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

/* Plugin support for BFD.
   Copyright (C) 2009-2014 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_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_line                          _bfd_nosymbols_find_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_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_claim (bfd *abfd)
{
  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;
    }

  if (!iobfd->iostream && !bfd_open_file (iobfd))
    return 0;

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

  if (!abfd->my_archive)
    {
      struct stat stat_buf;
      if (fstat (file.fd, &stat_buf))
        return 0;
      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 0;

  return 1;
}

static int
try_load_plugin (const char *pname, bfd *abfd)
{
  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;

  if (!try_claim (abfd))
    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 (bfd *abfd)
{
  char *plugin_dir;
  char *p;
  DIR *d;
  struct dirent *ent;
  int found = 0;

  if (plugin_name)
    return try_load_plugin (plugin_name, abfd);

  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, abfd);
      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)
{
  if (!load_plugin (abfd))
    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.
4b95cf5c	2	Copyright (C) 2009-2014 Free Software Foundation, Inc.
ce3c775b NC	3
	4	This file is part of BFD, the Binary File Descriptor library.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 3 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
	19	MA 02110-1301, USA. */
	20
691bf19c	21	#include "sysdep.h"
98950613 AM	22	#include "bfd.h"
	23
	24	#if BFD_SUPPORTS_PLUGINS
	25
ce3c775b	26	#include <assert.h>
17d5dae2	27	#ifdef HAVE_DLFCN_H
ce3c775b	28	#include <dlfcn.h>
17d5dae2 KT	29	#elif defined (HAVE_WINDOWS_H)
	30	#include <windows.h>
	31	#else
	32	#error Unknown how to handle dynamic-load-libraries.
	33	#endif
ce3c775b NC	34	#include <stdarg.h>
ce3c775b NC	35	#include "plugin-api.h"
ce3c775b NC	36	#include "plugin.h"
	37	#include "libbfd.h"
	38	#include "libiberty.h"
	39	#include <dirent.h>
	40
17d5dae2 KT	41	#if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
	42
	43	#define RTLD_NOW 0 /* Dummy value. */
	44
	45	static void *
	46	dlopen (const char *file, int mode ATTRIBUTE_UNUSED)
	47	{
	48	return LoadLibrary (file);
	49	}
	50
	51	static void *
	52	dlsym (void handle, const char name)
	53	{
	54	return GetProcAddress (handle, name);
	55	}
	56
	57	static int ATTRIBUTE_UNUSED
	58	dlclose (void *handle)
	59	{
	60	FreeLibrary (handle);
	61	return 0;
	62	}
	63
	64	static const char *
	65	dlerror (void)
	66	{
	67	return "Unable to load DLL.";
	68	}
	69
	70	#endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
	71
ce3c775b NC	72	#define bfd_plugin_close_and_cleanup _bfd_generic_close_and_cleanup
	73	#define bfd_plugin_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
	74	#define bfd_plugin_new_section_hook _bfd_generic_new_section_hook
	75	#define bfd_plugin_get_section_contents _bfd_generic_get_section_contents
	76	#define bfd_plugin_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
	77	#define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
	78	#define bfd_plugin_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
