1 /* Routines to help build PEI-format DLLs (Win32 etc)
2 Copyright (C) 1998-2022 Free Software Foundation, Inc.
3 Written by DJ Delorie <dj@cygnus.com>
5 This file is part of the GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "libiberty.h"
26 #include "filenames.h"
27 #include "safe-ctype.h"
41 #include "coff/internal.h"
42 #include "../bfd/libcoff.h"
47 #define PE_IDATA4_SIZE 8
48 #define PE_IDATA5_SIZE 8
51 #define AOUTSZ PEPAOUTSZ
52 #define PEAOUTHDR PEPAOUTHDR
60 #ifndef PE_IDATA4_SIZE
61 #define PE_IDATA4_SIZE 4
64 #ifndef PE_IDATA5_SIZE
65 #define PE_IDATA5_SIZE 4
68 /* This file turns a regular Windows PE image into a DLL. Because of
69 the complexity of this operation, it has been broken down into a
70 number of separate modules which are all called by the main function
71 at the end of this file. This function is not re-entrant and is
72 normally only called once, so static variables are used to reduce
73 the number of parameters and return values required.
75 See also: ld/emultempl/pe.em and ld/emultempl/pep.em. */
77 /* Auto-import feature by Paul Sokolovsky
81 1. With this feature on, DLL clients can import variables from DLL
82 without any concern from their side (for example, without any source
85 2. This is done completely in bounds of the PE specification (to be fair,
86 there's a place where it pokes nose out of, but in practice it works).
87 So, resulting module can be used with any other PE compiler/linker.
89 3. Auto-import is fully compatible with standard import method and they
90 can be mixed together.
92 4. Overheads: space: 8 bytes per imported symbol, plus 20 for each
93 reference to it; load time: negligible; virtual/physical memory: should be
94 less than effect of DLL relocation, and I sincerely hope it doesn't affect
95 DLL sharability (too much).
99 The obvious and only way to get rid of dllimport insanity is to make client
100 access variable directly in the DLL, bypassing extra dereference. I.e.,
101 whenever client contains something like
105 address of dll_var in the command should be relocated to point into loaded
106 DLL. The aim is to make OS loader do so, and than make ld help with that.
107 Import section of PE made following way: there's a vector of structures
108 each describing imports from particular DLL. Each such structure points
109 to two other parallel vectors: one holding imported names, and one which
110 will hold address of corresponding imported name. So, the solution is
111 de-vectorize these structures, making import locations be sparse and
112 pointing directly into code. Before continuing, it is worth a note that,
113 while authors strives to make PE act ELF-like, there're some other people
114 make ELF act PE-like: elfvector, ;-) .
118 For each reference of data symbol to be imported from DLL (to set of which
119 belong symbols with name <sym>, if __imp_<sym> is found in implib), the
120 import fixup entry is generated. That entry is of type
121 IMAGE_IMPORT_DESCRIPTOR and stored in .idata$2 subsection. Each
122 fixup entry contains pointer to symbol's address within .text section
123 (marked with __fuN_<sym> symbol, where N is integer), pointer to DLL name
124 (so, DLL name is referenced by multiple entries), and pointer to symbol
125 name thunk. Symbol name thunk is singleton vector (__nm_th_<symbol>)
126 pointing to IMAGE_IMPORT_BY_NAME structure (__nm_<symbol>) directly
127 containing imported name. Here comes that "on the edge" problem mentioned
128 above: PE specification rambles that name vector (OriginalFirstThunk)
129 should run in parallel with addresses vector (FirstThunk), i.e. that they
130 should have same number of elements and terminated with zero. We violate
131 this, since FirstThunk points directly into machine code. But in practice,
132 OS loader implemented the sane way: it goes through OriginalFirstThunk and
133 puts addresses to FirstThunk, not something else. It once again should be
134 noted that dll and symbol name structures are reused across fixup entries
135 and should be there anyway to support standard import stuff, so sustained
136 overhead is 20 bytes per reference. Other question is whether having several
137 IMAGE_IMPORT_DESCRIPTORS for the same DLL is possible. Answer is yes, it is
138 done even by native compiler/linker (libth32's functions are in fact reside
139 in windows9x kernel32.dll, so if you use it, you have two
140 IMAGE_IMPORT_DESCRIPTORS for kernel32.dll). Yet other question is whether
141 referencing the same PE structures several times is valid. The answer is why
142 not, prohibiting that (detecting violation) would require more work on
143 behalf of loader than not doing it.
145 See also: ld/emultempl/pe.em and ld/emultempl/pep.em. */
147 static void add_bfd_to_link (bfd
*, const char *, struct bfd_link_info
*);
149 /* For emultempl/pe.em. */
151 def_file
* pe_def_file
= 0;
152 int pe_dll_export_everything
= 0;
153 int pe_dll_exclude_all_symbols
= 0;
154 int pe_dll_do_default_excludes
= 1;
155 int pe_dll_kill_ats
= 0;
156 int pe_dll_stdcall_aliases
= 0;
157 int pe_dll_warn_dup_exports
= 0;
158 int pe_dll_compat_implib
= 0;
159 int pe_dll_extra_pe_debug
= 0;
160 int pe_use_nul_prefixed_import_tables
= 0;
161 int pe_use_coff_long_section_names
= -1;
162 int pe_leading_underscore
= -1;
163 int pe_dll_enable_reloc_section
= 1;
165 /* Static variables and types. */
167 static bfd_vma image_base
;
168 static bfd
*filler_bfd
;
169 static struct bfd_section
*edata_s
, *reloc_s
;
170 static unsigned char *edata_d
, *reloc_d
;
171 static size_t edata_sz
, reloc_sz
;
172 static int runtime_pseudo_relocs_created
= 0;
173 static bool runtime_pseudp_reloc_v2_init
= false;
180 autofilter_entry_type
;
184 const char *target_name
;
185 const char *object_target
;
186 unsigned int imagebase_reloc
;
190 const autofilter_entry_type
* autofilter_symbollist
;
194 static const autofilter_entry_type autofilter_symbollist_generic
[] =
196 { STRING_COMMA_LEN ("_NULL_IMPORT_DESCRIPTOR") },
197 /* Entry point symbols. */
198 { STRING_COMMA_LEN ("DllMain") },
199 { STRING_COMMA_LEN ("DllMainCRTStartup") },
200 { STRING_COMMA_LEN ("_DllMainCRTStartup") },
201 /* Runtime pseudo-reloc. */
202 { STRING_COMMA_LEN ("_pei386_runtime_relocator") },
203 { STRING_COMMA_LEN ("do_pseudo_reloc") },
207 static const autofilter_entry_type autofilter_symbollist_i386
[] =
209 { STRING_COMMA_LEN ("_NULL_IMPORT_DESCRIPTOR") },
210 /* Entry point symbols, and entry hooks. */
211 { STRING_COMMA_LEN ("cygwin_crt0") },
213 { STRING_COMMA_LEN ("DllMain") },
214 { STRING_COMMA_LEN ("DllEntryPoint") },
215 { STRING_COMMA_LEN ("DllMainCRTStartup") },
216 { STRING_COMMA_LEN ("_cygwin_dll_entry") },
217 { STRING_COMMA_LEN ("_cygwin_crt0_common") },
218 { STRING_COMMA_LEN ("_cygwin_noncygwin_dll_entry") },
220 { STRING_COMMA_LEN ("DllMain@12") },
221 { STRING_COMMA_LEN ("DllEntryPoint@0") },
222 { STRING_COMMA_LEN ("DllMainCRTStartup@12") },
223 { STRING_COMMA_LEN ("_cygwin_dll_entry@12") },
224 { STRING_COMMA_LEN ("_cygwin_crt0_common@8") },
225 { STRING_COMMA_LEN ("_cygwin_noncygwin_dll_entry@12") },
226 { STRING_COMMA_LEN ("cygwin_attach_dll") },
228 { STRING_COMMA_LEN ("cygwin_premain0") },
229 { STRING_COMMA_LEN ("cygwin_premain1") },
230 { STRING_COMMA_LEN ("cygwin_premain2") },
231 { STRING_COMMA_LEN ("cygwin_premain3") },
232 /* Runtime pseudo-reloc. */
233 { STRING_COMMA_LEN ("_pei386_runtime_relocator") },
234 { STRING_COMMA_LEN ("do_pseudo_reloc") },
235 /* Global vars that should not be exported. */
236 { STRING_COMMA_LEN ("impure_ptr") },
237 { STRING_COMMA_LEN ("_impure_ptr") },
238 { STRING_COMMA_LEN ("_fmode") },
239 { STRING_COMMA_LEN ("environ") },
240 { STRING_COMMA_LEN ("__dso_handle") },
244 #define PE_ARCH_i386 1
246 #define PE_ARCH_mips 3
247 #define PE_ARCH_arm 4
248 #define PE_ARCH_arm_wince 5
250 /* Don't make it constant as underscore mode gets possibly overriden
251 by target or -(no-)leading-underscore option. */
252 static pe_details_type pe_detail_list
[] =
271 autofilter_symbollist_i386
281 autofilter_symbollist_i386
291 autofilter_symbollist_i386
297 16 /* R_SH_IMAGEBASE */,
301 autofilter_symbollist_generic
310 autofilter_symbollist_generic
319 autofilter_symbollist_generic
322 "pei-arm-wince-little",
323 "pe-arm-wince-little",
324 2, /* ARM_RVA32 on Windows CE, see bfd/coff-arm.c. */
328 autofilter_symbollist_generic
330 { NULL
, NULL
, 0, 0, 0, false, NULL
}
333 static const pe_details_type
*pe_details
;
335 /* Do not specify library suffix explicitly, to allow for dllized versions. */
336 static const autofilter_entry_type autofilter_liblist
[] =
338 { STRING_COMMA_LEN ("libcegcc") },
339 { STRING_COMMA_LEN ("libcygwin") },
340 { STRING_COMMA_LEN ("libgcc") },
341 { STRING_COMMA_LEN ("libgcc_s") },
342 { STRING_COMMA_LEN ("libstdc++") },
343 { STRING_COMMA_LEN ("libmingw32") },
344 { STRING_COMMA_LEN ("libmingwex") },
345 { STRING_COMMA_LEN ("libg2c") },
346 { STRING_COMMA_LEN ("libsupc++") },
347 { STRING_COMMA_LEN ("libobjc") },
348 { STRING_COMMA_LEN ("libgcj") },
349 { STRING_COMMA_LEN ("libmsvcrt") },
350 { STRING_COMMA_LEN ("libmsvcrt-os") },
351 { STRING_COMMA_LEN ("libucrt") },
352 { STRING_COMMA_LEN ("libucrtbase") },
356 /* Regardless of the suffix issue mentioned above, we must ensure that
357 we do not falsely match on a leading substring, such as when libtool
358 builds libstdc++ as a DLL using libsupc++convenience.a as an intermediate.
359 This routine ensures that the leading part of the name matches and that
360 it is followed by only an optional version suffix and a file extension,
361 returning zero if so or -1 if not. */
362 static int libnamencmp (const char *libname
, const autofilter_entry_type
*afptr
)
364 if (filename_ncmp (libname
, afptr
->name
, afptr
->len
))
367 libname
+= afptr
->len
;
369 /* Be liberal in interpreting what counts as a version suffix; we
370 accept anything that has a dash to separate it from the name and
371 begins with a digit. */
372 if (libname
[0] == '-')
374 if (!ISDIGIT (*++libname
))
376 /* Ensure the filename has an extension. */
377 while (*++libname
!= '.')
381 else if (libname
[0] != '.')
