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, 1996, 1997, 1998, 1999 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, "" },
57 /* Support the __declspec keyword by turning them into attributes.
58 We currently only support: dllimport and dllexport.
59 Note that the current way we do this may result in a collision with
60 predefined attributes later on. This can be solved by using one attribute,
61 say __declspec__, and passing args to it. The problem with that approach
62 is that args are not accumulated: each new appearance would clobber any
69 #define CPP_PREDEFINES "-Di386 -D_WIN32 \
70 -DWINNT -D_X86_=1 -D__STDC__=1\
71 -D__stdcall=__attribute__((__stdcall__)) \
72 -D__cdecl=__attribute__((__cdecl__)) \
73 -D__declspec(x)=__attribute__((x)) \
74 -Asystem(winnt) -Acpu(i386) -Amachine(i386)"
76 /* Normally, -lgcc is not needed since everything in it is in the DLL, but we
77 want to allow things to be added to it when installing new versions of
78 GCC without making a new CYGWIN.DLL, so we leave it. Profiling is handled
79 by calling the init function from the prologue. */
82 #define STARTFILE_SPEC "%{mdll: %{mno-cygwin:dllcrt1%O%s}} \
83 %{!mdll: %{!mno-cygwin:crt0%O%s} \
84 %{mno-cygwin:crt1%O%s} %{pg:gcrt0%O%s}}"
87 #define CPP_SPEC "-remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
88 %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__} \
89 %{mno-cygwin:-iwithprefixbefore \
90 ../../../../%(mingw_include_path)/include/mingw32 -D__MINGW32__=0.2}"
92 /* This macro defines names of additional specifications to put in the specs
93 that can be used in various specifications like CC1_SPEC. Its definition
94 is an initializer with a subgrouping for each command option.
96 Each subgrouping contains a string constant, that defines the
97 specification name, and a string constant that used by the GNU CC driver
100 Do not define this macro if it does not need to do anything. */
102 #undef SUBTARGET_EXTRA_SPECS
103 #define SUBTARGET_EXTRA_SPECS \
104 { "mingw_include_path", DEFAULT_TARGET_MACHINE }
106 /* We have to dynamic link to get to the system DLLs. All of libc, libm and
107 the Unix stuff is in cygwin.dll. The import library is called
108 'libcygwin.a'. For Windows applications, include more libraries, but
109 always include kernel32. We'd like to specific subsystem windows to
110 ld, but that doesn't work just yet. */
113 #define LIB_SPEC "%{pg:-lgmon} \
114 %{!mno-cygwin:-lcygwin} \
115 %{mno-cygwin:-lmingw32 -lmoldname -lcrtdll} \
116 %{mwindows:-lgdi32 -lcomdlg32} \
117 -luser32 -lkernel32 -ladvapi32 -lshell32"
119 #define LINK_SPEC "%{mwindows:--subsystem windows} \
120 %{mconsole:--subsystem console} \
121 %{mdll:--dll -e _DllMainCRTStartup@12}"
124 #define SIZE_TYPE "unsigned int"
125 #define PTRDIFF_TYPE "int"
126 #define WCHAR_UNSIGNED 1
127 #define WCHAR_TYPE_SIZE 16
128 #define WCHAR_TYPE "short unsigned int"
130 #define HAVE_ATEXIT 1
133 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
134 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
136 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
137 is a valid machine specific attribute for DECL.
138 The attributes in ATTRIBUTES have previously been assigned to DECL. */
139 extern int i386_pe_valid_decl_attribute_p ();
141 #undef VALID_MACHINE_DECL_ATTRIBUTE
142 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
143 i386_pe_valid_decl_attribute_p (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
145 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
146 is a valid machine specific attribute for TYPE.
147 The attributes in ATTRIBUTES have previously been assigned to TYPE. */
149 #undef VALID_MACHINE_TYPE_ATTRIBUTE
150 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) \
151 i386_pe_valid_type_attribute_p (TYPE, ATTRIBUTES, IDENTIFIER, ARGS)
152 extern int i386_pe_valid_type_attribute_p ();
154 extern union tree_node *i386_pe_merge_decl_attributes ();
155 #define MERGE_MACHINE_DECL_ATTRIBUTES(OLD, NEW) \
156 i386_pe_merge_decl_attributes ((OLD), (NEW))
158 /* Used to implement dllexport overriding dllimport semantics. It's also used
