[deliverable/binutils-gdb.git] / bfd / plugin.c

/* Plugin support for BFD.
   Copyright 2009, 2010, 2011
   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 "config.h"
#include "bfd.h"

#if BFD_SUPPORTS_PLUGINS

#include <assert.h>
#include <dlfcn.h>
#include <stdarg.h>
#include "plugin-api.h"
#include "sysdep.h"
#include "plugin.h"
#include "libbfd.h"
#include "libiberty.h"
#include <dirent.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_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_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_inliner_info                  _bfd_nosymbols_find_inliner_info
#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_hash_table_free           _bfd_generic_link_hash_table_free
#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_copy_link_hash_symbol_type     _bfd_generic_copy_link_hash_symbol_type

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;
}

/* Register a claim-file handler. */
static ld_plugin_claim_file_handler claim_file;

static enum ld_plugin_status
register_claim_file (ld_plugin_claim_file_handler handler)
{
  claim_file = 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));;

  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 const char *plugin_program_name;

void
bfd_plugin_set_program_name (const char *program_name)
{
  plugin_program_name = program_name;
}

static int
try_load_plugin (const char *pname)
{
  static void *plugin_handle;
  int tv_size = 4;
  struct ld_plugin_tv tv[tv_size];
  int i;
  ld_plugin_onload onload;
  enum ld_plugin_status status;

  plugin_handle = dlopen (pname, RTLD_NOW);
  if (!plugin_handle)
    {
      (*_bfd_error_handler)("%s\n", dlerror ());
      return 0;
    }

  onload = dlsym (plugin_handle, "onload");
  if (!onload)
    goto err;

  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_ADD_SYMBOLS;
  tv[i].tv_u.tv_add_symbols = add_symbols;

  ++i;
  tv[i].tv_tag = LDPT_NULL;
  tv[i].tv_u.tv_val = 0;

  status = (*onload)(tv);

  if (status != LDPS_OK)
    goto err;

  if (!claim_file)
    goto err;

  return 1;

 err:
  plugin_handle = NULL;
  return 0;
}

static const char *plugin_name;

void
bfd_plugin_set_plugin (const char *p)
{
  plugin_name = p;
}

static int
load_plugin (void)
{
  char *plugin_dir;
  char *p;
  DIR *d;
  struct dirent *ent;
  int found = 0;

  if (plugin_name)
    return try_load_plugin (plugin_name);

  if (plugin_program_name == NULL)
    return 0;

  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)))
    {
      char *full_name;
      struct stat s;

      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);
      free (full_name);
      if (found)
	break;
    }

 out:
  free (p);
  if (d)
    closedir (d);

  return found;
}


static const bfd_target *
bfd_plugin_object_p (bfd *abfd)
{
  int claimed = 0;
  struct ld_plugin_input_file file;
  bfd *iobfd;
  static int have_loaded = 0;
  static int have_plugin = 0;

  if (!have_loaded)
    {
      have_loaded = 1;
      have_plugin = load_plugin ();
    }
  if (!have_plugin)
    return NULL;

  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;
    }

  if (!iobfd->iostream && !bfd_open_file (iobfd))
    return NULL;

  file.fd = fileno ((FILE *) iobfd->iostream);

  if (!abfd->my_archive)
    {
      struct stat stat_buf;
      if (fstat (file.fd, &stat_buf))
        return NULL;
      file.filesize = stat_buf.st_size;
    }

  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)
    return NULL;

  return abfd->xvec;
}

/* Copy any private info we understand from the input bfd
   to the output bfd.  */

static bfd_boolean
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 bfd_boolean
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 bfd_boolean
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 bfd_boolean
bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR 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_section;
  static asection fake_common_section;
  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_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:
	  s->section = &fake_section;
	  break;
	default:
	  BFD_ASSERT (0);
	}

      s->udata.p = (void *) &syms[i];
    }

  return nsyms;
}

static void
bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
			 PTR 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.  */
  0,				/* match priority.  */

