1 /* Plugin support for BFD.
2 Copyright (C) 2009-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
24 #if BFD_SUPPORTS_PLUGINS
29 #elif defined (HAVE_WINDOWS_H)
32 #error Unknown how to handle dynamic-load-libraries.
35 #include "plugin-api.h"
38 #include "libiberty.h"
41 #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
43 #define RTLD_NOW 0 /* Dummy value. */
46 dlopen (const char *file
, int mode ATTRIBUTE_UNUSED
)
48 return LoadLibrary (file
);
52 dlsym (void *handle
, const char *name
)
54 return GetProcAddress (handle
, name
);
57 static int ATTRIBUTE_UNUSED
58 dlclose (void *handle
)
67 return "Unable to load DLL.";
70 #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
72 #define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup
73 #define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
74 #define bfd_plugin_new_section_hook _bfd_generic_new_section_hook
75 #define bfd_plugin_get_section_contents _bfd_generic_get_section_contents
76 #define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
77 #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
78 #define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
79 #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
80 #define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
81 #define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p
82 #define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
83 #define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
84 #define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno
85 #define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line
86 #define bfd_plugin_find_line _bfd_nosymbols_find_line
87 #define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
88 #define bfd_plugin_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string
89 #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
90 #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
91 #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
92 #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
93 #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
94 #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
95 #define bfd_plugin_bfd_relax_section bfd_generic_relax_section
96 #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
97 #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
98 #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
99 #define bfd_plugin_bfd_final_link _bfd_generic_final_link
100 #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
101 #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
102 #define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags
103 #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
104 #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
105 #define bfd_plugin_bfd_discard_group bfd_generic_discard_group
106 #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
107 #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
108 #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
110 static enum ld_plugin_status
111 message (int level ATTRIBUTE_UNUSED
,
112 const char * format
, ...)
115 va_start (args
, format
);
116 printf ("bfd plugin: ");
117 vprintf (format
, args
);
123 /* Register a claim-file handler. */
124 static ld_plugin_claim_file_handler claim_file
;
126 static enum ld_plugin_status
127 register_claim_file (ld_plugin_claim_file_handler handler
)
129 claim_file
= handler
;
133 static enum ld_plugin_status
134 add_symbols (void * handle
,
136 const struct ld_plugin_symbol
* syms
)
139 struct plugin_data_struct
*plugin_data
=
140 bfd_alloc (abfd
, sizeof (plugin_data_struct
));
142 plugin_data
->nsyms
= nsyms
;
143 plugin_data
->syms
= syms
;
146 abfd
->flags
|= HAS_SYMS
;