159 to handle vtables - the first pass won't do anything because
160 DECL_CONTEXT (DECL) will be 0 so i386_pe_dll{ex,im}port_p will return 0.
161 It's also used to handle dllimport override semantics. */
163 #define REDO_SECTION_INFO_P(DECL) \
164 ((DECL_MACHINE_ATTRIBUTES (DECL) != NULL_TREE) \
165 || (TREE_CODE (DECL) == VAR_DECL && DECL_VIRTUAL_P (DECL)))
167 #define REDO_SECTION_INFO_P(DECL) 1
171 #undef EXTRA_SECTIONS
172 #define EXTRA_SECTIONS in_ctor, in_dtor, in_drectve
174 #undef EXTRA_SECTION_FUNCTIONS
175 #define EXTRA_SECTION_FUNCTIONS \
176 CTOR_SECTION_FUNCTION \
177 DTOR_SECTION_FUNCTION \
178 DRECTVE_SECTION_FUNCTION \
179 SWITCH_TO_SECTION_FUNCTION
181 #define CTOR_SECTION_FUNCTION \
185 if (in_section != in_ctor) \
187 fprintf (asm_out_file, "\t.section .ctor\n"); \
188 in_section = in_ctor; \
192 #define DTOR_SECTION_FUNCTION \
196 if (in_section != in_dtor) \
198 fprintf (asm_out_file, "\t.section .dtor\n"); \
199 in_section = in_dtor; \
203 #define DRECTVE_SECTION_FUNCTION \
207 if (in_section != in_drectve) \
209 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \
210 in_section = in_drectve; \
214 /* Switch to SECTION (an `enum in_section').
216 ??? This facility should be provided by GCC proper.
217 The problem is that we want to temporarily switch sections in
218 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
220 #define SWITCH_TO_SECTION_FUNCTION \
222 switch_to_section (section, decl) \
223 enum in_section section; \
228 case in_text: text_section (); break; \
229 case in_data: data_section (); break; \
230 case in_named: named_section (decl, NULL, 0); break; \
231 case in_ctor: ctor_section (); break; \
232 case in_dtor: dtor_section (); break; \
233 case in_drectve: drectve_section (); break; \
234 default: abort (); break; \
238 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
241 fprintf (FILE, "%s\t", ASM_LONG); \
242 assemble_name (FILE, NAME); \
243 fprintf (FILE, "\n"); \
246 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
249 fprintf (FILE, "%s\t", ASM_LONG); \
250 assemble_name (FILE, NAME); \
251 fprintf (FILE, "\n"); \
254 /* Don't allow flag_pic to propagate since gas may produce invalid code
257 #undef SUBTARGET_OVERRIDE_OPTIONS
258 #define SUBTARGET_OVERRIDE_OPTIONS \
262 warning ("-f%s ignored for target (all code is position independent)",\
263 (flag_pic > 1) ? "PIC" : "pic"); \
268 /* Define this macro if references to a symbol must be treated
269 differently depending on something about the variable or
270 function named by the symbol (such as what section it is in).
272 On i386 running Windows NT, modify the assembler name with a suffix
273 consisting of an atsign (@) followed by string of digits that represents
274 the number of bytes of arguments passed to the function, if it has the
277 In addition, we must mark dll symbols specially. Definitions of
278 dllexport'd objects install some info in the .drectve section.
279 References to dllimport'd objects are fetched indirectly via
280 _imp__. If both are declared, dllexport overrides. This is also
281 needed to implement one-only vtables: they go into their own
282 section and we need to set DECL_SECTION_NAME so we do that here.
283 Note that we can be called twice on the same decl. */
285 extern void i386_pe_encode_section_info ();
287 #ifdef ENCODE_SECTION_INFO
288 #undef ENCODE_SECTION_INFO
290 #define ENCODE_SECTION_INFO(DECL) i386_pe_encode_section_info (DECL)
292 /* Utility used only in this file. */
293 #define I386_PE_STRIP_ENCODING(SYM_NAME) \
294 ((SYM_NAME) + ((SYM_NAME)[0] == '@' ? 3 : 0))
296 /* This macro gets just the user-specified name
297 out of the string in a SYMBOL_REF. Discard
298 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
299 #undef STRIP_NAME_ENCODING
300 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
303 const char *_name = I386_PE_STRIP_ENCODING (SYMBOL_NAME); \
304 for (_p = _name; *_p && *_p != '@'; ++_p) \
308 int _len = _p - _name; \
309 char *_new_name = (char *) alloca (_len + 1); \
310 strncpy (_new_name, _name, _len); \
311 _new_name[_len] = '\0'; \
319 /* Output a reference to a label. */
320 #undef ASM_OUTPUT_LABELREF
321 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
322 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \
323 I386_PE_STRIP_ENCODING (NAME)) \
325 /* Output a common block. */
326 #undef ASM_OUTPUT_COMMON
327 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
329 if (i386_pe_dllexport_name_p (NAME)) \
330 i386_pe_record_exported_symbol (NAME, 1); \
331 if (! i386_pe_dllimport_name_p (NAME)) \
333 fprintf ((STREAM), "\t.comm\t"); \
334 assemble_name ((STREAM), (NAME)); \
335 fprintf ((STREAM), ", %d\t%s %d\n", \
336 (ROUNDED), ASM_COMMENT_START, (SIZE)); \
340 /* Output the label for an initialized variable. */
341 #undef ASM_DECLARE_OBJECT_NAME
342 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
344 if (i386_pe_dllexport_name_p (NAME)) \
345 i386_pe_record_exported_symbol (NAME, 1); \
346 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
350 /* Emit code to check the stack when allocating more that 4000
353 #define CHECK_STACK_LIMIT 4000
355 /* By default, target has a 80387, uses IEEE compatible arithmetic,
