1 /* Subroutines for insn-output.c for Windows NT.
2 Contributed by Douglas Rupp (drupp@cs.washington.edu)
3 Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
4 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 2, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to the Free
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 #include "coretypes.h"
29 #include "hard-reg-set.h"
38 /* i386/PE specific attribute support.
40 i386/PE has two new attributes:
41 dllexport - for exporting a function/variable that will live in a dll
42 dllimport - for importing a function/variable from a dll
44 Microsoft allows multiple declspecs in one __declspec, separating
45 them with spaces. We do NOT support this. Instead, use __declspec
49 static tree associated_type (tree);
50 static const char * gen_stdcall_suffix (tree);
51 static const char * gen_fastcall_suffix (tree);
52 static int i386_pe_dllexport_p (tree);
53 static int i386_pe_dllimport_p (tree);
54 static void i386_pe_mark_dllexport (tree);
55 static void i386_pe_mark_dllimport (tree);
57 /* This is we how mark internal identifiers with dllimport or dllexport
59 #ifndef DLL_IMPORT_PREFIX
60 #define DLL_IMPORT_PREFIX "#i."
62 #ifndef DLL_EXPORT_PREFIX
63 #define DLL_EXPORT_PREFIX "#e."
66 /* Handle a "dllimport" or "dllexport" attribute;
67 arguments as in struct attribute_spec.handler. */
69 ix86_handle_dll_attribute (tree * pnode, tree name, tree args, int flags,
74 /* These attributes may apply to structure and union types being created,
75 but otherwise should pass to the declaration involved. */
78 if (flags & ((int) ATTR_FLAG_DECL_NEXT | (int) ATTR_FLAG_FUNCTION_NEXT
79 | (int) ATTR_FLAG_ARRAY_NEXT))
82 return tree_cons (name, args, NULL_TREE);
84 if (TREE_CODE (node) != RECORD_TYPE && TREE_CODE (node) != UNION_TYPE)
86 warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
93 /* Report error on dllimport ambiguities seen now before they cause
95 else if (is_attribute_p ("dllimport", name))
97 /* Like MS, treat definition of dllimported variables and
98 non-inlined functions on declaration as syntax errors.
99 We allow the attribute for function definitions if declared
100 inline, but just ignore it in i386_pe_dllimport_p. */
101 if (TREE_CODE (node) == FUNCTION_DECL && DECL_INITIAL (node)
102 && !DECL_INLINE (node))
104 error ("%Jfunction `%D' definition is marked dllimport.", node, node);
105 *no_add_attrs = true;
108 else if (TREE_CODE (node) == VAR_DECL)
110 if (DECL_INITIAL (node))
112 error ("%Jvariable `%D' definition is marked dllimport.",
114 *no_add_attrs = true;
117 /* `extern' needn't be specified with dllimport.
118 Specify `extern' now and hope for the best. Sigh. */
119 DECL_EXTERNAL (node) = 1;
120 /* Also, implicitly give dllimport'd variables declared within
121 a function global scope, unless declared static. */
122 if (current_function_decl != NULL_TREE && !TREE_STATIC (node))
123 TREE_PUBLIC (node) = 1;
127 /* Report error if symbol is not accessible at global scope. */
128 if (!TREE_PUBLIC (node)
129 && (TREE_CODE (node) == VAR_DECL
130 || TREE_CODE (node) == FUNCTION_DECL))
132 error ("%Jexternal linkage required for symbol '%D' because of "
133 "'%s' attribute.", node, node, IDENTIFIER_POINTER (name));
134 *no_add_attrs = true;
140 /* Handle a "shared" attribute;
141 arguments as in struct attribute_spec.handler. */
143 ix86_handle_shared_attribute (tree *node, tree name,
144 tree args ATTRIBUTE_UNUSED,
145 int flags ATTRIBUTE_UNUSED, bool *no_add_attrs)
147 if (TREE_CODE (*node) != VAR_DECL)
149 warning ("`%s' attribute only applies to variables",
150 IDENTIFIER_POINTER (name));
151 *no_add_attrs = true;
157 /* Return the type that we should use to determine if DECL is
158 imported or exported. */
161 associated_type (tree decl)
