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

diff --git a/bfd/plugin.c b/bfd/plugin.c
index 064e2731282fc43f2698a098614af937d8f6db50..3931d2750b1ec93a84ebadd0f70e4d11a6ba882b 100644 (file)
--- a/bfd/plugin.c
+++ b/bfd/plugin.c
@@ -1,6 +1,5 @@
 /* Plugin support for BFD.
 /* Plugin support for BFD.

-   Copyright 2009, 2010, 2011
-   Free Software Foundation, Inc.
+   Copyright (C) 2009-2016 Free Software Foundation, Inc.

 
    This file is part of BFD, the Binary File Descriptor library.
 
 
    This file is part of BFD, the Binary File Descriptor library.
 


@@ -19,21 +18,57 @@
    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
    MA 02110-1301, USA.  */
 
    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
    MA 02110-1301, USA.  */
 

-#include "config.h"
+#include "sysdep.h"

 #include "bfd.h"
 
 #if BFD_SUPPORTS_PLUGINS
 
 #include <assert.h>
 #include "bfd.h"
 
 #if BFD_SUPPORTS_PLUGINS
 
 #include <assert.h>

+#ifdef HAVE_DLFCN_H

 #include <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 <stdarg.h>
 #include "plugin-api.h"

-#include "sysdep.h"

 #include "plugin.h"
 #include "libbfd.h"
 #include "libiberty.h"
 #include <dirent.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_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


@@ -48,7 +83,9 @@
 #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_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_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_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


@@ -57,7 +94,6 @@
 #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_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_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


@@ -70,6 +106,7 @@
 #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
 #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

+#define bfd_plugin_bfd_link_check_relocs              _bfd_generic_link_check_relocs

 
 static enum ld_plugin_status
 message (int level ATTRIBUTE_UNUSED,
 
 static enum ld_plugin_status
 message (int level ATTRIBUTE_UNUSED,


@@ -101,7 +138,7 @@ add_symbols (void * handle,
 {
   bfd *abfd = handle;
   struct plugin_data_struct *plugin_data =
 {
   bfd *abfd = handle;
   struct plugin_data_struct *plugin_data =

-    bfd_alloc (abfd, sizeof (plugin_data_struct));;
+    bfd_alloc (abfd, sizeof (plugin_data_struct));

 
   plugin_data->nsyms = nsyms;
   plugin_data->syms = syms;
 
   plugin_data->nsyms = nsyms;
   plugin_data->syms = syms;


@@ -121,16 +158,63 @@ bfd_plugin_set_program_name (const char *program_name)
   plugin_program_name = program_name;
 }
 
   plugin_program_name = program_name;
 }
 

+int
+bfd_plugin_open_input (bfd *ibfd, struct ld_plugin_input_file *file)
+{
+  bfd *iobfd;
+
+  iobfd = ibfd;
+  if (ibfd->my_archive && !bfd_is_thin_archive (ibfd->my_archive))
+    iobfd = ibfd->my_archive;
+  file->name = iobfd->filename;
+
+  if (!iobfd->iostream && !bfd_open_file (iobfd))
+    return 0;
+
+  file->fd = fileno ((FILE *) iobfd->iostream);
+
+  if (iobfd == ibfd)
+    {
+      struct stat stat_buf;
+      if (fstat (file->fd, &stat_buf))
+        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;
+
+  if (!bfd_plugin_open_input (abfd, &file))
+    return 0;
+  file.handle = abfd;
+  off_t cur_offset = lseek (file.fd, 0, SEEK_CUR);
+  claim_file (&file, &claimed);
+  lseek (file.fd, cur_offset, SEEK_SET);
+  return claimed;
+}
+

 static int
 static int

-try_load_plugin (const char *pname)
+try_load_plugin (const char *pname, bfd *abfd, int *has_plugin_p)

 {
 {

-  static void *plugin_handle;
-  int tv_size = 4;
-  struct ld_plugin_tv tv[tv_size];
+  void *plugin_handle;
+  struct ld_plugin_tv tv[4];

   int i;
   ld_plugin_onload onload;
   enum ld_plugin_status status;
 
   int i;
   ld_plugin_onload onload;
   enum ld_plugin_status status;
 

+  *has_plugin_p = 0;
+

   plugin_handle = dlopen (pname, RTLD_NOW);
   if (!plugin_handle)
     {
   plugin_handle = dlopen (pname, RTLD_NOW);
   if (!plugin_handle)
     {


@@ -163,26 +247,77 @@ try_load_plugin (const char *pname)
   if (status != LDPS_OK)
     goto err;
 
   if (status != LDPS_OK)
     goto err;
 

+  *has_plugin_p = 1;
+
+  abfd->plugin_format = bfd_plugin_no;
+

   if (!claim_file)
     goto err;
 
   if (!claim_file)
     goto err;
 