  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_false,
    bfd_false,
    _bfd_generic_mkarchive,
    bfd_false,
  },
  {				/* bfd_write_contents.  */
    bfd_false,
    bfd_false,
    _bfd_write_archive_contents,
    bfd_false,
  },

  BFD_JUMP_TABLE_GENERIC (bfd_plugin),
  BFD_JUMP_TABLE_COPY (bfd_plugin),
  BFD_JUMP_TABLE_CORE (bfd_plugin),
  BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
  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_PLUGIN */
Commit	Line	Data
ce3c775b	1	/* Plugin support for BFD.
0aabe54e	2	Copyright 2009, 2010, 2011
ce3c775b NC	3	Free Software Foundation, Inc.
	4
	5	This file is part of BFD, the Binary File Descriptor library.
	6
	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.
	11
	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.
	16
	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. */
	21
	22	#include "config.h"
98950613 AM	23	#include "bfd.h"
	24
	25	#if BFD_SUPPORTS_PLUGINS
	26
ce3c775b NC	27	#include <assert.h>
	28	#include <dlfcn.h>
	29	#include <stdarg.h>
	30	#include "plugin-api.h"
	31	#include "sysdep.h"
	32	#include "plugin.h"
	33	#include "libbfd.h"
	34	#include "libiberty.h"
	35	#include <dirent.h>
	36
	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
ae17ab41	66	#define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags
ce3c775b NC	67	#define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
	68	#define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
	69	#define bfd_plugin_bfd_discard_group bfd_generic_discard_group
	70	#define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
	71	#define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
69a630b5	72	#define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
ce3c775b NC	73
	74	static enum ld_plugin_status
	75	message (int level ATTRIBUTE_UNUSED,
	76	const char * format, ...)
	77	{
	78	va_list args;
	79	va_start (args, format);
	80	printf ("bfd plugin: ");
	81	vprintf (format, args);
d9b21463	82	putchar ('\n');
ce3c775b NC	83	va_end (args);
	84	return LDPS_OK;
	85	}
	86
	87	/* Register a claim-file handler. */
	88	static ld_plugin_claim_file_handler claim_file;
	89
	90	static enum ld_plugin_status
	91	register_claim_file (ld_plugin_claim_file_handler handler)
	92	{
	93	claim_file = handler;
	94	return LDPS_OK;
	95	}
	96
	97	static enum ld_plugin_status
	98	add_symbols (void * handle,
	99	int nsyms,
	100	const struct ld_plugin_symbol * syms)
	101	{
	102	bfd *abfd = handle;
	103	struct plugin_data_struct *plugin_data =
	104	bfd_alloc (abfd, sizeof (plugin_data_struct));;
	105
	106	plugin_data->nsyms = nsyms;
	107	plugin_data->syms = syms;
	108
	109	if (nsyms != 0)
	110	abfd->flags \|= HAS_SYMS;
	111
	112	abfd->tdata.plugin_data = plugin_data;
	113	return LDPS_OK;
	114	}
	115
fc579192 NC	116	static const char *plugin_program_name;
	117
	118	void
	119	bfd_plugin_set_program_name (const char *program_name)
	120	{
	121	plugin_program_name = program_name;
	122	}
ce3c775b NC	123
	124	static int
	125	try_load_plugin (const char *pname)
	126	{
	127	static void *plugin_handle;
	128	int tv_size = 4;
	129	struct ld_plugin_tv tv[tv_size];
	130	int i;
	131	ld_plugin_onload onload;
