macro if in some cases global symbols from one translation
367 unit may not be bound to undefined symbols in another translation unit
368 without user intervention. For instance, under Microsoft Windows
369 symbols must be explicitly imported from shared libraries (DLLs). */
370 #define MULTIPLE_SYMBOL_SPACES
372 #define UNIQUE_SECTION_P(DECL) DECL_ONE_ONLY (DECL)
373 extern void i386_pe_unique_section ();
374 #define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
376 #define SUPPORTS_ONE_ONLY 1
378 /* A C statement to output something to the assembler file to switch to section
379 NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
380 NULL_TREE. Some target formats do not support arbitrary sections. Do not
381 define this macro in such cases. */
382 #undef ASM_OUTPUT_SECTION_NAME
383 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
385 static struct section_info \
387 struct section_info *next; \
389 enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
391 struct section_info *s; \
393 enum sect_enum type; \
395 for (s = sections; s; s = s->next) \
396 if (!strcmp (NAME, s->name)) \
399 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
400 type = SECT_EXEC, mode = "x"; \
401 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
402 type = SECT_RO, mode = ""; \
406 if (TREE_CODE (DECL) == VAR_DECL \
407 && lookup_attribute ("shared", DECL_MACHINE_ATTRIBUTES (DECL))) \
415 s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
416 s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
417 strcpy (s->name, NAME); \
419 s->next = sections; \
421 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
422 /* Functions may have been compiled at various levels of \
423 optimization so we can't use `same_size' here. Instead, \
424 have the linker pick one. */ \
425 if ((DECL) && DECL_ONE_ONLY (DECL)) \
426 fprintf (STREAM, "\t.linkonce %s\n", \
427 TREE_CODE (DECL) == FUNCTION_DECL \
428 ? "discard" : "same_size"); \
432 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
436 /* Write the extra assembler code needed to declare a function
437 properly. If we are generating SDB debugging information, this
438 will happen automatically, so we only need to handle other cases. */
439 #undef ASM_DECLARE_FUNCTION_NAME
440 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
443 if (i386_pe_dllexport_name_p (NAME)) \
444 i386_pe_record_exported_symbol (NAME, 0); \
445 if (write_symbols != SDB_DEBUG) \
446 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
447 ASM_OUTPUT_LABEL (FILE, NAME); \
451 /* Add an external function to the list of functions to be declared at
452 the end of the file. */
453 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
456 if (TREE_CODE (DECL) == FUNCTION_DECL) \
457 i386_pe_record_external_function (NAME); \
461 /* Declare the type properly for any external libcall. */
462 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
463 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
465 /* This says out to put a global symbol in the BSS section. */
466 #undef ASM_OUTPUT_ALIGNED_BSS
467 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
468 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
470 /* Output function declarations at the end of the file. */
471 #define ASM_FILE_END(FILE) \
472 i386_pe_asm_file_end (FILE)
474 #undef ASM_COMMENT_START
475 #define ASM_COMMENT_START " #"
477 /* DWARF2 Unwinding doesn't work with exception handling yet. */
478 #define DWARF2_UNWIND_INFO 0
480 /* Don't assume anything about the header files. */
481 #define NO_IMPLICIT_EXTERN_C
483 #define SUBTARGET_PROLOGUE \
485 && strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),\
488 emit_call_insn (gen_rtx (CALL, VOIDmode, \
489 gen_rtx_MEM (FUNCTION_MODE, \
490 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
494 /* External function declarations. */
497 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
498 #define PARAMS(ARGS) ARGS
500 #define PARAMS(ARGS) ()
504 #ifdef BUFSIZ /* stdio.h has been included, ok to use FILE * */
505 #define STDIO_PARAMS(ARGS) PARAMS(ARGS)
507 #define STDIO_PARAMS(ARGS) ()
510 extern void i386_pe_record_external_function PARAMS ((char *));
511 extern void i386_pe_declare_function_type STDIO_PARAMS ((FILE *, char *, int));
512 extern void i386_pe_record_exported_symbol PARAMS ((char *, int));
513 extern void i386_pe_asm_file_end STDIO_PARAMS ((FILE *));
515 /* For Win32 ABI compatibility */
516 #undef DEFAULT_PCC_STRUCT_RETURN
517 #define DEFAULT_PCC_STRUCT_RETURN 0
519 /* No data type wants to be aligned rounder than this. */
520 #undef BIGGEST_ALIGNMENT
521 #define BIGGEST_ALIGNMENT 128
523 /* A bitfield declared as `int' forces `int' alignment for the struct. */
524 #undef PCC_BITFIELDS_TYPE_MATTERS
525 #define PCC_BITFIELDS_TYPE_MATTERS 0
527 /* Enable alias attribute support. */
529 #define SET_ASM_OP "\t.set"