| /* Plugin support for BFD. |
| Copyright (C) 2009-2024 Free Software Foundation, Inc. |
| |
| This file is part of BFD, the Binary File Descriptor library. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| MA 02110-1301, USA. */ |
| |
| #include "sysdep.h" |
| #include "bfd.h" |
| |
| #if BFD_SUPPORTS_PLUGINS |
| |
| #include <assert.h> |
| #ifdef HAVE_DLFCN_H |
| #include <dlfcn.h> |
| #elif defined (HAVE_WINDOWS_H) |
| #include <windows.h> |
| #else |
| #error Unknown how to handle dynamic-load-libraries. |
| #endif |
| #include <stdarg.h> |
| #include "plugin-api.h" |
| #include "plugin.h" |
| #include "libbfd.h" |
| #include "libiberty.h" |
| #include <dirent.h> |
| |
| #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) |
| |
| #define RTLD_NOW 0 /* Dummy value. */ |
| |
| static void * |
| dlopen (const char *file, int mode ATTRIBUTE_UNUSED) |
| { |
| return LoadLibrary (file); |
| } |
| |
| static void * |
| dlsym (void *handle, const char *name) |
| { |
| return GetProcAddress (handle, name); |
| } |
| |
| static int ATTRIBUTE_UNUSED |
| dlclose (void *handle) |
| { |
| FreeLibrary (handle); |
| return 0; |
| } |
| |
| static const char * |
| dlerror (void) |
| { |
| return "Unable to load DLL."; |
| } |
| |
| #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */ |
| |
| #define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup |
| #define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info |
| #define bfd_plugin_new_section_hook _bfd_generic_new_section_hook |
| #define bfd_plugin_get_section_contents _bfd_generic_get_section_contents |
| #define bfd_plugin_init_private_section_data _bfd_generic_init_private_section_data |
| #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
| #define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data |
| #define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data |
| #define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags |
| #define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p |
| #define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name |
| #define bfd_plugin_bfd_is_target_special_symbol _bfd_bool_bfd_asymbol_false |
| #define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno |
| #define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line |
| #define bfd_plugin_find_nearest_line_with_alt _bfd_nosymbols_find_nearest_line_with_alt |
| #define bfd_plugin_find_line _bfd_nosymbols_find_line |
| #define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info |
| #define bfd_plugin_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string |
| #define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol |
| #define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols |
| #define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol |
| #define bfd_plugin_set_arch_mach bfd_default_set_arch_mach |
| #define bfd_plugin_set_section_contents _bfd_generic_set_section_contents |
| #define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents |
| #define bfd_plugin_bfd_relax_section bfd_generic_relax_section |
| #define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create |
| #define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols |
| #define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms |
| #define bfd_plugin_bfd_final_link _bfd_generic_final_link |
| #define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section |
