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, 2000
6 Free Software Foundation, Inc.
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
25 #define YES_UNDERSCORES
27 #define DBX_DEBUGGING_INFO
28 #define SDB_DEBUGGING_INFO
29 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
34 /* Augment TARGET_SWITCHES with the cygwin/no-cygwin options. */
35 #define MASK_WIN32 0x40000000 /* Use -lming32 interface */
36 #define MASK_CYGWIN 0x20000000 /* Use -lcygwin interface */
37 #define MASK_WINDOWS 0x10000000 /* Use windows interface */
38 #define MASK_DLL 0x08000000 /* Use dll interface */
39 #define MASK_NOP_FUN_DLLIMPORT 0x20000 /* Ignore dllimport for functions */
41 #define TARGET_WIN32 (target_flags & MASK_WIN32)
42 #define TARGET_CYGWIN (target_flags & MASK_CYGWIN)
43 #define TARGET_WINDOWS (target_flags & MASK_WINDOWS)
44 #define TARGET_DLL (target_flags & MASK_DLL)
45 #define TARGET_NOP_FUN_DLLIMPORT (target_flags & MASK_NOP_FUN_DLLIMPORT)
47 #undef SUBTARGET_SWITCHES
48 #define SUBTARGET_SWITCHES \
49 { "cygwin", MASK_CYGWIN, \
50 N_("Use the Cygwin interface") }, \
51 { "no-cygwin", MASK_WIN32, \
52 N_("Use the Mingw32 interface") }, \
53 { "windows", MASK_WINDOWS, N_("Create GUI application") }, \
54 { "console", -MASK_WINDOWS, \
55 N_("Create console application") }, \
56 { "dll", MASK_DLL, N_("Generate code for a DLL") }, \
57 { "nop-fun-dllimport", MASK_NOP_FUN_DLLIMPORT, \
58 N_("Ignore dllimport for functions") }, \
59 { "no-nop-fun-dllimport", -MASK_NOP_FUN_DLLIMPORT, "" }, \
60 { "threads", 0, N_("Use Mingw-specific thread support") },
63 /* Support the __declspec keyword by turning them into attributes.
64 We currently only support: dllimport and dllexport.
65 Note that the current way we do this may result in a collision with
66 predefined attributes later on. This can be solved by using one attribute,
67 say __declspec__, and passing args to it. The problem with that approach
68 is that args are not accumulated: each new appearance would clobber any
72 #define CPP_PREDEFINES "-D_WIN32 \
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 "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
88 -D__stdcall=__attribute__((__stdcall__)) \
89 -D__cdecl=__attribute__((__cdecl__)) \
90 %{!ansi:-D_stdcall=__attribute__((__stdcall__)) \
91 -D_cdecl=__attribute__((__cdecl__))} \
92 -D__declspec(x)=__attribute__((x)) \
93 %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__} \
94 %{mno-cygwin:-iwithprefixbefore \
95 ../../../../%(mingw_include_path)/include/mingw32 -D__MINGW32__=0.2}"
97 /* This macro defines names of additional specifications to put in the specs
98 that can be used in various specifications like CC1_SPEC. Its definition
99 is an initializer with a subgrouping for each command option.
101 Each subgrouping contains a string constant, that defines the
102 specification name, and a string constant that used by the GNU CC driver
105 Do not define this macro if it does not need to do anything. */
107 #undef SUBTARGET_EXTRA_SPECS
108 #define SUBTARGET_EXTRA_SPECS \
109 { "mingw_include_path", DEFAULT_TARGET_MACHINE }
111 /* We have to dynamic link to get to the system DLLs. All of libc, libm and
112 the Unix stuff is in cygwin.dll. The import library is called
113 'libcygwin.a'. For Windows applications, include more libraries, but
114 always include kernel32. We'd like to specific subsystem windows to
115 ld, but that doesn't work just yet. */
118 #define LIB_SPEC "%{pg:-lgmon} \
119 %{!mno-cygwin:-lcygwin} \
120 %{mno-cygwin:-lmingw32 -lmoldname -lcrtdll} \
121 %{mwindows:-lgdi32 -lcomdlg32} \
122 -luser32 -lkernel32 -ladvapi32 -lshell32"
124 #define LINK_SPEC "%{mwindows:--subsystem windows} \
125 %{mconsole:--subsystem console} \
126 %{mdll:--dll -e _DllMainCRTStartup@12}"
129 #define SIZE_TYPE "unsigned int"
130 #define PTRDIFF_TYPE "int"
131 #define WCHAR_UNSIGNED 1
132 #define WCHAR_TYPE_SIZE 16
133 #define WCHAR_TYPE "short unsigned int"
136 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
137 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
139 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
140 is a valid machine specific attribute for DECL.