165 /* In the C++ frontend, DECL_CONTEXT for a method doesn't actually refer
166 to the containing class. So we look at the 'this' arg. */
167 if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
169 /* Artificial methods are not affected by the import/export status
170 of their class unless they are COMDAT. Implicit copy ctor's and
171 dtor's are not affected by class status but virtual and
172 non-virtual thunks are. */
173 if (!DECL_ARTIFICIAL (decl) || DECL_COMDAT (decl))
174 t = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl))));
176 else if (DECL_CONTEXT (decl)
177 && TREE_CODE_CLASS (TREE_CODE (DECL_CONTEXT (decl))) == 't')
178 t = DECL_CONTEXT (decl);
183 /* Return nonzero if DECL is a dllexport'd object. */
186 i386_pe_dllexport_p (tree decl)
190 if (TREE_CODE (decl) != VAR_DECL
191 && TREE_CODE (decl) != FUNCTION_DECL)
193 exp = lookup_attribute ("dllexport", DECL_ATTRIBUTES (decl));
197 /* Class members get the dllexport status of their class. */
198 if (associated_type (decl))
200 exp = lookup_attribute ("dllexport",
201 TYPE_ATTRIBUTES (associated_type (decl)));
209 /* Return nonzero if DECL is a dllimport'd object. */
212 i386_pe_dllimport_p (tree decl)
217 if (TREE_CODE (decl) == FUNCTION_DECL
218 && TARGET_NOP_FUN_DLLIMPORT)
221 if (TREE_CODE (decl) != VAR_DECL
222 && TREE_CODE (decl) != FUNCTION_DECL)
225 imp = lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl));
227 /* Class members get the dllimport status of their class. */
228 if (!imp && associated_type (decl))
230 imp = lookup_attribute ("dllimport",
231 TYPE_ATTRIBUTES (associated_type (decl)));
238 /* Don't mark defined functions as dllimport. If the definition
239 itself was marked with dllimport, than ix86_handle_dll_attribute
240 reports an error. This handles the case when the definition
241 overrides an earlier declaration. */
242 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl)
243 && !DECL_INLINE (decl))
245 /* Don't warn about artificial methods. */
246 if (!DECL_ARTIFICIAL (decl))
247 warning ("%Jfunction '%D' is defined after prior declaration "
248 "as dllimport: attribute ignored", decl, decl);
252 /* We ignore the dllimport attribute for inline member functions.
253 This differs from MSVC behavior which treats it like GNUC
254 'extern inline' extension. */
255 else if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl))
258 warning ("%Jinline function '%D' is declared as dllimport: "
259 "attribute ignored.", decl, decl);
263 /* Don't allow definitions of static data members in dllimport class,
264 Just ignore attribute for vtable data. */
265 else if (TREE_CODE (decl) == VAR_DECL
266 && TREE_STATIC (decl) && TREE_PUBLIC (decl)
267 && !DECL_EXTERNAL (decl) && context_imp)
269 if (!DECL_VIRTUAL_P (decl))
270 error ("%Jdefinition of static data member '%D' of "
271 "dllimport'd class.", decl, decl);
275 /* Since we can't treat a pointer to a dllimport'd symbol as a
276 constant address, we turn off the attribute on C++ virtual
277 methods to allow creation of vtables using thunks. Don't mark
278 artificial methods either (in associated_type, only COMDAT
279 artificial method get import status from class context). */
280 else if (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE
281 && (DECL_VIRTUAL_P (decl) || DECL_ARTIFICIAL (decl)))
290 /* Return nonzero if SYMBOL is marked as being dllexport'd. */
293 i386_pe_dllexport_name_p (const char *symbol)
295 return (strncmp (DLL_EXPORT_PREFIX, symbol,
296 strlen (DLL_EXPORT_PREFIX)) == 0);
299 /* Return nonzero if SYMBOL is marked as being dllimport'd. */
302 i386_pe_dllimport_name_p (const char *symbol)
304 return (strncmp (DLL_IMPORT_PREFIX, symbol,
305 strlen (DLL_IMPORT_PREFIX)) == 0);
308 /* Mark a DECL as being dllexport'd.