| #define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections |
| #define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags |
| #define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections |
| #define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section |
| #define bfd_plugin_bfd_group_name bfd_generic_group_name |
| #define bfd_plugin_bfd_discard_group bfd_generic_discard_group |
| #define bfd_plugin_section_already_linked _bfd_generic_section_already_linked |
| #define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol |
| #define bfd_plugin_bfd_link_hide_symbol _bfd_generic_link_hide_symbol |
| #define bfd_plugin_bfd_define_start_stop bfd_generic_define_start_stop |
| #define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type |
| #define bfd_plugin_bfd_link_check_relocs _bfd_generic_link_check_relocs |
| |
| static enum ld_plugin_status |
| message (int level ATTRIBUTE_UNUSED, |
| const char * format, ...) |
| { |
| va_list args; |
| va_start (args, format); |
| printf ("bfd plugin: "); |
| vprintf (format, args); |
| putchar ('\n'); |
| va_end (args); |
| return LDPS_OK; |
| } |
| |
| struct plugin_list_entry |
| { |
| /* These must be initialized for each IR object with LTO wrapper. */ |
| ld_plugin_claim_file_handler claim_file; |
| ld_plugin_claim_file_handler_v2 claim_file_v2; |
| ld_plugin_all_symbols_read_handler all_symbols_read; |
| ld_plugin_all_symbols_read_handler cleanup_handler; |
| bool has_symbol_type; |
| |
| struct plugin_list_entry *next; |
| |
| /* These can be reused for all IR objects. */ |
| const char *plugin_name; |
| }; |
| |
| static const char *plugin_program_name; |
| |
| void |
| bfd_plugin_set_program_name (const char *program_name) |
| { |
| plugin_program_name = program_name; |
| } |
| |
| static struct plugin_list_entry *plugin_list = NULL; |
| static struct plugin_list_entry *current_plugin = NULL; |
| |
| /* Register a claim-file handler. */ |
| |
| static enum ld_plugin_status |
| register_claim_file (ld_plugin_claim_file_handler handler) |
| { |
| current_plugin->claim_file = handler; |
| return LDPS_OK; |
| } |
| |
| |
| /* Register a claim-file handler, version 2. */ |
| |
| static enum ld_plugin_status |
| register_claim_file_v2 (ld_plugin_claim_file_handler_v2 handler) |
| { |
| current_plugin->claim_file_v2 = handler; |
| return LDPS_OK; |
| } |
| |
| static enum ld_plugin_status |
| add_symbols (void * handle, |
| int nsyms, |
| const struct ld_plugin_symbol * syms) |
| { |
| bfd *abfd = handle; |
| struct plugin_data_struct *plugin_data = |
| bfd_alloc (abfd, sizeof (plugin_data_struct)); |
| |
| if (!plugin_data) |
| return LDPS_ERR; |
| |
| plugin_data->nsyms = nsyms; |
| plugin_data->syms = syms; |
| |
| if (nsyms != 0) |
| abfd->flags |= HAS_SYMS; |
| |
| abfd->tdata.plugin_data = plugin_data; |
| return LDPS_OK; |
| } |
| |
| static enum ld_plugin_status |
| add_symbols_v2 (void *handle, int nsyms, |
| const struct ld_plugin_symbol *syms) |
| { |
| current_plugin->has_symbol_type = true; |
| return add_symbols (handle, nsyms, syms); |
| } |
| |
| int |
| bfd_plugin_open_input (bfd *ibfd, struct ld_plugin_input_file *file) |
| { |
| bfd *iobfd; |
| int fd; |
| |
| iobfd = ibfd; |
| while (iobfd->my_archive |
| && !bfd_is_thin_archive (iobfd->my_archive)) |
| iobfd = iobfd->my_archive; |
| file->name = bfd_get_filename (iobfd); |
