1 // plugin.cc -- plugin manager for gold -*- C++ -*-
3 // Copyright (C) 2008-2016 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of gold.
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
34 #elif defined (HAVE_WINDOWS_H)
37 #error Unknown how to handle dynamic-load-libraries.
40 #if !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H)
42 #define RTLD_NOW 0 /* Dummy value. */
44 dlopen(const char *file
, int mode ATTRIBUTE_UNUSED
)
46 return LoadLibrary(file
);
50 dlsym(void *handle
, const char *name
)
52 return reinterpret_cast<void *>(
53 GetProcAddress(static_cast<HMODULE
>(handle
),name
));
59 return "unable to load dll";
62 #endif /* !defined (HAVE_DLFCN_H) && defined (HAVE_WINDOWS_H) */
63 #endif /* ENABLE_PLUGINS */
65 #include "parameters.h"
74 #include "descriptors.h"
82 // The linker's exported interfaces.
87 static enum ld_plugin_status
88 register_claim_file(ld_plugin_claim_file_handler handler
);
90 static enum ld_plugin_status
91 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler
);
93 static enum ld_plugin_status
94 register_cleanup(ld_plugin_cleanup_handler handler
);
96 static enum ld_plugin_status
97 add_symbols(void *handle
, int nsyms
, const struct ld_plugin_symbol
*syms
);
99 static enum ld_plugin_status
100 get_input_file(const void *handle
, struct ld_plugin_input_file
*file
);
102 static enum ld_plugin_status
103 get_view(const void *handle
, const void **viewp
);
105 static enum ld_plugin_status
106 release_input_file(const void *handle
);
108 static enum ld_plugin_status
109 get_symbols(const void *handle
, int nsyms
, struct ld_plugin_symbol
*syms
);
111 static enum ld_plugin_status
112 get_symbols_v2(const void *handle
, int nsyms
, struct ld_plugin_symbol
*syms
);
114 static enum ld_plugin_status
115 add_input_file(const char *pathname
);
117 static enum ld_plugin_status
118 add_input_library(const char *pathname
);
120 static enum ld_plugin_status
121 set_extra_library_path(const char *path
);
123 static enum ld_plugin_status
124 message(int level
, const char *format
, ...);
126 static enum ld_plugin_status
127 get_input_section_count(const void* handle
, unsigned int* count
);
129 static enum ld_plugin_status
130 get_input_section_type(const struct ld_plugin_section section
,
133 static enum ld_plugin_status
134 get_input_section_name(const struct ld_plugin_section section
,
135 char** section_name_ptr
);
137 static enum ld_plugin_status
138 get_input_section_contents(const struct ld_plugin_section section
,
139 const unsigned char** section_contents
,
142 static enum ld_plugin_status
143 update_section_order(const struct ld_plugin_section
*section_list
,
144 unsigned int num_sections
);
146 static enum ld_plugin_status
147 allow_section_ordering();
149 static enum ld_plugin_status
150 allow_unique_segment_for_sections();
152 static enum ld_plugin_status
153 unique_segment_for_sections(const char* segment_name
,
156 const struct ld_plugin_section
*section_list
,
157 unsigned int num_sections
);
160 #endif // ENABLE_PLUGINS
162 static Pluginobj
* make_sized_plugin_object(Input_file
* input_file
,
163 off_t offset
, off_t filesize
);
167 // Load one plugin library.
172 #ifdef ENABLE_PLUGINS
173 // Load the plugin library.
174 // FIXME: Look for the library in standard locations.
175 this->handle_
= dlopen(this->filename_
.c_str(), RTLD_NOW
);
176 if (this->handle_
== NULL
)
178 gold_error(_("%s: could not load plugin library: %s"),
179 this->filename_
.c_str(), dlerror());
183 // Find the plugin's onload entry point.
184 void* ptr
= dlsym(this->handle_
, "onload");
187 gold_error(_("%s: could not find onload entry point"),
188 this->filename_
.c_str());
191 ld_plugin_onload onload
;
192 gold_assert(sizeof(onload
) == sizeof(ptr
));
193 memcpy(&onload
, &ptr
, sizeof(ptr
));
195 // Get the linker's version number.
196 const char* ver
= get_version_string();
199 sscanf(ver
, "%d.%d", &major
, &minor
);
201 // Allocate and populate a transfer vector.
202 const int tv_fixed_size
= 26;
204 int tv_size
= this->args_
.size() + tv_fixed_size
;
205 ld_plugin_tv
* tv
= new ld_plugin_tv
[tv_size
];
207 // Put LDPT_MESSAGE at the front of the list so the plugin can use it
208 // while processing subsequent entries.
