1 /* Plugin support for BFD.
3 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
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 #if BFD_SUPPORTS_PLUGINS
30 #include "plugin-api.h"
34 #include "libiberty.h"
37 #define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup
38 #define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
39 #define bfd_plugin_new_section_hook _bfd_generic_new_section_hook
40 #define bfd_plugin_get_section_contents _bfd_generic_get_section_contents
41 #define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
42 #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
43 #define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
44 #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
45 #define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
46 #define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p
47 #define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
48 #define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
49 #define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno
50 #define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line
51 #define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
52 #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
53 #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
54 #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
55 #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
56 #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
57 #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
58 #define bfd_plugin_bfd_relax_section bfd_generic_relax_section
59 #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
60 #define bfd_plugin_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
61 #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
62 #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
63 #define bfd_plugin_bfd_final_link _bfd_generic_final_link
64 #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
65 #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
66 #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
67 #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
68 #define bfd_plugin_bfd_discard_group bfd_generic_discard_group
69 #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
70 #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
71 #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
73 static enum ld_plugin_status
74 message (int level ATTRIBUTE_UNUSED,
75 const char * format, ...)
78 va_start (args, format);
79 printf ("bfd plugin: ");
80 vprintf (format, args);
85 /* Register a claim-file handler. */
86 static ld_plugin_claim_file_handler claim_file;
88 static enum ld_plugin_status
89 register_claim_file (ld_plugin_claim_file_handler handler)
95 static enum ld_plugin_status
96 add_symbols (void * handle,
98 const struct ld_plugin_symbol * syms)
101 struct plugin_data_struct *plugin_data =
102 bfd_alloc (abfd, sizeof (plugin_data_struct));;
104 plugin_data->nsyms = nsyms;
105 plugin_data->syms = syms;
108 abfd->flags |= HAS_SYMS;
110 abfd->tdata.plugin_data = plugin_data;
114 static const char *plugin_program_name;
117 bfd_plugin_set_program_name (const char *program_name)
119 plugin_program_name = program_name;
123 try_load_plugin (const char *pname)
125 static void *plugin_handle;
127 struct ld_plugin_tv tv[tv_size];
129 ld_plugin_onload onload;
130 enum ld_plugin_status status;
132 plugin_handle = dlopen (pname, RTLD_NOW);
135 (*_bfd_error_handler)("%s\n", dlerror ());
139 onload = dlsym (plugin_handle, "onload");
144 tv[i].tv_tag = LDPT_MESSAGE;
145 tv[i].tv_u.tv_message = message;
148 tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
149 tv[i].tv_u.tv_register_claim_file = register_claim_file;
152 tv[i].tv_tag = LDPT_ADD_SYMBOLS;
153 tv[i].tv_u.tv_add_symbols = add_symbols;
156 tv[i].tv_tag = LDPT_NULL;
157 tv[i].tv_u.tv_val = 0;
159 status = (*onload)(tv);
161 if (status != LDPS_OK)
170 plugin_handle = NULL;
174 static const char *plugin_name;
177 bfd_plugin_set_plugin (const char *p)
192 return try_load_plugin (plugin_name);
194 if (plugin_program_name == NULL)
197 plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
198 p = make_relative_prefix (plugin_program_name,
208 while ((ent = readdir (d)))
213 full_name = concat (p, "/", ent->d_name, NULL);
214 if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
215 found = try_load_plugin (full_name);
230 static const bfd_target *
231 bfd_plugin_object_p (bfd *abfd)