| |
| if (!iobfd->iostream && !bfd_open_file (iobfd)) |
| return 0; |
| |
| /* Reuse the archive plugin file descriptor. */ |
| if (iobfd != ibfd) |
| fd = iobfd->archive_plugin_fd; |
| else |
| fd = -1; |
| |
| if (fd < 0) |
| { |
| /* The plugin API expects that the file descriptor won't be closed |
| and reused as done by the bfd file cache. So open it again. |
| dup isn't good enough. plugin IO uses lseek/read while BFD uses |
| fseek/fread. It isn't wise to mix the unistd and stdio calls on |
| the same underlying file descriptor. */ |
| fd = open (file->name, O_RDONLY | O_BINARY); |
| if (fd < 0) |
| { |
| #ifndef EMFILE |
| return 0; |
| #else |
| if (errno != EMFILE) |
| return 0; |
| |
| #ifdef HAVE_GETRLIMIT |
| struct rlimit lim; |
| |
| /* Complicated links involving lots of files and/or large |
| archives can exhaust the number of file descriptors |
| available to us. If possible, try to allocate more |
| descriptors. */ |
| if (getrlimit (RLIMIT_NOFILE, & lim) == 0 |
| && lim.rlim_cur < lim.rlim_max) |
| { |
| lim.rlim_cur = lim.rlim_max; |
| if (setrlimit (RLIMIT_NOFILE, &lim) == 0) |
| fd = open (file->name, O_RDONLY | O_BINARY); |
| } |
| |
| if (fd < 0) |
| #endif |
| { |
| _bfd_error_handler (_("plugin framework: out of file descriptors. Try using fewer objects/archives\n")); |
| return 0; |
| } |
| #endif |
| } |
| } |
| |
| if (iobfd == ibfd) |
| { |
| struct stat stat_buf; |
| |
| if (fstat (fd, &stat_buf)) |
| { |
| close (fd); |
| return 0; |
| } |
| |
| file->offset = 0; |
| file->filesize = stat_buf.st_size; |
| } |
| else |
| { |
| /* Cache the archive plugin file descriptor. */ |
| iobfd->archive_plugin_fd = fd; |
| iobfd->archive_plugin_fd_open_count++; |
| |
| file->offset = ibfd->origin; |
| file->filesize = arelt_size (ibfd); |
| } |
| |
| file->fd = fd; |
| return 1; |
| } |
| |
| /* Close the plugin file descriptor FD. If ABFD isn't NULL, it is an |
| archive member. */ |
| |
| void |
| bfd_plugin_close_file_descriptor (bfd *abfd, int fd) |
| { |
| if (abfd == NULL) |
| close (fd); |
| else |
| { |
| while (abfd->my_archive |
| && !bfd_is_thin_archive (abfd->my_archive)) |
| abfd = abfd->my_archive; |
| |
| /* Close the file descriptor if there is no archive plugin file |
| descriptor. */ |
| if (abfd->archive_plugin_fd == -1) |
| { |
| close (fd); |
| return; |
| } |
| |
| abfd->archive_plugin_fd_open_count--; |
| /* Dup the archive plugin file descriptor for later use, which |
| will be closed by _bfd_archive_close_and_cleanup. */ |
| if (abfd->archive_plugin_fd_open_count == 0) |
| { |
| abfd->archive_plugin_fd = dup (fd); |
| close (fd); |
| } |
| } |
| } |
| |
| static int |
| try_claim (bfd *abfd) |
| { |
| int claimed = 0; |
| struct ld_plugin_input_file file; |
| |
| file.handle = abfd; |
| if (bfd_plugin_open_input (abfd, &file)) |
| { |
| bool claim_file_called = false; |
| if (current_plugin->claim_file_v2) |
| { |
| current_plugin->claim_file_v2 (&file, &claimed, false); |
| claim_file_called = true; |
| } |
| else if (current_plugin->claim_file) |
| { |
| current_plugin->claim_file (&file, &claimed); |
| claim_file_called = true; |
| } |
| if (claim_file_called) |
| bfd_plugin_close_file_descriptor ((abfd->my_archive != NULL |
| ? abfd : NULL), |
| file.fd); |
| } |
| |
| return claimed; |
| } |
| |
| static bool |
| try_load_plugin (const char *pname, |
