OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [binutils-2.20.1/] [gold/] [target-select.cc] - Blame information for rev 818

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 205 julius
// target-select.cc -- select a target for an object file
2
 
3
// Copyright 2006, 2007, 2008 Free Software Foundation, Inc.
4
// Written by Ian Lance Taylor <iant@google.com>.
5
 
6
// This file is part of gold.
7
 
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.
12
 
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.
17
 
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.
22
 
23
#include "gold.h"
24
 
25
#include <cstring>
26
 
27
#include "elfcpp.h"
28
#include "target-select.h"
29
 
30
namespace
31
{
32
 
33
// The start of the list of target selectors.
34
 
35
gold::Target_selector* target_selectors;
36
 
37
} // End anonymous namespace.
38
 
39
namespace gold
40
{
41
 
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
44
// fast.
45
 
46
Target_selector::Target_selector(int machine, int size, bool is_big_endian,
47
                                 const char* bfd_name)
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_)
51
 
52
{
53
  this->next_ = target_selectors;
54
  target_selectors = this;
55
}
56
 
57
// Instantiate the target and return it.  Use a lock to avoid
58
// instantiating two instances of the same target.
59
 
60
Target*
61
Target_selector::instantiate_target()
62
{
63
  // We assume that the pointer will either be written entirely or not
64
  // at all.
65
  if (this->instantiated_target_ == NULL)
66
    {
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();
71
    }
72
  return this->instantiated_target_;
73
}
74
 
75
// Find the target for an ELF file.
76
 
77
Target*
78
select_target(int machine, int size, bool is_big_endian, int osabi,
79
              int abiversion)
80
{
81
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
82
    {
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))
87
        {
88
          Target* ret = p->recognize(machine, osabi, abiversion);
89
          if (ret != NULL)
90
            return ret;
91
        }
92
    }
93
  return NULL;
94
}
95
 
96
// Find a target using a BFD name.  This is used to support the
97
// --oformat option.
98
 
99
Target*
100
select_target_by_name(const char* name)
101
{
102
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
103
    {
104
      const char* pname = p->bfd_name();
105
      if (pname == NULL || strcmp(pname, name) == 0)
106
        {
107
          Target* ret = p->recognize_by_name(name);
108
          if (ret != NULL)
109
            return ret;
110
        }
111
    }
112
  return NULL;
113
}
114
 
115
// Push all the supported BFD names onto a vector.
116
 
117
void
118
supported_target_names(std::vector<const char*>* names)
119
{
120
  for (Target_selector* p = target_selectors; p != NULL; p = p->next())
121
    p->supported_names(names);
122
}
123
 
124
} // End namespace gold.

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.