	79	#define bfd_plugin_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
	80	#define bfd_plugin_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
	81	#define bfd_plugin_core_file_matches_executable_p generic_core_file_matches_executable_p
	82	#define bfd_plugin_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
	83	#define bfd_plugin_bfd_is_target_special_symbol ((bfd_boolean () (bfd , asymbol *)) bfd_false)
	84	#define bfd_plugin_get_lineno _bfd_nosymbols_get_lineno
	85	#define bfd_plugin_find_nearest_line _bfd_nosymbols_find_nearest_line
9c461f7d	86	#define bfd_plugin_find_line _bfd_nosymbols_find_line
ce3c775b NC	87	#define bfd_plugin_find_inliner_info _bfd_nosymbols_find_inliner_info
	88	#define bfd_plugin_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
	89	#define bfd_plugin_read_minisymbols _bfd_generic_read_minisymbols
	90	#define bfd_plugin_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
	91	#define bfd_plugin_set_arch_mach bfd_default_set_arch_mach
	92	#define bfd_plugin_set_section_contents _bfd_generic_set_section_contents
	93	#define bfd_plugin_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
	94	#define bfd_plugin_bfd_relax_section bfd_generic_relax_section
	95	#define bfd_plugin_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
ce3c775b NC	96	#define bfd_plugin_bfd_link_add_symbols _bfd_generic_link_add_symbols
	97	#define bfd_plugin_bfd_link_just_syms _bfd_generic_link_just_syms
	98	#define bfd_plugin_bfd_final_link _bfd_generic_final_link
	99	#define bfd_plugin_bfd_link_split_section _bfd_generic_link_split_section
	100	#define bfd_plugin_bfd_gc_sections bfd_generic_gc_sections
ae17ab41	101	#define bfd_plugin_bfd_lookup_section_flags bfd_generic_lookup_section_flags
ce3c775b NC	102	#define bfd_plugin_bfd_merge_sections bfd_generic_merge_sections
	103	#define bfd_plugin_bfd_is_group_section bfd_generic_is_group_section
	104	#define bfd_plugin_bfd_discard_group bfd_generic_discard_group
	105	#define bfd_plugin_section_already_linked _bfd_generic_section_already_linked
	106	#define bfd_plugin_bfd_define_common_symbol bfd_generic_define_common_symbol
69a630b5	107	#define bfd_plugin_bfd_copy_link_hash_symbol_type _bfd_generic_copy_link_hash_symbol_type
ce3c775b NC	108
	109	static enum ld_plugin_status
	110	message (int level ATTRIBUTE_UNUSED,
	111	const char * format, ...)
	112	{
	113	va_list args;
	114	va_start (args, format);
	115	printf ("bfd plugin: ");
	116	vprintf (format, args);
d9b21463	117	putchar ('\n');
ce3c775b NC	118	va_end (args);
	119	return LDPS_OK;
	120	}
	121
	122	/* Register a claim-file handler. */
	123	static ld_plugin_claim_file_handler claim_file;
	124
	125	static enum ld_plugin_status
	126	register_claim_file (ld_plugin_claim_file_handler handler)
	127	{
	128	claim_file = handler;
	129	return LDPS_OK;
	130	}
	131
	132	static enum ld_plugin_status
	133	add_symbols (void * handle,
	134	int nsyms,
	135	const struct ld_plugin_symbol * syms)
	136	{
	137	bfd *abfd = handle;
	138	struct plugin_data_struct *plugin_data =
5bb3703f	139	bfd_alloc (abfd, sizeof (plugin_data_struct));
ce3c775b NC	140
	141	plugin_data->nsyms = nsyms;
	142	plugin_data->syms = syms;
	143
	144	if (nsyms != 0)
	145	abfd->flags \|= HAS_SYMS;
	146
	147	abfd->tdata.plugin_data = plugin_data;
	148	return LDPS_OK;
	149	}
	150
