/* Plugin support for BFD.
- Copyright (C) 2009-2016 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#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_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_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
-#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_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_boolean (*) (bfd *, asymbol *)) bfd_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_line _bfd_nosymbols_find_line
-#define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
+#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_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_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_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_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_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
+#define bfd_plugin_bfd_link_check_relocs _bfd_generic_link_check_relocs
static enum ld_plugin_status
message (int level ATTRIBUTE_UNUSED,
}
/* Register a claim-file handler. */
-static ld_plugin_claim_file_handler claim_file;
+static ld_plugin_claim_file_handler claim_file = NULL;
static enum ld_plugin_status
register_claim_file (ld_plugin_claim_file_handler handler)
plugin_program_name = program_name;
}
-static int
-try_claim (bfd *abfd)
+int
+bfd_plugin_open_input (bfd *ibfd, struct ld_plugin_input_file *file)
{
- int claimed = 0;
- struct ld_plugin_input_file file;
bfd *iobfd;
- file.name = abfd->filename;
-
- if (abfd->my_archive && !bfd_is_thin_archive (abfd->my_archive))
- {
- iobfd = abfd->my_archive;
- file.offset = abfd->origin;
- file.filesize = arelt_size (abfd);
- }
- else
- {
- iobfd = abfd;
- file.offset = 0;
- file.filesize = 0;
- }
+ iobfd = ibfd;
+ while (iobfd->my_archive
+ && !bfd_is_thin_archive (iobfd->my_archive))
+ iobfd = iobfd->my_archive;
+ file->name = iobfd->filename;
if (!iobfd->iostream && !bfd_open_file (iobfd))
return 0;
- file.fd = fileno ((FILE *) iobfd->iostream);
+ /* 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. */
+ file->fd = open (file->name, O_RDONLY | O_BINARY);
+ if (file->fd < 0)
+ return 0;
- if (!abfd->my_archive || bfd_is_thin_archive (abfd->my_archive))
+ if (iobfd == ibfd)
{
struct stat stat_buf;
- if (fstat (file.fd, &stat_buf))
- return 0;
- file.filesize = stat_buf.st_size;
+
+ if (fstat (file->fd, &stat_buf))
+ {
+ close(file->fd);
+ return 0;
+ }
+
+ file->offset = 0;
+ file->filesize = stat_buf.st_size;
}
+ else
+ {
+ file->offset = ibfd->origin;
+ file->filesize = arelt_size (ibfd);
+ }
+ return 1;
+}
+
+static int
+try_claim (bfd *abfd)
+{
+ int claimed = 0;
+ struct ld_plugin_input_file file;
file.handle = abfd;
- off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
- claim_file (&file, &claimed);
- lseek(file.fd, cur_offset, SEEK_SET);
- if (!claimed)
+ if (!bfd_plugin_open_input (abfd, &file))
return 0;
-
- return 1;
+ if (claim_file)
+ claim_file (&file, &claimed);
+ close (file.fd);
+ return claimed;
}
+struct plugin_list_entry
+{
+ void * handle;
+ ld_plugin_claim_file_handler claim_file;
+ struct plugin_list_entry * next;
+};
+
+static struct plugin_list_entry * plugin_list = NULL;
+
static int
try_load_plugin (const char *pname, bfd *abfd, int *has_plugin_p)
{
- void *plugin_handle;
+ void *plugin_handle = NULL;
struct ld_plugin_tv tv[4];
int i;
ld_plugin_onload onload;
enum ld_plugin_status status;
+ struct plugin_list_entry *plugin_list_iter;
*has_plugin_p = 0;
plugin_handle = dlopen (pname, RTLD_NOW);
if (!plugin_handle)
{
- (*_bfd_error_handler)("%s\n", dlerror ());
+ _bfd_error_handler ("%s\n", dlerror ());
return 0;
}
+ for (plugin_list_iter = plugin_list;
+ plugin_list_iter;
+ plugin_list_iter = plugin_list_iter->next)
+ {
+ if (plugin_handle == plugin_list_iter->handle)
+ {
+ dlclose (plugin_handle);
+ if (!plugin_list_iter->claim_file)
+ return 0;
+
+ register_claim_file (plugin_list_iter->claim_file);
+ goto have_claim_file;
+ }
+ }
+
+ plugin_list_iter = (struct plugin_list_entry *) xmalloc (sizeof *plugin_list_iter);
+ plugin_list_iter->handle = plugin_handle;
+ plugin_list_iter->claim_file = NULL;
+ plugin_list_iter->next = plugin_list;
+ plugin_list = plugin_list_iter;
+
onload = dlsym (plugin_handle, "onload");
if (!onload)
- goto err;
+ return 0;
i = 0;
tv[i].tv_tag = LDPT_MESSAGE;
status = (*onload)(tv);
if (status != LDPS_OK)
- goto err;
+ return 0;
+
+ plugin_list_iter->claim_file = claim_file;
+have_claim_file:
*has_plugin_p = 1;
abfd->plugin_format = bfd_plugin_no;
if (!claim_file)
- goto err;
+ return 0;
if (!try_claim (abfd))
- goto err;
+ return 0;
abfd->plugin_format = bfd_plugin_yes;
-
return 1;
-
- err:
- return 0;
}
/* There may be plugin libraries in lib/bfd-plugins. */
int valid_plugin;
full_name = concat (p, "/", ent->d_name, NULL);
- if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
+ if (stat (full_name, &s) == 0 && S_ISREG (s.st_mode))
found = try_load_plugin (full_name, abfd, &valid_plugin);
if (has_plugin <= 0)
has_plugin = valid_plugin;
_bfd_dummy_target
},
{ /* bfd_set_format. */
- bfd_false,
- bfd_false,
+ _bfd_bool_bfd_false_error,
+ _bfd_bool_bfd_false_error,
_bfd_generic_mkarchive,
- bfd_false,
+ _bfd_bool_bfd_false_error,
},
{ /* bfd_write_contents. */
- bfd_false,
- bfd_false,
+ _bfd_bool_bfd_false_error,
+ _bfd_bool_bfd_false_error,
_bfd_write_archive_contents,
- bfd_false,
+ _bfd_bool_bfd_false_error,
},
BFD_JUMP_TABLE_GENERIC (bfd_plugin),
NULL,
- NULL /* backend_data. */
+ NULL /* backend_data. */
};
#endif /* BFD_SUPPORTS_PLUGIN */