| struct plugin_list_entry *plugin_list_iter, |
| bfd *abfd, |
| bool build_list_p) |
| { |
| void *plugin_handle; |
| struct ld_plugin_tv tv[6]; |
| int i; |
| ld_plugin_onload onload; |
| enum ld_plugin_status status; |
| bool result = false; |
| |
| /* NB: Each object is independent. Reuse the previous plugin from |
| the last run will lead to wrong result. */ |
| if (current_plugin) |
| memset (current_plugin, 0, |
| offsetof (struct plugin_list_entry, next)); |
| |
| if (plugin_list_iter) |
| pname = plugin_list_iter->plugin_name; |
| |
| plugin_handle = dlopen (pname, RTLD_NOW); |
| if (!plugin_handle) |
| { |
| /* If we are building a list of viable plugins, then |
| we do not bother the user with the details of any |
| plugins that cannot be loaded. */ |
| if (! build_list_p) |
| _bfd_error_handler ("Failed to load plugin '%s', reason: %s\n", |
| pname, dlerror ()); |
| return false; |
| } |
| |
| if (plugin_list_iter == NULL) |
| { |
| size_t length_plugin_name = strlen (pname) + 1; |
| char *plugin_name = bfd_malloc (length_plugin_name); |
| |
| if (plugin_name == NULL) |
| goto short_circuit; |
| plugin_list_iter = bfd_malloc (sizeof *plugin_list_iter); |
| if (plugin_list_iter == NULL) |
| { |
| free (plugin_name); |
| goto short_circuit; |
| } |
| /* Make a copy of PNAME since PNAME from load_plugin () will be |
| freed. */ |
| memcpy (plugin_name, pname, length_plugin_name); |
| memset (plugin_list_iter, 0, sizeof (*plugin_list_iter)); |
| plugin_list_iter->plugin_name = plugin_name; |
| plugin_list_iter->next = plugin_list; |
| plugin_list = plugin_list_iter; |
| } |
| |
| current_plugin = plugin_list_iter; |
| if (build_list_p) |
| goto short_circuit; |
| |
| onload = dlsym (plugin_handle, "onload"); |
| if (!onload) |
| goto short_circuit; |
| |
| i = 0; |
| tv[i].tv_tag = LDPT_MESSAGE; |
| tv[i].tv_u.tv_message = message; |
| |
| ++i; |
| tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK; |
| tv[i].tv_u.tv_register_claim_file = register_claim_file; |
| |
| ++i; |
| tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK_V2; |
| tv[i].tv_u.tv_register_claim_file_v2 = register_claim_file_v2; |
| |
| ++i; |
| tv[i].tv_tag = LDPT_ADD_SYMBOLS; |
| tv[i].tv_u.tv_add_symbols = add_symbols; |
| |
| ++i; |
| tv[i].tv_tag = LDPT_ADD_SYMBOLS_V2; |
| tv[i].tv_u.tv_add_symbols = add_symbols_v2; |
| |
| ++i; |
| tv[i].tv_tag = LDPT_NULL; |
| tv[i].tv_u.tv_val = 0; |
| |
| /* LTO plugin will call handler hooks to set up plugin handlers. */ |
| status = (*onload)(tv); |
| |
| if (status != LDPS_OK) |
| goto short_circuit; |
| |
| abfd->plugin_format = bfd_plugin_no; |
| |
| if (!current_plugin->claim_file) |
| goto short_circuit; |
| |
| if (!try_claim (abfd)) |
| goto short_circuit; |
| |
| abfd->plugin_format = bfd_plugin_yes; |
| result = true; |
| |
| short_circuit: |
| dlclose (plugin_handle); |
| return result; |
| } |
| |
| /* There may be plugin libraries in lib/bfd-plugins. */ |
| static int has_plugin_list = -1; |
| |
| static bfd_cleanup (*ld_plugin_object_p) (bfd *, bool); |
| |
| static const char *plugin_name; |
| |
| void |
| bfd_plugin_set_plugin (const char *p) |
| { |
| plugin_name = p; |
| } |
| |
| /* Return TRUE if a plugin library is used. */ |
| |
| bool |
| bfd_plugin_specified_p (void) |
| { |
| return plugin_list != NULL; |
| } |
| |
| /* Return TRUE if ABFD can be claimed by linker LTO plugin. */ |
| |
| bool |