141 The attributes in ATTRIBUTES have previously been assigned to DECL. */
142 extern int i386_pe_valid_decl_attribute_p ();
144 #undef VALID_MACHINE_DECL_ATTRIBUTE
145 #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \
146 i386_pe_valid_decl_attribute_p (DECL, ATTRIBUTES, IDENTIFIER, ARGS)
148 /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS
149 is a valid machine specific attribute for TYPE.
150 The attributes in ATTRIBUTES have previously been assigned to TYPE. */
152 #undef VALID_MACHINE_TYPE_ATTRIBUTE
153 #define VALID_MACHINE_TYPE_ATTRIBUTE(TYPE, ATTRIBUTES, IDENTIFIER, ARGS) \
154 i386_pe_valid_type_attribute_p (TYPE, ATTRIBUTES, IDENTIFIER, ARGS)
155 extern int i386_pe_valid_type_attribute_p ();
157 extern union tree_node *i386_pe_merge_decl_attributes ();
158 #define MERGE_MACHINE_DECL_ATTRIBUTES(OLD, NEW) \
159 i386_pe_merge_decl_attributes ((OLD), (NEW))
161 /* Used to implement dllexport overriding dllimport semantics. It's also used
162 to handle vtables - the first pass won't do anything because
163 DECL_CONTEXT (DECL) will be 0 so i386_pe_dll{ex,im}port_p will return 0.
164 It's also used to handle dllimport override semantics. */
166 #define REDO_SECTION_INFO_P(DECL) \
167 ((DECL_MACHINE_ATTRIBUTES (DECL) != NULL_TREE) \
168 || (TREE_CODE (DECL) == VAR_DECL && DECL_VIRTUAL_P (DECL)))
170 #define REDO_SECTION_INFO_P(DECL) 1
174 #undef EXTRA_SECTIONS
175 #define EXTRA_SECTIONS in_ctor, in_dtor, in_drectve
177 #undef EXTRA_SECTION_FUNCTIONS
178 #define EXTRA_SECTION_FUNCTIONS \
179 CTOR_SECTION_FUNCTION \
180 DTOR_SECTION_FUNCTION \
181 DRECTVE_SECTION_FUNCTION \
182 SWITCH_TO_SECTION_FUNCTION
184 #define CTOR_SECTION_FUNCTION \
188 if (in_section != in_ctor) \
190 fprintf (asm_out_file, "\t.section .ctor\n"); \
191 in_section = in_ctor; \
195 #define DTOR_SECTION_FUNCTION \
199 if (in_section != in_dtor) \
201 fprintf (asm_out_file, "\t.section .dtor\n"); \
202 in_section = in_dtor; \
206 #define DRECTVE_SECTION_FUNCTION \
210 if (in_section != in_drectve) \
212 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \
213 in_section = in_drectve; \
217 /* Switch to SECTION (an `enum in_section').
219 ??? This facility should be provided by GCC proper.
220 The problem is that we want to temporarily switch sections in
221 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
223 #define SWITCH_TO_SECTION_FUNCTION \
225 switch_to_section (section, decl) \
226 enum in_section section; \
231 case in_text: text_section (); break; \
232 case in_data: data_section (); break; \
233 case in_named: named_section (decl, NULL, 0); break; \
234 case in_ctor: ctor_section (); break; \
235 case in_dtor: dtor_section (); break; \
236 case in_drectve: drectve_section (); break; \
237 default: abort (); break; \
241 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
244 fprintf (FILE, "%s\t", ASM_LONG); \
245 assemble_name (FILE, NAME); \
246 fprintf (FILE, "\n"); \
249 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
252 fprintf (FILE, "%s\t", ASM_LONG); \
253 assemble_name (FILE, NAME); \
254 fprintf (FILE, "\n"); \
257 /* Don't allow flag_pic to propagate since gas may produce invalid code
260 #undef SUBTARGET_OVERRIDE_OPTIONS
261 #define SUBTARGET_OVERRIDE_OPTIONS \
265 warning ("-f%s ignored for target (all code is position independent)",\
266 (flag_pic > 1) ? "PIC" : "pic"); \
271 /* Define this macro if references to a symbol must be treated
272 differently depending on something about the variable or
273 function named by the symbol (such as what section it is in).
