9dbebe783077ad76f755c483faa2056de41ebaf7
1 // freebsd.h -- FreeBSD support for gold -*- C++ -*-
3 // Copyright 2009 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.
24 #include "target-select.h"
26 #ifndef GOLD_FREEBSD_H
27 #define GOLD_FREEBSD_H
32 // FreeBSD 4.1 and later wants the EI_OSABI field in the ELF header to
33 // be set to ELFOSABI_FREEBSD. This is a subclass of Sized_target
34 // which supports that. The real target would be a subclass of this
35 // one. We permit combining FreeBSD and non-FreeBSD object files.
36 // The effect of this target is to set the code in the output file.
38 template<int size
, bool big_endian
>
39 class Target_freebsd
: public Sized_target
<size
, big_endian
>
42 // Set the value to use for the EI_OSABI field in the ELF header.
44 set_osabi(elfcpp::ELFOSABI osabi
)
45 { this->osabi_
= osabi
; }
48 Target_freebsd(const Target::Target_info
* pti
)
49 : Sized_target
<size
, big_endian
>(pti
),
50 osabi_(elfcpp::ELFOSABI_NONE
)
54 do_adjust_elf_header(unsigned char* view
, int len
) const;
57 // Value to store in the EI_OSABI field of the ELF file header.
58 elfcpp::ELFOSABI osabi_
;
61 // Adjust the ELF file header by storing the requested value in the
62 // OSABI field. This is for FreeBSD support.
64 template<int size
, bool big_endian
>
66 Target_freebsd
<size
, big_endian
>::do_adjust_elf_header(unsigned char* view
,
69 if (this->osabi_
!= elfcpp::ELFOSABI_NONE
)
71 gold_assert(len
== elfcpp::Elf_sizes
<size
>::ehdr_size
);
73 elfcpp::Ehdr
<size
, false> ehdr(view
);
74 unsigned char e_ident
[elfcpp::EI_NIDENT
];
75 memcpy(e_ident
, ehdr
.get_e_ident(), elfcpp::EI_NIDENT
);
77 e_ident
[elfcpp::EI_OSABI
] = this->osabi_
;
79 elfcpp::Ehdr_write
<size
, false> oehdr(view
);
80 oehdr
.put_e_ident(e_ident
);
84 // A target selector for targets which permit combining both FreeBSD
85 // and non-FreeBSD object files.
87 class Target_selector_freebsd
: public Target_selector
90 Target_selector_freebsd(int amachine
, int size
, bool is_big_end
,
92 const char* freebsd_bfd_name
)
93 : Target_selector(amachine
, size
, is_big_end
, NULL
),
94 bfd_name_(bfdname
), freebsd_bfd_name_(freebsd_bfd_name
)
98 // If we see a FreeBSD input file, mark the output file as using
101 do_recognize(int, int osabi
, int)
103 Target
* ret
= this->instantiate_target();
104 if (osabi
== elfcpp::ELFOSABI_FREEBSD
)
105 this->set_osabi(ret
);
109 // Recognize two names.
111 do_recognize_by_name(const char* name
)
113 if (strcmp(name
, this->bfd_name_
) == 0)
114 return this->instantiate_target();
115 else if (strcmp(name
, this->freebsd_bfd_name_
) == 0)
117 Target
* ret
= this->instantiate_target();
118 this->set_osabi(ret
);
125 // Print both names in --help output.
127 do_supported_names(std::vector
<const char*>* names
)
129 names
->push_back(this->bfd_name_
);
130 names
->push_back(this->freebsd_bfd_name_
);
134 // Set the OSABI field. This is quite ugly.
136 set_osabi(Target
* target
)
138 if (this->get_size() == 32)
140 if (this->is_big_endian())
141 static_cast<Target_freebsd
<32, true>*>(target
)->
142 set_osabi(elfcpp::ELFOSABI_FREEBSD
);
144 static_cast<Target_freebsd
<32, false>*>(target
)->
145 set_osabi(elfcpp::ELFOSABI_FREEBSD
);
147 else if (this->get_size() == 64)
149 if (this->is_big_endian())
150 static_cast<Target_freebsd
<64, true>*>(target
)->
151 set_osabi(elfcpp::ELFOSABI_FREEBSD
);
153 static_cast<Target_freebsd
<64, false>*>(target
)->
154 set_osabi(elfcpp::ELFOSABI_FREEBSD
);
160 // The BFD name for the non-Freebsd target.
161 const char* bfd_name_
;
162 // The BFD name for the Freebsd target.
163 const char* freebsd_bfd_name_
;
166 } // end namespace gold
168 #endif // !defined(GOLD_FREEBSD_H)
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