| bfd_link_plugin_object_p (bfd *abfd) |
| { |
| if (ld_plugin_object_p) |
| return ld_plugin_object_p (abfd, false) != NULL; |
| return false; |
| } |
| |
| extern const bfd_target plugin_vec; |
| |
| /* Return TRUE if TARGET is a pointer to plugin_vec. */ |
| |
| bool |
| bfd_plugin_target_p (const bfd_target *target) |
| { |
| return target == &plugin_vec; |
| } |
| |
| /* Register OBJECT_P to be used by bfd_plugin_object_p. */ |
| |
| void |
| register_ld_plugin_object_p (bfd_cleanup (*object_p) (bfd *, bool)) |
| { |
| ld_plugin_object_p = object_p; |
| } |
| |
| static void |
| build_plugin_list (bfd *abfd) |
| { |
| /* The intent was to search ${libdir}/bfd-plugins for plugins, but |
| unfortunately the original implementation wasn't precisely that |
| when configuring binutils using --libdir. Search in the proper |
| path first, then the old one for backwards compatibility. */ |
| static const char *path[] |
| = { LIBDIR "/bfd-plugins", BINDIR "/../lib/bfd-plugins" }; |
| struct stat last_st; |
| unsigned int i; |
| |
| if (has_plugin_list >= 0) |
| return; |
| |
| /* Try not to search the same dir twice, by looking at st_dev and |
| st_ino for the dir. If we are on a file system that always sets |
| st_ino to zero or the actual st_ino is zero we might waste some |
| time, but that doesn't matter too much. */ |
| last_st.st_dev = 0; |
| last_st.st_ino = 0; |
| for (i = 0; i < sizeof (path) / sizeof (path[0]); i++) |
| { |
| char *plugin_dir = make_relative_prefix (plugin_program_name, |
| BINDIR, |
| path[i]); |
| if (plugin_dir) |
| { |
| struct stat st; |
| DIR *d; |
| |
| if (stat (plugin_dir, &st) == 0 |
| && S_ISDIR (st.st_mode) |
| && !(last_st.st_dev == st.st_dev |
| && last_st.st_ino == st.st_ino |
| && st.st_ino != 0) |
| && (d = opendir (plugin_dir)) != NULL) |
| { |
| struct dirent *ent; |
| |
| last_st.st_dev = st.st_dev; |
| last_st.st_ino = st.st_ino; |
| while ((ent = readdir (d)) != NULL) |
| { |
| char *full_name; |
| |
| full_name = concat (plugin_dir, "/", ent->d_name, NULL); |
| if (stat (full_name, &st) == 0 && S_ISREG (st.st_mode)) |
| (void) try_load_plugin (full_name, NULL, abfd, true); |
| free (full_name); |
| } |
| closedir (d); |
| } |
| free (plugin_dir); |
| } |
| } |
| |
| has_plugin_list = plugin_list != NULL; |
| } |
| |
| static bool |
| load_plugin (bfd *abfd) |
| { |
| struct plugin_list_entry *plugin_list_iter; |
| |
| if (plugin_name) |
| return try_load_plugin (plugin_name, plugin_list, abfd, false); |
| |
| if (plugin_program_name == NULL) |
| return false; |
| |
| build_plugin_list (abfd); |
| |
| for (plugin_list_iter = plugin_list; |
| plugin_list_iter; |
| plugin_list_iter = plugin_list_iter->next) |
| if (try_load_plugin (NULL, plugin_list_iter, abfd, false)) |
| return true; |
| |
| return false; |
| } |
| |
| |
| static bfd_cleanup |
| bfd_plugin_object_p (bfd *abfd) |
| { |
| /* Since ld_plugin_object_p is called only for linker command-line input |
| objects, pass true to ld_plugin_object_p so that the same input IR |
| file won't be included twice if the LDPT_REGISTER_CLAIM_FILE_HOOK_V2 |
| isn't used. */ |
| if (ld_plugin_object_p) |
| return ld_plugin_object_p (abfd, true); |
| |
| if (abfd->plugin_format == bfd_plugin_unknown && !load_plugin (abfd)) |
| return NULL; |
| |
| return abfd->plugin_format == bfd_plugin_yes ? _bfd_no_cleanup : NULL; |
| } |
| |