210 tv
[i
].tv_tag
= LDPT_MESSAGE
;
211 tv
[i
].tv_u
.tv_message
= message
;
214 tv
[i
].tv_tag
= LDPT_API_VERSION
;
215 tv
[i
].tv_u
.tv_val
= LD_PLUGIN_API_VERSION
;
218 tv
[i
].tv_tag
= LDPT_GOLD_VERSION
;
219 tv
[i
].tv_u
.tv_val
= major
* 100 + minor
;
222 tv
[i
].tv_tag
= LDPT_LINKER_OUTPUT
;
223 if (parameters
->options().relocatable())
224 tv
[i
].tv_u
.tv_val
= LDPO_REL
;
225 else if (parameters
->options().shared())
226 tv
[i
].tv_u
.tv_val
= LDPO_DYN
;
227 else if (parameters
->options().pie())
228 tv
[i
].tv_u
.tv_val
= LDPO_PIE
;
230 tv
[i
].tv_u
.tv_val
= LDPO_EXEC
;
233 tv
[i
].tv_tag
= LDPT_OUTPUT_NAME
;
234 tv
[i
].tv_u
.tv_string
= parameters
->options().output();
236 for (unsigned int j
= 0; j
< this->args_
.size(); ++j
)
239 tv
[i
].tv_tag
= LDPT_OPTION
;
240 tv
[i
].tv_u
.tv_string
= this->args_
[j
].c_str();
244 tv
[i
].tv_tag
= LDPT_REGISTER_CLAIM_FILE_HOOK
;
245 tv
[i
].tv_u
.tv_register_claim_file
= register_claim_file
;
248 tv
[i
].tv_tag
= LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK
;
249 tv
[i
].tv_u
.tv_register_all_symbols_read
= register_all_symbols_read
;
252 tv
[i
].tv_tag
= LDPT_REGISTER_CLEANUP_HOOK
;
253 tv
[i
].tv_u
.tv_register_cleanup
= register_cleanup
;
256 tv
[i
].tv_tag
= LDPT_ADD_SYMBOLS
;
257 tv
[i
].tv_u
.tv_add_symbols
= add_symbols
;
260 tv
[i
].tv_tag
= LDPT_GET_INPUT_FILE
;
261 tv
[i
].tv_u
.tv_get_input_file
= get_input_file
;
264 tv
[i
].tv_tag
= LDPT_GET_VIEW
;
265 tv
[i
].tv_u
.tv_get_view
= get_view
;
268 tv
[i
].tv_tag
= LDPT_RELEASE_INPUT_FILE
;
269 tv
[i
].tv_u
.tv_release_input_file
= release_input_file
;
272 tv
[i
].tv_tag
= LDPT_GET_SYMBOLS
;
273 tv
[i
].tv_u
.tv_get_symbols
= get_symbols
;
276 tv
[i
].tv_tag
= LDPT_GET_SYMBOLS_V2
;
277 tv
[i
].tv_u
.tv_get_symbols
= get_symbols_v2
;
280 tv
[i
].tv_tag
= LDPT_ADD_INPUT_FILE
;
281 tv
[i
].tv_u
.tv_add_input_file
= add_input_file
;
284 tv
[i
].tv_tag
= LDPT_ADD_INPUT_LIBRARY
;
285 tv
[i
].tv_u
.tv_add_input_library
= add_input_library
;
288 tv
[i
].tv_tag
= LDPT_SET_EXTRA_LIBRARY_PATH
;
289 tv
[i
].tv_u
.tv_set_extra_library_path
= set_extra_library_path
;
292 tv
[i
].tv_tag
= LDPT_GET_INPUT_SECTION_COUNT
;
293 tv
[i
].tv_u
.tv_get_input_section_count
= get_input_section_count
;
296 tv
[i
].tv_tag
= LDPT_GET_INPUT_SECTION_TYPE
;
297 tv
[i
].tv_u
.tv_get_input_section_type
= get_input_section_type
;
300 tv
[i
].tv_tag
= LDPT_GET_INPUT_SECTION_NAME
;
301 tv
[i
].tv_u
.tv_get_input_section_name
= get_input_section_name
;
304 tv
[i
].tv_tag
= LDPT_GET_INPUT_SECTION_CONTENTS
;
305 tv
[i
].tv_u
.tv_get_input_section_contents
= get_input_section_contents
;
308 tv
[i
].tv_tag
= LDPT_UPDATE_SECTION_ORDER
;
309 tv
[i
].tv_u
.tv_update_section_order
= update_section_order
;
312 tv
[i
].tv_tag
= LDPT_ALLOW_SECTION_ORDERING
;
313 tv
[i
].tv_u
.tv_allow_section_ordering
= allow_section_ordering
;
316 tv
[i
].tv_tag
= LDPT_ALLOW_UNIQUE_SEGMENT_FOR_SECTIONS
;
317 tv
[i
].tv_u
.tv_allow_unique_segment_for_sections
318 = allow_unique_segment_for_sections
;
321 tv
[i
].tv_tag
= LDPT_UNIQUE_SEGMENT_FOR_SECTIONS
;
322 tv
[i
].tv_u
.tv_unique_segment_for_sections
= unique_segment_for_sections
;
325 tv
[i
].tv_tag
= LDPT_NULL
;
326 tv
[i
].tv_u
.tv_val
= 0;
328 gold_assert(i
== tv_size
- 1);
330 // Call the onload entry point.
334 #endif // ENABLE_PLUGINS
337 // Call the plugin claim-file handler.
340 Plugin::claim_file(struct ld_plugin_input_file
* plugin_input_file
)
344 if (this->claim_file_handler_
!= NULL
)
346 (*this->claim_file_handler_
)(plugin_input_file
, &claimed
);
353 // Call the all-symbols-read handler.
356 Plugin::all_symbols_read()
358 if (this->all_symbols_read_handler_
!= NULL
)
359 (*this->all_symbols_read_handler_
)();
362 // Call the cleanup handler.
367 if (this->cleanup_handler_
!= NULL
&& !this->cleanup_done_
)
369 // Set this flag before calling to prevent a recursive plunge
370 // in the event that a plugin's cleanup handler issues a
372 this->cleanup_done_
= true;
373 (*this->cleanup_handler_
)();
377 // This task is used to rescan archives as needed.
379 class Plugin_rescan
: public Task
382 Plugin_rescan(Task_token
* this_blocker
, Task_token
* next_blocker
)
383 : this_blocker_(this_blocker
), next_blocker_(next_blocker
)
388 delete this->this_blocker_
;
394 if (this->this_blocker_
->is_blocked())
395 return this->this_blocker_
;
400 locks(Task_locker
* tl
)
401 { tl
->add(this, this->next_blocker_
); }
405 { parameters
->options().plugins()->rescan(this); }
409 { return "Plugin_rescan"; }
412 Task_token
* this_blocker_
;
413 Task_token
* next_blocker_
;
416 // Plugin_manager methods.
418 Plugin_manager::~Plugin_manager()
420 for (Plugin_list::iterator p
= this->plugins_
.begin();
421 p
!= this->plugins_
.end();
424 this->plugins_
.clear();
425 for (Object_list::iterator obj
= this->objects_
.begin();
426 obj
!= this->objects_
.end();
429 this->objects_
.clear();
433 // Load all plugin libraries.
436 Plugin_manager::load_plugins(Layout
* layout
)
438 this->layout_
= layout
;
439 for (this->current_
= this->plugins_
.begin();
440 this->current_
!= this->plugins_
.end();
442 (*this->current_
)->load();
445 // Call the plugin claim-file handlers in turn to see if any claim the file.