387 static const autofilter_entry_type autofilter_objlist
[] =
389 { STRING_COMMA_LEN ("crt0.o") },
390 { STRING_COMMA_LEN ("crt1.o") },
391 { STRING_COMMA_LEN ("crt2.o") },
392 { STRING_COMMA_LEN ("dllcrt1.o") },
393 { STRING_COMMA_LEN ("dllcrt2.o") },
394 { STRING_COMMA_LEN ("gcrt0.o") },
395 { STRING_COMMA_LEN ("gcrt1.o") },
396 { STRING_COMMA_LEN ("gcrt2.o") },
397 { STRING_COMMA_LEN ("crtbegin.o") },
398 { STRING_COMMA_LEN ("crtend.o") },
402 static const autofilter_entry_type autofilter_symbolprefixlist
[] =
404 /* _imp_ is treated specially, as it is always underscored. */
405 /* { STRING_COMMA_LEN ("_imp_") }, */
406 /* Don't export some c++ symbols. */
407 { STRING_COMMA_LEN ("__rtti_") },
408 { STRING_COMMA_LEN ("__builtin_") },
409 /* Don't re-export auto-imported symbols. */
410 { STRING_COMMA_LEN ("__nm_") },
411 /* Don't export symbols specifying internal DLL layout. */
412 { STRING_COMMA_LEN ("_head_") },
413 { STRING_COMMA_LEN ("_IMPORT_DESCRIPTOR_") },
414 /* Don't export section labels or artificial symbols
416 { STRING_COMMA_LEN (".") },
420 static const autofilter_entry_type autofilter_symbolsuffixlist
[] =
422 { STRING_COMMA_LEN ("_iname") },
423 { STRING_COMMA_LEN ("_NULL_THUNK_DATA") },
427 #define U(str) (pe_details->underscored ? "_" str : str)
430 pe_dll_id_target (const char *target
)
434 for (i
= 0; pe_detail_list
[i
].target_name
; i
++)
435 if (strcmp (pe_detail_list
[i
].target_name
, target
) == 0
436 || strcmp (pe_detail_list
[i
].object_target
, target
) == 0)
438 int u
= pe_leading_underscore
; /* Underscoring mode. -1 for use default. */
440 bfd_get_target_info (target
, NULL
, NULL
, &u
, NULL
);
443 pe_detail_list
[i
].underscored
= u
!= 0;
444 pe_details
= pe_detail_list
+ i
;
445 pe_leading_underscore
= (u
!= 0 ? 1 : 0);
448 einfo (_("%X%P: unsupported PEI architecture: %s\n"), target
);
452 /* Helper functions for qsort. Relocs must be sorted so that we can write
453 them out by pages. */
465 reloc_sort (const void *va
, const void *vb
)
467 const reloc_data_type
*a
= (const reloc_data_type
*) va
;
468 const reloc_data_type
*b
= (const reloc_data_type
*) vb
;
482 pe_export_sort (const void *va
, const void *vb
)
484 const def_file_export
*a
= va
;
485 const def_file_export
*b
= vb
;
493 return strcmp (an
, bn
);
496 /* Read and process the .DEF file. */
498 /* These correspond to the entries in pe_def_file->exports[]. I use
499 exported_symbol_sections[i] to tag whether or not the symbol was
500 defined, since we can't export symbols we don't have. */
502 static bfd_vma
*exported_symbol_offsets
;
503 static struct bfd_section
**exported_symbol_sections
;
504 static int export_table_size
;
505 static int count_exported
;
506 static int count_exported_byname
;
507 static int count_with_ordinals
;
508 static const char *dll_filename
;
509 static int min_ordinal
, max_ordinal
;
510 static int *exported_symbols
;
512 typedef struct exclude_list_struct
515 struct exclude_list_struct
*next
;
520 static struct exclude_list_struct
*excludes
= 0;
523 pe_dll_add_excludes (const char *new_excludes
, const exclude_type type
)
526 char *exclude_string
;
528 local_copy
= xstrdup (new_excludes
);
530 exclude_string
= strtok (local_copy
, ",:");
531 for (; exclude_string
; exclude_string
= strtok (NULL
, ",:"))
533 struct exclude_list_struct
*new_exclude
;
535 new_exclude
= xmalloc (sizeof (struct exclude_list_struct
));
536 new_exclude
->string
= xmalloc (strlen (exclude_string
) + 1);
537 strcpy (new_exclude
->string
, exclude_string
);
538 new_exclude
->type
= type
;
539 new_exclude
->next
= excludes
;
540 excludes
= new_exclude
;
547 is_import (const char* n
)
549 return (startswith (n
, "__imp_"));
552 /* abfd is a bfd containing n (or NULL)
553 It can be used for contextual checks. */
556 auto_export (bfd
*abfd
, def_file
*d
, const char *n
)
559 struct exclude_list_struct
*ex
;
560 const autofilter_entry_type
*afptr
;
561 const char * libname
= NULL
;
563 if (abfd
&& abfd
->my_archive
)
564 libname
= lbasename (bfd_get_filename (abfd
->my_archive
));
566 key
.name
= key
.its_name
= (char *) n
;
568 /* Return false if n is in the d->exports table. */
569 if (d
->num_exports
!= 0
570 && bsearch (&key
, d
->exports
, d
->num_exports
,
571 sizeof (pe_def_file
->exports
[0]), pe_export_sort
))
574 if (pe_dll_do_default_excludes
)
579 if (pe_dll_extra_pe_debug
)
580 printf ("considering exporting: %s, abfd=%p, abfd->my_arc=%p\n",
581 n
, abfd
, abfd
->my_archive
);
583 /* First of all, make context checks:
584 Don't export anything from standard libs. */
587 afptr
= autofilter_liblist
;
591 if (libnamencmp (libname
, afptr
) == 0 )
597 /* Next, exclude symbols from certain startup objects. */
599 if (abfd
&& (p
= lbasename (bfd_get_filename (abfd
))))
601 afptr
= autofilter_objlist
;
604 if (strcmp (p
, afptr
->name
) == 0)
610 /* Don't try to blindly exclude all symbols
611 that begin with '__'; this was tried and
612 it is too restrictive. Instead we have
613 a target specific list to use: */
614 afptr
= pe_details
->autofilter_symbollist
;
618 if (strcmp (n
, afptr
->name
) == 0)
624 /* Next, exclude symbols starting with ... */
625 afptr
= autofilter_symbolprefixlist
;
628 if (strncmp (n
, afptr
->name
, afptr
->len
) == 0)
634 /* Finally, exclude symbols ending with ... */
636 afptr
= autofilter_symbolsuffixlist
;
639 if ((len
>= afptr
->len
)
640 /* Add 1 to insure match with trailing '\0'. */
641 && strncmp (n
+ len
- afptr
->len
, afptr
->name
,
642 afptr
->len
+ 1) == 0)
649 for (ex
= excludes
; ex
; ex
= ex
->next
)
651 if (ex
->type
== EXCLUDELIBS
)
654 && ((filename_cmp (libname
, ex
->string
) == 0)
655 || (strcasecmp ("ALL", ex
->string
) == 0)))
658 else if (ex
->type
== EXCLUDEFORIMPLIB
)
660 if (filename_cmp (bfd_get_filename (abfd
), ex
->string
) == 0)
663 else if (strcmp (n
, ex
->string
) == 0)
671 process_def_file_and_drectve (bfd
*abfd ATTRIBUTE_UNUSED
, struct bfd_link_info
*info
)
674 struct bfd_link_hash_entry
*blhe
;
676 struct bfd_section
*s
;
677 def_file_export
*e
= 0;
681 pe_def_file
= def_file_empty ();
683 /* First, run around to all the objects looking for the .drectve
684 sections, and push those into the def file too. */
685 for (b
= info
->input_bfds
; b
; b
= b
->link
.next
)
687 s
= bfd_get_section_by_name (b
, ".drectve");
691 char *buf
= xmalloc (size
);
693 bfd_get_section_contents (b
, s
, buf
, 0, size
);
694 def_file_add_directive (pe_def_file
, buf
, size
);
699 /* Process aligned common symbol information from the
700 .drectve sections now; common symbol allocation is
701 done before final link, so it will be too late to
702 process them in process_embedded_commands() called
703 from _bfd_coff_link_input_bfd(). */
704 if (pe_def_file
->aligncomms
)
706 def_file_aligncomm
*ac
= pe_def_file
->aligncomms
;
709 struct coff_link_hash_entry
*sym_hash
;
710 sym_hash
= coff_link_hash_lookup (coff_hash_table (info
),
711 ac
->symbol_name
, false, false, false);
712 if (sym_hash
&& sym_hash
->root
.type
== bfd_link_hash_common
713 && sym_hash
->root
.u
.c
.p
->alignment_power
< (unsigned) ac
->alignment
)
715 sym_hash
->root
.u
.c
.p
->alignment_power
= (unsigned) ac
->alignment
;
721 /* If we are building an executable and there is nothing
722 to export, we do not build an export table at all. */
723 if (bfd_link_executable (info
) && pe_def_file
->num_exports
== 0
724 && (!pe_dll_export_everything
|| pe_dll_exclude_all_symbols
))
727 /* Now, maybe export everything else the default way. */
728 if ((pe_dll_export_everything
|| pe_def_file
->num_exports
== 0)
729 && !pe_dll_exclude_all_symbols
)
731 for (b
= info
->input_bfds
; b
; b
= b
->link
.next
)
736 if (!bfd_generic_link_read_symbols (b
))
738 einfo (_("%F%P: %pB: could not read symbols: %E\n"), b
);
742 symbols
= bfd_get_outsymbols (b
);
743 nsyms
= bfd_get_symcount (b
);
745 for (j
= 0; j
< nsyms
; j
++)
747 /* We should export symbols which are either global or not
748 anything at all. (.bss data is the latter)
749 We should not export undefined symbols. */
751 = (symbols
[j
]->section
!= bfd_und_section_ptr
752 && ((symbols
[j
]->flags
& BSF_GLOBAL
)
753 || (symbols
[j
]->flags
== 0)));
754 if (link_info
.version_info
&& would_export
)
756 = !bfd_hide_sym_by_version (link_info
.version_info
,
760 const char *sn
= symbols
[j
]->name
;
762 /* We should not re-export imported stuff. */
768 name
= xmalloc (strlen ("__imp_") + strlen (sn
) + 1);
769 sprintf (name
, "%s%s", "__imp_", sn
);
771 blhe
= bfd_link_hash_lookup (info
->hash
, name
,
772 false, false, false);
775 if (blhe
&& blhe
->type
== bfd_link_hash_defined
)
779 if (pe_details
->underscored
&& *sn
== '_')
782 if (auto_export (b
, pe_def_file
, sn
))
787 p
= def_file_add_export (pe_def_file
, sn
, 0, -1,
789 /* Fill data flag properly, from dlltool.c. */
791 p
->flag_data
= !(symbols
[j
]->flags
& BSF_FUNCTION
);
799 #define NE pe_def_file->num_exports
801 /* Don't create an empty export table. */
805 resort_needed
= false;
807 /* Canonicalize the export list. */
810 for (i
= 0; i
< NE
; i
++)
812 /* Check for fastcall/stdcall-decoration, but ignore
813 C++ mangled names. */
814 if (pe_def_file
->exports
[i
].name
[0] != '?'
815 && strchr (pe_def_file
->exports
[i
].name
, '@'))
817 /* This will preserve internal_name, which may have been
818 pointing to the same memory as name, or might not
820 int lead_at
= (*pe_def_file
->exports
[i
].name
== '@');
821 char *tmp
= xstrdup (pe_def_file
->exports
[i
].name
+ lead_at
);
822 char *tmp_at
= strrchr (tmp
, '@');
827 einfo (_("%X%P: cannot export %s: invalid export name\n"),
828 pe_def_file
->exports
[i
].name
);
829 pe_def_file
->exports
[i
].name
= tmp
;
830 resort_needed
= true;
835 /* Re-sort the exports table as we have possibly changed the order
836 by removing leading @. */
838 qsort (pe_def_file
->exports
, NE
, sizeof (pe_def_file
->exports
[0]),
841 if (pe_dll_stdcall_aliases
)
843 for (i
= 0; i
< NE
; i
++)
845 if (is_import (pe_def_file
->exports
[i
].name
))
848 if (strchr (pe_def_file
->exports
[i
].name
, '@'))
851 int lead_at
= (*pe_def_file
->exports
[i
].name
== '@');
852 char *tmp
= xstrdup (pe_def_file
->exports
[i
].name
+ lead_at
);
854 *(strchr (tmp
, '@')) = 0;
855 if (auto_export (NULL
, pe_def_file
, tmp
))
856 def_file_add_export (pe_def_file
, tmp
,
857 pe_def_file
->exports
[i
].internal_name
,
865 /* Convenience, but watch out for it changing. */
866 e
= pe_def_file
->exports
;
868 for (i
= 0, j
= 0; i
< NE
; i
++)
870 if (i
> 0 && strcmp (e
[i
].name
, e
[i
- 1].name
) == 0)
872 /* This is a duplicate. */
873 if (e
[j
- 1].ordinal
!= -1
874 && e
[i
].ordinal
!= -1
875 && e
[j
- 1].ordinal
!= e
[i
].ordinal
)
877 if (pe_dll_warn_dup_exports
)
878 /* xgettext:c-format */
879 einfo (_("%X%P: error, duplicate EXPORT with ordinals: %s (%d vs %d)\n"),
880 e
[j
- 1].name
, e
[j
- 1].ordinal
, e
[i
].ordinal
);
884 if (pe_dll_warn_dup_exports
)
885 /* xgettext:c-format */
886 einfo (_("%P: warning, duplicate EXPORT: %s\n"),
890 if (e
[i
].ordinal
!= -1)
891 e
[j
- 1].ordinal
= e
[i
].ordinal
;
892 e
[j
- 1].flag_private
|= e
[i
].flag_private
;
893 e
[j
- 1].flag_constant
|= e
[i
].flag_constant
;
894 e
[j
- 1].flag_noname
|= e
[i
].flag_noname
;
895 e
[j
- 1].flag_data
|= e
[i
].flag_data
;
897 free (e
[i
].internal_name
);
898 free (e
[i
].its_name
);
907 pe_def_file
->num_exports
= j
; /* == NE */
909 exported_symbol_offsets
= xmalloc (NE
* sizeof (bfd_vma
));
910 exported_symbol_sections
= xmalloc (NE
* sizeof (struct bfd_section
*));
912 memset (exported_symbol_sections
, 0, NE
* sizeof (struct bfd_section
*));
916 count_exported_byname
= 0;
917 count_with_ordinals
= 0;
919 for (i
= 0; i
< NE
; i
++)
921 char *int_name
= pe_def_file
->exports
[i
].internal_name
;
924 /* PR 19803: Make sure that any exported symbol does not get garbage collected. */
925 lang_add_gc_name (int_name
);
927 name
= xmalloc (strlen (int_name
) + 2);
928 if (pe_details
->underscored
&& int_name
[0] != '@')
931 strcpy (name
+ 1, int_name
);
933 /* PR 19803: The alias must be preserved as well. */
934 lang_add_gc_name (xstrdup (name
));
937 strcpy (name
, int_name
);
939 blhe
= bfd_link_hash_lookup (info
->hash
,
944 && (blhe
->type
== bfd_link_hash_defined
945 || (blhe
->type
== bfd_link_hash_common
)))
948 if (!pe_def_file
->exports
[i
].flag_noname
)
949 count_exported_byname
++;
951 /* Only fill in the sections. The actual offsets are computed
952 in fill_exported_offsets() after common symbols are laid
954 if (blhe
->type
== bfd_link_hash_defined
)
955 exported_symbol_sections
[i
] = blhe
->u
.def
.section
;
957 exported_symbol_sections
[i
] = blhe
->u
.c
.p
->section
;
959 if (pe_def_file
->exports
[i
].ordinal
!= -1)
961 if (max_ordinal
< pe_def_file
->exports
[i
].ordinal
)
962 max_ordinal
= pe_def_file
->exports
[i
].ordinal
;
963 if (min_ordinal
> pe_def_file
->exports
[i
].ordinal
)
964 min_ordinal
= pe_def_file
->exports
[i
].ordinal
;
965 count_with_ordinals
++;
968 /* Check for forward exports. These are indicated in DEF files by an
969 export directive of the form NAME1 = MODULE-NAME.EXTERNAL-NAME
970 but we must take care not to be fooled when the user wants to export
971 a symbol that actually really has a dot in it, so we only check
972 for them here, after real defined symbols have already been matched. */
973 else if (strchr (int_name
, '.'))
