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_inliner_info _bfd_nosymbols_find_inliner_info
87 #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
88 #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
89 #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
90 #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
91 #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
92 #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
93 #define bfd_plugin_bfd_relax_section bfd_generic_relax_section
94 #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
95 #define bfd_plugin_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
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_load_plugin (const char *pname)
162 static void *plugin_handle;
164 struct ld_plugin_tv tv[tv_size];
166 ld_plugin_onload onload;
167 enum ld_plugin_status status;
169 plugin_handle = dlopen (pname, RTLD_NOW);
172 (*_bfd_error_handler)("%s\n", dlerror ());
176 onload = dlsym (plugin_handle, "onload");
181 tv[i].tv_tag = LDPT_MESSAGE;
182 tv[i].tv_u.tv_message = message;
185 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
186 tv[i].tv_u.tv_register_claim_file = register_claim_file;
189 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
190 tv[i].tv_u.tv_add_symbols = add_symbols;
193 tv[i].tv_tag = LDPT_NULL;
194 tv[i].tv_u.tv_val = 0;
196 status = (*onload)(tv);
198 if (status != LDPS_OK)
207 plugin_handle = NULL;
211 static const char *plugin_name;
214 bfd_plugin_set_plugin (const char *p)
229 return try_load_plugin (plugin_name);
231 if (plugin_program_name == NULL)
234 plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
235 p = make_relative_prefix (plugin_program_name,
245 while ((ent = readdir (d)))
250 full_name = concat (p, "/", ent->d_name, NULL);
251 if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
252 found = try_load_plugin (full_name);
267 static const bfd_target *
268 bfd_plugin_object_p (bfd *abfd)
271 struct ld_plugin_input_file file;
273 static int have_loaded = 0;
274 static int have_plugin = 0;
279 have_plugin = load_plugin ();
284 file.name = abfd->filename;
286 if (abfd->my_archive)
288 iobfd = abfd->my_archive;
289 file.offset = abfd->origin;
290 file.filesize = arelt_size (abfd);
299 if (!iobfd->iostream && !bfd_open_file (iobfd))
302 file.fd = fileno ((FILE *) iobfd->iostream);
304 if (!abfd->my_archive)
306 struct stat stat_buf;
307 if (fstat (file.fd, &stat_buf))
309 file.filesize = stat_buf.st_size;
313 off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
314 claim_file (&file, &claimed);
315 lseek(file.fd, cur_offset, SEEK_SET);
322 /* Copy any private info we understand from the input bfd
323 to the output bfd. */
326 bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
327 bfd *obfd ATTRIBUTE_UNUSED)
333 /* Copy any private info we understand from the input section
334 to the output section. */
337 bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
338 asection *isection ATTRIBUTE_UNUSED,
339 bfd *obfd ATTRIBUTE_UNUSED,
340 asection *osection ATTRIBUTE_UNUSED)
346 /* Copy any private info we understand from the input symbol
347 to the output symbol. */
350 bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
351 asymbol *isymbol ATTRIBUTE_UNUSED,
352 bfd *obfd ATTRIBUTE_UNUSED,
353 asymbol *osymbol ATTRIBUTE_UNUSED)
360 bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
367 bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
374 bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
381 bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
388 bfd_plugin_get_symtab_upper_bound (bfd *abfd)
390 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
391 long nsyms = plugin_data->nsyms;
393 BFD_ASSERT (nsyms >= 0);
395 return ((nsyms + 1) * sizeof (asymbol *));
399 convert_flags (const struct ld_plugin_symbol *sym)
410 return BSF_GLOBAL | BSF_WEAK;
419 bfd_plugin_canonicalize_symtab (bfd *abfd,
422 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
423 long nsyms = plugin_data->nsyms;
424 const struct ld_plugin_symbol *syms = plugin_data->syms;
425 static asection fake_section;
426 static asection fake_common_section;
429 fake_section.name = ".text";
430 fake_common_section.flags = SEC_IS_COMMON;
432 for (i = 0; i < nsyms; i++)
434 asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
440 s->name = syms[i].name;
442 s->flags = convert_flags (&syms[i]);
446 s->section = &fake_common_section;
450 s->section = bfd_und_section_ptr;
454 s->section = &fake_section;
460 s->udata.p = (void *) &syms[i];
467 bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
468 PTR afile ATTRIBUTE_UNUSED,
469 asymbol *symbol ATTRIBUTE_UNUSED,
470 bfd_print_symbol_type how ATTRIBUTE_UNUSED)
476 bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
480 bfd_symbol_info (symbol, ret);
483 /* Make an empty symbol. */
486 bfd_plugin_make_empty_symbol (bfd *abfd)
488 asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
489 if (new_symbol == NULL)
491 new_symbol->the_bfd = abfd;
496 bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
497 struct bfd_link_info *info ATTRIBUTE_UNUSED)
503 const bfd_target plugin_vec =
505 "plugin", /* Name. */
506 bfd_target_unknown_flavour,
507 BFD_ENDIAN_LITTLE, /* Target byte order. */
508 BFD_ENDIAN_LITTLE, /* Target headers byte order. */
509 (HAS_RELOC | EXEC_P | /* Object flags. */
510 HAS_LINENO | HAS_DEBUG |
511 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
512 (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
513 | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */
514 0, /* symbol_leading_char. */
515 '/', /* ar_pad_char. */
516 15, /* ar_max_namelen. */
517 0, /* match priority. */
519 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
520 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
521 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
522 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
523 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
524 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
526 { /* bfd_check_format. */
529 bfd_generic_archive_p,
532 { /* bfd_set_format. */
535 _bfd_generic_mkarchive,
538 { /* bfd_write_contents. */
541 _bfd_write_archive_contents,
545 BFD_JUMP_TABLE_GENERIC (bfd_plugin),
546 BFD_JUMP_TABLE_COPY (bfd_plugin),
547 BFD_JUMP_TABLE_CORE (bfd_plugin),
548 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
549 BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
550 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
551 BFD_JUMP_TABLE_WRITE (bfd_plugin),
552 BFD_JUMP_TABLE_LINK (bfd_plugin),
553 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
557 NULL /* backend_data. */
559 #endif /* BFD_SUPPORTS_PLUGIN */