448 Plugin_manager::claim_file(Input_file
* input_file
, off_t offset
,
449 off_t filesize
, Object
* elf_object
)
451 bool lock_initialized
= this->initialize_lock_
.initialize();
453 gold_assert(lock_initialized
);
454 Hold_lock
hl(*this->lock_
);
455 if (this->in_replacement_phase_
)
458 unsigned int handle
= this->objects_
.size();
459 this->input_file_
= input_file
;
460 this->plugin_input_file_
.name
= input_file
->filename().c_str();
461 this->plugin_input_file_
.fd
= input_file
->file().descriptor();
462 this->plugin_input_file_
.offset
= offset
;
463 this->plugin_input_file_
.filesize
= filesize
;
464 this->plugin_input_file_
.handle
= reinterpret_cast<void*>(handle
);
465 if (elf_object
!= NULL
)
466 this->objects_
.push_back(elf_object
);
467 this->in_claim_file_handler_
= true;
469 for (this->current_
= this->plugins_
.begin();
470 this->current_
!= this->plugins_
.end();
473 if ((*this->current_
)->claim_file(&this->plugin_input_file_
))
475 this->any_claimed_
= true;
476 this->in_claim_file_handler_
= false;
478 if (this->objects_
.size() > handle
479 && this->objects_
[handle
]->pluginobj() != NULL
)
480 return this->objects_
[handle
]->pluginobj();
482 // If the plugin claimed the file but did not call the
483 // add_symbols callback, we need to create the Pluginobj now.
484 Pluginobj
* obj
= this->make_plugin_object(handle
);
489 this->in_claim_file_handler_
= false;
493 // Save an archive. This is used so that a plugin can add a file
494 // which refers to a symbol which was not previously referenced. In
495 // that case we want to pretend that the symbol was referenced before,
496 // and pull in the archive object.
499 Plugin_manager::save_archive(Archive
* archive
)
501 if (this->in_replacement_phase_
|| !this->any_claimed_
)
504 this->rescannable_
.push_back(Rescannable(archive
));
507 // Save an Input_group. This is like save_archive.
510 Plugin_manager::save_input_group(Input_group
* input_group
)
512 if (this->in_replacement_phase_
|| !this->any_claimed_
)
515 this->rescannable_
.push_back(Rescannable(input_group
));
518 // Call the all-symbols-read handlers.
521 Plugin_manager::all_symbols_read(Workqueue
* workqueue
, Task
* task
,
522 Input_objects
* input_objects
,
523 Symbol_table
* symtab
,
524 Dirsearch
* dirpath
, Mapfile
* mapfile
,
525 Task_token
** last_blocker
)
527 this->in_replacement_phase_
= true;
528 this->workqueue_
= workqueue
;
530 this->input_objects_
= input_objects
;
531 this->symtab_
= symtab
;
532 this->dirpath_
= dirpath
;
533 this->mapfile_
= mapfile
;
534 this->this_blocker_
= NULL
;
536 for (this->current_
= this->plugins_
.begin();
537 this->current_
!= this->plugins_
.end();
539 (*this->current_
)->all_symbols_read();
541 if (this->any_added_
)
543 Task_token
* next_blocker
= new Task_token(true);
544 next_blocker
->add_blocker();
545 workqueue
->queue(new Plugin_rescan(this->this_blocker_
, next_blocker
));
546 this->this_blocker_
= next_blocker
;
549 *last_blocker
= this->this_blocker_
;
552 // This is called when we see a new undefined symbol. If we are in
553 // the replacement phase, this means that we may need to rescan some
554 // archives we have previously seen.
557 Plugin_manager::new_undefined_symbol(Symbol
* sym
)
559 if (this->in_replacement_phase_
)
560 this->undefined_symbols_
.push_back(sym
);
563 // Rescan archives as needed. This handles the case where a new
564 // object file added by a plugin has an undefined reference to some
565 // symbol defined in an archive.
568 Plugin_manager::rescan(Task
* task
)
570 size_t rescan_pos
= 0;
571 size_t rescan_size
= this->rescannable_
.size();
572 while (!this->undefined_symbols_
.empty())
574 if (rescan_pos
>= rescan_size
)
576 this->undefined_symbols_
.clear();
580 Undefined_symbol_list undefs
;
581 undefs
.reserve(this->undefined_symbols_
.size());
582 this->undefined_symbols_
.swap(undefs
);
584 size_t min_rescan_pos
= rescan_size
;
586 for (Undefined_symbol_list::const_iterator p
= undefs
.begin();
590 if (!(*p
)->is_undefined())
593 this->undefined_symbols_
.push_back(*p
);
595 // Find the first rescan archive which defines this symbol,
596 // starting at the current rescan position. The rescan position
597 // exists so that given -la -lb -lc we don't look for undefined
598 // symbols in -lb back in -la, but instead get the definition
599 // from -lc. Don't bother to look past the current minimum
601 for (size_t i
= rescan_pos
; i
< min_rescan_pos
; ++i
)
603 if (this->rescannable_defines(i
, *p
))
611 if (min_rescan_pos
>= rescan_size
)
613 // We didn't find any rescannable archives which define any
614 // undefined symbols.
618 const Rescannable
& r(this->rescannable_
[min_rescan_pos
]);
621 Task_lock_obj
<Archive
> tl(task
, r
.u
.archive
);
622 r
.u
.archive
->add_symbols(this->symtab_
, this->layout_
,
623 this->input_objects_
, this->mapfile_
);
627 size_t next_saw_undefined
= this->symtab_
->saw_undefined();
628 size_t saw_undefined
;
631 saw_undefined
= next_saw_undefined
;
633 for (Input_group::const_iterator p
= r
.u
.input_group
->begin();
634 p
!= r
.u
.input_group
->end();
637 Task_lock_obj
<Archive
> tl(task
, *p
);
639 (*p
)->add_symbols(this->symtab_
, this->layout_
,
640 this->input_objects_
, this->mapfile_
);
643 next_saw_undefined
= this->symtab_
->saw_undefined();
645 while (saw_undefined
!= next_saw_undefined
);
648 for (size_t i
= rescan_pos
; i
< min_rescan_pos
+ 1; ++i
)
650 if (this->rescannable_
[i
].is_archive
)
651 delete this->rescannable_
[i
].u
.archive
;
653 delete this->rescannable_
[i
].u
.input_group
;
656 rescan_pos
= min_rescan_pos
+ 1;
660 // Return whether the rescannable at index I defines SYM.
663 Plugin_manager::rescannable_defines(size_t i
, Symbol
* sym
)
665 const Rescannable
& r(this->rescannable_
[i
]);
667 return r
.u
.archive
->defines_symbol(sym
);
670 for (Input_group::const_iterator p
= r
.u
.input_group
->begin();
671 p
!= r
.u
.input_group
->end();
674 if ((*p
)->defines_symbol(sym
))
681 // Layout deferred objects.