976 if (!pe_def_file
->exports
[i
].flag_noname
)
977 count_exported_byname
++;
979 pe_def_file
->exports
[i
].flag_forward
= 1;
981 if (pe_def_file
->exports
[i
].ordinal
!= -1)
983 if (max_ordinal
< pe_def_file
->exports
[i
].ordinal
)
984 max_ordinal
= pe_def_file
->exports
[i
].ordinal
;
985 if (min_ordinal
> pe_def_file
->exports
[i
].ordinal
)
986 min_ordinal
= pe_def_file
->exports
[i
].ordinal
;
987 count_with_ordinals
++;
990 else if (blhe
&& blhe
->type
== bfd_link_hash_undefined
)
992 /* xgettext:c-format */
993 einfo (_("%X%P: cannot export %s: symbol not defined\n"),
998 /* xgettext:c-format */
999 einfo (_("%X%P: cannot export %s: symbol wrong type (%d vs %d)\n"),
1001 blhe
->type
, bfd_link_hash_defined
);
1005 /* xgettext:c-format */
1006 einfo (_("%X%P: cannot export %s: symbol not found\n"),
1013 /* Build the bfd that will contain .edata and .reloc sections. */
1016 build_filler_bfd (int include_edata
)
1018 lang_input_statement_type
*filler_file
;
1019 filler_file
= lang_add_input_file ("dll stuff",
1020 lang_input_file_is_fake_enum
,
1022 filler_file
->the_bfd
= filler_bfd
= bfd_create ("dll stuff",
1023 link_info
.output_bfd
);
1024 if (filler_bfd
== NULL
1025 || !bfd_set_arch_mach (filler_bfd
,
1026 bfd_get_arch (link_info
.output_bfd
),
1027 bfd_get_mach (link_info
.output_bfd
)))
1029 einfo (_("%F%P: can not create BFD: %E\n"));
1035 edata_s
= bfd_make_section_old_way (filler_bfd
, ".edata");
1037 || !bfd_set_section_flags (edata_s
, (SEC_HAS_CONTENTS
1043 einfo (_("%X%P: can not create .edata section: %E\n"));
1046 bfd_set_section_size (edata_s
, edata_sz
);
1049 reloc_s
= bfd_make_section_old_way (filler_bfd
, ".reloc");
1051 || !bfd_set_section_flags (reloc_s
, (SEC_HAS_CONTENTS
1057 einfo (_("%X%P: can not create .reloc section: %E\n"));
1061 bfd_set_section_size (reloc_s
, 0);
1063 ldlang_add_file (filler_file
);
1066 /* Gather all the exported symbols and build the .edata section. */
1069 generate_edata (void)
1071 int i
, next_ordinal
;
1072 int name_table_size
= 0;
1074 /* First, we need to know how many exported symbols there are,
1075 and what the range of ordinals is. */
1076 if (count_with_ordinals
&& max_ordinal
> count_exported
)
1078 if (min_ordinal
> max_ordinal
- count_exported
+ 1)
1079 min_ordinal
= max_ordinal
- count_exported
+ 1;
1084 max_ordinal
= count_exported
;
1087 export_table_size
= max_ordinal
- min_ordinal
+ 1;
1088 exported_symbols
= xmalloc (export_table_size
* sizeof (int));
1089 for (i
= 0; i
< export_table_size
; i
++)
1090 exported_symbols
[i
] = -1;
1092 /* Now we need to assign ordinals to those that don't have them. */
1093 for (i
= 0; i
< NE
; i
++)
1095 if (exported_symbol_sections
[i
]
1096 || pe_def_file
->exports
[i
].flag_forward
)
1098 if (pe_def_file
->exports
[i
].ordinal
!= -1)
1100 int ei
= pe_def_file
->exports
[i
].ordinal
- min_ordinal
;
1101 int pi
= exported_symbols
[ei
];
1105 /* xgettext:c-format */
1106 einfo (_("%X%P: error: ordinal used twice: %d (%s vs %s)\n"),
1107 pe_def_file
->exports
[i
].ordinal
,
1108 pe_def_file
->exports
[i
].name
,
1109 pe_def_file
->exports
[pi
].name
);
1111 exported_symbols
[ei
] = i
;
1113 if (pe_def_file
->exports
[i
].its_name
)
1114 name_table_size
+= strlen (pe_def_file
->exports
[i
].its_name
) + 1;
1116 name_table_size
+= strlen (pe_def_file
->exports
[i
].name
) + 1;
1119 /* Reserve space for the forward name. */
1120 if (pe_def_file
->exports
[i
].flag_forward
)
1122 name_table_size
+= strlen (pe_def_file
->exports
[i
].internal_name
) + 1;
1126 next_ordinal
= min_ordinal
;
1127 for (i
= 0; i
< NE
; i
++)
1128 if ((exported_symbol_sections
[i
]
1129 || pe_def_file
->exports
[i
].flag_forward
)
1130 && pe_def_file
->exports
[i
].ordinal
== -1)
1132 while (exported_symbols
[next_ordinal
- min_ordinal
] != -1)
1135 exported_symbols
[next_ordinal
- min_ordinal
] = i
;
1136 pe_def_file
->exports
[i
].ordinal
= next_ordinal
;
1139 /* PR 12969: Check for more than 1^16 ordinals. */
1140 if (max_ordinal
> 65535 || next_ordinal
> 65535)
1141 /* xgettext:c-format */
1142 einfo(_("%X%P: error: export ordinal too large: %d\n"),
1143 max_ordinal
> next_ordinal
? max_ordinal
: next_ordinal
);
1145 /* OK, now we can allocate some memory. */
1146 edata_sz
= (40 /* directory */
1147 + 4 * export_table_size
/* addresses */
1148 + 4 * count_exported_byname
/* name ptrs */
1149 + 2 * count_exported_byname
/* ordinals */
1150 + name_table_size
+ strlen (dll_filename
) + 1);
1153 /* Fill the exported symbol offsets. The preliminary work has already
1154 been done in process_def_file_and_drectve(). */
1157 fill_exported_offsets (bfd
*abfd ATTRIBUTE_UNUSED
, struct bfd_link_info
*info
)
1160 struct bfd_link_hash_entry
*blhe
;
1162 for (i
= 0; i
< pe_def_file
->num_exports
; i
++)
1166 name
= xmalloc (strlen (pe_def_file
->exports
[i
].internal_name
) + 2);
1167 if (pe_details
->underscored
1168 && *pe_def_file
->exports
[i
].internal_name
!= '@')
1171 strcpy (name
+ 1, pe_def_file
->exports
[i
].internal_name
);
1174 strcpy (name
, pe_def_file
->exports
[i
].internal_name
);
1176 blhe
= bfd_link_hash_lookup (info
->hash
,
1178 false, false, true);
1180 if (blhe
&& blhe
->type
== bfd_link_hash_defined
)
1181 exported_symbol_offsets
[i
] = blhe
->u
.def
.value
;
1188 fill_edata (bfd
*abfd
, struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
1191 unsigned char *edirectory
;
1192 unsigned char *eaddresses
;
1193 unsigned char *enameptrs
;
1194 unsigned char *eordinals
;
1197 edata_d
= xmalloc (edata_sz
);
1199 /* Note use of array pointer math here. */
1200 edirectory
= edata_d
;
1201 eaddresses
= edirectory
+ 40;
1202 enameptrs
= eaddresses
+ 4 * export_table_size
;
1203 eordinals
= enameptrs
+ 4 * count_exported_byname
;
1204 enamestr
= (char *) eordinals
+ 2 * count_exported_byname
;
1206 #define ERVA(ptr) (((unsigned char *)(ptr) - edata_d) \
1207 + edata_s->output_section->vma - image_base)
1209 memset (edata_d
, 0, edata_sz
);
1211 if (pe_data (abfd
)->timestamp
== -1)
1212 H_PUT_32 (abfd
, time (0), edata_d
+ 4);
1214 H_PUT_32 (abfd
, pe_data (abfd
)->timestamp
, edata_d
+ 4);
1216 if (pe_def_file
->version_major
!= -1)
1218 bfd_put_16 (abfd
, pe_def_file
->version_major
, edata_d
+ 8);
1219 bfd_put_16 (abfd
, pe_def_file
->version_minor
, edata_d
+ 10);
1222 bfd_put_32 (abfd
, ERVA (enamestr
), edata_d
+ 12);
1223 strcpy (enamestr
, dll_filename
);
1224 enamestr
+= strlen (enamestr
) + 1;
1225 bfd_put_32 (abfd
, min_ordinal
, edata_d
+ 16);
1226 bfd_put_32 (abfd
, export_table_size
, edata_d
+ 20);
1227 bfd_put_32 (abfd
, count_exported_byname
, edata_d
+ 24);
1228 bfd_put_32 (abfd
, ERVA (eaddresses
), edata_d
+ 28);
1229 bfd_put_32 (abfd
, ERVA (enameptrs
), edata_d
+ 32);
1230 bfd_put_32 (abfd
, ERVA (eordinals
), edata_d
+ 36);
1232 fill_exported_offsets (abfd
, info
);
1234 /* Ok, now for the filling in part.
1235 Scan alphabetically - ie the ordering in the exports[] table,
1236 rather than by ordinal - the ordering in the exported_symbol[]
1237 table. See dlltool.c and:
1238 http://sources.redhat.com/ml/binutils/2003-04/msg00379.html
1239 for more information. */
1241 for (s
= 0; s
< NE
; s
++)
1243 struct bfd_section
*ssec
= exported_symbol_sections
[s
];
1244 if (pe_def_file
->exports
[s
].ordinal
!= -1
1245 && (pe_def_file
->exports
[s
].flag_forward
|| ssec
!= NULL
))
1247 int ord
= pe_def_file
->exports
[s
].ordinal
;
1249 if (pe_def_file
->exports
[s
].flag_forward
)
1251 bfd_put_32 (abfd
, ERVA (enamestr
),
1252 eaddresses
+ 4 * (ord
- min_ordinal
));
1254 strcpy (enamestr
, pe_def_file
->exports
[s
].internal_name
);
1255 enamestr
+= strlen (pe_def_file
->exports
[s
].internal_name
) + 1;
1259 bfd_vma srva
= (exported_symbol_offsets
[s
]
1260 + ssec
->output_section
->vma
1261 + ssec
->output_offset
);
1263 bfd_put_32 (abfd
, srva
- image_base
,
1264 eaddresses
+ 4 * (ord
- min_ordinal
));
1267 if (!pe_def_file
->exports
[s
].flag_noname
)
1269 char *ename
= pe_def_file
->exports
[s
].name
;
1270 if (pe_def_file
->exports
[s
].its_name
)
1271 ename
= pe_def_file
->exports
[s
].its_name
;
1273 bfd_put_32 (abfd
, ERVA (enamestr
), enameptrs
);
1275 strcpy (enamestr
, ename
);
1276 enamestr
+= strlen (enamestr
) + 1;
1277 bfd_put_16 (abfd
, ord
- min_ordinal
, eordinals
);
1279 pe_def_file
->exports
[s
].hint
= hint
++;
1286 static struct bfd_section
*current_sec
;
1289 pe_walk_relocs (struct bfd_link_info
*info
,
1291 const char *symname
,
1292 struct bfd_hash_table
*import_hash
,
1293 void (*cb
) (arelent
*, asection
*, char *, const char *))
1298 for (b
= info
->input_bfds
; b
; b
= b
->link
.next
)
1302 if (!bfd_generic_link_read_symbols (b
))
1304 einfo (_("%F%P: %pB: could not read symbols: %E\n"), b
);
1308 symbols
= bfd_get_outsymbols (b
);
1310 for (s
= b
->sections
; s
; s
= s
->next
)
1313 int relsize
, nrelocs
, i
;
1314 int flags
= bfd_section_flags (s
);
1316 /* Skip discarded linkonce sections. */
1317 if (flags
& SEC_LINK_ONCE
1318 && s
->output_section
== bfd_abs_section_ptr
)
1323 relsize
= bfd_get_reloc_upper_bound (b
, s
);
1324 relocs
= xmalloc (relsize
);
1325 nrelocs
= bfd_canonicalize_reloc (b
, s
, relocs
, symbols
);
1327 for (i
= 0; i
< nrelocs
; i
++)
1329 struct bfd_symbol
*sym
= *relocs
[i
]->sym_ptr_ptr
;
1331 /* Warning: the callback needs to be passed NAME directly. */
1334 if (bfd_hash_lookup (import_hash
, sym
->name
, false, false))
1336 strcpy (name
, sym
->name
);
1337 cb (relocs
[i
], s
, name
, symname
);
1342 if (strcmp (name
, sym
->name
) == 0)
1343 cb (relocs
[i
], s
, name
, symname
);
1349 /* Warning: the allocated symbols are remembered in BFD and reused
1350 later, so don't free them! */
1351 /* free (symbols); */
1357 pe_find_data_imports (const char *symhead
,
1358 void (*cb
) (arelent
*, asection
*, char *, const char *))
1360 struct bfd_link_hash_entry
*undef
;
1361 const size_t headlen
= strlen (symhead
);
1364 struct bfd_hash_table
*import_hash
;
1366 for (undef
= link_info
.hash
->undefs
; undef
; undef
= undef
->u
.undef
.next
)
1367 if (undef
->type
== bfd_link_hash_undefined
)
1369 size_t len
= strlen (undef
->root
.string
);
1376 /* For the pseudo-relocation support version 2, we can collect the symbols
1377 that are subject to auto-import and adjust the relocations en masse. */
1378 if (link_info
.pei386_runtime_pseudo_reloc
== 2)
1381 = (struct bfd_hash_table
*) xmalloc (sizeof (struct bfd_hash_table
));
1382 if (!bfd_hash_table_init (import_hash
,
1384 sizeof (struct bfd_hash_entry
)))
1385 einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
1390 /* We are being a bit cunning here. The buffer will have space for
1391 prefixes at the beginning. The prefix is modified here and in a
1392 number of functions called from this function. */
1393 #define PREFIX_LEN 32
1394 buf
= xmalloc (PREFIX_LEN
+ namelen
+ 1);
1395 name
= buf
+ PREFIX_LEN
;
1397 for (undef
= link_info
.hash
->undefs
; undef
; undef
= undef
->u
.undef
.next
)
1398 if (undef
->type
== bfd_link_hash_undefined
)
1400 struct bfd_link_hash_entry
*sym
;
1403 if (pe_dll_extra_pe_debug
)
1404 printf ("%s:%s\n", __FUNCTION__
, undef
->root
.string
);
1406 strcpy (name
, undef
->root
.string
);
1407 impname
= name
- (sizeof "__imp_" - 1);
1408 memcpy (impname
, "__imp_", sizeof "__imp_" - 1);
1410 sym
= bfd_link_hash_lookup (link_info
.hash
, impname
, 0, 0, 1);