148 abfd
->tdata
.plugin_data
= plugin_data
;
152 static const char *plugin_program_name
;
155 bfd_plugin_set_program_name (const char *program_name
)
157 plugin_program_name
= program_name
;
161 try_claim (bfd
*abfd
)
164 struct ld_plugin_input_file file
;
167 file
.name
= abfd
->filename
;
169 if (abfd
->my_archive
)
171 iobfd
= abfd
->my_archive
;
172 file
.offset
= abfd
->origin
;
173 file
.filesize
= arelt_size (abfd
);
182 if (!iobfd
->iostream
&& !bfd_open_file (iobfd
))
185 file
.fd
= fileno ((FILE *) iobfd
->iostream
);
187 if (!abfd
->my_archive
)
189 struct stat stat_buf
;
190 if (fstat (file
.fd
, &stat_buf
))
192 file
.filesize
= stat_buf
.st_size
;
196 off_t cur_offset
= lseek(file
.fd
, 0, SEEK_CUR
);
197 claim_file (&file
, &claimed
);
198 lseek(file
.fd
, cur_offset
, SEEK_SET
);
206 try_load_plugin (const char *pname
, bfd
*abfd
, int *has_plugin_p
)
209 struct ld_plugin_tv tv
[4];
211 ld_plugin_onload onload
;
212 enum ld_plugin_status status
;
216 plugin_handle
= dlopen (pname
, RTLD_NOW
);
219 (*_bfd_error_handler
)("%s\n", dlerror ());
223 onload
= dlsym (plugin_handle
, "onload");
228 tv
[i
].tv_tag
= LDPT_MESSAGE
;
229 tv
[i
].tv_u
.tv_message
= message
;
232 tv
[i
].tv_tag
= LDPT_REGISTER_CLAIM_FILE_HOOK
;
233 tv
[i
].tv_u
.tv_register_claim_file
= register_claim_file
;
236 tv
[i
].tv_tag
= LDPT_ADD_SYMBOLS
;
237 tv
[i
].tv_u
.tv_add_symbols
= add_symbols
;
240 tv
[i
].tv_tag
= LDPT_NULL
;
241 tv
[i
].tv_u
.tv_val
= 0;
243 status
= (*onload
)(tv
);
245 if (status
!= LDPS_OK
)
250 abfd
->plugin_format
= bfd_plugin_no
;
255 if (!try_claim (abfd
))
258 abfd
->plugin_format
= bfd_plugin_yes
;
266 /* There may be plugin libraries in lib/bfd-plugins. */
268 static int has_plugin
= -1;
270 static const bfd_target
*(*ld_plugin_object_p
) (bfd
*);
272 static const char *plugin_name
;
275 bfd_plugin_set_plugin (const char *p
)
278 has_plugin
= p
!= NULL
;
281 /* Return TRUE if a plugin library is used. */
284 bfd_plugin_specified_p (void)
286 return has_plugin
> 0;
289 extern const bfd_target plugin_vec
;
291 /* Return TRUE if TARGET is a pointer to plugin_vec. */
294 bfd_plugin_target_p (const bfd_target
*target
)
296 return target
== &plugin_vec
;
299 /* Register OBJECT_P to be used by bfd_plugin_object_p. */
302 register_ld_plugin_object_p (const bfd_target
*(*object_p
) (bfd
*))
304 ld_plugin_object_p
= object_p
;
308 load_plugin (bfd
*abfd
)
320 return try_load_plugin (plugin_name
, abfd
, &has_plugin
);
322 if (plugin_program_name
== NULL
)
325 plugin_dir
= concat (BINDIR
, "/../lib/bfd-plugins", NULL
);
326 p
= make_relative_prefix (plugin_program_name
,
336 while ((ent
= readdir (d
)))
342 full_name
= concat (p
, "/", ent
->d_name
, NULL
);
343 if (stat(full_name
, &s
) == 0 && S_ISREG (s
.st_mode
))
344 found
= try_load_plugin (full_name
, abfd
, &valid_plugin
);
346 has_plugin
= valid_plugin
;
361 static const bfd_target
*
362 bfd_plugin_object_p (bfd
*abfd
)
364 if (ld_plugin_object_p
)
365 return ld_plugin_object_p (abfd
);
367 if (abfd
->plugin_format
== bfd_plugin_uknown
&& !load_plugin (abfd
))
370 return abfd
->plugin_format
== bfd_plugin_yes
? abfd
->xvec
: NULL
;
373 /* Copy any private info we understand from the input bfd
374 to the output bfd. */
377 bfd_plugin_bfd_copy_private_bfd_data (bfd
*ibfd ATTRIBUTE_UNUSED
,
378 bfd
*obfd ATTRIBUTE_UNUSED
)
384 /* Copy any private info we understand from the input section
385 to the output section. */
388 bfd_plugin_bfd_copy_private_section_data (bfd
*ibfd ATTRIBUTE_UNUSED
,
389 asection
*isection ATTRIBUTE_UNUSED
,
390 bfd
*obfd ATTRIBUTE_UNUSED
,
391 asection
*osection ATTRIBUTE_UNUSED
)
397 /* Copy any private info we understand from the input symbol
398 to the output symbol. */