275 On i386 running Windows NT, modify the assembler name with a suffix
276 consisting of an atsign (@) followed by string of digits that represents
277 the number of bytes of arguments passed to the function, if it has the
280 In addition, we must mark dll symbols specially. Definitions of
281 dllexport'd objects install some info in the .drectve section.
282 References to dllimport'd objects are fetched indirectly via
283 _imp__. If both are declared, dllexport overrides. This is also
284 needed to implement one-only vtables: they go into their own
285 section and we need to set DECL_SECTION_NAME so we do that here.
286 Note that we can be called twice on the same decl. */
288 extern void i386_pe_encode_section_info ();
290 #ifdef ENCODE_SECTION_INFO
291 #undef ENCODE_SECTION_INFO
293 #define ENCODE_SECTION_INFO(DECL) i386_pe_encode_section_info (DECL)
295 /* Utility used only in this file. */
296 #define I386_PE_STRIP_ENCODING(SYM_NAME) \
297 ((SYM_NAME) + ((SYM_NAME)[0] == '@' ? 3 : 0))
299 /* This macro gets just the user-specified name
300 out of the string in a SYMBOL_REF. Discard
301 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
302 #undef STRIP_NAME_ENCODING
303 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
306 const char *_name = I386_PE_STRIP_ENCODING (SYMBOL_NAME); \
307 for (_p = _name; *_p && *_p != '@'; ++_p) \
311 int _len = _p - _name; \
312 char *_new_name = (char *) alloca (_len + 1); \
313 strncpy (_new_name, _name, _len); \
314 _new_name[_len] = '\0'; \
322 /* Output a reference to a label. */
323 #undef ASM_OUTPUT_LABELREF
324 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
325 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \
326 I386_PE_STRIP_ENCODING (NAME)) \
328 /* Output a common block. */
329 #undef ASM_OUTPUT_COMMON
330 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
332 if (i386_pe_dllexport_name_p (NAME)) \
333 i386_pe_record_exported_symbol (NAME, 1); \
334 if (! i386_pe_dllimport_name_p (NAME)) \
336 fprintf ((STREAM), "\t.comm\t"); \
337 assemble_name ((STREAM), (NAME)); \
338 fprintf ((STREAM), ", %d\t%s %d\n", \
339 (ROUNDED), ASM_COMMENT_START, (SIZE)); \
343 /* Output the label for an initialized variable. */
344 #undef ASM_DECLARE_OBJECT_NAME
345 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
347 if (i386_pe_dllexport_name_p (NAME)) \
348 i386_pe_record_exported_symbol (NAME, 1); \
349 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
353 /* Emit code to check the stack when allocating more that 4000
356 #define CHECK_STACK_LIMIT 4000
358 /* By default, target has a 80387, uses IEEE compatible arithmetic,
359 and returns float values in the 387 and needs stack probes */
360 #undef TARGET_DEFAULT
362 #define TARGET_DEFAULT \
363 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE)
365 /* This is how to output an assembler line
366 that says to advance the location counter
367 to a multiple of 2**LOG bytes. */
369 #undef ASM_OUTPUT_ALIGN
370 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
371 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
373 /* Define this macro if in some cases global symbols from one translation
374 unit may not be bound to undefined symbols in another translation unit
375 without user intervention. For instance, under Microsoft Windows
376 symbols must be explicitly imported from shared libraries (DLLs). */
377 #define MULTIPLE_SYMBOL_SPACES
379 #define UNIQUE_SECTION_P(DECL) DECL_ONE_ONLY (DECL)
380 extern void i386_pe_unique_section ();
381 #define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
383 #define SUPPORTS_ONE_ONLY 1
385 /* A C statement to output something to the assembler file to switch to section
386 NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or
387 NULL_TREE. Some target formats do not support arbitrary sections. Do not
388 define this macro in such cases. */
389 #undef ASM_OUTPUT_SECTION_NAME
390 #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME, RELOC) \
392 static struct section_info \