684 Plugin_manager::layout_deferred_objects()
686 Deferred_layout_list::iterator obj
;
688 for (obj
= this->deferred_layout_objects_
.begin();
689 obj
!= this->deferred_layout_objects_
.end();
692 // Lock the object so we can read from it. This is only called
693 // single-threaded from queue_middle_tasks, so it is OK to lock.
694 // Unfortunately we have no way to pass in a Task token.
695 const Task
* dummy_task
= reinterpret_cast<const Task
*>(-1);
696 Task_lock_obj
<Object
> tl(dummy_task
, *obj
);
697 (*obj
)->layout_deferred_sections(this->layout_
);
701 // Call the cleanup handlers.
704 Plugin_manager::cleanup()
706 if (this->any_added_
)
708 // If any input files were added, close all the input files.
709 // This is because the plugin may want to remove them, and on
710 // Windows you are not allowed to remove an open file.
711 close_all_descriptors();
714 for (this->current_
= this->plugins_
.begin();
715 this->current_
!= this->plugins_
.end();
717 (*this->current_
)->cleanup();
720 // Make a new Pluginobj object. This is called when the plugin calls
721 // the add_symbols API.
724 Plugin_manager::make_plugin_object(unsigned int handle
)
726 // Make sure we aren't asked to make an object for the same handle twice.
727 if (this->objects_
.size() != handle
728 && this->objects_
[handle
]->pluginobj() != NULL
)
731 Pluginobj
* obj
= make_sized_plugin_object(this->input_file_
,
732 this->plugin_input_file_
.offset
,
733 this->plugin_input_file_
.filesize
);
736 // If the elf object for this file was pushed into the objects_ vector, delete
737 // it to make room for the Pluginobj as this file is claimed.
738 if (this->objects_
.size() != handle
)
739 this->objects_
.pop_back();
741 this->objects_
.push_back(obj
);
745 // Get the input file information with an open (possibly re-opened)
749 Plugin_manager::get_input_file(unsigned int handle
,
750 struct ld_plugin_input_file
* file
)
752 Pluginobj
* obj
= this->object(handle
)->pluginobj();
754 return LDPS_BAD_HANDLE
;
756 obj
->lock(this->task_
);
757 file
->name
= obj
->filename().c_str();
758 file
->fd
= obj
->descriptor();
759 file
->offset
= obj
->offset();
760 file
->filesize
= obj
->filesize();
761 file
->handle
= reinterpret_cast<void*>(handle
);
765 // Release the input file.
768 Plugin_manager::release_input_file(unsigned int handle
)
770 if (this->object(handle
) == NULL
)
771 return LDPS_BAD_HANDLE
;
773 Pluginobj
* obj
= this->object(handle
)->pluginobj();
776 return LDPS_BAD_HANDLE
;
778 obj
->unlock(this->task_
);
782 // Get the elf object corresponding to the handle. Return NULL if we
783 // found a Pluginobj instead.
786 Plugin_manager::get_elf_object(const void* handle
)
788 Object
* obj
= this->object(
789 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
)));
791 // The object should not be a Pluginobj.
793 || obj
->pluginobj() != NULL
)
800 Plugin_manager::get_view(unsigned int handle
, const void **viewp
)
804 Input_file
*input_file
;
805 if (this->in_claim_file_handler_
)
807 // We are being called from the claim_file hook.
808 const struct ld_plugin_input_file
&f
= this->plugin_input_file_
;
810 filesize
= f
.filesize
;
811 input_file
= this->input_file_
;
815 // An already claimed file.
816 if (this->object(handle
) == NULL
)
817 return LDPS_BAD_HANDLE
;
818 Pluginobj
* obj
= this->object(handle
)->pluginobj();
820 return LDPS_BAD_HANDLE
;
821 offset
= obj
->offset();
822 filesize
= obj
->filesize();
823 input_file
= obj
->input_file();
825 *viewp
= (void*) input_file
->file().get_view(offset
, 0, filesize
, false,
830 // Add a new library path.
833 Plugin_manager::set_extra_library_path(const char* path
)
835 this->extra_search_path_
= std::string(path
);
839 // Add a new input file.
842 Plugin_manager::add_input_file(const char* pathname
, bool is_lib
)
844 Input_file_argument
file(pathname
,
846 ? Input_file_argument::INPUT_FILE_TYPE_LIBRARY
847 : Input_file_argument::INPUT_FILE_TYPE_FILE
),
849 ? this->extra_search_path_
.c_str()
853 Input_argument
* input_argument
= new Input_argument(file
);
854 Task_token
* next_blocker
= new Task_token(true);
855 next_blocker
->add_blocker();
856 if (parameters
->incremental())
857 gold_error(_("input files added by plug-ins in --incremental mode not "
859 this->workqueue_
->queue_soon(new Read_symbols(this->input_objects_
,
870 this->this_blocker_
= next_blocker
;
871 this->any_added_
= true;
877 Pluginobj::Pluginobj(const std::string
& name
, Input_file
* input_file
,
878 off_t offset
, off_t filesize
)
879 : Object(name
, input_file
, false, offset
),
880 nsyms_(0), syms_(NULL
), symbols_(), filesize_(filesize
), comdat_map_()
884 // Return TRUE if a defined symbol is referenced from outside the
885 // universe of claimed objects. Only references from relocatable,
886 // non-IR (unclaimed) objects count as a reference. References from
887 // dynamic objects count only as "visible".
890 is_referenced_from_outside(Symbol
* lsym
)
892 if (lsym
->in_real_elf())
894 if (parameters
->options().relocatable())
896 if (parameters
->options().is_undefined(lsym
->name()))
901 // Return TRUE if a defined symbol might be reachable from outside the
905 is_visible_from_outside(Symbol
* lsym
)
909 if (parameters
->options().export_dynamic() || parameters
->options().shared())
910 return lsym
->is_externally_visible();
914 // Get symbol resolution info.