401 bfd_plugin_bfd_copy_private_symbol_data (bfd
*ibfd ATTRIBUTE_UNUSED
,
402 asymbol
*isymbol ATTRIBUTE_UNUSED
,
403 bfd
*obfd ATTRIBUTE_UNUSED
,
404 asymbol
*osymbol ATTRIBUTE_UNUSED
)
411 bfd_plugin_bfd_print_private_bfd_data (bfd
*abfd ATTRIBUTE_UNUSED
, PTR ptr ATTRIBUTE_UNUSED
)
418 bfd_plugin_core_file_failing_command (bfd
*abfd ATTRIBUTE_UNUSED
)
425 bfd_plugin_core_file_failing_signal (bfd
*abfd ATTRIBUTE_UNUSED
)
432 bfd_plugin_core_file_pid (bfd
*abfd ATTRIBUTE_UNUSED
)
439 bfd_plugin_get_symtab_upper_bound (bfd
*abfd
)
441 struct plugin_data_struct
*plugin_data
= abfd
->tdata
.plugin_data
;
442 long nsyms
= plugin_data
->nsyms
;
444 BFD_ASSERT (nsyms
>= 0);
446 return ((nsyms
+ 1) * sizeof (asymbol
*));
450 convert_flags (const struct ld_plugin_symbol
*sym
)
461 return BSF_GLOBAL
| BSF_WEAK
;
470 bfd_plugin_canonicalize_symtab (bfd
*abfd
,
473 struct plugin_data_struct
*plugin_data
= abfd
->tdata
.plugin_data
;
474 long nsyms
= plugin_data
->nsyms
;
475 const struct ld_plugin_symbol
*syms
= plugin_data
->syms
;
476 static asection fake_section
;
477 static asection fake_common_section
;
480 fake_section
.name
= ".text";
481 fake_common_section
.flags
= SEC_IS_COMMON
;
483 for (i
= 0; i
< nsyms
; i
++)
485 asymbol
*s
= bfd_alloc (abfd
, sizeof (asymbol
));
491 s
->name
= syms
[i
].name
;
493 s
->flags
= convert_flags (&syms
[i
]);
497 s
->section
= &fake_common_section
;
501 s
->section
= bfd_und_section_ptr
;
505 s
->section
= &fake_section
;
511 s
->udata
.p
= (void *) &syms
[i
];
518 bfd_plugin_print_symbol (bfd
*abfd ATTRIBUTE_UNUSED
,
519 PTR afile ATTRIBUTE_UNUSED
,
520 asymbol
*symbol ATTRIBUTE_UNUSED
,
521 bfd_print_symbol_type how ATTRIBUTE_UNUSED
)
527 bfd_plugin_get_symbol_info (bfd
*abfd ATTRIBUTE_UNUSED
,
531 bfd_symbol_info (symbol
, ret
);
534 /* Make an empty symbol. */
537 bfd_plugin_make_empty_symbol (bfd
*abfd
)
539 asymbol
*new_symbol
= bfd_zalloc (abfd
, sizeof (asymbol
));
540 if (new_symbol
== NULL
)
542 new_symbol
->the_bfd
= abfd
;
547 bfd_plugin_sizeof_headers (bfd
*a ATTRIBUTE_UNUSED
,
548 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
554 const bfd_target plugin_vec
=
556 "plugin", /* Name. */
557 bfd_target_unknown_flavour
,
558 BFD_ENDIAN_LITTLE
, /* Target byte order. */
559 BFD_ENDIAN_LITTLE
, /* Target headers byte order. */
560 (HAS_RELOC
| EXEC_P
| /* Object flags. */
561 HAS_LINENO
| HAS_DEBUG
|
562 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
| D_PAGED
),
563 (SEC_CODE
| SEC_DATA
| SEC_ROM
| SEC_HAS_CONTENTS
564 | SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* Section flags. */
565 0, /* symbol_leading_char. */
566 '/', /* ar_pad_char. */
567 15, /* ar_max_namelen. */
568 255, /* match priority. */
570 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
571 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
572 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
573 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
574 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
575 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
577 { /* bfd_check_format. */
580 bfd_generic_archive_p
,
583 { /* bfd_set_format. */
586 _bfd_generic_mkarchive
,
589 { /* bfd_write_contents. */
592 _bfd_write_archive_contents
,
596 BFD_JUMP_TABLE_GENERIC (bfd_plugin
),
597 BFD_JUMP_TABLE_COPY (bfd_plugin
),
598 BFD_JUMP_TABLE_CORE (bfd_plugin
),
599 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff
),
600 BFD_JUMP_TABLE_SYMBOLS (bfd_plugin
),
601 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs
),
602 BFD_JUMP_TABLE_WRITE (bfd_plugin
),
603 BFD_JUMP_TABLE_LINK (bfd_plugin
),
604 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
608 NULL
/* backend_data. */
610 #endif /* BFD_SUPPORTS_PLUGIN */