394 struct section_info *next; \
396 enum sect_enum {SECT_RW, SECT_RO, SECT_EXEC} type; \
398 struct section_info *s; \
400 enum sect_enum type; \
402 for (s = sections; s; s = s->next) \
403 if (!strcmp (NAME, s->name)) \
406 if (DECL && TREE_CODE (DECL) == FUNCTION_DECL) \
407 type = SECT_EXEC, mode = "x"; \
408 else if (DECL && DECL_READONLY_SECTION (DECL, RELOC)) \
409 type = SECT_RO, mode = ""; \
413 if (TREE_CODE (DECL) == VAR_DECL \
414 && lookup_attribute ("shared", DECL_MACHINE_ATTRIBUTES (DECL))) \
422 s = (struct section_info *) xmalloc (sizeof (struct section_info)); \
423 s->name = xmalloc ((strlen (NAME) + 1) * sizeof (*NAME)); \
424 strcpy (s->name, NAME); \
426 s->next = sections; \
428 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
429 /* Functions may have been compiled at various levels of \
430 optimization so we can't use `same_size' here. Instead, \
431 have the linker pick one. */ \
432 if ((DECL) && DECL_ONE_ONLY (DECL)) \
433 fprintf (STREAM, "\t.linkonce %s\n", \
434 TREE_CODE (DECL) == FUNCTION_DECL \
435 ? "discard" : "same_size"); \
439 fprintf (STREAM, ".section\t%s,\"%s\"\n", NAME, mode); \
443 /* Write the extra assembler code needed to declare a function
444 properly. If we are generating SDB debugging information, this
445 will happen automatically, so we only need to handle other cases. */
446 #undef ASM_DECLARE_FUNCTION_NAME
447 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
450 if (i386_pe_dllexport_name_p (NAME)) \
451 i386_pe_record_exported_symbol (NAME, 0); \
452 if (write_symbols != SDB_DEBUG) \
453 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
454 ASM_OUTPUT_LABEL (FILE, NAME); \
458 /* Add an external function to the list of functions to be declared at
459 the end of the file. */
460 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
463 if (TREE_CODE (DECL) == FUNCTION_DECL) \
464 i386_pe_record_external_function (NAME); \
468 /* Declare the type properly for any external libcall. */
469 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
470 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
472 /* This says out to put a global symbol in the BSS section. */
473 #undef ASM_OUTPUT_ALIGNED_BSS
474 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
475 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
477 /* Output function declarations at the end of the file. */
478 #define ASM_FILE_END(FILE) \
479 i386_pe_asm_file_end (FILE)
481 #undef ASM_COMMENT_START
482 #define ASM_COMMENT_START " #"
484 /* DWARF2 Unwinding doesn't work with exception handling yet. */
485 #define DWARF2_UNWIND_INFO 0
487 /* Don't assume anything about the header files. */
488 #define NO_IMPLICIT_EXTERN_C
490 #define SUBTARGET_PROLOGUE \
492 && MAIN_NAME_P (DECL_NAME (current_function_decl))) \
494 emit_call_insn (gen_rtx (CALL, VOIDmode, \
495 gen_rtx_MEM (FUNCTION_MODE, \
496 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
500 /* External function declarations. */
503 #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__)
504 #define PARAMS(ARGS) ARGS
506 #define PARAMS(ARGS) ()
510 #ifdef BUFSIZ /* stdio.h has been included, ok to use FILE * */
511 #define STDIO_PARAMS(ARGS) PARAMS(ARGS)
513 #define STDIO_PARAMS(ARGS) ()
516 extern void i386_pe_record_external_function PARAMS ((char *));
517 extern void i386_pe_declare_function_type STDIO_PARAMS ((FILE *, char *, int));
518 extern void i386_pe_record_exported_symbol PARAMS ((char *, int));
519 extern void i386_pe_asm_file_end STDIO_PARAMS ((FILE *));
521 /* For Win32 ABI compatibility */
522 #undef DEFAULT_PCC_STRUCT_RETURN
523 #define DEFAULT_PCC_STRUCT_RETURN 0
525 /* No data type wants to be aligned rounder than this. */
526 #undef BIGGEST_ALIGNMENT
527 #define BIGGEST_ALIGNMENT 128
529 /* A bitfield declared as `int' forces `int' alignment for the struct. */
530 #undef PCC_BITFIELDS_TYPE_MATTERS
531 #define PCC_BITFIELDS_TYPE_MATTERS 0
533 /* Enable alias attribute support. */
535 #define SET_ASM_OP "\t.set\t"
539 #define INT_ASM_OP "\t.long\t"