1412 if (sym
&& sym
->type
== bfd_link_hash_defined
)
1415 bfd_hash_lookup (import_hash
, undef
->root
.string
, true, false);
1418 bfd
*b
= sym
->u
.def
.section
->owner
;
1419 const char *symname
= NULL
;
1423 if (!bfd_generic_link_read_symbols (b
))
1425 einfo (_("%F%P: %pB: could not read symbols: %E\n"), b
);
1429 symbols
= bfd_get_outsymbols (b
);
1430 nsyms
= bfd_get_symcount (b
);
1432 for (i
= 0; i
< nsyms
; i
++)
1433 if (strncmp (symbols
[i
]->name
, symhead
, headlen
) == 0)
1435 if (pe_dll_extra_pe_debug
)
1436 printf ("->%s\n", symbols
[i
]->name
);
1438 symname
= symbols
[i
]->name
+ headlen
;
1442 /* If the symobl isn't part of an import table, there is no
1443 point in building a fixup, this would give rise to link
1444 errors for mangled symbols instead of the original one. */
1446 pe_walk_relocs (&link_info
, name
, symname
, NULL
, cb
);
1451 /* Let's differentiate it somehow from defined. */
1452 undef
->type
= bfd_link_hash_defweak
;
1453 undef
->u
.def
.value
= sym
->u
.def
.value
;
1454 undef
->u
.def
.section
= sym
->u
.def
.section
;
1456 /* We replace the original name with the __imp_ prefixed one, this
1457 1) may trash memory 2) leads to duplicate symbols. But this is
1458 better than having a misleading name that can confuse GDB. */
1459 undef
->root
.string
= sym
->root
.string
;
1461 if (link_info
.pei386_auto_import
== -1)
1463 static bool warned
= false;
1465 info_msg (_("Info: resolving %s by linking to %s "
1466 "(auto-import)\n"), name
, impname
);
1468 /* PR linker/4844. */
1471 einfo (_("%P: warning: auto-importing has been activated "
1472 "without --enable-auto-import specified on the "
1473 "command line; this should work unless it "
1474 "involves constant data structures referencing "
1475 "symbols from auto-imported DLLs\n"));
1482 /* If we have the import hash table, walk the relocations only once. */
1485 pe_walk_relocs (&link_info
, name
, NULL
, import_hash
, cb
);
1486 bfd_hash_table_free (import_hash
);
1493 /* Gather all the relocations and build the .reloc section. */
1496 generate_reloc (bfd
*abfd
, struct bfd_link_info
*info
)
1498 /* For .reloc stuff. */
1499 reloc_data_type
*reloc_data
;
1500 int total_relocs
= 0;
1502 bfd_vma sec_page
= (bfd_vma
) -1;
1503 bfd_vma page_ptr
, page_count
;
1506 struct bfd_section
*s
;
1508 if (reloc_s
== NULL
|| reloc_s
->output_section
== bfd_abs_section_ptr
)
1511 for (b
= info
->input_bfds
; b
; b
= b
->link
.next
)
1512 for (s
= b
->sections
; s
; s
= s
->next
)
1513 total_relocs
+= s
->reloc_count
;
1515 reloc_data
= xmalloc (total_relocs
* sizeof (reloc_data_type
));
1519 for (bi
= 0, b
= info
->input_bfds
; b
; bi
++, b
= b
->link
.next
)
1522 int relsize
, nrelocs
;
1524 for (s
= b
->sections
; s
; s
= s
->next
)
1526 bfd_vma sec_vma
= s
->output_section
->vma
+ s
->output_offset
;
1529 /* If it's not loaded, we don't need to relocate it this way. */
1530 if (!(s
->output_section
->flags
& SEC_LOAD
))
1533 /* I don't know why there would be a reloc for these, but I've
1534 seen it happen - DJ */
1535 if (s
->output_section
== bfd_abs_section_ptr
)
1538 if (s
->output_section
->vma
== 0)
1540 /* Huh? Shouldn't happen, but punt if it does. */
1541 #if 0 /* This happens when linking with --just-symbols=<file>, so do not generate an error. */
1542 einfo (_("%P: zero vma section reloc detected: `%s' #%d f=%d\n"),
1543 s
->output_section
->name
, s
->output_section
->index
,
1544 s
->output_section
->flags
);
1549 if (!bfd_generic_link_read_symbols (b
))
1551 einfo (_("%F%P: %pB: could not read symbols: %E\n"), b
);
1555 symbols
= bfd_get_outsymbols (b
);
1556 relsize
= bfd_get_reloc_upper_bound (b
, s
);
1557 relocs
= xmalloc (relsize
);
1558 nrelocs
= bfd_canonicalize_reloc (b
, s
, relocs
, symbols
);
1560 for (i
= 0; i
< nrelocs
; i
++)
1562 if (pe_dll_extra_pe_debug
)
1564 struct bfd_symbol
*sym
= *relocs
[i
]->sym_ptr_ptr
;
1565 printf ("rel: %s\n", sym
->name
);
1567 if (!relocs
[i
]->howto
->pc_relative
1568 && relocs
[i
]->howto
->type
!= pe_details
->imagebase_reloc
)
1570 struct bfd_symbol
*sym
= *relocs
[i
]->sym_ptr_ptr
;
1571 const struct bfd_link_hash_entry
*blhe
1572 = bfd_wrapped_link_hash_lookup (abfd
, info
, sym
->name
,
1573 false, false, false);
1575 /* Don't create relocs for undefined weak symbols. */
1576 if (sym
->flags
== BSF_WEAK
)
1578 if (blhe
&& blhe
->type
== bfd_link_hash_undefweak
)
1580 /* Check aux sym and see if it is defined or not. */
1581 struct coff_link_hash_entry
*h
, *h2
;
1582 h
= (struct coff_link_hash_entry
*)blhe
;
1583 if (h
->symbol_class
!= C_NT_WEAK
|| h
->numaux
!= 1)
1585 h2
= h
->auxbfd
->tdata
.coff_obj_data
->sym_hashes
1586 [h
->aux
->x_sym
.x_tagndx
.l
];
1587 /* We don't want a base reloc if the aux sym is not
1588 found, undefined, or if it is the constant ABS
1589 zero default value. (We broaden that slightly by
1590 not testing the value, just the section; there's
1591 no reason we'd want a reference to any absolute
1592 address to get relocated during rebasing). */
1593 if (!h2
|| h2
->root
.type
== bfd_link_hash_undefined
1594 || h2
->root
.u
.def
.section
== bfd_abs_section_ptr
)
1597 else if (!blhe
|| blhe
->type
!= bfd_link_hash_defined
)
1600 /* Nor for Dwarf FDE references to discarded sections. */
1601 else if (bfd_is_abs_section (sym
->section
->output_section
))
1603 /* We only ignore relocs from .eh_frame sections, as
1604 they are discarded by the final link rather than
1605 resolved against the kept section. */
1606 if (!strcmp (s
->name
, ".eh_frame"))
1609 /* Nor for absolute symbols. */
1610 else if (blhe
&& ldexp_is_final_sym_absolute (blhe
)
1611 && (!blhe
->linker_def
1612 || (strcmp (sym
->name
, "__image_base__")
1613 && strcmp (sym
->name
, U ("__ImageBase")))))
1616 reloc_data
[total_relocs
].vma
= sec_vma
+ relocs
[i
]->address
;
1617 reloc_data
[total_relocs
].idx
= total_relocs
;
1619 /* Since we're only about to determine .reloc's size,
1620 subsequent output section VMA calculations will shift up
1621 sections at this or higher addresses. Relocations for
1622 such sections would hence end up not being correct. */
1623 if (reloc_data
[total_relocs
].vma
1624 >= reloc_s
->output_section
->vma
)
1625 einfo (_("%P: base relocation for section `%s' above "
1626 ".reloc section\n"), s
->output_section
->name
);
1628 #define BITS_AND_SHIFT(bits, shift) (bits * 1000 | shift)
1630 switch BITS_AND_SHIFT (relocs
[i
]->howto
->bitsize
,
1631 relocs
[i
]->howto
->rightshift
)
1633 #ifdef pe_use_x86_64
1634 case BITS_AND_SHIFT (64, 0):
1635 reloc_data
[total_relocs
].type
= IMAGE_REL_BASED_DIR64
;
1639 case BITS_AND_SHIFT (32, 0):
1640 reloc_data
[total_relocs
].type
= IMAGE_REL_BASED_HIGHLOW
;
1643 case BITS_AND_SHIFT (16, 0):
1644 reloc_data
[total_relocs
].type
= IMAGE_REL_BASED_LOW
;
1647 case BITS_AND_SHIFT (16, 16):
1648 reloc_data
[total_relocs
].type
= IMAGE_REL_BASED_HIGHADJ
;
1649 /* FIXME: we can't know the symbol's right value
1650 yet, but we probably can safely assume that
1651 CE will relocate us in 64k blocks, so leaving
1653 reloc_data
[total_relocs
].extra
= 0;
1656 case BITS_AND_SHIFT (26, 2):
1657 reloc_data
[total_relocs
].type
=
1658 IMAGE_REL_BASED_ARM_MOV32
;
1661 case BITS_AND_SHIFT (24, 2):
1662 /* FIXME: 0 is ARM_26D, it is defined in bfd/coff-arm.c
1663 Those ARM_xxx definitions should go in proper
1665 if (relocs
[i
]->howto
->type
== 0
1666 /* Older GNU linkers used 5 instead of 0 for this reloc. */
1667 || relocs
[i
]->howto
->type
== 5)
1668 /* This is an ARM_26D reloc, which is an ARM_26 reloc
1669 that has already been fully processed during a
1670 previous link stage, so ignore it here. */
1674 /* xgettext:c-format */
1675 einfo (_("%X%P: error: %d-bit reloc in dll\n"),
1676 relocs
[i
]->howto
->bitsize
);
1682 /* Warning: the allocated symbols are remembered in BFD and
1683 reused later, so don't free them! */
1687 /* At this point, we have total_relocs relocation addresses in
1688 reloc_addresses, which are all suitable for the .reloc section.
1689 We must now create the new sections. */
1690 qsort (reloc_data
, total_relocs
, sizeof (*reloc_data
), reloc_sort
);
1692 for (i
= 0; i
< total_relocs
; i
++)
1694 bfd_vma this_page
= (reloc_data
[i
].vma
>> 12);
1696 if (this_page
!= sec_page
)
1698 reloc_sz
= (reloc_sz
+ 3) & ~3; /* 4-byte align. */
1700 sec_page
= this_page
;
1705 if (reloc_data
[i
].type
== IMAGE_REL_BASED_HIGHADJ
)
1709 reloc_sz
= (reloc_sz
+ 3) & ~3; /* 4-byte align. */
1710 reloc_d
= xmalloc (reloc_sz
);
1711 sec_page
= (bfd_vma
) -1;
1713 page_ptr
= (bfd_vma
) -1;
1716 for (i
= 0; i
< total_relocs
; i
++)
1718 bfd_vma rva
= reloc_data
[i
].vma
- image_base
;
1719 bfd_vma this_page
= (rva
& ~0xfff);
1721 if (this_page
!= sec_page
)
1723 while (reloc_sz
& 3)
1724 reloc_d
[reloc_sz
++] = 0;
1726 if (page_ptr
!= (bfd_vma
) -1)
1727 bfd_put_32 (abfd
, reloc_sz
- page_ptr
, reloc_d
+ page_ptr
+ 4);
1729 bfd_put_32 (abfd
, this_page
, reloc_d
+ reloc_sz
);
1730 page_ptr
= reloc_sz
;
1732 sec_page
= this_page
;
1736 bfd_put_16 (abfd
, (rva
& 0xfff) + (reloc_data
[i
].type
<< 12),
1737 reloc_d
+ reloc_sz
);
1740 if (reloc_data
[i
].type
== IMAGE_REL_BASED_HIGHADJ
)
1742 bfd_put_16 (abfd
, reloc_data
[i
].extra
, reloc_d
+ reloc_sz
);
1749 while (reloc_sz
& 3)
1750 reloc_d
[reloc_sz
++] = 0;
1752 if (page_ptr
!= (bfd_vma
) -1)
1753 bfd_put_32 (abfd
, reloc_sz
- page_ptr
, reloc_d
+ page_ptr
+ 4);
1756 /* Given the exiting def_file structure, print out a .DEF file that
1757 corresponds to it. */
1760 quoteput (char *s
, FILE *f
, int needs_quotes
)
1764 for (cp
= s
; *cp
; cp
++)
1779 if (*s
== '"' || *s
== '\\')
1793 pe_dll_generate_def_file (const char *pe_out_def_filename
)
1796 FILE *out
= fopen (pe_out_def_filename
, "w");
1799 /* xgettext:c-format */
1800 einfo (_("%P: can't open output def file %s\n"),
1801 pe_out_def_filename
);
1805 if (pe_def_file
->name
)
1807 if (pe_def_file
->is_dll
)
1808 fprintf (out
, "LIBRARY ");
1810 fprintf (out
, "NAME ");
1812 quoteput (pe_def_file
->name
, out
, 1);
1814 if (pe_data (link_info
.output_bfd
)->pe_opthdr
.ImageBase
)
1816 fprintf (out
, " BASE=0x");
1817 fprintf_vma (out
, ((bfd_vma
) pe_data (link_info
.output_bfd
)->pe_opthdr
.ImageBase
));
1819 fprintf (out
, "\n");
1822 if (pe_def_file
->description
)
1824 fprintf (out
, "DESCRIPTION ");
1825 quoteput (pe_def_file
->description
, out
, 1);
1826 fprintf (out
, "\n");
1829 if (pe_def_file
->version_minor
!= -1)
1830 fprintf (out
, "VERSION %d.%d\n", pe_def_file
->version_major
,
1831 pe_def_file
->version_minor
);
1832 else if (pe_def_file
->version_major
!= -1)
1833 fprintf (out
, "VERSION %d\n", pe_def_file
->version_major
);
1835 if (pe_def_file
->stack_reserve
!= -1 || pe_def_file
->heap_reserve
!= -1)
1836 fprintf (out
, "\n");
1838 if (pe_def_file
->stack_commit
!= -1)
1839 fprintf (out
, "STACKSIZE 0x%x,0x%x\n",
1840 pe_def_file
->stack_reserve
, pe_def_file
->stack_commit
);
1841 else if (pe_def_file
->stack_reserve
!= -1)
1842 fprintf (out
, "STACKSIZE 0x%x\n", pe_def_file
->stack_reserve
);
1844 if (pe_def_file
->heap_commit
!= -1)
1845 fprintf (out
, "HEAPSIZE 0x%x,0x%x\n",
1846 pe_def_file
->heap_reserve
, pe_def_file
->heap_commit
);
1847 else if (pe_def_file
->heap_reserve
!= -1)
1848 fprintf (out
, "HEAPSIZE 0x%x\n", pe_def_file
->heap_reserve
);
1850 if (pe_def_file