917 Pluginobj::get_symbol_resolution_info(Symbol_table
* symtab
,
919 ld_plugin_symbol
* syms
,
922 // For version 1 of this interface, we cannot use
923 // LDPR_PREVAILING_DEF_IRONLY_EXP, so we return LDPR_PREVAILING_DEF
925 const ld_plugin_symbol_resolution ldpr_prevailing_def_ironly_exp
927 ? LDPR_PREVAILING_DEF_IRONLY_EXP
928 : LDPR_PREVAILING_DEF
);
930 if (nsyms
> this->nsyms_
)
933 if (static_cast<size_t>(nsyms
) > this->symbols_
.size())
935 // We never decided to include this object. We mark all symbols as
937 gold_assert(this->symbols_
.size() == 0);
938 for (int i
= 0; i
< nsyms
; i
++)
939 syms
[i
].resolution
= LDPR_PREEMPTED_REG
;
943 for (int i
= 0; i
< nsyms
; i
++)
945 ld_plugin_symbol
* isym
= &syms
[i
];
946 Symbol
* lsym
= this->symbols_
[i
];
947 if (lsym
->is_forwarder())
948 lsym
= symtab
->resolve_forwards(lsym
);
949 ld_plugin_symbol_resolution res
= LDPR_UNKNOWN
;
951 if (lsym
->is_undefined())
952 // The symbol remains undefined.
954 else if (isym
->def
== LDPK_UNDEF
955 || isym
->def
== LDPK_WEAKUNDEF
956 || isym
->def
== LDPK_COMMON
)
958 // The original symbol was undefined or common.
959 if (lsym
->source() != Symbol::FROM_OBJECT
)
960 res
= LDPR_RESOLVED_EXEC
;
961 else if (lsym
->object()->pluginobj() == this)
963 if (is_referenced_from_outside(lsym
))
964 res
= LDPR_PREVAILING_DEF
;
965 else if (is_visible_from_outside(lsym
))
966 res
= ldpr_prevailing_def_ironly_exp
;
968 res
= LDPR_PREVAILING_DEF_IRONLY
;
970 else if (lsym
->object()->pluginobj() != NULL
)
971 res
= LDPR_RESOLVED_IR
;
972 else if (lsym
->object()->is_dynamic())
973 res
= LDPR_RESOLVED_DYN
;
975 res
= LDPR_RESOLVED_EXEC
;
979 // The original symbol was a definition.
980 if (lsym
->source() != Symbol::FROM_OBJECT
)
981 res
= LDPR_PREEMPTED_REG
;
982 else if (lsym
->object() == static_cast<const Object
*>(this))
984 if (is_referenced_from_outside(lsym
))
985 res
= LDPR_PREVAILING_DEF
;
986 else if (is_visible_from_outside(lsym
))
987 res
= ldpr_prevailing_def_ironly_exp
;
989 res
= LDPR_PREVAILING_DEF_IRONLY
;
992 res
= (lsym
->object()->pluginobj() != NULL
994 : LDPR_PREEMPTED_REG
);
996 isym
->resolution
= res
;
1001 // Return TRUE if the comdat group with key COMDAT_KEY from this object
1005 Pluginobj::include_comdat_group(std::string comdat_key
, Layout
* layout
)
1007 std::pair
<Comdat_map::iterator
, bool> ins
=
1008 this->comdat_map_
.insert(std::make_pair(comdat_key
, false));
1010 // If this is the first time we've seen this comdat key, ask the
1011 // layout object whether it should be included.
1013 ins
.first
->second
= layout
->find_or_add_kept_section(comdat_key
,
1017 return ins
.first
->second
;
1020 // Class Sized_pluginobj.
1022 template<int size
, bool big_endian
>
1023 Sized_pluginobj
<size
, big_endian
>::Sized_pluginobj(
1024 const std::string
& name
,
1025 Input_file
* input_file
,
1028 : Pluginobj(name
, input_file
, offset
, filesize
)
1032 // Read the symbols. Not used for plugin objects.
1034 template<int size
, bool big_endian
>
1036 Sized_pluginobj
<size
, big_endian
>::do_read_symbols(Read_symbols_data
*)
1041 // Lay out the input sections. Not used for plugin objects.
1043 template<int size
, bool big_endian
>
1045 Sized_pluginobj
<size
, big_endian
>::do_layout(Symbol_table
*, Layout
*,
1051 // Add the symbols to the symbol table.
1053 template<int size
, bool big_endian
>
1055 Sized_pluginobj
<size
, big_endian
>::do_add_symbols(Symbol_table
* symtab
,
1059 const int sym_size
= elfcpp::Elf_sizes
<size
>::sym_size
;
1060 unsigned char symbuf
[sym_size
];
1061 elfcpp::Sym
<size
, big_endian
> sym(symbuf
);
1062 elfcpp::Sym_write
<size
, big_endian
> osym(symbuf
);
1064 this->symbols_
.resize(this->nsyms_
);
1066 for (int i
= 0; i
< this->nsyms_
; ++i
)
1068 const struct ld_plugin_symbol
* isym
= &this->syms_
[i
];
1069 const char* name
= isym
->name
;
1070 const char* ver
= isym
->version
;
1071 elfcpp::Elf_Half shndx
;
1075 if (name
!= NULL
&& name
[0] == '\0')
1077 if (ver
!= NULL
&& ver
[0] == '\0')
1083 case LDPK_WEAKUNDEF
:
1084 bind
= elfcpp::STB_WEAK
;
1090 bind
= elfcpp::STB_GLOBAL
;
1098 shndx
= elfcpp::SHN_ABS
;
1101 shndx
= elfcpp::SHN_COMMON
;
1104 case LDPK_WEAKUNDEF
:
1106 shndx
= elfcpp::SHN_UNDEF
;
1110 switch (isym
->visibility
)
1112 case LDPV_PROTECTED
:
1113 vis
= elfcpp::STV_PROTECTED
;
1116 vis
= elfcpp::STV_INTERNAL
;
1119 vis
= elfcpp::STV_HIDDEN
;
1123 vis
= elfcpp::STV_DEFAULT
;
1127 if (isym
->comdat_key
!= NULL
1128 && isym
->comdat_key
[0] != '\0'
1129 && !this->include_comdat_group(isym
->comdat_key
, layout
))
1130 shndx
= elfcpp::SHN_UNDEF
;
1132 osym
.put_st_name(0);
1133 osym
.put_st_value(0);
1134 osym
.put_st_size(0);
1135 osym
.put_st_info(bind
, elfcpp::STT_NOTYPE
);
1136 osym
.put_st_other(vis
, 0);
1137 osym
.put_st_shndx(shndx
);
1140 symtab
->add_from_pluginobj
<size
, big_endian
>(this, name
, ver
, &sym
);
1144 template<int size
, bool big_endian
>
1145 Archive::Should_include
1146 Sized_pluginobj
<size
, big_endian
>::do_should_include_member(
1147 Symbol_table
* symtab
,
1152 char* tmpbuf
= NULL
;
1153 size_t tmpbuflen
= 0;
1155 for (int i
= 0; i
< this->nsyms_
; ++i
)
1157 const struct ld_plugin_symbol
& sym
= this->syms_
[i
];
1158 const char* name
= sym
.name
;
1160 Archive::Should_include t
= Archive::should_include_member(symtab
,
1166 if (t
== Archive::SHOULD_INCLUDE_YES
)
1175 return Archive::SHOULD_INCLUDE_UNKNOWN
;
1178 // Iterate over global symbols, calling a visitor class V for each.