356 and returns float values in the 387 and needs stack probes */
357 #undef TARGET_DEFAULT
359 #define TARGET_DEFAULT \
360 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE)
362 /* This is how to output an assembler line
363 that says to advance the location counter
364 to a multiple of 2**LOG bytes. */
366 #undef ASM_OUTPUT_ALIGN
367 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
368 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
370 /* Define this macro if in some cases global symbols from one translation
371 unit may not be bound to undefined symbols in another translation unit
372 without user intervention. For instance, under Microsoft Windows
373 symbols must be explicitly imported from shared libraries (DLLs). */
374 #define MULTIPLE_SYMBOL_SPACES
376 #define UNIQUE_SECTION_P(DECL) DECL_ONE_ONLY (DECL)
377 extern void i386_pe_unique_section ();
378 #define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
380 #define SUPPORTS_ONE_ONLY 1
382 /* A C statement to output something to the assembler file to switch to section
383 NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
384 NULL_TREE. Some target formats do not support arbitrary sections. Do not
385 define this macro in such cases. */
386 #undef ASM_OUTPUT_SECTION_NAME
387 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
389 static struct section_info \
391 struct section_info *next; \
393 enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
395 struct section_info *s; \
397 enum sect_enum type; \
399 for (s = sections; s; s = s->next) \
400 if (!strcmp (NAME, s->name)) \
403 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
404 type = SECT_EXEC, mode = "x"; \
405 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
406 type = SECT_RO, mode = ""; \
408 type = SECT_RW, mode = "w"; \
412 s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
413 s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
414 strcpy (s->name, NAME); \
416 s->next = sections; \
418 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
419 /* Functions may have been compiled at various levels of \
420 optimization so we can't use `same_size' here. Instead, \
421 have the linker pick one. */ \
422 if ((DECL) && DECL_ONE_ONLY (DECL)) \
423 fprintf (STREAM, "\t.linkonce %s\n", \
424 TREE_CODE (DECL) == FUNCTION_DECL \
425 ? "discard" : "same_size"); \
429 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
433 /* Write the extra assembler code needed to declare a function
434 properly. If we are generating SDB debugging information, this
435 will happen automatically, so we only need to handle other cases. */
436 #undef ASM_DECLARE_FUNCTION_NAME
437 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
440 if (i386_pe_dllexport_name_p (NAME)) \
441 i386_pe_record_exported_symbol (NAME, 0); \
442 if (write_symbols != SDB_DEBUG) \
443 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
444 ASM_OUTPUT_LABEL (FILE, NAME); \
448 /* Add an external function to the list of functions to be declared at
449 the end of the file. */
450 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
453 if (TREE_CODE (DECL) == FUNCTION_DECL) \
454 i386_pe_record_external_function (NAME); \
458 /* Declare the type properly for any external libcall. */
459 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
460 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
462 /* This says out to put a global symbol in the BSS section. */
463 #undef ASM_OUTPUT_ALIGNED_BSS
464 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
465 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
467 /* Output function declarations at the end of the file. */
468 #define ASM_FILE_END(FILE) \
469 i386_pe_asm_file_end (FILE)
471 #undef ASM_COMMENT_START
472 #define ASM_COMMENT_START " #"
474 /* DWARF2 Unwinding doesn't work with exception handling yet. */
475 #define DWARF2_UNWIND_INFO 0
477 /* Don't assume anything about the header files. */
478 #define NO_IMPLICIT_EXTERN_C
480 #define SUBTARGET_PROLOGUE \
482 && strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),\
485 emit_call_insn (gen_rtx (CALL, VOIDmode, \
486 gen_rtx_MEM (FUNCTION_MODE, \
487 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
491 /* External function declarations. */
494 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
495 #define PROTO(ARGS) ARGS
497 #define PROTO(ARGS) ()
501 #ifdef BUFSIZ /* stdio.h has been included, ok to use FILE * */
502 #define STDIO_PROTO(ARGS) PROTO(ARGS)
504 #define STDIO_PROTO(ARGS) ()
507 extern void i386_pe_record_external_function PROTO((char *));
508 extern void i386_pe_declare_function_type STDIO_PROTO((FILE *, char *, int));
509 extern void i386_pe_record_exported_symbol PROTO((char *, int));
510 extern void i386_pe_asm_file_end STDIO_PROTO((FILE *));
512 /* For Win32 ABI compatibility */
513 #undef DEFAULT_PCC_STRUCT_RETURN
514 #define DEFAULT_PCC_STRUCT_RETURN 0
516 /* No data type wants to be aligned rounder than this. */
517 #undef BIGGEST_ALIGNMENT
518 #define BIGGEST_ALIGNMENT 128
520 /* A bitfield declared as `int' forces `int' alignment for the struct. */
521 #undef PCC_BITFIELDS_TYPE_MATTERS
522 #define PCC_BITFIELDS_TYPE_MATTERS 0
524 /* Enable alias attribute support. */
526 #define SET_ASM_OP "\t.set"