fc579192 NC	151	static const char *plugin_program_name;
	152
	153	void
	154	bfd_plugin_set_program_name (const char *program_name)
	155	{
	156	plugin_program_name = program_name;
	157	}
ce3c775b NC	158
ce3c775b NC	159	static int
e44f5bef	160	try_claim (bfd *abfd)
ce3c775b	161	{
e44f5bef MT	162	int claimed = 0;
	163	struct ld_plugin_input_file file;
	164	bfd *iobfd;
	165
	166	file.name = abfd->filename;
	167
	168	if (abfd->my_archive)
	169	{
	170	iobfd = abfd->my_archive;
	171	file.offset = abfd->origin;
	172	file.filesize = arelt_size (abfd);
	173	}
	174	else
	175	{
	176	iobfd = abfd;
	177	file.offset = 0;
	178	file.filesize = 0;
	179	}
	180
	181	if (!iobfd->iostream && !bfd_open_file (iobfd))
	182	return 0;
	183
	184	file.fd = fileno ((FILE *) iobfd->iostream);
	185
	186	if (!abfd->my_archive)
	187	{
	188	struct stat stat_buf;
	189	if (fstat (file.fd, &stat_buf))
	190	return 0;
	191	file.filesize = stat_buf.st_size;
	192	}
	193
	194	file.handle = abfd;
	195	off_t cur_offset = lseek(file.fd, 0, SEEK_CUR);
	196	claim_file (&file, &claimed);
	197	lseek(file.fd, cur_offset, SEEK_SET);
	198	if (!claimed)
	199	return 0;
	200
	201	return 1;
	202	}
	203
	204	static int
	205	try_load_plugin (const char pname, bfd abfd)
	206	{
	207	void *plugin_handle;
ce3c775b NC	208	int tv_size = 4;
	209	struct ld_plugin_tv tv[tv_size];
	210	int i;
	211	ld_plugin_onload onload;
	212	enum ld_plugin_status status;
	213
	214	plugin_handle = dlopen (pname, RTLD_NOW);
	215	if (!plugin_handle)
	216	{
	217	(*_bfd_error_handler)("%s\n", dlerror ());
	218	return 0;
	219	}
	220
	221	onload = dlsym (plugin_handle, "onload");
	222	if (!onload)
	223	goto err;
	224
	225	i = 0;
	226	tv[i].tv_tag = LDPT_MESSAGE;
	227	tv[i].tv_u.tv_message = message;
	228
	229	++i;
	230	tv[i].tv_tag = LDPT_REGISTER_CLAIM_FILE_HOOK;
	231	tv[i].tv_u.tv_register_claim_file = register_claim_file;
	232
	233	++i;
	234	tv[i].tv_tag = LDPT_ADD_SYMBOLS;
	235	tv[i].tv_u.tv_add_symbols = add_symbols;
	236
	237	++i;
	238	tv[i].tv_tag = LDPT_NULL;
	239	tv[i].tv_u.tv_val = 0;
	240
	241	status = (*onload)(tv);
	242
	243	if (status != LDPS_OK)
	244	goto err;
	245
	246	if (!claim_file)
	247	goto err;
	248
e44f5bef MT	249	if (!try_claim (abfd))
	250	goto err;
	251
ce3c775b NC	252	return 1;
	253
	254	err:
	255	plugin_handle = NULL;
	256	return 0;
	257	}
	258
	259	static const char *plugin_name;
	260
	261	void
	262	bfd_plugin_set_plugin (const char *p)
	263	{
	264	plugin_name = p;
	265	}
	266
	267	static int
e44f5bef	268	load_plugin (bfd *abfd)
ce3c775b NC	269	{
	270	char *plugin_dir;
	271	char *p;
	272	DIR *d;
	273	struct dirent *ent;
	274	int found = 0;
	275
	276	if (plugin_name)
e44f5bef	277	return try_load_plugin (plugin_name, abfd);
ce3c775b	278
fc579192	279	if (plugin_program_name == NULL)
ce3c775b NC	280	return 0;
	281
	282	plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
fc579192	283	p = make_relative_prefix (plugin_program_name,
ce3c775b NC	284	BINDIR,
	285	plugin_dir);
	286	free (plugin_dir);
	287	plugin_dir = NULL;
	288
	289	d = opendir (p);
	290	if (!d)
	291	goto out;
	292
	293	while ((ent = readdir (d)))
	294	{
	295	char *full_name;
c41ba836	296	struct stat s;
ce3c775b NC	297
ce3c775b NC	298	full_name = concat (p, "/", ent->d_name, NULL);
c41ba836	299	if (stat(full_name, &s) == 0 && S_ISREG (s.st_mode))
e44f5bef	300	found = try_load_plugin (full_name, abfd);