234 int t = load_plugin ();
235 struct ld_plugin_input_file file;
241 file.name = abfd->filename;
243 if (abfd->my_archive)
245 iobfd = abfd->my_archive;
246 file.offset = abfd->origin;
247 file.filesize = arelt_size (abfd);
253 file.filesize = 0; /*FIXME*/
256 if (!iobfd->iostream && !bfd_open_file (iobfd))
259 file.fd = fileno ((FILE *) iobfd->iostream);
262 claim_file (&file, &claimed);
269 /* Copy any private info we understand from the input bfd
270 to the output bfd. */
273 bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
274 bfd *obfd ATTRIBUTE_UNUSED)
280 /* Copy any private info we understand from the input section
281 to the output section. */
284 bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
285 asection *isection ATTRIBUTE_UNUSED,
286 bfd *obfd ATTRIBUTE_UNUSED,
287 asection *osection ATTRIBUTE_UNUSED)
293 /* Copy any private info we understand from the input symbol
294 to the output symbol. */
297 bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
298 asymbol *isymbol ATTRIBUTE_UNUSED,
299 bfd *obfd ATTRIBUTE_UNUSED,
300 asymbol *osymbol ATTRIBUTE_UNUSED)
307 bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
314 bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
321 bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
328 bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
335 bfd_plugin_get_symtab_upper_bound (bfd *abfd)
337 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
338 long nsyms = plugin_data->nsyms;
340 BFD_ASSERT (nsyms >= 0);
342 return ((nsyms + 1) * sizeof (asymbol *));
346 convert_flags (const struct ld_plugin_symbol *sym)
357 return BSF_GLOBAL | BSF_WEAK;
366 bfd_plugin_canonicalize_symtab (bfd *abfd,
369 struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
370 long nsyms = plugin_data->nsyms;
371 const struct ld_plugin_symbol *syms = plugin_data->syms;
372 static asection fake_section;
373 static asection fake_common_section;
376 fake_section.name = ".text";
377 fake_common_section.flags = SEC_IS_COMMON;
379 for (i = 0; i < nsyms; i++)
381 asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
387 s->name = syms[i].name;
389 s->flags = convert_flags (&syms[i]);
393 s->section = &fake_common_section;
397 s->section = bfd_und_section_ptr;
401 s->section = &fake_section;
407 s->udata.p = (void *) &syms[i];
414 bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
415 PTR afile ATTRIBUTE_UNUSED,
416 asymbol *symbol ATTRIBUTE_UNUSED,
417 bfd_print_symbol_type how ATTRIBUTE_UNUSED)
423 bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
427 bfd_symbol_info (symbol, ret);
430 /* Make an empty symbol. */
433 bfd_plugin_make_empty_symbol (bfd *abfd)
435 asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
436 if (new_symbol == NULL)
438 new_symbol->the_bfd = abfd;
443 bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
444 struct bfd_link_info *info ATTRIBUTE_UNUSED)
451 bfd_plugin_mkobject (bfd *abfd ATTRIBUTE_UNUSED)
457 const bfd_target plugin_vec =
459 "plugin", /* Name. */
460 bfd_target_unknown_flavour,
461 BFD_ENDIAN_LITTLE, /* Target byte order. */
462 BFD_ENDIAN_LITTLE, /* Target headers byte order. */
463 (HAS_RELOC | EXEC_P | /* Object flags. */
464 HAS_LINENO | HAS_DEBUG |
465 HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
466 (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS
467 | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */
468 0, /* symbol_leading_char. */
469 '/', /* ar_pad_char. */
470 15, /* ar_max_namelen. */
472 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
473 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
474 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
475 bfd_getl64, bfd_getl_signed_64, bfd_putl64,
476 bfd_getl32, bfd_getl_signed_32, bfd_putl32,
477 bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
479 { /* bfd_check_format. */
482 bfd_generic_archive_p,
485 { /* bfd_set_format. */
488 _bfd_generic_mkarchive,
491 { /* bfd_write_contents. */
494 _bfd_write_archive_contents,
498 BFD_JUMP_TABLE_GENERIC (bfd_plugin),
499 BFD_JUMP_TABLE_COPY (bfd_plugin),
500 BFD_JUMP_TABLE_CORE (bfd_plugin),
501 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
502 BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
503 BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
504 BFD_JUMP_TABLE_WRITE (bfd_plugin),
505 BFD_JUMP_TABLE_LINK (bfd_plugin),
506 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
510 NULL /* backend_data. */
512 #endif /* BFD_SUPPORTS_PLUGIN */