	132	enum ld_plugin_status status;
	133
	134	plugin_handle = dlopen (pname, RTLD_NOW);
	135	if (!plugin_handle)
	136	{
	137	(*_bfd_error_handler)("%s\n", dlerror ());
	138	return 0;
	139	}
	140
	141	onload = dlsym (plugin_handle, "onload");
	142	if (!onload)
	143	goto err;
	144
	145	i = 0;
	146	tv[i].tv_tag = LDPT_MESSAGE;
	147	tv[i].tv_u.tv_message = message;
	148
	149	++i;
	150	tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
	151	tv[i].tv_u.tv_register_claim_file = register_claim_file;
	152
	153	++i;
	154	tv[i].tv_tag = LDPT_ADD_SYMBOLS;
	155	tv[i].tv_u.tv_add_symbols = add_symbols;
	156
	157	++i;
	158	tv[i].tv_tag = LDPT_NULL;
	159	tv[i].tv_u.tv_val = 0;
	160
	161	status = (*onload)(tv);
	162
	163	if (status != LDPS_OK)
	164	goto err;
	165
	166	if (!claim_file)
	167	goto err;
	168
	169	return 1;
	170
	171	err:
	172	plugin_handle = NULL;
	173	return 0;
	174	}
	175
	176	static const char *plugin_name;
	177
	178	void
	179	bfd_plugin_set_plugin (const char *p)
	180	{
	181	plugin_name = p;
	182	}
	183
	184	static int
	185	load_plugin (void)
	186	{
187	char *plugin_dir;
188	char *p;
189	DIR *d;
190	struct dirent *ent;
191	int found = 0;
192
193	if (plugin_name)
194	return try_load_plugin (plugin_name);
195
fc579192	196	if (plugin_program_name == NULL)
ce3c775b NC	197	return 0;
	198
	199	plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
fc579192	200	p = make_relative_prefix (plugin_program_name,
ce3c775b NC	201	BINDIR,
	202	plugin_dir);
	203	free (plugin_dir);
	204	plugin_dir = NULL;
	205
	206	d = opendir (p);
	207	if (!d)
	208	goto out;
	209
	210	while ((ent = readdir (d)))
	211	{
	212	char *full_name;
c41ba836	213	struct stat s;
ce3c775b NC	214
ce3c775b NC	215	full_name = concat (p, "/", ent->d_name, NULL);
c41ba836 DK	216	if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
c41ba836 DK	217	found = try_load_plugin (full_name);
ce3c775b NC	218	free (full_name);
	219	if (found)
	220	break;
	221	}
	222
	223	out:
	224	free (p);
	225	if (d)
	226	closedir (d);
	227
	228	return found;
	229	}
	230
	231
	232	static const bfd_target *
	233	bfd_plugin_object_p (bfd *abfd)
	234	{
	235	int claimed = 0;
ce3c775b	236	struct ld_plugin_input_file file;
028ed2b2	237	bfd *iobfd;
80549d04 RÁE	238	static int have_loaded = 0;
80549d04 RÁE	239	static int have_plugin = 0;
028ed2b2	240
80549d04 RÁE	241	if (!have_loaded)
	242	{
	243	have_loaded = 1;
	244	have_plugin = load_plugin ();
	245	}
	246	if (!have_plugin)
ce3c775b NC	247	return NULL;
	248
	249	file.name = abfd->filename;
	250
028ed2b2	251	if (abfd->my_archive)
ce3c775b	252	{
028ed2b2 L	253	iobfd = abfd->my_archive;
	254	file.offset = abfd->origin;
	255	file.filesize = arelt_size (abfd);
ce3c775b NC	256	}
	257	else
	258	{
028ed2b2 L	259	iobfd = abfd;
028ed2b2 L	260	file.offset = 0;
80549d04	261	file.filesize = 0;
ce3c775b	262	}
028ed2b2 L	263
	264	if (!iobfd->iostream && !bfd_open_file (iobfd))
	265	return NULL;
	266
	267	file.fd = fileno ((FILE *) iobfd->iostream);
	268
80549d04 RÁE	269	if (!abfd->my_archive)
	270	{
	271	struct stat stat_buf;
	272	if (fstat (file.fd, &stat_buf))
	273	return NULL;
	274	file.filesize = stat_buf.st_size;
	275	}
	276
ce3c775b	277	file.handle = abfd;