ce3c775b NC	301	free (full_name);
	302	if (found)
	303	break;
	304	}
	305
	306	out:
	307	free (p);
	308	if (d)
	309	closedir (d);
	310
	311	return found;
	312	}
	313
	314
	315	static const bfd_target *
	316	bfd_plugin_object_p (bfd *abfd)
	317	{
e44f5bef	318	if (!load_plugin (abfd))
ce3c775b NC	319	return NULL;
	320
	321	return abfd->xvec;
	322	}
	323
	324	/* Copy any private info we understand from the input bfd
	325	to the output bfd. */
	326
	327	static bfd_boolean
	328	bfd_plugin_bfd_copy_private_bfd_data (bfd *ibfd ATTRIBUTE_UNUSED,
	329	bfd *obfd ATTRIBUTE_UNUSED)
	330	{
	331	BFD_ASSERT (0);
	332	return TRUE;
	333	}
	334
	335	/* Copy any private info we understand from the input section
	336	to the output section. */
	337
	338	static bfd_boolean
	339	bfd_plugin_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED,
	340	asection *isection ATTRIBUTE_UNUSED,
	341	bfd *obfd ATTRIBUTE_UNUSED,
	342	asection *osection ATTRIBUTE_UNUSED)
	343	{
	344	BFD_ASSERT (0);
	345	return TRUE;
	346	}
	347
	348	/* Copy any private info we understand from the input symbol
	349	to the output symbol. */
	350
	351	static bfd_boolean
	352	bfd_plugin_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
	353	asymbol *isymbol ATTRIBUTE_UNUSED,
	354	bfd *obfd ATTRIBUTE_UNUSED,
	355	asymbol *osymbol ATTRIBUTE_UNUSED)
	356	{
	357	BFD_ASSERT (0);
	358	return TRUE;
	359	}
	360
	361	static bfd_boolean
	362	bfd_plugin_bfd_print_private_bfd_data (bfd *abfd ATTRIBUTE_UNUSED, PTR ptr ATTRIBUTE_UNUSED)
	363	{
	364	BFD_ASSERT (0);
	365	return TRUE;
	366	}
	367
	368	static char *
	369	bfd_plugin_core_file_failing_command (bfd *abfd ATTRIBUTE_UNUSED)
	370	{
	371	BFD_ASSERT (0);
	372	return NULL;
	373	}
	374
	375	static int
	376	bfd_plugin_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
261b8d08 PA	377	{
	378	BFD_ASSERT (0);
	379	return 0;
	380	}
	381
	382	static int
	383	bfd_plugin_core_file_pid (bfd *abfd ATTRIBUTE_UNUSED)
ce3c775b NC	384	{
	385	BFD_ASSERT (0);
	386	return 0;
	387	}
	388
	389	static long
	390	bfd_plugin_get_symtab_upper_bound (bfd *abfd)
	391	{
	392	struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
	393	long nsyms = plugin_data->nsyms;
	394
	395	BFD_ASSERT (nsyms >= 0);
	396
	397	return ((nsyms + 1) * sizeof (asymbol *));
	398	}
	399
	400	static flagword
	401	convert_flags (const struct ld_plugin_symbol *sym)
	402	{
	403	switch (sym->def)
68ffbac6	404	{
ce3c775b NC	405	case LDPK_DEF:
	406	case LDPK_COMMON:
	407	case LDPK_UNDEF:
	408	return BSF_GLOBAL;
	409
	410	case LDPK_WEAKUNDEF:
	411	case LDPK_WEAKDEF:
	412	return BSF_GLOBAL \| BSF_WEAK;
	413
	414	default:
	415	BFD_ASSERT (0);
	416	return 0;
	417	}
	418	}
	419
	420	static long
	421	bfd_plugin_canonicalize_symtab (bfd *abfd,
	422	asymbol **alocation)
	423	{
	424	struct plugin_data_struct *plugin_data = abfd->tdata.plugin_data;
	425	long nsyms = plugin_data->nsyms;
	426	const struct ld_plugin_symbol *syms = plugin_data->syms;
	427	static asection fake_section;
	428	static asection fake_common_section;
	429	int i;
	430
	431	fake_section.name = ".text";
	432	fake_common_section.flags = SEC_IS_COMMON;
	433
	434	for (i = 0; i < nsyms; i++)
	435	{
68ffbac6	436	asymbol *s = bfd_alloc (abfd, sizeof (asymbol));
ce3c775b NC	437
	438	BFD_ASSERT (s);
	439	alocation[i] = s;
	440
	441	s->the_bfd = abfd;