->num_section_defs
> 0)
1852 fprintf (out
, "\nSECTIONS\n\n");
1854 for (i
= 0; i
< pe_def_file
->num_section_defs
; i
++)
1857 quoteput (pe_def_file
->section_defs
[i
].name
, out
, 0);
1859 if (pe_def_file
->section_defs
[i
].class)
1861 fprintf (out
, " CLASS ");
1862 quoteput (pe_def_file
->section_defs
[i
].class, out
, 0);
1865 if (pe_def_file
->section_defs
[i
].flag_read
)
1866 fprintf (out
, " READ");
1868 if (pe_def_file
->section_defs
[i
].flag_write
)
1869 fprintf (out
, " WRITE");
1871 if (pe_def_file
->section_defs
[i
].flag_execute
)
1872 fprintf (out
, " EXECUTE");
1874 if (pe_def_file
->section_defs
[i
].flag_shared
)
1875 fprintf (out
, " SHARED");
1877 fprintf (out
, "\n");
1881 if (pe_def_file
->num_exports
> 0)
1883 fprintf (out
, "EXPORTS\n");
1885 for (i
= 0; i
< pe_def_file
->num_exports
; i
++)
1887 def_file_export
*e
= pe_def_file
->exports
+ i
;
1889 quoteput (e
->name
, out
, 0);
1891 if (e
->internal_name
&& strcmp (e
->internal_name
, e
->name
))
1893 fprintf (out
, " = ");
1894 quoteput (e
->internal_name
, out
, 0);
1897 if (e
->ordinal
!= -1)
1898 fprintf (out
, " @%d", e
->ordinal
);
1900 if (e
->flag_private
)
1901 fprintf (out
, " PRIVATE");
1903 if (e
->flag_constant
)
1904 fprintf (out
, " CONSTANT");
1907 fprintf (out
, " NONAME");
1910 fprintf (out
, " DATA");
1912 fprintf (out
, "\n");
1916 if (pe_def_file
->num_imports
> 0)
1918 fprintf (out
, "\nIMPORTS\n\n");
1920 for (i
= 0; i
< pe_def_file
->num_imports
; i
++)
1922 def_file_import
*im
= pe_def_file
->imports
+ i
;
1925 if (im
->internal_name
1926 && (!im
->name
|| strcmp (im
->internal_name
, im
->name
)))
1928 quoteput (im
->internal_name
, out
, 0);
1929 fprintf (out
, " = ");
1932 quoteput (im
->module
->name
, out
, 0);
1936 quoteput (im
->name
, out
, 0);
1938 fprintf (out
, "%d", im
->ordinal
);
1942 fprintf (out
, " == ");
1943 quoteput (im
->its_name
, out
, 0);
1946 fprintf (out
, "\n");
1951 fprintf (out
, _("; no contents available\n"));
1953 if (fclose (out
) == EOF
)
1954 /* xgettext:c-format */
1955 einfo (_("%P: error closing file `%s'\n"), pe_out_def_filename
);
1958 /* Generate the import library. */
1960 static asymbol
**symtab
;
1963 static char *dll_symname
;
1965 #define UNDSEC bfd_und_section_ptr
1968 quick_section (bfd
*abfd
, const char *name
, int flags
, int align
)
1973 sec
= bfd_make_section_old_way (abfd
, name
);
1974 bfd_set_section_flags (sec
, flags
| SEC_ALLOC
| SEC_LOAD
| SEC_KEEP
);
1975 bfd_set_section_alignment (sec
, align
);
1976 /* Remember to undo this before trying to link internally! */
1977 sec
->output_section
= sec
;
1979 sym
= bfd_make_empty_symbol (abfd
);
1980 symtab
[symptr
++] = sym
;
1981 sym
->name
= sec
->name
;
1983 sym
->flags
= BSF_LOCAL
;
1990 quick_symbol (bfd
*abfd
,
1999 char *name
= xmalloc (strlen (n1
) + strlen (n2
) + strlen (n3
) + 1);
2004 sym
= bfd_make_empty_symbol (abfd
);
2009 symtab
[symptr
++] = sym
;
2012 static arelent
*reltab
= 0;
2013 static int relcount
= 0, relsize
= 0;
2016 quick_reloc (bfd
*abfd
, bfd_size_type address
, int which_howto
, int symidx
)
2018 if (relcount
>= relsize
- 1)
2022 reltab
= xrealloc (reltab
, relsize
* sizeof (arelent
));
2024 reltab
= xmalloc (relsize
* sizeof (arelent
));
2026 reltab
[relcount
].address
= address
;
2027 reltab
[relcount
].addend
= 0;
2028 reltab
[relcount
].howto
= bfd_reloc_type_lookup (abfd
, which_howto
);
2029 reltab
[relcount
].sym_ptr_ptr
= symtab
+ symidx
;
2034 save_relocs (asection
*sec
)
2038 sec
->relocation
= reltab
;
2039 sec
->reloc_count
= relcount
;
2040 sec
->orelocation
= xmalloc ((relcount
+ 1) * sizeof (arelent
*));
2041 for (i
= 0; i
< relcount
; i
++)
2042 sec
->orelocation
[i
] = sec
->relocation
+ i
;
2043 sec
->orelocation
[relcount
] = 0;
2044 sec
->flags
|= SEC_RELOC
;
2046 relcount
= relsize
= 0;
2049 /* .section .idata$2
2050 .global __head_my_dll
2067 make_head (bfd
*parent
)
2069 asection
*id2
, *id5
, *id4
;
2070 unsigned char *d2
, *d5
, *d4
;
2074 if (asprintf (&oname
, "%s_d%06d.o", dll_symname
, tmp_seq
) < 4)
2075 /* In theory we should return NULL here at let our caller decide what to
2076 do. But currently the return value is not checked, just used, and
2077 besides, this condition only happens when the system has run out of
2078 memory. So just give up. */
2079 exit (EXIT_FAILURE
);
2082 abfd
= bfd_create (oname
, parent
);
2083 bfd_find_target (pe_details
->object_target
, abfd
);
2084 bfd_make_writable (abfd
);
2086 bfd_set_format (abfd
, bfd_object
);
2087 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2090 symtab
= xmalloc (6 * sizeof (asymbol
*));
2091 id2
= quick_section (abfd
, ".idata$2", SEC_HAS_CONTENTS
, 2);
2092 id5
= quick_section (abfd
, ".idata$5", SEC_HAS_CONTENTS
, 2);
2093 id4
= quick_section (abfd
, ".idata$4", SEC_HAS_CONTENTS
, 2);
2094 quick_symbol (abfd
, U ("_head_"), dll_symname
, "", id2
, BSF_GLOBAL
, 0);
2095 quick_symbol (abfd
, U (""), dll_symname
, "_iname", UNDSEC
, BSF_GLOBAL
, 0);
2097 /* OK, pay attention here. I got confused myself looking back at
2098 it. We create a four-byte section to mark the beginning of the
2099 list, and we include an offset of 4 in the section, so that the
2100 pointer to the list points to the *end* of this section, which is
2101 the start of the list of sections from other objects. */
2103 bfd_set_section_size (id2
, 20);
2107 if (pe_use_nul_prefixed_import_tables
)
2108 d2
[0] = d2
[16] = PE_IDATA5_SIZE
; /* Reloc addend. */
2109 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 2);
2110 quick_reloc (abfd
, 12, BFD_RELOC_RVA
, 4);
2111 quick_reloc (abfd
, 16, BFD_RELOC_RVA
, 1);
2114 if (pe_use_nul_prefixed_import_tables
)
2115 bfd_set_section_size (id5
, PE_IDATA5_SIZE
);
2117 bfd_set_section_size (id5
, 0);
2118 d5
= xmalloc (PE_IDATA5_SIZE
);
2120 memset (d5
, 0, PE_IDATA5_SIZE
);
2121 if (pe_use_nul_prefixed_import_tables
)
2122 bfd_set_section_size (id4
, PE_IDATA4_SIZE
);
2124 bfd_set_section_size (id4
, 0);
2125 d4
= xmalloc (PE_IDATA4_SIZE
);
2127 memset (d4
, 0, PE_IDATA4_SIZE
);
2129 bfd_set_symtab (abfd
, symtab
, symptr
);
2131 bfd_set_section_contents (abfd
, id2
, d2
, 0, 20);
2132 if (pe_use_nul_prefixed_import_tables
)
2134 bfd_set_section_contents (abfd
, id5
, d5
, 0, PE_IDATA5_SIZE
);
2135 bfd_set_section_contents (abfd
, id4
, d4
, 0, PE_IDATA4_SIZE
);
2139 bfd_set_section_contents (abfd
, id5
, d5
, 0, 0);
2140 bfd_set_section_contents (abfd
, id4
, d4
, 0, 0);
2143 bfd_make_readable (abfd
);
2147 /* .section .idata$4
2154 .global __my_dll_iname
2159 make_tail (bfd
*parent
)
2161 asection
*id4
, *id5
, *id7
;
2162 unsigned char *d4
, *d5
, *d7
;
2167 if (asprintf (&oname
, "%s_d%06d.o", dll_symname
, tmp_seq
) < 4)
2168 /* In theory we should return NULL here at let our caller decide what to
2169 do. But currently the return value is not checked, just used, and
2170 besides, this condition only happens when the system has run out of
2171 memory. So just give up. */
2172 exit (EXIT_FAILURE
);
2175 abfd
= bfd_create (oname
, parent
);
2176 bfd_find_target (pe_details
->object_target
, abfd
);
2177 bfd_make_writable (abfd
);
2179 bfd_set_format (abfd
, bfd_object
);
2180 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2183 symtab
= xmalloc (5 * sizeof (asymbol
*));
2184 id4
= quick_section (abfd
, ".idata$4", SEC_HAS_CONTENTS
, 2);
2185 id5
= quick_section (abfd
, ".idata$5", SEC_HAS_CONTENTS
, 2);
2186 id7
= quick_section (abfd
, ".idata$7", SEC_HAS_CONTENTS
, 2);
2187 quick_symbol (abfd
, U (""), dll_symname
, "_iname", id7
, BSF_GLOBAL
, 0);
2189 bfd_set_section_size (id4
, PE_IDATA4_SIZE
);
2190 d4
= xmalloc (PE_IDATA4_SIZE
);
2192 memset (d4
, 0, PE_IDATA4_SIZE
);
2194 bfd_set_section_size (id5
, PE_IDATA5_SIZE
);
2195 d5
= xmalloc (PE_IDATA5_SIZE
);
2197 memset (d5
, 0, PE_IDATA5_SIZE
);
2199 len
= strlen (dll_filename
) + 1;
2202 bfd_set_section_size (id7
, len
);
2205 strcpy ((char *) d7
, dll_filename
);
2206 /* If len was odd, the above
2207 strcpy leaves behind an undefined byte. That is harmless,
2208 but we set it to 0 just so the binary dumps are pretty. */
2211 bfd_set_symtab (abfd
, symtab
, symptr
);
2213 bfd_set_section_contents (abfd
, id4
, d4
, 0, PE_IDATA4_SIZE
);
2214 bfd_set_section_contents (abfd
, id5
, d5
, 0, PE_IDATA5_SIZE
);
2215 bfd_set_section_contents (abfd
, id7
, d7
, 0, len
);
2217 bfd_make_readable (abfd
);
2223 .global ___imp_function
2224 .global __imp__function
2226 jmp *__imp__function:
2240 .asciz "function" xlate? (add underscore, kill at) */
2242 static const unsigned char jmp_ix86_bytes
[] =
2244 0xff, 0x25, 0x00, 0x00, 0x00, 0x00, 0x90, 0x90
2252 .dw __imp_function */
2254 static const unsigned char jmp_sh_bytes
[] =
2256 0x01, 0xd0, 0x02, 0x60, 0x2b, 0x40, 0x09, 0x00, 0x00, 0x00, 0x00, 0x00
2260 lui $t0,<high:__imp_function>
2261 lw $t0,<low:__imp_function>
2265 static const unsigned char jmp_mips_bytes
[] =
2267 0x00, 0x00, 0x08, 0x3c, 0x00, 0x00, 0x08, 0x8d,
2268 0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00
2271 static const unsigned char jmp_arm_bytes
[] =
2273 0x00, 0xc0, 0x9f, 0xe5, /* ldr ip, [pc] */
2274 0x00, 0xf0, 0x9c, 0xe5, /* ldr pc, [ip] */
2280 make_one (def_file_export
*exp
, bfd
*parent
, bool include_jmp_stub
)
2282 asection
*tx
, *id7
, *id5
, *id4
, *id6
;
2283 unsigned char *td
= NULL
, *d7
, *d5
, *d4
, *d6
= NULL
;
2287 const unsigned char *jmp_bytes
= NULL
;
2288 int jmp_byte_count
= 0;
2290 /* Include the jump stub section only if it is needed. A jump
2291 stub is needed if the symbol being imported <sym> is a function
2292 symbol and there is at least one undefined reference to that
2293 symbol. In other words, if all the import references to <sym> are
2294 explicitly through _declspec(dllimport) then the jump stub is not
2296 if (include_jmp_stub
)
2298 switch (pe_details
->pe_arch
)
2301 jmp_bytes
= jmp_ix86_bytes
;
2302 jmp_byte_count
= sizeof (jmp_ix86_bytes
);
2305 jmp_bytes
= jmp_sh_bytes
;
2306 jmp_byte_count
= sizeof (jmp_sh_bytes
);
2309 jmp_bytes
= jmp_mips_bytes
;
2310 jmp_byte_count
= sizeof (jmp_mips_bytes
);
2313 case PE_ARCH_arm_wince
:
2314 jmp_bytes
= jmp_arm_bytes
;
2315 jmp_byte_count
= sizeof (jmp_arm_bytes
);
2322 if (asprintf (&oname
, "%s_d%06d.o", dll_symname
, tmp_seq
) < 4)
2323 /* In theory we should return NULL here at let our caller decide what to
2324 do. But currently the return value is not checked, just used, and
2325 besides, this condition only happens when the system has run out of
2326 memory. So just give up. */
2327 exit (EXIT_FAILURE
);
2330 abfd
= bfd_create (oname
, parent
);
2331 bfd_find_target (pe_details
->object_target
, abfd
);
2332 bfd_make_writable (abfd
);
2334 bfd_set_format (abfd
, bfd_object
);
2335 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2338 symtab
= xmalloc (12 * sizeof (asymbol
*));
2340 tx
= quick_section (abfd
, ".text", SEC_CODE
| SEC_HAS_CONTENTS
| SEC_READONLY
, 2);
2341 id7
= quick_section (abfd
, ".idata$7", SEC_HAS_CONTENTS
, 2);
2342 id5
= quick_section (abfd
, ".idata$5", SEC_HAS_CONTENTS
, 2);
2343 id4
= quick_section (abfd
, ".idata$4", SEC_HAS_CONTENTS
, 2);
2344 id6
= quick_section (abfd
, ".idata$6", SEC_HAS_CONTENTS
, 2);
2346 if (*exp
->internal_name
== '@')
2348 quick_symbol (abfd
, U ("_head_"), dll_symname
, "", UNDSEC
,
2350 if (include_jmp_stub
)
2351 quick_symbol (abfd
, "", exp