+  if (!try_claim (abfd))
+    goto err;
+
+  abfd->plugin_format = bfd_plugin_yes;
+

   return 1;
 
  err:
   return 1;
 
  err:

-  plugin_handle = NULL;

   return 0;
 }
 
   return 0;
 }
 

+/* There may be plugin libraries in lib/bfd-plugins.  */
+
+static int has_plugin = -1;
+
+static const bfd_target *(*ld_plugin_object_p) (bfd *);
+

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

+  has_plugin = p != NULL;
+}
+
+/* Return TRUE if a plugin library is used.  */
+
+bfd_boolean
+bfd_plugin_specified_p (void)
+{
+  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.  */
+
+bfd_boolean
+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 (const bfd_target *(*object_p) (bfd *))
+{
+  ld_plugin_object_p = object_p;

 }
 
 static int
 }
 
 static int

-load_plugin (void)
+load_plugin (bfd *abfd)

 {
   char *plugin_dir;
   char *p;
 {
   char *plugin_dir;
   char *p;


@@ -190,11 +325,14 @@ load_plugin (void)
   struct dirent *ent;
   int found = 0;
 
   struct dirent *ent;
   int found = 0;
 

+  if (!has_plugin)
+    return found;
+

   if (plugin_name)
   if (plugin_name)

-    return try_load_plugin (plugin_name);
+    return try_load_plugin (plugin_name, abfd, &has_plugin);

 
   if (plugin_program_name == NULL)
 
   if (plugin_program_name == NULL)

-    return 0;
+    return found;

 
   plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
   p = make_relative_prefix (plugin_program_name,
 
   plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
   p = make_relative_prefix (plugin_program_name,


@@ -211,10 +349,13 @@ load_plugin (void)
     {
       char *full_name;
       struct stat s;
     {
       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))
 
       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);
+       found = try_load_plugin (full_name, abfd, &valid_plugin);
+      if (has_plugin <= 0)
+       has_plugin = valid_plugin;

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


@@ -232,56 +373,13 @@ load_plugin (void)
 static const bfd_target *
 bfd_plugin_object_p (bfd *abfd)
 {
 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 (ld_plugin_object_p)
+    return ld_plugin_object_p (abfd);

 
 

-  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)
+  if (abfd->plugin_format == bfd_plugin_unknown && !load_plugin (abfd))

     return NULL;
 
     return NULL;
 

-  return abfd->xvec;
+  return abfd->plugin_format == bfd_plugin_yes ? abfd->xvec : NULL;

 }
 
 /* Copy any private info we understand from the input bfd
 }
 
 /* Copy any private info we understand from the input bfd


@@ -364,7 +462,7 @@ static flagword
 convert_flags (const struct ld_plugin_symbol *sym)
 {
  switch (sym->def)
 convert_flags (const struct ld_plugin_symbol *sym)
 {
  switch (sym->def)

-   { 
+   {

    case LDPK_DEF:
    case LDPK_COMMON:
    case LDPK_UNDEF:
    case LDPK_DEF:
    case LDPK_COMMON:
    case LDPK_UNDEF:


@@ -396,7 +494,7 @@ bfd_plugin_canonicalize_symtab (bfd *abfd,
 
   for (i = 0; i < nsyms; i++)
     {
 
   for (i = 0; i < nsyms; i++)
     {

-      asymbol *s = bfd_alloc (abfd, sizeof (asymbol)); 
+      asymbol *s = bfd_alloc (abfd, sizeof (asymbol));

 
       BFD_ASSERT (s);
       alocation[i] = s;
 
       BFD_ASSERT (s);
       alocation[i] = s;


@@ -479,7 +577,7 @@ const bfd_target plugin_vec =
   0,                           /* symbol_leading_char.  */
   '/',                         /* ar_pad_char.  */
   15,                          /* ar_max_namelen.  */
   0,                           /* symbol_leading_char.  */
   '/',                         /* ar_pad_char.  */
   15,                          /* ar_max_namelen.  */

-  0,                           /* match priority.  */
+  255,                         /* match priority.  */

 
   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
   bfd_getl32, bfd_getl_signed_32, bfd_putl32,
 
   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
   bfd_getl32, bfd_getl_signed_32, bfd_putl32,


@@ -510,7 +608,11 @@ const bfd_target plugin_vec =
   BFD_JUMP_TABLE_GENERIC (bfd_plugin),
   BFD_JUMP_TABLE_COPY (bfd_plugin),
   BFD_JUMP_TABLE_CORE (bfd_plugin),
   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),
   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_SYMBOLS (bfd_plugin),
   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
   BFD_JUMP_TABLE_WRITE (bfd_plugin),