309 Note that we override the previous setting (eg: dllimport). */
312 i386_pe_mark_dllexport (tree decl)
319 rtlname = XEXP (DECL_RTL (decl), 0);
320 if (GET_CODE (rtlname) == SYMBOL_REF)
321 oldname = XSTR (rtlname, 0);
322 else if (GET_CODE (rtlname) == MEM
323 && GET_CODE (XEXP (rtlname, 0)) == SYMBOL_REF)
324 oldname = XSTR (XEXP (rtlname, 0), 0);
327 if (i386_pe_dllimport_name_p (oldname))
329 warning ("%Jinconsistent dll linkage for '%D', dllexport assumed.",
331 /* Remove DLL_IMPORT_PREFIX. */
332 oldname += strlen (DLL_IMPORT_PREFIX);
333 DECL_NON_ADDR_CONST_P (decl) = 0;
335 else if (i386_pe_dllexport_name_p (oldname))
336 return; /* already done */
338 newname = alloca (strlen (DLL_EXPORT_PREFIX) + strlen (oldname) + 1);
339 sprintf (newname, "%s%s", DLL_EXPORT_PREFIX, oldname);
341 /* We pass newname through get_identifier to ensure it has a unique
342 address. RTL processing can sometimes peek inside the symbol ref
343 and compare the string's addresses to see if two symbols are
345 idp = get_identifier (newname);
347 XEXP (DECL_RTL (decl), 0) =
348 gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
351 /* Mark a DECL as being dllimport'd. */
354 i386_pe_mark_dllimport (tree decl)
361 rtlname = XEXP (DECL_RTL (decl), 0);
362 if (GET_CODE (rtlname) == SYMBOL_REF)
363 oldname = XSTR (rtlname, 0);
364 else if (GET_CODE (rtlname) == MEM
365 && GET_CODE (XEXP (rtlname, 0)) == SYMBOL_REF)
366 oldname = XSTR (XEXP (rtlname, 0), 0);
369 if (i386_pe_dllexport_name_p (oldname))
371 error ("`%s' declared as both exported to and imported from a DLL",
372 IDENTIFIER_POINTER (DECL_NAME (decl)));
375 else if (i386_pe_dllimport_name_p (oldname))
377 /* Already done, but do a sanity check to prevent assembler errors. */
378 if (!DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl))
380 error ("%Jfailure in redeclaration of '%D': dllimport'd "
381 "symbol lacks external linkage.", decl, decl);
387 newname = alloca (strlen (DLL_IMPORT_PREFIX) + strlen (oldname) + 1);
388 sprintf (newname, "%s%s", DLL_IMPORT_PREFIX, oldname);
390 /* We pass newname through get_identifier to ensure it has a unique
391 address. RTL processing can sometimes peek inside the symbol ref
392 and compare the string's addresses to see if two symbols are
394 idp = get_identifier (newname);
396 newrtl = gen_rtx_MEM (Pmode,
397 gen_rtx_SYMBOL_REF (Pmode,
398 IDENTIFIER_POINTER (idp)));
399 XEXP (DECL_RTL (decl), 0) = newrtl;
401 /* Can't treat a pointer to this as a constant address */
402 DECL_NON_ADDR_CONST_P (decl) = 1;
405 /* Return string which is the former assembler name modified with a
406 prefix consisting of FASTCALL_PREFIX and a suffix consisting of an
407 atsign (@) followed by the number of bytes of arguments. */
410 gen_fastcall_suffix (tree decl)
413 const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
416 if (TYPE_ARG_TYPES (TREE_TYPE (decl)))
417 if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (decl))))
420 tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
422 /* Quit if we hit an incomplete type. Error is reported
423 by convert_arguments in c-typeck.c or cp/typeck.c. */
424 while (TREE_VALUE (formal_type) != void_type_node
425 && COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
428 = TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
429 /* Must round up to include padding. This is done the same
430 way as in store_one_arg. */
431 parm_size = ((parm_size + PARM_BOUNDARY - 1)
432 / PARM_BOUNDARY * PARM_BOUNDARY);
434 formal_type = TREE_CHAIN (formal_type);
438 /* Assume max of 8 base 10 digits in the suffix. */