1180 template<int size
, bool big_endian
>
1182 Sized_pluginobj
<size
, big_endian
>::do_for_all_global_symbols(
1184 Library_base::Symbol_visitor_base
* v
)
1186 for (int i
= 0; i
< this->nsyms_
; ++i
)
1188 const struct ld_plugin_symbol
& sym
= this->syms_
[i
];
1189 if (sym
.def
!= LDPK_UNDEF
)
1194 // Iterate over local symbols, calling a visitor class V for each GOT offset
1195 // associated with a local symbol.
1196 template<int size
, bool big_endian
>
1198 Sized_pluginobj
<size
, big_endian
>::do_for_all_local_got_entries(
1199 Got_offset_list::Visitor
*) const
1204 // Get the size of a section. Not used for plugin objects.
1206 template<int size
, bool big_endian
>
1208 Sized_pluginobj
<size
, big_endian
>::do_section_size(unsigned int)
1214 // Get the name of a section. Not used for plugin objects.
1216 template<int size
, bool big_endian
>
1218 Sized_pluginobj
<size
, big_endian
>::do_section_name(unsigned int) const
1221 return std::string();
1224 // Return a view of the contents of a section. Not used for plugin objects.
1226 template<int size
, bool big_endian
>
1227 const unsigned char*
1228 Sized_pluginobj
<size
, big_endian
>::do_section_contents(
1237 // Return section flags. Not used for plugin objects.
1239 template<int size
, bool big_endian
>
1241 Sized_pluginobj
<size
, big_endian
>::do_section_flags(unsigned int)
1247 // Return section entsize. Not used for plugin objects.
1249 template<int size
, bool big_endian
>
1251 Sized_pluginobj
<size
, big_endian
>::do_section_entsize(unsigned int)
1257 // Return section address. Not used for plugin objects.
1259 template<int size
, bool big_endian
>
1261 Sized_pluginobj
<size
, big_endian
>::do_section_address(unsigned int)
1267 // Return section type. Not used for plugin objects.
1269 template<int size
, bool big_endian
>
1271 Sized_pluginobj
<size
, big_endian
>::do_section_type(unsigned int)
1277 // Return the section link field. Not used for plugin objects.
1279 template<int size
, bool big_endian
>
1281 Sized_pluginobj
<size
, big_endian
>::do_section_link(unsigned int)
1287 // Return the section link field. Not used for plugin objects.
1289 template<int size
, bool big_endian
>
1291 Sized_pluginobj
<size
, big_endian
>::do_section_info(unsigned int)
1297 // Return the section alignment. Not used for plugin objects.
1299 template<int size
, bool big_endian
>
1301 Sized_pluginobj
<size
, big_endian
>::do_section_addralign(unsigned int)
1307 // Return the Xindex structure to use. Not used for plugin objects.
1309 template<int size
, bool big_endian
>
1311 Sized_pluginobj
<size
, big_endian
>::do_initialize_xindex()
1317 // Get symbol counts. Don't count plugin objects; the replacement
1318 // files will provide the counts.
1320 template<int size
, bool big_endian
>
1322 Sized_pluginobj
<size
, big_endian
>::do_get_global_symbol_counts(
1323 const Symbol_table
*,
1331 // Get symbols. Not used for plugin objects.
1333 template<int size
, bool big_endian
>
1334 const Object::Symbols
*
1335 Sized_pluginobj
<size
, big_endian
>::do_get_global_symbols() const
1340 // Class Plugin_finish. This task runs after all replacement files have
1341 // been added. For now, it's a placeholder for a possible plugin API
1342 // to allow the plugin to release most of its resources. The cleanup
1343 // handlers must be called later, because they can remove the temporary
1344 // object files that are needed until the end of the link.
1346 class Plugin_finish
: public Task
1349 Plugin_finish(Task_token
* this_blocker
, Task_token
* next_blocker
)
1350 : this_blocker_(this_blocker
), next_blocker_(next_blocker
)
1355 if (this->this_blocker_
!= NULL
)
1356 delete this->this_blocker_
;
1362 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1363 return this->this_blocker_
;
1368 locks(Task_locker
* tl
)
1369 { tl
->add(this, this->next_blocker_
); }
1374 // We could call early cleanup handlers here.
1379 { return "Plugin_finish"; }
1382 Task_token
* this_blocker_
;
1383 Task_token
* next_blocker_
;
1386 // Class Plugin_hook.
1388 Plugin_hook::~Plugin_hook()
1392 // Return whether a Plugin_hook task is runnable.
1395 Plugin_hook::is_runnable()
1397 if (this->this_blocker_
!= NULL
&& this->this_blocker_
->is_blocked())
1398 return this->this_blocker_
;
1402 // Return a Task_locker for a Plugin_hook task. We don't need any
1406 Plugin_hook::locks(Task_locker
*)
1410 // Run the "all symbols read" plugin hook.
1413 Plugin_hook::run(Workqueue
* workqueue
)
1415 gold_assert(this->options_
.has_plugins());
1416 Symbol
* start_sym
= this->symtab_
->lookup(parameters
->entry());
1417 if (start_sym
!= NULL
)
1418 start_sym
->set_in_real_elf();
1420 this->options_
.plugins()->all_symbols_read(workqueue
,
1422 this->input_objects_
,
1426 &this->this_blocker_
);
1427 workqueue
->queue_soon(new Plugin_finish(this->this_blocker_
,
1428 this->next_blocker_
));
1431 // The C interface routines called by the plugins.
1433 #ifdef ENABLE_PLUGINS
1435 // Register a claim-file handler.
1437 static enum ld_plugin_status
1438 register_claim_file(ld_plugin_claim_file_handler handler
)
1440 gold_assert(parameters
->options().has_plugins());
1441 parameters
->options().plugins()->set_claim_file_handler(handler
);
1445 // Register an all-symbols-read handler.