| /* Copy any private info we understand from the input bfd |
| to the output bfd. */ |
| |
| static bool |
| bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| bfd *obfd ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return true; |
| } |
| |
| /* Copy any private info we understand from the input section |
| to the output section. */ |
| |
| static bool |
| bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| asection *isection ATTRIBUTE_UNUSED, |
| bfd *obfd ATTRIBUTE_UNUSED, |
| asection *osection ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return true; |
| } |
| |
| /* Copy any private info we understand from the input symbol |
| to the output symbol. */ |
| |
| static bool |
| bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, |
| asymbol *isymbol ATTRIBUTE_UNUSED, |
| bfd *obfd ATTRIBUTE_UNUSED, |
| asymbol *osymbol ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return true; |
| } |
| |
| static bool |
| bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, void *ptr ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return true; |
| } |
| |
| static char * |
| bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return NULL; |
| } |
| |
| static int |
| bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return 0; |
| } |
| |
| static int |
| bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return 0; |
| } |
| |
| static long |
| bfd_plugin_get_symtab_upper_bound (bfd *abfd) |
| { |
| struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; |
| long nsyms = plugin_data->nsyms; |
| |
| BFD_ASSERT (nsyms >= 0); |
| |
| return ((nsyms + 1) * sizeof (asymbol *)); |
| } |
| |
| static flagword |
| convert_flags (const struct ld_plugin_symbol *sym) |
| { |
| switch (sym->def) |
| { |
| case LDPK_DEF: |
| case LDPK_COMMON: |
| case LDPK_UNDEF: |
| return BSF_GLOBAL; |
| |
| case LDPK_WEAKUNDEF: |
| case LDPK_WEAKDEF: |
| return BSF_GLOBAL | BSF_WEAK; |
| |
| default: |
| BFD_ASSERT (0); |
| return 0; |
| } |
| } |
| |
| static long |
| bfd_plugin_canonicalize_symtab (bfd *abfd, |
| asymbol **alocation) |
| { |
| struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data; |
| long nsyms = plugin_data->nsyms; |
| const struct ld_plugin_symbol *syms = plugin_data->syms; |
| static asection fake_text_section |
| = BFD_FAKE_SECTION (fake_text_section, NULL, "plug", 0, |
| SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS); |
| static asection fake_data_section |
| = BFD_FAKE_SECTION (fake_data_section, NULL, "plug", 0, |
| SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS); |
| static asection fake_bss_section |
| = BFD_FAKE_SECTION (fake_bss_section, NULL, "plug", 0, |
| SEC_ALLOC); |
| static asection fake_common_section |
| = BFD_FAKE_SECTION (fake_common_section, NULL, "plug", 0, SEC_IS_COMMON); |
| int i; |
| |
| for (i = 0; i < nsyms; i++) |
| { |
| asymbol *s = bfd_alloc (abfd, sizeof (asymbol)); |
| |
| BFD_ASSERT (s); |
| alocation[i] = s; |
| |
| s->the_bfd = abfd; |
| s->name = syms[i].name; |
| s->value = 0; |
| s->flags = convert_flags (&syms[i]); |
| switch (syms[i].def) |
| { |
| case LDPK_COMMON: |
| s->section = &fake_common_section; |
| break; |
| case LDPK_UNDEF: |
| case LDPK_WEAKUNDEF: |
| s->section = bfd_und_section_ptr; |
| break; |
| case LDPK_DEF: |
| case LDPK_WEAKDEF: |
| if (current_plugin->has_symbol_type) |
| switch (syms[i].symbol_type) |
| { |
| default: |