439 newsym = xmalloc (1 + strlen (asmname) + 1 + 8 + 1);
440 sprintf (newsym, "%c%s@%d", FASTCALL_PREFIX, asmname, total/BITS_PER_UNIT);
441 return IDENTIFIER_POINTER (get_identifier (newsym));
444 /* Return string which is the former assembler name modified with a
445 suffix consisting of an atsign (@) followed by the number of bytes of
449 gen_stdcall_suffix (tree decl)
452 /* ??? This probably should use XSTR (XEXP (DECL_RTL (decl), 0), 0) instead
453 of DECL_ASSEMBLER_NAME. */
454 const char *asmname = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
457 if (TYPE_ARG_TYPES (TREE_TYPE (decl)))
458 if (TREE_VALUE (tree_last (TYPE_ARG_TYPES (TREE_TYPE (decl))))
461 tree formal_type = TYPE_ARG_TYPES (TREE_TYPE (decl));
463 /* Quit if we hit an incomplete type. Error is reported
464 by convert_arguments in c-typeck.c or cp/typeck.c. */
465 while (TREE_VALUE (formal_type) != void_type_node
466 && COMPLETE_TYPE_P (TREE_VALUE (formal_type)))
469 = TREE_INT_CST_LOW (TYPE_SIZE (TREE_VALUE (formal_type)));
470 /* Must round up to include padding. This is done the same
471 way as in store_one_arg. */
472 parm_size = ((parm_size + PARM_BOUNDARY - 1)
473 / PARM_BOUNDARY * PARM_BOUNDARY);
475 formal_type = TREE_CHAIN (formal_type);
479 /* Assume max of 8 base 10 digits in the suffix. */
480 newsym = xmalloc (strlen (asmname) + 1 + 8 + 1);
481 sprintf (newsym, "%s@%d", asmname, total/BITS_PER_UNIT);
482 return IDENTIFIER_POINTER (get_identifier (newsym));
486 i386_pe_encode_section_info (tree decl, rtx rtl, int first)
488 default_encode_section_info (decl, rtl, first);
490 if (TREE_CODE (decl) == FUNCTION_DECL)
492 if (lookup_attribute ("stdcall",
493 TYPE_ATTRIBUTES (TREE_TYPE (decl))))
494 XEXP (DECL_RTL (decl), 0) =
495 gen_rtx_SYMBOL_REF (Pmode, gen_stdcall_suffix (decl));
496 else if (lookup_attribute ("fastcall",
497 TYPE_ATTRIBUTES (TREE_TYPE (decl))))
498 XEXP (DECL_RTL (decl), 0) =
499 gen_rtx_SYMBOL_REF (Pmode, gen_fastcall_suffix (decl));
502 /* Mark the decl so we can tell from the rtl whether the object is
503 dllexport'd or dllimport'd. This also handles dllexport/dllimport
504 override semantics. */
506 if (i386_pe_dllexport_p (decl))
507 i386_pe_mark_dllexport (decl);
508 else if (i386_pe_dllimport_p (decl))
509 i386_pe_mark_dllimport (decl);
510 /* It might be that DECL has already been marked as dllimport, but a
511 subsequent definition nullified that. The attribute is gone but
512 DECL_RTL still has (DLL_IMPORT_PREFIX) prefixed. We need to remove
513 that. Ditto for the DECL_NON_ADDR_CONST_P flag. */
514 else if ((TREE_CODE (decl) == FUNCTION_DECL
515 || TREE_CODE (decl) == VAR_DECL)
516 && DECL_RTL (decl) != NULL_RTX
517 && GET_CODE (DECL_RTL (decl)) == MEM
518 && GET_CODE (XEXP (DECL_RTL (decl), 0)) == MEM
519 && GET_CODE (XEXP (XEXP (DECL_RTL (decl), 0), 0)) == SYMBOL_REF
520 && i386_pe_dllimport_name_p (XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0)))
522 const char *oldname = XSTR (XEXP (XEXP (DECL_RTL (decl), 0), 0), 0);
524 /* Remove DLL_IMPORT_PREFIX. */
525 tree idp = get_identifier (oldname + strlen (DLL_IMPORT_PREFIX));
526 rtx newrtl = gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (idp));
528 if (DECL_INITIAL (decl) || !DECL_EXTERNAL (decl))
529 warning ("%J'%D' defined locally after being "
530 "referenced with dllimport linkage", decl, decl);
532 warning ("%J'%D' redeclared without dllimport attribute "
533 "after being referenced with dllimport linkage", decl, decl);
535 XEXP (DECL_RTL (decl), 0) = newrtl;
537 DECL_NON_ADDR_CONST_P (decl) = 0;
539 /* We previously set TREE_PUBLIC and DECL_EXTERNAL.