1447 static enum ld_plugin_status
1448 register_all_symbols_read(ld_plugin_all_symbols_read_handler handler
)
1450 gold_assert(parameters
->options().has_plugins());
1451 parameters
->options().plugins()->set_all_symbols_read_handler(handler
);
1455 // Register a cleanup handler.
1457 static enum ld_plugin_status
1458 register_cleanup(ld_plugin_cleanup_handler handler
)
1460 gold_assert(parameters
->options().has_plugins());
1461 parameters
->options().plugins()->set_cleanup_handler(handler
);
1465 // Add symbols from a plugin-claimed input file.
1467 static enum ld_plugin_status
1468 add_symbols(void* handle
, int nsyms
, const ld_plugin_symbol
* syms
)
1470 gold_assert(parameters
->options().has_plugins());
1471 Pluginobj
* obj
= parameters
->options().plugins()->make_plugin_object(
1472 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
)));
1475 obj
->store_incoming_symbols(nsyms
, syms
);
1479 // Get the input file information with an open (possibly re-opened)
1482 static enum ld_plugin_status
1483 get_input_file(const void* handle
, struct ld_plugin_input_file
* file
)
1485 gold_assert(parameters
->options().has_plugins());
1486 unsigned int obj_index
=
1487 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
));
1488 return parameters
->options().plugins()->get_input_file(obj_index
, file
);
1491 // Release the input file.
1493 static enum ld_plugin_status
1494 release_input_file(const void* handle
)
1496 gold_assert(parameters
->options().has_plugins());
1497 unsigned int obj_index
=
1498 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
));
1499 return parameters
->options().plugins()->release_input_file(obj_index
);
1502 static enum ld_plugin_status
1503 get_view(const void *handle
, const void **viewp
)
1505 gold_assert(parameters
->options().has_plugins());
1506 unsigned int obj_index
=
1507 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
));
1508 return parameters
->options().plugins()->get_view(obj_index
, viewp
);
1511 // Get the symbol resolution info for a plugin-claimed input file.
1513 static enum ld_plugin_status
1514 get_symbols(const void* handle
, int nsyms
, ld_plugin_symbol
* syms
)
1516 gold_assert(parameters
->options().has_plugins());
1517 Plugin_manager
* plugins
= parameters
->options().plugins();
1518 Object
* obj
= plugins
->object(
1519 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
)));
1522 Pluginobj
* plugin_obj
= obj
->pluginobj();
1523 if (plugin_obj
== NULL
)
1525 Symbol_table
* symtab
= plugins
->symtab();
1526 return plugin_obj
->get_symbol_resolution_info(symtab
, nsyms
, syms
, 1);
1529 // Version 2 of the above. The only difference is that this version
1530 // is allowed to return the resolution code LDPR_PREVAILING_DEF_IRONLY_EXP.
1532 static enum ld_plugin_status
1533 get_symbols_v2(const void* handle
, int nsyms
, ld_plugin_symbol
* syms
)
1535 gold_assert(parameters
->options().has_plugins());
1536 Plugin_manager
* plugins
= parameters
->options().plugins();
1537 Object
* obj
= plugins
->object(
1538 static_cast<unsigned int>(reinterpret_cast<intptr_t>(handle
)));
1541 Pluginobj
* plugin_obj
= obj
->pluginobj();
1542 if (plugin_obj
== NULL
)
1544 Symbol_table
* symtab
= plugins
->symtab();
1545 return plugin_obj
->get_symbol_resolution_info(symtab
, nsyms
, syms
, 2);
1548 // Add a new (real) input file generated by a plugin.
1550 static enum ld_plugin_status
1551 add_input_file(const char* pathname
)
1553 gold_assert(parameters
->options().has_plugins());
1554 return parameters
->options().plugins()->add_input_file(pathname
, false);
1557 // Add a new (real) library required by a plugin.
1559 static enum ld_plugin_status
1560 add_input_library(const char* pathname
)
1562 gold_assert(parameters
->options().has_plugins());
1563 return parameters
->options().plugins()->add_input_file(pathname
, true);
1566 // Set the extra library path to be used by libraries added via
1567 // add_input_library
1569 static enum ld_plugin_status
1570 set_extra_library_path(const char* path
)
1572 gold_assert(parameters
->options().has_plugins());
1573 return parameters
->options().plugins()->set_extra_library_path(path
);
1576 // Issue a diagnostic message from a plugin.
1578 static enum ld_plugin_status
1579 message(int level
, const char* format
, ...)
1582 va_start(args
, format
);
1587 parameters
->errors()->info(format
, args
);
1590 parameters
->errors()->warning(format
, args
);
1594 parameters
->errors()->error(format
, args
);
1597 parameters
->errors()->fatal(format
, args
);
1605 // Get the section count of the object corresponding to the handle. This
1606 // plugin interface can only be called in the claim_file handler of the plugin.
1608 static enum ld_plugin_status
1609 get_input_section_count(const void* handle
, unsigned int* count
)
1611 gold_assert(parameters
->options().has_plugins());
1613 if (!parameters
->options().plugins()->in_claim_file_handler())
1616 Object
* obj
= parameters
->options().plugins()->get_elf_object(handle
);
1621 *count
= obj
->shnum();
1625 // Get the type of the specified section in the object corresponding
1626 // to the handle. This plugin interface can only be called in the
1627 // claim_file handler of the plugin.
1629 static enum ld_plugin_status
1630 get_input_section_type(const struct ld_plugin_section section
,
1633 gold_assert(parameters
->options().has_plugins());
1635 if (!parameters
->options().plugins()->in_claim_file_handler())
1639 = parameters
->options().plugins()->get_elf_object(section
.handle
);
1642 return LDPS_BAD_HANDLE
;
1644 *type
= obj
->section_type(section
.shndx
);
1648 // Get the name of the specified section in the object corresponding
1649 // to the handle. This plugin interface can only be called in the
1650 // claim_file handler of the plugin.
1652 static enum ld_plugin_status
1653 get_input_section_name(const struct ld_plugin_section section
,
1654 char** section_name_ptr
)
1656 gold_assert(parameters
->options().has_plugins());
1658 if (!parameters
->options().plugins()->in_claim_file_handler())
1662 = parameters
->options().plugins()->get_elf_object(section
.handle
);
1665 return LDPS_BAD_HANDLE
;
1667 // Check if the object is locked before getting the section name.