| /* FIXME: Should we issue an error here ? */ |
| case LDST_UNKNOWN: |
| /* What is the best fake section for LDST_UNKNOWN? */ |
| case LDST_FUNCTION: |
| s->section = &fake_text_section; |
| break; |
| case LDST_VARIABLE: |
| if (syms[i].section_kind == LDSSK_BSS) |
| s->section = &fake_bss_section; |
| else |
| s->section = &fake_data_section; |
| break; |
| } |
| else |
| s->section = &fake_text_section; |
| break; |
| default: |
| BFD_ASSERT (0); |
| } |
| |
| s->udata.p = (void *) &syms[i]; |
| } |
| |
| return nsyms; |
| } |
| |
| static void |
| bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED, |
| void *afile ATTRIBUTE_UNUSED, |
| asymbol *symbol ATTRIBUTE_UNUSED, |
| bfd_print_symbol_type how ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| } |
| |
| static void |
| bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, |
| asymbol *symbol, |
| symbol_info *ret) |
| { |
| bfd_symbol_info (symbol, ret); |
| } |
| |
| /* Make an empty symbol. */ |
| |
| static asymbol * |
| bfd_plugin_make_empty_symbol (bfd *abfd) |
| { |
| asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol)); |
| if (new_symbol == NULL) |
| return new_symbol; |
| new_symbol->the_bfd = abfd; |
| return new_symbol; |
| } |
| |
| static int |
| bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, |
| struct bfd_link_info *info ATTRIBUTE_UNUSED) |
| { |
| BFD_ASSERT (0); |
| return 0; |
| } |
| |
| const bfd_target plugin_vec = |
| { |
| "plugin", /* Name. */ |
| bfd_target_unknown_flavour, |
| BFD_ENDIAN_LITTLE, /* Target byte order. */ |
| BFD_ENDIAN_LITTLE, /* Target headers byte order. */ |
| (HAS_RELOC | EXEC_P | /* Object flags. */ |
| HAS_LINENO | HAS_DEBUG | |
| HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED), |
| (SEC_CODE | SEC_DATA | SEC_ROM | SEC_HAS_CONTENTS |
| | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* Section flags. */ |
| 0, /* symbol_leading_char. */ |
| '/', /* ar_pad_char. */ |
| 15, /* ar_max_namelen. */ |
| 255, /* match priority. */ |
| TARGET_KEEP_UNUSED_SECTION_SYMBOLS, /* keep unused section symbols. */ |
| |
| bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */ |
| bfd_getl64, bfd_getl_signed_64, bfd_putl64, |
| bfd_getl32, bfd_getl_signed_32, bfd_putl32, |
| bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */ |
| |
| { /* bfd_check_format. */ |
| _bfd_dummy_target, |
| bfd_plugin_object_p, |
| bfd_generic_archive_p, |
| _bfd_dummy_target |
| }, |
| { /* bfd_set_format. */ |
| _bfd_bool_bfd_false_error, |
| _bfd_bool_bfd_false_error, |
| _bfd_generic_mkarchive, |
| _bfd_bool_bfd_false_error, |
| }, |
| { /* bfd_write_contents. */ |
| _bfd_bool_bfd_false_error, |
| _bfd_bool_bfd_false_error, |
| _bfd_write_archive_contents, |
| _bfd_bool_bfd_false_error, |
| }, |
| |
| BFD_JUMP_TABLE_GENERIC (bfd_plugin), |
| BFD_JUMP_TABLE_COPY (bfd_plugin), |
| BFD_JUMP_TABLE_CORE (bfd_plugin), |
| #ifdef USE_64_BIT_ARCHIVE |
| BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_64_bit), |
| #else |
| BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff), |
| #endif |
| BFD_JUMP_TABLE_SYMBOLS (bfd_plugin), |
| BFD_JUMP_TABLE_RELOCS (_bfd_norelocs), |
| BFD_JUMP_TABLE_WRITE (bfd_plugin), |
| BFD_JUMP_TABLE_LINK (bfd_plugin), |
| BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic), |
| |
| NULL, |
| |
| NULL /* backend_data. */ |
| }; |
| #endif /* BFD_SUPPORTS_PLUGINS */ |