->internal_name
, "", tx
, BSF_GLOBAL
, 0);
2352 quick_symbol (abfd
, "__imp_", exp
->internal_name
, "", id5
,
2354 /* Fastcall applies only to functions,
2355 so no need for auto-import symbol. */
2359 quick_symbol (abfd
, U ("_head_"), dll_symname
, "", UNDSEC
,
2361 if (include_jmp_stub
)
2362 quick_symbol (abfd
, U (""), exp
->internal_name
, "", tx
,
2364 quick_symbol (abfd
, "__imp_", U (""), exp
->internal_name
, id5
,
2366 /* Symbol to reference ord/name of imported
2367 data symbol, used to implement auto-import. */
2369 quick_symbol (abfd
, "__nm_", U (""), exp
->internal_name
, id6
,
2372 if (pe_dll_compat_implib
)
2373 quick_symbol (abfd
, "___imp_", exp
->internal_name
, "", id5
,
2376 if (include_jmp_stub
)
2378 bfd_set_section_size (tx
, jmp_byte_count
);
2379 td
= xmalloc (jmp_byte_count
);
2381 memcpy (td
, jmp_bytes
, jmp_byte_count
);
2383 switch (pe_details
->pe_arch
)
2386 #ifdef pe_use_x86_64
2387 quick_reloc (abfd
, 2, BFD_RELOC_32_PCREL
, 2);
2389 /* Mark this object as SAFESEH compatible. */
2390 quick_symbol (abfd
, "", "@feat.00", "", bfd_abs_section_ptr
,
2392 quick_reloc (abfd
, 2, BFD_RELOC_32
, 2);
2396 quick_reloc (abfd
, 8, BFD_RELOC_32
, 2);
2399 quick_reloc (abfd
, 0, BFD_RELOC_HI16_S
, 2);
2400 quick_reloc (abfd
, 0, BFD_RELOC_LO16
, 0); /* MIPS_R_PAIR */
2401 quick_reloc (abfd
, 4, BFD_RELOC_LO16
, 2);
2404 case PE_ARCH_arm_wince
:
2405 quick_reloc (abfd
, 8, BFD_RELOC_32
, 2);
2413 bfd_set_section_size (tx
, 0);
2415 bfd_set_section_size (id7
, 4);
2419 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 5);
2422 bfd_set_section_size (id5
, PE_IDATA5_SIZE
);
2423 d5
= xmalloc (PE_IDATA5_SIZE
);
2425 memset (d5
, 0, PE_IDATA5_SIZE
);
2427 if (exp
->flag_noname
)
2429 d5
[0] = exp
->ordinal
;
2430 d5
[1] = exp
->ordinal
>> 8;
2431 d5
[PE_IDATA5_SIZE
- 1] = 0x80;
2435 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 4);
2439 bfd_set_section_size (id4
, PE_IDATA4_SIZE
);
2440 d4
= xmalloc (PE_IDATA4_SIZE
);
2442 memset (d4
, 0, PE_IDATA4_SIZE
);
2444 if (exp
->flag_noname
)
2446 d4
[0] = exp
->ordinal
;
2447 d4
[1] = exp
->ordinal
>> 8;
2448 d4
[PE_IDATA4_SIZE
- 1] = 0x80;
2452 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 4);
2456 if (exp
->flag_noname
)
2459 bfd_set_section_size (id6
, 0);
2465 /* { short, asciz } */
2467 len
= 2 + strlen (exp
->its_name
) + 1;
2469 len
= 2 + strlen (exp
->name
) + 1;
2472 bfd_set_section_size (id6
, len
);
2475 memset (d6
, 0, len
);
2477 /* PR 20880: Use exp->hint as a backup, just in case exp->ordinal
2478 contains an invalid value (-1). */
2479 ord
= (exp
->ordinal
>= 0) ? exp
->ordinal
: exp
->hint
;
2484 strcpy ((char*) d6
+ 2, exp
->its_name
);
2486 strcpy ((char *) d6
+ 2, exp
->name
);
2489 bfd_set_symtab (abfd
, symtab
, symptr
);
2491 if (include_jmp_stub
)
2492 bfd_set_section_contents (abfd
, tx
, td
, 0, jmp_byte_count
);
2493 bfd_set_section_contents (abfd
, id7
, d7
, 0, 4);
2494 bfd_set_section_contents (abfd
, id5
, d5
, 0, PE_IDATA5_SIZE
);
2495 bfd_set_section_contents (abfd
, id4
, d4
, 0, PE_IDATA4_SIZE
);
2496 if (!exp
->flag_noname
)
2497 bfd_set_section_contents (abfd
, id6
, d6
, 0, len
);
2499 bfd_make_readable (abfd
);
2504 make_singleton_name_thunk (const char *import
, bfd
*parent
)
2506 /* Name thunks go to idata$4. */
2512 if (asprintf (&oname
, "%s_nmth%06d.o", dll_symname
, tmp_seq
) < 4)
2513 /* In theory we should return NULL here at let our caller decide what to
2514 do. But currently the return value is not checked, just used, and
2515 besides, this condition only happens when the system has run out of
2516 memory. So just give up. */
2517 exit (EXIT_FAILURE
);
2520 abfd
= bfd_create (oname
, parent
);
2521 bfd_find_target (pe_details
->object_target
, abfd
);
2522 bfd_make_writable (abfd
);
2524 bfd_set_format (abfd
, bfd_object
);
2525 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2528 symtab
= xmalloc (3 * sizeof (asymbol
*));
2529 id4
= quick_section (abfd
, ".idata$4", SEC_HAS_CONTENTS
, 2);
2530 quick_symbol (abfd
, "__nm_thnk_", import
, "", id4
, BSF_GLOBAL
, 0);
2531 quick_symbol (abfd
, "__nm_", import
, "", UNDSEC
, BSF_GLOBAL
, 0);
2533 /* We need space for the real thunk and for the null terminator. */
2534 bfd_set_section_size (id4
, PE_IDATA4_SIZE
* 2);
2535 d4
= xmalloc (PE_IDATA4_SIZE
* 2);
2537 memset (d4
, 0, PE_IDATA4_SIZE
* 2);
2538 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 2);
2541 bfd_set_symtab (abfd
, symtab
, symptr
);
2543 bfd_set_section_contents (abfd
, id4
, d4
, 0, PE_IDATA4_SIZE
* 2);
2545 bfd_make_readable (abfd
);
2550 make_import_fixup_mark (arelent
*rel
, char *name
)
2552 /* We convert reloc to symbol, for later reference. */
2553 static unsigned int counter
;
2554 struct bfd_symbol
*sym
= *rel
->sym_ptr_ptr
;
2555 bfd
*abfd
= bfd_asymbol_bfd (sym
);
2556 struct bfd_link_hash_entry
*bh
;
2557 char *fixup_name
, buf
[256];
2560 /* "name" buffer has space before the symbol name for prefixes. */
2561 sprintf (buf
, "__fu%d_", counter
++);
2562 prefix_len
= strlen (buf
);
2563 fixup_name
= name
- prefix_len
;
2564 memcpy (fixup_name
, buf
, prefix_len
);
2567 bfd_coff_link_add_one_symbol (&link_info
, abfd
, fixup_name
, BSF_GLOBAL
,
2568 current_sec
, /* sym->section, */
2569 rel
->address
, NULL
, true, false, &bh
);
2571 return bh
->root
.string
;
2574 /* .section .idata$2
2575 .rva __nm_thnk_SYM (singleton thunk with name of func)
2578 .rva __my_dll_iname (name of dll)
2579 .rva __fuNN_SYM (pointer to reference (address) in text) */
2582 make_import_fixup_entry (const char *name
,
2583 const char *fixup_name
,
2584 const char *symname
,
2592 if (asprintf (&oname
, "%s_fu%06d.o", dll_symname
, tmp_seq
) < 4)
2593 /* In theory we should return NULL here at let our caller decide what to
2594 do. But currently the return value is not checked, just used, and
2595 besides, this condition only happens when the system has run out of
2596 memory. So just give up. */
2597 exit (EXIT_FAILURE
);
2600 abfd
= bfd_create (oname
, parent
);
2601 bfd_find_target (pe_details
->object_target
, abfd
);
2602 bfd_make_writable (abfd
);
2604 bfd_set_format (abfd
, bfd_object
);
2605 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2608 symtab
= xmalloc (6 * sizeof (asymbol
*));
2609 id2
= quick_section (abfd
, ".idata$2", SEC_HAS_CONTENTS
, 2);
2611 quick_symbol (abfd
, "__nm_thnk_", name
, "", UNDSEC
, BSF_GLOBAL
, 0);
2612 quick_symbol (abfd
, U (""), symname
, "_iname", UNDSEC
, BSF_GLOBAL
, 0);
2613 quick_symbol (abfd
, "", fixup_name
, "", UNDSEC
, BSF_GLOBAL
, 0);
2615 bfd_set_section_size (id2
, 20);
2620 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 1);
2621 quick_reloc (abfd
, 12, BFD_RELOC_RVA
, 2);
2622 quick_reloc (abfd
, 16, BFD_RELOC_RVA
, 3);
2625 bfd_set_symtab (abfd
, symtab
, symptr
);
2627 bfd_set_section_contents (abfd
, id2
, d2
, 0, 20);
2629 bfd_make_readable (abfd
);
2633 /* .section .rdata_runtime_pseudo_reloc
2635 .rva __fuNN_SYM (pointer to reference (address) in text) */
2638 make_runtime_pseudo_reloc (const char *name ATTRIBUTE_UNUSED
,
2639 const char *fixup_name
,
2640 bfd_vma addend ATTRIBUTE_UNUSED
,
2645 unsigned char *rt_rel_d
;
2650 if (asprintf (&oname
, "%s_rtr%06d.o", dll_symname
, tmp_seq
) < 4)
2651 /* In theory we should return NULL here at let our caller decide what to
2652 do. But currently the return value is not checked, just used, and
2653 besides, this condition only happens when the system has run out of
2654 memory. So just give up. */
2655 exit (EXIT_FAILURE
);
2658 abfd
= bfd_create (oname
, parent
);
2659 bfd_find_target (pe_details
->object_target
, abfd
);
2660 bfd_make_writable (abfd
);
2662 bfd_set_format (abfd
, bfd_object
);
2663 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2665 if (link_info
.pei386_runtime_pseudo_reloc
== 2)
2667 if (runtime_pseudp_reloc_v2_init
)
2668 size
= 3 * sizeof (asymbol
*);
2670 size
= 6 * sizeof (asymbol
*);
2673 size
= 2 * sizeof (asymbol
*);
2676 symtab
= xmalloc (size
);
2679 = quick_section (abfd
, ".rdata_runtime_pseudo_reloc", SEC_HAS_CONTENTS
, 2);
2681 quick_symbol (abfd
, "", fixup_name
, "", UNDSEC
, BSF_GLOBAL
, 0);
2683 if (link_info
.pei386_runtime_pseudo_reloc
== 2)
2686 if (!runtime_pseudp_reloc_v2_init
)
2689 runtime_pseudp_reloc_v2_init
= true;
2692 quick_symbol (abfd
, "__imp_", name
, "", UNDSEC
, BSF_GLOBAL
, 0);
2694 bfd_set_section_size (rt_rel
, size
);
2695 rt_rel_d
= xmalloc (size
);
2696 rt_rel
->contents
= rt_rel_d
;
2697 memset (rt_rel_d
, 0, size
);
2698 quick_reloc (abfd
, size
- 8, BFD_RELOC_RVA
, 1);
2699 quick_reloc (abfd
, size
- 12, BFD_RELOC_RVA
, 2);
2700 bfd_put_32 (abfd
, bitsize
, rt_rel_d
+ (size
- 4));
2702 bfd_put_32 (abfd
, 1, rt_rel_d
+ 8);
2703 save_relocs (rt_rel
);
2705 bfd_set_symtab (abfd
, symtab
, symptr
);
2707 bfd_set_section_contents (abfd
, rt_rel
, rt_rel_d
, 0, size
);
2711 bfd_set_section_size (rt_rel
, 8);
2712 rt_rel_d
= xmalloc (8);
2713 rt_rel
->contents
= rt_rel_d
;
2714 memset (rt_rel_d
, 0, 8);
2716 bfd_put_32 (abfd
, addend
, rt_rel_d
);
2717 quick_reloc (abfd
, 4, BFD_RELOC_RVA
, 1);
2719 save_relocs (rt_rel
);
2721 bfd_set_symtab (abfd
, symtab
, symptr
);
2723 bfd_set_section_contents (abfd
, rt_rel
, rt_rel_d
, 0, 8);
2726 bfd_make_readable (abfd
);
2731 .rva __pei386_runtime_relocator */
2734 pe_create_runtime_relocator_reference (bfd
*parent
)
2736 asection
*extern_rt_rel
;
2737 unsigned char *extern_rt_rel_d
;
2741 if (asprintf (&oname
, "%s_ertr%06d.o", dll_symname
, tmp_seq
) < 4)
2742 /* In theory we should return NULL here at let our caller decide what to
2743 do. But currently the return value is not checked, just used, and
2744 besides, this condition only happens when the system has run out of
2745 memory. So just give up. */
2746 exit (EXIT_FAILURE
);
2749 abfd
= bfd_create (oname
, parent
);
2750 bfd_find_target (pe_details
->object_target
, abfd
);
2751 bfd_make_writable (abfd
);
2753 bfd_set_format (abfd
, bfd_object
);
2754 bfd_set_arch_mach (abfd
, pe_details
->bfd_arch
, 0);
2757 symtab
= xmalloc (2 * sizeof (asymbol
*));
2758 extern_rt_rel
= quick_section (abfd
, ".rdata", SEC_HAS_CONTENTS
, 2);
2760 quick_symbol (abfd
, "", U ("_pei386_runtime_relocator"), "", UNDSEC
,
2763 bfd_set_section_size (extern_rt_rel
, PE_IDATA5_SIZE
);
2764 extern_rt_rel_d
= xcalloc (1, PE_IDATA5_SIZE
);
2765 extern_rt_rel
->contents
= extern_rt_rel_d
;
2767 quick_reloc (abfd
, 0, BFD_RELOC_RVA
, 1);
2768 save_relocs (extern_rt_rel
);
2770 bfd_set_symtab (abfd
, symtab
, symptr
);
2772 bfd_set_section_contents (abfd
, extern_rt_rel
, extern_rt_rel_d
, 0, PE_IDATA5_SIZE
);
2774 bfd_make_readable (abfd
);
2779 pe_create_import_fixup (arelent
*rel
, asection
*s
, bfd_vma addend
, char *name
,
2780 const char *symname
)
2782 const char *fixup_name
= make_import_fixup_mark (rel
, name
);
2785 /* This is the original implementation of the auto-import feature, which
2786 primarily relied on the OS loader to patch things up with some help
2787 from the pseudo-relocator to overcome the main limitation. See the
2788 comment at the beginning of the file for an overview of the feature. */
2789 if (link_info
.pei386_runtime_pseudo_reloc
!= 2)
2791 struct bfd_link_hash_entry
*name_thunk_sym
;
2792 /* name buffer is allocated with space at beginning for prefixes. */
2793 char *thname
= name