	442	s->name = syms[i].name;
	443	s->value = 0;
	444	s->flags = convert_flags (&syms[i]);
	445	switch (syms[i].def)
	446	{
	447	case LDPK_COMMON:
	448	s->section = &fake_common_section;
	449	break;
	450	case LDPK_UNDEF:
	451	case LDPK_WEAKUNDEF:
	452	s->section = bfd_und_section_ptr;
	453	break;
	454	case LDPK_DEF:
	455	case LDPK_WEAKDEF:
	456	s->section = &fake_section;
	457	break;
	458	default:
	459	BFD_ASSERT (0);
	460	}
	461
	462	s->udata.p = (void *) &syms[i];
	463	}
	464
	465	return nsyms;
	466	}
	467
	468	static void
	469	bfd_plugin_print_symbol (bfd *abfd ATTRIBUTE_UNUSED,
	470	PTR afile ATTRIBUTE_UNUSED,
	471	asymbol *symbol ATTRIBUTE_UNUSED,
	472	bfd_print_symbol_type how ATTRIBUTE_UNUSED)
	473	{
	474	BFD_ASSERT (0);
	475	}
	476
	477	static void
	478	bfd_plugin_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED,
	479	asymbol *symbol,
	480	symbol_info *ret)
	481	{
	482	bfd_symbol_info (symbol, ret);
	483	}
	484
	485	/* Make an empty symbol. */
	486
	487	static asymbol *
	488	bfd_plugin_make_empty_symbol (bfd *abfd)
	489	{
d3ce72d0 NC	490	asymbol *new_symbol = bfd_zalloc (abfd, sizeof (asymbol));
	491	if (new_symbol == NULL)
	492	return new_symbol;
	493	new_symbol->the_bfd = abfd;
	494	return new_symbol;
ce3c775b NC	495	}
	496
	497	static int
	498	bfd_plugin_sizeof_headers (bfd *a ATTRIBUTE_UNUSED,
	499	struct bfd_link_info *info ATTRIBUTE_UNUSED)
	500	{
	501	BFD_ASSERT (0);
	502	return 0;
	503	}
	504
ce3c775b NC	505	const bfd_target plugin_vec =
	506	{
	507	"plugin", /* Name. */
	508	bfd_target_unknown_flavour,
	509	BFD_ENDIAN_LITTLE, /* Target byte order. */
	510	BFD_ENDIAN_LITTLE, /* Target headers byte order. */
	511	(HAS_RELOC \| EXEC_P \| /* Object flags. */
	512	HAS_LINENO \| HAS_DEBUG \|
	513	HAS_SYMS \| HAS_LOCALS \| DYNAMIC \| WP_TEXT \| D_PAGED),
	514	(SEC_CODE \| SEC_DATA \| SEC_ROM \| SEC_HAS_CONTENTS
	515	\| SEC_ALLOC \| SEC_LOAD \| SEC_RELOC), /* Section flags. */
	516	0, /* symbol_leading_char. */
	517	'/', /* ar_pad_char. */
	518	15, /* ar_max_namelen. */
0aabe54e	519	0, /* match priority. */
ce3c775b NC	520
	521	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	522	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	523	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
	524	bfd_getl64, bfd_getl_signed_64, bfd_putl64,
	525	bfd_getl32, bfd_getl_signed_32, bfd_putl32,
	526	bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
	527
	528	{ /* bfd_check_format. */
	529	_bfd_dummy_target,
	530	bfd_plugin_object_p,
	531	bfd_generic_archive_p,
	532	_bfd_dummy_target
	533	},
	534	{ /* bfd_set_format. */
	535	bfd_false,
4846b70a	536	bfd_false,
ce3c775b NC	537	_bfd_generic_mkarchive,
	538	bfd_false,
	539	},
	540	{ /* bfd_write_contents. */
	541	bfd_false,
	542	bfd_false,
	543	_bfd_write_archive_contents,
	544	bfd_false,
	545	},
	546
	547	BFD_JUMP_TABLE_GENERIC (bfd_plugin),
	548	BFD_JUMP_TABLE_COPY (bfd_plugin),
	549	BFD_JUMP_TABLE_CORE (bfd_plugin),
	550	BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
	551	BFD_JUMP_TABLE_SYMBOLS (bfd_plugin),
	552	BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
	553	BFD_JUMP_TABLE_WRITE (bfd_plugin),
	554	BFD_JUMP_TABLE_LINK (bfd_plugin),
	555	BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
	556
	557	NULL,
	558
	559	NULL /* backend_data. */
	560	};
98950613	561	#endif /* BFD_SUPPORTS_PLUGIN */