1 /* Plugin support for BFD.
2 Copyright (C) 2009-2014 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_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
89 #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
90 #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
91 #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
92 #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
93 #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
94 #define bfd_plugin_bfd_relax_section bfd_generic_relax_section
95 #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
96 #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
97 #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
98 #define bfd_plugin_bfd_final_link _bfd_generic_final_link
99 #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
100 #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
101 #define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags
102 #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
103 #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
104 #define bfd_plugin_bfd_discard_group bfd_generic_discard_group
105 #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
106 #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
107 #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
109 static enum ld_plugin_status
110 message (int level ATTRIBUTE_UNUSED,
111 const char * format, ...)
114 va_start (args, format);
115 printf ("bfd plugin: ");
116 vprintf (format, args);
122 /* Register a claim-file handler. */
123 static ld_plugin_claim_file_handler claim_file;
125 static enum ld_plugin_status
126 register_claim_file (ld_plugin_claim_file_handler handler)
128 claim_file = handler;
132 static enum ld_plugin_status
133 add_symbols (void * handle,
135 const struct ld_plugin_symbol * syms)
138 struct plugin_data_struct *plugin_data =
139 bfd_alloc (abfd, sizeof (plugin_data_struct));
141 plugin_data->nsyms = nsyms;
142 plugin_data->syms = syms;
145 abfd->flags |= HAS_SYMS;
147 abfd->tdata.plugin_data = plugin_data;
151 static const char *plugin_program_name;
154 bfd_plugin_set_program_name (const char *program_name)
156 plugin_program_name = program_name;
160 try_claim (bfd *abfd)
163 struct ld_plugin_input_file file;
166 file.name = abfd->filename;
168 if (abfd->my_archive)
170 iobfd = abfd->my_archive;
171 file.offset = abfd->origin;
172 file.filesize = arelt_size (abfd);
181 if (!iobfd->iostream && !bfd_open_file (iobfd))
184 file.fd = fileno ((FILE *) iobfd->iostream);
186 if (!abfd->my_archive)
188 struct stat stat_buf;
189 if (fstat (file.fd, &stat_buf))
191 file.filesize = stat_buf.st_size;
195 off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
196 claim_file (&file, &claimed);
197 lseek(file.fd, cur_offset, SEEK_SET);
205 try_load_plugin (const char *pname, bfd *abfd)
209 struct ld_plugin_tv tv[tv_size];
211 ld_plugin_onload onload;
212 enum ld_plugin_status status;
214 plugin_handle = dlopen (pname, RTLD_NOW);
217 (*_bfd_error_handler)("%s\n", dlerror ());
221 onload = dlsym (plugin_handle, "onload");
226 tv[i].tv_tag = LDPT_MESSAGE;
227 tv[i].tv_u.tv_message = message;
230 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
231 tv[i].tv_u.tv_register_claim_file = register_claim_file;
234 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
235 tv[i].tv_u.tv_add_symbols = add_symbols;
238 tv[i].tv_tag = LDPT_NULL;
239 tv[i].tv_u.tv_val = 0;
241 status = (*onload)(tv);
243 if (status != LDPS_OK)
249 if (!try_claim (abfd))
255 plugin_handle = NULL;
259 static const char *plugin_name;
262 bfd_plugin_set_plugin (const char *p)
268 load_plugin (bfd *abfd)
277 return try_load_plugin (plugin_name, abfd);
279 if (plugin_program_name == NULL)
282 plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
283 p = make_relative_prefix (plugin_program_name,
293 while ((ent = readdir (d)))
298 full_name = concat (p, "/", ent->d_name, NULL);
299 if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
300 found = try_load_plugin (full_name, abfd);
315 static const bfd_target *
316 bfd_plugin_object_p (bfd *abfd)
318 if (!load_plugin (abfd))
324 /* Copy any private info we understand from the input bfd
325 to the output bfd. */
328 bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
329 bfd *obfd ATTRIBUTE_UNUSED)
335 /* Copy any private info we understand from the input section
336 to the output section. */
339 bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
340 asection *isection ATTRIBUTE_UNUSED,
341 bfd *obfd ATTRIBUTE_UNUSED,
342 asection *osection ATTRIBUTE_UNUSED)
348 /* Copy any private info we understand from the input symbol
349 to the output symbol. */
352 bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
353 asymbol *isymbol ATTRIBUTE_UNUSED,
354 bfd *obfd ATTRIBUTE_UNUSED,
355 asymbol *osymbol ATTRIBUTE_UNUSED)
362 bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
369 bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
376 bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
383 bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
390 bfd_plugin_get_symtab_upper_bound (bfd *abfd)
392 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
393 long nsyms = plugin_data->nsyms;
395 BFD_ASSERT (nsyms >= 0);
397 return ((nsyms + 1) * sizeof (asymbol *));
401 convert_flags (const struct ld_plugin_symbol *sym)
412 return BSF_GLOBAL | BSF_WEAK;
421 bfd_plugin_canonicalize_symtab (bfd *abfd,
424 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
425 long nsyms = plugin_data->nsyms;
426 const struct ld_plugin_symbol *syms = plugin_data->syms;
427 static asection fake_section;
428 static asection fake_common_section;
431 fake_section.name = ".text";
432 fake_common_section.flags = SEC_IS_COMMON;
434 for (i = 0; i < nsyms; i++)
436 asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
442 s->name = syms[i].name;
444 s->flags = convert_flags (&syms[i]);
448 s->section = &fake_common_section;
452 s->section = bfd_und_section_ptr;
456 s->section = &fake_section;
462 s->udata.p = (void *) &syms[i];
469 bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
470 PTR afile ATTRIBUTE_UNUSED,
471 asymbol *symbol ATTRIBUTE_UNUSED,
472 bfd_print_symbol_type how ATTRIBUTE_UNUSED)
478 bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
482 bfd_symbol_info (symbol, ret);
485 /* Make an empty symbol. */
488 bfd_plugin_make_empty_symbol (bfd *abfd)
490 asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
491 if (new_symbol == NULL)
493 new_symbol->the_bfd = abfd;
498 bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
499 struct bfd_link_info *info ATTRIBUTE_UNUSED)
505 const bfd_target plugin_vec =
507 "plugin", /* Name. */
508 bfd_target_unknown_flavour,
509 BFD_ENDIAN_LITTLE, /* Target byte order. */
510 BFD_ENDIAN_LITTLE, /* Target headers byte order. */
511 (HAS_RELOC | EXEC_P | /* Object flags. */
512 HAS_LINENO | HAS_DEBUG |
513 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
514 (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
515 | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */
516 0, /* symbol_leading_char. */
517 '/', /* ar_pad_char. */
518 15, /* ar_max_namelen. */
519 0, /* match priority. */
521 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
522 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
523 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
524 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
525 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
526 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
528 { /* bfd_check_format. */
531 bfd_generic_archive_p,
534 { /* bfd_set_format. */
537 _bfd_generic_mkarchive,
540 { /* bfd_write_contents. */
543 _bfd_write_archive_contents,
547 BFD_JUMP_TABLE_GENERIC (bfd_plugin),
548 BFD_JUMP_TABLE_COPY (bfd_plugin),
549 BFD_JUMP_TABLE_CORE (bfd_plugin),
550 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
551 BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
552 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
553 BFD_JUMP_TABLE_WRITE (bfd_plugin),
554 BFD_JUMP_TABLE_LINK (bfd_plugin),
555 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
559 NULL /* backend_data. */
561 #endif /* BFD_SUPPORTS_PLUGIN */