- (sizeof "__nm_thnk_" - 1);
2794 memcpy (thname
, "__nm_thnk_", sizeof "__nm_thnk_" - 1);
2795 name_thunk_sym
= bfd_link_hash_lookup (link_info
.hash
, thname
, 0, 0, 1);
2797 if (!(name_thunk_sym
&& name_thunk_sym
->type
== bfd_link_hash_defined
))
2799 b
= make_singleton_name_thunk (name
, link_info
.output_bfd
);
2800 add_bfd_to_link (b
, bfd_get_filename (b
), &link_info
);
2802 /* If we ever use autoimport, we have to cast text section writable. */
2803 config
.text_read_only
= false;
2804 link_info
.output_bfd
->flags
&= ~WP_TEXT
;
2807 if (addend
== 0 || link_info
.pei386_runtime_pseudo_reloc
== 1)
2809 b
= make_import_fixup_entry (name
, fixup_name
, symname
,
2810 link_info
.output_bfd
);
2811 add_bfd_to_link (b
, bfd_get_filename (b
), &link_info
);
2815 /* In the original implementation, the pseudo-relocator was only used when
2816 the addend was not null. In the new implementation, the OS loader is
2817 completely bypassed and the pseudo-relocator does the entire work. */
2818 if ((addend
!= 0 && link_info
.pei386_runtime_pseudo_reloc
== 1)
2819 || link_info
.pei386_runtime_pseudo_reloc
== 2)
2821 if (pe_dll_extra_pe_debug
)
2822 printf ("creating runtime pseudo-reloc entry for %s (addend=%d)\n",
2823 fixup_name
, (int) addend
);
2825 b
= make_runtime_pseudo_reloc (name
, fixup_name
, addend
,
2826 rel
->howto
->bitsize
,
2827 link_info
.output_bfd
);
2828 add_bfd_to_link (b
, bfd_get_filename (b
), &link_info
);
2830 if (runtime_pseudo_relocs_created
++ == 0)
2832 b
= pe_create_runtime_relocator_reference (link_info
.output_bfd
);
2833 add_bfd_to_link (b
, bfd_get_filename (b
), &link_info
);
2837 else if (addend
!= 0)
2838 einfo (_("%X%P: %C: variable '%pT' can't be auto-imported; please read the documentation for ld's --enable-auto-import for details\n"),
2839 s
->owner
, s
, rel
->address
, (*rel
->sym_ptr_ptr
)->name
);
2843 pe_dll_generate_implib (def_file
*def
, const char *impfilename
, struct bfd_link_info
*info
)
2852 unlink_if_ordinary (impfilename
);
2854 outarch
= bfd_openw (impfilename
, 0);
2858 /* xgettext:c-format */
2859 einfo (_("%X%P: can't open .lib file: %s\n"), impfilename
);
2864 /* xgettext:c-format */
2865 info_msg (_("Creating library file: %s\n"), impfilename
);
2867 bfd_set_format (outarch
, bfd_archive
);
2868 outarch
->has_armap
= 1;
2870 /* Work out a reasonable size of things to put onto one line. */
2871 ar_head
= make_head (outarch
);
2873 /* Iterate the input BFDs, looking for exclude-modules-for-implib. */
2874 for (ibfd
= info
->input_bfds
; ibfd
; ibfd
= ibfd
->link
.next
)
2876 /* Iterate the exclude list. */
2877 struct exclude_list_struct
*ex
;
2879 for (ex
= excludes
, found
= 0; ex
&& !found
; ex
= ex
->next
)
2881 if (ex
->type
!= EXCLUDEFORIMPLIB
)
2883 found
= (filename_cmp (ex
->string
, bfd_get_filename (ibfd
)) == 0);
2885 /* If it matched, we must open a fresh BFD for it (the original
2886 input BFD is still needed for the DLL's final link) and add
2887 it into the archive member chain. */
2890 bfd
*newbfd
= bfd_openr (ibfd
->my_archive
2891 ? bfd_get_filename (ibfd
->my_archive
)
2892 : bfd_get_filename (ibfd
), NULL
);
2895 einfo (_("%X%P: bfd_openr %s: %E\n"), bfd_get_filename (ibfd
));
2898 if (ibfd
->my_archive
)
2900 /* Must now iterate through archive until we find the
2901 required member. A minor shame that we'll open the
2902 archive once per member that we require from it, and
2903 leak those archive bfds rather than reuse them. */
2904 bfd
*arbfd
= newbfd
;
2905 if (!bfd_check_format_matches (arbfd
, bfd_archive
, NULL
))
2907 einfo (_("%X%P: %s(%s): can't find member in non-archive file"),
2908 bfd_get_filename (ibfd
->my_archive
),
2909 bfd_get_filename (ibfd
));
2913 while ((newbfd
= bfd_openr_next_archived_file (arbfd
, newbfd
)) != 0)
2915 if (filename_cmp (bfd_get_filename (newbfd
),
2916 bfd_get_filename (ibfd
)) == 0)
2921 einfo (_("%X%P: %s(%s): can't find member in archive"),
2922 bfd_get_filename (ibfd
->my_archive
),
2923 bfd_get_filename (ibfd
));
2927 newbfd
->archive_next
= head
;
2932 for (i
= 0; i
< def
->num_exports
; i
++)
2934 /* The import library doesn't know about the internal name. */
2935 char *internal
= def
->exports
[i
].internal_name
;
2938 /* Don't add PRIVATE entries to import lib. */
2939 if (pe_def_file
->exports
[i
].flag_private
)
2942 def
->exports
[i
].internal_name
= def
->exports
[i
].name
;
2944 /* PR 19803: If a symbol has been discard due to garbage
2945 collection then do not create any exports for it. */
2947 struct coff_link_hash_entry
*h
;
2949 h
= coff_link_hash_lookup (coff_hash_table (info
), internal
,
2950 false, false, false);
2952 /* If the symbol is hidden and undefined then it
2953 has been swept up by garbage collection. */
2954 && h
->symbol_class
== C_HIDDEN
2955 && h
->root
.u
.def
.section
== bfd_und_section_ptr
)
2958 /* If necessary, check with an underscore prefix as well. */
2959 if (pe_details
->underscored
&& internal
[0] != '@')
2963 name
= xmalloc (strlen (internal
) + 2);
2964 sprintf (name
, "_%s", internal
);
2966 h
= coff_link_hash_lookup (coff_hash_table (info
), name
,
2967 false, false, false);
2971 /* If the symbol is hidden and undefined then it
2972 has been swept up by garbage collection. */
2973 && h
->symbol_class
== C_HIDDEN
2974 && h
->root
.u
.def
.section
== bfd_und_section_ptr
)
2979 n
= make_one (def
->exports
+ i
, outarch
, !(def
->exports
+ i
)->flag_data
);
2980 n
->archive_next
= head
;
2982 def
->exports
[i
].internal_name
= internal
;
2985 ar_tail
= make_tail (outarch
);
2987 if (ar_head
== NULL
|| ar_tail
== NULL
)
2990 /* Now stick them all into the archive. */
2991 ar_head
->archive_next
= head
;
2992 ar_tail
->archive_next
= ar_head
;
2995 if (! bfd_set_archive_head (outarch
, head
))
2996 einfo ("%X%P: bfd_set_archive_head: %E\n");
2998 if (! bfd_close (outarch
))
2999 einfo ("%X%P: bfd_close %s: %E\n", impfilename
);
3001 while (head
!= NULL
)
3003 bfd
*n
= head
->archive_next
;
3009 static int undef_count
= 0;
3017 static struct key_value
*udef_table
;
3019 static int undef_sort_cmp (const void *l1
, const void *r1
)
3021 const struct key_value
*l
= l1
;
3022 const struct key_value
*r
= r1
;
3024 return strcmp (l
->key
, r
->key
);
3027 static struct bfd_link_hash_entry
*
3028 pe_find_cdecl_alias_match (struct bfd_link_info
*linfo
, char *name
)
3030 struct bfd_link_hash_entry
*h
= NULL
;
3031 struct key_value
*kv
;
3032 struct key_value key
;
3033 char *at
, *lname
= xmalloc (strlen (name
) + 3);
3035 strcpy (lname
, name
);
3037 at
= strchr (lname
+ (lname
[0] == '@'), '@');
3042 kv
= bsearch (&key
, udef_table
, undef_count
, sizeof (struct key_value
),
3047 h
= bfd_link_hash_lookup (linfo
->hash
, kv
->oname
, false, false, false);
3048 if (h
->type
== bfd_link_hash_undefined
)
3052 if (lname
[0] == '?')
3055 if (at
|| lname
[0] == '@')
3057 if (lname
[0] == '@')
3059 if (pe_details
->underscored
)
3062 /* Use memmove rather than strcpy as that
3063 can handle overlapping buffers. */
3064 memmove (lname
, lname
+ 1, strlen (lname
));
3066 kv
= bsearch (&key
, udef_table
, undef_count
,
3067 sizeof (struct key_value
), undef_sort_cmp
);
3070 h
= bfd_link_hash_lookup (linfo
->hash
, kv
->oname
, false, false, false);
3071 if (h
->type
== bfd_link_hash_undefined
)
3076 *strchr (lname
, '@') = 0;
3078 kv
= bsearch (&key
, udef_table
, undef_count
,
3079 sizeof (struct key_value
), undef_sort_cmp
);
3082 h
= bfd_link_hash_lookup (linfo
->hash
, kv
->oname
, false, false, false);
3083 if (h
->type
== bfd_link_hash_undefined
)
3089 strcat (lname
, "@");
3091 kv
= bsearch (&key
, udef_table
, undef_count
,
3092 sizeof (struct key_value
), undef_sort_cmp
);
3096 h
= bfd_link_hash_lookup (linfo
->hash
, kv
->oname
, false, false, false);
3097 if (h
->type
== bfd_link_hash_undefined
)
3101 if (lname
[0] == '_' && pe_details
->underscored
)
3105 memmove (lname
+ 1, lname
, strlen (lname
) + 1);
3110 kv
= bsearch (&key
, udef_table
, undef_count
,
3111 sizeof (struct key_value
), undef_sort_cmp
);
3115 h
= bfd_link_hash_lookup (linfo
->hash
, kv
->oname
, false, false, false);
3116 if (h
->type
== bfd_link_hash_undefined
)
3128 pe_undef_count (struct bfd_link_hash_entry
*h ATTRIBUTE_UNUSED
,
3129 void *inf ATTRIBUTE_UNUSED
)
3131 if (h
->type
== bfd_link_hash_undefined
)
3137 pe_undef_fill (struct bfd_link_hash_entry
*h
, void *inf ATTRIBUTE_UNUSED
)
3139 if (h
->type
== bfd_link_hash_undefined
)
3143 udef_table
[undef_count
].key
= xstrdup (h
->root
.string
);
3144 at
= strchr (udef_table
[undef_count
].key
3145 + (udef_table
[undef_count
].key
[0] == '@'), '@');
3148 udef_table
[undef_count
].oname
= h
->root
.string
;
3155 pe_create_undef_table (void)
3159 /* count undefined symbols */
3161 bfd_link_hash_traverse (link_info
.hash
, pe_undef_count
, "");
3163 /* create and fill the corresponding table */
3164 udef_table
= xmalloc (undef_count
* sizeof (struct key_value
));
3167 bfd_link_hash_traverse (link_info
.hash
, pe_undef_fill
, "");
3170 qsort (udef_table
, undef_count
, sizeof (struct key_value
), undef_sort_cmp
);
3174 add_bfd_to_link (bfd
*abfd
, const char *name
, struct bfd_link_info
*linfo
)
3176 lang_input_statement_type
*fake_file
;
3178 fake_file
= lang_add_input_file (name
,
3179 lang_input_file_is_fake_enum
,
3181 fake_file
->the_bfd
= abfd
;
3182 ldlang_add_file (fake_file
);
3184 if (!bfd_link_add_symbols (abfd
, linfo
))
3185 einfo (_("%X%P: add symbols %s: %E\n"), name
);
3189 pe_process_import_defs (bfd
*output_bfd
, struct bfd_link_info
*linfo
)
3191 pe_dll_id_target (bfd_get_target (output_bfd
));
3196 def_file_module
*module
;
3197 def_file_import
*imp
;
3199 imp
= pe_def_file
->imports
;
3201 pe_create_undef_table ();
3203 for (module
= pe_def_file
->modules
; module
; module
= module
->next
)
3205 int do_this_dll
= 0;
3207 for (i
= 0; i
< pe_def_file
->num_imports
; i
++)
3208 if (imp
[i
].module
== module
)
3210 if (i
>= pe_def_file
->num_imports
)
3213 dll_filename
= module
->name
;
3214 dll_symname
= xstrdup (module
->name
);
3215 for (j
= 0; dll_symname
[j
]; j
++)
3216 if (!ISALNUM (dll_symname
[j
]))
3217 dll_symname
[j
] = '_';
3219 for (; i
< pe_def_file
->num_imports
&& imp
[i
].module
== module
; i
++)
3221 def_file_export exp
;
3222 struct bfd_link_hash_entry
*blhe
;
3223 int lead_at
= (*imp
[i
].internal_name
== '@');
3224 /* See if we need this import. */
3225 size_t len
= strlen (imp
[i
].internal_name
);
3226 char *name
= xmalloc (len
+ 2 + 6);
3227 bool include_jmp_stub
= false;
3228 bool is_cdecl
= false;
3229 bool is_undef
= false;
3231 if (!lead_at
&& strchr (imp
[i
].internal_name
, '@') == NULL
)
3235 sprintf (name
, "%s", imp
[i
].internal_name
);
3237 sprintf (name
, "%s%s",U (""), imp
[i
].internal_name
);
3239 blhe
= bfd_link_hash_lookup (linfo
->hash
, name
,
3240 false, false, false);
3242 /* Include the jump stub for <sym> only if the <sym>
3244 if (!blhe
|| (blhe
&& blhe
->type
!= bfd_link_hash_undefined
))
3247 sprintf (name
, "%s%s", "__imp_", imp
[i
].internal_name
);
3249 sprintf (name
, "%s%s%s", "__imp_", U (""),
3250 imp
[i
].internal_name
);
3252 blhe
= bfd_link_hash_lookup (linfo
->hash
, name
,
3253 false, false, false);
3255 is_undef
= (blhe
->type
== bfd_link_hash_undefined
);
3259 include_jmp_stub
= true;
3260 is_undef
= (blhe
->type
== bfd_link_hash_undefined
);