1668 gold_assert(obj
->is_locked());
1670 const std::string section_name
= obj
->section_name(section
.shndx
);
1671 *section_name_ptr
= static_cast<char*>(malloc(section_name
.length() + 1));
1672 memcpy(*section_name_ptr
, section_name
.c_str(), section_name
.length() + 1);
1676 // Get the contents of the specified section in the object corresponding
1677 // to the handle. This plugin interface can only be called in the
1678 // claim_file handler of the plugin.
1680 static enum ld_plugin_status
1681 get_input_section_contents(const struct ld_plugin_section section
,
1682 const unsigned char** section_contents_ptr
,
1685 gold_assert(parameters
->options().has_plugins());
1687 if (!parameters
->options().plugins()->in_claim_file_handler())
1691 = parameters
->options().plugins()->get_elf_object(section
.handle
);
1694 return LDPS_BAD_HANDLE
;
1696 // Check if the object is locked before getting the section contents.
1697 gold_assert(obj
->is_locked());
1699 section_size_type plen
;
1700 *section_contents_ptr
1701 = obj
->section_contents(section
.shndx
, &plen
, false);
1706 // Specify the ordering of sections in the final layout. The sections are
1707 // specified as (handle,shndx) pairs in the two arrays in the order in
1708 // which they should appear in the final layout.
1710 static enum ld_plugin_status
1711 update_section_order(const struct ld_plugin_section
* section_list
,
1712 unsigned int num_sections
)
1714 gold_assert(parameters
->options().has_plugins());
1716 if (num_sections
== 0)
1719 if (section_list
== NULL
)
1722 Layout
* layout
= parameters
->options().plugins()->layout();
1723 gold_assert (layout
!= NULL
);
1725 std::map
<Section_id
, unsigned int>* order_map
1726 = layout
->get_section_order_map();
1728 /* Store the mapping from Section_id to section position in layout's
1729 order_map to consult after output sections are added. */
1730 for (unsigned int i
= 0; i
< num_sections
; ++i
)
1732 Object
* obj
= parameters
->options().plugins()->get_elf_object(
1733 section_list
[i
].handle
);
1734 if (obj
== NULL
|| obj
->is_dynamic())
1735 return LDPS_BAD_HANDLE
;
1736 unsigned int shndx
= section_list
[i
].shndx
;
1737 Section_id
secn_id(static_cast<Relobj
*>(obj
), shndx
);
1738 (*order_map
)[secn_id
] = i
+ 1;
1744 // Let the linker know that the sections could be reordered.
1746 static enum ld_plugin_status
1747 allow_section_ordering()
1749 gold_assert(parameters
->options().has_plugins());
1750 Layout
* layout
= parameters
->options().plugins()->layout();
1751 layout
->set_section_ordering_specified();
1755 // Let the linker know that a subset of sections could be mapped
1756 // to a unique segment.
1758 static enum ld_plugin_status
1759 allow_unique_segment_for_sections()
1761 gold_assert(parameters
->options().has_plugins());
1762 Layout
* layout
= parameters
->options().plugins()->layout();
1763 layout
->set_unique_segment_for_sections_specified();
1767 // This function should map the list of sections specified in the
1768 // SECTION_LIST to a unique segment. ELF segments do not have names
1769 // and the NAME is used to identify Output Section which should contain
1770 // the list of sections. This Output Section will then be mapped to
1771 // a unique segment. FLAGS is used to specify if any additional segment
1772 // flags need to be set. For instance, a specific segment flag can be
1773 // set to identify this segment. Unsetting segment flags is not possible.
1774 // ALIGN specifies the alignment of the segment.
1776 static enum ld_plugin_status
1777 unique_segment_for_sections(const char* segment_name
,
1780 const struct ld_plugin_section
* section_list
,
1781 unsigned int num_sections
)
1783 gold_assert(parameters
->options().has_plugins());
1785 if (num_sections
== 0)
1788 if (section_list
== NULL
)
1791 Layout
* layout
= parameters
->options().plugins()->layout();
1792 gold_assert (layout
!= NULL
);
1794 Layout::Unique_segment_info
* s
= new Layout::Unique_segment_info
;
1795 s
->name
= segment_name
;
1799 for (unsigned int i
= 0; i
< num_sections
; ++i
)
1801 Object
* obj
= parameters
->options().plugins()->get_elf_object(
1802 section_list
[i
].handle
);
1803 if (obj
== NULL
|| obj
->is_dynamic())
1804 return LDPS_BAD_HANDLE
;
1805 unsigned int shndx
= section_list
[i
].shndx
;
1806 Const_section_id
secn_id(static_cast<Relobj
*>(obj
), shndx
);
1807 layout
->insert_section_segment_map(secn_id
, s
);
1813 #endif // ENABLE_PLUGINS
1815 // Allocate a Pluginobj object of the appropriate size and endianness.
1818 make_sized_plugin_object(Input_file
* input_file
, off_t offset
, off_t filesize
)
1820 Pluginobj
* obj
= NULL
;
1822 parameters_force_valid_target();
1823 const Target
& target(parameters
->target());
1825 if (target
.get_size() == 32)
1827 if (target
.is_big_endian())
1828 #ifdef HAVE_TARGET_32_BIG
1829 obj
= new Sized_pluginobj
<32, true>(input_file
->filename(),
1830 input_file
, offset
, filesize
);
1832 gold_error(_("%s: not configured to support "
1833 "32-bit big-endian object"),
1834 input_file
->filename().c_str());
1837 #ifdef HAVE_TARGET_32_LITTLE
1838 obj
= new Sized_pluginobj
<32, false>(input_file
->filename(),
1839 input_file
, offset
, filesize
);
1841 gold_error(_("%s: not configured to support "
1842 "32-bit little-endian object"),
1843 input_file
->filename().c_str());
1846 else if (target
.get_size() == 64)
1848 if (target
.is_big_endian())
1849 #ifdef HAVE_TARGET_64_BIG
1850 obj
= new Sized_pluginobj
<64, true>(input_file
->filename(),
1851 input_file
, offset
, filesize
);
1853 gold_error(_("%s: not configured to support "
1854 "64-bit big-endian object"),
1855 input_file
->filename().c_str());
1858 #ifdef HAVE_TARGET_64_LITTLE
1859 obj
= new Sized_pluginobj
<64, false>(input_file
->filename(),
1860 input_file
, offset
, filesize
);
1862 gold_error(_("%s: not configured to support "
1863 "64-bit little-endian object"),
1864 input_file
->filename().c_str());
1868 gold_assert(obj
!= NULL
);
1872 } // End namespace gold.