1 // target-select.cc -- select a target for an object file
3 // Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@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.
28 #include "target-select.h"
33 // The start of the list of target selectors.
35 gold::Target_selector
* target_selectors
;
37 } // End anonymous namespace.
42 // Construct a Target_selector, which means adding it to the linked
43 // list. This runs at global constructor time, so we want it to be
46 Target_selector::Target_selector(int machine
, int size
, bool is_big_endian
,
48 : machine_(machine
), size_(size
), is_big_endian_(is_big_endian
),
49 bfd_name_(bfd_name
), instantiated_target_(NULL
), lock_(NULL
),
50 initialize_lock_(&this->lock_
)
53 this->next_
= target_selectors
;
54 target_selectors
= this;
57 // Instantiate the target and return it. Use a lock to avoid
58 // instantiating two instances of the same target.
61 Target_selector::instantiate_target()
63 // We assume that the pointer will either be written entirely or not
65 if (this->instantiated_target_
== NULL
)
67 this->initialize_lock_
.initialize();
68 Hold_optional_lock
hl(this->lock_
);
69 if (this->instantiated_target_
== NULL
)
70 this->instantiated_target_
= this->do_instantiate_target();
72 return this->instantiated_target_
;
75 // Find the target for an ELF file.
78 select_target(int machine
, int size
, bool is_big_endian
, int osabi
,
81 for (Target_selector
* p
= target_selectors
; p
!= NULL
; p
= p
->next())
83 int pmach
= p
->machine();
84 if ((pmach
== machine
|| pmach
== elfcpp::EM_NONE
)
85 && p
->get_size() == size
86 && (p
->is_big_endian() ? is_big_endian
: !is_big_endian
))
88 Target
* ret
= p
->recognize(machine
, osabi
, abiversion
);
96 // Find a target using a BFD name. This is used to support the
100 select_target_by_name(const char* name
)
102 for (Target_selector
* p
= target_selectors
; p
!= NULL
; p
= p
->next())
104 const char* pname
= p
->bfd_name();
105 if (pname
== NULL
|| strcmp(pname
, name
) == 0)
107 Target
* ret
= p
->recognize_by_name(name
);
115 // Push all the supported BFD names onto a vector.
118 supported_target_names(std::vector
<const char*>* names
)
120 for (Target_selector
* p
= target_selectors
; p
!= NULL
; p
= p
->next())
121 p
->supported_names(names
);
124 } // End namespace gold.
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