3264 && (!blhe
|| (blhe
&& blhe
->type
!= bfd_link_hash_undefined
)))
3266 sprintf (name
, "%s%s",U (""), imp
[i
].internal_name
);
3267 blhe
= pe_find_cdecl_alias_match (linfo
, name
);
3268 include_jmp_stub
= true;
3270 is_undef
= (blhe
->type
== bfd_link_hash_undefined
);
3281 bfd
*ar_head
= make_head (output_bfd
);
3282 add_bfd_to_link (ar_head
, bfd_get_filename (ar_head
),
3286 exp
.internal_name
= imp
[i
].internal_name
;
3287 exp
.name
= imp
[i
].name
;
3288 exp
.its_name
= imp
[i
].its_name
;
3289 exp
.ordinal
= imp
[i
].ordinal
;
3290 exp
.hint
= exp
.ordinal
>= 0 ? exp
.ordinal
: 0;
3291 exp
.flag_private
= 0;
3292 exp
.flag_constant
= 0;
3293 exp
.flag_data
= imp
[i
].data
;
3294 exp
.flag_noname
= exp
.name
? 0 : 1;
3295 one
= make_one (&exp
, output_bfd
,
3296 !exp
.flag_data
&& include_jmp_stub
);
3297 add_bfd_to_link (one
, bfd_get_filename (one
), linfo
);
3302 bfd
*ar_tail
= make_tail (output_bfd
);
3303 add_bfd_to_link (ar_tail
, bfd_get_filename (ar_tail
), linfo
);
3312 free (udef_table
[undef_count
].key
);
3317 if (pe_def_file
&& pe_def_file
->name
)
3318 dll_filename
= pe_def_file
->name
;
3321 dll_filename
= bfd_get_filename (output_bfd
);
3322 for (const char *p
= dll_filename
; *p
; p
++)
3323 if (*p
== '\\' || *p
== '/' || *p
== ':')
3324 dll_filename
= p
+ 1;
3326 dll_symname
= xstrdup (dll_filename
);
3327 for (int i
= 0; dll_symname
[i
]; i
++)
3328 if (!ISALNUM (dll_symname
[i
]))
3329 dll_symname
[i
] = '_';
3332 /* We were handed a *.DLL file. Parse it and turn it into a set of
3333 IMPORTS directives in the def file. Return TRUE if the file was
3334 handled, FALSE if not. */
3337 pe_get16 (bfd
*abfd
, int where
)
3341 bfd_seek (abfd
, (file_ptr
) where
, SEEK_SET
);
3342 bfd_bread (b
, (bfd_size_type
) 2, abfd
);
3343 return b
[0] + (b
[1] << 8);
3347 pe_get32 (bfd
*abfd
, int where
)
3351 bfd_seek (abfd
, (file_ptr
) where
, SEEK_SET
);
3352 bfd_bread (b
, (bfd_size_type
) 4, abfd
);
3353 return b
[0] + (b
[1] << 8) + (b
[2] << 16) + ((unsigned) b
[3] << 24);
3359 unsigned char *b
= ptr
;
3361 return b
[0] + (b
[1] << 8) + (b
[2] << 16) + ((unsigned) b
[3] << 24);
3365 pe_implied_import_dll (const char *filename
)
3368 bfd_vma pe_header_offset
, opthdr_ofs
, num_entries
, i
;
3369 bfd_vma export_rva
, export_size
, nsections
, secptr
, expptr
;
3370 bfd_vma exp_funcbase
;
3371 unsigned char *expdata
;
3373 bfd_vma name_rvas
, nexp
;
3374 const char *dllname
;
3375 /* Initialization with start > end guarantees that is_data
3376 will not be set by mistake, and avoids compiler warning. */
3377 bfd_vma data_start
= 1;
3378 bfd_vma data_end
= 0;
3379 bfd_vma rdata_start
= 1;
3380 bfd_vma rdata_end
= 0;
3381 bfd_vma bss_start
= 1;
3382 bfd_vma bss_end
= 0;
3385 /* No, I can't use bfd here. kernel32.dll puts its export table in
3386 the middle of the .rdata section. */
3387 dll
= bfd_openr (filename
, pe_details
->target_name
);
3390 einfo (_("%X%P: open %s: %E\n"), filename
);
3394 track_dependency_files (filename
);
3396 /* PEI dlls seem to be bfd_objects. */
3397 if (!bfd_check_format (dll
, bfd_object
))
3399 einfo (_("%X%P: %s: this doesn't appear to be a DLL\n"), filename
);
3403 /* Get pe_header, optional header and numbers of directory entries. */
3404 pe_header_offset
= pe_get32 (dll
, 0x3c);
3405 opthdr_ofs
= pe_header_offset
+ 4 + 20;
3406 #ifdef pe_use_x86_64
3407 num_entries
= pe_get32 (dll
, opthdr_ofs
+ 92 + 4 * 4); /* & NumberOfRvaAndSizes. */
3409 num_entries
= pe_get32 (dll
, opthdr_ofs
+ 92);
3412 /* No import or export directory entry. */
3413 if (num_entries
< 1)
3416 #ifdef pe_use_x86_64
3417 export_rva
= pe_get32 (dll
, opthdr_ofs
+ 96 + 4 * 4);
3418 export_size
= pe_get32 (dll
, opthdr_ofs
+ 100 + 4 * 4);
3420 export_rva
= pe_get32 (dll
, opthdr_ofs
+ 96);
3421 export_size
= pe_get32 (dll
, opthdr_ofs
+ 100);
3424 /* No export table - nothing to export. */
3425 if (export_size
== 0)
3428 nsections
= pe_get16 (dll
, pe_header_offset
+ 4 + 2);
3429 secptr
= (pe_header_offset
+ 4 + 20 +
3430 pe_get16 (dll
, pe_header_offset
+ 4 + 16));
3433 /* Get the rva and size of the export section. */
3434 for (i
= 0; i
< nsections
; i
++)
3437 bfd_vma secptr1
= secptr
+ 40 * i
;
3438 bfd_vma vaddr
= pe_get32 (dll
, secptr1
+ 12);
3439 bfd_vma vsize
= pe_get32 (dll
, secptr1
+ 16);
3440 bfd_vma fptr
= pe_get32 (dll
, secptr1
+ 20);
3442 bfd_seek (dll
, (file_ptr
) secptr1
, SEEK_SET
);
3443 bfd_bread (sname
, (bfd_size_type
) 8, dll
);
3445 if (vaddr
<= export_rva
&& vaddr
+ vsize
> export_rva
)
3447 expptr
= fptr
+ (export_rva
- vaddr
);
3448 if (export_rva
+ export_size
> vaddr
+ vsize
)
3449 export_size
= vsize
- (export_rva
- vaddr
);
3454 /* Scan sections and store the base and size of the
3455 data and bss segments in data/base_start/end. */
3456 for (i
= 0; i
< nsections
; i
++)
3458 bfd_vma secptr1
= secptr
+ 40 * i
;
3459 bfd_vma vsize
= pe_get32 (dll
, secptr1
+ 8);
3460 bfd_vma vaddr
= pe_get32 (dll
, secptr1
+ 12);
3461 bfd_vma flags
= pe_get32 (dll
, secptr1
+ 36);
3465 bfd_seek (dll
, (file_ptr
) secptr1
+ 0, SEEK_SET
);
3466 bfd_bread (sec_name
, (bfd_size_type
) 8, dll
);
3468 if (strcmp(sec_name
,".data") == 0)
3471 data_end
= vaddr
+ vsize
;
3473 if (pe_dll_extra_pe_debug
)
3474 printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n",
3475 __FUNCTION__
, sec_name
, (unsigned long) vaddr
,
3476 (unsigned long) (vaddr
+ vsize
), (unsigned long) flags
);
3478 else if (strcmp(sec_name
,".rdata") == 0)
3480 rdata_start
= vaddr
;
3481 rdata_end
= vaddr
+ vsize
;
3483 if (pe_dll_extra_pe_debug
)
3484 printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n",
3485 __FUNCTION__
, sec_name
, (unsigned long) vaddr
,
3486 (unsigned long) (vaddr
+ vsize
), (unsigned long) flags
);
3488 else if (strcmp (sec_name
,".bss") == 0)
3491 bss_end
= vaddr
+ vsize
;
3493 if (pe_dll_extra_pe_debug
)
3494 printf ("%s %s: 0x%08lx-0x%08lx (0x%08lx)\n",
3495 __FUNCTION__
, sec_name
, (unsigned long) vaddr
,
3496 (unsigned long) (vaddr
+ vsize
), (unsigned long) flags
);
3500 expdata
= xmalloc (export_size
);
3501 bfd_seek (dll
, (file_ptr
) expptr
, SEEK_SET
);
3502 bfd_bread (expdata
, (bfd_size_type
) export_size
, dll
);
3503 erva
= (char *) expdata
- export_rva
;
3505 if (pe_def_file
== 0)
3506 pe_def_file
= def_file_empty ();
3508 nexp
= pe_as32 (expdata
+ 24);
3509 name_rvas
= pe_as32 (expdata
+ 32);
3510 exp_funcbase
= pe_as32 (expdata
+ 28);
3512 /* Use internal dll name instead of filename
3513 to enable symbolic dll linking. */
3514 dllname
= erva
+ pe_as32 (expdata
+ 12);
3516 /* Check to see if the dll has already been added to
3517 the definition list and if so return without error.
3518 This avoids multiple symbol definitions. */
3519 if (def_get_module (pe_def_file
, dllname
))
3521 if (pe_dll_extra_pe_debug
)
3522 printf ("%s is already loaded\n", dllname
);
3526 /* This is an optimized version of the insertion loop, which avoids lots of
3527 calls to realloc and memmove from def_file_add_import. */
3528 if ((from
= def_file_add_import_from (pe_def_file
, nexp
,
3529 erva
+ pe_as32 (erva
+ name_rvas
),
3530 dllname
, 0, NULL
, NULL
)) >= 0)
3532 for (i
= 0; i
< nexp
; i
++)
3534 /* Pointer to the names vector. */
3535 bfd_vma name_rva
= pe_as32 (erva
+ name_rvas
+ i
* 4);
3536 def_file_import
*imp
;
3537 /* Pointer to the function address vector. */
3538 bfd_vma func_rva
= pe_as32 (erva
+ exp_funcbase
+ i
* 4);
3539 /* is_data is true if the address is in the data, rdata or bss
3542 (func_rva
>= data_start
&& func_rva
< data_end
)
3543 || (func_rva
>= rdata_start
&& func_rva
< rdata_end
)
3544 || (func_rva
>= bss_start
&& func_rva
< bss_end
);
3546 imp
= def_file_add_import_at (pe_def_file
, from
+ i
, erva
+ name_rva
,
3547 dllname
, i
, NULL
, NULL
);
3548 /* Mark symbol type. */
3549 imp
->data
= is_data
;
3551 if (pe_dll_extra_pe_debug
)
3552 printf ("%s dll-name: %s sym: %s addr: 0x%lx %s\n",
3553 __FUNCTION__
, dllname
, erva
+ name_rva
,
3554 (unsigned long) func_rva
, is_data
? "(data)" : "");
3560 /* Iterate through the list of symbols. */
3561 for (i
= 0; i
< nexp
; i
++)
3563 /* Pointer to the names vector. */
3564 bfd_vma name_rva
= pe_as32 (erva
+ name_rvas
+ i
* 4);
3565 def_file_import
*imp
;
3566 /* Pointer to the function address vector. */
3567 bfd_vma func_rva
= pe_as32 (erva
+ exp_funcbase
+ i
* 4);
3570 /* Skip unwanted symbols, which are
3571 exported in buggy auto-import releases. */
3572 if (! startswith (erva
+ name_rva
, "__nm_"))
3575 /* is_data is true if the address is in the data, rdata or bss
3578 (func_rva
>= data_start
&& func_rva
< data_end
)
3579 || (func_rva
>= rdata_start
&& func_rva
< rdata_end
)
3580 || (func_rva
>= bss_start
&& func_rva
< bss_end
);
3582 imp
= def_file_add_import (pe_def_file
, erva
+ name_rva
,
3583 dllname
, i
, NULL
, NULL
, &is_dup
);
3584 /* Mark symbol type. */
3586 imp
->data
= is_data
;
3588 if (pe_dll_extra_pe_debug
)
3589 printf ("%s dll-name: %s sym: %s addr: 0x%lx %s\n",
3590 __FUNCTION__
, dllname
, erva
+ name_rva
,
3591 (unsigned long) func_rva
, is_data
? "(data)" : "");
3599 pe_output_file_set_long_section_names (bfd
*abfd
)
3601 if (pe_use_coff_long_section_names
< 0)
3603 if (!bfd_coff_set_long_section_names (abfd
, pe_use_coff_long_section_names
))
3604 einfo (_("%X%P: error: can't use long section names on this arch\n"));
3607 /* These are the main functions, called from the emulation. The first
3608 is called after the bfds are read, so we can guess at how much space
3609 we need. The second is called after everything is placed, so we
3610 can put the right values in place. */
3613 pe_dll_build_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3615 pe_dll_id_target (bfd_get_target (abfd
));
3616 pe_output_file_set_long_section_names (abfd
);
3617 process_def_file_and_drectve (abfd
, info
);
3619 if (pe_def_file
->num_exports
== 0 && !bfd_link_pic (info
))
3621 if (pe_dll_enable_reloc_section
)
3623 build_filler_bfd (0);
3624 pe_output_file_set_long_section_names (filler_bfd
);
3630 build_filler_bfd (1);
3631 pe_output_file_set_long_section_names (filler_bfd
);
3635 pe_exe_build_sections (bfd
*abfd
, struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3637 pe_dll_id_target (bfd_get_target (abfd
));
3638 pe_output_file_set_long_section_names (abfd
);
3639 build_filler_bfd (0);
3640 pe_output_file_set_long_section_names (filler_bfd
);
3644 pe_dll_fill_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3646 pe_exe_fill_sections (abfd
, info
);
3650 fill_edata (abfd
, info
);
3651 edata_s
->contents
= edata_d
;
3654 if (bfd_link_dll (info
))
3655 pe_data (abfd
)->dll
= 1;
3659 pe_exe_fill_sections (bfd
*abfd
, struct bfd_link_info
*info
)
3661 pe_dll_id_target (bfd_get_target (abfd
));
3662 pe_output_file_set_long_section_names (abfd
);
3663 image_base
= pe_data (abfd
)->pe_opthdr
.ImageBase
;
3665 generate_reloc (abfd
, info
);
3668 bfd_set_section_size (reloc_s
, reloc_sz
);
3670 /* Resize the sections. */
3671 lang_reset_memory_regions ();
3672 lang_size_sections (NULL
, true);
3674 /* Redo special stuff. */
3675 ldemul_after_allocation ();
3677 /* Do the assignments again. */
3678 lang_do_assignments (lang_final_phase_enum
);
3681 reloc_s
->contents
= reloc_d
;
3685 pe_bfd_is_dll (bfd
*abfd
)
3687 return (bfd_get_format (abfd
) == bfd_object
3689 && pe_data (abfd
)->dll
);