540 We leave these alone for now. */
544 /* Strip only the leading encoding, leaving the stdcall suffix and fastcall
545 prefix if it exists. */
548 i386_pe_strip_name_encoding (const char *str)
550 if (strncmp (str, DLL_IMPORT_PREFIX, strlen (DLL_IMPORT_PREFIX))
552 str += strlen (DLL_IMPORT_PREFIX);
553 else if (strncmp (str, DLL_EXPORT_PREFIX, strlen (DLL_EXPORT_PREFIX))
555 str += strlen (DLL_EXPORT_PREFIX);
561 /* Also strip the stdcall suffix. */
564 i386_pe_strip_name_encoding_full (const char *str)
567 const char *name = i386_pe_strip_name_encoding (str);
569 p = strchr (name, '@');
571 return ggc_alloc_string (name, p - name);
576 /* Output a reference to a label. Fastcall symbols are prefixed with @,
577 whereas symbols for functions using other calling conventions don't
578 have a prefix (unless they are marked dllimport or dllexport). */
580 void i386_pe_output_labelref (FILE *stream, const char *name)
582 if (strncmp (name, DLL_IMPORT_PREFIX, strlen (DLL_IMPORT_PREFIX))
586 if (name[strlen (DLL_IMPORT_PREFIX)] == FASTCALL_PREFIX)
587 /* A dllimport fastcall symbol. */
589 fprintf (stream, "__imp_%s",
590 i386_pe_strip_name_encoding (name));
593 /* A dllimport non-fastcall symbol. */
595 fprintf (stream, "__imp__%s",
596 i386_pe_strip_name_encoding (name));
599 else if ((name[0] == FASTCALL_PREFIX)
600 || (strncmp (name, DLL_EXPORT_PREFIX, strlen (DLL_EXPORT_PREFIX)
602 && name[strlen (DLL_EXPORT_PREFIX)] == FASTCALL_PREFIX)))
603 /* A fastcall symbol. */
605 fprintf (stream, "%s",
606 i386_pe_strip_name_encoding (name));
609 /* Everything else. */
611 fprintf (stream, "%s%s", USER_LABEL_PREFIX,
612 i386_pe_strip_name_encoding (name));
617 i386_pe_unique_section (tree decl, int reloc)
620 const char *name, *prefix;
623 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
624 name = i386_pe_strip_name_encoding_full (name);
626 /* The object is put in, for example, section .text$foo.
627 The linker will then ultimately place them in .text
628 (everything from the $ on is stripped). Don't put
629 read-only data in .rdata section to avoid a PE linker
630 bug when .rdata$* grouped sections are used in code
631 without a .rdata section. */
632 if (TREE_CODE (decl) == FUNCTION_DECL)
634 else if (decl_readonly_section (decl, reloc))
638 len = strlen (name) + strlen (prefix);
639 string = alloca (len + 1);
640 sprintf (string, "%s%s", prefix, name);
642 DECL_SECTION_NAME (decl) = build_string (len, string);
645 /* Select a set of attributes for section NAME based on the properties
646 of DECL and whether or not RELOC indicates that DECL's initializer
647 might contain runtime relocations.
649 We make the section read-only and executable for a function decl,
650 read-only for a const data decl, and writable for a non-const data decl.