80549d04	278	off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
ce3c775b	279	claim_file (&file, &claimed);
80549d04	280	lseek(file.fd, cur_offset, SEEK_SET);
ce3c775b NC	281	if (!claimed)
	282	return NULL;
	283
	284	return abfd->xvec;
	285	}
	286
	287	/* Copy any private info we understand from the input bfd
	288	to the output bfd. */
	289
	290	static bfd_boolean
	291	bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
	292	bfd *obfd ATTRIBUTE_UNUSED)
	293	{
	294	BFD_ASSERT (0);
	295	return TRUE;
	296	}
	297
	298	/* Copy any private info we understand from the input section
	299	to the output section. */
	300
	301	static bfd_boolean
	302	bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
	303	asection *isection ATTRIBUTE_UNUSED,
	304	bfd *obfd ATTRIBUTE_UNUSED,
	305	asection *osection ATTRIBUTE_UNUSED)
	306	{
	307	BFD_ASSERT (0);
	308	return TRUE;
	309	}
	310
	311	/* Copy any private info we understand from the input symbol
	312	to the output symbol. */
	313
	314	static bfd_boolean
	315	bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
	316	asymbol *isymbol ATTRIBUTE_UNUSED,
	317	bfd *obfd ATTRIBUTE_UNUSED,
	318	asymbol *osymbol ATTRIBUTE_UNUSED)
	319	{
	320	BFD_ASSERT (0);
	321	return TRUE;
	322	}
	323
	324	static bfd_boolean
	325	bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
	326	{
	327	BFD_ASSERT (0);
	328	return TRUE;
	329	}
	330
	331	static char *
	332	bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
	333	{
	334	BFD_ASSERT (0);
	335	return NULL;
	336	}
	337
	338	static int
	339	bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
261b8d08 PA	340	{
	341	BFD_ASSERT (0);
	342	return 0;
	343	}
	344
	345	static int
	346	bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
ce3c775b NC	347	{
	348	BFD_ASSERT (0);
	349	return 0;
	350	}
	351
	352	static long
	353	bfd_plugin_get_symtab_upper_bound (bfd *abfd)
	354	{
	355	struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
	356	long nsyms = plugin_data->nsyms;
	357
	358	BFD_ASSERT (nsyms >= 0);
	359
	360	return ((nsyms + 1) * sizeof (asymbol *));
	361	}
	362
	363	static flagword
	364	convert_flags (const struct ld_plugin_symbol *sym)
	365	{
	366	switch (sym->def)
	367	{
	368	case LDPK_DEF:
	369	case LDPK_COMMON:
	370	case LDPK_UNDEF:
	371	return BSF_GLOBAL;
	372
	373	case LDPK_WEAKUNDEF:
	374	case LDPK_WEAKDEF:
	375	return BSF_GLOBAL \| BSF_WEAK;
	376
	377	default:
	378	BFD_ASSERT (0);
	379	return 0;
	380	}
	381	}
	382
	383	static long
	384	bfd_plugin_canonicalize_symtab (bfd *abfd,
	385	asymbol **alocation)
	386	{
	387	struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
	388	long nsyms = plugin_data->nsyms;
	389	const struct ld_plugin_symbol *syms = plugin_data->syms;
	390	static asection fake_section;
	391	static asection fake_common_section;
	392	int i;
	393
	394	fake_section.name = ".text";
	395	fake_common_section.flags = SEC_IS_COMMON;
	396
	397	for (i = 0; i < nsyms; i++)
	398	{
	399	asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
	400
	401	BFD_ASSERT (s);
	402	alocation[i] = s;
	403
	404	s->the_bfd = abfd;
	405	s->name = syms[i].name;
	406	s->value = 0;
	407	s->flags = convert_flags (&syms[i]);
	408	switch (syms[i].def)
	409	{
	410	case LDPK_COMMON:
411	s->section = &fake_common_section;
412	break;
413	case LDPK_UNDEF:
414	case LDPK_WEAKUNDEF:
415	s->section = bfd_und_section_ptr;
416	break;
417	case LDPK_DEF:
418	case LDPK_WEAKDEF:
419	s->section = &fake_section;
420	break;
421	default:
422	BFD_ASSERT (0);
423	}
424
425	s->udata.p = (void *) &syms[i];
426	}
427
428	return nsyms;
429	}
430
431	static void
432	bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
433	PTR afile ATTRIBUTE_UNUSED,
434	asymbol *symbol ATTRIBUTE_UNUSED,
435	bfd_print_symbol_type how ATTRIBUTE_UNUSED)
436	{
437	BFD_ASSERT (0);
438	}
439
440	static void
441	bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
442	asymbol *symbol,
443	symbol_info *ret)
444	{
445	bfd_symbol_info (symbol, ret);
446	}
447
448	/* Make an empty symbol. */
449
450	static asymbol *
451	bfd_plugin_make_empty_symbol (bfd *abfd)
452	{
d3ce72d0 NC	453	asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
	454	if (new_symbol == NULL)
	455	return new_symbol;
	456	new_symbol->the_bfd = abfd;
	457	return new_symbol;
ce3c775b NC	458	}
	459
	460	static int
	461	bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
	462	struct bfd_link_info *info ATTRIBUTE_UNUSED)
	463	{
	464	BFD_ASSERT (0);
	465	return 0;
	466	}
	467
ce3c775b NC	468	const bfd_target plugin_vec =
	469	{
	470	"plugin", /* Name. */
	471	bfd_target_unknown_flavour,
	472	BFD_ENDIAN_LITTLE, /* Target byte order. */
	473	BFD_ENDIAN_LITTLE, /* Target headers byte order. */
	474	(HAS_RELOC \| EXEC_P \| /* Object flags. */
	475	HAS_LINENO \| HAS_DEBUG \|
	476	HAS_SYMS \| HAS_LOCALS \| DYNAMIC \| WP_TEXT \| D_PAGED),
	477	(SEC_CODE \| SEC_DATA \| SEC_ROM \| SEC_HAS_CONTENTS
	478	\| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* Section flags. */
	479	0, /* symbol_leading_char. */
	480	'/', /* ar_pad_char. */
	481	15, /* ar_max_namelen. */
0aabe54e	482	0, /* match priority. */
ce3c775b NC	483
	484	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	485	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	486	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
	487	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	488	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	489	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
	490
	491	{ /* bfd_check_format. */
	492	_bfd_dummy_target,
	493	bfd_plugin_object_p,
	494	bfd_generic_archive_p,
	495	_bfd_dummy_target
	496	},
	497	{ /* bfd_set_format. */
	498	bfd_false,
4846b70a	499	bfd_false,
ce3c775b NC	500	_bfd_generic_mkarchive,
	501	bfd_false,
	502	},
	503	{ /* bfd_write_contents. */
	504	bfd_false,
	505	bfd_false,
	506	_bfd_write_archive_contents,
	507	bfd_false,
	508	},
	509
	510	BFD_JUMP_TABLE_GENERIC (bfd_plugin),
	511	BFD_JUMP_TABLE_COPY (bfd_plugin),
	512	BFD_JUMP_TABLE_CORE (bfd_plugin),
	513	BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
	514	BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
	515	BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
	516	BFD_JUMP_TABLE_WRITE (bfd_plugin),
	517	BFD_JUMP_TABLE_LINK (bfd_plugin),
	518	BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
	519
	520	NULL,
	521
	522	NULL /* backend_data. */
	523	};
98950613	524	#endif /* BFD_SUPPORTS_PLUGIN */