/* 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_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
+#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)
- {
- 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)
+ 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 = bfd_malloc (sizeof *plugin_list_iter);
+ if (plugin_list_iter == NULL)
+ return 0;
+ 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. */
return has_plugin > 0;
}
+/* Return TRUE if ABFD can be claimed by linker LTO plugin. */
+
+bfd_boolean
+bfd_link_plugin_object_p (bfd *abfd)
+{
+ if (ld_plugin_object_p)
+ return ld_plugin_object_p (abfd) != NULL;
+ return FALSE;
+}
+
extern const bfd_target plugin_vec;
/* Return TRUE if TARGET is a pointer to plugin_vec. */
static int
load_plugin (bfd *abfd)
{
- char *plugin_dir;
- char *p;
- DIR *d;
- struct dirent *ent;
+ /* 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;
int found = 0;
+ unsigned int i;
if (!has_plugin)
return found;
if (plugin_program_name == NULL)
return found;
- plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
- p = make_relative_prefix (plugin_program_name,
- BINDIR,
- plugin_dir);
- free (plugin_dir);
- plugin_dir = NULL;
-
- d = opendir (p);
- if (!d)
- goto out;
-
- while ((ent = readdir (d)))
+ /* 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 *full_name;
- struct stat s;
- int valid_plugin;
-
- full_name = concat (p, "/", ent->d_name, NULL);
- 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;
- free (full_name);
+ 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))
+ {
+ int valid_plugin;
+
+ found = try_load_plugin (full_name, abfd, &valid_plugin);
+ if (has_plugin <= 0)
+ has_plugin = valid_plugin;
+ }
+ free (full_name);
+ if (found)
+ break;
+ }
+ closedir (d);
+ }
+ free (plugin_dir);
+ }
if (found)
break;
}
- out:
- free (p);
- if (d)
- closedir (d);
-
return found;
}
if (ld_plugin_object_p)
return ld_plugin_object_p (abfd);
- if (abfd->plugin_format == bfd_plugin_uknown && !load_plugin (abfd))
+ if (abfd->plugin_format == bfd_plugin_unknown && !load_plugin (abfd))
return NULL;
return abfd->plugin_format == bfd_plugin_yes ? abfd->xvec : NULL;
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_section;
- static asection fake_common_section;
+ static asection fake_section
+ = BFD_FAKE_SECTION (fake_section, NULL, "plug", 0,
+ SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS);
+ static asection fake_common_section
+ = BFD_FAKE_SECTION (fake_common_section, NULL, "plug", 0, SEC_IS_COMMON);
int i;
- fake_section.name = ".text";
- fake_common_section.flags = SEC_IS_COMMON;
-
for (i = 0; i < nsyms; i++)
{
asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
_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),
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),
NULL,
- NULL /* backend_data. */
+ NULL /* backend_data. */
};
#endif /* BFD_SUPPORTS_PLUGIN */
projects / deliverable / binutils-gdb.git / blobdiff