652 If the section has already been defined, to not allow it to have
653 different attributes, as (1) this is ambiguous since we're not seeing
654 all the declarations up front and (2) some assemblers (e.g. SVR4)
655 do not recognize section redefinitions. */
656 /* ??? This differs from the "standard" PE implementation in that we
657 handle the SHARED variable attribute. Should this be done for all
660 #define SECTION_PE_SHARED SECTION_MACH_DEP
663 i386_pe_section_type_flags (tree decl, const char *name, int reloc)
669 /* The names we put in the hashtable will always be the unique
670 versions gived to us by the stringtable, so we can just use
671 their addresses as the keys. */
673 htab = htab_create (31, htab_hash_pointer, htab_eq_pointer, NULL);
675 if (decl && TREE_CODE (decl) == FUNCTION_DECL)
676 flags = SECTION_CODE;
677 else if (decl && decl_readonly_section (decl, reloc))
681 flags = SECTION_WRITE;
683 if (decl && TREE_CODE (decl) == VAR_DECL
684 && lookup_attribute ("shared", DECL_ATTRIBUTES (decl)))
685 flags |= SECTION_PE_SHARED;
688 if (decl && DECL_ONE_ONLY (decl))
689 flags |= SECTION_LINKONCE;
691 /* See if we already have an entry for this section. */
692 slot = (unsigned int **) htab_find_slot (htab, name, INSERT);
695 *slot = (unsigned int *) xmalloc (sizeof (unsigned int));
700 if (decl && **slot != flags)
701 error ("%J'%D' causes a section type conflict", decl, decl);
708 i386_pe_asm_named_section (const char *name, unsigned int flags)
710 char flagchars[8], *f = flagchars;
712 if ((flags & (SECTION_CODE | SECTION_WRITE)) == 0)
715 *f++ ='d'; /* This is necessary for older versions of gas. */
720 if (flags & SECTION_CODE)
722 if (flags & SECTION_WRITE)
724 if (flags & SECTION_PE_SHARED)
730 fprintf (asm_out_file, "\t.section\t%s,\"%s\"\n", name, flagchars);
732 if (flags & SECTION_LINKONCE)
734 /* Functions may have been compiled at various levels of
735 optimization so we can't use `same_size' here.
736 Instead, have the linker pick one. */
737 fprintf (asm_out_file, "\t.linkonce %s\n",
738 (flags & SECTION_CODE ? "discard" : "same_size"));
742 /* The Microsoft linker requires that every function be marked as
743 DT_FCN. When using gas on cygwin, we must emit appropriate .type
748 /* Mark a function appropriately. This should only be called for
749 functions for which we are not emitting COFF debugging information.
750 FILE is the assembler output file, NAME is the name of the
751 function, and PUBLIC is nonzero if the function is globally
755 i386_pe_declare_function_type (FILE *file, const char *name, int public)
757 fprintf (file, "\t.def\t");
758 assemble_name (file, name);
759 fprintf (file, ";\t.scl\t%d;\t.type\t%d;\t.endef\n",
760 public ? (int) C_EXT : (int) C_STAT,
761 (int) DT_FCN << N_BTSHFT);
764 /* Keep a list of external functions. */
768 struct extern_list *next;
772 static struct extern_list *extern_head;
774 /* Assemble an external function reference. We need to keep a list of
775 these, so that we can output the function types at the end of the
776 assembly. We can't output the types now, because we might see a
777 definition of the function later on and emit debugging information
781 i386_pe_record_external_function (const char *name)
783 struct extern_list *p;
785 p = (struct extern_list *) xmalloc (sizeof *p);
786 p->next = extern_head;
791 /* Keep a list of exported symbols. */
795 struct export_list *next;
797 int is_data; /* used to type tag exported symbols. */
800 static struct export_list *export_head;
802 /* Assemble an export symbol entry. We need to keep a list of
803 these, so that we can output the export list at the end of the
804 assembly. We used to output these export symbols in each function,
805 but that causes problems with GNU ld when the sections are
809 i386_pe_record_exported_symbol (const char *name, int is_data)
811 struct export_list *p;
813 p = (struct export_list *) xmalloc (sizeof *p);
814 p->next = export_head;
816 p->is_data = is_data;
820 /* This is called at the end of assembly. For each external function
821 which has not been defined, we output a declaration now. We also
822 output the .drectve section. */
825 i386_pe_file_end (void)
827 struct extern_list *p;
831 for (p = extern_head; p != NULL; p = p->next)
835 decl = get_identifier (p->name);
837 /* Positively ensure only one declaration for any given symbol. */
838 if (! TREE_ASM_WRITTEN (decl) && TREE_SYMBOL_REFERENCED (decl))
840 TREE_ASM_WRITTEN (decl) = 1;
841 i386_pe_declare_function_type (asm_out_file, p->name,
848 struct export_list *q;
850 for (q = export_head; q != NULL; q = q->next)
852 fprintf (asm_out_file, "\t.ascii \" -export:%s%s\"\n",
853 i386_pe_strip_name_encoding (q->name),
854 (q->is_data) ? ",data" : "");